WO2013153722A1 - Tube connection structure - Google Patents

Abstract

This tube connection structure is used for a living organism and comprises a first connector (1) and a second connector (11), which are provided to respective ends of two tubes and which are fitted to each other. In a non-fitted state in which the first connector (1) and the second connector (11) are not fitted to each other, the leakage of liquid flowing through the tubes is prevented, and in a fitted state in which the first connector (1) and the second connector (11) are fitted to each other, the two tubes are connected to each other so that the liquid can flow therethrough. The tube connection structure is characterized in that, in the non-fitted state, respective surface regions of both the front end surface (S1) of the first connector (1) which faces the second connector (11) and the front end surface (S2) of the second connector (11) which faces the first connector (1) are substantially flat surfaces.

Description

Tube connection structure

The present invention provides a tube connection structure comprising a first connector and a second connector which are provided at respective end portions of two tubes and fitted together, and in particular, the first connector and the second connector. In the non-fitted state, the liquid flowing through the tube is prevented from leaking, and in the fitted state between the first connector and the second connector, the two tubes are allowed to flow with each other. The present invention relates to a tube connection structure used for living bodies, for example, for medical and welfare purposes.

The so-called urine storage bag is used for patients who have difficulty in urinating by their own will due to the decrease in urinary function and surrounding muscular strength. One side of the urine bag is inserted into the bladder from the patient's urethra for placement. The catheter is attached to the other end of the catheter for use, and functions to store urine flowing through the urinary catheter during urination of the patient.

Such a urine storage bag generally cannot be used separately from the patient because one end side of the urinary catheter is indwelled on the patient's bladder, so that the patient can also perform rehabilitation and bathing. Because it is forced to act with a urine storage bag connected to the bladder via a urinary catheter, when using the urine storage bag, the urinary catheter is torn and damaged, depending on the position and state of the urine storage bag The urine may flow back into the bladder and cause urinary tract infections.
Therefore, in particular, when using such a urine storage bag, it is desired to provide a tube connection structure including the removable first connector and the second connector as described above in the middle of the urinary catheter. Yes.

Conventionally, as this type of tube connection structure including the first connector and the second connector, there are those described in Patent Documents 1 to 3, for example.
Especially, if the tube connection structure described in Patent Document 1 is described in detail, as shown in FIG. 18 in a cross-sectional view along the axial direction of the tube, On the right side in the figure, an outer cylinder 101 to which one of the tubes (not shown) is connected, and a communication pipe that extends in the axial direction of the outer cylinder 101 inside the outer cylinder 101 and communicates the one tube with the outer cylinder 101. 102, an annular valve body 103 that is provided around the communication pipe 102 and opens and closes the inside of the outer cylinder 101, and a first annular valve body 103 that surrounds the communication pipe 102 and biases the annular valve body 103. And a second connector 150 on one end side (left side in the figure) on the other end (not shown). A tube is connected and an inner cylinder 151 provided with an inward flange portion 151a on the other end side (right side in the figure), an inner valve body 152 for opening and closing the inner side of the inward flange portion 151a, and the inner valve body 152 And a tube connecting member 154 for connecting the inner cylinder 151 and the other tube to each other.

Further, Patent Document 2 states that “a stem configured to fit and engage with a complementary structure installed in a complementary connector and define a fluid passage therethrough, complementary to the complementary connector” A housing that is configured to engage with a separate housing, surrounds the stem and defines an opening, and is configured to mate with a complementary valve when the housing engages with the complementary housing; Including a valve disposed over the opening, the stem moving relative to the housing, through the valve and a complementary valve, after the housing engages the complementary housing; Configured to engage a complementary structure, and when the stem moves through the valve and the complementary valve, the valve moves the stem The complementary connector configured fold the valve "is described direction.

Further, in Patent Document 3, “a self-sealing male connector for connecting to a female connector having a fluid opening in a cylindrical cylindrical portion, wherein the cylindrical cylindrical portion is disposed near the opening. A proximal rim with one engagement device, the male connector having a proximal end having a proximal fluid opening and a distal tip forming a distal end of the cylindrical portion; An elongated cylinder including an outer surface having a distal fluid opening at a distal tip and extending in a distal direction; and extending from the proximal opening to the distal opening through the cylindrical portion; A fluid passage having an outer diameter of the distal tip that is small enough to fit within the fluid opening of the female connector, and installed in the cylindrical portion to seal the distal opening of the column An elastic boot that extends over the outer surface of the column, and is installed in the cylindrical portion. A first engaging portion of the female connector such that the second engaging device fixes the female connector and the male connector to each other in an engaging shape. A self-sealing male connector is described that is adapted to interact with the combined device.

International Publication No. 2007/014281 Special table 2010-518330 gazette JP 2011-025066 A

By the way, a so-called urine storage bag used for a patient who has difficulty in urinating by his / her own intention due to a decrease in urinary function and surrounding muscular strength is inserted into the bladder from the patient's urethra and placed in place. It is attached to the other end of the urinary catheter for use, and functions to store urine flowing through the urinary catheter during urination of the patient. In the middle, it is considered to provide a tube connection structure as described above.

However, in the tube connection structure of the prior art shown in FIG. 18, the annular valve body 103 is used to ensure a seal at the contact portion between the first connector 100 and the second connector 150 in the illustrated fitting state. An annular convex portion 103a protruding from the outer surface is provided on the outer surface of the annular valve body 103, and the annular convex portion 103a is formed on the outer surface of the inward flange portion 151a of the inner cylinder 151 facing the outer surface of the annular valve body 103. In the disinfection of the outer surface prior to the connection between the first connector 100 and the second connector 150, which is indispensable in the connection structure of the tube used for the living body, since the annular recess 151b into which is inserted is provided. It was difficult to wipe the inside of the annular recess 151b recessed from the outer surface with, for example, a cloth soaked with a drug.

In particular, when the first connector can be detached from the second connector and the connector is repeatedly used in the mating state and the non-fitting state, the second connector is removed from the first connector. The liquid that flows through the tube needs to be removed from the outer surface, but the tube connection structure shown in FIG. 18 cannot sufficiently wipe out the liquid that has entered the annular recess 151b. It was.
Accordingly, in order to use such a conventional tube connection structure as a tube connection structure used for a living body, for example, an increase in urinary tract infections, etc. due to bacterial growth in the first connector 100 and the second connector 150 There was a hygiene problem.

Moreover, the tube connection structure shown in FIG. 18 is a state in which the first connector 100 and the second connector 150 are not fitted after the second connector 150 is removed from the first connector 100, and in particular, the first connector 100. As shown in FIG. 19, since the annular valve body 103 is located deep inside the outer cylinder 101 from the opening 101a on the other end side of the outer cylinder 101, the outer surface of the annular valve body 103 is also disinfected. And it becomes difficult to remove the liquid.

This invention makes it a subject to solve such a problem which a prior art has, The place made into the objective of those connectors prior to the connection of a 1st connector and a 2nd connector, An object of the present invention is to provide a tube connection structure that can be used in a clean state by enabling easy and reliable disinfection by applying a medicine.

In addition, the “connector” described in Patent Document 2 states that “the stem moves with respect to the housing, passes through the valve and the complementary valve, and the housing engages with the complementary housing. Later configured to engage with the complementary structure ", and" when the stem moves through the valve and the complementary valve, the valve is complementary to the direction in which the stem moves. " Since it is configured to be folded together with a simple valve ”, there is no elastic member such as a spring member that urges the“ housing ”in a direction to remove it from the“ complementary housing ”. Depending on the flow rate of the liquid to be used and other factors, the hardness of the “valve” must be increased to ensure the required pressure resistance of the “valve” to prevent leakage of the liquid. In this case, the “complementary housing” of the “housing” is combined with the action of the frictional force between the two folded “valves”, which are mostly made of rubber material. It may be difficult to remove it.

In addition, in this “connector”, when the “housing” is attached to the “complementary housing”, both the two “valves” are passed through the “stem”. In addition to the force required to fold, the force against the frictional force acting between the two “valves” as described above is required, not only making it difficult to push in the “stem”, Two operations of fitting the “housing” into the “complementary housing” and inserting the “stem” into two “valves” are required, and as a result, The “connector” described in Patent Document 2 is not suitable for use as a tube connection structure including a detachable first connector and a second connector as described above.

On the other hand, in the “automatically sealed male connector” described in Patent Document 3, as shown in the drawing of Patent Document 3, the “female connector” to which the “male connector” is attached is located inside the cylindrical member. If you have a `` piston '' made of an elastic material such as rubber material with a valve part provided at the tip of the bellows-shaped elastic part, place the `` female connector '' inside the `` piston '' The liquid relating to the living body that will flow directly or the component contained in the liquid remains on the inner surface of the bellows-like cylindrical elastic portion of the “piston” and tends to adhere to it. There were problems with hygiene such as generation of off-flavors in the area and breeding of bacteria.
Further, when the above-mentioned “male connector” and “female connector” are provided in the middle of a tube through which blood flows due to the adhesion of such liquid or the like, the bellows-like cylindrical elastic portion of the “piston” If the blood remaining on the inner surface coagulates and the thrombus elutes into the blood vessel, it may cause embolism such as cerebral infarction, pulmonary infarction, myocardial infarction, etc. If provided in the middle, the urinary component adhering to the inner surface of the cylindrical elastic part becomes urinary stone, and when the urine flows back into the bladder, the ureter, urethra, and bladder are occluded and hydronephrosis There was a risk of causing.

In addition, when the component contained in urine adheres to the inner surface of the bellows-like cylindrical elastic part of the “piston”, as described in Patent Document 3, the urine storage bag described above, When the collected urine is visually observed from outside, the urine suspended matter in the urine storage bag is discharged directly from the patient's bladder or on the inner surface of the cylindrical elastic part. Since it is difficult to determine whether the adhering component is peeled off and flows into the bag, there is a problem in that it affects the urine property observation.

An object of the present invention is to solve such a problem of the conventional connection structure of a tube used for a living body, and the object of the present invention is to attach the first connector and the second connector and Another object of the present invention is to provide a tube connection structure capable of realizing excellent operability by making the removal easy without requiring a large force.

Furthermore, this invention makes it a subject to solve such a problem which the conventional connection structure of the tube used for a biological body has, and the place made into the objective is the inside of a 1st connector and a 2nd connector Another object of the present invention is to provide a tube connection structure that can effectively prevent liquid from remaining on and adhering to the tube.

The tube connection structure of the present invention is configured by a first connector and a second connector that are provided at respective end portions of two tubes and are fitted to each other. In the fitted state, the liquid flowing through the tube is prevented from leaking, and in the fitted state between the first connector and the second connector, the two tubes are connected to each other so that the liquid can flow therethrough. A tube connection structure for use in a living body, wherein the distal end surface of the first connector faces the second connector and the distal end of the second connector faces the first connector in the non-fitted state. The surface regions of the surfaces are both substantially flat surfaces.
In the tube connection structure of the present invention, the first connector includes an outer cylinder to which one of the tubes is connected to one end side, and an inner side of the outer cylinder, from one end side of the outer cylinder to an opening on the other end side. A communicating part that extends and communicates the tube and the outer cylinder, and an annular valve body that is provided around the communicating part and seals the opening on the other end side of the outer cylinder in the non-fitted state. The second connector has the other tube connected to one end side, and the other end side portion enters the outer cylinder in the fitted state so that the annular valve body is inserted into the outer cylinder. An inner cylinder that is pushed inward, and in the non-fitted state, is fitted inside the other end portion of the inner cylinder to seal the other end side of the inner cylinder, and in the fitted state, by the communicating portion An inner valve body pushed into the inner cylinder, and the other end of the annular valve body and the inner cylinder Providing a pair of annular seal projections projecting from the respective facing surfaces of each of the parts and coming into contact with each other in the fitted state, preferably at least one made of an elastic material, the non-fitting In the state, the front end surface of the first connector formed at the opening on the other end side of the outer cylinder with the annular valve body and the communication portion, and the inner valve body on the other end side of the inner cylinder It is preferable that each of the surface regions other than the annular seal convex portion of the distal end surface of the second connector formed by the other end portion of the inner cylinder is a flat surface.

In the tube connection structure of the present invention, the first connector further includes a first elastic body that urges the annular valve body toward the other end side of the outer cylinder inside the outer cylinder, and the second connector. It is preferable that the connector further includes a second elastic body that urges the inner valve body toward the other end side of the inner cylinder.

In the tube connection structure of the present invention, the opening on the other end side of the outer cylinder is provided with one or more inward projections protruding toward the inner side of the outer cylinder, and on the outer surface of the inner cylinder, While opening to the other end side of the inner cylinder and extending from the other end side of the inner cylinder toward the one end side, the inward protruding portion enters when the first connector and the second connector are fitted together. It is preferable to provide one or more sliding guide grooves corresponding to the position and number of the inward projections. In this case, it is preferable that the guide groove portion has at least one bent or curved portion at an end portion on one end side of the inner cylinder.

Here, in the tube connection structure of the present invention, at least one flow hole extending in the axial direction of the communication portion is provided on the side wall of the communication portion having a tubular shape with one end sealed with a bottom wall, and the first elastic body And the first elastic body is compressed in the axial direction of the communicating portion in the fitted state to close a gap between the spirally wound windings, and in the non-fitted state It is preferable to restore and arrange around the communication part in such a manner that a gap between the windings opens.
In addition, it is preferable that the inner valve body is provided with an elastic body accommodating portion that accommodates the second elastic body in a compressed posture in the axial direction of the inner cylinder in the fitted state.

In the tube connection structure of the present invention, each of the first connector and the second connector has an outer cylinder having an opening on one end side, and is positioned on one end side of the outer cylinder, and the outer cylinder is in the fitted state. A movable valve body that is pushed into the other end side of the outer cylinder and is movable in the axial direction inside the outer cylinder, and is fixedly arranged on the back side of the movable valve body inside the outer cylinder, and the liquid flows inside Each of the movable valves on the first connector side and the second connector side includes a flow path cylinder and an elastic member that urges the movable valve body toward the opening on the one end side of the outer cylinder. In contact with the flow path cylinder on the back side to the back side of the movable valve body that moves toward the other end side of the outer cylinder that surrounds the movable valve body in the fitted state in the body, It is pushed and spread to one end side of the outer cylinder, and it is that of the first connector side and the second connector side. It is preferred in which a respective slit providing communication of said passage tube body Les.

In the tube connection structure of the present invention, each of the movable valve bodies on the first connector side and the second connector side has a pair of flexible wall portions that are located on both sides of the slit and form the slit, The flexible wall portion of the movable valve body on one connector side and the flexible wall portion of the movable valve body on the second connector side are separated from each other by engaging with each other in the fitted state. It is preferable that a part of the flow path is formed by surrounding a gap between the flow path cylinder on the first connector side and the flow path cylinder on the second connector side.
In this case, in the fitted state, the end of the flow channel cylinder on the first connector side is moved to the flexible valve body on both sides of the slit of the movable valve body on the first connector side. The end portion of the flow path cylinder on the second connector side is positioned between the flexible wall portions on both sides of the widened slit of the movable valve body on the second connector side. It is preferable to make it.

In the tube connection structure of the present invention, one or more inward projections projecting toward the inside of the outer cylinder are provided in the opening of the outer cylinder of either the first connector or the second connector. In addition, the outer surface of the other outer cylinder that enters the inside of the one outer cylinder in the fitted state opens to one end side of the other outer cylinder, and the other outer side from one end side of the other outer cylinder The guide groove portion that extends inwardly and slides when the first connector and the second connector are fitted with each other corresponds to the arrangement position and the number of the inward projection portions. It is preferable to provide one or more.
Here, it is preferable that the guide groove portion has at least one bent or curved portion at an end portion on the other end side of the outer cylinder provided with the guide groove portion.

In the tube connection structure of the present invention, it is preferable that the first connector and the second connector have at least one rigid support member on the back surface of the movable valve body.

In the tube connection structure of the present invention, each of the first connector and the second connector is arranged to be fixed to the outer cylinder inside the outer cylinder with an outer cylinder having an opening on one end side, A flow channel cylinder made of a rigid body in which the liquid flows inside, and a valve portion that fits on one end side of the outer cylinder, surrounds the periphery of the flow channel cylinder, and connects the valve portion to one end side of the outer cylinder And an elastic valve member provided with an elastic portion that urges toward the valve, and the non-fitted state of the valve portion of the elastic valve member on each of the first connector side and the second connector side To close the inside of the outer cylinder, and open in the fitted state to form a slit through which the flow channel cylinder inside the elastic valve member passes, and in the fitted state, the first connector side The flow path cylinder and the inside of the first connector. The channel cylindrical body of the second connector side and suddenly finds fit into each other to writing, the flow path flowing through the liquid that is formed preferably.

Here, in the tube connection structure of the present invention, the valve that is pushed into the inner surface of the outer cylinder on the first connector side and the second connector side, in the fitted state, on the other end side of the outer cylinder. It is preferable to provide a deformation receiving space recessed from the inner surface for receiving the elastic deformation portion of the portion toward the outer cylinder side. In this case, in particular, the first connector side and the second connector side are provided. In each case, it is preferable that two deformation receiving spaces are provided at respective positions on the inner surface of the outer cylinder corresponding to the opening direction of the slit.

Further, in the tube connection structure of the present invention, the opening of the outer cylinder on the first connector side is provided with one or more inward projections protruding toward the inner side of the outer cylinder, and on the second connector side. The outer cylinder has an opening on one end side of the outer cylinder and extends from one end side to the other end side of the outer cylinder to fit the first connector and the second connector together. It is preferable to provide one or more guide groove portions in which the direction protrusions enter and slide.
In this case, it is preferable that the guide groove has at least one bent or curved portion at the other end of the outer cylinder on the second connector side.

By the way, in the tube connection structure of this invention, the front-end | tip of the 1st connector formed by the said valve part of the said elastic valve member on the 1st connector side, and the one end side part of the said outer cylinder in the said non-fitting state It is preferable that each of the front surface of the second connector formed by the surface and the valve portion of the elastic valve member on the second connector side and the one end side portion of the outer cylinder is a flat surface. .

According to the tube connection structure of the present invention, in the non-fitted state, each of the front end surface facing the second connector of the first connector and the front end surface facing the first connector of the second connector Both of the surface areas of the first connector and the second connector are in a non-fitted state by disinfecting or disinfecting the front end surface of the first connector and the front end surface of the second connector. Since there are no recesses that make it difficult to remove the liquid, it is possible to easily and reliably disinfect the tip surfaces, and also to easily and reliably wipe off the liquid and foreign matter adhering to the tip surfaces. it can.

Also, here, a pair of annular seal projections projecting from the opposing surfaces are provided on the opposing surfaces of the annular valve body and the other end portion of the inner cylinder, and in the non-fitted state, Since the front end surface of one connector and the front end surface of the second connector are both flat surfaces other than the annular seal convex portion, the first connector and the second connector are not fitted. Therefore, since there is no recess that makes it difficult to disinfect or remove the liquid on the front end surface of the first connector and the front end surface of the second connector, the front end surface of the first connector can be easily and reliably disinfected. In addition, liquid and foreign matter adhering to the tip surface can be easily and reliably wiped off.

Further, here, in the non-fitted state, the front end surface of the first connector is formed by the annular valve body and the communication portion at the opening on the other end side of the outer cylinder, and the second connector The front end surface of the inner cylinder is formed by the inner valve body and the other end side portion of the inner cylinder on the other end side of the inner cylinder. A surface that is difficult to dispose and remove liquid or the like is not formed, and therefore, disinfection and wiping of liquid and foreign matter can be easily performed.
As a result, the tube connection structure of the present invention can be used in a clean state when connecting the first connector and the second connector.

Here, in the fitting state of the first connector and the second connector, the sealing performance at the contact portion thereof is a pair of annular rings provided on the opposing surfaces of the annular valve body and the other end portion of the inner cylinder. Of the seal convex portions, at least one annular seal convex portion made of an elastic material is secured by being crushed. And as a result, when the first connector and the second connector are fitted together, the annular seal protrusions are brought into contact with each other and crushed before each of the annular valve body and the inner valve body is completely opened. Before the first connector and the second connector communicate with each other, it is possible to ensure the liquid tightness at the connecting portion.

In addition, here, in the fitted state of the first connector and the second connector, the restoring force of the elastic member in the compressed posture on each of the first connector side and the second connector side separates the connectors from each other. In addition, in the fitted state, any slit provided in the movable valve body on each of the first connector side and the second connector side is formed on the back surface of the movable valve body. Since the flow channel cylinder on the side is abutted and spreads to one end side of the outer cylinder, the elasticity constituting the movable valve body to prevent liquid leakage in the movable valve body in a non-fitted state Even when the required hardness against the liquid flowing through the tube is ensured by increasing the hardness of the material, the first connector can be used with a smaller force than the conventional tube connection structure described in Patent Document 2. The It can be removed from the second connector.

Moreover, in this tube connection structure, when fitting the first connector and the second connector, the valve body is not folded as in the conventional tube connection structure, and each of the slits of each movable valve body, Since it is pushed and spread by each channel cylinder, the first connector can be easily attached to the second connector.
Also, here, each movable valve body is pushed into the other end side of each outer cylinder by only one operation of pushing either one of the first connector or the second connector into the other, The respective slits provided with the movable valve bodies are in contact with the respective flow path cylinders and are spread out, and the flow path cylinders communicate with each other.
Therefore, according to the tube connection structure of the present invention, it is possible to easily attach and remove the first connector and the second connector without requiring a large force, thereby realizing excellent operability.

Further, here, in the fitted state between the first connector and the second connector, both the restoring force of the elastic portion of the compression posture of each elastic valve member on the first connector side and the second connector side are those connectors. In the fitted state, the slits provided in the respective valve portions of the respective elastic valve members on the first connector side and the second connector side, respectively, Each of the flow cylinders disposed inside the elastic portion of the elastic valve member penetrates and the flow cylinders fit into each other, thereby forming a flow path there.
Therefore, in order to prevent liquid leakage from the slit of the valve part in a non-fitted state, the hardness of the elastic material constituting the valve part is increased to ensure the required pressure resistance against the liquid flowing through the tube. Even if it exists, a 1st connector can be removed from a 2nd connector with force small compared with the conventional tube connection structure described in patent document 3. FIG.

Further, in this tube connection structure, when fitting the first connector and the second connector, without causing the “valve” to be folded, as in the conventional tube connection structure described in Patent Document 3, Each valve part pushed into the other end side of the outer cylinder expands toward the outer cylinder side and elastically deforms. For example, the elastic deformation part of the valve part enters the deformation receiving space provided on the inner surface of the outer cylinder. As a result, the slits of the respective valve portions are opened, and the respective flow path cylinders penetrate therethrough. Therefore, the first connector can be easily attached to the second connector.
As a result, according to the tube connection structure of the present invention, it is possible to easily attach and remove the first connector and the second connector without requiring a large force, and to realize excellent operability. it can.

In addition, in the present invention, in the fitted state, the liquid from the tube flows only through the flow channel cylinders fitted to each other, and comes into contact with the elastic valve member around the flow channel cylinders. Therefore, it is possible to suppress the liquid itself and the residual / attachment of components contained in the liquid to the elastic valve member made of an elastic material to which the liquid adheres more easily than the rigid body. Thus, it is possible to effectively eliminate the possibility of incurring sanitary problems due to adhesion of liquids and the like.

It is sectional drawing in alignment with the axial direction of a tube which shows 1st Embodiment of the tube connection structure of this invention in the fitting state of a 1st connector and a 2nd connector. It is a figure similar to Fig.1 (a) (b) which shows the tube connection structure of Fig.1 (a) (b) in the non-fitting state of a 1st connector and a 2nd connector. It is a perspective view which shows the tube connection structure of Fig.1 (a) in the state which decomposed | disassembled each structural member. It is a perspective view at the time of seeing the tube connection structure of the disassembled state shown in FIG. 3 from a different direction. FIG. 5 is a development view of the outer surface of the inner cylinder showing guide groove portions provided in the inner cylinder of the tube connection structure of FIGS. It is sectional drawing in alignment with the axial direction of a tube which shows 2nd Embodiment of the tube connection structure of this invention in the non-fitting state of a 1st connector and a 2nd connector. It is a perspective view which shows the 1st connector which the tube connection structure of FIG. 6 provides in the state which decomposed | disassembled each structural member. It is a figure similar to FIG. 6 which shows the motion of each structural member at the time of fitting the 1st connector and 2nd connector of the tube connection structure of FIG. It is the same figure as FIG. 6 which shows the tube connection structure of FIG. 6 in the fitting state of a 1st connector and a 2nd connector. It is a perspective view which shows each of the outer cylinder which each of the 1st connector and 2nd connector of the tube connection structure of FIG. 6 has taken out from the tube connection structure. FIG. 11 is a development view of the outer surface of the outer cylinder showing guide groove portions provided in the outer cylinder shown in FIG. 10 and modifications thereof. It is sectional drawing in alignment with the axial direction of a tube which shows 3rd Embodiment of the tube connection structure of this invention in the non-fitting state of a 1st connector and a 2nd connector. It is the same figure as FIG. 12 which shows the tube connection structure of FIG. 12 in the fitting state of a 1st connector and a 2nd connector. It is sectional drawing which follows the aa line | wire of FIG. 12, and the bb line | wire of FIG. It is the same figure as Fig.14 (a) which shows the modification of the deformation | transformation receiving space provided in the inner surface of the outer cylinder by the side of the 1st connector of the tube connection structure of FIG. It is a perspective view which shows each of the outer cylinder which each of the 1st connector and 2nd connector of the tube connection structure of FIG. 12 has taken out from the tube connection structure. FIG. 17 is a development view of the outer surface of the outer cylinder, showing a guide groove provided in the outer cylinder shown in FIG. 16 and a modification example thereof. It is sectional drawing which follows the axial direction of a tube which shows the conventional tube connection structure. It is sectional drawing similar to FIG. 18 which shows the state which removed the 1st connector of the tube connection structure of FIG. 18 from the 2nd connector.

<First Embodiment>
A first embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes, for example, urine, blood, ascites / pleural effusion, bile, gastrointestinal fluid, surgical field exudate, surgical field cleaning fluid, cerebrospinal fluid drainage fluid, peritoneal dialysis fluid, and other fluids. The first connector provided at the end of one of the two tubes (not shown) for medical and welfare where the fluid flows, and 11 in the figure is provided at the end of the other tube. The 2nd connector which can be fitted in connector 1 is shown, respectively.
And here, the connection structure of the tube used for the living body for connecting the two tubes as the urinary catheter for guiding the urine discharged from the patient to the urine storage bag is, for example, the first on the patient side. One connector 1 and the second connector 11 on the urine storage bag side (not shown) are configured.

Here, as shown in FIG. 1, the first connector 1 fitted to the second connector 11 includes, for example, an outer cylinder 2 having a cylindrical shape whose inner and outer diameters are larger than those of the one tube, Inside the outer cylinder 2, one end side of the outer cylinder 2 parallel to the axial direction of the outer cylinder 2 (right side in FIG. 1, left and right refer to the left and right when FIG. 1 is viewed in the correct direction of reference numerals. 1 extends to the opening 2a on the other end side (the left side in FIG. 1) from the right side with the first connector 1 and the left side with the second connector 11 in FIG. The outer cylinder 2 is connected to the outer cylinder 2 here, and is provided between the outer cylinder 2 around the communication section 3 and made of a rubber material, a resin material, or other elastic material. An annular valve body 4 that is slidable in the axial direction and, for example, the back surface of the annular valve body 4 (the right side surface in FIG. 1). A rigid support member 5 provided along the first elastic body 6 and a first elastic body 6 such as a coil spring that urges the annular valve body 4 toward the other end side of the outer cylinder 2 via the rigid support member 5. Have.
Here, one end side of the outer cylinder 2 is connected to one tube via a tube connecting member 7 attached to one end side of the outer cylinder 2 of the first connector 1, and this tube connecting member 7 is connected to one tube. A tubular portion having an outer surface formed with a plurality of tapered steps to be frictionally engaged with the end portion, and a disk-shaped portion having a larger outer diameter than the tubular portion. .

Further, in the illustrated embodiment, the second connector 11 is connected to one end side (left side in FIG. 1), the other tube is indirectly connected, for example, and to the other end side (right side in FIG. 1). An inward flange portion 12 a is formed, a cylindrical inner cylinder 12 having an outer diameter slightly smaller than the inner diameter of the outer cylinder 2, and a central axis of the inner cylinder 12, For example, a cap-shaped inner valve body 13 made of an elastic material similar to the annular valve body 4 and the inner valve body 13 are urged toward the other end side of the inner cylinder 12. This also comprises a second elastic body 14 which is a coil spring. The second connector 11 is attached to one end of the inner cylinder 12 and a tubular portion having an outer surface formed with a plurality of tapered steps inserted into the end of the other tube and frictionally engaging the end. In addition, the tube connecting member 15 including a hollow truncated cone portion whose inner and outer diameters gradually increase toward the inner cylinder 12 can be further provided.

Such a tube connection structure has an inward flange portion that is the other end side portion of the inner cylinder 12 that enters the inner side of the outer cylinder 2 in the fitted state of the first connector 1 and the second connector 11 shown in FIG. While 12a contacts the annular valve body 4 of the first connector 1, the annular valve body 4 is pushed into the outer cylinder 2 against the urging force of the first elastic body 6, and the second connector 11 The communicating portion 3 that contacts the inner valve body 13 penetrates the inside of the inward flange portion 12 a and pushes the inner valve body 13 into the inner cylinder 12 against the urging force of the second elastic body 14. become.
Thereby, each of the annular valve body 4 and the inner valve body 13 is opened, and the liquid from one tube is, for example, one end from the tube connecting member 7 of the first connector 1 as indicated by an arrow in FIG. Flowing through the outer cylinder 2 and the inner cylinder 12 and flowing into the tube connecting member 15 of the second connector 11 through the flow hole 3b provided in the side wall of the communication portion 3 having a circular tube shape sealed by the bottom wall 3a. Thus, the liquid can be passed through the first connector 1 and the second connector 11 to the other tube.

On the other hand, when the first connector 1 is detached from the second connector 11, the first connector 1 and the second connector 11 are not fitted to each other. As shown in FIG. 3, the annular valve body 4 that has been pushed into the outer cylinder 2 by the inner cylinder 12 in the above-mentioned fitted state is based on the restoring force of the first elastic body 6 and the other end side of the outer cylinder 2. When the annular valve body 4 is fitted between the bottom wall 3a of the communication part 3 and the outer cylinder 2, the opening 2a on the other end side of the outer cylinder 2 is sealed.
In addition, here, the inner valve body 13 that has been pushed into the inner cylinder 12 by the communication portion 3 in the above-mentioned fitted state is caused by the restoring force of the second elastic body 14 that is released from the compressed posture. While being displaced toward the inside of the inward flange portion 12a on the other end side, the other end side of the inner cylinder 12 is sealed by fitting inside the inward flange portion 12a.
As a result, each of the annular valve body 4 and the inner valve body 13 is closed, and leakage of the liquid flowing through the tube can be prevented.

Here, in the present invention, when the first connector 1 and the second connector 11 are fitted together, the inward flange of the annular valve body 4 that faces the inward flange portion 12a that is the other end side portion of the inner cylinder 11 is provided. As shown in an exploded perspective view in FIG. 3, an annular seal convex portion 4 p protruding from the facing surface 4 s is provided on the facing surface 4 s with the portion 12 a and the other end portion of the inner cylinder 12, here an inward flange As shown in the exploded perspective view of the portion 12a facing the annular valve body 4 in FIG. 4 in an exploded perspective view when viewed from different directions, the fitting state shown in FIG. Thus, an annular seal convex portion 18p that contacts the annular seal convex portion 4p of the annular valve body 4 over the entire circumference is provided, and at least one of the pair of annular seal convex portions 4p, 18p, for example, the annular seal of the annular valve body 4 Convex 4p , To form an elastic material.

According to this, in the fitting state shown in FIG. 1, at least one of the annular seal convex portions 4p and 18p that are in contact with each other over the entire circumference is crushed, and the first connector 1 and the second connector 11 are crushed. The liquid flow path formed inside in the fitted state is surely sealed at the contact portion of the annular seal convex portions 4p, 18p, so that the annular seal convex portions 4p, 18p are moved to the outside. Liquid leakage can be effectively prevented. In addition, in this configuration, when the first connector 1 and the second connector 11 are fitted together, the annular seal protrusions 4p and 18p are pressed against each other before the annular valve body 4 and the inner valve body 13 are opened. Since it will be crushed, before the flow of the liquid at the time of the connection of the 1st connector 1 and the 2nd connector 11, the liquid-tightness in those connection parts can be ensured.

Further, in FIG. 1A, the vertices of the annular seal convex portions 4p and 18p are in contact with each other and are crushed. However, as shown in FIG. It is good also as a structure arrange | positioned in the position mutually contact | abutted so that may become a step difference. In this way, the annular seal convex portions 4p, 18p are arranged at positions where they are in contact with each other so that the annular seal convex portions 4p, 18p are different from each other, so that the space defined by the annular seal convex portions 4p, 18p and the communication portion 3 can be further increased. Thus, it is possible to prevent the liquid from being accumulated in the space and from being scattered when the connector is detached.

Further, in this embodiment, in the non-fitted state shown in FIG. 2, the opposed surface 4 s of the annular valve body 4 that is urged by the first elastic body 6 and is located in the opening 2 a on the other end side of the outer cylinder 2. By positioning the surface portion excluding the formation region of the annular seal convex portion 4p and the outer surface of the bottom wall 3a of the communicating portion 3 on substantially the same plane, the opening 2a on the other end side of the outer cylinder 2 A surface region other than the annular seal convex portion 4p of the distal end surface S1 of the first connector 1 formed by the facing surface 4s of the annular valve body 4 and the outer surface of the bottom wall 3a of the communication portion 3 is defined as a flat surface.
In addition, here, in the non-fitted state shown in FIG. 2, the outer surface of the inner valve body 13 that is urged by the second elastic body 14 and fitted inside the inward flange portion 12 a of the inner cylinder 11, By positioning the surface portion of the facing surface 12s of the inward flange portion 12a excluding the formation area of the annular seal convex portion 18p on substantially the same plane, the inner valve body 13 is disposed on the other end side of the inner cylinder 12. The tip surface S2 of the second connector 11 formed by the outer surface and the facing surface 12s of the inward flange portion 12a is also a flat surface in a surface region other than the annular seal convex portion 18p.
That is, in the non-fitted state shown in FIG. 2, the front surface S1 of the first connector 1 that faces the second connector 11 and the front surface S2 of the second connector 11 that faces the first connector 1 respectively. Both areas were substantially flat.

Since neither of the front end surfaces S1 and S2 of the first connector 1 and the second connector 11 formed as described above has a concave portion recessed inward as in the prior art, the first connector 1 is After the two connectors 11 are detached and brought into the non-fitted state shown in FIG. 2, the liquid and foreign matter adhering to the front end surfaces S1 and S2 of the connectors 1 and 11 can be easily and without remaining with a cloth or the like. It can be wiped off reliably, and the subsequent disinfection of the tip surfaces S1, S2 by application of the drug can be performed easily and reliably.

In addition, in this tube connection structure, the front end surfaces S1, S2 of the first connector 1 and the second connector 11 are not located inside the outer cylinder 2 or the inner cylinder 12, and the outer cylinders 2 to Since it is exposed to the other end side of the inner cylinder 12, removal of the liquid adhering to the tip surfaces S1 and S2 and disinfection of the tip surfaces S1 and S2 can be performed more easily and reliably.
From such a viewpoint, preferably, the surface region of the tip surface S1 of the first connector 1 other than the annular seal convex portion 4p is substantially flush with the end surface on the other end side of the outer tube 2 as shown in FIG. To be located.

Here, in the illustrated tube connection structure, of the pair of annular seal protrusions 4p, 18p, the annular seal protrusion 4p is formed integrally with the annular valve body 4. On the other hand, the annular seal protrusion 18p is formed separately and is formed by bonding or fusing to the inner cylinder 12. However, the inner cylinder 12 and the annular seal protrusion 18p can be integrally formed.
In the present invention, although not shown in the drawings, the annular valve body is provided with an annular seal convex portion as a separate ring-shaped member, for example, using a known adhesive, or fitting into a recess provided in the annular valve body. It can also be provided by attachment.
Providing the annular seal convex portion as a member separate from the annular valve body and the inner cylinder in this way can form the annular seal convex portion with a desired material regardless of the material of the annular valve body and the inner cylinder, Thereby, it is preferable in that the sealing performance as expected can be exhibited by the annular seal convex portion.

Further, here, in the non-fitted state shown in FIG. 2, the protruding height H of each annular seal convex portion 4p, 18p from the opposing surface 4s of the annular valve body 4 or the opposing surface 12s of the inner cylinder 12 is In a state where one connector 1 and the second connector 11 are fitted, a pair of annular seal convex portions 4p and 18p are in contact with each other and crushed so as to be substantially lost, specifically 0.5 mm. It is preferable that the thickness is 1.5 mm. Thereby, in this fitting state, the opposing surface 4s of the annular valve body 4 and the opposing surface 12s of the inner cylinder 12 come closer to each other, and the sealing performance there can be greatly enhanced.
When the protrusion height H is less than 0.5 mm, there is a risk of liquid leakage in the fitted state between the first connector 1 and the second connector 11, and the protrusion height H is If it exceeds 1.5 mm, it becomes difficult to wipe off the liquid adhering to the tip surfaces S1, S2 of the first connector 1 to the second connector 11, and in particular, the inner side and the outer side of the annular seal convex portion. Wiping residue may occur at the edge.

Further, it is preferable that the width W of any of the annular seal convex portions 4p, 18p is 0.5 mm to 1.5 mm. When the width W of the annular seal protrusion is less than 0.5 mm, the required sealing performance cannot be ensured, and there is a risk that liquid will leak due to a gap. On the other hand, when the width W is greater than 1.5 mm There is a concern that the step of the annular seal convex part with the surrounding surface part becomes large and the merit of easy wiping of the liquid cannot be obtained sufficiently due to the flat end surfaces S1 and S2. This is because that.

Further, it is preferable that the inner diameter D of each of the annular seal convex portions 4p and 18p is 8 mm to 10 mm. When the inner diameter D of the annular seal convex portions 4p and 18p is less than 8 mm, the surface portion surrounded by the annular seal convex portions 4p and 18p becomes narrow, and it becomes difficult to wipe the surface portion with, for example, the thumb. Is greater than 10 mm, the distance between the outer peripheral edge of the tip surfaces S1 and S2 and the annular seal convex parts 4p, 18p is short, so that it is difficult to wipe between the outer peripheral edge and the annular seal convex parts 4p, 18p. Become.

In the illustrated embodiment, each of the annular seal convex portions 4p and 18p is annular, but the annular seal convex portions are respectively in the annular valve body 4 and the inner valve body 13 in the fitted state shown in FIG. As long as the shape can surround and seal the inside of the inward flange portion 12a and the inner peripheral edge of the annular valve body 4 through which the liquid passes by opening, the shape is limited to the illustrated form. It is not a thing.

By the way, as shown in FIGS. 3 and 4, for example, as shown in FIGS. 3 and 4, the communication part 3 that provides communication of one tube to the outer cylinder 2 seals one end of the main body part in a circular tube shape with a bottom wall 3a, and One or more flow holes 3b extending in the axial direction can be provided in part of the circumferential direction of the side wall of the part, and in this case, the liquid from the tube connecting member 7 is connected to the other end of the communication part 3 It passes through the opening part of this and flows into the communication part 3, and it flows out of the communication part 3 from the said flow hole 3b. In the illustrated embodiment, the communication portion 3 is attached to the above-described disk-shaped portion of the tube connecting member 7 and functions as a disk support that supports the first elastic body 6 disposed around the main body portion. The base 3c is provided at the other end of the main body.

In the communication part 3 having such a configuration, the first elastic body 6 disposed around is a coil spring as shown in the figure, and the first elastic body 6 is in the fitted state shown in FIG. The helically wound windings that constitute the coil springs are compressed in the axial direction of the communication portion 3 to contact each other, and the gap between the windings is closed, while the non-fitting shown in FIG. It is preferable to set the dimensional shape of the first elastic body 6, the communication portion 3, and other constituent members so that the state is restored and a gap between the windings is opened.
According to this, when the liquid flowing in the tube, mostly discharged from the living body, is mixed with, for example, urinary calculus or other particles or powder that may be contained in urine, FIG. When the rigid support member 5 surrounds the first elastic body 6 in a compressed posture at the one end side portion of the outer cylinder 2 in the fitted state shown in FIG. Since the clogging between the rigid support member 5 and the base portion 3c of the communication portion 3 can be prevented, the opening / closing operation of the annular valve body 4 with respect to the opening portion 2a of the outer cylinder 2 can be always good. it can.

Further, here, the inner valve body 13 of the second connector 11 has an elastic body accommodating portion 13a for accommodating the second elastic body 14 by, for example, recessing the surface on the second elastic body 14 side as shown in the figure. It is preferable that the second elastic body 14 is disposed in contact with the bottom portion of the elastic body accommodating portion 13a. Thereby, in the fitting state shown in FIG. 1, since the second elastic body 14 is accommodated in the elastic body accommodating portion 13a, the liquid flowing through the first connector 1 and the second connector 11 of the second elastic body 14 and To prevent the liquid such as urine from adhering to the second elastic body 14, and to prevent clogging of the urinary calculus and the like to the second elastic body 14 and the elastic body accommodating portion 13a. Can do.

In FIG. 1, each of the first elastic body 6 and the second elastic body 14 is configured by a coil spring, but at least one of the first elastic body 6 and the second elastic body 14 is not shown. However, other than the coil spring, an elastic body capable of urging the annular valve body 4 or the inner valve body 13 toward the other end side of the outer cylinder 2 or the inner cylinder 12, for example, a cylindrical shape, or an inner and outer surface bellows A cylindrical rubber member or the like formed in a shape can be used.
Although not shown in the figure, the first elastic body and the annular valve body, and the second elastic body and the inner valve body can be formed integrally with each other to form a so-called mechanical spring or the like. .

In the illustrated embodiment, the rigid support member 5 is provided along the back surface of the annular valve body 4 as shown in FIGS. 1 and 2, and the first elastic body 6 is interposed via the rigid support member 5. By energizing the annular valve body 4, the annular valve body 4 that can be formed of an elastic material based on the back-up by the rigid support member 5 made of a rigid material from the back side of the annular valve body 4. It is possible to reliably urge the entire back surface of the first member with the first elastic body 6 to effectively prevent liquid leakage in a non-fitted state. Further, the rigid support member 5 can suppress deformation of the annular valve body 4 and prevent the first elastic body 6 from jumping out of the annular valve body 4.

When such a 1st elastic body 6 and the 2nd elastic body 14 are provided, after removing the 1st connector 1 from the 2nd connector 11, in the non-fitting state shown in FIG. Since the urging force of the second elastic body 14 and the annular valve body 4 and the inner valve body 13 respectively seal the other end side of the outer cylinder 1 and the other end side of the inner cylinder 11, Attachment and removal of the first connector 1 and the second connector 11 can be used repeatedly.
This is particularly true when the tube connection structure is provided in the middle of a urinary catheter where one end is placed in the patient's bladder and the other end is attached to the urine storage bag. Because it can be used separately from the patient, the patient can move away from the urine storage bag and perform so-called rehabilitation and bathing, etc., and urine backflow into the bladder due to the position and condition of the urine storage bag This is preferable in that the risk of developing a urinary tract infection can be eliminated.

On the other hand, when the first connector 1 and the second connector 11 are once connected and then the first connector 1 is used without being removed from the second connector 11, the connectors 1 and 11 are always fitted together. Since it is not always necessary to provide the first elastic body 6 and the second elastic body 14 described above, in the present invention, although illustration is omitted, at least one of the first elastic body 6 and the second elastic body 14 is provided. It can be omitted.

In the tube connection structure described above, the opening 2a on the other end side of the outer cylinder 2 is used to fix the connectors 1 and 11 in a state where the first connector 1 and the second connector 11 are fitted together. In addition, as illustrated in FIG. 3, one or more, preferably two inward projecting portions 8 that protrude toward the inside of the outer cylinder 2 are provided, and the outer surface of the inner cylinder 12 is provided on the outer surface of the inner cylinder 12. As illustrated in FIGS. 3 and 4, a guide groove portion 16 that opens to the other end side of the inner cylinder 12 and extends from the other end side of the inner cylinder 12 toward the one end side is disposed on the inward protruding portion 8. Two can be provided here, corresponding to the position and number.

Here, each of the guide groove portions 16 shown in FIGS. 3 and 4 has a groove width slightly wider than the width of the inward protruding portion 8 over the entire length, as shown in the development view of the outer surface of the inner cylinder in FIG. The inner cylinder 12 is inclined from the other end side (right side in the figure) toward one end side (left side in the figure) with respect to the axial direction (left and right direction in the figure) of the inner cylinder 12 along the outer surface of the inner cylinder 12. In addition to extending in the posture, the bent portions 16a to 16c are formed at the end portion on one end side of the inner cylinder 12, and the inner cylinder 12 is bent in a convex crest on one end side.

When the inward projection 8 and the guide groove 16 are formed, the first connector 1 and the second connector 11 are fixed with each other in order to fix the first connector 1 and the second connector 11 with each other. The outer cylinder 2 is screwed into the inner cylinder 12 so as to slide from the other end side to the one end side of the inner cylinder 12 on the inner side of each of the guide groove sections 16 to be formed. When the bent portions 16a to 16c of the guide groove portion 16 are reached, the inwardly projecting portion 8 is made to have a mountain-like bent portion 16a of the guide groove portion 16 under the action of a slightly large screwing force to the outer cylinder 2. This can be done by getting over 16c.
In this guide groove portion 16, a click sound can be generated when the inward protruding portion 8 gets over the bent portions 16a to 16c, so that the user has fixed the first connector 1 and the second connector 11. The bent portions 16a to 16c function to prevent the first connector 1 from being unintentionally detached from the second connector 11 and to lock them together.

In addition to the form described above, the guide groove portion extends in parallel with the axial direction of the inner cylinder 22 and is a bent portion 26a formed at one end of the inner cylinder 22, as shown in FIG. For example, the inner tube 32 is bent at a right angle toward one side in the circumferential direction (vertical direction in the drawing) of the tube 22 or as shown in FIG. 5B, as shown in FIG. 5C. The bent portion 36a is bent toward one side in the circumferential direction of the inner cylinder 32, then further bent at the bent portion 36b, and is somewhat extended toward the other end side of the inner cylinder 32. Various extending forms, such as a terminating form, can be used.

When the guide groove portion of the form shown in FIGS. 5B and 5C is provided, the first connector 1 is pushed into the second connector 11 without twisting, and the inward projection portion 8 is inserted into the guide groove portion 26 or The inner connector 36 is slid from the other end side of the inner cylinder toward the one end side, and the first connector 1 and the second connector 11 are moved when reaching the bent portion 26a or 36a in the circumferential direction of the inner cylinder. Based on the restoring force in the axial direction of the first elastic body 6 and the second elastic body 14 which are compressed by being relatively rotated, the inward projection 8 is formed in the form shown in FIG. The guide groove 26 is frictionally engaged with the groove wall surface of the portion extending in the circumferential direction of the inner cylinder 22, and in the form shown in FIG. 5C, the other end of the inner cylinder 32 of the guide groove 36. It will fit into the part that extends toward the side, It can be respectively fixed.

However, when the tube joint structure of the present invention is provided in the middle of the urinary catheter as described above, the second connector 11 is disconnected from the first connector 1 even when the tube is pulled with a large force. If the connectors 1 and 11 are kept in the fitted state, the urinary catheter placed in the patient's bladder may be pulled out of the bladder. Moreover, the guide groove part 16 of the form shown to Fig.5 (a) from which the 2nd connector 11 shall remove | deviate from the 1st connector 1 is more preferable than the thing of another form.
In any of the guide groove portions 16, 26, 36 described above, the bent portions 16a to 16c, 26a, 36a, 36b can be curved portions (not shown).

In such a locking mechanism composed of the inwardly protruding portion and the guide groove portion, there is no portion that protrudes toward the outside of the tube connection structure. Therefore, the tube connection structure may come into contact with the patient's skin, for example. However, since it does not damage the skin, it is particularly effective when used for medical and welfare tubes.

Here, when the inward projection 8 as described above is provided in the opening 2 a of the outer cylinder 2, the first elastic body 6 is in a non-fitted state between the first connector 1 and the second connector 11. As shown in FIGS. 3 and 4, a part of the annular valve body 4, which is positioned at the opening 2 a of the outer cylinder 2 by the urging force, corresponds to a position in the circumferential direction corresponding to the position of the inward projections 8. An inwardly protruding portion 8 that protrudes inward from the opening 2a of the outer cylinder 2 is provided by providing a recessed portion 4a into which the inwardly protruding portion 8 enters. As shown in FIG. 2, the surface portion other than the seal convex portion 4 p can be positioned substantially on the same plane as the end surface on the other end side of the outer cylinder 2.

Further, the displacement of the annular valve body 4 in the outer cylinder 2 together with the rigid support member 5 due to the compression and restoration of the first elastic body 6 is always parallel to the axial direction of the outer cylinder 2 and externally. For example, two linear grooves 9 extending in parallel with the axial direction of the outer cylinder 2 are provided on the inner surface of the outer cylinder 2 as shown in FIGS. The outer circumferential surface of the member 5 extends in parallel with the axial direction of the outer cylinder 2 at each circumferential position corresponding to the linear groove 9, and is fitted into the linear groove 9 to fit in the linear groove 9. The fitting convex part 10 which slides can be provided.

By the way, in order to support the second elastic body 14 such as a coil spring while allowing the liquid flowing into the inner cylinder 12 from the outer cylinder 2 to flow, there is a gap between the inner cylinder 12 and the tube connecting member 15 as shown in FIG. As shown in FIG. 4, the annular portion sandwiched between them and the disk-shaped spring receiving portion disposed inside the annular portion are, for example, three rod-shaped at three locations in the circumferential direction. In addition to being connected by a connecting portion, an elastic body support member 17 provided with a cylindrical protrusion portion into which the cap-shaped inner valve body 13 is fitted together with the second elastic body 14 in the fitted state is provided in the spring receiving portion. it can.

In such a tube connection structure, for example, polyethylene, polypropylene, ethylene-propylene can be used as the rigid material of each component other than the annular valve body 4, the inner valve body 13, and the first and second elastic bodies 6, 14. Copolymer, polyolefin such as ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide, polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, Acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyester such as polycyclohexane terephthalate (PCT), polyether, polyether ketone (PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, Various resin materials such as polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, and other fluorine-based resins, or blends containing one or more of these, A polymer alloy or the like can be used. In addition, it is also possible to configure with various glass materials, ceramic materials, and metal materials.

On the other hand, examples of the elastic material forming the annular valve body 4 and the inner valve body 13 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, and ethylene-propylene. Various rubber materials such as rubber, hydrin rubber, urethane rubber, silicone rubber, fluoro rubber, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber Various thermoplastic elastomers such as chlorinated polyethylene and chlorinated polyethylene can be used, and one or more of these can be used in combination.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to the drawings.
In the following, elements similar to those in the tube connection structure according to the first embodiment of the present invention shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted.

Here, in the illustrated embodiment, the first connector 1 is positioned on the one end side of the cylindrical outer cylinder 62 having an opening 62a on one end side on the left side in FIG. A movable valve body 63 made of a rubber material, a resin material, or other elastic material that can be moved by sliding or the like in the axial direction of the outer cylinder 62 while being fitted in the inner surface of the outer cylinder 62; The peripheral portion of the movable valve body 63 is the rear surface (the right surface in FIG. 6). The left and right indicate the left and right when FIG. 6 is viewed in the correct direction. Specifically, in FIG. An annular rigid support member 64 that is supported from the side and is movable in the axial direction together with the movable valve body 63, and an inner side of the outer cylinder 62. Thus, it is arranged on the back side of the movable valve body 63 and the liquid flows inside. The movable valve body 63 is urged toward the opening 62a of the outer cylinder 62 via the road cylinder 5 and the rigid support member 64, for example, a coil spring or the like disposed around the flow path cylinder 65 And an elastic member 66.

In the first connector 1, the flow channel cylinder 65 is extended to the right side of FIG. 6, and the flow tube cylinder 65 is provided with a tube attachment portion 65 a to be inserted into the end of one tube. At the same time, a plurality of tapered steps for frictionally engaging the tube are formed on the outer surface of the tube mounting portion 65a, and the flow path cylinder 65 is located at the edge position on the other end side of the outer cylinder 62. An annular flange lid portion 65 b is provided extending to the outer peripheral side and fitted to the other end side of the outer cylinder 62 so as to cover the opening portion of the outer cylinder 62 on the other end side of the outer cylinder 62.

Moreover, the 2nd connector 11 has a structure substantially the same as the 1st connector 1 except the difference in the dimension shape of each structural member here.
Specifically, the illustrated second connector 11 has an outer diameter slightly smaller than the inner diameter of the outer cylinder 62 on the first connector 1 side, and the first connector 1 and the second connector 11 are fitted to each other. Sometimes the inside of the outer cylinder 62 on the first connector 1 side, and in FIG. 6, a cylindrical outer cylinder 72 having an opening 72 a on one end side on the right side, and an inner side of the outer cylinder 72 on one end side of the outer cylinder 72. The disc-shaped movable valve body 73 made of an elastic material, which can be moved in the axial direction inside the outer cylinder 72, and the peripheral portion of the movable valve body 73 are back (toward the left side in FIG. 6). A ring-shaped rigid support member 74 supported in the axial direction together with the movable valve body 73 and disposed on the back side of the movable valve body 73 on the inner side of the outer cylinder 72, so that liquid is contained inside. The movable valve body 73 is connected to the outer cylinder 72 via the flow path cylinder 75 and the rigid support member 74. It urges the one end side, which also comprises an elastic member 76 which is a coil spring.

Also in the second connector 11, the tube cylinder 75 has a tube mounting portion 75 a having an outer surface with a tapered step for attaching the end of the other tube, and the other end of the outer tube 72. It can have a flange lid portion 75b fitted to the side.

Here, in this embodiment, in each movable valve body 63 and 73 of the 1st connector 1 and the 2nd connector 11, it is a perspective view of the state which decomposed | disassembled each structural member only to the 1st connector 1 side in FIG. As shown, each of the movable valve bodies 63, 73 is provided with ring-shaped convex portions 63a, 73a projecting from the front facing the one end side of the outer cylinders 62, 72, and for example, the ring-shaped convex portions 63a, 73a. In the region surrounded by the slits 63b, 73b extending in the radial direction of the movable valve bodies 63, 73 and penetrating from the front to the back of the movable valve bodies 63, 73 are formed.

Each of the slits 63b and 73b is, as shown in FIG. 6, a pair of semi-circles in front view, for example, in a front view, in a region surrounded by the ring-shaped protrusions 63a and 73a. It is provided between the flexible wall portions 63c and 73c having a shape.
And in any of the 1st connector 1 and the 2nd connector 11, the pair of flexible wall part of each movable valve body 63 and 73 in the non-fitting state of those connectors 1 and 11 shown in FIG. The slits 63b and 73b are closed in a posture where the 63c and 73c are in contact with each other, and leakage of the liquid flowing through the tube is prevented.
Further, in the non-fitted state shown in FIG. 6, the front surface S1 of the first connector 1 that faces the second connector 11 and the front surface S2 of the second connector 11 that faces the first connector 1, respectively. Both areas were substantially flat. This makes it difficult to disinfect or remove the liquid from the front end surface S1 of the first connector 1 and the front end surface S2 of the second connector 11 when the first connector 1 and the second connector 11 are not fitted. Since there is no recess, the tip surfaces S1 and S2 can be easily and reliably sterilized, and liquid and foreign matters adhering to the tip surfaces S1 and S2 can be easily and surely wiped off. .

In fitting the first connector 1 and the second connector 11 having such a configuration, the outer cylinder 72 on the second connector 11 side is inserted inside the outer cylinder 62 on the first connector 1 side. Can only be done.
In this case, first, the movable valve body 63 on the first connector 1 side is formed by the one end side portion of the outer cylinder 72 on the second connector 11 side and the movable valve body 73 inserted inside the outer cylinder 62 on the first connector 1 side. However, as shown in FIG. 8 (a), against the biasing force of the elastic member 66 on the back surface side, the other end side of the outer cylinder 62 inside the outer cylinder 62 on the first connector 1 side (FIG. 8). Then it is pushed towards the right side.
At this time, on the first connector 1 side, from the back side of the movable valve body 63, the front end portion of the flow path cylinder 65 on the back side makes contact with the slit 63 b of the movable valve body 63. Each of the pair of flexible wall portions 63c is gradually spread toward one end side of the outer cylinder 62 under a bending deformation toward one end side (left side in FIG. 8) of the outer cylinder 62.

Next, on the first connector 1 side, the flexible wall portions 63c on both sides of the slit 63b of the movable valve body 63 being pushed and expanded as described above are bent and deformed toward one end side of the outer cylinder 62. Accordingly, as shown in FIG. 8B, the flexible wall portion 63c causes the movable valve body 73 on the second connector 11 side to resist the urging force of the elastic member 76 on the back surface side. The second connector 11 is pushed toward the other end side (left side in FIG. 8) of the outer cylinder 72.

Thereafter, when the outer cylinder 72 on the second connector 11 side is further inserted inside the outer cylinder 62 on the first connector 1 side, the movable valve body gradually enters the other end side of the outer cylinder 62 on the first connector 1 side. Each of the flexible wall portions 63c that gradually bend and deform toward the one end side of the outer cylinder 62 by the abutment of the flow path cylinder 65 on the back side to 63, the movable valve element 73 on the second connector 11 side, The movable valve body 73 on the second connector 11 side is further pushed into the other end side of the outer cylinder 72 of the second connector 11 so as to abut on the flow path cylinder 75 on the back side thereof, whereby the second connector 11 As shown in FIG. 8C, the slit 73b of the movable valve body 73 on the side is expanded to one end side (right side in FIG. 8) of the outer cylinder 72 on the second connector 11 side.

Here, since the slit 63b on the first connector 1 side is already opened larger than the slit 73b on the second connector 11 side, the outer cylinder 72 on the second connector 11 side is then connected to the first connector 1 side. When the slit 73b on the second connector 11 side is further expanded by the abutment of the flow channel cylinder 75 on the back side thereof, the movable valve on the first connector 1 side is inserted. Each flexible wall 63c of the body 63 is shown in more detail in FIG. 9 with each flexible wall 73c of the movable valve body 73 on the second connector 11 side, as shown in the fitted state of both connectors 1 and 11. Are sandwiched and engaged between each flexible wall portion 73c and the ring-shaped convex portion 73a.

Thus, in such a tube connection structure, when the first connector 1 and the second connector 11 are fitted together, the movable valve bodies 63 and 73 pushed into the other end side of the outer cylinder 62 or 72 are provided with the movable valve. The movable valve body is brought into contact with each flow tube cylinder 65, 75 fixed to each outer cylinder 62, 72 inside the outer cylinder 62, 72 provided with the bodies 63, 73 from the back side. The respective slits 63b and 73b of 63 and 73 are expanded, whereby the flow path cylinders 65 and 75 can be communicated with each other.
The “back surface of the movable valve body” as used in the present invention means that the movable valve body located inside the outer cylinder on one end side of the outer cylinder in each of the first connector and the second connector. The surface facing the other end side shall be said.

And especially in this embodiment, in the fitting state shown in FIG. 9 between the first connector 1 and the second connector 11, the respective flow path cylinders 65, 75 of the first connector 1 and the second connector 11 are: The second flexible wall 63c on the first connector 1 side and the second wall which are spaced apart from each other and are engaged with each other as described above around the gap between the flow path cylinders 65 and 75. A portion of the flow path is formed by the flexible wall portions 63c and 73c surrounded by the flexible wall portion 73c on the connector 11 side.

According to this, in addition to the flow path through which the liquid flows in the tube connection structure being formed linearly between one tube and the other tube, the movable valve bodies 63 and 73 A flow path is formed by the flexible wall portions 63c and 73c on both sides of the widened slits 63b and 73b, and the flexible wall portions 63c and 73c deformed by bending into the outer cylinders 62 and 72 are stored. Since it is not necessary to secure a large space, for example, when the inner diameters of the flow path cylinders 65 and 75 are set to a required size so that a urinary calculus or the like having a particle diameter of about 3 mm can pass therethrough. Even so, the outer diameter of the outer cylinders 62 and 72, and hence the outer diameter of the connectors 1 and 11, can be reduced, thereby making the entire tube connection structure small and easy to handle. Can do.
As a result, when the tube connection structure is provided, for example, in the middle of the urinary catheter attached to the urine storage bag, the outer diameter of the patient connected to the urine storage bag through the urinary catheter moves. The small connectors 1 and 11 are not troublesome for the patient, and the quality of life of the patient can be greatly improved. In addition, despite the small outer diameter of the connectors 1 and 11, the wide connection in the tube connection structure Since the passage can be secured, clogging of urine-derived suspended matters or the like can be effectively prevented.

It should be noted that here, the sealing properties in the part of the flow path surrounded by the flexible wall portions 63c and 73c between the flow path cylinders 65 and 75 are made of an elastic material and face each other. Although the flexible wall portions 63c and 73c can be sufficiently secured by being crushed, in this illustrated embodiment, the one end side portion of the outer cylinder 72 on the second connector 11 side is the first connector 1 side. Since the movable valve body 63 abuts on the peripheral edge portion 63d on the outer peripheral side of the ring-shaped convex portion 63a described above and crushes the peripheral edge portion 63d, it is also sealed here. The liquid can be prevented from leaking to the outside more reliably.

However, since it is not an essential configuration of the present invention that the flexible wall portions 63c and 73c of the movable valve bodies 63 and 73 form a part of the flow path in the fitted state, the illustration is omitted. For example, the channel cylinder is made longer toward the movable valve body than that shown in FIG. 6, and the other channel cylinder is inserted inside one channel cylinder in the fitted state. It is also possible to form the flow paths in the tube connection structure only with the respective flow path cylinders in the fitted state.

When the second connector 11 fitted to the first connector 1 in this way is removed from the first connector 1 and brought into the non-fitted state shown in FIG. 6, any elastic member 66 in the compressed posture is used. , 76 also acts in the direction in which the second connector 11 is detached from the first connector 1, so that the force required for such removal can be reduced, and the outer cylinder 62 on the first connector 1 side can be reduced. The outer cylinder 72 on the second connector 11 side that has entered the inside can be performed by only one operation of pulling it out in the direction of separating them.
Therefore, according to this tube connection structure, operability can be greatly enhanced.

Moreover, in this embodiment, the end part of the one end side of the outer cylinder 62 of the flow-path cylinder 65 by the side of the 1st connector 1 is the fitting state shown in FIG. Is sandwiched between a pair of flexible wall portions 63c of the movable valve body 63 on which the slit 63b is pushed and widened on the first connector 1 side, and the flow channel cylinder 65 on the second connector 11 side. The end portion on the one end side on the outer cylinder 72 side is also located between the pair of flexible wall portions 73c of the movable valve body 73 in which the slit 73b of the second connector 11 is spread.

As described above, when the respective flow path cylinders 65 and 75 are arranged so that the respective flow path cylinders 65 and 75 do not penetrate the respective movable valve bodies 63 and 73 in the fitted state, During the attachment and removal of the one connector 1 and the second connector 11, the first connector 1 side, between the outer surface of the flow channel cylinder 65 and the flexible wall 63c of the movable valve body 63, and the first The frictional force acting on each of the two connectors 11 between the outer surface of the flow path cylinder 75 and the flexible wall 73c of the movable valve body 73 is kept small under the narrow contact surface, Such attachment and removal can be made easier.

Here, at least one of the elastic members 66 and 76 as members separate from the movable valve bodies 63 and 73 on the first connector 1 side and the first connector 11 side is illustrated in addition to a coil spring. Is omitted, but an elastic member capable of urging each movable valve body 63, 73 toward each opening 62a, 72a on one end side of each outer cylinder 62, 72, for example, a cylindrical shape, or an inner and outer surface is provided. It can be set as the cylindrical rubber member etc. which were formed in bellows shape.

In the tube connection structure described above, in order to fix the connectors 1 and 11 in a state where the first connector 1 and the second connector 11 are fitted together, the outer cylinder 62 on the first connector 1 side or the second connector Of the outer cylinder 72 on the second connector 11 side, the opening 72a on one end side of the outer cylinder 2 on the first connector 1 side having the larger inner and outer diameters is directed toward the inside of the outer cylinder 62 as shown in a perspective view in FIG. As shown in FIG. 10, one or more, preferably two inward projections 67 that face each other are provided, and the outer surface of the outer cylinder 72 on the second connector 11 side having a smaller inner and outer diameter is provided. The guide groove portion 77 that opens to one end side of the outer cylinder 72 and extends from one end side to the other end side of the outer cylinder 72 corresponds to the position and number of the inward projections 67, Two can be provided here.

Here, each of the guide groove portions 77 shown in FIG. 10 is slightly smaller than the width of the inward protruding portion 67 over the entire length, as shown in FIG. 11A by developing the outer surface of the outer cylinder 72 of the second connector 11. With a wide groove width, from the one end side (right side in FIG. 11) of the outer cylinder 72 toward the other end side (left side in FIG. 11), the axial direction of the outer cylinder 72 along the outer surface of the outer cylinder 72 (left and right in FIG. 11). The outer cylinder 72 is inclined to the other end of the outer cylinder 72 by forming three bent portions 77a to 77c at the other end of the outer cylinder 72. It will be bent.

When such inward projections 67 and guide grooves 77 are formed, each of the inward projections 67 is associated with each other in order to fix the first connector 1 and the second connector 11 in a mutually fitted state. In order to slide the outer tube 72 on the second connector 11 side toward the other end side from the one end side of the outer tube 72 on the second connector 11 side inside each guide groove portion 77 to be While being screwed into the outer cylinder 62, when the inward projection 67 reaches the bent portions 77a to 77c of the guide groove 77, a slightly large screw is inserted into the outer cylinder 62 on the first connector 1 side. Under the action of force, the inward projection 67 can be carried out by getting over the mountain-shaped bent portions 77a to 77c at the end of the guide groove 77.
In this guide groove portion 77, when the inward projection portion 67 gets over the bent portions 77a to 77c, a click sound can be generated, so that the user has fixed the first connector 1 and the second connector 11. The bent portions 77a to 77c also function to prevent the first connector 1 from being unintentionally detached from the second connector 11 and to lock them together.

In forming such a guide groove 77, when the inward projection 67 is moved over the bent portions 77a to 77c of the guide groove 77 and locked, the first connector 1 side and the second connector 67 are formed. The slits 63b and 73b provided in the respective movable valve bodies 63 and 73 on the connector 11 side are oriented so as to intersect each other at approximately 90 ° when viewed in the flow direction of the liquid flowing in the tube connection structure. It is preferable to select the arrangement position and length of the guide groove portion 77 in that the sealing performance at the flexible wall portions 63c and 73c engaged with each other can be greatly increased.

In addition to the form described above, the guide groove portion extends in parallel with the axial direction of the outer cylinder 82 on the second connector 11 side, as shown in FIG. For example, the bent portion 87a is bent at a right angle toward one side in the circumferential direction (vertical direction in FIG. 11) of the outer cylinder 82, or as shown in FIG. 11 (c), as shown in FIG. 11 (b). As shown, it extends parallel to the axial direction of the outer cylinder 92 on the second connector 11 side, bends toward one side in the circumferential direction of the outer cylinder 92 at the bent portion 97a, and further bends at the bent portion 97b. Various extending forms such as a form that extends somewhat toward the one end side of the outer cylinder 92 and terminates can be employed.

When the guide groove portion shown in FIGS. 11B and 11C is provided, the second connector 11 is pushed into the first connector 1 without being twisted, and the inwardly protruding portion 67 is inserted into the guide groove portion 87 or The inner connector 97 is slid from one end side to the other end side of the outer cylinder, and when the bent portion 87a or 97a in the circumferential direction of the outer cylinder is reached, the first connector 1 and the second connector 11 are connected. In the form shown in FIG. 11 (b), the inward projection 67 is formed in the guide groove portion 87 based on the restoring force in the axial direction of each of the elastic members 66 and 76 compressed and compressed by relative rotation. In this embodiment, the guide groove portion 97 extends toward one end side of the outer cylinder 92 in the form shown in FIG. 11C. Will fit into the part It can be fixed, respectively.

However, when the tube joint structure of the present invention is provided in the middle of the urinary catheter as described above, the second connector 11 is disconnected from the first connector 1 even when the tube is pulled with a large force. If the connectors 1 and 11 are kept in the fitted state, the urinary catheter placed in the patient's bladder may be pulled out of the bladder. In addition, the guide groove 77 of the form shown in FIG. 11 (a) in which the second connector 11 can be detached from the first connector 1 is preferable to the other form.
In any of the guide groove portions 77, 87, 97 described above, the bent portions 77a to 77c, 87a, 97a, 97b can be curved portions (not shown).

In such a locking mechanism composed of the inwardly protruding portion and the guide groove portion, there is no portion that protrudes toward the outside of the tube connection structure. Therefore, the tube connection structure may come into contact with the patient's skin, for example. However, since it does not damage the skin, it is particularly effective when used for medical and welfare tubes.

Further, here, when the inward projection 67 as described above is provided in the opening 62 a of the outer cylinder 62, the first connector 1 is in a non-fitted state between the first connector 1 and the second connector 11. FIG. 7 shows a part of the movable valve body 63, which is located at the opening 62a of the outer cylinder 62 by the urging force of the elastic member 66, in the circumferential direction corresponding to the arrangement position of each inward projection 67. As shown, by providing a recessed portion 63d into which the inward protruding portion 67 enters, an inward protruding portion 67 that protrudes inward at the opening 62a of the outer cylinder 62 is provided. As shown in FIG. 6, the front surface excluding the formation area of the portion 63 a can be positioned substantially on the same plane as the end surface on the other end side of the outer cylinder 62.

Further, for example, on the first connector 1 side, the displacement of the movable valve body 63 in the outer cylinder 62 together with the rigid support member 64 caused by the compression and restoration of the elastic member 66 is always in the axial direction of the outer cylinder 62. As shown in FIG. 7, for example, two linear grooves 68 extending in parallel with the axial direction of the outer cylinder 62 are provided on the inner surface of the outer cylinder 62. At the same time, the outer circumferential surface of the rigid support member 64 extends in parallel with the axial direction of the outer cylinder 62 at each circumferential position corresponding to the linear groove 68, and is fitted into the linear groove 68 to It is possible to provide a fitting protrusion 69 that slides in the straight groove 68. Thereby, the rigid support member 64 can easily lower the movable valve body 63. In the illustrated embodiment, the rigid support member 64 is provided along the back surface of the movable valve body 63 as shown in FIGS. 6 and 7, and the first elastic body 66 is interposed via the rigid support member 64. By urging the movable valve body 63, the movable valve body 63 that can be formed of an elastic material based on the back-up by the rigid support member 64 made of a rigid material from the back side of the movable valve body 63. It is possible to reliably prevent the liquid leakage in the non-fitted state by reliably urging the entire back surface of the first elastic body 66 with the first elastic body 66. Further, the rigid support member 64 can suppress deformation of the movable valve body 63 and prevent the first elastic body 66 from jumping out of the movable valve body 63.
The same applies to the second connector 11 side.

In such a tube connection structure, a rigid material such as polyethylene, polypropylene, an ethylene-propylene copolymer, ethylene-acetic acid is used as the material of each of the constituent members other than the movable valve bodies 63, 73 and the elastic members 66, 76. Polyolefin such as vinyl copolymer (EVA), polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide, polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate Acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene Polyester such as cyclohexane terephthalate (PCT), polyether, polyetherketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, Various resin materials such as polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, and other fluororesins, or blends, polymer alloys, etc. containing one or more of these are used. be able to. In addition, it is also possible to configure with various glass materials, ceramic materials, and metal materials.

On the other hand, examples of the elastic material forming the movable valve bodies 63 and 73 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber. , Various rubber materials such as urethane rubber, silicone rubber, fluoro rubber, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber, chlorine Various thermoplastic elastomers such as fluorinated polyethylene can be mentioned, and one or more of these can be mixed and used.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to the drawings.
In the following, elements similar to those in the tube connection structure according to the first embodiment of the present invention shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted.

Here, in the illustrated embodiment, the first connector 1 has one end side (left side in FIG. 12). The left and right indicate the left and right when FIG. 12 is viewed in the correct direction. The first connector 1 is on the right and the second connector 11 is on the left.) With an opening 202a in the outer cylinder 202, for example, inside the outer cylinder 202 and the outer cylinder 202. The liquid flows through the inside, which is also, for example, a cylindrical channel cylinder 203, a valve portion 204 a that fits inside one end of the outer cylinder 202, and the channel cylinder An elastic valve member 204 having an elastic portion 204b that urges the valve portion 204a toward one end of the outer cylinder 202 in a posture that surrounds the periphery of 203.

Note that the flow path cylinder 203 is extended to the right side of FIG. 12 beyond the edge position on the other end side (right side in FIG. 12) of the outer cylinder 202, for example, as shown in FIG. A tube mounting portion 203a having an outer surface formed with a plurality of tapered steps inserted into the end portion of one tube and frictionally engaging the end portion is provided, and at the end position on the other end side of the outer tube 202 The outer cylinder 202 is fitted on the other end side of the outer cylinder 202 so as to extend from the outer surface of the channel cylinder 203 to the outer peripheral side and to cover the opening on the outer peripheral side of the channel cylinder 203 on the other end side of the outer cylinder 202. It can have an annular flange lid 203b.

Moreover, the 2nd connector 11 has a structure substantially the same as the 1st connector 1 except the difference in the dimension shape of each structural member here.
Specifically, the illustrated second connector 11 has an opening 212a on one end side (right side in FIG. 12), and has an inner and outer diameter smaller than the outer cylinder 202 on the first connector 1 side, and A thick outer cylinder 212, for example, and the inner cylinder 212 is fixed to the outer cylinder 212, and the liquid flows inside. Surrounding the body 213, the valve portion 214a fitted inside the one end side of the outer cylinder 212, and the flow path cylinder body 213, the valve portion 214a is urged toward one end side of the outer cylinder 212. And an elastic valve member 214 having an elastic portion 214b.
Also in the second connector 11, as shown in the figure, a tube having an outer surface in which a flow channel cylinder 213 is inserted into an end portion of the other tube to form a plurality of tapered steps for frictionally engaging the end portion. The mounting portion 213a and the flange lid portion 213b that seals the opening portion on the outer peripheral side of the flow channel cylinder 213 on the other end side (left side in FIG. 12) of the outer cylinder 212 can be provided.

Here, in the present invention, in both the first connector 1 and the second connector 11, the valve portions 204a and 214a of the elastic valve members 204 and 214, and the openings 202a and 212a of the outer cylinders 202 and 212 in FIG. Are provided with slits 205 and 215 extending in the radial direction (the front and back direction of the paper surface in FIG. 12).
Further, here, in each of the first connector 1 and the second connector 11, the opening 202a, the inner surface of the outer cylinder 202, 212 is spaced from the opening 202a, 212a of the outer cylinder 202, 212 by a predetermined distance. Each of the deformation receiving spaces 207a, 207b, 217a, and 217b, which are recessed toward the outer peripheral side as compared with the inner surface region on the 212a side, is formed at, for example, two locations at the top and bottom in FIG. Note that, depending on the diameter and tip shape of the flow path cylinders 203 and 213, it is possible to have no deformation receiving space. Therefore, the formation of the deformation receiving space is not an essential configuration of the present invention.

In the first connector 1 and the second connector 11 having such a configuration, the slits 205 and 215 provided in the valve portions 204a and 214a are closed in the non-fitted state shown in FIG. Here, leakage of the liquid flowing through the tube is prevented.
And in order to fit the 1st connector 1 and the 2nd connector 11 as shown in FIG. 13, it can carry out only by inserting the 2nd connector 11 inside the 1st connector 1. FIG.

If the movement of each constituent member at the time of such fitting is described in detail, first, a portion on one end side of the outer cylinder 212 on the second connector 11 side inserted inside the outer cylinder 202 on the first connector 1 side The valve portion 204a of the elastic valve member 204 on the one connector 1 side is brought into contact with the peripheral portion thereof, and the valve portion 204a is pushed into the other end side of the outer cylinder 202 on the first connector 1 side.

Thereafter, when the valve portion 204a on the first connector 1 side pushed in as described above reaches the deformation receiving spaces 207a and 207b provided on the inner surface of the outer cylinder 202 on the first connector 1 side, the valve portion 204a Due to such an enlarged deformation of the valve portion 204a at the same time that the peripheral portion of the valve portion 204a partially enters the deformation receiving spaces 207a and 207b, for example, The slit 205 provided in the valve portion 204a is completely opened.

At this time, the flow path cylinder 203 inside the elastic part 204b of the elastic valve member 204 having the valve part 204a is formed in the slit 205 of the valve part 204a pushed into the other end side of the outer cylinder 202 on the first connector 1 side. While passing through, the flow path cylinder 203 pushes the valve portion 214a on the second connector 11 side into the other end side of the outer tube 212 on the second connector 11 side, so that the valve portion 214a becomes the outer tube. When reaching the deformation receiving spaces 217a and 217b provided on the inner surface of 212, the valve portion 214a expands and deforms to the outer peripheral side, and the elastic deformation portion of the valve portion 214a toward the outer cylinder 212 becomes the deformation receiving space 217a, 217b will be entered.
Thereby, also on the second connector 11 side, the slit 215 provided in the valve portion 214a is completely opened, and the flow channel cylinder 213 penetrates therethrough.

As described above, the flow path cylinders 203 and 213 on the first connector 1 side and the second connector 11 side respectively have the valve portions 204a and 214a of the elastic valve members 204 and 214 surrounding the flow path cylinders 203 and 213. After passing through the respective slits 205, 215, the flow path cylinders 203, 213 are, for example, shown in FIG. The flow path cylinder 213 on the connector 11 side is fitted inside the flow path cylinder 203 on the first connector 1 side and the like, thereby forming a flow path through which the liquid flowing through the tube flows.

In such a fitting state between the first connector 1 and the second connector 11, liquid leakage to the outside of the tube connection structure is caused by one end side portion of the outer tube 212 on the second connector 11 side and one end side portion thereof. This is reliably prevented in the contact area with the disc-shaped portion 206 of the valve portion 204a on the first connector 1 side to be pressed.

Here, the deformation receiving spaces 207a and 207b provided by partially denting the inner surface of the outer cylinder 202 on the first connector 1 side are shown in FIG. 14A in a cross-sectional view taken along the line aa in FIG. As shown in FIG. 14, the inner surface of the outer cylinder 202 corresponds to the opening direction of the slit 205, here, the vertical direction of FIG. 14 orthogonal to the extending direction of the slit 205 that extends in the horizontal direction of FIG. 14 and opens in the vertical direction. For example, two positions may be provided at the outer peripheral side by being recessed at the deepest curved surface at the intersection C1 or C2 with the straight line L extending in the vertical direction in FIG. 14 across the central axis of the outer cylinder 202. it can.

Such deformation receiving spaces 207a and 207b are fitted in the fitting state shown in FIG. 13, and the valve portion 204a on the first connector 1 side pushed in by the outer tube 212 on the second connector 11 side is outside the first connector 1 side. When elastically deforming toward the tube 202 side, the elastic deformation portions E1 and E2 function to be received as shown in FIG. 14B, whereby the deformation receiving spaces 207a and 207b of the valve portion 204a are functioned. The slit 205 on the first connector 1 side can be opened as shown in FIG.

When the first connector 1 and the second connector 11 are fitted together, the valve portion 204a that is pushed into the other end side of the outer cylinder 202 is simply deformed to escape toward the outer cylinder 2 that causes the opening of the slit 205. From the viewpoint of allowing it, as shown in FIG. 15, it is also possible to provide a deformation receiving space 227 that is recessed over the entire circumference of the inner surface of the outer cylinder 202.

However, when a deformation receiving space 227 is provided over the entire circumference of the inner surface of the outer cylinder 2 as shown in FIG. The valve portion 204a in which the peripheral edge portion of the shaped portion 206 enters the deformation receiving space 227 is caught over the entire circumference of the deformation receiving space 227, and depending on the amount of depression of the deformation receiving space 227, the first connector 1 When removing the two connectors 11, the restoring force of the elastic portion 204b may cause the valve portion 204a not to return to the opening 202a of the outer cylinder 202, and the slit 205 may remain open in a non-fitted state. As shown in FIG. 14, two deformation receiving spaces are provided at respective positions on the inner surface of the outer cylinder 202 corresponding to the direction in which the slit 205 opens. It is preferable.

Further, if the deformation receiving spaces 207a and 207b are recessed on the outer peripheral side at the position on the other end side of the outer cylinder 2 from the inner surface area on one end side of the outer cylinder 202 into which the valve portion 204a is fitted, In the fitted state, the elastic deformation portions E1 and E2 of the valve portion 204a pushed into the other end side of the outer cylinder 202 to the outer cylinder 202 side can be received, so the outer cylinder 202 of the deformation receiving spaces 207a and 207b. The width W along the axial direction can be changed as appropriate. For example, the width W of the outer cylinder 2 can be recessed to the other end face. Here, the separation distance D of the deformation receiving spaces 207a and 207b from the end surface on the one end side of the outer cylinder 202 is set according to the dimensions of the flow path cylinder 203 and the constituent members on the second connector 11 side. Can do.
In addition, what was mentioned above about the deformation | transformation receiving space by the side of the 1st connector 1 is the same also about the deformation | transformation reception space by the side of the 2nd connector 11. FIG.

According to such a tube connection structure, when the second connector 11 is detached from the first connector 1 in a fitted state between the first connector 1 and the second connector 11, the elastic valve members 204, 214 are Since the restoring force of any of the elastic portions 204b and 214b compressed in the axial direction of the outer cylinders 202 and 212 acts in a direction to remove the second connector 11 from the first connector 1, the force required for such removal is obtained. Can be small.
Further, when the first connector 1 is attached to the second connector 11, the valve portions 204a and 214a pushed into the other end side of the outer cylinder 202 or 212 have deformation receiving spaces 207a, 207b, 217a and 217b on the outer peripheral side. Accordingly, the respective slits 205 and 215 are dragged and opened by the above-described relief deformation, so that the force required to open the slits 205 and 215 is made sufficiently small. The attachment between the first connector 11 and the second connector 11 can also be easily performed.
Therefore, according to this tube connection structure, operability can be greatly enhanced.

In addition, this tube connection structure is configured so that the flow paths on the first connector 1 side and the second connector 11 side are fitted to each other, and the flow path for flowing the liquid is between one tube and the other tube. For example, when the inner diameters of the flow path cylinders 203 and 213 are set to a required size so as to pass some urinary calculi or the like having a particle diameter of about 3 mm. However, the outer diameter of the outer cylinders 202 and 212, and hence the outer diameter of the connectors 1 and 11, can be made relatively small, thereby making the entire tube connection structure small and easy to handle. be able to.
As a result, when the tube connection structure is provided, for example, in the middle of the urinary catheter attached to the urine storage bag, the outer diameter of the patient connected to the urine storage bag through the urinary catheter moves. The small connectors 1 and 11 are not troublesome for the patient, and the quality of life of the patient can be greatly improved. In addition, despite the small outer diameter of the connectors 1 and 11, the wide connection in the tube connection structure Since the passage can be secured, clogging of urine-derived suspended matters or the like can be effectively prevented.

Further, in this tube connection structure, the flow path cylinders 203 and 213 for allowing the liquid to flow inside are separated from the elastic valve members 204 and 214, here, the cylindrical elastic portions of the elastic valve members 204 and 214. 204b and 214b are arranged on the inner side, but as shown in the figure, cylindrical cylindrical bodies 203, 213 having a smooth inner surface and having a smooth inner surface have a bellows-like shape having a conventional tube connection structure. Compared with elastic members, liquids such as urine are less likely to remain and adhere, so it is possible to effectively suppress the occurrence of sanitary problems due to the liquid remaining in the connector and the components contained in it. Can do.

Examples of the material of the flow path cylinders 203 and 213 include polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride, polyvinylidene chloride, polystyrene, Polyamide, polyimide, polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT) and other polyesters and polyethers Polyetherketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer ), Various resin materials such as polytetrafluoroethylene, polyvinylidene fluoride, and other fluororesins, or blends, polymer alloys, and the like containing one or more of these materials. In addition, it is also possible to configure with various glass materials, ceramic materials, and metal materials.
The structural members other than the flow path cylinders 203 and 213 and the elastic valve members 204 and 214, for example, the outer cylinders 202 and 212, can also be formed of the same material as that of the flow path cylinders 203 and 213.

On the other hand, examples of the material of the elastic body forming the elastic valve members 204 and 214 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, and ethylene-propylene. Various rubber materials such as rubber, hydrin rubber, urethane rubber, silicone rubber, fluoro rubber, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber Various thermoplastic elastomers such as chlorinated polyethylene and chlorinated polyethylene can be used, and one or more of these can be used in combination.

Incidentally, as shown in FIG. 12, in any of the elastic valve members 204 and 214, the cylindrical elastic portions 204b and 214b have a large-diameter portion having a large inner and outer diameter and a small-diameter portion having a small inner and outer diameter. The valve portions 204a and 214a, which are formed in a bellows shape by being alternately arranged in the axial direction thereof, and provided continuously to the tip portions of the elastic portions 204b and 214b, are formed in a disc-like portion 206. , 216 is formed into a tapered cylindrical shape with a bottom wall in which the inner and outer diameters gradually decrease toward the elastic portions 204b and 214b, and the elastic valve members 204 and 214 are so-called mechanical valves. The elastic valve member is not limited to the illustrated form as long as the elastic portion is provided in the valve portion as described above.
Here, although illustration is omitted in the present invention, the valve portion and the elastic portion of the elastic valve member can be formed of separate members on at least one side of the first connector side and the second connector side. For example, the valve portion is a disk-shaped member made of an elastic body, and the elastic portion is arranged around the flow path cylinder so that the disk-shaped member is biased toward one end of the outer cylinder. It can be a spring.

In the illustrated embodiment, the valve portion 204a of the elastic valve member 204 from the inner side surface (the surface facing the left side in FIG. 12) of the flange cover portion 203b of the first connector 1 in the non-fitted state shown in FIG. The distance x along the axial direction to the outer side surface (the surface facing the left side in FIG. 12) and the axial length y of the outer cylinder 202 are made equal. As a result, the distal end surface S1 of the first connector 1 formed by the valve portion 204a of the elastic valve member 204 and the one end side portion of the outer cylinder 202 in a non-fitted state becomes a flat surface. It becomes easy to wipe off the liquid which may adhere, and infection etc. can be prevented. The same applies to the distal end surface S2 of the second connector 11 formed by the valve portion 214a of the elastic valve member 214 and the one end side portion of the outer cylinder 212.
That is, the surface areas of the tip surface S1 of the first connector 1 facing the second connector 11 and the tip surface S2 of the second connector 11 facing the first connector 1 are both flat surfaces. This makes it difficult to disinfect or remove the liquid from the front end surface S1 of the first connector 1 and the front end surface S2 of the second connector 11 when the first connector 1 and the second connector 11 are not fitted. Since there is no recess, the tip surfaces S1 and S2 can be easily and reliably sterilized, and at the same time, liquids and foreign matters adhering to the tip surfaces S1 and S2 can be easily and reliably wiped off. .

In the tube connection structure described above, in order to fix the connectors 1 and 11 in a state where the first connector 1 and the second connector 11 are fitted together, the outer cylinder 202 on the first connector 1 side or the Of the outer cylinder 212 on the second connector 11 side, the opening 202a on one end side of the outer cylinder 202 on the first connector 1 side with the larger inner and outer diameters is directed toward the inside of the outer cylinder 202 as shown in a perspective view in FIG. As shown in FIG. 16, one or more, preferably two inward projections 208 that face each other are provided, and the outer surface of the outer tube 212 on the second connector 11 side having a smaller inner and outer diameter is provided. The guide groove portion 218 that opens to one end side of the outer cylinder 212 and extends from one end side to the other end side of the outer cylinder 212 corresponds to the arrangement position and the number of the inward projections 208, Here two You can kick it.

Here, each of the guide groove portions 218 shown in FIG. 16 is slightly larger than the width of the inward projection portion 208 over the entire length, as shown in FIG. 17A by developing the outer surface of the outer tube 212 of the second connector 11. With a wide groove width, the axial direction of the outer cylinder 212 along the outer surface of the outer cylinder 212 from the one end side (right side in FIG. 17) to the other end side (left side in the figure) of the outer cylinder 212 (left-right direction in FIG. 17) ), And the bent portion 218a to 218c at the other end of the outer tube 212 is bent into a convex crest at the other end of the outer tube 212. It will be.

When the inward projection 208 and the guide groove 218 are formed, the first projection 1 and the second connector 11 are fixed with each other in order to fix the first connector 1 and the second connector 11 with each other. The outer tube 202 on the first connector 1 side is moved toward the other end side of the outer tube 212 on the second connector 11 side so that the outer tube 202 on the first connector 1 side is slid toward the other side. While being screwed into the outer cylinder 212, when the inward projection 208 reaches the bent portions 218a to 218c of the guide groove 218, a slightly larger screw into the outer cylinder 202 on the first connector 1 side. Under the action of force, the inward projection 208 can be carried out by getting over the bent portions 218 a to 218 c at the end of the guide groove 218.
In this guide groove portion 218, a click sound can be generated when the inward projection portion 208 gets over the bent portions 218a to 218c, so that the user has fixed the first connector 1 and the second connector 11 The bent portions 218a to 218c function to prevent the second connector 11 from being unintentionally detached from the first connector 1 and to lock them together.

In addition to the form described above, the guide groove portion extends in parallel with the axial direction of the outer cylinder 222 on the second connector 11 side, as shown in FIG. For example, the bent portion 228a is bent at a right angle toward one side in the circumferential direction of the outer cylinder 222 (vertical direction in FIG. 17), or as shown in FIG. 17 (c), as shown in FIG. 17 (b). As shown in the figure, it extends parallel to the axial direction of the outer cylinder 232 on the second connector 11 side, bends toward one side in the circumferential direction of the outer cylinder 232 at the bent portion 238a, and further bends at the bent portion 238b. Various extending forms such as a form that extends and terminates somewhat toward the one end side of the outer cylinder 232 can be employed.

When the guide groove portion of the form shown in FIGS. 17B and 17C is provided, the second connector 11 is pushed into the first connector 1 without being twisted, and the inward projection 208 is inserted into the guide groove portion 228 or On the inside of 238, the first connector 1 and the second connector 11 are slid from one end side to the other end side of the outer tube and when the bent portion 228a or 238a in the circumferential direction of the outer tube is reached. Based on the restoring force in the axial direction of each of the elastic portions 204b and 214b that have been compressed by being relatively rotated, the inward projection 208 has the guide groove 228 in the form shown in FIG. 17B. In this embodiment, the guide groove portion 238 extends toward one end of the outer cylinder 232 in the form shown in FIG. 17C. It supposed to fit in a portion that can be fixed, respectively.

However, when the tube joint structure of the present invention is provided in the middle of the urinary catheter as described above, the second connector 11 is disconnected from the first connector 1 even when the tube is pulled with a large force. If the connectors 1 and 11 are kept in the fitted state, the urinary catheter placed in the patient's bladder may be pulled out of the bladder. Moreover, the guide groove part 218 of the form shown to Fig.17 (a) from which the 2nd connector 11 shall be removed from the 1st connector 1 is more preferable than the thing of another form.
In any of the guide groove portions 218, 228, 238 described above, the bent portions 218a to 218c, 228a, 238a, 238b can be curved portions (not shown).

Since there is no portion protruding toward the outside of the tube connection structure, the tube connection structure may come into contact with, for example, the patient's skin, etc., in the lock mechanism configured by such inward projections and guide groove portions. Even if it exists, the skin is not damaged, so it is particularly effective when used for medical and welfare tubes.

Also, here, when the inward projection 208 as described above is provided in the opening 202 a of the outer cylinder 202, the first connector 1 is in a non-fitted state between the first connector 1 and the second connector 11. The disc-shaped portion 206 of the valve portion 204a, which is positioned at the opening 202a of the outer cylinder 202 by the urging force of the elastic portion 204b, is located on a part of the circumferential direction corresponding to the position where each inward projection 208 is disposed. By providing a recess (not shown) into which the inward protruding portion 208 enters, an inward protruding portion 208 that protrudes inward at the opening 202a of the outer cylinder 202 is provided, and the disk-shaped portion 206 faces outward. As shown in FIG. 12, the front surface can be positioned substantially on the same plane as the end surface on the one end side of the outer cylinder 202.

Next, a comparative test on the adhesion of urine components (for example, organic substances and metals) depending on the material was carried out, and will be described below.
Test samples 1 and 2 each consisting of silicone and elastomer as the elastic body, and test samples 3 to 6 each consisting of polyethylene, polycarbonate, polypropylene and ABS resin (acrylonitrile-butadiene-styrene copolymer synthetic resin) as the rigid body Each was immersed in 5 mL of urine collected from a healthy person and stored at 37 ° C. for 7 days, and the weight before and after immersion was measured. The results shown in Table 1 were obtained. Note that the surface area of each test sample is constant.

As is apparent from Table 1, the weights of test samples 1 and 2 made of an elastic body are significantly increased after immersion compared to test samples 3 to 6 made of a rigid body. It can be seen that more urine components adhered to these test samples 1 and 2 than in test samples 3 to 6.
Therefore, according to the tube connection structure of the present invention, the liquid flow path that flows through the tube in the fitted state between the first connector and the second connector is configured only by the flow path cylinder made of a rigid body. For example, it is possible to effectively suppress the adhesion of components contained in urine compared to the conventional one in which the liquid flows directly inside the elastic member. It is clear that hygiene problems (smell and bacterial growth) and urine stone formation due to adhesion can be prevented.

DESCRIPTION OF SYMBOLS 1 1st connector 2 Outer cylinder 2a Opening part 3 Communication part 3a Bottom wall 3b Flow hole 3c Base part 4 Annular valve body 4a Recessed part 4s Opposing surface 4p Annular seal convex part 5 Rigid support member 6 First elastic body 7 Tube connection member DESCRIPTION OF SYMBOLS 8 Inward protrusion part 9 Linear groove 10 Fitting convex part 11 2nd connector 12, 22, 32 Inner cylinder 12a Inward flange part 12s Opposing surface 13 Inner valve body 13a Elastic body accommodating part 14 Second elastic body 15 Tube connection member 16, 26, 36 Guide groove portions 16a to 16c, 26a, 36a, 36b Bending portion 17 Elastic body supporting member 18p Annular seal convex portion S1 First connector tip surface S2 Second connector tip surface H Projection height of annular seal convex portion W Width of annular seal convex portion D Inner diameter of annular seal convex portion 62, 72, 82, 92 Outer cylinder 62a, 72a Opening portion 63, 73 Movable valve body 3a, 73a Ring-shaped convex part 63b, 73b Slit 63c, 73c Flexible wall part 63d Depressed part 64, 74 Rigid support member 65, 75 Channel cylinder 65a, 75a Tube attachment part 65b, 75b Flange cover part 66, 76 Elasticity Member 67 Inward projecting portion 77, 87, 97 Guide groove portion 77a to 77c, 87a, 97a, 97b Bent portion 68 Linear groove 69 Fitting convex portion 202, 212, 222, 232 Outer cylinder 202a, 212a Opening portion 203, 213 Flow Road cylinders 203a, 213a Tube mounting portions 203b, 213b Flange lid portions 204, 214 Elastic valve members 204a, 214a Valve portions 204b, 214b Elastic portions 205, 215 Slits 206, 216 Disc-shaped portions 207a, 207b, 217a, 217b, 227 Deformation acceptance 208 Inwardly protruding portion 218, 228, 238 Guide groove portion 218a to 218c, 228a, 238a, 238b Bending portion L Straight line C1, C2 straight line L and inner surface of outer cylinder extending in the vertical direction of FIG. E1, E2 Elastic deformation location of the valve portion W1 Width of the deformation receiving space along the axial direction of the outer cylinder D1 Separation distance of the deformation receiving space from the end surface on one end side of the outer cylinder

Claims (15)

1. The first connector and the second connector that are provided at the respective ends of the two tubes and are fitted together, and in a non-fitted state between the first connector and the second connector, Connection of a tube used for a living body that prevents leakage of a flowing liquid and connects the two tubes to each other so that the liquid can flow in a fitted state between the first connector and the second connector. Structure,
   In the non-fitted state, both the front end surface of the first connector facing the second connector and the front end surface of the second connector facing the first connector are both substantially flat surfaces. A tube connection structure characterized by that.
2. The first connector includes an outer cylinder to which one of the tubes is connected on one end side, and extends from one end side of the outer cylinder to an opening on the other end side on the inner side of the outer cylinder. A communication portion that communicates with each other, and an annular valve body that is provided around the communication portion and seals the opening on the other end side of the outer cylinder in the non-fitted state,
   In the second connector, the other tube is connected to one end side, and the other end portion enters the inside of the outer cylinder in the fitted state so that the annular valve body is placed inside the outer cylinder. The inner cylinder to be pushed in and in the non-fitted state, the inner cylinder is fitted inside the other end portion of the inner cylinder to seal the other end side of the inner cylinder, and in the fitted state, the inner cylinder is formed by the communication portion. With an inner valve body that is pushed inside
   A pair of annular seal projections projecting from the opposing surfaces and contacting each other in the fitted state are provided on the opposing surfaces of the annular valve body and the other end portion of the inner cylinder, In the fitted state, the front end surface of the first connector formed in the opening on the other end side of the outer cylinder with the annular valve body and the communication portion, and the inner valve on the other end side of the inner cylinder The surface area other than the annular seal convex portion of each of the distal end surfaces of the second connector formed by the body and the other end portion of the inner cylinder is a flat surface. The tube connection structure described.
3. The first connector further includes a first elastic body that urges the annular valve body toward the other end side of the outer cylinder inside the outer cylinder, and the second connector includes the inner valve body. The tube connection structure according to claim 2, further comprising a second elastic body that urges toward the other end side of the inner cylinder.
4. The opening on the other end side of the outer cylinder is provided with one or more inward projections projecting toward the inner side of the outer cylinder, and opens on the outer surface of the inner cylinder on the other end side of the inner cylinder. And one or more guide groove portions that extend from the other end side of the inner cylinder toward the one end side, and the inward projection portion enters and slides when the first connector and the second connector are fitted together. The tube connection structure according to claim 2 or 3, wherein the tube connection structure is provided.
5. One or more flow holes extending in the axial direction of the communication portion are provided on the side wall of the communication portion having a tubular shape whose one end is sealed with a bottom wall,
   The first elastic body is a coil spring, the first elastic body is compressed in the axial direction of the communicating portion in the fitted state, and a gap between the spirally wound windings is closed, and The tube connection structure according to claim 3, wherein the tube connection structure is arranged around the communication portion in a form in which a gap between the windings opens in a non-fitted state.
6. The tube according to claim 3, wherein the inner valve body is provided with an elastic body housing portion that houses the second elastic body in a compressed posture in the axial direction of the inner cylinder in the fitted state. Connection structure.
7. 4. The tube connection structure according to claim 2, wherein at least one of the pair of annular seal projections is made of an elastic material.
8. 5. The tube connection structure according to claim 4, wherein the guide groove portion has at least one bent or curved portion at an end portion on one end side of the inner cylinder.
9. Each of the first connector and the second connector is located on one end side of the outer cylinder having an opening on one end side, and is pushed into the other end side of the outer cylinder in the fitted state. A movable valve body capable of moving in the axial direction within the outer cylinder, a flow path cylinder body fixedly disposed on the back side of the movable valve body inside the outer cylinder, and the liquid flowing therein; and the movable cylinder Each comprising an elastic member that biases the valve body toward the opening on one end side of the outer cylinder,
   To the movable valve body on each of the first connector side and the second connector side to the back surface of the movable valve body that moves toward the other end side of the outer cylinder that surrounds the movable valve body in the fitted state. , By the contact of the flow channel cylinder on the back surface side, it is pushed and spread to one end side of the outer cylinder so that the flow path cylinders on the first connector side and the second connector side communicate with each other. The tube connection structure according to claim 1, wherein each of the slits to be provided is provided.
10. Each of the movable valve bodies on the first connector side and the second connector side has a pair of flexible wall portions located on both sides of the slit to form the slit,
    By engaging the flexible wall portion of the movable valve body on the first connector side and the flexible wall portion of the movable valve body on the second connector side in the fitted state, A part of the flow path is formed by surrounding a gap between the flow path cylinder on the first connector side and the flow path cylinder on the second connector side, which are located apart from each other. The tube connection structure according to claim 9.
11. In the fitted state, the end portion of the flow path cylinder on the first connector side is positioned between the flexible wall portions on both sides of the splayed slit of the movable valve body on the first connector side. The end of the flow channel cylinder on the second connector side is located between the flexible wall portions on both sides of the slit that is spread out of the movable valve body on the second connector side. The tube connection structure according to claim 10.
12. The tube connection structure according to claim 9 or 10, wherein the first connector and the second connector have at least one rigid support member on a back surface of the movable valve body.
13. Each of the first connector and the second connector is arranged with an outer cylinder having an opening on one end side, and fixed to the outer cylinder inside the outer cylinder, and the liquid flows inside. An elastic portion that encloses the periphery of the flow channel cylinder and urges the valve portion toward the one end side of the outer cylinder on the flow channel cylinder made of a rigid body and a valve portion that fits on one end side of the outer cylinder Each of which is provided with an elastic valve member,
    On each of the first connector side and the second connector side, the valve portion of the elastic valve member is closed in the non-fitted state to seal the inside of the outer cylinder, and opened in the fitted state. Forming a slit through which the flow channel cylinder inside the elastic valve member passes,
    In the fitted state, the flow channel cylinder on the first connector side and the flow path cylinder on the second connector side that enters the inside of the first connector are fitted to each other, and the liquid flows therethrough. The tube connection structure according to claim 1, wherein a flow path is formed.
14. Elastic deformation of the valve portion to be pushed into the other end side of the outer cylinder in the fitted state on the inner surface of the outer cylinder on each of the first connector side and the second connector side 14. The tube connection structure according to claim 13, further comprising a deformation receiving space which is recessed from the inner surface for receiving a portion.
15. The deformation receiving space is provided at two positions corresponding to the opening direction of the slit on the inner surface of the outer cylinder on each of the first connector side and the second connector side. 14. The tube connection structure according to 14.

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