WO2010048753A1

WO2010048753A1 - A continuous syringe with automatic replacing needles

Info

Publication number: WO2010048753A1
Application number: PCT/CN2008/072870
Authority: WO
Inventors: 潘秋保
Original assignee: Pan Qiubao
Priority date: 2008-10-29
Filing date: 2008-10-29
Publication date: 2010-05-06

Abstract

A continuous syringe with automatic replacing needles includes: a syringe cylinder (10), injecting needles (11), the springe cylinder (10) comprises a fluid reserve chamber (101) and a nozzle (102), a plunger mechanism (103) set in the chamber (101) for pushing the fluid, and a hollow extensible structure (104) also set in the cylinder, the extensible structer (104) has a length of pushing the needle(11) out of the syringe cylinder (10) when it is extended; the continuous syringe also includes: a rotatable revolver-type needles magazine (12) with a plurality of bores (120), each bore (120) has a injecting needle, the revolver-type needles magazine (12) is partially inserted in the syringe cylinder (10), when the needles magazine (12) is rotated, the bores (120) are correspondingly positioned at the coupling insert part in turn, which and the nozzle (102) and the extensible structure (104) are positioned in the channel formed by the syring cylinder (10).

Description

Continuous syringe with automatic needle changing

Technical field

The present invention relates to an injecting device, and more particularly to a continuous syringe for an automatic needle changing head.

Background technique

Hypodermic needles are widely used in modern medicine. For both human and animal bodies, needles are carriers for the delivery of fluids to therapeutic subjects. One prior art injection method is to assemble a subcutaneous injection needle onto a syringe, which is then inserted into a human or animal body for intramuscular, subcutaneous or intravenous injection. A needle for subcutaneous injection into a patient or an animal body is inevitably contaminated by the blood and body fluid of the patient, and if the used needle is repeatedly used, it may cause the spread of the germ, which may cause a huge medical hazard. A consensus has been reached in the medical community.

Therefore, one solution is to use a disposable needle and a disposable syringe, that is, after each end of the patient's operation, discard the used needle and syringe and replace it with a new unused needle and syringe. Can effectively avoid the spread of germs.

But at the same time, it brings another problem, that is, if the needle and the syringe are replaced every time, it is troublesome to operate, and each time you need to take medicine and exhaust, especially in the case of large-volume injection. For example, when multiple people or multiple animals are simultaneously vaccinated, such problems are more prominent. Continuous manual replacement of needles and syringes will result in low production efficiency. Many years ago, in animal medicine, people started using continuous syringes. Chinese patent CN86205455 discloses a continuous syringe which uses a one-way valve to release the handle after the first needle is injected, and the liquid is inhaled from the vial in one direction due to the vacuum. This continuous syringe greatly increases the efficiency of the injection. However, when using this continuous syringe, the needle cannot be replaced and is therefore rarely used for injection.

With the development of medical care, more and more vaccines need to be injected. In order to solve the problem of injection efficiency, Chinese patent CN200320109505.9 proposes to use a high-pressure gas to make a syringe, and use high-pressure gas to deliver the syrup into the animal or human body to complete the injection. However, the method is cumbersome and the high-pressure gas is easy to cause the body fluid of an animal or a person to splash on the nozzle, resulting in more infection.

Therefore, how to use a continuous syringe and automatically change the needle to avoid infection, become a technician Issues to consider. Summary of the invention

The technical problem to be solved by the present invention is to provide a continuous syringe for automatic replacement of the injection needle.

In order to solve the above technical problem, the present invention provides a continuous syringe comprising a syringe and an injection needle having a needle holder, the syringe comprising a cavity for containing a liquid and a nozzle, wherein the cavity is provided with a liquid pushing liquid a plunger mechanism, wherein the syringe barrel is further provided with a hollow telescopic mechanism, the front end of the telescopic mechanism is open, and the rear end is sealingly coupled with the cavity of the syringe, and the telescopic mechanism is extended to have the injection needle pushed out of the syringe a length, the front end opening is provided with a joint matching the needle seat of the injection needle;

The continuous injector further includes:

a rotatable revolver acupuncture having a plurality of lumens, each of which is provided with an injection needle, the left-wheeled needle portion partially engaging the syringe, and the engagement portion is located at the nozzle of the syringe Between the retractable mechanism and the left-handed pin, the plurality of cavities are sequentially located in the engaging portion, and the nozzle and the telescopic mechanism are located in a passage formed by the syringe.

Further, the engaging portion is a pushing body included in the front end opening, and correspondingly, the needle seat is provided with a wedge portion matching the pushing body.

Further, the joint portion is a hollow cylinder included in the front end opening, and correspondingly, the needle seat is provided with a slot matching the cylindrical body.

Further, the cavity further includes a one-way limiting device for retracting the telescopic mechanism, and leaving the injection needle in the cavity when the wheel is rotated to the cavity of the engaging portion Inside the cavity.

Further, the syringe further includes a liquid bottle connected to the cavity through the liquid inlet for adding an injection liquid to the syringe.

Further, the injector further includes a first driving device connected to the left-wheeled pin for driving the left-wheel pin to rotate.

Further, the syringe further includes a second driving device connected to the telescopic mechanism to drive the telescopic mechanism to extend or retract toward the nozzle in the axial direction of the syringe. Further, the syringe is a water gun type injection gun body, including a barrel with a nozzle, a handle and a trigger, the plunger mechanism is connected to the trigger, and the gun is pushed by the trigger The liquid in the tube.

Further, the syringe further includes a first sensing device connected to the trigger and the second driving device, and triggering a trigger to the second driving device after sensing that the trigger is partially pressed The signal drives the telescopic mechanism to extend along the nozzle in the axial direction of the syringe.

Further, the syringe further includes a second sensing device connected to the trigger and the second driving device to send a trigger signal to the second driving device after sensing that the trigger is released. The telescopic tube is driven to retract.

Further, the syringe further includes a third sensing device connected to the first driving device, and a trigger signal is sent after the telescopic tube is retracted to drive the left wheel pin to rotate.

Further, the syringe further comprises:

A clamping device, adjacent the syringe mouth, for clamping or releasing the joint when the needle is ejected from the nozzle by a telescoping mechanism.

Further, the syringe further includes:

A third driving device is coupled to the clamping device for driving the clamping device to be clamped or released.

Further, the syringe further includes a fourth sensing device connected to the third driving device, and driving the clamping device clip when the injection needle is sensed to be ejected from the injection nozzle by the telescopic mechanism tight.

Further, the second sensing device is further connected to the third driving device, and after detecting that the trigger is released, sending a trigger signal to the third driving device to drive the clamping device to release .

Further, the syringe further includes a return tube;

The return pipe includes a liquid inlet, a check valve and a liquid outlet; the liquid inlet communicates with the syringe through the one-way valve, and the liquid outlet is about to rotate to the lower portion of the engaging portion The mouth of a cavity corresponds to the mouth.

Further, the telescopic mechanism is a three-core sleeve. Further, the clamping device is a three-jaw chuck.

The present invention integrally designs a plurality of injection needles and a syringe, and places the injection needles one by one by placing the injection needles in a left-wheel type acupuncture mechanism and providing a specific telescopic mechanism. The syringe is connected or detached to realize the replacement of the needle and the injection of the liquid, so that the needle can be automatically replaced one by one during use, and the needle after use is immediately recovered, which has the characteristics of safe operation, and the present invention is provided by setting a liquid bottle or The syringe is large enough to automatically add liquid, avoiding the disadvantage of adding liquid for each use, which is convenient to use. BRIEF abstract

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a first embodiment of a continuous syringe of the present invention.

Fig. 2 is a structural schematic view showing a first embodiment of the present invention when an injection needle is pushed out of a nozzle. Figure 3 is a schematic view showing the internal structure of a second embodiment of the continuous syringe of the present invention. Preferred embodiment of the invention

The main idea of the invention is to provide a hollow telescopic mechanism in the rear part of the syringe, and a left-wheeled needle-shaped acupuncture matching the telescopic mechanism between the telescopic mechanism and the nozzle of the injection cylinder, and more of the left-wheeled acupuncture A plurality of injection needles are placed in the cavity, and the injection needle in the cavity is ejected out of the nozzle by the telescopic mechanism, and then the injection liquid in the hollow telescopic mechanism is pushed into the human body or the animal body for injection, and then used after the injection is completed. The retraction of the telescopic mechanism causes the injection needle to return to the cavity, and then the next needle is used one by one by the rotation of the left-wheeled needle.

The technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

Referring to Figure 1, there is shown a schematic view of the structure of a first embodiment of a continuous injector of the present invention. The continuous syringe of the present embodiment includes a syringe 10 and an injection needle 11 and a rotatable left-wheeled needle 12 having a needle holder 110. The figure exemplarily shows the case where all the injection needles 11 are located in the left-wheeled needle butt 12.

The syringe 10 includes a cavity 101 for accommodating a liquid and a nozzle 102. The cavity 101 is provided with a plunger mechanism 103 for pushing liquid. The syringe 10 is also provided with a hollow telescopic mechanism. 104.

The front end of the telescopic mechanism 104 is open, and the rear end is sealingly coupled with the cavity 101 of the syringe. The telescopic mechanism 104 has a length to push the injection needle 11 out of the syringe 10, and the front end opening is provided with the injection. The needle holder 110 of the needle 11 is matched with the engaging portion, and the engaging portion may be a pushing body included in the front end opening, and the needle holder 110 is provided with a wedge portion matching the pushing body.

In the embodiment, the telescopic mechanism 104 uses a three-core tube. In fact, the telescopic mechanism 104 can also be any other device that can achieve the same function.

The rotatable revolver acupuncture 12 has a plurality of lumens 120, each of which is provided with an injection needle 11, exemplarily showing several lumens 120 and an injection placed therein The specific number of the needle 11, the cavity 120 and the injection needle 11 can be set according to actual needs. The left-wheeled needle 12 is partially engaged with the syringe 10, and the engaging portion is located between the nozzle 102 of the syringe 10 and the telescopic mechanism 104. When the left-wheeled needle 12 rotates, The cavities 120 are sequentially located in the engaging portion, and are located in the passage formed by the syringe 10 with the nozzle 102 and the telescopic mechanism 104.

Each of the cavity 120 of the left-handed needle 12 further includes a one-way limiting device 1201 for retracting the telescopic mechanism 104, and the rotation of the telescopic mechanism 104 to the cavity 120 of the engaging portion The injection needle 11 is left in the cavity 120.

Referring to Fig. 2, there is shown a structural view of a first embodiment of the present invention when an injection needle is pushed out of a nozzle. Figure 2 shows an illustration of the situation in which the injection needle 11 located within the bore 120 of the engagement portion is pushed out of the orifice 102 by the telescoping mechanism 104.

In actual use, when the telescopic mechanism 104 is extended to extend the telescopic mechanism 104 to the position of the injection needle 11 in the cavity 120, the pusher body and the needle included in the telescopic mechanism 104 The wedge portion provided on the seat no is inserted, so that the telescopic mechanism 104 is connected to the injection needle 11, and by the further extension of the telescopic mechanism 104, the injection needle 11 is pushed to continue toward the nozzle 102. Until the injection needle 11 protrudes from the nozzle 102, after passing the plunger mechanism 103, the liquid in the cavity 101 is passed through the cavity of the telescopic mechanism 104, and then pushed through the injection needle 11 into the injection requiring injection. In the target body. After the injection is completed, at the same time, by retracting the telescopic mechanism 104, the telescopic mechanism 104 drives the injection needle 11 to retract together. When the injection needle 11 is retracted to the position of the cavity 120, the injection needle 11 is left in the cavity 120 by the one-way stopper 1201. Thereafter, by driving the revolver pin 12 to rotate, the used injection needle 11 is rotated to the next position, and the unused injection needle 11 is rotated to the engagement portion, after which the telescopic mechanism 104 can be driven to perform the next injection. This makes it possible to use the injection needles 11 one by one without the need to manually change the injection needle each time it is used.

For the control of the injectable liquid, a sufficient amount of liquid can be injected in the cavity 101 in advance, which is adapted to the number of the injection needles 11 included in the left-handed needle 12, and a volume indication is set on the cavity 101. For example, the tick mark, etc., the liquid used for each injection is controlled as needed.

Of course, it is also possible to connect the cavity 101 through the liquid inlet by providing a separate liquid bottle 105 for gradually adding the injection to the cavity 101 when the liquid in the cavity 101 is reduced. Liquid, this constitutes a further embodiment of the invention. In this case, it is necessary to push the plunger mechanism 103 back after the injection is completed, so that liquid can enter the cavity 101 from the liquid bottle 105.

In addition, the engaging portion included in the telescopic mechanism 104 may also be a hollow cylinder included in the front end opening. At this time, the needle holder 110 is provided with a slot matching the cylindrical body, which can also be realized. When the telescopic mechanism 104 is extended to the position of the injection needle 11 in the chamber, the telescopic mechanism 104 is coupled to the injection needle 11, and the object of the present invention can be achieved as well.

In order to ensure that the air in the injection needle 11 is removed, the embodiment further includes a return pipe 15 including a liquid inlet 151, a check valve 152 and a liquid outlet 153; The one-way valve 152 is in communication with the cavity 101 on the syringe 10, and the liquid outlet 153 corresponds to the opening of the next chamber 120 that is to be rotated into the engagement portion. The check valve 152 is located at the rear end of the return pipe 15, and when the liquid in the cavity 101 is retracted by the telescopic mechanism 104, the check valve 152 is opened by the increased hydraulic pressure in the cavity 101 to The liquid in the cavity 101 is allowed to flow through the liquid outlet 153 of the return pipe 15, and is injected into the next cavity to remove the air in the injection needle 11 to be used.

In the above embodiment, manual control can be applied to the control of the telescopic mechanism 104 and the left-wheeled pin 12, and of course, in order to realize automatic control, a driving device, a telescopic mechanism 104, and a revolver can be provided. 12 Control, the following detailed description.

A first driving device 13 and a second driving device 14 are provided, and the first driving device 13 is connected to the left-wheeled pin 12 for driving the rotation of the left-handed needle 12. The second driving device 14. The telescopic mechanism 104 is coupled to drive the telescopic mechanism 104 to extend or retract toward the nozzle 102 in the axial direction of the syringe 10. The first driving device 13 and the second driving device 14 described above may each be a motor, or the second driving device 14 may also be a magnetic sensing device or other device capable of achieving the object of the present invention. limited.

For the first driving device 13, an embodiment is that a step limiting device is further disposed on the left-wheeled pin 12, so that the first driving device 13 can be stepped to rotate the cavity. The 膛120 enters the engaging portion one by one.

Referring to Figure 3, there is shown a schematic view of the internal structure of a second embodiment of the continuous injector of the present invention. In this embodiment, a water gun type injection gun body is provided, including a barrel 20 with a nozzle, a handle 26 and a trigger 27, the barrel 20 having a cavity 201 for accommodating a liquid, and other components and the first The embodiment is the same, and the present embodiment will be described in detail below.

The trigger 27 is coupled to the plunger mechanism 203, and the plunger mechanism 203 pushes the liquid in the cavity 201 when the trigger 27 is fully pressed, and when the trigger 27 is released, The trigger 27 drives the plunger mechanism 203 to retreat.

In a specific implementation, the barrel 20 further includes a first sensing device, one end of which is connected to a partial pressing position of the trigger 27, and the other end of which is connected to the second driving device 24, and the trigger 27 is sensed. After being partially pressed, a trigger signal is sent to the second driving device 24, and the second driving device 24 drives the telescopic mechanism 204 to protrude toward the nozzle in the axial direction of the syringe 20.

In a specific implementation, the barrel 20 further includes a second sensing device, one end of the second sensing device is connected to the release position of the trigger 27, and the other end is connected to the second driving device 24, After the trigger 27 is released, a trigger signal is sent to the second driving device 24 to drive the telescopic mechanism 204 to retract.

The barrel 20 further includes a third sensing device connected to the first driving device 23. After the telescopic mechanism 204 is retracted, the third sensing device sends a trigger signal to the first A driving device 23 triggers the first driving device 23 to drive the left-wheeled butt 22 to rotate.

The barrel 20 further includes a clamping device for clamping or releasing the engagement portion formed by the needle holder 210 and the telescopic mechanism 204 when the injection needle 21 is ejected from the nozzle 202 by the telescopic mechanism 204. In particular, in order to control the action of the clamping device, a third drive device 31 is provided, which is connected to the clamping device for driving the clamping device to be clamped or released. At this time, the barrel 20 further includes a fourth sensing device connected to the third driving device 31, and when the needle is sensed to be ejected from the syringe mouth 202 by the telescopic mechanism 204, the clamping device is driven. Clamping.

When the clamping device is specifically controlled to be loosened, it may be further connected to the third driving device 31 by the second sensing device, and after the trigger 27 is sensed, the third driving device 31 is sent out. A trigger signal is used to drive the clamping device to release by the third driving device 31.

The sensing device used in the present invention may be any device capable of realizing a sensing function, such as a sensor or a stroke switch, and can be used by the syringe of the present invention as long as the object of the present invention can be achieved, all of which are protected by the present invention. Within the scope.

In the embodiment, the clamping device uses a three-jaw chuck, so that the clamping of the injection needle 21 can be better achieved. Of course, other structures can be used in specific applications, as long as the injection needle can be realized. The 21-clamping device can be used by the continuous injector of the present invention and is within the scope of the present invention.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

Industrial applicability

The continuous syringe of the automatic needle changing device of the invention can be applied to medical, sanitary and epidemic prevention industries and other industries requiring syringes, and the injection needle can be automatically replaced and recovered, which can improve work efficiency, and has the characteristics of convenient use and safe operation.

Claims

Claim

What is claimed is: 1. A continuous syringe for automatically changing a needle, comprising a syringe and an injection needle having a needle holder, the syringe comprising a cavity for containing a liquid and a nozzle, wherein the cavity is provided with a plunger mechanism for pushing a liquid, The injection cylinder is further provided with a hollow telescopic mechanism, the front end of the telescopic mechanism is open, the rear end is sealingly coupled with the cavity of the syringe, and the telescopic mechanism is extended to have the injection needle pushed out of the syringe. a length, the front end opening is provided with a joint matching the needle seat of the injection needle;

The continuous injector further includes:

The syringe according to claim 1, wherein the engaging portion is a pushing body included in the front end opening, and correspondingly, the needle holder is provided with a wedge portion matching the pushing body.

3. The syringe according to claim 1, wherein the engaging portion is a hollow cylinder included in the front end opening, and correspondingly, the needle seat is provided with a slot matching the cylindrical body. .

The syringe according to any one of claims 1 to 3, wherein the cavity further comprises a one-way limiting device for retracting the telescopic mechanism, and the wheel is rotated to When the lumen of the engagement portion is in the lumen, the injection needle is left in the lumen.

The syringe according to any one of claims 1 to 3, wherein the syringe further comprises a liquid bottle connected to the cavity through a liquid inlet for adding an injection to the syringe liquid.

6. The syringe according to claim 4, wherein the syringe further comprises a liquid bottle connected to the cavity through the liquid inlet for adding an injectable liquid to the syringe.

7. The syringe of claim 1 wherein said syringe further comprises a first drive The moving device is connected to the left wheel type butt for driving the left wheel type pin.

The syringe according to claim 1 or 7, wherein the syringe further comprises a second driving device connected to the telescopic mechanism to drive the telescopic mechanism to protrude toward the nozzle in the axial direction of the syringe Or retract.

The syringe according to claim 1 or 7, wherein the syringe is a water gun type injection gun body, including a barrel with a nozzle, a handle, and a trigger, the plunger mechanism and the trigger Connected, the liquid in the barrel is pushed by the trigger.

10. The syringe of claim 9, wherein the syringe further comprises a first sensing device coupled to the trigger and the second driving device, wherein the trigger is partially compressed A trigger signal is sent to the second driving device to drive the telescopic mechanism to protrude in the axial direction of the syringe.

The syringe according to claim 10, wherein the syringe further comprises a second sensing device connected to the trigger and the second driving device, after sensing that the trigger is released The second driving device sends a trigger signal to drive the telescopic tube to retract to the original position.

The syringe according to claim 11, wherein the syringe further comprises a third sensing device connected to the first driving device to emit a trigger signal after the telescopic tube is retracted to the original position. Driving the left-wheeled needle to rotate.

13. The syringe of claim 1 or 12, wherein the syringe further comprises:

The syringe according to claim 13, wherein the syringe further comprises: a third driving device connected to the clamping device for driving the clamping device to be clamped or loosened.

The syringe according to claim 14, wherein the syringe further comprises a fourth The sensing device is coupled to the third driving device to drive the clamping device to clamp when the injection needle is sensed to be ejected from the syringe nozzle by the telescopic mechanism.

The syringe according to claim 14, wherein the second sensing device is further connected to the third driving device, and sends a light to the third driving device after sensing that the trigger is released. A trigger signal that drives the clamping device to release.

The syringe according to claim 15, wherein the syringe further comprises a return tube;

The syringe according to claim 17, wherein the telescopic mechanism is a three-core sleeve.

The syringe according to claim 18, wherein said clamping device is a three-jaw clamp