WO2010048811A1

WO2010048811A1 - Tubular stapler with safety device and stapler body thereof

Info

Publication number: WO2010048811A1
Application number: PCT/CN2009/072176
Authority: WO
Inventors: 马剑文
Original assignee: Ma Jianwen
Priority date: 2008-10-28
Filing date: 2009-06-08
Publication date: 2010-05-06

Abstract

A tubular stapler with safety device and stapler body thereof are disclosed. The stapler comprises a nail propping seat assembly (10), stapler nails and stapler body. The stapler body comprises a joint shaft assembly (20), a handspike assembly (30), a nail stock assembly (40), a shell assembly (50), a movable handle (61), an adjustable nut (71), a safety block (81) and a pointer (91). The stapler body is fitted with a display window showing a green area that the pointer enters when in safe position, said pointer working in linkage with the automatic opening of the safety block. The clinician can then observe the pointer in the green area and hear the impact sound of the safety block's automatic opening; this double indication signals that the stapler has entered the stapling area, and the clinician can proceed to make slight adjustments of the stapling distance according to the thickness of tissue. The clinician then pulls the movable handle to perform cutting and stapling functions. The stapler avoids percussion outside a preset range, and is simple and convenient to operate, while providing safety and reliability.

Description

Tube type stapler with safety device and stapler body thereof

Technical field

The invention relates to a tubular stapler and a stapler body thereof. Background technique

Existing tubular stapler, foreign such as American Johnson & Johnson, American surgical company's circular stapler, domestic such as Changzhou New Energy Stapler General Plant Co., Ltd., Changzhou "Kangdi" company, Suzhou "Frankman" company, etc. The enterprise's tubular stapler is a disposable surgical instrument suitable for the contralateral or end-to-end anastomosis of the human esophagus and gastrointestinal tract.

The tubular stapler includes an anvil assembly, a staple, and a stapler body. The stapler body includes a shaft assembly, a cartridge assembly, a housing assembly, an adjustment nut assembly, a pointer mechanism, a movable handle assembly, a push rod assembly, and a safety block assembly.

In use, the abutment is inserted into the front end of the shaft, and the adjusting nut is rotated clockwise to make the joint axially move backward, thereby driving the abutment to move backward. When the abutment and the cartridge assembly reach a predetermined matching distance, the pointer In the safe green zone, the safety is manually turned on, the movable handle is pulled, and the inner ring cutter of the cartridge assembly is cut through the pusher assembly to cut excess tissue, while the staples in the cartridge assembly are pushed out to conform the tissue.

In the process of using the above-mentioned stapler, the clinician should use the eye to observe whether the pointer has moved to the safe green area in a limited visual space before the insurance can be opened. The key here is to "reach the prescribed anastomosis distance". That is, "the pointer moves to the safe green area". This anastomosis parameter is pre-designed and adjusted by the device manufacturer according to the clinical anastomosis. If the clinician operates in accordance with the product instruction manual, if it is slightly negligent or observes the judgment error, it is not adjusted. When the specified anastomosis distance and the pointer move to the safe green area, the insurance is manually opened, and the movable handle is pulled, which may cause a false hit, resulting in an anastomosis failure. The stapler of Johnson & Johnson, American Foreign Company, Changzhou Kangdi Company, Suzhou Frankman Company, etc. is the stapler with manual opening safety device.

Chinese patent document CN2383477Y discloses an automatic safety opening device. When the utility model rotates the adjusting nut to a prescribed anastomosis distance, the safety block automatically opens under the action of the spring, and the clinician can hear the impact sound of the safety block. That is to say, the movable handle can be pulled to perform the anastomosis operation. When the anastomosis distance is not adjusted, since the upper part of the locking clip always abuts against the safety block, the safety block cannot be opened, and the movable handle cannot be pulled, and the accidental impact is not caused. . The utility model enables the clinician to correctly determine whether the stapler has been adjusted to a prescribed anastomosis distance by hearing, thereby avoiding operational errors. However, the structure of the opening device is relatively complicated. When the opening block is opened, the rotation angle of the safety block that collides with the movable handle is smaller, so the collision sound is smaller.

Chinese patent document CN201098164Y discloses a medical stapler in-position safety opening device, which not only has an in-place safety automatic opening device, but also has a window green area display function linked with an in-position insurance automatic opening device, and the clinician can both visually and visually It is possible to correctly judge whether the stapler has been adjusted in place by hearing. Properly implement the anastomosis operation. However, the device still has the problems of many parts, complicated structure, and insufficient impact sound. Summary of the invention

The problem to be solved by the present invention is to provide a tubular stapler having a safety device and a relatively strong impact sound, and a stapler body thereof.

The technical solution of the stapler body is: the stapler body comprises a shaft assembly, a push rod assembly, a cartridge assembly, a housing assembly, a movable handle, an adjustment nut, a compression spring, a safety block and a pointer;

The sleeve of the front end of the push rod of the push rod assembly is sleeved on the top shaft of the shaft assembly and axially slidably coupled with the top shaft; the front portion of the top shaft of the shaft assembly is located at the central sleeve of the fixed seat of the cartridge assembly And movable axially relative to the central sleeve; the front end of the sleeve of the pusher assembly pushes into the rear end opening of the housing of the cartridge assembly, and the pusher seat of the cartridge assembly The rear end is fastened to the pusher seat;

The outer casing component comprises an elbow, a left casing and a right casing; the elbow is sleeved outside the axle assembly and the push rod assembly, and the front end thereof is fixedly connected with the fixing shell of the cartridge assembly; the left casing and the right casing are fastened The fixed handle is formed together, the fixed handle is enclosed outside the axle assembly and the push rod assembly, and the front end of the fixed handle is fixedly connected with the rear end of the curved pipe; the movable handle is rotatably connected to the fixed handle through the handle pin, the first torsion spring sleeve On the handle pin, one end of the handle is abutted against the handle of the movable handle, and the other end is abutted against the first torsion spring stop pin; the first torsion spring stop pin is disposed on the fixed handle; the forked end of the movable handle is inserted In the toggle seat of the rod assembly;

The rear end of the fixed handle is rotatably connected with the adjusting nut, and the fixed handle and the adjusting nut are axially mutually constrained, and the front part of the adjusting nut is located in the fixed handle and is rotatably connected with the screw thread of the rear shaft of the connecting shaft assembly;

Its structural characteristics are:

The utility model further comprises a control board; the control board is a straight-angled board body, and comprises a side panel and a rear panel which are at right angles to each other, and the side panel comprises a hook portion, a notch portion and a blocking portion which are arranged in order from the front to the rear, and the hooking direction of the hook portion To the right, the notch direction of the notch is also to the right; the plate of the rear plate is provided with a through hole; the control plate is sleeved by the through hole of the rear plate on the screw of the rear axle of the shaft assembly, and is located at the shaft assembly The rear of the rear pressing member; the compression spring is also sleeved on the screw shaft of the rear axle, and the front end thereof elastically contacts the rear end surface of the rear panel of the control panel, and the front end surface of the rear panel of the control panel is limited by the shutter of the right casing Position, the right side edge of the side panel of the control panel extends into the limiting slot of the right housing and is limited in the up and down direction, and is slidable back and forth relative to the limiting slot to be in a non-fired position and a fired position. ; the rear end of the compression spring abuts against the baffles of the left and right housings;

The safety block is rotatably connected to the fixed handle through the safety pin, the second torsion spring is sleeved on the safety pin, and one end of the second torsion spring is abutted on the safety block, and the other end is abutted on the handle pin of the movable handle; The safety block has a handle abutting top surface, an impact surface and a working surface; when the control panel is in the non-fired position, the safety block is caught between the movable handle and the blocking portion of the side panel of the control panel by the handle abutting surface and the working surface. At this time, the handle of the safety block is directed downward to the top surface, the direction of the impact surface is backward, and the direction of the working surface is upward; when the control panel is in the firing position, the safety block is rotated by the second torsion spring and rotates through the control panel. The notch portion of the side plate releases the notch and is in contact with the fixed handle by the impact surface thereof; The pointer is rotatably connected to the right housing through the pointer pin, and the tip of the pointer is located at the window of the right housing; the third torsion spring is coaxially disposed with the pointer and one end thereof abuts against the right housing, and the other end abuts the pointer ; The hook of the control panel is hooked to the pointer.

In the above solution, the safety block includes an abutting block and an auxiliary block, and a torsion spring groove is formed between the abutting block and the auxiliary block; the abutting block and the auxiliary block are respectively provided with a pin hole; the working face of the safety block is located at the abutting block Upper, the second torsion spring is located in the torsion spring groove; the safety block pin shaft sequentially passes through the pin hole of the auxiliary block, the second torsion spring and the pin hole of the abutting block, and the right end protrudes into the right casing, the left end The head extends into the left housing.

In the above solution, the pointer comprises a pin sleeve, a needle body, a toggle block and a torsion spring block; the pointer pin is arranged on the right housing; the pointer is sleeved on the pointer pin of the right housing and the right housing Rotating connection; the pointer is elastically contacted by the torsion spring block and the third torsion spring; the pointer can be hooked by its hook portion by the hook portion of the control panel and rotated from front to back with the control panel.

In the above solution, the rear pressing member of the shaft assembly is a u-shaped clamping plate; the rear pressing member has a waist circular hole, and the rear pressing member is fixed on the optical axis of the rear shaft by the screw passing through the waist circular hole of the rear pressing member. And located at the back end of the optical axis.

The technical solution of the stapler of the present invention is based on the above technical solution of the stapler body, and the stapler further comprises an anvil assembly and a staple. In use, the staples are located in the staple cartridge cover of the staple cartridge assembly, and the attachment sleeve of the anvil assembly is snapped into the forward end of the top shaft and extends into the central sleeve of the mount of the cartridge assembly.

The beneficial effects of the present invention are as follows: (1) Since the safety block is usually located between the movable handle and the blocking portion of the side plate of the control panel, the working surface of the safety block abuts against the blocking portion of the control panel, so that the safety block cannot be Open, when the adjusting nut is rotated clockwise, the rear pressing member of the shaft assembly drives the control panel to translate backwards. When the side plate of the control panel is notched to the working surface of the upper end of the safety block, the safety block is under the action of the second torsion spring. It will automatically open, and the safety block will make a crash when its impact surface and the fixed handle collide quickly. Since the rotation angle of the safety block is about 90 degrees, the impact sound is louder; at the same time, the hook portion of the front end of the control panel is backward. The translation gradually approaches the pointer until the pointer is pulled by the dialing block of the pointer, so that the pointer rotates to the tip of the needle to reach the safe green area, that is, enters the prescribed anastomosis area, and the adjustment is performed after a slight adjustment, so that the present invention has an audiovisual function. Complete and effective technical effects. In addition, the above functions can be realized with only a few parts, and the structure is simple and compact. (2) The invention has the function of interlocking the display of the green area of the pointer with the automatic opening of the insurance. By observing the display of the pointer in the green area and the impact sound automatically opened by the safety block, the clinician is double prompted to enter the anastomotic area, and The visible tissue thickness can still be fine-tuned to the anastomosis distance, and then the movable handle is pulled to perform the cutting and anastomosis. Therefore, the present invention can prevent firing outside the previously set range, and is easy to operate, safe and reliable. (3) The rear pressing member of the coupling assembly of the present invention is provided with an oblong adjusting hole, and the position of the control panel can be finely adjusted by adjusting the position of the pressing member fixed on the rear axle, thereby realizing the automatic opening of the insurance and the green pointer. The area shows the exact linkage; at the same time, after the safety block is automatically opened, by rotating the adjusting nut, relying on the spring force between the control plate and the adjusting nut and the spring force of the second torsion spring, the position of the pointer in the green area of the window can be finely adjusted, that is, the fine adjustment The anastomosis distance between the abutment and the cartridge assembly, so the invention has both the automatic opening function and the adjustable distance. DRAWINGS

Figure 1 is a schematic view showing the structure of the stapler of the present invention.

Figure 2 is a perspective view of Figure 1.

Fig. 3 is a partial view showing the pointer window in the A direction of Fig. 1.

4 is a partially enlarged schematic view showing the relationship between the anvil assembly, the shaft assembly, the push rod assembly, the cartridge assembly and the housing assembly of FIG. 1.

Figure 5 is a perspective view of the control board of Figure 2.

Figure 6 is a perspective view of the safety block of Figure 2.

Figure 7 is a perspective view of the pointer of Figure 2.

The markings in the drawing are as follows:

Anvil assembly 10, anvil seat 11, connecting sleeve 12;

Axle assembly 20, top shaft 21, center shaft 22, rear shaft 23, optical shaft 23-1, lead screw 23-2, rear pressure member 24; push rod assembly 30, push rod 31, housing 31-1, dial Moving seat 32;

Cartridge assembly 40, mount 41, housing 41-1, central sleeve 41-2, staple cartridge cover 42, pusher seat 43, ring cutter 44;

Housing assembly 50, elbow 51, clamping ring 52, left housing 53, right housing 54, window 54-1, fixed handle 55, clamping ring 56;

Handle assembly 60, movable handle 61, handle body 61-1, shield 61-2, forked end portion 61-4, handle pin 62, first torsion spring 63, first torsion spring stop pin 64;

Control assembly 70, adjusting nut 71, compression spring 72, control plate 73, side plate 73-1, hook portion 73-2, notched portion 73-3, blocking portion 73-4, rear plate 73-5;

Safety block assembly 80, safety block 81, handle abutting top surface 81-1, impact surface 81-2, working surface 81-3, abutting block 81-4, auxiliary block 81-5, torsion spring groove 81-6, insurance Block pin shaft 82, second torsion spring 83;

Pointer assembly 90, pointer 91, pin sleeve 91-1, needle body 91-2, toggle block 91-3, torsion spring block 91-4, third torsion spring 93;

Bead 100. detailed description

(Example 1, stapler body)

1 to 4, the stapler body of the present embodiment includes a shaft assembly 20, a push rod assembly 30, and a cartridge assembly.

40. Housing assembly 50, handle assembly 60, control assembly 70, safety block assembly 80, pointer assembly 90 and bead 100.

The coupling assembly 20 includes a top shaft 21, a middle shaft 22, a rear shaft 23, and a rear pressing member 24, both of which are made of steel. The central shaft 22 is formed by stacking two integral steel strips; the rear axle is composed of a front-rear optical axis 23-1 and a lead screw 23-2. Two integral steel The front end of the belt 22 is sandwiched at the rear end of the top shaft 21, and the rear ends of the two integral steel strips 22 are sandwiched at the front end of the optical axis 23-1 of the rear axle 23.

The rear pressing member 24 is a U-shaped clamping plate; the rear pressing member 24 has a waist circular hole, and the rear pressing member 24 is fixed to the optical axis 23-1 of the rear axle 23 by a screw passing through the waist circular hole of the rear pressing member 24. Up, and located at the rear end of the optical axis 23-1.

The pusher assembly 30 includes a push rod 31 and a steel shifting seat 32. The pusher 31 is a rubber one, and is composed of a rod body 31-2 and a sleeve body 31-1 at the front end. The dial base 32 is fixed to the rear end of the push rod 31. The dial base 32 is provided with a shifting groove. The sleeve body 31-1 of the front end of the push rod 31 is fitted over the top shaft 21 of the joint assembly 20 and the push rod 31 is slidably coupled to the top shaft 21 in the axial direction.

The cartridge assembly 40 includes a mount 41, a cartridge cover 42, a pusher seat 43 and a steel annular cutter 44. The holder 41, the cartridge cover 42 and the pusher holder 43 are all plastic one-piece. The holder 41 includes a housing 41-1 and a center housing 41-2, and the center housing 41-2 is coupled to the housing 41-1 via a connecting rib. The cartridge cover 42 is fixed to the holder 41 and is located at the front end of the housing 41-1 of the holder 41, and the rear end of the cartridge cover 42 projects into the housing 41-1 of the holder 41. The push pin holder 43 is disposed in the fixing base 41 between the outer casing 41-1 of the fixing base 41 and the central sleeve body 41-2, and is slidable back and forth with respect to the fixing base 41, and the respective push pins of the front end of the push pin holder 43 The head extends rearwardly forward into the corresponding staple cartridge of the staple cartridge cover 42. The ring cutter 44 is fixed to the front end face of the center of the push pin holder 43, and the knife edge of the ring cutter 44 faces forward.

The front portion of the top shaft 21 of the axle assembly 20 is located in the central casing 41-2 of the fixed seat 41 of the cartridge assembly 40 and is axially movable relative to the central casing 41-2; the pusher of the pusher assembly 30 The front end of the sleeve 31-1 of the 31 extends into the rear end opening of the outer casing 41-1 of the fixing base 41 of the cartridge assembly 40, and is disposed at the rear end of the pusher seat 43 of the cartridge assembly 40 and with the pusher seat 43. Connected together.

The outer casing member 50 includes a steel elbow 51, a plastic left casing 53 and a plastic right casing 54. The elbow 51 is placed over the shaft assembly 20, the push rod assembly 30 and the bead 100. The bead 100 is used to prevent the rotation of the center shaft 22 and to maintain a certain pressure on the steel strip of the center shaft 22. The front end of the elbow 51 is inserted into the mount housing 41-1 to be tightly fitted to each other, and is clamped by the clamp ring 52 to the rear of the mount housing 41-1 and the elbow 51 at the rear of the mount housing 41-1. Outside the pipe section, the front end of the elbow 51 is fixedly coupled to the fixed seat housing 41-1 of the cartridge assembly 40.

The left housing 53 and the right housing 54 are fastened together to form a fixed handle 55 that surrounds the axle assembly 20 and the pusher assembly 30. The front end of the fixed handle 55 is sleeved on the rear end of the elbow 51, and is clamped by the hoop ring 56 on the front end of the fixed handle 55 and the pipe section of the elbow 51 at the front of the fixed handle 55, thereby fixing The front end of the handle 55 is fixedly coupled to the rear end of the elbow 51.

The handle assembly 60 includes a movable handle 61, a handle pin 62, a first torsion spring 63, and a first torsion spring stop pin 64. The handle pin 62, the first torsion spring 63 and the first torsion spring stop pin 64 are both made of steel. The movable handle 61 includes a steel handle body 61-1 and a plastic shield 61-2. The handle body 61-1 is composed of a left side plate, a right side plate, and a connecting plate which connects the left side plate and the right side plate together. The left side plate has a torsion spring baffle, and the left side plate and the right side plate are provided with pin holes. The shield 61-2 is tightly fitted over the handle body 61-1 and located below the handle body.

The handle pin 62 sequentially passes through the pin hole of the right side plate of the handle body 61-1 of the movable handle 61, the first torsion spring 62, After the pin hole of the left side plate of the handle body 61-1 of the movable handle 61, the right end thereof extends into the handle pin hole of the right case 54, and the left end projects into the handle pin hole of the left case 53, thereby making the movable handle 61 is rotationally coupled to the fixed handle 55.

The first torsion spring 63 is sleeved on the handle pin 62, and one end thereof abuts against the torsion spring baffle of the left side plate of the handle body 611-1 of the movable handle 61, and the other end abuts against the first torsion spring stop pin 64. .

One half of the pin body of the first torsion spring stopper pin 64 is embedded in the upwardly disposed semicircular torsion spring pin seat of the left housing 53 and the right housing 54, and the first torsion spring stopper pin 64 is exposed by the portion thereof A torsion spring 63 is in contact. The forked end portion 61-4 of the movable handle 61 is inserted into the dial groove of the dial base 32 of the push rod assembly 30 from the bottom to the top.

The control assembly 70 includes an adjustment nut 71, a compression spring 72, and a control board 73. As shown in FIG. 5, the control board 73 is a right-angled plate body including side plates 73-1 and rear plates 73-5 which are at right angles to each other, and the side plates 73-1 include hook portions 73-2 and notches which are disposed in order from front to back. In the portion 73-3 and the blocking portion 73-4, the hooking portion 73-2 is hooked to the right, and the notched portion 73-3 is also directed to the right; the back plate 73-5 has a through hole in the plate.

1 to 3, the rear end of the fixed handle 55 is rotatably connected with the adjusting nut 71, and the fixing handle 55 and the adjusting nut 71 are axially restrained from each other, and the front portion of the adjusting nut 71 is located in the fixed handle 55 and is connected. The lead screw 23-2 of the rear axle 23 of the shaft assembly 20 is threadedly coupled.

The control plate 73 is sleeved on the lead screw 23-2 of the rear axle 23 of the axle assembly 20 by the through hole of the rear plate 73-5, and is located behind the rear pressing member 24 of the axle assembly 20; the compression spring 72 is also sleeved. On the lead screw 23-2 of the rear axle 23, and its front end is in elastic contact with the rear end surface of the rear plate 73-5 of the control board 73, the front end face of the rear plate 73-5 of the control panel 73 is blocked by the right casing 54. The board is limited, and the right side of the side panel 73-1 of the control board 73 extends into the limiting slot of the right housing 54 to be restricted in the up and down direction, and is slidable relative to the limiting slot. The non-fired position and the fired position; the rear end of the compression spring 72 abuts against the baffles of the left and right housings 53, 53.

The safety block assembly 80 includes a safety block 81, a safety block pin 82, and a second torsion spring 83. As shown in Fig. 6, the safety block 81 includes a handle abutting surface 81-1, an impact surface 81-2, a working surface 81-3, an abutting block 81-4, an auxiliary block 81-5, and a torsion spring groove 81-6. A torsion spring groove 81-6 is formed between the abutting block 81-4 of the safety block 81 and the auxiliary block 81-5; the abutting block 81-4 and the auxiliary block 81-5 are each provided with a pin hole; the operation of the safety block 81 The face 81-3 is located on the abutting block 81-4.

1 to 3 and FIG. 6, the second torsion spring 83 is located in the torsion spring groove 81-6; the safety block pin 82 sequentially passes through the pin hole of the auxiliary block 81-5, the second torsion spring 83, and the top After the pin hole of the block 81-4, the right end protrudes into the right housing 54 and the left end projects into the left housing 53, so that the safety block 81 is rotatably coupled to the fixed handle 55 via the safety block pin 82.

After the second torsion spring 83 is fitted over the safety pin 82, one end of the second torsion spring 83 abuts against the safety block 81, and the other end abuts against the handle pin 62 of the movable handle 61.

When the control panel 73 is in the non-fired position, the safety block 81 is engaged by the handle abutting surface 81-1 and the working surface 81-3 between the movable handle 61 and the blocking portion 73-4 of the side plate 73-1 of the control board 73. At this time, the handle of the safety block 81 is directed downward in the direction of the top surface 81-1, the direction of the impact surface 81-2 is rearward, and the direction of the working surface 81-3 is upward.

When the control board 73 is in the fired position, the safety block 81 is rotated by the second torsion spring 83 to pass through the release notch of the notch portion 73-3 of the side plate 73-1 of the control board 73, and the impact surface 81-2 is The downward end face of the fixed handle 55 Contact.

The pointer assembly 90 includes a pointer 91 and a third torsion spring 93. As shown in Fig. 7, the pointer 91 includes a pin sleeve 91-1, a needle 91-2, a dial block 91-3, and a torsion spring block 91-4.

Referring to Figures 1 to 3, Figure 5 and Figure 7, the right housing 54 is provided with a pointer pin. The pointer 91 is rotatably coupled to the right housing 54 by its pin sleeve 91-1 being fitted over the pointer pin of the right housing 54. The third torsion spring 93 is also fitted over the pointer pin of the right housing 54 and is located below the pin sleeve 91-1 of the pointer 91. One end of the third torsion spring 93 is in elastic contact with the right housing 54 and the other end is in elastic contact with the torsion spring block 91-4 of the pointer 91. The hook portion 73-2 of the control board 73 is hooked to the pointer 91, and the pointer 91 can be hooked by the hook portion 73-2 of the control board 73 by its dial block 91-3 and rotated forward and backward with the control board 73. The tip of the pointer 91 is located at the window 54-1 of the right housing 54.

(Example 2, stapler)

Referring to Figures 1 through 7, the tubular stapler of the present embodiment includes an anvil assembly 10, a staple and a stapler body. The stapler body was obtained from Example 1.

The abutment assembly 10 includes a steel anvil 11 and a connecting sleeve 12, and the connecting sleeve 12 is fixedly coupled to the abutment 11.

The use of the tubular stapler of the present embodiment is as follows: Prior to surgery, the staples are loaded into the staple cartridge cover 42 of the cartridge assembly 40. During the operation, the head of the stapler assembly 10 of the stapler is inserted into the tubular tissue of the digestive tract from the side slit of a fracture of the tubular tissue of the human digestive tract to be sutured, and protrudes from the fracture, and then the nail is stabbed. The seat assembly 10 extends into the other break and the purse is tied to the connecting sleeve 12 for the two breaks.

The adjusting nut 71 of the control assembly 70 is rotated counterclockwise, so that the top shaft 21 of the coupling assembly 20 projects forwardly from the fixing seat 41 of the cartridge assembly 40, and the connecting sleeve 12 of the abutment assembly 10 is manually set. It is caught on the front end of the top shaft 21. Then, the adjusting nut 71 is rotated clockwise, and the coupling assembly 20 is moved backwards, and the abutment assembly 10 is simultaneously moved backward to extend into the central sleeve 41-2 of the fixing base 41. The two fractures to be anastomosed are brought close to each other.

In the above-described process of rotating the adjusting nut 71 in the clockwise direction, the upwardly facing working surface 81-3 of the safety block 81 is blocked by the blocking portion 73-4 of the side plate 73-1 of the control panel 73 during the first period of time. Although the second torsion spring 83 causes the safety block 81 to have a clockwise rotation tendency (viewed from the top to the bottom), it cannot be rotated due to the blocking of the control panel 73. As the adjusting nut 71 rotates, the rear pressing member 24 fixed to the rear axle 23 comes into contact with the rear plate 73-5 of the control board 73, which in turn drives the control panel 73 to translate backward until the control panel 73 moves to its notch. The notch of the portion 73-3 is located above the safety block 81. At this time, under the torsion of the second torsion spring 83, the safety block 81 is rapidly rotated to collide with the downward facing end surface of the fixed handle 55 by the impact surface 81-2. And the sound of a crash.

In conjunction with the above-described process, in the above-described process of rotating the adjusting nut 71 in the clockwise direction, as the control plate 73 moves rearward, the hook portion 73-2 of the control plate 73 is rearwardly moved closer to the pointer until it passes. The dial block 91-3 of the pointer 91 pulls the pointer 91 to rotate the pointer 91 to its safe tip to the safe green area of the window provided on the fixed handle 55, and the display pointer 91 is interlocked with the safety block 81 to alert the operator through the pointer. At this point, the anastomosis area has been entered, and the anastomosis cutting can be performed according to the regulations, thereby further making the operation of the stapler safe and reliable. At this time, the movable handle 61 is pressed, and the movable handle 61 sequentially drives the dial base 32 of the push rod assembly 30, and then the push rod 32 drives the push rod 31 to push the push holder assembly 40 to push the nail base 43 backward and forward. The forward movement of the pusher seat 43 causes the respective anastomosis needles and the annular knife 44 to move forward; when the staple needles suture the sutures to be sutured together by the anvils 11, the annular knife 44 also cuts off excess human tissue, thereby A reliable suture connection to the human tissue is achieved, and the cut human tissue is attached to the connecting sleeve 12 due to the loaded purse. At this point, when the stapler body is taken out from the side notch, since the connecting sleeve 12 in the abutment assembly 10 is sleeved on the top shaft 22, when the stapler body is taken out, the anvil assembly 10 is cut together The human tissue is removed together, and the lateral incision of the tubular tissue is sutured and other corresponding sutures are performed to complete the operation.

Claims

Claim

A tubular stapler body having a safety device comprising a shaft assembly (20), a push rod assembly (30), a cartridge assembly (40), a housing assembly (50), a movable handle (61), an adjustment Nut (71), compression spring (72), safety block (81) and pointer (91);

The sleeve (31-1) at the front end of the push rod (31) of the push rod assembly (30) is placed over the top shaft of the shaft assembly (20)

(21) is axially slidably coupled to the top shaft (21); the front portion of the top shaft (21) of the shaft assembly (20) is located in the central sleeve of the fixing seat (41) of the cartridge assembly (40) ( 41-2) and can move axially relative to the central casing (41-2); the front end of the casing (31-1) of the pusher (31) of the pusher assembly (30) extends into the cartridge assembly (40) The rear end opening of the outer casing (41-1) of the fixing base (41) is placed at the rear end of the push pin holder (43) of the cartridge assembly (40) and is fastened to the push pin holder (43). ;

The outer casing member (50) includes an elbow (51), a left casing (53) and a right casing (54); the elbow (51) is fitted over the axle assembly (20) and the pusher assembly (30), and The front end is fixedly connected with the fixing housing (41-1) of the cartridge assembly (40); the left housing (53) and the right housing (54) are fastened together to form a fixed handle (55), the fixing handle (55) Enclosed in the axle assembly (20) and the push rod assembly (30), and the front end of the fixed handle (55) is fixedly connected to the rear end of the elbow (51);

The movable handle (61) is rotatably coupled to the fixed handle (55) by a handle pin (62), the first torsion spring (63) is fitted over the handle pin (62), and one end thereof abuts against the handle of the movable handle (61) The other end is abutted against the first torsion spring stop pin (64); the first torsion spring stop pin (64) is disposed on the fixed handle (55); the forked end of the movable handle (61) (61-4) Insert into the toggle seat (32) of the push rod assembly (30);

The rear end of the fixed handle (55) is rotatably connected to the adjusting nut (71), and the fixing handle (55) and the adjusting nut (71) are axially restrained from each other, and the front part of the adjusting nut (71) is located at the fixed handle (55) And threadedly connected to the lead screw (23-2) of the rear axle (23) of the shaft assembly (20);

A control board (73) is further included; the control board (73) is a right-angled board body including side plates (73-1) and rear plates (73-5) at right angles to each other, and the side plates (73-1) include from the front to the The hook portion (73-2), the notch portion (73-3), and the blocking portion (73-4) are sequentially disposed, and the hook portion (73-2) is hooked to the right, and the notch portion (73-3) ) The direction of the notch is also to the right; the plate of the rear plate (73-5) is provided with a through hole; the control plate (73) is sleeved by the through hole of the rear plate (73-5) on the shaft assembly (20) The screw (23-2) of the rear axle (23) is located behind the rear pressing member (24) of the axle assembly (20); the compression spring (72) is also fitted to the screw of the rear axle (23) ( 23-2) Upper, and its front end is in elastic contact with the rear end surface of the rear plate (73-5) of the control board (73), and the front end surface of the rear plate (73-5) of the control board (73) is closed by the right casing ( 54) The baffle limit, the right side edge of the side plate (73-1) of the control board (73) protrudes into the limit groove of the right casing (54) and is restricted in the up and down direction, and Relative to the limit groove sliding forward and backward in a non-fired position and a fired position; compression spring (72) The rear end is abutted on the baffles of the left and right housings (53) and 54;

The safety block (81) is rotatably connected to the fixed handle (55) through the safety block pin (82), the second torsion spring (83) is sleeved on the safety block pin (82), and the second torsion spring (83) One end is on the safety block (81) and the other end is On the handle pin (62) of the movable handle (61); the safety block (81) has a handle abutting surface (81-1), an impact surface (81-2) and a working surface (81-3); when the control panel ( 73) When in the non-fired position, the safety block (81) is caught by the handle against the top surface (81-1) and the working surface (81-3) on the movable handle (61) and the side panel of the control panel (73) (73) -1) Between the blocking parts (73-4), at this time, the handle of the safety block (81) is directed downward (81-1), the direction of the impact surface (81-2) is backward, and the working surface (81-3) The direction is upward; when the control board (73) is in the firing position, the safety block (81) is rotated by the second torsion spring (83) through the side plate of the control board (73) (73-1) The notch portion (73-3) is released from the notch and is in contact with the fixed handle (55) by its impact surface (81-2);

The pointer (91) is rotatably coupled to the right housing (54) by the pointer pin, and the tip of the pointer (91) is located at the window (54-1) of the right housing (54); the third torsion spring (93) is The pointer (91) is coaxially disposed with one end abutting against the right housing (54) and the other end abutting the pointer; the hook portion (73-2) of the control board (73) is hooked toward the pointer (91).

2. The tubular stapler body with a safety device according to claim 1, wherein: the safety block (81) comprises an abutting block (81-4) and an auxiliary block (81-5), in the abutting block (81-4) A torsion spring groove (81-6) is formed between the auxiliary block (81-5); a pin hole is provided for the abutting block (81-4) and the auxiliary block (81-5); Piece

The working face (81-3) of (81) is located on the top block (81-4), and the second torsion spring (83) is located in the torsion spring groove (81-6); the safety pin (82) passes through After the pin hole of the auxiliary block (81-5), the second torsion spring (83) and the pin hole of the abutting block (81-4), the right end protrudes into the right casing (54), and the left end extends into the In the left housing (53).

3. The tubular stapler body with a safety device according to claim 1 or 2, wherein: the pointer (91) comprises a pin bushing (91-1), a needle body (91-2), and a dial block. (91-3) and torsion spring block (91-4); the pointer pin is disposed on the right housing (54); the pointer (91) is sleeved in the right housing (54) by the pin sleeve (91-1) The pointer pin is rotatably connected to the right housing (54); the pointer (91) is elastically contacted by the torsion spring block (91-4) and the third torsion spring (93); the pointer (91) can be moved by The block (91-3) is hooked by the hook portion (73-2) of the control board (73) and rotated forward and backward with the control board (73).

4. The tubular stapler body with a safety device according to claim 1, wherein: the rear pressing member (24) of the coupling assembly (20) is a U-shaped clamping plate; the rear pressing member (24) has The waist is rounded, and the rear pressing member (24) is fixed to the optical axis (23-1) of the rear axle (23) by a screw passing through the waist circular hole of the rear pressing member (24), and is located at the optical axis (23). -1) The back end.

5. A tubular stapler having a safety device, comprising an anvil assembly (10), a staple and a stapler body; the stapler body comprising a shaft assembly (20), a push rod assembly (30), and a cartridge assembly (40), housing assembly (50), movable handle (61), adjusting nut (71), compression spring (72), safety block (81) and pointer (91);

(21) is axially slidably coupled to the top shaft (21); the front portion of the top shaft (21) of the shaft assembly (20) is located in the central sleeve of the fixing seat (41) of the cartridge assembly (40) ( 41-2) and can move axially relative to the central casing (41-2); the front end of the casing (31-1) of the pusher (31) of the pusher assembly (30) extends into the cartridge assembly (40) The rear end opening of the outer casing (41-1) of the fixing base (41) is placed at the rear end of the push pin holder (43) of the cartridge assembly (40) and is fastened to the push pin holder (43). ; The outer casing member (50) includes an elbow (51), a left casing (53) and a right casing (54); the elbow (51) is fitted over the axle assembly (20) and the pusher assembly (30), and The front end is fixedly connected with the fixing housing (41-1) of the cartridge assembly (40); the left housing (53) and the right housing (54) are fastened together to form a fixed handle (55), the fixing handle (55) Enclosed in the axle assembly (20) and the push rod assembly (30), and the front end of the fixed handle (55) is fixedly connected to the rear end of the elbow (51);

The rear end of the fixed handle (55) is rotatably connected to the adjusting nut (71), and the fixing handle (55) and the adjusting nut (71) are axially restrained from each other, and the front part of the adjusting nut (71) is located at the fixed handle (55) And threadedly connected to the screw (23-2) of the rear axle (23) of the shaft assembly (20);

In use, the staple is located in the staple cartridge cover (42) of the cartridge assembly (40), and the connection sleeve (12) of the anvil assembly (10) is clamped to the front end of the top shaft (21) and is located in the cartridge assembly (40) The central housing (41-2) of the mount (41); characterized by:

The safety block (81) is rotatably connected to the fixed handle (55) through the safety block pin (82), the second torsion spring (83) is sleeved on the safety block pin (82), and the second torsion spring (83) One end abuts the safety block (81) and the other end abuts the handle pin (62) of the movable handle (61); the safety block (81) has a handle abutting surface (81-1) and an impact surface (81-2) And the working surface (81-3); when the control panel (73) is in the non-fired position, the safety block (81) is caught by the handle against the top surface (81-1) and the working surface (81-3) on the movable handle ( 61) Between the blocking portion (73-4) of the side plate (73-1) of the control board (73), at this time, the handle of the safety block (81) is pressed downward against the top surface (81-1). The direction of the face (81-2) is upwards and the direction of the work face (81-3) is upward; when the control panel (73) is in the fired position, the safety block (81) is rotated by the second torsion spring (83) Passing through the notch portion (73-3) of the side plate (73-1) of the control panel (73) and contacting the fixed handle (55) by the impact surface (81-2);

The pointer (91) is pivotally connected to the right housing (54) by the pointer pin, and the tip of the pointer (91) is located a window (54-1) of the right casing (54); a third torsion spring (93) is disposed coaxially with the pointer (91) and has one end abutting against the right casing (54) and the other end abutting the pointer; The hook portion (73-2) of the control board (73) is hooked toward the pointer (91).

6. A tubular stapler with a safety device according to claim 5, wherein the safety block (81) comprises an abutting block (81-4) and an auxiliary block (81-5), in the abutting block ( 81-4) A torsion spring groove (81-6) is formed between the auxiliary block (81-5); a pin hole is provided for the abutting block (81-4) and the auxiliary block (81-5); The working face (81-3) of (81) is located on the top block (81-4), and the second torsion spring (83) is located in the torsion spring groove (81-6); the safety pin (82) passes through After the pin hole of the auxiliary block (81-5), the second torsion spring (83) and the pin hole of the abutting block (81-4), the right end protrudes into the right casing (54), and the left end extends into the In the left housing (53).

7. A tubular stapler having a safety device according to claim 6 or 2, wherein: the pointer (91) comprises a pin bushing (91-1), a needle body (91-2), and a dial block ( 91-3) and torsion spring block (91-4); the pointer pin is arranged on the right housing (54); the pointer (91) is sleeved on the right housing (54) by the pin sleeve (91-1) The pointer pin is rotatably connected to the right housing (54); the pointer (91) is elastically contacted by the torsion spring block (91-4) and the third torsion spring (93); the pointer (91) can be moved by the block (91-3) Hooked by the hook portion (73-2) of the control board (73) and rotated forward and backward with the control board (73).

8. The tubular stapler with a safety device according to claim 5, wherein: the shaft assembly

(20) The rear pressing member (24) is a U-shaped clamping plate; the rear pressing member (24) has a waist circular hole, and the rear pressing member is passed by a screw passing through the waist circular hole of the rear pressing member (24). ) Fixed on the optical axis (23-1) of the rear axle (23) and at the rear end of the optical axis (23-1).