WO2013091512A1

WO2013091512A1 - Firing mechanism for surgical linear cutting anastomat

Info

Publication number: WO2013091512A1
Application number: PCT/CN2012/086643
Authority: WO
Inventors: 张祖仁; 李苏英; 杨卫民; 刘兴芳; 芮龙; 张奕奕; 徐维华
Original assignee: 常州市康迪医用吻合器有限公司
Priority date: 2011-12-21
Filing date: 2012-12-14
Publication date: 2013-06-27

Abstract

A firing mechanism (8, 51) for a surgical linear cutting anastomat (7), comprising push buttons (12, 13, 55); the push buttons (12, 13, 55) can be a single L-shaped push button (55), or two push buttons (12, 13) respectively arranged at the left and right sides of a staple cartridge holder (14); when the push buttons (12, 13, 55) are pushed forward or backward, the resilient push button locks (34, 60) located in sliders (23, 56) restrict the positions of the push buttons (12, 13, 55) on the sliders (23, 56); when the sliders (23, 56) move forward to execute the firing operation, the push part of the push buttons (12, 13, 55) is close to the origin of force between the arc-shaped grooves (31, 32, 58) of the push buttons (12, 13, 55) and the arc-shaped fins (33, 59) of the sliders (23, 56) in the staple cartridge holder (14), thus reducing the deformation of the sliders (23, 56) and the torque-generated friction force between the sliders (23, 56) and the staple cartridge holder (14), and as a result reducing the resistance of the firing mechanism (8, 51) during the cutting anastomose execution process.

Description

Surgical mechanism for surgical linear cutting stapler

The present invention relates to a firing mechanism in various surgical linear cutting staplers. Background technique

Various surgical linear cutting staplers have been used to replace needle-to-hand anastomosis in surgical procedures and are being widely used in the end, end and side of organs and tissues such as human digestive tract organs, respiratory organs and genitourinary organs. Surgery and other operations, the formation of the organ channel surgery and closed incision surgery, especially suitable for the anastomosis of organs and tissues that are difficult to expose and operate, can reduce the operation time and improve the quality of surgery.

As described in U.S. Patent Publication Nos. 20080116244, 20090308909 and 20110155787: various known surgical linear cutting staplers consist of a cartridge assembly, an anvil assembly and a clamping hook. The staple cartridge assembly has a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism mounted within the staple cartridge holder. The staple cartridge is linear and can be either linear or curved. Pusher blocks and staples are mounted in the staple cartridge. A plurality of staples are staggered in two or more rows within the staple cartridge. There are pressure blocks on the nail holder. The firing mechanism consists of a push button, a slider, a push plate, a pusher and a cutter, wherein the cutter can be installed according to the needs of use. The anvil assembly has an anvil and a nail anvil. The anvil can be made in one piece with the anvil frame. The anvil is linear and can be either linear or curved. An anastomosis forming groove corresponding to the position of the staple in the staple cartridge is arranged on the surface of the anvil. A plurality of staple forming grooves are staggered in two or more rows on the surface of the anvil. The clamping hook is pivotally connected to the magazine holder. After the staple cartridge assembly and the anvil assembly are closed together, the clamping hook is pivoted around the staple cartridge frame such that the clamping hook hooks the staple anvil frame, so that the cartridge assembly and the anvil assembly are clamped by the clamping hook, The tissue to be anastomosed is clamped between the anvil and the staple cartridge.

As described in U.S. Patent Publication No. 20090308909: The push button attachment of the firing mechanism of the surgical linear cutting stapler is located on one side of the cartridge assembly. When the push button of the firing mechanism pushes the slider forward in the magazine frame, the slider pushes the push plate forward in the magazine frame, and the push plate pushes the pusher and the cutter to move forward in the magazine frame. The pusher slanting pushes the pusher blocks in turn to push the staples out of the staple cartridge. When the pusher block pushes the staple from the staple cartridge, the nail tip of the staple is pressed against the forming groove of the anvil, so that the two staple legs of the staple are bent along the forming groove to achieve the operation of anastomosis of the tissue. purpose. In order to ensure the purpose of the surgery to accurately match the tissue to be anastomosis, the push button of the firing mechanism needs to continuously push about 80 staples from the staple cartridge without stopping, and the two staple legs of the staple are along The forming groove is curved and the force exerted by the surgeon on the push button is large. The unsatisfactory aspect of the firing mechanism of this type of surgical linear cutting stapler is: When the cartridge assembly and the anvil assembly are clamped by the clamping hook, the tissue to be anastomosis is clamped between the anvil and the staple cartridge At the time of the anatomical position of the tissue to be anastomosed, the position of the push button placed on one side may not be convenient for the surgeon to exert a force on the push button, thereby affecting the surgical requirements for achieving an accurate anastomosis of the tissue to be anastomosed. As described in U.S. Patent Publication No. 20080116244: The M-shaped push button of the firing mechanism of the surgical linear cutting stapler can be pivoted about a slider mounted within the cartridge holder. When the M-shaped push button rotates around the pivot of the slider, the M-shaped push button can protrude from the left side of the magazine holder or protrude to the right side of the magazine holder, so that the surgeon can choose to apply the action to the M-shaped push. The position of the force on the button. As described in U.S. Patent Publication No. 20110155787: The push button of the firing mechanism of the surgical linear cutting stapler can be pivoted about a slider mounted within the cartridge holder. When the push button is pivoted about the slider, the push button can either protrude to the left side of the magazine holder or protrude to the right side of the magazine holder. Since the push button is located at the tail of the staple cartridge frame, the push button does not protrude to either side of the staple cartridge holder during the operation of clamping the tissue to be stapled, and does not affect the surgeon's application of the force to the clamp hook; At the same time, it is convenient for the surgeon to select the position of the push button to apply the force. The unsatisfactory part of the firing mechanism of the above-mentioned several types of surgical linear cutting staplers is: Since the pushing operation is performed when the push button is advanced, the pushing position of the push button is away from the push button and the slider in the staple cartridge frame. The force is farther away. Therefore, the force exerted by the push button on the slider forms a thrust and useless torque that is useful for cutting the anastomosis. The torque increases the friction between the slider and the cartridge holder and the deformation of the slider, thereby increasing The resistance of the firing mechanism of the firing mechanism of the firing mechanism. Therefore, the firing mechanism of the surgical linear cutting stapler needs to be improved.

It is apparent from the above that a large number of different types of surgical linear cutting staplers have been designed, and the development of a new surgical linear cutting stapler firing mechanism continues to be used for surgical linear cutting that is used annually in the world. The stapler is further improved to achieve a more convenient, less laborious, more reliable, more convenient surgical procedure for the surgeon to apply force and without reducing the surgical adaptation of the surgical linear stapler. Summary of the invention

The object of the present invention is to provide a firing mechanism for a surgical linear cutting stapler, wherein when the L-shaped push button is in a state to be fired, the chassis of the elastic push button lock in the slider is inserted into the proximal end of the bottom of the staple cartridge frame. Inside, the slider is restrained at the proximal end of the staple cartridge frame, and at the same time, the axis of the elastic push button lock is disengaged from the curved groove of the L-shaped push button, so that the curved groove of the L-shaped push button can be along the curved wing of the slider Pivot so that the L-shaped push button can be unfolded either to the left side of the magazine holder or to the right side of the magazine holder; when the L-shaped push button is pushed, the force acting on the L-shaped push button overcomes The proximal end of the bottom of the staple holder frame constrains the chassis of the elastic push button lock in the slider, so that the L-shaped push button can push the slider to move back and forth in the staple cartridge frame, and the axis of the elastic push button lock moves up Insert the L-shaped push button in the arc groove; When the L-shaped push button moves forward to perform the firing operation, the L-shaped push button pushes the arcuate fin of the slider through the curved groove to move the slider forward in the magazine frame, sliding The block pushes the push plate forward in the nail holder frame, and the push plate pushes the push nail and the cutting knife in the nail Inner frame moves forward, push the staple pushing in turn the respective inclined wedge staple pushing block within the staple out of the staple cartridge; when shifting the L-shaped push button reset operation is performed, since the elastic push button lock shaft inserted in the slide The curved groove of the L-shaped push button prevents the curved groove of the L-shaped push button from pivoting along the curved wing of the slider. At this time, the L-shaped push button drives the elastic push in the sliding block through the curved groove. The shaft of the button lock moves the slider backwards in the magazine frame, and the slider pushes the push plate to move backwards in the magazine frame, and the push plate pushes the pusher and the cutter to move backward in the magazine frame until the elastic The chassis of the push button lock is inserted into the proximal hole of the bottom of the staple holder frame, and the slider is restrained at the proximal end of the staple cartridge holder to reset the firing mechanism. Thus, when the L-shaped push button is pushed forward or backward, the elastic push button lock in the slider restrains the position of the L-shaped push button on the slider; when the L-shaped push button advances to perform the firing operation, the L-shaped push The pushing position of the button is closer to the arcing groove of the L-shaped push button and the arc-shaped wing of the slider in the magazine frame, so as to minimize the friction between the slider and the magazine frame caused by the torque. The deformation of the slider achieves the effect of reducing the resistance of the firing mechanism when performing the operation of cutting the anastomosis.

The object of the present invention is to provide a firing mechanism for another surgical linear cutting stapler, wherein the push button is two push buttons arranged on the left and right sides of the staple cartridge frame; when the left and right push buttons are in a state to be fired, The chassis of the elastic push button lock in the slider is inserted into the proximal hole of the bottom of the nail holder frame, and the slider is restrained at the proximal end of the nail holder frame, and at the same time, the left and right convex blocks of the elastic push button lock and the middle of the push button The restraining groove is disengaged, so that the curved grooves of the left and right push buttons can be pivoted along the curved wings of the slider respectively, and the push button on the left side of the magazine frame can be unfolded to the left side of the magazine frame, or The push button on the right side of the staple cartridge frame is unfolded to the right side of the staple cartridge holder, and the two push buttons on both sides of the staple cartridge holder can be respectively unfolded to the left and right sides of the staple cartridge holder; when the push button is started, the function is The force on the push button overcomes the constraint of the proximal hole of the bottom of the staple cartridge frame on the chassis of the elastic push button lock in the slider, so that the push button pushes the slider to move back and forth in the staple cartridge frame, and at the same time, the elastic push button lock The left and right bumps are moved up and inserted into the restraining grooves in the middle of the left and right push buttons, The two push buttons rotate around the elastic push button lock in the slider; when the push button moves forward to perform the firing operation, the push button pushes the arcuate fin of the slider through the arc groove so that the slider is in the staple frame Before moving, the slider pushes the push plate forward in the nail holder frame, and the push plate pushes the push nail and the cutting knife to move forward in the nail holder frame, pushes the nail and then pushes each push nail block to staple the nail. Pushing out from the staple cartridge; when the push button is moved backward to perform the reset operation, since the left and right lugs of the elastic push button lock in the slider are inserted into the restraining groove in the middle of the push button, the curved groove of the push button cannot be along the slider The curved wings pivot. At this time, the push button drives the bump of the elastic push button lock in the slider through the middle restraint groove to move the slider backward in the nail cartridge frame, and the slider pushes the push plate to move backward in the nail cartridge frame, pushing the plate again. Push the pusher slant and the cutting knife to move backwards in the staple cartridge frame until the chassis of the elastic push button lock is inserted into the proximal hole of the bottom of the staple cartridge frame, and the slider is restrained at the proximal end of the staple cartridge frame, which will be fired Mechanism reset. Thus, when the push button is pushed forward or backward, the elastic push button lock in the slider restricts the position of the push button on the slider; when the push button is moved forward to perform the firing operation, the push portion of the push button is away from the push button The arc groove is closer to the force of the arcuate fin of the slider in the magazine frame, and the friction between the slider and the cartridge frame and the deformation of the slider are reduced as much as possible, thereby reducing the firing mechanism. The effect of the resistance when performing the operation of cutting the anastomosis.

The task of the present invention is achieved by the following technical solutions:

The surgical linear cutting stapler consists of a staple cartridge assembly, an anvil assembly, and a clamping hook. The staple cartridge assembly has a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism mounted within the staple cartridge holder. The staple cartridge is linear and can be either linear or curved. Pusher blocks and staples are mounted in the staple cartridge. A plurality of staples are staggered in two or more rows within the staple cartridge.

The anvil assembly has an anvil and a nail anvil. The anvil can be made in one piece with the anvil frame. The anvil is linear and can be either linear or curved. An anastomosis forming groove corresponding to the position of the staple in the staple cartridge is arranged on the surface of the anvil. A plurality of staple forming grooves are staggered in two or more rows on the surface of the anvil.

The clamping hook is pivotally connected to the staple cartridge holder. After the cartridge assembly and the anvil assembly are brought together, the clamping hook pivots about the cartridge holder such that the clamping hook hooks the staple anvil and clamps the cartridge assembly to the anvil assembly.

The firing mechanism of the surgical linear cutting stapler of the present invention is composed of a push button, a slider, a push plate, a pusher and a cutter. The push button can be a single L-shaped push button or two push buttons arranged on the left and right sides of the staple cartridge holder.

The push button of the surgical linear cutting stapler of the present invention may be a single L-shaped push button. The L-shaped push button has an arc-shaped groove, and the distal end of the slider has an arc-shaped fin which is unfolded to the left and right sides of the magazine frame, and the arc-shaped groove of the L-shaped push button is inserted on the curved wing of the slider. When the curved groove of the L-shaped push button pivots along the curved wing of the slider, the L-shaped push button can be unfolded either to the left side of the magazine holder or to the right side of the magazine frame.

The proximal end of the slider can have a resilient push button lock that is constrained to move up and down within the slider. The push button lock has a chassis, shaft and spring. The proximal end of the bottom of the staple cartridge can have holes. When the L-shaped push button is in the state to be fired, the chassis of the elastic push button lock in the slider is inserted into the proximal hole of the bottom of the nail cartridge frame, and the slider is restrained at the proximal end of the staple cartridge frame, and at the same time, the elastic push The shaft of the button lock is disengaged from the arcuate groove of the L-shaped push button, so that the arcuate groove of the L-shaped push button can be pivoted along the curved wing of the slider so that the L-shaped push button can be directed to the left side of the magazine holder Expand, or you can expand to the right side of the magazine rack.

The proximal end of the push plate can be hooked, and the L-shaped push button can have a curved step. The hook of the proximal end of the push plate is inserted into the curved step on the L-shaped push button, and the L-shaped push button is constrained to pivot on the slider.

When the L-shaped push button is pushed, the force acting on the L-shaped push button overcomes the constraint of the proximal hole of the bottom of the cartridge holder against the chassis of the elastic push button lock in the slider, so that the L-shaped push button pushes the slider Move back and forth in the staple holder frame, and at the same time, the axis of the elastic push button lock is moved up into the arcuate groove of the L-shaped push button.

When the L-shaped push button is moved forward to perform the firing operation, the L-shaped push button pushes the curved wing of the slider through the curved groove to move the slider forward in the magazine frame, and the slider pushes the push plate, pushes the hammer and The cutting knife moves forward in the staple holder frame, and the push nail obliquely pushes each push nail block to push the staples out of the staple cartridge.

When the L-shaped push button is moved backward to perform the reset operation, since the axis of the elastic push button lock in the slider is inserted into the arcuate groove of the L-shaped push button, the arc groove of the L-shaped push button cannot be along the arc of the slider. The wing is pivoted. At this time, the L-shaped push button drives the shaft of the elastic push button lock in the slider through the arc groove, so that the slider moves backward in the staple cartridge frame until the chassis of the elastic push button lock is pushed into the staple cartridge. Inside the proximal hole of the bottom of the frame, the slider is restrained at the proximal end of the cartridge holder to reset the firing mechanism.

Thus, when the L-shaped push button is pushed forward or backward, the elastic push button lock in the slider restrains the position of the L-shaped push button on the slider; when the L-shaped push button advances to perform the firing operation, the L-shaped push The pushing position of the button is closer to the arcing groove of the L-shaped push button and the arc-shaped wing of the slider in the magazine frame, so as to minimize the friction between the slider and the magazine frame caused by the torque. The deformation of the slider achieves the effect of reducing the resistance of the firing mechanism when performing the operation of cutting the anastomosis.

The push button of the surgical linear cutting stapler of the present invention may also be two push buttons arranged on the left and right sides of the staple cartridge holder. The middle of the two push buttons respectively have a pivot hole and a constraining groove, and the front bottom has an arc groove respectively, and the distal end of the slider has an arc-shaped fin which is unfolded to the left and right sides of the pin holder frame, and the arc groove of the push button can be inserted. On the curved wings of the slider. The middle of the slider can have an elastic push button lock that is constrained to move up and down within the slider. The elastic push button lock has a chassis, pivot, spring and left and right bumps. The two push buttons are placed one above the other and placed over the pivot of the elastic push button lock in the middle of the slider through the pivot hole. Thus, the two push buttons can each pivot about the push button lock. The proximal end of the bottom of the staple cartridge can have holes.

When the left and right push buttons are in the state to be fired, the chassis of the elastic push button lock in the slider is inserted into the proximal hole of the bottom of the staple cartridge frame to restrain the slider at the proximal end of the staple cartridge frame, and at the same time, elasticity The left and right lugs of the push button lock are disengaged from the restraining grooves in the middle of the push button, so that the curved grooves of the left and right push buttons can be pivoted along the curved wings of the slider respectively, and the push button on the left side of the staple cartridge frame can be Unfolding to the left side of the magazine rack, you can also push the push button on the right side of the magazine rack to the right side of the magazine rack. You can also push the two push buttons on both sides of the magazine rack to the left and right of the magazine rack. Side deployment.

The proximal side of the slider may have a resilient projection, and the bottoms of the two push buttons may have grooves respectively. When the push buttons are close to the side of the staple cartridge holder, the elastic projections of the slider are pushed into the grooves of the push button to restrain the push button on the slider. When the respective push buttons are pivoted around the elastic push button lock toward the outside of the cartridge holder, the grooves of the push button are moved out of the elastic projections of the slider.

The proximal end of the push plate may have a hook, and the push button mounted on the upper portion of the slider may have a curved step. The hook of the proximal end of the push plate is inserted on the curved step mounted on the push button on the upper part of the slider, and the left and right push buttons are constrained to pivot on the slider.

When the push button is pushed, the force acting on the push button overcomes the constraint of the proximal hole of the bottom of the staple cartridge frame to the chassis of the elastic push button lock in the slider, so that the push button pushes the slider back and forth in the staple cartridge frame Moving, at the same time, the left and right lugs of the elastic push button lock are respectively inserted into the restraining grooves in the middle of the left and right push buttons to prevent the two push buttons from pivoting around the elastic push button locks in the slider.

When the push button is moved forward to perform the firing operation, the push button pushes the arcuate fin of the slider through the curved groove to move the slider forward in the staple cartridge frame, and the slider pushes the push plate, push the nail and the cutter at the nail The inside of the warehouse rack moves forward, pushes the nail and then pushes each pusher block to push the staples out of the staple cartridge.

When the push button is moved backward to perform the reset operation, since the left and right lugs of the elastic push button lock in the slider are inserted into the restraining groove in the middle of the push button, the curved groove of the push button cannot be pivoted along the curved wing of the slider. Turn. At this time, the push button drives the protrusion of the elastic push button lock in the slider through the middle restraint groove to move the slider backward in the staple cartridge frame until the chassis of the elastic push button lock is pushed into the nail Inside the proximal hole of the bottom of the bin, the slider is restrained at the proximal end of the cartridge holder to reset the firing mechanism.

Thus, when the push button is pushed forward or backward, the elastic push button lock in the slider restricts the position of the push button on the slider; when the push button is moved forward to perform the firing operation, the push portion of the push button is away from the push button The arc groove is closer to the force of the arcuate fin of the slider in the magazine frame, and the friction between the slider and the cartridge frame and the deformation of the slider are reduced as much as possible, thereby reducing the firing mechanism. The effect of the resistance when performing the operation of cutting the anastomosis.

The proximal end of the push plate of the surgical linear cutting stapler of the present invention and the slider may have a hole, and the two sides of the nail cartridge frame have long grooves, and the pin is inserted into the hole of the push plate and the slider and the long groove of the staple frame Inside, the slider can push the push plate to move back and forth in the staple cartridge frame by the pin.

The distal end of the push plate can have a U-shaped fork. There can be a U-shaped groove on the pusher slant. The distal end of the push plate is inserted into the u-shaped groove on the pusher slant, so that the push plate can push the pusher slant to move back and forth in the staple frame.

The middle of the push plate can have a long groove. There may be locating pins in the middle of the cartridge holder. The locating pin in the middle of the cartridge holder is inserted into the long slot of the push plate. When the push button is in the position to be fired, the positioning pin in the middle of the magazine holder is stopped at the distal end of the long groove of the push plate, and the restraining push plate can only move forward in the magazine frame. When the push button is in the finished firing position, the locating pin in the middle of the cartridge holder is placed at the proximal end of the long slot of the push plate, and the restraining push plate can only be moved rearwardly within the cartridge holder. DRAWINGS

1 is a view showing the appearance of a surgical linear cutting stapler according to a first embodiment of the present invention when the cartridge assembly and the anvil assembly are in a clamped state, and when the two push buttons are respectively deployed to the left and right sides of the cartridge holder; ;

Figure 2 is a perspective view showing the surgical linear cutting stapler of Figure 1 when the right push button is deployed to the right side of the staple cartridge holder and the left push button is brought closer to the side of the staple cartridge holder;

Figure 3 is a perspective view showing the surgical linear cutting stapler of Figure 1 when the left push button is deployed to the left side of the staple cartridge holder and the right push button is brought closer to the side of the staple cartridge holder;

Figure 4 is an external view showing the push button of the surgical linear cutting stapler of Figure 2 in the completed firing position; Figure 5 is a view showing the cartridge assembly of the surgical linear cutting stapler of Figure 2 removed from the housing, the staple cartridge and some accessories Appearance picture;

Figure 6 is an external view showing the bottom surface of the cartridge assembly of Figure 5;

Figure 7 is a plan view showing the push button, the slider, the elastic push button lock and the push plate of Figure 5;

Figure 8 is a cross-sectional view taken along line 8-8 of the push button, the slider, the elastic push button lock and the push plate of Figure 7;

Figure 9 is an enlarged external view showing the slider of the first embodiment;

Figure 10 is an enlarged external view showing the elastic push button lock of the first embodiment; Figure 11 is an enlarged external view showing the left push button of the first embodiment;

Figure 12 is an enlarged external view showing the right push button of the first embodiment;

Figure 13 is an external view showing a push plate of the first embodiment;

Figure 14 is an external view showing a magazine holder in which a staple cartridge is mounted;

Figure 15 is an external view showing the anvil assembly removed from the outer casing and a part of the attachment;

Figure 16 is an enlarged external view showing the left projection of the elastic push button lock inserted into the restraining groove in the middle of the left push button; Figure 17 is a view showing the right projection of the elastic push button lock inserted into the restraining groove in the middle of the right push button; Figure 18 is a perspective view showing the surgical linear cutting stapler of the second embodiment of the present invention when the cartridge assembly and the anvil assembly are in a clamped state, and when the L-shaped push button is deployed to the right side of the cartridge holder Appearance picture;

Figure 19 is a perspective view showing the surgical linear cutting stapler of Figure 18 when the cartridge assembly and the anvil assembly are in a clamped state, and the L-shaped push button is deployed to the left side of the cartridge holder;

Figure 20 is a perspective view showing the L-shaped push button of the surgical linear cutting stapler of Figure 18 in a completed firing position; Figure 21 is a view showing the cartridge assembly of the surgical linear cutting stapler of Figure 18 removed from the outer casing, the staple cartridge, and Appearance after part of the attachment;

Figure 22 is an external view showing the bottom surface of the cartridge assembly of Figure 21;

Figure 23 is a plan view showing the L-shaped push button, the slider, the elastic push button lock and the push plate of Figure 21;

Figure 24 is a cross-sectional view showing the L-shaped push button, the slider, the elastic push button lock and the push plate of Figure 23; Figure 25 is a view showing the L-shaped push button and the slider and the elastic push button lock on the right side. An enlarged appearance of the bottom surface;

Figure 26 is an enlarged external view showing the state in which the shaft of the elastic push button lock is inserted into the arcuate groove of the L-shaped push button developed on the right side; Figure 27 is an enlarged external view showing the slider of the second embodiment;

Figure 28 is an enlarged external view showing the elastic push button lock of the second embodiment;

Figure 29 is an enlarged external view showing the L-shaped push button of the second embodiment;

Figure 30 is an external view showing a push plate, a pusher slanting blade and a cutting blade of the second embodiment;

Figure 31 is an enlarged perspective view showing the pusher sill, the pusher block and the staple in Figure 30 (only a pair of pusher blocks and staples are shown near the pusher slant);

Figure 32 is an enlarged perspective view showing the bottom surface of the L-shaped push button and the slider and the elastic push button lock which are unfolded on the left side;

Fig. 33 is an enlarged external view showing the state in which the shaft of the elastic push button lock is inserted into the arcuate groove of the L-shaped push button which is unfolded on the left side. detailed description

The best implementation of the firing mechanism of the surgical linear cutting stapler of the present invention will be described below by way of example with reference to the accompanying drawings. example. The scope of the invention is pointed out in the claims. It will be appreciated that some or all of the drawings are illustrative of the preferred embodiments of the invention and are not intended to depict the true dimensions of the illustrated. The practical manner of achieving the above and other objects and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments.

As shown in Fig. 1, the direction 1 indicates the near direction, the direction 2 indicates the far direction, the direction 3 indicates the left direction, the direction 4 indicates the right direction, the direction 5 indicates the upper direction, and the direction 6 indicates the lower side. Direction 1 and direction 2 constitute a surgical linear cutting stapler 7 longitudinal, direction 3 and direction 4 groups into a surgical linear cutting stapler 7 transverse, direction 5 and direction 6 constitute a surgical linear cutting stapler 7 sagittal.

The shape and structure of the firing mechanism 8 of the surgical linear cutting stapler 7 of the first embodiment of the present invention will now be described with reference to Figs. 1 through 17, illustrating the action of the firing mechanism 8.

The surgical linear cutting stapler 7 is composed of a cartridge assembly 9, an anvil assembly 10 and a clamping hook 11. When the surgical linear cutting stapler 7 is in the clamped state with the staple cartridge assembly 9 and the anvil assembly 10, Figure 1 shows that the two push buttons 12 and 13 are respectively deployed to the left and right sides of the staple cartridge holder; The button 13 is unfolded to the right side of the magazine holder 14, and the left push button 12 is close to the side of the magazine holder 14. FIG. 3 shows the left push button 12 unfolding to the left side of the magazine holder 14, and the right push button 13 for closing the nail. The side of the bin 14 is. Fig. 4 shows the state in which the push buttons 12 and 13 are in the completion of the firing position.

As shown in Figs. 5 to 14, 30 and 31, the cartridge assembly 9 has a staple cartridge 15, a cartridge holder 14 to which the staple cartridge 15 is mounted, and a firing mechanism 8 mounted in the cartridge holder 14. A pusher block 16 and a staple 17 are mounted in the staple cartridge 15. A plurality of kiss nails 17 are staggered in two rows on both sides of the staple sipe 18.

As shown in Fig. 15, the anvil assembly 10 has an anvil 19 and a nail anvil 20. Staple forming grooves 21 corresponding to the positions of the staples 17 in the magazine 15 are arranged on the surface of the anvil 19. A plurality of staple forming grooves 21 are alternately arranged in two rows on both side surfaces of the nail anvil groove 22.

As shown in Figures 1 to 3, the clamping hook 11 is pivotally coupled to the cartridge holder 14. After the cartridge assembly 9 and the anvil assembly 10 are brought together, the clamping hook 11 pivots about the cartridge holder 14 such that the clamping hook 11 hooks the staple anvil frame 20 and clamps the cartridge assembly 9 with the anvil assembly 10. tight.

As shown in Figs. 5 to 14, the firing mechanism 8 is composed of a left push button 12, a right push button 13, a slider 23, a push plate 24, a pusher slant 25, and a cutter 26.

As shown in FIGS. 5 to 14, 16, and 17, the middle portions of the two push buttons 12 and 13 have pivot holes 27 and 28 and constraining grooves 29 and 30, respectively, and the front bottom has curved grooves 31 and 32, respectively. The distal end of the slider 23 has arcuate fins 33 which are unfolded to the left and right sides of the cartridge holder 14, and the arcuate grooves 31 and 32 of the push buttons 12 and 13 can be inserted into the arcuate fins 33 of the slider 23. The middle portion of the slider 23 has a resilient push button lock 34 that is constrained to move up and down within the slider 23. The elastic push button lock 34 has a chassis 35, a pivot 36, a spring 37, and left and right bumps 38 and 39. The two push buttons 12 and 13 are placed one above the other and placed over the pivot 36 of the resilient push button lock 34 in the middle of the slider 23 through the pivot holes 27 and 28. In this way, the two push buttons 12 and 13 can each reel The pivot 36 of the push button lock 34 rotates. The proximal end of the bottom of the cartridge holder 14 has a hole 40.

When the push buttons 12 and 13 are in the state to be fired, the chassis 35 of the elastic push button lock 34 in the slider 23 is springed into the proximal end hole 40 of the bottom of the magazine holder 14, and the slider 23 is restrained to the magazine frame 14. At the same time, at the same time, the left and right lugs 38 and 39 of the elastic push button lock 34 are disengaged from the restraining grooves 29 and 30 in the middle of the push buttons 12 and 13, so that the curved grooves 31 and 32 of the left and right push buttons 12 and 13 can be The pivoting wings 33 of the slider 23 are pivoted respectively, and the push button 1 on the left side of the magazine frame 14 can be unfolded to the left side of the magazine frame 14, or the push button 13 on the right side of the magazine frame 14 can be pushed. Expanding to the right side of the magazine frame 14, the two push buttons 12 and 13 on both sides of the magazine frame 14 can also be deployed to the left and right sides of the magazine frame 14, respectively.

The slider 24 has a resilient projection 41 on the proximal side, and the bottoms of the two push buttons 12 and 13 have recesses 42 and 43, respectively. When the respective push buttons 12 and 13 are brought closer to the side of the magazine holder 14, the elastic projections 41 of the slider 23 are ejected into the grooves 42 and 43 of the push buttons 12 and 13, and the push buttons 12 and 13 are restrained to the slider 23 on. When the push button 12 or 13 is rotated around the pivot 36 of the elastic push button lock 34 toward the outside of the magazine holder 14, the recess 42 or 43 of the push button 12 or 13 is moved out of the elastic projection 41 of the slider 23.

When the push button 12 or 13 is initially pushed, the force acting on the push button 12 or 13 overcomes the constraint of the proximal end opening 40 of the bottom of the cartridge holder 14 against the chassis 35 of the resilient push button lock 34 in the slider 23, such that The push button 12 or 13 pushes the slider 23 to move back and forth in the magazine holder 14, while the left and right projections 38 and 39 of the elastic push button lock 34 are moved up into the restriction grooves 29 and 30 in the middle of the left and right push buttons 12 and 13, respectively. The two push buttons 12 and 13 are prevented from rotating about the pivot 36 of the resilient push button lock 34 in the slider 23.

When the push button 12 or 13 is advanced to perform the firing operation, the push button 12 or 13 pushes the curved fin 33 of the slider 23 through the curved groove 31 or 32 so that the slider 23 moves forward within the magazine frame 14, the slider 23 The pushing plate 24 is further moved forward in the magazine frame 14, and the pushing plate 24 pushes the pushing bar 25 and the cutting blade 26 to move forward in the magazine frame 14, and the pushing bar 25 pushes the respective pushing blocks 16 in turn. The staples 17 are pushed out of the staple cartridge 15 (see Figures 30 and 31).

When the push button 12 or 13 is moved backward to perform the reset operation, since the left and right projections 38 and 39 of the elastic push button lock 34 in the slider 23 are inserted into the restriction grooves 29 and 30 in the middle of the push buttons 12 and 13, the push button 12 is caused. The arcuate grooves 31 and 32 of the and 13 are not pivotable along the arcuate fins 33 of the slider 23. At this time, the push button 12 or 13 drives the projection 38 or 39 of the elastic push button lock 34 in the slider 23 through the middle restraining groove 29 or 30, so that the slider 23 moves backward in the magazine frame 14, and the slider 23 The push plate 24 is moved backward in the magazine frame 14, and the push plate 24 pushes the pusher bar 25 and the cutter 26 to move backward in the magazine frame 14 until the chassis 35 of the elastic push button lock 34 is pushed into the magazine frame. Within the proximal bore 40 of the bottom of the 14 is constrained to the proximal end of the cartridge holder 14 to reset the firing mechanism 8.

The proximal end of the push plate 24 has a hook 44. The right push button 13 mounted on the upper portion of the slider 23 has an arcuate step 45. The hook 44 of the proximal end of the push plate 24 is inserted into the curved step 45 mounted on the right push button 13 at the upper portion of the slider 23, and the push buttons 12 and 13 which are vertically placed on the slider 23 are placed at the left and right. The slider 23 is pivoted. The shape and structure of the firing mechanism 51 of the surgical linear cutting stapler 50 of the second embodiment of the present invention will now be described with reference to Figs. 18 to 33, illustrating the action of the firing mechanism 51.

The surgical linear cutting stapler 50 is comprised of a cartridge assembly 52, an anvil assembly 53 and a clamping hook 54. 18 and 19 respectively show the state in which the L-shaped push button 55 is unfolded to the right side of the magazine holder 14 and the left side is unfolded when the magazine assembly 52 and the anvil assembly 53 are in the clamped state. Fig. 20 shows the state in which the L-shaped push button 55 is in the completion of the firing position.

As shown in Figures 21, 22, 30 and 31, the cartridge assembly 52 has a staple cartridge 15, a cartridge holder 14 for mounting the staple cartridge 15, and a firing mechanism 51 mounted within the cartridge holder 14. A pusher block 16 and a staple 17 are mounted in the staple cartridge 15. A plurality of staples 17 are staggered in two rows on either side of the staple cartridge sipe 18.

As shown in Fig. 15, the anvil assembly 53 has an anvil 19 and a nail anvil 20. Staple forming grooves 21 corresponding to the positions of the staples 17 in the magazine 15 are arranged on the surface of the anvil 19. A plurality of staple forming grooves 21 are alternately arranged in two rows on both side surfaces of the nail anvil groove 22.

As shown in Figures 18 and 19, the clamping hook 54 is pivotally coupled to the cartridge holder 14. After the cartridge assembly 52 and the anvil assembly 53 are brought together, the clamping hook 54 pivots about the cartridge holder 14 such that the clamping hook 54 hooks the staple anvil frame 20 and clamps the cartridge assembly 52 with the anvil assembly 53. tight.

As shown in Figs. 21 and 22, the firing mechanism 51 is composed of an L-shaped push button 55, a slider 56, a push plate 57, a pusher slant 25, and a cutter 26.

As shown in Figs. 21 to 33, the L-shaped push button 55 has an arcuate groove 58. The distal end of the slider 56 has curved wings 59 that are unfolded to the left and right sides of the magazine holder 14. The arcuate groove 58 of the L-shaped push button 55 is inserted in the arcuate fin 59 of the slider 56. When the curved groove 58 of the L-shaped push button 55 is pivoted along the curved wing 59 of the slider 56, the L-shaped push button 55 can be unfolded to the left side of the magazine holder 14 or to the magazine frame 14. Expand on the right side.

The proximal end of the slider 56 has a resilient push button lock 60 that is constrained to move up and down within the slider 56. The flexible push button lock 60 has a chassis 61, a shaft 62 and a spring 63. The bottom end of the bottom of the magazine holder 14 has a hole 40. When the L-shaped push button 55 is in the state to be fired, the chassis 61 of the elastic push button lock 60 in the slider 56 is springed into the proximal end hole 40 of the bottom of the magazine holder 14, and the slider 56 is restrained in the magazine frame 14. At the same time, the shaft 62 of the elastic push button lock 60 is disengaged from the arcuate groove 58 of the L-shaped push button 55 such that the arcuate groove 58 of the L-shaped push button 55 can pivot along the curved wing 56 of the slider 56. Rotate so that the L-shaped push button 55 can be deployed either to the left side of the magazine holder 14 or to the right side of the magazine holder 14.

The push plate 57 has a hook 64 at its proximal end and an arcuate step 65 on the L-shaped push button 55. The proximal end hook 64 of the push plate 57 is inserted into the arcuate step 65 on the L-shaped push button 55, and the L-shaped push button 55 is constrained to pivot on the slider 57.

When the L-shaped push button 55 is initially pushed, the force acting on the L-shaped push button 55 overcomes the constraint of the proximal end opening 40 of the bottom of the cartridge holder 14 against the chassis 61 of the resilient push button lock 60 in the slider 56, such that L-shaped push button 55 pushes slider 56 in the cartridge holder The inner side 14 is moved back and forth, and at the same time, the shaft 62 of the elastic push button lock 60 is moved up into the arcuate groove 58 of the L-shaped push button 55.

When the L-shaped push button 55 is advanced to perform the firing operation, the L-shaped push button 55 pushes the curved fin 59 of the slider 56 through the arcuate groove 58 so that the slider 56 moves forward in the magazine frame 14, and the slider 56 pushes again. The push plate 57 moves forward in the staple cartridge frame 14, and the push plate 57 pushes the pusher skewer 25 and the cutter 26 to move forward in the staple cartridge frame 14. The pusher hammer 25 then pushes each pusher block 16 to match. The staples 17 are pushed out of the staple cartridge 15 (see Figures 30 and 31).

When the L-shaped push button 55 is moved backward to perform the resetting operation, since the shaft 62 of the elastic push button lock 60 in the slider 56 is inserted into the arcuate groove 58 of the L-shaped push button 55, the arcuate groove of the L-shaped push button 55 is made. 58 may not pivot along the arcuate fin 59 of the slider 56. At this time, the L-shaped push button 55 drives the shaft 62 of the elastic push button lock 60 in the slider 56 through the arcuate groove 58 so that the slider 56 moves backward in the magazine frame 14, and the slider 56 pushes the push plate 57 at the nail again. The inside of the magazine 14 is moved backward, and the push plate 57 pushes the pusher ramp 25 and the cutter 26 to move rearwardly within the magazine frame 14 until the chassis 61 of the elastic push button lock 60 is springed into the proximal end of the bottom of the magazine holder 14. Within the bore 40, the slider 56 is constrained to the proximal end of the cartridge holder 14 to reset the firing mechanism 51.

The proximal end of the push plate 57 and the slider 56 have holes 66 and 67, respectively, and the two sides of the magazine frame 14 respectively have long grooves 68, and the pins 69 are inserted into the holes 66 and 67 of the push plate 57 and the slider 56 and the nails. Within the elongated slot 68 of the bin 14 is such that the slider 56 can push the push plate 57 back and forth within the cartridge holder 14 by the pin 69.

The distal end of the push plate 57 has a U-shaped fork 70. The pusher slant 25 has a U-shaped groove 71. The distal end of the push plate 57, the U-shaped fork 70, is inserted into the U-shaped groove 71 on the pusher sill 25 so that the push plate 57 can push the pusher slant 25 to move back and forth within the staple cartridge frame 14.

The push plate 57 has a long groove 72 in the middle. The center of the magazine holder 14 has a positioning pin 73. The positioning pin 73 in the middle of the cartridge holder 14 is inserted into the long groove 72 of the push plate 57. When the L-shaped push button 55 is in the position to be fired, the positioning pin 73 in the middle of the magazine frame 14 is stopped at the distal end of the long groove 72 of the push plate 57, and the restraining push plate 57 can only move forward in the magazine frame 14. When the L-shaped push button 55 is in the completed firing position, the positioning pin 73 in the middle of the magazine frame 14 is held at the proximal end of the long groove 72 of the push plate 57, and the restraint push plate 57 can only be moved rearward in the magazine frame 14.

In this way, since the push button pushes the fin of the slider through the arc groove to move the slider forward in the staple cartridge frame, the protruding position of the push button is closer to the force of the slider in the push button and the slider frame, and the end can be exhausted. It is possible to reduce the friction between the slider generated by the torque and the cartridge holder and the deformation of the slider, thereby achieving the effect of reducing the cutting and stapling resistance of the firing mechanism.

According to the above detailed description, the firing mechanism of the surgical linear cutting stapler of the present invention has the following technical effects as compared with the existing various surgical linear cutting staplers:

The push button fixation of the firing mechanism of some existing surgical linear cutting staplers is located on one side of the staple cartridge assembly. When the push button of the firing mechanism pushes the slider forward in the magazine frame, the slider pushes the push plate forward in the magazine frame, and the push plate pushes the pusher and the cutter to move forward in the magazine frame. Push the nail and then push each pusher block to staple the staples from the staple cartridge roll out. The pusher pushes the staples out of the staple cartridge, and presses the staple tips of the staples against the forming grooves of the anvil, so that the two staple legs of the staples are bent along the forming groove to achieve the purpose of the tissue anastomosis . In order to ensure the purpose of the surgery to accurately match the tissue to be anastomosis, the push button of the firing mechanism needs to continuously push about 80 staples from the staple cartridge without stopping, and the two staple legs of the staple are along The forming groove is curved and the force exerted by the surgeon on the push button is large. An unsatisfactory aspect of the firing mechanism of such a style of surgical linear cutting stapler is: when the cartridge assembly and the anvil assembly are clamped by the clamping hook to clamp the tissue to be anastomosis between the anvil and the staple cartridge, Due to the anatomical position of the tissue to be anastomosed, the position of the push button placed on one side may not be convenient for the surgeon to apply the force to the push button, thereby affecting the surgical purpose of achieving an accurate anastomosis of the tissue to be anastomosed. Other M-shaped push buttons of the firing mechanism of other surgical linear cutting staplers are pivotable about a slider mounted in the cartridge holder. When the M-shaped push button rotates around the pivot of the slider, the M-shaped push button can protrude from the left side of the magazine holder or protrude to the right side of the magazine holder, so that the surgeon can choose to apply the action on the M-shaped push. The position of the force on the button. There are also some push buttons of the firing mechanism of the surgical linear cutting stapler that can pivot about the slider mounted in the cartridge holder. When the push button is pivoted about the slider, the push button can either protrude to the left side of the magazine holder or protrude to the right side of the magazine holder, so that the surgeon can select the position of the push button to apply the force. The unsatisfactory part of the firing mechanism of the above three types of surgical linear cutting staplers is: Since the pushing operation is performed when the push button is advanced, the pushing position of the push button is away from the push button and the slider in the staple cartridge frame. The force is farther away. Therefore, the force exerted by the push button on the slider forms a thrust and useless torque that is useful for cutting the anastomosis. The torque increases the friction between the slider and the cartridge holder and the deformation of the slider, thereby increasing The resistance of the firing mechanism of the firing mechanism of the firing mechanism. Therefore, the firing mechanism of the surgical linear cutting stapler needs to be improved.

The push button of the firing mechanism of the surgical linear cutting stapler of the present invention may be a single L-shaped push button or two push buttons arranged on the left and right sides of the staple cartridge frame. The push button has an arcuate groove, and the distal end of the slider has an arc-shaped fin that is unfolded to the left and right sides of the staple cartridge frame, and the curved groove of the push button is inserted on the curved wing of the slider. When the push button is in the state to be fired, the chassis of the elastic push button lock in the slider is inserted into the proximal hole of the bottom of the nail cartridge frame, and the slider is restrained at the proximal end of the staple cartridge frame, and at the same time, the elastic push button lock Disengaged from the push button, so that the curved groove of the push button can be pivoted along the curved wing of the slider, so that the push button can be unfolded to the left side of the magazine frame or to the right side of the magazine frame; When the push button is pushed, the force acting on the push button overcomes the constraint of the proximal hole of the bottom of the staple cartridge frame to the chassis of the elastic push button lock in the slider, so that the push button can push the slider back and forth in the staple cartridge frame Move, at the same time, the elastic push button locks up and inserts into the push button; when the push button moves forward to perform the firing operation, the push button pushes the curved wing of the slider through the curved groove to make the slider move forward in the staple frame, slippery The block pushes the push plate, the pusher slanting rakes and the cutting knives to move forward in the staple cartridge frame, pushes the slanting slanting shovel and then pushes each pusher block to push the staples out of the staple cartridge; when the push button moves backward to perform the reset operation , because the elastic push button lock inside the slider is inserted into the push button, so that the push button Can not slide along the arcuate slot curved wings pivoted, at this time, the push button driving the push button elastically lock the slider so that the slider moves rearward in the cartridge holder, pushing up the elastic The chassis of the button locks into the proximal hole of the bottom of the magazine holder, and the slider is restrained at the proximal end of the magazine holder to reset the firing mechanism. Compared with the existing surgical linear cutting stapler, when the surgeon uses the surgical linear cutting stapler of the present invention, the push button of the firing mechanism of the surgical linear cutting stapler of the present invention pushes the wing of the slider through the curved groove. The slider is moved forward in the magazine frame, so that the protruding position of the push button is closer to the force of the slider in the push button and the slider, so as to minimize the torque between the slider and the cartridge holder. The frictional force and the deformation of the slider achieve the effect of reducing the resistance of the firing mechanism when performing the operation of cutting the anastomosis.

Thus, it can be seen that the above stated objectives, including those shown by the foregoing description, are effectively achieved. The present invention is intended to be illustrative of the preferred embodiments of the present invention. The present invention is not limited to or limited to the specific details set forth herein, and any modifications or variations that are obvious to those skilled in the art will be apparent as set forth in the claims.

Claims

Claim

What is claimed is: 1. A firing mechanism for a surgical linear cutting stapler, the surgical linear cutting stapler comprising a staple cartridge assembly, an anvil assembly, and a clamping hook;

The staple cartridge assembly has a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism mounted in the staple cartridge holder. The staple cartridge is linear, and a pusher block and a staple are installed in the staple cartridge. a plurality of the staples are staggered in two or more rows in the staple cartridge;

The anvil assembly has an anvil and a nail anvil, the anvil is linear, and an anvil forming groove corresponding to the position of the staple in the staple cartridge is arranged on the surface of the anvil, and the plurality of the staples are arranged Forming grooves are staggered in two rows or more on the surface of the anvil;

The clamping hook is pivotally connected with the staple cartridge frame; after the cartridge assembly and the anvil assembly are closed to each other, the clamping hook pivots around the staple cartridge frame, so that the clamping hook hooks the staple anvil frame, The staple cartridge assembly is clamped to the anvil assembly;

The triggering mechanism is composed of a push button, a slider, a push rod, a pusher and a cutter, the front bottom of the push button has an arc groove, and the distal end of the slider has the nail An arcuate fin that is unfolded on the left and right sides of the magazine rack, the arcuate groove of the push button is inserted on the arcuate fin of the slider, so that the push button can be pivoted on the slider.

2. The firing mechanism of the surgical linear cutting stapler according to claim 1, wherein the push button is two push buttons arranged on the left and right sides of the magazine frame, the left and right sides The front bottom of the push button has an arcuate groove, and the distal end of the slider has arc-shaped fins that are unfolded to the left and right sides of the staple cartridge frame, and the arcuate grooves of the left and right push buttons are inserted in the slide The curved wings of the block allow the left and right push button pushers to pivot on the slider respectively.

3. The firing mechanism of the surgical linear cutting stapler according to claim 2, wherein the middle of the left and right push buttons respectively have a pivot hole and a restraining groove, and the middle portion of the slider is constrained to the slider a resilient push button lock that moves up and down, the elastic push button is locked with a chassis, a pivot, a spring, and left and right bumps, and the two push buttons are placed one above another and placed over the middle of the slider through the pivot hole The pivot of the elastic push button lock is such that the left and right push buttons can each pivot about the pivot of the elastic push button lock, and the proximal end of the bottom of the staple cartridge frame has a hole;

When the push button is in the state to be fired, the chassis of the elastic push button lock in the slider is slid into the proximal hole of the bottom of the magazine frame to restrain the slider at the proximal end of the magazine frame, and The left and right lugs of the elastic push button lock are disengaged from the restraining grooves in the middle of the push button, so that the arcuate grooves of the left and right push buttons can be pivoted along the curved wings of the slider respectively, and the staple cartridge frame can be The push button on the left side is unfolded to the left side of the staple cartridge holder. The push button on the right side of the staple cartridge holder can also be unfolded to the right side of the staple cartridge holder, and the two push buttons on both sides of the staple cartridge holder can be respectively nailed to the nail. The left and right sides of the warehouse rack are unfolded; When the push button is pushed, the force acting on the push button overcomes the constraint of the proximal hole of the bottom of the staple cartridge frame to the chassis of the elastic push button lock in the slider, so that the push button pushes the slider back and forth in the staple cartridge frame Moving, at the same time, the left and right lugs of the elastic push button lock are respectively inserted into the restraining grooves in the middle of the left and right push buttons, preventing the two push buttons from pivoting around the elastic push button locks in the slider; During the firing operation, the push button pushes the arcuate fin of the slider through the arcuate groove to move the slider forward in the magazine frame, and the slider pushes the push plate, the pusher and the cutter to move forward in the magazine frame. Pushing the slanting slant and pushing each pusher block to push the staples out of the staple cartridge;

When the push button is moved backward to perform the reset operation, since the left and right lugs of the elastic push button lock in the slider are inserted into the restraining groove in the middle of the push button, the curved groove of the push button cannot be pivoted along the curved wing of the slider. Turn. At this time, the push button drives the bump of the elastic push button lock in the slider through the middle restraint groove to move the slider backward in the staple cartridge frame until the chassis of the elastic push button lock is pushed into the proximal end of the bottom of the staple cartridge frame. Inside the hole, the slider is constrained to the proximal end of the cartridge holder to reset the firing mechanism.

4. The firing mechanism of the surgical linear cutting stapler according to claim 3, wherein the push plate has a hook at a proximal end thereof, and the push button mounted on an upper portion of the slider has a curved step. The hook of the proximal end of the push plate is inserted on the curved step of the push button mounted on the upper part of the slider, and the left and right push buttons are constrained to pivot on the slider.

5. The firing mechanism of the surgical linear cutting stapler according to claim 2, wherein the slider has elastic projections on a proximal side thereof, and the bottoms of the left and right push buttons respectively have a recess. When the push buttons are close to the side of the magazine holder, the elastic protrusions of the slider are slid into the grooves of the push button to restrain the push button on the slider; when each push button pivots When the outside of the staple cartridge is unfolded, the groove of the push button moves out of the elastic projection of the slider.

6. The firing mechanism of the surgical linear cutting stapler according to claim 1, wherein the firing mechanism is composed of a slider, a push plate, a pusher slanting blade, a cutting blade and a single L-shaped push button. The L-shaped push button has an arc-shaped groove, and the distal end of the slider has an arc-shaped fin which is unfolded to the left and right sides of the magazine frame, and the arc-shaped groove of the L-shaped push button is inserted into the arc of the slider On the wings; when the curved groove of the L-shaped push button pivots along the curved wing of the slider, the L-shaped push button can be unfolded to the left side of the magazine holder or to the right side of the magazine frame.

7. The firing mechanism of a surgical linear cutting stapler according to claim 6, wherein the proximal end of the slider has an elastic push button lock that is constrained to move up and down within the slider, the elastic push button lock There is a chassis, a shaft and a spring, and a bottom end of the bottom of the magazine holder has a hole;

When the L-shaped push button is in a state to be fired, the chassis of the elastic push button lock in the slider is slid into the proximal hole of the bottom of the magazine holder, and the slider is restrained in the vicinity of the staple holder At the same time, the shaft of the elastic push button lock is disengaged from the arcuate groove of the L-shaped push button, so that the arcuate groove of the L-shaped push button can pivot along the curved wing of the slider, so that L The push button can be unfolded to the left side of the magazine holder or to the right side of the magazine holder;

When the L-shaped push button is pushed, the force acting on the L-shaped push button overcomes the proximal end of the bottom of the cartridge holder against the slider The constraint of the chassis of the elastic push button lock enables the L-shaped push button to push the slider to move back and forth in the staple cartridge frame, and the shaft of the elastic push button lock is moved up into the arcuate groove of the L-shaped push button;

When the L-shaped push button is moved forward to perform the firing operation, the L-shaped push button pushes the arcuate fin of the slider through the curved groove to move the slider forward in the staple cartridge frame, and the slider pushes the push plate and pushes the skew The cymbal and the cutting knife move forward in the staple cartridge frame, and the pusher slanting slanting pushes each of the pusher blocks to push the staples out of the staple cartridge;

When the L-shaped push button is moved backward to perform the reset operation, since the axis of the elastic push button lock in the slider is inserted into the arcuate groove of the L-shaped push button, the arc groove of the L-shaped push button cannot be along the arc of the slider. The wing is pivoted. At this time, the L-shaped push button drives the shaft of the elastic push button lock in the slider through the arc groove to move the slider backward in the magazine frame until the chassis of the elastic push button locks into the staple cartridge Within the proximal bore of the bottom of the frame, the slider is constrained to the proximal end of the cartridge holder to reset the firing mechanism.

The firing mechanism of the surgical linear cutting stapler according to claim 6, wherein the push plate has a hook at a proximal end thereof, and the L-shaped push button has an arc-shaped step, and the push plate is near The hook of the end is inserted on the curved step on the L-shaped push button, and the L-shaped push button is constrained to pivot on the slider.

9. The firing mechanism of the surgical linear cutting stapler according to claim 1, wherein the proximal end of the push plate and the slider have holes, and the two sides of the staple cartridge frame have long grooves. A pin is inserted into the bore of the push plate and the slider and into the long slot of the cartridge holder such that the slider can push the push plate back and forth within the cartridge holder by the pin.

10. The firing mechanism of the surgical linear cutting stapler according to claim 1, wherein the push plate has a long groove in a middle portion thereof, and a positioning pin is arranged in a middle portion of the nail cartridge frame, and the middle portion of the nail cartridge frame The positioning pin is inserted into the long groove of the push plate; when the push button is in the position to be fired, the positioning pin in the middle of the nail holder is blocked at the distal end of the long groove of the push plate, and the restraining push plate can only be in the staple cartridge The inside of the frame moves forward; when the push button is in the completed firing position, the positioning pin in the middle of the nail holder is stopped at the proximal end of the long groove of the push plate, and the restraining push plate can only move backward in the staple frame.