A stapler for a stapler

Abstract

The present application relates to the technical field of medical apparatus, in particular to a stapler loading device. The stapler loading device comprises a cartridge seat capable of placing staples, and a pusher capable of pushing the staples in the cartridge seat into the cartridge of the stapler. The pusher comprises a plurality of pusher pieces corresponding to the cartridge slots in the cartridge seat. The pusher is capable of moving along the axial direction to drive the pusher pieces to push the staples contained in the cartridge slots out of the cartridge of the stapler. During the operation, only a plurality of cartridge seats are needed, and different heights of staples are pre-installed in each cartridge seat. According to the different tissue wounds, different cartridge seats with different heights of staples are selected, and the staples are pushed out by the pusher along the axial direction to complete the loading of the stapler. The stapler loading device reduces the operation cost and improves the effect of tissue wound suture.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a stapler for anastomosis devices. Background Technology

[0002] Anastomosing devices are medical devices used to replace manual suturing. Their main working principle is to use the cutting blade inside the instrument to cut and separate the tissue, and at the same time use suture staples to anastomose the tissue. Anastomosing devices are simple and convenient to use, save surgical time, avoid cross-infection, and use suture staples or stainless steel staples to suture the tissue tightly and with moderate tightness. They have few side effects and effectively reduce surgical complications.

[0003] The existing model of stapler is assembled with a specified staple height at the factory. During a surgery, the doctor usually performs multiple anastomosis operations according to the actual situation. If only a stapler with one staple height is used, it will affect the surgical outcome. If multiple staplers of the same model but different staple heights are used during the surgery, it will increase the surgical cost. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a stapler for anastomosis devices, which reduces surgical costs while improving the effect of tissue wound suturing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides a stapler for a stapler, including a staple cartridge seat for holding staples and a staple pusher for pushing the staples from the staple cartridge seat into the staple cartridge of the stapler. The staple cartridge seat includes an annular protrusion extending axially toward the staple pusher and a connector that can be detachably docked with the stapler for staple loading. The annular protrusion has a plurality of staple slots spaced circumferentially and extending axially, with open ends, for accommodating staples. The staple pusher includes a plurality of pusher blades corresponding one-to-one with the staple slots. The staple pusher is axially movable toward the staple cartridge seat to push the staples contained in the staple slots into the staple cartridge of the docked stapler.

[0009] Preferably, the pusher also includes a circular pusher plate and a drive assembly; the pusher plate extends axially in the circumferential direction of the pusher plate; the drive assembly is located on the side of the pusher plate away from the staple cartridge seat, and the drive assembly can be actuated to drive the pusher plate to move axially and push out the suture staples contained in the staple cartridge slot axially.

[0010] Preferably, the drive assembly includes at least one drive rod; the drive rod extends axially and is coaxially arranged with the pusher plate.

[0011] Preferably, the drive assembly includes at least a plurality of drive rods; the drive rods extend axially and are spaced apart circumferentially on the pusher plate.

[0012] Preferably, it further includes a housing, which is a cylindrical shape with one end open, and the nail cartridge seat and the nail pusher are coaxially housed in the housing; the inner wall of the housing has a first locking member; a second locking member is provided at the end of the drive rod away from the nail pusher plate. The first locking member can cooperate with the second locking member to releasably retain the nail pusher in the housing.

[0013] Preferably, the second locking member is a protrusion extending radially toward the first locking member, and the first locking member is a connecting rod extending radially; the second locking member has a sliding slope that allows relative sliding with the first locking member.

[0014] Preferably, the drive assembly further includes a power spring, one end of which abuts against the housing and the other end of which abuts against the pusher plate; when the first locking member and the second locking member are in the locked state, the power spring is in the compressed state; when the first locking member and the second locking member are in the unlocked state, the power spring is in the reset firing state, at which time the power spring pushes the pusher to move axially.

[0015] Preferably, it also includes a button, which is disposed at one end of the housing and is connected to the push pin to unlock the first locking member and the second locking member; the button includes a power rod, which passes through the top of the housing and is correspondingly disposed with the second locking member of the drive rod; the power rod can vertically push the second locking member to put the second locking member in the unlocked state.

[0016] Preferably, the button includes at least two third latches, which engage with a first slot at the top of the housing; and / or

[0017] It also includes a button spring; one end of the button spring abuts against the button, and the other end of the button spring abuts against the housing.

[0018] Preferably, the power rod is a vertical rod, and the power rod and the drive rod each have a mating inclined surface that allows for relative sliding motion.

[0019] Preferably, the device further includes multiple sets of button assemblies, which are disposed on the circumference of the housing and are respectively connected to the push pin through the housing to unlock the first locking member and the second locking member; the button assembly includes a pressing post, which passes through the side wall of the housing and is correspondingly disposed with the second locking member of the drive rod; the pressing post can horizontally push the second locking member to put the second locking member in the unlocked state.

[0020] Preferably, it also includes a compression spring; one end of the compression spring abuts against the pusher pin and the other end of the compression spring abuts against the pin cartridge seat.

[0021] Preferably, at least one guide bar is provided axially on the outer peripheral wall of the connector.

[0022] Preferably, a plurality of fourth buckles are provided at equal intervals on the outer wall of the annular protrusion, and the plurality of fourth buckles are respectively engaged with a plurality of second slots on the outer peripheral wall of the housing.

[0023] Preferably, the annular protrusion includes a plurality of protrusions that extend axially and are arranged at equal intervals around the axis of the staple cartridge seat. The staple cartridge groove includes a first staple cartridge groove and a second staple cartridge groove. The first staple cartridge groove is formed on the inner side of the protrusion. The outer walls of the protrusion include inwardly recessed grooves on both sides, and the groove between two adjacent protrusions forms the second staple cartridge groove.

[0024] (III) Beneficial Effects

[0025] The beneficial effects of this invention are:

[0026] This invention provides a stapler for a stapler, comprising a staple cartridge holder for holding staples and a staple pusher for pushing the staples from the staple cartridge holder into the staple cartridge of the stapler. The staple pusher includes multiple pusher plates corresponding one-to-one with the staple slots in the staple cartridge holder. The staple pusher is axially movable towards the staple cartridge holder, thereby driving the pusher plates to push the staples contained in the staple slots into the staple cartridge of the stapler. During surgery, only multiple staple cartridge holders are needed, each pre-installed with staples of different heights. Different staple cartridge holders with different heights are selected according to the different tissue wounds. The staples are pushed out by the axial movement of the staple pusher, thus completing the staple loading. This stapler reduces surgical costs while improving the effectiveness of tissue wound closure. Attached Figure Description

[0027] Figure 1 This is an exploded view of the stapler used in the stapler in Embodiment 1.

[0028] Figure 2 This is an exploded view of the stapler used in the stapler in Embodiment 1 from a second perspective;

[0029] Figure 3 This is an exploded view of the stapler used in the stapler in Embodiment 1 from a third-view perspective;

[0030] Figure 4 This is a schematic diagram of the stapler used in the stapler in Example 1 (the staple pusher is in the staple pushing state);

[0031] Figure 5 This is a front view of the stapler used for the stapler in Embodiment 1;

[0032] Figure 6 for Figure 5 Schematic diagram of the cross section of AA;

[0033] Figure 7 for Figure 1 Schematic diagram of the structure of the central nail slot base;

[0034] Figure 8 This is an exploded view of the stapler used in the stapler in Example 2;

[0035] Figure 9 This is a schematic diagram of the stapler used in the second embodiment;

[0036] Figure 10 for Figure 9 Cross-sectional view of BB.

[0037] [Explanation of Labels in the Attached Image]

[0038] 1: Housing; 11: First locking element; 12: First slot; 13: Second slot; 14: Through hole; 15: First positioning part; 16: Sealing post; 17: Positioning hole;

[0039] 2: Nail pusher; 21: Nail pusher piece; 22: Nail pusher plate; 23: Drive rod; 231: Second locking element; 24: Power spring; 25: Second positioning part;

[0040] 3: Staple cartridge seat; 31: Annular protrusion; 311: Protrusion; 3111: First staple cartridge groove; 3112: Groove; 312: Fourth buckle; 32: Connector;

[0041] 4: Button; 41: Power lever; 42: Third buckle; 43: First positioning groove;

[0042] 5: Button spring;

[0043] 6: Compression spring;

[0044] 7: Button assembly; 71: Mounting base; 72: Button seat; 73: Button spring; 74: Pressing post. Detailed Implementation

[0045] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0046] In this invention, the stapler refers to a circular stapler, which includes a cylindrical housing, a knob, an actuator rod, an anvil, and a staple cartridge. Of course, it also includes other common existing structures of circular staplers. The stapler of this invention is connected to the positioning hole of the staple cartridge of the circular stapler.

[0047] Example 1

[0048] like Figure 1-5 As shown, this embodiment provides a stapler for a stapler. The stapler includes a housing 1, a staple cartridge 3 capable of holding staples of different lengths, a staple pusher 2 capable of pushing the staples in the staple cartridge 3 into the staple cartridge of the stapler, and a button 4. The staple cartridge 3 and the staple pusher 2 are coaxially housed in the housing 1. The button 4 is located at one end of the housing 1 and is connected to the staple pusher 2 in a transmission manner.

[0049] The staple cartridge holder 3 includes an annular protrusion 31 extending axially toward the staple pusher 2, and a connector 32 that can be detachably connected to the stapler during the staple loading operation. The connector 32 on the staple cartridge holder 3 mates with the existing positioning holes in the stapler. The annular protrusion 31 has multiple staple slots arranged circumferentially and extending axially, with open ends, for accommodating staples. The staples are pre-loaded into the staple slots manually or by machine, and the staples in the slots are in their initial state.

[0050] like Figure 7 As shown, the annular protrusion 31 on the staple cartridge seat 3 includes multiple protrusions 311. These protrusions 311 extend axially and are arranged at equal intervals around the axis of the staple cartridge seat 3 to form the annular protrusion 31. The inner side of each protrusion 311, radially close to the axis of the staple cartridge seat 3, is hollow, and a first staple cartridge groove 3111 is formed by this hollow structure inside the protrusion 311. Grooves 3112 are recessed inwardly on the outer radial side of each protrusion 311. The grooves 3112 between adjacent protrusions 311 abut to form a second staple cartridge groove parallel to the first staple cartridge groove 3111. The first staple cartridge grooves 3111 on the multiple protrusions 311 form a first annular staple cartridge portion, and the second staple cartridge grooves on the multiple protrusions 311 form a second annular staple cartridge portion.

[0051] In practical applications, the second annular staple cartridge is fitted outside the first annular staple cartridge. The arrangement of the first and second annular staple cartridges matches the staple cartridges in the stapler. It should be noted that the same type of staples of different heights can be placed in the staple cartridge slot of the same staple cartridge seat 3. Alternatively, different types of staple cartridge seats 3, i.e., staple cartridge slots of different sizes, can be matched to the staple pusher 2 according to the actual situation. When the staples are placed in the staple cartridge slot, they are in an interference fit. However, to further ensure that the staples do not fall out during transportation, a baffle plate can be placed at the end of the annular protrusion 31 to prevent the staples from falling out of the staple cartridge slot.

[0052] A connector 32, located at the center of the staple cartridge seat 3 and extending in the opposite direction to the protrusion 311, is used to mate with the positioning hole on the staple cartridge of the stapler to allow the staples to be loaded from the staple cartridge groove into the staple cartridge of the stapler. In order to achieve quick and accurate docking between the stapler and the stapler, at least one guide strip that matches the positioning hole groove of the stapler can be provided axially on the outside of the connector 32, so as to facilitate positioning and installation with the positioning hole on the stapler. In actual application, one guide strip or multiple guide strips can be provided on the outside of the connector 32. The guide strip can be a long rectangular structure. In order to further facilitate the docking of the guide strip with the positioning hole groove, the end of the guide strip away from the button is set to a pointed shape.

[0053] like Figure 1 As shown, the staple pusher 2 includes multiple staple pusher pieces 21 corresponding one-to-one with the staple cartridge slots, a circular staple pusher plate 22, and a drive assembly. In this embodiment, the drive assembly includes at least a drive rod 23 (described in detail below). The staple pusher pieces 21 are arranged in two annular layers, corresponding to the first annular staple cartridge portion and the second annular staple cartridge portion, respectively. The length of the staple pusher piece 21 is longer than the height of the staple cartridge slot to ensure that the staples in the staple cartridge slot can be completely pushed out into the staple cartridge of the stapler during the staple loading operation. The staple pusher pieces 21 are circumferentially extended on the staple pusher plate 22. The drive assembly is located on the side of the staple pusher plate 22 away from the staple cartridge seat 3, and the drive assembly can be actuated to drive the inner and outer layers of staple pusher pieces 21 to move axially, pushing the staples placed in the first annular staple cartridge portion and the second annular staple cartridge portion axially into the staple cartridge of the stapler, thereby completing the staple loading during the operation. During the operation, only multiple staple cartridges 3 are needed, and each staple cartridge 3 is pre-installed with sutures of different heights. The staple cartridge 3 of different heights is selected according to the different tissue wounds. The sutures are pushed out by the suture pusher 2 moving along the axis, and the staple loading is completed. This staple loading device reduces the surgical cost while improving the effect of tissue wound suturing.

[0054] To ensure the working strength of the stapler used in the stapler, a reinforcing rib is provided in the circumferential direction of the staple pusher plate 22. The reinforcing rib and the connecting gap formed between the two adjacent protrusions 311 form a closed structure, thereby increasing the strength between the staple pusher 3 and the staple cartridge seat 5.

[0055] In this embodiment, the purpose of the housing 1 is to facilitate the positioning and installation of the pusher 2 and the staple cartridge seat 3. The housing 1 is a cylindrical shape with one open end, and the staple cartridge seat 3 and the pusher 2 are coaxially housed within the housing 1. To facilitate the installation of the staple cartridge seat 3, multiple second slots 13 are provided on the side wall of the housing 1. Correspondingly, multiple fourth buckles 312 are provided on the outer wall of the annular protrusion 31 corresponding to the second slots 13. When the staple cartridge seat 3 is installed with the housing 1, the fourth buckles 312 can engage with the second slots 13 respectively. In order to facilitate the demolding of the annular protrusion 31, the second staple cartridge groove is formed between adjacent protrusions. The radially outer side of the second staple cartridge groove is open. On the inner wall of the housing 1, a sealing post 16 is provided on the outer side of each second staple cartridge groove. When the staple cartridge seat 3 is installed inside the housing 1, the sealing post 16 can fit against the outer side of the second staple cartridge groove (reference numeral), thereby forming a closed second staple cartridge groove.

[0056] To prevent accidental firing of the pusher 2, the stapler for the stapler also includes a locking structure. This locking structure includes a first locking member 11 disposed on the inner wall of the housing 1 and a second locking member 231 disposed at the end of the drive rod 23 away from the pusher plate 22. The first locking member 11 and the second locking member 231 cooperate to releasably retain the pusher 2 within the housing 1. In this embodiment, the first locking member 11 is a radially extending connecting rod, and the second locking member 231 is a radially extending protrusion toward the first locking member 11. To facilitate smoother unlocking, the second locking member 231 has a sliding ramp that allows relative sliding movement with the first locking member 11.

[0057] like Figure 6 As shown, in this embodiment, the driving assembly includes at least two driving rods 23. The driving rods 23 extend axially and are spaced apart circumferentially on the pusher plate 21, thereby ensuring that the force on the pusher plate 22 is uniform and ensuring the reliability of the movement of the pusher 2.

[0058] To enable automatic firing after the pusher pin 2 is unlocked, the drive assembly may also include a power spring 24. One end of the power spring 24 abuts against the unopened end of the housing 1, and the other end of the power spring 24 abuts against the pusher pin plate 22. To facilitate the positioning and installation of the power spring 24, a first positioning part 15 is provided on the top of the housing 1, which protrudes toward the pin cartridge seat 3. A second positioning part 25 is provided on the pusher pin plate 22, which protrudes toward the unopened end of the housing 1. The second positioning part 25 and the first positioning part 15 are correspondingly arranged. One end of the power spring 24 is sleeved on the first positioning part 15, and the other end of the power spring 24 abuts against the second positioning part 25 of the pusher pin plate 22.

[0059] When the first locking member 11 and the second locking member 231 are locked, the power spring 24 is compressed. When the first locking member 11 and the second locking member 231 are unlocked and in the unlocked state, the power spring 24 is in the reset firing state. At this time, the power spring 24 pushes the pusher 2 to move axially, thereby driving the pusher 21 into the staple slot to push out the suture staple.

[0060] Because the restoring force of the power spring 24 is relatively large at the moment of release, in order to increase the buffering of the power spring 24 at the moment of release, such as Figure 1 As shown, the nailer may also include a compression spring 6, one end of which abuts against the nail pusher 2 and the other end of which abuts against the nail cartridge seat 3. In order to facilitate the positioning and installation of the compression spring 6, a receiving groove is recessed on the inner side of the second positioning part 25, and one end of the compression spring 6 abuts against the receiving groove on the nail pusher plate 22. It should be understood that the elastic force of the power spring 24 is greater than the elastic force of the compression spring 6.

[0061] The purpose of button 4 in this document is to facilitate the unlocking of the first locking member 11 and the second locking member 231. Button 4 is located at one end of housing 1 and is connected to push pin 2 to unlock the first locking member 11 and the second locking member 231. Button 4 includes a power rod 41, which passes through a through hole 14 at the top of housing 1 and is correspondingly positioned with the second locking member 231 of drive rod 23. When button 4 is pressed, power rod 41 pushes the second locking member 231 to disengage from the first locking member 11. At this time, the first locking member 11 and the second locking member 231 are in the unlocked state. Subsequently, the power spring 24 resets and pushes push pin 2 to move axially. In this embodiment, the power rod 41 is a vertical rod, and the power rod 41 and the drive rod 23 each have a mating inclined surface that can undergo relative sliding motion. The drive rod 23 is made of elastic material. When the mating inclined surface of the vertical rod aligns with the mating inclined surface on the drive rod 23, and the drive rod 23 is pressed down further, both drive rods 23 simultaneously shift towards the axis of the housing 1. At this time, the first locking member 11 and the second locking member 231 are unlocked.

[0062] Of course, button 4 includes at least two third latches 42, which are arranged at equal intervals around the axis of button 4 to ensure that the force on button 4 is uniform. Multiple first slots 12 are provided at the top of housing 1, and multiple third latches 42 are respectively engaged with the first slots 12 at the top of housing 1 to install button 4 on housing 1.

[0063] To facilitate the reset of button 4 and enhance the pressing feel, this embodiment also includes a button spring 5. One end of the button spring 5 abuts against button 4, and the other end of the button spring 5 abuts against housing 1. In actual application, a first positioning groove 43 is recessed on the inner side of the top of button 4, and a second positioning groove is opened inside the first positioning part 15 on housing 1. The first positioning groove 43 and the second positioning groove are correspondingly arranged to facilitate the installation and positioning of button spring 5.

[0064] Example 2

[0065] like Figure 8-10 As shown, the difference between this embodiment and embodiment one is that the unlocking method of the first locking member 11 and the second locking member 231 is different. Specifically, the structure of the button 4 and the button spring 5 in embodiment one is replaced by button assemblies 7 set on both sides of the housing 1. The two sets of button assemblies 7 pass through the positioning holes 17 on both sides of the housing 1 and are set opposite to the second locking member 231 on the drive rod 23. When the button assemblies 7 on both sides are pressed at the same time, the button assemblies 7 push the drive rod 23 to move radially in the direction of the axis to unlock the first locking member 11 and the second locking member 231.

[0066] like Figure 10 As shown, the button assembly 7 includes a button base 72, a mounting base 71, and a pressing post 74 disposed within the button base 72. The button base 72 is fixedly connected to the pressing post 74 via a pin. The button base 72 is sleeved within the mounting base 71 and slidably connected to it. The mounting base 71 is fixed to the housing 1 by a snap-fit ​​connection. The pressing post 74 has an L-shaped structure formed by a vertical post and a horizontal post. The vertical post passes through the mounting base 71 and connects to the button base 72. The horizontal post rests within the cavity of the housing 1 and engages with the second connecting member 231 of the drive rod 23. When the button base 72 is pressed, the horizontal post of the pressing post 74 pushes the second connecting member 231 radially towards the axis, thereby unlocking the first locking member 11 and the second locking member 231. Simultaneously, to facilitate the reset of the pressing post 74, a button spring 73 is sleeved on the vertical post of the pressing post 74.

[0067] Meanwhile, in this embodiment, in order to facilitate the installation of the power spring 24, the second positioning part 25 is constructed as a convex structure, one end of the power spring 24 is sleeved on the second positioning part 25, and the other end of the power spring 24 abuts against the unopened end of the housing 1.

[0068] Example 3

[0069] The difference between this embodiment and Embodiment 1 lies in the firing method of the pusher 2. Specifically, the driving assembly includes only one driving rod 23, which is located at the center of the pusher plate 22. In this embodiment, the axial movement of the pusher 2 can be achieved by manually pushing the driving rod 23 downward.

[0070] It should be noted that the pusher 2, pusher plate 21, pusher plate 22, drive rod 23, nail cartridge seat 3, first nail cartridge groove 3111, groove 3112, power rod 41, etc. mentioned in this article are all internal structures of the nail loader.

[0071] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A stapler for anastomosis devices, characterized in that, It includes a staple cartridge (3) capable of holding staples, and a staple pusher (2) capable of pushing the staples in the staple cartridge (3) into the staple cartridge of the stapler. The staple cartridge seat (3) includes: an annular protrusion (31) extending axially toward the staple pusher (2), and a connector (32) capable of detachably docking with the stapler for staple loading operation. The annular protrusion (31) is provided with a plurality of staple cartridge slots arranged circumferentially and extending axially with open ends. The staple cartridge slots are used to accommodate suture staples. The pusher (2) includes a plurality of pusher plates (21) corresponding one-to-one with the staple cartridge slot. The pusher (2) can move axially toward the staple cartridge seat (3) to drive the pusher plates (21) to push the suture staples contained in the staple cartridge slot into the staple cartridge of the mating stapler. The pusher (2) also includes a pusher plate (22) with a circular structure and a drive assembly; The pusher piece (21) is axially extended and disposed in the circumferential direction of the pusher plate (22); The drive assembly is located on the side of the pusher plate (22) away from the staple cartridge seat (3), and the drive assembly can be actuated to drive the pusher plate (21) to move axially and push out the suture staples contained in the staple cartridge slot.

2. The stapler for an anastomosis device as described in claim 1, characterized in that, The drive assembly includes at least one drive rod (23); The drive rod (23) extends axially and is coaxially arranged with the pusher plate (22).

3. The stapler for an anastomosis device as described in claim 1, characterized in that, The drive assembly includes at least a plurality of drive rods (23); The drive rod (23) extends axially and is spaced circumferentially from the pusher plate (21).

4. The stapler for an anastomosis device as described in claim 3, characterized in that, It also includes a housing (1), which is a cylindrical shape with one end open, and the nail cartridge seat (3) and the nail pusher (2) are coaxially housed in the housing (1); The inner wall of the housing (1) has a first locking element (11); A second locking element (231) is provided at the end of the drive rod (23) away from the pusher plate (22); The first locking member (11) can cooperate with the second locking member (231) to releasably retain the pusher (2) within the housing (1).

5. The stapler for an anastomosis device as described in claim 4, characterized in that, The second locking member (231) is a protrusion extending radially toward the first locking member (11), and the first locking member (11) is a connecting rod extending radially; The second locking member (231) has a sliding ramp that can slide relative to the first locking member (11).

6. The stapler for an anastomosis device as described in claim 4, characterized in that, The drive assembly also includes a power spring (24), one end of which abuts against the housing (1) and the other end of which abuts against the pusher plate (22); When the first locking member (11) and the second locking member (231) are locked, the power spring (24) is compressed. When the first locking member (11) and the second locking member (231) are unlocked, the power spring (24) is reset and fired. At this time, the power spring (24) pushes the pusher (2) to move axially.

7. The stapler for an anastomosis device as described in claim 4, characterized in that, It also includes a button (4), which is disposed at one end of the housing (1) and is connected to the push pin (2) for unlocking the first locking member (11) and the second locking member (231); The button (4) includes a power rod (41), which passes through the top of the housing (1) and is correspondingly set with the second locking member (231) of the drive rod (23); The power rod (41) can vertically push the second locking member (231) to put the second locking member (231) in the unlocked state.

8. The stapler for an anastomosis device as described in claim 7, characterized in that, The button (4) includes at least two third latches (42), which engage with a first slot (12) at the top of the housing (1); and / or It also includes a button spring (5); One end of the button spring (5) abuts against the button (4), and the other end of the button spring (5) abuts against the housing (1).

9. The stapler for a stapler as described in claim 7, characterized in that, The power rod (41) is a vertical rod, and the power rod (41) and the drive rod (23) each have a docking inclined surface that can undergo relative sliding motion.

10. The stapler for an anastomosis device as described in claim 4, characterized in that, It also includes multiple sets of button assemblies (7), which are disposed on the circumference of the housing (1) and pass through the housing (1) to be connected to the push pin (2) to unlock the first locking member (11) and the second locking member (231); The button assembly (7) includes a pressing post (74) that passes through the side wall of the housing (1) and is correspondingly disposed to the second locking member (231) of the drive rod (23); The pressing column (74) can horizontally push the second locking member (231) to put the second locking member (231) in the unlocked state.

11. The stapler for an anastomosis device as described in any one of claims 6-10, characterized in that, It also includes a compression spring (6); One end of the compression spring (6) abuts against the pusher (2), and the other end of the compression spring (6) abuts against the nail cartridge seat (3).

12. The stapler for an anastomosis device as claimed in claim 1, characterized in that, At least one guide bar is provided axially on the outer peripheral wall of the connector (32).

13. The stapler for an anastomosis device as described in claim 4, characterized in that, Multiple fourth buckles (312) are provided at equal intervals on the outer wall of the annular protrusion (31), and the multiple fourth buckles (312) are respectively engaged with multiple second slots (13) on the outer peripheral wall of the housing (1).

14. The stapler for an anastomosis device as claimed in claim 1, characterized in that, The annular protrusion (31) includes a plurality of protrusions (311), which extend axially and are arranged at equal intervals with the axis of the staple cartridge seat (3) as the center. The staple cartridge groove includes a first staple cartridge groove (3111) and a second staple cartridge groove (3112). The first staple cartridge groove (3111) is opened on the inner side of the protrusion (311). The outer wall of the protrusion (311) includes inwardly recessed grooves on both sides, and the grooves between two adjacent protrusions (311) form the second nail cartridge groove (3112).

Images