CN214907508U

CN214907508U - Surgical stapler

Info

Publication number: CN214907508U
Application number: CN202023275967.0U
Authority: CN
Inventors: 单腾; 曹元阳
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Touchstone International Medical Science Co Ltd; Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-30
Anticipated expiration: 2030-12-29

Abstract

The utility model provides a surgical anastomat, include: the side wall of the shell is provided with a window; the nail anvil is fixed inside the shell; the firing assembly is positioned on the proximal end side of the nail anvil, anastomotic nails are arranged inside the firing assembly, at least part of the firing assembly is detachably connected with the shell, and the firing assembly can move along the axial direction of the anastomat relative to the shell; when the anastomat is fired, the driving assembly pushes the firing assembly to move towards the direction of the far end side of the anastomat and pushes out the anastomosis nails in the firing assembly towards the nail anvil. The utility model discloses a drive assembly drive percussion subassembly accomplishes the closure and the percussion of anastomat, coincide the tissue, realize that the tissue is sewed up or the tissue opening is closed to the percussion subassembly can separate and change with the casing, realizes the reuse of apparatus.

Description

Surgical stapler

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to surgery anastomat.

Background

In surgical treatment, it is often necessary to suture some tissues in the human body or to close a tissue opening. For example, in a surgical operation, a portion of a diseased tissue is first sutured and then excised. As another example, fistulous tracts may be formed in the body for various reasons, which refer to pathological drainage tracts that are connected between the outside of the body and a luminal organ or between two luminal organs due to abscesses. Anastomotic fistulas are one of the common complications after alimentary canal anastomosis surgery. After the alimentary tract anastomosis operation, a fistula tract appears at an anastomosis port, which can cause great threat to the physical health of a patient. For another example, it is often necessary to remove diseased tissue from the body during surgery, and tissue openings that need to be closed may also occur after removal. Some instruments for suturing or treating tissue openings have been proposed, however, the prior instruments tend to be relatively complex in construction and the firing assembly is difficult to replace.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a surgical stapler accomplishes the closure and the percussion of stapler through drive assembly drive firing subassembly, coincide the tissue, realizes that the tissue is sewed up or the tissue opening is closed to the firing subassembly can separate and change with the casing, realizes the reuse of apparatus.

An embodiment of the utility model provides a surgical stapler, include:

the side wall of the shell is provided with a window;

the nail anvil is fixed inside the shell;

the firing assembly is positioned on the proximal end side of the nail anvil, anastomotic nails are arranged inside the firing assembly, at least part of the firing assembly is detachably connected with the shell, and the firing assembly can move along the axial direction of the anastomat relative to the shell;

when the anastomat is fired, the driving assembly pushes the firing assembly to move towards the direction of the far end side of the anastomat and pushes out the anastomosis nails in the firing assembly towards the nail anvil.

In some embodiments, the firing assembly comprises a staple cartridge assembly and a firing block, the staple cartridge assembly and the firing block are sequentially arranged along the axial direction of the anastomat from the far end side to the near end side, and the firing block is detachably connected with the shell.

In some embodiments, the firing block is detachably connected to the housing through a first connecting member, the first connecting member is fixedly disposed on the housing, the firing block is provided with a guide groove extending along an axial direction of the stapler, the first connecting member is partially located in the guide groove, and the first connecting member is movable along an extending direction of the guide groove.

In some embodiments, the first connecting piece comprises a first matching part, a connecting part and a second matching part which are arranged in sequence, and the width of the second matching part is greater than that of the guide groove;

the first matching portion is fixedly connected with the shell, and the connecting portion penetrates through the guide groove, so that the first matching portion and the second matching portion are respectively located on the inner side and the outer side of the firing block.

In some embodiments, a first connecting piece mounting part is arranged on the housing, the first connecting piece comprises a first matching part, a connecting part and a second matching part which are arranged in sequence, and the width of the second matching part is greater than that of the guide groove; the first matching portion is connected with the first connecting piece installation portion, and the connecting portion penetrates through the guide groove, so that the second matching portion is located on one side, away from the casing, of the firing block.

In some embodiments, the distal end side of the guide groove is provided with a guide groove hole having a width larger than that of the second engaging portion, and the second engaging portion is separable from the guide groove through the guide groove hole when the second engaging portion moves to the guide groove hole.

In some embodiments, the housing has a connector mounting groove, and the first fitting portion is fixedly embedded in the connector mounting groove.

In some embodiments, in an initial state, the firing assembly is located on a proximal side of the window, and when the driving assembly pushes the firing assembly to move toward a distal side of the stapler, the firing assembly gradually covers the window and pushes out staples in the firing assembly toward the anvil.

In some embodiments, the drive assembly includes a drive handle including a firing engagement portion, a pivot portion, and a gripping portion arranged in series, the pivot portion rotatably coupled to the housing, the firing engagement portion rotatably coupled to the firing assembly, the gripping portion configured to rotate in a first direction such that the firing engagement portion drives the firing assembly toward the anvil.

In some embodiments, the proximal side of the housing is provided with a fixed handle, the pivot being detachably connected to the fixed handle by a second connector;

the fixed handle is provided with a first through hole, the pivoting part is provided with a second through hole, the second connecting piece is arranged in the first through hole and the second through hole in a penetrating mode, and the second connecting piece can be separated from the first through hole and the second through hole; when the second connecting piece is separated from the first through hole and/or the second through hole, the whole firing assembly is separated from the shell.

In some embodiments, the fixing handle is provided with a mounting groove, the pivot part of the driving handle is located in the mounting groove, the stapler further comprises a safety pin, a side wall of the mounting groove is provided with a third through hole, the safety pin penetrates through the third through hole and at least partially enters the mounting groove, and the safety pin can be pulled out of the through hole;

when the safety pin is at least partially positioned in the mounting groove, the safety pin is positioned on a rotating path of the driving handle along the first direction.

In some embodiments, the firing assembly further comprises a drive member, wherein both ends of the drive member are rotatably connected to the proximal side of the firing assembly and the firing engagement portion of the drive handle, respectively.

In some embodiments, a first pivot shaft is disposed on a proximal side of the firing assembly, one end of the transmission member includes a hook portion, the hook portion is rotatably hung on the first pivot shaft, the hook portion can rotate relative to the first pivot shaft by a certain angle to be separated from the first pivot shaft, and after the hook portion is separated from the first pivot shaft, the cartridge assembly can be detached from the housing.

In some embodiments, a stop is disposed on a proximal side of the firing assembly, the stop is located on a distal side of the first pivot shaft, and a proximal side of the stop is disposed opposite a distal side of the hook;

the proximal side surface of the stopping part and the distal side surface of the hook part are respectively inclined guide surfaces.

In some embodiments, one end of the transmission member comprises a second connection hole, a third connection hole is arranged at the proximal end side of the firing block, the second connection hole and the third connection hole are rotatably connected through a connection pin, and the connection pin can be separated from the second connection hole and the third connection hole; after the connecting pin is separated from the second connecting hole and/or the third connecting hole, the nail cartridge assembly can be separated from the shell.

In some embodiments, the anvil and the firing assembly are disposed proximate to an inner sidewall of the housing, and the firing assembly and the pivot portion are disposed on opposite sides of a centerline of the housing.

In some embodiments, the driving assembly further includes a second elastic member, the second elastic member is located between the driving handle and the housing, when the driving handle is rotated in the first direction by an external force, the driving handle drives the firing assembly to move towards the distal end side of the stapler, the second elastic member is elastically deformed, and after the external force is removed, the driving handle is rotationally reset in the second direction under the elastic deformation restoring force of the second elastic member.

In some embodiments, the staple cartridge assembly comprises a staple cartridge having a first position and a second position, wherein in an initial state, the staple cartridge is in the first position, and when the stapler is fired, the driving assembly pushes the staple cartridge to move to the second position towards the distal side of the stapler through the firing block;

when the nail bin is located at the second position, the driving assembly pushes the firing block to move towards the direction of the far end side of the anastomat, and the firing block pushes out the anastomosis nails in the nail bin towards the nail anvil.

In some embodiments, the staple cartridge assembly comprises a staple cartridge and a first elastic member, the first elastic member is located inside the staple cartridge, a distal side of the first elastic member abuts against a distal side of the staple cartridge, and a proximal side of the elastic member abuts against a distal side of the firing block;

when the staple box is located at the first position, the firing block is at least partially located in the staple box, the first elastic piece is not compressed or has an initial compression amount, the staple box is located at the second position, and when the driving assembly continues to push the firing block to move towards the direction of the distal end side of the anastomat, the firing block compresses the first elastic piece so that the firing block continues to enter the interior of the staple box.

In some embodiments, the stapler further comprises a guide rail extending along the axial direction of the stapler, the anvil and the firing assembly are sleeved on the guide rail, and when the firing assembly is separated from the housing, the firing assembly can be separated from the guide rail from the proximal side of the guide rail.

In some embodiments, a light emitting component is also included, the light emitting component being located inside the housing.

The utility model provides a surgery anastomat has following advantage:

the utility model provides an identical apparatus to tissue, place the surgery anastomat in the pathological change position in the use, will need anastomotic tissue to draw in between nail anvil and the percussion subassembly through the window, accomplish the percussion of anastomat through operation drive assembly drive percussion subassembly, through the anastomotic nail in the percussion subassembly at nail anvil department shaping and coincide the tissue, realized that the tissue is sewed up or the tissue opening is closed, the structure is retrencied, easy operation, and the percussion subassembly with casing detachably connects, can conveniently change when not using, realizes the reuse of apparatus, for example in the patient that takes place anus rectum fistula, often fistula way and fistula more than one the time, only need to change the percussion subassembly can, can reduce patient's cost.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a front view of a surgical stapler in an initial state in accordance with an embodiment of the present invention;

FIGS. 2 and 3 are perspective views of a surgical stapler in an initial state in accordance with one embodiment of the present invention;

FIG. 4 is a schematic view of the handle engagement in an initial state according to an embodiment of the present invention;

FIG. 5 is a diagrammatic view of the anvil and firing assembly in an initial state in accordance with one embodiment of the present invention;

FIG. 6 is a schematic view of the engagement of the cartridge module and the firing block according to an embodiment of the present invention;

FIG. 7 is a schematic view of the anvil and firing assembly of one embodiment of the present invention in cooperation;

fig. 8 is a schematic structural view of a staple according to an embodiment of the present invention;

FIG. 9 is a sectional view taken in the direction A1-A1 of FIG. 5;

FIG. 10 is a front view of a surgical stapler upon firing in accordance with an embodiment of the present invention;

FIG. 11 is a perspective view of a surgical stapler upon firing in accordance with an embodiment of the present invention;

FIG. 12 is a diagrammatic view of the anvil and firing assembly engaged during firing of one embodiment of the present invention;

FIG. 13 is a diagrammatic view of the anvil and firing assembly in cooperation at the completion of firing according to one embodiment of the present invention;

FIG. 14 is a sectional view in the direction A2-A2 of FIG. 13;

FIG. 15 is a front view of the stapler with a reset after firing in accordance with one embodiment of the present invention;

FIG. 16 is a schematic view of the housing, drive assembly and firing assembly of one embodiment of the present invention in cooperation;

fig. 17 is a schematic view of the housing and drive assembly of an embodiment of the present invention;

FIGS. 18 and 19 are schematic views of a firing block and first coupling member of an embodiment of the present invention;

FIG. 20 is a bottom view of the firing block and first coupling member engagement structure in an initial state in accordance with an embodiment of the present invention;

FIG. 21 is a bottom view of the engagement structure of the trigger block and the first connecting element after the trigger is completed according to an embodiment of the present invention;

FIG. 22 is a schematic view of a surgical stapler having a safety pin according to an embodiment of the present invention;

FIG. 23 is a schematic view of an embodiment of a surgical stapler after a safety pin has been removed from the housing;

FIG. 24 is a schematic structural view of a surgical stapler according to another embodiment of the invention;

figures 25 and 26 are schematic views of a firing assembly and drive assembly engagement position of another embodiment of the present invention.

Reference numerals:

1 case 57 stop

11 distal side 58 third attachment aperture of housing

111 distal opening 59 drive member engagement portion

12 fixed handle 6 driving part

121 mounting groove 61 hook part

1211 third through hole 62 first connection hole

122 first through hole 63 second connecting hole

13 Window 7 drive assembly

15 proximal opening 71 drive handle

16 connecting piece mounting groove 56 guide groove

2 anvil 711 firing matching part

21 second pivot axis of anvil guide 7111

22 anvil face 712 pivot

3 second through hole of nail bin assembly 7121

31 nail magazine 713 holding part

311 bin guide part 7131 elastic piece stopping part

312 staple cartridge face 73 second resilient member

3121A first end of the second elastic member of the nail hole 731

32 first elastic member 732 and second end of second elastic member

33 through groove for anastomosis nail 733

331 fixed end 74 safety pin

332 spike end 741 projection

4 guide rail 742 stop

41 distal side 75 second connector of guide rail

Proximal end side 751 operating part of 42 guide rail

5 firing block 752 linkage

51 first connecting part of striking plate 8

52 firing guide 81 first mating feature

54 first pivot axle 82 connecting part

561 guide groove hole 83 second matching part

562 guide groove proximal 9 connecting pin

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The utility model provides a surgical anastomat, include: the side wall of the shell is provided with a window; the nail anvil is fixed inside the shell; the firing assembly is positioned on the proximal end side of the nail anvil, an anastomosis nail is arranged in the firing assembly, the firing assembly is detachably connected with the shell, and the firing assembly can move along the axial direction of the anastomat relative to the shell; and when the anastomat is fired, the driving assembly pushes the firing assembly to move towards the direction of the far end side of the anastomat and pushes out the anastomosis nails in the firing assembly towards the nail anvil.

The surgical stapler may be used for tissue anastomosis. The surgical stapler is firstly placed at a pathological change position, tissues to be anastomosed are pulled into the shell through a window on the side wall of the shell, so that the tissues are positioned between the nail anvil and the firing assembly, then the firing assembly is driven by the driving assembly to move towards the far end side of the stapler to clamp the tissues with the nail anvil, the stapler is closed, and the tissues are anastomosed by forming the anastomotic nails in the firing assembly at the nail anvil. The utility model discloses a closed in order to press from both sides tight tissue between nail anvil and the percussion subassembly both can be realized to one set of drive assembly, can realize again that the drive coincide nail releases the shaping, adopts one set of drive assembly to realize the anastomat closure and percussion promptly, and the structure is retrencied more. Further, the firing assembly is detachably connected with the shell, and the firing assembly can be replaced when not in use, so that the instrument can be reused.

The structure of the surgical stapler according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the embodiments are not intended to limit the scope of the present invention.

As shown in fig. 1-9, an embodiment of the present invention provides a surgical stapler, including: the device comprises a hollow shell 1, wherein a window 13 is formed in the side wall of the shell 1; the nail anvil 2 is fixed inside the shell 1; the firing assembly is positioned on the proximal end side of the nail anvil 2, anastomosis nails are arranged in the firing assembly, at least part of the firing assembly is detachably connected to the shell, and the firing assembly can move along the axial direction of the anastomat; and the driving component 7 is used for pushing the firing component to move towards the direction of the far end side of the anastomat and pushing out the anastomosis nails in the firing component towards the nail anvil 2 when the anastomat is fired.

When suturing tissue or anastomosing a tissue opening using the stapler, a surgical stapler is first placed at a lesion site, for example, the surgical stapler is placed inside the rectum through the anus to suture tissue in the rectum or close the tissue opening. In other embodiments, the surgical stapler can be used for suturing tissue or closing tissue openings in other locations of the alimentary tract, and all fall within the scope of the present invention. Further, the firing assembly is detachably connected with the shell, and the firing assembly can be replaced when not in use, so that the instrument can be reused.

After the surgical stapler is put in place, a tool such as a surgical clamp can be used to pull the tissue to be stapled into the housing 1 through the window 13 on the side wall of the housing 1, so that the tissue enters between the anvil 2 and the firing assembly, then the driving assembly 7 drives the firing assembly to move towards the distal end side of the stapler to clamp the tissue with the anvil 2, that is, the stapler is closed, and then the driving assembly 7 can further drive the staples in the firing assembly to form at the anvil to staple the tissue, so that the tissue is sutured or the tissue opening is closed. Therefore, the utility model discloses a one set of drive assembly can realize that the anastomat is closed and the percussion, and the structure is retrencied more. The casing 1 is tubulose or is similar to tubulose shape, the window 13 set up in the lateral wall of casing 1, and under initial condition, nail anvil 2 with the firing subassembly is located the both ends of window 13, like this, in the anastomotic process of alimentary canal tissue, the anastomat laminating tissue's natural growth form, window 13 is pressed close to the tissue that waits to coincide, is changeed and is waited anastomotic tissue draw-in into being located the casing 1 lateral wall in the window 13, the tissue after the anastomosis more is close to human tissue's natural form, can not cause discomfort such as foreign matter sense after the operation.

In this embodiment, as shown in fig. 3, in an initial state, the firing assembly is located at a proximal side of the window 13, and when the driving assembly 7 pushes the firing assembly to move toward a distal side of the stapler, the firing assembly gradually approaches the anvil 2, gradually covers the window 13, and pushes out staples in the firing assembly toward the anvil 2.

As shown in fig. 3 and 4, the driving assembly 7 includes a driving handle 71 and a second elastic member 73, the driving handle 71 is rotatably connected with the housing 1, and the second elastic member 73 is located between the driving assembly 7 and the housing 1. Specifically, the proximal side of the housing 1 is provided with a fixed handle 12, and the first end 731 and the second end 732 of the second elastic member 73 respectively abut against the fixed handle 12 and the driving handle 71. The driving handle 71 includes an elastic member stopper portion 7131, the elastic member stopper portion 7131 extends along a length direction of the driving handle 71, and the second end 732 of the second elastic member 73 abuts against the elastic member stopper portion 7131 and can move along an extending direction of the elastic member stopper portion 7131.

As shown in fig. 4, the second end 732 of the second elastic member 73 has a tilted portion, which may be tilted upward or downward compared to the main body portion of the second elastic member 73, and the tilted portion abuts against a side of the elastic member stopper 7131 of the driving handle 71 facing the fixed handle 12. The raised portion of the second end 732 may also be shaped as other arc surface, for example, to reduce the friction with the elastic member stop 7131. Further, a through groove 733 is formed at the second end 732 of the second elastic member 73, and the through groove 733 extends along the length direction of the second elastic member 73. Through the through groove 733, the second elastic member 73 is more easily elastically deformed at a side close to the driving handle 71, and an operator can more conveniently compress the second elastic member 73 to deform when holding the driving handle 71.

As shown in fig. 5, the firing assembly includes a cartridge assembly 3 and a firing block 5, the cartridge assembly 3 includes a cartridge 31 for carrying staples, and the anvil 2, the cartridge 31 and the firing block 5 are sequentially arranged along an axial direction of the stapler from a distal side direction to a proximal side direction of the stapler. The firing block 5 is detachably connected with the housing 1, and the firing block 5 and the staple cartridge 31 can move along the axial direction of the anastomat.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side, follows the direction in the axle center of anastomat is the axial, and the direction from the distal end side of anastomat to near-end side promptly, or from the near-end side of anastomat to the direction of distal end side. In the view of fig. 1, the distal side 11 of the housing 1 is the left-hand side of the housing 1, while the fixed handle 12 of the housing 1 is located at the proximal side of the housing 1. In fig. 1, the direction S1 is from the proximal side to the distal side, and the direction S2 is from the distal side to the proximal side. In the perspective of fig. 14, the distal end side 41 of the guide rail 4 is the left end side thereof, and the proximal end side 42 of the guide rail 4 is the right end side thereof. In the present invention, the up-down direction is defined as the up-down direction in the view angle of fig. 1, that is, in fig. 1, the D1 direction is the upward direction. The left-right direction is defined as the direction D2 in fig. 20. In the present invention, for a component, the inner side and the outer side are relative to the axis of the component, the side close to the axis is the inner side, and the side far away from the axis is the outer side.

In this embodiment, as shown in fig. 1 and 2, when the drive handle 71 is grasped to move in a first direction, the drive handle 71 pushes the firing block 5 toward the distal direction of the stapler. As shown in fig. 1, the driving handle 71 includes a firing engagement portion 711, a pivoting portion 712, and a holding portion 713, which are arranged in this order, the pivoting portion 712 is rotatably connected to the housing 1, and the firing engagement portion 711 is rotatably connected to the proximal end side of the firing block 5. In this embodiment, as shown in fig. 3, the stapler further comprises a transmission member 6, and both ends of the transmission member 6 are rotatably connected to the proximal end side of the firing block 5 and the firing engagement portion 711 of the driving handle 71, respectively. The nail anvil 2 and the firing assembly are arranged close to the inner side wall of the shell 1 so as to increase the visual field and the operation space in the shell 1. The firing assembly and the pivot 712 are located on both sides of the housing 1 centerline for higher firing force transfer efficiency. In this embodiment, the firing assembly is located on the upper side of the centerline of the housing 1 and the pivot 712 is located on the lower side of the centerline of the housing 1. In another alternative embodiment, the firing assembly may be located at the lower side of the centerline of the housing 1, the pivot portion 712 may be located at the upper side of the centerline of the housing 1, and the like, all falling within the scope of the present invention.

As shown in FIG. 2, a proximal opening 15 is opened at the proximal side of the housing 1, and the firing assembly enters the interior of the housing 1 from the proximal opening 15. The operator can also see through the proximal opening 15 the inside of the stapler and operate on the tissue to be stapled using surgical tools such as forceps. In this embodiment, the anvil 2 and the cartridge component 3 are both located above the inside of the housing 1, the window 13 is opened on the upper surface of the housing 1, and the position of the window 13 corresponds to the position of the anvil 2, so that the tissue to be anastomosed can be conveniently pulled into between the anvil 2 and the cartridge component 3 through the window 13. In other alternative embodiments, the window 13 may be disposed at other positions on the side wall of the housing 1, and is not limited to the position shown in fig. 2.

As shown in fig. 3, in this embodiment, a distal end opening 111 is formed at a distal end side of the housing 1, and the distal end opening 111 prevents a closed space from being formed between the distal end of the stapler and the tissue cavity when the stapler is placed into the tissue, thereby preventing the influence caused by normally secreted gas or liquid and contents inside the digestive tract. In addition, because the nail anvil 2 and the nail bin assembly 3 are both arranged close to the upper surface of the inner side of the shell 1, and the nail anvil 2 and the nail bin assembly 3 are both wall-shaped structures with small occupied space, an operator can observe the inside of the shell 1 more conveniently, and a larger operation space is provided. In this embodiment, the distal opening 111 is located in the middle of the distal surface of the housing 1, i.e., the distal opening 111 is aligned with the axis of the stapler and is a circular opening. In other alternative embodiments, the distal opening 111 may be opened at other positions, and may have other shapes, for example, the distal opening 111 is at least two circular or oval openings disposed on the distal sidewall and penetrating through the distal sidewall, which all fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the distal surface of the housing 1 may be an arc-shaped surface for guiding, that is, the distal diameter of the housing 1 is smaller than the diameter of the main body portion thereof, so that the distal side thereof forms an approximately conical guide portion, which may more conveniently guide the housing 1 to be inserted into the inside of the rectum through the anus, or guide the housing 1 to more easily enter other lesion sites of the digestive tract, while protecting the mucosal layer from being damaged.

Further, in this embodiment, in order to facilitate the operator's view of the interior of the housing 1, the surgical stapler further comprises a luminous member, which is located inside the housing 1. The luminous component can be a noctilucent coating which is coated on the inner side surface of the shell 1 and can naturally emit light in a dark environment. In other embodiments, the light emitting component may also adopt other structures, such as a light emitting block coated with a noctilucent coating or embedded with a noctilucent coating, and the like, which all fall within the protection scope of the present invention.

The firing process of the surgical stapler is described in detail below with reference to FIGS. 1-15. Fig. 1-9 are schematic views of the surgical stapler in this embodiment in an initial state (i.e., unfired). Fig. 10-14 are schematic views of the surgical stapler of this embodiment as it is fired. FIG. 15 is a schematic view of the surgical stapler in this embodiment being reset after firing is complete.

In this embodiment, in different states, the staple cartridge 31 has a first position and a second position, the second position being located on a distal side of the first position. When the nail bin 31 moves from the first position to the second position, the nail bin 31 gradually covers the window 13. The firing block 5 has a third position, a fourth position distal to the third position, and a fifth position distal to the fourth position.

As shown in fig. 3 and 5, in the initial state, the staple cartridge 31 is located at the first position, which is located at the proximal side of the window 13. At this time, the staple cartridge 31 may be located entirely on the proximal side of the window 13, i.e., not overlapping the window 13, or the staple cartridge 31 may be located partially on the proximal side of the window 13, i.e., partially overlapping the window 13, but entirely on the opposite proximal side of the window 13. As shown in FIGS. 1 and 5, in the initial state, the driving handle 71 is not held, the staple cartridge 31 is in the initial first position, and the firing block 5 is in the initial third position.

In this embodiment, as shown in fig. 5 to 9, the surgical stapler further includes a guide rail 4 extending along an axial direction of the stapler, and the anvil 2, the cartridge assembly 3 and the firing block 5 are sequentially sleeved on the guide rail 4 from a distal side to a proximal side of the stapler. The guide rail 4 can guide and limit the axial movement of the cartridge module 3 and the firing block 5, and keep the cartridge module 3 and the anvil 2 aligned in the axial direction, so as to ensure that the staples in the cartridge module 3 can be formed at the corresponding positions on the anvil surface 22 of the anvil 2 after being pushed out. The distal side 41 of the guide rail 4 may be fixed inside the housing 1, and the anvil 2 may be fixed inside the housing 1, so as to maintain the positional stability of the guide rail 4 and the anvil 2 relative to the housing 1, but the present invention is not limited thereto. After the firing block 5 is separated from the housing 1, the firing block 5 and the cartridge module 3 may be removed from the proximal side 42 of the guide rail 4.

As shown in fig. 5 to 7, in this embodiment, the surgical stapler includes two guide rails 4, and two sides of the anvil 2, the staple cartridge 31 and the firing block 5 are respectively sleeved on the guide rails 4. In other alternative embodiments, the number of the guide rails 4 is not limited to two, and may be one or more, all of which fall within the scope of the present invention. The two sides of the anvil 2 are respectively provided with an anvil guiding portion 21, which is sleeved on the two guide rails 4, and an anvil surface 22 is arranged between the two anvil guiding portions 21. The nail bin 31 comprises two nail bin guiding parts 311 which are respectively sleeved on the two guide rails 4, a nail bin surface 312 is arranged between the two nail bin guiding parts 311, a plurality of nail holes 3121 are arranged in the nail bin surface 312, and the nail holes 3121 can be arranged in a row or in multiple rows. When the nail holes 3121 are in at least two rows, they may be staggered with each other, that is, the nail holes 3121 in the inner ring and the nail holes 3121 in the outer ring have an overlap in the projection in the diameter direction. Staples 33 as shown in fig. 8 are disposed inside the staple holes 3121 of the cartridge 31. When the stapler is fired, the firing block 5 pushes the staples 33 out of the staple holes 3121 of the staple cartridge 31. As shown in fig. 7, a firing plate 51 is disposed at a distal end side of the firing block 5 for pushing out the staples 33 from the staple cartridge 31 when the stapler is fired, and firing guide portions 52 are disposed at both sides of the firing block 5. As shown in fig. 8, the staples 33 include fixed ends 331 and pointed ends 332, and the fixed ends 331 of the staples 33 are fixed to the inside of the cartridge 31. When the stapler is fired, the firing sheet 51 of the firing block 5 pushes the sharp pointed end 332 of the staple 33 to penetrate through the staple hole 3121, and then the sharp pointed end reaches the anvil 2 after penetrating a tissue, and is formed on the anvil surface 22 of the anvil 2, and the fixed end 311 is separated from the staple cartridge 31 and fixed on the tissue, thereby achieving the anastomosis of the tissue. The shape and configuration of the staple in fig. 8 are exemplary only, and in alternative embodiments, the staple may take on other shapes and configurations without departing from the scope of the present invention. For example, in another alternative embodiment, the staples are "B" shaped staples, and the staples include two legs capable of piercing tissue, and when the staples are formed on the anvil, the two legs of the staples are pressed against the staple slots of the anvil to be bent and deformed, so that the staples are formed into the "B" like shape.

As shown in fig. 10 and 11, when the driving handle 71 is held in the first direction (i.e., S3 direction in fig. 10), the driving handle 71 rotates in the first direction, the firing engagement portion 711 pushes the firing block 5 in the distal direction (i.e., S1 direction in fig. 1), so that the firing block 5 moves from the third position to the fourth position in the distal direction, i.e., to the position shown in fig. 12, during the movement of the firing block 5 from the third position to the fourth position, the firing block 5 and the staple cartridge 31 are linked, and the staple cartridge 31 moves distally to the second position under the pushing action of the firing block 5, wherein the second position is the operation position where the anvil 2 and the staple cartridge 31 clamp the tissue, i.e., the closing of the stapler is realized. At this time, the second elastic member 73 is pressed by the driving handle 71 to have a certain elastic deformation amount.

With the firing block 5 in the fourth position, the drive handle 71 continues to be grasped in the first direction, and the drive handle 71 drives the firing block 5 to continue moving in the distal direction to the fifth position, i.e., the position of the firing block 5 shown in FIG. 13. As shown in fig. 13 and 14, in the process that the firing block 5 moves from the fourth position to the fifth position, the firing block 5 is no longer in linkage with the staple cartridge 31, the position of the staple cartridge 31 remains unchanged at the second position, the distal end side of the firing block 5 at least partially enters the inside of the staple cartridge 31, so that the distal end side of the firing block 3 can push out staples inside the staple cartridge 31 towards the anvil 2, and the stapler is fired, at this time, the second elastic member 73 is further pressed by the driving handle 71 and has a larger elastic deformation amount. Therefore, the utility model can realize the closing and the firing of the anastomat through one driving handle 71.

As shown in fig. 15, after the stapler is fired, the operator releases the driving handle 71, i.e., the holding force of the driving handle 71 is removed, and at this time, the driving handle 71 is rotated in the second direction (i.e., the direction of S4 in fig. 15) from the firing position by the elastic deformation restoring force of the second elastic member 73, and rebounds to the initial position, so that the resetting of the stapler is realized, and the second direction is opposite to the first direction. Further, since the driving handle 71 is rotatably connected to the firing assembly, when the driving handle 71 rotates in the second direction, the driving handle 71 drives the firing block 5 to move towards the proximal direction of the stapler, so as to return the staple cartridge 31 to the first position.

Only one structure of the second elastic member 73 is shown in this embodiment. In other alternative embodiments, the second elastic element 73 may also be disposed between the fixed handle 12 and the trigger matching portion 711 of the driving handle 71, or between the sidewall of the housing 1 and the trigger matching portion 711 or the holding portion 713 of the driving handle 71, which all fall within the protection scope of the present invention. In other alternative embodiments, the second elastic member 73 may also adopt an elastic structure such as a compression spring, a tension spring, a torsion spring, and the like.

As shown in fig. 7, 9 and 14, in this embodiment, the firing assembly further comprises a first elastic member 32, and two ends of the first elastic member 32 respectively abut against the staple cartridge 31 and the firing block 5. The first elastic member 32 is located inside the staple cartridge 31, a distal end side of the first elastic member 32 abuts against a distal end side of the staple cartridge 31, and a proximal end side of the first elastic member 32 abuts against a distal end side of the firing block 5.

As shown in fig. 7, in this embodiment, the first elastic member 32 includes two compression springs, which are respectively disposed in the two magazine guide portions 311 of the magazine 31 and respectively fit over the two guide rails 4. The first elastic piece 32 is arranged between the distal side surface of the firing guide part 52 and the distal side surface of the nail box 31.

In an initial state (i.e., the state of fig. 9), the staple cartridge 31 is in the first position, the firing block 5 is in the third position, at this time, the first elastic member 32 may be in an uncompressed state, or may be in a state with a certain initial compression amount, at this time, the driving handle 71 is held, the pushing force of the driving handle 71 to the firing block 5 is insufficient to overcome the force resisting the deformation of the first elastic member 32, so that the staple cartridge 31 and the firing block 5 are linked through the first elastic member 32, the firing block 5 pushes the staple cartridge 31 to move towards the anvil 2 side synchronously, the firing block 5 moves to the fourth position, and the staple cartridge 31 moves to the second position (i.e., the state of fig. 12). At this time, since the staple cartridge 31 and the anvil 2 clamp tissue together, when the driving handle 71 is continuously held, the tissue may receive resistance to the continuous distal movement of the staple cartridge 31, so that the holding force of the driving handle 71 needs to be increased, the pushing force of the driving handle 71 to the firing block 5 is increased to overcome the force resisting the deformation of the first elastic member 32, and the first elastic member 32 is compressed to deform, at this time, the staple cartridge 31 does not move in the distal direction any more, and the firing block 5 continues to move distally to the fifth position (i.e., the state of fig. 13 and 14). The firing sheet 51 of the firing block 5 protrudes from the distal end side of the firing guide portion 52, so that the firing sheet 51 contacts the staples in the staple cartridge 31 and pushes out the staples toward the anvil 2, thereby implementing the firing of the stapler.

After the stapler is fired, when the driving handle 71 is rotationally reset in the second direction under the action of the first elastic element 73, the driving handle 71 drives the cartridge module 3 to move back to the first position of the initial state in the proximal direction of the stapler. Meanwhile, when the driving handle 71 is rotationally reset in the second direction, the first elastic member 32 is no longer pushed in the distal direction, and pushes the firing plate 51 in the proximal direction by its own elastic restoring force, so that the firing block 5 is retracted to the third position inside the magazine 31 in the initial state with respect to the magazine 31 by the first elastic member 32. In different embodiments, the first elastic element 32 may be a spring, a metal elastic sheet, or a flexible material block that can be compressed after receiving an external force, such as a rubber block, a silicone block, etc., all of which belong to the protection scope of the present invention.

In another alternative embodiment, instead of providing the first elastic member 32, a friction damping mechanism may be provided between the outer wall of the distal end side of the firing block 5 and the inner wall of the proximal end side of the staple cartridge 31 (for example, a friction damping layer of rubber particles is provided on the inner wall of the proximal end side of the staple cartridge 31 or the outer wall of the distal end side of the firing block 5), in an initial state, the driving handle 71 is held, the pushing force of the driving handle 71 to the firing block 5 is not enough to overcome the friction force of the friction damping mechanism, so that the staple cartridge 31 and the firing block 5 are linked by the friction damping mechanism, the firing block 5 pushes the staple cartridge 31 to move towards the side of the anvil 2 synchronously, the firing block 5 moves to the fourth position, and the staple cartridge 31 moves to the second position (i.e., the state of fig. 12). At this time, since the staple cartridge 31 and the anvil 2 clamp the tissue together, when the driving handle 71 is continuously held, the tissue may receive the resistance to the continuous distal movement of the staple cartridge 31, so that the holding force of the driving handle 71 needs to be increased, the pushing force of the driving handle 71 to the firing block 5 is increased to overcome the friction force of the friction damping mechanism, at this time, the staple cartridge 31 does not move in the distal direction under the reaction force of the tissue, and the firing block 5 continues to move in the distal direction to the fifth position (i.e., the state of fig. 13). The firing sheet 51 of the firing block 5 protrudes from the distal end side of the firing guide portion 52, so that the firing sheet 51 contacts the staples in the staple cartridge 31 and pushes out the staples toward the anvil 2, thereby implementing the firing of the stapler.

Fig. 16 and 17 illustrate the mating arrangement between the drive handle 71, the housing 1, and the firing assembly. As shown in fig. 17, a mounting groove 121 is formed in the fixed handle 12, the pivot portion 712 of the driving handle 71 is located in the mounting groove 121, and the pivot portion 712 can rotate in the mounting groove 121. Specifically, the side wall of the mounting groove 121 is provided with a first through hole 122, the pivot portion 712 of the driving handle 71 is provided with a second through hole 7121, the driving assembly 7 further includes a second connecting member 75, and the second connecting member 75 is disposed through the first through hole 122 and the second through hole 7121 of the pivot portion 712, so that the pivot portion 712 can rotate around the second connecting member 75. In this embodiment, the fixing handle 12 is angled with respect to the axial direction of the stapler, so that the operator can conveniently hold the stapler without blocking the proximal opening 15 of the housing 1, and the operator can more conveniently observe the inside of the housing 1 from the proximal opening 15. In other alternative embodiments, the fixing handle 12 may also be disposed to extend along the axial direction of the stapler, or may adopt other shapes and/or other connection modes with the housing 1, which fall within the protection scope of the present invention. In other alternative embodiments, the fixing handle 12 may not be provided with the mounting groove, the outer sidewall of the driving handle 71 is attached to the outer sidewall of the fixing handle 12, or a mounting groove is provided in the driving handle 71, and the fixing handle 12 is disposed in the mounting groove in a penetrating manner, which all fall within the protection scope of the present invention.

In this embodiment, when the firing assembly needs to be replaced without using the surgical stapler, the second linkage 75 can be disengaged from the first through hole 122 and the second through hole 7121, and when the second linkage 75 is disengaged from the first through hole 122 and/or the second through hole 7121, the firing assembly is entirely disengaged from the housing 1. At the same time, the firing assembly may be separated from the housing 1 such that the drive handle 71 and the firing assembly may be separated together from the housing 1. The second connector 75 includes an operation portion 751 and a connection portion 752, the connection portion 752 is inserted into the first through hole 122 and the second through hole 7121, the operation portion 751 is located outside the driving handle 71, and the connection portion 752 can be pulled out from the first through hole 122 and the second through hole 7121 by performing a pulling-out operation on the operation portion 751.

As shown in fig. 16 to 18, the firing block 5 is detachably connected to the housing 1 through a first connecting member 8, a guide groove 56 extending along an axial direction of the stapler is disposed on a side surface of the firing block 5, the first connecting member 8 is fixed to the housing 1, the first connecting member 8 is partially located in the guide groove 56, and the first connecting member 8 is movable along an extending direction of the guide groove 56, so that the firing block 5 is movable relative to the housing 1 along the axial direction of the stapler, and the guide groove 56 can also provide a guide for the axial movement of the firing block 5. The guide slot 56 is a through slot that communicates the upper and lower sides of the firing block 5.

Specifically, as shown in fig. 19 and 20, the first connecting element 8 includes a first matching portion 81, a connecting portion 82 and a second matching portion 83, which are sequentially arranged, the widths of the first matching portion and the second matching portion are greater than the width of the guide groove, the first matching portion 81 is fixedly connected with the housing 1, and the connecting portion 82 is inserted into the guide groove 56, so that the first matching portion 81 and the second matching portion 83 are respectively located at the inner side and the outer side of the firing block 5, where the first matching portion 81 and the second matching portion 83 are respectively located at the inner side and the outer side of the firing block 5 means that the first matching portion 81 and the second matching portion 83 are respectively located at the upper side and the lower side of the firing block 5. As shown in fig. 17, a connecting member mounting groove 16 is formed on the housing 1, and the first fitting portion 81 is fixedly embedded in the connecting member mounting groove 16. In other alternative embodiments, the first matching portion 81 and the housing 1 may be fixedly connected by other means, for example, by a fastener such as a bolt, a rivet, a pin, a snap, etc. to fixedly connect the first matching portion 81 and the side wall of the housing 1.

In this embodiment, the first matching portion 81 extends along the width direction of the firing block 5 (i.e., the direction D2 in fig. 20), but the present invention is not limited thereto, and in other alternative embodiments, the first matching portion 81 may be provided in other shapes.

In another alternative embodiment, the first matching portion 81 may also be connected to a portion of the housing 1, and specifically, a first connector mounting portion (for example, a bump, a beam, or the like) is provided on the housing 1, and the first matching portion is connected to the first connector mounting portion. For example, the first connecting piece mounting part is a bump, and a groove matched with the bump is arranged on the first matching part, or the first matching part is in threaded connection with the first connecting piece mounting part, riveted connection with the first connecting piece mounting part, and the like. The width of the first mating portion may be smaller than or equal to the width of the guide groove 56, and the first mating portion is kept from entering the inside of the guide groove 56 by the connection of the housing 1 and the first mating portion.

Further, as shown in fig. 19 and 20, in order to realize the detachable connection of the first connecting piece 8 and the firing block 5, a distal end side of the guide groove 56 is provided with a guide groove hole 561, the width of the guide groove hole 561 is larger than that of the second matching part 83, and when the second matching part 83 moves to the guide groove hole, the second matching part 83 can be separated from the guide groove 56 through the guide groove hole 561, so that the firing block 5 is separated from the housing 1. Here, the width refers to a width in a direction D1 in fig. 20.

Fig. 20 and 21 show the arrangement of the first linkage 8 in cooperation with the firing block 5 in an initial state and a fired state, respectively. As shown in fig. 20, in the initial state, the firing block 5 is located at the third position, and the second engaging portion 83 of the first link 8 is located at the proximal side of the guide slot 561. At this time, under the holding action of the driving handle 71, the firing block 5 will not be displaced in the proximal direction, and the second engaging portion 83 will not enter the guide slot 561 and separate from the guide slot 56, so that the firing block 5 and the housing 1 are relatively stably connected in the initial state. As shown in fig. 21, in the firing state, the firing block 5 moves to the fourth position in the distal direction, the first connecting element 8 moves towards the proximal end 562 of the guide slot 56, and the second engaging portion 83 does not separate from the guide slot 56 during the movement, so that the relatively stable connection between the firing block 5 and the housing 1 during the firing process is ensured.

When the surgical stapler is not used and the firing assembly needs to be removed, the second link 75 is first pulled out, the driving handle 71 is separated from the fixed handle 12, the driving handle 71 can pull the firing block 5 in the proximal direction, so that the first link 8 moves relative to the firing block 5 in the distal direction of the guide slot 56, and when the second matching part 83 moves to the guide slot hole, the second matching part 83 can be separated from the guide slot 56 through the guide slot hole 561, so that the driving handle 12 and the firing block 5, the cartridge assembly 3 can be taken out from the housing 1 together.

As shown in fig. 16, in this embodiment, a first pivot shaft 54 is provided on the proximal side of the firing block 5, and one end of the transmission member 6 includes a hook portion 61, and the hook portion 61 is rotatably hung on the first pivot shaft 54. The firing engagement portion 711 of the driving handle 71 is provided with a second pivot shaft 7111, and the second end of the transmission member 6 includes a first connection hole 62, and the first connection hole 62 is rotatably sleeved on the second pivot shaft 7111. The hook portion 61 is rotatable at an angle relative to the first pivot shaft 54 to disengage from the first pivot shaft 54. Therefore, after the firing block 5 is separated from the housing 1, by removing the hook portion 61 from the first pivot shaft 54, the firing block 5 can be further separated from the drive handle 71.

As shown in fig. 16, in this embodiment, a stopper 57 is provided on the proximal end side of the firing block 5, the stopper 57 is located on the distal end side of the first pivot shaft 54, and the proximal end side of the stopper 57 is disposed opposite to the distal end side of the hook 61. The stop 57 may define the position relationship between the hook portion 61 of the transmission member 6 and the firing block 5, preventing the hook portion 61 from accidentally disengaging from the first pivot shaft 54 during use of the stapler. Further, the proximal side surface of the stopper portion 57 and the distal side surface of the hook portion 61 are respectively corresponding inclined guide surfaces.

As shown in fig. 22 and 23, the driving assembly 7 may further include a safety pin 74 for limiting the position of the driving handle 71 at the initial position when the surgical stapler does not reach the surgical position, so as to prevent the occurrence of the false firing.

As shown in fig. 22 and 23, a third through hole 1211 is formed in a side wall of the mounting groove 121, the safety pin 74 passes through the third through hole 1211 to enter the mounting groove 121, and the safety pin 74 can be pulled out of the third through hole 1211. In this embodiment, the safety pin 74 includes a protrusion 741 and a blocking portion 742, in an initial state, the blocking portion 742 penetrates through the third through hole 1211 to at least partially enter the installation groove 121, the protrusion 741 is located outside a sidewall of the installation groove 121, and an outer diameter of the protrusion 741 is larger than an inner diameter of the third through hole 1211. The outer diameter of the blocking portion 742 is slightly smaller than the inner diameter of the third through-hole 1211, so that the blocking portion 742 can be pulled out of the third through-hole 1211 when the stapler is to be fired.

As shown in fig. 22, in the initial state, when the surgical stapler has not reached the surgical position, the safety pin 74 passes through the third through hole 1211 and enters at least partially into the mounting groove 121, and the safety pin 74 is located on the driving handle 71 along the first reverse rotation path. At this time, if the driving handle 71 is held, the rotation of the driving handle 71 in the first direction is blocked by the safety pin 74, and the firing assembly is not driven, and the stapling device is not fired by mistake. As shown in fig. 23, when the surgical stapler reaches the surgical site and the stapler needs to be fired, the safety pin 74 can be pulled out from the third through hole 1211 of the mounting groove 121, and at this time, the safety pin 74 can not block the rotation movement of the driving handle 71 in the first direction any more, and the driving handle 71 is held, so that the firing of the stapler can be realized.

Referring to fig. 24-26, there is shown a structure of a surgical stapler according to another embodiment of the present invention. As in the embodiment shown in fig. 1 to 23, when the second engagement portion 83 moves to the guide slot hole, the second engagement portion 83 can be separated from the guide slot 56 through the guide slot hole 561. This embodiment differs from the embodiment shown in FIGS. 1-23 in that: the firing assembly can be separately detached from the housing 1 and replaced separately. One end of the transmission piece 6 comprises a second connecting hole 63, a transmission piece matching part 59 is arranged at the near end side of the firing block 5, a third connecting hole 58 is formed in the transmission piece matching part 59, and the second connecting hole 63 is rotationally connected with the third connecting hole 58 through a connecting pin 9.

One end of the connecting pin 9 is inserted into the second connecting hole 63 and the third connecting hole 58, and the other end is positioned outside the second connecting hole 63 and the third connecting hole 58, so that an operator can hold the connecting pin by hand. The connecting pin 9 can be disengaged from the second connecting hole 63 and the third connecting hole 58. When the firing assembly needs to be replaced, the cartridge assembly and the firing block 5 can be detached from the shell 1 after the connecting pin 9 is operated to enable the connecting pin 9 to be detached from the second connecting hole 63 and/or the third connecting hole 58. Thus, in this embodiment, the firing assembly may be replaced separately without the need to separate the drive handle 71 from the housing 1.

To sum up, the utility model provides an anastomotic apparatus to tissue, the surgical stapler is placed in pathological change position in the use, will need anastomotic tissue to draw in between nail anvil and the percussion subassembly through the window, accomplishes the percussion of anastomat through operation drive assembly drive percussion subassembly, through the anastomotic nail in the percussion subassembly at nail anvil department shaping and anastomosing to the tissue, realized that the tissue is sewed up or the tissue opening is closed, the structure is retrencied, easy operation, and the percussion subassembly with casing detachably connects, can conveniently change when not using, realizes the reuse of apparatus, for example in the patient that takes place anus rectum fistula, often fistula way and fistula are more than one, only need to change percussion subassembly can, can reduce patient's cost.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A surgical stapler, comprising:

the side wall of the shell is provided with a window;

the nail anvil is fixed inside the shell;

2. The surgical stapler of claim 1, wherein the firing assembly comprises a cartridge assembly and a firing block, the anvil, the cartridge assembly, and the firing block being sequentially arranged in a distal to proximal direction along an axial direction of the stapler, the firing block being detachably connected to the housing.

3. The surgical stapler of claim 2, wherein the firing block is detachably connected to the housing by a first connector fixedly secured to the housing, the firing block is provided with a guide slot extending in an axial direction of the stapler, the first connector is partially disposed in the guide slot, and the first connector is movable in a direction along which the guide slot extends.

4. The surgical stapler of claim 3, wherein the first connector includes a first mating portion, a connecting portion, and a second mating portion arranged in sequence, the second mating portion having a width greater than the width of the guide slot, the housing defining a connector mounting slot; the first matching portion is fixedly embedded in the connecting piece mounting groove, and the connecting portion penetrates through the guide groove, so that the first matching portion and the second matching portion are located on the inner side and the outer side of the firing block respectively.

5. The surgical stapler of claim 3, wherein the housing defines a first connector mounting portion, the first connector including a first mating portion, a connecting portion, and a second mating portion arranged in series, the second mating portion having a width greater than a width of the guide slot; the first matching portion is connected with the first connecting piece installation portion, and the connecting portion penetrates through the guide groove, so that the second matching portion is located on one side, away from the casing, of the firing block.

6. The surgical stapler of claim 4 or 5, wherein a distal side of the guide slot is provided with a guide slot hole having a width larger than a width of the second engaging portion, the second engaging portion being separable from the guide slot through the guide slot hole when the second engaging portion is moved to the guide slot hole.

7. The surgical stapler of claim 1, wherein in an initial state, the firing assembly is positioned on a proximal side of the window, and wherein as the drive assembly pushes the firing assembly in a direction toward a distal side of the stapler, the firing assembly gradually covers the window and pushes staples in the firing assembly out toward the anvil.

8. The surgical stapler of claim 6, wherein the drive assembly includes a drive handle including a firing engagement portion, a pivot portion, and a gripping portion arranged in series, the pivot portion rotatably coupled to the housing, the firing engagement portion rotatably coupled to the firing assembly, the gripping portion gripped such that rotation in a first direction causes the firing assembly to move toward the anvil.

9. The surgical stapler of claim 8, wherein the proximal side of the housing is provided with a fixed handle, the pivot portion being detachably connected to the fixed handle by a second connector;

10. The surgical stapler of claim 9, wherein the stationary handle has a mounting slot formed therein, the pivot portion of the driving handle being located in the mounting slot, the stapler further comprising a safety pin, a side wall of the mounting slot having a third through hole formed therein, the safety pin passing through the third through hole to enter at least partially into the mounting slot, and the safety pin being extractable from the through hole;

11. The surgical stapler of claim 8, further comprising a transmission member rotatably connected at both ends to the proximal side of the firing assembly and the firing interface of the drive handle, respectively.

12. The surgical stapler of claim 11, wherein a proximal side of the firing assembly is provided with a first pivot shaft, wherein one end of the transmission member includes a hook portion rotatably suspended from the first pivot shaft and rotatable relative to the first pivot shaft at an angle away from the first pivot shaft, wherein upon disengagement of the hook portion from the first pivot shaft, the cartridge assembly can be disengaged from the housing.

13. The surgical stapler of claim 12, wherein a proximal side of the firing assembly is provided with a stop, the stop being located on a distal side of the first pivot shaft, and a proximal side of the stop being disposed opposite a distal side of the hook portion;

14. The surgical stapler of claim 11, wherein one end of the transmission member includes a second connection hole, a proximal side of the firing block is provided with a third connection hole, the second connection hole and the third connection hole are rotatably connected by a connection pin, the connection pin is disengageable from the second connection hole and the third connection hole; after the connecting pin is separated from the second connecting hole and/or the third connecting hole, the nail cartridge assembly can be separated from the shell.

15. The surgical stapler of claim 8, wherein the anvil and the firing assembly are disposed proximate to an inner sidewall of the housing, the firing assembly and the pivot portion being disposed on opposite sides of a centerline of the housing.

16. The surgical stapler of claim 8, wherein the driving assembly further comprises a second elastic member, the second elastic member is disposed between the driving handle and the housing, the driving handle drives the firing assembly to move toward the distal end of the stapler when the driving handle is rotated in the first direction by an external force, the second elastic member is elastically deformed, and the driving handle is rotationally restored in the second direction by an elastic deformation restoring force of the second elastic member after the external force is removed.

17. The surgical stapler of claim 2, wherein the staple cartridge assembly comprises a staple cartridge having a first position and a second position, wherein in an initial state the staple cartridge is in the first position, and wherein upon firing of the stapler the drive assembly urges the staple cartridge to move in a distal direction of the stapler to the second position via the firing block;

when the nail bin is located at the second position, the driving assembly continues to push the firing block to move towards the direction of the far end side of the anastomat, and the firing block pushes out the anastomosis nails in the nail bin towards the nail anvil.

18. The surgical stapler of claim 17, wherein the cartridge assembly comprises a cartridge and a first resilient member positioned within the interior of the cartridge, a distal side of the first resilient member abutting a distal side of the cartridge and a proximal side of the resilient member abutting a distal side of the firing block;

19. The surgical stapler of claim 2, further comprising a guide rail extending in an axial direction of the stapler, wherein the anvil and the firing assembly are nested on the guide rail, and wherein the firing assembly is separable from the guide rail from a proximal side of the guide rail when the firing assembly is separated from the housing.

20. The surgical stapler of claim 1, further comprising a light emitting member located inside the housing.