Percussion piece, nail bin assembly and surgical anastomat

Abstract

The utility model provides a percussion piece, a nail bin assembly and a surgical anastomat, the percussion piece is used for the nail bin assembly of the surgical anastomat and can be driven to move in the axial direction of the surgical anastomat, and at least one row of anastomosis nails arranged in the axial direction are arranged in the nail bin assembly; the percussion piece comprises a body part and at least one nail pushing part, the nail pushing part is at least partially located on the far end side of the body part, the upper surface of the nail pushing part is provided with a nail pushing face, and the nail pushing face is provided with at least one limiting part; wherein each nail pushing part corresponds to a row of anastomosis nails, and when the percussion piece moves towards the far end to drive the anastomosis nails, the limiting part at least partially acts on the anastomosis nails. The limiting part is arranged on the far end side of the percussion piece, the anastomosis nail in the forming process is guided and limited, transverse deviation of the anastomosis nail under the action of external force is compensated, and the operation effect is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a firing member, a staple cartridge assembly and a surgical stapler. Background Art

[0002] In the prior art, a medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a staple head mounted on the instrument platform. The staple head can be passed through a small incision on the body by a puncture device to approach the surgical site for surgery. The staple head includes a staple magazine assembly and a staple anvil that are relatively arranged. The staple magazine assembly includes a staple band, a support member supporting the staple band, and a staple magazine cover that accommodates the staple band and the support member, and a firing member is provided on the proximal side of the staple magazine cover. When the stapler is fired, the cutter is pushed toward the distal side by the pusher rod, and the cutter drives the firing member to move toward the distal side of the stapler, and the firing member pushes out the staples rotatably connected to the staple band body, and the cutter cuts off the tissue between the staple magazine assembly and the staple anvil, thereby achieving the firing of the stapler.

[0003] In the existing stapler, when the firing member pushes the staples outward, the staple legs will encounter resistance from the tissue when piercing the tissue. Since there is a certain gap on both sides of the staples, the staples may deviate to the left or right under the action of external force, which affects the staple forming effect, resulting in poor suturing effect on the tissue and seriously affecting the surgical effect. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of the present application is to provide a firing member, a stapler assembly and a surgical stapler. By setting a limiting portion on the distal side of the firing member, the staples in the forming process are guided and limited, the lateral displacement of the staples under the action of external force is compensated, and the surgical effect is improved.

[0005] The embodiment of the present application provides a firing member, which is used in a stapler cartridge assembly of a surgical stapler and can be driven to move along the axial direction of the surgical stapler, wherein the stapler cartridge assembly is provided with at least one row of staples arranged along the axial direction; the firing member comprises a main body and at least one staple pushing portion, wherein the staple pushing portion is at least partially located at the distal end side of the main body, an upper surface of the staple pushing portion is provided with a staple pushing surface, and at least one section of the staple pushing surface is provided with a limiting portion;

[0006] Wherein, each of the staple pushing portions corresponds to a row of staples, and when the firing member moves in the distal direction to drive the staples, the limiting portion at least partially acts on the staples so that the limiting portion compensates for the lateral displacement of the staples.

[0007] In some embodiments, the limiting portion is a limiting groove arranged along the length direction of the nail pushing surface.

[0008] In some embodiments, the stapler includes a staple body, the limiting groove has a first projection in a first plane perpendicular to the axial direction, the staple body has a second projection in the first plane, and both side edges of the first projection are respectively located outside the two side edges of the second projection.

[0009] In some embodiments, the limiting groove includes a first side wall and a second side wall respectively extending along the length direction of the nail pushing surface, and the first side wall and the second side wall are symmetrically arranged relative to the center line of the limiting groove.

[0010] In some embodiments, the limiting portion includes a first end and a second end, the second end is located on the proximal side of the first end, and the limiting portion extends along the length direction of the nail pushing surface from the first end to the second end of the limiting portion, and the contour trend of the limiting portion is adapted to the trend of the nail pushing surface; the first end and the second end are smoothly transitionally connected to the nail pushing surface.

[0011] In some embodiments, the limiting groove is in an arc shape as a whole to adapt to the shape of the nail pushing surface.

[0012] In some embodiments, the main body portion includes a first main body portion and a second main body portion, the nail pushing portion is fixedly connected to the first main body portion, and the first main body portion is installed on the distal side of the second main body portion.

[0013] In some embodiments, the nail pushing portion includes a first nail pushing portion and a first nail pushing portion, the main body portion includes a first main body portion and a second main body portion, the first nail pushing portion and the first main body portion are fixedly connected, the second nail pushing portion and the second main body portion are fixedly connected, the first main body portion is installed on the distal side of the second main body portion, and the first nail pushing portion is located on the inner side of the second nail pushing portion.

[0014] In some embodiments, it includes a plurality of spaced-apart limiting portions, and the plurality of limiting portions are arranged along the length direction of the nail pushing surface.

[0015] In some embodiments, the limiting portion is a protrusion, and a limiting groove is provided on the surface of each limiting portion.

[0016] In some embodiments, the limiting portion includes a limiting protrusion arranged along the length direction of the nail pushing surface. When the firing member moves to the point where the nail pushing portion abuts against the staple, the limiting protrusion is at least partially located on the outside of the corresponding staple and / or on the inside of the staple to compensate for the lateral deviation of the staple to the outside and / or inside.

[0017] A second aspect of the present application also provides a nail magazine assembly, including the firing member.

[0018] The third aspect of the present application also provides a surgical stapler, comprising the above-mentioned staple magazine assembly.

[0019] The firing member, staple cartridge assembly and surgical stapler provided by the present application have the following advantages:

[0020] The present application provides a limiting portion on the distal side of the firing member. When the firing member moves in the distal direction to drive the staple, the limiting portion at least partially acts on the staple, so that in the process of the staple pusher driving the staple to rotate, the limiting portion and the staple are at least partially abutted against each other, and the staple is guided and limited during the forming process, thereby compensating for the lateral displacement of the staple under the action of external force, improving the suturing effect of the staple, and effectively improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0022] Figure 1 is a structural schematic diagram of a nail magazine assembly of Example 1 of the present application;

[0023] Figure 2 is a three-dimensional diagram of the cooperation between the firing member and the nail belt of Example 1 of the present application;

[0024] Figure 3 is a front view of the cooperation between the firing member and the nail belt of Example 1 of the present application;

[0025] Figure 4 yes Figure 3 Cross-sectional view along the C1-C1 direction;

[0026] Figure 5 is a left side view of the firing member of Example 1 of the present application;

[0027] Figure 6 yes Figure 5 The schematic diagram of the center A is enlarged and rotated counterclockwise;

[0028] Figure 7 is a three-dimensional diagram of a firing member of Example 2 of the present application;

[0029] Figure 8 is an exploded view of the firing member of Example 2 of the present application;

[0030] Fig. 9 is a three-dimensional diagram of a firing member of Example 3 of the present application;

[0031] Fig.10 is an exploded view of the firing member of Example 3 of the present application;

[0032] Fig.11is a left side view of the firing member of Example 3 of the present application;

[0033] Fig.12 yes Fig.11 The schematic diagram of point B in the middle is enlarged and rotated counterclockwise;

[0034] Fig.13 is a three-dimensional diagram of a firing member of Example 4 of the present application;

[0035] Fig.14 is an exploded view of the firing member of Example 4 of the present application;

[0036] Fig.15 is a three-dimensional diagram of a firing member of Example 5 of the present application;

[0037] Fig.16 is a front view of the firing member of Example 5 of the present application;

[0038] Fig.17 is a top view of the firing member of Example 5 of the present application;

[0039] Fig.18 is a partial schematic diagram of a firing member of Example 6 of the present application;

[0040] Fig.19 is a partial schematic diagram of a firing member of Example 7 of the present application;

[0041] Fig. 20 is a partial schematic diagram of a firing member of Example 8 of the present application;

[0042] Fig.21 is a partial schematic diagram of a firing member of Example 9 of the present application;

[0043] Fig. 22 is a partial schematic diagram of a firing member of Example 10 of the present application;

[0044] Fig.23 is a schematic structural diagram of a firing member according to embodiment 11 of the present application;

[0045] Fig.24 It is a schematic diagram of the structure of the firing member of Example 12 of the present application.

[0046] Reference numerals:

[0047] 1 firing member (embodiment 1) 332 third body part

[0048] 11 Pushing nail part 334 Fourth assembly part

[0049] 110 Pushing nail surface 4 Firing member (Example 5)

[0050] 111 limiting groove 41 nail pushing part

[0051] 1111 First side wall 410 Nail pushing surface

[0052] 1112 second side wall 411 limiting portion

[0053] 111a First side edge 412 Limiting groove

[0054] 111b Second side 42 Main body

[0055] 12 Main body 43 Nail cutting part

[0056] 13 Nail cutting part 5a-5c Firing member (Examples 6-8)

[0057] 2 Firing member (Example 2) 51a-51c Nail pushing part

[0058] 21 First component 511a-511c Limiting groove

[0059] 211 First nail pushing part 6 Firing member (Examples 9 and 10)

[0060] 2111 First limiting groove 61 Nail pushing part

[0061] 212 first body portion 610 nail pushing surface

[0062] 2121 first assembly portion 62 limiting convex portion

[0063] 22 Second component 621 Guide surface

[0064] 221 Second nail pushing part 7 Trigger (Examples 11 and 12)

[0065] 2211 Second limiting groove 71 Nail pushing part

[0066] 222 Second body portion 710 Nail pushing surface

[0067] 2221 second assembly portion 711 first position limiting groove

[0068] 223 nail cutting part 712 second position limiting groove

[0069] 3 Trigger (Examples 3 and 4) 713 Third position limit slot

[0070] 31 first component 72 main body

[0071] 311 nail pushing part 73 nail cutting part

[0072] 3111 Limiting slot 100 Nail magazine cover

[0073] 312 first body portion 101 nail hole

[0074] 313 First assembly part 200 Nail belt

[0075] 32 Second component 201 Nail belt body

[0076] 321 second staple pusher 203 staple

[0077] 3211 Second limiting groove 2031 Nail connection part

[0078] 322 second body part 2032 nail body

[0079] 323 Second assembly part 2033 Nail foot

[0080] 324 third assembly part 300 support member

[0081] 33 Third component P First plane

[0082] 331 Nail cutting department DETAILED DESCRIPTION

[0083] Example embodiments will now be described more fully. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the present application will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present application. Although "first" or "second" etc. are used in this specification to represent certain features, they are only used to represent the function, and are not used as a limitation on the number and importance of specific features.

[0084] The present application provides a firing member, a stapler assembly and a surgical stapler. The surgical stapler comprises an instrument platform, a firing handle movably connected to the instrument platform and a stapler head mounted on the instrument platform. The stapler head comprises a stapler assembly and a staple anvil arranged opposite to each other. The stapler assembly comprises a firing member and at least one row of staples arranged along the axial direction, and the firing member can be driven to move along the axial direction of the surgical stapler. The firing member comprises a body and at least one staple-pushing portion, the staple-pushing portion is at least partially located at the distal end side of the body, the upper surface of the staple-pushing portion is provided with a staple-pushing surface, and the staple-pushing surface is provided with at least one section of a limiting portion. Wherein, each of the staple-pushing portions corresponds to a row of the staples, and when the firing member moves in the distal direction to drive the staples, the limiting portion at least partially acts on the staples, so that the limiting portion limits and guides the staples during the forming process, compensates for the lateral deviation of the staples, improves the staple suturing effect, and thus effectively improves the surgical effect. In the present application, the limiting portion compensates for the lateral displacement of the staple by only compensating for the displacement of the staple to one side (for example, the displacement to the left or the displacement to the right), or the limiting portion can compensate for the displacement of the staple to both the left and right sides.

[0085] The specific structure of the firing member and the staple magazine assembly including the firing member will be described below in conjunction with specific embodiments. It will be understood that the drawings and the following descriptions are only examples and are not intended to limit the scope of protection of the present application. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated descriptions will be omitted. In the present application, the distal end and the proximal end are relative to the operator, the end closer to the operator is the proximal end, and the end farther from the operator, that is, the end closer to the surgical site is the distal end, and the direction along the axis of the stapler is the axial direction, that is, the direction from the distal end to the proximal end of the stapler, or from the proximal end to the distal end of the stapler. As Figure 1 and Figure 2 As shown in the figure, the S1 direction is the direction from the proximal end to the distal end of the stapler, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler. Figure 1 The S2 direction is the longitudinal direction of the stapler, that is, the height direction. Figure 2 The middle S3 direction is the lateral direction of the stapler, i.e. the width direction. In the present application, for a component, the inside and the outside are relative to the center line of the component, the side close to the center line is the inside, and the side away from the center line is the outside.

[0086] Figures 1 to 6 The structure of the firing member 1 and the nail magazine assembly of the embodiment 1 of the present application is shown. Figures 1 to 3As shown, the staple cartridge assembly includes a firing member 1, a staple band 200, a support member 300 supporting the staple band 200, and a staple cartridge cover 100 accommodating the staple band 200 and the support member 300. The staple band 200 includes a staple band body 201 and staples 203. The staples 203 include staple feet 2033, a staple connection portion 2031, and a staple body 2032. The staples 203 are rotatably and detachably connected to the staple band body 201 through the staple connection portion 2031. The upper surface of the staple cartridge cover 100 is provided with staple holes 101. The lateral sides of the staples 203 are restricted between the staple cartridge cover 100 and the support member 300. In order to ensure that the staples 203 can be smoothly rotated and pushed out when driven, a certain lateral gap is respectively provided between the side walls of the staples 203 and the side walls of the staple cartridge cover 100 and the side walls of the support member 300. In an initial state, the firing member 1 is located at the proximal end of the staple cartridge cover 100 and does not act on the staples 203 .

[0087] like Figure 2 and Figure 3 As shown, the firing member 1 includes a main body 12 and at least one nail pushing portion 11, wherein the nail pushing portion 11 is at least partially located at the distal end of the main body 12, and a nail cutting portion 13 is provided on the top of the main body 12. A nail pushing surface 110 is provided on the upper surface of each nail pushing portion 11, and a limiting portion is provided on the nail pushing surface 110. In this embodiment, the limiting portion is a limiting groove 111 provided along the length direction of the nail pushing surface 110. At least one row of the staples 203 is provided in the staple magazine assembly, and the number of the nail pushing portions 11 corresponds to the number of rows of the staples 203, that is, each nail pushing portion 11 corresponds to a row of the staples 203, and is respectively used to push the corresponding row of staples 203 outward when the stapler is fired. Figure 2 The structure in which the firing member 1 is provided with two nail pushing parts 11 is exemplarily shown, and correspondingly, two rows of staples 203 are provided in the staple magazine assembly, but the present application is not limited thereto, and the number of rows of staples 203 can also be one row, three rows, four rows, etc.; the nail pushing surfaces corresponding to the rows of staples can also be provided with the limiting parts on each of the nail pushing surfaces, or any one of them can be provided with the limiting parts, and the present application does not impose any limitation thereto. Figure 3 exemplarily shows an extension direction of a first plane P perpendicular to the axial direction, and the first plane P is a plane parallel to the transverse and longitudinal directions. The projection of the limiting groove 111 in the first plane P at least partially overlaps with the projection of the staple 203 in the first plane P, so the staple 203 is at least partially located on the path of the limiting groove 111 moving from the proximal end to the distal end.

[0088] In an initial state, the firing member 1 is located at the proximal side of the staple cartridge cover 100 and does not act on the staples 203 . When the stapler is fired, the firing member 1 is driven to move in the distal direction, and the staple pushing portion 11 of the firing member 1 first contacts the staple 203 and drives the staple 203 to rotate, and the staple foot 2033 of the staple 203 passes through the staple hole 101 and pierces the tissue. During the rotation of the staple 203, the staple 203 is at least partially located inside the limiting groove 111, and the side wall of the limiting groove 111 abuts against the staple 203. If the staple 203 tends to shift laterally to one side due to tissue resistance, the side wall of the limiting groove 111 can compensate for the lateral deviation of the staple 203, because during the closing and forming process of the staple, the limiting groove 111 limits and guides the staple 203, thereby effectively compensating for the lateral deviation of the staple 203. After the staples 203 are closed and formed, the staple cutting part 13 moves to the staple connecting part 2031 and applies a force to the staple connecting part 2031 to separate the staple connecting part 2031 and the staple belt body 201, so that the staples 203 are separated from the staple belt body 201 and sutured on the tissue. Therefore, the limiting groove 111 prevents the staples 203 from being deflected in the lateral direction when encountering tissue resistance, thereby improving the suturing effect of the staples 203 and effectively improving the surgical effect.

[0089] Figure 4 for Figure 3 The cross-sectional view along the C1-C1 direction is a plane perpendicular to the axial direction, that is, parallel to the first plane. Figure 4 In the cross-sectional view, the cross-sectional profile of the nail body 2032 corresponds to the profile of the second projection M2 of the nail body 2032 in the first plane, and the cross-sectional profile of the limiting groove 111 corresponds to the profile of the first projection M1 of the limiting groove 111 in the first plane. In this embodiment, the width of the second projection M2 is smaller than the width of the first projection M1, and the first side edge 111a of the first projection M1 is located outside the right side edge of the second projection M2, and the second side edge 111b of the first projection M1 is located outside the left side edge of the second projection M2 (here, the outside refers to the side away from the center line S4 of the first projection, and left and right are in Figure 4111). Thus, when the staple pusher 11 drives the staple 203 to rotate, the portion of the staple body 2032 of the staple 203 that abuts against the limiting groove 111 enters the inside of the limiting groove 111 as a whole. If the staple 203 is subject to resistance from the tissue and tends to deviate to the left, the left wall of the limiting groove 111 limits the staple 203 to compensate for the deviation of the staple 203 to the left. If the staple 203 is subject to resistance from the tissue and tends to deviate to the right, the right wall of the limiting groove 111 limits the staple 203 to compensate for the deviation of the staple 203 to the right, so that the staple 203 can be sutured on the tissue without lateral deviation.

[0090] Figure 5 and Figure 6 is a left view of the firing member 1, which shows the projection profile of the firing member 1 in the first plane. Figure 6 As shown, the limiting groove 111 includes a first side wall 1111 and a second side wall 1112 respectively extending along the length direction of the nail pushing surface 110, and the first side wall 1111 and the second side wall 1112 are both arc-shaped. The first side wall 1111 and the second side wall 1112 are respectively symmetrically arranged relative to the center line of the limiting groove 111. Specifically, the first projection of the limiting groove 111 in the first plane extends along the first direction, and its center line direction S4 is parallel to the first direction. In the first projection, the first side wall 1111 and the second side wall 1112 are symmetrically arranged relative to the center line S4 of the limiting groove 111 extending along the first direction, so as to keep the center position of the staple 203 opposite to the center position of the limiting groove 111, so as to provide a uniform limiting and blocking effect on both sides of the staple 203. In other embodiments, the first side wall 1111 and the second side wall 1112 may also be asymmetrically arranged, for example, the curvature of the first side wall 1111 is greater than the curvature of the second side wall 1112, etc., all of which fall within the protection scope of the present application.

[0091] exist Figure 3From the perspective of (corresponding to the plane parallel to the axial direction and the longitudinal direction), the nail pushing surface 110 of the nail pushing portion 11 is generally arc-shaped, and the limiting groove 111 is generally arc-shaped to adapt to the shape of the nail pushing surface 110, so that when the limiting groove 111 is abutted against the staple 203, the limiting groove 111 and the staple 203 are more likely to form surface contact, thereby improving the matching stability of the limiting groove 111 and the overall nail pushing portion 11 and the staple 203. The limiting groove 111 includes a first end at the distal end and a second end at the proximal end, and extends from the first end to the second end along the length direction of the nail pushing surface 110, and the contour trend of the limiting groove 111 is adapted to the trend of the nail pushing surface 110; the distal end and the proximal end are smoothly transitionally connected with the nail pushing surface 110, so that the limiting groove 111 is an inclined groove, and as the firing member 1 moves toward the distal end, the limiting groove 111 sequentially matches with the staple 203 at different positions from the distal end to the proximal end, and the staple 203 is always in smooth contact with the surface of the staple pushing portion 11 at the transition position between the nail pushing surface 110 and the limiting groove 111. The height of the first end of the limiting groove 111 can be selected to be lower than the height of the lowest point of the nail body 2032 of the staple 203, so that when the nail pushing portion 11 abuts against the staple 203, the limiting groove 111 can be matched with the nail body 2032 earlier. However, the present application is not limited thereto, and the height of the first end of the limiting groove 111 may also be higher than the height of the lowest point of the nail body 2032, and during the rotation of the staple 203, the nail body 2032 cooperates with the limiting groove 111. The length of the limiting groove 111 may be substantially the same as the length of the nail pushing surface 110, or may be shorter than the nail pushing surface 110, for example, only a small section of the limiting groove is provided at the distal end of the nail pushing surface 110, or only a small section of the limiting groove is provided at the proximal end of the nail pushing surface 110 near the nail cutting portion 13, or only a small section of the limiting groove is provided at the center of the nail pushing surface 110, or a section of the limiting groove is provided between the distal end and the middle position of the nail pushing surface 110, etc., all of which are within the protection scope of the present application.

[0092] Understandably, Figures 1 to 6 In the first embodiment shown, the nail pushing surface 110 may also be provided with at least one limiting groove 111 arranged in sections. Take two limiting grooves as an example, namely, a first position limiting groove located at the proximal end, and a second position limiting groove located at the distal end of the first position limiting groove. The structure of the two limiting grooves may adopt the structure of the limiting groove 111 of the first embodiment, but the present application is not limited thereto.

[0093] Figure 7 and Figure 8The structure of the firing member 2 of Example 2 of the present application is shown. In Example 2, the firing member 2 includes a nail pushing portion and a body portion, the nail pushing portion is at least partially located at the distal end side of the body portion, the upper surface of the nail pushing portion is provided with a nail pushing surface, and the nail pushing surface is provided with a limiting portion. In this embodiment, the nail pushing portion includes a first nail pushing portion 211 and a second nail pushing portion 221, and the body portion includes a first body portion 212 and a second body portion 222. The first nail pushing portion 211 and the first body portion 212 are integrally arranged, and the second nail pushing portion 221 and the second body portion 222 are integrally arranged. A first assembly portion 2121 is provided at the proximal side of the first body portion 212, and a nail cutting portion 223 is provided at the top of the second body portion 222, and the nail cutting portion 223 is integrally arranged with the second body portion 222, and the first nail pushing portion 211 and the second nail pushing portion 221 are both located at the distal end side of the nail cutting portion 223. The distal side of the second body portion 222 is provided with a second assembly portion 2221, and the first assembly portion 2121 and the second assembly portion 2221 are embedded and connected so that the first body portion 212 is installed on the distal side of the second body portion 222, and the first nail-pushing portion 211 is located on the inner side of the second nail-pushing portion 221 (the inner side here refers to the side closer to the axis of the nail magazine assembly). In this embodiment, the first assembly portion 2121 is a protrusion and the second assembly portion 2221 is a hole, but the present application is not limited to this, and the first assembly portion can also be a hole and the second assembly portion is a protrusion. The first assembly portion and the second assembly portion are also not limited to front-to-back connection, and can also be connected up and down, for example, the first assembly portion is a protrusion extending downward, and the second assembly portion is a hole for accommodating the protrusion, or the second assembly portion is a protrusion extending upward, and the first assembly portion is a hole for accommodating the protrusion, etc. Therefore, the firing member 2 in this embodiment is composed of a first component 21 (including a first nail pushing portion 211 and a first main body portion 212) and a second component 22 (including a second nail pushing portion 221 and a second main body portion 222) which are independent of each other and connected to each other.

[0094] In this embodiment, the firing member 2 is provided with four nail pushing parts: two first nail pushing parts 211 and two second nail pushing parts 221. Correspondingly, four rows of staples are provided in the staple magazine assembly. The present application does not limit the number of nail pushing parts. The number of nail pushing parts provided on the first component 21 and the number of nail pushing parts provided on the second component 22 can be reduced or increased as needed, and alternatively, the first nail pushing part 211 can also be provided on the outside of the second nail pushing part 221, which also falls within the protection scope of the present application. The upper surface of the first nail pushing part 211 is provided with a first nail pushing surface, and the first nail pushing surface is provided with a first limiting part. The upper surface of the second nail pushing part 221 is provided with a second nail pushing surface, and the second nail pushing surface is provided with a second limiting part. In this embodiment, the first limiting portion is a first limiting groove 2111 extending along the length direction of the first nail pushing surface, the first limiting groove 2111 includes a first end and a second end, the second end is located at the proximal side of the first end, and from the first end to the second end of the first limiting groove 2111, the first limiting groove 2111 extends along the length direction of the first nail pushing surface, and the contour trend of the first limiting groove 2111 is adapted to the trend of the first nail pushing surface. Transition sections are respectively provided between the first end and the second end of the first limiting groove 2111 and the first nail pushing surface, so that the first end and the second end are both smoothly transitionally connected to the first nail pushing surface. The second limiting portion is a second limiting groove 2211 extending along the length direction of the second nail pushing surface, the second limiting groove 2211 includes a first end and a second end, the second end is located at the proximal side of the first end, and from the first end to the second end of the second limiting groove 2211, the second limiting groove 2211 extends along the length direction of the second nail pushing surface, and the contour trend of the second limiting groove 2211 is adapted to the trend of the second nail pushing surface. Transition sections are respectively provided between the first end and the second end of the second limiting groove 2211 and the second nail pushing surface, so that the first end and the second end are both smoothly transitionally connected to the second nail pushing surface. During the firing process of the stapler, when the firing member 2 moves in the distal direction, the first nail-pushing portion 211 of the firing member 2 drives the two rows of staples on the inner side of the staple magazine assembly (the side close to the axis of the staple magazine assembly) to rotate, and the first limiting groove 2111 guides and limits the two rows of staples on the inner side to compensate for the lateral offset of the inner staples, while the second nail-pushing portion 221 of the firing member 2 drives the two rows of staples on the outer side of the staple magazine assembly (the side away from the axis of the staple magazine assembly) to rotate, and the second limiting groove 2211 guides and limits the two rows of staples on the outer side to compensate for the lateral offset of the outer staples. The shapes of the first limiting groove 2111 and the second limiting groove 2211 can be the same as the shape of the limiting groove 111 in Example 1, but the present application is not limited thereto.

[0095] Figures 9 to 12The structure of the firing member 3 of the third embodiment of the present application is shown. In the third embodiment, the firing member 3 includes a nail pushing portion 311, a main body portion and a nail cutting portion 331. The nail pushing portion 311 is at least partially located at the distal end of the main body portion. The upper surface of the nail pushing portion 311 is provided with a nail pushing surface, and the nail pushing surface is provided with a limiting portion. The nail pushing portion 311 is provided at the distal end of the nail cutting portion 331. The main body portion includes a first main body portion 312, a second main body portion 322 and a third main body portion 332. The first main body portion 312 is integrally provided with the first nail pushing portion 311, and the nail cutting portion 331 is integrally provided with the third main body portion 332, and the nail cutting portion 331 is located at the top end of the third main body portion 332. Each of the nail cutting portions 331 corresponds to a row of staples. A first assembly portion 313 is provided at the proximal side of the first body portion 312, a second assembly portion 323 is provided at the distal side of the second body portion 322, the second body portion 322 is further provided with a third assembly portion 324, and the third body portion 332 is provided with a fourth assembly portion 334. The first assembly portion 313 and the second assembly portion 323 are embedded and connected so that the first body portion 312 is mounted on the distal side of the second body portion 322. The third assembly portion 324 and the fourth assembly portion 334 are embedded and connected so that the third body portion 332 is mounted on the second body portion 322. In this embodiment, the first assembly portion 313 is a hole, the second assembly portion 323 is a protrusion, and the second assembly portion 323 is embedded in the first assembly portion 313. The third assembly portion 324 is a convex column, the fourth assembly portion 334 is a hole, and the third assembly portion 324 is embedded in the fourth assembly portion 334. The structures of the first assembly part 313, the second assembly part 323, the third assembly part 324 and the fourth assembly part 334 in this embodiment are only examples and are not intended to limit the scope of protection of this application. Other structures that can achieve the connection between the first body part 312, the second body part 322 and the third body part 332 are within the scope of protection of this application. Therefore, in this embodiment, the firing member 3 is composed of a first component 31 (including a nail pushing part 311 and a first body part 312), a second component 32 (including a second body part 322) and a third component 33 (including a nail cutting part 331 and a third body part 332) that are independent of each other and connected to each other.

[0096] In Embodiment 3, the firing member 3 includes four nail-pushing portions 311, and the nail magazine assembly is provided with four rows of staples. The limiting portion is a limiting groove 3111 extending along the length direction of the nail-pushing surface, so that during the firing process of the stapler, the limiting groove 3111 can be used to guide and limit the abutting staples in the lateral direction to compensate for the lateral deviation of the staples. Fig.12As shown, in Example 3, in the first projection of the limiting groove 3111 in the first plane, the surface of the limiting groove 3111 as a whole is an arc surface symmetrical with respect to the center line S4, and the structure of the limiting groove 3111 can also be applied to the limiting groove 111 in Example 1, and can also be applied to the first limiting groove 2111 and the second limiting groove 2211 in Example 2, or the structure of the limiting groove 3111 in Example 3 can also be replaced by the structure of the limiting groove 111 in Example 1.

[0097] Fig.13 and Fig.14The structure of the firing member 3 of Example 4 of the present application is shown. In Example 4, the firing member 3 includes a nail pushing portion, a main body portion and a nail cutting portion 331, each of the nail cutting portions 331 corresponds to a row of staples, the nail pushing portion is at least partially located at the distal end of the main body portion, the upper surface of the nail pushing portion is a nail pushing surface, and the nail pushing surface is provided with a limiting portion. The nail pushing portion includes a first nail pushing portion 311 and a second nail pushing portion 321, both of which are located at the distal end of the nail cutting portion 331, and the main body portion includes a first main body portion 312, a second main body portion 322 and a third main body portion 332. The first nail pushing portion 311 and the first main body portion 312 are integrally arranged, the second nail pushing portion 321 and the second main body portion 322 are integrally arranged, and the nail cutting portion 331 and the third main body portion 332 are integrally arranged. The first assembly portion 313 is provided at the proximal side of the first body portion 312, the second assembly portion 323 is provided at the distal side of the second body portion 322, and the second body portion 322 is further provided with a third assembly portion 324. The first assembly portion 313 and the second assembly portion 323 are embedded and connected so that the first body portion 312 is installed on the distal side of the second body portion 322. The first nail-pushing portion 311 is located on the inner side of the second nail-pushing portion 321 (the side close to the axis of the nail magazine assembly). The third assembly portion 324 is embedded and connected with the fourth assembly portion 334 so that the third body portion 332 is installed on the second body portion 322. In this embodiment, the first assembly portion 313 is a convex column extending downward, the second assembly portion 323 is a hole, and the first assembly portion 313 is embedded in the second assembly portion 323. The third assembly portion 324 is a convex column, the fourth assembly portion 334 is a hole, and the third assembly portion 324 is embedded in the fourth assembly portion 334. The structures of the first assembly part 313, the second assembly part 323, the third assembly part 324 and the fourth assembly part 334 in this embodiment are only examples and are not intended to limit the protection scope of this application. Other structures that can achieve the connection between the first body part 312, the second body part 322 and the third body part 332 are within the protection scope of this application. Therefore, in this embodiment, the firing member 3 is composed of a first component 31 (including a first nail pushing part 311 and a first body part 312), a second component 32 (including a second nail pushing part 321 and a second body part 322) and a third component 33 (including a nail cutting part 331 and a third body part 332) that are independent of each other and connected to each other.

[0098] In this embodiment, the firing member 3 is provided with four nail-pushing parts 311: two first nail-pushing parts 311 and two second nail-pushing parts 321. Correspondingly, four rows of staples are provided in the staple cartridge assembly. The upper surface of the first nail-pushing part 311 is a first nail-pushing surface, and the first nail-pushing surface is provided with a first limiting part. The upper surface of the second nail-pushing part 321 is a second nail-pushing surface, and the second nail-pushing surface is provided with a second limiting part. In this embodiment, the first limiting part is a first limiting groove 3111, and the second limiting part is a second limiting groove 3211. During the firing process of the stapler, when the firing member 3 moves in the distal direction, the first nail pushing portion 311 of the firing member 3 drives the two rows of staples on the inner side of the staple magazine assembly to rotate, and the first limiting groove 3111 guides and limits the two inner rows of staples to compensate for the lateral deviation of the inner staples, while the second nail pushing portion 321 of the firing member 3 drives the two rows of staples on the outer side of the staple magazine assembly to rotate, and the second limiting groove 3211 guides and limits the two outer rows of staples to compensate for the lateral deviation of the outer staples.

[0099] Figures 15 to 17 The structure of the firing member 4 of the fifth embodiment of the present application is shown. In the fifth embodiment, the firing member 4 includes a nail pushing portion 41, a main body portion 42 and a nail cutting portion 43, wherein the nail cutting portion 43 is located at the top of the main body portion 42, and the nail pushing portion 41 is at least partially located at the distal end side of the main body portion 42 and at the distal end side of the nail cutting portion 43. The upper surface of the nail pushing portion 41 is provided with a nail pushing surface 410, and the nail pushing surface 410 is provided with a plurality of spaced limiting portions 411. The plurality of limiting portions 411 are arranged along the length direction of the nail pushing surface 410 of the nail pushing portion 41. Furthermore, the limiting portion 411 is a protruding portion protruding toward the distal direction, and the surface of each limiting portion 411 is provided with a limiting groove 412 recessed toward the proximal direction. Therefore, in this embodiment, a limiting portion divided into multiple sections is adopted, and when the staples are rotated to different angles, the limiting grooves 412 at different positions abut against the staples and guide and limit the staples. The plurality of limiting portions 411 may be arranged evenly or unevenly, and the length and position of the limiting portion 411 are designed according to the specific position of the staple. For example, in one embodiment, by pre-simulating and analyzing the rotation process of the firing member 4 driving the staple, it is determined that the contact position between the staple pusher 41 and the staple when the staple may encounter relatively large resistance, and a limiting groove 412 is provided at the contact position, so as to better meet the use requirements of the actual application scenario.

[0100] Fig.18FIG. 5 shows a partial structure of a firing member 5a of Example 6 of the present application. In Example 6, the upper surface of the nail-pushing portion 51a of the firing member 5a is provided with a nail-pushing surface, and the nail-pushing surface is provided with a limiting portion, which is a limiting groove 511a. In the first projection of the limiting groove 511a in the first plane, the side wall of the limiting groove 511a is not symmetrically arranged relative to the center line S4, but is an arc deviated to the right (here the left and right sides are in the Fig.18 The limiting groove 511a can be applied to the scene where it is important to prevent the staple from shifting to the right. When the staple tends to shift to the right, the side wall of the limiting groove 511a provides the staple with a force to compensate for its lateral shift, thereby preventing the staple from shifting to the right.

[0101] Fig.19 FIG. 5 shows a partial structure of a firing member 5b of Example 7 of the present application. In Example 7, the upper surface of the nail-pushing portion 51b of the firing member 5b is provided with a nail-pushing surface, and the nail-pushing surface is provided with a limiting portion, which is a limiting groove 511b. In the first projection of the limiting groove 511b on the first plane, the side wall of the limiting groove 511b is not symmetrically arranged relative to the center line S4, but is an arc biased to the left (the left and right sides are in the left side). Fig.19 The limiting groove 511b can be applied to the scene where it is important to prevent the staple from deviating to the left. When the staple tends to deviate to the left, the side wall of the limiting groove 511b provides the staple with a force to compensate for its lateral deviation, thereby preventing the staple from deviating to the left.

[0102] Fig. 20 The partial structure of the firing member 5c of Example 8 of the present application is shown. In Example 8, the upper surface of the nail pushing portion 51c of the firing member 5c is provided with a nail pushing surface, and the nail pushing surface is provided with a limiting portion, which is a limiting groove 511c. In the first projection of the limiting groove 511c in the first plane, the first side wall and the second side wall of the limiting groove 511c are not arc surfaces, but inclined planes, which can also provide a force to compensate for the lateral displacement of the staples when the staples have a tendency to deviate in the corresponding direction.

[0103] The structure of any one of the limiting grooves in the above embodiments 6 to 8 can replace the structure of any one of the limiting grooves in the above embodiments 1 to 5 to form a new implementation, which also falls within the protection scope of this application. Further, for the same firing member, limiting grooves of different shapes can also be set at different positions, for example, a limiting groove of different shapes can be set at the left nail pushing part. Fig.19 The limiting groove 51b shown in the figure is provided on the right side of the push nail portion. Fig.18 The limiting groove 51a shown, etc., all fall within the protection scope of this application.

[0104] Fig.21 The partial structure of the firing member 6 of the embodiment 9 of the present application is shown. Fig. 22 The partial structure of the firing member 6 of the embodiment 10 of the present application is shown. In the embodiments 9 and 10, the upper surface of the nail pushing portion 61 of the firing member 6 is provided with a nail pushing surface 610, and the nail pushing surface 610 is provided with a limiting portion, and the limiting portion includes a limiting convex portion 62 protruding toward the distal end, and the limiting convex portion 62 is arranged along the length direction of the nail pushing surface 610. When the firing member 6 moves until the nail pushing portion 61 abuts against the staple, the limiting convex portion 62 is at least partially located on the outer side of the corresponding staple and / or the inner side of the staple (here, the outer side and the inner side of the staple are relative to the axis of the staple cartridge assembly, the side away from the axis of the staple cartridge assembly is the outer side, and the side close to the axis of the staple cartridge assembly is the inner side) to compensate for the lateral displacement of the staple to the outer side and / or the inner side. Specifically, when it is necessary to simultaneously compensate for the lateral displacement of the staple toward the outside and toward the inside, the limiting protrusion 62 is at least partially located at the outside and inside of the corresponding staple. That is, the projection of the limiting protrusion 62 on the first plane has a portion located outside the second projection of the staple on the first plane, which is used to compensate for the lateral displacement of the staple toward the outside, and the projection of the limiting protrusion 62 on the first plane has a portion located inside the second projection of the staple on the first plane, which is used to compensate for the lateral displacement of the staple toward the inside. When it is only necessary to compensate for the lateral displacement of the staple toward the outside, the projection of the limiting protrusion 62 on the first plane is at least partially located outside the second projection of the staple on the first plane. When it is only necessary to compensate for the lateral displacement of the staple toward the inside, the projection of the limiting protrusion 62 on the first plane is at least partially located inside the second projection of the staple on the first plane.

[0105] Fig.21 and Fig. 22 Two different structures of the limiting protrusion 62 are shown. Fig.21 As shown, in Example 9, the limiting protrusion 62 includes two limiting protrusions respectively arranged on both sides of the staple pushing surface 610, and the projection of the left limiting protrusion on the first plane is at least partially located on the inner side of the second projection of the staple on the first plane, and the projection of the right limiting protrusion on the first plane is at least partially located on the outer side of the second projection of the staple on the first plane. Therefore, the limiting protrusion 62 can effectively prevent the staple from lateral displacement to the outside and inside. In other alternative embodiments, only one limiting protrusion can be provided to achieve compensation in one direction, or a left limiting protrusion can be provided on the left staple pushing portion, and a right limiting protrusion can be provided on the right staple pushing portion. Fig. 22As shown, in embodiment 10, the limiting protrusion 62 includes a protrusion provided on the right side of the staple pushing surface 610, and the surface of the protrusion is provided with an inclined guide surface 621. The projection of the limiting protrusion 62 on the first plane is at least partially located outside the second projection of the staple on the first plane, which can effectively compensate for the lateral deviation of the staple to the outside. Fig.10 The limiting protrusion 62 may also be arranged on the left side of the center line S4, or a limiting protrusion 62 may be arranged on the left and right sides of the center line S4, which also falls within the protection scope of the present application.

[0106] The length of the limiting protrusion 62 in the above embodiment 9 and embodiment 10 can be set as needed, and can be basically equal to the length of the nail pushing surface, or shorter than the length of the nail pushing surface. Any of the limiting protrusions in the above embodiment 9 and embodiment 10 can replace the structure of the limiting groove in any of the above embodiments 1 to 5 to form a new implementation method. Or any of the limiting protrusions 62 in the above embodiment 9 and embodiment 10 can also be used in combination with the limiting groove. For example, on the same firing member, according to the needs of use, part of the nail pushing part is provided with a limiting protrusion, and part of the nail pushing part is provided with a limiting groove. The above various deformations all fall within the protection scope of this application.

[0107] Fig.23 The structure of the firing member 7 of embodiment 11 of the present application is shown. In this embodiment, the firing member 7 includes a nail pushing portion 71, a main body portion 72 and a nail cutting portion 73, and the nail pushing portion 71 is located at the distal end of the nail cutting portion 73. A nail pushing surface 710 is provided on the upper surface of the nail pushing portion 71. The nail pushing surface 710 of the outer nail pushing portion 71 is provided with a limiting portion, while the nail pushing surface 710 of the inner nail pushing portion 71 is not provided with a limiting portion, and is an overall smooth surface. Two sections of limiting portions are provided on the nail pushing surface 710 of the outer nail pushing portion 71: a first position limiting groove 711 and a second position limiting groove 712. The first position limiting groove 711 is located at the distal end of the nail pushing surface 710, and the second position limiting groove 712 is located at the proximal end of the nail pushing surface 710, that is, located at a position of the nail pushing surface 710 close to the nail cutting portion 73. The first position limiting groove 711 can cooperate with the staple body when the staple pushing portion 71 just abuts against the outer staples to compensate for the lateral deviation of the outer staples, and the second position limiting groove 712 can cooperate with the staple body when the outer staples are basically closed and pushed outward to compensate for the lateral deviation of the outer staples. In another alternative embodiment, the staple pushing surface 710 of the inner staple pushing portion 711 can also be provided with the first position limiting groove 711 and the second position limiting groove 712, or other limiting portion structures can be provided, all of which belong to the protection scope of this application.

[0108] like Fig.23As shown, in this embodiment, the first position limiting groove 711 and the second position limiting groove 712 both extend along the length direction of the nail pushing surface 710, and the contour trends of the first position limiting groove 711 and the second position limiting groove 712 are adapted to the trend of the nail pushing surface 710, the first end and the second end of the first position limiting groove 711 are both smoothly transitionally connected to the nail pushing surface 710, and the first end and the second end of the second position limiting groove 712 are both smoothly transitionally connected to the nail pushing surface 710, thereby realizing a smooth transition in which each position of the overall nail pushing portion 71 cooperates with the staples in turn.

[0109] Fig.24 The structure of the firing member 7 of Example 12 of the present application is shown. The difference between this embodiment and Example 11 is that the outer nail pushing surface 710 is further provided with a third position limiting groove 713, and the third position limiting groove 713 is located at the center position of the nail pushing surface 710 in the horizontal direction. During the rotation of the staples, the third position limiting groove 713 cooperates with the staple body and effectively compensates for the lateral deviation of the staples during the rotation of the outer staples. Optionally, the inner nail pushing surface 710 can also be provided with the first position limiting groove 711, the second position limiting groove 712 and the third position limiting groove 713 at the same time to compensate for the lateral deviation of the inner staples. In alternative embodiments, different deformations can be made as needed. For example, on the nail pushing surface 710 of one or more nail pushing parts 71, only the first position limit groove 711 can be set, or only the second position limit groove 712 can be set, or only the third position limit groove 713 can be set, or only the first position limit groove 711 and the third position limit groove 713 can be set, or only the second position limit groove 712 and the third position limit groove 713 can be set, or the first position limit groove 711 and the second position limit groove 712 can be connected, or the second position limit groove 712 and the third position limit groove 713 can be connected, etc., all of which fall within the protection scope of the present application.

[0110] The above embodiments only exemplarily show several optional implementations of the firing member, but the present application is not limited to the structures described in the above embodiments, and other deformations and extensions, or combinations between the embodiments may also be performed. When the firing member is provided with multiple nail pushing parts, the nail pushing surface of each nail pushing part may be provided with a limiting part, or only the nail pushing surfaces of some nail pushing parts may be provided with a limiting part. When the nail pushing surfaces of multiple nail pushing parts are provided with limiting parts, the limiting part structures of different nail pushing parts may be the same or different. For example, on the same firing member, the limiting part on one or several nail pushing parts may adopt the limiting part structure of one of the above embodiments, and other nail pushing parts may adopt the limiting structure of another embodiment. The number, position, length, shape, depth / height, etc. of the limiting parts of different nail pushing parts may be the same or different, and may be adjusted as needed, and all belong to the protection scope of the present application.

[0111] The above embodiments 9 and 10 can also be modified to set multiple sections of limiting convex parts. For example, multiple sections of limiting convex parts are set on the nail pushing surface of at least one nail pushing part, and the multiple sections of limiting convex parts are arranged along the length direction of the nail pushing surface. For example, a limiting convex part is set at one or more of the proximal position, distal position, and center position of the nail pushing surface, or one or more sections of limiting convex parts are set at other positions where the lateral displacement of the staples needs to be compensated, etc., all of which belong to the protection scope of the present application.

[0112] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A firing member, characterized in that: A stapler assembly for a surgical stapler and can be driven to move along the axial direction of the surgical stapler, wherein the stapler assembly is provided with at least one row of staples arranged along the axial direction; the firing member comprises a main body and at least one staple pushing portion, wherein the staple pushing portion is at least partially located at the distal end of the main body, and a staple pushing surface is provided on the upper surface of the staple pushing portion, and the staple pushing surface is provided with at least one section of a limiting portion; Wherein, each of the staple pushing portions corresponds to a row of staples, and when the firing member moves in the distal direction to drive the staples, the limiting portion at least partially acts on the staples so that the limiting portion compensates for the lateral displacement of the staples.

2. The firing member according to claim 1, characterized in that: The limiting portion is a limiting groove arranged along the length direction of the nail pushing surface.

3. The firing member according to claim 2, characterized in that: The stapler comprises a staple body, the limiting groove has a first projection in a first plane perpendicular to the axial direction, the staple body has a second projection in the first plane, and both sides of the first projection are respectively located outside both sides of the second projection.

4. The firing member according to claim 2, characterized in that: The limiting groove comprises a first side wall and a second side wall respectively extending along the length direction of the nail pushing surface, and the first side wall and the second side wall are symmetrically arranged relative to the center line of the limiting groove.

5. The firing member according to claim 1, characterized in that: The limiting portion includes a first end and a second end, the second end is located on the proximal side of the first end, and the limiting portion extends from the first end to the second end along the length direction of the nail pushing surface, and the contour trend of the limiting portion is adapted to the trend of the nail pushing surface; the first end and the second end are smoothly transitionally connected to the nail pushing surface.

6. The firing member according to claim 2, characterized in that: The limiting groove is in an arc shape as a whole to adapt to the shape of the nail pushing surface.

7. The firing member according to claim 1, characterized in that: The main body portion includes a first main body portion and a second main body portion, the nail pushing portion is fixedly connected to the first main body portion, and the first main body portion is installed on the distal end side of the second main body portion.

8. The firing member according to claim 1, characterized in that: The nail pushing portion includes a first nail pushing portion and a second nail pushing portion, and the main body portion includes a first main body portion and a second main body portion, the first nail pushing portion and the first main body portion are fixedly connected, the second nail pushing portion and the second main body portion are fixedly connected, the first main body portion is installed on the distal side of the second main body portion, and the first nail pushing portion is located on the inner side of the second nail pushing portion.

9. The firing member according to claim 1, characterized in that: It comprises at least two spaced apart limiting portions, and the limiting portions are arranged along the length direction of the nail pushing surface.

10. The firing member according to claim 9, characterized in that: The limiting portion is a protruding portion, and a limiting groove is provided on the surface of each limiting portion.

11. The firing member according to claim 1, characterized in that: The limiting portion includes a limiting protrusion arranged along the length direction of the nail pushing surface. When the firing member moves until the nail pushing portion abuts against the staple, the limiting protrusion is at least partially located on the outside of the corresponding staple and / or the inside of the staple to compensate for the lateral deviation of the staple to the outside and / or the inside.

12. A staple cartridge assembly, characterized in that: A firing member comprising the firing member according to any one of claims 1 to 11.

13. A surgical stapler, characterized in that: Includes the nail magazine assembly described in claim 12.

Images