Percussion structure, nail bin assembly and surgical anastomat

Abstract

The utility model provides a percussion structure, a nail bin assembly and a surgical anastomat, the percussion structure 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, the percussion structure comprises a base part and a nail pushing part arranged on the base part, and the nail pushing part comprises a driving part and an elastic part; the driving part is at least partially located on the far end side of the elastic part, when the elastic part is in the initial state, the highest point of the elastic part is not higher than the highest point of the nail bin body, and the elastic part is configured to elastically deform and reduce the height when being driven to move in the far end direction. By the adoption of the percussion structure, when the anastomat is percussed, the anastomosis nail can be assisted to be better formed in a closed mode and separated from the nail hole.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a firing structure, 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 staples are closed and formed under the action of the anvil. However, in actual use, the staples may not be completely closed, resulting in poor suturing effect on the tissue, seriously affecting the surgical effect. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of the present application is to provide a firing structure, a stapler assembly and a surgical stapler, which can assist the staples in better closing and forming when the stapler is fired.

[0005] An embodiment of the present application provides a firing structure, which is used for a stapler magazine assembly of a surgical stapler and can be driven to move along the axial direction of the surgical stapler. The stapler magazine assembly includes a stapler magazine body, and the firing structure includes a base and a staple pushing portion provided on the base, the staple pushing portion includes a driving portion and an elastic portion, and the driving portion is at least partially located on the distal side of the elastic portion. When the elastic portion is in an initial state, the height of the highest point of the elastic portion is not higher than the height of the highest point of the stapler magazine body, and the elastic portion is configured to undergo elastic deformation and reduce its height when driven to move in the distal direction.

[0006] In some embodiments, the staple cartridge assembly further comprises at least one staple, the staple being rotatably connected to the staple cartridge body via a staple connecting portion, the staple being aligned along an axial direction, and the staple being aligned with the staple pushing portion in an axial direction;

[0007] The firing structure is driven to move in the distal direction so that the elastic part is abutted against the at least one staple. After the elastic part is elastically deformed by the abutting force of the staple, the height of the highest point of the elastic part is lower than or equal to the height of the lowest point of the staple connecting part. After the firing structure continues to move in the distal direction and disengages from the staple, the elastic part returns to its initial state.

[0008] In some embodiments, when the elastic portion is in an initial state, a height of a highest point of the elastic portion is higher than a height of a highest point of the driving portion.

[0009] In some embodiments, the firing structure is provided with a clearance space on the proximal side of the elastic part, so that the elastic part can enter the clearance space after deformation. In some embodiments, the base is further provided with a nail cutting part, which is located on the proximal side of the nail pushing part, and after the elastic part is elastically deformed, the highest point height of the elastic part is lower than or equal to the highest point height of the nail cutting part.

[0010] In some embodiments, the elastic portion is an elastic member, and the elastic member is mounted on the base.

[0011] In some embodiments, the base is provided with a mounting groove, the driving portion is at least partially located on the distal side of the mounting groove, the elastic member includes a protrusion and a mounting portion, the mounting portion is embedded in the mounting groove, and the protrusion at least partially protrudes above the mounting groove.

[0012] In some embodiments, the base is provided with a first abutting portion and a second abutting portion located on the proximal side of the driving portion, and the elastic member includes a first mounting portion, a protrusion and a second mounting portion which are arranged in sequence, the first mounting portion and the second mounting portion are provided on the base and respectively abut against the first abutting portion and the second abutting portion, and a yield groove is provided at a position of the base opposite to the protrusion.

[0013] In some embodiments, the elastic portion is integrally formed with the driving portion and / or the base.

[0014] In some embodiments, the elastic portion includes a fixed end, a protruding portion, and a free end that are sequentially arranged, the fixed end of the elastic portion is fixed to the driving portion, and the free end of the elastic portion extends toward the proximal direction relative to the fixed end.

[0015] In some embodiments, the nail pushing portion includes a first nail pushing portion and a second nail pushing portion, the second nail pushing portion is arranged on the distal side of the base, the first nail pushing portion is connected to the base through a first assembly portion, and the second nail pushing portion is located on the outside of the first nail pushing portion.

[0016] In some embodiments, the nail pushing portion is provided with a first assembly portion, and the base is provided with a second assembly portion, and the first assembly portion is connected to the second assembly portion so that the nail pushing portion is fixed to the base.

[0017] In some embodiments, the base is provided with a third assembly portion and a first limiting structure, the nail cutting portion is provided with a fourth assembly portion and a second limiting structure, the fourth assembly portion is connected to the third assembly portion to fix the nail cutting portion to the base, the nail cutting portion is at least partially located on the proximal side of the nail pushing portion, and the first limiting structure and the second limiting structure are interlocked to block the lateral movement of the nail cutting portion relative to the base.

[0018] A second aspect of the present application also provides a nail magazine assembly, including the firing structure.

[0019] The third aspect of the present application also provides a surgical stapler, comprising the above-mentioned staple magazine assembly.

[0020] The firing structure, staple cartridge assembly and surgical stapler provided by the present application have the following advantages:

[0021] The present application provides a firing structure for a stapler assembly of a surgical stapler. When the stapler is fired, the firing structure moves from the proximal end to the distal end of the stapler assembly. The driving part first abuts against the staples and drives the staples to rotate and gradually close under the action of the staple anvil. Then the elastic part abuts against the staples. The elastic part can assist the staples to be better closed and formed. Under the abutting force of the staples, the elastic part will be elastically deformed and avoid other parts in the stapler assembly, so that it can continue to move in the distal direction more smoothly without affecting the normal firing of the stapler. In addition, since the highest point height of the elastic part is not higher than the highest point height of the stapler body, the elastic part will not interfere with other parts in the stapler assembly during axial movement. Therefore, the firing structure can further ensure that the staples can be completely closed and formed and smoothly detached from the nail holes when the stapler is fired without affecting the firing smoothness of the stapler. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 is a structural schematic diagram of a nail magazine assembly of Example 1 of the present application;

[0024] Figure 2 is a structural schematic diagram of the nail magazine assembly after the nail magazine cover is removed according to Example 1 of the present application;

[0025] Figure 3 is a schematic diagram of the cooperation between the firing structure and the nail belt of Example 1 of the present application;

[0026] FIG4( a ) is a front view of the firing structure and the nail belt of Example 1 of the present application;

[0027] FIG4( b ) is a left side view of the firing structure and the nail belt of Example 1 of the present application;

[0028] Figure 5 is a schematic diagram of a firing structure of Example 2 of the present application;

[0029] Figure 6 is a front view of the firing structure of Example 2 of the present application;

[0030] Figure 7 is a front view of the firing structure of Example 3 of the present application;

[0031] Figure 8 is a schematic diagram of a firing structure of Example 4 of the present application;

[0032] Fig. 9 is a front view of the firing structure of Example 4 of the present application;

[0033] Fig.10 is a schematic structural diagram of a firing structure of Example 5 of the present application;

[0034] Fig.11 is a structural schematic diagram of the firing structure of Example 6 of the present application;

[0035] Fig.12 is a schematic diagram of the cooperation between the firing structure and the nail belt of Example 6 of the present application;

[0036] Fig.13 is a structural schematic diagram of a firing structure of Example 7 of the present application;

[0037] Fig.14 is an exploded view of the firing structure of Example 7 of the present application;

[0038] Fig.15 is a structural schematic diagram of a firing structure of Example 8 of the present application;

[0039] Fig.16 is an exploded view of the firing structure of Example 8 of the present application;

[0040] Fig.17 is a structural schematic diagram of a firing structure of Example 9 of the present application;

[0041] Fig.18 and Fig.19 is an exploded view of the firing structure of Example 9 of the present application;

[0042] Fig. 20 and Fig.21It is an exploded view of the firing structure of embodiment 10 of the present application.

[0043] Reference numerals:

[0044] 1 Firing structure (Examples 1-4) 331 Second assembly part

[0045] 11 Nail Pushing Unit 4 Firing Structure (Example 8)

[0046] 111 driving unit 41 nail pushing unit

[0047] 112 elastic part 411 driving part

[0048] 1121 mounting portion 412 elastic portion

[0049] 11211 first mounting portion 413 first assembly portion

[0050] 11212 Second mounting portion 42 Nail cutting portion

[0051] 1122 protrusion 43 base

[0052] 1123 free end 431 second assembly part

[0053] 12 Nail cutting part 5 firing structure (Examples 9 and 10)

[0054] 13 base 51a first nail pushing portion

[0055] 131 Installation groove 511a First driving part

[0056] 132 clearance groove 512a first elastic portion

[0057] 133 First abutting portion 513a First assembly portion

[0058] 134 Second abutting portion 514a Third assembly portion

[0059] 2 Firing structure (Examples 5 and 6) 51b Second nail pushing part

[0060] 21 nail pushing part 511b second driving part

[0061] 211 driving part 512b second elastic part

[0062] 212 elastic part 52 nail cutting part

[0063] 2121Fixed end 521 Sixth assembly part

[0064] 2122 protrusion 522 second limiting structure

[0065] 2123 free end 523 support part

[0066] 2124 limiter 53 base

[0067] 22 nail cutting part 533 second assembly part

[0068] 23 base 534 fourth assembly part

[0069] 231 Make way for 535 Fifth Assembly Department

[0070] 3 Firing structure (Example 7) 536 First limit structure

[0071] 31a First nail pushing unit 100 Nail cartridge cover

[0072] 311a First driving unit 101 Positioning unit

[0073] 312a The first elastic part 200 has a nail band

[0074] 313a First assembly part 201 Nail belt body

[0075] 31b Second staple pusher 203 Staple

[0076] 311b Second driving part 2031 Nail connecting part

[0077] 312b Second elastic portion 2032 Nail foot

[0078] 32 nail cutting part 300 support member

[0079] 33 base DETAILED DESCRIPTION

[0080] 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.

[0081] An embodiment of the present application provides a firing structure, a stapler assembly including the firing structure, and a surgical stapler including the stapler assembly. The stapler assembly includes a stapler body. The firing structure can be driven to move along the axial direction of the surgical stapler. The firing structure includes a base and a stapler pushing portion provided on the base, the stapler pushing portion includes a driving portion and an elastic portion, the driving portion is at least partially located on the distal side of the elastic portion, when the elastic portion is in an initial state, the height of the highest point of the elastic portion is not higher than the height of the highest point of the stapler body, and the elastic portion is configured such that when driven to move in the distal direction, the elastic portion undergoes elastic deformation and its height is reduced.

[0082] By adopting this firing structure, when the stapler is fired, the firing structure moves from the proximal end to the distal end of the stapler assembly, the driving part first abuts against the staples, and drives the staples to rotate and gradually close under the action of the anvil, and then the elastic part abuts against the staples, the elastic part can assist the staples to be better closed and formed, and under the action of the abutting force of the staples, the elastic part will be elastically deformed and the height will be reduced, thereby avoiding other parts in the stapler assembly, so that it can continue to move in the distal direction more smoothly without affecting the normal firing of the stapler. In addition, since the highest point height of the elastic part is not higher than the highest point height of the stapler body, the elastic part will not interfere with other parts in the stapler assembly during movement. Therefore, this firing structure can further ensure that the staples can be completely closed and formed and smoothly detached from the nail holes when the stapler is fired without affecting the firing smoothness of the stapler.

[0083] The specific structure of the firing structure in each specific embodiment will be described in detail below in conjunction with the accompanying drawings. It will be understood that the accompanying drawings and the following description are only examples and are not intended to limit the scope of protection of the present application. The same figure marks in the figures 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 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. Figure 3 The S3 direction is the lateral direction of the stapler. In the present application, for a component, the inner side and the outer side are relative to the axis of the stapler, the side close to the axis is the inner side, and the side away from the axis is the outer side.

[0084] In different embodiments, the firing structure may have different composition structures. For example, in embodiments 1 to 4, the elastic portion of the firing structure is an elastic member. In embodiments 5 and 6, the elastic portion of the firing structure is integrally formed with the driving portion. In embodiments 7 and 8, the firing structure mainly includes a first component and a second component. In embodiments 9 and 10, the firing structure mainly includes a first component, a second component and a third component.

[0085] Figures 1-2 FIG. 1 is a schematic diagram of a staple cartridge assembly according to Embodiment 1 of the present application. The staple cartridge assembly includes the firing structure, at least one staple and a staple cartridge body. Figure 1 and Figure 2 As shown, in this embodiment, the staple cartridge assembly includes a firing structure 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, and the firing structure 1 can move in the staple cartridge cover 100 along the axial direction of the stapler. Figure 2 As shown in FIG. 4 , the staple band 200 includes a staple band body 201 and staples 203 disposed on the side of the staple band body 201. The staples 203 in the same row are aligned in the axial direction. The staple band body 201 serves as a staple magazine body to cooperate with the staples 203. The staples 203 include staple feet 2032 and staple connecting portions 2031. The staples 203 are rotatably connected to the staple band body 201 through the staple connecting portions 2031. Only one structure of a staple magazine assembly is shown here by way of example. In another alternative embodiment, the staple magazine assembly may not be provided with a staple band, but may be provided with a staple magazine body having a plurality of staple holes formed therein, and each staple may be individually installed in each staple hole. This embodiment also falls within the scope of protection of the present application.

[0086] like Figure 2 , Figure 3As shown in FIG. 4( a ), the firing structure 1 includes a base 13 and at least one nail pushing portion 11 disposed on the base 13, and the nail pushing portion 11 includes a driving portion 111 and an elastic portion 112. The elastic portion 112 has the ability to undergo elastic deformation under external force and can return to an initial state after the external force is eliminated. The driving portion 111 is a rigid portion without elasticity or the driving portion 111 has elasticity but the elasticity is less than that of the elastic portion 112. The driving portion 111 and the base 13 are integrally arranged. The proximal end of the base 13 cooperates with a cutter assembly (not shown here), and when the stapler is fired, the base 13 can be driven by the cutter assembly to drive the nail pushing portion 11 to move toward the distal direction. The driving portion 111 is at least partially located on the distal side of the elastic portion 112, and the driving portion 111 is at least partially located on the distal side of the base 13. The base 13 is provided with a mounting groove 131. The elastic part 112 includes a mounting part 1121 and a protruding part 1122, wherein the mounting part 1121 is embedded in the mounting groove 131, and the protruding part 1122 at least partially protrudes above the mounting groove 131. The elastic part 112 is implemented by, for example, a metal spring or a plastic spring. In this embodiment, the number of the driving parts 111 corresponds to the number of the elastic parts 112, and the number of the driving parts 111 is the same as the number of rows of the staples 203, and they are respectively used to drive the corresponding staples 203 to close and form. The top of the base 13 is also provided with a nail cutting part 12 corresponding to the driving part 111, and the nail cutting part 12 is located at the proximal side of the nail pushing part 11. The nail pushing part 11 and the nail cutting part 12 are respectively aligned with the corresponding staples 203 in the axial direction, and the staples 203 are located on the path of the nail pushing part 11 moving toward the distal direction. As shown in Fig. 4(b), when the elastic portion 112 is in the initial state, the highest point height h1 of the elastic portion 112 is lower than or equal to (not higher than) the highest point height h2 of the staple band body 201. Thus, the elastic portion 112 will not protrude above the staple band body 201 and interfere with the staple magazine cover. The movement of the elastic portion 112 in the distal direction will not be hindered by the staple magazine cover, thereby ensuring the smoothness of the firing structure 1 in the process of advancing in the distal direction. Here, the elastic portion 112 is in the initial state, which refers to the state of the elastic portion 112 when the stapler is not fired and the elastic portion 112 is located at the proximal end of the staple magazine assembly along with the base 13. Figure 1As shown, a positioning portion 101 is provided at the proximal end of the staple magazine cover 100, which is opposite to the initial position of the elastic portion 112. As shown in FIG4(b), in the initial state, the highest point height h1 of the elastic portion 112 is higher than the highest point height h3 of the driving portion 111. During the firing process of the stapler, after the elastic portion 112 at least partially abuts against the staples 203 and is subjected to the abutting force of the staples 203, the elastic portion 112 can be elastically deformed and its height is reduced. In this embodiment, the height of the elastic portion 112, the height of the driving portion 111, and the height of the staple belt body 201 all refer to the height of the component relative to the bottom surface of the staple pushing portion 11 in the height direction of the staple pushing portion 11, as shown in FIG4(b). Figure 5 As shown, the S4 direction is the height direction of the stapler pushing portion 11 , and the height direction S4 of the stapler pushing portion 11 has a certain angle relative to the longitudinal direction of the stapler. Specifically, the height direction S4 of each stapler pushing portion 11 expands outward at a certain angle relative to the longitudinal direction of the stapler.

[0087] The specific process of the firing structure 1 when the stapler is fired is described in detail below. When the stapler is fired, the firing structure 1 is driven to move in the distal direction, the driving portion 111 first contacts the staple 203, and then drives the staple 203 to rotate around the staple connecting portion 2031 (along the R direction in Figure 4 (a)), and during the rotation of the staple 203, the staple foot 2032 of the staple 203 contacts the anvil, so that the staple 203 is gradually closed and formed under the action of the anvil. During the movement of the firing structure 1, since the highest point height of the elastic portion 112 is lower than or equal to the highest point height of the staple band body 201, the elastic portion 112 will not interfere with the staple magazine cover 100 and affect the smoothness of the firing process. When the firing structure 1 continues to move toward the distal end until the elastic part 112 abuts against the rotating staple 203, since the height of the elastic part 112 is higher than the height of the driving part 111, the elastic part 112 can better assist the closing molding of the staple 203, ensuring that the staple 203 can be completely closed. At the same time, under the abutting force of the staple 203 on the elastic part 112 in the proximal direction, the elastic part 112 will be elastically deformed and bent in the proximal direction (along the D1 direction in FIG. 4), so that the height of the elastic part 112 is reduced. Specifically, after the elastic part 112 is elastically deformed by the abutting force of the staple 203 in the proximal direction, the highest point height of the elastic part 112 is lower than or equal to the lowest point height of the staple connecting part 2031. When the firing structure 1 continues to move toward the distal end, the elastic part 112 can avoid the staple connecting part 2031 and pass smoothly from the bottom of the staple connecting part 2031. At the same time, after the elastic part 112 is elastically deformed by the resisting force in the proximal direction, the height of the highest point of the elastic part 112 is lower than or equal to the height of the highest point of the nail cutting part 12. Then, the firing structure 1 continues to move in the distal direction until the nail cutting part 12 contacts the nail connecting part 2031, and the nail cutting part 12 cuts off the connection between the nail connecting part 2031 and the nail belt 200, so that the staples 203 are separated from the nail belt 200, pass through the nail holes on the staple magazine cover 100, and are sutured on the tissue. When the elastic part 112 moves through a nail connecting part 2031 and reaches the distal side of the nail connecting part 2031, the elastic part 112 is separated from the staple 203, and the elastic part 112 is restored to the initial state under the action of the elastic restoring force, and can continue to be used to drive the closing and forming of the next staple 203.

[0088] In this embodiment, the firing structure 1 may be provided with a clearance space on the proximal side of the elastic portion 112. For example, the proximal surface of the mounting groove 131 may be set as an inclined surface, so that when the elastic portion 112 is subjected to the resisting force of the staples in the proximal direction, the elastic portion 112 is more easily bent in the proximal direction and elastically deformed. After the elastic portion 112 is elastically deformed, at least a portion of it enters the clearance space.

[0089] Figure 5 and Figure 6 Schematic diagram of the firing structure 1 of Example 2 of the present application. In this embodiment, the firing structure 1 includes a base 13 and at least one nail pushing portion 11 provided on the base 13, and the nail pushing portion 11 includes a driving portion 111 and an elastic portion 112. The elastic portion 112 is implemented by, for example, a metal spring or a plastic spring. The difference between this embodiment and Example 1 is that the structure and installation method of the elastic portion 112 are different. Figure 5 and Figure 6 As shown, the base 13 is provided with a first abutting portion 133 and a second abutting portion 134 located on the proximal side of the driving portion 111, and the elastic portion 112 includes a first mounting portion 11211, a protruding portion 1122, and a second mounting portion 11212 arranged in sequence, the first mounting portion 11211 and the second mounting portion 11212 are provided on the base 13 and respectively abut against the first abutting portion 133 and the second abutting portion 134, and a yielding groove 132 is provided at a position of the base 13 opposite to the protruding portion 1122. During the firing process of the stapler, after the driving portion 111 drives the staples to rotate, the elastic portion 112 abuts against the staples and drives the staples to further close and form, and under the abutting force of the staples on the elastic portion 112 toward the proximal direction, the protruding portion 1122 moves in the direction of the yielding groove 132 (along the Figure 6 The elastic portion 112 is elastically deformed in the direction of the center D2 (in the middle D2 direction), so that the height of the elastic portion 112 is reduced so that it can smoothly pass through the position of the staple connecting portion. Then, after the elastic portion 112 moves to the distal side of the staple connecting portion, the elastic portion 112 is separated from the staple. The elastic portion 112 bounces upward and returns to its initial state under the action of the elastic restoring force, so as to be used for the closing drive of the next staple.

[0090] Figure 7: is a schematic diagram of the firing structure 1 of Example 3 of the present application. In this embodiment, the firing structure 1 includes a base 13 and at least one nail pushing portion 11 provided on the base 13, and the nail pushing portion 11 includes a driving portion 111 and an elastic portion 112. The elastic portion 112 is implemented, for example, by a metal spring or a plastic spring. The difference between this embodiment and Example 1 is that the structure and installation method of the elastic portion 112 are different. The elastic portion 112 includes a mounting portion 1121 and a protruding portion 1122. The base 13 is provided with a mounting groove 131, and the mounting portion 1121 is installed in the mounting groove 131. The protruding portion 1122 at least partially protrudes above the mounting groove 131. The protruding portion 1122 is a bent portion having a free end 1123, and the free end 1123 extends obliquely toward the proximal direction relative to the mounting portion 1121. A clearance space is formed between the free end 1123 and the nail cutting portion 12. The driving part 111 and the corresponding protrusion 1122 together form a staple pushing part 11. When the elastic part 112 moves to abut against the staple and drives the staple to be further closed and formed, under the action of the proximal abutment force of the staple on the elastic part 112, the free end 1123 of the protrusion 1122 moves in the proximal direction to elastically deform the elastic part 112, so that the height of the elastic part 112 is reduced and can smoothly pass through the position of the staple connection part, and then after the elastic part 112 moves to the distal side of the staple connection part, the elastic part 112 is separated from the staple, and the elastic part 112 bounces upward and returns to the initial state under the action of the elastic restoring force, so as to be used for the next staple closing drive.

[0091] Figure 8 and Fig. 9: is a schematic diagram of a firing structure 1 of Example 4 of the present application. In this embodiment, the firing structure 1 includes a base 13 and at least one nail-pushing part 11 provided on the base 13, and the nail-pushing part 11 includes a driving part 111 and an elastic part 112. The elastic part 112 is implemented by, for example, a metal spring or a plastic spring. The difference between this embodiment and Example 1 is that the structure and installation method of the elastic part 112 are different. The elastic part 112 includes a mounting part 1121 and a protruding part 1122. The base 13 is provided with a mounting groove 131, and the mounting part 1121 is installed in the mounting groove 131. The protruding part 1122 at least partially protrudes above the mounting groove 131. The protruding part 1122 is a bent part having a free end 1123, and the free end 1123 is also located in the mounting groove 131. A certain gap is formed between the free end 1123 and the mounting part 1121, and the gap serves as a clearance space for the deformation of the protruding part 1122. When the protrusion 1122 moves to abut against the staple and drive the staple to further close and form, under the action of the proximal direction of the staple against the elastic portion 112, the free end 1123 of the protrusion 1122 moves downward to elastically deform the elastic portion 112, so that the height of the elastic portion 112 is reduced and it can smoothly pass through the position of the staple connecting portion. Then, after the elastic portion 112 moves to the distal side of the staple connecting portion, the elastic portion 112 is separated from the staple, and the elastic portion 112 bounces upward to return to its initial state under the action of the elastic restoring force, so as to be used for the closing drive of the next staple.

[0092] Fig.10Schematic diagram of the firing structure of Example 5 of the present application. The firing structure 2 includes a base 23 and at least one nail pushing portion 21 provided on the base 23. The base 23 is used to cooperate with the cutting knife assembly (not shown in the figure) on the proximal side and be driven to move in the distal direction. The nail pushing portion 21 is at least partially located on the distal side of the base 23. The nail pushing portion 21 includes a driving portion 211 and an elastic portion 212. The top of the base 23 is provided with a nail cutting portion 22. The driving portion 211 is at least partially located on the distal side of the elastic portion 212. The elastic portion 212 is located on the distal side of the nail cutting portion 22. The elastic portion 212 is integrally formed with the base 23. The elastic part 212 includes a fixed end 2121, a protruding part 2122 and a free end 2123 which are arranged in sequence. The fixed end 2121 of the elastic part 212 is fixed to the proximal side of the driving part 211. The free end 2123 of the elastic part 212 extends in the proximal direction relative to the fixed end 2121. The protruding part 2122 is an elastic bending part. The base 23 is provided with an avoidance slope on the proximal side of the elastic part 212 to form a clearance space 231 on the proximal side of the elastic part 212, so that the elastic part 212 has space to move in the proximal direction and elastically deform when subjected to the proximal holding force of the staples. After the elastic deformation, the elastic part 212 at least partially enters the clearance space 231.

[0093] When the stapler is not fired, the firing structure 2 is located at the proximal end of the staple cartridge assembly, the elastic portion 212 is in an initial state, the highest point height of the elastic portion 212 is lower than or equal to the highest point height of the staple belt body, and the highest point height of the elastic portion 212 is higher than the highest point height of the driving portion 211. When the stapler is fired, the firing structure 2 is driven to move toward the distal direction, the driving portion 211 first contacts the staples, and then drives the staples to rotate around the staple connection portion, during the rotation of the staples, the staples contact the anvil, and the staples are gradually closed and formed under the action of the anvil. During the movement of the firing structure 2, since the highest point height of the elastic portion 212 is lower than or equal to the highest point height of the staple belt body, the elastic portion 212 will not interfere with the staple cartridge cover and affect the smoothness of the firing process. When the firing structure 2 continues to move in the distal direction until the elastic part 212 abuts against the rotating staple, since the height of the elastic part 212 is higher than the height of the driving part 211, the elastic part 212 can better assist the closing molding of the staple, ensuring that the staple can be completely closed. At the same time, under the action of the proximal holding force of the staple on the elastic part 212, the elastic part 212 will be elastically deformed and bent in the proximal direction, and the free end 2123 moves in the proximal direction, so that the height of the elastic part 212 is reduced. Specifically, after the elastic part 212 is elastically deformed by the proximal holding force of the staple, the highest point height of the elastic part 212 (the highest point height of the protrusion 2122) is lower than or equal to the lowest point height of the staple connection part. When the firing structure 2 continues to move in the distal direction, the elastic part 212 can avoid the staple connection part and pass smoothly from the bottom of the staple connection part. At the same time, after the elastic part 212 is elastically deformed by the resisting force in the proximal direction, the height of the highest point of the elastic part 212 is lower than or equal to the height of the highest point of the nail cutting part 22. Then the firing structure 2 continues to move in the distal direction until the nail cutting part 22 contacts the nail connecting part, and the nail cutting part 22 cuts off the connection between the nail connecting part and the nail band, so that the staples are separated from the nail band, pass through the nail holes of the staple magazine cover and are sutured on the tissue. When the elastic part 212 moves through a nail connecting part and reaches the distal side of the nail connecting part, the elastic part 212 is separated from the staples, and the elastic part 212 returns to the initial state under the action of the elastic restoring force, and can continue to be used to drive the closing and forming of the next staple.

[0094] Fig.11 and Fig.12It is a schematic diagram of the firing structure of Example 6 of the present application. The firing structure 2 includes a base 23 and at least one nail pushing portion 21 provided on the base 23. The nail pushing portion 21 includes a driving portion 211 and an elastic portion 212, and a nail cutting portion 22 is provided on the top of the base 23. The elastic portion 212 is integrally formed with the driving portion 211 to form an integrated nail pushing portion 21. The elastic portion 212 includes a fixed end 2121, a protruding portion 2122 and a free end 2123 which are arranged in sequence, and the protruding portion 2122 is an elastic bending portion. The fixed end 2121 of the elastic portion 212 is integrally connected with the driving portion 211, and the free end 2123 of the elastic portion 212 extends in the proximal direction relative to the fixed end 2121. The base 23 is provided with an avoidance slope on the proximal side of the elastic part 212 to form a clearance space 231 on the proximal side of the elastic part 212, so that the elastic part 212 has space to move in the proximal direction and elastically deform when subjected to a resisting force in the proximal direction. The number of the staple pusher parts 21 is the same as the number of rows of staples, and only the outer staple pusher parts 21 are shown here for example. The matching mode between the staple pusher parts 21 of this embodiment and the staples is similar to that of Example 5. During the firing process of the stapler, after the driving portion 211 drives the stapler to rotate, the elastic portion 212 resists against the stapler and drives the stapler to further close and form. Under the resisting force of the stapler on the elastic portion 212 in the proximal direction, the free end 2123 of the elastic portion 212 moves in the proximal direction to elastically deform the elastic portion 212, so that the height of the elastic portion 212 is reduced and it can smoothly pass through the position of the staple connecting portion. Then, after the elastic portion 212 moves to the distal side of the staple connecting portion, the elastic portion 212 is separated from the staple. Under the action of the elastic restoring force, the elastic portion 212 bounces upward and returns to the initial state, so as to be used for the closing drive of the next staple.

[0095] like Fig.11 and Fig.12As shown, a limiting portion 2124 is provided on the side of the elastic portion 212, and the limiting portion 2124 is a step portion provided on the inner side of the elastic portion 212. The upper surface of the limiting portion 2124 abuts against the nail belt body 201 to prevent the elastic portion 212 from interfering with the nail magazine cover due to its excessive height and affecting the smoothness of the axial movement of the firing structure 2, and the limiting portion 2124 can maintain the stability of the relative position between the nail belt body 201 and the firing structure 2 to prevent the firing structure 2 from having a lateral displacement relative to the nail belt body 201. The limiting portion 2124 can also be provided on the driving portion 211 or the base 23 to maintain the stability of the relative position between the nail belt body 201 and the firing structure 2 to prevent the firing structure 2 from having a lateral displacement relative to the nail belt body 201. The limiting portion 2124 can also be applied to the firing structures of other embodiments, and the driving portion, elastic portion or base provided on the firing structure of other embodiments are all within the protection scope of this application.

[0096] Fig.13 and Fig.14The schematic diagram of the firing structure 3 of the embodiment 7 of the present application is shown. In this embodiment, the firing structure 3 includes a base 33 and at least one nail pushing part provided on the base 33. The base 33 is used to cooperate with the cutting knife assembly (not shown in the figure) on the proximal side and be driven to move in the distal direction. The nail pushing part is at least partially located on the distal side of the base 33. The nail pushing part includes a first nail pushing part 31a and a second nail pushing part 31b. Correspondingly, the first nail pushing part 31a includes an integrally formed first driving part 311a and a first elastic part 312a. The first driving part 311a is at least partially located on the distal side of the first elastic part 312a. The second nail pushing part 31b includes an integrally formed second driving part 311b and a second elastic part 312b. The second driving part 311b is at least partially located on the distal side of the second elastic part 312b. The top of the base 33 is provided with a nail cutting part 32. The nail cutting part 32 is located on the proximal side of the first elastic part 312a and the second elastic part 312b. The firing structure 3 is composed of a first component (a first nail-pushing part 31a) and a second component (a second nail-pushing part 31b, a base 33 and a nail-cutting part 32) which are relatively independent and interconnected. The first nail-pushing part 31a is provided with a first assembly part 313a, and the base 33 is provided with a second assembly part 331. The first component and the second component are connected through the first assembly part 313a and the second assembly part 331, the base 33 is connected to the proximal side of the first nail-pushing part 31a, and the second nail-pushing part 31b is located on the outside of the first nail-pushing part 31a. In this embodiment, the first assembly part 313a is a convex block, and the second assembly part 331 is a mounting hole. The convex block is inserted into the mounting hole from top to bottom. In other alternative embodiments, the first assembly part may be a mounting hole, the second assembly part may be a convex block, or the first assembly part and the second assembly part may adopt other structures and matching methods, all of which are within the protection scope of the present application. The first nail pushing part 31a and the second nail pushing part 31b are used to push the corresponding rows of staples respectively. When the firing structure 3 moves in the distal direction until the first nail pushing part 31a contacts the staples, the first driving part 311a first abuts against the staples and drives the staples to rotate, and then the first elastic part 312a abuts against the staples and drives the staples to further close and form. The first elastic part 312a is elastically deformed and lowered in height by the abutting force of the staples in the proximal direction. The first elastic part 312a passes under the staple connection part, and the staple cutting part 32 cuts off the connection between the staple connection part and the staple belt body to separate the staples from the staple belt body. After the first elastic part 312a separates from the staples, the first elastic part 312a returns to the initial state under the elastic restoring force to drive the next staple. The working principle of the second nail pushing part 31b is the same as that of the first nail pushing part 31a, which will not be repeated here.

[0097] Fig.15 and Fig.16 : is a schematic diagram of a firing structure 4 of Example 8 of the present application. In this embodiment, the firing structure 4 includes a base 43 and at least one nail pushing portion 41 provided on the base 43. The base 43 is used to cooperate with a cutter assembly (not shown in the figure) on the proximal side and be driven to move in the distal direction. The nail pushing portion 41 is at least partially located on the distal side of the base 43. The nail pushing portion 41 is provided with a first assembly portion 413. The nail pushing portion 41 includes an integrally formed driving portion 411 and an elastic portion 412. The driving portion 411 is at least partially located on the distal side of the elastic portion 412. The base 43 is provided with a second assembly portion 431. The top of the base 43 is provided with a nail cutting portion 42. The nail cutting portion 42 is located on the proximal side of the elastic portion 412. Therefore, the firing structure 4 is composed of a relatively independent and interconnected first component (nail pushing part 41) and a second component (base 43 and nail cutting part 42), and the first component and the second component are connected by the first assembly part 413 and the second assembly part 431. In this embodiment, the first assembly part 413 is a mounting hole, and the second assembly part 431 is a mounting column, and the mounting column is horizontally penetrated in the mounting hole. The present application is not limited to this. In other alternative embodiments, the first assembly part may be a mounting column, the second assembly part may be a mounting hole, or the first assembly part and the second assembly part may adopt other structures and matching methods, all of which belong to the protection scope of the present application. The matching method between the firing structure 4 of this embodiment and the staples is the same as that of Example 6, which will not be repeated here.

[0098] Figures 17 to 19The schematic diagram of the firing structure 5 of the embodiment 9 of the present application is shown. In this embodiment, the firing structure 5 includes a base 53 and at least one nail-pushing part provided on the base 53. The base 53 is used to cooperate with the cutter assembly (not shown in the figure) on the proximal side and be driven to move in the distal direction. The nail-pushing part is at least partially located on the distal side of the base 53. The nail-pushing part includes a first nail-pushing part 51a and a second nail-pushing part 51b. Correspondingly, the first nail-pushing part 51a includes an integrally formed first driving part 511a and a first elastic part 512a. The first driving part 511a is at least partially located on the distal side of the first elastic part 512a. The second nail-pushing part 51b includes an integrally formed second driving part 511b and a second elastic part 512b. The second driving part 511b is at least partially located on the distal side of the second elastic part 512b. The first elastic part 512a and the second elastic part 512b are elastic arms extending in the proximal direction and suspended in the air. The top of the base 53 is also provided with a nail cutting part 52. The firing structure 5 is composed of a relatively independent and mutually connected first component (first nail pushing part 511a), a second component (second nail pushing part 51b and base 53) and a third component (nail cutting part 52). The first nail pushing part 51a is provided with a first assembly part 513a and a third assembly part 514a, and the base 53 is provided with a second assembly part 533, a fourth assembly part 534, a fifth assembly part 535 and a first limiting structure 536. The first assembly part 513a is a first mounting column, the second assembly part 533 is a first mounting hole engaged with the first mounting column, the third assembly part 514a is a second mounting hole, and the fourth assembly part 534 is a second mounting column engaged with the third assembly part 514a. By providing two pairs of assembly structures, the stability of the connection and cooperation between the first component and the second component can be improved. The nail cutting part 52 includes a sixth assembly part 521 and a second limiting structure 522. The fifth assembly portion 535 is a third mounting column, and the sixth assembly portion 521 is a mounting hole that is engaged with the third mounting column, so that the third component is installed on the proximal side of the second component. The first limiting structure 536 and the second limiting structure 522 are engaged with each other to block the lateral movement of the nail cutting portion 52 relative to the base 53. In this embodiment, the first limiting structure 536 and the second limiting structure 522 are respectively wavy structures, and the two are staggered and engaged with each other. The first component and the second component can be plastic parts respectively, and the third component can be a metal part to increase the hardness of the nail cutting portion 52, so that when the nail cutting portion 52 is against the nail connecting portion of the staple, it is easier to cut off the connection between the nail connecting portion and the staple belt body. The cooperation method between the firing structure 5 and the staple of this embodiment is the same as that of Example 7, which will not be repeated here.

[0099] Fig. 20 and Fig.21A schematic diagram of the firing structure 5 of Example 10 of the present application is shown. The difference between this embodiment and Example 9 is that a support portion 523 is provided at the distal end of the nail cutting portion 52. Since the nail cutting portion 52 is made of a metal material with relatively high hardness, the support portion 523 abuts against the proximal side of the first driving portion 511a and the second driving portion 511b, which can further improve the structural stability of the first driving portion 511a and the second driving portion 511b. The first elastic portion 512a and the second elastic portion 512b are elastic arms that extend proximally relative to the first driving portion 511a and the second driving portion 511b and are suspended in the air. When they are subjected to the abutting force of the staples in the proximal direction, they will move downward and undergo elastic deformation and reduce their height. The cooperation mode between the firing structure 5 of this embodiment and the staples is the same as that of Example 7, which will not be repeated here.

[0100] 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 structure, characterized in that: A stapler magazine assembly for a surgical stapler and can be driven to move along the axial direction of the surgical stapler, the stapler magazine assembly includes a stapler magazine body, the firing structure includes a base and a staple pushing portion arranged on the base, the staple pushing portion includes a driving portion and an elastic portion, the driving portion is at least partially located on the distal side of the elastic portion, when the elastic portion is in an initial state, the highest point height of the elastic portion is not higher than the highest point height of the stapler magazine body, and the elastic portion is configured to be elastically deformed and reduced in height when driven to move in the distal direction.

2. The firing structure according to claim 1, characterized in that: The staple cartridge assembly further comprises at least one staple, the staple being rotatably connected to the staple cartridge body via a staple connecting portion, the staple being aligned along an axial direction, and the staple being aligned with the staple pushing portion in an axial direction; The firing structure is driven to move in the distal direction so that the elastic part is abutted against the at least one staple. After the elastic part is elastically deformed by the abutting force of the staple, the height of the highest point of the elastic part is lower than or equal to the height of the lowest point of the staple connecting part. After the firing structure continues to move in the distal direction and disengages from the staple, the elastic part returns to its initial state.

3. The firing structure according to claim 1, characterized in that: When the elastic part is in an initial state, the height of the highest point of the elastic part is higher than the height of the highest point of the driving part.

4. The firing structure according to claim 1, characterized in that: The firing structure is provided with a clearance space on the proximal side of the elastic part, so that the elastic part can enter the clearance space after being deformed.

5. The firing structure according to claim 1, characterized in that: The base is further provided with a nail cutting portion, which is located at the proximal side of the nail pushing portion. After the elastic portion is elastically deformed, the height of the highest point of the elastic portion is lower than or equal to the height of the highest point of the nail cutting portion.

6. The firing structure according to claim 1, characterized in that: The elastic part is an elastic member, and the elastic member is installed on the base.

7. The firing structure according to claim 6, characterized in that: The base is provided with a mounting groove, the driving part is at least partially located at the distal side of the mounting groove, the elastic member includes a protruding part and a mounting part, the mounting part is embedded in the mounting groove, and the protruding part at least partially protrudes above the mounting groove.

8. The firing structure according to claim 6, characterized in that: The base is provided with a first supporting portion and a second supporting portion located on the proximal side of the driving portion, and the elastic member includes a first mounting portion, a protruding portion and a second mounting portion which are arranged in sequence, the first mounting portion and the second mounting portion are arranged on the base and respectively abut against the first supporting portion and the second supporting portion, and a yield groove is provided at a position of the base opposite to the protruding portion.

9. The firing structure according to claim 1, characterized in that: The elastic portion is integrally formed with the driving portion and / or the base portion.

10. The firing structure according to claim 9, characterized in that: The elastic part comprises a fixed end, a protruding part and a free end which are arranged in sequence. The fixed end of the elastic part is fixed to the driving part, and the free end of the elastic part extends toward the proximal direction relative to the fixed end.

11. The firing structure according to claim 1, characterized in that: The nail pushing portion includes a first nail pushing portion and a second nail pushing portion, wherein the second nail pushing portion is disposed at a distal end side of the base, the first nail pushing portion is connected to the base via a first assembly portion, and the second nail pushing portion is located outside the first nail pushing portion.

12. The firing structure according to claim 1, characterized in that: The nail pushing part is provided with a first assembly part, and the base is provided with a second assembly part. The first assembly part is connected with the second assembly part so that the nail pushing part is fixed to the base.

13. The firing structure according to claim 11 or 12, characterized in that: It also includes a nail cutting part, the base is provided with a third assembly part and a first limiting structure, the nail cutting part is provided with a fourth assembly part and a second limiting structure, the fourth assembly part is connected to the third assembly part to fix the nail cutting part to the base, the nail cutting part is at least partially located on the proximal side of the nail pushing part, the first limiting structure and the second limiting structure are embedded in order to block the lateral movement of the nail cutting part relative to the base.

14. A staple cartridge assembly, characterized in that: Comprising the firing structure described in any one of claims 1 to 13.

15. A surgical stapler, characterized in that: Includes the nail magazine assembly described in claim 14.

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