Nail head part and surgical anastomat

Abstract

The invention provides a nail head part and a surgical anastomat. The nail head part comprises a first forceps clip and a second forceps clip, the second forceps holder comprises a first side surface opposite to the first forceps holder; the auxiliary sheet comprises an auxiliary sheet body and at least one connecting part, the connecting part is connected to the auxiliary sheet body, and the connecting part is fixed to the first side surface of the second forceps holder; the at least one separating assembly is movably arranged on the second forceps clip, the separating assembly comprises a cutting-off piece, when the cutting-off piece is driven to move in the first direction, the first side of the cutting-off piece cuts the connecting position of the auxiliary piece body and the connecting part, so that the auxiliary piece body is separated from the connecting part, and the second side of the cutting-off piece cuts the connecting position of the auxiliary piece body and the connecting part; the first direction is the direction from the second forceps holder to the first forceps holder. When the anastomat is triggered, the auxiliary piece body can be separated from the connecting part by driving the separating assembly, so that the auxiliary piece body is smoothly separated from the second forceps holder and is bound on the tissue.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly relates to a staple head and a surgical stapler. Background Art

[0002] A surgical stapler includes a stapler body, a staple cartridge and an anvil located at the distal end of the stapler body. The proximal ends of the staple cartridge and the anvil are rotatably connected so that the jaws between the staple cartridge and the anvil can be opened or closed. Before the operation, sometimes it is necessary to set auxiliary sheets with specific functions on the surface of the staple cartridge and / or the anvil. At this time, it is necessary to form a stable and non-detachable connection between the auxiliary sheets and the staple cartridge and / or the anvil. During the operation, the two tissues to be anastomosed are clamped between the anvil and the staple cartridge, and then the jaws between the staple cartridge and the anvil are closed to clamp the tissues. Then, the anastomosis staples inside the staple cartridge are pushed outwards to be formed on the surface of the anvil to anastomose the tissues. During this process, the auxiliary sheets will separate from the staple cartridge and / or the anvil and be stapled to the tissues together with the anastomosis staples. However, when the existing staplers are in use, it is difficult to balance the two aspects of the stable connection and the smooth separation of the auxiliary sheets, and it may occur that the auxiliary sheets cannot be smoothly separated from the staple cartridge and / or the anvil during the operation, affecting the surgical effect. Summary of the Invention

[0003] Aiming at the problems in the prior art, the purpose of the present application is to provide a staple head and a surgical stapler, which can drive a separation component to separate the auxiliary sheet body from the connecting part when the stapler is fired, so that the auxiliary sheet body can be smoothly separated from the second clamp and be stapled to the tissue.

[0004] An embodiment of the present application provides a staple head, including:

[0005] A first clamp;

[0006] A second clamp, the second clamp including a first side surface opposite to the first clamp;

[0007] An auxiliary sheet, located between the first clamp and the second clamp, the auxiliary sheet including an auxiliary sheet body and at least one connecting part, the connecting part being connected to the auxiliary sheet body, and the connecting part being fixed to the first side surface of the second clamp;

[0008] At least one separation component, movably arranged on the second clamp, the separation component including a cutting member, when the cutting member is driven to move in a first direction, a first side of the cutting member cuts the connection position between the auxiliary sheet body and the connecting part to separate the auxiliary sheet body from the connecting part, and the first direction is the direction from the second clamp to the first clamp.

[0009] In some embodiments, a mating groove for receiving the separating assembly is formed in the second clamp. In an initial state, the first side of the cutting member is located inside the mating groove and does not protrude from the first side surface of the second clamp.

[0010] In some embodiments, the projection of the connection position between the auxiliary sheet body and the connecting portion on the first side surface of the second clamp at least partially coincides with the projection of the cutting member on the first side surface of the second clamp.

[0011] In some embodiments, the connecting portion is provided at the distal end and / or the proximal end of the auxiliary sheet body, and the separating assembly is provided at the distal end and / or the proximal end of the second clamp.

[0012] In some embodiments, the second clamp is provided with a staple groove arranged along the axial direction of the staple head, and the mating groove is parallel and / or perpendicular to the staple groove.

[0013] In some embodiments, when the mating groove is parallel to the staple groove, the mating groove is the staple groove located at the farthest end and / or the nearest end, and the separating assembly is arranged in the staple groove.

[0014] In some embodiments, the separating assembly further includes a driving member. The driving member is connected to the second side of the cutting member. The staple head further includes a firing block. At least a part of the firing block enters the second clamp. After the firing block moves from the proximal end to the distal end of the second clamp and abuts against the driving member, the firing block drives the cutting member to move along the first direction through the driving member.

[0015] In some embodiments, an inclined guiding surface is provided on the proximal side of the driving member. After the firing block moves from the proximal end to the distal end of the second clamp and abuts against the guiding surface, the firing block continues to move towards the distal side direction, driving the driving member to move along the first direction.

[0016] In some embodiments, the separating assembly further includes an elastic member. The elastic member is configured to provide a biasing force to the driving member along a second direction, and the second direction is opposite to the first direction.

[0017] In some embodiments, the axial width of the driving member is greater than the axial width of the cutting member. The second clamp is provided with a first receiving groove for receiving the cutting member and a second receiving groove for receiving the driving member. The axial width of the second receiving groove is greater than the axial width of the first receiving groove. A stepped surface is provided at the connecting position between the second receiving groove and the first receiving groove. Two ends of the elastic member respectively abut against the stepped surface and the driving member.

[0018] In some embodiments, the axial width of the first side of the cutting member is smaller than the axial width of the second side of the cutting member.

[0019] In some embodiments, at least one of the connecting portions is respectively provided at the distal end and the proximal end of the auxiliary sheet body. The separating assembly includes at least one first separating assembly provided at the proximal end of the second clamping jaw and at least one second separating assembly provided at the distal end of the second clamping jaw. When the firing block moves from the proximal end to the distal end of the second clamping jaw, the first separating assembly and the second separating assembly are sequentially driven.

[0020] In some embodiments, the second clamping jaw includes a plurality of staple grooves. The first separating assembly is provided on the proximal side of the nearest staple groove, and the second separating assembly is provided on the distal side of the farthest staple groove.

[0021] In some embodiments, a weak connection structure is formed at the connection position between the auxiliary sheet body of the auxiliary sheet and the connecting portion.

[0022] In some embodiments, the connecting portion of the auxiliary sheet and the first side surface of the second clamping jaw are fixed by magnetic attraction, Velcro, fitting or pasting.

[0023] In some embodiments, the second clamping jaw is provided with a cutter groove extending along the axis of the staple head. The auxiliary sheet includes a plurality of the connecting portions, and the plurality of connecting portions are symmetrically arranged with respect to the cutter groove.

[0024] An embodiment of the present application further provides a surgical stapler, including the staple head described above.

[0025] The staple head and the surgical stapler provided by the present application have the following advantages:

[0026] By adopting the present application, before the stapler is fired, the auxiliary sheet can be fixed to the second clamping jaw through the connecting portion to prevent the auxiliary sheet from accidentally falling off the second clamping jaw. When the stapler is fired, the separating assembly can be driven to move towards the first clamping jaw. The cutting member of the separating assembly cuts the connection position between the auxiliary sheet body and the connecting portion, so that the auxiliary sheet body is separated from the connecting portion, and then the auxiliary sheet body can be smoothly separated from the second clamping jaw and stapled to the tissue. It will not cause traction on the tissue due to the connection between the auxiliary sheet and the stapler, and it is not necessary for the doctor to separate the auxiliary sheet from the stapler, which is beneficial to improving the surgical effect. Description of the Drawings

[0027] By reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, other features, objects and advantages of the present application will become more apparent.

[0028] Figure 1 It is a schematic diagram of the cooperation between the staple head and the connecting rod according to an embodiment of the present application;

[0029] Figure 2 It is a schematic structural diagram of the nail head in an embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the cooperation between the staple cartridge and the auxiliary piece in an embodiment of the present application;

[0031] Figure 4 It is Figure 3 The enlarged view at A1 in

[0032] Figure 5 It is Figure 3 The enlarged view at A2 in

[0033] Figure 6 It is a schematic diagram of the cooperation between the staple cartridge, the auxiliary piece and the separation component in an embodiment of the present application;

[0034] Figure 7 It is Figure 6 The enlarged view at A3 in

[0035] Figure 8 It is Figure 6 The enlarged view at A4 in

[0036] Figure 9 It is a schematic structural diagram of the staple cartridge in an embodiment of the present application;

[0037] Figure 10 It is a partial top view of the staple cartridge in an embodiment of the present application;

[0038] Figure 11 It is Figure 10 The cross-sectional view in the B1-B1 direction in

[0039] Figure 12 It is Figure 10 The cross-sectional view in the B2-B2 direction in

[0040] Figure 13 It is a schematic structural diagram of the first cutting member and the first driving member in an embodiment of the present application;

[0041] Figure 14 It is a schematic structural diagram of the second cutting member and the second driving member in an embodiment of the present application;

[0042] Figure 15 It is a schematic diagram of the cooperation between the separation component and the auxiliary piece in the initial state in an embodiment of the present application;

[0043] Figure 16 It is a schematic diagram of the first cutting member cutting the auxiliary piece in an embodiment of the present application;

[0044] Figure 17 It is a schematic diagram of the second cutting member cutting the auxiliary piece in an embodiment of the present application;

[0045] Figure 18 It is a schematic diagram of the cooperation of the cutting member, the auxiliary piece and the staple cartridge according to an embodiment of the present application;

[0046] Figure 19 It is a schematic diagram of the cooperation of the staple cartridge and the auxiliary piece according to another embodiment of the present application;

[0047] Figure 20 It is a schematic diagram of the cooperation of the cutting member, the auxiliary piece and the staple cartridge according to another embodiment of the present application.

[0048] Reference numerals:

[0049] 1 Staple cartridge holder 61 Cutting member

[0050] 2 Staple cartridge 61A First cutting member

[0051] 21 Staple groove 61B Second cutting member

[0052] 22 Cutter groove 62 Driving member

[0053] 23 Fitting groove 62A First driving member

[0054] 231 First receiving groove 62B Second driving member

[0055] 232 Second receiving groove 621 Guide surface

[0056] 233 Step surface 621A First guide surface

[0057] 24 Mounting groove 621B Second guide surface

[0058] 25 Pusher block 622 Elastic member fitting portion

[0059] 26 Support column 622A First elastic member fitting portion

[0060] 3 Anvil 622B Second elastic member fitting portion

[0061] 4 Auxiliary piece 623A First relief groove

[0062] 41 Connecting portion 623B Second relief groove

[0063] 42 Second cutting hole 63 Elastic member

[0064] 43 Opening 63A First elastic member

[0065] 44 Body portion 63B Second elastic member

[0066] 45 First cutting hole 8 Firing block

[0067] 51 First fixing part 9 connecting rod

[0068] 52 Second fixing part 101 Velcro connection structure Detailed implementation manners

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repeated description will be omitted. The "or" or "or" in the specification may both represent "and" or "or". Although terms such as "upper", "lower", "between" etc. may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, for example, according to the directions of the examples described in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of this application. Although terms such as "first" or "second" etc. are used in this specification to represent certain features, they are only for representational purposes and do not limit the quantity and importance of the specific features.

[0070] This application provides a staple head and a surgical stapler including the staple head. The surgical stapler further includes a stapler body, and the staple head is provided at the distal end of the stapler body. The staple head includes a first clamp, a second clamp, a auxiliary sheet, and at least one separation assembly. The first clamp and the second clamp are oppositely arranged, and the second clamp includes a first side surface opposite to the first clamp. The auxiliary sheet is located between the first clamp and the second clamp. The auxiliary sheet includes an auxiliary sheet body and at least one connecting portion. The connecting portion is connected to the auxiliary sheet body and fixed to the first side surface of the second clamp. Therefore, before the stapler is fired, the auxiliary sheet can be fixed to the second clamp through the connecting portion to prevent the auxiliary sheet from accidentally falling off the second clamp.

[0071] The separation assembly is movably provided on the second clamp. The separation assembly includes a cutting member. When the stapler is fired, the separation assembly can be driven to move in a first direction towards the first clamp. The cutting member of the separation assembly cuts the connection position between the auxiliary sheet body and the connecting portion, so that the auxiliary sheet body is separated from the connecting portion, and then the auxiliary sheet body can be smoothly separated from the second clamp and stapled to the tissue, without causing traction to the tissue due to the connection between the auxiliary sheet and the stapler, and there is no need for the doctor to separate the auxiliary sheet from the stapler, which is beneficial to improving the surgical effect.

[0072] The structure of the staple head in a specific embodiment will be introduced below with reference to the accompanying drawings. It can be understood that each embodiment is only an example and does not limit the protection scope of this application.

[0073] As shown Figures 1 - 6 in the figure, the staple head includes a first clamp, a second clamp, an auxiliary piece 4 and at least one separating component. The proximal end of the staple head is connected to a connecting rod 9. In this embodiment, the first clamp is taken as an anvil 3 and the second clamp is taken as a cartridge assembly for illustration. The cartridge assembly and the anvil 3 are oppositely arranged. The cartridge assembly includes a cartridge 2 for accommodating staples and a cartridge holder 1 for accommodating the cartridge 2. The cartridge 2 includes a cartridge surface facing the anvil 3. The cartridge 2 is provided with a cutter groove 22 and a plurality of staple grooves 21, and a pusher block 25 is installed in each of the staple grooves 21. A firing block 8 is further provided in the cartridge 2. In the initial state, the pusher block 25 and the staples are located inside the staple groove 21, and the firing block 8 is located at the proximal end of the cartridge 2 (as shown Figure 3 in the figure). When the stapler is fired, the firing block 8 is driven to move from the proximal end to the distal end, successively pushing the pusher block 25 outwards, and the pusher pushes the staples towards the anvil 3, so that the staples are stapled to the tissue. After the stapler is fired, the firing block 8 is located at the distal end of the cartridge 2 (as shown Figure 6 in the figure).

[0074] 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 position, is the distal end. The direction along the axis of the staple head is the axial direction, that is, the direction from the distal end to the proximal end of the staple head, or the direction from the proximal side to the distal side of the staple head. As shown Figure 1 in the figure, the S direction is the direction from the distal end to the proximal end of the staple head, and the S direction or the direction opposite to the S direction is defined as the axial direction of the staple head. The first direction refers to the direction from the cartridge 2 to the anvil 3, and the second direction refers to the opposite direction of the first direction. For example, in the perspective shown Figures 15 - 17 in the figure, the first direction refers to the direction from bottom to top, and the second direction refers to the direction from top to bottom. In this embodiment, the first direction and the second direction are parallel to the longitudinal direction of the stapler, that is, the height direction.

[0075] As shown Figures 2 - 5As shown, the auxiliary sheet 4 is located between the anvil 3 and the cartridge 2. The auxiliary sheet 4 includes an auxiliary sheet body 44 and at least one connecting portion 41. The connecting portion 41 is connected to the auxiliary sheet body 44, and the connecting portion 41 is fixed to the cartridge surface of the cartridge 2. Therefore, before the stapler is fired, the auxiliary sheet 4 can be fixed to the cartridge 2 through the connecting portion 41 to prevent the auxiliary sheet 4 from accidentally falling off the cartridge 2. The auxiliary sheet 4 can be a thin sheet coated with an anti-inflammatory drug, or an auxiliary sheet 4 for strengthening the anastomosis, or a biological patch, etc. In this embodiment, a plurality of second cutting holes 42 are provided at a position corresponding to the cutter groove 22 of the auxiliary sheet 4, and the plurality of second cutting holes 42 are arranged along the axial direction; openings 43 are provided at the distal end and the proximal end of the auxiliary sheet 4 at positions corresponding to the cutter groove 22. The opening 43 can be a triangular opening 43, but the present application is not limited thereto. By providing the cutting holes and the openings 43, when the cutter cuts the tissue, the auxiliary sheet 4 is more easily cut by the cutter, making the cutter cut the tissue and the auxiliary sheet 4 more smoothly and preventing the auxiliary sheet 4 from hindering the movement of the cutter.

[0076] Two connecting portions 41 are respectively provided at the distal end and the proximal end of the auxiliary sheet body 44, and the two connecting portions 41 at the distal end are symmetrically arranged with respect to the cutter groove 22, and the two connecting portions 41 at the proximal end are symmetrically arranged with respect to the cutter groove 22. In this embodiment, the connecting portion 41 is provided with a second fixing portion 52, and the distal end and the proximal end of the cartridge 2 are respectively provided with mounting grooves 24. A first fixing portion 51 is provided in the mounting groove 24, and the first fixing portion 51 and the second fixing portion 52 can be fixed to each other by magnetic attraction, so that the auxiliary sheet 4 is fixed to the cartridge surface of the cartridge 2 through the connecting portion 41. The first fixing portion 51 and the second fixing portion 52 can be magnets having magnetism by themselves or electromagnets having magnetism when energized, and the magnetisms are opposite, or one of the first fixing portion 51 and the second fixing portion 52 itself has magnetism, and the other is a metal portion that can be magnetically attracted.

[0077] As Figures 6 - 9As shown, the separation component is movably disposed in the staple cartridge 2. The second clamp is provided with a fitting groove 23 for accommodating the separation component, and at least a part of the separation component is located in the fitting groove 23. The separation component includes a cutting member 61 and a driving member 62. The first side and the second side of the cutting member 61 respectively refer to the upper side and the lower side of the cutting member 61. The second side of the cutting member 61 is fixed to the driving member 62 and is linked with the driving member 62. The axial width of the first side of the cutting member 61 is smaller than the axial width of the second side of the cutting member 61, so that the first side of the cutting member 61 forms a blade shape, and the first side of the cutting member 61 can optionally form a taper that is easy to cut the auxiliary piece 4. In this embodiment, the projection of the connection position between the auxiliary piece body 44 and the connecting portion 41 on the staple surface of the staple cartridge 2 at least partially coincides with the projection of the cutting member 61 on the staple surface of the staple cartridge 2, that is, the cutting member 61 is located below the connection position between the auxiliary piece body 44 and the connecting portion 41 along the longitudinal direction. When the stapler is fired, when the cutting member 61 is driven to move in the first direction, the cutting member 61 can cut the connection position between the auxiliary piece body 44 and the connecting portion 41, so that the auxiliary piece body 44 is smoothly separated from the staple cartridge 2 and is stapled to the tissue, without causing traction on the tissue due to the connection between the auxiliary piece 4 and the stapler, and there is no need for the doctor to separate the auxiliary piece 4 from the stapler, which is beneficial to improving the surgical effect.

[0078] In order to further improve the smoothness of the separation between the auxiliary piece body 44 and the connecting portion 41 when the stapler is fired, a weak connection structure is formed at the connection position between the auxiliary piece body 44 and the connecting portion 41 of the auxiliary piece 4. The way to form a weak connection between the auxiliary piece body 44 and the connecting portion 41 can be that the thickness is thinned at the connection position between the auxiliary piece body 44 and the connecting portion 41, or a plurality of first cutting holes 45 are opened at the connection position between the auxiliary piece body 44 and the connecting portion 41 (such as Figure 4 and Figure 5 shown), the first cutting holes 45 are arranged at intervals, so that a point-break connection is formed at the connection position between the auxiliary piece body 44 and the connecting portion 41.

[0079] In this embodiment, the separation assembly further includes an elastic member 63 configured to provide a biasing force in the second direction to the driving member 62. In the initial state, before the stapler is fired, under the action of the elastic member 63, the cutting member and the driving member 62 are held at a lower position, so that the first side of the cutting member 61 is located inside the fitting groove 23 and does not protrude from the staple surface of the staple cartridge 2, preventing the cutting member from scratching the auxiliary sheet 4 and the tissue. When the stapler is fired, when the driving member 62 and the cutting member move in the first direction, the cutting member is pushed outwards and protrudes from the staple surface of the staple cartridge 2, thereby cutting the auxiliary sheet 4. At this time, the driving member 62 drives the elastic member 63 to undergo elastic deformation. In some embodiments, after firing is completed, under the action of the elastic deformation restoring force of the elastic member 63, the cutting member 61 returns to the lower position again.

[0080] In this embodiment, when the stapler is fired, the separation assembly is driven by the firing block 8 to complete the cutting of the auxiliary sheet 4. Specifically, after the firing block 8 moves from the proximal end to the distal end and abuts against the driving member 62, the firing block 8 continues to move in the distal direction, applying a driving force to the driving member 62, so that the driving member 62 drives the cutting member to move in the first direction. An inclined guiding surface 621 may be optionally provided at the proximal end of the driving member 62. The distal side of the guiding surface 621 is inclined in the second direction relative to the proximal side, so that when the firing block 8 drives the driving member 62, the driving force applied by the movement of the firing block 8 in the distal direction is converted into a force in the first direction.

[0081] Figures 10 - 12 In the figure, a structure in which a separation assembly is provided in one fitting groove 23 and no separation assembly is provided in the other fitting groove 23 is exemplarily shown for comparison. As Figures 8 - 12 shown, the axial width of the driving member 62 is greater than the axial width of the cutting member. The fitting groove 23 includes a first receiving groove 231 for receiving the cutting member and a second receiving groove 232 for receiving the driving member 62. The axial width of the second receiving groove 232 is greater than the axial width of the first receiving groove 231, that is, the shapes of the second receiving groove 232 and the first receiving groove 231 respectively match the shapes of the driving member 62 and the cutting member to define and guide the movement of the driving member 62 and the cutting member in the first direction. A stepped surface 233 is provided at the connection position between the second receiving groove 232 and the first receiving groove 231. Two ends of the elastic member 63 respectively abut against the stepped surface 233 and the elastic member mating portion 622 of the driving member 62. The elastic member 63 may, for example, be Figure 8 the spring shown, or other elastic structures such as an elastic pad or a spring sheet may also be used.

[0082] AsFigure 7 and Figure 8 As shown in Figure 8 , in this embodiment, the distal end and the proximal end of the auxiliary sheet body 44 are respectively provided with the connecting portions 41, and the number of the connecting portions 41 can be one, two or more. The separating assembly includes at least one first separating assembly provided at the proximal end of the staple cartridge 2 and at least one second separating assembly provided at the distal end of the staple cartridge 2. When the firing block 8 moves from the proximal end to the distal end of the staple cartridge 2, the first separating assembly and the second separating assembly are sequentially driven. The structures of the first separating assembly and the second separating assembly can be the same or similar. The first separating assembly is provided at the proximal side of the staple groove 21 at the nearest end, and the second separating assembly is provided at the distal side of the staple groove 21 at the farthest end, so that the auxiliary sheet body 44 can integrally cover all the staple grooves 21.

[0083] Here, in order to distinguish and illustrate the different working states of the two separating assemblies, different reference numerals are used to label the constituent structures of the first separating assembly and the second separating assembly in Figures 13 - 17 Specifically, the first separating assembly includes a first cutting member 61A, a first driving member 62A, and a first elastic member 63A. As shown in Figure 13 , a first guiding surface 621A is provided at the proximal end of the first driving member 62A. The first driving member 62A is provided with a first elastic member engaging portion 622A. A first elastic member 63A is provided between the first elastic member engaging portion 622A and the stepped surface inside the engaging groove 23 at the proximal end of the staple cartridge 2. The first driving member 62A is further provided with a first relief groove 623A opening towards the distal end to cooperate with the support post 26 of the staple cartridge 2 (shown in Figure 9 ). As shown in Figure 14 , the second separating assembly includes a second cutting member 61B, a second driving member 62B, and a second elastic member 63B. The proximal end of the second driving member 62B is provided with a second guiding surface 621B. The second driving member 62B is provided with a second elastic member engaging portion 622B. A second elastic member 63B is provided between the second elastic member engaging portion 622B and the stepped surface inside the engaging groove 23 at the distal end of the staple cartridge 2. The second driving member 62B is further provided with a second relief groove 623B opening towards the proximal end to cooperate with the support post 26 of the staple cartridge 2. The support post 26 can also play a role in guiding the movement of the first driving member 62A and the second driving member 62B in the first direction.

[0084] Figure 18 Figure 14 exemplarily shows the forms of the first cutting member 61A and the second cutting member 61B cutting the distal end and the proximal end of the auxiliary sheet body 44, but actually the cutting of the distal end and the proximal end of the auxiliary sheet body 44 by the first cutting member 61A and the second cutting member 61B is not carried out simultaneously. The following describes the cooperation process of the separating assembly and the firing block 8 during the firing of the stapler in combination with Figures 15 - 17 As shown in Figure 15 ​​As shown, in the initial state, i.e., before the stapler is fired, under the action of the first elastic member 63A and the second elastic member 63B, both the first separation assembly and the second separation assembly are in the lower position. The heights of the first side of the first cutting member 61A and the first side of the second cutting member 61B are both lower than the height of the staple cartridge surface, so that neither the first cutting member 61A nor the second cutting member 61B will contact the auxiliary piece 4. The auxiliary piece 4 is fixed to the staple cartridge surface of the staple cartridge 2 through the connecting portion 41. The firing block 8 is at the proximal side of the staple cartridge 2 and does not contact the first driving member 62A and the second driving member 62B.

[0085] When the stapler is fired, the firing block 8 can be driven to move in the distal direction through a push rod (not shown in the figure). As Figure 16 shown, when the firing block 8 moves to abut against the first guiding surface 621A of the first driving member 62A and continues to move in the distal direction, under the driving action of the firing block 8, the first driving member 62A drives the first cutting member 61A to move in the first direction, so that the first cutting member 61A moves outwards to cut the connection position between the auxiliary piece body 44 and the proximal connecting portion 41, causing the connection between the auxiliary piece body 44 and the proximal connecting portion 41 to be separated, and the first elastic member 63A is compressed to produce elastic deformation. As the firing block 8 continues to move in the distal direction and passes over the first separation assembly, the first separation assembly is no longer affected by the firing block 8. Under the action of the elastic deformation restoring force of the first elastic member 63A, the first driving member 62A and the first cutting member move in the second direction and return to the initial lower position. During the movement, the firing block 8 pushes the staples outwards through the pusher block 25, and the staples and the auxiliary piece body 44 are stapled to the tissue together. As Figure 17 shown, when the firing block 8 moves to abut against the second guiding surface 621B of the second driving member 62B and continues to move in the distal direction, the firing block 8 drives the second driving member 62B and the second cutting member 61B to move in the first direction. The second cutting member 61B cuts the connection position between the auxiliary piece body 44 and the distal connecting portion 41, so that the auxiliary piece body 44 can be separated from the staple cartridge 2 as a whole, while the connecting portion 41 is retained on the staple cartridge 2 under the magnetic adsorption of the first fixing portion 51 and the second fixing portion 52. After the operation is completed, the staple cartridge assembly and the anvil 3 can be taken out of the human body together.

[0086] Figure 19 and Figure 20 are schematic diagrams of the cooperation between the staple cartridge assembly and the auxiliary piece 4 in another embodiment of the present application. The difference between this embodiment and Figures 1 - 18 the embodiment is that the connection manner between the connecting portion 41 of the auxiliary piece 4 and the staple cartridge 2 is different. In this embodiment, the connecting portion 41 of the auxiliary piece 4 and the staple cartridge 2 are fixed through a Velcro connection structure 101. For example, the connecting portion 41 of the auxiliary piece 4 is provided with a hook surface or a fluff surface, while the surface of the staple cartridge 2 is provided with a fluff surface or a hook surface. AsFigure 20 As shown, during the firing of the stapler, the cutting member 61 can also be driven to move in the first direction to cut the connection position between the auxiliary sheet body 44 and the connecting portion 41, so that the auxiliary sheet body 44 is separated from the staple cartridge 2 and is stapled to the tissue, and the connecting portion 41 is retained on the surface of the staple cartridge 2 through the Velcro connection structure 101.

[0087] In the above embodiments, the extending direction of the fitting groove 23 is perpendicular to the extending direction of the staple groove 21, that is, perpendicular to the axial direction. In other alternative embodiments, the fitting groove can also be arranged parallel to the extending direction of the staple groove 21. The fitting groove can be arranged on both sides of the staple groove 21 at the farthest end and / or both sides of the staple cartridge 21 at the nearest end. Or, the staple groove 21 at the farthest end and / or the staple groove 21 at the nearest end can be directly used as the fitting groove, that is, the separating assembly is directly arranged inside the staple groove 21 at the farthest end and / or the staple groove 21 at the nearest end, which also belongs to the protection scope of the present application. When the fitting groove 23 is the staple groove 21 at the farthest end or the nearest end, or is the staple groove 21 at the farthest end or the nearest end increased along the direction of the staple groove 21, the driving member 62 can be arranged in the axial direction.

[0088] In the above embodiments, the first clamp is used as the anvil and the second clamp is used as the staple cartridge assembly for illustration. In other alternative embodiments, the first clamp can be the staple cartridge assembly and the second clamp can be the anvil, and the first fixing portion is arranged on the surface of the anvil, and the auxiliary sheet is adsorbed on the surface of the anvil, which also belongs to the protection scope of the present application.

[0089] The fixing manner of the connecting portion of the auxiliary sheet to the staple cartridge is not limited to the manner of the above embodiments. In other embodiments, the connecting portion of the auxiliary sheet and the staple cartridge surface of the staple cartridge can also be fixed by other means. For example, a plurality of through holes are formed in the connecting portion of the auxiliary sheet, a plurality of protrusions are arranged on the surface of the staple cartridge, and the protrusions and the through holes are fixed by fitting, or the connecting portion of the auxiliary sheet is directly fixed on the surface of the staple cartridge by pasting, etc., which all belong to the protection scope of the present application.

[0090] The above content is a further detailed description of the present application in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present application.

Claims

1. A nail head, characterized in that, Comprising: A first clamp; A second clamp, the second clamp including a first side surface opposite to the first clamp; An auxiliary piece located between the first clamp and the second clamp, the auxiliary piece including an auxiliary piece body and at least one connecting portion, the connecting portion being connected to the auxiliary piece body and fixed to the first side surface of the second clamp; At least one separating component movably disposed on the second clamp, the separating component including a cutting member, when the cutting member is driven to move in a first direction, a first side of the cutting member cuts a connection position between the auxiliary piece body and the connecting portion to separate the auxiliary piece body from the connecting portion, the first direction being a direction from the second clamp towards the first clamp.

2. The nail head according to claim 1, characterized in that, The second clamp is provided with a fitting groove for accommodating the separating component. In an initial state, the first side of the cutting member is located inside the fitting groove and does not protrude from the first side surface of the second clamp.

3. The nail head according to claim 2, characterized in that, A projection of the connection position between the auxiliary piece body and the connecting portion on the first side surface of the second clamp and a projection of the cutting member on the first side surface of the second clamp at least partially overlap.

4. The nail head according to claim 3, characterized in that, The connecting portion is provided at the distal end and / or proximal end of the auxiliary piece body, and the separating component is provided at the distal end and / or proximal end of the second clamp.

5. The nail head according to claim 4, characterized in that The second clamp is provided with a staple groove arranged along the axial direction of the staple head, and the fitting groove is parallel and / or perpendicular to the staple groove.

6. The nail head according to claim 4, characterized in that, When the fitting groove is parallel to the staple groove, the fitting groove is the staple groove located at the farthest end and / or the nearest end, and the separating component is arranged in the staple groove.

7. The nail head according to claim 4, characterized in that, The separating component further includes a driving member connected to a second side of the cutting member. The staple head further includes a firing block, at least a part of the firing block enters the second clamp. After the firing block moves from the proximal end to the distal end of the second clamp and abuts against the driving member, the firing block drives the cutting member to move in the first direction through the driving member.

8. The nail head according to claim 7, characterized in that, An inclined guiding surface is provided on the proximal side of the driving member. After the firing block moves from the proximal end to the distal end of the second clamp and abuts against the guiding surface, the firing block continues to move towards the distal side direction to drive the driving member to move in the first direction.

9. The nail head according to claim 7, characterized in that, The separating component further includes an elastic member configured to provide a biasing force to the driving member in a second direction opposite to the first direction.

10. The nail head according to claim 9, characterized in that, The axial width of the driving member is greater than the axial width of the cutting member. The second clamp is provided with a first receiving groove for accommodating the cutting member and a second receiving groove for accommodating the driving member. The axial width of the second receiving groove is greater than the axial width of the first receiving groove. A stepped surface is provided at the connecting position between the second receiving groove and the first receiving groove. Two ends of the elastic member respectively abut against the stepped surface and the driving member.

11. The nail head according to claim 7, wherein, The axial width of the first side of the cutting member is smaller than the axial width of the second side of the cutting member.

12. The nail head according to claim 7, characterized in that, At least one of the connecting parts is provided at the distal end and the proximal end of the auxiliary sheet body respectively. The separating assembly includes at least one first separating assembly provided at the proximal end of the second clamp and at least one second separating assembly provided at the distal end of the second clamp. When the firing block moves from the proximal end to the distal end of the second clamp, it drives the first separating assembly and the second separating assembly in sequence.

13. The nail head according to claim 12, wherein, The second clamp includes a plurality of staple grooves. The first separating assembly is provided on the proximal side of the staple groove at the nearest end, and the second separating assembly is provided on the distal side of the staple groove at the farthest end.

14. The nail head according to claim 1, characterized in that, A weak connection structure is formed at the connection position between the auxiliary sheet body of the auxiliary sheet and the connecting part.

15. The nail head according to claim 1, characterized in that, The connecting part of the auxiliary sheet and the first side surface of the second clamp are fixed by magnetic attraction, Velcro, fitting or pasting.

16. The nail head according to claim 1, characterized in that, The second clamp is provided with a cutter groove extending along the axial direction of the staple head. The auxiliary sheet includes a plurality of the connecting parts, and the plurality of the connecting parts are symmetrically arranged with respect to the cutter groove.

17. A surgical stapler, characterized in that, Including the staple head according to any one of claims 1 to 16.

Images