Separation component for surgical instrument and surgical instrument

Abstract

The present application relates to a separation assembly for surgical instruments and surgical instruments. The separation assembly includes an opening and closing spring sheet, a support member and a limiting assembly. The opening and closing spring sheet has an opening, can be opened or closed, and can be clamped from both sides of the anvil; the support member is connected to the opening of the opening and closing spring sheet; the limiting assembly is connected to the opening and closing spring sheet, and when the opening and closing spring sheet is in the closed state, the limiting assembly limits the relative position between the anvil and the opening and closing spring sheet from different directions. The opening and closing spring sheet in the separation assembly can clamp the anvil from both sides, and the limiting assembly is used to limit the relative position between the anvil and the opening and closing spring sheet from different directions, which greatly reduces the shaking of the separation assembly during use and improves the stability of tissue stripping; in addition, the separation assembly has a simple structure, which can greatly reduce the manufacturing cost and further reduce the overall cost of the surgical instrument.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments, and in particular to a separation component for surgical instruments and a surgical instrument. Background Art

[0002] When performing surgical procedures within the abdominal cavity, surgical instruments are relatively inflexible due to limited operating space. For example, when working with blood vessels, these vessels are often attached to other tissues. Cutting and suturing these vessels requires separating them from the surrounding tissues.

[0003] A separation component is connected to the distal end of the end effector to facilitate the doctor to separate the blood vessel from other tissues. However, after the operation of separating the blood vessel is completed, the separation component affects the cutting and suturing of other tissues.

[0004] Currently, the separation component is detachably connected to the end effector so that it can be removed after the blood vessel is stripped. However, after the detachable separation component is assembled on the end effector, there is a gap between the two and the tissue fluid has a lubricating effect. Therefore, there may be slight shaking during the use of the separation component, which affects the stability of the tissue (especially the blood vessel) stripping. Summary of the Invention

[0005] In view of this, embodiments of the present application provide a separation assembly for a surgical instrument and a surgical instrument to solve at least one problem existing in the background technology.

[0006] In a first aspect, an embodiment of the present application provides a separation assembly for a surgical instrument, the surgical instrument including an anvil, the separation assembly being detachably connected to a distal end of the anvil, the separation assembly comprising:

[0007] An opening and closing spring sheet having an opening, capable of opening or closing, and capable of clamping the anvil from both sides;

[0008] a support member connected to the opening of the opening and closing spring;

[0009] A limiting component is connected to the opening and closing spring piece. When the opening and closing spring piece is in a closed state, the limiting component limits the relative position between the anvil and the opening and closing spring piece from different directions.

[0010] In combination with the first aspect of the present application, in an optional embodiment, the opening and closing spring has a first spring and a second spring, one end of the first spring is connected to one end of the second spring, the other ends of the first spring and the second spring are free ends, the support member is connected to the second spring, and the first spring can be opened or closed relative to the support member.

[0011] In combination with the first aspect of the present application, in an optional embodiment, the second spring piece has a first connecting portion and a second connecting portion, the first connecting portion matches the support member and is connected to the support member, and the second connecting portion is used to match the pin seat.

[0012] In combination with the first aspect of the present application, in an optional embodiment, the second elastic piece is provided with a first clamping member, the support member is provided with a first clamping groove, and the first clamping member is clamped in the first clamping groove to connect the support member to the second elastic piece.

[0013] In combination with the first aspect of the present application, in an optional embodiment, the first spring piece has a third connecting portion and a fourth connecting portion, the third connecting portion is connected to the first connecting portion, and the fourth connecting portion is used to match the dowel seat.

[0014] In combination with the first aspect of the present application, in an optional embodiment, the third connecting portion is bent toward the nail magazine seat of the surgical instrument, and a first angle is formed between the plane where the third connecting portion is located and the plane where the fourth connecting portion is located, and the first angle is an obtuse angle.

[0015] In combination with the first aspect of the present application, in an optional embodiment, the limiting assembly includes a first limiting member and a second limiting member, one end of the first limiting member and the second limiting member are both connected to the first spring sheet, and when the opening and closing spring sheet is closed, the other end of the first limiting member is clamped to the support member, and the other end of the second limiting member is used to be inserted into the pin seat.

[0016] In conjunction with the first aspect of the present application, in an optional embodiment, the first limiting member is a second clamping member, and one end of the second clamping member is connected to the opening and closing spring piece;

[0017] The support member is provided with a second clamping groove, and when the opening and closing elastic piece is in a closed state, the second clamping member is clamped in the second clamping groove.

[0018] In combination with the first aspect of the present application, in an optional embodiment, the support member is provided with a guide groove, and the second clamping member moves in the guide groove during the process of the opening and closing spring sheet changing from the open state to the closed state.

[0019] In combination with the first aspect of the present application, in an optional embodiment, the second limiting member is a snap-in protrusion connected to the side of the opening and closing spring piece close to the support member, and the snap-in protrusion is used to be inserted into the first snap-in through hole of the pin holder that matches the snap-in protrusion.

[0020] In a second aspect, an embodiment of the present application provides a surgical instrument, comprising a separation assembly for a surgical instrument according to any embodiment provided in the first aspect.

[0021] The embodiment of the present application provides a separation component for surgical instruments, in which the opening and closing spring pieces can clamp the anvil from both sides, and utilize a limiting component to limit the relative position between the anvil and the opening and closing spring pieces from different directions, thereby greatly reducing the shaking of the separation component during use and improving the stability of tissue stripping; in addition, the separation component has a simple structure, which can greatly reduce the manufacturing cost and further reduce the overall cost of the surgical instrument.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 A schematic diagram of the overall structure of the surgical instrument provided in an embodiment of the present application;

[0025] Figure 2a A schematic diagram of a separation assembly for a surgical instrument provided in an embodiment of the present application, which is inserted into an anvil, with the opening and closing spring in an open state;

[0026] Figure 2b A schematic diagram of a state where a separation assembly for a surgical instrument provided in an embodiment of the present application is assembled on an anvil;

[0027] Figure 3 A schematic diagram of the three-dimensional structure of an opening and closing spring piece used in a separation assembly of a surgical instrument provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the three-dimensional structure of a support member used in a separation assembly of a surgical instrument provided in an embodiment of the present application;

[0029] Figure 5a A cross-sectional view of a separation assembly for a surgical instrument provided in an embodiment of the present application in an open state;

[0030] Figure 5b A cross-sectional view of a separation assembly for a surgical instrument provided in an embodiment of the present application in a closed state;

[0031] Figure 6a A schematic diagram of the three-dimensional structure of a separation assembly for a surgical instrument provided in an embodiment of the present application in an open state;

[0032] Figure 6bA schematic diagram of a portion of the structure of an anvil in a surgical instrument provided in an embodiment of the present application;

[0033] Figure 7 for Figure 6a Cross-section at AA in the middle;

[0034] Figure 8 A schematic diagram of the three-dimensional structure of a disassembly and assembly device for a surgical instrument provided in an embodiment of the present application and equipped with an anvil;

[0035] Figure 9 A schematic diagram of the structural decomposition of the disassembly and assembly device, the separation assembly, and the anvil for a surgical instrument provided in an embodiment of the present application;

[0036] Figure 10 A schematic diagram of a state in which a disassembly and assembly device for a surgical instrument according to an embodiment of the present application is assembling a separation component and an anvil;

[0037] Figure 11 A schematic diagram of another state of assembling a separation component and an anvil by the disassembly and assembly device for a surgical instrument provided in an embodiment of the present application;

[0038] Figure 12 A schematic diagram of the disassembly and assembly device for surgical instruments provided in an embodiment of the present application after the separation assembly and the anvil are disassembled;

[0039] Figure 13 for Figure 11 Cross-sectional view at the middle BB.

[0040] Reference numerals:

[0041] 1. End effector; 11. Jaw assembly; 111. Nail cartridge seat; 112. Anvil seat; 1121. Insertion slot; 1122. First engaging hole; 12. Nail cartridge assembly;

[0042] 2. Separate components;

[0043] 21, opening and closing spring; 211, first spring; 2111, third connecting portion; 2112, fourth connecting portion; 212, second spring; 2121, first connecting portion; 2122, second connecting portion; 2123, first clamping member; 2124, second clamping hole; 21a, opening;

[0044] 22. Support member; 221. First clamping groove; 222. Second clamping groove; 223. Guide groove; 224. Insertion portion; 2241. Avoidance notch;

[0045] 23. Limiting assembly; 231. First limiting member; 2311. Second clamping member; 232. Second limiting member; 2321. Clamping protrusion;

[0046] 3. Disassembly and assembly device;

[0047] 31. Base; 311. First accommodating groove; 312. First through groove; 3121. First portion; 3122. Second portion;

[0048] 32. Moving assembly; 321. First moving member; 322. Second moving member; 3221. First guide rail groove;

[0049] 33. Disassembly assembly; 331. Third moving member; 3311. Boss; 332. Elastic member;

[0050] 4. Casing assembly; 5. Handle assembly. DETAILED DESCRIPTION

[0051] To make the technical solutions and beneficial effects of the present invention more clearly understood, the following detailed description is given by way of specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly illustrate the details of the local features. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0052] In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplifying the description of the present invention, and do not indicate that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and should not be understood as a limitation to the present invention.

[0053] In this disclosure, the terms "first" and "second" are used solely for descriptive purposes and should not be construed as indicating the relative importance of the features indicated or the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, and "several" means at least one, such as one, two, or three, unless otherwise specifically defined.

[0054] In the present invention, unless otherwise expressly defined, the terms "installed," "connected," "connect," "fixed," and "disposed" should be understood broadly. For example, "connection" can mean fixed, removable, or integrated; it can mean mechanical or electrical; it can mean direct or indirect connection through an intermediary; it can also mean internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0055] In the present invention, unless otherwise clearly defined, when a first feature is “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature, the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in indirect contact via an intermediate medium. Moreover, when a first feature is “on,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0056] Please refer to Figure 1 , Figure 1 The overall structure diagram of the surgical instrument provided in the embodiment of the present application is shown in FIG. The surgical instrument provided in the embodiment of the present application is a stapler, which is a commonly used minimally invasive surgical instrument. The following embodiments are described using a stapler as an example.

[0057] The anastomosis device includes an end actuator 1, a transmission assembly (not shown in the figure), a drive assembly (not shown in the figure), a sleeve assembly 4 and a handle assembly 5. The two ends of the sleeve assembly 4 are respectively connected to the end actuator 1 and the handle assembly 5. The drive assembly is installed on the handle assembly 5. One end of the transmission assembly is connected to the drive assembly, and the other end is connected to the end actuator 1.

[0058] Specifically, the end effector 1 includes a jaw assembly 11 and a staple cartridge assembly 12. The jaw assembly 11 includes a staple cartridge seat 111 and an anvil 112 pivotally connected to the staple cartridge seat 111. The staple cartridge seat 111 is configured to operably support the staple cartridge assembly 12 therein. The anvil 112 has a selective open position and a closed position. Under the transmission action of the transmission assembly, the anvil 112 cooperates with the staple cartridge seat 111 and the staple cartridge assembly 12 to clamp or loosen tissue.

[0059] The end actuator 1 also includes a cutting knife (not shown in the figure). When the nail support 112 cooperates with the nail magazine seat 111 and the nail magazine assembly 12 to clamp the biological tissue, under the driving force of the motor assembly, the transmission assembly drives the cutting knife to cut the tissue.

[0060] It should be noted that the transmission assembly includes multiple transmission mechanisms, which can respectively drive the cutting knife, the nail holder 112 and other components to perform actions. The specific implementation principle of this part is described in detail in the relevant patents and will not be elaborated here.

[0061] It should also be noted that the distal end in the embodiment of the present application is the end of the surgical instrument away from the handle assembly 5, and the proximal end is the end of the surgical instrument close to the handle assembly 5.

[0062] Related Art: During surgical procedures, it is often necessary to dissect tissue, particularly to separate blood vessels from other tissues. Currently, a separation assembly 2 is detachably connected to an anvil 112 to facilitate tissue dissectability. However, most separation assemblies 2 are connected to the anvil 112 via a plug-in connection. This creates a gap between the separation assembly 2 and the anvil 112, and tissue fluid acts as a lubricant. This creates a slight wobble during the use of the separation assembly 2, affecting the stability of tissue dissectability.

[0063] Based on this, an embodiment of the present application provides a separation component for surgical instruments, in which the opening and closing spring pieces 21 in the separation component 2 can clamp the anvil 112 from both sides thereof, and utilize the limiting component 23 to limit the relative position between the anvil 112 and the opening and closing spring pieces 21 from different directions, thereby greatly reducing the shaking of the separation component 2 during use and improving the stability of tissue stripping; in addition, the structure of the separation component 2 is simple, which can greatly reduce the manufacturing cost and further reduce the overall cost of the surgical instrument.

[0064] Specifically, if Figures 2a to 4 As shown, the separation assembly 2 includes an opening and closing spring piece 21, a support member 22 and a limiting assembly 23, wherein the opening and closing spring piece 21 has an opening 21a, and the opening and closing spring piece 21 can be opened or closed, and the opening 21a of the opening and closing spring piece 21 faces the anvil seat 112, and can clamp the anvil seat 112 from both sides. The support member 22 is connected to the opening 21a of the opening and closing spring piece 21 to support the opening and closing spring piece 21 and to limit the minimum opening size of the opening and closing spring piece 21. The limiting assembly 23 is connected to the opening and closing spring piece 21. When the opening and closing spring piece 21 is in the closed state, the limiting assembly 23 limits the relative position between the anvil seat 112 and the opening and closing spring piece 21 from different directions.

[0065] It can be understood that the limiting component 23 can limit the relative position between the opening and closing spring piece 21 and the support member 22 and the nail seat 112. At the same time, clamping the opening and closing spring piece 21 from both sides of the nail seat 112 can further improve the connection stability and firmness of the opening and closing spring piece 21 and the support member 22 and the nail seat 112, and can greatly reduce the shaking of the separation component 2 assembled on the nail seat 112 during use.

[0066] Please refer to Figure 2a 、 Figure 3 and Figure 4 The opening and closing spring piece 21 has a first spring piece 211 and a second spring piece 212. One end of the first spring piece 211 is connected to one end of the second spring piece 212. The other ends of the first spring piece 211 and the second spring piece 212 are free ends. The support member 22 is connected to the second spring piece 212. The first spring piece 211 can be opened or closed relative to the support member 22.

[0067] The opening and closing spring 21 is shaped like an eagle's beak. The support member 22 is connected to the second spring 212. The first spring 211 can rotate relative to the support member 22 and the second spring 212 to open or close the opening and closing spring 21. The opening and closing spring 21 is made of metal and formed by a bending process. That is, the first spring 211 and the second spring 212 are integrally formed, ensuring the structural strength of the connection between the first spring 211 and the second spring 212.

[0068] The closed state of the opening and closing spring piece 21 in the embodiment of the present application refers to the state in which the first spring piece 211 rotates to contact the support member 22, that is, the state in which there is a minimum opening between the first spring piece 211 and the second spring piece 212. It can also be understood as the state in which the first spring piece 211 and the second spring piece 212 are clamped on both sides of the pin seat 112.

[0069] Figure 2a It shows a schematic diagram in which the separation assembly 2 is inserted into the anvil 112 and the first elastic piece 211 is in an open state relative to the support member 22 .

[0070] Figure 2b The schematic diagram shows the state where the separation component 2 is assembled on the anvil 112 , that is, the first elastic piece 211 is in a closed state relative to the support member 22 and the second elastic piece 212 .

[0071] Figure 5a The schematic diagram of the opening and closing elastic piece 21 in the open state is shown. In the embodiment of the present application, the opening and closing elastic piece 21 in the open state means that the first elastic piece 211 is away from the support member 22.

[0072] Figure 5b FIG. 1 is a schematic diagram showing the opening and closing elastic piece 21 in a closed state.

[0073] In an optional embodiment, the limiting assembly 23 includes a first limiting member 231 and a second limiting member 232. One end of the first limiting member 231 and the second limiting member 232 are both connected to the first spring plate 211. When the opening and closing spring plate 21 is in a closed state, the other end of the first limiting member 231 is clamped on the support member 22, and the other end of the second limiting member 232 is used to be inserted into the pin seat 112.

[0074] It can be understood that during the operation, when it is necessary to install the separation component 2 at the end of the nail seat 112 to use it to separate the tissue, an external force acts on the first spring piece 211 and causes the first spring piece 211 to rotate toward the support member 22 and the second spring piece 212, driving the first limiting member 231 and the second limiting member 232 to move, and causing the first limiting member 231 to be clamped on the support member 22, and the second limiting member 232 to be inserted into the nail seat 112, thereby realizing the assembly of the separation component 2 and the nail seat 112.

[0075] The first limit member 231 is clamped on the support member 22, which can limit the opening size of the first spring piece 211 and the second spring piece 212, and then the first spring piece 211 and the second spring piece 212 can be clamped from both sides of the anvil seat 112, greatly increasing the contact area between the opening and closing spring piece 21 and the anvil seat 112, so that the separation component 2 can withstand external force together with the anvil seat 112 during use, greatly reducing the shaking phenomenon of the separation component 2.

[0076] The first limiting member 231 limits the relative position between the first elastic piece 211 and the second elastic piece 212 in a direction perpendicular to the plane where the first elastic piece 211 is located; the second limiting member 232 limits the relative position between the first elastic piece 211 and the anvil seat 112 in the axial direction of the anvil seat 112. The first limiting member 231 and the second limiting member 232 respectively limit the relative position of the opening and closing elastic piece 21 and the anvil seat 112 from different directions, thereby ensuring the firmness and stability of the connection between the opening and closing elastic piece 21 and the anvil seat 112.

[0077] Specifically, the first limiting member 231 is a second clamping member 2311, one end of which is connected to the opening and closing spring 21. The support member 22 has a second clamping groove 222, and the second clamping member 2311 is clamped in the second clamping groove 222 when the opening and closing spring 21 is closed.

[0078] Furthermore, the second engaging member 2311 is a metal sheet and a hook is formed at the end of the metal sheet. The hook can be engaged in the second engaging groove 222 .

[0079] In an alternative embodiment, if Figure 3 、 Figure 4 、 Figure 5a and Figure 6bAs shown, the support member 22 is provided with a guide groove 223. When the opening and closing spring piece 21 is in the open state, the second clamping member 2311 is located in the guide groove 223. During the process of the opening and closing spring piece 21 transitioning from the open state to the closed state, the second clamping member 2311 moves in the guide groove 223 and is deformed. When the hook moves to the position corresponding to the second clamping groove 222, the hook moves into the second clamping groove 222 under the elastic force of the second clamping member 2311. Under the matching action of the second clamping member 2311 and the second clamping groove 222, the opening and closing spring piece 21 is closed, and the first and second clamping members 211, 212 can be clamped from both sides of the anvil 112.

[0080] Furthermore, the guide groove 223 matches the second clamping member 2311 , and the guide groove 223 can be used to limit the rotation direction of the first elastic piece 211 , thereby greatly reducing the possibility of the first elastic piece 211 being deflected during the closing process.

[0081] In an optional embodiment, the second limiting member 232 is a snap-fit ​​protrusion 2321 connected to the side of the opening and closing spring piece 21 close to the support member 22 , and the snap-fit ​​protrusion 2321 is used to be inserted into the first snap-fit ​​through hole 1122 of the anvil 112 .

[0082] Furthermore, a snap-fit ​​protrusion 2321 is provided on one side of the first spring piece 211 adjacent to the second spring piece 212. The number of snap-fit ​​protrusions 2321 is determined based on actual needs and is not limited in this embodiment. When the first spring piece 211 is forced to move toward the second spring piece 212, the snap-fit ​​protrusion 2321 is inserted into a first snap-fit ​​through hole 1122 of the anvil 112, which matches the snap-fit ​​protrusion 2321.

[0083] Furthermore, the second spring piece 212 is provided with a second snap-in hole 2124 matching the first snap-in hole 1122 and the snap-in protrusion 2321. When the snap-in protrusion 2321 is inserted into the first snap-in hole 1122, it is also inserted into the second snap-in hole 2124 located on the side of the pin seat 112 to improve the connection stability and firmness between the opening and closing spring piece 21 and the pin seat 112.

[0084] In an alternative embodiment, if Figure 6a and Figure 6b As shown, the support member 22 is provided with an inserting portion 224, and a partial area of ​​the support member 22 at one end close to the pin seat 112 is extended to form the inserting portion 224. The end of the pin seat 112 is provided with an inserting groove 1121 matching the inserting portion 224. The inserting portion 224 is inserted into the inserting groove 1121 to achieve preliminary matching of the opening and closing spring piece 21 and the pin seat 112.

[0085] It can be understood that after the plug-in portion 224 is inserted into the plug-in slot 1121, the initial positioning of the opening and closing spring piece 21 and the anvil seat 112 can be achieved, and then an external force is applied to the first spring piece 211 to close the opening and closing spring piece 21, thereby achieving the limitation of the relative position of the opening and closing spring piece 21 and the anvil seat 112; in addition, the separation component 2 is not only inserted into the interior of the anvil seat 112 but also clamped to the outer wall of the anvil seat 112, thereby ensuring the connection stability between the separation component 2 and the anvil seat 112.

[0086] In an optional embodiment, the plug-in portion 224 is provided with a relief portion positioned opposite the engaging protrusion 2321. The relief portion is a relief through-hole, and the engaging protrusion 2321 is inserted into the relief through-hole, the first engaging through-hole 1122, and the second engaging through-hole 2124. This improves the connection strength between the separation assembly 2 and the anvil 112. Alternatively, the relief portion is a relief notch 2241, and the engaging protrusion 2321 is inserted into the first engaging through-hole 1122 and the second engaging through-hole 2124, and abuts against the relief notch 2241, thereby facilitating the removal of the separation assembly 2.

[0087] In an alternative embodiment, if Figure 3 and Figure 5a As shown, the second elastic piece 212 has a first connecting portion 2121 and a second connecting portion 2122 . The first connecting portion 2121 matches the support member 22 and is connected to the support member 22 . The second connecting portion 2122 is used to match the anvil 112 .

[0088] It can be understood that the support member 22 is connected to the first connection portion 2121 of the second elastic piece 212, and the first connection portion 2121 is connected to the first elastic piece 211. The second connection portion 2122 corresponds to the plug portion 224 and the distal end of the anvil 112 and is located outside the anvil 112.

[0089] The shape of the second connecting portion 2122 matches the outer shape of the nail seat 112, so that the second connecting portion 2122 can abut against the outer wall of the nail seat 112.

[0090] In an alternative embodiment, if Figure 3 and Figure 7 As shown, the second elastic piece 212 is provided with a first clamping member 2123 , the support member 22 is provided with a first clamping groove 221 , and the first clamping member 2123 is clamped in the first clamping groove 221 to connect the support member 22 to the second elastic piece 212 .

[0091] Furthermore, the second elastic piece 212 is provided with two oppositely arranged first clamping members 2123 , and the support member 22 is similarly provided with a first clamping groove 221 matching the two first clamping members 2123 to ensure the firmness and stability of the clamping between the support member 22 and the second elastic piece 212 .

[0092] In an alternative embodiment, if Figure 5a As shown, the first elastic piece 211 has a third connecting portion 2111 and a fourth connecting portion 2112 . The third connecting portion 2111 is connected to the first connecting portion 2121 , and the fourth connecting portion 2112 is used to match the dowel seat 112 .

[0093] Specifically, the first limiting member 231 is connected to the third connection portion 2111 , and the second limiting member 232 is connected to the fourth connection portion 2112 .

[0094] In an optional embodiment, the third connecting portion 2111 is bent toward the nail magazine seat 111 of the surgical instrument, and a first angle is formed between the plane where the third connecting portion 2111 is located and the plane where the fourth connecting portion 2112 is located, that is, Figure 5a The angle a shown in FIG is an obtuse angle. Similarly, a second angle is formed between the plane where the first connecting portion 2121 is located and the plane where the second connecting portion 2122 is located, and the second angle is also an obtuse angle.

[0095] The third connecting portion 2111 is bent relative to the fourth connecting portion 2112 toward the nail magazine seat 111, and the first angle formed between the third connecting portion 2111 and the fourth connecting portion 2112 is an obtuse angle, which can facilitate tissue separation and further improve the smoothness and safety of the operation.

[0096] When the separation component 2 is assembled on the nail seat 112, it can be convenient for the doctor to peel off the tissue during the operation. However, after the peeling operation is completed, the separation component 2 may affect the cutting and suturing operations of surgical instruments on other tissues.

[0097] Based on this, an embodiment of the present application provides a disassembly and assembly device for surgical instruments. The disassembly and assembly device 3 can not only improve the disassembly and assembly efficiency of the separation component 2 and the nail seat 112, but also ensure the assembly effect of assembling the separation component 2 on the nail seat 112.

[0098] Specifically, if Figure 8 and Figure 9 As shown, an assembly and disassembly device 3 for surgical instruments provided in an embodiment of the present application includes a base 31, a moving assembly 32, and a disassembly assembly 33, wherein the base 31 has a first receiving groove 311 for receiving the opening and closing spring piece 21 and a first through groove 312 connected to the first receiving groove 311. The moving assembly 32 is movably connected to the base 31, and the moving assembly 32 includes a first moving member 321, which matches the first through groove 312. The first moving member 321 moves along the first through groove 312 under the action of an external force and can change the opening and closing spring piece 21 from an open state to a closed state. When the opening and closing spring piece 21 is in the closed state, the engaging protrusion 2321 on the opening and closing spring piece 21 is inserted into the anvil seat 112.

[0099] Figure 10 3 is a schematic diagram showing the state of the opening and closing elastic piece 21 and the disassembling and assembling device 3 in the open state, that is, a schematic diagram showing the state before the first moving member 321 acts on the opening and closing elastic piece 21.

[0100] Figure 11 3 is a schematic diagram showing the state of the opening and closing elastic piece 21 and the disassembling and assembling device 3 in a closed state, that is, a schematic diagram showing the state after the first moving member 321 acts on the opening and closing elastic piece 21.

[0101] It can be understood that when the first moving member 321 moves along the first through groove 312 under the action of external force, the first moving member 321 acts on the first elastic piece 211 and causes the first elastic piece 211 to rotate toward the second elastic piece 212, thereby causing the opening and closing elastic piece 21 to change from an open state to a closed state. When the opening and closing elastic piece 21 is in the closed state, the snap-fitting protrusion 2321 on the opening and closing elastic piece 21 matches the first snap-fitting through hole 1122 on the anvil seat 112 and the second snap-fitting through hole 2124 on the second elastic piece 212, thereby realizing the assembly and disassembly device 3 for assembling the separation component 2 on the anvil seat 112.

[0102] The disassembly component 33 is used to disengage the separation component 2 from the anvil 112, thereby preventing the separation component 2 from affecting the cutting and suturing operations of other tissues during subsequent surgical procedures.

[0103] Specifically, the disassembly component 33 is movably connected to the base 31 , and the position of the disassembly component 33 is opposite to the first accommodating groove 311 . Under the action of external force, the disassembly component acts on the opening and closing spring piece 21 and causes the opening and closing spring piece 21 to detach from the pin seat 112 .

[0104] The above disassembly and assembly device 3 is simple to operate and can greatly improve the assembly efficiency of assembling the separation component 2 on the nail seat 112, as well as the disassembly efficiency of detaching the separation component 2 from the nail seat 112, while also ensuring the assembly effect.

[0105] In an optional embodiment, the moving assembly 32 further includes a second moving member 322 movably connected to the base 31 and connected to the first moving member 321 . The second moving member 322 drives the first moving member 321 to move synchronously.

[0106] The second movable member 322 is connected to the top of the base 31 for easy operation by the operator. The second movable member 322 drives the first movable member 321 to move synchronously, which not only improves the convenience of operation but also saves time and effort for the operator.

[0107] The second moving member 322 is a slider sleeved on the base 31 , and an anti-slip groove is provided on the upper surface of the slider to further improve the operation efficiency.

[0108] Furthermore, the second moving member 322 is provided with a first guide groove 3221, and the first guide groove 3221 matches the first moving member 321 in the first direction; in the second direction, the first moving member 321 can move along the first guide groove 3221. Figure 8 The x-axis direction in the coordinate system shown in FIG; the second direction, that is, Figure 8 The z-axis direction in the coordinate system shown in FIG; the axis direction of the first moving member 321, that is, Figure 8 The y-axis direction in the coordinate system shown in .

[0109] It can be understood that the first moving member 321 can only move along the second direction in the first guide groove 3221 , and in the second direction, the size of the first moving member 321 matches the size of the first guide groove 3221 , so the first moving member 321 cannot move along the first direction in the first guide groove 3221 .

[0110] In an optional embodiment, the first through slot 312 has a first portion 3121 and a second portion 3122 . Before the separation assembly 2 is assembled on the anvil 112 , the first moving member 321 is placed in the first portion 3121 , and the second portion 3122 corresponds to the first accommodating slot 311 .

[0111] When the separation component 2 needs to be assembled on the nail seat 112, the first moving member 321 is moved from the first part 3121 of the first through groove 312 to the second part 3122 under the drive of the second moving member 322, and can act on the first spring piece 211, thereby making the first spring piece 211 inserted into the nail seat 112, and the first limiting member 231 is clamped in the first clamping groove 221.

[0112] In an alternative embodiment, if Figure 9 、 Figure 12 and Figure 13 As shown, the disassembly assembly 33 includes a third movable member 331, which is accommodated in a second accommodating groove (not shown) provided in the base 31 and is movable within the second accommodating groove. When it is necessary to disengage the separation assembly 2 from the anvil 112, the third movable member 331 is used to act on the separation assembly 2 and disengage the separation assembly 2 from the anvil 112.

[0113] Furthermore, the third movable member 331 is provided with a plurality of bosses 3311 corresponding to the first latching through hole 1122 and the latching protrusion 2321. The bosses 3311 act on the latching protrusion 2321 and cause the latching protrusion 2321 to disengage from the first latching through hole 1122 and the second latching through hole 2124, thereby enabling the separation component 2 to disengage from the pin seat 112.

[0114] It should be noted that when the engaging protrusion 2321 of the first elastic piece 211 is disengaged from the anvil 112, the fourth connecting portion 2112 of the first elastic piece 211 bends and deforms relative to the third connecting portion 2111. When the engaging protrusion 2321 of the first elastic piece 211 is disengaged from the anvil 112, the second engaging member 2311 of the first position-limiting member 231 remains engaged with the second engaging groove 222 of the support member 22. Because this surgical instrument is disposable, there is no need to disengage the second engaging member 2311 from the second engaging groove 222, thereby reducing the complexity of operating the surgical instrument.

[0115] Figure 12 , which shows a state in which the engaging protrusion 2321 of the first elastic piece 211 is disengaged from the anvil 112 under the action of the boss 3311 , and the fourth connecting portion 2112 of the first elastic piece 211 is bent and deformed relative to the third connecting portion 2111 .

[0116] In an optional embodiment, the disassembly assembly 33 further includes an elastic member 332, one end of which is connected to the base 31 and the other end is connected to the third movable member 331. When the separation assembly 2 is disengaged from the anvil 112 under the action of the third movable member 331, the third movable member 331 can move toward the original position under the elastic force of the elastic member 332. The elastic member 332 is a compression spring, but is not limited to this.

[0117] The separation assembly 2 is assembled on the anvil 112 using the disassembly and assembly device 3, including the following steps:

[0118] The separation assembly 2 is placed in the first receiving groove 311 of the base 31 , and the insertion portion 224 of the separation assembly 2 is inserted into the anvil 112 .

[0119] Push the second moving member 322 along Figure 10 The second moving member 322 moves in the direction of the arrow s1 shown in FIG. 3 , and the first moving member 321 moves. Under the action of the first moving member 321, the separation assembly 2 is assembled on the anvil seat 112.

[0120] The separation assembly 2 is disassembled from the anvil 112 using the disassembly device 3, including the following steps:

[0121] The separation assembly 2 is placed in the first receiving groove 311 of the base 31 .

[0122] The external force acts on the third moving member 331 and causes the third moving member 331 to move along Figure 12 The third movable member 331 moves in the direction of the arrow s2 shown in FIG, and the boss 3311 of the third movable member 331 acts on the engaging protrusion 2321 of the first elastic piece 211, and can make the engaging protrusion 2321 disengage from the anvil seat 112. In this state, the anvil seat 112 can be taken out from the separation assembly 2.

[0123] The embodiment of the present application also provides a surgical instrument, including the disassembly and assembly device for the surgical instrument provided by any of the above embodiments and the separation assembly for the surgical instrument provided by any of the above embodiments. The separation assembly 2 has a simple structure, which can reduce the production cost and further reduce the overall cost of the surgical instrument. The opening and closing spring pieces 21 in the separation assembly 2 can clamp the anvil 112 from both sides thereof, and the limiting assembly 23 can limit the relative position of the anvil 112 and the separation assembly 2 from different directions, which can greatly reduce the shaking phenomenon of the separation assembly 2 during use and ensure the stability of the surgical instrument in tissue peeling. The disassembly and assembly device 3 can not only improve the disassembly and assembly efficiency of the separation assembly 2 and the anvil 112, but also ensure the assembly effect of the separation assembly 2 on the anvil 112, further improving the smoothness of the use of the surgical instrument during surgery.

[0124] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present application and do not limit the scope of protection of the patent application.

Claims

1. A separation assembly for a surgical instrument, characterized in that The surgical instrument comprises an anvil (112), the separation assembly (2) being detachably connected to the distal end of the anvil (112), the separation assembly (2) comprising: An opening and closing spring (21) has an opening, can be opened or closed, and can clamp the anvil (112) from both sides thereof; A support member (22) connected to the opening of the opening and closing spring (21); A limiting assembly (23) is connected to the opening and closing spring piece (21), and when the opening and closing spring piece (21) is in a closed state, the limiting assembly (23) limits the relative position between the anvil seat (112) and the opening and closing spring piece (21) from different directions; The opening and closing spring (21) comprises a first spring (211) and a second spring (212), one end of the first spring (211) is connected to one end of the second spring (212), the other ends of the first spring (211) and the second spring (212) are free ends, the support member (22) is connected to the second spring (212), and the first spring (211) can be opened or closed relative to the support member (22).

2. The separation assembly for surgical instruments according to claim 1, wherein: The second elastic piece (212) has a first connecting portion (2121) and a second connecting portion (2122), wherein the first connecting portion (2121) matches the support member (22) and is connected to the support member (22), and the second connecting portion (2122) is used to match the anvil seat (112).

3. The separation assembly for surgical instruments according to claim 2, wherein: The second spring piece (212) is provided with a first clamping piece (2123), the support piece (22) is provided with a first clamping groove (221), and the first clamping piece (2123) is clamped in the first clamping groove (221) so that the support piece (22) is connected to the second spring piece (212).

4. The separation assembly for surgical instruments according to claim 3, wherein: The first elastic piece (211) has a third connecting portion (2111) and a fourth connecting portion (2112), the third connecting portion (2111) is connected to the first connecting portion (2121), and the fourth connecting portion (2112) is used to match the anvil (112).

5. The separation assembly for surgical instruments according to claim 4, characterized in that The third connecting portion (2111) is bent toward the nail magazine seat of the surgical instrument, and a first angle is formed between the plane where the third connecting portion (2111) is located and the plane where the fourth connecting portion (2112) is located, and the first angle is an obtuse angle.

6. The separation assembly for surgical instruments according to claim 1, wherein: The limiting assembly (23) includes a first limiting member (231) and a second limiting member (232), one end of each of the first limiting member (231) and the second limiting member (232) is connected to the first spring plate (211), and when the opening and closing spring plate (21) is closed, the other end of the first limiting member (231) is clamped to the support member (22), and the other end of the second limiting member (232) is used to be inserted into the anvil seat (112).

7. The separation assembly for surgical instruments according to claim 6, characterized in that The first limiting member (231) is a second clamping member (2311), and one end of the second clamping member (2311) is connected to the opening and closing spring (21); The support member (22) is provided with a second clamping groove (222), and when the opening and closing spring piece (21) is in a closed state, the second clamping member (2311) is clamped in the second clamping groove (222).

8. The separation assembly for surgical instruments according to claim 7, wherein: The support member (22) is provided with a guide groove (223), and during the process of the opening and closing elastic piece (21) changing from an open state to a closed state, the second clamping member (2311) moves in the guide groove (223).

9. The separation assembly for surgical instruments according to claim 6, characterized in that: The second limiting member (232) is a snap-fitting protrusion (2321) connected to the side of the opening and closing spring (21) close to the support member (22), and the snap-fitting protrusion (2321) is used to be inserted into a first snap-fitting through hole (1122) of the anvil seat (112) that matches the snap-fitting protrusion (2321).

10. A surgical instrument, characterized in that: A separation assembly for a surgical instrument comprising the method according to any one of claims 1 to 9.

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