Separating assembly for surgical instrument and surgical instrument

Abstract

The invention relates to a separation assembly for a surgical instrument and the surgical instrument. Wherein the separating assembly comprises an opening and closing elastic piece, a supporting piece and a limiting assembly, and the opening and closing elastic piece is provided with an opening, can be opened or closed and can clamp the nail abutting base from the two sides of the nail abutting base; the supporting piece is connected into the opening of the opening and closing elastic piece. The limiting assembly is connected to the opening and closing elastic piece, and when the opening and closing elastic piece is in a closed state, the limiting assembly limits the relative position between the nail abutting base and the opening and closing elastic piece in different directions. The opening and closing elastic piece in the separation assembly can clamp the nail abutting base from the two sides of the nail abutting base, the limiting assembly is used for limiting the relative position between the nail abutting base and the opening and closing elastic piece in different directions, the shaking phenomenon existing in the using process of the separation assembly is greatly reduced, and the stability of tissue stripping is improved; in addition, the separating assembly is simple in structure, the manufacturing cost can be greatly reduced, and the overall cost of the surgical instrument is further reduced.

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 surgical instruments are used in the abdominal cavity, they are not as flexible due to the limited operating space. For example, when dealing with blood vessels, blood vessels are usually attached to other tissues. When cutting and suturing blood vessels, they need to be peeled off from other tissues.

[0003] A separation component is connected to the distal end of the end effector, which can facilitate the doctor to peel the blood vessel from other tissues. However, after the operation of peeling 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 actuator so that it can be removed after the blood vessel is stripped. However, after the detachable separation component is assembled on the end actuator, there may be slight shaking during the use of the separation component because there is a gap between the two and the tissue fluid has a lubricating effect, which affects the stability of the tissue (especially the blood vessel) stripping. Summary of the invention

[0005] In view of this, the 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, wherein the surgical instrument includes a nail support, and the separation assembly is detachably connected to the distal end of the nail support, and the separation assembly includes: An opening and closing spring sheet, which has an opening and can be opened or closed, and can clamp the anvil from both sides thereof; A support member connected to the opening of the opening and closing spring sheet; A limiting component is connected to the opening and closing spring sheet. When the opening and closing spring sheet is in a closed state, the limiting component limits the relative position between the anvil seat and the opening and closing spring sheet from different directions.

[0007] In combination with the first aspect of the present application, in an optional embodiment, the opening and closing spring sheet has a first spring sheet and a second spring sheet, one end of the first spring sheet is connected to one end of the second spring sheet, the other ends of the first spring sheet and the second spring sheet are free ends, the support member is connected to the second spring sheet, and the first spring sheet can be opened or closed relative to the support member.

[0008] 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 dowel seat.

[0009] In combination with the first aspect of the present application, in an optional embodiment, the second spring piece is provided with a first clamping piece, the support member is provided with a first clamping groove, and the first clamping piece is clamped in the first clamping groove to connect the support member to the second spring piece.

[0010] 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.

[0011] 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.

[0012] In combination with the first aspect of the present application, in an optional embodiment, the limit assembly includes a first limit member and a second limit member, one end of the first limit member and the second limit member are both connected to the first spring sheet, when the opening and closing spring sheet is closed, the other end of the first limit member is clamped on the support member, and the other end of the second limit member is used to be inserted into the pin seat.

[0013] In combination with the first aspect of the present application, in an optional implementation manner, 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; The support member is provided with a second clamping groove, and when the opening and closing spring sheet is in a closed state, the second clamping member is clamped in the second clamping groove.

[0014] In combination with the first aspect of the present application, in an optional implementation, the support member is provided with a guide groove, and during the process of the opening and closing spring sheet changing from an open state to a closed state, the second clamping member moves in the guide groove.

[0015] 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 a first snap-in through hole of the pin holder that matches the snap-in protrusion.

[0016] 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.

[0017] The separation component for surgical instruments provided in the embodiment of the present application has opening and closing spring pieces in the separation component that can clamp the anvil from both sides thereof, and utilizes 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.

[0018] 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 the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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: Figure 1 A three-dimensional schematic diagram of the overall structure of the surgical instrument provided in an embodiment of the present application; Figure 2a A schematic diagram of a separation assembly for a surgical instrument provided in an embodiment of the present application being inserted into an anvil, with the opening and closing spring piece in an open state; Figure 2b A schematic diagram of a state in which a separation assembly for a surgical instrument provided in an embodiment of the present application is assembled on an anvil; Figure 3 A schematic diagram of the three-dimensional structure of an opening and closing spring piece in a separation assembly of a surgical instrument provided in an embodiment of the present application; 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; Figure 5a A cross-sectional view of a separation assembly for a surgical instrument provided by an embodiment of the present application when in an open state; Figure 5b A cross-sectional view of a separation assembly for a surgical instrument provided by an embodiment of the present application when in a closed state; 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 when in an open state; Figure 6b A schematic diagram of a portion of the structure of an anvil in a surgical instrument provided in an embodiment of the present application; Figure 7 for Figure 6a Sectional view at AA in the middle; Figure 8A schematic diagram of the three-dimensional structure of a disassembly and assembly device for surgical instruments provided in an embodiment of the present application and equipped with an anvil; Fig. 9 A schematic diagram of the structural decomposition of a disassembly and assembly device, a separation assembly, and an anvil for a surgical instrument provided in an embodiment of the present application; Fig.10 A schematic diagram of a state in which a disassembly and assembly device for a surgical instrument provided in an embodiment of the present application assembles a separation component and an anvil; Fig.11 A schematic diagram of another state of assembling a separation component and an anvil by the disassembly and assembly device for surgical instruments provided in an embodiment of the present application; Fig.12 A schematic diagram of a state after the separation assembly and the anvil are disassembled by the disassembly and assembly device for surgical instruments provided in an embodiment of the present application; Fig.13 for Fig.11 Cross-sectional view at BB in the middle.

[0020] Reference numerals: 1. end effector; 11. jaw assembly; 111. nail magazine seat; 112. nail support seat; 1121. plug-in slot; 1122. first card-connecting through hole; 12. nail magazine assembly; 2. Separate components; 21, opening and closing spring piece; 211, first spring piece; 2111, third connection part; 2112, fourth connection part; 212, second spring piece; 2121, first connection part; 2122, second connection part; 2123, first clamping member; 2124, second clamping through hole; 21a, opening; 22, support member; 221, first clamping groove; 222, second clamping groove; 223, guide groove; 224, plug-in portion; 2241, avoidance gap; 23, limiting assembly; 231, first limiting member; 2311, second clamping member; 232, second limiting member; 2321, clamping protrusion; 3. Disassembly and assembly device; 31, base; 311, first receiving groove; 312, first through groove; 3121, first part; 3122, second part; 32, moving assembly; 321, first moving member; 322, second moving member; 3221, first guide rail groove; 33. disassembly assembly; 331. third moving member; 3311. boss; 332. elastic member; 4. Casing assembly; 5. Handle assembly. DETAILED DESCRIPTION

[0021] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show 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.

[0022] In the description of the present invention, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present invention, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation to the present invention.

[0023] In the present invention, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly include at least one of the features. In the description of the present invention, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly defined, the terms "install", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly defined, a first feature being “on”, “above”, “above”, “below”, “below”, “below” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact with each other through an intermediate medium. Moreover, a first feature being “on”, “above” or “above” a second feature 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. A first feature being “below”, “below” or “below” a second feature 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.

[0026] 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.

[0027] The stapler 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 transmission-connected to the drive assembly, and the other end is transmission-connected to the end actuator 1.

[0028] 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 seat 112 pivotally connected to the staple cartridge seat 111. The staple cartridge seat 111 is used to operably support the staple cartridge assembly 12 therein. The anvil seat 112 has a selective open position and a closed position. The anvil seat 112 cooperates with the staple cartridge seat 111 and the staple cartridge assembly 12 under the transmission action of the transmission assembly to achieve clamping or loosening of tissues.

[0029] 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.

[0030] It should be noted that the transmission assembly includes multiple transmission mechanisms, which can respectively drive the cutting knife, the nail support 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.

[0031] 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.

[0032] Related technology: During surgery, it is often necessary to peel off tissues, especially to peel off blood vessels from other tissues. Currently, the separation component 2 is detachably connected to the anvil 112 to peel off tissues using the separation component 2. However, most separation components 2 are connected to the anvil 112 by plugging. There is a gap between the separation component 2 and the anvil 112, and tissue fluid has a lubricating effect. There is a slight shaking phenomenon during the use of the separation component 2, which affects the stability of tissue peeling.

[0033] Based on this, an embodiment of the present application provides a separation component for a surgical instrument, in which the opening and closing spring pieces 21 in the separation component 2 can clamp the nail seat 112 from both sides thereof, and utilize the limiting component 23 to limit the relative position between the nail seat 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 separation component 2 has a simple structure, which can greatly reduce the manufacturing cost and further reduce the overall cost of the surgical instrument.

[0034] Specifically, Figures 2a to 4 As shown, the separation assembly 2 includes an opening and closing spring piece 21, a support member 22 and a limit 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 limit the minimum opening size of the opening and closing spring piece 21. The limit assembly 23 is connected to the opening and closing spring piece 21, and when the opening and closing spring piece 21 is in the closed state, the limit assembly 23 limits the relative position between the anvil seat 112 and the opening and closing spring piece 21 from different directions.

[0035] It can be understood that the limiting assembly 23 can limit the relative position between the opening and closing spring piece 21 and the supporting 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 between the opening and closing spring piece 21 and the supporting member 22 and the nail seat 112, and can greatly reduce the shaking of the separation assembly 2 assembled on the nail seat 112 during use.

[0036] 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.

[0037] The shape of the opening and closing spring piece 21 is similar to an eagle's beak structure, the support member 22 is connected to the second spring piece 212, and the first spring piece 211 can rotate relative to the support member 22 and the second spring piece 212, so as to realize the opening or closing of the opening and closing spring piece 21. The opening and closing spring piece 21 is made of metal and formed by a bending process, that is, the first spring piece 211 and the second spring piece 212 are integrally formed to ensure the structural strength of the connection between the first spring piece 211 and the second spring piece 212.

[0038] 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.

[0039] Figure 2a The schematic diagram shows that the separation component 2 is inserted into the dowel seat 112 and the first elastic piece 211 is in an open state relative to the support member 22 .

[0040] Figure 2b The schematic diagram shows the state where the separation component 2 is assembled on the anvil 112 , that is, the first elastic sheet 211 is in a closed state relative to the support member 22 and the second elastic sheet 212 .

[0041] Figure 5a The schematic diagram of the opening and closing elastic piece 21 in the open state is shown. The opening and closing elastic piece 21 in the embodiment of the present application in the open state means that the first elastic piece 211 is away from the support member 22.

[0042] Figure 5b A schematic diagram showing the opening and closing spring piece 21 in a closed state is shown.

[0043] 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 sheet 211, and when the opening and closing spring sheet 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 holder 112.

[0044] 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 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.

[0045] The first limit member 231 is clamped on the support member 22, and can limit the opening size of the first spring piece 211 and the second spring piece 212, so that the first spring piece 211 and the second spring piece 212 can be clamped from both sides of the anvil seat 112, which greatly increases 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, and the shaking phenomenon of the separation component 2 is greatly reduced.

[0046] 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 in different directions, thereby ensuring the firmness and stability of the connection between the opening and closing elastic piece 21 and the anvil seat 112.

[0047] Specifically, the first limiter 231 is a second clamping member 2311, one end of which is connected to the opening and closing spring sheet 21. The support member 22 is provided with 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 sheet 21 is closed.

[0048] Furthermore, the second clamping member 2311 is a metal sheet and a hook is formed at the end of the metal sheet. The hook can be clamped in the second clamping groove 222 .

[0049] In an alternative embodiment, if Figure 3 , Figure 4 , Figure 5a and Figure 6b As 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. When the opening and closing spring piece 21 is transformed from the open state to the closed state, the second clamping member 2311 moves in the guide groove 223, and the second clamping member 2311 is in a deformed state. 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 itself. Under the matching action of the second clamping member 2311 and the second clamping groove 222, the closing of the opening and closing spring piece 21 is realized, and the first spring piece 211 and the second spring piece 212 can clamp the anvil seat 112 from both sides thereof.

[0050] 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 displaced during the closing process.

[0051] In an optional embodiment, the second limiting member 232 is a snap-in protrusion 2321 connected to the side of the opening and closing spring piece 21 close to the support member 22 , and the snap-in protrusion 2321 is used to be inserted into the first snap-in through hole 1122 of the pin holder 112 .

[0052] Furthermore, a clamping protrusion 2321 is provided on one side of the first spring piece 211 close to the second spring piece 212. The number of the clamping protrusions 2321 is set according to the requirements and is not limited in the embodiment of the present application. When the first spring piece 211 is subjected to an external force and approaches the second spring piece 212, the clamping protrusion 2321 is inserted into the first clamping through hole 1122 of the anvil seat 112 and matches the clamping protrusion 2321.

[0053] 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.

[0054] 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 ​​one end of the support member 22 close to the dowel seat 112 is extended to form the inserting portion 224. The end of the dowel 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 dowel seat 112.

[0055] 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 nail 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 nail seat 112; in addition, the separation component 2 is not only inserted into the interior of the nail seat 112 but also clamped on the outer wall of the nail seat 112, thereby ensuring the connection stability between the separation component 2 and the nail seat 112.

[0056] In an optional embodiment, the plug-in portion 224 is provided with an avoidance portion opposite to the position of the clamping protrusion 2321. The avoidance portion is an avoidance through hole, and the clamping protrusion 2321 is inserted into the avoidance through hole, the first clamping through hole 1122 and the second clamping through hole 2124, so that the connection firmness between the separation component 2 and the anvil seat 112 can be improved. As a replacement, the avoidance portion is an avoidance notch 2241, and the clamping protrusion 2321 is inserted into the first clamping through hole 1122 and the second clamping through hole 2124, and abuts against the avoidance notch 2241, so that the separation component 2 can be easily disassembled.

[0057] In an alternative embodiment, if Figure 3 and Figure 5a As shown, the second elastic piece 212 has a first connection portion 2121 and a second connection portion 2122 . The first connection portion 2121 matches the support member 22 and is connected to the support member 22 , and the second connection portion 2122 is used to match the anvil seat 112 .

[0058] It can be understood that the support member 22 is connected to the first connection portion 2121 of the second elastic sheet 212, and the first connection portion 2121 is connected to the first elastic sheet 211. The second connection portion 2122 corresponds to the plug-in portion 224 and the distal end of the anvil seat 112, and is located outside the anvil seat 112.

[0059] The shape of the second connection portion 2122 matches the outer shape of the nail seat 112, so that the second connection portion 2122 can abut against the outer wall of the nail seat 112.

[0060] 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 slot 221 , and the first clamping member 2123 is clamped in the first clamping slot 221 , so that the support member 22 is connected to the second elastic piece 212 .

[0061] 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 clamping firmness and stability between the support member 22 and the second elastic piece 212 .

[0062] In an alternative embodiment, if Figure 5a As shown, the first elastic piece 211 has a third connection portion 2111 and a fourth connection portion 2112 , the third connection portion 2111 is connected to the first connection portion 2121 , and the fourth connection portion 2112 is used to match the dowel seat 112 .

[0063] 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 .

[0064] 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 the figure 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.

[0065] The third connection portion 2111 is bent relative to the fourth connection portion 2112 toward the nail magazine seat 111, and a first angle formed between the third connection portion 2111 and the fourth connection portion 2112 is an obtuse angle, which can facilitate tissue separation and further improve the smoothness and safety of the operation.

[0066] When the separation component 2 is assembled on the anvil 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 the surgical instrument on other tissues.

[0067] 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 dowel seat 112, but also ensure the assembly effect of assembling the separation component 2 on the dowel seat 112.

[0068] Specifically, Figure 8 and Fig. 9 As shown, a disassembly and assembly 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 communicating with 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, and the first moving member 321 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 a closed state, the clamping protrusion 2321 on the opening and closing spring piece 21 is inserted into the anvil seat 112.

[0069] Fig.10 2 is a schematic diagram showing the opening and closing spring 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 spring piece 21 .

[0070] Fig.11 2 is a schematic diagram showing the state of the opening and closing spring 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 spring piece 21 .

[0071] It can be understood that, when the first movable member 321 moves along the first through groove 312 under the action of external force, the first movable 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-in protrusion 2321 on the opening and closing elastic piece 21 matches the first snap-in through hole 1122 on the dowel seat 112 and the second snap-in through hole 2124 on the second elastic piece 212, thereby realizing the assembly of the separation component 2 on the dowel seat 112 using the disassembly and assembly device 3.

[0072] 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.

[0073] Specifically, the disassembly assembly 33 is movably connected to the base 31 , and the position of the disassembly assembly 33 is opposite to the first receiving groove 311 . Under the action of external force, the disassembly assembly 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 .

[0074] The above disassembly and assembly device 3 is easy to operate, and can greatly improve the assembly efficiency of the separation component 2 on the nail seat 112, as well as the disassembly efficiency of the separation component 2 from the nail seat 112, while also ensuring the assembly effect.

[0075] In an optional embodiment, the moving assembly 32 further includes a second moving member 322 , which is movably connected to the base 31 and connected to the first moving member 321 , and the second moving member 322 drives the first moving member 321 to move synchronously.

[0076] The second moving member 322 is connected to the top of the base 31 for the convenience of the operator. The second moving member 322 drives the first moving member 321 to move synchronously, which can not only improve the convenience of operation but also save time and effort for the operator.

[0077] The second moving member 322 is a sliding block mounted on the base 31 , and an anti-slip pattern is provided on the upper surface of the sliding block to further improve the operation efficiency.

[0078] 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. 1 ; the second direction, i.e. Figure 8 The z-axis direction in the coordinate system shown in FIG; the axial direction of the first moving member 321, that is, Figure 8 The y-axis direction in the coordinate system shown in .

[0079] It can be understood that the first movable 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 movable member 321 matches the size of the first guide groove 3221 , so the first movable member 321 cannot move along the first direction in the first guide groove 3221 .

[0080] In an optional embodiment, the first through groove 312 has a first portion 3121 and a second portion 3122 . Before the separation assembly 2 is assembled on the dowel seat 112 , the first moving member 321 is placed in the first portion 3121 , and the second portion 3122 corresponds to the first accommodating groove 311 .

[0081] When the separation component 2 needs to be assembled on the nail seat 112, the first movable 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 movable member 322, and can act on the first elastic sheet 211, so that the first elastic sheet 211 is inserted into the nail seat 112, and the first limiting member 231 is clamped in the first clamping groove 221.

[0082] In an alternative embodiment, if Fig. 9 , Fig.12 and Fig.13 As shown, the disassembly assembly 33 includes a third moving member 331, which is accommodated in a second accommodating groove (not shown in the figure) provided in the base 31 and can move in the second accommodating groove. When it is necessary to detach the separation assembly 2 from the anvil seat 112, the third moving member 331 is used to act on the separation assembly 2 and detach the separation assembly 2 from the anvil seat 112.

[0083] 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.

[0084] It should be noted that when the engaging protrusion 2321 of the first spring sheet 211 is disengaged from the anvil seat 112, the fourth connection portion 2112 of the first spring sheet 211 is bent and deformed relative to the third connection portion 2111. When the engaging protrusion 2321 of the first spring sheet 211 is disengaged from the anvil seat 112, the second engaging member 2311 of the first position-limiting member 231 is always engaged with the second engaging groove 222 of the supporting member 22. Since the surgical instrument is a disposable device, it is not necessary to disengage the second engaging member 2311 from the second engaging groove 222, which can reduce the complexity of the operation of the surgical instrument.

[0085] Fig.12, a schematic diagram showing a state in which the engaging protrusion 2321 of the first elastic sheet 211 is disengaged from the anvil 112 under the action of the boss 3311 , and the fourth connecting portion 2112 of the first elastic sheet 211 is bent and deformed relative to the third connecting portion 2111 .

[0086] In an optional embodiment, the disassembly assembly 33 further includes an elastic member 332, one end of the elastic member 332 is connected to the base 31, and the other end is connected to the third moving member 331. When the separation assembly 2 is disengaged from the anvil seat 112 under the action of the third moving member 331, the third moving 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 certainly not limited thereto.

[0087] The separation assembly 2 is assembled on the anvil 112 using the disassembly and assembly device 3, including the following steps: The separation component 2 is placed in the first receiving groove 311 of the base 31 , and the insertion portion 224 of the separation component 2 is inserted into the anvil seat 112 .

[0088] Push the second moving member 322 along Fig.10 The second moving member 322 moves the first moving member 321 in the direction of the arrow s1 shown in FIG. 3 . Under the action of the first moving member 321 , the separation assembly 2 is assembled on the anvil seat 112 .

[0089] The disassembly device 3 is used to disassemble the separation assembly 2 from the anvil seat 112, including the following steps: The separation assembly 2 is placed in the first receiving groove 311 of the base 31 .

[0090] The external force acts on the third moving member 331 and causes the third moving member 331 to move along Fig.12 The third moving member 331 moves in the direction of the arrow s2 shown in the figure, and the boss 3311 of the third moving member 331 acts on the clamping protrusion 2321 of the first elastic sheet 211, and can make the clamping protrusion 2321 disengage from the anvil seat 112. In this state, the anvil seat 112 can be taken out from the separation assembly 2.

[0091] The embodiment of the present application also provides a surgical instrument, including a disassembly and assembly device for surgical instruments provided by any of the above embodiments and a separation assembly for surgical instruments provided by any of the above embodiments. The separation assembly 2 has a simple structure, which can reduce the manufacturing 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 seat 112 from both sides thereof, and the limiting assembly 23 can limit the relative position of the anvil seat 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 seat 112, but also ensure the assembly effect of assembling the separation assembly 2 on the anvil seat 112, further improving the smoothness of the use of the surgical instrument in surgery.

[0092] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of 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 other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. A separation assembly for a surgical instrument, characterized in that: The surgical instrument comprises an anvil seat (112), the separation assembly (2) being detachably connected to the distal end of the anvil seat (112), the separation assembly (2) comprising: An opening and closing spring sheet (21) having an opening, capable of opening or closing, and capable of clamping the anvil seat (112) from both sides thereof; A support member (22) connected to the opening of the opening and closing spring sheet (21); A limiting assembly (23) is connected to the opening and closing spring sheet (21); when the opening and closing spring sheet (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 sheet (21) from different directions.

2. The separation assembly for surgical instruments according to claim 1, characterized in that: The opening and closing spring sheet (21) comprises a first spring sheet (211) and a second spring sheet (212); one end of the first spring sheet (211) is connected to one end of the second spring sheet (212); the other ends of the first spring sheet (211) and the second spring sheet (212) are free ends; the support member (22) is connected to the second spring sheet (212); and the first spring sheet (211) can be opened or closed relative to the support member (22).

3. The separation assembly for surgical instruments according to claim 2, characterized in that: 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).

4. The separation assembly for surgical instruments according to claim 3, characterized in that: 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).

5. The separation assembly for surgical instruments according to claim 3, characterized in that: 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 seat (112).

6. The separation assembly for surgical instruments according to claim 5, 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.

7. The separation assembly for surgical instruments according to claim 2, characterized in that: The limiting assembly (23) comprises 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) being connected to the first spring sheet (211); when the opening and closing spring sheet (21) is closed, the other end of the first limiting member (231) is clamped on the supporting member (22), and the other end of the second limiting member (232) is used for being inserted into the anvil seat (112).

8. The separation assembly for surgical instruments according to claim 7, 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 sheet (21); The support member (22) is provided with a second clamping groove (222), and when the opening and closing spring sheet (21) is in a closed state, the second clamping member (2311) is clamped in the second clamping groove (222).

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

10. The separation assembly for surgical instruments according to claim 7, characterized in that: The second limiting member (232) is a clamping protrusion (2321) connected to the side of the opening and closing spring piece (21) close to the supporting member (22), and the clamping protrusion (2321) is used to be inserted into a first clamping through hole (1122) of the anvil seat (112) that matches the clamping protrusion (2321).

11. A surgical instrument, characterized in that: Comprising a separation assembly for a surgical instrument as described in any one of claims 1 to 10.

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