End effector of anastomat and anastomat

Abstract

The invention relates to the technical field of medical instruments, and discloses an end effector of an anastomat and the anastomat, the end effector of the anastomat comprises a nail anvil, a nail bin seat and a cutting knife, the nail bin seat can rotate around a shaft relative to the nail anvil, the near end of the nail anvil or the cutting knife comprises a protruding part, the nail bin seat is provided with a limiting part, and the limiting part is arranged on the nail bin seat. The limiting part is used for being matched with the protruding part when the nail bin base is in the open state so that the nail bin base can be locked in the open state. The projection of the limiting part in the length direction of the nail anvil is limiting projection, the projection of the shaft in the length direction of the nail anvil is shaft projection, the limiting projection and the shaft projection are arranged at intervals, and the limiting projection is located on the side, close to the far end of the nail anvil, of the shaft projection. According to the end effector of the anastomat and the anastomat, the problems that in the prior art, the nail bin in the anastomat is difficult and inconvenient to disassemble and assemble, and the efficiency is not high can be solved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an end effector of a stapler and a stapler. Background Technology

[0002] As a novel medical device, the stapler is widely used for tissue suturing and cutting in surgical procedures. The end effector of a stapler typically includes a cutting blade movable between the proximal and distal ends, and a staple cartridge unit and an anvil connected by a pivot to open and close relative to each other. The staple cartridge unit generally includes a staple cartridge seat and a staple cartridge mounted to the staple cartridge seat.

[0003] The staple cartridge unit is rotatable relative to the anvil, meaning the staple cartridge seat and the anvil are rotatably connected. The movement of the staple cartridge seat enables opening and closing. In a single surgery, multiple staple cartridges often need to be replaced and multiple suturing operations need to be performed. Therefore, each time a staple cartridge is used, it needs to be removed from the staple cartridge seat to replace it with a new one. However, when the staple cartridge seat can be opened and closed, it is necessary to remove the staple cartridge when the staple cartridge seat is in the open state. This requires keeping the staple cartridge seat locked in the open state to facilitate the removal of the staple cartridge. The current staple cartridge removal and installation process is relatively difficult, inconvenient, and inefficient. Summary of the Invention

[0004] This application provides an end effector and a stapler for a stapler, which can improve the problems of difficult and inconvenient disassembly and installation of the staple cartridge in the stapler in the related art, and low efficiency.

[0005] In a first aspect, embodiments of this application provide an end effector for a stapler, including an anvil, a staple cartridge seat, and a cutting blade. The staple cartridge seat is rotatable about an axis relative to the anvil. The proximal end of the anvil or the cutting blade includes a protrusion. The proximal end of the staple cartridge seat is provided with a limiting portion. The limiting portion is used to cooperate with the protrusion when the staple cartridge seat is in an open state, so as to lock the staple cartridge seat in the open state.

[0006] Wherein, the projection of the limiting part on the length direction of the anvil is the limiting projection, the projection of the shaft on the length direction of the anvil is the shaft projection, the limiting projection and the shaft projection are spaced apart, and the limiting projection is located on the side of the shaft projection closer to the far end of the anvil.

[0007] In some embodiments, the cutting blade includes a connected blade head and a blade shank. The blade head is I-shaped and includes a main body and lugs connected to both ends of the main body. The lugs are located near one end of the staple cartridge.

[0008] In some embodiments, the cutting blade includes a connected blade head and a blade shank. The blade head is I-shaped and includes a main body and lugs connected to both ends of the main body. The lugs are connected to the side of the main body near the proximal end of the staple cartridge.

[0009] In some embodiments, the staple cartridge holder includes a sliding groove, and the limiting part is a stop plate disposed on the staple cartridge holder and located near the sliding groove. The retraction of the cutting blade allows the protrusion to be inserted between the sliding groove and the stop plate, so that the protrusion abuts against the stop plate, thereby restricting the closing movement of the staple cartridge holder and locking the staple cartridge holder in the open state.

[0010] In some embodiments, the sliding groove has a recessed portion at its proximal end, and a stop plate is disposed at the proximal end of the recessed portion such that the opening of the recessed portion has a blocked portion and an open portion, wherein the open portion allows the protrusion to enter the recessed portion.

[0011] In some embodiments, the proximal end of the anvil includes two opposing elastic arms, the proximal end of the staple cartridge seat is at least partially located between the two elastic arms, the elastic arms include the protrusion, and the proximal end of the staple cartridge seat is provided with a limiting portion on the sidewall corresponding to the elastic arm. When the staple cartridge seat is in the open state, the protrusion abuts against the limiting portion to lock the staple cartridge seat in the open state.

[0012] In some embodiments, the cutting blade has an initial position and a free position; when the cutting blade is in the initial position, the limiting portion cooperates with the protrusion to lock the staple cartridge seat in the open state, and the cutting blade is in the free position.

[0013] When in the free position, the limiting part disengages from the protrusion, allowing the staple cartridge seat to open and close freely; wherein, the free position is located at a predetermined distance from the initial position, near the far end of the staple cartridge seat.

[0014] In some embodiments, the end effector includes an elastic element disposed on the anvil or near the end of the staple cartridge, which allows the cutting blade to accumulate elastic potential energy when it retracts to the initial position. This elastic potential energy is used to drive the cutting blade forward to the free position.

[0015] In some embodiments, multiple elastic elements are provided, and the multiple elastic elements are arranged in parallel and spaced apart.

[0016] Secondly, embodiments of this application provide a stapler, the stapler including a control handle, a linkage assembly and an end effector as described in the first aspect.

[0017] The end effector provided in this application has the following advantages: Since the end effector includes an anvil, a staple cartridge holder, and a cutting blade, the anvil can rotate about an axis relative to the staple cartridge holder, and the proximal end of the anvil or the cutting blade includes a protrusion, and the proximal end of the staple cartridge holder is provided with a limiting part, the limiting part can cooperate with the protrusion when the staple cartridge holder is in the open state to lock the staple cartridge holder in the open state, facilitating the installation of the staple cartridge onto the staple cartridge holder and the removal of the staple cartridge from the staple cartridge holder. The end effector provided in this application can improve the problems of difficult and inconvenient staple cartridge removal and installation processes and low efficiency in related technologies.

[0018] The advantages of the anastomosis device provided in this application compared to the prior art can be seen in the description of the advantages of the end effector provided in this application compared to the prior art, which will not be repeated here. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial structural diagram of the anvil rotating about an axis to a closed state relative to the staple cartridge seat in the end effector of the stapler in the first embodiment of this application;

[0021] Figure 2 yes Figure 1 The diagram shows a partial structural schematic of the anvil rotating about an axis relative to the staple cartridge seat to the open state;

[0022] Figure 3 yes Figure 1 A partial structural diagram of the cutting blade in the end effector is shown;

[0023] Figure 4 This is a partial structural diagram of the anvil rotating about an axis to the open state relative to the staple cartridge seat in the end effector in the second embodiment of this application;

[0024] Figure 5 yes Figure 4 A partial structural diagram of the cutting blade in the end effector is shown;

[0025] Figure 6 This is a partial structural diagram of the end effector in the third embodiment of this application;

[0026] Figure 7 yes Figure 6The top view of the end effector shown;

[0027] Figure 8 yes Figure 6 A partial structural diagram of the cutting blade in the end effector is shown;

[0028] Figure 9 yes Figure 6 A schematic diagram showing the retraction of the cutting blade of the end effector;

[0029] Figure 10 yes Figure 9 The top view of the end effector shown;

[0030] Figure 11 yes Figure 6 The diagram shows a partial structural schematic of the end effector in which the anvil rotates about an axis relative to the staple cartridge seat to the open state;

[0031] Figure 12 yes Figure 6 The diagram shows a partial structural schematic of the end effector in which the anvil rotates about an axis relative to the staple cartridge seat to a closed state;

[0032] Figure 13 This is a partial structural diagram of the end effector in the fourth embodiment of this application;

[0033] Figure 14 yes Figure 13 The front view of the end effector shown;

[0034] Figure 15 yes Figure 13 The diagram shows the structure of the anvil in the end effector.

[0035] Figure 16 yes Figure 15 A schematic diagram of a partial structure of the anvil shown;

[0036] Figure 17 yes Figure 15 A partial structural diagram of the anvil from another perspective;

[0037] Figure 18 yes Figure 13 The diagram shows the engagement of the anvil and the staple cartridge in the end effector.

[0038] Figure 19 yes Figure 18 A magnified view of a section at point A in the middle;

[0039] Figure 20 This is a partial structural diagram of the end effector in the fifth embodiment of this application;

[0040] Figure 21 yes Figure 20The diagram shows a partial structural schematic of the end effector in which the anvil rotates about an axis relative to the staple cartridge seat to the open state;

[0041] Figure 22 yes Figure 20 The diagram shows another partial structural schematic of the end effector in which the anvil rotates about an axis relative to the staple cartridge seat to the open state.

[0042] The markings in the diagram mean:

[0043] 10. Anvil; 11. Rigid part; 12. Elastic arm; 20. Pin cartridge seat; 21. Sliding groove; 211. Recess; 22. Guide surface; 30. Cutting blade; 301. Protrusion; 31. Blade head; 311. Main body; 312. Lug; 32. Blade shank; 40. Limiting part; 50. Shaft; 60. Opening and closing spring; 70. Stop part; 80. Elastic element; 90. Pin cartridge. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0048] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0049] Anastomosing devices, as a novel type of medical device, are widely used in surgical procedures for tissue suturing and cutting. The end effector of an anastomosis device typically includes a cutting blade movable between proximal and distal ends, and a staple cartridge unit and an anvil connected by a pivot to open and close relative to each other. The proximal end of the end effector is the end closer to the operator, and the distal end is the end further away from the operator. The staple cartridge unit generally includes a staple cartridge seat and a staple cartridge mounted to the seat.

[0050] The staple cartridge unit is rotatable relative to the anvil, meaning the staple cartridge seat and the anvil are rotatably connected. The movement of the staple cartridge seat enables opening and closing. In a single surgery, multiple staple cartridges often need to be replaced and multiple suturing operations need to be performed. Therefore, each time a staple cartridge is used, it needs to be removed from the staple cartridge seat to replace it with a new one. However, when the staple cartridge seat can be opened and closed, it is necessary to remove the staple cartridge when the staple cartridge seat is in the open state. This requires keeping the staple cartridge seat locked in the open state to facilitate the removal of the staple cartridge. The current staple cartridge removal and installation process is relatively difficult, inconvenient, and inefficient.

[0051] In view of this, this application provides an end effector for a stapler and a stapler. Since the end effector includes an anvil, a staple cartridge holder, and a cutting blade, the anvil can rotate about an axis relative to the staple cartridge holder, and the proximal end of the anvil or the cutting blade includes a protrusion, and the proximal end of the staple cartridge holder is provided with a limiting part, the limiting part can cooperate with the protrusion when the staple cartridge holder is in the open state to lock the staple cartridge holder in the open state, facilitating the installation of the staple cartridge onto the staple cartridge holder and the removal of the staple cartridge from the staple cartridge holder. The end effector provided in this application can improve the problems of difficult and inconvenient staple cartridge removal and installation processes and low efficiency in related technologies.

[0052] Please refer to Figures 1 to 3 The first embodiment of this application provides an end effector for a stapler. The stapler includes a control handle, a linkage assembly, and an end effector. The end effector includes an anvil 10, a staple cartridge seat 20, and a cutting blade 30. The staple cartridge seat 20 is rotatable about an axis 50 relative to the anvil 10. The proximal end of the anvil 10 or the cutting blade 30 includes a protrusion 301. The proximal end of the staple cartridge seat 20 is provided with a limiting part 40. The limiting part 40 is used to cooperate with the protrusion 301 when the staple cartridge seat 20 is in the open state, so that the staple cartridge seat 20 is locked in the open state.

[0053] The proximal end of the anvil 10 is the end of the anvil 10 closest to the operator, and the distal end of the anvil 10 is the end of the anvil 10 furthest from the operator. The proximal end of the staple cartridge seat 20 is the end of the staple cartridge seat 20 closest to the operator, and the distal end of the staple cartridge seat 20 is the end of the staple cartridge seat 20 furthest from the operator.

[0054] The projection of the limiting part 40 on the length direction of the anvil 10 is the limiting projection, and the projection of the shaft 50 on the length direction of the anvil 10 is the shaft projection. The limiting projection and the shaft projection are spaced apart, and the limiting projection is located on the side of the shaft projection closer to the far end of the anvil 10.

[0055] The limiting part 40 can be configured as a limiting groove or a limiting protrusion, etc. The staple cartridge seat 20 is used to connect with the staple cartridge 90. The length direction of the staple anvil 10 can be parallel to the direction indicated by arrow N and arrow M in the figure.

[0056] When it is necessary to install the staple cartridge 90 onto the staple cartridge holder 20 or to remove the staple cartridge 90 from the staple cartridge holder 20, simply retract the cutting blade 30 (it can be retracted to the zero position), so that the staple cartridge holder 20 is in the open state, and the protrusion 301 engages with the limiting part 40 to lock the staple cartridge holder 20 in the open state, so that the jaws of the end effector are in the open state and remain open. At this time, the zero position of the drive motor can self-lock, so that the cutting blade 30 is in a state where it cannot move (it can also be applied to manual staplers), which makes it easy to install the staple cartridge 90 onto the staple cartridge holder 20 and easy to remove the staple cartridge 90 from the staple cartridge holder 20.

[0057] As can be seen from the above, when the staple cartridge 20 can rotate, the anvil 10 is fixed, while the cutting blade 30 can only move in a straight line. Therefore, it is necessary to restrict the rotation of the staple cartridge 20, which can obviously be achieved by the anvil 10 and the cutting blade 30. Therefore, the protrusion 301 can be designed to be located on the anvil 10 or the cutting blade 30.

[0058] The end effector provided in this application includes an anvil 10, a staple cartridge seat 20, and a cutting blade 30. The anvil 10 can rotate about an axis relative to the staple cartridge seat 20, and the proximal end of the anvil 10 or the cutting blade 30 includes a protrusion 301. The proximal end of the staple cartridge seat 20 is provided with a limiting part 40. Therefore, the limiting part 40 can cooperate with the protrusion 301 when the staple cartridge seat 20 is in the open state, so that the staple cartridge seat 20 is locked in the open state, which facilitates the installation of the staple cartridge 90 onto the staple cartridge seat 20 and the removal of the staple cartridge 90 from the staple cartridge seat 20. The end effector provided in this application can improve the problem that the removal and installation process of the staple cartridge 90 in the stapler in the related art is difficult, inconvenient, and inefficient.

[0059] Optionally, the end effector includes an opening / closing spring 60, which assists the jaws of the end effector in being in an open state.

[0060] Please continue to refer to this. Figures 1 to 3 In the first embodiment, the cutting blade 30 includes a blade head 31 and a blade shank 32 connected to each other. The blade head 31 is I-shaped and includes a main body 311 and lugs 312 connected to both ends of the main body 311. The protrusion 301 is the lug 312 near the end of the staple cartridge seat 20.

[0061] By adopting the above solution, the lug 312 of the cutting head 31 of the cutting blade 30 itself can be used as the protrusion 301, eliminating the need to set an additional protrusion 301 on the cutting blade 30. This makes the processing simpler, more economical, and easier to manufacture the cutting blade 30.

[0062] In the first embodiment, the staple cartridge seat 20 includes a sliding groove 21, and the limiting part 40 is a stop plate disposed on the staple cartridge seat 20 and located near the end of the sliding groove 21. When the cutting blade 30 retracts, the protrusion 301 can be inserted between the sliding groove 21 and the stop plate, so that the protrusion 301 abuts against the stop plate, thereby restricting the closing movement of the staple cartridge seat 20 and locking the staple cartridge seat 20 in the open state.

[0063] By adopting the above scheme, when the cutting blade 30 is retracted, the protrusion 301 can be inserted between the sliding groove 21 and the stop plate, so that the protrusion 301 abuts against the stop plate, thereby restricting the closing movement of the staple cartridge seat 20 and locking the staple cartridge seat 20 in the open state, ensuring that the jaws of the end effector are in the open state and are stably maintained, so as to facilitate the installation of the staple cartridge 90 onto the staple cartridge seat 20 or to facilitate the removal of the staple cartridge 90 from the staple cartridge seat 20.

[0064] The sliding groove 21 has a recess 211 at its proximal end, and a stop plate is provided at the proximal end of the recess 211, such that the opening of the recess 211 has a blocked portion and an open portion, wherein the open portion allows the protrusion 301 to enter the recess 211.

[0065] This design allows the protrusion 301 to easily enter the recess 211, so that the protrusion 301 abuts against the stop plate.

[0066] The proximal end of the sliding groove 21 is the end of the sliding groove 21 closer to the operator, and the distal end of the sliding groove 21 is the end of the sliding groove 21 farther from the operator. The proximal end of the recess 211 is the end of the recess 211 closer to the operator, and the distal end of the recess 211 is the end of the recess 211 farther from the operator.

[0067] Please refer to Figure 4 and Figure 5 Unlike the first embodiment, in the second embodiment, the blade 31 includes a main body 311 and lugs 312 connected to both ends of the main body 311. The blade 31 is I-shaped, and the protrusion 301 is connected to the side of the main body 311 near the proximal end of the staple cartridge 20.

[0068] By adopting the above scheme, it is easy to flexibly set the position of the protrusion 301 so as to cooperate with the limiting part 40.

[0069] Please refer to Figures 6 to 12 In the third embodiment, the cutting blade 30 has an initial position and a free position. When the cutting blade 30 is in the initial position, the limiting part 40 cooperates with the protrusion 301 to lock the staple cartridge seat 20 in the open state. When the cutting blade 30 is in the free position, the limiting part 40 disengages from the protrusion 301, allowing the staple cartridge seat 20 to open and close freely. The free position is located at a predetermined distance from the initial position, close to the far end of the staple cartridge seat 20.

[0070] By adopting the above solution, the limiting part 40 and the protrusion 301 can cooperate to lock the staple cartridge seat 20 in the open state, so as to facilitate the installation of the staple cartridge 90 onto the staple cartridge seat 20 and the removal of the staple cartridge 90 from the staple cartridge seat 20. Furthermore, the limiting part 40 and the protrusion 301 can be disengaged, and the anvil 10 can rotate relative to the staple cartridge seat 20 around the axis 50 to the closed state, so as to close the jaws of the end effector, thereby facilitating its removal from the patient's body.

[0071] The limiting part 40 may include a limiting surface, and the limiting part 40 cooperates with the protrusion 301, that is, the protrusion 301 abuts against the limiting surface.

[0072] It should be noted that the initial position is the zero position where the cutting blade 30 retracts to its proximal end, and the free position is the position of the cutting blade 30 when the limiting part 40 disengages from the protrusion 301. Therefore, any position of the cutting blade 30 at a preset distance from the initial position near the far end of the staple cartridge 20 when the limiting part 40 disengages from the protrusion 301 can be considered the free position (e.g., the free position is...). Figure 16 (The position of the middle cutting blade 30).

[0073] The end effector includes an elastic element 80 located on the anvil 10 or near the end of the nail magazine 90. When the cutting blade 30 retracts to the initial position, the elastic element 80 can accumulate elastic potential energy, which is used to drive the cutting blade 30 forward to the free position.

[0074] With this configuration, the elastic potential energy stored in the elastic element 80 can automatically drive the cutting blade 30 forward to the free position.

[0075] It should be noted that the retraction of the cutter 30 refers to the movement of the cutter 30 from the distal end of the end effector to the proximal end of the stapler, as indicated by arrow N in the figure. The forward movement of the cutter 30 refers to the movement of the cutter 30 from the proximal end of the end effector to the distal end of the stapler, as indicated by arrow M in the figure.

[0076] The proximal end of the stapled cartridge 90 is the end of the stapled cartridge 90 that is closer to the operator, and the distal end of the stapled cartridge 90 is the end of the stapled cartridge 90 that is farther away from the operator.

[0077] For example, the elastic element 80 may be a spring, elastic rubber, or elastic metal, etc.

[0078] In the third embodiment, when the cutting blade 30 retracts to the zero position (i.e., the initial position) at the tail of the staple cartridge seat 20, the zero-position self-locking of the drive motor compresses the elastic element 80 on the anvil 10, accumulating elastic potential energy, thereby preventing the cutting blade 30 from moving. The protrusion 301 of the cutting blade 30 at the jaws abuts against the limiting surface of the staple cartridge seat 20, allowing for easy disassembly or assembly of the staple cartridge 90. If a drive motor malfunctions at this zero position, a forced retraction mechanism can be used to cut off the transmission between the drive motor and the rack. The cutting blade 30 is then propelled to the free position by the elastic force of the elastic element 80, disengaging the protrusion 301 from the limiting surface. The jaws automatically close under external force when the tamper is pulled out, facilitating user operation and effectively avoiding the safety risk of the jaws getting stuck and unable to be pulled out.

[0079] Optionally, multiple elastic elements 80 can be provided, with the multiple elastic elements 80 spaced apart. This arrangement allows the elastic force exerted on the cutting blade 30 by the elastic elements 80 to be more uniform.

[0080] Please refer to Figures 13 to 19 The fourth embodiment of this application provides an end effector for a stapler, which includes an anvil 10, a staple cartridge seat 20 and a cutting blade 30. The staple cartridge seat 20 is used to install a staple cartridge 90 and can rotate about an axis 50 relative to the anvil 10.

[0081] The proximal end of the anvil 10 includes two elastic arms 12 disposed opposite to each other. The proximal end of the staple cartridge seat 20 is at least partially located between the two elastic arms 12. Each elastic arm 12 includes a protrusion 301. A limiting portion 40 is provided on the side wall corresponding to the elastic arm 12 at the proximal end of the staple cartridge seat 20. When the staple cartridge seat 20 is in the open state, the protrusion 301 abuts against the limiting portion 40.

[0082] By adopting the above solution, when it is necessary to install the staple cartridge 90 onto the staple cartridge seat 20 or to remove the staple cartridge 90 from the staple cartridge seat 20, the two elastic arms 12 need to be pressed in the direction that brings them closer together, so that the two elastic arms 12 respectively abut against the limiting portions 40 of the two opposite side walls of the staple cartridge seat 20, maintaining contact and generating sufficient locking force to fix the position of the staple cartridge seat 20, thereby restricting the staple cartridge seat 20 from rotating about the axis 50 relative to the anvil 10, making it easier to remove the staple cartridge 90 from the staple cartridge seat 20.

[0083] It should be noted that during the retraction of the cutting blade 30, the opening and closing spring 60 contacts the staple cartridge 90, pushing open the staple cartridge seat 20 and causing the staple cartridge seat 20 to rotate relative to the anvil 10 around the axis 50, thereby opening the jaws. When removing the staple cartridge 90, the two elastic arms 12 can be pressed in the direction that brings them closer together. The two elastic arms 12 respectively abut against the limiting parts 40 on the two opposite side walls of the staple cartridge seat 20. The large friction between the limiting parts 40 on the side walls of the staple cartridge seat 20 and the elastic arms 12 restricts the rotation of the anvil 10 relative to the staple cartridge seat 20 around the axis, keeping the anvil 10 in an open state relative to the staple cartridge seat 20, thus completing the removal of the staple cartridge 90. If it is necessary to rotate the anvil 10 relative to the staple cartridge seat 20 around the axis 50 to a closed state, and to remove the squeezing force that brings the two elastic arms 12 closer together, then it is only necessary to overcome the small frictional force between the limiting part 40 of the side wall of the staple cartridge seat 20 and the elastic arms 12. The two elastic arms 12 can be deformed and stretched outward under the lateral force, so that the staple cartridge seat 20 can be moved out between the two elastic arms 12, thereby achieving jaw closure and firing.

[0084] The anvil 10 may include a rigid part 11, and both elastic arms 12 are connected to the rigid part 11.

[0085] The anvil 10 can be a thin sheet metal part, and the protrusion 301 is made by stamping.

[0086] Optionally, the limiting part 40 is configured as a card slot, and the protrusion 301 is located inside the card slot.

[0087] This configuration allows the elastic arms 12 to be pressed together in a direction that brings them closer together, making the limiting portion 40 of the side wall of the staple cartridge 20 more stable, thus limiting the rotation of the staple cartridge 20 relative to the anvil 10 about the axis 50.

[0088] Optionally, the protrusion 301 abuts against the top of the side wall of the staple cartridge holder 20. This arrangement allows the two elastic arms 12 to deform and expand outward under lateral force when no external force is applied, moving the staple cartridge holder 20 out between the two elastic arms 12, thereby achieving jaw closure and firing.

[0089] Optionally, to facilitate the movement of the staple cartridge 20 between the two elastic arms 12, a guide surface 22 is provided on the top of the side wall of the staple cartridge 20.

[0090] Please refer to Figure 20 , Figure 21 and Figure 22The fifth embodiment of this application provides an end effector for a stapler. The stapler includes a control handle, a linkage assembly, and an end effector. The end effector includes an anvil 10, a staple cartridge seat 20, and a cutting blade 30. The anvil 10 is rotatable about an axis 50 relative to the staple cartridge seat 20. The cutting blade 30 includes a protrusion 301. A limiting part 40 is provided at the proximal end of the staple cartridge seat 20. The limiting part 40 is used to cooperate with the protrusion 301 when the anvil 10 is in the open state, so that the anvil 10 is locked in the open state.

[0091] The projection of the limiting part 40 on the length direction of the anvil 10 is the limiting projection, and the projection of the axis on the length direction of the anvil 10 is the axis projection. The limiting projection and the axis projection are spaced apart, and the limiting projection is located on the side of the axis projection closer to the far end of the anvil 10.

[0092] By adopting the above scheme, during the operation of the end effector in the patient's abdominal cavity, the anvil 10 can be locked in the open state when using the anvil 10 to dissect tissue, preventing it from rotating.

[0093] The protrusion 301 abuts against the limiting part 40 to achieve the cooperation between the protrusion 301 and the limiting part 40; the cutting blade 30 has an initial position and a free position; when the cutting blade 30 is in the initial position, the limiting part 40 cooperates with the protrusion 301 to lock the anvil 10 in the open state; when the cutting blade 30 is in the free position, the limiting part 40 disengages from the protrusion 301, allowing the anvil 10 to open and close freely; the free position is located at a predetermined distance from the initial position, near the distal end of the staple cartridge seat 20 or near the proximal end of the staple cartridge seat 20.

[0094] By adopting the above solution, the protrusion 301 can cooperate with the limiting part 40 to lock the anvil 10 in the open state, and the limiting part 40 can disengage from the protrusion 301. The anvil 10 can rotate around the axis 50 relative to the staple cartridge seat 20 to the closed state, so that the jaws of the end effector are in the closed state, which facilitates removal from the patient's body. Moreover, it has fewer parts, a simpler structure, lower instrument cost, and can reduce patient expenses.

[0095] It should be noted that, in the fifth embodiment, the initial position refers to the position of the cutting blade 30 when the protrusion 301 abuts against the limiting part 40. Considering that the limiting part 40 has a certain length in the moving direction of the cutting blade 30, any position of the cutting blade 30 when the protrusion 301 abuts against the limiting part 40 can be the initial position. The free position refers to the position of the cutting blade 30 when the protrusion 301 disengages from the limiting part 40. Therefore, any position of the cutting blade 30 located at a preset distance from the initial position, near the distal end of the staple cartridge 20 or near the proximal end of the staple cartridge 20, can be the free position.

[0096] In the fifth embodiment, the free position is located at a predetermined distance from the proximal end of the staple cartridge 20 near the initial position.

[0097] Understandably, when the cutting blade 30 retracts to its initial position, causing the protrusion 301 to abut against the limiting part 40, the drive motor's zero-position self-locking prevents the cutting blade 30 from moving. At this time, the anvil 10 is locked in the open state, and the jaws are fully open. If the cutting blade 30 malfunctions in the initial position, a forced retraction mechanism can be used to cut off the transmission between the drive motor and the rack, allowing the cutting blade 30 to continue retracting to its free position. The jaws automatically close under external force when the tamper is pulled out, effectively avoiding the safety risk of the jaws getting stuck and unable to be pulled out.

[0098] To make it easier to confirm when the cutting blade 30 retracts to the free position, one of the anvil 10 and the nail cartridge seat 20 is provided with a stop part 70, which can resist the cutting blade 30 when it retracts to the free position.

[0099] With this configuration, by simply retracting the cutting blade 30 to abut against the stop portion 70, it can be known that the cutting blade 30 is in a free position, thereby allowing the anvil 10 to open and close freely, and enabling the anvil 10 to rotate relative to the nail cartridge seat 20 around the axis 50 to a closed state.

[0100] The proximal end and distal end of the protrusion 301 have dimensions of 2.3mm-2.7mm along the moving direction of the cutting blade 30.

[0101] This configuration can cover the control precision of the transmission dimension chain of the anastomosis device control handle, ensuring that the protrusion 301 can abut against the limiting part 40 when the cutting blade 30 retracts to the initial position, and ensuring that the protrusion 301 can disengage from the limiting part 40 when the cutting blade 30 retracts to the free position.

[0102] The proximal end of the protrusion 301 is the end of the protrusion 301 that is closer to the operator, and the distal end of the protrusion 301 is the end of the protrusion 301 that is farther away from the operator.

[0103] For example, please refer to Figure 20 , Figure 21 and Figure 22 Assuming the distance between the cutting head 31 of the cutting blade 30 and the stop portion 70 along the moving direction of the cutting blade 30 is L, when the distal end of the protrusion 301 abuts against the limiting portion 40, the distance between the cutting head 31 of the cutting blade 30 and the stop portion 70 along the moving direction of the cutting blade 30 is L1, and when the limiting portion 40 at the proximal end of the protrusion 301 abuts against it, the distance between the cutting head 31 of the cutting blade 30 and the stop portion 70 along the moving direction of the cutting blade 30 is L2. The difference between L2 and L1 can be 2.5mm.

[0104] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An end effector for a stapler, characterized in that, The device includes an anvil (10), a staple cartridge seat (20), and a cutting blade (30). The staple cartridge seat (20) is rotatable about an axis (50) relative to the anvil (10). The proximal end of the anvil (10) or the cutting blade (30) includes a protrusion (301). The proximal end of the staple cartridge seat (20) is provided with a limiting part (40). The limiting part (40) is used to cooperate with the protrusion (301) when the staple cartridge seat (20) is in the open state, so that the staple cartridge seat (20) is locked in the open state. Wherein, the projection of the limiting part (40) on the length direction of the anvil (10) is the limiting projection, and the projection of the shaft (50) on the length direction of the anvil (10) is the shaft projection. The limiting projection and the shaft projection are spaced apart, and the limiting projection is located on the side of the shaft projection closer to the far end of the anvil (10).

2. The end effector according to claim 1, characterized in that, The cutting blade (30) includes a blade head (31) and a blade shank (32) connected together. The blade head (31) is I-shaped and includes a main body (311) and lugs (312) connected to both ends of the main body (311). The protrusion (301) is the lug (312) near the end of the staple cartridge seat (20).

3. The end effector according to claim 1, characterized in that, The cutting blade (30) includes a blade head (31) and a blade shank (32) connected together. The blade head (31) is I-shaped and includes a main body (311) and lugs (312) connected to both ends of the main body (311). The protrusions (301) are connected to the side of the main body (311) near the proximal end of the staple cartridge seat (20).

4. The end effector according to claim 2 or 3, characterized in that, The staple cartridge holder (20) includes a sliding groove (21), and the limiting part (40) is a stop plate disposed on the staple cartridge holder (20) and located near the sliding groove (21). When the cutting blade (30) retracts, the protrusion (301) is inserted between the sliding groove (21) and the stop plate, so that the protrusion (301) abuts against the stop plate, thereby restricting the closing movement of the staple cartridge holder (20) and locking the staple cartridge holder (20) in the open state.

5. The end effector according to claim 4, characterized in that, The sliding groove (21) has a recess (211) at its proximal end, and the stop plate is disposed at the proximal end of the recess (211) such that the opening of the recess (211) has a blocked portion and an opening portion blocked by the stop plate, wherein the opening portion allows the protrusion (301) to enter the recess (211).

6. The end effector according to claim 1, characterized in that, The anvil (10) has two opposing elastic arms (12) at its proximal end. The staple cartridge seat (20) is located at least partially between the two elastic arms (12). The elastic arms (12) include the protrusion (301). The staple cartridge seat (20) has a limiting part (40) on its proximal end and the side wall corresponding to the elastic arm (12). When the staple cartridge seat (20) is in the open state, the protrusion (301) abuts against the limiting part (40) to lock the staple cartridge seat (20) in the open state.

7. The end effector according to claim 1, characterized in that, The cutting blade (30) has an initial position and a free position; when the cutting blade (30) is in the initial position, the limiting part (40) cooperates with the protrusion (301) to lock the staple cartridge seat (20) in the open state; when the cutting blade (30) is in the free position, the limiting part (40) disengages from the protrusion (301) to allow the staple cartridge seat (20) to open and close freely; wherein, the free position is located at a predetermined distance from the initial position near the far end of the staple cartridge seat (20).

8. The end effector according to claim 7, characterized in that, The end effector includes an elastic element (80) located on the anvil (10) or near the end of the nail magazine (90). When the cutting blade (30) retracts to the initial position, the elastic element (80) can accumulate elastic potential energy, which is used to drive the cutting blade (30) forward to the free position.

9. The end effector according to claim 8, characterized in that, Multiple elastic elements (80) are provided, and the multiple elastic elements (80) are arranged in parallel and spaced apart.

10. A stapler, characterized in that, The anastomosis device includes a control handle, a linkage assembly, and an end effector as described in any one of claims 1 to 9.

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