Empty nail bin safety mechanism for endoscope anastomat

Abstract

The utility model relates to an empty nail bin safety mechanism for an endoscope anastomat, which comprises an adapter and a locking assembly, the locking assembly comprises a locking fork and a locking elastic sheet, the adapter is provided with an accommodating space for the locking fork to move, and the locking fork is rotatably connected with the adapter; the locking fork comprises a locking platform and locking side plates, and the locking side plates are connected to the two sides of the locking platform; a locking groove allowing the locking platform to be clamped in is formed in the top of the side, close to the adapter, of the cutting knife pushing plate, the end, away from the locking fork, of the locking groove is a locking end, and an acute angle is formed between the inner side face of the locking end of the locking groove and the inner bottom face of the locking groove. A limiting plane is arranged at the end, away from the locking platform, of the locking side plate, a baffle is arranged at the beveled tail of the nail bin assembly, the limiting plane is located below the baffle, a containing groove for containing the locking elastic piece is formed in the bottom face of the locking side plate, and the locking elastic piece applies acting force to the locking fork to enable the limiting plane to move upwards. The safety of the replaceable staple cartridge assembly in the using process can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of laparoscopic staplers, in particular to an empty nail magazine safety mechanism for laparoscopic staplers. Background Art

[0002] Laparoscopic stapler is a commonly used instrument in laparoscopic surgery.

[0003] The laparoscopic stapler mainly includes a staple cartridge assembly, a cutting knife, a firing assembly, a sleeve part, and a steering head. The staple cartridge assembly includes a staple cartridge seat and a nail anvil seat. Titanium nails are arranged on the staple cartridge seat. The nail anvil seat is rotatably connected to the staple cartridge and forms an openable and closable jaw with the staple cartridge seat. After the staple cartridge seat and the nail anvil seat are closed, the jaws bite and press the organ tissue that needs surgical anastomosis. The shell of the staple cartridge assembly is slidably connected with a bevel, which can push the titanium nail forward. The firing assembly includes a firing handle and a driving structure. After the firing handle is pulled, the firing assembly performs a firing action. The driving mechanism drives the cutting knife and the bevel forward at the same time. The bevel pushes the titanium nail. While the cutting knife cuts the tissue, the titanium nail staples the corresponding tissue.

[0004] When there are no titanium nails in the stapler to suture the tissue, it will cause serious problems such as bleeding and leakage of contents. In order to prevent the instrument from being reused when it is in an empty stapler state, an empty stapler safety mechanism needs to be set in the laparoscopic stapler.

[0005] The safety mechanism is usually located between the stapler magazine assembly and the firing assembly of the laparoscopic stapler. When the stapler magazine is full of nails, the safety mechanism does not prevent the firing assembly from firing. When there are no titanium nails in the stapler magazine, the safety mechanism limits the cutting knife push plate from continuing to move, thereby preventing the firing and cutting action.

[0006] The empty stapler magazine safety mechanisms in the related art are all applicable to situations where the stapler magazine assembly cannot be disassembled and replaced. Therefore, for a laparoscopic stapler with a replaceable stapler magazine, an empty stapler magazine safety mechanism needs to be specifically designed to ensure the safety of the replaceable stapler magazine assembly during use. Utility Model Content

[0007] In order to solve the above technical problems, the present application provides an empty stapler magazine safety mechanism for a laparoscopic stapler.

[0008] The present application provides an empty stapler cartridge safety mechanism for a laparoscopic stapler using the following technical solution:

[0009] An empty stapler cartridge safety mechanism for a laparoscopic stapler, comprising:

[0010] An adapter, one end of which is fixedly connected to the staple cartridge assembly, and the other end of which is rotatably connected to the firing assembly;

[0011] A locking assembly, the locking assembly comprising a locking fork and a locking spring sheet, the adapter being provided with a receiving space for the locking fork to move, the locking fork being rotatably connected to the adapter;

[0012] The locking fork comprises:

[0013] A locking platform, the locking platform is located on a side close to the firing assembly, a locking groove for the locking platform to be inserted into is provided on the top of the cutting knife push plate close to the adapter, the end of the locking groove away from the locking fork is a locking end, the inner side wall of the locking end forms a locking step, and an acute angle is formed between the inner side surface of the locking end of the locking groove and the inner bottom surface of the locking groove;

[0014] A locking side plate, wherein the locking side plate is connected to both sides of the locking platform, and the locking platform is located at one end of the locking side plate in the length direction, a limiting plane is provided at the end of the locking side plate away from the locking platform, a baffle is provided at the oblique tail of the nail magazine assembly, the limiting plane is located below the baffle, and a receiving groove for accommodating a locking spring sheet is provided on the bottom surface of the locking side plate, and the locking spring sheet applies a force on the locking fork to cause the limiting plane to move upward.

[0015] By adopting the above technical solution, when the nail magazine seat is full of titanium nails, the bevel is at the tail of the nail magazine seat, and when the nail magazine seat is full of nails, the shell of the nail magazine assembly is plugged into the adapter and fixed by bolts. At this time, the baffle at the tail of the bevel can be located on the top surface of the locking fork limit platform and exert a relative force on the locking spring sheet. Compared with when the locking spring sheet is in a relaxed state, at this time, the limit platform rotates downward, and the locking fork rotates counterclockwise along its own rotation axis, driving the locking platform to rotate upward by a certain angle, so that the locking platform is located outside the locking groove. At this time, the cutting knife pushes the plate forward to smoothly fire and achieve cutting tissue and stapling tissue.

[0016] When the nail magazine is in an empty state and the bevel is not at the tail end, the locking fork loses the blocking force of the baffle on the limit platform. At this time, the locking side plate is located at one end of the limit platform and is pushed upward by the locking spring. The locking fork rotates clockwise along its own rotation axis, driving the locking platform to rotate downward at a certain angle and then slide into the locking groove. At this time, the locking platform is located at the initial end of the locking groove; at this time, if the firing assembly is actuated, the cutting knife push plate moves forward, and the cutting knife push plate passes through the adapters. Under the action of the locking spring, the locking platform of the locking fork slides to the locking end of the locking groove until the locking platform abuts against the locking step, so that the cutting knife push plate cannot continue to move forward, thereby realizing a safety action to ensure the safety of the replaceable nail magazine assembly during use.

[0017] Preferably, the end of the locking groove close to the locking fork is the initial end, an obtuse angle is formed between the inner side surface of the initial end of the locking groove and the inner bottom surface of the locking groove, and the top edge of the inner side surface of the initial end of the locking groove is rounded.

[0018] By adopting the above technical solution, the smoothness of the locking platform sliding into the locking groove is improved.

[0019] Preferably, a rotating table is provided on each side of the two locking side plates away from each other, and a rotating circular groove for the rotating table to pass through is opened on the inner side walls on both sides of the width direction of the adapter accommodating space, and the rotating table is rotatably arranged in the rotating circular groove.

[0020] By adopting the above technical solution, a limiting guide is provided for the rotation of the locking fork, so that the locking fork can be stably rotatably connected to the adapter.

[0021] Preferably, a first guide chamfer is provided on the bottom surface of the baffle near one end of the locking fork.

[0022] By adopting the above technical solution, the smoothness of the contact between the baffle plate and the limiting platform of the locking side plate is improved.

[0023] Preferably, a second guide chamfer is provided on the top surface of the limiting platform close to one end of the baffle.

[0024] By adopting the above technical solution, the smoothness of the contact between the baffle plate and the limiting platform of the locking side plate is further improved.

[0025] Preferably, the locking platform is horizontally arranged, the locking side plate is vertically arranged, the length direction of the locking platform is perpendicular to the length direction of the locking side plate, the length of the locking platform is greater than the distance between the sides of the two locking side plates that are away from each other, the distance between the sides of the two locking side plates that are close to each other is greater than the thickness of the cutting knife push plate, and the locking groove is located in the middle of the length direction of the locking platform.

[0026] By adopting the above technical solution, the stability of the cooperation between the locking platform of the locking fork and the locking groove is improved, and the possibility of the locking platform slipping out of the locking groove during movement is reduced.

[0027] Preferably, the bottom surface of the locking side plate is arc-shaped.

[0028] Preferably, the adapter comprises a connecting side plate connected to the nail magazine assembly and a connecting top plate connected to the firing assembly, the connecting side plates are connected to both sides of the connecting top plate, and the space between the two connecting side plates forms an accommodating space for the locking fork to move;

[0029] A fixed step is integrally formed on one surface of the two connecting side plates that are close to each other. The locking fork is movable above the fixed step. One end of the locking spring is fixedly connected to the corresponding locking side plate. The other end of the locking spring abuts against the top surface of the fixed step. One locking side plate corresponds to one locking spring.

[0030] Preferably, the shell part of the firing assembly comprises an inner shell and an outer shell, the inner shell is divided into two upper and lower half shells, each of the half shells has a placement groove on its outer wall, a connecting piece is arranged in the placement groove, the connecting piece is "H" shaped, the shape of the placement groove matches the shape of the connecting piece, the outer shell is sleeved on the outside of the inner shell and the connecting piece is pressed into the placement groove;

[0031] A connecting bottom plate is provided below the adapter, the connecting bottom plate and the adapter are riveted together by riveting columns, a connecting column is provided on the top surface of the connecting top plate and the bottom surface of the connecting bottom plate, and a connecting hole for the connecting column to pass through is provided on the connecting sheet;

[0032] The two half shells at one radial end of the inner shell are sealed and connected, and a steering hook is slidably arranged between the two half shells at the other radial end of the inner shell. The head of the steering hook is rotatably connected to the rivet column, and the tail end of the steering hook is connected to the driving structure in the firing assembly. The driving structure can drive the steering hook to slide in a direction close to or away from the nail magazine assembly. When the tail of the rotating hook is subjected to a driving force, the adapter can rotate with the rivet column as the rotating axis.

[0033] Preferably, the shell part of the nail magazine assembly includes a nail magazine seat shell and a nail anvil seat shell, and the nail magazine seat shell and the nail anvil seat shell are overlapped near the adapter, and a fixing hole one is opened on the connecting side plate of the adapter, and a fixing hole two is opened on both side wings of the nail magazine seat shell, and a fixing hole three is opened on both side wings of the nail anvil seat shell, and the fixing hole one, the fixing hole two, and the fixing hole three are all connected, and a knurled pin is arranged in the fixing hole one, and the pin body of the knurled pin and the inner wall of the fixing hole one are interference fit, and the head of the knurled pin is located in the fixing hole two and the fixing hole three.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. For a laparoscopic stapler with a replaceable staple cartridge assembly, the replaceable staple cartridge assembly is fixed by a knurled pin after being plugged into the adapter when full of nails, and the beveled baffle plate abuts against the locking fork of the safety mechanism and limits the action of the safety mechanism. Through the difference in the positions of the bevels in the full and empty nail states, if the stapler is in the empty nail cartridge state, the bevel is not at the tail end, and the locking fork loses the blocking force of the baffle plate on the limit platform. At this time, one end of the locking side plate located at the limit platform is pushed upward by the locking spring, and the locking fork rotates clockwise along its own rotation axis, driving the locking platform to rotate downward by a certain angle and then slide into the locking groove. At this time, if the firing assembly is actuated, the cutting knife push plate moves forward, and the cutting knife push plate passes through between the adapters. Under the action of the locking spring, the locking platform of the locking fork slides to the locking end of the locking groove until the locking platform abuts against the locking step, so that the cutting knife push plate cannot continue to move forward, thereby realizing the safety action, avoiding the firing action of the stapler in the empty nail cartridge state, and ensuring the safety of the replaceable staple cartridge assembly during use;

[0036] 2. The beveled baffle plate has high smoothness when in contact with the limit platform of the locking side plate;

[0037] 3. The locking platform of the locking fork and the locking groove have high matching stability, and the locking platform is not easy to slip out of the locking groove during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of an empty stapler safety mechanism for a laparoscopic stapler in an embodiment of the present application.

[0039] Figure 2 It is a structural schematic diagram used to show that in an embodiment of the present application, the nail magazine is in a full nail state and the baffle abuts against the top surface of the limiting plane to limit the rotation of the locking fork.

[0040] Figure 3 It is a structural schematic diagram used to show that in an embodiment of the present application, the locking fork rotates clockwise until the locking platform slides into the initial end of the locking groove when the nail magazine is empty.

[0041] Figure 4 It is a structural schematic diagram used to show that in an embodiment of the present application, when the firing assembly is actuated and the locking fork moves to a locking step that supports the locking end of the locking groove, in an empty nail magazine state.

[0042] Figure 5 It is a schematic diagram of the structure of the adapter used to illustrate the embodiment of the present application.

[0043] Figure 6 It is a structural schematic diagram used to illustrate the locking assembly in the embodiment of the present application.

[0044] Figure 7 It is a structural schematic diagram used to illustrate beveling in the embodiments of the present application.

[0045] Figure 8 It is a structural schematic diagram used to demonstrate the connection between the adapter and the nail magazine assembly and the firing assembly in the embodiment of the present application.

[0046] Fig. 9 It is a structural schematic diagram used to illustrate the connection between the adapter and the firing assembly in an embodiment of the present application.

[0047] Fig.10 It is a structural schematic diagram used to illustrate the connection between the adapter and the nail magazine assembly in an embodiment of the present application.

[0048] Description of reference numerals: 1. adapter; 11. connecting side plate; 111. accommodating space; 112. fixing step; 113. rotating circular groove; 114. fixing hole 1; 12. connecting top plate; 13. connecting bottom plate; 131. riveting column; 14. connecting column; 2. locking assembly; 21. locking fork; 211. locking platform; 212. locking side plate; 2121. accommodating groove; 2122. rotating circular table; 213. limiting plane; 2131. second guide chamfer; 22. locking spring piece; 3. Nail magazine assembly; 31. Bevel; 311. Baffle; 3111. First guide chamfer; 32. Nail magazine seat shell; 321. Fixing hole two; 33. Nail support seat shell; 331. Fixing hole three; 4. Firing assembly; 41. Cutting knife push plate; 411. Locking groove; 4111. Locking end; 4112. Initial end; 412. Locking step; 42. Inner shell; 421. Half shell; 422. Placement groove; 43. Outer shell; 5. Connecting piece; 6. Steering hook; 7. Knurled pin. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-10 This application is described in further detail.

[0050] An embodiment of the present application discloses an empty stapler cartridge safety mechanism for a laparoscopic stapler.

[0051] Reference Figure 1-10 The empty stapler cartridge safety mechanism for the laparoscopic stapler includes an adapter 1 and a locking assembly 2. The adapter 1 includes a connecting side plate 11 connected to the stapler cartridge assembly 3 and a connecting top plate 12 connected to the firing assembly 4. The connecting side plates 11 are integrally formed on both sides of the connecting top plate 12. The connecting side plates 11 and the shell at the rear of the stapler cartridge assembly 3 are fixed by bolts. The end of the adapter 1 away from the stapler cartridge assembly 3 is rotatably connected to the firing assembly 4.

[0052] The locking assembly 2 includes a locking fork 21 and a locking spring sheet 22 . An accommodating space 111 for the locking fork 21 to move is formed between the two connecting side plates 11 . The locking fork 21 is rotatably connected to the adapter 1 .

[0053] The locking fork 21 includes a locking platform 211 and a locking side plate 212. The locking platform 211 is located on a side close to the firing assembly 4. The locking side plates 212 are integrally formed on both sides of the locking platform, and the locking platform 211 is located at one end of the length direction of the locking side plate 212. A locking groove 411 for the locking platform 211 to be inserted is provided at the top of the cutting knife push plate 41 close to the adapter 1. The end of the locking groove 411 away from the locking fork 21 is a locking end 4111. The inner side wall of the locking end 4111 forms a locking step 412. The inner side surface of the locking end 4111 of the locking groove 411 forms an acute angle with the inner bottom surface of the locking groove 411, which is used to clamp the locking platform 211.

[0054] A limiting plane 213 is provided at one end of the locking side plate 212 away from the locking platform 211, and a baffle 311 is provided at the tail of the chamfer 31 of the nail magazine assembly 3. Two baffles 311 are provided, and there is a gap between the two baffles 311 for the firing block to penetrate. The limiting plane 213 is located below the baffle 311, and a receiving groove 2121 for receiving the locking spring sheet 22 is provided on the bottom surface of the locking side plate 212. The locking spring sheet 22 exerts a force on the locking fork 21 to move the limiting plane 213 upward.

[0055] A fixed step 112 is integrally formed on each of the surfaces of the two connecting side plates 11 that are close to each other, and the fixed step 112 is located at the lower part of the height direction of the connecting side plate 11. The bottom surface of the locking side plate 212 is arranged in an arc shape, and the locking fork 21 is located above the fixed step 112 for movement. One end of the locking spring 22 is fixedly connected to the corresponding locking side plate 212, and the other end of the locking spring 22 abuts against the top surface of the fixed step 112, and one locking side plate 212 corresponds to one locking spring 22.

[0056] A rotating table 2122 is provided on each side of the two locking side plates 212 that are away from each other. A rotating circular groove 113 for the rotating table 2122 to penetrate is opened on the inner side walls on both sides of the width direction of the accommodating space 111 of the adapter 1. The rotating table 2122 is rotatably arranged in the rotating circular groove 113, providing a limiting guide for the rotation of the locking fork 21, so that the locking fork 21 can be stably rotatably connected to the adapter 1.

[0057] When the nail magazine seat is full of titanium nails, the bevel 31 is at the tail end of the nail magazine seat. When the nail magazine seat is full of nails, the shell of the nail magazine assembly 3 is plugged into the adapter 1 and fixed by bolts. At this time, the baffle 311 at the tail end of the bevel 31 can be located on the top surface of the limiting platform of the locking fork 21 and exert a relative force on the locking spring piece 22. Compared with when the locking spring piece 22 is in a relaxed state, the limiting platform rotates downward at this time, and the locking fork 21 rotates counterclockwise along its own rotating axis, driving the locking platform 211 to rotate upward by a certain angle, so that the locking platform 211 is located outside the locking groove 411. At this time, the cutting knife pushes the plate 41 forward to smoothly fire to achieve cutting and stapling of tissues.

[0058] When the nail magazine is in the empty nail magazine state, the bevel 31 is not at the tail end, and the locking fork 21 loses the blocking force of the baffle plate 311 on the limit platform. At this time, the locking side plate 212 is located at one end of the limit platform and is pushed up by the locking spring, and the locking fork 21 rotates clockwise along its own rotation axis, driving the locking platform 211 to rotate downward by a certain angle and then slide into the locking groove 411. At this time, the locking platform 211 is located at the initial end 4112 of the locking groove 411; at this time, if the firing assembly 4 is actuated, the cutting knife push plate 41 moves forward, and the cutting knife push plate 41 passes through the adapter 1. Under the action of the locking spring piece 22, the locking platform 211 of the locking fork 21 slides to the locking end 4111 of the locking groove 411 until the locking platform 211 abuts against the locking step 412, so that the cutting knife push plate 41 cannot continue to move forward, thereby realizing the safety action to ensure the safety of the replaceable nail magazine assembly 3 during use.

[0059] The end of the locking groove 411 close to the locking fork 21 is the initial end 4112, and an obtuse angle is formed between the inner side surface of the initial end 4112 of the locking groove 411 and the inner bottom surface of the locking groove 411, and the top edge of the inner side surface of the initial end 4112 of the locking groove 411 is rounded, thereby improving the smoothness of the locking platform 211 sliding into the locking groove 411.

[0060] A first guide chamfer 3111 is provided on the bottom surface of one end of the baffle plate 311 close to the locking fork 21 , so as to improve the smoothness of the contact between the baffle plate 311 and the limiting platform of the locking side plate 212 .

[0061] A second guide chamfer 2131 is provided on the top surface of the limiting platform near one end of the baffle plate 311 , which further improves the smoothness of contact between the baffle plate 311 and the limiting platform of the locking side plate 212 .

[0062] The locking platform 211 is horizontally arranged, and the locking side plate 212 is vertically arranged. The length direction of the locking platform 211 is perpendicular to the length direction of the locking side plate 212. The length of the locking platform 211 is greater than the distance between the sides of the two locking side plates 212 that are away from each other. The distance between the sides of the two locking side plates 212 that are close to each other is greater than the thickness of the cutting knife pushing plate 41. The locking groove 411 is located in the middle of the length direction of the locking platform 211, which improves the stability of the cooperation between the locking platform 211 and the locking groove 411 of the locking fork 21, and reduces the possibility of the locking platform 211 slipping out of the locking groove 411 during movement.

[0063] The shell part of the firing assembly 4 includes an inner shell 42 and an outer shell 43. The inner shell 42 is divided into two upper and lower half shells 421. A placement groove 422 is opened on the outer wall of each half shell 421. The placement groove 422 runs through the side of the half shell 421 close to the adapter 1. A connecting piece 5 is arranged in the placement groove 422. The connecting piece 5 is "H"-shaped. The shape of the placement groove 422 is adapted to the shape of the connecting piece 5. The outer shell 43 is sleeved on the outside of the inner shell 42 and presses the connecting piece 5 into the placement groove 422.

[0064] A connecting base plate 13 is provided below the adapter 1, and the connecting base plate 13 and the adapter 1 are riveted together by riveting columns 131. A connecting column 14 is provided on the top surface of the connecting top plate 12 and the bottom surface of the connecting base plate 13. A connecting hole for the connecting column 14 to pass through is opened on the connecting plate 5. By placing the connecting plate 5 in the placement groove 422 and passing the connecting column 14 through the connecting hole, the adapter 1 can be rotatably connected to the firing assembly 4.

[0065] The two half shells 421 at one radial end of the inner shell 42 are sealed and connected, and a steering hook 6 is slidably arranged between the two half shells 421 at the other radial end of the inner shell 42. The head of the steering hook 6 is rotatably connected to the rivet column 131, and the tail end of the steering hook 6 is connected to the driving structure in the firing assembly 4. The driving structure can drive the steering hook 6 to slide toward or away from the staple cartridge assembly 3. When the tail of the rotating hook is subjected to a driving force, the adapter 1 can rotate with the rivet column 131 as the rotation axis. The driving structure here is any driving structure in the prior art that can drive the staple cartridge assembly 3 of the laparoscopic stapler to turn, so it will not be repeated here.

[0066] The shell part of the nail magazine assembly 3 includes a nail magazine seat shell 32 and a nail anvil shell 33. The nail magazine seat shell 32 and the nail anvil shell 33 are overlapped near the adapter 1. A fixing hole 114 is opened on the connecting side plate 11 of the adapter 1, and fixing holes 2 321 are opened on both side wings of the nail magazine seat shell 32. Fixing holes 331 are opened on both side wings of the nail anvil shell 33. The fixing holes 114, 2 321 and 331 are all connected. A knurled pin 7 is arranged in the fixing hole 114. The pin body of the knurled pin 7 and the inner wall of the fixing hole 114 are interference fit. The head of the knurled pin 7 is located in the fixing hole 2 321 and the fixing hole 331. The knurled pin 7 is inserted into the fixing hole 331, the fixing hole 2 321 and the fixing hole 1 114 so that the pin body of the knurled pin 7 and the inner wall of the fixing hole 1 114 are interference fit, and the adapter 1 can be fixed to the nail magazine assembly 3.

[0067] The implementation principle of an empty stapler cartridge safety mechanism for a laparoscopic stapler in the present application embodiment is as follows:

[0068] When the nail magazine seat is full of titanium nails, the bevel 31 is at the tail of the nail magazine seat. When the nail magazine seat is full of nails, the shell of the nail magazine assembly 3 is plugged into the adapter 1 and fixed by bolts. The baffle 311 at the tail of the bevel 31 is located on the top surface of the limiting platform of the locking fork 21 and exerts a relative force on the locking spring piece 22. Compared with when the locking spring piece 22 is in a relaxed state, the limiting platform rotates downward at this time, and the locking fork 21 rotates counterclockwise along its own rotation axis, driving the locking platform 211 to rotate upward by a certain angle, so that the locking platform 211 is located outside the locking groove 411. At this time, the cutting knife pushes the plate 41 forward to smoothly fire and achieve the purpose of cutting the tissue and stapling the tissue.

[0069] When the nail magazine is in the empty nail magazine state, the bevel 31 is not at the tail end, and the locking fork 21 loses the blocking force of the baffle plate 311 on the limit platform. At this time, the locking side plate 212 is located at one end of the limit platform and is pushed up by the locking spring, and the locking fork 21 rotates clockwise along its own rotation axis, driving the locking platform 211 to rotate downward by a certain angle and then slide into the locking groove 411. At this time, the locking platform 211 is located at the initial end 4112 of the locking groove 411; at this time, if the firing assembly 4 is actuated, the cutting knife push plate 41 moves forward, and the cutting knife push plate 41 passes through the adapter 1. Under the action of the locking spring piece 22, the locking platform 211 of the locking fork 21 slides to the locking end 4111 of the locking groove 411 until the locking platform 211 abuts against the locking step 412, so that the cutting knife push plate 41 cannot continue to move forward, thereby realizing the safety action to ensure the safety of the replaceable nail magazine assembly 3 during use.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An empty stapler cartridge safety mechanism for a laparoscopic stapler, characterized in that: include: An adapter (1), one end of the adapter (1) being fixedly connected to the nail magazine assembly (3), and the other end of the adapter (1) being rotatably connected to the firing assembly (4); A locking assembly (2), the locking assembly (2) comprising a locking fork (21) and a locking spring (22), the adapter (1) being provided with a receiving space (111) for movement of the locking fork (21), the locking fork (21) being rotatably connected to the adapter (1); The locking fork (21) comprises: A locking platform (211), the locking platform (211) being located on a side close to the firing assembly (4), a locking groove (411) for the locking platform (211) to be inserted into is provided on the top of the cutting knife push plate (41) close to the adapter (1), the end of the locking groove (411) away from the locking fork (21) being a locking end (4111), the inner side wall of the locking end (4111) forming a locking step (412), and an acute angle being formed between the inner side surface of the locking end (4111) of the locking groove (411) and the inner bottom surface of the locking groove (411); A locking side plate (212), the locking side plate (212) is connected to both sides of the locking platform, and the locking platform (211) is located at one end of the locking side plate (212) in the length direction, and a limiting plane (213) is provided at one end of the locking side plate (212) away from the locking platform (211), a baffle (311) is provided at the tail of the chamfer (31) of the nail magazine assembly (3), and the limiting plane (213) is located below the baffle (311), and a receiving groove (2121) for receiving a locking spring sheet (22) is provided on the bottom surface of the locking side plate (212), and the locking spring sheet (22) exerts a force on the locking fork (21) to move the limiting plane (213) upward.

2. The empty staple cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: The end of the locking groove (411) close to the locking fork (21) is an initial end (4112), an inner side surface of the initial end (4112) of the locking groove (411) and an inner bottom surface of the locking groove (411) form an obtuse angle, and the top edge of the inner side surface of the initial end (4112) of the locking groove (411) is rounded.

3. The empty cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: A rotating circular table (2122) is respectively provided on one side of the two locking side plates (212) that is away from each other, and a rotating circular groove (113) for the rotating circular table (2122) to penetrate is provided on the inner side walls on both sides of the width direction of the accommodating space (111) of the adapter (1), and the rotating circular table (2122) is rotatably arranged in the rotating circular groove (113).

4. The empty cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: A first guide chamfer (3111) is provided on the bottom surface of the baffle (311) at one end close to the locking fork (21).

5. The empty staple cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: A second guide chamfer (2131) is provided on the top surface of the limiting plane (213) close to one end of the baffle (311).

6. The empty staple cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: The locking platform (211) is arranged horizontally, and the locking side plate (212) is arranged vertically. The length direction of the locking platform (211) is perpendicular to the length direction of the locking side plate (212). The length of the locking platform (211) is greater than the distance between the two sides of the locking side plates (212) that are away from each other. The distance between the two sides of the locking side plates (212) that are close to each other is greater than the thickness of the cutting knife pushing plate (41). The locking groove (411) is located in the middle of the length direction of the locking platform (211).

7. The empty cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: The bottom surface of the locking side plate (212) is arranged in an arc shape.

8. The empty cartridge safety mechanism for a laparoscopic stapler according to claim 1, characterized in that: The adapter (1) comprises a connecting side plate (11) connected to the nail magazine assembly (3) and a connecting top plate (12) connected to the firing assembly (4); the connecting side plate (11) is connected to both sides of the connecting top plate (12); and the space between the two connecting side plates (11) forms an accommodating space (111) for the locking fork (21) to move. A fixed step (112) is integrally formed on each of the surfaces of the two connecting side plates (11) that are close to each other, the locking fork (21) is movably located above the fixed step (112), one end of the locking spring sheet (22) is fixedly connected to the corresponding locking side plate (212), the other end of the locking spring sheet (22) is in contact with the top surface of the fixed step (112), and one locking side plate (212) corresponds to one locking spring sheet (22).

9. The empty staple cartridge safety mechanism for a laparoscopic stapler according to claim 8, characterized in that: The shell part of the firing assembly (4) comprises an inner shell (42) and an outer shell (43), wherein the inner shell (42) is divided into two upper and lower half shells (421), and a placement groove (422) is provided on the outer wall of each half shell (421), and a connecting piece (5) is provided in the placement groove (422), and the connecting piece (5) is in an "H" shape, and the shape of the placement groove (422) is adapted to the shape of the connecting piece (5), and the outer shell (43) is sleeved on the outside of the inner shell (42) and presses the connecting piece (5) into the placement groove (422); A connecting bottom plate (13) is provided below the adapter (1), the connecting bottom plate (13) and the adapter (1) are riveted together via a riveting column (131), a connecting column (14) is provided on the top surface of the connecting top plate (12) and on the bottom surface of the connecting bottom plate (13), and a connecting hole for the connecting column (14) to pass through is provided on the connecting sheet (5); The two half shells (421) at one radial end of the inner shell (42) are sealed and connected, and a steering hook (6) is slidably arranged between the two half shells (421) at the other radial end of the inner shell (42). The head of the steering hook (6) is rotatably connected to the rivet column (131), and the tail end of the steering hook (6) is connected to the driving structure in the firing assembly (4). The driving structure can drive the steering hook (6) to slide in a direction close to or away from the nail magazine assembly (3). When the tail end of the steering hook (6) is subjected to a driving force, the adapter (1) can rotate with the rivet column (131) as the rotation axis.

10. The empty staple cartridge safety mechanism for a laparoscopic stapler according to claim 8, characterized in that: The shell part of the nail magazine assembly (3) comprises a nail magazine seat shell (32) and a nail support seat shell (33), wherein the nail magazine seat shell (32) and the nail support seat shell (33) are overlapped near the adapter (1), a fixing hole (114) is provided on the connecting side plate (11) of the adapter (1), a fixing hole (2) (321) is provided on both side wings of the nail magazine seat shell (32), and a fixing hole (331) is provided on both side wings of the nail support seat shell (33), wherein the fixing hole (114), the fixing hole (2) (321) and the fixing hole (331) are all connected, a knurled pin (7) is provided in the fixing hole (114), the pin body of the knurled pin (7) and the inner wall of the fixing hole (114) are interference fit, and the head of the knurled pin (7) is located in the fixing hole (2) (321) and the fixing hole (331).

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