Cutting knife convenient to disassemble and assemble for cutting anastomat

Abstract

The utility model belongs to the technical field of cutting knives for cutting anastomats, and particularly relates to a cutting knife convenient to disassemble and assemble for a cutting anastomat, which comprises a knife head and two first inserting grooves, the two first inserting grooves are symmetrically arranged on the inner wall of the knife head, a second inserting groove is arranged on the inner wall of the knife head, two first inserting blocks are respectively inserted into the two first inserting grooves, and two second inserting blocks are respectively inserted into the second inserting grooves. Limiting grooves communicating with the outside are formed in the first inserting blocks, a blade is inserted between the two limiting grooves, and one side of the blade extends into the second inserting groove and is matched with the second inserting groove in an inserted mode. The two first sliding grooves are symmetrically formed in the cutter head and are communicated with the two first inserting grooves respectively, and inserting rods are connected into the first sliding grooves in a sliding mode. The cutting knife solves the problems that when a user uses the cutting knife for the endoscope cutting anastomat to conduct an operation, abrasion, breakage and the like occur, the user cannot rapidly disassemble and assemble the blade, and the cutting knife is not prone to damage. The operation progress is influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting knives for cutting staplers, and particularly relates to a cutting knife for a cutting stapler which is convenient for disassembly and assembly. Background Technique

[0002] The cutting knife in a cutting stapler is the main part for cutting tissues. This cutting knife can complete the cutting operation quickly and accurately, and is one of the key components for the cutting stapler to realize its function.

[0003] During the operation, the cutting stapler is used to cut and anastomose specific cavity organs or tissues in the body. The cutting knife plays a crucial role in this process. It can ensure the accuracy and efficiency of cutting, while maintaining the safety and reliability of the operation process.

[0004] For example, the Chinese patent with the publication number CN217987663U discloses a cutting knife for a laparoscopic cutting stapler, which includes a stapler main body. A pushing connecting rod is arranged on the stapler main body. A pushing knife plate is arranged inside the pushing connecting rod. One end of the pushing knife plate is provided with a knife head, and the other end is provided with a connecting head. The knife head is fixedly connected with the pushing knife plate, and the connecting head is detachably connected with the pushing knife plate. A knife groove is opened on the knife head, and a blade is arranged in the knife groove. Arc heads are arranged at both the upper and lower ends of the knife head, and a wavy surface is opened on the inner surface of the arc head. By arranging the replacement structure of the cutting knife at the connecting head part and restricting the movement through the pushing connecting rod of the stapler main body, the installation is more stable. By changing the shape of the contact surface between both ends of the knife head and the outside, the movement of the knife head is smoother, which is beneficial to the stable progress of cutting.

[0005] The above patent has the following problems:

[0006] When this patent is used, there are some disadvantages. For example, the knife head and the blade on the cutting knife for the cutting stapler are fixed together. When the user uses the cutting knife for the laparoscopic cutting stapler during the operation and there are situations such as wear and fracture, the user cannot quickly disassemble and assemble the blade, which affects the progress of the operation. In view of this, we propose a cutting knife for a cutting stapler which is convenient for disassembly and assembly. Content of the Utility Model

[0007] The purpose of the utility model is to provide a cutting knife for a cutting stapler which is convenient for disassembly and assembly, so as to solve the problems put forward in the above background technique.

[0008] In view of this, the utility model provides a cutting knife for a cutting stapler which is convenient for disassembly and assembly, including:

[0009] A cutter head and two first slots, the two first slots are symmetrically formed on the inner wall of the cutter head, a second slot is formed on the inner wall of the cutter head, two first inserts are respectively inserted into the two first slots, a limiting slot communicating with the outside is formed on the first insert, a blade is inserted between the two limiting slots, and one side of the blade extends into the second slot and is inserted and matched with the second slot;

[0010] Two first sliding grooves, the two first sliding grooves are symmetrically formed in the cutter head and respectively communicate with the two first slots, a plug rod is slidably connected in the first sliding groove, and one end of the plug rod penetrates through the first insert and extends into the first insert to be inserted and matched with the first insert, an extrusion groove is formed on the plug rod, and the other end of the plug rod is fixedly connected with a first spring fixed to the inner wall of the first sliding groove;

[0011] An extrusion assembly, the extrusion assembly is located in the cutter head and is used for extruding the two extrusion grooves.

[0012] Based on the above structure, by setting the first slot and the first insert, it is ensured that the first insert can be inserted into the first slot. By setting the second slot, the limiting slot and the blade, it is ensured that the blade can be inserted between the two limiting slots, and at the same time, one side of the blade can be inserted into the second slot. By setting the first sliding groove, the plug rod and the extrusion groove, it is ensured that one end of the plug rod can be inserted into the first insert along the first sliding groove under the action of the elastic force of the extrusion groove, fixing the first insert in the first slot and preventing it from moving, and enabling the two first inserts to fix the blade at the position between the second slot and the two limiting slots. By setting the extrusion assembly, it is ensured that the user can respectively extrude the two extrusion grooves through the extrusion assembly, causing the two extrusion grooves to drive one end of the two plug rods to move respectively, so that the two plug rods release the fixation of the two first inserts, ensuring that the user can quickly disassemble and assemble the blade.

[0013] In the above technical solution, further, the extrusion assembly includes:

[0014] A second sliding groove, the second sliding groove is formed in the cutter head and communicates with the two first sliding grooves, an extrusion rod is slidably connected in the second sliding groove, and both ends of the extrusion rod respectively extend into the two extrusion grooves, a threaded rod is threadedly connected in the extrusion rod, and the threaded rod is located in the second sliding groove and is rotatably connected with the second sliding groove;

[0015] An activity groove, the activity groove is formed in the cutter head, a first sprocket and a second sprocket are rotatably connected in the activity groove, one end of the first sprocket penetrates through the inner wall of the activity groove and extends into the second sliding groove to be fixedly connected with one end of the threaded rod, a chain is engaged between the first sprocket and the second sprocket, a rotating block is fixedly connected to the second sprocket, and one end of the rotating block penetrates through the inner wall of the activity groove and extends to the outside to be rotatably connected with the cutter head;

[0016] The fixing assembly is located in the cutter head and is used to fix the rotating block.

[0017] In this technical solution, it is ensured that the user can fix the two first plug-in blocks in the two first slots respectively and cannot move them.

[0018] In the above technical solution, further, both ends of the extrusion rod are respectively plugged into and matched with the two extrusion grooves.

[0019] In this technical solution, it is ensured that both ends of the extrusion rod can be inserted into the two extrusion grooves respectively.

[0020] In the above technical solution, further, one end of the first sprocket is rotatably connected to the second slide groove.

[0021] In this technical solution, it is ensured that one end of the first sprocket can rotate normally in the second sliding groove.

[0022] In the above technical solution, further, the extrusion rod is in the shape of a Chinese character "匸", and both ends of the extrusion rod are arranged at an incline.

[0023] In this technical solution, it is ensured that the two ends of the extrusion rod can respectively extrude the two extrusion grooves.

[0024] In the above technical solution, further, the fixing assembly includes:

[0025] The third slide groove is provided in the cutter head and is connected to the outside world, a second plug block is slidably connected in the third slide groove, and one end of the second plug block passes through the rotating block and extends into the rotating block to be plugged into the rotating block, a second spring fixed to the inner wall of the third slide groove is fixedly connected to the second plug block, a pressing block is fixedly connected to the second plug block, and one end of the pressing block passes through the inner wall of the third slide groove and extends to the outside world to be slidably connected to the cutter head.

[0026] In this technical solution, it is ensured that the rotating block will not rotate due to external influences.

[0027] The beneficial effects of the utility model are:

[0028] 1. The cutting knife for a conveniently disassembled and assembled stapler, through the provided first slot and first insert block, ensures that the first insert block can be inserted into the first slot. Through the provided second slot, limiting slot and blade, ensures that the blade can be inserted between the two limiting slots, and at the same time, one side of the blade can be inserted into the second slot. Through the provided first chute, insertion rod and extrusion groove, ensures that one end of the insertion rod can be inserted into the first insert block along the first chute under the action of the elastic force of the extrusion groove, fixing the first insert block in the first slot and preventing it from moving, and enabling the two first insert blocks to fix the blade at the position between the second slot and the two limiting slots. Through the provided extrusion assembly, ensures that the user can respectively extrude the two extrusion grooves through the extrusion assembly, driving one end of the two insertion rods to move respectively, so that the two insertion rods release the fixation of the two first insert blocks, ensuring that the user can quickly disassemble and assemble the blade, and solving the problem that when the user uses the cutting knife for a laparoscopic stapler in surgery and there are situations such as wear and fracture, the user cannot quickly disassemble and assemble the blade, affecting the progress of the surgery.

[0029] 2. The cutting knife for a conveniently disassembled and assembled stapler, through the provided fixing assembly and rotating block, ensures that the user can fix the rotating block through the fixing assembly to prevent the rotating block from rotating under the influence of the outside world. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the overall structural schematic diagram of the present utility model;

[0031] Figure 2 is one of the internal structural schematic diagrams of the first slot of the present utility model;

[0032] Figure 3 is the other internal structural schematic diagram of the first slot of the present utility model;

[0033] Figure 4 is Figure 2 the enlarged structural schematic diagram at A in

[0034] The marks in the figure are shown as:

[0035] 1. Knife head; 2. First slot; 3. Second slot; 4. First insert block; 5. Limiting slot; 6. Blade; 7. First chute; 8. Insertion rod; 9. Extrusion groove; 10. First spring; 11. Second chute; 12. Extrusion rod; 13. Threaded rod; 14. Activity slot; 15. First sprocket; 16. Second sprocket; 17. Chain; 18. Rotating block; 19. Third chute; 20. Second insert block; 21. Second spring; 22. Pressing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0037] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object may be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0039] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0040] It should be noted that in this application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0041] Embodiment 1:

[0042] Please refer to Figure 1 - Figure 4 as shown, this embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly, including:

[0043] A cutter head 1 and two first slots 2, the two first slots 2 are symmetrically opened on the inner wall of the cutter head 1, a second slot 3 is opened on the inner wall of the cutter head 1, two first inserts 4 are respectively inserted into the two first slots 2, a limiting groove 5 communicating with the outside is opened on the first insert 4, a blade 6 is inserted between the two limiting grooves 5, and one side of the blade 6 extends into the second slot 3 and is inserted and matched with the second slot 3;

[0044] Two first chutes 7, the two first chutes 7 are symmetrically opened in the cutter head 1 and are respectively communicated with the two first slots 2, a plug rod 8 is slidably connected in the first chute 7, and one end of the plug rod 8 penetrates through the first insert 4 and extends into the first insert 4 to be inserted and matched with the first insert 4, an extrusion groove 9 is opened on the plug rod 8, and the other end of the plug rod 8 is fixedly connected with a first spring 10 fixed to the inner wall of the first chute 7;

[0045] An extrusion assembly, the extrusion assembly is located in the cutter head 1 and is used for extruding the two extrusion grooves 9.

[0046] Embodiment 2:

[0047] This embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The extrusion assembly includes:

[0048] The second sliding groove 11 is opened in the cutter head 1 and communicates with the two first sliding grooves 7. A pressing rod 12 is slidably connected in the second sliding groove 11, and both ends of the pressing rod 12 extend into the two pressing grooves 9 respectively. A threaded rod 13 is threadedly connected in the pressing rod 12, and the threaded rod 13 is located in the second sliding groove 11 and is rotatably connected to the second sliding groove 11;

[0049] The movable groove 14 is opened in the cutter head 1. A first sprocket 15 and a second sprocket 16 are rotatably connected in the movable groove 14. One end of the first sprocket 15 penetrates through the inner wall of the movable groove 14 and extends into the second sliding groove 11 to be fixed to one end of the threaded rod 13. A chain 17 is engaged between the first sprocket 15 and the second sprocket 16. A rotating block 18 is fixedly connected to the second sprocket 16, and one end of the rotating block 18 penetrates through the inner wall of the movable groove 14 and extends to the outside to be rotatably connected to the cutter head 1;

[0050] The fixing assembly is located in the cutter head 1 and is used to fix the rotating block 18.

[0051] Among them, the user rotates the rotating block 18 by hand, so that the rotating block 18 drives the second sprocket 16 to rotate in the movable groove 14, so that the second sprocket 16 drives the first sprocket 15 to rotate in the movable groove 14 through the chain 17, and the first sprocket 15 drives the threaded rod 13 to rotate in the second sliding groove 11. When the threaded rod 13 rotates, the pressing rod 12 will move under the action of the thread of the threaded rod 13, so that both ends of the pressing rod 12 respectively press the two pressing grooves 9, so that one ends of the two inserting rods 8 respectively enter the two first sliding grooves 7 from the two first inserting blocks 4, and the other ends of the two inserting rods 8 respectively compress the two first springs 10. At this time, the fixation of the two first inserting blocks 4 is released. Then, the user pulls out the two first inserting blocks 4 from the two first inserting slots 2 by hand, and then the user pulls out one side of the blade 6 from the second inserting slot 3 for replacement. After the replacement is completed, the user inserts one side of the replaced blade 6 into the second inserting slot 3 by hand. Subsequently, the user inserts the two first inserting blocks 4 into the two first inserting slots 2 respectively. When the two first inserting blocks 4 are respectively inserted into the two first inserting slots 2, the blade 6 will also be inserted between the two limiting slots 5. Then, the user rotates the rotating block 18 reversely by hand, so that the rotating block 18 drives the second sprocket 16 to rotate reversely in the movable groove 14, so that the second sprocket 16 drives the first sprocket 15 to rotate reversely in the movable groove 14 through the chain 17, and the first sprocket 15 drives the threaded rod 13 to rotate reversely in the second sliding groove 11. When the threaded rod 13 rotates reversely, the pressing rod 12 will move reversely under the action of the thread of the threaded rod 13, so that both ends of the pressing rod 12 respectively release the extrusion of the two pressing grooves 9, so that one ends of the two inserting rods 8 respectively receive the rebounding force of the two first springs 10 and insert into the two first inserting blocks 4 from the two first sliding grooves 7, ensuring that the user can fix the two first inserting blocks 4 respectively in the two first inserting slots 2 and cannot move.

[0052] Example 3:

[0053] This embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly. In addition to including the technical solutions of the above embodiments, it also has the following technical features: both ends of the extrusion rod 12 are inserted and matched with two extrusion grooves 9 respectively.

[0054] Among them, it is ensured that both ends of the extrusion rod 12 can be respectively inserted into the two extrusion grooves 9.

[0055] Example 4:

[0056] This embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly. In addition to including the technical solutions of the above embodiments, it also has the following technical features: one end of the first sprocket 15 is rotatably connected to the second sliding groove 11.

[0057] Among them, it is ensured that one end of the first sprocket 15 can rotate normally in the second sliding groove 11.

[0058] Example 5:

[0059] This embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly. In addition to including the technical solutions of the above embodiments, it also has the following technical features: the extrusion rod 12 is in an "n" shape, and both ends of the extrusion rod 12 are inclined.

[0060] Among them, it is ensured that both ends of the extrusion rod 12 can respectively extrude the two extrusion grooves 9.

[0061] Example 6:

[0062] This embodiment provides a cutting knife for a cutting stapler that is convenient for disassembly and assembly. In addition to including the technical solutions of the above embodiments, it also has the following technical features: the fixing component includes:

[0063] A third sliding groove 19 is opened in the cutter head 1 and communicates with the outside. A second insertion block 20 is slidably connected in the third sliding groove 19. One end of the second insertion block 20 passes through the rotating block 18 and extends into the rotating block 18 to be inserted and matched with the rotating block 18. A second spring 21 fixed to the inner wall of the third sliding groove 19 is fixedly connected to the second insertion block 20. A pressing block 22 is fixedly connected to the second insertion block 20. One end of the pressing block 22 passes through the inner wall of the third sliding groove 19 and extends to the outside to be slidably connected to the cutter head 1.

[0064] Among them, when the user needs to rotate the rotating block 18, the user presses the pressing block 22 with the hand, so that the pressing block 22 drives the second inserting block 20 to slide in the third sliding groove 19, enabling one end of the second inserting block 20 to enter the third sliding groove 19 from the rotating block 18, and compressing the second spring 21 by the second inserting block 20. At this time, the fixation of the rotating block 18 is released. When the rotating block 18 needs to be fixed after resetting, the user releases the hand pressing the pressing block 22, so that one end of the second inserting block 20 is inserted into the rotating block 18 under the action of the rebounding force of the second spring 21, fixing the rotating block 18 to ensure that the rotating block 18 will not rotate under the influence of the outside world.

[0065] When the user needs to replace the blade 6, the user presses the pressing block 22 by hand, so that the pressing block 22 drives the second insertion block 20 to slide in the third sliding groove 19, making one end of the second insertion block 20 enter the third sliding groove 19 from the rotating block 18, and compressing the second spring 21 by the second insertion block 20. At this time, the fixation of the rotating block 18 is released. Subsequently, the user rotates the rotating block 18 by hand, so that the rotating block 18 drives the second sprocket 16 to rotate in the movable groove 14, making the second sprocket 16 drive the first sprocket 15 to rotate in the movable groove 14 through the chain 17, and making the first sprocket 15 drive the threaded rod 13 to rotate in the second sliding groove 11. When the threaded rod 13 rotates, the extrusion rod 12 will move under the action of the thread of the threaded rod 13, making both ends of the extrusion rod 12 respectively extrude the two extrusion grooves 9, so that one end of each of the two insertion rods 8 enters the two first sliding grooves 7 from the two first insertion blocks 4 respectively, and compressing the two first springs 10 by the other ends of the two insertion rods 8 respectively. At this time, the fixation of the two first insertion blocks 4 is released. Subsequently, the user pulls out the two first insertion blocks 4 from the two first slots 2 by hand, and then the user pulls out one side of the blade 6 from the second slot 3 for replacement. After the replacement is completed, the user inserts one side of the replaced blade 6 into the second slot 3 by hand. Subsequently, the user inserts the two first insertion blocks 4 into the two first slots 2 respectively. When the two first insertion blocks 4 are respectively inserted into the two first slots 2, the blade 6 will also be inserted between the two limiting slots 5. Subsequently, the user reversely rotates the rotating block 18 by hand, so that the rotating block 18 drives the second sprocket 16 to reversely rotate in the movable groove 14, making the second sprocket 16 drive the first sprocket 15 to reversely rotate in the movable groove 14 through the chain 17, and making the first sprocket 15 drive the threaded rod 13 to reversely rotate in the second sliding groove 11. When the threaded rod 13 reversely rotates, the extrusion rod 12 will move reversely under the action of the thread of the threaded rod 13, making both ends of the extrusion rod 12 respectively release the extrusion of the two extrusion grooves 9, so that one end of each of the two insertion rods 8 is respectively inserted into the two first insertion blocks 4 from the two first sliding grooves 7 under the action of the rebounding force of the two first springs 10, ensuring that the user can fix the two first insertion blocks 4 respectively in the two first slots 2 and cannot move. Subsequently, the user releases the hand pressing the pressing block 22, making one end of the second insertion block 20 insert into the rotating block 18 under the action of the rebounding force of the second spring 21, and fixing the rotating block 18 to ensure that the rotating block 18 will not be affected by the outside and rotate.

[0066] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A cutting knife for a cutting stapler that is convenient for disassembly and assembly, characterized in that, Comprising: A cutter head (1) and two first slots (2), the two first slots (2) are symmetrically opened on the inner wall of the cutter head (1), a second slot (3) is opened on the inner wall of the cutter head (1), two first inserts (4) are respectively inserted into the two first slots (2), a limiting slot (5) communicating with the outside is opened on the first insert (4), a blade (6) is inserted between the two limiting slots (5), and one side of the blade (6) extends into the second slot (3) and is inserted and matched with the second slot (3); Two first chutes (7), the two first chutes (7) are symmetrically opened in the cutter head (1) and are respectively communicated with the two first slots (2), a plug rod (8) is slidably connected in the first chute (7), and one end of the plug rod (8) penetrates through the first insert (4) and extends into the first insert (4) to be inserted and matched with the first insert (4), an extrusion groove (9) is opened on the plug rod (8), and the other end of the plug rod (8) is fixedly connected with a first spring (10) fixed to the inner wall of the first chute (7); An extrusion assembly, the extrusion assembly is located in the cutter head (1) and is used for extruding the two extrusion grooves (9).

2. The cutting knife for a detachable stapler according to claim 1, characterized in that, The extrusion assembly includes: A second chute (11), the second chute (11) is opened in the cutter head (1) and is communicated with the two first chutes (7), an extrusion rod (12) is slidably connected in the second chute (11), and both ends of the extrusion rod (12) respectively extend into the two extrusion grooves (9), a threaded rod (13) is threadedly connected in the extrusion rod (12), and the threaded rod (13) is located in the second chute (11) and is rotatably connected with the second chute (11); A movable slot (14), the movable slot (14) is opened in the cutter head (1), a first sprocket (15) and a second sprocket (16) are rotatably connected in the movable slot (14), one end of the first sprocket (15) penetrates through the inner wall of the movable slot (14) and extends into the second chute (11) to be fixedly connected with one end of the threaded rod (13), a chain (17) is engaged between the first sprocket (15) and the second sprocket (16), a rotating block (18) is fixedly connected to the second sprocket (16), and one end of the rotating block (18) penetrates through the inner wall of the movable slot (14) and extends to the outside to be rotatably connected with the cutter head (1); A fixing assembly, the fixing assembly is located in the cutter head (1) and is used for fixing the rotating block (18).

3. A cutting knife for a detachable stapler according to claim 2, characterized in that, Both ends of the extrusion rod (12) are respectively inserted and matched with the two extrusion grooves (9).

4. A cutting knife for a detachable stapler according to claim 2, characterized in that, One end of the first sprocket (15) is rotatably connected with the second chute (11).

5. The cutting blade for a detachable stapler according to claim 2, wherein, The extrusion rod (12) is in an "n" shape, and both ends of the extrusion rod (12) are inclined.

6. A cutting knife for a detachable stapler according to claim 2, characterized in that, The fixing assembly includes: A third sliding groove (19) is provided in the cutter head (1) and communicates with the outside. A second insertion block (20) is slidably connected in the third sliding groove (19), and one end of the second insertion block (20) penetrates through the rotating block (18) and extends into the rotating block (18) for plugging and matching with the rotating block (18). A second spring (21) fixed to the inner wall of the third sliding groove (19) is fixedly connected to the second insertion block (20). A pressing block (22) is fixedly connected to the second insertion block (20), and one end of the pressing block (22) penetrates through the inner wall of the third sliding groove (19) and extends to the outside for sliding connection with the cutter head (1).

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