Structure and stapler for preventing deformation of belt-driven components

Abstract

This invention relates to the field of stapler technology, specifically disclosing a structure and stapler for preventing deformation of the drive component of the stapler's band mechanism. In the mechanism provided by this invention, the band component is connected to the cutting blade via a first pull rope. The first pull rope passes around a pulley assembly, causing the cutting blade to fire distally as the band component moves proximally, thereby achieving tissue cutting. The band component is subjected to a force opposite to the firing direction, effectively preventing deformation of the band component in the firing direction of the stapler, improving the firing accuracy of the stapler, ensuring the stapler fires precisely, and guaranteeing the normal progress of the surgery.

Description

Technical Field

[0001] This invention relates to the field of stapler technology, and in particular to a structure and stapler for preventing deformation of the drive component of the stapler using a band mechanism. Background Technology

[0002] Medical staplers are medical instruments frequently used in surgical procedures on the physiological tissues of the digestive tract. In general surgery, staplers are often used to cut and close tissues. The working principle of a stapler involves placing the tissue between the staple cartridge and the anvil. By adjusting the distance between the cartridge and the anvil, the tissue is compressed appropriately. When the distance between the cartridge and the anvil reaches a safe range for suturing, the stapler is fired, compressing the U-shaped staples into a B-shape to suture the tissue. Small blood vessels can pass through the compressed B-shaped staples to ensure blood supply to the anastomosis and distal tissues. Then, a cutting blade cuts the tissue. Normally, the stapler is fired by a firing mechanism that pushes the pusher block and the cutter. The firing mechanism includes a firing rod. In order to adapt to the swing of the stapler head and the drive of the pusher block, the firing rod is made of multiple layers of thin steel sheets. It must meet both a certain degree of flexibility and a certain degree of rigidity. Therefore, during the firing process, the cutting force of the cutter and the resistance of the pusher block are different when encountering tissues of different thicknesses. This results in different deformations of the firing rod, which in turn causes the firing mechanism to fail to fire properly, affecting the normal progress of the operation. Summary of the Invention

[0003] The purpose of this invention is to provide a structure and a stapler that prevents deformation of the drive component of the band mechanism in a stapler, thereby solving the problem of incomplete firing of the firing mechanism.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A structure for preventing deformation of the drive component of a stapler using a band mechanism includes:

[0006] Strip-shaped components;

[0007] A driving element that drives the strip-shaped component to move proximally;

[0008] A first pull rope, one end of which is connected to the strip-shaped component;

[0009] The pulley assembly has the other end of the first pull rope passing around the pulley assembly and connected to the cutting blade. When the drive unit drives the strip-shaped component to move towards the proximal end, the cutting blade moves towards the distal end.

[0010] Preferably, the first pull rope is provided, and both the first pull rope and the pulley assembly are disposed in the anvil or nail magazine.

[0011] Preferably, there are two first pull ropes, one of which is disposed in the anvil and the other in the nail magazine, and the pulley assembly is disposed in both the anvil and the nail magazine.

[0012] Preferably, one end of the first pull cord is connected to the distal end of the strip-shaped component, and the other end of the first pull cord is connected to the distal end of the cutting blade.

[0013] Preferably, the pulley assembly includes a first fixed pulley, a second fixed pulley, and a third fixed pulley. The first fixed pulley and the second fixed pulley are spaced apart along the length direction of the strip member, and the third fixed pulley is spaced apart from the second fixed pulley along the width direction of the strip member.

[0014] The first pull rope contacts the lower part of the third fixed pulley and the upper part of the second fixed pulley, and the first pull rope passes over the first fixed pulley from the upper part of the first fixed pulley and connects to the distal end of the cutting blade.

[0015] Preferably, the cutting blade is connected to a reset member that enables the cutting blade to move and reset towards its proximal end.

[0016] Preferably, the reset element includes:

[0017] A second pull rope, one end of which is connected to the cutting blade;

[0018] A reset drive unit is connected to the other end of the second pull rope, and the reset drive unit drives the second pull rope to pull the cutting blade to move towards the proximal end for reset.

[0019] Preferably, the first pull rope is a steel wire rope.

[0020] Preferably, one end of the first pull rope is connected to an elastic element, which is connected to the strip-shaped component or the cutting blade.

[0021] A stapler, comprising the structure described in any of the preceding claims for preventing deformation of the stapler's belt mechanism drive component.

[0022] The beneficial effects of this invention are as follows: The strip-shaped component and the cutting blade are connected by a first pull rope. The first pull rope passes around the pulley assembly so that when the strip-shaped component moves towards the proximal end, the cutting blade fires towards the distal end, thereby achieving tissue cutting. The strip-shaped component is subjected to a force opposite to the firing direction, which effectively avoids the deformation of the strip-shaped component in the firing direction of the stapler, improves the firing accuracy of the stapler, ensures that the stapler fires in place, and ensures that the surgery can proceed normally. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of the belt mechanism driving component for preventing deformation of the stapler provided in an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Strip-shaped component; 2. First pull rope; 31. First fixed pulley; 32. Second fixed pulley; 33. Third fixed pulley; 41. Second pull rope; 100. Cutting knife; 200. Anvil; 300. Nail cartridge. Detailed Implementation

[0026] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In existing technologies, to accommodate the swing of the stapler head and the drive of the pusher block, the firing rod is made of multiple layers of thin steel sheets. It needs to satisfy both a certain degree of flexibility and a certain degree of rigidity. Therefore, during the firing process, the cutting force of the cutting blade and the resistance experienced by the pusher block vary depending on the thickness of the tissue encountered, resulting in different deformations of the firing rod. This leads to incomplete firing by the firing mechanism, affecting the normal progress of the surgery. The following is a structure to prevent deformation of the steel strip of the stapler to solve the above problems.

[0030] Specifically, such as Figure 1 As shown, in this embodiment, the structure for preventing deformation of the stapler's drive component using a band-like mechanism includes a band-like component 1, a drive member, a first pull rope 2, and a pulley assembly. The drive member drives the band-like component 1 to move proximally. One end of the first pull rope 2 is connected to the band-like component 1, and the other end of the first pull rope 2 passes around the pulley assembly and connects to the cutting blade 100. When the drive member drives the band-like component 1 to move proximally, the cutting blade 100 moves distally. The band-like component 1 and the cutting blade 100 are connected by the first pull rope 2. The first pull rope 2 passes around the pulley assembly so that when the band-like component 1 moves proximally, the cutting blade 100 fires distally, thereby achieving tissue cutting. The band-like component 1 is subjected to a force opposite to the firing direction, effectively preventing deformation of the band-like component 1 in the firing direction of the stapler, improving the firing accuracy of the stapler, ensuring that the stapler fires in place, and guaranteeing the normal progress of the surgery.

[0031] In this embodiment, the strip component 1 has a certain degree of flexibility and rigidity so that it can swing with the swing head of the stapler and push the cutting blade 100 to fire during the firing process. Therefore, the strip component 1 can be a strip component 1 made of steel strip or other metal material with a certain degree of flexibility and rigidity, or it can be a strip component 1 made of plastic material with a certain degree of rigidity and flexibility.

[0032] In this embodiment, in order to improve the balance of the cutting blade 100 during the firing process, two first pull ropes 2 are provided. One first pull rope 2 is set in the anvil 200 and the other first pull rope 2 is set in the nail magazine 300. Both the anvil 200 and the nail magazine 300 are provided with pulley assemblies. Each pulley assembly is provided with one first pull rope 2. The two first pull ropes 2 make the upper and lower parts of the cutting blade 100 bear force equally.

[0033] In other embodiments, in order to simplify the structure of the stapler, a first pull rope 2 is provided, provided that the cutting blade 100 can be fired stably. The first pull rope 2 and the pulley assembly are both located in the anvil 200 or the staple cartridge 300.

[0034] In this embodiment, one end of the first pull rope 2 is connected to the far end of the strip component 1, and the other end of the first pull rope 2 is connected to the far end of the cutting blade 100, so as to drive the cutting blade 100 to fire, thereby shortening the length of the first pull rope 2 and improving the stability of the cutting blade 100 firing.

[0035] In other embodiments, one end of the first pull rope 2 may also be connected to the proximal end of the strip member 1, and the other end of the first pull rope 2 may be connected to the distal end of the cutting blade 100.

[0036] In this embodiment, one end of the first pull rope 2 is connected to the middle position of the end of the strip-shaped component 1, and the other end of the first pull rope 2 is connected to the upper or lower position of the end of the cutting blade 100. Preferably, two first pull ropes 2 are provided, one first pull rope 2 is connected to the upper position of the cutting blade 100, and the other first pull rope 2 is connected to the lower position of the cutting blade 100, so that the cutting blade 100 is subjected to uniform force during firing.

[0037] Furthermore, the pulley assembly includes a first fixed pulley 31, a second fixed pulley 32, and a third fixed pulley 33. The first fixed pulley 31 and the second fixed pulley 32 are spaced apart along the length direction of the strip member 1, and the third fixed pulley 33 is spaced apart from the second fixed pulley 32 along the width direction of the strip member 1. The first pull rope 2 contacts the lower part of the third fixed pulley 33 and the upper part of the second fixed pulley 32, and the first pull rope 2 passes over the upper part of the first fixed pulley 31 and connects to the distal end of the cutting blade 100. As the band-shaped component 1 moves toward the proximal end of the stapler, the end of the first pull rope 2 connected to the band-shaped component 1 moves toward the proximal end along with the band-shaped component 1. Under the guidance of the first fixed pulley 31, the second fixed pulley 32 and the third fixed pulley 33, the first pull rope 2 pulls the cutting blade 100 toward the distal end to fire. The moving direction of the band-shaped component 1 is opposite to the firing direction, which effectively avoids deformation of the band-shaped component 1 in the firing direction of the stapler and improves the firing accuracy of the stapler.

[0038] After the cutter 100 is fired into position, in preparation for the next use of the stapler, the cutter 100 is connected to a reset mechanism that moves the cutter 100 proximally back to its initial position. After the cutter 100 has finished cutting the tissue, the reset mechanism is operated to move the cutter 100 proximally back to its initial position.

[0039] Furthermore, the reset component includes a second pull rope 41 and a reset drive (not shown in the figure). One end of the second pull rope 41 is connected to the cutting blade 100, and the reset drive is connected to the other end of the second pull rope 41. The reset drive drives the second pull rope 41 to pull the cutting blade 100 towards the proximal end for reset. This reset component has a simple structure and is easy to operate; it only needs to be able to drive the second pull rope 41 to apply a pulling force to the cutting blade 100 in the opposite direction of firing. The second pull rope 41 is preferably a steel wire rope.

[0040] Furthermore, the reset drive can be a pull switch mounted on the handle of the stapler. One end of the pull switch is connected to the other end of the second pull rope 41, and the other end of the pull switch is located outside the handle. The handle has a groove that allows the pull switch to move along the moving direction of the cutting blade 100. Pulling the pull switch manually can reset the cutting blade 100. When the cutting blade 100 is fired and advanced, the pull switch can move to the distal end with the cutting blade 100.

[0041] In other embodiments, the reset drive can also be a motor, which is located inside the handle. The motor can drive the winding disc to rotate. When the cutter 100 needs to be reset, the motor drives the winding disc to rotate in one direction to wind up the second pull rope 41. When the cutter 100 is fired forward, the motor drives the winding disc to rotate in another direction to unwind the second pull rope 41.

[0042] The reset drive can also be a gear and rack mechanism inside the anastomosis device. The second pull rope 41 is connected to the rack. The gear and rack mechanism can drive the second pull rope 41 to reset the cutter 100, or make the second pull rope 41 move forward with the cutter 100.

[0043] The reset drive can also have other structures, which will not be elaborated here.

[0044] In this embodiment, the length of the first pull rope 2 is constant. The first pull rope 2 is a steel wire rope, which is not easily broken, improving the stability of the anastomosis device. In other embodiments, the length of the first pull rope 2 can also vary. The first pull rope 2 is preferably a steel wire rope, and an elastic element can be connected to one end of the first pull rope 2. The elastic element is then connected to the strip component 1 or the cutting blade 100. The variable length of the first pull rope 2 allows for fine-tuning of the firing displacement of the cutting blade 100 to ensure that the cutting blade 100 fires in the correct position. Preferably, the elastic element is a spring. Alternatively, a disc can be provided inside the anastomosis device, with part of the first pull rope 2 wound around the disc. When the cutting blade 100 fires and advances, the disc rotates in one direction under the tension of the first pull rope 2, allowing the length of the first pull rope 2 to be adjusted according to the actual firing distance. When the cutting blade 100 resets, the disc rotates in another direction under the reset elasticity of its own structure to wind the first pull rope 2, so that both the strip component 1 and the cutting blade 100 can move to their initial positions.

[0045] This embodiment also provides a stapler, including the structure described above for preventing deformation of the stapler's belt mechanism drive component.

[0046] When using the stapler, the drive unit drives the strip component 1 to move proximally. Under the pull of the first pull rope 2, the cutter 100 is driven to fire and cut distally. After the cutter 100 is fired into position, the second pull rope 41 is pulled to reset the cutter 100, in preparation for the next use of the stapler.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A structure for preventing deformation of the drive component of a stapler using a band-like mechanism, characterized in that, include: Strip component (1); A driving element that drives the strip member (1) to move proximally; A first pull rope (2), one end of which is connected to the strip-shaped component (1); The pulley assembly has the other end of the first pull rope (2) passing around the pulley assembly and connected to the cutter (100). When the drive unit drives the strip member (1) to move towards the proximal end, the cutter (100) moves towards the distal end. One end of the first pull cord (2) is connected to the distal end of the strip member (1), and the other end of the first pull cord (2) is connected to the distal end of the cutting blade (100); the first pull cord (2) passes around the pulley assembly so that when the strip member (1) moves towards the proximal end, the cutting blade (100) fires towards the distal end, thereby cutting the tissue, and the strip member (1) is subjected to a force opposite to the firing direction.

2. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 1, characterized in that, The first pull rope (2) is provided, and both the first pull rope (2) and the pulley assembly are provided in the anvil (200) or the nail magazine (300).

3. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 1, characterized in that, There are two first pull ropes (2), one of which is located in the anvil (200) and the other is located in the nail magazine (300). The pulley assembly is provided in both the anvil (200) and the nail magazine (300).

4. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 1, characterized in that, The pulley assembly includes a first fixed pulley (31), a second fixed pulley (32) and a third fixed pulley (33). The first fixed pulley (31) and the second fixed pulley (32) are spaced apart along the length direction of the strip member (1), and the third fixed pulley (33) is spaced apart from the second fixed pulley (32) along the width direction of the strip member (1). The first pull rope (2) contacts the lower part of the third fixed pulley (33) and the upper part of the second fixed pulley (32) respectively, and the first pull rope (2) passes over the first fixed pulley (31) from the upper part of the first fixed pulley (31) and connects to the far end of the cutting blade (100).

5. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 1, characterized in that, The cutting blade (100) is connected to a reset member that enables the cutting blade (100) to move and reset towards the proximal end.

6. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 5, characterized in that, The reset component includes: A second pull rope (41), one end of which is connected to the cutting blade (100); A reset drive unit is connected to the other end of the second pull rope (41). The reset drive unit drives the second pull rope (41) to pull the cutting blade (100) to move to the proximal end for reset.

7. The structure for preventing deformation of the belt-shaped mechanism driving component of the stapler according to claim 1, characterized in that, The first pull rope (2) is a steel wire rope.

8. The structure for preventing deformation of the belt mechanism drive component of the stapler according to claim 7, characterized in that, One end of the first pull rope (2) is connected to an elastic element, which is connected to the strip member (1) or the cutter (100).

9. A stapler, characterized in that, The structure includes the structure for preventing deformation of the belt mechanism drive component of the stapler as described in any one of claims 1-8.

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