Integral pull rod for tissue clip closure device and method of manufacture

Abstract

A method for manufacturing an integral pull rod of a tissue clamping device and an integral pull rod manufactured using this method are disclosed. In this method, a retaining section (220) and a separating section (230) are cut from a tubular or sheet-like substrate using a laser. A connecting portion for connecting a clamping element (100) is cut at one end of the retaining section (220). The entire retaining section (220) and separating section (230) are integrally formed, and both break at a first tear (240). The entire structure is simple to process, has fewer parts, and requires no secondary assembly. Moreover, the retaining section (220) and separating section (230) can form a cylindrical structure, and are connected only by one or more first tears (240) on the cylindrical wall, making them easier to break.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to a method for manufacturing a pull rod in an insertable tissue clamping device. Background Technology

[0002] An insertable tissue clip is an insertable medical device used to clamp tissues in the human or animal body to achieve hemostasis or closure. It includes hemostatic clips, tissue clips, etc.

[0003] For example, in minimally invasive treatment of gastrointestinal diseases, tissue clips are often inserted through the instrument channel of an endoscope to achieve therapeutic goals. Hemostatic clips (or tissue clips) are widely used to stop bleeding or close wounds at the site of gastrointestinal bleeding or trauma.

[0004] In typical tissue clamping devices, the internal release structure consists of a pull rod head, a central shaft, and a release hook. The hook penetrates the central shaft and has at least two semi-circular metal pieces forming a complete circular hole, or a metal piece with a C-shaped opening at the top. Under tension, it can open outwards, and when the opening size exceeds the diameter of the central shaft, it achieves forced separation from the central shaft. In other integrated release structures, although the pull rod is made by reducing material from a single metal strip at a predetermined position, this structure is usually made using traditional machining processes, which are complex to manufacture. Moreover, the pull rod is thick, has poor handling, and requires extremely high force to break. Invention Overview

[0006] Technical issues

[0007] This invention mainly provides a method for manufacturing an integrated pull rod of a tissue clamping device, and an integrated pull rod manufactured using this method, which can reduce the number of parts and assembly steps.

[0008] Solution to the problem

[0009] Technical solutions

[0010] To achieve the above objectives, one embodiment of this application provides a method for manufacturing an integrated pull rod of a tissue clamping device, comprising the following steps:

[0011] Provide tubular substrates;

[0012] A laser is used to cut a retaining segment and a separating segment on the substrate, and the retaining segment and the separating segment are connected together by a first tear.

[0013] A connecting portion for connecting the clamping component is cut out at the end of the retaining section opposite to the separating section using a laser.

[0014] To achieve the above objectives, one embodiment of this application provides a method for manufacturing an integral tie rod, comprising the following steps:

[0015] Provide sheet-like substrates;

[0016] A laser is used to cut a retaining segment and a separating segment on the substrate, and the retaining segment and the separating segment are connected together by a first tear.

[0017] A connecting portion for connecting the clamping component is cut out at the end of the retaining section opposite to the separating section using a laser.

[0018] The substrate is bent and fixed into a tubular shape in a first direction.

[0019] In one embodiment, the step further includes:

[0020] A laser is used to cut recessed areas on both sides of the first tear, which are recessed toward the side of the retained section, with the first tear located within the recessed areas.

[0021] In one embodiment, the step further includes:

[0022] A laser is used to cut out spring clips for locking the clamping parts on the reserved section;

[0023] The spring clip is deformed to protrude outward from the reserved section.

[0024] In one embodiment, the step further includes:

[0025] A limiting groove is cut into the separation section using a laser, and the limiting groove extends along a first direction of the separation section.

[0026] In one embodiment, there are at least two limiting grooves, which are distributed along the second direction of the separating segment.

[0027] In one embodiment, the step further includes:

[0028] A slot is cut into the separation section using a laser. The slot has an opening at one end facing the retention section, and the end face of the retention section is located at the opening.

[0029] In one embodiment, the connecting portion includes two legs with mounting holes for connecting to a connecting rod.

[0030] In one embodiment, the connecting portion includes two connecting rods, which are integrally cut by laser on the retained section, and the connecting rods are used to connect with the clamping member.

[0031] To achieve the above objectives, one embodiment of this application provides an integrated pull rod for a tissue clamping device, characterized in that it is manufactured using the manufacturing method described in any of the above claims.

[0032] Beneficial effects of the invention

[0033] Beneficial effects

[0034] According to the manufacturing method of the integrated pull rod in the above embodiment, a retaining section and a separating section are cut out on a tubular or sheet-like substrate using a laser. A connecting portion for connecting a clamping component is cut at one end of the retaining section. The entire retaining section and separating section are integrally formed structures, and both break at the first tear. The entire structure is simple to process, has fewer parts, and requires no secondary assembly. Moreover, the retaining section and separating section can form a cylindrical structure, and they are connected only by one or more first tear portions on the cylindrical wall, making them easier to break.

[0035] Brief description of the accompanying drawings Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the pull rod in one embodiment of this application;

[0037] Figure 2 for Figure 1 The cross-sectional view shown is after the pull rod is connected to the clamping component.

[0038] Figure 3 for Figure 1 A schematic diagram showing the breakage of the tie rod;

[0039] Figure 4 This is a schematic diagram of the tie rod in another embodiment of this application, in which the connecting rod is in the open state;

[0040] Figure 5 for Figure 4 A schematic diagram showing the connecting rod in a closed state in the structure shown;

[0041] Figure 6 This is a schematic diagram of the structure of an insertable tissue clamping device in one embodiment of this application, wherein the transmission components are drawn in an abbreviated manner;

[0042] Figure 7 This is a cross-sectional view of the insertable tissue clamping device in the open state (the moving rod moves within the first stroke) in one embodiment of this application;

[0043] Figure 8 for Figure 7 A schematic diagram of the structure of the clamping component after partial cross-section in the state shown;

[0044] Figure 9 This is a cross-sectional view of the insertable tissue clamping device in a clamping state (the moving rod moves within the second stroke) in one embodiment of this application;

[0045] Figure 10This is a cross-sectional view of an embodiment of the present application in which the insertable tissue clamping device is in a clamping state and the clamping arm is locked in the locking structure (the moving rod moves within the third stroke);

[0046] Figure 11 This is a cross-sectional view of an embodiment of the present application in which the insertable tissue clamping device is in a clamping state, and the retaining section and the separating section on the moving rod break off from the second tear (the moving rod moves within the third stroke);

[0047] Figure 12 This is a cross-sectional view of an embodiment of the present application where the insertable tissue clamping device is in a clamping state, and the clamping member and the separation base break off from the first tear (the moving rod moves within the third stroke).

[0048] Figure 13 This is one embodiment of the application. Figure 4 and 5 A cross-sectional view of the tissue clamping device of the pull rod shown in the open state.

[0049] Figure 14 for Figure 13 The structure shown is a cross-sectional view when it is in a clamped state.

[0050] Invention Embodiments

[0051] Embodiments of the present invention

[0052] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0053] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0054] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0055] This embodiment provides several methods for manufacturing an integrated pull rod in an insertable tissue clamping device (hereinafter referred to as a clamping device for ease of description). This clamping device is used to clamp tissues (collectively referred to as target objects) within a human or animal body to achieve hemostasis or closure; it may include, but is not limited to, hemostatic clips, tissue clips, etc.

[0056] Please refer to Figure 1-5 In one embodiment, a one-piece tie rod 200 is manufactured using a cylindrical substrate as the processing base. This one-piece tie rod 200 is not limited to... Figure 1-5 The structure shown.

[0057] The manufacturing method includes the following steps:

[0058] S11, Provide a cylindrical substrate.

[0059] In this step, the pipe can be a metal pipe with a thickness of 0.1-0.2 mm. Of course, other pipes of other thicknesses and materials can also be used.

[0060] S12. Using a laser, a retaining segment 220 and a separating segment 230 are cut on the substrate, and the retaining segment 220 and the separating segment 230 are connected as one unit through a first tear portion 240.

[0061] The first tear 240 can be at least one and is disposed along a second direction of the tubing. When the tubing is used as the substrate, the first direction is the axial direction of the substrate. The second direction is the circumferential direction of the substrate.

[0062] S13. Using a laser, a connecting part for connecting the clamping member 100 is cut at one end of the retention section 220 away from the separation section 230.

[0063] In this step, the connecting part can either directly dock with the clamping member 100 or be connected to other clamping member connecting structures 600 to dock with the clamping member 100.

[0064] The steps shown in this embodiment can be performed in any feasible order, and are not limited to the order described above. In particular, during laser cutting, the appropriate parts can be flexibly selected for cutting as needed, and are not limited to the cutting order described above.

[0065] In another embodiment, a method for manufacturing the one-piece pull rod 200 using sheet material is also provided. The one-piece pull rod 200 is not limited to... Figure 1-5 The structure shown. The manufacturing method includes the following steps:

[0066] S21. Provide a sheet-like substrate.

[0067] In this step, the tubing can be a metal sheet of 0.1-0.2 mm. Of course, other sheets of different thicknesses and materials can also be used.

[0068] S22. Using a laser, a retaining segment 220 and a separating segment 230 are cut on the substrate, and the retaining segment 220 and the separating segment 230 are connected as one unit through a first tear portion 240.

[0069] The first tear 240 can be at least one and is disposed along the second direction of the pipe.

[0070] S23. Using a laser, a connecting part for connecting the clamping member 100 is cut at the end of the retaining section 220 away from the separating section 230.

[0071] In this step, the connecting part can either directly dock with the clamping member 100 or be connected to other clamping member connecting structures 600 to dock with the clamping member 100.

[0072] S24. Bend the substrate around the first direction and fix it into a cylindrical shape.

[0073] When the sheet-like substrate is made into a cylindrical structure, a result such as Figure 1-5 The tie rod 200 is shown. The fixing can be welding, bonding, or mechanical connection (such as screwing or snap-fit).

[0074] When a sheet is used as the substrate, the first direction is the axial direction after the cylindrical structure is formed. The second direction is the circumferential direction after the cylindrical structure is formed.

[0075] Similarly, the steps shown in this embodiment can be performed in any feasible order, and are not limited to the order described above. In particular, during laser cutting, the appropriate parts can be flexibly selected for cutting as needed, and are not limited to the cutting order described above.

[0076] Furthermore, in the two manufacturing methods mentioned above, please refer to... Figure 1-5 In one embodiment, the method may further include the following steps:

[0077] Using a laser, recessed regions 241 are cut on both sides of the first tear 240, recessed towards the side of the retained section 220, with the first tear 240 located within the recessed regions 241.

[0078] In the two manufacturing methods mentioned above, please refer to Figure 1-5 It may also include the following steps:

[0079] A laser is used to cut out a spring piece 210 for a locking and clamping structure on the retained section 220;

[0080] The spring piece 210 is deformed to protrude outwards from the retained section 220.

[0081] In the two manufacturing methods mentioned above, please refer to Figure 1-5 It may also include the following steps:

[0082] A limiting groove 250 is cut out on the separation section 230 using a laser, and the limiting groove 250 extends along the first direction of the separation section 230.

[0083] In the two manufacturing methods mentioned above, please refer to Figure 1-5 There are at least two limiting grooves 250, which are distributed along the second direction of the separation section 230.

[0084] In the two manufacturing methods mentioned above, please refer to Figure 1-5 It may also include the following steps:

[0085] A slot 260 is cut in the separation section 230 using a laser. The end of the slot 260 facing the retention section 220 has an opening, and the end face of the retention section 220 is located at the opening.

[0086] Please refer to Figure 1 and 2 In one embodiment, the connecting part includes two legs 270 with mounting holes, which are used to connect to the connecting rod 610.

[0087] Please refer to Figure 1-5 In one embodiment, the connecting part includes two connecting rods 610, which are integrally cut by laser on the retaining section 220 and are used to connect with the clamping member 100.

[0088] On the other hand, this embodiment also provides a clamping device, wherein the integrated clamping member in the clamping device can be manufactured in the manner shown in the above embodiments.

[0089] Please refer to Figure 1-14 The clamping device includes a clamping element 100, a pull rod 200, a transmission assembly 300, and a control handle 400.

[0090] The pull rod 200 is used to control the opening and clamping states of the clamping member 100. The pull rod 200 is connected to the clamping arm 110, and the movement of the pull rod 200 can control the movement of the clamping arm 110 in the opening direction and the clamping direction. The transmission assembly 300 serves to support the clamping member 100 and transmit motion and force to the pull rod 200.

[0091] Please refer to Figure 1-5The pull rod 200 is a one-piece molded structure, which has a retaining section 220 and a separating section 230. The retaining section 220 and the separating section 230 are connected by a first tear portion 240.

[0092] Please refer to Figure 2 In one embodiment, the clamping member connection structure 600 includes at least two connecting rods 610, as shown in the figure. One end of each connecting rod 610 is connected together to the distal end of the moving member 200 and can rotate about an axis 620. The other ends are connected to the horizontal axis on the clamping head 1111 and can also rotate about the horizontal axis. Each connecting rod 610 may be coaxial with the rotation center of the moving member 200 or may not be coaxial.

[0093] Please refer to Figure 2 The linkage 610 has a Y-shaped structure, designed to effectively transmit the thrust and pull forces from the up-and-down movement of the moving part 200 to the clamping head 1111, thereby controlling the opening and closing of the clamping head 1111. For example, in... Figure 1 In the illustrated embodiment, when the moving member 200 moves upward (i.e., toward the distal end of the clamping member 100), the clamping member 100 can be controlled to open, switching to the open state. When the moving member 200 moves downward (i.e., toward the proximal end of the clamping member 100), the clamping members 100 can be controlled to move closer to each other, switching to the clamping state.

[0094] Please refer to Figure 4 , 5 as well as Figure 13 and 14 In another type of insert-type clamping device, the moving part 200 can be integrally formed with the clamping part connection structure 600.

[0095] The moving part 200 has a moving part body 201 and at least two connecting rods 610. The connecting rods 610 and the moving part body 201 are integrally formed. The integrally formed structure (including other integrally formed structures described below) is made by laser cutting, which can achieve processing with extremely small gaps, which is conducive to the miniaturization of the overall structure and improves the structural compactness.

[0096] The connecting rod 610 is connected to the clamping member 100. The connecting rods 610 are staggered, with each connecting rod 610 corresponding to a clamping arm 110. Specifically, a connecting rod 610 can be connected to the clamping arm 110 on the opposite side. The connection points between each connecting rod 610 and the moving part body 201 are distributed around the central axis of the moving part body 201. Typically, these connection points can be evenly distributed around the central axis of the moving part body 201, but in other embodiments, they can be arranged in a non-uniform distribution, provided that the opening and closing control of the clamping arms 110 can be achieved.

[0097] Please refer to Figure 4 and 5In one embodiment, the moving part body 201 is a cylindrical structure. The end of the connecting rod 610 connected to the cylindrical structure is an oblique section 611 formed by obliquely cutting the cylindrical wall of the cylindrical structure. Because the clamping arm 110 will be accompanied by a certain degree of torsional deformation during the opening and closing process, the oblique section 611 allows the connecting rod 610 to better adapt to the torsional deformation of the clamping arm 110, making the entire opening and closing process of the clamping arm 110 smoother and more stable, and preventing jamming.

[0098] Please refer to Figure 4 and 5 In one embodiment, the connection point of the connecting rod 610 to the cylindrical structure (such as the inclined section 611) is located within the recessed area of ​​the cylindrical structure. This causes the deformation area of ​​the connecting rod 610 to extend into the cylindrical structure of the moving part body 201, reducing the length of the connecting rod 610 protruding from the moving part body 201 and shortening the axial length of the entire device.

[0099] As an example, please refer to Figure 4 and 5 There are two clamping arms 110 and two connecting rods 610, with each connecting rod 610 corresponding to and connected to one of the clamping arms 110. The two connecting rods 610 are arranged opposite to each other on the cylinder wall of the moving part body 201.

[0100] Further, please refer to Figure 7-14 The clamping member 100 includes a clamping arm 110 and a separating base 120. The clamping arm 110 and the separating base 120 form an integral structure and are connected by a second tear 130. The second tear 130 allows the operator to separate the clamping arm 110 and the separating base 120 by external force.

[0101] The clamping arm 110 includes at least two clamping arms 110. The clamping arms 110 are connected as a single unit. Each set of clamping arms 110 includes a clamping head 1111 and a flexible portion 1112. The clamping arms 110 are arranged in a claw-like structure to clamp a target object. This claw-like structure is a structure capable of firmly grasping the target object, for example in... Figure 1-4 In the case where there are two sets of clamping arms 110, the two clamping arms 110 are arranged opposite each other, and when they are as follows... Figure 1 When the object is closed (in a clamping state), it can be grasped.

[0102] Please refer to Figure 6The transmission assembly 300 includes a sleeve assembly and a transmission component (such as a control line or wire rope) passing through the sleeve assembly. The transmission component is connected to the pull rod 200. The separation base 120 of the clamping member 100 is rotatably connected to the sleeve assembly, for example, by means of a rotating seat, so that the clamping member 100 can rotate as a whole relative to the sleeve assembly. The sleeve assembly is connected to a control handle 400, which forms a linkage structure with the transmission component to control the movement of the transmission component, the pull rod 200, and the clamping member 100. For example, the operator can use the control handle 400 to rotate the clamping member 100 relative to the sleeve assembly, and can also use the control handle 400 to control the opening and closing of the clamping member 100.

[0103] The lever 200 has a first stroke, a second stroke, and a third stroke. The first stroke, the second stroke, and the third stroke are three parts of the entire movement of the lever 200. The three strokes can be in the same direction, or at least two of the strokes can be in different directions.

[0104] As an example, please refer to Figure 7 , 8 At point 13, the lever 200 is in its first stroke. When the lever 200 moves away from the control handle 400 along its axis and moves closer to the clamping member 100 (moving to the right as shown in the figure), the lever 200 can drive the clamping member 100 to open outward, thereby moving the clamping member 100 to the open state.

[0105] Please refer to Figure 9 and 14 At this time, the lever 200 is in the second stroke. When the lever 200 moves towards the control handle 400 along its axis and moves away from the clamping member 100 (moving to the left as shown in the figure), the lever 200 can drive the clamping member 100 to move inward towards each other, thereby moving the clamping member 100 to the clamping state.

[0106] Please refer to Figure 10-12 At this point, the lever 200 is in its third stroke. As the lever 200 moves axially towards the control handle 400 and away from the clamping member 100 (moving to the left as shown in the diagram), this third stroke is in the same direction as the second stroke and is tightly connected. That is, when the clamping member 100 moves to the clamping state, the lever 200 switches from the second stroke to the third stroke. This third stroke can be further divided into multiple sub-strokes, including a locking stroke, an inner release stroke, and an outer release stroke.

[0107] Please refer to Figure 10 When the lever 200 switches to the third stroke and moves to the position shown in the figure, the clamping member 100 is locked, and the lever 200 cannot move in the opposite direction to open the clamping member 100. During this process, the movement stroke of the lever 200 is the locking stroke.

[0108] Please refer to Figure 11 After completing its locking stroke, the lever 200 enters its inner release stroke. When the lever 200 moves to the position shown in the diagram, the clamping member 100 separates from the lever 200, and the lever 200 can no longer move the clamping member 100, thus losing control of the clamping member 100, which remains in the locked state. The movement of the lever 200 during this process is the inner release stroke.

[0109] Please refer to Figure 12 After completing the inner release stroke, the pull rod 200 enters the outer release stroke. When the pull rod 200 moves to the position shown in the figure, the clamping member 100 and the separation base 120 break off from the second tear 130. At this point, the clamping member 100 remains on the target object it is holding. The separation base 120, the pull rod 200, and the transmission assembly 300 can be pulled out from the target object. The movement stroke of the pull rod 200 during this process is the outer release stroke.

[0110] Specifically, the separation base 120 is provided with a follower shaft 125, which extends transversely through the separation base 120. The follower shaft 125 is used to drive the separation base 120 and the moving rod 200 together towards the control handle 400 when the moving rod 200 moves along its third stroke. The moving rod 200 may also have a limiting groove 250, and the follower shaft 125 is located at the bottom of the limiting groove 250. As the moving rod 200 moves towards the control handle 400, when the moving rod 200 enters the outer disengagement stroke, the top of the limiting groove 250 moves to the follower shaft 125, thereby starting to drive the follower shaft 125 and the separation base 120 towards the control handle 400, thus causing the separation base 120 to separate from the clamping arm 110.

[0111] Furthermore, the bending deformation of the bendable portion 1112 is achieved through its integral structure. Please refer to [reference needed]. Figure 7-10 In some embodiments, the end of the clamping arm 110 closest to the separating base 120 is the proximal end, and the end away from the separating base 120 is the distal end. The direction from the proximal end to the distal end of the clamping arm 110 is the first direction of the clamping arm 110. To achieve this integrated deformable structure, the deformable structure includes a plurality of first contraction slits 1113, which are arranged sequentially along the first direction.

[0112] In one embodiment, such as Figure 9 and 10 As shown, the clamping arm 110 remains in the clamping state in the initial state, the first contraction slits 1113 remain in the initial state, and the flexible portion 1112 does not deform. Figure 7 and 8As shown, when the clamping arm 110 needs to be opened, the flexible part 1112 deforms outward, and the first contraction slit 1113 contracts and deforms, thereby causing the outer side of the flexible part 1112 (the side of the clamping arm 110 that is opposite to each other) to contract, so that the entire clamping head 1111 opens.

[0113] Please refer to Figure 9 and 10 In one embodiment, the first contraction slit 1113 extends circumferentially around the flexible portion 1112. The first contraction slits 1113 are arranged in parallel. Of course, the first contraction slits 1113 can be arranged in other shapes besides being parallel to each other. By arranging the first contraction slits 1113 uniformly in parallel circumferentially along the flexible portion 1112, the bending deformation direction of each first contraction slit 1113 can be unified, making the bending deformation of the clamping arm 110 smoother and more stable.

[0114] Further, please refer to Figure 7-10 In one embodiment, the clamping arm 110 includes a connecting portion 112. The connecting portion 112, the flexible portion 1112, and the clamping head 1111 are sequentially connected as a single unit. A second tearing portion 130 is connected between the connecting portion 112 and the separation base 120.

[0115] Please refer to Figure 7-10 The connecting part 112 has the aforementioned slot 1121, which is used to lock the clamping arm 110 in the clamping state. The slot 1121 can at least prevent the clamping arm 110 from moving in the opening direction, so as to ensure that the clamping arm 110 is always in the clamping state.

[0116] The clamping arm 110 has a cylindrical structure. One end of the pull rod 200 extends into the cylindrical structure and is connected to the clamping arm 110. A spring piece 210 is provided on the pull rod 200, and the spring piece 210 is inclined towards the distal end of the clamping arm 110 along its protruding direction. This inclined spring piece 210 can move along the inner wall of the clamping arm 110 towards the control handle 400 when the pull rod 200 moves along its third stroke, preventing the spring piece 210 from getting stuck in other parts of the clamping arm 110. When the spring piece 210 moves to the slot position, it can be engaged in the slot under elastic force, preventing the pull rod 200 and the clamping arm 110 from retracting and opening the clamping state.

[0117] To assist the pull rod 200 in disengaging from the inside, please refer to... Figure 10 and 11 In one embodiment, the separation base 120 has a stop 121 located on the movement path of the retaining section 220. When the pull rod 200 is in the inner disengagement stroke, the stop 121 prevents the retaining section 220 from continuing to move with the pull rod 200 and the separation section 230, thereby helping the retaining section 220 and the separation section 230 to separate.

[0118] exist Figure 10 In the embodiment shown, the pull rod 200 has a slot 260 arranged along its axial direction, and a stop piece 121 protrudes from the pull rod 200 and extends into the slot 260 so as to abut against the groove wall of the slot 260 when the pull rod 200 moves along its inward disengagement stroke.

[0119] Further, please refer to Figure 12 In the external detachment structure, there is at least one second tear 130, and the separation base 120 and the clamping arm 110 are connected only through the second tear 130 to facilitate the separation of the separation base 120 from the clamping arm 110 during the external detachment formation. In order to distribute the force evenly, in one embodiment, the second tear 130 is evenly distributed around the clamping arm 110 and the separation base 120 in the circumference.

[0120] Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the basic principles of the invention. Therefore, the scope of the invention should be determined according to the following claims.

Claims

1. A method for manufacturing an integrated pull rod of a tissue clamping device, the tissue clamping device being used to clamp tissues within a human or animal body, characterized in that... Including the following steps: Provide tubular substrates; A laser is used to cut a retention section and a separation section into the substrate. Both the retention section and the separation section are cylindrical structures and are connected to each other only by multiple first tear sections on the cylindrical wall. A connecting portion for connecting the clamping component is cut out at the end of the retaining section opposite to the separating section using a laser.

2. A method for manufacturing an integrated pull rod of a tissue clamping device, the tissue clamping device being used to clamp tissues within a human or animal body, characterized in that... Including the following steps: Provide sheet-like substrates; A laser is used to cut a retaining segment and a separating segment on the substrate, and the retaining segment and the separating segment are connected together by a first tear. A connecting portion for connecting the clamping component is cut out at the end of the retaining section opposite to the separating section using a laser. The substrate is bent and fixed into a tubular shape around a first direction; and both the retaining section and the separating section form a cylindrical structure, with the retaining section and the separating section connected only by multiple first tear portions on the cylindrical wall.

3. The manufacturing method as described in claim 1 or 2, characterized in that, It also includes the following steps: A laser is used to cut recessed areas on both sides of the first tear, which are recessed toward the side of the retained section, with the first tear located within the recessed areas.

4. The manufacturing method as described in claim 1 or 2, characterized in that, It also includes the following steps: A laser is used to cut out spring clips for locking the clamping parts on the reserved section; The spring clip is deformed to protrude outward from the reserved section.

5. The manufacturing method as described in claim 1 or 2, characterized in that, It also includes the following steps: A limiting groove is cut into the separation section using a laser, and the limiting groove extends along a first direction of the separation section.

6. The manufacturing method as described in claim 5, characterized in that, There are at least two limiting grooves, which are distributed along the second direction of the separation section.

7. The manufacturing method as described in claim 1 or 2, characterized in that, It also includes the following steps: A slot is cut into the separation section using a laser. The slot has an opening at one end facing the retention section, and the end face of the retention section is located at the opening.

8. The manufacturing method as described in claim 1 or 2, characterized in that, The connecting part includes two legs with mounting holes for connecting to the connecting rod.

9. The manufacturing method as described in claim 1 or 2, characterized in that, The connecting part includes two connecting rods, which are integrally cut by laser on the retained section, and are used to connect with the clamping member.

10. An integrated pull rod for a tissue clamping device, characterized in that, It is manufactured using the manufacturing method described in any one of claims 1-9.

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