Insertable tissue clip closure device

Abstract

A clamping piece of an insertion type tissue clamping and closing device, the clamping piece comprising at least two clamping arms, each clamping arm comprising a clamping head and a bendable part, the bendable part having a deformation structure capable of bending towards a closing direction of the clamping piece and / or bending towards an opening direction of the clamping piece. In this structure, the sleeve in the prior art structure is omitted, the clamping piece is directly driven by a movement rod, and in combination with the deformation state of the bendable part, the opening and closing of the clamping piece are realized. Under the same opening width requirement, the length of the clamping piece is shorter than the combination of the clamping arm and the sleeve in the prior art. Moreover, in the clamping piece, some parts are manufactured separately, and after being assembled into an integral whole, the manufacturing difficulty is reduced, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to the structure of an insertable tissue clip device for surgical procedures. 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 existing technology, one type of hemostatic clip (or tissue clip) mainly achieves opening and clamping through the cooperation of clamping arms and a sleeve. Specifically, the left and right clamping arms are loosely assembled together by a pin. The clamping arms can retract into the sleeve to achieve closure. The clamping arms can also extend from the sleeve to achieve opening. Because this structure utilizes the axial space of the sleeve to achieve closure of the clamping arms, a portion of the clamping arm must retract into the sleeve. This results in a relatively long overall length of the hemostatic clip remaining in the patient's body after separation, making it more likely to cause injury and discomfort to the patient.

[0005] In another type of hemostatic clip (or tissue clip), the clamping arms are mainly connected by a pivot, and there is a sliding track inside the sleeve along which the pivot can slide. There is also a fixed pivot at the upper end of the sleeve, and the clamping arms have elongated holes through which the fixed pivot passes. Pushing and pulling the sliding pivot moves the two clamping arms up and down. When obstructed by the fixed pivot, the clamping arms are forced to move along the path of the elongated holes, thus opening and closing. This structure improves control precision and makes the clip smaller, but it has more parts, making the structure more complex and increasing the cost. Summary of the Invention

[0006] This application provides an insertable tissue clamping device and its clamping element to demonstrate a novel opening and clamping structure.

[0007] Based on the above objectives, one embodiment of this application provides an insertable tissue clamping device, comprising: A clamping member comprising at least two clamping arms, the clamping arms being separate structures but interconnected, each clamping arm comprising a clamping head and a flexible portion; the clamping head and the flexible portion within the same clamping arm being separate structures but interconnected, or the clamping head and the flexible portion being an integrally formed structure; the clamping arms are used to clamp a target object; the flexible portion has a deformable structure capable of bending in the closing direction of the clamping member and / or bending in the opening direction of the clamping member; A separation base, which is connected to the clamping member; A moving rod, connected to the clamping member, to drive the clamping member to open and close; A transmission assembly, comprising a sleeve assembly and a transmission component passing through the sleeve assembly, the transmission component being connected to the moving rod, and the separation base being rotatably connected to the sleeve assembly so that the clamping member can rotate as a whole relative to the sleeve assembly. The sleeve assembly is connected to the control handle, and the control handle and the transmission component form a linkage structure to control the movement of the moving rod and the clamping component. The moving rod has a first stroke, a second stroke, and a third stroke; in the first stroke, the moving rod drives the clamping heads away from each other to open the clamping heads; in the second stroke, the moving rod drives the clamping heads closer to each other, and the clamping member moves to a clamping state to clamp the target object; in the third stroke, the clamping member remains in the clamping state and separates from the moving rod, and the separation base separates from the clamping member.

[0008] Based on the above objectives, one embodiment of this application provides an insertable tissue clamping device, comprising: A clamping member includes at least two clamping arms, each clamping arm including a clamping head and a flexible portion. The clamping head and the flexible portion in each clamping arm are separate structures, but connected to each other. The flexible portions of different clamping arms are integrally formed. The clamping arms are used to clamp a target object. The flexible portion has a deformable structure that can be bent in the closing direction of the clamping member and / or in the opening direction of the clamping member. A separation base, which is connected to the clamping member; A moving rod, connected to the clamping member, to drive the clamping member to open and close; A transmission assembly, comprising a sleeve assembly and a transmission component passing through the sleeve assembly, the transmission component being connected to the moving rod, and the separation base being rotatably connected to the sleeve assembly so that the clamping member can rotate as a whole relative to the sleeve assembly. The sleeve assembly is connected to the control handle, and the control handle and the transmission component form a linkage structure to control the movement of the moving rod and the clamping component. The moving rod has a first stroke, a second stroke, and a third stroke; in the first stroke, the moving rod drives the clamping heads away from each other to open the clamping heads; in the second stroke, the moving rod drives the clamping heads closer to each other, and the clamping member moves to a clamping state to clamp the target object; in the third stroke, the clamping member remains in the clamping state and separates from the moving rod, and the separation base separates from the clamping member.

[0009] Based on the above objectives, one embodiment of this application provides a clamping member of an insertable tissue clamping device. The clamping member includes at least two clamping arms, which are separate structures connected to each other. Each clamping arm includes a clamping head and a flexible portion. The clamping head and the flexible portion within the same clamping arm are separate structures connected to each other, or the clamping head and the flexible portion are integrally formed. The clamping arms are arranged in a claw-like structure to clamp the target object. The flexible portion has a deformable structure that can be bent in the closing direction of the clamping member and / or in the opening direction of the clamping member.

[0010] Based on the above objectives, one embodiment of this application provides a clamping member of an insertable tissue clamping device. The clamping member includes at least two clamping arms, each clamping arm including a clamping head and a flexible portion. The clamping head and the flexible portion in each clamping arm are separate structures, but connected to each other. The flexible portions of different clamping arms are integrally formed structures. The clamping arms are arranged in a claw-like structure to clamp the target object. The flexible portion has a deformable structure that can be bent in the closing direction of the clamping member and / or in the opening direction of the clamping member.

[0011] As a further improvement to the above embodiments, the deformable structure includes a plurality of first contraction seams, which are arranged sequentially along the longitudinal direction of the clamping member.

[0012] As a further improvement of the above embodiments, the flexible portion has a plurality of second contraction slits extending circumferentially thereon, and the second contraction slits are arranged longitudinally between each other; the two ends of each group of first contraction slits respectively extend into the space between two longitudinally adjacent second contraction slits, and the overlapping area between the first contraction slits and the second contraction slits forms a torsional deformation segment, so that the flexible portion can be bent and torsional deformed.

[0013] As a further improvement of the above embodiments, the first shrinkage seam extends circumferentially around the flexible portion; the flexible portion has a limiting structure, and the limiting structure is at least two sets. In the circumferential direction of the flexible portion, the limiting structure is provided on at least one side of the flexible portion to limit the maximum angle of bending of the flexible portion toward the opening direction of the clamping member.

[0014] As a further improvement of the above embodiments, each of the limiting structures includes a plurality of limiting units arranged longitudinally along the clamping member. Each limiting unit includes a first limiting block and a second limiting block disposed opposite to each other. There is a gap between the first limiting block and the second limiting block disposed longitudinally. The second contraction seam communicates with the gap. During the bending process of the flexible portion in the opening direction, the first limiting block and the second limiting block approach each other and form a fastening structure.

[0015] As a further improvement to the above embodiments, in the same limiting unit, the first limiting block and the second limiting block are formed by the sidewall of the flexible portion located on the side of the first shrinkage seam through the second shrinkage seam. The first limiting block and the second limiting block are connected as one piece at one end near the first shrinkage seam, and the other ends are separated from each other.

[0016] As a further improvement to the above embodiments, the initial state of the clamping member is the clamping state; the second contraction seam has a gap in the longitudinal direction, and the second contraction seam of the limiting structure forms an adaptive floating structure that can deform in the clamping direction, so that when the clamping member clamps the target object, the flexible part can adaptively bend and deform in the closing direction according to the volume of the target object.

[0017] The insertable tissue clamping device according to the above embodiment includes a clamping member comprising at least two clamping arms, each clamping arm comprising a clamping head and a flexible portion, the flexible portion having a deformable structure capable of bending in the closing direction of the clamping member and / or bending in the opening direction of the clamping member. In this structure, the sleeve in the existing structure is omitted, and the clamping member is directly driven by a moving rod, combined with the deformation state of the flexible portion, thereby realizing the opening and closing of the clamping member. Under the same opening requirement, the length of this clamping member is shorter than the combination of clamping arms and sleeves in the prior art. Moreover, in this clamping member, some parts are manufactured separately and then assembled into a whole, which reduces manufacturing difficulty and cost. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an insertable tissue clamping device in one embodiment of this application; Figure 2 This is a schematic diagram of a clamping component consisting of two separate clamping arms in one embodiment of this application; Figure 3 for Figure 2 A schematic diagram of the structure of the clamping member when it is in the open state; Figure 4 This is a schematic diagram of a clamping member consisting of a clamping head and a flexible portion in one embodiment of this application; Figure 5 This is a schematic diagram of an embodiment of the present application in which the flexible part, the connecting part and the detachable base are integrally formed; Figure 6 This is a schematic diagram of the structure of the insertable tissue clamping device in the open state (the moving rod moves within the first stroke) in one embodiment of this application; Figure 7 for Figure 6 A schematic diagram of the structure of the clamping component after partial cross-section in the state shown; Figure 8 This is a schematic diagram of the structure of the insertable tissue clamping device in the clamping state (the moving rod moves within the second stroke) in one embodiment of this application; Figure 9 for Figure 8 A schematic diagram of the structure after a portion of the structure has been partially cut open in the state shown. Figure 10 This is a schematic diagram of the structure of an embodiment of the present application where 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). Figure 11 for Figure 10 A schematic diagram of the structure after a portion of the structure has been partially cut open in the state shown. Figure 12 This is a schematic diagram of the structure of the insertable tissue clamping device in one embodiment of this application when the moving rod is separated from the clamping member (the moving rod moves within the third stroke); Figure 13 for Figure 12 A schematic diagram of the structure after a portion of the structure has been partially cut open in the state shown. Figure 14 This is a schematic diagram of the structure of the insertable tissue clamping device in one embodiment of this application when the clamping member and the separation base are separated (the moving rod moves within the third stroke); Figure 15 for Figure 14 A schematic diagram of the structure after a portion of the structure has been partially cut open in the state shown. Figure 16 This is a schematic diagram of the unfolded shape of the clamping member in one embodiment of this application; Figure 17 for Figure 16 Enlarged schematic diagram of the deformable structure of the bendable portion in the embodiment shown; Figure 18This is an enlarged schematic diagram of the deformable structure of the bendable portion in another embodiment of this application; Figure 19 This is an enlarged schematic diagram of the deformable structure of the bendable portion in another embodiment of this application; Figure 20 This is a schematic diagram of the bendable portion when clamping a thinner tissue in one embodiment of this application; Figure 21 This is a schematic diagram of the bendable portion when clamping a thicker tissue in one embodiment of this application; Figure 22 This is a schematic diagram of the deformable structure of the bendable portion in another embodiment of this application; Figure 23 This is a schematic diagram of the deformable structure of the bendable portion in another embodiment of this application; Figure 24 This is a schematic diagram of the structure in the open self-locking state in one embodiment of this application. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0020] This embodiment provides an insertable tissue clamping device (hereinafter referred to as a clamping device for ease of description), which is used to clamp tissues (collectively referred to as target objects) in human or animal bodies to achieve hemostasis or closure. It may include, but is not limited to, hemostatic clips, tissue clips, etc.

[0021] Please refer to Figure 1-13 The clamping device includes a clamping element 100, a moving rod 200, a transmission assembly 300, a control handle 400, and a separation base 500.

[0022] Unlike existing technologies that utilize a combination of clamping arms and sleeves to achieve clamping structures, in this embodiment, the clamping member 100 is an integral structure assembled from multiple parts. This clamping member 100 does not rely on the assistance of a sleeve; it achieves bending deformation through its own structural deformation. Please refer to... Figure 2-5 The clamping member 110 includes at least two clamping arms 110. For example, Figure 2 and 3 As shown, each clamping arm 110 includes a clamping head 1111 and a flexible portion 1112. The clamping arms 110 are modular structures, meaning they are separate components that are then connected to each other to form a single integrated structure. The connection between the clamping arms 110 is typically a fixed connection; however, in some embodiments, the clamping arms 110 may also have a certain amount of space for movement to meet different functional requirements.

[0023] Please refer to Figure 2In one embodiment, the clamping head 1111 and the flexible portion 1112 in the same clamping arm 110 are integrally molded structures. This integral molding structure means that the entire part is machined from the same material in one piece, rather than being assembled from two or more parts. Integral molding structures (including other integral molding structures described below) can be manufactured using, but are not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is used, extremely small gaps can be achieved, which is beneficial for miniaturization of the overall structure and improving structural compactness.

[0024] Of course, in some embodiments, the assembly relationship between the clamping arms 110 can also be referenced. The clamping head 1111 and the flexible part 1112 in the same clamping arm 110 are separate structures, and then connected to each other to assemble into an integral clamping arm 110.

[0025] Please refer to Figure 4 In another embodiment, the clamping head 1111 and the flexible part 1112 in each clamping arm 110 are separate structures, that is, two separate components, which are then connected to each other to assemble into a whole clamping arm 110. Wherein, as Figure 4 As shown, the flexible portions 1112 of the different clamping arms 110 are connected as a single unit, forming a one-piece molded structure. This facilitates one-piece molding and eliminates the need for assembly. Of course, in other embodiments, such as... Figure 2 As shown, the flexible portions 1112 between different clamping arms 110 can also be separated from each other and then reassembled into one unit.

[0026] The separation base 500 serves to support the clamping member and also needs to be able to separate from the clamping member at specific times to temporarily retain the clamping member within the object being tested. The separation base 500 can be connected to the clamping member 100; this connection can be an integrally formed structure or a fixed connection structure. In some embodiments, such as... Figure 6-15 As shown, the separation base 500 can be detachably connected to the clamping member 100. However, in other embodiments, such as Figure 5 As shown, the separating base 500 can also be integrally formed with the flexible part 1112. Figure 5 In this configuration, the flexible portion 1112 is integrally connected to the separation base 500 via the connecting portion 120 (described in detail below), and the connecting portion 120 and the separation base 500 are connected via the first tear portion 540. Of course, the connecting portion 120 can also be omitted, and the flexible portion 1112 and the separation base 500 can be directly connected via the first tear portion 540.

[0027] In this clamping component 100, by disassembling some parts into separate structures and manufacturing them separately through the various embodiments described above, the manufacturing difficulty of individual parts can be reduced, and costs can be lowered. The various components can be connected by welding, bonding, or mechanical structural connections (including snap-fit, screw-fit, riveting, etc.).

[0028] Furthermore, the gripping arms 110 are arranged in a claw-like structure to grip the target object. This claw-like structure is designed to firmly grasp the target object, for example, in... Figure 1-15 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 2 , 4 When the object is closed as shown in Figure 5 (in a clamping state), it can be grasped, such as... Figure 20 and 21 As shown.

[0029] Please refer to Figure 2-5 In one embodiment, the flexible portion 1112 is a semi-cylindrical structure, which can be formed into a cylindrical structure when the clamping member 100 is closed. This semi-cylindrical shape refers to a non-complete cylindrical shape; it does not necessarily have to be half of the cylindrical structure, but can also be one-third of the entire cylindrical structure or other sizes. Furthermore, in other embodiments, the flexible portion 1112 can also be other structures, such as a sheet, and is not limited to this semi-cylindrical structure.

[0030] Unlike existing technologies where the clamping arm 110 is limited by a sleeve to achieve its opening and closing, in this embodiment, the opening and closing of the clamping arm 110 mainly relies on the deformation of the flexible portion 1112. The flexible portion 1112 has a deformable structure capable of bending in the closing direction of the clamping member 100 and / or bending in the opening direction of the clamping member 100. Please refer to... Figure 1 and 2 In the illustrated embodiment, the initial state of the clamping member 100 is a clamping state, meaning that the clamping member 100 is in a clamping state without deformation of the bendable portion 1112. At this time, the bendable portion 1112 has at least a deformable structure capable of bending in the opening direction of the clamping member 100, thereby... Figure 3 As shown, the clamping member 100 is opened.

[0031] The clamping head 1111 has a higher resistance to bending deformation than the flexible portion 1112, ensuring that the clamping arm 110 provides a better gripping effect on the target object. The bending deformation of the flexible portion 1112 is achieved through its structure. This bending deformation of the flexible portion 1112 is reversible, meaning that the flexible portion 1112 is elastic and can spring back to its original position when the external force is removed, thus this bending deformation can be repeated.

[0032] The lever 200 is used to control the opening and clamping states of the clamping member 100. Figure 6-15 In this embodiment, the moving rod 200 is a pull rod. In other embodiments, the moving rod 200 may also have other structures. The moving rod 200 is connected to the clamping member 100, and the movement of the moving rod 200 can control the movement of the clamping member 100 in the opening direction and in the clamping direction. The transmission assembly 300 serves to support the clamping member 100 and transmit motion and force to the moving rod 200.

[0033] Please refer to Figure 1 , 6 7. The transmission assembly 300 includes a sleeve assembly 310 and a transmission member 320 passing through the sleeve assembly 310, the transmission member 320 being connected to the moving rod 200. The clamping member 100 and the separating base 500 are detachably connected to ensure that the clamping member 100 can be disengaged from the separating base 500 when needed.

[0034] The separation base 500 is rotatably connected to the sleeve assembly 310, for example... Figure 6 and 7 As shown, the separating base 500 is fitted inside the sleeve assembly 310. The connection between the separating base 500 and the clamping member 100 allows both to rotate circumferentially within the sleeve assembly 310, enabling the clamping member 100 to rotate as a whole relative to the sleeve assembly 310. The sleeve assembly 310 is connected to a control handle 400, which forms a linkage structure with the transmission member 320 to control the movement of the transmission member 320, the motion 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 310, and can also use the control handle 400 to control the opening and closing of the clamping member 100.

[0035] The movement of the moving rod 200 can be along its axis or rotational, etc. For example, please refer to... Figure 6 and 7 In one embodiment, when the moving rod 200 moves axially away from the control handle 400 and closer to the clamping member 100 (moving to the right as shown in the figure), the moving rod 200 can drive the clamping member 100 to open outward, thereby moving the clamping member 100 to the open state. Please refer to... Figure 8 and 9 In one embodiment, when the moving rod 200 moves axially towards the control handle 400 and away from the clamping member 100 (moving to the left as shown in the figure), the moving rod 200 can drive the clamping members 100 to move inward towards each other, thereby moving the clamping members 100 to a clamping state. Of course, in other embodiments, the movement relationship between the moving rod 200 and the clamping member 100 can be... Figure 6-9The difference is as shown. For example, when the motion lever 200 moves toward the control handle 400, the drive clamp 100 opens, and when it moves toward the clamp 100, the drive clamp 100 closes.

[0036] The moving rod 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 moving rod 200. The three strokes can be in the same direction, or at least two of the strokes can be in different directions, or all three strokes can be in different directions.

[0037] As an example, please refer to Figure 6 and 7 At this time, the moving rod 200 is in the first stroke. When the moving rod 200 moves away from the control handle 400 along its axis and moves closer to the clamping member 100 (to the right in the figure), the moving rod 200 can drive the clamping member 100 to open outward, so that the clamping member 100 moves to the open state.

[0038] Please refer to Figure 8 and 9 At this time, the moving rod 200 is in the second stroke. When the moving rod 200 moves towards the control handle 400 along its axis and away from the clamping member 100 (to the left in the figure), the moving rod 200 can drive the clamping member 100 to move closer to each other inward, so that the clamping member 100 moves to the clamping state.

[0039] Please refer to Figure 10-15 At this point, the moving lever 200 is in its third stroke. As the moving lever 200 moves axially towards the control handle 400 and away from the clamping member 100 (to the left in the diagram), this third stroke is in the same direction as the second stroke and is closely connected. That is, when the clamping member 100 moves to the clamping state, the moving 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.

[0040] Please refer to Figure 10 and 11 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.

[0041] Please refer to Figure 12 and 13After the moving rod 200 completes its locking stroke, it enters the inner release stroke. When the moving rod 200 moves to the position shown in the figure, the clamping member 100 separates from the moving rod 200, and the moving rod 200 can no longer move the clamping member 100, losing control of the clamping member 100. The clamping member 100 is then held in the locked state. During this process, the movement stroke of the moving rod 200 is the inner release stroke.

[0042] Please refer to Figure 14 and 15 After completing its inner release stroke, the moving rod 200 enters its outer release stroke. When the moving rod 200 reaches the position shown in the figure, the clamping member 100 and the separation base 500 separate, leaving the clamping member 100 on the target object it was holding. The separation base 500, the moving rod 200, and the transmission assembly 300 can then be extracted from the object being tested. The movement of the moving rod 200 during this process is the outer release stroke.

[0043] In the structures shown in the above embodiments, the sleeve in the existing structure is omitted. The clamping member 100 is directly driven by the moving rod 200, and the opening and closing of the clamping member 100 is achieved by combining the deformation state of the flexible portion 1112. Since the limiting effect of the sleeve on the clamping arm 110 is eliminated, the clamping arm 110 deforms from the flexible portion 1112, and its deformation area is closer to the bottom of the entire clamping member 100. Therefore, under the same opening requirement, the length of this integrated clamping member 100 is shorter than the combination of the clamping arm 110 and the sleeve in the prior art. At the same length, the integrated clamping member 100 can open to a larger angle than the combination of the clamping arm 110 and the sleeve in the prior art, making it easier to grip the tissue of the target object. After the clamping member 100 disengages from the separating base 500, this shorter clamping member 100 remains temporarily inside the target object. This reduces discomfort caused by excessively long clamp heads left by hemostatic clips (or tissue clips) and minimizes excessive wear on the target object caused by excessively long clamp heads left by hemostatic clips (or tissue clips). In addition, this integrated structure avoids the component fitting clearance required for shaft-hole mating or sliding displacement, thus resulting in higher bending repeatability of the clamping arm 110.

[0044] Moreover, the entire clamping component 100 is simple to manufacture. Compared to the multi-part assembly structure of existing hemostatic clips (or tissue clips), the use of this one-piece molded clamping component 100 results in fewer parts, a simpler structure, lower assembly requirements, significantly reduced costs, and higher control precision. Similarly, the overall length of the clamping component 100 is shorter than that of existing hemostatic clips (or tissue clips). Because the inner diameter of the endoscopic instrument channel is very limited, this shorter clamping component 100 can more easily pass through the endoscopic instrument channel.

[0045] Furthermore, as mentioned above, the bending deformation of the bendable portion 1112 is achieved through its integral structure. Please refer to... Figure 3 , 7 In some embodiments, 16-19, the end of the clamping member 100 closest to the separating base 500 is the proximal end, and the end away from the separating base 500 is the distal end. The direction from the proximal end to the distal end of the clamping member 100 is the longitudinal direction of the clamping member 100. To achieve this integrated deformable structure, the deformable structure includes a plurality of first contraction slots 1113, which are arranged sequentially along the longitudinal direction. The first contraction slots 1113 can be achieved by laser cutting, for example, using metal sheets or pipes, and the first contraction slots 1113 are processed by laser cutting.

[0046] In one embodiment, such as Figure 2 As shown, the clamping member 100 remains in the clamping state in the initial state, the first contraction slots 1113 remain in the initial state, and the flexible portion 1112 does not deform. Figure 3 As shown, when the clamping member 100 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 arms 110 that are opposite to each other) to contract, so that the entire clamping head 1111 opens.

[0047] Please refer to Figure 2 , 3 16-19, In ​​one embodiment, the first contraction joint 1113 extends circumferentially around the flexible portion 1112. The first contraction joints 1113 are arranged in parallel. Of course, the first contraction joints 1113 can be arranged in other non-parallel arrangements besides being parallel to each other. By arranging the first contraction joints 1113 uniformly in parallel circumferentially along the flexible portion 1112, the bending deformation direction of each first contraction joint 1113 can be unified, making the bending deformation of the clamping member 100 smoother and more stable.

[0048] To achieve smoother bending changes, in one embodiment, the first contraction joint 1113 is divided into several groups, and each group of first contraction joints 1113a has at least one first contraction joint 1113. For example... Figure 2 , 3 as well as Figure 16-17 As shown, in this embodiment, each group of first contraction joints 1113a has two first contraction joints 1113. As... Figure 18 and 19As shown, in this embodiment, each group of first shrinkage seams 1113a has one first shrinkage seam 1113. The contraction of each first shrinkage seam 1113 allows the flexible portion 1112 to have a certain bending angle. With the combination of multiple groups of first shrinkage seams 1113, the flexible portion 1112 can have a larger opening and closing angle. The length formed by the combination of all the first shrinkage seams 1113 in the longitudinal direction determines the bending deformation area of ​​the entire flexible portion 1112. The number of first shrinkage seam groups 1113a, the longitudinal gap between adjacent first shrinkage seam groups 1113a, and the number of first shrinkage seams 1113 within a first shrinkage seam group 1113a can be flexibly set according to actual needs. For example, there can be 4-6 groups of first shrinkage seams 1113a.

[0049] Please refer to Figure 19 In one embodiment, the first contraction slot 1113 is an elongated groove, and the middle of the first contraction slot 1113 has two opposing protruding arc-shaped edges 1113b. When the clamping member 100 is opened to a predetermined position, the arc-shaped edges 1113b will contact each other, thereby determining the maximum opening angle. When the clamping member 100 is in a clamping state, the arc-shaped edges 1113b will contact each other, thereby providing support for the clamping member 100.

[0050] Considering the needs of minimally invasive surgery, clamping devices are typically very delicate and compact structures. Therefore, while maintaining a small size, the clamping component 100 should generally not be made of a thick material. However, a thinner material requirement may weaken the strength of the flexible portion 1112. Specifically, for example... Figure 3 As shown, when the operator applies excessive external force, causing the clamping arm 110 to bend outward at an excessive angle, the clamping arm 110 may break from the bendable portion 1112. Based on this, in one embodiment, as... Figure 3 As shown, the bendable portion 1112 has a limiting structure 1114, which limits the maximum angle at which the bendable portion 1112 bends in the opening direction. That is, within the maximum angle, the bendable portion 1112 can be bent freely. When its bending angle reaches the maximum angle, the limiting structure 1114 begins to function, limiting the bendable portion 1112 from continuing to bend outward, thus protecting the bendable portion 1112 and the clamping member 100. This limiting structure 1114 mainly achieves the limitation of the maximum angle by setting an upper limit in the longitudinal direction of the clamping member 100.

[0051] Please refer to Figure 3 as well as Figure 16-19 In one embodiment, each limiting structure 1114 includes a plurality of limiting units 1114a arranged longitudinally along the clamping member 100. Each limiting unit 1114a includes a first limiting block 1115 and a second limiting block 1116 disposed opposite to each other. Figure 17As shown in the two enlarged partial views a and b, there is a longitudinally arranged gap 1117 between the first limiting block 1115 and the second limiting block 1116. During the bending of the flexible portion 1112 in the opening direction, the first limiting block 1115 and the second limiting block 1116 approach each other and form a fastening structure (see...). Figure 17 (See enlarged view shown in b). That is, in the initial state, the first limiting block 1115 and the second limiting block 1116 are as follows: Figure 17 As shown in Figure a, a gap 1117 is left. When the clamping member 100 gradually opens outward, the first limiting block 1115 and the second limiting block 1116 move relative to each other in the longitudinal direction, and the gap 1117 gradually decreases. Finally, when the bendable part 1112 reaches its maximum angle, at this time... Figure 17 As shown in Figure b, the first limiting block 1115 and the second limiting block 1116 are fitted together to form a limit.

[0052] like Figure 16-19 In one embodiment, the first limiting block 1115 and the second limiting block 1116 are two interlocking limiting hook structures. This limiting hook structure can also be replaced with other structures having similar functions. Figure 3 In one embodiment, the first contraction seam 1113 is located in the middle of the circumference of the bendable portion 1112, and there are at least two sets of limiting structures 1114. On the circumference of the bendable portion 1112, limiting structures 1114 are respectively provided on both sides of the bendable portion 1112, which can further ensure that the entire bendable portion 1112 can bend and be limited synchronously.

[0053] Please refer to Figure 3 as well as Figure 16-19 In one embodiment, within the same limiting unit 1114a, the first limiting block 1115 and the second limiting block 1116 are formed by dividing the sidewall of the flexible portion 1112 located on the side of the first contraction joint 1113. The first limiting block 1115 and the second limiting block 1116 are connected at one end near the first contraction joint 1113, while the other ends are separated. When the clamping member 100 opens outwards, the first limiting block 1115 and the second limiting block 1116 also open along with the clamping member 100.

[0054] like Figure 3 as well as Figure 16-19 As shown, each group of first shrinkage seams 1113a can be aligned with a limiting unit 1114a in the circumferential direction, thereby ensuring that the limiting effect of the limiting unit 1114a can be accurately applied to the corresponding first shrinkage seam 1113, so as to prevent the first shrinkage seam 1113 from continuing to shrink and deform after bending to the maximum angle, thus preventing the breakage of the bendable part 1112.

[0055] The number of limiting units 1114a can be greater than the number of first shrinkage joint groups 1113a, thereby completely covering all first shrinkage joints 1113 in the longitudinal direction to achieve a better limiting effect. Of course, the number of limiting units 1114a can also be less than or equal to the number of first shrinkage joint groups 1113a.

[0056] Further, please refer to Figure 16-19 In one embodiment, a second contraction joint 1118 is provided between the first limiting block 1115 and the second limiting block 1116, with at least a portion of the contraction joint 1112 circumferentially disposed. The second contraction joint 1118 can separate the first limiting block 1115 and the second limiting block 1116, thereby allowing them to move relative to each other. The second contraction joint 1118 communicates with the gap 1117 between the first limiting block 1115 and the second limiting block 1116.

[0057] Considering that the bending motion of the clamping member 100 in the opening direction and the bending motion in the clamping direction are often accompanied by torsional motion around its circumference, please refer to... Figure 16-19 In one embodiment, the two ends of each set of first contraction slits 1113a respectively extend into the space between the second contraction slits 1118 of two longitudinally adjacent limiting units 1114a. The overlapping area between the first contraction slits 1113 and the second contraction slits 1118 forms a twisted deformation section 1119, allowing the bendable portion 1112 to bend and twist. With the twisted deformation section 1119 provided, the bending deformation of the clamping member 100 is smoother, and the bendable portion 1112 is prevented from breaking due to torsion. By adjusting the circumferential length and longitudinal height of the twisted deformation section 1119, the maximum opening angle, bending flexibility, or support of the bendable portion 1112 can be further changed, which can be flexibly set according to actual needs. For example, the twisted deformation section 1119, through its own structure, can also limit the maximum opening angle. This limiting effect can be combined with the aforementioned limiting structure 1114 to jointly form the maximum opening angle of the bendable portion 1112.

[0058] exist Figure 17 and 19 In the illustrated embodiment, the second contraction joint 1118 is arranged in a straight line. Figure 18 In the illustrated embodiment, the second contraction joint 1118 is U-shaped.

[0059] Furthermore, as mentioned above, after the clamping member 100 clamps the target object 1, the moving rod 200 needs to move together with the clamping member 100 to the predetermined locking structure for locking. However, in actual use, when the clamping member 100 clamps human tissue with different hardness or thickness (e.g., Figure 20 and 21As shown, this limits the closing angle of the clamping member 100. Because the closing angle is related to the stroke of the moving rod 200, at this time, the clamping member 100 and the moving rod 200 cannot move to the position of the locking structure, and the clamping member 100 cannot remain in the clamping state.

[0060] For this question, please refer to... Figure 20 and 21 The second contraction joint 1118 has a gap in the longitudinal direction. The second contraction joint 1118 of the limiting structure 1114 forms an adaptive floating structure that can deform in the clamping direction, so that when the clamping member 100 clamps the target object 1, the flexible part 1112 can adaptively bend and deform in the closing direction according to the volume of the target object 1, providing an adaptive stroke range for the moving rod 200 and the clamping member 100, increasing the rigid deformation margin of the moving rod 200, and always allowing the moving rod 200 and the clamping member 100 to move to the locking position of the locking structure, so as to achieve accurate and reliable locking.

[0061] For details, please refer to Figure 20 When the clamping member 100 clamps a thinner target object 1, the clamping member 100 can close normally, and the second contraction slit 1118 maintains a normal gap (e.g., Figure 20 (As shown in the enlarged view in section a) the moving rod 200 and the clamping member 100 can move precisely to the position of the locking structure as shown in the locking stroke above, locking the clamping member 100 in the clamping state. Please refer to... Figure 21 When the clamping member 100 clamps a relatively thick target object 1, the clamping members 100 cannot close together as shown. Figure 20 As shown, if the moving rod 200 is pulled further, the second contraction slot 1118 can deform in the closing direction of the clamping member 100 (e.g., Figure 21 (Partial enlarged view shown in a) For example, in one embodiment, each second contraction joint 1118 can provide 0.02-0.05 mm of compression in the longitudinal direction. With the number of second contraction joints 1118 shown in the figure, the cumulative amount of multiple second contraction joints 1118 can provide a deformation of approximately 0.1-0.2 mm, thereby allowing the bendable portion 1112 to... Figure 21 The inward bending deformation is shown. Figure 21 The flexible portion 1112 is slightly deformed outward on both sides, thereby compensating for the lost stroke on the clamping member 100, so that the clamping member 100 can finally be locked onto the locking structure.

[0062] The above embodiment illustrates a structure in which the bendable portion 1112 achieves bending deformation by opening a contraction joint. However, the deformation structure of the bendable portion 1112 in this embodiment is not limited to this, and can also be achieved in other ways. For example, please refer to... Figure 22In one embodiment, the flexible portion 1112 in the clamping member 100 can be made of a material that is more easily bent and deformed, such as a material that is more easily bent and deformed than the clamping head 1111 and the connecting portion 120 (described in detail below), such as a metal or plastic material with good bending properties, so that when the moving rod 200 drives the clamping member 100 to move, the flexible portion 1112 can be bent and deformed preferentially. Of course, the flexible portion 1112 can also adopt other structures with good bending and deformation properties, such as a metal braided structure.

[0063] Please refer to Figure 23 In one embodiment, the thickness of the bendable portion 1112 in the clamping member 100 may be set to be thinner than other portions, such as thinner than the clamping head 1111 and the connecting portion 120, so that when the moving rod 200 drives the clamping member 100 to move, the bendable portion 1112 can be bent and deformed preferentially.

[0064] Furthermore, to reduce mutual interference between the clamping members 100 when closed, in one embodiment, the opposite ends of the clamping members 100 are provided with a clearance structure 1110 to allow the clamping members 100 to avoid each other when closed. Please refer to Figure 18 In this embodiment, the opposing ends of the clamping members 100 retract inward to form a clearance structure 1110, and a clearance groove is formed between the two opposing clamping members 100 through the retracted area. The width of the clearance groove gradually increases along the longitudinal direction of the clamping members 100, wherein the end of the clearance groove near the clamping head 1111 is wider than the other end. Of course, the clearance structure 1110 can also be other structures that can perform clearance functions, and is not limited to the structure shown in the figure.

[0065] Furthermore, the moving rod 200 can be connected to the clamping member 100 through various structures, as long as it can drive the clamping member 100 to move in the opening direction and the clamping direction. The moving rod 200 can be directly connected to the clamping member 100, or it can be connected to the clamping member 100 through the clamping member connecting structure 600.

[0066] Please refer to Figure 7 and 24 In one embodiment, the clamping member connection structure 600 includes two connecting rods 610. One end of each connecting rod 610 is connected to the distal end of the moving rod 200 and can rotate around an axis 620. The other ends are connected to the horizontal axis on the clamping head 1111 and can also rotate around the horizontal axis. The connecting rod 610 assembly is Y-shaped, which is intended to effectively transmit the pushing and pulling forces of the moving rod 200 to the clamping head 1111, thereby realizing the opening and closing control of the clamping head 1111.

[0067] Please refer to Figure 24When the moving rod 200 moves during its first stroke, as the moving rod 200 moves away from the end of the control handle 400, the clamping member 100 can open in the opening direction. The rotation center A of the connecting rod 610 and the moving rod 200 can cross the line B connecting the two rotation centers between the connecting rod 610 and the clamping head 1111, thus forming a self-locking mechanism. This keeps the clamping member 100 in the open state, preventing it from being easily closed by external force; the clamping head 1111 can only be retracted by controlling the control handle 400.

[0068] Of course, the clamping member connection structure 600 can also be connected using other structures, such as the various connection methods of the clamping arm 110 and the pull rod disclosed in the prior art.

[0069] Further, please refer to Figure 3 , 4 In one embodiment, the clamping member 100 includes a connecting portion 120. The connecting portion 120, the flexible portion 1112, and the clamping head 1111 are sequentially connected as a single unit. The separation base 500 is detachably connected to the connecting portion 120.

[0070] Please refer to Figure 3-15 The connecting portion 120 has the aforementioned locking structure 121, which is used to lock the clamping member 100 in a clamping state. Of course, in other embodiments, the clamping member 100 may not include the connecting portion 120, and the locking structure 121 may be directly provided on the flexible portion 1112 or other structures.

[0071] In one embodiment, the moving rod 200 or the clamping member connecting structure 600 has a locking engagement portion 631. When the moving rod 200 moves along the third stroke, the locking structure 121 is located on the moving path of the locking engagement portion 631. When the locking engagement portion 631 moves to the locking structure 121, the two form a locking engagement, keeping the clamping member 100 in a clamping state.

[0072] Please refer to Figure 6-15 In one embodiment, the clamping member 100 forms a cylindrical structure. One end of the moving rod 200 extends into the cylindrical structure and connects to the clamping member 100. The locking engagement portion 631 includes an elastic body protruding toward the clamping member 100, for example, the elastic body is a spring sheet, which is inclined toward the distal end of the clamping member 100 along its protruding direction. The locking structure 121 includes a groove that can engage with the elastic body. The elastic body is located inside the clamping member 100 and is in a compressed deformation state, and the elastic body can engage with the groove under the action of elastic force.

[0073] For details, please refer to Figure 15In one embodiment, the locking engagement part 631 is disposed on a cylindrical body 630, which is part of the clamping member connecting structure 600 and can form a linkage structure with the connecting rod 610 via a shaft 620. The moving rod 200 passes through the cylindrical body 630 and is connected to the shaft 620. The cylindrical body 630 can move with the moving rod 200 toward the control handle 400 until it is locked by the locking structure.

[0074] In other embodiments, other structures that may achieve the locking function may also be used, such as the clamping arm 110 or the locking method of the lever and sleeve disclosed in the prior art.

[0075] For a more stable locking of the clamping component 100, please refer to... Figure 15 In one embodiment, there are two or more locking structures 121 and locking engagement portions 631 (two are shown in the figure). To ensure even force distribution, in one embodiment, the locking structures 121 are evenly distributed around the circumference of the clamping member 100 (i.e., adjacent locking structures 121 are spaced at the same angle), and the locking engagement portions 631 are positioned opposite to the clamping member 100, for example, they can also be evenly distributed around the circumference of the moving rod 200.

[0076] Further, please refer to Figure 7 , 13 In one embodiment, for mounting the separation base 500, the connecting portion 120 is provided with a snap-fit ​​portion 122, and the separation base 500 has a support leg 510. The support leg 510 engages with the snap-fit ​​portion 122. The moving rod 200 has a push top 283. When the moving rod 200 moves along its third stroke, the separation base 500 is positioned on the moving path of the push top 283. The push top 283 can push the separation base 500 toward the control handle 400 to separate the connecting portion 120 and the separation base 500. Please refer to... Figure 13 and 15 For example, the separating base 500 has a protrusion 530 located on the moving path of the pusher 283. This protrusion 530 can be the bottom of the cylindrical separating base 500, which has a through hole through which the moving rod 200 passes. To engage with the connecting part 120, the separating base 500 may have a bent buckle on its support leg 510. The engaging part 122 can be a groove that mates with the buckle, and the buckle extends into the groove to engage. Under the push of the pusher 283, the buckle can deform and disengage from the engaging part 122.

[0077] Further, please refer to Figure 7-15In one embodiment, the moving rod 200 achieves internal disengagement through a split-assembly structure. Specifically, the moving rod 200 has a snap-fit ​​groove 281 with an opening 282 smaller than its cavity. The moving rod 200 is snapped into the clamping member connecting structure 600 through the snap-fit ​​groove 281, and can be connected to the mounting shaft 620 of the connecting rod 610. When the moving rod 200 moves along the first stroke and the second stroke, due to the blocking effect of the opening 282, the clamping member connecting structure 600 and the clamping member 100 can move together with the moving rod 200 to realize the opening and clamping of the clamping member 100. When the moving rod 200 is in the inner disengagement stroke, the clamping member 100 and the clamping member connecting structure 600 are blocked and cannot continue to move towards the control handle 400. At this time, under the action of external force, the clamping member connecting structure 600 disengages from the opening 282 of the snap-fit ​​groove 281, and the moving rod 200 disengages from the clamping member connecting structure 600, thus achieving inner disengagement.

[0078] The above is merely an example of an internal disengagement structure. In other embodiments, the moving rod 200 can also be a one-piece structure. For example, in one embodiment, the moving rod 200 has a retaining section and a separating section, which are connected integrally by a second tear. The retaining section is connected to the clamping body, and a locking engagement portion is located on the retaining section. When the moving rod 200 moves along its third stroke, the second tear breaks, and the retaining section and the separating section separate. Furthermore, the moving rod 200 and the clamping member 100 can also employ other internal disengagement structures to achieve separation, such as the internal disengagement structure of the pull rod and the clamping arm 110 in the prior art.

[0079] Further, please refer to Figure 1 and 7 Regarding the transmission assembly 300, the sleeve assembly 310 typically includes a spring support sleeve 311, in which the transmission element 320 (e.g., a traction control line) is transmitted. The moving rod 200 can be fixedly connected to the transmission element 320 via a reducing adapter 321 or other structure. A connecting pipe 312 is fixedly mounted on the spring support sleeve 311, and a fixing seat 313 is provided on the connecting pipe 312. The connecting pipe 312 is rotatably connected to the separating base 500 and the clamping member 100, so that the entire clamping member 100 can rotate relative to the transmission assembly 300 together with the separating base 500.

[0080] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A clamping component of an insertable tissue clamping device, characterized in that, The clamping member includes at least two clamping arms, which are separate structures but interconnected. Each clamping arm includes a clamping head and a flexible portion. The clamping head and flexible portion within the same clamping arm are separate structures but interconnected, or the clamping head and flexible portion are integrally formed. The clamping arms are arranged in a claw-like structure to clamp the target object. The flexible portion has a deformable structure that allows it to bend in the closing direction of the clamping member and / or in the opening direction of the clamping member.

2. A clamping component of an insertable tissue clamping device, characterized in that, The clamping member includes at least two clamping arms, each clamping arm including a clamping head and a flexible portion. The clamping head and the flexible portion in each clamping arm are separate structures, but connected to each other. The flexible portions of different clamping arms are integrally formed structures. The clamping arms are arranged in a claw-like structure to clamp the target object. The flexible portion has a deformable structure that can be bent in the closing direction of the clamping member and / or in the opening direction of the clamping member.

3. The clamping member as described in claim 1 or 2, characterized in that, The deformable structure includes a plurality of first contraction joints, which are arranged sequentially along the longitudinal direction of the clamping member.

4. The clamping member as described in claim 3, characterized in that, The flexible portion has a plurality of second contraction slits extending circumferentially thereon, and the second contraction slits are arranged longitudinally between each other; the two ends of each group of first contraction slits respectively extend into the space between two longitudinally adjacent second contraction slits, and the overlapping area between the first contraction slits and the second contraction slits forms a torsional deformation section, so that the flexible portion can be bent and torsional deformed.

5. The clamping member as described in claim 4, characterized in that, The first shrinkage seam extends circumferentially around the flexible portion; the flexible portion has a limiting structure, which is at least two sets. In the circumferential direction of the flexible portion, the limiting structure is provided on at least one side of the flexible portion to limit the maximum angle of bending of the flexible portion toward the opening direction of the clamping member.

6. The clamping member as described in claim 5, characterized in that, Each of the limiting structures includes a plurality of limiting units arranged longitudinally along the clamping member. Each limiting unit includes a first limiting block and a second limiting block disposed opposite to each other. There is a gap between the first limiting block and the second limiting block disposed longitudinally. The second contraction seam communicates with the gap. During the bending process of the flexible part in the opening direction, the first limiting block and the second limiting block approach each other and form a fastening structure.

7. The clamping member as described in claim 6, characterized in that, In the same limiting unit, the first limiting block and the second limiting block are formed by the sidewall of the flexible part located on the side of the first shrinkage seam through the second shrinkage seam. The first limiting block and the second limiting block are connected as one piece at one end near the first shrinkage seam, and the other end is separated from each other.

8. The clamping member as described in claim 7, characterized in that, The initial state of the clamping member is the clamping state; the second contraction joint has a gap in the longitudinal direction, and the second contraction joint of the limiting structure forms an adaptive floating structure that can deform in the clamping direction, so that when the clamping member clamps the target object, the flexible part can adaptively bend and deform in the closing direction according to the volume of the target object.

Images