Adjustable bendable capture pincers

Abstract

This utility model discloses an adjustable bending gripper, comprising: a handle, a flexible tube, grippers, a first traction rope, and a second traction rope. The handle includes a rear end member, a front end member, a first drive mechanism, and a second drive mechanism. The rear end member is rotatably connected to the front end member and flexibly connected to it. The grippers include a first connecting member and a clamping member. The first connecting member is connected to the flexible tube. One end of the first traction rope is connected to the first drive mechanism, and the other end is driveably connected to the clamping member. The first drive mechanism can drive the first traction rope to move the clamping member, thereby controlling the opening and closing of the grippers. One end of the second traction rope is connected to the second drive mechanism, and the other end is connected to the first connecting member. The second drive mechanism can drive the second traction rope to rotate the grippers. In use, the first traction rope can be driven to open and close the grippers. By rotating the rear end member and driving the second traction rope, the grippers can bend in a directional manner, reducing collisions between the grippers and the blood vessel walls, thereby reducing damage to the blood vessels.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an adjustable bending grasping clamp. Background Technology

[0002] In interventional medicine, when retrieving filters implanted in blood vessels, the grasping forceps are crucial instruments that must precisely reach the blood vessel via the vascular access to complete the grasping operation. In some techniques, the grasping forceps' function is limited to the simple opening and closing of the distal jaws to hold and secure the filter. However, when these forceps are pushed to the target position to grasp the filter, if the filter's position in the blood vessel has shifted, the surgeon can only roughly adjust the jaw orientation by pushing the entire forceps or rotating the instrument's shaft. This method carries the risk of the jaws not accurately aligning with the filter, resulting in excessively long retrieval time or even failure to retrieve the filter. Furthermore, rotating the entire instrument's shaft can cause hard friction between the instrument and the blood vessel wall, posing a serious risk of vascular trauma. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a grasping clamp that can adaptively adjust the grasping angle and direction according to the position of the target object, reducing the risk of damage to blood vessels while improving the accuracy of capturing the target object.

[0004] The grappling clamp according to an embodiment of the present invention includes: a handle, a flexible tube, grippers, a first traction rope, and a second traction rope.

[0005] The handle includes a front end member, a rear end member, a first drive mechanism, and a second drive mechanism. The rear end member is rotatably connected to the front end member, and the rotation axis of the rear end member extends along a first direction, which is the direction from the front end member to the rear end member. The flexible tube is connected to the front end member. The gripper includes a first connector and at least two clamping members. The first connector is connected to the end of the flexible tube opposite to the front end member, and the clamping members are movably connected to the first connector. The first traction rope is disposed inside the flexible tube, with one end connected to the first drive mechanism and the other end connected to the gripper. The first drive mechanism can drive the first traction rope to move along its own axis to move the clamping members and adjust the opening and closing degree of the gripper. The second traction rope is disposed inside the flexible tube, with one end connected to the second drive mechanism and the other end connected to the connecting part. The second drive mechanism can drive the second traction rope to move along its own axis to bend the flexible tube.

[0006] The capture tongs according to the embodiments of this utility model have at least the following beneficial effects:

[0007] In this embodiment, one end of the flexible tube is connected to the first connector and the other end is connected to the front end. The handle includes a first drive mechanism and a second drive mechanism. The first drive mechanism is used to drive the first traction rope to move, thereby realizing the opening and closing of the gripper. The opening direction of the gripper is adjusted by the rotation of the rear end relative to the front end, thereby improving the accuracy of capturing the target object. Furthermore, the second drive mechanism can drive the second traction rope to move along its own axis, so that the flexible tube bends. This not only deforms the bending direction of the flexible tube to adapt to the blood vessel, thereby reducing the collision between the gripper and the blood vessel wall in complex blood vessel environments and reducing the risk of damage to the blood vessel, but also adjusts the angle formed by the gripper and the blood vessel wall to capture the filter more accurately.

[0008] According to some embodiments of the present invention, the first connector includes a bending adjustment connector, which is sleeved on the flexible tube and connected to the flexible tube. The bending adjustment connector includes a sub-connector, which is located at a position offset from the axis of the flexible tube.

[0009] According to some embodiments of the present invention, the flexible tube has a first cavity and a second cavity, the first traction rope is located in the first cavity, and the second traction rope is located in the second cavity.

[0010] According to some embodiments of the present invention, the axis of the first cavity is arranged to coincide with the axis of the flexible tube, and the axis of the second cavity is offset from the axis of the flexible tube.

[0011] According to some embodiments of the present invention, the flexible tube includes a main body section and a bending section connected to each other. One end of the main body section away from the bending section is connected to the front end member, and one end of the bending section away from the main body section is connected to the first connecting member. The length of the bending section is less than the length of the main body section, and the hardness of the bending section is less than the hardness of the main body section.

[0012] According to some embodiments of the present invention, the flexible tube includes a spring tube and a protective tube covering the outside of the spring tube, wherein the spring tube is a metal structure and the protective tube is a non-metallic flexible structure.

[0013] According to some embodiments of the present invention, the spring tube includes a first tube segment located in the main body section and a second tube segment located in the bending section, wherein the pitch of the second tube segment is greater than the pitch of the first tube segment.

[0014] According to some embodiments of the present invention, the front end member includes a first connecting hole extending along a first direction. The inner wall of the first connecting hole includes a first limiting surface and a second limiting surface. The first limiting surface faces the rear end member. The handle also includes a second connecting member. The second connecting member is connected to the spring tube. The second connecting member has a third limiting surface and a fourth limiting surface facing away from the rear end member. The second connecting member is inserted into the first connecting hole. The third limiting surface abuts against the first limiting surface to prevent the flexible tube from moving away from the rear end member. The fourth limiting surface abuts against the second limiting surface to prevent the flexible tube from rotating relative to the front end member.

[0015] According to some embodiments of the present invention, the front end member has a first mounting groove extending along a first direction and a first opening communicating with the first mounting groove, and the rear end member has a second mounting groove extending along a first direction and a second opening communicating with the second mounting groove, wherein the second mounting groove communicates with the first mounting groove.

[0016] The first driving mechanism includes a push block and a third connecting member. The push block is sleeved on the outside of the rear end member and can move relative to the rear end member in the first direction. The third connecting member is connected to the inner wall of the push block and extends from the first opening into the second mounting groove. The first traction rope passes through the first mounting groove and extends into the second mounting groove and is connected to the third connecting member.

[0017] The second drive mechanism includes a knob and a fourth connector. The fourth connector is movably connected to the inner wall of the second mounting groove and partially extends out of the second mounting groove from the second opening. The knob is sleeved on the fourth connector and screwed into it. The knob is also sleeved on the front end and can rotate relative to the front end to drive the fourth connector to move in the first direction. The second traction rope is connected to the fourth connector.

[0018] According to some embodiments of the present invention, the knob includes an elastic portion that can be deformed radially along the knob under pressure to abut against the fourth connector.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of the capture pincers according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A sectional view;

[0023] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0024] Figure 4 for Figure 1 Cross-sectional view of the flexible tube and grippers;

[0025] Figure 5 This is a cross-sectional view of the flexible tube, the second connector, and the front end piece.

[0026] Figure label:

[0027] Handle 100, front end piece 110, first mounting groove 111, first opening 112, first connecting hole 113, first limiting surface 114, second connecting hole 115, limiting part 116, second limiting surface 117, limiting hole 118, rear end piece 120, second mounting groove 121, second opening 122, retaining ring 123, limiting groove 124, first drive mechanism 130, push block 131, anti-slip groove 1311, third connecting piece 132, second drive mechanism 140, knob 141, fourth connecting piece 142;

[0028] Flexible tube 200, main body section 210, bending section 220, first cavity 230, second cavity 240, spring tube 250, protective tube 260;

[0029] Gripper 300, first connector 310, bending connector 311, sub-connector 3111, mounting part 312, rotating connector 313, receiving groove 314, clamping member 320, connecting rod 330;

[0030] First traction rope 400, second traction rope 500;

[0031] Second connector 600, third limiting surface 610, fourth limiting surface 620, limiting post 630. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as hindering this utility model.

[0033] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as an obstacle to this utility model.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] In interventional medicine, when retrieving implanted filters or removing diseased tissue or other implants, grasping forceps are crucial instruments that must precisely reach the blood vessel via vascular access to perform the grasping operation. In some techniques, the grasping forceps' function is limited to the simple opening and closing of the end grippers to hold and secure the filter. However, when these forceps are pushed to the target position to grasp the filter, if the filter's position in the blood vessel has shifted, the surgeon can only roughly adjust the gripper's orientation by pushing the entire forceps or rotating the instrument's shaft. This method carries the risk of the grippers not accurately aligning with the filter, resulting in excessively long filter retrieval time or even filter retrieval failure. Furthermore, rotating the entire instrument's shaft can cause hard friction between the instrument and the blood vessel wall, posing a serious risk of vascular trauma.

[0037] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a grasping forceps that can move more easily within blood vessels, reducing the risk of damage to the blood vessels.

[0038] Reference Figures 1 to 4 The capture clamp in this embodiment includes: a handle 100, a flexible tube 200, a gripper 300, a first traction rope 400, and a second traction rope 500.

[0039] The handle 100 includes a front end 110, a rear end 120, a first drive mechanism 130, and a second drive mechanism 140 (e.g., ...). Figure 1As shown, the front end 110 and rear end 120 are, for example, injection molded from high-strength medical-grade polyoxymethylene (POM) material, thus ensuring structural strength while possessing lightweight characteristics, facilitating prolonged handheld operation by doctors. The rear end 120 is rotatably connected to the front end 110, and the rotation axis of the rear end 120 extends along a first direction, which is the direction from the front end 110 to the rear end 120. Figure 3 As shown in the example, the front end member 110 has a second connecting hole 115, and the inner wall of the second connecting hole 115 has a limiting part 116. The rear end member 120 has a limiting groove 124, which is arranged around the axis of the second connecting hole 115. The rear end member 120 is rotatably inserted into the second connecting hole 115 of the front end member 110. The limiting part 116 cooperates with the limiting groove 124 to prevent the front end member 110 from falling off.

[0040] The flexible tube 200 is connected to the front end member 110. The gripper 300 includes a first connecting member 310 and at least two clamping members 320. The first connecting member 310 is connected to the end of the flexible tube 200 opposite to the front end member 110, and the clamping members 320 are movably connected to the first connecting member 310. A first traction rope 400, such as a polymer braided rope or steel cable, is disposed within the flexible tube 200. One end of the first traction rope 400 is connected to the first drive mechanism 130, and the other end is drively connected to the gripper 300 (e.g., ...). Figure 3 and Figure 4 (As shown). The first drive mechanism 130 can drive the first traction rope 400 to move along its own axis, thereby moving the clamping member 320 and adjusting the opening and closing degree of the gripper 300. For example, the gripper 300 includes two intersecting clamping members 320, which are rotatably connected to the first connecting member 310. The gripper 300 also includes two connecting rods 330, which are rotatably connected to one end of the two clamping members 320, and the other end of each connecting rod 330 is rotatably connected to the first traction rope 400. The first drive mechanism 130 includes, for example, a third connecting member 132, which is rotatably connected to the rear end member 120. When the doctor drives the third connecting member 132 to rotate by hand, the first traction rope 400 can be wrapped around the outside of the third connecting member 132, thereby causing the first traction rope 400 to move around its own axis, causing the clamping member 320 to rotate, thereby causing the ends of the clamping member 320 away from the connecting rods 330 to move closer to each other, thus closing the gripper 300. For example, the third connector 132 is movably connected to the rear end member 120 via a slide rail and slide groove, or a guide rail and slider, so that the third connector 132 can move relative to the rear end member 120 in a first direction (e.g., Figure 3 This pulls the first traction rope 400.

[0041] The second traction rope 500 is, for example, a polymer material rope or a steel cable. The second traction rope 500 is disposed within the flexible tube 200. One end of the second traction rope 500 is connected to the second drive mechanism 140, and the other end is connected to the connecting part 311 (e.g., Figure 3 and Figure 4 As shown, the connecting part 311 has an installation groove. The other end of the second traction rope 500 extends from the flexible tube 200 into the installation groove and is fixed to the first connector 310 by welding. The installation groove is offset from the axis of the flexible tube 200. The second drive mechanism 140 can drive the second traction rope 500 to move along its own axis. Thus, when the second traction rope 500 is subjected to tension, it can drive the distal end of the second traction rope 500 to pull the flexible tube 200 to bend to one side, so that the flexible tube 200 deforms in the specified direction, thereby driving the gripper 300 to turn in the specified direction, so that the gripper 300 can adaptively adjust the gripping angle and direction according to the position of the filter, without having to rotate the flexible tube 200 as a whole to adjust the direction of the gripper.

[0042] Because the filter may shift in position within the blood vessel after insertion due to factors such as human movement, insertion location, and filter shape, the end of the filter that should be grasped may become stuck to the vessel wall. When the filter needs to be removed, existing retrieval devices have difficulty effectively grasping it. However, the grasping forceps in this embodiment integrate the opening and closing functions of the gripper 300 and the bending function of the flexible tube 200. By adjusting the bending tube, the angle formed between the gripper 300 and the blood vessel wall can be adjusted to more accurately capture the filter, making it more suitable for doctors' use cases of grasping filters in veins.

[0043] Similarly, the second drive mechanism 140 may include, for example, a fourth connector 142, which is rotatably or movably connected to the front end member 110, as long as the movement of the fourth connector 142 can pull the second traction rope 500.

[0044] Specifically, in this embodiment, one end of the flexible tube 200 is connected to the first connector 310, and the other end is connected to the front end member 110. The handle 100 includes a first drive mechanism 130 and a second drive mechanism 140. The first drive mechanism 130 is used to drive the first traction rope 400 to move, thereby realizing the opening and closing of the gripper 300. Since the front end member 110 is rotatably connected to the rear end member 120, the opening direction of the gripper 300 can be adjusted by rotating between the front end member 110 and the rear end member 120 during use. For example, the first drive mechanism 130 is connected to the front end member 110. When the front end member 110 is rotated, the first drive mechanism 130 can be driven to rotate, and the gripper 300 can be driven to rotate around the axis of the first traction rope 400 through the first traction rope 400, so as to adjust the opening direction of the gripper 300. Alternatively, the first drive mechanism 130 is connected to the rear end member 120. When the rear end member 120 is rotated, it can drive the rear end member 120 to rotate around the axis of the first traction rope 400 via the first traction rope 400, thereby adjusting the opening direction of the gripper 300. The opening direction of the gripper 300 refers to its opening and closing direction. For example, when the gripper 300 needs to grip a vertically extending component, the clamping member 320 can be adjusted to rotate horizontally to achieve the opening and closing position of the gripper 300. Similarly, when a horizontally extending component is needed, the clamping member 320 can be adjusted to rotate vertically to achieve the opening and closing position of the gripper 300, thereby improving the accuracy of the gripper 300 in capturing the target object. Furthermore, the second drive mechanism 140 can drive the second traction rope 500 to move along its own axis, causing the flexible tube 200 to bend. Therefore, the flexible tube 200 can be adapted to the bending direction of the blood vessel to reduce the collision between the gripper 300 and the blood vessel wall in complex vascular environments, thereby reducing the risk of damage to the blood vessel. At the same time, the angle formed between the gripper 300 and the blood vessel wall can be adjusted to more accurately capture the filter.

[0045] In some embodiments, the first connector 310 includes a bending connection portion 311, which is sleeved on the outside of the flexible tube 200 and connected to the flexible tube 200. In the following embodiment, the flexible tube 200 includes a spring tube 250, and the bending connection portion 311 is sleeved on the outside of the spring tube 250 and connected to the spring tube 250. The bending connection portion 311 also includes a sub-connection portion 3111, which is located at a position offset from the axis of the flexible tube 200. Therefore, when the second drive mechanism 140 drives the second traction rope 500 to move, the flexible tube 200 can be bent toward the side of the sub-connection portion 3111, realizing the directional bending of the gripper 300. Specifically, during use, when it is necessary to adjust the rotation position of the gripper 300 or to turn it in a specified direction, the doctor can rotate the flexible tube 200 by rotating the front end 110, thereby rotating the sub-connector 3111 to the side of the bending connection 311 in the specified direction. Finally, the second drive mechanism 140 drives the second traction rope 500 to move and pull the bending connection 311, so that the flexible tube 200 is completely deformed in the specified direction, thereby driving the gripper 300 to turn in the specified direction. This allows for more accurate alignment of the filter in complex vascular environments and reduces the collision between the gripper 300 and the blood vessel wall, thereby reducing the risk of damage to the blood vessel.

[0046] In some embodiments, the first drive mechanism 130 is connected to the rear end member 120, and the first connecting member 310 further includes a mounting portion 312 and a rotating connecting portion 313. The mounting portion 312 is sleeved and fixed to the rotating connecting portion 313, and the clamping member 320 is rotatably connected to the mounting portion 312. The mounting portion 312 is rotatably connected to the bending connecting portion 311 via the rotating connecting portion 313. For example, a receiving groove 314 is formed between the mounting portion 312 and the rotating connecting portion 313, and the bending connecting portion 311 is abutted in the receiving groove 314, so that the mounting portion 312 and the rotating connecting portion 313 can rotate relative to the connecting portion 311. During use, when it is necessary to adjust the opening direction of the gripper 300, the rear end member 120 is rotated, and the clamping member 320 is driven by the first traction rope 400 to rotate along the axis of the first traction rope 400, thereby driving the mounting portion 312 and the rotating connecting portion 313 to rotate, without causing the bending connecting portion 311 to rotate. When the gripper 300 needs to be oriented to turn, the front end part 110 is rotated to drive the bending connection part 311 to rotate. That is, in this embodiment, the adjustment of the opening direction of the gripper 300 and the adjustment of the turning direction are independent of each other and do not interfere with each other, thereby realizing the flexible control of the gripper 300 in complex environments.

[0047] Reference Figure 2 and Figure 4In some embodiments, the flexible tube 200 has a first cavity 230 and a second cavity 240, with the first traction rope 400 located in the first cavity 230 and the second traction rope 500 located in the second cavity 240. That is, in this embodiment, the flexible tube 200 has a double-cavity structure to separate the movement paths of the first traction rope 400 and the second traction rope 500, avoiding mutual contact and friction between them during movement. This prevents interference between the movements of the first traction rope 400 and the second traction rope 500, making the opening and closing and angle adjustment of the gripper 300 more precise and improving the reliability of the equipment.

[0048] Reference Figure 4 In some embodiments, the axis of the first cavity 230 coincides with the axis of the flexible tube 200, while the axis of the second cavity 240 is offset from that of the flexible tube 200. This offset of the second cavity 240 concentrates the torque exerted by the second traction rope 500, thereby improving the bending efficiency of the flexible tube 200. The centrally located design of the first cavity 230 ensures that the force exerted by the first traction rope 400 when driving the gripper 300 to open and close is transmitted along the axis of the flexible tube 200, reducing lateral forces generated during clamping and preventing the gripper 300 from turning during operation, thus making clamping more stable.

[0049] Reference Figure 1 In some embodiments, the flexible tube 200 includes a main body segment 210 and a bending segment 220 connected to each other. One end of the main body segment 210 away from the bending segment 220 is connected to the front end member 110, and one end of the bending segment 220 away from the main body segment 210 is connected to the first connector 310. The length of the bending segment 220 is less than the length of the main body segment 210, and the hardness of the bending segment 220 is less than the hardness of the main body segment 210. For example, the bending section 220 and the main body section 210 are formed using different materials. For instance, the main body section 210 is made of reinforced polyether ether ketone (PEEK) material, which has higher hardness; the bending section 220 is made of ordinary PEEK material, which has lower hardness. Alternatively, as in some embodiments, the main body section 210 has an N-strand stainless steel braided reinforcement structure inside, while the bending section 220 has an M-strand stainless steel braided structure, where N > M. This results in the bending section 220 having a lower hardness than the main body section 210, thus concentrating the bending deformation in the bending section 220 while the main body section 210 maintains good pushing rigidity. This ensures that the doctor can accurately control the bending position to approach the gripper 300, improving bending efficiency and accuracy.

[0050] Reference Figure 3 and Figure 4In some embodiments, the flexible tube 200 includes a spring tube 250 and a protective tube 260 covering the outside of the spring tube 250. The spring tube 250 is, for example, a metal structure precision-wound from stainless steel to give the flexible tube 200 a certain axial rigidity, facilitating its insertion into the blood vessel. The protective tube 260 is, for example, a non-metallic flexible structure injection-molded from medical-grade silicone material, preventing the uneven surface of the spring tube 250 from damaging the inner wall of the blood vessel. Simultaneously, it allows the surface of the protective tube 260 to be smooth and have a certain degree of hydrophilicity, reducing the risk of thrombosis when in contact with blood, while also preventing the spring tube 250 from directly contacting the blood vessel wall and causing scratches. A first lumen 230 and a second lumen 240 are formed within the protective tube 260. The spring tube 250 and the first traction rope 400 are located within the first lumen 230, and the second traction rope 500 is located within the second lumen 240.

[0051] Based on the above embodiments, the spring tube 250 includes a first tube segment located in the main body section 210 and a second tube segment located in the bending section 220. The pitch of the second tube segment is greater than that of the first tube segment. The smaller pitch of the first tube segment ensures that the main body section 210 has sufficient rigidity to push the device. The larger pitch of the second tube segment increases the gap between the spring coils, making it easier to deform under the tension of the traction rope. That is, in this embodiment, different hardness can be achieved by the pitch of the spring tube 250 without using different materials, making the structure of the flexible tube 200 in this embodiment simpler and easier to process, thereby reducing the processing cost of the grasping clamp in this embodiment.

[0052] Reference Figure 3 In some embodiments, the spring tube 250 is connected to the front end member 110. Specifically, the metal spring tube 250 has higher torsional strength than the non-metallic protective tube 260, thereby more efficiently transmitting the rotation of the front end member 110 to the gripper 300 and improving the rotational accuracy of the gripper 300, making it easier to turn the gripper 300 in the specified direction, thus making the gripper of this embodiment simpler to use.

[0053] Reference Figure 3 as well as Figure 5In some embodiments, the front end member 110 includes a first connecting hole 113 extending along a first direction. The inner wall of the first connecting hole 113 includes a first limiting surface 114 and a second limiting surface 117. The first limiting surface 114 is, for example, an annular stepped structure and faces the rear end member 120. The handle 100 also includes a second connector 600. The second connector 600 is, for example, injection molded from high-strength nylon material. The second connector 600 is snapped onto or glued to the spring tube 250. The second connector 600 has a third limiting surface 610 and a fourth limiting surface 620 facing away from the rear end member 120. The third limiting surface 610 is an annular flange that matches the first limiting surface 114 or is the end face of the second connector 600. The second connector 600 is inserted into the first connecting hole 113, and the third limiting surface 610 abuts against the first limiting surface 114 to prevent the flexible tube 200 from moving away from the rear end member 120, thereby preventing the flexible tube 200 from falling off the handle 100. The fourth limiting surface 620 abuts against the second limiting surface 117 to prevent the second connector 600 from rotating relative to the front end member 110. For example, the radial sidewall of the first connecting hole 113 has a groove extending in a first direction, the inner wall of the groove includes the second limiting surface 117, and the outer wall of the second connector 600 is provided with a locking block that matches the groove. After the locking block is inserted into the groove, the locking block fits tightly against the second limiting surface 117 to prevent the second connector 600 from rotating relative to the front end member 110, ensuring a stable connection. For example... Figure 5 As shown, the first connecting hole 113 includes a hexagonal limiting hole 118, and the second connecting member 600 includes a hexagonal limiting post 630. The limiting post 630 is inserted into the limiting hole 118, thereby preventing the second connecting member 600 from rotating.

[0054] Specifically, in this embodiment, through the cooperation between the second connector 600 and the first connecting hole 113, the flexible tube 200 and the front end piece 110 can be connected during the assembly process. The flexible tube 200 can be passed through the first connecting hole 113, and the second connector 600 can be inserted into the first connecting hole 113, thereby completing the stable connection between the flexible tube 200 and the front end piece 110. This makes the assembly of the capture clamp in this embodiment simpler and improves production efficiency.

[0055] Reference Figure 1 and Figure 2In some embodiments, the front end member 110 has a first mounting groove 111 extending along a first direction and a first opening 112 communicating with the first mounting groove 111. The rear end member 120 has a second mounting groove 121 extending along the first direction and a second opening 122 communicating with the second mounting groove 121, the second mounting groove 121 communicating with the first mounting groove 111. The first drive mechanism 130 includes a push block 131 and a third connector 132. The push block 131 has, for example, an anti-slip groove 1311 on its exterior. The push block 131 is fitted onto the exterior of the rear end member 120 and is movable relative to the rear end member 120 in the first direction. The third connector 132 is connected to the inner wall of the push block 131 and extends from the first opening 112 into the second mounting groove 121. A first traction rope 400 passes through the first mounting groove 111 and extends into the second mounting groove 121, connecting to the third connector 132. In use, the doctor can push the push block 131 to move the third connector 132 in the first direction, thereby moving the first traction rope 400 to control the opening and closing degree of the gripper 300. The doctor can also rotate the rear end piece 120 to rotate the third connector 132, so that the first traction rope 400 connected to the third connector 132 rotates synchronously, thereby driving the front gripper 300 to rotate around the axis of the first traction rope 400 and adjusting the orientation of the gripper 300.

[0056] The second drive mechanism 140 includes a knob 141 and a fourth connector 142. The fourth connector 142 has threads on its surface and is movably connected to the inner wall of the second mounting groove 121, and partially extends out of the second mounting groove 121 from the second opening 122. The knob 141 is fitted onto the fourth connector 142 and is screwed into it. The knob 141 is fitted onto the front end 110 and can rotate relative to the front end 110 to drive the fourth connector 142 to move in the first direction, thereby driving the second traction rope 500 to move. Specifically, in this embodiment, the first traction rope 400 is pulled by moving the push block 131 along the first direction, and the second traction rope 500 is pulled by rotating the knob 141 around the knob perpendicular to the first direction. This reduces the mutual interference between the doctor's hands when driving the second traction rope 500 and when driving the first traction rope 400, making the operation of the grasping forceps in this embodiment more flexible and convenient, and effectively improving surgical precision and efficiency.

[0057] Specifically, when using the grasping forceps of this embodiment, the doctor holds one hand on the rear end member 120 to push the push block 131 to control the opening and closing of the gripper 300. The other hand holds the front end member 110 to rotate the knob 141 to adjust the angle of the gripper 300. That is, the doctor's two hands are positioned front and back. If the knob 141 also moves back and forth, space needs to be left between the doctor's hands for the knob 141 to move. However, in this embodiment, the knob 141 rotates. Therefore, even with both hands in contact, the knob 141 can be rotated without requiring extra space. This not only makes the grasping forceps of this embodiment more flexible to operate but also makes the grasping forceps structure more compact, reducing the weight of the grasping forceps, thereby reducing hand fatigue during use and improving the comfort and stability of the surgical procedure.

[0058] Reference Figure 1 Based on the above embodiment, the rear end member 120 further includes a retaining ring 123, which is located at the end of the push block 131 opposite to the front end member 110. Therefore, in use, the doctor's thumb can be inserted through the retaining ring 123, and the index and middle fingers can hold the push block 131. When it is necessary to drive the first traction rope 400, the push block 131 can be moved in the first direction simply by bending the index and middle fingers toward the thumb. This makes the operation of the grasping forceps in this embodiment simpler, reduces the complexity of hand movements, and further improves the efficiency of the surgery.

[0059] Reference Figure 3 In some other embodiments, the knob 141 includes an elastic portion 1411, which is made of, for example, medical-grade silicone. The elastic portion 1411 can be deformed radially under pressure to abut against the fourth connecting member 142. Therefore, to rotate the front end member 110 relative to the rear end member 120, the elastic portion 1411 can be pressed downwards by hand, causing it to abut against the fourth connecting member 311 and lock together. Thus, while pressing downwards on the elastic portion 1411, rotating the knob 141 allows the front end member 110 to rotate relative to the rear end member 120, adjusting the direction of the gripper 300. In this embodiment, the knob 141 not only allows the front end member 110 to rotate but also allows the second traction rope 500 to move, making the gripper of this embodiment simpler and more convenient to use.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, in the description of the present invention, the reference to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An adjustable bending forceps characterized by, include: The handle includes a front end, a rear end, a first drive mechanism, and a second drive mechanism. The rear end is rotatably connected to the front end, and the rotation axis of the rear end extends along a first direction, which is the direction from the front end to the rear end. A flexible tube is connected to the front end component; The gripper includes a first connector and at least two clamping members, the first connector being connected to the end of the flexible tube opposite to the front end member, and the clamping members being movably connected to the first connector; A first traction rope is disposed inside the flexible tube, with one end connected to the first drive mechanism and the other end connected to the gripper. The first drive mechanism can drive the first traction rope to move along its own axis to drive the clamping member to move and adjust the opening and closing degree of the gripper. A second traction rope is disposed inside the flexible tube, with one end connected to the second drive mechanism and the other end connected to the connection part. The second drive mechanism can drive the second traction rope to move along its own axis so that the flexible tube bends.

2. The capture forceps according to claim 1, wherein, The first connector includes a bending adjustment connector, which is sleeved on the flexible tube and connected to the flexible tube. The bending adjustment connector includes a sub-connector, which is located at a position offset from the axis of the flexible tube.

3. The snatchers according to claim 1 or 2, characterized in that, The flexible tube has a first cavity and a second cavity, the first traction rope is located in the first cavity, and the second traction rope is located in the second cavity.

4. The snatchers of claim 3 wherein, The axis of the first cavity is aligned with the axis of the flexible tube, while the axis of the second cavity is offset from the axis of the flexible tube.

5. The snatchers of claim 1 wherein, The flexible tube includes a main body section and a bending section connected to each other. One end of the main body section away from the bending section is connected to the front end member, and one end of the bending section away from the main body section is connected to the first connector. The length of the bending section is less than the length of the main body section, and the hardness of the bending section is less than the hardness of the main body section.

6. The snatchers of claim 5 wherein, The flexible tube includes a spring tube and a protective tube covering the outside of the spring tube. The spring tube is a metal structure, and the protective tube is a non-metallic flexible structure.

7. The snatchers of claim 6 wherein, The spring tube includes a first tube segment located in the main body section and a second tube segment located in the bending section, wherein the pitch of the second tube segment is greater than the pitch of the first tube segment.

8. The snatchers of claim 6 wherein, The front end component includes a first connecting hole extending in a first direction. The inner wall of the first connecting hole includes a first limiting surface and a second limiting surface. The first limiting surface faces the rear end component. The handle also includes a second connecting component connected to the spring tube. The second connecting component has a third limiting surface and a fourth limiting surface facing away from the rear end component. The second connecting component is inserted into the first connecting hole. The third limiting surface abuts against the first limiting surface to prevent the flexible tube from moving away from the rear end component. The fourth limiting surface abuts against the second limiting surface to prevent the flexible tube from rotating relative to the front end component.

9. The snatchers of claim 1 wherein, The front end member has a first mounting groove extending along a first direction and a first opening communicating with the first mounting groove; the rear end member has a second mounting groove extending along a first direction and a second opening communicating with the second mounting groove; the second mounting groove communicates with the first mounting groove. The first driving mechanism includes a push block and a third connecting member. The push block is sleeved on the outside of the rear end member and can move relative to the rear end member in the first direction. The third connecting member is connected to the inner wall of the push block and extends from the first opening into the second mounting groove. The first traction rope passes through the first mounting groove and extends into the second mounting groove and is connected to the third connecting member. The second drive mechanism includes a knob and a fourth connector. The fourth connector is movably connected to the inner wall of the second mounting groove and partially extends out of the second mounting groove from the second opening. The knob is sleeved on the fourth connector and screwed into it. The knob is also sleeved on the front end and can rotate relative to the front end to drive the fourth connector to move in the first direction. The second traction rope is connected to the fourth connector.

10. The snatchers of claim 9 wherein, The knob includes an elastic portion that can be deformed radially under pressure to abut against the fourth connector.

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