Handle and capturing forceps for vascular interventional operation

Abstract

The invention discloses a handle for a vascular interventional operation and capturing forceps. The handle for the vascular interventional operation comprises a shell and a first driving assembly. The shell comprises a handheld part; the first driving assembly comprises a pressing piece, a first rack, a gear transmission mechanism and a second rack, the pressing piece is movably connected to the shell and comprises a pressed part, the pressed part is located on the handheld part and used for being pressed by an operator, the first rack is connected to the pressed part, and the second rack is movably connected to the shell and extends in the first direction; the gear transmission mechanism is connected to the shell and engaged with the first rack and the second rack, and the handle is configured to press the pressed part in the second direction to enable the second rack to move in the first direction so as to drive the opening and closing traction rope to move in the first direction. Therefore, only the handheld part needs to be held tightly, pressing on the pressed part can be achieved, the second rack is made to move so as to adjust opening and closing of the clamping jaw, a doctor does not need to operate with two hands, and using is more convenient and faster.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a vascular interventional surgical handle and a grasping forceps. Background Technology

[0002] In the medical field, grasping forceps can be inserted into blood vessels to retrieve filters located within them. Some techniques involve grasping forceps comprising a handle, a traction rope, and grippers. The handle includes a gripping part and a sliding block. During use, the operator holds the gripping part with one hand and pulls the sliding block with the other, thus opening and closing the grippers. However, this requires the use of both hands, leading to inconvenience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a vascular interventional surgical handle that can be used as a grasping forceps, enabling single-handed operation of the gripper opening and closing, making it more convenient to use.

[0004] The present invention also proposes a grasping forceps having the above-mentioned vascular interventional surgical handle.

[0005] According to a first aspect of the present invention, a handle is used for medical gripping forceps, the gripping forceps including jaws and an opening / closing traction rope connected to the jaws, the handle including: a housing and a first drive assembly.

[0006] The outer casing includes a handheld portion for the operator to grip; the first drive assembly includes a pressing member, a first rack, a gear transmission mechanism, and a second rack. The pressing member is movably connected to the outer casing and includes a pressure-receiving portion located in the handheld portion for the operator to press. The first rack is connected to the pressure-receiving portion, and the second rack is movably connected to the outer casing and extends along a first direction. The gear transmission mechanism is connected to the outer casing and meshes with the first rack and the second rack, respectively. The handle is configured such that pressing the pressure-receiving portion along a second direction causes the second rack to move along the first direction, thereby moving the opening / closing traction rope along the first direction; the second direction is perpendicular to the first direction.

[0007] The vascular interventional surgical handle according to an embodiment of the present invention has at least the following beneficial effects:

[0008] In this embodiment, the handle is for the operator to grip, the pressure-receiving part of the pressing member is located on the handle, the first rack is connected to the pressure-receiving part and is connected to the second rack via a gear transmission mechanism, and the handle in this embodiment is configured such that the pressing part in the second direction can be transmitted to the second rack via the gear transmission mechanism, thereby driving the second rack to move in the first direction. Therefore, when the handle of this embodiment is applied to the grasping forceps, the opening and closing traction rope is connected to the second rack. During use, the doctor can hold the handle and press the pressure-receiving part in the second direction by squeezing the handle, causing the second rack to move in the first direction, thereby driving the opening and closing traction rope to move in the first direction, thus adjusting the opening and closing degree of the grippers, without requiring the doctor to operate with both hands, making it more convenient to use.

[0009] According to some embodiments of the present invention, the first drive assembly further includes a first rotating shaft and a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft both extending along a third direction, the first direction and the second direction both being perpendicular to the third direction, the pressing member being rotatably connected to the housing via the first rotating shaft, the first rack rotating about the first rotating shaft as the center, the first rack having an arc-shaped structure, the gear transmission mechanism including a first gear, the first gear being rotatably connected to the housing via the second rotating shaft, the first gear being located on the side of the second rack away from the first rotating shaft and meshing with the first rack.

[0010] According to some embodiments of the present invention, the gear transmission mechanism further includes a second gear, which is coaxially arranged with the first gear and rotatably connected to the housing via the second rotating shaft. The second rack meshes with the second gear, and the second gear can rotate synchronously with the first gear. The pitch circle radius of the first gear is R1, and the pitch circle radius of the second gear is R2, where R1 > R2.

[0011] According to some embodiments of the present invention, the gear transmission mechanism includes a plurality of first gears with different pitch circle diameters, the plurality of first gears being distributed along the third direction and coaxially arranged, and capable of rotating synchronously; the gear transmission mechanism further includes a second gear, the second gear being coaxially arranged with the first gear and rotatably connected to the housing via a second rotating shaft; the second rack meshing with the second gear; the second gear being capable of rotating synchronously with any of the first gears.

[0012] The pressing member is movable and locked relative to the first gear on the first rotating shaft in the third direction, and the first rotating shaft is movable and locked relative to the housing in the first direction, so that the first rack can selectively mesh with either of the first gears.

[0013] According to some embodiments of the present invention, the housing further includes a mounting cavity and a first opening and a second opening communicating with the mounting cavity. The first rotating shaft and the second rotating shaft are both located inside the mounting cavity. The pressure-bearing part is rotatable about the first rotating shaft and enters and exits the mounting cavity through the first opening. The second rack is movably connected to the inner wall of the mounting cavity. The second opening is used for the opening and closing traction rope to pass through.

[0014] According to some embodiments of the present invention, the housing has a first set position and a second set position in the first direction, the second rack is movable between the first set position and the second set position, and the handle is configured such that: when the second rack is in the first set position, the gripper is in an open state, and when the second rack is in the second set position, the gripper is in a closed state, and the pressure-bearing part is located in the mounting cavity.

[0015] According to some embodiments of the present invention, the second rack includes two sub-racks spaced apart along a third direction, the first gear is located between the two sub-racks, and the gear transmission mechanism further includes two second gears, which are rotatably connected to the housing via the second rotating shaft and are respectively located on both sides of the first gear in the third direction. The two second gears can rotate synchronously with the first gear and mesh with the two sub-racks respectively.

[0016] According to some embodiments of the present invention, the handle further includes an elastic element connected to the first drive assembly for subjecting the second rack to a force opposite to the first direction, so as to reset the second rack.

[0017] According to some embodiments of the present invention, the handle further includes a damping adjustment mechanism, the damping adjustment mechanism including an adjusting member and a first connecting member, the adjusting member extending along a first direction and rotatably connected to the housing, one end of the adjusting member being located outside the housing and the other end being located in the housing mounting cavity, the first connecting member being sleeved on the outside of the adjusting member and screw-fitted with the adjusting member, and the inner wall of the housing having a limiting portion, the first connecting member having a limiting groove extending along the first direction, the limiting portion being slidably engaged in the limiting groove;

[0018] The elastic element is a compression spring. One end of the elastic element is connected to the first connecting member, and the other end is connected to the second rack. It drives the adjusting member to rotate, which enables the first connecting member to reciprocate in a first direction to adjust the initial compression of the elastic element.

[0019] According to some embodiments of the present invention, the handle further includes a second drive assembly, the second drive assembly including a movable member connected to the housing and capable of reciprocating relative to the housing in the first direction;

[0020] The grappling clamp also includes a bending traction rope, one end of which is connected to the movable component and the other end is connected near the gripper, for adjusting the bending position of the gripper.

[0021] According to some embodiments of the present invention, the housing further includes a front end portion connected to the handheld portion and located on the side of the handheld portion opposite to the first direction. The second drive assembly further includes a knob rotatably connected to the housing and located on the side of the handheld portion facing the front end portion. The knob is throttle connected to the moving member for driving the moving member to reciprocate in the first direction. The rotation axis of the knob is parallel to the first direction.

[0022] According to some embodiments of the present invention, the front end is used to connect to the flexible tube of the grasping clamp, one end of the flexible tube opposite to the front end is connected to the gripper, the hand grip is rotatably connected to the front end, the knob is located at the front end, the handle further includes a toggle switch, one end of the toggle switch is connected to the front end and is located on the side of the knob facing the front end, and the other end of the toggle switch is a movable part and is exposed outside the housing.

[0023] According to a second aspect of the present invention, the grasping forceps include a flexible tube, grippers, an opening and closing traction rope, and the vascular interventional surgical handle described in the first aspect embodiment.

[0024] The flexible tube is connected to the handle; the gripper includes a second connector and a clamping member, the clamping member is movably connected to the second connector, and the second connector is connected to the end of the flexible tube opposite to the handle; the opening and closing traction rope is located inside the flexible tube, one end is connected to the second rack, and the other end is driven to the clamping member, for driving the clamping member to move, so as to adjust the opening and closing of the gripper.

[0025] The grappling pincers according to embodiments of the present invention have at least the following beneficial effects:

[0026] The handle of the first embodiment includes a handheld portion for the operator's hand to grip. A pressure-receiving portion of the pressing member is located on the handheld portion. A first rack is connected to the pressure-receiving portion and is driven by a gear transmission mechanism to a second rack. In this embodiment, the handle is configured such that the pressing portion in the second direction can be transmitted to the second rack via the gear transmission mechanism, thereby causing the second rack to move in the first direction. Therefore, during use, the doctor can hold the handle and, by gripping the handheld portion, press the pressure-receiving portion in the second direction with their palm, causing the second rack to move in the first direction, thereby moving the opening and closing traction rope in the first direction and adjusting the opening and closing degree of the gripper. This eliminates the need for the doctor to operate with both hands, making it more convenient to use.

[0027] According to some embodiments of the present invention, the handle further includes a second drive assembly, the second drive assembly including a movable member connected to the housing and capable of reciprocating relative to the housing in the first direction;

[0028] The grappling clamp also includes a bending traction rope, one end of which is connected to the movable component and the other end is connected near the gripper, for adjusting the bending position of the gripper.

[0029] The flexible tube has a first cavity and a second cavity, the opening and closing traction rope is located in the first cavity, and the bending traction rope is located in the second cavity.

[0030] Additional aspects and advantages of the 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

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 This is a schematic diagram of the handle according to a first aspect embodiment of the present invention;

[0033] Figure 2 for Figure 1 Middle section view;

[0034] Figure 3 for Figure 2 A schematic diagram of the structure of the first drive component;

[0035] Figure 4 This is a schematic diagram of another handle structure according to the first aspect of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the capturing pincers according to a second aspect embodiment of the present invention;

[0037] Figure 6 for Figure 5 A sectional view of the middle section of the structure;

[0038] Figure 7 for Figure 5 Partial sectional view.

[0039] Figure label:

[0040] The outer casing 100, the hand grip 110, the mounting cavity 111, the first opening 112, the second opening 113, the front end 120, and the toggle switch 130;

[0041] First drive assembly 200, pressing member 210, pressing part 211, first rack 220, gear transmission mechanism 230, first gear 231, second gear 232, second rack 240, sub-rack 241, first rotating shaft 250, second rotating shaft 260, third connecting member 270;

[0042] Second drive assembly 300, knob 320, moving part 310;

[0043] Elastic element 400;

[0044] Damping adjustment mechanism 500, adjusting component 510, first connecting component 520;

[0045] Flexible tube 600, main body section 601, bending section 602, first cavity 610, second cavity 620;

[0046] Gripper 700, second connector 710, clamping member 720;

[0047] The opening and closing traction rope is 800mm, and the bending traction rope is 900mm. Detailed Implementation

[0048] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0049] In the description of this invention, 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 invention 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 limiting this invention.

[0050] In the description of this invention, "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.

[0051] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0052] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] In the medical field, grasping forceps can be inserted into blood vessels to retrieve filters located within them. Some techniques involve grasping forceps comprising a handle, a traction rope, and grippers. The handle includes a gripping part and a sliding block. During use, one hand holds the gripping part while the other pulls the sliding block, thus opening and closing the grippers. However, this requires both hands to operate, leading to inconvenience.

[0054] In view of the above background, the first aspect of the present invention provides a handle that can be used for medical grasping forceps, making it more convenient to use.

[0055] Reference Figures 1 to 7 According to a first aspect of the present invention, a handle is used for medical grasping forceps. The grasping forceps include grippers 700, an opening and closing traction rope 800, and a flexible tube 600. The grippers 700 are connected to one end of the flexible tube 600, and the opening and closing traction rope 800 is located inside the flexible tube 600 and connected to the grippers 700 (e.g., ...). Figures 5 to 7 As shown, the handle includes: a housing 100 and a first drive assembly 200.

[0056] The outer shell 100 is made of medical-grade materials such as ABS, polyvinyl chloride (PVC), polyethylene (PE), or polycarbonate (PC). The surface of the outer shell 100 may also be frosted to enhance grip friction. The outer shell 100 includes a handle 110 and a front end 120. The handle 110 is for the operator to grip and may have a corrugated arc structure to conform to the natural gripping posture of the palm. The front end 120 is used to connect the flexible tube 600 of the grasping forceps (e.g., Figure 5 (As shown). For example, the front end 120 has a plug hole for inserting the flexible tube 600, or the inner wall of the plug hole is provided with an internal thread for threaded connection to the end of the flexible tube 600 opposite to the gripper 700.

[0057] The first drive assembly 200 includes a pressing member 210, a first rack 220, a gear transmission mechanism 230, and a second rack 240 (e.g., Figure 2 and Figure 3 As shown, the pressing member 210 is movably connected to the housing 100. The pressing member 210 includes a pressing part 211 located in the handheld part 110 for pressing by the operator. A first rack 220 is connected to the pressing part 211, and a second rack 240 is movably connected to the housing 100 and extends along a first direction. A gear transmission mechanism 230 is connected to the housing 100 and meshes with the first rack 220 and the second rack 240 respectively. The handle is configured such that pressing the pressing part 211 along a second direction (the second direction is perpendicular to the first direction) can move the second rack 240 along the first direction to drive the opening and closing traction rope 800 to move along the first direction to adjust the opening and closing degree of the gripper 700 (the traction rope driving the gripper 700 to open and close is a common structure in the present, and will not be described in detail here).

[0058] For example, the pressing member 210 is movably connected to the housing 100 and is movable relative to each other in the second direction. The first rack 220 is a straight rack and extends in the second direction. The gear transmission mechanism 230 includes a first gear 231, the axis of which extends in a third direction (both the first and second directions are perpendicular to the third direction). The second rack 240 meshes with the first gear 231. When the second rack 240 directly meshes with the first gear 231, the first rack 220 and the second rack 240 are located at different positions in the third direction. The width of the first gear 231 extends in the third direction to achieve meshing with the first rack 220 and the second rack 240 respectively. For example, the first gear 231 is in the third direction. The left side of the gear 230 meshes with the first rack 220, and the right side meshes with the second rack 240. Thus, when the first rack 220 drives the first gear 231 to rotate, causing the second rack 240 to move in the first direction, the first rack 220 and the second rack 240 are staggered and will not interfere with each other. Alternatively, the gear transmission mechanism 230 may also include a second gear 232, which is coaxially and fixedly connected to the first gear 231. When the pressure receiving part 211 is pressed downward (for ease of description, unless otherwise specified, pressing in the second direction will be described as pressing downward below), the first rack 220 moves downward synchronously and drives the first gear 231 to rotate, thereby causing the second rack 240 to move in the first direction.

[0059] Alternatively, in some embodiments, the first drive assembly 200 may further include a first rotating shaft 250 and a second rotating shaft 260 (e.g., Figure 2As shown, the axes of the first rotating shaft 250 and the second rotating shaft 260 both extend along a third direction. Both the first and second directions are perpendicular to the third direction. The pressing member 210 is rotatably connected to the outer casing 100 via the first rotating shaft 250. The first rack 220 rotates around the first rotating shaft 250 and has an arc-shaped structure. The gear transmission mechanism 230 includes a first gear 231, which is rotatably connected to the outer casing 100 via the second rotating shaft 260. The first gear 231 is located on the side of the second rack 240 away from the first rotating shaft 250 and meshes with the first rack 220. It can be understood that the arc of the first rack 220 matches the outer contour of the meshing first gear 231. Therefore, when the doctor presses down on the pressure-bearing part 211, the first rack 220 rotates around the first rotating shaft 250 to drive the first gear 231 to rotate, thereby causing the second rack 240 to move along the first direction. It is understandable that, given the same dimensions in the second direction, the first gear 231 is driven by the arc-shaped first rack 220 rotating around the first pivot 250. Compared to the linear arrangement of the first rack 220 moving in the second direction, this allows for a greater stroke, thus providing a longer travel distance for the opening and closing traction rope 800. In other words, the handle of this embodiment can achieve the same degree of opening and closing adjustment with a smaller size, thereby reducing the weight of the handle and improving the comfort of doctors holding it for extended periods.

[0060] Specifically, in the above embodiment, the handheld part 110 is used for the operator's hand to hold, the pressure-receiving part 211 of the pressing member 210 is located on the handheld part 110, the first rack 220 is connected to the pressure-receiving part 211, and is driven to the second rack 240 through the gear transmission mechanism 230. In this embodiment, the handle is configured such that pressing the pressure-receiving part 211 in the second direction can transmit the force to the second rack 240 through the gear transmission mechanism 230, thereby causing the second rack 240 to move in the first direction. Therefore, when the handle of this embodiment is applied to the grasping clamp, the opening and closing traction rope 800 is connected to the second rack 240. During use, the doctor can hold the handheld part 110 and press the pressure-receiving part 211 in the second direction with four fingers by gripping the handheld part 110, causing the second rack 240 to move in the first direction, thereby driving the opening and closing traction rope 800 to move in the first direction, thus adjusting the opening and closing degree of the gripper 700 without requiring the doctor to operate with both hands, making it more convenient to use.

[0061] Reference Figure 3In some embodiments, the gear transmission mechanism 230 further includes a second gear 232, which is coaxially arranged with the first gear 231 and rotatably connected to the housing 100 via a second rotating shaft 260. A second rack 240 meshes with the second gear 232, and the second gear 232 can rotate synchronously with the first gear 231. The pitch circle radius of the first gear 231 is R1, and the pitch circle radius of the second gear 232 is R2, where R1 > R2. Specifically, the first gear 231 and the second gear 232 are coaxially arranged and can rotate coaxially with the first gear 231. For example, the first gear 231 and the second gear 232 are connected as a single structure, or the first gear 231 and the second gear 232 are fixed on the same shaft by a key connection, etc., to ensure synchronous rotation. When the first rack 220 drives the first gear 231 to rotate, the second gear 232 also rotates accordingly. That is, during the downward pressing of the pressure-receiving part 211, the number of rotations of the first gear 231 is equal to the number of rotations of the second gear 232. Assuming that both the first gear 231 and the second gear 232 rotate n times during the downward pressing of the pressure-receiving part 211, the travel distance of the first rack 220 is S1 = 2πnR1, and the travel distance of the second rack 240 is S2 = 2πnR2. Since R1 > R2, S1 > S2. That is, during use, the travel distance of the second rack 240 is less than the travel distance of the first gear 231, achieving a "deceleration" effect. This avoids the rapid opening and closing of the gripper 700 during operation, allowing for more precise control of the opening and closing degree of the gripper 700, which is beneficial for use in narrow environments such as blood vessels. At the same time, it can prevent sudden large-scale movement of the gripper 700 due to slight changes in pressure during the doctor's use, ensuring the stability and safety of the operation.

[0062] Furthermore, in some other embodiments, the gear transmission mechanism 230 includes a plurality of first gears 231 with different pitch circle diameters. The plurality of first gears 231 are distributed along a third direction and coaxially arranged, that is, the plurality of first gears 231 are connected to the second rotating shaft 260 and arranged side by side in the third direction, and can rotate synchronously. The gear transmission mechanism 230 also includes a second gear 232, which is coaxially arranged with the first gears 231 and rotatably connected to the housing 100 through the second rotating shaft 260. The second rack 240 meshes with the second gear 232, and the second gear 232 can rotate synchronously with any of the first gears 231. The pressing member 210 can move and lock relative to the first gears 231 along a third direction on the first rotating shaft 250, and the first rotating shaft 250 can move and lock relative to the housing 100 in a first direction, so that the first rack 220 can selectively mesh with any of the first gears 231. To ensure sufficient movement space for the pressing member 210 in the third direction, the length of the first rotating shaft 250 is greater than the width of the pressing member 210, allowing the pressing member 210 to slide on the first rotating shaft 250. The specific sliding distance can be adjusted according to the width of the first gear 231. Furthermore, to enable the first rotating shaft 250 to move relative to the outer casing 100 along the first direction, an elongated mounting hole can be provided on the outer casing 100 along the first direction. The first rotating shaft 250 passes through this elongated mounting hole. The mounting height of the first rotating shaft 250 in the mounting hole can be selectively set to change the different positions of the pressing member 210 on the outer casing 100 along the first direction. The aforementioned locking method can utilize existing common locking structures, such as a latching structure with protrusions and grooves between the pressing member 210 and the first rotating shaft 250, or between the first rotating shaft 250 and the outer casing 100. Therefore, doctors can adjust the engagement of the first rack 220 with different sized first gears 231 according to their own usage habits and environment, thereby adjusting the sensitivity of the opening and closing of the gripper 700 and improving the practicality of the grasping clamp.

[0063] Reference Figure 2 In some embodiments, the outer casing 100 further includes a mounting cavity 111 and a first opening 112 and a second opening 113 communicating with the mounting cavity 111. The first rotating shaft 250 and the second rotating shaft 260 are both located within the mounting cavity 111. The pressure-bearing part 211 can rotate around the first rotating shaft 250 and enter and exit the mounting cavity 111 through the first opening 112. The second rack 240 is movably connected to the inner wall of the mounting cavity 111, and the second opening 113 is used for the opening and closing traction rope 800 to pass through. Specifically, in this embodiment, the second rack 240 and the gear transmission mechanism 230 are located within the mounting cavity 111, which not only makes the surface of the handle cleaner and flatter, facilitating the doctor's grip and operation, but also makes the handle more aesthetically pleasing.

[0064] Reference Figure 6In some embodiments, the outer casing 100 has a first set position and a second set position in a first direction. The second rack 240 is movable between the first set position and the second set position. The handle is configured such that when the second rack 240 is in the first set position, the gripper 700 is in an open state; when the second rack 240 is in the second set position, the gripper 700 is in a closed state, and the pressure-receiving part 211 is located within the mounting cavity 111. In this embodiment, the second set position is closer to the bottom of the outer casing 100 than the first set position. Specifically, it is understood that, therefore, during use, when inserting the gripper 700 into a blood vessel, in order to avoid damage to the blood vessel by the gripper 700, the doctor will usually press down on the pressure-receiving part 211 to close the gripper 700. In this embodiment, when the gripper 700 is in the closed state, the pressure-bearing part 211 is located inside the mounting cavity 111, that is, the pressure-bearing part 211 will not form a protrusion on the outside of the housing 100, and after clamping the target object (such as a filter, or diseased tissue, or other implants), only a small protrusion will be formed, so that the doctor can be more comfortable when holding the hand grip 110.

[0065] Reference Figure 3 In some embodiments, the second rack 240 includes two sub-racks 241 spaced apart along a third direction, and the first gear 231 is located between the two sub-racks 241. The gear transmission mechanism 230 also includes two second gears 232, which are rotatably connected to the housing 100 via a second rotating shaft 260 and are respectively located on both sides of the first gear 231 in the third direction. The two second gears 232 can rotate synchronously with the first gear 231 and mesh with the two sub-racks 241 respectively. Specifically, in this embodiment, the first gear 231 is located between the two second gears 232. Therefore, during the process of driving the first gear 231 to rotate through the first rack 220, the force on both ends of the first rotation axis can be more even, avoiding wear caused by excessive force at a single point, extending the service life of the equipment, and ensuring the stability and accuracy of the opening and closing of the gripper 700.

[0066] Reference Figure 2In some embodiments, the handle further includes an elastic element 400, which is an elastic structure such as a compression spring, tension spring, or torsion spring. The elastic element 400 is connected to the first drive assembly 200 and is used to apply a force to the second rack 240 opposite to the first direction, so as to reset the second rack 240. Exemplarily, the elastic element 400 is a torsion spring, which is sleeved on the first rotating shaft 250, with one end connected to the pressing member 210 and the other end connected to the housing 100. Alternatively, the elastic element 400 is an elastic structure such as a tension spring, compression spring, or elastic cord, which extends along the first direction, with one end connected to the second rack 240 and the other end connected to the housing 100, and is used to apply a force to the second rack 240 opposite to the first direction. Specifically, when the doctor presses down on the pressure-bearing part 211, the elastic element 400 deforms and stores energy. When the doctor releases the pressure-bearing part 211, the second rack 240 automatically resets under the elastic force of the elastic element 400, thereby improving the ease of use of the grasping forceps.

[0067] It should be noted that the phrase "causing the second rack 240 to be subjected to a force opposite to the first direction" mentioned above should not be interpreted solely as the force directly applied to the second rack 240 by the elastic element 400. It could also be, for example, the force applied by a torsion spring to the pressing element 210, and transmitted to the second rack 240 through the first rack 220 and the gear transmission mechanism 230; that is, the elastic element 400 indirectly applies force to the second rack 240. Furthermore, the elastic element 400 can be directly connected to the second rack 240, or it can be indirectly connected to the second gear 232, to... Figure 2 As shown in the example, the first drive assembly 200 also includes a third connector 270. The second rack 240 is connected to the third connector 270 by welding or screw connection, or the second rack 240 and the third connector 270 are an integral structure, and the elastic element 400 is connected to the third connector 270.

[0068] Reference Figure 4In some embodiments, the handle further includes a damping adjustment mechanism 500, which includes an adjusting member 510 and a first connecting member 520. The adjusting member 510 extends along a first direction and is rotatably connected to the housing 100. One end of the adjusting member 510 is located outside the housing 100, and the other end is located in the mounting cavity 111 of the housing 100. The first connecting member 520 is sleeved on the outside of the adjusting member 510 and is screwed into the adjusting member 510. The inner wall of the housing 100 has a limiting portion, and the first connecting member 520 has a limiting groove that extends along the first direction. The limiting portion is slidably engaged in the limiting groove. The elastic element 400 is a compression spring. One end of the elastic element 400 is connected to the first connecting member 520, and the other end is connected to the second rack 240. Driving the adjusting member 510 to rotate allows the first connecting member 520 to reciprocate in a first direction. This reciprocating movement in the first direction means that the first connecting member 520 can reciprocate relative to the outer shell 100 in both the first and opposite directions, thereby adjusting the initial compression of the elastic element 400 to achieve different levels of damping force. For example, a doctor who prefers a high level of damping can rotate the adjusting member 510 to drive the first connecting member 520 towards the second rack 240, thereby increasing the compression of the elastic element 400 and its initial elastic force. A doctor who prefers a low level of damping can reduce the initial compression through the damping adjustment mechanism 500 to reduce the initial elastic force of the elastic element 400, flexibly adjusting the operating feel to meet the doctor's different damping needs and improve the operational comfort and applicability of this embodiment.

[0069] Reference Figure 6In some embodiments, the handle further includes a second drive assembly 300, which includes a movable member 310 connected to the housing 100 and capable of reciprocating relative to the housing 100 in a first direction. The gripper also includes a bending traction rope 900 located within the flexible tube 600. One end of the bending traction rope 900 is connected to an end of the flexible tube 600 opposite to the front end portion 120, or one end of the bending traction rope 900 is connected to an off-axis position of the second connector 710. Specifically, taking the bending traction rope 900 connected to the second connector 710 as an example, the bending traction rope 900 is welded to the second connector 710. Due to the deformability of the flexible tube 600, when the bending traction rope 900 applies tension to the second connector 710, the flexible tube 600 can bend and deform, thereby causing the gripper 700 to turn in a specified direction, thus facilitating the movement of the gripper 700 within complex blood vessels. It should be noted that the reason the bending traction rope 900 is connected to the second connector 710 off-axis is so that during the process, the gripper 700 bends towards the side connected to the bending traction rope 900, thereby achieving directional bending of the gripper 700. For example, when it is necessary to turn the gripper 700 to the left, the flexible tube 600 is rotated by rotating the handle, which in turn drives the gripper 700 to rotate, thus adjusting the bending traction rope 900 to a position slightly to the left of the second connector 710. When the bending traction rope 900 applies tension to the second connector 710, the gripper 700 turns to the left. Similarly, when a right turn is required, the bending traction rope 900 is adjusted to a position slightly to the right of the second connector 710.

[0070] Reference Figure 6 In some embodiments, the housing 100 further includes a front end portion 120 connected to the handheld portion and located on the side of the handheld portion opposite to the first direction. The second drive assembly 300 includes a knob 320 rotatably connected to the housing 100 and located on the side of the handheld portion 110 facing the front end portion 120. A moving member 310 is throttle-connected to the knob 320 for driving the moving member 310 to reciprocate in the first direction. The rotation axis of the knob 320 is parallel to the first direction. Exemplarily, the housing 100 has a groove extending along the first direction, and the moving member 310 has a sliding portion slidably disposed within the groove. The surface of the moving member 310 has a thread arranged around the first direction, and the knob 320 has a threaded hole arranged along the first direction. The knob 320 is sleeved on the outside of the moving member 310 and screw-fitted with the moving member 310, thereby enabling the moving member 310 to move in the first direction when the knob 320 is rotated.

[0071] Specifically, the knob 320 is located on the side of the handheld part 110 facing the front end 120. For example, if the knob 320 is located at the front end 120, when in use, the handheld part 110 is held in the palm, and the position of the hand is adjusted so that the pressure part 211 is approximately at the four fingers, and the knob 320 is at the thumb. Therefore, during use, the doctor can drive the knob 320 to rotate by swinging the thumb left and right, thereby moving the moving part 310, without having to move the thumb back and forth. Thus, when the doctor drives the knob 320 to rotate by using the thumb, it will not affect the pressure of the palm on the pressure part 211, realizing the simultaneous manipulation of the opening and closing of the gripper 700 and the bending of the flexible tube 600 to move the gripper 700 to the target position, thereby improving the stability of the gripper clamping the filter. Specifically, it is known that when the hand is in the holding state, if the thumb is moved back and forth, the thumb will bend at the joint and cause the palm to arch. Therefore, in order to avoid the palm arching and the four fingers affecting the pressure on the pressure part 211, the rotation axis of the knob 320 in this embodiment is perpendicular to the first direction, so that the doctor can drive the knob 320 to rotate by swinging the thumb left and right without causing the palm to arch, thereby ensuring the pressure effect of the four fingers on the pressure part 211.

[0072] Therefore, when operating the grasping forceps of this embodiment, the doctor can press the pressure part 211 and rotate the knob 320 with one hand. That is, the opening and closing of the grasping claws 700 and the bending of the flexible tube 600 are achieved by one-handed control, making the use of the grasping forceps simpler. Because after the filter is inserted into the blood vessel, its position in the blood vessel may shift due to factors such as human movement, intervention location, and filter shape, causing the end of the filter that should be grasped to stick to the wall. When it is necessary to remove the filter, existing retrieval devices have difficulty effectively grasping the filter. However, the grasping forceps of this embodiment integrate the functions of opening and closing the claws 700 and bending the flexible tube 600. By bending the tube, the angle formed by the claws 700 relative to the blood vessel wall can be adjusted to capture the filter more accurately, which is more suitable for doctors' use scenarios of grasping filters in veins.

[0073] It can be seen that the operator's hand is in a clenched position, with the index finger positioned between the tip of the thumb and the palm. Based on this, refer to... Figure 6In some embodiments, the front end 120 is used to connect to the flexible tube 600 of the grasping forceps. The end of the flexible tube 600 facing away from the front end 120 is connected to the gripper 700. The handle 110 is rotatably connected to the front end 120. The knob 320 is located at the front end 120. The handle also includes a toggle switch 130. One end of the toggle switch 130 is threaded to the front end 120 and is located on the side of the knob 320 facing the front end 120. The other end of the toggle switch 130 is a movable part and is located and exposed outside the housing 100. That is, the toggle switch 130 and the pressure-receiving part 211 are located on both sides of the handle. Therefore, when the doctor holds the handle 110, he can adjust the position of his hand so that the palm is approximately located on the pressure-receiving part 211, the tip of the thumb contacts the knob 320 for rotating the knob 320, and the index finger contacts the toggle switch 130. When it is necessary to press the pressure-receiving part 211, the doctor can simply grip the handle 110. When it is necessary to adjust the orientation of the gripper 700, first turn the knob 320 with your thumb to bend the flexible tube 600 to adjust the angle of the gripper 700. Then, turn the toggle knob 130 with your index finger to rotate the front end 120 relative to the hand part 110, thereby driving the flexible tube 600 to rotate, which in turn drives the gripper 700 to rotate, so as to adjust the specific orientation of the gripper 700.

[0074] Reference Figures 5 to 7 According to a second aspect of the present invention, the grappling clamp includes a flexible tube 600, a gripper 700, an opening and closing traction rope 800, and a handle according to a first aspect of the present invention.

[0075] The flexible tube 600 has, for example, a three-layer composite structure: an inner PTFE lubricating layer, a middle stainless steel braided mesh, and an outer medical-grade PU material. The gripper 700 includes a second connector 710 and a clamping member 720. For example, the gripper 700 includes two clamping members 720 arranged crosswise, with the clamping member 720 rotatably connected to the second connector 710. The opening and closing of the gripper 700 is achieved by rotating the gripper 700. The second connector 710 is connected to the end of the flexible tube 600 opposite to the front end 120. The opening and closing traction rope 800 is, for example, a steel wire rope. One end of the opening and closing traction rope 800 is connected to the second rack 240, and the other end is drive-connected to the clamping member 720. The opening and closing of the gripper 700 is achieved by pulling the opening and closing traction rope 800, causing the clamping member 720 to rotate. It should be noted that the gripper 700 is a common existing structure; the specific transmission structure is not described in detail.

[0076] Specifically, this embodiment uses the handle from the first aspect embodiment. The handle includes a handheld portion 110 for the operator to grip. The pressure-receiving portion 211 of the pressing member 210 is located on the handheld portion 110. A first rack 220 is connected to the pressure-receiving portion 211 and is connected to a second rack 240 via a gear transmission mechanism 230. In this embodiment, the handle is configured such that pressing the pressure-receiving portion 211 in a second direction can transmit the force to the second rack 240 via the gear transmission mechanism 230, thereby causing the second rack 240 to move in a first direction. Therefore, during use, the doctor can hold the handle 110 and press the pressure-receiving portion 211 in a second direction by gripping the handle 110, causing the second rack 240 to move in a first direction, thereby moving the opening and closing traction rope 800 in a first direction and adjusting the opening and closing degree of the gripper 700 without requiring the doctor to operate with both hands, making it more convenient to use.

[0077] Reference Figure 6 and Figure 7 In some embodiments, the handle further includes a second drive assembly 300, which includes a movable element 310 connected to the housing 100 and capable of reciprocating relative to the housing 100 in a first direction. The grasping clamp also includes a bending traction rope 900 located within the flexible tube 600. One end of the bending traction rope 900 is connected to an end of the flexible tube 600 opposite to the front end portion 120, or one end of the bending traction rope 900 is connected to an off-axis position of the second connector 710. The flexible tube 600 has a first cavity 610 and a second cavity 620, with an opening / closing traction rope 800 located within the first cavity 610 and the bending traction rope 900 located within the second cavity 620. That is, in this embodiment, the opening and closing traction rope 800 and the bending traction rope 900 are located in two independent cavities, which avoids mutual contact and friction between the opening and closing traction rope 800 and the bending traction rope 900 during the movement process, thereby avoiding mutual interference between the movement of the opening and closing traction rope 800 and the bending traction rope 900, making the control of the opening and closing and angle adjustment of the gripper 700 more precise and improving the reliability of the equipment.

[0078] Reference Figure 5In some embodiments, the flexible tube 600 includes a main body segment 601 and a bending segment 602 connected to each other. One end of the main body segment 601 facing away from the bending segment 602 is connected to the front end 120, and the other end of the bending segment 602 facing away from the main body segment 601 is connected to a connector. The length of the bending segment 602 is less than the length of the main body segment 601, and the hardness of the bending segment 602 is less than the hardness of the main body segment 601. For example, the bending segment 602 and the main body segment 601 are formed by processing different materials. Alternatively, as in some embodiments, the main body segment 601 is internally reinforced with an N-strand stainless steel braided structure, and the bending segment 602 is internally reinforced with an M-strand stainless steel braided structure, where N > M. This results in the bending segment 602 having a lower hardness than the main body segment 601, thereby concentrating the bending deformation in the bending segment 602 while the main body segment 601 maintains good pushing rigidity. This ensures that the doctor can accurately control the bending position to approach the gripper 700, improving bending efficiency and accuracy.

[0079] 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, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A handpiece for vascular interventional surgery, characterized in that, A medical-grade grasping clamp, the grasping clamp comprising grippers and an opening / closing traction rope connected to the grippers, the handle comprising: The housing includes a hand grip for an operator to hold; The first drive assembly includes a pressing member, a first rack, a gear transmission mechanism, and a second rack. The pressing member is movably connected to the housing and includes a pressure-receiving portion located at the handgrip for pressing by the operator. The first rack is connected to the pressure-receiving portion, and the second rack is movably connected to the housing and extends along a first direction. The gear transmission mechanism is connected to the housing and meshes with the first rack and the second rack, respectively. The handle is configured such that pressing the pressure-receiving portion along a second direction causes the second rack to move along the first direction, thereby driving the opening / closing traction rope to move along the first direction. The second direction is perpendicular to the first direction.

2. The handle according to claim 1, characterized in that, The first drive assembly further includes a first rotating shaft and a second rotating shaft, the axes of which both extend along a third direction. The first direction and the second direction are both perpendicular to the third direction. The pressing member is rotatably connected to the housing via the first rotating shaft. The first rack rotates around the first rotating shaft and has an arc-shaped structure. The gear transmission mechanism includes a first gear, which is rotatably connected to the housing via the second rotating shaft. The first gear is located on the side of the second rack away from the first rotating shaft and meshes with the first rack.

3. The handle according to claim 2, characterized in that, The gear transmission mechanism further includes a second gear, which is coaxially arranged with the first gear and rotatably connected to the housing via the second rotating shaft. The second rack meshes with the second gear, and the second gear can rotate synchronously with the first gear. The pitch circle radius of the first gear is R1, and the pitch circle radius of the second gear is R2, where R1 > R2.

4. The handle according to claim 2, characterized in that, The gear transmission mechanism includes multiple first gears with different pitch circle diameters. The multiple first gears are distributed along the third direction and coaxially arranged, and can rotate synchronously. The gear transmission mechanism also includes a second gear, which is coaxially arranged with the first gear and rotatably connected to the housing through the second rotating shaft. The second rack meshes with the second gear, and the second gear can rotate synchronously with any of the first gears. The pressing member is movable and locked relative to the first gear on the first rotating shaft in the third direction, and the first rotating shaft is movable and locked relative to the housing in the first direction, so that the first rack can selectively mesh with either of the first gears.

5. The handle according to claim 2, characterized in that, The housing also includes a mounting cavity and a first opening and a second opening communicating with the mounting cavity. The first rotating shaft and the second rotating shaft are both located inside the mounting cavity. The pressure-bearing part can rotate around the first rotating shaft and enter and exit the mounting cavity through the first opening. The second rack is movably connected to the inner wall of the mounting cavity. The second opening is used for the opening and closing traction rope to pass through.

6. The handle according to claim 5, characterized in that, The housing has a first set position and a second set position in the first direction. The second rack is movable between the first set position and the second set position. The handle is configured such that when the second rack is in the first set position, the gripper is in an open state, and when the second rack is in the second set position, the gripper is in a closed state, and the pressure-bearing part is located in the mounting cavity.

7. The handle according to claim 5, characterized in that, The second rack includes two sub-racks spaced apart along a third direction. The first gear is located between the two sub-racks. The gear transmission mechanism also includes two second gears. The two second gears are rotatably connected to the housing via the second rotating shaft and are located on both sides of the first gear in the third direction. The two second gears can rotate synchronously with the first gear and mesh with the two sub-racks respectively.

8. The handle according to claim 5, characterized in that, The handle also includes an elastic element connected to the first drive assembly, which is used to subject the second rack to a force opposite to the first direction, so as to reset the second rack.

9. The handle according to claim 8, characterized in that, The handle further includes a damping adjustment mechanism, which includes an adjusting member and a first connecting member. The adjusting member extends along a first direction and is rotatably connected to the housing. One end of the adjusting member is located outside the housing, and the other end is located in the housing mounting cavity. The first connecting member is sleeved on the outside of the adjusting member and screwed into the adjusting member. The inner wall of the housing has a limiting portion, and the first connecting member has a limiting groove. The limiting groove extends along the first direction, and the limiting portion is slidably engaged in the limiting groove. The elastic element is a compression spring. One end of the elastic element is connected to the first connecting member, and the other end is connected to the second rack. It drives the adjusting member to rotate, which enables the first connecting member to reciprocate in a first direction to adjust the initial compression of the elastic element.

10. The handle according to claim 1, characterized in that, The handle further includes a second drive assembly, which includes a movable element connected to the housing and capable of reciprocating relative to the housing in the first direction; The grappling clamp also includes a bending traction rope, one end of which is connected to the movable component and the other end is connected near the gripper, for adjusting the bending position of the gripper.

11. The handle according to claim 10, characterized in that, The housing further includes a front end portion connected to the handheld portion and located on the side of the handheld portion opposite to the first direction. The second drive assembly further includes a knob rotatably connected to the housing and located on the side of the handheld portion facing the front end portion. The knob is drively connected to the moving member for driving the moving member to reciprocate in the first direction. The rotation axis of the knob is parallel to the first direction.

12. The handle according to claim 11, characterized in that, The front end is used to connect to the flexible tube of the grasping clamp. One end of the flexible tube opposite to the front end is connected to the gripper. The handheld part is rotatably connected to the front end. The knob is located at the front end. The handle also includes a toggle switch. One end of the toggle switch is connected to the front end and is located on the side of the knob facing the front end. The other end of the toggle switch is a movable part and is exposed outside the housing.

13. A grasping clamp, characterized in that, include: Handle for vascular interventional surgery as described in any one of claims 1 to 12; A flexible tube is connected to the handle; The gripper includes a second connector and a clamping member, the clamping member being movably connected to the second connector, the second connector being connected to the end of the flexible tube opposite to the handle. The opening and closing traction rope is located inside the flexible tube, with one end connected to the second rack and the other end connected to the clamping member. It is used to drive the clamping member to move and adjust the opening and closing of the gripper.

14. The grasping clamp according to claim 13, characterized in that, The handle further includes a second drive assembly, which includes a movable element connected to the housing and capable of reciprocating relative to the housing in the first direction; The grappling clamp also includes a bending traction rope, one end of which is connected to the movable component and the other end is connected near the gripper, for adjusting the bending position of the gripper. The flexible tube has a first cavity and a second cavity, the opening and closing traction rope is located in the first cavity, and the bending traction rope is located in the second cavity.

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