Medical device and its lock

Abstract

The present application relates to a kind of medical device and its locker, locker includes first locking piece, second locking piece and clamping piece, first locking piece has first inner cavity and first perforation being communicated, second locking piece has second inner cavity and second perforation being communicated, second locking piece is threadedly connected with first locking piece, and first inner cavity and second inner cavity form installation cavity jointly, clamping piece includes tube body and chuck being connected to tube body, clamping piece is located in installation cavity, and two ends of tube body are communicated with first perforation and second perforation respectively, when second locking piece rotates relative to first locking piece to extrude clamping piece, chuck is radially clamped relative to tube body.This medical device and its locker, when second locking piece rotates relative to first locking piece, chuck is radially clamped relative to tube body, so, it can be used chuck to sequentially pass through first perforation, tube body and second perforation Wire is stably held, realizes locking wire.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical device and its locking mechanism. Background Technology

[0002] In interventional vascular treatments and surgeries, guidewires and medical devices with indwelling wires are frequently used. A significant portion of these devices remain outside the patient's body for extended periods and are easily movable. Currently, during procedures, guidewires, indwelling wires, and other equipment left outside the patient's body are often scattered freely on the operating table.

[0003] In related technologies, some instruments are equipped with locking devices to secure the metal placement wire. However, insufficient locking force still exists, failing to meet the instrument's usage requirements, leading to locking failure and resulting in displacement.

[0004] Therefore, this patent designs a guide wire locking device structure that uses a threaded structure to rotate and control a metal clamp to clamp a metal guide wire or indwelling wire, providing the expected locking force to meet the product's usage requirements. At the same time, this structure can be equipped with a specific connection structure and can be used in conjunction with other medical devices to solve the current situation of insufficient locking force. Summary of the Invention

[0005] Based on this, a medical device and its locking mechanism are provided to solve the problem of insufficient locking force.

[0006] On one hand, the present invention provides a locking device, comprising:

[0007] The first locking member has a first communicating cavity and a first through hole;

[0008] The second locking member has a second inner cavity and a second through hole that are connected to each other. The second locking member is threadedly connected to the first locking member, and the first inner cavity and the second inner cavity together form an installation cavity.

[0009] The clamping member includes a tube body and a clamp connected to the tube body. The clamping member is disposed in the mounting cavity, and the two ends of the tube body are respectively connected to the first through hole and the second through hole. When the second locking member rotates relative to the first locking member to squeeze the clamping member, the clamping member clamps the tube body radially.

[0010] In one embodiment, the chuck includes a plurality of clamping portions spaced apart around a clamping axis, each of the clamping portions being connected to the tube body. When the chuck is squeezed to clamp relative to the tube body radially, the plurality of clamping portions move closer to each other radially.

[0011] In one embodiment, at least a portion of the clamping portion is provided with serrations located on the clamping surface of the clamping portion.

[0012] In one embodiment, the chuck has a contact surface for receiving compressive force, the contact surface being enclosed in a frustum shape, and the diameter of the chuck gradually decreases in the direction away from the tube body.

[0013] And / or, the end face of the clamp is circular and has a chamfer, the chamfer being used to contact the first locking member or the second locking member.

[0014] In one embodiment, the clamping member is a double-headed clamping member with two clamping heads. The two clamping heads are located at both ends of the tube body and are in contact with the first locking member and the second locking member, respectively. When the second locking member rotates relative to the first locking member to squeeze the clamping member, the two clamping heads are driven by the first locking member and the second locking member to clamp the tube body radially.

[0015] In one embodiment, the first locking member has a first abutting surface, and the second locking member has a second abutting surface. Both the first abutting surface and the second abutting surface are conical surfaces or frustum surfaces, and are in contact with the two clamps respectively.

[0016] In one embodiment, the clamping member is a single-head clamping member having one clamping head located at one end of the tube body.

[0017] In one embodiment, the clamp contacts the first locking member and is able to clamp relative to the tube body radially under the compression of the first locking member;

[0018] Alternatively, the clamp contacts the second locking member and can be radially clamped relative to the tube body under the compression of the second locking member;

[0019] Alternatively, the locking device may include two clamping members, one of which has its clamping head in contact with the first locking member, and the other of which has its clamping head in contact with the second locking member.

[0020] In one embodiment, the locking device includes two clamping members, the tubes of the two clamping members being coaxially arranged and communicating with each other, the chuck of one clamping member contacting the first locking member, and the chuck of the other clamping member contacting the second locking member.

[0021] In one embodiment, the locking device includes a positioning element that is sleeved on the tube body and abuts against the side of the clamp facing the tube body, the positioning element being configured to radially position the tube body within the mounting cavity.

[0022] In one embodiment, the positioning element includes a connected sleeve portion and a support portion, the sleeve portion being fitted onto the tube body, and the support portion abutting against the peripheral sidewall of the mounting cavity.

[0023] On the other hand, the present invention provides a medical device including the above-described locking device.

[0024] The aforementioned medical device and its locking mechanism, with the clamping member disposed in the mounting cavity formed by the first and second locking members, utilizes the threaded connection between the first and second locking members to compress the clamping member when the second locking member rotates relative to the first locking member. This causes the clamping head of the clamping member to radially clamp the tube body of the clamping member. In this way, the clamping head can be used to stably clamp the guide wire that passes through the first perforation, the tube body, and the second perforation in sequence, thereby locking the guide wire and solving the problem of insufficient locking force. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the locking device of a medical device according to an embodiment of the present invention;

[0027] Figure 2 A cross-sectional structural schematic diagram of the locking device of a medical device according to one embodiment;

[0028] Figure 3 A schematic diagram of the clamping member of a locking device according to one embodiment;

[0029] Figure 4 This is an exploded view of the locking device according to one embodiment;

[0030] Figure 5 A schematic diagram of the positioning element of a locking device according to one embodiment;

[0031] Figure 6 A schematic diagram of the clamping member of a locking device according to another embodiment;

[0032] Figure 7 for Figure 6The diagram shown is a cross-sectional view of the clamping component assembled to the locking device.

[0033] Figure 8 A schematic diagram of another embodiment of the clamping component of the locking device;

[0034] Figure 9 for Figure 8 Another perspective view of the clamping component of the locking device is shown;

[0035] Figure 10 A schematic diagram of another embodiment of the clamping member of the locking device;

[0036] Figure 11 for Figure 10 Another perspective view of the clamping component of the locking device is shown;

[0037] Figure 12 A schematic diagram of another embodiment of the clamping component of the locking device;

[0038] Figure 13 for Figure 12 Another perspective view of the clamping component of the locking device is shown;

[0039] Figure 14 This is a cross-sectional view of a locking device according to another embodiment.

[0040] Figure label:

[0041] 10. Locking device; 11. First locking element; 11a. First inner cavity; 11b. First through hole; 11c. First abutment surface; 12. Second locking element; 12a. Second inner cavity; 12b. Second through hole; 12c. Second abutment surface; 13. Clamping element; 13a. Groove; 131. Tube body; 132. Chuck; 132a. Clamping part; 132b. Serration; 132c. Contact surface; 14. Positioning element; 141. Socket part; 141a. Receiving cavity; 142. Support part; 15. Luer connector. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0044] The terms “vertical,” “horizontal,” “up,” “down,” “left,” “right,” and similar expressions are for illustrative purposes only and do not represent the only possible implementation.

[0045] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present 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 limitations on the present invention.

[0046] One embodiment of the present invention provides a medical device including a locking device. The medical device can be a device containing catheters such as vascular sheaths or puncture sheaths, and includes, but is not limited to, interventional device delivery devices, puncture devices, or interventional rotational atherectomy devices. Taking an interventional device delivery device as an example, the interventional device delivery device is used to deliver interventional devices (such as artificial heart valve stents, left atrial appendage occluders, vascular stents, etc.) to the lesion site in the human body. During this process, a guidewire is used to construct a delivery path for the interventional device within the human body.

[0047] A locking device is used to lock slender elements such as guidewires, metal wires, and indwelling wires inserted into catheters, preventing the slender elements from shifting relative to the catheter, thus locking the relative position of the slender elements and the catheter. For example, in interventional surgery, after establishing a delivery path using a guidewire, to prevent axial displacement of the guidewire that could prevent accurate guidance of catheters such as delivery sheaths or puncture sheaths into the appropriate position, a locking device is used to lock the position of the guidewire, making it less likely to loosen and ensuring the smooth progress of the procedure.

[0048] In the following description, for ease of understanding, a slender element is used as an example to illustrate the locking device, but it is not limited to using the locking device only for locking the guide wire.

[0049] Specifically, in combination Figure 1 and Figure 2As shown, the locking device 10 includes a first locking member 11, a second locking member 12, and a clamping member 13. The first locking member 11 and the second locking member 12 are threadedly connected, so that when the second locking member 12 rotates relative to the first locking member 11, under the action of the threaded thrust between them, the second locking member 12 moves relative to the first locking member 11 axially (i.e., in the direction of the extension of the axis of rotation when the second locking member 12 rotates relative to the first locking member 11). In this embodiment, the relative axial movement of the first locking member 11 and the second locking member 12 generates a compressive force on the clamping member 13, causing the clamping member 13 to clamp the guide wire, thereby locking the guide wire and preventing axial movement.

[0050] The first locking member 11 has a first inner cavity 11a and a first through hole 11b that are connected to each other, and the second locking member 12 has a second inner cavity 12a and a second through hole 12b that are connected to each other. Based on the threaded connection between the first locking member 11 and the second locking member 12, preferably, the space enclosed by the peripheral sidewalls of the first inner cavity 11a and the second inner cavity 12a is cylindrical, and correspondingly, the first through hole 11b and the second through hole 12b can pass through the first locking member 11 and the second locking member 12 along the center lines of the first inner cavity 11a and the second inner cavity 12a, respectively.

[0051] Understandably, the diameters of the first perforation 11b and the second perforation 12b need only be large enough to accommodate the passage of the guide wire.

[0052] After the second locking member 12 is threadedly connected to the first locking member 11, the first inner cavity 11a and the second inner cavity 12a together form the mounting cavity. The clamping member 13 is disposed in the mounting cavity. As a result, when the first locking member 11 and the second locking member 12 move relative to each other in the axial direction, the volume of the mounting cavity will change. Thus, the clamping member 13 located in the mounting cavity will be squeezed by the first locking member 11 and the second locking member 12, or the first locking member 11 and the second locking member 12 will release the squeeze on the clamping member 13.

[0053] Specifically, the clamping member 13 includes a tube body 131 and a chuck 132 connected to the tube body 131. When the clamping member 13 is inserted into the mounting cavity, both ends of the tube body 131 are connected to the first through hole 11b and the second through hole 12b, respectively, so that the guide wire can pass through the first through hole 11b, the tube body 131 and the second through hole 12b in sequence. When the second locking member 12 rotates relative to the first locking member 11 and moves axially to compress the clamping member 13, the chuck 132 clamps radially relative to the tube body 131 to clamp and fix the guide wire, thereby achieving the purpose of locking the position of the guide wire.

[0054] Understandably, since the first locking member 11 and the second locking member 12 are connected by threads, the second locking member 12 can rotate relative to the first locking member 11 in either a tightening or loosening direction (opposite to the tightening direction). When the second locking member 12 rotates relative to the first locking member 11 in a tightening direction, the clamping member 13 experiences increased pressure from both, causing the clamping head 132 of the clamping member 13 to radially clamp relative to the tube body 131, thus locking the guide wire. Conversely, when the second locking member 12 rotates relative to the first locking member 11 in a loosening direction, the clamping force on the clamping member 13 decreases, causing the clamping head 132 of the clamping member 13 to release the guide wire, thereby releasing the locking effect on the guide wire.

[0055] In the locking device 10 of the present invention, on the one hand, the threaded connection between the first locking member 11 and the second locking member 12 has good self-locking performance, so it is not easy to loosen after locking the guide wire, thereby improving the locking stability of the guide wire and avoiding the probability of the guide wire easily shifting due to insufficient clamping force; on the other hand, the thread precision is well controllable, which is conducive to improving the axial movement accuracy of the second locking member 12 relative to the first locking member 11, thereby allowing for fine adjustment of the locking force of the clamping member 13 on the guide wire, so as to reasonably control the magnitude of the locking force, enabling the locking device 10 of the present invention to adapt to the stable locking needs of guide wires of various diameters.

[0056] Combination Figure 3 As shown, the chuck 132 includes a plurality of clamping portions 132a arranged at intervals around its clamping axis, and all of the clamping portions 132a are connected to the tube body 131. Understandably, the clamping axis of the chuck 132 is aligned with the axial direction of the guide wire when the chuck 132 clamps the guide wire, so that when the chuck 132 clamps relative to the tube body 131, it can clamp the guide wire to lock the guide wire.

[0057] The number of clamping parts 132a in the chuck 132 can be two or more. For example, Figure 3 The clamping member 13 shown includes a chuck 132 with four clamping portions 132a. The number of clamping portions 132a is not limited here, as long as it is sufficient to clamp the guide wire and lock its position.

[0058] Combination Figure 2 and Figure 3As shown, when the chuck 132 is squeezed to radially clamp relative to the tube body 131, the plurality of clamping portions 132a move closer to each other radially. In this embodiment, the squeezing force of the chuck 132 comes from the axial relative movement of the first locking member 11 and the second locking member 12. Specifically, the axial movement occurs due to the relative rotation of the first locking member 11 and the second locking member 12, which squeezes the clamping member 13, causing the plurality of clamping portions 132a of the chuck 132 to move closer to each other radially, thereby clamping the guide wire and locking the position of the guide wire.

[0059] Furthermore, the clamping part 132a is provided with serrations 132b (see...). Figure 9 As shown, the serration 132b is located on the clamping surface of the clamping part 132a, so that when the chuck 132 clamps the guide wire, the clamping part 132a contacts the guide wire. The arrangement of the serration 132b increases the contact friction between the clamping part 132a and the guide wire, and thus the clamping stability of the chuck 132 on the guide wire can be improved through this structural arrangement.

[0060] It should be noted that, for the chuck 132, all clamping portions 132a of the chuck 132 may be provided with serrations 132b, or only some clamping portions 132a may be provided with serrations 132b. As long as at least one clamping portion 132a is provided with serrations 132b, the serrations 132b can improve the clamping stability of the guide wire.

[0061] In some embodiments, the sawtooth 132b can be a threaded tooth, and specifically, the specific cross-sectional shape can be triangular, rectangular, or trapezoidal.

[0062] The serration 132b may not be a threaded tooth. For example, the serration 132b may be a convex tooth structure. Multiple convex tooth structures may be uniformly arranged on the clamping part 132a or non-uniformly arranged on the clamping part 132a. The type, shape and arrangement of the serration 132b will not be described in detail here.

[0063] Continue reading Figure 3 As shown, the chuck 132 has a contact surface 132c, which is used to receive the compressive force. That is, when the first locking member 11 and the second locking member 12 move relative to each other to compress the clamping member 13, the contact surface 132c of the chuck 132 is compressed, so that the chuck 132 is radially clamped relative to the tube body 131 under the compression action to clamp the guide wire.

[0064] In this embodiment, the shape enclosed by the contact surface 132c is frustum-shaped, and the diameter of the chuck 132 gradually decreases in the direction away from the tube body 131. When the first locking member 11 and the second locking member 12 move relative to each other in the axial direction, the compressive force acting on the contact surface 132c of the clamping member 13 has a radial component, thereby causing the chuck 132 to clamp relative to the tube body 131 in the radial direction.

[0065] Understandably, as the second locking member 12 rotates relative to the first locking member 11 in the tightening direction, the contact surface 132c of the chuck 132 is subjected to compressive force and clamps radially relative to the tube body 131. As the second locking member 12 rotates relative to the first locking member 11 in the loosening direction, the compressive force of the second locking member 12 and the first locking member 11 on the clamping member 13 decreases. At this time, the compressive force on the contact surface 132c of the chuck 132 also decreases, and the chuck 132 gradually loosens to release the locking of the guide wire.

[0066] The material of the chuck 132 can be a metal such as copper, stainless steel, or aluminum alloy, to provide good elastic deformation properties. In some embodiments, the material of the chuck 132 can also be a material with elastic properties such as plastic or rubber. The material of the chuck 132 is not limited here.

[0067] The clamping component 13 can be a single-piece structure, in which case the chuck 132 and the tube body 131 are integrally formed. Specifically, the tube body 131 and the chuck 132 can be made of the same material. For example, the overall material of the clamping component 13 can be a metal such as copper, stainless steel, or aluminum alloy. When the tube body 131 and the chuck 132 are made of the same material, only one material needs to be used in the manufacturing process of the clamping component 13, thereby simplifying the processing steps.

[0068] Continue reading Figure 3 As shown, in some embodiments, the clamping member 13 is formed by cutting a pipe fitting with a boss at the end. Specifically, the end of the pipe fitting is provided with a frustum, and the frustum is cut along the axial direction and divided into multiple clamping portions 132a in the circumferential direction.

[0069] The clamping member 13 is provided with a partition groove 13a, which extends through the tube body 131 through the chuck 132 and divides the chuck 132 radially into a plurality of clamping portions 132a spaced apart from each other. The corresponding adjacent partition grooves 13a of the tube body 131 can support the corresponding clamping portion 132a and adaptively improve the elastic restoring performance of the clamping portion 132a.

[0070] Understandably, the partition 13a may simply separate multiple clamping portions 132a, or it may simultaneously divide the portion of the tube body 131 near the clamping portion 132a, in order to improve the elastic reset performance of the clamping portion 132a relative to the tube body 131 in the radial direction.

[0071] The clamp 132 and the tube body 131 can also be connected as one piece by welding, snap-fit ​​connection or threaded connection, etc., which is not limited here.

[0072] In some embodiments, the end face of the chuck 132 is circular and has a chamfer. In this embodiment, the chamfered surface is used to withstand the compressive force so that the chuck 132 can be radially clamped. Specifically, the chamfer is used to contact the first locking member 11 or the second locking member 12, so that when the first locking member 11 and the second locking member 12 compress the clamping member 13, the chamfer bears the compressive force and causes the chuck 132 to be radially clamped relative to the tube body 131.

[0073] In some embodiments, the wall thickness of the tube body 131 is negligible relative to the radial dimension of the chuck 132. Specifically, the clamping portion 132a of the chuck 132 protrudes from both the outer and inner peripheral sidewalls of the tube body 131. This allows the chuck 132 to meet the clamping requirements of the slender guide wire. Furthermore, the small wall thickness of the tube body 131 (i.e., from the outer to the inner peripheral sidewall) facilitates elastic deformation and easy recovery from deformation. This allows the chuck 132 to clamp the guide wire when compressed, and when the first locking member 11 and the second locking member 12 release the pressure on the clamping member 13, the chuck 132 can open radially relative to the tube body 131 to release the clamping of the guide wire.

[0074] Combination Figure 2 , Figure 4 and Figure 5 As shown, the locking device 10 includes a positioning member 14, which is sleeved on the tube body 131 and abuts against the side of the clamp 132 facing the tube body 131. The positioning member 14 is configured to position the tube body 131 radially within the mounting cavity, thereby making it less likely for the clamping member 13 to shift radially within the mounting cavity. This allows the clamping member 13 to be stably clamped when the first locking member 11 and the second locking member 12 move axially.

[0075] It should be noted that, based on the positioning element 14's ability to radially position the tube body 131 within the mounting cavity, when the clamping element 13 and the positioning element 14 are assembled together into the mounting cavity, the two ends of the tube body 131 correspond to the first through hole 11b and the second through hole 12b, respectively. The positioning element 14's positioning of the clamping element 13 maintains the centeredness of the clamping element 13 within the mounting cavity. Furthermore, both the first through hole 11b and the second through hole 12b are coaxially arranged with the clamping center of the clamping head 132 of the clamping element 13, so that when the clamping element 13 clamps the guide wire passing through the first through hole 11b and the second through hole 12b, the guide wire is less likely to deflect radially.

[0076] The positioning member 14 includes a sleeve portion 141 and a support portion 142 connected to each other. The sleeve portion 141 is sleeved on the tube body 131, and the support portion 142 abuts against the peripheral wall of the mounting cavity. Thus, the positioning member 14 fills the gap between the tube body 131 and the peripheral wall of the mounting cavity, so as to play a radial positioning role for the clamping member 13.

[0077] Combination Figure 2 and Figure 5 As shown, the sleeve portion 141 has a receiving cavity 141a. When the sleeve portion 141 is sleeved on the tube body 131, the receiving cavity 141a can receive the tube body 131, and the clamp 132 is exposed in the receiving cavity 141a. Understandably, the outer wall of the tube body 131 and the cavity wall of the receiving cavity 141a can be a clearance fit or an interference fit, which is not limited here.

[0078] It should be noted that in some embodiments, the positioning member 14 is in the shape of a straight tube. To be precise, the support part 142 can be omitted. In this case, the positioning member 14 can still use the sleeve part 141 to axially position the tube 131 disposed therein.

[0079] The socket 141 and the support 142 can be integrally molded by injection molding. In some embodiments, the positioning member 14 is made of PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene), PP (Polypropylene), POM (Polyoxymethylene), PTFE (Polytetrafluoroethylene), or PE (Polyethylene). In this way, the positioning member 14 can support the clamping member 13 while reducing friction with the peripheral wall of the mounting cavity, facilitating the rotation of the second locking member 12 relative to the first locking member 11.

[0080] It should be noted that the clamping position of the clamping member 13 corresponding to the axial direction of the guide wire can be one place or two places.

[0081] Specifically, the clamping member 13 can be a single-headed clamping member or a double-headed clamping member. Combined with... Figure 3 As shown, a single-head clamping member refers to a clamping member 13 having only one clamping head 132. In this case, the clamping member 13 has only one clamping position corresponding to the guide wire axis. (Combined with...) Figure 6 As shown, the dual-head clamping component refers to the clamping component 13 having two clamps 132. At this time, the clamping component 13 has two clamping positions corresponding to the guide wire axis.

[0082] The structure of the locking device 10 will be further described below in conjunction with the single-head clamping device and the double-head clamping device.

[0083] In embodiments where the clamping member 13 is a single-headed clamping member, the clamping member 13 has one clamping head 132 located at one end of the tube body 131. The clamping head 132 may be located within the first inner cavity 11a of the first locking member 11 or within the second inner cavity 12a of the second locking member 12. Exemplarily, in some embodiments, the clamping head 132 contacts the first locking member 11 and is capable of radially clamping relative to the tube body 131 under the compression of the first locking member 11. In other embodiments, the clamping head 132 contacts the second locking member 12 and is capable of radially clamping relative to the tube body 131 under the compression of the second locking member 12.

[0084] It should be noted that when the clamping member 13 is a single-head clamping member, two clamping members 13 can be set in the mounting cavity to facilitate the two clamping members 13 to clamp the guide wire at different positions in the axial direction, thereby increasing the clamping force and improving the locking stability.

[0085] Specifically, in combination Figure 2 As shown, when the locking device 10 includes two clamping members 13, the clamping head 132 of one clamping member 13 is in contact with the first locking member 11, and the clamping head 132 of the other clamping member 13 is in contact with the second locking member 12.

[0086] The two clamping elements 13 are coaxially arranged. To be precise, the tube bodies 131 of the two clamping elements 13 are coaxially arranged and connected to each other. In this way, when the guide wire passes through the two clamping elements 13, it can maintain good coaxiality at the clamping position of the corresponding clamp 132, thereby reducing the probability of the guide wire bending.

[0087] Furthermore, in this embodiment, the two clamping members 13 can be kept coaxial under the constraint of the positioning member 14. Specifically, since the positioning member 14 is sleeved on the tube body 132 of the two clamping members 13, the positioning member 14 can maintain the coaxiality of the two clamping members 13.

[0088] When the second locking member 12 rotates relative to the first locking member 11 and tightens itself, it is squeezed by the first locking member 11 and the second locking member 12. The clamps 132 of the two clamping members 13 are radially clamped relative to their respective tube bodies 131 to clamp the guide wire at two different positions in the axial direction, which increases the locking force on the guide wire and makes it less likely for the guide wire to shift.

[0089] In an embodiment where the locking device 10 includes a positioning member 14, two clamping members 13 can be assembled to the positioning member 14 from both ends, and then inserted together with the positioning member 14 into the first inner cavity 11a of the first locking member 11. Then, the second locking member 12 is inserted into the first inner cavity 11a and rotated relative to the first locking member 11, so that the second locking member 12 is threadedly connected to the first locking member 11, thus completing the installation of the locking device 10.

[0090] After the locking device 10 is assembled, when the second locking member 12 rotates relative to the first locking member 11 in the tightening direction, the second locking member 12 moves closer to the first locking member 11. Subsequently, the first locking member 11 and the second locking member 12 press against the clamps 132 of the two clamping members 13, causing the clamps 132 of the two clamping members 13 to clamp the guide wire. Correspondingly, when it is necessary to release the locking of the guide wire, simply rotate the second locking member 12 relative to the first locking member 11 in the loosening direction. The second locking member 12 moves away from the first locking member 11, and the clamps 132 of the two clamping members 13 release the guide wire.

[0091] Combination Figure 6 and Figure 7 As shown, in an embodiment where the clamping member 13 is a double-headed clamping member, the double-headed clamping member has two clamps 132, which are located at both ends of the tube body 131. In this embodiment, the two clamps 132 abut against the first locking member 11 and the second locking member 12, respectively. When the second locking member 12 moves relative to the first locking member 11 to squeeze the clamping member 13, the two clamps 132, driven by the first locking member 11 and the second locking member 12, respectively clamp relative to the tube body 131 radially, thereby clamping the guidewire at different positions in the axial direction, improving the locking stability of the guidewire, making it less prone to displacement, and ensuring the surgical effect.

[0092] Furthermore, the first locking member 11 has a first abutting surface 11c, and the second locking member 12 has a second abutting surface 12c. Both the first abutting surface 11c and the second abutting surface 12c are frustoconical surfaces and are in contact with the two clamps 132 respectively. Thus, when the first locking member 11 and the second locking member 12 compress the clamping member 13 located in the mounting cavity, the first abutting surface 11c and the second abutting surface 12c can apply axial force and radial force to the two clamps 132 respectively, thereby causing the two clamps 132 to be radially clamped relative to the tube body 131 to clamp at different positions in the axial direction of the guide wire, thereby increasing the locking force and enhancing the locking stability of the guide wire.

[0093] It should be noted that in some embodiments, the first abutting surface 11c and the second abutting surface 12c can also be conical surfaces, thus still satisfying the need to apply radial compressive force to the chuck 132. Whether the first abutting surface 11c is conical or frustum-shaped, and whether the second abutting surface 12c is conical or frustum-shaped, is not limited here. As long as the axial movement of the first locking member 11 and the second locking member 12 during relative rotation allows the first abutting surface 11c and the second abutting surface 12c to respectively compress the corresponding chuck 132, so that the chuck 132 is radially clamped relative to the tube body 131, it is sufficient. Understandably, when the clamping member 13 is a single-head clamping member, since the clamping member 13 has only one chuck 132, it is only necessary to provide a corresponding abutting surface on the locking member corresponding to the chuck 132. Specifically, taking the example of a clamping member 13 located between the first locking member 11 and the second locking member 12, in an embodiment where the clamping head 132 of the clamping member 13 contacts the first locking member 11, it is only necessary to provide a first abutting surface 11c on the first locking member 11 to compress the clamping head 132 radially. Correspondingly, in an embodiment where the clamping head 132 of the clamping member 13 contacts the second locking member 12, it is only necessary to provide a second abutting surface 12c on the second locking member 12 to compress the clamping head 132 radially. When two clamping members 13 are located between the first locking member 11 and the second locking member 12, the first locking member 11 and the second locking member 12 are respectively provided with a first abutting surface 11c and a second abutting surface 12c to compress the corresponding clamping head 132, so that both clamping heads 132 can be radially clamped relative to their respective tube bodies 131.

[0094] Furthermore, the chuck 132, which contacts the first locking member 11, has surface contact with the first abutting surface 11c. Based on this, the inclination angle of the contact surface 132c of the chuck 132 is consistent with the inclination angle of the first abutting surface 11c, ensuring good contact between the first contact surface 132c and the first contact surface 132c. This facilitates the first locking member 11 applying a compressive force to the corresponding chuck 132, causing the chuck 132 to radially clamp relative to the tube body 131. It should be noted that, in this embodiment of the invention, the inclination angle of a surface refers to the angle between the surface and the axial direction of the structural member on its axial cross-section. Taking the first abutting surface 11c of the first locking member 11 as an example, the inclination angle of the first abutting surface 11c refers to the angle between the first abutting surface 11c and the axial direction of the first locking member 11 on its axial cross-section.

[0095] Correspondingly, the clamp 132 that contacts the second locking member 12 is in surface contact with the second abutting surface 12c, so that the second locking member 12 can apply a squeezing force to the corresponding clamp 132, causing the clamp 132 to be radially clamped relative to the tube body 131.

[0096] It should be noted that, regardless of whether the clamping member 13 is a double-headed clamping member or a single-headed clamping member, as long as the first locking member 11 and / or the second locking member 12 corresponding to the clamp 132 of the clamping member 13 can radially compress the clamp 132, the clamp 132 can be radially clamped relative to the tube body 131 to lock the guide wire.

[0097] As mentioned above, when the clamping member 13 is a single-head clamping member, the number of clamping portions 132a of the clamping head 132 can be two or more. Correspondingly, when the clamping member 13 is a double-head clamping member, the structures of the clamping heads 132 located at both ends of the tube body 131 can be the same or different.

[0098] For example, the number of clamping portions 132a located at both ends of the tube body 131 can be equal. In some embodiments, combined with Figure 8 and Figure 9 As shown, the clamps 132 located at both ends of the tube body 131 each include two clamping portions 132a. (Combined with...) Figure 10 and Figure 11 As shown, the clamps 132 located at both ends of the tube body 131 each include three clamping parts 132a. (Combined with...) Figure 12 and Figure 13 As shown, the clamps 132 located at both ends of the tube body 131 each include four clamping parts 132a.

[0099] It should be noted that, regardless of whether the clamps 132 located at both ends of the tube body 131 include two clamping parts 132a or more clamping parts 132a, the surface roughness of the clamping parts 132a can be improved by setting serrations 132b on the clamping parts 132a, so as to improve the clamping stability of the clamps 132 on the guide wire.

[0100] In some embodiments, the number of clamping portions 132a at both ends of the tube body 131 may vary. For example, the clamp 132 at one end of the tube body 131 may have two clamping portions 132a, and the clamp 132 at the other end of the tube body 131 may have three clamping portions 132a. As another example, the clamp 132 at one end of the tube body 131 may have three clamping portions 132a, and the clamp 132 at the other end of the tube body 131 may have five clamping portions 132a. The number of clamping portions 132a in the clamp 132 is not limited here.

[0101] Combination Figure 14 As shown, the first locking member 11 is provided with a connecting structure to facilitate connection with catheters such as vascular sheaths and puncture sheaths in medical devices. The connecting structure can be integrally formed into the first locking member 11. When the connecting structure is made of plastic, it can be connected to the first locking member 11 by injection molding.

[0102] The connection structure can specifically be at least one of a Luer connector 15 and a locking thread. In some embodiments, the connection structure can also be a snap-fit ​​connector or a snap-fit ​​interface, which is not limited here.

[0103] It should be noted that the connecting structure can also be set in the second locking member 12. As long as either the first locking member 11 or the second locking member 12 is provided with a connecting structure, the locking device 10 can be easily fitted into the medical device.

[0104] It should be noted that, in the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0105] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0106] In this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A locking device, characterized in that, include: The first locking member has a first communicating cavity and a first through hole; The second locking member has a second inner cavity and a second through hole that are connected to each other. The second locking member is threadedly connected to the first locking member, and the first inner cavity and the second inner cavity together form an installation cavity. A clamping member includes a tube body and a clamp connected to the tube body. The clamping member is disposed within the mounting cavity, and the two ends of the tube body are respectively connected to the first through hole and the second through hole. When the second locking member rotates relative to the first locking member to squeeze the clamping member, the clamping member radially clamps the tube body relative to it. The clamping member includes a plurality of clamping parts arranged at intervals around the clamping axis. Each of the plurality of clamping parts is connected to the tube body. The clamping parts protrude from the outer peripheral sidewall and the inner peripheral sidewall of the tube body. The locking member includes a positioning member, which is sleeved on the tube body and abuts against the side of the clamping member facing the tube body. The positioning member includes a connected sleeve part and a supporting part. The sleeve part is sleeved on the tube body, and the supporting part abuts against the peripheral sidewall of the mounting cavity.

2. The locking device according to claim 1, characterized in that, At least a portion of the clamping portion is provided with serrations, which are located on the clamping surface of the clamping portion.

3. The locking device according to claim 1, characterized in that, The chuck has a contact surface for receiving compressive force. The shape enclosed by the contact surface is frustum-shaped, and the diameter of the chuck gradually decreases in the direction away from the tube body.

4. The locking device according to claim 1 or 3, characterized in that, The end face of the clamp is circular and has a chamfer, which is used to contact the first locking member or the second locking member.

5. The locking device according to claim 1, characterized in that, The clamping member is a double-headed clamping member with two clamping heads. The two clamping heads are located at both ends of the tube body and are in contact with the first locking member and the second locking member, respectively. When the second locking member rotates relative to the first locking member to squeeze the clamping member, the two clamping heads are driven by the first locking member and the second locking member to clamp the tube body radially.

6. The locking device according to claim 5, characterized in that, The first locking member has a first abutting surface, and the second locking member has a second abutting surface. Both the first abutting surface and the second abutting surface are conical surfaces or frustum surfaces, and are in contact with the two clamps respectively.

7. The locking device according to claim 1, characterized in that, The clamping member is a single-head clamping member, having one clamping head located at one end of the tube body.

8. The locking device according to claim 7, characterized in that, The clamp contacts the first locking member and can be radially clamped relative to the tube body under the compression of the first locking member.

9. The locking device according to claim 7, characterized in that, The clamp contacts the second locking member and can be radially clamped relative to the tube body under the compression of the second locking member.

10. The locking device according to claim 7, characterized in that, The locking device includes two clamping members, one of which has its clamping head in contact with the first locking member, and the other of which has its clamping head in contact with the second locking member.

11. The locking device according to claim 7, characterized in that, The locking device includes two clamping members, the tubes of the two clamping members are coaxially arranged and connected to each other, the clamp of one clamping member is in contact with the first locking member, and the clamp of the other clamping member is in contact with the second locking member.

12. A medical device, characterized in that, Includes the locking device as described in any one of claims 1-11.

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