Connecting device, conveyor and conveying system

Abstract

The invention relates to a connecting device, a conveyor and a conveying system. The connecting device comprises a plurality of connecting pieces, a plurality of locking pieces and a plurality of driving limiting pieces. The locking pieces, the connecting pieces and the driving limiting pieces are arranged in a one-to-one correspondence mode. A locking groove is formed in the far end of each connecting piece, and when the locking groove is in a locked state and the driving limiting piece and the corresponding connecting piece are relatively static, each locking piece can independently slide in the first direction in the axial direction of the corresponding connecting piece to open the locking groove under the action of external force; when the external force disappears, the corresponding driving limiting piece drives the locking piece to slide in the second direction opposite to the first direction in the axial direction of the connecting piece so as to lock the locking groove, and the locking piece is limited by the corresponding driving limiting piece in the first direction and the second direction. When the driving limiting pieces can be acted at the same time to move in the first direction along the connecting pieces respectively, the locking pieces can be driven at the same time to slide in the first direction along the connecting pieces respectively so as to open the locking grooves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a connecting device, a delivery device and a delivery system. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] Interventional therapy is a method of minimally invasive treatment in which a specific instrument is introduced into a lesion site of a human body through a natural orifice or a small incision of the human body by using a puncture needle, a catheter and other interventional devices under the guidance and monitoring of medical imaging equipment such as digital subtraction angiography, CT, ultrasound and magnetic resonance.

[0004] Interventional therapy includes two types of intervention but not implantation and implantation. Among them, implantation refers to delivering and releasing an implant (for example, a vascular stent, a heart occluder, etc.) to a target site (for example, a blood vessel, a heart, etc.) by a delivery device. The delivery device usually includes a delivery sheath and a pusher, the pusher is detachably connected with the implant, the pusher is axially movably accommodated in the delivery sheath to accommodate the implant in the delivery sheath, and after reaching the target site, the implant is pushed out of the delivery sheath and released at the target site; finally, the connection between the pusher and the implant is released, and the pusher and the delivery sheath are withdrawn from the body, and the operation is completed.

[0005] In order to realize the detachable connection between the implant and the pusher, a connecting device is usually required. The connecting device should meet the following requirements: 1) convenient connection, which can quickly connect the implant and the pusher; 2) reliable connection with the implant, which can avoid premature release or inaccurate release; 3) convenient release, which can quickly release the implant when needed. SUMMARY

[0006] Based on this, it is necessary to provide a connecting device which can be reliably connected with the implant and is convenient for connection and release.

[0007] Further, a delivery device and a delivery system using the above connecting device are provided.

[0008] A connecting device for connecting an implant in a delivery device, comprising: a plurality of connecting pieces, a plurality of locking pieces and a plurality of driving limit pieces, the plurality of locking pieces are arranged one by one corresponding to the plurality of connecting pieces, the plurality of driving limit pieces are arranged one by one corresponding to the plurality of locking pieces, and the plurality of connecting pieces are arranged one by one corresponding to the plurality of driving limit pieces.

[0009] The distal end of each of the connecting members is provided with a locking slot. When the locking slot is in a locked state and the driving limiting member is relatively stationary with respect to the corresponding connecting member, each of the locking members can be independently slid along the axial direction of the corresponding connecting member to the first direction to open the locking slot under the action of an external force. When the external force disappears, the corresponding driving limiting member drives the locking member to slide along the axial direction of the connecting member to the second direction opposite to the first direction to lock the locking slot, and the locking member is limited in the first direction and the second direction by the corresponding driving limiting member.

[0010] When the plurality of driving limiting members are simultaneously actuated to move along the plurality of connecting members to the first direction, the plurality of locking members can be simultaneously driven to slide along the plurality of connecting members to the first direction to open the locking slots.

[0011] When the above connecting device is used, an external force can be independently applied to each locking member to make each locking member independently slide along the axial direction of the corresponding connecting member to the first direction to open the locking slot, so as to extend the connecting structure of the implant into the locking slot. When the external force disappears, the corresponding driving limiting member automatically drives the locking member to slide along the axial direction of the connecting member to the second direction to close the locking slot, and the locking member is limited by the corresponding driving limiting member, thereby avoiding the undesired opening of the locking slot and the occurrence of the falling phenomenon, so as to realize the reliable connection between the implant and the connecting member. Since each locking member and the corresponding driving limiting member can independently act, the locking slot can be locked after each connecting structure of the implant is connected with the connecting member, without the need to operate all the locking members to move to lock all the locking slots after all the connecting structures are connected with the connecting member. In this way, when the plurality of connecting members are sequentially connected with the plurality of connecting structures of the implant, the previously connected connecting structure and the connecting member can be prevented from falling, so that the connection can be completed at one time without the need to reconnect due to falling. Moreover, during the installation process, the corresponding driving limiting member automatically drives the locking member to slide to close the locking slot after the external force disappears, thereby facilitating the installation.

[0012] When it is necessary to release, the plurality of driving limiting members can simultaneously drive the plurality of locking members to slide along the plurality of connecting members to the first direction to open all the locking slots, so as to simultaneously release the plurality of connecting structures of the implant from the plurality of connecting members, thereby facilitating the release.

[0013] A connecting device for connecting an implant in a conveyor, comprising:

[0014] A plurality of connecting members, the distal end of each of the connecting members is provided with a locking slot, and a guide rail is formed on each connecting member, the guide rail comprises an axial direction extending guide rail and a radial protruding portion communicated with the guide rail;

[0015] A plurality of locking members corresponding to the plurality of connecting members, each of the locking members being sleeved on the corresponding connecting member, and each of the locking members being provided with a sliding rail;

[0016] A plurality of driving limiting members corresponding to the plurality of locking members and the plurality of connecting members, the distal end of each of the driving limiting members penetrating the sliding rail of the corresponding locking member in the radial direction, and the proximal end of each of the driving limiting members extending along the axial direction of the corresponding connecting member;

[0017] When the locking slot is in the locked state, the distal end surface of the driving limiting member is located at the distal end of the distal end surface of the radial protruding portion, and the driving limiting member and the proximal end inner wall of the sliding rail abut against the proximal end of the locking member, the locking slot and the driving limiting member cooperate to limit the locking member in the first direction and the second direction opposite to the first direction;

[0018] When the driving limiting member moves to the first direction to align the distal end of the driving limiting member with the radial protruding portion in the radial direction, the locking member slides to the first direction under the action of an external force to open the locking slot, and when the external force disappears, the corresponding driving limiting member drives the locking member to slide to the second direction opposite to the first direction to lock the locking slot;

[0019] When the plurality of driving limiting members are simultaneously driven to move to the first direction along the plurality of connecting members, the plurality of locking members can be simultaneously driven to slide to the first direction along the plurality of connecting members to open the locking slot.

[0020] In the use of the above connecting device, during loading, the plurality of driving limiting members are simultaneously pulled to align the distal end of the plurality of driving limiting members with the corresponding radial protruding portion in the radial direction, and then the locking member is individually actuated to slide to the first direction to open the locking slot to connect with the implant, and after the locking member is released, the driving limiting member automatically drives the locking member to slide to the second direction to lock the locking slot, thereby completing the loading. Since each locking member and the corresponding driving limiting member can be independently actuated, the connection of the plurality of connecting members with the plurality of connecting structures of the implant can be sequentially completed. In this way, when the plurality of connecting members are sequentially connected with the plurality of connecting structures, the previously connected connecting structure and connecting member can be prevented from falling off, and thus the connection can be completed at one time without the need for reconnection due to falling off. Moreover, the connection can be conveniently operated by one person. When the implant needs to be released, the plurality of driving limiting members are simultaneously pulled to the first direction to open the locking slot and achieve the release, thereby facilitating the release.

[0021] Furthermore, when the locking slot is in the locked state, the locking slot and the driving limiting member cooperate to limit the locking member in the first direction and the second direction opposite to the first direction, thereby improving the reliability of the connection. BRIEF DESCRIPTION OF DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] in:

[0024] Figure 1 This is a schematic diagram of the structure of a conveying system according to one embodiment;

[0025] Figure 2 This is a schematic diagram of the connection structure of an implant according to one embodiment;

[0026] Figure 3 This is a schematic diagram of the structure of a conveyor according to one embodiment;

[0027] Figure 4 This is a schematic diagram of the structure of a connection device according to one embodiment;

[0028] Figure 5 This is a three-dimensional structural diagram of the connector of a connecting device according to one embodiment;

[0029] Figure 6 This is a partial planar structural schematic diagram of a connector according to one embodiment;

[0030] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0031] Figure 8 This is a schematic diagram of the locking slot in the open state during the loading stage of a connecting device according to an embodiment;

[0032] Figure 9 This is a schematic diagram of the locking slot in the open state during the release phase of a connecting device according to an embodiment;

[0033] Figure 10 This is a schematic diagram of the structure of a drive limiting member in its natural state according to an embodiment;

[0034] Figure 11 for Figure 10 The diagram shows the state in which the drive limiting component is radially expanded.

[0035] Figure 12 This is a schematic diagram of the structure of the drive limiting member according to another embodiment;

[0036] Figure 13 A schematic diagram of the drive limiting member in its natural state according to another embodiment;

[0037] Figure 14 For inclusionFigure 13 Structure diagram of the connection device shown in the state of driving the limiting member, with the lock slot in the locked state;

[0038] Figure 15 For use with Figure 13 Structure diagram of the locking member used in cooperation with the connection device shown in the state of driving the limiting member;

[0039] Figure 16 For Figure 14 Structure diagram of the connection device shown in the open state of the lock slot during the loading stage;

[0040] Figure 17 For Figure 14 Structure diagram of the connection device shown in the open state of the lock slot during the release stage;

[0041] Figure 18 Structure diagram of the connection member of another embodiment;

[0042] Figure 19 Structure diagram of the locking member of another embodiment;

[0043] Figure 20 For containing Figure 18 Connection relationship diagram of the connection device shown in the state of driving the limiting member, with the lock slot in the locked state; Figure 19

[0044] For Figure 21 State diagram of the locking member of the connection device shown in the state of driving the limiting member, with the lock slot in the locked state, after radial translation (relative position unchanged in the axial direction); Figure 20

[0045] For Figure 22 In the connection device shown, the lock slot is partially opened but not fully opened during the loading stage; Figure 20

[0046] For Figure 23 State diagram of the connection device shown in the state of driving the limiting member, with the lock slot in the locked state, after radial translation (relative position unchanged in the axial direction); Figure 22

[0047] For Figure 24 In the connection device shown, the lock slot is fully opened during the loading stage; Figure 20

[0048] For Figure 25 State diagram of the connection device shown in the state of driving the limiting member, with the lock slot in the locked state, after radial translation (relative position unchanged in the axial direction); Figure 24

[0049] For Figure 26 Figure 20 ​The connection device shown in the release phase, the lock slot is fully open state schematic diagram;

[0050] Figure 27 To be Figure 26 The locking member of the connection device shown in the state is radially translated (the relative position is unchanged in the axial direction) after the state schematic diagram;

[0051] Figure 28 The structure schematic diagram of the locking member of another embodiment;

[0052] Figure 29 The structure schematic diagram of the locking member of another embodiment;

[0053] Figure 30 The structure schematic diagram of the locking member of another embodiment. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] In the field of interventional medical devices, the end of a medical device that is closer to the operator when the device is implanted in a human or animal body is referred to as the "proximal end", and the end that is farther from the operator is referred to as the "distal end", and the "proximal end" and "distal end" of any component of the medical device are defined according to this principle. The "axial direction" generally refers to the length direction of the medical device when it is being delivered, and the "radial direction" generally refers to the direction of the medical device that is not parallel to the "axial direction", and the "axial direction" and "radial direction" of any component of the medical device are defined according to this principle. The "circumferential direction" refers to the circumferential direction, i.e., the direction around the axis of the lumen structure, the cylinder.

[0058] Referring to Figure 1 A delivery system 100 according to an embodiment includes an implant 1 and a delivery device 2 for delivering and releasing the implant 1 to a target site.

[0059] The implant 1 includes an expandable body 10 and a plurality of connecting structures 30 connected to the expandable body 10. The plurality of connecting structures 30 are spaced apart along the circumferential direction of the expandable body 10. The implant 1 can be a valve prosthesis, a vena cava filter, a vascular stent, an occluder, or the like, which can be implanted in the body of a target subject, such as a human or other animal.

[0060] Referring to Figure 2 A connecting structure 30 according to an embodiment includes a connecting portion 310 and a hooking portion 320. One end of the connecting portion 310 is connected to the expandable body 10, and the other end is connected to the hooking portion 320. The radial dimension W1 of the hooking portion 320 is greater than the radial dimension W2 of the connecting portion 310.

[0061] Referring to Figure 3 A delivery device 2 according to an embodiment includes an inner tube 20, a connecting device 40, and an outer tube 60. The connecting device 40 is connected to the inner tube 20, and is used to detachably connect the implant 1. The outer tube 60 is movably sleeved on the inner tube 20 and the connecting device 40, so as to accommodate the implant 1 in a radially compressed state, and after reaching the target site, the outer tube 60 is retracted, so that part of the implant 1 is radially expanded. After the implant 1 is disconnected from the connecting device 40, the implant 1 is released at the target site.

[0062] In an embodiment, a distal end of the inner tube 20 is provided with a guide head 210, so as to guide the delivery device 2 into the body.

[0063] Referring to Figure 4 The connecting device 40 includes a plurality of connecting members 410, a plurality of locking members 420, and a plurality of driving limit members 430. The plurality of locking members 420 are connected one-to-one to the plurality of connecting members 410, the plurality of driving limit members 430 are connected one-to-one to the plurality of locking members 420, and the plurality of driving limit members 430 are connected one-to-one to the plurality of connecting members 410.

[0064] Referring to Figure 5 , the connecting member 410 is substantially a columnar structure. The connecting member 410 comprises a body 411, and a locking groove 412 is formed at a distal end of the body 411. When the implant 1 is to be connected with the connecting member 410, the connecting structure 30 of the implant 1 is partially inserted into the locking groove 412, and the connecting structure 30 and the locking groove 412 are hooked in the axial direction to avoid the connecting structure 30 from falling off in the axial direction. The connecting member 410 has an inner cavity (not shown in the figure).

[0065] Referring to Figures 5-7 , in an embodiment, the locking groove 412 comprises a groove bottom 4121, a pushing surface 4122 and a separating surface 4123. The pushing surface 4122 and the separating surface 4123 are respectively located at two axially opposite sides of the groove bottom 4121, and the separating surface 4123 is located at a distal end of the pushing surface 4122. The pushing surface 4122 and the separating surface 4123 are spaced apart by a certain distance, so that the locking groove 412 has sufficient accommodation space to accommodate the inserted part of the connecting structure 30.

[0066] In an embodiment, the groove bottom 4121 is parallel to the longitudinal center axis of the connecting member 410, the pushing surface 4122 forms a first included angle A with the groove bottom 4121, and the range of the first included angle A is 80°-100°, so as to block the connecting structure 30 from sliding towards the proximal end and sliding out of the locking groove 4121 along the pushing surface 4122. The separating surface 4123 forms a second included angle B with the groove bottom 4121, and the range of the second included angle B is 30°-60°, so as to prevent the separating surface 4123 from hooking the connecting structure 30 and causing difficulty in releasing the implant 1 when the implant 1 is to be released. Thus, the selection of the size range of the first included angle A and the second included angle B is beneficial to the loading and releasing of the implant 1.

[0067] As shown in Figure 5 , a mounting hole 414 is further formed at a distal end of each connecting member 410, and the mounting hole 414 is located at the distal end of the locking groove 412. The mounting hole 414 penetrates through the side wall of the connecting member 410 and is in communication with the locking groove 412 and the inner cavity of the connecting member 410.

[0068] Referring to Figure 2 , Figure 5 and Figure 7When the connecting structure 30 is connected with the connecting member 410, the connecting portion 310 of the connecting structure 30 enters the locking slot 412 from the mounting hole 414, and the hooking portion 320 is located in the locking slot 412. Since W1 is greater than W2, the pushing surface 4122 and the separating surface 4123 limit the hooking portion 320 in the axial direction. The connecting structure 30 including the connecting portion 310 and the hooking portion 320 cooperates with the locking slot 412 and the mounting hole 414, and the connection is highly reliable, which can avoid the implant 1 from falling off in the axial direction. At the same time, it can also avoid the implant 1 from being displaced in the axial direction to affect the accuracy of the release position. Moreover, it is beneficial to improve the smoothness of the release. When the locking slot 412 is in an open state, the connecting structure 30 is radially popped out from the opening of the locking slot 412.

[0069] It can be understood that in other embodiments, the connecting structure 30 can have other forms, for example, it can be a sleeve structure, which is sleeved on the distal end of the connecting member 410, and when the locking slot 412 is in a locked state, the sleeve structure is limited by the locking piece 420.

[0070] Please refer back to Figure 4 In an embodiment, the locking piece 420 is a sleeve structure. The locking piece 420 is slidably sleeved on the corresponding connecting member 410. Each locking piece 420 can independently slide along the axial direction of the connecting member 410 when subjected to an external force. When the locking piece 420 slides to cover the locking slot 412, the locking slot 412 is in a locked state, and when the locking piece 420 slides to expose the locking slot 412, the locking slot 412 is in an open state. As shown in Figure 4 When the locking slot 412 is in a locked state, the driving limiting piece 430 abuts or hooks with the locking piece 420 to limit the locking piece 420 in the axial direction.

[0071] When the connecting device 40 is in a state as shown in Figure 4 In order to connect with the implant 1, while keeping the driving limiting piece 430 relatively stationary with respect to the connecting member 410, first, the locking piece 420 is pulled in the first direction F1 to slide the locking piece 420 in the axial direction of the connecting member 410 to open the locking slot 412, as shown in Figure 8 Then, the hooking portion 320 and at least part of the connecting portion 310 of the connecting structure 30 are inserted into the locking slot 412. Then, the locking piece 420 is released, and the driving limiting piece 430 automatically drives the locking piece 420 to slide in the axial direction of the connecting member 410 to the position covering the locking slot 412 to lock the implant 1 and the connecting member 410, that is, the connecting device 40 returns to Figure 4The driving limit member 430 and the corresponding locking member 420 are hooked on both sides of the axial direction, when the locking member 420 slides to the second direction F2 to completely cover the locking slot 412, the locking member 420 is simultaneously limited by the driving limit member 430 in the first direction F1 and the second direction F2, so that the locking member 420 cannot continue to slide in the second direction F2 to slide off the connecting member 410, and cannot slide in the first direction F1 without external force. Therefore, without external force, the locking member 420 remains in the position covering the locking slot 412, so that the locking slot 412 remains in the locked state, so it can be reliably connected with the implant 1.

[0072] And because each locking member 420 and the corresponding driving limit member 430 can act independently, so that after each connection of the implant 1 with the connecting member 410 is completed, the locking slot 412 can be locked, without having to wait for all the connecting structures 30 to be connected with the connecting member 410, and then operate all the locking members 420 to close all the locking slots 412. In this way, when multiple connecting members 410 are connected with multiple connecting structures 30 of the implant 1 in sequence, the previously connected connecting structures 30 and the connecting member 410 can be prevented from falling off, so that the connection can be completed at one time, and the connection will not be disconnected and need to be connected again. Further, during installation, after the external force disappears, the corresponding driving limit member 430 automatically drives the locking member 420 to slide in the second direction F2 to lock the locking slot 412, making the connection more convenient.

[0073] When it is necessary to disconnect the connecting member 410 and the connecting structure 30, simultaneously pull the multiple driving limit members 430 in the first direction F1 to simultaneously drive the multiple locking members 420 to slide in the first direction F1 along the axial direction of the multiple connecting members 410 to simultaneously open all the locking slots 412, so that the multiple connecting members 410 and the multiple connecting structures 30 are simultaneously disconnected, thereby achieving the release of the implant 1.

[0074] The state of opening the locking slot 412 by pulling the driving limit member 430 is shown in Figure 9 Compared with Figure 8 and Figure 9 , both the way of directly pulling the locking member 420 to slide the locking member 420 to open the locking slot 412 and the way of pulling the driving limit member 430 to slide the locking member 420 to open the locking slot 412 can smoothly open the locking slot 412. That is, the connection and disconnection are more convenient.

[0075] It should be noted that the "locked" as referred to herein includes both the case of the lock slot 412 being completely closed and the case of the lock slot 412 being only partially closed (i.e. the opening of the lock slot 412 is partially blocked), as long as the connection structure 30 cannot be disengaged from the lock slot 412. The case of the lock slot 412 being partially closed but the connection structure 30 can be disengaged from the lock slot 412 is not the "locked" state. The "open" as referred to herein includes both the case of the lock slot 412 being completely opened (i.e. the opening of the lock slot 412 is not blocked at all) and the case of the lock slot 412 being partially opened (i.e. the opening of the lock slot 412 is partially blocked), as long as the connection structure 30 can be disengaged from the lock slot 412. The case of the lock slot 412 being partially opened but the connection structure 30 cannot be disengaged from the lock slot 412 is not the "open" state.

[0076] The plurality of connection structures 30 are disengaged from the plurality of connection members 410 at the same time, so that the implant 1 has better coaxiality at the implantation site, i.e. the implant 1 does not deflect or decenter at the implantation site.

[0077] In an embodiment, the driving limiting member 430 has shape memory characteristics or elasticity, and in the process of the locking member 420 being subjected to an external force and sliding along the axial direction of the corresponding connection member 410 to the first direction F1, the locking member 420 acts on the driving limiting member 430 to cause the driving limiting member 430 to deform. When the external force disappears, the driving limiting member 430 restores the deformation to drive the locking member 420 to slide in the second direction F2.

[0078] Please refer back to Figure 4 , one end of the driving limiting member 430 extends into the inner cavity of the connection member 410 and extends to the proximal end along the axial direction of the connection member 410 and then extends to the outside of the connection member 410. When the lock slot 412 is in the locked state, the other end of the driving limiting member 430 abuts against the locking member 420, and the driving limiting member 430 has a first abutting portion 431 and a second abutting portion 432 abutting against the locking member 420, and the first abutting portion 431 and the second abutting portion 432 are opposite in the axial direction. The first abutting portion 431 is located proximally to the second abutting portion 432.

[0079] The first abutting portion 431 abuts against the locking member 420, so that when the locking member 420 is not subjected to an external force, the first abutting portion 431 abuts the locking member 420 at a position covering the lock slot 412, so that the lock slot 412 remains in the locked state, to avoid the connection structure 30 being disengaged from the connection member 410 too early.

[0080] The second abutting portion 432 abuts against the locking member 420, so that when it is necessary to release the implant 1, pulling the driving limiting member 430 in the first direction F1 can drive the locking member 420 to slide in the axial direction of the connection member 410 to the first direction F1, thereby opening the lock slot 412 and releasing the implant 1.

[0081] Please refer toFigure 10 The driving limiting piece 430 is substantially linear. In an embodiment, the driving limiting piece 430 comprises, from far to near, a driving segment 433, a limiting segment 434, a deformation segment 435 and a pulling segment 436.

[0082] In the embodiment, the driving segment 433 is linear, the limiting segment 434 is arc-shaped, the deformation segment 435 and the pulling segment 436 are linear. In the natural state, the driving segment 433 extends in a direction perpendicular to the extension direction of the longitudinal central axis of the connecting piece 410, the limiting segment 434 extends radially outward from one end connected with the driving segment 433 and then bends radially inward, the pulling segment 436 extends in the axial direction, and the deformation segment 435 is inclined from one end connected with the limiting segment 434 to the pulling segment 436.

[0083] In an embodiment, the number of the driving segment 433, the limiting segment 434, the deformation segment 435 and the pulling segment 436 is two, and one end of each driving segment 433 distal to the corresponding limiting segment 434 is connected with one end of the other driving segment 433 distal to the corresponding limiting segment 434. The connection manner is mastered by those skilled in the art, including but not limited to welding, bonding and the like. Alternatively, the two driving segments 433, the two limiting segments 434, the two deformation segments 435 and the two pulling segments 436 are integrated. For example, a wire with shape memory characteristics or elasticity is shaped to form the driving limiting piece 430. Specifically, a nickel-titanium alloy wire is shaped to form the driving limiting piece 430.

[0084] The first abutting portion 431 of the driving limiting piece 430 is located at the limiting segment 434 or the intersection of the limiting segment 434 and the deformation segment 435. The second abutting portion 432 is located at the driving segment 433 or the intersection of the driving segment 433 and the limiting segment 434.

[0085] Please refer back to Figure 4 The locking piece 420 is provided with a slide rail 421 extending in the axial direction of the locking piece 420. The axial length of the slide rail 421 is less than the axial length of the locking piece 420, and the distal end of the slide rail 421 is located proximal to the distal end of the locking piece 420, and the proximal end of the slide rail 421 is located distal to the proximal end of the locking piece 420. Please refer back to Figure 5 The body 411 of the connecting piece 410 is provided with a guide rail 413 extending in the axial direction of the body 411. The guide rail 413 is located proximal to the locking groove 412, and the proximal end of the guide rail 413 is located distal to the proximal end of the body 411. The guide rail 413 is a through hole penetrating the side wall of the body 411.

[0086] Please continue to refer to Figure 4When the locking member 420 is sleeved on the connecting member 410, and the locking groove 412 is in the locked state, the slide rail 421 of each locking member 420 is axially opposite to the guide rail 413 of the corresponding connecting member 410, and the slide rail 421 and the guide rail 413 are at least partially radially opposite.

[0087] Please refer to Figure 4 and Figure 10 , the end of the driving section 433 of the driving limiting member 430 away from the corresponding limiting section 434 extends into the slide rail 421, the deformed section 435 away from the corresponding limiting section 434 extends into the inner cavity of the connecting member 410 from the guide rail 413, and the pulling section 436 extends into the inner cavity of the connecting member 410 and extends to the outside of the connecting member 410 along the axial direction.

[0088] In an embodiment, the first abutting portion 431 abuts against the proximal end of the locking member 420, and the second abutting portion 432 abuts against the proximal inner wall of the slide rail 421.

[0089] In another embodiment, as shown in Figure 4 , the locking member 420 is provided with an avoidance hole 422 extending through the side wall of the locking member 420, the avoidance hole 422 is located at the proximal end of the slide rail 421, and the avoidance hole 422 and the slide rail 421 extend along the same straight line, but the avoidance hole 422 and the slide rail 421 are not axially communicated. The avoidance hole 422 extends from one end close to the slide rail 421 to the proximal end of the locking member 420 along the axial direction, and the avoidance hole 422 is a U-shaped avoidance hole, and the opening of the U-shaped avoidance hole is located at the proximal end of the locking member 420.

[0090] The first abutting portion 431 of the driving limiting member 430 abuts against the bottom wall (i.e. the bottom of the U-shaped) of the avoidance hole 422, and the second abutting portion 432 abuts against the proximal inner wall of the slide rail 421.

[0091] In an embodiment, when the number of the driving section 433, the limiting section 434, the deformed section 435 and the pulling section 436 is two, the number of the slide rail 421 is two, and the two slide rails 421 are located on the radially opposite sides of the longitudinal center axis of the locking member 420. The number of the guide rail 413 is two, and the two guide rails 413 are located on the radially opposite sides of the longitudinal center axis of the connecting member 410. The two slide rails 421 correspond to the two guide rails 413 one by one. The two driving sections 433 are correspondingly arranged with the two slide rails 421, the two limiting sections 434 are correspondingly arranged with the two slide rails 421, and the two deformed sections 435 are correspondingly arranged with the two guide rails 413.

[0092] The ends of the two driving sections 433 away from the corresponding limiting sections 434 respectively extend into the two slide rails 421 and are connected; or, the ends of the two driving sections 433 away from the corresponding limiting sections 434 respectively extend into the two slide rails 421 but are not connected.

[0093] It can be understood that the two driving segments 433 extend into the two sliding rails 421 respectively at the end away from the corresponding limiting segments 434, and the sliding rails 421 are through-hole structures when the two driving segments 433 are connected, i.e., the sliding rails 421 pass through the side wall of the locking member 420 in the radial direction, and the end of each driving segment 433 away from the limiting segment 434 passes through the sliding rail 421 and the guide rail 413 in the radial direction in turn, and the connecting end of the two driving segments 433 is located in the inner cavity of the connecting member 410.

[0094] In the state shown in FIG. 4A, the driving limiting member 430 is in a natural state, i.e., the state shown in FIG. 4B. In this state, the radial distance between the end of each deforming segment 435 connected to the corresponding pulling segment 436 is smaller than the radial distance between the end of each deforming segment 435 away from the pulling segment 436. Figure 4 Figure 10 When it is necessary to connect the implant 1, the locking member 420 is directly acted on while keeping the driving limiting member 430 relatively static with respect to the connecting member 410, so that the locking member 420 slides along the connecting member 410 in the first direction F1 to open the locking slot 412. During the sliding of the locking member 420 in the first direction F1, the locking member 420 acts on the driving limiting member 430, so that the radial distance between the end of each deforming segment 435 connected to the corresponding pulling segment 436 of the driving limiting member 430 increases, i.e., each deforming segment 435 is deformed. When the position of the locking member 420 corresponds to the state in which the locking slot 412 is open, each deforming segment 435 is radially stretched, as shown in FIG. 4C.

[0095] When the connecting structure 30 of the implant 1 is inserted into the locking slot 412, the force acting on the locking member 420 is removed, and the driving limiting member 430 is restored from the state shown in FIG. 4D to the state shown in FIG. 4B, and the locking member 420 is driven to move in the second direction F2 to lock the locking slot 412. Figure 11 Figure 11 Figure 10 In another embodiment, the two driving segments 433 extend into the two sliding rails 421 respectively at the end away from the corresponding limiting segments 434, and are located inside the locking member 420. The two driving segments 433 are not connected at the end away from the corresponding limiting segments 434. Moreover, as shown in FIG. 4E, the end of each driving segment 433 away from the limiting segment 434 is provided with a limiting portion 437, the limiting portion 437 is located inside the locking member 420, and the radial dimension of the limiting portion 437 is greater than the width of the sliding rail 421, so as to avoid the driving limiting member 430 from falling off the locking member 420. In this embodiment, the limiting portion 437 is a spherical structure. It can be understood that in other embodiments, the limiting portion 437 is not limited to a spherical structure, and other structures capable of avoiding the driving limiting member 430 from falling off the locking member 420 are also available.

[0096] In another embodiment, the two driving segments 433 extend into the two sliding rails 421 respectively at the end away from the corresponding limiting segments 434, and are located inside the locking member 420. The two driving segments 433 are not connected at the end away from the corresponding limiting segments 434. Moreover, as shown in FIG. 4E, the end of each driving segment 433 away from the limiting segment 434 is provided with a limiting portion 437, the limiting portion 437 is located inside the locking member 420, and the radial dimension of the limiting portion 437 is greater than the width of the sliding rail 421, so as to avoid the driving limiting member 430 from falling off the locking member 420. In this embodiment, the limiting portion 437 is a spherical structure. It can be understood that in other embodiments, the limiting portion 437 is not limited to a spherical structure, and other structures capable of avoiding the driving limiting member 430 from falling off the locking member 420 are also available. Figure 12

[0097] ​​​​It should be noted that when the two driving segments 433 are not connected at the ends away from the corresponding limiting segments 434, in the natural state, the connection mode of each deformation segment 435 with the corresponding limiting segment 434 and the pulling segment 436 is the same as that when the two driving segments 433 are connected at the ends away from the corresponding limiting segments 434, that is, each deformation segment 435 is inclined from the end connected with the corresponding limiting segment 434 to the corresponding pulling segment 436. When the lock slot 412 is in the open state, the two deformation segments 435 are radially separated; the two deformation segments 435 are driven to slide the locking piece 420 in the second direction F2 in the process of recovering from the radially separated state to the initial state.

[0098] In addition, in an embodiment, whether the two driving segments 433 corresponding to the ends away from the corresponding limiting segments 434 are connected or not, the two pulling segments 436 corresponding to the ends away from the deformation segments 435 can be connected or not.

[0099] It should be further noted that in other embodiments, the driving limiting piece 430 can only include one driving segment 433, one limiting segment 434, one deformation segment 435 and one pulling segment 436. For example, Figure 12 The structure shown constitutes a complete driving limiting piece 430. Correspondingly, the slide rail 421 and the guide rail 413 are each one.

[0100] Please refer to Figure 13 In another embodiment, the driving limiting piece 430 includes one deformation segment 437, two transition segments 438 and two pulling segments 439. The two transition segments 438 are respectively connected with the two ends of the deformation segment 437, and the two ends of the two pulling segments 439 are respectively connected with the ends of the two transition segments 438 away from the deformation segment 437. The deformation segment 437 extends substantially radially. Please refer to Figure 14 In the natural state, the deformation segment 437 is partially located outside the connecting piece 410 and partially located in the connecting piece 410. The deformation segment 437 is an arc-shaped curved rod, has a first curved portion 4371 located in the middle and two second curved portions 4372 respectively connected with the two ends of the first curved portion 4371, and the first curved portion 4371 is located in the inner cavity of the connecting piece 410. The two pulling segments 439 extend axially towards the proximal end in the inner cavity of the connecting piece 410 and extend to the outside of the connecting piece 410, and each transition segment 438 is inclined from the end connected with the deformation segment 437 to the pulling segment 439. In the natural state, the radial distance between the ends of the two transition segments 438 close to the pulling segment 439 is smaller than the radial distance between the ends away from the pulling segment 439.

[0101] Please refer to Figure 15In one embodiment, the inner wall of the locking member 420 is provided with a groove 423. The opening of the groove 423 is towards the longitudinal central axis of the locking member 420. In one embodiment, the groove 423 is a strip-shaped groove with a gradually decreasing groove depth from the proximal end to the distal end, and the number of the groove 423 is two, which are symmetric along the longitudinal central axis of the locking member 420. In another embodiment, the groove 423 is a ring-shaped groove, and the groove depth of the groove 423 gradually decreases from the proximal end to the distal end.

[0102] Please refer back to Figure 14 , the locking member 420 is sleeved on the connecting member 410 and the driving limiting member 430. When the locking groove 412 is covered by the locking member 420 and is in the locked state, the two second bending portions 4372 of the driving limiting member 430 abut against the groove bottom of the proximal end of the groove 423.

[0103] While keeping the connecting member 410 and the driving limiting member 430 relatively static, the locking member 420 is acted on to slide along the connecting member 410 in the first direction F1 to open the locking groove 412. As shown in Figure 16 , in this state, the two second bending portions 4372 of the driving limiting member 430 abut against the groove bottom of the distal end of the groove 423. Since the groove depth of the groove 423 gradually decreases from the proximal end to the distal end, compared with Figure 14 the state of the driving limiting member 430 when the locking groove 412 is locked, at this time, the deformed segment 437 of the driving limiting member 430 is radially extruded, and the first bending portion 4371 and the two second bending portions 4372 are further bent. In this state, the connecting structure 30 of the implant 1 is connected with the connecting member 410. Then, the locking member 420 is loosened, the deformed segment 437 restores the deformation to drive the locking member 420 to slide along the connecting member 410 in the second direction F2 to lock the locking groove 412. That is, the connection state of the connecting member 410, the locking member 420 and the driving limiting member 430 returns to the state shown in Figure 14 .

[0104] When the implant 1 is to be released, the driving limiting member 430 is pulled in the first direction F1, the two second bending portions 4372 of the driving limiting member 430 abut against the groove bottom of the groove 423, and the deformed segment 437 is abutted by the proximal end side wall of the groove 423, so that the driving limiting member 430 can drive the locking member 420 to slide in the first direction F1 to open the locking groove 412, as shown in Figure 17 . Thus, the implant 1 can be released.

[0105] It should be noted that, Figure 13 in the embodiment shown in

[0106] Please refer back toFigure 4 In one embodiment, the guide rail 413 and the slide rail 421 are both strip-shaped structures. In another embodiment, the guide rail 413 comprises a strip-shaped rail and a semicircular portion at the distal end of the strip-shaped rail. The slide rail 421 comprises a strip-shaped portion and a semicircular portion at the proximal end of the strip-shaped portion. The driving limiting member 430 is shaped by a wire with a circular cross section, and the semicircular portions are arranged at the distal end of the guide rail 413 and the proximal end of the slide rail 421, respectively, and the diameter of the cross section of the driving limiting member 430 is adapted to the diameter of the semicircular portions and the size of the bottom of the avoiding hole 422, so that the limiting section 434 and the driving section 433 of the driving limiting member 430 can better abut against the connecting member 410 and the locking member 420, so that the locking member 420 can be smoothly pulled to open the locking groove 412 in the releasing process, and the locking member 420 can be better limited in the conveying process, so that the implant 1 and the connecting device 40 can be reliably connected.

[0107] Please refer to Figure 18 In one embodiment, the guide rail 413 comprises an axial guide rail 4131 and a radial protruding portion 4132 in communication with the guide rail 4131, and the distance between the distal end of the radial protruding portion 4132 and the distal end of the guide rail 4131 is greater than zero. The guide rail 4131 comprises a strip-shaped rail and two semicircular portions at the two ends of the strip-shaped rail, respectively. The radial protruding portion 4132 comprises a rectangular portion extending radially connected with the strip-shaped rail of the guide rail 4131 and a semicircular portion connected with one end of the rectangular portion away from the strip-shaped rail.

[0108] Please refer to Figure 19 The slide rail 421 extends axially and obliquely. The slide rail 421 has a distal end 421A and a proximal end 421B, and the projection of the distal end 421A on the plane where the proximal end 421B is located and perpendicular to the longitudinal center axis of the locking member 420 does not coincide with the proximal end 421B. In this embodiment, the slide rail 421 comprises a strip-shaped portion extending axially and obliquely and two semicircular portions at the two ends of the strip-shaped portion, respectively. The distal end of the distal semicircular portion is the distal end 421A, and the proximal end of the proximal semicircular portion is the proximal end 421B.

[0109] Please refer to Figure 20 When the locking groove 412 is in the locked state, the driving limiting member 430 abuts against the inner wall of the proximal end of the slide rail 421, i.e., the arc-shaped inner wall of the proximal semicircular portion. Please refer to Figure 18 , Figure 20 and Figure 21, the radial protrusion 4132 of the guide rail 413 is located proximally to the proximal end surface of the locking member 420. That is, in this state, the radial protrusion 4132 is not covered by the locking member 420. At this time, the distal end surface of the driving stopper 430 is located distally to the distal end of the radial protrusion 4132. That is, the driving section 433 is located axially distally to the distal end of the radial protrusion 4132.

[0110] In this state, when the driving stopper 430 is kept relatively static with respect to the connecting member 410, the slide rail 421 cooperates with the driving stopper 430 to form a double limit to the locking member 420, because the projection of the distal end 421A of the slide rail 421 on the plane in which the proximal end 421B is located and which is perpendicular to the longitudinal central axis of the locking member 420 does not coincide with the proximal end 421B, and Figure 20 In the state shown in Fig. 6, the locking member 420 cannot be slid in the first direction F1 to open the locking slot 412.

[0111] When the locking slot 412 is to be opened to connect the implant 1, the driving stopper 430 is first pulled in the first direction F1 to axially move the driving stopper 430 with respect to the connecting member 410, and under the driving of the driving stopper 430, the locking member 420 is slid in the first direction F1. Please refer to Figs. 7 and 8. Figure 22 and Figure 23 When the locking member 420 is slid to cover the radial protrusion 4132, and the radial position of the driving section 433 of the driving stopper 430 is aligned with the radial protrusion 4132, so that the driving section 433 can enter the radial protrusion 4132 under the force, the pulling of the driving stopper 430 is stopped. At this time, the locking slot 412 is partially exposed, but the locking slot 412 is not opened to the extent of the open state.

[0112] Further, the relative position between the driving stopper 430 and the connecting member 410 at this moment exerts a force on the locking member 420 to pull the locking member 420 in the first direction F1. Since the radial position of the driving section 433 of the driving stopper 430 is aligned with the radial protrusion 4132 at this time, the locking member 420 is driven to enter the radial protrusion 4132 during the sliding in the first direction F1, so as to overcome the limiting action of the driving stopper 430 and be able to slide along the connecting member 410 in the first direction F1 to open the locking slot 412, as shown in Figs. 9 and 10. Figure 24 and Figure 25

[0113] In the state shown in Fig. 6, the locking member 420 cannot be slid in the first direction F1 to open the locking slot 412. Figure 24 In the state shown in Fig. 6, the locking member 420 cannot be slid in the first direction F1 to open the locking slot 412. Figure 22 ​In the state shown, the second direction F2 sliding cannot be continued. At this time, although the lock slot 412 is not completely closed, the degree of partial closure is such that the implant 1 will not fall off the connecting piece 410. That is, at this time, the lock slot 412 is in a locked state. Thus, when the plurality of connecting pieces 410 are connected to the plurality of connecting structures 30 of the implant 1 in turn, the connecting structure 30 that has been connected previously can be prevented from falling off the connecting piece 410, and thus the connection can be completed at one time without the need for reconnection due to falling off. Moreover, the connection is convenient and can be operated independently by one person.

[0114] Finally, in order to completely close the lock slot 412, the plurality of driving limit pieces 430 are simultaneously pushed in the second direction F2. Due to the abutment of the first abutment portion 431 and the locking piece 420, the plurality of driving limit pieces 430 respectively drive the plurality of locking pieces 420 to slide in the second direction F2 to a position where the locking piece 420 completely covers the lock slot 412, returning to the state shown in Figure 20 .

[0115] When the implant 1 is to be released, the plurality of driving limit pieces 430 are simultaneously pulled in the first direction F1 to respectively drive the plurality of locking pieces 420 to simultaneously slide in the first direction F1, thereby simultaneously opening the plurality of lock slots 412, as shown in Figure 26 and Figure 27 . Thus, the plurality of connecting structures 30 of the implant 1 are simultaneously released.

[0116] The slide rail 421 extending in the axial direction and having a distal end portion 421A whose projection on the plane where the proximal end portion 421B is located and perpendicular to the longitudinal central axis of the locking piece 420 does not coincide with the proximal end portion 421B cooperates with the guide rail 413 including the guide rail 4131 and the radial protruding portion 4132, and still enables the driving limit piece 430 to automatically drive the locking piece 420 to slide to a position where the lock slot 412 is in a locked state when the locking piece 420 is loosened after the connecting structure 30 is at least partially placed in the lock slot 412, thereby avoiding the falling off of the connecting structure 30 and making the connection more reliable and convenient. Moreover, the plurality of connecting structures 30 and the plurality of connecting pieces 410 can be simultaneously released, which is more convenient.

[0117] Meanwhile, the cooperation of the slide rail 421 and the guide rail 413 enables the lock slot 412 to cooperate with the driving limit piece 430 to form double limiting of the locking piece 420 when the locking piece 420 is in a state of completely covering the lock slot 412, thereby further improving the reliability of the connection and avoiding the locking piece 420 from sliding in the first direction F1 due to an unexpected force during transportation, thereby avoiding premature release. Figure 20 Thus, when the driving limit piece 430 and the connecting piece 410 remain relatively stationary, the locking piece 420 cannot slide in the first direction F1 to open the lock slot 412. Thus, the reliability of the connection is further improved, and the locking piece 420 is prevented from sliding in the first direction F1 due to an unexpected force during transportation, thereby avoiding premature release.

[0118] In other embodiments, the shape of the slide rail 421 is not limited to Figure 19 The shape shown can be other shapes that meet the requirements of extending in the axial direction and the projection of the distal end 421A on the plane where the proximal end 421B is located and perpendicular to the longitudinal center axis of the locking member 420 does not coincide with the proximal end 421B; and other shapes of the slide rail 421 that can be slid along the connecting member 410 in the first direction F1 when the driving segment 433 is radially aligned with the radial protrusion 4132.

[0119] For example, as shown in Figure 28 and Figure 29 In other embodiments, the slide rail 421 is an arc-shaped rail, and the center of the arc-shaped rail can be located on the left side or the right side of the arc-shaped rail.

[0120] Please refer to Figure 21 , the axial length of the slot bottom 4121 of the locking slot 412 is Y1, the axial distance from the connection position of the separation surface 4123 and the slot bottom 4121 to the distal end surface of the connecting member 410 is Y2, the axial distance from the distal end of the strip-shaped rail of the guide rail 4131 to the distal end surface of the connecting member 410 is Y3, and the axial distance from the center position of the radial protrusion 4132 in the axial direction to the distal end of the strip-shaped rail is Y4. The radial distance from the center position of the guide rail 4131 in the radial direction to the end of the rectangular portion of the radial protrusion 4132 away from the guide rail 4131 is X1.

[0121] The axial length of the strip-shaped portion of the slide rail 421 is Y5, the axial distance from the connection position of the strip-shaped portion and the semicircular portion located on the proximal end to the distal end surface of the locking member 420 is Y6, and the radial distance from the center of the semicircular portion on the distal end of the slide rail 421 to the proximal end 421B is X2.

[0122] Please refer to Figure 20 and Figure 21 Y6≥Y3. When the driving limit member 430 is in abutment with the proximal end inner wall of the slide rail 421, and the driving segment 433 (not shown in the figure) is located at the distal end of the radial protrusion 4132, Y6 is equal to Y3, the distal end surface of the locking member 420 is flush with the distal end surface of the connecting member 410, and the locking slot 412 is completely covered by the locking member 420. When Y6>Y3, the distal end surface of the locking member 420 is located on the distal end of the distal end surface of the connecting member 410, and the locking slot 412 is completely covered by the locking member 420. Therefore, Y6≥Y3 is beneficial to the reliable connection of the implant 1 and the connecting member 410.

[0123] Please refer to Figure 22 and Figure 23Y2+Y6>Y3+Y4, so that when the driving limiting piece 430 abuts against the inner wall of the proximal end of the slide rail 421 and the driving section 433 is radially aligned with the radial protrusion 4132, the locking piece 420 can cover most of the opening of the locking slot 412 or completely cover the locking slot 412, even if the locking slot 412 is in the locked state, so that the connection structure 30 of the implant 1 cannot be disengaged from the connecting piece 410 in the state that the driving section 433 is radially aligned with the radial protrusion 4132.

[0124] Please refer to Figure 24 and 25 Y6-Y5 Figure 22 to the state shown in Figure 24 , the locking slot 412 is in a completely open state (i.e., the most open state), that is, the locking slot 412 can be smoothly opened to facilitate connection with the implant 1.

[0125] Please refer to Figure 26 and Figure 27 X1 / X2*Y5+Y4+Y3>Y1+Y2+Y6, so that when the driving limiting piece 430 is pulled in the first direction F1, the locking piece 420 slides from the state shown in Figure 20 to the state shown in Figure 26 , the locking slot 412 is in a completely open state (i.e., the most open state), that is, the locking slot 412 can be smoothly opened to smoothly release the implant 1.

[0126] It should be noted that the locking slot 412 in the locked state can be that the locking piece 420 completely covers the axial interval segment where the locking slot 412 is located in the circumferential direction. For example, as shown in Figure 4 , the locking piece 420 completely covers the axial interval segment where the locking slot 412 is located. Figure 15 In other embodiments, the locking piece 420 can only cover the opening of the locking slot 412 in the circumferential direction, without covering other regions of the axial interval segment where the locking slot 412 is located. For example, as shown in .

[0127] In an embodiment, the locking piece 420 is a sleeve structure, and the slide rail 421 is formed on the side wall of the sleeve structure. In another embodiment, the locking piece 420 is a sleeve structure with a partially cut region, as shown in Figure 15 .

[0128] Please refer to Figure 30In another embodiment, the locking member 420 comprises a cover portion 423 and an extension portion 424 connected to the cover portion 423, the extension portion 424 extends from the end connected to the cover portion 423 to the proximal end, and the slide rail 421 is arranged on the extension portion 424. The cover portion 423 is an arc-shaped shell for covering the opening of the locking slot 412. In other embodiments, the cover portion 423 can be in the form of a sleeve. In this embodiment, in the locked state, the driving limiting member 430 abuts against the inner wall of the proximal end of the slide rail 421 and the proximal end of the extension portion 424. The number of the extension portions 424 corresponds to the number of the slide rails 421, which can be two or one.

[0129] Please go back to Figure 4 In an embodiment, the connecting structure 40 further comprises a first connecting base 440, a second connecting base 450, and a driving tube 460.

[0130] The first connecting base 440 is sleeved and fixed on the inner tube 20. The proximal ends of the plurality of connecting members 410 are fixedly connected to the first connecting base 440. The plurality of connecting members 410 are arranged at intervals along the circumference of the first connecting base 440.

[0131] The second connecting base 450 is located at the proximal end of the first connecting base 440, the proximal end of the second connecting base 450 is connected to the distal end of the driving tube 460, and the second connecting base 450 and the driving tube 460 are movably sleeved on the inner tube 20. The pulling section 436 of the driving limiting member 430 extends from the proximal end of the main body 411 of the corresponding connecting member 410 and extends axially to the second connecting base 450, and is fixedly connected to the second connecting base 440.

[0132] By arranging the first connecting base 440, the plurality of connecting members 410 can be conveniently connected to the inner tube 20. The diameter of the circumscribed circle of the plurality of connecting members 410 is less than or equal to the diameter of the circumscribed circle of the first connecting base 440, so as to avoid that the radial profile of the conveyor 2 is too large.

[0133] By arranging the second connecting base 450 and the driving tube 460, the plurality of driving limiting members 430 can be simultaneously adjusted by pulling or pushing the driving tube 460, so as to simultaneously release the plurality of connecting structures 30 of the implant 1 or simultaneously drive the plurality of locking members 420 to slide in the second direction F2.

[0134] In an embodiment, the opening of the locking slot 412 of each connecting member 410 is radially outward, which on one hand facilitates the connection with the implant 1 and avoids that the plurality of connecting members 410 block each other during the connection process, and on the other hand avoids that the plurality of connecting structures 30 interfere with each other during the release process, so that the release of the plurality of connecting structures 30 and the corresponding plurality of connecting members 410 can be smoothly performed, thereby smoothly releasing the implant 1.

[0135] Please go back toFigure 3 In an embodiment, the delivery device 2 further comprises a handle assembly 80. The handle assembly 80 comprises a guide rail 810, a movable handle 820, a fixed handle 830 and a release actuator 840.

[0136] The proximal end of the outer tube 60 extends into the guide rail 810, and the movable handle 820 is movably sleeved on the guide rail 810. The movable handle 820 is fixedly connected with the outer tube 60, and the movable handle 820 can slide along the guide rail 810 in the axial direction to drive the outer tube 60 to slide in the axial direction, so as to accommodate the radially compressed implant 1 or release the radially compressed implant 1 to a partially radially expanded state.

[0137] The proximal end of the drive tube 460 extends in the axial direction and extends out of the proximal end of the guide rail 810 to be connected with the release actuator 840. The release actuator 840 can slide in the axial direction relative to the guide rail 810 in two opposite directions to pull or push the drive tube 460, so as to pull or push the drive stopper 430.

[0138] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0139] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the present application. Therefore, any equivalent changes made according to the claims of the present application shall be considered as the scope of the present application.

Claims

1. A connecting device for connecting an implant in a delivery system, characterized in that, include: Multiple connectors, multiple locking components, and multiple drive limiting components are provided, wherein the multiple locking components are configured in a one-to-one correspondence with the multiple connectors, the multiple drive limiting components are configured in a one-to-one correspondence with the multiple locking components, and the multiple connectors are configured in a one-to-one correspondence with the multiple drive limiting components. Each connector has a locking groove at its distal end. When the locking groove is in the locked state and the driving limiting member is relatively stationary with respect to the corresponding connector, under the action of an external force, each locking member can independently slide along the axial direction of the corresponding connector in a first direction to open the locking groove. When the external force disappears, the corresponding driving limiting member drives the locking member to slide along the axial direction of the connector in a second direction opposite to the first direction to lock the locking groove, and the locking member is limited by the corresponding driving limiting member in the first and second directions. When the plurality of driving limiting members can be acted simultaneously and moved along the plurality of connecting members in the first direction, they can simultaneously drive the plurality of locking members to slide along the plurality of connecting members in the first direction to open the locking groove.

2. The connecting device according to claim 1, characterized in that, The driving limiting member has shape memory characteristics or elasticity. When the driving limiting member and the corresponding connecting member are relatively stationary, during the process of the locking member sliding along the axial direction of the corresponding connecting member in the first direction under the action of external force, the driving limiting member deforms. When the external force disappears, the driving limiting member restores its deformation and drives the locking member to slide in the second direction.

3. The connecting device according to claim 1, characterized in that, The connector has an inner cavity, and each locking member is movably sleeved on the corresponding connector. One end of the driving limiting member extends into the inner cavity of the corresponding connector and extends along the axial direction of the connector to protrude outside the connector. When the locking groove is in the locked state, the other end of the driving limiting member abuts against the locking member, and the driving limiting member and the locking member form a first abutting part and a second abutting part that are axially opposite each other.

4. The connecting device according to claim 1, characterized in that, The opening of the locking groove faces the radially outward side of the connector. When the locking member slides to cover the opening in the circumferential direction, the locking groove is in a locked state; when the locking member slides to expose the opening in the circumferential direction, the locking groove is in an open state.

5. The connecting device according to claim 4, characterized in that, The locking groove includes a groove bottom, a pushing surface, and a separating surface. The pushing surface and the separating surface are located on opposite axial sides of the groove bottom, and the separating surface is located at the far end of the pushing surface. The groove bottom is parallel to the longitudinal central axis of the connector. The pushing surface and the groove bottom form a first angle, the first angle being 80° to 100°. The separating surface and the groove bottom form a second angle, the second angle being 30° to 60°.

6. The connecting device according to claim 3, characterized in that, Each of the locking members has a slide rail, and each of the connecting members has a guide rail. When the locking groove is in the locked state, the slide rail and the guide rail are at least partially opposite each other in the radial direction. The driving limiting member includes a driving section, a limiting section, a deformation section, and a pulling section connected in sequence from far to near. The end of the driving section away from the limiting section extends into the slide rail. The end of the deformation section away from the limiting section extends into the inner cavity of the connecting member through the guide rail. The pulling section extends axially in the inner cavity of the connecting member to protrude outside the connecting member. The driving section and the limiting section abut against the locking member to form a first abutting part and a second abutting part that are opposite each other in the axial direction.

7. The connecting device according to claim 6, characterized in that, The number of slide rails and guide rails is two in each case. The two slide rails are located on two radially opposite sides of the longitudinal central axis of the locking member, and the two guide rails are located on two radially opposite sides of the longitudinal central axis of the connecting member. The two slide rails correspond one-to-one with the two guide rails. The number of driving sections, limiting sections, deformation sections, and pulling sections is two in each case. The two limiting sections are respectively set to correspond to the two slide rails, the two deformation sections are respectively set to correspond to the two guide rails, and the two driving sections are respectively set to correspond to the two slide rails. The ends of the two driving sections that are away from the corresponding limiting sections extend into the two slide rails and are connected; or, the ends of the two driving sections that are away from the corresponding limiting sections extend into the two slide rails but are not connected.

8. The connecting device according to claim 7, characterized in that, When the ends of the two drive segments that are away from the corresponding limiting segments extend into the two slide rails respectively and are not connected, each drive segment has a limiting part at the end that is away from the corresponding limiting segment. The limiting part is located inside the locking member, and the radial dimension of the limiting part is greater than the width of the slide rail.

9. The connecting device according to claim 1, characterized in that, Each locking member has a groove on its inner wall, the opening of the groove facing the longitudinal central axis of the locking member, and the groove depth gradually decreasing from the proximal end to the distal end. Each connecting member has two guide rails located on opposite sides of the longitudinal central axis of the connecting member. The driving limiting member includes a pulling section, a deformation section, and two transition sections. The two ends of the deformation section are respectively connected to the two transition sections. The pulling section is connected to the end of the two transition sections away from the deformation section. The deformation section passes radially through the connecting member. The pulling section extends axially from the inner cavity of the connecting member to the outside of the connecting member. The locking member is movably sleeved on the connecting member and the driving limiting member, and the two ends of the deformation section abut against the bottom of the groove.

10. The connecting device according to claim 6, characterized in that, The locking member is a sleeve structure, and the slide rail is formed on the side wall of the sleeve structure; or, the locking member includes a cover portion and an extension portion connected to the cover portion, the extension portion extending axially from one end connected to the cover portion to the proximal end, and the slide rail is formed on the extension portion, the cover portion being a collar structure or an arc-shaped shell.

11. The connecting device according to claim 6, characterized in that, The guide rail includes an axially extending guide rail and a radial protrusion communicating with the guide rail, and the distance between the distal end of the radial protrusion and the distal end of the guide rail is greater than zero; the slide rail extends axially and has a distal end and a proximal end, and the projection of the distal end on the plane where the proximal end is located and which is perpendicular to the longitudinal central axis of the locking member does not coincide with the proximal end; When the locking groove is in the locked state, the driving limiting member abuts against the proximal inner wall of the slide rail, and the driving section is located at the distal end of the radial protrusion. The locking groove cooperates with the driving limiting member to limit the locking member, so that when the driving limiting member and the corresponding connecting member remain relatively stationary, the locking member cannot slide along the connecting member in the first direction.

12. The connecting device according to claim 11, characterized in that, When the drive limiting member is pulled in the first direction to cause the locking member to slide in the first direction until the drive segment and the radial protrusion are radially aligned, the locking groove is partially opened but the locking groove is still in the locked state; in this state, the drive limiting member and the corresponding connecting member are kept relatively stationary, and the locking member is acted upon to make the locking member slide in the first direction to open the locking groove; when the locking groove is in the open state, the drive segment abuts against the distal inner wall of the slide rail.

13. The connecting device according to claim 11, characterized in that, The axial length of the bottom of the locking groove is Y1, the axial distance from the connection point between the locking groove's separating surface and the bottom of the groove to the distal end face of the connector is Y2, the guide rail includes an axially extending strip rail and a semicircular portion connected to the distal end of the strip rail, the axial distance from the distal end of the strip rail to the distal end face of the connector is Y3, the axial distance from the center position of the radial protrusion to the distal end of the strip rail is Y4, the slide rail includes a strip portion and two semicircular portions respectively connected to both ends of the strip portion, the axial length of the strip portion is Y5, and the axial distance from the connection point between the strip portion and the proximal semicircular portion to the distal end face of the locking member is Y6; Y1, Y2, Y3, Y4, Y5, and Y6 satisfy the following relationship: Y6≥Y3; Y2+Y6>Y3+Y4; Y6-Y5<Y3+Y4-Y1-Y2.

14. The connecting device according to claim 13, characterized in that, The radial protrusion includes a rectangular portion connected to the guide rail and a semicircular portion connected to the rectangular portion. The radial distance from the center of the guide rail to the end of the rectangular portion away from the guide rail is X1, and the radial distance from the center of the semicircular portion at the far end of the slide rail to the proximal end is X2. Y1, Y2, Y3, Y4, Y5, and Y6 satisfy the following relationship with X1 and X2: X1 / X2*Y5+Y4+Y3>Y1+Y2+Y6.

15. A connecting device for connecting an implant in a delivery system, characterized in that, include: Multiple connectors, each connector having a locking groove at its distal end, and each connector having a guide rail, the guide rail including an axially extending guide rail and a radial protrusion communicating with the guide rail; Multiple locking components correspond one-to-one with the multiple connecting components. Each locking component is sleeved on the corresponding connecting component, and each locking component is provided with a slide rail that extends obliquely along the axial direction of the locking component. Multiple driving limiting components correspond one-to-one with the multiple locking components, and the multiple connecting components also correspond one-to-one. The distal end of each driving limiting component is radially inserted through the slide rail of the corresponding locking component, and the proximal end extends along the axial direction of the corresponding connecting component. When the locking groove is in the locked state, the distal end face of the driving limiting member is located at the distal end of the distal end face of the radial protrusion, and the proximal end inner wall of the driving limiting member and the slide rail abuts against the proximal end of the locking member. The locking groove cooperates with the driving limiting member to limit the locking member in the first and second axially opposite directions. When the driving limiting member moves in the first direction until the far end of the driving limiting member is aligned radially with the radial protrusion, the locking member is slid in the first direction by an external force to open the locking groove. When the external force disappears, the corresponding driving limiting member drives the locking member to slide in the second direction opposite to the first direction to lock the locking groove. When the plurality of driving limiting members can be acted simultaneously and moved along the plurality of connecting members in the first direction, they can simultaneously drive the plurality of locking members to slide along the plurality of connecting members in the first direction to open the locking groove.

16. A conveyor, characterized in that, It includes an inner tube, an outer tube, and a connecting device as described in claim 1 or 15, wherein a plurality of connecting members of the connecting device surround the inner tube and are fixedly connected to the inner tube, and the outer tube is slidably sleeved on the connecting device and the inner tube along the axial direction.

17. A conveying system, characterized in that, The device includes an implant and a delivery device as described in claim 16, wherein the implant includes a plurality of connection structures, each of which is detachably connected to a plurality of connectors of the connection device.

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