Take-up mechanism for conveying device, conveying device and conveying system

Abstract

The invention relates to the technical field of medical instruments, in particular to a take-up mechanism for a conveying device, the conveying device and a conveying system. The take-up mechanism for the conveying device comprises a reversing piece connected with a shell, and the near end of a rope axially extends in the shell and is connected with the reversing piece so as to change the extending direction into the radial direction; the take-up piece can be used for fixing the rope with the changed extending direction; and the driving piece is connected with the shell, the driving piece is connected with the take-up piece, and the driving piece can drive the take-up piece to rotate around the longitudinal central axis of the shell so as to wind the rope. The take-up mechanism converts axial movement of the rope into radial rotation, so that the movable stroke of the free end of the rope is no longer determined by the axial size of the take-up mechanism, that is, the axial size of the take-up mechanism no longer limits the movable stroke of the free end of the rope, and the overall size of the conveying device can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a wire-collecting mechanism for a conveying device, a conveying device and a conveying system. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Patent foramen ovale (PFO) is a common congenital heart disease, which refers to the heart and blood vessel structure that exists in the embryonic period and should be closed after the baby is born, resulting in a malformation. Through the patent foramen ovale, blood clots may enter the left heart system and cause corresponding clinical symptoms such as unexplained headaches, dizziness or stroke. Therefore, treating the cause and closing the open foramen ovale in high-risk groups is expected to reduce the incidence of patients.

[0004] The traditional treatment for patent foramen ovale is surgery, but surgery has disadvantages such as high risk of complications, severe trauma, and high cost. Therefore, with the development of minimally invasive interventional technology, transcatheter interventional occluders have gradually become an important method for treating patent foramen ovale.

[0005] At present, the mainstream occluder in clinical practice is usually a double-disc structure, that is, it has two symmetrical occluding discs and a waist. The two occluding discs block the oval foramen from opposite sides of the foramen ovale respectively, and the waist connects the two occluding discs and is accommodated in the oval foramen. Among them, there is a double-disc occluder, whose waist is formed by a tightening line, which is passed through the first occluding disc and has two free ends. A knot is formed on one of the free ends of the tightening line, and the knot is located on the side of the second occluding disc away from the first occluding disc. The other free end of the tightening line is passed through the knot. The distance between the two occluding discs can be adjusted and fixed by pulling the free end of the tightening line.

[0006] However, currently, in the delivery device for delivering such an occluder, the process of pulling the free end of the tightening wire is achieved by axial movement of the slider, which requires the size of the handle to be set long enough to meet the movement requirements of the free end of the tightening wire when the movement stroke is longer due to individual differences, resulting in a larger overall size of the conveyor and inconvenient operation. Summary of the invention

[0007] Based on this, it is necessary to provide a wire taking-up mechanism for a conveying device that can reduce the axial size of the conveying device.

[0008] Furthermore, a conveying device with a smaller axial dimension is also provided.

[0009] Furthermore, a conveying system with a relatively small axial dimension is also provided.

[0010] A wire winding mechanism for a conveying device, the conveying device being used for conveying an implantable device, the conveying device including a housing, in a loaded state, the implantable device being connected to the housing by a wire rope, the wire winding mechanism including: a reversing member connected to the housing, the proximal end of the wire rope axially extending in the housing and connected to the reversing member, the reversing member allowing the wire rope to be wound around it to change the extending direction so that the wire rope extends in a radial direction; a wire winding member for fixing the wire rope after the extending direction is changed; and a driving member connected to the housing and connected to the wire winding member, the driving member being capable of driving the wire winding member to rotate around the longitudinal central axis of the housing to wind the wire rope.

[0011] In one embodiment, a mounting seat is provided on the housing, the wire winding member is rotatably connected to the mounting seat, the wire winding member can rotate around its own central axis on the mounting seat, the driving member is a driving knob rotatably assembled with the housing, and the driving knob is connected to the wire winding member.

[0012] In one embodiment, the wire winding mechanism further includes a direction limiting component for limiting the one-way rotation of the driving knob, the direction limiting component including: a first annular inclined rack mounted on the housing; a locking block provided with a second annular inclined rack that can mesh with the first annular inclined rack; and a first elastic member, one end of which is connected to the locking block and the other end of which is connected to the driving knob, the first elastic member providing a driving force for the locking block so that the first annular inclined rack and the second annular inclined rack are in tight meshing.

[0013] In one embodiment, the wire winding mechanism further includes an overload protection component for limiting the rotation stroke of the driving knob, the overload protection component including: a first annular rack mounted on the wire winding member; a force unloading block provided with a second annular rack that can mesh with the first annular rack; and a second elastic member, one end of which is connected to the force unloading block and the other end of which is connected to the driving knob, the second elastic member being used to provide a driving force for the force unloading block so that the first annular rack and the second annular rack are in tight meshing.

[0014] A delivery device for delivering an implantable device, the implantable device including a body and a cord connected to the body, the delivery device comprising: a housing, in a loaded state, the implantable device being connected to the housing by the cord; a cord take-up mechanism for the delivery device as described in any one of the above embodiments, mounted on the housing, one end of the cord being connected to the body, and the other end axially extending in the housing and being wound around the commutation member and then connected to the cord take-up member; the driving member driving the cord take-up member to rotate about the longitudinal central axis of the housing to wind up the cord to fix the form of the body.

[0015] A delivery system, comprising: an implantable device, the implantable device including a body and a cord connected to the body; the delivery device as described in the above embodiments, in a loaded state, the implantable device being connected to the housing by the cord; one end of the cord being connected to the body, and the other end axially extending in the housing and being wound around the commutation member and then connected to the cord take-up member; the driving member driving the cord take-up member to rotate about the longitudinal central axis of the housing to wind up the cord to fix the form of the body.

[0016] In one of the embodiments, the implantable device further includes an adjustment wire, the body including a first plugging disc and a second plugging disc disposed opposite to each other, one end of the adjustment wire being connected to the first plugging disc, and the other end passing through the second plugging disc, one end of the cord being connected to the first plugging disc or the second plugging disc, and the other end axially extending in the housing and being wound around the commutation member and then connected to the cord take-up member, a preformed knot sleeved on the adjustment wire being formed on the cord, the preformed knot being located on a side of the second plugging disc away from the first plugging disc, and the cord being wound up to lock the preformed knot to fix the adjustment wire.

[0017] In one of the embodiments, the delivery system further includes a holding tube, the holding tube being sleeved on the adjustment wire and the cord, and a distal end of the holding tube abutting against the preformed knot, and the other end abutting against the housing.

[0018] In one of the embodiments, the delivery system further includes a protection tube, the protection tube being sleeved on the adjustment wire, and the preformed knot being sleeved on the protection tube, and the protection tube being axially slidable along the adjustment wire to separate the preformed knot from the protection tube.

[0019] In one of the embodiments, the delivery system further includes an external sheath tube, the external sheath tube being a hollow tube, one end of which is movably connected to the housing, and the other end extending towards the side where the implantable device is located, and the implantable device being accommodated in the external sheath tube after being compressed.

[0020] The wire winding mechanism for a conveying device provided by an embodiment of the present invention turns the extending direction of a wire rope through a reversing member, and then drives a wire winding member to rotate to wind and roll up the wire rope, converting the axial movement of the wire rope into radial rotation. Therefore, the movable stroke of the free end of the wire rope is no longer determined by the axial dimension of the wire winding mechanism. That is to say, the axial dimension of the wire winding mechanism no longer limits the movable stroke of the free end of the wire rope. Using this wire winding mechanism can meet the requirements of the change in the movable stroke of the free end of the wire rope caused by individual differences, thereby reducing the overall size of the conveying device.

[0021] The conveying device provided by an embodiment of the present invention, by applying a wire winding mechanism, the wire winding mechanism is connected to the body through a wire rope, and the wire winding mechanism tightens the wire rope by means of rotational winding to fix the shape of the body, so that it can meet the requirements of the long-distance movement of the locking wire even when the size of the wire winding mechanism is small, and further reduces the overall size of the conveying device and is convenient for operation.

[0022] The conveying system provided by an embodiment of the present invention, by applying a wire winding mechanism connected to a wire rope, the wire winding mechanism drives the wire rope to move by means of rotational winding, so that it can meet the requirements of a longer moving stroke of the wire rope even when the size of the wire winding mechanism is small, and further reduces the overall size of the conveying device and is convenient for operation. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Among them:

[0025] Figure 1 is a schematic structural diagram of a plugging system according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a plugging device according to an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a preformed knot according to an embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of an adjusting mechanism according to an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of an adjusting mechanism according to another embodiment of the present invention;

[0030] Figure 6Schematic diagram of the fixed seat in an embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the wire winding mechanism in an embodiment of the present invention;

[0032] Figure 8 Exploded view of the wire winding mechanism in an embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the wire cutting mechanism in an embodiment of the present invention;

[0034] Figure 10 Schematic diagram of the wire knot protection mechanism in an embodiment of the present invention;

[0035] Figure 11 Schematic diagram of the plugging system in an embodiment of the present invention. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the embodiments of the present invention, it should be noted that, as terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0039] In the field of interventional medical devices, generally, the end of a medical device implanted into the human body or an animal body that is closer to the operator is referred to as the "proximal end", and the end that is farther from the operator is referred to as the "distal end". Based on this principle, the "proximal end" and "distal end" of any component of the medical device are defined. 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 that is not parallel to the "axial direction" of the medical device. Based on this principle, the "axial direction" and "radial direction" of any component of the medical device are defined. The "circumferential direction" refers to the circumferential direction, that is, the direction around the axis of the lumen structure or the cylinder.

[0040] Please refer to Figure 1 , an embodiment of the present invention provides a delivery system 100, including an implantable device 1 and a delivery device 2. Among them, the implantable device 1 is used to occlude the patent foramen ovale, the delivery device 2 is connected to the implantable device 1, the delivery device 2 can be used to deliver the implantable device 1, and releasing the connection relationship between the delivery device 2 and the implantable device 1 can release the implantable device 1.

[0041] It can be understood that the implantable device 1 is not limited to occluding the patent foramen ovale. In other embodiments, the implantable device 1 can also be used to occlude other defects in the vascular system such as the patent ductus arteriosus, atrial septal defect, or ventricular septal defect. Or, the implantable device 1 can also be other devices that are fixed in shape by tightening a wire rope.

[0042] Please refer to Figure 2 , in one embodiment, the implantable device 1 includes a body 11, an adjustment wire 12, and a locking wire 13. Among them, the locking wire 13 is a wire rope used to connect the implantable device 1 and the delivery device 1.

[0043] Among them, the body 11 includes a first occluding disc 111 and a second occluding disc 112 that are oppositely arranged. The first occluding disc 111 and the second occluding disc 112 are respectively used to cover the opposite two openings of the patent foramen ovale or other defect sites. One end of the adjustment wire 12 is connected to the first occluding disc 111, and the other end extends toward the side where the second occluding disc 112 is located and passes through the second occluding disc 112 to form a free end. The locking wire 13 is connected to the second occluding disc 112, and a preformed knot 131 is formed on the locking wire 13 (the preformed knot 131 means that it has a preliminary form of a knot but has not formed a locked state, and by pulling the free end of the locking wire 13, the preformed knot 131 can be locked and transformed into a knot). The preformed knot 131 is sleeved outside the adjustment wire 12, and the preformed knot 131 is located on the side of the second occluding disc 112 that is away from the first occluding disc 111.

[0044] After the implantable device 1 is delivered to the defect of the vasculature, the first occluding disc 111 and the second occluding disc 112 can be respectively located on opposite sides of the defect of the vasculature, so as to occlude the defect. Then, by pulling the free end of the adjusting wire 12, the distance between the first occluding disc 111 and the second occluding disc 112 can be adjusted, so that the distance between the first occluding disc 111 and the second occluding disc 112 is adapted to the anatomical structure of the corresponding patient. After the distance between the first occluding disc 111 and the second occluding disc 112 is adjusted to a proper position, by pulling the free end of the locking wire 13, the preformed knot 131 can be locked and transformed into a knot. Since the free end of the adjusting wire 12 is sleeved by the preformed knot 131, when the preformed knot 131 is locked and transformed into a knot, the free end of the adjusting wire 12 cannot move any more under the action of the knot. That is, at this time, the relative distance between the first occluding disc 111 and the second occluding disc 112 is fixed, the shape of the body 11 is locked, and the first occluding disc 111 and the second occluding disc 112 stably occlude both sides of the defect site. The arrangements of the adjusting wire 12 and the locking wire 13 enable the implantable device 1 to adapt to the differences between the anatomical structures of different patients, making the implantable device 1 have a wider scope of application.

[0045] It can be understood that in other embodiments, the locking wire 13 can also be connected to the first occluding disc 111, and the connection position of the locking wire 13 is not limited, as long as it is ensured that the preformed knot 131 can be formed on the side of the second occluding disc 112 away from the first occluding disc 111.

[0046] In one embodiment, both the first occluding disc 111 and the second occluding disc 112 are formed by braiding filaments. It should be noted that the adjusting wire 12 can be an independent wire rope, which is connected to the first occluding disc 111 by knotting or melting, or the adjusting wire 12 can also be derived from the filaments on the first occluding disc 111. The locking wire 13 can also be an independent wire rope, which is connected to the first occluding disc 111 or the second occluding disc 112 by knotting or melting, or the locking wire 13 can also be derived from the filaments on the first occluding disc 111 or the second occluding disc 112.

[0047] Please continue to refer to Figure 3, in one embodiment, the preformed knot 131 is formed as follows: First, the two ends of the locking thread 13 are overlapped to form a first basic wire loop 130a, then the free end of the locking thread 13 is passed through the first basic wire loop 130a to form a second basic wire loop 130b, then the free end of the locking thread 13 is passed through the second basic wire loop 130b to form a third basic wire loop 130c, and then the locking thread 13 is pulled so that the third basic wire loop 130c remains, and the first basic wire loop 130a and the second basic wire loop 130b are tightened. The adjustment wire 12 is adapted to pass through the third basic wire loop 130c. When the free end of the locking thread 13 is pulled so that the third basic wire loop 130c is tightened, the preformed knot 131 is locked and transformed into a knot for fixing the adjustment wire 12.

[0048] It can be understood that the knotting method of the preformed knot 131 is not limited as long as it can satisfy that the adjustment wire 12 can pass through the preformed knot 131 and the free end of the adjustment wire 12 can be fixed after the preformed knot 131 is locked.

[0049] Please return to Figure 1 , in one embodiment, the conveying device 2 includes a housing 21, an adjusting mechanism 22, a wire winding mechanism 23 and a wire cutting mechanism 24.

[0050] Among them, the adjusting mechanism 22, the wire winding mechanism 23 and the wire cutting mechanism 24 are all installed on the housing 21. In the loading state, the implantable device 1 is connected to the housing 21 through a wire rope (the locking thread 13 in this embodiment). The adjusting mechanism 22 can be connected to the free end of the adjustment wire 12, and the adjusting mechanism 22 can drive the free end of the adjustment wire 12 to move axially along the housing 21 toward the proximal side of the housing 21. The wire winding mechanism 23 can be connected to the free end of the locking thread 13, and the wire winding mechanism 23 can wind up the free end of the locking thread 13 to lock the preformed knot 131 on the locking thread 13. The wire cutting mechanism 24 is located at the distal ends of both the adjusting mechanism 22 and the wire winding mechanism 23 at the same time. The wire cutting mechanism 24 can cut the adjustment wire 12 and the locking thread 13, so as to separate the implantable device 1 from the conveying device 2, and further release the implantable device 1.

[0051] In the above-mentioned delivery device 2, during the process of delivering the implantable device 1, the adjusting mechanism 22 is connected to the free end of the adjusting wire 12 on the implantable device 1, and the wire winding mechanism 23 is connected to the locking wire 13. When the implantable device 1 is delivered to the defect of the vascular system and the first occluding disc 111 and the second occluding disc 112 are in the deployed state, the free end of the adjusting wire 12 can be first driven by the adjusting mechanism 22 to move axially along the housing 21 towards the proximal side of the housing 21, so that the first occluding disc 111 moves towards the side close to the second occluding disc 112 under the drive of the adjusting wire 12, thereby adjusting the distance between the first occluding disc 111 and the second occluding disc 112. Then, the free end of the locking wire 13 is wound by the wire winding mechanism 23, so that the preformed knot 131 on the locking wire 13 is tightened to form a knot. Under the action of the knot, the adjusting wire 12 can no longer move, so that the relative positions of the first occluding disc 111 and the second occluding disc 112 are fixed. Finally, the adjusting wire 12 and the locking wire 13 are cut by the wire cutting mechanism 24, and the release of the implantable device 1 can be completed.

[0052] It can be understood that the wire cutting mechanism 24 in this embodiment cuts the adjusting wire 12 and the locking wire 13 outside the human anatomical structure, and its purpose is to separate the delivery device 2 from the implantable device 1. Therefore, after the wire cutting mechanism 24 cuts the adjusting wire 12 and the locking wire 13, a wire trimming device is also required to perform secondary trimming on the adjusting wire 12 and the locking wire 13 from a position close to the distal end of the knot, so as to remove the excess lengths of the adjusting wire 12 and the locking wire 13 connected to the implantable device 1, and prevent the excess lengths of the adjusting wire 12 and the locking wire 13 from floating into the blood vessel and causing blood vessel blockage. Among them, the wire trimming device belongs to the prior art, so it will not be elaborated here.

[0053] Please refer to Figure 4 , in one embodiment, the adjusting mechanism 22 includes a first operating member 221 and a first wire winding group 222.

[0054] Among them, the first operating member 221 is slidably assembled with the housing 21 in the axial direction of the housing 21. The first wire winding group 222 is installed on the first operating member 221. The first wire winding group 222 includes a first wire winding wheel 2221. The free end of the adjusting wire 12 is wound and redirected through the first wire winding wheel 2221 and then fixed on the housing 21.

[0055] With such an arrangement, the first winding group 222 is mounted on the first operating member 221. Therefore, the first winding group 222 can slide axially along the housing 21 synchronously with the first operating member 221. The free end of the adjusting wire 12 is wound around the first winding wheel 2221, reversed, and then fixed to the housing 21. Thus, when the first operating member 221 slides proximally, under the action of the first winding wheel 2221, the adjusting wires 12 on both sides of the first winding wheel 2221 will move synchronously. Therefore, the moving speed of the distal end of the adjusting wire 12 (the end of the adjusting wire 12 assembled with the first sealing disc 111) is actually twice the moving speed of the first operating member 221, and the moving stroke of the distal end of the adjusting wire 12 is also twice the moving stroke of the first operating member 221. That is, the arrangement of the first winding group 222 can make the first sealing disc 111 and the second sealing disc 112 approach each other faster, so that the first sealing disc 111 and the second sealing disc 112 can be quickly adjusted to positions adapted to the patient's anatomical structure, shortening the operation time. At the same time, the sliding stroke of the first operating member 221 required to adjust the first sealing disc 111 and the second sealing disc 112 to positions adapted to the patient's anatomical structure can be shortened, thereby minimizing the axial dimension of the housing 21 as much as possible.

[0056] It can be understood that in other embodiments, the first winding group 222 can also be omitted. When the first winding group 222 is omitted, the free end of the adjusting wire 12 is directly fixed to the first operating member 221. At this time, the moving speed and moving stroke of the distal end of the adjusting wire 12 are the same as those of the first operating member 221.

[0057] Please continue to refer to Figure 5 , in another embodiment, the first winding group 222 includes three first winding wheels 2221. At this time, the adjusting mechanism 22 further includes a second winding group 223. The second winding group 223 includes two second winding wheels 2231. The second winding group 223 is fixedly mounted on the housing 21, and the second winding group 223 is located between the fixing point of the adjusting wire 12 on the housing 21 and the first winding group 222. The adjusting wire 12 forms a fold-back between the first winding wheel 2221 and the second winding wheel 2231 in sequence, and finally is fixed to the housing 21.

[0058] With such a setting, the second winding group 223 is fixed on the housing 21. Therefore, the second winding wheel 2231 actually only serves the function of commutation. In this embodiment, since the adjusting wire 12 is first wound and commuted around the first winding wheel 2221, then wound and commuted around the second winding wheel 2231, and then wound and commuted around another first winding wheel 2221... and so on, successively winding all the adjusting wires 12 on the first winding wheels 2221 and the second winding wheels 2231. Therefore, in this embodiment, there are 3 first winding wheels 2221 that slide simultaneously with the first operating member 221, and the adjusting wire 12 is wound on all 3 first winding wheels 2221. Therefore, in this embodiment, the moving speed of the distal end of the adjusting wire 12 is actually 6 times that of the first operating member 221. That is, by setting the second winding group 223, the second winding group 223 plays the role of a fixed pulley for commutation, so that the adjusting wire 12 can be wound around multiple first winding wheels 2221 at the same time, enabling multiple first winding wheels 2221 to synchronously play the role of a movable pulley, thereby further increasing the moving speed of the distal end of the adjusting wire 12 and shortening the sliding stroke required for the first operating member 221 to move.

[0059] It can be understood that in other embodiments, it can also be that the number of the first winding wheels 2221 is two, and the number of the second winding wheels 2231 is one, or the number of the first winding wheels 2221 is four, and the number of the second winding wheels 2231 is three, or the number of the first winding wheels 2221 is four, and the number of the second winding wheels 2231 is two. That is, the number of the first winding wheels 2221 and the number of the second winding wheels 2231 are not limited. When the number of the first winding wheels 2221 is one, the second winding wheel 2231 can be not provided. When the number of the first winding wheels 2221 is two or more, as long as the number of the second winding wheels 2231 is less than the number of the first winding wheels 2221, at least two first winding wheels 2221 can be wound by the adjusting wire 12 to play the role of a movable pulley. In addition, it can be understood that the number of the second winding wheels 2231 can also be greater than the number of the first winding wheels 2221. However, the numerical ratio relationship between the moving speed of the distal end of the adjusting wire 12 and the moving speed of the first operating member 221 is actually determined by the number of the first winding wheels 2221 that play the role of a movable pulley. For example, when the number of the first winding wheels 2221 is four and the number of the second winding wheels 2231 is two, at this time, only three first winding wheels 2221 can fully play the role of a movable pulley. Therefore, the moving speed of the distal end of the adjusting wire 12 is actually still 6 times the moving speed of the first operating member 221. That is, when the adjusting mechanism 22 includes the second winding group 223, the number of the second winding wheels 2231 is several, and "several" refers to an integer greater than or equal to 1.

[0060] It can also be understood that in other embodiments, the second winding group 223 can also be located on the distal side of the first winding group 222, or on the proximal side of the fixing point of the adjusting wire 12 on the housing 21. The positions of the first winding group 222 and the second winding group 223 only need to satisfy that the first winding wheel 2221 can play the role of a movable pulley, and the adjusting wire 12 will not disengage from the first winding wheel 2221 and the second winding wheel 2231.

[0061] Please continue to refer to Figure 5 , in an embodiment, the housing 21 is a hollow structure, and a first sliding hole (not shown in the figure) extending along the axial direction of the housing 21 is formed in the side wall of the housing 21. The first operating member 221 includes a first sliding portion 2211 and a first operating portion 2212. Among them, the main body portion of the first sliding portion 2211 is accommodated in the housing 21 and is slidably assembled with the housing 21. The end portion of the first sliding portion 2211 extends out of the housing 21 through the first sliding hole. The first operating portion 2212 is connected to the first sliding portion 2211, and the first operating portion 2212 is located outside the housing 21. By moving the first operating portion 2212, the first sliding portion 2211 can be driven to slide along the first sliding hole. The first winding group 222 is installed on the first sliding portion 2211.

[0062] In this embodiment, there are two first sliding holes, and they are symmetrically distributed on the side wall of the housing 21. There are also two corresponding first operating portions 2212, so that the first operating member 221 can slide more stably along the first sliding holes. In other embodiments, the number of first sliding holes can also be set to an integer number such as three, four, six, etc., and the number of corresponding first operating portions 2212 can also be set to other integer numbers, so as to facilitate the operator to select the first operating portion 2212 on the most convenient side for pushing. In addition, in an embodiment, anti-slip ridges 22121 are further provided on the first operating portion 2212, so as to facilitate the operator to apply an external force to the first operating portion 2212.

[0063] Please refer to Figure 5-6 , in an embodiment, the free end of the adjusting wire 12 is fixed to the housing 21 through a fixing seat 25. The fixing seat 25 includes a first fixing block 251, a second fixing block 252, an assembly screw 253, and an elastic connecting member 254.

[0064] Among them, the first fixing block 251 is fixedly installed on the housing 21. On the side of the first fixing block 251 away from the housing 21, helical teeth (not shown in the figure) are provided along the circumferential direction. The second fixing block 252 is engaged with the first fixing block 251 through the helical teeth, so that the second fixing block 252 can only rotate unidirectionally relative to the first fixing block 251. The assembly screw 253 is threadedly connected to the first fixing block 251. One end of the elastic connecting member 254 is connected to the assembly screw 253, and the other end is connected to the second fixing block 252. The free end of the adjusting wire 12 is fixed to the second fixing block 252.

[0065] With such a setting, when assembling the implantable device 1 and the delivery device 2, the excess adjusting wire 12 can be wound by rotating the second fixing block 252, so as to avoid the situation that the first operating member 221 needs a large movement stroke due to the too long length of the adjusting wire 12, or the free end of the adjusting wire 12 cannot be connected to the first operating member 221 due to the too short length of the adjusting wire 12. At the same time, since the second fixing block 252 can only rotate unidirectionally, it is possible to avoid the situation that the second fixing block 252 reverses and the adjusting wire 12 becomes loose under the tension of the adjusting wire 12 during the delivery process. It can be understood that in other embodiments, the adjusting wire 12 can also be directly fixed to the housing 21 by means of tying or gluing.

[0066] Please return to Figure 5 , in one embodiment, to prevent the first operating member 221 from being accidentally touched and driving the adjusting wire 12 to move in advance, a first locking assembly 224 is further provided in the adjusting mechanism 22. The first locking assembly 224 is used to lock or unlock the first operating member 221 on the housing 21.

[0067] In one embodiment, the first locking assembly 224 includes a first clamping member 2241, a first locking block 2242, and a first elastic member 2243. Among them, the first clamping member 2241 is installed on the housing 21, and a plurality of continuous first clamping grooves 22411 are provided on the first clamping member 2241. The plurality of first clamping grooves 22411 are uniformly arranged along the axial direction of the housing 21. The first locking block 2242 is connected to the first sliding portion 2211 of the first operating member 221, and the first locking block 2242 can be movably accommodated in the first clamping groove 22411. One end of the first elastic member 2243 is connected to the first locking block 2242, and the other end is connected to the first operating member 221. The first elastic member 2243 is used to provide a driving force for the first locking block 2242 so that the first locking block 2242 is accommodated in the first clamping groove 22411.

[0068] When the first locking block 2242 is received in the first card slot 22411, the first operating member 221 is locked to the housing 21. When a driving force is applied to the first operating member 221 such that the first operating member 221 can overcome the driving force provided by the first elastic member 2243 to the first locking block 2242, the first locking block 2242 slides out of the first card slot 22411, and the first operating member 221 is unlocked. Such a setting makes it necessary to apply a sufficiently large driving force to move the first operating member 221. When no external force is applied to the first operating member 221 or the external force is not sufficient to overcome the action of the first elastic member 2243, the first operating member 221 is locked and will not move by itself. Thus, it is possible to avoid the situation where the adjustment wire 12 moves prematurely before reaching the target position due to accidental contact with the first operating member 221.

[0069] It can be understood that the setting of multiple consecutive first card slots 22411 enables the first operating member 221 to be locked at any position on the length of the first engaging member 2241. In other embodiments, only one first card slot 22411 may be provided, or multiple first card slots 22411 may be spaced apart. In this way, the locking and unlocking of the first operating member 221 can also be achieved. Additionally, in this embodiment, two sets of first locking components 224 are provided and are respectively located on both sides in the radial direction of the housing 21, thereby making the sliding and locking of the first operating member 221 more stable. In other embodiments, only one set of first locking components 224 may be provided, or three sets, four sets, or other integer sets of first locking components 224 may be provided.

[0070] Please continue to refer to Figure 7-8 , in one embodiment, the wire take-up mechanism 23 includes a reversing member 231, a wire take-up member 232, and a driving member 233.

[0071] Among them, the reversing member 231 is installed on the housing 21, and the free end of the locking wire 13 rotates around the reversing member 231, so that the extending direction of the locking wire 13 changes from the original axial extension along the housing 21 to the radial extension along the housing 21. The wire take-up member 232 is connected to the free end of the locking wire 13 after the extension direction is changed. The driving member 233 is installed on the housing 21, and the driving member 233 is connected to the wire take-up member 232. The driving member 233 is used to drive the wire take-up member 232 to rotate in the radial direction of the housing 21 to wind up the locking wire 13, thereby locking the preformed knot 131.

[0072] The extension direction of the locking wire 13 is changed by the reversing member 231, and then the driving member 233 is used to drive the wire winding member 232 to rotate to wind and roll up the locking wire 13, converting the axial movement of the locking wire 13 into radial rotation. Therefore, compared with tightening the preformed knot 131 by axial movement, the axial dimension of the wire winding mechanism 23 in this embodiment does not affect the movable stroke of the locking wire 13, so that the overall dimension of the conveying device 2 can be reduced.

[0073] It can be understood that the wire winding structure 23 in this embodiment is not limited to tightening the locking wire 13. In other embodiments, it can also be used to tighten the adjusting wire 12 or other wire ropes that need to move over a long distance.

[0074] Please continue to refer to Figure 7-8 , in one embodiment, two mounting seats 212 are provided on the housing 21. Assembly holes (not labeled in the figure) are formed in the two mounting seats 212. The wire winding member 232 is of a cylindrical structure, and both ends of the wire winding member 232 are respectively inserted into the assembly holes to be rotatably assembled with the mounting seats 212. The wire winding member 232 can rotate around its own central axis on the mounting seats 212, so as to realize the winding of the locking wire 13. The driving member 233 is a driving knob 2330 rotatably assembled with the housing 21. The distal end of the driving knob 2330 is connected to the proximal end of the wire winding member 232. By rotating the driving knob 2330, the wire winding member 232 can be driven to rotate.

[0075] It can be understood that the setting of the mounting seats 212 makes the wire winding member 232 not completely suspended in the housing 21. The mounting seats 212 can provide a supporting force for the wire winding member 232, so that the wire winding member 232 can rotate more stably, which is beneficial to winding the locking wire 13. In addition, the specific shape and number of the mounting seats 212 are not limited. The shapes of the mounting seats 212 can be different from each other. The mounting seats 212 can also be provided with an integer number such as three or four. The mounting seats 212 only need to be able to provide a supporting force for the wire winding member 232. In other embodiments, the mounting seats 212 can also be omitted, and the wire winding member 232 can be directly fixed on the driving member 233. In addition, by setting the driving member 233 as a driving knob 2330 rotatably connected to the housing 21, its structure is simple and easy to implement. In other embodiments, an electric driving method such as a micro motor can also be set.

[0076] Please continue to refer to Figure 7-8, in one embodiment, a wire receiving groove 2321 is formed on the cylindrical structure of the wire receiving member 232. The free end of the locking wire 13 is fixed to the bottom wall of the wire receiving groove 2321, so that the wound locking wire 13 is all received in the wire receiving groove 2321, thereby preventing the locking wire 13 from slipping off the wire receiving member 232 during the winding process. In addition, it can be understood that ribs 2322 can also be provided on the bottom wall of the wire receiving groove 2321, so as to further increase the friction between the wire receiving member 232 and the locking wire 13 and facilitate the winding of the locking wire 13.

[0077] In one embodiment, an annular card slot is provided at the proximal end of the housing 21, and an annular card block is provided on the driving knob 2330. The driving knob 2330 and the housing 21 are rotationally connected through the engagement of the annular card slot and the annular card block. In other embodiments, it may also be that an annular card block is provided on the housing 21 and an annular card slot is provided on the driving knob 2330.

[0078] Please continue to refer to Figure 7-8 , in one embodiment, the wire receiving mechanism 23 further includes a direction limiting component 234, and the direction limiting component 234 is used to limit the driving knob 2330 to rotate in only one direction.

[0079] Specifically, the direction limiting component 234 includes a first annular inclined rack 2341, a locking block 2342, and a first elastic member 2343. The first annular inclined rack 2341 is installed on the housing 21. A second annular inclined rack 23421 that can be engaged with the first annular inclined rack 2341 is provided on the locking block 2342. One end of the first elastic member 2343 is connected to the locking block 2342, and the other end is connected to the driving knob 2330. The first elastic member 2343 is used to provide a driving force for the locking block 2342 so that the first annular inclined rack 2341 and the second annular inclined rack 23421 are tightly engaged. One end of the locking block 2342 abuts against the first annular inclined rack 2341, and the other end is connected to the driving knob 2330 through the first elastic member 2243 and is received in the driving knob 2330.

[0080] With such a setting, when the driving knob 2330 is rotated to move the driving knob 2330 in the direction in which the single helical tooth slope of the second annular helical rack 23421 increases, since the first annular helical rack 2341 is fixed to the housing 21 and will not move, the single helical tooth of the second annular helical rack 23421 will rotate along the inclined surface of the single helical tooth on the first annular helical rack 2341, thereby compressing the first elastic member 2343 under an external force to realize the rotation of the driving knob 2330. When the driving knob 2330 is rotated in the reverse direction, due to the blocking effect of the side wall of the single helical tooth, the driving knob 2330 will not be able to rotate. That is, under the action of the first annular helical rack 2341 and the second annular helical rack 23421, the driving knob 2330 can only rotate in a single direction. Thus, after the driving knob 2330 is rotated to the target position, even if the operator no longer applies a rotational force to the driving knob 2330, the driving knob 2330 will not rotate in the reverse direction under the tension of the locking wire 13. Therefore, the operator's hands can be liberated, facilitating the progress of other release steps. It can be understood that in this embodiment, the direction in which the single helical tooth slope of the second annular helical rack 23421 increases is the clockwise direction. Therefore, in this embodiment, the driving knob 2330 can only rotate in the clockwise direction. In other embodiments, the direction in which the single helical tooth slope of the second annular helical rack 23421 increases can also be the counterclockwise direction.

[0081] Please continue to refer to Figure 7-8 , in one embodiment, the wire take-up mechanism 23 further includes an overload protection assembly 235 for limiting the rotation stroke of the driving knob 2330.

[0082] The overload protection assembly 235 includes a first annular rack 2351, a force relief block 2352, and a second elastic member 2353. The first annular rack 2351 is installed on the wire take-up member 232. The force relief block 2352 is provided with a second annular rack 23521 that can mesh with the first annular rack 2351. One end of the second elastic member 2353 is connected to the force relief block 2352, and the other end is connected to the driving knob 2330. The second elastic member 2353 is used to provide a driving force for the force relief block 2352 to make the first annular rack 2351 and the second annular rack 23521 abut and mesh tightly. One end of the force relief block 2352 abuts against the first annular rack 2351, and the other end is connected to the driving knob 2330 through the second elastic member 2353 and is received in the driving knob 2330.

[0083] With such a setting, before the locking wire 13 is locked, the locking wire 13 is in a relaxed state, and the torque applied to the wire take-up member 232 is small. Therefore, the wire take-up member 232 can rotate together with the force-release block 2352 under the engagement of the first annular rack 2351 and the second annular rack 23521 along with the driving knob 2330, thereby taking up the locking wire 13. When the locking wire 13 is locked, the locking wire 13 is in a tensioned state. At this time, if the driving knob 2330 is continuously rotated, the locking wire 13 will provide a relatively large torque to the wire take-up member 232. When this torque is greater than the torque applied by the driving knob 2330 to the force-release block 2352, continuously rotating the driving knob 2330 will cause the force-release block 2352 to slide by compressing the second elastic member 2353, that is, the first annular rack 2351 and the second annular rack 23521 are no longer continuously engaged, and the force-release block 2352 can no longer drive the wire take-up member 232 to rotate, resulting in a slipping phenomenon, thereby preventing the phenomenon that the locking wire 13 breaks due to excessive tension when the driving knob 2330 is continuously rotated after the locking wire 13 is locked.

[0084] Please continue to refer to Figure 7 , in an embodiment, a receiving groove 23301 is formed on the driving knob 2330. The locking block 2342 and the force-release block 2352 are both received in the receiving groove 23301, and the first elastic member 2342 and the second elastic member 2353 are both connected to the bottom wall of the receiving groove 23301. Moreover, one end of the wire take-up member 232 where the first annular rack 2351 is installed extends into the locking block 2342, and one end of the force-release block 2352 where the second annular rack 23521 is provided extends into the locking block 2342, thereby making the structure of the conveying device 2 more compact.

[0085] In this embodiment, both the first elastic member 2343 and the second elastic member 2353 are springs. To make the driving force direction provided when the spring is compressed more stable, a guiding post 23302 is further provided on the driving knob 2330. The first elastic member 2343 is sleeved on the guiding post 23302 and abuts against the bottom wall of the receiving groove 23301. The force-release block 2352 is received in the guiding post 23302. One end of the second elastic member 2353 extends into the force-release block 2352 and abuts against the force-release block 2352, and the other end extends out of the force-release block 2352 and abuts against the bottom wall of the receiving groove 23301.

[0086] In other embodiments, the first elastic member 2343 and the second elastic member 2353 can also be other elastic elements such as rubber pads or elastic sheets.

[0087] Please refer to Figure 9 , in an embodiment, the wire cutting mechanism 24 includes a wire fixing base 241, a cutter 242, a button 243, and a first reset member 244.

[0088] Among them, the wire fixing base 241 is installed on the housing 21. A through hole 2410 extending axially is formed on the wire fixing base 241. The through hole 2410 is for the adjusting wire 12 and the locking wire 13 to pass through ( Figure 9 wherein the adjusting wire 12 and the locking wire 13 overlap). The cutter 242 has a cutting edge. The cutter 242 can slide along the radial direction of the housing 21 to cut the adjusting wire 12 and the locking wire 13. The button 243 is slidably assembled with the housing 21 along the radial direction of the housing 21, and the button 243 is connected to the cutter 242. One end of the first reset member 244 is connected to the wire fixing base 241, and the other end is connected to the button 243. The button 243 overcomes the elastic force of the first reset member 244 to drive the cutter 242 to move toward the side for cutting the adjusting wire 12 and the locking wire 13.

[0089] Before the preformed knot 131 is locked, the button 243 moves away from the wire fixing base 241 under the action of the elastic force of the first reset member 244. When the preformed knot 131 is locked, by applying a driving force to the button 243, the driving force is greater than the elastic force provided by the first reset member 244, so that the button 243 moves toward the side close to the through hole 2410, and then drives the cutter 242 mounted on the button 243 to move toward the side close to the through hole 2410 until it abuts against the adjusting wire 12 and the locking wire 13 and cuts the adjusting wire 12 and the locking wire 13. After the cutting is completed, the driving force applied to the button 243 is released, and the button 243 moves away from the through hole 2410 under the action of the first reset member 244 and returns to the initial position. The structure is simple and easy to implement.

[0090] Please continue to refer to Figure 9 , in an embodiment, the tangent mechanism 24 further includes an anti-misoperation component 245. The anti-misoperation component 245 is used to lock or unlock the button 243 at a predetermined position of the housing 21.

[0091] The anti-misoperation component 245 includes a stopper 2451, a second reset member 2452, and a control member 2453. Among them, the stopper 2451 is movably abutted against the button 243. When the stopper 2451 abuts against the button 243, the button 243 is locked and cannot move relative to the housing 21. When the stopper 2451 is separated from the button 243, the button 243 is unlocked and can slide relative to the housing 21. One end of the second reset member 2452 is connected to the housing 21, and the other end is connected to the stopper 2451. The second reset member 2452 provides a driving force for the stopper 2451 to move along the axial direction of the housing 21 so that the stopper 2451 abuts against the button 243. The control member 2453 is slidably assembled with the housing 21 along the axial direction of the housing 21. The control member 2453 is connected to the stopper 2451. When the control member 2453 moves against the elastic force of the second reset member 2452, the stopper 2451 is separated from the button 243.

[0092] When the anti-misoperation component 245 is in the initial state, the stopper 2451 abuts against the key 243 under the action of the second resetting member 2452, and the key 243 is locked. At this time, the key 243 cannot be pressed. By applying an external force to the stopper 2451 to move the stopper 2451 to the side that overcomes the elastic force provided by the second resetting member 2452, the stopper 2451 is separated from the key 243, and the key 243 can be pressed. Then, the key 243 drives the cutter 242 to cut the adjustment wire 12 and the locking wire 13. The setting of the anti-misoperation component 245 can prevent the key 243 from being misoperated before the adjustment wire 12 reaches the target position or the preformed knot 131 is not locked, resulting in the premature cutting of the adjustment wire 12 and the locking wire 13 and the abnormal use of the implantable device 1.

[0093] Please return to Figure 1 . In one embodiment, the conveying device 2 further includes a knot protection mechanism 26 for maintaining the preformed knot 131 in an unlocked state.

[0094] Please refer to Figure 10 , the knot protection mechanism 26 includes a protection tube 261 and a second operating member 262. Among them, the protection tube 261 is a hollow tube, the adjustment wire 12 can pass through the protection tube 261, and the preformed knot 131 is sleeved outside the protection tube 261. The second operating member 262 is slidably assembled with the housing 21 along the axial direction of the housing 21. The second operating member 262 is connected to the proximal end of the protection tube 261, and the second operating member 262 can drive the protection tube 261 to slide along the axial direction of the housing 21.

[0095] The setting of the knot protection mechanism 26 makes the preformed knot 131 sleeved outside the protection tube 261 before the implantable device 1 is delivered to the target position. At this time, under the action of the protection tube 261, even if the free end of the locking wire 13 is pulled, the preformed knot 131 will not tighten. After the implantable device 1 is delivered to the target position, by controlling the sliding of the second operating member 262 to drive the protection tube 261 to move towards the proximal end of the housing 21, the preformed knot 131 is disengaged from the protection tube 261. At this time, by pulling the free end of the locking wire 13, the preformed knot 131 can be locked, thereby fixing the adjustment wire 12. This setting can avoid the situation where the preformed knot 131 is prematurely locked due to misoperation of the free end of the locking wire 13 before the implantable device 1 is delivered to the target position.

[0096] Please continue to refer to Figure 10, in one embodiment, a second sliding hole (not shown in the figure) extending along the axial direction of the housing 21 is further formed in the side wall of the housing 21. The second operating member 262 includes a second sliding portion 2621 and a second operating portion 2622. Among them, the main body portion of the second sliding portion 2621 is accommodated in the housing 21 and is slidably assembled with the housing 21. The end portion of the second sliding portion 2622 extends out of the housing 21 through the second sliding hole. The second operating portion 2621 is connected to the second sliding portion 2622, and the second operating portion 2621 is located outside the housing 21. By moving the second operating portion 2621, the second sliding portion 2622 can be driven to slide along the second sliding hole.

[0097] In this embodiment, there are two second sliding holes, which are symmetrically distributed on the side wall of the housing 21, and there are also two corresponding second operating portions 2622, so that the second operating member 262 can slide more stably along the second sliding hole. In other embodiments, the number of second sliding holes can also be set to an integer number such as three, four, six, etc., and the number of corresponding second operating portions 2622 can also be set to other integer numbers, so as to facilitate the operator to select the second operating portion 2622 on the most convenient side to push. In addition, in one embodiment, an anti-slip rib 26221 is further provided on the second operating portion 2622, so as to facilitate the operator to apply an external force to the second operating portion 2622. In this embodiment, an installation hole (not shown in the figure) is formed in the second sliding portion 2622, and the end portion of the protective tube 261 is accommodated in the installation hole and is bonded to the second sliding portion 2622. In other embodiments, the protective tube 261 can also be connected to the second sliding portion 2622 by means of snap connection or threaded connection.

[0098] Please continue to refer to Figure 10 , in one embodiment, to prevent the second operating member 262 from being accidentally touched and driving the protective tube 261 to move in advance, a second locking assembly 263 is further provided in the wire knot protection mechanism 26. The second locking assembly 263 is used to lock or unlock the second operating member 262 on the housing 21.

[0099] In one embodiment, the second locking assembly 263 includes a second clamping member 2631, a second locking block 2632 and a second elastic member 2633. Among them, the second clamping member 2631 is installed on the housing 21, and a plurality of continuous second clamping grooves 26311 are formed on the second clamping member 2631. The plurality of second clamping grooves 26311 are uniformly arranged along the axial direction of the housing 21. The second locking block 2632 is connected to the second sliding portion 2621 of the second operating member 262 and is movably accommodated in the second clamping groove 26311. One end of the second elastic member 2633 is connected to the second locking block 2632, and the other end is connected to the second operating member 262. The second elastic member 2633 is used to provide a driving force for the second locking block 2632 so that the second locking block 2632 is accommodated in the second clamping groove 26311.

[0100] When the second locking block 2632 is received in the second card slot 26311, the second operating member 262 is locked to the housing 21. When a driving force is applied to the second operating member 262 such that the second operating member 262 can overcome the driving force provided by the second elastic member 2633 to the second locking block 2632, the second locking block 2632 slides out of the second card slot 26311, and the second operating member 262 is unlocked. With this arrangement, it is necessary to apply a sufficiently large driving force to move the second operating member 262. When no external force is applied to the second operating member 262 or the external force is not sufficient to overcome the action of the second elastic member 2633, the second operating member 262 is locked and will not move by itself. Thus, it is possible to avoid the situation where the protection tube 261 is prematurely withdrawn and the preformed knot 131 is prematurely locked before the implantable device 1 is delivered to the target position due to accidental contact with the second operating member 262.

[0101] It can be understood that the arrangement of multiple consecutive second card slots 26311 enables the second operating member 262 to be locked at any position along the length of the second engaging member 2631. In other embodiments, only one second card slot 26311 may be provided, or multiple second card slots 26311 may be spaced apart. In this way, the locking and unlocking of the second operating member 262 can also be achieved. Additionally, in this embodiment, two sets of second locking assemblies 263 are provided and are respectively located on both sides in the radial direction of the housing 21, thereby making the sliding and locking of the second operating member 262 more stable. In other embodiments, only one set of second locking assemblies 263 may be provided, or the second locking assemblies 263 may be provided in three sets, four sets or other integer sets.

[0102] Please return to Figure 1 , in one embodiment, the delivery device 2 further includes a holding tube 27. The proximal end of the holding tube 27 is connected to the housing 21, and the holding tube 27 is sleeved outside the protection tube 261. The distal end of the holding tube 27 abuts against the preformed knot 131.

[0103] The provision of the holding tube 27 can, on the one hand, be used to abut the second sealing disc 112 against the human anatomical structure when pulling the adjustment wire 12, thereby preventing the distance between the first sealing disc 111 and the second sealing disc 112 from not conforming to the human anatomical structure due to a certain distance between the second sealing disc 112 and the human anatomical structure, or preventing the second sealing disc 112 from moving together with the adjustment wire 12 during the movement of the adjustment wire 12. On the other hand, the holding tube 27 can also abut against the preformed knot 131, thereby preventing the preformed knot 13 from moving during the pulling of the locking wire 13 and causing the finally obtained knot to be in an undesired position.

[0104] It can be understood that in one embodiment, the abutting tube 27 is arranged as a multi-lumen tube, and the protective tube 261 is accommodated in one of the lumens. Such an arrangement can ensure that the abutting tube 27 has a large radial dimension on the basis of being able to abut against the preformed knot 13, thereby increasing the contact area with the second sealing disc 112 and playing a better abutting role on the second sealing disc 112. In other embodiments, the abutting tube 27 can also be arranged as a single-lumen tube, which can also play an abutting role.

[0105] Please refer to Figure 11 , in one embodiment, the occlusion system 100 further includes an external sheath tube 3. The external sheath tube 3 is a hollow tube, one end of which abuts against the distal end of the housing 21, and the other end extends toward the side where the implantable device 1 is located. The implantable device 1 is accommodated in the external sheath tube 3 after being compressed. The external sheath tube 3 cooperates with the delivery device 2 to deliver the implantable device 1.

[0106] The specific delivery-release process of the implantable device 1 in this embodiment is as follows: First, the implantable device 1 is connected to the delivery device 2, and then the implantable device 1 is compressed and accommodated in the external sheath tube 3. The implantable device 1 is delivered to the defect of the vascular system under the cooperation of the delivery device 2 and the external sheath tube 3. Then, the external sheath tube 3 is withdrawn, so that the first sealing disc 111 and the second sealing disc 112 are respectively located at two opposite positions of the defect. After that, the second sealing disc 112 is abutted against the tissue of the vascular system by using the abutting tube 27. Then, the adjustment wire 12 is pulled, so that the first sealing disc 111 moves toward the side close to the second sealing disc 112 until the first sealing disc 111 also abuts against the tissue of the vascular system. Then, the protective tube 261 is withdrawn, so that the preformed knot 131 is in a state where it can be locked. Then, the locking wire 13 is wound up, so that the preformed knot 131 is locked to form a knot under the abutment of the abutting tube 27. At this point, the first sealing disc 111 and the second sealing disc 112 are stably located on opposite sides of the defect to occlude the defect. Then, the adjustment wire 12 and the locking wire 13 are cut by using the tangent mechanism 24, so as to separate the implantable device 1 from the delivery device 2, so that the delivery device 2 can be withdrawn from the human anatomical structure. Finally, the redundant adjustment wire 12 and the locking wire 13 at the distal part of the knot are sheared by using the wire cutting device, and the entire release process of the implantable device 1 is completed.

[0107] It can be understood that the compressed implantable device 1 can be guided by the guiding sheath 4 to be accommodated in the external sheath tube 3. The guiding sheath 4 can be arranged as a tearable sheath, so that it can be removed after guiding the implantable device into the external sheath tube 3.

[0108] In addition, in other embodiments, an outer sheath tube that can slide relative to the housing 21 of the delivery device 2 and a control component for controlling the movement of the outer sheath tube may be directly added to the housing 21 of the delivery device 2. By controlling the sliding of the outer sheath tube through the control component, the restraint and release of the implantable device 1 are completed, thereby making the integrity of the delivery device 2 stronger.

[0109] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0110] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A wire winding mechanism for a conveying device, the conveying device being used for conveying an implantable device, the conveying device including a housing, in a loaded state, the implantable device being connected to the housing by a wire rope, characterized in that, The wire winding mechanism includes: A reversing member connected to the housing. The proximal end of the wire rope axially extends in the housing and is connected to the reversing member. The reversing member allows the wire rope to be wound around it to change the extension direction, causing the wire rope to extend in the radial direction. A wire winding member for fixing the wire rope after the extension direction is changed; and A driving member connected to the housing, and the driving member is connected to the wire winding member. The driving member can drive the wire winding member to rotate around the longitudinal central axis of the housing to wind the wire rope.

2. The wire winding mechanism for a conveying device according to claim 1, characterized in that, An installation seat is provided on the housing. The wire winding member is rotatably connected to the installation seat. The wire winding member can rotate around its own central axis on the installation seat. The driving member is a driving knob rotatably assembled with the housing, and the driving knob is connected to the wire winding member.

3. The wire winding mechanism for a conveying device according to claim 2, characterized in that, The wire winding mechanism further includes a direction limiting component for restricting the one-way rotation of the driving knob. The direction limiting component includes: A first annular inclined rack installed on the housing; A locking block provided with a second annular inclined rack that can mesh with the first annular inclined rack; and A first elastic member, one end of which is connected to the locking block and the other end is connected to the driving knob. The first elastic member provides a driving force for the locking block to make the first annular inclined rack and the second annular inclined rack abut and mesh tightly.

4. The wire winding mechanism for a conveying device according to claim 2, characterized in that, The wire winding mechanism further includes an overload protection component for restricting the rotation stroke of the driving knob. The overload protection component includes: A first annular rack installed on the wire winding member; A force unloading block provided with a second annular rack that can mesh with the first annular rack; and A second elastic member, one end of which is connected to the force unloading block and the other end is connected to the driving knob. The second elastic member is used to provide a driving force for the force unloading block to make the first annular rack and the second annular rack abut and mesh tightly.

5. A conveying device for conveying an implantable device, the implantable device including a body and a wire rope connected to the body, characterized in that, The conveying device includes: A housing. In the loading state, the implantable device is connected to the housing through the wire rope; The wire winding mechanism for the conveying device according to any one of claims 1-4, installed on the housing. One end of the wire rope is connected to the body, and the other end axially extends in the housing, winds around the reversing member, and then is connected to the wire winding member; The driving member drives the wire winding member to rotate around the longitudinal central axis of the housing to wind the wire rope to fix the shape of the body.

6. A conveying system, characterized in that, It includes: An implantable device, which includes a body and a wire rope connected to the body; The conveying device according to claim 5. In the loading state, the implantable device is connected to the housing through a wire rope; One end of the wire rope is connected to the body, and the other end axially extends in the housing, winds around the reversing member, and then is connected to the wire winding member; The driving member drives the wire winding member to rotate around the longitudinal central axis of the housing to wind the wire rope to fix the shape of the body.

7. The conveying system according to claim 6, characterized in that, The implantable device further includes an adjustment wire. The body includes a first occlusion disc and a second occlusion disc which are oppositely arranged. One end of the adjustment wire is connected to the first occlusion disc, and the other end passes through the second occlusion disc. One end of the cord is connected to the first occlusion disc or the second occlusion disc, and the other end axially extends in the housing, winds around the commutation member and then is connected to the wire take-up member. A preformed knot sleeving on the adjustment wire is formed on the cord. The preformed knot is located on the side of the second occlusion disc away from the first occlusion disc. The cord is wound up to lock the preformed knot to fix the adjustment wire.

8. The conveying system according to claim 7, characterized in that, The delivery system further includes a holding tube which is sleeved on the adjustment wire and the cord, and the distal end of the holding tube abuts against the preformed knot, and the other end abuts against the housing.

9. The conveying system according to claim 7, characterized in that, The delivery system further includes a protection tube which is sleeved on the adjustment wire, and the preformed knot is sleeved on the protection tube. The protection tube can axially slide along the adjustment wire to separate the preformed knot from the protection tube.

10. The conveying system according to claim 6, characterized in that, The delivery system further includes an external sheath tube. The external sheath tube is a hollow tube. One end thereof is movably connected to the housing, and the other end extends towards the side where the implantable device is located. The implantable device is accommodated in the external sheath tube after being compressed.

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