WO2025045081A1 - Prosthesis conveying apparatus and prosthesis system - Google Patents

Abstract

A prosthesis conveying apparatus and a prosthesis system. The prosthesis conveying apparatus (1) comprises a handle shell (11), a control wire (12), a moving shaft (13), and a driving handle (14); the distal end of the control wire (12) is used for being connected to a prosthesis; the moving shaft (13) is movably accommodated in the handle shell (11) and is used for driving the control wire to move, so as to drive the state of the prosthesis to be changed; the driving handle (14) can rotate relative to the handle shell so as to drive the moving shaft to move to transmit external torque to the prosthesis; the driving handle (14) comprises an overload protection component (141); the overload protection component is used for transmitting torque, which does not exceed a threshold, to the moving shaft and preventing torque exceeding the threshold from being transmitted to the moving shaft. By means of the overload protection component, the prosthesis conveying apparatus solves the problems that the control wire is broken, the prosthesis fails and is damaged, or a human tissue is injured, etc., as a result of a too large force being applied when the driving handle operates the prosthesis at a distal end, thereby improving the reliability of the prosthesis system and the operation safety.

Description

Prosthesis delivery device and prosthesis system

Cross-references

This application is based on the Chinese patent applications with application numbers "202311110606.6" and "202322359283.6" and application date of August 30, 2023, and claims the priority of the above-mentioned Chinese patent applications. The entire contents of the above-mentioned Chinese patent applications are hereby incorporated into this application by introduction.

Technical Field

The present application belongs to the field of medical device technology, and more specifically, relates to a prosthesis delivery device and a prosthesis system.

Background Art

Minimally invasive treatment methods have the advantages of small wounds, less harm to patients, and fast postoperative recovery, so they are welcomed by the majority of patients. In minimally invasive treatment methods, prosthesis implantation is an important component. Generally speaking, the prosthesis system includes a delivery device and an implanted prosthesis located at the distal end of the delivery device. During the operation, the operator manipulates the delivery device to deliver the implanted prosthesis to the target location through natural cavities of the human body such as veins or other delivery pathways. When the implanted prosthesis is released, the delivery device is separated from the implanted prosthesis, and then the delivery device is withdrawn to complete the interventional operation.

U.S. Patent No. 10076327B2 discloses a device, system and method for tissue approximation and treatment site repair. There are many problems with the technology related to this patent. For example, when the implanted prosthesis (such as a mitral valve clip) of the device is in a locked state, the unexpected rotation of the handle threaded rotor will cause the implanted prosthesis to be subjected to unexpected force, which can easily cause the implanted prosthesis to fail in the locked state; for example, when the lock is released, the implanted prosthesis will be damaged or bounced due to the sudden release of the force; for example, during the operation, the rotating handle threaded rotor will generate excessive force on the control wire (and the implanted prosthesis), and the excessive force/torque will cause the control wire to break, or the implanted prosthesis to fail or be damaged, and may also cause damage to human tissue.

Summary of the invention

The purpose of the embodiments of the present application is to provide a prosthesis delivery device and a prosthesis system to solve one or more of the above-mentioned technical problems.

To achieve the above-mentioned purpose, the technical solution adopted in the present application is: the first aspect of the present application provides a prosthesis delivery device, comprising: a handle shell; a control wire, the distal end of which is used to connect with the prosthesis; a movable shaft, movably accommodated in the handle shell, and used to drive the prosthesis to change state by driving the control wire to move; a driving handle, which can be rotated relative to the handle shell to drive the movable shaft to move and transmit external torque to the prosthesis, and the driving handle includes an overload protection component, and the overload protection component is configured to transmit a torque not exceeding a threshold to the movable shaft, and prevent a torque above the threshold from being transmitted to the movable shaft.

In one embodiment, the driving handle further includes a transmission member, the transmission member is threadedly engaged with the movable shaft to drive the movable shaft to move, and the overload protection component is sleeved on the outer side of the transmission member.

In one embodiment, the overload protection assembly includes a support member, a passive member and an active member, wherein the passive member is configured to be stationary relative to the transmission member in the circumferential direction and movable relative to the transmission member in the axial direction; the active member is configured to be stationary relative to the transmission member in the axial direction and movable relative to the transmission member in the circumferential direction; the support member is used to keep the passive member and the active member in axial contact;

The passive component includes a first abutting surface, and the active component includes a second abutting surface. The first abutting surface and the second abutting surface are arranged correspondingly. The first abutting surface and the second abutting surface are planes at least in the abutting position, and the planes are not parallel to the axis of the driving handle.

In one embodiment, both the first abutting surface and the second abutting surface are planes perpendicular to the axis of the driving handle.

In one embodiment, the first abutting surface includes a first vertical surface, a first horizontal surface and a first inclined surface connected in sequence; the second abutting surface includes a second vertical surface, a second horizontal surface and a second inclined surface connected in sequence; the first vertical surface and the second vertical surface are both planes parallel to the axis of the driving handle, the first horizontal surface and the second horizontal surface are both planes perpendicular to the axis of the driving handle, the first inclined surface and the second inclined surface are both planes arranged at an angle to the axis of the driving handle, and the arrangement angle of the first inclined surface is the same as the arrangement angle of the second inclined surface.

In one embodiment, the first abutting surface includes a third inclined surface and a fifth inclined surface connected to the third inclined surface, and the third inclined surface and the fifth inclined surface are set at an obtuse angle; the second abutting surface includes a fourth inclined surface and a sixth inclined surface connected to the fourth inclined surface, and the fourth inclined surface and the sixth inclined surface are set at an obtuse angle; the third inclined surface and the fourth inclined surface are both planes arranged at an angle to the axis of the driving handle, and the arrangement angle of the third inclined surface is the same as the arrangement angle of the fourth inclined surface, and the fifth inclined surface and the sixth inclined surface are both planes arranged at an angle to the axis of the driving handle, and the arrangement angle of the fifth inclined surface is the same as the arrangement angle of the sixth inclined surface.

In one embodiment, the overload protection assembly includes a support member, a passive member and an active member, wherein the passive member is configured to be stationary relative to the transmission member in the circumferential direction and movable relative to the transmission member in the axial direction; the active member is configured to be stationary relative to the transmission member in the axial direction and movable relative to the transmission member in the circumferential direction; the support member is used to keep the passive member and the active member in axial contact;

The passive component includes a first abutting surface, and the active component includes a second abutting surface. The first abutting surface and the second abutting surface are arranged correspondingly. At least one of the first abutting surface and the second abutting surface is a curved surface at the abutting position, and the first abutting surface and the second abutting surface are circumscribed at the abutting position, and the circumscribed surface is not parallel to the axis of the driving handle.

In one embodiment, the passive component includes a first body and a first abutting portion, the first body is located at the distal end of the first abutting portion, and the first abutting surface is disposed at the proximal end surface of the first abutting portion;

The active member includes a second body and a second abutment portion, wherein the second body is located at the proximal end of the second abutment portion. The second abutting surface is arranged on a distal end surface of the second abutting portion.

In one embodiment, the radial dimension of the first abutting portion is greater than the radial dimension of the first body, and a first blocking shoulder is formed at the connection between the first abutting portion and the first body, and the first blocking shoulder is used to abut against the support member.

In one embodiment, the overload protection assembly also includes a accommodating seat, which is fixedly sleeved on the outside of the transmission member, and the support member, the active member and the passive member are coaxially sleeved on the outer surface of the accommodating seat; the accommodating seat includes a distal part, a middle part and a proximal part; the radial dimension of the distal part is larger than the radial dimension of the middle part, forming a distal shoulder, the radial dimension of the middle part is larger than the radial dimension of the proximal part, forming a proximal shoulder, the distal shoulder is used to support the support member, and the proximal shoulder is used to abut the passive member to limit and prevent the passive member from moving too much toward the distal part.

In one embodiment, the support member is a compression spring, one end of the compression spring abuts against the distal shoulder, and the other end of the compression spring abuts against the first blocking shoulder.

In one embodiment, a first anti-rotation groove is provided on the first body of the passive component, and a first anti-rotation pin is provided on the outer surface of the proximal portion, and the first anti-rotation pin can be axially movably accommodated in the first anti-rotation groove.

In one embodiment, the overload protection assembly further includes a transmission housing, which is coaxially sleeved on the outside of the active member to receive external torque and transmit it to the active member, and the active member is configured to remain circumferentially stationary relative to the transmission housing.

In one embodiment, a second anti-rotation groove is provided on the second body of the active member, and a second anti-rotation pin is provided on the inner wall of the transmission housing, and the second anti-rotation pin is axially movably accommodated in the second anti-rotation groove.

In one embodiment, an outer surface of the transmission housing is provided with an anti-slip structure.

In one embodiment, the overload protection assembly also includes a accommodating cover, the distal end of the accommodating cover has an axially extending coupling portion, the proximal end of the accommodating cover has a circumferentially extending blocking portion, the coupling portion is coupled to the proximal end of the accommodating seat to removably fix the accommodating cover to the accommodating seat, and the blocking portion is used to keep the active member axially stationary relative to the transmission member.

In one embodiment, the handle shell includes an inner cavity, the proximal end of the handle shell is provided with an opening, the distal end of the transmission member enters the inner cavity of the handle shell through the opening, and the transmission member is configured to only rotate relative to the handle shell.

In one embodiment, the transmission member has a limiting protrusion located at the distal end and a limiting ridge located proximal to the limiting protrusion, the limiting protrusion is circumferentially arranged on the transmission member and disposed inside the handle shell, the limiting ridge is circumferentially arranged on the transmission member and disposed outside the handle shell, and an opening groove is formed between the limiting protrusion and the limiting ridge; the opening is retracted to form an opening shoulder, and the opening shoulder is accommodated in the opening groove.

In one embodiment, the radial dimension of the limiting ridge is greater than the radial dimension of the limiting protrusion.

A second aspect of the present application provides a prosthesis system, comprising the prosthesis delivery device and the prosthesis as described above.

The prosthesis delivery device provided in the embodiment of the present application includes a handle housing, a control wire, a moving shaft and a driving handle, wherein the distal end of the control wire is used to connect with the prosthesis, the moving shaft is movably accommodated in the handle housing, and is used to drive the prosthesis to change state by driving the control wire to move, the driving handle can rotate relative to the handle housing to drive the moving shaft to move, and transmit the external torque to the prosthesis, and the driving handle includes an overload protection component, and the overload protection component is used to transmit a torque that does not exceed a threshold to the moving shaft, and prevent the torque above the threshold from being transmitted to the moving shaft. The prosthesis delivery device solves the problem of excessive force that is easy to occur when the driving handle operates the prosthesis at the distal end through the overload protection component. Excessive force/torque will cause the control wire to break, the prosthesis to fail or be damaged, and may also cause damage to human tissue. The prosthesis delivery device provided in the embodiment of the present application improves the reliability of the prosthesis system and the safety of operation.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of a partial structure of the proximal end of a prosthesis delivery device provided by one embodiment of the present application;

FIG2 is a cross-sectional view of the structure of a driving handle in a prosthesis delivery device provided by one embodiment of the present application;

FIG3 is a schematic diagram of the cooperation between the passive component and the active component in the prosthesis delivery device provided by one embodiment of the present application;

FIG4 is a schematic structural diagram of a passive component in a prosthesis delivery device provided in one embodiment of the present application;

FIG5 is a schematic diagram of the assembly of active components and passive components in a prosthesis delivery device provided by one embodiment of the present application;

FIG6 is a schematic structural diagram of the passive component, the active component and the receiving seat of the prosthesis delivery device provided by one embodiment of the present application after being assembled;

FIG. 7 is a schematic structural diagram of an overload protection assembly of a prosthesis delivery device provided in one embodiment of the present application;

FIG8 is a schematic diagram of the torque transmission principle of a prosthesis delivery device provided by one embodiment of the present application;

FIG9 is a schematic structural diagram of a mitral valve clip provided by an embodiment of the present application;

FIG10 is a schematic structural diagram of a mitral valve clip provided by an embodiment of the present application when the clip arms are closed;

FIG. 11 is a schematic diagram of the structure of a mitral valve clip provided by an embodiment of the present application when the clip arms are deployed.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

In the description of the present application, it should be understood that the terms "include" and "have" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

In addition, in the present application, unless otherwise clearly stipulated and limited, the terms "connect", "connected", "fixed", "installed", etc. should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

An embodiment of the present application provides a prosthesis delivery device including a handle housing, a control wire, a movable shaft and a driving handle; the distal end of the control wire is used to connect to the prosthesis; the movable shaft is movably accommodated in the handle housing, and is used to drive the prosthesis to change its state by driving the control wire to move; the driving handle is rotatable relative to the handle housing to drive the movable shaft to move and transmit external torque to the prosthesis, and the driving handle includes an overload protection component, which is configured to transmit a torque that does not exceed a threshold to the movable shaft, and prevent a torque above the threshold from being transmitted to the movable shaft.

The prosthesis delivery device in this embodiment solves the problem of excessive force applied by the driving handle to operate the distal prosthesis, resulting in breakage of the control wire, failure or damage of the prosthesis, or injury to human tissue through the overload protection component, thereby improving the reliability of the prosthesis system and the safety of operation.

A prosthesis system provided in yet another embodiment of the present application includes the above-mentioned prosthesis delivery device and a prosthesis.

In the following embodiments, the prosthesis is described in detail using a mitral valve clip for treating mitral valve regurgitation as an example to describe the prosthesis delivery device and prosthesis system provided by the present application. The fact that the prosthesis is a mitral valve clip for treating mitral valve regurgitation does not limit the scope of protection of the present application. For example, the prosthesis may also be a tricuspid valve clip, an abdominal aortic stent, a thoracic aortic stent, a left atrial appendage occluder, or an intracranial coil.

In each embodiment of the present application, the term "distal end" is defined as the end away from the operator during the surgical operation, and the "proximal end" is defined as the end close to the operator during the surgical operation. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "radial dimension" does not mean that the component, component or part must be a solid of revolution or a sphere; for components, components or parts under a solid of revolution or a sphere, "radial" refers to the vertical direction from the edge to the axis.

FIG1 is a schematic diagram of the local structure of the proximal end of a prosthesis delivery device provided in an embodiment of the present application, FIG2 is a schematic diagram of the structure of a driving handle in a prosthesis delivery device provided in an embodiment of the present application, FIG9 is a schematic diagram of the structure of a mitral valve clip provided in an embodiment of the present application, FIG10 is a schematic diagram of the structure of a mitral valve clip provided in an embodiment of the present application when the clamp arm is closed, and FIG11 is a schematic diagram of the structure of a mitral valve clip provided in an embodiment of the present application when the clamp arm is expanded. Please refer to FIG1, FIG2, and FIG9. The prosthesis system provided in this embodiment includes a prosthesis delivery device 1 and a prosthesis 2. In this embodiment, the prosthesis 2 is a mitral valve clip.

Please refer to Figures 1 and 2. The delivery device 1 provided in this embodiment includes a handle shell 11, a control wire 12, a movable shaft 13 and a driving handle 14. The distal end of the control wire 12 is used to connect with the prosthesis. The movable shaft 13 is movably accommodated in the handle shell 11, and is used to drive the prosthesis to change its state by driving the control wire 12 to move. The driving handle 14 can rotate relative to the handle shell 11 to drive the movable shaft 13 to move and transmit external torque to the prosthesis. The driving handle 14 includes an overload protection component 141. The overload protection component 141 is configured to transmit a torque that does not exceed a threshold to the movable shaft 13, and prevent a torque above the threshold from being transmitted to the movable shaft 13.

Here, the state change of the prosthesis may refer to the change of the shape, size, and posture relationship of the prosthesis as a whole, for example, the stent changes from a compressed state to a released state. Exemplarily, a binding wire is set on the abdominal aortic stent and the thoracic aortic stent, and the binding wire binds the abdominal aortic stent and the thoracic aortic stent to maintain the abdominal aortic stent and the thoracic aortic stent in a compressed state. When the abdominal aortic stent and the thoracic aortic stent are implanted in the target position, the control wire 12 pulls the binding wire to separate from the abdominal aortic stent and the thoracic aortic stent, so that the abdominal aortic stent and the thoracic aortic stent become a released state. The state change of the prosthesis may refer to the change of the connection relationship between the prosthesis and the delivery device and the target tissue, for example, from a connected state to a separated state. Exemplarily, when delivering the left atrial appendage occluder and the intracranial coil, the control wire 12 is in a connected state with the left atrial appendage occluder and the intracranial coil. After the left atrial appendage occluder and the intracranial coil are released, the control wire 12 is driven to separate from the left atrial appendage occluder and the intracranial coil, and the left atrial appendage occluder and the intracranial coil are in a released state. The state change of the prosthesis may also be a change in the shape or size of some components, parts, or parts of the prosthesis, or a change in position relative to the rest of the prosthesis. For example, referring to Figures 9 to 11, in this embodiment, the axial movement of the control wire 12 drives the clamp arm 22 of the mitral valve clip Swing. "Pose" includes position and/or attitude.

When the delivery device of this embodiment is used in the treatment of mitral valve regurgitation surgery, the prosthesis delivery device 1 transmits a torque that does not exceed the threshold to the movable shaft 13 through the overload protection component 141, and prevents the torque above the threshold from being transmitted to the movable shaft 13, which can solve the problem of excessive force that is easy to occur when the driving handle 14 opens or closes the distal mitral valve clip. When excessive force/torque is transmitted to the distal mitral valve clip, it may cause the control wire 12 to break, or cause the angle of expansion or closing of the clamp arm 22 in the mitral valve clip to exceed the physical limit, thereby damaging or failing the mitral valve clip. At the same time, the mitral valve clip may break the edges of the anterior and posterior lobes of the mitral valve, causing damage to the mitral valve leaflets.

Referring to Figures 9 to 11, the prosthesis 2 (in this embodiment, a mitral valve clip) includes a central base 21, a clamping arm 22 at the distal end, and a clamping member 23 at the proximal end. A clamping space for accommodating the leaflets 3 of the mitral valve is formed between the clamping arm 22 and the clamping member 23. The clamping arm 22 and the clamping member 23 can respectively open and close (i.e., change state) around the axis of the central base 21 to change the clamping space and clamp or release the leaflets 3 (i.e., the anterior leaflet and the posterior leaflet) of the mitral valve. For example, the clamp arm 22 rotates toward the distal end, the clamp member 23 rotates toward the proximal end, and the clamp arm 22 and the clamp member 23 perform an opening movement to expand the clamping space, so that the mitral valve leaflet 3 can enter the clamping space; then, the clamp arm 22 rotates toward the proximal end, the clamp member 23 rotates toward the distal end, and the clamp arm 22 and the clamp member 23 perform a closing movement to reduce the clamping space, and finally the clamp arm 22 and the clamp member 23 are tightly attached to achieve clamping of the mitral valve leaflet 3. The clamp arm 22 of the mitral valve clip of this embodiment includes a first clamp arm 221 and a second clamp arm 222, and the first clamp arm 221 and the second clamp arm 222 are symmetrically arranged about the axis of the central base 21. Accordingly, the clamping member 23 of the mitral valve frame of this embodiment includes a first clamping member 231 and a second clamping member 232. The first clamping member 231 is used to cooperate with the first clamping arm 221 to clamp one leaflet 3 in the mitral valve, and the second clamping member 232 is used to cooperate with the second clamping arm 222 to clamp another leaflet 3 in the mitral valve. In this embodiment, the central base 21 is detachably connected to the distal end of the conveying device. This embodiment does not limit the specific implementation method of the detachable connection.

The prosthesis 2 further comprises an actuating assembly 24, which is used to drive the clamping arm 22 to perform an opening and closing movement around the central base 21 under the drive of the control wire 12, so that the clamping arm 22 clamps or releases the leaflet 3 of the mitral valve under the cooperation of the clamping member 23. Specifically, the actuating assembly 24 of this embodiment comprises a first connecting rod 241, a second connecting rod 242 and a base 243, wherein one end of the first connecting rod 241 is rotatably connected to the first clamping arm 221, and the other end is rotatably connected to the base 243; one end of the second connecting rod 242 is rotatably connected to the second clamping arm 222, and the other end is rotatably connected to the base 243, and the base 243 comprises a horizontal part and a vertical part, wherein the two ends of the horizontal part are respectively connected to the first connecting rod 241 and the second connecting rod 242, and the vertical part is accommodated in the hollow central base 21 and can move relative to the central base 21. Specifically, the base 243 of the present embodiment is in a "T" shape, and the two ends of the horizontal part of the base 243 are respectively connected to the first connecting rod 241 and the second connecting rod 242, and the vertical part is accommodated in the central base 21 and can move relative to the central base 21. For example, the first connecting rod 241, the second connecting rod 242, the first clamp arm 221, the second clamp arm 222, the base 243, and the central base 21 form a connecting rod structure in a pin-connected manner, and the vertical part is detachably connected to the control wire 12. Under the action of the control wire 12, the base 243 moves relative to the central base 21, thereby causing the first clamp arm 221 and the second clamp arm 222 to rotate to achieve clamping of the edge of the leaflet 3 of the mitral valve. In the present embodiment, when the base 243 moves proximally relative to the central base 21 under the action of the control wire 12, the first clamp arm 221 and the second clamp arm 222 move proximally. Rotate to clamp the edge of the leaflet 3 of the mitral valve.

Exemplarily, the distal end of the control wire 12 has an external thread, and correspondingly, the vertical portion has an internal thread matching therewith, and the control wire 12 and the vertical portion of the base 243 are detachably connected by the threaded cooperation of the external thread and the internal thread. Of course, in other alternative embodiments, the distal end of the control wire 12 may be provided with an internal thread, and the vertical portion of the base 243 may be provided with an external thread matching therewith.

Continuing to refer to FIG. 1 and FIG. 2 , in this embodiment, the movable shaft 13 is configured to be only axially movable relative to the handle housing 11, and the driving handle 14 is configured to be only rotationally movable relative to the handle housing 11, and the axial movement of the movable shaft 13 is driven by the rotational movement of the driving handle 14. Exemplarily, the handle housing 11 includes an inner cavity, and the proximal end of the handle housing 11 is provided with an opening, which is retracted to form an opening shoulder 111. The driving handle 14 includes a hollow transmission member 142, and the distal end of the transmission member 142 is provided with an opening groove 1423 extending circumferentially, and the opening shoulder 111 is accommodated in the opening groove 1423, so that the driving handle 14 is restricted and can only rotate relative to the handle housing 11. In one example, the transmission member 142 has a limiting protrusion 1421 at the distal end, the limiting protrusion 1421 is circumferentially arranged on the transmission member 142, and is disposed inside the handle housing 11; on the proximal side of the limiting protrusion 1421, the transmission member 142 is provided with a limiting ridge 1422, the limiting ridge 1422 is circumferentially arranged on the transmission member 142, and is disposed outside the handle housing 11. In this way, the above-mentioned opening groove 1423 is formed between the limiting protrusion 1421 and the limiting ridge 1422.

In this embodiment, the distal end of the movable shaft 13 enters the inner cavity of the handle housing 11 through an opening at the proximal end of the handle housing 11, and the distal end of the movable shaft 13 passes through the transmission member 142. A first limiting member is provided on the outer side of the distal end of the movable shaft 13, and a second limiting member is provided on the handle housing 11 at a corresponding position. The first limiting member and the second limiting member are configured to be connected along the axial movement of the driving handle 14, so that the movable shaft 13 is limited and can only move axially relative to the driving handle 14. In one example, the first limiting member is a protrusion, and the second limiting member is a groove extending along the axial direction. The protrusion is movably accommodated in the groove, so that the movable shaft 13 is limited and can only move axially relative to the driving handle 14. The inner wall of the transmission member 142 is provided with an internal thread, and correspondingly, the outer wall of the movable shaft 13 is provided with an external thread. Through the threaded cooperation of the two, the axial movement of the movable shaft 13 is driven by the rotation of the driving handle 14.

As described above, in the present embodiment, the control wire 12 and the movable shaft 13 remain relatively stationary in the axial direction, and the torque applied to the movable shaft 13 is transmitted to the mitral valve clip connected to the control wire 12 at the distal end, so as to realize the opening and closing of the clamping arms in the mitral valve clip (i.e., the change of the state of the mitral valve clip). In other embodiments, the movement of the control wire 12 realizes the release of the prosthesis 2 from the delivery device 1, or realizes the adjustment of the position of the prosthesis 2, or realizes the change of the loading of the prosthesis 2 (for example, from a compressed state to an expanded state), etc. The control wire 12 of the present embodiment can be made of metal wire. For example, the control wire 12 is made of nickel titanium or stainless steel.

In this embodiment, the movable shaft 13 is provided with a receiving cavity, and the proximal end of the control wire 12 is fixedly received in the receiving cavity, so that the control wire 12 and the movable shaft 13 remain relatively stationary in the axial direction. In an alternative embodiment, the prosthesis delivery device further includes a wire clamping shaft, which is used to fix the control wire 12, and the wire clamping shaft is rotatably received in the receiving cavity of the movable shaft 13. When the shaft 13 drives the control wire 12 to move axially, the wire clamping shaft and the moving shaft are fixed by fixing parts such as latches.

In this embodiment, the overload protection component 141 is sleeved on the outside of the transmission member 142, and the overload protection component 141 is used to transmit a torque that does not exceed a threshold value to the transmission member 142, and prevent a torque that exceeds the threshold value from being transmitted to the transmission member 142. In this embodiment, the torque applied to the overload protection component 141 is transmitted to the moving shaft 13 through the transmission member 142, and then transmitted to the mitral valve clip through the control wire 12 to realize the opening and closing of the clip arm 22.

Please refer to Figures 2 to 5. The overload protection assembly 141 includes a support member 41, a passive member 42 and an active member 43. The passive member 42 is configured to remain circumferentially stationary relative to the transmission member 142 and can move axially relative to the transmission member 142; the active member 43 is configured to remain axially stationary relative to the transmission member 142 and can rotate circumferentially relative to the transmission member 142; the support member 41 is used to keep the passive member 42 and the active member 43 in axial contact. In this embodiment, the passive member 42 and the active member 43 respectively include a first contact surface A and a second contact surface B, that is, the passive member 42 includes a first contact surface A, and the active member 43 includes a second contact surface B. The first contact surface A and the second contact surface B are correspondingly arranged, and the first contact surface A and the second contact surface B are planes at least in the contact portion, and the planes are not parallel to the axis of the driving handle 14. The present embodiment has no particular restrictions on the angle between the plane and the axis of the driving handle 14, and can be set according to factors such as the material of the passive member 42 and the active member 43, the static friction coefficient, the threshold of the torque, and the force provided by the support member 41. For example, the first abutting surface A and the second abutting surface B are both planes perpendicular to the axis of the driving handle 14. For another example, as shown in Figure 4, the first abutting surface A of the passive member 42 includes a first vertical surface, a first horizontal surface, and a first inclined surface connected in sequence, and the first vertical surface, the first horizontal surface, and the first inclined surface define a first meshing tooth with a cross section of a right-angled trapezoid. At the corresponding position, the second abutting surface B of the active member 43 includes a second vertical surface, a second horizontal surface, and a second inclined surface connected in sequence, and the second vertical surface, the second horizontal surface, and the second inclined surface define a second meshing tooth with a cross section of a right-angled trapezoid. The first vertical plane and the second vertical plane are both planes parallel to the axis of the driving handle 14, the first horizontal plane and the second horizontal plane are both planes perpendicular to the axis of the driving handle 14, the first inclined plane and the second inclined plane are both planes arranged at an angle to the axis of the driving handle 14, and the arrangement angle of the first inclined plane is the same as the arrangement angle of the second inclined plane, the first vertical plane is configured to abut against the second vertical plane, the first horizontal plane is configured to abut against the second horizontal plane, and the first inclined plane is configured to be arranged parallel to the second inclined plane and abut against the second inclined plane. When the first abutting surface A and the second abutting surface B of this embodiment abut, the first meshing teeth of the right-angled trapezoidal shape and the second meshing teeth of the right-angled trapezoidal shape are meshed, when the passive component 42 and the active component 43 rotate in one direction, the first horizontal plane abuts against the second horizontal plane, and the first inclined plane abuts against the second inclined plane, which can prevent overload; when the passive component 42 and the active component 43 rotate in another direction, the first vertical plane abuts against the second vertical plane, and it is impossible to prevent overload. See the following description for details. In another embodiment, the first abutting surface A of the passive component 42 includes a third inclined surface and a fifth inclined surface connected to the third inclined surface, the third inclined surface and the fifth inclined surface are set at an obtuse angle, and the third inclined surface and the fifth inclined surface are connected to define a third meshing tooth with a triangular cross-section. At a corresponding position, the second abutting surface B includes a fourth inclined surface and a sixth inclined surface connected to the fourth inclined surface, the fourth inclined surface and the sixth inclined surface are set at an obtuse angle, and the fourth inclined surface and the sixth inclined surface are connected to define a fourth meshing tooth with a triangular cross-section. The third inclined surface and the fourth inclined surface are both planes arranged at an angle to the axis of the driving handle 14, and the arrangement angle of the third inclined surface is the same as the arrangement angle of the fourth inclined surface, the fifth inclined surface and the sixth inclined surface are both planes arranged at an angle to the axis of the driving handle 14, and the fifth inclined surface is The arrangement angle of the surface is the same as the arrangement angle of the sixth inclined surface, that is, the third inclined surface is configured to be arranged in parallel with the fourth inclined surface, and is used to abut with the fourth inclined surface, and the fifth inclined surface is configured to be arranged in parallel with the sixth inclined surface, and is used to abut with the sixth inclined surface. In this way, when the first abutting surface A and the second abutting surface B abut, the third meshing tooth of the triangular shape meshes with the fourth meshing tooth of the triangular shape, and when the passive component 42 and the active component 43 rotate in two directions, the third inclined surface abuts with the fourth inclined surface, or the fifth inclined surface abuts with the sixth inclined surface, and overload prevention can be achieved. In addition to surface contact, the first abutting surface A and the second abutting surface B can also be line contact or point contact. In an alternative embodiment, the first abutting surface A and the second abutting surface B are arranged correspondingly, and at least one of the first abutting surface A and the second abutting surface B is a curved surface at the abutting position, and the first abutting surface A and the second abutting surface B are circumscribed at the abutting position, and the circumscribed surface is not parallel to the axis of the driving handle 14. For example, the first abutting surface A is in an arc shape, and the second abutting surface B is also in an arc shape, and the radii of the two are equal. For another example, the shapes of the first abutting surface A and the second abutting surface B can refer to the gear tooth shape in the external meshing gear set. In one example, the first abutting surface A and the second abutting surface B can also be sandblasted to increase the surface roughness.

Please continue to refer to Figures 2 to 5. The passive member 42 is a hollow structure and is located at the proximal end of the transmission member 142. The passive member includes a first body 421 and a first abutting portion 422, and the first body 421 is located at the distal end of the first abutting portion 422. The first abutting surface A is arranged at the proximal end face of the first abutting portion 422. In one example, the radial dimension of the first abutting portion 422 is greater than the radial dimension of the first body 421, so that the contact area of the first abutting surface A can be increased, and a first blocking shoulder 423 can be formed at the connection between the first abutting portion 422 and the first body 421, and the first blocking shoulder 423 is used to abut the support member 41. Correspondingly, the active member 43 is also a hollow structure and is located at the proximal end of the passive member. The active member includes a second body 431 and a second abutting portion 432, and the second body 431 is located at the proximal end of the second abutting portion 432. The second abutting surface B is arranged at the distal end face of the second abutting portion 432. In an example, the radial dimension of the second abutting portion 432 may also be greater than the radial dimension of the second body 431 , so as to increase the contact area of the second abutting surface B.

In this embodiment, the overload protection component 141 also includes a accommodating seat 44, which is a hollow structure and is fixedly mounted on the outer side of the transmission member 142. As the basis of the overload protection component 141, the support member 41, the passive member 42 and the active member 43 are all mounted on the outer surface of the accommodating seat 44. And at least the active member 43 can rotate circumferentially relative to the accommodating seat 44. The accommodating seat 44 of this embodiment is fixedly connected to the transmission member 142 by welding, bonding, etc. In other embodiments, the accommodating seat 44 can be integrally formed with the transmission member 142.

Please continue to refer to Figure 2. The accommodating seat 44 of this embodiment includes a distal portion 442, a middle portion 441 and a proximal portion 443. The radial dimension of the distal portion 442 is greater than the radial dimension of the middle portion 441, forming a distal shoulder; the radial dimension of the middle portion 441 is greater than the radial dimension of the proximal portion 443, forming a proximal shoulder. Among them, the distal shoulder is used to support the support member 41. The proximal shoulder is used to abut the passive member 42 to limit and prevent the passive member 42 from moving too far toward the distal portion 442. The distal shoulder of this embodiment can provide support for the support member 41, and the support member 41 elastically supports the passive member 42, which is used to keep the passive member 42 and the active member 43 in abutment, and provide axial movement limitation for the passive member 42 and the active member 43. In one example, the distal portion 442 is fixedly connected to the limiting ridge 1422 to increase the fixing effect between the accommodating seat 44 and the transmission member 142. In one example, the radial dimension of the distal portion 442 is equal to the radial dimension of the limiting ridge 1422. This does not mean that the limiting ridge 1422, the distal portion 442, the middle portion 441 and the proximal portion 443 must have a circular outer contour; for non-circular parts, "radial" refers to the perpendicular direction from the edge to the axis.

Please continue to refer to FIG. 1 and FIG. 2 . In this embodiment, the radial dimension of the limiting ridge 1422 is greater than the radial dimension of the limiting protrusion 1421. In this way, increasing the area of the limiting ridge 1422 can not only increase the limiting effect of the limiting ridge 1422 on the axial movement of the handle housing 11, but also increase the fixed connection area between the limiting ridge 1422 and the distal end portion 442 of the receiving seat 44, so as to further increase the fixing effect between the receiving seat 44 and the transmission member 142.

Please refer to Fig. 2, the support member 41 is a compression spring, one end of which abuts against the distal shoulder of the accommodating seat 44, and the other end of which abuts against the first blocking shoulder 423 of the passive member 42. The support member 41 of this embodiment is a compression spring. The compression spring is easy to obtain and has low cost.

Please refer to Fig. 3 to Fig. 6. The first body 421 of the passive member 42 is provided with an axially extending first anti-rotation groove 4211. The outer surface of the proximal portion 443 of the receiving seat 44 is provided with a first anti-rotation pin 4411. The first anti-rotation pin 4411 is configured to be axially movably received in the first anti-rotation groove 4211. In this way, the passive member 42 of this embodiment can remain circumferentially stationary relative to the receiving seat 44, and can move axially relative to the receiving seat 44. Since the receiving seat 44 is fixedly connected to the transmission member 142, the passive member 42 can remain circumferentially stationary relative to the transmission member 142, and can move axially relative to the transmission member 142.

In the present embodiment, the overload protection assembly 141 further includes a transmission housing 45, which is coaxially sleeved on the outside of the active member 43 to receive external torque and transmit it to the active member 43. The active member 43 is configured to remain circumferentially stationary relative to the transmission housing 45. The active member 43 of the present embodiment can rotate synchronously with the transmission housing 45. The operator drives the active member 43 to rotate by driving the transmission housing 45, and the active member 43 drives the passive member 42 to rotate, and the passive member 42 synchronously drives the accommodating seat 44 and the transmission member 142 to rotate. In one example, the transmission housing 45 can also cover the passive member 42, the accommodating seat 44, etc. to prevent foreign matter from entering. Please refer to Figure 7. In one example, the outer surface of the transmission housing 45 is provided with an anti-skid structure 452, and the anti-skid structure 452 can increase the friction when the operator applies torque to the transmission housing 45 to prevent slipping.

Please continue to refer to Figures 2 to 7. The second body 431 of the active member 43 is provided with an axially extending second anti-rotation groove 4311, and the inner wall of the transmission housing 45 is provided with a second anti-rotation pin 451, which can be axially movably accommodated in the second anti-rotation groove 4311. In this embodiment, by providing the second anti-rotation groove 4311 on the second body 431 and the second anti-rotation pin 451 on the inner wall of the transmission housing 45, the two cooperate to achieve that the active member 43 and the transmission housing 45 remain relatively stationary in the circumferential direction and rotate synchronously, and the implementation method is simple. In other alternative embodiments, the active member 43 can also be fixedly connected to the transmission housing 45.

The present embodiment does not impose any special restrictions on the specific number of the first anti-rotation groove 4211 and the first anti-rotation pin 4411, as well as the specific number of the second anti-rotation groove 4311 and the second anti-rotation pin 451. In one example, the number of the first anti-rotation groove 4211 and the first anti-rotation pin 4411 are both multiple, and the multiple first anti-rotation grooves 4211 are evenly spaced in the circumferential direction of the first body 421; the number of the second anti-rotation groove 4311 and the second anti-rotation pin 451 are both multiple, and the multiple second anti-rotation grooves 4311 are evenly spaced in the circumferential direction of the second body 431. The number of the first anti-rotation groove 4211 and the first anti-rotation pin 4411, as well as the second anti-rotation groove The number of the first anti-rotation groove 4211 and the second anti-rotation pin 451 is set to be multiple, which can improve the overall structural strength of the overload protection component 141. For example, the number of the first anti-rotation groove 4211 and the first anti-rotation pin 4411 are both two, and the two first anti-rotation grooves 4211 are symmetrically arranged about the central axis of the passive component 42. For another example, the number of the second anti-rotation groove 4311 and the second anti-rotation pin 451 are both two, and the two second anti-rotation grooves 4311 are symmetrically arranged about the central axis of the active component 43.

Please continue to refer to FIG. 2 . The overload protection assembly 141 also includes a housing cover 46. The distal end of the housing cover 46 has a coupling portion 461, and the proximal end of the housing cover 46 has a blocking portion 462. The coupling portion 461 is used to couple with the proximal end of the housing seat 44 to detachably fix the housing cover 46 on the housing seat 44. The blocking portion 462 is used to keep the active member 43 axially stationary relative to the transmission member 142. In one example, the housing cover 46 and the housing seat 44 are coupled by a snap-on or threaded connection. As shown in FIG. 2 , the coupling portion 461 is provided with an external thread, and the proximal end portion of the housing seat 44 is provided with an internal thread, and the two are threadedly connected. In one example, the radial dimension of the blocking portion 462 is greater than the radial dimension of the second body 431 of the active member 43, thereby forming a second blocking shoulder. When the coupling portion 461 is threadedly connected to the proximal end portion, the second blocking shoulder abuts against the proximal end of the second body 431, so that the blocking portion 462 can prevent the active member 43 and the transmission housing 45 from axially moving under the cooperation of the support member 41.

The overload protection principle of the overload protection component in the prosthesis delivery device of this embodiment is described below in conjunction with FIG. 2 to FIG. 8:

The external torque is transmitted to the active member 43 through the cooperation of the second stop pin 451 and the second stop groove 4311, and then transmitted to the passive member 42 through the cooperation of the second meshing teeth with a right-angled trapezoidal cross section and the first meshing teeth with a right-angled trapezoidal cross section. The passive member 42 transmits the torque to the accommodating seat 44 through the cooperation of the first stop pin 4411 and the first stop groove 4211, and then the accommodating seat 44 transmits the torque to the transmission member 142. The transmission member 142 rotates, and through the threaded transmission, the movable shaft 13 and the control wire 12 move axially toward the distal end (or proximal end).

1) When a counterclockwise torque is applied to the transmission housing 45 (as shown in FIGS. 5 and 7 , observed from the proximal end to the distal end), the first vertical surface in the first abutting surface A on the first meshing tooth of the passive component 42 and the second vertical surface in the second abutting surface B on the second meshing tooth of the active component 43 abut against each other. Since the first vertical surface and the second vertical surface are parallel to the axis, that is, perpendicular to the tangential direction of rotation of the passive component 42 and the active component 43, no matter how large the torque is transmitted, the force direction of the passive component 42 is always along the tangential direction without axial force, and the passive component 42 and the active component 43 will never rotate relative to each other (that is, "slipping"). Therefore, the overload protection component 141 with a right-angled trapezoidal first meshing tooth and a right-angled trapezoidal cross-section has no overload protection function when transmitting a counterclockwise torque.

2) When a clockwise torque is applied to the transmission housing 45, the second inclined surface in the second abutting surface B on the second meshing tooth of the active component 43 abuts the first inclined surface in the first abutting surface A on the first meshing tooth of the passive component 42, or the second horizontal surface in the second abutting surface B on the second meshing tooth of the active component 43 abuts the first horizontal surface in the first abutting surface A on the first meshing tooth of the passive component 42.

As shown in FIG. 8 , the active member 43 transmits torque to the passive member 42 through the contact between the second inclined surface and the first inclined surface.

Among them, F _torque is the torque corresponding to the external torque;

_Ftorque-1 is the component of _Ftorque along the first inclined plane;

_Ftorque-2 is the component of _Ftorque perpendicular to the direction of the first inclined plane.

_Pressure F is the reaction force of the active member 43 on the passive member 42 generated by the passive member 42 abutting against the active member 43 under the action of the support member 41;

_Fpressure-1 is the component of _Fpressure along the first inclined surface;

_Fpressure-2 is the component of _Fpressure perpendicular to the direction of the first inclined surface.

When the torque is not higher than the threshold, the combined force of Ftorque _-1 and _Fpressure-1 does not exceed the maximum static friction between the passive member 42 and the active member 43, that is, Ftorque _- 1 _-Fpressure-1 ≤( _Ftorque-2 + _Fpressure-2 )×f, where f is the static friction coefficient. At this time, the first meshing teeth of the passive member 42 and the second meshing teeth of the active member 43 remain meshed, and the torque is transmitted to the accommodating seat 44 and the transmission member 142. The cooperation between the transmission member 142 and the moving shaft 13 converts the rotational motion into the linear motion of the moving shaft 13 and the control wire 12.

When the torque is higher than the threshold, the combined force of Ftorque _-1 and _Fpressure-1 exceeds the maximum static friction between the passive component 42 and the active component 43, that is, _Ftorque-1 - _Fpressure-1 > ( _Ftorque-2 + _Fpressure-2 )×f, where f is the static friction coefficient. At this time, relative motion occurs in the circumferential direction between the passive component 42 and the active component 43, and the active component 43 cannot transmit the torque to the passive component 42, and idles and "slips", and the corresponding moving shaft 13 and the control wire 12 are no longer driven to move, thereby achieving the purpose of overload protection.

The prosthesis delivery device provided in the embodiment of the present application includes a handle housing, a control wire, a moving shaft and a driving handle, wherein the distal end of the control wire is used to connect with the prosthesis, the moving shaft is movably accommodated in the handle housing, and is used to drive the prosthesis to change state by driving the control wire to move, the driving handle can rotate relative to the handle housing to drive the moving shaft to move, and transmit the external torque to the prosthesis, and the driving handle includes an overload protection component, and the overload protection component is used to transmit a torque that does not exceed a threshold to the moving shaft, and prevent the torque above the threshold from being transmitted to the moving shaft. The prosthesis delivery device solves the problem of excessive force that is easy to occur when the driving handle operates the prosthesis at the distal end through the overload protection component. Excessive force/torque will cause the control wire to break, the prosthesis to fail or be damaged, and may also cause damage to human tissue. The prosthesis delivery device provided in the embodiment of the present application improves the reliability of the prosthesis system and the safety of operation.

In the above description, the description with reference to the terms "an embodiment", "some embodiments", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

The above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still apply the above embodiments to the present application. The technical solutions recorded in the examples are modified, or some or all of the technical features therein are replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims (20)

A prosthesis delivery device, comprising: Handle housing; A control wire, the distal end of which is used to connect with the prosthesis; A moving shaft, movably accommodated in the handle housing, and used to drive the prosthesis to change state by driving the control wire to move; The driving handle can be rotated relative to the handle housing to drive the movable shaft to move and transmit the external torque to the prosthesis. The driving handle includes an overload protection component, which is configured to transmit a torque not exceeding a threshold to the movable shaft and prevent a torque above the threshold from being transmitted to the movable shaft. The prosthesis delivery device according to claim 1, wherein: the driving handle also includes a transmission member, the transmission member is threadedly engaged with the movable shaft to drive the movable shaft to move, and the overload protection component is sleeved on the outside of the transmission member. The prosthesis delivery device according to claim 2, wherein: the overload protection assembly comprises a support member, a passive member and an active member, the passive member is configured to be circumferentially stationary relative to the transmission member and can move axially relative to the transmission member; the active member is configured to be axially stationary relative to the transmission member and can rotate circumferentially relative to the transmission member; the support member is used to keep the passive member and the active member in axial contact; The passive component includes a first abutting surface, and the active component includes a second abutting surface. The first abutting surface and the second abutting surface are arranged correspondingly. The first abutting surface and the second abutting surface are planes at least in the abutting position, and the planes are not parallel to the axis of the driving handle. The prosthesis delivery device according to claim 3, wherein the first abutment surface and the second abutment surface are both planes perpendicular to the axis of the driving handle. The prosthesis delivery device according to claim 3, wherein: the first abutment surface includes a first vertical surface, a first horizontal surface and a first inclined surface connected in sequence; the second abutment surface includes a second vertical surface, a second horizontal surface and a second inclined surface connected in sequence; the first vertical surface and the second vertical surface are both planes parallel to the axis of the driving handle, the first horizontal surface and the second horizontal surface are both planes perpendicular to the axis of the driving handle, and the first inclined surface and the second inclined surface are both planes arranged at an angle to the axis of the driving handle, and the angles are the same. The prosthesis delivery device according to claim 3, wherein: the first abutting surface includes a third inclined surface and a fifth inclined surface connected to the third inclined surface, and the third inclined surface and the fifth inclined surface are set at an obtuse angle; the second abutting surface includes a fourth inclined surface and a sixth inclined surface connected to the fourth inclined surface, and the fourth inclined surface and the sixth inclined surface are set at an obtuse angle; the third inclined surface and the fourth inclined surface are both planes arranged at an angle to the axis of the driving handle, the arrangement angle of the third inclined surface is the same as the arrangement angle of the fourth inclined surface, and the fifth inclined surface and the sixth inclined surface are both planes arranged at an angle to the axis of the driving handle The planes are arranged at an angle, and the arrangement angle of the fifth inclined surface is the same as the arrangement angle of the sixth inclined surface. The prosthesis delivery device according to claim 2, wherein: the overload protection assembly comprises a support member, a passive member and an active member, the passive member is configured to be circumferentially stationary relative to the transmission member and can move axially relative to the transmission member; the active member is configured to be axially stationary relative to the transmission member and can rotate circumferentially relative to the transmission member; the support member is used to keep the passive member and the active member in axial contact; The passive component includes a first abutting surface, and the active component includes a second abutting surface. The first abutting surface and the second abutting surface are arranged correspondingly. At least one of the first abutting surface and the second abutting surface is a curved surface at the abutting position, and the first abutting surface and the second abutting surface are circumscribed at the abutting position, and the circumscribed surface is not parallel to the axis of the driving handle. The prosthesis delivery device according to claim 3 or 7, wherein the first abutment surface and the second abutment surface are both sandblasted to increase surface roughness. The prosthesis delivery device according to claim 3 or 7, wherein: the passive member comprises a first body and a first abutment portion, the first body is located at the distal end of the first abutment portion, and the first abutment surface is disposed at the proximal end surface of the first abutment portion; The active member includes a second body and a second abutting portion, the second body is located at the proximal end of the second abutting portion, and the second abutting surface is arranged on the distal end surface of the second abutting portion. The prosthesis delivery device according to claim 9, wherein: the radial dimension of the first abutment portion is greater than the radial dimension of the first body, and a first blocking shoulder is formed at the connection between the first abutment portion and the first body, and the first blocking shoulder is used to abut the support member. The prosthesis delivery device according to claim 10, wherein: the overload protection component also includes a accommodating seat, the accommodating seat is fixedly sleeved on the outside of the transmission member, and the support member, the active member and the passive member are coaxially sleeved on the outer surface of the accommodating seat; the accommodating seat includes a distal part, a middle part and a proximal part; the radial dimension of the distal part is larger than the radial dimension of the middle part, forming a distal shoulder, the radial dimension of the middle part is larger than the radial dimension of the proximal part, forming a proximal shoulder, the distal shoulder is used to support the support member, and the proximal shoulder is used to abut the passive member to limit and prevent the passive member from moving too much toward the distal part. The prosthesis delivery device according to claim 11, wherein the support member is a compression spring, one end of the compression spring abuts against the distal shoulder, and the other end of the compression spring abuts against the first blocking shoulder. The prosthesis delivery device according to claim 11, wherein: a first stop groove is provided on the first body of the passive component, and a first stop pin is provided on the outer surface of the proximal part, and the first stop pin can be axially movably accommodated in the first stop groove. The prosthesis delivery device according to claim 11, wherein: the overload protection assembly further comprises a transmission housing, the transmission housing is coaxially sleeved on the outside of the active member to receive external torque and transmit it to the active member, The active member is configured to remain circumferentially stationary relative to the transmission housing. The prosthesis delivery device according to claim 14, wherein: a second anti-rotation groove is provided on the second body of the active member, a second anti-rotation pin is provided on the inner wall of the transmission housing, and the second anti-rotation pin can be axially movably accommodated in the second anti-rotation groove. The prosthesis delivery device according to claim 11, wherein: the overload protection assembly also includes a accommodating cover, the distal end of the accommodating cover has an axially extending coupling portion, the proximal end of the accommodating cover has a circumferentially extending blocking portion, the coupling portion is coupled to the proximal end of the accommodating seat to removably fix the accommodating cover to the accommodating seat, and the blocking portion is used to keep the active member axially stationary relative to the transmission member. The prosthesis delivery device according to claim 2, wherein: the handle shell includes an inner cavity, the proximal end of the handle shell is provided with an opening, the distal end of the transmission member enters the inner cavity of the handle shell through the opening, and the transmission member is configured to only rotate relative to the handle shell. The prosthesis delivery device of claim 17, wherein: The transmission member has a limiting protrusion located at the distal end and a limiting ridge located near the limiting protrusion, the limiting protrusion is circumferentially arranged on the transmission member and disposed inside the handle housing, the limiting ridge is circumferentially arranged on the transmission member and disposed outside the handle housing, and an open groove is formed between the limiting protrusion and the limiting ridge; The opening is contracted to form an opening shoulder, and the opening shoulder is accommodated in the opening groove. The prosthesis delivery device according to claim 18, wherein the radial dimension of the limiting ridge is greater than the radial dimension of the limiting protrusion. A prosthesis system comprises the prosthesis delivery device according to any one of claims 1 to 19 and a prosthesis.