A connecting mechanism and a stent delivery device

Abstract

The application discloses a connecting mechanism and a stent conveying device, which comprises a constraint member, a first connecting member arranged in the constraint member, a first insertion part and a second insertion part at the distal end of the first connecting member, a second connecting member comprising a second connecting member body and an insertion cooperation part, a first socket and a second socket arranged on the insertion cooperation part, when the first connecting member and the second connecting member are connected, the first insertion part moves to the proximal end or the distal end and is inserted into the first socket, the second insertion part moves along the depth direction of the second socket and is inserted into the second socket, the position of the first connecting member moving to the distal end or moving to the proximal end is limited, then the constraint member moves to the connection position of the first connecting member and the second connecting member, and the first connecting member and the second connecting member are radially constrained. The application realizes the stability of the connection between the insertion cooperation part and the constraint member when the stent is conveyed through the double locking mode, and can ensure that the stent can be accurately conveyed to the target position.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a connecting mechanism and a support delivery device. Background Technology

[0002] In the field of implantable interventional therapy, implants (such as heart valve stents, vascular stents, etc.) need to be precisely delivered to the target area in the body through a stent delivery device, and then the two are reliably separated. The stability of the connection and release directly determines the success or failure of the operation and the safety of the patient.

[0003] Taking heart valve delivery and replacement devices as an example, these devices are used to deliver prosthetic heart valves to the target location, replacing diseased heart valves and restoring heart function. Existing heart valve delivery and replacement devices mainly consist of a stent delivery device and a heart valve prosthesis. Whether the heart valve prosthesis can be accurately placed in the target area depends on the connection and release mechanism of the stent delivery device and the heart valve prosthesis.

[0004] The current support conveying device is mainly achieved by connecting a first connector, a constraint member, and a second connector. Specifically, the constraint member has a through hole on its far side wall, and the second connector has an insertion fitting part with a through hole. The insertion fitting part is inserted into the far end of the second connector so that the through hole of the constraint member is aligned with the through hole of the insertion fitting part. Then, the first connector is inserted through the two through holes to achieve the connection between the constraint member and the second connector.

[0005] During the release of the heart valve prosthesis, the restraint remains fixed, the first connector is pulled back, and the connection between the restraint and the insertion mating part is removed. Finally, the restraint is withdrawn, completing the separation of the delivery device restraint from the heart valve stent.

[0006] However, the insertion fitting part and the constraint part are only connected by the first connector. During the delivery of the heart valve prosthesis, if the first connector is displaced relative to the constraint part under the action of external force (e.g., operator error or compression by tortuous blood vessels), the first connector is prone to loosening or even being pulled apart, affecting the connection between the insertion fitting part and the constraint part, causing the second connector to be released prematurely, affecting the delivery and accurate placement of the heart valve prosthesis. Summary of the Invention

[0007] In view of this, the present invention provides a connecting mechanism and a stent delivery device to solve the problem that the current stent delivery device prematurely releases the second connector, which affects the accurate placement of the heart valve prosthesis.

[0008] In a first aspect, the present invention provides a connecting mechanism, comprising:

[0009] Constraints; A first connector is disposed within the constraint member, and the distal end of the first connector has a first insertion portion and at least one second insertion portion. The second connector includes a second connector body and a plug-in mating part connected between them; the plug-in mating part is provided with a first socket and a second socket that are connected between them. When connecting the first connector and the second connector, the first insert part moves to the proximal end or the distal end and inserts into the first socket, and the second insert part moves along the depth direction of the second socket and inserts into the second socket. The movement position of the first connector to the distal end or the proximal end is restricted. Then the constraint member moves to the connection point of the first connector and the second connector to radially constrain the first connector and the second connector.

[0010] The beneficial effects of the above-mentioned connecting mechanism are as follows: The above technical solution, through a double-locking method, ensures a stable connection between the insert fitting and the constraint during the transport of the support, preventing loosening between the insert fitting and the constraint before the support is moved into position, thus ensuring accurate transport of the support to the target location. Firstly, the first insert of the first connector can be quickly inserted into the second connector, and the second insert can be quickly inserted into the second socket of the second connector, achieving rapid connection between the first and second connectors and ensuring a stable connection. When the first connector moves proximally relative to the second connector, it is limited in the proximal direction; conversely, when the first connector moves distally relative to the second connector, it is limited in the distal direction, thus preventing premature separation of the first and second connectors due to operator error. Secondly, the portion of the second connector that connects to the first connector is inserted into the constraint and radially constrained by the constraint, enhancing the stability of the connection between the second and first connectors.

[0011] In one alternative embodiment, after the second insert portion moves along the depth direction of the second socket and is inserted into the second socket, the second insert portion passes through the second socket, and the first connector moves relative to the second connector to misalign the second insert portion with the second socket, and the movement position of the first connector to the distal end or the proximal end is restricted.

[0012] In one optional embodiment, both the first and second insertion ports are positioning holes that penetrate the insertion mating part; when connecting the first and second connectors, the second insertion part passes through the first and second insertion ports and locks against the outer wall surface of the insertion mating part. The above technical solution has a simple structure, and only the first and second insertion ports need to be machined when processing the insertion mating part.

[0013] In one optional embodiment, both the first and second sockets are positioning grooves that do not penetrate the insertion mating part, and the insertion mating part is provided with a slide that communicates with the second socket; when connecting the first connector and the second connector, the second insertion part passes through the first and second sockets and locks with the wall of the slide.

[0014] The above technical solution avoids interference between the second insert and other components because the second insert can be accommodated in the slide when positioning and does not extend from the insert mating part. It also avoids contact with human tissues and blood vessels, thus reducing damage to human tissues and blood vessels.

[0015] In one optional embodiment, the first socket, the second socket, the first insertion part, and the second insertion part are inclined in the same direction, so that the second insertion part can be smoothly disengaged from the outer wall surface or slide wall surface of the insertion mating part when released, and the first insertion part can be smoothly disengaged from the first socket of the insertion mating part when released, ensuring that the second connector and the bracket can be released smoothly.

[0016] In one optional embodiment, the first socket and the second socket are arranged inclined downward from the proximal end to the distal end, and the first insertion part and the second insertion part are arranged inclined downward from the proximal end to the distal end. When the first connector moves proximally relative to the second connector, the first connector and the second connector are locked together. After the first connector and the second connector are unlocked, the first connector moves distally relative to the second connector. The distal surface of the first insert portion and the distal surface of the first socket gradually slide together until they are no longer in contact. The distal surface of the second insert portion and the distal surface of the second socket gradually slide together until they are no longer in contact.

[0017] In one optional embodiment, the first socket and the second socket are inclined downward from the distal end to the proximal end, and the first insertion part and the second insertion part are inclined downward from the distal end to the proximal end. When the first connector moves to the distal end relative to the second connector, the first connector and the second connector are locked together. After the first connector and the second connector are unlocked, the first connector moves to the proximal end relative to the second connector. The proximal end face of the first insert part and the proximal end face of the first socket gradually slide together until they are no longer in contact. The proximal end face of the second insert part and the proximal end face of the second socket gradually slide together until they are no longer in contact.

[0018] In one optional embodiment, the tilt angle of the first socket, the second socket, the first insertion part, and the second insertion part is 20° to 60°. Within this angle range, the reliability of the connection between the guide wire and the second connector can be ensured when they move synchronously, and the two can also be smoothly separated when the first connector moves relative to the second connector.

[0019] In one optional embodiment, the first insert portion is provided with a plurality of second insert portions at intervals; the insert mating portion is provided with a plurality of second sockets at intervals; the distance between two adjacent second insert portions is the same as the distance between two adjacent second sockets.

[0020] The above technical solution, with multiple second inserts and multiple second sockets, increases the number of connection points between the first and second connectors, thereby improving the reliability and stability of the connection. The equal spacing between the second inserts and the second sockets ensures a uniform distribution of locking force, avoiding excessive localized stress and improving the overall structural stability.

[0021] In one optional embodiment, the distal end of the first connector is provided with a plurality of first insert portions at intervals, and each first insert portion is provided with at least one second insert portion; the insert mating portion is provided with a plurality of first sockets at intervals, and each first socket is connected to at least one second socket; the distance between two adjacent first insert portions is the same as the distance between two adjacent first sockets.

[0022] The above technical solution, with multiple first insert parts cooperating with multiple first sockets and multiple second insert parts cooperating with multiple second sockets, increases the number of connection points between the first and second connectors, thereby improving the reliability and stability of the connection. The equal spacing between the first insert parts and the first sockets ensures a uniform distribution of locking force, avoiding excessive localized stress and improving the overall structural stability.

[0023] In one alternative embodiment, the lock includes a first connector body, a first insert portion disposed at the distal end of the first connector body; a recess is provided between the first connector body and the first insert portion, the recess being adapted to provide accommodating space for the proximal end of the insert mating portion.

[0024] In one optional embodiment, the proximal end face of the recess, the distal end face of the recess, the first socket, the second socket, the first insertion part, and the second insertion part are inclined in the same direction.

[0025] In the above technical solution, when the insert fitting part and the second insert part are separated, the first connector is pushed to the far end, and the near end surface of the inclined recess can reduce the obstruction effect on the insert fitting part and produce a shovel-like effect, so as to promote the separation of the second connector and the first connector.

[0026] In one alternative embodiment, the width of the second insert portion is greater than the width of the first insert portion, and the width of the second socket is greater than the width of the first socket.

[0027] After the first and second connectors are separated, when the first connector is retracted proximally, the second insert slides along the bottom wall of the first socket due to the presence of the second insertion part and the second insertion port. Furthermore, the width of the second insertion part is greater than the width of the first insertion part, thus providing a certain degree of obstruction and preventing the first insertion part from being re-inserted into the first socket. Therefore, the connecting mechanism prevents the distal end of the first connector from re-embedding into the first and second insertion ports, thus avoiding the problem of pulling during release that could affect the valve stent positioning.

[0028] In one alternative implementation, the length of the second socket is less than the length of the first socket.

[0029] The above technical solution has a narrower second insertion port, which limits the range between the second insertion part and the second insertion port, reduces the possibility of the second insertion part being re-embedded in the second insertion port, and avoids the problem of the distal end of the first connector being re-embedded in the second insertion port, which would cause pulling during release and affect the positioning of the valve stent.

[0030] In one alternative embodiment, the width of the second socket does not exceed 4 / 5 of the width of the mating part; And / or, the first connector is made of a biocompatible material; And / or, the restraints are made of biocompatible materials; And / or, the second connector is made of a biocompatible material; And / or, the maximum diameter of the first connector does not exceed 7Fr; And / or, the ratio of the inner diameter to the wall thickness of the constraint member is not less than 2:1; And / or, the surface of the second insertion portion of the first connector is smoothed.

[0031] In a second aspect, the present invention also provides a support conveying device, comprising: A delivery conduit adapted to radially constrain a stent; A connecting mechanism is disposed within a delivery conduit and is adapted to deliver and release the support.

[0032] The beneficial effects of the aforementioned support conveying device are the same as those of the aforementioned connecting mechanism, and will not be described in detail here. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the connection structure between the first connector, the constraint member, and the second connector. Figure 2 This is a schematic diagram of a connecting mechanism provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of a first structure of a first connecting member in a connecting mechanism provided by the present invention; Figure 4 This is a schematic diagram of a second structure of a first connecting member in a connecting mechanism provided by the present invention; Figure 5 A schematic diagram of a first structure of a fitting part in a connecting mechanism provided by the present invention; Figure 6 For the present invention Figure 5 Top view; Figure 7 A schematic diagram of the external structure of a connecting mechanism provided by the present invention; Figure 8 This is a schematic diagram of a connecting mechanism provided in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the connection between the first connecting member and the second connecting member in a connecting mechanism provided in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of a second structure of the insertion mating part in a connecting mechanism provided by the present invention; Figure 11 For the present invention Figure 10 Cross-sectional view; Figure 12 This is a schematic diagram of the structure of the second connecting member in a connecting mechanism provided by the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. First connector; 11. First connector body; 12. Second insertion part; 13. Recessed part; 14. First insertion part; 15. Connecting ring; 2. Constraints; 3. Second connector; 31. Second connector body; 32. Insertion mating part; 33. First socket; 34. Second socket; 35. Slide rail. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the field of implantable interventional therapy, implants (such as heart valve stents, vascular stents, etc.) need to be precisely delivered to the target area in the body through a stent delivery device, and then the two are reliably separated. The stability of the connection and release directly determines the success or failure of the operation and the safety of the patient.

[0038] Taking heart valve delivery and replacement devices as an example, these devices are used to deliver prosthetic heart valves to the target location, replacing diseased heart valves and restoring heart function. Existing heart valve delivery and replacement devices mainly consist of a stent delivery device and a heart valve prosthesis. Whether the heart valve prosthesis can be accurately placed in the target area depends on the connection and release mechanism of the stent delivery device and the heart valve prosthesis.

[0039] Combination Figure 1 As shown, the current support conveying device is mainly connected by a first connector 1, a constraint 2, and a second connector 3. Specifically, the constraint 2 has a through hole on its far side wall, and the second connector 3 is provided with an insertion fitting part 32 with a through hole. The insertion fitting part 32 is fitted into the far end of the second connector 3 so that the through hole of the constraint 2 is aligned with the through hole of the insertion fitting part 32. Then, the first connector 1 is inserted through the two through holes to achieve the connection between the constraint 2 and the second connector 3.

[0040] During the release of the heart valve prosthesis, the restraint 2 remains fixed, the first connector 1 is pulled back, thereby releasing the connection between the restraint 2 and the insertion mating part 32, and finally the restraint 2 is withdrawn, completing the separation of the delivery device restraint from the heart valve stent.

[0041] However, the insertion fitting part 32 and the constraint member 2 are only connected by the first connector 1. During the delivery of the heart valve prosthesis, if the first connector 1 is subjected to external force (e.g., operator error, pulling the first connector 1 alone; or compression by tortuous blood vessels) and the constraint member 2 is relatively displaced, or the constraint member 2 is deformed under the compression of tortuous blood vessels, the first connector 1 is prone to loosening or even being pulled apart (the connecting ring 15 at the distal end of the first connector 1 is pulled apart), affecting the connection between the insertion fitting part 32 and the constraint member 2, causing the second connector 3 to be released prematurely, affecting the delivery and accurate placement of the heart valve prosthesis.

[0042] Based on this, the present invention provides a connection mechanism that achieves stable connection between the insert fitting part and the constraint part during the transport of the bracket through a double locking method, thereby avoiding the problem of premature separation between the insert fitting part and the constraint part before the bracket is moved into place.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "distal" generally refers to the end of the medical implant furthest from the operator; "proximal," the opposite of "distal," refers to the end of the medical implant closer to the operator; the term "radial" refers to a direction perpendicular to the axis of the medical implant; the term "length" refers to a direction along the axis of the medical implant; and the term "width" refers to a direction perpendicular to the length in a horizontal plane. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The following is combined with Figures 2 to 12 The specific embodiments of the present invention will be described in detail with reference to the connecting mechanism of the first aspect of the present invention and the support conveying device of the second aspect of the present invention.

[0045] Example 1 According to an embodiment of the present invention, in a first aspect, a connecting mechanism is provided, combining... Figures 2 to 7 As shown, it includes a constraint member 2, a first connector 1, and a second connector 3.

[0046] The constraint member 2 can be a tubular structure. The first connector 1 is disposed within the constraint member 2. The distal end of the first connector 1 has a first insert portion 14 and at least one second insert portion 12. The width of the second insert portion 12 is greater than the width of the first insert portion 14, so that the second insert portion 12 protrudes from the side of the first insert portion 14.

[0047] The second connector 3 includes a second connector body 31 and an insertion mating part 32 connected between them. The second connector body 31 is adapted to be connected to a bracket. The insertion mating part 32 is a protrusion structure provided on the second connector body 31. At least one insertion mating part 32 is provided, and a first socket 33 and a second socket 34 communicating with each other are provided on the insertion mating part 32. At least one second socket 34 is provided, and the width of the second socket 34 is greater than the width of the first socket 33. The first insertion part 14 is inserted into the first socket 33, and the second insertion part 12 is inserted into the second socket 34.

[0048] When connecting the first connector 1 and the second connector 3, the first insert part 14 is inserted into the first socket 33 and moves along the length direction of the first socket 33. The second insert part 12 moves along the depth direction of the second socket 34, so that the second insert part 12 is inserted into the second socket 34, realizing the insertion and mating of the first connector 1 and the second connector 3. Then, the constraint member 2 moves to the connection point of the first connector 1 and the second connector 3 to provide radial constraint on the first connector 1 and the second connector 3.

[0049] The insertion and engagement of the first connector 1 and the second connector 3 includes the following two scenarios: In the first scenario, the first insert part 14 moves proximally along the first socket 33. After the second insert part 12 is inserted into the second socket 34, the first connector 1 is limited when it moves proximally again. The first connector 1 can only disengage from the second connector 3 when it moves distally. Therefore, even if the operator accidentally pulls the first connector 1 proximally, it will not cause premature separation of the first connector 1 and the second connector 3. In the second scenario, the first insert part 14 moves distally along the first socket 33. After the second insert part 12 is inserted into the second socket 34, the first connector 1 is limited when it moves distally again. The first connector 1 can only disengage from the second connector 3 when it moves proximally. Therefore, even if the operator accidentally pushes the first connector 1 distally, it will not cause premature separation of the first connector 1 and the second connector 3.

[0050] During the support transport, the second connecting member 3 connects to the first connecting member 1, and the portion of the second connecting member 3 connected to the first connecting member 1 is inserted into the constraint member 2 and radially constrained by the constraint member 2. When the constraint member 2 moves towards the distal end, it can push the second connecting member 3 and the first connecting member 1 to move synchronously towards the distal end, jointly transporting the second connecting member 3 and ensuring stable support transport. When the first connecting member 1 and the second connecting member 3 move synchronously, they are positioned and connected, ensuring the stability of the second connecting member 3 and the support transport, and ensuring that the second connecting member 3 and the support can be smoothly and accurately delivered to the target area.

[0051] When separating the first connector 1 and the second connector 3, the constraint 2 retracts and disengages from the connection area between the insert fitting part 32 and the distal end of the first connector 1. The insert fitting part 32 and the distal end of the first connector 1 lose the radial constraint of the constraint 2. The first connector 1 moves in the opposite direction relative to the second connector 3 in the length direction. The first insert part 14 disengages from the first socket 33, and the second insert part 12 disengages from the second socket 34. The first connector 1 and the second connector 3 are disconnected.

[0052] The aforementioned connecting mechanism, through a double locking method, ensures a stable connection between the insert fitting 32 and the constraint member 2 during the transport of the bracket, preventing the insert fitting 32 and the constraint member 2 from becoming loose before the bracket is moved into position, thereby ensuring that the bracket can be accurately transported to the target position. Firstly, the first insert part 14 of the first connector 1 can be quickly inserted into the second connector 3, and the second insert part 12 can be quickly inserted into the second socket 34 of the second connector 3, achieving a rapid connection between the first connector 1 and the second connector 3 and ensuring the stability of the connection. When the first connector 1 moves proximally relative to the second connector 3, the first connector 1 is limited in the proximal direction; or when the first connector 1 moves distally relative to the second connector 3, the first connector 1 is limited in the distal direction. Therefore, it prevents premature separation of the first connector 1 and the second connector 3 due to operator error. Secondly, the portion of the second connector 3 that connects to the first connector 1 is inserted into the constraint member 2 and radially constrained by the constraint member 2, thereby enhancing the stability of the connection between the second connector 3 and the first connector 1.

[0053] It should be noted that the above-mentioned connecting mechanism is not only applicable to heart valve delivery and replacement devices, but also to other medical devices requiring precise connection and separation, demonstrating its wide applicability. When the above-mentioned connecting mechanism is applied in the field of medical devices, the first connector can be a guide wire or locking wire, and the second connector can be a positioning rod; when the above-mentioned connecting mechanism is applied in other fields, the first connector 1 and the second connector 3 are adapted to the specific application scenario in terms of their shape and structure.

[0054] In some embodiments, the first socket 33 and the second socket 34 are inclined downwards from the proximal end to the distal end, and the first insertion part 14 and the second insertion part 12 are inclined downwards from the proximal end to the distal end. After the first connector 1 and the second connector 3 are positioned, when the first connector 1 moves proximally relative to the second connector 3, the first connector 1 is limited. After the first connector 1 and the second connector 3 are positioned, the first connector 1 moves distally relative to the second connector 3, and the distal surface of the first insertion part 14 gradually slides against the distal surface of the first socket 33 until they disengage, and the distal surface of the second insertion part 12 gradually slides against the distal surface of the second socket 34 until they disengage.

[0055] As an alternative embodiment, the first socket 33 and the second socket 34 are inclined downwards from the distal end to the proximal end, and the first insertion part 14 and the second insertion part 12 are inclined downwards from the distal end to the proximal end. After the first connector 1 and the second connector 3 are positioned, when the first connector 1 moves distally relative to the second connector 3, the first connector 1 is limited; after the first connector 1 and the second connector 3 are positioned, the first connector 1 moves proximally relative to the second connector 3, and the proximal end face of the first insertion part 14 gradually slides with the proximal end face of the first socket 33 until they disengage, and the proximal end face of the second insertion part 12 gradually slides with the proximal end face of the second socket 34 until they disengage.

[0056] Example 2 According to an embodiment of the present invention, a connecting mechanism is provided, which combines... Figures 3 to 12 As shown, it includes a constraint member 2, a first connector 1, and a second connector 3.

[0057] The constraint member 2 can be a tubular structure. The first connector 1 is disposed within the constraint member 2. The distal end of the first connector 1 has a first insertion portion 14 and a second insertion portion 12. The second insertion portion 12 is disposed on the first insertion portion 14. The width of the second insertion portion 12 is greater than the width of the first insertion portion 14, so that the second insertion portion 12 protrudes from the side of the first insertion portion 14.

[0058] The second connector 3 includes a second connector body 31 and an insert fitting portion 32 connected to each other. The second connector body 31 is adapted to connect with a bracket. The insert fitting portion 32 is a protrusion structure provided on the second connector body 31. The insert fitting portion 32 is provided with at least one, and the insert fitting portion 32 is provided with a first socket 33 and a second socket 34 that communicate with each other. The width of the second socket 34 is greater than the width of the first socket 33. After the first insert portion 14 is inserted into the first socket 33, it can slide along the length direction of the first socket 33. The second insert portion 12 is a slider structure, and the second socket 34 is a slide rail structure. When the second insert portion 12 is inserted into the second socket 34, it can move along the depth direction of the second socket 34.

[0059] When connecting the first connector 1 and the second connector 3, combine Figure 2 As shown, the first insert part 14 is inserted into the first socket 33, and the second insert part 12 is inserted into and passes through the second socket 34; combined with Figure 8 and Figure 9As shown, after the first insert part 14 is inserted into the first socket 33 and the second insert part 12 is inserted and passes through the second socket 34, the first connector 1 moves forward relative to the second connector 3 in the length direction, so that the second insert part 12 and the second socket 34 are misaligned, thereby locking the first connector 1 and the second connector 3. Then, the constraint member 2 moves to the connection point of the first connector 1 and the second connector 3 to radially constrain the first connector 1 and the second connector 3. It should be noted that locking the first connector 1 and the second connector 3 means that when the first connector 1 moves proximally relative to the second connector 3, it is limited, and the operator's accidental pulling of the first connector 1 proximally will not cause the first connector 1 and the second connector 3 to separate prematurely; or when the first connector 1 moves distally relative to the second connector 3, it is limited, and the operator's accidental pushing of the first connector 1 distally will not cause the first connector 1 and the second connector 3 to separate prematurely.

[0060] During the support transport, the second connector 3 connects to the first connector 1, and the portion of the second connector 3 connected to the first connector 1 is inserted into the constraint member 2 and radially constrained by the constraint member 2. When the constraint member 2 moves towards the distal end, it can push the second connector 3 and the first connector 1 to move synchronously towards the distal end, jointly transporting the second connector 3 and ensuring stable support transport. When the first connector 1 and the second connector 3 move synchronously, they are positioned and connected, ensuring the stability of the second connector 3 and support transport, and ensuring that the second connector 3 and support can be smoothly and accurately delivered to the target area.

[0061] When separating the first connector 1 from the second connector 3, the constraint member 2 retracts and disengages from the connection area between the insert fitting 32 and the distal end of the first connector 1. The insert fitting 32 and the distal end of the first connector 1 lose the radial constraint of the constraint member 2. The first connector 1 moves in the opposite direction relative to the second connector 3 in the length direction, so that the second insert part 12 moves to a position corresponding to the second socket 34, and the first connector 1 and the second connector 3 are unlocked. The first connector 1 continues to move relative to the second connector 3, the first insert part 14 disengages from the first socket 33, and the second insert part 12 disengages from both the second socket 34 and the first socket 33. It should be noted that unlocking the first connector 1 from the second connector 3 means that the first connector 1 is no longer limited when moving relative to the second connector 3, that is, the first connector 1 can move towards the proximal end or towards the distal end relative to the second connector 3.

[0062] The aforementioned connecting mechanism, through a double locking method, ensures a stable connection between the insert fitting 32 and the constraint member 2 during the transport of the bracket, preventing the insert fitting 32 and the constraint member 2 from becoming loose before the bracket is moved into position, thus ensuring that the bracket can be accurately transported to the target position. Firstly, the first insert part 14 of the first connector 1 can be quickly inserted into the second connector 3, and the second insert part 12 can be quickly inserted into the second socket 34 of the second connector 3. When the first connector 1 moves relative to the second connector 3, the second insert part 12 and the second socket 34 are misaligned, achieving a rapid connection between the first connector 1 and the second connector 3 and ensuring a stable connection. When the first connector 1 moves proximally relative to the second connector 3, the first connector 1 is limited in the proximal direction; or when the first connector 1 moves distally relative to the second connector 3, the first connector 1 is limited in the distal direction. Therefore, it prevents premature separation of the first connector 1 and the second connector 3 due to operator error. Secondly, the portion of the second connector 3 that connects to the first connector 1 is inserted into the constraint member 2 and radially constrained by the constraint member 2, thereby enhancing the stability of the connection between the second connector 3 and the first connector 1.

[0063] The aforementioned connecting mechanism simplifies the operation steps of connecting the first connecting part 1 and the second connecting part 3, reduces the assembly difficulty of the first connecting part 1 and the second connecting part 3, improves the assembly efficiency of the first connecting part 1 and the second connecting part 3, and reduces the skill requirements for operators.

[0064] By retracting the constraint member 2, the connection area between the first connector 1 and the second connector 3 loses its radial constraint, allowing the second insertion part 12 to easily move to the position corresponding to the second insertion port 34, achieving rapid unlocking and separation. This makes the entire separation process between the first connector 1 and the second connector 3 equally simple and quick. When releasing the stent, the unlocking process between the first connector 1 and the second connector 3 is simple and reliable, ensuring that the stent can smoothly detach from the constraint member and avoiding surgical risks caused by inability to detach.

[0065] Since the connection method between the first connector 1 and the second connector 3 does not require the first connector to pass through the through hole on the constraint member, the risk of the constraint member rotating relative to the second connector 3 during transportation is avoided, thereby reducing the possibility of the first connector 1 getting tangled. Furthermore, in this embodiment, the constraint member 2 and the first connector 1 are transported independently, and the part where the first connector 1 and the second connector 3 are snapped together is located inside the constraint member 2. Therefore, even if the constraint member 2 rotates relative to the second connector 3 during the support transportation process, the problem of the first connector 1 getting tangled in the constraint member 2 will not occur.

[0066] Crucially, after the separation of the first connector 1 and the second connector 3, when the first connector 1 is retracted proximally, the second insert 12 (slider) and the second insertion port 34 (slide rail) allow the second insert 12 to slide along the bottom wall of the first insertion port 33. Furthermore, the width of the second insert 12 is greater than the width of the first insert 14, thus providing a certain degree of obstruction and preventing the first insert 14 from being re-inserted into the first insertion port 33. When the second insert 12 moves to the position corresponding to the second insertion port 34, the retraction of the first connector 1 proximally does not cause the second insert 12 to move upwards, preventing it from re-embedding into the second insertion port 34. Therefore, the aforementioned connection mechanism prevents the distal end of the first connector 1 from re-embedding into the first insertion port 33 and the second insertion port 34, thus avoiding the problem of pull during release that could affect the valve stent positioning.

[0067] Combination Figure 6 As shown, the length of the second insertion port 34 is less than the length of the first insertion port 33. The narrower length of the second insertion port 34 limits the range between the second insertion part 12 and the second insertion port 34, reducing the possibility of the second insertion part 12 being re-inserted into the second insertion port 34. This can prevent the distal end of the first connector 1 from being re-inserted into the second insertion port 34, thus avoiding affecting the valve stent positioning due to pulling during release.

[0068] It should be noted that the above-mentioned connection mechanism is not only applicable to heart valve delivery and replacement devices, but can also be applied to other medical devices that require precise connection and separation. It has wide applicability and can be adapted to different connection requirements.

[0069] In some embodiments, the first socket 33 is a parallelogram socket, or other shapes, such as triangles, polygons, etc. Figure 5 and Figure 6 As shown, both the first insertion port 33 and the second insertion port 34 are positioning holes that penetrate the insertion mating part 32. When connecting the first connector 1 and the second connector 3, the second insertion part 12 passes through the second insertion port 34 and locks against the outer wall surface of the insertion mating part 32. It should be noted that locking here means that the second insertion part 12 is limited when moving towards the proximal or distal end. The structure of this embodiment is simple, and only the first insertion port 33 and the second insertion port 34 need to be machined when processing the insertion mating part 32.

[0070] As an alternative embodiment, combined with Figure 10 and Figure 11As shown, both the first insertion port 33 and the second insertion port 34 are positioning grooves that do not penetrate the insertion mating part 32. The insertion mating part 32 is provided with a slide 35 that communicates with the second insertion port 34. When connecting the first connector 1 and the second connector 3, the second insertion part 12 passes through the first insertion port 33 and the second insertion port 34 and locks with the wall of the slide 35. In this embodiment, because the second insertion part 12 can be accommodated in the slide 35 during positioning and does not protrude from the insertion mating part 32, interference between the second insertion part 12 and other components can be avoided, and it will not come into contact with human tissue and blood vessels, reducing damage to human tissue and blood vessels.

[0071] Current stent delivery devices present challenges in releasing valvular stents when they travel through tortuous blood vessels to reach the target area.

[0072] To ensure successful deployment of the valve stent, in some embodiments, combined with Figures 3 to 5 As shown, the first socket 33, the second socket 34, the first insertion part 14 and the second insertion part 12 are inclined in the same direction, so that the second insertion part 12 can be smoothly disengaged from the outer wall surface of the insertion mating part 32 or the wall surface of the slide 35 when released, and the first insertion part 14 can be smoothly disengaged from the first socket 33 of the insertion mating part 32 when released, ensuring that the second connector 3 and the bracket can be released smoothly.

[0073] In one specific embodiment, the first socket 33 and the second socket 34 are inclined downwards from the proximal end to the distal end, and the first insertion part 14 and the second insertion part 12 are also inclined downwards from the proximal end to the distal end. When the first connector 1 moves proximally relative to the second connector 3, the first connector 1 and the second connector 3 are locked together. After the first connector 1 and the second connector 3 are unlocked, the first connector 1 moves distally relative to the second connector 3, and the distal surface of the first insertion part 14 gradually slides against the distal surface of the first socket 33 until they disengage. Similarly, the distal surface of the second insertion part 12 gradually slides against the distal surface of the second socket 34 until they disengage.

[0074] In this embodiment, firstly, since both the first socket 33 and the first insert portion 14 are inclined downwards from the proximal end to the distal end, during the unlocking process, as the first connector 1 moves distally relative to the second connector 3, the distal surface of the first insert portion 14 gradually presses against the distal surface of the first socket 33, and the first insert portion 14 moves distally along the first socket 33 until it completely disengages from contact. Similarly, since both the second socket 34 and the second insert portion 12 are inclined downwards from the proximal end to the distal end, during the unlocking process, as the first connector 1 moves distally relative to the second connector 3, the distal surface of the second insert portion 12 gradually presses against the distal surface of the second socket 34, and the second insert portion 12 moves distally along the second socket 34 until it completely disengages from contact. This gradual unlocking process ensures the smooth unlocking of the first insert portion 14 and the second insert portion 12, reduces the impact of sudden release, and ensures the stability of the unlocking process. Secondly, the inclined surface design makes the separation of the first connector and the second connector 3 simpler. The operator only needs to push the first connector 1 to the far end to separate the two, reducing the complexity of the operation.

[0075] As an alternative embodiment, the first socket 33 and the second socket 34 are inclined downwards from the distal end to the proximal end, and the first insertion part 14 and the second insertion part 12 are inclined downwards from the distal end to the proximal end. When the first connector 1 moves distally relative to the second connector 3, the first connector 1 and the second connector 3 are locked; after the first connector 1 and the second connector 3 are unlocked, the first connector 1 moves proximally relative to the second connector 3, and the proximal end face of the first insertion part 14 gradually slides against the proximal end face of the first socket 33 until they disengage, and the proximal end face of the second insertion part 12 gradually slides against the proximal end face of the second socket 34 until they disengage.

[0076] In this embodiment, firstly, since both the first socket 33 and the first insert portion 14 are inclined downwards from the distal end to the proximal end, during the unlocking process, as the first connector 1 moves towards the proximal end relative to the second connector 3, the proximal surface of the first insert portion 14 gradually presses against the proximal surface of the first socket 33, and the first insert portion 14 moves along the first socket 33 towards the proximal end until it completely disengages from contact. Similarly, since both the second socket 34 and the second insert portion 12 are inclined downwards from the distal end to the proximal end, during the unlocking process, as the first connector 1 moves towards the proximal end relative to the second connector 3, the proximal surface of the second insert portion 12 gradually presses against the proximal surface of the second socket 34, and the second insert portion 12 moves along the second socket 34 towards the proximal end until it completely disengages from contact. This gradual unlocking process ensures the smooth unlocking of the first insert portion 14 and the second insert portion 12, reduces the impact of sudden release, and ensures the stability of the unlocking process. Secondly, the inclined surface design makes the separation of the first connector and the second connector 3 simpler. The operator only needs to push the first connector 1 to the proximal end to separate the two, reducing the complexity of the operation.

[0077] The tilt angles of the first insertion port 33, the second insertion port 34, the first insertion part 14, and the second insertion part 12 are 20° to 60°. Within this angle range, the reliability of the connection between the guidewire and the second connector 3 when they move synchronously is ensured, and the two can also be smoothly separated when the first connector moves relative to the second connector 3. The tilt angles and shapes of the first insertion port 33, the second insertion port 34, the first insertion part 14, and the second insertion part 12 can be adjusted according to different surgical needs to adapt to different clinical situations. That is, the inclined surface can be a straight inclined surface, an arc inclined surface, or a combination of a straight inclined surface and an arc inclined surface.

[0078] As an alternative embodiment, the first socket 33, the second socket 34, the first insertion part 14, and the second insertion part 12 may also be arranged without tilting, combined with Figure 3 As shown, this method can also achieve the locking and separation of the second connector 3 and the first connector 1.

[0079] In some embodiments, a plurality of second insert portions 12 are spaced apart on the first insert portion 14. Preferably, 2-5 second insert portions 12 are spaced apart on the first insert portion 14. A plurality of second sockets 34 are spaced apart on the insert mating portion 32. The distance between two adjacent second insert portions 12 is the same as the distance between two adjacent second sockets 34. In this embodiment, the mating of the plurality of second insert portions 12 and the plurality of second sockets 34 increases the number of connection points between the first connector 1 and the second connector 3, improving the reliability and stability of the connection. The equal spacing between the second insert portions 12 and the second sockets 34 ensures a uniform distribution of locking force, avoids excessive local stress, and improves the stability of the overall structure.

[0080] In some embodiments, the distal end of the first connector 1 is provided with a plurality of first insert portions 14 spaced apart, and each first insert portion 14 is provided with at least one second insert portion 12; the insert mating portion 32 is provided with a plurality of first sockets 33 spaced apart, and each first socket 33 is connected to at least one second socket 34. The spacing between two adjacent first insert portions 14 is the same as the spacing between two adjacent first sockets 33. In this embodiment, the multiple first insert portions 14 and the multiple first sockets 33 mate, and the multiple second insert portions 12 and the multiple second sockets 34 mate, increasing the number of connection points between the first connector 1 and the second connector 3, thereby improving the reliability and stability of the connection. The equal spacing between the first insert portions 14 and the first sockets 33 ensures a uniform distribution of locking force, avoids excessive local stress, and improves the stability of the overall structure.

[0081] In some embodiments, the first connector 1 includes a first connector body 11, and a first insert portion 14 is disposed at the distal end of the first connector body 11. A recess 13 is provided between the first connector body 11 and the first insert portion 14. The recess 13 is adapted to provide accommodating space for the proximal end of the insert mating portion 32, avoiding interference between the proximal end of the insert mating portion 32 and the first connector body 11, and ensuring that their relative positions are not affected. The design of the recess 13 allows the proximal end of the second connector 3 to be more tightly embedded therein, increasing the contact area between the first connector and the second connector 3, thereby enhancing the stability of the connection and preventing the second connector 3 from falling off due to accidental operation.

[0082] The proximal and distal surfaces of the recessed portion 13, the first insertion port 33, the second insertion port 34, the first insertion portion 14, and the second insertion portion 12 are inclined in the same direction. In this embodiment, when the proximal and distal surfaces of the recessed portion 13, the first insertion port 33, the second insertion port 34, the first insertion portion 14, and the second insertion portion 12 are arranged inclined downwards from the proximal end to the distal end, when the insertion mating portion 32 separates from the second insertion portion 12, the first connector 1 is pushed distally. The proximal surface of the inclined recessed portion 13 can reduce the obstruction effect on the insertion mating portion 32 and produce a shovel-like effect, causing the second connector 3 to separate from the first connector 1. When the proximal end face of the recess 13, the distal end face of the recess 13, the first insertion port 33, the second insertion port 34, the first insertion part 14 and the second insertion part 12 are arranged inclined downward from the distal end to the proximal end, when the insertion mating part 32 and the second insertion part 12 are separated, the first connector 1 is pushed towards the proximal end. The distal end face of the inclined recess 13 can reduce the obstruction effect on the insertion mating part 32 and produce a shovel-like effect, causing the second connector 3 to separate from the first connector 1.

[0083] It should be noted that "inclined in the same direction" in this embodiment means that the first socket 33 is inclined upward from the distal end to the proximal end, and the proximal surface of the recess 13 is also inclined upward from the distal end to the proximal end. Here, the inclination angle between the proximal surface of the recess 13 and the first socket 33 can be the same or different.

[0084] In some embodiments, combined with Figure 6 As shown, the width of the second socket 34 does not exceed 4 / 5 of the width of the insertion mating part 32, so as to avoid the problem that the strength of the insertion mating part 32 is low due to the excessively large opening of the second socket 34. That is, this embodiment can both ensure the toughness and strength of the insertion mating part 32 and provide insertion space for the second insertion part 12.

[0085] In some embodiments, combined with Figure 12 As shown, there are three insert fitting parts 32 with an included angle of 120° between them. There are also three constraint members 2 and three first connecting members 1. This evenly distributed design allows each insert fitting part 32 to provide a stable support point, ensuring the balance and stability of the second connecting member 3 during the conveying and releasing process.

[0086] In some embodiments, the first connector 1 is made of a highly biocompatible material; more specifically, the body of the first connector is a cylindrical nickel-titanium wire. Nickel-titanium wire is a highly biocompatible material that can significantly reduce the body's immune response to the implant, lower the risk of inflammation and rejection, and reduce damage to human tissues. The maximum cross-sectional dimension of the first insertion portion 14 at the distal end of the first connector 1 does not exceed the diameter of the cylindrical nickel-titanium wire.

[0087] In some embodiments, the maximum diameter of the first connector 1 does not exceed 7 Fr, enabling the first connector 1 to adapt to smaller blood vessels and be suitable for stent delivery in various types of blood vessels. The smaller diameter of the first connector 1 reduces friction and damage to the blood vessel wall.

[0088] In some embodiments, the restraint 2 is made of a biocompatible material. More specifically, the restraint 2 is a circular, porous polymer tube with good biocompatibility and high flexibility, which allows the restraint 2 to adapt to complex vascular pathways.

[0089] In some embodiments, the ratio of the inner diameter to the wall thickness of the constraint member 2 is not less than 2:1, which makes the inner cavity of the constraint member 2 larger and the wall of the constraint member 2 thinner, thereby enabling the constraint member 2 to accommodate a larger outer diameter of the first connector and improving flexibility.

[0090] In some embodiments, the surface of the second insertion portion 12 of the first connector 1 is smoothed to reduce damage to human tissues and blood vessels.

[0091] The aforementioned connecting mechanism has a first connector 1 with a parallelogram barb structure at its distal end (the structure formed by the first insert part 14 and the recessed part 13). At the same time, there is a second insert part 12 protruding from the two sides of the barb at the front and rear edges of the barb structure (which can be a parallelogram protruding slider or various limiting structures). The valve stent second connector has a first insertion port 33 at its proximal end. The first insertion port 33 is a parallelogram positioning hole or groove. A second insertion port 34 is provided on the first insertion port 33 (which can be a smooth slide rail or a design that cooperates with various limiting structures). The second insertion port 34 cooperates with the second insert part 12.

[0092] Taking the proximal end face of the recessed portion 13, the distal end face of the recessed portion 13, the first insertion port 33, the second insertion port 34, the first insertion portion 14 and the second insertion portion 12 as an example of being arranged inclined downward from the proximal end to the distal end, the usage process of the connection mechanism of the present invention will be described.

[0093] When the valve stent is connected to the connecting mechanism, the first connector 1 is within the constraint 2, with the distal end of the first connector 1 extending beyond the distal end of the constraint 2. The first insertion part 14 at the distal end of the first connector 1 is inserted into the first insertion port 33, and the second insertion part 12 at the distal end of the first connector 1 is inserted into the second insertion port 34. Then, the first connector 1 is slid proximally, pulling the second connector 3 into the constraint 2. Finally, the distal end of the constraint 2 is tightly fitted with the insertion mating part 32. With the constraint of the inner cavity of the constraint 2, the first connector 1 and the insertion mating part 32 are tightly connected, completing the loading. The other two second connectors 3 are connected in the same way, completing the connection between the valve stent and the connecting mechanism.

[0094] When the second connector 3 and the valve stent are released, the stent delivery device, carrying the valve stent, travels through the tortuous blood vessels to reach the target area. After the second connector 3 is positioned (i.e., the second connector 3 is fixed to the position of the blood vessel), when the valve stent is released, the restraint 2 is retracted proximally, causing the restraint 2 to disengage from the connection area between the first connector 1 and the second connector 3, exposing the connection point between the distal end of the first connector 1 and the second connector 3. The first connector 1 is pushed distally until the second insertion part 12 at the distal end of the first connector 1 enters the second insertion port 34 of the second connector, so that the second insertion part 12 no longer locks the second connector 3. The first connector 1 is continued to be pushed distally, and the first insertion part 14 at the distal end of the first connector 1 separates from the first insertion port 33 of the second connector 3.

[0095] Example 3 According to an embodiment of the present invention, in a second aspect, a stent delivery device is provided, including a delivery conduit and a connecting mechanism. The connecting mechanism is disposed within the delivery conduit and is adapted to deliver and release a valvular stent. The valvular stent is a self-expanding stent, and the delivery conduit is adapted to radially constrain the valvular stent. The delivery conduit is used to deliver the valvular stent and the connecting mechanism. After the delivery conduit moves the stent and the connecting mechanism to the vicinity of a target position, the valvular stent is delivered through the connecting mechanism, causing the valvular stent to extend from the delivery conduit and move to the target area. Then, the delivery conduit is retracted proximally, moving the delivery conduit a certain distance proximally so that the valvular stent is fully exposed from the delivery conduit, and the valvular stent self-expands and is fixed at the target position. Then, the connecting mechanism is operated to disengage the connecting mechanism from the second connecting member 3 on the valvular stent, thereby releasing the valvular stent. Finally, the delivery conduit and the connecting mechanism are retracted.

[0096] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A connecting mechanism, characterized in that, include: Constraint (2); A first connector (1) is disposed within the constraint member (2), and the distal end of the first connector (1) has a first insert portion (14) and at least one second insert portion (12). The second connector (3) includes a second connector body (31) and a plug-in mating part (32) connected between them; the plug-in mating part (32) is provided with a first socket (33) and a second socket (34) communicating between them. When connecting the first connector (1) and the second connector (3), the first insert (14) moves to the proximal end or the distal end and inserts into the first socket (33), and the second insert (12) moves along the depth direction of the second socket (34) and inserts into the second socket (34). The position of the first connector (1) moving to the distal end or the proximal end is restricted. Then the constraint member (2) moves to the connection point of the first connector (1) and the second connector (3) to radially constrain the first connector (1) and the second connector (3).

2. The connecting mechanism according to claim 1, characterized in that, After the second insert (12) moves along the depth direction of the second socket (34) and is inserted into the second socket (34), the second insert (12) passes through the second socket (34), and the first connector (1) moves relative to the second connector (3) so that the second insert (12) is misaligned with the second socket (34), and the first connector (1) is restricted from moving to the distal end or to the proximal end.

3. The connecting mechanism according to claim 2, characterized in that, The first socket (33) and the second socket (34) are both positioning holes that pass through the insertion fitting part (32); when the first connector (1) and the second connector (3) are connected, the second insertion part (12) passes through the second socket (34) and locks with the outer wall surface of the insertion fitting part (32).

4. The connecting mechanism according to claim 2, characterized in that, The first socket (33) and the second socket (34) are both positioning grooves that do not penetrate the insertion mating part (32). The insertion mating part (32) is provided with a slide (35) that communicates with the second socket (34). When the first connector (1) and the second connector (3) are connected, the second insertion part (12) passes through the second socket (34) and locks with the wall of the slide (35).

5. The connecting mechanism according to claim 1, characterized in that, The first socket (33), the second socket (34), the first insertion part (14), and the second insertion part (12) are inclined in the same direction.

6. The connecting mechanism according to claim 5, characterized in that, The first socket (33) and the second socket (34) are inclined downward from the proximal end to the distal end, and the first insertion part (14) and the second insertion part (12) are inclined downward from the proximal end to the distal end; When the first connector (1) moves proximally relative to the second connector (3), the first connector (1) and the second connector (3) are locked together. After the first connector (1) and the second connector (3) are unlocked, the first connector (1) moves distally relative to the second connector (3), and the distal surface of the first insert (14) and the distal surface of the first socket (33) gradually slide until they are no longer in contact. The distal surface of the second insert (12) and the distal surface of the second socket (34) gradually slide until they are no longer in contact.

7. The connecting mechanism according to claim 5, characterized in that, The first socket (33) and the second socket (34) are inclined downward from the distal end to the proximal end, and the first insertion part (14) and the second insertion part (12) are inclined downward from the distal end to the proximal end; When the first connector (1) moves to the distal end relative to the second connector (3), the first connector (1) and the second connector (3) are locked together. After the first connector (1) and the second connector (3) are unlocked, the first connector (1) moves to the proximal end relative to the second connector (3), and the proximal end face of the first insertion part (14) and the proximal end face of the first socket (33) gradually slide until they are no longer in contact. The proximal end face of the second insertion part (12) and the proximal end face of the second socket (34) gradually slide until they are no longer in contact.

8. The connecting mechanism according to claim 5, characterized in that, The tilt angles of the first socket (33), the second socket (34), the first insertion part (14), and the second insertion part (12) are 20° to 60°.

9. The connecting mechanism according to claim 1, characterized in that, The first insertion part (14) is provided with a plurality of second insertion parts (12) at intervals; the insertion mating part (32) is provided with a plurality of second sockets (34) at intervals; the distance between two adjacent second insertion parts (12) is the same as the distance between two adjacent second sockets (34).

10. The connecting mechanism according to any one of claims 1-9, characterized in that, The distal end of the first connector (1) is provided with a plurality of first insert portions (14) spaced apart, and each first insert portion (14) is provided with at least one second insert portion (12); the insert mating portion (32) is provided with a plurality of first sockets (33) spaced apart, and each first socket (33) is connected to at least one second socket (34); the distance between two adjacent first insert portions (14) is the same as the distance between two adjacent first sockets (33).

11. The connecting mechanism according to any one of claims 1-9, characterized in that, The first connector (1) includes a first connector body (11), and the first insert portion (14) is disposed at the far end of the first connector body (11); a recess (13) is provided between the first connector body (11) and the first insert portion (14), and the recess (13) is adapted to provide accommodating space for the proximal end of the insert mating portion (32).

12. The connecting mechanism according to claim 11, characterized in that, The proximal end face of the recess (13), the distal end face of the recess (13), the first socket (33), the second socket (34), the first insertion part (14), and the second insertion part (12) are inclined in the same direction.

13. The connecting mechanism according to any one of claims 1-9, characterized in that, The width of the second insertion part (12) is greater than the width of the first insertion part (14), and the width of the second socket (34) is greater than the width of the first socket (33).

14. The connecting mechanism according to any one of claims 1-9, characterized in that, The length of the second socket (34) is less than the length of the first socket (33).

15. The connecting mechanism according to any one of claims 1-9, characterized in that, The width of the second socket (34) does not exceed 4 / 5 of the width of the insertion mating part (32); And / or, the first connector (1) is made of a biocompatible material; And / or, the constraint (2) is made of a biocompatible material; And / or, the second connector (3) is made of a biocompatible material; And / or, the maximum diameter of the first connector (1) does not exceed 7 Fr; And / or, the ratio of the inner diameter to the wall thickness of the constraint member (2) is not less than 2:1; And / or, the surface of the second insertion portion (12) of the first connector (1) is smoothed.

16. A support conveying device, characterized in that, include: A delivery conduit adapted to radially constrain a stent; The connecting mechanism according to any one of claims 1-15, wherein the connecting mechanism is disposed within the delivery conduit, and the connecting mechanism is adapted to deliver and release the stent.

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