Conveyor rear release assembly and conveyor

Abstract

The invention provides a conveyor rear release assembly and a conveyor, the conveyor rear release assembly comprises a sheath core, a fixed part, a movable part and a rotating part, the sheath core simultaneously penetrates through cavities of the fixed part, the movable part and the rotating part and is fixedly connected with the movable part, and the sheath core is controlled by the movable part to slide in the axial direction; the near end of the fixed part is in axial sliding connection with the far end of the movable part through a connecting column with a non-circular section; the rotating piece is arranged on the fixed piece and the movable piece in a sleeving manner and can rotate in the circumferential direction relative to the fixed piece and the movable piece, so that the movable piece can be locked or slide in the axial direction relative to the fixed piece; when the rotating piece rotates to the position where the movable piece can slide in the axial direction, the movable piece can drive the sheath core to retreat by a larger stroke; furthermore, in the releasing process after operation, the connecting column with the non-circular section can prevent the sheath core from rotating during unlocking, and inaccurate positioning of the support caused by torsion of the support is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a post-release component and a delivery device of a delivery device. Background Art

[0002] Aortic diseases such as aortic aneurysm and aortic dissection are one of the most fatal and difficult-to-treat vascular surgery diseases. Traditional treatment methods involve surgical operations, which have the risks of large surgical trauma and high mortality. In recent years, a minimally invasive and simple interventional surgical method has been developed, in which a covered stent is implanted at the diseased blood vessel site. The covered stent adheres closely to the inner wall of the blood vessel, isolating the diseased part of the blood vessel from the blood flow. The covered stent can not only allow the blood to flow normally but also protect the diseased blood vessel and effectively repair the blood vessel lesion. Reconstructing the iliac artery requires using a delivery device to deliver the stent to the iliac artery site and release it. Currently, when the existing delivery device releases the stent, it is easy to cause the stent to stack or twist, which will have an adverse impact on the release accuracy of the stent and may even lead to the failure of the operation in severe cases.

[0003] Currently, a delivery device generally uses a post-release component to release the lumen stent. When the blood vessel model of a patient is relatively curved, the limited release stroke may cause the situation where the proximal end of the stent at the distal end of the sheath core cannot be released. Moreover, during the post-release operation, the sheath core rotates, resulting in the stent twisting, thereby making the stent positioning accuracy inaccurate. Summary of the Invention

[0004] Based on this, it is necessary to provide a new post-release component and a delivery device of a delivery device, which can provide a post-release stroke suitable for different specifications of stents and at least solve the problem that the sheath core is prone to rotate when the stent is released by retracting the sheath core.

[0005] A post-release component of a delivery device includes a sheath core, and a fixed member, a movable member, and a rotating member each having a cavity inside. The proximal end of the sheath core sequentially passes through the cavities of the fixed member, the rotating member, and the movable member and is fixedly connected to the movable member; a connecting column having a non-circular radial cross-section is provided on the proximal side of the fixed member, and the connecting column is axially slidably connected to the distal end of the movable member; the rotating member is sleeved on the fixed member and the movable member and at least covers a part of the outer surface on the proximal side of the fixed member and a part of the outer surface on the distal side of the movable member; the rotating member can rotate circumferentially relative to the fixed member and the movable member, so that the movable member can be axially locked or slid relative to the fixed member.

[0006] In one embodiment, a first surface chute is provided on the outer surface of the proximal side of the fixing member, a second surface chute is provided on the outer surface of the distal side of the movable member, bumps are provided on the inner side wall of the rotating member near both axial ends, the bumps are respectively arranged in the first surface chute and the second surface chute, and can respectively slide in the first surface chute and the second surface chute.

[0007] In one embodiment, both the first surface chute and the second surface chute include a long slot and a short slot that are continuously arranged in the circumferential direction, and the axial length of the long slot in one of the chutes is greater than the axial length of the short slot; the long slot of the first surface chute penetrates the proximal end face of the fixing member, and the long slot of the second surface chute penetrates the distal end face of the movable member.

[0008] In one embodiment, a raised first limiting block is provided at a position where the short slot is close to the long slot in the circumferential direction, and the raised height of the first limiting block is less than the slot depth of the corresponding short slot.

[0009] In one embodiment, the first surface chute includes a first short slot, the second surface chute includes a second short slot, the two bumps include a first bump at the distal end and a second bump at the proximal end. When the second bump slides into the second short slot, the first bump slides into the first short slot.

[0010] In one embodiment, the first surface chute includes a first long slot, the second surface chute includes a second long slot. When the second bump slides into the second long slot, the first bump slides into the first long slot or the first short slot.

[0011] In one embodiment, the second surface chute further includes at least an annular short slot spaced from the second short slot in the axial direction towards the proximal end; at least the proximal part of the connecting column is provided with a non-circular cross-section block, a connecting blind hole is opened at the distal end of the movable member, and a circular cross-section hole is provided at least at an axial position opposite to the annular short slot in the blind hole; when the second bump slides along the long slot into the annular short slot, the non-circular cross-section block slides into the circular cross-section hole.

[0012] In one embodiment, a non-circular cross-section hole is provided between the distal end opening of the connecting blind hole and the distal position of the annular short slot, the shape of the non-circular cross-section block is adapted to the shape of the non-circular cross-section hole, and the diameter of the circular cross-section hole is greater than the maximum radial dimension of the non-circular cross-section block.

[0013] In one embodiment, the connecting column between the proximal end of the fixing block and the non-circular cross-section block includes a connecting rod, and the maximum diameter of the connecting rod is less than or equal to the minimum radial dimension of the non-circular cross-section hole.

[0014] A conveyor includes a handle assembly, an outer sheath tube, and the conveyor post-release assembly as described above. The outer sheath tube is connected to the distal end of the handle assembly; the conveyor post-release assembly is fixedly connected to the proximal end of the handle assembly. After connection, the sheath core can movably pass through the outer sheath tube; an anchoring member is provided on the side wall of the distal end of the sheath core. When the movable member slides in the proximal direction, the anchoring member is driven by the sheath core to slide in the proximal direction to release the bracket.

[0015] The beneficial effects of the present invention are as follows: The present invention provides a conveyor post-release assembly and a conveyor. The conveyor post-release assembly includes a sheath core, a fixing member, a movable member, and a rotating member each having an internal cavity. The sheath core simultaneously passes through the cavities of the fixing member, the movable member, and the rotating member and is fixedly connected to the movable member; the proximal end of the fixing member is axially slidably connected to the distal end of the movable member through a connecting column with a non-circular cross-section; the rotating member is sleeved on the fixing member and the movable member and at least covers a part of the outer surface of the proximal end of the fixing member and a part of the outer surface of the distal end of the movable member; the rotating member can rotate circumferentially relative to the fixing member and the movable member, so that the movable member can be axially locked or slid relative to the fixing member; when the rotating member rotates to a position where the movable member can slide axially, the movable member can drive the sheath core to retract a greater distance; it is adapted to release brackets of different specifications. Further, during the operation of the post-release process, the connecting column with a non-circular cross-section can prevent the sheath core from rotating when unlocking, avoiding the bracket from twisting and causing inaccurate positioning of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the conveyor of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the conveyor post-release assembly of the present invention.

[0018] Figure 3 It is an internal cross-sectional schematic diagram of the conveyor post-release assembly of the present invention.

[0019] Figure 4 It is an exploded structural diagram of the conveyor post-release assembly of the present invention.

[0020] Figure 5 It is a schematic connection structure diagram of the fixing member and the movable member of the present invention.

[0021] Figure 6 It is a schematic structural diagram of the first limiting block in the fixing member in the first embodiment of the present invention.

[0022] Figure 7Schematic diagram of the first limiting block inside the fixing part in another embodiment of the present invention.

[0023] Figure 8 Schematic diagram of the second limiting block of the "T"-shaped first surface chute in the fifth embodiment of the present invention.

[0024] Figure 9 Schematic diagram of the second limiting block of the "T"-shaped first surface chute in another embodiment of the present invention.

[0025] Figure 10 Schematic diagram of the first limiting block inside the fixing part in the second embodiment of the present invention.

[0026] Figure 11 Schematic diagram of the second limiting block of the "L"-shaped first surface chute in the fifth embodiment of the present invention.

[0027] Figure 12 Schematic diagram of the third limiting block in the fourth embodiment of the present invention.

[0028] Figure 13 For the present invention Figure 12 Partial enlarged view of position A.

[0029] Figure 14 Schematic diagram of the fourth limiting block in the fourth embodiment of the present invention.

[0030] Figure 15 For the present invention Figure 14 Partial enlarged view of position B.

[0031] Figure 16 Schematic diagram of the moving part in the first embodiment of the present invention.

[0032] Figure 17 Schematic diagram of the surface chute structures of the fixing part and the moving part in the third embodiment of the present invention.

[0033] Figure 18 Schematic diagram of the rotating part in the third embodiment of the present invention.

[0034] Figure 19 Internal sectional view of the conveyor rear release assembly in the sixth embodiment of the present invention.

[0035] Figure 20 Schematic diagram of the moving part in the sixth embodiment of the present invention.

[0036] Figure 21 Schematic diagram of the annular short groove structure of the moving part in the sixth embodiment of the present invention.

[0037] Figure 22 Internal sectional view of the moving part in the sixth embodiment of the present invention.

[0038] Figure 23 This is a schematic structural view of the fixing member in the sixth embodiment of the present invention.

[0039] Figure 24 This is a schematic view of the fixing member with an external thread structure in the sixth embodiment of the present invention.

[0040] Figure 25 This is a schematic view of the movable member with an internal thread structure in the sixth embodiment of the present invention. Detailed implementation manners

[0041] To better understand the concept of the present application, the following specifically describes the implementation manners of the present application with reference to the accompanying drawings. The following specific embodiments are only partial embodiments of the present application and do not limit the present application.

[0042] For the sake of description, spatially relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper". Such spatially relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, then the element described as "below" or "beneath" another element or feature will be subsequently oriented as "above" or "upper" another element or feature. Therefore, the exemplary term "below" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0043] Although terms such as first, second, and third may be used in the text to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used in the text. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0044] To more clearly describe the structure of the present application, the terms "proximal end" and "distal end" are defined herein as conventional terms in the field of interventional medicine. Specifically, the "distal end" refers to the end away from the surgical operator, and the "proximal end" refers to the end close to the surgical operator; the "axial direction" refers to its length direction, and the "radial direction" refers to the direction perpendicular to the "axial direction".

[0045] Please refer to Figure 1 and Figure 2 For the conveyor 100 provided in this application, it is used to load a stent. The stent can be a lumen device, such as a lumen stent. Hereinafter, the lumen stent will be taken as an example for illustration. The stent includes a support skeleton and a film covering the support skeleton. The film is coated on the support skeleton to form a lumen structure. A bare wave ring is provided at the distal end of the support skeleton for hooking and positioning; Please refer to Figure 1 As shown in, the conveyor 100 includes a handle assembly 2, an outer sheath 3, and a post-release assembly 1 of the conveyor. The handle assembly 2 includes a fixed handle and a movable handle. The fixed handle is connected with a guide rod. The movable handle is sleeved on the guide rod and can slide axially relative to the guide rod, and is connected with the outer sheath 3 to control the axial sliding of the outer sheath 3. The outer sheath 3 is used to accommodate the stent in a compressed state. When the outer sheath 3 slides axially towards the proximal end, the stent disengages from the distal end of the outer sheath 3 and is released. The released stent self-expands and anchors on the blood vessel wall to achieve partial release. The outer sheath 3 penetrates into the inner cavity from the distal end of the handle assembly 2 and is connected with the movable handle. The post-release assembly 1 of the conveyor is fixedly connected with the proximal end of the guide rod located in the handle assembly 2. After connection, the sheath core 15 can movably penetrate into the outer sheath 3. An anchoring member for anchoring the stent is provided on the side wall of the sheath core 15 near the distal end. The anchoring member has a plurality of hook claw structures for hooking the stent, and a guiding head is connected to the distal end of the sheath core 15. The post-release assembly 1 of the conveyor is used to control the switching of the sheath core 15 between the locked state and the axially slidable unlocked state. When the post-release assembly 1 of the conveyor is in the unlocked state, the sheath core 15 can slide axially towards the proximal end relative to the outer sheath 3, so that the anchoring member slides axially for a certain distance, so that the part of the stent hooked on the anchoring member is released from the hooked state to achieve the complete release of the stent.

[0046] Embodiment 1

[0047] In this embodiment, please refer to Figures 2 - 4, the post-conveyor release assembly 1 includes a sheath core 15, and a fixing member 11, a movable member 13, and a rotating member 12 each having a cavity therein. The proximal end of the sheath core 15 sequentially passes through the cavities of the fixing member 11, the rotating member 12, and the movable member 13 and is fixedly connected to the movable member 13. The distal end extends into the outer sheath tube 3 and is used for loading a stent. The proximal end of the fixing member 11 is axially slidably connected to the distal end of the movable member 13 through a connecting column 140 having a non-circular cross-section. The purpose of setting the connecting column 140 with a non-circular cross-section is to enable the rotating member 12 to avoid driving the movable member 13 to rotate when unlocking. Further, when the movable member 13 can axially slide relative to the fixing member 11, it can be prevented from rotating. The rotating member 12 is sleeved on the fixing member 11 and the movable member 13, and at least covers a part of the outer surface of the proximal end of the fixing member 11 and a part of the outer surface of the distal end of the movable member 13. The rotating member 12 is sleeved on the fixing member 11 and the movable member 13 and is in close contact with the surfaces of the fixing member 11 and the movable member 13. The purpose of setting the rotating member 12 is to provide a releasable limiting structure between the fixing member 11 and the movable member 13. The rotating member 12 can rotate circumferentially relative to the fixing member 11 and the movable member 13. The rotating member 12 switches between the axially limiting state and the non-limiting state of the fixing member 11 and the movable member 13 by rotating circumferentially, so that the movable member 13 can axially slide relative to the fixing member 11 between the slidable state and the non-slidable state. Please further refer to Figure 5 , the limiting structure of the rotating member 12 for the fixing member 11 and the movable member 13 is realized by a surface chute 10 provided on the outer surface of the fixing member 11 near the proximal end and the outer surface of the movable member 13 near the distal end, and a protrusion 180 provided at both axial ends of the inner side wall of the cavity of the rotating member 12. The protrusion 180 can slide in the surface chute 10. The surface chute 10 includes a circumferentially distributed limiting portion and a limiting release portion. When the protrusion 180 slides to the limiting portion, the protrusion 180 has no axial sliding space in the surface chute 10, so the relative positions of the fixing member 11 and the movable member 13 are restricted, and the axial sliding of the movable member 13 is restricted. When the protrusion 180 slides to the limiting release portion, the protrusion 180 has an axial sliding space in the surface chute 10, so the movable member 13 can axially slide relative to the fixing member 11.

[0048] In this embodiment, please refer to Figure 5, the surface chute 10 includes a long groove 110 and a short groove 120 that are continuously arranged circumferentially. The axial length of the long groove 110 is greater than the axial length of the short groove 120. Among them, the axial length of the short groove 120 is the same as the axial length of the convex block 180, aiming to limit the axial sliding space of the convex block 180. The axial length of the long groove 110 is greater than the axial length of the convex block 180, aiming to release the locking relationship between the movable member 13 and the fixed member 11 when the convex block 180 rotates to the position of the long groove 110, so that the convex block 180 can slide out from the position of the long groove 110 to achieve the axial sliding of the movable member 13 relative to the fixed member 11; in one embodiment, at least the long groove 110 on the movable member 13 penetrates to its distal end face. The penetrating structure of the long groove 110 enables the movable member 13 to continue to slide backward after the convex block 180 slides out of the distal end face along the axial direction, thereby increasing the retraction distance of the sheath core 15 and increasing the release stroke of the post-release.

[0049] In a preferred embodiment, please refer to Figures 5 - 7 , the long groove 110 penetrates the proximal end face of the fixed member 11 and the distal end face of the movable member 13; the long groove 110 is provided on both the fixed member 11 and the movable member 13, enabling the convex blocks 180 at both ends of the rotating member 12 to slide out from the long groove 110 of the movable member 13, which can increase the retraction distance of the sheath core 15 and increase the release stroke of the post-release; the long groove 110 of the fixed member 11 facilitates the convex block 180 to enter the surface chute 10 from the position of the long groove 110 during the assembly of the rotating member 12.

[0050] In one embodiment, please refer to Figure 6 and Figure 7 , at the position where the short groove 120 is close to the long groove 110 circumferentially, a raised first limit block 130 is provided. The first limit block 130 is arranged between the short groove 120 and the long groove 110, and is used to play a role in restricting rotation when the convex block 180 rotates between the short groove 120 and the long groove 110 and slides from the short groove 120 to the long groove 110. The setting of the first limit block 130 can first prevent the convex block 180 from rotating randomly when not in use, causing damage to the unnecessary hooking structure. Secondly, it can provide a certain resistance during use to prompt the user to switch from the short groove 120 to the long groove 110 and release the axial restriction relationship; among them, the raised height of the first limit block 130 is less than the groove depth of the short groove 120, which can effectively provide circumferential rotation restriction without completely restricting it, ensuring that the convex block 180 can jump from the short groove 120 into the long groove 110 when the user increases the torque when necessary.

[0051] Further preferably, the corner position of the first limit block 130 adopts a smooth arc transition, which is beneficial to reducing a part of the resistance during the process of the convex block 180 jumping from the short groove 120 to the long groove 110.

[0052] In this embodiment, please refer to Figure 5 and Figure 14 . The fixing member 11 is provided with a first surface chute 111, and the movable member 13 is provided with a second surface chute 131. The first surface chute 111 includes a first long groove 1102, and the second surface chute 131 includes a second long groove 1302. The bump 180 includes a first bump 121 at the distal end and a second bump 122 at the proximal end. The projections of the first bump 121 and the second bump 122 on the radial section of the rotating member 12 and the connecting line of the axis form an angle of 0°, and are located at the same axis position. With such a setting, the first surface chute 111 and the second surface chute 131 are respectively arranged opposite to the first bump 121 and the second bump 122, and have the same axis position. The first bump 121 slides in the first surface chute 111, and the second bump 122 slides in the second surface chute 131. The first bump 121 and the second bump 122 rotate synchronously. When the first bump 121 slides into the first long groove 1102 and the second bump 122 slides into the second long groove 1302, both the first bump 121 and the second bump 122 can slide axially along the first long groove 1102 and the second long groove 1302 simultaneously.

[0053] Among them, please refer to Figure 5 . The first surface chute 111 further includes a first short groove 1101, and the second surface chute 131 further includes a second short groove 1301. When the second bump 122 slides into the second short groove 1301, in order to ensure that the movable member 13 is in a locked state where it cannot slide axially relative to the fixing member 11 at this time, it is necessary to satisfy that the first bump 121 slides into the first short groove 1101 at this time, and both bumps are located in the short groove 120, then the axial sliding is restricted, and the release structure is in a locked state to avoid sliding.

[0054] In this embodiment, please refer to Figure 3 and Figure 4, the post-release assembly 1 of the conveyor further includes a luer connector 14 and a gripper 16. The distal inner cavity 132 of the luer connector 14 is inserted with the gripper 16, and the sheath core 15 passes through the gripper 16; the distal end of the luer connector 14 is inserted and screwed into the proximal inner cavity of the movable member 13. When inserted, the gripper 16 fastens the sheath core 15; the sheath core 15 is fixed in the distal inner cavity 132 of the luer connector 14 through the gripper 16, and the distal end of the luer connector 14 is fixed to the movable member 13 by means of threaded connection, thereby realizing the structure in which the sheath core 15 is fixedly installed relative to the movable member 13, so as to ensure that the sheath core 15 undergoes axial slip as the movable member 13 moves axially, realizing post-release; wherein, the gripper 16 is provided with a tubular cavity that penetrates through the front and back, and the distal end is formed by elastic sheets that are separated from each other, and the distal side walls of the elastic sheets bulge outwards; when the gripper 16 is inserted into the distal end of the luer connector 14, the protrusions on the distal side walls of the elastic sheets are in interference fit with the inner cavity of the luer connector 14, thereby further pressing the sheath core 15 to achieve stable clamping.

[0055] In this embodiment, please refer to Figures 6 - 9 , there are two first short grooves 1101, and they are respectively arranged on both sides of the first long groove 1102 in the circumferential direction, and together with the first long groove 1102, they form a "T"-shaped first surface chute 111. When the first convex block 121 of the rotating member 12 is in the initial first short groove 1101, the movable member 13 is in a locked state relative to the fixed member 11 and cannot undergo axial slip; when the first convex block 121 is in the first long groove 1102 at the middle position, at this time, both the first convex block 121 and the second convex block 122 can axially slide relative to the long groove; when the first convex block 121 rotates beyond the first long groove 1102 at the middle position and continues to rotate to the first short groove 1101 on the other side, the first convex block 121 cannot axially move relative to the first surface chute 111, and the second convex block 122 can still axially slide along the second long groove 1302.

[0056] Preferably, please refer to Figure 9 , in another embodiment, the first limiting block 130 can be respectively arranged in the first short grooves 1101 on both sides, or can be arranged in one of the first short grooves 1101.

[0057] Embodiment Two

[0058] In this embodiment, please refer to Figure 10 and Figure 11, the structure of the conveyor rear release assembly 1 and the structure of the conveyor 100 are substantially the same as those in the first embodiment. The difference is that there is one first short groove 1101, which is provided on any side of the first long groove 1102 in the circumferential direction, and together with the first long groove 1102, it forms an "L"-shaped first surface sliding groove 111. And when the first convex block 121 is located in the first short groove 1101, the second convex block 122 is located in the second short groove 1301; when the convex blocks 180 at both ends are located in the short groove 120, the axial sliding of the convex blocks 180 is restricted by the axial length of the short shaft and is in a locked state. At this time, the moving part 13 cannot slide axially relative to the fixed part 11; when the rotating part 12 rotates, and the first convex blocks 121 and the second convex blocks 122 at both ends slide out of the short groove 120 and slide towards the long groove 110, the first convex blocks 121 and the second convex blocks 122 at both ends can slide in the long groove 110, and then the moving part 13 can slide axially relative to the fixed part 11, realizing the release of the sheath core 15 of the rear withdrawal bracket.

[0059] Embodiment 3

[0060] In this embodiment, please refer to Figures 17 - 18 , the structure of the conveyor rear release assembly 1 and the structure of the conveyor 100 are substantially the same as those in the first embodiment. The difference is that the fixed part 11 is provided with a first surface sliding groove 111, the moving part 13 is provided with a second surface sliding groove 131, the first surface sliding groove 111 includes a first long groove 1102, the second surface sliding groove 131 includes a second long groove 1302, the convex block 180 includes a first convex block 121 at the distal end and a second convex block 122 at the proximal end, and the projections of the first convex block 121 and the second convex block 122 on the radial section of the rotating part 12 form an angle of 180° with the axis of the center; with such a setting, the first surface sliding groove 111 and the second surface sliding groove 131 are respectively arranged opposite to the first convex block 121 and the second convex block 122; thereby ensuring that the first convex block 121 slides in the first surface sliding groove 111, the second convex block 122 slides in the second surface sliding groove 131, and the first convex block 121 and the second convex block 122 rotate synchronously. When the first convex block 121 slides into the first long groove 1102 and the second convex block 122 slides into the second long groove 1302, both the first convex block 121 and the second convex block 122 can slide axially along the first long groove 1102 and the second long groove 1302 at the same time.

[0061] Embodiment 4

[0062] In this embodiment, please refer to Figures 12 - 15, the structure of the post-release component 1 of the conveyor and the structure of the conveyor 100 are substantially the same as those in the first embodiment. The difference is that a raised third limit block 160 is provided along the edge position of the outer wall of the proximal end of the fixing member 11, and a raised fourth limit block 170 is provided along the edge position of the inner wall of the distal end of the rotating member 12. When the third limit block 160 and the fourth limit block 170 approach each other, they abut against each other to form an axial limit structure; the third limit block 160 is a convex ring structure raised along the edge position of the outer wall of the proximal end of the fixing member 11, and the fourth limit block 170 is a convex ring structure raised along the edge position of the inner wall of the distal end of the rotating member 12. The two convex ring structures can abut against each other when the rotating member 12 moves axially relative to the fixing member 11 to form an axial limit structure to prevent the rotating member 12 from slipping off the fixing member 11.

[0063] Preferably, in this embodiment, when the third limit block 160 and the fourth limit block 170 are provided, the second limit block 150 is not provided in the first long groove 1102.

[0064] Embodiment Five

[0065] In this embodiment, please refer to Figure 8 , Figure 9 and Figure 11 , the structure of the post-release component 1 of the conveyor and the structure of the conveyor 100 are substantially the same as those in the first and second embodiments. The difference is that a second limit block 150 is further provided in the first long groove 1102. The second limit block 150 is provided in the part of the first long groove 1102 that extends beyond the short groove 120 in the length direction. The length of the first long groove 1102 has a part that extends beyond the first short groove 1101 compared with the first short groove 1101. This part is the part where the convex block 180 can axially slide in the first long groove 1102. By providing the second limit block 150 in this part, it can play a limiting role when the convex block 180 slides axially along the first long groove 1102 to avoid the axial slipping of the rotating member 12 relative to the fixing member 11; it can be understood that the second limit block 150 is only provided in the first long groove 1102 of the fixing member 11, so as to only limit the axial movement of the first convex block 121 in the first long groove 1102 to avoid the axial slipping of the rotating member 12 after assembly. However, when the user increases the pulling force, the first convex block 121 can further slide axially along the first long groove 1102 to realize the axial retreat of the axes of the two long grooves or a larger axial retreat of the length; increase the retreat distance of the sheath core 15 and increase the release stroke of the post-release.

[0066] Embodiment Six

[0067] In this embodiment, please refer to Figures 19 - 21, the structure of the release component 1 behind the conveyor and the structure of the conveyor 100 are substantially the same as those in the first and second embodiments. The difference is that in order to enable the sheath core 15 to be pushed a certain distance in the distal direction after the stent is released, so as to avoid the guiding head at the front end of the sheath core 15 from blocking the access of the conveyor of the internal iliac stent. Specifically, please refer to Figure 20 and Figure 21 , a plurality of second short grooves 1301 can be provided along the axial direction of the second surface chute of the movable member 13 towards the proximal direction. The plurality of second short grooves 1301 are arranged at intervals to form a multi-segment limiting member structure, and the plurality of second short grooves 1301 are communicated through a second long groove 1302. Here, the length of the connecting column 140 and the length of the rotating member 12 are correspondingly lengthened. With such a setting, when the second convex block is pulled out from the distal end of the second long groove 1032, the sheath core 15 can be released by retreating relative to the stent. And when it is necessary to push the sheath core 15 back in the distal direction to avoid the orifice of the internal iliac blood vessel, the movable member 13 is pushed distally to make the second convex block slide out of the distal second short groove 1301, and after sliding out, it moves along the second long groove 1302 to the proximal second short groove 1301, so as to realize the distal movement of the sheath core 15 on the axis and be able to move into the proximal second short groove 1301 to realize axial limitation.

[0068] Furthermore, please refer to Figure 21 and Figure 22 , the second surface chute of the movable member 13 along the axial direction towards the proximal direction further includes at least an annular short groove 1303 arranged at intervals with the second short groove 1301. The second long groove 1302 is circumferentially communicated with the second short groove 1301 and the annular short groove 1303 respectively, so that the second convex block can slide along the second long groove 1302 not only towards the distal end of the movable member 13, but also towards the proximal direction and slide into the annular short groove to be used for realizing the circumferential rotation of the movable member 13.

[0069] Here, please refer to Figure 22 and Figure 23, when the movable member 13 retracts towards the proximal end, in order to prevent the rotation of the sheath core 15 from causing torsion or displacement of the stent at the distal end, the connecting column 140 is provided with a non-circular cross-section block 1402 at least at the proximal part to limit the circumferential rotation. Among them, a connecting blind hole 1311 is opened at the distal end of the movable member 13. The connecting blind hole 1311 includes a non-circular cross-section hole 13111 and a circular cross-section hole 13112 along the axis. Moreover, a non-circular cross-section hole 13111 is provided between the distal end opening of the connecting blind hole 1311 and the distal position of the annular short groove 1303, and a circular cross-section hole 13112 is provided at least at the axial position opposite to the annular short groove 1303; when the second convex block slides along the long groove into the annular short groove 1303, the non-circular cross-section block 1402 slides into the circular cross-section hole 13112. The purpose of setting the non-circular cross-section hole 13111 is to limit the circumferential movement of the non-circular cross-section block 1402 so that when the movable member 13 moves towards the distal end and is in the retracted position, circumferential rotation is avoided, and when the rotating member 12 is unlocked, the movable member 13 is prevented from rotating, avoiding the rotation of the sheath core 15 causing the stent to twist. The purpose of setting the circular cross-section hole 13112 is that when the non-circular cross-section block 1402 moves to the position of the circular cross-section hole 13112, at this time the second convex block moves into the annular short groove 1303, and the front end of the sheath core 15 has completed the movement towards the distal end. At this time, since the sheath core 15 is relatively thin and the supporting strength is limited, after the post-release of the stent, it will tilt and bend in any direction in the body due to gravity or other factors, thereby blocking the insertion of the sheath core 15 or auxiliary instruments such as guide wires during the delivery of the internal iliac stent. Here, the rotation of the movable member 13 can drive the rotation of the sheath core 15 so as to adjust the distal anchor or the guiding head to deflect to a direction that does not block the internal iliac blood vessel, thereby avoiding the influence of the sheath core 15 on the subsequent implantation of the stent.

[0070] Specifically, please continue to refer to Figure 22 and Figure 23 , the shape of the non-circular cross-section block 1402 is adapted to the shape of the non-circular cross-section hole 13111, and the diameter of the circular cross-section hole 13112 is greater than the maximum radial dimension of the non-circular cross-section block 1402; the shape of the non-circular cross-section block 1402 being adapted to the shape of the non-circular cross-section hole 13111 can enable the movable member 13 to be restricted from circumferential rotation when sliding axially towards the proximal end, thereby avoiding the rotation of the sheath core 15, and when the rotating member 12 is unlocked, preventing the movable member 13 from rotating and avoiding the rotation of the sheath core 15 causing the stent to twist; further, in order to enable the non-circular cross-section block 1402 to rotate freely when moving to the circular cross-section hole 13112, the diameter of the circular cross-section hole 13112 is made greater than the maximum radial dimension of the non-circular cross-section block 1402, thereby avoiding the rotation of the non-circular cross-section block 1402 being affected and ensuring the smooth progress of the rotation.

[0071] In this embodiment, please refer toFigure 23 and Figure 24 Between the proximal end of the fixing block and the non-circular cross-section block 1402, the connecting column 140 includes a connecting rod 1401. To ensure that the rotation of the non-circular cross-section block 1402 is not restricted when it enters the circular cross-section hole 13112, the maximum diameter of the connecting rod 1401 is less than or equal to the minimum radial dimension of the non-circular cross-section hole 13111. Thus, when the non-circular cross-section block 1402 moves within the non-circular cross-section hole 13111, its axial rotation is restricted. At this time, the sheath core 15 can or cannot slide axially. When the non-circular cross-section block 1402 reaches the circular cross-section hole 13112 due to the forward push of the moving part 13, the moving part 13 can rotate. At this time, the connecting rod 1401 of the connecting column 140 is located within the non-circular cross-section hole 13111, avoiding affecting the rotation of the moving part 13 and ensuring that the moving part 13 can circumferentially adjust the direction of the sheath core 15 after being pushed forward towards the distal end to avoid the subsequent entering guide wire or another sheath core 15.

[0072] In some embodiments, please refer to Figure 24 and Figure 25 The axial length of the connecting column 140 is equal to the length of the connecting blind hole 1311, and the bottom of the connecting blind hole 1311 is opposite to the proximal end of the annular short groove 1303. The circular cross-section hole 13112 is located at the bottom of the hole. Thus, when the non-circular cross-section block 1402 of the connecting column 140 moves into the circular cross-section hole 13112 of the connecting blind hole 1311, it abuts against the bottom of the hole. Among them, the side wall of the circular cross-section hole 13112 near the bottom of the hole is provided with an internal thread structure 131121, and at least part of the non-circular cross-section block 1402 is provided with a circular arc surface, and the circular arc surface can be provided with an external thread structure 1403, so as to be threadedly engaged with the internal thread structure 131121. In this way, the non-circular cross-section block 1402 can be finely adjusted in direction by means of threaded rotation within the circular cross-section hole 13112, thereby ensuring the stability of the rotation of the distal end of the sheath core 15 in the body.

[0073] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A conveyor post-release assembly, characterized in that, It includes a sheath core, a fixed member, a movable member, and a rotating member each having an internal cavity. The proximal end of the sheath core sequentially passes through the cavities of the fixed member, the rotating member, and the movable member and is fixedly connected to the movable member. A connecting post with a non-circular radial cross-section is provided on the proximal side of the fixed member, and the connecting post is axially slidably connected to the distal end of the movable member. The rotating member is sleeved on the fixed member and the movable member and covers at least a part of the outer surface of the proximal side of the fixed member and a part of the outer surface of the distal side of the movable member. The rotating member can rotate circumferentially relative to the fixed member and the movable member, so that the movable member can be axially locked or slid relative to the fixed member.

2. The conveyor post-release assembly according to claim 1, wherein A first surface chute is provided on the outer surface of the proximal side of the fixed member, and a second surface chute is provided on the outer surface of the distal side of the movable member. Protrusions are provided at both ends of the inner side wall of the rotating member close to the axial direction, and the protrusions are respectively arranged in the first surface chute and the second surface chute and can respectively slide in the first surface chute and the second surface chute.

3. The conveyor post-release assembly according to claim 2, wherein, Both the first surface chute and the second surface chute include a long chute and a short chute that are continuously arranged in the circumferential direction, and the axial length of the long chute in one of the chutes is greater than the axial length of the short chute. The long chute of the first surface chute penetrates the proximal end face of the fixed member, and the long chute of the second surface chute penetrates the distal end face of the movable member.

4. The conveyor post-release assembly according to claim 3, wherein, A raised first limiting block is provided at a position where the short chute is close to the long chute in the circumferential direction, and the raised height of the first limiting block is less than the groove depth of the corresponding short chute.

5. The conveyor post-release assembly according to claim 3, wherein, The first surface chute includes a first short chute, the second surface chute includes a second short chute, and the two protrusions include a first protrusion at the distal end and a second protrusion at the proximal end. When the second protrusion slides into the second short chute, the first protrusion slides into the first short chute.

6. The conveyor post-release assembly according to claim 5, wherein The first surface chute includes a first long chute, the second surface chute includes a second long chute. When the second protrusion slides into the second long chute, the first protrusion slides into the first long chute or the first short chute.

7. The conveyor post-release assembly according to claim 6, wherein, The second surface chute further includes at least an annular short chute spaced from the second short chute in the axial direction toward the proximal end. At least the proximal part of the connecting post is provided with a non-circular cross-section block. A connecting blind hole is provided at the distal end of the movable member, and a circular cross-section hole is provided at least at an axial position opposite to the annular short chute in the blind hole. When the second protrusion slides along the long chute into the annular short chute, the non-circular cross-section block slides into the circular cross-section hole.

8. The conveyor post-release assembly according to claim 7, wherein, A non-circular cross-section hole is provided between the distal end opening of the connecting blind hole and the distal position extending to the annular short chute. The shape of the non-circular cross-section block is adapted to the shape of the non-circular cross-section hole, and the diameter of the circular cross-section hole is greater than the maximum radial dimension of the non-circular cross-section block.

9. The conveyor post-release assembly according to claim 8, wherein, A connecting rod is included between the proximal end of the fixed block and the non-circular cross-section block of the connecting post, and the maximum diameter of the connecting rod is less than or equal to the minimum radial dimension of the non-circular cross-section hole.

10. A conveyor, characterized in that, It includes a handle assembly, an outer sheath tube, and a post-release assembly of the conveyor according to any one of claims 1-9. The outer sheath tube is connected to the distal end of the handle assembly; the post-release assembly of the conveyor is fixedly connected to the proximal end of the handle assembly. After connection, the sheath core can movably pass through the outer sheath tube; an anchoring member is provided on the side wall of the distal end of the sheath core. When the movable member slides towards the proximal end, the anchoring member is driven by the sheath core to slide towards the proximal end to release the bracket.

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