Bracket manufacturing tool and manufacturing method

Abstract

The present invention relates to a stent manufacturing tool and a manufacturing method. The stent manufacturing tool includes a main structure and a support member, wherein the support member is installed on the main structure, and a receiving groove is provided on the end face of the support member away from the main structure. The support member is at least partially located on the outside of the main structure and can move relative to the main structure. Thus, by installing the support member on the main structure and providing a receiving groove on the support member, a corrugated ring can be installed in the receiving groove. After the inner connecting layer, the outer connecting layer and the corrugated ring are bonded, the support member can move relative to the main structure, so that the support member can slide between a first position and a second position. Therefore, after the tubular body completes heat treatment, the position of the support member can be adjusted to allow the tubular body to fall off by itself, thereby preventing the main structure from pulling the corrugated ring and causing deformation of the stent.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a stent manufacturing tool and a manufacturing method. Background Art

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

[0003] During the stent graft manufacturing process, a corrugated ring is mounted on a fixture, and then the inner and outer connecting layers on either side of the ring are heat-pressed and bonded. Prior art fixtures typically include a groove for accommodating the ring. During demolding, this groove interferes with the ring's removal, causing tension on the inner and outer connecting layers and resulting in stent deformation. Summary of the Invention

[0004] Based on this, it is necessary to provide a bracket manufacturing tool, including a main structure and a support member, the support member is installed on the main structure, and a accommodating groove is provided on the end face of the support member away from the main structure. The support member is at least partially located on the outside of the main structure and can move relative to the main structure.

[0005] Compared with the prior art, the stent manufacturing tool and stent manufacturing method of the present invention have the following beneficial effects: the present invention is installed on the main structure through a support member, and a receiving groove is provided on the support member so that the corrugated ring can be installed in the receiving groove. After the inner connecting layer, the outer connecting layer and the corrugated ring are bonded, the support member can move relative to the main structure so that the support member can slide between the first position and the second position. Therefore, after the tubular body completes the heat treatment, the position of the support member can be adjusted to make the tubular body fall off by itself, thereby avoiding the main structure pulling the corrugated ring and causing deformation of the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic structural diagram of a bracket in an embodiment of the present invention;

[0007] Figure 2 Schematic diagram of the structure of the stent manufacturing tool in the first embodiment of the present invention;

[0008] Figure 3 Schematic diagram of the exploded structure of the stent manufacturing tool in the first embodiment of the present invention;

[0009] Figure 4 Schematic diagram of the structure of the support member in the first embodiment of the present invention when it is in the second position;

[0010] Figure 5 A top view of the support member in the first embodiment of the present invention when the support member is in the first position;

[0011] Figure 6 A top view of the support member in the first embodiment of the present invention when it is in the second position;

[0012] Figure 7 For the present invention Figure 3 Schematic diagram of the cross-sectional structure at AA in FIG;

[0013] Figure 8 This is a schematic structural diagram of a bracket manufacturing assembly in a second embodiment of the present invention;

[0014] Figure 9 This is a schematic diagram of the exploded structure of the bracket manufacturing assembly in the second embodiment of the present invention;

[0015] Figure 10 For the present invention Figure 8 A schematic diagram of the structure enlargement at point A;

[0016] Figure 11 For the present invention Figure 8 A magnified schematic diagram of the structure at point B in FIG.

[0017] Figure 12 This is a structural diagram of the supporting member in the second embodiment of the present invention when it is in the second position;

[0018] Figure 13 This is a structural diagram of a second embodiment of the present invention in which an elastic protrusion is provided on the support member;

[0019] Figure 14 For the present invention Figure 13 A magnified schematic diagram of the structure at position C in FIG;

[0020] Figure 15 This is a schematic structural diagram of a bracket manufacturing assembly in Example 3 of the present invention;

[0021] Figure 16 This is a schematic structural diagram of a supporting member in a third embodiment of the present invention when the supporting member is in a first position;

[0022] Figure 17 This is a schematic structural diagram of the supporting member in the third embodiment of the present invention when it is in the second position;

[0023] Figure 18 For the present invention Figure 15 A magnified schematic diagram of the structure at D in FIG.

[0024] Figure 19 For the present invention Figure 18 A schematic diagram of the structure at E in FIG.

[0025] Figure 20 Schematic diagram of the structure of the telescopic mechanism in the third embodiment of the present invention;

[0026] Figure 21 This is a schematic structural diagram of the telescopic mechanism in embodiment 3 of the present invention when it is in another state;

[0027] Figure 22 Schematic diagram of the structure of the locking mechanism in the third embodiment of the present invention;

[0028] Figure 23 This is a flowchart of the stent manufacturing method in Example 4 of the present invention. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Example 1

[0031] This embodiment provides a stent manufacturing tool 300, such as Figures 1 to 3 As shown, it includes a main structure 310 and a support member 320 . The support member 320 is installed on the main structure 310 . The support member 320 is at least partially located outside the main structure 310 and can move relative to the main structure 310 .

[0032] like Figure 1 As shown, stent 900 includes a tubular body 910 and a coating 920. Coating 920 is sutured to tubular body 910. Tubular body 910 includes an inner connecting layer, a corrugated ring, and an outer connecting layer. The inner connecting layer, the corrugated ring, and the outer connecting layer are bonded together, and the inner and outer connecting layers are used to connect multiple corrugated rings. This embodiment does not limit the shape of the inner and outer connecting layers; specifically, the inner and outer connecting layers can have a mesh structure or a linear structure.

[0033] like Figure 2 、 Figure 3As shown, the main structure 310 is used to mount the support member 320. The main structure 310 can be a support frame structure, a columnar structure, or any other structure that can mount the support member 320. A guide hole 311 is provided on the side wall of the main structure 310. The guide hole 311 is arranged along a first direction f3. The position of the guide hole 311 corresponds to the position of the support member 320, and the support member 320 is slidably connected to the guide hole 311. The angle between the first direction f3 and the axis of the main structure 310 is 20 to 160 degrees. Specifically, the angle a1 between the first direction f3 and the main structure 310 is 20 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 130 degrees, or 160 degrees. Thus, the guide hole 311 restricts the support member 320 from moving only in the first direction, thereby guiding the support member 320 and preventing the support member 320 from slipping during the winding process and causing winding misalignment.

[0034] like Figure 3 As shown, the support member 320 is a rod-shaped structure. The support member 320 is inserted into the guide hole 311. The outer wall of the support member 320 is in contact with the inner wall of the guide hole 311, and the support member 320 can slide in the guide hole 311. The support member 320 includes a mounting portion 322, which is located at the end of the support member 320 away from the main structure 310. The winding groove 321 and the receiving groove 324 are provided on the mounting portion 322. The winding groove 321 corresponds to the outline of the inner connecting layer. Specifically, the winding groove 321 can be a mesh structure, a strip structure or a corrugated structure. The winding groove 321 is used to accommodate the connecting wire, and the connecting wire is wound on the winding groove 321 to form the inner connecting layer. The receiving groove 325 corresponds to the outline of the wave-shaped ring, and the wave-shaped ring is received in the receiving groove 325.

[0035] The support member 320 includes a first position and a second position relative to the main structure 310, such as Figure 2 As shown, when the support member 320 is in the first position, the distance between the end of the support member 320 away from the main structure 310 and the side wall of the main structure 310 is larger; Figure 4 As shown, when the support member 320 is in the second position, the distance between the end of the support member 320 away from the main structure 310 and the side wall of the main structure 310 is small. Figure 5 As shown, when the support member 320 is in the first position, the inner connecting layer, the corrugated ring and the outer connecting layer are loaded on the support member 320; Figure 6 As shown, when the support member 320 is in the second position, the tubular body 910 falls off from the support member 320.

[0036] In one embodiment, Figure 2As shown, during the process of the support member 320 moving from the second position to the first position, the support member 320 slides along the first direction, and the vertical distance between the end of the support member 320 away from the main structure 310 and the outer wall of the main structure 310 increases until the support member 320 is in the first position; Figure 4 As shown, during the process of the support member 320 moving from the first position to the second position, the support member 320 slides in a direction opposite to the first direction, and the vertical distance between the end of the support member 320 away from the main structure 310 and the outer wall of the main structure 310 decreases until the support member 320 is in the second position.

[0037] The advantage of this arrangement is that after the inner connecting layer, the outer connecting layer and the corrugated ring are bonded together to form the tubular body 910, the support member 320 can move relative to the main structure 310, so that the support member 320 can slide between the first position and the second position, thereby allowing the tubular body 910 to fall off by itself, avoiding the support member 320 pulling the tubular body 910 and causing deformation of the bracket.

[0038] Furthermore, if Figure 2 、 Figure 3 and Figure 5 As shown, in order to fix the support member 320 at the first position and the second position, the bracket manufacturing tool 300 also includes a limiting member 330. The support member 320 is provided with at least two limiting holes set at intervals, and the limiting member 330 can be inserted into one of the limiting holes.

[0039] like Figure 3 As shown, the main structure 310 is provided with a mounting hole 312, which is arranged along the second direction and located at the center of the main structure 310. A limiting member 330 is sequentially inserted into the mounting hole 312 and the limiting hole, and the limiting member 330 can slide back and forth along the second direction. The support member 320 includes a sliding portion 323, and the mounting portion 322 is connected to the end of the sliding portion 323 away from the limiting member 330. The limiting holes are provided on the sliding portion 323, and the limiting holes include a first limiting hole 3231 and a second limiting hole 3232. The first limiting hole 3231 is located on the side of the second limiting hole 3232 away from the mounting portion 322.

[0040] In this embodiment, when the support member 320 slides from the second position to the first position, the limit member 330 penetrates into the main structure 310 from the mounting hole 312 and is inserted into the first limit hole 3231. Thus, the limit member 330 can fix the support member 320 in the first position. When the wavy ring is sleeved on the main structure 310 and abuts against the outer wall of the mounting portion 322, the support member 320 can be prevented from moving in the first direction under the radial contraction pressure of the wavy ring, thereby preventing the wavy ring from falling off; when the support member 320 needs to slide from the first position to the second position, the limit member 330 is pulled out from the first limit hole 3231, the support member 320 slides to the second position, and then the limit member 330 is inserted into the second limit hole 3232 to fix the support member 320 in the second position.

[0041] It is worth explaining that after the installation of the corrugated ring, in order to ensure that the inner connecting layer and the corrugated ring have a certain fitting force, the distance between the end of the support member 320 located on the outside of the main structure 310 and the axis of the main structure 310 is greater than the radius of the corrugated ring, so that the support member 320 is away from the main structure. One end of 310 is against the inner wall of the corrugated ring and has a certain pressing force. At this time, if there is no limit member 330 to limit the support member 320, the corrugated ring will generate a radial contraction force on the support member 320. At this time, the support member 320 will move in the opposite direction of the first direction f3, and the force between the support body 320 and the corrugated ring disappears, so that the inner connecting layer is easy to generate gaps or bubbles between the corrugated ring and the outer connecting layer, making it difficult to bond, thereby reducing the bonding stability of the inner connecting layer, the corrugated ring and the outer connecting layer. Therefore, by limiting the support member 320 through the limiting member 330, the limiting member 330 can limit the position of the support member 320, thereby preventing the support member 320 from sliding under the action of the radial contraction force of the corrugated annulus, thereby causing a gap or bubble to form between the inner connecting layer and the corrugated annulus and the outer connecting layer.

[0042] Furthermore, if Figure 3 As shown, in order to facilitate the positioning of the first limiting hole 3231 and the second limiting hole 3232 and the mounting hole 312, the support member 320 includes a first positioning block 3233 and a second positioning block 3234, the first positioning block 3233 is located on the inner side of the main structure 310, and the second positioning block 3234 is located on the outer side of the main structure 310, and the spacing distance between the first positioning block 3233 and the second positioning block 3234 is equal to the spacing distance between two adjacent limiting holes.

[0043] In this embodiment, the first positioning block 3233 and the second positioning block 3234 are located on the sliding portion 323, with the first positioning block 3233 located inside the guide hole 311 and the second positioning block 3234 located outside the guide hole 311. When the support member 320 moves from the second position to the first position, the support member 320 moves in the first direction until the first positioning block 3233 abuts against the inner wall of the main structure 310. At this time, the support member 320 is in the first position, and the first limiting hole 3231 and the mounting hole 312 are aligned on the same vertical line. When the support member 320 slides from the first position to the second position, the support member 320 moves in the opposite direction of the first direction until the second positioning block 3234 abuts against the outer wall of the main structure 310. At this time, the support member 320 is in the second position, and the second limiting hole 3232 and the mounting hole 312 are aligned on the same vertical line.

[0044] In this way, the first positioning block 3233 is located on the inner side of the main structure 310, and the second positioning block 3234 is located on the outer side of the main structure 310. The spacing distance between the first positioning block 3233 and the second positioning block 3234 is equal to the spacing distance between two adjacent limiting holes. When the support member 320 is in the first position, the first positioning block 3233 can position the support member 320, thereby realizing the alignment of the first limiting hole 3231 and the mounting hole 312. When the support member 320 is in the second position, the second positioning block 3234 can position the support member 320, thereby realizing the alignment of the second limiting hole 3232 and the mounting hole 312, thereby facilitating the insertion of the limiting member 330 into different limiting holes, avoiding the trouble of alignment.

[0045] Further, if Figure 5 、 Figure 6 As shown, in order to facilitate positioning of the wave-shaped ring in the circumferential direction, there are multiple support members 320, and the multiple support members 320 are arranged along the circumference of the main structure 310.

[0046] The main structure 310 is provided with a plurality of support members 320 arranged circumferentially along the axial direction of the main structure 310. The multiple support members 320 on the same circle can be arranged at equal or unequal intervals. The support members 320 present a radial structure in the cross-section of the main structure 310, that is, each support member 320 is arranged along the radial direction of the main structure 310 and faces the axis of the main structure 310. This embodiment does not limit the number of support members 320 on the same circle. Specifically, the number of support members 320 on the same circle can be 2, 4, 5, or 8. Similarly, the multiple support members 320 on each circle can be located on the same plane or on different planes. In other embodiments, the outer wall of the mounting portion 322 has an arcuate surface structure, which can facilitate the outer wall of the mounting portion 322 to fit the corrugated ring.

[0047] Furthermore, in order to avoid collision and interference between different support members 320 on the inner side of the main structure 310, as shown in FIG. Figure 2 、 Figure 3 As shown, the support member 320 includes a sliding portion 323 , which is located on the inner side of the main structure 310 . The sliding portions 323 on different support members 320 are arranged in sequence along the axial direction of the main structure 310 .

[0048] It should be noted that the support member 320 includes a sliding portion 323, a positioning portion 324, and a mounting portion 322, which are connected in sequence. The sliding portion 323 is located inside the main structure 310. The sliding portions 323 on multiple support members 320 in the same circle are not in the same plane. Therefore, when all support members 320 move toward the center of the main structure 310, the different support members 320 will not interfere with each other and collide. The positioning portion 324 is located within the guide hole 311. The diameter of the positioning portion 324 is larger than the diameter of the sliding portion 323. The guide holes 311 in the same circle are in the same plane. Therefore, by setting the diameter of the positioning portion 324 larger than the diameter of the sliding portion 323, when the different sliding portions 323 are arranged in sequence along the axis of the main structure 310, the axis lines of the positioning portion 324 can also be located in the same radial plane, thereby enhancing the circumferential positioning performance of the mounting portion 322 on the corrugated ring.

[0049] Further, if Figure 2 As shown, in order to support the support member 320 , the stent manufacturing tool further includes a supporting member 340 . The supporting member 340 is installed on the inner side of the main structure 310 and arranged radially along the main structure 310 . The supporting member 340 is used to support the support member 320 .

[0050] It should be noted that the supporting member 340 is welded or screwed to the inner wall of the main structure 310, the supporting member 340 is arranged along the first direction f3, the supporting member 340 is in contact with the side wall of the support member 320, and the supporting member 340 is located on the lower side of the support member 320. In this way, when multiple sliding parts 323 are overlapped with each other, the supporting member 340 is in contact with the side wall of the support member 320, so that the supporting member 340 can support the support member 320, thereby avoiding the sliding part 323 at the lower end from being compressed and shifting downward, making it difficult to insert the limiting member 330 into the limiting hole.

[0051] Further, if Figure 2 、 Figure 3As shown, to facilitate the installation of the support member 320, the main structure 310 also includes a first housing portion 313 and a second housing portion 314. The first housing portion 313 and the second housing portion 314 are both arc-shaped structures, and the side end surfaces of the first housing portion 313 and the second housing portion 314 are in contact with each other. The first housing portion 313 includes a first connecting member 3131, and the second housing portion 314 includes a second connecting member 3141. The first connecting member 3131 is provided with a first connecting hole, and the second connecting member 3141 is provided with a second connecting hole. The fastener 315 is inserted into the first and second connecting holes. The mounting hole 312 also penetrates the first and second connecting members 3131 and 3141, wherein the areas where the first and second connecting holes are provided do not intersect with the area where the mounting hole 312 is provided.

[0052] Further, if Figure 3 、 Figure 7 As shown, during the demoulding process, in order to reduce the pulling effect of the main structure 310 on the tubular body 910, at least one side wall of the accommodating groove 325 and / or the winding groove 321 includes a guide surface structure 3251, and the guide surface structure 3251 is an arc-shaped surface or an inclined surface.

[0053] It should be noted that the accommodating groove 325 is used to accommodate the corrugated annular object. The contour of the accommodating groove 325 corresponds to the contour of the corrugated annular object, and the accommodating groove 325 is arranged along the circumference of the main structure 310. The accommodating groove 325 includes a first sidewall and a second sidewall in the axial direction of the main structure 310. The first sidewall and the second sidewall are opposite each other, and the guide surface structure 3251 is located on the first sidewall and / or the second sidewall. The guide surface structure 3251 can be a curved surface structure or a sloped surface structure. The winding groove 321 is used to accommodate the connecting wire, and the guide surface structure 3251 is also arranged on the sidewall of the winding groove 321.

[0054] In this way, during the falling-off process of the tubular main body 910, at least one inner wall of the receiving groove 325 and / or the winding groove 321 includes a guide surface structure 3251, so that the tubular main body 910 can fall off along the guide surface structure 3251, thereby reducing the obstruction of the receiving groove 325 and the winding groove 321 to the demolding process of the tubular main body 910, avoiding the right-angled opening of the winding groove 321 from pulling on the inner connecting layer and causing deformation of the inner connecting layer, thereby improving the manufacturing efficiency of the bracket.

[0055] In other embodiments, a release layer is provided on the inner wall of the winding groove 321. The release layer can be made of either tin foil or aluminum foil. The release layer can reduce the adhesion between the inner connecting layer and the winding groove 321, thereby reducing the difficulty of the inner connecting layer slipping off the winding groove 220.

[0056] Example 2

[0057] This embodiment provides a stent manufacturing tool, such as Figure 8 、 Figure 9 As shown, it includes a main structure 410, a pressing device 430 and a support member 420. The support member 420 is installed on the main structure 410. The support member 420 can reciprocate along the first direction. The pressing device 430 is respectively connected to or abuts the main structure 410 and the support member 420. The pressing device 430 is used to provide elastic supporting force for the support member 420 when the support member 420 is under pressure.

[0058] It should be noted that the main structure 410 is used to provide installation space for the support member 420. The main structure 410 can be a support frame structure, a columnar structure, or any other structure that can be installed with the support member 420. In this embodiment, the main structure 410 includes a main structure body and a limiter 450. The main structure body is a cavity structure (i.e., the interior of the main structure body is hollow). The limiter 450 is installed in the main structure body. The top pressure device 430 is connected to the limiter 450 and the support body 420 respectively. In this way, by setting the interior of the main structure body to be hollow, the space inside the main structure body can provide movement margin for the support body. By installing the limiter 450 in the main structure body and connecting the top pressure device 430 to the limiter 450, the limiter 450 can fix the top pressure device 430, thereby realizing the installation of the top pressure device 430.

[0059] like Figure 9 As shown, a guide hole 411 is provided on the main structure body, and the guide hole 411 is arranged along the first direction f3. The support member 420 is inserted into the guide hole 411 and can slide within the guide hole 411. The guide hole 411 runs through the side wall of the main structure 410. Thus, the guide hole 411 can guide the support body 420 through the provision of the guide hole 411, thereby preventing the support body 420 from tilting during movement, causing the wave-shaped ring to shift, causing traction on the inner connecting layer and causing deformation of the stent. The angle between the first direction f3 and the axis of the main structure 410 is 20 to 160 degrees. Specifically, the angle a1 between the first direction f3 and the main structure 410 is 20 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 130 degrees, or 160 degrees. Therefore, the guide hole 411 limits the support member 420 to move only in the first direction, thereby guiding the support member 420 and preventing the support member 420 from slipping during the winding process and causing winding dislocation.

[0060] In other embodiments, the main structure 410 is a solid structure, and an installation groove is opened on the main structure 410, and the installation groove is arranged along the first direction. The support member 420 is inserted into the installation groove and can slide along the opening direction of the installation groove. The pressing device 430 is installed in the installation groove, and the pressing device 430 is connected to one end of the support member 420 close to the center of the main structure 410.

[0061] like Figure 9 As shown, the support member 420 includes a mounting portion 421, which is located at the end of the support member 420 away from the main structure 410. A winding groove 422 is defined on the mounting portion 421. The winding groove 422 corresponds to the contour of the inner connecting layer. Specifically, the winding groove 422 can have a mesh structure, a strip structure, or a corrugated structure. The winding groove 422 is used to accommodate the connecting wire, which is wound around the winding groove 422 to form the inner connecting layer. The mounting portion 421 also has a receiving groove, in which the corrugated ring is installed.

[0062] In this embodiment, if Figure 10 As shown, the pressing device 430 includes an elastic member 431, which is sleeved on the support member 420. The support member 420 includes an annular protrusion structure 423. One end of the elastic member 431 is in contact with the annular protrusion structure 423, and the other end of the elastic member 431 is in contact with the inner wall of the stop member 450. When the support member 420 moves in a direction opposite to the first direction under the action of an external force, the annular protrusion structure 423 squeezes the elastic member 431, causing the elastic member 431 to provide an elastic reaction force for the support member 420. In other embodiments, the elastic member 431 can also be arranged in parallel with the support member 420, with one end of the elastic member 431 welded to the stop member 450 and the other end of the elastic member 431 welded to the side wall of the support member 420. In other embodiments, the pressing device 430 can be an active clamping cylinder.

[0063] Because, in the initial position (i.e., the first position in this article), the distance between the end of the support body 420 away from the main structure 410 and the axis of the main structure 410 is greater than the radius of the corrugated ring. In this way, when the corrugated ring is installed on the support body, since the radius of the corrugated ring in the initial state is smaller than the distance between the end of the support body 420 away from the main structure 410 and the axis of the main structure 410, the corrugated ring has a tendency to restore its initial state, generating a radial contraction force on the support body 420, pushing the support body 420 to move toward the side close to the center of the main structure 410 until the force between the support body 420 and the corrugated ring disappears, thereby making it easy for the inner connecting layer installed on the support body 420 to generate gaps or form bubbles with the corrugated ring and the outer connecting layer, making it difficult to bond. The two ends of the elastic member 431 are respectively connected to the limit member 450 and the arc-shaped protrusion structure 423, so that the elastic member 431 can provide supporting force for the support member 420. When the corrugated ring generates a radial contraction force on the support member 420, the elastic force of the elastic member 431 on the support body 420 is greater than or equal to the contraction force of the corrugated ring, so that the support member 420 can push the inner connecting layer to always fit with the corrugated ring and the outer connecting layer. In this way, the bonding effect of the inner connecting layer, the outer connecting layer and the corrugated ring can be improved during the heat treatment process, thereby improving the fault tolerance of the bracket manufacturing.

[0064] In one embodiment, the support member 420 includes a first position and a second position, such as Figure 8 As shown, when the support member 420 is in the first position, the pressing device 430 pushes the support member 420 so that the annular protrusion structure 423 is in contact with the inner wall of the main structure 410. At this time, the distance between the end of the support member 420 away from the main structure 410 and the side wall of the main structure 410 is relatively large, and the inner connecting layer, the corrugated ring and the outer connecting layer are loaded on the support member 420. Figure 12 As shown, when the support member 420 is in the second position, the support member 420 pushes the first elastic member 431 to compress. At this time, the distance between the end of the support member 420 away from the main structure 410 and the side wall of the main structure 410 is closer, so that the tubular body 910 falls off from the support member 420 by itself.

[0065] The advantage of this arrangement is that, by installing the support member 420 on the main structure 410, the support member 420 can move in the first direction, so that the support member 420 can slide between the first position and the second position, so that the tubular body 910 can fall off by itself after heat treatment, avoiding the winding groove 422 pulling the inner connecting layer or the accommodating groove pulling the corrugated ring to cause deformation of the bracket; when the support member 420 is subjected to the radial contraction force of the corrugated ring, the top pressing device 430 is respectively connected to the main structure 410 and the support member 420, so that the top pressing device 430 can provide supporting force for the support member 420, avoiding the support member 420 moving in the opposite direction of the first direction during the heat treatment process to cause the tubular body 910 to fall off, thereby improving the fault tolerance of the bracket manufacturing.

[0066] Furthermore, if Figure 10 As shown, in order to prevent the support member 420 from tilting during the sliding process, a guide groove 424 is provided on the support member 420, and the guide groove 424 is arranged along the first direction. The main structure 410 includes a guide column 412, which is installed on the limit member 450 and inserted into the guide groove 424.

[0067] It should be noted that the guide groove 424 is opened on the side wall of the support member 420, and the guide groove 424 is a long strip or waist-shaped structure. The opening direction of the guide groove 424 is parallel to the opening direction of the guide hole 411. The side wall of the support member 420 is in contact with the side wall of the limit member 450. The opening of the guide hole 424 is at least partially in contact with the limit member 450. The guide column 412 is welded or threaded to the side wall of the limit member 450. The guide column 412 is inserted into the guide hole 424. A stop portion is provided at the end of the guide column 412 away from the limit member, and the stop portion is at least partially located on the outside of the guide groove 424. Therefore, the guide groove 424 is set along the first direction, and the guide column 412 is inserted into the guide groove 424, so that the guide column 412 can cooperate with the positioning of the guide groove 424, so that the support member 420 can only reciprocate along the first direction, thereby achieving the guidance of the support member 420, avoiding the support member 420 from tilting during the sliding process and pulling the inner connection layer, thereby weakening the pulling effect of the support member 420 on the inner connection layer.

[0068] Furthermore, if Figure 8 、 Figure 11 As shown, in order to achieve positioning of the support member 420 , the bracket manufacturing tool further includes a clamping member 440 , which is connected to the support member 420 and is used to fix or release the support member 420 .

[0069] It should be noted that if Figure 11 As shown, the locking part 440 includes a locking portion 441 and an elastic portion 442. The locking portion 441 is rotatably connected to the support member 420. The two ends of the elastic portion 442 are respectively connected to the locking portion 441 and the support member 420. The elastic portion 442 is used to press the locking portion 441 against the inner wall of the main structure 410.

[0070] The locking portion 441 can be a hook-shaped or arc-shaped structure, one end of the locking portion 441 is rotatably connected to the support member 420, and the other end is in contact with the inner wall of the slide groove 411 or the main structure 410. Specifically, a first connecting hole is provided at one end of the locking portion 441, and a second connecting hole is provided on the support member 420. A pin is passed through the first connecting hole and the second connecting hole to realize the rotatable connection between the locking portion 441 and the support member 420, and the end of the locking portion 441 away from the pin can rotate around the pin.

[0071] One end of the elastic portion 442 is connected to the locking portion 441 and provides an elastic force to the locking portion 441, and the other end is connected to the support member 420 and provides an elastic force to the support member 420. The elastic portion 442 is arranged along the second direction, wherein the second direction is perpendicular to the first direction. The elastic portion 442 is used to press the locking portion 441 against the inner wall of the guide hole 411.

[0072] In one embodiment, Figure 12As shown, when the support member 420 is in the second position, under the elastic force of the elastic part 442, one end of the locking part 441 is pressed against the opening edge of the guide hole 411, so that the locking part 441 hooks the support member 420 in the second position, and the force between the locking part 441 and the opening edge of the guide hole 411 is greater than the elastic restoring force of the elastic member 431, thereby achieving the fixation of the support member 420 in the second position and preventing the support member 420 from moving toward the first direction under the action of the elastic member, thereby interfering with the shedding of the inner connecting layer and the corrugated annular object. When the support member 420 needs to move from the second position to the first position, the support member 420 is pulled to move along the first direction, and the locking portion 441 moves toward the second direction under the interference of the guide hole 411 port, and the end of the locking portion 441 that is hooked with the opening edge of the guide hole 411 moves into the guide hole 411, so that the locking portion 441 loses its restraining effect on the support member 420, and the limiting effect of the locking portion 441 on the support member 420 is released, so that the support member 420 moves toward the first position under the elastic force of the elastic member 431 until the annular protrusion structure 423 is in contact with the inner wall of the main structure body, thereby realizing the reset of the first support member 420, thereby facilitating the winding of the connecting wire on the winding groove 422 and the installation of the corrugated ring on the mounting portion 421.

[0073] Furthermore, if Figure 12 As shown, after the engaging portion 441 is hooked onto the end surface of the guide hole 411, in order to facilitate the engaging portion 441 to slide into the guide hole 411 under the action of an external force, the engaging portion 441 includes a first end 4411, and the end surface of the first end 4411 away from the support member 420 has an arcuate surface structure. In this embodiment, the engaging portion 441 has an arcuate structure, and the first end 4411 refers to the end of the engaging portion 441 that is hooked onto the opening edge of the guide hole 411. The end surface of the first end 4411 has an arcuate surface structure, and the convex surface of the arcuate surface structure faces the inner wall of the guide hole 411. In this way, in the process of the locking portion 441 moving from the end face hooked on the guide hole 411 to the inner side of the guide hole 411, the locking portion 441 is made to fit with the inner wall of the guide hole 411 by pulling the support member 420 to move in the first direction, thereby releasing the locking portion 441 from limiting the support member 420. In the process of the support member 420 moving in the first direction, the end face of the locking portion 441 away from the support member 420 is arranged in an arc-shaped surface structure, so that the arc-shaped surface structure can reduce the force between the locking portion 441 and the end face of the guide hole 411, thereby reducing the difficulty of the locking portion 441 sliding into the guide hole 411.

[0074] In other embodiments, Figure 13 、 Figure 14As shown, the engaging member 440 includes an elastic protrusion 443 disposed on the sidewall of the support member 420. The elastic protrusion 443 can be ejected or retracted along a second direction, wherein the second direction f4 is perpendicular to the first direction f3. A positioning hole 413 is defined on the inner wall of the guide hole 411. When the support member moves to the first position, the elastic protrusion is located outside the guide hole 411, and the annular protrusion structure 423 abuts against the inner wall of the guide hole 411, thereby securing the support member 420 in the first position and preventing the support member 420 from sliding out of the guide hole 411 under the force of the elastic member. When the support member 420 moves to the second position, the elastic protrusion 443 engages with the positioning hole 413, securing the support member 420 in the second position. In this way, when the support member 420 slides to the first position, the elastic protrusion 443 pops out and embeds into the positioning hole 413 to limit the displacement of the support member 420. In the process of the connecting wire being wound around the winding groove 422, the support member 420 can be prevented from sliding and causing winding dislocation; when the support member 420 needs to slide from the first position to the second position, the elastic protrusion 443 retracts to avoid interfering with the movement of the support member 420.

[0075] Example 3

[0076] This embodiment provides a stent manufacturing tool 500, such as Figures 15 to 17 As shown, it includes a main structure 510, a telescopic mechanism 520 and a support member 530. The telescopic mechanism 520 is installed on the main structure 510 and is connected to the support member 530. The telescopic mechanism 520 is used to drive the support member 530 to reciprocate along the first direction f3.

[0077] The main structure 510 can be a support frame structure, a cavity structure, or a hollow structure. A notch is defined in the sidewall of the main structure 510, extending along a first direction. The support member 530 is at least partially located outside the notch, and the telescopic mechanism 520 is located inside the notch. The driving end of the telescopic mechanism 520 is screwed or welded to the support member 530.

[0078] The telescopic mechanism 520 is screwed or welded to the main structure 510. The telescopic mechanism 520 can be at least one of an electric push rod, a linear motor or a telescopic cylinder. The driving end of the telescopic mechanism 520 can reciprocate along the first direction to drive the support member 530 to move toward the side away from the notch or toward the side close to the notch.

[0079] The support member 530 includes a first position and a second position relative to the main structure 510. When the support member 530 is in the first position, the inner connecting layer, the corrugated ring and the outer connecting layer are loaded on the support member 530. When the support member 530 is in the second position, the inner connecting layer, the corrugated ring and the outer connecting layer fall off from the support member 530. Figure 16As shown, when the support member 530 is in the first position, the distance between the end of the support member 530 away from the main structure 510 and the notch 511 is relatively large, as shown in FIG. Figure 17 As shown, when the support member 530 is in the second position, the distance between the end of the support member 530 away from the main structure 510 and the notch is relatively small.

[0080] like Figure 15 As shown, a winding groove 531 is provided on the side wall of the support member 530 away from the main structure 510. The winding groove 531 corresponds to the outline of the inner connection layer. Specifically, the winding groove 531 can be a mesh structure, a strip structure or a corrugated structure. The winding groove 531 is used to accommodate the connecting wire, and the connecting wire is wound on the winding groove 531 to form the inner connection layer. A receiving groove 532 is provided on the end face of the support member 530 away from the main structure 510. The corrugated ring is installed in the receiving groove 532. The winding groove 531 and the receiving groove 532 both have a corrugated structure, and the corrugated structures on the receiving groove 532 and the winding groove 531 have a phase difference.

[0081] In this embodiment, there are multiple support members 530, and the multiple support members 530 are arranged along the circumference of the main structure 510 to form a nearly tubular structure. Two adjacent support members 530 can be in contact with each other or spaced apart. The connecting wire is wound around the winding groove 531, and the corrugated ring is installed in the receiving groove 532. The corrugated structures on the receiving groove 532 and the winding groove 531 have a phase difference, which means that the winding groove 531 includes a first crest and a first trough, and the receiving groove 532 includes a second crest and a second trough, and the first crest and the second crest are separated by a distance d. In other embodiments, the first crest and the second trough are arranged relative to each other, and the first trough and the second crest are arranged relative to each other. In this way, the supporting member 530 is provided with a receiving groove 532, so that the corrugated ring can be installed in the receiving groove 532. The winding groove 531 and the receiving groove 532 are corrugated in structure, and the waveforms of the winding groove 531 and the receiving groove 532 are in opposite phases, so that the contours of the inner connecting layer and the corrugated ring will not completely overlap. In this way, after the inner connecting layer and the outer connecting layer are bonded, the inner connecting layer and the outer connecting layer can form connecting nodes on both sides of the corrugated ring, thereby making the connection between the inner connecting layer, the outer connecting layer and the corrugated ring more stable, and reducing the possibility of the inner connecting layer and the outer connecting layer falling off from the corrugated ring.

[0082] Furthermore, to facilitate the winding of the outer connecting wire, this embodiment further specifies that the depth of the winding groove 531 is greater than the depth of the receiving groove 532. It should be noted that the depth of the winding groove 531 refers to the depth of the winding groove 531 in the radial direction of the main structure 510, while the depth of the receiving groove 532 refers to the depth of the receiving groove 532 in the radial direction of the main structure 510. It is worth explaining that after the corrugated ring is installed in the receiving groove 532, the outer surface of the corrugated ring is likely to be located outside the winding groove 531, interfering with the winding of the outer connecting wire and causing the winding of the outer connecting wire to fail. Thus, by setting the depth of the winding groove 531 greater than the depth of the receiving groove 532, after the corrugated ring is installed in the receiving groove 532, the outer surface of the corrugated ring is located inside the winding groove 531, thereby avoiding interference with the winding of the outer connecting wire after the corrugated ring is installed.

[0083] Furthermore, in order to reduce the pulling of the winding groove 531 on the inner connection layer during the demoulding process, Figure 18 、 Figure 19 As shown, at least one side wall of the receiving groove 532 and / or the winding groove 531 includes a guide surface structure 533, which is an arc-shaped or inclined surface. Therefore, during the removal of the inner connecting layer, the provision of the guide surface structure 533 on at least one side wall of the winding groove 531 and / or the receiving groove 532 allows the inner connecting layer and the corrugated ring to be removed along the guide surface structure 533, thereby preventing the winding groove 531 from pulling on the inner connecting layer and causing deformation of the inner connecting layer, thereby reducing the pulling effect of the main structure 510 on the inner connecting layer during the demolding process.

[0084] In other embodiments, an anti-sticking layer is provided on the inner wall of the winding groove 531. The anti-sticking layer can be either tin foil or aluminum foil. The provision of the anti-sticking layer can reduce the adhesion between the inner connecting layer and the winding groove 531, thereby reducing the difficulty of the winding groove 531 slipping off.

[0085] In one embodiment, when it is necessary to wind the connecting wire in the winding groove 531 or install the corrugated ring in the accommodating groove 532, the telescopic mechanism 520 drives the support member 530 to move in the first direction f3, so that the support member 530 is in the first position, thereby realizing the installation of the inner connecting layer, the corrugated ring or the outer connecting layer; when the inner connecting layer, the corrugated ring and the outer connecting layer are bonded to form the tubular main body 910, the telescopic mechanism 520 drives the support member 530 to move in the opposite direction of the first direction, so that the tubular main body 910 falls off by itself.

[0086] The advantage of this arrangement is that, by providing a winding groove 531 on the support member 530, the connecting wire can be wound on the winding groove 531 to form an inner connecting layer. When the inner connecting layer, the outer connecting layer and the corrugated ring are bonded to form a tubular body, the telescopic mechanism 520 is connected to the support member 530, so that the telescopic mechanism 520 can drive the support member 530 to reciprocate along the first direction, thereby causing the tubular body 910 to fall off by itself, avoiding the winding groove 531 pulling the inner connecting layer or the accommodating groove 532 pulling the corrugated ring to cause deformation of the bracket.

[0087] like Figures 16 to 18 As shown, in order to facilitate the staff to simultaneously control the positions of all support members 530, this embodiment further defines that the telescopic mechanism 520 includes a movable rod 521 and a connecting rod 522, the movable rod 521 is passed through the main structure 510 and can move along the second direction f4, and the two ends of the connecting rod 522 are respectively rotatably connected to the movable rod 521 and the support member 530, wherein the second direction f4 is perpendicular to the first direction f3.

[0088] In this embodiment, a through hole is defined at one axial end of the main structure 510. The through hole extends through the main structure 510 along a second direction f4, where the second direction f4 refers to the axial direction of the main structure 510. A movable rod 521 is disposed within the through hole. Both ends of the movable rod 521 may extend from either axial end of the main structure 510 or only partially reside within the main structure 510. The movable rod 521 is slidable within the through hole, with the outer wall of the movable rod 521 abutting against the inner wall of the through hole.

[0089] A first connecting hole is defined in the connecting rod 522, and a second connecting hole is defined in the movable rod 521. A pin is inserted through the first and second connecting holes to achieve a rotational connection between the connecting rod 522 and the movable rod 521. A third connecting hole is also defined in the connecting rod 522, and a fourth connecting hole is defined in the support member 530. A pin is inserted through the third and fourth connecting holes to achieve a rotational connection between the connecting rod 522 and the support member 530. In other embodiments, the connecting rod 522 can also be rotationally connected to the movable rod 521 via a connecting member.

[0090] In one embodiment, Figure 16 、 Figure 17As shown, when the support member 530 is in the first position, the movable rod 521 is approximately perpendicular to the connecting rod 522. When the support member 530 is in the second position, the movable rod 521 is tilted relative to the connecting rod 522. During the movement of the support member 530 from the first position to the second position, the staff member drives the movable rod 521 to move in the second direction, and the movable rod 521 changes from being perpendicular to the connecting rod 522 to being tilted relative to the connecting rod 522. At this time, the vertical distance between the end of the connecting rod 522 near the support member 530 and the movable rod 521 decreases, thereby achieving the driving of the support member 530 from the first position to the second position. During the movement of the support member 530 from the second position to the first position, the staff member drives the movable rod 521 to move in the opposite direction of the second direction, and the movable rod 521 changes from being tilted relative to the connecting rod 522 to being perpendicular to the connecting rod 522. At this time, the vertical distance between the end of the connecting rod 522 near the support member 530 and the movable rod 521 increases, thereby achieving the driving of the support member 530 from the second position to the first position.

[0091] The advantage of this arrangement is that, through the movable rod 521 passing through the main structure 510, the two ends of the connecting rod 522 are rotatably connected to the movable rod 521 and the support member 530 respectively. The staff can control the position of all the support members 530 relative to the main structure 510 by pulling the movable rod 521. On the one hand, it reduces the difficulty for the staff to control the position of the support member 530. On the other hand, it avoids the need for the staff to manually press the support member 530 and interfere with the falling off of the tubular body 910, thereby improving the manufacturing efficiency of the bracket.

[0092] In this embodiment, if Figure 18 As shown, there are multiple connecting rods 522, and the multiple connecting rods 522 are arranged along the circumference of the movable rod 521. Each connecting rod 522 is connected to at least one support member 530. Therefore, when the movable rod 521 moves axially along the main structure 510, the movable rod 521 drives all the connecting rods 522 to move synchronously, and all the movable rods 521 drive all the support members 530 to move synchronously, thereby enabling the staff to control the positions of all the support members 530. When the tubular body 910 needs to be removed, the staff can control all the support members 530 to move toward the side close to the main structure 510, so that the tubular body 910 can fall off as a whole.

[0093] Further, if Figure 20As shown, the angle θ between different connecting rods 522 and the movable rod 521 increases successively along the axial direction of the main structure 510. It is worth explaining that in this embodiment, multiple circles of connecting rods 522 are arranged at equal intervals along the axial direction of the movable rod 521, and each connecting rod 522 located on the same circle has the same length. The angle θ between the connecting rods 522 located on different circles and the movable rod 521 increases successively along the axial direction of the main structure 510. For example, the connecting rods 522 include a first connecting rod 5221 and a second connecting rod 5222. A first radial plane and a second radial plane are arranged along the axial direction of the movable rod 521. The multiple first connecting rods 5221 are arranged along the circumference of the movable rod 521 and are located on the first radial plane. The multiple second connecting rods 5222 are arranged along the circumference of the movable rod 521 and are located on the second radial plane. The angle between the first connecting rod 5221 and the movable rod 5221 is greater than the angle between the second connecting rod 5222 and the movable rod 5221.

[0094] It is worth explaining that, assuming the axial direction of the movable rod 521 is the x-axis and the first direction f3 is the y-axis, the motion trajectory of the connection point between the movable rod 521 and the support member 530 is: y = Asin(θ), where A is the length of the connecting rod 522, and θ is the angle between the movable rod 521 and the connecting rod 522. In this embodiment, assuming the angle between the first connecting rod 5221 and the movable rod 521 is θ, and the angle between the second connecting rod 5222 and the movable rod 522 is θ+δ, the amount of movement of the support member 530 on the y-axis driven by the first connecting rod 5221 is: y1 = Asin(θ); the amount of movement of the support member 530 on the y-axis driven by the second connecting rod 5222 is: y2 = Asin(θ+δ). Wherein, 0 < δ < π / 2, 0 < θ < π / 2-δ.

[0095] The increment of the movement of the support member 530 driven by the connecting rod 522 is related to the slope of the movement trajectory of the connection point between the movable rod 521 and the support member 530 . At this time, the increment of the movement of the support member 530 driven by the first connecting rod 5221 is Δy1={Asin(Δθ)}'=cos(Δθ); the increment of the movement of the support member 530 driven by the second connecting rod 5222 is Δy2={Asin(Δθ+δ)}'=cos(Δθ+δ); when 0<δ<π / 2, cos(Δθ)>cos(Δθ+δ), it can be seen that Δy1>Δy2, that is, the increment of the movement of the support member 530 driven by the first connecting rod 5221 is greater than the increment of the movement of the support member 530 driven by the second connecting rod 5222. Therefore, when the movable rod 521 drives the first connecting rod 5221 and the second connecting rod 5222 to move the same distance, the movement distance of the support member 530 connected to the first connecting rod 5221 is greater than the movement distance of the support member 530 connected to the second connecting rod 5222, so that the movable rod 521 can drive the movement distance of different supports 530 in the axial direction to decrease step by step.

[0096] For example, in one embodiment, Figure 21 As shown (the dotted part in the figure is a schematic diagram when the support member 530 is in the second position, and the solid part is a structural schematic diagram when the support member 530 is in the first position), in the first position, the angle between the first connecting rod 5221 and the movable rod 521 is smaller, and the angle between the second connecting rod 5222 and the movable rod 521 is larger, and the length of the first connecting rod 5221 is the same as the length of the second connecting rod 5222. In this way, when the movable rod 521 moves the same distance, the distance d1 that the first connecting rod 5221 drives the support member 530 to move is greater than the distance d2 that the second connecting rod 5222 drives the support member 530 to move, so that the different support members 530 arranged along the axial direction of the movable rod 521 can be retracted step by step.

[0097] Therefore, during the demolding process of the main structure 510, the angle θ between different connecting rods 522 and the movable rod 521 increases successively along the axial direction of the main structure 510, so that the staff can drive all the connecting rods 522 to move through the movable rod 521. At the same time, different support members 530 in the axial direction of the movable rod 521 can be retracted step by step, thereby realizing the step-by-step detachment of the tubular main body 910. Therefore, when the inner connecting layer adheres to the winding groove, the movement amplitude of the support member 530 of the next level will not be too large to form traction on the inner connecting layer, thereby improving the fault tolerance rate in the stent manufacturing process.

[0098] Furthermore, in order to ensure that when all the support members 530 are in the first position, the distances between the end faces of different support members 530 away from the main structure 510 and the main structure 510 are equal.

[0099] like Figure 20 As shown, the support member 530 includes a first support member 531 and a second support member 532. The first support member 531 and the second support member 532 are arranged along the axial direction of the movable rod 521. The length of the first support member 531 is greater than the length of the second support member 532. The first support member 531 is connected to the first connecting rod 5221, and the second support member 531 is connected to the second connecting rod 5221.

[0100] It is worth explaining that since the angle between the first connecting rod 5221 and the movable rod 521 is small, the distance between the end of the first connecting rod 5221 connected to the first support member 531 and the movable rod 521 is small. Similarly, the angle between the second connecting rod 5222 and the movable rod 521 is large, so the distance between the end of the second connecting rod 5222 connected to the second support member 532 and the movable rod 521 is large.

[0101] Therefore, when the angles between different connecting rods 522 and the movable rod 521 increase successively along the axial direction of the main structure, when the support member 530 is in the first position, the different support members 530 are arranged in a step-by-step manner along the axial direction of the movable rod 521, so that the distances between different support members 530 in the axial direction of the movable rod 521 and the end face of the main structure 510 are equal, thereby avoiding deformation of the bracket and failure of the bracket manufacturing due to the different distances between the support members 530 and the end face of the main structure 510.

[0102] Furthermore, in the process of the staff pulling the movable rod 521, in order to prevent the support member 530 from moving in the second direction and causing the support member 530 to fail to move in the first direction, as shown in FIG. Figure 18 As shown, a limiting hole 511 is opened on the side wall of the main structure 510, and the limiting hole 511 is arranged along the first direction. The support member 530 includes a sliding portion 533, and the sliding portion 533 is passed through the limiting hole 511, and the sliding portion 533 is connected to the telescopic mechanism 520.

[0103] It should be noted that there can be multiple limiting holes 511, and the multiple limiting holes 511 are arranged along the circumference of the main structure 510. The openings of the limiting holes 511 are arranged in the first direction. In the cross section of the main structure 510, the multiple limiting holes 511 are radial. In this embodiment, the first direction refers to the radial direction of the main structure 510. The sliding portion 533 is inserted into the limiting hole 511. One end of the sliding portion 533 passes through the limiting hole 511 and is connected to the connecting rod 522. The side wall of the sliding portion 533 is in contact with the inner wall of the limiting hole 511. The connecting rod 522 drives the sliding portion 533 to slide within the limiting hole 511 to achieve movement of the support member 530 in the first direction.

[0104] Therefore, by opening a limiting hole 511 on the side wall of the main structure 510, the sliding part 533 is inserted into the limiting hole 511, so that the limiting hole 511 can limit the sliding part 533 to move in the first direction. In this way, when the staff pulls the movable rod 521, it can be ensured that the support member 530 can only move in the first direction, avoiding the support member 530 following the movable rod 521 to move in the second direction, causing the movement of the support member 530 in the first direction to fail.

[0105] Furthermore, in order to achieve the positioning of the movable rod, as Figure 22 As shown, the bracket manufacturing tool further includes a locking mechanism, which is installed on the movable rod 521 and is used to lock or release the movable rod 521.

[0106] The locking mechanism includes a first state in which the movable rod 521 is locked and a second state in which the movable rod 521 is released. When the support member 530 needs to be fixed in the first position or the second position, the locking mechanism is in the first state to lock the movable rod 521. In this way, the locking mechanism can limit the movement of the movable rod 521 in the second direction, thereby fixing the support member 530 in the first position or the second position. When the support member 530 needs to move from the first position to the second position or from the second position to the first position, the locking mechanism is in the second state in which the locking mechanism releases the movable rod 521, allowing the movable rod 521 to move in the second direction, thereby driving the movement of the support member 530.

[0107] In this embodiment, if Figure 22 As shown, the locking mechanism includes at least two fasteners 541, each having a threaded hole formed therein and an external thread formed on the side wall of the movable rod 521. The fasteners 541 are threadedly connected to the movable rod 521. When the support member 530 needs to be fixed in the first position or the second position, the fasteners 541 are rotated along the circumference of the movable rod 521 to move the fasteners 541 toward the axial end face of the main structure 510, thereby abutting the axial ends of the fasteners 541 against the main structure 510, restricting the movement of the movable rod 521 in the second direction, thereby achieving the fixation of the support member 530 in the first position or the second position. When the support member 530 needs to be moved from the first position to the second position, or from the second position to the first position, the fasteners 541 can be rotated to move the fasteners 541 away from the axial end face of the main structure 510, thereby creating a spacing between the fasteners 541 and the axial end face of the main structure 510, thereby freeing up space for the movable rod 521 to move.

[0108] In other embodiments, the locking mechanism includes a positioning member, a first positioning hole is provided on the side wall of the main structure 510, and a second positioning hole and a third positioning hole are provided on the movable rod 521. When the support member 530 is in the first position, the positions of the first positioning hole and the second positioning hole correspond to each other, and the positioning member is passed through the first positioning hole and the second positioning hole to realize the positioning of the movable rod 521 in the first position; when the support member 530 is in the second position, the first positioning hole and the third positioning hole correspond to each other, and the positioning member is inserted into the first positioning hole and the third positioning hole to realize the positioning of the movable rod 521.

[0109] Therefore, in the process of winding the inner connecting layer and the corrugated ring, the movable rod 521 is locked by using the locking mechanism, thereby realizing the positioning of the support member 530. Furthermore, when the support member 530 is subjected to the radial contraction force of the corrugated ring, the support member 530 can always be located in the first position, avoiding the movement of the support member 530 and causing deformation of the stent during the heat treatment process, thereby causing the stent manufacturing to fail.

[0110] Example 4

[0111] This embodiment provides a method for manufacturing a stent. Figure 23 As shown, manufacturing a stent using the stent manufacturing tool as described above includes the following steps:

[0112] S1, winding the connecting wire on the support member 320 to obtain an inner connecting layer;

[0113] S2, mounting the corrugated ring on the support 320, and winding another connecting wire around the corrugated ring to obtain an outer connecting layer;

[0114] S3, heat treatment to bond the outer connecting layer, the outer connecting layer and the corrugated ring to obtain a tubular body 910;

[0115] S4, sliding the support member 320 toward the first direction f3 to make the tubular body 910 fall off.

[0116] In S1, the support member is in the first position, tin foil is laid on the inner wall of the winding groove, and the connecting wire is wound in the winding groove along the contour of the winding groove. The connecting wire can be any one of PTFE wire, PP wire or PET wire, and the connecting wires are intersected to obtain an inner connecting layer.

[0117] In S2, the support member is in the first position, the corrugated ring is placed on the main structure, and the corrugated ring is fitted with the mounting portion, and the connecting wire is wound along the contour of the winding groove to form an outer connecting layer on the outer side of the corrugated ring.

[0118] In S3, a heat shrink tube is sleeved on the outside of the outer connecting layer. The heat shrink tube can be at least one of FEP heat shrink tube, PTFE heat shrink tube, and PFA heat shrink tube. The main structure is heated to shrink the heat shrink tube so as to bond the inner connecting layer and the outer connecting layer to each other, thereby bonding the inner connecting layer, the outer connecting layer and the corrugated ring to form a tubular main body 910.

[0119] In S4, after the main structure cools, the support member moves in the opposite direction of the first direction f3 to the second position, and the tubular body 910 is removed from the mold. The coating 920 is then disposed on the outer or inner sidewall of the tubular body 910 along the circumference of the tubular body 910. The coating 920 is then sutured to the tubular body 910 at both axial ends using sutures to obtain the stent. In other embodiments, the coating 920 may also be sutured to the tubular body 910 along the axial direction of the tubular body.

[0120] In this way, before adjusting the position of the support member 320, the corrugated ring, the inner connecting layer and the outer connecting layer are heat treated, so that the support member 320 can form radial pressure on the inner connecting layer and the outer connecting layer, ensuring that the inner connecting layer and the outer connecting layer are shaped during the heat treatment process. After the heat setting treatment is completed, the position of the support member 320 is used to loosen the tubular body 910, so that the tubular body 910 falls off by itself, avoiding the main structure 210 pulling on the inner connecting layer to cause deformation of the tubular body 910, thereby increasing the manufacturing efficiency of the stent.

[0121] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A stent manufacturing tool, characterized in that: The support member comprises a main structure and a support member, the support member is installed on the main structure, the support member is at least partially located on the outside of the main structure and can move relative to the main structure, a guide hole is provided on the circumferential side wall of the main structure, and the guide hole is provided through the inner and outer surfaces of the circumferential side wall of the main structure, the guide hole is arranged along a first direction, the first direction is perpendicular to the axial direction of the main structure, and the support member is slidably connected to the guide hole; the bracket manufacturing tool also includes a limit member, at least two limit holes arranged at intervals are provided on the support member, and the limit member can be inserted into one of the limit holes; the support member comprises a sliding portion, a positioning portion and a mounting portion connected in sequence, the mounting portion is located at an end of the support member away from the main structure, and a winding groove and a accommodating groove are provided on the mounting portion; a plurality of support members arranged along the circumference of the main structure are provided in the axial direction of the main structure, and the plurality of support members on the same circle are arranged at equal intervals or at unequal intervals; The connecting wire is wound on the winding groove to form an inner connecting layer and an outer connecting layer, and the corrugated ring is installed in the accommodating groove. When the inner connecting layer, the outer connecting layer and the corrugated ring are bonded to form a tubular body, the support member moves relative to the main structure to cause the tubular body to fall off from the support member by itself.

2. The stent manufacturing tool according to claim 1, characterized in that The support member includes a first positioning block and a second positioning block, the first positioning block is located on the outside of the main structure, and the second positioning block is located on the inside of the main structure. The spacing distance between the first positioning block and the second positioning block is equal to the spacing distance between two adjacent limiting holes on the support member.

3. The stent manufacturing tool according to claim 1, wherein: The sliding portion is located on the inner side of the main structure, and the sliding portions on different supporting members are arranged in sequence along the axial direction of the main structure.

4. The stent manufacturing tool according to claim 3, characterized in that The positioning portion is connected to an end of the sliding portion away from the center of the main structure, and the diameter of the positioning portion is greater than the diameter of the sliding portion.

5. The stent manufacturing tool according to claim 3, characterized in that The stent manufacturing tool further includes a supporting member, which is located on the inner side of the main structure and arranged along the radial direction of the main structure. The supporting member is used to support the sliding part.

6. The stent manufacturing tool according to claim 1, wherein: At least one side wall of the accommodating groove includes a guide surface structure, and the guide surface structure is an arc surface or an inclined surface.

7. A method for manufacturing a stent, comprising manufacturing a stent using the stent manufacturing tool according to any one of claims 1 to 6, wherein the stent comprises a corrugated ring, characterized in that: include: Winding the connecting wire on the support to obtain an inner connecting layer; Mount the corrugated ring on a support, and wind another connecting wire around the corrugated ring to obtain an outer connecting layer; Heat treatment is performed to bond the connecting layer, the outer connecting layer and the corrugated ring to obtain a tubular body; The supporting member is made to slide toward the first direction to cause the tubular body to fall off.

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