CN116327460A

CN116327460A - Support and support braiding method

Info

Publication number: CN116327460A
Application number: CN202111604877.8A
Authority: CN
Inventors: 张向阳; 耿冉; 王佳波; 傅振中
Original assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Current assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-06-27
Also published as: WO2023116009A1

Abstract

The invention relates to a bracket and a bracket braiding method, wherein the braiding method adopts a cylindrical clamp which is uniformly divided into a plurality of rows along the axial direction and a plurality of columns along the circumferential direction, each row is intersected with each column to form an intersection, and a locating pin for wire winding is arranged at least at part of the intersection; the braiding method comprises the following steps: the intersection provided with the locating pin is called a braiding position, one braiding position is taken as a starting point, the wire rod is bent and moved up and down between two rows of the wire rod in a V shape until the wire rod is braided to form a bracket with required length, and the wire rod passes through all the intersections; wherein all inflection points of the V shape are positioned at the braiding positions and are wound around the locating pins; if one locating pin is provided with two reverse V-shaped pins, the two reverse V-shaped pins are hooked with each other; in the braiding process, wires are interwoven up and down between braided paths. The support has the advantages of easy assembly, small shrinkage and good flexibility.

Description

Support and support braiding method

Technical Field

The invention relates to the technical field of medical equipment, in particular to a bracket and a bracket braiding method.

Background

Woven stents are commonly available in the market in two categories, the Cross type and the Hook type.

The bracket with the Cross structure is formed by winding and weaving wires along the circumferential direction of a die, when the wires reach the top end of the bracket, the wires are bent in the opposite direction at a certain angle, and the wire paths between the two ends of the bracket are not bent in the opposite direction. The Cross-shaped stent has the advantages of easy assembly, but large shrinkage (the length of the stent is obviously reduced after the stent is released from a sheath tube to expand), and poor flexibility (the larger the external force required for bending the stent is, the worse the flexibility of the stent is, and the stent cannot adapt to bending of different degrees of intestinal tracts).

The bracket with the Hook-type structure is wound from one end of the bracket to the other end in a repeated bending mode, and the bracket is connected together through a V-shaped structure formed by bending. The Hook-type stent has the disadvantage of not being easy to assemble (because overlapping parts exist at the positions where the stent wires of the Hook-type structure are buckled, so that the outer diameter of the stent is increased, the stent is not easy to assemble when being placed into a conveyor, the stent is not easy to assemble), but has the advantages of small shrinkage (the length of the stent is not obviously reduced after being released from a sheath tube to expand), and good flexibility (the smaller the force required for bending the stent is, the better the flexibility is to adapt to bending of intestinal tracts with different degrees).

If the assembly is not easy, the difficulty of assembling the bracket into the conveyor is increased, and the operation is not easy; the high shrinkage rate easily causes difficult accurate positioning in the operation, increases the difficulty of the operation, and simultaneously, if the positioning is improper, the stent is easy to shift and block, and a series of complications are brought; a stent with insufficient flexibility cannot adapt to intestinal environments with different degrees of bending, and is easy to cause damage to intestinal walls or cause intestinal obstruction.

Therefore, developing a stent that is easy to assemble, has a small shrinkage and is flexible is a problem to be studied at present.

Disclosure of Invention

In view of the above, it is desirable to provide a stent and a stent braiding method that can be easily assembled, have a small shrinkage and are excellent in flexibility.

A method for braiding a stent, the braiding method adopts a cylindrical clamp which is uniformly divided into a plurality of rows along an axial direction and a plurality of columns along a circumferential direction, each row and each column are intersected to form an intersection, and a locating pin for winding a wire is arranged at least at part of the intersection; the braiding method comprises the following steps:

the intersection provided with the locating pin is called a braiding position, one braiding position is taken as a starting point, the wire rod is bent up and down between two rows of the wire rod in a V shape until the wire rod is braided to form a bracket with required length, and the wire rod passes through all the intersection;

wherein all inflection points of the V shape are positioned at the braiding positions and are wound around the locating pins; if one locating pin is provided with two reverse V-shaped pins, the two reverse V-shaped pins are hooked with each other;

in the braiding process, the wires are interwoven up and down between the braided paths.

In one embodiment, starting from the first row of all rows, dividing all rows into a plurality of S periods arranged in sequence, wherein the last row of one S period is taken as the first row of the next S period; meanwhile, starting from the first row of all rows, dividing all rows into a plurality of M periods which are arranged in sequence, wherein the last row of one M period is used as the first row of the next M period; the wires include a first wire and a second wire;

the braiding method comprises the following steps:

taking one braiding position as a braiding starting point of the first wire, enabling the first wire to bend and move up and down in a first V shape between a first row and a last row of each S period, and finally passing through half of all the intersections;

taking the other braiding position as a starting point of braiding of the second wire rod, enabling the second wire rod to bend and move up and down between the first row and the last row of each M period in a second V shape, and finally passing through the rest half of all the intersections;

wherein one of said S periods comprises n+1 rows and one of said M periods comprises m+1 rows; the first chevron spans 2n+1 of the intersections on the same row, and the second chevron spans 2m+1 of the intersections on the same row; wherein n and m are positive integers, and m < n.

In one embodiment, 2.ltoreq.n.ltoreq.4, 1.ltoreq.m.ltoreq.3.

In one embodiment, the braiding method comprises the steps of: starting from the first row of all rows, dividing all rows into a plurality of periods arranged in sequence, wherein the last row of one period is used as the first row of the next period, and each period is provided with at least 2 rows;

step 110, taking the intersection of the first row and any column as the starting point of the first period, and bending and moving the wire rod up and down in a V shape between the first row and the last row of the first period until the wire rod returns to the starting point of the first period;

step 120, winding the wire from the starting point of the first period to the last row of the first period along half of the first woven V-shape to form a reinforcing rib;

step 130, taking the intersection where the wire is currently located as the starting point of the second period, and repeating the steps 110 and 120 until the wire is braided to obtain the stent with the required length.

Step 210, taking any intersection on the first row of the initial period as the starting point of the initial period, and enabling the wire rod to bend and move up and down between the first row and the last row of the initial period in a V shape until the wire rod moves to the first end point of the initial period; the first end point is a position which is routed before the wire returns to the starting point of the current period and is positioned at the intersection of the last row of the current period and the starting point of the current period, wherein the intersection belongs to the same V shape; the initial period is any period;

step 220, repeating step 210 by taking the intersection where the wire is currently located as the starting point of the next period until the wire moves to the end point I of the last period;

step 230, making the wire rod pass through the end point first of each previous period from the end point first of the last period in turn until the wire rod returns to the end point first of the initial period;

step 240, moving the wire directly to the beginning of the start cycle.

In one embodiment, the initial cycle is a first cycle and the wire braid results in a stent that reaches a desired length at the end of step 240.

In one embodiment, the initial period is a second period; the braiding method further comprises the following steps:

And 250, taking the starting point of the initial period as the starting point of the first period, bending and moving the wire rod up and down in a V shape between the first row and the last row of the first period until the wire rod returns to the starting point of the first period, and weaving the wire rod to obtain the bracket with the required length.

In one embodiment, the initial period is any period from the third period to the third last period; the braiding method further comprises the following steps:

step 261, taking the starting point of the starting period as the starting point of the previous period of the starting period, and enabling the wire rod to bend and move up and down between the first row and the last row of the previous period in a V shape until the wire rod moves to a second end point of the previous period; the second end point is a crossing point which is passed before the wire returns to the starting point of the current period and is positioned on the first row of the current period and belongs to the same V shape with the starting point of the current period;

step 262, repeating step 261 with the intersection where the wire is currently located as the start point of the previous cycle until the wire moves to the end point two of the first cycle;

Step 263, making the wire rod pass through the second end of each subsequent period from the second end of the first period in turn until the wire rod returns to the second end of the last period of the initial period;

step 264, moving the wire directly to the start of the cycle immediately preceding the start cycle.

step 310, taking any intersection in the initial period as the starting point of the initial period, and enabling the wire rod to bend and move up and down between the first row and the last row of the initial period in a V shape until the wire rod moves to the end point III of the initial period; the third end point is that the wire is routed before returning to the starting point of the current period and is positioned at the intersection part of the last row of the current period, which belongs to different V-shapes with the starting point of the current period; the initial period is any period;

step 320, repeating step 310 by taking the intersection where the wire is currently located as the starting point of the next period until the wire moves to the end point III on the last row of the penultimate period;

Step 330, taking the intersection where the wire is currently located as the starting point of the last period, and bending and moving the wire up and down in a V shape between the first row and the last row of the last period until the wire returns to the starting point of the last period;

step 340, taking the intersection where the wire is currently located as a return start point of the penultimate period, and enabling the wire to bend and move up and down in a V shape between the first row and the last row of the penultimate period until the wire returns to the start point of the penultimate period;

step 350, taking the intersection where the wire is currently located as the return start point of the third last period, and repeating step 340 until the wire moves to the start point of the initial period.

In one embodiment, the initial cycle is a first cycle and the wire braid results in a stent that reaches a desired length at the end of step 350.

and 360, taking the starting point of the initial period as the starting point of the first period, bending and moving the wire rod up and down in a V shape between the first row and the last row of the first period until the wire rod returns to the starting point of the first period, and weaving the wire rod to obtain the bracket with the required length.

step 371, using the starting point of the starting period as the starting point of the previous period of the starting period, and bending and moving the wire up and down in a V shape between the first row and the last row of the previous period until the wire moves to the end point four of the previous period; the end point IV is a position which is routed before the wire returns to the starting point of the current period and is positioned at the intersection part of the first row of the current period, which belongs to different V shapes with the starting point of the current period;

step 372, repeating step 371 by taking the intersection where the wire is currently located as the starting point of the previous cycle until the wire moves to an intersection on the first row of the second cycle;

step 373, using the intersection where the wire is currently located as the starting point of the first period, and bending and moving the wire up and down in a V-shape between the first row and the last row of the first period until the wire returns to the starting point of the first period; the wire is woven to obtain a bracket with the required length;

374, taking the intersection where the wire is currently located as a return start point of a second period, and enabling the wire to bend and move up and down in a V shape between a first row and a last row of the second period until the wire returns to the start point of the second period;

step 375, repeating step 374 with the intersection where the wire is currently located as the return start of the third cycle until the wire moves to the start of the start cycle;

if the initial period is the third period, knitting is ended in step 374; if the start cycle is any cycle between the fourth cycle and the third last cycle, then knitting ends at step 375.

step 271, using the intersection of the start points of the start periods as the start point of the previous period, so that the wire rod moves in a V-shape in a bending manner up and down between the first row and the last row of the previous period until the wire rod moves to the end point four of the previous period; the end point IV is a position which is routed before the wire returns to the starting point of the current period and is positioned at the intersection part of the first row of the current period, which belongs to different V shapes with the starting point of the current period;

Step 272, repeating step 371 with the intersection where the wire is currently located as the start point of the previous cycle until the wire moves to an intersection on the first row of the second cycle;

273, taking the intersection where the wire is currently located as the starting point of a first period, and enabling the wire to bend and move up and down in a V shape between a first row and a last row of the first period until the wire returns to the starting point of the first period; the wire is woven to obtain a bracket with the required length;

274, taking the intersection where the wire is currently located as a return start point of the second period, and enabling the wire to bend and move up and down in a V shape between the first row and the last row of the second period until the wire returns to the start point of the second period;

step 275, repeating step 274 with the intersection where the wire is currently located as the return start point of the third cycle until the wire moves to the start point of the start cycle;

wherein if the start cycle is a third cycle, knitting is ended at step 274; if the start cycle is any cycle between the fourth cycle and the third last cycle, knitting is ended at step 275.

step 381, using the starting point of the starting period as the starting point of the previous period of the starting period, so that the wire rod moves in a V-shape in a bending manner up and down between the first row and the last row of the previous period until the wire rod moves to the second end point of the previous period; the second end point is a crossing point which is passed before the wire returns to the starting point of the current period and is positioned on the first row of the current period and belongs to the same V shape with the starting point of the current period;

step 382, repeating step 261 with the intersection where the wire is currently located as the start point of the previous cycle until the wire moves to the end point two of the first cycle;

step 383, enabling the wire rod to sequentially pass through the second end point of each subsequent cycle from the second end point of the first cycle until the wire rod returns to the second end point of the previous cycle of the initial cycle;

step 384, moving the wire directly to the start of the cycle immediately preceding the start cycle.

A bracket is woven by adopting the weaving method.

The bracket and the bracket braiding method have at least the following advantages:

the wire is bent and moved up and down between two rows of intersecting positions in a V shape until a bracket with the required length is formed by braiding, the wire passes through all the intersecting positions, and the inflection point of the V shape is positioned at a braiding position and winds a locating pin of the braiding position; if one locating pin is provided with two reverse V-shaped pins, the two reverse V-shaped pins are hooked with each other; in the braiding process, the wires are interwoven up and down among the braided paths to obtain the bracket with a plurality of diamond grids, and the bracket adopts a specific braiding method to better combine the hooking structure and the interweaving structure, so that the bracket has the advantages of easy assembly, small shrinkage and good flexibility.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 to 5 are schematic diagrams of a knitting process of a first wire in the first embodiment or the second embodiment or the third embodiment;

fig. 6 to 9 are schematic views of a knitting process of the second wire in the first embodiment;

fig. 10 to 15 are schematic views of a knitting process of a second wire in the second embodiment;

fig. 16 to 21 are schematic views of a knitting process of a second wire in the third embodiment;

fig. 22 to 26 are schematic diagrams showing a knitting process of the first wire material in the fourth embodiment or the fifth embodiment;

fig. 27 to 30 are schematic views of a knitting process of a second wire in a fourth embodiment;

fig. 31 to 34 are schematic views of a knitting process of a second wire in a fifth embodiment;

FIG. 35 is a partial schematic view of a stent in an embodiment;

fig. 36 is a schematic view of a hooking structure in an embodiment;

FIG. 37 is a schematic diagram of an up-down interleaving structure in an embodiment;

fig. 38 is a schematic view of a reinforcing bar at a hooking structure in an embodiment;

fig. 39 is a schematic diagram of a reinforcing rib with an upper and lower interweaving structure in an embodiment.

Reference numerals illustrate:

10. a first wire; 110. a first reinforcing rib; 20. a second wire; 210. a second reinforcing rib; 30. a grid; 310. an upper vertex; 320. a lower vertex; 100. and (5) positioning pins.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

The embodiment of the application provides a bracket braiding method, which adopts a cylindrical clamp. The cylindrical clamp is uniformly divided into a plurality of rows along the axial direction and a plurality of columns along the circumferential direction, each row is intersected with each column to form an intersection, and a locating pin for winding a wire is arranged at least at part of the intersection.

The braiding method comprises the following steps: the intersection provided with the locating pin is called a braiding position, one braiding position is taken as a starting point, the wire rod is bent up and down between two rows of the wire rod in a V shape until the wire rod is braided to form a bracket with required length, and the wire rod passes through all the intersection; wherein all inflection points of the V shape are positioned at the braiding positions and are wound around the locating pins; if one of the positioning pins has two reverse V-shapes, the two reverse V-shapes are hooked with each other (as shown in FIG. 36); during braiding, the wires are interwoven up and down between braided paths (see fig. 37).

Referring to fig. 35, the braided path of the wire forms a stent having a plurality of diamond grids 30. Referring to fig. 36 and 37, one of the upper vertices 310 and the lower vertices 320 of the diamond grid 30 on a part of rows is a hook structure, and the other is an up-down interweaving structure. The dashed lines L1, L2, L3, and L4 shown in fig. 35 respectively pass through a row of diamond grids 30, wherein in the diamond grids 30 of the row where L1 and L4 are located, part or all of the upper vertices 310 and the lower vertices 320 of the grid 30 have a hook structure, and the other has an up-down interweaving structure. In the diamond-shaped mesh 30 of the column where L2 is located, all the upper vertices 310 and the lower vertices 320 of the mesh 30 are hook structures. In the diamond-shaped mesh 30 of the column where L3 is located, the upper vertices 310 and the lower vertices 320 of all the meshes 30 are in an up-down interweaving structure.

By adopting the bracket braiding method, wires are bent and moved up and down between two rows of intersecting positions in a V shape until the wire is braided to form the bracket with the required length, the wires pass through all the intersecting positions, and the inflection point of the V shape is positioned at a braiding position and winds a locating pin of the braiding position; if one locating pin is provided with two reverse V-shaped pins, the two reverse V-shaped pins are hooked with each other; in the braiding process, the wires are interwoven up and down among the braided paths, so that the bracket with a plurality of diamond grids can be obtained, wherein two adjacent diamond grids in the axial direction in part of the bracket are connected by adopting a hooking structure, and the other two adjacent diamond grids are connected by adopting an up-down interweaving structure. Compared with the traditional Cross-type structure or Hook-type structure, the support obtained by the weaving method of the embodiment of the application has the advantages of easy assembly, small shrinkage and good flexibility.

Further, in one embodiment, starting from the first row of all rows, dividing all rows into a plurality of S periods arranged in sequence, wherein the last row of one S period is the first row of the next S period; meanwhile, starting from the first row of all rows, dividing all rows into a plurality of M periods which are arranged in sequence, wherein the last row of one M period is used as the first row of the next M period; the wires include a first wire 10 and a second wire 20. The braiding method comprises the following steps: and taking one braiding position as a braiding starting point of the first wire, enabling the first wire to bend and move up and down in a first V shape between the first row and the last row of each S period, and finally passing through half of all the intersections. And taking the other weaving position as a starting point of the second wire weaving, enabling the second wire to bend and move up and down between the first row and the last row of each M period in a second V shape, and finally passing through the rest half of all the intersections. Wherein one of the S periods includes n+1 rows. One of the M periods includes m+1 rows. The first chevron spans 2n+1 of the intersections on the same row. The second chevron spans 2m+1 of the intersections on the same row. Wherein n and m are positive integers, and m < n. Alternatively, 2.ltoreq.n.ltoreq.4, 1.ltoreq.m.ltoreq.3. The double wires are adopted to weave in V shapes with different sizes, the weaving path of the first wire 10 is a layer of first net with large diamond grids, and the weaving path of the second wire 20 is a layer of second net with small diamond grids. The woven path of the first mesh is interwoven up and down with the woven path of the second mesh to provide a stent having smaller diamond-shaped meshes, wherein the smallest diamond-shaped unit is the diamond-shaped mesh 30 described above.

For clarity of description, reference hereinafter to first and second … … cycles being in a sequential order, such as a first M cycle and a second M cycle, means that the first M cycle is above the second M cycle on the cylindrical clamp. The first and second end points … … are merely for distinguishing between different names, and do not indicate a sequence.

Still further, in one embodiment, the braiding method includes the steps of: starting from the first of all rows, all rows are divided into a plurality of cycles arranged in sequence, the last row of one cycle being the first row of the next cycle. At least 2 rows are arranged in each period;

The support obtained by the braiding method of the embodiment is provided with the reinforcing ribs, and the support can be axially reinforced, so that the axial shortening degree of the support is reduced. Referring to fig. 1-9, using a two-wire braided stent, the first wire 10 braided path results in a first mesh with first reinforcing ribs 110 and the second wire 20 braided path results in a second mesh with second reinforcing ribs 210. The braided wires of the first net are interwoven with the braided wires of the second net up and down to obtain the bracket with two reinforcing ribs.

Still further, in another embodiment, the braiding method includes the steps of: starting from the first row of all rows, dividing all rows into a plurality of periods arranged in sequence, wherein the last row of one period is used as the first row of the next period, and each period is provided with at least 2 rows;

Step 220, repeating step 210 with the intersection where the wire is currently located as the start point of the next cycle (the end point of the previous cycle is the start point of the next cycle), until the wire moves to the end point of the last cycle;

step 240, moving the wire directly to the beginning of the start cycle.

Still further, in the above embodiment, the initial period is the first period, and at the end of step 240, the wire is woven to obtain the stent with the desired length.

Still further, in the above embodiment, the start period is a second period; the braiding method further comprises the following steps:

and 250, taking the intersection where the wire is currently located as the starting point of a first period, bending and moving the wire up and down in a V shape between a first row and a last row of the first period until the wire returns to the starting point of the first period, and weaving the wire to obtain the bracket with the required length.

Still further, in the above embodiment, the start period is any period from the third period to the third last period; the braiding method further comprises the following steps:

Step 261, taking the intersection where the wire is currently located as the starting point of the previous cycle of the starting cycle, and enabling the wire to bend and move up and down between the first row and the last row of the previous cycle in a V shape until the wire moves to the second end point of the previous cycle; the second end point is a crossing point which is passed before the wire returns to the starting point of the current period and is positioned on the first row of the current period and belongs to the same V shape with the starting point of the current period;

Referring to fig. 16-21, the wire in the braiding method of this embodiment starts braiding in V-shape until the last period, then returns to the starting point of the starting period in a manner of up-down interweaving, and according to the difference of the starting periods, decides whether to weave up with the same rule to reach the required length of the stent, there is no reinforcing rib after braiding is completed, the outer diameter of the compressed stent is smaller, the assembly is easy, the flexibility is better, and the braiding process is simpler. With a double-wire woven stent, both the first wire 10 and the second wire 10 can be woven in this manner.

step 271, using the intersection where the wire is currently located as the start point of the previous cycle of the initial cycle, so that the wire moves in a V-shape in a bending manner up and down between the first row and the last row of the previous cycle until the wire moves to the end point four of the previous cycle; the end point IV is a position which is routed before the wire returns to the starting point of the current period and is positioned at the intersection part of the first row of the current period, which belongs to different V shapes with the starting point of the current period;

Referring to fig. 16 to 21, the wire is knitted in a V-shape until the last cycle, then the wire is knitted back to the start of the initial cycle in a vertically interweaving manner, referring to fig. 10 to 15, the wire is knitted in a V-shape back to the start of the last cycle of the initial cycle until the start of the last cycle of the initial cycle reaches the required length of the stent, that is, the wire is knitted in a different rule in the cycle below the initial cycle than in the cycle above the initial cycle, no reinforcing ribs are provided after the completion of the knitting, the outer diameter of the stent after compression is smaller, the stent is easy to assemble, the flexibility is better, and the knitting process is simpler. With a double-wire woven stent, both the first wire 10 and the second wire 20 can be woven in this manner.

Still further, in the above embodiment, the initial period is the first period, and at the end of step 350, the wire is woven to obtain the stent with the desired length.

and 360, taking the intersection where the wire is currently located as the starting point of a first period, bending and moving the wire up and down in a V shape between the first row and the last row of the first period until the wire returns to the starting point of the first period, and weaving the wire to obtain the bracket with the required length.

Step 371, using the intersection of the wire rod at present as the start point of the previous cycle of the initial cycle, so that the wire rod moves in a V-shape in a bending manner up and down between the first row and the last row of the previous cycle until the wire rod moves to the end point four of the previous cycle; the end point IV is a position which is routed before the wire returns to the starting point of the current period and is positioned at the intersection part of the first row of the current period, which belongs to different V shapes with the starting point of the current period;

if the start cycle is the third cycle, knitting is ended in step 374; if the start cycle is any cycle between the fourth cycle and the third last cycle, then knitting ends at step 375.

Referring to fig. 10-15, the wire is woven in a V-shape until the last period, then is woven in a V-shape back stroke until the initial period, and according to the difference of the initial periods, whether the wire is woven in the same rule and up to reach the required length of the stent is determined, no reinforcing ribs are arranged after the weaving is completed, the outer diameter of the compressed stent is smaller, the assembly is easy, the flexibility is better, and the weaving process is simpler and more convenient. The double-wire braided stent is adopted, and both the first wire and the second wire can be braided in the mode.

step 381, using the intersection where the wire is currently located as the start point of the previous cycle of the initial cycle, so that the wire moves in a V-shape in a manner of bending up and down between the first row and the last row of the previous cycle until the wire moves to the second end point of the previous cycle; the second end point is a crossing point which is passed before the wire returns to the starting point of the current period and is positioned on the first row of the current period and belongs to the same V shape with the starting point of the current period;

Referring to fig. 10 to 15, the wire is knitted in a V-shape until the last cycle, then is knitted in a V-shape return stroke until the first cycle, referring to fig. 16 to 21, the wire is knitted from the last cycle of the first cycle until the first cycle, and then is returned to the start point of the last cycle of the first cycle in a manner of up-down interweaving so as to reach the required length of the stent, that is, the knitting manner of the wire in the cycle below the first cycle is different from the knitting manner in the cycle above the first cycle, no reinforcing rib is adopted after the knitting is completed, the outer diameter of the compressed stent is smaller, the assembly is easy, the flexibility is better, and the knitting process is simpler and more convenient. With a double-wire woven stent, both the first wire 10 and the second wire 20 can be woven in this manner.

The stent braiding method of the present application is specifically described below in five embodiments.

A schematic view of a cylindrical clamp in an expanded state is shown in fig. 1-35. The broken line in the figure indicates the completed wire moving path, and the solid line indicates the wire moving path in the corresponding illustrated step.

Specifically, the cylindrical jigs shown in fig. 1 to 34 are uniformly divided into 14 rows in the circumferential direction, and the cylindrical jigs are uniformly divided into 15 rows in the axial direction.

For convenience of description of the wire moving path, the intersection coordinates are represented by a combination of letters and numbers, a represents a column, B represents a row, and the number of columns increases from left to right and from top to bottom, for example, A3B2 represents the intersection coordinates located in the third column and the second row. The intersection coordinates are dots, representing the knitting positions where the locating pins are located (the individual positions may optionally be without locating pins, as described below); there is no dot at the coordinates of the intersection, which means that no locating pin is required for the position.

First embodiment

Fig. 1 to 5 are schematic diagrams of a knitting process of a first wire 10 in a stent knitting method according to a first embodiment.

The braiding of the first wire comprises the steps of:

S110, taking every n+1 rows as an S period, enabling the first wire to start knitting downwards by taking any knitting position of the 1 st row of the cylindrical clamp as a first starting point of the first S period, and bending and moving up and down in a first V shape between the 1 st row and the n+1 th row until the first wire returns to a first starting point.

Specifically, referring to fig. 1-2, each 3 rows are taken as an S period (i.e., n=2, rows 1-3 and 3-5 are respectively a first S period and a second S period, and so on, the first and second representative sequences here are analogically, with A1B1 as the first starting point, the first wire moves towards A3B3, then moves upwards to A5B1 with A3B3 as the inflection point to form a first V-shape, then moves downwards to A7B3 with A5B1 as the inflection point to form a second first V-shape, the directions of the first V-shape and the second first V-shape are opposite, and according to the above rule, the first wire moves between

rows

1 and 3 until returning to A1B1, at this time, all intersections on

rows

1 and 3 are routed by half the first wire (i.e., the braiding positions on the first row and the last row of the first S period are fully wound by half).

S120, winding a first wire from a first starting point to an n+1th row along half of the first woven first V-shape to form a first reinforcing rib 110.

Specifically, referring to fig. 3, the first wire returning to A1B1 is wound around the first wire woven between A1B1 and A3B3 and around A3B3 and forms the first reinforcing bar 110. The first reinforcing bead 110 may exemplarily refer to fig. 38 and 39, but is not limited to the manner shown in the drawings, in which the first wire is spirally wound on the first wire woven in the previous step to form the first reinforcing bead 110. Referring to fig. 38, the first reinforcing bars 110 are wound around two opposite first V-shapes (refer to A3B3 in fig. 4) at the same knitting position. Referring to fig. 39, the first reinforcing bead 110 is wound around the intersection of the wires (see A2B2 in fig. 3). The first reinforcing rib 110 may axially reinforce the stent, thereby reducing the axial shortening of the stent.

S130, taking the current position of the n+1th row as a first starting point of a second S period, and repeating the step S110 and the step S120 until the first wire is wound to the length required by the bracket.

Specifically, referring to fig. 3-4, the first wire moves to A5B5 with A3B3 as the first starting point of the second S cycle, then moves upward to A7B3 with A5B5 as the inflection point to form a first V-shape of the second S cycle, then moves downward to A9B5 with A7B3 as the inflection point to form a second first V-shape of the second S cycle, the directions of the first V-shape and the second first V-shape are opposite, and according to the rule, the first wire moves between the 3 rd row and the 5 th row until returning to A3B3, at this time, the knitting positions on the 3 rd row and the 5 th row are fully wound. Referring to fig. 5, the braiding is performed according to the above-described rule until the first wire moves to A1B15, the first wire is wound to a desired length of the stent and the braiding is finished, and a first net having first reinforcing ribs 110 thereon is formed on the cylindrical jig. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hook structure (as shown in fig. 36).

Fig. 6 to 9 are schematic views of a knitting flow of the second wire 20 of the stent knitting method in the first embodiment. The braiding of the second wire comprises the steps of:

and M110, taking every m+1 rows as an M period, and enabling the second wire rod to start knitting downwards from any knitting position which is on the 1 st row of the cylindrical clamp and is not passed by the first wire rod as a second starting point of the first M period, and bending and moving up and down in a second V shape between the 1 st row and the m+1 th row until the second wire rod returns to the second starting point.

Specifically, referring to fig. 6 to 7, each 2 rows are taken as one M period (i.e. m=1, rows 1 to 2 and rows 2 to 3 are respectively a first M period and a second M period, and so on, the first and second representative sequences here are that, with A8B1 as the second starting point, the second wire moves towards A9B2, then moves upwards to a10B1 with A9B2 as the inflection point to form a first second V-shape, then moves downwards to a11B2 with a10B1 as the inflection point to form a second V-shape, the directions of the first second V-shape and the second V-shape are opposite, and according to the above rule, the second wire moves between

rows

1 and 2 until the weaving positions of

rows

1 and 2 return to A8B1, and the second wire passes through the intersection of the remaining half of

rows

1 and 2.

M120, winding the second wire from the second starting point to the knitting position on the m+1th row along half of the knitted first second V-shape to form the second reinforcing rib 210.

Specifically, referring to fig. 8, the second wire returning to A8B1 is wound around the second wire woven between A8B1 and A9B2 and wound to A9B2 and forms the second reinforcing bead 210. The second reinforcing bars 210 may be exemplarily referred to fig. 38 and 39, but are not limited to the manner shown in the drawings, in which the second wires are spirally wound on the second wires woven in the previous step to form the second reinforcing bars 210. Referring to fig. 38, the second reinforcing bars 210 are wound around two opposite second V-shapes (refer to A9B2 in fig. 8) at the same knitting position. Referring to fig. 39, the second reinforcing bead 210 is wound around the intersection of the wires (refer to the intersection of the second wire between A8B1 and A9B2 and the first wire between A7B3 and A9B1 in fig. 8). The second reinforcing ribs 210 may axially reinforce the stent, thereby reducing the axial shortening of the stent.

And M130, taking the current position of the m+1th row as a second starting point of a second M period, repeating the steps M110 and M120, and winding the second wire rod to the length required by the bracket.

Specifically, referring to fig. 8 to 9, the second wire moves to a10B3 with A9B2 as the second start point of the second M period, then moves upward to a11B2 with a10B3 as the inflection point to form a first second V-shape in the second M period, then moves downward to a12B3 with a11B2 as the inflection point to form a second V-shape in the second M period, the directions of the first second V-shape and the second V-shape are opposite, and the second wire moves between the 2 nd row and the 3 rd row until returning to A9B2 according to the above rule, at this time, the knitting positions on the 2 nd row and the 3 rd row are fully wound. Braiding is performed according to the above rule until the second wire moves to A8B15, the second wire ends braiding, and a second net is formed on the cylindrical jig, and the second net has second reinforcing ribs 210 thereon. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hook structure (as shown in fig. 36).

In the first embodiment, the first wire and the second wire are both woven downwards from the first row and form two reinforcing ribs, and the first starting point and the second starting point are symmetrical about the axis of the bracket, so that the two reinforcing ribs are symmetrically arranged to axially strengthen the bracket.

Optionally, the second wire uses other knitting positions on the first row except the first starting point (A1B 1) and the symmetry point (A8B 1) of the first starting point as the second starting point, and the two reinforcing ribs formed at this time can reinforce the bracket at specific positions so as to meet special requirements in actual use. Referring to fig. 31 to 34, the second wires are woven starting from the A2B1 of the first row as the second starting point, and the second wire weaving rule is the same as that of the present embodiment, and two adjacent reinforcing ribs are formed on the finally obtained bracket.

Second embodiment

The knitting method of the first wire in the second embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

Fig. 10 to 15 are schematic views of a knitting flow of the second wire 20 of the stent knitting method in the second embodiment.

The braiding of the second wire comprises the steps of:

and M210, taking each m+1 row as an M period, enabling the second wire to start to weave downwards by taking any weaving position of the y2 row of the cylindrical clamp, which is not passed by the first wire, as a second starting point of the M period, and bending and moving up and down in a second V shape between the y2 row and the m+y2 row until the second wire is fully wound on part of weaving positions on the y2 row and the m+y2 row.

Specifically, referring to fig. 10, each 2 rows are taken as one M period (i.e., m=1), A8B1 is taken as a second starting point (i.e., y2=1), the second wire is moved towards A9B2, then A9B2 is taken as an inflection point, the second wire is moved upwards to a10B1 to form a first second V-shape, a10B1 is taken as an inflection point, and then the second wire is moved downwards to a11B2 to form a second V-shape, the directions of the first second V-shape and the second V-shape are opposite, the second wire is moved to a14B1 between the 1 st row and the 2 nd row according to the rule, and at the moment, the second wire is fully wound on part of braiding positions on the 1 st row and the 2 nd row.

M220, in the case where the second wire is wound around part of the positioning pins on the y2 th row and the m+y2 th row (row 2 in fig. 10), moving the second wire from any knitting position (a 14B1 in fig. 10) on the y2 nd row (row 1 in fig. 10) different from the second starting point to the knitting position (A1B 2 in fig. 10) on the m+y2 th row in a half second V-shape.

Specifically, referring to fig. 10-11, with the partial braiding positions on

rows

1 and 2 being fully coiled (i.e., the second wire is not fully coiled) the second wire is moved downwardly from a14B1 to A1B2.

And M230, enabling the second wire to start downwards knitting by taking the current position of the m+y2 row as the second starting point of the next M period. Step M210 and step M220 are repeated until the second wire moves to the second start point of the Y-M th row (Y represents the total number of rows).

Specifically, referring to fig. 11 to 12, the second wire starts to move downward to A2B3 with A1B2 as the second start point of the next M period, then moves upward to A3B2 with A2B3 as the inflection point, moves up to A7B2 according to the above rule, moves downward from A7B2 to A8B3, and moves downward to A9B4 with A8B3 as the second start point of the next M period, thereby moving up to the second start point of the last M period (A1B 14 in fig. 12, i.e., y=15).

M240, enabling the second wire rod to bend and move up and down in a second V shape between the Y-M row and the Y row until the second wire rod winds back to the second starting point of the Y-M row. I.e. the last M cycles of knitting after full wrap back to the second start of the M cycles ready to begin knitting upwards.

Specifically, referring to fig. 12 to 13, the second wire starts to move downward to A2B15 with A1B14 as the second start point of the last M period, then moves upward to A3B14 with A2B15 as the inflection point, and returns to A1B14 according to the above rule. And, two reverse V-shaped on the 14 th row knitting position form a hooking structure.

M250, making the second wire weave upwards and bend and move up and down in a second V shape between the Y-2M row and the Y-M row until the second wire winds back to the second starting point of the last but one M period, and the weaving position of the last but one M period is fully wound. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hooking structure.

Specifically, referring to fig. 14, the second wire starts to weave upward from A1B14 and moves to A2B13, then moves downward to A3B14 with A2B13 as the inflection point, and moves to A8B13 according to the above-described rule, at which time the weaving positions on the 13 th row are all fully wound.

M260, repeating the step M250 until the second wire is wound back to the second starting point of the y2 th row; if y2 is equal to 1, finishing the braiding of the second wire rod; if y2 is equal to m+1, go to step M270; if y2 is equal to km+1 (k is a positive integer not equal to 1), steps M280a-M280f are performed.

In one embodiment, shown in fig. 10-15, where y2 is equal to 1, the second wire is woven upward past the second start point of each M cycle until it is wrapped around to the second start point A8B1 of the 1 st row of locating pins, the second wire ends the weave, a second web is woven on the cylindrical clamp, and the second web is free of second ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hooking structure.

When y2 is equal to 1, the second wire is knitted from the first row, and after each M period is wound by a part of knitting positions, the next M period is knitted until reaching the length required by the bracket, and the above is the descending knitting of the wire. The second wire can be woven up after being wound for the last M period, namely, the last M period returns to the first M period, and the second wire is wound for the rest weaving positions in the up process. In the downstream knitting of each M cycles, the number of knitting positions of the portion around which the second wire is wound may be the same or different.

In another embodiment, y2 is equal to m+1, after step M260, the second wire returns to the second start of the second M cycle, the second wire is wound in a second V-shape between the first row and the last row of the first M cycle until returning to the second start of the second M cycle, the remaining braiding positions on the cylindrical jig are fully wound, the second wire ends braiding, a second web is braided on the cylindrical jig, and the second web is free of second ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hooking structure.

The method comprises the following specific steps: m270, making the second wire weave upwards between the y2-M row and the y2 row to bend and move up and down in a second V shape until the second wire winds back to the second starting point of the y2 row, and finishing the weaving of the second wire. That is, the second wire is wound in a second V-shape between the first and last rows of the first M-cycle of the cylindrical jig over the second start point of the y 2-th row until returning to the second start point of the y 2-th row.

When y2 is equal to m+1, the second wire is knitted in a lower row from the second M period, the last period is fully wound and is knitted in an upper row until all knitting positions except the first M period are fully wound, and then the upper row is continuously knitted and fully wound for the first M period, so that the knitting can be completed.

In one embodiment, y2 is equal to km+1 (k is a positive integer not equal to 1), that is, the second wire starts to weave downwards with any one of the third M period and the period below the third M period as the initial period until the last period is full, and then weaves upwards back to the initial M period, at least two M periods remain unwoven. According to the rule, the second wire rod is further required to be woven in an upward direction, after a part of the weaving positions of one M period are fully wound, the second wire rod is moved to a next M period for weaving until the first M period is fully wound, and then is woven in a downward direction until all the weaving positions are fully wound, so that the second wire rod is woven. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hooking structure.

After the second wire returns to the initial M cycle, the specific steps of braiding are as follows:

m280a, make the second wire rod buckle and move in the second V shape from top to bottom between the y2-M row and the y2 row.

M280b, in case the second wire is fully wound around the y2-M row partial braiding position, moving the second wire from any braiding position of the y2 row different from the second starting point to the y2-M row in a half second V shape.

And M280c, starting the up-knitting of the second wire rod by taking the current position of the y2-M row as a new second starting point, and repeating the steps M280a and M280b until the second wire rod moves to the second starting point of the 1+m row.

M280d, enabling the second wire rod to be bent and moved up and down in a second V shape between the 1+m row and the 1 st row until the second wire rod is wound back to the second starting point of the 1+m row.

The rules of steps M280a-M280d are similar to steps M210-M240, except that steps M210-M240 are downstream weaves and steps M280a-M280d are upstream weaves.

M280e, make the second wire rod weave down between 1+m row and 1+2m row and buckle the removal in second V font from top to bottom, until the second wire rod winds back to the second starting point of 1+2m row.

And M280f, repeating the step M280e, and winding the first wire around the second starting point of the y2 th row to finish the knitting of the second wire.

The rules of steps M280e, M280f are similar to steps M250, M260, except that steps M250, M260 are downstream weaves and steps M280e, M280f are upstream weaves.

y2 is equal to km+1 (k is a positive integer not equal to 1), after the second wire returns to the second starting point of the starting period, the second wire is further required to be woven up and then woven down until the rest of the weaving positions on the cylindrical clamp are fully wound, the second wire finishes weaving, a second net is woven on the cylindrical clamp, and the second net is free of second reinforcing ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent.

Compared with the first embodiment, the bracket woven by the second embodiment has only one reinforcing rib, the compressed outer diameter of the bracket is smaller, the assembly is easy, the flexibility is better, and the weaving process is simpler and more convenient. Further, with the second embodiment, the second wire may be knitted from any cycle.

In the above-described embodiment, the first second V-shape formed by the second wire in each cycle may be a positive V-shape with the opening upward, which is necessary in particular for the embodiment in which knitting starts from the first row of the cylindrical jig. If the second wire is knitted from the last row of the M cycle, the first second V may be an inverted V with the opening downward, and referring to fig. 27 to 30, the second wire starts to be knitted upward with the knitting position on A4B3 as the second starting point (i.e., the first second V is an inverted V), and the second wire knitting rule is similar to that of the present embodiment.

In the case where the second wire is directly crossed at the intersections and is not woven in other directions, it is optional that no positioning pin for supporting the wire is provided at these intersections (i.e., not as a weaving site), and in the example exemplified in the second embodiment, for example, the intersections of A1B2, A8B3, A8B13, etc. may be provided without positioning pins. In other words, the necessary positioning pins need only be provided at the inflection points of the respective V-shapes.

Third embodiment

The knitting method of the first wire in the third embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

Fig. 16 to 21 are schematic views of a knitting flow of the second wire 20 of the stent knitting method in the third embodiment.

The braiding of the second wire comprises the steps of:

m310, taking every m+1th row as an M period, enabling the second wire to start to weave downwards by taking any positioning pin which is not passed by the first wire and is arranged in the y2 th row of the cylindrical clamp as a second starting point of the M period, and bending and moving up and down in a second V shape between the y2 th row and the m+y2 th row.

Specifically, referring to fig. 16, each two rows are taken as one M period (i.e., m=1), the second wire is moved toward A9B2 with A8B1 as a second starting point (i.e., y2=1), then is moved upward to a10B1 with A9B2 as an inflection point to form a first second V-shape, then is moved downward to a11B2 with a10B1 as an inflection point to form a second V-shape, the directions of the first second V-shape and the second V-shape are opposite, and according to the rule, the second wire is moved to A6B1 between the 1 st row and the 2 nd row, and at this time, the knitting position of the 1 st row is fully wound.

And M320, under the condition that the second wire is fully wound with the y2 th row of positioning pins, moving the second wire to the m+y2 th row in half of the last second V shape.

Specifically, referring to fig. 17, in the case where the 1 st row knitting position is fully wound, the second wire is moved downward from A6B1 to A7B2, and the A7B2 may be provided with no positioning pin.

And M330, starting the second wire to weave downwards by taking the current position of the m+y2 row as the second starting point of the next M period, and repeating the steps M310 and M320 until the second wire moves to the second starting point of the last M period.

Specifically, referring to fig. 17, the second wire starts to move downward to A8B3 with A7B2 as the second start point of the second M period, then moves upward to A9B2 with A8B3 as the inflection point, and referring to fig. 18, moves up to A5B2 according to the above rule, moves downward from A5B2 to A6B3, and moves downward to A7B4 with A6B3 as the second start point of the third M period, and referring to fig. 19 to 20, moves accordingly to the second start point A8B15 of the last M period.

M340, enabling the second wire rod to start knitting upwards from the second starting point of the last M period, enabling the second wire rod to sequentially pass through the second starting point of each M period until the second wire rod returns to the second starting point of the y2 th row; if y2 and the like are 1, finishing the knitting of the second wire rod; if y2 is equal to m+1, then M350 is executed; if y2 is equal to km+1 (k is a positive integer not equal to 1), then M360a-M360d are performed.

In one embodiment, shown in fig. 16-21, y2 is equal to 1, then the second wire passes up through the second start of each M cycles in turn until the second wire returns to the second start of row 1 A8B1, the second wire ends the weave, a second mesh is woven on the cylindrical clamp, and the second mesh is devoid of second ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent. Wherein, except for the 1 st row and the 15 th row, no locating pin is arranged at the second starting point position of each row.

In another embodiment, y2 is equal to m+1, after step M340, the second wire returns to the second starting point of the y2 th row, the second wire is wound in a second V-shape between the 1 st row and the y2 nd row locating pins until returning to the second starting point of the y2 nd row locating pins, the remaining braiding position on the cylindrical jig is full, the second wire ends braiding, a second web is braided on the cylindrical jig, and the second web is free of second stiffener 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent.

The method comprises the following specific steps: m350, the second wire rod is upwards woven between the 1 st row and the y2 nd row of positioning pins to be bent and moved up and down in a second V shape until the second wire rod is wound back to the second starting point of the y2 nd row, and then the second wire rod is woven.

In one embodiment, y2 is equal to km+1 (k is a positive integer not equal to 1), that is, the second wire is woven downward from the second start point of the start period until the last row is wound, and then is woven back to the second start point of the start period, at least two M periods remain unwoven. According to the rule, the second wire rod is further required to start to weave upwards with the second starting point of the initial period, wind the first row which is full of one period, namely moves to the first row of the period, wind the first period until winding to the 1 st row, and then sequentially pass through the second starting points of the M periods downwards until the second wire rod returns to the second starting point of the initial period, and the second wire rod finishes weaving.

The method comprises the following specific steps:

m360a, make the second wire rod weave upwards and shift with the second V font and buckle from top to bottom between the y2-M row and the y2 row.

M360b, under the condition that the second wire is fully wound on the y2 th row braiding position, the second wire is moved to the y2 nd-M row by half of the last second V-shape.

And M360c, enabling the second wire to start to weave upwards by taking the current position of the y2-M row as a new second starting point, and repeating the steps M360a and M360b until the second wire moves to the second starting point of the first M period.

Steps M360a-M360c are similar in regularity to steps M310-M330, except steps M310-M330 are downstream weaves and steps M360a-M360c are upstream weaves.

And M360d, enabling the second wire rod to start knitting downwards from the second starting point of the first period, enabling the second wire rod to sequentially pass through the second starting points of the M periods until the second wire rod returns to the second starting point of the starting period, and finishing knitting of the second wire rod.

Step M360d is similar to step M340 except that step M340 is an upstream weave and step M360d is a downstream weave.

And y2 is equal to km+1 (k is a positive integer which is not equal to 1), after the second wire returns to the second starting point of the starting period, the second wire is required to be woven up and then woven down until the rest weaving position on the circumferential clamp is fully wound, the second wire finishes weaving, a second net is woven on the cylindrical clamp, and the second net is free of second reinforcing ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent. Wherein, except for the 1 st row and the 15 th row, no locating pin is arranged at the second starting point position of each row.

Compared with the first embodiment, the bracket woven in the third embodiment has only one reinforcing rib, the compressed outer diameter of the bracket is smaller, the assembly is easy, the flexibility is better, and the weaving process is simpler and more convenient. Similar to the second embodiment, the third embodiment can also begin knitting from either cycle.

Fourth embodiment

Fig. 22 to 26 are schematic diagrams of a knitting flow of the first wire 10 in the stent knitting method in the fourth embodiment.

The braiding of the first wire comprises the steps of:

s210, taking every n+1th row as an S period, enabling the first wire to start knitting upwards by taking any knitting position on the n+y1th row of the cylindrical clamp as a first starting point of the S period, and bending and moving up and down in a first V shape between the y1 th row and the n+y1th row.

Specifically, referring to fig. 22, every 3 rows are taken as one S period (i.e., n=2), a first wire is moved toward A7B3 with A5B5 as a first starting point (i.e., y1=3), then moved downward to A9B5 with A7B3 as an inflection point to form a first V-shape, and then moved upward to a11B3 with A9B5 as an inflection point to form a second first V-shape, wherein the first V-shape and the second first V-shape are opposite in direction. According to this rule, the wire moves to a13B5. At this time, the second wire is located in the last row of the current period and has not yet returned to the first starting point.

S220, under the condition that the first wire is not fully wound on the y1 th row and the n+y1 th row, enabling any weaving position of the first wire, which is different from the first starting point, in the n+y1 th row to be a transition point, and downwards moving the first wire to the 2n+y1 th row in a half of the first V shape.

Specifically, referring to fig. 22 and 23, in the case where the second wire is located at the last row of the current cycle and has not returned to the second start point, the first wire is moved downward from a13B5 to A1B7, and a13B5 may be provided with no positioning pin.

S230, the first wire rod takes the 2n+y1 row current position as the first starting point of the next S period, and the steps S210 and S220 are repeated until the first wire rod is moved to the first starting point of the last S period.

Specifically, referring to fig. 23 and 24, the first wire starts moving upward to A3B5 with A1B7 as the first start point of the next S cycle, then moves downward to A5B7 with A3B5 as the inflection point, according to the above rule, until moving to A9B7, then moves downward to a11B9 with A9B7 (A9B 7 may not be provided with a locating pin) as the transition point, and continues moving upward to a13B7 with a11B9 as the first start point of the next S cycle, according to the rule, until moving to the first start point of the last S cycle (a 13B15 in fig. 24).

S240, enabling the first wire to bend up and down in a first V shape between the first row and the last row (namely the Y-th row of positioning pins and the Y-n-th row of positioning pins) in the last S period, so that the braiding positions of the Y-th row and the Y-n-th row are fully wound.

Specifically, referring to fig. 25, the first wire continues to move up to A1B13 (i.e., y=15) from the first start point a13B15 of the last S cycle, then moves down to A3B15 with A1B13 as the inflection point, until the transition point a11B13 (a 11B13 may not be provided with a locating pin) moving to the 13 th row (i.e., the first row of the last S cycle) according to the above rule, at which time the knitting positions of the 15 th row and the 13 th row (i.e., the first row and the last row of the last S cycle) are all half-full.

S250, enabling the first wire rod to move upwards to the first row (Y-2 n row) locating pins of the last S period from the transition point of the first row (Y-n row) of the last S period in a half first V shape.

Specifically, referring to fig. 25 and 26, the first wire moves from the transition point a11B13 to a13B11 of the 13 th row, then moves downward to A1B13 with the inflection point a13B11 as the inflection point, until the transition point A1B11 to the 11 th row is reached (A1B 11 may not be provided with a locating pin), at which time the knitting positions of the 13 th row and the 11 th row (i.e., the first row and the last row of the penultimate S cycle) are all half-full.

S260, repeating the steps S240 and S250 to enable the first wire to be wound to the n+y1 row of positioning pins; if y1 is equal to 1, then S270 is performed; if y1 is equal to n+1, then S280 is performed; if y1 is equal to kn+1 (k is a positive integer not equal to 1), S290a-S290h are performed.

In one embodiment, y1 is equal to 1, then the first wire is woven upward past the transition point of each row until it returns to the first start of the first S cycle, the first wire ends the weave, a first web is woven on the cylindrical clamp, and the first web is free of first ribs 110.

When y1 is equal to 1, the first wire is knitted from the last row of the first S period, the first V shape is an inverted V shape with a downward opening, after each S period is wound by a part of knitting positions, the next S period is knitted until reaching the length required by the bracket, and the above is the descending knitting of the wire. The first wire can be woven up after being wound for the last S period, namely, the last S period returns to the first S period, and the first wire is wound for half of the rest weaving positions in all S periods in the up process. In the downstream knitting in each S cycle, the number of knitting positions at which the first wire is fully wound may be the same or different.

The method comprises the following specific steps: s270, the first wire rod is bent and moved up and down in a first V shape between the 1 st row of locating pins and the n+1 th row of locating pins, so that the braiding positions of the 1 st row and the n+1 th row are all fully wound by half, the first wire rod is wound back to the first starting point of the first S period, and braiding of the first wire rod is completed.

In one embodiment shown in fig. 22-26, y1=n+1=3, after step S260, the first wire is returned to row 5, the first wire is woven between row 3 and row 5 in a first V-shape until the weaving positions of row 3 and row 5 are fully wound half, the first wire is wound to transition point A3B3 of row 3, the first wire is woven between row 1 and row 3 in a first V-shape until it returns to A3B3, and finally, it is moved to A5B5 over transition point A3B3, the first wire is finished to weave, the first web is woven on the cylindrical jig, and the first web is free of the first stiffener 110.

The method comprises the following specific steps:

s280, enabling the first wire rod to be bent and moved up and down in a first V shape between the y1 row and the y1+n row, so that the braiding positions of the y1 row and the y1+n row are fully wound; the first wire rod is enabled to move upwards to the y1-n rows from the current position of the y1 row as a transition point in a half of the first V shape; the first wire rod is bent and moved up and down in a first V shape between the y1 row and the y1-n rows, so that the braiding positions of the y1 row and the y1-n rows are fully wound by half; and (3) enabling the first wire rod to move downwards from the transition point of the y1 th row to return to the first starting point of the y1+n th row in a half first V shape, and finishing the braiding of the first wire rod.

When y1 is equal to n+1, the first wire rod starts to be woven downwards from the second S period, and is woven upwards after the last S period is fully wound until all weaving positions except the first S period are fully wound, and then the first S period is fully wound by continuous upwards weaving, so that the weaving can be completed.

In one embodiment, y1 is equal to kn+1 (k is a positive integer not equal to 1), which represents that the first wire starts the downstream knitting with any one of the third S cycle and the third S cycle or less as the initial S cycle until the last cycle is fully wound, and then the upstream knitting returns to the initial S cycle, at which time at least two S cycles remain unbraided. According to the rule, the first wire rod is further required to be woven in an ascending mode, after a part of weaving positions of one S period are fully wound, the first wire rod is moved to the previous S period for weaving until the first S period is fully wound, and then the first wire rod is woven in a descending mode until one half of weaving positions of all the S periods are fully wound, so that the first wire rod is woven. If the same knitting position has two reverse V-shapes, the two reverse V-shapes form a hooking structure. That is, the first wire is knitted with one of the knitting positions below 2n+1 row as the first starting point until the last row is wound, and then is knitted back to 2n+1 row, and at this time, the knitting position greater than or equal to 2n+1 row is left unreeled. According to the above rule, the first wire is further required to be woven in 2n+1 row, and the first wire is woven in the first wire up to the first starting point of the initial period after being woven in the first wire up to the 1 st row after being woven in the last S period without being wound in the first S period, and the first wire is woven in the first net on the cylindrical fixture without the first reinforcing ribs 110.

After the first wire returns to the initial S cycle, the specific steps of braiding are as follows:

s290a, enabling the first wire rod to be bent and moved up and down in a first V shape between the y1 row and the y1+n row, so that the knitting position of the y1+n row is fully wound.

S290b, enabling the first wire rod to move upwards to the y1-n rows from the current position of the y1 row as a transition point in a half of the first V shape.

290c, knitting the first wire downwards by taking the current position of the y1-n row as a new first starting point, and bending and moving the first wire upwards and downwards in a first V shape between the y1-n row and the y1 row.

And S290d, under the condition that the first wire is not fully wound on the y1 th to n th row positioning pins by half, enabling any weaving position of the first wire, which is different from the first starting point of the y1 th to n th rows, to be a transition point, and moving the first wire upwards to the y1 st to 2 nd rows in a half first V shape.

S290e, making the first wire rod take the current position of the y1-2n row as a new first starting point, and repeating the step S290c and the step S290d until the first wire rod is moved to the 1 st row.

Steps S290c-S290e are similar in law to steps S210-S230, except steps S210-S230 are down-knit and steps S290c-S290e are up-knit.

S290f, enabling the first wire rod to be bent and moved up and down in a first V shape between the 1 st row and the 1 st+n row, so that the knitting positions of the 1 st row and the 1 st+n row are fully wound.

S290g, the first wire rod moves downwards from the transition point of the 1+n row to the 2n+1 row in a half first V shape.

S290h, repeating the steps S290f and S290g, and winding the first wire rod back to the first starting point of the n+y1th row to complete the knitting of the first wire rod.

Steps S290f-S290h are similar in law to steps S240-S260, except steps S240-S260 are downstream weaves and S290f-S290h are upstream weaves.

In the above-described embodiment, the first V-shape formed by the first wire in each cycle may be an inverted V-shape with a downward opening, that is, the first wire is formed by winding the positioning pins from the last row of each S cycle up to the first row of the current S cycle and then returning to the last row. The first and second V shapes of the first wire may be positive V shapes with upward openings, that is, the first wire is formed by moving down from the first row of each S period to the last row of the current S period, winding the positioning pins, and returning to the first row, where the weaving rule of the first wire is similar to that of the present embodiment.

The second wire weaving rule in this embodiment is similar to the first wire weaving rule in this embodiment, except that the number of intersections spanned by each second V-shape and the first V-shape is different.

Referring to fig. 27-30, the braiding of the second wire includes the steps of:

m410, taking every m+1 row as an M period, enabling the second wire to start to weave upwards by taking any weaving position of the m+y2 row of the cylindrical clamp, which is not passed by the first wire, as a second starting point of the M period, and bending and moving up and down in a second V shape between the y2 row and the m+y2 row (the first row and the last row of the current M period).

Specifically, referring to fig. 27, each 2 rows are taken as one M period (i.e., m=1), the second wire is moved toward A5B2 with A4B3 as a second starting point, then is moved downward to A6B3 with A5B2 as an inflection point to form a first second V-shape, and then is moved upward to A7B2 with A6B3 as an inflection point to form a second V-shape, wherein the direction of the first second V-shape is opposite to that of the second V-shape. According to this rule, the wire moves to a10B3. At this time, the knitting positions of the row 2 and the row 3 are not fully wound.

M420, under the condition that the second wire is not fully wound with the y2 th row weaving position and the m+y2 th row weaving position, making the second wire move downwards to the 2m+y2 th row (namely the last row of the next M period) in a half second V shape from any weaving position of the m+y2 th row (the first row of the next M period) which is different from the second starting point as a transition point of the current M period.

Specifically, referring to fig. 27, in the case where the weaving positions of the 2 nd and 3 rd rows are not fully wound, the second wire is moved downward from a10B3 to a11B4, and no positioning pin may be provided for a10B 3.

And M430, making the second wire rod take the current position of the 2m+y2 th row as a second starting point of the next M period, and repeating the steps M410 and M420 until the second wire rod is moved to the Y-th row (namely the last row of the last M period).

Specifically, referring to fig. 28, the second wire starts to move up to a12B3 with a11B4 as the second start point of the next M period, then moves down to a13B4 with a12B3 as the inflection point, moves down to A3B4 according to the above rule, moves down to A4B5 with A3B4 (A3B 4 may not be provided with a locating pin) as the transition point, and moves up to A5B4 with A4B5 as the second start point of the next M period, thereby moving up to A4B15.

M440, make the second wire rod buckle and move up and down in the second V shape between Y row and Y-M row (namely last row and first row of last M cycle), make Y row and Y-M row weave the position and is all around full.

Specifically, referring to fig. 29, the second wire continues to move up to A5B14 from the second starting point A4B15 of the 15 th row, then moves down to A6B15 with A5B14 as the inflection point, and moves up to A3B14 (A3B 14 may not be provided with a locating pin) according to the above rule, at which time the knitting positions of both the 15 th row and the 14 th row are fully wound.

M450, make the second wire rod move upwards from the transition point of last M cycle to the first row of last M cycle (namely Y-2M row) in half second V font.

Specifically, referring to fig. 29, the second wire is moved from the transition point A3B14 of the last M period to A4B13 on the first row of the last M period, then is moved downward to A5B14 with A4B13 as an inflection point, until the transition point a10B13 of the last M period is moved (a 10B13 may be provided with no positioning pin) according to the above rule, and the knitting positions of the 13 th row and the 14 th row are both fully wound.

And M460, repeating the steps M440 and M450, and winding the second wire rod to the m+y2 row. If y2 is equal to 1, then M470 is performed; if m+1 such as y2, then execute M480; if y2 is equal to km+1 (k is a positive integer not equal to 1), then M490a-M490h are performed.

In one embodiment, y2 is equal to 1, then the second wire is woven upward past the transition point of each M cycles in turn until it is wrapped back to the second start of the m+1 rows (i.e., the first M cycles), the second wire ends the weave, a second web is woven on the cylindrical clamp, and the second web is free of second ribs 210.

The method comprises the following specific steps: m470, make the second wire rod buckle and remove with the second V font from top to bottom between 1 st row and the m+1st row for the weaving position of 1 st row and m+1st row is all fully around, and the second wire rod winds back the second starting point of m+1st row, accomplishes the weaving of second wire rod.

In one embodiment shown in fig. 27-30, y2 is equal to m+1 (i.e., y2=2), after step M460, the second wire is returned to row 3, the second wire is passed over transition point a10B3 of row 3, wound between row 3 and row 2 in a second V-shape until the knitting stations of row 3 and row 2 are fully completed, the second wire is wound over transition point A3B2 of row 2, the second wire is passed over transition point A3B2 of row 2, wound between row 1 and row 2 in a second V-shape until transition point A3B2 of row 2 is passed back, and finally passed over transition point A3B2 to A4B3, the second wire is finished knitting, a second web is knitted on the cylindrical clamp, and the second web is free of second stiffener 210.

The method comprises the following specific steps: m480, enabling the second wire rod to bend and move up and down in a second V shape between the y2 row and the y2+m row, so that the knitting position of the y2+m row is fully wound; enabling the second wire rod to move upwards to the y2-m row from the current position of the y2 row as a transition point in a half second V shape; the second wire rod is bent up and down in a second V shape between the y2 row and the y2-m row, so that the weaving positions of the y2 row and the y2-m row are fully wound; and (3) enabling the second wire rod to move downwards from the transition point of the y2 th row to return to the second starting point of the y2+m th row in a half second V shape, and finishing the knitting of the second wire rod.

In one embodiment, y2 is equal to km+1 (k is a positive integer not equal to 1), that is, the second wire is woven from the second starting point (one of the weaving bits below 2m+1) of the starting M period with any M period of the third M period or less as the starting M period, and then is woven back to 2m+1 after winding to the last M period, and at this time, the weaving bit greater than or equal to 2m+1 is not fully wound. According to the above rule, the second wire is further woven up from the m+1th row, and is not wound by one M period, that is, is moved to the upper row to be wound by the previous M period, until the second wire is wound to the 1 st row, and is woven down until the second starting point of the starting period is returned, so that the second wire is woven, a second net is woven on the cylindrical fixture, and the second net has no second reinforcing rib 210.

The method comprises the following specific steps:

m490a, make the second wire rod buckle and move in the second V shape from top to bottom between the y2 row and the y2+ M row, make the knitting position of the y2+ M row be fully wound.

And M490b, enabling the second wire rod to move upwards to the y2-M row (the first row of the previous M period) in a half second V shape from the current position of the y 2-th row to serve as a transition point of the previous M period.

M490c, making the second wire be woven downwards by taking the current position of the y2-M row as the second starting point of the previous M period, and bending and moving up and down in a second V shape between the y2-M row and the y2 row.

And M490d, under the condition that the second wire is not fully wound on the y2-M rows of knitting positions, enabling the second wire to move upwards to the y2-2M rows (the first row of the last M period) in a half second V shape from any knitting position of the y2-M rows which is different from the second starting point of the second wire to be the transition point of the last M period.

And M490e, taking the current position of the second wire rod in the y2-2M row as a second starting point of the last M period, and repeating the steps M490c and M490d until the second wire rod is moved to the 1 st row.

Steps M490c-M490e are similar to steps M410-M430 except that M490c-M490e is an upstream weave; M410-M430 are downstream weaves.

M490f, make the second wire rod buckle and move in the second V shape up and down between row 1 and row 1+m (first M period), make the weaving position of row 1 and row 1+m is all wound up.

M490g, the second wire is moved downward from the transition point of the first M period to the 2m+1 th row (last row of the second M period) in a half second V-shape.

And M490h, repeating the steps M490f and M490g, and winding the second wire rod back to the second starting point of the m+y2 row to finish the knitting of the second wire rod.

Steps M490f-M490h are similar in law to steps M440-M460 except that M490f-M490h is an upstream weave and M440-M460 is a downstream weave.

In the above-described embodiment, the first and second V shapes formed by the second wire in each cycle may be inverted V shapes with the opening downward. The first and second V-shapes formed in each period of the second wire rod are positive V-shapes with upward openings; referring to fig. 10 to 15, the second wire starts to be knitted downward with A9B2 as the second starting point (i.e., the first second V-shape is a positive V-shape), and the second wire knitting rule is similar to that of the present embodiment.

Compared with the first embodiment, the bracket woven by the fourth embodiment has no reinforcing ribs, the outer diameter of the bracket after compression is smaller, the bracket is easy to assemble, the flexibility is better, and the weaving process is simpler and more convenient. Similar to the third embodiment, the fourth embodiment can also begin knitting from either cycle.

Fifth embodiment

In the fifth embodiment, the knitting method of the first wire is the same as that in the fourth embodiment, and a description thereof will be omitted. The first wire braiding is completed to obtain a first net without the first reinforcing bars 110.

Referring to fig. 31-34, the second wire is woven on a cylindrical jig where the first wire is woven. The method of knitting the second wire is the same as that of the first embodiment, and will not be described here. The second wire braiding is completed to obtain a second mesh having second reinforcing ribs 210. The braided wires of the second mesh are interwoven with the braided wires of the first mesh up and down to form the desired stent.

Compared with the first embodiment, the bracket woven in the fifth embodiment has only one reinforcing rib, the compressed outer diameter of the bracket is smaller, the assembly is easy, the flexibility is better, and the weaving process is simpler and more convenient.

Alternatively, the first wire rod knitting manner and the second wire rod knitting manner in the first embodiment to the fifth embodiment may be arranged and combined to obtain more stent knitting methods, which are not described herein, and should be understood to be within the scope of the present application.

Optionally, the braiding sequence of the first wire 10 and the second wire 20 may be exchanged, that is, the second wire 20 is braided first, so that the second wire 20 bends and moves up and down between the first row and the last row of the M period in the second V shape; the first wire 10 is then bent up and down in a first V-shape between the first and last rows of the S-cycle.

Specifically, referring to fig. 36, the hooking structure is formed by interlocking two first V shapes, which are woven by the first wire 10 and have opposite directions, on the same weaving position; or two second V-shapes which are opposite in direction and are knitted by the second wire 20 on the same knitting position are interlocked. The hooking structure formed by interlocking can ensure that the woven net has good flexibility and small shrinkage.

Specifically, referring to fig. 37, the up-down interlacing structure is formed by interlacing the first wire 10 and the second wire 20, the second wire 20 and the second wire 20, or the first wire 10 and the first wire 10 up-down. The spatial distribution of the upper and lower interweaving passes through follows the principle of uniform symmetry. The upper and lower interweaving structures formed by interweaving can enable the rebound resilience of the net after being axially compressed to be good, the assembly is convenient, the net is even and compact, and obvious phenomena of gaps, bouncing, deviation and the like can not occur after the net is shaped.

An embodiment of the present application further provides a stent woven by the weaving method according to any one of the above embodiments. The support is bent and moved up and down around the locating pin through the first wire rod in the first V shape, the second wire rod is bent and moved up and down around the locating pin which is not wound by the first wire rod in the second V shape, a woven net with a plurality of diamond grids 30 is obtained, the diamond grids 30 of the woven net form a plurality of rows which are sequentially connected along the circumferential direction and form a plurality of rows which are sequentially connected along the axial direction, one of the upper vertexes 310 and the lower vertexes 320 of the diamond grids 30 of part of the woven net is in a hook connection structure, the other one of the diamond grids is in an up and down interweaving structure, namely, the two axially adjacent diamond grids 30 in the part of the woven net are connected by adopting a hook connection structure, and the other diamond grids 30 are connected by adopting an up and down interweaving structure, so that the support simultaneously has the advantages of easiness in assembly, small shrinkage and good flexibility. The stent is suitable for being used in a curved cavity (such as intestinal canal), and the stent length is relatively fixed.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. The method for weaving the bracket is characterized in that a cylindrical clamp is adopted, the cylindrical clamp is uniformly divided into a plurality of rows along the axial direction and is uniformly divided into a plurality of columns along the circumferential direction, each row and each column are intersected to form an intersection, and a positioning pin for winding wires is arranged at least at part of the intersection; the braiding method comprises the following steps:

2. The stent braiding method of claim 1, wherein all rows are divided into a plurality of S-cycles arranged in sequence starting from a first row of all rows, a last row of one S-cycle being a first row of a next S-cycle; meanwhile, starting from the first row of all rows, dividing all rows into a plurality of M periods which are arranged in sequence, wherein the last row of one M period is used as the first row of the next M period; the wires include a first wire and a second wire;

the braiding method comprises the following steps:

3. The method of claim 2, wherein n is 2.ltoreq.4 and m is 1.ltoreq.3.

4. The stent braiding method of claim 1, wherein the braiding method comprises the steps of: starting from the first row of all rows, dividing all rows into a plurality of periods arranged in sequence, wherein the last row of one period is used as the first row of the next period, and each period is provided with at least 2 rows;

5. The stent braiding method of claim 1, wherein the braiding method comprises the steps of: starting from the first row of all rows, dividing all rows into a plurality of periods arranged in sequence, wherein the last row of one period is used as the first row of the next period, and each period is provided with at least 2 rows;

Step 240, moving the wire directly to the beginning of the start cycle.

6. The method of claim 5, wherein the initial cycle is a first cycle and the wire is woven to a desired length at the end of step 240.

7. The stent braiding method of claim 5, wherein the initiation period is a second period; the braiding method further comprises the following steps:

8. The stent braiding method of claim 5, wherein the initiation period is any period between a third period and a third-last period; the braiding method further comprises the following steps:

9. The stent braiding method of claim 1, wherein the braiding method comprises the steps of: starting from the first row of all rows, dividing all rows into a plurality of periods arranged in sequence, wherein the last row of one period is used as the first row of the next period, and each period is provided with at least 2 rows;

10. The stent braiding method of claim 9, wherein the starting cycle is a first cycle and the wire braiding results in a stent reaching a desired length at the end of step 350.

11. The stent braiding method of claim 9, wherein the initiation period is a second period; the braiding method further comprises the following steps:

12. The stent braiding method of claim 9, wherein the initiation period is any period between a third period and a third-last period; the braiding method further comprises the following steps:

13. The stent braiding method of claim 5, wherein the initiation period is any period between a third period and a third-last period; the braiding method further comprises the following steps:

14. The stent braiding method of claim 9, wherein the initiation period is any period between a third period and a third-last period; the braiding method further comprises the following steps:

15. A stent woven by the weaving method according to any one of claims 1 to 14.