Disclosure of Invention
The invention aims to provide a medical support, which solves the problems of large volume and poor flexibility of wire material spliced positions in the support, particularly in the support with a loop structure.
In order to achieve the above object, the present invention provides a medical stent, which is a tubular object formed by braiding, the medical stent includes at least one braided wire and at least one connecting piece, each braided wire forms two wire heads, the connecting piece connects the two wire heads, the two wire heads connected by the connecting piece are from the same braided wire or different braided wires, and the connecting piece is a tube with a groove.
Optionally, at least one of the braided wires is turned at least one end of the medical stent to form a loop structure; the connector connects the spinneret and the other spinneret on the plaiting structure.
Optionally, the groove is a blind hole or a through hole.
Optionally, the extending direction of the groove is arranged at an angle to the axial direction of the connecting piece.
Optionally, the groove extends helically around the connector.
Optionally, the grooves are arranged at intervals along the circumferential direction of the processing section, and circumferential gaps between two adjacent grooves are distributed along the axial direction of the connecting piece in a staggered manner.
Optionally, the connecting piece atress is buckled along radial itself, the pipe diameter of connecting piece is d, the recess is along the radial length of connecting piece is h, the crooked radian of connecting piece is R, then satisfies 0.02 and is less than or equal to (d-2 h)/2R and is less than or equal to 0.06.
Optionally, the connecting piece includes processing section and linkage segment, the recess is arranged in processing section is last, processing section with the linkage segment is along the axial of connecting piece is arranged in proper order.
Optionally, the two spinnerets are welded or adhesively connected with the inner surface of the connecting piece.
Optionally, the connector has openings extending through the outer and inner surfaces of the connector and disposed opposite the two spinnerets.
Optionally, at least part of the grooves are filled with welding material or bonding material.
Optionally, the connecting piece comprises a spring winding structure, and the spring winding structure is a tubular object made by tightly winding wires along the outer surface of the braided wires.
In order to achieve the above object, the present invention also provides a conveying system comprising: the medical stent, the delivery rod and the delivery sheath are preloaded in the delivery sheath.
Optionally, a reducing structure is disposed at the distal end of the delivery rod, and the reducing structure is matched with the connecting piece.
Optionally, the proximal end and the distal end of the delivery rod are both provided with a reducing structure, and the reducing structure is matched with the connecting piece.
In summary, the present invention provides a medical stent and a conveying system, the medical stent is a tubular object formed by braiding, the medical stent includes at least one braided wire and at least one connecting piece, each braided wire forms two wire heads, the connecting piece connects two wire heads, the two wire heads connected by the connecting piece are from the same braided wire or different braided wires, and the connecting piece is a grooved tube. Compared with the existing bracket, the bracket has the following advantages:
The two spinning heads are connected through the connecting piece, so that the volume of the connecting part of the spinning heads is reduced, and meanwhile, the flexibility of the connecting part is improved; furthermore, the splicing points of the braiding wires are arranged at the two ends of the support, so that the limitation of a process is avoided, manual braiding is needed to be carried out off the machine, and the braiding efficiency is improved; furthermore, grooves are engraved on the connecting piece, so that the contact area between the braiding wires and the connecting piece is increased, and the connection strength is improved.
Drawings
Fig. 1 is a schematic structural view of a medical stent according to an embodiment of the present invention;
fig. 2 is a front view of a medical stent according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wire pressing mode of a medical stent according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional shape of a braided wire provided in an embodiment of the invention;
FIG. 5 is a schematic structural view of a connector according to an embodiment of the present invention;
FIG. 6 is a schematic view of a processing section according to an embodiment of the present invention;
FIG. 7a is a schematic structural view of a connector according to an embodiment of the present invention;
FIG. 7b is a schematic view of another structure of a connector according to an embodiment of the present invention;
FIG. 8a is a schematic illustration of one connection of a connector to a spinneret provided in accordance with an embodiment of the present invention;
FIG. 8b is a schematic illustration of another connection of a connector to a spinneret according to an embodiment of the present invention;
FIG. 9a is a cross-sectional view of one connection of a connector to a spinneret provided in accordance with an embodiment of the present invention;
FIG. 9b is a cross-sectional view of another connection of a connector to a spinneret according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view showing a connection between a connector and a braid according to an embodiment of the present invention;
FIG. 11a is a schematic view of an arrangement of connectors according to an embodiment of the present invention;
FIG. 11b is a schematic view of another arrangement of the connecting member according to an embodiment of the present invention;
FIG. 11c is a schematic view of another arrangement of the connecting member according to an embodiment of the present invention;
Fig. 12 is a schematic structural diagram of a conveying system according to an embodiment of the present invention;
FIG. 13 is a partial schematic view of a distal end of a delivery rod and medical stent provided in an embodiment of the present invention;
FIG. 14 is a partial schematic view of a proximal end of a delivery rod and medical stent provided in an embodiment of the present invention;
FIG. 15 is a schematic view of another structure of a conveying rod according to an embodiment of the present invention;
FIG. 16a is a schematic view of a reducing structure according to an embodiment of the present invention;
FIG. 16b is a schematic view of another embodiment of a reducing structure according to the present invention;
FIG. 16c is a schematic view of another structure of the reducing structure according to the embodiment of the present invention;
fig. 16d is another schematic structural view of the reducing structure according to the embodiment of the present invention.
Wherein, each reference sign is explained as follows:
1-braiding wires; 2-a spinneret; 3-connectors; 4-a first welding point; 5-a second welding point; 6-head section; 7-a body segment; 8-a conveying rod; 9-a delivery sheath; 11-folding back point; 31-processing section; 32-connecting segments; 41-welding materials; 42-an adhesive material; 81-conveying a rod segment; 82-conveying a thick section of the rod; 83-a first developing ring; 84-a second developing ring; 85-push pad; 91-a third developing ring; 311-grooves; 312-opening; 313-spacer segment;
1 a-a press-a structure; 1 b-a one-press-two structure; 1 c-two-press two structure;
2 a-round wire; 2 b-flat wire; 2 c-square wires.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As used in this specification, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally used in the sense of comprising "and/or" and the term "several" is generally used in the sense of comprising "at least one," the term "at least two" is generally used in the sense of comprising "two or more," and the term "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or number of technical features indicated. Thus, a feature defining "first," "second," "third," or "third" may explicitly or implicitly include one or at least two such features, with "one end" and "another end" and "proximal end" and "distal end" generally referring to the respective two portions, including not only the endpoints, but also the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, e.g., as being either a fixed connection, a removable connection, or as being integral therewith; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, as used in this specification, an element disposed on another element generally only means that there is a connection, coupling, cooperation or transmission between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through intermediate elements, and should not be construed as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation, such as inside, outside, above, below or on one side of the other element unless the context clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative positional relationships arranged in the direction of gravity; the term "vertical, vertical direction" generally refers to a direction along the force of gravity that is generally perpendicular to the ground, and "horizontal, horizontal direction" generally refers to a direction parallel to the ground; the specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
The invention aims to provide a medical support to solve the problems of large volume and poor flexibility of a spliced part of a knitted wire.
The following description refers to the accompanying drawings.
Referring to fig. 1 to 2, the present embodiment provides a medical stent, which is a tubular object formed by braiding, and includes at least one braided wire 1 and at least one connecting piece 3, wherein each braided wire 1 forms two wire heads 2, the connecting piece 3 connects two wire heads 2, the two wire heads 2 connected by the connecting piece 3 are from the same braided wire 1 or different braided wires 1, and the connecting piece 3 is a tube with grooves. . The braided wire 1 may be one or more of a non-degradable metal material, a non-degradable polymer material, and a degradable polymer material. Those skilled in the art can configure this according to the actual situation, and the present invention is not limited thereto.
Further, at least one of the braided wires 1 turns at least one head end of the medical stent to form a loop structure; the connection 3 connects the spinneret 2 on the plaiting structure with the other spinneret 2. So configured, in the example shown in fig. 1 to 2, the folding back point 11 of the folding back structure is located at the head end of the medical stent, and it should be noted that, in fig. 2, the folding back of the folding back wire 1 is shown in a simplified schematic manner, and in practice, the folding back point 11 may not be a sharp folding angle, but may be smoothly folded as in fig. 1. The risk that the end part of the wire rod stabs the vessel wall after the stent is implanted is effectively avoided, meanwhile, the two wire heads 2 are connected through the connecting piece 3, and the two wire heads 2 are axially and relatively not overlapped, so that the hardness of the joint part of the two wire heads is not increased, the radial width of the joint part is not increased, the volume of the connecting part of the wire heads 2 is reduced, and meanwhile, the flexibility of the connecting part is increased.
Further, as a preferred embodiment, the two spinnerets 2 are coaxially arranged, and the two spinnerets have equal wire diameters, and in this example, the medical stent is divided into a main body section 7 and a head section 6, and in the example shown in fig. 1, the head section 6 is a section where the distal end of the medical stent protrudes radially outwards, the main body section 7 is a section left after the head section 6 is removed, and the splicing point of the two spinnerets 2, i.e. the connecting piece 3, is located in the head section 6 of the medical stent. So dispose, only need turn back braided wire 1 once at the head end of medical support, form and return the structure, then will be located the silk head 2 that returns on the structure through connecting piece 3 and another silk head 2 be connected can, easy operation is convenient, can avoid the hand to weave the step, promotes the braiding efficiency of medical support. In alternative embodiments, the wire diameters between the braided wires 1 may be varied, as the invention is not limited in this regard.
Further, the medical stent is a mesh structure formed by braiding the braided wire 1 in a one-press-one structure 1a, a one-press-two structure 1b, a two-press-two structure 1c, etc. as shown in fig. 3, or the medical stent may be a mesh structure formed by mixing several braiding modes, and the braided wire 1 may be one or more of a round wire 2a, a flat wire 2b, and a square wire 2c as shown in fig. 4, and accordingly, the cross-sectional shape thereof may be circular, elliptical, and square. Of course, in other embodiments, the braiding manner and cross-sectional shape of the braided wire 1 may be other reasonable forms, and the present invention is not limited thereto.
Referring to fig. 5 to 6, the connecting member 3 has a groove 311, the groove 311 penetrates through the outer surface and the inner surface of the connecting member 3 along the radial direction of the connecting member 3, and the extending direction of the groove 311 is disposed at an angle to the axial direction of the connecting member 3, and the angle between the extending direction and the axial direction may be 0 ° to 90 °, i.e., the extending direction of the groove 311 may be perpendicular to the axial direction of the connecting member 3. It will be appreciated that the spinneret 2 and the other spinneret 2 on the plaiting structure are connected to the inner surface of the connector 3. Optionally, the groove 311 is a through hole, and the arrangement of the through hole makes the flexibility of the connection 3 better; in addition, the recess 311 may be a blind hole, which can enhance the flexibility of the connecting member 3 and ensure the strength of the connecting member 3.
The connecting piece 3 may be a cut hypotube, and grooves are cut in the outer surface of the cut hypotube, so that flexibility of the joint of the two spinnerets 2 can be increased. Of course, in some other examples, the connecting member 3 may be a member made of other materials and having other shapes, which is not limited in this invention.
Referring to fig. 5, the connecting piece 3 may bend and deform under the action of force, wherein the pipe diameter of the connecting piece 3 is d, the radial length of the groove 311 along the connecting piece 3 is h, and the maximum radius of curvature that the connecting piece 3 can form is R during the conveying process of the medical stent, so that the requirement of 0.02-2 h/2R-0.06 during the bending process is satisfied. Further, d is the outer diameter of the connecting piece 3, h is the radial distance from the inner surface of the groove 311 to the outer surface of the connecting piece 3, R is the maximum radius of curvature that can be formed when the connecting piece 3 is bent in the conveying process, (d-2 h)/2R represents the maximum deformation amount of the connecting piece 3, when the deformation amount of the connecting piece 3 is greater than 8%, irreversible damage can be generated to the connecting piece 3, and therefore, when the deformation amount of the connecting piece 3 is kept within the range of 2% -6%, the connecting piece 3 has better elasticity and longer service life.
Further, referring to fig. 6, the axial length of the processing section 31 is L, in the example shown in fig. 6, at least two grooves 311 formed at the same axial position form a groove group, and optionally, the grooves 311 are formed by cutting, and in each groove group, a partition 313 is located between circumferentially adjacent grooves 311, and the partition 313 is a part of the main body of the connector 3. In one embodiment, the groove sets comprise two grooves 311 symmetrically arranged about the axis of the connecting member 3, adjacent groove sets being rotated in sequence through a circumferential angle in the axial direction of the connecting member 3 such that adjacent partition sections 313 are not in the same line but are spirally distributed on the connecting member 3. Preferably, the groove sets are rotated through 180 ° in total over the distance L. In another embodiment, the groove sets comprise three grooves arranged centrally symmetrically about the axis of the connecting piece 3, adjacent groove sets being rotated in succession through a circumferential angle in the axial direction of the connecting piece 3, such that adjacent partition sections 313 are not in the same line but are distributed helically over the connecting piece 3. Preferably, the groove sets are rotated through 120 ° in total over the distance L. In other embodiments, the groove sets may be rotated a total of 20 to 360 degrees over the distance of L, or the groove sets may be rotated 1 to 20, such as 10, rotations over the distance of L.
Referring to fig. 7a and 7b, the connector 3 includes a processing section 31 and a connecting section 32, the groove 311 is disposed on the processing section 31, and the processing section 31 and the connecting section 32 are sequentially disposed along the axial direction of the connector 3. So configured, the grooves 311 on the process section 31 can increase the flexibility between the splice of the two spinnerets 2; the arrangement of the connecting section 32 can increase the strength of the connecting piece 3 and prevent the connecting piece 3 from being broken by the stress when the medical bracket is compressed and opened. In the example shown in fig. 7a and 7b, the number of processing segments 31 is 2, and the connecting segments 32 connect two processing segments 31, although in other examples, the number of processing segments 31 and connecting segments 32 may be greater, which is not limited by the present invention.
In an alternative embodiment, the recess 311 extends helically around the connecting member 3 (in this case as shown in fig. 7 a). In another alternative embodiment, the grooves 311 are arranged at intervals along the circumferential direction of the processing section 31, and the circumferential gaps between two adjacent grooves 311 are distributed in a staggered manner along the axial direction of the processing section 31 (in this case, the state is shown in fig. 7 b). Of course, in other embodiments, the arrangement of the grooves 311 may be other reasonable, which is not limited by the present invention.
As an alternative embodiment, please refer to fig. 8a and 8b, wherein two of the spinnerets 2 are welded to the inner surface of the connector 3. It should be noted that, the operator may weld the spinneret 2 and the other spinneret 2 located on the plaiting structure with the inner surface of the connecting piece 3 by using the laser, and the arrangement of the groove 311 can increase the contact area between the laser and the inner surfaces of the two spinneret 2 and the connecting piece 3, so as to improve the connection strength.
Further, referring to fig. 9a and 9b, the connector 3 has an opening 312, and the opening 312 penetrates through the outer surface and the inner surface of the connector 3 and is disposed opposite to the connection position of the two spinnerets 2. So configured, the operator can directly strike laser light through the openings 312 onto the braid 1 during the process of welding the two spinnerets 2 to the inner surface of the connector 3 by laser light, and form the first welding point 4 at the junction of the inner surface of the connector 3 and the outer surface of the braid 1 (in this state, as shown in fig. 9 a); or the second welding point 5 is formed at the connection of the two filament heads 2 (the state is shown in fig. 9 b), it should be noted that, in other embodiments, the welding positions of the filament heads 2 of the braided filament 1 and the inner surface of the other filament head 2 and the connecting member 3 may be other reasonable positions, which is not limited in this invention.
In an alternative embodiment, please continue with reference to fig. 8a and 8b, two of said spinnerets 2 are adhesively connected to the inner surface of said connector 3. It should be noted that, the operator can use the polymer glue to adhere the spinneret 2 and the other spinneret 2 on the woven structure to the inner surface of the connector 3, and the arrangement of the groove 311 can increase the penetration point and penetration rate of the polymer glue, so as to improve the connection strength.
Further, referring to fig. 10, the connecting member 3 includes a coiled spring structure, wherein the coiled spring structure is a tubular material formed by winding a wire material along an outer surface of the braided wire 1, and the wire material is preferably wound tightly or at least partially wound tightly, and in some embodiments, part of the coiled spring structure wound tightly may be positioned in a non-tightly wound manner, and part of the non-tightly wound portion is a groove. The coiled spring structure has softer properties than the tube structure. So configured, the operator can bond the end face of the connector 3 to the outer surface of the braid 1 with a polymer adhesive to function as a connection between the two spinnerets 2.
In an alternative embodiment, at least part of the recess is filled with a welding material 41 or an adhesive material 42. It should be noted that, the bonding material 42 may be polymer glue or other substances with viscosity, and the welding may be performed by using a wire bonding technique, and those skilled in the art may configure the welding material 41 and the bonding material 42 according to practical situations, which is not limited in the present invention.
In some alternative examples, the connector 3 may be arranged flush along the circumference of the medical stent (in this case the situation is shown in fig. 11 a); in other alternative examples, the connecting piece 3 may also be arranged flush along the axial direction of the medical stent (in this state, as shown in fig. 11 b), and the arrangement of the connecting piece 3 along the axial direction can avoid that the local outer diameter is too large in the compressed state of the medical stent to affect the conveying performance; in other examples, the connectors 3 may be arranged in a staggered manner along the circumferential direction of the medical stent (in this case, the state is shown in fig. 11 c), not only in the head section 6, but also in the main section 7, and the connectors 3 may be distributed more uniformly on the outer surface of the medical stent by the staggered manner in the circumferential direction, so that the mechanical and conveying properties are relatively better. It should be noted that the arrangement of the connecting members 3 may be other reasonable forms, and the present invention is not limited thereto.
As shown in fig. 11a-11c, at least one of the braided filaments turns over at the head end of the medical stent to form a loop, the loop forming a loop-back point 11, the connection, 3, connecting the spinneret and the other spinneret located on the loop. In some embodiments, one end of the medical stent forms a backstitch structure; in other embodiments both ends of the medical stent form a backstitch. The two-end woven medical stent reduces the irritation of the spinneret to the blood vessel to a lower degree than the one-end woven medical stent.
Referring to fig. 12 to 13, the present invention further provides a conveying system, including: as described above, the medical stent, the delivery rod 8 and the delivery sheath 9 are preloaded in the delivery sheath 9, and in the preloaded state, the delivery rod 8 is disposed in the delivery sheath 9, and the medical stent is disposed at the distal ends of the delivery rod 8 and the delivery sheath 9. It should be noted that, the medical stent is sleeved on the outer surface of the conveying rod 8, the medical stent and the conveying rod 8 are preloaded in the conveying sheath 9, and the conveying sheath 9 can slide along the axial direction of the conveying rod 8 so as to pull or push the conveying rod 8, thereby further controlling the recovery and release of the medical stent.
Further, a reducing structure is provided at the distal end of the delivery rod 8, and the reducing structure is matched with the connector 3 of the medical stent. It should be noted that, the reducing structure is composed of a thick section 82 of the conveying rod and a thin section 81 of the conveying rod, the thick section 82 of the conveying rod and the thin section 81 of the conveying rod are coaxially arranged, and have the same inner cavity, the inner cavity can be filled with a guide wire of 0.0014 feet, and the main body section of the medical stent is accommodated in the gap between the outer surface of the thick section 82 of the conveying rod and the inner surface of the conveying sheath 9, however, in other examples, the reducing structure can be other reasonable structures, and the person skilled in the art can configure the composition of the reducing structure according to the actual situation, which is not limited by the invention. In the example shown in fig. 12 and 13, the junction of the thick section 82 and the thin section 81 is located at the distal end of the medical stent and is located at the proximal side of the connector 3 located at the distal end of the medical stent, at this time, the connector 3 located at the distal end of the medical stent is accommodated at the junction, and the delivery sheath 9 pushes the delivery rod 8 and the medical stent to move distally until the medical stent is completely released.
In other examples, referring to fig. 14, a reducing structure is provided at the proximal end of the delivery rod 8, and the main body section of the medical stent is received in the gap between the outer surface of the thick section 82 of the delivery rod and the inner surface of the delivery sheath 9. It should be noted that, the joint of the thick section 82 and the thin section 81 of the conveying rod is located at the proximal end of the medical stent and is located at the distal side of the connecting piece 3 located at the proximal end of the medical stent, at this time, the connecting piece 3 located at the proximal end of the medical stent is contained in the joint of the thick section 82 and the thin section 81 of the conveying rod, and the conveying sheath 9 pulls the conveying rod 8 and the medical stent to move proximally until the medical stent is completely recovered.
As a preferred embodiment, in the embodiment shown in fig. 15, both the proximal and distal ends of the delivery rod 8 are provided with a reducing structure, which cooperates with the connecting element 3. At this time, the connecting piece 3 at the distal end of the medical stent is accommodated in the reducing structure at the distal end of the medical stent, the connecting piece 3 at the proximal end of the medical stent is accommodated in the reducing structure at the proximal end of the medical stent, and the conveying sheath 9 moves along the axial direction of the conveying rod 8 so as to drive the conveying rod 8 and the medical stent to move, thereby realizing the release and recovery of the medical stent.
Still further, the delivery system further comprises a push pad 85 and a plurality of developing rings, the push pad 85 being connected to the delivery rod thick section 82, the push pad 85 being located between the outer surface of the delivery rod 8 and the inner surface of the medical stent for contact with the medical stent. In the example shown in fig. 12 and 15, the delivery system includes three developing rings, wherein the first developing ring 83 is disposed at the distal end of the delivery rod 8, the second developing ring 84 is disposed at the proximal end of the delivery rod 8, and the third developing ring 91 is disposed at the distal end of the delivery sheath 9, although in other embodiments, the number and location of developing rings may be in other reasonable forms, and the invention is not limited in this respect. The distance by which the conveying sheath 9 slides in the axial direction of the conveying rod 8 is limited by the position of the developing ring, and, for example, fig. 12 and 15, the farthest position of the sliding is the position where the first developing ring 83 abuts against the third developing ring 91, and the nearest position of the sliding is the position where the second developing ring 84 abuts against the third developing ring 91. The first developing ring 83, the second developing ring 84, and the third developing ring 91 are all made of an X-ray opaque material.
In some alternative exemplary embodiments, referring to fig. 16 a-16 d, the diameter of the thick section 82 of the transfer rod may be stepped to the diameter of the thin section 81 of the transfer rod (as shown in fig. 16 a); the diameter of the thick section 82 of the transfer rod may also taper gradually along the length of the thin section 81 of the transfer rod (as shown in fig. 16 b); the diameter of the thick section 82 of the transfer rod may also taper along part of the length of the thin section 81 of the transfer rod (as shown in fig. 16 c); the diameter of the thick section 82 of the transfer rod may also be arcuately tapered along part of the length of the thin section 81 of the transfer rod (as shown in figure 16 d). Those skilled in the art can configure the connection relationship between the thick section 82 and the thin section 81 according to the actual situation, and the present invention is not limited thereto.
The invention provides a medical support and a conveying system, wherein the medical support is a tubular object formed by braiding, the medical support comprises at least one braiding wire and at least one connecting piece, each braiding wire forms two wire heads, the connecting piece is connected with the two wire heads, the two wire heads connected by the connecting piece are from the same braiding wire or different braiding wires, and the connecting piece is a pipe with a groove.
So configured, the two wire heads are connected through the connecting piece, the volume of the connecting part of the wire heads is reduced, and meanwhile, the flexibility of the connecting part is increased; furthermore, the splicing points of the braiding wires are arranged at the two ends of the support, so that the limitation of a process is avoided, manual braiding is needed to be carried out off the machine, and the braiding efficiency is improved; furthermore, grooves are engraved on the connecting piece, so that the contact area between the braiding wires and the connecting piece is increased, and the connection strength is improved.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.