CN117442846B

CN117442846B - Stay wire ring

Info

Publication number: CN117442846B
Application number: CN202311776912.3A
Authority: CN
Inventors: 刘富华; 李龙斌; 肖相龙; 徐军
Original assignee: Suzhou Huihe Medical Technology Co ltd; Shanghai Huihe Healthcare Technology Co Ltd
Current assignee: Suzhou Huihe Medical Technology Co ltd; Shanghai Huihe Healthcare Technology Co Ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-03-15
Anticipated expiration: 2043-12-22
Also published as: CN117442846A

Abstract

The invention relates to a wire pulling ring, which comprises a wire pulling ring and a wire pulling ring, wherein the wire pulling ring comprises a ring body and a wire pressing body, the ring body is inwards sunken from an annular inner wall to form a plurality of grooves, the ring body is inwards sunken from an end face to form a notch, a boss is arranged in the notch, and two threading holes penetrating through the ring body are formed in the ring body; the pull wire is provided with two threading ends and a closing end, wherein the two threading ends respectively and equidirectionally pass through the threading holes, and the closing end is positioned in the opening and is attached to the boss from the inner side; the line ball body sets up with the integrative or dismouting of ring body, and the line ball body can withhold in the outside of closed end in order to compress tightly the acting as go-between. On one hand, the invention can reduce the assembly gap between the stay wire and the stay wire ring, and can prevent the phenomenon that the polymer extrusion deformation forms bulges or protrusions on the surface of the sheath tube when the bending stress of the sheath tube is large; on the other hand, not only can the assembly of pull wire ring be prevented from appearing the side askew, but also can reduce the direct contact of pull wire ring and inside lining, effectively reduce the leakage risk.

Description

Stay wire ring

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a stay wire ring.

Background

With the continued development of medical technology, interventional therapy has become one of the mainstay of clinical practice in traditional medicine and surgery. The interventional therapy reaches the focus rapidly and accurately through the intervention of various images, has better treatment effect, and has the advantages of low cost, safety, high efficiency, wide application, few complications and the like.

At present, an interventional catheter is used as the most basic consumable material for interventional operations and is widely used in various incorporations, wherein the adjustable bent sheath tube can be bent at the far end of the adjustable bent sheath tube, so that a channel is more conveniently established between a bent lesion part of a blood vessel and an external operation end, and therefore, the cooperation of a stay wire and a stay wire ring is widely applied to the adjustable bent sheath tube and is used as a main stress (tension) component during bending of the sheath tube.

However, in order to ensure the safety of the adjustable bent sheath tube, the strength of the pull wire needs to be ensured to meet the requirement, so that the existing metal pull wire has certain rigidity while meeting the strength requirement, and when the pull wire is assembled with the pull wire ring, the stress generated by bending the pull wire can cause a larger gap between the pull wire and the pull wire ring, so that in actual operation, the following technical problems exist:

1) After the stay wire is assembled with the stay wire ring, the stress part between the stay wire and the stay wire ring cannot be guaranteed to be clung, when the bending stress of the sheath tube is larger, if a polymer exists between the stress points of the stay wire and the stay wire ring, the polymer at the stress point is very likely to form a bulge phenomenon (the adjustable bending sheath tube is in direct contact with a human blood vessel, the surface of the adjustable bending sheath tube is smooth enough and has no bulge) on the surface of the sheath tube after being extruded and deformed by the stay wire, and in order to reduce the gap generated after the stay wire is assembled with the stay wire ring, the positions of the stay wire and the stay wire ring are generally fixed by adopting medical glue, but after the glue is used, the glue is possibly heated and denatured in the subsequent working procedures, so that bubbles are generated and even the fixing effect is lost;

2) The adjustable curved sheath tube has a plurality of technical difficulties, wherein the leakage problem is difficult to solve, and the pull wire ring is also one of the reasons for causing leakage, for example: the assembly back side of the stay wire ring is askew, the inner diameter of the stay wire ring is usually designed to be the minimum required clearance, which causes that the inner side of the stay wire ring is difficult to flow into polymers in the subsequent process, the stay wire ring cannot be effectively separated from the lining of the sheath tube, and the stay wire ring directly collides with the lining during bending, and the lining is broken due to friction, so that the leakage risk is caused;

3) The metal stay wire has certain rigidity, so that the bending radius of the assembled stay wire cannot be too small, otherwise, the bending transition will damage the stay wire, so that a certain distance exists between the stay wires on the same side after the assembly is completed, and if the distance is too large, the subsequent process will be puzzled.

However, for the above-mentioned problems, for example: CN216934397U, it discloses a novel double-pull-wire pull ring for adjustable curved sheath pipe, including the second pull-ring main part, one side welding of second pull-ring main part has first pull-ring main part, and two recesses have been seted up to the symmetry on the second pull-ring main part, equal fixed mounting has the welding piece in two recesses, the wire groove has all been seted up to the both sides of welding piece, the upper end welding of welding piece has the acting as go-between. Through seting up the recess on second pull ring main part to weld the welding piece that has semi-circular upper end in the inside welding of recess, can effectually weld the stay wire on the welding piece, increase the welding strength of stay wire and second pull ring main part, circular arc-shaped wire groove has been seted up simultaneously in the both sides of welding piece, can weld the stay wire joint in the wire groove of acting as go-between, further strengthen welding strength, simultaneously effectually improved the pull resistance, solved easy deformation cracked problem. Although the technical problems 1) and 3) described above can be solved to some extent, there are the following drawbacks: (1) because the top end of the stay wire does not form buckling force, even after welding, the closed end of the stay wire is easy to outwards prop open to form a gap, so that welding failure is caused, namely, the probability of bulge phenomenon exists; (2) because of the installation clearance between the lining of the sheath tube and the inner wall of the pull ring main body, once the sheath tube is fully attached, the polymer is difficult to flow between the lining and the pull ring main body, so that the pull ring main body directly collides and rubs with the lining during bending, and the lining is broken to cause leakage risk; (3) the two pull ring main bodies are required to be combined, the structure is complex, the self-forming is difficult, the wire drawing is required to be welded, the operation is difficult, and then, for an interventional catheter, unpredictable use risks exist once the connecting parts are too many.

Another example is: CN116473600a, it discloses a pull wire ring assembly, a first pull ring main body, a second pull ring main body and a bending sheath tube, and relates to the technical field of medical apparatus and instruments. The pull ring assembly includes: a first pull ring main body provided with a plurality of abutting pieces protruding to the distal end side, both sides of the abutting pieces being provided with a pull wire hole penetrating the first pull ring main body in the axial direction; and the second pull ring body is positioned at the distal end side of the first pull ring body and is provided with a bearing part opposite to the pull wire hole. The stay wire hole is worn to establish by the curved line of accent for when the first free end and the second free end of curved line of accent extend to the outside of first pull ring main part, first free end and second free end all can be followed the upper and lower direction in stay wire hole and removed, can avoid the big problem of welding degree of difficulty, also can guarantee its tensile properties simultaneously. In one embodiment, the distal end side of the first tab body is provided with a first clamping portion, the second tab body is provided with a second clamping portion, the bearing portion is formed between two adjacent second clamping portions, the first clamping portion is configured to be connected with the second clamping portion, that is, the first tab body and the second tab body are clamped, other connection modes are not excluded, for example, the second tab body is screwed on the first tab body by a thread or the like, so long as the alignment line can be limited. The first clamping part is matched with the second clamping part, so that the second pull ring main body and the first pull ring main body can be connected and detached, and meanwhile, when the second pull ring main body and the first pull ring main body are connected, the bending line is prevented from falling off from the first pull ring main body. Although the technical problems 1) and 3) described above can be solved to some extent, there are the following drawbacks: (1) after the second clamping parts are rotationally matched into the first clamping parts, a bearing part is formed between two adjacent second clamping parts to close the accommodating groove to form limit of the bending line (note that the limit is not the abutting buckling, but obviously the bearing part is attached to the bottom edge of the first pull ring main body, so that buckling pressure is not formed at the closing end of the bending line, even if the closing end of the pull wire is easily outwards spread to form a gap after welding, welding failure is caused, namely, the probability of 'bulge phenomenon' exists; (2) because of the installation clearance between the lining of the sheath tube and the inner wall of the pull ring main body, once the sheath tube is fully attached, the polymer is difficult to flow between the lining and the pull ring main body, so that the pull ring main body directly collides and rubs with the lining during bending, and the lining is broken to cause leakage risk; (3) the combination of two pull ring bodies is required, so that the structure is complex, the self-forming is difficult, and then, for an interventional catheter, once the connecting parts are too many, unpredictable use risks exist.

Another example is: CN115300752a, which discloses a cardiovascular interventional therapy instrument delivery system, a sheath and a bending adjusting method thereof. The sheath tube comprises a tube body, wherein the tube body is provided with a main body section, a first bending section and a second bending section, and the first bending section and the second bending section can be bent; the sheath further comprises: a first pull wire loop disposed in or connected with the distal end portion of the first tuning section; the first bending control stay wire is arranged in the first stay wire cavity in a penetrating way and is provided with a first end connected with the first stay wire ring and a second end penetrating out of the proximal end part of the main body section; a second wire loop disposed in a proximal portion of the first tuning section and/or a distal portion of the second tuning section; the second bending control stay wire is arranged in the second stay wire cavity in a penetrating mode and is provided with a first end connected with the second stay wire ring and a second end penetrating out of the proximal end of the main body section. Multiple bends through a sheath form a planar or spatial combination of bends that permits the intended release of the implant or the reduction of space occupied in the heart to allow room for other instruments. The number of the first bending control stay wire, the bending return stay wire and the second bending control stay wire can be one or can be arranged in pairs. The number of the first bending control stay wire, the number of the return bending stay wires and the number of the second bending control stay wires are one, and the middle parts of the stay wires are folded back at the first stay wire ring or the second stay wire ring to form two sections of stay wires which are parallel to each other. The first wire ring is provided with two pairs of first threading holes which extend along the central line C respectively, the first bending control wire passes through one pair of first threading holes, and the bending control wire passes through the other pair of first threading holes, so that the connection between the wire and the wire ring can be realized without additional connection means. The second wire drawing ring is provided with a connecting part connected with the second bending control wire drawing, a first avoiding part used for avoiding the first bending control wire drawing and a second avoiding part used for avoiding the bending return wire drawing, a pair of second threading holes extending along the center line C are formed in the connecting part, the second bending control wire drawing passes through the second threading holes, the first bending control wire drawing passes through the inner side or the outer side of the first avoiding part, and the bending return wire drawing passes through the inner side or the outer side of the second avoiding part. The inner diameter of the first avoidance part is larger than that of the connecting part, and the outer diameter of the second avoidance part is smaller than that of the connecting part. That is, the wall thickness of the second wire loop is not uniform, a groove recessed radially outwards is formed at the first avoiding part, and the first bending control wire passes through the groove; a radially inwardly recessed groove is formed at the second relief portion, through which the return bend line passes. Although the above relates to a radially inwardly concave groove, it is evident from the above analysis that the groove is mainly provided for the first bending-control wire and the return bending wire to pass through, which still has the following drawbacks: (1) because the top end of the stay wire does not form buckling force, even after welding, the closed end of the stay wire is easy to outwards prop open to form a gap, so that welding failure is caused, namely, the probability of bulge phenomenon exists; (2) because there is the installation clearance between the inside lining of sheath pipe and the inner wall of pull ring main part, once laminate comprehensively, the polymer hardly flows into between inside lining and the pull ring main part, consequently, pull ring main part and inside lining direct collision, friction when turning, lead to the inside lining to break and initiate the leakage risk.

Disclosure of Invention

In order to overcome the drawbacks of the prior art, it is an object of the present invention to provide an improved wire loop.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a pull wire ring, its includes the ring body, and the ring body inwards caves in order to form a plurality of recesses that reduce the inside lining contact of ring body and sheath, and the ring body inwards caves in from the terminal surface and form the opening, is equipped with in the opening from the bottom along the outside boss of arch of the axial of ring body, and forms two through wires holes that run through oneself on the ring body of boss both sides, pull wire ring still include with the ring body is integrative or the dismouting sets up the line ball body on the opening, and when the line assembly, pull wire has two wire ends and closed end, and wherein two wire ends respectively and the syntropy pass the through wires hole, and closed end is located the opening and pastes from the inboard to establish on the boss, and the line ball can provide and withhold in the outside of closed end along the radial and the axial buckling force of ring body of boss in order to compress tightly the line, and the polymer forms in inside lining periphery and fills to recess and opening so that ring body and inside lining interval.

Preferably, the inner side of the closed end is fully attached to the outer side face of the boss, in short, the bending rate formed by the closed end is equal to that formed by the boss, the stay wire is fully attached to the stay wire ring, and the bulge phenomenon is avoided when the bending stress of the sheath tube is large.

According to a specific implementation and preferred aspect of the present invention, the width of the boss is W1; the distance between two threading ends which penetrate through the two threading holes is W, the W gradually decreases along the threading direction value and forms Wmax and Wmin, wherein W1 is less than or equal to Wmax; wmin=0. Therefore, the bonding requirement of bending the metal stay wire is met, the gap generated by movement of the stay wire is reduced, and meanwhile, the distance between stay wires on the same side is reduced, so that the follow-up process is facilitated.

Preferably, the cross section of the boss is semicircular; and/or the two end surfaces of the boss are respectively flush with the inner wall surface and the outer wall surface of the ring body.

In some embodiments, the plurality of grooves are distributed in an annular array about a centerline of the ring body. Each groove extends along the axial direction of the ring body, and both ends are opened. Here, recess design in this application not only can prevent to act as go-between the back side of ring assembly askew, and the interior footpath of acting as go-between is usually designed to required minimum clearance Xmin moreover, this will cause in the subsequent process act as go-between the ring inboard more difficult inflow polymer, can not effectively separate the lining of acting as go-between ring and sheath, the lining direct collision, friction leads to the lining to break and cause leakage risk when turning, consequently, the recess can flow into the polymer and separate the lining of acting as go-between ring and sheath to reduce the direct contact of acting as go-between ring and lining, effectively reduce leakage risk.

According to still another specific implementation and preferred aspect of the present invention, the wire pressing body is a buckling die piece formed in the opening and capable of being buckled to form inward buckling, wherein the buckling die piece can avoid the stay wire when the stay wire is worn; after the stay wire is attached to the boss, the buckling die piece deforms and is pressed on the outer side of the closed end of the stay wire. The gap generated after the stay wire and the stay wire ring are assembled is further limited by adopting a deformation compaction mode.

Preferably, the buckling mold pieces are two, and are oppositely arranged at two opposite sides of the boss at intervals; and/or the buckling mold piece and the ring body are integrally formed. The two buckling and pressing mold pieces are formed in an integral molding mode, so that the processing is convenient, and the buckling and pressing of the two sides are respectively carried out to achieve the purpose of expected compression.

In some embodiments, the buckling mold piece extends from the bottom surface and/or the side surface of the opening to the opening or the middle part of the opening, wherein when the buckling mold piece is in a threading state, the threading hole is positioned between the buckling mold piece and the boss or the buckling mold piece is relatively far away from the bottom surface of the opening to form buckling avoidance; when in a line pressing state, the two buckling mold pieces are respectively bent inwards to form buckling pressures along the radial direction of the boss and the axial direction of the ring body to press on the closed end, so that actual processing is facilitated.

Further, each buckling and pressing die piece extends from the bottom surface of the opening to the opening of the opening, and the buckling and pressing die pieces are arranged at intervals with the side wall of the opening; or each buckling mold piece extends from the side wall of the opening to the middle of the opening, and the extending end part is tilted outwards to form avoidance; the extending end is deformed inwards to form buckling.

In some embodiments, the crimping die is inserted into the notch from both ends and forms a crimping force that extends radially and is crimped inwardly along the closed end. And buckling in a disassembling and assembling mode.

Preferably, insertion grooves are formed on opposite side walls of the notch, two ends of the buckling mold piece are respectively inserted into the insertion grooves, and deformation parts arched outwards from the buckling mold piece are buckled on the stay wire. The inserting grooves are oppositely penetrated in the thickness direction of the ring body so as to facilitate the disassembly and assembly of the buckling mold piece. Typically, the two slots are angled at 90 ° to 180 °, i.e., after the die is mounted, the die is bent inward from both ends at an angle of about 120 ° to 150 °, with the best angle being 130 °.

In addition, the notch is located between two adjacent grooves, and two notches are formed, wherein the two notches are located on two opposite sides of the ring body. In some specific embodiments, the end part of the ring body, which is far away from the notch, is provided with a notch groove corresponding to the notch one to one, two end parts of the threading holes are respectively communicated with the notch and the notch groove, and the distance between two threading ends which are penetrated out from the two threading holes is gradually reduced and is penetrated out from the notch groove after being relatively attached. Under the design of the notch groove, an operation space is provided for reducing the spacing between the pull wires at the same side, so that the subsequent process is facilitated, meanwhile, the assembly of the pull wires and the pull wire ring is further relatively fixed, the gap between the pull wires and the stress part of the pull wire ring is reduced, and the occurrence probability of the bulge phenomenon is reduced.

Meanwhile, the material of the pull ring can be stainless steel, nickel titanium and other metals; the pull wire is a steel wire rope.

Compared with the prior art, the invention has the following advantages:

the existing pull wire ring not only can not meet the seamless assembly of the pull wire and the pull wire ring, but also can not effectively separate the pull wire ring from the lining of the sheath tube because the pull wire ring is askew at the rear side of the assembly and the inner side of the pull wire ring is harder to flow into the polymer, when the bending stress of the sheath tube is larger, if the polymer exists between the pull wire and the stress point of the pull wire ring, the polymer at the position is most likely to form a bulge phenomenon on the surface of the sheath tube after being extruded and deformed by the pull wire, meanwhile, the pull wire ring directly collides with the lining during bending, and rubs to cause the lining to break so as to cause leakage risk, in addition, because the metal pull wire has certain rigidity, the bending radius of the assembled pull wire cannot be too small, otherwise, a certain distance exists between the pull wires at the same side after the assembly, and the defect of trouble and the like is caused to the subsequent procedures is caused if the distance is too large, and the pull wire ring is skillfully designed. After the wire drawing ring is adopted, an inner support is formed by an arched boss firstly, then the wire pressing of a wire pressing body is adopted to eliminate the assembly gap between the wire drawing and the wire drawing ring, and meanwhile, the wire drawing ring is effectively separated from the inner lining of the sheath tube by the design of an inner ring groove to finish the assembly of the wire drawing ring; on the other hand by the design of inner ring recess, not only can prevent that the assembly of pull wire ring from appearing the side skew, but also can reduce the direct contact of pull wire ring and inside lining, effectively reduce leakage risk, need not two ring body cooperation simultaneously, promptly, adopt simpler structure in order to be convenient for the equipment of pull wire ring.

Drawings

FIG. 1 is a schematic diagram of the wire loop in embodiment 1;

FIG. 2 is a schematic view of the structure of the wire in FIG. 1 after being inserted;

FIG. 3 is a schematic front view of FIG. 2;

FIG. 4 is a schematic front view of the pull wire ring of embodiment 1;

FIG. 5 is a schematic illustration of the pull ring of example 1 in use;

FIG. 6 is a schematic diagram of the structure of the pull wire ring in embodiment 2;

FIG. 7 is a schematic view of the structure of FIG. 6 after the pull wire is inserted therein;

FIG. 8 is a schematic front view of FIG. 7;

fig. 9 is a schematic front view of the wire loop in embodiment 2;

FIG. 10 is a schematic front view of the pull ring of example 2 in use;

FIG. 11 is a schematic diagram of the structure of the pull wire ring in embodiment 3;

FIG. 12 is a schematic view of the structure of FIG. 11 after the pull wire is inserted therein;

FIG. 13 is a schematic front view of FIG. 12;

fig. 14 is a schematic front view of the wire loop in embodiment 3;

FIG. 15 is a schematic front view of the pull ring of example 3 in use;

wherein: 1. a pull wire; 1a, threading end; 1b, a closed end;

2. pulling a wire loop; 20. a ring body; 20a, grooves; 20b, a notch; 20c, a notch groove; 20d, a boss; 20e, threading holes; 200. a plug-in groove; 21. a wire pressing body; m, withholding the die piece;

A. a polymer layer; n, lining.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "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 orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

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 application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated 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 terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, 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.

Example 1

As shown in fig. 1 to 4, the wire ring 2 of the present embodiment includes a ring body 20 and a wire pressing body 21, and the assembled wire 1 has two threading ends 1a and a closing end 1b, wherein the wire 1 is a wire rope; the material of the pull wire ring 2 can be stainless steel, nickel titanium and other metals; and the two stay wires 1 are respectively inserted at two opposite sides of the stay wire ring 2, and the wire pressing bodies 21 are pressed on the corresponding stay wires 1.

In some embodiments, the ring body 20 is recessed inwards from the annular inner wall to form a plurality of grooves 20a for reducing contact between the ring body 20 and the inner liner N of the sheath, the ring body 20 is recessed inwards from the end face to form a notch 20b, meanwhile, the end of the ring body 20 away from the notch 20b is provided with a notch groove 20c corresponding to the notch 20b one by one, a boss 20d arched outwards from the bottom is arranged in the notch 20b, two threading holes 20e penetrating through the ring body 20 are formed on the ring body 20 on two sides of the boss 20d, two ends of the threading holes 20e are respectively communicated with the notch 20b and the notch groove 20c, two threading ends 1a of the pull wire 1 respectively and equidirectionally penetrate through the threading holes 20e, and a closed end 1b is positioned in the notch 20b and is attached on the boss 20d from the inner side, the distance between the two threading ends 1a penetrating from the two threading holes 20e is gradually reduced and relatively attached and then penetrates from the notch groove 20c, wherein the cross section of the boss 20d is semicircular, the two end surfaces of the boss 20d are respectively flush with the inner and outer wall surfaces of the ring body 20, the inner side of the closed end 1b is comprehensively attached to the outer side surface of the boss 20d (in short, the bending rate formed by the closed end is equal to the bending rate formed by the boss, the stay wire and the stay wire ring are comprehensively attached and assembled, the occurrence of a bulge phenomenon is avoided when the bending stress of the sheath tube is large), the width of the boss 20d is W1, the distance between the two threading ends 1a penetrating from the two threading holes 20d is W, the W is gradually reduced along the threading direction value and Wmax and Wmin are formed, and Wmax are met, and w1=wmax; wmin=0. Therefore, the bonding requirement of bending the metal stay wire is met, the gap generated by movement of the stay wire is reduced, and meanwhile, the distance between stay wires on the same side is reduced, so that the follow-up process is facilitated.

In this example, the plurality of grooves 20a are distributed in an annular array with respect to the center line of the ring body 20. Each groove 20a extends along the axial direction of the ring body 20, and both ends are disposed open. Here, recess 20a design in this application not only can prevent the side of pull ring assembly back askew, and the pull ring internal diameter is usually designed to required minimum clearance Xmin moreover, this will cause the pull ring internal side to be difficult to flow into the polymer in the follow-up process, can't effectively separate the pull wire ring with the inside lining of sheath, pull wire ring and inside lining direct collision, friction lead to the inside lining to break and initiate leakage risk when turning, consequently, the recess can flow into the polymer and separate the pull wire ring with the inside lining of sheath to reduce the direct contact of pull wire ring and inside lining, effectively reduce leakage risk. The gap 20b is located between two adjacent grooves 20a, and the gap 20b is two, wherein two gaps 20b are located at two opposite sides of the ring body 20, the gap groove 20c corresponds to the two gaps, meanwhile, under the design of the gap groove 20c, an operation space is provided for reducing the spacing between the stay wires at the same side, so that the subsequent process is facilitated, meanwhile, the assembly of the stay wires and the stay wire rings is further relatively fixed, gaps between the stay wires and stress parts of the stay wire rings are reduced, and the occurrence probability of a bulge phenomenon is reduced.

Further, the wire pressing body 21 can be buckled on the outer side of the closed end 1b to press the wire 1. The wire pressing body 21 is a buckling die m which is formed in the opening 20b and can be bent, wherein the buckling die m can avoid the stay wire 1 when the stay wire 1 is worn; after the stay wire 1 is attached to the boss 20d, the buckling die m deforms and is pressed on the outer side of the closed end 1b of the stay wire 1. The gap generated after the stay wire and the stay wire ring are assembled is further limited by adopting a deformation compaction mode.

In some embodiments, the number of the pressing die m is two, and the pressing die m is arranged on two opposite sides of the boss 20d at opposite intervals, and meanwhile, the pressing die m extends from the top edge of the opening 20b to the middle (transversely extends) respectively, and the extending end parts are arranged on two opposite sides of the top of the boss 20d at opposite intervals.

Referring to fig. 5, the assembly process of the wire loop of the present embodiment is as follows:

selecting two transversely extending ring bodies 20 of buckling mold pieces m, tilting the extending end parts outwards to form avoidance, enabling the inner sides of the closed ends 1b to be fully attached to the outer side faces of the bosses 20d after passing through the two threading holes 20d from the two threading ends 1a in the same direction by adopting a stay wire 1, enabling the two threading ends 1a on the same side to be relatively attached in a notch groove 20c and then penetrating out of the notch groove 20c, respectively breaking off the two buckling mold pieces m, enabling the extending end parts of the buckling mold pieces m to be bent inwards and buckled on two opposite sides of the closed ends 1b of the stay wire 1, so as to form buckling force for the bosses 20d to extend radially and the axial direction of the ring body 20, assembling the stay wire and the stay wire ring under the conditions that the inner support, the outer compression and the threading ends are relatively attached, and finally bonding the inner liner N to form a polymer layer A after the outer circumference of the liner N is filled in the grooves 20a and the notches 20b on the inner sides of the ring body 20, and accordingly preventing leakage of the liner N from being generated by layering.

Example 2

As shown in fig. 6 to 9, the wire loop of the present embodiment is substantially the same as the wire loop of embodiment 1, except for the following.

In this example, the two buckling mold pieces m extend from the bottom surface of the opening 20b to the mouth (i.e. longitudinally extend), and are spaced from the side wall of the opening 20b, when the threading state is in, the threading hole 20e is located between the buckling mold pieces m and the boss 20d to form bending avoidance; in the crimping state, the two crimping dies m are respectively bent inward to form crimping forces radially along the boss 20d and axially along the ring body 20 to the closed end 1b of the pull wire 1. The buckling die sheet m can deform or be arranged at intervals to form an effective threading avoidance, so that actual processing is facilitated.

Referring to fig. 10, the assembly process of the wire loop of the present embodiment is as follows:

after two longitudinally extending buckling mold pieces m are selected to form a ring body 20 with threading avoidance, a pull wire 1 is adopted to pass through two threading holes 20d from two threading ends 1a in the same direction, the inner side of a closed end 1b is fully attached to the outer side face of a boss 20d, simultaneously, two threading ends 1a on the same side are oppositely attached in a notch groove 20c and then penetrate out of the notch groove 20c, then, the two buckling mold pieces m are respectively broken off, the outer end parts of the buckling mold pieces m are respectively bent inwards and buckled on two opposite sides of the closed end 1b of the pull wire 1, so that buckling forces of the boss 20d in the radial direction and the axial direction of the ring body 20 are formed, and therefore, the pull wire 1 and the pull wire ring 2 are assembled under the conditions of keeping inner support, outer compression and the relative attachment of the threading ends, then molten polymer is formed on the periphery of the liner N and fills in the notch 20b on the inner side of the ring body, and finally the liner N is adhered to form a polymer layer A, and leakage of the liner N is prevented.

Example 3

As shown in fig. 11 to 14, the wire loop of the present embodiment is substantially the same as the wire loop of embodiment 1, except for the following.

In this example, the crimping die m is inserted into the notch 20b from both ends and forms a crimping force extending radially along the closed end and crimping inwardly. And buckling in a disassembling and assembling mode.

In some embodiments, the opposite side walls of the opening 20b are formed with insertion grooves 200, and both ends of the buckling die m are respectively inserted into the insertion grooves 200, and the deformed portion from the outward arch is buckled on the pull wire. The insertion groove 200 is relatively penetrated in the thickness direction of the ring body 20 to facilitate the disassembly and assembly of the fastening mold sheet. Typically, the two slots 200 are angled at 90 ° to 180 °, i.e., after die attach, they are bent inward from both ends at an angle of about 120 ° to 150 °, with the most preferred angle being 130 °.

As shown in fig. 15, the assembly process of the wire loop of the present embodiment is as follows:

after the pull wire 1 passes through the two threading holes 20d from the two threading ends 1a in the same direction, the inner side of the closed end 1b is fully attached to the outer side surface of the boss 20d, meanwhile, the two threading ends 1a on the same side are oppositely attached in the notch groove 20c and then pass out of the notch groove 20c, then, the buckling die m is selected to be elastically bent from two ends to the middle, meanwhile, two ends of the buckling die m are inserted into the corresponding inserting grooves 200, the bent middle is in arc-shaped contact with the outer side of the closed end 1b, so that the boss 20d is radially extended and the buckling pressure of the ring body 20 is formed, the pull wire and the pull wire ring are assembled under the conditions of keeping inner support, outer compression and the opposite attachment of the threading ends, and then molten polymer is formed on the periphery of the liner N and fills the grooves on the inner side of the ring body and the notch 20b, and finally the liner N is adhered to form a polymer layer A, and leakage of the liner N is prevented.

Therefore, after the stay wire ring is adopted, the inner support formed by the arched boss is firstly penetrated out by the relative joint of the notch groove, and finally the line pressing of the line pressing body is adopted to eliminate the assembly gap between the stay wire and the stay wire ring, meanwhile, the inner ring groove of the ring body is designed to effectively separate the stay wire ring from the inner liner of the sheath tube so that the stay wire and the stay wire ring are assembled under the conditions of keeping the inner support, the outer pressure and the relative joint of the threading end, therefore, on one hand, the invention can reduce the assembly gap between the stay wire and the stay wire ring and prevent the phenomenon that the polymer extrusion deformation forms bulges or protrusions on the surface of the sheath tube when the bending stress of the sheath tube is large; on the other hand, the assembly of the pull wire ring can be prevented from being askew, the direct contact between the pull wire ring and the lining can be reduced, and the leakage risk is effectively reduced; the bending rate formed by the closed end of the third aspect is equal to that formed by the boss, the stay wire and the stay wire ring are comprehensively attached and assembled, so that the bulge phenomenon is avoided when the bending stress of the sheath tube is large, the attaching requirement formed by bending the metal stay wire is met, and the gap generated by the movement of the stay wire is reduced; the design of the inner ring groove in the fourth aspect can prevent the pull wire ring from being askew after being assembled, and the inner diameter of the pull wire ring is usually designed to be the minimum required clearance Xmin, which causes that the inner side of the pull wire ring is difficult to flow into a polymer in the subsequent process, the pull wire ring cannot be effectively separated from the lining of the sheath tube, and the pull wire ring is directly collided with the lining during bending, friction causes the lining to be broken to cause leakage risk, so that the groove can flow into the polymer to separate the pull wire ring from the lining of the sheath tube, thereby reducing the direct contact between the pull wire ring and the lining and effectively reducing the leakage risk; in the fifth aspect, under the design of the notch groove, an operation space is further provided for reducing the spacing between the pull wires at the same side, so that the subsequent process is facilitated, meanwhile, the assembly of the pull wires and the pull wire ring is further relatively fixed, the gap between the pull wires and the stress part of the pull wire ring is reduced, and the occurrence probability of a bulge phenomenon is reduced; the sixth aspect adopts a deformation compaction mode to further limit the gap generated after the stay wire and the stay wire ring are assembled, and simultaneously adopts an integral forming or disassembling mode to facilitate processing; in the seventh aspect, whether the buckling at two sides or the arch lamination abutting buckling is adopted, buckling force along the radial direction of the boss and the axial direction of the ring body can be formed to buckle on the pull wire, so that the buckling stability is improved, and gaps generated after the pull wire and the pull wire ring are assembled are eliminated more favorably; the eighth aspect is simple in structure, convenient to implement, and low in cost, and does not require two ring members to cooperate, i.e., a simpler structure is adopted to facilitate assembly of the wire pulling ring.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A pull wire ring comprising a ring body, characterized in that: the ring body inwards sunken in order to form the many recesses that reduce ring body and sheath's inside lining contact from annular inner wall, just the ring body inwards sunken from the terminal surface forms the opening, be equipped with in the opening from the bottom along the outside boss of arch of the axial of ring body, just form two through wires holes that run through oneself on the ring body of boss both sides, gu the ring still include with ring body an organic whole or dismouting sets up the line ball body on the opening, and when the line assembly, gu have two threading ends and closed end, wherein two threading ends respectively and the syntropy pass the through wires hole, closed end is located in the opening and paste from the inboard and establish on the boss, the line ball can provide along the boss is radial with the outside of ring body axial withhold in order to compress tightly the line ball, the polymer forms the inside lining periphery and pack to in the recess with in the opening so that the ring body with the inside lining interval.

2. The wire loop of claim 1 wherein: the inner side of the closed end is fully attached to the outer side face of the boss.

3. The wire loop of claim 2 wherein: the width of the boss is W1; the distance between two threading ends which penetrate through the two threading holes is W, the W gradually becomes smaller along the threading direction and Wmax and Wmin are formed, wherein W1 is less than or equal to Wmax; wmin=0.

4. A pull wire ring as claimed in claim 3, wherein: the cross section of the boss is semicircular; and/or, the two end surfaces of the boss are respectively flush with the inner wall surface and the outer wall surface of the ring body.

5. The wire loop of claim 1 wherein: the grooves are distributed in an annular array by taking the axis of the ring body as the central line.

6. The wire loop of claim 1 wherein: each groove extends along the axial direction of the ring body, and two ends of each groove are open.

7. The wire loop of claim 1 wherein: the line pressing body is a buckling die piece which is formed in the opening and can be bent to inwards buckle, wherein the buckling die piece can avoid the stay wire when the stay wire is worn; after the stay wire is attached to the boss, the buckling die piece deforms and is pressed on the outer side of the closed end of the stay wire.

8. The wire loop of claim 7 wherein: the buckling mold pieces are two, and are oppositely arranged at two opposite sides of the boss at intervals; and/or, the buckling mold piece and the ring body are integrally formed.

9. The wire loop of claim 8 wherein: the buckling mold piece extends from the bottom surface and/or the side surface of the opening to the opening or the middle of the opening respectively, wherein when the threading state is in the threading state, the threading hole is positioned between the buckling mold piece and the boss or the buckling mold piece is relatively far away from the bottom surface of the opening to form bending avoidance; when in a line pressing state, the two buckling mold pieces are respectively bent inwards to form buckling pressure on the closed end along the radial direction of the boss and the axial direction of the ring body.

10. The wire loop of claim 9 wherein: each buckling and pressing die piece extends from the bottom of the opening to the opening of the opening, and the buckling and pressing die pieces are arranged at intervals with the side wall of the opening.

11. The wire loop of claim 9 wherein: each buckling die piece extends from the side wall of the opening to the middle of the opening, and the extending end parts are tilted outwards to form avoidance; the extending end is deformed inwards to form buckling.

12. The wire loop of claim 7 wherein: the buckling mold piece is outwards arched from two end parts, and the two end parts of the buckling mold piece are respectively inserted into the notch.

13. The wire loop of claim 12 wherein: and the opposite side walls of the notch are provided with inserting grooves, two ends of the buckling and pressing die piece are respectively inserted into the inserting grooves, and the deformation parts arched outwards are buckled and pressed on the pull wire.

14. The wire loop of claim 13 wherein: the insertion grooves are oppositely penetrating through the ring body in the thickness direction.

15. The pull wire ring of any one of claims 1 to 14, wherein: the notch is positioned between two adjacent grooves; and/or the number of the openings is two, wherein the two openings are positioned on two opposite sides of the ring body.

16. The wire loop of claim 15 wherein: the ring body is kept away from the breach place tip be equipped with the breach one-to-one's breach groove, the both ends of through wires hole respectively with the breach groove intercommunication, and from two the distance between two through wires ends that the through wires hole was worn out diminishes gradually and laminate relatively the back is followed the breach groove is worn out.