Stay wire friction performance testing device and testing method

Abstract

The invention relates to a stay wire friction performance testing device and testing method. The testing device comprises a box body and a support, a first wire passing hole and a second wire passing hole are formed in the box body, and a wire penetrating hole penetrating through the support is formed in the support, so that a pull wire can sequentially penetrate through the first wire passing hole, a support hole and the second wire penetrating hole to be arranged in the box body in a bent and penetrating mode. The stay wire can reciprocate relative to the bracket under the action of external force and rub with each other, so that the friction performance of the stay wire can be evaluated by checking whether the stay wire is fluffed or whether fibers fall off from the stay wire; therefore, the possibility of thrombus or obstruction in the body of a patient caused by unqualified friction performance of the stay wire in the interventional therapy process can be reduced. And on the other hand, the closed space is formed in the box body, and the free range of the fallen fibers is limited, so that the workload of visual inspection or inspection by using an amplification instrument can be reduced, the friction performance of the fibers can be evaluated and tested quickly, and the test efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of interventional therapy auxiliary equipment, and in particular to a wire friction performance testing device and a testing method. Background Art

[0002] Interventional therapy is a new treatment technology developed internationally in recent years. Its principle is to use modern high-tech means to perform a minimally invasive treatment. With the development of interventional technology, a wire-controlled technology based on self-expanding valve prosthesis has emerged. The purpose of wire control is to achieve stable release or recovery of self-expanding valve prosthesis at the target anatomical position. The implementation of this technology requires setting a threading hole on the stent of the self-expanding valve prosthesis, so that the pull wire passes through the threading hole of the stent, and the release or recovery of the stent is controlled by applying force or releasing force on the pull wire, and relative sliding between the pull wire and the stent is formed. Through this wire control operation, the stent is implanted at the lesion position, thereby achieving local treatment of the lesion in the body. This technology has the characteristics of no surgery, less trauma, fast recovery, and good effect, avoiding the harm of traditional surgical operations to patients.

[0003] However, the stent of the self-expanding valve prosthesis is formed by metal cutting, and the pull wire is mostly woven from fibers. During the process of releasing or retrieving the stent controlled by the pull wire, there is relative sliding friction between the pull wire and the threading hole of the stent, so it is easy for the metal stent to cut the pull wire fiber or even cause the fiber to fall off, which may lead to thrombosis or obstruction in the patient's body. At present, there is no effective evaluation test tooling and test method for the friction performance of the pull wire in the wire control technology on the market. Summary of the invention

[0004] Based on this, it is necessary to provide a wire friction performance testing device and test method, which can test and evaluate the degree of wear of the wire and the possibility of fiber shedding outside the human body, in view of the fact that there are currently no effective evaluation test tools and test methods for the friction performance of the wire in the wire control technology on the market.

[0005] According to one aspect of the present application, a wire friction performance testing device is provided, comprising:

[0006] The box body has a receiving cavity, and the outer wall of the box body is provided with a first wire passing hole and a second wire passing hole communicating with the receiving cavity;

[0007] A bracket is arranged in the accommodating cavity, and the bracket is provided with a bracket hole penetrating the bracket. The first wire passing hole, the bracket hole and the second wire passing hole are configured to jointly define a tortuous wire passing channel for the pull wire to pass through.

[0008] In one embodiment, the box body includes a box body and a sealing cover, the accommodating cavity is opened in the box body, one side of the box body has an opening connected to the accommodating cavity, and the sealing cover can be openably connected to the box body to close the opening of the accommodating cavity, so that the accommodating cavity is sealed.

[0009] In one embodiment, a mounting shaft is provided in the box body, the mounting shaft is detachably connected to the inner wall of the box body, the bracket is fixedly arranged on the mounting shaft, a threading hole passing through the mounting shaft is opened on the side wall of the mounting shaft, and the threading hole is connected with the bracket hole so that the pull wire can pass through the bracket hole and the threading hole in the box body in sequence.

[0010] In one embodiment, one of the inner wall of the box body and the end of the mounting shaft is provided with a positioning column, and the other is correspondingly provided with a positioning hole, and the positioning column is pluggably inserted into the positioning hole;

[0011] Alternatively, a slide groove is provided on the inner wall of the box body, and a slider is provided on the end of the mounting shaft, and the slider can be slidably limited in the slide groove.

[0012] In one embodiment, the bracket is mesh-shaped and is sleeved on the outer circumference of the mounting shaft. The outer circumference of the mounting shaft is provided with a limit block. The limit block passes through the mesh of the bracket and abuts against the bracket to limit the relative movement of the bracket along the circumferential direction of the mounting shaft.

[0013] In one embodiment, the first wire passing hole and the second wire passing hole are respectively opened on adjacent two side walls of the box body, and / or the first wire passing hole, the bracket hole and the second wire passing hole are equidistant from the bottom wall of the box body.

[0014] In one embodiment, the wire pulling friction performance testing device also includes two sealing plugs, which are respectively inserted into the first wire passing hole and the second wire passing hole with interference fit to seal the first wire passing hole and the second wire passing hole respectively, and each of the sealing plugs is provided with a valve opening passing through two opposite axial ends thereof, and the valve opening is used for allowing the wire to pass through.

[0015] In one embodiment, each sealing plug is provided with a sealing film at one end facing the box body, the sealing film closes one end of the valve opening facing the accommodating cavity, and the sealing film is configured to be pierced by the pull wire to pass through the valve opening.

[0016] In one embodiment, the outer peripheral surface of each sealing plug is provided with a first limiting ring and a second limiting ring surrounding its own central axis, the first limiting ring and the second limiting ring are arranged at intervals along the axial direction of the sealing plug, the first limiting ring abuts against the outer wall of the box body, and the second limiting ring abuts against the inner wall of the box body.

[0017] In one of the embodiments, the outer wall of the box body is provided with a fixing portion, and the fixing portion is used to be connected to a vise so that the box body is fixed by the vise.

[0018] According to another aspect of the present application, a method for testing the friction performance of a wire is provided, which is implemented by using the wire friction performance testing device as described above, and the wire friction performance testing method comprises the following steps:

[0019] Pass the pull wire through the first wire hole, the bracket hole and the second wire hole in sequence, so that the pull wire is bent and passed through the box;

[0020] Pulling the pull wire back and forth so that the pull wire and the periphery of the bracket hole rub against each other back and forth;

[0021] The friction performance of the wire was observed.

[0022] In one embodiment, the step of reciprocatingly pulling the pull wire so that the pull wire and the periphery of the bracket hole rub against each other reciprocally includes:

[0023] Lay the box flat with the first cable hole facing downward;

[0024] A counterweight is connected to one end of the pull wire near the first wire hole, and a power source is connected to one end of the pull wire near the second wire hole;

[0025] The power source is started to make the power source pull the pull wire to move back and forth relative to the box.

[0026] In one embodiment, the evaluation of the friction performance of the pull wire includes observing whether the pull wire is fuzzy or observing whether there are any detached fibers in the box.

[0027] The above-mentioned wire pulling friction performance testing device and testing method are provided by setting a box in the wire pulling friction performance testing device, opening a first wire passing hole and a second wire passing hole on the box, and by setting a bracket in the box, and opening a threading hole that penetrates the bracket on the bracket, so that the wire pulling can pass through the first wire passing hole, the bracket hole and the second threading hole in sequence and be bent and pass through the box. On the one hand, under the action of external force, the wire pulling can be stretched and reciprocated relative to the bracket, so that the wire pulling can reciprocate with the periphery of the bracket hole while reciprocating relative to the bracket. In this way, the purpose of evaluating and testing the wire pulling friction performance can be achieved by checking whether the wire pulling is fluffy or whether there are fibers falling off from the wire pulling, thereby reducing the possibility of thrombosis or obstruction in the patient's body due to unqualified wire pulling friction performance during interventional treatment. On the other hand, since the box forms a relatively closed space, the free range of the falling fiber is limited, thereby reducing the workload of visual inspection or inspection using a magnifying instrument, and then the friction performance of the fiber can be quickly evaluated and tested, thereby improving the efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axial view of a wire friction performance testing device provided in one embodiment of the present application.

[0029] Figure 2 An exploded view of a wire friction performance testing device provided in one embodiment of the present application.

[0030] Figure 3 This is an isometric view of the sealing cover, the mounting shaft and the bracket when they are connected in the wire pulling friction performance testing device provided in one embodiment of the present application.

[0031] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0032] Figure 5 A top view of the internal structure of a wire friction performance testing device provided in one embodiment of the present application.

[0033] Figure 6 This is an axial side view of the box body of the wire pulling friction performance testing device provided in one embodiment of the present application.

[0034] Figure 7 An axial side view of a sealing cover and a mounting shaft connected to each other in a wire pulling friction performance testing device is provided for one embodiment of the present application.

[0035] Figure 8 A cross-sectional view of a sealing cover and a mounting shaft connected to each other in a wire pulling friction performance testing device provided in one embodiment of the present application.

[0036] Fig. 9An exploded view of a wire friction performance testing device provided in another embodiment of the present application.

[0037] Fig.10 An axial view of the internal structure of a wire pulling friction performance testing device provided in another embodiment of the present application.

[0038] Fig.11 A side view of an installation shaft in a wire pulling friction performance testing device provided in another embodiment of the present application.

[0039] Fig.12 Axial side view of the box body in the wire friction performance testing device provided in another embodiment of the present application Figure 1 .

[0040] Fig.13 Axial side view of the box body in the wire friction performance testing device provided in another embodiment of the present application Figure 2 .

[0041] Fig.14 This is an exploded view of the installation of the box body and the sealing plug in the wire friction performance testing device provided in one embodiment of the present application.

[0042] Fig.15 A cross-sectional view of a sealing plug in a wire friction performance testing device provided in one embodiment of the present application.

[0043] Description of reference numerals:

[0044] 10. Test fixture; 100. Box body; 101. Accommodating cavity; 110. Box body; 111. First wire hole; 112. Second wire hole; 113. Limiting groove; 114. Second positioning column; 115. Slide; 120. Sealing cover; 121. Connecting block; 122. First positioning column; 200. Bracket; 201. Bracket hole; 300. Mounting shaft; 301. Threading hole; 302. First positioning hole; 303. Second positioning hole; 304. Limiting block; 305. Slider; 400. Sealing pad; 500. Fixing part; 600. Sealing plug; 601. Valve port; 602. Sealing membrane; 603. First limiting ring; 604. Second limiting ring; 70. Pull wire. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0051] The present application provides a wire pulling friction performance testing device and a testing method. The wire pulling friction performance testing method is implemented using the wire pulling friction performance testing device. The method can test the friction performance of the wire, thereby being able to evaluate the degree of wear of the wire and the possibility of fiber shedding.

[0052] The following uses the pull wire used to release or recover the self-expanding valve prosthesis in the wire control technology of the self-expanding valve prosthesis as an example to describe the structure of the pull wire friction performance testing device and the steps of the pull wire friction performance testing method in the present application. It can be understood that in other embodiments, the pull wire friction performance testing device and the testing method of the present application are not limited to the pull wire used in the wire control technology of the self-expanding valve prosthesis, but can also be any other type of pull wire with the possibility of wear, which is not limited here.

[0053] See also Figures 1 to 5 , Figures 1 to 5 The structure diagram of the cable friction performance test device 10 in one embodiment of the present application is shown. The cable friction performance test device 10 (hereinafter referred to as the test device 10) provided in one embodiment of the present application includes a box 100, a bracket 200 and a mounting shaft 300, wherein the box 100 may be a cubic, cup or bottle-shaped structure, and has a sealed accommodating cavity 101 inside to form a sealed space; the bracket 200 and the mounting shaft 300 are both arranged in the accommodating cavity 101, for example, detachably connected to the inner wall of the box 100. The bracket 200 is used to rub against the cable 70 to test the wear performance of the cable 70, and the mounting shaft 300 is used to support the bracket 200 so that the bracket 200 is firmly fixed in the box 100.

[0054] Specifically, combined Figures 1 to 5As shown, the outer wall of the box body 100 is provided with a first wire hole 111 and a second wire hole 112 connected to the accommodating chamber 101; the bracket 200 is provided with a bracket hole 201 penetrating the bracket 200, and the side wall of the mounting shaft 300 is provided with a threading hole 301 penetrating the mounting shaft 300. The bracket 200 is fixedly connected to the mounting shaft 300, and the threading hole 301 and the bracket hole 201 are mutually connected and arranged in alignment, and the aperture of the bracket hole 201 is slightly larger than the diameter of the pull wire 70. Preferably, the first wire hole 111 and the second wire hole 112 are respectively provided on the adjacent two side walls of the box body 100, and the first wire hole 111, the second wire hole 112, the bracket hole 201, and the threading hole 301 are at an equal distance from the bottom wall of the box body 100 (that is, the box body 100 is at a distance of 1 / 4 of the bottom wall of the box body 100). Figure 1 The first wire hole 111, the second wire hole 112, the bracket hole 201 and the threading hole 301 are configured to define a tortuous wire passage together, so that the pull wire 70 can be bent along the wire passage through the box body 100, for example, it can be bent into Figure 5 The right angle shown in FIG. is passed through the box body 100. In this way, under the action of external force, the pull wire 70 is stretched and reciprocates relative to the bracket 200, so that the pull wire 70 can reciprocate with the periphery of the bracket hole 201 while reciprocating relative to the bracket 200, so that the wear degree of the pull wire 70 and the possibility of fiber shedding can be tested and evaluated outside the human body.

[0055] In some embodiments, see Figure 1 and Figure 2 The box body 100 is a split structure, including a box body 110 and a sealing cover 120, wherein the accommodating chamber 101 is opened in the box body 110, one side of the box body 110 is open, and the opening is connected to the accommodating chamber 101, and the sealing cover 120 can be openably connected to the box body 110 and close the opening of the accommodating chamber 101, so that the accommodating chamber 101 is set to be airtight and can contain liquid. Specifically, the purpose of containing liquid is because the fibers on the pull line 70 are small, and it is difficult to detect when observing the fibers of the pull line 70 falling off. By utilizing the characteristics that the fibers are small and can float on or suspend in the liquid, the free range of the detached fibers can be limited and easy to observe. The sealing cover 120 can be removed from the box body 110 to open the box body 110, so that the liquid can be poured into the box body 110. When testing, the sealing cover 120 is connected to the box body 110 to seal the opening of the box body 110 to prevent the liquid from leaking from the box body 110.

[0056] Optionally, in order to prevent liquid from overflowing, a sealing gasket 400 is provided on the side of the sealing cover 120 facing the accommodating cavity 101. The sealing gasket 400 can be integrally formed with the sealing cover 120 or separately formed. The sealing gasket 400 is made of a flexible material and can form a seal at the opening of the box body 110 under pressure, thereby effectively preventing liquid leakage.

[0057] Furthermore, if Figure 6 and Figure 7 As shown, the opening periphery of the box body 110 is provided with two oppositely disposed limiting grooves 113, and the periphery of the sealing cover 120 is correspondingly provided with two oppositely disposed connecting blocks 121, and each connecting block 121 is correspondingly limited in one limiting groove 113, so that the sealing cover 120 and the box body 110 are coupled with each other and tightly cover the box body 110, thereby limiting the relative movement of the sealing cover 120 along the circumferential direction of the box body 110. In other embodiments, there may be multiple limiting grooves 113 and multiple connecting blocks 121, respectively, without special limitation.

[0058] It is understandable that the structure of the box 100 can also be an integrally formed structure, and it can also be a non-sealed structure, and the mounting shaft 300 can also be omitted, and only the bracket 200 can be set in the accommodating cavity 101 of the box 100, as long as the bracket 200 does not shake during the friction between the pull wire 70 and the bracket 200, and there is no specific limitation. However, the structure designed as a split type can facilitate the installation and replacement of the bracket 200 and the mounting shaft 300, and the structure designed as a sealed structure can contain liquid, so that when it is necessary to detect the fiber shedding, the free range of the shedding fiber can be reduced, so as to conduct the test more conveniently and quickly, and the bracket 200 can be fixedly installed on the mounting shaft 300 to avoid the shaking of the bracket 200, which is obviously a better embodiment.

[0059] In addition, it can also be understood that the first wire passing hole 111 and the second wire passing hole 112 can be opened at any position of the box body 100, for example, they can be opened on the same side wall or on opposite side walls instead of on adjacent two side walls, and they can also be opened at different heights than at the same height, or they are not at the same height as the threading hole 301 and the bracket hole 201, as long as the pull wire 70 can be bent and passed through the box body 100 and can contact the periphery of the bracket hole 201, and can rub against the periphery of the bracket hole 201 when the pull wire 70 is pulled back and forth.

[0060] Furthermore, the mounting shaft 300 is detachably connected to the sealing cover 120. Figure 8 As shown, a positioning column is provided on the side of the sealing cover 120 facing the accommodating cavity 101, and the positioning column is defined as a first positioning column 122. A positioning hole is correspondingly provided on the end of the installation shaft 300 close to the sealing cover 120, and the positioning hole is defined as a first positioning hole 302. The first positioning column 122 is pluggable and inserted into the first positioning hole 302. Furthermore, the mating surface of the first positioning column 122 and the first positioning hole 302 is a conical surface, so that the installation shaft 300 and the sealing cover 120 can be more easily plugged in and out of each other.

[0061] In other embodiments, the first positioning hole 302 may be opened on the side of the sealing cover 120 facing the accommodating cavity 101 , and the first positioning column 122 may be disposed at the end of the mounting shaft 300 .

[0062] To further prevent the shaking of the mounting shaft 300, please continue to refer to Figure 6 and Figure 7 The bottom wall of the accommodating cavity 101 is also provided with a positioning column, which is defined as a second positioning column 114. The second positioning column 114 is arranged opposite to the first positioning column 122 arranged on the sealing cover 120. The end of the mounting shaft 300 away from the first positioning hole 302 is provided with a second positioning hole 303 corresponding to the second positioning column 114. The second positioning column 114 is pluggable and inserted into the second positioning hole 303. Similarly, refer to Figure 8 The mating surface between the second positioning column 114 and the second positioning hole 303 is preferably a conical surface, and similarly, the second positioning hole 303 can be opened on the bottom wall of the accommodating cavity 101, and the second positioning column 114 is set at the end of the mounting shaft 300 corresponding to the second positioning hole 303, and there is no special limitation.

[0063] In order to simulate the real surgical environment as much as possible, the material of the stent 200 is the same as that of the stent 200 used for the self-expandable valve prosthesis, preferably nickel-titanium alloy, and may also be other types of metal materials. Figure 3 In this embodiment, the bracket 200 is a mesh structure, which is cut from a nickel-titanium metal tube, thereby forming a plurality of mesh holes that penetrate the bracket 200, and the threading holes 301 are formed by punching holes at the nodes of two adjacent metal rods. The mounting shaft 300 is columnar, which can be cylindrical or polygonal. The bracket 200 is sleeved on the outer circumference of the mounting shaft 300. The outer circumference of the mounting shaft 300 is provided with a limit block 304. The limit block 304 is penetrated through the mesh holes of the bracket 200 and abuts against the bracket 200, thereby limiting the relative movement of the bracket 200 along the circumferential direction of the mounting shaft 300, thereby preventing the bracket hole 201 and the threading hole 301 from being misaligned with each other.

[0064] In this way, through the above-mentioned arrangement, the installation shaft 300 and the sealing cover 120 are connected to each other. When the sealing cover 120 is opened, the installation shaft 300 can also be taken out from the box body 110 together with the sealing cover 120. In this way, when the accommodating chamber 101 is filled with liquid, since the volume occupied by the installation shaft 300 is large, as the installation shaft 300 is taken out, the liquid level will inevitably drop significantly, thereby reducing the detection range and saving detection time.

[0065] In addition, as a further improvement, in order to further reduce the shaking of the test device 10 during the test process, the outer wall of the box body 100 is provided with a fixing portion 500, and the fixing portion 500 is used to connect with an external device (such as a vise) so that the box body 100 can be fixed by the vise. In the above embodiment, the fixing portion 500 is arranged on the side of the sealing cover 120 away from the accommodating cavity 101. When the sealing cover 120 needs to be opened, the sealing cover 120 can be opened by holding the fixing portion 500, which is convenient for operation. Of course, the fixing portion 500 is not limited to being arranged on the sealing cover 120, and can also be arranged on any outer wall of the box body 100, without special limitation here.

[0066] It is worth noting that the mounting shaft 300 is not limited to being detachably connected to the sealing cover 120. Figures 9 to 12 In another embodiment, the installation shaft 300 is detachably connected to one of the inner walls of the box body 110. In this embodiment, a slide groove 115 is provided on one of the inner walls of the box body 110, and a slider 305 is provided at the end of the installation shaft 300. The slider 305 can be slidably limited in the slide groove 115. In this way, the installation shaft 300 and the box body 110 can be disassembled from each other by pulling the slider 305 of the installation shaft 300 out of the slide groove 115, or the installation shaft 300 can be installed in the box body 110 by pushing the slider 305 of the installation shaft 300 into the slide groove 115 after disassembly. In this embodiment, the fixing portion 500 can also be set on the sealing cover 120, or on any outer wall of the box body 110, and there is no limitation, and it is combined with Figures 9 to 13 As shown, the remaining structures of the box body 100, the bracket 200 and the mounting shaft 300 are the same as those described in the previous embodiment, and the details are not repeated here.

[0067] In order to better seal the box 100, as a further improvement to the above embodiment, Fig.14 As shown, the test device 10 also includes two sealing plugs 600, which are respectively inserted into the first wire hole 111 and the second wire hole 112 with interference fit to seal the first wire hole 111 and the second wire hole 112 respectively. Each sealing plug 600 is provided with a valve port 601 passing through two opposite axial ends thereof. Preferably, the aperture of the valve port 601 is substantially equal to the aperture of the pull wire 70, so that the pull wire 70 can pass through the valve port 601 and the sealing plug 600.

[0068] Preferably, the sealing plug 600 is made of a flexible material such as rubber, and a sealing film 602 is provided at one end of each sealing plug 600 facing the inside of the box body 100. The sealing film 602 closes the end of the valve port 601 facing the accommodating chamber 101, and the sealing film 602 is configured to be pierced by the pull wire 70 to pass through the valve port 601, so that the sealing of the box body 100 can be ensured before the pull wire 70 is installed in the testing device 10.

[0069] Further, see Fig.15 The outer circumference of each sealing plug 600 is provided with a first limiting ring 603 and a second limiting ring 604 surrounding its own central axis, and the first limiting ring 603 and the second limiting ring 604 are arranged at intervals along the axial direction of the sealing plug 600, the first limiting ring 603 abuts against the outer wall of the box body 100, and the second limiting ring 604 abuts against the inner wall of the box body 100. In this way, the sealing plug 600 can have a better sealing effect.

[0070] The following combined Figures 1 to 15 , introduces the operating steps of the method for testing the friction performance of the wire 70 using the testing device 10 provided in the present application.

[0071] In the first step, the pull wire 70 is passed through the first wire hole 111 , the bracket hole 201 and the second wire hole 112 in sequence, so that the pull wire 70 is bent and passed through the box body 100 .

[0072] Specifically, before performing this step, the test device 10 needs to be assembled. First, the bracket 200 needs to be sleeved on the installation shaft 300, and then the bracket 200 needs to be rotated along the circumference of the installation shaft 300 so that the bracket 200 is abutted against the limit block 304 of the installation shaft 300, so that the bracket 200 is fixedly sleeved on the installation shaft 300. Then, the sealing cover 120 of the box body 100 is opened, and the installation shaft 300 sleeved with the bracket 200 is connected to the sealing cover 120 or connected to the inner wall of the box body 110. Afterwards, when performing this step, the pull wire 70 is sequentially passed through the first wire hole 111, the threading hole 301, the bracket hole 201, and the second wire hole 112, so that the pull wire 70 is bent and passed through the box body 100 along the wire passage. After the passing is completed, the sealing cover 120 is covered to complete the passing of the pull wire 70.

[0073] In the second step, the pull wire 70 is pulled back and forth so that the pull wire 70 and the periphery of the bracket hole 201 rub against each other back and forth.

[0074] Specifically, this step includes the following steps:

[0075] First, the box 100 is laid flat with the first wire hole 111 facing downward, and connected to the fixing portion 500 of the test device 10 through a vise, so that the test device 10 is fixed by the vise. If it is necessary to observe the fiber shedding of the pull wire 70, liquid needs to be contained in the box 100 in this step.

[0076] Then, a counterweight block is connected to one end of the pull wire 70 close to the first wire hole 111 . The counterweight block may have a certain weight. A power source is connected to one end of the pull wire 70 close to the second wire hole 112 .

[0077] Afterwards, the power source is started to pull the pull wire 70 to move back and forth relative to the box 100, so that the pull wire 70 contacts and rubs back and forth with the bracket hole 201 of the bracket 200, thereby testing the friction performance of the pull wire 70 in this way.

[0078] The third step is to evaluate the friction performance of the pull wire 70. In this step, after the pull wire 70 has been rubbed back and forth with the stent 200, the friction performance of the pull wire 70 is evaluated by observing whether the pull wire 70 is fuzzy or whether there are fibers falling off in the box 100. If the pull wire 70 is severely worn or there are too many fibers falling off, it means that the pull wire 70 received for testing is unqualified and cannot be used in the wire control of the self-expandable valve prosthesis, otherwise it is easy to cause thrombosis or obstruction in the patient's body.

[0079] Specifically, during observation, if it is necessary to observe the shedding of fibers in the box body 100, the mounting shaft 300 can be removed from the box body 100 to lower the liquid level in the box body 100, and then strong light and a magnifying glass can be used to observe the liquid in the box body 100 or the wear of the pull wire 70 can be directly observed, so as to evaluate whether the friction performance of the pull wire 70 is qualified.

[0080] It can be seen that the friction performance testing device 10 provided by the present application has a simple structure and can be used after simple installation. When using the testing device 10 provided by the present application for detection, on the one hand, since the friction test of the pull wire 70 is carried out in a sealed space, the free range of the falling fiber can be limited, and after the installation shaft 300 is removed from the box 100, the liquid level will also drop significantly, thereby reducing the workload of visual inspection or inspection using a magnifying instrument, and then quickly completing the evaluation and testing of the friction performance of the fiber, so as to quickly screen the quality of the pull wire 70, so as to reduce the possibility of thrombosis or obstruction in the patient's body due to unqualified friction performance of the pull wire 70 during interventional treatment. On the other hand, the testing device 10 is both a testing tool and a testing vessel, thereby simplifying the transition steps between testing and result observation. After the friction test, the result can be directly observed using an amplifying device without replacing the vessel. In particular, when the pull wire 70 needs to be rubbed more times to further test the friction performance of the pull wire 70, it is sufficient to continue testing on the original testing device 10. It is easy to use and can better highlight the advantages of using the testing device 10 for testing.

[0081] Finally, it should be noted that the various technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A wire friction performance testing device, characterized in that: include: The box body has a receiving cavity, and the outer wall of the box body is provided with a first wire passing hole and a second wire passing hole communicating with the receiving cavity; A bracket is arranged in the accommodating cavity, and the bracket is provided with a bracket hole penetrating the bracket. The first wire passing hole, the bracket hole and the second wire passing hole are configured to jointly define a tortuous wire passing channel for the pull wire to pass through.

2. The wire friction performance testing device according to claim 1, characterized in that: The box body includes a box body and a sealing cover, the accommodating cavity is opened in the box body, one side of the box body has an opening connected to the accommodating cavity, and the sealing cover can be openably connected to the box body to close the opening of the accommodating cavity, so that the accommodating cavity is a closed setting.

3. The wire friction performance testing device according to claim 1, characterized in that: A mounting shaft is provided in the box body, and the mounting shaft is detachably connected to the inner wall of the box body. The bracket is fixedly arranged on the mounting shaft. A threading hole penetrating the mounting shaft is provided on the side wall of the mounting shaft. The threading hole is connected to the bracket hole so that the pull wire can pass through the bracket hole and the threading hole in the box body in sequence.

4. The wire friction performance testing device according to claim 3, characterized in that: One of the inner wall of the box body and the end of the mounting shaft is provided with a positioning column, and the other is correspondingly provided with a positioning hole, and the positioning column is pluggably inserted into the positioning hole; Alternatively, a slide groove is provided on the inner wall of the box body, and a slider is provided on the end of the mounting shaft, and the slider can be slidably limited in the slide groove.

5. The wire friction performance testing device according to claim 3, characterized in that: The bracket is mesh-shaped and sleeved on the outer circumference of the installation shaft. The outer circumference of the installation shaft is provided with a limit block, which passes through the mesh of the bracket and abuts against the bracket to limit the relative movement of the bracket along the circumferential direction of the installation shaft.

6. The wire friction performance testing device according to claim 1, characterized in that: The first wire passing hole and the second wire passing hole are respectively opened on two adjacent side walls of the box body, and / or the first wire passing hole, the bracket hole and the second wire passing hole are equidistant from the bottom wall of the box body.

7. The wire friction performance testing device according to claim 1, characterized in that: The wire pulling friction performance testing device also includes two sealing plugs, which are respectively inserted into the first wire passing hole and the second wire passing hole in an interference fit to seal the first wire passing hole and the second wire passing hole respectively. Each sealing plug is provided with a valve opening running through its two opposite axial ends, and the valve opening is used for the wire pulling hole to pass through.

8. The wire friction performance testing device according to claim 7, characterized in that: Each sealing plug is provided with a sealing film at one end facing the box body, the sealing film closes one end of the valve opening facing the accommodating cavity, and the sealing film is configured to be pierced by the pull wire to pass through the valve opening.

9. The wire friction performance testing device according to claim 7, characterized in that: The outer circumferential surface of each sealing plug is provided with a first limiting ring and a second limiting ring surrounding its own central axis, the first limiting ring and the second limiting ring are arranged at intervals along the axial direction of the sealing plug, the first limiting ring abuts against the outer wall of the box body, and the second limiting ring abuts against the inner wall of the box body.

10. The wire friction performance testing device according to claim 1, characterized in that: The outer wall of the box body is provided with a fixing portion, and the fixing portion is used to be connected with a vise so that the box body is fixed by the vise.

11. A method for testing the friction performance of a wire, characterized in that: The method for testing the friction performance of a wire is implemented by using the wire pulling friction performance testing device as described in any one of claims 1 to 10, and the wire pulling friction performance testing method comprises the following steps: Pass the pull wire through the first wire hole, the bracket hole and the second wire hole in sequence, so that the pull wire is bent and passed through the box along the wire passage; Pulling the pull wire back and forth so that the pull wire and the periphery of the bracket hole rub against each other back and forth; The friction properties of the cables were evaluated.

12. The method for testing the friction performance of a wire drawing according to claim 11, characterized in that: The step of reciprocatingly pulling the pull wire so that the pull wire and the periphery of the bracket hole rub against each other reciprocally includes: Lay the box flat with the first cable hole facing downward; A counterweight is connected to one end of the pull wire near the first wire hole, and a power source is connected to one end of the pull wire near the second wire hole; The power source is started to make the power source pull the pull wire to move back and forth relative to the box.

13. The method for testing the friction performance of a wire drawing according to claim 11, characterized in that: The evaluation of the friction performance of the pull wire includes observing whether the pull wire is fuzzy or observing whether there are detached fibers in the box.

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