Catheter bending testing device

Abstract

The utility model discloses a conduit bending test device, and relates to the technical field of cables. The guide pipe comprises a supporting frame, a fixing module and a cam, the fixing module is slidably connected with the supporting frame in a matched mode and can move along a first axis relative to the supporting frame to adjust the position, one end of the guide pipe is rotationally connected with the fixing module, and the rotation axis is a second axis; the cam comprises at least two arc surfaces which are concentrically arranged, the arc surfaces are used for abutting against the guide pipe so that the guide pipe can be bent, the radiuses of the at least two arc surfaces are different, the central angle corresponding to each arc surface is larger than or equal to 85 degrees, and the cam is arranged on the supporting frame and can rotate around a third axis so as to adjust the angle. The first axis, the second axis and the third axis are perpendicular to one another. The arc surfaces with different diameters are arranged on the cam which is rotatably connected with the support frame, so that one cam corresponds to bending tests of conduits with different sizes, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bendable catheter testing, in particular to a catheter bending testing device. Background Art

[0002] The standard numbered GB / T 20041.22-2009 specifies in detail the special requirements for bendable conduit systems. When performing a bending test on a conduit, one end of the conduit needs to be fixed vertically, and the other end is bent to the left or right alternately to (90±5)°, and the 90° bending of the conduit is achieved by squeezing the conduit onto the outer circumference of a disc. At the same time, the standard specifies the radius size of the disc corresponding to different diameters and different types of conduits. For example, the disc sizes corresponding to the same diameter of a flat conduit and a corrugated tube are different.

[0003] At present, the size of the disc of the bending test device is fixed, and each disc can only test a catheter of one diameter size. Therefore, it is necessary to prepare multiple discs of different sizes to perform bending tests on catheters of different sizes and types. The large number of discs makes storage inconvenient, which also leads to a high cost of the bending test device.

[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0005] The utility model aims to provide a catheter bending test device, which can meet the bending test of catheters with different diameters.

[0006] In order to achieve the above-mentioned utility model object, the utility model proposes a catheter bending test device, which includes:

[0007] Support frame;

[0008] A fixing module is slidably connected with the support frame and can move relative to the support frame along the first axis to adjust the position. One end of the catheter is rotatably connected to the fixing module, and the rotation axis is the second axis; and

[0009] The cam comprises at least two concentrically arranged arc surfaces, wherein the arc surfaces are used to abut against the catheter to bend the catheter, the radii of at least two of the arc surfaces are different, and the central angle corresponding to each of the arc surfaces is greater than or equal to 85°, the cam is arranged on the support frame, and the cam can rotate around a third axis to adjust the angle, and the first axis, the second axis and the third axis are perpendicular to each other.

[0010] Furthermore, the cam is provided with two or three arc surfaces, and the central angle corresponding to each of the arc surfaces is the same, and the radius corresponding to each arc surface is different;

[0011] The central angle is greater than or equal to 90°.

[0012] Furthermore, the arc surface is correspondingly provided with a guiding surface tangent thereto.

[0013] Furthermore, the support frame includes a bottom plate and a side plate vertically arranged on the bottom plate, the fixing module is arranged on the bottom plate, and the cam is arranged on the side plate and is detachably connected to the side plate.

[0014] Furthermore, the side plate is provided with an outwardly protruding rotating shaft and a first fixing hole located outside the rotating shaft, the cam includes a first rotating shaft hole adapted to the rotating shaft and a second fixing hole located outside the first rotating shaft hole, the number of at least one of the first fixing hole and the second fixing hole is multiple and evenly distributed with the axis of the rotating shaft as the center, the first fixing hole and the second fixing hole are at an equal distance from the axis of the rotating shaft, and the cam is fixed to the side plate by fasteners passing through the first fixing hole and the second fixing hole.

[0015] Furthermore, the support frame is provided with a slide groove extending along the first axis, the fixing module includes a fixing member and a clamping member, the fixing member includes a column inserted into the slide groove and a first abutment provided at one end of the column, the clamping member is threadedly connected to the column, and the base plate of the support frame is clamped by the clamping member and the first abutment to fix the position of the fixing module.

[0016] Furthermore, the fixing module includes a plurality of connectors detachably connected to the column, and the plurality of connectors have different outer diameters to adapt to catheters with different inner diameters.

[0017] Furthermore, the fixing module includes a plurality of connecting rings detachably connected to the column;

[0018] The inner diameters of the plurality of connecting rings are different so as to adapt to the catheters with different outer diameters; and / or the outer diameters of the plurality of connecting rings are different so as to adapt to the catheters with different inner diameters.

[0019] Furthermore, the fixing module includes a fixing ring rotatably connected to the column, the fixing ring is provided with a slit connecting its inner and outer surfaces, the fixing module also includes bolts connecting the parts of the fixing ring located on both sides of the slit, the end of the catheter is arranged in the fixing ring, and the catheter is clamped by the fixing ring.

[0020] Further, the catheter bending test device comprises a plurality of cams arranged at intervals along the first axis, and the radii of the arc surfaces of the plurality of cams are different;

[0021] The number of the fixing module is one, the plurality of cams are located on the same side of the fixing module, and the fixing module can be moved to a position corresponding to each of the cams; or,

[0022] The number of the fixing modules corresponds to the number of the cams, each cam is correspondingly provided with a fixing module, each fixing module is correspondingly provided with a sliding groove, or all the fixing modules share one sliding groove.

[0023] Further, the heights of the highest points of all the cam positions after adjustment are the same; and / or,

[0024] The side plate is provided with a rotating shaft slidably matched therewith, the rotating shaft can move along a third axis relative to the side plate to adjust the position, and the cam is connected to the rotating shaft.

[0025] Compared with the prior art, the utility model has the following beneficial effects: the catheter bending test device comprises a support frame, a fixing module and a cam, one end of the catheter is fixed by the fixing module, arc surfaces of different diameters are arranged on the cam, and the cam can be rotated to select the arc surface of the corresponding catheter size according to the size of the catheter, and the fixing module is moved so that one side of the catheter is tangent to the corresponding arc surface, and the catheter is rotatably connected to the fixing module, and can be rotated 180° to perform the bending test on the other side after the bending test on one side is completed; the catheter bending measuring device can perform bending tests on more catheters of different sizes through one cam through the above-designed structure, thereby improving efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a catheter bending test device in one embodiment of the utility model.

[0027] Figure 2 yes Figure 1 Exploded view of the catheter bend test setup shown.

[0028] Figure 3 yes Figure 1 A front view of a catheter bending test apparatus is shown, wherein the upper end of the catheter is bent.

[0029] Figure 4 yes Figure 3 Schematic diagram of the central catheter after rotation 180°.

[0030] Figure 5 It is a schematic diagram of a cam in an embodiment of the utility model. In the figure, the cam includes two arc surfaces.

[0031] Figure 6 yes Figure 5 A front view of the cam is shown.

[0032] Figure 7 yes Figure 1 A cross-sectional view of the catheter bend test apparatus is shown.

[0033] Figure 8 The utility model is a schematic diagram of a cam of a catheter bending test device in one embodiment of the utility model. In the figure, the cam includes three arc surfaces.

[0034] Fig. 9 yes Figure 8 A front view of the cam is shown.

[0035] Fig.10 It is a schematic diagram of a connector of a catheter bending test device in one embodiment of the utility model.

[0036] Fig.11 It is a schematic diagram of a connecting ring of a catheter bending test device in one embodiment of the utility model.

[0037] Fig.12 It is a schematic diagram of a fixing ring of a catheter bending test device in one embodiment of the utility model.

[0038] Fig.13 It is a cross-sectional view of a fixing module in an embodiment of the utility model. In the figure, the fixing module includes a fixing ring.

[0039] Fig.14 It is a cross-sectional view of a fixing module in an embodiment of the utility model. In the figure, the fixing module includes a connecting ring.

[0040] Fig.15 It is a schematic diagram of a catheter bending test device in an embodiment of the utility model. In the figure, the catheter bending test device includes three cams.

[0041] Fig.16 yes Fig.15 Exploded view of the catheter bend test setup shown.

[0042] Fig.17 yes Fig.15 A cross-sectional view of the catheter bend test apparatus is shown.

[0043] Fig.18 It is a schematic diagram of a catheter bending test device in an embodiment of the utility model. In the figure, each cam is correspondingly provided with a fixing module.

[0044] Fig.19 It is a schematic diagram of a catheter bending test device in an embodiment of the utility model. In the figure, each fixing module is correspondingly provided with a slide groove.

[0045] Fig. 20It is a top view of a catheter bending test device according to an embodiment of the present invention.

[0046] Fig.21 yes Fig. 20 A top view of the catheter bend test apparatus shown with the two right cams moved close to the side plates.

[0047] Fig. 22 yes Fig. 20 A cross-sectional view of the catheter bend test apparatus is shown. DETAILED DESCRIPTION

[0048] 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. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] like Figures 1 to 3 As shown, a catheter bending test device corresponding to a preferred embodiment of the utility model includes a support frame 1, a fixing module 2 and a cam 3.

[0052] The support frame 1 plays a supporting role in the catheter bending test device, and can be made of hard materials such as hard plastic or metal, for example.

[0053] The fixed module 2 is slidably coupled to the support frame 1, and can be moved relative to the support frame 1 along the first axis 1a to adjust the position, and the first axis 1a is parallel to the X axis. In addition, in the bending test, both sides of the catheter 4 need to be bent. One end of the catheter 4 is rotatably connected to the fixed module 2. After one side of the catheter 4 is bent, it can be conveniently rotated 180° to test the corresponding other side. The rotation axis of the catheter 4 is the second axis 2a, which is consistent with the central axis of its fixed end, and the second axis 2a is parallel to the Z axis.

[0054] The cam 3 includes at least two concentrically arranged arc surfaces. Before bending, since the fixing module 2 and the bracket 1 are slidably matched, the position of the fixing module 2 can be moved so that the side of the catheter 4 close to the cam 3 is tangent to the arc surface of the cam 3. During the bending process, the arc surface is used to press against the catheter 4 to bend the catheter 4. Figure 3 When the upper end of the conduit 4 is bent to a horizontal state, it indicates that it has been bent to the angle range of 90±5° required by the standard.

[0055] According to the inspection standard, for different sizes and types of the catheter 4, the radius of the arc surface required in the bending test is also different. In order to improve the measurement efficiency and reduce the cost, the cam 3 includes at least two arc surfaces with different radii. The arc surfaces with different radii can test catheters 4 of different sizes, thereby greatly reducing the number of cams 3 required. Further, the center angle corresponding to each arc surface is greater than or equal to 85°, which can meet the angle requirement of bending the catheter 4 during the test; further, the center angle corresponding to each arc surface is greater than or equal to 90°.

[0056] Furthermore, the cam 3 is arranged on the support frame 1, and the cam 3 can rotate around the third axis 1b to adjust the angle, so as to facilitate the selection of an arc surface with a suitable radius on the cam 3 for testing according to the size of the catheter 4. The third axis 1b is parallel to the Y axis, and the first axis 1a, the second axis 2a and the third axis 1b are perpendicular to each other.

[0057] When testing, refer to Figure 1 First, select the arc surface corresponding to the catheter 4 and rotate it to the side where the catheter 4 is located, then move the fixing module 2 so that the right side of the catheter 4 is against the arc surface, and then bend the upper end of the catheter 4 to fit it on the arc surface until it is horizontal. Figure 3 Then the catheter 4 is rotated 180° around the second axis 2a to achieve Figure 4 The catheter 4 is moved to the position shown in the figure, and then the upper end of the catheter 4 is bent to the right to a horizontal state. The catheter 4 is bent repeatedly in this way to complete the test.

[0058] One end of the catheter 4 is fixed by the fixing module 2, and arc surfaces of different diameters are arranged on the cam 3. According to the size of the catheter 4, the arc surface of the size corresponding to the catheter 4 can be selected for testing by rotating the cam 3. During the test, the fixing module 2 is moved so that one side of the catheter 4 is tangent to the corresponding arc surface, and the catheter 4 is rotatably connected to the fixing module 2. After the bending test on one side is completed, the catheter 4 can be rotated 180° to test the bending of the other side. The catheter bending test device can meet the bending test requirements of catheters 4 of various sizes through one cam 3 through the above-designed structure, thereby reducing the number of times the cam 3 is disassembled and assembled, improving efficiency and reducing costs.

[0059] The central angles of the arc surfaces on the cam 3 may be the same or different, and the radii of at least two arc surfaces are different. Preferably, the radius of each arc surface is different so as to be used for testing catheters 4 of more different sizes.

[0060] Optionally, the cam 3 is provided with two or three arc surfaces. Figure 5 and Figure 6 In the illustrated embodiment, there are two arc surfaces, namely a first arc surface 33 and a second arc surface 35 , with corresponding central angles a4 and a5 . The radii r4 and r5 of the two arc surfaces are different, and the central angles a4 and a5 are also different.

[0061] exist Figure 8 and Fig. 9 In the embodiment shown, the cam 3 is provided with three arc surfaces, namely a third arc surface 36, a fourth arc surface 37 and a fifth arc surface 38, with corresponding central angles a1, a2 and a3. The radii r1, r2 and r3 of the three arc surfaces in the figure are different, and the central angles a1, a2 and a3 are all equal to 90°.

[0062] In some embodiments, the arc surface is provided with a guide surface 34 tangent thereto, and the guide surface 34 is planar, which can conveniently limit the position of the catheter 4 so that the portion thereof abutting against the guide surface 34 is in a vertical state. Figure 5 and Figure 6 In the illustrated embodiment, the second arc surface 35 is provided with a guide surface 34 corresponding thereto. Figure 8 and Fig. 9 In the embodiment shown, each arc surface is provided with a guide surface 34 tangent thereto. During the bending test, the guide surface 34 is vertically arranged (perpendicular to the first axis 1a), and the catheter 4 is in contact with the guide surface 34 (e.g. Figure 3 As shown), when the other end is bent to be parallel to the first axis 1a, the catheter 4 can be reliably bent to meet the bending standard requirement of 90±5°.

[0063] like Figure 1 and Figure 3As shown, the support frame 1 includes a bottom plate 10 and a side plate 11 vertically arranged on the bottom plate 10, a first axis 1a is parallel to the side plate 11, a second axis 2a is perpendicular to the bottom plate 10, and a third axis 1b is perpendicular to the side plate 11. The fixing module 2 is arranged on the bottom plate 10; the cam 3 is arranged on the side plate 11 and is detachably connected to the side plate 11, so that different cams 3 can be easily replaced, so that the catheter bending measurement device can measure catheters 4 of different sizes and types.

[0064] Furthermore, in order to realize that the cam 3 can rotate around the third rotating shaft 1b and can be fixed on the side plate 11 after rotating a certain angle, as shown in FIG. Figure 2 As shown, the side plate 11 is provided with an outwardly protruding shaft 110 and a first fixing hole 111 located outside the shaft 110. Figure 5 and Figure 6 As shown, the cam 3 includes a first shaft hole 32 adapted to the shaft 110 and a second fixing hole 30 located outside the first shaft hole 32, and a rotatable connection is achieved through the cooperation between the shaft 110 and the first shaft hole 32. Figure 2 In the embodiment shown, the rotating shaft 110 is integrally formed with the side plate 11; Fig.17 In the illustrated embodiment, the rotating shaft 110 is fixed to the side plate 11 by screws.

[0065] The number of at least one of the first fixing hole 111 and the second fixing hole 30 is multiple and evenly distributed around the axis of the rotating shaft 110; the first fixing hole 111 and the second fixing hole 30 are equidistant from the axis of the rotating shaft 110, and the cam 3 is fixed to the side plate 11 by passing the fastener 31 through the first fixing hole 111 and the second fixing hole 30, so that the cam 3 can be fixed after rotating to replace the arc surface of different radius, thereby ensuring the stability of the cam 3 in the bending test of the catheter 4.

[0066] like Figure 2 , Figure 5 and Figure 6 and Figure 7 As shown, the cam 3 with two arc surfaces is provided with two second fixing holes 30, the line connecting the centers of the two second fixing holes 30 and the center of the cam 3 is perpendicular to the guide surface 34, and the two second fixing holes 30 are equidistant from the center of the cam 3. Obviously, in other embodiments, the line connecting the centers of the two second fixing holes 30 and the center of the cam 3 can also be set to be parallel to the guide surface 34, and the number of the second fixing holes 30 can also be more, for example, four. Figure 2As shown, a first fixing hole 111 is provided at a position corresponding to the side plate 1 and the cam 3, and the first fixing hole 111 and the second fixing hole 30 are at the same distance from the axis of the rotating shaft 110, and the first fixing hole 111 is arranged horizontally with the axis of the rotating shaft 110. It can be understood that whenever the cam 3 is rotated so that different second fixing holes 30 are arranged corresponding to the first fixing hole 111, the arc surface of the cam 3 with different radii faces the conduit 4, and the conduit 4 can be bent using the arc surface.

[0067] like Figure 8 and Fig. 9 As shown, the cam 3 with three arc surfaces is provided with three second fixing holes 30, and the connecting lines of the centers of the three second fixing holes 30 and the center of the cam 3 are respectively perpendicular to the three guide surfaces 34, and the distances between the three second fixing holes 30 and the center of the cam 3 are all equal. In this way, when the cam 3 is rotated until its second fixing holes 30 and the first fixing holes 111 are aligned, the guide surface 34 corresponding to the arc surface for bending is also rotated to a vertical setting, so that the bending test can be conveniently performed.

[0068] Optionally, the fastener 31 is a bolt, and the first fixing hole 111 is a threaded hole; or, the fastener 31 is a fixing pin, and the first fixing hole 111 and the second fixing hole 30 are pin holes.

[0069] like Figure 1 As shown, the support frame 1 is provided with a slide groove 100 extending along the first axis 1a, and the fixing module 2 includes a fixing member 20 and a clamping member 21. The fixing member 20 includes a column 200 inserted in the slide groove 100 and a first abutment portion 201 provided at one end of the column. The clamping member 21 is threadedly connected with the column 200, and the bottom plate 10 of the support frame 1 is clamped by the clamping member 21 and the first abutment portion 201 to fix the position of the fixing module 2. As an example, the clamping member 21 is a nut, the fixing member 20 is a bolt, and the column 200 is provided with an external thread adapted to the clamping member 21. The position of the fixing module 2 can be adjusted by loosening the clamping member 21, and the fixing module 2 can be fixed at the current position by tightening the clamping member 21, so as to facilitate the adjustment of the catheter 4 to be tangent to the arc surface used for the bending test.

[0070] It is understandable that in order to ensure that one side of the conduit 4 can be tangent to the selected arc surface during the movement of the fixing module 2, the length of the slide groove 100 must be sufficient to ensure that one side of the conduit 4 can be tangent to the selected arc surface after the fixing module 2 is moved.

[0071] like Figure 2 and Fig.10As shown, in some embodiments, the fixing module 2 includes a plurality of connectors 22 detachably connected to the column 200, and the connectors 22 are provided with a limiting column 220 in contact with the inner surface of the conduit 4, and the limiting columns 220 of the plurality of connectors 22 have different outer diameters D1 to adapt to conduits 4 with different inner diameters. The connector 22 can be fixed to the fixing member 20 by, for example, a threaded connection, and the conduit 4 can be rotated by rotating the connector 22, or the conduit 4 can be rotated by rotating the conduit 4 so that it rotates relative to the limiting column 220, thereby facilitating the implementation of the bending test on both sides of the conduit 4.

[0072] In other embodiments, the fixing module 2 includes a plurality of connecting rings 23 detachably connected to the column 200, and the connecting rings 23 are provided with an outwardly protruding tube portion 230. Fig.11 As shown, the inner diameters D2 of the tubes 230 of the multiple connecting rings 23 are different to adapt to the catheters 4 with different outer diameters. Alternatively, the outer diameters D3 of the multiple connecting rings 23 are different to adapt to the catheters 4 with different inner diameters. By selectively using the inner surface or outer surface of the tube 230 to limit the catheter 4, more catheters 4 of different sizes can be accommodated.

[0073] like Fig.12 , Fig.13 and Fig.16 As shown, in another embodiment, the fixing module 2 includes a fixing ring 24 rotatably connected to the column 200, and the fixing ring 24 is provided with a slit 240 connecting the inner and outer surfaces thereof. The fixing module 2 also includes bolts 25 connecting the fixing ring 24 and located on both sides of the slit 240. One end of the conduit 4 is disposed in the fixing ring 24. By rotating the bolts 25, the size of the aperture D4 of the fixing ring 24 can be adjusted, so that the fixing ring 24 can clamp the conduit 4 located therein.

[0074] The fixing ring 24 and the fixing member 20 can be connected to each other by screw thread; or Fig.13 As shown, the fixing ring 24 is rotatably connected to the fixing member 20 via a pressure cap 26. The pressure cap 26 is provided with a threaded portion 260 threadedly connected to the column 200, a cover portion 261 located in the fixing ring 24 and abutting against a step 241 in the fixing ring 24, and a shaft portion 262 connected between the cover portion 261 and the threaded portion 260. The fixing ring 24 is matched with the shaft portion 262, and the position in the axial direction is limited by the cover portion 261 and the column 200. The rotation of the catheter 4 is achieved by rotating the fixing member 24.

[0075] Similarly, the connecting ring 23 and the fixing member 20 can be rotatably connected by threaded connection; or Fig.14 As shown, the connecting ring 23 and the fixing member 20 can also be rotatably connected via the pressing cover 26 .

[0076] In order to reduce the number of times the cam 3 is replaced, the catheter bending test device includes a plurality of cams 3 arranged at intervals along the first axis 1a. Optionally, the radii of the arc surfaces of the plurality of cams 3 are different to make better use of each cam 3. The number of cams 3 and the radius of each arc surface can be selected according to actual conditions.

[0077] In one embodiment, if Figures 15 to 17 As shown, the catheter bending test device includes three cams 3, one fixing module 2, and one slide groove 100, which are correspondingly arranged below the three cams 3. The fixing module 2 can move along the slide groove 100 to the position corresponding to each cam 3 to test the catheter 4.

[0078] In another embodiment, the number of the fixing modules 2 corresponds to the number of the cams 3, and each cam 3 is provided with a fixing module 2. Fig.18 As shown, all the fixed modules 2 share a sliding groove 100; or Fig.19 As shown, each fixing module 2 is correspondingly provided with a sliding groove 100 .

[0079] In some embodiments, Figure 20 to Figure 22 As shown, in order to avoid the influence of other cams 3 on the catheter 4 during the bending test, the side plate 11 is provided with a rotating shaft 110 slidably matched therewith, and the cam 3 is connected to the rotating shaft 110. The rotating shaft 110 can move relative to the side plate 11 along the third axis 1b, so as to adjust the extension position of the cam 3. After selecting a suitable cam 3 according to the size of the catheter 4, the other cams 3 can be moved toward the side plate 11 to avoid the bending of the catheter 4, as shown in FIG. Fig.21 As shown, Fig.21 The state where the two cams 3 on the right side move to be close to the side plate 11 is shown. At this time, when the conduit 4 is bent by the cam 3 on the left side, the conduit 4 will not contact the two cams 3 on the right side.

[0080] In order to facilitate the movement and adjustment of the position of the cam 3 and the side plate 11 and the fixing of the rotating shaft 110, the side plate 11 is provided with a second rotating shaft hole 113 for the rotating shaft 110 to pass through, and the support frame 1 also includes a connecting pipe 12 coaxially arranged with the second rotating shaft hole 113, the connecting pipe 12 is connected to the side plate 11 through a flange, and is provided with a threaded hole 114 connected to the inner hole thereof, and the support frame 1 also includes a bolt 25 threadedly connected in the threaded hole 114, and the rotating shaft 110 is fixed by the bolt 25 abutting against the rotating shaft 110. After loosening the bolt 25, the position of the rotating shaft 110 along the axial direction can be adjusted, and the rotating shaft 110 can also be rotated to select a different arc surface.

[0081] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A catheter bending test device, characterized in that: include: Support frame (1); The fixing module (2) is slidably coupled to the support frame (1) and is capable of moving relative to the support frame (1) along a first axis (1a) to adjust its position; one end of the catheter (4) is rotatably connected to the fixing module (2), and the rotation axis is the second axis (2a); and The cam (3) comprises at least two concentrically arranged arc surfaces, the arc surfaces being used to abut against the conduit (4) to bend the conduit (4), the radii of at least two of the arc surfaces being different, and the central angle corresponding to each of the arc surfaces being greater than or equal to 85°, the cam (3) being arranged on the support frame (1), the cam (3) being able to rotate around a third axis (1b) to adjust an angle, and the first axis (1a), the second axis (2a) and the third axis (1b) being perpendicular to each other.

2. The catheter bending test device according to claim 1, characterized in that: The cam (3) is provided with two or three arc surfaces, and the central angle corresponding to each of the arc surfaces is the same, and the radius corresponding to each of the arc surfaces is different; The central angle is greater than or equal to 90°.

3. The catheter bending test device according to claim 2, characterized in that: The arc surface is correspondingly provided with a guide surface (34) tangent thereto, and the guide surface (34) is in a plane shape.

4. The catheter bending test device according to any one of claims 1 to 3, characterized in that: The support frame (1) comprises a base plate (10) and a side plate (11) vertically arranged on the base plate (10), the fixing module (2) is arranged on the base plate (10), and the cam (3) is arranged on the side plate (11) and is detachably connected to the side plate (11).

5. The catheter bending test device according to claim 4, characterized in that: The side plate (11) is provided with an outwardly protruding rotating shaft (110) and a first fixing hole (111) located outside the rotating shaft (110); the cam (3) comprises a first rotating shaft hole (32) adapted to the rotating shaft (110) and a second fixing hole (30) located outside the first rotating shaft hole (32); at least one of the first fixing hole (111) and the second fixing hole (30) is plural in number and evenly distributed around the axis of the rotating shaft (110); the first fixing hole (111) and the second fixing hole (30) are equidistant from the axis of the rotating shaft (110); and the cam (3) is fixed to the side plate (11) by a fastener (31) passing through the first fixing hole (111) and the second fixing hole (30).

6. The catheter bending test device according to claim 5, characterized in that: The support frame (1) is provided with a slide groove (100) extending along a first axis (1a); the fixing module (2) comprises a fixing member (20) and a clamping member (21); the fixing member (20) comprises a column (200) inserted into the slide groove (100) and a first abutting portion (201) provided at one end of the column (200); the clamping member (21) is threadedly connected to the column (200); the clamping member (21) and the first abutting portion (201) cooperate to clamp the bottom plate (10) of the support frame (1) to fix the position of the fixing module (2).

7. The catheter bending test device according to claim 6, characterized in that: The fixing module (2) comprises a plurality of connectors (22) detachably connected to the column (200), the connectors (22) being provided with outwardly protruding limiting columns (220), and the limiting columns (220) of the plurality of connectors (22) having different outer diameters so as to adapt to catheters (4) with different inner diameters.

8. The catheter bending test device according to claim 6, characterized in that: The fixing module (2) comprises a plurality of connection rings (23) detachably connected to the column (200); The inner diameters of the plurality of connecting rings (23) are different so as to adapt to the catheters (4) with different outer diameters; and / or the outer diameters of the plurality of connecting rings (23) are different so as to adapt to the catheters (4) with different inner diameters.

9. The catheter bending test device according to claim 6, characterized in that: The fixing module (2) comprises a fixing ring (24) rotatably connected to the column (200), the fixing ring (24) being provided with a slit (240) connecting the inner and outer surfaces thereof, the fixing module (2) further comprising bolts (25) connecting the parts of the fixing ring (24) located on both sides of the slit (240), the end of the conduit (4) being arranged in the fixing ring (24), and the conduit (4) being clamped by the fixing ring (24).

10. The catheter bending test device according to claim 6, characterized in that: The catheter bending test device comprises a plurality of cams (3) arranged at intervals along the first axis (1a), and the radii of the arc surfaces of the plurality of cams (3) are different; The number of the fixing module (2) is one, and the fixing module (2) can be moved to a position corresponding to each of the cams (3); or, The number of the fixing modules (2) corresponds to the number of the cams (3); each cam (3) is provided with a fixing module (2); each fixing module (2) is provided with a sliding groove (100); or all the fixing modules (2) share one sliding groove (100).

11. The catheter bending test device according to claim 10, characterized in that: The side plate (11) is provided with a rotating shaft (110) slidably matched therewith, and the rotating shaft (110) can move relative to the side plate (11) along a third axis (1b) to adjust its position, and the cam (3) is connected to the rotating shaft (110).

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