A catheter torsion testing mechanism

Abstract

This utility model relates to the field of catheter testing technology and discloses a catheter torsion testing mechanism, including a base with a first stand and a second stand fixed to one end of its upper surface, parallel to the first stand and movable in a direction close to or away from the first stand, a locking member and a connecting member. Both the first stand and the second stand are equipped with connecting members for connecting the end of the catheter. The connecting member on the second stand is rotatable. The locking member can be sleeved on the outside of the catheter and is used to lock the end of the catheter. The inner wall of the locking ring of this utility model has a gradually changing thickness of the inner convex strip, which, together with the hinge strip with a spring in the connecting member, can squeeze the hinge strip through the inner convex strip when locking, and use the elastic force of the spring to firmly press the end of the catheter. The anti-slip ridges on the inner convex strip and the hinge strip can increase the friction and prevent the catheter from loosening during torsion.

Description

Technical Field

[0001] This utility model relates to the field of catheter testing technology, and in particular to a catheter torsion testing mechanism. Background Technology

[0002] In the field of infusion set catheter production and application, the torsion performance of the catheter is one of the important indicators for measuring its quality and reliability. Catheters in medical devices need to withstand certain torsion operations in scenarios such as minimally invasive surgery without breaking or leaking. Therefore, accurate testing of catheter torsion is a key link to ensure its safe use.

[0003] Currently, existing catheter torsion testing devices on the market have certain shortcomings in practical applications. For example, catheters of different specifications (diameter, length) require special fixing fixtures, and the process of changing the fixtures is cumbersome, which increases the testing cost and time and reduces the testing efficiency. Secondly, there is a lack of simple overload protection mechanisms. When the torque that the catheter is subjected to during torsion exceeds its limit strength, the device cannot stop the operation in time, which can easily lead to catheter breakage or damage. Utility Model Content

[0004] This invention proposes a catheter torsion testing mechanism to solve the problem that existing catheters of different specifications require special fixing clamps, and the clamp replacement process is cumbersome.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a catheter torsion testing mechanism, comprising:

[0006] The base has the first upright fixed to one end of its upper surface;

[0007] The second support is parallel to the first support, and the second support can move in a direction that is closer to or farther away from the first support;

[0008] The first and second supports are equipped with connectors for connecting the end of the conduit. The connector on the second support is rotatable. The locking component can be sleeved on the outside of the conduit and is used to lock the end of the conduit.

[0009] Preferably, the locking member includes a locking ring, the outer wall of which is fixed with a plurality of outward protruding strips in a ring array, and the inner wall of which is fixed with a plurality of inward protruding strips in a ring array, the thickness of the inward protruding strips being gradually increased from one end to the other.

[0010] Preferably, the connector includes a connecting cylinder with one end open, a protruding post fixed at the center of the connecting cylinder, and the inner diameter of the locking ring is larger than the diameter of the protruding post.

[0011] Preferably, the outer wall of the protruding post is provided with a plurality of locking grooves in a ring array, and a hinge strip is hinged inside the locking groove, and a spring is connected between the hinge strip and the bottom of the locking groove.

[0012] Preferably, a lead screw is installed on the upper surface of the base, and a nut seat is installed on the outside of the lead screw, with the second upright fixed to the upper surface of the nut seat.

[0013] Preferred options also include:

[0014] An industrial camera, which is mounted on a first stand via a connecting bracket;

[0015] The motor's output end is connected to the connector on the second stand;

[0016] The torque sensor is embedded in a protrusion on the second stand.

[0017] Preferably, the upper end face of the second stand is provided with a placement groove for placing the locking ring.

[0018] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0019] (1) The thickness of the inner convex strip on the inner wall of the locking ring of this utility model gradually changes. When it is locked, the inner convex strip can squeeze the hinge strip and use the elastic force of the spring to firmly press the end of the guide tube. The anti-slip convex texture on the inner convex strip and the hinge strip can increase the friction and prevent the guide tube from loosening during twisting. By adjusting the position of the locking ring and the degree of pressing of the inner convex strip and the hinge strip, it can adapt to guide tubes of different diameters and improve the versatility of the mechanism.

[0020] (2) The torque sensor is linked with the control system. When the torque exceeds the safety threshold, the motor can be immediately stopped and the second stand can be moved in the opposite direction to avoid damage to the guide tube due to overload, thus ensuring the safety of the test process and the accuracy of the data. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a front view of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the locking component and the connecting component of this utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the locking component and the connecting component of this utility model;

[0026] Figure 5 This utility model Figure 4 Enlarged view of point A in the image;

[0027] In the diagram: 1. Base; 2. Lead screw; 3. First support; 4. Nut seat; 5. Industrial camera; 6. Second support; 61. Placement slot;

[0028] 7. Locking component; 71. Locking ring; 72. Inner convex strip; 73. Outer convex strip;

[0029] 8. Connecting parts; 81. Connecting cylinder; 82. Protruding post; 83. Locking groove; 84. Hinge strip; 85. Spring;

[0030] 9. Motor; 10. Torque sensor. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figures 1-5 As shown, a conduit torsion testing mechanism includes a base 1, a second stand 6, a locking member 7, and a connecting member 8. A first stand 3 is fixed to one end of the upper surface of the base 1. The second stand 6 is parallel to the first stand 3 and can move towards or away from the first stand 3. A lead screw 2 is installed on the upper surface of the base 1. The lead screw 2 is a high-precision ball screw. A nut seat 4 is installed on the outside of the lead screw 2. The nut seat 4 is made of wear-resistant cast iron and has a polytetrafluoroethylene wear-resistant layer embedded inside to reduce friction loss between it and the lead screw 2 and improve its service life. A drive motor is installed at one end of the lead screw 2. The second stand 6 is fixed to the upper surface of the nut seat 4. Connecting members 8 are installed on both the first stand 3 and the second stand 6. The connecting members 8 are used to connect the end of the conduit. The connecting member 8 on the second stand 6 is rotatable. The locking member 7 can be sleeved on the outside of the conduit and is used to lock the end of the conduit. One connecting member 8 corresponds to one locking member 7.

[0033] Also includes:

[0034] Industrial camera 5 is mounted on the first stand 3 via a connecting bracket and is used to monitor changes in the outer wall of the conduit. Industrial camera 5 is a high-resolution industrial CCD camera with 5 million pixels and a frame rate of 30fps. It is mounted on the first stand 3 via a connecting bracket, which can be an adjustable structure (using existing common adjustable brackets) to enable the position adjustment of industrial camera 5 in the horizontal and vertical directions, ensuring that industrial camera 5 can be accurately aligned with the test area of ​​the conduit.

[0035] The motor 9 has its output end connected to the connector 8 on the second stand 6. The motor 9 is a geared motor, which drives the connector 8 to rotate.

[0036] The torque sensor 10 is a high-precision strain gauge torque sensor with a measurement range of 0-100 N·m, an accuracy class of 0.5, and a resolution of 0.01 N·m. It is embedded in the protrusion 82 on the second support 6 and forms a series structure with the connector 8 and the output end of the motor 9. It can monitor the torque value change of the conduit during the torsion process in real time and accurately. The torque sensor 10 is connected to the control system through a signal line. When the monitored torque value exceeds the preset safety threshold, the control system will immediately send a signal to control the motor 9 to stop rotating and at the same time control the drive motor 9 to drive the second support 6 to move in the opposite direction, thereby relieving the torsional force on the conduit and effectively preventing damage to the conduit due to overload.

[0037] Among them, see Figure 3 and Figure 4 As shown, the locking component 7 includes a locking ring 71. The outer wall of the locking ring 71 is fixed with a plurality of outward protruding strips 73 in a ring array, and the inner wall of the locking ring 71 is fixed with a plurality of inward protruding strips 72 in a ring array. The thickness of the inward protruding strips 72 gradually increases from one end to the other. In use, the locking ring 71 is first put on the outside of the tube to be tested. After the corresponding connectors 8 are inserted into both ends of the tube to be tested, the locking ring 71 can be moved to press the connection end.

[0038] See Figures 3-5 As shown, the connector 8 includes a connecting cylinder 81 with one end open. A protruding post 82 is fixed at the center of the connecting cylinder 81. The inner diameter of the locking ring 71 is larger than the diameter of the protruding post 82. The outer wall of the protruding post 82 is provided with a plurality of locking grooves 83 in a ring array. A hinge strip 84 is hinged inside the locking groove 83. A spring 85 is connected between the hinge strip 84 and the bottom of the locking groove 83.

[0039] As described above, during use, first insert both ends of the conduit to be tested into the connecting cylinder 81, and then place it over the outside of the protruding post 82. Next, move the locking ring 71 so that the inner protruding strip 72 is inserted along the locking groove 83. The inner protruding strip 72 presses against the hinge strip 84. Through the action of the spring 85, the inner protruding strip 72 and the hinge strip 84 can be used to press the end of the conduit. Then, use the lead screw 2 to move the nut seat 4 to pull the conduit to be tested horizontal. Afterward, start the motor 9, and use the output end of the motor 9 to drive the connecting cylinder 81 to rotate, thus achieving the twisting of the conduit. The twisting situation is monitored in real time by the industrial camera 5. The industrial camera 5 will transmit each captured detection image to the matching display screen (not shown) in real time via the data transmission line. The operator can intuitively observe the entire process of conduit twisting on the display screen and promptly grasp the status of the conduit. If any non-standard conditions are found during the twisting process, such as obvious damage when twisted to a certain extent, the operator can stop the operation of the motor 9 in time according to the feedback information on the display screen to avoid further damage to the conduit, so as to analyze and record the test results.

[0040] To increase friction, anti-slip ridges can be provided on the inner convex strip 72 and the hinge strip 84.

[0041] In addition, see Figure 1 As shown, the upper surface of the second stand 6 is provided with a placement groove 61 for placing the locking ring 71. When not in use, the locking ring 71 can be placed in the placement groove 61 for easy access later.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A catheter tortuosity testing mechanism, characterized by, include: The base (1) has a first upright (3) fixed to one end of its upper surface; The second stand (6) is parallel to the first stand (3), and the second stand (6) can move in a direction that is closer to or farther away from the first stand (3); Locking member (7) and connecting member (8) are provided. The first stand (3) and the second stand (6) are both equipped with connecting member (8) for connecting the end of the conduit. The connecting member (8) on the second stand (6) is rotatable. The locking member (7) can be sleeved on the outside of the conduit and is used to lock the end of the conduit.

2. A catheter tortuosity testing mechanism according to claim 1, wherein: The locking member (7) includes a locking ring (71). The outer wall of the locking ring (71) is fixed with a plurality of outward protruding strips (73) in a ring array. The inner wall of the locking ring (71) is fixed with a plurality of inward protruding strips (72) in a ring array. The thickness of the inward protruding strips (72) gradually increases from one end to the other end.

3. A catheter tortuosity testing mechanism according to claim 2, wherein: The connector (8) includes a connecting cylinder (81) with one end open. A protrusion (82) is fixed at the center of the inner part of the connecting cylinder (81). The inner diameter of the locking ring (71) is larger than the diameter of the protrusion (82).

4. A catheter tortuosity testing mechanism according to claim 3, wherein: The outer wall of the protruding post (82) is provided with a plurality of locking grooves (83) in a ring array. A hinge strip (84) is hinged inside the locking groove (83), and a spring (85) is connected between the hinge strip (84) and the bottom of the locking groove (83).

5. The catheter tortuosity testing mechanism of claim 1, wherein: A lead screw (2) is installed on the upper surface of the base (1), and a nut seat (4) is installed on the outside of the lead screw (2). The second stand (6) is fixed on the upper surface of the nut seat (4).

6. A catheter tortuosity testing mechanism according to claim 3, wherein: Also includes: An industrial camera (5) is mounted on a first stand (3) via a connecting bracket; The motor (9) has its output end connected to the connector (8) on the second stand (6); The torque sensor (10) is embedded in the protrusion (82) on the second stand (6).

7. The catheter tortuosity testing mechanism of claim 2, wherein: The upper end face of the second stand (6) is provided with a placement groove (61) for placing the locking ring (71).

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