Stitch tensile property testing device

Abstract

The utility model relates to the technical field of suture testing, and discloses a suture tensile property testing device which comprises a testing table, a groove is formed in the upper surface of the testing table, a stepping motor is fixedly installed on one side of the testing table, a lead screw is rotationally connected to the interior of the groove, and one end of the lead screw is fixedly connected to the output end of the stepping motor. A graduated scale is arranged on the upper surface of the test board, a connecting block is in threaded connection with the exterior of the lead screw and slidably connected into the groove, and mounting frames are fixedly connected to one side of the upper surface of the connecting block and one side of the upper surface of the test board. In the tensile property test of the sewing thread, after the sewing thread is wound by using the wire spool, the outer part of the sewing thread is propped through the pressing plate, so that the clamping force is enhanced, and meanwhile, the friction force is further increased by using the extrusion block, so that the fastening force for clamping the sewing thread is favorably improved; the phenomenon of slippage caused by unstable clamping of the sewing thread in the test is effectively reduced, and the wire spool is convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of suture testing technology, and in particular to a suture tensile performance testing device. Background Technology

[0002] Sutures are threads used to close wounds or connect two or more pieces of tissue or material. They are commonly used in various situations such as surgery, clothing repair, and handicrafts. In daily life, sutures are also frequently used to repair clothing and make handicrafts. These sutures may be made of materials such as cotton, silk, and synthetic fibers. Different materials, colors, and thicknesses of sutures are selected according to specific needs. For sutures used in surgery, their quality and performance are directly related to the patient's wound healing and the success rate of the surgery. Therefore, sutures need to undergo rigorous testing to ensure their quality, among which tensile performance testing is particularly important.

[0003] A search revealed that Chinese patent CN216284648U discloses a data cable tensile performance testing machine. While there are currently comprehensive tensile testing devices on the market for testing different materials or products, these devices are complex in structure, expensive, and difficult to maintain. For companies that only produce data cables and only need to test the tensile performance of the cables, the high operating costs are prohibitive. This new machine allows for automatic testing of the tensile performance of data cables after the cable is clamped. The overall structure is relatively simple, easy to process and maintain, and has low manufacturing costs, saving on production costs for companies. Furthermore, the first and second clamping components can tightly clamp the data cable, preventing it from falling off during testing, providing excellent clamping performance.

[0004] The aforementioned testing machine is convenient for testing the tensile properties of data cables, but when testing the tensile properties of seams, because the seams are thin, when the seams are fixed on the clamping device, the seams are prone to slipping in the clamping gap during the pulling process due to unstable clamping force, causing the taut seams to loosen and spring back, resulting in inaccurate tensile property test data. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a suture tensile performance testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a suture tensile performance testing device, comprising a testing platform, a groove formed on the upper surface of the testing platform, a stepper motor fixedly mounted on one side of the testing platform, a lead screw rotatably connected inside the groove, one end of the lead screw fixedly connected to the output end of the stepper motor, a scale provided on the upper surface of the testing platform, a connecting block threadedly connected to the external of the lead screw, the connecting block slidably connected inside the groove, and mounting frames fixedly connected to the upper surface of the connecting block and one side of the upper surface of the testing platform, a laser displacement sensor fixedly mounted on one side of one of the mounting frames, and a clamping assembly provided on one side of the mounting frame.

[0007] As a further description of the above technical solution:

[0008] The clamping assembly includes a fixing frame, which is fixedly connected to one side of the mounting frame, and a winding reel is provided inside the mounting frame.

[0009] As a further description of the above technical solution:

[0010] A stud is threaded to one side of the fixed frame. A knob is fixedly connected to one end of the stud, and a pressure plate is rotatably connected to the other end of the stud. An extrusion block is provided on one side of the pressure plate. The extrusion block is made of polyurethane.

[0011] As a further description of the above technical solution:

[0012] The inner wall of the fixed frame has two sliding grooves, and a slider is slidably connected inside the sliding groove. A limit rod is hinged to one side of the slider, and one end of the two limit rods is hinged to one side of the pressure plate.

[0013] As a further description of the above technical solution:

[0014] A replacement component is provided on one side of the mounting frame. The replacement component includes two mounting slots, which are located on one side of the mounting frame.

[0015] As a further description of the above technical solution:

[0016] An installation block is slidably connected inside the installation slot. A limit groove is formed on the upper surface of the installation block. Two fixing boxes are fixedly connected to the upper surface of the installation frame. Multiple connecting posts are slidably connected to the upper surface of the fixing boxes. A limit block is fixedly connected to one end of each of the multiple connecting posts.

[0017] As a further description of the above technical solution:

[0018] The other end of the multiple connecting columns is fixedly connected to a pull block, and the upper surface of the limiting block is fixedly connected to multiple springs, one end of the multiple springs being fixedly connected to the inner wall of the fixing box.

[0019] This utility model has the following beneficial effects:

[0020] 1. By setting up a clamping component, this utility model uses a winding disc to wrap the thread during the tensile performance test of the thread, and then uses a pressure plate to press the thread against the outside, which enhances the clamping force on the thread. Under the action of the extrusion block, the friction is enhanced, which helps to further improve the tightness of the thread clamping force and reduces the phenomenon of the thread slipping off due to instability during the test, which leads to inaccurate test data.

[0021] 2. By setting up replacement components, this utility model makes it easier to disassemble and replace the winding reel in the clamping component. It reduces the friction caused by long-term entanglement with sewing thread, which leads to damage and dents on the surface of the winding reel, making it difficult to wind and fix the sewing thread. The connection between the mounting groove and the mounting block, and the use of the limiting block to limit the mounting block, increases the convenience of disassembling and assembling the winding reel. Attached Figure Description

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

[0023] Figure 2 This is a schematic diagram of the mounting frame structure proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the slider structure proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting groove proposed in this utility model;

[0026] Figure 5 This is a partial structural diagram of the connection point of the connecting column proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the mounting block structure proposed in this utility model.

[0028] Legend:

[0029] 1. Test platform; 2. Groove; 3. Stepper motor; 4. Lead screw; 5. Scale; 6. Connecting block; 7. Mounting frame; 8. Laser displacement sensor; 9. Fixing frame; 10. Winding reel; 11. Stud; 12. Knob; 13. Pressure plate; 14. Extrusion block; 15. Slide groove; 16. Slider; 17. Limiting rod; 18. Mounting groove; 19. Fixing box; 20. Connecting column; 21. Limiting block; 22. Pull block; 23. Spring; 24. Mounting block; 25. Limiting groove. Detailed Implementation

[0030] 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.

[0031] As attached Figure 1-6 As shown, one embodiment of this utility model provides a suture tensile performance testing device, including a test platform 1. A groove 2 is formed on the upper surface of the test platform 1. A stepper motor 3 is fixedly installed on one side of the test platform 1. A lead screw 4 is rotatably connected inside the groove 2. One end of the lead screw 4 is fixedly connected to the output end of the stepper motor 3. A scale 5 is provided on the upper surface of the test platform 1. A connecting block 6 is threadedly connected to the outside of the lead screw 4. The connecting block 6 is slidably connected inside the groove 2. Mounting frames 7 are fixedly connected to the upper surface of the connecting block 6 and one side of the upper surface of the test platform 1. A laser displacement sensor 8 is fixedly installed on one side of one of the mounting frames 7. A clamping component is provided on one side of the mounting frame 7. The scale 5 facilitates the penetration of the position distance of the suture after it is stretched.

[0032] As attached Figure 1 As shown, the clamping assembly includes a fixing frame 9, which is fixedly connected to one side of the mounting frame 7. The mounting frame 7 has a winding disc 10 inside, which facilitates the winding of the sewing thread.

[0033] As attached Figure 2As shown, a stud 11 is threaded onto one side of the fixing frame 9. A knob 12 is fixedly connected to one end of the stud 11, and a pressure plate 13 is rotatably connected to the other end of the stud 11. An extrusion block 14 is provided on one side of the pressure plate 13. The extrusion block 14 is made of polyurethane. Two sliding grooves 15 are opened on the inner wall of the fixing frame 9. A slider 16 is slidably connected inside the sliding grooves 15. A limit rod 17 is hinged to one side of the slider 16. One end of the two limit rods 17 is hinged to one side of the pressure plate 13. A mounting frame 7 is provided on one side. There is a replacement component, which includes two mounting slots 18. The two mounting slots 18 are opened on one side of the mounting frame 7. Two fixing boxes 19 are fixedly connected to the upper surface of the mounting frame 7. The pressure plate 13 is pushed by the stud 11 to facilitate the external compression of the sewing thread. The pressure is transmitted through the compression block 14 to enhance the tightness of the compressed sewing thread. The limiting rod 17 is convenient to limit the movement of the pressure plate 13. The mounting slots 18 facilitate the convenient installation of the mounting block 24. The polyurethane material has high wear resistance.

[0034] As attached Figure 6 As shown, a mounting block 24 is slidably connected inside the mounting groove 18. A limiting groove 25 is formed on the upper surface of the mounting block 24 to facilitate installation into the interior of the mounting groove 18.

[0035] As attached Figure 5 As shown, multiple connecting posts 20 are slidably connected to the upper surface of the fixing box 19. One end of the multiple connecting posts 20 is fixedly connected to a limiting block 21, and the other end of the multiple connecting posts 20 is fixedly connected to a pull block 22. The limiting block 21, in cooperation with the limiting groove 25, limits the mounting block 24.

[0036] As attached Figure 4 As shown, multiple springs 23 are fixedly connected to the upper surface of the limiting block 21. One end of each spring 23 is fixedly connected to the inner wall of the fixing box 19. The elastic force of the multiple springs 23 is used to push the limiting block 21 so that it engages more tightly with the limiting groove 25.

[0037] Working principle: During the tensile test, the two ends of the thread are first wrapped around the surface of the winding disc 10. Then, the knob 12 is turned to rotate the stud 11. Under the action of the threaded hole in the middle of the fixed frame 9, the pressure plate 13 is pushed to move towards one side of the thread. During the movement of the pressure plate 13, it will pull the limit rod 17, causing the limit rod 17 to be pulled up, which will drive the slider 16 to slide inside the slide groove 15, thus limiting the movement of the pressure plate 13. When the extrusion block 14 is pressed against and squeezes the thread, it will fix the thread. Then, the stepper motor 3 is started. Its output end drives the lead screw 4 to rotate through the internal gearbox. The lead screw 4 drives the connecting block 6 to slide inside the groove 2, thereby causing the mounting frame 7 on one side to move. The tensile test of the thread is carried out by the displacement detection of the laser displacement sensor 8.

[0038] When the surface of the winding reel 10 is damaged by long-term friction from the sewing thread, and needs to be replaced, pull the pull blocks 22 on both sides, which will drive multiple connecting posts 20 to pull up the limiting block 21. The limiting block 21 is then pulled into the fixed box 19. At this time, the mounting block 24 is released from the limit. Then, the mounting block 24 is slid out from the inside of the mounting groove 18 to facilitate the removal of the winding reel 10. The above operation is reversed during installation.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 suture tensile property testing device comprising a test bench (1), characterized in that: The upper surface of the test platform (1) is provided with a groove (2), one side of the test platform (1) is fixedly provided with a stepping motor (3), the inside of the groove (2) is rotatably connected with a lead screw (4), one end of the lead screw (4) is fixedly connected with the output end of the stepping motor (3), the upper surface of the test platform (1) is provided with a scale (5), the outside of the lead screw (4) is threadedly connected with a connecting block (6), the connecting block (6) is slidably connected in the groove (2), the upper surface of the connecting block (6) and one side of the upper surface of the test platform (1) are fixedly connected with a mounting frame (7), one side of one of the mounting frames (7) is fixedly provided with a laser displacement sensor (8), one side of the mounting frame (7) is provided with a clamping assembly.

2. The suture tensile property testing device of claim 1, wherein: The clamping assembly comprises a fixed frame (9), the fixed frame (9) is fixedly connected with the mounting frame (7), and the inside of the mounting frame (7) is provided with a winding reel (10).

3. The suture tensile property testing device of claim 2, wherein: One side of the fixed frame (9) is threadedly connected with a stud (11), one end of the stud (11) is fixedly connected with a knob (12), the other end of the stud (11) is rotatably connected with a pressing plate (13), one side of the pressing plate (13) is provided with an extrusion block (14), and the extrusion block (14) is made of polyurethane.

4. The suture tensile property testing device of claim 2, wherein: The inner wall of the fixed frame (9) is provided with two sliding grooves (15), the sliding grooves (15) are slidably connected with sliding blocks (16), one side of the sliding blocks (16) is hingedly connected with limiting rods (17), and one end of the limiting rods (17) is hingedly connected with one side of the pressing plate (13).

5. The suture tensile property testing device of claim 1, wherein: One side of the mounting frame (7) is provided with a replacement assembly, the replacement assembly comprises two mounting grooves (18), and the mounting grooves (18) are formed in one side of the mounting frame (7).

6. The suture tensile property testing device of claim 5, wherein: The inside of the mounting groove (18) is slidably connected with a mounting block (24), the upper surface of the mounting block (24) is provided with a limiting groove (25), the upper surface of the mounting frame (7) is fixedly connected with two fixed boxes (19), the upper surface of the fixed box (19) is slidably connected with a plurality of connecting columns (20), and one end of the connecting columns (20) is fixedly connected with a limiting block (21).

7. The suture tensile property testing device of claim 6, wherein: The other end of the connecting column (20) is fixedly connected with a pulling block (22), the upper surface of the limiting block (21) is fixedly connected with a plurality of springs (23), and one end of the spring (23) is fixedly connected with the inner wall of the fixed box (19).

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