Tension compensation pay-off rack for weaving degradable medical stent
By designing the guiding and anti-detachment components, the problems of suture loosening and tension adjustment during the traction and retraction process of biodegradable medical stents are solved, achieving stable traction and anti-detachment effects for the sutures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN SETH MEDICAL BIOENGINEERING CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-05-19
AI Technical Summary
Existing biodegradable medical stents are easily passively pulled out under external tensile force, the tension of the thread is inconvenient to adjust, and the shape of the take-up roller is easy to loosen during the winding and unwinding process, making it difficult to automatically fix.
A tension-compensated wire feeding frame including a guide component and an anti-detachment component was designed. The guide component uses a worm gear structure to make the transmission roller rotate in the opposite direction to adjust the wire tension. The anti-detachment component uses a pressure plate and balls to prevent the wire from loosening.
It achieves stable clamping and prevents loosening of the line during the traction process, adapts to the traction requirements of different specifications of lines, and ensures that the line does not detach from the take-up roller during the winding and unwinding process.
Smart Images
Figure CN224258000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical stent processing, specifically a tension-compensating wire feeding frame for biodegradable medical stent braiding. Background Technology
[0002] Biodegradable medical stents are structures used to support and maintain internal ducts in the human body, such as cardiovascular stents, digestive tract stents, and respiratory tract stents. They are usually woven from biodegradable thread materials. After fulfilling their function of supporting blood vessels, the stent will be decomposed and absorbed by the body's biological processes over time, eliminating the need for surgical removal.
[0003] Because external tension can easily pull the yarn out passively, different supports are suitable for different yarn specifications, it is inconvenient to adjust the yarn's tightness, it is not easy to automatically fix it when traction stops, and the yarn winding roller is prone to loosening during winding and unwinding, making it inconvenient to automatically tighten the yarn. Utility Model Content
[0004] The purpose of this invention is to provide a tension-compensating wire feeder for biodegradable medical stent braiding, in order to solve the technical problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A tension-compensating wire feeding frame for biodegradable medical stent braiding includes a fixing plate. Two wire sleeves are fixedly installed on the front of the fixing plate. A guide assembly and an anti-detachment assembly are installed on the front of the fixing plate. The guide assembly includes two drive rollers. One of the drive rollers is movably installed on the front of the fixing plate. Two first guide rods are fixedly installed inside the fixing plate. A first shaft block is installed on the rear of the other drive roller and sleeved on the outside of the two first guide rods. A screw is movably connected to the top of the first shaft block. A knob is fixedly installed on the top of the screw. A motor is installed on the top of the fixing plate. Worm gears are fixedly connected to the rear of both drive rollers. A worm gear is fixedly installed at the bottom end of the output shaft of the motor.
[0007] Preferably, two passive rollers are movably mounted on the front of the fixed plate, and a second shaft block is mounted on the rear of one of the passive rollers. Two second guide rods are mounted inside the fixed plate and through the second shaft block. A first spring is sleeved on the outside of the two second guide rods. A pull rod is fixedly mounted on the top of the second shaft block. The second shaft block is slidably sleeved on the outside of the second guide rods, and the pull rod is slidably mounted through the top of the fixed plate.
[0008] Preferably, the first shaft block is slidably sleeved on the outside of the two first guide rods, and the shaft of the transmission roller passes through the inside of the first shaft block.
[0009] Preferably, the bottom end of the screw is connected to the first shaft block by a bearing, and the screw passes through the top of the fixed plate in a threaded connection.
[0010] Preferably, the worm grooves at both ends of the worm are arranged in opposite directions, the length of the worm groove on the outside of the worm is greater than the length of the worm groove at the bottom, and the worm wheel and the worm are meshed with each other.
[0011] Preferably, the anti-detachment component includes a fixing post and a positioning rod. The fixing post is fixedly installed on the top of the fixing plate, and the positioning rod is fixedly installed on the front of the fixing plate. A pressure plate is movably installed on the front of the fixing post near its top. A handle is fixedly installed on the top of the pressure plate. A pressure roller is movably installed on the end of the pressure plate. Ball bearings are movably installed on both ends of the pressure roller. A second spring connects the bottom of the pressure plate to the front of the fixing plate.
[0012] Preferably, the pressure plate is located at the front of the fixed column and is rotatably arranged, and the pressure roller is located at the end of the pressure plate and is rotatably arranged.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1) This wire feeding frame, by setting a guide component, has a worm gear driving two worm wheels to rotate, causing two transmission rollers to rotate in opposite directions simultaneously. The two transmission rollers facilitate the traction of the wire. The screw drives the first shaft block to slide up and down, which facilitates the adjustment of the wire's clamping. It is suitable for traction of wires of different specifications. The meshing of the worm gear and worm wheel prevents the wire from being passively pulled out during stretching.
[0015] 2) The wire feeding frame, by setting an anti-detachment component, the pressure plate drives the pressure roller to press against the outer ring of the wire take-up roller under the action of the second spring, which can press the wire tightly inside the take-up roller to prevent the wire from loosening during winding and unwinding. Through the ball bearings, the ball bearings roll on the inner wall of the wire take-up roller to prevent the wire from detaching from the take-up roller. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a tension compensation wire feeding frame for braiding a biodegradable medical stent, according to an embodiment of the present invention.
[0017] Figure 2 This is a schematic diagram of the structure of the guide component in an embodiment of the present invention;
[0018] Figure 3 This is a schematic diagram of the rear structure of the guide assembly in an embodiment of this utility model;
[0019] Figure 4 This is a schematic diagram of the anti-detachment component in an embodiment of the present invention.
[0020] In the diagram: 1. Fixed plate; 2. Guide assembly; 3. Anti-detachment assembly; 4. Wire sleeve; 5. Transmission roller; 6. First guide rod; 7. First shaft block; 8. Screw; 9. Knob; 10. Motor; 11. Worm gear; 12. Worm; 13. Passive roller; 14. Second guide rod; 15. Second shaft block; 16. First spring; 17. Pull rod; 18. Fixed column; 19. Positioning rod; 20. Pressure plate; 21. Handle; 22. Pressure roller; 23. Ball bearing; 24. Second spring. Detailed Implementation
[0021] 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.
[0022] Example 1
[0023] Combination Figures 1-4 A biodegradable medical stent braiding tension compensation wire feeder includes a fixing plate 1, two wire sleeves 4 are fixedly installed on the front of the fixing plate 1, and a guide component 2 and an anti-detachment component 3 are installed on the front of the fixing plate 1.
[0024] See Figure 2 and Figure 3 Furthermore, the guide assembly 2 includes two drive rollers 5. One drive roller 5 is movably mounted on the front of the fixed plate 1. Two first guide rods 6 are fixedly mounted inside the fixed plate 1. A first shaft block 7 is mounted on the rear of the other drive roller 5 and sleeved on the outside of the two first guide rods 6. A screw 8 is movably connected to the top of the first shaft block 7. A knob 9 is fixedly mounted on the top of the screw 8. A motor 10 is mounted on the top of the fixed plate 1. A worm gear 11 is fixedly connected to the rear of both drive rollers 5. A worm gear 12 is fixedly mounted at the bottom of the output shaft of the motor 10. The medical stent is woven from biodegradable material threads, and the two drive rollers 5 are used to pull out the threads.
[0025] Two passive rollers 13 are movably mounted on the front of the fixed plate 1. A second shaft block 15 is mounted on the rear of one of the passive rollers 13. Two second guide rods 14 are mounted inside the fixed plate 1 and through the second shaft block 15. A first spring 16 is sleeved on the outside of the two second guide rods 14. A pull rod 17 is fixedly mounted on the top of the second shaft block 15. The second shaft block 15 is slidably sleeved on the outside of the second guide rods 14. The pull rod 17 slides through the top of the fixed plate 1. The two passive rollers 13 are used to stretch the yarn. The second shaft block 15 slides automatically downward under the action of the first spring 16, so that the two passive rollers 13 compress the yarn accordingly. The yarn can be easily removed by pulling the pull rod 17.
[0026] The first shaft block 7 is slidably fitted onto the outside of the two first guide rods 6. The shaft of the transmission roller 5 passes through the inside of the first shaft block 7. The first shaft block 7 drives the transmission roller 5 to slide up and down, thereby changing the distance between the two transmission rollers 5.
[0027] The bottom end of the screw 8 is connected to the first shaft block 7 by a bearing. The screw 8 passes through the top of the fixed plate 1 and is threaded. The screw 8 drives the first shaft block 7 to adjust the pressure of the transmission roller 5 on the line.
[0028] The worm grooves at both ends of the worm 12 are arranged in opposite directions. The length of the worm groove on the outside of the worm 12 is greater than the length of the worm groove at the bottom. The worm wheel 11 and the worm 12 are meshed with each other. The worm 12 drives the two worm wheels 11 to rotate, so that the two transmission rollers 5 rotate at the same time to pull out the line.
[0029] Specifically, the worm gear 12 drives the two transmission rollers 5 to rotate, so as to facilitate the pulling out of the line. The rotating screw 8 drives the first shaft block 7 to slide up and down, thereby changing the distance between the two transmission rollers 5.
[0030] Example 2
[0031] See Figure 4 Furthermore, based on Embodiment 1, the anti-detachment component 3 includes a fixed post 18 and a positioning rod 19. The fixed post 18 is fixedly installed on the top of the fixed plate 1, and the positioning rod 19 is fixedly installed on the front of the fixed plate 1. A pressure plate 20 is movably installed on the front of the fixed post 18 near the top. A handle 21 is fixedly installed on the top of the pressure plate 20. A pressure roller 22 is movably installed on the end of the pressure plate 20. Ball bearings 23 are movably installed on both ends of the pressure roller 22. A second spring 24 is connected between the bottom of the pressure plate 20 and the front of the fixed plate 1.
[0032] The pressure plate 20 is located at the front of the fixed column 18 and is movably rotatable. The pressure roller 22 is located at the end of the pressure plate 20 and is movably rotatable. The pressure plate 20 drives the pressure roller 22 to press against the outer ring of the winding roller of the line body through the second spring 24 to prevent the line body from loosening.
[0033] Specifically, the pressure plate 20, under the action of the second spring 24, drives the pressure roller 22 to press against the outer ring of the take-up roller of the line body to prevent the line body from loosening during take-up and unwinding. The ball bearing 23 rotates on the inner wall of the take-up roller to prevent the line body from detaching from the take-up roller.
[0034] In actual operation, the medical stent is woven from biodegradable material threads. The thread winding rollers used to weave the stent are placed in front of the fixed plate 1, and the threads are inserted between two passive rollers 13 and two drive rollers 5. The thread sleeve 4 prevents deviation, and the drive rollers 5 pull the threads into the weaving equipment.
[0035] During traction and output, the cable passes between two passive rollers 13 and two drive rollers 5. By starting the motor 10, the worm 12 drives the two worm wheels 11 to rotate. Since the worm grooves at both ends of the worm 12 are in opposite directions, the two worm wheels 11 drive the two drive rollers 5 to rotate in opposite directions and rotate simultaneously, thereby pulling out the cable. When adjusting the tightness of different medical stent cables, the knob 9 is rotated to make the screw 8 rotate. The screw 8 drives the first shaft block 7 to slide up and down under the action of the thread. The corresponding worm wheel 11 is located outside the worm 12 to adapt to the rotation, thereby changing the distance between the two drive rollers 5.
[0036] When performing anti-detachment positioning, the take-up roller of the yarn is sleeved on the outside of the positioning rod 19 and rotated. The pressure plate 20 rotates under the action of the second spring 24 and drives the pressure roller 22 to press on the outer ring of the take-up roller of the yarn to prevent the yarn from loosening during take-up and unwinding. The ball bearing 23 rotates on the inner wall of the take-up roller to prevent the take-up roller of the yarn from detaching. When replacing the take-up roller of the yarn, the pressure plate 20 is pulled by the handle 21 to make the pressure roller 22 detach from the take-up roller, and the take-up roller is taken out and replaced.
[0037] By setting the guide component 2, the worm gear 12 drives the two worm wheels 11 to rotate, causing the two transmission rollers 5 to rotate simultaneously in opposite directions. The two transmission rollers 5 facilitate the traction of the yarn. The screw 8 drives the first shaft block 7 to slide up and down, which facilitates the adjustment of the yarn's clamping degree and is suitable for traction of yarns of different specifications. The meshing of the worm gear 12 and the worm wheel 11 prevents the yarn from being passively pulled out during stretching. By setting the anti-detachment component 3, the pressure plate 20 drives the pressure roller 22 to press against the outer ring of the yarn take-up roller under the action of the second spring 24, which can press the yarn tightly inside the take-up roller and prevent the yarn from loosening during take-up and unwinding. The ball bearings 23 roll on the inner wall of the yarn take-up roller to prevent the yarn from detaching from the take-up roller.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tension-compensating wire feeder for biodegradable medical stent braiding, comprising a fixing plate (1), wherein two wire sleeves (4) are fixedly installed on the front part of the fixing plate (1), characterized in that: The front of the fixing plate (1) is equipped with a guide assembly (2) and an anti-detachment assembly (3); The guide assembly (2) includes two drive rollers (5), one of which is movably mounted on the front of the fixed plate (1). Two first guide rods (6) are fixedly mounted inside the fixed plate (1). A first shaft block (7) is mounted on the rear of the other drive roller (5) and sleeved on the outside of the two first guide rods (6). A screw (8) is movably connected to the top of the first shaft block (7). A knob (9) is fixedly mounted on the top of the screw (8). A motor (10) is mounted on the top of the fixed plate (1). A worm gear (11) is fixedly connected to the rear of both drive rollers (5). A worm (12) is fixedly mounted at the bottom of the output shaft of the motor (10).
2. The tension-compensating wire feeding frame for biodegradable medical stent braiding according to claim 1, characterized in that: Two passive rollers (13) are movably installed at the front of the fixed plate (1). A second shaft block (15) is installed at the rear of one of the passive rollers (13). Two second guide rods (14) are installed inside the fixed plate (1) and through the second shaft block (15). A first spring (16) is sleeved on the outside of the two second guide rods (14). A pull rod (17) is fixedly installed on the top of the second shaft block (15). The second shaft block (15) is slidably sleeved on the outside of the second guide rod (14). The pull rod (17) slides through the top of the fixed plate (1).
3. The tension-compensating wire feeding frame for biodegradable medical stent braiding according to claim 1, characterized in that: The first shaft block (7) is slidably fitted onto the outside of the two first guide rods (6), and the shaft of the transmission roller (5) passes through the inside of the first shaft block (7).
4. The tension-compensating wire feeder for biodegradable medical stent braiding according to claim 1, characterized in that: The bottom end of the screw (8) is connected to the first shaft block (7) by a bearing, and the screw (8) passes through the top of the fixing plate (1) in a threaded connection.
5. The tension-compensating wire feeder for biodegradable medical stent braiding according to claim 1, characterized in that: The worm grooves at both ends of the worm (12) are arranged in opposite directions. The length of the worm groove on the outside of the worm (12) is greater than the length of the worm groove at the bottom. The worm wheel (11) and the worm (12) are meshed with each other.
6. The tension-compensating wire feeder for biodegradable medical stent braiding according to claim 1, characterized in that: The anti-detachment component (3) includes a fixed column (18) and a positioning rod (19). The fixed column (18) is fixedly installed on the top of the fixed plate (1). The positioning rod (19) is fixedly installed on the front of the fixed plate (1). A pressure plate (20) is movably installed on the front of the fixed column (18) near the top. A handle (21) is fixedly installed on the top of the pressure plate (20). A pressure roller (22) is movably installed on the end of the pressure plate (20). Ball bearings (23) are movably installed on both ends of the pressure roller (22). A second spring (24) is connected between the bottom of the pressure plate (20) and the front of the fixed plate (1).
7. The tension-compensating wire feeder for biodegradable medical stent braiding according to claim 6, characterized in that: The pressure plate (20) is located at the front of the fixed column (18) and is rotatably arranged, while the pressure roller (22) is located at the end of the pressure plate (20) and is rotatably arranged.