A drawstring structure for a medical catheter

Abstract

This utility model discloses a pull-wire structure for a medical catheter, including a pull-wire frame, multiple sets of guide roller mechanisms, a roller body clamping mechanism, and a stabilizing mechanism. The multiple sets of guide roller mechanisms include a rotating frame and a bottom roller. The roller body clamping mechanism includes a clamping tube and a clamping rod. The stabilizing mechanism includes a bottom ball ring and a connecting plate. Through the coordinated action of the rotating frame, bottom roller, rotating roller, and fixed roller, precise positioning and tension control of the medical catheter are achieved. The rotating frame is symmetrically installed on both sides of the pull-wire frame and can be rotated and adjusted. It works with a limiting turntable to limit the rotation range and prevent excessive deformation of the catheter. The roller body clamping mechanism adopts a clamping tube and clamping rod design, which realizes quick and convenient installation and disassembly. The combination of the rotating sleeve, the rotating insert block, and the rotating push spring forms a self-locking mechanism. The rotating push spring pushes the rotating insert block into the groove on the side wall of the clamping rod to ensure a firm connection. The clamping rod can pass through different adjustment holes, providing multiple installation position options and enhancing the adaptability of the device.

Description

Technical Field

[0001] This utility model relates to the field of pull-wire and pull-tube technology, and more specifically, it relates to a pull-wire structure for medical catheters. Background Technology

[0002] In existing technologies, the pull-wire structure of medical catheters has some inconveniences, especially in the design of the guide roller position and the rotation, fixing and disassembly of the rotating frame, which affects the ease of operation and maintenance efficiency of the equipment.

[0003] Firstly, in existing wire drawing structures, the position of the guide rollers is usually designed to be relatively fixed. This makes the adjustment of the guide rollers inflexible in actual operation, making it difficult to adapt to different specifications of conduits or different operational needs. When the diameter, material, or shape of the wire or conduit changes, operators often need to manually adjust the position of the guide rollers. However, such adjustments usually require cumbersome steps and may not be able to accurately adjust to the optimal position. If the guide rollers are too close or too far off, it may cause uneven tension during the wire drawing process, thereby affecting the accuracy of conduit advancement or causing conduit damage.

[0004] Secondly, the existing equipment's rotating frame fixing and disassembly design is cumbersome. The rotating frame is one of the core components controlling the pulling and advancing of the guide tube. During operation, it needs to be adjusted or disassembled for cleaning, replacement, or maintenance depending on the situation. The fixing method is usually quite complex, possibly involving multiple locking devices or knobs, requiring operators to spend considerable effort and time to complete the adjustment and disassembly. This inconvenient disassembly and installation process not only increases the complexity of operation. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a pull wire structure for medical catheters to solve the technical problems mentioned in the background art, such as the inconvenient position of the guide roller for pulling wires and tubes, and the cumbersome rotation, fixing and disassembly of the rotating frame.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pull-wire structure for a medical catheter, comprising a pull-wire frame, multiple sets of guide roller mechanisms, a roller body clamping mechanism, and a stabilizing mechanism. The multiple sets of guide roller mechanisms include a rotating frame and a bottom roller. The rotating frame is symmetrically and rotatably installed on both sides of the pull-wire frame, and the bottom roller is fixedly installed on the pull-wire frame. A rotating roller is installed at one end of the rotating frame, and the medical catheter passes sequentially between the rotating roller and the bottom roller. The roller body clamping mechanism includes a clamping tube and a clamping rod. A rotating sleeve is rotatably installed on the outer wall of the clamping tube, and a rotary push groove is opened on the inner wall of the rotating sleeve. A rotary insert is rotatably installed on the inner wall of the rotating sleeve, and a rotary push spring is installed between the rotary insert and the rotary push groove. The rotary push spring can push the rotary insert into the side wall of the clamping rod, so that the clamping rod is fixed in the clamping tube.

[0009] The present invention is further configured such that the stabilizing mechanism includes a bottom ball ring and a connecting plate. A connecting plate is installed at the bottom end of the side wall of the clamping tube, the bottom ball ring is installed at the bottom end of the rotating sleeve, a centripetal rail is installed at the top end of the connecting plate, and a pair of shrinking blocks are slidably installed on the centripetal rail. Multiple sets of centripetal rails and shrinking blocks are provided, and a shrinking spring is installed inside the shrinking blocks. The ball block at the bottom end of the bottom ball ring passes through different shrinking blocks in sequence, so that the bottom ball ring and the rotating sleeve rotate stably. Reverse rotation of the rotating sleeve causes the side wall groove of the clamping tube to push the rotating block to rotate in the opposite direction.

[0010] The present invention is further configured such that a bottom bracket is installed at the bottom end of the cable puller, and the bottom bracket is installed at the external installation position. The bottom bracket is installed at the bottom of the cable puller and connected to the external installation position, providing a stable installation foundation.

[0011] The present invention is further configured such that limiting turntables are installed on both sides of the pull frame for limiting rotation, and one end of the rotating frame is connected to the limiting turntables. The limiting turntables are installed on both sides of the pull frame for limiting rotation and are connected to the rotating frame to limit the rotation range of the rotating frame and prevent excessive rotation from causing deformation of the conduit.

[0012] The present invention is further configured such that side plates are installed on both sides of the limiting turntable, the connecting plate of the clamping pipe side wall is fixedly installed on the side plates, and the pull wire frame is provided with adjustment holes, and multiple sets of adjustment holes are provided. The adjustment holes are provided on the pull wire frame and multiple sets are provided to increase the adjustment flexibility of the device and adapt to different usage needs.

[0013] The present invention is further configured such that a limiting block is installed at one end of the locking rod, and the locking rod can pass through different adjustment holes, side plates and pull wire frames to engage with the locking tube, thereby fixing the limiting turntable on both sides of the pull wire frame.

[0014] The present invention is further configured such that fixed rollers are fixedly installed on both sides of the wire puller, and the medical catheter passes through the fixed roller, the rotating roller and the bottom roller in sequence. The rotation of the rotating roller pulls the movement of the catheter. The fixed rollers are fixedly installed on both sides of the wire puller to provide initial guidance for the catheter and ensure that the path of the catheter entering between the rotating roller and the bottom roller is stable.

[0015] The present invention is further configured such that a slot is provided on the side wall of the snap-fit ​​rod, and the rotating insert can rotate to extend into or move away from the slot. The slot is provided on the side wall of the snap-fit ​​rod and cooperates with the rotating insert to form a locking mechanism, providing a reliable fixing effect.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a drawstring structure for a medical catheter, which has the following beneficial effects:

[0018] This invention features multiple guide roller mechanisms. Through the coordinated action of the rotating frame, bottom roller, rotating roller, and fixed roller, precise positioning and tension control of medical catheters are achieved. The rotating frame is symmetrically installed on both sides of the cable puller and can be rotated and adjusted. It works with the limiting turntable to limit the rotation range and prevent excessive deformation of the catheter. The fixed roller provides initial guidance to ensure that the catheter enters a stable path. The channel formed by the rotating roller and the bottom roller can precisely control the trajectory of the catheter. This design greatly improves the accuracy and stability of catheter operation and adapts to catheter operation for different clinical needs.

[0019] This invention features a roller clamping mechanism, employing a clamping tube and clamping rod design for quick and convenient installation and disassembly. The combination of a rotating sleeve, a rotating insert block, and a rotating push spring forms a self-locking mechanism. The rotating push spring pushes the rotating insert block into the groove on the side wall of the clamping rod, ensuring a secure connection. The clamping rod can pass through different adjustment holes, providing multiple installation position options and enhancing the adaptability of the device. A limiting block prevents the clamping rod from completely passing through, ensuring the accuracy of the fixed position. This design simplifies the operation process, improves work efficiency, and reduces operational errors.

[0020] This invention incorporates a stabilizing mechanism, which forms a multi-point support system through a bottom ball ring and a connecting plate. The bottom ball ring is installed at the bottom of the rotating sleeve, with its ball blocks inserted between multiple sets of opposing contraction blocks. Under the action of the contraction springs, the opposing contraction blocks slide centripetally, forming a uniform surrounding fixation. The centripetal rail guides the movement of the opposing contraction blocks, ensuring stability and significantly enhancing the stability and smoothness of the rotating sleeve's rotation. This reduces vibration and swaying, ensuring stability during catheter operation and improving the accuracy and safety of catheter operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2 This is a schematic diagram of the multi-group guide roller mechanism in this utility model. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the multi-group guide roller mechanism in this utility model. Figure 2 ;

[0024] Figure 4 This is a schematic diagram of the roller body clamping mechanism and stabilizing mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the roller clamping mechanism and the stabilizing mechanism in this utility model.

[0026] In the diagram: 1. Pulling frame; 2. Rotating frame; 3. Bottom roller; 4. Rotating roller; 5. Clamping pipe; 6. Clamping rod; 7. Rotating sleeve; 8. Rotary push groove; 9. Rotary insert block; 10. Rotary push spring; 11. Bottom ball ring; 12. Connecting plate; 13. Centripetal rail; 14. Shrink block; 15. Shrink spring; 16. Bottom connecting frame; 17. Limiting turntable; 18. Side plate; 19. Adjustment hole; 20. Limiting block; 21. Fixed roller; 22. Clamping groove. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A medical catheter pull-wire structure includes a pull-wire frame 1, multiple sets of guide roller mechanisms, a roller body clamping mechanism, and a stabilizing mechanism. The multiple sets of guide roller mechanisms include a rotating frame 2 and a bottom roller 3. The rotating frame 2 is symmetrically rotated and installed on both sides of the pull-wire frame 1. The bottom roller 3 is fixedly installed on the pull-wire frame 1. A rotating roller 4 is installed at one end of the rotating frame 2. The medical catheter passes through the rotating roller 4 and the bottom roller 3 in sequence. The roller body clamping mechanism includes a clamping tube 5 and a clamping rod 6. A rotating sleeve 7 is rotatably installed on the outer wall of the clamping tube 5. A rotary push groove 8 is opened on the inner wall of the rotating sleeve 7. A rotary insert block 9 is rotatably installed on the inner wall of the rotating sleeve 7. A rotary push spring 10 is installed between the rotary insert block 9 and the rotary push groove 8. The rotary push spring 10 can push the rotary insert block 9 into the side wall of the clamping rod 6, so that the clamping rod 6 is fixed in the clamping tube 5.

[0031] In this embodiment, multiple guide roller mechanisms work in concert through the rotating frame 2 and the bottom roller 3. First, the medical catheter passes sequentially through the fixed roller 21, the rotating roller 4, and the bottom roller 3. When it is necessary to adjust the catheter path or tension, the rotating frame 2 can rotate symmetrically on both sides of the cable puller 1, driving the rotating roller 4 to move, thereby changing the catheter's running trajectory and tension. One end of the rotating frame 2 is connected to the limiting disc 17 to restrict its rotation range, ensuring that the catheter runs within a suitable track. The rotation of the rotating roller 4 can pull the catheter to move, achieving smooth catheter delivery. The roller clamping mechanism is connected and fixed through the clamping tube 5 and the clamping rod 6. The clamping rod 6 passes through different adjustment holes 19, side plate 18 and pull wire frame 1 and is inserted into the clamping tube 5. The inner wall of the rotating sleeve 7 on the outer wall of the clamping tube 5 has a rotating insert block 9. Under the action of the rotating push spring 10, the rotating insert block 9 can extend into the clamping groove 22 on the side wall of the clamping rod 6, and firmly fix the clamping rod 6 in the clamping tube 5. The limiting block 20 at one end of the clamping rod 6 prevents the clamping rod 6 from passing through completely, thereby fixing the limiting turntable 17 at specific positions on both sides of the pull wire frame 1.

[0032] The stabilizing mechanism includes a bottom ball ring 11 and a connecting plate 12. The connecting plate 12 is installed at the bottom end of the side wall of the clamping tube 5. The bottom ball ring 11 is installed at the bottom end of the rotating sleeve 7. The top end of the connecting plate 12 is equipped with a centripetal rail 13. A pair of shrinking blocks 14 are slidably installed on the centripetal rail 13. Multiple sets of centripetal rails 13 and pair of shrinking blocks 14 are provided. A pair of shrinking springs 15 are installed inside the pair of shrinking blocks 14. The ball block at the bottom end of the bottom ball ring 11 passes through different pair of shrinking blocks 14 in sequence, so that the bottom ball ring 11 and the rotating sleeve 7 rotate stably. Reverse rotation of the rotating sleeve 7 causes the side wall groove of the clamping tube 5 to push the rotating insert block 9 to rotate in the opposite direction.

[0033] In this embodiment, the stabilizing mechanism provides rotational stability through the bottom ball ring 11 and the connecting plate 12. The connecting plate 12 is installed at the bottom of the side wall of the clamping tube 5. Multiple sets of centripetal rails 13 are provided on the top of the connecting plate 12. The counterweights 14 on the centripetal rails 13 can slide centripetally under the action of the counterweight springs 15. The bottom ball ring 11 is installed at the bottom of the rotating sleeve 7. Its bottom ball block passes between different counterweights 14 to form multi-point support, ensuring that the bottom ball ring 11 and the rotating sleeve 7 can rotate stably. When disassembly is required, the rotating sleeve 7 is rotated in the opposite direction, causing the groove on the side wall of the clamping tube 5 to push the rotating insert 9 to rotate in the opposite direction and disengage from the slot 22 of the clamping rod 6, thus achieving quick disassembly.

[0034] Please see Figures 1-5 As a supplementary embodiment of a medical catheter pull-wire structure with multiple sets of guide roller mechanisms, roller clamping mechanisms, and stabilizing mechanisms: A bottom connecting frame 16 is installed at the bottom end of the pull-wire frame 1, and the bottom connecting frame 16 is installed in the external installation position. Limiting turntables 17 are installed on both sides of the pull-wire frame 1 to limit rotation, and one end of the rotating frame 2 is connected to the limiting turntable 17. Side plates 18 are installed on both sides of the limiting turntable 17. The connecting plate 12 on the side wall of the clamping tube 5 is fixedly installed on the side plate 18. An adjustment hole 19 is opened on the pull-wire frame 1, and the adjustment... Multiple sets of joint holes 19 are provided. A limiting block 20 is installed at one end of the locking rod 6. The locking rod 6 can pass through different adjustment holes 19, side plates 18 and pull wire frame 1 to engage with the locking tube 5. The limiting turntable 17 is fixed on both sides of the pull wire frame 1. Fixed rollers 21 are fixedly installed on both sides of the pull wire frame 1. The medical catheter passes through the fixed roller 21, rotating roller 4 and bottom roller 3 in sequence. The rotation of the rotating roller 4 pulls the movement of the catheter. A locking groove 22 is opened on the side wall of the locking rod 6. The rotating insert block 9 can rotate to extend into or away from the locking groove 22.

[0035] More specifically, the medical catheter is sequentially passed between the fixed roller 21, the rotating roller 4, and the bottom roller 3 to establish the catheter's running path. Different adjustment holes 19 on the pull frame 1 are selected as needed. The clamping rod 6 passes through the selected adjustment hole 19, the side plate 18, and the pull frame 1 to clamp with the clamping tube 5. After the clamping rod 6 is inserted into the clamping tube 5, the rotating insert block 9 extends into the clamping rod 6's slot 22 under the action of the rotating push spring 10, achieving a firm connection. The limiting block 20 prevents the clamping rod 6 from passing through completely. The ball block of the bottom ball ring 11 passes between multiple sets of shrinking blocks 14, forming multi-point stable support under the action of the shrinking spring 15. The rotating roller 4 rotates to drive the catheter's movement. The tension and running trajectory of the catheter can be controlled by adjusting the position of the rotating frame 2. When adjustment or disassembly is required, the rotating sleeve 7 is rotated in the opposite direction to disengage the rotating insert block 9 from the clamping rod 6's slot 22. The clamping rod 6 can then be pulled out of the clamping tube 5 for easy readjustment or maintenance.

[0036] In summary, when the overall equipment is in use or operation: when multiple sets of guide roller mechanisms are required to operate, the multiple sets of guide roller mechanisms work together through the rotating frame 2 and the bottom roller 3. First, the medical catheter passes through the fixed roller 21, the rotating roller 4 and the bottom roller 3 in sequence. When it is necessary to adjust the catheter path or tension, the rotating frame 2 can rotate symmetrically on both sides of the pull frame 1, driving the rotating roller 4 to move, thereby changing the running trajectory and tension of the catheter. One end of the rotating frame 2 is connected to the limiting turntable 17 to limit its rotation range and ensure that the catheter runs in a suitable track. The rotation of the rotating roller 4 can pull the catheter to move, realizing the smooth delivery of the catheter.

[0037] When the roller clamping mechanism is in operation, the roller clamping mechanism is connected and fixed through the clamping tube 5 and the clamping rod 6. The clamping rod 6 passes through different adjustment holes 19, side plate 18 and pull wire frame 1 and is inserted into the clamping tube 5. The inner wall of the rotating sleeve 7 on the outer wall of the clamping tube 5 has a rotating insert block 9. Under the action of the rotating push spring 10, the rotating insert block 9 can extend into the clamping groove 22 on the side wall of the clamping rod 6, and firmly fix the clamping rod 6 in the clamping tube 5. The limiting block 20 at one end of the clamping rod 6 prevents the clamping rod 6 from passing through completely, thereby fixing the limiting turntable 17 at specific positions on both sides of the pull wire frame 1.

[0038] When the stabilizing mechanism is required to operate, it provides rotational stability through the bottom ball ring 11 and the connecting plate 12. The connecting plate 12 is installed at the bottom of the side wall of the clamping tube 5. Multiple sets of centripetal rails 13 are provided on the top of the connecting plate 12. The collapsible blocks 14 on the centripetal rails 13 can slide centripetally under the action of the collapsible springs 15. The bottom ball ring 11 is installed at the bottom of the rotating sleeve 7. Its bottom ball block passes between different collapsible blocks 14 to form multi-point support, ensuring that the bottom ball ring 11 and the rotating sleeve 7 can rotate stably. When disassembly is required, the rotating sleeve 7 is rotated in the opposite direction, causing the groove on the side wall of the clamping tube 5 to push the rotating insert block 9 to rotate in the opposite direction and disengage from the slot 22 of the clamping rod 6, thus achieving quick disassembly.

[0039] The medical catheter is sequentially passed between the fixed roller 21, the rotating roller 4, and the bottom roller 3 to establish the catheter's running path. Different adjustment holes 19 on the pull frame 1 are selected as needed. The clamping rod 6 passes through the selected adjustment hole 19, the side plate 18, and the pull frame 1 to clamp with the clamping tube 5. After the clamping rod 6 is inserted into the clamping tube 5, the rotating insert block 9 extends into the clamping rod 6's slot 22 under the action of the rotating push spring 10, achieving a firm connection. The limiting block 20 prevents the clamping rod 6 from passing through completely. The ball block of the bottom ball ring 11 passes between multiple sets of shrinking blocks 14, forming multi-point stable support under the action of the shrinking spring 15. The rotating roller 4 rotates to drive the catheter's movement. The tension and running trajectory of the catheter can be controlled by adjusting the position of the rotating frame 2. When adjustment or disassembly is required, the rotating sleeve 7 is rotated in the opposite direction to disengage the rotating insert block 9 from the clamping rod 6's slot 22. The clamping rod 6 can then be pulled out of the clamping tube 5 for easy readjustment or maintenance.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pull wire structure of a medical catheter, comprising a pull wire frame (1), a plurality of groups of guide roller mechanisms, a roller body clamping mechanism and a stabilizing mechanism, characterized in that: The multi-group guide roller mechanism includes a rotating frame (2) and a bottom roller (3). The rotating frame (2) is symmetrically rotated and installed on both sides of the wire puller (1). The bottom roller (3) is fixedly installed on the wire puller (1). A rotating roller (4) is installed at one end of the rotating frame (2). The medical catheter passes through the rotating roller (4) and the bottom roller (3) in sequence. The roller body clamping mechanism includes a clamping tube (5) and a clamping rod (6). A rotating sleeve (7) is rotatably installed on the outer wall of the clamping tube (5). A rotary push groove (8) is opened on the inner wall of the rotating sleeve (7). A rotary insert (9) is rotatably installed on the inner wall of the rotating sleeve (7). A rotary push spring (10) is installed between the rotary insert (9) and the rotary push groove (8). The rotary push spring (10) can push the rotary insert (9) into the side wall of the clamping rod (6) so that the clamping rod (6) is fixed in the clamping tube (5).

2. The drawstring structure of a medical catheter according to claim 1, characterized in that: The stabilizing mechanism includes a bottom ball ring (11) and a connecting plate (12). The connecting plate (12) is installed at the bottom end of the side wall of the clamping tube (5). The bottom ball ring (11) is installed at the bottom end of the rotating sleeve (7). The top end of the connecting plate (12) is equipped with a centripetal rail (13). A pair of shrinking blocks (14) are installed on the centripetal rail (13) in a centripetal sliding manner. There are multiple sets of centripetal rails (13) and shrinking blocks (14). A shrinking spring (15) is installed inside the shrinking block (14). The ball block at the bottom end of the bottom ball ring (11) passes through different shrinking blocks (14) in sequence, so that the bottom ball ring (11) and the rotating sleeve (7) rotate stably. The reverse rotation of the rotating sleeve (7) causes the side wall groove of the clamping tube (5) to push the rotating insert (9) to rotate in the opposite direction.

3. The drawstring structure of a medical catheter according to claim 1, characterized in that: The bottom end of the pull wire frame (1) is provided with a bottom bracket (16), and the bottom bracket (16) is installed at the external installation position.

4. The drawstring structure of a medical catheter according to claim 2, characterized in that: The pull frame (1) is equipped with a limiting turntable (17) on both sides for rotatable positioning, and one end of the rotating frame (2) is connected to the limiting turntable (17).

5. The drawstring structure of a medical catheter according to claim 4, characterized in that: Side plates (18) are installed on both sides of the turntable (17). The connecting plate (12) of the side wall of the clamping pipe (5) is fixedly installed on the side plate (18). The pull wire frame (1) is provided with adjustment holes (19), and multiple sets of adjustment holes (19) are provided.

6. The drawstring structure of a medical catheter according to claim 5, characterized in that: One end of the snap-fit ​​rod (6) is equipped with a limiting block (20), and the snap-fit ​​rod (6) can pass through different adjustment holes (19), side plates (18) and pull wire frame (1) to engage with the snap-fit ​​tube (5) to fix the limiting turntable (17) on both sides of the pull wire frame (1).

7. The drawstring structure of a medical catheter according to claim 1, characterized in that: Fixed rollers (21) are fixedly installed on both sides of the wire frame (1). The medical catheter passes through the fixed roller (21), the rotating roller (4) and the bottom roller (3) in sequence. The rotation of the rotating roller (4) pulls the movement of the catheter.

8. The drawstring structure of a medical catheter according to claim 1, characterized in that: The side wall of the snap-fit ​​rod (6) is provided with a snap-fit ​​groove (22), and the swivel insert (9) can rotate to extend into or away from the snap-fit ​​groove (22).

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