A stone-retrieving mechanism with adjustable clamping force

Abstract

This utility model discloses a stone-retrieving mechanism with adjustable clamping force, including an outer tube. A traction wire is installed inside the outer tube. Two sets of connecting wires are symmetrically arranged at the tail end of the traction wire. Two sets of limiting threads are symmetrically arranged at the tail ends of the two sets of connecting wires. A fixing cylinder is fitted onto the top of the outer tube. A fixing frame is installed on the fixing cylinder. A connecting shaft is installed on the fixing frame via a linear bearing. The bottom end of the connecting shaft is connected to the top end of the traction wire. A locking pin is threaded on the side wall of the fixing frame. The inner end of the locking pin abuts against the connecting shaft, and the outer end is equipped with an adjustment knob. A first handle is installed at the top of the fixing frame, and a second handle is installed on the connecting shaft. This utility model can improve the convenience and flexibility of stone retrieval during crushing and stone removal, thus enhancing the ease of stone retrieval.

Description

Technical Field

[0001] This utility model relates to the field of stone extraction technology, and more specifically, to a stone extraction mechanism with adjustable clamping force. Background Technology

[0002] During kidney stone surgery, the broken stone fragments need to be removed using a stone retrieval mechanism. Most existing stone retrieval mechanisms use stone retrieval baskets, but these baskets have complex structures and small openings for stone retrieval, resulting in poor convenience during stone retrieval and difficulty in allowing stone fragments to enter the basket. This also reduces the flexibility and convenience of operation. For example, a medical stone retrieval basket is provided in Chinese patent document CN217066520U, and a medical endoscopic stone retrieval basket is provided in Chinese patent document CN202859224U.

[0003] In addition, most existing stone-collecting baskets are installed inside the outer tube by a traction wire, and can only be pushed and pulled inside the outer tube. They cannot flexibly adjust the angle when collecting stones according to the shape of the gravel, which affects the convenience of operation.

[0004] Furthermore, existing stone retrieval mechanisms use a fixed driving force when moving the adjustable basket during stone retrieval. This prevents flexible adjustment of the pushing and pulling force according to the doctor's operating habits, resulting in poor control over the stone retrieval force when clamping and retrieving stones through the basket. The precision during pushing and pulling is also poor, making it inconvenient to perform accurate stone retrieval operations. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a stone-retrieving mechanism with adjustable clamping force, thereby solving the technical problem mentioned in the background art that the opening of the stone-retrieving mechanism in the prior art is small, making it inconvenient to flexibly adjust the stone-retrieving angle and stone-retrieving force.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An adjustable clamping force stone-retrieving mechanism includes an outer tube, inside which a traction wire is installed. Two sets of connecting wires are symmetrically arranged at the tail end of the traction wire. Two sets of limiting threads are symmetrically arranged at the tail ends of the two sets of connecting wires. A fixing cylinder is fitted on the top of the outer tube. A fixing frame is installed on the fixing cylinder. A connecting shaft is installed on the fixing frame via a linear bearing. The bottom end of the connecting shaft is connected to the top end of the traction wire. A locking pin is threaded on the side wall of the fixing frame. The inner end of the locking pin abuts against the connecting shaft, and the outer end is provided with an adjustment knob. A first handle is provided on the top of the fixing frame, and a second handle is provided on the connecting shaft.

[0010] The present invention is further provided that a third handle is provided on the side of the fixed cylinder away from the first handle and the second handle. During operation, the third handle can be held with the other hand, thereby stabilizing the fixed cylinder and improving the convenience and stability of the overall operation.

[0011] The present invention is further configured such that the ends of the two sets of limiting threads are integrally provided with a first connecting ring, and the connecting thread is provided with a second connecting ring. The first connecting ring and the second connecting ring are nested together. The arrangement of the first and second rings can realize the movable connection between the limiting thread and the connecting thread, thereby avoiding the situation where the connection between the connecting thread and the limiting thread breaks due to reciprocating folding, and improving the stability during stone removal.

[0012] The present invention is further configured such that the fixing frame includes a connecting frame, one end of the connecting frame is connected to the fixing cylinder, and the other end is provided with a fixing seat. The connecting shaft is mounted on the fixing seat through a linear bearing. The connecting seat enables the fixing seat to be stably installed on the fixing cylinder, thereby achieving the stable installation of the connecting shaft and providing a movement limit effect for the pulling of the traction wire.

[0013] The present invention is further configured such that the inner end of the locking column is provided with a pressing block via a bearing, the inner end of the pressing block is provided with a pressing groove, and the inner surface of the pressing groove is provided with a damping pad. The pressing block abuts against the inner surface of the connecting shaft via the damping pad. When the connecting shaft is squeezed by the locking column, the inward movement of the locking column will drive the pressing block to move inward. By adjusting the squeezing force between the damping pad and the connecting shaft, the friction force is adjusted when the connecting shaft moves, thereby adjusting the traction force of the traction rope when performing stone retrieval operations.

[0014] The present invention is further configured such that an adjustment groove is provided on the fixed base, the locking pin is threaded in the adjustment groove, a limiting slide groove is provided in the adjustment groove, and the pressing block is slidably located in the limiting slide groove. The adjustment groove is used to realize the stable installation of the locking pin on the fixed base, and the limiting slide groove is used to realize the stable installation of the pressing block on the fixed base.

[0015] The present invention is further configured such that a limiting finger ring is provided on the second handle. When in use, a suitable finger other than the thumb is placed in the limiting finger ring to facilitate the adjustment of the movement and rotation of the second handle, thereby realizing the movement and rotation of the traction wire driven by the connecting shaft.

[0016] The present invention is further provided with a limiting plate at the top of the connecting shaft. The limiting plate can prevent the connecting shaft from detaching from the fixed seat and improve the installation stability of the connecting shaft on the fixed seat.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a stone-retrieving mechanism with adjustable clamping force, which has the following beneficial effects:

[0019] 1. This utility model features two sets of connecting wires symmetrically arranged at the tail end of the traction wire, and two sets of limiting sleeves symmetrically arranged above and below the tail ends of the two sets of connecting wires. In use, by driving the traction wire to move, the limiting sleeves and connecting wires gradually extend out of the outer tube, thereby fitting the limiting sleeves and connecting wires onto the gravel. Then, pulling the traction wire causes the limiting sleeves, connecting wires, and outer tube to cooperate in limiting the gravel and forming a triangular locking structure. This allows for stable removal of the gravel. Furthermore, the larger openings below the connecting wires and limiting wires in this utility model facilitate the retrieval of the gravel, improving the flexibility and convenience of stone removal.

[0020] 2. In this utility model, the traction wire is set at the bottom of the connecting shaft, and the connecting shaft is mounted on the fixed seat through a bearing. In this way, when in use, the thumb of one hand is placed on the first handle, and the appropriate fingers other than the thumb of the same hand are placed in the limiting finger ring. The thumb and other fingers are pinched together, which allows the second handle to drive the connecting shaft to move on the fixed seat, thereby pulling the traction rope. This causes the connecting wire and the limiting thread to engage and lock the gravel out. During this process, the second handle can be adjusted by the fingers to rotate, thereby driving the connecting shaft to rotate on the fixed seat. The rotation of the connecting shaft can be used to control the rotation of the traction wire, and the rotation of the traction wire can drive the rotation of the connecting wire and the limiting thread, thereby adjusting the angle when grabbing the gravel, further improving the flexibility and convenience of gravel retrieval.

[0021] 3. This utility model features a locking pin on the fixed base of the fixed frame, along with a pressure block. During use, an adjustment knob can be turned to control the rotation of the locking pin. The threaded connection between the locking pin and the adjustment groove allows for inward or outward movement of the locking pin on the fixed base. The movement of the locking pin drives the movement of the pressure block, thereby adjusting the frictional damping between the damping pad on the pressure block and the connecting shaft. This allows for adjustment of the force required for the connecting shaft to rotate and move on the fixed base, enabling the clamping force to be adjusted according to the operator's needs when handling crushed stone, thus improving operational stability and comfort. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a stone-retrieving mechanism with adjustable clamping force according to this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of a stone-retrieving mechanism with adjustable clamping force according to this utility model. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of a partial connection structure between the traction wire, connecting wire, and limiting sleeve of this utility model;

[0025] Figure 4 This is a cross-sectional view of the mounting structure of the connecting shaft on the fixed base in this utility model;

[0026] Figure 5 This is an exploded cross-sectional view of the mounting structure of the connecting shaft on the fixed base in this utility model.

[0027] Figure 6 This utility model Figure 3 Enlarged view of the local structure of A in the diagram.

[0028] In the diagram: 1. Outer tube; 2. Traction wire; 3. Connecting wire; 4. Limiting thread; 5. Fixing cylinder; 6. Fixing frame; 7. Connecting shaft; 8. Locking pin; 9. Adjusting knob; 10. First handle; 11. Second handle; 12. Third handle; 13. First connecting ring; 14. Second connecting ring; 15. Connecting frame; 16. Fixing seat; 17. Pressing block; 18. Pressing groove; 19. Damping pad; 20. Adjusting groove; 21. Limiting slide groove; 22. Limiting finger ring; 23. Limiting plate. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Please see Figures 1-6 A stone-retrieving mechanism with adjustable clamping force includes an outer tube 1, a traction wire 2 is provided inside the outer tube 1, two sets of connecting wires 3 are symmetrically arranged at the tail end of the traction wire 2, and two sets of limiting sleeves 4 are symmetrically arranged at the tail end of the two sets of connecting wires 3.

[0033] In use, by driving the traction wire 2 to move, the limiting thread 4 and the connecting thread 3 gradually extend out of the outer tube 1, thereby putting the limiting thread 4 and the connecting thread 3 onto the gravel. Then, the traction wire 2 is pulled, so that the limiting thread 4, the connecting thread 3 and the outer tube 1 cooperate to limit the gravel and form a triangular locking structure. In this way, the gravel can be removed stably. Moreover, with this utility model, the openings below the connecting thread 3 and the limiting thread are large, which makes it easier to put the gravel on and improves the flexibility and convenience of stone removal.

[0034] A fixing cylinder 5 is fitted on the top of the outer tube 1. A fixing frame 6 is provided on the fixing cylinder 5. A connecting shaft 7 is provided on the fixing frame 6 via a linear bearing. The bottom end of the connecting shaft 7 is connected to the top end of the traction wire 2. A locking pin 8 is threaded on the side wall of the fixing frame 6. The inner end of the locking pin 8 abuts against the connecting shaft 7, and the outer end is provided with an adjustment knob 9. A first handle 10 is provided on the top of the fixing frame 6, and a second handle 11 is provided on the connecting shaft 7.

[0035] Please see Figures 1-6 As one embodiment of the fixed cylinder 5: a third handle 12 is provided on the side of the fixed cylinder 5 away from the first handle 10 and the second handle 11. During operation, the third handle 12 can be held with the other hand, thereby stabilizing the fixed cylinder 5 and improving the convenience and stability of the overall operation.

[0036] Please see Figures 1-6As one implementation of the limiting thread 4: the ends of the two sets of limiting thread 4 are integrally provided with a first connecting ring 13, and the connecting wire 3 is provided with a second connecting ring 14. The first connecting ring 13 and the second connecting ring 14 are nested together. The setting of the first ring and the second ring can realize the movable connection at the connection between the limiting thread 4 and the connecting wire 3, thereby avoiding the situation where the connection between the connecting wire 3 and the limiting thread 4 breaks due to reciprocating folding, and improving the stability of the stone retrieval basket structure.

[0037] Please see Figures 1-6 As one embodiment of the fixed frame 6: the fixed frame 6 includes a connecting frame 15, one end of the connecting frame 15 is connected to the fixed cylinder 5, and the other end is provided with a fixed seat 16. The connecting shaft 7 is installed on the fixed seat 16 through a linear bearing. The fixed seat 16 is stably installed on the fixed cylinder 5 through the connecting seat, thereby achieving stable installation of the connecting shaft 7 and providing a movement limit effect for the pulling of the traction wire 2.

[0038] Please see Figures 1-6 As one embodiment of the locking pin 8: the inner end of the locking pin 8 is provided with a pressing block 17 via a bearing, the inner end of the pressing block 17 is provided with a pressing groove 18, and the inner surface of the pressing groove 18 is provided with a damping pad 19. The pressing block 17 abuts against the inner surface of the connecting shaft 7 through the damping pad 19. When the connecting shaft 7 is squeezed by the locking pin 8, the inward movement of the locking pin 8 will drive the pressing block 17 to move inward. By adjusting the squeezing force between the damping pad 19 and the connecting shaft 7, the friction force is adjusted when the connecting shaft 7 moves, thereby adjusting the traction force of the traction rope when performing the stone retrieval operation.

[0039] Please see Figures 1-6 As one embodiment of the fixed base 16: the fixed base 16 is provided with an adjustment groove 20, the locking pin 8 is threaded in the adjustment groove 20, the adjustment groove 20 is provided with a limiting slide groove 21, and the pressing block 17 is slidably located in the limiting slide groove 21. The adjustment groove 20 is used to realize the stable installation of the locking pin 8 on the fixed base 16, and the limiting slide groove 21 is used to realize the stable installation of the pressing block 17 on the fixed base 16.

[0040] Please see Figures 1-6 As one implementation of the second handle 11: a limiting finger ring 22 is provided on the second handle 11. When in use, a suitable finger other than the thumb is placed in the limiting finger ring 22 to facilitate the adjustment of the movement and rotation of the second handle 11, thereby enabling the connecting shaft 7 to drive the traction wire 2 to move and rotate.

[0041] Please see Figures 1-6As one implementation of the connecting shaft 7: a limiting plate 23 is provided at the top of the connecting shaft 7. The limiting plate 23 can prevent the connecting shaft 7 from detaching from the fixed seat 16 and improve the installation stability of the connecting shaft 7 on the fixed seat 16.

[0042] In summary:

[0043] This invention features two sets of connecting wires 3 symmetrically arranged at the tail end of the traction wire 2, and two sets of limiting sleeves 4 symmetrically arranged above and below the tail ends of the two sets of connecting wires 3. In use, by driving the traction wire 2 to move, the limiting sleeves 4 and connecting wires 3 gradually extend out of the outer tube 1, thereby fitting the limiting sleeves 4 and connecting wires 3 onto the gravel. Then, the traction wire 2 is pulled, so that the limiting sleeves 4, connecting wires 3, and outer tube 1 cooperate to limit the gravel and form a triangular locking structure. In this way, the gravel can be stably removed. Furthermore, with this invention, the openings below the connecting wires 3 and limiting wires are relatively large, which facilitates the removal of gravel and improves the flexibility and convenience of stone removal.

[0044] In this invention, the traction wire 2 is placed at the bottom end of the connecting shaft 7, and the connecting shaft 7 is mounted on the fixed seat 16 via a bearing. In this way, when in use, the thumb of one hand is placed on the first handle 10, and the appropriate fingers other than the thumb of the same hand are placed in the limiting finger ring 22. The thumb and other fingers are pinched together, so that the second handle 11 can drive the connecting shaft 7 to move on the fixed seat 16, thereby pulling the traction rope, so that the connecting wire 3 and the limiting sleeve 4 cooperate to lock and pull out the gravel. During this process, the second handle 11 can be rotated by the fingers, thereby driving the connecting shaft 7 to rotate on the fixed seat 16. The rotation of the connecting shaft 7 can be used to control the rotation of the traction wire 2, and the rotation of the traction wire 2 can drive the rotation of the connecting wire 3 and the limiting sleeve 4, thereby adjusting the angle when picking up the gravel, further improving the flexibility and convenience of gravel picking.

[0045] This utility model features a locking pin 8 on the fixed seat 16 of the fixed frame 6, and a pressing block 17 is provided in conjunction with the locking pin 8. During use, the adjusting knob 9 can be turned to control the rotation of the locking pin 8. The threaded engagement between the locking pin 8 and the adjusting groove 20 allows the locking pin 8 to move inward or outward on the fixed seat 16. The movement of the locking pin 8 drives the movement of the pressing block 17, thereby adjusting the frictional damping between the damping pad 19 on the pressing block 17 and the connecting shaft 7. This allows for adjustment of the force required for the connecting shaft 7 to rotate and move on the fixed seat 16, thus enabling adjustment of the clamping force required by the operator when handling gravel, improving operational stability and comfort.

[0046] In all the solutions mentioned above, 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 the 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 principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0047] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here.

[0048] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

[0049] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here.

Claims

1. A lithotriptor with adjustable clamping force, comprising an outer tube (1), the inside of which is provided with a traction wire (2), characterized in that: Two sets of connecting wires (3) are symmetrically arranged at the tail end of the traction wire (2). Two sets of limiting sleeves (4) are symmetrically arranged at the tail ends of the two sets of connecting wires (3). A fixing cylinder (5) is sleeved on the top of the outer tube (1). A fixing frame (6) is provided on the fixing cylinder (5). A connecting shaft (7) is provided on the fixing frame (6) through a linear bearing. The bottom end of the connecting shaft (7) is connected to the top end of the traction wire (2). A locking pin (8) is threaded on the side wall of the fixing frame (6). The inner end of the locking pin (8) abuts against the connecting shaft (7), and the outer end is provided with an adjustment knob (9). A first handle (10) is provided on the top end of the fixing frame (6), and a second handle (11) is provided on the connecting shaft (7).

2. The stone extraction device of claim 1, wherein: A third handle (12) is provided on the side of the fixed cylinder (5) away from the first handle (10) and the second handle (11).

3. The stone extraction device of claim 1, wherein: The ends of the two sets of limiting threads (4) are integrally provided with a first connecting ring (13), and the connecting thread (3) is provided with a second connecting ring (14). The first connecting ring (13) and the second connecting ring (14) are nested together.

4. The stone extraction device of any one of claims 1-3, wherein: The fixing frame (6) includes a connecting frame (15), one end of which is connected to the fixing cylinder (5), and the other end is provided with a fixing seat (16). The connecting shaft (7) is mounted on the fixing seat (16) through a linear bearing.

5. The stone extraction device of claim 4, wherein: The inner end of the locking pin (8) is provided with a pressing block (17) through a bearing. The inner end of the pressing block (17) is provided with a pressing groove (18). The inner surface of the pressing groove (18) is provided with a damping pad (19). The pressing block (17) abuts against the inner surface of the connecting shaft (7) through the damping pad (19).

6. The stone extraction device of claim 5, wherein: The fixed base (16) is provided with an adjustment groove (20), the locking pin (8) is threaded in the adjustment groove (20), the adjustment groove (20) is provided with a limit slide groove (21), and the pressing block (17) slides in the limit slide groove (21).

7. The stone extraction device of claim 1, wherein: The second handle (11) is provided with a limit ring (22).

8. The stone extraction device of claim 1, wherein: A limiting plate (23) is provided at the top of the connecting shaft (7).

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