A retraction handle

Abstract

The application belongs to the technical field of intravascular ultrasound catheter, in particular to a withdrawing handle, which comprises a box body, a main turntable is rotatably installed on the inner wall of one side of the box body, a hollow rotating cylinder is fixedly installed on one side of the main turntable, the hollow rotating cylinder is located on the outside of the box body, an installation disc is arranged on the side of the main turntable away from the hollow rotating cylinder, a driving assembly is arranged between the installation disc and the main turntable, the driving assembly is used for driving the catheter to rotate to realize the inspection work, and a withdrawing assembly is arranged on the side of the installation disc away from the main turntable. The driving assembly drives the main turntable and the installation disc to rotate, the main turntable makes the hollow rotating cylinder and the catheter passing through it rotate, the requirement of the catheter rotation during detection is met, the withdrawing assembly is started to pull the catheter to move outward and wind, the withdrawing is realized, and the two work cooperatively, so that the catheter can rotate as required and be withdrawn smoothly during the detection process, and the continuity and effectiveness of the detection work are ensured.

Description

Technical Field

[0001] This invention belongs to the field of intravascular ultrasound catheter technology, specifically a retractable handle. Background Technology

[0002] Intravascular ultrasound (IVUS), as an advanced medical imaging technology, plays a vital role in the diagnosis and treatment of cardiovascular diseases. An IVUS catheter is inserted into a blood vessel through puncture, and an ultrasound probe is used to image the vessel wall, clearly displaying information such as the vessel wall structure, plaque characteristics, and the morphology of the vessel lumen. During IVUS catheterization, the retraction handle is a key component controlling the movement of the IVUS catheter within the blood vessel. Once the IVUS catheter reaches the target vessel position, it needs to be slowly and evenly retracted using the retraction handle, allowing the ultrasound probe to continuously scan the vessel wall and acquire complete vascular images. The performance of the retraction handle directly affects the quality and effectiveness of the IVUS catheterization examination.

[0003] Currently, traditional retraction handles used for IVUS catheters mainly employ a linear sliding platform structure. This structure typically consists of a guide rail, a slider, and a drive mechanism. The IVUS catheter is fixed to the slider, and the drive mechanism moves the slider linearly along the guide rail, thus retracting the catheter. The retraction distance of the linear sliding platform structure is strictly limited by the length of the guide rail. Since the length of the guide rail is fixed, the retraction stroke of the catheter is also limited to a finite range. In practical applications, for some long vascular lesions or situations requiring large-area scanning, traditional retraction handles cannot meet the examination requirements. It may be necessary to adjust the catheter position multiple times for segmented scanning, which not only increases the complexity and time cost of the operation but may also lead to inaccurate stitching between scan images, affecting the accuracy of diagnosis.

[0004] Therefore, the present invention provides a retraction handle. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a retraction handle, including a housing, a main turntable rotatably mounted on one inner wall of the housing, a hollow rotating cylinder fixedly mounted on one side of the main turntable, the hollow rotating cylinder being located on the outside of the housing, an installation plate being provided on the side of the main turntable away from the hollow rotating cylinder, a driving assembly being provided between the installation plate and the main turntable, the driving assembly being used to drive the guide tube to rotate to achieve inspection work, and a retraction assembly being provided on the side of the installation plate away from the main turntable, the retraction assembly being used to drive the guide tube to retract.

[0007] Preferably, the drive assembly includes a connecting wheel, which is fixedly installed on the outer wall of the main turntable. The outer wall of the connecting wheel is fixedly connected to the outer wall of the mounting plate. A rotary drive motor is fixedly installed on the inner wall of the housing. A drive wheel is fixedly installed on the output shaft of the rotary drive motor. A drive belt is installed between the drive wheel and the connecting wheel for transmission.

[0008] Preferably, the retraction assembly includes positioning plates. Two positioning plates are symmetrically and fixedly installed on the outer wall of the mounting plate. A mounting base is fixedly installed between the two positioning plates. Two rotating shafts are rotatably installed on the inner wall of the mounting base. Retraction wheels are fixedly installed on the outer walls of the two rotating shafts. The retraction wheels are located inside the mounting base. A power assembly is provided on one side of the mounting base. A winding assembly is provided on the side of the mounting base away from the mounting plate.

[0009] Preferably, the power assembly includes a retraction drive motor, which is fixedly mounted on one side of the mounting base. The output end of the retraction drive motor is fixedly connected to one end of one of the rotating shafts. Gears are fixedly mounted on the outer walls of both rotating shafts, and the teeth of the two gears mesh with each other.

[0010] Preferably, the winding assembly includes a drive shaft, a winding wheel is fixedly installed on the outer wall of the drive shaft, a knob is fixedly installed at one end of the drive shaft, a support assembly is installed between the drive shaft and the mounting plate, and a transmission assembly is provided between the drive shaft and the rotating shaft.

[0011] Preferably, the support assembly includes a secondary turntable, which is rotatably mounted on the inner wall of the housing. Horizontal plates are symmetrically fixedly mounted on the outer wall of the secondary turntable, with the ends of the horizontal plates away from the secondary turntable fixedly connected to the mounting plate. The drive shaft is rotatably mounted between the two horizontal plates.

[0012] Preferably, the transmission assembly includes a transmission wheel A and a transmission wheel B. The transmission wheel A is fixedly installed at one end of the transmission shaft, and the transmission wheel B is fixedly installed at one end of the rotating shaft. A transmission belt is installed between the transmission wheel B and the transmission wheel A.

[0013] Preferably, a receiving box is provided between the two horizontal plates, and two sets of receiving blocks are symmetrically fixedly installed on the outer wall of the receiving box. The two sets of receiving blocks are respectively fixedly connected to the two horizontal plates. A wire inlet window is fixedly installed on one side of the receiving box, and the outer wall of the wire inlet window is fixedly connected to the outer wall of the mounting base. A wire through hole is opened on the side of the receiving box away from the wire inlet window.

[0014] Preferably, a flip cover A is rotatably installed on the inner wall of the container, and a flip cover B is fixedly installed on the outer wall of the flip cover A. The inner wall of the flip cover B is symmetrically provided with butterfly bolts, and the flip cover B is fixedly connected to the inlet window through the butterfly bolts.

[0015] Preferably, the top of the housing is hinged with a top cover, and both the top cover and the inner wall of the housing are fixedly installed with transparent observation windows. A control box is fixedly installed at the bottom of the housing, and a control panel is fixedly installed on the inner wall of the control box. A handle is fixedly installed on the outer wall of the sub-turntable.

[0016] The beneficial effects of this invention are as follows: 1. The drive component drives the main turntable and the mounting plate to rotate. The main turntable causes the hollow rotating cylinder and the tube passing through it to rotate, which meets the requirement of tube rotation during testing. After the retraction component is activated, it pulls the tube outward and rewinds it to achieve retraction. The two work together to ensure that the tube can rotate as needed and retract smoothly during the testing process, thus ensuring the continuity and effectiveness of the testing work.

[0017] 2. The retraction component is fixed to the mounting plate and rotates synchronously with the hollow rotating cylinder, avoiding torsional torque caused by differences in the rotation of different components during the retraction process of the conduit. This prevents the conduit from twisting and ensures that it can rotate continuously and normally, improving the accuracy and reliability of the inspection. The conduit is wound up by the retraction component, breaking the limitation of the traditional linear guide travel. Long-distance conduit retraction can be achieved in small spaces, greatly expanding the scope of application of the equipment, especially suitable for working environments with limited space.

[0018] 3. The linear speed of the winding assembly is slightly less than that of the retraction wheel. Therefore, the retraction speed of the guide tube is controlled by the rotation speed of the retraction wheel. This speed difference can prevent the retraction speed from changing due to the increase in the amount of guide tube winding during the winding process. No matter how much guide tube is wound on the winding assembly, the retraction wheel can stably drive the guide tube to retract at the set speed, ensuring the continuity and stability of the inspection work. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the box structure of the present invention; Figure 3 This is a schematic diagram of the structure at the horizontal plate of the present invention; Figure 4 This is a schematic diagram of the structure of the main turntable of the present invention; Figure 5 This is a schematic diagram of the installation disk structure of the present invention; Figure 6 This is a schematic diagram of the mounting base structure of the present invention; Figure 7 This is a schematic diagram of the structure at the winding wheel of the present invention; Figure 8 This is a schematic diagram of the structure of the receiving box of the present invention.

[0021] In the diagram: 1. Housing; 2. Main turntable; 3. Hollow rotating cylinder; 4. Mounting plate; 5. Connecting wheel; 6. Rotation drive motor; 7. Drive wheel; 8. Drive belt; 9. Positioning plate; 10. Mounting base; 11. Shaft; 12. Retraction wheel; 13. Retraction drive motor; 14. Gear; 15. Drive shaft; 16. Rewinding wheel; 17. Knob; 18. Secondary turntable; 19. Horizontal plate; 20. Drive wheel A; 21. Drive wheel B; 22. Drive belt; 23. Receiving box; 24. Receiving block; 25. Cable inlet window; 26. Cable threading hole; 27. Flip cover A; 28. Flip cover B; 29. ​​Wing bolt; 30. Top cover; 31. Transparent observation window; 32. Control box; 33. Control panel; 34. Handle. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 7As shown in the embodiment of the present invention, a retraction handle includes a housing 1. A main turntable 2 is rotatably mounted on the inner wall of one side of the housing 1. A hollow rotating cylinder 3 is fixedly mounted on one side of the main turntable 2, located on the outer side of the housing 1. A mounting plate 4 is provided on the side of the main turntable 2 away from the hollow rotating cylinder 3. A driving assembly is provided between the mounting plate 4 and the main turntable 2. The driving assembly is used to drive the guide tube to rotate for inspection. A retraction assembly is provided on the side of the mounting plate 4 away from the main turntable 2. The retraction assembly is used to drive the guide tube to retract. During retraction, one end of the guide tube is passed through the hollow rotating cylinder 3 and the retraction... The retraction component is connected, and the drive component and retraction component are activated. The drive component drives the main turntable 2 and the mounting plate 4 to rotate together. When the main turntable 2 rotates, it drives the hollow rotating cylinder 3 to rotate, which in turn drives the guide tube to rotate, thus achieving the self-rotation of the guide tube during testing. After the retraction component is activated, its movement pulls the guide tube outward and rewinds it, thereby achieving the retraction of the guide tube. The retraction component is fixed to the mounting plate 4, allowing it to rotate synchronously with the hollow rotating cylinder 3. This synchronous rotation of the retraction component and the hollow rotating cylinder 3 ensures the guide tube can retract smoothly. No torsional torque is generated during the retraction process, thus preventing wire twisting and ensuring the normal rotation of the guide tube. The guide tube is wound up by the retraction component, allowing it to wrap around the component. This eliminates the limitation of guide rail length during retraction, breaking through the stroke limitation of traditional linear guide rails and enabling long retraction in a small space. In summary, the drive component drives the main turntable 2 and the mounting plate 4 to rotate. The main turntable 2 causes the hollow rotating cylinder 3 and the guide tube passing through it to rotate, meeting the guide tube rotation requirements during testing. After the retraction component is activated, it pulls the guide tube outward and winds it up, achieving retraction. The two work together to allow the guide tube to rotate as needed during testing. The self-rotation and smooth retraction ensure the continuity and effectiveness of the testing work. The retraction component is fixed to the mounting plate 4 and rotates synchronously with the hollow rotating cylinder 3, avoiding the torsional torque caused by the difference in rotation of different parts during the retraction of the guide tube, preventing the wire from twisting, and ensuring that the guide tube can rotate continuously and normally, thus improving the accuracy and reliability of the testing. The guide tube is wound up by the retraction component, breaking the limitation of the traditional linear guide travel. Long-distance guide tube retraction can be achieved in small spaces, greatly expanding the scope of application of the equipment, especially suitable for working environments with limited space.

[0024] like Figures 2 to 5As shown, the drive assembly includes a connecting wheel 5, which is fixedly installed on the outer wall of the main turntable 2. The outer wall of the connecting wheel 5 is fixedly connected to the outer wall of the mounting plate 4. A rotary drive motor 6 is fixedly installed on the inner wall of the housing 1. A drive wheel 7 is fixedly installed on the output shaft of the rotary drive motor 6. A drive belt 8 is installed between the drive wheel 7 and the connecting wheel 5 for transmission. When the rotary drive motor 6 is started, it drives the drive wheel 7 to rotate. When the drive wheel 7 rotates, it drives the connecting wheel 5 to rotate through the drive belt 8. Since both the main turntable 2 and the mounting plate 4 are fixed to the connecting wheel 5, the rotation of the connecting wheel 5 will drive the main turntable 2 and the mounting plate 4 to rotate synchronously, thereby providing power for the operation of the device.

[0025] like Figure 3 and Figures 5 to 7 As shown, the retraction assembly includes positioning plates 9. Two positioning plates 9 are symmetrically and fixedly installed on the outer wall of the mounting plate 4. A mounting base 10 is fixedly installed between the two positioning plates 9. Two rotating shafts 11 are rotatably installed on the inner wall of the mounting base 10. Retraction wheels 12 are fixedly installed on the outer wall of each of the two rotating shafts 11. The retraction wheels 12 are located inside the mounting base 10. A power assembly is provided on one side of the mounting base 10, and a winding assembly is provided on the side of the mounting base 10 away from the mounting plate 4. One end of the guide tube is passed through the space between the two retraction wheels 12 and fixed to the winding assembly. After the power assembly is started, the power assembly will drive the two retraction wheels 12 to retract. The retraction wheel 12 rotates synchronously in opposite directions, thereby driving the guide tube to move and realize the retraction of the guide tube. While the retraction wheel 12 drives the guide tube to move, the winding assembly rotates to wind the guide tube. The linear speed of the winding assembly is slightly less than the linear speed of the retraction wheel 12. Therefore, the retraction speed of the guide tube is controlled by the rotation speed of the retraction wheel 12. This speed difference can prevent the problem of the retraction speed changing due to the increase of the guide tube winding during the winding process. No matter how much guide tube is wound on the winding assembly, the retraction wheel 12 can stably drive the guide tube to retract at the set speed, ensuring the continuity and stability of the inspection work.

[0026] like Figure 6 As shown, the power assembly includes a retraction drive motor 13, which is fixedly mounted on one side of the mounting base 10. The output end of the retraction drive motor 13 is fixedly connected to one end of one of the rotating shafts 11. Gears 14 are fixedly mounted on the outer walls of both rotating shafts 11, and the teeth of the two gears 14 mesh with each other. After the retraction drive motor 13 is started, it will drive one of the rotating shafts 11 to rotate. When the rotating shaft 11 rotates, it will drive the corresponding retraction wheel 12 and gear 14 to rotate. Since the two gears 14 mesh with each other, the other gear 14 will rotate synchronously in the opposite direction. This gear 14 will then drive the other retraction wheel 12 to rotate through the corresponding rotating shaft 11, thereby causing the two retraction wheels 12 to rotate synchronously in the opposite direction, providing power for the retraction of the conduit.

[0027] like Figure 3 and Figure 7 As shown, the winding assembly includes a drive shaft 15, a winding wheel 16 fixedly mounted on the outer wall of the drive shaft 15, a knob 17 fixedly mounted on one end of the drive shaft 15, a support assembly installed between the drive shaft 15 and the mounting plate 4, and a transmission assembly provided between the drive shaft 15 and the rotating shaft 11. The support assembly supports the drive shaft 15, positioning the winding wheel 16 in a suitable position for easy winding. Simultaneously, the support assembly allows the winding wheel 16 to rotate synchronously with the mounting plate 4, preventing the guide tube from twisting. During operation, one end of the guide tube is fixed to the winding wheel 16. When the transmission assembly drives the winding wheel 16 to rotate, the winding wheel 16 winds the guide tube around its surface. The take-up reel 16 provides a collection point for the catheter. Within a small space, the take-up reel 16 can continuously wind the catheter. As the retraction operation proceeds, the catheter can be continuously collected onto the take-up reel 16, thus enabling the retraction of long-distance catheters. This is very suitable for scenarios that require operation in a limited space but need to handle long catheters. It greatly expands the application range of the retraction handle, breaks the limitations of the traditional linear guide travel, and enables long-distance catheter retraction in a small space. The stable winding process also facilitates the subsequent use and management of the catheter, improving work efficiency. The angle of the take-up reel 16 can be adjusted by the knob 17, which facilitates the fixing of the end of the catheter.

[0028] like Figure 3 and Figure 7 As shown, the support assembly includes a secondary turntable 18, which is rotatably mounted on the inner wall of the housing 1. Horizontal plates 19 are symmetrically fixedly mounted on the outer wall of the secondary turntable 18. The ends of the horizontal plates 19 furthest from the secondary turntable 18 are fixedly connected to the mounting plate 4. A drive shaft 15 is rotatably mounted between the two horizontal plates 19. The horizontal plates 19 position the drive shaft 15, thereby setting the winding wheel 16 in a suitable position for winding operations. Since the horizontal plates 19 are connected to the mounting plate 4, they rotate synchronously with the mounting plate 4, allowing the winding wheel 16 to rotate synchronously with the mounting plate 4. This prevents the winding wheel 16 from twisting during the winding of the guide tube. The secondary turntable 18 is rotatably mounted inside the housing 1 and fixed to the other end of the horizontal plates 19, supporting the horizontal plates 19 and ensuring their stability during rotation.

[0029] like Figures 6 to 7As shown, the transmission assembly includes a transmission wheel A20 and a transmission wheel B21. The transmission wheel A20 is fixedly installed at one end of the transmission shaft 15, and the transmission wheel B21 is fixedly installed at one end of the rotating shaft 11. A transmission belt 22 is installed between the transmission wheel B21 and the transmission wheel A20. When the retraction drive motor 13 drives the rotating shaft 11 to rotate, the rotating shaft 11 will drive the transmission wheel B21 to rotate. When the transmission wheel B21 rotates, it will drive the transmission wheel A20 to rotate through the transmission belt 22, thereby providing power for the rotation of the take-up reel 16. By designing the ratio of the transmission wheel B21 to the transmission wheel A20, the relative adjustment of the linear speed of the retraction reel 12 and the take-up reel 16 can be achieved.

[0030] like Figure 3 , Figure 5 and Figure 8 As shown, a receiving box 23 is arranged between two horizontal plates 19. Two sets of receiving blocks 24 are symmetrically fixedly installed on the outer wall of the receiving box 23. The two sets of receiving blocks 24 are respectively fixedly connected to the two horizontal plates 19. A wire inlet window 25 is fixedly installed on one side of the receiving box 23. The outer wall of the wire inlet window 25 is fixedly connected to the outer wall of the mounting base 10. A wire through hole 26 is opened on the side of the receiving box 23 away from the wire inlet window 25. The receiving box 23 is installed inside the two horizontal plates 19 through the receiving blocks 24, so that the receiving box 23 is located between the retraction wheel 12 and the winding wheel 16. When the guide tube reaches the winding wheel 16 from the retraction wheel 12, it will enter the receiving box 23 through the wire inlet window 25, and then exit through the wire through hole 26. The conduit located between the retractor 12 and the take-up reel 16 is collected by the receiving box 23. During the retraction process, the retractor 12 and the take-up reel 16 will continue to rotate. If the conduit located between the retractor 12 and the take-up reel 16 is not effectively restrained and protected, it is easy to be thrown out and collide with the equipment when the device rotates at high speed. The setting of the receiving box 23 provides a relatively closed and safe space for this part of the conduit. After the conduit comes out of the retractor 12, it enters the receiving box 23 through the inlet window 25, and then passes out through the wire hole 26 to reach the take-up reel 16. This makes the conduit "enclosed" by the receiving box 23 during the retraction process, which greatly reduces the risk of being thrown out and damaged.

[0031] like Figure 8 As shown, a flip cover A27 is rotatably mounted on the inner wall of the receiving box 23, and a flip cover B28 is fixedly mounted on the outer wall of the flip cover A27. A butterfly bolt 29 is symmetrically arranged on the inner wall of the flip cover B28, and the flip cover B28 is fixedly connected to the inlet window 25 via the butterfly bolt 29. The design of the butterfly bolt 29 makes the fixing and loosening of the flip cover B28 and the inlet window 25 extremely simple. Operators do not need additional tools; they can easily release the flip cover B28 from the inlet window 25 by manually rotating the butterfly bolt 29, thereby opening the flip cover A27 and the flip cover B28 outwards. This significantly saves time and improves work efficiency when operating on the inside of the receiving box 23.

[0032] like Figures 1 to 2 As shown, a top cover 30 is hinged to the top of the housing 1. Transparent observation windows 31 are fixedly installed on both the top cover 30 and the inner wall of the housing 1. A control box 32 is fixedly installed on the bottom of the housing 1. A control panel 33 is fixedly installed on the inner wall of the control box 32. A handle 34 is fixedly installed on the outer wall of the auxiliary turntable 18. The top cover 30 provides physical protection for the internal structure of the entire device. During the use, transportation or storage of the device, the top cover 30 can prevent dust, debris and other objects from entering the interior of the housing 1. The transparent observation window 31 provides the operator with a window to directly observe the internal operation of the device. The control panel 33 can display the operating status of the device in real time, which makes it convenient for the operator to understand the working status of the device in a timely manner and make corresponding operating decisions. The handle 34 on the outer wall of the auxiliary turntable 18 provides the operator with a way to manually rotate the device.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retractable handle, comprising a housing (1), characterized in that: A main turntable (2) is rotatably mounted on one side of the inner wall of the housing (1). A hollow rotating cylinder (3) is fixedly mounted on one side of the main turntable (2). The hollow rotating cylinder (3) is located on the outside of the housing (1). An installation plate (4) is provided on the side of the main turntable (2) away from the hollow rotating cylinder (3). A drive assembly is provided between the installation plate (4) and the main turntable (2). The drive assembly is used to drive the conduit to rotate to achieve the inspection work. A retraction assembly is provided on the side of the installation plate (4) away from the main turntable (2). The retraction assembly is used to drive the conduit to retract.

2. The retraction handle according to claim 1, characterized in that: The drive assembly includes a connecting wheel (5), which is fixedly installed on the outer wall of the main turntable (2). The outer wall of the connecting wheel (5) is fixedly connected to the outer wall of the mounting plate (4). A rotary drive motor (6) is fixedly installed on the inner wall of the housing (1). A drive wheel (7) is fixedly installed on the output shaft of the rotary drive motor (6). A drive belt (8) is installed between the drive wheel (7) and the connecting wheel (5).

3. A retraction handle according to claim 1, characterized in that: The retraction assembly includes positioning plates (9), two of which are symmetrically fixedly installed on the outer wall of the mounting plate (4). A mounting base (10) is fixedly installed between the two positioning plates (9). Two rotating shafts (11) are rotatably installed on the inner wall of the mounting base (10). Retraction wheels (12) are fixedly installed on the outer walls of the two rotating shafts (11). The retraction wheels (12) are located inside the mounting base (10). A power assembly is provided on one side of the mounting base (10). A winding assembly is provided on the side of the mounting base (10) away from the mounting plate (4).

4. A retraction handle according to claim 3, characterized in that: The power assembly includes a retraction drive motor (13), which is fixedly installed on one side of the mounting base (10). The output end of the retraction drive motor (13) is fixedly connected to one end of one of the rotating shafts (11). Gears (14) are fixedly installed on the outer walls of both rotating shafts (11), and the teeth of the two gears (14) mesh with each other.

5. A retraction handle according to claim 3, characterized in that: The winding assembly includes a drive shaft (15), a winding wheel (16) is fixedly installed on the outer wall of the drive shaft (15), a knob (17) is fixedly installed at one end of the drive shaft (15), a support assembly is installed between the drive shaft (15) and the mounting plate (4), and a transmission assembly is provided between the drive shaft (15) and the rotating shaft (11).

6. A retraction handle according to claim 5, characterized in that: The support assembly includes a secondary turntable (18), which is rotatably mounted on the inner wall of the housing (1). A horizontal plate (19) is symmetrically fixedly mounted on the outer wall of the secondary turntable (18). The end of the horizontal plate (19) away from the secondary turntable (18) is fixedly connected to the mounting plate (4). The drive shaft (15) is rotatably mounted between the two horizontal plates (19).

7. A retraction handle according to claim 5, characterized in that: The transmission assembly includes a transmission wheel A (20) and a transmission wheel B (21). The transmission wheel A (20) is fixedly installed at one end of the transmission shaft (15), and the transmission wheel B (21) is fixedly installed at one end of the rotating shaft (11). A transmission belt (22) is installed between the transmission wheel B (21) and the transmission wheel A (20).

8. A retraction handle according to claim 6, characterized in that: A receiving box (23) is provided between the two horizontal plates (19). Two sets of receiving blocks (24) are symmetrically fixedly installed on the outer wall of the receiving box (23). The two sets of receiving blocks (24) are respectively fixedly connected to the two horizontal plates (19). A wire inlet window (25) is fixedly installed on one side of the receiving box (23). The outer wall of the wire inlet window (25) is fixedly connected to the outer wall of the mounting base (10). A wire through hole (26) is opened on the side of the receiving box (23) away from the wire inlet window (25).

9. A retraction handle according to claim 8, characterized in that: The inner wall of the container (23) is rotatably mounted with a flip cover A (27), and the outer wall of the flip cover A (27) is fixedly mounted with a flip cover B (28). The inner wall of the flip cover B (28) is symmetrically provided with butterfly bolts (29), and the flip cover B (28) is fixedly connected to the inlet window (25) by the butterfly bolts (29).

10. A retraction handle according to claim 6, characterized in that: The top of the box (1) is hinged with a top cover (30), and both the top cover (30) and the inner wall of the box (1) are fixedly installed with transparent observation windows (31). The bottom of the box (1) is fixedly installed with a control box (32), and the inner wall of the control box (32) is fixedly installed with a control panel (33). The outer wall of the sub-turntable (18) is fixedly installed with a handle (34).

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