A 3D joystick for drone manipulator

Abstract

The present invention relates to the technical field of control devices, and specifically to a 3D rocker for an unmanned aerial vehicle manipulator, comprising a handle, a mounting seat, a first reset component, a second reset component, a rocker, a first positioning component, and a second positioning component. The mounting seat is cylindrical in shape as a whole, and a limiting plate is slidably arranged on the main surface of the first reset component away from the second reset component. A fixing groove that matches the rocker rod portion is provided on the limiting plate. The first positioning component is slidably arranged on the first reset component, and the first positioning component is on the moving path of the limiting plate. The first positioning component is used to fix the position with the second reset component, and the second positioning component is slidably arranged on the second reset component, and the second positioning component contacts the first positioning component, and the second positioning component is used to fix the position with the mounting seat. The present invention realizes the function of quickly and conveniently completing the fixing work of the rocker in four directions by sliding the limiting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of control devices, and in particular to a 3D joystick for an unmanned aerial vehicle manipulator. Background Art

[0002] In recent years, as the design of aerial photography aircraft has become lighter, easier to operate, and the price has been falling, small drones have appeared in everything from news photography to commercial outdoor photography, and consumer drones have gradually become a new "toy" for many photography enthusiasts. In the field of model aircraft, joystick control devices are quite common, especially 3D joystick devices. The operator outputs the corresponding signal by tilting the joystick. The 3D joystick devices currently used generally include a joystick, a rocker arm, a variable resistor assembly, and a reset mechanism. During long-term use or improper storage, if the joystick is pushed in one direction for a long time, the spring in the reset mechanism will be in a continuous stretching state. Over time, the elastic force of the reset spring will be weakened, resulting in insufficient and rapid reset.

[0003] Chinese patent application CN114326919A discloses a 3D joystick for a drone manipulator. Through the cooperation of a sliding directional locking assembly and a locating pin, the joystick is directional locked and reset locked to achieve limited fixing, so that the operator does not need to push the joystick for a long time when directional locking is performed. When resetting the lock, the joystick will not rotate arbitrarily or tilt toward one side for a long time due to external force, resulting in a reduction in the service life of one key position. However, this solution allows the entire joystick to move in four directions by removing the locating pin during use. If the locating pin is forgotten to be inserted or lost after use, the joystick cannot be fixed at this time. Summary of the invention

[0004] In view of the above problems, a 3D joystick for a drone manipulator is provided, in which a limit plate and a first positioning component cooperate to fix the position of the joystick, a first reset component and a second reset component, and a second positioning component fixes the position of the second reset component and a mounting base.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] A 3D joystick for an unmanned aerial vehicle manipulator is provided, comprising a handle, a mounting seat, a first reset component, a second reset component and a joystick, and also comprising a first positioning component and a second positioning component. The mounting seat is cylindrical as a whole, and the first reset component can be movably arranged above the second reset component. A limit plate is slidably arranged on the main surface of the first reset component away from the second reset component, and a fixing groove that matches the joystick rod portion is provided on the limit plate. The sliding direction of the limit plate is parallel to the diameter direction of the mounting seat. The first positioning component is slidably arranged on the first reset component, and the sliding direction of the first positioning component is parallel to the axis of the mounting seat. The first positioning component is on the moving path of the limit plate. The first positioning component is used to fix the position with the second reset component, and the second positioning component is slidably arranged on the second reset component, and the sliding direction of the second positioning component is parallel to the axis of the mounting seat. The second positioning component contacts the first positioning component, and the second positioning component is used to fix the position with the mounting seat.

[0007] Preferably, the first reset assembly includes a first circular mounting plate and a fixing bolt, the axis of the first circular mounting plate is parallel to the axis of the mounting seat, a first through hole is provided on the first circular mounting plate to cooperate with the sliding of the first positioning assembly, a first limiting slide groove is provided on the first circular mounting plate, the length direction of the first limiting slide groove is parallel to the diameter direction of the first circular mounting plate, a first limiting protrusion is fixedly provided on the limiting plate to cooperate with the sliding of the first limiting slide groove, the fixing bolt is fixedly connected to the first limiting protrusion, and the fixing bolt is slidably provided in the first limiting slide groove.

[0008] Preferably, a limit strip is fixedly provided on the first circular mounting plate, and the first reset assembly further comprises an electromagnet, which is fixedly provided on a surface of the limit strip close to the axis of the first circular mounting plate, the electromagnet is electrically connected to the handle, the limit plate is slidably provided between the axis of the first circular mounting plate and the limit strip, and a magnetic strip which cooperates with the electromagnet is fixedly provided on the limit plate.

[0009] Preferably, the first reset assembly also includes a first spring, which is fixedly disposed in the first limiting slot, wherein the axis of the first spring is parallel to the length direction of the first limiting slot, and the first spring is fixedly connected to one end of the first limiting protrusion close to the limiting strip.

[0010] Preferably, a plurality of anti-slip strips are fixedly arranged on the limiting plate, and all the anti-slip strips are evenly arranged along the sliding direction of the limiting plate.

[0011] Preferably, the fixing groove is in a "U" shape as a whole, and the opening of the fixing groove is arranged in a direction away from the limiting strip.

[0012] Preferably, the first through hole is a stepped hole, and the smaller end between the first through holes is arranged in a direction away from the handle, the first positioning assembly includes a fixed sleeve, a positioning shaft and a second spring, the fixed sleeve is fixedly arranged in the first through hole, the fixed sleeve is coaxially arranged with the first through hole, a second limiting slide groove is provided on the inside of the fixed sleeve, the length direction of the second limiting slide groove is parallel to the axis of the fixed sleeve, the positioning shaft and the fixed sleeve are coaxially slidably connected, a second limiting protrusion which slidably cooperates with the second limiting slide groove is fixedly provided on the side wall of the positioning shaft, the second limiting protrusion is not provided at both ends of the positioning shaft, the second spring is fixedly arranged in the second limiting slide groove, the axis of the second spring is parallel to the length direction of the second limiting slide groove, the second spring is fixedly connected to one end of the second limiting protrusion away from the limiting plate, and the limiting plate is provided with an inclined surface which cooperates with the sliding of the positioning shaft.

[0013] Preferably, the number of the second limiting protrusions is two, and the two limiting protrusions are evenly arranged around the axis of the positioning shaft.

[0014] Preferably, an outer wall of the fixing sleeve is provided with an external thread, and the first through hole is provided with an internal thread matching the fixing sleeve.

[0015] Preferably, the second positioning component has the same structure as the first positioning component, a second limiting protrusion is fixedly provided at the end of the positioning shaft in the second positioning component close to the first reset component, a second through hole is provided on the second reset component to cooperate with the second positioning component, the second through hole has the same structure as the first through hole and is coaxially arranged, and a third through hole is provided on the mounting seat to cooperate with the positioning shaft, and the third through hole is coaxially arranged with the second through hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes the function of fixing the position of the rocker, the first reset component and the second reset component through the limit plate and the first positioning component, and realizes the function of fixing the position of the second reset component and the mounting seat through the second positioning component, so that the fixing work of the rocker in four directions can be quickly and conveniently completed by sliding the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a 3D joystick of a drone controller;

[0019] Figure 2 It is a three-dimensional schematic diagram of the use status of the mounting seat in the 3D joystick of the drone manipulator;

[0020] Figure 3 It is a three-dimensional schematic diagram of the closed state of the mounting seat in the 3D joystick of the drone manipulator;

[0021] Figure 4It is a three-dimensional exploded schematic diagram of a mounting seat in a 3D joystick of a drone controller;

[0022] Figure 5 It is a three-dimensional schematic diagram of a first reset component in a 3D joystick of a drone manipulator;

[0023] Figure 6 It is a three-dimensional exploded schematic diagram of the first reset component in the 3D joystick of the UAV manipulator;

[0024] Figure 7 It is a three-dimensional schematic diagram of a first positioning component in a 3D joystick of a drone manipulator;

[0025] Figure 8 It is a three-dimensional exploded schematic diagram of the first positioning component in the 3D joystick of the drone manipulator;

[0026] Fig. 9 It is a three-dimensional schematic diagram of a second reset component in a 3D joystick of a drone manipulator;

[0027] Fig.10 The present invention is a three-dimensional exploded schematic diagram of a second reset component in a 3D joystick of a UAV manipulator.

[0028] The numbers in the figure are:

[0029] 1-Handle;

[0030] 2-Mounting seat;

[0031] 21- a third through hole;

[0032] 3-first reset component;

[0033] 31-limiting plate; 311-fixing groove; 312-first limiting protrusion; 313-magnetic strip; 314-anti-slip strip;

[0034] 32-first circular mounting plate; 321-first through hole; 322-first limiting slide groove; 323-limiting strip;

[0035] 33-fixing bolt;

[0036] 34-electromagnet;

[0037] 35- first spring;

[0038] 4- second reset component;

[0039] 41- second through hole;

[0040] 5- Joystick;

[0041] 6-first positioning component;

[0042] 61-fixed sleeve; 611-second limiting slide groove;

[0043] 62-positioning shaft; 621-second limiting protrusion;

[0044] 63- second spring;

[0045] 7- Second positioning component. DETAILED DESCRIPTION

[0046] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] See also Figures 1 to 10 As shown, a 3D rocker of an unmanned aerial vehicle manipulator includes a handle 1, a mounting seat 2, a first reset component 3, a second reset component 4 and a rocker 5, and also includes a first positioning component 6 and a second positioning component 7. The mounting seat 2 is cylindrical as a whole, and the first reset component 3 can be movably arranged above the second reset component 4. A limit plate 31 is slidably arranged on the main surface of the first reset component 3 away from the second reset component 4, and a fixing groove 311 that matches the rod part of the rocker 5 is opened on the limit plate 31. The sliding direction of the limit plate 31 is parallel to the diameter direction of the mounting seat 2. The first positioning component 6 is slidably arranged on the first reset component 3, and the sliding direction of the first positioning component 6 is parallel to the axis of the mounting seat 2. The first positioning component 6 is on the moving path of the limit plate 31. The first positioning component 6 is used to fix the position with the second reset component 4, and the second positioning component 7 is slidably arranged on the second reset component 4. The sliding direction of the second positioning component 7 is parallel to the axis of the mounting seat 2, and the second positioning component 7 contacts the first positioning component 6. The second positioning component 7 is used to fix the position with the mounting seat 2.

[0048] When the staff member has finished using the rocker 5, he stops operating the rocker 5 and pushes the limit plate 31 to move in the direction close to the rocker 5. The limit plate 31 approaches the rocker 5 along the diameter direction of the mounting seat 2. The limit plate 31 will contact the first positioning component 6 during the movement. The first positioning component 6 will move after contacting the limit plate 31. The first positioning component 6 moves downward along the axial direction of the mounting seat 2 to complete the position fixation with the second drive reset component. The second positioning component 7 in contact with the first positioning component 6 also moves, and the second positioning component 7 also moves downward along the axial direction of the mounting seat 2 to complete the position fixation with the mounting seat 2. When the limit plate 31 moves to the maximum The groove of the limit plate 31 clamps the rod of the rocker 5 to complete the position fixation. At this time, the mounting seat 2, the first drive reset assembly, the second drive reset assembly and the rocker 5 are fixed. When the control limit plate 31 is moved away from the rocker 5, the first positioning assembly 6 and the second positioning assembly 7 will release the corresponding position fixation. Compared with the prior art, the limit plate 31 and the first positioning assembly 6 of the present application cooperate to complete the position fixation between the rocker 5, the first reset assembly 3 and the second reset assembly 4, and the second positioning assembly 7 completes the position fixation between the second reset assembly 4 and the mounting seat 2, so that the fixing work of the rocker 5 in four directions can be quickly and conveniently completed by sliding the limit plate 31.

[0049] See also Figures 4 to 6 As shown: the first reset component 3 includes a first circular mounting plate 32 and a fixing bolt 33, the axis of the first circular mounting plate 32 is parallel to the axis of the mounting seat 2, the first circular mounting plate 32 is provided with a first through hole 321 that cooperates with the sliding of the first positioning component 6, the first circular mounting plate 32 is provided with a first limiting slide groove 322, the length direction of the first limiting slide groove 322 is parallel to the diameter direction of the first circular mounting plate 32, the limiting plate 31 is fixedly provided with a first limiting protrusion 312 that cooperates with the sliding of the first limiting slide groove 322, the fixing bolt 33 is fixedly connected to the first limiting protrusion 312, and the fixing bolt 33 is slidably set in the first limiting slide groove 322.

[0050] The limit plate 31 is pushed to move. During the movement of the limit plate 31, due to the existence of the fixing bolt 33, the first limit protrusion 312 is always clamped in the first limit slot 322. Since the first limit protrusion 312 and the first limit slot 322 always keep in contact, the limit plate 31 can only maintain one state for movement. Compared with the prior art, the first limit protrusion 312, the first limit slot 322 and the fixing bolt 33 of the present application limit the moving state of the limit plate 31, thereby ensuring that the limit plate 31 does not rotate or other movements when it moves.

[0051] See also Figures 4 to 6As shown: a limit strip 323 is fixedly arranged on the first circular mounting plate 32, the first reset assembly 3 also includes an electromagnet 34, the electromagnet 34 is fixedly arranged on a surface of the limit strip 323 close to the axis of the first circular mounting plate 32, the electromagnet 34 is electrically connected to the handle 1, the limit plate 31 is slidably arranged between the axis of the first circular mounting plate 32 and the limit strip 323, and a magnetic strip 313 that cooperates with the electromagnet 34 is fixedly arranged on the limit plate 31.

[0052] When the handle 1 is used, the power is turned on, and the limit plate 31 is pushed to move in the direction away from the rocker 5. When the limit plate 31 moves to the maximum distance, the magnetic strip 313 and the energized electromagnet 34 attract each other through magnetic force, thereby fixing the position of the limit plate 31. When the handle 1 is used up, the power is turned off. At this time, the electromagnet 34 is not energized and cannot generate magnetic force. At this time, the limit plate 31 can be pushed to move in the direction close to the rocker 5. Compared with the prior art, the limit strip 323, electromagnet 34 and magnetic strip 313 of the present application cooperate to ensure that the position of the limit plate 31 will not change arbitrarily when the rocker 5 is used, thereby avoiding the limit plate 31 from getting close to the rocker 5 to prevent the rocker 5 from swinging when the rocker 5 is used.

[0053] See also Figures 4 to 6 As shown: the first reset component 3 also includes a first spring 35, the first spring 35 is fixedly arranged in the first limiting slide groove 322, the axis of the first spring 35 is parallel to the length direction of the first limiting slide groove 322, and the first spring 35 is fixedly connected to one end of the first limiting protrusion 312 close to the limiting strip 323.

[0054] When the handle 1 is used, the power is turned on. At this time, the electromagnet 34 is energized and can cooperate with the magnetic strip 313 to magnetically force the limit plate 31, thereby pushing the limit plate 31 to move away from the rocker 5, and the first spring 35 is continuously compressed. When the limit plate 31 moves to the maximum distance, the position of the limit plate 31 is fixed, and the first spring 35 is in a compressed state. The power of the handle 1 is turned off. At this time, the electromagnet 34 no longer generates magnetic force, and the first spring 35 is released from the compressed state to provide thrust, and the limit plate 31 automatically moves in the direction close to the rocker 5. Compared with the prior art, the first spring 35 of the present application makes it possible for the limit plate 31 to automatically fix the position of the rocker 5 when the power is turned off when the handle 1 is not in use, so that the staff does not need to turn off the power of the handle 1 and then slide the limit plate 31 again to fix the position of the rocker 5.

[0055] See also Figures 5 and 6 As shown, a plurality of anti-slip strips 314 are fixedly arranged on the limiting plate 31 , and all the anti-slip strips 314 are evenly arranged along the sliding direction of the limiting plate 31 .

[0056] When the handle 1 is used, the power supply is started. At this time, the electromagnet 34 is energized to cooperate with the magnetic strip 313. Then the staff presses his finger on the anti-slip strip 314 to push the limit plate 31 to move. Compared with the prior art, the anti-slip strip 314 of the present application makes the friction between the staff's finger and the limit plate 31 greater, thereby avoiding relative sliding between the limit plate 31 and the staff's finger due to the elastic force generated when the first spring 35 is compressed.

[0057] See also Figures 5 and 6 As shown, the fixing groove 311 is in a “U” shape as a whole, and the opening of the fixing groove 311 is arranged in a direction away from the limiting strip 323 .

[0058] When the handle 1 is used up and the power is turned off, the electromagnet 34 is not energized and cannot generate magnetic force. The first spring 35 is released from the compressed state to provide thrust, and the limit plate 31 automatically moves toward the direction close to the rocker 5. The two ends of the fixing groove 311 first contact the rod body of the rocker 5 to move it to the center of the mounting base 2. Compared with the prior art, the fixing groove 311 of the present application makes the rocker 5 be located at the center of the mounting base 2 when fixed, thereby avoiding the situation that the elasticity of the mounting base 2 cannot make the rocker 5 rebound to the center to be fixed.

[0059] See also Figures 6 to 8 As shown in the figure, the first through hole 321 is a stepped hole, and the smaller end of the first through hole 321 is arranged in a direction away from the handle 1. The first positioning assembly 6 includes a fixed sleeve 61, a positioning shaft 62 and a second spring 63. The fixed sleeve 61 is fixedly arranged in the first through hole 321. The fixed sleeve 61 is coaxially arranged with the first through hole 321. A second limiting groove 611 is provided inside the fixed sleeve 61. The length direction of the second limiting groove 611 is parallel to the axis of the fixed sleeve 61. The positioning shaft 62 is parallel to the fixed sleeve 61. The second limiting protrusion 621 is fixedly provided on the side wall of the positioning shaft 62 and is slidably matched with the second limiting groove 611. The second limiting protrusion 621 is not provided at both ends of the positioning shaft 62. The second spring 63 is fixedly provided in the second limiting groove 611. The axis of the second spring 63 is parallel to the length direction of the second limiting groove 611. The second spring 63 is fixedly connected to one end of the second limiting protrusion 621 away from the limiting plate 31. The limiting plate 31 is provided with an inclined surface that matches the sliding of the positioning shaft 62.

[0060] When the handle 1 is in use, the limit plate 31 is away from the rocker 5. At this time, the positioning shaft 62 protrudes from the first circular mounting plate 32 on the work of the second spring 63. When the handle 1 is used, the power is turned off. At this time, the electromagnet 34 is not energized and cannot generate magnetic force. The first spring 35 is released from the compressed state to provide thrust, and the limit plate 31 automatically moves in the direction close to the rocker 5. The inclined surface of the limit plate 31 first contacts the positioning shaft 62, and the positioning shaft 62 moves vertically with the horizontal movement of the limit plate 31. The second spring 63 is compressed, and the positioning shaft 62 moves to the second reset assembly 4 to complete the position fixation. When the power of the handle 1 is started and the limit plate 31 is away from the rocker 5, the second spring 63 is released from the compressed state to push the positioning shaft 62 up in the vertical direction. At this time, the positioning shaft 62 is released from the position fixation with the second reset assembly 4. Compared with the prior art, the fixed sleeve 61, the positioning shaft 62 and the second spring 63 of the present application enable the first positioning assembly 6 to follow it to work when the limit plate 31 moves, thereby reducing the use burden of the staff.

[0061] See also Figures 7 and 8 As shown, the number of the second limiting protrusions 621 is two, and the two limiting protrusions are evenly arranged around the axis of the positioning shaft 62 .

[0062] When the positioning shaft 62 contacts the limiting plate 31, the two second limiting protrusions 621 will always contact the second limiting groove 611, and the force applied to the end of the positioning shaft 62 can be evenly dispersed to the side wall of the positioning shaft 62. Compared with the prior art, the second limiting protrusions 621 of the present application limit the number and position so that the positioning shaft 62 is evenly stressed, thereby improving the service life of the first positioning assembly 6.

[0063] See also Figures 6 to 8 As shown, an outer wall of the fixing sleeve 61 is provided with an external thread, and the first through hole 321 is provided with an internal thread matching the fixing sleeve 61 .

[0064] The fixing sleeve 61 is coaxially aligned with the first through hole 321, and then the fixing sleeve 61 is rotated so that the fixing sleeve 61 and the first through hole 321 are fixed. Compared with the prior art, the fixing sleeve 61 and the first through hole 321 of the present application are threadedly connected to make installation and disassembly more convenient, so that the staff can quickly replace parts.

[0065] See also Figures 4 to 10 As shown: the second positioning component 7 has the same structure as the first positioning component 6, the positioning shaft 62 in the second positioning component 7 is fixedly provided with a second limiting protrusion 621 at the end close to the first reset component 3, the second reset component 4 is provided with a second through hole 41 cooperating with the second positioning component 7, the second through hole 41 has the same structure as the first through hole 321 and is coaxially arranged, and the mounting seat 2 is provided with a third through hole 21 cooperating with the positioning shaft 62, and the third through hole 21 is coaxially arranged with the second through hole 41.

[0066] When the limit plate 31 is away from the rocker 5, the highest point of the positioning shaft 62 in the second positioning assembly 7 is parallel to the bottom surface of the first circular mounting plate 32. Compared with the prior art, the positioning shaft 62 in the second positioning assembly 7 of the present application cannot fix the position of the first reset assembly 3 and the second reset assembly 4, thereby avoiding the first reset assembly 3 and the second reset assembly 4 from being unable to move relative to each other when the limit plate 31 is away from the rocker 5.

[0067] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A 3D rocker for an unmanned aerial vehicle manipulator, comprising a handle (1), a mounting seat (2), a first reset component (3), a second reset component (4) and a rocker (5), characterized in that: It also includes a first positioning component (6) and a second positioning component (7); The mounting seat (2) is cylindrical in shape as a whole, the first reset assembly (3) is movably arranged above the second reset assembly (4), a limit plate (31) is slidably arranged on a main surface of the first reset assembly (3) away from the second reset assembly (4), a fixing groove (311) is provided on the limit plate (31) which matches the rod portion of the rocker (5), and the sliding direction of the limit plate (31) is parallel to the diameter direction of the mounting seat (2); The first positioning component (6) is slidably arranged on the first resetting component (3); the sliding direction of the first positioning component (6) is parallel to the axis of the mounting seat (2); the first positioning component (6) is located on the moving path of the limiting plate (31); and the first positioning component (6) is used to fix the position with the second resetting component (4); The second positioning component (7) is slidably arranged on the second resetting component (4), the sliding direction of the second positioning component (7) is parallel to the axis of the mounting seat (2), the second positioning component (7) is in contact with the first positioning component (6), and the second positioning component (7) is used to fix the position with the mounting seat (2); The first reset assembly (3) comprises a first circular mounting plate (32) and a fixing bolt (33); The axis of the first circular mounting plate (32) is parallel to the axis of the mounting seat (2); a first through hole (321) is provided on the first circular mounting plate (32) for sliding with the first positioning assembly (6); a first limiting slide groove (322) is provided on the first circular mounting plate (32); the length direction of the first limiting slide groove (322) is parallel to the diameter direction of the first circular mounting plate (32); a first limiting protrusion (312) is fixedly provided on the limiting plate (31) for sliding with the first limiting slide groove (322); a fixing bolt (33) is fixedly connected to the first limiting protrusion (312); and the fixing bolt (33) is slidably provided in the first limiting slide groove (322); A limit strip (323) is fixedly arranged on the first circular mounting plate (32), and the first reset assembly (3) further comprises an electromagnet (34); The electromagnet (34) is fixedly arranged on a surface of the limit strip (323) close to the axis of the first circular mounting plate (32), the electromagnet (34) is electrically connected to the handle (1), the limit plate (31) is slidably arranged between the axis of the first circular mounting plate (32) and the limit strip (323), and a magnetic strip (313) cooperating with the electromagnet (34) is fixedly arranged on the limit plate (31); The first reset assembly (3) further comprises a first spring (35); The first spring (35) is fixedly arranged in the first limiting sliding groove (322), the axis of the first spring (35) is parallel to the length direction of the first limiting sliding groove (322), and the first spring (35) is fixedly connected to one end of the first limiting protrusion (312) close to the limiting strip (323); A plurality of anti-slip strips (314) are fixedly arranged on the limiting plate (31), and all the anti-slip strips (314) are evenly arranged along the sliding direction of the limiting plate (31); The fixing groove (311) is in a "U" shape as a whole, and the opening of the fixing groove (311) is arranged in a direction away from the limiting strip (323); The first through hole (321) is a stepped hole, and the smaller end of the first through hole (321) is arranged in a direction away from the handle (1). The first positioning assembly (6) comprises a fixing sleeve (61), a positioning shaft (62) and a second spring (63); The fixed sleeve (61) is fixedly arranged in the first through hole (321), the fixed sleeve (61) and the first through hole (321) are coaxially arranged, a second limiting sliding groove (611) is provided inside the fixed sleeve (61), the length direction of the second limiting sliding groove (611) is parallel to the axis of the fixed sleeve (61), the positioning shaft (62) is coaxially slidably connected with the fixed sleeve (61), and a sliding member that is slidably matched with the second limiting sliding groove (611) is fixedly arranged on the side wall of the positioning shaft (62). The second limiting protrusion (621) is not arranged at the two ends of the positioning shaft (62), the second spring (63) is fixedly arranged in the second limiting sliding groove (611), the axis of the second spring (63) is parallel to the length direction of the second limiting sliding groove (611), the second spring (63) is fixedly connected to the end of the second limiting protrusion (621) away from the limiting plate (31), and the limiting plate (31) is provided with an inclined surface that cooperates with the sliding of the positioning shaft (62); The number of the second limiting protrusions (621) is two, and the two limiting protrusions are evenly arranged around the axis of the positioning shaft (62); An external thread is provided on the outer wall of the fixing sleeve (61), and an internal thread matching the fixing sleeve (61) is provided on the first through hole (321); The second positioning assembly (7) has the same structure as the first positioning assembly (6); a second limiting protrusion (621) is fixedly provided at the end of the positioning shaft (62) in the second positioning assembly (7) close to the first reset assembly (3); a second through hole (41) cooperating with the second positioning assembly (7) is provided on the second reset assembly (4); the second through hole (41) has the same structure as the first through hole (321) and is coaxially arranged; a third through hole (21) cooperating with the positioning shaft (62) is provided on the mounting seat (2); the third through hole (21) is coaxially arranged with the second through hole (41).

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