Safety protection mobile antenna test rotary table with self-locking function

Abstract

The invention belongs to the technical field of antenna test rotary tables, and discloses a safety protection type mobile antenna test rotary table with a self-locking function, which comprises a main body component, a support component, an abutting component and a locking component, the control assembly is propped against the propping assembly; by treading the control assembly, the abutting assembly slides upwards, the abutting supporting assembly slides towards the two sides, limitation with the body assembly is relieved, meanwhile, the conversion assembly converts the sliding acting force into the rotating acting force, the rotating acting force is transmitted to the locking assembly, and locking with the body assembly is relieved; at the moment, the emitting surface of the device can realize the purpose of omnibearing rotation; after adjustment is finished, the control assembly is stopped from being treaded, the locking assembly and the supporting assembly will reset at the moment, the body assembly is locked again, and therefore the emitting face of the device will not deviate when the device encounters crosswind.

Description

Technical Field

[0001] The invention belongs to the technical field of antenna test turntables, in particular to a safety protective mobile antenna test turntable with a self-locking function. Background Art

[0002] The antenna test turntable is one of the main equipment used to test the antenna's pointing, gain, beam width, sidelobe level and other performance parameters. The antenna test turntable is widely used in industry and military. The antenna test turntable can enable the antenna to rotate horizontally and pitch vertically, making it easier for the antenna to cover a large range of airspace, so that the antenna's scanning function can cover the entire airspace.

[0003] However, most mobile antenna test turntables are used outdoors, which causes the antenna transmitting surface to shift easily when encountering strong lateral winds, thus affecting the test results. Summary of the invention

[0004] In order to solve the problem that when a safety protective mobile antenna test turntable with a self-locking function is encountered in the above background technology and the antenna transmitting surface is easily shifted, thereby affecting the detection results, the present invention provides a safety protective mobile antenna test turntable with a self-locking function.

[0005] To achieve the above object, the present invention provides the following technical solution: comprising:

[0006] The main body component includes a body component, a support component arranged on the body component, an interference component slidably connected in the body component, and a control component that interferes with the interference component;

[0007] The rotating component comprises a conversion component rotatably connected in the body component, and a locking component movably connected in the conversion component.

[0008] Preferably, the body assembly includes a base and a rotating rod rotatably connected to the base.

[0009] Preferably, the support assembly includes a support rod fixedly connected to the end of the rotating rod, a support plate arranged outside the support rod, an inner tooth groove opened on the support plate, a rotating block fixedly connected to the end of the support rod at the position of the inner tooth groove on the support plate, a limiting member slidably connected to the rotating block, and a driving member rotatably connected inside the limiting member.

[0010] Preferably, a sliding groove is provided on the rotating block;

[0011] The limiting member includes a limiting rod slidably connected in the sliding groove, a notch opened at the end of the limiting rod, a support rod rotatably connected in the notch, a protrusion fixedly connected to the outside of the support rod, and a coil spring sleeved outside the support rod.

[0012] Preferably, the bottom end of the limiting rod is provided with an inclined groove, and the position of the supporting rod corresponding to the sliding groove is provided with a sliding groove connected thereto;

[0013] The driving member comprises a movable rod movably connected in the inclined slot, a connecting rod fixedly connected outside the movable rod, and an output rod fixedly connected to the end of the connecting rod;

[0014] Wherein, the output rod is slidably connected in the sliding groove.

[0015] Preferably, the rotating rod is provided with a through-interference groove, the support rod is provided with a cavity, and the support rod is provided with a limiting groove communicating with the interference groove at a position corresponding to the interference groove;

[0016] The interference assembly includes a wedge plate slidably connected to the interference groove, an interference rod that interferes with the wedge plate, a limit rod fixedly connected to the end of the interference rod, and an elastic member sleeved outside the limit rod and located between the end of the interference rod and the inner wall of the cavity;

[0017] Wherein, the limiting rod is slidably connected to the supporting rod, the resisting rod is arranged in the cavity, and the wedge plate is slidably connected to the limiting groove.

[0018] Preferably, the control assembly includes a support fixedly connected to the bottom end of the base, a pedal rotatably connected to the support, and a coil spring 2 sleeved on the end of the shaft on the support.

[0019] Preferably, a circular groove is provided inside the rotating rod;

[0020] The conversion assembly comprises a conversion cylinder rotatably connected in the circular groove, a spiral groove opened on the inner wall of the conversion cylinder, a shifting rod movably connected in the spiral groove, and a receiving member fixedly connected to the end of the conversion cylinder.

[0021] Preferably, a rotation groove is provided at the top of the base;

[0022] The receiving member comprises an arc-shaped groove which is rotatably connected to the rotating disk and is provided on the rotating disk.

[0023] Preferably, the base is provided with a guide groove in the rotating groove, and the rotating rod is provided with a locking groove outside;

[0024] The locking assembly includes a slider slidably connected to the guide groove, and an L-shaped rod fixedly connected to the end of the slider;

[0025] Wherein, the end of the L-shaped rod matches the locking groove, and the L-shaped rod is movably connected in the arc groove.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: first, the body component is pushed to move the device to a specified position, and then the control component is stepped on, so that the resistance component will slide upward into the body component, and at the same time, the resistance support component will slide to both sides. At this time, the support component will release the restriction between the body component, and then the device launch surface can be adjusted to rotate up and down;

[0027] During the upward movement of the resistance component, the conversion component will convert the sliding force into a rotational force, and transmit it to the locking component to release the lock between the main body component. At this time, the launch surface of the device can be adjusted to turn left and right. When the adjustment is completed, stop stepping on the control component. At this time, the locking component and the support component will be reset, and the main body component will be locked again. In this way, the launch surface of the device will not be offset when encountering crosswinds. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 A top view of the base structure of the safety protective mobile antenna test turntable with a self-locking function of the present invention;

[0030] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a rotating rod in a safety protective mobile antenna test turntable with a self-locking function of the present invention;

[0031] Figure 4 It is a schematic diagram of the cross-sectional structure of the support rod in the safety protective mobile antenna test turntable with self-locking function of the present invention;

[0032] Figure 5 It is a schematic diagram of the support plate structure in the safety protective mobile antenna test turntable with self-locking function of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the interference component in the safety protective mobile antenna test turntable with self-locking function of the present invention;

[0034] Figure 7 for Figure 6 A partial enlarged view of part A;

[0035] Figure 8 It is a schematic diagram of the cross-sectional structure of the base in the safety protective mobile antenna test turntable with self-locking function of the present invention;

[0036] Fig. 9The present invention is a schematic diagram of the structure of the rotating parts in the safety protective mobile antenna test turntable with self-locking function.

[0037] In the figure: 100, main body; 101, body assembly; 101a, base; 101b, rotating groove; 101c, guide groove; 101d, rotating rod; 101e, contact groove; 101f, round groove; 101g, locking groove; 102, support assembly; 102a, support rod; 102b, sliding groove; 102c, cavity; 102d, limiting groove; 102e, support plate; 102f, inner tooth groove; 102g, rotating block; 102h, sliding groove; 102i, limiting member; 102j, driving member; 102i-1, limiting rod; 102i-2, notch; 102i-3, inclined groove; 102i-4, support rod; 102i-5, protrusion; 102i-6, coil spring one; 102j-1, movable rod; 102j-2, connecting rod; 102j-3, output rod; 103, interference assembly; 103a, wedge plate; 103b, interference rod; 103c, limit rod; 103d, elastic member; 104, control assembly; 104a, support; 104b, pedal; 104c, coil spring two; 200, rotating part; 201, conversion assembly; 201a, conversion cylinder; 201b, spiral groove; 201c, lever; 201d, receiving member; 201d-1, rotating disk; 201d-2, arc groove; 202, locking assembly; 202a, slider; 202b, L-shaped plug rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1, reference Figure 1 to Figure 6As shown, it is the first embodiment of the present invention, which provides a safety protective mobile antenna test turntable with a self-locking function, including a main body component 100, including a body component 101, a support component 102 arranged on the body component 101, a conflict component 103 slidably connected in the body component 101, and a control component 104 conflicting with the conflict component 103; a rotating component 200, including a conversion component 201 rotatably connected in the body component 101, and a locking component 202 movably connected in the conversion component 201, firstly pushing the body component 101 to move the device to a specified position, and then stepping on the control component 104, so that the conflict component 103 will slide upward into the body component 101, and at the same time will conflict with the support component 102 to slide to both sides, at this time the support component 102 will release the restriction between the body component 101, and then the device can be adjusted to rotate in the up and down direction of the transmitting surface;

[0040] During the upward movement of the resistance component 103, the conversion component 201 will convert the sliding force into a rotational force and transmit it to the locking component 202 to release the lock between the main component 101, so that the launch surface of the device can be adjusted to rotate left and right.

[0041] When the adjustment is completed, stop stepping on the control component 104, and the locking component 202 and the supporting component 102 will be reset, and the main body component 101 will be locked again, so that the emitting surface of the device will not be offset when encountering crosswind.

[0042] Example 2, reference Figures 1 to 8 , which is the second embodiment of the present invention. Different from the previous embodiment, the main body component 101 includes a base 101a, and a rotating rod 101d rotatably connected to the base 101a, a plurality of universal wheels are installed below the base 101a, and the end of the base 101a is rotatably connected to the rotating rod 101d.

[0043] Furthermore, the support assembly 102 includes a support rod 102a fixedly connected to the end of the rotating rod 101d, a support plate 102e arranged outside the support rod 102a, an inner tooth groove 102f opened on the support plate 102e, a rotating block 102g fixedly connected to the end of the support rod 102a and located at the position of the inner tooth groove 102f on the support plate 102e, a limiting member 102i slidably connected to the rotating block 102g, and a driving member 102i rotatably connected to the limiting member 102i. 2j, the end of the rotating rod 101d is fixedly connected to the support rod 102a, the end of the emitting surface of the device is fixedly connected to the support plate 102e, the support plate 102e is located outside the support rod 102a and is provided with an internal tooth groove 102f, a rotating block 102g is provided in the internal tooth groove 102f, the rotating block 102g is fixedly connected to the support rod 102a, a plurality of limiting members 102i are slidably connected to the rotating block 102g, and a driving member 102j is rotatably connected inside the limiting member 102i.

[0044] Furthermore, a slide groove 102h is provided on the rotating block 102g; the limiting member 102i includes a limiting rod 102i-1 slidably connected in the slide groove 102h, a notch 102i-2 provided at the end of the limiting rod 102i-1, a support rod 102i-4 rotatably connected in the notch 102i-2, a protrusion 102i-5 fixedly connected to the outside of the support rod 102i-4, and a coil spring 102i-6 sleeved on the outside of the support rod 102i-4. A plurality of slide grooves 102h are provided on the rotating block 102g. , a plurality of slide grooves 102h are all slidably connected with limiting rods 102i-1, and notches 102i-2 are opened at the ends of the limiting rods 102i-1. A support rod 102i-4 is rotatably connected in the notch 102i-2, and a protrusion 102i-5 is fixedly connected outside the support rod 102i-4. A coil spring 102i-6 is sleeved on the end of the support rod 102i-4. When the limiting rod 102i-1 does not slide along the slide groove 102h to the inside of the rotating block 102g, the limiting block and the inner tooth groove 102f restrain each other.

[0045] Furthermore, the bottom end of the limiting rod 102i-1 is provided with an inclined groove 102i-3, and the position of the supporting rod 102a corresponding to the sliding groove 102h is provided with a sliding groove 102b connected thereto; the driving member 102j includes a movable rod 102j-1 movably connected in the inclined groove 102i-3, a connecting rod 102j-2 fixedly connected to the outside of the movable rod 102j-1, and an output rod 102j-3 fixedly connected to the end of the connecting rod 102j-2; wherein the output rod 102j-3 It is slidably connected in the sliding groove 102b, and an inclined groove 102i-3 is opened at the bottom end of the limiting rod 102i-1, and a movable rod 102j-1 is movably connected in the inclined groove 102i-3. A connecting rod 102j-2 is fixedly connected outside the movable rod 102j-1, and an output rod 102j-3 is fixedly connected to the end of the connecting rod 102j-2. A sliding groove 102b is opened at the position of the support rod 102a corresponding to the sliding groove 102h, and the output rod 102j-3 is slidably connected in the sliding groove 102b.

[0046] Furthermore, the rotating rod 101d is provided with a through-interference groove 101e, the supporting rod 102a is provided with a cavity 102c, and the supporting rod 102a is provided with a limiting groove 102d connected thereto at a position corresponding to the interference groove 101e; the interference assembly 103 comprises a wedge plate 103a slidably connected to the interference groove 101e, an interference rod 103b which interferes with the wedge plate 103a, a limiting rod 103c fixedly connected to the end of the interference rod 103b, and an elastic member 103d sleeved outside the limiting rod 103c and located between the end of the interference rod 103b and the inner wall of the cavity 102c; wherein the limiting rod 103c is slidably connected to the supporting rod 102a, and the interference rod 103b is arranged in the cavity 102c The wedge plate 103a is slidably connected with the limiting groove 102d, a cavity 102c is provided in the support rod 102a, a penetrating interference groove 101e is provided in the rotating rod 101d, and a penetrating limiting groove 102d is provided at a position corresponding to the interference groove 101e of the support rod 102a, and the limiting groove 102d is communicated with the interference groove 101e, and the wedge plate 103a is slidably connected in the interference groove 101e, and the two sides of the wedge plate 103a are in contact with the interference rod 103b, and the ends of the interference rod 103b are fixedly connected with the limiting rod 103c, the limiting rod 103c is slidably connected with the support rod 102a, and an elastic member 103d is provided between the support rod 102a and the inner wall of the cavity 102c.

[0047] Furthermore, the control component 104 includes a support 104a fixedly connected to the bottom end of the base 101a, a pedal 104b rotatably connected to the support 104a, and a coil spring 104c sleeved on the end of an axle on the support 104a. The bottom end of the base 101a is fixedly connected to the support 104a, an axle is provided between the supports 104a, a pedal 104b is rotatably connected outside the axle, and a coil spring 104c is provided outside the axle, and an end of the pedal 104b is in conflict with the wedge plate 103a.

[0048] Working principle: When the launch surface of the adjustment device needs to be adjusted to rotate longitudinally, by pressing the pedal 104b, the pedal 104b will rotate with the shaft as the center, and at the same time, the end of the pedal 104b will contact the wedge plate 103a and slide upward in the contact groove 101e. At this time, the contact rod 103b will drive the limit rod 103c to slide to both sides in the support rod 102a, and at the same time, it will squeeze the elastic member 103d. In the process of sliding of the contact rod 103b, it will also drive the output rod 102j-3 to move along the trajectory of the sliding groove 102b, and the connecting rod 102j-2 will drive the movable rod 102j-1 to slide in the inclined groove 102i-3. At this time, the limiting rod 102i-1 will slide along the trajectory of the sliding groove 102h toward the rotating block 102g. The inner tooth groove 102f of the support plate 102e will conflict with the protrusion 102i-5. Since the protrusion 102i-5 and the limiting rod 102i-1 are rotatably connected, the purpose of longitudinal rotation of the launch surface of the device can be adjusted at this time. After the adjustment is completed, stop pressing the pedal 104b, and the coil spring 104c will drive the pedal 104b to reset. At the same time, the wedge plate 103a will slide downward to a state of conflict with the pedal 104b when the elastic member 103d pushes a pair of conflicting rods 103b to reset. Then, the limiting rod 102i-1 will also extend along the trajectory of the slide groove 102h under the action of the driving member 102j, and restrain each other between the inner tooth groove 102f. In this way, when the device encounters longitudinal wind, its launch surface will not have longitudinal deviation.

[0049] Example 3, reference Figures 1 to 9, which is the third embodiment of the present invention. Different from the previous embodiment, a circular groove 101f is provided inside the rotating rod 101d; the conversion assembly 201 includes a conversion cylinder 201a rotatably connected in the circular groove 101f, a spiral groove 201b provided on the inner wall of the conversion cylinder 201a, a lever 201c movably connected in the spiral groove 201b, and a receiving member 201d fixedly connected to the end of the conversion cylinder 201a. The top of the base 101a is provided with a rotating groove 101b; the receiving member 201d includes a rotating disk 201d-1 rotatably connected, and a receiving member 201d provided at the bottom of the base 101a. The arc groove 201d-2 on the rotating disk 201d-1, the bottom end of the rotating rod 101d is provided with a penetrating circular groove 101f, the circular groove 101f is rotatably connected with the conversion cylinder 201a, the inner wall of the conversion cylinder 201a is provided with a spiral groove 201b, the spiral groove 201b is movably connected with the shift rod 201c, the end of the shift rod 201c is connected to the wedge plate 103a, the top of the base 101a is provided with a rotating groove 101b, the rotating disk 201d-1 is rotatably connected in the rotating groove 101b, and the end of the rotating disk 201d-1 is connected to the conversion cylinder 201a.

[0050] Furthermore, the base 101a is provided with a guide groove 101c in the rotating groove 101b, and a locking groove 101g is provided outside the rotating rod 101d; the locking assembly 202 includes a slider 202a slidably connected in the guide groove 101c, and an L-shaped plug rod 202b fixedly connected to the end of the slider 202a; wherein the end of the L-shaped plug rod 202b matches the locking groove 101g, and the L-shaped plug rod 202b is movably connected in the arc groove 201d-2, and the base 101a is located A guide groove 101c is provided in the rotating groove 101b, and a penetrating arc groove 201d-2 is provided at a position of the rotating disk 201d-1 corresponding to the guide groove 101c. An L-shaped plug rod 202b is movably connected in the arc groove 201d-2, and a slider 202a is fixedly connected to the end of the vertical rod of the L-shaped plug rod 202b. The slider 202a is slidably connected in the guide groove 101c. At the same time, a locking groove 101g is provided outside the rotating rod 101d at the end position of the horizontal rod of the L-shaped plug rod 202b.

[0051] Working principle: When the wedge plate 103a moves upward, the lever 201c will be driven to slide in the spiral groove 201b. At this time, the conversion cylinder 201a will rotate with itself as the center, achieving the purpose of converting the force. Then the rotating disk 201d-1 will rotate with the conversion cylinder 201a as the center. At the same time, the inner wall of the arc groove 201d-2 on the rotating disk 201d-1 will contact the L-shaped insertion rod, so that the L-shaped insertion rod 202b will drive the slider 202a to slide in the guide groove 101c, thereby causing the L-shaped insertion rod 202b to leave the locking groove. 101g, release the lock between the rotating rod 101d, and the purpose of adjusting the lateral rotation of the launching surface of the device can be achieved. After the adjustment is completed, when the wedge plate 103a is reset, it will drive the lever 201c to slide downward in the spiral groove 201b. At this time, the conversion cylinder 201a drives the rotating disk 201d-1 to reverse, and then the slider 202a will drive the L-shaped plug rod 202b along the trajectory of the guide groove 101c to embed into the locking groove 101g to limit the rotating rod 101d. In this way, when the device encounters crosswind, its launching surface will not be laterally offset.

[0052] The rest of the structure is the same as that of Example 2.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protective mobile antenna test turntable with self-locking function, characterized in that: include, The main body component (100) comprises a main body component (101), a support component (102) arranged on the main body component (101), a resistance component (103) slidably connected in the main body component (101), and a control component (104) that resists the resistance component (103); The rotating component (200) comprises a conversion component (201) rotatably connected within the body component (101), and a locking component (202) movably connected within the conversion component (201).

2. The safety protective mobile antenna test turntable with self-locking function according to claim 1 is characterized in that: The body component (101) comprises a base (101a) and a rotating rod (101d) rotatably connected to the base (101a).

3. The safety protective mobile antenna test turntable with self-locking function according to claim 2 is characterized in that: The support assembly (102) comprises a support rod (102a) fixedly connected to the end of the rotating rod (101d), a support plate (102e) arranged outside the support rod (102a), an inner tooth groove (102f) opened on the support plate (102e), a rotating block (102g) fixedly connected to the end of the support rod (102a) and located at the position of the inner tooth groove (102f) on the support plate (102e), a limiting member (102i) slidably connected to the rotating block (102g), and a driving member (102j) rotatably connected to the limiting member (102i).

4. The safety protective mobile antenna test turntable with self-locking function according to claim 3 is characterized in that: The rotating block (102g) is provided with a sliding groove (102h); The limiting member (102i) includes a limiting rod (102i-1) slidably connected in a sliding groove (102h), a notch (102i-2) opened at the end of the limiting rod (102i-1), a support rod (102i-4) rotatably connected in the notch (102i-2), a protrusion (102i-5) fixedly connected to the outside of the support rod (102i-4), and a coil spring (102i-6) sleeved outside the support rod (102i-4).

5. The safety protective mobile antenna test turntable with self-locking function according to claim 4 is characterized in that: The bottom end of the limiting rod (102i-1) is provided with an inclined groove (102i-3), and the position of the supporting rod (102a) corresponding to the sliding groove (102h) is provided with a sliding groove (102b) connected thereto; The driving member (102j) comprises a movable rod (102j-1) movably connected in the inclined groove (102i-3), a connecting rod (102j-2) fixedly connected outside the movable rod (102j-1), and an output rod (102j-3) fixedly connected to the end of the connecting rod (102j-2); Wherein, the output rod (102j-3) is slidably connected in the sliding groove (102b).

6. The safety protective mobile antenna test turntable with self-locking function according to claim 5, characterized in that: The rotating rod (101d) is provided with a penetrating interference groove (101e), a cavity (102c) is provided in the support rod (102a), and a limiting groove (102d) communicating with the interference groove (101e) is provided at a position of the support rod (102a) corresponding to the interference groove (101e); The interference assembly (103) comprises a wedge plate (103a) slidably connected in the interference groove (101e), an interference rod (103b) in conflict with the wedge plate (103a), a limit rod (103c) fixedly connected to the end of the interference rod (103b), and an elastic member (103d) sleeved outside the limit rod (103c) and located between the end of the interference rod (103b) and the inner wall of the cavity (102c); The limiting rod (103c) is slidably connected to the supporting rod (102a), the resisting rod (103b) is arranged in the cavity (102c), and the wedge plate (103a) is slidably connected to the limiting groove (102d).

7. The safety protective mobile antenna test turntable with self-locking function according to claim 6, characterized in that: The control assembly (104) comprises a support (104a) fixedly connected to the bottom end of the base (101a), a pedal (104b) rotatably connected to the support (104a), and a coil spring (104c) sleeved on the end of a shaft on the support (104a).

8. The safety protective mobile antenna test turntable with self-locking function according to claim 7, characterized in that: A circular groove (101f) is provided inside the rotating rod (101d); The conversion assembly (201) comprises a conversion cylinder (201a) rotatably connected to the circular groove (101f), a spiral groove (201b) formed on the inner wall of the conversion cylinder (201a), a lever (201c) movably connected to the spiral groove (201b), and a receiving member (201d) fixedly connected to the end of the conversion cylinder (201a).

9. The safety protective mobile antenna test turntable with self-locking function according to claim 8, characterized in that: A rotation groove (101b) is provided at the top of the base (101a); The receiving member (201d) comprises a rotating disk (201d-1) rotatably connected thereto, and an arc-shaped groove (201d-2) provided on the rotating disk (201d-1).

10. The safety protective mobile antenna test turntable with self-locking function according to claim 9, characterized in that: The base (101a) is provided with a guide groove (101c) in the rotating groove (101b), and the rotating rod (101d) is provided with a locking groove (101g) outside; The locking assembly (202) comprises a slider (202a) slidably connected in the guide groove (101c), and an L-shaped insertion rod (202b) fixedly connected to the end of the slider (202a); The end of the L-shaped insertion rod (202b) matches the locking groove (101g), and the L-shaped insertion rod (202b) is movably connected in the arc-shaped groove (201d-2).

Images