Adjustable storage protection type energy-saving lighting device

Abstract

The invention relates to the technical field of lighting, and discloses an adjustable storage protection type energy-saving lighting device which comprises a movable protection frame, an extension opening is formed in the top of the protection frame, a cover plate used for protecting the extension opening is arranged at the top of the protection frame, and a lighting mechanism is arranged in the protection frame. Reinforcing assemblies are arranged on the front face and the back face of the protection frame. The lighting mechanism comprises a first threaded rod rotationally connected to the interior of the protection frame and a motor used for driving the first threaded rod to rotate. According to the adjustable storage protection type energy-saving lighting device, the threaded block moves up and down, then the lighting piece can be driven by the adjusting piece to conduct stretching driving, the unfolded lighting work or the storage protection work is formed, by arranging the adjusting piece, the angle of the unfolded lighting piece can be adjusted, and therefore the requirement for lighting work at different angles is met; and illumination, protection and angle adjustment of the illumination equipment are effectively combined, so that the use effect of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lighting, and in particular to an adjustable storage and protection type energy-saving lighting device. Background Art

[0002] Lighting is a measure that uses various light sources to illuminate work and living places or individual objects. When people work at night or in a poorly lit room, they generally need corresponding lighting devices for lighting processing, so that the staff can better work at night and in a poorly lit environment.

[0003] After searching, the Chinese utility model patent with publication number CN217978597U discloses an energy-saving lighting device with adjustable construction. Through the set lighting lamps, the vision of the workers in the construction can be kept bright, which can prevent the workers from accidental injuries and improve the safety of the workers' work. The lifting function of the device is realized by sliding the lifting rod in the limit ring. The height of the lighting lamp can be adjusted as needed, thereby expanding the lighting range of the lighting lamp and facilitating the use of the workers.

[0004] In the related art, in order to meet the needs of use at different heights and angles, existing lighting devices are generally provided with an adjustment mechanism for adjusting the height and angle of the lighting lamp body. However, in actual use, two different adjustment mechanisms are required to operate the height and angle of the lighting device, which not only lacks the function of orderly adjustment, but also greatly increases the production cost of the equipment. In addition, lighting devices with height adjustment are often large in size and lack the function of storage and protection, which increases the difficulty of carrying and transporting and transportation protection. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides an adjustable storage and protection type energy-saving lighting device. Through the up and down movement of the threaded block, the lighting component can be driven to extend through the adjusting member to form an expanded lighting operation or a storage and protection operation. Through the setting of the adjusting member, the angle of the expanded lighting component can be adjusted to meet the lighting work at different angles, effectively combining the lighting, protection and angle adjustment of the lighting equipment, thereby improving the functionality and practicality of the equipment, and solving the problem that the existing lighting equipment generally only has the height and angle adjustment function, lacks the storage and protection function, and is prone to damage when used in bad environments or when used differently.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable storage protection type energy-saving lighting device, comprising a movable protection frame, a top of the protection frame is provided with an extension opening, and a cover plate for protecting the extension opening is provided on the top of the protection frame, a lighting mechanism is provided inside the protection frame, and a reinforcement component is provided on the front and back of the protection frame;

[0009] The lighting mechanism includes a first threaded rod rotatably connected to the inside of the protective frame and a motor for rotationally driving the first threaded rod, the outer surface of the first threaded rod is threadedly connected to a threaded block, the inside of the protective frame is fixedly connected to a guide rod, the threaded block is slidably connected to the outer surface of the guide rod, and a lighting component is installed on the top of the threaded block through an adjusting component.

[0010] Preferably, the adjusting member comprises a spring fixed to the top of the threaded block, and the top of the spring is fixedly connected to an L-shaped transmission frame, and one side of the L-shaped transmission frame is slidably connected to the outer surface of the guide rod;

[0011] The lighting component comprises a U-shaped frame fixed on the top of the L-shaped transmission frame, and an inclined energy-saving lighting lamp is rotatably connected to the interior of the U-shaped frame through a rotating shaft.

[0012] Preferably, a connecting frame is fixedly connected to one side of the top of the threaded block, an inclined driving frame is hinged to the top of the connecting frame, an articulated seat is hinged to the top of the driving frame, and the articulated seat is slidably connected to the bottom of the energy-saving lighting lamp.

[0013] Preferably, hidden grooves are provided on both sides of the inner wall of the U-shaped frame, and torsion springs are fixedly connected inside the two hidden grooves, and one end of the two torsion springs is fixedly connected to the energy-saving lighting lamp.

[0014] Preferably, the reinforcement assembly comprises a sliding frame that can slide up and down, and the sliding frame is slidably connected to the inside of the protection frame, both ends of the sliding frame extend to the outside of the protection frame, and both ends of the sliding frame are connected to the reinforcement frame;

[0015] A second threaded rod is rotatably connected to the bottom of the inner wall of the protection frame, a transmission block is threadably connected to the second threaded rod, and the transmission block is fixedly connected to the sliding frame.

[0016] Preferably, the reinforcement frame comprises a telescopic block connected to the sliding frame, one end of the telescopic block is fixedly connected to a movable rod, and an L-shaped support seat is fixedly connected between both ends of the movable rod.

[0017] Preferably, the interior of the sliding frame is hollow, the other end of the telescopic block is inserted into the interior of the sliding frame, one side of the protective frame is fixedly connected to two inclined guide frames, and both ends of the movable rod extend to the outside of the two guide frames respectively.

[0018] Preferably, the motor is fixed to the bottom of the protective frame, the output shaft of the motor is fixedly connected to the bottom end of the first threaded rod, the bottom end of the second threaded rod extends to the bottom of the protective frame, the external thread on the outer surface of the second threaded rod is opposite to that of the first threaded rod, and the bottom end of the first threaded rod and the bottom end of the second threaded rod are connected via a belt group.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides an adjustable storage protection type energy-saving lighting device, which has the following beneficial effects:

[0021] 1. The present invention can drive the threaded block to move up and down through the forward and reverse rotation of the first threaded rod, and then can drive the lighting component to extend and drive through the adjusting member, so as to form an unfolded lighting work or a storage protection work. Through the setting of the adjusting member, the angle of the unfolded lighting component can be adjusted to meet the lighting work at different angles, effectively combining the lighting, protection and angle adjustment of the lighting equipment, thereby improving the functionality and practicality of the equipment, and solving the problem that the existing lighting equipment generally only has the function of angle adjustment, lacks the function of storage and protection, and is prone to damage when used in bad environments or when used differently.

[0022] 2. The present invention uses a telescopic block to connect the movable rod with the sliding frame, so that when the sliding frame moves up and down, it can synchronously drive the movable rod to move up and down, and then drive the L-shaped support seat to move up and down, forming a storage protection or deployment support function. Through the setting of two guide frames, the movable rod can be guided when moving up and down, so that when the movable rod moves up and down, it can be driven along the inclination angle of the guide frame, thereby increasing the deployment range of its L-shaped support seat, further enhancing the stability of its lighting device when supporting, and then improving the protection performance of its lighting device when working.

[0023] 3. The present invention connects the first threaded rod and the second threaded rod through a belt group transmission, so that when the first threaded rod is driven to rotate by the motor, the second threaded rod can be driven to rotate synchronously; the second threaded rod is in an opposite state to the external thread on the outer surface of the first threaded rod, so that when the threaded block is driven to move downward by the rotation of the first threaded rod, the second threaded rod can drive the transmission block to move upward by rotation, which is convenient for the drive of the motor, not only can the lighting component be driven to be lifted and expanded or lowered and retracted, but also the two reinforcement frames can be driven to be lifted and stored or lowered and expanded synchronously, and has a good linkage and combination function, which ensures that when the lighting component is extended, the two reinforcement frames can be unfolded synchronously, thereby ensuring the stability of the lighting component when it is unfolded, and solves the problem that the lighting fixture in the prior art is prone to tipping over due to the change in the height center of gravity when it is unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 For the present invention Figure 1 Structural sectional view of the middle protection frame;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the combination of the lighting mechanism and the reinforcement components;

[0027] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of the lighting mechanism;

[0028] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the middle adjusting member;

[0029] Figure 6 For the present invention Figure 4 A partial cross-sectional view of the lighting component;

[0030] Figure 7 For the present invention Figure 3 A schematic diagram of the structure of the middle reinforcement component;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the middle reinforcement frame.

[0032] In the figure: 1. protection frame; 2. cover plate;

[0033] 3. lighting mechanism; 31. first threaded rod; 32. motor; 33. threaded block; 34. guide rod;

[0034] 35, adjusting member; 351, spring; 352, L-shaped transmission frame; 353, connecting frame; 354, driving frame; 355, hinged seat;

[0035] 36. Lighting parts; 361. U-shaped frame; 362. Energy-saving lighting lamp; 363. Hidden slot; 364. Torsion spring;

[0036] 4. reinforcement assembly; 41. sliding frame; 42. second threaded rod; 43. transmission block; 44. belt assembly;

[0037] 45. Reinforcement frame; 451. Telescopic block; 452. Movable rod; 453. L-shaped support seat; 454. Guide frame. 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] Embodiment 1:

[0040] Refer to the attached Figure 1-8 , an adjustable storage protection type energy-saving lighting device, comprising a movable protection frame 1, a stretching opening is opened on the top of the protection frame 1, and a cover plate 2 for protecting the stretching opening is arranged on the top of the protection frame 1, a lighting mechanism 3 is arranged inside the protection frame 1, and a reinforcement component 4 is arranged on the front and back of the protection frame 1;

[0041] The lighting mechanism 3 is arranged to be unfolded through the telescopic opening at the top of the protection frame 1 to form a lighting operation, and is retracted into the protection frame 1 through the extension opening to form a storage protection operation; the strengthening component 4 is arranged to support the lighting device during operation to ensure its stability during lighting operation;

[0042] The lighting mechanism 3 includes a first threaded rod 31 rotatably connected to the inside of the protection frame 1 and a motor 32 for rotating the first threaded rod 31. The outer surface of the first threaded rod 31 is threadedly connected with a thread block 33. The inside of the protection frame 1 is fixedly connected with a guide rod 34. The thread block 33 is slidably connected to the outer surface of the guide rod 34. The top of the thread block 33 is installed with a lighting component 36 through an adjusting component 35.

[0043] The motor 32 is connected to the control system provided on the protective frame 1. It is a forward and reverse motor and is set up using the connection method and coding method of the existing technology. It is used to drive the first threaded rod 31 to rotate forward and reverse. The forward and reverse rotation of the first threaded rod 31 can drive the threaded block 33 to move up and down, and then the lighting component 36 can be driven to extend through the adjustment member 35 to form a lighting work or a storage protection work. Through the setting of the adjustment member 35, the angle of the unfolded lighting component 36 can be adjusted to meet the lighting work at different angles, effectively combining the lighting, protection and angle adjustment of the lighting equipment, thereby improving the functionality and practicality of the equipment, and solving the problem that the existing lighting equipment generally only has the function of angle adjustment and lacks the function of storage protection, so that it is easy to be damaged when used in bad environment or when used differently.

[0044] Refer to the attached Figures 4 to 6 The adjusting member 35 includes a spring 351 fixed to the top of the threaded block 33, and the top of the spring 351 is fixedly connected to an L-shaped transmission frame 352, and one side of the L-shaped transmission frame 352 is slidably connected to the outer surface of the guide rod 34;

[0045] The adjusting member 35 includes an L-shaped transmission frame 352 fixed to the top of the threaded block 33 by a spring 351, which not only facilitates the up and down movement of the threaded block 33, but also directly drives the L-shaped transmission frame 352 to move up and down, thereby forming the unfolding operation of the lighting member 36. When the L-shaped transmission frame 352 moves to the top, the threaded block 33 can continue to move upward, thereby forming the adjustment of the angle of the unfolded lighting member 36, thereby further improving the functionality and practicality of the lighting mechanism 3.

[0046] The lighting component 36 includes a U-shaped frame 361 fixed to the top of the L-shaped transmission frame 352, and an inclined energy-saving lighting lamp 362 is rotatably connected to the interior of the U-shaped frame 361 via a rotating shaft;

[0047] The energy-saving lighting lamp 362 adopts a lamp with energy-saving performance in the prior art, and is connected to the mobile power supply built into the protective frame 1 through a wire. The energy-saving lighting lamp 362 is connected to the inside of the U-shaped frame 361 by rotating the shaft, so that the lighting angle of the energy-saving lighting lamp 362 can be adjusted, which is convenient for lighting work in different ranges and angles, and improves the practical effect of the lighting device.

[0048] Refer to the attached Figure 4 and Figure 5 A connecting frame 353 is fixedly connected to one side of the top of the threaded block 33, and an inclined driving frame 354 is hinged to the top of the connecting frame 353. A hinge seat 355 is hinged to the top of the driving frame 354, and the hinge seat 355 is slidably connected to the bottom of the energy-saving lighting lamp 362;

[0049] When the L-shaped transmission frame 352 moves to the highest point and is completely extended out of the protection frame 1, the continuous rise of the threaded block 33 can drive the connecting frame 353 to move upward, and then drive the inclined driving frame 354 to perform a fan-shaped movement, and then drive the energy-saving lighting lamp 362 to perform a fan-shaped movement at the position of the rotating shaft through the hinge seat 355, forming an angle adjustment operation, which not only has the function of extension adjustment, but also has the function of angle adjustment, and effectively combines the extension adjustment and angle adjustment, which not only improves the functionality of the equipment, but also improves the energy saving and environmental protection of the equipment.

[0050] Refer to the attached Figure 6 Hidden grooves 363 are provided on both sides of the inner wall of the U-shaped frame 361, and torsion springs 364 are fixedly connected inside the two hidden grooves 363, and one end of the two torsion springs 364 is fixedly connected to the energy-saving lighting lamp 362;

[0051] The hidden groove 363 is provided to facilitate the installation of the torsion spring 364. The torsion spring 364 is provided to improve the stability of the energy-saving lamp 362 after the angle is adjusted, thereby preventing the energy-saving lamp 362 from becoming loose after the angle is adjusted, thereby affecting the lighting effect.

[0052] Refer to the attached Figure 7 and Figure 8 The reinforcing assembly 4 includes a sliding frame 41 that can slide up and down, and the sliding frame 41 is slidably connected to the inside of the protection frame 1, both ends of the sliding frame 41 extend to the outside of the protection frame 1, and both ends of the sliding frame 41 are connected to a reinforcing frame 45;

[0053] The two reinforcing frames 45 can be driven to move up and down by the upward movement of the sliding frame 41. The upward movement of the two reinforcing frames 45 can form a storage operation, which reduces the volume of the lighting device and improves the convenience of subsequent carrying and storage. The downward movement of the two reinforcing frames 45 can form an unfolding operation, which ensures the stability of the lighting device during operation and the stability of the lighting device during adjustment, and reduces the problem of the lighting device being damaged by the impact force.

[0054] The bottom of the inner wall of the protection frame 1 is rotatably connected with a second threaded rod 42, the second threaded rod 42 is threadably connected with a transmission block 43, and the transmission block 43 is fixedly connected to the sliding frame 41;

[0055] The rotation of the second threaded rod 42 can drive the transmission block 43 to move up and down, and further drive the sliding frame 41 to move up and down. The rotation drive of the second threaded rod 42 can be driven manually or by a motor.

[0056] The working principle of the adjustable storage protection type energy-saving lighting device of the present invention is as follows:

[0057] The motor 32 drives the first threaded rod 31 to rotate, and the threaded block 33 can be driven to move up and down. The upward movement of the threaded block 33 can drive the L-shaped transmission frame 352 to move upward through the spring 351, and then the lighting component 36 can be driven to move upward through the L-shaped transmission frame 352, and extend through the extension opening, and the energy-saving lighting lamp 362 in the lighting component 36 performs lighting work;

[0058] When the L-shaped transmission frame 352 moves to the highest point, in conjunction with the upward movement of the threaded block 33, not only can the spring 351 be compressed to ensure the stability of the L-shaped transmission frame 352 after the lifting movement, but also the connecting frame 353 can be driven to move upward. The upward movement of the connecting frame 353 can drive the inclined driving frame 354 to perform a fan-shaped movement, and then the energy-saving lighting lamp 362 can be driven to perform a fan-shaped movement at the position of the rotating shaft through the hinge seat 355, thereby forming an angle adjustment operation;

[0059] Through the downward movement of the threaded block 33, not only can the connecting frame 353 and the driving frame 354 move downward preferentially, so that the lighting component 36 after angle adjustment can be tilted downward for storage, but also the L-shaped transmission frame 352 can be driven downward by the spring 351 afterwards, thereby driving the lighting component 36 that has been tilted downward for storage to be stored again in the protective frame 1 for protection.

[0060] Embodiment 2: Based on embodiment 1, the difference is that;

[0061] Refer to the attached Figure 7 and Figure 8 The reinforcing frame 45 includes a telescopic block 451 connected to the sliding frame 41, one end of the telescopic block 451 is fixedly connected to a movable rod 452, and an L-shaped support seat 453 is fixedly connected between the two ends of the movable rod 452;

[0062] The movable rod 452 is connected to the sliding frame 41 through the telescopic block 451, so that when the sliding frame 41 moves up and down, it can synchronously drive the movable rod 452 to move up and down, and then drive the L-shaped support seat 453 to move up and down, forming the function of storage protection or expansion support.

[0063] The interior of the sliding frame 41 is hollow, and the other end of the telescopic block 451 is inserted into the interior of the sliding frame 41. Two inclined guide frames 454 are fixedly connected to one side of the protection frame 1, and the two ends of the movable rod 452 extend to the outside of the two guide frames 454 respectively.

[0064] By setting up two guide frames 454, the movable rod 452 can be guided when moving up and down, so that the movable rod 452 can be driven along the inclination angle of the guide frame 454 when moving up and down, thereby increasing the expansion range of its L-shaped support seat 453, further enhancing the stability of its lighting device when supporting, and thereby improving the protective performance of its lighting device when working.

[0065] Embodiment 3: Based on embodiment 1, the difference is that;

[0066] Refer to the attached Figure 4 and Figure 7 The motor 32 is fixed to the bottom of the protection frame 1, the output shaft of the motor 32 is fixedly connected to the bottom end of the first threaded rod 31, the bottom end of the second threaded rod 42 extends to the bottom of the protection frame 1, the second threaded rod 42 is opposite to the external thread on the outer surface of the first threaded rod 31, and the bottom end of the first threaded rod 31 and the bottom end of the second threaded rod 42 are connected by a belt group 44;

[0067] The first threaded rod 31 and the second threaded rod 42 are connected by a belt group 44, so that when the first threaded rod 31 is driven to rotate by the motor 32, the second threaded rod 42 can be driven to rotate synchronously; the external threads on the outer surfaces of the second threaded rod 42 and the first threaded rod 31 are in opposite states, so that when the first threaded rod 31 is rotated to drive the thread block 33 to move downward, the second threaded rod 42 can drive the transmission block 43 to move upward by rotation;

[0068] On the contrary, when the threaded block 33 moves upward, the transmission block 43 can move downward synchronously, so that it is convenient to drive the motor 32, which can not only drive the lighting component 36 to be lifted and expanded or lowered and retracted, but also can synchronously drive the two reinforcement frames 45 to be lifted and stored or lowered and expanded. It has good linkage and combination function, further improves the functionality and practicality of the equipment, and ensures that when the lighting component 36 is extended, the two reinforcement frames 45 can be unfolded synchronously, thereby ensuring the stability of the lighting component 36 when it is unfolded, and solves the problem of the lighting fixture in the prior art being prone to tipping over due to the change in the height center of gravity when it is unfolded.

[0069] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0070] 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. An adjustable storage protection type energy-saving lighting device, comprising a movable protection frame (1), the top of the protection frame (1) is provided with an extension opening, and the top of the protection frame (1) is provided with a cover plate (2) for protecting the extension opening, characterized in that: The protection frame (1) is provided with an illumination mechanism (3) inside, and the front and back sides of the protection frame (1) are provided with reinforcement components (4); The lighting mechanism (3) comprises a first threaded rod (31) rotatably connected to the inside of the protective frame (1) and a motor (32) for rotationally driving the first threaded rod (31); a threaded block (33) is threadedly connected to the outer surface of the first threaded rod (31); a guide rod (34) is fixedly connected to the inside of the protective frame (1); the threaded block (33) is slidably connected to the outer surface of the guide rod (34); and a lighting component (36) is installed on the top of the threaded block (33) via an adjusting component (35).

2. The adjustable storage protection type energy-saving lighting device according to claim 1, characterized in that: The adjusting member (35) comprises a spring (351) fixed to the top of the threaded block (33), and the top of the spring (351) is fixedly connected to an L-shaped transmission frame (352), and one side of the L-shaped transmission frame (352) is slidably connected to the outer surface of the guide rod (34); The lighting component (36) comprises a U-shaped frame (361) fixed to the top of the L-shaped transmission frame (352), and an inclined energy-saving lighting lamp (362) is rotatably connected to the interior of the U-shaped frame (361) via a rotating shaft.

3. The adjustable storage protection type energy-saving lighting device according to claim 2, characterized in that: A connecting frame (353) is fixedly connected to one side of the top of the threaded block (33); an inclined driving frame (354) is hingedly connected to the top of the connecting frame (353); an articulated seat (355) is hingedly connected to the top of the driving frame (354); and the articulated seat (355) is slidably connected to the bottom of the energy-saving lighting lamp (362).

4. The adjustable storage protection type energy-saving lighting device according to claim 2, characterized in that: Hidden grooves (363) are provided on both sides of the inner wall of the U-shaped frame (361), and torsion springs (364) are fixedly connected inside the two hidden grooves (363), and one end of the two torsion springs (364) is fixedly connected to the energy-saving lighting lamp (362).

5. The adjustable storage protection type energy-saving lighting device according to claim 1, characterized in that: The reinforcing assembly (4) comprises a sliding frame (41) which can slide up and down, and the sliding frame (41) is slidably connected to the inside of the protective frame (1), both ends of the sliding frame (41) extend to the outside of the protective frame (1), and both ends of the sliding frame (41) are connected to the reinforcing frame (45); A second threaded rod (42) is rotatably connected to the bottom of the inner wall of the protection frame (1), a transmission block (43) is threadedly connected to the second threaded rod (42), and the transmission block (43) is fixedly connected to the sliding frame (41).

6. The adjustable storage protection type energy-saving lighting device according to claim 5, characterized in that: The reinforcing frame (45) comprises a telescopic block (451) connected to the sliding frame (41), one end of the telescopic block (451) is fixedly connected to a movable rod (452), and an L-shaped support seat (453) is fixedly connected between the two ends of the movable rod (452).

7. The adjustable storage protection type energy-saving lighting device according to claim 6, characterized in that: The interior of the sliding frame (41) is hollow, the other end of the telescopic block (451) is inserted into the interior of the sliding frame (41), one side of the protection frame (1) is fixedly connected to two inclined guide frames (454), and the two ends of the movable rod (452) respectively extend to the outside of the two guide frames (454).

8. The adjustable storage protection type energy-saving lighting device according to claim 5, characterized in that: The motor (32) is fixed to the bottom of the protective frame (1), the output shaft of the motor (32) is fixedly connected to the bottom end of the first threaded rod (31), the bottom end of the second threaded rod (42) extends to the bottom of the protective frame (1), the external threads of the second threaded rod (42) and the outer surface of the first threaded rod (31) are in opposite states, and the bottom end of the first threaded rod (31) and the bottom end of the second threaded rod (42) are connected by a belt group (44).

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