Yacht sunshade

Abstract

The utility model provides a yacht sunshade, which relates to the technical field of yacht sunshade, and comprises an L-shaped connecting frame, connecting seats are symmetrically and fixedly connected to the top of the L-shaped connecting frame close to the edge, a rotating shaft is rotatably connected between the outer surfaces of the two connecting seats, and coil springs are connected to the outer surfaces of the rotating shaft close to the two ends. And one end of the coil spring is connected with the outer surface of the connecting seat. According to the sunshade, the driving mechanism is arranged to control the movable plate in the telescopic mechanism to be far away from or close to the fixed plate, when the movable plate is far away from the fixed plate, the sunshade cloth can be pulled open through cooperation of the first connecting block and the framework, and when the movable plate is close to the fixed plate, the sunshade cloth can be rolled to the surface of the rotating shaft to complete storage through cooperation of the coil spring; therefore, the problem that an existing yacht sunshade does not have the folding storage function is solved, the sunshade function is achieved, the requirement for basking of a user can be met by folding the sunshade cloth, and the use function is good.

Description

Technical Field

[0001] The utility model relates to the technical field of yacht awnings, in particular to a yacht awning. Background Art

[0002] A yacht is a high-end durable consumer product for water entertainment. It integrates functions such as navigation, sports, entertainment, and leisure to meet the needs of individuals and families to enjoy life. In the hot summer, yachts are often easily exposed to the sun when in use, so most of them are installed with awnings.

[0003] In the prior art, for example, Chinese patent publication number CN219770104U discloses a yacht awning, including: support mechanisms symmetrically arranged on both sides of the yacht body, the support mechanisms including positioning rods and support rods that are far away from each other. The present application adopts a telescopic design of the positioning rod and the support rod, so that the inner rod can be stored, which is convenient for installing and disassembling the fixing rod. It adopts a matching design of a pin shaft and a limit column, so that the insert block can be fixed in the slot, and the fixing rod is fixed thereto. Compared with the prior art, the present application effectively reduces the use of bolts, making the disassembly and installation of the yacht awning simpler and faster, and has practicality.

[0004] Although the above patent makes the disassembly and installation of the yacht awning relatively simple and quick, the existing yacht awnings are usually simple in structure and do not have the folding and storage function. When used in spring and autumn, they cannot meet the needs of some people who like to sunbathe, and the functionality needs to be improved. Therefore, in response to the above problems, we propose a new type of yacht awning. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that yacht awnings usually have a simple structure, do not have a folding and storage function, cannot meet the needs of some people who like to sunbathe when used in spring and autumn, and the functionality needs to be improved, and to propose a yacht awning.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a yacht awning, comprising an L-shaped connecting frame, a connecting seat is symmetrically fixedly connected to the top of the L-shaped connecting frame near the edge, a rotating shaft is rotatably connected between the outer surfaces of the two connecting seats, the outer surface of the rotating shaft is connected to coil springs near both ends, one end of the coil spring is connected to the outer surface of the connecting seat, a sunshade cloth is rolled up on the outer surface of the rotating shaft, a frame is installed on the front side of the sunshade cloth, a first connecting block is fixedly connected to the bottom of the frame, a driving mechanism is provided on the front surface of the L-shaped connecting frame, a telescopic mechanism is provided at the bottom of the driving mechanism, a guiding mechanism is provided at the bottom of the telescopic mechanism, the driving mechanism comprises a mounting plate, the mounting plate is fixedly connected to the front surface of the L-shaped connecting frame near the middle, a connecting shaft is rotatably connected to the top of the mounting plate near the front corner, a second gear is fixedly connected to the top of the connecting shaft, an electric push rod is fixedly connected to the top of the mounting plate, a second connecting block is fixedly connected to the front end of the electric push rod, a rack is fixedly connected to the bottom of the second connecting block, and the rack is meshed with the second gear.

[0007] Preferably, the telescopic mechanism comprises a fixing plate, a rear surface of the fixing plate is connected to a front surface of the L-shaped connecting frame, and a top of the fixing plate is connected to a bottom of the mounting plate.

[0008] Preferably, a first rotating pin is symmetrically connected to the interior of the fixed plate near the front corner, a first rotating sleeve is fixedly connected to the outer surface of the first rotating pin, and a first connecting rod is fixedly connected to the outer surfaces of the two first rotating sleeves near the front.

[0009] Preferably, the outer surfaces of the two first connecting rods are fixedly connected to the front sides with second rotating sleeves, and the inner surface walls of the two second rotating sleeves are rotatably connected with second rotating pins.

[0010] Preferably, the outer surfaces of the two second rotating pins are rotatably connected with the first connecting ears, the front surfaces of the two first connecting ears are fixedly connected with circular sleeves, and the inner surface walls of the two circular sleeves are slidably connected with a limiting axis.

[0011] Preferably, the outer surfaces of the two circular sleeves are fixedly connected with second connecting ears near the front side, the inner surface walls of the two second connecting ears are rotatably connected with third rotating pins, and the outer surfaces of the two third rotating pins are fixedly connected with third rotating sleeves.

[0012] Preferably, the outer surfaces of the two third rotating sleeves are fixedly connected to the second connecting rod near the front side, the front ends of the two second connecting rods are fixedly connected to the fourth rotating sleeve, the inner walls of the two fourth rotating sleeves are rotatably connected to the fourth rotating pins, and a movable plate is movably connected between the outer surfaces of the two fourth rotating pins, and the top of the movable plate is connected to the first connecting block.

[0013] Preferably, the bottom ends of the two first rotating pins are fixedly connected to the first gears, the outer surfaces of the two first gears are meshingly connected, and the top end of one of the first rotating pins is fixedly connected to the bottom end of the connecting shaft.

[0014] Preferably, a plurality of reinforcing ribs are fixedly connected between the front surface and the inner top of the L-shaped connecting frame, and anti-dropping blocks are fixedly connected to both ends of the limiting shaft.

[0015] Preferably, the guide mechanism includes a third connecting block, the third connecting block is fixedly connected to the bottom of the movable plate, the rear surface of the third connecting block is fixedly connected to a multi-section telescopic rod, the rear end of the multi-section telescopic rod is fixedly connected to a fourth connecting block, and the top of the fourth connecting block is connected to the bottom of the fixed plate.

[0016] Compared with the prior art, the advantages and positive effects of the utility model are:

[0017] 1. In the utility model, by setting a driving mechanism, the movable plate in the telescopic mechanism can be controlled to move away from or close to the fixed plate. When the movable plate is away from the fixed plate, the sunshade cloth can be opened by cooperating with the first connecting block and the frame. When the movable plate is close to the fixed plate, the sunshade cloth can be rolled up to the surface of the rotating shaft in cooperation with the coil spring to complete the storage, thereby solving the problem that the existing yacht awnings do not have the folding and storage function. It not only has the sunshade function but also can meet the user's sunbathing needs by folding the sunshade cloth, and the use function is better.

[0018] 2. In the utility model, when the movable plate is moved away from the fixed plate under the cooperation of the driving mechanism and the telescopic mechanism, the movable plate will simultaneously drive the third connecting block to move. At this time, the third connecting block will pull the multi-section telescopic rod to extend, so that the movable plate can move stably in a straight line. When the movable plate is reset, the multi-section telescopic rod will shrink synchronously, thereby improving the stability and reliability of the device when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a yacht awning is proposed for the utility model;

[0020] Figure 2 Another perspective view of a yacht awning proposed by the utility model;

[0021] Figure 3A partial structural schematic diagram of a yacht awning is provided for the utility model;

[0022] Figure 4 The utility model provides a schematic diagram of the telescopic mechanism structure of a yacht awning;

[0023] Figure 5 The utility model provides a schematic diagram of the driving mechanism structure of a yacht awning;

[0024] Figure 6 The utility model provides a structural schematic diagram of a guide mechanism of a yacht awning.

[0025] Legend: 1. L-shaped connecting frame; 11. Reinforcement rib; 12. Connecting seat; 13. Rotating shaft; 14. Coil spring; 2. Sunshade cloth; 21. Frame; 22. First connecting block; 3. Telescopic mechanism; 301. Fixed plate; 302. First rotating pin; 303. First rotating sleeve; 304. First gear; 305. First connecting rod; 306. Second rotating sleeve; 307. Second rotating pin; 308. First connecting ear; 309. Round sleeve; 310. Limiting shaft; 311. Anti-locking mechanism The stripping block; 312, the second connecting ear; 313, the third rotating pin; 314, the third rotating sleeve; 315, the second connecting rod; 316, the fourth rotating sleeve; 317, the fourth rotating pin; 318, the movable plate; 4, the driving mechanism; 401, the mounting plate; 402, the electric push rod; 403, the second connecting block; 404, the rack; 405, the connecting shaft; 406, the second gear; 5, the guiding mechanism; 501, the third connecting block; 502, the multi-section telescopic rod; 503, the fourth connecting block. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0028] Embodiment 1, as Figure 1-Figure 6As shown, the utility model provides a yacht awning, including an L-shaped connecting frame 1, a connecting seat 12 is symmetrically fixedly connected to the top of the L-shaped connecting frame 1 near the edge, a rotating shaft 13 is rotatably connected between the outer surfaces of the two connecting seats 12, the outer surface of the rotating shaft 13 is connected to a coil spring 14 near both ends, one end of the coil spring 14 is connected to the outer surface of the connecting seat 12, a sunshade cloth 2 is rolled up on the outer surface of the rotating shaft 13, a frame 21 is installed on the front side of the sunshade cloth 2, a first connecting block 22 is fixedly connected to the bottom of the frame 21, a driving mechanism 4 is arranged on the front surface of the L-shaped connecting frame 1, a telescopic mechanism 3 is arranged at the bottom of the driving mechanism 4, a guiding mechanism 5 is arranged at the bottom of the telescopic mechanism 3, the driving mechanism 4 includes a mounting plate 401, the mounting plate 4 01 is fixedly connected to the front surface of the L-shaped connecting frame 1 near the middle position, the top of the mounting plate 401 near the front corner is rotatably connected with a connecting shaft 405, the top of the connecting shaft 405 is fixedly connected with a second gear 406, the top of the mounting plate 401 is fixedly connected with an electric push rod 402, the front end of the electric push rod 402 is fixedly connected with a second connecting block 403, the bottom of the second connecting block 403 is fixedly connected with a rack 404, the rack 404 and the second gear 406 are meshingly connected, the telescopic mechanism 3 includes a fixed plate 301, the rear surface of the fixed plate 301 is connected to the front surface of the L-shaped connecting frame 1, the top of the fixed plate 301 is connected to the bottom of the mounting plate 401, and the inside of the fixed plate 301 near the front corner rotates symmetrically A first rotating pin 302 is connected, and a first rotating sleeve 303 is fixedly connected to the outer surface of the first rotating pin 302. The outer surfaces of the two first rotating sleeves 303 are fixedly connected to the first connecting rod 305 near the front side. The outer surfaces of the two first connecting rods 305 are fixedly connected to the second rotating sleeve 306 near the front side. The inner surfaces of the two second rotating sleeves 306 are rotatably connected with a second rotating pin 307. The outer surfaces of the two second rotating pins 307 are rotatably connected with a first connecting ear 308. The front surfaces of the two first connecting ears 308 are fixedly connected with a circular sleeve 309. The inner surfaces of the two circular sleeves 309 are slidably connected with a limiting axis 310. The outer surfaces of the two circular sleeves 309 are fixedly connected with a second connecting rod 306 near the front side. The connecting ears 312, the inner surface walls of the two second connecting ears 312 are rotatably connected with the third rotating pin 313, the outer surfaces of the two third rotating pins 313 are fixedly connected with the third rotating sleeve 314, the outer surfaces of the two third rotating sleeves 314 are fixedly connected with the second connecting rod 315 near the front side, the front ends of the two second connecting rods 315 are fixedly connected with the fourth rotating sleeve 316, the inner surface walls of the two fourth rotating sleeves 316 are rotatably connected with the fourth rotating pin 317, the outer surfaces of the two fourth rotating pins 317 are movably connected with a movable plate 318, the top of the movable plate 318 is connected to the first connecting block 22, the bottom ends of the two first rotating pins 302 are fixedly connected with the first gear 304, and the outer surfaces of the two first gears 304 are meshed and connected,The top end of one of the first rotating pins 302 is fixedly connected to the bottom end of the connecting shaft 405.

[0029] The effect achieved by the entire embodiment 1 is that when installing the device, the L-shaped connecting frame 1 can be fixed to the front windshield of the yacht with bolts to complete the installation. When the sunshade 2 needs to be opened to block the sunlight, the electric push rod 402 is started to cooperate with the second connecting block 403 to pull the rack 404 to move backward. At this time, the second gear 406 will be driven to rotate counterclockwise under the action of the rack 404. When the second gear 406 rotates counterclockwise, it will drive one of the first gears 304 in the telescopic mechanism 3 to rotate counterclockwise through the connecting shaft 405, and the other first gear 304 will rotate clockwise, thereby driving the two first rotating pins 302 and the first rotating pins 302 at the same time. The movable sleeve 303 rotates in the opposite direction, and the two first rotating sleeves 303 drive the two first connecting rods 305 to rotate in the opposite direction and reduce the angle between them. At this time, the second rotating sleeve 306 at the other end of the first connecting rod 305 rotates with the first connecting ear 308 under the action of the second rotating pin 307 and drives the two circular sleeves 309 to approach each other. At this time, the two second connecting ears 312 on the front side of the circular sleeve 309 follow the circular sleeve 309 to approach each other and then rotate with the third rotating sleeve 314 under the action of the third rotating pin 313 and drive the two second connecting rods 315 to rotate in the opposite direction. When the two second connecting rods 315 rotate in the opposite direction, due to The distance between the two fourth rotating sleeves 316 at the other end cannot be changed, so the fourth rotating sleeve 316 will rotate with the movable plate 318 under the action of the fourth rotating pin 317 and push the movable plate 318 to move forward and away from the fixed plate 301. At this time, the movable plate 318 will pull the frame 21 and the front end of the sunshade cloth 2 forward through the first connecting block 22, thereby making the sunshade cloth 2 rolled up on the surface of the rotating shaft 13 unfold for sunshade. During the unfolding of the sunshade cloth 2, the rotating shaft 13 will rotate with it and pull one end of the winding spring 14 to make it slowly elongated. When the sunshade cloth 2 needs to be retracted for sun exposure, the electric push rod 402 is started to cooperate with the second connecting rod 13 to The connecting block 403 pushes the rack 404 to move forward, so that the movable plate 318 is reset and drives the frame 21 back to the initial position. At this time, the coil spring 14 gradually loses its tension and drives the rotating shaft 13 to automatically reel in and wrap the sunshade cloth 2 around the surface of the rotating shaft 13, thereby solving the problem that the existing yacht awnings do not have the folding and storage function. It not only has the sunshade function but also can meet the user's needs for sunbathing by folding the sunshade cloth 2. The use function is better. The limiting shaft 310 is mainly used to limit the circular sleeve 309, so that the two circular sleeves 309 can always be in the same straight line, avoiding bending and damage of the telescopic mechanism 3.

[0030] Embodiment 2, as Figure 1-Figure 6As shown, a plurality of reinforcing ribs 11 are fixedly connected between the front surface and the inner top of the L-shaped connecting frame 1, anti-dropping blocks 311 are fixedly connected at both ends of the limiting shaft 310, and the guiding mechanism 5 includes a third connecting block 501, and the third connecting block 501 is fixedly connected to the bottom of the movable plate 318, and a multi-section telescopic rod 502 is fixedly connected to the rear surface of the third connecting block 501, and a fourth connecting block 503 is fixedly connected to the rear end of the multi-section telescopic rod 502, and the top of the fourth connecting block 503 is connected to the bottom of the fixed plate 301.

[0031] The effect achieved by the entire embodiment 2 is that, with the cooperation of the driving mechanism 4 and the telescopic mechanism 3, the movable plate 318 is moved away from the fixed plate 301, and the movable plate 318 will simultaneously drive the third connecting block 501 to move. At this time, the third connecting block 501 will pull the multi-section telescopic rod 502 to extend, so that the movable plate 318 can move stably in a straight line. When the movable plate 318 is reset, the multi-section telescopic rod 502 will shrink synchronously, thereby improving the stability and reliability of the device during use. The reinforcement rib 11 is provided to improve the strength of the L-shaped connecting frame 1, and the anti-detachment block 311 is provided to limit the circular sleeve 309, thereby preventing the circular sleeve 309 and the limiting shaft 310 from detaching.

[0032] Working principle: When installing the device, the L-shaped connecting frame 1 is fixed to the front windshield of the yacht with bolts to complete the installation. When the sunshade 2 needs to be opened to block the sunlight, the electric push rod 402 is started to cooperate with the second connecting block 403 to pull the rack 404 backward. At this time, the second gear 406 is driven to rotate counterclockwise under the action of the rack 404. When the second gear 406 rotates counterclockwise, it will drive one of the first gears 304 in the telescopic mechanism 3 to rotate counterclockwise through the connecting shaft 405, and the other first gear 304 will rotate clockwise, thereby driving the two first rotating pins 302 and the first rotating sleeve 303 to rotate in the opposite direction at the same time. At this time, the two first rotating sleeves 303 will drive the two The first connecting rod 305 rotates in the opposite direction and reduces the angle between the two. At this time, the second rotating sleeve 306 at the other end of the first connecting rod 305 will rotate with the first connecting ear 308 under the action of the second rotating pin 307 and drive the two circular sleeves 309 to approach each other. At this time, the two second connecting ears 312 on the front side of the circular sleeve 309 follow the circular sleeve 309 to approach each other and will rotate with the third rotating sleeve 314 under the action of the third rotating pin 313 and drive the two second connecting rods 315 to rotate in the opposite direction. When the two second connecting rods 315 rotate in the opposite direction, the distance between the two fourth rotating sleeves 316 at the other end cannot be changed. Therefore, the fourth rotating sleeve 316 will rotate at the action of the fourth rotating pin 317. The movable plate 318 rotates and pushes the movable plate 318 to move forward and away from the fixed plate 301. At this time, the movable plate 318 pulls the frame 21 and the front end of the sunshade cloth 2 forward through the first connecting block 22, thereby making the sunshade cloth 2 rolled up on the surface of the rotating shaft 13 unfold for sunshade. During the unfolding of the sunshade cloth 2, the rotating shaft 13 will rotate along and pull one end of the coil spring 14 to slowly stretch it. When the sunshade cloth 2 needs to be rolled up to bask in the sun, the movable plate 318 can be reset and the frame 21 can be driven back to its initial position by starting the electric push rod 402 and cooperating with the second connecting block 403 to push the rack 404 forward. At this time, the coil spring 14 gradually loses its tension and drives the rotating shaft 13 to automatically retract. The sunshade cloth 2 is rolled up and wound around the surface of the rotating shaft 13, thereby solving the problem that the existing yacht awnings do not have the folding and storage function. It not only has the sunshade function but also can meet the user's sunbathing needs by folding the sunshade cloth 2. The use function is better. In addition, with the cooperation of the driving mechanism 4 and the telescopic mechanism 3, when the movable plate 318 is away from the fixed plate 301, the movable plate 318 will simultaneously drive the third connecting block 501 to move. At this time, the third connecting block 501 will pull the multi-section telescopic rod 502 to extend, so that the movable plate 318 can move stably in a straight line. When the movable plate 318 is reset, the multi-section telescopic rod 502 will shrink synchronously, thereby improving the stability and reliability of the device when in use.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A yacht awning, comprising an L-shaped connecting frame (1), characterized in that: A connecting seat (12) is symmetrically fixedly connected to the top of the L-shaped connecting frame (1) near the edge, a rotating shaft (13) is rotatably connected between the outer surfaces of the two connecting seats (12), and the outer surfaces of the rotating shaft (13) near both ends are connected to coil springs (14), one end of the coil spring (14) is connected to the outer surface of the connecting seat (12), a sunshade cloth (2) is rolled up on the outer surface of the rotating shaft (13), a frame (21) is installed on the front side of the sunshade cloth (2), and a first connecting block (22) is fixedly connected to the bottom of the frame (21), a driving mechanism (4) is provided on the front surface of the L-shaped connecting frame (1), a telescopic mechanism (3) is provided at the bottom of the driving mechanism (4), and a guiding mechanism (5) is provided at the bottom of the telescopic mechanism (3); The driving mechanism (4) comprises a mounting plate (401), wherein the mounting plate (401) is fixedly connected to a front surface of the L-shaped connecting frame (1) at a position close to the middle thereof, a top of the mounting plate (401) is rotatably connected to a connecting shaft (405) at a position close to the front corner, a top end of the connecting shaft (405) is fixedly connected to a second gear (406), an electric push rod (402) is fixedly connected to the top of the mounting plate (401), a front end of the electric push rod (402) is fixedly connected to a second connecting block (403), a bottom of the second connecting block (403) is fixedly connected to a rack (404), and the rack (404) and the second gear (406) are meshingly connected.

2. The yacht awning according to claim 1, characterized in that: The telescopic mechanism (3) comprises a fixing plate (301), the rear surface of the fixing plate (301) being connected to the front surface of the L-shaped connecting frame (1), and the top of the fixing plate (301) being connected to the bottom of the mounting plate (401).

3. The yacht awning according to claim 2, characterized in that: A first rotating pin (302) is symmetrically rotatably connected to the interior of the fixed plate (301) near the front corner, a first rotating sleeve (303) is fixedly connected to the outer surface of the first rotating pin (302), and a first connecting rod (305) is fixedly connected to the outer surfaces of the two first rotating sleeves (303) near the front.

4. The yacht awning according to claim 3, characterized in that: The outer surfaces of the two first connecting rods (305) are fixedly connected to a second rotating sleeve (306) at positions close to the front side, and the inner surface walls of the two second rotating sleeves (306) are rotatably connected to a second rotating pin (307).

5. The yacht awning according to claim 4, characterized in that: The outer surfaces of the two second rotating pins (307) are both rotatably connected to the first connecting ears (308), the front surfaces of the two first connecting ears (308) are both fixedly connected to the circular sleeves (309), and the inner surface walls of the two circular sleeves (309) are slidably connected to a limiting axis (310).

6. The yacht awning according to claim 5, characterized in that: The outer surfaces of the two circular sleeves (309) are fixedly connected to second connecting ears (312) near the front side, the inner surface walls of the two second connecting ears (312) are rotatably connected to third rotating pins (313), and the outer surfaces of the two third rotating pins (313) are fixedly connected to third rotating sleeves (314).

7. The yacht awning according to claim 6, characterized in that: The outer surfaces of the two third rotating sleeves (314) are fixedly connected to the second connecting rods (315) at positions near the front side, the front ends of the two second connecting rods (315) are fixedly connected to the fourth rotating sleeves (316), the inner surfaces of the two fourth rotating sleeves (316) are rotatably connected to the fourth rotating pins (317), and a movable plate (318) is movably connected between the outer surfaces of the two fourth rotating pins (317), and the top of the movable plate (318) is connected to the bottom of the first connecting block (22).

8. The yacht awning according to claim 7, characterized in that: The bottom ends of the two first rotating pins (302) are fixedly connected to the first gear (304), and the outer surfaces of the two first gears (304) are meshingly connected, wherein the top end of one of the first rotating pins (302) is fixedly connected to the bottom end of the connecting shaft (405).

9. The yacht awning according to claim 8, characterized in that: A plurality of reinforcing ribs (11) are fixedly connected between the front surface and the inner top of the L-shaped connecting frame (1), and anti-dropping blocks (311) are fixedly connected to both ends of the limiting shaft (310).

10. The yacht awning according to claim 9, characterized in that: The guide mechanism (5) comprises a third connection block (501), the third connection block (501) being fixedly connected to the bottom of the movable plate (318), the rear surface of the third connection block (501) being fixedly connected to a multi-section telescopic rod (502), the rear end of the multi-section telescopic rod (502) being fixedly connected to a fourth connection block (503), the top of the fourth connection block (503) being connected to the bottom of the fixed plate (301).

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