Outdoor display propaganda frame for environmental art design

Abstract

The invention relates to the technical field of propaganda supports, in particular to an outdoor display propaganda frame for environmental art design, which comprises a stabilizing component, a lifting component, a rotating component, a pasting component and a stretching component, the lifting component is arranged in the middle of the top end of the stabilizing component, and the pasting component can be pasted through mutual cooperation between the lifting component and the rotating component; content needing to be propagandized can be conveniently displayed to audiences around, the propaganda effect of environmental art design is improved, more propaganda content can be displayed in a limited space, the display area is increased, the inclination angle of propaganda works can be adjusted by opening the stretching assembly, the situation that the watching vision of the public is affected by different kinds of illumination is avoided, and the propaganda effect is improved. The propaganda frame is simple in structure and convenient to use, audiences can watch propaganda content more clearly at any time, the propaganda efficiency of environmental art design works is further improved, wind power and stress borne by the propaganda frame are reduced, the durability of the propaganda frame in use is improved, and the service life of the propaganda frame is further prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of application of publicity brackets, in particular to an outdoor display publicity bracket for environmental art design. Background Art

[0002] Environmental art design refers to a practical art that integrates the design of the indoor and outdoor spatial environment of a building through art design. Environmental art involves a wide range of disciplines, including architecture, urban planning, ergonomics, environmental psychology, design aesthetics, sociology, literature, history, archaeology, religion, environmental ecology, environmental behavior and other disciplines. In order to improve people's understanding of environmental art design, it is usually necessary to post environmental art design works on propaganda racks for outdoor publicity.

[0003] However, the existing outdoor display and publicity racks for environmental art design still have great defects when in use. The existing outdoor display and publicity racks for environmental art design have poor stability when in use. Not only can the publicity racks not be moved to different areas for installation and use more conveniently, but they can also not adapt to different environments. They are prone to tipping over due to adverse factors such as weather, and there are certain safety hazards, resulting in low safety when the outdoor publicity racks are in use. In addition, the existing outdoor display and publicity racks for environmental art design have poor flexibility, and not only can they not attract the attention of the audience, but they can also not show the content to be promoted more clearly to the audience. In addition, the existing outdoor display and publicity racks for environmental art design cannot better increase the display area in a limited space, resulting in poor publicity effects of environmental art. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing outdoor display and publicity racks for environmental art design have poor stability when in use. Not only can the publicity racks not be moved to different areas for installation and use more conveniently, but they can also not adapt to different environments and are easily overturned due to adverse factors such as weather. There are certain safety hazards, resulting in low safety when the outdoor publicity racks are used; and the existing outdoor display and publicity racks for environmental art design have poor flexibility, not only can they not attract the attention of the audience, but they can also not display the content to be promoted more clearly to the audience; and the existing outdoor display and publicity racks for environmental art design cannot better increase the display area in a limited space, resulting in poor publicity effect of environmental art. Therefore, an outdoor display and publicity rack for environmental art design is proposed.

[0005] The objective of the present invention can be achieved through the following technical scheme: an outdoor display and publicity rack for environmental art design, comprising a stabilizing component, a lifting component, a rotating component, a posting component and a stretching component, wherein the lifting component is arranged at the middle of the top end of the stabilizing component, the rotating component is arranged at the top of the lifting component, the posting component is arranged at the middle of the top end of the rotating component, a support rod is arranged at the bottom of the posting component, a plurality of arc-shaped plates are axially evenly spaced at the top of the outer wall of the support rod, the stretching component is arranged at the middle of the support rod, a lifting plate is arranged on the stretching component, and a plurality of connecting plates of the same number as the arc-shaped plates are hinged at even intervals on the outer wall of the lifting plate.

[0006] Preferably, a base frame is provided on the stabilizing component, the four corners of the bottom of the base frame are connected to rollers through rotating shafts, a counterweight block is connected to the middle of the top of the base frame through bolts, and the four corners of the base frame are provided with support units.

[0007] Preferably, a retaining groove is provided on the support unit, a rotating rod is provided at one end of the retaining groove, the rotating rod is connected to the base frame through a rotating shaft, a slide plate is provided at the end of the retaining groove away from the rotating rod, a slideway adapted to the slide plate is provided in the middle of the retaining groove, a screw rod is screwed to one end of the slide plate through bolts, and a pad is welded at the bottom of the screw rod.

[0008] Preferably, a hydraulic cylinder is arranged at the bottom of the lifting assembly, the top of the hydraulic cylinder is cooperatively connected to a hydraulic rod, and the top of the hydraulic rod is connected to a top plate by bolts.

[0009] Preferably, a first motor is installed at the bottom of the rotating assembly, and the middle part of the top end of the first motor is movably connected to the middle part of the bottom end of the rotating plate through a rotating shaft.

[0010] Preferably, the support rod is in a cylindrical structure, and the bottom ends of the outer side walls of the plurality of arc-shaped plates are hinged to the support rod.

[0011] Preferably, a second motor is installed at the bottom of the extension and pulling assembly, and the second motor is installed at the top of the support rod. A screw rod is movably connected to the middle of the top of the second motor through a rotating shaft. The lifting plate is a cylindrical structure. A screw hole matching the screw rod is opened in the middle of the lifting plate. Several connecting plates are respectively hinged to the top of the outer walls of several arc-shaped plates.

[0012] Preferably, the lifting plate is arranged above a plurality of arc-shaped plates, a cover plate is welded on the top of the screw rod, the cover plate is in a cylindrical structure, and a photovoltaic panel is installed on the top of the cover plate.

[0013] Preferably, the method for using the publicity rack specifically comprises the following steps:

[0014] Step 1: Move the promotional stand to the designated area through the rollers at the four corners of the bottom of the base frame, adjust the angles of each screw by turning the rotating rods on the four supporting units, and adjust the position of the slide in the middle of the retaining groove and the height of the pad at the bottom of the screw, so that the pad at the bottom of each supporting unit is in contact with the ground to maintain the overall stability of the promotional stand;

[0015] Step 2: Promotional works on environmental art design are posted on each curved plate on the posting assembly. The hydraulic cylinder on the lifting assembly drives the top plate on the top of the hydraulic rod to move up and down, adjust the height of the posting assembly on the top of the rotating assembly, and start the first motor at the bottom of the rotating assembly. The first motor drives the rotating plate to rotate, adjust the angle of the promotional works on environmental art design posted on each curved plate, and provide viewing angles for people in different positions;

[0016] Step three: By turning on the second motor on the stretching assembly, the second motor drives the lifting plate on the screw rod to move up and down, and the hinged connecting plate on the lifting plate drives the tilt angle of the arc plate to adjust the tilt angle of the promotional work and reduce the impact of light.

[0017] Beneficial effects of the present invention:

[0018] 1. Move the propaganda stand to the designated area through the rollers at the four corners of the bottom of the frame, adjust the angle of each screw by turning the rotating rods on the four supporting units, and adjust the position of the slide in the middle of the retaining groove and the height of the pad at the bottom of the screw, so that the pad at the bottom of each supporting unit is in contact with the ground, which is conducive to the propaganda stand being placed in different areas for use more stably. On the one hand, it avoids the situation where the propaganda stand falls down due to adverse external factors, ensures that the propaganda stand can withstand the influence of various adverse weather conditions and environmental factors, thereby avoiding unnecessary damage to the environmental art design propaganda content, and further facilitates the safety of the propaganda stand when in use. On the other hand, it is conducive to the use of the propaganda stand in different venues, thereby ensuring that the propaganda stand has a wider range of adaptability when in use.

[0019] 2. The hydraulic cylinder on the lifting component drives the top plate on the top of the hydraulic rod to move up and down, and adjusts the height of the posting component on the top of the rotating component. On the one hand, it is convenient for the audience to watch the display content more comfortably, attracting the audience's attention, thereby increasing their participation. On the other hand, by adjusting the height of the promotional content, it is not only conducive to the audience at a distance from the promotional work to watch the promotional work, but also prevents visitors from touching the content to be promoted and causing unnecessary damage to it. Secondly, in conjunction with the first motor at the bottom of the rotating component, the first motor drives the rotating plate to rotate, and adjusts the angle of the promotional work on the environmental art design posted on each curved plate. It is not only convenient to display the content to be promoted to the surrounding audience and improve the publicity effect of the environmental art design, but also can display more promotional content in a limited space and increase the display area. At the same time, through the cooperation between the lifting component and the rotating component, it is conducive to adjustment according to different environments and needs, so as to better adapt to different venues and audiences.

[0020] 3. By turning on the second motor on the extension assembly, the second motor drives the lifting plate on the screw rod to move up and down, and the hinged connecting plate on the lifting plate drives the tilt angle of the arc plate to adjust the tilt angle of the promotional work. On the one hand, it avoids different lighting affecting the public's viewing vision, which is conducive to the audience to watch the promotional content more clearly at any time, and further helps to improve the promotion efficiency of environmental art design works. On the other hand, by adjusting the tilt angle of the promotional stand, the damage to the promotional stand in bad weather on rainy days is reduced, and the wind force and stress on the promotional stand are reduced, thereby improving the durability of the promotional stand during use, which is further conducive to increasing the service life of the promotional stand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the stabilizing component in the present invention.

[0024] Figure 3 It is a schematic structural diagram of the support unit in the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the lifting assembly in the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the rotating assembly in the present invention.

[0027] Figure 6 It is a structural schematic diagram of the posting component in the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the stretching assembly in the present invention.

[0029] In the figure: 1. Stabilizing component; 101. Base frame; 102. Roller; 103. Counterweight; 104. Support unit; 1041. Stop groove; 1042. Slide plate; 1043. Turn rod; 1044. Screw; 1045. Pad; 2. Lifting component; 201. Hydraulic cylinder; 202. Hydraulic rod; 203. Top plate; 3. Rotating component; 301. First motor; 302. Turn plate; 4. Posting component; 401. Support rod; 402. Arc plate; 5. Stretching component; 501. Second motor; 502. Screw; 503. Lifting plate; 504. Connecting plate; 505. Cover plate; 506. Photovoltaic panel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0031] See also Figure 1-Figure 7 As shown, an outdoor display and publicity rack for environmental art design includes a stabilizing component 1, a lifting component 2, a rotating component 3, a posting component 4 and a stretching component 5. The lifting component 2 is arranged at the middle of the top of the stabilizing component 1, the rotating component 3 is arranged at the top of the lifting component 2, the posting component 4 is arranged at the middle of the top of the rotating component 3, a support rod 401 is arranged at the bottom of the posting component 4, a plurality of arc plates 402 are axially evenly arranged at the top of the outer wall of the support rod 401, and publicity works about environmental art design are posted on each arc plate 402 on the posting component 4, the stretching component 5 is arranged in the middle of the support rod 401, a lifting plate 503 is arranged on the stretching component 5, and a plurality of connecting plates 504 with the same number as the arc plates 402 are evenly hinged on the outer wall of the lifting plate 503, and the lifting component 2 and the rotating component 3 cooperate with each other to facilitate adjustment according to different environments and needs, thereby facilitating better adaptation to different venues and audiences.

[0032] In an optional implementation of an embodiment of the present invention, a base frame 101 is provided on the stabilizing component 1, and rollers 102 are connected to the four corners of the bottom of the base frame 101 through a rotating shaft. The rollers 102 at the four corners of the bottom of the base frame 101 are used to move the promotional stand to a designated area. A counterweight block 103 is bolted to the middle of the top of the base frame 101 to maintain the overall stability of the bottom of the promotional stand. Support units 104 are provided at the four corners of the base frame 101.

[0033] In an optional implementation of the embodiment of the present invention, a retaining groove 1041 is provided on the support unit 104, a rotating rod 1043 is provided at one end of the retaining groove 1041, the rotating rod 1043 is connected to the base frame 101 through a rotating shaft, a slide plate 1042 is provided at one end of the retaining groove 1041 away from the rotating rod 1043, a slideway adapted to the slide plate 1042 is provided in the middle of the retaining groove 1041, a screw rod 1044 is screwed to one end of the slide plate 1042 through a bolt, a pad 1045 is welded to the bottom of the screw rod 1044, and the angles of each screw rod 1044 are adjusted by rotating the rotating rods 1043 on the four support units 104, and the slide plate 1042 is adjusted in the retaining groove 10 The position of the middle part 41 and the height of the pad 1045 at the bottom of the screw 1044 make the pad 1045 at the bottom of each supporting unit 104 contact the ground, which is conducive to the stability of the propaganda stand when placed in different areas. On the one hand, it avoids the situation that the propaganda stand falls over due to adverse external factors, ensures that the propaganda stand can withstand various adverse weather conditions and environmental factors, thereby avoiding unnecessary damage to the environmental art design propaganda content, and further helps the propaganda stand to be safer when used. On the other hand, it is conducive to the use of the propaganda stand in different venues, thereby ensuring that the propaganda stand has a wider range of adaptability when used.

[0034] In an optional implementation of an embodiment of the present invention, a hydraulic cylinder 201 is arranged at the bottom of the lifting component 2, and the top of the hydraulic cylinder 201 is cooperatively connected to the hydraulic rod 202. The top of the hydraulic rod 202 is connected with a top plate 203 by bolts. The hydraulic cylinder 201 on the lifting component 2 drives the top plate 203 on the top of the hydraulic rod 202 to move up and down, and adjusts the height of the posting component 4 on the top of the rotating component 3. On the one hand, it is convenient for the audience to watch the display content more comfortably, attracting the audience's attention and thus improving their participation. On the other hand, by adjusting the height of the promotional content, it is not only beneficial for the audience at a distance from the promotional work to watch the promotional work, but also prevents the visitors from touching the content to be promoted and causing unnecessary damage to it.

[0035] In an optional implementation of an embodiment of the present invention, a first motor 301 is installed at the bottom of the rotating component 3, and the middle part of the top end of the first motor 301 is movably connected to the middle part of the bottom end of the rotating plate 302 through a rotating shaft. When the first motor 301 at the bottom of the rotating component 3 is turned on, the first motor 301 drives the rotating plate 302 to rotate, and adjusts the angle of the promotional works about environmental art design posted on each curved plate 402. This not only makes it easy to display the content to be promoted to the surrounding audience and improve the publicity effect of the environmental art design, but also can display more promotional content in a limited space and increase the display area.

[0036] In an optional implementation of an embodiment of the present invention, the support rod 401 has a cylindrical structure, and the bottom ends of the outer walls of several curved plates 402 are hinged to the support rod 401, ensuring that the curved plates 402 are more stable when adjusting the tilt angle, which is conducive to synchronously adjusting the promotional content on the curved plates 402.

[0037] In an optional implementation of an embodiment of the present invention, a second motor 501 is installed at the bottom of the stretching component 5, and the second motor 501 is installed at the top of the support rod 401. The middle part of the top of the second motor 501 is movably connected to the screw rod 502 through a rotating shaft. The lifting plate 503 is a cylindrical structure, and a screw hole adapted to the screw rod 502 is opened in the middle of the lifting plate 503. A plurality of connecting plates 504 are respectively hinged to the top of the outer wall of a plurality of arc-shaped plates 402. By turning on the second motor 501 on the stretching component 5, the second motor 501 drives the lifting plate 503 on the screw rod 502 to move up and down. The connecting plate 504 hinged on the lifting plate 503 drives the tilt angle of the arc plate 402 to adjust the tilt angle of the promotional work. On the one hand, it avoids the influence of different lighting on the viewing vision of the public, which is conducive to the audience to watch the promotional content more clearly at any time, and further helps to improve the publicity efficiency of environmental art design works. On the other hand, by adjusting the tilt angle of the publicity rack, the damage to the publicity rack in bad weather on rainy days is reduced, and the wind force and stress on the publicity rack are reduced, thereby improving the durability of the publicity rack during use, which is further conducive to improving the service life of the publicity rack.

[0038] In an optional implementation of an embodiment of the present invention, a lifting plate 503 is arranged above a plurality of arc-shaped plates 402, a cover plate 505 is welded on the top of the screw rod 502, and the cover plate 505 is a cylindrical structure. The cover plate 505 can effectively prevent bird droppings from contaminating the promotional works, and a photovoltaic panel 506 is installed on the top of the cover plate 505 to provide electricity for the entire promotional frame, which is conducive to saving energy.

[0039] When in use, first, the propaganda rack is moved to the designated area through the rollers 102 at the four corners of the bottom of the bottom frame 101, and the angles of the screws 1044 are adjusted by rotating the rotating rods 1043 on the four supporting units 104, and the position of the slide plate 1042 in the middle of the retaining groove 1041 and the height of the pads 1045 at the bottom of the screws 1044 are adjusted, so that the pads 1045 at the bottom of each supporting unit 104 are in contact with the ground, which is conducive to the propaganda rack being placed in different areas for use more stably. On the one hand, it avoids the propaganda rack from tipping over due to adverse external factors, ensures that the propaganda rack can withstand the influence of various adverse weather conditions and environmental factors, thereby avoiding unnecessary damage to the environmental art design propaganda content, and further facilitates the higher safety of the propaganda rack when in use. On the other hand, it is conducive to the propaganda rack being suitable for use in different venues, thereby ensuring that the propaganda rack has a wider range of adaptability when in use.

[0040] Then, each arc plate 402 on the posting component 4 is posted with promotional works about environmental art design, and the hydraulic cylinder 201 on the lifting component 2 drives the top plate 203 on the top of the hydraulic rod 202 to move up and down, so as to adjust the height of the posting component 4 on the top of the rotating component 3. On the one hand, it is convenient for the audience to watch the display content more comfortably, attract the audience's attention, and thus improve their participation. On the other hand, by adjusting the height of the promotional content, it is not only conducive to the audience at a distance from the promotional work to watch the promotional work, but also prevents the visitors from touching the content to be promoted and causing unnecessary damage to it. Secondly, the first motor 301 at the bottom of the rotating component 3 is turned on, and the first motor 301 drives the rotating plate 302 to rotate, so as to adjust the angle of the promotional works about environmental art design posted on each arc plate 402, which is not only convenient for showing the content to be promoted to the audience around, and improving the publicity effect of environmental art design, but also can display more promotional content in a limited space, and increase the display area.

[0041] Finally, by turning on the second motor 501 on the extension assembly 5, the second motor 501 drives the lifting plate 503 on the screw rod 502 to move up and down, and the hinged connecting plate 504 on the lifting plate 503 drives the tilt angle of the arc plate 402 to adjust the tilt angle of the promotional work. On the one hand, it avoids different lighting effects on the public's viewing vision, which is beneficial for the audience to watch the promotional content more clearly at any time, and further helps to improve the promotion efficiency of environmental art design works. On the other hand, by adjusting the tilt angle of the promotional stand, the damage to the promotional stand in bad weather on rainy days is reduced, and the wind force and stress on the promotional stand are reduced, thereby improving the durability of the promotional stand during use.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An outdoor display and publicity stand for environmental art design, characterized in that: The invention comprises a stabilizing component (1), a lifting component (2), a rotating component (3), a posting component (4) and a stretching component (5), wherein the lifting component (2) is arranged at the middle of the top of the stabilizing component (1), the rotating component (3) is arranged at the top of the lifting component (2), the posting component (4) is arranged at the middle of the top of the rotating component (3), a supporting rod (401) is arranged at the bottom of the posting component (4), a plurality of arc-shaped plates (402) are axially evenly spaced at the top of the outer wall of the supporting rod (401), the stretching component (5) is arranged at the middle of the supporting rod (401), a lifting plate (503) is arranged on the stretching component (5), and a plurality of connecting plates (504) of the same number as the arc-shaped plates (402) are evenly spaced and hinged to the outer wall of the lifting plate (503).

2. The outdoor display and publicity stand for environmental art design according to claim 1, characterized in that: A base frame (101) is arranged on the stabilizing component (1), the four corners of the bottom of the base frame (101) are connected to rollers (102) via rotating shafts, a counterweight block (103) is connected to the middle of the top of the base frame (101) via bolts, and support units (104) are arranged at the four corners of the base frame (101).

3. The outdoor display and publicity stand for environmental art design according to claim 2, characterized in that: The support unit (104) is provided with a retaining groove (1041), a rotating rod (1043) is provided at one end of the retaining groove (1041), the rotating rod (1043) is connected to the base frame (101) via a rotating shaft, a slide plate (1042) is provided at one end of the retaining groove (1041) away from the rotating rod (1043), a slideway adapted to the slide plate (1042) is provided in the middle of the retaining groove (1041), a screw rod (1044) is screwed to one end of the slide plate (1042) via a bolt, and a cushion block (1045) is welded to the bottom of the screw rod (1044).

4. The outdoor display and publicity stand for environmental art design according to claim 1, characterized in that: A hydraulic cylinder (201) is arranged at the bottom of the lifting assembly (2), the top of the hydraulic cylinder (201) is cooperatively connected to a hydraulic rod (202), and the top of the hydraulic rod (202) is connected to a top plate (203) via bolts.

5. The outdoor display and publicity stand for environmental art design according to claim 1, characterized in that: A first motor (301) is installed at the bottom of the rotating assembly (3), and the middle part of the top end of the first motor (301) is movably connected to the middle part of the bottom end of the rotating plate (302) via a rotating shaft.

6. The outdoor display and publicity stand for environmental art design according to claim 1, characterized in that: The support rod (401) is a cylindrical structure, and the bottom ends of the outer side walls of the plurality of arc-shaped plates (402) are hinged to the support rod (401).

7. The outdoor display and publicity stand for environmental art design according to claim 1, characterized in that: A second motor (501) is installed at the bottom of the stretching assembly (5), and the second motor (501) is installed at the top of the support rod (401). The middle of the top of the second motor (501) is movably connected to a screw rod (502) through a rotating shaft. The lifting plate (503) is in a cylindrical structure. A screw hole matching the screw rod (502) is opened in the middle of the lifting plate (503). A plurality of connecting plates (504) are respectively hinged to the tops of the outer walls of the plurality of arc-shaped plates (402).

8. The outdoor display and publicity stand for environmental art design according to claim 7, characterized in that: The lifting plate (503) is arranged above a plurality of arc-shaped plates (402), a cover plate (505) is welded on the top of the screw rod (502), the cover plate (505) is in a cylindrical structure, and a photovoltaic panel (506) is installed on the top of the cover plate (505).

9. An outdoor display and publicity stand for environmental art design according to any one of claims 1 to 8, characterized in that: The method for using the publicity rack specifically includes the following steps: Step 1: Move the promotional stand to a designated area by means of the rollers (102) at the four corners of the bottom of the base frame (101), adjust the angles of the screws (1044) by rotating the rotating rods (1043) on the four supporting units (104), and adjust the position of the slide plate (1042) in the middle of the retaining groove (1041) and the height of the pads (1045) at the bottom of the screws (1044), so that the pads (1045) at the bottom of each supporting unit (104) are in contact with the ground, thereby maintaining the overall stability of the promotional stand; Step 2: Promotional works on environmental art design are posted on each curved plate (402) on the posting component (4), and the hydraulic cylinder (201) on the lifting component (2) drives the top plate (203) on the top of the hydraulic rod (202) to move up and down, adjust the height of the posting component (4) on the top of the rotating component (3), and cooperate to start the first motor (301) at the bottom of the rotating component (3), so that the first motor (301) drives the rotating plate (302) to rotate, and adjust the angle of the promotional works on environmental art design posted on each curved plate (402), so as to provide viewing angles for people in different positions; Step 3: By turning on the second motor (501) on the stretching assembly (5), the second motor (501) drives the lifting plate (503) on the screw rod (502) to move up and down, and the connecting plate (504) hinged on the lifting plate (503) drives the tilt angle of the arc plate (402) to adjust the tilt angle of the promotional work and reduce the influence of light.

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