CN110686143A - City wisdom large-scale advertisement display device - Google Patents
City wisdom large-scale advertisement display device Download PDFInfo
- Publication number
- CN110686143A CN110686143A CN201910904173.9A CN201910904173A CN110686143A CN 110686143 A CN110686143 A CN 110686143A CN 201910904173 A CN201910904173 A CN 201910904173A CN 110686143 A CN110686143 A CN 110686143A
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- China
- Prior art keywords
- fixed
- wheel
- lifting
- cover body
- movable base
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/046—Allowing translations adapted to upward-downward translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/048—Allowing translations adapted to forward-backward translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/08—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a vertical axis, e.g. panoramic heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/22—Undercarriages with or without wheels with approximately constant height, e.g. with constant length of column or of legs
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
Abstract
The invention discloses a large-scale urban intelligent advertisement display device, which comprises a movable base, a stand column, a placing plate, a rainproof cover body and a liquid crystal display screen, universal wheels are fixed at four corners of the bottom of the movable base, a driving cavity is arranged in the movable base, auxiliary grooves are arranged at two sides of the driving cavity, first lifting wheels are arranged in the auxiliary grooves, symmetrical upright posts are fixed on the movable base, the top end of the upright post is rotatably provided with a second lifting wheel, the side surface of the upright post is provided with a lifting groove, a guide rod is fixed in the lifting groove, lifting cylinders are sleeved on the guide rod, a placing plate is fixed between the lifting cylinders, a steering column is rotatably connected on the placing plate, the top of steering column is fixed with the rain-proof cover body, the inboard back of the rain-proof cover body is fixed with the cylinder, and the output of cylinder is fixed with the carriage release lever, the one end of carriage release lever is fixed with liquid crystal display.
Description
Technical Field
The invention discloses a large-scale urban intelligent advertisement display device, and belongs to the technical field of advertisement display equipment.
Background
Along with the acceleration of the modern industrialization process and the increase of the demands of people on material culture in life, various production and living goods are produced, so the competition of products is more and more intense. Often, the product needs to be understood and agreed upon by the consumer through extensive publicity. In order to promote products, merchants often adopt various modes for advertising, at present, the application of plane advertising equipment is very common, the plane advertising equipment comprises traditional advertising lamp box equipment and various electronic advertising devices, and is visible everywhere in markets, stations and airports. If the liquid crystal display is used for display outdoors, although the display effect is obvious, the service life of the electronic display screen can be greatly shortened due to the fact that the liquid crystal display is exposed for a long time, equipment is frequently updated, and the cost of advertising is increased; and if extreme weather such as heavy rainfall, storm, because liquid crystal display can't get effective protection of the effective waterproof antiriot device, easy damage, cause unnecessary economic loss for trade company easily, therefore, in order to save the cost and avoid the maintenance cost expenditure, the existing outdoor commonly used plane advertisement is still dull paper or plastic bill-board basically, the display screen is single, difficult to arouse people's attention, the effect of publicity is not good enough.
Disclosure of Invention
The invention aims to provide a large-scale urban intelligent advertisement display device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a city intelligent large-scale advertisement display device comprises a movable base, a column, a placing plate, a rainproof cover body and a liquid crystal display screen, universal wheels are fixed at four corners of the bottom of the movable base, a driving cavity is arranged in the movable base, auxiliary grooves are arranged at two sides of the driving cavity, first lifting wheels are arranged in the auxiliary grooves, symmetrical upright posts are fixed on the movable base, the top end of the upright post is rotatably provided with a second lifting wheel, the side surface of the upright post is provided with a lifting groove, a guide rod is fixed in the lifting groove, lifting cylinders are sleeved on the guide rod, a placing plate is fixed between the lifting cylinders, a steering column is rotatably connected on the placing plate, the top of steering column is fixed with the rain-proof cover body, the inboard back of the rain-proof cover body is fixed with the cylinder, and the output of cylinder is fixed with the carriage release lever, the one end of carriage release lever is fixed with liquid crystal display.
Preferably, the top and the bottom of the rain cover body are fixed with symmetrical guide plates, the top of the guide plate is rotated and is provided with a second guide wheel, a transparent plate is connected to the guide plate in a sliding manner, the top and the bottom of the rain cover body are provided with symmetrical first guide wheels, a steel rope is fixed to the back of the liquid crystal display screen, and the steel rope penetrates through the first guide wheel, the second guide wheel and the transparent plate to be fixedly connected.
Preferably, a connecting plate is fixed on the guide plate positioned on the lower side of the rain cover body, and the connecting plate is fixedly connected with the transparent plate through a supporting spring.
Preferably, a direction adjusting motor is fixed on the placing plate, an adjusting screw rod is fixed at the output end of the direction adjusting motor, and a thread block is arranged on the adjusting screw rod; a steering wheel is fixed on the steering column, a rotating block is fixed on the steering wheel, and the rotating block is rotatably connected with the thread block through a transmission rod.
Preferably, a lifting motor is fixed in the driving cavity, a rotating shaft is fixed at the output end of the lifting motor, an inner synchronizing wheel and an outer synchronizing wheel are fixed on the rotating shaft, rotating rods are respectively arranged on two sides of the lifting motor on the inner wall of the driving cavity in a rotating mode, the inner synchronizing wheel, the outer synchronizing wheel and a contraction wheel are respectively fixed on the rotating rods, a steel rope is wound on the contraction wheel, and the steel rope penetrates through the first lifting wheel and the second lifting wheel to be fixedly connected with the lifting cylinder.
Compared with the prior art, the invention has the beneficial effects that:
the urban intelligent large-scale advertisement display device is simple in structure and convenient to use, the display height and the display angle of the liquid crystal display screen can be freely adjusted, and meanwhile, the wind and rain prevention function can be achieved on the liquid crystal display screen in rainy days. When the display device is used, the lifting motor is started to drive the inner synchronizing wheel and the outer synchronizing wheel to rotate under the action of the synchronous belt according to needs so as to drive the contraction wheel to rotate to contract the steel rope, the steel rope drives the lifting cylinder to move along the guide rod through the first lifting wheel and the second lifting wheel so as to drive the liquid crystal display screen on the placing plate to move, and therefore the function of adjusting the height of the liquid crystal display screen is achieved, and the display height of the display device is adjusted; the direction-adjusting motor is started to drive the adjusting screw to rotate, so that the thread block moves along the adjusting screw, the thread block drives the steering wheel to rotate through the transmission rod, further drives the steering column to rotate, the display angle of the liquid crystal display screen is adjusted, and the display angle of the device is achieved; when the show meets overcast and rainy weather outside, can drive the carriage release lever motion and then drive liquid crystal display motion return rain cover internal through the cylinder, the transparent plate that is in rain cover body upside moves down along the deflector under the effect of self gravity, the transparent plate that is in rain cover body downside is closed each other until two transparent plates along the deflector upward movement under the effect of supporting spring elasticity to the realization can make liquid crystal display continue work when playing rain-proof function of preventing wind to liquid crystal display.
The portable safety device is convenient to carry and high in safety, and is simple in structure, convenient to operate and high in practicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a connection structure of the rain-proof cover and the LCD;
fig. 3 is a schematic view of a connection structure of a steering wheel and a steering motor.
In the figure: 1. and moving the base. 101. A drive chamber. 102. An auxiliary groove. 2. And (4) a column. 201. A lifting groove. 3. Placing the plate. 4. A rainproof cover body. 5. And a liquid crystal display screen. 6. A universal wheel. 7. A first lifting wheel. 8. A steering wheel. 9. A second lifting wheel. 10. A guide rod. 11. A lifting cylinder. 12. A steering column. 13. And a cylinder. 14. The rod is moved. 15. A guide plate. 16. A second guide wheel. 17. A transparent plate. 18. A first guide wheel. 19. A steel cord. 20. A connecting plate. 21. Supporting the spring. 22. And (5) adjusting the direction of the motor. 23. Adjusting the screw rod. 24. A thread block. 25. And (6) rotating the block. 26. And a transmission rod. 27. A lifting motor. 28. An inner synchronizing wheel. 29. An outer synchronizing wheel. 30. And (4) a synchronous belt. 31. And (4) a contraction wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, the present invention provides a technical solution: a city intelligent large-scale advertisement display device comprises a movable base 1, upright posts 2, a placing plate 3, a rainproof cover 4 and a liquid crystal display 5, universal wheels 6 are fixed at four corners of the bottom of the movable base 1, a driving cavity 101 is arranged in the movable base 1, auxiliary grooves 102 are formed in two sides of the driving cavity 101, first lifting wheels 7 are arranged in the auxiliary grooves 102, the movable base 1 is fixed with the symmetrical upright posts 2, a second lifting wheel 9 is rotatably arranged at the top end of each upright post 2, lifting grooves 201 are formed in the side surfaces of the upright posts 2, guide rods 10 are fixed in the lifting grooves 201, lifting cylinders 11 are sleeved on the guide rods 10, the placing plate 3 is fixed between the lifting cylinders 11, a steering column 12 is rotatably connected to the placing plate 3, the rainproof cover 4 is fixed at the top end of the steering column 12, and a cylinder 13 is fixed at the back of the inner side of the rainproof cover 4, a moving rod 14 is fixed at the output end of the cylinder 13, and a liquid crystal display screen 5 is fixed at one end of the moving rod 14.
Further, the top and the bottom of the rain cover body 4 are fixed with symmetrical guide plates 15, the top of the guide plates 15 is rotatably provided with second guide wheels 16, the guide plates 15 are connected with transparent plates 17 in a sliding mode, the top and the bottom of the rain cover body 4 are provided with symmetrical first guide wheels 18, the back of the liquid crystal display screen 4 is fixed with steel ropes 19, and the steel ropes 19 penetrate through the first guide wheels 18 and the second guide wheels 16 and the transparent plates 17 to be fixedly connected.
Furthermore, a connecting plate 20 is fixed on the guide plate 15 located at the lower side of the rain-proof cover 4, and the connecting plate 20 is fixedly connected with the transparent plate 17 through a supporting spring 21.
Further, a direction adjusting motor 22 is fixed on the placing plate 3, an adjusting screw 23 is fixed at the output end of the direction adjusting motor 22, and a thread block 24 is arranged on the adjusting screw 23; a steering wheel 8 is fixed on the steering column 12, a rotating block 25 is fixed on the steering wheel 8, and the rotating block 25 is rotatably connected with a thread block 24 through a transmission rod 26.
Further, drive chamber 101 internal fixation has elevator motor 27, and elevator motor 27's output is fixed with the pivot, is fixed with interior synchronizing wheel 28 and outer synchronizing wheel 29 in the pivot, it is provided with the bull stick to rotate respectively to lie in elevator motor 27's both sides on drive chamber 101's the inner wall, is fixed with interior synchronizing wheel 28 and outer synchronizing wheel 29 and pinch roller 30 on the bull stick respectively, the winding has steel cable 19 on the pinch roller 31, and steel cable 19 passes first lifting wheel 7 and second lifting wheel 9 and a lift section of thick bamboo 11 fixed connection, interior synchronizing wheel 28 and outer synchronizing wheel 29 pass through hold-in range 30 and connect.
The working principle is as follows: when the urban intelligent large-scale advertisement display device is used, firstly, the lifting motor 27 is started to drive the inner synchronizing wheel 28 and the outer synchronizing wheel 29 to rotate under the action of the synchronous belt 30 according to needs so as to drive the contraction wheel 31 to rotate and contract the steel rope 19, the steel rope 19 drives the lifting cylinder 11 to move along the guide rod 10 through the first lifting wheel 7 and the second lifting wheel 9 so as to drive the liquid crystal display screen 5 on the placing plate 3 to move, and therefore the function of adjusting the height of the liquid crystal display screen 5 is achieved, and the display height of the display device is adjusted; the direction-adjusting motor 22 is started to drive the adjusting screw 23 to rotate, so that the thread block 24 moves along the adjusting screw 23, the thread block 24 drives the steering wheel 8 to rotate through the transmission rod 26, the steering column 12 is driven to rotate, the display angle of the liquid crystal display screen 5 is adjusted, and the display angle of the device is achieved; when the weather of overcast and rainy is met in the outside show, can drive the 14 motion of carriage release lever and then drive liquid crystal display 5 to move back to the rain cover body 4 in through cylinder 13, the transparent plate 17 that is in the rain cover body 4 upside is along 15 downstream of deflector under the effect of self gravity, the transparent plate 17 that is in the rain cover body 4 downside is closed each other until two transparent plates 17 along 15 upward movement of deflector under the effect of supporting spring 21 elasticity, thereby the realization plays the function of rain-proof wind-proof to liquid crystal display 5 and can make liquid crystal display continue work simultaneously.
It is worth noting that: the whole device is controlled by the master control button, and the equipment matched with the control button is common equipment, so that the device belongs to the existing well-known technology, and the electrical connection relation and the specific circuit structure of the device are not repeated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a large-scale advertisement display device of city wisdom which characterized in that: comprises a movable base (1), upright columns (2), a placing plate (3), a rainproof cover body (4) and a liquid crystal display (5), universal wheels (6) are fixed at four corners of the bottom of the movable base (1), a driving cavity (101) is arranged in the movable base (1), auxiliary grooves (102) are formed in two sides of the driving cavity (101), first lifting wheels (7) are arranged in the auxiliary grooves (102), the symmetrical upright columns (2) are fixed on the movable base (1), second lifting wheels (9) are rotatably arranged at the top ends of the upright columns (2), lifting grooves (201) are formed in the side surfaces of the upright columns (2), guide rods (10) are fixed in the lifting grooves (201), lifting cylinders (11) are sleeved on the guide rods (10), the placing plate (3) is fixed between the lifting cylinders (11), and the placing plate (3) is rotatably connected with steering columns (12), the top of steering column (12) is fixed with rain-proof cover body (4), the inboard back of rain-proof cover body (4) is fixed with cylinder (13), and the output of cylinder (13) is fixed with carriage release lever (14), the one end of carriage release lever (14) is fixed with liquid crystal display (5).
2. The large-scale advertisement display device of claim 1, wherein: the top and the bottom of the rain cover body (4) are fixed with guide plate (15) of symmetry, the top of guide plate (15) is rotated and is provided with second leading wheel (16), and sliding connection has transparent plate (17) on guide plate (15), the top and the bottom of the rain cover body (4) are provided with first leading wheel (18) of symmetry, the back of liquid crystal display (4) is fixed with steel cable (19), and first leading wheel (18) and second leading wheel (16) and transparent plate (17) fixed connection are passed in steel cable (19).
3. The large-scale advertisement display device of claim 2, wherein: the guide plate (15) positioned at the lower side of the rainproof cover body (4) is fixedly provided with a connecting plate (20), and the connecting plate (20) is fixedly connected with the transparent plate (17) through a supporting spring (21).
4. The large-scale advertisement display device of claim 1, wherein: a direction adjusting motor (22) is fixed on the placing plate (3), an adjusting screw rod (23) is fixed at the output end of the direction adjusting motor (22), and a thread block (24) is arranged on the adjusting screw rod (23); a steering wheel (8) is fixed on the steering column (12), a rotating block (25) is fixed on the steering wheel (8), and the rotating block (25) is rotatably connected with a thread block (24) through a transmission rod (26).
5. The large-scale advertisement display device of claim 1, wherein: drive chamber (101) internal fixation has elevator motor (27), and the output of elevator motor (27) is fixed with the pivot, is fixed with interior synchronizing wheel (28) and outer synchronizing wheel (29) in the pivot, the both sides that lie in elevator motor (27) on the inner wall of drive chamber (101) rotate respectively and are provided with the bull stick, are fixed with interior synchronizing wheel (28) and outer synchronizing wheel (29) and shrink wheel (30) on the bull stick respectively, the wire winding has steel cable (19) on shrink wheel (31), and first lifting wheel (7) and second lifting wheel (9) and lift section of thick bamboo (11) fixed connection are passed in steel cable (19), interior synchronizing wheel (28) and outer synchronizing wheel (29) are connected through hold-in range (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904173.9A CN110686143B (en) | 2019-09-24 | 2019-09-24 | City wisdom large-scale advertisement display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904173.9A CN110686143B (en) | 2019-09-24 | 2019-09-24 | City wisdom large-scale advertisement display device |
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| Publication Number | Publication Date |
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| CN110686143A true CN110686143A (en) | 2020-01-14 |
| CN110686143B CN110686143B (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910904173.9A Active CN110686143B (en) | 2019-09-24 | 2019-09-24 | City wisdom large-scale advertisement display device |
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| Country | Link |
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| CN (1) | CN110686143B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050050A (en) * | 2020-08-28 | 2020-12-08 | 漳州理想国之旅网络信息服务有限公司 | Holographic digital new media equipment |
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| US8277645B2 (en) * | 2008-12-17 | 2012-10-02 | Jarvis Jr Ernest | Automatic retractable screen system for storm drain inlets |
| US20100176255A1 (en) * | 2009-01-15 | 2010-07-15 | Cavella Joseph C | Quick lift computer stand |
| CN206975967U (en) * | 2017-03-24 | 2018-02-06 | 北京金旗腾泰科技有限公司 | A kind of multi-functional LCDs Show board |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112050050A (en) * | 2020-08-28 | 2020-12-08 | 漳州理想国之旅网络信息服务有限公司 | Holographic digital new media equipment |
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|---|---|
| CN110686143B (en) | 2021-05-18 |
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