Indoor adjustable full-color LED display screen

Abstract

The invention relates to an indoor adjustable full-color LED display screen which comprises a display screen body and a fixing support fixed to the rear portion of the display screen body, and a cleaning assembly used for cleaning the display screen body is arranged in an inner cavity between the fixing support and the display screen body; the invention relates to the technical field of full-color LED display screens. According to the indoor adjustable full-color LED display screen, through the design of the double rails and the arc sections, the cleaning assembly is completely contained in the back of the display screen in the non-working state, the appearance is kept clean, the collision risk caused by exposure of mechanical parts is avoided, and the containing space is reduced by 60% or above compared with a traditional external design.

Description

Technical Field

[0001] The present invention relates to the technical field of full-color LED display screens, and specifically to an indoor adjustable full-color LED display screen. Background Art

[0002] With the popular application of indoor full-color LED display screens, the problem of surface cleaning and maintenance has become increasingly prominent. The traditional cleaning method of LED display screens mainly relies on manual wiping, and there are the following technical defects: 1) For display screens installed at high altitudes, scaffolding needs to be erected for cleaning, with high operation risks and low efficiency; 2) Frequent wiping is likely to cause damage to the coating layer on the screen surface, especially hard dust particles are likely to produce scratches during the wiping process; 3) Residual fiber debris during the cleaning process is likely to block the heat dissipation holes of the display screen, affecting the heat dissipation performance; 4) Most fixed cleaning devices protrude from the surface of the display screen, damaging the overall aesthetics. Although the prior art has proposed a rail-type cleaning mechanism, there are still problems such as non-adjustable cleaning intensity, insufficient coverage of the cleaning path, and inconvenient storage of cleaning components. In addition, the traditional cleaning device has a defect of single function in the coordinated treatment of dust removal and heat dissipation, and there is an urgent need for a multi-functional integrated solution that integrates automatic cleaning, intelligent dust removal, and auxiliary heat dissipation. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an indoor adjustable full-color LED display screen, which solves the problems mentioned above.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An indoor adjustable full-color LED display screen includes a display screen body and a fixed bracket fixed behind the display screen body. The fixed bracket is fixed above the wall through a universal rotary bracket with an angle locking mechanism. A telescopic hydraulic push rod is provided between the universal rotary bracket and the fixed bracket for adjusting the pitching angle of the fixed bracket. An inner cavity between the fixed bracket and the display screen body is provided with a cleaning assembly for cleaning the display screen body;

[0005] The cleaning assembly includes two symmetrically arranged upper and lower rails fixed behind the display screen body. The rails are composed of a straight section in the middle and arc sections at both ends to form a complete track. The surface of the rails is slidably connected with a moving group that travels through electric walking wheels. One side of each of the two upper and lower moving groups is connected through a connection structure with a cleaning structure for cleaning the surface of the display screen body;

[0006] The connecting structure includes a fixed rod fixed to one side of the moving group. The other end of the fixed rod is sleeved with a movable rod in a sliding manner. A return spring fixedly connected to the end of the fixed rod is fixedly connected inside the inner cavity of the movable rod. A guide rod is fixedly connected to the surface of the fixed rod. Inside the inner cavity of the fixed bracket, a guide frame located above the display body and the track is fixedly connected through a connecting rod. The movement trajectories of the guide frame and the guide rod coincide on the arc section. When not in use, the moving group moves to the end on the arc section, driving the cleaning component to hide behind the display body. When in need of use, the moving group is driven to move on the arc section, driving the cleaning component to rotate. At this time, the connecting mechanism rotates to the side of the display body. At this time, the guide rod on the surface of the fixed rod abuts against the guide frame, and extends outwards when driven by the moving group, then drives the straightening plate to move over from the outside of the display body, and then continues to move to the straight section. At this time, the guide rod and the guide frame lose contact. The fixed rod is pulled back by the return spring, driving the first wiping pad and the second wiping pad on the surface of the straightening plate to abut against the surface of the display body, and wiping the surface during movement. After wiping, it moves to the other side and retracts for hiding.

[0007] As a further solution of the present invention: A groove adapted to the movement trajectories of the connecting mechanism and the cleaning structure at the arc section is provided inside the inner cavity of the fixed bracket, which can be effectively hidden when not in use usually. The structure is simple, and only a small amount of driving mechanism is required to drive and effectively clean the display body.

[0008] As a further solution of the present invention: The cleaning mechanism includes a straightening plate fixed to the side of the movable rod. A first wiping pad is fixedly connected to one side of the straightening plate. Symmetric second wiping pads are fixedly connected to the surface of the first wiping pad. The first wiping pad and the second wiping pad are driven to move left and right by the straightening plate. First, a simple wiping is performed by the first wiping pad to wipe off the floating dust on the surface, and then a careful wiping is performed by the second wiping pad to wipe off the remaining dust. The secondary wiping is carried out step by step, which can ensure effective cleaning of the surface dirt and dust, and can prevent the surface glass of the display body from being scratched by the dust due to excessive force during the first wiping.

[0009] As a further solution of the present invention: Guide inclined surfaces are provided on the sides of the first wiping pad and the second wiping pad. By contacting the display body through the guide inclined surfaces, the transition can be smoother, preventing jamming caused by direct contact.

[0010] As a further solution of the present invention: An air blowing hole is provided in the middle of the first wiping pad. An air pump fixedly connected to the back of the display body and communicated with the air blowing hole through a communication pipeline.

[0011] As a further solution of the present invention: the air outlet of the air pump is connected to a blowing hopper facing the heat dissipation mesh holes of the display body, and the air pump can blow air on the surface of the display body to blow away dust and assist the display body in heat dissipation at the same time.

[0012] As a further solution of the present invention: when the movable rod is in a normal state, the distance from the moving group to the cleaning mechanism is the same as the width of the display body, and the cleaning mechanism can effectively clean the display body.

[0013] The present invention has the following beneficial effects compared with the prior art:

[0014] Intelligent hidden cleaning system: Through the double-track and arc segment design, the cleaning component is completely stored on the back of the display screen when not in use, which not only keeps the appearance clean, but also avoids the collision risk caused by the exposure of mechanical components. The storage space is reduced by more than 60% compared with the traditional external design.

[0015] Hierarchical cleaning protection mechanism: Adopt the composite structure of the first wiping pad (polyurethane sponge) and the second wiping pad (ultra-fine fiber cloth), and cooperate with hierarchical pressure control (initial contact pressure < 0.5N / cm 2 , working pressure 1.2 - 1.5N / cm 2 ), to achieve a progressive cleaning process of "pre-dust removal - deep cleaning". The cleaning efficiency is increased by 40% compared with the single-layer wiping structure, and the surface scratch incidence rate is reduced by 80%.

[0016] Dynamic path compensation system: Through the synergistic effect of the guide rod - guide frame linkage mechanism and the return spring, the spatial attitude adjustment of the cleaning component is automatically completed at the arc segment of the track, ensuring that the wiping pad maintains the best contact angle (65 ± 5°) with the screen surface, and the path following accuracy can reach ±0.2mm.

[0017] Pneumatic assisted cleaning technology: The integrated air pump system forms a laminar air curtain through the air blowing holes (hole diameter 0.3 - 0.5mm, air flow velocity 8 - 12m / s), strips the surface dust before wiping, and cooperates with the directional air supply of the heat dissipation mesh holes, so that the heat dissipation efficiency is increased by 25%, and at the same time, the secondary pollution during the wiping process is reduced.

[0018] Adaptive structure design: The sliding socket structure of the movable rod and the fixed rod (fit tolerance H7 / g6) allows a position compensation of ±5mm, ensuring that a stable contact pressure can still be maintained under different thermal expansion conditions (temperature change ΔT = ±15°C). BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a top view of the structure of the present invention;

[0021] Figure 3 Schematic structural diagram of the movement state of the cleaning component of the present invention on the arc section;

[0022] Figure 4 Side view of the structure of the present invention;

[0023] Figure 5 Schematic structural diagram of the straightening plate of the present invention.

[0024] In the figure: 1, display screen body; 2, fixed bracket; 3, straight section; 4, arc section; 5, moving group; 6, fixed rod; 7, movable rod; 8, straightening plate; 9, guide rod; 10, connecting rod; 11, guide frame; 12, communication pipe; 13, air pump; 14, first wiping pad; 15, air blowing hole; 16, second wiping pad; 17, guide inclined plane. Detailed implementation manners

[0025] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the accompanying drawings and preferred embodiments to detail the specific implementation manners, structures, features and their effects of the present invention as follows.

[0026] Please refer to Figures 1-5 , the present invention provides a technical solution: an indoor adjustable full-color LED display screen, including a display screen body 1 and a fixed bracket 2 fixed behind the display screen body 1. The fixed bracket 2 is fixed above the wall through a universal rotating bracket with an angle locking mechanism. A telescopic hydraulic push rod is provided between the universal rotating bracket and the fixed bracket 2 for adjusting the pitching angle of the fixed bracket 2. The universal rotating bracket includes a horizontal rotating shaft hinged to the wall fixed end and a vertical rotating shaft hinged to the fixed bracket 2. A cleaning component for cleaning the display screen body 1 is arranged in the inner cavity between the fixed bracket 2 and the display screen body 1;

[0027] The cleaning component includes two symmetrically arranged upper and lower tracks fixed behind the display screen body 1. The tracks are composed of a middle straight section 3 and arc sections 4 at both ends to form a complete track. The surface of the tracks is slidably connected with a moving group 5 that travels through electric driving wheels. One side of the two upper and lower moving groups 5 is connected with a cleaning structure for cleaning the surface of the display screen body 1 through a connecting structure;

[0028] The connecting structure includes a fixed rod 6 fixed to one side of the moving group 5. The other end of the fixed rod 6 is slidably sleeved with a movable rod 7. A return spring fixedly connected to the end of the fixed rod 6 is fixedly connected inside the inner cavity of the movable rod 7. A guide rod 9 is fixedly connected to the surface of the fixed rod 6. Inside the inner cavity of the fixed bracket 2, a guide frame 11 located above the display body 1 and the track is fixedly connected through a connecting rod 10. The movement trajectories of the guide frame 11 and the guide rod 9 coincide on the arc section 4. When not in use, the moving group 5 moves to the end on the arc section 4, driving the cleaning component to hide behind the display body 1. When in need of use, the moving group 5 is driven to move on the arc section 4, driving the cleaning component to rotate. At this time, the connecting mechanism rotates to the side of the display body 1. At this time, the guide rod 9 on the surface of the fixed rod 6 abuts against the guide frame 11 and extends outwards when driven by the moving group 5. Then, it drives the straightening plate 8 to move over from the outside of the display body 1 and then continues to move to the straight section 3. At this time, the guide rod 9 loses contact with the guide frame 11. The fixed rod 6 is pulled back by the return spring, driving the first wiping pad 14 and the second wiping pad 16 on the surface of the straightening plate 8 to abut against the surface of the display body 1, and wiping the surface during the movement. After wiping, it moves to the other side and retracts for hiding.

[0029] Inside the inner cavity of the fixed bracket 2, there is a groove adapted to the movement trajectories of the connecting mechanism and the cleaning structure at the arc section 4, which can be effectively hidden when not in use usually. The structure is simple, and only a small amount of driving mechanism is needed to drive to effectively clean the display body 1.

[0030] The cleaning mechanism includes a straightening plate 8 fixed to the side of the movable rod 7. One side of the straightening plate 8 is fixedly connected with a first wiping pad 14. The surface of the first wiping pad 14 is fixedly connected with symmetric second wiping pads 16 on the left and right. The first wiping pad 14 and the second wiping pads 16 are driven to move left and right by the straightening plate 8. First, a simple wiping is carried out by the first wiping pad 14 to wipe off the floating dust on the surface, and then a careful wiping is carried out by the second wiping pads 16 to wipe off the remaining dust. The secondary wiping is carried out step by step, which can ensure effective cleaning of the surface dirt and dust, and can prevent scratches on the surface glass of the display body 1 caused by excessive force during the first wiping.

[0031] Guide inclined surfaces 17 are provided on the sides of the first wiping pad 14 and the second wiping pads 16. By contacting the display body 1 through the guide inclined surfaces 17, the transition can be smoother and the direct contact can be prevented from causing jams.

[0032] An air blowing hole 15 is provided in the middle of the first wiping pad 14. An air pump 13 fixedly connected to the back of the display body 1 is communicated with the air blowing hole 15 through a connecting pipe 12.

[0033] The air outlet of the air pump 13 is connected to a blowing hopper facing the heat dissipation mesh holes of the display body 1. By operating the air pump 13, it is possible to blow air onto the surface of the display body 1, blowing away dust while assisting in the heat dissipation of the display body 1.

[0034] When the movable rod 7 is in its normal state, the distance from the moving group 5 to the cleaning mechanism is the same as the width of the display body 1, and the display body 1 can be effectively cleaned by the cleaning mechanism.

[0035] The working cycle of this cleaning system is divided into four stages:

[0036] Startup and deployment stage: When the cleaning program starts, the electric drive wheels (rated power 50W, adjustable speed 0 - 30rpm) drive the moving group to move along the arc section of the track. When passing through the arc section at the end of the track, the guide rod mechanically couples with the guide frame, pushing the movable rod to extend outward against the resistance of the return spring (pre-tightening force 10N), causing the straightening plate to carry the wiping assembly to complete a 90° spatial pose transformation and transfer from the storage position to the working position.

[0037] Main cleaning stage: After the moving group enters the straight section of the track, the guide rod is released from the constraint of the guide frame, and the return spring (elastic coefficient 8N / mm) pulls the movable rod back to the working position, causing the first wiping pad to contact the screen surface with a preset pressure. Driven by the drive wheels, the cleaning assembly moves horizontally at a speed of 0.2 - 0.5m / s. During this period:

[0038] The air pump (flow rate 15L / min) supplies air to the air blowing holes through the connecting pipe, forming an air flow at a 45° angle to the moving direction to pre-blow the surface particles

[0039] The first wiping pad completes primary cleaning (removing particles with a particle size > 50μm)

[0040] The second wiping pad performs fine wiping (removing residual particles of 5 - 50μm)

[0041] Heat dissipation assistance stage: During the cleaning process, the air pump diverts a part of the air flow (about 30%) and blows it towards the heat dissipation mesh holes through the blowing hopper in a laminar flow manner (Reynolds number < 2300) to form forced convection heat dissipation, while preventing cleaning fibers from entering the heat dissipation channel.

[0042] Reset and storage stage: After completing a one-way cleaning, the moving group enters the arc section on the opposite side. The guide rod interacts with the guide frame again, gradually releasing the extension amount of the movable rod, causing the cleaning assembly to smoothly transfer to the storage position. The entire movement process is monitored in real-time by an encoder (resolution 0.1°) to ensure the terminal positioning accuracy of ±1mm.

[0043] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An indoor adjustable full-color LED display screen, comprising a display screen body (1) and a fixed bracket (2) fixed to the rear of the display screen body (1), wherein the fixed bracket (2) is fixed to the top of a wall through a universal rotating bracket with an angle locking mechanism, and a retractable hydraulic push rod is provided between the universal rotating bracket and the fixed bracket (2) for adjusting the pitch angle of the fixed bracket (2), characterized in that: The inner cavity between the fixing bracket (2) and the display screen body (1) is provided with a cleaning component for cleaning the display screen body (1); The cleaning component comprises two symmetrically arranged upper and lower tracks fixed behind a display screen body (1), the track being composed of a straight line segment (3) in the middle and arc segments (4) at both ends to form a complete track, a moving group (5) that moves via electric running wheels being slidably connected to the surface of the track, and one side of the two upper and lower moving groups (5) being connected to a cleaning structure for cleaning the surface of the display screen body (1) via a connecting structure; The connection structure comprises a fixed rod (6) fixed to one side of the moving group (5); a movable rod (7) is slidably sleeved on the other end of the fixed rod (6); a reset spring fixedly connected to the end of the fixed rod (6) is fixedly connected to the inner cavity of the movable rod (7); a guide rod (9) is fixedly connected to the surface of the fixed rod (6); the inner cavity of the fixed bracket (2) is fixedly connected to a guide frame (11) located above the display screen body (1) and the track through a connecting rod (10); and the movement trajectory of the guide frame (11) and the guide rod (9) on the arc segment (4) coincides.

2. An indoor adjustable full-color LED display according to claim 1, characterized in that: The inner cavity of the fixed bracket (2) is provided with a groove adapted to the movement trajectory of the connecting mechanism and the cleaning structure at the circular arc section (4).

3. The indoor adjustable full-color LED display according to claim 1, characterized in that: The cleaning mechanism comprises a straightening plate (8) fixed on the side of a movable rod (7), a first wiping pad (14) is fixedly connected to one side of the straightening plate (8), and a left-right symmetrical second wiping pad (16) is fixedly connected to the surface of the first wiping pad (14).

4. The indoor adjustable full-color LED display according to claim 3, characterized in that: The first wiping pad (14) and the second wiping pad (16) are both provided with guide slopes (17) on their side edges.

5. The indoor adjustable full-color LED display according to claim 3, characterized in that: A blowing hole (15) is provided in the middle of the first wiping pad (14), and an air pump (13) connected to the blowing hole (15) via a connecting pipe (12) is fixedly connected to the back of the display screen body (1).

6. An indoor adjustable full-color LED display according to claim 5, characterized in that: The air outlet of the air pump (13) is connected to an air blowing hopper directed toward the heat dissipation mesh holes of the display screen body (1).

7. The indoor adjustable full-color LED display according to claim 1, characterized in that: When the movable rod (7) is in a normal state, the distance between the movable group (5) and the cleaning mechanism is the same as the width of the display screen body (1).

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