Projection screen for intelligent exhibition hall

Abstract

The utility model provides a projection screen for an intelligent exhibition hall. The projection screen comprises a rolling seat, a bottom plate, a controller, a curtain and a base installed at the bottom of the curtain. A motor is installed in the rolling seat, and a rotating shaft is installed at the output end of the motor and fixedly connected with the top of the curtain. A mounting plate is mounted at the top of the mounting groove; springs and metal blocks are sequentially mounted at the bottom of the mounting plate; an electromagnet is installed at the position, corresponding to the metal block, of the bottom plate, and the electromagnet is magnetically connected with the metal block. The controller is electrically connected with the motor and the electromagnet. Therefore, the curtain is less prone to shaking when drooping, the curtain is stretched all the time in the descending process and after descending is completed, and the situation that pedestrians coming and going in an exhibition hall disturb airflow and an air conditioner fresh air system causes air flow in a meeting place, so that a screen shakes back and forth, and the projection effect and the impression of an exhibition viewer are affected is prevented.

Description

Technical Field

[0001] The utility model is applicable to the field of projection screens and provides a projection screen for an intelligent exhibition hall. Background Art

[0002] Projection refers to the use of a set of light rays to project the shape of an object onto a plane, which is called "projection". The image obtained on the plane is also called "projection". Projection can be divided into orthographic projection and oblique projection. Orthographic projection means that the center line of the projection line is perpendicular to the projection plane, and the projection center line is not perpendicular to the projection plane, which is called oblique projection. Projection must have a projection screen, and a lifting projection screen is particularly important, which can save space and do not have to worry about storage space.

[0003] The lifting projection screen in the smart exhibition hall requires the demonstration screen to be placed in the center of the central hall. Ordinary TVs and display screens need to be wired and placed on a support platform, which is not smart enough and not beautiful when used in smart exhibition halls. Compared with fixed screens, ordinary lifting projection screens are made of flexible materials. Pedestrians in the exhibition hall disturb the air flow, and the air conditioning system causes air flow in the venue. All these reasons will cause the screen to shake back and forth, affecting the projection effect and greatly affecting the visitors' perception. Utility Model Content

[0004] In view of the above-mentioned defects, the purpose of the utility model is to provide a projection screen for a smart exhibition hall, in order to solve the problems raised in the background technology. The device includes a reel, a bottom plate, a controller, a screen and a base installed at the bottom of the screen; a motor is installed inside the reel, a rotating shaft is installed at the output end of the motor, and the rotating shaft is fixedly connected to the top of the screen; a mounting groove is provided at the bottom of the base, and a mounting plate is installed at the top of the mounting groove; a spring and a metal block are installed at the bottom of the mounting plate in sequence; an electromagnet is installed at a position corresponding to the metal block on the bottom plate, and the electromagnet is magnetically connected to the metal block. The controller is electrically connected to the motor and the electromagnet.

[0005] Furthermore, a guide block is installed on the top of the metal block.

[0006] Furthermore, a fixing plate is installed on the reel seat.

[0007] Furthermore, two mounting grooves are provided on the base.

[0008] Furthermore, speakers are installed on both sides of the base.

[0009] Furthermore, the surface of the curtain is coated with a reflective layer.

[0010] In summary, the projection screen for the smart exhibition hall proposed in this paper drives the rotating shaft to unwind and rewind through the motor, and uses the weight of the base to stretch the curtain downward, so that the curtain is stretched flat. When the base reaches the bottom, the stretching effect of the base on the curtain disappears, the motor stops running, the electromagnet is energized and magnetically adsorbed with the metal block, and then the controller controls the motor to rotate in the winding direction again, and the curtain is pulled upward. After the metal block and the electromagnet are magnetically adsorbed, the curtain is stretched flat again, and the soft connection of the spring seat plays a role in buffering and stretching, and at the same time, it can ensure that the curtain can avoid damage to a certain extent when it is hit by occasional visitors. As a result, the curtain is less likely to shake when it droops, and the curtain is always stretched during the descent process and after the descent is completed, preventing pedestrians in the exhibition hall from disturbing the airflow, and the air conditioning and fresh air system from causing air flow in the venue, thereby causing the screen to shake back and forth, affecting the projection effect and the visitors' perception. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the projection screen structure;

[0012] Figure 2 for Figure 1 A magnified cross-sectional view of the A-section structure;

[0013] Figure 3 for Figure 1 An enlarged cross-sectional view of the structure of part B;

[0014] In the figure: 01-ceiling; 011-keel; 1-reel seat; 11-motor; 111-fixed plate; 12-rotating shaft; 2-curtain; 21-reflective layer; 3-base; 31-mounting slot; 311-mounting plate; 312-spring; 313-metal block; 314-guide block; 4-bottom plate; 41-electromagnet; 5-sound system; 6-controller;. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0016] See also Figure 1-3The purpose of the utility model is to provide a projection screen for a smart exhibition hall, including a roll-up seat 1, a bottom plate 4, a controller 6, a screen 2 and a base 3 installed at the bottom of the screen 2; the ceiling 01 is a suspended ceiling plate installed in the smart exhibition hall, and the suspended ceiling plate is installed on the top of the smart exhibition hall through a suspended ceiling keel. The roll-up seat 1 is installed on the ceiling 01, and the roll-up seat 1 is fixedly installed at the bottom of the ceiling 01. The roll-up seat 1 is used to roll up the screen 2. The bottom of the screen 2 is fixedly connected to the base 3, and the base 3 has a certain weight. The base 3 with a certain mass can pull the screen 2 downward. The bottom plate 4 is pre-buried in the bottom plate, and its top is flush with the ground.

[0017] The motor 11 is installed inside the reel seat 1, and a rotating shaft 12 is installed at the output end of the motor 11. The rotating shaft 12 is fixedly connected to the top of the screen 2. The motor 11 is installed inside the reel seat 1 and drives the rotating shaft 12 to rotate forward and reverse. The top of the screen 2 is fixedly connected to the rotating shaft 12. When the rotating shaft 12 rotates, the screen 2 can be driven to be wound around the rotating shaft 12. This is the winding direction. The screen 2 is wound into the reel seat 1 for storage. When the motor 11 drives the rotating shaft 12 to rotate in the opposite direction of the winding direction, the screen 2 is unwound and unfolded to become a projection screen.

[0018] The bottom of the base 3 is provided with a mounting groove 31, and the top of the mounting groove 31 is installed with a mounting plate 311; specifically, the mounting groove 31 is opened at the bottom of the base 3, and the mounting plate 311 is installed at the inner top of the mounting groove 31. A spring 312 and a metal block 313 are installed at the bottom of the mounting plate 311 in sequence; the upper and lower ends of the spring 312 are fixedly connected to the mounting plate 311 and the metal block 313 respectively; the spring 312 has a tightening force, and pulls the metal block 313 to have an upward movement trend. An electromagnet 41 is installed at a position corresponding to the metal block 313 on the bottom plate 4, and the electromagnet 41 is magnetically connected to the metal block 313. The electromagnet 41 is connected to an external power supply, and has strong magnetism when powered on, and has no magnetism when not powered on. When powered on, the electromagnet 41 is magnetically connected to the metal block 313. The controller 6 is electrically connected to the motor 11 and the electromagnet 41.

[0019] In actual use, the operator uses a remote controller to remotely control the device. After the controller 6 receives the signal, the motor 11 drives the shaft 12 to rotate in the opposite direction of the winding direction, and the curtain 2 is unwound. The curtain 2 is unfolded to become a projection screen. During the process, the base 3 moves downward. Since the base 3 itself has a certain weight, the base 3 with a certain mass can pull the curtain 2 downward to make the curtain 2 flat. The base 3 continues to move downward. When it reaches the bottom, the pulling effect of the base 3 on the curtain 2 disappears, and the motor 11 stops running. At this time, the controller 6 energizes the electromagnet 41, and the magnetism of the electromagnet 41 causes the metal block 313 to be magnetically adsorbed with the electromagnet 41. Thereafter, the controller 6 controls the motor 11 to rotate in the winding direction again, and the curtain 2 is pulled upward. Since the metal block 313 is magnetically adsorbed with the electromagnet 41, the curtain 2 is flattened again. The spring 312 acts as a soft connection to buffer the stretching, preventing the motor 11 from stopping suddenly when it reverses and stretches, causing damage to the curtain 2 and the motor. When the curtain needs to be rolled up, the controller 6 controls the electromagnet 41 to be powered off. At this time, the electromagnet 41 is separated from the metal block 313, and the motor 11 drives the rotating shaft 12 to rotate in the winding direction, and the curtain 2 is wound into the winding seat 1 for storage.

[0020] Preferably, a guide block 314 is installed on the top of the metal block 313. A plurality of guide blocks 314 are provided, and the guide blocks 314 are welded on the top of the metal block 313 and fit the four walls of the installation slot 31. The guide blocks 314 are used to limit the lateral movement of the metal block 313, and limit the metal block 313 to only move up and down in the installation slot 31.

[0021] Preferably, a fixing plate 111 is installed on the reel seat 1, and a keel 011 is connected to the top of the fixing plate 111 through bolts. Specifically, the keel 011 is installed on the top of the ceiling 01, and the bolts pass through the fixing plate 111 and the ceiling 01 to be threadedly connected to the keel 011.

[0022] Preferably, two mounting grooves 31 are provided on the base 3. The two mounting grooves 31 are symmetrically arranged at the bottom of the base 3, and this mode makes the force more uniform when the curtain 2 is stretched.

[0023] Preferably, speakers 5 are installed on both sides of the base 3. The speakers 5 can be used as a sound source for the projection screen.

[0024] Preferably, the surface of the curtain 2 is coated with a reflective layer 21. The reflective layer 21 can enhance the visual effect, and the reflective layer 21 can reflect part of the light to make the picture clearer, and also increase the visual contrast and layering of the picture.

[0025] In summary, the projection screen for the smart exhibition hall proposed in this article drives the rotating shaft 12 to unwind and rewind through the motor 11, and uses the weight of the base 3 to pull the curtain 2 downward, so that the curtain 2 is stretched flat. When the base 3 reaches the bottom, the pulling effect of the base 3 on the curtain 2 disappears, the motor 11 stops running, the electromagnet 41 is energized and magnetically adsorbed with the metal block 313, and then the controller 6 controls the motor 11 to rotate in the winding direction again, and the curtain 2 is pulled upward. Since the metal block 313 is magnetically adsorbed with the electromagnet 41, the curtain 2 is stretched flat again, and the spring 312 seat soft connection plays a role of buffering and stretching, and at the same time, it can ensure that the curtain 2 can avoid damage to a certain extent when it is hit by occasional visitors to the exhibition. As a result, the curtain 2 is less likely to shake when it is drooping, and the curtain 2 is always stretched during and after the descent, preventing pedestrians in the exhibition hall from disturbing the air flow, and the air conditioning system from causing air flow in the venue, which would cause the screen to shake back and forth, affecting the projection effect and the viewing experience of the visitors.

[0026] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A projection screen for a smart exhibition hall, characterized in that: It comprises a reel seat (1), a bottom plate (4), a controller (6), a curtain (2), and a base (3) installed at the bottom of the curtain (2); A motor (11) is installed inside the reel seat (1), a rotating shaft (12) is installed at the output end of the motor (11), and the rotating shaft (12) is fixedly connected to the top of the curtain (2); The base (3) is provided with a mounting groove (31) at the bottom, and a mounting plate (311) is mounted on the top of the mounting groove (31); a spring (312) and a metal block (313) are mounted in sequence at the bottom of the mounting plate (311); an electromagnet (41) is mounted on the bottom plate (4) at a position corresponding to the metal block (313), the electromagnet (41) is magnetically connected to the metal block (313), and the controller (6) is electrically connected to the motor (11) and the electromagnet (41).

2. The projection screen for the smart exhibition hall according to claim 1, characterized in that: A guide block (314) is installed on the top of the metal block (313).

3. The projection screen for the smart exhibition hall according to claim 1, characterized in that: A fixing plate (111) is mounted on the reel seat (1).

4. The projection screen for the smart exhibition hall according to claim 1, characterized in that: Two mounting grooves (31) are provided on the base (3).

5. The projection screen for the smart exhibition hall according to claim 1, characterized in that: Speakers (5) are installed on both sides of the base (3).

6. The projection screen for the smart exhibition hall according to claim 1, characterized in that: The surface of the curtain (2) is coated with a reflective layer (21).

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