Electric lifting projection screen

Abstract

The utility model discloses an electric lifting projection screen, which relates to the field of projection screens and comprises a storage box, a winding shaft is connected in the storage box, a motor is connected to the front side of the storage box, the output end of the motor is connected with the front end of the winding shaft, and a projection screen is wound on the outer wall of the winding shaft. The bottom of the storage box is provided with an inlet and outlet corresponding to the projection curtain. The motor is used to drive the rolling shaft to rotate, when the rolling shaft rolls the projection curtain, the projection curtain drives the two friction rollers to rotate through friction force in the upward moving process, the friction rollers drive the first rotating shaft to rotate, the first rotating shaft drives the first belt pulley to rotate, and the first belt pulley drives the second belt pulley to rotate through the transmission belt. And the second belt pulley rotates, the second rotating shaft rotates, the second rotating shaft drives the cleaning roller to rotate, the projection curtain is cleaned in a rolling mode through bristles on the cleaning roller, the projection curtain can be conveniently cleaned, and the projection curtain cannot be abraded.

Description

Technical Field

[0001] The utility model relates to the field of projection screens, and particularly to an electric hoisting projection screen. Background Art

[0002] At present, when using a projection screen, since the projection screen is exposed to the air during use, it is easy to be contaminated with dust or hair. After being used for a period of time, it will affect the use of the projection screen. In the prior art, it is mostly cleaned manually, which is rather inconvenient. For example, a cleanable projection screen cloth proposed in the patent publication number CN220941979U. In this patent, it directly uses the mutual friction with the projection screen to clean it, which is easy to cause wear to the projection screen, thus also affecting the use of the projection screen.

[0003] Therefore, it is very necessary to invent an electric hoisting projection screen to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electric hoisting projection screen to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An electric hoisting projection screen, including a storage box, a winding shaft is connected inside the storage box, a motor is connected to the front side of the storage box, the output end of the motor is connected to the front end of the winding shaft, a projection screen cloth is wound around the outer wall of the winding shaft, an import and export corresponding to the projection screen cloth is opened at the bottom of the storage box, a counterweight block is connected to the bottom of the projection screen cloth, friction rollers and cleaning rollers are arranged on both the left and right sides of the projection screen cloth, a first rotating shaft is connected inside the friction roller, the first rotating shaft is connected to the inner wall of the storage box, a second rotating shaft is connected inside the cleaning roller, the second rotating shaft is connected to the inner wall of the storage box, a first belt pulley is connected to the outer wall of the front end of the first rotating shaft, a second belt pulley is connected to the outer wall of the front end of the second rotating shaft, and a transmission belt is connected between adjacent first belt pulley and second belt pulley.

[0006] Preferably, ash scraping boxes are arranged on both the left and right sides of the storage box, and a plurality of ash scraping openings corresponding to the cleaning rollers are opened at the top of the ash scraping boxes.

[0007] Preferably, openings corresponding to the ash scraping boxes are opened on both the left and right sides of the storage box, a pull ring is connected to the side wall of the ash scraping box, and a locking assembly corresponding to the ash scraping box is arranged inside the storage box.

[0008] Preferably, the locking assembly includes a locking block connected to the inner wall of the storage box. A cavity is formed in the locking block, and an electromagnet and an iron insertion rod are connected in the cavity. An extrusion plate is connected to the outer side of the iron insertion rod, a spring is connected to the top of the extrusion plate, and the other end of the spring is connected to the top of the cavity. A through hole corresponding to the iron insertion rod is formed in the top of the locking block, and a jack corresponding to the iron insertion rod is formed in the bottom of the ash scraping box.

[0009] Technical effects and advantages of the present utility model:

[0010] When the motor is used to drive the winding shaft to rotate and the winding shaft winds up the projection screen, during the upward movement of the projection screen, the projection screen drives two friction rollers to rotate through friction. The friction rollers drive the first rotating shaft to rotate, the first rotating shaft drives the first pulley to rotate, the first pulley drives the second pulley to rotate through the transmission belt, the second pulley drives the second rotating shaft to rotate, and the second rotating shaft drives the cleaning roller to rotate. The bristles on the cleaning roller are used to roll and clean the projection screen, which can facilitate the cleaning of the projection screen and will not cause wear to the projection screen. Description of the drawings

[0011] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0012] Figure 2 is the present utility model Figure 1 front view structure schematic diagram;

[0013] Figure 3 is the present utility model Figure 1 partial enlarged structure schematic diagram of part A;

[0014] Figure 4 is the present utility model Figure 1 partial enlarged structure schematic diagram of part B;

[0015] Figure 5 is a schematic diagram of the top view structure of the ash scraping box of the present utility model.

[0016] In the figure: 1, storage box; 2, winding shaft; 3, motor; 4, projection screen; 5, counterweight; 6, friction roller; 7, cleaning roller; 8, first rotating shaft; 9, second rotating shaft; 10, first pulley; 11, second pulley; 12, transmission belt; 13, ash scraping box; 14, pull ring; 15, locking assembly; 151, locking block; 152, electromagnet; 153, iron insertion rod; 154, extrusion plate; 155, spring. Detailed implementation manners

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] The present utility model provides an electric lifting projection screen as Figures 1-5 shown, which includes a storage box 1. A winding shaft 2 is connected inside the storage box 1. A motor 3 is connected to the front side of the storage box 1. The output end of the motor 3 is connected to the front end of the winding shaft 2. A projection screen 4 is wound around the outer wall of the winding shaft 2. An import and export corresponding to the projection screen 4 is opened at the bottom of the storage box 1. A counterweight 5 is connected to the bottom of the projection screen 4. Friction rollers 6 and cleaning rollers 7 are arranged on both the left and right sides of the projection screen 4. A first rotating shaft 8 is connected inside the friction roller 6, and the first rotating shaft 8 is connected to the inner wall of the storage box 1. A second rotating shaft 9 is connected inside the cleaning roller 7, and the second rotating shaft 9 is connected to the inner wall of the storage box 1. A first pulley 10 is connected to the outer wall of the front end of the first rotating shaft 8. A second pulley 11 is connected to the outer wall of the front end of the second rotating shaft 9. A transmission belt 12 is connected between the adjacent first pulley 10 and the second pulley 11. When the motor 3 is used to drive the winding shaft 2 to rotate and the winding shaft 2 winds up the projection screen 4, the projection screen 4 drives the two friction rollers 6 to rotate through friction during the upward movement. The friction roller 6 drives the first rotating shaft 8 to rotate, the first rotating shaft 8 drives the first pulley 10 to rotate, the first pulley 10 drives the second pulley 11 to rotate through the transmission belt 12, the second pulley 11 rotates to drive the second rotating shaft 9 to rotate, and the second rotating shaft 9 drives the cleaning roller 7 to rotate. The bristles on the cleaning roller 7 are used to roll and clean the projection screen 4, which can facilitate the cleaning of the projection screen 4 and will not cause wear to the projection screen 4.

[0019] Scraping ash boxes 13 are arranged on both the left and right sides of the storage box 1. A plurality of scraping ash openings corresponding to the cleaning rollers 7 are opened at the top of the scraping ash boxes 13. When the cleaning rollers 7 rotate, the bristles on them are stuck into the scraping ash openings at the top of the scraping ash boxes 13, and the dust and hair on the cleaning rollers 7 are scraped off into the scraping ash boxes 13, so as to keep the cleaning rollers 7 clean.

[0020] Openings corresponding to the scraping ash boxes 13 are opened on both the left and right sides of the storage box 1. A pull ring 14 is connected to the side wall of the scraping ash box 13. A locking assembly 15 corresponding to the scraping ash box 13 is arranged inside the storage box 1, which can facilitate the disassembly and assembly of the scraping ash box 13.

[0021] The locking assembly 15 includes a locking block 151 connected to the inner wall of the storage box 1. A cavity is formed in the locking block 151, and an electromagnet 152 and an iron plug 153 are connected in the cavity. An extrusion plate 154 is connected to the outer side of the iron plug 153, a spring 155 is connected to the top of the extrusion plate 154, and the other end of the spring 155 is connected to the top of the cavity. A through hole corresponding to the iron plug 153 is formed in the top of the locking block 151, and a jack corresponding to the iron plug 153 is formed in the bottom of the ash scraping box 13. By activating the electromagnet 152, the electromagnet 152 adsorbs the iron plug 153, the iron plug 153 pulls the extrusion plate 154, and the extrusion plate 154 pulls the spring 155, causing the spring 155 to deform and moving the iron plug 153 out of the jack at the bottom of the ash scraping box 13. At this time, the ash scraping box 13 can be disassembled. Conversely, the elastic force of the spring 155 can be used to drive the iron plug 153 to extend into the jack at the bottom of the ash scraping box 13 to limit the ash scraping box 13.

[0022] The working principle of the present utility model:

[0023] When the motor 3 is used to drive the winding shaft 2 to rotate and the winding shaft 2 winds up the projection screen 4, during the upward movement of the projection screen 4, the projection screen 4 drives two friction rollers 6 to rotate through friction. The friction rollers 6 drive the first rotating shaft 8 to rotate, the first rotating shaft 8 drives the first pulley 10 to rotate, the first pulley 10 drives the second pulley 11 to rotate through the transmission belt 12, the second pulley 11 drives the second rotating shaft 9 to rotate, and the second rotating shaft 9 drives the cleaning roller 7 to rotate. The bristles on the cleaning roller 7 are used to roll and clean the projection screen 4. When the cleaning roller 7 rotates, the bristles on it are stuck into the ash scraping opening at the top of the ash scraping box 13 to scrape the dust and hair on the cleaning roller 7 into the ash scraping box 13, so as to keep the cleaning roller 7 clean. By activating the electromagnet 152, the electromagnet 152 adsorbs the iron plug 153, the iron plug 153 pulls the extrusion plate 154, and the extrusion plate 154 pulls the spring 155, causing the spring 155 to deform and moving the iron plug 153 out of the jack at the bottom of the ash scraping box 13. At this time, the ash scraping box 13 can be disassembled. Conversely, the elastic force of the spring 155 can be used to drive the iron plug 153 to extend into the jack at the bottom of the ash scraping box 13 to limit the ash scraping box 13.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An electric lifting projection screen, comprising a storage box, characterized in that: A winding shaft is connected inside the storage box. A motor is connected to the front side of the storage box. The output end of the motor is connected to the front end of the winding shaft. A projection screen is wound around the outer wall of the winding shaft. An inlet and outlet corresponding to the projection screen are opened at the bottom of the storage box. A counterweight is connected to the bottom of the projection screen. Friction rollers and cleaning rollers are arranged on both the left and right sides of the projection screen. A first rotating shaft is connected inside the friction roller, and the first rotating shaft is connected to the inner wall of the storage box. A second rotating shaft is connected inside the cleaning roller, and the second rotating shaft is connected to the inner wall of the storage box. A first belt pulley is connected to the outer wall of the front end of the first rotating shaft, and a second belt pulley is connected to the outer wall of the front end of the second rotating shaft. A transmission belt is connected between adjacent first belt pulleys and second belt pulleys.

2. The electric lifting projection screen according to claim 1, characterized in that: Ash scraping boxes are arranged on both the left and right sides of the storage box. A plurality of ash scraping openings corresponding to the cleaning rollers are opened at the top of the ash scraping box.

3. The motorized lifting projection screen according to claim 2, characterized in that: Openings corresponding to the ash scraping boxes are opened on both the left and right sides of the storage box. A pull ring is connected to the side wall of the ash scraping box. A locking assembly corresponding to the ash scraping box is arranged inside the storage box.

4. The electric hoisting projection screen according to claim 3, characterized in that: The locking assembly includes a locking block connected to the inner wall of the storage box. A cavity is opened inside the locking block, and an electromagnet and an iron insertion rod are connected inside the cavity. An extrusion plate is connected to the outside of the iron insertion rod. A spring is connected to the top of the extrusion plate, and the other end of the spring is connected to the top of the cavity. A through hole corresponding to the iron insertion rod is opened at the top of the locking block, and a jack corresponding to the iron insertion rod is opened at the bottom of the ash scraping box.

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