Automatic cleaning device for projection screen

Abstract

The utility model discloses a kind of projection screen automatic cleaning device, it is related to screen cleaning technical field, including fixed frame, rotating rod is installed in the fixed frame inner chamber upper end rear side, collecting wheel is installed outside the rotating rod, projection cloth is wound outside the collecting wheel, the movable long slot is set up in the fixed frame bottom end front side, and long plate is installed in the end of projection cloth far from collecting wheel and passes through movable long slot. The utility model can automatically clean the front side and the rear side of projection cloth during the use of projection cloth, and improve the friction between cleaning end and the outside of projection cloth during cleaning process, then improve the sufficiency when cleaning the outside of projection cloth, avoid the situation that there is a dead angle when cleaning projection cloth during cleaning process, cause abnormal situation in later use process.

Description

Technical Field

[0001] This utility model relates to the field of screen cleaning technology, specifically to an automatic cleaning device for projection screens. Background Technology

[0002] Currently, during the use of projection screens, due to the long-term exposure of the projection screen to the outside, dirt will accumulate on the outside of the projection screen over time. If the outside of the projection screen is not cleaned, it will affect the normal use of the projection screen and prevent the cleaning end from cleaning itself. Over time, the cleaning end will also fail to achieve the cleaning effect. Utility Model Content

[0003] The purpose of this invention is to provide an automatic cleaning device for projection screens to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic cleaning device for a projection screen, comprising a fixed frame, a rotating rod installed on the rear side of the upper end of the inner cavity of the fixed frame, a collecting wheel installed on the outside of the rotating rod, a projection screen wrapped around the outside of the collecting wheel, and a movable long groove opened on the front side of the bottom end of the fixed frame, wherein a long plate is installed at the end of the projection screen away from the collecting wheel through the movable long groove.

[0005] The cleaning mechanism includes a cleaning brush wheel and a friction block. The cleaning brush wheel is mounted on the bottom front side of the inner cavity of the fixed frame via a bearing. The friction block is mounted on the front side of the inner cavity of the fixed frame at a position opposite to the cleaning brush wheel. The friction block has an elongated strip structure.

[0006] Preferably, a single-phase motor is installed on the right side of the fixed frame, and a rotating hole is opened on the right side of the fixed frame at the position opposite to the rotating rod. One end of the rotating rod passes through the rotating hole and is connected to the output end of the single-phase motor, and the single-phase motor is equipped with a control switch.

[0007] Preferably, a frame plate is installed on the rear side of the fixed frame, a guide wheel is installed on the front side of the top end of the inner cavity of the fixed frame, and the end of the projection cloth away from the collecting wheel passes through the outside of the guide wheel.

[0008] Preferably, the cleaning mechanism further includes a rotating wheel, a cleaning brush plate, a compression spring, a compression top rod, a fixed frame plate, and a rotating belt. The right side of both the cleaning brush wheel and the collecting wheel is equipped with a rotating wheel, and a rotating belt is fitted onto the outside of the rotating wheel. The side of the friction block away from the fixed frame is arc-shaped.

[0009] Preferably, a fixed frame plate is installed at the middle of the bottom end of the inner cavity of the fixed frame. The upper end of the fixed frame plate has a movable hole, and a squeezing rod is movably installed inside the movable hole. A cleaning brush plate is installed at the front end of the squeezing rod. The side of the cleaning brush plate away from the squeezing rod is in contact with the outside of the projection cloth. A squeezing spring is fitted onto the front end of the squeezing rod. A cleaning groove is opened on the front side of the bottom end and the front side of the middle part of the bottom end of the fixed frame. A collection frame is installed at the bottom end of the fixed frame at the position opposite to the cleaning groove. A wet sponge strip is installed on the front and rear sides of the inner cavity of the collection frame.

[0010] Preferably, the right end of the rotating rod is provided with several mounting recesses at the position opposite to the rotating wheel, and several limiting recesses are provided around the inner cavity of the rear rotating wheel. Each mounting recess has a movable stop block installed in its inner cavity via a spring-loaded hinge, and each movable stop block has an inclined structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention automatically cleans the front and back sides of the projection cloth during use, and increases the friction between the cleaning end and the outside of the projection cloth during the cleaning process. This improves the thoroughness of the cleaning of the projection cloth's exterior, avoiding blind spots during cleaning that could lead to abnormalities in later use. It also cleans the cleaning end, improving its efficiency during use and preventing dirt from accumulating on its exterior, which could reduce the efficiency of later cleaning and prevent it from failing to achieve the desired cleaning effect. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure is provided for the embodiments of this utility model;

[0014] Figure 2 This is a side horizontal sectional view of the fixed frame provided in an embodiment of the present utility model;

[0015] Figure 3 Provided for the embodiments of this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Fixed frame; 2. Projection cloth; 3. Collection frame; 4. Cleaning mechanism; 401. Cleaning brush wheel; 402. Rotating wheel; 403. Friction block; 404. Cleaning brush plate; 405. Compression spring; 406. Compression top rod; 407. Fixed frame plate; 408. Rotating belt; 5. Guide wheel; 6. Collection wheel; 7. Mounting notch; 8. Rotating rod; 9. Movable stop block; 10. Limiting notch. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a technical solution: an automatic cleaning device for projection screen, including a fixed frame 1, a rotating rod 8 installed on the rear side of the upper end of the inner cavity of the fixed frame 1, a collecting wheel 6 installed on the outside of the rotating rod 8, a projection cloth 2 wrapped around the outside of the collecting wheel 6, and a movable long groove opened on the front side of the bottom end of the fixed frame 1. A long plate is installed through the movable long groove at the end of the projection cloth 2 away from the collecting wheel 6.

[0019] The cleaning mechanism 4 includes a cleaning brush wheel 401 and a friction block 403. The cleaning brush wheel 401 is installed at the bottom front side of the inner cavity of the fixed frame 1 via a bearing. The friction block 403 is installed at the front side of the inner cavity of the fixed frame 1 at a position opposite to the cleaning brush wheel 401. The friction block 403 has a long strip structure.

[0020] A single-phase motor is installed on the right side of the fixed frame 1. A rotating hole is opened on the right side of the fixed frame 1 at the position opposite to the rotating rod 8. One end of the rotating rod 8 passes through the rotating hole and is connected to the output end of the single-phase motor. The single-phase motor is equipped with a control switch.

[0021] A frame plate is installed on the rear side of the fixed frame 1, and a guide wheel 5 is installed on the front side of the top of the inner cavity of the fixed frame 1. The end of the projection cloth 2 away from the collecting wheel 6 passes through the outside of the guide wheel 5.

[0022] The cleaning mechanism 4 also includes a rotating wheel 402, a cleaning brush plate 404, a compression spring 405, a compression top rod 406, a fixed frame plate 407, and a rotating belt 408. The cleaning brush wheel 401 and the right side of the collecting wheel 6 are both equipped with rotating wheels 402. The rotating belt 408 is fitted onto the outside of the rotating wheel 402. The friction block 403 has an arc-shaped structure on the side away from the fixed frame 1.

[0023] A fixed frame plate 407 is installed in the middle of the bottom of the inner cavity of the fixed frame 1. The upper end of the fixed frame plate 407 is provided with a movable hole, and a squeezing rod 406 is movably installed inside the movable hole. A cleaning brush plate 404 is installed at the front end of the squeezing rod 406. The side of the cleaning brush plate 404 away from the squeezing rod 406 is in contact with the outside of the projection cloth 2. A squeezing spring 405 is fitted on the front end of the squeezing rod 406. A cleaning groove is provided on the front side of the bottom end and the front side of the middle of the bottom end of the fixed frame 1. A collection frame 3 is installed at the bottom end of the fixed frame 1 at the position opposite to the cleaning groove. A wet sponge strip is installed on the front and rear sides of the inner cavity of the collection frame 3.

[0024] The specific implementation method is as follows: When the rear rotating wheel 402 rotates, the rotating belt 408 drives the front rotating wheel 402 to rotate, and drives the cleaning brush wheel 401 to rotate counterclockwise, so that the cleaning brush wheel 401 contacts and rubs against the outside of the projection cloth 2, and the dirt cleaned by friction is directly collected into the collection frame 3 through the cleaning channel. When the projection cloth 2 moves, it contacts the rear cleaning brush plate 404 with the outside of the projection cloth 2. When the projection cloth 2 moves, it rubs and cleans against the outside of the projection cloth 2, and the dirt cleaned is collected through the collection frame 3. The compression spring 405 in a compressed state increases the adhesion between the cleaning brush plate 404 and the projection cloth 2, and generates a pushing force to increase the adhesion between the cleaning brush wheel 401 and the outside of the projection cloth 2, which will increase the friction. When the cleaning brush wheel 401 rotates, it will contact and rub against the outside of the friction block 403, thus cleaning the outside of the cleaning brush wheel 401.

[0025] Several mounting recesses 7 are provided on the right side of the rotating rod 8 at the position opposite to the rotating wheel 402. Several limiting recesses 10 are provided around the inner cavity of the rear rotating wheel 402. Movable blocks 9 are installed in the inner cavity of the mounting recesses 7 through spring hinges. The movable blocks 9 are all inclined.

[0026] The specific implementation method is as follows: When the rotating rod 8 rotates clockwise, it drives the movable stop 9 to rotate. Since the movable stop 9 has an inclined structure, when the movable stop 9 contacts the inner side of the rotating wheel 402, it will move the movable stop 9 towards the inside of the mounting recess with the spring hinge as the axis, and will not drive the rotating wheel 402 to rotate. When collecting the projection cloth, the rotating rod 8 rotates counterclockwise and drives the movable stop 9 to rotate counterclockwise. When it moves to the relative position of the limiting recess 10, the movable stop 9 will be fitted into the limiting recess 10, and then drive the rear rotating wheel 402 to rotate.

[0027] Working principle: When the rear rotating wheel 402 rotates, the rotating belt 408 drives the front rotating wheel 402 to rotate, which in turn drives the cleaning brush wheel 401 to rotate counterclockwise. This causes the cleaning brush wheel 401 to come into contact with the outside of the projection cloth 2 and rub against it. The dirt removed by friction is collected in the collection frame 3 through the cleaning channel. When the projection cloth 2 moves, it comes into contact with the rear cleaning brush plate 404 and the outside of the projection cloth 2. As the projection cloth 2 moves, it rubs against the outside of the projection cloth 2 and removes the dirt, which is then collected in the collection frame 3. The compression spring 405 increases the adhesion between the cleaning brush plate 404 and the projection cloth 2 and generates a pushing force to increase the adhesion between the cleaning brush wheel 401 and the outside of the projection cloth 2, thus increasing the friction. When the cleaning brush wheel 401 rotates, it comes into contact with the outside of the friction block 403 and rubs against it, thus cleaning the outside of the cleaning brush wheel 401.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning device for projection screens, comprising a fixed frame (1), characterized in that: A rotating rod (8) is installed on the rear side of the upper end of the inner cavity of the fixed frame (1). A collecting wheel (6) is installed on the outside of the rotating rod (8). A projection cloth (2) is wrapped around the outside of the collecting wheel (6). A movable long groove is opened on the front side of the bottom end of the fixed frame (1). A long plate is installed on the end of the projection cloth (2) away from the collecting wheel (6) through the movable long groove. The cleaning mechanism (4) includes a cleaning brush wheel (401) and a friction block (403). The cleaning brush wheel (401) is installed at the bottom front side of the inner cavity of the fixed frame (1) via a bearing. The friction block (403) is installed at the front side of the inner cavity of the fixed frame (1) at a position relative to the cleaning brush wheel (401). The friction block (403) has a long strip structure.

2. The automatic cleaning device for a projection screen according to claim 1, characterized in that: A single-phase motor is installed on the right side of the fixed frame (1). A rotating hole is opened on the right side of the fixed frame (1) at the position opposite to the rotating rod (8). One end of the rotating rod (8) passes through the rotating hole and is connected to the output end of the single-phase motor. The single-phase motor is equipped with a control switch.

3. The automatic cleaning device for a projection screen according to claim 1, characterized in that: A frame plate is installed on the rear side of the fixed frame (1), and a guide wheel (5) is installed on the front side of the top of the inner cavity of the fixed frame (1). The end of the projection cloth (2) away from the collecting wheel (6) passes through the outside of the guide wheel (5).

4. The automatic cleaning device for a projection screen according to claim 1, characterized in that: The cleaning mechanism (4) also includes a rotating wheel (402), a cleaning brush plate (404), a compression spring (405), a compression top rod (406), a fixed frame plate (407), and a rotating belt (408). The right side of the cleaning brush wheel (401) and the collecting wheel (6) are both equipped with rotating wheels (402). The rotating wheel (402) is fitted with a rotating belt (408) on the outside of the rotating wheel (402). The friction block (403) on the side away from the fixed frame (1) is arc-shaped.

5. The automatic cleaning device for a projection screen according to claim 4, characterized in that: A fixed frame plate (407) is installed in the middle of the bottom of the inner cavity of the fixed frame (1). The upper end of the fixed frame plate (407) is provided with a movable hole, and a squeezing rod (406) is movably installed inside the movable hole. A cleaning brush plate (404) is installed at the front end of the squeezing rod (406). The side of the cleaning brush plate (404) away from the squeezing rod (406) is in contact with the outside of the projection cloth (2). A squeezing spring (405) is fitted on the front end of the squeezing rod (406). A cleaning groove is provided on the front side of the bottom end and the front side of the middle of the bottom end of the fixed frame (1). A collection frame (3) is installed at the bottom end of the fixed frame (1) at the position opposite to the cleaning groove. A wet sponge strip is installed on the front and rear sides of the inner cavity of the collection frame (3).

6. The automatic cleaning device for a projection screen according to claim 1, characterized in that: The right end of the rotating rod (8) is provided with several mounting recesses (7) at the relative position of the rotating wheel (402). The inner cavity of the rear rotating wheel (402) is provided with several limiting recesses (10). The inner cavity of each mounting recess (7) is provided with a movable stop (9) through a spring hinge. The movable stop (9) is inclined.

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