Projector for large classroom teaching

Abstract

The utility model relates to the technical field of teaching aids, in particular to a projector for large classroom teaching, which comprises a mounting plate; the hydraulic cylinder is fixedly mounted at the bottom of the mounting plate, and the driving end of the hydraulic cylinder is vertically downward and is fixedly provided with a lifting plate; and the projector main body is rotationally mounted at the bottom of the lifting plate. According to the utility model, through cooperative use of the hydraulic cylinder and the double-shaft motor, an optimal projection picture can be presented to the projector main body during debugging, and meanwhile, when the hydraulic cylinder controls the projector main body to move downwards to be used and move upwards to be retracted, the protection plate can be automatically far away from and shield a projection head of the projector main body, so that the projection effect is improved. When the protective plate is retracted, the protective plate can clean dust at the projection lens of the protective plate by using the bristles, so that the lens of the projector main body is ensured to be clean, the definition of a projection picture is ensured, and a worker does not need to climb to a high place with the help of a ladder to frequently clean the dust.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching aid technical field especially relates to a projector for large class teaching. BACKGROUND

[0002] With the advance of the internet wave, large class is a kind of large-scale teaching activity or classroom mode, and this kind of classroom usually mainly is collective teaching. When teaching in large class, often need to use multimedia projector.

[0003] However, the teaching projector of prior art has the following shortcomings when in use:

[0004] 1. All are fixed on the roof of classroom through support, and its lens is often exposed in environment, lacks the protection function of projector lens, and dust is inevitably accumulated on its surface for a long time, thereby affecting the clarity of projection.

[0005] 2. If it is cleaned, it also needs manual help to climb to high place through ladder to clean dust frequently, thereby inconvenient to clean.

[0006] 3. It does not have the function of height and angle adjustment, so that it is inconvenient to present the best projection picture when projecting and debugging.

[0007] Therefore, we propose a projector for large class teaching to solve the above problems. CONTENT OF UTILITY MODEL

[0008] The utility model aims at solving the problems in the background art and proposes a projector for large class teaching.

[0009] In order to achieve the above object, the utility model adopts the following technical scheme:

[0010] A projector for large class teaching, comprising:

[0011] Mounting plate;

[0012] Hydraulic cylinder, fixedly installed at the bottom of the mounting plate, the driving end of the hydraulic cylinder is vertically downward and fixedly installed with lifting plate;

[0013] Projector main body, rotationally installed at the bottom of the lifting plate;

[0014] The protective assembly comprises a protective plate slidably connected to the surface of the projector body, the top of the protective plate is symmetrically provided with two connecting plates, the bottom of the other end of the two connecting plates is fixedly provided with a moving rod, the other end of the moving rod is fixedly provided with a sliding block, the top of the sliding block is slidably penetrated by a fixed rod, the upper and lower ends of the fixed rod are fixedly provided with a fixed block, and the fixed block is fixedly arranged on the surface of the projector body, and the bottom of the sliding block is connected with the corresponding fixed block through a spring.

[0015] The bottom of the mounting plate is fixedly provided with a push rod through a fixing frame, and the push rod is in contact with the top of the two connecting plates.

[0016] Preferably, the top of the projector body is symmetrically fixedly provided with two supports, and the bottom of the lifting plate is fixedly provided with a double-shaft motor for driving the two supports.

[0017] Preferably, the mounting plate and the lifting plate are jointly connected with two telescopic rods, and the telescopic rods are symmetrically arranged relative to the hydraulic cylinder.

[0018] Preferably, the distance between the two connecting plates is greater than the length of the lifting plate.

[0019] Preferably, the surface of the mounting plate is provided with four mounting holes, and the four mounting holes are respectively arranged at the four end points of the mounting plate.

[0020] Preferably, the side of the protective plate close to the projector body is provided with a plurality of bristles, and the bristles are made of cotton material.

[0021] Compared with the prior art, the projector for large-class teaching has the following advantages:

[0022] 1. When the hydraulic cylinder controls the projector body to move downward, the projector body and the protective plate move away from each other under the stretching action of the two springs until the projection head of the projector body is exposed, and when the hydraulic cylinder controls the projector body to move upward, the projector body and the protective plate move towards each other under the compression of the two springs until the protective plate covers the projection head of the projector body, thereby protecting the projector;

[0023] 2. When the double-shaft motor and the hydraulic cylinder are used in cooperation, the height and angle of the projector body can be adjusted, thereby facilitating the adjustment of the projector body to present the best projection picture;

[0024] 3. When the protective plate slides relative to the lens, the brush can be used to clean the dust on the projection lens to ensure the cleanliness of the projector lens and the clarity of the projected image, thus eliminating the need for manual cleaning by climbing a ladder to a high place.

[0025] In summary, this utility model, through the combined use of a hydraulic cylinder and a dual-axis motor, facilitates the presentation of the optimal projection image on the projector body during debugging. Simultaneously, when the hydraulic cylinder controls the projector body to move downwards for use and upwards for retraction, the protective plate automatically moves away from and blocks the projection head of the projector body, thus protecting the projector. Furthermore, during retraction, the protective plate can also use brush bristles to clean dust from the projection lens, ensuring the cleanliness of the projector lens and the clarity of the projected image, thereby eliminating the need for frequent manual dust cleaning using ladders. Attached Figure Description

[0026] Fig. 1 This is a schematic diagram of the first-view structure of a projector for large classroom teaching proposed in this utility model.

[0027] Fig. 2 This is a schematic diagram of the second-view structure of a projector for large classroom teaching proposed in this utility model;

[0028] Fig. 3 This is a schematic diagram of the structure of the projector body in use in a large classroom teaching projector proposed in this utility model.

[0029] In the diagram: 1. Mounting plate, 2. Hydraulic cylinder, 3. Lifting plate, 4. Projector body, 5. Protective plate, 6. Connecting plate, 7. Moving rod, 8. Slider, 9. Fixing rod, 10. Fixing block, 11. Spring, 12. Fixing frame, 13. Push rod, 14. Bracket, 15. Dual-axis motor, 16. Telescopic rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Reference Figs. 1-3 A projector for large classroom teaching includes:

[0032] Mounting plate 1 has four mounting holes on its surface, which are located at the four ends of the mounting plate 1, so that the mounting plate 1 can be installed on the top of the classroom by passing rivets or screws through the mounting holes.

[0033] The hydraulic cylinder 2 is fixedly installed at the bottom of the mounting plate 1, the driving end of the hydraulic cylinder 2 is vertically downward, and the lifting plate 3 is fixedly installed; two telescopic rods 16 are jointly connected between the mounting plate 1 and the lifting plate 3, and the telescopic rods 16 are symmetrically arranged about the hydraulic cylinder 2, so that the stability of the hydraulic cylinder 2 when driving the lifting plate 3 to move up and down is ensured, that is, the projector main body 4 can be more stable when moving up and down.

[0034] The projector main body 4 is rotatably installed at the bottom of the lifting plate 3, the top of the projector main body 4 is symmetrically fixedly installed with two brackets 14, the bottom of the lifting plate 3 is fixedly installed with a double-shaft motor 15 for driving the two brackets 14, and in use, the double-shaft motor 15 can be started to control the projector main body 4 to rotate, so that the projection angle of the projector main body 4 can be adjusted, and the best projection picture can be presented.

[0035] The protection assembly comprises a protection plate 5 slidably connected to the surface of the projection head of the projector main body 4, the top of the protection plate 5 is symmetrically fixedly installed with two connecting plates 6, the other end of each connecting plate 6 is fixedly installed with a moving rod 7, the other end of each moving rod 7 is fixedly installed with a sliding block 8, the top of each sliding block 8 is slidably penetrated with a fixed rod 9, the upper and lower ends of each fixed rod 9 are fixedly installed with a fixed block 10, the fixed block 10 is fixedly installed on the surface of the projector main body 4, and the bottom of each sliding block 8 is jointly connected with the corresponding fixed block 10 through a spring 11, Fig. 2 The spring 11 in the protection plate 5 is in a compressed state.

[0036] The bottom of the mounting plate 1 is fixedly installed with a push rod 13 through a fixing frame 12, and the top of each connecting plate 6 is in contact with the push rod 13.

[0037] Further, the distance between the two connecting plates 6 is greater than the length of the lifting plate 3, so that the two connecting plates 6 can be prevented from contacting the lifting plate 3 when the angle of the projector main body 4 is adjusted.

[0038] Further, a plurality of bristles are arranged on the side of the protection plate 5 close to the projector main body 4, the bristles are made of cotton material, and when the protection plate 5 slides relative to the lens of the projector main body 4 when the hydraulic cylinder 2 drives the lifting plate 3 to move upward after use of the projector main body 4, the bristles can clean the dust on the lens of the projector main body 4, so that the lens of the projector main body 4 is kept clean, and the clarity of the projection picture is ensured.

[0039] The working principle of the utility model is as follows:

[0040] In use, the hydraulic cylinder 2 is started to control the lifting plate 3 to drive the projector main body 4 to move downward to adjust the height of the projector main body 4, at this time, the two connecting plates 6 will also move downward synchronously, away from the push rod 13, and under the elastic force of the two springs 11, the two connecting plates 6 can always be in contact with the push rod 13 by pushing the two sliding blocks 8 and the moving rod 7, so that the projector main body 4 can move away from the protective plate 5 when the projector main body 4 moves downward, until the projection head of the projector main body 4 is completely out of the protection of the protective plate 5, and the teaching projection can be performed, even when the hydraulic cylinder 2 continuously controls the projector main body 4 to move downward, the two springs 11 can push the sliding blocks 8 to contact the upper fixed blocks 10 to the maximum extent, at this time, the protective plate 5 also completely eliminates the shielding of the projection head of the projector main body 4;

[0041] And when not in use, the hydraulic cylinder 2 is controlled again to drive the projector main body 4 to move upward through the lifting plate 3, until the two connecting plates 6 are in contact with the push rod 13, and under the continuous upward movement of the projector main body 4, the two springs 11 will be compressed, so that the position of the protective plate 5 is in a fixed state, at this time, the projector main body 4 moves towards the protective plate 5, until the protective plate 5 shields the projection head of the projector main body 4, thereby playing a protective role for the projector;

[0042] At the same time, when the protective plate 5 and its lens are relatively slid, the dust on the lens of the projector main body 4 can be cleaned by the bristles, so as to ensure the cleanliness of the lens of the projector main body 4 and the clarity of the projection picture.

[0043] Further, the above-mentioned fixed connection should be understood in a broad sense unless otherwise specified and limited, for example, it can be welding, or gluing, or integrally formed with other conventional means familiar to those skilled in the art.

[0044] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A projector for large classroom teaching, characterized in that, Include: Mounting plate (1); Hydraulic cylinder (2) is fixedly installed at the bottom of the mounting plate (1), the driving end of the hydraulic cylinder (2) is vertically downward and fixedly installed with lifting plate (3); Projector body (4) is rotatably installed at the bottom of the lifting plate (3); The protective assembly comprises a protective plate (5) slidably connected to the projection head surface of the projector body (4), the top of the protective plate (5) is symmetrically fixedly installed with two connecting plates (6), the other end of the bottom of the two connecting plates (6) is fixedly installed with a moving rod (7), the other end of each moving rod (7) is fixedly installed with a sliding block (8), the top of each sliding block (8) is slidably penetrated by a fixed rod (9), the upper and lower ends of each fixed rod (9) are fixedly installed with a fixed block (10), and the fixed block (10) is fixedly installed on the surface of the projector body (4), the bottom of each sliding block (8) is connected with the corresponding fixed block (10) through a spring (11); The bottom of the mounting plate (1) is fixedly installed with a push rod (13) through a fixed frame (12), and the push rod (13) is in contact with the top of the two connecting plates (6).

2. The projector for large class teaching according to claim 1, characterized in that, The top of the projector body (4) is symmetrically fixedly installed with two brackets (14), and the bottom of the lifting plate (3) is fixedly installed with a double-shaft motor (15) for driving the two brackets (14).

3. The projector for large class teaching according to claim 1, characterized in that, The mounting plate (1) and the lifting plate (3) are connected with two telescopic rods (16), and the telescopic rods (16) are symmetrically arranged about the hydraulic cylinder (2).

4. The projector for large class teaching according to claim 1, characterized in that, The distance between the two connecting plates (6) is greater than the length of the lifting plate (3).

5. The projector for large class teaching according to claim 1, characterized in that, The surface of the mounting plate (1) is provided with four mounting holes, and the four mounting holes are respectively arranged at the four end points of the mounting plate (1).

6. The projector of claim 1, wherein The side of the protective plate (5) close to the projector body (4) is provided with a plurality of bristles, and the bristles are made of cotton material.

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