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Projection device for outdoor teaching

A projection device, horizontal technology, applied in educational appliances, electrically operated teaching aids, instruments, etc., can solve the problems of unclear viewing and strong light, etc.

Active Publication Date: 2021-09-17
深圳市志承远大科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a projection device for outdoor teaching in order to overcome the problem of unclear viewing due to strong light in the projection device used outdoors in the prior art

Method used

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  • Projection device for outdoor teaching
  • Projection device for outdoor teaching
  • Projection device for outdoor teaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] refer to Figure 1-Figure 5, a projection device for outdoor teaching, including a base 1 with a rectangular tubular structure that is placed horizontally as a whole. If the weight of the base 1 is not enough, a counterweight can be arranged on its lower surface to improve its stability. The base 1 The four corners of the lower surface of the bottom surface are provided with rollers that can extend diagonally in reverse, which increases the load-bearing area and improves the stability effect. The four corners of the upper surface of the base 1 are fixed with guide posts 4, and the top ends of the four guide posts 4 Two mutually parallel side guard plates 7 are slidably connected respectively, and a projection device is rotatably connected between the two side guard plates 7 , and the fronts of the two side guard plates 7 are respectively fixed with supporting slats parallel to each other in the vertical state. 22. The tops of the two supporting slats 22 are respectively...

Embodiment 2

[0034] refer to Figure 6-Figure 8 , a projection device for outdoor teaching. Compared with Embodiment 1, this embodiment also includes a round hole in the middle of the upper surface of the base 1, and an adjusting threaded pipe 3 is rotatably connected to the round hole. The inner wall of the bottom of the base 1 A limit snap ring 25 adapted to the diameter of the adjustment threaded pipe 3 is fixed, and the outer wall of the adjustment thread pipe 3 is fixed on the upper surface of the base 1 and the lower surface of the limit snap ring 25 respectively with an annular retaining ring 2 and a retaining ring two. 26. The peripheral outer wall of the adjustment threaded pipe 3 is fixed with equidistantly distributed toggle rods 301 close to the top, the middle of the adjustment threaded pipe 3 is screwed with the limit ejector rod 5, and the lower surface of the side guard plate 7 is provided with the guide column 4. Adapted jack, the side of the side guard plate 7 is provided...

Embodiment 3

[0039] refer to Figure 9-Figure 10 , a projection device for outdoor teaching. Compared with Embodiment 1, on the basis of Embodiment 1, the top of the rotating bar 21 has a slot, and the slot is slidably connected with an extension push rod 15, and the extension push rod 15 is made of permanent magnet material, and there is a notch 1501 on the side of the extension rod 15 away from the curved screen 6, the inner wall of the notch 1501 is fixed with a locking block 1503, and the end of the limit groove 18 far away from the support slat 22 is fixed with the notch. 1501 compatible gear rod 19, the top of the extension push rod 15 is provided with a top ball 1502, and a compression spring is arranged between the bottom end of the extension push rod 15 and the groove bottom of the slot, so that the rotation bar 21 can be ensured when in use. Not going off the rails.

[0040] Wherein, the sliding block 16 comprises an upper block and a lower block slidably connected to the bottom...

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Abstract

The invention belongs to the technical field of teaching equipment, particularly relates to a projection device for outdoor teaching, and aims to solve the problem that an outdoor projection device in the prior art is unclear in watching due to strong light, and provides the following scheme: the projection device comprises a base which is integrally transversely arranged and is of a rectangular tubular structure; rollers capable of extending are arranged at four corners of the lower surface of the base, guide columns are fixed at four corners of the upper surface of the base, two parallel side protection plates are slidably connected to the top ends of the four guide columns respectively, and a projection device is rotatably connected between the two side protection plates. When the device is used and the device encounters strong light weather during outdoor projection, only rotating strips on the two sides need to be pulled out, fan-shaped blocking cloth on the two sides can be pulled out, sunlight shielding is conducted on the two sides of a screen, then two sliding clamping blocks at the top end are slid forwards, sunshade cloth with the top end wound on a cloth winding rod can be drawn out from the top end, and sunlight shielding is conducted on the top end.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to a projection device for outdoor teaching. Background technique [0002] The teaching projection device is the utensil used for writing and demonstration in the education industry. The common teaching board is the board placed in the classroom or meeting room. The content is written with chalk or water-based pen, which plays the role of explaining and demonstrating. It is used as an indoor When the indoor light is adjustable, there is no need to consider the problem of shading reflection. [0003] In the prior art, the structure and function of the outdoor teaching boards are relatively simple. Generally, the indoor teaching projection device is installed with a wheel that is easy to move, and then pushed to the outside to become an outdoor teaching projection device, or a separate teaching projection device is used. The screen equipment cannot be moved, and because th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B5/02
CPCG09B5/02
Inventor 林泽丹
Owner 深圳市志承远大科技有限公司
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