A projection device for outdoor teaching

A projection device and a horizontal technology, which can be used in educational appliances, teaching aids for electric operation, instruments, etc., can solve problems such as strong light and unclear viewing

Active Publication Date: 2021-11-05
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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  • A projection device for outdoor teaching
  • A projection device for outdoor teaching
  • A 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 parallel side guards 7 are slidingly connected respectively, and projection equipment is connected between the two side guards 7 rotatably, and the fronts of the two side guards 7 are respectively fixed with support slats parallel to each other in the vertical state 22. The tops of the two supporting slats 22 are respectively fixed with mutually symmetric...

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, especially a projection device for outdoor teaching. Aiming at the problem that the projection device for outdoor use in the prior art is unclear due to strong light, the following proposals are proposed, including the overall presentation The base of a horizontal rectangular tubular structure, the four corners of the lower surface of the base are provided with extendable rollers, the four corners of the upper surface of the base are fixed with guide posts, and the top ends of the four guide posts slide respectively Two parallel side guard plates are connected, and a projecting device is rotatably connected between the two side guard plates. When the present invention is in use, when the device is projected outdoors and encounters strong light weather, the fan-shaped blocking cloths on both sides can be pulled out only by pulling out the rotating bars on both sides, and sunlight can be placed on both sides of the screen. Blocking, and then slide the two sliding blocks on the top forward, and then the sunshade cloth wound on the top and rolled on the cloth rod can be pulled out from the top to shield the top from the sun.

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 Patents(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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