Portable projection cloth screen device

Abstract

The invention discloses a portable projection cloth screen device which comprises first and second plate bodies, a cloth screen, spring plates and first and second chutes. Both ends of the cloth screen are respectively fixed on the first and second plate bodies. When the first and second plate bodies are closed, the cloth screen is folded between the first and second plate bodies and the bent part of the cloth screen is accommodated in a gap between the first and second plate bodies. The spring plates are abutted against the first and second plate bodies. When the first and second plate bodies are unfolded, the spring plates extend straightly so that the first and second plate bodies are fixedly expanded and the cloth screen is spread out. When the first and second plate bodies are started to be closed, the first and second plate bodies resist to the elastic forces of the spring plates to ensure the spring plates to be bent and the bent parts of the spring plates are accommodated in the gap between the first and second plate bodies. The first and second chutes are respectively fixed on the first and second plate bodies. The spring plates are positioned in the first and second chutes. Displacement spaces are provided for the spring plates by the first and second chutes.

Description

technical field [0001] The invention relates to a projection screen device, in particular to a portable projection screen device. Background technique [0002] A projection device is a display device for producing large-scale images. The imaging principle of the projection device is to convert the illumination beam generated by the light source into an image beam through a light valve, and then project the image beam onto a screen through a lens to form an image. With the advancement of projection technology and the reduction of manufacturing costs, the use of projection devices has gradually expanded from commercial use to home use. With the development trend of all kinds of electronic products towards high speed, high performance, light weight and short size, pico projector has gradually become the mainstream of personal digital market in the future. [0003] The miniature projector has a small volume, so that the user is easy to carry and can use it to project pictures ...

AI Technical Summary

Problems solved by technology

However, if the user's environment does not have a suitable projection surface for the micro-projector to utilize, the advantages and convenience of the micro-projector being available everywhere will be reduced.

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