Electric roll-down projection screen

Abstract

The invention discloses an electric roll-down projection screen used for the technical field of projection screens. The electric roll-down projection screen comprises a housing, a reel pipe, a curtain and a reel pipe mechanism, wherein the top end of the curtain is fixedly connected with the housing; the bottom end of the curtain is rolled on the reel pipe along an anti-clockwise direction of the reel pipe; the reel pipe mechanism comprises a rope winder arranged on the housing and a pulling rope led out from the rope winder; the upper end of the pulling rope is connected with the rope winder; and the lower end of the pulling rope is rolled on the reel pipe along a clockwise direction of the reel pipe. When the curtain needs to be put down, the rope winder releases the pulling rope, the reel pipe rotationally falls under the action of gravity, the pulling rope is rolled on the reel pipe, and meanwhile, the curtain on the reel pipe is gradually unfolded; and when the curtain is folded, the rope winder tightens the pulling rope, the pulling rope is driven to rotate in a rolling manner when taken off from the reel pipe, the curtain is gradually rolled on the reel pipe under the action of rotating action force, and rolling of the curtain is finally achieved during lifting. The electric roll-down projection screen is novel in structure and can meet the large or ultra-large projection screen requirements.

Description

technical field [0001] The invention is used in the technical field of projection screens, and in particular relates to an electric roll-down projection screen. Background technique [0002] With the improvement of people's living standards, projection screens are more and more widely used among people, and there is a tendency to replace traditional TV sets. The projection screens in the prior art are all equipped with a reel in the casing, one end of the projection screen is wound on the reel, and a pull rod is fixedly installed on the other end. When in use, the projection screen is pulled out from the casing by the pull rod. After use, The projection screen is rolled up by a reel and stored in the casing. However, the above-mentioned structures are mostly used for small-sized projection screens, and are difficult to apply to large or super-large projection screens due to the limitation of the flexibility of the reel itself and the weight of the projection screen. Conte...

AI Technical Summary

Problems solved by technology

However, the above-mentioned structures are mostly used for small-sized projection screens. Due to the limitation of the flexibility of the reel itself and the weight of the projection screen, it is difficult to apply to large or super-large projection screens.

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