Ground lifting projection screen

A technology of projection screen and floor, which is applied in the direction of optics, instruments, projection devices, etc., can solve the problems of large structure volume, high requirements for support material strength, heavy weight, etc., and achieve the effect of small volume, simple structure and convenient use

Inactive Publication Date: 2012-05-16
崔定楠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage is that because of the use of strong gas springs, the strengt...

Method used

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  • Ground lifting projection screen
  • Ground lifting projection screen
  • Ground lifting projection screen

Examples

Experimental program
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Embodiment Construction

[0027] Such as figure 1 As shown, the floor-mounted projection screen includes a pull rod 10, a foldable bracket 20, a driving force module 30, a limit module 40, a T-shaped steering gear box 50, a synchronization lever 60, a rotating tube 70, a housing 80, a torsion spring 90, Bearing 100, curtain 110.

[0028] There is a rotating tube 70 in the casing 80, and a synchronous rod 60 is arranged in the rotating tube 70. The rotating tube 70 is coaxially supported on the synchronization rod 60 through the bearings 100 at both ends.

[0029] The two ends of the casing 80 are symmetrically installed with the gear box 50 . Both ends of the synchronization rod 60 are fixedly connected to the X axes of the two gearboxes 50 , so that the X axes of the two gearboxes 50 are synchronized.

[0030] A torsion spring 90 of a certain length is wound around the synchronization rod 60 . One end of the torsion spring 90 is fixed on the synchronization rod 60 , and the other end is fixed on t...

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PUM

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Abstract

The invention discloses a ground lifting projection screen, which has the characteristics of simple structure, small volume and the like. The upper end of a curtain is taken up by a pull rod, and the lower end of the curtain is taken up with a winding pipe; a synchronous rod passes through the winding pipe, and the winding pipe is supported on the synchronous rod via a bearing; a torsion spring is arranged between the winding pipe and the synchronous rod so that the curtain is tensioned between the pull rod and the winding pipe; two T-shaped steering gear cases are symmetrically arranged at two ends of the synchronous rod; X-axes of the T-shaped steering gear cases are connected to the ends of the adjacent synchronous rod; each foldable support is formed by hinging at least two rods, the two foldable supports are symmetrically arranged on two sides of the curtain, a lower rod of each foldable support is connected with a Y-axis of each adjacent T-shaped steering gear case, and upper rods of the foldable supports are connected with the pull rod; limiting modules are arranged on two sides of the curtain and correlated with the adjacent foldable supports so that the foldable supports are kept at spread positions after the foldable supports rotate to extreme positions; and the X-axes and the Y-axes are perpendicular to each other spatially.

Description

technical field [0001] The invention relates to a floor-mounted lifting projection screen. Background technique [0002] The image projected by the projector is finally imaged by the projection screen. Projection screens can be divided into many types due to their structural characteristics. Among them, the pneumatic floor curtain is more common in the market because it is easy to store and carry, and it is more convenient to use. [0003] The pneumatic curtain is mainly composed of upper cover, lower box, rotating tube, curtain, pull rod, scissors bracket structure, gas spring and so on. When not in use, the revolving tube, pull rod and scissors support structure of the rolled up curtain are all stored in the lower box, and the upper cover can be closed and can be stored and carried conveniently. [0004] When in use, manually pull up the pull bar after opening the upper cover. Under the boosting action of the thrust released by the gas spring in the scissors support st...

Claims

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Application Information

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IPC IPC(8): G03B21/58F16M11/38
Inventor 崔定楠
Owner 崔定楠
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