A new type of exhibition projection screen frame

Abstract

The invention relates to a novel projection screen frame for exhibitions, which comprises an upper frame device and a lower frame device with an angle adjustment mechanism and a length adjustment mechanism, and an extension rod is arranged between the two. The length adjustment mechanism includes an adjustment rod, and a telescopic rod that can slide along its length direction is inserted in the adjustment rod, and a positioning assembly is arranged between the adjustment rod and the telescopic rod. The angle adjustment mechanism includes a first connection end and a second connection end fixedly connected to the tail end of the telescopic rod and the head end of the adjustment rod respectively, and a linear drive is hinged between the two. A hinge chain capable of hinged connection between the two connection ends is provided. The lower frame device also includes universal joints respectively fixed on the top surfaces of the first and last ends of the lower frame device and having first connecting rods. The upper frame device also includes universal joints respectively affixed to the bottom surfaces at both ends of the front and rear ends and provided with second connecting rods. Both ends of the extension rod are detachably connected with the two connecting rods respectively. A movable and fixed positioning sleeve is arranged on the outer surface of the universal joint.

Description

technical field [0001] The invention relates to the field of projection, in particular to a novel projection screen frame for exhibitions. Background technique [0002] The projection screen is the peripheral equipment of the projector. The graphics are projected onto the screen through the projector, and the image can be enlarged and displayed. It is one of the commonly used equipment in exhibitions. In order to adapt to different booths, the existing exhibition halls generally do not set up fixed projection screens. When the size of the projection screen is large, the workload and time for building and dismantling the projection screen frame are heavy and time-consuming, and it is very difficult to use it as a temporary device. Inconvenient; at present, most of the screens are flat, but flat screens may have reflections caused by angle problems. In order to meet the needs of the exhibition hall, it is necessary to arrange arcs when necessary, which increases the cost. Co...

AI Technical Summary

Problems solved by technology

In order to adapt to different booths, the existing exhibition halls generally do not set up fixed projection screens. When the size of the projection screen is large, the workload and time for building and dismantling the projection screen frame are heavy and time-consuming, and it is very difficult to use it as a temporary device. Inconvenient; at present, most of the screens are flat, but flat screens may have reflections caused by angle problems. In order to meet the needs of exhibition halls, arcs must be arranged when necessary, which increases the cost

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