Projection curtain structure for education and teaching

Abstract

The invention discloses a projection curtain structure for education and teaching, and particularly relates to the technical field of projection curtains, the projection curtain structure comprises amounting box, an unwinding groove is formed in the lower wall of the mounting box, a winding and unwinding mechanism is mounted on the mounting box, an anti-curling mechanism is mounted on the lower wall of the mounting box, and the winding mechanism comprises two supporting blocks; and a worm is rotationally clamped between the two supporting blocks. According to the invention, through the arrangement of the winding mechanism, the winding of the curtain is gently controlled, and the four sides of the curtain are supported during winding, so that the position of the curtain is more stable, theinfluence from the outside is small, the projection effect is good, and the ideological and political education effect is ensured; Through the arrangement of the anti-curl mechanism, the curtain canbe smoothened from the upper part when the curtain is rolled, so that the curtain is prevented from wrinkling and creasing during rolling, the service life of the curtain is prolonged, the surface ofthe curtain is fully cleaned every time the curtain is rolled, and the projection imaging effect is ensured.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of projection screens, in particular to a projection screen structure for education and teaching. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signal. A projector is an optical instrument that uses optical elements to magnify the outline of a workpiece and project it onto a video screen. It can be used for profile measurement with transmitted light, and can also be used to measure the surface shape of a non-through hole and observe the surface of a part with reflected light. The projector is especially suitable for measuring complex contours and small workpieces, such as watch parts, stamping parts, electronic components, templates, molds, threads, gears and forming tool...

AI Technical Summary

Problems solved by technology

[0004] 1. After the projection screen is unfolded, it hangs freely. Although there is a support shaft at the lower end that exerts a downward force on the screen, the screen is still easily shaken or even curled by external influences, causing the entire projection surface to move accordingly, thereby making the projection The fonts and graphics on the surface are blurred, and the projection effect is affected, so that it affects the teaching effect of ideological and political

[0005] 2. During the rolling process of the projection screen, it may be uneven due to problems such as the winding angle, which may cause wrinkles or even creases on the screen, which greatly shortens the service life of the screen, and due to the white display effect Well, the projection screen is mostly made of white pvc material. During the teaching process, the screen inevitably comes into contact with a large amount of dust that falls from the teacher's writing. The screen is distributed vertically. It is difficult for the user to clean the entire screen, and the screen will be seriously dirty. Affect the projection imaging effect

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