Four-line-box blackboard optical projection device adjustable in angle

Abstract

The invention belongs to the technical field of projection, and particularly relates to a four-line-box blackboard optical projection device adjustable in angle. In order to solve the problems that anoptical projection device is not adjustable in angle and poor in cooling and dehumidifying effect, the following scheme is put forwards, a hollow base is included; a lifting hydraulic oil cylinder isconnected to each of the four corners of the bottom outer wall of the base through a fastening bolt; and a supporting leg is connected to the end, away from the base, of each of the four lifting hydraulic oil cylinder through a fastening bolt. The four-line-box blackboard optical projection device adjustable in angle is provided with the base, storage can be performed in the base, a dehumidifyingdraught fan performs dehumidifying on the interior of the base, using is more convenient, parts are well protected against shock influences in the moving process, the anti-theft effect is effectivelyachieved, dehumidifying and cooling in a shell are effectively achieved, the service life of parts in the shell is prolonged, by adjusting the hydraulic oil cylinders, a slider is driven to slide ina sliding groove, the inclination angle of an installing plate is adjusted, and the projection angle is conveniently and fast adjusted.

Description

technical field [0001] The invention relates to the field of projection technology, in particular to an angle-adjustable four-line grid blackboard optical projection device. Background technique [0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be repeatedly written with chalk. The board surface is hard and is mostly used for teaching. Blackboards are generally made of wood or frosted glass. Writing materials are written on it, mostly black, dark green, white or beige. Projector is a commonly used length measuring instrument. Optical projector, also known as digital projector, is a combination of optics, precision machinery and electronic measurement. The integrated precision measuring instrument is suitable for precision industrial two-dimensional dimension measurement. The three-coordinate image measuring instrument and other series are specially developed and designed for the touch screen indus...

AI Technical Summary

Problems solved by technology

[0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be repeatedly written with chalk. The board surface is hard and is mostly used for teaching. Blackboards are generally made of wood or frosted glass. Writing materials are written on it, mostly black, dark green, white or beige. Projector is a commonly used length measuring instrument. Optical projector, also known as digital projector, is a combination of optics, precision machinery and electronic measurement. The integrated precision measuring instrument is suitable for precision industrial two-dimensional dimension measurement. The th

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