Dustproof and anti-reflection blackboard

Abstract

The dustproof and anti-reflection blackboard comprises a rectangular block, a blind hole is formed in the front end face of the rectangular block, sliding grooves are formed in the upper end and the lower end of the blind hole respectively, through grooves are formed in the middle, the left end and the right end of the front side face of each sliding groove respectively, a left blackboard and a right blackboard are arranged between the two sliding grooves, and pulleys are arranged at the left ends and the right ends of the upper side faces and the lower side faces of the blackboards respectively. Sinking grooves are formed in the upper side face and the lower side face of the blind hole respectively, a blocking strip is fixed to the middle of the rear side face of the blind hole, two sweeping rollers are arranged between the two sinking grooves respectively, the sweeping rollers can be fixed after moving to the middle of the rectangular block, and when the blackboard is parallel to the front end face of the rectangular block, the sweeping rollers slide along the sinking grooves to sweep the rear end of the blackboard; by rotating the blackboard, writing on the blackboard can be displayed to students in any direction, the problem that the writing on the blackboard cannot be seen clearly due to light reflection is prevented, meanwhile, the rear end of the blackboard can be located in the sealed cavity to be cleaned, and the situation that dust diffuses in the blackboard cleaning process is prevented.

Description

technical field [0001] The invention relates to the field of teaching aids, in particular to a dust-proof and anti-reflective blackboard. Background technique [0002] As one of the most widely used teaching tools in the teaching field, the blackboard is convenient, flexible and clear for writing on the blackboard. However, the dust generated by the chalk writing on the blackboard or wiping will diffuse into the air and be inhaled into the lungs by teachers or students, bringing health risks. , Therefore, there are many dust-free chalks on the market to solve the problem of chalk dust. The principle is to increase the weight and adhesion of the dust, so that it settles quickly or is not easy to separate from the blackboard. Although this method can reduce the dust generated when writing on the blackboard , but it is still difficult to ensure that the dust is not diffused when wiping the blackboard in a large area; there are also dust collection and filtering devices arranged...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention adopts a dust-proof and anti-reflective blackboard, which solves the problems of dust and reflection when wiping the blackboard

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