A dust-absorbing environment-friendly blackboard eraser

Abstract

A dust-absorbing and environment-friendly blackboard eraser comprises an eraser board body and a felt layer, wherein an upper board, a lower board and side boards of the board eraser body form a liquid storage chamber. Both the side walls of the upper cavity of the liquid storage chamber and the side walls of the lower cavity of the liquid storage chamber are provided with liquid inlets. The upper cavity and the lower cavity are respectively used for storing cleaning agent and dust collector. The upper plate, the horizontal plate and the lower plate are respectively provided with a first through hole, a second through hole and a third through hole. The eraser body is also provided with a switch valve stem, which is inserted from the top of the upper plate, passes through the first through hole and the second through hole, and is inserted into the third through hole. The eraser body is also provided with a capillary, and the lower part of the capillary is provided with a ball valve that squeezes out liquid. The upper end of the capillary extends into the upper cavity, and the lower end extends into the felt layer. For the dust-absorbing environment-friendly blackboard eraser, the user can easily let the cleaning agent or dust-absorbing agent flow into the felt layer for cleaning and dust removal, so as to prevent the dust from falling in the air and affecting the health of teachers and students.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to an environment-friendly blackboard eraser which is convenient for cleaning and capable of removing dust. Background technique [0002] In the existing teaching process, chalk is the most frequently used teaching aid in today's classroom teaching. The mode of writing with chalk to teach students knowledge is one of the teaching methods that are simple, generally accepted and easy to use. During the use of chalk, chalk powder brings many hazards to teachers engaged in education and students attending classes. With the progress of society and the acceleration of social rhythm, the rate of teachers' occupational diseases is increasing year by year, and occupational diseases are developing in a diversified direction. Among them, pneumoconiosis caused by dust and various acute and chronic respiratory diseases are currently the most important, most harmful and most widespread. an occupational dis...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of too much dust in the teaching process of using chalk in the prior art, the present invention provides a dust-absorbing and environment-friendly blackboard eraser that is easy to clean and can remove dust.

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