Environment-friendly blackboard preventing dust pollution

Abstract

The invention discloses an environment-friendly blackboard preventing dust pollution. The environment-friendly blackboard preventing the dust pollution comprises a blackboard body and a motor. The upper portion of the blackboard body is fixedly connected with an electrostatic type eraser. The lower portion of the blackboard body is fixedly connected with a dust containing box. The electrostatic type eraser comprises a dust box. A rotating shaft is arranged in the dust box and connected with a piece of eraser cloth. One end of the eraser cloth is connected with the rotating shaft, and the other end of the eraser cloth is connected with a plastic plate. The eraser cloth is a piece of conductive cloth and electrically connected with an electrostatic generator. The rotating shaft is electrically connected with the motor. A touch-pressure switch is arranged on the plastic plate and is in signal connection with the electrostatic generator. According to the environment-friendly blackboard preventing the dust pollution, the physical character that an electrified body attracts tiny objects is utilized, and chalk dust is restrained from flying by controlling the electricity capacity of the eraser; and therefore, the physical health of teachers and students is effectively protected, and the teachers and the students are protected against dust hazards. The environment-friendly blackboard preventing the dust pollution is simple in structure and convenient to operate; and meanwhile, existing blackboards made from various materials can be refitted to be the environment-friendly blackboards preventing the dust pollution, and therefore application and popularization are benefited.

Description

technical field [0001] The invention relates to the field of blackboards, in particular to an environment-friendly blackboard for preventing dust pollution. Background technique [0002] The blackboard is the most important tool in education and teaching. Although there are various emerging teaching equipment such as display screens and projections, the blackboard is irreplaceable as the most extensive tool. Present blackboard has glass blackboard, cement blackboard, wooden blackboard, macromolecular polymerization blackboard etc., and it all can produce a large amount of chalk dusts when wiping blackboard. It takes about 16 years for a student from elementary school to college, which is also the golden period of growth, and dust pollution seriously affects the development and health of students. It takes about 40 years for a teacher to go from standing to the podium to retiring. Dust pollution has seriously affected the physical and mental health of teachers. [0003] Tho...

AI Technical Summary

Problems solved by technology

[0003] Although there are also various dust-proof blackboards, most of them are not effective, have complex structures, and are inconvenient to use, which is not conducive to popularization.

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