Blackboard erasing device for education and teaching

Abstract

The invention relates to a blackboard erasing device, in particular to a blackboard erasing device for education and teaching. The technical problem, which the invention needs to solve, is to provide a blackboard erasing device for education and teaching, which is time-saving and labor-saving, prevents chalk dust from being inhaled and avoids damage to a human body. In order to solve the technical problem, the invention provides the blackboard erasing device for education and teaching, which comprises a lifting frame, a first sliding block, a first sliding rail, a first blackboard eraser, a rack, a disk, a first supporting rod, a first connecting rod, a second supporting rod, a second blackboard eraser, a first swinging base, a sector gear, a second connecting rod, an air cylinder, a second swinging base, an electric push rod, a second sliding block, a pull rope, an electric wheel, a second sliding rail, a third supporting rod and a third blackboard eraser, wherein the second sliding rail is arranged on the wall; and the second sliding block is arranged on the second sliding rail. The invention has the effects that the blackboard erasing device for education and teaching is time-saving and labor-saving, prevents chalk dust from being inhaled and avoids damage to the human body.

Description

technical field [0001] The invention relates to a blackboard erasing device, in particular to a blackboard erasing device for education and teaching. Background technique [0002] Education is education and cultivation. It uses existing experience and knowledge to deduce people and explain various phenomena, problems or behaviors. It basically treats people with a relatively mature or rational thinking, so that things can be approached. Its most fundamental existence is that people in it slowly change from sensory touch to cognitive understanding of a thing, and form a relatively perfect or rational self-awareness thinking. But at the same time, people have self-conscious thinking and their own sensory dimension, so any educational conscious thinking may not be absolutely correct, but should understand the direction of their thinking perceptually, as long as they do not bias the inner nature of things . [0003] Education is also a kind of teaching of thinking, and people ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantages of the present invention, which is time-consuming and labor-intensive when erasing and cleaning the blackboard, chalk dust is easily inhaled by the erasing personnel, and causes damage to the body, the technical problem to be solved by the invention is to provide a time-saving and labor-saving chalk that is not easy to inhale Device for erasing dust, education and teaching with a blackboard that will not cause damage to the body

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