Teaching blackboard eraser capable of automatically collecting dust

Abstract

The invention discloses a teaching blackboard eraser capable of automatically collecting dust. The teaching blackboard eraser comprises a frame body and erasing cloth, wherein grooves are symmetrically formed in the erasing cloth, polar plates are symmetrically arranged on the two sides of the inner wall in each groove, movable grooves corresponding to the grooves are formed in the frame body, magnetic plates are fixedly mounted on the inner walls of the movable grooves, and the two opposite magnetic plates of each movable groove attract each other; a moving mechanism is arranged in each groove and comprises a connecting shaft and a guide rod; and one end of each connecting shaft is fixedly connected with the corresponding guide rod, the guide rods are arranged in the movable grooves, the other end of each connecting shaft is connected with a sliding block, and the two ends of each guide rod are fixedly connected with sliding pieces. According to the blackboard eraser, the grooves are formed in the middle of the blackboard eraser, chalk dust can enter the grooves in the blackboard erasing process, excessive accumulation on the surface of the erasing cloth is avoided, it is guaranteed that the blackboard is erased cleanly, and meanwhile in the erasing process, the guide rods in the blackboard eraser can move to generate the electromagnetic induction phenomenon.

Description

technical field [0001] The invention belongs to the technical field of teaching, in particular to an automatic dust-absorbing blackboard eraser for teaching. Background technique [0002] With the development of science and technology, teaching has become more and more electronic, but in fact there are still a large number of teaching aids using traditional chalk and blackboard teaching aids. First, the use of traditional blackboard chalk is low in cost and can adapt to regions with different levels of development. The second is that with the increase of the service life of the teaching building, the replacement of electronic teaching methods, the cost of equipment replacement and renovation is too high, so the traditional way of teaching with chalk has always existed; [0003] Use chalk to write on the blackboard. As the class progresses, the writing on the blackboard will be updated continuously. Teachers need to wipe the blackboard constantly. During the process of wiping...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, teaching has become more and more electronic, but in fact there are still a large number of teaching aids using traditional chalk and blackboard teaching aids. First, the use of traditional blackboard chalk is low-cost and can adapt to regions with different levels of development. The second is that with the increase of the service life of the teaching building, the replacement of electronic teaching methods, the cost of equipment replacement and renovation is too high, so the traditional way of teaching with chalk has always existed;

[0003] Use chalk to write on the blackboard. As the class progresses, the writing on the blackboard will be updated continuously. Teachers need to wipe the blackboard constantly. During the process of wiping the blackboard, more dust will be generated. Too much dust will affect the effect of erasing text. Inhalation by teachers or students will cause damage to the lungs, but the rise of dust is inevitable

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