Blackboard eraser

Abstract

The invention discloses a blackboard eraser. The blackboard eraser comprises an erasing device, a transmission supporting device and a blackboard eraser shell, wherein the erasing device comprises anerasing body shell, a sponge body and elastic erasing cloth, the transmission supporting device comprises two springs, a sliding way connected with the erasing body shell, a sliding way connected withan eraser bottom base plate, triangular connecting rods, two power columns embedded into an eraser body and cuboid sliding blocks connected with the power columns, and the blackboard eraser shell comprises a hyperbolic shell body and a pair of embedded empty grooves where three pairs of rectangular magnets can be embedded. The blackboard eraser is simple in structure, a teacher cannot make contact with an erasing body with a large amount of dust while not turning over the blackboard eraser, the blackboard eraser is simple, rapid, clean and sanitary, meanwhile, when the elastic erasing cloth is cleaned, the erasing cloth can rapidly vibrate up and down by repeatedly and rapidly pressing the power columns, the dust removal function is achieved, and practicability is high.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to a blackboard eraser which can directly absorb the surface of a blackboard and is easy to clean the dust on the surface. Background technique [0002] At present, the application of multimedia teaching aids is more and more extensive, but it still cannot replace the traditional teaching method of using chalk writing. In the teaching stage, the blackboard eraser is a tool that teachers use more frequently, but often because the blackboard eraser is placed everywhere, the teacher spends a lot of time looking for the blackboard eraser; the traditional blackboard eraser is placed on the back of the eraser. Turn over the blackboard eraser, which will dirty the contact part of the user's body and the blackboard eraser, and cause this type of blackboard eraser to be placed on a flat surface for a long time, resulting in the situation that its adsorption function cannot be fully utilized; when clean...

AI Technical Summary

Problems solved by technology

[0002] At present, the application of multimedia teaching aids is becoming more and more extensive, but it still cannot replace the traditional teaching method of writing with chalk

In the teaching stage, the blackboard eraser is a tool that teachers use more frequently, but often because the blackboard eraser is placed everywhere, the teacher spends a lot of time looking for the blackboard eraser; the traditional blackboard eraser is placed on the back of the eraser. Turn over the blackboard eraser, which will dirty the contact part of the user's body and the blackboard eraser, and cause this type of blackboard eraser to be placed on a flat surface for a long time, resulting in the situation that its adsorption function cannot be fully utilized; when cleaning the blackboard eraser, the physical impact method is generally used , use the blackboard eraser to collide with hard objects to achieve the function of cleaning dust, which often leads to secondary pollution of hard objects when the dust on the blackboard eraser is not cleaned, and the dust on the surface of the blackboard eraser is not easy to clean

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