Multifunctional blackboard eraser

Abstract

The invention relates to a multifunctional blackboard eraser and belongs to the technical field of education supplies. The blackboard eraser comprises an eraser box (1) and an erasing part (2) which is fixed on the eraser box (1). A cavity is formed in the eraser box (1) and a dust sucking device is arranged on the eraser box (1). The dust sucking device comprises a switch (8) which is arranged at the side face of the eraser box (1), a dust sucking hole (3) which is communicated with the cavity and a dust collector (4) which is arranged in the cavity and is equipped with a power supply. The switch (8) and the dust collector (4) are in series connection. The multifunctional blackboard eraser disclosed by the invention can reduce the sprinkle of dust to prevent people who erase the blackboard from inhaling a large quantity of dust and can be used by users with different heights to enable users to erase the blackboard completely. The practicability of blackboard erasers is improved.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to a multifunctional blackboard eraser, which belongs to the technical field of teaching supplies. Background technique [0002] Blackboards are often used in teaching. The direct effect of the blackboard makes it easier for students to understand the knowledge points involved. When writing mistakes or the blackboard is full, it is necessary to use a blackboard eraser to wipe it and rewrite it. Therefore, for the blackboard Blackboard eraser is a very important accessory tool. The traditional blackboard eraser includes a wiping box and a wiping part. By holding the wiping box and making the wiping part contact with the blackboard, the written handwriting is erased, thereby realizing the wiping function. Such a blackboard eraser has a simple structure and a single function, and is widely used, but it There are also some problems. The blackboard eraser of this structure makes the dust too larg...

AI Technical Summary

Problems solved by technology

The traditional blackboard eraser includes a wiping box and a wiping part. By holding the wiping box and making the wiping part contact with the blackboard, the written handwriting is erased, thereby realizing the wiping function. Such a blackboard eraser has a simple structure and a single function, and is widely used, but it There are also some problems

The blackboard eraser of this structure makes the dust too large when wiping, and it is easy to dirty the arm, so that the person holding the blackboard eraser inhales a large amount of dust, which affects the health. For some teachers or students with limited height, it is difficult to wipe the blackboard. The upper end limits the use of the blackboard eraser and fails to clean the blackboard well, thus causing unnecessary trouble to teaching

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