Dustproof eraser

Abstract

The invention discloses a dustproof eraser, comprising an eraser body and a dustproof shell. The front face of the eraser body is flush with that of the dustproof shell; the rear wall of the eraser body is vertically provided with three insert plates; the end, far away from the eraser body, of each insert plate is provided with a receiving port; the inner side of the rear wall of the dustproof shell is vertically provided with three insert posts; the insert plates are in one-to-one correspondence inserted connection with the insert posts; the front face of the dustproof shell is provided witha circular magnet. The dustproof allow chalk dust, which falls during wiping, to be collected in a dust collection chamber, subsequent central processing is benefited, dust flying is avoided, and physical health is guaranteed for teachers and students.

Description

Technical field [0001] The invention belongs to the field of teaching appliances, and specifically relates to a dust-proof blackboard eraser. Background technique [0002] The blackboard is an indispensable teaching aid in the school education process. It can be written repeatedly with chalk on the blackboard. The blackboard can be divided into various types, such as green board blackboards, color coated steel board blackboards, and new materials. Board blackboards, magnetic blackboards, glass blackboards, etc., among them, a magnetic blackboard is a blackboard lined with magnetic strips or magnetic particles on the surface. Because the surface of the board is magnetic, it can be fixed with magnetic nails, magnetic blocks, etc. Small teaching tools or pictures for easy display. [0003] The chalk characters written on the blackboard are usually erased with a blackboard eraser. When the traditional blackboard eraser erases the chalk characters on the blackboard, a large amount of d...

AI Technical Summary

Problems solved by technology

[0003] The chalk characters written on the blackboard are usually erased with a blackboard eraser. When the traditional blackboard eraser erases the chalk characters on the blackboard, a large amount of dust will fall and fly, seriously affecting the health of teachers and students. Therefore, it is urgently needed Design a blackboard eraser that can prevent chalk dust from flying around to protect the health of teachers and students

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