Automatic reversing dust collection blackboard eraser

Abstract

The invention belongs to the technical field of blackboard erasers, and particularly relates to an automatic reversing dust collection blackboard eraser. The automatic reversing dust collection blackboard eraser comprises a housing, a working mechanism and a dust collection box, wherein the working mechanism comprises a first rotating shaft, a second rotating shaft and a second fixed shaft; the two ends of the first rotating shaft are rotationally arranged on a top plate and a bottom plate of the housing correspondingly; a second swing rod and a first swing rod are fixedly arranged on the upper part and the lower part of the first rotating shaft correspondingly; and the other end of the second swing rod penetrates the front wall of the housing and is rotationally connected with an mountingplate. According to the automatic reversing dust collection blackboard eraser, automatic reversing is achieved through relative displacement of the housing relative to cotton slivers and the mountingplate, left-right automatic reversing is achieved on the basis of mechanical dust collection, and the blackboard erasing efficiency is improved. A baffle capable of stretching out or retracting alongwith automatic reversing is arranged and used for assisting in falling of dust into a bearing piece, and the dust collection effect is improved.

Description

technical field [0001] The invention belongs to the technical field of blackboard erasers, and in particular relates to an automatic reversing dust-collecting blackboard eraser. Background technique [0002] In today's China, chalk is still a necessary tool for teachers to teach. Almost all teachers are using traditional chalk for class, and the harm caused by the dust of chalk cannot be ignored. Chalk is composed of calcium carbonate and calcium sulfate, and teachers create a lot of chalk dust when using chalk. Because the dust cannot dissipate as soon as possible, it floats in the air, endangering the health of teachers and students. At the same time, the manufacture and use of chalk will also cause many environmental pollution problems, so it is an urgent need to design a blackboard eraser that can collect dust. [0003] Based on the above situation, a large number of dust-removing blackboard erasers have appeared on the market today, such as electric blackboard erasers...

AI Technical Summary

Problems solved by technology

Due to its small negative pressure, the collection effect is not good

[0004] Patent No. "201821799665.3" discloses a mechanical dust-collecting blackboard eraser that can be moved on different sides. Although it can collect dust mechanically, it needs to turn the handle every time it changes direction to adjust the use of blackboard erasers on the left and right sides. state, resulting in the inability to continuously wipe the blackboard, causing great inconvenience

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