Electric blackboard chalk dust erasing device

Abstract

The invention provides an electric blackboard chalk dust erasing device. The device comprises a bottom plate, the periphery of the bottom plate is fixed on a wall through bolts, four groups of fixing shafts are arranged at the four corners of the bottom plate, four sets of chain wheels are axially mounted on the four sets of fixing shafts, one set of the chain wheels is connected with an output shaft of a motor, and the motor is embedded in the wall. When the blackboard chalk dust erasing device is used, the motor is started, the chain wheels connected with the output shaft of the motor start to rotate, under the transmission of a chain, the other three sets of chain wheels rotate along with the chain wheels, and a pushing block rotates around the four sets of chain wheels; the pushing block is always clamped in a pushing groove in the moving process, when the pushing block moves in the vertical direction, a scraping plate is static, and when the pushing block moves in the horizontal direction, the scraping plate is driven to move; due to the fact that the pushing block moves back and forth under the action of the chain, the scraping plate is driven to move back and forth, and chalk dust erasing is carried out on a writing board.

Description

technical field [0001] The invention relates to the field of education technology, in particular to an electric blackboard chalk dust erasing device. Background technique [0002] For the convenience of teaching, teachers mainly use chalk to write on the blackboard to impart knowledge to students when lecturing to students, but when erasing chalk dust, because the blackboard is large and the blackboard eraser is small, the erasing efficiency is very low. When smaller students wipe the blackboard, it is difficult to erase the chalk dust near the top of the blackboard, and they will also inhale a large amount of chalk dust when erasing. For this reason, we propose an electric blackboard chalk dust erasing device to solve the above problems. question. Contents of the invention [0003] The object of the present invention is to provide an electric blackboard chalk dust erasing device, to solve the problems raised in the above-mentioned background technology. [0004] In orde...

AI Technical Summary

Problems solved by technology

[0002] For the convenience of teaching, teachers mainly use chalk to write on the blackboard to impart knowledge to students when lecturing to students, but when erasing chalk dust, because the blackboard is large and the blackboard eraser is small, the erasing efficiency is very low. When smaller students wipe the blackboard, it is difficult to erase the chalk dust near the top of the blackboard, and they will also inhale a large amount of chalk dust when erasing. For this reason, we propose an electric blackboard chalk dust erasing device to solve the above problems. question

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