A device for cleaning and collecting chalk dust on a blackboard

Abstract

The invention discloses a device for cleaning and collecting chalk dust on blackboards, which includes a rotating shaft, an upper cover, a button, a device body, a pulley, a manual crank, a transmission belt, a motor, a support shaft and a cleaning ring. It has dual functions of automatically cleaning the chalk dust on the blackboard eraser and manually cleaning the chalk dust on the blackboard eraser. The upper end of the device body is designed with an upper cover; the cleaning ring is installed and fixed on the rotating shaft; strip-shaped protrusions with the same structure are evenly distributed on the cleaning ring, and the top of the wedge-shaped boss on each strip-shaped protrusion is slightly lower than the conical boss. The top of the pointed protrusion; the support shaft can not only reduce the resistance during the cleaning process of chalk dust on the blackboard eraser, but also limit the surface position of the blackboard eraser; the device body is a thin-walled hollow container, which is closed except for the upper cover and the installation structure hole. The structure realizes the function of collecting the chalk dust on the surface of the blackboard eraser after it is cleaned. It has a simple structure, convenient operation, clean cleaning effect, convenient and reliable collection, and is conducive to the promotion of the field of teaching auxiliary devices.

Description

[0001] Technical field [0002] The invention relates to the technical field of teaching aids, in particular to a device for cleaning and collecting chalk dust on blackboard erasers. Background technique [0003] All kinds of schools such as elementary school, middle school and university, in the teaching process, the modal teaching form is that the teacher needs to use chalk to write on the blackboard on the blackboard during the teaching process, and then erase it with a blackboard eraser. During the recycling of the blackboard eraser, the chalk dust accumulated on it needs to be cleaned up in time, otherwise it will affect the wiping effect of the blackboard eraser. [0004] At present, the common method of cleaning the chalk dust on the blackboard eraser is to pat or scratch the blackboard eraser at corners, etc., causing the chalk dust to fly everywhere, affecting the environment and harmful to health; the patent of Publication No. CN2877902 discloses a chalk dust collect...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the conventional method of cleaning the chalk dust on the existing blackboard eraser, the blackboard eraser is patted or scratched at the corner of the wall, etc., causing the chalk dust to fly everywhere, affecting the environment and harmful to health; there is no limit between the brown tow and the blackboard eraser, There are dead corners for cleaning chalk dust on blackboard erasers, there is no cleaning of chalk dust, and it is completely dependent on manual operation and other defects. This invention provides a new device for cleaning and collecting chalk dust on blackboard erasers.

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