A device for cleaning and collecting chalk dust on a blackboard

Abstract

The invention discloses a device for cleaning and collecting chalk dust on a blackboard eraser. The device comprises a rotary shaft, an upper cover, buttons, a device body, a pulley, a manual rocker handle, a transferring belt, a motor, supporting shafts and a cleaning ring. The device has dual functions of automatic cleaning of the chalk dust on the blackboard eraser and manual cleaning of the chalk dust on the blackboard eraser. The upper cover is arranged on the upper end face of the device body. The cleaning ring is installed and fixed on the rotary shaft. Strip-shaped protrusions with the same structure are evenly distributed on the cleaning ring. The top end of a wedge-shaped boss on each strip-shaped protrusion is slightly lower than the top end of a pointy protrusion of a conical boss. The supporting shafts can reduce resistance in the cleaning process of the chalk dust on the blackboard eraser and also can limit the surface position of the blackboard eraser. The device body is a thin-wall hollow container and is of a closed structure except for the upper cover and installation structure holes, so that the collection function of collecting the chalk dust after the chalk dust on the surface of the blackboard eraser is cleaned is achieved. The device is simple in structure, convenient to operate, good in cleaning effect and convenient and reliable in collection and facilitates popularization in 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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