Dust collection type blackboard eraser for teaching based on centrifugal force

Abstract

The invention discloses a dust collection type blackboard eraser for teaching based on centrifugal force. The dust collection type blackboard eraser comprises a shell, a mounting block is fixedly connected to the side wall of the shell, a plurality of movable cleaning plates are arranged on the side wall of the mounting block, a dust collection mechanism used for collecting chalk dust generated in the blackboard erasing process is arranged on the mounting block, the dust collection mechanism comprises a control cavity formed in the mounting block, a magnetic sliding plug is connected to the inner wall of the control cavity in a sealed and sliding mode, and a dust collection cavity in the vertical direction is formed in the mounting block. According to the blackboard eraser, the phenomenon that the chalk dust flies around in the blackboard erasing process can be effectively avoided, the chalk dust is prevented from being inhaled into bodies of students and teachers, and therefore the influence of the chalk dust flying around on the students and teachers is greatly reduced, the health of the students and teachers is guaranteed, a blackboard can be erased more comprehensively, therefore, the cleaning effect on the blackboard is improved, and meanwhile the condition that the blackboard eraser can have a good cleaning effect after the blackboard is erased many times is ensured.

Description

technical field [0001] The invention relates to the technical field of blackboard erasers, in particular to a vacuum-type blackboard eraser for teaching based on centrifugal force. Background technique [0002] Blackboard eraser, also called chalk eraser, is a tool for erasing chalk writing. Traditional blackboard erasers usually have the following disadvantages during use: [0003] 1. As we all know, in the process of using a blackboard eraser to wipe the chalk writing on the blackboard, the chalk dust wiped off will fly around, and the main components of the chalk dust are calcium carbonate, calcium oxide, etc. If it falls into people's eyes, It will stimulate the secretion of lacrimal glands and cause certain damage to the eyes. When it falls on the skin, it will also stimulate the skin membrane, making the skin dry and rough. This is the case for a long time. For students in the classroom, especially those who work next to the blackboard For teachers, it will cause cert...

AI Technical Summary

Problems solved by technology

[0003] 1. As we all know, in the process of using a blackboard eraser to wipe the chalk writing on the blackboard, the chalk dust wiped off will fly around, and the main components of the chalk dust are calcium carbonate, calcium oxide, etc. If it falls into people's eyes, It will stimulate the secretion of lacrimal glands and cause certain damage to the eyes. When it falls on the skin, it will also stimulate the skin membrane, making the skin dry and rough. This is the case for a long time. For students in the classroom, especially those who work next to the blackboard For teachers, it will cause certain harm;

[0004] 2. After the blackboard eraser is used for a long time, a large amount of chalk dust will adhere to the felt surface of the blackboard eraser. The chalk dust acts as a substance similar to "lubricant" between the blackboard and the eraser, reduc

Images