A vacuuming blackboard eraser for teaching based on centrifugal force

Abstract

The invention discloses a vacuuming type blackboard eraser for teaching based on centrifugal force, comprising a casing, a side wall of the casing is fixedly connected with a mounting block, the side wall of the mounting block is provided with a plurality of movable cleaning plates, the mounting block is The block is provided with an ash suction mechanism for absorbing the chalk ash produced in the process of wiping the blackboard. The ash suction mechanism includes a control cavity opened inside the installation block, and the inner wall of the control cavity is sealed and slidably connected with a magnetic sliding plug, so The inside of the installation block is provided with a dust suction chamber along the vertical direction. The invention can effectively avoid the phenomenon of chalk ash being scattered around in the process of wiping the blackboard, avoid chalk ash being inhaled by students and teachers, thereby greatly reducing the impact of scattered chalk ash on students and teachers, and ensuring the safety of students and teachers. Healthy, it can also wipe the blackboard more comprehensively, thereby improving the cleaning effect of the blackboard, and at the same time ensuring that the blackboard wiper can still have a better cleaning effect after wiping the blackboard for many times.

Description

technical field [0001] The invention relates to the technical field of blackboard erasers, in particular to a vacuuming type blackboard eraser for teaching based on centrifugal force. Background technique [0002] A blackboard eraser, also called a chalk eraser, is a tool for erasing chalk writing. Traditional blackboard erasers usually have the following deficiencies 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 wiped chalk ash will fly around, and the main components of chalk ash are calcium carbonate, calcium oxide, etc. If it falls into human eyes, It will stimulate the secretion of the lacrimal gland 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 working next to the blackboard The teacher will cause some harm; [0004]...

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, reducing the friction between the blackboard eraser and the blackboard. The blackboard eraser has a clear effect on chalk writing. If this happens for a long time, there will be many messy chalk writing on the blackboard, and even students may not be able to see the words on the blackboard clearly, which will have a certain impact on the teaching process;

[0005] 3. When a certain amount of chalk dust is attached to the felt surface of the blackboard eraser, it is usually necessary to clean the blackboard eraser. In the traditional cleaning method, the person holds the blackboard eraser and pats it on the wall or the ground, thereby slapping the chalk dust on the blackboard eraser. During this process, the chalk dust will fly around, not only easily inhaled by people, but also attached to people's clothes to make clothes dirty, which brings great troubles to people.

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