Environment-friendly blackboard eraser
An environmentally friendly blackboard and blackboard eraser technology, applied in the field of teaching aids, can solve the problems of chalk dust flying all over the sky, and achieve the effect of compact structure, convenient use, and less space occupation
Inactive Publication Date: 2013-11-13
龚圣
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[0014] With reference to the accompanying drawings, the environmental protection blackboard eraser of the present invention is composed of a wet erasing strip, a dry erasing strip, a waterproof plastic film, a Velcro, and an erasing strip seat. The environmental-friendly blackboard eraser is divided into wet erasing strips (1) accounting for about one-third and dry erasing strips (2) accounting for about two-thirds with a waterproof plastic film (3). The wet erase strip and the dry erase strip are made of the same material as the common blackboard eraser, and can be made of cotton strips; the wipe strip seat can be made of wood or plastic. Waterproof plastic film and Velcro can be finished products.
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The invention discloses an environment-friendly blackboard eraser. The environment-friendly blackboard eraser is composed of a wet erasing strip, a dry erasing strip, a waterproof plastic thin film, a magic tape and an erasing strip seat. The environment-friendly blackboard eraser disclosed by the invention is compact in structure, simple, scientific, practical, economical, attractive and elegant, occupies a small space, is convenient to use, is environment-friendly and is particularly suitable for school teaching. The environment-friendly blackboard eraser erases chalk characters for one time, absorbs chalk dust, and does not raise the dust when wiping a blackboard. The environment-friendly blackboard eraser disclosed by the invention overcomes the defects that the chalk dust flies everywhere when a teacher erases the blackboard, the teacher is suffered from the bad condition and students sitting on the front row are also suffered from the bad condition, the teacher and the students breathe a lot of the chalk dust after one class, and serious diseases, even life-threatening diseases including pulmonary infection, lung calculus, lung bronchitis and the like, can be triggered when the teacher works under an environment with a high chalk dust concentration for long time.
Description
technical field [0001] The invention belongs to teaching aids, and relates to an environment-friendly blackboard eraser. Background technique [0002] For quite a long time in rural schools, blackboard, chalk, and blackboard eraser are still the most economical and practical combination for teaching. How to solve the problem of the diffusion of chalk dust during use is: when the teacher wipes the blackboard with an ordinary blackboard, chalk dust is flying all over the sky, the teacher suffers, and the students sitting in the front row also suffer, chalk dust "eats" after a class Not a lot! [0003] Working in an environment with a high concentration of chalk dust for a long time can cause serious and even life-threatening diseases, such as: lung infection, lung stones, pulmonary bronchitis, etc. Contents of the invention [0004] The purpose of the present invention is to develop an environmentally friendly blackboard eraser to solve the problem of chalk dust flying all...
Claims
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Inventor 龚圣
Owner 龚圣