Environmental protection chalk

Abstract

The invention relates to the environment protective chalk.The chalk core uses chalk liquid changing to solid to reduce powder greatly. The chalk core is installed on the special chalk shell to reduce contamination to hands.

Description

Technical field [0001] The invention relates to a chalk, in particular to an environmentally friendly chalk, which comprises two parts: a chalk shell and a chalk core. Background technique [0002] Chalk is an indispensable tool for teachers to impart knowledge and students to absorb knowledge. In view of the shortcomings of traditional chalk, such as dust generation, skin irritation, unsanitary and easy breakage, many people have made improvements to traditional chalk. Improvements are mainly focused on reducing chalk dust and using chalk sets. In terms of reducing the dust of chalk, some people have proposed an improved scheme of disposing the chalk into a liquid form and filling this liquid chalk in the pen. Although this kind of liquid chalk can achieve the purpose of reducing dust, its disadvantage is that when the liquid chalk is filled in the pen body, it is limited by the thickness of the pen core. Generally, the maximum thickness of the pen core is 5 mm. The students in ...

AI Technical Summary

Problems solved by technology

Although this liquid chalk can achieve the purpose of reducing dust, its shortcoming is that when this liquid chalk is filled in the pen body, it is limited by the thickness of the pen core. Generally, the thickest of this pen core is 5 mm. The students in the back row seem to be struggling

[0003] And the technical scheme of using chalk cover mostly is that common chalk is installed on the chalk cover, can only solve the problem of not polluting user's hand, reduce the skin irritation, can not solve the problem of eliminating dust

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