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Magnetic chalk

A chalk and magnetic technology, applied in the field of chalk with magnetization and demagnetization functions, can solve problems such as affecting the health of teachers and students, flying chalk dust, and polluting the indoor air of classrooms.

Inactive Publication Date: 2009-04-29
SHANGHAI HUANGPU DISTRICT XINLING ELEMENTARY SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The chalk widely used at present mostly adopts lime chalk. When erasing the chalk writing on the blackboard with a blackboard eraser, it often causes chalk dust to fly, pollutes the indoor air in the classroom, and affects the health of teachers and students.

Method used

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  • Magnetic chalk

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Embodiment Construction

[0009] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0010] Such as figure 1 As shown, the main body of the magnetic chalk is a tubular rod body, and the two ends of the magnetic chalk are divided into two parts, which are respectively a magnetizing tube 1 and a degaussing tube 6. The magnetizing tube 1 is equipped with an iron filing chamber 2 for containing iron filings. The outlet 4 is equipped with a magnetizing device 3, and the degaussing tube 6 is equipped with a degaussing device (not shown in the figure), and an insulating layer 5 is provided between the magnetizing tube 1 and the degaussing tube 6 to insulate each other.

[0011] The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled ...

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Abstract

The invention relates to magnetic chalk, the main body of which is a tubular rod and the two ends of the magnetic chalk is divided into two parts, i.e., a magnetizing tube and a demagnetizing tube. The magnetizing tube is internally provided with a scrap iron room for holding scrap iron, a scrap outlet and a magnetizing device. The demagnetizing tube is provided with a demagnetizing device. An insulating layer is between the magnetizing tube and the demagnetizing tube for mutual insulation. The magnetic chalk is green and environment-friendly, non-toxic and harmless.

Description

technical field [0001] The invention relates to a writing utensil, in particular to a chalk with magnetization and degaussing functions. Background technique [0002] The chalk widely used at present mostly adopts lime chalk, when erasing the chalk writing on the blackboard with blackboard eraser, often cause chalk dust to fly, pollute the indoor air of the classroom, influence the health of teachers and students. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide magnetic chalk, which has the functions of magnetization and degaussing. [0004] The technical problem solved by the present invention can adopt following technical scheme to realize: [0005] The magnetic chalk comprises a tubular rod body, characterized in that the two ends of the tubular rod body of the magnetic chalk are respectively divided into a magnetizing tube and a degaussing tube, the magnetizing tube is equipped with an iron filing chamber fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/00B43L21/00
Inventor 金佳宜李蕾
Owner SHANGHAI HUANGPU DISTRICT XINLING ELEMENTARY SCHOOL
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