Blackboard

A blackboard and glass technology, applied in the field of blackboards, can solve the problems of easy breaking of chalk, waste of resources, insufficient use, etc., and achieve the effect of no environmental pollution and waste of resources, causing environmental pollution and waste of resources.

Inactive Publication Date: 2012-02-15
王静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the teacher used chalk to write on the blackboard. The dust will cause great harm to the teacher's body, and the teacher will be easily fatigued after writing for a long time.
On the other hand, chalk is easy to break, and it is not used enough, which causes the waste of resources and the pollution of the environment, which is not environmentally friendly enough.

Method used

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Embodiment Construction

[0008] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0009] as attached figure 1 Shown, the present invention comprises blackboard 1 and the glass layer 3 of its front end, the middle embeds magnetic sand 2, and magnetic sand 2 is not tightly adsorbed on the glass layer 3, when writing on blackboard with writing pen, because The effect of magnetic force, the small magnet of writing pen attracts magnetic sand on the glass, forms handwriting; When handwriting needs to be wiped place, the long rolling bar 4 between blackboard and glass rolls the handwriting place on glass plate.

[0010] As one of the improvement solutions of the present invention, the brush eraser may include an electric device to drive the long scroll bar to automatically perform black plate detection and removal.

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PUM

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Abstract

The invention discloses a blackboard, comprising a common blackboard surface, wherein a layer of extremely thin and hard transparent white glass is paved in front of the common blackboard surface, a layer of magnetic sand capable of being absorbed by a magnet penetrates into the part between the glass and the blackboard to be absorbed on the glass not tightly, the cartridge of a writing pen is a small magnet, and a pen eraser is a long rolling strip installed between the blackboard and the glass. The blackboard has the advantages that in the use process, no dust is generated, no harm is generated to bodies of users, and environmental pollution and resource waste are not produced.

Description

technical field [0001] The invention relates to a blackboard, in particular to a magnet type blackboard. Background technique [0002] In the past, teachers used chalk to write on the blackboard. The dust would cause great harm to the teacher's body, and the teacher would be easily fatigued after writing for a long time. On the other hand, chalk is easy to break, and use is insufficient, has caused the waste of resource and the pollution of environment, not enough environmental protection. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned defects and provide a magnetic blackboard which does not generate dust. [0004] The scheme of the present invention is: lay one deck extremely thin hard transparent white glass before the surface of an ordinary blackboard, infiltrate a layer of magnetic sand that can be absorbed by magnets between the glass and the blackboard, and make the magnetic sand not tightly Adsorbed on the...

Claims

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Application Information

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IPC IPC(8): B43L1/04H01F7/02
Inventor 王静
Owner 王静
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