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Dust-free eraser

A dust board and board eraser technology, which is applied in the field of educational equipment manufacturing, can solve the problem of large dust and achieve the effect of easy replacement

Active Publication Date: 2019-01-18
岑溪市拓丰科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dust-free board eraser, which can solve the problem of large dust when the board eraser wipes the blackboard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1~Figure 3 The shown dust-free eraser comprises a closed lower chamber 13 and an upper chamber 12 connected with the lower chamber 13, the lower chamber 13 is surrounded by the housing 6, the upper chamber 12 is surrounded by the housing 4, and the lower chamber 12 is surrounded by the housing 4. The casing 6 of the chamber 13 and the casing 4 of the upper chamber 12 are made of plastics, and the upper chamber 12 and the lower chamber 13 are cuboids; the lower chamber 13 communicates with the upper chamber 12 through the through hole 10, and the lower chamber Chamber 13 is provided with water-filling hole 8, and water-filling hole 8 is provided with blocking cover 7, and the volume of upper chamber 12 is greater than the volume of lower chamber 13, and upper chamber 12 is connected with lower chamber 13 by adhesive; Upper chamber 12 A base 3 is provided inside, and an eraser sheet 2 is provided in the base 3. In the present embodiment, the eraser sheet 2...

Embodiment 2

[0025] Such as Figure 4~Figure 5 In the dust-free eraser shown, the upper chamber is a semicircular chamber, and the eraser piece is also made into a corresponding circular arc shape; other features are the same as in the first embodiment.

Embodiment 3

[0027] Such as Figure 6~Figure 7 In the shown dust-free board eraser, the board eraser piece is fixed on the outer surface of the upper chamber, and the upper chamber is a cavity, and the rest is the same as the first embodiment. This embodiment is a disposable dust-free board eraser, which is thrown away after wear and tear.

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PUM

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Abstract

The invention discloses a dust-free eraser, and relates to the technical field of educating instruments. The dust-free eraser comprises a closed lower chamber and an upper chamber connected with the lower chamber. The lower chamber communicates with the upper chamber by virtue of a through hole. A water feeding hole is formed in the lower chamber. A blanking cap is arranged on the water feeding hole. A base is arranged in the upper chamber. Eraser plates are arranged in the base, and extend out of a housing of the upper chamber. A water absorption layer is arranged outside the housing of the upper chamber. Micropores are formed in the water absorption layer and communicate with the upper chamber. Compared with the prior art, the dust-free eraser can solve the problem that at present, too much dust is generated when a blackboard is erased with an eraser.

Description

technical field [0001] The invention relates to the technical field of educational equipment manufacturing, in particular to a blackboard eraser for teaching. Background technique [0002] Today, with the popularization of computer technology, in some schools, especially some primary and secondary schools, teachers still use chalk to write on the blackboard for teaching. As we all know, after chalk is written on the blackboard, it will drop a lot of chalk dust when it is wiped with an eraser. , Chalk dust causes health hazards to teachers and students on duty. Contents of the invention [0003] The purpose of the present invention is to provide a dust-free blackboard eraser, which can solve the problem of large dust when the current blackboard eraser wipes a blackboard. [0004] In order to solve the above problems, the technical solution adopted in the present invention is: [0005] This dust-free board eraser includes a closed lower chamber and an upper chamber connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43L21/02
CPCB43L21/02
Inventor 曾明邓晓梅曾纤惠曾凡杰
Owner 岑溪市拓丰科技发展有限公司