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Blackboard eraser

A technology of blackboard eraser and blackboard, which is applied in the field of tools for wiping blackboards

Inactive Publication Date: 2009-12-30
SHANGHAI BUSINESS & INFORMATION COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to improve the above deficiencies, to provide an automatic blackboard eraser that can wipe the handwriting on the blackboard, save time and effort, and reduce environmental pollution.

Method used

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  • Blackboard eraser

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Embodiment Construction

[0011] 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.

[0012] see figure 1 , a blackboard eraser, comprising a bar-shaped eraser head 2 arranged on a blackboard 3, a guide rail 7 arranged above the blackboard, a switch 1 arranged on one side of the blackboard, and the bar-shaped eraser head 2 is provided with a blackboard wiper Bristles, the strip-shaped wipe head is connected with a telescopic curved arm 6, and one end of the curved arm is provided with a pulley 4 that can roll on a guide rail 7. The strip-shaped wiping head 2 is provided with an elastic device that makes the bristles close to the blackboard. The pulley 4 is connected with a motor 5 that drives its rotation, and the motor 5 is connected with a switch 1 circuit to control the automatic reversing and rolling of the pulley 4 and the ...

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PUM

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Abstract

The invention discloses a blackboard eraser, which comprises a strip-type rubber head arranged on a blackboard and a guide rail arranged on the upper part of the blackboard, wherein the strip-type rubber head is provided with bristle for wiping the blackboard; the strip-type rubber head is connected with an expandable crank arm; one end of the crank arm is provided with a pulley capable of rolling on the guide rail; the pulley is connected with a motor for driving the pulley to rotate; and the strip-type rubber head is provided with an elastic device for enabling the bristle to attach to the blackboard tightly. The blackboard eraser has the advantages that the blackboard eraser can effectively wipe out the chalk trace on the blackboard by moving the blackboard eraser strips up and down as well as left and right through the guide rail; and because the blackboard is not wiped by hands directly, the blackboard eraser can achieve the effect of saving time and labour.

Description

technical field [0001] The invention relates to a tool for wiping a blackboard, in particular to an automatic blackboard eraser. Background technique [0002] Cultural education, especially basic education, is mainly completed in the classroom, and the blackboard is an indispensable teaching tool for classroom education. At present, the teaching tools used in schools are still based on traditional blackboards. The method of wiping this kind of blackboard is to hold a blackboard eraser and wipe it repeatedly on the blackboard. The wiping operation method of this blackboard eraser is time-consuming and laborious, and can seriously cause respiratory diseases, not only pollute the environment, but more seriously bring hidden dangers to people's health, and increase the respiratory disease incidence of teachers. Contents of the invention [0003] The technical problem to be solved by the present invention is to improve the above deficiencies and provide an automatic blackboard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/00
Inventor 王煜章文浩
Owner SHANGHAI BUSINESS & INFORMATION COLLEGE
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