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Telescopic blackboard eraser

A blackboard eraser and telescopic technology, applied in the field of teaching tools, can solve problems such as wrist pain and inconvenience in use

Inactive Publication Date: 2014-07-30
SHENZHEN CITY FUTIAN DISTRICT SCI & TECH EDUCATION ASSOC FOR JUVENILES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a telescopic blackboard eraser. When in use, the blackboard eraser automatically stretches and then wipes the blackboard, which effectively solves the inconvenient use of short stature and sore wrists when used for a long time. The problem

Method used

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  • Telescopic blackboard eraser

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Embodiment Construction

[0013] The present invention provides a retractable blackboard eraser. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] see figure 1 , which is a structural schematic diagram of the retractable blackboard eraser provided by the present invention. Such as figure 1 As shown, the telescopic blackboard eraser includes a wiping head 1 and a telescopic rod 2, the wiping head 1 and the telescopic rod 2 are connected by a universal joint, and the wiping head can rotate at any angle on the blackboard plane.

[0015] Of course, during specific implementation, the telescopic rod 2 is equipped with a first spring, and the tail of the telescopic rod 2 h...

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PUM

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Abstract

The invention discloses a telescopic blackboard eraser, comprising an eraser head and a telescopic rod, wherein the eraser head and the telescopic rod are connected by a universal joint; the eraser head can rotate on a panel of a blackboard at any angle. According to the telescopic blackboard eraser, the task for wiping the blackboard can be finished without too much strength; the telescopic blackboard eraser is a great progress in the field of teaching tools; the problems that the short is inconvenient to use the blackboard eraser and the wrist is sore when a user uses the blackboard eraser for a long time are effectively solved.

Description

technical field [0001] The invention relates to teaching tools, in particular to a retractable blackboard eraser. Background technique [0002] Blackboard eraser is a kind of office equipment, which can be seen almost everywhere in various schools. Most of the existing blackboard erasers are an independent individual. wipe off. However, in practice, it often happens that primary school students or people of short stature, due to height restrictions, usually have places that cannot be reached by hand when wiping the blackboard, causing inconvenience; moreover, using a traditional blackboard eraser to wipe If you spend a long time on the blackboard, you will feel numbness and soreness in your wrists and arms. It can be seen that the traditional blackboard eraser has a lot of defects. [0003] Thereby prior art still needs to improve and improve. Contents of the invention [0004] In view of the deficiencies in the prior art above, the purpose of the present invention is ...

Claims

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Application Information

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IPC IPC(8): B43L21/04
Inventor 赵芷慧
Owner SHENZHEN CITY FUTIAN DISTRICT SCI & TECH EDUCATION ASSOC FOR JUVENILES