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Telescopic blackboard eraser for teaching

A blackboard eraser and body technology, applied in the field of teaching tools, can solve problems such as difficulties, time-consuming and laborious, and achieve the effects of not easy to freeze hands, reducing use costs, and improving user experience.

Inactive Publication Date: 2018-05-11
中国石油广安希望学校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to personal habits and different writing heights when wiping the blackboard, existing blackboard erasers are often more difficult and time-consuming and laborious when erasing traces at higher positions on the blackboard.

Method used

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  • Telescopic blackboard eraser for teaching
  • Telescopic blackboard eraser for teaching

Examples

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Embodiment Construction

[0012] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] like figure 1 As shown, a blackboard eraser provided by the present invention includes a blackboard eraser body 1, on which a bristle 2 is arranged, the shape and size of the blackboard eraser body 1 are not limited, and the material of the bristle 2 is also not limited. , The length of the bristles 2 is preferably 1-2 cm.

[0014] Also includes a handle 3, the blackboard eraser body 1 is provided with a blind hole 4, one end of the handle 3 extends into the blind hole 4, the other end is located outside the blind hole 4, the blackboard eraser body 1 is provided with Locking bolt 5, the handle 3 is movably connected with the blackboard eraser body 1 through the locking bolt 5, that is, by changing the position of the handle 3 in the blind hole 4, the purpose of adjusting the length of the blackboard eraser is realized. The handle 3 ...

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Abstract

The invention relates to the technical field of a teaching appliance, in particular to a telescopic blackboard eraser for teaching. The telescopic blackboard eraser comprises a blackboard eraser body;the blackboard eraser body is provided with bristles; the telescopic blackboard eraser also comprises a handle; the blackboard eraser body is provided with a blind hole; one end of the handle extendsinto the blind hole; the other end of the handle is positioned outside the blind hole; the blackboard eraser body is provided with a locking bolt; the handle is movably connected with the blackboardbody through the locking bolt; the handle is externally sleeved with a hand protective sleeve; and a heating device is arranged inside the hand protective sleeve. The telescopic blackboard eraser is simple in structure, lowers the using cost and is easy to popularize and quite good in practicability. By adjusting the length of the blackboard eraser, words on the blackboard can be cleanly and rapidly wiped, and time and efforts are saved. By arranging the heating device, the blackboard eraser can be heated when air temperature is relatively low, so a hand of a user is difficult to feel cold, and the user experience is greatly improved.

Description

technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a retractable blackboard eraser for teaching. Background technique [0002] The teaching tools used at home and abroad are still based on traditional blackboard chalk at present. When in use, hold the blackboard eraser with your hand and move back and forth after touching the blackboard, thereby erasing the words on the blackboard. But because personal habit and writing height are different when wiping blackboard, existing blackboard eraser is often more difficult when erasing the mark of higher position on blackboard, wastes time and effort. Contents of the invention [0003] The object of the present invention is to provide a retractable blackboard eraser for teaching with simple structure, convenient operation and hand warming function. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: a retractable black...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/04
CPCB43L21/04
Inventor 何海鸥
Owner 中国石油广安希望学校
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