Educational compasses

A technology of compass and ruler, applied in the field of teaching compasses, can solve problems such as inconvenience of use, and achieve the effect of simple structure
CN101234572AInactive Publication Date: 2008-08-06SHANGHAI SHANGYIN YANGPU SCHOOL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI SHANGYIN YANGPU SCHOOL
Publication Date
2008-08-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a teaching compass, which comprises a ruler; wherein, one end of the ruler is provided with a turntable; a fixed device used for bonding with a writing plate is arranged on the turntable; the ruler is connected with the turntable by a rotating shaft and can carry out circular motion by taking the rotating shaft center as a circular point; a slide groove and a slide block are arranged on the ruler; the slide block is arranged in the slide of the groove and holes are arranged on the slide block for putting teaching pens. Compared with the traditional compass, the novel teaching compass has a completely different design proposal which has simple structure and a plurality of applications.
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Description

technical field

[0001] The invention relates to a teaching tool, in particular to a teaching compasses. Background technique

[0002] The existing teaching compasses generally include two movable arms, but it is inconvenient to use. Contents of the invention

[0003] The purpose of the invention is to overcome the deficiencies in the prior art and provide a novel teaching compasses.

[0004] The present invention adopts following technical scheme to solve the above technical problems:

[0005] A teaching compasses, including a ruler, wherein, one end of the ruler is provided with a turntable, and the turntable is provided with a fixing device for bonding with a writing board, and the ruler and the turntable are connected via a rotating shaft and can be rotated in a circle at the center of the rotating shaft as a dot. The ruler is provided with a chute and a slide block, the slide block is arranged in the chute, and a hole is arranged on the slide block for placing a teac...

Claims

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