Chalkboard-friendly teaching aid compasses
A technology of compasses and teaching aids, applied in the field of teaching aids, can solve the problems of easy to leave needle holes and inconvenience, and achieve the effects of simple structure, good effect and convenient use.
Inactive Publication Date: 2016-05-25
游婧
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Problems solved by technology
[0002] At present, the known existing compass teaching aids are all directly nailed on the blackboard by pins, and pinholes are easily left on the blackboard. Although there is a kind of teaching aid compass circle center locator of 92208261.8, which is sucked on the blackboard by a suction pipe, You have to press hard to suck the blackboard, which is not convenient
Method used
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[0010] In the figure, a rotatable magnet 3 is arranged on the fixed foot 2 of the compasses 1, and a fixed magnet 4 matched with the rotatable magnet is arranged.
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The invention provides a pair of chalkboard-friendly teaching aid compasses and relates to the technical field of teaching aids. The chalkboard-friendly teaching aid compasses are composed of compasses, a magnet and a fixed magnet and are characterized in that the rotatable magnet is arranged on a fixed leg of the compasses, and the fixed magnet matching with the rotatable magnet is further provided. When the chalkboard-friendly teaching aid compasses are in use, the fixed magnet is placed on a magnetic chalkboard, and the fixed leg of the compasses is placed directly on the fixed magnet to make graphs. The chalkboard-friendly teaching aid compasses have the advantages of simple structure, convenience of use, chalkboard friendliness and good effect.
Description
technical field [0001] The invention relates to the technical field of teaching aids. Background technique [0002] At present, the known existing compass teaching aids are all directly nailed on the blackboard by pins, and pinholes are easily left on the blackboard. Although there is a kind of teaching aid compass center locator of 92208261.8, which is sucked on the blackboard by a suction pipe, You have to press hard to suck the blackboard, which is not very convenient. Not ideal. Contents of the invention [0003] In order to overcome the above disadvantages, the present invention provides a teaching aid compass that does not damage the blackboard, so as to achieve the purpose of not damaging the blackboard. [0004] The technical solution of the present invention to solve its technical problem is: the teaching aid compass that does not hurt the blackboard is made up of compass, rotatable magnet and fixed magnet, it is characterized in that: be provided with rotatable...
Claims
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IPC IPC(8): B43L9/02B43L12/02
CPCB43L9/02B43L12/02
Inventor 游婧
Owner 游婧