CN105599502A - 不伤黑板的教具圆规 - Google Patents

不伤黑板的教具圆规 Download PDF

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Publication number
CN105599502A
CN105599502A CN201610134395.3A CN201610134395A CN105599502A CN 105599502 A CN105599502 A CN 105599502A CN 201610134395 A CN201610134395 A CN 201610134395A CN 105599502 A CN105599502 A CN 105599502A
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compasses
chalkboard
magnet
teaching aid
fixed
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游婧
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Individual
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Priority to CN201610134395.3A priority Critical patent/CN105599502A/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/02—Compasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L12/00—Means to prevent slippage
    • B43L12/02—Means to prevent slippage magnetic

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Abstract

本发明提供一种不伤黑板的教具圆规，涉及一种教具类技术领域。由圆规、磁铁和固定磁铁组成，其特征是：在圆规固定脚上设置有可旋转磁铁，再设置一与可旋转磁铁相匹配的固定磁铁。使用时，在磁性黑板放上固定磁铁，作图时直接把圆规固定脚放在固定磁铁上即可作图。本发明有益效果是：结构简单、使用方便，不伤黑板效果好。

Description

不伤黑板的教具圆规
技术领域
本发明涉及一种教具类技术领域。
背景技术
目前，公知现有的圆规教具，都是由针脚直接钉在黑板上，在黑板上易留下针眼，虽有专利号为92208261.8的一种教具圆规圆心定位器，是由吸管吸在黑板上，还要用力压住才能吸住黑板，不太方便。不太理想。
发明内容
为了克服上述不足，本发明提供一种不伤黑板的教具圆规，以达到不伤黑板的目的。
本发明解决其技术问题的技术方案是：由圆规、可旋转磁铁和固定磁铁组成的不伤黑板的教具圆规，其特征是：在圆规固定脚上设置有可旋转磁铁，再设置一与可旋转磁铁相匹配的固定磁铁。
使用时，在磁性黑板放上固定磁铁，作图时直接把圆规固定脚放在固定磁铁上即可作图。
本发明有益效果是：结构简单、使用方便，不伤黑板效果好。
附图说明
下面结合附图和实施例对本发明作进一步说明：
图1为本发明结构示意图。
图中1.圆规，2.固定脚，3.可旋转磁铁，4.固定磁铁。
具体实施方式
图中，在圆规1固定脚2上设置有可旋转磁铁3，再设置一与可旋转磁铁相匹配的固定磁铁4。

Claims (1)

1.一种不伤黑板的教具圆规，由圆规、磁铁和固定磁铁组成，其特征是：在圆规(1)固定脚(2)上设置有可旋转磁铁(3)，再设置一与可旋转磁铁相匹配的固定磁铁(4)。
CN201610134395.3A 2016-03-03 2016-03-03 不伤黑板的教具圆规 Pending CN105599502A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610134395.3A CN105599502A (zh) 2016-03-03 2016-03-03 不伤黑板的教具圆规

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610134395.3A CN105599502A (zh) 2016-03-03 2016-03-03 不伤黑板的教具圆规

Publications (1)

Publication Number Publication Date
CN105599502A true CN105599502A (zh) 2016-05-25

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CN201610134395.3A Pending CN105599502A (zh) 2016-03-03 2016-03-03 不伤黑板的教具圆规

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CN (1) CN105599502A (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202080008U (zh) * 2011-05-12 2011-12-21 孙兵民 一种圆规
CN203078071U (zh) * 2012-12-31 2013-07-24 沈世龙 粉笔圆规
CN103317907A (zh) * 2013-06-14 2013-09-25 雷洪炳 一种磁吸圆规
CN104494338A (zh) * 2014-11-24 2015-04-08 张朝殿 磁铁圆规
CN104626827A (zh) * 2015-02-06 2015-05-20 黄利辉 一种磁性多功能几何教具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202080008U (zh) * 2011-05-12 2011-12-21 孙兵民 一种圆规
CN203078071U (zh) * 2012-12-31 2013-07-24 沈世龙 粉笔圆规
CN103317907A (zh) * 2013-06-14 2013-09-25 雷洪炳 一种磁吸圆规
CN104494338A (zh) * 2014-11-24 2015-04-08 张朝殿 磁铁圆规
CN104626827A (zh) * 2015-02-06 2015-05-20 黄利辉 一种磁性多功能几何教具

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Application publication date: 20160525