CN201721204U - 伸缩圆规 - Google Patents

伸缩圆规 Download PDF

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Publication number
CN201721204U
CN201721204U CN2010201838992U CN201020183899U CN201721204U CN 201721204 U CN201721204 U CN 201721204U CN 2010201838992 U CN2010201838992 U CN 2010201838992U CN 201020183899 U CN201020183899 U CN 201020183899U CN 201721204 U CN201721204 U CN 201721204U
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compasses
telescopic rod
utility
model
expansion link
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CN2010201838992U
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王思雯
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SONGJIANG DISTRICT JINGSI PRIMARY SCHOOL
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SONGJIANG DISTRICT JINGSI PRIMARY SCHOOL
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Abstract

本实用新型公开了一种伸缩圆规,包括手柄、转动轴、圆规腿、针头和伸缩杆,所述伸缩杆一端连接在转动轴上,另一端安插连接一根圆规腿,所述圆规腿上设有半球形凸起,所述伸缩杆上设有与所述凸起对应的圆孔。本实用新型的圆规腿可以沿伸缩杆直接拉出,根据实际需要画出足够半径的圆好;也可以缩进,减小圆规的长度方便携带,有结构简单、使用方便、易携带的优点。

Description

伸缩圆规
技术领域
本实用新型涉及一种圆规。
背景技术
学生在日常学习中经常会遇到这样的情况:圆规不够长,画不到足够长的半径的圆,但是买比较长的圆规的时候,在存放的时候也会占很大的空间,这样携带就非常不便了。
发明内容
为了解决上述问题,本实用新型提供了一种伸缩圆规,可以画出比普通圆规更大尺寸的圆。
一种伸缩圆规,包括手柄、转动轴、圆规腿、针头和伸缩杆,所述伸缩杆一端连接在转动轴上,另一端安插连接一根圆规腿,所述圆规腿上设有半球形凸起,所述伸缩杆上设有与所述凸起对应的圆孔;
所述相邻凸起之间的距离与所述相邻圆孔之间的距离相等。
本实用新型的有益效果为:可以画出比普通圆规更大尺寸的圆,结构简单、使用方便、易携带。
附图说明
图1为本实用新型的结构示意图
具体实施方式
如图1所示为本实用新型的结构示意图,一种伸缩圆规,包括手柄、针头、转动轴1、圆规腿3和伸缩杆2,所述伸缩杆2一端连接在转动轴1上,另一端安插连接一根圆规腿3,所述圆规腿3上设有半球形凸起5,所述伸缩杆2上设有与所述凸起5对应的圆孔4。
上述的相邻凸起5之间的距离与所述相邻圆孔4之间的距离相等。这样由于凸起5和圆孔4之间的相互配合,凸起5通过圆孔4来固定要画的圆的半径大小。在存放圆规时,直接将圆规腿3用力推入伸缩杆2中,很大程度上减少了圆规整体的长度方便存放;在使用时,则只需要用力从伸缩杆2中拉出圆规腿3,就可以画出比普通圆规更大半径的圆。

Claims (2)

1.一种伸缩圆规,包括手柄、转动轴、圆规腿和针头,其特征在于,还包括伸缩杆,所述伸缩杆一端连接在转动轴上,另一端安插连接一根圆规腿,所述圆规腿上设有半球形凸起,所述伸缩杆上设有与所述凸起对应的圆孔。
2.如权利要求1所述的伸缩圆规,其特征在于,所述相邻凸起之间的距离与所述相邻圆孔之间的距离相等。
CN2010201838992U 2010-04-29 2010-04-29 伸缩圆规 Expired - Fee Related CN201721204U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201838992U CN201721204U (zh) 2010-04-29 2010-04-29 伸缩圆规

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201838992U CN201721204U (zh) 2010-04-29 2010-04-29 伸缩圆规

Publications (1)

Publication Number Publication Date
CN201721204U true CN201721204U (zh) 2011-01-26

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CN2010201838992U Expired - Fee Related CN201721204U (zh) 2010-04-29 2010-04-29 伸缩圆规

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CN (1) CN201721204U (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108188477A (zh) * 2017-12-30 2018-06-22 郑州游爱网络技术有限公司 一种圆规性切割锯

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108188477A (zh) * 2017-12-30 2018-06-22 郑州游爱网络技术有限公司 一种圆规性切割锯

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C14 Grant of patent or utility model
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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110126

Termination date: 20110429