CN103204020A - Round ruler - Google Patents

Round ruler Download PDF

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Publication number
CN103204020A
CN103204020A CN2013101244884A CN201310124488A CN103204020A CN 103204020 A CN103204020 A CN 103204020A CN 2013101244884 A CN2013101244884 A CN 2013101244884A CN 201310124488 A CN201310124488 A CN 201310124488A CN 103204020 A CN103204020 A CN 103204020A
Authority
CN
China
Prior art keywords
frame
round
cross frame
cross
pointer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013101244884A
Other languages
Chinese (zh)
Inventor
张汉兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN2013101244884A priority Critical patent/CN103204020A/en
Publication of CN103204020A publication Critical patent/CN103204020A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a round ruler comprising a round frame, a cross frame and an indicator. The round frame and the cross frame are integrated. A connecting post is arranged at the center of the cross frame. The cross frame and the indicator are in key joint through the connecting post. The vertical projection of a pinpoint of the indicator to the round frame just falls on the inner frame line of the round frame. Scales are marked on the round frame. The round frame can be used for drawing circles. Due to the joint of the cross frame and the indicator, the round ruler can be used as an angel gauge. The cross frame can be used for drawing auxiliary lines. The indicator just points to the inner side of the round frame, so that errors can be reduced during angle measuring.

Description

The circle chi
Technical field
The present invention relates to a kind of ruler, relate in particular to a kind of round round chi of drawing.
Background technology
During the doing mathematics operation, relate in particular to round big topic, should remove compasses and draw circle, remove the protractor measuring angle again, remove ruler and draw boost line, very inconvenient.
Summary of the invention
The purpose of this invention is to provide a kind of round chi, the function of can possess the picture circle simultaneously, measuring angle and the picture straight line is provided.
According to an aspect of the present invention, a kind of round chi is provided, formed by circle frame, cross frame and pointer, circle frame and cross frame constitute an integral body, the center of cross frame is provided with a joint pin, the cross frame realizes that by joint pin key is connected with pointer, and the needle point of pointer just in time drops on the inside casing line of round frame the upright projection of circle frame, and the circle frame is marked with scale.
Its beneficial effect is, the circle frame can provide the picture circle, and being connected of cross frame and pointer makes it can be used as protractor usefulness, and the cross frame can be used for the picture boost line, and pointer just in time points to round frame inboard, reduces error at the Shi Gengneng that takes measurement of an angle like this.
In some embodiments, the material of justifying frame, cross frame, pointer and joint pin is transparent material.
Its beneficial effect is that the round chi of transparent material especially takes measurement of an angle in use, just can be more accurate.
Description of drawings
Fig. 1 is the overall schematic of the round chi of an embodiment of the present invention;
Fig. 2 is the structural representation of the joint pin part of Fig. 1.
The specific embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
Fig. 1 has schematically shown the round chi according to one embodiment of the present invention.
As shown in Figure 1, the circle chi mainly is made up of circle frame 1, cross frame 2 and pointer 3, and circle frame 1 and cross frame 2 constitute an integral body.Circle frame 1 is identical with the width of cross frame 2, and circle is decorated with 0~360 ° scale on the frame 1, and cross frame 2 is positive crosses, and symmetry is decorated with two straight lines on cross frame 2 broken lines up and down, 0 °, 90 °, 180 ° and 270 ° of two aligned circle frames 1.
The central point of cross frame 2 is provided with a joint pin 4, and in conjunction with Fig. 2, Fig. 2 is the structural representation of joint pin 4 parts, and on the face of joint pin 4 perpendicular to cross frame 2, joint pin 4 is a cylinder, and its level cross-sectionn is a concentric circles with circle frame 1.Pointer 3 links together by joint pin 4 and cross frame 2, the height of pointer 3 equates with joint pin 4, the end of pointer 3 has one and joint pin 4 equal-sized circular holes, circular hole pointer 3 on broken line, when the syringe needle of pointer 3 is to the scale on the director circle frame 1 like this, just in time be the center of circle from circle frame 1, the standard that could survey like this.The material of whole round chi all is transparent simultaneously, is more convenient for measuring.
Cross frame 2 itself can be used for some boost lines on the picture straight line, particularly mathematics, and circle frame 1 housing can be used for the picture circle.

Claims (2)

1. justify chi, it is characterized in that, formed by circle frame (1), cross frame (2) and pointer (3), described round frame (1) and described cross frame (2) constitute an integral body, the center of described cross frame (2) is provided with a joint pin (4), described cross frame (2) realizes that by described joint pin (4) key is connected with described pointer (3), and the needle point of described pointer (3) just in time drops on the inside casing line of described round frame (1) the upright projection of described round frame (1), and described round frame (1) is marked with scale.
2. according to claim 1 described round chi, it is characterized in that the material of described round frame (1), cross frame (2), pointer (3) and joint pin (4) is transparent material.
CN2013101244884A 2013-04-10 2013-04-10 Round ruler Pending CN103204020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013101244884A CN103204020A (en) 2013-04-10 2013-04-10 Round ruler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013101244884A CN103204020A (en) 2013-04-10 2013-04-10 Round ruler

Publications (1)

Publication Number Publication Date
CN103204020A true CN103204020A (en) 2013-07-17

Family

ID=48751510

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013101244884A Pending CN103204020A (en) 2013-04-10 2013-04-10 Round ruler

Country Status (1)

Country Link
CN (1) CN103204020A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2252716Y (en) * 1996-04-18 1997-04-23 马顺 Position plotting instrument
CN2286677Y (en) * 1997-01-16 1998-07-29 李跃建 Angle gauge ruler drawing board
CN101352987A (en) * 2008-09-08 2009-01-28 柯阳 Drawing instrument
CN201385519Y (en) * 2009-04-13 2010-01-20 邹彩霞 Multifunctional measurer
CN201530227U (en) * 2009-06-16 2010-07-21 绿友机械集团股份有限公司 Device for measuring angles and capable of achieving functions of straight ruler
KR20100089684A (en) * 2009-02-04 2010-08-12 임기복 Circle board compass
CN202189488U (en) * 2011-07-28 2012-04-11 韩生华 Multifunctional learning ruler
CN203198515U (en) * 2013-04-10 2013-09-18 张汉兵 Circle ruler

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2252716Y (en) * 1996-04-18 1997-04-23 马顺 Position plotting instrument
CN2286677Y (en) * 1997-01-16 1998-07-29 李跃建 Angle gauge ruler drawing board
CN101352987A (en) * 2008-09-08 2009-01-28 柯阳 Drawing instrument
KR20100089684A (en) * 2009-02-04 2010-08-12 임기복 Circle board compass
CN201385519Y (en) * 2009-04-13 2010-01-20 邹彩霞 Multifunctional measurer
CN201530227U (en) * 2009-06-16 2010-07-21 绿友机械集团股份有限公司 Device for measuring angles and capable of achieving functions of straight ruler
CN202189488U (en) * 2011-07-28 2012-04-11 韩生华 Multifunctional learning ruler
CN203198515U (en) * 2013-04-10 2013-09-18 张汉兵 Circle ruler

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C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130717