CN201637369U - Circumference measuring scale - Google Patents
Circumference measuring scale Download PDFInfo
- Publication number
- CN201637369U CN201637369U CN2009201786482U CN200920178648U CN201637369U CN 201637369 U CN201637369 U CN 201637369U CN 2009201786482 U CN2009201786482 U CN 2009201786482U CN 200920178648 U CN200920178648 U CN 200920178648U CN 201637369 U CN201637369 U CN 201637369U
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- CN
- China
- Prior art keywords
- circumference
- measuring scale
- circumference measuring
- scale
- measuring
- 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.)
- Expired - Fee Related
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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model relates to a circumference measuring scale, belonging to a primary school teaching apparatus. The circumference measuring scale solves the problems that circumference measuring wastes time, is not accurate and visual and is difficultly solved in the teaching process of the section 'Circumference Calculation' in primary school mathematics. The adopted method is that the circumference and the scale add toothed structures, and the circumference measuring scale is mainly used for simply, visually and accurately measuring the circumference.
Description
Technical field:
The utility model belongs to the primary school math teaching apparatus.
Background technology:
In primary school mathematics " circumference calculating " chapters and sections teaching process, because there is not special-purpose teaching aid, it is long that circumference is measured holding time, measures inaccurately, explains not intuitively, and the student understands difficulty.
Summary of the invention:
The purpose of this utility model is in order to solve in " circumference calculating " teaching process, and it is not directly perceived to impart knowledge to students, and the student understands difficulty, and it is long that circumference is measured holding time, the problem that measuring error is big.The utility model is designed to zigzag with the disk periphery, zigzag track that is complementary with it of rule next door design, can effectively prevent to produce when disk from rolling on ruler and slide, thereby the teaching aid that a kind of energy is directly perceived, accurate, save time, measure easily circumference is provided, allows the student be easy to understand and to grasp the content of courses of " circumference calculating ".
Description of drawings:
Accompanying drawing is a kind of structural representation of the present utility model, and 1 is the zigzag disk in the accompanying drawing, the 2nd, and the ruler of band saw dentation track.
Embodiment:
During measurement 0 on 0 on the zigzag disk 1 ruler 2 with band saw dentation track is alignd, zigzag disk 1 rolls a week on the ruler 2 of band saw dentation track, on the zigzag disk 10 the reading on the ruler 2 of corresponding band saw dentation track promptly be the girth of zigzag disk 1.
Claims (1)
1. the circumference dip stick is characterized in that, it has zigzag disk (1), and the ruler (2) of band saw dentation track is common to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201786482U CN201637369U (en) | 2009-09-26 | 2009-09-26 | Circumference measuring scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201786482U CN201637369U (en) | 2009-09-26 | 2009-09-26 | Circumference measuring scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637369U true CN201637369U (en) | 2010-11-17 |
Family
ID=43081869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201786482U Expired - Fee Related CN201637369U (en) | 2009-09-26 | 2009-09-26 | Circumference measuring scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637369U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036673A (en) * | 2013-03-07 | 2014-09-10 | 周维保 | Circle circumference formula derivation instrument |
| CN104537928A (en) * | 2014-12-31 | 2015-04-22 | 周维保 | Circle perimeter formula teaching presentation device |
| CN106097839A (en) * | 2016-03-10 | 2016-11-09 | 陈绍东 | The girth of a kind of circle and radius relationship apparatus for demonstrating |
-
2009
- 2009-09-26 CN CN2009201786482U patent/CN201637369U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036673A (en) * | 2013-03-07 | 2014-09-10 | 周维保 | Circle circumference formula derivation instrument |
| CN104537928A (en) * | 2014-12-31 | 2015-04-22 | 周维保 | Circle perimeter formula teaching presentation device |
| CN106097839A (en) * | 2016-03-10 | 2016-11-09 | 陈绍东 | The girth of a kind of circle and radius relationship apparatus for demonstrating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20110926 |