CN201456779U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN201456779U CN201456779U CN2009200870485U CN200920087048U CN201456779U CN 201456779 U CN201456779 U CN 201456779U CN 2009200870485 U CN2009200870485 U CN 2009200870485U CN 200920087048 U CN200920087048 U CN 200920087048U CN 201456779 U CN201456779 U CN 201456779U
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- CN
- China
- Prior art keywords
- compasses
- arm
- compass
- utility
- model
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model provides teaching compasses, which comprise a compass grab handle and compass arms, wherein a chute is formed at the middle lower end of a fixing and supporting compass arm of the compasses, a fixed supporting leg is arranged in the chute, and a fastening screw is arranged on the fixed supporting leg. The retractable compasses provided by the utility model have the advantages that the lengths of the compass arms can be optionally adjusted, thereby achieving wider application range and more convenient use and carrying of the compasses.
Description
Technical field
The utility model relates to a kind of compasses, especially a kind of educational compasses.
Background technology
Existing educational compasses, when teacher maps on blackboard, will be by a nail support fixation of compasses arm bottom, but because the blackboard surface is very smooth, a nail is easy to skid, and uses difficulty very, chalk length in the chalk clamping tube of another compasses arm bottom can't continue to use once shortening, need renew chalk again, this chalk head that has not had is thrown away, and is easy to cause waste.
Summary of the invention
The utility model provides a kind of educational compasses, and the waste of chalk is avoided causing in location when being convenient to map, and the use length that can regulate chalk.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows: educational compasses, the adjusting nut that comprises compasses arm and compasses arm top, it is characterized in that: the bottom of the compasses arm that play fixed supporting role in the described compasses is provided with sucker, and the chalk clamping tube of another compasses arm bottom is provided with adjusting nut.
To improvement of the technical scheme: the top of described compasses arm is provided with lever.
Beneficial effect:
Use scalable compasses described in the utility model, the compasses arm can freely be adjusted length, makes that the use face of compasses is wider, and use is carried convenient.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Educational compasses as shown in Figure 1, the adjusting nut 3 that comprises compasses arm 1,2 and compasses arm top, play fixed supporting role in the described compasses bottom of compasses arm 1 is provided with sucker 4, and the chalk clamping tube 5 of another compasses arm 2 bottoms is provided with adjusting nut 6, and the top of compasses arm 1,2 is provided with lever 7.
During use, unclamp trip bolt, the fixed supporting leg of pulling in the chute, adjust to suitable position after, tighten trip bolt and get final product, unclamp trip bolt after using up, fixed supporting leg pushed back get final product.
Claims (2)
1. educational compasses comprises the adjusting nut on compasses arm and compasses arm top, and it is characterized in that: the bottom of the compasses arm that play fixed supporting role in the described compasses is provided with sucker, and the chalk clamping tube of another compasses arm bottom is provided with adjusting nut.
2. educational compasses according to claim 1 is characterized in that: the top of described compasses arm is provided with lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200870485U CN201456779U (en) | 2009-06-30 | 2009-06-30 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200870485U CN201456779U (en) | 2009-06-30 | 2009-06-30 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201456779U true CN201456779U (en) | 2010-05-12 |
Family
ID=42384133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200870485U Expired - Fee Related CN201456779U (en) | 2009-06-30 | 2009-06-30 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201456779U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529526A (en) * | 2012-03-17 | 2012-07-04 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN105437832A (en) * | 2015-12-11 | 2016-03-30 | 苏州市启扬商贸有限公司 | Leg-height-adjustable compasses |
| CN105459692A (en) * | 2015-12-11 | 2016-04-06 | 苏州市启扬商贸有限公司 | Stretchable compasses |
| CN105522854A (en) * | 2016-01-25 | 2016-04-27 | 信阳农林学院 | Teaching bow compass with length-variable support leg |
-
2009
- 2009-06-30 CN CN2009200870485U patent/CN201456779U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529526A (en) * | 2012-03-17 | 2012-07-04 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN102529526B (en) * | 2012-03-17 | 2014-11-12 | 孙友方 | Anti-slip and energy-saving teaching compass |
| CN105437832A (en) * | 2015-12-11 | 2016-03-30 | 苏州市启扬商贸有限公司 | Leg-height-adjustable compasses |
| CN105459692A (en) * | 2015-12-11 | 2016-04-06 | 苏州市启扬商贸有限公司 | Stretchable compasses |
| CN105522854A (en) * | 2016-01-25 | 2016-04-27 | 信阳农林学院 | Teaching bow compass with length-variable support leg |
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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: 20100512 Termination date: 20100630 |