CN201516767U - Compasses dedicated for teaching - Google Patents
Compasses dedicated for teaching Download PDFInfo
- Publication number
- CN201516767U CN201516767U CN2009201290006U CN200920129000U CN201516767U CN 201516767 U CN201516767 U CN 201516767U CN 2009201290006 U CN2009201290006 U CN 2009201290006U CN 200920129000 U CN200920129000 U CN 200920129000U CN 201516767 U CN201516767 U CN 201516767U
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- CN
- China
- Prior art keywords
- compasses
- center
- circle
- sucker
- teaching
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- 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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Abstract
The utility model discloses compasses dedicated for teaching. The compasses comprise a chalk head, a circumference leg, a hinge, a circle center leg and a sucking disc, and are characterized in that a circle center contact is formed at the center in the sucking disc, and the sucking disc is connected with the lower end of the circle center leg through a universal joint. The sucking disc is made of transparent rubber. The compasses dedicated for teaching have the advantages of easy and accurate circle center finding by the sucking disc, simple structure and convenient use, thereby having the popularization value.
Description
Technical field
The utility model relates to compasses, more specifically relates to a kind of teaching special compasses.
Background technology
Compasses are very universal as a kind of drawing tools, and it mainly is made up of circumference pin and center of circle pin, and the upper end hinge of the upper end of circumference pin and center of circle pin links together, and its lower end forms foldable splayed configuration.In existing a kind of sucked type educational compasses, the lower end of circumference pin is connected with the chalk head, and the lower end of center of circle pin is provided with a cupule head, and cupule head is made with colored rubber, because the cupule head diameter is bigger, and cupule head is opaque, then causes and looks for the center of circle inaccurate, when making some figures, precision is not high, be difficult to satisfy the needs of teaching,, have much room for improvement for this reason.
Summary of the invention
The purpose of this utility model: look for the problem of center of circle difficulty in order to solve existing sucked type educational compasses, and a kind of teaching special compasses is provided.
The technical solution of the utility model is: a kind of teaching special compasses, comprise the chalk head, and the circumference pin, hinge, center of circle pin, sucker is characterized in that, and the central authorities in sucker are provided with contact, a center of circle, and sucker is connected by the lower end of universal joint with center of circle pin.
Described sucker is made by transparent rubber
Using method of the present utility model: when teaching special compasses of the present utility model is drawn, see through transparent sucker, the center of circle that center of circle contact alignment is searched out, press down sucker, sucker is fixed, open the circumference pin, can arbitrarily draw circumference or circular arc, universal joint makes center of circle bottoms around the contact, the center of circle of sucker and rotate.
The beneficial effects of the utility model: teaching special compasses of the present utility model, it is very convenient, accurate, simple in structure, easy to use that its sucker is sought the center of circle, has promotional value.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing among Fig. 1.
The specific embodiment
The utility model is described in further detail below by embodiment.
As shown in Figure 1 and Figure 2, a kind of teaching special compasses comprises chalk head 1, circumference pin 2, and hinge 3, center of circle pin 4, sucker 6 is characterized in that, and the central authorities in sucker 6 are provided with contact, a center of circle 7, and sucker 6 is connected with the lower end of center of circle pin 4 by universal joint 5.Described sucker 6 is made by transparent rubber.
Claims (2)
1. a teaching special compasses comprises chalk head (1), circumference pin (2), hinge (3), center of circle pin (4), sucker (6), it is characterized in that the central authorities in sucker (6) are provided with contact, a center of circle (7), sucker (6) is connected with the lower end of center of circle pin (4) by universal joint (5).
2. by the described teaching special compasses of claim 1, it is characterized in that described sucker (6) is made by transparent rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201290006U CN201516767U (en) | 2009-09-24 | 2009-09-24 | Compasses dedicated for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201290006U CN201516767U (en) | 2009-09-24 | 2009-09-24 | Compasses dedicated for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201516767U true CN201516767U (en) | 2010-06-30 |
Family
ID=42497483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201290006U Expired - Fee Related CN201516767U (en) | 2009-09-24 | 2009-09-24 | Compasses dedicated for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201516767U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105383213A (en) * | 2015-12-11 | 2016-03-09 | 苏州市启扬商贸有限公司 | Tripod compass |
| CN105479986A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Compasses |
| CN105479987A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Three-legged compasses |
| CN105479988A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Three-legged compasses |
-
2009
- 2009-09-24 CN CN2009201290006U patent/CN201516767U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105383213A (en) * | 2015-12-11 | 2016-03-09 | 苏州市启扬商贸有限公司 | Tripod compass |
| CN105479986A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Compasses |
| CN105479987A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Three-legged compasses |
| CN105479988A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Three-legged compasses |
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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: 20100630 Termination date: 20120924 |