CN202911390U - Extensible compasses - Google Patents
Extensible compasses Download PDFInfo
- Publication number
- CN202911390U CN202911390U CN 201220618185 CN201220618185U CN202911390U CN 202911390 U CN202911390 U CN 202911390U CN 201220618185 CN201220618185 CN 201220618185 CN 201220618185 U CN201220618185 U CN 201220618185U CN 202911390 U CN202911390 U CN 202911390U
- Authority
- CN
- China
- Prior art keywords
- leg
- compasses
- extensible
- rule
- retractive
- 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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Abstract
The utility model discloses a pair of extensible compasses. The pair of extensible compasses comprises a rotating block, a first compasses leg and a second compasses leg. The first compasses leg and the second compasses leg are hinged on the rotating block. A first extensible leg is inserted into the lower portion of the first compasses leg. A second extensible leg is inserted into the lower portion of the second compasses leg. A first adjusting knob is arranged between the first compasses leg and the first extensible leg. A second adjusting knob is arranged between the second compasses leg and the second extensible leg. A supporting foot is fixed at the bottom of the first extensible leg. A chalk is fixed at the bottom of the second extensible leg. A hanging hole is formed on the top of the rotating block. The pair of extensible compasses has the advantages of being simple in structure, increasing a radius range of a drawn circle, being capable of well satisfying requirements of teaching, and facilitating hanging because the hanging hole is formed on the top of the rotating block.
Description
Technical field
The utility model relates to a kind of teaching apparatus for mathematics, particularly a kind of flexible compasses.
Background technology
At present, used compasses in the mathematical education practice, the length of its rule leg is fixed, and is non-telescoping, thereby its radius of a circle scope that can draw is less, can not satisfy the needs of teaching fully.
Summary of the invention
Problem to be solved in the utility model is: a kind of simple in structure, flexible compasses that can greatly increase the radius of institute's draw circles are provided.
In order to solve the problems of the technologies described above, flexible compasses of the present utility model, comprise spill spin block, the first rule leg and the second rule leg, described the first rule leg and the second rule leg are hinged on the spill spin block, the below of described the first rule leg is inserted with the first Retractive leg, the below of described the second rule leg is inserted with the second Retractive leg, be provided with the first adjusting knob between described the first rule leg and the first Retractive leg, be provided with the second adjusting knob between the second rule leg and the second Retractive leg, the bottom of described the first Retractive leg is fixed with feet, and the bottom of described the second Retractive leg is fixed with chalk.
For the ease of suspension, flexible compasses of the present utility model, the top of described spill spin block is provided with a hanging hole.
The beneficial effect that the utility model is obtained is: (1) is simple in structure; The below of (2) first rule legs is inserted with the first Retractive leg, the below of described the second rule leg is inserted with the second Retractive leg, be provided with the first adjusting knob between described the first rule leg and the first Retractive leg, be provided with the second adjusting knob between the second rule leg and the second Retractive leg, thereby can adjust the length that the first Retractive leg and the second Retractive leg stretch out in the first rule leg and the second rule leg, greatly increase the radius of institute's draw circles, better meet the needs of teaching; (3) top of spill spin block is provided with a hanging hole, thereby is convenient to hang.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1, spill spin block, the 2, second rule leg, the 3, second adjusting knob, the 4, second Retractive leg, 5, chalk,
6, the first rule leg, the 7, first adjusting knob, the 8, first Retractive leg, 9, feet, 10, hanging hole.
The specific embodiment
As shown in Figure 1, flexible compasses of the present utility model, comprise spill spin block 1, the first rule leg 6 and the second rule leg 2, described the first rule leg 6 and the second rule leg 2 are hinged on the spill spin block 1, the below of described the first rule leg 6 is inserted with the first Retractive leg 8, the below of described the second rule leg 2 is inserted with the second Retractive leg 4, be provided with the first adjusting knob 7 between described the first rule leg 6 and the first Retractive leg 8, be provided with the second adjusting knob 3 between the second rule leg 2 and the second Retractive leg 4, the bottom of described the first Retractive leg 8 is fixed with feet 9, and the bottom of described the second Retractive leg 4 is fixed with chalk 5; The top of described spill spin block 1 is provided with a hanging hole 10.
Flexible compasses of the present utility model, unclamp after the first adjusting knob 7 and the second adjusting knob 3, can adjust the length that the first Retractive leg 8 and the second Retractive leg 4 stretch out in the first rule leg 6 and the second rule leg 2, thereby distance between feet 9 and the spill spin block 1 and the distance between chalk 5 and the spill spin block 1 have been changed, greatly increase the radius of institute's draw circles, better met the needs of teaching.
Flexible compasses of the present utility model, the top of spill spin block 1 are provided with a hanging hole 10, thereby are convenient to hang.
The utility model is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection domain of the present utility model.
Claims (2)
1. flexible compasses, it is characterized in that: comprise spill spin block (1), the first rule leg (6) and the second rule leg (2), described the first rule leg (6) and the second rule legs (2) are hinged on the spill spin block (1), the below of described the first rule legs (6) is inserted with the first Retractive leg (8), the below of described the second rule legs (2) is inserted with the second Retractive leg (4), be provided with the first adjusting knob (7) between described the first rule leg (6) and the first Retractive leg (8), be provided with the second adjusting knob (3) between the second rule leg (2) and the second Retractive leg (4), the bottom of described the first Retractive leg (8) is fixed with feet (9), and the bottom of described the second Retractive leg (4) is fixed with chalk (5).
2. flexible compasses according to claim 1, it is characterized in that: the top of described spill spin block (1) is provided with a hanging hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618185 CN202911390U (en) | 2012-11-13 | 2012-11-13 | Extensible compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618185 CN202911390U (en) | 2012-11-13 | 2012-11-13 | Extensible compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202911390U true CN202911390U (en) | 2013-05-01 |
Family
ID=48159728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618185 Expired - Fee Related CN202911390U (en) | 2012-11-13 | 2012-11-13 | Extensible compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202911390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479985A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Telescoping compasses |
-
2012
- 2012-11-13 CN CN 201220618185 patent/CN202911390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479985A (en) * | 2015-12-11 | 2016-04-13 | 苏州市启扬商贸有限公司 | Telescoping 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: 20130501 Termination date: 20131113 |