CN202727757U - Combined geometric teaching aid - Google Patents
Combined geometric teaching aid Download PDFInfo
- Publication number
- CN202727757U CN202727757U CN 201220332873 CN201220332873U CN202727757U CN 202727757 U CN202727757 U CN 202727757U CN 201220332873 CN201220332873 CN 201220332873 CN 201220332873 U CN201220332873 U CN 201220332873U CN 202727757 U CN202727757 U CN 202727757U
- Authority
- CN
- China
- Prior art keywords
- circle
- center
- teaching aid
- rod
- chalk
- 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 discloses a combined geometric teaching aid which is characterized in that one end of a circle center fixing rod is articulated with one end of a circle drawing rod by a rotating shaft; a circle center fixing pin is arranged at the other end the circle center fixing rod; a chalk fixing frame is arranged at the other end of the circle drawing rod; upper sides of the circle center fixing pin and the chalk fixing frame are connected with a radius regulating rod by fixing shafts; and a plurality of connecting holes are formed in the radius regulating rod. The teaching aid can be used as a pair of compasses and a set square, as well as a ruler for marking.
Description
Technical field
The utility model relates to a kind of teaching aid, is how much teaching aids of a kind of combined type specifically.
Background technology
Ruler, compasses and set square are the necessary educational aids that the mathematics teacher uses when mapping at school.Existing ruler, compasses and set square mostly are single-piece and independently use, be everlasting be finished a kind of teaching aid after, get again another kind of teaching aid and use, such teaching aid is in use very inconvenient, and is not easy to carry.
Summary of the invention
The purpose of this utility model is to provide a kind of combined type how much teaching aids.
To achieve these goals, one end of the center of circle of the present utility model fixed bar and picture round bar is hinged by rotating shaft, the other end at center of circle fixed bar is provided with center of circle locking pin, be provided with the chalk geometrical clamp at the other end of drawing round bar, upside at center of circle locking pin and chalk fixed mount is connected with the radius adjusting rod by fixed axis, and a plurality of connecting holes are located on the radius adjusting rod.
By above setting, the utility model both can be used as compasses and set square and had used, and can be used as again the ruler line and used, and had realized multi-functionally, was convenient to the teacher and carried and use.
Description of drawings
Now by reference to the accompanying drawings the utility model is described further.
Fig. 1 is structural representation of the present utility model.
Among the figure: 1, center of circle fixed bar, 2, draw round bar, 3, center of circle locking pin, 4, the chalk geometrical clamp, 5, fixed axis, 6, the radius adjusting rod, 7, connecting hole.
The specific embodiment
As shown in Figure 1, one end of the center of circle of the present utility model fixed bar 1 and picture round bar 2 is hinged by rotating shaft, the other end at center of circle fixed bar 1 is provided with center of circle locking pin 3, be provided with chalk geometrical clamp 4 at the other end of drawing round bar 2, upside at center of circle locking pin 3 and chalk fixed mount 4 is connected with radius adjusting rod 6 by fixed axis 5, and a plurality of connecting holes 7 are located on the radius adjusting rod 6.By above setting, the connecting hole 7 on the radius adjusting rod 6 of the present utility model matches with fixed axis 5 can form set square, can realize again the angle adjustment between center of circle fixed bar 1 and the picture round bar 2, has also realized drawing the adjustment of radius of circle size simultaneously.
Claims (1)
1. combined type how much teaching aids, it is characterized in that: an end of center of circle fixed bar and picture round bar is hinged by rotating shaft, the other end at center of circle fixed bar is provided with center of circle locking pin, be provided with the chalk fixed mount at the other end of drawing round bar, upside at center of circle locking pin and chalk fixed mount is connected with the radius adjusting rod by fixed axis, and a plurality of connecting holes are located on the radius adjusting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332873 CN202727757U (en) | 2012-07-10 | 2012-07-10 | Combined geometric teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332873 CN202727757U (en) | 2012-07-10 | 2012-07-10 | Combined geometric teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202727757U true CN202727757U (en) | 2013-02-13 |
Family
ID=47653495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332873 Expired - Fee Related CN202727757U (en) | 2012-07-10 | 2012-07-10 | Combined geometric teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202727757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106739682A (en) * | 2015-11-25 | 2017-05-31 | 上海市格致中学 | A kind of compasses being convenient for measuring |
-
2012
- 2012-07-10 CN CN 201220332873 patent/CN202727757U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106739682A (en) * | 2015-11-25 | 2017-05-31 | 上海市格致中学 | A kind of compasses being convenient for measuring |
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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: 20130213 Termination date: 20130710 |