CN201580155U - Cyclograph for teaching - Google Patents
Cyclograph for teaching Download PDFInfo
- Publication number
- CN201580155U CN201580155U CN2010201002124U CN201020100212U CN201580155U CN 201580155 U CN201580155 U CN 201580155U CN 2010201002124 U CN2010201002124 U CN 2010201002124U CN 201020100212 U CN201020100212 U CN 201020100212U CN 201580155 U CN201580155 U CN 201580155U
- Authority
- CN
- China
- Prior art keywords
- teaching
- cyclograph
- circular protractor
- rotation chi
- utility
- 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 relates to a teaching aid, in particular to a cyclograph for teaching, which is mainly formed by a rotating ruler and a circular protractor. The circular protractor is hinged at one end of the rotating ruler through a hinge shaft. A hinge point is coincident with the center of the circle of the circular protractor. A peep hole and a plurality of pen holes are arranged on the rotating ruler. The peep hole is arranged on the rotating ruler at a position corresponding to the scales of the circular protractor. The symmetric center of the peep hole, the symmetric center of the pen holes and the hinge point are arranged in line. Compared with the prior art, the utility model has the advantages of convenient use, accurate drawing and the like.
Description
Technical field
The utility model relates to a kind of teaching aid, and a kind of teaching cyclograph specifically is provided.
Background technology
At present, the circle tool that is applied to teaching process mainly is a compasses for teaching, and its structure is similar to common compasses, just chalk has been fixed on the rotation pin.Its structure is relatively complicated, carries inconvenience, and draws circular arc hour angle degree and can not determine that range of application is single.
Summary of the invention
The utility model is at above-mentioned the deficiencies in the prior art, and a kind of easy to use, accurate teaching cyclograph of drawing is provided.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of teaching cyclograph, mainly constitute by rotation chi and circular protractor, circular protractor is articulated in rotation chi one end by hinge, the center of circle of pin joint and circular protractor coincides, on the rotation chi, have sight vane and some holes, sight vane is positioned at the position of corresponding circular protractor scale on the rotation chi, and the symmetrical centre in the symmetrical centre of sight vane, a hole and pin joint being aligned are provided with.
Be fixed with sucker at hinge one end.
Teaching of the present utility model is compared with prior art with cyclograph, has following beneficial effect highlightedly:
(1) simple in structure, agent structure has only rotation chi and circular protractor two parts, is easy to produce;
(2) can draw the circular arc that angle is determined according to the scale on the circular protractor;
(3) can draw equidistant concentric circles;
(4) sucker is set, draws the difficult slip of circle centre position in the circle process.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model teaching with cyclograph;
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
Provide a most preferred embodiment below:
A kind of teaching mainly is made of rotation chi 1, circular protractor 2 with cyclograph.Circular protractor 2 is articulated in rotation chi 1 one ends by hinge 3, and the center of circle of pin joint and circular protractor 2 coincides.On rotation chi 1, have sight vane 4 and some holes 5.Sight vane 4 is positioned at the position of 1 corresponding circular protractor 2 scales on the rotation chi.The symmetrical centre in the symmetrical centre of sight vane 4, a hole 5 and pin joint being aligned are provided with.Be fixed with sucker 6 in hinge 3 lower ends.
During use, utilize sucker to locate, chalk is inserted in the hole that is fit to, can draw circle or circular arc that the center of circle is determined at home position.
Claims (3)
1. teaching cyclograph, it is characterized in that, mainly constitute by rotation chi and circular protractor, circular protractor is articulated in rotation chi one end by hinge, the center of circle of pin joint and circular protractor coincides, have sight vane and some holes on the rotation chi, sight vane is positioned at the position of corresponding circular protractor scale on the rotation chi, and the symmetrical centre in the symmetrical centre of sight vane, a hole and pin joint being aligned are provided with.
2. teaching cyclograph according to claim 1 is characterized in that, is fixed with sucker at hinge one end.
3. teaching cyclograph according to claim 1 is characterized in that, the hole on the rotation chi equidistantly distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201002124U CN201580155U (en) | 2010-01-25 | 2010-01-25 | Cyclograph for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201002124U CN201580155U (en) | 2010-01-25 | 2010-01-25 | Cyclograph for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201580155U true CN201580155U (en) | 2010-09-15 |
Family
ID=42722150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201002124U Expired - Fee Related CN201580155U (en) | 2010-01-25 | 2010-01-25 | Cyclograph for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201580155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963517A (en) * | 2014-04-22 | 2014-08-06 | 李理 | Rotary concentric circle chalk mark scriber |
-
2010
- 2010-01-25 CN CN2010201002124U patent/CN201580155U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963517A (en) * | 2014-04-22 | 2014-08-06 | 李理 | Rotary concentric circle chalk mark scriber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20130125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |