CN203019913U - Ellipsograph - Google Patents
Ellipsograph Download PDFInfo
- Publication number
- CN203019913U CN203019913U CN 201320041746 CN201320041746U CN203019913U CN 203019913 U CN203019913 U CN 203019913U CN 201320041746 CN201320041746 CN 201320041746 CN 201320041746 U CN201320041746 U CN 201320041746U CN 203019913 U CN203019913 U CN 203019913U
- Authority
- CN
- China
- Prior art keywords
- ellipse
- pin
- fixed
- legs
- ellipsograph
- 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 an ellipsograph. Three legs are arranged on a rotating shaft; two of the legs are used for determining fixed points of an ellipse, and the other leg is connected with a pencil. The definition of the ellipse is that a distance between the two fixed points is equal to a fixed length, and a trace of the points forms the ellipse. Therefore, two of the legs are used for determining the two fixed points of the ellipse, and an angle between the two legs can be adjusted; and after the other leg is fixed by a thin rope, the thin rope is tightened to draw the ellipse.
Description
Technical field
The utility model relates to a kind of novel ellipsograph, belongs to the life technical field.
Background technology
Relate to oval knowledge in mathematical problem a lot, if the bad meeting of ellipse drawing has influence on the thinking of doing topic and follows method, particularly the teacher is at school the time, if can show the ellipse of a standard on blackboard, in the time of that explanation, the student just can be clearer.So, the ellipse what instrument can draw a standard with out, this is the main direction of the utility model research.
Summary of the invention
In order to address the above problem, the utility model provides a kind of ellipsograph to be used for addressing the above problem.
The technical scheme that its technical problem that solves the utility model adopts is: three pin of design on a rotating shaft, and wherein two pin are used for determining oval fixed point, another pin connects pencil.Definition according to ellipse: equal to the distance of two fixed points the figure that the track of the point of fixed length forms and just be called ellipse.Therefore, design two pin and be used for to determine two oval fixed points, and the subtended angle size between bipod can regulate, after cord has been fixed the another pin, just can strain cord and draw ellipse.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
In figure, (1) connects the pin of pencil, and (2) decide pin, and (3) decide pin, (4) cord.
The specific embodiment
In Fig. 1, three pin of design under a rotating shaft, wherein decide pin (2) and another and decide pin (3) and be linked in sequence for one, decide the pin effect for two and be to determine two oval fixed points, and the subtended angle between bipod is straight can adjusting size, the distance of fixed point also can be regulated like this, and the distance of fixed point is different, and the elliptical shape size that draws is also different.
In Fig. 1, design a pin (1) that connects pencil, this pin and cord (4) are linked in sequence, and just can strain cord after pin undetermined has been determined and draw ellipse.
In Fig. 1, cord (4) should have certain elasticity, so just can determine the size of fixed length, and different fixed length can determine the ellipse of different sizes, and the ellipsograph of design is well suited for teacher's use like this, can draw the ellipse of a standard.
Claims (1)
1. an ellipsograph, is characterized in that, three pin of design on a rotating shaft, and wherein two pin are used for determining oval fixed point, another pin connects pencil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041746 CN203019913U (en) | 2013-01-26 | 2013-01-26 | Ellipsograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041746 CN203019913U (en) | 2013-01-26 | 2013-01-26 | Ellipsograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203019913U true CN203019913U (en) | 2013-06-26 |
Family
ID=48643918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320041746 Expired - Fee Related CN203019913U (en) | 2013-01-26 | 2013-01-26 | Ellipsograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203019913U (en) |
-
2013
- 2013-01-26 CN CN 201320041746 patent/CN203019913U/en not_active Expired - Fee Related
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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: 20130626 Termination date: 20140126 |