CN203116633U - Improved protractor - Google Patents
Improved protractor Download PDFInfo
- Publication number
- CN203116633U CN203116633U CN 201320116030 CN201320116030U CN203116633U CN 203116633 U CN203116633 U CN 203116633U CN 201320116030 CN201320116030 CN 201320116030 CN 201320116030 U CN201320116030 U CN 201320116030U CN 203116633 U CN203116633 U CN 203116633U
- Authority
- CN
- China
- Prior art keywords
- protractor
- pointer
- scale
- improved
- protractor body
- 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
Links
Abstract
The utility model discloses a learning tool, and particularly provides an improved protractor. The improved protractor comprises a semicircular protractor body. A scale mark is arranged on a circular arc surface of the protractor body. A central point of the bottom edge of the protractor body is hinged to a pointer graduated scale. A needle point of the pointer graduated scale is close to the inner side of the scale mark of the protractor body. The improved protractor has the advantages that the central point of the bottom edge of the protractor body is hinged to the pointer graduated scale, and the defects that a short side is not convenient to measure and not high in measuring accuracy are overcome through the arranged pointer graduated scale. Therefore, the improved protractor is simple in arrangement structure, convenient to use, capable of achieving three functions, namely a direct angle-measuring function, a direct angle-drawing function and a special tiny semicircle or arc drawing function.
Description
Technical field
The utility model relates to a kind of learning tool, specifically a kind of improvement protractor.
Background technology
The scale mark of traditional protractor all is to be marked on the edge, when needs are measured the short angle of some length of sides, needs to cooperate ruler come reading, and troublesome poeration and precision are not high.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of simple in structure, easy to use, measures the improvement protractor high than the precision of minor face.
In order to solve the problems of the technologies described above, improvement protractor of the present utility model, the protractor body that comprises semicircle shape, the arc surface of protractor body is provided with scale, the base central point of protractor body is hinged with a root pointer rule, and the needle point of pointer scale chi is near the scale inboard of protractor body.
Described pointer scale chi is provided with the scale hole.
Advantage of the present utility model is:
Because the base central point of protractor body is hinged with a root pointer rule, solved by the pointer scale chi that arranges and to have measured than the not high defective of minor face inconvenience precision, arrange simple in structure thus, easy to use, can finish direct angulation, directly draw the angle, draw special small semicircle or three functions of arc.
Description of drawings
Fig. 1 is the structural representation of the utility model improvement protractor.
Embodiment
Below in conjunction with the drawings and specific embodiments, improvement protractor of the present utility model is described in further detail.
As shown in the figure, improvement protractor of the present utility model, the protractor body 1 that comprises semicircle shape, the arc surface of protractor body 1 is provided with scale 5, the base central point of protractor body 1 is hinged with a root pointer rule 2, the needle point of pointer scale chi 2 is near the scale inboard of protractor body 1, and pointer scale chi 2 is provided with scale hole 4.
During use, can divide three kinds of situations, concrete using method is as follows:
When using direct angle measuring function, stir pointer scale chi 2, overlaps with the another side of institute angle measurement, directly read the number of degrees of pointer tip indication;
When use is directly drawn the angle function, stir pointer scale chi 2, determine drawn angle, directly draw the angle then;
When using the special small semicircle of picture or arc, penholder is gone in the scale hole 4 on the pointer scale chi 2 to draw arc or semicircle.
With way of example the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any change or modification of doing based on the utility model all belong to the claimed scope of the utility model.
Claims (2)
1. improve protractor for one kind, the protractor body (1) that comprises semicircle shape, the arc surface of protractor body (1) is provided with scale (5), it is characterized in that: the base central point of described protractor body (1) is hinged with a root pointer rule (2), and the needle point of described pointer scale chi (2) is near the scale inboard of protractor body (1).
2. according to the described improvement protractor of claim 1, it is characterized in that: described pointer scale chi (2) is provided with scale hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116030 CN203116633U (en) | 2013-03-14 | 2013-03-14 | Improved protractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116030 CN203116633U (en) | 2013-03-14 | 2013-03-14 | Improved protractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203116633U true CN203116633U (en) | 2013-08-07 |
Family
ID=48896969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320116030 Expired - Fee Related CN203116633U (en) | 2013-03-14 | 2013-03-14 | Improved protractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203116633U (en) |
-
2013
- 2013-03-14 CN CN 201320116030 patent/CN203116633U/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: 20130807 Termination date: 20140314 |