CN201677644U - Protractor - Google Patents
Protractor Download PDFInfo
- Publication number
- CN201677644U CN201677644U CN2010201899750U CN201020189975U CN201677644U CN 201677644 U CN201677644 U CN 201677644U CN 2010201899750 U CN2010201899750 U CN 2010201899750U CN 201020189975 U CN201020189975 U CN 201020189975U CN 201677644 U CN201677644 U CN 201677644U
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- CN
- China
- Prior art keywords
- protractor
- arm
- groove
- straight line
- 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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- Length-Measuring Instruments Using Mechanical Means (AREA)
- Lenses (AREA)
Abstract
The utility model relates to a protractor, comprising a flaky semicircular body and an arm, wherein one end of the arm is hinged on the straight edge of the body by a hinge, and the other end of the arm is positioned at the scale position of the protractor so as to be convenient to read; and the protractor is characterized in that the arm is provided with a groove for drawing a straight line. Because the protractor in the utility model is provided with the movable arm and the groove which can draw the straight line is arranged on the arm, the drawing of the straight line is convenient during angular measurement. Meanwhile, a circular hole is also arranged on the arm. Therefore, when a drawing tool is inserted into the circular hole, a circular arc can be drawn by rotating the arm; and furthermore, the end of the arm is also provided with a magnifier so as to be convenient to read.
Description
Technical field
The utility model relates to a kind of protractor, particularly relates to a kind of protractor that can draw.
Background technology
Protractor of the prior art only has angle measuring function usually, when the student need make similar fan-shaped such figure, need make two radiuses of certain angle respectively, and then with the compasses corresponding arc that draws.At the bottom of having complex steps, efficient during the mapping of this method, the problem of low precision.In addition, protractor scale of the prior art is very little, and inconvenient user reads reading.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, can draw, easy-to-read protractor.
For solving the problems of the technologies described above, the utility model is taked a kind of protractor of following technical scheme, comprises the body and the arm of the semi-round ring shape of sheet, and an end of described arm is hinged on the straight flange of described body by hinge, its other end is positioned at the scale place of protractor, so that reading; It is characterized in that: described arm has the groove that is used to draw straight line.
Further, the side at described groove is provided with scale.
Further, be provided with the circular hole of a plurality of perforations at the opposite side of described groove.
Further, at the other end of described arm angle index place, also be provided with a magnifying glass corresponding to described protractor.
Further, on described magnifying glass, be printed with the index line of expression angle.
Protractor in the utility model is owing to have mobilizable arm, and on arm, has the groove that to draw straight line, therefore the convenient straight line of in angulation, drawing, simultaneously, on arm, also be provided with circular hole, so when drawing instrument is inserted described circular hole, and rotate described arm, just can draw out circular arc; In addition, also be provided with magnifying glass at the end of arm, so that reading.
Description of drawings
Fig. 1 is the structure chart of the protractor in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated.
Fig. 1 shows the structure chart of the protractor in the utility model.As shown in Figure 1, protractor in the utility model comprises that inside is the semicircular body 1 of semicircle hollow out and arm 2, and an end of described arm 2 is hinged on the straight flange of stating body 1 by hinge 3, and can be around hinge 3 rotations, its other end is positioned at the scale place of protractor, so that reading.
Described arm 2 has straight line drawing groove 4, and described straight line drawing groove 4 is divided into first one 5 and second ones 6 with described arm 2, and described first one 5 is provided with scale 7, is arranged on a plurality of circular holes 8 on described second one 6; Described scale 7 is used to draw radius, and described circular hole 8 is used for drawing instrument, as pencil, will go into wherein, thereby can draw circular arc.
At the other end of described arm 2 angle index place, also be provided with a magnifying glass 9, so that reading corresponding to described protractor.Preferably, be printed with an index line 10 that is used to represent to work as forearm 2 place angles on described magnifying glass 9, it represents arm 2 angle position at that time.
During use, the user can turn to predetermined angular position with described arm 2, draws radius with drawing instrument by described straight line drawing groove 4 then, simultaneously, also drawing instrument can be inserted in the circular hole 8 and cursor 2, to draw circular arc.
Claims (5)
1. protractor comprises the body and the arm of the semi-round ring shape of sheet, and an end of described arm is hinged on by hinge on the straight flange of described body, and its other end is positioned at the scale place of protractor, so that reading; It is characterized in that: described arm has the groove that is used to draw straight line.
2. protractor as claimed in claim 1 is characterized in that: the side at described groove is provided with scale.
3. protractor as claimed in claim 1 or 2 is characterized in that: the circular hole that is provided with a plurality of perforations at the opposite side of described groove.
4. protractor as claimed in claim 3 is characterized in that: at the other end of the described arm angle index place corresponding to described protractor, also be provided with a magnifying glass.
5. protractor as claimed in claim 4 is characterized in that: the index line that is printed with the expression angle on described magnifying glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201899750U CN201677644U (en) | 2010-04-30 | 2010-04-30 | Protractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201899750U CN201677644U (en) | 2010-04-30 | 2010-04-30 | Protractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201677644U true CN201677644U (en) | 2010-12-22 |
Family
ID=43342702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201899750U Expired - Fee Related CN201677644U (en) | 2010-04-30 | 2010-04-30 | Protractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201677644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522804A (en) * | 2013-10-22 | 2014-01-22 | 无锡俊达测试技术服务有限公司 | Protractor |
| CN110816129A (en) * | 2019-11-27 | 2020-02-21 | 徐州蓝格数字科技有限公司 | Sketch drawing ruler for computer mould |
-
2010
- 2010-04-30 CN CN2010201899750U patent/CN201677644U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522804A (en) * | 2013-10-22 | 2014-01-22 | 无锡俊达测试技术服务有限公司 | Protractor |
| CN110816129A (en) * | 2019-11-27 | 2020-02-21 | 徐州蓝格数字科技有限公司 | Sketch drawing ruler for computer mould |
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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: 20101222 Termination date: 20110430 |