CN201034538Y - Accurate bevel gauge for teaching - Google Patents
Accurate bevel gauge for teaching Download PDFInfo
- Publication number
- CN201034538Y CN201034538Y CNU200720011164XU CN200720011164U CN201034538Y CN 201034538 Y CN201034538 Y CN 201034538Y CN U200720011164X U CNU200720011164X U CN U200720011164XU CN 200720011164 U CN200720011164 U CN 200720011164U CN 201034538 Y CN201034538 Y CN 201034538Y
- Authority
- CN
- China
- Prior art keywords
- scale
- protractor
- crossfoot
- horizontal ruler
- teaching
- 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
Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
Provided is a teaching used precise protractor which comprises a handle, a scale, a shaft, a horizontal ruler and a protractor body. The protractor body is marked with bidirectional scales. The horizontal ruler and the scale are both marked with straight line scales. Both arc shaped ends of the protractor body are fixedly connected with both ends of the horizontal ruler. One end of the scale is connected with the center point of the horizontal ruler through the shaft. The scale can rotate in 180 DEG centering on the shaft. The other end of the scale is provided with double pointers which respectively point at the double scales of the protractor body. Both ends of the handle are respectively and fixedly connected on the horizontal ruler and the protractor body to make a teaching used precise protractor. Both end surfaces of the horizontal ruler are provided with clamps that prevent the scale from slipping. The utility model has the advantages of drawing the measured angle or arc continuously at one time, saving time and labor, drawing accurately and increasing the drawing quality and pace.
Description
Technical field
The utility model relates to teaching aid, particularly relates to the accurate protractor of a kind of teaching.
Background technology
Common teaching aid protractor in the past is used in the angle of doing angle, circular arc figure and determines, the proceed step by step geometric figure that draws, and is time-consuming, require great effort, and influences teaching process, and institute's measuring angle is also inaccurate.
Summary of the invention
The technical problems to be solved in the utility model, provide a kind of can one time the limit angle or the circular arc that draw and measured, the accurate protractor of timesaving teaching.
The technical scheme that adopts is:
The accurate protractor of a kind of teaching comprises handle, scale, axle, crossfoot, protractor body.The protractor body is carved with centre zero scale, the equal engraving straight line scale of crossfoot and scale, protractor body two arc ends are fixedlyed connected with the crossfoot two ends, one end of scale is connected by axle with the crossfoot central point, scale can pivot 180 °, the scale other end is provided with the double scale that two pointers instruct vectorial hornwork body respectively, and the handle two ends are fixedly connected on respectively on crossfoot and the protractor body, constitute the accurate protractor of a kind of teaching.
Above-mentioned crossfoot both ends of the surface are provided with the clip that stops that scale glides.
The utility model has the advantages that: can once connect draw institute's angulation or circular arc, save time, save trouble, the picture angle is accurate, improves picture quality and speed.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The accurate protractor of a kind of teaching comprises handle 6, scale 2, crossfoot 5, protractor body 1.Protractor body 1 is carved with centre zero scale, crossfoot 5 also slows down centre zero scale, the 1 liang of arc end in crossfoot 5 two ends and protractor body is fixedlyed connected, scale 2 places protractor body 1 back side, the one end is connected with the crossfoot center position by axle 3, can be around axle 3 Rotate 180s °, the removable front that is laminated to the arc outer rim of protractor body 1 of scale 2 other ends, be provided with two pointers 7 and point to double scale on the protractor body 1 respectively, for preventing that scale 2 pointer ends break away from the protractor body, can be provided with the clip 4 that stops that scale 2 glides in crossfoot 5 both ends of the surface.Handle 6 two ends are fixedly connected on crossfoot 5 and the protractor body 1 its position respectively and see scale when being convenient to operate clearly in the side of taking back.Pin handle 6 on blackboard, rotation scale 2 is pressed scale 2 and is intersected with crossfoot 5 to specifying the angle of getting, and is will definitely once draw obtuse angle or acute angle and big or small circular arc with scale 2 both sides.
Claims (2)
1. accurate protractor of teaching, comprise handle (6), scale (2), axle (3), crossfoot (5), protractor body (1), it is characterized in that described protractor body (1) is carved with centre zero scale, crossfoot (5) and scale (2) be the engraving straight line scale all, protractor body (1) two arc end is fixedlyed connected with crossfoot (5) two ends, one end of scale (2) is connected by axle (3) with crossfoot (5) central point, scale (2) can pivot 180 °, scale (2) other end is provided with two pointers (7), instruct the double scale of vectorial hornwork body (1) respectively, handle (6) two ends are fixedly connected on respectively on crossfoot (5) and the protractor body (1).
2. the accurate protractor of a kind of teaching according to claim 1 is characterized in that described crossfoot (5) both ends of the surface are provided with the clip that stops that scale (2) glides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720011164XU CN201034538Y (en) | 2007-03-19 | 2007-03-19 | Accurate bevel gauge for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720011164XU CN201034538Y (en) | 2007-03-19 | 2007-03-19 | Accurate bevel gauge for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034538Y true CN201034538Y (en) | 2008-03-12 |
Family
ID=39195427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720011164XU Expired - Fee Related CN201034538Y (en) | 2007-03-19 | 2007-03-19 | Accurate bevel gauge for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034538Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774186A (en) * | 2011-05-07 | 2012-11-14 | 秦青武 | Dotted line type protractor |
-
2007
- 2007-03-19 CN CNU200720011164XU patent/CN201034538Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774186A (en) * | 2011-05-07 | 2012-11-14 | 秦青武 | Dotted line type protractor |
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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: 20080312 |