CN201275957Y - Accurate convenient bevel gauge - Google Patents
Accurate convenient bevel gauge Download PDFInfo
- Publication number
- CN201275957Y CN201275957Y CNU2008201729748U CN200820172974U CN201275957Y CN 201275957 Y CN201275957 Y CN 201275957Y CN U2008201729748 U CNU2008201729748 U CN U2008201729748U CN 200820172974 U CN200820172974 U CN 200820172974U CN 201275957 Y CN201275957 Y CN 201275957Y
- Authority
- CN
- China
- Prior art keywords
- protractor
- angle
- vernier
- ruler
- draw
- 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
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Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses an accurate and convenient protractor belonging to a drawing tool. The middle part of the protractor is hollow, the outer circumference thereof is provided with angle graduations, the circle center of the protractor is provided with a rotary shaft to fix a movable angle indication line drawing vernier, and the vernier is provided with a ruler which passes through the circle center of the protractor. When the protractor is used to draw an angle with a certain angle, the vertex of the known straight line is aligned to the circle center of the protractor being coincided with the standard bottom side of the protractor, the movable vernier determines the angle, and then the other side of the angle can be accurately and directly drawn along the ruler on the vernier. When the existing common protractor is used to draw the angle, a dot is firstly needed to be drawn, the protractor is moved, and then the ruler is used to draw the side of the angle. The same method is used, and the degree of the angle can also be accurately measured.
Description
Technical field
The utility model belongs to the drawing instrument protractor.
Background technology
When generally drawing the angle of certain angle with protractor, will be at the circumference respective angles scale place of protractor described point, remove protractor then, relend and help the draw unknown limit at angle of ruler, error is big like this, and drawing area is too little and protractor that use is too big, the long mistake of described point sometimes, the center of circle and the point retouched be apart from the too far away and straight line that is difficult for drawing, and it is very inconvenient to draw the limit.
The utility model content
To draw angle error big in order to overcome the standing crop hornwork, and the deficiency of described point inconvenience, the purpose of this utility model provide a kind of protractor that accurately makes things convenient for, and this accurately makes things convenient for can directly accurately the draw sideline at angle of protractor.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of protractor that accurately makes things convenient for, it is characterized in that: semicircular, excircle has the mid portion hollow out of the protractor of angle index, the hollow out base is that 0 degree and 180 degree lines are the standard base, there is a rotating shaft in the center of circle of protractor, and fix a movably angle indication setting-out vernier, the ruler in the protractor center of circle was arranged on the described vernier.
The beneficial effects of the utility model are when drawing the angle of certain angle with described protractor, the center of circle of the summit amount of alignment hornwork of known straight line, known limit overlaps with the standard base of protractor, moving cursor is determined angle, just can accurately and directly draw along the ruler on the vernier then and be drawn another limit at angle.Also can accurately measure the number of degrees of known angle with identical method.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model,
Among the figure, 1. angle index, 2. rotating shaft, 3. angle indication setting-out vernier, 4. ruler, 5. standard base.
The specific embodiment
The specific embodiment of the present utility model is, as shown in the figure:
Embodiment 1, a kind of protractor that accurately makes things convenient for, it is characterized in that: semicircular, excircle has the mid portion hollow out of the protractor of angle index 1, the hollow out base is that 0 degree and 180 degree lines are standard base 5, there is a rotating shaft 2 in the center of circle of protractor, and fixes a movably angle indication setting-out vernier 3, and the ruler 4 in the protractor center of circle was arranged on the described vernier.
Claims (1)
1. one kind accurately makes things convenient for protractor, it is characterized in that: semicircular, excircle has the mid portion hollow out of the protractor of angle index, the hollow out base is that 0 degree and 180 degree lines are the standard base, there is a rotating shaft in the center of circle of protractor, and fix a movably angle indication setting-out vernier, the ruler in the protractor center of circle was arranged on the described vernier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201729748U CN201275957Y (en) | 2008-10-15 | 2008-10-15 | Accurate convenient bevel gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201729748U CN201275957Y (en) | 2008-10-15 | 2008-10-15 | Accurate convenient bevel gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201275957Y true CN201275957Y (en) | 2009-07-22 |
Family
ID=40893536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201729748U Expired - Fee Related CN201275957Y (en) | 2008-10-15 | 2008-10-15 | Accurate convenient bevel gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201275957Y (en) |
-
2008
- 2008-10-15 CN CNU2008201729748U patent/CN201275957Y/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: 20090722 Termination date: 20091116 |