CN202742905U - Compass for directly determining radius and diameter - Google Patents
Compass for directly determining radius and diameter Download PDFInfo
- Publication number
- CN202742905U CN202742905U CN2012204363528U CN201220436352U CN202742905U CN 202742905 U CN202742905 U CN 202742905U CN 2012204363528 U CN2012204363528 U CN 2012204363528U CN 201220436352 U CN201220436352 U CN 201220436352U CN 202742905 U CN202742905 U CN 202742905U
- Authority
- CN
- China
- Prior art keywords
- compass
- diameter
- graduated
- radius
- circle
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a compass for directly determining a radius and a diameter. The compass comprises a compass shaft, a graduated retractable bar, pen holders, a pen point and a spring, and is characterized in that the graduated retractable bar is arranged on the compass shaft, and the two pen holders of the compass are connected onto the retractable bar and are positioned on two sides of the compass shaft; according to the of the graduation of the graduated retractable bar, the radius or the diameter of the compass can be directly determined; and the graduation of the graduated retractable bar is automatically adjusted so that the a circle with the special radius or diameter can be drawn. The compass has the benefits that when the compass is used for drawing the circle, the radius or the diameter of the circle can be directly determined according to the of the graduation of the graduated retractable bar; and if the circle with the special radius or diameter needs to be drawn, all that is needed is to adjust the corresponding graduation of the graduated retractable bar.
Description
Technical field
The utility model belongs to office appliance, specifically, is a kind of compasses that can directly determine semidiameter.
Background technology
The structure of compasses only is that compass shaft is connected by a simple iron with penholder mostly in the market, therefore, just must look in addition the ruler amount if want to determine this radius of a circle or diameter after circle is drawn as, if and will draw the circle of certain radius or diameter, just must measure first the distance of compass shaft and nib with a yardstick, so comparatively inconvenient.The utility model is exactly designed for above problem.
Summary of the invention
The utility model technical issues that need to address are: after being drawn as circle for the compasses on the market, still must look in addition the ruler amount if want to determine this radius of a circle or diameter, if or will draw the circle of certain radius or diameter, just must measure first the distance of compass shaft and nib with a yardstick, therefore comparatively inconvenient problem provides a kind of compasses that can directly determine this radius of a circle or diameter.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of compasses that can directly determine semidiameter, comprise that compass shaft, graduated collapsible bar, penholder, nib and spring consist of, it is characterized in that: at compass shaft a graduated collapsible bar is set, two penholders of compasses are connected on this collapsible bar, and be positioned at the both sides of compass shaft, scale according to graduated collapsible bar just can directly be determined radius or the diameter of compasses, and the scale of automatically adjusting graduated collapsible bar just can be drawn the circle of certain radius or diameter.
The beneficial effects of the utility model are: can directly determine this radius of a circle or diameter according to the scale of graduated collapsible bar when drawing circle with a compass, and if draw the circle of certain radius or diameter, only need to adjust on the graduated collapsible bar corresponding scale and just can.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.Accompanying drawing is structural representation of the present utility model, and wherein: 1 is compass shaft; 2 is graduated collapsible bar; 3 is penholder; 4 is nib; 5 is nib; 6 is penholder; 7 is spring.
The specific embodiment
In the drawings, settle a graduated collapsible bar 2 and spring 7 on the compass shaft 1, connect respectively penholder 3 and penholder 6 in the both sides of graduated collapsible bar 2, the lower end that penholder 3 is connected with penholder connects respectively nib 4 and nib 5, just can directly determine this radius of a circle or diameter with this compasses picture bowlder according to the scale on the graduated collapsible bar 2, if draw the circle of certain radius or diameter, corresponding scale can on the graduated collapsible bar 2 just only need to adjust.
Claims (1)
1. the compasses that can directly determine semidiameter, comprise compass shaft, graduated collapsible bar, spring, penholder and nib, it is characterized in that: a graduated collapsible bar is set on the compass shaft, and two penholders of compasses are connected on this collapsible bar, and are positioned at the both sides of compass shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204363528U CN202742905U (en) | 2012-08-30 | 2012-08-30 | Compass for directly determining radius and diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204363528U CN202742905U (en) | 2012-08-30 | 2012-08-30 | Compass for directly determining radius and diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202742905U true CN202742905U (en) | 2013-02-20 |
Family
ID=47702349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204363528U Expired - Fee Related CN202742905U (en) | 2012-08-30 | 2012-08-30 | Compass for directly determining radius and diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202742905U (en) |
-
2012
- 2012-08-30 CN CN2012204363528U patent/CN202742905U/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: 20130220 Termination date: 20130830 |