CN201086547Y - Compass - Google Patents
Compass Download PDFInfo
- Publication number
- CN201086547Y CN201086547Y CNU2007200851803U CN200720085180U CN201086547Y CN 201086547 Y CN201086547 Y CN 201086547Y CN U2007200851803 U CNU2007200851803 U CN U2007200851803U CN 200720085180 U CN200720085180 U CN 200720085180U CN 201086547 Y CN201086547 Y CN 201086547Y
- Authority
- CN
- China
- Prior art keywords
- compasses
- compass
- centering pin
- connecting rod
- 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
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- Pivots And Pivotal Connections (AREA)
- Clamps And Clips (AREA)
Abstract
The utility model provides a pair of compasses comprising a centering pin arranged in the center of a compass bracket, two compass legs at the two sides of the compass bracket, which are telescopic joint levers, and a core retaining port provided at the top of the outmost joint lever. The novel compasses can efficiently solve the problem of the skid of the centering pin and difficulty to fix the centre of a circle due to directly fixing the centering pin below the compass grab handle. The symmetrical designed neb can save half speed of drawing a circle, the telescopic compass legs can finish drawing concentric circles at a time. Accordingly, the compasses can draw circles accurately and conveniently, and improve the drawing efficiency to a certain extent.
Description
Technical field
The utility model relates to a kind of compasses.
Background technology
Compasses are instruments commonly used in teaching and the office; our employed compasses are being drawn bowlder at present, because the centering pin of compasses arm bottom is too far away apart from the compasses lever, regular meeting centering pin occurs and skids when making; the center of circle is difficult for fixing phenomenon, makes picture justify the both inaccurate inconvenience that has.And when drawing concentric circles, use this compasses in the market, and then need twice above ability success, therefore picture efficient there is certain influence.
Summary of the invention
The utility model provides a kind of compasses, can solve centering pin and compasses lever and bring apart from too far away, and centering pin skids, and the center of circle is difficult for fixing, and the concentrically ringed problem of can not once drawing.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows: the center of described compasses frame is provided with centering pin, and the compasses arm is scalable connecting rod, is provided with the clamp port of pen core on the top of outermost connecting rod.
To improvement of the technical scheme: the scalable connecting rod of described compasses arm is provided with screw hole, and the length of scalable connecting rod is by the fixing control of screw.
Beneficial effect:
Use compasses described in the utility model, because centering pin is directly installed on the below of compasses lever, can effectively solves centering pin and skid, the center of circle is difficult for fixing phenomenon.Symmetric design nib, can make picture circular velocity save half, the compasses arm of adjustable-length makes concentric circles once to be drawn as.It is accurately convenient not only to draw circle, can also improve picture efficient to a certain extent.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
A kind of compasses as shown in Figure 1, the center of compasses frame 1 is provided with centering pin 2, and compasses frame 1 both sides are provided with two compasses arms 3, and compasses arm 3 is scalable connecting rod 4, is provided with nib clamp port 5 on the top of outermost connecting rod 4.The scalable connecting rod 4 of compasses arm 3 is provided with screw hole 6, and the length of scalable connecting rod 4 is by screw 7 fixing controls.The scalable connecting rod of described compasses arm is a more piece, during use, need only regulate expansion link according to the picture needs, the center of circle is fixed getting final product again.
Claims (2)
1. compasses, it is characterized in that: the center of described compasses frame is provided with centering pin, and compasses frame both sides are provided with two compasses arms, and the compasses arm is scalable connecting rod, is provided with the clamp port of pen core or pencil on the top of outermost connecting rod.
2. compasses according to claim 1 is characterized in that: the scalable connecting rod of described compasses arm is provided with screw hole, and the length of scalable connecting rod is by the fixing control of screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200851803U CN201086547Y (en) | 2007-06-06 | 2007-06-06 | Compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200851803U CN201086547Y (en) | 2007-06-06 | 2007-06-06 | Compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201086547Y true CN201086547Y (en) | 2008-07-16 |
Family
ID=39634142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200851803U Expired - Fee Related CN201086547Y (en) | 2007-06-06 | 2007-06-06 | Compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201086547Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
-
2007
- 2007-06-06 CN CNU2007200851803U patent/CN201086547Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656801A (en) * | 2018-05-08 | 2018-10-16 | 吴烁 | A kind of mathematical education auxiliary teaching device applied to education and instruction |
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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: 20080716 |