CN201552908U - Compasses capable of being used for drawing circular arcs with set central angles - Google Patents
Compasses capable of being used for drawing circular arcs with set central angles Download PDFInfo
- Publication number
- CN201552908U CN201552908U CN2009202297784U CN200920229778U CN201552908U CN 201552908 U CN201552908 U CN 201552908U CN 2009202297784 U CN2009202297784 U CN 2009202297784U CN 200920229778 U CN200920229778 U CN 200920229778U CN 201552908 U CN201552908 U CN 201552908U
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- CN
- China
- Prior art keywords
- circular
- circular arc
- compasses
- arc
- central angle
- 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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Abstract
The utility model discloses compasses capable of being used for drawing circular arcs with set central angles, which comprise a fixed rod, a painting brush holder and a circular-arc disc with central angle scales. The fixed rod and the painting brush holder are connected with a compasses-handle, a circular-arc slotted hole is arranged on the circular-arc disc, the central angle scales are arranged on the circular-arc disc beside the circular-arc slotted hole, a center hole of the circular-arc disc is connected with the fixed rod, and the painting brush rod penetrates through the circular-arc slotted hole in the circular-arc disc. The compasses can be used for drawing circular arcs with set central angle degrees accurately and can complete drawing the circular arcs with set central angel degrees without any external equipment, and then increases drawing efficiency of drawing personnel.
Description
Technical field
The utility model relates to the circular curve drawing instrument, refers to a kind of compasses of drawing given central angle circular arc particularly.
Technical background
As everyone knows, compasses have obtained designer's extensive use as a kind of drawing tools of routine, the circular arc of the given central angle number of degrees but conventional compasses can't draw, the circular arc that generally will draw the given central angle number of degrees must be by other drafting instrument, and technique of painting more complicated has increased designer's workload.
Summary of the invention
The purpose of this utility model is exactly that a kind of compasses that can draw given central angle circular arc will be provided.
For realizing this purpose, the compasses of drawing given central angle circular arc that the utility model is designed, it comprises fixed bar and the paintbrush bar that is connected in the compasses handle, it also comprises a circular arc dish that has the central angle angle index, offer arc groove hole on the circular arc dish, the central angle angle index is located on the other circular arc dish of arc groove hole, and the centre bore of circular arc dish is connected with fixed bar, and the paintbrush bar passes the arc groove hole in the circular arc dish.
Be provided with bearing between the centre bore of described circular arc dish and the fixed bar.
Advantage of the present utility model is: can accurately the draw circular arc of the given central angle number of degrees of these compasses, and need not to use any additional equipment can finish the drafting of the circular arc of the given central angle number of degrees, improved drawing personnel's picture efficient.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a upward view of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
A kind of compasses of drawing given central angle circular arc, as shown in Figure 1, it comprises the circular arc dish 4 that the fixed bar 3 that is connected in compasses handle 1 and 2, one on paintbrush bar have the central angle angle index, offers arc groove hole 6 on the circular arc dish 4; Be provided with bearing 5 between the centre bore 7 of this circular arc dish 4 and the fixed bar 3, guarantee like this when drawing circular arc that fixed bar 3 rotates and circular arc dish 4 is motionless.The profile of circular arc dish 4 can be circle or shapes such as circular arc or square.The paintbrush bar 2 of compasses passes the arc groove hole 6 in the circular arc dish 4.The width of arc groove hole 6 can be set according to drawn radius of a circle size, make it to draw the circular arc of different sizes, width as arc groove hole 6 is 10 centimetres, the interior radius of a circle of arc groove hole 6 is 5 millimeters, the radius of the cylindrical of arc groove hole 6 is 11 centimetres, and just can to draw radius be 0.7～10 centimetre circular arc to these compasses like this.Central angle angle index 8 is located on the circular arc dish 4 on arc groove hole 6 sides, as shown in Figure 2.
The utility model in use, at first determine the position of center of arc by fixed bar 3, another holds circular arc dish 4 to rotate on the other hand compasses handle 1 again, rotating paintbrush bar 2 makes paintbrush bar 2 rotate in the arc groove hole 6 of circular arc dish 4, after reaching given scale position, promptly finished the drafting of given central angle circular arc.
Claims (2)
1. the compasses that can draw given central angle circular arc, it comprises fixed bar and the paintbrush bar that is connected in the compasses handle, it is characterized in that it also comprises a circular arc dish that has the central angle angle index, offer arc groove hole on the circular arc dish, the central angle angle index is located on the other circular arc dish of arc groove hole, the centre bore of circular arc dish is connected with fixed bar, and the paintbrush bar passes the arc groove hole in the circular arc dish.
2. a kind of compasses of drawing given central angle circular arc according to claim 1 is characterized in that: be provided with bearing between the centre bore of described circular arc dish and the fixed bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202297784U CN201552908U (en) | 2009-11-10 | 2009-11-10 | Compasses capable of being used for drawing circular arcs with set central angles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202297784U CN201552908U (en) | 2009-11-10 | 2009-11-10 | Compasses capable of being used for drawing circular arcs with set central angles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201552908U true CN201552908U (en) | 2010-08-18 |
Family
ID=42612584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202297784U Expired - Fee Related CN201552908U (en) | 2009-11-10 | 2009-11-10 | Compasses capable of being used for drawing circular arcs with set central angles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201552908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112518702A (en) * | 2020-11-27 | 2021-03-19 | 邹东华 | Industrial wall marking device |
-
2009
- 2009-11-10 CN CN2009202297784U patent/CN201552908U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112518702A (en) * | 2020-11-27 | 2021-03-19 | 邹东华 | Industrial wall marking device |
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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: 20100818 Termination date: 20121110 |