CN202557103U - Multifunction circle-drawing instrument - Google Patents
Multifunction circle-drawing instrument Download PDFInfo
- Publication number
- CN202557103U CN202557103U CN2012201745677U CN201220174567U CN202557103U CN 202557103 U CN202557103 U CN 202557103U CN 2012201745677 U CN2012201745677 U CN 2012201745677U CN 201220174567 U CN201220174567 U CN 201220174567U CN 202557103 U CN202557103 U CN 202557103U
- Authority
- CN
- China
- Prior art keywords
- semicircular protractor
- circle
- straight line
- center
- ruler
- 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
Images
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- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model relates to a multifunction circle-drawing instrument. The multifunction circle-drawing instrument comprises a straight ruler provided with a semicircular protractor. The straight line edge of the semicircular protractor is in parallel with that of the straight ruler. A gravity needle is arranged on the semicircular protractor in rotating mode, and the rotation axis of the gravity needle is in coincidence with the center of scale division of the semicircular protractor, and a round hole matching with the diameter of a chalk is arranged in a joint point between the rotation axis of the gravity needle and the straight line edge of the semicircular protractor, and the center of the round hole is in coincidence with the joint point. A sliding groove is arranged on the straight ruler, a chalk-containing device is arranged inside the sliding groove in sliding mode, and the center of the chalk-containing device is in the same straight line as that of the round hole. When a user draws straight lines with different inclined angles on the blackboard, the gravity needle always faces downwards under gravity, and angles shown in the semicircular protractor can reflect the inclined angles of drawing edges of the straight ruler. The multifunction circle-drawing instrument also can be used to draw circles with different radiuses, and is simple and convenient to use.
Description
Technical field
The utility model relates to a kind of teaching aid, relates to a kind of function chi of blackboard mapping usefulness specifically.
Background technology
The present function chi of mapping usefulness on blackboard, receive its effect on structure can accurately draw circles, the parallax of horizontal line, plumb line and various angles, teacher is charted on blackboard in entirely by rule of thumb, difficulty relatively.
The utility model content
The problem that the utility model will solve is to above problem, and a kind of multifunction picture circle appearance of can paint quickly and accurately various circles and straight line is provided.
For addressing the above problem; The technical scheme that the utility model adopted is: multifunction picture circle appearance, comprise ruler, and said ruler is provided with semicircular protractor; The straight line of said semicircular protractor is parallel with the straight line of said ruler; Be rotatably installed with the gravity pin on the said semicircular protractor, the rotation of said gravity pin overlaps with the calibration center of said semicircular protractor, and the rotation of said gravity pin is provided with the circular hole that matches with the chalk diameter with the interface point of the straight line of said semicircular protractor; The center of circle of said circular hole overlaps with said interface point; Said ruler is provided with sliding tray, is slidingly fitted with the dress pen device in the said sliding tray, and the center of said dress pen device and the center of circle of said circular hole are positioned at straight line.
The utility model is taked above technical scheme; Have the following advantages: multifunction picture circle appearance, comprise ruler, said ruler is provided with semicircular protractor; The straight line of said semicircular protractor is parallel with the straight line of said ruler; Be rotatably installed with the gravity pin on the said semicircular protractor, the rotation of said gravity pin overlaps with the calibration center of said semicircular protractor, and the rotation of said gravity pin is provided with the circular hole that matches with the chalk diameter with the interface point of the straight line of said semicircular protractor; The center of circle of said circular hole overlaps with said interface point; Said ruler is provided with sliding tray, is slidingly fitted with the dress pen device in the said sliding tray, and the center of said dress pen device and the center of circle of said circular hole are positioned at straight line; When the utility model is drawn the straight line of different gradients on blackboard; Said gravity pin is downward all the time under the effect of gravitation; The angle that it is reflected in semicircular protractor can reflect the angle of inclination on ruler setting-out limit, and the utility model can also be drawn the circle of different radii, and is easy to use.
Below in conjunction with Fig. 1, Fig. 2 and embodiment the utility model is described further.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is that the A-A of Fig. 1 is to profile.
Among the figure: the 1-ruler; The 2-semicircular protractor; 3-gravity pin; The 4-circular hole; The 5-sliding tray; 6-adorns pen device.
The specific embodiment
Embodiment: multifunction picture circle appearance; Comprise ruler 1; Said ruler 1 is provided with semicircular protractor 2, and the straight line of said semicircular protractor 2 is parallel with the straight line of said ruler 1, is rotatably installed with gravity pin 3 on the said semicircular protractor 2; The rotation of said gravity pin 3 overlaps with the calibration center of said semicircular protractor 2; The rotation of said gravity pin 3 is provided with the circular hole 4 that matches with the chalk diameter with the interface point of the straight line of said semicircular protractor 2, and the center of circle of said circular hole 4 overlaps with said interface point, and said ruler 1 is provided with sliding tray 5; Be slidingly fitted with dress pen device 6 in the said sliding tray 5, the center of circle of the center of said dress pen device 6 and said circular hole 4 is positioned at straight line; When the utility model is drawn the straight line of different gradients on blackboard; Said gravity pin 3 is downward all the time under the effect of gravitation; The angle that it is reflected in semicircular protractor 2 can reflect the angle of inclination on ruler setting-out limit; The utility model can also be drawn the circle of different radii around said circular hole 4, and is easy to use.
Claims (1)
1. multifunction picture is justified appearance; Comprise ruler; It is characterized in that: said ruler is provided with semicircular protractor, and the straight line of said semicircular protractor is parallel with the straight line of said ruler, is rotatably installed with the gravity pin on the said semicircular protractor; The rotation of said gravity pin overlaps with the calibration center of said semicircular protractor; The rotation of said gravity pin is provided with the circular hole that matches with the chalk diameter with the interface point of the straight line of said semicircular protractor, and the center of circle of said circular hole overlaps with said interface point, and said ruler is provided with sliding tray; Be slidingly fitted with the dress pen device in the said sliding tray, the center of said dress pen device and the center of circle of said circular hole are positioned at straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201745677U CN202557103U (en) | 2012-04-14 | 2012-04-14 | Multifunction circle-drawing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201745677U CN202557103U (en) | 2012-04-14 | 2012-04-14 | Multifunction circle-drawing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202557103U true CN202557103U (en) | 2012-11-28 |
Family
ID=47206797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201745677U Expired - Fee Related CN202557103U (en) | 2012-04-14 | 2012-04-14 | Multifunction circle-drawing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202557103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111958019A (en) * | 2020-07-17 | 2020-11-20 | 湖南联智科技股份有限公司 | Auxiliary tool for drilling |
-
2012
- 2012-04-14 CN CN2012201745677U patent/CN202557103U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111958019A (en) * | 2020-07-17 | 2020-11-20 | 湖南联智科技股份有限公司 | Auxiliary tool for drilling |
| CN111958019B (en) * | 2020-07-17 | 2021-10-22 | 湖南联智科技股份有限公司 | Auxiliary tool for drilling |
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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: 20121128 Termination date: 20130414 |