CN201592605U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN201592605U CN201592605U CN200920298577XU CN200920298577U CN201592605U CN 201592605 U CN201592605 U CN 201592605U CN 200920298577X U CN200920298577X U CN 200920298577XU CN 200920298577 U CN200920298577 U CN 200920298577U CN 201592605 U CN201592605 U CN 201592605U
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- CN
- China
- Prior art keywords
- arm
- groove
- base
- teaching
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
A pair of teaching compasses belongs to teaching appliances and comprises a base, a sucker is fixedly connected to one side of the base, the other side of the base is fixedly connected with a fixed plate, a rotary handle rotating around a fixed center is arranged on the other side of the base in a rotating manner, a movable drawing arm is arranged inside a groove of the rotating handle, the front end of the drawing arm is provided with a chalk sleeve, and a fastening device is arranged on the outer circumference of the chalk sleeve. Circle center is easy to be fixed without slipping when using the teaching compasses adopting the means of fixing a circle center position attached to a blackboard through the sucker, the drawing arm inside the groove of the rotary handle capable of rotating around a fixed center is telescopic, and the pair of teaching compasses has simple structure, firm absorption, fast circle drawing and fine size accurateness effect.
Description
Technical field
The utility model belongs to teaching aid, particularly a kind of educational compasses.
Background technology
The used blackboard of teaching adopts frosted glass to make mostly at present, this blackboard hardness is bigger, and smooth, and the compasses of two arms, one end radial type commonly used are when being used to impart knowledge to students, be used for generally determining that the pin in the center of circle easily skids, be difficult for fixing, thereby draw quite inconvenience of circle, need repeated multiple times to be drawn as round, quite lose time, even the circle of drawing sometimes Cheng Yuan not, and radius of a circle also is difficult for determining, brings quite inconvenience to teaching.
Summary of the invention
The purpose of this utility model is the deficiency at above-mentioned technology, provide a kind of can be easily the fixing compasses for teaching of center of circle pin.
Structure of the present utility model is: it comprises pedestal, side at pedestal is fixedly connected with sucker, the opposite side of pedestal is fixedlyed connected with price fixing, and this side also rotates and be provided with the turning handle that centering is rotated, and is provided with in the groove of turning handle and movably draws arm, drawing arm can freely stretch along groove, be provided with the chalk chuck at the front end of drawing arm, draw bowlder and chalk can be inserted in the chalk chuck, on chalk chuck excircle, be provided with fastener, be used for firm chalk, prevent to fall under the chalk.
Described price fixing is provided with the angle groove, and rotating the picture arm can cut apart circumference.
Described picture arm is provided with the length groove, stretches out the picture arm and can change drawn radius of a circle.
Advantage of the present utility model: this compasses for teaching can make position, the center of circle be adsorbed on the blackboard by sucker owing to having adopted, thereby the center of circle is fixing easily, can not slide, it is scalable that turning handle groove inside-paint arm is rotated in centering, and it is simple in structure, absorption is firm, picture circular velocity is fast, size is accurately effective.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
1 is pedestal, the 2nd among the figure, sucker, the 3rd, turning handle, the 4th, price fixing, the 5th, picture arm, the 6th, fastener, the 7th, chalk chuck.
The specific embodiment
As shown in Figure 1 and Figure 2, it comprises pedestal 1 a kind of educational compasses, is fixedly connected with sucker 2 in a side of pedestal 1, and the opposite side of pedestal 1 is fixedlyed connected with price fixing 4, and this side is also rotated and is provided with the turning handle 3 that centering is rotated, in the groove of turning handle 3, be provided with and movably draw arm 5, draw arm 5 and can freely stretch, be provided with chalk chuck 7 at the front end of drawing arm 5 along groove, drawing bowlder can insert chalk in the chalk chuck 7, on chalk chuck excircle, be provided with fastener 6, be used for firm chalk, prevent to fall under the chalk.
Described price fixing 4 is provided with the angle groove, and rotating the picture arm can cut apart circumference.
Described picture arm 5 is provided with the length groove, stretches out the picture arm and can change drawn radius of a circle.
Claims (3)
1. educational compasses, it is characterized in that: it comprises pedestal (1), side at pedestal (1) is fixedly connected with sucker (2), the opposite side of pedestal (1) is fixedlyed connected with price fixing (4), and this side is rotated and is provided with the turning handle (3) that centering is rotated, in the groove of turning handle (3), be provided with and movably draw arm (5), be provided with chalk chuck (7), on chalk chuck (7) excircle, be provided with fastener (6) at the front end of drawing arm (5).
2. a kind of educational compasses according to claim 1 is characterized in that: described price fixing (4) is provided with the angle groove.
3. a kind of educational compasses according to claim 1 and 2 is characterized in that: described picture arm (5) is provided with the length groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920298577XU CN201592605U (en) | 2009-12-28 | 2009-12-28 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920298577XU CN201592605U (en) | 2009-12-28 | 2009-12-28 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201592605U true CN201592605U (en) | 2010-09-29 |
Family
ID=42774669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920298577XU Expired - Fee Related CN201592605U (en) | 2009-12-28 | 2009-12-28 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201592605U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515276A (en) * | 2016-12-12 | 2017-03-22 | 方建霞 | Portable intelligent teaching tool |
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
-
2009
- 2009-12-28 CN CN200920298577XU patent/CN201592605U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515276A (en) * | 2016-12-12 | 2017-03-22 | 方建霞 | Portable intelligent teaching tool |
| CN106515276B (en) * | 2016-12-12 | 2018-07-20 | 方建霞 | A kind of Portable intelligent teaching aid |
| CN107284087A (en) * | 2017-07-19 | 2017-10-24 | 郑金风 | A kind of teaching aid compasses |
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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: 20100929 Termination date: 20101228 |