CN202293907U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN202293907U CN202293907U CN201120467465XU CN201120467465U CN202293907U CN 202293907 U CN202293907 U CN 202293907U CN 201120467465X U CN201120467465X U CN 201120467465XU CN 201120467465 U CN201120467465 U CN 201120467465U CN 202293907 U CN202293907 U CN 202293907U
- Authority
- CN
- China
- Prior art keywords
- swingle
- fixing shaft
- fixed axis
- revolving bar
- fixed
- 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
- 239000012467 final product Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a pair of teaching compasses comprises a fixing shaft, wherein a sucking disc is arranged at the bottom of the fixing shaft, a horizontal revolving bar is arranged at the upper end of the fixing shaft, one end of the revolving bar is sleeved on the fixing shaft and movably connected with the fixing shaft, the other end of the revolving bar is fixed with a fixing sleeve which is parallel to the fixing shaft and positioned on the same side with the revolving bar, and scale marks are formed on the revolving bar. The pair of teaching compasses, provided by the utility model, is reasonable in structural design, is convenient and quick to use, can be used for drawing accurately, and saves time and labor.
Description
Technical field:
The utility model relates to a kind of educational compasses, belongs to teaching aid.
Background technology:
Compasses are teaching aids that the mathematics teacher uses always, and traditional educational compasses is many to be made up of two hinged support arms, and the bottom of a support arm is provided with sharp-pointed fixing feet, and the bottom of another support arm is provided with the chalk fixed cover.During use, separately two support arms are measured its distance in order to confirm the radius of a circle of painting; Withstand blackboard with fixing feet again and get final product draw circles, its complex operation, low precision; Use has certain limitation; Can't draw bigger or less circle, and sharp-pointed fixing feet makes blackboard eye and cut occur, influence the service life of blackboard.
Summary of the invention:
The purpose of the utility model provides a kind of educational compasses, and its reasonable in design is convenient to use, draws accurately, and is time saving and energy saving.
The purpose of the utility model realizes as follows: this educational compasses comprises fixed axis; The bottom of fixed axis is provided with sucker; The upper end of fixed axis is provided with the swingle of level; One end of swingle is set on the fixed axis and flexibly connects with fixed axis, and the other end of swingle is fixed with parallel with fixed axis through adjusting nut and is in the fixed cover of swingle homonymy, and swingle is provided with graduation mark.
The utility model adopts sucker to replace the sharp-pointed fixing feet of tradition, and is fixed, can not damage blackboard; Swingle is provided with graduation mark, and the size place that adjustment fixedly is set to required radius can confirm the radius of a circle of painting, and is easy to operate, and accuracy is high; During drawing, rotate swingle with hand and get final product the picture circle, convenient to operation.
Description of drawings:
Fig. 1 is the structural representation of the utility model.
The specific embodiment:
With reference to Fig. 1; A fixed axis 1 is arranged; The bottom of fixed axis 1 is provided with sucker 4, and the upper end of fixed axis 1 is provided with the swingle 2 of level, and an end of swingle 2 is set on the fixed axis 1 and with fixed axis 1 and flexibly connects; The other end of swingle 2 is fixed with parallel with fixed axis 1 through adjusting nut and is in the fixed cover 3 of swingle 2 homonymies, and swingle 2 is provided with graduation mark.During use, through adjusting nut fixed cover is adjusted to required radius size place, chalk is inserted in the fixed cover, through sucker fixed axis 1 is adsorbed on the blackboard then, rotating swingle 2 at last can the picture circle.
Claims (1)
1. educational compasses; Comprise fixed axis (1); It is characterized in that: the bottom of fixed axis (1) is provided with sucker (4), and the upper end of fixed axis (1) is provided with the swingle (2) of level, and an end of swingle (2) is set in fixed axis (1) and goes up and flexibly connect with fixed axis (1); The other end of swingle (2) is fixed with parallel with fixed axis (1) through adjusting nut and is in the fixed cover (3) of swingle (2) homonymy, and swingle (2) is provided with graduation mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120467465XU CN202293907U (en) | 2011-10-31 | 2011-10-31 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120467465XU CN202293907U (en) | 2011-10-31 | 2011-10-31 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202293907U true CN202293907U (en) | 2012-07-04 |
Family
ID=46362872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120467465XU Expired - Fee Related CN202293907U (en) | 2011-10-31 | 2011-10-31 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202293907U (en) |
-
2011
- 2011-10-31 CN CN201120467465XU patent/CN202293907U/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: 20120704 Termination date: 20121031 |