CN205220164U - Teaching compasses - Google Patents
Teaching compasses Download PDFInfo
- Publication number
- CN205220164U CN205220164U CN201520929818.1U CN201520929818U CN205220164U CN 205220164 U CN205220164 U CN 205220164U CN 201520929818 U CN201520929818 U CN 201520929818U CN 205220164 U CN205220164 U CN 205220164U
- Authority
- CN
- China
- Prior art keywords
- chi
- nested
- interior
- rotatory
- fixed 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
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model belongs to teaching equipment field especially relates to a teaching compasses, it is including rotatory chi, fixed ruler, rotatory chi is including nested chi and interior chi, the one end of interior chi and the one end of fixed ruler are connected through the pivot, inside locating nested chi in the other end of interior chi, with the length of the scalable rotatory chi of nested chi combined action, nested chi top be equipped with the fastening hole and with the fastening supporting fastening screw in hole, the other end of nested chi is equipped with clamping device, the fixed ruler bottom is equipped with the sucking disc. The utility model discloses after the teaching aid rigidity, the position be difficult to to change, has solved traditional ruler strong point phenomenon that squints easily, the easy failure problem that leads to mapping that changes of radius length when drawing has been solved to rotatory chi adjustable length and easy to be fixed, and rational in infrastructure, easy operation carries, uses all convenient and fast.
Description
Technical field
The utility model belongs to teaching equipment field, especially relates to a kind of educational compasses.
Background technology
In mathematical education process, conventional ruler carries out making circular diagram or string figure.And traditional construction with ruler and compasses method to be feet fix, rotate pin and rotate and draw.But strong point skew often easily occurs, or between feet and rotation pin, span the reason such as easily to change and causes drawing unsuccessfully.Although prior art makes moderate progress to problems, in mathematical education process, the ruler result of use after improvement is still undesirable.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides a kind of educational compasses, and its structure is simple, easy to operate, can improve mapping speed and quality of instruction, effectively improve efficiency of teaching, alleviate the working strength of teacher.
It is that a kind of educational compasses, comprises rotation chi, fixed ruler that the utility model solves the technical scheme that its technical problem adopts; Rotate chi and comprise nested chi and interior chi;
One end of interior chi is connected by rotating shaft with one end of fixed ruler;
Nested chi is located at inner, with the length of nested chi acting in conjunction Telescopic rotary chi in the other end of interior chi;
Nested chi top is provided with fastener hole and the holding screw supporting with fastener hole, makes nested chi and interior chi compact siro spinning technology or unclamp to be connected by tightening or unscrew holding screw, and then adjusts and fix and rotate chi length;
The other end of nested chi is provided with clamping device, is convenient to clamping chalk etc. for drawing;
Fixed ruler bottom is provided with sucker, for fixing teaching aid position.
The beneficial effects of the utility model are, a kind of educational compasses, and after teaching aid position is fixing, position is not easy change, solves the easy shift phenomenon of traditional ruler strong point; Rotate chi adjustable length and easily fixing, when solving picture, radius length easily changes and causes failure problem of mapping, rational in infrastructure, simple to operate, carry, use all convenient and swift, improve mapping speed and quality of instruction, effective raising efficiency of teaching, alleviates teaching job intensity.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the front view of the structural representation of educational compasses.
Fig. 2 is the top view of the structural representation of educational compasses.
1. fixed rulers in figure, chi 2., 3. nested chi, 4. rotating shaft, 5. holding screw, 6. clamping device, 7. sucker.
Detailed description of the invention
With reference to accompanying drawing, a kind of educational compasses, comprises rotation chi, fixed ruler 1; Rotate chi and comprise nested chi 3 and interior chi 2; One end of interior chi 2 is connected by rotating shaft 4 with one end of fixed ruler 1; Nested chi 3 is located at inner, with the length of nested chi 3 acting in conjunction Telescopic rotary chi in the other end of interior chi 2; Nested chi 3 top is provided with fastener hole (not shown) and the holding screw 5 supporting with fastener hole, makes nested chi 3 and interior chi 2 compact siro spinning technology or unclamp to be connected by tightening or unscrew holding screw 5, and then adjusts and fix and rotate chi length; The other end of nested chi 3 is provided with clamping device 6, is convenient to clamping chalk etc. for drawing; Fixed ruler 1 bottom is provided with sucker 7, for fixing teaching aid position.
Claims (1)
1. an educational compasses, comprises rotation chi, fixed ruler; It is characterized in that, rotate chi and comprise nested chi and interior chi; One end of interior chi is connected by rotating shaft with one end of fixed ruler; Nested chi is located at inner, with the length of nested chi acting in conjunction Telescopic rotary chi in the other end of interior chi; Nested chi top is provided with fastener hole and the holding screw supporting with fastener hole; The other end of nested chi is provided with clamping device; Fixed ruler bottom is provided with sucker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520929818.1U CN205220164U (en) | 2015-11-21 | 2015-11-21 | Teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520929818.1U CN205220164U (en) | 2015-11-21 | 2015-11-21 | Teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205220164U true CN205220164U (en) | 2016-05-11 |
Family
ID=55895253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520929818.1U Expired - Fee Related CN205220164U (en) | 2015-11-21 | 2015-11-21 | Teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205220164U (en) |
-
2015
- 2015-11-21 CN CN201520929818.1U patent/CN205220164U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161121 |