CN201587240U - Compass used for teaching - Google Patents
Compass used for teaching Download PDFInfo
- Publication number
- CN201587240U CN201587240U CN2009202911244U CN200920291124U CN201587240U CN 201587240 U CN201587240 U CN 201587240U CN 2009202911244 U CN2009202911244 U CN 2009202911244U CN 200920291124 U CN200920291124 U CN 200920291124U CN 201587240 U CN201587240 U CN 201587240U
- Authority
- CN
- China
- Prior art keywords
- chalk sleeve
- base
- teaching
- support bar
- knob
- 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
The utility model provides a compass used for teaching which belongs to a teaching appliance. The structure of the compass includes a sucker, a base, supporting rods and a chalk sleeve; the sucker is arranged at the lower end of the base; the supporting rods penetrate the upper part of the chalk sleeve and are connected with the chalk sleeve in a sliding way; the upper end of the chalk sleeve is provided with a locating knob; the base is arranged at the right ends of the supporting rods and is fixedly connected with the supporting rods; the upper end of a support is provided with a handhold knob and is hinged with the handhold knob. The compass has the advantages of reasonable design, simple structure and convenient use, is convenient for a teacher to draw a circle and improves the teaching efficiency.
Description
Technical field
The utility model relates to a kind of teaching aid, specifically a kind of compasses for teaching.
Background technology
At present, when mathematical education, on blackboard used picture circle with compasses normally pass student with the scale-up version of compasses, this compasses are located insecure on smooth blackboard surface, the sizing of drawn circle is bad, so not only allow operation of teacher get up to feel trouble, and the circle of drawing is accurate inadequately.
Summary of the invention
In order to overcome the weak point in the above background technology, the utility model provides a kind of compasses for teaching simple in structure, easy to use.
A kind of compasses for teaching of the present utility model is realized in the following manner, the structure of these compasses comprises sucker, base, support bar and chalk sleeve, sucker is arranged on the base lower end, and support bar passes the top of chalk sleeve and is slidingly connected with it, and the chalk sleeve upper end is provided with positioning knob; Base is arranged on the support bar right-hand member and fixedlys connected with it, and the bearing upper end is provided with hand-held knob and hinged with it.
Support bar is provided with scale.
The chalk sleeve bottom is provided with locking nut.
The chalk of locking nut in can fastening chalk sleeve; Move chalk sleeve, regulate its position on support bar, when arriving required size, the rotation positioning knob is fixed on chalk sleeve on the support bar; Hand-held knob and base are hinged, can make things convenient for the picture circle.
The beneficial effects of the utility model are: reasonable in design, simple in structure, easy to use, can allow teacher's drafting on blackboard very freely circular, and can arbitrarily adjust round size as required, the circle of drafting is comparatively accurate, has improved the efficient of teaching.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Reference numeral:
1, support bar, 2, positioning knob, 3, chalk sleeve, 4, locking nut, 5, scale, 6, base, 7, hand-held knob, 8, sucker.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done following detailed description the in detail.
Embodiment:
As shown in the figure, the structure of these compasses is made up of sucker 8, base 6, support bar 1 and chalk sleeve 3, sucker 8 is arranged on base 6 lower ends, support bar 1 passes the top of chalk sleeve 3 and is slidingly connected with it, chalk sleeve 3 upper ends are provided with positioning knob 2, base 6 is arranged on support bar 1 right-hand member and fixedlys connected with it, and bearing 6 upper ends are provided with hand-held knob 7 and hinged with it; Support bar 1 is provided with scale 5; Chalk sleeve 3 bottoms are provided with locking nut 4.
Except that the described technical characterictic of specification, be those skilled in the art's known technology.
Claims (3)
1. a compasses for teaching comprises sucker, base, support bar and chalk sleeve, and sucker is arranged on the base lower end, it is characterized in that support bar passes the top of chalk sleeve and is slidingly connected with it, and the chalk sleeve upper end is provided with positioning knob; Base is arranged on the support bar right-hand member and fixedlys connected with it, and the bearing upper end is provided with hand-held knob and hinged with it.
2. a kind of compasses for teaching according to claim 1 is characterized in that support bar is provided with scale.
3. a kind of compasses for teaching according to claim 1 is characterized in that the chalk sleeve bottom is provided with locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202911244U CN201587240U (en) | 2009-12-28 | 2009-12-28 | Compass used for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202911244U CN201587240U (en) | 2009-12-28 | 2009-12-28 | Compass used for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201587240U true CN201587240U (en) | 2010-09-22 |
Family
ID=42747007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202911244U Expired - Fee Related CN201587240U (en) | 2009-12-28 | 2009-12-28 | Compass used for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201587240U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN114590059A (en) * | 2021-10-21 | 2022-06-07 | 白玉敏 | Novel circle drawing tool for teaching |
-
2009
- 2009-12-28 CN CN2009202911244U patent/CN201587240U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN114590059A (en) * | 2021-10-21 | 2022-06-07 | 白玉敏 | Novel circle drawing tool for teaching |
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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: 20100922 Termination date: 20111228 |