CN202896074U - Teaching straightedge with function of drawing circle - Google Patents
Teaching straightedge with function of drawing circle Download PDFInfo
- Publication number
- CN202896074U CN202896074U CN 201220613217 CN201220613217U CN202896074U CN 202896074 U CN202896074 U CN 202896074U CN 201220613217 CN201220613217 CN 201220613217 CN 201220613217 U CN201220613217 U CN 201220613217U CN 202896074 U CN202896074 U CN 202896074U
- Authority
- CN
- China
- Prior art keywords
- straightedge
- teaching
- ruler
- circle
- function
- 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 teaching straightedge with a function of drawing a circle comprises the straightedge and a magnetic cylinder body. One end of the straightedge is connected with a center of the magnetic cylinder body in sliding and hinged modes through a screw, and the straightedge and the magnetic cylinder body can rotate relatively. A sliding cover is placed on the straightedge in a sleeved mode and can slide horizontally on the straightedge, a chalk sleeve perpendicular to a plane of the straightedge is placed on one side of the sliding cover, a positioning bolt is arranged on the other side of the sliding cover, and scale marks are placed on the plane of the straightedge. The teaching straightedge with the function of drawing the circle has two functions of the straightedge and a pair of compasses. Compared with the prior art, the teaching straightedge with the function of drawing the circle has the advantages that a center of the circle is stable and accurate, a radius is continuous and adjustable, size is clear at a glance and operation is convenient and fast.
Description
Technical field
The utility model relates to a kind of, is specifically related to a kind of teaching straightedge rule with drawing the circle function.
Background technology
In mechanical drawing teaching, straightedge rule and compasses are teaching aid commonly used, and the double-legged compasses of large-scale legs-separated that adopt are drawn arc at the blackboard upper drawing circle more when imparting knowledge to students at present.Current large, medium and small has generally been adopted since the irony plastic-blasting face blackboard, and aforementioned compasses are far from suitable.Except volume greatly, is easily lost, more out-of-date also be needle point fixedly center of circle mode easily skid difficult stablely, also easily scratch blackboard.Need between straightedge rule and compasses, switch when charting in addition, use extremely inconvenient.
The utility model content
The purpose of this utility model is exactly the defective that exists for prior art, and a kind of teaching straightedge rule with drawing the circle function is provided.
Its technical scheme is: comprise ruler and magnetic cylinder.One end of described ruler and the center of magnetic cylinder are hinged by the screw slip, and the two can relatively rotate; Be set with sliding sleeve on the ruler, this sliding sleeve can horizontally slip at ruler, and a side of sliding sleeve is provided with the bush of chalk perpendicular with the ruler plane, and opposite side is provided with bolt, and the plane of ruler is provided with graduation mark.
The utility model possesses straightedge rule and two kinds of functions of compasses, and it has following advantage compared with prior art: the center of circle is stable accurately, radius continuously adjustable, size is very clear, behaviour does fast and easy.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
The specific embodiment
With reference to Fig. 1, a kind of teaching straightedge rule with drawing the circle function comprises ruler 1 and magnetic cylinder 2.One end of described ruler 1 and the center of magnetic cylinder 2 are hinged by screw 3 slips, and the two can relatively rotate; Be set with sliding sleeve 4 on the ruler 1, this sliding sleeve 4 can horizontally slip at ruler 1, and a side of sliding sleeve 4 is provided with the bush of chalk 6 perpendicular with the ruler plane, and opposite side is provided with bolt 5, and the plane of ruler 1 is provided with graduation mark 7.
During use, this sliding sleeve 4 is slid into ruler 1 left end, namely can be used as straightedge rule and use.Utilize magnetic cylinder 2 as the center of circle, with reference to graduation mark 7 with slip sliding sleeve 4 to required radial location, with bush of chalk 6 interior insertion chalks can picture circle, possess straightedge rule and two kinds of functions of compasses with this this device, behaviour does fast and easy.
Claims (1)
1. the teaching straightedge rule with picture circle function comprises ruler and magnetic cylinder, it is characterized in that: an end of described ruler and the center of magnetic cylinder are hinged by the screw slip, and the two can relatively rotate; Be set with sliding sleeve on the ruler, this sliding sleeve can horizontally slip at ruler, and a side of sliding sleeve is provided with the bush of chalk perpendicular with the ruler plane, and opposite side is provided with bolt, and the plane of ruler is provided with graduation mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613217 CN202896074U (en) | 2012-11-20 | 2012-11-20 | Teaching straightedge with function of drawing circle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613217 CN202896074U (en) | 2012-11-20 | 2012-11-20 | Teaching straightedge with function of drawing circle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202896074U true CN202896074U (en) | 2013-04-24 |
Family
ID=48116782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220613217 Expired - Fee Related CN202896074U (en) | 2012-11-20 | 2012-11-20 | Teaching straightedge with function of drawing circle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202896074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774332A (en) * | 2016-05-13 | 2016-07-20 | 安庆师范学院 | Novel multifunctional teaching compasses |
-
2012
- 2012-11-20 CN CN 201220613217 patent/CN202896074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774332A (en) * | 2016-05-13 | 2016-07-20 | 安庆师范学院 | Novel multifunctional teaching 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: 20130424 Termination date: 20131120 |