CN86204798U - Multipurpose teaching compasses - Google Patents
Multipurpose teaching compasses Download PDFInfo
- Publication number
- CN86204798U CN86204798U CN 86204798 CN86204798U CN86204798U CN 86204798 U CN86204798 U CN 86204798U CN 86204798 CN86204798 CN 86204798 CN 86204798 U CN86204798 U CN 86204798U CN 86204798 U CN86204798 U CN 86204798U
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- China
- Prior art keywords
- straight
- bars
- bar
- length scale
- compasses
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- 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.)
- Ceased
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a multi-purpose educational compass, which is characterized in that the right side and the back side of the two straight bars of an educational compass are labeled with angle scales and length scales. The multi-purpose educational compass not only can draw circles, but also can draw rectangular coordinate systems and angles, and also has the functions of a long straight ruler and a short straight ruler. Therefore, the multi-purpose educational compass brings convenience for teachers' carryover and use.
Description
The utility model belongs to teaching aid.
The educational compasses used of teacher generally all was at one end hinged by two straight-bars in the past, and the other end is equipped with chalk folder and compasses point and constitutes.This educational compasses function singleness can only satisfy the requirement of picture circle, then also will be as drawing angle, rectangular co-ordinate and planar graph by means of protractor, ruler or set square etc., and this gives carrying of teacher and uses and brought inconvenience.The present invention improves at above-mentioned defective exactly.
The objective of the invention is to make educational compasses to justify, and can the double as ruler and the angle of directly drawing.Thereby for the teacher brings convenience.
Main points of the present invention are to have put on angle index and length scale on two straight-bars of educational compasses, as Fig. 1, Fig. 2 and shown in Figure 3, indicate angle index and length scale at (1a) of straight-bar (1) face, indicate the length scale at (2a) of straight-bar (2) face, at the another side of two straight-bars, promptly (1b) and (2b) face indicate the length scale.
The number of degrees that angle index is represented are the angles between straight-bar (1) and the straight-bar (2), straight-bar (1b) and (2b) the length scale of face be to pass through after two straight-bars are pulled into 180 ° to carry out continuous scale.
When angle was 0 ° between two straight-bars, promptly two straight-bars were incorporated into a time-out, and this educational compasses just becomes short ruler; When the angle between two straight-bars is 90 °, the rectangular coordinate system of just can drawing easily; When the angle between two straight-bars was 180 °, promptly two straight-bars drew back when in alignment, just become long ruler.As drawing any one angle, then ruler (2) can be aimed at the number of degrees calibration points on the ruler (1), the number of degrees easily then can draw.
This multipurpose educational compasses can be made by wooden materials or plastics.The cross section of straight-bar is a rectangle.
The function and the one of multipurpose educational compasses collection compasses of the present invention, ruler, protractor only reach and draw planar graph exactly with, picture rectangular coordinate system round once making compasses, picture angle.Because it is simple in structure and function is more, institute thinks carrying and impart knowledge to students and having brought convenience of teacher, and it also has material and is easy to get in addition, implements easy advantage.
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A profile.
Fig. 3 is the B-B profile.
Be embodiments of the invention below.
What Fig. 1 represented is one embodiment of the present of invention.
Multipurpose educational compasses of the present invention is to have put on angle index and length scale on two straight-bars (1) of educational compasses and straight-bar (2).Be marked with angle index and length scale at straight-bar (1), two kinds of scales all are marked on the top of (1a) face.10 °～90 ° the right that are marked in two straight-bar pin joints of angle index; 90 °～180 ° left sides that are marked in pin joint.The length scale is from the vertical intersection point place of two straight-bars mark.The above and below of straight-bar (2a) face all indicates the length scale, and the length scale of top is from the left part mark, and the long marking of whole bar is to be used as short ruler.The length scale of below is from the two straight-bars vertical intersection point place mark that hangs down, and can be used for the picture rectangular coordinate system with the length scale on the straight-bar (1).(1b) of two straight-bars and (2b) face indicate the length scale, above them, carry out continuous scale from left to right after this length scale pulls into 180 ° with two straight-bars, with as long ruler.
The cross section of two straight-bars is a rectangle, and material is wooden.
Claims (3)
1, a kind of multipurpose educational compasses that comprises two straight-bars, chalk folder, compasses point, it is characterized in that: indicate angle index and length scale at (1a) of straight-bar (1) face, indicate the length scale at (2a) of straight-bar (2) face, reaching (2b) at (1b) of two straight-bars, face indicates the length scale.
2, according to the described multipurpose educational compasses of claim (1), it is characterized in that: the number of degrees that angle index is represented are the angles between straight-bar (1) and straight-bar (2).
3, according to the described multipurpose educational compasses of claim (2), it is characterized in that: straight-bar (1b) and (2b) the length scale of face be to pass through after two straight-bars are pulled into 180 ° to carry out continuous scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204798 CN86204798U (en) | 1986-07-07 | 1986-07-07 | Multipurpose teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204798 CN86204798U (en) | 1986-07-07 | 1986-07-07 | Multipurpose teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86204798U true CN86204798U (en) | 1986-12-24 |
Family
ID=4807767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86204798 Ceased CN86204798U (en) | 1986-07-07 | 1986-07-07 | Multipurpose teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86204798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856919A (en) * | 2016-05-15 | 2016-08-17 | 潍坊科技学院 | Teaching tool |
-
1986
- 1986-07-07 CN CN 86204798 patent/CN86204798U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856919A (en) * | 2016-05-15 | 2016-08-17 | 潍坊科技学院 | Teaching tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right | ||
| CE01 | Termination of patent right |