CN87205175U - Multipurpose drawing instrument for teaching - Google Patents
Multipurpose drawing instrument for teaching Download PDFInfo
- Publication number
- CN87205175U CN87205175U CN 87205175 CN87205175U CN87205175U CN 87205175 U CN87205175 U CN 87205175U CN 87205175 CN87205175 CN 87205175 CN 87205175 U CN87205175 U CN 87205175U CN 87205175 U CN87205175 U CN 87205175U
- Authority
- CN
- China
- Prior art keywords
- ruler
- protractor
- circular arc
- crimp
- semi
- 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.)
- Withdrawn
Links
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Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model comprises two straightedges and a connecting piece; one end of each straightedge is provided with a deep hole; center of circle needles and a chalk clip are respectively put in the two deep holes; the connecting piece is that a protractor with a semicircle circular arc groove. The utility model has the functions of the drawing instruments of a compasses straightedge, a set square, a T-square, a protractor, etc., draws the graphics with the required angle and draws conveniently a group of parallel lines.
Description
The utility model belongs to the teaching drawing appliance.
At present, plotting machine commonly used has ruler, set square, compasses, protractor, T-square etc. in the teaching.These teaching aids differ from one another, but its function all is single.Last class hour of teacher often need be carried several teaching aids and just can be met the demands.
The purpose of this utility model is a kind of multi-functional teaching aid of design, promptly substitutes multiple existing teaching aid with a teaching aid.
The utility model is made of by web member 3 ruler 1, ruler 2.Web member 3 is a protractor, have on it one with the semi-circular arc groove 9 of protractor semi-circular arc concentric, semi-circular arc groove 9 is provided with knob 5.Protractor semi-circular arc center is provided with dead axle 10, and the some on its base is bent crimp, and the crimp top is provided with a knob 4, and the axle of knob 4 is an eccentric cylinder.Ruler 1 is between eccentric cylinder and crimp, and it can be free to slide on crimp, and when knob 4 was screwed into certain angle, eccentric cylinder can compress ruler 1, makes it to be fixed on the crimp on protractor base.One end of ruler 1 and ruler 2 all has deep hole, and center of circle pin and chalk folder is housed respectively in the deep hole, is regulated in chute 8 by dog screw 6 and 7 and stretches, and the other end of ruler 2 then is fixed on the dead axle 10, is that freely rotate at the center with dead axle 10.Knob 5 on the ruler 2 can be along sliding in the semi-circular arc groove, and can arbitrarily ruler 2 be locked in arbitrary position on the semi-circular arc groove.
The xsect of ruler 1 of the present utility model can have straight trough for the stepped appearance of second order is arranged between the second order, little rank cooperate with the crimp of web member with straight trough, makes big terrace and crimp face horizontal alignment, and the xsect of ruler 2 is a rectangle.
Can make long ruler when the utility model can forward ruler 2 to 180 ° when using as required uses; Can be in order to measure two included angle of straight line; Can provide the figure that certain decides angle as required; Can make T-square when ruler 2 is 90 ° uses; Fixedly ruler 1, moves with ruler 2 and draws one group of parallel lines; When chalk and center of circle pin are released by ruler one end, can make compasses and use.
Claims (1)
- A kind of multi-purpose drafting tool of drawing in order to teaching, it is characterized in that by ruler 1, ruler 2 and web member 3 are formed, web member 3 is a protractor, have on it one with the semi-circular arc groove 9 of protractor semi-circular arc concentric, protractor semi-circular arc center is provided with dead axle 10, some on its base is bent crimp, the crimp top is provided with a knob 4, the axle of knob 4 is an eccentric cylinder, ruler 1 is promptly between eccentric cylinder and crimp, ruler 1 is fixed on when needed on the crimp on protractor base by eccentric cylinder, one end of ruler 1 and ruler 2 all has the deep hole that center of circle pin and chalk folder are housed respectively in it, the other end of ruler 2 then is fixed on the dead axle 10, is that freely rotate at the center with dead axle 10, and locks it in optional position in the semi-circular arc groove by the knob on the ruler 25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87205175 CN87205175U (en) | 1987-09-16 | 1987-09-16 | Multipurpose drawing instrument for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87205175 CN87205175U (en) | 1987-09-16 | 1987-09-16 | Multipurpose drawing instrument for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87205175U true CN87205175U (en) | 1988-05-04 |
Family
ID=4820973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87205175 Withdrawn CN87205175U (en) | 1987-09-16 | 1987-09-16 | Multipurpose drawing instrument for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87205175U (en) |
-
1987
- 1987-09-16 CN CN 87205175 patent/CN87205175U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |