CN2320429Y - Plane geometry draughting ruler - Google Patents
Plane geometry draughting ruler Download PDFInfo
- Publication number
- CN2320429Y CN2320429Y CN 98236997 CN98236997U CN2320429Y CN 2320429 Y CN2320429 Y CN 2320429Y CN 98236997 CN98236997 CN 98236997 CN 98236997 U CN98236997 U CN 98236997U CN 2320429 Y CN2320429 Y CN 2320429Y
- Authority
- CN
- China
- Prior art keywords
- scale
- ruler
- moving chi
- plane geometry
- chi
- 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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Abstract
The utility model relates to a plane geometry drawing ruler. A fixed ruler is made into a square, and the center of the fixed ruler is provided with a hollow circle whose vertical side is provided with a slideway. A movable ruler is made into a semicircle whose side is provided with arc-shaped teeth. The movable ruler is arranged in the hollow circle of the fixed ruler, and the arc-shaped teeth are inserted into the slideway of the vertical side of the hollow circle. The fixed ruler and the movable ruler are in sliding fit. The movable ruler is provided with long holes which are parallel to the straight-line side of the movable ruler. One side near the straight side of the movable ruler is provided with a group of pen holes for inserting pen nibs. Due to the adoption of the scheme, students can conveniently and quickly manufacture various plane geometry figures. The utility model has the advantages of simple structure and convenient use and is a novel and original learning article for the students.
Description
The utility model relates to a kind of chi, and particularly a kind of plane geometry drawing ruler is fit to use when the middle school student learns.
At present, when the middle school student learns plane geometry, to carry the study article of multiple drafting plane geometric figures such as compasses, set square, protractor usually, not only be inconvenient to use and carry, but also caused economic waste, make people feel inconvenience.
The purpose of this utility model provides a kind of plane geometry drawing ruler, and it not only uses, easy to carry but also integrate compasses, protractor, set square, more economically.
The purpose of this utility model is achieved in that it comprises the scale of the long scale of tape unit, is characterized in that: scale is square, and the center of scale is provided with open circles, and the slideway of annular is arranged on the stile of scale open circles; Moving chi is semicircle, is provided with the arc tooth on the semicircular round edge of moving chi, and semicircular moving chi places the open circles of scale, and the arc eye cutting of moving chi places the slideway on the scale open circles stile, and scale and moving chi are slidingly matched; One group of slotted hole that is parallel to moving chi straight line is arranged on semicircular moving chi, also have a hole of one group of plant nib at moving chi by straight line one side.
Owing to adopted such scheme, can make the student make various plane geometric figures easily and efficiently, saved the trouble of carrying multiple drawing articles for use such as compasses, set square, protractor last class hour, having characteristics simple in structure, easy to use, is a kind of novelty and student's study article of showing unique characteristics.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a concrete structure schematic diagram of the present utility model.
Fig. 2 is the chi structural map.
Fig. 3 is the A-A cutaway view of Fig. 1.
In Fig. 1-3, scale 1 and moving chi 2 all are shaped with mould of plastics, and scale 1 be square, have domaticly on the four edges of scale 1, the long scale of unit are arranged under domatic.At the center of square scale 1 open circles 7 is arranged, on the stile of scale 1 open circles 7 flute profile slideway 8 is arranged, the long scale 9 of the unit's of being provided with angle also below open circles 7 stiles of scale 1.Moving chi 2 is semicircle, establishes the arc tooth 6 that three elongated segments go out the scale semicircle on moving chi 2 semicircular round edges, has both guaranteed that moving chi 2 rotates in the slideway of scale 1 flexibly, made chi 2 not deviate from from the flute profile slideway 8 on the scale 1 again.Semicircular moving chi 2 places the open circles 7 of scale 1, and the arc tooth 6 of moving chi 2 is inserted in the flute profile slideway 8 on open circles 7 stiles of scale 1, and scale 1 is slidingly matched with moving chi 2; One group of slotted hole 4 that is parallel to moving chi 2 straight lines is arranged on semicircular moving chi 2, also have a hole 5 of one group of plant nib at moving chi 2 by straight line one side.On moving chi 2, also be provided with toggle 3, also be provided with one group of circular hole 10 of deciding diameter that diameter commonly used does not wait on the scale 1.
Draw bowlder, hold scale 1 on the other hand, the another hand is put into the hole 5 of moving chi 2 by straight line one side plant nib with nib, driving chi 2 by nib rotates, moving chi 2 rotates by the flute profile slideway 8 that the arc tooth 6 on the round edge follows scale, pen has drawn a circular trace on paper in a hole 5 of moving chi 2 like this, when selecting different holes 5 for use, and the circular geometry figure that the size diameter of just can drawing does not wait; It is fixing to move chi 1 when drawing parallel lines, and selects the different slotted hole 4 on the moving chi 2, and the different parallel lines of width just can draw; When drawing triangle, pen prolongs the straight line of chi 2 and draws a straight line earlier, revolves rotary ruler 2 by toggle 3 then, the angular length scale 9 on the contrast scale hollow hole 7, setting-out on moving chi 2 straight lines again, the triangle of regulation and the geometric figure at various bands angle accurately just can draw.
Claims (3)
1. plane geometry drawing ruler, it comprises the scale of the long scale of tape unit, it is characterized in that: scale is square, and the center of scale is provided with open circles, and annular slide track is arranged on the stile of scale open circles; Moving chi is semicircle, is provided with the arc tooth on the semicircular round edge of moving chi, and semicircular moving chi places the center hole of scale, and the arc eye cutting of moving chi places the slideway on the scale center hole stile, and scale and moving chi are slidingly matched; One group of slotted hole that is parallel to moving chi straight line is arranged on semicircular moving chi, also have a hole of one group of plant nib at moving chi by straight line one side.
2. plane geometry drawing ruler according to claim 1 is characterized in that: the annular slide track on the scale open circles stile is a kind of cannelure.
3. plane geometry drawing ruler according to claim 1 is characterized in that: the arc tooth that the semicircle round edge of moving chi is provided with is three sections and prolongs and scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98236997 CN2320429Y (en) | 1998-03-20 | 1998-03-20 | Plane geometry draughting ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98236997 CN2320429Y (en) | 1998-03-20 | 1998-03-20 | Plane geometry draughting ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2320429Y true CN2320429Y (en) | 1999-05-26 |
Family
ID=33984912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98236997 Expired - Fee Related CN2320429Y (en) | 1998-03-20 | 1998-03-20 | Plane geometry draughting ruler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2320429Y (en) |
-
1998
- 1998-03-20 CN CN 98236997 patent/CN2320429Y/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 | ||
| 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 |