CN2175116Y - Ellipse compass - Google Patents
Ellipse compass Download PDFInfo
- Publication number
- CN2175116Y CN2175116Y CN 93241951 CN93241951U CN2175116Y CN 2175116 Y CN2175116 Y CN 2175116Y CN 93241951 CN93241951 CN 93241951 CN 93241951 U CN93241951 U CN 93241951U CN 2175116 Y CN2175116 Y CN 2175116Y
- Authority
- CN
- China
- Prior art keywords
- ellipse
- tightrope
- ellipsograph
- crossfoot
- axonometer
- 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 belongs to a drawing appliance. Previously, ellipses were drawn without special appliances, and therefore, the process of drawing is inconvenient. The utility model is characterized in that the ellipse compass utilizes the characteristic that the sum of the distances from each point on an ellipse to two focuses of the ellipse is equal to the fixed length of the ellipse, the utility model is composed of a transverse ruler, a slide block, a rotary body, a drawing bar, a soft rope, a spring, etc., and various ellipse drawings can be conveniently drawn. The utility model has the advantages of simple structure, easy manufacture, convenient operation, etc.
Description
The utility model belongs to drawing appliance.
Ellipse is a kind of common figure.Owing to draw at present oval special apparatus, so people draw ellipse figure, normally adopt trace-point method, promptly according to the elliptic equation of required drafting, calculate the coordinate figure of oval several points respectively, and mark corresponding point, then these points are formed by connecting with smooth curve.Draw trouble of ellipse figure in this way.
Task of the present utility model is, a kind of drawing appliance is provided, and utilizes this apparatus, can draw out various ellipse figures easily.
Task of the present utility model is finished as follows:
Utilize oval go up each point to bifocal equal the characteristic of fixed length apart from sum, make ellipsograph reach the purpose of drafting ellipse figure.Introduce ellipsograph with reference to Fig. 1.Ellipsograph adopts and to turn (1), reel (2), lock-screw (3), slide block (4), crossfoot (5), axonometer (6), little pin (7), paintbrush (8), draw bar (9), spring (10) and formation such as tightrope (11) parts of etc.ing.A groove is arranged on slide block (4), crossfoot (5) is housed in the groove, slide block (4) can be along crossfoot (5) slippage.On one side of slide block (4) groove, a through hole vertical with groove is arranged, axonometer (6) tightly passes from this hole, and this axonometer can not move in the hole.Be contained in lock-screw (3) on the slide block (4) when screwing off, crossfoot (5) is pushed down in its end, with slide block (4) and crossfoot (5) locking, makes both slippages relatively.One end of crossfoot (5) is equipped with little pin (7), and the lower end of little pin (7) and axonometer (6) is sharp-pointed.On turn (1), a through hole is arranged, by this hole will turn (1) be enclosed within on the axonometer (6), turn (1) can rotate around axonometer (6), and can move up and down along axonometer (6).One boss is arranged at the turn top of (1), and in order to mounting spring (10), an aperture is arranged at the bottom of turn (1), and tightrope (11) passes from this hole.Be contained in reel (2) on turn (1) in order to rolling tightrope (11), reel (2) has certain frictional resistance when rolling is rotated, so that it can oneself be loosening in drawing course.The upper end of drawing bar (9) is connected with spring (10), and paintbrush (8) is equipped with in the lower end, and an aperture is arranged at the bottom at picture bar (9), and tightrope (11) can be twitched in the hole so that the lower end of picture bar (9) in drawing course along tightrope (11) slippage.Spring (10) makes the lower end of picture bar (9) be subjected to outside elastic force all the time, and this elastic force makes tightrope (11) be in tensioned state all the time.One end of tightrope (11) lies on the little pin (7), and the other end passes the aperture of the aperture of picture bar (9) and turn (1), is wound on the reel (2).Reel (2) can rotate, so that regulate the folding and unfolding length of tightrope (11).
Ellipsograph in use, earlier according to the ellipse of required drafting, the slide block (4) on the mobile crossfoot (5) makes the distance between little pin (7) and the axonometer (6), equals this oval focal length, screws off lock-screw (3) then and locks, and this distance is remained unchanged.Little pin (7) and axonometer (6) are inserted on the drawing, and the position that two pins are inserted is two the oval focuses of painting.Rotate reel (2), regulate the folding and unfolding length of tightrope (11), the position of paintbrush (8) is satisfied to paint the length requirement of long axis of ellipse.After tightrope (11) length adjustment was good, in drawing course, reel (2) must not rotate again, was fixed length so that connect the tightrope length of bifocal.During drawing, press down axonometer (6), with thumb and middle finger left rotation and right rotation and press down turn (1), drive picture bar (9) and make paintbrush (8) draw figure with forefinger.In drawing course, tightrope (11) is in tensioned state all the time, draws bar (9) when left rotation and right rotation, its lower end edge tightrope (11) slippage.
The utlity model has characteristics such as simple in structure, easy to manufacture, easy to use, can satisfy the requirement of drawing various ellipse figures.
The drawing explanation:
Fig. 1 is the structural representation of ellipsograph.
Claims (10)
1, a kind of apparatus of drawing ellipse figure is characterized in that: ellipsograph adopts and to turn (1), reel (2), lock-screw (3), slide block (4), crossfoot (5), axonometer (6), little pin (7), paintbrush (8), draw bar (9), spring (10) and formation such as tightrope (11) parts of etc.ing.
2, ellipsograph according to claim 1 is characterized in that: slide block has groove and hole on (4), and crossfoot (5) is housed in the groove, and axonometer (6) is housed in the hole.
3, ellipsograph according to claim 1 is characterized in that: slide block (4) can be along crossfoot (5) slippage, and lockable.
4, ellipsograph according to claim 1 is characterized in that: an end of crossfoot (5) is equipped with little pin (7).
5, ellipsograph according to claim 1 is characterized in that: turn (1) is rotatable, and can move up and down.
6, ellipsograph according to claim 1 is characterized in that: tightrope (11) one ends lie on the little pin (7), and the other end passes the aperture of picture bar (9) and turn (1), are wound on the reel (2).
7, ellipsograph according to claim 1 is characterized in that: lower end edge tightrope (11) slippage of drawing bar (9).
8, ellipsograph according to claim 1 is characterized in that: the elastic force of spring (10) is tightened tightrope (11).
9, ellipsograph according to claim 1 is characterized in that: reel (2) can be regulated the folding and unfolding length of tightrope (11).
10, ellipsograph according to claim 1 is characterized in that: the lower end of axonometer (6) and little pin (7) is sharp-pointed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93241951 CN2175116Y (en) | 1993-10-12 | 1993-10-12 | Ellipse compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93241951 CN2175116Y (en) | 1993-10-12 | 1993-10-12 | Ellipse compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2175116Y true CN2175116Y (en) | 1994-08-24 |
Family
ID=33815784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93241951 Expired - Fee Related CN2175116Y (en) | 1993-10-12 | 1993-10-12 | Ellipse compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2175116Y (en) |
-
1993
- 1993-10-12 CN CN 93241951 patent/CN2175116Y/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 |