CN2220947Y

CN2220947Y - Ellipsograph

Info

Publication number: CN2220947Y
Application number: CN 95211226
Authority: CN
Inventors: 陈伟祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-12
Filing date: 1995-05-12
Publication date: 1996-02-28
Anticipated expiration: 2005-05-12

Abstract

The utility model provides an ellipsograph, which comprises two ellipsograph legs. The utility model is characterized in that one end of an ellipsograph leg and one end of the other ellipsograph leg are mutually hinged, and the other end of each ellipsograph leg is respectively fixed with a needle point; the end parts of the needle points are respectively provided with a through hole; a thin line passes through the through holes; one end of the thin line is fixed to one ellipsograph leg, and the other end of the thin line is connected with a thin line length adjusting fixer positioned on the other ellipsograph leg; the thin line between the needle points is sheathed with a drawing pencil. The ellipsograph of the utility model has the advantages of simple structure and convenient operation.

Description

Ellipsograph

The utility model relates to the other than ring type curve plotter, and particularly a class is painted the ellipsograph of oval usefulness.

The structure more complicated of existing ellipsograph, it is also convenient inadequately to use.

The purpose of this utility model is the ellipsograph that will provide a class formation simple, easy to use.

Task of the present utility model is finished as follows.

A kind of ellipsograph, comprise two rule pin, one end of described two rule pin is hinged, the other end of two rule pin is fixed with a needle point respectively, its characteristics are that described two needle tip portions are provided with one respectively and transfer the hole, are installed with fine rule in the described two through hole, and described fine rule one end is fixed on the rule pin, the other end of described fine rule is connected on the fine rule length adjustment fixator of another rule on pin, is with drawing pen on the fine rule between described two needle points.

The fine rule length adjustment fixator of the utility model ellipsograph can be formed described pad by pad, compressing tablet and housing pin, compressing tablet is connected on the rule pin by housing pin.

The drawing pen of the utility model ellipsograph can connect pen core by penholder and be formed, and described penholder bottom is provided with the through hole that can pass fine rule.

The drawing pen of the utility model ellipsograph can be made up of pen-holding device and pen core two parts, is provided with the through hole of clamping pen core but described pen-holding device comprises moving sheet, described moving sheet, and described moving sheet one side is provided with the earhole that can pass fine rule.

A kind of ellipsograph, comprise two rule pin, one end of described two rule pin is hinged, the other end of two rule pin is fixed with a needle point respectively, the top that it is characterized in that described two rule pin, one end hinge is provided with handle, the bottom of described hinge is provided with locking pin, a described needle point and the mutual vertical fixing of rule pin one end, described another needle point and another mutual vertical fixing of rule foot portion, described two needle tip portions are provided with a through hole respectively, be installed with fine rule in the described two through hole, one end of described fine rule is fixed on the rule pin, the other end of described fine rule is connected on the fine rule length adjustment fixator of another rule on pin, is with drawing pen on the fine rule between described two needle points.

The utility model ellipsograph is according to the definition of ellipse design, promptly " if on the plane in moving point to two fixed points equal fixed length apart from sum, this does not move track of putting and is called ellipse for that.These two fixed points are called focus, and the distance between two focuses is called focal length ".Described fixed length is a long axis of ellipse, represents with 2a, if oval minor axis is 2b, and Tuo Yuan focal length 2C=(2a) then ²-(2b) ²Utilize fine rule length adjustment fixator that the fine rule length setting between described two needle points is 2a, according to the minor axis 2b and the formula 2c=(2a) of ellipse ²-(2b) ²Calculate bifocal F ₁And F ₂Between apart from 2c.On paper plane, paint a straight line, according to the 2c that calculates Chosen Point F on this straight line ₁, F ₂The position, then two needle points are placed F respectively ₁And F ₂On two fixed points, supporting positive cover at the drawing pen on the fine rule, drawing pen is being tightened under the condition of fine rule in paper plane, move along fine rule, at this moment, the nib of drawing pen is equivalent to a moving some P, its movement locus is subjected to fine rule length 2a (fixed length) and two F that fix a point ₁, F ₂The restriction of position, the figure that the motion nib is drawn out are major axis and equal the ellipse that 2a, minor axis equal 2b.Because the utility model ellipsograph just change slightly to existing compasses structure, has increased several parts seldom, and construct and use all very simple, almost do not increase production cost.The structure of the utility model ellipsograph and use have very shown oval definition visually, during therefore as the employed a kind of drawing instrument of numerous middle school student, also very help the understanding of student to ellipse definition and character.

Below with reference to accompanying drawing structure of the present utility model is described in further detail.

Fig. 1 is the D structure schematic diagram of a kind of ellipsograph of the utility model.

Fig. 2 is fine rule length adjustment fixator of the present utility model and an exploded perspective organigram of advising between the pin.

Fig. 3 is one of drawing pen D structure schematic diagram of the present utility model.

Fig. 4 is two of a drawing pen D structure schematic diagram of the present utility model.

Fig. 5 is the front view and the left view of another similar ellipsograph of the utility model.

Fig. 6 is the user mode reference diagram of the utility model ellipsograph.

Consult Fig. 1, the utility model ellipsograph comprises

rule pin

1 and 2, described two rule pin, one end is hinged, and the other end of rule pin 1 is fixed with needle point 3, and needle point 3 ends are provided with through hole 5, the other end of rule pin 2 is fixed with needle point 4, the end of needle point 4 is provided with through hole 6, and an end of fine rule 7 is fixedly connected on the rule pin 2, passes the through hole 6 of needle point 4 ends then, pass the through hole 15 of drawing pen bottom, the through hole 5 that passes needle point 3 ends is connected on the fine rule length adjustment fixator 8 of advising on the pin 1.Consult Fig. 2, described fine rule length adjustment fixator comprises pad 10, compressing tablet 11 and housing pin 12, and by housing pin described pad and compressing tablet is connected on the rule pin 1.During use, unscrew housing pin 12, fine rule 7 is placed between pad 10 and the compressing tablet 11, screw housing pin after adjusting the length of fine rule, can make fine rule keep fixed length.Consult Fig. 1, Fig. 3, the pen of painting among the figure comprises that penholder 13, described penholder bottom are provided with through hole 15 and are connected with pen core 14, described pen core can the draw pencil line or the ink line of drawing, and through hole 15 is used to pass through fine rule 7.Consulting Fig. 4, Fig. 5, is another similar ellipsograph of the utility model shown in the figure.Needle point 3 and rule pin 1 mutual vertical fixing, needle point 3 lower ends are provided with through hole 5.Needle point 4 and rule pin 2 mutual vertical fixing, needle point 4 ends are provided with through hole 6.Drawing pen is made up of the moving sheet 16 and the pen core 14 of band earhole 18, through hole 17, described pen core can the draw pencil line or the line of ink marker.Fine rule 7 one ends are fixed on the rule pin 2, the other end of fine rule 7 pass needle point 4 ends through hole 6, pass earhole 18 on the moving sheet 16, pass on the fine rule length adjustment fixator 8 that is connected to behind the through hole 5 of needle point 3 ends on the rule pin 1.Handle 19 is set on the hinge tops of two rule pin one ends, in the hinge bottom locking pin 20 is set ellipsograph is placed on the paper plane reposefully, with handled easily with improve drawing quality.Fig. 6 represents the user mode of the utility model ellipsograph, and fine rule 7 is adjusted to fixed length 2a (major axis) by fine rule length adjustment fixator 8, with the distance adjustment between

needle point

3 and 4 to 2c (focal length).Ellipsograph is placed on the paper plane focal point F that

needle point

3,4 is dropped into respectively on the transverse ₁And F ₂On the position, utilize pen core to tighten fine rule 7 and slow mobile drawing pen can be drawn out predetermined ellipse.The moving sheet 16 and the pen core 14 of band earhole 18 can prevent that fine rule from sliding up and down, with the precision that guarantees to draw.The moving sheet structure of band earhole can also make moving sheet not run into the elliptic curve of having drawn, to keep the clean and tidy of drawing.

Claims

1, a kind of ellipsograph, comprise rule pin (1), (2), one end of described two rule pin is hinged, the other end of two rule pin is fixed with needle point (3) and (4) respectively, it is characterized in that described needle tip portion is provided with through hole (5), (6) respectively, be installed with fine rule (7) in the described two through hole, an end of described fine rule is fixed on the rule pin, the other end of described fine rule is connected on the fine rule length adjustment fixator (8) of another rule on pin, is with drawing pen on the fine rule between described two needle points.

2, ellipsograph according to claim 1 is characterized in that described fine rule length adjustment fixator is made up of pad (10), compressing tablet (11) and housing pin (12), and described pad, compressing tablet are connected on the rule pin by housing pin.

3, ellipsograph according to claim 1 and 2 is characterized in that described drawing pen connects pen core (14) by penholder (13) and formed, and described penholder bottom is provided with the through hole (15) that can pass fine rule (7).

4, ellipsograph according to claim 1 and 2, it is characterized in that described drawing pen is made up of pen-holding device and pen core (14) two parts, described pen-holding device comprise moving sheet (16) but, described moving sheet is provided with the through hole (17) of clamping pen core (14), described moving sheet one side is provided with the earhole (18) that can pass fine rule (7).

5, a kind of ellipsograph, comprise rule pin (1), (2), one end of described two rule pin is hinged, the top of the other end hinge of two rule pin is provided with handle (19), the bottom of described hinge is provided with locking pin (20), needle point (3) and rule pin (1) are vertical fixing mutually, needle point (4) and rule pin (2) are vertical fixing mutually, described two needle tip portions are provided with through hole (5) respectively, (6), be installed with fine rule (7) in the described two through hole, one end of described fine rule is fixed on the rule pin, and the other end of described fine rule is connected on the fine rule length adjustment fixator (8) of another rule on pin, is with drawing pen on the fine rule between described two needle points.

6, ellipsograph according to claim 5 is characterized in that described fine rule length adjustment fixator is made up of pad (10), compressing tablet (11) and housing pin (12), and described pad, compressing tablet are connected on the rule pin by housing pin.

7, according to claim 5 or 6 described ellipsographs, it is characterized in that described drawing pen connects pen core (14) by penholder (13) and formed, described penholder bottom is provided with the through hole (15) that can wear fine rule (7).

8, according to claim 5 or 6 described ellipsographs, it is characterized in that described drawing pen is made up of pen-holding device and pen core (14) two parts, described pen-holding device comprise moving sheet (16) but, described moving sheet is provided with the through hole (17) of clamping pen core (14), described moving sheet one side is provided with the earhole (18) that can pass fine rule (7).