CN2222071Y

CN2222071Y - Ellipse compasses

Info

Publication number: CN2222071Y
Application number: CN 95206398
Authority: CN
Inventors: 王刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-22
Filing date: 1995-03-22
Publication date: 1996-03-13
Anticipated expiration: 2005-03-22

Abstract

The utility model discloses an instrument for drawing ellipses, which is composed of a folding leg connected with a needle foot and another straight leg connected with a needle foot and a pen foot, wherein, the straight leg is a round bar which is provided with a movable sliding sleeve capable of free sliding and rotating, and the pen foot and the movable sliding sleeve are connected through a rotating shaft which is provided with a fastening screw. The utility model has the advantages of accurate drawing, easy use and low production cost.

Description

A kind of ellipsograph

The utility model relates to a kind of oval instrument of drawing.

What use morely in mechanical drawing is to make the oval a kind of approximate technique of painting---four heart circule methods by long and short axle.This technique of painting is inaccuracy not only, and technique of painting complexity, must divide four sections and finish.Another kind is to use oval template, and this obviously instrument can not be regulated oval size arbitrarily.The disclosed ellipsograph of Chinese patent ZL94205047.9 " a kind of scale tape formula ellipsograph " is on the basis of compasses, Convenient table to compasses adds a folding joint, compasses are added one section little axle with the end that shoulder is arranged of draw point, be used the ellipse of the dimensional requirement of drawing with the tape that has the aperture scale.Level and smooth inadequately and accurately owing to the ellipse that affects tape to make to draw with pen obviously.The disclosed ellipsograph of another Chinese patent ZL94209395.X " ellipsograph " is made up of the pivoted arm that combines as a whole and arm pull and rule body, the rule body is made up of rule dish and localization part, on the both ends of the surface of rule dish two orthogonal chutes are arranged, two crank-type locating pins are housed on the localization part, slide block axle and slide block are housed on pivoted arm and the arm pull, two slide blocks are inserted in two chutes of rule dish, after locating pin and quilt are drawn the thing location, turning handle, slide block then slides in two chutes of rule dish, thereby the chuck and the scriber that drive on the arm pull mark ellipse.This Ellipsograph structure is very complicated, uses also inconvenient.

The purpose of this utility model provides a kind of instrument of ellipse of the given size of accurately once drawing that is simple and easy to usefulness.

The purpose of this utility model is achieved in that the principle according to " tapered plane cuts cylinder; section line is oval ", designed a kind of ellipsograph that constitutes by a leg rolled over that is connected with stitch, straight leg that is connected with stitch and a pin, the said straight leg that is connected with stitch is a pole that the lower end is a needle-like, the one movable sliding sleeve that can be free to slide and rotate is arranged on the pole, pin is connected by rotating shaft with movable sliding sleeve, and trip bolt is arranged in the rotating shaft.

For ellipsograph work not being tilted forward and back the time and make it more stable, available crosspointer pin replaces common cushion pin and can roll over leg and is connected, and the plane of the plane of crosspointer pin formation and ellipsograph two legs formation is perpendicular.

Because tapered plane cuts cylinder, section line is oval, so the ellipse that draws with the utility model ellipsograph is a standard ellipse, rather than the approximate technique of painting.Owing to draw together a sliding sleeve drive pin around the straight leg axle complete ellipse that to draw that rotates a circle, and need not four sections arcs of picture, so very easy to use.Because only needing to change a little, the production of this ellipsograph can realize that structure is simpler on common compasses, so cost is low.

Embodiment elaborates to the utility model below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of an embodiment of the utility model ellipsograph.

Fig. 2 is the structural representation of part crosspointer pin of another embodiment three pin ellipsographs of the utility model ellipsograph.

As shown in Figure 1, the skeleton of this ellipsograph is made of the stock 2 and the quarter butt 3 that can be folded into three sections, 2 times termination cushion of stock pin 1, and the long draw point 4 of the oval centering of 3 times terminations of quarter butt, fastening with screw.Feeling relieved has a movable sliding sleeve 5 on the long draw point 4, can slide up and down and freely rotate along long draw point 4.On the movable sliding sleeve 5 flange 7 is arranged, flange 7 connects the pin extension bar 8 that can roll over, and a pin extension bar 8 and flange 7 are connected by fixed rotating shaft, and available nut 6 is fastening.Pin extension bar 8 can rotate around flange 7 in the plane that constitutes with long draw point 4, makes a pin extension bar 8 and the stitch of long draw point 4 open different angles.Pin extension bar 8 can connect pencil pin 9, also can connect the writing brush pin.

Earlier the long draw point 4 of ellipse centering is positioned on the elliptical center when drawing ellipse, cushion pin 1 is positioned certain point on the major axis extended line, and the plane that the ellipsograph bipod is constituted keeps vertical, pen with rotary pin extension bar 8 with paper all the time, make pencil pin 9 be positioned the ellipse short shaft end, then nut 6 is tightened.With movable sliding sleeve 5 half-twists, pencil pin 9 is dropped on the transverse again, bending stock 2 makes ellipsograph tilt to transverse, is positioned the transverse end up to pencil pin 9.Keep stock 2 motionless, around long draw point 4 pen with rotary pin extension bar 8 and movable sliding sleeves 5, circle, a complete ellipse on paper can draw.When long and short axle equated, what draw then was a circle.Stitch 1 cooperates with long draw point 4, also can measure line segment as divider and use.

If draw little ellipse, bent pin extension bar 8 furthers pencil pin 9 and long draw point 4 distances.If draw big ovally, can connect compasses annex extension rod respectively in stock 2 and 1 on cushion pin, quarter butt 3 and long draw point 4, pin extension bars 8 and 9 on pencil pin.

For ellipsograph work is not tilted forward and back the time, available crosspointer pin 10 replaces cushion pin 1, so also makes ellipsograph more firm.In use, the bipod of crosspointer pin 10 is laid respectively on two equidistant parallel lines of major axis, and the extended line of major axis is vertically divided the bipod line of crosspointer pin 10 equally.Crosspointer pin 10 is the little divider that a handle changes connection-peg in fact.

Claims

1, a kind of ellipsograph, constitute by a leg rolled over that is connected with stitch, straight leg that is connected with stitch and a pin, it is characterized in that the said straight leg that is connected with stitch is a pole that the lower end is a needle-like, the one movable sliding sleeve that can be free to slide and rotate is arranged on the pole, pin is connected by rotating shaft with movable sliding sleeve, and trip bolt is arranged in the rotating shaft.

2, ellipsograph according to claim 1 is characterized in that with rolling over the stitch that leg is connected be the crosspointer pin, and the plane that the crosspointer pin constitutes is perpendicular with the plane of ellipsograph two legs formation.