CN2411902Y

CN2411902Y - Ellipsograph

Info

Publication number: CN2411902Y
Application number: CN 99258966
Authority: CN
Inventors: 帕尔哈提·努尔
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-29
Filing date: 1999-12-29
Publication date: 2000-12-27
Anticipated expiration: 2009-12-29

Abstract

The utility model discloses a pair of elliptical compasses, which relates to a teaching or drawing instrument, particularly a pair of elliptical compasses for drawing an ellipse. The elliptical compasses are composed of dividing compasses, tip feet, a flexible line, etc. A parallelogram structure is totally adopted by the tip feet and a pen foot, and the tip feet and the pen foot are perpendicular to a paper surface. Pen clamping feet of the dividing compasses are provided with small holes, one side of the flexible line is fixed on one side leg, and the other side of the flexible line passes through a pen clamping member and the tip feet and is fixed on the end of the other tip foot. When the ellipse is drawn, the length of the utility model automatically extends following the change of an opening angle to ensure a drawing pen point and two tip feet to be on the same plane always, and the purpose that the ellipse can be accurately drawn is obtained.

Description

A kind of ellipsograph

The utility model relates to a kind of teaching or drawing instrument, especially a kind of ellipsograph of drawing ellipse.

In the existing technology, exist the accuracy of ellipsograph not high enough, long and short distance and focal position are bad determines complex structure, problems such as cost height.

The utility model provides a kind of ellipsograph at the problems referred to above, and oval principle and the parallelogram principle with being a constant that between a bit any and the bifocal of use reached the oval purpose of can drawing exactly.

The purpose of this utility model is achieved in that ellipsograph is made of divider, spur, flexible cord etc., and a spur and a pin all adopt parallelogram sturcutre, makes a spur and a pin perpendicular to paper.The pen clip pin of divider has aperture, and another side passes the pen clip part and spur is fixed on another spur end on one side flexible cord is fixed on the side leg.Automatic stretching guarantees paintbrush point and two spurs all the time at grade with the variation of subtended angle degree to draw oval its length.

Describe below in conjunction with drawings and Examples:

Fig. 1 is an example structure schematic diagram of the present utility model

Fig. 2 is a fixture enlarged diagram of the present utility model

Divider 1, screw 2, nut 3, screw 4, flexible cord 5, ring 6, side leg 7, fixture 8, thin cuboid frid 9, little cuboid plate 10, flexible cord frid 11, gulf shape plate 12, clamp piece 13, spur 14, a pin 15, pen clip 16, pen clip part 17, spring 18, line 19, screw 20

Ellipsograph is made of divider 1, side leg 7, spur 14, flexible cord 5 etc., and a spur 14 and a pin 15 all adopt parallelogram sturcutre, makes a spur 14 and a pin 15 perpendicular to paper.The pen clip part 17 of divider 1 has aperture, Yi Bian flexible cord 5 is fixed on the ring 7, another side is fixed on side leg top, and line 19 1 ends are fixed on the ring 7, and another side passes pen clip part 17 and pen clip 16 is fixed on another clamp piece 13.Automatic stretching guarantees painting brush foot 15 and two spurs 14 all the time at grade with the variation of subtended angle degree to draw oval its length.

Divider 1 top is that cylinder is wound with spring on it, and bottom is a quadrangle, and its effect is can not move up and down behind the fastening nut 3, guarantees oval accuracy rate.Divider 1 lower end is fixed with fixture 8, make spur 14 fixed-site on paper by fixture 8, fixture 8 is upper and lower respectively to pass thin cuboid frid 9, two end limits of thin cuboid frid 9 are fixed on the little cuboid plate 10 by its upper and lower two cuboid frids 9 both sides of two screws, and its lower end is a spur 14.Fixture 8 bottoms are that a gulf shape plate 12 is arranged, and divider 1 lower end is fixed on the gulf shape plate 12 with screw.

17 are the pen clip part, its top has screw that pen clip part 17 is fixed on the side leg 7, and 18 is spring, and 15 is a pin, 16 for the pen clip bottom be pencil, flexible cord 5 is controlled length by the subtended angle of side leg 7, and pen clip part 17 is to control long distance and short distance by side leg 7, and it is to reserve length apart from fixing afterwards the position that a fixed screw 4 is arranged on the side leg 7, pen clip part 17 is to link to each other in side leg 7 by screw 20, screw 20 slides in pen clip part 17 grooves, and pen clip part 17 lower ends are to be used for pen clip, and spring 18 is to be used for fixed its height.

It is fixing that fixture 8 is used for screw.Fix two cuboids with two screws.

After its focal length and long and short position are determined during use, screw 2 and screw 4 tightened get final product.

Claims

1, a kind of ellipsograph, mainly include divider (1), screw (2), nut (3), flexible cord (5), side leg (7), fixture (8), thin cuboid frid (9), little cuboid plate (10), clamp piece 13, spur 14, part formations such as (17), it is characterized in that: there is screw (2) divider (1) top, nut (3), fixture (8) is arranged at divider (1) bottom, pass thin cuboid frid (9) in the middle of it, both sides are fixed by little cuboid plate (10) clamp piece (13) under it, spur (14), divider (1) is to be connected by screw (4) with side leg (7), divider (1) upper cylinder, be wound with spring on it, bottom is a quadrangle, and a part (17) is arranged at side leg (7) bottom.

2, a kind of ellipsograph as claimed in claim 1, it is characterized in that: a part (17) of divider (1) has aperture, flexible cord (5) is fixed on one side side leg (7) and goes up that another side passes pen clip part (17) and spur (14) is fixed on another spur (14) end, draws oval its length and changes with the subtended angle degree and automatic stretching.