CN2326451Y

CN2326451Y - Ellipsograph

Info

Publication number: CN2326451Y
Application number: CN 98226450
Authority: CN
Inventors: 吴毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-09
Filing date: 1998-04-09
Publication date: 1999-06-30
Anticipated expiration: 2008-04-09

Abstract

The utility model relates to a drawing tool, including two branch gauge arms and the handle of connection on dividing the arm, two isometric, can be to the axis pivoted branch gauge feet of two branch gauge arms of articulated respectively at two branch gauge arm lower extremes, set up the indent on dividing the gauge feet respectively, put the cover shell outside the handle, the cover shell outer joint is made the drawing pole, sets up the indenture on making the drawing pole, encircles the silk thread outside two indents and indenture, sets up the tightener on the silk thread. The utility model discloses the principle is reliable, can draw required ellipse fast, conveniently.

Description

Ellipsograph

The utility model relates to a kind of drafting instrument.

People are seeking always and a kind ofly can draw oval Method and kit for quickly and accurately for many years, but all only rest on the approaching method oval not too accurately level of drawing.

The utility model purpose is to provide a kind of easy, accurate drawing oval ellipsograph for people.

The utility model comprises two divider arms and is connected two handles on the divider arm, below two divider arms, link two divider pin isometric, that can rotate to the axis of two divider arms respectively, isometric position is provided with indent respectively apart from the lower end at two divider pin, outside handle, be nested with sheath body, sheath body is fixed a horizontal cross bar outward, on cross bar, be nested with the orthogonal bend pipe of transverse arm and straight-arm, the straight-arm of bend pipe connects the bar of drawing a picture, the bar lower end is provided with indenture drawing a picture, around silk thread, tightener is set on silk thread at two indents and indenture.

Above-mentioned cross bar elasticity is nested with in the transverse arm of bend pipe.

The above-mentioned straight-bar and the straight-arm of bend pipe are nested with mutually, are provided with positioning key between straight-bar and straight-arm.

When needs are drawn an ellipse, regulate two divider arms and divider pin, make two divider pin all perpendicular to making picture, and be positioned at the focus place, and adjust the bar of drawing a picture, make two indents of divider pin and the indenture on the bar of drawing a picture be in parallel and do the plane of drawing, adjust tightener, make the twice of the length of silk thread, then, rotate the required ellipse that promptly draws in one week of sheath body for oval (a+c).

The utility model utilizes the oval every bit of going up to the bifocal principle equal apart from sum, and is simple in structure, easy to use, the ellipse figure accurately of painting out quickly and easily.

Now in conjunction with the accompanying drawings, embodiment is described.

Accompanying drawing is the utility model structural representation.Among the figure, 1 handle, 2 divider arms, 3 divider arms, 4 divider pin, 5 divider pin, 6 bend pipes, 7 draw a picture bar, 8 dog screws, 9 springs, 10 sheath bodies, 11 cross bars, 12 screws, 13 screws, 14 silk threads, 15 indents, 16 indents, 17 indentures, 18 clips.

On isometric divider pin 4,5, same area is carved next indent 15,16 respectively, and two divider pin 4,5 are connected divider arm 2,3 lower ends by screw 12,13 respectively, and the upper end of divider arm 2,3 is connected in the handle 1.

Make the orthogonal bend pipe 6 of two arms with stainless steel, the transverse arm of bend pipe 6 is a rectangular tube, cover one spring 9 in the transverse arm of bend pipe 6, cover one bar 7 of drawing a picture in the straight-arm of bend pipe 6, and on the straight-arm of bend pipe 6, offer the screw thread duck eye, the dog screw 8 that is spirally connected on duck eye is scribed indenture 17 in the lower end of the bar 7 of drawing a picture.

Cuboid cross bar 11 vertical with sheath bodies 10, an end of cross bar 11 is fixedly connected on the upper end of sheath body 10 with screw thread, sheath body 10 is enclosed within outside the handle 1 outward.

Cross bar 11 is inserted the transverse arm of bend pipe 6.

The silk thread of being made by steel wire 14 is looped around outside the divider pin 4,5 and the bar 7 of drawing a picture, and silk thread 14 is dropped in indent 15,16 and the indenture 17, uses clip 18 to clamp at the two ends of silk thread 14.

Claims

1, ellipsograph, comprise two divider arms and be connected two handles on the divider arm, it is characterized in that below two divider arms, linking respectively two isometric, the divider pin that can rotate to the axis of two divider arms, on two divider pin, indent is set respectively, and two indents are not held equidistantly apart from the divider pin, outside handle, be nested with sheath body, sheath body is fixed a horizontal cross bar outward, on cross bar, be nested with the orthogonal bend pipe of transverse arm and straight-arm, straight-arm connects the bar of drawing a picture, in the bar lower end of drawing a picture indenture is set,, tightener is set on silk thread at two indents and indenture outer shroud wrapping wire line.

2,, it is characterized in that described cross bar elasticity is nested with in the transverse arm of bend pipe according to the described ellipsograph of claim 1.

3, according to the described ellipsograph of claim 2, it is characterized in that the straight wall of described straight-bar and bend pipe is nested with mutually, be provided with positioning key between straight-bar and straight-arm.