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Elliptic trammel

An ellipse and compass technology, applied in the field of learning and work supplies, can solve the problems of inaccurate graphics, unsuitable for middle school students to learn, complex skills, etc., and achieve the effect of convenient adjustment and fixation

Inactive Publication Date: 2014-07-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In daily study and work, it is often necessary to draw ellipses. In some occasions, hand-painted methods can be used, and the graphics are not accurate
In some occasions, such as mechanical drawing, the approximate drawing method is used, and the drawing method is cumbersome
Middle school students often draw ellipses, and ellipse graphics are also used in math problems. The technique of drawing approximate ellipses is complicated, which is not suitable for middle school students.
Although there are already a variety of ellipse gauge designs, drawing an ellipse is still a headache

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0036] see figure 1 , figure 2 , image 3 , Figure 4 , the elliptical gauge of the present invention comprises a steering knuckle 1, a pinion gear 2, a first connecting piece 3, a fixed stud 4, a large gear 5, a fixed gear 6, a fixed gear shaft 7 and a first connecting pin used to connect with a compass. Two connectors 8 .

[0037] Cooperate see Figure 11 , Figure 12 , the steering knuckle 1 in the present invention includes an upper piece 11 and a lower piece 12, the upper part of the upper piece is provided with a card slot 111 for connecting with a foot of a compass, and the lower part of the lower piece is provided with a disc for connecting with the pinion shaft 121. The upper piece and the lower piece are adjustable and connected through a bolt assembly, and the upper piece and the lower piece are adjustable and connected through a bolt assembly. The pinion 2 is fixedly connected with the lower end of the lower plate 12 .

[0038] Cooperate see Figure 13 , t...

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PUM

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Abstract

The invention discloses an elliptic trammel. The elliptic trammel comprises a steering knuckle connected with one leg of a pair of compasses, and a small gear, a first connecting piece, a fixing bolt, a large gear, a fixed gear, a fixed gear shaft and a second connecting piece. The elliptic trammel disclosed by the invention is applicable to be matched with a pair of common metal compasses for making ellipses in various sizes; the pair of common metal compasses can be used together with the elliptic trammel for use after pins are moved. According to the elliptic trammel, gear transmission is adopted; the deformation among components is small; the parameters of the gears are adjusted by adjusting the opening angle between two legs of the compass and the angle between the two connecting pieces; the elliptic trammel is convenient to adjust and fix.

Description

technical field [0001] The invention relates to a school work article, in particular to an ellipse gauge. Background technique [0002] In daily study and work, it is often necessary to draw ellipses. In some occasions, hand-painted methods can be used, and the graphics are not accurate. In some occasions, such as mechanical drawing, the approximate drawing method is used, and the drawing method is cumbersome. Middle school students often draw ellipses, and ellipse graphics are also used in math problems. The technique of drawing approximate ellipses is complicated and not suitable for middle school students to learn. Although there are already a variety of ellipse gauge designs, drawing an ellipse is still a headache. Contents of the invention [0003] The object of the present invention is to provide an ellipse gauge that is easy to use and accurate in drawing in order to solve the above problems. [0004] In order to achieve the above object, the present invention ad...

Claims

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Application Information

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IPC IPC(8): B43L11/05
Inventor 张景文陈真儒马新玲
Owner EAST CHINA UNIV OF SCI & TECH