CN202439434U

CN202439434U - Ellipsograph

Info

Publication number: CN202439434U
Application number: CN2012200120885U
Authority: CN
Inventors: 张其升; 张春玲; 张春丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-12
Filing date: 2012-01-12
Publication date: 2012-09-19
Anticipated expiration: 2022-01-12

Abstract

The utility model discloses an ellipsograph capable of drawing an ellipse. The ellipsograph consists of an extension rod, a painting brush rod, a ruler and a protractor. The extension rod is connected with the painting brush rod through a fixed block. The top end of the painting brush rod is pivoted on the fixed block. A supporting bracket is arranged between the extension rod and the painting brush rod. The supporting bracket is provided with a slideway. The extension rod and the painting brush rod are fixedly arranged on the supporting bracket through a snap ring. A fastening screw is arranged behind the snap ring which can slide in the slideway after the fastening screw is opened to change the included angle between the extension rod and the painting brush rod. The protractor is vertically and fixedly arranged on the ruler and the bottom tip of the extension rod is inserted into the ruler at a central origin of a bottom edge of the protractor. The ellipsograph provided by the utility model has the beneficial effects of simple structure and convenience in use and ellipses meeting the requirements can be drawn at one time, thereby reducing the trouble in drawing ellipses.

Description

Ellipsograph

Technical field

The utility model relates to a kind of drafting instrument, the particularly a kind of ellipsograph that can draw ellipse.

Background technology

At present, compasses used in the drafting instrument can only be drawn circle, can not draw ellipse; Also need adopt additive method to carry out when needing picture oval, cumbersome, and also the ellipse that draws is also lack of standardization; Therefore be badly in need of the disposable ellipse that just can draw of a kind of drafting instrument, reduce the trouble in the drawing.

Summary of the invention

The purpose of the utility model is the ellipsograph that can draw ellipse that in drawing course, not to have corresponding drafting instrument can disposablely draw oval problem and provide in order to solve.

The utility model is made up of expansion link, paintbrush bar, ruler and protractor, and wherein expansion link and paintbrush bar connect through fixed block, and expansion link can be adjusted height; The top of paintbrush bar is articulated on the fixed block, is provided with bracing frame between expansion link and the paintbrush bar, and bracing frame is provided with slideway; Expansion link and paintbrush bar are fixed on the bracing frame through snap ring, are provided with holding screw behind the snap ring, open the holding screw snap ring and can in slideway, slide to change the angle between expansion link and the paintbrush bar; Protractor is vertically fixed on the ruler, and the vertex (vertices) of expansion link is plugged on the ruler at middle initial point place, protractor base, and the position of vertex (vertices) is the position of ruler initial point; Offer chute on the protractor, be fixed with fixture block on the expansion link, the other end of fixture block is located in the chute of protractor; Through fixture block expansion link and protractor are linked at the chute place; Be provided with holding screw behind the fixture block, open the holding screw fixture block and can in chute, slide, fixture block can make expansion link be fixed on arbitrarily angled place.

The operation principle of the utility model:

The ellipse of Any shape all has a major radius and short radius, at first utilizes oval major radius or short radius formula, calculates the number of degrees at oval angle; Be fixed on this place, ellipse angle to the described ellipsograph expansion link of the utility model through fixture block then; This moment, the nib of paintbrush bar needed the oval short radius numerical value of picture to begin to execute one week of picture from ruler, and what draw is exactly required ellipse, and for example: draw a major radius is that 3cm, short radius are the ellipse of 2cm; At first utilize the major radius formula calculate oval angle be 48 ° 11 '; Be fixed on place, this ellipse angle to expansion link then, this moment the nib of paintbrush bar to beginning to execute picture apart from the position of expansion link vertex (vertices) 2cm, when executing when signing in the protractor place at ruler; Improve retracting rods paintbrush bar and skip the protractor place, execute the ellipse that picture can draw after one week and require.

The beneficial effect of the utility model:

Simple in structure, easy to use, once just can execute the satisfactory ellipse that draws, reduced and executed the oval trouble of picture.

Description of drawings

Fig. 1 is the utility model overall structure sketch map.

1, expansion link 2, paintbrush bar 3, ruler 4, protractor 5, fixed block 6, bracing frame 7, slideway 8, snap ring 9, chute 10, fixture block.

The specific embodiment

See also shown in Figure 1: the utility model is made up of expansion link 1, paintbrush bar 2, ruler 3 and protractor 4, and wherein expansion link 1 connects through fixed block 5 with paintbrush bar 2, and expansion link 1 can be adjusted height; The top of paintbrush bar 2 is articulated on the fixed block 5, is provided with bracing frame 6 between expansion link 1 and the paintbrush bar 2, and bracing frame 6 is provided with slideway 7; Expansion link 1 is fixed on the bracing frame 6 through snap ring 8 with paintbrush bar 2, is provided with holding screw behind the snap ring 8, opens holding screw snap ring 8 and can in slideway 7, slide to change the angle between expansion link 1 and the paintbrush bar 2; Protractor 4 is vertically fixed on the ruler 3; The vertex (vertices) of expansion link 1 is plugged on the ruler 3 at middle initial point place, protractor 4 bases, and the position of vertex (vertices) is the position of ruler 3 initial points, offers chute 9 on the protractor 4; Be fixed with fixture block 10 on the expansion link 1; The other end of fixture block 10 is located in the chute 9 of protractor 4, through fixture block 10 expansion link 1 and protractor 4 is linked at chute 9 places, is provided with holding screw behind the fixture block 10; Opening holding screw fixture block 10 can slide in chute 9, and fixture block 10 can make expansion link 1 be fixed on arbitrarily angled place.

Claims

1. ellipsograph is characterized in that: be made up of expansion link, paintbrush bar, ruler and protractor, wherein expansion link and paintbrush bar connect through fixed block; The top of paintbrush bar is articulated on the fixed block, is provided with bracing frame between expansion link and the paintbrush bar, and bracing frame is provided with slideway; Expansion link and paintbrush bar are fixed on the bracing frame through snap ring, are provided with holding screw behind the snap ring, and protractor is vertically fixed on the ruler; The vertex (vertices) of expansion link is plugged on the ruler at middle initial point place, protractor base; Offer chute on the protractor, be fixed with fixture block on the expansion link, the other end of fixture block is located in the chute of protractor; Through fixture block expansion link and protractor are linked at the chute place, be provided with holding screw behind the fixture block.