CN2431121Y

CN2431121Y - Pare-curve drawing instrument

Info

Publication number: CN2431121Y
Application number: CN 00241869
Authority: CN
Inventors: 江一龙; 崔少烨
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-27
Filing date: 2000-06-27
Publication date: 2001-05-23
Anticipated expiration: 2010-06-27

Abstract

The utility model relates to a sector for drawing parabolas, which is composed of an E-shaped rack (1), a directrix tringle (2), a deformable rhombus frame (3), a cartridge holder (5) and the guide rail (4) thereof, focus needles (6), a shift fork (7), a directrix slide block (8) and length rulers (9). As long as the positions of directrixes are determined as required, the directrix slide block (8) is pushed to slide along the directrix tringle (2), and a pen in the cartridge holder (5) can draw parabolas on a piece of paper below the pen.

Description

Para-curve gauge

The utility model relates to a kind of drawing stationery.

About parabolical drafting, the method that the student adopts now usually is to set up coordinate earlier on paper, then is to retouch out the some points that close this equation of symbol, is in turn connected into image then.This is a kind of not only time-consuming but also is difficult to guarantee the classical operating type of accuracy.

Now existing people adopts instrument to draw parabola.For example adopting the patent No. is that the para-curve gauge of ZL97215495.7 just can be drawn required image comparatively fast more accurately.But owing on this apparatus structure, can only draw half parabola for one, when painting in addition half, the pen core seat of must removing stage makeup and costume again, so very inconvenient during operation.

The purpose of this utility model is that a kind of novel para-curve gauge will be provided, and it can disposablely draw whole parabolical image.

The purpose of this utility model is achieved in that and places a straight-bar that in the pin on two relative summits of a deformable diamond as the guide rail of pen core seat, the pen core seat can move thereon.One in other two relative summits of this diamond by the left end of nail (hereinafter to be referred as the focus pin) pin of a band tip at " Ji " shape frame middle part hyphen bar, another summit is connected on the slide block, this slide block (hereinafter to be referred as the directrix slide block) can be gone up along the straight-bar (hereinafter to be referred as directrix tringle) of a frame on the two long transverse lever left ends of " Ji " frame and move, from the directrix slide block stretch out one with the perpendicular fork of directrix tringle, make it to stir the pen core seat and on pen core seat guide rail, move.So just guaranteed that the pen core seat equates with the distance of focus pin to the directrix tringle.In order to determine the position of parabola directrix, on two long transverse levers of " Ji " shape frame, be carved with length scales from right to left.

The utility model is owing to placed the guide rail of a straight-bar as the pen core seat in the pin on two relative summits of deformable diamond, fork can make the pen core seat do omnidistance moving thereon again, so needn't load and unload any one parts more midway during mapping, and structure is extremely simple.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the vertical view according to the para-curve gauge that the utility model proposes.

Describe details and working condition in detail below in conjunction with Fig. 1 according to the concrete device that the utility model proposes.

This para-curve gauge comprises " Ji " shape frame (1), directrix tringle (2), deformable diamond (3), pen core seat guide rail (4), pen core seat (5), focus pin (6), fork (7), directrix slide block (8), length scales (9).

Rely on directrix tringle (2) to fix the position of parabola directrix, promote slide block (8) then and before and after directrix tringle (2) is gone up, live multiple the slip, pen core seat (5) is under the stirring of fork (7), then on pen core seat guide rail (4), swing back and forth, the pen in the pen core seat just can paper thereunder on one draw the parabola image of being asked.

Claims

1, para-curve gauge, this device is made up of " Ji " shape frame (1), directrix tringle (2), deformable diamond (3), pen core seat guide rail (4), pen core seat (5), focus pin (6), fork (7), directrix slide block (8), length scales (9), it is characterized in that the right summit of deformable diamond (3) is fixed on the left end of " Ji " shape frame middle part hyphen bar by pin.

2, para-curve gauge according to claim 1 is characterized in that not establishing " Ji " shape frame (1) and directrix tringle (2).