CN2372150Y

CN2372150Y - Ellipsograph

Info

Publication number: CN2372150Y
Application number: CN 99212555
Authority: CN
Inventors: 徐世春
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-22
Filing date: 1999-05-22
Publication date: 2000-04-05
Anticipated expiration: 2009-05-22

Abstract

The utility model relates to an ellipsograph which is composed of a scale (1), a vernier (3) and a regular rope (4). A regular rope hole (7), a rope fixing screw (5) and a vernier screw (6) are arranged on the vernier (3). The utility model can be used for accurately drawing various ellipses on a plane.

Description

A kind of ellipsograph

The utility model relates to the oval device of a kind of drawing in the plane, belongs to the stationery field.

Draw ellipse in the plane, " two nails, one line " commonly used method promptly fixes on single line on the bifocal with two nails, is supportting the line drawing ellipse with pen again.Though this method is feasible because its nail, line, chi be not integral, thereby use very inconvenient, the also difficult control of drawing accuracy.In order to address this problem, the patent application (97215267.9) of people from Shandong Li Hongtang has proposed " chi line one " scheme.But because its pen cap there is no need at all, the very difficult ellipse of painting accurately of this device thereby is used again not on the center line or edge line of chi in the two ends of line.

The purpose of this utility model is that a kind of improved ellipsograph will be provided, available its various ellipse that draw accurately in the plane.

The purpose of this utility model is achieved in that an end of rule rope is through in the focus hole at scale left end 0 scale place, penetrates the vernier hole with the other end again.When drawing ellipse, vernier is fixed on certain scale of vernier scale with the vernier screw, can determines focal length.Can determine on the oval axle according to rope length.After axial length is determined, it is long fixing to restrict with the vernier screw, just can draw certain ellipse with nib along the rule rope, because rule rope of the present utility model two ends are fixed on the scale label edge, the line of two fixing points and scale coincident, thereby it is more accurate to draw, and this is an advantage of the present utility model.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the profile according to a kind of ellipsograph that the utility model proposes.Describe the details and the working condition of this a kind of ellipsograph in detail below in conjunction with Fig. 1.

The utility model comprises a scale (1), and 0 scale end of scale (1) is made a call to a focus hole (2) along 0 graduation mark, and a vernier (3) is housed on the scale (1).One end of rule rope (4) is through in the focus hole (2), and the other end is through in the vernier hole (7) on the vernier (3), can will advise rope (4) according to required rope length by the screw of restricting admittedly (5) and fix.Vernier (3) can slide along scale (1), and vernier screw (6) can be fixed on vernier (3) on certain scale of scale (1).

When drawing ellipse, earlier be fixed on vernier (3) on the corresponding scale of scale (1) with vernier screw (6) according to focal length, long according to axial length again with scale (1) angle gauge block rope, with the screw of restricting admittedly (5) other end of rope is fixed, supportted rule rope (4) ellipse that can draw in the plane with nib then.

Claims

1, a kind of ellipsograph is characterized in that being drilled with a focus hole (2) at 0 scale place of its scale (1), near scale (1) scale edge a rule rope hole (7) is arranged on its vernier (3), and rule ropes (4) can be through in focus hole (2) and the rule rope holes (7).