CN2830104Y

CN2830104Y - Portable and simple circle drawing device

Info

Publication number: CN2830104Y
Application number: CN 200520097775
Authority: CN
Inventors: 蔡相辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-24
Filing date: 2005-08-24
Publication date: 2006-10-25
Anticipated expiration: 2015-08-24

Abstract

The utility model provides a portable and simple circle-drawing device. The upper end of a round point rod, which is a ball head, is hinged with a pen clipping cap through a universal joint, the ball head and the round point rod are connected by a narrow neck, the pen clipping cap has a spherical fossa which is matched with the ball head that is then embedded in the spherical fossa and a narrow neck opening is arranged at the axially synclastic sides of the spherical fossa and the pen clipping cap. When the circle-drawing device is used, a pen is installed in the pen clipping cap, a nail end of the round point rod is nailed on a piece of paper, the round point rod is fixedly perpendicular to the paper, the protruded length of a pen head is adjusted according to the size of the circle to be drawn, a pen point is abutted on the paper, the pen is rotated by hand for a single rotation along the universal joint and then operation of drawing a circle is completed. Compared with a common circle-drawing device, the utility model has the advantages of smaller size, higher safety, simpler conformation, more convenient carryover and cheaper price and is especially suitable for students.

Description

The portable simple cyclograph

Technical field

The utility model relates to a kind of portable simple cyclograph, belongs to the picture circle stationery of study, teaching, drawing.

Background technology

At present, known cyclograph (compasses) structure is by swingle, round dot bar and draws round being formed by connecting.One with the round dot bar is the center of circle, and the rotation swingle makes the picture round bar at the object upper drawing circle.But this cyclograph (compasses) volume is big, cost is higher, hurt sb.'s feelings easily and inconvenience is carried.

Summary of the invention

The purpose of this utility model to be that existing cyclograph (compasses) volume is big, cost is higher in order overcoming, to hurt sb.'s feelings easily and inconvenient deficiency of carrying, a kind of portable simple cyclograph is provided, this cyclograph can not only be drawn circle, and volume is less, cost is lower, safety and being convenient for carrying.

The technical solution of the utility model: portable simple cyclograph of the present utility model comprises the round dot bar, it is characterized in that: the upper end of round dot bar and pen clip cover are hinged.

Described portable simple cyclograph, the upper end of round dot bar are bulbs, be connected by thin neck between bulb and the round dot bar, pen clip put with the bulb coupling spherical nest, bulb is embedded in the spherical nest, spherical nest and pen clip overlap axis in the same way side thin neck opening is arranged.

The beneficial effects of the utility model are, can draw round in,, safety, simple structure littler than cyclograph (compasses) volume and be convenient for carrying, and more cheap are particularly suitable for the student and use.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation that the spherical nest that reaches is overlapped in pen clip.

Fig. 3 is the side-looking structural representation of spherical nest

Fig. 4 is that the utility model is set up the design sketch of pen back at the paper upper drawing circle.

Among the figure: round dot bar 1, nail end 1-1, round dot bar nail end 4, pen clip cover 2, bulb 3-1, spherical nest 3-2,3-3 are that thin neck opening, the 3-4 on the spherical nest is thin neck, pen 5, paper 4.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further specified:

In Fig. 1, it is 2 hinged that round dot bar 1 and pen clip are overlapped.The upper end of round dot bar 1 is a bulb 3-1, is connected by thin neck 3-4 between bulb 3-1 and the round dot bar 1, have on the pen clip cover 2 with the bulb coupling spherical nest 3-2, bulb 3-1 is embedded in the spherical nest 3-2;

As Fig. 2, Fig. 3: spherical nest and pen clip cover axis side in the same way have thin neck opening 3-3, be convenient to angle between picture bowlder pen and the round dot bar 1 can be transferred to very little so that the picture roundlet.

Point bar 1 length 30mm-50mm, pen clip cover 2 is for there being the ring-type of opening, and flexible, interior diameter is slightly less than the penholder diameter of pencil commonly used and ball pen, so that penholder can not slide after going into.

Fig. 4 is that the utility model is set up the design sketch of pen back at the paper upper drawing circle: during use pen 5 is positioned in the pen clip cover 2, the nail end 1-1 nail of round dot bar 1 is on paper 4, round dot bar 1 is motionless perpendicular to paper, according to drawing the length that round size adjustment nib is stretched out, nib is against on the paper, rotate pen by hand and turn around, promptly finish the picture circle along universal joint 3.

Claims

1. a portable simple cyclograph comprises the round dot bar, it is characterized in that: the upper end of round dot bar and pen clip cover are hinged.

2. portable simple cyclograph according to claim 1, it is characterized in that: the upper end of round dot bar is a bulb, be connected by thin neck between bulb and the round dot bar, pen clip put with bulb coupling spherical nest, bulb is embedded in the spherical nest, and spherical nest and pen clip cover axis side in the same way have thin neck opening.