CN202557089U

CN202557089U - Simple compasses

Info

Publication number: CN202557089U
Application number: CN2012201524316U
Authority: CN
Inventors: 李其成
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-12
Filing date: 2012-04-12
Publication date: 2012-11-28
Anticipated expiration: 2022-04-12

Abstract

The utility model, which belongs to the school supplies field, relates to a pair of simple compasses, so that problems of inconvenient accurate semidiameter measurement as well as inconvenient usage of the traditional compasses can be solved. The pair of simple compasses comprises a leg, a ruler, a pen and a fixer. Specifically, the leg is a straight bar with a needle-shaped pointed tip; one end of the ruler is fixed at the middle portion of the leg and the other end thereof is inserted into the fixer sleeved at the outboard of the pen and is extended outside; and a fastening bolt is arranged on the fixer. According to the utility model, when the pair of simple compasses is used, the portion, arranged in the fixer, of the ruler is pulled and a semidiameter of a to-be-drawn circle can be measured accurately by utilizing the scale mark on the ruler; the leg is held by one hand and the pen is held by the other hand and is rotated by taking the leg as a center of a circle, so that a circle or a circular arc can be drawn. Besides, all components of the pair of simple compasses can be disassembled and used independently.

Description

A kind of simple and easy compasses

Technical field

The utility model relates to a kind of study article, specifically a kind of simple and easy compasses.

Background technology

Compasses are to be used for the instrument of picture circle and circular arc in mathematics and drawing; Use compasses in the process of drawing circle, must at first confirm the center of circle and radius, for guaranteeing drawing accuracy of gauge and picture quality, radius need use ruler to measure; So just need carry a lot of instruments simultaneously when using; Lose easily, and also will in time change after the wearing and tearing of the nib of compasses, otherwise can't normally use.

The utility model content

The purpose of the utility model is to provide a kind of simple and easy compasses, and these compasses have the characteristics of any assembling combination and partition use.

The technical scheme that its technical problem of the utility model solution is taked is: a kind of simple and easy compasses; Its structure comprises supporting leg, ruler, pen and fixator; Described supporting leg is the straight-bar that has the needle-like tip; Ruler one end is fixed on the midleg, and the other end is inserted in the fixator that is enclosed within the pen outside and extends to the outside, and described fixator is provided with a fastening bolt.

Described pen is slidingly connected with ruler under the drive of fixator.

The beneficial effect of the utility model is: during use, the position of pulling ruler in fixator utilizes the graduation mark on the ruler to accurately measure radius of a circle to be painted; With the supporting leg is the center of circle; One holds supporting leg, and another holds pen and rotation, and circle or circular arc can draw; Also can take each parts apart independent use, with the function that realizes writing, measuring; The utility model is simple in structure, and mounting or dismounting are convenient, uses flexibly, is easy to carry.

Description of drawings

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

Among the figure: 1 supporting leg, 2 rulers, 3,4 fixators, 5 fastening bolts.

The specific embodiment

As shown in Figure 1.A kind of simple and easy compasses; Its structure comprises supporting leg 1, ruler 2, pen 3 and fixator 4; Described supporting leg 1 is for having the straight-bar of needle-like tip; Ruler 2 one ends are fixed on supporting leg 1 middle part, and the other end is inserted in the fixator 4 that is enclosed within pen 3 outsides and extends to the outside, and described fixator 4 is provided with a fastening bolt 5.

Described pen 3 is slidingly connected with ruler 2 under the drive of fixator 4, can regulate the position of pen according to the size of the circle that will draw.

During use, the position of pulling ruler 2 in fixator 4 utilizes the graduation mark on the ruler 2 to accurately measure radius of a circle to be painted; Through fastening bolt 5 pen 3 being fixed on the ruler 2, is the center of circle with supporting leg 1, and one holds supporting leg 1; Another holds pen 3 and rotation, and circle or circular arc can draw; Also can take each parts apart independent use, with the function that realizes writing, measuring; The utility model is simple in structure, and mounting or dismounting are convenient, uses flexibly, is easy to carry, and especially is fit to the student and uses.

Claims

1. simple and easy compasses; It is characterized in that; Comprise supporting leg, ruler, pen and fixator, described supporting leg is the straight-bar that has the needle-like tip, and ruler one end is fixed on the midleg; The other end is inserted in the fixator that is enclosed within the pen outside and extends to the outside, and described fixator is provided with a fastening bolt.

2. a kind of simple and easy compasses according to claim 1 is characterized in that, described pen is slidingly connected with ruler under the drive of fixator.