CN2797073Y - Multifunction compasses - Google Patents

Abstract

The utility model relates to a pair of multifunctional compasses, which relates to a pair of multifunctional teaching compasses which can be used for drawing various plane geometry figures of circles, rectangular coordinates, angles, etc., and belongs to a teaching appliance. The utility model is composed of two compass legs, a chalk clamp, compass points, a hinging column, etc., and is characterized in that the front and the back side surfaces of the two compass legs are respectively and exactly marked with scale numbers of lengths, wherein the side surface of a compass leg is also exactly marked with scale numbers of angles. The utility model overcomes a defect than the existing teaching compasses can only be used for drawing the circles. The multifunctional compasses can be used for drawing the circles, the angles, the rectangular coordinates, other plane geometry figures, etc., and are convenient for teachers to carry and use.

Description

A kind of multifunctional compass

(1) technical field

The utility model relates to a kind of multifunctional teaching compasses of drawing multiple plane geometric figures such as circle, rectangular co-ordinate, angle, belongs to teaching aid.

(2) background technology

Existing educational compasses is function singleness mostly, can only satisfy the requirement of picture circle, also will be as need picture angle, rectangular co-ordinate and other plane geometric figure etc. by means of drawing instruments such as protractor, ruler, set squares, this has brought inconvenience with regard to the teaching of giving the teacher.

(3) summary of the invention

The purpose of this utility model is to provide a kind of can not only directly draw circle, and can also the double as ruler etc. directly draws the multifunctional teaching compasses of angle, rectangular co-ordinate and other plane geometric figures, thereby brings convenience for teacher's teaching.

For achieving the above object, the utility model adopts following technical scheme: a kind of multifunctional compass, it is by two compass legs (1), chalk folder (2), compasses point (3), hinge joint post formations such as (4), hinge joint post (4) at one end links two compass legs (1) together, article two, the other end of compass leg (1) is fixedly connected with chalk folder (2) and compasses point (3) respectively, the positive and negative two sides that it is characterized in that two compass legs (1) respectively accurately mark the length number of division is arranged, wherein the side of a compass leg (1) also accurately mark the angle index number is arranged.

The utlity model has simple in structure, easy to use, advantage such as function is more, and it is extensive to make material, implements easily, only needs accurately to mark high scale on the two legs of existing compasses and gets final product, the cost of manufacture increase is a kind of simple and practical educational compasses seldom.

(4) description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model

Among the figure: 1-compass leg 2-chalk folder 3-compasses point

4-links post

(5) specific embodiment

Below in conjunction with accompanying drawing the utility model is done further detailed description: select for use high-quality timber to make the compass leg of two long 50CM, engrave the length number of division at the two sides of two compass legs subscript respectively again, a compass leg subscript engraves the angle index number therein, then at one end two compass leg hinge joints together with the hinge joint post, at last chalk folder and compasses point are fixedly connected on the other end of two compass legs respectively, can obtain the described a kind of multifunctional compass of utility model.

Claims (1)

1, a kind of multifunctional compass, it is by two compass legs (1), chalk folder (2), compasses point (3), hinge joint post formations such as (4), hinge joint post (4) at one end links two compass legs (1) together, article two, the other end of compass leg (1) is fixedly connected with chalk folder (2) and compasses point (3) respectively, the positive and negative two sides that it is characterized in that two compass legs (1) respectively accurately mark the length number of division is arranged, wherein the side of a compass leg (1) also accurately mark the angle index number is arranged.