CN202448586U

CN202448586U - Triangle with circle drawing function

Info

Publication number: CN202448586U
Application number: CN2012200337384U
Authority: CN
Inventors: 张岩
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-03
Filing date: 2012-02-03
Publication date: 2012-09-26
Anticipated expiration: 2022-02-03

Abstract

The utility model discloses a triangle with a circle drawing function, belongs to stationery, and particularly relates to a triangle for middle school students. The triangle with the circle drawing function comprises a triangle body with length scale marks at three edges, and is characterized in that a circular hole for drawing a circle every 0.5 cm is formed on the length scale mark on one right-angle edge of the triangle body. The triangle with the circle drawing function has the beneficial effects that a small circular hole for a pencil refill to pass through is formed on a centimeter scale of one right-angle edge of the triangle; and one pen is inserted into one circular hole as an original point and the other pen refill is inserted into the other circular hole to rotate, so that a needed circle can be conveniently drawn out.

Description

A kind of set square that has picture circle function

Technical field

The utility model belongs to a kind of stationery, particularly the set square of middle school student's use.

Background technology

Various set squares, compasses are the indispensable stationeries of middle school student; Sometimes the classmate who has leaves behind set square or compasses; Make troubles for classmates' study, particularly take an examination mathematics often regular meeting run into the exercise question of picture circle, leave behind compasses if only be with set square; Can not draw circle and come, influence total marks of the examination.

The utility model content

Do not draw the deficiency of round function in order to overcome existing set square, the purpose of the utility model provides a kind of set square that has picture circle function, can draw the easily circle of different-diameter of this utility model.

The technical scheme that its technical problem of the utility model solution is taked is: a kind of set square that has picture circle function; Comprise that all there is the set square body of length graduation mark on three limits, is characterized in that: every on the length graduation mark of a right-angle side of set square body have one to draw the circular hole of circle usefulness at a distance from 0.5cm.

The beneficial effect of the utility model is owing on the centimeter scale of a right-angle side of set square, be provided with the tiny circular hole that can pass pencil-lead; It is initial point that a penholder is gone into a circular hole; The another pencil-lead inserts in the other circular hole and rotates, the circle that can draw easily and need.

Description of drawings

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

Among the figure, 1. set square body, 2. circular hole, 3. length graduation mark.

The specific embodiment

The specific embodiment of the utility model is, and is as shown in the figure:

Embodiment 1, and a kind of set square that has picture circle function comprises that all there is the set square body 1 of length graduation mark 3 on three limits, is characterized in that: every on the length graduation mark of a right-angle side of set square body have one to draw the circular hole 2 of circle usefulness at a distance from 0.5cm.

Claims

1. a set square that has picture circle function comprises that all there is the set square body of length graduation mark on three limits, is characterized in that: every circular hole that a picture circle usefulness is arranged at a distance from 0.5cm on the length graduation mark of a right-angle side of set square body.