CN201099099Y - Simple combination common ruler for students - Google Patents

Abstract

The utility model discloses a combined ruler for students, which comprises a straight ruler (1). The utility model is characterized in that a semicircular tube (2) is fixed at the rear edge of the straight ruler (1), a rolling shaft (3) is provided inside the semicircular tube (2), a scale (4) is provided on the rolling shaft (3), an observation window (5) is provided on the upper wall of the semicircular tube (2) in a way that the scale (4) is positioned in the middle position of the observation window (5), a radian gauge (6) is arranged on the straight ruler (1), and through holes (7) of different geometric shapes are provided at two sides of the radian gauge (6) on the straight ruler (1). The combined ruler integrates the functions of drawing straight lines and parallel lines, measuring distance between parallel lines and measuring camber angles, has simple structure and convenience for use and carrying, and is helpful for students to draw geometric shapes.

Description

Simple combination student uses chi always

Technical field

The utility model relates to the improvement of a kind of student chi tool commonly used, specifically a kind ofly integrates picture straight line, amount arc chord angle, draws parallel lines, simple combination student's chi commonly used of lining line distance.

Background technology

At present, in the student draws, as draw straight line, parallel lines and all use ruler, need when drawing parallel lines to measure the parallel lines distance with ruler, need when measuring arc chord angle with compasses or radian plate, its weak point is: when the student charts, various chi tools all need be with, because the single existence of various chi tools is more scattered, so, carry and use equal inconvenience.

Summary of the invention

The purpose of this utility model is to provide a kind of and is easy to carry, easy to use, integrate the picture straight line, draw parallel lines, measure the parallel lines distance, simple combination student's chi commonly used of amount arc chord angle.

For reaching above purpose, the technical scheme that the utility model adopted is: this simple combination student uses chi always, constitute by ruler, it is characterized in that on the back edge of ruler, fixing first pipe, in the semicircle pipe, establish the axis of rolling, on the axis of rolling, establish rule, on the upper wall of semicircle pipe, establish observation window, rule is in the medium position of observation window, on ruler, establish the radian chi, measuring radian by the radian chi, establish the through hole of different geometries on the ruler of radian chi both sides, is the right angled triangle of 30 degree as circle, ellipse, isosceles triangle, an acute angle.The utility model is also implemented by following measure: described ruler and semicircle Guan Junyong transparent plastic are made.

The beneficial effects of the utility model are: compare with the chi tool commonly used that present student uses, can integrate picture straight line, parallel lines, measurement parallel lines apart from, measure arc chord angle, simple in structure, use and carry all more conveniently, be beneficial to the student and draw.

Description of drawings

Fig. 1 is the utility model structure schematic top plan view.

Fig. 2 analyses and observe enlarged diagram for the utility model along A-A.

The specific embodiment

Make the utility model with reference to accompanying drawing 1,2.This simple combination student uses chi always, constitute by ruler 1, it is characterized in that on the back edge of ruler 1, fixing first pipe 2, in semicircle pipe 2, establish the axis of rolling 3, on the axis of rolling 3, establish rule 4, on the upper wall of semicircle pipe 2, establish observation window 5, rule 4 is in the medium position of observation window 5, on ruler 1, establish radian chi 6, measure radian, on the ruler 1 of radian chi 6 both sides, establish the through hole 7 of different geometries by radian chi 6; Described ruler 1 and semicircle pipe 2 are all made of transparent plastic.

Claims (1)

1, a kind of simple combination student chi commonly used, constitute by ruler (1), it is characterized in that on the back edge of ruler (1), fixing first pipe (2), in semicircle pipe (2), establish the axis of rolling (3), establish rule (4) on the axis of rolling (3), establish observation window (5) on the upper wall of semicircle pipe (2), rule (4) is in the medium position of observation window (5), on ruler (1), establish radian chi (6), on the ruler (1) of radian chi (6) both sides, establish the through hole (7) of different geometries.

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