JPH09142084A - Straightedge with triangular rule and protractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a rule three functions, facilitate the safekeeping and handling thereof, and remove danger by having no sharp parts of the triangular rule by furnishing an isosceles triangle, an inequilateral triangle on the straightedge and protractor, and allowing it to have functions of a triangular rule and protractor in common use. SOLUTION: The straight line rule part 2 is made by marking scales on one side of a rule main body 1. The central part of the rule main body 1 is punched out for forming an isosceles triangle 3, and inequilateral triangle 4, and a protractor. Scales 7 are marked on the inner periphery of the protractor. When used, a length is measured by the use of the straight line scales 6, and a straight line is drawn. Also, in use of the scales 7 on the inner periphery of the protractor, an angle is measured to sense the direction, in the triangle, by tracing the cut out inside, an isosceles triangle (45 deg., 90 deg., 45 deg.) and inequilateral triangle (30 deg., 90 deg., 60 deg.) can be drawn. Thereofore, one rule has three functions, and the safekeeping or handling thereof is facilitated, and further any danger can be eliminated having no sharp parts of the triangle rule.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a learning tool.

[0002]

2. Description of the Related Art Conventionally, an isosceles triangle, an isosceles triangle, and a protractor have been provided separately.

[0003]

[Problems to be solved by the invention]

B. Four rules, including a straight ruler, were required for learning arithmetic. B, the storage of the four rulers was troublesome and easy to lose. C, there was a danger of piercing the body with the sharp edge of the triangle ruler. D. I had to use four rulers depending on the purpose of use.

[0004]

[Means for Solving the Problems] The functions of a triangle ruler and a protractor are added by die-cutting an isosceles triangle (3), an isosceles triangle (4), and a protractor (5) in the central portion of a ruler body (1). It is a straight ruler.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, since one ruler has the functions of a straight line ruler, a triangle ruler, and a protractor, the straight line ruler (2) is used to measure the length of the straight line and draw the straight line. Also,
It is possible to draw each triangle by an isosceles triangle (3) and an isosceles triangle (4), measure the angle using a protractor (5), and know the direction.

[0006]

Embodiments of the present invention will be described below. A. A scale (6) is provided on one side of the ruler body (1). (B) At the center of the ruler body (1), the isosceles triangle (3), the isosceles triangle (4), and the protractor (5) are die-cut. Had a scale (7) on the inner circumference of the protractor. The present invention has the above configuration. When using the present invention, a straight line can be drawn by measuring the length using a linear scale (6). Moreover, the angle can be measured and the direction can be known by the scale (7) on the inner circumference of the protractor (5). Triangles can be drawn as isosceles triangles (45 °, 90 °, 45 °) and isosceles triangles (30 °, 90 °, 60 °) by tracing the inside of the die-cut, and drawn as necessary. You can cut out a triangle to make a triangle ruler.

[0007]

【The invention's effect】

B. One ruler is convenient because it has three functions. B. Since the four rulers are integrated into one, it is easy to store and handle. Had an appropriate size and there is little risk of loss. D, Since there is no triangular sharp point, there is no danger. E, it is easy to draw a triangle, and if you cut through the drawn triangle, it will become a triangle ruler. F The protractor is an internal scale, making it easy to measure the angle.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view of the present invention.

[Explanation of symbols]

 1 Ruler main body 2 Straight line ruler part 3 Isosceles triangle part 4 Isosceles triangle part 5 Protractor part 6 Straight scale 7 Protractor scale

Claims (1)

[Claims] 1. A straight ruler having an isosceles triangle (3), an isosceles triangle (4) and a protractor (5) on a ruler and having the functions of the triangle ruler and the protractor.