Plate spring scale compass

Abstract

To finally devise a ruler which, after many attempts to improve upon the inconveniences, poor usability, and dangers of the needles attached to conventional educational compasses, allows anyone, even lower-grade students, to draw round circles easily, safely, and neatly without the need for a conventional compass, using only a line-drawing ruler which fits easily into a pencil case, has no case, and is compact enough to be carried inside a pencil case, and which is a revolutionary and ultimate planar scale compass added to the world-class stationery that Japan can be proud of, and by connecting the compasses together, enables drawing of large round circles.SOLUTION: Provided is a ruler compass that utilizes the bending and rounding portions of a leaf spring. The tip of the leaf spring is formed to be rounded so that the leaf spring can be inserted from below. The ruler has graduations of 0 to 15 cm or 20 cm, and 1 mm and 1 cm printed on one side.SELECTED DRAWING: None

Description

[Technical Field]

[0001] Of course, you can use a ruler to draw lines, but it is also the first in the world to be able to draw circles with a ruler, adding another item to the Japanese stationery that Japan is proud of around the world. [Background technology]

[0002] With this single ruler, anyone, even elementary school students, can easily draw a round circle. One stationery item used solely for drawing a round circle that shows no signs of improvement is the forked compass, used by children from elementary school to adulthood. Aside from compasses for precision drawings and nautical charts, it's difficult for anyone to use when simply drawing a round circle. This problem has been solved with the introduction of a single ruler, replacing the conventional compass. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0003] It is a ruler made from thin leaf springs, 1cm or 1.5cm wide, with lengths ranging from 0 to 15cm and 20cm, marked with 0mm and 1cm. The leaf springs can be bent into a circle, so you can draw circles by tracing the inside with a pencil or ballpoint pen. [Means for solving the problem]

[0004] With its thin spring plate, it is the ultimate scale compass that can be easily carried anywhere, in a pencil case, file folder, or breast pocket. [Effects of the Invention]

[0005] Everyone, especially the younger students, were pleased with this product. Conventional compasses are difficult to write with and tend to slip off the writing pad, making it difficult to write with. However, with this Itahasjo scale compass, you can simply insert a circle of the size you want from the bottom and trace the inside with a pencil to draw a beautiful circle, which has been well received. BEST MODE FOR CARRYING OUT THE INVENTION

[0006] Conventional compasses have not shown any signs of improvement for decades or even centuries to come, but we are not criticizing compasses for drafting or nautical charts. Rather, they were developed for educational and arts purposes, with the sole aim of being able to draw circles quickly, neatly, and easily, using just a ruler. [Example]

[0007] Now that we know that a single line drawing ruler can replace a compass, we want to make it a better product that is safe and reliable so that even younger students can use it to study circles and pie charts quickly. [Industrial Applicability]

[0008] This scale compass will be useful in a wide range of industries, including education and stationery, and will be a replacement for conventional compasses in the future. [Brief explanation of the drawings]

[0009] [Figure 1] Name of drawing A is the front view of the plate spring scale compass B is the side view of the plate spring scale compass C is the top view of the plate spring scale compass D is the side view of the plate spring scale compass inserted for rolling E is the diagram for folding the dotted line F is the back view of the plate spring scale compass (A) Plate spring scale compass (B) Insertion port (notch) (C) Printing (D) Dotted line

Claims

1. This is a ruler compass that uses the bending and rounding properties of a leaf spring.

2. The tip of the plate spring is rounded so that it can be inserted from below.

3. It is a ruler with measurements from 0 to 15cm-20cm, 1mm, and 1cm printed on one side.

Images