Folding multifunctional ruler

Abstract

The invention relates to a folding multifunctional ruler for students. The ruler comprises a main ruler, a rotary auxiliary ruler, a vernier auxiliary ruler and a compass handle, wherein the rotary auxiliary ruler is of a cylindrical structure with steps, the uppermost end of the rotary auxiliary ruler is provided with external threads, a base is inclined, a convex buckle is arranged on the upperface of the base, angle scale marks are arranged on the lower surface of the base, a main-ruler body is provided with length scale marks, one end of the main-ruler body is circular, the center of thecircle is provided with a conical hole, angle scale marks are arranged on the lower surface of the main-ruler body, a steel needle containing hole is formed in the other end of the main-ruler body, length scale marks are arranged on a ruler body of the rotary auxiliary ruler, one end of the ruler body is a circle with a hole in the center, a concave buckle is arranged on the inner side of the circle, a pencil lead containing hole is formed in the other end of the ruler body, and one end of the compass handle is provided with a circle with internal threads. The folding multifunctional ruler isnovel in design and easy and convenient to fold, a large length measuring range and high angle measuring precision can be achieved with a small size, students can be familiar with measuring principlesof the vernier caliper during use, functions of rulers, protractors, set squares and compasses can be realized, the ruler is convenient to carry, and drawing efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of stationery and relates to a folding multifunctional ruler. Background technique [0002] Nowadays, stationery for students generally needs to be equipped with rulers, set squares, protractors, compasses, etc. There are many types and specifications, the size is large, and it is inconvenient to carry. Moreover, there is no stationery for students that involves the measurement principle of vernier calipers. Students will not be able to effectively learn vernier calipers later. I understand that the existing multi-functional rulers on the market simply integrate two to three functions into one ruler. There is no measurement method involving the principle of vernier calipers, and the size is still large, which is inconvenient to carry. Students’ recognition is low. Generally, drawing Still will carry multiple tools, for this reason the present invention has designed a kind of folding multifunctional ruler, so...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, stationery for students generally needs to be equipped with rulers, set squares, protractors, compasses, etc. There are many types and specifications, the size is large, and it is inconvenient to carry. Moreover, there is no stationery for students that involves the measurement principle of vernier calipers. Students will not be able to effectively learn vernier calipers later. I understand that the existing multi-functional rulers on the market simply integrate two to three functions into one ruler. There is no measurement method involving the principle of vernier calipers, and the size is still large, which is inconvenient to carry. Students’ recognition is low. Generally, drawing It is still necessary to carry a variety of tools, so the present invention designs a folding multifunctional ruler to solve the above problems

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