Slope track groove through hole corner aluminum-nickel alloy activity teaching triangle ruler

Abstract

The invention relates to a special triangle ruler for teaching, which is an aluminum-nickel alloy movable teaching triangle ruler with inclined rail groove through holes. There are inclined convex rails on the lower plane, and inclined grooves on the upper plane of the side ruler; there are corner viewing holes on the lower plane of the slide plate, and corner scales on the upper plane of the side ruler; there is a scale slope on the inner side of the upper plane of the side ruler, and engraved on the scale slope The length scale; there is a step hole plane on the step hole of the edge ruler, a screw big end and a screw cylindrical section on the step screw, the connecting part of the screw big end and the screw cylindrical section is the screw step surface, and the butterfly spring has a butterfly spring outer ring and a screw cylinder. The butterfly spring spokes, the outer ring of the butterfly spring is fixed at the angle between the step hole of the side ruler and the plane of the step hole. The nut cooperates with the externally threaded end of the stepped screw.

Description

technical field [0001] The invention relates to a special triangle ruler for teaching, which is classified as B43L by the international patent, in particular to an aluminum-nickel alloy movable teaching triangle ruler with angled rail groove through hole corners. Background technique [0002] Mathematics is one of the important subjects. In junior high school mathematics, trigonometry is the most important. Learning trigonometry well is the most important basis for plane geometry in junior high school and solid geometry in high school. [0003] At present, in teaching, there are rulers, triangular rulers, etc. for teaching geometry. They have many disadvantages: they are inconvenient to carry, inconvenient to use, and more importantly, they have single functions. When teaching drawing, users can only draw the graphics they need step by step on the basis of online. The drawing process is cumbersome and not intuitive, and it cannot better cultivate students' association, anal...

AI Technical Summary

Problems solved by technology

[0003] At present, in teaching, there are rulers, triangular rulers, etc. in teaching geometry. They have many disadvantages: they are inconvenient to carry, inconvenient to use, and more importantly, they have a single function.

When teaching drawing, users can only draw the graphics they need step by step on the basis of online. The drawing process is cumbersome and not intuitive, and it cannot better cultivate students' association, analogy, observation and hands-on ability. It is very busy to draw and speak, which adds great difficulty to the educators

Chinese patent: adjustable triangular ruler (patent number: 2011200369592), but it is impossible to ensure that the three rods are on the same plane, and there is a large error. Another Chinese patent: adjustable multi-purpose four-pole ruler (patent number: 2013201682530), is also It is impossible to make the four rulers on the same plane, and there is still a large error; there is also a Chinese patent: multi-functional teaching ruler (patent number: 2014208739549), it is still impossible to make all the rulers on the same plane, there are relatively large big error

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