Aluminum nickel alloy mobile teaching triangular ruler with slope track grooves, through holes and corners

Abstract

The invention relates to a triangular ruler special for teaching, in particular to an aluminum nickel alloy mobile teaching triangular ruler with slope track grooves, through holes and corners. As an improvement, a slippage through hole is formed in the lower plane of each sliding plate, and a side ruler step hole is formed in the upper plane of each side ruler; a slope protruding track is arranged on the lower plane of each sliding plate, and a slope groove is formed in the upper plane of each side ruler; a corner sight hole is formed in the lower plane of each sliding plate, and corner scales are arranged on the upper plane of each side ruler; a scale slope is arranged on the inner side of the upper plane of each side ruler, and length scales are further engraved on each scale slope; a step hole plane is arranged on the step hole of each side ruler, each step screw is provided with a screw big end and a screw cylinder section, a screw step face is arranged at the connecting portion of each screw big end and the corresponding screw cylinder section, and each belleville spring is provided with a belleville spring outer ring and a belleville spring spoke; the belleville spring outer ring is fixed to the position of the included angle between the step hole of each side ruler and the corresponding step hole plane, and each screw step face is supported by the corresponding belleville spring spoke; and each step screw sequentially penetrates a rotation through hole and the step hole of the corresponding side ruler, and a belleville nut is matched with the outer threaded end of each step 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, an...

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

Images