Aluminum-molybdenum alloy round groove corner pointer adjustment teaching triangle board

Abstract

The invention relates to a special triangle plate for teaching, an aluminum-molybdenum alloy circular groove corner pointer adjustment teaching triangle plate, which is characterized in that: there are hole plane straps on the step holes of the side ruler, there are screw big ends and screw cylindrical sections on the step screws, screw There is a screw flat strap on the inner plane of the big end, one end of the cylindrical spring is fixed on the screw flat strap, and the other end of the cylindrical spring is fixed on the hole flat strap; the step screw passes through the rotary through hole and the side ruler step hole in turn, and the wing nut Cooperate with the external threaded end of the step screw, and rotatably overlap the lower plane of the slide plate on the upper plane of the side ruler. The step screw, the rotation through hole and the step hole of the side ruler are all clearance fits; one end of the cylindrical spring is fixed on the screw plane lap The other end of the cylindrical spring is fixed on the hole plane, and the spokes of the butterfly spring support the step surface of the screw; combined with the adjustment of the wing nut, it ensures that the upper plane of the side ruler in each movable plate and the lower plane of its own slide plate The space is rotatable with frictional resistance.

Description

technical field [0001] The invention relates to a special triangle plate for teaching, and the international patent classification is B43L, in particular to an aluminum-molybdenum alloy circular groove corner pointer adjustment teaching triangle plate. 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, analogy, observ...

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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