Spiral math teaching demonstrator

Abstract

The invention discloses a helix type mathematics teaching demonstration device and relates to mathematics teaching demonstration devices. A slide way which is longitudinally arranged is located in the center of the upper surface of a base; a protruding edge is arranged at the bottom side of a transverse movement plate, and the lower portion of the protruding edge is connected with a rack which is arranged below the base; the bottom edge of a triangular support is fixedly connected with the strip-shaped surface at the back side of the base, and the vertical edge of the triangular support props up the back side of the transverse movement plate; two or more helix lead angle guide slide ways which are different in inclination angle are arranged on the transverse movement plate, and a drawing pen is matched with a certain helix lead angle guide slide way; a slide block located at the position, behind the drawing pen, of the base is in sliding fit with a vertical sliding groove formed in the vertical edge of the triangular support; a gear is installed below a round structure at the front side of the base, and the gear is meshed with the rack; the upper end of a revolving shaft of the gear is connected with a prism on the surface of the base, and a hole matched with the prism is formed in the center of the bottom of a conical model; a telescopic rod is arranged on the front portion of the drawing pen. By means of the device, the problems that helix graphs on the conical surface are not standard at all, and the teaching effect is still not satisfying are solved.

Description

technical field [0001] The invention relates to a mathematics teaching demonstration device, in particular to a device for drawing a spiral on a conical surface. Background technique [0002] Demonstration method is a commonly used teaching method in physics, chemistry and other subjects. For mathematics teaching, it is used less and is generally not taken seriously. However, with the deepening of the new curriculum reform, teachers feel more and more that the demonstration method is very important. In many mathematics teaching, it can achieve twice the result with half the effort. Demonstration methods are intuitive, they can enable students to gain perceptual knowledge through observation, enrich direct experience, and lay a good foundation for learning new knowledge and forming new concepts. For example, when teaching the interior angles and theorem of a triangle, the teacher can cut a triangle with cardboard by himself, and then put the three angles together. Through s...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a spiral mathematics teaching demonstrator. The invention solves the problem that the helical line graph on the surface of the cone is not standard, and the existing models, pictures, etc. are fixed and cannot demonstrate the drawing process, and audio-visual materials cannot allow students to participate in the drawing process. The teaching effect is still very unsatisfactory

Images