Adjustable solid geometry three-view demonstration device for teaching

Abstract

The invention discloses an adjustable three-view demonstration device for three-dimensional geometry for teaching, which comprises a bottom fixed plate, a turntable is rotatably connected to the top center of the bottom fixed plate through a rotating connection shaft, and the surface of the turntable is embedded and connected with a groove. As for the suction cup, the center of the frame on both sides of the bottom fixing plate is respectively embedded with a first fixing rod and a second fixing rod through a rectangular through hole, and the top ends of the first fixing rod and the second fixing rod are respectively screw connected with a first projection The telescopic bracket for the lamp and the telescopic bracket for the second projection lamp, the first projection board and the second projection board are welded on the two side frames of the bottom fixing plate corresponding to the first fixing rod and the second fixing rod, and the first projection board And the inner shell of the second projection board is sprayed with a grid ruler. In the present invention, firstly, by providing a turntable, the model can be rotated through the turntable when performing demonstration experiments, so that the demonstration can be more comprehensive when performing demonstration teaching.

Description

technical field [0001] The invention relates to the technical field of teaching demonstration teaching aids, in particular to an adjustable three-view demonstration device of three-dimensional geometry for teaching. Background technique [0002] Orthographic engineering drawings that can correctly reflect the length, width and height of the object (front view, top view, left view Figure 3 A basic view) is a three-view, which is a conventional abstract expression of the geometric shape of an object in the engineering world. Three-view is a figure drawn by an observer observing the same spatial geometry from three different angles: above, left, and front. The person's line of sight is defined as a parallel projection line, and then looking directly at the object, the figure drawn by the orthographic projection method of the outline of the object seen is called a view. An object has six views: the view projected from the front of the object to the back is called the main view ...

AI Technical Summary

Problems solved by technology

[0003] The three-dimensional geometry three-view demonstration device for high school mathematics teaching is a three-dimensional geometry three-view demonstration device. The traditional three-dimensional geometry three-view demonstration device for high school mathematics teaching has a relatively simple structure, and the demonstration is not comprehensive enough, and the formed views are not standardized enough.

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