Special plotter for advanced mathematics

Abstract

The invention discloses a special plotter for advanced mathematics. The special plotter comprises an annular support plate, a first plotting board, a second plotting board, a second rotating shaft, a gear, a first chalk sleeve and a rotating handle, wherein a through groove is formed in the circumferential wall of the annular support plate, and the top surface of the annular support plate is provided with first scale lines; one end of the first plotting board is fixed to the inner wall of the annular support plate, the other end of the first plotting board is located at the circle center of the annular support plate, and a first rotating shaft is arranged at the top of the first plotting board located at the circle center in the longitudinal direction; one end of the second plotting board sleeves the first rotating shaft, and the other end of the second plotting board is located in the through groove; the second rotating shaft is detachably connected with the top of the first rotating shaft in the longitudinal direction; the first gear is in key connection with the second rotating shaft, the top of the second rotating shaft located above the first gear is connected with a horizontal connecting plate, and the length of the horizontal connecting plate is greater than the radius of the annular support plate; the first chalk sleeve is arranged on the bottom wall of the horizontal connecting plate outside the outer edge of the annular support plate; and the rotating handle is connected to the second rotating shaft in the longitudinal direction. According to the special plotter, various plotting functions can be achieved, and the area of a teaching desk cannot be occupied.

Description

technical field [0001] The invention relates to the field of mathematics teaching tools, in particular to a special plotter for advanced mathematics. Background technique [0002] Mathematics is a very important basic subject of natural science. In order to teach intuitively, the drawing of mathematical geometric figures will be involved in the teaching of geometry. However, compasses, protractors, straightedges and triangular rulers are usually used when drawing geometric figures. Therefore, Mathematics teachers must carry compass, protractor, ruler and triangular drawing tools in class, but because traditional drawing tools exist independently, they are not easy to carry and will occupy the area of ​​the teaching desk. Contents of the invention [0003] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and provide a special plotter for advanced mathematics, which can realize multiple plotting functions without occupying the...

AI Technical Summary

Problems solved by technology

[0002] Mathematics is a very important basic subject of natural science. In order to teach intuitively, the drawing of mathematical geometric figures will be involved in the teaching of geometry. However, compasses, protractors, straightedges and triangular rulers are usually used when drawing geometric figures. Therefore, Mathematics teachers must carry compass, protractor, ruler and triangular drawing tools in class, but because traditional drawing tools exist independently, they are not easy to carry and will occupy the area of ​​the teaching desk

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