Teaching plotting instrument

Abstract

The invention discloses a teaching plotting instrument, which comprises a ruler body and a rotating guide ruler, wherein one end of the ruler body is provided with an angulometer; the other end of the ruler body is provided with an adjustment suction block and an erasure body; the upper side and the lower side of the ruler body are respectively provided with a first scale plate and a second scale plate; a gradienter is arranged above the angulometer; the gradienter comprises a level bubble and a middle position scale; a straight chute is formed below the ruler body; a clamping head is arranged in the straight chute; the exterior, near one end of the straight chute, is provided with a center fixed head; the center of the angulometer is provided with a pivot pin; one end of the pivot pin is provided with a sucker; the rotating guide ruler is connected with the ruler body through the pivot pin. The teaching plotting instrument disclosed by the invention has the advantages that the structure is simple and reasonable; the use is convenient; functions are complete; the efficiency and the accuracy of plotting can be greatly improved.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a teaching plotter. Background technique [0002] At present, in classroom teaching, teachers are still drawing various figures on the blackboard with set squares, rulers and compasses. Depending on the type of the square, it is easy for the draftsman to draw straight lines with special angles, such as two straight lines at 30°, two straight lines at 45°, and two straight lines at 60°, but for two straight lines at general angles, only use a square Drawing is difficult, if not impossible. When using a settable or ruler to draw a horizontal line, teachers often rely on previous drawing experience to operate, resulting in inaccurate graphics drawing, especially some young teachers lack drawing experience or lack of drawing experience, which makes it more difficult to draw horizontal lines, thus Affect the quality and progress of classroom teaching. Contents of the invention [0003] The purp...

AI Technical Summary

Problems solved by technology

Depending on the type of the square, it is easy for the draftsman to draw straight lines with special angles, such as two straight lines at 30°, two straight lines at 45°, and two straight lines at 60°, but for two straight lines at general angles, only use a square It is difficult or even impossible to draw

When using a settable or ruler to draw a horizontal line, teachers often rely on previous drawing experience to operate, resulting in inaccurate graphics drawing, especially some young teachers lack drawing experience or lack of drawing experience, which makes it more difficult to draw horizontal lines, thus Affect the quality and progress of classroom teaching

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