Curve plotter for trigonometric functions

Abstract

The invention relates to a plotter, in particular to a curve plotter for trigonometric functions. The curve plotter comprises a bottom plate, a movable plate, a fixed plate and a turntable, and is characterized in that a paper guide groove is arranged on the bottom plate, a track is mounted on the bottom plate, the movable plate capable of moving vertically along the track is arranged on the track, and a pen rack is mounted at the right end of the movable plate; and the fixed plate is mounted on the bottom plate and is positioned above the movable plate, the rotatable turntable is mounted on the fixed plate, five concentric circles are arranged on the upper portion of the turntable and are positioned above the fixed plate, four line slots are formed among the five concentric circles, a small hole is arranged on the turntable, a circular plate is arranged on the lower portion of the turntable and is positioned below the fixed plate, a gear is mounted in the circle center of the turntable, a rack is mounted on the lower portion of the turntable and is meshed with the gear, and a hinge pin on the rack can drive the movable plate to move vertically along with rotation of the turntable. The curve plotter has the advantages that sine curve graphs and cosine curve graphs can be drawn by the curve plotter; curve graphs with different periods can be drawn by the curve plotter, and amplitudes of the curve graphs can be optionally adjusted; and the plotter can be used on a blackboard.

Description

technical field [0001] The invention relates to a plotter, in particular to a trigonometric function curve plotter. Background technique [0002] At present, when teachers teach students about sinusoidal curves, they need to draw sinusoidal curves by hand. Some people draw better and some people draw poorly. Moreover, drawing by hand is labor-intensive and time-consuming, wasting time in class. Currently there is no simple instrument for drawing sinusoids that can be demonstrated in the classroom. Contents of the invention [0003] The purpose of the present invention is to provide a simple trigonometric function curve plotter that can be demonstrated in classrooms. [0004] The invention consists of a base plate, a movable plate, a fixed plate and a turntable. There is a paper guide groove on the base plate, a track is installed on the base plate, and a movable plate that can move up and down along the track is installed on the track. There is a long groove on the movab...

AI Technical Summary

Problems solved by technology

[0002] At present, when teachers give students lessons, they need to draw sinusoidal curves by hand. Some people draw better, and some people draw poorly.

Moreover, drawing by hand is labor-intensive and time-consuming, wasting time in class

There is no simple instrument for drawing sinusoids that can be demonstrated in the classroom

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