Teaching demonstration training tool for accurately drawing curve

Abstract

The invention relates to a teaching demonstration training tool for accurately drawing a curve. The training tool comprises two first support rods and two second support rods, wherein the first support rods and the second support rods are connected and fixed through connecting rods, a cross rod is horizontally fixed between the two connecting rods, a teaching board is arranged at the upper ends ofthe first support rods, and a plurality of vertical through slots are horizontally formed in the teaching board. The cross rod is sleeved with a first gear rotationally connected with the cross rod,two second gears are arranged at the bottom end of the first gear and are respectively and rotationally connected with a threaded rod, the other end of the threaded rod penetrates through a positioning cross rod to be fixedly connected with a limiting block, the first support rods and the second support rods are sleeved with two ends of the positioning cross rods, extension springs are fixedly arranged between the positioning cross rod and the connecting rod, and the first support rods and the second support rods are respectively sleeved with the two extension springs, so that the second gearsare operated conveniently, the fixing block can be adjusted, and the curve can be drawn rapidly and conveniently.

Description

technical field [0001] The invention relates to the field of mathematics, in particular to a teaching and demonstration teaching aid for accurately drawing curves. Background technique [0002] There are many kinds of mathematical curves, such as circle, ellipse, hyperbolic parabola, Archimedes spiral curve, four-leaf clover curve, trigonometric function curve, exponential curve, vine leaf line, heart line cycloid (outer cycloid, inner pendulum) line), catenary and circular involute, etc. [0003] Drawing mathematical curves in mathematics teaching is an important teaching method in the teaching process. Usually, teachers use chalk on the blackboard for graphics drawing teaching. Chalk drawing often has situations that students in the back row cannot see clearly. At the same time, it is necessary to change the graphics. It is not only cumbersome and time-consuming to erase the parts that need to be changed, but also very inconvenient to operate. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of teaching demonstration teaching aid of accurate drawing curve, to solve the above-mentioned background technology proposed in the learning teaching, drawing a mathematical curve figure is an important teaching method in the teaching process, usually all is that the teacher uses chalk on the blackboard In graphics drawing teaching, students in the back row often cannot see clearly when drawing with chalk. At the same time, when changing graphics, you need to erase the place that needs to be changed and then redraw it. Not only is it cumbersome and time-consuming, but it is also very inconvenient to operate.

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