Multifunctional speed relationship demonstrator

Abstract

The invention discloses a multifunctional speed relationship demonstrator, which comprises a drawing board, drawing paper, a screw rod assembly, a vertical guide rail, a line connecting piece, a mounting seat and a painting brush, the drawing board is vertically arranged; the drawing paper is placed on the vertical surface of one side of the drawing board; the screw rod assembly for guiding to beparallel to the horizontal direction of the drawing surface of the drawing paper is fixed at the bottom of one side of the drawing board provided with the drawing paper; and the vertical guide rail ismovably installed on the lead screw assembly. The vertical guide rail is driven by the screw rod assembly to move along the guide of the screw rod assembly; the mounting base is mounted on one side,facing the drawing paper, of the vertical guide rail in a sliding manner; the mounting base moves in the height direction of the vertical guide rail; a paintbrush facing the drawing paper is fixed inthe mounting base; the beneficial effects of the multifunctional speed relationship demonstrator are that the demonstrator facilitates the teaching demonstration, improves the teaching interestingness, enables students to visually feel the practical expression of knowledge, cultivates the inference capability of students, stimulates the learning interest of students, is simple in overall structure, is easy to manufacture, and is stable in movement of the installation seat.

Description

technical field [0001] The invention relates to the technical field of teaching demonstration, in particular to a multifunctional speed relationship demonstrator. Background technique [0002] When showing the demonstration experiment of "the movement of the wax block", the experiment is not only inconvenient to operate, but also the visibility is not strong when observing the trajectory, which cannot give students an intuitive and specific feeling, and the ideal teaching effect cannot be achieved. Moreover, in the demonstration device provided in the existing teaching materials, in order to make the wax block rise at a constant speed, it is difficult to configure the solution density. [0003] In the textbook, the vector of "force" is used to verify the parallelogram rule. In actual operation, one person cannot complete it independently; when the spring balance is pulled by hand, it will cause large reading errors due to instability; the position of the node O cannot be co...

AI Technical Summary

Problems solved by technology

In actual operation, one person cannot complete it independently; when the spring balance is pulled by hand, it will cause large reading errors due to instability; the position of the node O cannot be completely overlapped even if the rubber strip is pulled twice back and forth; the rubber strip is elastic after being pulled many times will also weaken

The above factors will lead to large errors

[0004] The comparative document with the patent publication number CN2452070 discloses a motion synthesis demonstrator, which realizes horizontal displacement through the set track and motor, and a floating block with an iron block built in the glass tube, and the iron block in the glass tube A magnet device is set on the corresponding outer wall to simulate the movement of the slider in the vertical direction. The two movements are synthesized to form a joint motion, and the track is displayed on the background board; although the comparison file can also show the demonstration relationship of the joint motion, but using The buoyancy is used to realize the vertical rise of the floating block. The upward movement is affected by factors such as liquid density and atmospheric pressure, resulting in unstable movement, and the glass tube is easily broken after being hit, causing safety accidents.

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