Probability demonstration device

Abstract

The invention relates to a mathematical teaching device, and particularly relates to a probability demonstration device. The probability demonstration device comprises a device body, wherein the device body comprises a transparent circular ring, a coin storage cylinder and a coin throwing cylinder; the bottom of the coin storage cylinder is fixed on a second fixed plate; a first slot is formed inthe right side of the upper portion of the coin storage cylinder; a collecting pipe is connected to the upper part of the left side of the coin storage cylinder; the coin throwing cylinder is arrangedon the rear side of the coin storage cylinder; an ejection plate is arranged in the coin throwing cylinder; a rotating shaft is arranged on the outer right side of the coin storage cylinder and the coin throwing cylinder; a blade is arranged on the outer side of the top of the rotating shaft; a second opening and a first opening are sequentially formed in the blade from inside to outside; an annular plate is arranged in the second opening; a first spring is arranged below the annular plate; and when the probability demonstration is needed, a motor box below the rotating shaft is started to drive the blade to rotate, the annular baffle on the upper side of the blade takes out one coil and then throws the coil into the coin throwing cylinder as the rotating shaft rotates, the coin is ejected into the transparent circular ring in the coin throwing cylinder, and after statistics, the coins fall into the coin storage cylinder.

Description

technical field [0001] The invention mainly relates to a mathematics teaching device, in particular to a probability demonstration device. Background technique [0002] In the current classroom, teachers often use demonstration devices for demonstrations in order to facilitate students’ understanding. Especially when teaching probability, it is impossible to intuitively understand the content of the book just by lecturing. Coin experiments can get more accurate experimental results. However, during the experiment, the coin toss cannot be continued, and the demonstration efficiency is low. Manual coin toss may also bring interference from human factors and affect the experimental results. After the coin toss, it is necessary to throw The coin retrieval is cumbersome, and the existing coin tossing device cannot continuously and effectively carry out the coin tossing, and needs to manually recover the coins. At the same time, the existing demonstration device has a single funct...

AI Technical Summary

Problems solved by technology

[0002] In the current classroom, teachers often use demonstration devices to demonstrate for the convenience of students’ understanding. Especially when teaching probability, it is impossible to intuitively understand the content of the book just by lecturing. For example, tossing a coin requires multiple tosses Coin experiments can get more accurate experimental results, but during the experiment, the coin toss cannot be continued, and the demonstration efficiency is low. Manual coin toss may also bring interference from human factors, affecting the experimental results. After the coin toss, it is necessary to throw the coin The coin retrieval is cumbersome, and the existing coin tossing device cannot continuously and effectively perform coin tossing, and the coins need to be recovered manually. At the same time, the existing demonstration device has a single function and cannot perform other experiments

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