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Probability demonstration device

A demonstration device and probability technology, applied in the field of teaching, can solve the problems of sore arms and hands, complicated operation, troublesome and other problems, and achieve the effect of reducing work intensity and facilitating statistics.

Inactive Publication Date: 2020-06-02
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the coin tossing demonstration process is mostly manually tossing the coin multiple times. The operation is more complicated. If the number of manual tossing is large, it is also more troublesome. After a long time, the arms and hands will feel tired

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Basic as attached Figure 1-Figure 3Shown: a probability demonstration device, including a base 9, a coin storage unit, a coin-operating unit and a coin-receiving unit, the coin-operating unit includes a launching cylinder 20, an inversion cavity 17 and a discharging cylinder 16, the launching cylinder 20, and the discharging cylinder 16 It is welded together with the turning cavity 17, and a supporting frame (not shown in the figure) is connected between the coin-operating unit and the base 9, thereby supporting the coin-operating unit. The launching tube 20 and the discharging tube 16 are all communicated with the turning cavity 17, the launching tube 20 is positioned at the left side of the discharging tube 16, the launching tube 20 and the discharging tube 16 are all vertically arranged, the welding between the launching tube 20 and the turning cavity 17 There is an arc-shaped cylinder 18, and the launching cylinder 20 and the discharging cylinder 16 are all located...

Embodiment 2

[0036] combine Figure 4 As shown, in this embodiment, the top of the connection between the arc-shaped cylinder 18 and the turning chamber 17 is connected with an inclined cover plate 37 through a pin shaft rotation.

[0037] Thus, when the coin comes out of the arc tube 18, the coin impacts the cover plate 37, thereby pushing the cover plate 37 away, and the cover plate 37 will not block the coin from coming out of the arc tube 18. When the coin leaves the arc tube 18, the cover plate 37 will automatically cover the top of the arc tube 18 under the action of its own gravity, thereby preventing the coins entering the turning chamber 17 from entering the arc tube 18 by mistake, and the energy can be 100%. It is guaranteed that the coin enters the discharge cylinder 16 from the turning cavity 17, and compared with Embodiment 1, the possibility of the coin returning to the arc-shaped cylinder 18 is further avoided. In addition, since the cover plate 37 is inclined, even if the ...

Embodiment 3

[0040] combine Figure 5 and Figure 6 As shown, in this embodiment, another structure of the rotating disk 14 is improved. The rotating disk 14 includes a receiving part 5 and a collecting part 4 located below the receiving part 5. The receiving part 5 communicates with the collecting part 4, and the receiving part 5 and the collecting part Part 4 is provided with a chamber for containing coins, and the middle part of the rotating disk 14 is welded with a fixed shaft 7, and a number of movable leaves 6 are rotationally connected between the fixed shaft 7 and the inner wall of the receiving part 5. Specifically, the movable leaves 6 are fan-shaped , the small end of the movable leaf 6 is connected with the fixed shaft 7 by pin rotation, the large end of the movable leaf 6 is connected with the receiving part 5 by the pin shaft, and the two sides of the movable leaf 6 are provided with coin receiving grooves 8, The pin shafts on the big ends of the two adjacent movable leaves ...

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Abstract

The invention relates to the field of teaching, in particular to a probability demonstration device. The probability demonstration device comprises a base, a coin storage unit, a coin insertion unit and a coin receiving unit, wherein the coin inserting unit comprises a launching barrel, an overturning cavity and a discharging barrel; the launching barrel and the discharging barrel are both communicated with the overturning cavity; an arc-shaped barrel is connected between the launching barrel and the overturning cavity; a push plate is slidably connected into the launching barrel; a first pressure spring is connected between the end, away from the overturning cavity, of the launching barrel and the push plate; a pull rod is fixedly connected to the push plate; the end, away from the push plate, of the pull rod is located on the outer side of the launching barrel and fixedly connected with a first magnet; a second magnet intermittently attracting the first magnet is arranged on the base; and the end part of the discharging barrel is opposite to the coin receiving unit. According to the probability demonstration device, automatic throwing of coins is realized.

Description

technical field [0001] The invention relates to the teaching field, in particular to a probability demonstration device. Background technique [0002] Probability is a concept defined by people according to the law of random events. Mathematical statistics and probability theory are important courses in university mathematics. In the advanced mathematics of universities, teachers often do some experiments that are relatively easy to understand in order to enable students to learn the knowledge of probability more intuitively. Among them, the most common experiment is the coin tossing experiment. By counting the number of times the coin faces up or tails up, it is proved that the probability of the coin facing up and tails up is equal. [0003] At present, the coin tossing demonstration process is mostly manually tossing the coin multiple times, and the operation is relatively complicated. If the number of manual tossing is large, it is also troublesome. After a long time, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/02
CPCG09B23/02
Inventor 王海萍
Owner CHONGQING UNIV OF ARTS & SCI
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