A probabilistic event interesting teaching model

The invention relates to a probabilistic event interesting teaching model which comprises a shell, wherein a cam is connected to the shell through a rotating shaft. A first sliding rod sliding radially along the axis of the rotating shaft is arranged on the shell, and the first sliding rod slides to the axis direction of the rotating shaft through a first spring elastic force, so that the first sliding rod is in extrusion contact with an outer edge surface on the cam; and a second sliding rod sliding radially along the axis of the rotating shaft. The shell is provided with a contact switch, and the first slide bar is provided with a dial block corresponding to the contact switch. The invention simplifies the steps of random event demonstration and statistics, shortens the time of demonstration and statistics, has high demonstration and statistics efficiency, good portability, and supports a plurality of sampling statistics methods. 本发明涉及种概率事件趣味教学模型，包括壳体，所述的壳体上经转轴连接有凸轮，壳体上有沿转轴的轴线径向滑动的第滑杆，所述的第滑杆经第弹簧弹力向转轴的轴线方向滑动