Abstract
A rotating device includes a seat at least part of which includes magnetic attraction coupling means and a rotating body which includes a housing having a central axis of rotation and magnetic attraction coupling means arranged in, and relatively rotatable about the central axis of rotation to, the housing. When the rotating body is placed on the seat, the magnetic attraction coupling means in the housing and the magnetic attraction coupling means of the at least part of the seat attract each other by magnetic force so that the magnetic attraction coupling means in the housing of the rotating body is stationary with respect to the at least part of the seat. The housing of the rotating body and the magnetic attraction coupling means therein are relatively rotatable to each other through a motor.