Patent attributes
A rolling-ball switch includes an insulative casing part having first and second connecting faces and an intermediate through hole, insulative first and second covering parts each having a recessed inner side that covers the respective connecting face, and two metal plates respectively disposed between the first covering part and the first connecting face and between the second covering part and the second connecting face. The first and second recessed inner sides and the intermediate through hole cooperatively define a chamber. Each metal plate includes an inner peripheral edge having an edge portion projecting into the chamber. A conductive ball is disposed movably in the chamber, and has a diameter larger than a distance between the edge portions of the metal plates so that the conductive ball can bridge the edge portions of the metal plates to place the rolling-ball switch in an ON state.
