Patent ID: 7829804

Claim:
A rolling-ball switch adapted to be fixed on a circuit board, said rolling-ball switch comprising: a longitudinal conductive housing having an inner wall defining a receiving space, and the housing having two open ends that are opposite to each other in a longitudinal direction, said receiving space having first and second widths between the inner wall along first and second transverse directions that are transverse to the longitudinal direction and that are perpendicular to each other; two conductive balls disposed movably in said receiving space; two insulation caps covering respectively said open ends of said conductive housing to confine said conductive balls in said receiving space; and two terminals connected fixedly and respectively to said insulation caps, each of said terminals including an inner section extending into said receiving space; wherein said first width is larger than the sum of diameters of said two conductive balls, said second width is larger than the diameter of each of said conductive balls, and the diameter of each of said conductive balls is larger than a distance between said inner section of one of said terminals and the inner wall of said conductive housing; and wherein said two conductive balls are capable of simultaneously bridging said inner section of one of said terminals and said inner wall of said conductive housing to establish therebetween an electrical connection.