Patent ID: 7465893

Claim:
A rolling-ball switch comprising: an insulative housing having an outer surface, a tubular wall that has an axial hole and two opposite open-end portions, each of said open-end portions having an end face and a retaining portion, said retaining portion having an annular engaging groove formed in an inner wall face of said tubular wall; two lead terminals covering respectively said open-end portions, each of said lead terminals being a one-piece conductive body and being provided with an engaging portion; and a ball unit disposed rollably in said axial hole to contact said lead terminals; wherein each of said lead terminals includes an insert portion disposed in said axial hole, and an end cap portion extending outwardly of the respective one of said open-end portions and abutting against said end face, said engaging portion having an annular protrusion formed on an outer surface of said insert portion to engage said annular engaging groove; wherein said outer surface of said insert portion is further formed with a plurality of axial ribs to contact frictionally said inner wall face of said tubular wall, an annular receiving groove adjacent to said end cap portion, and a sealing gasket disposed in said annular receiving groove; and wherein said outer surface of said insulative housing has a middle portion higher than portions at two opposite sides of said middle portion.