US Patent 10283893 Electrical plug device

An electrical plug device includes a housing, a cover unit mounted to the housing and a plug module mounted to the cover unit. The housing includes a base wall, a slot forming wall peripherally extending from the base wall, an engaging-groove forming wall peripherally extending from the base wall and opposite to the slot forming wall, and at least one slot formed in the slot forming wall and extending to and meeting the base wall. The plug module extends into the housing and includes a plug member fixed to the cover unit by a fixing unit. The plug member includes at least one plug prong that is movably disposed in the at least one slot to pivot between a folded position and an unfolded position.