Electrical adapter with dual plug structure

Claim 1

A dual-plug electric adapter comprising: a base portion including: a casing defining an interior space, a cavity being defined in the casing and in communication with the interior space, a socket having first and second slots defined in the casing and adapted to receive first and second blades of an external plug, and a circuit board arranged in the interior space of the casing, first and second blade-engaging members made of conductive materials being mounted on the circuit board and substantially corresponding to the first and second slots of the socket of the casing for electrically engaging the first and second blades of the external plug, first and second pairs of conductive, resilient leaves formed on the circuit board and respectively electrically connected to the first and second blade-engaging members; a plug portion including: a primary plug movably received in the cavity and having first blades of a first configuration adapted to engage an external electric socket of a first kind, the primary plug having first conductive pads electrically connected to the first blades, wherein the primary plug is movable between a non-operative position and an operative position where the first conductive pads electrically engage the first pair of conductive leaves of the circuit board, and a secondary plug having second blades of a second configuration adapted to engage an external electric socket of a second kind, the secondary plug having second conductive pads electrically connected to the second blades, wherein the secondary plug is movable between a non-operative position and an operative position where the second conductive pads engage the second pair of conductive leaves of the circuit board; and, a retainer fixed in the cavity, the retainer defining pivot holes for rotatably receiving pivots extending from opposite sides of the primary plug for rotatably supporting the primary plug in the cavity the retainer further defining four slots respectively and partially receiving the resilient leaves therein.