Patent ID: 8226424

Claim:
A plug device comprising: a base having a transformer circuit mounted in the base; a first connecting component disposed on a top of the base and having a mounting recess formed in a top of the first connecting component; an inner peripheral surface defined around the mounting recess; a bottom defined in the mounting recess; and at least one positioning protrusion formed on the inner peripheral surface and spaced out from the bottom; and at least two conductive connectors slidably mounted through the bottom of the first connecting component and electrically connected to the transformer circuit; and an adapter detachably mounted on the base and having a housing having a mounting panel having at least two mounting holes separately formed through the mounting panel; and an outer cover corresponding to and securely mounted on the mounting panel; at least two conductive sheets mounted on the mounting panel of the housing, respectively corresponding to the at least two mounting holes of the mounting panel, protruding out from a bottom of the housing and selectively and electrically connected respectively to the at least two conductive connectors of the base, and each of the at least two conductive sheets having a conductive portion protruding through a corresponding mounting hole of the mounting panel and electrically connected to a corresponding conductive connector of the base; at least two prongs mounted through the housing and respectively connected to the at least two conductive sheets; and a second connecting component being cylindrical and hollow, disposed on the bottom of the housing, disposed around the mounting holes of the mounting panel, detachably connected to the first connecting component of the base and having an outer peripheral surface; a peripheral end edge; and at least one positioning groove formed in the outer peripheral surface of the second connecting component and selectively engaging the at least one positioning protrusion of the first connecting component, and each of the at least one positioning groove having an inserting portion longitudinally formed in the outer peripheral surface of the second connecting component and through the peripheral end edge of the second connecting component; and a holding portion transversely formed in the outer peripheral surface of the second connecting component and communicating with the inserting portion.