| 摘要 |
A universal electric adapter includes a casing injection-molded from plastics, the casing having a front face panel, two lateral receiving chambers, a middle receiving chamber, a locating groove inside the middle receiving chamber, a plurality of coupling flanges radially inwardly disposed around a rear open side thereof, a positioning projection radially inwardly suspended in the rear open side, and two locating grooves bilaterally disposed at the periphery thereof; two metal contact frames respectively installed in the lateral receiving chambers the metal contact frames each having a protruded contact strip; a grounding frame installed in the middle receiving chamber, the grounding frame having a contact base, and a locating flange fastened to the locating groove inside the middle receiving chamber; a plug member fastened to the rear open side of the casing, the plug member having a plurality of metal prongs adapted for fastening to an electric socket, a plurality of coupling grooves spaced around the periphery thereof and respectively engaged with the coupling flanges of the casing, and a plurality of peripheral notches respectively disposed in communication with the coupling grooves of the plug member and adapted to receive the coupling flanges of the casing for enabling the coupling flanges of the casing to be respectively forced into engagement with the coupling grooves of the plug member upon a relative rotation motion between the plug member and the casing; and two grounding plates respectively fastened to the locating grooves of the casing and disposed in contact with the grounding frame.
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