Patent ID: 7458814

Claim:
A twist prevention socket, comprising: a housing; a first plug provided in an insertion part of the housing, the first plug being connected to a jack of a power cord; a second plug provided in the housing at a position opposite the first plug and comprising a first contact member and a second contact member, which are connected to respective connection wires connected to the first plug, the first and second contact members being prevented from being electrically connected to each other and having an arrangement of concentric circles; mediating means, comprising a first connection member, connected to the first contact member of the second plug, and a second connection member, connected to the second contact member of the second plug and electrically separated from the first connection member; and locking means, comprising an elastic compressing member provided adjacent to the second plug and the mediating means to ensure no-load operation of the second plug with respect to the mediating means and provide a predetermined resistance to removal of the second plug from the mediating means.