Patent ID: 8888523

Claim:
An extension apparatus of a power outlet, comprising: a main body, comprising: a plug portion defining a live through hole and a neutral through hole, wherein two first metal pieces are arranged in the live through hole and the neutral through hole, respectively; and an extension plug portion defining a live blind hole and a neutral blind hole, wherein two second metal pieces are arranged in the live blind hole and the neutral blind hole, respectively, the first metal piece in the live through hole is coupled to the second metal piece in the live blind hole through a first conductive piece, and the first metal piece in the neutral through hole is coupled to the second metal piece in the neutral blind hole through a second conductive piece; and a socket comprising a base, a first pin, and a second pin, wherein the first and second pins are mounted to the base, the base defines a first plug hole and a second plug hole, two third metal pieces are arranged in the first and second plug holes, respectively, and respectively connected to the first pin and the second pin, the first pin and the second pin are respectively engaged in the live blind hole and the neutral blind hole, to be respectively connected to the second metal pieces.