Extension socket

An extension socket comprises an extension socket body and an external plug, a copper piece unit respectively extends into a first connecting piece, a second connecting piece and a third connecting piece to better carry out overload protection and circuit circulation of a circuit, and meanwhile, the copper piece unit is a non-welding integrated copper piece, so that the conductivity is better; through the arrangement of the first connecting piece, the second connecting piece and the third connecting piece, the extension socket body can keep a stable working transition state and can adapt to the use of more plugs, the bending forming technology is adopted, and the production efficiency is improved. The main line connecting end and the branch line connecting end are in firmer contact with the first connecting piece, the second connecting piece and the third connecting piece, the reaction efficiency of extension of an external plug is further improved, meanwhile, the extension socket cannot be inserted into a si