Folding collapsible wireless transmitter-receiver earphone

A folding collapsible wireless transmitter-receiver earphone comprising a base unit, an extension unit extended from one end of said base unit, a circuit board mounted inside said base unit, a speaker mounted in said base unit and electrically connected to said circuit board, a microphone mounted in said extension unit, and a signal line connected between said circuit board and said microphone, wherein said base unit comprises an axle holder disposed at one end thereof, said axle holder comprising a chamber disposed in communication with the inside space of said base unit and an opening in a bottom side of said chamber;

• said extension unit comprises a hollow pivot shaft transversely disposed at one end thereof and pivoted to the chamber of said base unit, said hollow pivot shaft having a side opening disposed in communication with the bottom opening of said axle holder for the passing of said signal line from the circuit board in said base unit to the microphone in said extension unit.