Patent ID: 7848087
Filing Date: 2010-12-07
Classification: H04R

Abstract:
1. An electronic device having a retractable earphone, comprising: a housing; a printed circuit board mounted within the housing; an earphone including a connecting cable and a head member, one end of the connecting cable connected to the printed circuit board, the other connected to the head member; and a retracting mechanism comprising a shaft portion, a spool, a torsion spring, and a latching member, the torsion spring having one end connected to the spool and the other end connected to the shaft portion; wherein, the connecting cable unwinds from the spool when the earphone is extended from the housing to an extended position, the connecting cable winds around the spool when the earphone is refracted into the housing to a retracted position; the latching member disengaging from the spool during transfer of the earphone between the extended position and the retracted position, and engaging with the spool to maintain the earphone in the extended position and the retracted position; and the torsion spring releasing a torsion force to automatically drive the earphone to move from the extended position to the retracted position when the latching member disengages from the spool, wherein the latching member is a button including a controlling portion and a resisting portion, the resisting portion connected to the controlling portion, the controlling portion being slidably mounted to the housing and pulled away from the housing when the latching member disengages from the spool, the resisting portion abutting against the spool and applying a friction force to bias the spool against rotating.