Earphone device and sound-reproducing system using the same

An earphone device comprising:

• a first earphone body in which an electro-acoustic transducer is built;
• a first cable one end of which is connected to the first earphone body and within which a first cable switch is disposed over a predetermined range along the length direction of the first cable, the first cable switch being activatable by a unidirectional press over the entire predetermined range of the first cable;
• a second earphone body in which an electro-acoustic transducer is built;
• and
• a second cable one end of which is connected to the second earphone body and within which a second cable switch is disposed over a predetermined range along the length direction of the second cable, the second cable switch being activable by a undirectional press over the entire predetermined range of the second cable;
• wherein portions of the first and second cable switches are overlapped, a first switch function is effected by a unidirectional press of a non-overlapped portion of the first cable switch, a second switch function is effected by a unidirectional press of a non-overlapped portion of the second cable switch, and a third switch function is effected by a unidirectional press of the overlapped portions of the first and second cable switches.