Headphone having a cord reel

A headphone comprising:

• a housing assembly having an electroacoustic transducer accommodated therein and an insertion hole defined therein;
• an input cord having an input plug secured to one end thereof, said input cord being connected at the other end thereof to said electroacoustic transducer;
• and
• a winding mechanism accommodated in said housing assembly for winding said input cord in said housing assembly, said winding mechanism comprising:
• a cord reel biased to wind said input cord therearound;
• and
• an engagement member pivotally mounted in said housing assembly;
• wherein when said input plug is inserted into said insertion hole, said input plug rotates said engagement member in a first direction, which in turn allows said cord reel to wind said input cord therearound, and when said input plug is removed from said insertion hole, said engagement member rotates in a second direction counter to the first direction, allowing said input cord to be drawn out of said housing assembly and preventing said cord reel from winding said input cord therearound.