Patent ID: 7492917

Claim:
A headphone with a cord take-up device, comprising: a housing incorporating an electro-acoustic transducer element; an input cord, one end of which is connected to said electro-acoustic transducer element; take-up means incorporated in said housing and energized to wind and retract said input cord into said housing; ratchet means interacting with said take-up means and preventing the winding and retracting of said input cord by said take-up means as well as allowing said input cord to be pulled out of said housing; cancellation means canceling the prevention of the winding and retracting of the input cord by said ratchet means; and ear-hook means in which an ear-hook arm for hooking said housing on the ear is energized toward said housing side; wherein when said ear-hook arm is away from said housing, the prevention of the winding and retracting of said input cord by said ratchet means is not cancelled.