Headphone with cord take-up device

Details Headphone with cord take-up device Headphone with cord take-up device

2005-04-21

2009-02-17

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S371000, C381S381000

Reexamination Certificate

active

07492917

ABSTRACT:
In a headphone, accidental winding and retracting is prevented from occurring without requiring complicated operations. The headphone includes housings incorporating an electro-acoustic transducer element, an input cord, one end of which is connected to the electro-acoustic transducer element. A take-up mechanism is incorporated in the housings and energized to wind and retract the input cord into the housings. A ratchet interacts with the take-up mechanism to prevent the winding and retracting of the input cord by the take-up mechanism. A cancellation mechanism prevents the winding and retracting of the input cord by the ratchet. An ear-hook having an ear-hook arm hooks the housing on the arm and is energized toward the housings, wherein when the ear-hook arm is away from the housings so the prevention of the winding and retracting of the input cord by the ratchet is not cancelled.

REFERENCES:
patent: 6480611 (2002-11-01), Hashimoto et al.
patent: 7184565 (2007-02-01), Ohta
patent: 7372974 (2008-05-01), Yanagishita et al.
patent: 2000-253477 (2000-09-01), None
patent: 2001-346287 (2001-12-01), None
patent: 2002-10385 (2002-01-01), None
U.S. Appl. No. 10/562,450, filed Jun. 27, 2006, Ito.
U.S. Appl. No. 11/578,671, filed Oct. 17, 2006, Ito.

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