Double wire cord and portable audio device using the same

Details Double wire cord and portable audio device using the same Double wire cord and portable audio device using the same

2008-03-25

2008-03-25

Nguyen, Chau N. (Department: 2831)

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

C174S115000

Reexamination Certificate

active

07348490

ABSTRACT:
A double wire cord is used in an electro-acoustic converter, such as earphones and headphones, and has a long first cord and a long second cord. For example, the first cord is substantially circular in cross section and has a large diameter, the second cord is also substantially circular in cross section and has a small diameter, and the second cord can be removably housed in the first cord. The second cord is fitted into the fitting groove of the first code and thus housed in the first cord by pressing the side surface of the second cord against the fitting groove of the first cord, so that one wire cord can be easily provided. Therefore, it is convenient at the time of use and storage.

REFERENCES:
patent: 6639152 (2003-10-01), Glew et al.
patent: 6751382 (2004-06-01), McGarvey
patent: 2007/0080186 (2007-04-01), deLeon et al.
patent: 1 509 062 (2005-02-01), None
patent: 07-211146 (1995-08-01), None
patent: 2004-056636 (2004-02-01), None

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