Speaker voice coil and speaker unit using the same

Details Speaker voice coil and speaker unit using the same Speaker voice coil and speaker unit using the same

2006-05-18

2010-12-07

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S400000

Reexamination Certificate

active

07848538

ABSTRACT:
A thread winding part or a reinforcing wire winding part is formed by winding a heat resistant fiber thread or a reinforcing wire around the voice coil bobbin in contact with both coil ends of the wire winding part or a coil end of the same on a magnetic-circuit side. A bent part bent outward is formed on the lower end of the voice coil bobbin on the magnetic circuit side. This prevents the wire winding part from shifting from its mounting position and from coming off to the lower side. In the resulting voice coil, the wire winding part hardly comes off the voice coil bobbin even if the wire binding of the wire winding part is loosened by Joule heat, speaker vibrations, etc.

REFERENCES:
patent: 3963882 (1976-06-01), Lewis
patent: 6421449 (2002-07-01), Hasegawa et al.
patent: 7729503 (2010-06-01), Young
patent: 08-168095 (1996-06-01), None

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