Diaphragm for loud speaker and loud speaker employing it

Details Diaphragm for loud speaker and loud speaker employing it Diaphragm for loud speaker and loud speaker employing it

2008-01-01

2008-01-01

Le, Huyen (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S423000

Reexamination Certificate

active

07315628

ABSTRACT:
The present invention provides a diaphragm for a loudspeaker which suppresses divided resonance and shows a stable sound-pressure-frequency characteristic, and a loudspeaker using the diaphragm. The diaphragm includes three or more thick parts (11c) of odd numbers formed radially from a center part to an outer periphery, and semi thick part (11d) formed between the thick parts so as to become thinner gradually from the outer periphery to the center part. Web shaped thin part (11e) is formed at an inner part of the semi thick part.

REFERENCES:
patent: 6026929 (2000-02-01), Faraone
patent: 6863153 (2005-03-01), Hayakawa et al.
patent: 2005/0078850 (2005-04-01), Norton
patent: 53-119023 (1978-10-01), None
patent: 55-147898 (1980-11-01), None
patent: 6-149594 (1996-06-01), None
patent: 11-075290 (1999-03-01), None
patent: 2000-308178 (2000-11-01), None

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