Acoustics – Diaphragm – Mounting or suspension means
Reexamination Certificate
2008-01-08
2008-01-08
Donovan, Lincoln (Department: 2837)
Acoustics
Diaphragm
Mounting or suspension means
C181S166000, C181S172000, C381S190000, C381S191000, C381S396000, C381S400000, C381S403000, C381S404000, C381S405000, C381S420000
Reexamination Certificate
active
10499189
ABSTRACT:
An electro-acoustic transducer includes a tone generator, a vibrator, and a case. The tone generator includes a diaphragm, and a voice coil joined to the diaphragm. The vibrator includes a magnetic circuit having a magnetic gap at which the voice coil is positioned, and a suspension made of metal and having a first end joined to the magnetic circuit to suspend the magnetic circuit for allowing the magnetic circuit to vibrate. The case is joined to a periphery of the diaphragm, and includes a metal plate joined to a second end of the suspension. The metal plate is joined to the suspensions reliably, hence allowing the electro-acoustic transducer to be manufactured stably.
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International Search Report for application No. PCT/JP03/12951 dated Jan. 20, 2004.
Ajiki Kenichi
Ando Kimihiro
Kawabe Masashi
Donovan Lincoln
Matsushita Electric - Industrial Co., Ltd.
Phillips Forrest
RatnerPrestia
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