Title:
SPEAKER
Document Type and Number:
WIPO Patent Application WO/2008/023419
Kind Code:
A1
Abstract:
A drive cone (11) and a diaphragm (14) are driven integrally by a voice coil (6) arranged
movably in a magnetic gap (5). Circumferential edges of the drive cone (11) and
the diaphragm (14) are supported by a frame (12) through edges (13, 15), respectively.
A rising portion (11a) rising toward the sound radiation direction from the inner
circumferential end, and a falling portion (11b) falling in a direction reverse
to the sound radiation direction are formed on the drive cone (11), and the inner
circumferential edge of the diaphragm (14) is fixed to the annular top formed
between the rising portion and the falling portion. Furthermore, a first rib
(11c) and a second rib (11d) are formed on the drive cone (11) to rise toward the
sound radiation direction integrally with the drive cone, and the diaphragm (14)
is also supported at the distal ends of these ribs.
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Inventors:
KAIYA, Teruaki (1105 Aza-Nikko Oaza-Kunomoto,Tendo-sh, Yamagata 85, 9948585, JP)
Application Number:
JP2006/316576
Publication Date:
February 28, 2008
Filing Date:
August 24, 2006
Export Citation:
Assignee:
Pioneer Corporation (1-4-1 Meguro, Meguro-ku Tokyo, 54, 1538654, JP)
パイオニア株式会社 (〒54 東京都目黒区目黒１－４－１ Tokyo, 1538654, JP)
Tohoku Pioneer Corporation (1105 Aza-Nikko, Oaza-Kunomoto Tendo-sh, Yamagata 85, 9948585, JP)
パイオニア株式会社 (〒54 東京都目黒区目黒１－４－１ Tokyo, 1538654, JP)
Tohoku Pioneer Corporation (1105 Aza-Nikko, Oaza-Kunomoto Tendo-sh, Yamagata 85, 9948585, JP)
International Classes:
H04R9/04; H04R7/16
Attorney, Agent or Firm:
KINOSHITA, Shigeru (Kawasaki East One Bldg, 11F. 11-1, Ekimaehoncho, Kawasaki-k, Kawasaki-shi Kanagawa, 210-0007, JP)
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