Title:
複数磁石のスピーカ
Document Type and Number:
Japanese Patent JP2011504053
Kind Code:
A
Abstract:
A loudspeaker provides increased magnetic flux from multiple magnets to drive voice coils to generate sound. The loudspeaker is formed as a smaller profile and reduced weight package. The loudspeaker includes a dual pole, first and second magnets, first and second front plates, and first and second gaps. The polarities of the first and second magnets are aligned in the same direction. The first and second magnets may be disk or ring-shaped and may be coupled to a flange of the dual pole. The first and second gaps may be formed between the inner diameters of the first and second magnets and the dual pole. The magnetic flux produced by the first and second magnets may be combined, directed, and concentrated within the first and second gaps by the dual pole and the front plates. At least portions of a first and a second voice coil may be positioned within the first and second gaps, respectively, and diaphragms may be coupled to the first and second voice coils.
Inventors:
Andrew, Holt
Hog, Douglas K.
Canada, Michael A.
Hog, Douglas K.
Canada, Michael A.
Application Number:
JP2010534153A
Publication Date:
January 27, 2011
Filing Date:
November 13, 2008
Export Citation:
Assignee:
Harman International Industries, Inc.
International Classes:
H04R9/02; H04R1/24; H04R9/06
Domestic Patent References:
| JPS5179329U | 1976-06-23 | |||
| JP2000184482A | 2000-06-30 | |||
| JPH01288197A | 1989-11-20 | |||
| JPS5451817A | 1979-04-24 | |||
| JPS5040125A | 1975-04-12 | |||
| JPS49111616A | 1974-10-24 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita