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Patent Searching and Data


Title:
スピーカ装置
Document Type and Number:
Japanese Patent JP4447356
Kind Code:
B2
Abstract:
In a speaker device, each inner peripheral edge portion of a conductive damper and an ordinary damper is fixed to an area in the vicinity of a lower end of a cylindrical portion of a connecting member, and each outer peripheral edge portion of them is fixed to a support member. The conductive and ordinary dampers are attached to an area within a constant winding width of a voice coil. When the speaker device is driven, the voice coil bobbin vibrates in an axial direction of the speaker device. The voice coil bobbin sometimes rolls due to various factors. Since a fulcrum of the rolling is within the winding width, a distance r2 from the fulcrum P11 to an intersection of a central axis of the speaker device and a plane surface including a center in the winding width becomes short, and the bobbin hardly rolls.

Inventors:
Tomoyuki Watanabe
Application Number:
JP2004080126A
Publication Date:
April 07, 2010
Filing Date:
March 19, 2004
Export Citation:
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Assignee:
Pioneer Corporation
Tohoku Pioneer Co., Ltd.
International Classes:
H04R9/02; H04R9/04; H04R1/00; H04R7/12; H04R9/06; H04R11/02
Domestic Patent References:
JP2002051394A
JP2001268690A
JP2002271893A
JP2002291097A
JP61146091U
Attorney, Agent or Firm:
Satoshi Nakamura
Tatsuo Egami