Title:
振動装置及び音響システム
Document Type and Number:
Japanese Patent JP5021741
Kind Code:
B2
Abstract:
A vibration device according to the present invention includes: a diaphragm; a support system member that supports the diaphragm in a manner that allows the diaphragm to vibrate; a tubular voice coil bobbin attached to the diaphragm; a magnet which is disposed on at least one side among an inner circumferential surface side and an outer circumferential surface side of the voice coil bobbin, and which is polarized in a vibration direction of the diaphragm, and which forms a magnetic gap on a side that faces the voice coil bobbin; a voice coil which is attached to the voice coil bobbin so as to be disposed within the magnetic gap, and which vibrates the diaphragm and the voice coil bobbin in response to a driving force generated when an input electrical signal is inputted into the voice coil; and a magnetic material member which is attached to the voice coil bobbin so as to be disposed in a balancing position within the magnetic gap, and which is, when vibrating together with the voice coil bobbin, subjected to an action of a magnetic attractive force in a direction away from the balancing position.
Inventors:
Koichi Kuze
Shuji Saeki
Toshiyuki Matsumura
Shuji Saeki
Toshiyuki Matsumura
Application Number:
JP2009523533A
Publication Date:
September 12, 2012
Filing Date:
July 09, 2008
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H04R9/04; H04R1/02; H04R1/28; H04R3/04; H04R9/02
Domestic Patent References:
| JP2002112387A | 2002-04-12 |
Attorney, Agent or Firm:
Patent business corporation Ogasawara patent office
Kaoru Kuwahara
Takeji Takada
Kaoru Kuwahara
Takeji Takada