SPEAKER DEVICE - SONY CORP

Title:

SPEAKER DEVICE

Document Type and Number:

WIPO Patent Application WO/2016/088459

Kind Code:

A1

Abstract:

The objective of the present invention is to maintain a satisfactory sound output condition over a wide band, in the context of reducing drive losses with respect to a vibrating plate. A speaker device is provided with: an annular coil bobbin at least a portion of which is disposed between a yoke and a magnet; a coil which is wound around the coil bobbin and to which a drive current is supplied, and which is caused to oscillate together with the coil bobbin; a piezoelectric element, one end portion of which is joined to one end portion of the coil bobbin, in the direction of oscillation, and to which a current is supplied causing said piezoelectric element to expand and contract, and to oscillate in the same direction as the direction of oscillation of the coil bobbin; and a vibrating plate, an inner peripheral portion of which is joined to the other end portion of the piezoelectric element. The part where the vibrating plate is joined to the piezoelectric element, and the part where the piezoelectric element is joined to the coil bobbin are disposed on one straight line in the direction of oscillation.

More Like This:

WO/2013/150326	PASSIVE WIRELESS MICROPHONE
JPS58176499	[Title of the device] Compounded type speaker

Inventors:

TAGAMI TAKAHISA (JP)
SUZUKI NOBUKAZU (JP)
FUJISHITA KANEAKI (JP)

Application Number:

PCT/JP2015/079416

Publication Date:

June 09, 2016

Filing Date:

October 19, 2015

Export Citation:

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Assignee:

SONY CORP (JP)

International Classes:

H04R23/02; H04R9/04; H04R17/00

Domestic Patent References:

WO2005067346A1

2005-07-21

Foreign References:

JPS59112799A	1984-06-29
JP2014068342A	2014-04-17
JPH09322286A	1997-12-12

Other References: