SOUND VIBRATION GENERATING DEVICE AND ELECTRONIC INSTRUMENT

WIPO Patent Application WO/2018/051802

A1

Provided is a sound vibration generating device which has a simple construction and with which it is possible for a sound pressure frequency characteristic in a target frequency band to be matched to a requirement. A sound vibration generating device (1) includes a flat plate-shaped vibrating plate (10), a piezoelectric element (20), a first weight (30), and a first deflection suppressing portion (60). One end portion, in the longitudinal direction, of the vibrating plate (10) is secured by means of a securing portion (50), and another end portion thereof is a free end. The piezoelectric element (20) is disposed in a first region close to the securing portion (50) of the vibrating plate (10), and is driven by being supplied with electric power. The first weight (30) is disposed adjacent to the piezoelectric element (20) in a second region of the vibrating plate (10), further from the securing portion (50) than is the first region. The first deflection suppressing portion (60) is disposed in a first inflection region of the vibrating plate (10), located between the piezoelectric element (20) and the first weight (30) in the longitudinal direction, and suppresses deflection of the vibrating plate (10).

IKEZAWA NORIAKI (JP)
YAMAZAKI OSAMU (JP)
KATSUNO MASAFUMI (JP)
ABE YOSHIYUKI (JP)
KUMASAKA KATSUNORI (JP)

PCT/JP2017/031405

March 22, 2018

August 31, 2017

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TOKIN CORP (JP)

H04R17/00; H04R7/04; H04R7/26

JP2015111810A	2015-06-18
JP2010245842A	2010-10-28
JP2000223998A	2000-08-11

IEIRI Takeshi (JP)

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