PIEZOELECTRIC ACTUATOR

WIPO Patent Application WO/2010/032624

A1

An SIDM device (1) is provided with a pillar-shaped piezoelectric element (2) which expands/contracts in the axial direction by the application of a voltage, a pillar-shaped drive shaft (3) which is fixed to the end surface of the piezoelectric element (2) in the axial direction and is displaced by the expansion/contraction of the piezoelectric element (2), a supporting member (4) which has a fixed portion (40) fixed to the drive shaft (3) and supports the piezoelectric element (2) and the drive shaft (3) with the fixed portion (40) between the supporting member (4), and the piezoelectric element (2) and the drive shaft (3), and a moving body (5) which is frictionally engaged with the drive shaft (3) and moves in the axial direction of the drive shaft (3).  A central axis (L2) of the piezoelectric element (2) and a central axis (L3) of the drive shaft (3) are offset to each other, and the central axis (L3) of the drive shaft (3) and a central axis (L4) of the drive shaft (3) in the axial direction in the entire fixed portion (40) are offset to each other.  As a result, the drive shaft is able to accurately perform oscillating motion.

WO/2009/151081	PIEZOELECTRIC ACTUATOR, LENS BARREL AND OPTICAL DEVICE
JP4224946	Drive device
WO/2009/096346	ULTRASONIC WAVE GENERATING DEVICE, AND APPARATUS HAVING THE DEVICE

YONETAKE JUNICHIROU (JP)
SHIBATANI KAZUHIRO (JP)
SAEKI YOSHIHIRO (JP)

PCT/JP2009/065400

March 25, 2010

September 03, 2009

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KONICA MINOLTA OPTO INC (JP)
YONETAKE JUNICHIROU (JP)
SHIBATANI KAZUHIRO (JP)
SAEKI YOSHIHIRO (JP)

H02N2/00; G02B7/04; H01L41/09

JP2007181384A	2007-07-12
JP2007267538A	2007-10-11
JP2007274757A	2007-10-18
JP2002095274A	2002-03-29

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