Title:
PIEZOELECTRIC ACTUATOR, ACOUSTIC ELEMENT, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/026736
Kind Code:
A1
Abstract:
A piezoelectric actuator capable of providing high sound pressure and excellent frequency
characteristics when it is used as an acoustic element and advantageous for a
reduction in size. The piezoelectric actuator (50) comprises a piezoelectric element
(10) performing such an expansion/contraction motion that its principal plane
is expanded or contracted according to the state of a filed, a pedestal (24) on
which the piezoelectric element is stamped, and four beam parts (30) connected to
the outer peripheral parts of the pedestal (24). The pedestal (vibrating part) is
vertically vibrated according to the expansion/contraction motion of the piezoelectric
element (10). Each of the beam parts (30) comprises an extension part (35) extending
from the outer peripheral part of the pedestal (24) to the outside and a rise part
(36) continuously extended from the extension part (35) in a direction perpendicular
to the extended direction of the extension part (35).
Inventors:
ONISHI YASUHARU (JP)
SASAKI YASUHIRO (JP)
TOKI NOZOMI (JP)
SASAKI YASUHIRO (JP)
TOKI NOZOMI (JP)
Application Number:
PCT/JP2006/317054
Publication Date:
March 08, 2007
Filing Date:
August 30, 2006
Export Citation:
Assignee:
NEC CORP (JP)
ONISHI YASUHARU (JP)
SASAKI YASUHIRO (JP)
TOKI NOZOMI (JP)
ONISHI YASUHARU (JP)
SASAKI YASUHIRO (JP)
TOKI NOZOMI (JP)
International Classes:
B06B1/06; H02N2/00; H04R17/00
Foreign References:
| JP2003169118A | 2003-06-13 | |||
| JP2001339791A | 2001-12-07 | |||
| JP2000217195A | 2000-08-04 |
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (16th Kowa Bldg. 9-20, Akasaka 1-chome, Minato-k, Tokyo 52, JP)
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