Title:
PIEZOELECTRIC ACTUATOR AND ELECTRONIC DEVICE HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/137478
Kind Code:
A1
Abstract:
A piezoelectric actuator enabling an easy designing and a large increase in impact resistance without lowering driving efficiency and an electronic device having the piezoelectric actuator. The piezoelectric actuator (31) is so formed that, when installed in a bottom board (14), the arm part (513) of a vibrator (50) is disposed in the clearance thereof from the projected part (144) through clearances (SP1) and (SP2) with prescribed dimensions. Merely by providing these clearances (SP1) and (SP2), a vibrating part (511) can be prevented from being moved beyond the dimensions of the clearances since the vibrating part (511) is caught by the projected part (144) on the free end part FR side when an external impact is applied thereto despite the fact that the free end part FR of the vibrator is freed in these clearances (SP1) and (SP2) in driving. Thus, the impact resistance of the piezoelectric actuator against falling impact can be easily and largely increased without lowering the driving efficiency, and problems in both the driving efficiency and impact resistance which are normally difficult to make compatible with each other can be solved.
Inventors:
Kitahara, Joji c/o Seiko Epson Corporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Sawada, Akihiro c/o Seiko Epson COrporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Sawada, Akihiro c/o Seiko Epson COrporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Application Number:
PCT/JP2006/312494
Publication Date:
December 28, 2006
Filing Date:
June 22, 2006
Export Citation:
Assignee:
SEIKO EPSON CORPORATION (4-1 Nishishinjuku 2-chome, Shinjuku-ku Tokyo, 11, 16308, JP)
Kitahara, Joji c/o Seiko Epson Corporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Sawada, Akihiro c/o Seiko Epson COrporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Kitahara, Joji c/o Seiko Epson Corporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
Sawada, Akihiro c/o Seiko Epson COrporation (3-5 Owa 3-chome, Suwa-sh, Nagano 02, 39285, JP)
International Classes:
H02N2/00; G04C3/12; H01L41/09; H02N2/00; G04C3/00; H01L41/09
Attorney, Agent or Firm:
Kinoshita, Jitsuzo (3rd. floor, Ogikubo TM building 26-13, Ogikubo 5-chome, Suginami-k, Tokyo 51, 16700, JP)
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