Title:
Operation device
Document Type and Number:
Japanese Patent JP6191717
Kind Code:
B2
Abstract:
A displacement sensor (10) has a long elastic member (20) having a rectangular shape. A piezoelectric element (30) is attached to a first main face of the elastic member (20). The piezoelectric element (30) has a long rectangular-shaped piezoelectric sheet (300) and electrodes (301 and 302) formed on both main faces of the piezoelectric sheet (300). The piezoelectric sheet (300) is made of poly-L-lactic acid and is at least uniaxially-stretched. The piezoelectric element (30) is attached so that the uniaxial-stretching direction of the piezoelectric sheet (30) forms 45° from a long-side direction of the elastic member (20). When the elastic member (20) is bent along the long-side direction, the piezoelectric sheet (300) is stretched along the long-side direction, and the piezoelectric element (30) generates voltage of predetermined level.
Inventors:
Masamichi Ando
Hideki Kawamura
Hideki Kawamura
Application Number:
JP2016054693A
Publication Date:
September 06, 2017
Filing Date:
March 18, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
G06F3/01; H01L41/113; H01L41/193; H03K17/96; H03K17/965
Domestic Patent References:
| JP2004046792A | ||||
| JP4166702A | ||||
| JP5152638A | ||||
| JP2004192241A | ||||
| JP2009086403A | ||||
| JP2004021528A | ||||
| JP2005213376A | ||||
| JP2006230876A | ||||
| JP2006340944A | ||||
| JP2006038710A | ||||
| JP2008203911A | ||||
| JP2009223875A | ||||
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Foreign References:
| WO2009139237A1 | ||||
| WO2009144964A1 | ||||
| WO2010070550A1 | ||||
| WO2010143528A1 | ||||
| US6447887 |
Attorney, Agent or Firm:
Kaede International Patent Office
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