发明名称 |
DISPLACEMENT SENSOR, DISPLACEMENT DETECTING APPARATUS, AND OPERATION DEVICE |
摘要 |
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. |
申请公布号 |
EP2696163(A4) |
申请公布日期 |
2015.07.08 |
申请号 |
EP20120768338 |
申请日期 |
2012.04.06 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
ANDO MASAMICHI;KAWAMURA HIDEKI |
分类号 |
G01D5/18;G01B7/16;G01L1/16;H01L41/113 |
主分类号 |
G01D5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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