| 摘要 |
A piezoelectric device comprising a continuous piezoelectric element ( 10 ) extending alternately back and forth to form a plurality of parallel, straight portions ( 14 ) arranged in a stack with intermediate linkage portions ( 15 ) at alternate ends the straight portions ( 14 ). Each straight portion ( 14 ) is constructed and arranged with electrodes ( 12, 13 ) to bend, on activation, in the stacking direction in which the straight portions ( 14 ) are stacked with opposite curvature in two halves ( 16, 17 ) of the straight portion ( 14 ) to create displacement between the ends of the straight portion ( 14 ) in the stacking direction adding in series through the stack. The continuous nature of the piezoelectric element ( 10 ) eases manufacture. Devices with two types of construction are disclosed. Firstly, the continuous piezoelectric element ( 10 ) may have a bender construction such as a bimorph bender construction. Secondly, the continuous piezoelectric element ( 101 ) may be a sheet of piezoelectric material having overlapping slits ( 102 ) extending from alternate sides to form the straight portions ( 103 ) between the slits ( 102 ), with opposed electrodes ( 105 ) arranged on each major surface of the sheet in pairs separated across, and extending along, the straight portions ( 103 ).
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