Piezoelectric drive device
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United States of America Patent
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Jan 19, 2021
Grant Date -
Mar 15, 2018
app pub date -
Sep 5, 2017
filing date -
Sep 9, 2016
priority date (Note) -
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Abstract
A piezoelectric drive device including: laminated piezoelectric element including a first end face and a second end face opposed to the first end face; a weight member attached to the first end face; and a shaft attached to the second end face, in which a moving member, engaged to the shaft movable in an axial direction, is moved by activating the laminated piezoelectric element. Inside the laminated piezoelectric element, a first internal electrode and a second internal electrode, respectively having a plane surface approximately perpendicular to the first end face and the second end face, are laminated in Y axial direction, approximately perpendicular to the first internal electrode and the second internal electrode with a piezoelectric layer in-between. The piezoelectric drive device, in which the laminated piezoelectric element is difficult to bend, even when the load is applied to the shaft from a lateral direction, is provided.
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