Piezo actuator
AssigneeRobert Bosch GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
A piezoelectric actuator has a multilayered structure of piezoelectric layers with inner electrodes interspersed between them and a contacting of the inner electrodes on alternating sides by means of outer electrodes that can supply an electrical voltage. The respective outer electrodes are attached in a net-like, mesh-like, or screen-like fashion and contacts the respective inner electrodes at least at points in the corner region of the piezoelectric actuator, wherein the outer electrode is guided around the respective corner in a predetermined region extends in the direction of the multilayered structure of piezoelectric layers, and is provided with a terminal there.
Claims20
1-8. (canceled)
In a piezoelectric actuator including
- a multilayered structure of piezoelectric layers with inner electrodes (2, 3) interspersed between them,
- a contacting of the inner electrodes (2, 3) on alternating sides with outer electrodes (4) that can supply an electrical voltage,
- the respective outer electrode (4) being attached in a net-like, mesh-like, or screen-like fashion and contacting the respective inner electrodes (2, 3) at least at points, the improvement wherein
- the contacting of the inner electrodes (2, 3) is provided in the corner region of the piezoelectric actuator (1), and
- the net-like, mesh-like, or screen-like outer electrode (4) being guided around the respective corner in a predetermined region, and contacting the respective inner electrodes (2, 3) at least in parts.
The piezoelectric actuator according to claim 1 1, wherein
- the respective net-like, mesh-like, or screen-like outer electrode (4) and/or the terminal (6) is/are made of Invar.
Dependencies are inferred from the claim text.