Device

The integration of mechanical anchors in a piezoelectric multilayer element and reinforcement element limits excessive deformation, addressing damage risks and ensuring reliable operation and simplified installation in piezoelectric actuators.

JP7864742B2Active Publication Date: 2026-05-25TDK ELECTRONICS AG
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
TDK ELECTRONICS AG
Filing Date
2022-05-13
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing piezoelectric actuators are prone to damage from strong forces or deformations, leading to malfunction, and require additional mechanical protection in the installation environment.

Method used

A device with a piezoelectric multilayer element and a mechanical reinforcement element, featuring a movable working region with a restricted movement path limited by mechanical anchors, preventing excessive deformation and damage.

Benefits of technology

Prevents irreversible deformation and damage to the device, ensuring reliable operation and simplified installation by integrating mechanical anchors within the device design.

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Patent Text Reader

Abstract

The present invention relates to an apparatus, a piezoelectric multilayer element (1) having a top surface (2) and designed to change extent in a first direction (R1) in response to an applied voltage; a mechanical stiffening element (4) having an end region attached to the upper surface (2) of the piezoelectric multilayer element (1) and an action region movable relative to the piezoelectric multilayer element (1), the mechanical stiffening element (4) is designed such that the active area (6) is movable in a second direction (R2) perpendicular to the first direction (R1) when the extent of the piezoelectric multilayer element (1) changes, The second direction (R2) is parallel to the surface normal of the upper surface (2), The device comprises a mechanical anchor (8) that limits the path of movement (w) along which the working area (6) is movable towards the upper surface (2).
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