Piezoelectric element device, piezoelectric element apparatus, and load detection method

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12135251
APP PUB NO 20210404889A1
SERIAL NO

17363400

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Abstract

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A piezoelectric element device includes: a substrate including a plurality of vibrating portions having a first vibrating portion and a second vibrating portion; a piezoelectric element group in which a plurality of piezoelectric elements having a first piezoelectric element and a second piezoelectric element provided in the plurality of vibrating portions are coupled in parallel to each other; a plurality of load detectors having a first load detector including the first vibrating portion and the first piezoelectric element provided in the first vibrating portion and a second load detector including the second vibrating portion and the second piezoelectric element provided in the second vibrating portion; and a resin layer covering the piezoelectric element group. The first load detector resonates at a first resonance frequency, the second load detector resonates at a second resonance frequency, the first resonance frequency and the second resonance frequency are different from each other, the first resonance frequency changes in accordance with a load applied to the first load detectors via the resin layer, the second resonance frequency changes in accordance with a load applied to the second load detectors via the resin layer, and a first resonance frequency change range, which are changeable range of the first resonance frequency, and a second resonance frequency change range, which are changeable range of the second resonance frequency, do not overlap each other.

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Patent Owner(s)

Patent OwnerAddress
SEIKO EPSON CORPORATION4-1 NISHI-SHINJUKU 2-CHOME SHINJUKU-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kojima, Chikara Matsumoto, JP 84 164

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