Piezoelectric actuator and information storage apparatus

Piezoelectric actuator and information storage apparatus

There are disclosed a piezoelectric actuator which can obtain large displacement at low voltage, which is small-sized and lightweight, and whose manufacture cost is low, and a small-sized lightweight information storage apparatus in which the piezoelectric actuator is incorporated, and which is prov...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: UMEMIYA SHIGEYOSHI, HIDA MASAHARU, KUTAMI MICHINORI, MITA TSUYOSHI, KURIHARA KAZUAKI
Format: Patent
Sprache:eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Beschreibung
Zusammenfassung:There are disclosed a piezoelectric actuator which can obtain large displacement at low voltage, which is small-sized and lightweight, and whose manufacture cost is low, and a small-sized lightweight information storage apparatus in which the piezoelectric actuator is incorporated, and which is provided with a small inertia moment during head driving and a high recording density. A piezoelectric actuator 200 includes a center body 200a and two spiral arms 200b, and two arms 200b are entirely in rotation symmetry and nonlinear symmetry.