Vibration actuator, lens barrel, camera system and vibrating...

Details Vibration actuator, lens barrel, camera system and vibrating... Vibration actuator, lens barrel, camera system and vibrating...

2007-03-09

2011-10-11

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

08035275

ABSTRACT:
A vibration actuator by which stable drive can be obtained, a lens barrel, a camera system and a vibrating element are provided. In first vibration mode and second vibration mode, vibrating elements of the vibration actuator can vibrate. Resonance frequency of the second vibration mode, which is different from the first vibration mode used for driving a relatively moving member, is prevented from being same as the frequency of the higher harmonic of a driving signal.

REFERENCES:
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patent: 4893045 (1990-01-01), Honda
patent: 5543879 (1996-08-01), Takagi
patent: 5777445 (1998-07-01), Motegi
patent: 6359369 (2002-03-01), Iino et al.
patent: A-07-115781 (1995-05-01), None
patent: A-09-163767 (1997-06-01), None
patent: A-2000-278970 (2000-10-01), None
patent: A-2004-187465 (2004-07-01), None

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