Appeal No. 1998-2102
Application 08/826,039
The invention is related to a vibration actuator
comprising a vibration element which vibrates with a first
vibration mode (torsional vibration or longitudinal vibration)
and with a second vibration mode which is in a direction
different from the first vibration mode, and a relative
moving member which executes relative motion in accordance
with the vibration of the vibration element. A resonance
frequency of the vibration element in the first mode is higher
than the resonance frequency of the vibration element in the
second vibration mode so that the relative moving member is
driven in a stable state. The invention is further
illustrated by the following claim below.
16. A vibration actuator comprising:
a vibration element which vibrates with a first vibration
mode and with a second vibration mode which is in a direction
different from the first vibration mode; and
a relative moving member which executes relative motion
in accordance with the vibration of said vibration element,
in the first vibration mode, vibration of said vibration
element being made substantially along a direction coincident
with the direction of the relative motion, and in the second
vibration mode, vibration of said vibration element being made
substantially along a direction perpendicular to the vibration
direction in the first vibration mode, and a resonance
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