Vibration wave linear motor
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United States of America Patent
Stats
-
Nov 11, 2008
Grant Date -
Jun 5, 2008
app pub date -
Jan 30, 2008
filing date -
Aug 6, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a vibration wave linear motor, a coupled driving contacting parts are respectively provided on the top and the bottom of a vibrator unit, and 2 upper and lower guide shafts which contact concave parts of the coupled driving contacting parts are supported by erecting parts of a supporting part. The lower guide shaft is pressed upward by spiral springs, so that the two guide shafts press and sandwich the vibrator. Alternating current voltages having different phases are applied to the vibrator unit, whereby the vibrator unit generates a vibration wave to generate elliptical rotation vibrations in the driving contacting parts. As a result, the vibrator, and the two guide shafts and the supporting part make a relative move in the shaft direction. Either the guide shafts or the vibrator is fixed, and the other is linked to an object to be driven.
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