Resonance drive actuator
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United States of America Patent
Stats
-
Oct 21, 2008
Grant Date -
Mar 30, 2006
app pub date -
Sep 22, 2005
filing date -
Sep 30, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A resonance drive actuator includes a casing; an electromagnetic drive section supported in the interior of the casing; a plunger to be reciprocatively driven at least in a rotational direction or in an axial direction by the electromagnetic drive section; an output shaft on which the plunger is fixed; and a spring which acts between the output shaft and the casing. The actuator resonantly drives a load connected to an end of the output shaft. The spring is a plate spring which integrally includes a casing inner-surface abutment portion fixedly abutting the inner surface of the casing, an output-shaft abutment portion fixedly abutting an outer surface of the output shaft, and a connection portion having the form of a strip and connecting the output-shaft abutment portion and the casing inner-surface abutment portion. The plate spring is fixed to both of the inner surface of the casing, and the output shaft.
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