Vibration actuator
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United States of America Patent
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May 25, 2010
Issued Date -
N/A
app pub date -
Jun 29, 2006
filing date -
Jun 29, 2005
priority date (Note) -
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Abstract
A vibration actuator having a simple small-sized structure capable of obtaining vibration enough to sense without use of suspension or the like is provided.Amplitude of a moving part is restrained by a magnetic gap formed by cup-shaped yokes which are formed to interpose a magnet, and the moving part is vibrated without collision of the moving part with an inner wall of a fixed part. Therefore, magnetic force exerted between the moving part and the fixed part is allowed to function as a suspension. Therefore, it is possible to solve a problem, that is, reduction in the amplitude caused from the suspension. In addition, an air damper structure that air in upper and lower space of the moving part is used as a damper is provided, so that it is possible to obtain a wide frequency band.
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