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US 9,263,983 B2Granted
Vibration generating apparatus
AssigneeNidec Seimitsu Corporation
InventorMasahiko Miyazaki
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AssigneeNidec Seimitsu Corporation
InventorMasahiko Miyazaki
Estimating the term…
A vibration generating apparatus with high yield, low cost, and can exhibit vibration tactile haptic effects even with variation in the natural frequency of a mechanical vibrator, including a damping system having a damping ratio ζ<1 to support a mechanical vibrator to a fastening part, and a magnetizing unit generating a dynamic magnetic field to vibrate the mechanical vibrator by non-contact, the mechanical vibrator generating a beat vibration by making the frequency of a drive voltage applied to the magnetizing unit, from a drive start or middle of drive, to be a non-resonant frequency out of a damped natural frequency of the mechanical vibrator, wherein the apparatus comprises a forced vibration control unit controlling to stop application of the drive voltage, in a beat wave defining an amplitude of the beat vibration, at a second valley part after a first peak part from the side of the drive start.
A vibration generating apparatus including a damping system having a damping ratio ζ<1 to support a mechanical vibrator with respect to a fastening part through a spring element, and a magnetizing means generating a dynamic magnetic field to vibrate said mechanical vibrator without contact, said mechanical vibrator generating a beat vibration by making the frequency of a drive voltage applied to said magnetizing means, from a drive start or middle of drive, to be a non-resonant frequency out of a damped natural frequency of said mechanical vibrator, wherein:
Dependencies are inferred from the claim text.