Drive mechanism employing electromechanical transducer and appar

Details Drive mechanism employing electromechanical transducer and appar Drive mechanism employing electromechanical transducer and appar

1998-07-23

2000-01-18

Epps, Georgia

Optical: systems and elements

Lens

With support

359814, G02B 702

Patent

active

060162317

ABSTRACT:
A device, employing a piezoelectric element, drives an object such as a lens in a camera, in which it is possible to increase a speed of a moving part to drive the object without increasing a maximum value of pulse voltage inputted to the element. The device has the element one end of which is fixed to a base seat; a rod one end of which is fixed to the other end of the element; a moving part which is frictionally mounted on the rod; and a resonant induction part which is connected to the other end of the rod. The resonant induction part has a spring part one end of which is connected to the rod, and a weight part which is connected to the other end of the spring part. The rod resonates under an effect of the resonant induction part so as to increase the amplitude of the vibrating rod when the pulse voltage applies to the element; thus increasing the speed of the moving part relative to the base seat.

REFERENCES:
patent: 5587846 (1996-12-01), Miyano et al.
patent: 5589723 (1996-12-01), Yoshida et al.
patent: 5675444 (1997-10-01), Ueyama
patent: 5917267 (1999-06-01), Miyazawa et al.

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