Drive unit, lens driving device, camera module, and camera-equipped device
AssigneeMitsumi Electric Co., Ltd.
InventorsShun SUZUKI, Masayoshi SUGAWARA
Life of this patent
Estimating the term…
Abstract
This drive unit comprises: an ultrasonic motor that converts the oscillation of a piezoelectric element to linear movement; a contact part that contacts a resonating part; a support part that is connected to a moveable part and supports the contact part; and an impelling part which is coupled to the contact part and which impels the contact part toward the resonating part so that the contact part moves in accordance with the resonance of the resonating part and transmits impelling force to the moveable part via the support part.
Claims10
A driving unit for generating a thrust to move a movable part in a predetermined direction, the driving unit comprising:
- an ultrasonic motor that includes a piezoelectric element and a resonant portion and is configured to convert a vibration of the piezoelectric element into a linear motion, the piezoelectric element generating the vibration, the resonant portion resonating with the vibration of the piezoelectric element;
- a contacting part that is in contact with the resonant portion;
- a supporting portion that is connected to the movable part and is configured to support the contacting part;
- and
- a biasing portion that is engaged with the contacting part and is configured to bias the contacting part toward the resonant portion such that the contacting part moves in accordance with resonance of the resonant portion and transmits the thrust to the movable part via the supporting portion.
Dependencies are inferred from the claim text.