| CPC H02N 2/103 (2013.01) [H02N 2/001 (2013.01); H02N 2/12 (2013.01)] | 20 Claims |
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1. An ultrasonic motor comprising:
a stator including a plate-shaped vibrator having first and second main surfaces that oppose each other, and a plurality of piezoelectric elements disposed on the first main surface of the plate-shaped vibrator;
a rotor in direct or indirect contact with the second main surface of the plate-shaped vibrator; and
a wiring member including an insulating substrate disposed on the first main surface of the plate-shaped vibrator, and first wiring and second wiring disposed on the insulating substrate,
wherein the plurality of piezoelectric elements is dispersedly arranged along a circumferential direction of a traveling wave that circulates an axial direction of the plate-shaped vibrator so that the traveling wave is generated by the plate-shaped vibrator,
wherein the plurality of the piezoelectric elements includes a first piezoelectric element, a second piezoelectric element, a third piezoelectric element, and a fourth piezoelectric element, and when viewed from the axial direction, the first and third piezoelectric elements face each other across a center of the traveling wave, and the second and fourth piezoelectric elements face each other across the center of the traveling wave,
wherein the first wiring of the wiring member is electrically connected to the first and third piezoelectric elements, and the second wiring is electrically connected to the second and fourth piezoelectric elements, and
wherein, when viewed from the axial direction, the second wiring passes over the third piezoelectric element from the second piezoelectric element side and extends toward the fourth piezoelectric element side.
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