| 摘要 |
A vibrator which constitutes a vibrating device of a vibration-type driving apparatus which comprises the vibrating device bonded to an electromechanical-energy-conversion element and comprising the vibrator having a projection portion, in which the vibrating device is constituted so that elliptic motion can arise at the projection portion by applying an alternating electric field to the electromechanical-energy-conversion element, and which moves by the elliptic motion a driven object being in contact with the projection portion in a direction intersecting with a width direction, wherein the vibrator comprises a base and the one/plural projection portions, the projection portion has at least two wall portions extending in a base out-of-plane direction and a contact portion having a contact surface with the driven object, and the contact surface connects the wall portions, and in boundary portions between the base and the wall portions, displacement directions are at a same position in a normal direction.
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