Patent ID: 8760038

Claim:
A vibration actuator, comprising: a roller having an outer cylindrical surface; a vibrating element having a projection, the projection including a chamfered contact portion that is in contact with the outer cylindrical surface of the roller; a vibrator for vibrating the vibrating element; a pressing device for pressing the roller against the vibrating element; and a lubricator disposed close to the chamfered contact portion and in contact with the outer cylindrical surface of the roller, wherein the outer cylindrical surface of the roller is in contact with the lubricator and the chamfered contact portion at different and separate positions, wherein the lubricator is provided by a flexible or elastic porous resin member impregnated with lubricant, wherein the pressing device urges the outer cylindrical surface of the roller to deform the porous resin member so that a film of lubricant is produced between the outer cylindrical surface of the roller and the chamfered contact portion of the projection.