Importance

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Abstract

A vibration-type actuator includes a vibration body including an electric-mechanical energy conversion element with a lead content of 1000 ppm or less, and an elastic body having a plate portion and protrusions protruding in a direction intersecting with a main surface of the plate portion, and a contact body in contact with the protrusions. The vibration body and the contact body are relatively moved by vibration of the vibration body. The vibration-type actuator further comprises a pressure member pressing the vibration body against the contact body and a foamed member arranged between the pressure member and the vibration body. The foamed member contains, as a main skeleton, a siloxane bond including silicon and oxygen, and an average equivalent circle diameter of bubbles contained in the foamed member is greater than 120 μm.

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First Claim