Abstract: To reduce the length of the lens barrel, a vibration actuator has a vibrating element, a rotor, a pressing portion, a rotor holder that restricts a position of the rotor in the thrust and radial direction, and a bearing of which a rotation axis is coaxial with the axis of the vibrating element. The rotor holder includes an outer flange to receive the pressure force from the rotor portion, and an inner flange to serve as a first track face of the bearing.

Abstract: To reduce the length of the lens barrel, a vibration actuator has a vibrating element, a rotor, a pressing portion, a rotor holder that restricts a position of the rotor in the thrust and radial direction, and a bearing of which a rotation axis is coaxial with the axis of the vibrating element. The rotor holder includes an outer flange to receive the pressure force from the rotor portion, and an inner flange to serve as a first track face of the bearing.

Abstract: A vibration actuator comprising: a vibration portion which contacts a relative movement portion, and produces necessary vibration for a relative movement of the relative movement portion; a first member provided to hold the relative movement portion between the first member and the vibration portion, and moves relative to the vibration portion in response to movement of the relative movement portion with respect to the vibration portion; a second member which faces the first member via a rolling member, and supports the first member so that the first member is movable relative to the vibration portion; and a pressing member which generate a pressing force between the second member and the vibration portion so that the vibration portion and the relative movement portion are in contact with each othercome in contact with each other; and wherein the first member comprises a plastic substance.

Abstract: A driving device for an optical device comprising: an operation ring 3 to which a driving force from an operation member 4 is transmitted; a driving ring 9 to which a driving force from an actuator 20 is transmitted; an output ring 5 which transmits a driving force to an optical component 8a; and a planetary roller 6 which slides on one end face 3b of said operation ring 3 and one end face 9b of said driving ring 9, said planetary roller 6 being rotatably attached to said output ring 5 so as to selectively transmit the driving force from any one of said operation ring 3 and said driving ring 9 to said output ring 5. A sliding face 3b of said operation ring 3 with said planetary roller 6 consists of a lower friction member than the operation ring body.

Abstract: A vibration actuator comprising: a vibration portion which contacts a relative movement portion, and produces necessary vibration for a relative movement of the relative movement portion; a first member provided to hold the relative movement portion between the first member and the vibration portion, and moves relative to the vibration portion in response to movement of the relative movement portion with respect to the vibration portion; a second member which faces the first member via a rolling member, and supports the first member so that the first member is movable relative to the vibration portion; and a pressing member which generate a pressing force between the second member and the vibration portion so that the vibration portion and the relative movement portion are in contact with each othercome in contact with each other; and wherein the first member comprises a plastic substance.

Abstract: A driving device for an optical device comprising: an operation ring 3 to which a driving force from an operation member 4 is transmitted; a driving ring 9 to which a driving force from an actuator 20 is transmitted; an output ring 5 which transmits a driving force to an optical component 8a; and a planetary roller 6 which slides on one end face 3b of said operation ring 3 and one end face 9b of said driving ring 9, said planetary roller 6 being rotatably attached to said output ring 5 so as to selectively transmit the driving force from any one of said operation ring 3 and said driving ring 9 to said output ring 5. A sliding face 3b of said operation ring 3 with said planetary roller 6 consists of a lower friction member than the operation ring body.