Patent ID: 6288848
Filing Date: 2001-09-11
Classification: G02B,H02N

Abstract:
A lens barrel comprising:a vibration motor including an annular rotor and an annular stator provided coaxially with an optical axis of said lens barrel;a first rotary ring for rotating about the optical axis;a second rotary ring comprising first rotary members, for rotating about respective rotary shafts extending in a radial direction perpendicular to the optical axis, which are pinched by said rotor and said first rotary ring so as to effect revolution by receiving a rotational force from said rotor or said first rotary ring;a first pressurizing member for applying pressure to said stator for maintaining said rotor and said stator of said vibration motor in mutual pressure contact; anda second pressurizing member for applying pressure to said first rotary ring for maintaining said first rotary ring and said first rotary members in mutual pressure contact,wherein said first rotary ring, said rotor, and said first rotary members constitute a differential mechanism, and said first rotary members effect revolution about the optical axis by said differential mechanism and rotate said second rotary ring about the optical axis.