Patent ID: 7292396

Claim:
A lens device comprising: a motor having a stator for creating a magnetic field according to energization and a hollow rotor disposed inside said stator, said hollow rotor rotating in said magnetic field created by said stator, a rotary barrel fixed on an inner periphery of said rotor; a first lens holder for holding a first lens; a first interconnection mechanism for connecting said first lens holder and said rotary barrel to move said first lens holder along an optical axis in cooperation with rotation of said rotary barrel, said optical axis having a direction; a second lens holder, located at an object-side from said first lens holder, for holding a second lens; and a second interconnection mechanism for connecting said second lens holder and said rotary barrel to move said second lens holder along said optical axis in cooperation with rotation of said rotary barrel, wherein said second interconnection mechanism is constituted of a cam mechanism comprising a cam portion, having a sloped surface inclined along a rotational direction of said rotary barrel, and a cam follower contacting said sloped surface of said cam portion, either of said second lens holder or said rotary barrel is provided with said cam portion and the other is provided with said cam follower, said second lens holder is moved according to shifting of a contact position between said sloped surface of said cam portion and said cam follower in cooperation with rotation of said rotary barrel, and said cam follower protrudes along said direction of said optical axis.