Patent ID: 8773762

Claim:
A lens barrel having an image-stabilizing insertable/removable optical element provided in a photographing optical system, said lens barrel comprising: an advancing/retracting member which is movable in an optical axis direction of said photographing optical system, wherein said advancing/retracting member is moved between a ready-to-photograph state and a lens barrel accommodated state in which no pictures are taken; an anti-shake frame supported by said advancing/retracting member, said anti-shake frame being movable relative to said advancing/retracting member in a plane orthogonal to said optical axis; an insertable/removable frame which holds said image-stabilizing insertable/removable optical element and is supported by said anti-shake frame to be rotatable about a rotational shaft that is parallel to said optical axis between an insertion position at which said image-stabilizing insertable/removable optical element is positioned on said optical axis and a removed position at which said image-stabilizing insertable/removable optical element is removed from said optical axis; an anti-shake drive mechanism which drives said anti-shake frame to perform an image-stabilizing operation in accordance with vibrations applied to said photographing optical system; and a removal drive mechanism which moves said insertable/removable frame between said insertion position and said removed position when said advancing/retracting member moves between said ready-to-photograph state and said lens barrel accommodated state, respectively, wherein said anti-shake drive mechanism comprises a first anti-shake drive actuator and a second anti-shake drive actuator, each of which includes a coil that is supported by one of said advancing/retracting member and said anti-shake frame and a permanent magnet that is supported by the other of said advancing/retracting member and said anti-shake frame, respectively, wherein said first anti-shake drive actuator and said second anti-shake drive actuator are both positioned on the opposite side of said insertion position of said image-stabilizing insertable/removable optical element from said removed position of said image-stabilizing insertable/removable optical element, and are respectively positioned on opposite sides of a straight line which connects a center point of said image-stabilizing insertable/removable optical element in said insertion position and said center point of said image-stabilizing insertable/removable optical element in said removed position, wherein said center point of said image-stabilizing insertable/removable optical element is positioned on said optical axis when in said insertion position, and wherein directions of driving forces respectively produced by said first anti-shake drive actuator and said second anti-shake drive actuator when said coils thereof are energized are at right angles to each other.