Patent ID: 8379330

Claim:
A lens frame radially-displacing mechanism of a retractable photographic lens, comprising: a plurality of optical elements which constitute a photographing optical system; a linearly advancing/retreating ring which is guided linearly in an optical axis direction of said photographing optical system and retreats in a direction toward an imaging plane when said retractable photographic lens moves from a ready-to-photograph state to a retracted state; a radially-displaceable support frame which is pivoted about a pivot extending parallel to said optical axis, supports a radially-displaceable optical element included in said plurality of optical elements, and rotates about said pivot between an on-axis position, at which said radially-displaceable optical element is positioned on said optical axis, and an off-axis displaced position, at which said radially-displaceable optical element is eccentrically positioned with respect to said optical axis, when said retractable photographic lens moves between said ready-to-photograph state and said retracted state, respectively; a rear support frame which supports a rear optical element positioned behind said radially-displaceable optical element when said retractable photographic lens is in said ready-to-photograph state; and a distance controller which controls approaching positions of said displaceable support frame and said rear support frame, wherein said distance controller comprises: an approaching-position limiter which limits relative movements of said displaceable support frame and said rear support frame to a predetermined distance between said approaching positions of said displaceable support frame and said rear support frame when said displaceable support frame moves rearward, and a distance extender which extends said predetermined distance between said approaching positions of said displaceable support frame and said rear support frame to an extended distance when said displaceable support frame rotates toward said off-axis displaced position.