Patent ID: 6919995
Filing Date: 2005-07-19
Classification: G02B

Abstract:
1. A light shielding structure of a retractable lens barrel including a lens system, a position of said lens system changing between a ready-to-photograph position and a retracted position, said light shielding structure comprising: a lens frame to which a lens group of said lens system is fixed, a position of said lens group in an optical axis direction being adjusted during assembly; at least one movable annular member into which said lens frame is screw-engaged, said movable annular member being movable along said optical axis; a light shield member which prevents harmful light rays from entering said lens system, said light shield member being supported by said movable annular member to be movable along said optical axis relative to said movable annular member, while restricting a rearward movement limit of said light shield member relative to said movable annular member; and a biasing member which is positioned between said light shield member and said lens frame in a compressed fashion to bias said light shield member toward the rearward movement limit thereof relative to said movable annular member.