Patent ID: 8251595
Filing Date: 2012-08-28
Classification: G02B,G03B

Abstract:
1. A lens barrel, comprising: a plurality of lens groups each having at least one lens, the plurality of lens groups being moved between a collapsed state where at least one part of the plurality of lens groups is collapsed to store the plurality of lens groups and a photographic state where at least one part of the plurality of lens groups is disposed at an object side from a position in the collapsed state, and the plurality of lens groups having at least one retractable lens group; a plurality of lens retaining frames each configured to retain corresponding one of the plurality of lens groups and having at least one retractable lens retaining frame configured to retain the at least one retractable lens group; a movable cylinder configured to accommodate the plurality of lens retaining frames therein, the plurality of lens retaining frame retaining the plurality of lens groups to be positioned on a photographic optical axis in the photographic state and the at least one retractable lens retaining frame retaining the at least one retractable lens group to be retracted to a position outside an inner diameter position of the movable cylinder in the collapsed state; a positioning member provided inside the movable cylinder, the at least one retractable lens retaining frame retaining the at least one retractable lens to be positioned to a position on the photographic axis by allowing the at least one retractable lens retaining frame to abut on the positioning member; a lens retaining frame driving device configured to drive the plurality of lens retaining frames through the movable cylinder; a preliminary reception portion provided inside the movable cylinder and located on a path along which the retractable lens retaining frame moves from the collapsed state to the photographic state; and a preliminary abutment portion provided on the retractable lens retaining frame and configured to abut on the preliminary reception portion before the retractable lens retaining frame abuts on the positioning member during transition from the collapsed state to the photographic state.