Patent ID: 7872683

Claim:
A lens barrel, comprising: a fixed frame having a fixed cylinder therein; a telescopic cylinder configured to be accommodated within the fixed cylinder; a plurality of lens groups configured to be retained in the telescopic cylinder; a lens driving device configured to drive the plurality of lens groups along a optical axis of the telescopic cylinder between a collapsed position in which at least one portion of the plurality of lens groups is stored in the fixed cylinder and an extended position in which the at least one portion of the plurality of lens groups is extended out of the fixed cylinder; and two retractable lens groups configured to be retracted into the telescopic cylinder when the telescopic cylinder is in the extended position and configured to be retracted out of the telescopic cylinder when the telescopic cylinder is in the collapsed position, wherein when the telescopic cylinder is in the collapsed position the two retractable lens groups are stored in a storage position in the fixed frame and overlap each other in the direction of the longitudinal optical axis of the telescopic cylinder.