Patent ID: 8284289

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 plurality of lens retaining frames configured to retain the plurality of lens groups; and a lens driving device configured to drive the plurality of lens retaining frames to move the plurality of lens groups along a photographing optical axis between a collapsed state in which at least one portion of the plurality of lens groups is stored in the fixed cylinder and a photographing state in which the at least one portion of the plurality of lens groups is extended out of the fixed cylinder, wherein the plurality of lens groups includes at least one retractable lens group configured to be retracted into the telescopic cylinder when the telescopic cylinder is in the photographing state and configured to be retracted out of the telescopic cylinder when the telescopic cylinder is in the collapsed state, wherein the plurality of lens retaining frames has a retractable lens retaining frame configured to retain the at least one retractable lens group; wherein when the telescopic cylinder is in the collapsed state, the at least one retractable lens group is stored in a storage position in the fixed frame; wherein the lens driving device includes a retractable lens retaining frame driving device configured to drive the retractable lens retaining frame to move the at least one retractable lens group along the optical axis back and forth and configured to retract the at least one retractable lens group out of the photographing optical axis, and wherein when the telescopic cylinder is in the collapsed state, the retractable lens retaining frame driving device is positioned anterior to the at least one retractable lens group in the direction of the optical axis.