Patent ID: 7729066

Claim:
A lens unit, comprising: a moveable section comprising a lens barrel, a lens received in the lens barrel and a magnet fixedly mounted around an outer periphery of the lens barrel, the moveable section being configured to have a telescopic movement along an optical axis of the lens; and an elastic element comprising an attachment portion connecting with the moveable section, a holding portion for connecting with a stationary part and holding the movable section, and at least one elastic rib interconnecting the attachment portion and the holding portion and being elastically deformed during the telescopic movement of the moveable section; wherein the at least one elastic rib of the elastic element is configured to restrain a movement of the moveable section when the movable section is telescoped, whereby the moveable section can stop at a focal position when an elastic force generated by the deformation of the at least one elastic rib is equal and opposite to a force for causing the moveable section to have the telescopic movement.