Retracting mechanism for the lens tube of such as a digital camera maintains precision positioning of the optical elements

摘要

A unit such as a digital camera has a lens tube that is coupled to a retracting mechanism. This has a non rotational element (21) relative to an axis (Z1) with a contact surface (21a).A frame with a holder (6) moves along the axis and carries the optical elements. Mounted on the holder is a torsion spring (40) that holds the parts in direct contact when the drive operates to provide the retraction of the tube.