Patent ID: 7549806

Claim:
A retractable lens assembly, comprising: at least one optical lens; at least one variable-volume lens, including a lens film and an accommodation space wrapped by the lens film; a storage tank, stored with a transparent fluid; at least one communication tube, connecting the accommodation space and the storage tank, such that the transparent fluid flows between the accommodation space and the storage tank; and a fluid pump, selectively moving the transparent fluid from the storage tank to the accommodation space or moving the transparent fluid from the accommodation space to the storage tank; wherein when the transparent fluid is located in the accommodation space, the optical lens and the variable-volume lens are configured coaxially, thus a photographic optical system is formed, and when the transparent fluid is located in the storage tank, the variable-volume lens is flattened at least one frame, wherein the frame is fixed around the variable-volume lens, for limiting the variable-volume lens and the optical lens to be configured coaxially when the transparent fluid is located in the accommodation space; and at least one guide rail, wherein the guide rail limits the movement route of the frame, and determines a relative position of the variable-volume lens and the optical lens, when the transparent fluid flows between the accommodation space and the storage tank.