Patent ID: 7145738

Claim:
A lens driving mechanism, comprising: a lens cylinder, wherein an inside of said lens cylinder is sufficient for containing a lens apparatus, and a flange perpendicularly extending from an outer surface of said lens cylinder; a conductor coil wound and fastened on the outer surface of said lens cylinder; an elastic component surrounding said lens cylinder; a mechanism cylinder, wherein an inside of said mechanism cylinder is sufficient for containing said lens cylinder and said elastic component; and a magnetic body disposed on an inner surface of said mechanism cylinder, wherein said magnetic body faces said conductor coil when said lens cylinder and said elastic component are placed into said mechanism cylinder, and then a current is conducted in said conductor coil for inducing an active force to push said lens cylinder, and at the same time, said flange and said magnetic body compress said elastic component from two ends of said elastic component separately for inciting a reactive force from said elastic component upon said lens cylinder, wherein a magnitude of said active force is controlled by adjusting a magnitude of said current for a state of equilibrium between said active force and said reactive force, whereby said lens cylinder can be shifted to a desired position.