Patent ID: 7634189

Claim:
A two-step auto-focusing camera comprising: a lens unit; a permanent magnet being fixedly mounted around the lens unit to move with the lens unit; a first coil seat with a first coil wound thereon mounted around the lens unit and being arranged on a side of the permanent magnet; a second coil seat with a second coil wound thereon mounted around the lens unit and being arranged on an opposite side of the permanent magnet, and when electric currents are supplied to the first and second coils, the first and second coil seats have magnetic fields interacting with a magnetic field of the permanent magnet to generate forces to move the lens unit, the force generated by one of the first and second coil seats and the permanent magnet being an attractive force, the force generated by the other of the first and second coil seats and the magnet being a repulsive force; and a flange extending outwardly from an outer periphery of each coil seat at an end near the permanent magnet, with the permanent magnet being limited to move between the flanges of the first and second coil seats during movement of the lens unit, the permanent magnet abutting against one of the flanges of the first and second coil seats when the lens unit reaches its focus position.