Patent ID: 7639938
Filing Date: 2009-12-29
Classification: G03B

Abstract:
1. An auto-focusing lens of a 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 arranged on a first side of the magnet with a first winding wound thereon; and a second coil seat arranged on a second side opposite to the first side of the magnet with a second winding wound thereon, each winding establishing a magnetic field when an electric current is applied to the winding, the magnetic fields of the first and second windings interacting with the magnetic field of the permanent magnet to drive the lens unit into movement between its front focus point and its rear focus point; wherein each of the first and second coil seats includes a ring-shaped base wall, a flange extending from an inner circumference of the base wall, and two pins extending radially and outwardly from an outer-periphery of the base wall, the two pins of each base wall being perpendicular to each other, the first winding being wound around the flange of the first coil seat with two ends thereof wound around the two pins of the first coil seat, respectively, the second winding being wound around the flange of the second coil seat with two ends thereof wound around the two pins of the second coil seat, respectively.