Patent ID: 7411625
Filing Date: 2008-08-12
Classification: G02B,G03B

Abstract:
1. An auto focus lens system for a camera, comprising: a coil base, having a coil around the coil base and an accommodation hole; a stopper, disposed at one end and one side of the accommodation hole; a lens barrel, rotatably disposed inside the accommodation hole, the lens barrel having an inclined guide surface displaceably contacting the stopper, a permanent magnet around a surface of the lens barrel; and an elastic component, pressing against the lens barrel to constantly push the inclined guide surface against the stopper, wherein the lens barrel is translated axially through the accommodation hole by magnetic repulsion between the permanent magnet and the magnetic force of the coil when electric current flows through the coil, such that the lens barrel rotates about the axis of the accommodation hole responsive to the contact between the inclined guide surface and the stopper.