Patent ID: 7405892

Claim:
A lens module, comprising: a base having a bottom, the bottom having a plurality of bumps; a sleeve disposed on the bumps rotatably, and having a plurality of step portions, wherein each of the step portions comprises a plurality of steps, and a difference of height is disposed between each two steps, and each of the bumps is in contact with one of the steps of the corresponding step portion; a lens disposed in the sleeve; a magnetic permeable column disposed in the base and beside the sleeve, wherein two ends of the magnetic permeable column have a distance away from the bottom respectively; a coil supporter having two opposite holes, the magnetic permeable column being inserted into the holes, wherein the coil supporter is coupled to the sleeve; a coil disposed between the holes, the magnetic permeable column being inserted into the coil; and a magnet set disposed beside the coil, wherein when a current is passed through the coil, the electromagnetic force produced between the coil and the magnet set moves the coil along the magnetic permeable column to push the coil supporter and rotate the sleeve accordingly.