Patent ID: 7039309

Claim:
A drive apparatus for a camera lens comprising: a camera lens mount having a guide block affixed thereto; a telescopic lens having an external thread connected thereto; a stepper motor having a coil stator with multiple pole teeth therein, said stepper motor having a magnetic ring rotor positioned in said coil stator so as to be in driving relation therewith, said coil stator received within said camera lens mount, said magnetic ring rotor having a spindle affixed to an interior wall thereof, said spindle having an internal thread threadedly engaged with said external thread of said telescopic lens, said telescopic lens having a travel limiting slot formed longitudinally along an exterior surface thereof, said travel limiting slot coupled with said guide block such that said telescopic lens is in non-rotatable relation to said camera lens mount, said magnetic ring rotor being rotatable in reaction to said coil stator, said camera lens mount having a thrust ring at an end of said magnetic ring motor so as to limit an axial movement of said magnetic ring rotor.