Patent ID: 8232698
Filing Date: 2012-07-31
Classification: H02K

Abstract:
1. A step motor having a stator unit which includes a bobbin receiving a coil that generates a magnetic force when external power is applied thereto, and a yoke attached to the bobbin, and having a rotor unit which is inserted into an inside of the stator and includes a magnet mounted to an outer circumference of a rotating shaft, thus generating a rotating force, and having a casing unit which is provided around an outer circumference of the stator unit to protect and cover the stator unit, wherein a coupling hole is formed in a central portion of each of opposite side surfaces of the casing unit, so that a bushing supporting the rotor unit is press-fitted or inserted into the coupling hole, and a ring member is press-fitted over an outer circumference of a portion of the bushing which protrudes out of the casing unit, so that the bushing is secured to the casing unit.