Patent ID: 8026641
Filing Date: 2011-09-27
Classification: H02K

Abstract:
1. A step actuator apparatus comprising: a step actuator including a housing, a stator installed in the housing, a rotor rotating by a reaction with the stator, and a screw member coupled to the rotor and moving linearly according to rotation of the rotor; and a circuit board module including a circuit board electrically connected to the step actuator and a case for supporting the circuit board, wherein the housing has a first opening, and the case includes a plurality of hooks inserted into the first opening, wherein the hooks include a first hook for restraining movement of the housing in a first direction, a second hook for restraining movement of the housing in a second direction opposite to the first direction, a third hook for preventing the housing from rotating clockwise and a fourth hook for preventing the housing from rotating counterclockwise.