Abstract: The present invention relates an actuator including a housing, a drive unit installed in the housing and provided with a rotatable shaft, a bearing part installed in the housing to rotatably support the shaft at different positions, at least one bearing part included in the bearing part being fixed to the housing, and a gear unit accommodated in the housing, the gear unit being rotated about different axes rotational power transmitted thereto from the shaft.

Abstract: Disclosed herein is a step motor. The step motor includes a casing, a stator disposed in the casing, with a coil being wound around the stator, a rotor disposed in the stator, having a rotor shaft that is rotatably supported at both ends of the casing, and rotated by interaction with the stator, a rotary sensing unit provided in the casing to detect a rotation of the rotor, and a coil connector formed on an outer surface of the stator, with an end of the coil being connected to the coil connector.

Abstract: The invention relates to a vibration generator which is used in devices, such as mobile phones, requiring a vibration mode. More specifically, the invention relates to a horizontal vibration type vibration generator which includes a casing that is open on one surface thereof, a vibration part having a weight provided inside the casing, and a spring mounted inside the casing, and which produces horizontal vibration by using the phenomenon of resonance which occurs by causing oscillation in an electromagnetic force having the same frequency as the intrinsic vibration frequency of the spring, and which solves the problem of a reduction in the life span of the vibration generator due to mechanical friction as seen in existing mechanical vibration generators, and generates a large vibration force despite having a thin construction unachievable in a vertical moving type vibration generator. The invention also relates to a production method of the vibration generator.

Abstract: Disclosed herein is a bracket for a stepping motor. The bracket includes a plate-shaped welding section, through which a shaft passes, and a welding zone formed on one side of the welding section and having a smaller thickness than the welding section. The bracket has improved welding strength with respect to a housing of the stepping motor.

Abstract: Disclosed herein is a stepping motor. The stepping motor include a bracket including a fixing hole; a shaft supporter rotatably supporting one end of a shaft and fitted into the fixing hole; and a pressure supporter pressing and supporting the fixing hole and the shaft supporter while forming a plurality of pressure support points between the fixing hole and the shaft supporter. As such, the plurality of pressure support points is formed between the shaft supporter and the fixing hole, thereby enabling the shaft supporter to be stably press-fitted into and fixed to the fixing hole of the bracket.

Abstract: Disclosed herein is a PM type step motor used to move a camera or an optical pickup lens of media related equipment. The step motor has a stator unit including first and second stators which butt against and are coupled to each other and each have a bobbin and a yoke attached thereto. Terminal blocks of the first and second stators are spaced apart from each other when the first and second stators are coupled to each other, thus allowing an automatic winding operation using winding equipment to be easily performed. The step motor includes a bushing which has in a central portion thereof a through hole through which a rotating shaft passes and is a two-stage structure having a small outer diameter part and a large outer diameter part, thus allowing the stator unit, the rotating shaft and a casing unit to easily be arranged coaxially.

Abstract: A damper device for a refrigerator has a step motor used as the power source for rotating a baffle to open/close the cold air passage of the refrigerator in a more secured manner. The damper device for a refrigerator includes a frame installed in the cold air passage of the refrigerator and provided with an opening at the center thereof, a baffle rotatably installed on the frame to open/close the opening, a gear-equipped step motor installed on a surface of the frame and having a reduction gear and a motor integrally formed therein to transmit a rotation force necessary for opening/closing operation of the baffle, and a stopper adapted to mechanically limit the baffle in such a manner that it can be positioned in the desired opening position.