A horizontal linear vibration motor for securing the straightness of a coil spring and preventing a driving unit, such as a mass body, from axially rotating around the axis of a shaft within a housing due to the rotational property of the coil spring by providing a coil and a magnet for generating a force that enables the reciprocating motion of the driving unit including the mass body and an anti-rotation member provided in the driving unit to slide and come into contact with the housing.

A horizontal linear vibration motor for securing the straightness of a coil spring and preventing a driving unit, such as a mass body, from axially rotating around the axis of a shaft within a housing due to the rotational property of the coil spring by providing a coil and a magnet for generating a force that enables the reciprocating motion of the driving unit including the mass body and an anti-rotation member provided in the driving unit to slide and come into contact with the housing.

Provided is a control apparatus of a vibration-type actuator for generating an elliptical motion of contact portions by a common alternating current including a frequency determining unit for setting a frequency of the alternating current. The frequency determining unit sets the frequency of the alternating current for changing an ellipticity of the elliptical motion, within a frequency range such that ellipticity changing frequency ranges set for the vibrators are overlapped, and the ellipticity changing frequency ranges are set for the vibrators as frequency ranges between an upper limit and a lower limit, such that the lower limit is a maximum resonant frequency at a time of changing the ellipticity, and the upper limit is larger than the lower limit and is a maximum frequency for the relative movement of the driving member.

A haptic generator device according to an embodiment of the present disclosure can include a stator, a rotor, a magnet, and a coil. The stator can include a stopper. The rotor can rotate in relation to the stator and can have a protrusion. The magnet can be provided on one of the rotor and the stator, where multiple magnets can be provided. The coil can be provided on the other of the rotor and the stator and can interact with the magnet to generate a rotational force. The rotor can perform an oscillating rotational movement within a 360-degree range. While the rotor is rotating in a first direction, a rotational movement of the rotor can be forcibly halted or can be rotated in a second direction opposite to the first direction to generate a rotational inertia vibration before the protrusion of the rotor collides with the stopper of the stator.

A linear vibration motor has a cover body made from a magnetic material having a planar inner surface (supporting face); a movable element that comprises a magnet and a weight, and that vibrates in the axial direction along the inner surface; an elastic member elastically repelling the vibration of the movable element; and a coil, secured in relation to the cover body, and wherein a winding part that is perpendicular, in respect to the axial direction, to a gap between the movable element and the cover body, where supporting portions for supporting the movable element through the elastic member are provided on both axial-direction end portions on the cover body.

A linear vibration motor has a cover body made from a magnetic material having a planar inner surface (supporting face); a movable element that comprises a magnet and a weight, and that vibrates in the axial direction along the inner surface; an elastic member elastically repelling the vibration of the movable element; and a coil, secured in relation to the cover body, and wherein a winding part that is perpendicular, in respect to the axial direction, to a gap between the movable element and the cover body, where supporting portions for supporting the movable element through the elastic member are provided on both axial-direction end portions on the cover body.

A VCM is disclosed, the VCM including a rotor including a bobbin arranged at an upper surface of a base formed with an opening, and a driving coil wound on the bobbin, a stator including a driving magnet opposite to the driving coil, and a yoke secured by the driving magnet at an inner surface of a lateral plate, and a tilting unit including a tilt magnet arranged at an outer surface of the lateral plate, a housing fixing the tilt magnet, and a tilt coil unit opposite to the tilt magnet.

Electromagnetic actuators are provided, which generate bidirectional linear force output without magnetic bias from current or permanent magnets. Systems and methods based on the electromagnetic actuators are also provided. In particular, an electromagnetic actuator having a shaft, an axial bearing, coil assembly, top and bottom stationary flux returns, and top and bottom magnetic flux sensors to measure flux crossing the respective top and bottom axial air gaps.

Electromagnetic actuators are provided, which generate bidirectional linear force output without magnetic bias from current or permanent magnets. Systems and methods based on the electromagnetic actuators are also provided. In particular, an electromagnetic actuator having a shaft, an axial bearing, coil assembly, top and bottom stationary flux returns, and top and bottom magnetic flux sensors to measure flux crossing the respective top and bottom axial air gaps.

Provided is an electric motor combined with a power generator comprising: a fixed coil plate in which separate coil bodies are uniformly arranged; and a reciprocating magnet plate in which separate magnets are uniformly arranged. The installation location of the electric motor combined with a power generator is not restricted by linearly or rotationally moving equipment. In addition, the electric motor combined with a power generator enables coils and magnets to be regularly and closely arranged in the coil plate and the magnet plate, thereby minimizing loss of the locomotive force. Furthermore, when performing a reciprocating movement to which an inertial force is added, the electric motor combined with a power generator enables electric current to be instantly broken and converted and supplied by sensing of sensors, while implementing a strong reciprocating movement due to an increase of speed by means of the compression and repulsive force of a spring.