Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.

Abstract: A fan device includes a rotor 20 and recesses 40 to be filled with claylike weights 70. The rotor 20 includes an impeller 23 and a shaft 10. The impeller 23 has a hub 21 and vanes 22. The recesses 40 are provided on a surface 212 that crosses an axial direction of the hub 21. Each recess 40 has a first area 41 and a second area 42. The first area 41 is circumferentially arranged and extends in a substantially circumferential direction. The second area 42 is connected to an outer circumferential side of the first area 41 and has a shorter length in the circumferential direction than the first area 41. The weight 70 is closely adhered to wall surfaces 421 and 422 formed along a radial direction in the second area 42 so as to prevent separation thereof.

Abstract: The invention relates to a special control for current-controlled inductors which allows inductance to be varied at a considerably faster rate than is the case in the prior art. The control presented in the invention can be employed for coil arrangements which carry at least one control winding and at least two working windings on a ferro or ferromagnetic core material. The accelerated change in inductance is achieved by means of a demagnetizing inverse voltage impulse which is generated by a special part of the circuit.

Abstract: The present invention provides an inner rotor electric motor, in which the stator core is divided into a plurality of stator segments extending in an axial direction which are accommodated in corresponding stator casing segments. The stator segments are preferably constructed in an identical manner; the corresponding stator casing segments are also preferably substantially identical to each other. Means of connection to mechanically connect the stator segments and the corresponding stator casing segments is provided as well as means of electrically coupling the phase windings.

Abstract: A hydrodynamic thrust bearing forming a part of a bearing system for a rotary bearing of spindle motors utilized to power hard disk drives. The thrust bearing includes at least one annular thrust plate and a counter bearing corresponding to the thrust plate. The thrust plate is firmly connected to a shaft rotatably supported by a radial bearing system. The shaft features an axial bore in the area of the thrust bearing, into which a fixing element is inserted. The fixing element is at least partially provided with a spherical surface. The element is inserted in such a way that the surface of the sphere projects slightly from the end of the shaft and rests on the counter bearing, at least when the motor is at a standstill. Therefore, when the motor is standing still or particularly during its start-up or shut-down phase, the spherical element (and not the bearing surface of the thrust plate) rests on the bearing surface of the cover plate.

Abstract: This invention provides a foil strain gauge having a plurality of sensing portions and a plurality of turnup tabs that are connected to each other through respective turnup portions, each turnup portion having an inner side defining a curve with a curvature that changes continuously and gradually.