Abstract: In a motor unit as an example of the invention, a bearing assembly 5 is securely held on an inner circumferential portion of a hollow cylindrical section 11a of a first housing member 11 with an adhesive section 52 interposed therebetween. The adhesive section 52 includes: a first adhering subsection 52a in which an anaerobic adhesive is present and a second adhering subsection 52b in which an externally stimulated curing type adhesive cured by heating or ultraviolet irradiation is present. Inserting the bearing assembly 5 into the hollow cylindrical section 11a produces a temporarily fixed state by the first adhering subsection 52a, thereby enabling the external stimulated curing type adhesive to be stably cured in the temporarily fixed state.

Abstract: The present invention relates to a hydrodynamic bearing supporting a shaft and a sleeve so as to relatively rotate with respect to a rotation axis. In accordance with one example of the present invention, there is provided a hydrodynamic bearing in which a capillary seal portion is formed continuously in a bearing portion having a lubricating oil retained in a micro gap as a working fluid. The capillary seal portion is provided with a first capillary seal portion having a first radial gap, a dimension of the first radial gap being getting at least wider in accordance with increasing a distance from the bearing portion in the rotation axis, and a second capillary seal portion adjoining the first capillary seal portion and having a second radial gap, a dimension of the second radial gap being getting at least wider in accordance with increasing a distance from the bearing portion in the rotation axis.

Abstract: A conductive attenuation body is arranged close to at least a part of surface of a material to be magnetized which has far lower conductivity than that of the attenuation body. Furthermore, the change in magnetic flux during magnetization is rapidly intensified for a sufficiently short period of time and rapidly weakened. The magnetization flux is impressed in form of penetrating the attenuation body. With the rapid change in the magnetization flux over time, in the conductive attenuation body, an eddy current is generated in a direction canceling the magnetization flux and thus the magnetization field weakens. The magnetization waveform can be adjusted by adjusting a thickness, an arrangement shape or expanse of the attenuation body.

Abstract: A motor having a sleeve, a first board, a second board, a rotating part, a stator, a bracket and a bearing. The sleeve includes a sleeve main body having a cylindrical part into which a shaft is inserted, a first board supporting part having a first board supporting area extending in a radial direction of the cylindrical part, and a second supporting part having a second board supporting area that extends in a radial direction of the cylindrical part and is formed apart from the first board supporting area in an axial direction of the cylindrical part. The first board has a first through hole into which the sleeve main body and the second board supporting part are inserted and is fixed to the first board supporting area. The second board has a second through hole into which the sleeve main body is inserted and is fixed to the second board supporting area.

Abstract: In a spindle motor, in an upper portion of a stator bearing surrounding wall 32a of a bearing housing 32, a flange 32c projecting outward in the radial direction from the stator bearing surrounding wall 32a is provided, and a tapered face 32e obtained in such a manner that the outer diameter of the bearing housing 32 gradually decreases downward from the flange 32c is formed in the outer face of the stator bearing surrounding wall 32a. A rotor 2 has a yoke 23 facing the bearing housing 32 in the radial direction and the air-fluid boundary is formed in a fifth clearance 40 between the tapered face 32e and the inner face of the yoke 23. By the yoke 23 and the flange 32c which are fit to each other in a non-contact state, a detachment preventing structure is constructed.

Abstract: A dynamic pressure bearing device includes a dynamic pressure face of a shaft member, a dynamic pressure face of a bearing member, lubricating fluid filled in a bearing space of a dynamic pressure bearing portion including a gap between the dynamic pressure faces, a dynamic pressure generation means for pressing so that the lubricating fluid generates a dynamic pressure that supports the shaft member in a non-contact manner with the bearing member and in a rotatable manner relatively to the bearing member, and a sliding surface layer having abrasion resistance provided to at least one of the dynamic pressure face of the shaft member and the dynamic pressure face of the bearing member.

Abstract: A recording disk drive motor is disclosed which is employed in a recording disk drive that retains a removable recording disk that has a diameter of 30 mm or less, as well as a method of manufacturing a stator core used in the same. The core back of the stator core in the motor has an arc shaped inner circumferential surface therein that is offset from the center thereof. The stator core is produced from a laminated body having a stator core, a chuck frame that is integral with and surrounds the stator core, and connector arms that connect the stator core and the chuck frame and integral therewith. After the windings are wound around the stator teeth, the stator core is cut from each connecting arm and the stator core is removed from the chuck frame.

Abstract: In the present invention, to reduce the noise of a spindle motor, a bush member is interposed between a base plate and an FDB unit. The base plate is a base of the spindle motor and of which a case of a hard disk drive is consisted. The FDB unit is a bearing unit which has a shaft, a sleeve having an inner peripheral surface opposed to an inner peripheral surface of the shaft, and a bearing housing formed integrally with the sleeve.

Abstract: It is the object of this invention to provide a gas dynamic pressure bearing system with high rigidity and reliability. The unit is configured such that a thrust bearing sends lubricating gas under pressure in a radial direction, and a radial bearing sends the gas toward the thrust bearing, thereby increasing the bearing rigidity. In addition, one or more dynamic pressure generating grooves which constitute the thrust bearing are extended and connected to a particle catching holes formed in a shaft. With those configurations, the dust particles are trapped in the catching hole and are kept away from the bearing gaps.

Abstract: A DC motor drive circuit includes a position detector for producing an output signal that corresponds to a rotational position of the rotor, a current controller for controlling current supply to the winding in accordance with the output signal of the position detector, and a phase advancing portion for the current between the position detecting portion and the current controller, so that the timing for supplying current to the winding is advanced and efficiency of converting the current supplied to the winding into a motor torque is improved.

Abstract: Game apparatus that enables players themselves to bodily sense a feeling of reality and lively motion, and that enables satisfying curiosity regarding mechanical manipulations. The game apparatus is composed of: a holding section (6) for holding a plurality of grab articles (7); a ride apparatus (10) for players (Y) to board, adapted to be shiftable and/or rotatable; and a fetching device (25) attached onto the ride apparatus (10), for fetching grab articles (7) from the holding section (6) by player (Y) manipulations. By actions that manipulate the fetching device (25), a player (Y) can satisfy curiosity regarding mechanical manipulations, and can enjoy an amusement brimming with appeal. By boarding and traveling with the ride apparatus (10), the players (Y) themselves can bodily sense a feeling of reality and lively motion.

Abstract: Chiropractic aids for releasing tension in the muscle groups that act to form anteroposterior curvature in the lumbosacral region. Usable with wedge-shaped pads and a rectangular pillow, the principal aid is a convertible triangular pillow having two right-triangular members detachably hinged along their right-angle corners by a first surface fastener. A second surface fastener is provided on each right-triangular cylindrical member edgewise opposite the right-angle corner. Thus the surfaces defined by the counterpart short sides of the right-triangular cylindrical members can be detachably fastened together by the fasteners.

Abstract: A method for cleaning a plurality of drainpipes installed in a movable equipment by causing a flow of a cleaning solution through the drainpipes includes the steps of connecting provisional pipes to the plurality of drainpipes, feeding a cleaning solution into the provisional pipes and the drainpipes, and applying negative pressure suction force to the provisional pipes and the drainpipes to cause a flow of the cleaning solution in the opposite direction to a drain direction in normal use, to thereby clean the drainpipes.