Abstract: An annular groove portion is integrally formed for preventing splashing of the lubricating oil by extending from a mount base (10) of the motor rotor to the motor shaft (6) to the metal bearing (5) and the radial ball bearing (20), allowing a spacer member (15) making contact with an inner ring (20a) of the radial ball bearing (20) to be attached inside the annular groove portion.

Abstract: A first cavity portion (103) for molding a first inner peripheral surface which is molded continuously from an opening of a bearing hole portion is provided in a first mold block (101). In a second mold block (102), a cavity C having an outside diameter (d2) greater than an inside diameter (d1) of the first peripheral surface and formed by the first cavity portion (103) and a second cavity portion at the time of mold closing is coaxially positioned, and a plurality of shape portions (104) for forming stepped portions are provided in such a manner as to extend toward the first mold block. A predetermined resin material in a molten state is introduced into the cavity to effect molding.

Abstract: An annular groove portion is integrally formed for preventing splashing of the lubricating oil by extending from a mount base (10) of the motor rotor to the motor shaft (6) to the metal bearing (5) and the radial ball bearing (20), allowing a spacer member (15) making contact with an inner ring (20a) of the radial ball bearing (20) to be attached inside the annular groove portion.

Abstract: A heat sink built-in type fan motor, which is mounted on an upper surface of an electronic component to cool the electronic component. The heat-sink built-in type fan motor includes a fan motor and a cooling plate to which the fan motor is fixed. The fan motor includes a motor portion having cooling blades and an attaching plate having leg portions formed in its peripheral portions to fix the motor portion to the cooling plate. The cooling plate has a hole portion substantially as large as the attaching plate 120, and recessed portions capable of accommodating at least the leg portion therein. The attaching plate is passed through the hole portion toward the rear surface side and is rotated so that the leg portions are accommodated in the recessed portions.

Abstract: This invention provides a compact, flat axial fan which is not limited by the shape of an incorporated rotor magnet and ensures a sufficiently large air flow and wind pressure, wherein the slide (under) piece of a mold that forms the under-molding portions of the vanes of the impeller of the axial fan is pulled out while being twisted (while performing a helical motion) in the direction of central axis of the base portion of the impeller, so that the mold can be formed simple to realize a multi-cavity mold, and the vanes can be formed into an ideal form by setting vane angles depending on different rotating peripheral velocities of the vanes, so that air can be supplied form the under-molding portions of the vanes to the vanes on the outer circumferential side during rotation of the impeller, a method of manufacturing an impeller for the axial fan, and a mold for manufacturing the impeller of the axial fan.

Abstract: An impeller includes a vane component integrally molded with a plurality of vanes having predetermined tilt angles that change continuously from a central portion of rotation, and a bottomed cylindrical component formed with a rotating shaft body, so that the vanes have an ideal shape with tilt angles that match the rotational peripheral velocity. For this purpose, the impeller of an axial fan serves as a rotor arranged to be rotatable with respect to a stator fixed to a main body of the axial fan. The impeller includes a bottomed cylindrical component formed by injection molding from a predetermined resin material such that a shaft body axially supported by a rotary bearing of the main body is formed at a central portion of rotation thereof, and a vane component formed by injection molding from a predetermined resin material such that a plurality of vanes are equidistantly formed thereon.

Abstract: This invention provides a compact, flat axial fan which is not limited by the shape of an incorporated rotor magnet and ensures a sufficiently large air flow and wind pressure, wherein the slide (under) piece of a mold that forms the under-molding portions of the vanes of the impeller of the axial fan is pulled out while being twisted (while performing a helical motion) in the direction of central axis of the base portion of the impeller, so that the mold can be formed simple to realize a multi-cavity mold, and the vanes can be formed into an ideal form by setting vane angles depending on different rotating peripheral velocities of the vanes, so that air can be supplied form the under-molding portions of the vanes to the vanes on the outer circumferential side during rotation of the impeller and a method of manufacturing an impeller for the axial fan.

Abstract: It is an object of the invention to provide an inexpensive and high-quality fluid bearing which improves the workability in assembly or coupling of a shaft and a rotator. In order to achieve this object, a fluid bearing according to the invention includes a rotating shaft, a bearing member for rotatably supporting the rotating shaft, and first and second fluid film formation mechanisms arranged at positions near a central portion of the rotating shaft along its longitudinal direction. The first fluid film formation mechanism forms a fluid film between the rotating shaft and the bearing member while the rotating shaft rotates in a first direction. The second fluid film formation mechanism forms a fluid film between the rotating shaft and the bearing member while the rotating shaft rotates in a second direction opposite to the first direction.