FLUID DYNAMIC PRESSURE BEARING FOR SMALL FLAT MOTOR, SMALL FLAT MOTOR, FAN MOTOR, AND FORCED AIR FEED TYPE AIR CELL

摘要

A small flat motor, comprising a stator (10) having a coil (10a) wound on a core (10b) and a rotor (11) having a magnet (11a) opposed to the core (10a) held by a yoke (11b), wherein the rotor (10) having an impeller (12) is supported by a fluid dynamic pressure bearing (13) having a fluid sump (13f) leading from the thrust receiving part (13a) of a bearing house (13b) to a fluid receiving groove (13e) formed around the outer periphery of a dynamic pressure sleeve (13d) fitted into the tube of the bearing house (13b).