Patent ID: 8007175

Claim:
A hydrodynamic bearing device, comprising: a shaft; a sleeve that has a bearing hole in which the shaft is relatively rotatably inserted via a tiny gap; a cover member that is fixed to the sleeve with an adhesive so as to cover at least part of an end surface of the sleeve at one end in the axial direction, or at least part of a cylinder surface on the outer peripheral side of the sleeve; a communicating path that is formed between the cylinder surface on the outer peripheral side of the sleeve and the inner peripheral surface of the cover member and passes through in the axial direction from the end surface at one end toward the end surface at the other end in the axial direction, or is formed between the end surface at one end of the sleeve and the cover member and passes through from the bearing hole to the outer peripheral side of the sleeve in the radial direction; a lubricant that fills a space including at least the tiny gap and the communicating path; a hydrodynamic bearing portion that rotates and floats the shaft relative to the sleeve when the shaft and the sleeve rotate relatively to one another; and an adhesive inflow portion that is disposed on both sides in the circumferential direction of the communicating path and is where the adhesive, which fixes the sleeve and the cover member, flows in.