Patent ID: 7350975

Claim:
A hydrodynamic bearing device comprising: a shaft; a sleeve including a bearing hole with an open end that opens and a close end that is closed, the shaft being inserted into the bearing hole for freely rotating with a predetermined gap in between; a cover attached to the sleeve and covering an end face on the open end side of the sleeve in an orientation of including a space; a radial dynamic pressure generating groove formed on at least one of an outer peripheral surface of the shaft and an inner peripheral surface of the sleeve where the shaft and the sleeve face each other, the dynamic pressure generating groove supporting the shaft with respect to the sleeve in a relatively rotatable fashion in a radial direction in a non-contacting manner; a circular communication path formed in the sleeve, for communicating a space region on the close end face of the sleeve and a space region on the open end side between the cover and the end face on the open end side of the sleeve; and a working fluid being filled into a space in the sleeve including at least one part of the space region on the open end side between the cover and the sleeve, whereby when the shaft is relatively rotated with respect to the sleeve, the working fluid is circulated through a space between the shaft and the sleeve, the space region on the close end side leading to the space between the shaft and the sleeve, the circular communication path leading to the space region on the close end side, and the space region on the open end side between the cover and the sleeve leading to the circular communication path, wherein an adhesive inflow allowing space is formed between an adhesive setting and bonding part for setting the adhesive and bonding the cover and the sleeve, and the space region on the open end side between the cover and the sleeve for circulating and introducing the working fluid, so as to include a space in at least one of the cover and the sleeve to allow the inflow of the adhesive from the adhesive setting and bonding part.