Patent ID: 8591113

Claim:
A fluid dynamic bearing device, comprising: a shaft member; a bearing sleeve which forms a radial bearing gap with an outer peripheral surface of the shaft member and which includes an outer peripheral chamfer on a first end thereof, in an axial direction; a housing which accommodates the bearing sleeve and which is opened at a first end thereof and a second end thereof, in the axial direction; and a lid member which closes an opening on the first end of the housing and forms a thrust bearing portion, wherein the housing is an injection-molded product into which the bearing sleeve is inserted; wherein the housing includes an integrally formed chamfer covering portion, on the first end of the housing, which covers the outer peripheral chamfer of the first end of the bearing sleeve, such that the integrally formed chamfer covering portion is at least partially disposed between the outer peripheral chamfer of the first end of the bearing sleeve and the lid member, in the axial direction; wherein the housing includes an integrally formed seal portion, on the second end of the housing, which covers an end surface on a second end of the bearing sleeve, the integrally formed seal portion forming a seal space between the housing and the shaft member; and wherein the lid member is fixed to an outer peripheral surface of the housing.