Patent ID: 7625124

Claim:
A fluid bearing device comprising: a housing formed of a resin material and filled with a lubricating oil; a bearing sleeve arranged inside the housing and having a radial bearing portion and an axial groove formed in an outer peripheral surface of the bearing sleeve for circulating the lubricating oil; a shaft member inserted into an inner peripheral surface of the bearing sleeve with the radial bearing portion supporting the shaft member in a radial direction with the lubricating oil located in a radial bearing clearance between the inner peripheral surface of the bearing sleeve and an outer peripheral surface of the shaft member; and a seal member sealing the housing filled with the lubricating oil, wherein an inner peripheral surface of the housing has a protruding part that protrudes radially inward at a position opposed to the axial groove of the bearing sleeve such that the axial groove and the protruding part of the inner peripheral surface of the housing are engaged in a rotating direction, and the bearing sleeve is press-fitted into the inner peripheral surface of the housing using ultrasonic vibration and welded thereto.