Patent ID: 8052328

Claim:
A bearing device comprising: a sliding bearing including a metal part formed by electroforming and a resin part formed by molding with the metal part located at an inner periphery of the resin part; a shaft member inserted into an inner periphery of the sliding bearing, with a bearing gap being formed between an inner peripheral surface of the sliding bearing and an outer peripheral surface of the shaft member; and an oil sump for supplying oil to the bearing gap, wherein the metal part has a cup-like configuration with a thickness in a range from 10 to 200 μm, an inner peripheral surface and an inner bottom surface of the metal part are a surface deposited on a surface of a master shaft, and the inner peripheral surface of the metal part is a bearing surface, the shaft member has a convex spherical portion at a lower end thereof, a thrust bearing portion supporting the shaft member in a thrust direction is formed between the convex spherical portion of the shaft member and the inner bottom surface of the metal part, and the oil sump is formed between the convex spherical portion of the shaft member and the inner peripheral surface and the inner bottom surface of the metal part.