Patent ID: 8366321

Claim:
A bearing unit, comprising: a shaft; a radial bearing configured to support said shaft in a circumferential direction; a thrust bearing configured to support one end of said shaft in a thrust direction; a housing having said radial bearing and said thrust bearing disposed in the inside and having a closed structure except a shaft insertion hole into which said shaft is fitted; a coming out preventing member provided on one end side of said radial bearing at which said thrust bearing is provided configured to prevent said shaft from coming out from said radial bearing; and viscous fluid filled in said housing, wherein said coming out preventing member has a lamination structure of two or more layers each having a Young's modulus equal to or higher than 4.1 GPa, and the lamination structure of the coming out preventing member comprises a first layer and a second layer each having a thickness of 7.5 μm and made of a resin material having a Young's modulus of 4.1 GPa, and an adhesive layer having a thickness of 25 μm and formed between the first layer and the second layer to adhere the first layer and the second layer to each other.