Patent ID: 7258487

Claim:
A bearing unit comprising: a shaft extending along an axial direction; a radial bearing which supports the shaft in a circumferential direction of the shaft; a spacing member forming a thrust bearing which supports an end of the shaft in a thrust direction of the shaft, the spacing member having a pair of regulation protrusions projecting in the axial direction and generally spaced apart angularly equidistantly from one another relative to the shaft; a housing having a closed structure except for a shaft insertion hole in which the shaft is inserted, with the radial bearing and the thrust bearing being provided inside the housing; a stopper member provided on an end side of the radial bearing where the thrust bearing is provided, to prevent the shaft from being pulled out of the radial bearing and disposed in the spacing member, the stopper member having at least one linearly extending movement direction regulation part and an arcuate support part integrally connected to the at least one movement direction regulation part, the at least one movement direction regulation part operative to contact the pair of regulation protrusions; and viscous liquid filled in the housing, wherein the stopper member is made of an elastic member which is elastically deformed only in the radial direction of the shaft when the shaft is inserted in the housing, and is hardly deformed in the axial direction.