Sony Corporation

Hitachi Global Storage Technologies Netherlands B.v.

Ichiro Koyanagi

Kenichiro Yazawa

Takao Suzuki

Hiroshi Sato

Kohichi Takeuchi

Naoaki Kanada

Yoshiaki Kakinuma

A bearing unit includes: a shaft; a radial bearing configured to support the shaft in a circumferential direction; a thrust bearing configured to support one end of the shaft in a thrust direction; a housing having the radial bearing and the thrust bearing disposed in the inside and having a closed structure except a shaft insertion hole into which the shaft is fitted; a coming out preventing member provided on one end side of the radial bearing at which the thrust bearing is provided configured to prevent the shaft from coming out from the radial bearing; and viscous fluid filled in the housing. The coming out preventing member is made of a resin material having a value of a Young's modulus equal to or higher than 3.4 GPa.

Bearing unit, and motor and electronic apparatus having bearing unit

Disclosed herein is a bearing unit including a shaft; a radial bearing for supporting the outer circumferential surface of the shaft; a housing for accommodating the radial bearing, the housing having an open end from which the shaft is inserted and a closed end opposite to the open end in the axial direction of the shaft; a lubricating oil filled in the housing to reduce rotational friction of the shaft; a holding member provided at the open end of the housing for holding the lubricating oil; and a sealing member for closing the open end of the housing to prevent the leakage of the lubricating oil; wherein the sealing member having a side wall portion interposed between the holding member and the shaft and opposed to the outer circumferential surface of the shaft.

Bearing unit, motor using the bearing unit, and electronic equipment using the motor

A rebounding phenomenon of an actuator assembly is to be prevented and device assembling work and maintenance work are to be carried out separately from stopper removing work. In one embodiment, a magnetic disk device includes a stopperfor restricting a turning range of an actuator assemblyhaving a coil supportin a magnetic disk device. In the stopper, rubberis cantilevered by a support rodso as to undergo a moment of force and fulfill a shock absorbing function in order to restrict an excessive movement of the actuator assemblyto an inner or an outer side when the rubberis abutted against a first armor a second armof a bifurcated shape of the coil support, the support rodis disposed outside a turning track of turning ends of the first and second armsof the coil support, and a permanent magnetis embedded in the rubberto attract the first and second arms

Rotary disk storage device

Growing community of inventors

Kanagawa, Japan

Ichiro Koyanagi