Disk drive device provided with fluid dynamic bearing
AssigneeSamsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
InventorsTakuji Yamada, Yuji Omura, Mitsuo Kodama
Life of this patent
Estimating the term…
Abstract
A sleeve supports a shaft. A housing member is arranged so as to surround the sleeve and make the end of the sleeve protrude. A base member holds the housing member and fixes a stator core so as to surround the housing member. A hub drives a recording disk by being rotated integrally with the shaft, with a magnet being fixed to an annular portion concentric with the shaft so as to face the stator core fixed to the base member. A thrust member is rotated integrally with the hub, and a descender portion and a ring portion.
Claims20
A disk drive device comprising:
- a hub on which a recording disk is to be mounted;
- a shaft that is rotated integrally with the hub;
- a supporting member that surrounds the shaft and that has a flange radially extending outward at the hub side edge;
- a base member that supports the supporting member;
- and
- a cylindrical thrust member that is rotated integrally with the hub,
- wherein the hub has a step portion on the inner portion of the hub,
- wherein a top portion of the thrust member is partially affixed to the step portion of the hub in the axial direction, and
- wherein a part of the top portion of the thrust member not partially affixed axially faces at least part of the flange.
A disk drive device comprising:
- a hub on which a recording disk is to be mounted;
- a shaft that is rotated integrally with the hub;
- a supporting member that surrounds the shaft and that has a flange radially extending outward at the hub side edge;
- a base member that supports the supporting member;
- and
- a cylindrical thrust member that is rotated integrally with the hub,
- wherein the hub has a step portion on the inner portion of the hub,
- wherein a top portion of the thrust member is partially affixed to the step portion of the hub in the axial direction,
- wherein a part of the top portion of the thrust member not partially affixed axially faces at least part of the flange,
- wherein the supporting member has an inner member that surrounds the shaft and an outer member that surrounds the inner member,
- wherein the outer member is fixed to the base member,
- wherein the outer member has a cylindrical portion and a bottom portion, the two portions being integrally formed, and
- wherein the bottom portion is provided near to the base member side edge of the inner member.
A disk drive device comprising:
- a hub on which a recording disk is to be mounted;
- a shaft that is rotated integrally with the hub;
- a supporting member that surrounds the shaft and that has a flange radially extending outward at the hub side edge;
- a base member that supports the supporting member;
- and
- a cylindrical thrust member that is rotated integrally with the hub,
- wherein the hub has a step portion on the inner portion of the hub,
- wherein a top portion of the thrust member is partially affixed to the step portion of the hub in the axial direction,
- wherein a part of the top portion of the thrust member not partially affixed axially faces at least part of the flange, and
- wherein the base member is formed of an aluminum sheet or a steel plate.
Dependencies are inferred from the claim text.