Title:
SUBASSEMBLY OF DISK DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/099370
Kind Code:
A1
Abstract:
Disclosed is a subassembly of a disk drive device for reducing the slope of a surface on which a recording disk is placed. The subassembly (100) is provided with a base plate (10), a hub (12) upon which a recording disk (200) is to be placed, a shaft (16) coupled to an aperture portion (12d) of the center of the hub (12), and a bearing unit for supporting the shaft (16) so as to be rotatable relative to the base plate (10). The hub (12) comprises a barrel for holding the recording disk (200) and an outer extending portion (46) arranged consecutively thereto, and a seating surface (12b) formed upon the outer extending portion (46). In addition, the aperture portion (12d) has been configured to maintain a pressure-contact state with the shaft (16) at the temperature of processing when applying aging processing to at least the coupled portions of the hub (12) and the shaft (16) so that the slope value of the disk seating surface defined in a coupled state of the aperture portion (12d) with the shaft (16) falls to or below a pre-defined maximum tolerance with respect to a surface perpendicular to the axial direction.
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Inventors:
SAITO HIROSHI (JP)
Application Number:
PCT/JP2011/051545
Publication Date:
August 18, 2011
Filing Date:
January 27, 2011
Export Citation:
Assignee:
ALPHANA TECHNOLOGY CO LTD (JP)
SAITO HIROSHI (JP)
SAITO HIROSHI (JP)
International Classes:
G11B17/028; G11B17/038
Foreign References:
| JP2007257784A | 2007-10-04 | |||
| JP2001181760A | 2001-07-03 | |||
| JP2010205324A | 2010-09-16 |
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