[54] COMPOUND BEARING ASSEMBLY FOR SWING ARM OF HAND DISC DRIVE
[75] Inventor: Rikuro Obara, Nagano-ken, Japan
[73] Assignee: Minebea Kabushiki-Kaisha,
Nagano-ken, Japan
[ * ] Notice: This patent is subject to a terminal disclaimer.
[21] Appl. No.: 08/736,457
[22] Filed: Oct. 24, 1996
[30] Foreign Application Priority Data
Oct. 25, 1995 [JP] Japan 7-300610
[51] Int. C I. F16C 19/08
[52] U.S. CI 384/504; 384/520
[58] Field of Search 384/490, 504,
384/510, 512, 513, 517, 537
[56] References Cited
U.S. PATENT DOCUMENTS
2,858,200 3/1958 Boullion 384/520 X
5,106,210 4/1992 Chi 384/510 X
5,509,198 4/1996 Takamizawa et al 29/898.09
5,556,209 9/1996 Obara et al 384/504
Primary Examiner—-Thomas R. Hannon
Attorney, Agent, or Firm—Lowe, Price, LeBlanc & Becker
[57] ABSTRACT
A compound bearing assembly for a swing arm ol a hard disc drive is disclosed, which comprises a stepped shaft 1 having a large-diameter portion and a small-diameter portion lb, the large-diameter portion la having an inner raceway groove 2a directly formed in the outer periphery, a distinct-component outer race ring 3 disposed around the large-diameter portion la and having an outer raceway groove 2b formed in the inner periphery, a plurality ol balls provided between the inner and outer raceway grooves 2a and 2b, a ball bearing unit 5 having an inner and an outer race ring 5a and 5b and a plurality ol balls 6 provided therebetween, the inner race ring 5a being fitted on the small-diameter portion lb ol the stepped shaft, and a sleevelike spacer 1 between the distinct-component outer race ring 3 and the outer race ring 5b ol the ball bearing unit 5 and having opposite end small-diameter portions, on which the outer race rings 3 and 5b are fitted, respectively.
2 Claims, 3 Drawing Sheets
