Patent ID: 6052255
Filing Date: 2000-04-18
Classification: G11B

Abstract:
A magnetic disk unit comprising a spindle mechanism for rotating a magnetic disk, a head positioning mechanism for positioning a magnetic head by shifting said magnetic head along a recording surface of said magnetic disk, a base supporting said spindle mechanism and said head positioning mechanism, and an impact cover that covers in a non-contacting relationship said spindle mechanism and said head positioning mechanism supported on said base,wherein said base includes an oblong base plate and a base retaining plate for restraining said base plate, a joint portion of said base plate and said base retaining plate contains a cushioning material therein wherein said base retaining plate extends to a lower edge portion of said impact cover and is fitted into and connected to said impact cover in an inner portion of said impact cover, and said base retaining plate is provided with openings defining plastically deformable base portions which are plastically deformed so as to engage portions of said impact cover to lock said base retaining plate and said impact cover together.