Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2001-04-20
2002-12-31
Sheehan, John (Department: 1742)
Metal working
Method of mechanical manufacture
Electrical device making
C029S596000, C148S108000
Reexamination Certificate
active
06499211
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an apparatus and method for assembly of a stator of a motor for operating an actuator of a disc drive. In particular, the present invention relates to a storage device and assembly method for magnetized magnets for a voice coil motor.
BACKGROUND OF THE INVENTION
A disc drive includes a plurality of stacked discs which are rotationally supported relative to a disc spindle and an actuator assembly movably supporting a plurality of head gimbal assemblies for reading and writing data to the discs. The actuator assembly includes an actuator drive typically a voice coil motor for actuating the head gimbal assemblies relative to selected data tracks of the discs.
The voice coil motor includes a stator defining a permanent magnetic field and a rotor coupled to an actuator block supporting the head gimbal assemblies. The rotor includes a bobbin having a voice coil wound about the bobbin. A voltage is supplied to the coil to selectively operate and move the actuator block to align the head gimbal assemblies relative to predetermined data tracks of the discs.
A typical stator includes upper and lower pole plates or backirons which are supported relative to the disc drive assembly in a spaced relation and include a magnet coupled thereto to define a flux gap therebetween. The rotor (bobbin and voice coil) coupled to the actuator block moves in the flux gap between the upper and lower pole plates.
Increased capacity disc drives are consistently being developed which have different operating requirements. For example, high density drives have developed which require higher capacity motors for moving the actuator block. Thus, it was desirable to develop a higher capacity actuator drive for providing more power for operating the actuator block of an increased capacity disk. However, higher energy magnets which are sufficient to operate an actuator block of an increased capacity disc of the type described are difficult to energize, handle, and assemble to form an actuator drive with known apparatus and techniques.
SUMMARY OF THE INVENTION
The present invention relates to a tray for storing magnetized magnets for assembly in a disc drive. The tray includes a base having a support surface and a cover sized to cover the support surface. The base is formed of a material having magnetic properties for attracting magnetized magnets for removably supporting the magnets until assembled in a voice coil motor. These and other features, which characterize the present invention, will be apparent from the following detailed description and Figures.
REFERENCES:
patent: 4169532 (1979-10-01), Scapellati
patent: 4935080 (1990-06-01), Hassell et al.
patent: 5260618 (1993-11-01), Dunfield et al.
patent: 5270887 (1993-12-01), Edwards et al.
patent: 5396388 (1995-03-01), Brown
patent: 5459362 (1995-10-01), Dunfield et al.
patent: 5477401 (1995-12-01), Squires et al.
patent: 5536984 (1996-07-01), Stuart et al.
patent: 5537270 (1996-07-01), Morehouse et al.
patent: 5570250 (1996-10-01), Casey
patent: 5669516 (1997-09-01), Horn
patent: 5783370 (1998-07-01), Groom et al.
patent: 6006906 (1999-12-01), Winnard
patent: 6145189 (2000-11-01), Fahley
FIGS. A0-1 and A0-2 illustrating assembly device (Prior to Apr. 30, 1997).
Seagate Technology LLC
Sheehan John
Westman Champlin & Kelly P.A.
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