Claims
- 1. A magnetic latch for a disc drive system having a head positioner assembly for positioning a plurality of transducer heads relative to a recording media located within a disc housing, the head positioner assembly being movable with respect to the disc housing, the magnetic latch including:
- a bumper stop fixably mounted to the housing for limiting the head positioner assembly's movement in one direction;
- a strike plate carried by the head positioner assembly that is formed of a magnetic material; and
- magnet means supported in the bumper stop for magnetically engaging the strike plate to latch the head positioner assembly against the bumper stop when the drive is not in use, including a compliant element that extends beyond the magnet in the bumper stop toward the strike plate to insure that the magnet means firmly engages the strike plate while preventing the strike plate from hitting the magnet.
- 2. A magnetic latch for a disc drive system having a head positioner assembly for positioning a plurality of transducer heads relative to a recording media located within a disc housing, the magnetic latch including:
- a bumper stop for limiting the head positioner assembly's movement in one direction; the bumper stop having a recess therein;
- a strike plate carried by the head positioner assembly that is formed of a magnetic material;
- magnetic means supported in the bumper stop for magnetically engaging the strike plate to latch the head positioner assembly against the bumper stop when the drive is not in use; and
- a bumper means disposed within said recess, including a bumper pad formed of a resilient material and carries said magnetic means to cushion the impact of the strike plate when it strikes said magnetic means.
- 3. A magnetic latch as claimed in claim 2 wherein the bumper means includes a compliant element that extends past the magnet in the bumper stop toward the strike plate to ensure that the strike plate does not hit the magnet at the end of its path of travel.
- 4. A disc system comprising:
- a magnetic transducer head;
- a magnetic recording media;
- a head positioner assembly for positioning the transducer head relative to the recording media, the head positioner assembly including a pivot mechanism, a pivot housing that carries said transducer head, said pivot housing being journaled about the pivot mechanism, and a voice coil motor for rotating said pivot housing about said pivot mechanism, the voice coil motor having a center pole, a coil journaled about the center pole in a spaced apart relation and a pair of outer poles disposed on opposite sides of said coil;
- a bumper stop for limiting the head positioner assembly's movement in one direction, the bumper stop having a recess therein;
- a strike plate formed of a magnetic material, said strike plate being carried by the coil;
- magnet means carried by the bumper stop for magnetically engaging the strike plate to latch the head positioner assembly against the bumper stop when the drive is not in use; and
- a bumper means disposed within said recess including a bumper pad formed of a resilient material and carrying said magnetic means for cushioning the impact of the strike plate when it strikes said magnet means.
- 5. A disc drive as claimed in claim 4 wherein the bumper means includes a compliant element that extends past the magnet in the bumper stop toward the strike plate to ensure that the strike plate does not hit the magnet at the end of its path of travel.
- 6. A disc drive as claimed in claim 5 wherein said bump stop is supported outside a region defined by said pair of outer poles where said coil is moving, said strike plate being mounted on said coil outside the region defined by said coil, so that the bumper stop is defined directly behind the voice coil motor.
- 7. A disc drive as claimed in claim 5 wherein said magnet has a magnetic field with a very flat profile to minimize the effect of the latch on the head positioner when the heads are positioned over the storage disc.
- 8. A disc drive as claimed in claim 4 wherein said bump stop is supported outside a region defined by said pair of outer poles where said coil is moving, said strike plate being mounted on said coil outside the region defined by said coil, so that the bumper stop is defined directly behind the voice coil motor.
- 9. A disc drive is claimed in claim 4 wherein said magnet has a magnetic field with a very flat profile to minimize the effect of the latch on the head positioner when the heads are positioned over the storage disc.
Parent Case Info
This is a continuation, of application Ser. No. 220,329 filed July 19, 1988 new U.S. Pat. No. 4,890,176.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4594627 |
Viskochil |
Jun 1986 |
|
4881139 |
Hazebrouck |
Nov 1989 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
220329 |
Jul 1988 |
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