Balance corrector
AssigneeToshiba Storage Device Corporation
InventorsToru Kohei, Nobuyoshi Nakayama, Shigeyuki Kotake, Keiji Aruga
Life of this patent
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Abstract
An apparatus that corrects a weight imbalance around an axis of a spindle motor that rotates a disc in a disc drive includes an impact applicator that applies an impact to a housing that houses the spindle motor and the disc, a plate that supports the housing and impact applicator, a spring member that supports the plate, and enables the plate and the housing to vibrate together when the spindle motor rotates, and a detector that detects a vibration of the housing when the spindle motor rotates.
Claims4
An apparatus that corrects a weight imbalance around an axis of a spindle motor that rotates a disc in a disc drive, said apparatus comprising:
- an impact applicator that applies an impact to a housing that houses the spindle motor and the disc;
- a plate that supports said housing and impact applicator;
- a fixture member mounted on said plate and configured to fix the impact applicator, the impact applicator being located between said fixture member and said housing;
- a spring member that supports said plate, and enables said plate and said housing to vibrate together when the spindle motor rotates;
- and
- a detector that detects a vibration of the housing when the spindle motor rotates.
An apparatus that corrects a weight imbalance around an axis of a spindle motor that rotates a disc in a disc drive, said apparatus comprising:
- an impact applicator that applies an impact to a housing that houses the spindle motor and the disc;
- a plate that supports said housing and impact applicator;
- a spring member that supports said plate, and enables said plate and said housing to vibrate together when the spindle motor rotates;
- and
- a detector that detects a vibration of the housing when the spindle motor rotates,
- wherein said spring member has a spring constant k that satisfies ωo≦ωp=√k/m, where m is a total weight supported by said spring member, ωo is a rotating frequency of the spindle motor, and ωp is a resonance frequency of the housing and plate.
A manufacturing method of a disc drive that rotates plural discs using a spindle motor and records information in and reproduces the information from the discs, said manufacturing method comprising the steps of:
- leaning the plural discs to the same side of the spindle motor;
- and
- correcting a weight imbalance around an axis of the spindle motor by using an apparatus that comprises an impact applicator that applies an impact to a housing that houses the spindle motor and the disc, a plate that supports said housing and impact applicator, a fixture member mounted on said plate and configured to fix the impact applicator, the impact applicator being located between said fixture member and said housing, a spring member that supports said plate, and enables said plate and said housing to vibrate together when the spindle motor rotates, and a detector that detects a vibration of the housing when the spindle motor rotates.
Dependencies are inferred from the claim text.