Disk vibration damper having an integrated air circulation guide

• US 7,593,181 B1
• Filed: 12/16/2005
• Issued: 09/22/2009
• Est. Priority Date: 12/16/2005
• Status: Active Grant

• Current Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Original Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Inventors: Cheng, Chunjer Chuck, Yang, Lin, Tsay, Alex Y., Ou-Yang, Jin Hui
• Primary Examiner(s): Wellington; Andrea L
• Assistant Examiner(s): Dravininkas; Adam B
• Application Number:
  US11/305,550
• Time in Patent Office: 1,376 Days
• Field of Search: 360 9701- 9704
• US Class Current: 360/97.03
• CPC Class Codes: G11B 25/043 using rotating discs
• CPC Class Codes: G11B 33/148 Reducing friction, adhesion, drag

Abstract

A stationary plate functions as a vibration damper and has an integrated air filtration guide. In one embodiment the stationary plate is disposed between two adjacent disks, and the guide comprises one or more grooves through which rotation-induced air may flow. In another embodiment, a plurality of stationary plates may be disposed between a plurality of disks, wherein each of the plurality of stationary plates has a grooved side through which the rotation-induced air may flow. In still another embodiment, the orientation of the grooves in the stationary plate is such that the rotationally-induced airflow impinges the disk drive'"'"'s voice coil motor.

Claims

1. A disk drive comprising:

an upper disk;

a lower disk;

a spindle motor to which the upper disk and lower disk are attached to rotate about an axis of rotation;

a stationary plate disposed between said upper disk and lower disk, said stationary plate comprising

a plurality of grooves through which rotation-induced air flows from an inlet end to an outlet end,

a top side facing said upper disk, and

a bottom side facing said lower disk; and

a recirculation filter coupled to said outlet end of said plurality of grooves,

wherein said plurality of grooves have a first width at said inlet end and a second width at said outlet end, where said second width is less than said first width.

2. The disk drive of claim 1, wherein said plurality of grooves are tapered from said inlet end to said outlet end.

3. The disk drive of claim 1, wherein said second width is between about 20% and about 80% less than said first width.

4. A disk drive comprising:

a disk;

a spindle motor to which the disk is attached to rotate about an axis of rotation;

a stationary plate facing said disk, wherein the stationary plate includes a plurality of grooves through which rotation-induced air flows from an inlet end to an outlet end; and

a recirculation filter coupled to said outlet end of said plurality of grooves,

wherein said plurality of grooves have a first width at said inlet end and a second width at said outlet end, where said second width is less than said first width.

5. The disk drive of claim 4, wherein said plurality of grooves are tapered from said inlet end to said outlet end.

6. The disk drive of claim 4, wherein said second width is between about 20% and about 80% less than said first width.