Double grooved spacer for a disc drive
First Claim
1. A spacer interposable between first and second discs of a disc stack, the spacer disposed about an outer hub surface of a spindle motor hub to provide uniform distribution of a clamping force applied to the disc stack, comprising:
- a body portion;
an inner radial groove defining first and second spring flanges radially extending from the body portion toward the hub outer surface;
an outer radial groove defining third and fourth spring flanges extending from the body portion away from the hub outer surface so that the body portion in conjunction with the first, second, third and fourth flanges form a generally I-shaped cross-section; and
first, second, and third and fourth circumferentially extending contact nodes disposed respectively on the first, second, third and fourth spring flanges of the spindle motor hub, to localize the clamping force upon the first and second discs.
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0 Petitions
Accused Products
Abstract
The present invention provides a double grooved spacer for reducing coning of discs. A double grooved spacer includes a body portion with a plurality of spring flanges radially extending therefrom to form an inner radial groove and an outer radial groove. The body portion in conjunction with the plurality of spring flanges form a generally I-shaped cross-section. The double grooved spacer further includes circumferentially extending contact nodes disposed on the spring flanges so that the clamping force is localized at selected positions on the discs and the double grooved spacers to provide uniform distribution of the clamping force within the disc stack.
44 Citations
11 Claims
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1. A spacer interposable between first and second discs of a disc stack, the spacer disposed about an outer hub surface of a spindle motor hub to provide uniform distribution of a clamping force applied to the disc stack, comprising:
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a body portion;
an inner radial groove defining first and second spring flanges radially extending from the body portion toward the hub outer surface;
an outer radial groove defining third and fourth spring flanges extending from the body portion away from the hub outer surface so that the body portion in conjunction with the first, second, third and fourth flanges form a generally I-shaped cross-section; and
first, second, and third and fourth circumferentially extending contact nodes disposed respectively on the first, second, third and fourth spring flanges of the spindle motor hub, to localize the clamping force upon the first and second discs. - View Dependent Claims (2, 3, 4, 5)
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6. A disc drive, comprising:
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a spindle motor having a rotatable hub having a circumferentially extending hub outer surface;
first and second discs concentrically disposed about the hub to form a disc stack; and
a spacer interposed between the first and second discs and disposed about the spindle motor hub to uniformly distribute a clamping force applied to the disc stack, comprising;
a body portion;
first and second spring flanges defining an inner radial groove, the first and second spring flanges radially extending from the body portion toward the hub outer surface;
third and fourth spring flanges defining an outer radial groove, the third and fourth spring flanges extending from the body portion away from the hub outer surface so that the body portion, along with the first, second, third and fourth flanges form a generally I-shaped cross-section; and
a first, second, third, and fourth circumferentially extending contact nodes disposed respectively on the first, second, third and fourth spring flanges, respectively, to localize the clamping force at selected locations on the first and second discs. - View Dependent Claims (7, 8, 9, 10)
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11. A disc drive, comprising:
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first and second discs disposed about a spindle motor hub; and
spacing means for establishing an inter-disc spacing between the first and second discs, which provides uniform distribution of a clamping force.
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Specification