Hard Disk Drive Cover Support Structure for Deflection Control
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Solution Overview
Problem
Hard disk drives face issues with cover deflection and vibration during manufacturing and use, which can lead to debris generation, damage to internal components, and increased error rates due to the small gap between the cover and internal components, especially when handling or evacuating the device.
Innovation Solution
Incorporating a cover support structure within the hard disk drive to inhibit movement of the cover, such as deflection or vibration, by contacting the interior surface of the cover at non-apertured locations, thereby preventing contact with internal components and reducing the risk of damage or debris generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cover thickness is reduced to increase interior space, then the storage capacity is improved, but the cover becomes more susceptible to deflection and vibration
Solution Approach 1:
A support structure is introduced as an intermediary element between the cover and the base. This support structure contacts the interior surface of the cover at non-apertured locations to provide stabilization, allowing the cover to be thinner while maintaining structural integrity and preventing excessive deflection during handling and operation.
2Reliability
If the cover is secured to the base at selected locations, then the sealing is improved, but the flat portion of the cover remains susceptible to movement at locations spaced from secured locations
Solution Approach 1:
The support structure is positioned at specific locations on the cover's interior surface, segmented from the perimeter secured locations. This segmentation allows the perimeter to maintain sealing function while the interior support structure provides additional stabilization points to prevent deflection in the flat portion of the cover.
3Volume of moving object
If the cover deflects toward internal components, then the space utilization is maximized, but debris particles are generated and internal components may be damaged
Solution Approach 1:
The support structure provides preliminary stabilization to the cover before handling or evacuation operations begin. By contacting the interior surface of the cover at non-apertured locations, the support structure prevents excessive deflection toward internal components, thereby preventing debris generation and potential damage in advance.
4Length of moving object
If the cover is made thinner to reduce enclosure size, then the device compactness is improved, but the cover becomes more prone to vibration and movement
Solution Approach 1:
The support structure serves as an intermediary stabilization element that compensates for the reduced structural rigidity of thinner covers. By providing contact points on the interior surface, the support structure enables the use of thinner cover material while maintaining adequate vibration and deflection resistance.
Data Source
AI summary
Described are electronic hard disk drives that are made to include: a base; a cover; interior components such as a stack of magnetic recording disks, reading and recording heads, electronics to read and record and to transfer data to and from an external electronic device; and a cover support at the interior of the device to inhibit movement of the cover.