Disk Device Top Cover Curved Portion Impact Protection
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Solution Overview
Problem
Existing disk devices do not adequately protect data written on disk media from impact-induced damage, as the data zone on the disk medium can come into contact with the top cover during external shocks, leading to potential data loss.
Innovation Solution
The disk device incorporates a top cover with a specific configuration, including a center horizontal portion, curved portion, and outer horizontal portion, with a flat surface extending to the outer edge of the data zone, ensuring that any contact during impact occurs in the invalid zone, thereby protecting the data zone from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the disk medium is covered by a housing to protect from impact, then the disk medium is protected from general impact, but the data zone may still come into contact with the top cover during external shocks leading to data loss
Solution Approach 1:
The top cover is designed with a specific structure where the outer peripheral portion of the center horizontal portion extends to a position radially outside the data zone. This creates a local protective quality at the critical interface between the top cover and data zone, ensuring that impact forces are directed to the invalid zone rather than the data zone, thereby resolving the contradiction between general impact protection and specific data protection
Solution Approach 2:
The patent introduces an intermediary protective structure - the specifically configured top cover with its center horizontal portion, curved portion, and outer horizontal portion - that acts as a mediator between the external impact and the data zone. This intermediary structure redirects impact forces away from the data zone to the invalid zone, preventing direct contact between impacting objects and the data zone while maintaining overall housing protection
2Object-affected harmful factors
If the top cover is designed to extend close to the disk medium for better protection, then impact protection is improved, but the risk of data zone contact during impact increases
Solution Approach 1:
The top cover employs local quality differentiation by extending the outer peripheral portion of the center horizontal portion to a position radially outside the data zone, while maintaining appropriate spacing over the data zone itself. This localized extension creates a protective buffer that directs impacts to the invalid zone without compromising data zone safety
Solution Approach 2:
The patent converts the potential harmful contact between the top cover and data zone during impact into a beneficial protective mechanism. By designing the top cover to extend to a position outside the data zone, any contact that occurs during impact is deliberately directed to the invalid zone, transforming what would be harmful data zone contact into a beneficial redirection of impact forces away from critical data areas
Data Source
AI summary
A disk device includes a top cover and a disk medium with a recording surface. The top cover includes a center horizontal portion having a surface which extends from a center point of the disk medium along the recording surface to an outer peripheral portion, a curved portion having a surface which extends from the outer peripheral portion of the center horizontal portion in a direction away from the recording surface, and an outer horizontal portion having a surface which extends from the curved portion in a direction away from the center point and along the recording surface. The recording surface includes a first zone in which data is set to be written, and a second zone in which data is set not to be written, the second zone being disposed adjacent to the first zone on an outer edge side of the disk medium from the first zone.