Plastic HDD Base with Metal Reinforcement Ribs
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Solution Overview
Problem
Conventional hard disk drives (HDDs) face challenges with mechanical strength, weight, and manufacturing costs due to their metal casings, which are prone to damage from impacts and require costly post-machining, while also being inefficient in terms of material usage and logistics.
Innovation Solution
A HDD base made of plastic with a rigid member and anchor formations that secures critical components in a common plane, reducing relative motion and providing structural integrity, along with a non-plastic coating to minimize contamination and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal material is used for HDD base to provide mechanical strength, then strength is improved, but weight increases and manufacturing cost increases
Solution Approach 1:
The patent uses a composite structure combining plastic material for the base body with metal reinforcement ribs embedded within. This allows the majority of the base to be lightweight plastic while specific structural elements provide metal-level strength where needed, resolving the contradiction between overall weight reduction and localized strength requirements.
Solution Approach 2:
The base is segmented into different functional zones: the main body uses lightweight plastic material, while strategic reinforcement ribs use metal material. This segmentation allows weight reduction in non-critical areas while maintaining strength in load-bearing regions, addressing both weight and strength requirements simultaneously.
2Strength
If metal material is used for HDD base to provide mechanical strength, then strength is improved, but manufacturing cost increases
Solution Approach 1:
The composite design allows injection molding of the plastic base with integrated metal ribs, combining efficient plastic manufacturing with targeted metal reinforcement. This reduces the need for expensive post-machining operations on solid metal bases while maintaining structural integrity.
Solution Approach 2:
The manufacturing process merges plastic injection molding with metal rib integration in a single base structure, eliminating separate assembly steps and reducing overall manufacturing complexity. The metal ribs are embedded during base formation rather than added as separate components.
3Weight of moving object
If less metal material is used in HDD base to reduce weight, then weight is reduced, but strength deteriorates
Solution Approach 1:
The base exhibits local quality variation where the majority of the structure uses lightweight plastic, but specific reinforcement ribs use metal material at critical stress points. This localized metal reinforcement provides necessary strength while minimizing overall weight compared to a fully metal base.
Solution Approach 2:
The composite construction strategically places metal material only where structural reinforcement is needed, rather than using metal throughout. This optimizes the weight-strength ratio by concentrating heavy material in load-bearing regions while using lightweight material elsewhere.
4Strength
If rigid metal casing is used to protect HDD from impact, then strength is improved, but shock transmission to components increases
Solution Approach 1:
The base provides localized rigidity through metal reinforcement ribs at critical mounting points while the overall plastic structure offers some shock absorption. This creates a gradient of stiffness that protects components at anchor points while dampening impact forces transmitted through the base structure.
Data Source
AI summary
The present invention relates to a HDD base comprising: at least two anchor formations for anchoring at least two parts of a HDD; and a rigid member configured to retain anchor formations in a fixed position relative to each other.