Detachable Filter Unit for Hard Disk Drive Base
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Solution Overview
Problem
The increasing number of magnetic disks in hard disk drives (HDDs) requires thinner base materials, reducing the casing's strength and complicating filter attachment/detachment during repairs, as existing collection filters are often stuck to the casing and require disassembly for cleaning.
Innovation Solution
A filter unit with a detachable collection filter held by a holding frame, which is fixed to the casing's inner surface, allowing for easy attachment and detachment without deforming the base and simplifying maintenance by avoiding the filter being sandwiched between the top cover and base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of magnetic disks is increased to expand memory capacity, then the storage capacity is improved, but the wall thickness of the base must be made thinner which reduces the strength of the base
Solution Approach 1:
The patent introduces a holding frame as an intermediary component between the collection filter and the base. This holding frame distributes the load from the filter across a larger area of the base and provides structural support, preventing base deformation while allowing the base wall thickness to be reduced for accommodating more magnetic disks.
2Reliability
If the collection filter is stuck to the casing with adhesive to secure it, then the filter is firmly fixed, but the disassembly becomes complicated when repair is needed
Solution Approach 1:
The patent segments the filter assembly into three distinct components: the collection filter, the holding frame, and the base. The holding frame is detachably coupled to the base, allowing the filter to be firmly fixed during operation while enabling easy disassembly for repair by simply removing the holding frame without damaging the base or requiring adhesive removal.
3Reliability
If the collection filter is sandwiched between the top cover and the base to secure it, then the filter is firmly held, but the base may deform due to the load
Solution Approach 1:
The holding frame serves as a mediator between the collection filter and the base, bearing the load from the filter and distributing it to the base through a larger contact area. This prevents concentrated loading that would cause base deformation while maintaining firm fixation of the filter during operation.
4Quantity of substance
If the base wall thickness is reduced to accommodate more magnetic disks, then the storage capacity is improved, but the load from the collection filter can deform the base
Solution Approach 1:
The holding frame acts as a structural intermediary that compensates for the reduced base strength. It provides additional support to the base, distributing the filter load across a larger area and preventing deformation, thereby enabling the use of thinner base walls to accommodate more magnetic disks without compromising structural stability.
Data Source
AI summary
A disk apparatus includes a casing, a rotatable disk recording medium that is disposed within the casing, a head configured to process information with respect to the recording medium, an actuator assembly that is disposed within the casing and that movably supports the head, and a filter unit that is disposed within the casing. The filter unit includes a base section fixed to an inner surface of the casing, a holding frame coupled to the base, and a collection filter detachably held in place by the holding frame.