Damping Insert Sheet for Disk Drive Shock Attenuation
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Solution Overview
Problem
Magnetic hard disk drives in information storage devices are vulnerable to external mechanical shocks, vibrations, and electromagnetic interference, requiring improved mounting systems and housings that balance performance, reliability, and cost while meeting space and cost constraints.
Innovation Solution
The use of a damping insert sheet with elastomeric cushions and a spanning sheet between the disk drive and the device housing, which provides mechanical shock and vibration attenuation, and optional electromagnetic shielding, enhancing the protection of the disk drive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a traditional rigid mounting system is used to secure the disk drive, then the structural stability is improved, but the transmission of mechanical shocks and vibrations to the disk drive increases
Solution Approach 1:
A damping insert sheet is introduced as an intermediary component between the rigid mounting structure and the disk drive. This sheet comprises multiple layers including a viscoelastic damping layer and a spanning sheet, acting as a mediator that decouples the rigid structural support from the sensitive disk drive, thereby reducing mechanical shock and vibration transmission while maintaining structural stability.
Solution Approach 2:
The damping insert sheet utilizes composite material construction, combining a viscoelastic damping layer with a spanning sheet (which may be metallic, plastic, or other suitable material). This composite structure provides both the mechanical support function and the vibration damping function, resolving the contradiction between structural stability and shock attenuation.
2Reliability
If additional damping and shielding components are added to protect the disk drive, then the protection level is improved, but the device complexity and space requirements increase
Solution Approach 1:
The damping insert sheet merges multiple protective functions into a single integrated component. It combines vibration damping, shock absorption, and optionally electromagnetic shielding properties within one sheet structure, eliminating the need for separate damping materials and shielding components, thus reducing overall system complexity while maintaining enhanced protection.
Solution Approach 2:
The damping insert sheet serves multiple functions simultaneously: it provides mechanical vibration damping, shock absorption, and can optionally provide electromagnetic shielding. This multi-functional design reduces the number of separate components needed, simplifying the mounting system while improving disk drive protection comprehensively.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The damping insert sheet effectively reduces the transmission of mechanical shocks and vibrations, improving the reliability and performance of the disk drive while maintaining a compact and cost-effective design.
Implementation Method 1
a damping insert sheet with elastomeric cushions and a spanning sheet between the disk drive and the device housing, which provides mechanical shock and vibration attenuation
Implementation Method 2
The damping insert sheet effectively reduces the transmission of mechanical shocks and vibrations
Data Source
AI summary
A novel information storage device is disclosed and claimed. The information storage device includes a device housing with a generally rectangular bay to accommodate a disk drive. The generally rectangular bay includes a base portion and a plurality of side portions. The information storage device further includes a damping insert sheet disposed between the disk drive and the base portion. The damping insert sheet has a plurality of elastomeric cushions, for example with a cushion thickness in the range 0.5 mm to 10 mm, and a spanning sheet, for example having a sheet thickness in the range 0.02 mm to 0.35 mm. Each of the plurality of elastomeric cushions is attached to the spanning sheet. Each of the plurality of elastomeric cushions contacts and is compressed between the generally rectangular bay and the disk drive.