Magnetic Disk Stack Clamping with Controlled Torque for Impact Resistance
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Solution Overview
Problem
Magnetic disk devices face a trade-off between increasing capacity and impact resistance due to reduced thickness leading to decreased rigidity and deformation from impacts.
Innovation Solution
A magnetic disk device design incorporating disk-shaped magnetic disks with through-holes, spacers with through-holes, a hub, a clamp, and a fastening member that fastens the clamp to the hub with a torque of 5 cN·m to 45 cN·m, enhancing rigidity and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thickness of the magnetic disk is reduced to increase the number of mounted magnetic disks, then the capacity of the magnetic disk device is improved, but the rigidity and impact resistance of the magnetic disk decline
Solution Approach 1:
The magnetic disk device is segmented into multiple thin magnetic disks stacked together, allowing the total capacity to be increased by adding more disks rather than making individual disks thicker. This segmentation enables higher capacity while maintaining thin individual disk thickness.
Solution Approach 2:
A composite structure is formed by stacking multiple magnetic disks with spacers between them. The spacers act as reinforcing elements that distribute impact forces across the stacked assembly, improving overall impact resistance without increasing individual disk thickness.
2Quantity of substance
If the thickness of the magnetic disk is reduced to increase the number of mounted magnetic disks, then the capacity of the magnetic disk device is improved, but the rigidity of the magnetic disk declines
Solution Approach 1:
The stacked assembly of thin magnetic disks combined with spacers creates a composite structure that maintains rigidity. The spacers provide structural support that prevents the thin disks from bending or deforming, effectively maintaining rigidity despite reduced individual disk thickness.
Solution Approach 2:
Spacers are introduced as intermediary elements between the magnetic disks. These spacers act as mediators that provide structural support and maintain the rigidity of the stacked assembly, allowing thin disks to be mounted without compromising overall structural stability.
3Quantity of substance
If the thickness of the magnetic disk is reduced to increase the number of mounted magnetic disks, then the capacity of the magnetic disk device is improved, but the magnetic disk is more likely to deform when subjected to impact
Solution Approach 1:
Spacers are positioned beforehand between the magnetic disks to cushion impact forces. When impact occurs, the spacers absorb and distribute the force across the stacked assembly, preventing the thin magnetic disks from deforming before the impact can cause damage.
Solution Approach 2:
The composite structure of stacked disks with spacers creates a system that resists impact deformation. The spacers act as protective elements within the composite structure, preventing harmful deformation of the thin magnetic disks when subjected to external impacts.
Data Source
AI summary
A magnetic disk device includes a plurality of disk-shaped magnetic disks 30, spacers 80, a hub 90, a clamp 70, and a fastening member 72. Each of the magnetic disks 30 includes a through-hole in a center section thereof. Each of the spacers 80 includes a through-hole in a center section thereof, and is disposed among the magnetic disks 30. The hub 90 is inserted into the through-holes of the magnetic disks 30 and the spacers 80. The clamp 70 presses and holds the magnetic disks 30 and the spacers 80. The fastening member 72 fastens the clamp 70 to the hub 90. The clamp 70 is fastened to the hub by the fastening member 72 with a torque of from 5 cN·m to 45 cN·m.