Dual Load-Beam Suspension Structure for Stable, Thinner Disk Drives
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing disk drives face challenges in achieving thinner designs to accommodate increased recording density and multiple disks without compromising stability and precision.
Innovation Solution
A disk drive suspension structure with a base member comprising a base portion and attachment portion, featuring first and second load beams with bent portions and inclined surfaces, allowing for a thinner design by reducing the distance between magnetic disks and improving resonance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of the arm is reduced to reduce the distance between magnetic disks, then the disk drive can accommodate more disks and achieve higher recording density, but the structural stability and precision of the suspension structure deteriorates
Solution Approach 1:
The base member is divided into a base portion and an attachment portion, with the attachment portion featuring multiple attachment surfaces at different positions. This segmentation allows the load beams to be attached at multiple locations, distributing the mechanical load and maintaining structural stability even when the overall arm thickness is reduced.
Solution Approach 2:
The attachment surfaces are arranged in different positions along the longitudinal direction of the load beam, utilizing the longitudinal dimension to create multiple attachment points. This dimensional arrangement allows for reduced arm thickness while maintaining structural integrity through distributed attachment geometry.
2Productivity
If the number of magnetic disks is increased to improve recording capacity, then the recording density increases, but the distance between disks must be reduced which compromises the stability of the suspension structure
Solution Approach 1:
The base member is segmented into multiple attachment surfaces positioned at different locations along the load beam. This segmentation enables multiple disks to be mounted with adequate spacing while maintaining structural stability through distributed attachment points that prevent excessive flexing or vibration.
Solution Approach 2:
Different regions of the base member have different attachment characteristics - the attachment surfaces are positioned at specific locations along the longitudinal direction to provide localized support at critical points, ensuring stability in the regions where disks are mounted closest together.
3Length of stationary object
If the arm thickness is reduced to make the disk drive thinner, then the distance between magnetic disks decreases allowing more disks, but the resonance characteristics and precision of the head gimbal assembly deteriorate
Solution Approach 1:
The base member is divided into a base portion and attachment portion with multiple attachment surfaces. This segmentation creates a distributed attachment system that maintains rigidity and precision in the head gimbal assembly even when the overall arm thickness is reduced, preventing excessive resonance.
Solution Approach 2:
The base member and load beams are formed from materials with appropriate elastic properties that balance thinness with rigidity. The composite structure of the base member with its attached load beams provides the necessary stiffness to maintain precision while achieving the desired thin profile.
Data Source
AI summary
According to one embodiment, a disk drive suspension structure includes a base member including a base portion and an attachment portion connected to the base portion, the base portion including a boss portion attached to the arm, the attachment portion including a first attachment surface facing in a direction opposite to a projection direction of the boss portion and a second attachment surface facing in the projection direction of the boss portion, a first load beam attached to the first attachment surface, and a second load beam attached to the second attachment surface and facing the first load beam.