Hard Disk Head Suspension Resilient Part Relocation
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Solution Overview
Problem
The existing head suspension design for hard disk drives limits the reduction of laminated dimensions on the disk side face, hindering the thinning of hard disk drives, particularly in small-sized applications like portable phones.
Innovation Solution
The resilient part is fixed to the opposite disk side face, and the flexure is fixed to the arm side face, allowing the thickness of the resilient part to not influence the laminated dimension of the disk side face, thereby enabling the thinning of hard disk drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the resilient member and flexure are sequentially laminated on the disk side face of the arm, then the head suspension can be assembled, but the laminated dimension of the disk side face increases, preventing the hard disk drive from thinning
Solution Approach 1:
The resilient member is repositioned from the disk side face to the opposite disk side face (arm side face), utilizing the third dimension (depth/thickness) rather than increasing the laminated dimension on the disk side face. This dimensional relocation allows the flexure to be directly mounted on the disk side face without sequential lamination, thereby reducing the laminated dimension while maintaining structural integrity through the closed-section structure of the resilient member.
2Strength
If the thickness of the resilient member is increased to improve structural stability, then the head suspension becomes more robust, but the overall thickness of the head suspension increases, preventing hard disk drive thinning
Solution Approach 1:
The resilient member is relocated to the opposite disk side face, allowing its thickness to contribute to the overall height of the head suspension rather than increasing the laminated dimension on the disk side face. This enables the thickness of the resilient member to be optimized for structural stability without directly increasing the laminated dimension that constrains hard disk drive thinning.
Solution Approach 2:
The closed-section structure of the resilient member provides high structural stability and torsional rigidity relative to its thickness, allowing thinning of the head suspension while maintaining robustness. The composite arrangement of the resilient member with the arm and load beam creates a structurally efficient assembly.
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
This configuration contributes to the thinning of hard disk drives by decoupling the thickness of the resilient part from the disk side face laminated dimension, while improving torsional rigidity through a closed section structure.
Implementation Method 1
The resilient part 111 is composed of a resilient member 113 separated from and disposed between the rigid part 109 and the arm 103
Implementation Method 2
The flexure 107 leads from the rigid part 109 to the arm 103 while the flexure 107 overlaps the resilient member 113
Data Source
AI summary
A head suspension for a hard disk drive has an arm to be attached to a carriage of the hard disk drive and turned around a spindle, a load beam including a rigid part and a resilient part, to apply load onto a head that is arranged at a tip end thereof to write and read data to and from a disk arranged in the hard disk drive, a base end of the rigid part supported on the arm side through the resilient part, and a flexure having read/write wiring patterns connected to the head, the flexure supporting the head and attached to a disk side face of the rigid part, the resilient part at least separated from the arm side and fixed to an opposite disk side face on the arm side and the flexure fixed to a disk side face on the arm side.