HDD Head Suspension Flexure Vibration Clearance
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Solution Overview
Problem
Conventional head suspension designs for hard disk drives face issues with color change and discoloration due to vibration contact during ultrasonic washing, limiting design flexibility and not effectively addressing contact at curved portions.
Innovation Solution
Incorporating recessed portions or through-hole portions on the load beam and base to prevent vibration contact between the flexure and the load beam or base, allowing for high design flexibility without elongating cut portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cut portion of the flexure is made longer to position free ends outside the rigid part, then color change due to vibration contact is suppressed, but design flexibility is reduced and layout restraint increases
Solution Approach 1:
The invention divides the load beam into multiple sections by introducing recessed portions at specific locations. These recessed portions segment the continuous load beam structure, allowing the flexure to be positioned within these segmented regions. This segmentation enables the free ends of the flexure to remain within the rigid part boundaries while preventing vibration contact, thus maintaining design flexibility without sacrificing protection against color change.
Solution Approach 2:
The invention transitions from a one-dimensional solution (extending the cut portion length) to a two-dimensional solution by introducing recessed portions that create vertical clearance space. The recessed portions form depressed regions on the load beam surface, providing a vertical dimension for the flexure to operate within, thereby preventing contact without requiring horizontal extension.
2Reliability
If the cut portion of the flexure is elongated to prevent contact with the rigid part, then vibration contact during ultrasonic washing is reduced, but the layout of the base material formation is restrained
Solution Approach 1:
The load beam is segmented by recessed portions that create distinct zones. The flexure is positioned within these segmented zones, allowing its free ends to remain within the rigid part boundaries while preventing vibration contact. This segmentation approach maintains manufacturing flexibility for base material formation without compromising reliability.
Solution Approach 2:
The recessed portions act as intermediary structures between the flexure and the rigid part. These recessed regions provide a buffer zone that mediates the interaction between the vibrating flexure and the rigid part, preventing direct contact while maintaining the original layout flexibility of the base material formation.
3Adaptability or versatility
If conventional flexure design is used without recessed portions, then design flexibility is maintained, but color change and discoloration occur on the load beam due to vibration contact
Solution Approach 1:
The load beam is divided into multiple sections by recessed portions, creating a segmented structure that allows the flexure to be positioned within these segments. This segmentation maintains design flexibility while preventing the flexure from contacting the rigid part during vibration, thereby eliminating color change and discoloration.
Solution Approach 2:
The invention adds a vertical dimension to the design by creating recessed portions that form depressed regions on the load beam surface. This dimensional change allows the flexure to operate within the vertical clearance provided by the recesses, maintaining horizontal layout flexibility while preventing contact-induced color change.
Data Source
AI summary
A head suspension for a hard disk drive has a base attached to a carriage of the hard disk drive and is turned around a spindle. A load beam includes a rigid part and a resilient part which applies load onto a head at a front end of the load beam to write and read data to and from a disk arranged in the hard disk drive. The rigid part is supported to the base through the resilient part. A flexure is attached to at least the rigid part of the load beam and has read/write wiring patterns connected to the head. A recessed portion or a through-hole portion is formed in at least one of the load beam and the base for avoiding vibration contact of the flexure.