Magnetic Head Suspension With Nested Piezoelectric Adjusters
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Solution Overview
Problem
The existing magnetic head suspension designs face challenges in reducing thickness and weight while maintaining effective strain prevention and vibration characteristics, due to the overlapping and welding of multiple components which can lead to strain and increased thickness.
Innovation Solution
The magnetic head suspension design includes a flexure metal plate fixed to the load beam and supporting parts without overlapping three members, with piezoelectric elements positioned within an open section, allowing for symmetrical expansion and contraction, and using insulating layers and signal wiring to maintain flexibility and reduce rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple components (support plates, piezoelectric elements, flexure parts) are overlapped and welded together to achieve precise positioning and structural integrity, then the positioning accuracy and structural strength are improved, but the thickness and weight of the magnetic head suspension increase
Solution Approach 1:
The patent embeds the piezoelectric elements within the open section of the supporting part, nesting them between the proximal and distal end sections. The flexure part is integrated into the supporting part structure, eliminating the need for separate support plates and reducing overall thickness while maintaining positioning precision through the nested configuration.
Solution Approach 2:
The patent merges the supporting part and flexure part into a single integrated structure, eliminating the need for separate support plates. The piezoelectric elements are combined with the supporting part to form a unified assembly, reducing the number of components and overall thickness while maintaining structural integrity and positioning accuracy.
2Strength
If multiple components are overlapped and welded together to achieve precise positioning, then the structural strength is improved, but the weight of the magnetic head suspension increases
Solution Approach 1:
The patent merges multiple components into integrated structures, reducing the total number of parts and associated welding joints. The integrated supporting part and flexure part reduce weight while maintaining structural strength through optimized design, eliminating redundant materials and welding seams that would increase weight.
Solution Approach 2:
By nesting piezoelectric elements within the supporting part structure and integrating the flexure part, the patent eliminates the need for separate support plates and reduces overall component count. This nesting approach reduces weight while maintaining structural integrity through the compact, integrated design.
3Stability of the object's composition
If multiple components are overlapped and welded together to achieve precise positioning, then the structural integrity is improved, but strain from welding increases
Solution Approach 1:
The patent integrates the supporting part and flexure part into a single structure, eliminating the need for welding between separate support plates and flexure parts. This merging reduces the number of welding joints and associated strain, while structural integrity is maintained through the integrated design and strategic welding only where necessary.
Solution Approach 2:
By nesting piezoelectric elements within the supporting part and integrating the flexure part, the patent reduces the number of separate components requiring welding. This nested configuration minimizes welding joints and associated strain, while maintaining structural integrity through the unified design.
4Measurement precision
If multiple components are overlapped and welded together to achieve precise positioning, then the positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges the supporting part and flexure part into a single integrated structure, and combines piezoelectric elements within the supporting part. This merging reduces the number of separate components and assembly steps, simplifying the device while maintaining positioning accuracy through the integrated design.
Solution Approach 2:
By nesting piezoelectric elements within the supporting part structure and integrating the flexure part, the patent reduces the number of separate components and assembly operations. This nested configuration simplifies the device structure and manufacturing process while maintaining precise positioning capability.
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 reduces the thickness and weight of the magnetic head suspension, prevents strain from welding, and enhances the floating posture and vibration characteristics by allowing for efficient micro-motion of the magnetic head slider.
Implementation Method 1
paired right and left piezoelectric elements that are attached to the supporting part, so as to be symmetrical with each other with respect to a suspension longitudinal center line and have expansion and contraction directions different from each other
Data Source
AI summary
A flexure metal plate includes distal and proximal end side-center-support plate forming regions that are positioned on distal and proximal sides within an open section. To a distal end section of a supporting part that is positioned on a distal side of the open section, first and second-distal side-metal plates are fixed so as to be positioned on an outer side of the distal end side-center-support plate forming region in a width direction, and to a proximal end section of the supporting part that is positioned on a proximal side of the open section, first and second-proximal side-metal plates are fixed so as to be positioned on an outer side of the proximal end side-center-support plate forming region in the width direction. The first and second-distal side-metal plates form a distal end side-support plate in cooperation with the distal end side-center-support plate forming region.