Card Insulator with Linear Slits for Component Height Conformance
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Solution Overview
Problem
Existing card insulators for printed circuit boards in hard disk drives deform or bow when accommodating components of varying heights, compromising electrical insulation and protection against accidental shorting.
Innovation Solution
A thin insulative sheet with simple linear slits that extend completely through the sheet, allowing for flexible linear bends to conform to component heights without buckling or bowing, ensuring continuous insulation between components and the base casting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thin flat insulative sheet is used to insulate components from the enclosure, then electrical insulation is provided, but the sheet bows or deforms when components have varying heights
Solution Approach 1:
The insulative sheet is segmented with linear slits that divide the continuous sheet into sections. These slits allow the sheet to flex and conform to varying component heights without compromising the overall insulative barrier, preventing bowing while maintaining electrical insulation integrity.
Solution Approach 2:
The physical structure of the insulative sheet is modified by introducing linear slits, which changes its mechanical parameters (flexibility, conformability) while maintaining its electrical insulative properties. This allows the sheet to adapt to varying component heights without deformation.
2Shape
If holes are provided in the insulator sheet to accommodate tall components, then the card bowing problem is solved, but the insulative purpose is defeated
Solution Approach 1:
Instead of creating open holes that compromise insulation, the sheet is segmented with linear slits that maintain the continuous insulative material. The slits allow vertical flexing to accommodate tall components while the insulative material remains intact, preventing electrical shorting.
Solution Approach 2:
The solution moves from a two-dimensional planar insulator to a three-dimensional flexible structure with linear slits. This dimensional adaptation allows the insulator to conform vertically to component heights while maintaining its insulative function, solving both accommodation and insulation requirements.
3Adaptability or versatility
If the insulator sheet is made flexible to conform to component heights, then accommodation is improved, but buckling and card bowing occur
Solution Approach 1:
The linear slits segment the insulative sheet in a controlled manner, allowing localized flexing at the slit locations while the overall sheet structure remains stable. This segmentation enables height conformance without uncontrolled buckling or card bowing.
Solution Approach 2:
The insulative sheet has non-uniform local properties due to the linear slits, which create zones of increased flexibility at the slit locations while maintaining structural stability in the solid material regions. This local quality differentiation allows controlled conformance to component heights.
Data Source
AI summary
A card insulator is formed with slits that conform to height changes required by the components mounted to a card. The insulative sheet has simple linear slits that extend completely through the sheet and allow the insulator to deform with simple linear bends when contacted by the tall components mounted to the card. The linear bends allow the surface of the deformed insulator to be flexible without buckling the insulator and without bowing the card.