Memory Card Terminal Recesses for Stable Power
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Solution Overview
Problem
Existing memory cards face challenges in optimizing area usage and ensuring stable power supply while maintaining compact size and fast storage speed, with issues like electrical contact defects due to misalignment and tolerance in terminal connections.
Innovation Solution
The memory card design features a substrate with strategically arranged terminals, including power and data terminals, and recess areas on the terminal surfaces to facilitate stable electrical connections, reducing misalignment and escape of socket pins, and incorporating a card detection terminal for accurate card type identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If terminals are arranged in multiple rows on the substrate, then area efficiency is improved, but electrical contact defects occur due to misalignment and tolerance issues
Solution Approach 1:
The patent applies preliminary action by pre-forming recess areas on the terminal surfaces before assembly. These recess areas are strategically designed to guide and accommodate socket pins, ensuring proper alignment is achieved in advance of final contact. This preliminary structural preparation prevents misalignment issues that would otherwise occur during assembly, thereby maintaining both high area efficiency through multi-row terminal arrangement and reliable electrical contact.
2Volume of moving object
If the memory card is designed with compact size, then portability is improved, but stable power supply becomes difficult to maintain
Solution Approach 1:
The patent applies local quality by creating recess areas at specific locations on the terminal surfaces where power terminals are positioned. These localized structural modifications concentrate the alignment and contact assurance function at the critical power transmission points. The recess areas are strategically placed on power terminals to ensure stable electrical contact for power supply, while the rest of the compact card structure maintains its small size for portability.
3Ease of manufacture
If terminal surfaces are flat, then manufacturing is simplified, but socket pins may escape or misalign during connection
Solution Approach 1:
The patent applies preliminary action by incorporating recess areas into the terminal surface design during the manufacturing process. Rather than requiring complex post-assembly alignment procedures, the recess areas are formed as integral parts of the terminals, guiding socket pin placement before final connection is made. This preliminary structural guidance ensures precise alignment is built into the component itself, maintaining manufacturing simplicity while achieving high alignment precision.
4Productivity
If multiple terminals are densely packed, then storage capacity and speed are improved, but electrical contact defects increase due to tolerance accumulation
Solution Approach 1:
The patent applies local quality by implementing recess areas specifically on power terminals and selected data terminals within the densely packed multi-row terminal arrangement. This localized structural feature provides targeted alignment assurance at critical contact points, compensating for tolerance accumulation that occurs with high-density terminal packing. The recess areas are strategically positioned to ensure reliable contact for power and data transmission, enabling high storage capacity and speed without proportionally increasing contact defects.
Data Source
AI summary
A memory card includes a substrate, first row terminals and second row terminals. The substrate has a first pair of side edges extending in a first direction and a second pair of side edges extending in a second direction perpendicular to the first direction. The first row terminals are arranged adjacent to an insertion side edge of the substrate, the first row terminals including a first power terminal, the insertion side edge being one of the first pair of side edges. The second row terminals are arranged further from the insertion side edge than the first row terminals, the second row terminals including a second power terminal. At least one recessed terminal among the first and second row terminals includes a recess area in an exposed surface of the at least one terminal.