Laptop Memory Card Power Control via Cover Detection
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Solution Overview
Problem
Laptop-type personal computers powered by both AC adaptors and battery packs face challenges in safely unloading memory cards, such as SIM cards, without disrupting operations or risking data loss, as existing methods require powering off the device, which is inconvenient and potentially damaging.
Innovation Solution
A laptop-type personal computer configuration that includes a memory card loader, a cover mechanism, and a detector to control power supply to the memory card, allowing safe unloading even when powered by an AC adaptor or battery pack by pinpoint stopping the power supply when the cover mechanism is uncovered or the battery pack is detached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SIM card loading/unloading slot is arranged such that the SIM card cannot be accessed unless the battery pack is removed, then data destruction is prevented, but user convenience deteriorates significantly
Solution Approach 1:
The power supply system is segmented into multiple independent sources (AC adaptor and battery pack), allowing selective control of power to different components. The controller can independently manage power delivery to the SIM card interface based on which power source is active, enabling safe SIM card access without requiring complete system shutdown or battery removal.
Solution Approach 2:
A cover mechanism is introduced as an intermediary physical barrier that detects when the SIM card slot is being accessed. This cover mechanism works with the controller to automatically manage power supply to the SIM card interface, providing a safe intermediate state that protects data while allowing convenient access when needed.
2Adaptability or versatility
If the laptop-type personal computer is powered by both AC adaptor and battery pack, then power flexibility is improved, but safe SIM card unloading becomes difficult
Solution Approach 1:
The power supply system implements dynamic control where the controller continuously monitors the operational state and adjusts power delivery in real-time. When a SIM card unload operation is detected, the controller dynamically shuts off power to the SIM card interface regardless of whether AC adaptor, battery pack, or both are providing power, ensuring safe card removal while maintaining overall system power flexibility.
Solution Approach 2:
The system incorporates feedback mechanisms through detectors that monitor cover mechanism position and SIM card presence. This feedback loop enables the controller to automatically adjust power supply conditions based on real-time operational state, ensuring that power is safely cut to the SIM card interface when unloading is detected, while maintaining flexible power management from multiple sources.
3Reliability
If power is completely shut off to unload the SIM card, then data protection is ensured, but system operations are disrupted
Solution Approach 1:
The power supply is segmented into separate controllable outputs, allowing the controller to selectively shut off power only to the SIM card interface while maintaining power supply to all other system components. This segmentation enables localized power control that protects SIM card data during unloading without disrupting overall system operations and productivity.
4Productivity
If the power supply to the SIM card is not stopped during unloading, then system operations continue smoothly, but data destruction risk increases
Solution Approach 1:
The system performs preliminary detection of SIM card unload conditions through the cover mechanism detector before actual unloading occurs. This preliminary action triggers the controller to proactively shut off power to the SIM card interface in advance, preventing potential data destruction during the unloading process while allowing the rest of the system to continue operating smoothly.
Data Source
AI summary
A laptop-type personal computer operable on power supplied from at least one of an AC adaptor and a battery pack includes a memory card loader configured to detachably load a memory card powered by at least one of the AC adaptor and the battery pack; a cover mechanism configured to cover and uncover the memory card loader; a detector configured to detect whether the memory card loader is covered by the cover mechanism; and a controller configured to control the power supply to a memory card loaded on the memory card loader when the cover mechanism uncovers the memory card loader.