Tablet Magnetic Docking With Rotational Release Alignment
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Solution Overview
Problem
Existing methods for coupling and decoupling tablet information handling systems from wireless chargers face challenges in achieving sufficient magnetic attraction for secure charging while allowing easy separation, as they often require excessive force for detachment.
Innovation Solution
The system employs opposing sets of spaced magnets in both the tablet information handling system and the wireless charger housing, which align for maximum attraction in portrait or landscape orientations and partially align with spaces when rotated, reducing magnetic force for easy separation, along with a Hall sensor to detect the rotational orientation and indicate reduced attraction for user guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic attraction is increased to secure the tablet to the charger, then coupling stability is improved, but separation force becomes excessive
Solution Approach 1:
The magnetic coupling system is segmented into multiple independent magnets distributed around the wireless charging receiver. Each magnet contributes to the overall coupling force, allowing the system to achieve stable attachment while enabling easier separation through rotational misalignment of individual magnetic segments.
Solution Approach 2:
The magnetic attraction force is made dynamic through rotational orientation. When the tablet is rotated to a specific angle, the magnets misalign with their counterparts on the charger, dynamically reducing the magnetic attraction force and enabling easy separation without requiring excessive pull force.
2Ease of operation
If magnetic force is reduced for easy separation, then ease of operation is improved, but coupling stability deteriorates
Solution Approach 1:
The magnetic coupling system employs asymmetric positioning of magnets and corresponding spaces. The non-uniform distribution creates strong coupling in the charged orientation while providing natural misalignment and reduced attraction in rotated orientations, enabling easy separation. The Hall sensor detects this asymmetric magnetic field change to provide user feedback.
3Force
If magnets are positioned for maximum attraction, then coupling strength is improved, but rotational freedom is restricted
Solution Approach 1:
The Hall sensor acts as an intermediary that detects the magnetic field orientation and provides feedback to the user. It monitors when the magnets are properly aligned for maximum attraction during charging and when rotation has occurred, enabling the system to maintain coupling strength while allowing intentional rotational separation.
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 solution allows for secure coupling and easy decoupling of the tablet from the charger, providing a firm writing surface during use and reducing the separation force required, ensuring efficient and convenient charging and use.
Implementation Method 1
A set of spaced magnets disposed around the wireless charging receiver magnetically attracts the planar housing to a charger housing
Implementation Method 2
A Hall sensor disposed in a space detects increased magnetic flux in the offset orientation as an opposing magnet aligns with the space by rotation
Data Source
AI summary
A tablet information handling system selectively couples to a charging stand and charging dock with opposing sets of spaced magnets to have magnetic attraction hold a wireless charging receiver aligned with a wireless charger. Magnetic attraction is greatest when the tablet information handling system couples in a landscape or portrait orientation and is reduced for removal of the tablet information handling system by rotating to an offset orientation so that magnets align with opposing spaces, resulting in a reduced magnetic attraction. A sensor disposed in a space detects the offset rotation by detecting the increased magnetic flux of the magnet aligning with the space so that a user interface can provide an end user with an indication that the tablet information handling system is positioned for separation from the charging stand or charging dock.