Magnetic Case Plate Layout for Wireless Charging Compatibility
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Solution Overview
Problem
Magnetic mounts for electronic devices can impede wireless charging due to the metal plate blocking electromagnetic fields.
Innovation Solution
A metal plate with a rounded concave edge is designed to allow magnetic retention without overlapping with the receiver coil, ensuring wireless charging is not impeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a metal plate is used for magnetic retention, then magnetic attachment strength is improved, but wireless charging capability deteriorates due to electromagnetic field blocking
Solution Approach 1:
The metal plate is segmented into multiple separate magnetic retention members distributed across the plate surface, rather than using a single solid metal plate. This segmentation allows electromagnetic fields to pass through the gaps between members, maintaining wireless charging capability while providing sufficient magnetic retention force through the distributed members.
Solution Approach 2:
Different regions of the metal plate have different properties: areas with magnetic retention members provide magnetic attachment, while gaps and openings in the plate structure allow electromagnetic field penetration for wireless charging. The plate incorporates both magnetic and non-magnetic zones to simultaneously satisfy both functions.
2Force
If a solid metal plate is used, then magnetic retention is improved, but ease of operation deteriorates due to removal requirements for charging
Solution Approach 1:
The metal plate is divided into multiple separate magnetic retention members that are distributed across the plate. This segmentation allows the plate to maintain magnetic retention while enabling wireless charging through the gaps, eliminating the need to remove the plate for charging operations.
3Force
If a metal plate is positioned to enable magnetic attachment, then magnetic retention is improved, but wireless charging reliability deteriorates due to field blocking
Solution Approach 1:
The metal plate incorporates multiple separate magnetic retention members with gaps between them, allowing electromagnetic fields to pass through the plate structure during wireless charging while maintaining magnetic retention capability when needed.
Solution Approach 2:
The plate design creates local variations in magnetic properties, with concentrated magnetic retention members in specific areas and open or less dense regions in other areas to allow electromagnetic field penetration, enabling both functions to coexist.
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
The metal plate enables magnetic attachment of the case to a support while maintaining effective wireless charging, allowing charging from various orientations and positions without interference.
Implementation Method 1
The metal plate is constructed to enable magnetic retention or attachment of the case to a support having a magnet
Implementation Method 2
Wireless charging uses an electromagnetic field to transfer energy between two objects through electromagnetic induction
Data Source
AI summary
A case for an electronic device wherein the electronic device has a receiver coil for wireless charging and the receiver coil is formed in between an inner circle and an outer circle, includes: a hard protective frame constructed to receive the electronic device therein wherein the hard protective frame faces the electronic device; and a metal plate constructed to be received in the recess. The metal plate is constructed to enable magnetic retention or attachment of the case to a support having a magnet. The metal plate has a rounded concave edge, and the metal plate does not overlap with the inner circle. Preferably, the rounded concave edge, the inner circle, and the outer circle are substantially symmetrical with respect to a same line.