Wireless Charging Case Layout for Magnetic Mount Compatibility
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Solution Overview
Problem
Magnetic mounts for electronic devices often interfere with wireless charging by blocking the electromagnetic field, preventing the device from charging properly.
Innovation Solution
A metal plate with a rounded concave edge is designed to allow magnetic attachment to a support without overlapping with the receiver coil, ensuring that wireless charging can occur without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a metal plate is used for magnetic mounting, then magnetic retention is improved, but wireless charging is impeded
Solution Approach 1:
The metal plate is segmented into a first metal plate and a second metal plate positioned at different locations. This segmentation allows the electromagnetic field to pass through gaps between the plates, reducing blocking while maintaining magnetic retention force through the combined effect of both plates.
Solution Approach 2:
A non-metallic case structure serves as an intermediary between the metal plate and the electronic device. The case allows the electromagnetic field to pass through while providing structural support, and the metal plate is positioned within the case rather than directly contacting the device, reducing electromagnetic interference.
2Adaptability or versatility
If a metal plate is attached to the case, then magnetic mounting is enabled, but wireless charging efficiency decreases
Solution Approach 1:
The metal plate is designed with specific local characteristics including rounded concave edges and positioning that creates localized magnetic retention zones. The plate's geometry is optimized to concentrate magnetic force at edges while minimizing electromagnetic field blocking in the center area where wireless charging occurs.
Solution Approach 2:
The solution moves from a single flat metal plate to a multi-dimensional arrangement with the first and second metal plates at different positions and orientations. This dimensional change allows the electromagnetic field to pass through spaces between plates while maintaining magnetic retention through the distributed plate structure.
3Force
If the metal plate covers the receiver coil area, then magnetic retention is maximized, but electromagnetic field transmission is blocked
Solution Approach 1:
The metal plate is divided into multiple segments (first and second metal plates) positioned at different locations. This segmentation reduces the continuous metal area that blocks electromagnetic fields while distributing magnetic retention force across multiple points, maintaining effectiveness without complete coverage.
Solution Approach 2:
The metal plate features asymmetric geometry with rounded concave edges and irregular positioning rather than symmetric full-coverage placement. This asymmetric design creates gaps and non-uniform distribution that allow electromagnetic field transmission paths while maintaining magnetic retention at critical edge locations.
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 retention of the case while allowing for effective wireless charging, as it does not impede the electromagnetic field, allowing users to charge their devices without removing the plate, regardless of its orientation or position.
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.