Mobile Case Magnetic Chassis for Non-Planar Phone Backs
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Solution Overview
Problem
Existing mobile device cases with magnetic attachment features are ineffective due to the non-planarity of newer smartphone designs, which disrupt stable magnetic coupling to vertical or near-vertical surfaces, and often expose the power port, leading to discomfort and dirt accumulation.
Innovation Solution
A protective case with a housing made of dual materials (TPU and polycarbonate) featuring elastomeric grips, a digit cushion, a lens ring, floating magnetic chassis, and a kickstand, along with a finger loop and magnet arrangements that accommodate non-planar designs for stable magnetic attachment and enhanced user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic attachment mechanisms are used to attach the phone case to vertical surfaces, then the device can be securely mounted, but the non-planar camera lens requirements disrupt stable magnetic coupling
Solution Approach 1:
The magnetic attachment system is segmented into multiple independent magnetic components distributed across the case surface rather than relying on a single large magnet. This segmentation allows the magnetic force to be applied at multiple locations, compensating for the non-planar lens structure and maintaining stable attachment to vertical surfaces despite the camera protrusion
Solution Approach 2:
The magnetic chassis is designed to extend in the vertical dimension (z-axis) beyond the phone case surface, creating a floating magnetic attachment layer. This dimensional extension allows the magnetic components to reach past the camera lens protrusion and establish contact with vertical surfaces, effectively ignoring the non-planar obstacle in the horizontal plane
2Ease of operation
If the case design exposes the power port for accessibility, then user convenience is improved, but discomfort and dirt accumulation occur
Solution Approach 1:
A flexible elastomeric liner is introduced as a thin film layer that covers the power port while maintaining flexibility. This liner can be shaped to conform to the power port geometry, providing protection against dirt and discomfort while preserving the ability to access the power port when needed, thus resolving the contradiction between accessibility and protection
3Adaptability or versatility
If a kickstand is added for vertical viewing, then functionality is enhanced, but device complexity increases
Solution Approach 1:
The kickstand mechanism is merged with the magnetic chassis assembly, combining the viewing angle adjustment function with the magnetic attachment function in a single integrated structure. This merging allows the kickstand to be positioned and secured using the same magnetic forces that attach the case to vertical surfaces, enhancing versatility while minimizing the increase in overall device complexity
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 case provides stable magnetic coupling to non-planar surfaces, protects the device and power port, and enhances user comfort and functionality with a versatile kickstand and ergonomic design, while maintaining wireless charging efficiency.
Implementation Method 1
magnet arrangements that accommodate non-planar designs for stable magnetic attachment
Data Source
AI summary
A protective case for a mobile device. A housing defines a recess to receive the mobile device. A kickstand and/or a finger loop are provided and configured to avoid increasing the maximum thickness of the case necessitated by the lens structure of the mobile device.