Protective Case Magnetic Component Retention via Coating
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Solution Overview
Problem
Existing electronic device protective cases with embedded magnetic pieces face challenges in maintaining a thin and aesthetically pleasing design while ensuring the magnetic components remain securely embedded and resistant to bending and exposure.
Innovation Solution
The solution involves a protective case design with a decorative layer and a functional layer, where the outer surface of the decorative layer is coated with a waterproof and sweat-proof agent, and the inner surface of the functional layer is coated with a material like polyester or epoxy to prevent the magnetic piece from being pushed out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If magnetic pieces are embedded in the protective case to enable magnetic charging, then wireless charging functionality is achieved, but the case thickness increases making it difficult to maintain a thin design
Solution Approach 1:
The magnetic piece is nested within a blind groove cavity in the protective case rather than being surface-mounted. This nesting approach allows the magnetic component to be housed within the case thickness, achieving wireless charging functionality while maintaining a thin overall case profile.
Solution Approach 2:
The protective case uses a flexible material structure with a blind groove that can accommodate the magnetic piece without requiring significant thickness. The case material and groove design allow for thin-film construction while still providing adequate housing for the magnetic component.
2Length of moving object
If the protective case is made thin by directly opening a blind groove and adhering the magnetic piece, then the case appears thin and light, but the magnetic piece can be pushed out and fall out during bending
Solution Approach 1:
The blind groove is designed with a curved bottom surface rather than a flat bottom. This curvature creates a mechanical interlock effect where the magnetic piece sits in the curved recess, making it difficult to dislodge during bending or handling while maintaining case thinness.
Solution Approach 2:
The blind groove structure is pre-designed to provide resistance against the magnetic piece being pushed out. The groove geometry creates preliminary mechanical constraints that prevent the magnetic piece from being dislodged during normal use, bending, or installation/removal operations.
3Reliability
If a layer of flannel is attached over the magnetic piece to prevent it from falling out, then magnetic piece retention is improved, but the case thickness increases making it look bulky
Solution Approach 1:
The protective case utilizes a thin-film blind groove structure that provides magnetic piece retention without requiring additional thick layers like flannel. The groove itself acts as the retaining mechanism, maintaining case thinness while preventing magnetic piece dislodgement.
Data Source
AI summary
A protective case for electronic equipment has a decorative layer, a functional layer, and a magnetic component inserted into the functional layer. A coating applied to the functional layer retains the magnetic component during removal of an electronic device or piece of equipment from the case. The functional layer may have a thickness that is substantially equivalent to the thickness of the magnetic component. A coating applied to the decorative layer may provide water resistance and prevent fingerprints on the case. Methods of fabricating a protective case for electronic equipment include a spraying method as well as a hot press forming method.