Watch Casing Resin Cover Structure for Antenna and Durability
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Solution Overview
Problem
Conventional electronic devices face issues where the device casing and exterior have different colors and materials, leading to impaired design characteristics when exposed, and the device casing may affect antenna sensitivity and durability.
Innovation Solution
A cylindrical device casing made of resin is surrounded by a resin member, including a bezel, back cover, and decorative components, which prevents the casing from being exposed and enhances antenna performance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the device casing is made of metal or resin and a back cover is attached, then the device can be assembled, but the design characteristics are impaired when the casing is exposed
Solution Approach 1:
The patent merges the device casing and the covering member into a single integrated structure. The resin member is formed to extend along the circumferential direction and overlap with the device casing in the axial direction, creating a unified appearance that eliminates the exposed edges of the casing while maintaining assembly capability.
Solution Approach 2:
The resin member extends in multiple dimensions - along the circumferential direction and in the axial direction - to completely cover the device casing. This multi-dimensional extension ensures that no part of the casing is exposed from any angle, resolving the design characteristic issue while maintaining functionality.
2Strength
If the device casing is made of metal, then strength and durability are improved, but antenna sensitivity may be affected
Solution Approach 1:
The patent uses a composite structure combining a resin member with the device casing. The resin member provides durability and impact resistance while being electrically insulating, thus not interfering with antenna sensitivity. This composite approach allows the device to achieve both strength and good antenna performance.
3Reliability
If the device casing is made of resin, then antenna sensitivity is maintained, but resistance to impact and water pressure is reduced
Solution Approach 1:
The patent creates a composite structure where the resin member serves dual purposes: maintaining antenna sensitivity through electrical insulation while providing enhanced mechanical strength and water resistance through its structural design. The resin member's extension along the circumferential and axial directions creates a protective barrier that improves both antenna performance and durability.
4Shape
If the resin member extends along the circumferential direction and overlaps in the axial direction, then the device casing is completely covered, but the structure becomes more complex
Solution Approach 1:
The resin member is designed as an integrated component that combines multiple functions: covering the casing, providing structural support, ensuring water resistance, and maintaining antenna performance. This merging of functions into a single component reduces overall structural complexity while achieving complete coverage of the device casing.
Data Source
AI summary
An electronic device includes: a cylindrical device casing that houses a module; and a resin member provided on an outside of the device casing. The resin member prevents at least a circumferential surface and a bottom surface side of the device casing from being exposed outside.