Metal Watch Frame Antenna Structure With Insulating Isolation
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Solution Overview
Problem
The challenge of improving antenna performance in electronic devices, particularly smartwatches, is exacerbated by seamless metal watch cases that affect multi-band antenna performance due to differing signal frequency bands, while plastic cases compromise appearance and texture.
Innovation Solution
A middle frame assembly with a metal appearance layer and insulating structure layer, where the appearance layer serves as an antenna radiator, and the structure layer provides insulation and clearance, using nano molding technology for a waterproof interface and sealing members to enhance antenna performance and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a seamless metal watch case is used, then appearance effect and texture are improved, but antenna performance deteriorates due to signal interference from metal components
Solution Approach 1:
The watch case is segmented into two distinct layers: a metal appearance layer providing aesthetic quality and an insulating structure layer providing electrical isolation. This segmentation allows each layer to fulfill its specific function without compromising the other, resolving the contradiction between appearance and antenna performance.
Solution Approach 2:
The patent employs a composite structure combining metal and insulating materials in a layered configuration. The metal appearance layer delivers the desired aesthetic effect while the insulating structure layer prevents signal interference, achieving both appearance quality and antenna performance through material composition.
2Reliability
If a plastic watch case with laser direct structuring antenna is used, then antenna performance is improved, but appearance effect and texture deteriorate
Solution Approach 1:
The watch case is segmented into two distinct layers: a metal appearance layer providing aesthetic quality and an insulating structure layer providing electrical isolation. This segmentation allows each layer to fulfill its specific function without compromising the other, resolving the contradiction between appearance and antenna performance.
Solution Approach 2:
The patent employs a composite structure combining metal and insulating materials in a layered configuration. The metal appearance layer delivers the desired aesthetic effect while the insulating structure layer prevents signal interference, achieving both appearance quality and antenna performance through material composition.
3Device complexity
If metal components are placed close to the antenna in the accommodation cavity, then device complexity is reduced, but antenna performance deteriorates due to signal interference
Solution Approach 1:
The insulating structure layer acts as an intermediary between the metal appearance layer and the antenna/metal components in the accommodation cavity. This intermediate layer provides electrical isolation and maintains required clearance, preventing signal interference while allowing compact device design.
Solution Approach 2:
The patent employs a composite structure combining metal and insulating materials in a layered configuration. The metal appearance layer delivers the desired aesthetic effect while the insulating structure layer prevents signal interference, achieving both appearance quality and antenna performance through material composition.
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 solution ensures good antenna performance, appearance, and texture while improving waterproofing, reducing assembly complexity, and lowering processing costs.
Implementation Method 1
The structure layer is an insulating structure layer... so that the metal appearance layer can be isolated from the metal component of the battery assembly and the control assembly
Implementation Method 2
The connection portion is disposed on the inner wall of the appearance layer, and the connection portion is electrically connected to the circuit board of the control assembly, so that a current on the circuit board can be guided into the appearance layer
Data Source
AI summary
An electronic device includes a panel assembly, a middle frame assembly, and a bottom case assembly. The middle frame assembly includes a metal appearance layer and an insulating structure layer. At least one connection portion that extends toward the inside of the accommodation cavity is disposed on an inner wall of the metal appearance layer. The structure layer is disposed on the inner wall of the metal appearance layer, and the battery assembly is fastened to the structure layer. A mounting portion that fits with the connection portion is disposed on the structure layer, one end of the connection portion penetrates into the mounting portion, and the other end is exposed from the mounting portion. A circuit board of the control assembly is fastened and electrically connected to a part that is of the connection portion and that is exposed from the mounting portion.