Wearable Antenna Housing With Insulated Spring Bar Isolation
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Solution Overview
Problem
Conventional wearable devices with metal watch cases used as antennas suffer from reduced antenna performance due to electrical connection with metal watchbands, affecting signal transmission and reception.
Innovation Solution
A wearable device design featuring a housing made of insulating material with embedded conductive components, avoiding direct contact with spring bar shafts to maintain antenna integrity and performance, and utilizing a conductive component as an antenna to enhance signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a metal housing is used as an antenna, then antenna integration is achieved, but antenna performance deteriorates due to electrical connection with metal watchband
Solution Approach 1:
An insulating layer is introduced between the metal housing and the spring bar shaft to prevent direct electrical connection. This intermediary layer blocks the harmful electrical path while allowing mechanical connection, thus maintaining antenna performance while keeping the metal housing structure.
Solution Approach 2:
The housing structure combines metal material for mechanical strength with an insulating material layer for electrical isolation. This composite structure allows the housing to serve both structural and antenna functions without the detrimental electrical connection to the metal watchband.
2Shape
If a seamless design is used for the metal watch case, then aesthetic appearance is improved, but antenna performance deteriorates due to continuous metal structure
Solution Approach 1:
The insulating layer is applied locally at specific positions where electrical connection occurs (between housing and spring bar shaft), rather than compromising the overall seamless design. This allows the housing to maintain its aesthetic appearance while preventing harmful electrical connections at critical points.
3Strength
If metal spring bar shaft is used to connect spring bars, then mechanical strength is improved, but antenna performance deteriorates due to electrical connection
Solution Approach 1:
The insulating layer acts as a mediator that allows the metal spring bar shaft to maintain its mechanical strength for connecting spring bars, while simultaneously preventing electrical connection to the antenna circuit. The insulating layer is positioned between the shaft and the housing to block the electrical path.
4Reliability
If conductive component is exposed on spring bar, then antenna function is achieved, but signal interference increases due to contact with spring bar shaft
Solution Approach 1:
The insulating layer serves as a protective intermediary that allows the conductive component to perform its antenna function while preventing direct contact with the metal spring bar shaft. This isolation eliminates signal interference while maintaining antenna functionality.
Solution Approach 2:
The potential harmful effect of the metal spring bar shaft is converted into a benefit by using the insulating layer to create a controlled electrical isolation. The shaft's mechanical function is preserved while its harmful electrical connection effect is eliminated, turning a potential problem into a solved issue.
Data Source
AI summary
Embodiments of this application disclose a wearable device. The wearable device includes a wearable device body and a housing that covers the wearable device body. The housing is made of an insulating material, the housing includes at least two spring bars, two spring bars are arranged in parallel and spaced from each other and both extend in a same direction, a connection line between ends of the two spring bars is located outside the wearable device, and a conductive component is disposed on the spring bar. The wearable device body includes a mainboard, the mainboard is configured to feed power to the conductive component, and the conductive component is used as an antenna.