Earphone Battery-Antenna Layout for Space and Signal Isolation
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Solution Overview
Problem
Current earphones with large battery volumes and antenna assemblies face spatial constraints and signal interference issues due to their configuration.
Innovation Solution
The earphone design includes a battery and antenna assembly spaced apart along the axial direction of the battery, with overlapping projections of the antenna sections on the battery's end surface, and a flexible connecting board to integrate the RF unit and ground points, optimizing space utilization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery volume is increased to meet power supply requirements, then the power supply capacity is improved, but the spatial constraints on the antenna assembly and signal interference worsen
Solution Approach 1:
The patent applies dimensional change by transitioning from a planar layout to a three-dimensional spatial arrangement. The antenna assembly is positioned at the end surface of the battery along the axial direction, with its projection overlapping the battery's end surface. This vertical stacking approach utilizes the Z-axis dimension, allowing both the large-volume battery and the antenna assembly to coexist without significant signal interference, as the axial separation creates sufficient electromagnetic isolation while maintaining compact overall dimensions.
2Use of energy by moving object
If the battery volume is increased to meet power supply requirements, then the power supply capacity is improved, but the spatial arrangement constraints worsen
Solution Approach 1:
The patent implements nesting by placing the antenna assembly within the projection area of the battery's end surface. The antenna assembly is positioned such that its projection along the axial direction overlaps with the battery's end surface, effectively nesting the antenna structure within the battery's spatial envelope. This allows the antenna assembly to utilize the vertical space above or below the battery without increasing the radial dimensions, achieving compact integration despite the large battery volume.
3Volume of moving object
If the antenna assembly is placed close to the battery, then the space utilization is improved, but the signal interference from the battery increases
Solution Approach 1:
The patent applies local quality by creating a differentiated spatial arrangement where the antenna assembly is positioned at a specific location (end surface of battery along axial direction) with specific orientation (projections overlapping). This localized positioning strategy provides sufficient electromagnetic isolation through axial separation while maintaining compact overall dimensions. The local quality of the arrangement - specifically the axial spacing and projection overlap - enables simultaneous achievement of high space utilization and adequate signal isolation.
Data Source
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AI summary
An earphone includes a first housing assembly configured to form an accommodating cavity, and a battery and a circuit board assembly provided in the accommodating cavity. The battery is configured in a columnar shape. The circuit board assembly includes a first rigid circuit board, a second rigid circuit board, and a first flexible circuit board. Along an axial direction of the battery, the first rigid circuit board and the second rigid circuit board are spaced apart at two ends of the battery. The first flexible circuit board connects the first rigid circuit board and the second rigid circuit board. Projections of the first rigid circuit board and the second rigid circuit board along the axial direction of the battery at least partially overlap an end surface of the battery. A projection of the first flexible circuit board along a radial direction of the battery at least partially overlaps a peripheral surface of the battery.