Earphone Battery-Wrapped PCB Layout for Compact Signal Isolation
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Solution Overview
Problem
Existing ear-clip earphones face challenges in spatial limitations of batteries on antenna assemblies and signal interference due to increased circuit elements and power requirements.
Innovation Solution
The earphone design incorporates a circuit board assembly with first and second rigid circuit boards arranged at intervals along the battery's axial direction, overlapping projections with battery surfaces, and a flexible circuit board connecting them, enhancing space utilization and integration of circuit elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large quantity of circuit elements and antenna assemblies are equipped in ear-clip earphones, then power supply requirements and functionality are met, but spatial limitations of the battery on the antenna assemblies and signal interference occur
Solution Approach 1:
The patent transitions from planar arrangement to three-dimensional spatial arrangement by overlapping projections of circuit boards along the battery's axial direction. The first rigid circuit board is arranged at the first end of the battery, the second rigid circuit board at the second end, and the flexible circuit board connects them radially, utilizing the battery's cylindrical geometry to distribute components in multiple dimensions and reduce signal interference.
Solution Approach 2:
The patent nests the circuit board assembly within the battery's projection area. The first and second rigid circuit boards are positioned such that their projections along the axial direction overlap with end surfaces of the battery, and the flexible circuit board's projection along the radial direction overlaps with the circumferential surface, effectively nesting all components within the battery's spatial envelope.
2Adaptability or versatility
If circuit elements and antenna assemblies are increased, then power supply requirements are met, but spatial volume increases
Solution Approach 1:
The patent utilizes three-dimensional space by arranging circuit boards at different positions along the battery's axial and radial directions. The overlapping projections ensure that components are distributed in multiple dimensions rather than occupying additional external volume, maintaining compact form factor while integrating more circuit elements.
Solution Approach 2:
The patent combines multiple circuit boards (first rigid, second rigid, and flexible) into a single integrated assembly that fits within the battery's projection area. This merging of multiple functional components into one compact unit increases circuit element integration without proportionally increasing overall spatial volume.
3Volume of stationary object
If circuit boards are arranged to overlap battery projections, then space utilization is improved, but assembly complexity increases
Solution Approach 1:
The patent segments the circuit board assembly into three distinct parts: first rigid circuit board, second rigid circuit board, and flexible circuit board. This segmentation allows each component to be positioned independently at optimal locations along the battery's axial and radial directions, simplifying the overall assembly process despite the three-dimensional arrangement.
Solution Approach 2:
The flexible circuit board serves multiple functions: it connects the first and second rigid circuit boards electrically and mechanically, and its radial arrangement allows it to adapt to the battery's circumferential surface. This multi-functionality reduces the need for additional components and simplifies assembly.
Data Source
AI summary
Provided is an earphone. The earphone includes a first housing assembly configured to form an accommodation cavity, a battery, and a circuit board assembly, the battery and the circuit board assembly being disposed in the accommodation cavity. The circuit board assembly includes a first rigid circuit board, a second rigid circuit board, and a first flexible circuit board, the first rigid circuit board and the second rigid circuit board are arranged at intervals at two ends of the battery along an axial direction of the battery, a projection of the first rigid circuit board and a projection of the second rigid circuit board along the axial direction of the battery at least partially overlap with an end surface of the battery, and a projection of the first flexible circuit board along a radial direction of the battery at least partially overlaps with a circumferential surface of the battery.