Speaker Flexible Circuit Structure for High-Frequency Vibration Durability
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Solution Overview
Problem
Existing speakers suffer from coil or flexible circuit board damage due to prolonged high-frequency vibrations during sound production.
Innovation Solution
A speaker structure design that includes a magnetic conductive carrier plate, outer frame, and vibration assembly with varying thicknesses of outer, connecting, and inner fixed racks in the flexible circuit unit to enhance structural strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker operates at high-frequency vibrations for prolonged periods, then sound quality is improved, but the coil or flexible circuit board is damaged
Solution Approach 1:
The flexible circuit unit employs a multi-layer structure with varying thicknesses: the outer fixed rack has greater thickness than the connecting rack, which in turn has greater thickness than the inner fixed rack. This gradient thickness design provides localized reinforcement where needed while maintaining flexibility in other areas, enabling the structure to withstand high-frequency vibrations without damage
Solution Approach 2:
The flexible circuit unit is constructed as a composite structure comprising multiple racks (outer fixed rack, connecting rack, inner fixed rack) with different thicknesses and material properties. This composite design combines the strength of thicker outer structures with the flexibility of thinner inner structures, creating a resilient assembly that resists vibration-induced damage
2Strength
If the thickness of the flexible circuit unit is increased to enhance durability, then structural strength is improved, but device complexity increases
Solution Approach 1:
The flexible circuit unit is divided into three distinct rack segments (outer fixed rack, connecting rack, inner fixed rack) with different thicknesses. Each segment serves a specific structural function, allowing the design to achieve high strength through strategic thickness variation rather than uniformly increasing the thickness of the entire circuit unit, thus managing complexity through functional segmentation
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 design extends the service life of the flexible circuit unit by maintaining structural integrity under high-frequency vibrations, reducing damage and ensuring stable sound production.
Implementation Method 1
the voice coil locates within the magnetic gap area
Data Source
AI summary
A speaker structure includes a magnetic conductive carrier plate, a magnetic assembly, an outer frame and a vibration assembly. The magnetic assembly locates on the magnetic conductive carrier plate and forms a magnetic gap area. The outer frame locates on the magnetic assembly. The vibration assembly includes a flexible circuit unit, a vibrating unit and a voice coil. The flexible circuit unit includes an outer fixed rack, a connecting rack and an inner fixed rack. The thickness of the outer fixed rack is greater than connecting rack. The thickness of the connecting rack is greater than inner fixed rack. The flexible circuit unit locates on the magnetic assembly. The outer fixed rack disposes on the outer frame. The voice coil disposes on the inner fixed rack of the flexible circuit unit. The voice coil locates within the magnetic gap area. The vibrating unit disposes on the flexible circuit unit.