Earphone High-Frequency Speaker With Flat Ring Coil Layout
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Solution Overview
Problem
Conventional high-frequency speakers have a cylindrical coil structure that increases the overall size and limits the diaphragm size, restricting high-frequency sound reproduction.
Innovation Solution
The high-frequency coil is configured as a plate-shaped ring structure with a flexible substrate outside the coil, and the magnets are arranged with opposite polarities to maximize magnetic flux and minimize speaker height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical high-frequency coil structure is used, then the coil can be easily manufactured, but the overall size of the high-frequency speaker increases
Solution Approach 1:
The patent transitions from a conventional cylindrical coil structure to a plate-shaped ring structure, changing the geometric dimensionality. This dimensional change allows the coil to achieve the necessary electrical connectivity while occupying less vertical space, thereby reducing the overall speaker size without compromising manufacturing feasibility.
Solution Approach 2:
The coil is divided into multiple turns arranged in a plate-shaped ring structure rather than a single cylindrical form. This segmentation of the coil into discrete turns within a planar arrangement enables more efficient space utilization and reduces the vertical profile of the speaker assembly.
2Area of moving object
If the flexible substrate is disposed inside the high-frequency diaphragm, then the diaphragm size can be maximized, but the electrical connection to the high-frequency coil becomes complex
Solution Approach 1:
Instead of placing the flexible substrate inside the diaphragm assembly, the patent inverts the arrangement by positioning the substrate outside the high-frequency coil. This inversion simplifies the electrical connection path while still allowing the diaphragm to achieve its optimal size, as the substrate can be routed externally without constraining the diaphragm's internal structure.
Solution Approach 2:
The flexible substrate acts as an intermediary element that bridges the electrical connection between the coil and external circuitry. By positioning it outside the coil assembly, it serves as a convenient routing path for electrical connections without interfering with the diaphragm's movement or structural integrity.
3Volume of moving object
If the diaphragm size is limited, then the speaker structure remains compact, but the high-frequency sound reproduction is constrained
Solution Approach 1:
The patent employs a plate-shaped ring coil structure that optimizes the spatial arrangement of components. This dimensional change in the coil geometry allows the diaphragm to be positioned and sized to maximize its surface area for sound production while keeping the overall speaker footprint compact, thereby improving high-frequency sound reproduction without proportionally increasing speaker size.
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
This configuration reduces the speaker's overall size while enhancing high-frequency sound performance and expanding the diaphragm size for improved sound output.
Implementation Method 1
When current is applied to the coil, the coil becomes magnetic, and the electrical interaction between the coil and the plate causes the coil to move, causing the diaphragm to move
Implementation Method 2
an inner magnet disposed above a central portion of the high-frequency yoke; an outer magnet disposed above the high-frequency yoke and disposed outside the inner magnet; The inner magnet and the outer magnet are arranged to have opposite polarities
Data Source
AI summary
Provided is a high-frequency speaker for earphones, including: a speaker housing; a high-frequency yoke disposed in a lower part of the speaker housing; a ventilation membrane disposed beneath the high-frequency yoke to adjust an amount of air ventilation; an inner magnet disposed above a central portion of the high-frequency yoke; an outer magnet disposed above the high-frequency yoke and disposed outside the inner magnet; a high-frequency coil having a plate-shaped ring structure and disposed above the inner magnet and the outer magnet to extend over the inner magnet and the outer magnet; a flexible substrate disposed outside the high-frequency coil and providing an electric signal to the high-frequency coil; and a high-frequency diaphragm disposed above the high-frequency coil and outputting high-frequency sound.