Coaxial Earphone Core With Nested Dual Sound Units for Lower Axial Height
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earphone cores with single magnet systems struggle to provide high-frequency sound effects while maintaining low-frequency and mid-frequency performance, leading to increased axial height and reduced effective vibration area, which compromises sound quality and manufacturing convenience.
Innovation Solution
A coaxial earphone core design with a first and second sound unit, each with its own coil and diaphragm, utilizing a magnet system with a first and second yoke and magnetic gaps to optimize space utilization, reducing axial height, and ensuring adequate vibration area for improved sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two magnet systems are stacked to provide high-frequency sound effect, then high-frequency sound quality is improved, but the axial height of the earphone increases, reducing manufacture convenience and applicability
Solution Approach 1:
The patent implements a nested structure where the second sound unit is placed inside the first sound unit. The second diaphragm is positioned on one side of the first diaphragm facing the magnet system, allowing both sound units to occupy overlapping spatial volumes. This nesting approach enables dual-frequency sound reproduction without simply stacking magnet systems axially, thus avoiding the height increase problem while maintaining comprehensive sound quality coverage including high-frequency response
2Volume of moving object
If the diaphragm of one vibration system surrounds the diaphragm of another vibration system, then space utilization is improved, but the effective vibration area of the outer diaphragm is reduced, weakening sound quality
Solution Approach 1:
The patent divides the diaphragm system into two independent diaphragms: a first diaphragm and a second diaphragm positioned on one side of the first diaphragm facing the magnet system. This segmentation allows each diaphragm to have its own dedicated vibration area without being constrained by the other's structure. The first diaphragm can be designed with sufficient vibration area for its frequency range, while the second diaphragm operates independently, eliminating the problem of reduced effective vibration area that occurs when one diaphragm surrounds another
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 achieves full-frequency sound reproduction with enhanced sound quality and manufacturing applicability by efficiently utilizing space and maintaining sufficient vibration area for each diaphragm.
Implementation Method 1
a magnet system, including: a first yoke fixed to the first frame; a first magnet fixed to the first yoke; a second magnet surrounding the first magnet to form a first magnetic gap; a second yoke fixed on one side of the first magnet away from the first yoke; an annular third magnet fixed to the second yoke
Implementation Method 2
a first coil fixed to the first diaphragm and inserted into the first magnetic gap; a second coil fixed to the second diaphragm; the second coil is inserted into the second magnetic gap
Data Source
AI summary
The present disclosure discloses a coaxial earphone core including a magnet system, which includes a first yoke, a first magnet, a second magnet surrounding the first magnet to form a first magnetic gap, a second yoke fixed to the first magnet, and an annular third magnet fixed to the second yoke; the second yoke includes an extending wall bending and extending into the third magnet; the extending wall is spaced apart from the third magnet to form a second magnetic gap; the first coil and the second coil are inserted into the first magnetic gap and second magnetic gap, respectively; the first sound unit surrounds the second sound unit, the second diaphragm is located on one side of the first diaphragm facing the magnet system. The coaxial earphone core has better sound quality.