Moving Iron Loudspeaker Unit with Segmented Vibrating Ring
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Solution Overview
Problem
Existing moving iron earphones suffer from low conversion efficiency, inadequate high/low frequency response, slow response speed, harmonic distortion, and poor mechanical shock resistance due to their design.
Innovation Solution
A moving iron unit with a vibrating ring structure, secured to the inner wall of a shielded cavity through an elastic body, connected to a diaphragm via a transmission rod, and featuring a coil directly formed on an iron core, which enhances mechanical shock resistance and conversion efficiency by driving two diaphragms simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional balanced armature structure (U-shaped, E-shaped, or flat) is used, then the device can be manufactured with simple processes, but the mechanical shock resistance is poor
Solution Approach 1:
The balanced armature is segmented into multiple independent arms (at least two arms extending in different directions from a common base), allowing each arm to independently absorb mechanical shock forces. This segmentation distributes stress across multiple elements rather than concentrating it in a single structure, significantly improving mechanical shock resistance while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
The balanced armature structure uses symmetrically arranged arms with equal mass distribution around the rotation axis, creating a counterbalanced system. This balance reduces the impact of mechanical shocks by distributing inertial forces evenly, preventing any single point from bearing excessive load during sudden movements or impacts
2Loss of energy
If a traditional moving iron unit design is used, then the structure is simple, but the conversion efficiency is low
Solution Approach 1:
The voice coil is divided into multiple independent coil segments (at least two coils) arranged in different spatial directions, each generating magnetic force in a specific direction. This segmentation allows for more efficient magnetic field utilization and better force distribution, improving conversion efficiency from electrical to mechanical energy while maintaining a relatively simple overall structure
Solution Approach 2:
Different regions of the balanced armature are optimized for different functions: some areas are designed with specific mass distributions for optimal vibration characteristics, while other regions are minimized to reduce unwanted inertia. This local optimization of mass distribution and structural properties enhances the overall conversion efficiency by ensuring each part contributes maximally to the desired motion
3Speed
If a traditional balanced armature is used, then the magnetic circuit is simple, but the high/low frequency response is insufficient
Solution Approach 1:
The balanced armature with multiple arms creates multiple independent vibration modes that can respond to different frequency ranges. Each arm can vibrate at its natural frequency, enabling the system to handle both high and low frequency signals effectively. This segmentation of vibration modes expands the frequency response range without requiring complex additional components
Solution Approach 2:
The balanced armature is designed to rotate freely around a central axis rather than moving in a fixed linear path. This dynamic rotation capability allows the structure to adapt its motion characteristics across different frequencies, maintaining high response speed across the entire frequency spectrum by optimizing the vibration pattern for each frequency range
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 significantly improves mechanical shock resistance and conversion efficiency while maintaining an unobstructed magnetic circuit, offering better sound generation and manufacturing simplicity.
Implementation Method 1
the moving iron unit works by the basic principle of electronic conversion, in which the AC signals go through the magnetic induction coil, which becomes magnetic by induction
Implementation Method 2
the magnetized (polarized) balanced armature vibrate up and down between two permanent magnets by the principle of 'likes repel and opposites attract'
Implementation Method 3
a vibrating ring, to which said magnet is secured, and which is secured to the inner wall of a shielded cavity through its elastic body disposed radially
Data Source
AI summary
This invention provides a moving iron unit for loudspeakers, which includes coil, iron core, diaphragm, and magnet, among which, the iron core is disposed in the coil, and the magnet is connected to the diaphragm on a transmission basis. It is characterized in that it also includes vibrating ring, to which the magnet is secured, and which is secured to the inner wall of a shielded cavity through its elastic body disposed radially, and which is connected to the diaphragm on a transmission basis through the transmission rod. Further, the unit comprises two diaphragms, which are disposed symmetrically at two sides of the vibrating ring and connected respectively to the vibrating ring on a transmission basis through a transmission rod. The coil is shaped directly by coiling on the iron core.