Miniature Electroacoustic Transducer Modular Assembly
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Solution Overview
Problem
Conventional miniature electroacoustic transducers have complex designs due to separate components, constrained magnet size, and costly assembly processes, which hinder sensitivity and cost-efficiency.
Innovation Solution
A modularized miniature electroacoustic transducer design featuring a metal shell with a vibrating system and magnetic circuit system, where the magnetic circuit system includes a concentrating flux plate and magnet, and a dual magnetic circuit structure, allowing for simplified assembly and increased magnet size within the same dimensions, along with an assembly method that pre-assembles components for easier integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional injection-molded plastic shell is used to fix the magnetic circuit system, then the shell structure is simple to manufacture, but the magnet size is constrained which adversely affects sensitivity improvement
Solution Approach 1:
The patent merges the shell structure with the magnetic circuit system by using a metal shell that is directly formed with a magnet receiving cavity through stamping and bending processes. This integration eliminates the need for separate injection-molded plastic shells and adhesive fixation, allowing the magnet to be directly installed in the pre-formed cavity of the metal shell, thereby maximizing magnet size while maintaining structural simplicity.
2Ease of manufacture
If conventional separate component design is used, then each component can be manufactured independently, but the product design becomes complicated and assembly requires many tooling fixtures
Solution Approach 1:
The patent combines the shell and magnetic circuit system into an integrated structure where the metal shell is directly formed with the magnet receiving cavity. This merging simplifies the overall product design by reducing the number of separate components and eliminating the need for complex assembly tooling fixtures, while still allowing independent manufacturing of the metal shell through stamping and bending processes.
3Manufacturing precision
If conventional assembly process with many tooling fixtures is used, then each component can be precisely positioned, but the assembling process becomes complicated and production cost increases
Solution Approach 1:
The patent integrates the positioning function into the shell structure itself by forming the magnet receiving cavity directly on the metal shell. This eliminates the need for separate positioning fixtures and tooling during assembly, as the cavity provides inherent mechanical guidance and positioning for the magnet installation, thereby simplifying the assembly process and improving productivity while maintaining precise component positioning.
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 design simplifies product design, enhances sensitivity by maximizing magnet size, and reduces production costs through modularized assembly and reduced tooling requirements.
Implementation Method 1
a vibrating system, comprising a vibrating diaphragm and a voice coil; and a magnetic circuit system, comprising a concentrating flux plate, a magnet and a magnetic yoke that are sequentially combined together, wherein the magnetic circuit system is formed with a magnetic gap corresponding to the voice coil
Data Source
AI summary
A miniature electroacoustic transducer includes: a metal shell, having the shape of a barrel with one open end; a vibrating system, including a vibrating diaphragm and a voice coil; and a magnetic circuit system, including a concentrating flux plate, a magnet and a magnetic yoke that are sequentially combined together. The magnetic circuit system is formed with a magnetic gap corresponding to the voice coil; the vibrating system and the magnetic circuit system are fixedly installed in the barrel-shaped shell; the components in the structure are further modularized, maximizing the magnet under the same product dimension and effectively improving the product sensitivity. An assembling method of the electroacoustic transducer includes: a. providing a barrel-shaped metal shell with one open end; b. putting a pre-assembled vibrating system into the shell; c. putting a pre-assembled magnetic circuit system into the shell; and d. fixedly assembling the shell with the magnetic yoke.