Compact Dual-Driver Speaker Device for High-Frequency Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional single-driver headphones have poor resolution at high frequency bands due to structural thickness and low tweeter sensitivity, failing to meet market requirements for size and sound production performance.
Innovation Solution
A speaker device design featuring a woofer and tweeter configuration with a unique magnetic circuit arrangement, where the tweeter shares an auxiliary magnet with the woofer, enhancing magnetic flux density and sensitivity, and includes a sound leading tube for improved high-frequency sound transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tweeter is provided in the headphone to improve high frequency resolution, then sound production performance is improved, but structural thickness increases
Solution Approach 1:
The patent merges the magnetic circuit units of the woofer and tweeter into a single integrated structure. The first magnetic circuit unit of the woofer and the second magnetic circuit unit of the tweeter are combined, allowing the tweeter to share the magnetic circuit space with the woofer, thereby reducing overall structural thickness while maintaining both drivers
Solution Approach 2:
The tweeter is nested within the woofer structure, with the second vibration unit positioned in the spacing between the first magnetic circuit unit and the second magnetic circuit unit. This nested arrangement allows compact integration of both drivers without increasing external dimensions
2Reliability
If a tweeter is provided in the headphone to improve high frequency resolution, then sound production performance is improved, but device complexity increases
Solution Approach 1:
The patent combines the magnetic circuit units of both drivers into one integrated magnetic circuit structure, reducing the number of separate components and simplifying the overall assembly process while maintaining functional independence of the woofer and tweeter
Solution Approach 2:
The integrated magnetic circuit unit serves dual functions: it acts as the magnetic circuit for both the woofer and the tweeter, allowing a single structure to perform multiple functions and reduce overall device complexity
3Ease of manufacture
If the tweeter is arranged in the housing together with the woofer using a fixed latch, then assembly is simplified, but sensitivity of the tweeter decreases
Solution Approach 1:
The patent employs an elastic connection between the second frame and the first magnetic circuit unit, allowing dynamic adjustment and optimization of the tweeter's position and magnetic field exposure, thereby improving sensitivity while maintaining assembly simplicity through the elastic coupling mechanism
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 reduces structural thickness while improving tweeter sensitivity and sound production performance, better meeting market demands for size and sound quality.
Implementation Method 1
The first magnetic circuit unit includes an auxiliary magnet close to the second vibration unit. The second magnetic circuit unit includes a central magnet fixed to the second frame and side magnets located at a periphery of the central magnet. A magnetizing direction of the auxiliary magnet and a magnetizing direction of the central magnet are opposite to each other and are arranged along a vibrating direction of the first vibration unit.
Implementation Method 2
The tweeter includes a second vibration unit fixed to the second frame and located in a spacing between the first magnetic circuit unit and the second magnetic circuit unit... a tweeter voice coil fixed to a side of the tweeter diaphragm away from the central magnet
Data Source
AI summary
A headphone includes a housing and a speaker device. The speaker device includes a woofer and a tweeter. The woofer includes a first frame, a first magnetic circuit unit, and a first vibration unit. The tweeter includes a second frame, a second magnetic circuit unit, and a second vibration unit. The first magnetic circuit unit includes an auxiliary magnet close to the second vibration unit. The second magnetic circuit unit includes a central magnet fixed to the second frame and side magnets located at a periphery of the central magnet. A magnetizing direction of the auxiliary magnet and a magnetizing direction of the central magnet are opposite and are arranged along a vibrating direction. Magnetizing directions of the side magnets each point to the central magnet. The speaker device can better satisfy requirements of markets on the size and sound production performance of the headphone.