Double-Sided Speaker Shared Magnetic Circuit
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Solution Overview
Problem
Existing double-sided sound devices have large product volumes and high material costs due to the stacking of two single-sided sound devices with independent magnetic circuit systems.
Innovation Solution
A double-sided sound device design where the first and second vibration systems share a compact magnetic circuit system, reducing the need for multiple magnetic steels and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two single-sided sound devices are stacked to form a double-sided sound device, then acoustic performance is improved, but product volume becomes excessively large
Solution Approach 1:
The patent merges two independent magnetic circuit systems into a single shared magnetic circuit system. The outer magnetic yoke and magnet portion are commonly shared between the first and second vibration systems, while only the inner magnetic yokes differ. This merging reduces the overall number of magnetic components and enables a more compact arrangement, directly addressing the volume increase problem while maintaining the dual-sided acoustic performance.
Solution Approach 2:
The patent employs a nested structure where the first and second vibration systems are arranged in overlapping configurations. The voice coils are wound in opposite directions and positioned to share the same magnetic circuit space. The inner magnetic yokes are nested within the outer magnetic yoke structure, allowing both vibration systems to occupy overlapping spatial regions rather than requiring separate stacked volumes.
2Reliability
If two single-sided sound devices are stacked to form a double-sided sound device, then acoustic performance is improved, but material costs increase
Solution Approach 1:
The patent merges two independent magnetic circuit systems into a single shared magnetic circuit system. The outer magnetic yoke and magnet portion are commonly shared between the first and second vibration systems, while only the inner magnetic yokes differ. This merging reduces the overall number of magnetic components and enables a more compact arrangement, directly addressing the volume increase problem while maintaining the dual-sided acoustic performance.
Solution Approach 2:
The outer magnetic yoke and magnet portion serve dual functions by being part of both the first and second magnetic circuit systems simultaneously. These components generate magnetic fields for both vibration systems, eliminating the need for separate magnetic circuits and reducing material consumption while maintaining acoustic performance.
3Reliability
If two single-sided sound devices are stacked to form a double-sided sound device, then acoustic performance is improved, but device complexity increases
Solution Approach 1:
The patent merges two independent magnetic circuit systems into a single shared magnetic circuit system. The outer magnetic yoke and magnet portion are commonly shared between the first and second vibration systems, while only the inner magnetic yokes differ. This merging reduces the overall number of magnetic components and enables a more compact arrangement, directly addressing the volume increase problem while maintaining the dual-sided acoustic performance.
Solution Approach 2:
The magnetic circuit system is segmented into common components (outer magnetic yoke, magnet portion) and unique components (inner magnetic yokes). This segmentation allows for modular assembly and simplifies the overall structure by clearly defining which parts are shared and which are specific to each vibration system, reducing assembly complexity.
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 shared magnetic circuit system reduces product volumes and material costs while maintaining excellent acoustic performance by compacting the device structure and utilizing only one magnetic steel.
Implementation Method 1
the first voice coil drives the first vibrating diaphragm to generate sound. The second voice coil drives the second vibrating diaphragm to generate sound
Implementation Method 2
The magnetic circuit system includes an outer magnetic yoke, a magnet portion, and a non-magnetically conductive connector
Data Source
AI summary
A double-sided sound device includes a frame, a first vibration system, a second vibration system, and a magnetic circuit system. The frame includes an upper end opening and a lower end opening, the first vibration system is disposed at the upper end opening of the frame, the second vibration system is disposed at the lower end opening of the frame, and the magnetic circuit system is disposed in the frame. The magnetic circuit system includes an outer magnetic yoke, a magnet portion, and a non-magnetically conductive connector. The outer magnetic yoke includes a side wall and a first flange portion. The magnet portion includes an upper pole core, a lower pole core, and a magnetic steel, and the magnetic steel is clamped between the upper pole core and the lower pole core. The double-sided sound device reduces a product size, and further reduces material costs.