Bilateral Loudspeaker Design Using Segmented Drive Units
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Solution Overview
Problem
Existing loudspeakers have a high thickness and can only emit sound on one side of the film cone, limiting their functionality and efficiency.
Innovation Solution
A loudspeaker design featuring a loudspeaker box with a middle frame, first and second diaphragms, and a drive unit comprising a U-iron, magnet, magnetic conductive plate, and voice coil, where the U-iron is disposed on the first diaphragm and the voice coil on the second diaphragm, allowing for bilateral sound emission by utilizing elastic and hard film layers to enhance vibration and sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a film cone with wavy positioning support chip is used, then the loudspeaker structure is formed, but the thickness becomes large and sound can only be emitted from one side
Solution Approach 1:
The loudspeaker is segmented into two independent drive units, each capable of sound emission. The first drive unit with U-iron emits sound from one side, while the second drive unit with voice coil emits sound from the other side, enabling bilateral sound emission and reducing the need for a deep single-sided structure
Solution Approach 2:
The invention transitions from a single-sided sound emission structure to a bilateral sound emission structure by adding another active surface (the second diaphragm with voice coil). This dimensional change in sound emission capability allows sound to propagate from both sides of the loudspeaker, effectively reducing the required thickness
2Productivity
If a single-sided sound emission structure is used, then the structure is simple, but the sound emission efficiency is limited
Solution Approach 1:
The loudspeaker structure is designed with multi-functionality where both the first diaphragm (with U-iron) and the second diaphragm (with voice coil) serve as active sound emission surfaces. This universal design allows the same basic structure to emit sound from both sides, doubling the sound emission efficiency without proportionally increasing complexity
Solution Approach 2:
Two drive units are merged into a single integrated loudspeaker structure sharing common components like the magnetic circuit and housing. The first drive unit (U-iron based) and second drive unit (voice coil based) are combined in such a way that they share the magnetic field and structural support, achieving bilateral sound emission without doubling the overall 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 design achieves thinner and more efficient sound emission on both sides, improving the loudspeaker's performance and usability in audio-visual devices by enabling bilateral sound output.
Implementation Method 1
a voice coil sleeved on the magnet and the magnetic conductive plate
Implementation Method 2
a magnetic conductive plate disposed on the magnet, where the magnetic conductive plate and the U-iron are respectively positioned on two opposite sides of the magnet
Data Source
AI summary
Provided are a loudspeaker and an audio video device. The loudspeaker includes a loudspeaker box and a drive unit. The loudspeaker box includes a middle frame, a first diaphragm and a second diaphragm. The first diaphragm and the second diaphragm are respectively disposed at the two ends of the middle frame, the first diaphragm, the second diaphragm and the middle frame are enclosed to form a sound cavity. The drive unit is disposed in the sound cavity. The drive unit comprises a U-iron, a magnet, a magnetic conductive plate and a voice coil. The magnet is disposed on the U-iron, the magnetic conductive plate is disposed on the magnet, and the voice coil is sleeved on the magnet and the magnetic conductive plate. The U-iron is disposed on the first diaphragm, and the voice coil is disposed on the second diaphragm.