Integrated Loudspeaker Diaphragm Structure for Full-Range Efficiency
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Solution Overview
Problem
Conventional loudspeakers face a trade-off between achieving full-range sound capability and high efficiency, particularly in compact designs, as they often compromise on one or the other.
Innovation Solution
A loudspeaker design featuring a diaphragm with a central portion and an outer-circumferential portion formed as a single piece, bonded to an annular edge, enhancing structural rigidity and resonance suppression through a specific bonding method, which includes a voice coil body integrated within a magnetic circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a brim-shaped sub diaphragm is provided to protrude from the voice coil body to increase vibration area, then high efficiency is achieved, but device complexity increases
Solution Approach 1:
The patent merges the sub diaphragm and main diaphragm into a single integrated diaphragm structure formed from one piece of material. This eliminates the need for separate brim-shaped sub diaphragm components and their associated mounting structures, while still providing the extended vibration area needed for high efficiency. The single-piece construction reduces assembly steps and structural complexity.
Solution Approach 2:
The patent segments the diaphragm into a main diaphragm portion and a sub diaphragm portion that are formed as one piece but function as integrated units. The sub diaphragm portion extends from the voice coil body in a controlled manner to increase vibration area, achieving high efficiency without requiring separate component assembly.
2Ease of manufacture
If the outer-circumferential portion of the diaphragm is bonded to the edge at a location away from the central portion, then manufacturing is easier, but resonance suppression is reduced
Solution Approach 1:
The patent applies local quality by specifically positioning the bonding location of the outer-circumferential portion to the edge at a predetermined location in the vicinity of the central portion of the diaphragm. This specific local positioning optimizes resonance suppression by creating a rigid support structure at the critical area where vibration control is most needed, while still maintaining manufacturing feasibility.
3Reliability
If the diaphragm area is increased to achieve full-range sound capability, then sound quality improves, but device volume increases
Solution Approach 1:
The patent utilizes the vertical dimension by extending the sub diaphragm portion upward from the voice coil body to increase the effective vibration area. This vertical extension allows the diaphragm to achieve full-range sound capability with improved bass response without requiring a larger horizontal footprint, thus maintaining compact loudspeaker dimensions.
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 both full-range sound capability and high efficiency by reducing resonance, increasing the diaphragm area, and ensuring adequate air circulation, thereby improving audio quality and performance.
Implementation Method 1
a voice coil body 140 that is disposed in a magnetic gap 102 of the magnetic circuit 120
Data Source
AI summary
A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion.