Speaker Diaphragm Arcuate Edge Depression

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Solution Overview

Problem

Conventional speakers face challenges in optimizing the vibrating space for the diaphragm, which affects sound quality and size constraints, particularly in compact electronic devices like mobile phones.

Innovation Solution

The speaker design incorporates an elastic plate with a serpentine ring and a diaphragm with an arcuate edge portion, reducing the vibrating space while maintaining effective vibration through a pair of coils connected to the diaphragm's center, enhancing the magnetic system's interaction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large vibrating space is provided for the diaphragm to vibrate away from the magnetic system, then sound quality is improved, but the height of the speaker increases

Engineering Contradiction:

Improvesound qualityVSAvoidheight of speaker

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent inverts the conventional diaphragm configuration by making the arcuate portion depressed toward the magnetic system instead of protruding away from it. This inversion allows the diaphragm to vibrate within a compact space while maintaining effective vibration amplitude, thereby improving sound quality without increasing speaker height

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the vibration dimension by depressing the arcuate portion toward the magnetic system, creating a vibrating space in a different spatial configuration. This dimensional change enables the diaphragm to achieve sufficient vibration amplitude within a reduced height constraint

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 configuration allows for improved sound quality and reduced speaker height by optimizing the magnetic gap and vibrating space, addressing the size and sound quality limitations of conventional speakers.

Implementation Method 1

at least a coil (5) defining an end suspended in the magnetic gap (21)

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

an elastic plate (3) assembled with the holder (1) and defining a first surface (311) and a second surface (312) opposite to the first surface (311)

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS9113258B2Speaker

Publication Date: 2015.08.18 AAC ACOUSTIC TECH (SHENZHEN) CO LTD

AI summary

A speaker includes a holder forming a hollow space, a magnetic system received into the hollow space and defining a magnetic gap, an elastic plate assembled with the holder and defining a first surface and a second surface opposite to the first surface, a diaphragm defining a dome part connected with the first surface of the elastic plate and an edge part connected with the second surface of the elastic plate, and at least a coil defining an end suspended in the magnetic gap and an another end connected with the dome part. The edge part defines an arcuate portion depressed toward the magnetic system.