ABS Diaphragm with Nanoscale Electroplating and Self-Aligning Silicone Edge

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Solution Overview

Problem

Traditional vibrating diaphragm structures in speakers often experience position deviations between the diaphragm body and suspension edge, leading to distortion and poor sound quality, especially in high-frequency responses due to the use of paper materials.

Innovation Solution

A vibrating diaphragm made from acrylonitrile butadiene styrene (ABS) materials with a nanoscale electroplated surface and a suspension edge formed from room temperature vulcanized silicone rubber, where the ABS diaphragm body is molded with an annular-shaped slot to ensure precise alignment with the suspension edge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the diaphragm body is stuck on the suspension edge by an operator, then the assembly process is simple, but position deviation occurs and the centers do not align

Engineering Contradiction:

Improveassembly process simplicityVSAvoidposition alignment precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The suspension edge is designed with a self-aligning structure that automatically centers the diaphragm body during assembly. The L-shaped cross-section with flange and groove creates a mechanical self-positioning system that eliminates the need for operator alignment skills, ensuring the centers of the diaphragm body and suspension edge coincide without manual positioning.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The suspension edge structure creates a self-equilibrating positioning system where the flange and groove geometry provides automatic centering force. This equipotential design ensures that the diaphragm body naturally settles at the correct position regardless of assembly variations, maintaining consistent alignment precision.

Inventive Principle:

Principle #12Equipotentiality

2Quantity of substance

If the diaphragm body uses paper material, then the manufacturing cost is low, but the high frequency performance is poor

Engineering Contradiction:

Improvematerial costVSAvoidhigh frequency performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent changes the material parameters of the diaphragm body from traditional paper to polypropylene resin. This parameter change improves high-frequency response and distortion characteristics while maintaining manufacturing feasibility. The polypropylene material provides better mechanical properties for high-frequency vibration without significantly increasing cost.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The suspension edge uses a composite structure combining polypropylene resin for the diaphragm body with rubber material for the suspension edge. This composite approach optimizes both the acoustic performance of the diaphragm and the mechanical compliance of the suspension system, achieving good high-frequency response with controlled distortion.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If the centers of the diaphragm body and suspension edge are not the same, then assembly is more flexible, but distortion and sound quality are greatly affected

Engineering Contradiction:

Improveassembly flexibilityVSAvoiddistortion and sound quality degradation

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The suspension edge incorporates a self-aligning mechanism that automatically ensures center coincidence during assembly. The L-shaped cross-section with integrated flange and groove creates a self-positioning system that guides the diaphragm body into the correct position, eliminating the need for precise manual alignment while preventing distortion and sound quality issues.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Inventive Principle:

Principle #12Equipotentiality

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 improves high-frequency sound pressure by up to 5 dB and maintains low distortion rates, enhancing overall speaker performance.

Implementation Method 1

A surface of the diaphragm body is electroplated a layer of nanoscale materials

Methodology Applied

Scientific EffectElectroplating: Electroplating

Implementation Method 2

The suspension edge is made by room temperature vulcanized silicone rubber materials

Methodology Applied

Scientific EffectVulcanization:

Data Source

PatentUS9813817B2Vibrating diaphragm structure and method of manufacture thereof

Publication Date: 2017.11.07 CHENG UEI PRECISION IND CO LTD

AI summary

A vibrating diaphragm includes a diaphragm body and a suspension edge. The diaphragm body is made by acrylonitrile butadiene styrene materials. A surface of the diaphragm body is electroplated a layer of nanoscale materials. The suspension edge is made by room temperature vulcanized silicone rubber materials. The suspension edge is molded an outer periphery of the diaphragm body. The vibrating diaphragm can improve the high frequency effect of the speaker.