Planar Speaker Diaphragm with Sound Transmission Cavity

Solution Overview

Problem

Conventional speakers with curved or spherical diaphragm structures are complex to manufacture and assemble, leading to increased costs and non-uniform sound production due to the complexity of forming and assembling these surfaces.

Innovation Solution

A speaker with a planar diaphragm structure and a positioning structure having a cavity that penetrates both sides, allowing for simplified manufacturing and assembly, improved durability through plating, and enhanced sound quality by preventing the positioning structure from blocking sound and maintaining softness and rigidity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a curved or spherical diaphragm structure is used, then the sound production capability is improved, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improvesound production capabilityVSAvoiddiaphragm structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent inverts the conventional curved/spherical diaphragm design by using a planar diaphragm structure instead. This inversion simplifies the manufacturing process while maintaining sound production capability through the positioning structure with sound transmission cavity that compensates for the planar geometry.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts the curvature function from the diaphragm structure itself and relocates it to the positioning structure with the sound transmission cavity. This separation allows the diaphragm to remain simple and planar while the positioning structure provides the necessary acoustic functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a curved or spherical diaphragm structure is used, then the sound production capability is improved, but the manufacturing process complexity increases

Engineering Contradiction:

Improvesound production capabilityVSAvoiddiaphragm manufacturing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent inverts the conventional curved/spherical diaphragm design by using a planar diaphragm structure instead. This inversion simplifies the manufacturing process while maintaining sound production capability through the positioning structure with sound transmission cavity that compensates for the planar geometry.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent adopts a planar diaphragm that can be manufactured using simpler, less expensive processes. The diaphragm is designed as a simple planar structure that can be produced cost-effectively, with the complex acoustic functionality transferred to the positioning structure.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If a curved or spherical diaphragm structure is used, then the sound production capability is improved, but the assembly complexity increases

Engineering Contradiction:

Improvesound production capabilityVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent inverts the conventional curved/spherical diaphragm design by using a planar diaphragm structure instead. This inversion simplifies the manufacturing process while maintaining sound production capability through the positioning structure with sound transmission cavity that compensates for the planar geometry.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent segments the acoustic functionality from the diaphragm structure and places it in the positioning structure with the sound transmission cavity. This segmentation allows the diaphragm to be a simple planar component that is easier to assemble, while the positioning structure provides the necessary acoustic pathways.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If a planar diaphragm structure is used, then the manufacturing process is simplified, but the sound uniformity may be affected

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidsound uniformity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent extracts the curvature function from the diaphragm structure itself and relocates it to the positioning structure with the sound transmission cavity. This separation allows the diaphragm to remain simple and planar while the positioning structure provides the necessary acoustic functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces the positioning structure with sound transmission cavity as an intermediary between the planar diaphragm and the acoustic environment. This intermediary compensates for the lack of curvature in the diaphragm and ensures uniform sound transmission.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 planar diaphragm structure simplifies manufacturing, reduces costs, and produces uniform sounds with a smoother frequency response, wider frequency band, and better sound quality by eliminating the need for complex processing equipment and assembly, while maintaining sensitivity and addressing high-frequency issues.

Implementation Method 1

The surface of the diaphragm is plated with a plating layer to improve the durability of the diaphragm. The rigidity of the diaphragm can be increased. The softness of the diaphragm is maintained.

Methodology Applied

Scientific EffectPlating: Electroplating

Data Source

PatentUS11778388B2Speaker

Publication Date: 2023.10.03 TRANSOUND ELECTRONICS CO LTD

AI summary

A speaker includes a speaker body and a diaphragm. The diaphragm is a planar structure. The speaker body includes a positioning structure. The positioning structure has a cavity penetrating front and back sides of the positioning structure. The diaphragm is positioned on the positioning structure. The diaphragm is in the form of a planar structure, instead of a curved or spherical structure. The planar structure of the diaphragm is simplified, so that the manufacturing process of the diaphragm is simpler.