Speaker Unit With Segmented Cylindrical Frame For Sound Quality Consistency

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Solution Overview

Problem

Variations in sound quality occur in earphones due to the placement of boards and wiring lines, which affect the space volume and solder amount, leading to inconsistent sound quality across individual units.

Innovation Solution

A speaker unit design with a cylindrical frame, a diaphragm, and a board connected by a wiring line, where the diaphragm and board are placed with a consistent space between them, reducing variations in sound quality by maintaining a constant volume for sound adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a board and wiring line are placed in the space for adjusting sound quality, then the earphone can function with necessary components, but the sound quality varies in individual earphones due to variations in space volume

Engineering Contradiction:

Improvecomponent integrationVSAvoidsound quality consistency

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The internal space is divided into two distinct regions: a first space for accommodating the board and wiring line, and a second space for adjusting sound quality. This segmentation isolates the components that cause volume variations from the acoustic space, allowing both component integration and consistent sound quality to be achieved simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The board and wiring line are extracted from the sound quality adjustment space and placed in a separate first space. This extraction removes the source of volume variations from the acoustic environment, eliminating the problem of sound quality variations while maintaining all necessary functional components within the earphone housing.

Inventive Principle:

Principle #2Taking out (Extraction)

2Adaptability or versatility

If the space volume is adjusted to optimize sound quality, then sound quality can be tuned, but the placement of components causes the space volume to vary, leading to inconsistent sound quality

Engineering Contradiction:

Improvesound quality adjustmentVSAvoidsound quality consistency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The internal space is divided into two distinct regions: a first space for accommodating the board and wiring line, and a second space for adjusting sound quality. This segmentation isolates the board and wiring line from the sound quality adjustment space, ensuring that variations in component placement do not affect the volume of the acoustic space. Consequently, sound quality can be consistently tuned and adjusted without reliability issues arising from manufacturing variations.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12108202B2Speaker unit and earphone

Publication Date: 2024.10.01 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A speaker unit incorporated in a housing of an earphone includes: a frame having a cylindrical shape; a diaphragm emitting sound; and a board to which a wiring line of a coil provided to the diaphragm is connected. The frame has a space inside, and the diaphragm and the board are placed inside the frame with the space interposed between the diaphragm and the board.