Composite Basket Assembly for Audio Unit Insulation and Heat Dissipation

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Solution Overview

Problem

Existing audio units in mobile terminals face issues with short circuits when using metal baskets and inadequate heat dissipation when using plastic baskets, leading to insulation and temperature rise problems.

Innovation Solution

A basket assembly combining a metal and plastic portion with a conductive member embedded in the plastic, forming contacts to electrically couple with the voice coil and target circuits, ensuring insulation and heat dissipation while preventing short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a metal basket is adopted, then the heat dissipation effect is improved, but the insulation performance deteriorates and short circuit risk increases

Engineering Contradiction:

Improveheat dissipation effectVSAvoidinsulation performance

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The basket body is constructed using a composite structure comprising a metal portion and a plastic portion coupled together. The metal portion provides heat dissipation functionality, while the plastic portion provides insulation. This composite material approach resolves the contradiction by combining materials with complementary properties to simultaneously achieve both heat dissipation and insulation performance.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a plastic basket is adopted, then the insulation performance is improved, but the heat dissipation effect deteriorates and temperature rise increases

Engineering Contradiction:

Improveinsulation performanceVSAvoidheat dissipation effect

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

Inventive Principle:

Principle #40Composite materials

3Strength

If a metal basket is adopted, then the structural strength is improved, but the short circuit risk increases due to conductive circuit coupling

Engineering Contradiction:

Improvestructural strengthVSAvoidshort circuit risk

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The basket body is constructed using a composite structure comprising a metal portion and a plastic portion coupled together. The metal portion provides structural strength, while the plastic portion provides electrical insulation to prevent short circuits. This composite material approach resolves the contradiction by combining materials with complementary properties to simultaneously achieve both structural strength and electrical insulation.

Inventive Principle:

Principle #40Composite materials

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 solution achieves both effective insulation and heat dissipation, preventing short circuits and reducing temperature rise in audio units, thereby enhancing the performance and reliability of audio units in mobile terminals.

Implementation Method 1

a conductive member embedded in the plastic portion and forming a first contact and a second contact exposed out of the plastic portion, the first contact being configured to be electrically coupled to the voice coil of the audio unit, the second contact being configured to be electrically coupled to a target circuit

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

When the metal basket is adopted, because a conductive circuit that conducts a voice coil is arranged on a voice diaphragm and the voice diaphragm is coupled to the metal basket, there is a risk of short circuit. Also, insulation effect is not good. When the plastic basket is adopted, although the insulation performance is improved, heat dissipation effect is not good and temperature rise of the audio unit increases.

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS11750977B2Basket assembly, audio unit and electronic device

Publication Date: 2023.09.05 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A basket assembly, an audio unit and an electronic device. The basket assembly is applied to an audio unit with a voice coil and includes a basket body. The basket body includes: a metal portion, a plastic portion coupled to the metal portion; and a conductive member embedded in the plastic portion and forming a first contact and a second contact exposed out of the plastic portion, the first contact is configured to be electrically coupled to the voice coil of the audio unit, the second contact is configured to be electrically coupled to a target circuit, and the target circuit includes an audio signal input circuit or an audio signal output circuit.