Loudspeaker Shock Absorption Structure Using Elastic Cantilever

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Solution Overview

Problem

Current loudspeaker shock absorption structures fail to effectively reduce machine vibration caused by large-amplitude vibrations, particularly in heavy bass loudspeakers, leading to loose parts and vibration issues.

Innovation Solution

A loudspeaker shock absorption structure featuring a cantilever made of elastic material connecting two elastomers, one with an annular groove for the loudspeaker body and the other with a through hole for the fastener structure, forming a non-coaxial connection that buffers and filters vibrations, reducing the force transmitted to the fastener structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If only one layer of rubber washer is arranged between loudspeaker body and fastener structure, then the structure is simple, but the large-amplitude vibration of loudspeaker body directly transmits force to fastener structure causing machine vibration

Engineering Contradiction:

Improveshock absorption structureVSAvoidmachine vibration

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The single rubber washer is segmented into three components: first elastomer, cantilever, and second elastomer. This segmentation allows each component to perform specific functions - the first elastomer contacts the loudspeaker body, the cantilever provides flexible connection, and the second elastomer contacts the fastener structure, collectively reducing vibration transmission while maintaining structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cantilever acts as an intermediary element between the first and second elastomers. It provides a flexible connection that buffers and filters vibrations, preventing direct force transmission from the loudspeaker body to the fastener structure, thereby reducing machine vibration caused by large-amplitude vibrations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If rigid connection is used between loudspeaker body and fastener structure, then the connection is strong, but the large-amplitude vibration directly transmits force causing loose parts and machine vibration

Engineering Contradiction:

Improveconnection strengthVSAvoidmachine vibration

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent uses flexible elastomeric materials for the first and second elastomers, connected by a flexible cantilever. This flexible connection structure maintains strong mechanical bonding while allowing vibration isolation, preventing direct force transmission that would cause loose parts and machine vibration.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The elastomeric components and cantilever provide beforehand cushioning by absorbing and dampening vibrations before they can transmit to the fastener structure. This prevents the harmful effects of large-amplitude vibrations, such as loose parts and machine vibration, from occurring in the first place.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Object-affected harmful factors

If elastic material with high buffering capability is used for cantilever, then vibration transmission is reduced, but the connection strength between elastomers may be compromised

Engineering Contradiction:

Improvevibration transmissionVSAvoidconnection strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The shock absorption structure uses composite material design combining different elastomeric materials - the first elastomer, the cantilever, and the second elastomer can be made from different elastic materials with complementary properties. This allows optimization of both vibration buffering capability and connection strength, as each material can be selected for its specific strengths.

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 structure significantly reduces machine vibration by weakening and filtering the force from loudspeaker vibrations, effectively managing large-amplitude vibrations and preventing loose parts, with adjustable design features for various loudspeaker sizes and powers.

Implementation Method 1

a cantilever (30) that connects the first elastomer (10) and the second elastomer (20) to each other, and is made of an elastic material

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the cantilever (30), so that a force (F1) produced by a vibration of the loudspeaker body (2) cannot be directly transmitted to the loudspeaker fastener structure (3)

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentUS11089394B2Loudspeaker and loudspeaker shock absorption structure

Publication Date: 2021.08.10 GUANGZHOU SHIRUI ELECTRONICS

AI summary

A device includes a loudspeaker body, a loudspeaker fastener structure, and a loudspeaker shock absorption structure, in which the loudspeaker absorption structure further comprises a first elastomer, a second elastomer, and a bridging beam, wherein the bridging beam is made of an elastic material, and the first elastomer is connected to the second elastomer by the bridging beam.