Reflecting Cone Loudspeaker Structure for Smaller Sound Boxes

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Solution Overview

Problem

The miniaturization of small-sized loudspeakers is hindered by the need for separate installation of reflecting and active cones, which require additional space due to the use of brackets and lapping edges, limiting the volume reduction in sound boxes.

Innovation Solution

A loudspeaker structure integrating an active loudspeaker unit and a reflecting cone, where the reflecting cone is supported by the faying surface of the active loudspeaker unit, eliminating the need for a separate bracket, and utilizing a crescent-shaped reflecting counterweight surface and hot-melted connections to reduce space occupation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the reflecting cone and active loudspeaker are installed separately with individual brackets, then each component can be independently supported and positioned, but the total space occupied increases and miniaturization is limited

Engineering Contradiction:

Improvecomponent support stabilityVSAvoidsound box volume

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent combines the support function for both the active loudspeaker and reflecting cone into a single integrated bracket structure. The bracket includes an inner barrel for the active loudspeaker magnet assembly and extends to provide support for the reflecting cone, eliminating the need for separate brackets and reducing overall space occupation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bracket serves multiple functions simultaneously: it supports the active loudspeaker unit, positions the reflecting cone, and provides structural framework for the entire assembly. This multi-functional design reduces the number of components needed and minimizes the volume of the sound box.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate brackets are used for active loudspeaker and reflecting cone, then each component has dedicated support, but the lapping edges require additional surface space that limits miniaturization

Engineering Contradiction:

Improvecomponent mounting stabilityVSAvoidsurface space for lapping edges

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent integrates the mounting surfaces for both components into the single bracket structure. The faying surface is positioned to contact both the active loudspeaker unit and the reflecting cone, eliminating the need for separate lapping edges on different brackets and reducing the total surface space required.

Inventive Principle:

Principle #5Merging (Combining)

3Volume of stationary object

If the reflecting cone uses a small caliber horn, then the sound box volume is reduced, but the bass perception deteriorates due to insufficient air displacement

Engineering Contradiction:

Improvesound box volumeVSAvoidbass perception quality

Core Design Contradiction:

Volume of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent uses a reflecting cone (passive radiator) that is driven indirectly by acoustic pressure waves from the active loudspeaker. This passive cone has sufficient caliber to move enough air for good bass perception, and its position is optimized to reflect and amplify low frequency sound waves, compensating for the small size of the active horn.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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 integration allows for further miniaturization of the sound box while maintaining tone quality by reducing the occupied space and simplifying the structure, thus enhancing the bass perception in small-sized loudspeakers.

Implementation Method 1

the reflecting cone is usually used to tune bass and increase the low frequency effect of the sound box

Methodology Applied

Scientific EffectAcoustic reflection: Reflection

Implementation Method 2

The reflecting cone dangling edge is connected with the faying surface by hot melting

Methodology Applied

Scientific EffectHot melting:

Data Source

PatentUS12520076B2Loudspeaker structure with reflecting cone

Publication Date: 2026.01.06 ZHONGSHAN YUECHEN ELECTRONICS IND

AI summary

A loudspeaker structure with a reflecting cone may include an active loudspeaker unit and a reflecting cone, wherein the active loudspeaker unit comprises a bracket, a cone, an active cone dangling edge and a faying surface, the reflecting cone comprises a reflecting counterweight surface and a reflecting cone dangling edge, the reflecting cone dangling edge is arranged around the edge of the reflecting counterweight surface, and the faying surface is arranged around the reflecting cone dangling edge and fixed with the reflecting cone dangling edge. In the present application, the bracket and the faying surface of the active loudspeaker unit are expanded to surround the reflecting cone in the faying surface, and the reflecting cone is supported by the faying surface of the active loudspeaker unit, so the reflecting cone of this product does not need the bracket.