Back-to-Back Loudspeaker Enclosure With Single Tie-Rod Assembly
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Solution Overview
Problem
Existing acoustic enclosures for loudspeakers, particularly in the automotive industry, are heavy due to their rigid metal construction, making them unsuitable for weight-sensitive applications, and the mounting process is complex.
Innovation Solution
A lightweight acoustic enclosure made of plastic with a cylindrical box design, using a single tie rod to link two loudspeakers head-to-tail, secured by nuts and bolts, and an intermediate ring for angular positioning, allowing for easy assembly and disassembly without glue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid metal enclosure is used to protect speakers and ensure proper sound propagation, then reliability and sound quality are improved, but weight increases significantly
Solution Approach 1:
The patent changes the material parameter of the enclosure from metal to plastic, specifically using a rigid plastic material that maintains structural integrity and protective function while significantly reducing the weight of the enclosure compared to traditional metal constructions
Solution Approach 2:
The patent employs composite material construction by integrating the plastic enclosure with foam acoustic insulation material, creating a composite structure that provides both mechanical protection and acoustic isolation properties while maintaining lightweight characteristics
2Strength
If traditional mounting methods with multiple screws and central core are used to connect speakers, then connection strength is improved, but device complexity and assembly time increase
Solution Approach 1:
The patent merges the functions of multiple separate mounting components (central core, support blocks, pins, flanged rings) into a simplified single-screw mounting system where one screw simultaneously secures both speakers to the enclosure, reducing the number of parts and assembly steps while maintaining connection strength
Solution Approach 2:
The single screw used in the mounting system serves multiple functions: it secures the first speaker, secures the second speaker, and provides structural support for the entire speaker assembly, demonstrating multi-functionality that reduces device complexity
3Stability of the object's composition
If speakers are rigidly linked with multiple components to ensure stability, then stability is improved, but weight and device complexity increase
Solution Approach 1:
The patent combines the linkage function of multiple components (central core, support blocks, pins) into a single-screw linkage system that rigidly connects both speakers to the enclosure, maintaining stability while reducing structural complexity to its simplest effective form
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 provides a compact, lightweight, and easy-to-assemble acoustic enclosure that maintains sound quality while reducing weight and simplifying the mounting process.
Implementation Method 1
The speakers dedicated to low frequencies are large and heavy components, capable of causing significant vibrations in the speaker enclosure. Therefore, they are arranged end-to-end so that the vibrations generated by one cancel out those generated by the other.
Data Source
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AI summary
Acoustic enclosure (10) comprising a box (15) carrying two loudspeakers (26, 27) arranged head-to-tail and rigidly linked to each other, characterized in that it comprises, on the one hand, a single tie rod (40) connecting the two loudspeakers with two rigging ends, by complementary shape, each cooperating with a loudspeaker (26, 27), the two ends being fixed to each other in rotation around the axis (XX) of the tie rod (40) and, on the other hand, an axial stop (50, 55) between the tie rod (40) and each loudspeaker.