Loudspeaker Coupling Member Deformation for Vibration Control
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Solution Overview
Problem
Conventional loudspeaker systems embedded in vehicle doors suffer from reduced sound quality due to unnecessary vibration and resonance, which can compromise safety by transmitting external forces to internal components, potentially causing deformation or breakage.
Innovation Solution
A loudspeaker system design featuring a housing with a coupling member that couples plate-shaped first and second housing portions, where the coupling member is rigid and irreversibly deforms or breaks under external force, reducing vibration and maintaining safety by shortening its distance between ends when a specific force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a loudspeaker enclosure is embedded in the internal space of a vehicle door, then sound quality is improved, but external force applied to the outer panel is transmitted to the inner panel via the structure, causing deformation or breakage
Solution Approach 1:
The coupling member is divided into multiple segments or sections that can independently deform under external force. This segmentation allows the coupling member to absorb impact energy through controlled deformation of individual segments, preventing force transmission to the inner panel while maintaining the loudspeaker enclosure's position and sound quality.
Solution Approach 2:
The coupling member is designed with inherent deformation characteristics that allow it to act as a cushion before external force reaches the inner panel. The member's material properties and geometric design enable it to yield under impact, absorbing energy in advance and protecting the loudspeaker system and inner panel from damage.
2Manufacturing precision
If a rigid coupling member is used to couple housing portions, then vibration is reduced improving sound quality, but the coupling member may transmit external force causing deformation or breakage
Solution Approach 1:
The coupling member's physical parameters such as material composition, cross-sectional area, and length are optimized to achieve a balance between rigidity and deformability. The member exhibits high rigidity under normal operating conditions to reduce vibration, but is designed with specific parameters that allow controlled deformation when external force exceeds a threshold, preventing force transmission to critical components.
Solution Approach 2:
The coupling member is constructed from composite materials that combine properties of rigidity and controlled deformability. These composite materials allow the member to maintain structural integrity and reduce vibration under normal conditions, while enabling energy absorption through deformation when subjected to external impact forces, thus protecting the loudspeaker system.
3Reliability
If the coupling member is designed to break under external force, then safety is improved by preventing projection into cabin, but sound quality may be compromised by the breaking mechanism
Solution Approach 1:
The function of force absorption and safety protection is extracted from the housing structure and assigned to the coupling member. The coupling member is specifically designed as a sacrificial component that breaks or deforms under external force, removing the harmful function of force transmission from the overall system while maintaining safety. This extraction allows the housing portions to focus on acoustic performance without compromising safety.
Solution Approach 2:
The coupling member is designed as a disposable or sacrificial component with lower structural requirements compared to the housing portions. It is intentionally designed to fail under external force, serving as a protective element that sacrifices itself to prevent damage to more critical components and ensure safety. This approach prioritizes safety over the longevity of the coupling member itself.
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 configuration enhances sound quality while ensuring safety by preventing the loudspeaker system from projecting into the cabin and maintaining structural integrity during external forces, thus improving both acoustic performance and safety.
Implementation Method 1
the coupling member is irreversibly deformed or broken so as to shorten a distance between the first end and the second end of the coupling member
Data Source
AI summary
A loudspeaker system includes a housing including a first housing portion and a second housing portion that are plate-shaped and face each other, a loudspeaker drive unit fixed to the first housing portion, and a coupling member that is rigid and couples the first housing portion and the second housing portion to each other inside the housing. The coupling member includes a first end that is directly or indirectly coupled to the first housing portion and a second end that is directly or indirectly coupled to the second housing portion. When second force is applied to the coupling member, the second force being smaller than first force that irreversibly deforms or breaks a coupling portion between the coupling member and the first housing portion, the coupling member is irreversibly deformed or broken so as to shorten a distance between the first end and the second end of the coupling member.