Articulated Vehicle Speaker System With Powered Hinges
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Solution Overview
Problem
Conventional automotive speaker enclosures face challenges in achieving airtight seals and effective acoustic decoupling, especially in complex 3D shapes, which affects sound quality and manufacturing efficiency, and there is a need for a low-cost, compact speaker system that can automatically deploy on vehicles.
Innovation Solution
An articulated vehicle speaker system with injection molded panels and powered hinge assemblies that allow limited swinging movement, featuring a central compartment to separate speaker units and include bidirectional actuators and transmission subassemblies for automatic deployment, utilizing DC motors and gear systems for precise movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional injection molded enclosures are used for speaker systems, then manufacturing efficiency is improved, but achieving airtight seals and effective acoustic decoupling in complex 3D shapes becomes difficult
Solution Approach 1:
The speaker enclosure is divided into multiple separate components: a front housing, a rear housing, and acoustic decoupling elements. This segmentation allows each component to be manufactured separately with standard injection molding processes while maintaining airtight seals through precision-machined mating surfaces and sealing mechanisms, resolving the contradiction between manufacturing efficiency and seal quality.
Solution Approach 2:
Acoustic decoupling elements serve as intermediary components between the front and rear housings. These elements provide both acoustic isolation and structural alignment, enabling airtight seals while maintaining manufacturing efficiency through modular assembly of pre-manufactured components.
2Ease of manufacture
If speaker enclosures are made with thin walls to reduce cost and weight, then manufacturing cost is reduced, but the enclosure becomes susceptible to vibration affecting sound quality
Solution Approach 1:
The enclosure utilizes composite construction combining thin-walled injection molded plastic housings with reinforced structural elements and acoustic decoupling materials. This composite approach maintains cost-effectiveness and light weight while providing vibration resistance through material properties and structural design.
Solution Approach 2:
Acoustic decoupling elements act as intermediary components that isolate vibration between different enclosure sections. These elements allow the use of thin-walled cost-effective housings while preventing vibration transmission that would degrade sound quality.
3Volume of moving object
If multiple speaker units are mounted in a single enclosure to save space, then compactness is improved, but acoustic decoupling between speakers becomes difficult
Solution Approach 1:
The enclosure is segmented into acoustically isolated compartments using decoupling elements and barriers. This segmentation allows multiple speaker units to be mounted in close proximity while maintaining acoustic independence, achieving compactness without compromising sound quality.
Solution Approach 2:
Acoustic decoupling is achieved by introducing dimensional separation through layered structures and spatial arrangement of decoupling elements. This approach allows compact packaging of multiple speakers while maintaining acoustic isolation through three-dimensional design rather than simple horizontal separation.
4Stability of the object's composition
If the speaker assembly is made fixed to the vehicle to ensure stability, then stability is improved, but the system cannot automatically deploy between positions
Solution Approach 1:
The speaker assembly employs a hinged connection system with powered actuators that enable dynamic movement between fixed positions. The assembly can be held stably at deployed or retracted positions while allowing automatic transition between states, combining stability during operation with deployment flexibility.
Solution Approach 2:
The deployment system incorporates feedback control through position sensors and actuators that automatically position the speaker assembly at desired locations. This feedback mechanism ensures stable positioning while enabling automatic deployment, resolving the contradiction between fixed stability and adaptive movement.
Data Source
AI summary
An articulated vehicle speaker system includes a vehicle mount adapted to be mounted on a vehicle and a speaker assembly including front and back injection molded panels which, when joined together, define a speaker compartment at first and second ends of the panels to house a speaker unit and a central compartment which separates the speaker compartments. A pair of spaced, powered hinge assemblies are disposed within the central compartment and hingedly connect the speaker assembly to the vehicle mount to allow limited swinging movement of the speaker assembly between different positions on the vehicle. Each hinge assembly includes a bidirectional, electrically-powered actuator and transmission subassembly. Each subassembly including a rotary output shaft and a set of interconnected transmission elements coupled to the output shaft and to the speaker assembly to automatically swing the speaker assembly based on a command signal.