Integrated AVAS Speaker Housing for Wider Radiation Area
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Solution Overview
Problem
Acoustic vehicle alerting systems for electric and hybrid vehicles face challenges in maximizing efficiency while maintaining compact size and protecting against external agents, with existing designs requiring screws/rivets and gaskets that limit effective radiation area and expose components to harsh environments.
Innovation Solution
The system integrates the front part of the casing and the loudspeaker frame into a single piece, eliminating the need for screws/rivets and gaskets, which increases effective radiation area, enhances protection from external agents, and simplifies manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If screws/rivets and gaskets are used to connect the front part of the casing and the loudspeaker frame, then mechanical connection and sealing are achieved, but the effective radiation area is reduced and manufacturing complexity increases
Solution Approach 1:
The patent merges the front part of the casing and the loudspeaker frame into a single integrated component. This eliminates the need for separate connection elements (screws/rivets) and sealing elements (gaskets), thereby maximizing the effective radiation area while reducing structural complexity. The integration is achieved through co-molding or integral forming processes that create a unified structure with both protective and acoustic functions.
2Strength
If screws/rivets and gaskets are used to connect the front part of the casing and the loudspeaker frame, then mechanical connection is achieved, but manufacturing steps and costs increase
Solution Approach 1:
By integrating the front part of the casing and loudspeaker frame into one piece, the patent eliminates multiple assembly steps involving screws, rivets, and gasket installation. This reduces manufacturing complexity and labor requirements while maintaining structural integrity through the integrated design that distributes mechanical loads across the unified structure.
3Object-affected harmful factors
If separate front part and loudspeaker frame are used, then assembly flexibility is maintained, but protection from external agents is compromised
Solution Approach 1:
The integrated structure eliminates gaps and interfaces between separate components that could allow water, dust, and other external agents to penetrate. The unified design provides continuous protection across the entire front assembly, while the co-molding process creates seamless transitions that prevent ingress pathways.
4Productivity
If the effective radiation area is increased, then loudspeaker efficiency is improved, but the casing size may need to increase
Solution Approach 1:
The integration of the front part and loudspeaker frame allows for optimized spatial arrangement and elimination of wasted space that would be required for separate connection and sealing components. This enables a larger effective radiation area within the same overall casing footprint, as the integrated structure eliminates the need for clearance around fasteners and sealing elements.
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 results in improved efficiency, increased protection from environmental factors, and reduced manufacturing costs without altering the casing size, achieving a wider effective radiation area and enhanced durability.
Implementation Method 1
When an electrical current is applied to the voice coil, the interaction between the electric current in the voice coil and the magnetic field in the air gap generates a mechanical force that moves the voice coil axially through the air gap and, thus, the former and the cone attached thereto.
Data Source
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AI summary
An acoustic vehicle alerting system (100) is disclosed, which comprises a loudspeaker (102) and a casing (104) in which the loudspeaker (102) is received, wherein the loudspeaker (102) comprises a frame (114) and a cone (116), wherein the casing (104) comprises a front part (104a) and a rear part (104b) connected to each other, said front part (104a) having an opening (108) facing the cone (116) of the loudspeaker (102), and wherein the front part (104a) of the casing (104) and the frame (114) of the loudspeaker (102) are made integrally with each other to form one single piece.