Vehicle Speaker Box Hinge Pillar Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing speaker structure in vehicles, where the speaker is mounted in a non-rigid fender, leads to noise generation due to sound vibrations, compromising sound reproduction efficiency and cabin acoustics.
Innovation Solution
A speaker box is fixed to a rigid hinge pillar at the vehicle's front corner, allowing efficient sound transmission while minimizing noise through a sheet metal construction that includes a closed cross-section and strategic reinforcement, ensuring effective noise reduction and improved sound reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the speaker is disposed in the fender (non-rigid body member), then the speaker can be installed in the vehicle body, but the vibration of the sound reproduced by the speaker causes noise from the vehicle body
Solution Approach 1:
A speaker box made of rigid material is introduced as an intermediary structure between the speaker and the vehicle body. The speaker is mounted inside the speaker box, which is then disposed in the fender. This intermediary rigid structure isolates the speaker vibrations from the vehicle body, preventing noise generation while maintaining ease of installation.
Solution Approach 2:
The speaker box is constructed from rigid materials (such as metal or rigid plastic) that provide structural stability and vibration resistance. This composite approach combines the flexibility of the fender with the rigidity of the speaker box to eliminate noise while preserving installation ease.
2Reliability
If the speaker is jointed to the frame of the fender, then the speaker can be secured in place, but the noise from the vehicle body due to sound reproduction increases
Solution Approach 1:
The speaker box serves as a mediator that decouples the speaker from direct contact with the vehicle body frame. The speaker is secured to the speaker box, which is then mounted to the fender frame, creating an isolation layer that prevents vibration transmission while maintaining secure mounting.
3Object-generated harmful factors
If the speaker box is fixed to the rigid hinge pillar, then the abnormal noise from the vehicle body decreases, but the device complexity increases
Solution Approach 1:
The speaker box is designed to serve multiple functions: it houses the speaker, provides structural support, isolates vibrations, and can be integrated with existing vehicle components like the hinge pillar. This multi-functionality reduces the need for additional noise isolation components, thereby limiting the increase in device complexity.
4Object-generated harmful factors
If the speaker box is made of sheet metal member with closed cross-section, then the noise reduction effectiveness increases, but the weight of the speaker box increases
Solution Approach 1:
The speaker box employs a closed cross-section structure made of sheet metal, providing rigid noise isolation where most needed. The design optimizes material distribution to achieve maximum noise reduction effectiveness with minimum weight, using the closed section geometry to provide structural efficiency.
Data Source
AI summary
To a hinge pillar including a hinge pillar inner and a hinge pillar outer that form a closed cross-section extending vertically, a speaker box configured to hold and house a speaker therein is joined and fixed. As necessary, the speaker box includes a box part formed of a sheet metal member including a bottom and side walls that form a housing space housing the speaker, together with the bottom. The box part is arranged in the opening, with the bottom located in the closed cross-section and with the housing space open inside a vehicle cabin, and is joined to an edge of the opening.