Speaker Mounting Structure With Protrusion Gap For Harness Interference
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Solution Overview
Problem
Conventional speaker mounting structures in vehicles often result in interference between the tweeter harness and other devices housed in the front pillar trim, making it difficult to visually check and avoid interference during assembly.
Innovation Solution
A structure where the speaker is mounted with a protrusion portion that fits into an acceptance gap in the pillar trim, allowing for visual checking and adjustment to prevent interference with other devices, and a harness connection that is not exposed externally, facilitating easy adjustment and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tweeter is attached to the pillar trim in advance with the harness connected, then the assembly process is simplified, but the harness may interfere with the defroster duct or other devices in the pillar trim
Solution Approach 1:
The patent applies preliminary action by pre-attaching the tweeter to the pillar trim before final assembly, but delays harness connection until after the pillar trim is installed on the vehicle body. This allows workers to visually check and adjust the harness position to avoid interference with the defroster duct or other devices, while still benefiting from the simplified assembly process of pre-attached tweeters
2Productivity
If the pillar trim is assembled into the vehicle body side with the tweeter already attached, then the assembly efficiency is improved, but it becomes difficult to visually check the positional relationship between the harness and other devices
Solution Approach 1:
The patent maintains the productivity benefit of pre-attaching the tweeter to the pillar trim, but uses preliminary action in reverse by delaying the harness connection until after the pillar trim is installed. This timing allows workers to visually detect and measure the positional relationship between the harness and other devices like the defroster duct, preventing interference while maintaining assembly efficiency
3Reliability
If the speaker is positioned near the passenger's ear for excellent sound quality, then the sound quality is improved, but the harness may interfere with other devices in the pillar trim
Solution Approach 1:
The patent maintains the sound quality benefit of positioning the speaker near the passenger's ear by pre-attaching the tweeter to the pillar trim in the correct position. However, it delays harness connection until after the pillar trim is installed on the vehicle body, allowing visual adjustment of the harness to avoid interference with other devices while preserving the optimal speaker positioning for sound quality
Data Source
AI summary
A device is mounted on a vehicle body and housed in a space between a pillar inner and a pillar trim. A speaker is inserted into an opening portion opened in the pillar trim from an inside of a vehicle compartment and retained therein. A harness is connected to the speaker and disposed in the space. In a part of the speaker to be inserted into an inner side of the pillar trim, a protrusion portion is provided that protrudes radially outward. An insertion acceptance portion that is a gap for accepting insertion of the protrusion portion is provided in an opening edge portion facing the opening portion on an inner surface side of the pillar trim. The insertion acceptance portion has a width larger than a width of the protrusion portion.