Door Trim Assembly Elastic Support for Mounting
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Solution Overview
Problem
In vehicular door trim assemblies, the limited space between the door trim and the body panel requires increased force for mounting due to reduced projecting length of holding portions, which can lead to deformation or breakage, and existing solutions compromise strength for easier mounting.
Innovation Solution
A door trim assembly with a weather strip featuring a stopper portion and holder portions that include an elastically deformable support portion, allowing the lower holder to pivot and increase the gap distance for easier insertion of the stopper portion, maintaining strength and facilitating smooth mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the holding portions are made shorter to fit limited space between door trim and body panel, then the space utilization is improved, but the mounting force required increases and the holding portions may deform or break
Solution Approach 1:
The support portion is designed to be elastically deformable, allowing it to dynamically change its shape during the mounting process. When the stopper portion is inserted, the support portion elastically deforms to increase the gap distance, facilitating easy insertion. After mounting, it returns to its original shape, maintaining the holding portions' strength and structural integrity for reliable long-term use.
Solution Approach 2:
The gap distance between the upper holder portion and lower holder portion is made variable rather than fixed. The support portion enables the gap distance to change based on mounting requirements: increased during insertion to reduce mounting force, and maintained at optimal levels afterward to ensure structural strength and reliability.
2Volume of moving object
If the holding portions are made shorter to fit limited space, then the space constraint is satisfied, but the ease of mounting deteriorates due to increased required force
Solution Approach 1:
The support portion's elastic deformability allows the gap distance to dynamically adjust during mounting. When the stopper portion is inserted, the support portion elastically deforms to increase the gap distance, creating more space for insertion and significantly reducing the mounting force required, thereby improving ease of mounting.
Solution Approach 2:
The gap distance is transformed from a fixed parameter to a variable parameter that can be adjusted based on operational needs. The support portion enables the gap distance to increase during the mounting operation, making insertion easier, while maintaining appropriate dimensions for structural integrity after mounting.
3Ease of operation
If the gap distance between holder portions is increased to facilitate insertion, then the ease of mounting is improved, but the holding strength may be compromised
Solution Approach 1:
The support portion's elastic deformability allows the gap distance to be temporarily increased during mounting to facilitate insertion, then return to its original configuration afterward. This dynamic adjustment enables easy mounting while preserving the holding portions' structural strength and holding capability for reliable long-term use.
Solution Approach 2:
The gap distance is made variable through the elastically deformable support portion. The gap distance can be increased when needed for mounting operations, then returned to optimal levels for maintaining holding strength, thus resolving the contradiction between ease of mounting and holding strength.
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
The solution enables easy and force-efficient mounting of the door trim on the weather strip without compromising the strength of the holding portions, ensuring reliable assembly even in configurations with limited space.
Implementation Method 1
the support portion being elastically deformable so that the lower holder portion is moved downwardly to increase the gap distance according to insertion of the stopper portion into a space formed by the gap distance
Data Source
AI summary
A door trim assembly includes a weather strip and a door trim. The door trim includes a holder plate portion arranged opposite the weather strip, an upper holder portion and a lower holder portion projecting from the holder plate portion toward the weather strip, and a support portion. The lower holder portion has a lower holder basal portion continuing from the holder plate portion, and has a gap distance from the upper holder portion. The lower holder portion and the upper holder portion hold a stopper portion of the weather strip therebetween. The support portion is provided near a portion of the holder plate portion where the lower holder basal portion of the lower holder portion continues, and is elastically deformable so that the lower holder portion is moved downwardly to increase the gap distance according to insertion of the stopper portion into a space formed by the gap distance.