Vehicle Door Frame Molding Garnish Integration
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Solution Overview
Problem
Conventional fixing structures for frame moldings and garnishes on vehicle doors require significant width and lack precision, making it difficult to achieve an excellent appearance due to the use of intermediate brackets.
Innovation Solution
The garnish is directly fixed to the frame molding, which is then attached to the door panel without an intermediate bracket, using thermally welded bosses and support plates to ensure precise alignment and reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a bracket is used to fix the frame molding and garnish to the door panel, then the fixing structure is simple and easy to manufacture, but the width in the vehicle widthwise direction increases and positional accuracy deteriorates
Solution Approach 1:
The patent merges the bracket and garnish into a single integrated component. The garnish is directly formed with mounting portions that attach to the frame molding, eliminating the need for a separate bracket. This integration reduces the overall width in the vehicle widthwise direction while maintaining ease of manufacture through standardized attachment mechanisms.
Solution Approach 2:
The patent extracts the bracket function from the garnish and integrates it directly into the frame molding structure. The mounting portions are built into the frame molding itself, allowing direct attachment of the garnish without requiring a separate bracket component, thereby reducing width.
2Ease of manufacture
If a bracket is used to fix the frame molding and garnish to the door panel, then the fixing structure is simple, but the positional accuracy between frame molding and garnish deteriorates
Solution Approach 1:
The patent replaces the mechanical bracket-based fixing system with a direct integration system where the garnish is attached to the frame molding through built-in mounting portions. This substitution eliminates the intermediate bracket that caused positional inaccuracies, allowing for more precise positioning while maintaining ease of manufacture through standardized attachment features.
3Ease of operation
If the garnish is fixed to the door panel independently via bracket, then the fixing operation is simple, but the dimensional control between frame molding and garnish becomes difficult
Solution Approach 1:
The patent combines the garnish attachment operation with the frame molding installation operation. By integrating the mounting portions directly into the frame molding, the garnish is attached as part of the frame molding installation process, eliminating independent fixing operations and enabling precise dimensional control between the frame molding and garnish.
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 configuration enhances positional accuracy and reduces the overall thickness of the frame molding in the vehicle widthwise direction, resulting in an improved outward appearance.
Implementation Method 1
bosses which are thermally welded to the support holes while being inserted into the support holes, respectively, are formed on the garnish to project therefrom
Data Source
AI summary
A frame molding includes a horizontal portion extending along an upper edge of a door panel and an inclined portion extending obliquely upwards from the horizontal portion to be connected to an upper sash. A decorative garnish is formed from synthetic resin and has an external shape that corresponds to external shapes of the horizontal portion and the inclined portion of the frame molding. The dimensions of the frame molding in the vehicle widthwise direction are reduced. The positioned accuracy between the frame molding and the garnish is enhanced by fixing the garnish to the frame molding that is fixed to the door panel.