Vehicle Door Protrusion Design for Trim Height Control
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Solution Overview
Problem
The existing connection between a vehicle door's corner piece and weather strip restricts design flexibility due to the protrusion's high compressive rigidity, causing the door trim's upper face to move upward when the protrusion contacts the reverse face of the door trim.
Innovation Solution
A hollow protrusion with an opening in its outer peripheral side wall, which can be compressed to reduce its rigidity, allowing it to deform and lower its height, thereby reducing the protrusion's projection and increasing design freedom, while maintaining basal portion rigidity through controlled slit openings or areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the protrusion is made with a solid structure to ensure strength and rigidity, then the structural integrity is improved, but the compressive rigidity becomes too high causing the door trim upper face to move upward and reducing design freedom
Solution Approach 1:
The protrusion is designed with a hollow internal structure instead of solid, creating a porous configuration that reduces compressive rigidity while maintaining structural integrity. This allows the protrusion to deform under compression, enabling the door trim upper face to be positioned lower and increasing design freedom.
Solution Approach 2:
The hollow structure is applied locally to the protrusion region, allowing different parts of the corner piece to have different mechanical properties. The hollow protrusion provides flexibility where needed, while other parts of the corner piece maintain their solid structure for overall strength.
2Adaptability or versatility
If the protrusion is made hollow to reduce compressive rigidity and increase design freedom, then the door trim positioning flexibility is improved, but the structural strength may be compromised
Solution Approach 1:
The hollow structure is applied locally to the protrusion region, allowing different parts of the corner piece to have different mechanical properties. The hollow protrusion provides flexibility where needed, while other parts of the corner piece maintain their solid structure for overall strength.
Solution Approach 2:
The corner piece combines hollow and solid structural elements to create a composite configuration. The hollow protrusion provides the needed flexibility, while the solid portions of the corner piece maintain overall structural strength and rigidity.
3Stability of the object's composition
If the opening area in the protrusion is increased to reduce compressive rigidity, then the deformability is improved, but the rigidity of the basal portion may be compromised
Solution Approach 1:
The opening is positioned and sized to affect only the protrusion region, allowing the distal end to deform while the basal portion maintains its rigidity. This localized modification enables controlled deformation where needed without compromising the structural integrity of the base.
Solution Approach 2:
The opening is designed with a specific area that is sufficient to reduce compressive rigidity of the protrusion for deformability, but not so large as to compromise the basal portion rigidity. This partial action achieves the needed effect without excessive modification.
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 solution allows for a lower trim upper face height, simplifies assembly, and enhances design freedom by reducing the protrusion's compressive rigidity, preventing damage and ensuring the basal portion's integrity.
Implementation Method 1
the protrusion can be deformed by applying compressive force to the protrusion, and the height of the protrusion can be lowered
Data Source
AI summary
A vehicle door includes a door panel, a corner piece that is disposed at a door waist portion of the door panel and that includes a protrusion, a weather strip that is disposed to extend along an outer peripheral edge of the door panel and that has a hole portion with which the protrusion is engaged, and a door trim that is disposed to cover the corner piece. The protrusion has a hollow structure and includes an outer peripheral side wall, and an opening is provided in a part of the outer peripheral side wall.