Vehicle Decorative Structure Rib-Shaped Sealing Gap
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Solution Overview
Problem
In vehicle decorative structures, maintaining a small gap between the decorative member and the exterior member while ensuring the sealing member is effectively positioned between the decorative member and the window glass is challenging, particularly when the decorative member's front surface projects outward, as this creates a gap between the projecting surface and the vehicle body, compromising the visual appeal.
Innovation Solution
The decorative structure features a front surface part with a projecting portion that faces outward, accompanied by a wall part near the window glass and a rib-shaped part bulging toward the vehicle body, allowing the sealing member to abut both surfaces, with the rib-shaped part positioned closer to the exterior member than the wall part, and a linking part forming a step shape to prevent shifting and accommodate molding errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the decorative member is designed with a projecting front surface part to reduce the gap with the exterior member, then the visual appeal is enhanced, but the sealing member cannot be properly positioned between the decorative member and the vehicle body
Solution Approach 1:
The side wall is segmented into the wall part and rib-shaped part, with each segment serving a specific sealing function. The wall part handles sealing with the window glass, while the rib-shaped part provides a sealing surface for the vehicle body, ensuring reliable sealing member positioning despite the projecting front surface design.
Solution Approach 2:
Different parts of the side wall have different local qualities and functions: the wall part provides a smooth sealing surface for the window glass, while the rib-shaped part provides a protruding sealing surface for the vehicle body. This local differentiation ensures reliable sealing at both interfaces.
2Manufacturing precision
If high precision molding is required to achieve proper sealing and visual appeal, then the quality is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The rib-shaped part is designed with a gradual increase in bulge amount from the wall part toward the exterior member. This parameter change allows the sealing structure to accommodate molding variations and tolerances, reducing the need for extremely high precision molding while maintaining sealing effectiveness and visual appeal.
Data Source
AI summary
A decorative structure (15) for a vehicle is provided with a left sealing member (27) between a left illuminating light (23) and a rear-window glass (25). The left illuminating light (23) is provided with a lens surface section (51) having a projecting surface section (56) which projects toward rear trim (22); a lens inner wall (66) opposing the left-side surface (45) of the rear window glass (25); and a rib-shaped section (53) projecting from the projecting surface section (56) toward the back-door (21) side. The left seating member (27) connects the lens-inner-wall surface (66a) of the lens inner wall (66) and the rib-wall surface (75a) of the rib-shaped section (53).