Box-Shaped Headliner Attachment Structure for Sunroof Gap Elimination
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Solution Overview
Problem
Existing attachment structures for headliners in vehicles with sunroof openings fail to securely fasten the headliner along the edges of the sunroof opening, leading to gaps and an unsightly appearance.
Innovation Solution
A headliner assembly with a dimensionally stable substrate and molded reinforcement featuring box-shaped attachment structures with side walls, a top wall, and a reinforcing wall, which includes fasteners like hook and loop strips to securely attach the headliner to the vehicle roof, minimizing gaps and ensuring a finished appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional attachment structures are used for headliners in vehicles with sunroof openings, then the headliner can be attached to the roof, but gaps form along the edges of the sunroof opening resulting in an unsightly appearance
Solution Approach 1:
The attachment structure transitions from a conventional flat configuration to a three-dimensional box-shaped structure with vertical side walls extending downward from the headliner substrate toward the vehicle roof. This dimensional change allows the fasteners to engage more effectively with the roof surface, securing the headliner along the sunroof opening edges and eliminating gaps that would otherwise form.
Solution Approach 2:
The molded reinforcement is divided into multiple box-shaped attachment structures distributed along the sunroof opening edges. Each box-shaped structure contains fasteners and acts as an independent attachment unit. This segmentation allows targeted reinforcement at gap-prone locations while maintaining overall headliner attachment security.
2Shape
If the headliner is securely fastened along the sunroof opening edges to eliminate gaps, then the appearance is improved, but the attachment structure becomes more complex
Solution Approach 1:
The reinforcement structure and attachment structures are merged into a single molded reinforcement component. The box-shaped attachment structures are integrated directly into the reinforcement, eliminating the need for separate attachment components. This merging reduces overall device complexity while achieving gap elimination along the sunroof opening edges.
Solution Approach 2:
The molded reinforcement appears to be constructed from composite materials that provide both structural reinforcement and integrated attachment functionality. This composite approach allows the single component to serve multiple functions: reinforcing the headliner substrate and providing secure attachment points, thereby simplifying the overall attachment structure.
Data Source
AI summary
A headliner assembly covers an inner surface of a motor vehicle roof having a sunroof opening. The headliner assembly includes a dimensionally stable substrate having an upper surface facing the inner surface of the motor vehicle roof and an opposite bottom surface. The headliner assembly also includes a molded reinforcement disposed along the upper surface of the substrate. The molded reinforcement has a main wall and a box-shaped attachment structure supporting a fastener for attaching the headliner assembly to the inner surface of the motor vehicle roof. The attachment structure has spaced apart pair of side walls extending between the main wall and the inner surface of the motor vehicle roof. The attachment structure has a top wall extending between tie side walls of the attachment structure. The attachment structure also includes a reinforcing wall extending between the top wall and the side walls. The reinforcing wall contacts the substrate to control the distance between the substrate and the molded reinforcement.