Vehicle Trim Layer Structure for Smooth Appearance Transitions

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Solution Overview

Problem

Existing vehicle trim elements often have abrupt transitions between areas with different appearances, lacking a smooth and aesthetically pleasing transition zone.

Innovation Solution

A trim element design featuring a first appearance layer with openings, a second appearance layer extending over the first layer in a transition zone, and a support layer that presses the second layer into the openings, creating a continuous and varied external surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If multiple appearance layers with different materials are used to create varied aesthetics, then the aesthetic quality is improved, but the transition between zones becomes abrupt and visually discontinuous

Engineering Contradiction:
Improveaesthetic qualityVSAvoidtransition smoothness
Core Design Contradiction:
Ease of manufactureVSShape

Solution Approach 1:

The trim element is divided into multiple appearance layers (first appearance layer and second appearance layer) with different materials and visual characteristics. Each layer can be independently selected and positioned, allowing for segmented design freedom while maintaining overall continuity through the layered structure

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The transition between different appearance zones is achieved not through gradual material blending in the planar dimension, but by stacking multiple appearance layers in the vertical dimension. The first appearance layer and second appearance layer are positioned at different heights, with the support layer providing structural elevation to create a stepped transition that is visually interesting rather than abrupt

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Shape

If a support layer is added to press the second appearance layer into openings, then the transition zone continuity is improved, but the manufacturing complexity increases

Engineering Contradiction:
Improvesurface continuityVSAvoidlayer structure complexity
Core Design Contradiction:
ShapeVSDevice complexity

Solution Approach 1:

The support layer serves multiple functions simultaneously: it provides structural support for the appearance layers, creates the vertical positioning that enables the transition zone, and presses the second appearance layer into the openings of the first appearance layer to ensure visual continuity. This merging of functions reduces the need for additional separate components

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The support layer is strategically positioned only where needed - specifically to press the second appearance layer into the openings in the first appearance layer within the transition zone. This localized application of structural support achieves surface continuity precisely where required without unnecessarily complicating the entire structure

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP4436836B1Liner element comprising an outer surface having different appearances
Publication Date: 2025.09.03 FAURECIA INTERIEUR IND
  • EP4436836B1 patent drawingFigure 1
  • EP4436836B1 patent drawingFigure 2
  • EP4436836B1 patent drawingFigure 3

AI summary

The invention relates to a liner element (1) which defines an outer surface (2) that forms a visible region of the liner element, said liner element comprising a first appearance layer (4) that forms a first region of the outer surface (2) in which only said first appearance layer (4) is visible, and a second appearance layer (6) that forms a second region of the outer surface (2) in which only said second appearance layer (6) is visible. The outer surface comprises a transition region extending between the first region and the second region, the first appearance layer (4) extending over the second appearance layer (6) and comprising a plurality of openings (20) closed by the second appearance layer (6) in said transition region such that the first appearance layer (4) and the second appearance layer (6) are visible in said transition region.