Light-Transmitting Vehicle Trim Panel With Elastic Masking Zone
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Solution Overview
Problem
Conventional motor vehicle trim panels are fragile and prone to damage during low-speed impacts due to their rigid structure, which increases repair costs and vulnerability.
Innovation Solution
A trim panel design featuring a light transmission zone made of a first plastic material and a contiguous masking zone made of a second, more flexible plastic material, reducing the overall rigidity and enhancing flexibility to absorb impacts without plastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the masking zone is made of rigid material (same as light transmission zone), then the trim panel has high structural strength, but it becomes more fragile and susceptible to damage during impact
Solution Approach 1:
The patent applies different material properties to different zones of the trim panel. The light transmission zone uses rigid material for structural strength, while the masking zone uses flexible material for impact resistance. This local differentiation resolves the contradiction by optimizing each zone's material properties according to its specific functional requirements.
Solution Approach 2:
The trim panel is constructed as a composite structure combining rigid and flexible materials in different zones. This composite approach allows the panel to simultaneously achieve structural strength from the rigid light transmission zone and impact resistance from the flexible masking zone, resolving the contradiction between strength and reliability.
2Reliability
If the masking zone is made of flexible material, then the trim panel becomes more resistant to impact damage, but the overall structural rigidity is reduced
Solution Approach 1:
The flexible material is applied locally only to the masking zone rather than the entire panel. This localized flexibility provides impact resistance where needed while preserving the overall structural rigidity of the panel through the rigid light transmission zone.
Solution Approach 2:
The composite structure combines rigid and flexible materials in a spatially differentiated manner. The rigid light transmission zone maintains structural rigidity, while the flexible masking zone provides impact resistance, achieving both requirements simultaneously through material composition.
3Ease of manufacture
If the trim panel uses a single-layer rigid structure, then manufacturing is simpler, but the panel is more prone to plastic deformation during low-speed impacts
Solution Approach 1:
The patent uses a bi-layer composite structure with rigid and flexible materials. While slightly more complex than single-layer construction, this composite approach provides superior damage resistance during low-speed impacts by allowing elastic deformation in the flexible masking zone, preventing plastic deformation of the entire panel.
Solution Approach 2:
The flexible masking zone acts as a pre-positioned cushioning element that absorbs impact energy through elastic deformation before it can cause damage to the rigid light transmission zone or result in permanent plastic deformation of the panel.
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
The flexible masking zone allows elastic deformation, reducing the risk of damage and improving mechanical resistance to impacts, thereby minimizing repair costs and maintaining the panel's integrity during low-speed collisions.
Implementation Method 1
the relative flexibility of the masking zone allows elastic deformation of the latter, allowing movement of the transmission zone
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The trim panel (6) for motor vehicle (1) comprises: - at least one light transmission zone (7), made of a first plastic material suitable for allowing light transmission, - at least one masking zone (8) contiguous to the transmission zone (7) and made at least partly of a second plastic material more flexible than the first material.