Vehicle Lighting Finishing Element Attachment Mechanism
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Solution Overview
Problem
Current vehicle lighting devices face issues with aesthetic finishing elements, such as bezels, detaching at stressed points due to complex and curved shapes, leading to aesthetic and functional problems like noise and optical malfunctions.
Innovation Solution
A lighting device design featuring a cup-shaped housing with a transparent lens and an annular or semi-annular finishing element, utilizing a support and channel-shaped profiled element with pins or reliefs to securely attach the finishing element, preventing detachment and maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the finishing element is fixed only by glue on curved surfaces, then the manufacturing process is simple, but the finishing element detaches at stressed points
Solution Approach 1:
The fixing system is segmented into multiple components: a support structure with multiple fixing points, pins for mechanical anchoring, and glue for bonding. This segmentation allows each component to perform its specific function - pins provide mechanical retention at critical points while glue provides surface bonding, together ensuring reliable attachment without complex manufacturing
Solution Approach 2:
The support structure is made from composite material comprising a rigid backbone for structural integrity and elastically deformable synthetic plastic material for adapting to curved surfaces. This composite approach allows the support to maintain its shape and fixing positions while conforming to the lens curvature, preventing detachment at stressed points
2Shape
If the bezel is bent to fit curved shapes, then it can accommodate the lens profile, but partial detachments occur at stressed points
Solution Approach 1:
The support structure exhibits local quality variations: it has a rigid backbone for overall structural support and elastically deformable sections for local adaptation to curved surfaces. The pins are strategically positioned at high-stress curved areas to provide enhanced mechanical retention where detachment risk is highest, while glue provides continuous bonding across the surface
3Shape
If a complex curved bezel is produced to match the lens profile, then aesthetic appearance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of making the finishing element itself complex and curved to match the lens profile, the invention inverts the approach by using a support structure that conforms to the curved surface while carrying a simpler finishing element. The support structure absorbs the complexity of adapting to the lens shape, allowing the visible finishing element to maintain a simpler, more manufacturable form
4Quantity of substance
If the finishing element is made smaller in size, then material cost and weight are reduced, but attachment reliability may be compromised
Solution Approach 1:
The support structure uses elastically deformable synthetic plastic material that can be made as a thin, flexible component conforming to the lens surface. This thin-film approach reduces material quantity and weight while the elastic deformability allows the support to adapt to curved surfaces and maintain reliable attachment through its flexibility rather than material volume
Data Source
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AI summary
A lighting device comprising a cup-shaped housing (3) and a transparent lens (4), that closes the housing in a fluid tight manner, an outer surface (7) of the lens being provided with a finishing element (6) comprising a support (8) facing the lens (4) and a channel-shaped profiled element (9) fitted above the support (8), on the side opposite to the lens; wherein at least a pin or a relief (14) is operatively associated with the lens (4) and with at least a second stretch (16) of the support (8) arranged at a curved portion (18) of the lens or of the housing, a second stretch (19) of the profiled element (9) being coupled integral to the second stretch (16) of the support (8) so as to conceal the support (8) and said pin or relief on the side of the outer surface (7) of the lens.