Illuminating Link for Retractable Running Board Step
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Solution Overview
Problem
Retractable running boards on high ground clearance vehicles lack effective illumination, making it difficult for users to locate the stepping surface at night or in low lighting conditions.
Innovation Solution
A running board assembly with a light source integrated into a link mechanism, where the light source is activated as the step extends, providing illumination to the stepping surface through a lens and protected by a potting compound and bumper housings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is added to illuminate the running board, then visibility of the stepping surface is improved, but device complexity increases
Solution Approach 1:
The light source is integrated into the link structure itself, merging the illumination function with the mechanical support function. The link serves dual purposes: providing structural support for the running board and housing the light source, thereby reducing overall device complexity while achieving illumination.
Solution Approach 2:
The link is designed as a multi-functional component that simultaneously provides mechanical support, houses the light source, and directs light through an integrated lens. This universal design eliminates the need for separate mounting structures and light housing, resolving the contradiction between added functionality and increased complexity.
2Illumination intensity
If the light source is mounted on the link, then illumination is provided during step extension, but the light source becomes vulnerable to damage
Solution Approach 1:
A bumper housing is provided that surrounds the light source and lens assembly. This protective structure acts as a cushion against potential impacts or damage during the extension and retraction cycles, ensuring the light source remains reliable while maintaining its illumination function.
Solution Approach 2:
The light source is nested within the link structure, which itself is nested within the overall running board assembly. The bumper housing further nests around the light source, creating multiple layers of protection while maintaining compact integration.
3Area of stationary object
If the running board is designed to be retractable, then space efficiency is improved, but illumination during operation becomes more difficult
Solution Approach 1:
The illumination system is dynamically integrated into the moving link mechanism. As the link extends and retracts with the running board, the light source moves accordingly, providing continuous illumination during the dynamic operation. This dynamic integration ensures illumination is available precisely when needed during the retraction/extension process while maintaining space efficiency.
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
Ensures users can clearly locate the stepping surface at night by directing light rays onto the step as it extends, enhancing safety and usability in low-light conditions while protecting the light source from damage.
Implementation Method 1
A light source is fixedly mounted to the link for illuminating the stepping surface
Data Source
AI summary
A running board assembly is provided for a motor vehicle. The running board assembly includes a mounting bracket adapted to be fixedly secured to the motor vehicle. The running board assembly also includes a step having a stepping surface. A link includes an upper end coupled to the mounting bracket and an opposing lower end coupled to the step. A light source is fixedly mounted to the link for illuminating the stepping surface to allow users to locate the step.