Bumper Grille Lighting Structure for Frontal Impact Protection
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Solution Overview
Problem
Existing bumper grille lighting devices are vulnerable to damage during frontal impacts, and existing impact absorption solutions do not adequately protect these components.
Innovation Solution
The lighting device is designed with varying distances between the rear housing and the front wall, incorporating features like horizontal shoulders, inclined portions, and grooves in the diffusion plate to minimize damage by allowing the grille to deform without contacting the crossbeam during an impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lighting device is equipped with standard uniform spacing between rear housing and front wall, then the structure is simple and easy to manufacture, but the lighting device is vulnerable to damage during frontal impacts
Solution Approach 1:
The patent applies local quality by creating non-uniform spacing between the rear housing and front wall. Specifically, the distance varies along the vertical direction, with a first distance at the upper end and a second distance at the lower end that is less than the first distance. This localized variation in spacing provides impact absorption capability at the lower end while maintaining structural simplicity elsewhere, resolving the contradiction between reliability and device complexity.
2Reliability
If the rear housing is positioned closer to the front wall uniformly, then the device complexity is reduced, but the lighting device cannot absorb impact energy effectively
Solution Approach 1:
The patent implements local quality by positioning the rear housing at different distances from the front wall at different locations. The lower end has a reduced distance (second distance) compared to the upper end (first distance), creating a localized impact absorption zone where the grille can deform during frontal impacts without damaging the lighting device components.
3Object-affected harmful factors
If the lighting device components are positioned close to the front wall, then the overall device length is reduced, but the components are more susceptible to impact damage
Solution Approach 1:
The patent applies local quality by creating a gradient in the spacing between the rear housing and front wall. The first distance at the upper end provides protection for the lighting components, while the second distance at the lower end (which is less than the first) allows controlled deformation. This localized differentiation protects components from impact damage while managing the overall device length.
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 configuration minimizes damage to the lighting device by ensuring the printed circuit board and light source remain undamaged during a frontal impact, maintaining functionality.
Implementation Method 1
a diffusion plate, with an upper edge of said diffusion plate being positioned opposite the light source
Implementation Method 2
configured so that: a first distance separates the rear housing and the front wall at the upper end; and a second distance separates the rear housing and the front wall at the lower end; the second distance being less than the first distance
Data Source
AI summary
The invention relates to a lighting device (20) for a grille (16) of a bumper, extending between an upper end (22) and a lower end (24) and comprising a rear housing (26) and a front wall (28) defining an internal space (40);the lighting device further comprising a printed circuit board (30), a light source (32), and a diffusion plate (34), received in the internal space; the printed circuit board (30) and the light source (32) being positioned at the upper end (22) of the lighting device;the lighting device being configured so that: a first distance (42) separates the rear housing and the front wall at the upper end (22); and a second distance (44) separates the rear housing and the front wall at the lower end (24); the second distance being less than the first distance.