Bumper Screen for Chassis Protection Against Light Source Impact
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Solution Overview
Problem
Existing bumper designs fail to effectively protect the vehicle chassis from impacts, particularly when lighting devices are displaced towards the chassis, leading to potential damage and increased repair costs, with existing solutions either impractical due to space constraints or excessively costly and heavy.
Innovation Solution
Incorporating a molded screen on the rear wall of the bumper, which serves as an obstacle to prevent light sources from impacting the chassis, using a wing and lug configuration that allows for electrical connection while providing structural support and flexibility to absorb minor impacts without deforming the bumper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rear face of the lighting device is placed at a significant distance from the chassis to provide space for receiving the lighting device when expelled, then the chassis is protected from impact, but the space requirements increase and may be impossible to satisfy depending on vehicle configuration
Solution Approach 1:
The patent introduces a screen element arranged in a different spatial dimension (between the lighting device and chassis) rather than increasing the distance along the longitudinal axis. This allows protection functionality to be added without increasing the overall space requirement between the lighting device and chassis.
Solution Approach 2:
The screen acts as an intermediary element positioned between the lighting device and the chassis. It intercepts and absorbs the impact forces of expelled lighting device components, protecting the chassis without requiring increased spacing.
2Object-affected harmful factors
If parts are attached to the chassis interposed between the lighting devices and the structural elements to absorb thrust forces, then the chassis is protected from impact, but the vehicle mass increases
Solution Approach 1:
The screen is merged with the existing bumper structure, specifically with the rear wall of the bumper housing. This integration allows the protection function to be added without requiring separate protective parts attached to the chassis, thereby avoiding increased vehicle mass.
Solution Approach 2:
The bumper structure itself provides the protection function through the integrated screen, rather than requiring additional protective components. The screen is designed to deform and absorb impact forces, enabling the bumper to protect the chassis using its own structural elements.
3Object-affected harmful factors
If a screen is disposed outside the housing facing the opening to protect the chassis, then the chassis is protected from light source impact, but the device complexity increases
Solution Approach 1:
The screen is molded as an integral part of the bumper housing, combining the protective screen function with the existing structural component. This integration reduces device complexity compared to adding a separate protective element.
Solution Approach 2:
The rear wall of the bumper housing serves multiple functions: it provides structural support for the lighting device housing and simultaneously incorporates the screen for chassis protection. This multi-functionality reduces the need for additional components.
Data Source
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AI summary
The invention relates to a bumper (1) for a motor vehicle, to an assembly comprising the said bumper (1) and at least one lighting device (4) mounted on the bumper (1), and to a motor vehicle equipped with the said assembly. The bumper (1) comprises at least one housing (5) to accept a lighting device (4) comprising at least one light source (8, 8'). One wall of the bumper (1) comprising, passing through it, at least one opening (12, 2') the dedicated purpose of which is to allow a socket (13, 13') of the said at least one light source (8, 8') to emerge from the housing (5). The said wall (3) of the bumper (1) comprises at least one screen (14, 14'), arranged outside the housing (5) facing the said opening (12, 12'), so as to act as an obstacle preventing the light source (8, 18') from being thrown towards the chassis (6) if the bumper (1) is knocked.