Headlight Mask Assembly Using Elastic Fixing Clips
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Solution Overview
Problem
The existing methods for assembling a headlight mask on a motor vehicle headlamp casing, such as gluing, screwing, or ultrasonic welding, are restrictive and costly, leading to inaccuracies in relative positioning and appearance discontinuities due to the need for specific tools and high manufacturing costs.
Innovation Solution
A fastening system using fixing clips with flexible clip feet, chamfered clip heads, and reinforcing projections on the mask's rear face, which are molded into the mask and housing, allowing for elastic deformation and precise alignment without visible fasteners or additional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gluing, screwing, or ultrasonic welding methods are used to fix the mask to the headlamp housing, then the mask can be securely attached, but the manufacturing cost increases and specific tools are required
Solution Approach 1:
The fixing clips are designed to be self-installing through elastic deformation. The flexible clip foot allows the clip to be inserted and then automatically locks into place without requiring external tools or additional fastening operations, making the assembly process self-service and eliminating the need for glue application tools, screwdrivers, or ultrasonic welding equipment
Solution Approach 2:
The patent replaces complex mechanical fastening systems (screws, welds, adhesive bonds) with a simple elastic deformation mechanism. The fixing clip uses the elasticity of its flexible foot to transform from a loose state during insertion to a locked state during attachment, substituting multiple manufacturing operations with a single mechanical action
2Reliability
If conventional fixing methods are used, then the mask can be attached to the housing, but inaccuracies in relative positioning occur leading to appearance discontinuities
Solution Approach 1:
The fixing clips are pre-integrated into the mask structure during molding, with their position and orientation predetermined. This preliminary action ensures that when the mask is assembled to the housing, the clips automatically align with the corresponding retaining elements, eliminating positioning inaccuracies that would occur with post-assembly fastening methods
Solution Approach 2:
The fixing clips are nested within the mask structure, with the flexible clip foot and clip head forming a hierarchical integration. The clip is molded as part of the mask, creating a nested relationship where the fastening mechanism is contained within the overall mask assembly, ensuring precise relative positioning between mask and housing
3Reliability
If screws are used to fix the mask, then the mask can be securely attached, but multiple screws and thread integration are required increasing device complexity
Solution Approach 1:
The patent extracts the fastening function from separate screw fasteners and integrates it directly into the mask structure through molded fixing clips. This extraction eliminates the need for multiple discrete screws and the structural modifications (threads) they would require, reducing device complexity while maintaining attachment security
Solution Approach 2:
The fixing clip combines multiple functions into a single integrated element: the flexible foot provides insertion flexibility, the clip head provides locking capability, and the chamfer provides guiding. This merging of functions into one component eliminates the need for separate screws, washers, and thread structures, significantly reducing device complexity
4Reliability
If ultrasonic welding is used to fix the mask, then the mask can be securely attached, but additional manufacturing cost is generated
Solution Approach 1:
The fixing clip is designed as a simple, inexpensive molded component that performs its fastening function through elastic deformation. This disposable-style approach, where a simple elastic element replaces expensive ultrasonic welding operations, significantly reduces manufacturing cost while maintaining secure attachment
Solution Approach 2:
The patent substitutes the expensive ultrasonic welding process with a simple mechanical elastic deformation mechanism. The fixing clip uses the inherent elasticity of the flexible foot material to create a secure mechanical lock, eliminating the need for ultrasonic welding equipment and associated manufacturing costs
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
This solution enables accurate and cost-effective assembly of the mask on the headlamp casing, reducing manufacturing costs and eliminating the need for specific tools, while ensuring precise positioning and minimizing vibration risks.
Implementation Method 1
a flexible clip foot; the fixing clip having been brought into the assembly position by elastic deformation
Data Source
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AI summary
The present invention relates to a system for assembling a mask onto a headlight housing for a motor vehicle. In the invention, the assembly system is essentially characterized by the fact that it comprises at least one fastening means (105) present on the mask, and in that the mask forms a single piece (100) with at least one reflector (102) of the headlight. The invention has immediate application in the field of motor vehicles.