Snap-Fit Mounting for Automotive Headlamp Control Units
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Solution Overview
Problem
The existing assembly methods for electronic headlamp control boxes on motor vehicles require manual screwing operations, leading to significant labor time and preventing fully automated assembly, which is inefficient for mass production.
Innovation Solution
A system comprising an interface plate secured to the electronic box, an assembly element with a central part forming a tube with open ends, and a receiving base with a bottom and fixing elements, allowing the box to be automatically fixed in place without the need for manual screwing tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw barrels and fixing flanges with screws are used to fix the electronic box on the projector, then the connection is secure and reliable, but the assembly requires manual screwing operations which increase labor time and prevent full automation
Solution Approach 1:
The patent replaces the traditional screw-based mechanical fastening system with a snap-fit mechanism. The assembly element features a pressing portion that inserts into a receiving cavity, where a resilient member (elastic element) provides automatic locking through elastic deformation. This substitution eliminates the need for manual screwing operations while maintaining secure connection, enabling automated assembly processes.
Solution Approach 2:
The resilient member (elastic element) automatically performs the fastening function through its elastic properties. When the pressing portion is inserted into the receiving cavity, the elastic element deforms and then rebounds to lock the assembly in place without requiring external tools or manual intervention. The system serves itself by using the material's inherent elastic properties to create the fastening action.
2Strength
If screwing operations are used to fix the electronic box, then adequate fixing strength is achieved, but appropriate tools and operator intervention are required which reduce productivity
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a snap-fit mechanism. The assembly element features a pressing portion that inserts into a receiving cavity, where a resilient member (elastic element) provides automatic locking through elastic deformation. This substitution eliminates the need for manual screwing operations while maintaining secure connection, enabling automated assembly processes.
Solution Approach 2:
The patent changes the physical state and properties of the fastening mechanism from rigid screw threads to elastic deformation. The resilient member is designed to deform within its elastic limit during insertion and then rebound to provide continuous locking force. This parameter change from rigid mechanical engagement to elastic engagement enables faster assembly while maintaining adequate fixing strength.
3Reliability
If traditional screw fixing methods are used, then the electronic box is securely mounted, but the assembly process cannot be carried out entirely automatically requiring significant labor time
Solution Approach 1:
The patent replaces the traditional screw-based mechanical fastening system with a snap-fit mechanism. The assembly element features a pressing portion that inserts into a receiving cavity, where a resilient member (elastic element) provides automatic locking through elastic deformation. This substitution eliminates the need for manual screwing operations while maintaining secure connection, enabling automated assembly processes.
Solution Approach 2:
The resilient member (elastic element) automatically performs the fastening function through its elastic properties. When the pressing portion is inserted into the receiving cavity, the elastic element deforms and then rebounds to lock the assembly in place without requiring external tools or manual intervention. The system serves itself by using the material's inherent elastic properties to create the fastening action.
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
Facilitates quick and easy mounting of the electronic box on the headlamp, reducing assembly time and enabling partially automated or even fully automated assembly processes, thus improving production efficiency.
Implementation Method 1
a spring washer with claw, so that, when the case is placed in the base, the washer elastic comes crimp the fixing stud
Data Source
Figure 1
Figure 2~5
Figure 6~9
AI summary
The invention consists of a system for assembling an electronic control unit (21) onto a lighting device, for example an automotive headlight, controlled by said unit. The system comprises an interface plate (23) integral with the unit (21) and located at one end thereof; an assembly element (22) configured to be fixed to the unit (21) via the interface plate (23); and a receiving base (24), integral with the wall of the equipment, configured to form a receptacle in which the unit (21) equipped with the assembly element (22) can be housed, the assembly element (22) then being in contact with the bottom (53) of said receptacle. The assembly element (22) and the base (53) of the receiving base (24) have fastening elements (61, 54), configured to cooperate so as to ensure that the housing (21) is held in place in the base (24) after it has been inserted into the latter.