Rearview Mirror Indicator Assembly With Pin-Guided Icon Alignment
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Solution Overview
Problem
Existing rearview mirror assemblies face challenges in ensuring precise alignment and assembly of components during the manufacturing process, particularly in establishing indicator icons through the mirror reflector, which can lead to inaccuracies and inefficiencies.
Innovation Solution
The use of nest fixtures and locator pins with corresponding apertures ensures precise alignment of the mirror reflective element, back plate, and heater pad, followed by a laser ablation process to create indicator icons at specific locations on the mirror reflector, allowing for accurate and efficient assembly of the blind zone indicator module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional assembly methods are used for mirror reflective element sub-assembly, then the assembly process is simpler, but alignment precision of components deteriorates
Solution Approach 1:
Locator pins are introduced as intermediary elements that mediate between the support fixture and component apertures. These pins physically enforce precise alignment by fitting into corresponding apertures, thereby achieving high alignment precision without requiring complex alignment procedures or skilled manual adjustment.
Solution Approach 2:
The patent replaces manual alignment procedures with a mechanical constraint system consisting of locator pins and apertures. This mechanical system automatically enforces precise positioning through physical interference fit, eliminating the need for complex measurement and adjustment mechanisms while maintaining high precision.
2Manufacturing precision
If manual alignment methods are used during assembly, then the equipment is simpler, but assembly accuracy deteriorates
Solution Approach 1:
The assembly fixture performs self-alignment through the locator pin and aperture system. When components are placed on the fixture, the locator pins automatically guide them into the correct positions through physical constraint, eliminating the need for external alignment tools or manual adjustment procedures. The system serves itself by design rather than by active control.
3Manufacturing precision
If conventional heating methods are used for heater pad attachment, then the equipment is simpler, but alignment accuracy deteriorates
Solution Approach 1:
The support fixture merges multiple functions into a single integrated structure: it provides mechanical support for components, incorporates locator pins for alignment, and integrates a heating element for heater pad attachment. This consolidation achieves precise alignment and effective heating without requiring separate alignment tools and heating equipment, thereby managing complexity through functional integration.
4Manufacturing precision
If traditional laser ablation positioning is used, then the setup is simpler, but indicator icon positioning accuracy deteriorates
Solution Approach 1:
The locator pins and apertures perform preliminary positioning of the mirror reflective element and back plate before the laser ablation process begins. This pre-alignment ensures that when the laser subsequently creates the indicator icon, the positioning is already accurate, eliminating the need for complex real-time positioning systems or sophisticated control algorithms during the ablation process itself.
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 method enables precise alignment and accurate formation of indicator icons, enhancing the assembly process and ensuring that the indicator module is correctly positioned for optimal functionality, improving the overall quality and reliability of the rearview mirror assembly.
Implementation Method 1
An indicator icon is established (via laser ablation) through the mirror reflector of the mirror reflective element
Data Source
AI summary
A method for assembling a mirror reflective element sub-assembly for a vehicular exterior rearview mirror assembly includes assembling an indicator module by heat staking a printed circuit board at a receiving part of a housing to form a housing and printed circuit board assembly and dispensing potting material at the printed circuit board to seal the printed circuit board at the housing and aligning and taping a diffuser at the housing. A back plate is provided that has an indicator attaching portion for attaching the indicator module. The back plate is placed at a support fixture and a mirror reflective element is attached at the back plate. The indicator module is attached at the indicator attaching portion of the back plate. Light emitted by the indicator module, when electrically powered to emit light, passes through the mirror reflective element at an aperture of the back plate.