Vehicle Circuit Card Assembly With Aligned Fastener Apertures
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Solution Overview
Problem
Existing circuit card assemblies for vehicles require significant structural changes to both chassis and circuit card unit designs to accommodate different securing methods, such as wedge-lock retainers and friction card guides, making it difficult to operate in both scenarios without substantial design modifications.
Innovation Solution
A circuit card assembly design that includes a printed circuit board (PCB), a wedge-lock retainer unit, and a support bracket, where the fastener apertures are aligned to utilize existing chassis apertures for both friction card guides and wedge-lock retainers, minimizing design changes by allowing securement through existing apertures and facilitating mechanical connections with the vehicle chassis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit card assembly uses a wedge-lock retainer or friction card guide, then it can be securely mounted to the vehicle chassis, but significant structural changes are required to both chassis and circuit card unit designs
Solution Approach 1:
The circuit card assembly is designed with a support bracket and aligned fastener apertures that enable it to function with both wedge-lock retainers and friction card guides using the same chassis apertures. This multi-functionality allows the assembly to be securely mounted through existing chassis apertures without requiring separate structural modifications for different mounting methods, thereby reducing design complexity while maintaining mounting security
2Ease of manufacture
If the circuit card assembly is designed to work with existing chassis apertures, then design changes are minimized, but the assembly must accommodate multiple mounting methods simultaneously
Solution Approach 1:
The support bracket is designed with fastener apertures that align with both the circuit card unit and the vehicle chassis, enabling the same assembly to accommodate both wedge-lock retainer and friction card guide mounting methods. This universal design allows the assembly to work with existing chassis apertures while maintaining compatibility with multiple mounting methods, thereby reducing design modification costs without sacrificing adaptability
Solution Approach 2:
The mounting system is segmented into distinct functional components: the circuit card unit with its own apertures, the support bracket with alignment apertures, and the chassis with existing apertures. This segmentation allows each component to be optimized independently while maintaining overall compatibility with multiple mounting methods through the aligned aperture configuration
Data Source
Figure 1~3
Figure 4~5
Figure 6A~6C
AI summary
The circuit card assembly (600) includes a circuit card unit (604), a wedge-lock retainer unit (606), and a support bracket (608). The circuit card unit has a printed circuit board (99) defining a first fastener aperture. The wedge-lock retainer unit defines a second fastener aperture (624). The support bracket (608) includes first and second elements (611, 613). The first element (611) defines a third fastener aperture (626) and the second element (613) defines a fourth fastener aperture (630). The printed circuit board (99), the wedge-lock retainer unit (606), and the support bracket (608) are arranged with one another such that the first fastener aperture, the second fastener aperture (624), and the third fastener aperture (626) are aligned with one another and such that the fourth aperture (630) is oriented in alignment with a chassis aperture (632) of the chassis (610).