Circuit Board Edge Hooks for Chassis Coupling
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Solution Overview
Problem
Traditional methods for mechanically coupling a circuit board to a chassis in information handling systems often require space for holes or openings, which reduces the availability of space for electrically conductive traces, leading to insufficient mechanical support and potential backplane deflection during the addition or removal of components.
Innovation Solution
The integration of through-holes in the circuit board substrate and hooks with mounting features that engage with structural posts of the chassis, providing enhanced mechanical coupling while minimizing the impact on board and signal routing density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional holes or openings are formed in the circuit board for mechanical coupling, then mechanical support is provided, but the amount of space available for routing electrically conductive traces is reduced
Solution Approach 1:
The patent moves the mechanical coupling features from the board surface (2D plane) to the board edge (3D dimension). Hooks extend perpendicular from the board edge to engage with chassis posts, while through-holes are positioned at the board edge rather than across the routing area. This dimensional shift provides mechanical support without consuming valuable routing space on the board surface.
Solution Approach 2:
The patent uses hooks that replicate the functional purpose of traditional holes but with a different geometric configuration. Instead of holes through the board thickness, hooks extend from the board edge and wrap around chassis posts, creating a mechanical coupling that achieves the same support function while preserving routing space.
2Stability of the object's composition
If sufficient mechanical support is provided through traditional coupling methods, then backplane deflection is prevented, but the device complexity increases due to additional holes and fasteners
Solution Approach 1:
The patent combines multiple functions into the hook structure: mechanical coupling, structural support, and alignment features are all integrated into a single component that extends from the board edge. The through-holes serve dual purposes by providing both mechanical attachment points and alignment references during assembly, reducing the number of separate components needed.
Solution Approach 2:
The hooks serve multiple functions simultaneously: they provide mechanical coupling to the chassis posts, prevent board deflection during component installation, and work with the through-holes to ensure proper alignment. This multi-functionality reduces the need for separate specialized components for each function.
3Strength
If hooks with mounting features are used to engage through-holes, then mechanical coupling is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The through-holes and hook mounting features are designed with predetermined geometric relationships and tolerance zones that guide proper alignment during assembly. The features are configured to naturally align during the insertion process, with the through-holes positioned to receive the hooks in a specific orientation, reducing the precision requirements compared to tight-fit mechanical couplings.
Data Source
AI summary
In accordance with embodiments of the present disclosure, an information handling system may include a chassis and a circuit board. The chassis may have one or more structural posts. The circuit board may mechanically couple to the chassis, and the circuit board may comprise a substrate having formed therein one or more through-holes and one or more hooks each configured to mechanically couple the circuit board to the chassis via a corresponding structural post of the one or more structural posts, each of the one or more hooks comprising one or more mounting features, wherein each of the one or more mounting features is sized and shaped to engage with a corresponding one of the one or more through-holes in order to mechanically couple such hook to the substrate.