Integrated Fastener Standoff for Expansion Card Mounting
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Solution Overview
Problem
Existing solutions for mounting expansion cards of varying lengths on a mainboard require multiple protruding standoffs, which complicates heat transfer, electrical grounding, and alignment, and results in a cluttered mainboard layout.
Innovation Solution
A device with a captive fastener system that includes an upper and lower grip portion, a shoulder, and a fastener, which allows for snap-on friction fit onto the expansion card, providing alignment and retention without the need for protruding standoffs, enabling proper spacing and electrical/thermal connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple protruding standoffs are used to mount expansion cards of different lengths, then the mainboard can support various card lengths, but the mainboard layout becomes cluttered and heat transfer is complicated
Solution Approach 1:
The patent combines the standoff and fastener into a single integrated mounting device. The fastener includes an integrated standoff portion that protrudes from the mainboard and a fastening portion that secures the expansion card, eliminating the need for separate protruding standoffs and reducing layout clutter while maintaining support for various card lengths
Solution Approach 2:
The mounting device serves multiple functions: the standoff portion provides spacing and alignment, the gripping portions secure the expansion card edge, and the fastening portion attaches to the mainboard. This multi-functional design replaces multiple separate components (standoffs and fasteners) with a single universal mounting solution
2Reliability
If protruding standoffs are used for mounting, then expansion cards can be secured, but electrical grounding and heat transfer become complicated
Solution Approach 1:
The patent integrates the electrical connection and thermal management functions into the mounting device itself. The fastener includes an electrical connection portion that provides grounding, and the body acts as a heat sink, combining retention, electrical grounding, and heat dissipation in a single component rather than requiring separate protruding standoffs
3Device complexity
If a single mounting device is used for all expansion card lengths, then device complexity is reduced, but the mounting hole layout must remain flat
Solution Approach 1:
The fastener is designed with a shaft that allows vertical movement and play/tolerance, enabling the fastener to accommodate different expansion card lengths. The shaft can slide up and down, and the gripping portions can adjust their position, allowing a single flat mounting hole layout to work with cards of varying lengths
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
The solution allows for efficient mounting of expansion cards of different lengths on a mainboard with a flat mounting hole layout, ensuring proper alignment, heat transfer, and electrical grounding, while reducing clutter and accommodating various card lengths with a single device.
Implementation Method 1
allows for snap-on friction fit onto the expansion card, providing alignment and retention
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3D
AI summary
An example device in accordance with an aspect of the present disclosure includes a grip to secure the device to an expansion card. The grip includes an upper grip portion to receive a fastener, and a standoff formed by a lower grip portion. The standoff is to establish a standoff distance between the expansion card and the mainboard when the device is secured to the expansion card and fastened to the mainboard.