Tool-less Expansion Card Retainer Using Resilient Wire
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Solution Overview
Problem
Existing expansion card retention methods in information handling systems, such as those using two-piece plastic clips, are costly and inefficient, requiring tools for installation and removal, which complicates the process and may not be suitable for all types of expansion cards.
Innovation Solution
A single-piece elongated expansion card retaining apparatus made from resilient material, such as metal wire, with a pivotable end, a latching end, and a resiliently deformable coupling section, allowing tool-less installation and removal by rotating the latching end to lock or unlock the card in place, reducing costs and improving ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two-piece plastic retaining clips are used to hold expansion cards, then the cards can be retained in position, but the installation and removal require tools and are complex
Solution Approach 1:
The retention mechanism is divided into distinct functional segments: a retention arm for holding the card, a resilient section for providing locking force, and a actuation section for tool-less release. This segmentation allows each part to perform its specific function efficiently while enabling simple manual operation without tools.
Solution Approach 2:
The retention arm is designed as a dynamic component that can rotate between locked and unlocked positions. The resilient section provides dynamic locking force that automatically engages with the card bay, while the actuation section allows dynamic reconfiguration through simple manual pressure, eliminating the need for tools.
2Reliability
If metal brackets are used to attach PCI cards, then secure retention is achieved, but cost and manufacturing complexity increase
Solution Approach 1:
The material parameter is changed from metal to resilient plastic, fundamentally altering the retention mechanism's properties. This allows the use of injection molding for mass production, significantly reducing manufacturing cost and complexity while maintaining reliable retention through the material's elastic properties and resilient locking action.
Solution Approach 2:
The retention clip utilizes composite material properties by incorporating the resilient section that combines flexibility and strength. This resilient material behavior provides secure retention comparable to metal brackets while enabling cost-effective plastic manufacturing processes.
3Ease of operation
If resilient material is used for the retention apparatus, then tool-less operation is enabled, but the structure becomes more complex
Solution Approach 1:
Multiple functional elements are merged into a single integrated retention apparatus: the retention arm, resilient section, and actuation section form one unified component. This merging eliminates the need for separate parts and assembly steps, enabling tool-less operation while actually simplifying the overall structure compared to multi-component systems.
Solution Approach 2:
The single-piece retention apparatus performs multiple functions simultaneously: it provides card retention, automatic locking through resilient action, and tool-less release capability. This multi-functionality is achieved within a single structural design, avoiding the need for separate mechanisms for each function.
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 provides a cost-effective, tool-less method for retaining expansion cards, enhancing ease of installation and removal while maintaining secure retention, applicable to various types of expansion cards within different information handling system chassis configurations.
Implementation Method 1
at least one resiliently deformable coupling section extending between the pivotable first end and the latching second end
Data Source
AI summary
Apparatus and methods for retention of computer expansion cards and/or card bay covers inside a card bay of an information handling system chassis, and that may include an expansion card retaining apparatus that includes a pivotable first end configured to attachably rotate relative to a securing surface of the information handling system chassis, a latching second end configured to releasably lock the expansion card retaining apparatus in a locking position that prevents rotation of the expansion card retaining apparatus about the pivotable first end, at least one resiliently deformable coupling section extending between the pivotable first end and the latching second end to maintain the latching second end in the locking position, and a retention section extending between the at least one coupling section and the pivotable first end.