Reusable Locking Mechanism for Add-in Card Retention
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Solution Overview
Problem
Conventional methods for retaining and releasing add-in cards in electronic systems, such as smartphones and servers, often require additional tools like screws or soldering, making it difficult to securely connect and disconnect cards of varying lengths without compromising signal and power transmission stability.
Innovation Solution
A tool-less, reusable locking mechanism comprising a member with a retaining portion and a mounting portion that extends through the end of one circuit board and into an opening of another, using engaging beams and projections to securely attach and detach add-in cards of different lengths without additional tools or processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods using screws or soldering are used to retain add-in cards, then the connection stability is improved, but the ease of assembly and disassembly deteriorates
Solution Approach 1:
The retaining member is divided into distinct functional segments: a mounting portion that attaches to the motherboard and a retaining portion that secures the add-in card. This segmentation allows the member to be installed as a single component while providing both stable retention and easy removal capabilities through its modular structure.
Solution Approach 2:
The retaining portion is designed to be movable between retained and released positions, enabling the add-in card to be secured and released through the inherent mechanical design of the member itself, without requiring external tools or additional fastening mechanisms. The member serves both retention and release functions through its own structural features.
2Reliability
If a fixed retaining structure is used to secure add-in cards, then the connection stability is improved, but the adaptability to different card lengths deteriorates
Solution Approach 1:
The retaining portion is designed with movable characteristics, allowing it to adjust its position and configuration based on the length and dimensions of different add-in cards. This dynamic capability enables the same retaining member to effectively secure various card lengths while maintaining stable connections through its ability to adapt to different geometries.
Solution Approach 2:
The retaining member is designed as a universal component that can accommodate multiple types and lengths of add-in cards through its adaptable structure. The combination of a fixed mounting portion and a flexible retaining portion allows a single member design to serve multiple functions across different card configurations, eliminating the need for multiple specialized retainers.
3Reliability
If additional fastening tools like screws are used, then the security of connection is improved, but the device complexity deteriorates
Solution Approach 1:
The mounting portion and retaining portion are combined into a single integrated retaining member that performs both functions simultaneously. This merging eliminates the need for separate fastening tools and components, reducing overall device complexity while maintaining secure connections through the unified structure's inherent mechanical engagement features.
Solution Approach 2:
The retaining member incorporates self-contained mounting and retaining features that eliminate the need for external fastening tools. The member's own structural elements, including the mounting portion's engagement with the motherboard and the retaining portion's movable securing mechanism, provide all necessary functions for secure attachment and easy release without additional components.
Data Source
AI summary
A reusable member configured to retain and release an add-in card to and from a motherboard without additional tools and/or processes. The add-in card has an end inserted into a connector mounted on the motherboard and another end distal from the connector. The member has a retaining portion configured to extend through the distal end of the first circuit board, and a mounting portion configured to extend through an opening of the second circuit board. The retaining portion has a sub-portion configured to move between a first position for retaining the add-in card and a second position for releasing the first circuit board. The mounting portion has a sub-portion disposed and secured in the opening of the motherboard when the member is inserted. Such a configuration enables reusing the member with circuit boards of various dimensions, without additional tools and/or processes.