Card Edge Connector Retainer with Abutting Stop Arm
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Solution Overview
Problem
The existing card edge connectors are prone to breaking due to excessive stress or strain on the operating section when attempting to eject a daughter board, as the rigid stop arm does not extend to the outer side of the operating section, leading to potential damage during the ejection process.
Innovation Solution
A card edge connector design featuring a retainer with a resilient retention arm and a rigid stop arm that diverges transversely, including an abutting section behind the operating section to limit deflection and prevent excessive stress, ensuring the stop arm extends to the outer side of the operating section for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stop arm is located only at the outer side of the locking section, then the structure is simpler, but the operating section is prone to breaking due to excessive stress during ejection
Solution Approach 1:
The stop arm is extended in a new spatial direction to reach the outer side of the operating section. This dimensional extension allows the stop arm to provide support at the critical location without adding complex structural elements, effectively preventing breaking during ejection while maintaining structural simplicity
Solution Approach 2:
The extended stop arm acts as an intermediary support element between the locking section and the operating section. By positioning the stop arm at the outer side of the operating section, it provides intermediate support that distributes stress and prevents the operating section from breaking under excessive load during the ejection process
2Ease of manufacture
If the stop arm does not extend to the outer side of the operating section, then the manufacturing is easier, but excessive stress causes the operating arm or stop arm to break easily
Solution Approach 1:
The stop arm is extended along the elongated direction of the retainer to reach the outer side of the operating section. This simple dimensional extension during manufacturing provides the necessary structural support to resist excessive stress during ejection, without requiring complex manufacturing processes or additional components
3Stability of the object's composition
If the rigid stop arm is extended to the outer side of the operating section, then the structural integrity is improved, but the device complexity increases
Solution Approach 1:
The stop arm serves multiple functions: it provides structural support to prevent breaking during ejection, guides the ejection motion, and maintains the resilience of the retention arm. By making the stop arm multi-functional, the patent achieves improved structural integrity without adding separate components, thus avoiding increased device complexity
Solution Approach 2:
The stop arm is extended in the elongated direction to reach the outer side of the operating section. This simple dimensional change provides comprehensive structural support and stability throughout the retainer assembly, achieving enhanced structural integrity without requiring complex multi-component designs
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 enhanced retainer design effectively prevents the operating section from being broken during daughter board ejection by distributing stress and providing additional support, thereby improving the structural integrity and reliability of the card edge connector.
Implementation Method 1
The retainer has a resilient retention arm which is deflectable from an initial position to a final position
Implementation Method 2
the stop arm has an abutting section behind the operating section along a fourth direction perpendicular to the operating section to limit a deflection of the operating section
Data Source
AI summary
A card edge connector includes an elongated housing, a plurality of contacts retained to the housing, and a retainer located at one end of the housing along an elongated direction of the housing. The housing has a pair of side walls and a central slot between the side walls. The retainer has a resilient retention arm and a rigid stop arm diverging from the retention arm along a transverse direction perpendicular to the elongated direction. The retention arm has a locking section extending along the elongated direction to lock a daughter board and an operating section obliquely extending from the locking section along a third direction different from both elongated direction and transverse direction. The stop arm has an abutting section behind the operating section along a fourth direction perpendicular to the operating section to limit a deflection of the operating section.