Connector Latch Actuator Torsional Resistance via Rounded Edges
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Solution Overview
Problem
Conventional cable connectors with straight edge actuators are susceptible to tearing under torsional loading due to stress concentration at sharp corners, which affects their reliability in high-speed data transmission applications.
Innovation Solution
The cable connector features a delatching actuator with an elliptical cross-section and rounded edges, eliminating sharp corners to distribute torsional stress and reduce the likelihood of tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a straight edge actuator with sharp corners is used, then the manufacturing is simple and the structure is easy to form, but the actuator is susceptible to tearing under torsional loading due to stress concentration at sharp corners
Solution Approach 1:
The actuator is designed with a rounded cross-section instead of sharp corners, creating a curved geometry that eliminates stress concentration points. This curvature distributes torsional stresses more evenly throughout the actuator body, significantly improving resistance to tearing while maintaining manufacturing simplicity through standard molding processes.
2Strength
If the actuator material is made harder to resist tearing, then the torsional strength improves, but the actuator becomes more brittle and more susceptible to catastrophic failure
Solution Approach 1:
The actuator utilizes a durometer hardness range of 60-80, representing an optimized parameter range that balances torsional strength with ductility. This specific hardness parameter allows the actuator to resist tearing while maintaining sufficient toughness to prevent catastrophic brittle failure, achieving both strength and reliability simultaneously.
Solution Approach 2:
The actuator is formed from polymeric materials that exhibit viscoelastic properties, combining the benefits of plasticity and elasticity. This material composition allows the actuator to deform under torsional load without immediate failure, providing both strength and reliable failure modes through the inherent properties of polymeric composites.
Data Source
AI summary
A cable connector assembly is disclosed for use in connecting electronic devices together. The connector has a housing and a mating blade in the form of a paddle card to which wires of a cable are terminated. The connector housing supports a latching mechanism with an actuator that when selectively pulled delatches the latching mechanism from its engagement with the housing of an electronic device. The actuator has an elongated pull tab portion that has a rounded edge for at least three of its four sides. This rounded edge eliminates the sharp corners associated with rectangular or square cross sections of conventional pull tabs, thereby removing stress riser points and giving the pull tab greater resistance against tearing when subjected to torsional loading.