M12 Connector Sheet Metal Closure for Potting Ingress
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Solution Overview
Problem
Existing M12 connectors face challenges in mechanical stress resistance, particularly from vibrations, and require cost-effective designs that prevent potting material from entering cavities and ensure secure screw connections.
Innovation Solution
A connector design featuring a female socket contact made from a single piece of sheet metal with a closure to prevent potting material ingress and a locking ring to inhibit unscrewing, combined with a modular structure for customizable components like shielding and locking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If female socket contacts are kept free during manufacture to accommodate male socket contacts, then the cavity remains accessible for assembly, but potting material can penetrate into the cavity from the wiring area
Solution Approach 1:
The female socket contact is divided into functionally distinct areas: a wiring area for cable connections and a receiving area for male socket contacts. The closure acts as a separator between these areas, allowing the wiring area to be potted while keeping the receiving area accessible and free of potting material.
Solution Approach 2:
The closure is extracted as a distinct functional element from the continuous sheet metal, creating a barrier that selectively blocks potting material while maintaining structural integrity and electrical conductivity of the female socket contact.
2Reliability
If connectors are designed to withstand mechanical stresses and vibrations, then reliability improves, but manufacturing complexity and costs increase
Solution Approach 1:
Multiple functions are merged into the female socket contact itself: structural support, electrical conductivity, cavity formation, and potting material barrier (via the closure). This eliminates the need for separate protective components while maintaining reliability under mechanical stress and vibrations.
Solution Approach 2:
The sheet metal female socket contact serves multiple purposes simultaneously: providing mechanical strength for vibration resistance, conducting electricity, forming the receiving cavity, and blocking potting material through its integrated closure, thereby reducing overall device complexity.
3Duration of action of stationary object
If connectors are designed for repeated assembly and disassembly (100+ cycles), then durability improves, but the screw connection may loosen due to vibrations
Solution Approach 1:
The locking ring is designed to preemptively counteract the loosening effect of vibrations by providing a mechanical lock that prevents the screw connection from rotating loose during repeated assembly cycles and vibration exposure.
4Ease of manufacture
If a one-piece sheet metal design is used for the female socket contact, then manufacturing cost and complexity are reduced, but the need for closures to prevent potting material ingress becomes critical
Solution Approach 1:
The closure provides localized protection at the critical interface between the wiring area and receiving area. Rather than requiring complex overall design, the local addition of the closure prevents potting material penetration while maintaining the simplicity and cost-effectiveness of the one-piece sheet metal construction.
Data Source
Figure 1A~1B
Figure 2A~3B
Figure 4A~4B
AI summary
In a connector (100; 100') with at least one female socket contact (110), the female socket contact (110) has a metallic plate. The plate is connected to a cable (130) connected to the connector at a wiring area (112) of the female socket contact (110). The plate has a cavity at a receiving area (111) of the female socket contact (110) for receiving a male socket contact (210). A portion of the plate is designed as a closure (113) that separates the cavity of the receiving area (111) from the wiring area (112).