Duplex Electrical Connector Radius Cast Transition
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Solution Overview
Problem
Existing duplex electrical fittings face difficulties in effortlessly advancing electrical conductors through their internal structure, particularly due to the compact space and transition from two inbound bores to one outbound bore, which often causes the conductors to hang up at the transition area.
Innovation Solution
A one-piece die-cast connector body with a leading end having a cylindrical seat and two bores at the trailing end, equipped with snap rings and cable retaining rings, allows for easy passage of conductors through the transition area by incorporating a radius surface on the end stop to prevent armor layer advancement while allowing conductor passage, and a fastening arrangement for secure attachment to a panel or junction box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the duplex fitting is constructed with a compact internal structure to fit within limited spaces, then the fitting length is reduced and space utilization is improved, but the conductors experience difficulty advancing through the internal structure and tend to hang up at the transition area
Solution Approach 1:
The patent applies curvature by providing a radius surface on the end stop at the transition area where two inbound bores meet the outbound bore. This curved surface prevents conductors from hanging up by guiding them smoothly through the transition, eliminating sharp corners that would cause conductors to catch while maintaining the compact fitting length
Solution Approach 2:
The patent applies local quality by providing the radius surface specifically at the transition area where conductors need guidance, while the rest of the fitting maintains its compact structure. The end stop with radius surface is located only at the critical transition zone, allowing compact overall dimensions while improving conductor passage locally at the problem area
2Manufacturing precision
If the end stop is designed to effectively stop the armor layer advancement, then cable positioning precision is improved, but the conductors may hang up at the transition area
Solution Approach 1:
The end stop is designed with a radius surface (curved surface) at the transition area instead of a sharp edge. This curved surface allows the end stop to effectively stop the armor layer advancement while simultaneously guiding conductors smoothly through the transition from two inbound bores to the outbound bore, preventing conductor hang-ups
Data Source
AI summary
A duplex fitting including a radius cast on transition for effectively stopping advancement of the armor layer of one or more inserted cables while at the same time enabling easy passage of the conductors to the outbound end. Two inbound bores transition to a single outlet bore within the fitting. The duplex fitting includes a one-piece connector body having a leading end with a nose portion and a trailing end with two bores therein. Tubular cable retainers secured within the inbound bores snap-in connection of electrical cables to the trailing end. A fastening arrangement on the nose portion of the duplex fitting enables snap fit connection to a knockout hole in a panel or an electrical box.