Cable-Mounted Connector Crosshatch Outer Contact Retention
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Solution Overview
Problem
Existing electrical connectors do not provide a desirable level of retention force, leading to cable disconnection under moderate pulling forces, which can result in connector failure even when mated.
Innovation Solution
The electrical connector features a cylindrical outer contact with a crosshatch pattern on its surface, which engages and is surrounded by a conductive cable layer, providing increased friction and retention through a crimped ferrule connection, capable of withstanding forces exceeding 120 Newtons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional smooth outer contact surfaces are used, then manufacturing is simple, but retention force between cable and connector is insufficient
Solution Approach 1:
The outer contact surface is designed with a crosshatch pattern that creates localized high-friction regions through intersecting grooves and raised panels, while maintaining a simple overall cylindrical geometry. This localized surface modification increases retention force without requiring complex overall restructuring of the connector body.
Solution Approach 2:
The crosshatch pattern is formed on the curved cylindrical surface of the outer contact, utilizing the curved geometry to distribute the retention force evenly around the cable circumference. The curved surface with patterned texture creates optimal contact mechanics for radial compression and axial retention.
2Reliability
If conventional crimping mechanisms are used, then device complexity is low, but connection reliability under pulling force is insufficient
Solution Approach 1:
The crimping mechanism is designed to apply controlled radial compression force that deforms the ferrule material to match the crosshatch pattern geometry, creating mechanical interlocking. The crosshatch pattern parameters (groove depth, panel height, spacing) are optimized to maximize friction and mechanical engagement during crimping, significantly improving retention force capacity.
3Force
If smooth outer contact surfaces are used, then friction between cable and connector is low, but manufacturing precision requirements are reduced
Solution Approach 1:
The crosshatch pattern creates localized high-friction regions through intersecting grooves and raised panels on the outer contact surface. This localized texture modification increases friction force and retention capability without requiring high precision across the entire connector assembly, as only the surface pattern geometry needs to meet specific tolerances.
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 crosshatch pattern enhances the retention force between the connector and cable, preventing disconnection under higher pulling forces and ensuring reliable electrical connections.
Implementation Method 1
The crosshatch pattern includes multiple grooves extending parallel to one another and multiple cross-grooves extending parallel to one another. The cross-grooves intersect the grooves to define multiple raised panels along the outer surface.
Data Source
AI summary
An electrical connector includes an outer contact extending along a longitudinal axis between a front end and a rear end. The outer contact has a terminating segment that extends to the rear end and is configured to engage and be surrounded by a conductive layer of a cable to electrically connect the outer contact to the cable. The terminating segment is cylindrical and defines a chamber therethrough that is configured to receive one or more wires of the cable therein. The terminating segment has a crosshatch pattern along an outer surface thereof. The crosshatch pattern includes multiple grooves extending parallel to one another and multiple cross-grooves extending parallel to one another. The cross-grooves intersect the grooves to define multiple raised panels along the outer surface.