Magnetic Jack Assembly Segmentation for Automated Manufacturing

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Solution Overview

Problem

Existing magnetic jacks face manufacturing challenges due to hand-wound transformers, which are prone to damage and performance variations, and have small sizes that make inspection and handling difficult, especially as data rates increase.

Innovation Solution

A magnetic jack assembly with automated manufacturing capabilities, featuring filtering sub-assemblies with separate conductors, recesses for windings, and compliant pins for easier assembly and connection to circuit boards, allowing for improved handling and reduced risk of damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hand-wound transformers with thin wires are used, then magnetic performance can be achieved, but manufacturing complexity increases and reliability decreases due to wire damage risk

Engineering Contradiction:

Improvewire integrityVSAvoidmanual winding process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the transformer into a pre-formed winding assembly that is manufactured separately and then installed as a complete unit in the magnetic jack. This segmentation allows the delicate winding process to be performed under controlled conditions away from the final assembly, reducing handling damage risk while maintaining manufacturing flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transformer windings are prepared in advance as pre-assembled units before being integrated into the final magnetic jack product. This preliminary action enables quality control and inspection to be performed on the windings independently, ensuring wire integrity before the components are combined in the final assembly.

Inventive Principle:

Principle #10Preliminary action

2Volume of moving object

If smaller transformer and choke components are used, then device size is reduced, but inspection difficulty and handling complexity increase

Engineering Contradiction:

Improvetransformer sizeVSAvoidinspection difficulty

Core Design Contradiction:

Volume of moving objectVSDifficulty of detecting and measuring

Solution Approach 1:

The patent incorporates the transformer and choke components into a three-dimensional housing structure with designated cavities and mounting positions. This spatial arrangement allows inspection tools and procedures to access small components from multiple angles, effectively overcoming the inspection difficulties associated with miniaturized components.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent introduces intermediary structural elements such as housing cavities, mounting brackets, and positioning features that facilitate the inspection and handling of small transformer and choke components. These intermediaries provide accessible interfaces for quality control procedures without requiring direct manipulation of the tiny components themselves.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If automated assembly is implemented, then productivity increases, but manufacturing precision requirements increase

Engineering Contradiction:

Improveassembly speedVSAvoidalignment precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent incorporates localized precision features such as molded-in positioning pins, tapered mounting surfaces, and interference-fit interfaces at critical assembly points. These local precision elements guide automated assembly equipment and ensure accurate component alignment without requiring high precision across the entire manufacturing process.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The housing and component designs include self-aligning features such as snap-fit mechanisms, elastic retention elements, and geometric interlocking structures that automatically position components correctly during automated assembly. These self-service features reduce the precision demands on automated equipment by providing mechanical guidance and tolerance compensation.

Inventive Principle:

Principle #25Self-service

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

Enhances manufacturability and facilitates automated assembly, reducing performance variations and handling issues while maintaining magnetic performance.

Implementation Method 1

The transformer often is toroidal in shape and includes primary and secondary windings coupled together and wrapped around the toroid so as to provide magnetic coupling between the primary and secondary circuits while ensuring electrical isolation

Methodology Applied

Scientific EffectMagnetic coupling: Electromagnetic Induction

Implementation Method 2

Chokes are also commonly used to filter out unwanted noise, such as common-mode noise, and can be toroidal ferrite designs used in differential signaling applications

Methodology Applied

Scientific EffectMagnetic filtering: Magnetism

Data Source

PatentUS8545274B2Filtering assembly and modular jack using same

Publication Date: 2013.10.01 MOLEX INC

AI summary

A magnetic jack assembly includes a housing, circuit boards, shields and various filtering components. Multiple aspects of the assembly enhance manufacturability and facilitate automated manufacturing.