Selective Ferrite Noise Reduction in Connectors

Solution Overview

Problem

Conventional joint connectors provide noise reduction members for all terminals, leading to increased size and cost, despite only some terminals being prone to noise, which is inefficient.

Innovation Solution

A connector design where noise reduction members are only disposed at terminals prone to noise, specifically at branch-line connection terminals, while omitting them from trunk-line connection terminals, using ferrite materials for effective noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If noise reduction members are provided for all terminals, then noise suppression is improved, but connector size and cost increase

Engineering Contradiction:

Improvenoise suppressionVSAvoidconnector size

Core Design Contradiction:

Object-affected harmful factorsVSVolume of stationary object

Solution Approach 1:

The patent applies local quality by providing noise reduction members only at specific terminals (branch-line connection terminals) rather than uniformly at all terminals. This is achieved by selectively positioning ferrite beads or similar noise reduction components based on the terminal's function and noise susceptibility, thereby suppressing noise where needed while avoiding unnecessary additions at trunk-line terminals where noise is less problematic.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements partial action by providing noise reduction members for only some terminals (partially) rather than all terminals (excessively). Specifically, noise reduction members are installed at branch-line connection terminals which are more prone to noise, while omitting them from trunk-line connection terminals, thus achieving adequate noise suppression without the excessive size and cost increase that would result from universal installation.

Inventive Principle:

Principle #16Partial or excessive action

2Object-affected harmful factors

If noise reduction members are provided for all terminals, then noise suppression is improved, but connector cost increases

Engineering Contradiction:

Improvenoise suppressionVSAvoidconnector cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent applies local quality by providing noise reduction members only at specific terminals (branch-line connection terminals) rather than uniformly at all terminals. This is achieved by selectively positioning ferrite beads or similar noise reduction components based on the terminal's function and noise susceptibility, thereby suppressing noise where needed while avoiding unnecessary additions at trunk-line terminals where noise is less problematic.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements partial action by providing noise reduction members for only some terminals (partially) rather than all terminals (excessively). Specifically, noise reduction members are installed at branch-line connection terminals which are more prone to noise, while omitting them from trunk-line connection terminals, thus achieving adequate noise suppression without the excessive size and cost increase that would result from universal installation.

Inventive Principle:

Principle #16Partial or excessive action

3Object-affected harmful factors

If noise reduction members are disposed at multiple terminals, then noise suppression is improved, but signal waveform distortion increases

Engineering Contradiction:

Improvenoise suppressionVSAvoidsignal waveform integrity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent applies local quality by providing noise reduction members only at specific terminals (branch-line connection terminals) rather than uniformly at all terminals. This is achieved by selectively positioning ferrite beads or similar noise reduction components based on the terminal's function and noise susceptibility, thereby suppressing noise where needed while avoiding unnecessary additions at trunk-line terminals where noise is less problematic.

Inventive Principle:

Principle #3Local quality

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

This approach reduces size and cost by targeting noise reduction only where necessary, maintaining signal integrity by minimizing distortion in signal waveforms and reducing unnecessary noise reduction member locations in the circuit route.

Implementation Method 1

the noise reduction member is made of a material containing ferrite

Methodology Applied

Scientific EffectMagnetic loss: Magnetic Hysteresis

Implementation Method 2

a noise reduction member which is held in the housing so as to reduce noise occurring in the terminals

Methodology Applied

Scientific EffectEddy current damping: Eddy Current Damping

Data Source

PatentUS10630027B2Connector with selective placement of noise reduction member

Publication Date: 2020.04.21 YAZAKI CORP

AI summary

A connector is equipped with a housing capable of being fitted in a mating housing of a mating connector, a plurality of terminals which are held by the housing and electrically connected to each other, and a noise reduction member which is held in the housing so as to reduce noise occurring in the terminals. The noise reduction member is disposed at at least one of the plurality of terminals, and is not disposed at at least one of the remaining terminals of the plurality of terminals. The noise reduction member is made of a material containing ferrite.