Wire-Wound Noise Reduction Element for Any Cable Length

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Solution Overview

Problem

Conventional noise absorption elements cannot be applied to conductive wires of varying lengths due to their structural limitations, requiring the wire to be longer than the insertion hole.

Innovation Solution

A noise reduction element featuring a protruded portion to hook the bent end of a conductive wire and a winder portion where parallel conductive wire portions are wound, allowing for any length of wire to be used without a magnetic body cover.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a conventional noise absorption element with an insertion hole structure is used, then the magnetic molded body can absorb noises effectively, but the element cannot be applied unless the conductive wire is longer than the insertion hole

Engineering Contradiction:
Improvenoise absorptionVSAvoidapplicability to different wire lengths
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The conductive wire is divided into multiple segments: a bent portion hooked on the protruded portion, and first and second conductive wire portions extending in opposite directions. These segments are wound around the winder portion in parallel, creating a compact structure that eliminates the need for a long wire and insertion hole while maintaining noise absorption functionality through the magnetic molded body.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention transitions from a linear insertion hole structure to a three-dimensional winding configuration around a winder portion. By winding the conductive wire portions in parallel around the winder, the structure achieves compactness in one dimension while maintaining the necessary length for noise absorption in other dimensions, enabling applicability to wires of any length.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the conductive wire is wound around the winder portion in parallel, then the structure becomes compact and applicable to any wire length, but the magnetic flux and inductance must be carefully managed

Engineering Contradiction:
Improveapplicability to any wire lengthVSAvoidmagnetic flux management
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The parallel winding of the first and second conductive wire portions around the winder portion creates opposing magnetic fluxes that cancel each other out. This converts the potentially harmful inductance and magnetic flux into a beneficial neutralization effect, reducing connection impedance while maintaining the compact structure applicable to wires of any length.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Stability of the object's composition

If the bent portion is hooked on the protruded portion, then the wire positioning is secured, but the structure must accommodate the hooking mechanism

Engineering Contradiction:
Improvewire positioning stabilityVSAvoidstructure complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The protruded portion is integrated as part of the magnetic molded body rather than being a separate component. This merging of the positioning mechanism into the main body simplifies the overall structure while maintaining stable wire positioning through the hooking of the bent portion on the protruded portion.

Inventive Principle:
Principle #5Merging (Combining)

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

Enables effective noise reduction for conductive wires of any length and thickness by canceling out magnetic flux and inductance, thereby suppressing connection impedance and maintaining shielding performance.

Implementation Method 1

both a first conductive wire portion which extends in one direction from the bent portion of the conductive wire hooked on the protruded portion and a second conductive wire portion which extends in another direction from the bent portion of the conductive wire hooked on the protruded portion are wound in a state where the first and second conductive wire portions are parallel to each other

Methodology Applied
Scientific EffectMagnetic flux cancellation: Electromagnetic Induction

Data Source

PatentUS11875923B2Noise reduction element
Publication Date: 2024.01.16 MITSUBISHI ELECTRIC CORP
  • US11875923B2 patent drawing
  • US11875923B2 patent drawing
  • US11875923B2 patent drawing

AI summary

A noise reduction element includes a protruded portion on which a bent portion of a conductive wire is hooked, and a winder portion around which both a first conductive wire portion extending in one direction from the bent portion of the conductive wire hooked on the protruded portion and a second conductive wire portion extending in another direction from the bent portion of the conductive wire hooked on the protruded portion are wound in a state where the first and second conductive wire portions are parallel to each other.