# US 2022/0044843 A1 · Noise reduction element

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- Number: US 2022/0044843 A1
- Document ID: US20220044843A1
- Status: Published application
- Kind: A1
- Application number: 17/505,725
- Filed: 2021-10-20
- Published: 2022-02-10
- Earliest claimed: 2019-05-24
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Ayumi SAKAI; Yosuke WATANABE; Yuichi SASAKI
- Web page: https://patentgrep.com/patent/US20220044843A1

## CPC

- H01B 7/30: with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
- H05K 9/0098: {for shielding electrical cables}
- H01B 11/1834: {Construction of the insulation between the conductors}
- H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core}
- H01F 17/06: with core substantially closed in itself, e.g. toroid
- H05K 9/00: Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00)
- H01F 2017/065: {Core mounted around conductor to absorb noise, e.g. EMI filter}
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

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.

## Claims

### Claim 1

A noise reduction element comprising:
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 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.

### Claim 2 (depends on 1)

The noise reduction element according to claim 1, wherein
a shape of the winder portion is a cylinder,
the protruded portion is formed on a side surface of the cylinder, and
the first conductive wire portion and the second conductive wire portion are wound around the side surface of the cylinder in a state where the first and second conductive wire portions are parallel to each other.

### Claim 3 (depends on 2)

The noise reduction element according to claim 2, wherein on two bottom surfaces of the cylinder, respective flanges are formed.

### Claim 4 (depends on 1)

The noise reduction element according to claim 1, wherein
the winder portion includes a first cylindrical portion including one of bottom surfaces of the winder portion, a second cylindrical portion including another one of the bottom surfaces, and a third cylindrical portion located between the first cylindrical portion and the second cylindrical portion, the first, second, and third cylindrical portions having an identical axis,
the protruded portion is formed on a side surface of the first cylindrical portion,
circumference of the first cylindrical portion and circumference of the second cylindrical portion are equal,
circumference of the third cylindrical portion is shorter than the circumference of the first cylindrical portion and the circumference of the second cylindrical portion, and
the first conductive wire portion and the second conductive wire portion are wound around a side surface of the third cylindrical portion in a state where the first and second conductive wire portions are parallel to each other.

### Claim 5 (depends on 1)

The noise reduction element according to claim 1, wherein
a shape of the winder portion is a rectangular parallelepiped,
the protruded portion is formed on any one of six surfaces of the rectangular parallelepiped, and
the first conductive wire portion and the second conductive wire portion are wound around a perimeter of the rectangular parallelepiped in a state where the first and second conductive wire portions are parallel to each other.

### Claim 6 (depends on 1)

The noise reduction element according to claim 1, wherein the conductive wire is a pigtail for connecting an outer conductor of a shielded cable and a housing of electronic equipment.

### Claim 7 (depends on 1)

The noise reduction element according to claim 1, wherein the winder portion is a magnetic body.