WO2019198526A1 - Dispositif d'absorption de bruit - Google Patents

Dispositif d'absorption de bruit Download PDF

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Publication number
WO2019198526A1
WO2019198526A1 PCT/JP2019/013567 JP2019013567W WO2019198526A1 WO 2019198526 A1 WO2019198526 A1 WO 2019198526A1 JP 2019013567 W JP2019013567 W JP 2019013567W WO 2019198526 A1 WO2019198526 A1 WO 2019198526A1
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WO
WIPO (PCT)
Prior art keywords
ferrite
cable
pair
rod
bobbin
Prior art date
Application number
PCT/JP2019/013567
Other languages
English (en)
Japanese (ja)
Inventor
佳吾 高橋
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2019198526A1 publication Critical patent/WO2019198526A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to a noise absorber, and more particularly, to a noise absorber that reduces high-frequency noise emitted from a cable by using a ferrite core.
  • the technology disclosed in the present specification has been completed based on the above-described circumstances, and provides a noise absorbing device that can simplify the work of turning a cable to a ferrite core a plurality of times.
  • the noise absorbing device disclosed in this specification includes a rod-shaped ferrite core portion in which a cable can be directly or indirectly wound in a spiral shape, and an outer peripheral ferrite portion that covers the outer periphery of the ferrite core portion.
  • the rod-shaped ferrite core portion on which the cable can be spirally wound directly or indirectly is provided. Therefore, in order to turn the cable around the ferrite core part a plurality of times, it is sufficient to simply wind the cable directly or indirectly around the rod-like ferrite core part in a spiral shape. Therefore, the operation
  • a cable winding portion around which a cable is wound a bobbin portion having a through hole formed inside the cable winding portion, and a pair of ferrite portions covering the bobbin portion.
  • the pair of ferrite portions corresponds to the ferrite core portion around which the cable is indirectly wound, corresponds to the rod-shaped portion inserted into the through hole, and the outer peripheral ferrite portion, and is integrally formed with the rod-shaped portion.
  • an outer cylinder part covering the bobbin part covering the bobbin part.
  • the bobbin portion for indirectly winding the cable around the ferrite core portion is provided. That is, the cable can be wound around the bobbin portion in advance. This facilitates the work of turning the cable a plurality of times around the ferrite core part, and also enables the winding to be automated. Further, it is possible to prevent problems due to breakage such as bending, chipping, cracking, and scratching of the ferrite core portion due to cable winding work.
  • the noise emitted from the cable is more reduced by the ferrite portion than when the rod-shaped portion and the outer tube portion are not integrally formed. Can be absorbed.
  • each of the pair of ferrite parts includes a slit formed in the outer cylinder part along the axial direction of the outer cylinder part and having a slit width larger than the diameter of the cable. Also good.
  • the pair of ferrite cores can be attached to the bobbin portion around which the cable is wound while the both ends of the cable are pulled out by the slit. At that time, the biting of the cable by the pair of ferrite cores can also be suppressed.
  • the noise absorber further includes a pair of cylindrical synthetic resin cases covering the pair of ferrite portions, and the pair of synthetic resin cases respectively press the pair of ferrite portions in the axial direction. You may make it include a spring part.
  • the paired ferrite portions can be protected by the synthetic resin case. Further, each ferrite portion is also pressed in the axial direction by the spring portion of the resin case. Thereby, the contact between the pair of ferrite portions can be ensured and the contact pressure can be adjusted.
  • the disassembled perspective view which shows the noise absorber of one Embodiment Perspective view showing noise absorber Sectional view along line AA in FIG.
  • the noise absorbing device 10 is used for a cable 50 of a vehicle wire harness, for example.
  • the noise absorbing device 10 includes a bobbin portion 20, a pair of ferrite portions 30, and a pair of synthetic resin cases (40A, 40B). In addition, when not distinguishing a pair of synthetic resin cases (40A, 40B), they are referred to as a synthetic resin case 40.
  • the bobbin portion 20 includes a cable winding portion 21 around which the cable 50 is wound, a through hole 22 (see FIG. 4) formed in the cable winding portion 21, and a cable winding portion. It includes flanges 23 formed at both ends of the attaching portion 21.
  • the pair of ferrite portions 30 are composed of the ferrite portions 30 having the same configuration, and cover the bobbin portion 20 by being united in the axial direction (the direction of arrow X in FIG. 1) when attached to the bobbin portion 20.
  • Each ferrite part 30 includes a rod-like part 31 and an outer cylinder part 32 as shown in FIG.
  • the rod-like portion 31 has a rod-like shape with a circular cross section, and is inserted into the through hole 22 of the bobbin portion 20 when the ferrite portion 30 is attached to the bobbin portion 20.
  • the rod-shaped part 31 is an example of a ferrite core part around which the cable 50 is indirectly wound. Note that the ferrite core portion is not limited to the rod-shaped portion 31.
  • the outer cylinder part 32 is integrally formed with the rod-like part 31 and covers the bobbin part 20.
  • the outer cylinder part 32 is an example of the outer periphery ferrite part which covers the outer periphery of a ferrite core part.
  • the outer cylinder part 32 does not need to be integrally formed with the rod-shaped part 31.
  • the outer peripheral ferrite portion is not limited to the outer cylindrical portion 32.
  • the outer cylinder portion 32 is formed along the axial direction (the arrow X direction in FIG. 1) and includes a slit 33 having a slit width larger than the diameter of the cable 50.
  • Each ferrite part 30 can be attached to the bobbin part 20 around which the cable 50 is wound while the cable 50 is pulled out by the slit 33. At that time, 50 biting of the cable by the ferrite portion 30 is also suppressed.
  • a locking opening 34 for locking a locking portion 43 of a synthetic resin case 40 described later is formed in the outer cylindrical portion 32 of the ferrite portion 30.
  • Each of the pair of synthetic resin cases (40A, 40B) has a cylindrical shape similar to that of the ferrite portion 30, and is joined in the axial direction (the direction indicated by the arrow X in FIG. 1) to thereby pair the ferrite portion 30. Cover.
  • Each synthetic resin case (40A, 40B) includes a spring portion 44 that presses the ferrite portion 30 in the axial direction (the arrow X direction in FIG. 1) (see FIG. 3).
  • the pair of ferrite portions 30 can be protected by the pair of synthetic resin cases (40A, 40B).
  • each ferrite part 30 is also pressed by the spring part 44 in the axial direction (arrow X direction of FIG. 1). Thereby, the contact between the pair of ferrite portions 30 can be secured and the contact pressure can be adjusted.
  • the spring portion 44 is formed integrally with the synthetic resin case 40, for example.
  • the spring portion 44 may be formed of a separate member from the synthetic resin case 40.
  • each synthetic resin case (40A, 40B) is formed with a locking portion 43 that is locked to the locking opening 34 of the outer cylindrical portion 32 of the ferrite portion 30.
  • each synthetic resin case 40 is formed with a connecting piece 42A and a connecting opening 42B, and each connecting piece 42A is connected to each pair of connecting openings 42B to join (unify) a pair of synthetic resin cases (40A, 40B). Is done by combining with
  • each synthetic resin case (40A, 40B) similarly to the ferrite portion 30, the ferrite portion 30 is pulled out while the cable 50 is pulled out along the axial direction (the arrow X direction in FIG. 1). A slit 41 for covering is formed (see FIG. 2).
  • the cable 50 is wound around the cable winding portion 21 of the bobbin portion 20 as shown in FIG.
  • the predetermined number of turns is, for example, the cable 50 such as the frequency of the signal applied to the cable 50, the frequency of noise generated in the cable 50, the allowable signal attenuation, and the required noise absorption. Depending on the use conditions, it is determined by experiments or the like as appropriate.
  • the pair of ferrite portions 30 are attached to the bobbin portion 20 around which the cable 50 is wound.
  • a pair of synthetic resin cases (40 ⁇ / b> A, 40 ⁇ / b> B) are attached to the pair of ferrite portions 30 attached to the bobbin portion 20.
  • the coupling piece 42A and the coupling opening 42B provided in each synthetic resin case 40 are coupled to each other, whereby the noise absorbing device 10 with the cable 50 as shown in FIG. 2 is assembled.
  • the noise absorbing device 10 of this embodiment includes a rod-shaped portion (ferrite core portion) 31 on which the cable 50 can be indirectly wound in a spiral shape via the cable winding portion 21 of the bobbin portion 20. Is provided. Therefore, in order to turn the cable 50 around the rod-shaped portion 31 a plurality of times, it is sufficient to simply wind the cable 50 indirectly around the cable winding portion 21 of the bobbin portion 20 in a spiral manner. Therefore, the operation
  • the rod-shaped portion 31 is covered with the outer tube portion (outer peripheral ferrite portion) 32, noise emitted from the cable 50 can be more absorbed by the outer tube portion 32.
  • the bobbin portion 20 for indirectly winding the cable 50 around the rod-shaped portion (ferrite core portion) 31 is provided.
  • the cable 50 can be wound around the bobbin portion 20 in advance. Therefore, the work of turning the cable 50 around the rod-shaped portion 31 a plurality of times is facilitated, and the winding work can be automated. In addition, it is possible to prevent problems due to breakage, chipping, cracking, damage, etc. of the rod-shaped part (ferrite core part) 31 due to the cable winding work.
  • the rod-shaped part 31 and the outer cylinder part 32 of the ferrite part 30 are integrally formed. Therefore, compared with the case where the rod-shaped part 31 and the outer cylinder part 32 are not integrally formed, the noise emitted from the cable 50 can be more absorbed by the ferrite part 30.
  • the winding radius of the cable 50 can be significantly smaller than the winding radius in the case of the conventional clamp core. Thereby, the difference in cable length due to the difference in the number of turns can be reduced as compared with the case of the clamp core. This contributes to the uniformity of the product length when the noise absorbing device 10 is attached to the cable 50 when the cable length is constant.
  • the bobbin portion 20 is provided and the cable 50 is wound around the cable winding portion 21 of the bobbin portion 20, that is, the cable 50 is indirectly spirally formed on the rod-shaped portion (ferrite core portion) 31.
  • the cable 50 may be directly wound around the rod-shaped ferrite core portion in a spiral shape and may include an outer peripheral ferrite portion that covers the outer periphery of the ferrite core portion.
  • the ferrite core portion is not limited to the pair of individual rod-shaped portions 31, and the outer peripheral ferrite portion is not limited to the pair of individual outer cylinder portions 32.
  • the example in which the slit 33 formed along the axial direction is provided in the outer tube portion 32 of the ferrite portion 30 is not necessarily limited thereto.
  • a drawer hole may be provided instead of the slit 33.
  • the rod-shaped portion 31 of the ferrite portion 30 has an example of a rod-shaped cross section, but the present invention is not limited thereto.
  • the rod-shaped portion 31 may have a rod-like cross section or a hexagonal cross section.
  • the cross-sections of the cable winding portion 21, the outer cylinder portion 32, and the synthetic resin case 40 may also have a rectangular or hexagonal shape. That is, the cylindrical shape of the cable winding part 21, the outer cylinder part 32, and the synthetic resin case 40 is not limited to a cylindrical shape having a circular cross section.
  • Noise absorber 20 Bobbin portion 21: Cable winding portion 22: Through hole 30: Ferrite portion (a pair of ferrite portions) 31: Rod-shaped part (ferrite core part) 32: Outer tube (outer periphery ferrite) 33: Slit 40A: Synthetic resin case (one of a pair of synthetic resin cases) 40B: Synthetic resin case (the other of the pair of synthetic resin cases) 44: Spring part 50: Cable

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un dispositif d'absorption de bruit 10 comprenant : une partie en forme de tige 31 ayant une forme de tige sur laquelle un câble 50 est enroulé directement ou indirectement ; et des parties cylindriques externes 32 qui recouvrent la périphérie externe de la partie en forme de tige 31. Le dispositif d'absorption de bruit comprend : une partie de bobine ayant une section enroulée par câble 21 sur laquelle le câble est enroulé, et un trou traversant 22 formé à l'intérieur de la section enroulée de câble ; et une paire de parties en ferrite 30 qui recouvrent la partie de bobine 20. La paire de parties en ferrite comprend respectivement : la partie en forme de tige 31 sur laquelle le câble 50 est enroulé indirectement et qui est insérée dans le trou traversant 22 ; et les parties cylindriques externes 32 qui sont formées d'un seul tenant avec la partie en forme de tige 31 et recouvrent la partie de bobine 20.
PCT/JP2019/013567 2018-04-13 2019-03-28 Dispositif d'absorption de bruit WO2019198526A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-077496 2018-04-13
JP2018077496A JP2019186453A (ja) 2018-04-13 2018-04-13 ノイズ吸収装置

Publications (1)

Publication Number Publication Date
WO2019198526A1 true WO2019198526A1 (fr) 2019-10-17

Family

ID=68163668

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/013567 WO2019198526A1 (fr) 2018-04-13 2019-03-28 Dispositif d'absorption de bruit

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JP (1) JP2019186453A (fr)
WO (1) WO2019198526A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125707U (ja) * 1984-02-03 1985-08-24 株式会社トーキン インダクタ収納用ケ−スの構造
JPH1041139A (ja) * 1996-07-19 1998-02-13 Murata Mfg Co Ltd ノイズ吸収装置
JP2008251632A (ja) * 2007-03-29 2008-10-16 Tdk Corp ノイズ吸収装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125707U (ja) * 1984-02-03 1985-08-24 株式会社トーキン インダクタ収納用ケ−スの構造
JPH1041139A (ja) * 1996-07-19 1998-02-13 Murata Mfg Co Ltd ノイズ吸収装置
JP2008251632A (ja) * 2007-03-29 2008-10-16 Tdk Corp ノイズ吸収装置

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JP2019186453A (ja) 2019-10-24

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