JPH10335147A - Unwanted radiation prevention filter - Google Patents

Unwanted radiation prevention filter

Info

Publication number
JPH10335147A
JPH10335147A JP15795097A JP15795097A JPH10335147A JP H10335147 A JPH10335147 A JP H10335147A JP 15795097 A JP15795097 A JP 15795097A JP 15795097 A JP15795097 A JP 15795097A JP H10335147 A JPH10335147 A JP H10335147A
Authority
JP
Japan
Prior art keywords
cable
ferrite core
pair
core
ferrite
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP15795097A
Other languages
Japanese (ja)
Inventor
Yutaka Shirae
豊 白栄
Original Assignee
Nintendo Co Ltd
任天堂株式会社
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 Nintendo Co Ltd, 任天堂株式会社 filed Critical Nintendo Co Ltd
Priority to JP15795097A priority Critical patent/JPH10335147A/en
Publication of JPH10335147A publication Critical patent/JPH10335147A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To significantly improve the efficiency of absorption of unwanted radiation, by winding a cable so as to penetrate a ferrite core, then housing a portion of the cable along a circumferential surface of the ferrite core into a cable housing portion, and passing one portion and the other portion of the cable into through-holes. SOLUTION: A cable 40 is wound on a ferrite core 30 for 1.5 times (one and a half turns), and a half-turn portion 40a exposed along the axial direction on a circumferential surface of the ferrite core 30 is housed in a case 20 in such a state that the portion 40a is substantially abutted against an outer circumferential surface of the ferrite core 30. Then, the cable 40 is led out from both through-holes 24, 24 of the case 20. Inside of halves 21a, 21b of the case 20, housing portions 26a, 26b for housing cores 30a, 30b obtained by bisecting the ferrite core 30 are formed, and holding portions 27a, 27b are formed to surround the housing portions 26a, 26b, respectively.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】この発明は不要輻射防止フィルタ
に関し、特に電子機器と周辺機器の間又は電子機器の間
を接続するケーブルやコードから輻射し又は漏洩する電
磁波の不要輻射を有効に減衰させるために使用される不
要輻射防止フィルタに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unnecessary radiation preventing filter, and more particularly to an effective filter for effectively attenuating unnecessary radiation of electromagnetic waves radiated or leaked from a cable or a cord connecting between electronic equipment and peripheral equipment or between electronic equipment. Radiation filter used for the following.
【0002】[0002]
【従来の技術】コンピュータ等の電子機器本体を発生源
とする電磁波は、電子機器とキーボード等の周辺機器と
の間、又はコンピュータとプリンタ等の複数の電子機器
の間を接続するケーブルをアンテナとして輻射し又は漏
洩し、他の電子機器の誤動作を招く等の問題を生じてい
る。従来、電磁波の不要輻射を防止する技術としては、
実公昭62−14770号に開示されるように、フェラ
イトコアにケーブルを貫通させるものが知られている。
2. Description of the Related Art Electromagnetic waves generated from the main body of an electronic device such as a computer are used as an antenna with a cable connecting between the electronic device and peripheral devices such as a keyboard or between a computer and a plurality of electronic devices such as a printer. Radiation or leakage causes problems such as malfunction of other electronic devices. Conventionally, as technology to prevent unnecessary radiation of electromagnetic waves,
As disclosed in Japanese Utility Model Publication No. 62-14770, a cable in which a cable passes through a ferrite core is known.
【0003】実公昭62−14770号に開示されたノ
イズ吸収装置は、図6の断面図に示すように、既存のケ
ーブルにも容易に装着可能にするために、フェライトコ
アを2分割し、ケーブルをフェライトコアの間に挟み込
むことによって貫通させ、フェライトコアを覆うケース
(カバー)に形成された掛止部を互いに係合させること
により、フェライトコア及びケーブルを固定的に保持し
ていた。
The noise absorbing device disclosed in Japanese Utility Model Publication No. Sho 62-14770 has a ferrite core divided into two parts, as shown in a cross-sectional view of FIG. The ferrite core and the cable are fixedly held by sandwiching the ferrite core between the ferrite cores and engaging the hooks formed on a case (cover) covering the ferrite core with each other.
【0004】[0004]
【発明が解決しようする課題】実公昭62−14770
号の技術は、ケーブルがフェライトコアの間を1回貫通
するだけであるので、電磁波の不要輻射を低減できるも
のの、不要輻射の漏洩を制限する法規制の厳しい国又は
地域では十分とは言えなかった。
Problems to be Solved by the Invention
Although the technology of No. 1 can reduce unnecessary radiation of electromagnetic waves because the cable only passes once between ferrite cores, it cannot be said that it is sufficient in countries or regions where laws and regulations that restrict the leakage of unnecessary radiation are severe. Was.
【0005】そのため、不要輻射の法規制の厳しい国又
は地域向には、不要輻射を一層低減するために、実公昭
62−14770号のその他の実施例として開示された
ような、1本のケーブルをジグザグに挿通する技術が採
用されている。しかし、ケーブルをジグザグに挿通する
際に手間がかかり、組立工程が複雑となり、量産に適さ
ず、しかもフェライトコアの構造が複雑かつ高価となる
問題が生じる。
[0005] Therefore, for countries or regions where laws and regulations on unnecessary radiation are strictly regulated, one cable as disclosed in another embodiment of Japanese Utility Model Publication No. 62-14770 is disclosed in order to further reduce unnecessary radiation. The technique of inserting a zigzag through is adopted. However, it takes time and effort to insert the cable in a zigzag manner, which complicates the assembly process, is not suitable for mass production, and has a problem that the structure of the ferrite core is complicated and expensive.
【0006】上記問題を解消するために、実公昭62−
14770号に開示されたノイズ吸収装置と同型のもの
であって、図7に示す断面形状のように、ケーブルの直
径のほぼ2倍の内径を有する円筒状のフェライトコアを
用いて、図7に示すようにケーブルを巻き付けることが
考えられる。すなわち、ケーブルをフェライトコアに貫
通させて軸方向(図示の横方向)の一方端から外部に露
出させ、ケースの軸方向の周面に沿って他方端部からさ
らにフェライトコアに貫通させて、一方端部から引き出
す。このようにすれば、図6の1回貫通させた場合より
も、1ターン多くケーブルをフェライトコアに巻き付て
いるので、フェライトコアとケーブルの接触面積を増や
し、ノイズ吸収効率を向上できる。
In order to solve the above problem, Japanese Utility Model Publication No.
FIG. 7 shows a cross-sectional shape shown in FIG. 7 of the same type as the noise absorbing device disclosed in Japanese Patent No. 14770, and using a cylindrical ferrite core having an inner diameter almost twice the diameter of the cable. It is conceivable to wind the cable as shown. That is, the cable is penetrated through the ferrite core to be exposed outside from one end in the axial direction (lateral direction in the drawing), and further penetrated through the ferrite core from the other end along the axial peripheral surface of the case. Pull out from the end. By doing so, the cable is wound around the ferrite core one more turn than the case where the cable is pierced once in FIG. 6, so that the contact area between the ferrite core and the cable can be increased and the noise absorption efficiency can be improved.
【0007】しかし、図7に示す技術は、フェライトコ
アに巻き付けたケーブルの一部がケースの外部に露出
し、ケーブルの露出部分がフェライトコアの周面と少し
離れているので、ケーブルとフェライトコアの間に隙間
が生じ、不要輻射の吸収効率が低下するという問題点が
ある。また、フェライトコアに巻き付けたケーブルの一
部がケースの外部に露出するため、見た目が悪いだけで
なく、露出部分が傷付き易く、露出部分が緩み別のもの
に引っかけてしまう心配もある。
However, in the technique shown in FIG. 7, a part of the cable wound around the ferrite core is exposed to the outside of the case, and the exposed part of the cable is slightly separated from the peripheral surface of the ferrite core. There is a problem that a gap is generated between the two and the efficiency of absorbing unnecessary radiation is reduced. In addition, since a part of the cable wound around the ferrite core is exposed to the outside of the case, the appearance is not only bad, but also the exposed portion is easily damaged, and the exposed portion may be loose and may be caught by another.
【0008】それゆえに、この発明の目的は、電子機器
と周辺機器又は複数の電子機器間を接続するケーブルか
ら輻射する不要な電磁波を効果的に軽減でき、不要輻射
の吸収効率を格段に向上し、見た目もよく、ケーブルの
緩みを生じ難い、不要輻射防止フィルタを提供すること
である。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to effectively reduce unnecessary electromagnetic waves radiated from a cable connecting an electronic device and a peripheral device or a plurality of electronic devices, thereby significantly improving the efficiency of absorbing unnecessary radiation. Another object of the present invention is to provide an unnecessary radiation preventing filter which has a good appearance and is unlikely to loosen a cable.
【0009】[0009]
【課題を解決するための手段】上記課題を解決するため
に、本願発明は、一対の半円筒形状のフェライトコア
と、絶縁性材料から成り、前記一対のフェライトコアを
収納するコア収納部を有し、一対のフェライトコアの軸
方向の両端部の近傍に前記ケーブルを通す貫通孔をそれ
ぞれ形成し、一対のものを組み合わせることによって筒
状形状となるケースと、前記一対のケースの前記フェラ
イトコアの軸方向に沿う一辺で互いに回動自在に接続す
る接続部を備える。
In order to solve the above-mentioned problems, the present invention comprises a pair of semi-cylindrical ferrite cores and a core accommodating portion made of an insulating material for accommodating the pair of ferrite cores. Then, a through-hole for passing the cable is formed in the vicinity of both ends of the pair of ferrite cores in the axial direction, and a cylindrical case is formed by combining the pair of ferrite cores, and a ferrite core of the pair of cases is formed. A connection portion is provided that is rotatably connected to each other at one side along the axial direction.
【0010】前記一対のケースは、さらに、互いに回動
して係合させたときに、前記一対のケースを筒状に保持
する係合部と、前記一対のフェライトコアを前記一対の
ケースのそれぞれのコア収納部に収納した状態で固定的
に保持する保持部と、前記一対のフェライトコアの周辺
面と前記係合部との間に、前記ケーブルを収納するケー
ブル収納部とを形成してなり、前記ケーブルが前記フェ
ライトコアを貫通するように軸方向に沿って巻き付けら
れ、フェライトコアの周面に沿うケーブルの部分が前記
ケーブル収納部に収納され、ケーブルの一方部分と他方
部分が前記貫通孔にそれぞれ通されたことを特徴とす
る。
[0010] The pair of cases further include an engaging portion for holding the pair of cases in a cylindrical shape when the pair of cases are rotated and engaged with each other, and a pair of the ferrite cores each of the pair of cases. A holding portion fixedly held in a state of being stored in the core storage portion, and a cable storage portion for storing the cable between a peripheral surface of the pair of ferrite cores and the engagement portion. The cable is wound in the axial direction so as to penetrate the ferrite core, a portion of the cable along a peripheral surface of the ferrite core is stored in the cable storage portion, and one part and the other part of the cable are formed in the through hole. , Respectively.
【0011】[0011]
【作用】ケーブルはフェライトコアに巻き付けられ、そ
れによって単にフェライトコア内部にケーブルを貫通さ
せた場合に比べて、フェライトコアとケーブルとの接触
面積が増加する。また、ケースに形成された係合部材に
よってフェライトコア同志が密着され、それに伴いフェ
ライトコア内部を挿通されたケーブルとフェライトコア
も密着される。さらに、フェライトコアの周面に沿うケ
ーブルの部分もケース内部に形成されたケーブル収納部
に収納されそれによって、フェライトコアに密着されて
いるので、フェライトコアに巻き付けられたケーブルの
ほとんどの部分においてノイズを効率的に吸収すること
が出来る。
The cable is wound around the ferrite core, thereby increasing the contact area between the ferrite core and the cable as compared with a case where the cable is simply penetrated inside the ferrite core. Further, the ferrite cores are brought into close contact with each other by the engaging member formed in the case, and accordingly, the cable inserted through the inside of the ferrite core and the ferrite core are also brought into close contact. In addition, the part of the cable along the periphery of the ferrite core is also housed in the cable housing formed inside the case, so that it is in close contact with the ferrite core, so most parts of the cable wound around the ferrite core have noise. Can be efficiently absorbed.
【0012】[0012]
【実施例】図1ないし図4はこの発明の一実施例の不要
輻射防止フィルタ(以下、単にフィルタという)であ
り、特に図1はフィルタの平面図、図2はその側面図、
図3はその横断面図(図2における線III−IIIに
沿う断面図)、図4はその縦断面図(図1におけるIV
−IVに沿う断面図)である。
1 to 4 show an unnecessary radiation preventing filter (hereinafter simply referred to as a filter) according to an embodiment of the present invention. In particular, FIG. 1 is a plan view of the filter, FIG.
3 is a cross-sectional view thereof (a cross-sectional view along line III-III in FIG. 2), and FIG.
FIG. 4 is a cross-sectional view taken along line −IV).
【0013】図1〜図4を参照して、フィルタ10の構
成を説明する。フイルタ10は、絶縁性材料で形成され
るケース20と、ケース20内に収納されかつ固定的に
保持されるフェライトコア30と、ケース20から露出
しない状態でフェライトコア30に巻き付けられて収納
されるケーブル40とから構成される。すなわち、ケー
ブル40は、フェライトコア30の中空部を2回通さ
れ、フエライトコア30の周面に沿う部分40aがケー
ス20の内部に収納されて、ケース20の両貫通孔2
4,24から引き出される。結果的には、ケーブル40
がフェライトコア30に対して1.5回(一周半)巻き
付けられた状態とされ、フェライトコア30の周面の軸
方向に沿って露出する半周部分40aがフェライトコア
30の外周面にほぼ当接した状態でケース20に収納さ
れる。そのため、ケーブル40は、フェライトコア30
に対して巻き付けられた略全ての部分において、フェア
イトコア30との密着が図られており、ケーブル40と
フェライトコア30との間に隙間が介在しないように配
置され収納されている。
The structure of the filter 10 will be described with reference to FIGS. The filter 10 is housed in a case 20 formed of an insulating material, a ferrite core 30 housed and fixedly held in the case 20, and wound around the ferrite core 30 without being exposed from the case 20. And a cable 40. That is, the cable 40 is passed through the hollow portion of the ferrite core 30 twice, and the portion 40 a along the peripheral surface of the ferrite core 30 is housed inside the case 20.
Withdrawn from 4,24. As a result, the cable 40
Is wound 1.5 times (one and a half turns) around the ferrite core 30, and the half-peripheral portion 40 a exposed along the axial direction of the peripheral surface of the ferrite core 30 is substantially in contact with the outer peripheral surface of the ferrite core 30. Then, it is stored in the case 20. Therefore, the cable 40 is
In almost all portions wound around the cable 40, close contact with the fairite core 30 is achieved, and the cable is arranged and accommodated so that no gap is interposed between the cable 40 and the ferrite core 30.
【0014】図5はフィルタ10に用いられる部品の詳
細図であり、一対のケース及びフェライトコアを開いた
状態(図2の線III−IIIに沿って展開した横断面
図であって、ケーブルを巻き付ける前の状態)を示す。
次に、図1〜図5を参照して、この実施例のフィルタ1
0の構成を具体的に説明する。
FIG. 5 is a detailed view of components used in the filter 10, showing a state in which a pair of cases and a ferrite core are opened (a cross-sectional view developed along a line III-III in FIG. 2). Before winding).
Next, referring to FIGS. 1 to 5, the filter 1 of this embodiment will be described.
The configuration of 0 will be specifically described.
【0015】ケース20は、一方ハーフ21aと他方ハ
ーフ21bに2分割される。ハーフ21aとハーフ21
bは、フェライトコア30の軸方向に沿う一辺で接続部
25,25により互いにヒンジ接続されて、回動自在に
構成される。ケース20のハーフ21a,21bの内部
には、円筒状のフェライトコア30を2分割したコア3
0a,30bをそれぞれ収納する収納部26a,26b
が形成され、各収納部26a,26bを囲むように保持
部27a,27bが形成される。フェライトコア30の
軸方向に沿う各ハーフ21a,21bの両端部には、組
立て状態においてケーブル40の直径に略等しい径の貫
通孔24(図2参照)を構成する半円状の切欠部24
a,24bが形成される。
The case 20 is divided into one half 21a and the other half 21b. Half 21a and Half 21
“b” is hinged to each other by connecting portions 25 at one side along the axial direction of the ferrite core 30, and is configured to be rotatable. Inside the halves 21 a and 21 b of the case 20, a core 3 is formed by dividing a cylindrical ferrite core 30 into two parts.
Storage portions 26a and 26b for storing 0a and 30b, respectively.
Are formed, and holding portions 27a and 27b are formed so as to surround the storage portions 26a and 26b. At both ends of each of the halves 21 a and 21 b along the axial direction of the ferrite core 30, a semi-circular cutout 24 forming a through hole 24 (see FIG. 2) having a diameter substantially equal to the diameter of the cable 40 in an assembled state.
a, 24b are formed.
【0016】各コア30a,30bは、各ハーフ21
a,21bに形成されるコア収納部26a,26bに収
納され、保持部27a,27bによってそれぞれ保持さ
れる。好ましくは、図5に示すようにコア収納部26
a,26bは、各ハーフ21a,21bの接続部25が
形成される側の辺に沿って配置される。そして、各ハー
フ21a,21bの接続部25が形成されない側の辺
(接続部25から見て解放端側)と各コア30a,30
bとの間に、ケーブル40のコア30の軸方向に沿って
露出する半周部分40aを収納するケーブル収納部22
a,22bが形成される。ケーブル収納部22a,22
bは、その幅がケーブル40の直径とほぼ等しくなるよ
うに選ばれる。また、各コア30a,30bの互いに対
向・接触する面は、組立て時に隙間が発生して磁気ギャ
ップを生じないように厳密に平坦に形成されている。
Each core 30a, 30b is connected to each half 21
a, 21b are accommodated in the core accommodating portions 26a, 26b, and held by the holding portions 27a, 27b, respectively. Preferably, as shown in FIG.
a, 26b are arranged along the side of each half 21a, 21b on the side where the connecting portion 25 is formed. The sides of the halves 21a and 21b on the side where the connection portion 25 is not formed (the open end side as viewed from the connection portion 25) and the cores 30a and 30b
b, a cable housing portion 22 for housing a semi-peripheral portion 40a exposed along the axial direction of the core 30 of the cable 40.
a, 22b are formed. Cable storage sections 22a, 22
b is chosen such that its width is approximately equal to the diameter of the cable 40. The surfaces of the cores 30a and 30b that face each other and are in contact with each other are strictly flat so that no gap is generated during assembly and no magnetic gap is generated.
【0017】各ハーフ21a,21bのケーブル収納部
22a,22bが形成される解放端の辺に沿う、ケーブ
ル収納部22a,22bの外側には、一対の係合部23
a,23bが形成される。係合部23aは、ケース20
の内側方向に突出し、その先端部は鉤状に形成された係
合爪であり、係合部23bは係合部23aを受入れ可能
な開口に形成され、係合部23aの爪の受部を構成す
る。係合部23aと23bが係合することにより、各ハ
ーフ21a,21bをケース20として筒状に構成す
る。なお、係合部23aは、ケーブル40をハーフ21
bに装着する際のガイドとして作用する。
A pair of engaging portions 23 are provided outside the cable storage portions 22a and 22b along the sides of the open ends where the cable storage portions 22a and 22b of the halves 21a and 21b are formed.
a, 23b are formed. The engaging portion 23a is
The engaging portion 23b is formed in an opening capable of receiving the engaging portion 23a, and the engaging portion 23b is formed in an opening capable of receiving the engaging portion 23a. Configure. By engaging the engaging portions 23a and 23b, the halves 21a and 21b are formed as a case 20 into a cylindrical shape. In addition, the engaging portion 23a connects the cable 40 to the half 21.
Acts as a guide when mounting on b.
【0018】さらに、ハーフ21bにおいて、係合部2
3a,23aのほぼ中間部には、ケーブル40をハーフ
21bに装着した際に、コア30の軸方向に沿って露出
する半周部分40aを浮き上がらないように押さえる押
さえ部28がケース20の内側に突出して形成されてい
る。押さえ部28の先端部はケーブル40aを押さえる
ために、コア30bの方向にL字状に折り曲げられてい
る。
Further, in the half 21b, the engaging portion 2
At a substantially intermediate portion between the cores 3a and 23a, when the cable 40 is mounted on the half 21b, a holding portion 28 for holding the half-peripheral portion 40a exposed along the axial direction of the core 30 so as not to float up projects into the case 20. It is formed. The tip of the holding portion 28 is bent in an L-shape in the direction of the core 30b to hold the cable 40a.
【0019】次に、ケーブル40に本願のフィルタ10
を装着する場合を説明する。まず、フィルタ10を、接
続部25を中心として、各ハーフ21a,21bを開い
た状態(図5の状態)で準備する。次に、ケーブル40
をコア30bの内周面に沿って挿通する。ケーブル40
の一方側をコア30bの一方端でケーブル収納部22b
側に折り曲げる。ケーブル40をケーブル収納部22b
に沿って挿通する際には、係合部23a,23aおよび
押さえ部28に、それぞれケーブルのコア30の軸方向
に沿って露出する半周部分40aを当接させて、装着中
にケーブル40が浮き上がらないようにする。ケーブル
収納部22bを経由したケーブル40は、さらにコア3
0bの他方端でコア30bの内周側に折り曲げられ、再
度、コア30bの内周面に沿って挿通される。ケーブル
40の一方および他方両端は、組立て状態において各ハ
ーフ21a,21bの間に挟み込まれないように、切欠
部24b,24bに位置するよう修正される。そして、
この状態で、各ハーフ21a,21bを接続部25を中
心に回動し、係合部23a,23bを係合させることに
よりフィルタ10が筒状に形成され、ケーブル40はコ
ア30に一周半(1.5回)巻き付けられた状態で、ケ
ース20の内部を貫通し、フィルタ10のケーブル40
に対する装着が完了する。
Next, the filter 10 of the present invention is connected to the cable 40.
The case of mounting is described. First, the filter 10 is prepared with the halves 21a and 21b open (the state of FIG. 5) with the connection part 25 as the center. Next, the cable 40
Through the inner peripheral surface of the core 30b. Cable 40
Is connected to one end of the core 30b by the cable storage portion 22b.
Fold it to the side. Connect the cable 40 to the cable storage section 22b.
When the cable 40 is inserted along, the semi-circumferential portions 40a exposed along the axial direction of the core 30 of the cable are respectively brought into contact with the engaging portions 23a, 23a and the pressing portion 28, so that the cable 40 rises during mounting. Not to be. The cable 40 that has passed through the cable storage section 22b further has a core 3
0b is bent toward the inner peripheral side of the core 30b at the other end, and is inserted again along the inner peripheral surface of the core 30b. One and other ends of the cable 40 are modified to be located in the cutouts 24b, 24b so as not to be pinched between the halves 21a, 21b in the assembled state. And
In this state, the halves 21a and 21b are rotated about the connection portion 25, and the engagement portions 23a and 23b are engaged to form the filter 10 into a tubular shape. 1.5 times), while being wound, penetrates the inside of the case 20 and
Is completed.
【0020】装着状態において、ケーブル40はコア3
0a,30bによって挟持されるとともに、コア30の
軸方向に沿って露出する半周部分40aもケース20に
よってコア30の方向に押しつけられる(図4参照)。
コア30a,30bは、係合手段23a,23bの係合
によって、対向平坦面を介して圧接される。コア30
a,30bが圧接されることにより、コア30内部を貫
通するケーブル40は、ケーブル40の外周を覆う絶縁
材料が備える弾性によって互いに及びコア30に密着す
る。
In the mounted state, the cable 40
The half-peripheral portion 40a that is sandwiched between the cores 0a and 30b and that is exposed along the axial direction of the core 30 is also pressed toward the core 30 by the case 20 (see FIG. 4).
The cores 30a, 30b are pressed against each other via the opposing flat surfaces by the engagement of the engagement means 23a, 23b. Core 30
When the a and 30b are pressed against each other, the cables 40 penetrating through the core 30 come into close contact with each other and the core 30 by the elasticity of the insulating material covering the outer periphery of the cable 40.
【0021】これによって、ケーブル40はコア30に
対して、その内部を貫通する一対(2本分)およびコア
30の軸方向に沿って露出する半周部分40aの何れも
が密着することができ、ノイズ吸収効率を格段に向上さ
せることができる。
As a result, both the pair (two wires) penetrating the inside of the cable 40 and the half-peripheral portion 40a exposed along the axial direction of the core 30 can be in close contact with the core 30, Noise absorption efficiency can be significantly improved.
【0022】また、ケーブル40はコア30に巻き付け
られている部分全てがケース20内に収納され、さらに
係合部23a,23aおよび押さえ部28によって保持
されているため、半周部分40aが弛んだり、この部分
が引っ張られて傷が付いたりすることを完全に防止でき
る。さらに、組立ても簡単で既存のケーブルにも容易に
装着でき、見た目もすっきりしている。
Further, since the entire portion of the cable 40 wound around the core 30 is housed in the case 20 and further held by the engaging portions 23a, 23a and the pressing portion 28, the semi-circumferential portion 40a is loosened. This part can be completely prevented from being pulled and damaged. Furthermore, it is easy to assemble, can be easily attached to existing cables, and has a clean appearance.
【0023】[0023]
【発明の効果】本発明によれば、円筒形のコアにケーブ
ルを密着して巻き付けることができ、さらに、コアの外
周に露出する部分のケーブルもケース内部に形成された
ケーブル収納部によってコアに対して密着させられるた
め、ケーブルとフェライトコアとの間に不要な隙間が発
生せず、フィルタ装着部分におけるノイズ吸収効率を格
段に向上させることができる。
According to the present invention, the cable can be wound tightly around the cylindrical core, and the part of the cable exposed on the outer periphery of the core can be wound around the core by the cable housing formed inside the case. As a result, no unnecessary gap is generated between the cable and the ferrite core, and the noise absorption efficiency at the filter mounting portion can be significantly improved.
【0024】また、ケーブルのコアに巻き付けられる部
分は全てケースの内部に収納されるため、コアに対する
ケーブルの巻き付け状態が緩むこともなく、装着当初の
ノイズ吸収効率が低下することも防止できる。
Further, since the entire portion of the cable wound around the core is housed in the case, the winding state of the cable around the core is not loosened, and the noise absorption efficiency at the time of mounting is prevented from being reduced.
【0025】以上説明したとおり、本発明によれば、ケ
ーブルをアンテナとして輻射される電磁波ノイズを有効
に除去できるとともに、既存のケーブルにも簡単に装着
することができ、装着部分においてケーブルが傷ついた
り緩んだりすることもなく、見た目にもすっきりとした
不要輻射防止フィルタを提供することができる。
As described above, according to the present invention, the electromagnetic noise radiated by using the cable as an antenna can be effectively removed, and the cable can be easily attached to an existing cable. It is possible to provide an unnecessary radiation prevention filter that is not visually loosened and has a clean appearance.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本願発明に係る不要輻射防止フィルタの一実施
例10を示す平面図
FIG. 1 is a plan view showing a tenth embodiment of an unwanted radiation prevention filter according to the present invention.
【図2】図1実施例の側面図FIG. 2 is a side view of the embodiment of FIG. 1;
【図3】図1実施例の図2の線III−IIIにおける
横断面図
3 is a cross-sectional view of the embodiment of FIG. 1 taken along the line III-III in FIG. 2;
【図4】図1実施例の図1の線IV−IVにおける縦断
面図
FIG. 4 is a longitudinal sectional view of the embodiment of FIG. 1 taken along line IV-IV in FIG. 1;
【図5】図1実施例の図2の線III−IIIに沿って
展開した内部詳細図
5 is a detailed internal view of the embodiment of FIG. 1 developed along the line III-III of FIG. 2;
【図6】従来例の概略を示す概略図FIG. 6 is a schematic diagram showing an outline of a conventional example.
【図7】従来例の改良案の概略を示す概略図FIG. 7 is a schematic diagram showing an outline of an improvement plan of a conventional example.
【符号の説明】[Explanation of symbols]
10 不要輻射防止フィルター 20 ケース 30 フェライトコア 40 ケーブル 10 Unwanted radiation prevention filter 20 Case 30 Ferrite core 40 Cable

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】円筒形状のフェライトコアにケーブルを挿
    通することにより、ケーブルをアンテナとして輻射する
    不要な電磁波を除去するための不要輻射防止フィルタで
    あって、 一対の半円筒形状のフェライトコア、 絶縁性材料から成り、前記一対のフェライトコアを収納
    するコア収納部を有し、一対のフェライトコアの軸方向
    の両端部の近傍に前記ケーブルを通す貫通孔をそれぞれ
    形成し、一対のものを組み合わせることによって筒状形
    状となるケース、および前記一対のケースの前記フェラ
    イトコアの軸方向に沿う一辺で互いに回動自在に接続す
    る接続部を備え、 前記一対のケースは、さらに互いに回動して係合させた
    ときに、前記一対のケースを筒状に保持する係合部と、 前記一対のフェライトコアを前記一対のケースのそれぞ
    れのコア収納部に収納した状態で固定的に保持する保持
    部と、 前記一対のフェライトコアの周辺面と前記係合部との間
    に、前記ケーブルを収納するケーブル収納部とを形成し
    てなり、 前記ケーブルが前記フェライトコアを貫通するように軸
    方向に沿って巻き付けられ、フェライトコアの周面に沿
    うケーブルの部分が前記ケーブル収納部に収納され、ケ
    ーブルの一方部分と他方部分が前記貫通孔にそれぞれ通
    されたことを特徴とする、不要輻射防止フィルタ。
    An unnecessary radiation prevention filter for removing unnecessary electromagnetic waves radiating from a cable as an antenna by inserting a cable through a cylindrical ferrite core, comprising: a pair of semi-cylindrical ferrite cores; Having a core storage portion made of a conductive material and storing the pair of ferrite cores, forming through holes through which the cables pass near both ends in the axial direction of the pair of ferrite cores, and combining the pair of ferrite cores And a connecting portion rotatably connected to one side of the pair of cases along the axial direction of the ferrite core. The pair of cases further rotate and engage with each other. And an engaging portion for holding the pair of cases in a cylindrical shape, and connecting the pair of ferrite cores to respective cores of the pair of cases. A holding portion fixedly held in a state stored in the storage portion, and a cable storage portion for storing the cable is formed between a peripheral surface of the pair of ferrite cores and the engagement portion, The cable is wound along the axial direction so as to penetrate the ferrite core, a portion of the cable along a peripheral surface of the ferrite core is stored in the cable storage portion, and one and other portions of the cable are inserted into the through hole. An unnecessary radiation prevention filter characterized by being passed through each.
  2. 【請求項2】前記フェライトコアの内径は、前記ケーブ
    ルの直径のほぼ2倍に選ばれ、 前記ケーブルが、前記フェライトコアの内径部分を2回
    貫通するように巻かれることを特徴とする、請求項1記
    載の不要輻射防止フィルタ。
    2. The ferrite core according to claim 1, wherein an inner diameter of the ferrite core is selected to be approximately twice as large as a diameter of the cable, and the cable is wound twice so as to pass through an inner diameter portion of the ferrite core. Item 6. An unnecessary radiation prevention filter according to Item 1.
  3. 【請求項3】前記係合部は、円筒形状の一方端部と他方
    端部にそれぞれ形成され、 前記ケースは、前記ケーブル収納部における前記2つの
    係合部の間に、前記ケーブルを押さえるための押さえ部
    がさらに形成される、請求項1記載の不要輻射防止フィ
    ルタ。
    3. The case is formed at one end and the other end of a cylindrical shape, and the case presses the cable between the two engagement portions in the cable storage portion. The unnecessary radiation prevention filter according to claim 1, further comprising a pressing portion.
JP15795097A 1997-05-30 1997-05-30 Unwanted radiation prevention filter Pending JPH10335147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15795097A JPH10335147A (en) 1997-05-30 1997-05-30 Unwanted radiation prevention filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15795097A JPH10335147A (en) 1997-05-30 1997-05-30 Unwanted radiation prevention filter

Publications (1)

Publication Number Publication Date
JPH10335147A true JPH10335147A (en) 1998-12-18

Family

ID=15661014

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15795097A Pending JPH10335147A (en) 1997-05-30 1997-05-30 Unwanted radiation prevention filter

Country Status (1)

Country Link
JP (1) JPH10335147A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6469589B2 (en) 1999-12-03 2002-10-22 Sumitomo Wiring Systems, Ltd. Noise filter with an outer wire fixing portion on the core case
JP2007237348A (en) * 2006-03-09 2007-09-20 Mitsubishi Electric Corp Wire electric discharge machining apparatus
US7319376B2 (en) 2005-11-29 2008-01-15 Tdk Corporation Noise filter
JP2011003560A (en) * 2009-06-16 2011-01-06 Nec Tokin Corp Inductance element
WO2018168378A1 (en) * 2017-03-15 2018-09-20 株式会社オートネットワーク技術研究所 Wire harness system and method for suppressing ringing in wire harness system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6469589B2 (en) 1999-12-03 2002-10-22 Sumitomo Wiring Systems, Ltd. Noise filter with an outer wire fixing portion on the core case
US7319376B2 (en) 2005-11-29 2008-01-15 Tdk Corporation Noise filter
JP2007237348A (en) * 2006-03-09 2007-09-20 Mitsubishi Electric Corp Wire electric discharge machining apparatus
JP4513772B2 (en) * 2006-03-09 2010-07-28 三菱電機株式会社 Wire electrical discharge machine
JP2011003560A (en) * 2009-06-16 2011-01-06 Nec Tokin Corp Inductance element
WO2018168378A1 (en) * 2017-03-15 2018-09-20 株式会社オートネットワーク技術研究所 Wire harness system and method for suppressing ringing in wire harness system

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