JPH118124A - Noise filter - Google Patents

Noise filter

Info

Publication number
JPH118124A
JPH118124A JP17287697A JP17287697A JPH118124A JP H118124 A JPH118124 A JP H118124A JP 17287697 A JP17287697 A JP 17287697A JP 17287697 A JP17287697 A JP 17287697A JP H118124 A JPH118124 A JP H118124A
Authority
JP
Japan
Prior art keywords
magnetic body
signal line
noise filter
insertion portion
segments
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
JP17287697A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ushimaru
康弘 牛丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
O II L KK
Original Assignee
O II L KK
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 O II L KK filed Critical O II L KK
Priority to JP17287697A priority Critical patent/JPH118124A/en
Publication of JPH118124A publication Critical patent/JPH118124A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coils Or Transformers For Communication (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a noise filter, which enables a toroidal magnetic body to correspond to a large diameter signal guide and also to a flexible low signal guide and at the same time, enables also to mount after installation of the magnetic body. SOLUTION: A magnetic body 12 is formed into a toroidal having a through hole 20 in the central axial direction and is constituted of one pair of segments 14 and 16, by a method wherein fellow circular end surfaces 18 are made contact with each other and are combined into one. An insertion hole 25 is constituted of a first insertion part 26 which is extendedly provided in the peripheral direction in the interior of the magnetic body 12, and second insertion parts 28 which communicate the insertion part 26 with a circumferential end surface 19. These insertion parts 26 and 28 are formed in a state that the parts 26 and 28 are opened in a circular end surface 18 extending over their total lengths. A signal guide 30 is positioned in such a way that the intermediate part 30a of the guide 30 is made to extend along the insertion part 26 from the outside of the end surface 18, and at the same time, both intermediate parts 30b of the guide 30 are made to extend along the insertion parts 28 and both segments 14 and 16 are made to combine into one in this state that the guide 30 is positioned.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、電子機器の内部
で発生した磁界,電磁波や、電子機器の外部で発生して
信号線を介して流入する磁界,電磁波を、該電子機器の
信号線に配設した磁性体により吸収するようにしたノイ
ズフィルタに関するものである。
The present invention relates to a magnetic field and an electromagnetic wave generated inside an electronic device and a magnetic field and an electromagnetic wave generated outside the electronic device and flowing through a signal line to a signal line of the electronic device. The present invention relates to a noise filter adapted to be absorbed by a magnetic material provided.

【0002】[0002]

【従来の技術】近年パーソナルコンピュータやワードプ
ロセッサ等のOA機器を代表とする各種電子機器が広く
普及しているが、これら電子機器から発生する電磁波が
周囲に設置した他の電子機器に障害(EMI)を与え、誤
動作等をはじめとする弊害を及すことがある。そこで、
電子機器内に配設した各基板間を接続する信号線や、電
子機器同志を電子的に接続する信号線等において、これ
ら信号線に流れる電流の開閉に伴う周波数で生じる磁
界,雑音磁界により放出される電磁波に関しては、信号
線の外周部をフェライト等を材質とする磁性体で包囲し
たり、磁性体に直接的に信号線を巻回させることによ
り、磁界,電磁波を該磁性体で吸収するノイズフィルタ
が実用化されている。
2. Description of the Related Art In recent years, various electronic devices such as personal computers and word processors, such as OA devices, have become widespread. However, electromagnetic waves generated from these electronic devices may interfere with other electronic devices installed around them (EMI). And adverse effects such as malfunctions may be caused. Therefore,
Signal lines that connect between the boards arranged in the electronic device and signal lines that connect the electronic devices electronically, etc. are emitted by the magnetic field and noise magnetic field generated at the frequency associated with the opening and closing of the current flowing through these signal lines. With respect to the electromagnetic waves to be generated, the outer periphery of the signal line is surrounded by a magnetic material made of ferrite or the like, or the signal line is directly wound around the magnetic material, thereby absorbing the magnetic field and the electromagnetic wave with the magnetic material. Noise filters have been put to practical use.

【0003】例えば図7に示すノイズフィルタ50は、
「ソレノイド型」の磁性体51を軸方向へ2分割して形成
した円弧状セグメント52,53を、互いに突き合わせ
て貫通孔54に信号線55を位置させることにより、該
信号線55の外周部を該磁性体51で包囲する形態のも
のである。このノイズフィルタ50は、主に電子機器と
電子機器を連結する信号線55等に発生するノイズを吸
収するために実施するものであり、図示しない樹脂製の
保護ケースに収納保持した状態で該信号線55の所定位
置に後付けしたり、該信号線55の製造時に被覆材内に
一体的に内装した状態に配設して使用に供される。また
図9に示すノイズフィルタ60は、「トロイド型」に形成
した磁性体61に対し、信号線63を通孔62に挿通し
ながら全周に亘って巻回させる形態のものである。この
ノイズフィルタ60は、主に電子機器内に配設した基板
用の信号線63に発生するノイズを吸収する場合に好適
に実施され、該電子機器の内部の所定位置に適宜方法で
固定して使用に供される。
For example, a noise filter 50 shown in FIG.
The arc-shaped segments 52 and 53 formed by dividing the “solenoid type” magnetic body 51 into two in the axial direction are abutted with each other to position the signal line 55 in the through hole 54, so that the outer peripheral portion of the signal line 55 is formed. This is a form surrounded by the magnetic body 51. The noise filter 50 is implemented to absorb noise mainly generated in the signal line 55 connecting the electronic devices with each other. The noise filter 50 is stored and held in a resin protective case (not shown). The signal line 55 may be attached to a predetermined position later, or may be used in a state where the signal line 55 is provided integrally with the covering material when the signal line 55 is manufactured. The noise filter 60 shown in FIG. 9 has a form in which a signal line 63 is wound around the entire circumference while being inserted into a hole 62 around a magnetic body 61 formed in a “toroid type”. This noise filter 60 is preferably implemented when absorbing noise generated mainly on the signal line 63 for the substrate disposed in the electronic device, and is fixed to a predetermined position inside the electronic device by an appropriate method. Served for use.

【0004】[0004]

【発明が解決しようとする課題】ところで前記各ノイズ
フィルタ50,60は、夫々に優れた長所および特徴を
具有している一方で、多少の短所をも内在している。す
なわち前者のノイズフィルタ50では、電子機器の外部
における露出した部分に好適に実施されると共に後付け
も可能であるから、両端を所定位置に連結した信号線5
5に対して取外しや取付けおよび交換等を容易になし得
る利点がある。しかるに、磁性体51がソレノイド型
(直線円筒状)を呈して磁路が空間に対して開いているた
め、図8に示す如く、磁性体51に閉じ込められずに空
中を通る「漏れ磁束」が発生し、回路中や磁性体間の迷結
合の原因となる問題点が指摘される。しかも、磁束が磁
性体51の軸心と必ずしも平行ではないため、磁性体5
1の全長が短い場合にはインダクタンスが簡単な形に近
似されない欠点等を内在している。
Each of the noise filters 50 and 60 has excellent advantages and features, but has some inherent disadvantages. That is, in the former noise filter 50, since the noise filter 50 is preferably implemented on an exposed portion outside the electronic device and can be retrofitted, the signal line 5 having both ends connected to predetermined positions is provided.
5 has an advantage that it can be easily removed, attached, replaced, and the like. However, the magnetic body 51 is a solenoid type
(Linear cylindrical shape) and the magnetic path is open to the space. As shown in FIG. 8, "leakage magnetic flux" which passes through the air without being confined in the magnetic body 51 is generated, and is generated in the circuit or the magnetic body. Problems that cause stray coupling between them are pointed out. Moreover, since the magnetic flux is not always parallel to the axis of the magnetic body 51,
In the case where the overall length of 1 is short, there is a disadvantage that the inductance is not approximated to a simple form.

【0005】また後者のノイズフィルタ60では、磁性
体61がトロイド型(ドーナツ状)を呈して断面がどこで
も同一な回転対称形であると共にどの断面でも一定の曲
率で曲がっているので、磁路として見た場合には、図1
0に示す如く、磁束がどの断面でも均一的に分布して滑
らかにつながる特徴がある。すなわち、磁性体61内の
磁束は該磁性体61外の状態の変化等に影響されず、磁
束が磁性体61内に閉じ込められるので外部へ漏れるこ
とがなく、更に電磁誘導現象を起こさない等、極めて安
定したノイズフィルタとなり得る。しかるにこのノイズ
フィルタ60は、通孔62に信号線63を挿通しながら
トロイド型の磁性体61に巻回させる形態であるから、
既に両端を所定位置に連結した信号線63を巻回させて
後付けすることは不可能である。しかも、電子機器同志
を連結する前記信号線55の如く太径の信号線や柔軟性
の低い信号線等は、磁性体61に沿って巻回させること
が不可能であるから、このような信号線には対応し得な
い欠点も内在している。更に、信号線63を巻回させた
磁性体61を保護ケースで覆蓋することが困難であり、
電子機器の外部には配設し得ない等の欠点も指摘され
る。
Further, in the latter noise filter 60, the magnetic body 61 has a toroidal shape (donut shape), the cross section is the same rotationally symmetrical shape everywhere, and the cross section is bent at a constant curvature in any cross section. Figure 1
As shown in FIG. 0, the magnetic flux has a feature that it is uniformly distributed in any cross section and smoothly connected. That is, the magnetic flux in the magnetic body 61 is not affected by a change in the state outside the magnetic body 61, and the magnetic flux is confined in the magnetic body 61, so that the magnetic flux does not leak to the outside and further does not cause an electromagnetic induction phenomenon. An extremely stable noise filter can be obtained. However, since the noise filter 60 is configured to be wound around the toroidal magnetic body 61 while inserting the signal line 63 into the through hole 62,
It is impossible to wind the signal line 63 having both ends connected to a predetermined position and to retrofit it. In addition, a large-diameter signal line or a low-flexibility signal line such as the signal line 55 connecting the electronic devices cannot be wound along the magnetic body 61. There are inherent drawbacks that cannot be accommodated with lines. Furthermore, it is difficult to cover the magnetic body 61 around which the signal line 63 is wound with a protective case,
It is pointed out that it cannot be installed outside the electronic equipment.

【0006】[0006]

【発明の目的】本発明は、前述した課題を解決するべく
新規に提案されたものであって、ノイズ吸収に優れたト
ロイド型の磁性体において、その内部における周方向に
信号線の挿通孔を形成して、太径の信号線や柔軟性の低
い信号線にも対応し得るように形成すると共に、後付け
装着をも可能としたノイズフィルタを提供することを目
的とする。
SUMMARY OF THE INVENTION The present invention has been newly proposed to solve the above-mentioned problem. In a toroidal magnetic material excellent in noise absorption, a signal line insertion hole is provided in a circumferential direction inside the toroidal magnetic material. An object of the present invention is to provide a noise filter which can be formed so as to be compatible with a large-diameter signal line or a signal line having low flexibility, and which can be mounted later.

【0007】[0007]

【課題を解決するための手段】前述した課題を克服し、
所期の目的を達成するため本発明に係るノイズフィルタ
は、磁性体の内部に画成した挿通孔に信号線を挿通さ
せ、この信号線から発生する電磁波等を該磁性体により
吸収するようにしたノイズフィルタにおいて、前記磁性
体は、中央軸方向に通孔を有するトロイド型に形成され
ると共に、軸方向に2分割されて円形端面同志を当接し
て合体する一対のセグメントで構成され、前記挿通孔
は、前記磁性体の内部で周方向に亘ってリング状に形成
される第1挿通部と、該磁性体の径方向に延在して第1
挿通部と円周端面とを連通する第2挿通部とから構成さ
れると共に、これら第1挿通部と第2挿通部は、その全
長に亘って前記円形端面に開口した状態で形成され、前
記セグメントの円形端面の外側から、信号線の適宜中間
部分を前記第1挿通部に沿わせると共に、該中間部分に
連続する中間両側部分を第2挿通部に沿わせて位置決め
し、この状態で円形端面同志を当接して両セグメントを
合体させることにより、信号線が磁性体の内部で周方向
へ回旋した状態で挿通されるよう構成したことを特徴と
する。
[Means for solving the problems] To overcome the above-mentioned problems,
In order to achieve the intended purpose, the noise filter according to the present invention is configured such that a signal line is inserted into an insertion hole defined inside a magnetic body, and an electromagnetic wave or the like generated from the signal line is absorbed by the magnetic body. In the noise filter, the magnetic body is formed in a toroidal shape having a through hole in the central axis direction, and is formed of a pair of segments that are divided into two in the axial direction and come into contact with each other by abutting the circular end faces. The insertion hole has a first insertion portion formed in a ring shape in a circumferential direction inside the magnetic body, and a first insertion portion extending in a radial direction of the magnetic body.
The first insertion portion and the second insertion portion are formed so as to be open to the circular end surface over the entire length thereof, and the second insertion portion is configured to communicate with the insertion portion and the circumferential end surface. From the outside of the circular end face of the segment, an appropriate intermediate portion of the signal line is made to extend along the first insertion portion, and both intermediate intermediate portions that are continuous with the intermediate portion are positioned along the second insertion portion. By combining the two segments by contacting the end faces, the signal line is inserted in a state of being rotated in the circumferential direction inside the magnetic body.

【0008】[0008]

【発明の実施の形態】次に本発明に係るノイズフィルタ
につき、好適な実施例を挙げて、添付図面を参照しなが
ら以下説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a noise filter according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.

【0009】図1は、本発明の実施例に係るノイズフィ
ルタ10を分解状態で示す概略斜視図であり、このノイ
ズフィルタ10は、例えばフェライト等を材質とするト
ロイド型の磁性体12を本体とし、この磁性体12は長
さ方向における略中間部で軸方向に2分割するセグメン
ト14,16として構成される。なお、本実施例のセグ
メント14,16は、同一形状に成形したものを実施す
る場合を例示しているので、図1における下方のセグメ
ント16についてのみ説明することとする。
FIG. 1 is a schematic perspective view showing an exploded state of a noise filter 10 according to an embodiment of the present invention. This noise filter 10 has a toroidal magnetic body 12 made of, for example, ferrite or the like as a main body. The magnetic body 12 is configured as segments 14 and 16 that are divided into two in the axial direction at a substantially middle portion in the length direction. In addition, since the segments 14 and 16 of the present embodiment exemplify the case where they are formed into the same shape, only the lower segment 16 in FIG. 1 will be described.

【0010】セグメント16は、図1および図2に示す
如く、所定長および所定径の円柱体において、円形端面
18の中央に軸方向へ延在する円形の通孔20を形成す
ることにより、全体としてトロイド型(ドーナツ状)の円
筒体に形成されている。前記通孔20は、その軸心とセ
グメント16の軸心とが一致するように形成してあるの
で、該セグメント16は周方向の断面がどこでも同一で
ある回転対称形を呈している。また円形端面18側に
は、所定幅および深さに設定した円形状のリング溝22
が凹設されていると共に、該リング溝22と円周端面1
9との間には、直線状の半円溝24,24が、適宜間隔
をおいて平行に形成されている。
As shown in FIGS. 1 and 2, the segment 16 is formed by forming a circular through hole 20 extending in the axial direction at the center of the circular end face 18 in a cylindrical body having a predetermined length and a predetermined diameter. As a toroidal (doughnut-shaped) cylindrical body. Since the through hole 20 is formed such that its axis coincides with the axis of the segment 16, the segment 16 has a rotationally symmetric shape in which the cross section in the circumferential direction is the same everywhere. A circular ring groove 22 having a predetermined width and depth is provided on the circular end face 18 side.
And the ring groove 22 and the circumferential end face 1 are recessed.
9, straight semicircular grooves 24, 24 are formed in parallel at appropriate intervals.

【0011】このように同一形状に成形した2つのセグ
メント14,16を、各半円溝24,24同志が整合する
ように互いの円形端面18,18を当接して合体させる
ことにより、トロイド型の磁性体12が形成される。そ
して実施例の磁性体12では、図2および図3に示す如
く、各セグメント14,16のリング溝22,22同志が
整合することにより円周方向へ延在するリング状の第1
挿通部26が画成されると共に、各半円溝24,24に
より第1挿通部26と磁性体12の外部とを連通する2
本の第2挿通部28,28が画成され、これら第1挿通
部26および第2挿通部28,28により信号線挿通孔
25が画成される。すなわち、信号線挿通孔25は、第
1挿通部26および第2挿通部28,28の全長におい
て、各円形端面18に開口した状態で形成されている。
The two segments 14, 16 formed in the same shape in this manner are brought together by abutting their circular end faces 18, 18 so that the semicircular grooves 24, 24 are aligned with each other, thereby forming a toroidal type. Is formed. In the magnetic body 12 of the embodiment, as shown in FIGS. 2 and 3, the ring grooves 22, 22 of the segments 14, 16 are aligned with each other to form a ring-shaped first ring extending in the circumferential direction.
An insertion portion 26 is defined, and the first insertion portion 26 and the outside of the magnetic body 12 communicate with each other by the semicircular grooves 24, 24.
The second insertion portions 28, 28 are defined, and the first insertion portion 26 and the second insertion portions 28, 28 define the signal line insertion hole 25. That is, the signal line insertion hole 25 is formed in the entire length of the first insertion portion 26 and the second insertion portions 28, 28 so as to be open to each circular end face 18.

【0012】前述の如く構成された本実施例のノイズフ
ィルタ10は、信号線30を前記信号線挿通孔25に挿
通して磁性体12の内部に延在させる構成となってい
る。具体的には、図1,図2および図3に示す如く、信
号線30の適宜中間部分30aを前記第1挿通部26に
沿った状態に延在させると共に、該中間部分30aに連
続した中間両側部分30b,30bを各第2挿通部28,
28に沿った状態に延在させる。すなわち対象の信号線
30は、一方の第2挿通部28を介して磁性体12の内
部へ入り、第1挿通部26に沿って該磁性体12の内部
で周方向へ一度回旋した後に、他方の第2挿通部28を
介して磁性体12の外部へ延出するように挿通される。
The noise filter 10 according to the present embodiment having the above-described configuration has a configuration in which the signal line 30 is inserted into the signal line insertion hole 25 and extends inside the magnetic body 12. Specifically, as shown in FIGS. 1, 2 and 3, an appropriate intermediate portion 30a of the signal line 30 is extended along the first insertion portion 26, and the intermediate portion 30a is connected to the intermediate portion 30a. Both side portions 30b, 30b are connected to each second insertion portion 28,
28. That is, the target signal line 30 enters the inside of the magnetic body 12 through the one second insertion portion 28, and once turns in the circumferential direction inside the magnetic body 12 along the first insertion portion 26, and then turns into the other. Is inserted so as to extend to the outside of the magnetic body 12 through the second insertion portion 28.

【0013】なお本実施例のノイズフィルタ10では、
図4に示す如く、磁性体12を構成する各セグメント1
4,16を、所定形状の保護ケース32に収容した状態
で使用に供するようになっている。この保護ケース32
は、弾性変形可能な合成樹脂(例えばナイロンやポリエ
チレン等)等を材質とし、セングメント14(16)を好
適に収容保持し得る内部空間38を有する有底円筒体状
の第1半体34と第2半体36とが、外周端面に形成し
た蝶番部材40により枢着されている。そして、各内部
空間38,38内に各セグメント14,16を円形端面1
8が露出する向きにセットした後に夫々の半体34,3
6を閉鎖すれば、前記蝶番部材40の反対側に形成した
係合部42,44同志が係合して、各セグメント14,1
6は夫々の円形端面18,18を当接した状態で保護ケ
ース32内に内装される。
In the noise filter 10 of the present embodiment,
As shown in FIG. 4, each of the segments 1
4, 16 are used in a state where they are accommodated in a protective case 32 having a predetermined shape. This protective case 32
The first half 34 having a cylindrical shape with a bottom is formed of a synthetic resin (e.g., nylon or polyethylene) which can be elastically deformed and has an inner space 38 which can appropriately receive and hold the segment 14 (16). The two halves 36 are pivotally connected by a hinge member 40 formed on the outer peripheral end surface. Then, each of the segments 14 and 16 is placed in each of the internal spaces 38 and 38 with the circular end face 1.
Each half 34,3 after setting in the direction where 8 is exposed
6 is closed, the engaging portions 42, 44 formed on the opposite side of the hinge member 40 are engaged with each other, so that each segment 14, 1
6 is housed in the protective case 32 with the respective circular end surfaces 18 and 18 in contact with each other.

【0014】[0014]

【実施例の作用について】次に、前述のように構成され
た本発明の実施例に係るノイズフィルタの作用につき説
明する。図4に例示するように、保護ケース32の第1
半体34および第2半体36の各内部空間38,38
に、セグメント14,16を夫々円形端面18を露出さ
せた向きに収納することにより、該セグメント14,1
6からなる磁性体12で構成されるノイズフィルタ10
が形成される。
Next, the operation of the noise filter according to the embodiment of the present invention configured as described above will be described. As illustrated in FIG.
Each internal space 38, 38 of the half 34 and the second half 36
By storing the segments 14 and 16 in the directions in which the circular end surfaces 18 are exposed,
Filter 10 composed of a magnetic body 12 made of
Is formed.

【0015】そして、対象とする信号線30に対して装
着する場合には、保護ケース32における第1半体34
と第2半体36とを開成し、図1に示す如く、該信号線
30における中間部分30aを、例えば下方のセグメン
ト16の円形端面18の外側からリング溝22に沿わせ
る。更に、信号線30における中間部分30aの中間両
側部分30b,30bを、セグメント16の円形端面1
8の外側から半円溝24,24に沿わせる。そして、セ
グメント16におけるリング溝22および半円溝24,
24に沿って信号線30を仮に位置決めした状態で、第
1半体34と第2半体36とを互いに閉鎖して係合部4
2,44を係合させる。これによりセグメント14,16
は、円形端面18,18を互いに当接させた状態に保持
され、リング溝22,22同志が整合して画成される第
1挿通部26と、各半円溝24,24同志が整合して画
成される第2挿通部28,28に沿って前記信号線30
が挿通された状態となる。
When mounting on the target signal line 30, the first half 34 of the protection case 32
And the second half 36 is opened, and as shown in FIG. 1, the intermediate portion 30a of the signal line 30 is made to extend along the ring groove 22 from outside the circular end face 18 of the lower segment 16, for example. Further, the intermediate side portions 30b, 30b of the intermediate portion 30a of the signal line 30 are connected to the circular end face 1 of the segment 16.
8 along the semicircular grooves 24, 24. Then, the ring groove 22 and the semicircular groove 24 in the segment 16,
In a state where the signal line 30 is temporarily positioned along the first half 24, the first half 34 and the second half 36 are closed to each other and
Engage 2,44. This allows segments 14, 16
The first insertion portion 26 in which the circular end faces 18, 18 are held in contact with each other and the ring grooves 22, 22 are aligned with each other, and the semicircular grooves 24, 24 are aligned with each other. The signal line 30 extends along the second insertion portions 28, 28 defined by
Is inserted.

【0016】そして、信号線30に電流が流れることに
生じた磁界や電磁波による磁束は、図5に示す如く、ノ
イズフィルタ10の磁性体12において、周方向に連続
して滑らかに回転するようになる。すなわち、本実施例
のノイズフィルタ10における磁性体12は、トロイド
型の回転対称形でどの断面でも同一の曲率となるよう形
成してあるので、磁束はどの断面でも略同一に分布して
いる。また、磁性体12における磁路が閉じているので
空中を通る漏れ磁束が発生することがなく、回路中や磁
性体間の迷結合の原因となることはない。
As shown in FIG. 5, the magnetic field generated by the current flowing in the signal line 30 and the magnetic flux generated by the electromagnetic wave are continuously and smoothly rotated in the magnetic body 12 of the noise filter 10 in the circumferential direction. Become. That is, since the magnetic body 12 in the noise filter 10 of the present embodiment is formed in a toroidal rotationally symmetrical shape so as to have the same curvature in any cross section, the magnetic flux is distributed substantially the same in any cross section. Further, since the magnetic path in the magnetic body 12 is closed, no leakage magnetic flux passing through the air is generated, and no stray coupling is caused in a circuit or between magnetic bodies.

【0017】[0017]

【変更例】前記実施例では、磁性体12に画成した信号
線挿通孔25における第1挿通部26に対し、信号線3
0の中間部分30aを1回だけ回旋させるようにしたノ
イズフィルタ10を例示した。しかし、本発明のノイズ
フィルタ10の形態によれば、図6に示す如く、各セグ
メント14,16におけるリング溝22の深さを大きく
設定して第1挿通部26を幅広に形成すれば、第1挿通
部26に対して信号線30を複数回に亘って回旋させ得
るようになる。すなわち、磁性体12内に延在する信号
線30の挿通部分を長くすることが可能となるから、同
一直径の磁性体12で数倍のノイズ吸収能力を得ること
ができる利点がある。
Modification In the above embodiment, the signal line 3 is inserted into the first insertion portion 26 in the signal line insertion hole 25 defined in the magnetic body 12.
The noise filter 10 in which the intermediate portion 30a of 0 is turned only once is illustrated. However, according to the form of the noise filter 10 of the present invention, as shown in FIG. 6, if the depth of the ring groove 22 in each of the segments 14 and 16 is set to be large and the first insertion portion 26 is formed to be wide, The signal line 30 can be rotated a plurality of times with respect to one insertion portion 26. That is, it is possible to lengthen the insertion portion of the signal line 30 extending into the magnetic body 12, so that there is an advantage that the magnetic body 12 having the same diameter can obtain several times the noise absorbing ability.

【0018】また実施例のノイズフィルタ10では、ト
ロイド型の磁性体12を軸方向へ2分割した形態とした
ので、両端を所定位置へ連結した信号線30に対して簡
単に後付けすることが可能である。しかも、磁性体12
内に画成した第1挿通部26が該磁性体12の周方向へ
延在するように構成してあるので、該磁性体12のサイ
ズを前提として曲率半径を大きく設定することも可能と
なり、電子機器同志を接続する太径の信号線や柔軟性の
低い信号線であっても好適に対応して装着し得る利点も
ある。
In the noise filter 10 of the embodiment, the toroidal magnetic body 12 is divided into two parts in the axial direction, so that it can be easily retrofitted to the signal line 30 having both ends connected to predetermined positions. It is. Moreover, the magnetic material 12
Since the first insertion portion 26 defined inside is configured to extend in the circumferential direction of the magnetic body 12, it is possible to set a large radius of curvature based on the size of the magnetic body 12, There is also an advantage that even a large-diameter signal line or a low-flexibility signal line for connecting electronic devices can be suitably mounted.

【0019】なお前記実施例では、磁性体12を構成す
る各セグメント14,16を同一形状に形成したものを
例示したが、両セグメント14,16は外形直径および
通孔20の内径を同一とすれば、異なる形状としてもよ
い。すなわち、信号線挿通孔25を例えば一方のセグメ
ント16にだけ形成し、他方のセグメント14は単なる
円筒体に形成しても、信号線30を磁性体12の周方向
に挿通することが可能であり、両セグメント14,16
を当接して合体すれば該信号線30を挿通する信号線挿
通孔25を画成して、該信号線30に対する適切なノイ
ズ吸収をなし得る。また前記実施例では、信号線挿通孔
25の第2挿通部28,28を磁性体12における外周
側の円周端面19に開口した形態を例示したが、この第
2挿通部28,28を前記通孔20に面した円周端面に
開口して、信号線30を該通孔20側から磁性体12の
内部へ挿通するようにしてもよい。更に前記保護ケース
32は、磁性体12を好適に保護および保持し得る形
状,形態であれば、実施例で示したものに限定されるも
のではない。
In the above embodiment, the segments 14 and 16 constituting the magnetic body 12 are formed in the same shape. However, the two segments 14 and 16 have the same outer diameter and the same inner diameter of the through hole 20. However, different shapes may be used. That is, even if the signal line insertion hole 25 is formed in, for example, only one segment 16 and the other segment 14 is formed in a simple cylindrical body, the signal line 30 can be inserted in the circumferential direction of the magnetic body 12. , Both segments 14, 16
Are brought into contact with each other to form a signal line insertion hole 25 through which the signal line 30 is inserted, so that appropriate noise absorption for the signal line 30 can be achieved. In the above embodiment, the second insertion portions 28, 28 of the signal line insertion hole 25 are illustrated as being opened at the circumferential end face 19 on the outer peripheral side of the magnetic body 12. However, the second insertion portions 28, 28 are formed as described above. An opening may be provided on the circumferential end face facing the through hole 20 so that the signal line 30 is inserted into the magnetic body 12 from the through hole 20 side. Further, the protective case 32 is not limited to those shown in the embodiments as long as it has a shape and a form that can suitably protect and hold the magnetic body 12.

【0020】[0020]

【発明の効果】以上説明した如く、本発明に係るノイズ
フィルタによれば、ノイズ吸収能力の優れたトロイド型
の磁性体において、信号線用の挿通孔を該磁性体の内部
で周方向に延在するリング状に形成すると共に、軸方向
に2分割するセグメントで構成した。しかも挿通孔は、
両セグメントが互いに当接する円形端面に全長に亘って
開口した状態に形成してあるので、信号線を円形端面の
外側から該挿通孔に沿って位置決めしてから両セグメン
トを合体させれば、該信号線の適宜中間部分を周方向に
回旋した状態で磁性体の内部に挿通させることができ
る。すなわち本発明のノイズフィルタでは、トロイド型
の磁性体を、両端が所定位置に接続された信号線に対し
ても簡単かつ容易に取付け,取外しが可能となる極めて
有益な効果を奏する。しかも、リング状の挿通孔に対し
て信号線を複数回に亘って回旋させた状態で挿通させれ
ば、磁性体に対する信号線の挿通部分を長くすることが
可能となり、同一直径の磁性体でノイズ吸収能力を数倍
に高めることも可能となる利点もある。
As described above, according to the noise filter of the present invention, in the toroidal magnetic body having excellent noise absorbing ability, the insertion hole for the signal line extends in the circumferential direction inside the magnetic body. It is formed in a ring shape and is composed of segments divided into two in the axial direction. Moreover, the insertion hole is
Since both segments are formed so as to be open over the entire length of the circular end faces that abut against each other, if the signal lines are positioned along the insertion holes from the outside of the circular end faces, and then the two segments are combined, The intermediate portion of the signal line can be inserted into the magnetic body in a state of being rotated in the circumferential direction. That is, the noise filter according to the present invention has a very advantageous effect that the toroidal magnetic body can be easily and easily attached to and detached from a signal line having both ends connected to predetermined positions. Moreover, if the signal line is inserted into the ring-shaped insertion hole in a state of being rotated a plurality of times, it is possible to lengthen the portion where the signal line is inserted into the magnetic body. There is also an advantage that the noise absorbing ability can be increased several times.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の好適な実施例に係るノイズフィルタを
分解状態で示す概略斜視図である。
FIG. 1 is a schematic perspective view showing a noise filter according to a preferred embodiment of the present invention in an exploded state.

【図2】実施例のノイズフィルタを一部破断して示す平
面図である。
FIG. 2 is a plan view showing the noise filter according to the embodiment, partially cut away;

【図3】実施例のノイズフィルタを一部破断して示す側
面図である。
FIG. 3 is a side view showing the noise filter of the embodiment with a part cut away.

【図4】実施例のノイズフィルタを保護ケース内に収納
して実施する状態を示す斜視図である。
FIG. 4 is a perspective view showing a state in which the noise filter according to the embodiment is accommodated in a protective case and implemented.

【図5】信号線に電流を流することにより実施例のノイ
ズフィルタにおける磁束の発生状態を示す説明図であ
る。
FIG. 5 is an explanatory diagram showing a state in which magnetic flux is generated in a noise filter according to the embodiment by flowing a current through a signal line.

【図6】変更例に係るノイズフィルタを分解状態で示す
概略斜視図である。
FIG. 6 is a schematic perspective view showing a noise filter according to a modified example in an exploded state.

【図7】従来のソレノイド型のノイズフィルタを実施状
態で示す概略斜視図である。
FIG. 7 is a schematic perspective view showing a conventional solenoid type noise filter in a practical state.

【図8】ソレノイド型のノイズフィルタにおいて両端部
から漏れ磁束が発生する状態を示す説明図である。
FIG. 8 is an explanatory diagram showing a state where leakage magnetic flux is generated from both ends in a solenoid type noise filter.

【図9】従来のトロイド型のノイズフィルタを実施状態
で示す概略斜視図である。
FIG. 9 is a schematic perspective view showing a conventional toroidal noise filter in an implemented state.

【図10】トロイド型のノイズフィルタにおける磁束の
発生状態を示す説明図である。
FIG. 10 is an explanatory diagram showing a state of generation of magnetic flux in a toroid type noise filter.

【符号の説明】[Explanation of symbols]

12 磁性体 14,16 セグメント 18 円形端面 19 円周端面 20 通孔 25 挿通孔 26 第1挿通部 28 第2挿通部 30 信号線 30a 中間部分 30b 中間両側部分 DESCRIPTION OF SYMBOLS 12 Magnetic body 14, 16 segment 18 Circular end surface 19 Circular end surface 20 Through hole 25 Insertion hole 26 1st penetration part 28 2nd penetration part 30 Signal line 30a Intermediate part 30b Intermediate both sides part

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 磁性体(12)の内部に画成した挿通孔(25)
に信号線(30)を挿通させ、この信号線(30)から発生する
電磁波等を該磁性体(12)により吸収するようにしたノイ
ズフィルタにおいて、 前記磁性体(12)は、中央軸方向に通孔(20)を有するトロ
イド型に形成されると共に、軸方向に2分割されて円形
端面(18,18)同志を当接して合体する一対のセグメント
(14,16)で構成され、 前記挿通孔(25)は、前記磁性体(12)の内部で周方向に亘
ってリング状に形成される第1挿通部(26)と、該磁性体
(12)の径方向に延在して第1挿通部(26)と円周端面(19)
とを連通する第2挿通部(28,28)とから構成されると共
に、これら第1挿通部(26)と第2挿通部(28,28)は、そ
の全長に亘って前記円形端面(18)に開口した状態で形成
され、 前記セグメント(14,16)の円形端面(18,18)の外側から、
信号線(30)の適宜中間部分(30a)を前記第1挿通部(26)
に沿わせると共に、該中間部分(30a)に連続する中間両
側部分(30b,30b)を第2挿通部(28,28)に沿わせて位置決
めし、この状態で円形端面(18,18)同志を当接して両セ
グメント(14,16)を合体させることにより、信号線(30)
が磁性体(12)の内部で周方向へ回旋した状態で挿通され
るよう構成したことを特徴とするノイズフィルタ。
An insertion hole (25) defined inside a magnetic body (12).
In a noise filter in which a signal line (30) is inserted through and the electromagnetic body or the like generated from the signal line (30) is absorbed by the magnetic body (12), the magnetic body (12) extends in the central axis direction. A pair of segments formed in a toroidal shape having a through hole (20) and divided into two in the axial direction to abut and join the circular end faces (18, 18).
(14, 16), the insertion hole (25), a first insertion portion (26) formed in a ring shape in the circumferential direction inside the magnetic body (12), and the magnetic body
The first insertion portion (26) extending in the radial direction of (12) and the circumferential end surface (19)
And a second insertion portion (28, 28) that communicates with the first end portion (28, 28). The first insertion portion (26) and the second insertion portion (28, 28) extend over the entire length of the circular end face (18, 28). ) Is formed in an open state, from outside the circular end faces (18, 18) of the segments (14, 16),
Insert the appropriate intermediate portion (30a) of the signal line (30) into the first insertion portion (26).
And the intermediate side portions (30b, 30b) continuous with the intermediate portion (30a) are positioned along the second insertion portion (28, 28), and in this state, the circular end faces (18, 18) Abutting the two segments (14, 16) to form a signal line (30)
The noise filter is configured to be inserted in a state of being rotated in the circumferential direction inside the magnetic body (12).
【請求項2】 前記信号線(30)は、第1挿通部(26)に対
して前記中間部分(30a)を1回または複数回に亘って回
旋した状態で挿通孔(25)に挿通される請求項1記載のノ
イズフィルタ。
2. The signal line (30) is inserted through the insertion hole (25) in a state where the intermediate portion (30a) is turned one or more times with respect to the first insertion portion (26). The noise filter according to claim 1.
JP17287697A 1997-06-13 1997-06-13 Noise filter Pending JPH118124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17287697A JPH118124A (en) 1997-06-13 1997-06-13 Noise filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17287697A JPH118124A (en) 1997-06-13 1997-06-13 Noise filter

Publications (1)

Publication Number Publication Date
JPH118124A true JPH118124A (en) 1999-01-12

Family

ID=15949953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17287697A Pending JPH118124A (en) 1997-06-13 1997-06-13 Noise filter

Country Status (1)

Country Link
JP (1) JPH118124A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013232585A (en) * 2012-05-01 2013-11-14 Alps Green Devices Co Ltd Coil component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013232585A (en) * 2012-05-01 2013-11-14 Alps Green Devices Co Ltd Coil component

Similar Documents

Publication Publication Date Title
JPH0529152A (en) Shield components
JPH0760956B2 (en) Noise absorber
US5793273A (en) Choke coil for suppressing common-mode noise and normal-mode noise
KR100278131B1 (en) Choke coil
JPS5851201B2 (en) Spiral tape measuring device
JPH118124A (en) Noise filter
JP3302620B2 (en) Noise absorber
US6160466A (en) Electric noise absorber
US4689592A (en) Combined transformer and inductor
US5200730A (en) Premolded suppressor sleeve
US6529087B2 (en) Noise removing filter for electronic equipment with a ferrite flanged core
ATE5924T1 (en) SINGLE-PHASE TRANSFORMER WITH WINDINGS CAST IN RESIN.
JPH07230915A (en) Noise absorber
JPH11214941A (en) Noise filter
JPH11354346A (en) Isolation transformer
JPH03261116A (en) Magnetic core for signal line filter
JP2842428B2 (en) Noise absorber
JPS6144407Y2 (en)
JPH0245905A (en) Converter transformer
JP4862726B2 (en) Noise absorber
JPH0432732Y2 (en)
JPH0758482A (en) Electromagnetic shielding structure for cable
JPH10319134A (en) Magnetic object detection sensor
JPH0739208Y2 (en) Electromagnetic device
JPS6339954Y2 (en)