JPH08321426A - Choke coil - Google Patents

Choke coil

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Publication number
JPH08321426A
JPH08321426A JP12849195A JP12849195A JPH08321426A JP H08321426 A JPH08321426 A JP H08321426A JP 12849195 A JP12849195 A JP 12849195A JP 12849195 A JP12849195 A JP 12849195A JP H08321426 A JPH08321426 A JP H08321426A
Authority
JP
Japan
Prior art keywords
winding
choke coil
bobbin
exposed portions
exposed
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.)
Withdrawn
Application number
JP12849195A
Other languages
Japanese (ja)
Inventor
Yasuo Nagasawa
康夫 長澤
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.)
TDK Lambda Corp
Original Assignee
TDK Lambda Corp
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 TDK Lambda Corp filed Critical TDK Lambda Corp
Priority to JP12849195A priority Critical patent/JPH08321426A/en
Publication of JPH08321426A publication Critical patent/JPH08321426A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE: To prevent generation of abnormal sound and short circuiting between wirings caused by a high voltage by a simple constitution. CONSTITUTION: A first wiring 24 and a second wiring 25 are wound around a bobbin 21. Projections 29a, 29b, 29c, 29d are formed integrally in a mount surface 26 of the bobbin 21. Exposed parts 33, 34 are formed in a winding start part 31 and a winding end part 32 of the first wiring 24 and the second wiring 25. The exposed parts 33, 34 are fixed to the projections 29a, 29b, 29c, 29d. Therefore, generation of abnormal sound and short circuiting between the first wiring 24 and the second wiring 25 are prevented by spark discharge between the exposed parts 33, 34. This is attained simply by fitting each of the exposed parts 33, 34 to the projections 29a, 29b, 29c, 29d which are formed integrally with the bobbin 21.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、電源装置の入力部に設
けられるコモンモードチョークコイルなどのチョークコ
イルに関し、特に、高電圧による巻線間の放電現象を回
避するためのチョークコイルに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a choke coil such as a common mode choke coil provided in an input portion of a power supply device, and more particularly to a choke coil for avoiding a discharge phenomenon between windings due to a high voltage.

【0002】[0002]

【従来の技術】一般に、この種のチョークコイルは、樹
脂製のボビンに絶縁被覆された巻線を巻装して構成さ
れ、例えば特開平4−22086号公報に開示されるよ
うに、コモンモードノイズを除去するコモンモードチョ
ークコイルとして、電源回路の入力ライン間に挿入接続
されている。こうした電源装置の一例を図3に基づき説
明すると、1,2は交流入力電圧が印加される入力端子
であり、コンデンサ3を介してコモンモードチョークコ
イル(以下、単にチョークコイルと称する。)4が接続
される。また、入力電圧ラインと接地ライン間に各々ラ
インバイパス用のコンデンサ5,6を接続するととも
に、チョークコイル4の出力側の入力電源ライン間にコ
ンデンサ7を接続して、コモンモードノイズおよびノー
マルモードノイズを除去するフィルタ回路8を構成して
いる。なお、9は接地ラインに接続される接地端子であ
る。フィルタ回路8を通過した交流入力電圧は整流平滑
回路10により整流平滑され、直流入力電圧として電源回
路11の入力側に印加される。
2. Description of the Related Art Generally, a choke coil of this type is constructed by winding a wire wound on a bobbin made of resin and having an insulating coating. For example, as disclosed in Japanese Patent Laid-Open No. 4-22086, a common mode coil is used. A common mode choke coil that removes noise is inserted and connected between the input lines of the power supply circuit. An example of such a power supply device will be described with reference to FIG. 3. Reference numerals 1 and 2 denote input terminals to which an AC input voltage is applied, and a common mode choke coil (hereinafter, simply referred to as a choke coil) 4 via a capacitor 3. Connected. Also, capacitors 5 and 6 for line bypass are connected between the input voltage line and the ground line, respectively, and a capacitor 7 is connected between the input power supply lines on the output side of the choke coil 4 to prevent common mode noise and normal mode noise. To form a filter circuit 8 that removes. Reference numeral 9 is a ground terminal connected to the ground line. The AC input voltage that has passed through the filter circuit 8 is rectified and smoothed by the rectifying and smoothing circuit 10 and applied as a DC input voltage to the input side of the power supply circuit 11.

【0003】こうした構成では、例えばノイズシミュレ
ーション試験などにおいて、パルス状のノイズ信号を交
流入力電圧に重畳させてフィルタ回路8に印加した場
合、チョークコイル4を構成する巻線の入力部と出力部
間で放電現象が発生し、異音が発生したり、最悪の場合
は巻線間がショート(短絡)に至る不具合が生じてい
た。したがって、前述の特開平4−22086号公報で
は、チョークコイル4の巻始め部および巻終り部に接続
されるプリント基板のパターン間に放電用ギャップを形
成して、チョークコイル4の巻線以外の箇所で強制的に
火花放電を行なわせるようにしている。
With such a configuration, for example, in a noise simulation test or the like, when a pulsed noise signal is superimposed on an AC input voltage and applied to the filter circuit 8, between the input section and the output section of the winding constituting the choke coil 4. Then, a discharge phenomenon occurred, abnormal noise was generated, and in the worst case, there was a problem that a short circuit occurred between the windings. Therefore, in the above-mentioned Japanese Patent Application Laid-Open No. 4-22086, a discharge gap is formed between the patterns of the printed circuit board connected to the winding start portion and the winding end portion of the choke coil 4 so that a portion other than the winding of the choke coil 4 is formed. A spark discharge is forcibly performed at a place.

【0004】[0004]

【発明が解決しようとする課題】上記従来技術のプリン
ト基板による放電手段は、少なくともチョークコイルと
は別体のプリント基板に放電用ギャップを形成しなけれ
ばその効果を発揮することができず、製造コストの上昇
を招くといった問題がある。また、使用者側の要求など
に応じて放電電圧の異なる様々な耐圧のチョークコイル
4を用いたフィルタ回路8を得ようとする場合、従来
は、ギャップ幅の異なる複数種のプリント基板を用意し
なければならず、耐圧に応じたチョークコイル4を用い
たフィルタ回路8の設計を簡単に行なうことができな
い。
The above-mentioned conventional printed circuit board discharge means cannot exhibit its effect unless the discharge gap is formed at least in the printed circuit board separate from the choke coil. There is a problem that it causes an increase in cost. Further, in order to obtain the filter circuit 8 using the choke coils 4 having various withstand voltages different in discharge voltage according to the request of the user, conventionally, a plurality of types of printed boards having different gap widths are prepared. Therefore, it is not possible to easily design the filter circuit 8 using the choke coil 4 according to the breakdown voltage.

【0005】本発明はこのような問題点を解決するため
になされたものであり、その目的とは、プリント基板な
どの別部材を一切用いずに、簡単な構成で高電圧による
異音の発生や巻線間のショートを防ぐことのできるチョ
ークコイルを得ることにある。
The present invention has been made in order to solve such a problem, and its purpose is to generate an abnormal noise due to a high voltage with a simple structure without using any other member such as a printed circuit board. And to obtain a choke coil that can prevent short-circuiting between windings.

【0006】また、本発明の他の目的は、放電電圧の異
なる様々な耐圧のチョークコイルを用いたフィルタ回路
を設計的に簡単に得ることにある。
Another object of the present invention is to easily obtain a filter circuit using various choke coils having different withstand voltages and different withstand voltage in terms of design.

【0007】[0007]

【課題を解決するための手段】請求項1に記載のチョー
クコイルは、絶縁被覆された巻線をボビンに巻装してな
るチョークコイルにおいて、前記巻線の巻始め部および
巻終り部に被覆のない露出部を各々形成するとともに、
前記各露出部を係止する突起を該露出部間が放電可能と
なる位置に前記ボビンと一体形成して構成される。
A choke coil according to a first aspect of the present invention is a choke coil which is obtained by winding an insulation-coated winding on a bobbin, and covering a winding start portion and a winding end portion of the winding. With each exposed part without
A protrusion that locks each exposed portion is integrally formed with the bobbin at a position where discharge can occur between the exposed portions.

【0008】また、請求項2に記載のチョークコイル
は、請求項1記載の構成に加えて、前記突起を複数形成
して前記各露出部を選択的に係止するように構成したも
のである。
The choke coil according to a second aspect of the invention is, in addition to the configuration of the first aspect, configured to form a plurality of the protrusions so as to selectively lock the exposed portions. .

【0009】[0009]

【作用】請求項1の構成によれば、従来のようなプリン
ト基板などの別部材を一切用いることなく、突起をボビ
ンと同時に一体形成し、この突起に各露出部を係止させ
るだけの簡単な構成で、突起により位置決めされた露出
部間で強制的に火花放電を行なわせることができるた
め、これにより高電圧による異音の発生や巻線のショー
トを防ぐことが可能となる。
According to the structure of claim 1, the projection is integrally formed at the same time as the bobbin without using a separate member such as a printed circuit board, and the exposed portions are simply locked to the projection. With such a configuration, since spark discharge can be forcibly performed between the exposed portions positioned by the protrusions, it is possible to prevent generation of abnormal noise and short circuit of the winding due to high voltage.

【0010】また、請求項2の構成によれば、各露出部
を複数の突起のどの位置に係止させるかによって、チョ
ークコイルの放電電圧を容易に変えることができる。
According to the second aspect of the invention, the discharge voltage of the choke coil can be easily changed depending on which position of the plurality of protrusions the respective exposed portions are locked.

【0011】[0011]

【実施例】以下、添付図面である図1および図2に基づ
き、本発明の一実施例を詳述する。この図1および図2
に示す本実施例のチョークコイルは、図3におけるフィ
ルタ回路8のコモンモードチョークコイル4として用い
られるものである。21は絶縁性を有する合成樹脂製のボ
ビンであり、このボビン21の中央部22には、フランジ23
を挾んで絶縁被覆された巻線たる第1の巻線24と第2の
巻線25が別々に巻装される。ボビン21の左右両側には、
半田デイップ面に相当する略平坦な載置面26が形成され
ており、この載置面26に外部との接続を可能にする一対
の導電性ピン27,28が、第1の巻線24および第2の巻線
25に対応して設けられる。また、導電性ピン27,28のや
や内側には、ボビン21の成形する際に複数の突起29a,
29b,29c,29dが同時に一体形成される。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, FIG. 1 and FIG. This FIG. 1 and FIG.
The choke coil of the present embodiment shown in FIG. 3 is used as the common mode choke coil 4 of the filter circuit 8 in FIG. 21 is a bobbin made of synthetic resin having an insulating property.
A first winding 24 and a second winding 25, which are insulation-coated windings, are separately wound. On both left and right sides of bobbin 21,
A substantially flat mounting surface 26 corresponding to the solder dip surface is formed, and a pair of conductive pins 27, 28 enabling connection with the outside are formed on the mounting surface 26 by the first winding 24 and Second winding
It is provided corresponding to 25. Also, on the inner side of the conductive pins 27, 28, a plurality of projections 29a,
29b, 29c and 29d are integrally formed at the same time.

【0012】第1の巻線24および第2の巻線25は、ボビ
ン21の中央部22から載置面26にかけて巻始め部31と巻終
り部32が各々引出されており、これらの巻始め部31およ
び巻終り部32の先端部が導電性ピン27,28に半田付け接
続される。また、この導電性ピン27,28への半田付けの
際に載置面26をデイップすることにより、巻始め部31お
よび巻終り部32の絶縁被覆は剥離し、ここに被覆のない
線材を露出した露出部33,34が形成される。本実施例で
は、第1の巻線24および第2の巻線25の各巻始め部31が
3本の巻線に分岐しており、これらの巻線に形成された
露出部33が、各々突起29a,29b,29cに係止してい
る。また、第1の巻線24および第2の巻線25の各巻終り
部32に形成された露出部34が、別の突起29dに係止して
いる。突起29a,29b,29cと突起29dとは、露出部3
3,34間が所定の電圧で放電可能となるような位置に予
め設けられている。なお、41はボビン21の中空部を貫通
して設けられるUU型の磁性部材を組合わせたコアであ
る。
In the first winding 24 and the second winding 25, a winding start portion 31 and a winding end portion 32 are respectively drawn from the central portion 22 of the bobbin 21 to the mounting surface 26. The tip ends of the portion 31 and the winding end portion 32 are soldered and connected to the conductive pins 27 and 28. Also, by dipping the mounting surface 26 during soldering to the conductive pins 27 and 28, the insulating coating of the winding start portion 31 and the winding end portion 32 is peeled off, and the wire material without coating is exposed here. The exposed portions 33 and 34 are formed. In this embodiment, each winding start portion 31 of each of the first winding wire 24 and the second winding wire 25 is branched into three winding wires, and the exposed portions 33 formed on these winding wires are respectively projected. It is locked to 29a, 29b, 29c. Further, the exposed portion 34 formed on each winding end portion 32 of the first winding wire 24 and the second winding wire 25 is locked to another protrusion 29d. The protrusions 29a, 29b, 29c and the protrusion 29d are the exposed portions 3
The part between 3 and 34 is provided in advance so that it can be discharged at a predetermined voltage. Reference numeral 41 is a core which is provided by penetrating the hollow portion of the bobbin 21 and is made up of a combination of UU type magnetic members.

【0013】次に、上記実施例の構成につきその作用を
説明する。先ず、チョークコイルの製造に際し、第1の
巻線24および第2の巻線25をボビン21に巻装して、各巻
始め部31および巻終り部32の先端を導電性ピン27,28に
巻き付ける。その後、図示しない半田槽内の半田溶解面
に載置面26を浸すと、巻始め部31および巻終り部32の先
端が導電性ピン27,28の半田付け接続されるとともに、
載置面26よりも下方に位置する巻始め部31および巻終り
部32の被覆が剥がれ、この露出部33,34に半田が付着す
る。巻始め部31に形成される露出部33および巻終り部32
に形成される露出部34は、これらの各露出部33,34を係
止する突起29a,29b,29c,29dにより各々位置決め
されており、露出部33,34に所定の電圧差が生じると、
この間で放電が行なわれるようになっている。
Next, the operation of the configuration of the above embodiment will be described. First, in manufacturing a choke coil, the first winding wire 24 and the second winding wire 25 are wound around the bobbin 21, and the tips of the winding start portion 31 and the winding end portion 32 are wound around the conductive pins 27 and 28. . After that, when the mounting surface 26 is immersed in the solder melting surface in a solder bath (not shown), the tips of the winding start portion 31 and the winding end portion 32 are soldered and connected to the conductive pins 27 and 28,
The coating of the winding start portion 31 and the winding end portion 32 located below the mounting surface 26 is peeled off, and the solder adheres to the exposed portions 33 and 34. Exposed portion 33 and winding end portion 32 formed on winding start portion 31
The exposed portions 34 formed at are positioned by the projections 29a, 29b, 29c, 29d that lock the exposed portions 33, 34, respectively, and when a predetermined voltage difference occurs between the exposed portions 33, 34,
Discharge is performed during this period.

【0014】こうして得られた本実施例のチョークコイ
ルは、例えば図3に示すコモンモードチョークコイル4
に適用される。この場合、一方の導電性ピン27を各々入
力端子1,3に接続し、他方の導電性ピン28を整流平滑
回路10の入力側に各々接続すると、第1の巻線24および
第2の巻線25とコア41との磁気的結合により、交流入力
電圧に重畳されるコモンモードノイズを除去できる。
The choke coil of this embodiment thus obtained is, for example, the common mode choke coil 4 shown in FIG.
Applied to In this case, if one conductive pin 27 is connected to the input terminals 1 and 3 and the other conductive pin 28 is connected to the input side of the rectifying / smoothing circuit 10, the first winding 24 and the second winding 24 are connected. Due to the magnetic coupling between the line 25 and the core 41, common mode noise superimposed on the AC input voltage can be removed.

【0015】また、ノイズシミュレーション試験など
で、パルス状のノイズ信号を交流入力電圧に重畳させて
フィルタ回路8に印加すると、チョークコイル4本来の
作用によりノイズ信号が抑制され、第1の巻線24あるい
は第2の巻線25の巻始め部31と巻終り部32との間に電位
差が発生して、露出部33,34間で強制的に火花放電が起
こる。この場合、先ず、突起29cに係止する露出部33と
露出部34との間から火花放電が起き始め、巻始め部31と
巻終り部32間の電位差が大きくなるにしたがって、突起
部29bに係止する露出部33と露出部34、および突起部29
aに係止する露出部33と露出部34との間からも順次火花
放電が起き始めるようになる。こうして、ボビン21から
導電性ピン27,28に引出された巻始め部31および巻終り
部32の露出部間33,34で火花放電が起こることによっ
て、高電圧による異音の発生や第1の巻線24あるいは第
2の巻線25のショートを防ぐことができる。
When a pulsed noise signal is superimposed on the AC input voltage and applied to the filter circuit 8 in a noise simulation test or the like, the noise signal is suppressed by the original function of the choke coil 4, and the first winding 24 Alternatively, a potential difference is generated between the winding start portion 31 and the winding end portion 32 of the second winding 25, and a spark discharge is forcibly generated between the exposed portions 33 and 34. In this case, first, spark discharge begins to occur between the exposed portion 33 and the exposed portion 34 that are locked to the protrusion 29c, and as the potential difference between the winding start portion 31 and the winding end portion 32 increases, the protrusion 29b is exposed. Exposed part 33 and exposed part 34 to be locked, and protruding part 29
Spark discharge also starts to occur sequentially between the exposed portion 33 and the exposed portion 34 that are locked to a. In this way, spark discharge occurs between the exposed portions 33 and 34 of the winding start portion 31 and the winding end portion 32 pulled out from the bobbin 21 to the conductive pins 27 and 28, which causes abnormal noise due to high voltage and the first noise. It is possible to prevent a short circuit of the winding wire 24 or the second winding wire 25.

【0016】本実施例のチョークコイルは、第1の巻線
24および第2の巻線25の巻始め部31および巻終り部32に
被覆のない露出部33,34を各々形成するとともに、各露
出部33,34を係止する突起29a,29b,29c,29dを露
出部33,34間が放電可能となる位置にボビン21と一体形
成しているので、従来のようなプリント基板などの別部
材を一切用いることなく、突起29a,29b,29c,29d
をボビン21と同時に一体形成し、この突起29a,29b,
29c,29dに各露出部33,34を係止させるだけの簡単な
構成で、突起29a,29b,29c,29dにより位置決めさ
れた露出部33,34間で強制的に火花放電を行なわせるこ
とができるため、これにより高電圧による異音の発生や
第1の巻線24あるいは第2の巻線25のショートを防ぐこ
とが可能となる。
The choke coil of this embodiment has a first winding.
The uncovered exposed portions 33, 34 are formed on the winding start portion 31 and the winding end portion 32 of the second winding 25 and the projections 29a, 29b, 29c for locking the exposed portions 33, 34, respectively. Since 29d is integrally formed with the bobbin 21 at a position where discharge can be made between the exposed portions 33 and 34, the protrusions 29a, 29b, 29c and 29d can be formed without using any separate member such as a conventional printed circuit board.
Is integrally formed with the bobbin 21 at the same time, and the protrusions 29a, 29b,
With a simple configuration in which the exposed portions 33, 34 are locked to the 29c, 29d, a spark discharge can be forcibly performed between the exposed portions 33, 34 positioned by the protrusions 29a, 29b, 29c, 29d. Therefore, it is possible to prevent generation of abnormal noise and short circuit of the first winding 24 or the second winding 25 due to the high voltage.

【0017】なお本実施例では、第1の巻線24および第
2の巻線25の各巻始め部31を3本の巻線で構成している
が、単一の巻線からなる巻始め部31の露出部33を、突起
29a,29b,29cのいずれか一箇所に係止させながら導
電性ピン27に接続してもよい。すなわち、巻始め部31お
よび巻終り部32に形成される露出部33,34の数は、特に
限定されるものではない。勿論、突起29a,29b,29c
あるいは突起29dを多数設けて、これに一乃至複数の露
出部33,34を選択的に係止させることも可能である。突
起29a,29b,29cと突起29dとの間隔が短いほど、露
出部33,34間は低電圧で火花放電を開始することから、
露出部33を突起29a,29b,29cのどの位置に係止させ
るかによって、チョークコイルの放電電圧を容易に変え
ることができる。
In this embodiment, each winding start portion 31 of the first winding 24 and the second winding 25 is composed of three windings, but the winding start portion consisting of a single winding is used. Project the exposed part 33 of 31
It may be connected to the conductive pin 27 while being locked at any one of 29a, 29b and 29c. That is, the number of exposed portions 33 and 34 formed on the winding start portion 31 and the winding end portion 32 is not particularly limited. Of course, the protrusions 29a, 29b, 29c
Alternatively, it is possible to provide a large number of protrusions 29d and selectively engage one or a plurality of exposed portions 33, 34 with the protrusions 29d. As the distance between the protrusions 29a, 29b, 29c and the protrusion 29d is shorter, the spark discharge starts at a lower voltage between the exposed portions 33, 34.
The discharge voltage of the choke coil can be easily changed depending on which position of the protrusions 29a, 29b, 29c the exposed portion 33 is locked to.

【0018】このように、少なくとも突起29a,29b,
29cを複数形成し、この突起29a,29b,29cに露出部
33,34を選択的に係止させるように構成すれば、同一の
チョークコイルでありながら、突起29a,29b,29cの
位置を決めるだけで、チョークコイルの放電電圧を容易
に変えることができ、放電電圧の異なる様々な耐圧のチ
ョークコイルを設計的に簡単に得ることが可能となる。
また、各突起29a,29b,29c,29dは前述のようにボ
ビン21と同時に一体形成されるため、突起29a,29b,
29c,29dを幾つ形成しても、製造コストの上昇を招か
ないという利点もある。
Thus, at least the protrusions 29a, 29b,
A plurality of 29c are formed, and exposed portions are formed on these protrusions 29a, 29b, 29c.
If the 33 and 34 are configured to be selectively locked, the discharge voltage of the choke coil can be easily changed by deciding the positions of the protrusions 29a, 29b and 29c even though they are the same choke coil. It is possible to easily obtain choke coils with various withstand voltages having different discharge voltages in terms of design.
Further, since the protrusions 29a, 29b, 29c, 29d are integrally formed simultaneously with the bobbin 21 as described above, the protrusions 29a, 29b,
There is also an advantage that no increase in manufacturing cost is caused no matter how many 29c and 29d are formed.

【0019】ところで、導電性ピン27,28と突起29a,
29b,29c,29dとを、同一の平坦面に形成していない
場合には、巻始め部31および巻終り部32に露出部33,34
を形成した後、導電ピン27,28への半田付け作業を行な
わなければならず、作業工程が増えて、製造コストの低
減を図れないといった問題がある。これに対して、本実
施例では、ボビン21に半田ディップ面となる略平坦な載
置面26を形成し、第1の巻線24あるいは第2の巻線25を
係止する突起29a,29b,29c,29dと、巻始め部31お
よび巻終り部32の先端部を半田付け接続する導電性ピン
27,28とをこの載置面26に設けているので、導電性ピン
27,28への半田付けの際に載置面26をデイップすると同
時に、巻始め部31および巻終り部32の絶縁被覆が剥離し
て、ここに放電部となる露出部33,34が形成される。し
たがって、作業工程を短縮することができ、製造コスト
の低減を図ることができる。
By the way, the conductive pins 27, 28 and the protrusions 29a,
When 29b, 29c, and 29d are not formed on the same flat surface, exposed portions 33 and 34 are formed at the winding start portion 31 and the winding end portion 32.
After the formation, the soldering work to the conductive pins 27, 28 has to be performed, and there is a problem that the manufacturing process cannot be reduced because the number of working processes increases. On the other hand, in this embodiment, the bobbin 21 is formed with a substantially flat mounting surface 26 serving as a solder dip surface, and the projections 29a and 29b for locking the first winding 24 or the second winding 25 are formed. , 29c, 29d and the conductive pins for soldering and connecting the leading ends of the winding start portion 31 and the winding end portion 32.
Since 27 and 28 are provided on this mounting surface 26, the conductive pin
At the same time as dipping the mounting surface 26 during soldering to 27, 28, the insulating coatings of the winding start portion 31 and the winding end portion 32 are peeled off, and exposed portions 33, 34 to be discharge portions are formed here. It Therefore, the working process can be shortened and the manufacturing cost can be reduced.

【0020】本発明は上記実施例に限定されるものでは
なく、本発明の要旨の範囲において種々の変形実施が可
能である。例えば、チョークコイルを構成するボビンや
コアなどは、本実施例に限らず様々な形状のものを適用
できる。また、本発明はコモンモードチョークコイルに
限定されることなく、パルス状の高電圧が印加されるあ
らゆるチョークコイルに適用される。
The present invention is not limited to the above embodiments, but various modifications can be made within the scope of the gist of the present invention. For example, bobbins and cores forming the choke coil are not limited to the present embodiment, and various shapes can be applied. Further, the present invention is not limited to the common mode choke coil, but is applied to any choke coil to which a pulsed high voltage is applied.

【0021】[0021]

【発明の効果】請求項1に記載のチョークコイルは、絶
縁被覆された巻線をボビンに巻装してなるチョークコイ
ルにおいて、前記巻線の巻始め部および巻終り部に被覆
のない露出部を各々形成するとともに、前記各露出部を
係止する突起を該露出部間が放電可能となる位置に前記
ボビンと一体形成したものであり、プリント基板などの
別部材を一切用いずに、簡単な構成で高電圧による異音
の発生や巻線間のショートを防ぐことが可能となる。
The choke coil according to the first aspect is a choke coil in which a winding coated with insulation is wound around a bobbin, and an exposed portion where the winding start portion and the winding end portion of the choke coil are not covered. And the protrusions for locking the exposed portions are integrally formed with the bobbin at positions where discharge can be performed between the exposed portions, without using any separate member such as a printed circuit board. With such a configuration, it is possible to prevent generation of abnormal noise due to high voltage and short circuit between windings.

【0022】請求項2に記載のチョークコイルは、請求
項1記載の構成に加えて、前記突起を複数形成して前記
各露出部を選択的に係止するように構成したものであ
り、プリント基板などの別部材を一切用いずに、簡単な
構成で高電圧による異音の発生や巻線間のショートを防
ぐことが可能となるとともに、放電電圧の異なる様々な
耐圧のチョークコイルを設計的に簡単に得ることができ
る。
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the choke coil is configured such that a plurality of the projections are formed and the exposed portions are selectively locked. It is possible to prevent abnormal noise due to high voltage and short-circuit between windings with a simple structure without using any other member such as a board, and to design choke coils with various withstand voltages with different discharge voltages. Easy to get to.

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

【図1】本発明の一実施例を示すチョークコイルの底面
図である。
FIG. 1 is a bottom view of a choke coil showing an embodiment of the present invention.

【図2】同上チョークコイルの正面図であるる。FIG. 2 is a front view of the above choke coil.

【図3】フィルタ回路にコモンモードチョークコイルを
有する電源装置の一例を示す回路構成図である。
FIG. 3 is a circuit configuration diagram showing an example of a power supply device having a common mode choke coil in a filter circuit.

【符号の説明】[Explanation of symbols]

21 ボビン 24 第1の巻線(巻線) 25 第2の巻線(巻線) 31 巻始め部 32 巻終り部 33,34 露出部 29a,29b,29c,29d 突起 21 bobbin 24 first winding (winding) 25 second winding (winding) 31 winding start portion 32 winding end portion 33, 34 exposed portion 29a, 29b, 29c, 29d protrusion

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 絶縁被覆された巻線をボビンに巻装して
なるチョークコイルにおいて、前記巻線の巻始め部およ
び巻終り部に被覆のない露出部を各々形成するととも
に、前記各露出部を係止する突起を該露出部間が放電可
能となる位置に前記ボビンと一体形成したことを特徴と
するチョークコイル。
1. A choke coil comprising a bobbin wound with an insulatingly coated winding, and an uncovered exposed portion is formed at each of a winding start portion and a winding end portion of the winding, and each exposed portion is formed. A choke coil, characterized in that a protrusion for locking is formed integrally with the bobbin at a position where discharge can be made between the exposed portions.
【請求項2】 前記突起を複数形成して前記各露出部を
選択的に係止するように構成したことを特徴とする請求
項1記載のチョークコイル。
2. The choke coil according to claim 1, wherein a plurality of the protrusions are formed to selectively lock the exposed portions.
JP12849195A 1995-05-26 1995-05-26 Choke coil Withdrawn JPH08321426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12849195A JPH08321426A (en) 1995-05-26 1995-05-26 Choke coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12849195A JPH08321426A (en) 1995-05-26 1995-05-26 Choke coil

Publications (1)

Publication Number Publication Date
JPH08321426A true JPH08321426A (en) 1996-12-03

Family

ID=14986071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12849195A Withdrawn JPH08321426A (en) 1995-05-26 1995-05-26 Choke coil

Country Status (1)

Country Link
JP (1) JPH08321426A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018148080A (en) * 2017-03-07 2018-09-20 株式会社村田製作所 Coil component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018148080A (en) * 2017-03-07 2018-09-20 株式会社村田製作所 Coil component

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