JP2019125728A - Ignition coil and connecting method of high voltage cord to ignition coil - Google Patents

Ignition coil and connecting method of high voltage cord to ignition coil Download PDF

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JP2019125728A
JP2019125728A JP2018006155A JP2018006155A JP2019125728A JP 2019125728 A JP2019125728 A JP 2019125728A JP 2018006155 A JP2018006155 A JP 2018006155A JP 2018006155 A JP2018006155 A JP 2018006155A JP 2019125728 A JP2019125728 A JP 2019125728A
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cylindrical portion
high voltage
cord
voltage cord
ignition coil
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JP7094618B2 (en
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匠 高澤
Takumi Takazawa
匠 高澤
大保 米林
Hiroyasu Yonebayashi
大保 米林
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RB Controls Co Ltd
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RB Controls Co Ltd
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Abstract

To provide a problem in which, in a prior art for preventing a high pressure cord from coming off from a cylindrical portion, a part of the cylindrical portion is plastically deformed, but at that time, because the portion is plastically deformed without heating, internal stress remains in the plastically-deformed portion, and the plastically-deformed portion is likely to restore the original state due to aging, and therefore, the restraining force of the high pressure cord with respect to the cylindrical portion is reduced, and there is a possibility that the high pressure cord may drop out of the cylindrical portion.SOLUTION: A cylindrical portion is provided with a cut-out portion cut in half from the opening side of the cylindrical portion to a predetermined depth, and the high pressure cord is inserted, and a pressing piece is welded to the cut-out portion of the cylindrical portion to complete the cylindrical shape by fitting the high pressure cord to the cut-cit portion in an insertion of the high pressure cord, and the high pressure cord is fixed to the cylindrical portion by sandwiching the high pressure cord with the inner circumferential surface of the cylindrical portion and the inner circumferential surface of the pressing piece.SELECTED DRAWING: Figure 2

Description

本発明は、例えばガスバーナの近傍に設けられた点火プラグに高圧電力を供給する高圧コードを、高圧電力を発生させる点火コイルに接続する接続方法、および高圧コードが接続された点火コイルに関する。   The present invention relates to, for example, a connection method of connecting a high voltage cord supplying high voltage power to an ignition plug provided in the vicinity of a gas burner to an ignition coil generating high voltage power, and an ignition coil connected with the high voltage cord.

上述のような点火コイルでは、樹脂製のケーシングを備えており、そのケーシングには円筒部が設けられている。そしてその円筒部内には円筒部の中心部分に金属製の出力端子が設けられている。点火プラグなどにこの点火コイルからの高圧電力を供給する高圧コードは、この円筒部に差し込まれると、高圧コードの芯線に出力端子が突き刺さって、高圧コードの芯線と出力端子とが電気的に接続される。   The above-described ignition coil is provided with a resin-made casing, and the casing is provided with a cylindrical portion. In the cylindrical portion, a metal output terminal is provided at the central portion of the cylindrical portion. When a high voltage cord for supplying high voltage power from the ignition coil to a spark plug or the like is inserted into this cylindrical portion, the output terminal pierces the core of the high voltage cord, and the core of the high voltage cord and the output terminal are electrically connected. Be done.

ただし、そのままでは、高圧コードに対して円筒部から引き抜く方向の力が作用すると、高圧コードは容易に円筒部から抜け出てしまう。このため、従来は接着剤を用いて円筒部と高圧コード等を接着していたが、接着剤を硬化させるのに長時間を有し、生産性を損なうため、円筒部に高圧コードを差し込んだ状態で円筒部の側面に外力を作用させて塑性変形させ、円筒部の一部を高圧コードの被覆に食い込ませていた（例えば、特許文献１参照）。   However, if a force in the direction of pulling out of the cylindrical portion acts on the high pressure cord as it is, the high pressure cord will easily slip out of the cylindrical portion. For this reason, conventionally, the cylindrical part and the high pressure cord and the like were adhered using an adhesive, but it took a long time to cure the adhesive and the high pressure cord was inserted into the cylindrical part to impair productivity. In the state, an external force is applied to the side surface of the cylindrical portion to cause plastic deformation, and a part of the cylindrical portion is bitten into the coating of the high voltage cord (see, for example, Patent Document 1).

特開２００４−１７２５１０号公報（図２）Unexamined-Japanese-Patent No. 2004-172510 (FIG. 2)

上記従来のものでは、円筒部の一部を塑性変形させる際に、その塑性変形させる部分を加熱することなく塑性変形させているので、塑性変形させた部分に内部応力が残留し、経年変化によって、塑性変形させた部分が元の状態に復元しようとする。すると、円筒部に対する高圧コードの拘束力が低下し、円筒部から高圧コードが脱落してしまうおそれが生じる。   In the above-mentioned prior art, when plastically deforming a part of the cylindrical portion, plastic deformation is performed without heating the plastically deformed portion, so internal stress remains in the plastically deformed portion, and aged deterioration occurs , The plastically deformed part tries to restore to the original state. Then, the restraining force of the high pressure cord with respect to the cylindrical portion is reduced, which may cause the high pressure cord to drop out of the cylindrical portion.

そこで本発明は、上記の問題点に鑑み、経年変化によっても、高圧コードが円筒部から脱落するおそれのない点火コイルおよびその点火コイルに対して高圧コードを接続する方法を提供することを課題とする。   Therefore, in view of the above problems, it is an object of the present invention to provide an ignition coil in which the high voltage cord is not likely to be detached from the cylindrical portion even with age, and a method of connecting the high voltage cord to the ignition coil. Do.

上記課題を解決するために本発明による点火コイルは、樹脂製のケーシングを有し、このケーシングに高圧コードが挿入される円筒部が設けられ、この円筒部内に設けた出力端子と高圧コードの芯線とが電気的に接続された状態で高圧コードが円筒部に固定された点火コイルにおいて、上記円筒部は、円筒部の開口側から所定の深さまで半割りされた切り欠き部と、その切り欠き部に合わさって円筒部形状を完成させる押さえ片とから構成されており、上記高圧コードは上記押さえ片が上記円筒部の切り欠き部に溶着されることによって円筒部に固定されることを特徴とする。   In order to solve the above problems, an ignition coil according to the present invention has a casing made of resin, and a cylindrical portion into which a high pressure cord is inserted is provided in this casing, and an output terminal provided in this cylindrical portion and a core wire of the high pressure cord. In the ignition coil in which the high voltage cord is fixed to the cylindrical part in a state that the electric parts are electrically connected, the cylindrical part is a notched part that is half-cut from the opening side of the cylindrical part to a predetermined depth And a pressing piece for completing the shape of the cylindrical portion according to the portion, and the high-pressure cord is fixed to the cylindrical portion by welding the pressing piece to the notch portion of the cylindrical portion. Do.

上記構成では、円筒部の一部を変形させるのではなく、押さえ片で高圧コードを挟み込むので、高圧コードを固定する部分に内部応力が残留しないので、経年変化によっても、高圧コードに対する固定力が低下することがない。   In the above configuration, since the high pressure cord is held by the pressing piece instead of deforming a part of the cylindrical part, internal stress does not remain in the part to which the high pressure cord is fixed. There is no decline.

なお、上記高圧コードを挿入しない状態で円筒部の切り欠き部に押さえ片を合わせた状態での円筒部内の形状が、押さえ片の合わせ方向が短辺となる略楕円形であり、その楕円形の短辺の長さが上記高圧コードの直径より短く設定されることが望ましい。   The shape of the cylindrical portion in a state in which the pressing piece is aligned with the notch portion of the cylindrical portion without inserting the high voltage cord is a substantially elliptical shape in which the fitting direction of the pressing pieces is the short side. It is desirable that the length of the short side of is set shorter than the diameter of the high pressure cord.

さらに、上記円筒部の内周面のうち、上記切り欠き部が形成された部分および上記押さえ片の内周面のうちの少なくとも一方に、上記高圧コードの被覆に食い込んで高圧コードが円筒部から引き抜かれることを防止する食い込み突起を形成すれば、高圧コードをより強固に固定することができる。   Further, in the inner peripheral surface of the cylindrical portion, at least one of the portion where the notch portion is formed and the inner peripheral surface of the pressing piece, bites into the coating of the high voltage cord, and the high voltage cord from the cylindrical portion The high-pressure cord can be fixed more firmly by forming a bite projection that prevents it from being pulled out.

上記課題を解決するために本発明による点火コイルへの高圧コードの接続方法は、樹脂製のケーシングに形成された円筒部に設けられた出力端子と高圧コードの芯線とが電気的に接続されるように高圧コードを円筒部に挿入した状態で、高圧コードを円筒部に固定する点火コイルへの高圧コードの接続方法において、上記円筒部に、円筒部の開口側から所定の深さまで半割りされた切り欠き部を設け、高圧コードを挿入した状態で、上記切り欠き部に合わさって円筒部形状を完成させる押さえ片を上記円筒部の切り欠き部に溶着して、円筒部の内周面と押さえ片の内周面とで高圧コードを挟んで高圧コードを円筒部に固定することを特徴とする。   In order to solve the above problems, according to a method of connecting a high voltage cord to an ignition coil according to the present invention, an output terminal provided on a cylindrical portion formed in a resin casing and a core wire of the high voltage cord are electrically connected. In the method of connecting the high voltage cord to the ignition coil for fixing the high voltage cord to the cylindrical portion in a state where the high voltage cord is inserted into the cylindrical portion, the cylindrical portion is divided into halves from the opening side of the cylindrical portion to a predetermined depth In the state where the notched portion is provided and the high pressure cord is inserted, a pressing piece which is joined to the notched portion to complete the cylindrical portion shape is welded to the notched portion of the cylindrical portion, and the inner peripheral surface of the cylindrical portion The high voltage cord is fixed to the cylindrical portion with the high voltage cord interposed between the inner peripheral surface of the pressing piece and the pressing piece.

なお、上記高圧コードを挿入しない状態で円筒部の切り欠き部に押さえ片を合わせた状態での円筒部内の形状が、押さえ片の合わせ方向が短辺となる略楕円形であり、その楕円形の短辺の長さが上記高圧コードの直径より短く設定されていることが望ましい。   The shape of the cylindrical portion in a state in which the pressing piece is aligned with the notch portion of the cylindrical portion without inserting the high voltage cord is a substantially elliptical shape in which the fitting direction of the pressing pieces is the short side. It is desirable that the length of the short side of is set shorter than the diameter of the high pressure cord.

さらに、上記円筒部の内周面のうち、上記切り欠き部が形成された部分および上記押さえ片の内周面のうちの少なくとも一方に、上記高圧コードの被覆に食い込んで高圧コードが円筒部から引き抜かれることを防止する食い込み突起が形成されていることが望ましい。   Further, in the inner peripheral surface of the cylindrical portion, at least one of the portion where the notch portion is formed and the inner peripheral surface of the pressing piece, bites into the coating of the high voltage cord, and the high voltage cord from the cylindrical portion It is desirable that a bite projection be formed to prevent it from being pulled out.

以上の説明から明らかなように、本発明は、押さえ片を円筒部に溶着されることによって高圧コードを円筒部に固定するので、長期間にわたって高圧コードを円筒部に確実に保持させ続けることができる。   As apparent from the above description, according to the present invention, the high pressure cord is fixed to the cylindrical part by welding the pressing piece to the cylindrical part, so that the high pressure cord can be held securely in the cylindrical part for a long period of time it can.

円筒部に高圧コードを固定した状態を示す斜視図The perspective view which shows the state which fixed the high voltage | pressure cord to the cylindrical part 円筒部への押さえ片の溶着工程を示す断面図Sectional drawing which shows the welding process of the pressing piece to a cylindrical part 円筒部と押さえ片との形状を示す断面図Sectional drawing which shows the shape of a cylindrical part and a pressing piece 食い込み突起の形状を示す断面図Cross section showing the shape of the bite projection

図１および図２を参照して、１は点火コイルの本体であり、外側は樹脂製のケーシングで覆われている。このケーシングには出力端子を内部に備えた円筒部本体２と、外部から供給される低電圧電力の入力部である入力端子につながる入力開口部１１とが設けられている。   Referring to FIGS. 1 and 2, 1 is a main body of the ignition coil, and the outside is covered with a resin casing. The casing is provided with a cylindrical main body 2 internally provided with an output terminal, and an input opening 11 connected to an input terminal which is an input portion for low voltage power supplied from the outside.

円筒部本体２はケーシングの一部であるから、円筒部本体２は樹脂で形成されている。そのため、加熱されると溶融する。円筒部本体２には高圧コード３の挿入方向に沿って所定の深さまで半割りされた切り欠き部２２を形成し、その切り欠き部２２に合わさって円筒形状を完成させる押さえ片２１を設けた。そして、円筒部本体２に高圧コード３を挿入した後、押さえ片２１を切り欠き部２２に合わせて、その状態で対向する両方向から超音波溶着用のジグ４で円筒部本体２および押さえ片２１を挟み、押さえ片２１を円筒部本体２に対して溶着した。   Since the cylindrical portion body 2 is a part of the casing, the cylindrical portion body 2 is formed of resin. Therefore, it melts when it is heated. The cylindrical portion body 2 is formed with a notch 22 which is half-cut to a predetermined depth along the insertion direction of the high voltage cord 3 and provided with a pressing piece 21 which is joined to the notch 22 to complete the cylindrical shape. . Then, after the high voltage cord 3 is inserted into the cylindrical body 2, the holding piece 21 is aligned with the notch 22 and the cylindrical body 2 and the holding piece 21 with the jig 4 for ultrasonic welding from both directions facing in that state. And the pressing piece 21 was welded to the cylindrical body 2.

図３を参照して、切り欠き部２２の垂直面、すなわち押さえ片２１に対して対向する面には溶着用の突起２０を形成し、両突起２０が溶融することによって円筒部本体２に対して押さえ片２１が確実に溶着されるようにした。また、押さえ片２１を円筒部本体２に対して溶着した状態で、円筒部本体２と押さえ片２１の内側の距離Ｌは、自由状態での高圧コードの外径であるＲよりも短く設定した。これにより、押さえ片２１を円筒部本体２に溶着すると、高圧コード３の被覆は圧縮され、高圧コード３は強固に円筒部に対して固定されることになる。   Referring to FIG. 3, a projection 20 for welding is formed on the vertical surface of the notch 22, that is, the surface opposed to the pressing piece 21, and both projections 20 melt to form the cylindrical body 2. As a result, the pressing piece 21 is reliably welded. Further, in a state in which the pressing piece 21 is welded to the cylindrical portion body 2, the distance L between the inner portion of the cylindrical portion body 2 and the pressing piece 21 is set shorter than R which is the outer diameter of the high voltage cord in the free state. . As a result, when the pressing piece 21 is welded to the cylindrical portion main body 2, the coating of the high voltage cord 3 is compressed, and the high voltage cord 3 is firmly fixed to the cylindrical portion.

さらに、図４を参照して、円筒部本体２の内周面および押さえ片２１の内周面に、各々食い込み突起２３を形成し、押さえ片２１を円筒部本体２に溶着した状態で、これら食い込み突起２３が高圧コード３の被覆に食い込んで、さらに高圧コード３が強硬に円筒部に固定されるようにした。   Further, referring to FIG. 4, in the state in which biting projections 23 are respectively formed on the inner circumferential surface of cylindrical body 2 and the inner circumferential surface of pressure piece 21, these pressure pieces 21 are welded to cylindrical body 2. The biting projection 23 bites into the coating of the high pressure cord 3 so that the high pressure cord 3 is rigidly fixed to the cylindrical portion.

なお、本発明は上記した形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変更を加えてもかまわない。   The present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the scope of the present invention.

１ 点火コイル
２ 円筒部本体
３ 高圧コード
４ ジグ
２１ 押さえ片
２２ 切り欠き部 1 Ignition coil 2 Cylindrical part main body 3 High pressure cord 4 Jig 21 Retaining piece 22 Notched part

Claims (6)

樹脂製のケーシングを有し、このケーシングに高圧コードが挿入される円筒部が設けられ、この円筒部内に設けた出力端子と高圧コードの芯線とが電気的に接続された状態で高圧コードが円筒部に固定された点火コイルにおいて、上記円筒部は、円筒部の開口側から所定の深さまで半割りされた切り欠き部と、その切り欠き部に合わさって円筒部形状を完成させる押さえ片とから構成されており、上記高圧コードは上記押さえ片が上記円筒部の切り欠き部に溶着されることによって円筒部に固定されることを特徴とする点火コイル。   It has a casing made of resin, and this casing is provided with a cylindrical part into which the high voltage cord is inserted, and the high voltage cord is cylindrical in a state where the output terminal provided in this cylindrical part and the core wire of the high voltage cord are electrically connected. In the ignition coil fixed to the portion, the cylindrical portion is formed by a cut-out portion cut in half from the opening side of the cylindrical portion to a predetermined depth, and a pressing piece which is joined to the cut-out portion to complete the cylindrical portion shape An ignition coil characterized in that the high voltage cord is fixed to the cylindrical portion by welding the pressing piece to the notch portion of the cylindrical portion. 上記高圧コードを挿入しない状態で円筒部の切り欠き部に押さえ片を合わせた状態での円筒部内の形状が、押さえ片の合わせ方向が短辺となる略楕円形であり、その楕円形の短辺の長さが上記高圧コードの直径より短く設定されていることを特徴とする請求項１に記載の点火コイル。   The shape of the cylindrical portion in a state in which the pressing piece is aligned with the notch portion of the cylindrical portion without inserting the high voltage cord is a substantially elliptical shape in which the fitting direction of the pressing pieces is the short side. The ignition coil according to claim 1, wherein the side length is set shorter than the diameter of the high pressure cord. 上記円筒部の内周面のうち、上記切り欠き部が形成された部分および上記押さえ片の内周面のうちの少なくとも一方に、上記高圧コードの被覆に食い込んで高圧コードが円筒部から引き抜かれることを防止する食い込み突起を形成したことを特徴とする請求項１または請求項２に記載の点火コイル。   The high voltage cord is pulled out of the cylindrical portion by biting into the coating of the high voltage cord in at least one of the portion where the notch is formed and the inner peripheral surface of the pressing piece in the inner peripheral surface of the cylindrical portion The ignition coil according to claim 1 or 2, wherein a bite projection is formed to prevent that. 樹脂製のケーシングに形成された円筒部に設けられた出力端子と高圧コードの芯線とが電気的に接続されるように高圧コードを円筒部に挿入した状態で、高圧コードを円筒部に固定する点火コイルへの高圧コードの接続方法において、上記円筒部に、円筒部の開口側から所定の深さまで半割りされた切り欠き部を設け、高圧コードを挿入した状態で、上記切り欠き部に合わさって円筒部形状を完成させる押さえ片を上記円筒部の切り欠き部に溶着して、円筒部の内周面と押さえ片の内周面とで高圧コードを挟んで高圧コードを円筒部に固定することを特徴とする点火コイルへの高圧コードの接続方法。   The high voltage cord is fixed to the cylindrical portion in a state where the high voltage cord is inserted into the cylindrical portion so that the output terminal provided on the cylindrical portion formed in the resin casing and the core wire of the high voltage cord are electrically connected. In the method for connecting a high voltage cord to an ignition coil, the cylindrical portion is provided with a notch which is cut in half from the opening side of the cylindrical portion to a predetermined depth, and the high voltage cord is inserted and then joined to the notch. The pressure piece which completes the shape of the cylindrical portion is welded to the notch of the cylindrical portion, and the high voltage cord is fixed to the cylindrical portion by sandwiching the high pressure cord with the inner peripheral surface of the cylindrical portion and the inner peripheral surface of the pressure piece. A method of connecting a high voltage cord to an ignition coil, characterized in that 上記高圧コードを挿入しない状態で円筒部の切り欠き部に押さえ片を合わせた状態での円筒部内の形状が、押さえ片の合わせ方向が短辺となる略楕円形であり、その楕円形の短辺の長さが上記高圧コードの直径より短く設定されていることを特徴とする請求項４に記載の点火コイルへの高圧コードの接続方法。   The shape of the cylindrical portion in a state in which the pressing piece is aligned with the notch portion of the cylindrical portion without inserting the high voltage cord is a substantially elliptical shape in which the fitting direction of the pressing pieces is the short side. The method for connecting a high pressure cord to an ignition coil according to claim 4, wherein the side length is set shorter than the diameter of the high pressure cord. 上記円筒部の内周面のうち、上記切り欠き部が形成された部分および上記押さえ片の内周面のうちの少なくとも一方に、上記高圧コードの被覆に食い込んで高圧コードが円筒部から引き抜かれることを防止する食い込み突起が形成されていることを特徴とする請求項４または請求項５に記載の点火コイルへの高圧コードの接続方法。   The high voltage cord is pulled out of the cylindrical portion by biting into the coating of the high voltage cord in at least one of the portion where the notch is formed and the inner peripheral surface of the pressing piece in the inner peripheral surface of the cylindrical portion A method of connecting a high voltage cord to an ignition coil according to claim 4 or 5, characterized in that a bite projection is formed to prevent that.
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JPS54171796U (en) * 1978-05-24 1979-12-04
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JPH08250353A (en) * 1995-01-12 1996-09-27 Matsushita Electric Ind Co Ltd Fly-back transformer
JPH11329182A (en) * 1998-05-07 1999-11-30 Keyence Corp Case fixed with insulated conductor and fixing method for insulated conductor to case
JP3069523U (en) * 1999-12-08 2000-06-23 木谷電器株式会社 Terminal box for solar cell module

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JP2003308900A (en) 2002-04-12 2003-10-31 Rb Controls Co Ignitor
US9050084B2 (en) 2011-09-23 2015-06-09 Ethicon Endo-Surgery, Inc. Staple cartridge including collapsible deck arrangement

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JPS54171796U (en) * 1978-05-24 1979-12-04
JPS60119376A (en) * 1983-12-01 1985-06-26 Nippon Denso Co Ltd Distributor cap associated with firing cable
JPH08250353A (en) * 1995-01-12 1996-09-27 Matsushita Electric Ind Co Ltd Fly-back transformer
JPH11329182A (en) * 1998-05-07 1999-11-30 Keyence Corp Case fixed with insulated conductor and fixing method for insulated conductor to case
JP3069523U (en) * 1999-12-08 2000-06-23 木谷電器株式会社 Terminal box for solar cell module

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