JP2005190937A - Ignition coil for internal combustion engine - Google Patents

Ignition coil for internal combustion engine Download PDF

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JP2005190937A
JP2005190937A JP2003433821A JP2003433821A JP2005190937A JP 2005190937 A JP2005190937 A JP 2005190937A JP 2003433821 A JP2003433821 A JP 2003433821A JP 2003433821 A JP2003433821 A JP 2003433821A JP 2005190937 A JP2005190937 A JP 2005190937A
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internal combustion
joint portion
combustion engine
corrugation
ignition coil
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JP3996122B2 (en
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Hiromi Ide
博巳 井出
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Hanshin Electric Co Ltd
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Hanshin Electric Co Ltd
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  • Spark Plugs (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate insertion of an ignition plug into a joint portion, by forming it with projections and depressions on the side of the joint portion having elasticity. <P>SOLUTION: The joint portion covering part of the ignition plug of an ignition coil for an internal combustion engine is provided with corrugation in an inner surface of an insertion hole for inserting an insulator portion of the ignition plug. Appropriate friction is generated by the insulator portion and the corrugation of the inner surface of the insertion hole of the joint portion. The joint portion has a structure such that the friction allows easy insertion of the ignition plug. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、自動車エンジン等の内燃機関の火花プラグにおいて、火花放電を発生させるために高電圧を供給する内燃機関用点火コイルに関するものである。特に、本発明は、内燃機関用点火コイルにおける点火プラグの一部を覆うジョイント部の構造に関するものである。   The present invention relates to an ignition coil for an internal combustion engine that supplies a high voltage to generate a spark discharge in a spark plug of an internal combustion engine such as an automobile engine. In particular, the present invention relates to a structure of a joint portion that covers a part of an ignition plug in an ignition coil for an internal combustion engine.

図３は従来例における内燃機関用点火コイルのジョイント部を説明するための図である。図３において、点火プラグ３１は、点火部３１５、碍子部３１３、および前記碍子部３１３に設けられた複数の環状凸起部３１４から少なくとも構成されている。また、点火プラグ３１の碍子部３１３は、ジョイント部３２によって覆われている。前記点火プラグ３１とジョイント部３２とは、碍子部３１３に設けられた複数の環状凸起部３１４により、適当な摩擦によって固定されている。   FIG. 3 is a view for explaining a joint portion of an ignition coil for an internal combustion engine in a conventional example. In FIG. 3, the ignition plug 31 includes at least an ignition part 315, an insulator part 313, and a plurality of annular protruding parts 314 provided on the insulator part 313. Further, the insulator portion 313 of the spark plug 31 is covered by the joint portion 32. The spark plug 31 and the joint portion 32 are fixed by appropriate friction by a plurality of annular protruding portions 314 provided in the insulator portion 313.

その他、従来例における内燃機関用点火コイルのジョイント部は、たとえば、特開２０００−３２９０４７に示されているように、点火コイルのプラグホールへの装着を容易にし、組み付け性を向上させている。また、特開２００３−１３８３１に示す内燃機関用点火コイルのジョイント部は、前記ジョイント部内に水を侵入させない構造にしている。   In addition, the joint portion of the ignition coil for the internal combustion engine in the conventional example facilitates the mounting of the ignition coil to the plug hole and improves the assemblability as disclosed in, for example, Japanese Patent Laid-Open No. 2000-329047. Moreover, the joint part of the ignition coil for internal combustion engines shown in JP2003-13831 has a structure that prevents water from entering the joint part.

特開２０００−３２９０４７JP 2000-329047 A 特開２００３−０１３８３１JP 2003-013831 A

図３に示すように、点火プラグ３１の碍子部３１３には、複数の環状凸起部３１４が設けられている。そして、前記碍子部３１３は、ジョイント部３２の内部に挿入される。しかし、近年の点火プラグは、細径化が進んできた。前記碍子部３１３の凸起部が小さくなると、この部分のジョイント部３２内における摩擦が大きくなり、点火プラグ３１をジョイント部３２に挿入することが困難になってきた。   As shown in FIG. 3, the lever portion 313 of the spark plug 31 is provided with a plurality of annular protruding portions 314. The lever part 313 is inserted into the joint part 32. However, the diameter of spark plugs in recent years has progressed. When the protruding portion of the lever portion 313 is reduced, the friction in the joint portion 32 at this portion increases, and it becomes difficult to insert the spark plug 31 into the joint portion 32.

本発明は、以上のような課題を解決するためのものであり、弾力のあるジョイント部側に凹凸を作製することにより、点火プラグをジョイント部内に挿入し易いようにした内燃機関用点火コイルを提供することを目的とする。   An object of the present invention is to solve the above-described problems. An ignition coil for an internal combustion engine in which a spark plug is easily inserted into a joint portion by forming irregularities on the elastic joint portion side. The purpose is to provide.

（第１発明）
第１発明の内燃機関用点火コイルは、ボビンに巻回されている一次コイルおよび二次コイルと、前記一次コイルおよび二次コイルを磁気的に結合させる鉄心と、前記一次コイルおよび二次コイルと前記鉄心とを収納するケースと、前記ケースに連設されているとともに、コルゲーションを備えていない点火プラグと、点火プラグの一部を覆うジョイント部とから構成されており、前記ジョイント部の内周面にコルゲーションを備えていることを特徴とする。 (First invention)
An ignition coil for an internal combustion engine according to a first invention includes a primary coil and a secondary coil wound around a bobbin, an iron core that magnetically couples the primary coil and the secondary coil, and the primary coil and the secondary coil. The case includes: a case that houses the iron core; a spark plug that is connected to the case and does not include corrugation; and a joint portion that covers a portion of the spark plug, and the inner periphery of the joint portion It is characterized by having corrugation on the surface.

（第２発明）
第２発明の内燃機関用点火コイルにおけるジョイント部内部に設けられたコルゲーションの形状は、少なくとも一つの環状からなる凹凸であることを特徴とする。 (Second invention)
The shape of the corrugation provided in the joint portion in the ignition coil for an internal combustion engine according to the second aspect of the invention is at least one ring-shaped unevenness.

（第３発明）
第３発明の内燃機関用点火コイルにおけるジョイント部内部に設けられたコルゲーションの形状は、少なくとも一つの螺旋からなる凹凸であることを特徴とする。 (Third invention)
The shape of the corrugation provided in the joint portion of the ignition coil for an internal combustion engine according to the third aspect of the invention is an unevenness formed of at least one spiral.

（第４発明）
第４発明の内燃機関用点火コイルにおけるジョイント部内部に設けられたコルゲーションの形状は、少なくとも一つの波形からなることを特徴とする。 (Fourth invention)
The shape of the corrugation provided in the joint portion in the ignition coil for an internal combustion engine according to the fourth aspect of the invention is characterized by comprising at least one waveform.

（第５発明）
第５発明の内燃機関用点火コイルにおけるジョイント部内部に設けられたコルゲーションの形状は、少なくとも一つの凸起からなることを特徴とする。 (Fifth invention)
The shape of the corrugation provided in the joint portion in the ignition coil for an internal combustion engine of the fifth invention is characterized by comprising at least one protrusion.

本発明によれば、弾性があり自由度の高いジョイント部側にコルゲーションを設けることで、点火プラグの挿入時に摩擦が少なく、引き抜く際に適度の摩擦がある内燃機関用点火コイルの点火プラグを得ることができるようになった。   According to the present invention, an ignition plug for an ignition coil for an internal combustion engine is obtained by providing corrugation on the joint portion side having elasticity and high degree of freedom so that there is little friction when the ignition plug is inserted and there is moderate friction when the ignition plug is pulled out. I was able to do it.

（第１発明）
第１発明の内燃機関用点火コイルは、ボビンに巻回されている一次コイルおよび二次コイルと、前記一次コイルおよび二次コイルを磁気的に結合させる鉄心と、前記一次コイルおよび二次コイルと前記各鉄心とを収納するケースと、前記ケースに連設されているとともに、コルゲーションを備えていない点火プラグと、点火プラグの一部を覆うジョイント部とから少なくとも構成されている。 (First invention)
An ignition coil for an internal combustion engine according to a first invention includes a primary coil and a secondary coil wound around a bobbin, an iron core that magnetically couples the primary coil and the secondary coil, and the primary coil and the secondary coil. The case includes at least a case that accommodates the iron cores, a spark plug that is connected to the case and does not include corrugation, and a joint that covers a portion of the spark plug.

前記ジョイント部は、その内周面にコルゲーションを備えていることにより、コルゲーションを備えていない点火プラグとジョイント部の内周面のコルゲーションとが適度の摩擦を発生する。前記ジョイント部は、前記摩擦により、点火プラグが入り易くなっている。   Since the joint portion has corrugation on the inner peripheral surface thereof, the spark plug not having corrugation and the corrugation on the inner peripheral surface of the joint portion generate moderate friction. The joint portion is easily fitted with a spark plug by the friction.

（第２発明）
第２発明におけるコルゲーションの形状は、少なくとも一つの環状からなる凹凸である。前記少なくとも一つの環状凹凸は、ジョイント部の弾性に逆らって点火プラグを押し込む際にある程度の摩擦となる。 (Second invention)
The shape of the corrugation in the second aspect of the invention is at least one ring-shaped unevenness. The at least one annular unevenness causes a certain amount of friction when the spark plug is pushed in against the elasticity of the joint portion.

（第３発明）
第３発明におけるコルゲーションの形状は、少なくとも一つの螺旋からなる凹凸である。前記少なくとも一つの螺旋状凹凸は、ジョイント部を回転させながら押し込むのに適している。 (Third invention)
The shape of the corrugation in the third invention is a concavo-convex formed of at least one spiral. The at least one spiral irregularity is suitable for being pushed in while rotating the joint portion.

（第４発明）
第４発明におけるコルゲーションの形状は、少なくとも一つの波形からなり、波の高い部分と低い部分から構成される。前記波形の周期、高さ、または、形状は、任意である。 (Fourth invention)
The shape of the corrugation in the fourth invention is composed of at least one waveform, and is composed of a high part and a low part of the wave. The period, height, or shape of the waveform is arbitrary.

（第５発明）
第５発明におけるコルゲーションの形状は、少なくとも一つの凸起からなり、点火プラグを押し込む際に、摩擦が少なくなる形状であれば、任意の形状とすることができる。 (Fifth invention)
The shape of the corrugation according to the fifth aspect of the present invention can be any shape as long as it has at least one protrusion and reduces friction when the spark plug is pushed in.

図１は本発明の一実施例である内燃機関用点火コイルの点火プラグの一部を覆うジョイント部を説明するための斜視図である。図２は本発明の一実施例である内燃機関用点火コイルの点火プラグの一部を覆うジョイント部の内部を説明するための図である。図１および図２において、点火プラグ１１は、点火部１２１と、碍子部１２３とから少なくとも構成されている。   FIG. 1 is a perspective view for explaining a joint portion covering a part of a spark plug of an ignition coil for an internal combustion engine according to an embodiment of the present invention. FIG. 2 is a view for explaining the inside of a joint portion that covers a part of a spark plug of an ignition coil for an internal combustion engine according to an embodiment of the present invention. 1 and 2, the spark plug 11 includes at least an ignition part 121 and a lever part 123.

碍子部１２３は、点火プラグ１１を細径化するために、環状の凹凸が削除されて、平らな円柱面から構成されている。一方、ジョイント部１２は、図２に示すように、前記碍子部１２３が挿入される挿入孔１３が内部に成形されている。前記挿入孔１３は、一部に環状の凹部１４と、前記凹部１４に連設される環状の凸部１５とが少なくとも一つ設けられている。   In order to reduce the diameter of the spark plug 11, the insulator portion 123 is configured by a flat cylindrical surface from which the annular unevenness is removed. On the other hand, as shown in FIG. 2, the joint portion 12 has an insertion hole 13 into which the lever portion 123 is inserted. The insertion hole 13 is provided with at least one annular concave portion 14 and at least one annular convex portion 15 connected to the concave portion 14.

前記ジョイント部１２は、ある程度の弾性と強度を有するゴムまたはプラスチック製部材から構成されている。前記点火プラグ１１における碍子部１２３は、前記弾性を有するジョイント部１２の凹凸部１４、１５に挿入されるとともに、押圧して内部に押し込まれる。前記凹凸部１４、１５は、碍子部１２３の径によって決まる寸法からなり、点火プラグ１１を押し込み易くする。   The joint portion 12 is made of a rubber or plastic member having a certain degree of elasticity and strength. The insulator 123 in the spark plug 11 is inserted into the concavo-convex portions 14 and 15 of the joint portion 12 having elasticity, and is pressed into the inside. The concavo-convex portions 14 and 15 have dimensions determined by the diameter of the lever portion 123 and make it easier to push the spark plug 11.

前記ジョイント部１２に成形された前記凹凸部１４、１５は、図示されていない、二つの成形外型と一つの成形内型との間にゴムまたはプラスチック部材等を入れ、固化した後に、前記成形型から取り出される。   The concave and convex portions 14 and 15 formed on the joint portion 12 are molded after a rubber or plastic member or the like is inserted between two molding outer molds and one molding inner mold, which are not shown, and then solidified. Removed from the mold.

前記ジョイント部１２は、挿入孔１３の内周面にコルゲーション（ヒダや波形）を備えている。前記ジョイント部１２に成形された前記コルゲーションは、点火プラグ１１の碍子部１２３を挿入する際に適度の摩擦を発生する。前記ジョイント部１２に成形された前記コルゲーションは、前記適度の摩擦により、前記碍子部１２３が入り易い構造となっている。   The joint portion 12 includes corrugation (pleats and corrugations) on the inner peripheral surface of the insertion hole 13. The corrugation formed in the joint portion 12 generates moderate friction when the lever portion 123 of the spark plug 11 is inserted. The corrugation formed in the joint portion 12 has a structure in which the lever portion 123 can easily enter due to the moderate friction.

前記ジョイント部１２の内部には、少なくとも一つの螺旋状凹凸を成形することができる。前記複数の螺旋状凹凸は、前記ジョイント部１２を回転させながら押し込み易くなる。   At least one spiral concavo-convex shape may be formed in the joint portion 12. The plurality of spiral irregularities can be easily pushed in while rotating the joint portion 12.

前記ジョイント部１２の内部に成形されるコルゲーションの形状は、複数の波形からなり、波の高い部分と低い部分から構成される。前記ジョイント部１２の内部に成形された複数の波形は、その周期、高さ、幅等を任意に変えることで、前記ジョイント部１２と前記碍子部１２３との摩擦を変えることができる。   The shape of the corrugation formed inside the joint portion 12 is composed of a plurality of waveforms, and is composed of a high wave portion and a low wave portion. The plurality of waveforms formed inside the joint portion 12 can change the friction between the joint portion 12 and the lever portion 123 by arbitrarily changing the period, height, width, and the like.

前記ジョイント部１２の内部に成形されるコルゲーションの形状は、複数の凸起として、前記ジョイント部１２の材質によって、前記凸起の数と前記碍子部１２３との摩擦を適度にして、前記碍子部１２３を押し込む際に、摩擦が少なくなるように設けられている。前記凸起の形状は、前記ジョイント部１２の材質と碍子部１２３の材質等によって決められる。   The shape of the corrugation formed inside the joint portion 12 is a plurality of protrusions, and depending on the material of the joint portion 12, the number of protrusions and the friction between the lever portions 123 are moderated, and the lever portions It is provided so that friction is reduced when 123 is pushed in. The shape of the protrusion is determined by the material of the joint portion 12 and the material of the lever portion 123.

以上、本発明の実施例を詳述したが、本発明は、前記実施例に限定されるものではない。そして、本発明は、特許請求の範囲に記載された事項を逸脱することがなければ、種々の設計変更を行うことが可能である。本発明におけるジョイント部内のコルゲーションの形状は、必要に応じて、本発明の目的および効果を損なわない程度に変形することができる。また、本発明のジョイント部の材料は、公知または周知の部材を利用することができる。   As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example. The present invention can be modified in various ways without departing from the scope of the claims. The shape of the corrugation in the joint part according to the present invention can be modified as needed without impairing the object and effect of the present invention. Moreover, a well-known or well-known member can be utilized for the material of the joint part of this invention.

本発明の一実施例である内燃機関用点火コイルの点火プラグの一部を覆うジョイント部を説明するための斜視図である。（実施例１）It is a perspective view for demonstrating the joint part which covers a part of ignition plug of the ignition coil for internal combustion engines which is one Example of this invention. (Example 1) 図２は本発明の一実施例である内燃機関用点火コイルの点火プラグの一部を覆うジョイント部の内部を説明するための図である。FIG. 2 is a view for explaining the inside of a joint portion that covers a part of a spark plug of an ignition coil for an internal combustion engine according to an embodiment of the present invention. 従来例における内燃機関用点火コイルのジョイント部を説明するための図である。It is a figure for demonstrating the joint part of the ignition coil for internal combustion engines in a prior art example.

符号の説明Explanation of symbols

１１・・・点火プラグ
１２・・・ジョイント部
１２１・・・点火部
１２３・・・碍子部
１３・・・挿入孔
１４・・・凹部
１５・・・凸部 DESCRIPTION OF SYMBOLS 11 ... Spark plug 12 ... Joint part 121 ... Ignition part 123 ... Insulator part 13 ... Insertion hole 14 ... Concave part 15 ... Convex part

Claims (5)

ボビンに巻回されている一次コイルおよび二次コイルと、
前記一次コイルおよび二次コイルを磁気的に結合させる鉄心と、
前記一次コイルおよび二次コイルと前記鉄心とを収納するケースと、
前記ケースに連設されているとともに、コルゲーションを備えていない点火プラグと、
点火プラグの一部を覆うジョイント部と、
から構成される内燃機関用点火コイルにおいて、
前記ジョイント部の内周面にコルゲーションを備えていることを特徴とする内燃機関用点火コイル。 A primary coil and a secondary coil wound around a bobbin;
An iron core for magnetically coupling the primary coil and the secondary coil;
A case for housing the primary and secondary coils and the iron core;
A spark plug that is connected to the case and does not have corrugation;
A joint that covers part of the spark plug;
In an internal combustion engine ignition coil comprising:
An ignition coil for an internal combustion engine, wherein corrugation is provided on an inner peripheral surface of the joint portion. 前記コルゲーションの形状は、少なくとも一つの環状からなる凹凸であることを特徴とする請求項１に記載された内燃機関用点火コイル。   2. The ignition coil for an internal combustion engine according to claim 1, wherein the corrugation has at least one ring-shaped unevenness. 前記コルゲーションの形状は、少なくとも一つの螺旋からなる凹凸であることを特徴とする請求項１に記載された内燃機関用点火コイル。   The ignition coil for an internal combustion engine according to claim 1, wherein the corrugation has an uneven shape including at least one spiral. 前記コルゲーションは、少なくとも一つの波形からなることを特徴とする請求項１に記載された内燃機関用点火コイル。   The ignition coil for an internal combustion engine according to claim 1, wherein the corrugation includes at least one waveform. 前記コルゲーションは、少なくとも一つの凸起からなることを特徴とする請求項１に記載された内燃機関用点火コイル。   The ignition coil for an internal combustion engine according to claim 1, wherein the corrugation includes at least one protrusion.
JP2003433821A 2003-12-26 2003-12-26 Ignition coil for internal combustion engine Expired - Fee Related JP3996122B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7441553B2 (en) 2006-06-01 2008-10-28 Denso Corporation Ignition coil, mounting structure, and method for mounting of the same
US10305258B2 (en) 2015-04-08 2019-05-28 Denso Corporation Ignition coil for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7441553B2 (en) 2006-06-01 2008-10-28 Denso Corporation Ignition coil, mounting structure, and method for mounting of the same
US10305258B2 (en) 2015-04-08 2019-05-28 Denso Corporation Ignition coil for internal combustion engine

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