JP4701633B2 - Ignition coil for internal combustion engine and method for manufacturing the same - Google Patents

Ignition coil for internal combustion engine and method for manufacturing the same Download PDF

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JP4701633B2
JP4701633B2 JP2004155731A JP2004155731A JP4701633B2 JP 4701633 B2 JP4701633 B2 JP 4701633B2 JP 2004155731 A JP2004155731 A JP 2004155731A JP 2004155731 A JP2004155731 A JP 2004155731A JP 4701633 B2 JP4701633 B2 JP 4701633B2
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bobbin
iron core
primary
ground terminal
coil
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JP2005340419A (en
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正幸 杉山
修 五十嵐
琢麿 鮎沢
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Mahle Electric Drive Systems Co Ltd
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Kokusan Denki Co Ltd
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Description

本発明は、アース端子の一端がボビンの内周に配置されて鉄心に電気的に接触されている構造の内燃機関用点火コイル及びその製造方法に関するものである。 The present invention relates to an ignition coil for an internal combustion engine having a structure in which one end of a ground terminal is disposed on the inner periphery of a bobbin and is in electrical contact with an iron core, and a method for manufacturing the same.

従来のこの種の内燃機関用点火コイルの製造方法は、図８乃至図１１に示すようにして行われていた。図８（Ａ）は鉄心の側面図、図８（Ｂ）はアース端子の一端を曲げていないボビンとこれに巻かれたコイルの縦断面図、図９（Ａ）（Ｂ）は図８（Ｂ）に示すコイル巻装ボビンで、アース端子の一端を曲げる方向を示す縦断面図及びその右側面図、図１０は鉄心にコイル巻装ボビンを嵌める過程を示す縦断面図、図１１は鉄心の所定位置にコイル巻装ボビンを嵌めた状態を示す縦断面図である。   A conventional method for manufacturing this type of ignition coil for an internal combustion engine has been performed as shown in FIGS. 8A is a side view of the iron core, FIG. 8B is a longitudinal sectional view of a bobbin in which one end of the ground terminal is not bent and a coil wound around the bobbin, and FIGS. 9A and 9B are FIG. FIG. 10B is a longitudinal sectional view showing a direction in which one end of the ground terminal is bent and a right side view thereof, FIG. 10 is a longitudinal sectional view showing a process of fitting the coil winding bobbin on the iron core, and FIG. It is a longitudinal cross-sectional view which shows the state which fitted the coil winding bobbin in the predetermined position.

従来の内燃機関用点火コイルの製造は、図８（Ａ）に示す積層されたＵ字状の鉄心１と、図８（Ｂ）に示す樹脂製の１次ボビン２に１次コイル３が巻装されたものを用いて行う。１次ボビン２は、筒状の胴部２ａの両端に鍔部２ｂが突設された構造になっている。   A conventional ignition coil for an internal combustion engine is manufactured by winding a primary coil 3 around a laminated U-shaped iron core 1 shown in FIG. 8A and a resin-made primary bobbin 2 shown in FIG. 8B. We will use the ones that are equipped. The primary bobbin 2 has a structure in which flanges 2b project from both ends of a cylindrical body 2a.

このような１次ボビン２には、図８（Ｂ）及び図９（Ａ）（Ｂ）に示すように、一方の端部である鍔部２ｂ側に板状のアース端子４の中間部が支持されている。該アース端子４の一端である先端部４ａは、図９（Ａ）に示すように、１次ボビン２の軸心方向に折り曲げた後、図１０に示すように胴部２ａの内周に接するように折り返す。該アース端子４の他端である基端部４ｂは、１次ボビン２の径方向の外側に直交する向きで突出されている。   As shown in FIGS. 8B and 9A and 9B, the primary bobbin 2 has an intermediate portion of the plate-like ground terminal 4 on the side of the flange portion 2b, which is one end portion. It is supported. The tip 4a, which is one end of the ground terminal 4, is bent in the axial direction of the primary bobbin 2 as shown in FIG. 9A, and then contacts the inner periphery of the trunk 2a as shown in FIG. Wrap like so. A base end portion 4 b which is the other end of the ground terminal 4 protrudes in a direction orthogonal to the outer side in the radial direction of the primary bobbin 2.

かかる状態で、図１０に示すように折り返したアース端子４の一端の先端部４ａ側で、１次コイル３を巻装した１次ボビン２の胴部２ａを鉄心１の脚部１ａに嵌め、該アース端子４の先端部４ａを脚部１ａに接触させながら該脚部１ａに沿って移動させる。   In such a state, the body portion 2a of the primary bobbin 2 around which the primary coil 3 is wound is fitted to the leg portion 1a of the iron core 1 on the tip portion 4a side of one end of the ground terminal 4 folded as shown in FIG. The tip 4a of the ground terminal 4 is moved along the leg 1a while contacting the leg 1a.

１次コイル３を巻装した１次ボビン２は、図１１に示すように、脚部１ａにおける１次ボビン２の位置決め箇所まで移動させる。   As shown in FIG. 11, the primary bobbin 2 wound with the primary coil 3 is moved to a position where the primary bobbin 2 is positioned in the leg 1a.

この場合、鉄心１の抜け止めと、アース端子４の先端部４ａと鉄心１１との電気的接触とを確実に図るため、１次ボビン２の胴部２ａの孔の寸法を鉄心１の脚部１ａの寸法より小さくして、樹脂成型品である１次ボビン２の胴部２ａを削りながら圧入していた。 In this case, the size of the hole of the body portion 2a of the primary bobbin 2 is set to the leg portion of the iron core 1 in order to ensure the retaining of the iron core 1 and the electrical contact between the tip portion 4a of the ground terminal 4 and the iron core 11. and smaller than the dimension of the 1a, was pressed while scraping body 2a of a resin molding primary bobbin 2.

この後、１次ボビン２を巻装した１次ボビン２の外周には、図示しないが２次コイルを巻装した２次ボビンを嵌めて取り付ける。   Thereafter, a secondary bobbin around which a secondary coil is wound is fitted and attached to the outer periphery of the primary bobbin 2 around which the primary bobbin 2 is wound.

このようにして内燃機関用点火コイルの製造を行っていた。
特開昭６０−２３３３７３号公報（図２） In this way, an ignition coil for an internal combustion engine has been manufactured.
JP-A-60-233373 (FIG. 2)

しかしながら、こような従来の内燃機関用点火コイルの製造方法では、アース端子４の一端の折り返した先端部４ａが鉄心１の脚部１ａに接触して１次ボビン２が相対的に圧入される距離が長く、アース端子４の折り返した先端部４ａにかかるエネルギーが大きいため該先端部４ａが折れたり、鉄心１の脚部１ａで樹脂成型品である１次ボビン２の胴部２ａが削られるため、１次ボビン２の削り屑が出る問題点があった。   However, in such a conventional method for manufacturing an ignition coil for an internal combustion engine, the folded end portion 4a of one end of the ground terminal 4 contacts the leg portion 1a of the iron core 1, and the primary bobbin 2 is relatively press-fitted. Since the distance is long and the energy applied to the folded tip portion 4a of the ground terminal 4 is large, the tip portion 4a is bent or the body portion 2a of the primary bobbin 2 that is a resin molded product is scraped by the leg portion 1a of the iron core 1. Therefore, there is a problem that shavings of the primary bobbin 2 are generated.

本発明の目的は、ボビンの胴部の内周に存在するアース端子の一端に、ボビンまたは鉄心のいずれか一方をスライドさせての嵌め込み時にスライド抵抗がかからず、しかも嵌め込み終了状態では鉄心に対するアース端子の接触を十分に行わせることができる内燃機関用点火コイル及びその製造方法を提供することにある。   The object of the present invention is that no sliding resistance is applied when one of the bobbin and the iron core is slid into one end of the ground terminal existing on the inner periphery of the body of the bobbin, and when the fitting is finished, An object of the present invention is to provide an ignition coil for an internal combustion engine and a method for manufacturing the same that can sufficiently contact a ground terminal.

本発明は、鉄心に嵌められたボビンにコイルが巻装され、前記ボビンの端部側に支持されたアース端子の一端が前記ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記ボビンの外周に突出されて、該アース端子の他端に前記コイルの一端が電気的に接続されている内燃機関用点火コイルを対象とする。 In the present invention, a coil is wound around a bobbin fitted to an iron core, and one end of a ground terminal supported on the end side of the bobbin is disposed on the inner periphery of the bobbin to be electrically contacted with the iron core, the earth and the other end of the pin protrudes on the outer circumference of said bobbin, one end of the other end to the coil of the ground terminal is directed to a ignition coils are electrically connected.

本発明に係る内燃機関用点火コイルでは、前記ボビンの内周に配置されている前記アース端子の一端が前記ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記ボビンの端子収納凹部に収納され、前記鉄心には前記ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられている。また鉄心の位置決め箇所に嵌っているボビンは、前記鉄心の凸部とは反対側の端部に係止突起を有し、このボビンの係止突起が鉄心の係止溝に嵌って係止されている。 The ignition coil according to the present invention, is positioned so as to be disposed at a position where one end of the ground terminal disposed on the inner periphery of the bobbin spaced outwardly of the inner peripheral surface than the radial direction of the bobbin The bobbin is housed in a terminal housing recess, and the iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end of the bobbin positioning portion . The bobbin fitted in the positioning position of the iron core has a locking projection at the end opposite to the convex portion of the iron core, and the locking projection of the bobbin is fitted into the locking groove of the iron core and locked. ing.

また本発明は、鉄心に嵌められたボビンにコイルが巻装され、前記ボビンの端部側に支持されたアース端子の一端が前記ボビンの端部で折り返されることにより前記ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記ボビンの外周に突出されて、該アース端子の他端に前記コイルの一端が電気的に接続されている内燃機関用点火コイルを対象とする。 In the present invention, a coil is wound around a bobbin fitted to an iron core, and one end of a ground terminal supported on the end part side of the bobbin is folded back at the end part of the bobbin so as to be arranged on the inner periphery of the bobbin. which is electrically in contact with the iron core is, the other end of the ground terminal is protruded on an outer periphery of the bobbin, ignition internal combustion engine to which one end of the coil to the other end of the grounding terminal is electrically connected Intended for coils.

本発明に係る内燃機関用点火コイルでは、前記ボビンの内周に配置されている前記アース端子の一端は前記ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記ボビンの端子収納凹部に収納され、前記鉄心には前記ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられている。この場合も、鉄心の位置決め箇所に嵌っている前記ボビンは、鉄心の前記凸部とは反対側の端部に係止突起を有し、このボビンの係止突起が、前記鉄心の係止溝に嵌って係止されている。 In the ignition coil for an internal combustion engine according to the present invention, one end of the ground terminal disposed on the inner periphery of the bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the bobbin. The bobbin is housed in a terminal housing recess, and the iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end of the bobbin positioning portion. Also in this case, the bobbin fitted in the positioning position of the iron core has a locking projection at the end opposite to the convex portion of the core, and the locking projection of the bobbin is a locking groove of the core. Is fitted and locked.

また本発明は、鉄心に嵌められた１次ボビンに１次コイルが巻装され、前記１次ボビンの端部側に支持されたアース端子の一端が前記１次ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記１次ボビンの外周に突出されて、該アース端子の他端に前記１次コイルの一端が電気的に接続され、前記１次コイルの外周に２次ボビンが嵌められて、該２次ボビンに２次コイルが巻装されている内燃機関用点火コイルを対象とする。 Further, according to the present invention, a primary coil is wound around a primary bobbin fitted to an iron core, and one end of a ground terminal supported on the end side of the primary bobbin is disposed on the inner periphery of the primary bobbin. is in electrical contact with the core, the earth and the other end of the pin protrudes on the outer circumference of the primary bobbin, one end of the primary coil is electrically connected to the other end of the grounding terminal, the primary and the secondary bobbin fitted on an outer periphery of the coil, target ignition coil the secondary coil to the secondary bobbin is wound.

本発明に係る内燃機関用点火コイルでは、前記１次ボビンの内周に配置されている前記アース端子の一端は前記１次ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記１次ボビンの端子収納凹部に収納され、鉄心には前記１次ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられている。この場合も、鉄心の位置決め箇所に嵌っている前記１次ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、この１次ボビンの係止突起は、前記鉄心の係止溝に嵌って係止されている。 In the ignition coil for an internal combustion engine according to the present invention, one end of the ground terminal disposed on the inner periphery of the primary bobbin is disposed at a position spaced outward in the radial direction from the inner peripheral surface of the primary bobbin. The iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end portion of the primary bobbin positioning portion. Also in this case, the primary bobbin fitted to the positioning position of the iron core has a locking projection on the end of the iron core opposite to the convex portion, and the locking projection of the primary bobbin It is fitted and locked in the locking groove of the iron core.

さらに本発明は、鉄心に嵌められた１次ボビンに１次コイルが巻装され、前記１次ボビンの端部側に支持されたアース端子の一端が前記１次ボビンの端部で折り返されることにより前記１次ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記１次ボビンの外周に突出されて、該アース端子の他端に前記１次コイルの一端が電気的に接続され、前記１次コイルの外周に２次ボビンが嵌められて、該２次ボビンに２次コイルが巻装されている内燃機関用点火コイルを対象とする。 Further, according to the present invention, a primary coil is wound around a primary bobbin fitted to an iron core, and one end of the ground terminal supported on the end side of the primary bobbin is folded back at the end of the primary bobbin. wherein disposed on the inner periphery of the primary bobbin is electrically in contact with the core, the earth and the other end of the pin protrudes on the outer circumference of the primary bobbin, said primary coil to the other end of the ground terminal by one end of are electrically connected, and the secondary bobbin fitted on an outer periphery of said primary coil, target ignition coil the secondary coil to the secondary bobbin is wound.

本発明に係る内燃機関用点火コイルでは、前記１次ボビンの内周に配置されている前記アース端子の一端が前記１次ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記１次ボビンの端子収納凹部に収納され、前記鉄心には前記１次ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられている。鉄心の位置決め箇所に嵌っている前記１次ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、この１次ボビンの前記係止突起は、前記鉄心の係止溝に嵌って係止されている。 In the ignition coil for an internal combustion engine according to the present invention, one end of the ground terminal disposed on the inner periphery of the primary bobbin is disposed at a position spaced radially outward from the inner peripheral surface of the primary bobbin. The iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end portion of the positioning position of the primary bobbin. . The primary bobbin fitted in the positioning position of the iron core has a locking projection at the end of the iron core opposite to the convex portion, and the locking projection of the primary bobbin is related to the engagement of the iron core. It fits in the stop groove and is locked.

本発明に係る内燃機関用点火コイルでは、ボビンの内周に配置されているアース端子の一端または折り返し部分をボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めしてボビンの端子収納凹部に収納したので、該ボビンを鉄心に嵌めていずれか一方をスライドさせてボビンを鉄心の位置決め箇所に位置決めする際に、ボビンに支持されたアース端子の一端または折り返し部分が鉄心に接触しないようにすることができる。そのため、スライド時にアース端子の一端または折り返し部分に摩擦抵抗がかかることがなく、アース端子の一端または折り返し部分が折れたり、樹脂成型品であるボビンが鉄心により削られたりするのを防止することができ、ボビンの削り屑が出るのを防止することができる。 In the ignition coil for an internal combustion engine according to the present invention, one end or the folded portion of the ground terminal disposed on the inner periphery of the bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the bobbin. since housed in the terminal housing recess of the bobbin Te, the bobbin by sliding either one is fitted to the iron core in positioning the bobbin positioning portion of the iron core, one end or folded portion of the ground terminal carried by the bobbin It is possible to prevent contact with the iron core . Therefore, there is no frictional resistance applied to one end or the folded portion of the ground terminal during sliding, and it is possible to prevent the one end or the folded portion of the ground terminal from being broken and the bobbin being a resin molded product from being scraped by the iron core. It is possible to prevent bobbin shavings from coming out.

また、鉄心にはボビンの位置決め箇所の端部に対応してアース端子の一端または折り返し部分に接触する凸部が設けられているので、嵌め込み終了状態では鉄心とアース端子との接触を十分に行わせることができる。 Further, since the iron core projecting portion is provided in contact with one end or folded portion of the ground terminal in response to the end of the positioning portion of the bobbin, perform sufficient contact between the iron core and the earth terminal in the fitting completion state Can be made.

本発明においてはまた、鉄心の位置決め箇所に嵌っているボビンが、鉄心の凸部とは反対側の端部に係止突起を有し、ボビンのこの係止突起が鉄心の係止溝に嵌って係止されているので、ボビンと鉄心との相対移動を防止して、アース端子の一端または折り返し部と鉄心の凸部とが離間するのを防止することができ、アース端子の一端または折り返し部と鉄心の凸部との電気的接触状態の安定化を図ることができる。 In the present invention, the bobbin fitted in the positioning position of the iron core has a locking projection on the end opposite to the convex portion of the core, and the locking projection of the bobbin is fitted in the locking groove of the core. since the locked Te, to prevent relative movement between the bobbin and the iron core, it is possible to prevent the the convex portion of the one or the folded portion and the core of the ground terminal is spaced apart, one or wrapping ground terminal stabilization of electrical contact between the convex portion of the parts and the core can be achieved.

以下、本発明に係る内燃機関用点火コイル及びその製造方法を実施するための最良の形態の第１例を図１（Ａ）（Ｂ）乃至図５を参照して詳細に説明する。図１（Ａ）は鉄心の側面図、図１（Ｂ）はアース端子の一端を曲げていないボビンとこれに巻かれたコイルの縦断面図、図２（Ａ）（Ｂ）は図１（Ｂ）に示すコイル巻装ボビンで、アース端子の一端を曲げる方向を示す縦断面図及びその右側面図、図３は鉄心にコイル巻装ボビンを嵌める過程を示す縦断面図、図４は鉄心の所定位置にコイル巻装ボビンを嵌めた状態を示す縦断面図、図５は図４における要部拡大図である。   Hereinafter, a first example of the best mode for carrying out an ignition coil for an internal combustion engine and a method for manufacturing the same according to the present invention will be described in detail with reference to FIGS. 1A is a side view of an iron core, FIG. 1B is a longitudinal sectional view of a bobbin in which one end of a ground terminal is not bent and a coil wound around the bobbin, and FIGS. 2A and 2B are FIG. FIG. 3B is a longitudinal sectional view showing a direction in which one end of the ground terminal is bent and a right side view thereof, FIG. 3 is a longitudinal sectional view showing a process of fitting the coil winding bobbin on the iron core, and FIG. Fig. 5 is a longitudinal sectional view showing a state where the coil winding bobbin is fitted at a predetermined position, and Fig. 5 is an enlarged view of a main part in Fig. 4.

これらの図を用いて内燃機関用点火コイルの構造を、その製造方法と共に説明する。   The structure of the ignition coil for an internal combustion engine will be described together with its manufacturing method using these drawings.

本例の内燃機関用点火コイルの製造は、図１（Ａ）に示す積層されたＵ字状の鉄心１と、図１（Ｂ）に示す樹脂製の１次ボビン２に１次コイル３が巻装されたものを用いて行う。   The ignition coil for the internal combustion engine of this example is manufactured by arranging the primary coil 3 on the laminated U-shaped iron core 1 shown in FIG. 1A and the resin-made primary bobbin 2 shown in FIG. This is done using a wound one.

１次ボビン２は、筒状の胴部２ａの両端に鍔部２ｂが突設された構造になっている。このような１次ボビン２の内周に配置されているアース端子４の一端である先端部４ａは、１次ボビン２の内周面より径方向の外側に離間させるように位置決めされて該１次ボビン２の端子収納凹部５に収納されている。即ち、予め１次ボビン２の一端部側の内周の一部に端子収納凹部５を設けておき、かかる状態で、アース端子４の一端の先端部４ａを、図２（Ａ）に示すように、１次ボビン２の軸心方向に折り曲げた後、図３に示すように胴部２ａの内周に折り返し、端子収納凹部５に収納する。端子収納凹部５のボビン径方向の深さは、アース端子４の一端の先端部４ａをこの端子収納凹部５に収容した状態で、図３に示すようにアース端子４の先端部４ａが１次ボビン２の内周面より径方向の外側に離間される深さとなっている。アース端子４の他端の基端部４ｂは、１次ボビン２の径方向の外側に直交する向きで突出されている。   The primary bobbin 2 has a structure in which flanges 2b project from both ends of a cylindrical body 2a. The tip 4a, which is one end of the ground terminal 4 arranged on the inner periphery of the primary bobbin 2, is positioned so as to be spaced radially outward from the inner peripheral surface of the primary bobbin 2. The next bobbin 2 is housed in the terminal housing recess 5. That is, a terminal housing recess 5 is provided in advance on a part of the inner periphery of the primary bobbin 2 at one end, and in this state, the tip 4a at one end of the ground terminal 4 is as shown in FIG. Then, after being bent in the axial direction of the primary bobbin 2, it is folded back to the inner periphery of the body 2a as shown in FIG. The depth of the bobbin radial direction of the terminal housing recess 5 is such that the tip 4a of the ground terminal 4 is primary when the tip 4a at one end of the ground terminal 4 is housed in this terminal housing 5 as shown in FIG. The depth of the bobbin 2 is spaced from the inner peripheral surface to the outside in the radial direction. The base end portion 4 b at the other end of the ground terminal 4 protrudes in a direction orthogonal to the outside in the radial direction of the primary bobbin 2.

鉄心１の脚部１ａには、１次ボビン２の位置決め箇所の端部に対応してアース端子４の一端の折り返した先端部４ａに接触する凸部６が設けられている。本例の凸部６は、鉄心１の脚部１ａにおいて、１次ボビン２を位置決めする位置より先の鉄心１の脚部１ａの径方向寸法を大きくして形成されている。この場合、１次ボビン２を相対的にスライドさせる脚部１ａの径方向寸法は、１次ボビン２の胴部２ａを該部１ａに嵌めて相対的に移動させ得る寸法になっている。   The leg portion 1a of the iron core 1 is provided with a convex portion 6 that contacts the folded end portion 4a of one end of the ground terminal 4 corresponding to the end portion of the positioning position of the primary bobbin 2. The convex part 6 of this example is formed by increasing the radial dimension of the leg part 1 a of the iron core 1 ahead of the position where the primary bobbin 2 is positioned in the leg part 1 a of the iron core 1. In this case, the radial dimension of the leg portion 1a that relatively slides the primary bobbin 2 is such that the trunk portion 2a of the primary bobbin 2 can be fitted to the portion 1a and moved relatively.

鉄心１の脚部１ａの位置決め箇所に嵌っている１次ボビン２は、該鉄心１の凸部６とは反対側の端部に係止突起７を有している。鉄心１の脚部１ａのボビン位置決め箇所の下側には、係止突起７が嵌り込む係止溝８が設けられている。   The primary bobbin 2 fitted in the positioning portion of the leg portion 1 a of the iron core 1 has a locking projection 7 at the end opposite to the convex portion 6 of the iron core 1. A locking groove 8 into which the locking projection 7 is fitted is provided below the bobbin positioning portion of the leg portion 1a of the iron core 1.

かかる状態で、図３に示すように折り返したアース端子４の先端部４ａ側で、１次コイル３を巻装した１次ボビン２の胴部２ａを鉄心１の脚部１ａに嵌め、１次ボビン２を鉄心１の脚部１ａに対して相対的に移動させる。   In this state, the body portion 2a of the primary bobbin 2 around which the primary coil 3 is wound is fitted to the leg portion 1a of the iron core 1 on the side of the tip portion 4a of the ground terminal 4 folded as shown in FIG. The bobbin 2 is moved relative to the leg 1a of the iron core 1.

１次コイル３を巻装した１次ボビン２は、図４に示すように、脚部１ａにおける１次ボビン２の位置決め箇所まで移動させる。１次ボビン２が脚部１ａの位置決め箇所に達すると、アース端子４の一端の折り返された先端部４ａは鉄心１の脚部１ａにおける凸部６に接触する。   As shown in FIG. 4, the primary bobbin 2 wound with the primary coil 3 is moved to a position where the primary bobbin 2 is positioned in the leg 1a. When the primary bobbin 2 reaches the positioning position of the leg portion 1 a, the folded end portion 4 a of one end of the ground terminal 4 comes into contact with the convex portion 6 in the leg portion 1 a of the iron core 1.

この状態では、図４及び図５に示すように、鉄心１の脚部１ａにおける凸部６とは反対側で１次ボビン２の端部に係止突起７が、脚部１ａの係止溝８に嵌り込む。このため、１次コイル３を巻装した１次ボビン２が脚部１ａの位置決め箇所に位置決め状態になると、１次ボビン２は脚部１ａに対して相対的に移動できないようにロックされる。   In this state, as shown in FIGS. 4 and 5, the locking projection 7 is formed on the end of the primary bobbin 2 on the side opposite to the convex portion 6 of the leg 1 a of the iron core 1, and the locking groove of the leg 1 a. 8 fits. For this reason, when the primary bobbin 2 around which the primary coil 3 is wound is positioned at the position where the leg 1a is positioned, the primary bobbin 2 is locked so that it cannot move relative to the leg 1a.

この後、１次ボビン２を巻装した１次ボビン２の外周には、図示しないが２次コイルを巻装した２次ボビンを嵌めて取り付ける。   Thereafter, a secondary bobbin around which a secondary coil is wound is fitted and attached to the outer periphery of the primary bobbin 2 around which the primary bobbin 2 is wound.

このようにして内燃機関用点火コイルの製造を行う。   In this way, the ignition coil for the internal combustion engine is manufactured.

本例の内燃機関用点火コイルでは、１次ボビン２の内周に配置しているアース端子４の一端の折り返し部分である先端部４ａを１次ボビン２の胴部２ａの内周面より径方向の外側に離間させるように位置決めして１次ボビン２の端子収納凹部５に収納しているので、該１次ボビン２の胴部２ａを鉄心１に嵌めていずれか一方をスライドさせて１次ボビン２を鉄心１の脚部１ａにおける位置決め箇所に位置決めする際には、１次ボビン２に支持されたアース端子４の一端の折り返し部分である先端部４ａは鉄心１の脚部１ａに接触していず、このためスライド時にアース端子４の一端の折り返し部分である先端部４ａに摩擦抵抗がかからず、アース端子４の一端の折り返し部分である先端部４ａが折れたり、鉄心１の脚部１ａで樹脂成型品である１次ボビン２の胴部２ａが削られるのを防止でき、１次ボビン２の削り屑が出るのを防止することができる。   In the ignition coil for the internal combustion engine of this example, the tip portion 4a which is a folded portion of one end of the ground terminal 4 arranged on the inner periphery of the primary bobbin 2 has a diameter from the inner peripheral surface of the trunk portion 2a of the primary bobbin 2. Since it is positioned so as to be separated from the outside in the direction and is accommodated in the terminal accommodating recess 5 of the primary bobbin 2, the body 2a of the primary bobbin 2 is fitted into the iron core 1 and one of them is slid to 1 When positioning the secondary bobbin 2 at the positioning position on the leg 1 a of the iron core 1, the tip 4 a that is a folded portion of one end of the ground terminal 4 supported by the primary bobbin 2 contacts the leg 1 a of the iron core 1. Therefore, at the time of sliding, the tip portion 4a which is a folded portion of one end of the ground terminal 4 is not subjected to frictional resistance, and the tip portion 4a which is the folded portion of one end of the ground terminal 4 is broken, or the leg of the iron core 1 is broken. Part 1a is a resin molded product It prevents the body 2a of the primary bobbin 2 is cut, it is possible to prevent the shavings of the primary bobbin 2 exits.

また、鉄心１の脚部１ａには１次ボビン２の位置決め箇所の端部に対応してアース端子４の一端の折り返し部分である先端部４ａに接触する凸部６が設けられているので、嵌め込み終了状態では鉄心１に対するアース端子４の接触を十分に行わせることができる。   Moreover, since the leg part 1a of the iron core 1 is provided with the convex part 6 which contacts the front-end | tip part 4a which is the folding | turning part of the end of the ground terminal 4 corresponding to the edge part of the positioning location of the primary bobbin 2, In the fitted end state, the contact of the ground terminal 4 with the iron core 1 can be sufficiently performed.

この場合、鉄心１の脚部１ａの位置決め箇所に嵌っている１次ボビン２が、鉄心１の脚部１ａの凸部６とは反対側の端部に係止突起７を有し、１次ボビン２のこの係止突起７が鉄心１の脚部１ａの係止溝８に嵌って係止されているので、１次ボビン２と鉄心１との相対移動が防止され、アース端子４の一端の折り返し部分である先端部４ａと鉄心１の脚部１ａの凸部６との離間が防止され、アース端子４の一端折り返し部分である先端部４ａと鉄心１の脚部１ａの凸部６との電気的接触状態を安定化させることができる。   In this case, the primary bobbin 2 fitted in the positioning portion of the leg portion 1a of the iron core 1 has a locking projection 7 at the end opposite to the convex portion 6 of the leg portion 1a of the iron core 1. Since this locking projection 7 of the bobbin 2 is fitted and locked in the locking groove 8 of the leg 1 a of the iron core 1, relative movement between the primary bobbin 2 and the iron core 1 is prevented, and one end of the ground terminal 4 is prevented. The tip portion 4a, which is a folded portion of the iron core 1, is prevented from being separated from the convex portion 6 of the leg portion 1a of the iron core 1, and the tip portion 4a, which is a one-end folded portion of the ground terminal 4, and the convex portion 6 of the leg portion 1a of the iron core 1 The electrical contact state can be stabilized.

また、本例の内燃機関用点火コイルの製造方法では、１次ボビン２の内周に配置しているアース端子４の一端の折り返し部分である先端部４ａを１次ボビン２の胴部２ａの内周面より径方向の外側に離間させるように位置決めして１次ボビン２の端子収納凹部５に収納しているので、該１次ボビン２の胴部２ａを鉄心１に嵌めていずれか一方をスライドさせて１次ボビン２を鉄心１の脚部１ａにおける位置決め箇所に位置決めする際には、１次ボビン２に支持されたアース端子４の一端の折り返し部分である先端部４ａは鉄心１の脚部１ａに接触していず、このためスライド時にアース端子４の一端の折り返し部分である先端部４ａに摩擦抵抗がかからず、アース端子４の一端の折り返し部分である先端部４ａが折れたり、鉄心１の脚部１ａで樹脂成型品である１次ボビン２の胴部２ａが削られるのを防止でき、１次ボビン２の削り屑が出るのを防止することができる。   Further, in the method for manufacturing an ignition coil for an internal combustion engine according to the present example, the tip end portion 4 a that is a folded portion of one end of the ground terminal 4 disposed on the inner periphery of the primary bobbin 2 is connected to the body portion 2 a of the primary bobbin 2. Since the terminal bobbin 2 is positioned so as to be spaced apart from the inner peripheral surface in the radial direction and is housed in the terminal housing recess 5, either the body portion 2 a of the primary bobbin 2 is fitted to the iron core 1. When the primary bobbin 2 is positioned at the positioning position on the leg portion 1a of the iron core 1 by sliding the end of the iron core 1, the tip end portion 4a that is a folded portion of one end of the ground terminal 4 supported by the primary bobbin 2 is Since it is not in contact with the leg portion 1a, a frictional resistance is not applied to the tip portion 4a which is a folded portion of one end of the ground terminal 4 during sliding, and the tip portion 4a which is a folded portion of one end of the ground terminal 4 is broken. , Leg 1a of iron core 1 It prevents the body 2a of a resin molding primary bobbin 2 is cut, it is possible to prevent the shavings of the primary bobbin 2 exits.

また、鉄心１の脚部１ａには１次ボビン２の位置決め箇所の端部に対応してアース端子４の一端の折り返し部分である先端部４ａに接触する凸部６が設けられているので、嵌め込み終了状態では鉄心１に対するアース端子４の接触を十分に行わせることができる。   Moreover, since the leg part 1a of the iron core 1 is provided with the convex part 6 which contacts the front-end | tip part 4a which is the folding | turning part of the end of the ground terminal 4 corresponding to the edge part of the positioning location of the primary bobbin 2, In the fitted end state, the contact of the ground terminal 4 with the iron core 1 can be sufficiently performed.

図６は本発明に係る内燃機関用点火コイルの第２例の縦断面図を示したものである。なお、本例は第１例と対応する部分には、同一符号を付けて示している。   FIG. 6 shows a longitudinal sectional view of a second example of the ignition coil for an internal combustion engine according to the present invention. In this example, parts corresponding to those in the first example are denoted by the same reference numerals.

本例の内燃機関用点火コイルでは、鉄心１としてＩ字形のものが用いられている。この鉄心１には、１次ボビン２の位置決め箇所の端部に対応して設けられている凸部６が、この部分でのみ径方向の外側に突出するように設けられている。その他の構成は、第１例と同様になっている。   In the ignition coil for an internal combustion engine of this example, an I-shaped one is used as the iron core 1. The iron core 1 is provided with a convex portion 6 provided corresponding to the end portion of the positioning portion of the primary bobbin 2 so as to protrude outward in the radial direction only at this portion. Other configurations are the same as in the first example.

このような構成でも、第１例と同様の効果を得ることができる。   Even with such a configuration, the same effect as in the first example can be obtained.

図７は本発明に係る内燃機関用点火コイルの第３例の縦断面図を示したものである。なお、本例は第１例と対応する部分には、同一符号を付けて示している。   FIG. 7 is a longitudinal sectional view of a third example of the ignition coil for an internal combustion engine according to the present invention. In this example, parts corresponding to those in the first example are denoted by the same reference numerals.

本例の内燃機関用点火コイルでは、鉄心１としてＥ字形のものが用いられている。このＥ字形の鉄心１の中央の脚部１ａに、第１例と同様に１次ボビン２の胴部２ａが嵌められ、第１例と同様な構成になっている。   In the ignition coil for an internal combustion engine of this example, an E-shaped one is used as the iron core 1. The body portion 2a of the primary bobbin 2 is fitted to the center leg portion 1a of the E-shaped iron core 1 in the same manner as in the first example, and has the same configuration as in the first example.

このような構成でも、第１例と同様の効果を得ることができる。   Even with such a configuration, the same effect as in the first example can be obtained.

上記例では、アース端子４の一端の先端部４ａを折り返して１次ボビン２の胴部２ａの内周側の端子収納凹部５に収納したが、該アース端子４の一端の先端部４ａは折り返えさずに鍔部２ｂを貫通して端子収納凹部５に、１次ボビン２の胴部２ａの内周面より径方向の外側に離間させるように位置決めして収納してもよい。   In the above example, the tip 4a at one end of the ground terminal 4 is folded and stored in the terminal storage recess 5 on the inner peripheral side of the body 2a of the primary bobbin 2, but the tip 4a at one end of the ground terminal 4 is folded. Instead of returning, it may be positioned and stored in the terminal storing recess 5 through the flange portion 2b so as to be separated from the inner peripheral surface of the body portion 2a of the primary bobbin 2 in the radial direction.

（Ａ）は本発明に係る内燃機関用点火コイル及びその製造方法を実施するための最良の形態の第１例における鉄心の側面図、（Ｂ）はアース端子の一端を曲げていないボビンとこれに巻かれたコイルの縦断面図である。(A) is a side view of the iron core in the first example of the best mode for carrying out the ignition coil for an internal combustion engine and the manufacturing method thereof according to the present invention, (B) is a bobbin in which one end of the ground terminal is not bent, and this It is a longitudinal cross-sectional view of the coil wound around. （Ａ）（Ｂ）は図１（Ｂ）に示すコイル巻装ボビンで、アース端子の一端を曲げる方向を示す縦断面図及びその右側面図である。(A) (B) is the coil winding bobbin shown to FIG. 1 (B), The longitudinal cross-sectional view which shows the direction which bends the end of an earth terminal, and its right view. 本例で鉄心にコイル巻装ボビンを嵌める過程を示す縦断面図である。It is a longitudinal cross-sectional view which shows the process of fitting a coil winding bobbin to an iron core in this example. 本例で鉄心の所定位置にコイル巻装ボビンを嵌めた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the coil winding bobbin in the predetermined position of the iron core in this example. 図４における要部拡大図である。It is a principal part enlarged view in FIG. 本発明に係る内燃機関用点火コイルの第２例の縦断面図である。It is a longitudinal cross-sectional view of the 2nd example of the ignition coil for internal combustion engines which concerns on this invention. 本発明に係る内燃機関用点火コイルの第３例の縦断面図である。It is a longitudinal cross-sectional view of the 3rd example of the ignition coil for internal combustion engines which concerns on this invention. （Ａ）は従来の内燃機関用点火コイルの製造方法で用いる鉄心の側面図、（Ｂ）はアース端子の一端を曲げていないボビンとこれに巻かれたコイルの縦断面図である。(A) is a side view of an iron core used in a conventional method for manufacturing an ignition coil for an internal combustion engine, and (B) is a longitudinal sectional view of a bobbin in which one end of a ground terminal is not bent and a coil wound around the bobbin. （Ａ）（Ｂ）は図８（Ｂ）に示すコイル巻装ボビンで、アース端子の一端を曲げる方向を示す縦断面図及びその右側面図である。(A) (B) is the coil winding bobbin shown to FIG. 8 (B), and is the longitudinal cross-sectional view which shows the direction which bends the end of a ground terminal, and its right view. 従来例の鉄心にコイル巻装ボビンを嵌める過程を示す縦断面図である。It is a longitudinal cross-sectional view which shows the process of fitting a coil winding bobbin in the iron core of a prior art example. 従来例の鉄心の所定位置にコイル巻装ボビンを嵌めた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the coil winding bobbin in the predetermined position of the iron core of a prior art example.

１ 鉄心
１ａ 脚部
２ １次ボビン
２ａ 胴部
２ｂ 鍔部
３ １次コイル
４ アース端子
４ａ アース端子の一端である先端部
４ｂ アース端子の他端である基端部
５ 端子収納凹部
６ 凸部
７ 係止突起
８ 係止溝 DESCRIPTION OF SYMBOLS 1 Iron core 1a Leg part 2 Primary bobbin 2a trunk | drum 2b collar part 3 Primary coil 4 Ground terminal 4a The front-end | tip part which is one end of an earth terminal 4b The base end which is the other end of an earth terminal Locking protrusion 8 Locking groove

Claims (4)

鉄心に嵌められたボビンにコイルが巻装され、前記ボビンの端部側に支持されたアース端子の一端が前記ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記ボビンの外周に突出されて、該アース端子の他端に前記コイルの一端が電気的に接続されている内燃機関用点火コイルにおいて、
前記ボビンの内周に配置されている前記アース端子の一端は、前記ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記ボビンに設けられた端子収納凹部に収納され、
前記鉄心には前記ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられ、
前記鉄心の位置決め箇所に嵌っている前記ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、
前記ボビンの前記係止突起は、前記鉄心の係止溝に嵌って係止されていること、
を特徴とする内燃機関用点火コイル。 A coil is wound around a bobbin fitted to the iron core, and one end of a ground terminal supported on the end side of the bobbin is disposed on the inner periphery of the bobbin to be in electrical contact with the iron core. the other end protrudes to the outer periphery of the bobbin, the ignition coil for an internal combustion engine to which one end of the coil to the other end of the grounding terminal is electrically connected,
One end of the ground terminal disposed on the inner periphery of the bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the bobbin , and a terminal storage recess provided on the bobbin Stored in
The iron core is provided with a convex portion that contacts one end of the grounding terminal corresponding to the end of the positioning portion of the bobbin ,
The bobbin fitted in the positioning position of the iron core has a locking projection at the end opposite to the convex portion of the iron core,
The locking projection of the bobbin is locked by being fitted into a locking groove of the iron core;
An ignition coil for an internal combustion engine. 鉄心に嵌められたボビンにコイルが巻装され、前記ボビンの端部側に支持されたアース端子の一端が前記ボビンの端部で折り返されることにより前記ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記ボビンの外周に突出されて、該アース端子の他端に前記コイルの一端が電気的に接続されている内燃機関用点火コイルにおいて、
前記ボビンの内周に配置されている前記アース端子の一端は、前記ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記ボビンの端子収納凹部に収納され、
前記鉄心には前記ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられ、
前記鉄心の位置決め箇所に嵌っている前記ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、
前記ボビンの前記係止突起は、前記鉄心の係止溝に嵌って係止されていること、
を特徴とする内燃機関用点火コイル。 A coil is wound around a bobbin fitted to the iron core, and one end of the ground terminal supported on the end side of the bobbin is folded at the end of the bobbin so that it is disposed on the inner periphery of the bobbin and is attached to the iron core. are in electrical contact, the other end of the ground terminal is protruded on the outer periphery of the bobbin, one end of the coil to the other end of the ground terminal is in the ignition coil for an internal combustion engine are electrically connected,
One end of the ground terminal disposed on the inner periphery of the bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the bobbin, and is stored in the terminal storage recess of the bobbin. ,
The iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end of the bobbin positioning portion ,
The bobbin fitted in the positioning position of the iron core has a locking projection at the end opposite to the convex portion of the iron core,
The locking projection of the bobbin is locked by being fitted into a locking groove of the iron core;
An ignition coil for an internal combustion engine. 鉄心に嵌められた１次ボビンに１次コイルが巻装され、前記１次ボビンの端部側に支持されたアース端子の一端が前記１次ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記１次ボビンの外周に突出されて、該アース端子の他端に前記１次コイルの一端が電気的に接続され、前記１次コイルの外周に２次ボビンが嵌められて、該２次ボビンに２次コイルが巻装されている内燃機関用点火コイルにおいて、
前記１次ボビンの内周に配置されている前記アース端子の一端は前記１次ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記１次ボビンの端子収納凹部に収納され、
前記鉄心には前記１次ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられ、
前記鉄心の位置決め箇所に嵌っている前記１次ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、
前記１次ボビンの前記係止突起は、前記鉄心の係止溝に嵌って係止されていること、
を特徴とする内燃機関用点火コイル。 A primary coil is wound around a primary bobbin fitted to an iron core, and one end of a ground terminal supported on the end side of the primary bobbin is disposed on the inner periphery of the primary bobbin to electrically connect to the iron core. The other end of the ground terminal protrudes from the outer periphery of the primary bobbin, one end of the primary coil is electrically connected to the other end of the ground terminal, and 2 is connected to the outer periphery of the primary coil. In an internal combustion engine ignition coil in which a secondary bobbin is fitted and a secondary coil is wound around the secondary bobbin,
One end of the ground terminal disposed on the inner periphery of the primary bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the primary bobbin, and the terminal of the primary bobbin Stored in the storage recess,
The iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end portion of the positioning position of the primary bobbin,
The primary bobbin that is fitted in the positioning location of the iron core has a locking projection at an end opposite to the convex portion of the iron core,
The locking projection of the primary bobbin is fitted and locked in a locking groove of the iron core;
An ignition coil for an internal combustion engine. 鉄心に嵌められた１次ボビンに１次コイルが巻装され、前記１次ボビンの端部側に支持されたアース端子の一端が前記１次ボビンの端部で折り返されることにより前記１次ボビンの内周に配置されて前記鉄心に電気的に接触され、前記アース端子の他端が前記１次ボビンの外周に突出されて、該アース端子の他端に前記１次コイルの一端が電気的に接続され、前記１次コイルの外周に２次ボビンが嵌められて、該２次ボビンに２次コイルが巻装されている内燃機関用点火コイルにおいて、
前記１次ボビンの内周に配置されている前記アース端子の一端は前記１次ボビンの内周面より径方向の外側に離間した位置に配置されるように位置決めされて前記１次ボビンの端子収納凹部に収納され、
前記鉄心には前記１次ボビンの位置決め箇所の端部に対応して前記アース端子の一端に接触する凸部が設けられ、
前記鉄心の位置決め箇所に嵌っている前記１次ボビンは、前記鉄心の前記凸部とは反対側の端部に係止突起を有し、
前記１次ボビンの前記係止突起は前記鉄心の係止溝に嵌って係止されていること、
を特徴とする内燃機関用点火コイル。
A primary coil is wound around a primary bobbin fitted to an iron core, and one end of a ground terminal supported on the end side of the primary bobbin is folded back at the end of the primary bobbin, whereby the primary bobbin The other end of the ground terminal protrudes from the outer periphery of the primary bobbin, and one end of the primary coil is electrically connected to the other end of the ground terminal. An internal combustion engine ignition coil in which a secondary bobbin is fitted on the outer periphery of the primary coil, and the secondary coil is wound around the secondary bobbin;
One end of the ground terminal disposed on the inner periphery of the primary bobbin is positioned so as to be disposed at a position spaced radially outward from the inner peripheral surface of the primary bobbin, and the terminal of the primary bobbin Stored in the storage recess,
The iron core is provided with a convex portion that contacts one end of the ground terminal corresponding to the end portion of the positioning position of the primary bobbin,
The primary bobbin that is fitted in the positioning location of the iron core has a locking projection at an end opposite to the convex portion of the iron core,
The locking projections of the primary bobbin are fitted and locked in the locking grooves of the iron core;
An ignition coil for an internal combustion engine.
JP2004155731A 2004-05-26 2004-05-26 Ignition coil for internal combustion engine and method for manufacturing the same Expired - Lifetime JP4701633B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993314U (en) * 1972-12-06 1974-08-13
JPS6380833U (en) * 1986-11-17 1988-05-27
JPH0354227A (en) * 1989-07-24 1991-03-08 Asahi Chem Ind Co Ltd Powdered or granular para-orienting aromatic polyamide
JPH08306557A (en) * 1995-05-08 1996-11-22 Mitsubishi Electric Corp Igniter for internal combustion engine

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Publication number Priority date Publication date Assignee Title
JPS6450419A (en) * 1987-08-20 1989-02-27 Nec Corp Manufacture of complementary mos semiconductor device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993314U (en) * 1972-12-06 1974-08-13
JPS6380833U (en) * 1986-11-17 1988-05-27
JPH0354227A (en) * 1989-07-24 1991-03-08 Asahi Chem Ind Co Ltd Powdered or granular para-orienting aromatic polyamide
JPH08306557A (en) * 1995-05-08 1996-11-22 Mitsubishi Electric Corp Igniter for internal combustion engine

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