EP1563520A1 - Electrical contact between thin varnished wires of the secondary winding of an ignition coil - Google Patents

Electrical contact between thin varnished wires of the secondary winding of an ignition coil

Info

Publication number
EP1563520A1
EP1563520A1 EP03762341A EP03762341A EP1563520A1 EP 1563520 A1 EP1563520 A1 EP 1563520A1 EP 03762341 A EP03762341 A EP 03762341A EP 03762341 A EP03762341 A EP 03762341A EP 1563520 A1 EP1563520 A1 EP 1563520A1
Authority
EP
European Patent Office
Prior art keywords
ignition coil
secondary winding
contact spring
contact
voltage outlet
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.)
Granted
Application number
EP03762341A
Other languages
German (de)
French (fr)
Other versions
EP1563520B1 (en
Inventor
Klaus Lerchenmueller
Konstantin Lindenthal
Thomas Breckle
Juergen Raedler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1563520A1 publication Critical patent/EP1563520A1/en
Application granted granted Critical
Publication of EP1563520B1 publication Critical patent/EP1563520B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an electrical connection arrangement for producing an ignition coil, in particular a pencil ignition coil with an ignition coil rod with a high-voltage outlet and a low-voltage outlet.
  • Ignition coils generate high voltage sparks.
  • this jumps over to its electrodes and thus ignites, for example, the uft-gasoline mixture of an internal combustion engine.
  • this spark plug is supplied with a high-voltage ignition coil.
  • a primary winding and a corresponding secondary winding are provided within the ignition coil. One end of the primary winding is coupled to an ignition starter switch, and the other end is connected to a so-called breaker.
  • the secondary winding that is to say the winding which is responsible for the generation of the ignition spark, is connected inside the ignition coil to one end of the primary winding, so that it is connected to ground.
  • the other end of the secondary winding is connected to the high-voltage outlet, which in turn is either connected to an ignition cable that leads to the spark plug or on which the spark plug is arranged directly.
  • the secondary winding itself consists of a thin wire, which is coated with a corresponding lacquer layer, in order to avoid contacting the individual wires when wrapping a specific carrier body or coil former. After the secondary windings have been wound on a carrier, the ends of the respective wires are contacted. For this purpose, thermal contacting methods are generally known, for example soldering or welding.
  • the object of the invention is to produce a connection arrangement between an ignition coil rod of an ignition coil and a secondary or primary winding which is inexpensive and easy to implement.
  • the contacting according to the invention is integrated into already existing components and that simple processes can thereby be reliably produced.
  • the "cold" contacting method proposed here has the advantage over the previous method that no additional system costs are necessary. Furthermore, assembly steps are reduced and a reduction in exclusion parts can also be recorded by the embodiment according to the invention.
  • Another important advantage of the invention is that no installation space has to be optimized to carry out the contacting. This means that there is no free space in the area of contacting e.g. must be kept for welding guns, soldering irons or the like.
  • the invention provides for a contact spring to be inserted via guide means, which slides over a nose-like element during its insertion process, so that the contact spring can initially be guided over the secondary winding without touching it.
  • contact elements On the side of the contact spring pointing towards the coil body, contact elements are provided which, during the snap process, press on the wires of the coil body provided with insulation and, by means of this snap process, cause the insulation to be broken at the corresponding contact points, so that electrical contact between the individual Wires of the bobbin and the contact spring can be produced.
  • Fig. 1 is a perspective view of an ignition coil with one side for the high voltage outlet and another side for the low voltage outlet;
  • FIG. 2 shows a sectional view through the ignition coil according to FIG. 1;
  • Fig. 3 is a perspective view of an ignition coil rod which is arranged in the ignition coil housing shown in Fig. 1;
  • Fig. 4 is a perspective view of the side of the low voltage outlet of an ignition coil
  • FIG. 5 shows a perspective view of the ignition coil rod, in particular on the side of the low-voltage outlet with a contact spring
  • FIG. 6 shows a perspective view of an enlarged illustration of the side of the low-voltage outlet of the ignition coil rod with a contact spring in the preassembly position
  • FIG. 7 shows a section through the ignition coil rod according to FIG. 5;
  • Fig. 8 is an enlarged view of the section of FIG. 7;
  • FIG. 9 shows a perspective view of the contact spring according to the invention for mounting on the side of the low-voltage outlet
  • the ignition coil 1 shows a perspective view of an ignition coil 1.
  • the ignition coil 1 comprises an ignition coil housing 2 and an ignition coil rod 3 arranged in the ignition coil housing 2. Furthermore, the ignition coil 1 has a side for a high-voltage outlet H and a side for the low-voltage outlet N.
  • the side of the low-voltage outlet N is provided in order to make contact with a power supply not shown in the drawing, the side of the high-voltage outlet H being provided for connection to an ignition cable or a spark plug (not shown in the drawing).
  • Fig. 2 the ignition coil 1 shown in Fig. 1 is shown in a sectional view; the areas shown are those which relate to the features of the invention which are essential to the invention and which are shown in more detail in the following figures.
  • FIGS. 1 and 2 shows the ignition coil rod 3, each with one side for the high-voltage outlet H and one side for the low-voltage outlet N, which can be inserted as a structural unit into the ignition coil housing 2 shown in FIGS. 1 and 2 immediately after its assembly.
  • FIG. 4 shows an enlarged representation of the side of the low-voltage outlet M of an ignition coil 1. It is provided that a wire is wound on a coil former 4, so that the secondary winding 5 provided here results. One end of the wire of the secondary winding 5 is attached to a so-called connecting post 6, from which the wire winds on the peripheral surface of the bobbin 4 and extends over a defined contact area. This contact area also serves as a contact area 7 for a contact spring 8 shown in FIGS. 5 to 9 for establishing an electrical contact between the secondary winding 5 and the contact spring 8 itself.
  • the contact spring 8 is pushed in the direction of arrow 9 according to FIG. 8 over guide means 10.
  • the contact spring 8 slides along a surface 11 of the ignition coil rod 3 until it is a nose-like Element 12 reached.
  • the contact spring 8 slides further on this nose-like element 12, so that it is guided at a distance from the coil former 4 shown in FIG. 8 or at a distance from the secondary winding 5.
  • the nose-like element 12 penetrates an opening 13 of the contact spring 8 shown in FIGS. 9 and 10, so that the underside 14 of the contact spring 8 lies completely on the secondary winding 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

The invention relates to an electric connection system for producing an ignition coil. The aim of the invention is to substitute conventional methods like thermal methods for contacting thin varnished wires of ignition coils therebetween. The inventive method consists in placing a contact blade (8) on the side of a low voltage output (N) and guiding it above corresponding secondary windings without contacting it and in blocking said blade by latching according to the elasticity or position thereof. Elements arranged on the contact blade (8) punch the insulation layer which encompasses the secondary winding, thereby making it possible to produce an electrical connection without using thermal methods.

Description

Elektrische Kontaktierung dünner Lackdrähte von Sekundärwicklungen von ZündspulenElectrical contacting of thin enamelled wires from secondary windings of ignition coils
Die Erfindung betrifft eine elektrische Verbindungsanordnung zur Herstellung einer Zündspule, insbesondere einer Stabzündspule mit einem Zündspu- lenstab mit einem Hochspannungsabgang sowie einem Niederspannungsabgang.The invention relates to an electrical connection arrangement for producing an ignition coil, in particular a pencil ignition coil with an ignition coil rod with a high-voltage outlet and a low-voltage outlet.
Stand der TechnikState of the art
Zündspulen erzeugen Hochspannungsfunken. Dieser springt bei der an der Zündspule angeordneten Zündkerze an deren Elektroden über und zündet so beispielsweise das uft-Benzin-Gemisch einer Brennkraftmaschine. In der Regel wird diese Zündkerze mit einer Zündspule mit Hochspannung versorgt. Innerhalb der Zündspule ist eine Primärwicklung und eine entsprechende Sekundärwicklung vorgesehen. Die Primärwicklung ist mit ihrem einen Ende an einen Zündanlassschalter gekoppelt, wobei ihr anderes Ende mit einem sogenannten Unterbrecher verbunden ist.Ignition coils generate high voltage sparks. In the case of the spark plug arranged on the ignition coil, this jumps over to its electrodes and thus ignites, for example, the uft-gasoline mixture of an internal combustion engine. As a rule, this spark plug is supplied with a high-voltage ignition coil. A primary winding and a corresponding secondary winding are provided within the ignition coil. One end of the primary winding is coupled to an ignition starter switch, and the other end is connected to a so-called breaker.
Die Sekundärwicklung, also die Wicklung, die für die Entstehung des Zündfunkens verantwortlich ist, ist im Inneren der Zündspule mit dem einen Ende der Primärwicklung verbunden, so dass diese an Masse liegt. Das andere Ende der Sekundärwicklung ist mit dem Hochspannungsabgang verbunden, der wiederum entweder mit einem Zündkabel, das zur Zündkerze führt, verbunden ist oder an dem unmittelbar die Zündkerze angeordnet ist. Die Sekundärwicklung selbst besteht aus einem dünnen Draht, der mit einer entsprechenden Lackschicht überzogen ist, um bei der Umwicklung eines bestimmten Trägerkörpers bzw. Spulenkörpers die Kontaktierung der einzelnen Drähte zu vermeiden. Nachdem die Sekundärwicklungen auf einen Träger gewickelt worden sind, werden die Enden der jeweiligen Drähte kontaktiert . Hierzu sind in der Regel thermische Kontaktierungsverfahren bekannt, beispielsweise Löten oder Schweißen.The secondary winding, that is to say the winding which is responsible for the generation of the ignition spark, is connected inside the ignition coil to one end of the primary winding, so that it is connected to ground. The other end of the secondary winding is connected to the high-voltage outlet, which in turn is either connected to an ignition cable that leads to the spark plug or on which the spark plug is arranged directly. The secondary winding itself consists of a thin wire, which is coated with a corresponding lacquer layer, in order to avoid contacting the individual wires when wrapping a specific carrier body or coil former. After the secondary windings have been wound on a carrier, the ends of the respective wires are contacted. For this purpose, thermal contacting methods are generally known, for example soldering or welding.
Nachteile des Standes der TechnikDisadvantages of the prior art
Insbesondere bezüglich der Kontaktierung von Primär- und Sekundärwicklung sind unterschiedliche Arbeitsprozesse notwendig. Dies erfordert höhere Anlagekosten, mehrere Montageschritte und auch eine bestimmte Anzahl von Anschlussteilen, die notwendig sind, um eine elektrische Verbindung ent- sprechend herstellen zu können.Different work processes are necessary, especially with regard to the contacting of primary and secondary windings. This requires higher system costs, several assembly steps and also a certain number of connection parts that are necessary in order to be able to establish an electrical connection accordingly.
Zudem gestaltete es sich oft schwierig, auf sehr engem Bauraum hier eine entsprechende Kontaktierung mittels den bekannten thermischen Verfahren herbeizuführen.In addition, it was often difficult to achieve appropriate contacting here using the known thermal processes in a very small installation space.
Aufgabe der ErfindungObject of the invention
Die Aufgabe der Erfindung ist es, eine Verbindungsanordnung zwischen einem Zündspulenstab einer Zündspule und einer Sekundär- bzw. Primärwick- lung herzustellen, die kostengünstig und einfach realisierbar ist.The object of the invention is to produce a connection arrangement between an ignition coil rod of an ignition coil and a secondary or primary winding which is inexpensive and easy to implement.
Lösung der AufgabeSolution of the task
Das Grundprinzip der Lösung der Aufgabe besteht darin, das an sich aus dem Stand der Technik bekannte thermische Kontaktierungsverfahren zu ersetzen. Dies erfolgt dadurch, dass zusätzliche Kontaktierungselemente geschaffen worden sind, die bei der Montage den mit Lack ummantelten Draht der Sekundärwicklung durchbrechen und so eine entsprechende Kontaktierung herbeiführen. Vorteile der ErfindungThe basic principle of the solution to the problem is to replace the thermal contacting method known per se from the prior art. This is done in that additional contacting elements have been created which, during assembly, break through the wire of the secondary winding covered with lacquer and thus bring about appropriate contacting. Advantages of the invention
Als Vorteil für die elektrische Verbindungsanordnung zur Herstellung ei- ner Zündspule kann insbesondere gesehen werden, dass die erfindungsgemäße Kontaktierung in bereits vorhandene Bauteile integriert ist und dadurch einfache Vorgänge sicher herstellbar sind.As an advantage for the electrical connection arrangement for producing an ignition coil, it can be seen in particular that the contacting according to the invention is integrated into already existing components and that simple processes can thereby be reliably produced.
Das hier vorgeschlagene „kalte" Kontaktierungsverfahren hat gegenüber dem bisherigen Verfahren den Vorteil, dass keine zusätzlichen Anlagekosten notwendig sind. Ferner reduzieren sich zusätzlich Montageschritte und auch eine Reduzierung von Ausschlussteilen kann durch die erfindungsgemäße Ausführung verzeichnet werden.The "cold" contacting method proposed here has the advantage over the previous method that no additional system costs are necessary. Furthermore, assembly steps are reduced and a reduction in exclusion parts can also be recorded by the embodiment according to the invention.
Ein weiterer wesentlicher Vorteil der Erfindung besteht darin, dass für die Durchführung der Kontaktierung keine Bauraumoptimierung erfolgen muss. Dies bedeutet, dass kein Freiraum im Bereich der Kontaktierung z.B. für Schweißzangen, Lötkolben oder dergleichen vorgehalten werden muss .Another important advantage of the invention is that no installation space has to be optimized to carry out the contacting. This means that there is no free space in the area of contacting e.g. must be kept for welding guns, soldering irons or the like.
Auf der Seite des Niederspannungsabgangs ist erfindungsgemäss vorgesehen, eine Kontaktfeder über Führungsmittel einzuschieben, die während ihres Einschiebevorgangs über ein nasenartiges Element gleitet, so dass die Kontaktfeder zunächst ohne Berührung der Sekundärwicklung über diese führbar ist.On the side of the low-voltage outlet, the invention provides for a contact spring to be inserted via guide means, which slides over a nose-like element during its insertion process, so that the contact spring can initially be guided over the secondary winding without touching it.
Bei Erreichen einer definierten Stellung, die durch eine Öffnung bzw. Ausnehmung auf Seiten der Kontaktfeder vorgesehen ist, schnappt das nasenartige Element in diese Öffnung, so dass die Kontaktfeder auf der Se- kundärwicklung aufliegt.When a defined position is reached, which is provided through an opening or recess on the side of the contact spring, the nose-like element snaps into this opening, so that the contact spring rests on the secondary winding.
Auf der zum Spulenkörper hinweisenden Seite der Kontaktfeder sind Kontaktelemente vorgesehen, die beim Schnappvorgang auf die mit Isolierung versehenen Drähte des Spulenkörpers drücken und durch diesen Schnappvor- gang bewirken, dass die Isolierung an den entsprechenden Kontaktstellen aufgebrochen wird, so dass ein elektrischer Kontakt zwischen den einzelnen Drähten des Spulenkörpers und der Kontaktfeder herstellbar ist. Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung, sowie den Zeichnungen und den Ansprüchen hervor.On the side of the contact spring pointing towards the coil body, contact elements are provided which, during the snap process, press on the wires of the coil body provided with insulation and, by means of this snap process, cause the insulation to be broken at the corresponding contact points, so that electrical contact between the individual Wires of the bobbin and the contact spring can be produced. Further advantageous embodiments emerge from the following description, as well as the drawings and the claims.
Zeichnungendrawings
Es zeigenShow it
Fig. 1 Eine perspektivische Ansicht auf eine Zündspule mit einer Seite für den Hochspannungsabgang und einer weiteren Seite für den Niederspannungsabgang;Fig. 1 is a perspective view of an ignition coil with one side for the high voltage outlet and another side for the low voltage outlet;
Fig. 2 Eine Schnittdarstellung durch die Zündspule gemäß Fig. 1;FIG. 2 shows a sectional view through the ignition coil according to FIG. 1;
Fig. 3 Eine perspektivische Ansicht auf einen Zündspulenstab, der in dem in Fig. 1 dargestellten Zündspulengehäuse angeordnet ist;Fig. 3 is a perspective view of an ignition coil rod which is arranged in the ignition coil housing shown in Fig. 1;
Fig. 4 Eine perspektivische Ansicht auf die Seite des Niederspannungsabganges einer Zündspule;Fig. 4 is a perspective view of the side of the low voltage outlet of an ignition coil;
Fig. 5 Eine perspektivische Ansicht auf den Zündspulenstab, insbesondere auf die Seite des Niederspannungsabganges mit einer Kontaktfeder;5 shows a perspective view of the ignition coil rod, in particular on the side of the low-voltage outlet with a contact spring;
Fig. 6 Eine perspektivische Ansicht einer vergrößerten Darstellung der Seite des Niederspannungsabgangs des Zündspulenstabes mit einer Kontaktfeder in Vormontagestellung;6 shows a perspective view of an enlarged illustration of the side of the low-voltage outlet of the ignition coil rod with a contact spring in the preassembly position;
Fig. 7 Einen Schnitt durch den Zündspulenstab gemäß Fig. 5;7 shows a section through the ignition coil rod according to FIG. 5;
Fig. 8 Eine vergrößerte Darstellung des Schnittes gemäß Fig. 7;Fig. 8 is an enlarged view of the section of FIG. 7;
Fig. 9 Eine perspektivische Ansicht auf die erfindungsgemäße Kontaktfeder zur Montage auf der Seite des Niederspannungsabgangs ;9 shows a perspective view of the contact spring according to the invention for mounting on the side of the low-voltage outlet;
Fig. 10 Eine vergrößerte Darstellung der Kontaktfeder gemäß Fig. 9. Beschreibung eines Ausführungsbeispiels10 is an enlarged view of the contact spring of FIG .. 9 Description of an embodiment
In Fig. 1 ist eine perspektivische Ansicht einer Zündspule 1 dargestellt. Die Zündspule 1 umfasst ein Zündspulengehäuse 2 und einen in dem Zündspulengehäuse 2 angeordneten Zündspulenstab 3. Ferner weist die Zündspule 1 eine Seite für einen Hochspannungsabgang H und eine Seite für den Nieder- spannungsabgang N auf. Die Seite des Niederspannungsabgangs N ist dafür vorgesehen, um einen Kontakt mit einer in der Zeichnung nicht näher dar- gestellte Stromversorgung herzustellen, wobei die Seite des Hochspannungsabgangs H zur Verbindung mit einem in der Zeichnung nicht näher dargestellten Zündkabel oder einer Zündkerze vorgesehen ist.1 shows a perspective view of an ignition coil 1. The ignition coil 1 comprises an ignition coil housing 2 and an ignition coil rod 3 arranged in the ignition coil housing 2. Furthermore, the ignition coil 1 has a side for a high-voltage outlet H and a side for the low-voltage outlet N. The side of the low-voltage outlet N is provided in order to make contact with a power supply not shown in the drawing, the side of the high-voltage outlet H being provided for connection to an ignition cable or a spark plug (not shown in the drawing).
In Fig. 2 ist die in Fig. 1 dargestellte Zündspule 1 in einer Schnittdar- Stellung gezeigt; die dargestellten Bereiche sind solche, die sich auf die erfindungswesentlichen Merkmale der Erfindung beziehen, die in den nachfolgenden Figuren näher dargestellt sind.In Fig. 2, the ignition coil 1 shown in Fig. 1 is shown in a sectional view; the areas shown are those which relate to the features of the invention which are essential to the invention and which are shown in more detail in the following figures.
In Fig. 3 ist der Zündspulenstab 3 mit jeweils einer Seite für den Hoch- spannungsabgang H und einer Seite für den Niederspannungsabgang N dargestellt, der unmittelbar nach seiner Montage als Baueinheit in das in den Fig. 1 und 2 dargestellte Zündspulengehäuse 2 einführbar ist.3 shows the ignition coil rod 3, each with one side for the high-voltage outlet H and one side for the low-voltage outlet N, which can be inserted as a structural unit into the ignition coil housing 2 shown in FIGS. 1 and 2 immediately after its assembly.
In Fig. 4 ist eine vergrößerte Darstellung der Seite des Niederspannungs- abgangs M einer Zündspule 1 dargestellt. Dabei ist vorgesehen, auf einen Spulenkörper 4 einen Draht zu wickelt, so dass sich die hier vorgesehene Sekundärwicklung 5 ergibt. Das eine Ende des Drahtes der Sekundärwicklung 5 wird an einen sogenannten Anbindepfosten 6 angebracht, von dem aus sich der Draht auf der Umfangfläche des Spulenkörpers 4 wickelt und sich über einen definierten Auflagebereich erstreckt. Dieser Auflagebereich dient gleichzeitig als Kontaktierbereich 7 für eine in Fig. 5 bis 9 dargestellte Kontaktfeder 8 zur Herstellung eines elektrischen Kontakts zwischen der Sekundärwicklung 5 und der Kontaktfeder 8 selbst.FIG. 4 shows an enlarged representation of the side of the low-voltage outlet M of an ignition coil 1. It is provided that a wire is wound on a coil former 4, so that the secondary winding 5 provided here results. One end of the wire of the secondary winding 5 is attached to a so-called connecting post 6, from which the wire winds on the peripheral surface of the bobbin 4 and extends over a defined contact area. This contact area also serves as a contact area 7 for a contact spring 8 shown in FIGS. 5 to 9 for establishing an electrical contact between the secondary winding 5 and the contact spring 8 itself.
Nachdem die Sekundärwicklung 5 an dem Spulenkörper 4 hergestellt ist, ist die Auflagefläche 7 vollständig mit der Sekundärwicklung 5 bedeckt. Anschließend wird die Kontaktfeder 8 in Pfeilrichtung 9 gemäß Fig. 8 über Führungsmittel 10 geschoben. Dabei gleitet die Kontaktfeder 8 auf einer Oberfläche 11 des Zündspulenstabes 3 entlang, bis diese ein nasenartiges Element 12 erreicht. Auf diesem nasenartigen Element 12 gleitet die Kontaktfeder 8 weiter, so dass diese im Abstand zu dem in Fig. 8 dargestellten Spulenkörper 4 bzw. im Abstand zu der Sekundärwicklung 5 geführt wird. Erreicht die Kontaktfeder 8 eine definierte Stellung, so durch- dringt das nasenartige Element 12 eine in den Fig. 9 und 10 dargestellte Öffnung 13 der Kontaktfeder 8, so dass die Unterseite 14 der Kontaktfeder 8 vollständig auf der Sekundärwicklung 5 anliegt. Kontaktelemente 15, die ebenfalls auf der Unterseite 14 der Kontaktfeder 8 angeordnet sind, durchbrechen die Isolationsschicht der Sekundärwicklung 5 und sorgen da- für, dass ein elektrischer Kontakt zwischen der Kontaktfeder 8 und der Sekundärwicklung 5 entsteht. Damit ist eine elektrische Verbindung geschaffen worden, die ohne Anwendung eines thermischen Verfahrens hergestellt worden ist. After the secondary winding 5 is produced on the coil former 4, the support surface 7 is completely covered with the secondary winding 5. Subsequently, the contact spring 8 is pushed in the direction of arrow 9 according to FIG. 8 over guide means 10. The contact spring 8 slides along a surface 11 of the ignition coil rod 3 until it is a nose-like Element 12 reached. The contact spring 8 slides further on this nose-like element 12, so that it is guided at a distance from the coil former 4 shown in FIG. 8 or at a distance from the secondary winding 5. When the contact spring 8 reaches a defined position, the nose-like element 12 penetrates an opening 13 of the contact spring 8 shown in FIGS. 9 and 10, so that the underside 14 of the contact spring 8 lies completely on the secondary winding 5. Contact elements 15, which are also arranged on the underside 14 of the contact spring 8, break through the insulation layer of the secondary winding 5 and ensure that electrical contact between the contact spring 8 and the secondary winding 5 occurs. An electrical connection has thus been created which has been established without using a thermal process.

Claims

A N S P R Ü C H E EXPECTATIONS
1. Elektrische Verbindungsanordnung zur Herstellung einer Zündspule, insbesondere Stabzündspule mit einem Zündspulenstab mit einem Hochspannungsabgang sowie einem Niederspannungsabgang, dadurch gekennzeichnet, dass auf der Seite des Niederspannungsabganges (H) eine Kontaktfeder (8) vorgesehen ist, die über einen Kontaktierbereich (7) eines Spulenkörpers (4) , der mit einer Sekundärwicklung (5) versehen ist, schiebbar ist, wobei diese Kontaktfeder (8) in eine Endstellung die Sekundärwicklung (5) kontaktiert.1. Electrical connection arrangement for producing an ignition coil, in particular rod ignition coil with an ignition coil rod with a high-voltage outlet and a low-voltage outlet, characterized in that a contact spring (8) is provided on the side of the low-voltage outlet (H), which via a contact area (7) of a coil former (4), which is provided with a secondary winding (5), can be pushed, said contact spring (8) making contact with the secondary winding (5) in an end position.
2. Verbindungsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Kontaktfeder (8) über ein an dem Zündspulenstab (3) angeordnetes nasenartiges Element (12) schiebbar ist, bis dieses Element eine in der Kontaktfeder (8) ausgebildete Öffnung (13) durchdringt, so dass das Element (12) die Kontaktfeder (8) miteinander verrasten.2. Connection arrangement according to claim 2, characterized in that the contact spring (8) can be pushed over a nose-like element (12) arranged on the ignition coil rod (3) until this element penetrates an opening (13) formed in the contact spring (8), so that the element (12) lock the contact spring (8) together.
3. Verbindungsanordnung nach Anspruch 1 oder 2 , dadurch gekennzeich- net, dass die Kontaktfeder (8) auf der zum Spulenkörper hinweisenden Seite Kontaktierelemente (15) aufweist, die eine die Sekundärwicklung (4) umgebende Isolationsschicht durchbrechen und diese kontaktiere . 3. Connection arrangement according to claim 1 or 2, characterized in that the contact spring (8) on the side facing the coil body has contact elements (15) which break through an insulation layer surrounding the secondary winding (4) and contact it.
EP20030762341 2002-11-07 2003-07-25 Electrical contact between thin varnished wires of the secondary winding of an ignition coil Expired - Lifetime EP1563520B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251841A DE10251841A1 (en) 2002-11-07 2002-11-07 Electrical connector for rod-shaped ignition coil, has contact spring which is displaced across contact region, and makes contact with secondary coil when in end position
DE10251841 2002-11-07
PCT/DE2003/002513 WO2004042749A1 (en) 2002-11-07 2003-07-25 Electrical contact between thin varnished wires of the secondary winding of an ignition coil

Publications (2)

Publication Number Publication Date
EP1563520A1 true EP1563520A1 (en) 2005-08-17
EP1563520B1 EP1563520B1 (en) 2015-05-20

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EP20030762341 Expired - Lifetime EP1563520B1 (en) 2002-11-07 2003-07-25 Electrical contact between thin varnished wires of the secondary winding of an ignition coil

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EP (1) EP1563520B1 (en)
JP (1) JP4575164B2 (en)
DE (1) DE10251841A1 (en)
WO (1) WO2004042749A1 (en)

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DE102005047184A1 (en) * 2005-09-30 2007-04-05 Robert Bosch Gmbh Ignition coil for internal combustion engine has magnetically active core with injection moulded plastics coil body with winding area for wire which is free of parting lines in this area
DE102006020170A1 (en) * 2006-05-02 2007-11-08 Robert Bosch Gmbh Ignition coil, in particular for an internal combustion engine of a motor vehicle
DE102011082230B4 (en) 2011-04-28 2024-06-27 Robert Bosch Gmbh Electrical connection arrangement and method for establishing an electrical contact between a contact element and an enamel wire
DE102012212617A1 (en) 2012-07-18 2014-01-23 Robert Bosch Gmbh Electrical connection arrangement for an ignition coil
ITUB20169987A1 (en) * 2016-01-14 2017-07-14 Tyco Electronics Amp Italia Srl CONNECTOR FOR MAGNETIC COIL
CN111430130B (en) * 2020-05-07 2021-02-05 扬州硕宇高压电气有限公司 Conductive rod convenient to clean and manufacturing method

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JPH0625945Y2 (en) 1988-08-05 1994-07-06 東洋電装株式会社 Engine ignition coil
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See references of WO2004042749A1 *

Also Published As

Publication number Publication date
WO2004042749A1 (en) 2004-05-21
DE10251841A1 (en) 2004-05-19
JP4575164B2 (en) 2010-11-04
JP2006505925A (en) 2006-02-16
EP1563520B1 (en) 2015-05-20
US20060211292A1 (en) 2006-09-21
US7305751B2 (en) 2007-12-11

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