EP1709650A1 - Electrical contact of thin enamel covered wires of secondary windings of ignition coils comprising a contact crown and a contact element - Google Patents

Electrical contact of thin enamel covered wires of secondary windings of ignition coils comprising a contact crown and a contact element

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Publication number
EP1709650A1
EP1709650A1 EP04804775A EP04804775A EP1709650A1 EP 1709650 A1 EP1709650 A1 EP 1709650A1 EP 04804775 A EP04804775 A EP 04804775A EP 04804775 A EP04804775 A EP 04804775A EP 1709650 A1 EP1709650 A1 EP 1709650A1
Authority
EP
European Patent Office
Prior art keywords
contact
contact element
primary
secondary winding
ignition coil
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
EP04804775A
Other languages
German (de)
French (fr)
Other versions
EP1709650B1 (en
Inventor
Bernd Fischer
Klaus Lerchenmueller
Konstantin Lindenthal
Thomas Breckle
Juergen Raedler
Werner Steinberger
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 EP1709650A1 publication Critical patent/EP1709650A1/en
Application granted granted Critical
Publication of EP1709650B1 publication Critical patent/EP1709650B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

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. In the case of the spark plug arranged on the ignition coil, this jumps over to its electrodes and thus ignites the air-gasoline mixture of an internal combustion engine, for example. In the
  • this spark plug is supplied with a high-voltage ignition coil.
  • Secondary winding provided. 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 i.e. the winding that is responsible for the ignition spark
  • the secondary winding is inside the ignition coil with one End of the primary winding connected 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 leading 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.
  • 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, an ignition coil and a secondary or primary winding, which is inexpensive and easy to implement.
  • 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 element to be inserted via guide means.
  • the contact element is designed in such a way that one end is fanned out like a tulip in the sliding direction and thus slides over the primary winding, which is arranged on the coil former, during the sliding on.
  • the other end is designed such that it can be fixed in a pocket.
  • the contact element additionally has a sliding surface which points to the primary winding.
  • the contact element presses with its sliding surface against the insulated wires of the coil body, whereby the insulation is broken at the corresponding contact points, so that electrical contact can be established between the individual wires of the coil body and the contact element.
  • the contact element is preferably designed such that it has a waist to achieve its mechanical spring-like properties.
  • the contact elements configured according to the invention are combined to form a contact crown.
  • the individual contact elements according to the invention are fixed to a ring element on their side facing away from the sliding surface.
  • This contact crown preferably consists of a one-piece part, it being conceivable that the contact crown can be produced in a single operation (stamping and bending).
  • the individual contact elements slide on the surface of the winding while the contact crown is being pushed onto the secondary windings.
  • the tulip-like design of the contact crown prevents the windings from being displaced or damaged.
  • the position of the contact crown is defined by a stop which is at the same time receiving the end of the secondary winding in the formation of a connecting post. This is also caused by the fact that the diameter of the contact beads is larger than the secondary coil former plus twice the diameter of the secondary winding.
  • a ring element is pushed over the contact crown, through which an interference fit of the contact element on the secondary winding and thus contact of the contact elements of the contact crown with the secondary winding is achieved.
  • 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 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 a contact element according to the invention
  • FIG. 6 shows a perspective view of the side of the low-voltage outlet of the ignition coil rod with the contact element according to the invention according to FIG. 5;
  • FIG 7 shows a further perspective view of the side of the low-voltage outlet of the ignition coil rod with the 5 contact element according to FIG 5, but without showing the secondary winding.
  • FIG. 8 shows a perspective view of a contact crown according to the invention, consisting essentially of the contact elements according to FIG. 7;
  • FIG. 9 is a perspective view on the side of the high-voltage outlet of an ignition coil with the representation of the inventive contact crown according to FIG. 8.
  • 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 one side for a high-voltage outlet H and one 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 that is not shown in the drawing.
  • the side of the high-voltage outlet H is 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.
  • FIG. 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 directly into the ignition coil housing 2 shown in FIGS. 1 and 2.
  • FIG. 4 shows an enlarged illustration of the side of the low-voltage outlet N of an ignition coil 1. It is provided that a wire is wound on a coil former 4, so that the primary winding 5 provided here results. One end of the wire of the primary 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 element 8 shown in the further figures for establishing an electrical contact between the primary winding 5 and the contact element 8 itself.
  • the contact element 8 according to the invention. It is formed in one piece and essentially consists of two areas, namely a contact area 9 and a fixing area 10, the two areas being separated from one another by a waist 11.
  • the contact element 8 is fanned out like a tulip and it has on one side 12 a sliding surface 13 which slides over the contacting area 9 of the primary winding 5 during the assembly of the contact element 8.
  • the contacting region 7 is completely covered with the primary winding 5.
  • the contact element 8 is pushed in the direction of arrow 14 according to FIG. 6 over guide means 10.
  • the contact element 8 slides along the contact area 7 of the primary winding 5 until it is fixed in the pocket-like configuration 16.
  • a primary coil former 17 is pushed on in the direction of arrow 18.
  • Primary bobbin 17 one side of the primary winding 5 and cause the insulation layer to break open. This is an electrical connection bond created, which has been produced without the use of a thermal process.
  • a contact crown 20 is shown in FIG. 8, which consists of several contact elements 8, which are fastened to a ring element 21 at their fixing area 10.
  • the contact crown 20 is formed in one piece.
  • the individual contact elements 8 of the contact crown 20 are fanned out like tulips towards their contacting areas 9.
  • the cup-like contact crown 20 is pushed in the direction of the arrow 21 onto the area of the high-voltage outlet H of an ignition coil 1 until the ring element 21 reaches a connecting post 6 '.
  • This type of design of a stop serves to create a position-correct position of the contact crown 20 with respect to the contacting area 7 or 9 of the secondary winding 5 'or the contact elements 8.
  • Arrow 18 causes the contacting areas 9 of the respective contact elements 8 to be pressed against the secondary winding 5 'in its contacting area 7', since lugs 23 are also provided within the secondary coil former 22 and press them against the secondary winding 5 'in the assembled state and so on Make electrical contact by breaking the insulation.

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

Abstract

THE invention relates to an electrical connection system for producing an ignition coil. The aim of the invention is to replace conventional contacting methods for connecting thin enamel covered wires in ignition coils, such as for example thermal methods. For this purpose, one contact element (8) each is provided between the primary or secondary winding (5, 5') and the respective high-voltage or low-voltage output (H, N) for establishing contact. Said contact element can be slid with its one end over the primary or secondary winding (5, 5') and is fixed with its other end. The contact element (8) is configured as a spring-type element, has a slide face (13) and is fanned out on at least one side in the sliding direction (arrow 18) in a tulip-shaped manner to such an extent that, once mounted, the contact element (8) exerts a resilient pressure on the primary or secondary winding (5, 5') and breaks the insulation layer, thereby establishing electrical contact.

Description

Elektrische Kontaktierung dünner Lackdrähte von Sekundärwicklungen von Zündspulen mit Kontaktkrone und KontaktelementElectrical contacting of thin enamelled wires of secondary windings of ignition coils with contact crown and contact element
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 Luft-Benzin-Gemisch einer Brennkraftmaschine. In derIgnition 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 the air-gasoline mixture of an internal combustion engine, for example. In the
Regel wird diese Zündkerze mit einer Zündspule mit Hochspannung versorgt.As a rule, this spark plug is supplied with a high-voltage ignition coil.
Innerhalb der Zündspule ist eine Primärwicklung und eine entsprechendeInside the ignition coil is a primary winding and a corresponding one
Sekundärwicklung vorgesehen. Die Primärwicklung ist mit ihrem einen Ende an einen Zündanlassschalter gekoppelt, wobei ihr anderes Ende mit einem sogenannten Unterbrecher verbunden ist.Secondary winding provided. 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, ver- bunden ist oder an dem unmittelbar die Zündkerze angeordnet ist.The secondary winding, i.e. the winding that is responsible for the ignition spark, is inside the ignition coil with one End of the primary winding connected 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 leading to the spark plug or on which the spark plug is arranged directly.
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 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 Technik 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 entsprechend herstellen zu können.Disadvantages of the prior art In particular with regard to the contacting of primary and secondary windings, different work processes are necessary. 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. Primärwicklung herzustellen, die kostengünstig und einfach realisierbar ist.The object of the invention is to produce a connection arrangement between an ignition coil rod, an ignition coil and a secondary or primary winding, which is inexpensive and easy to implement.
Lösung der Aufgabe 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 Primär- bzw. Sekundärwicklung durchbrechen und so eine entsprechende Kontaktierung herbeiführen.Solution of the task The basic principle of the solution to the problem is to replace the thermal contacting method known per se from the prior art. This takes place in that additional contacting elements have been created which break through the lacquer-coated wire of the primary or secondary winding during assembly and thus bring about appropriate contacting.
Die Lösung der Aufgabe wird durch die Merkmale von Anspruch 1 vorgeschlagen.The solution to the problem is proposed by the features of claim 1.
Vorteile der ErfindungAdvantages of the invention
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, ein Kontaktelement über Führungsmittel einzuschieben. Das Kontaktelement ist derart gestaltet, dass das eine Ende in Schieberichtung tulpenartig aufgefächert ist und so während des Aufschiebens über die Primärwicklung, die auf dem Spulenkörper angeordnet ist, gleitet. Das andere Ende ist derart ausgebildet, dass es in einer Tasche fixierbar ist.On the side of the low-voltage outlet, the invention provides for a contact element to be inserted via guide means. The contact element is designed in such a way that one end is fanned out like a tulip in the sliding direction and thus slides over the primary winding, which is arranged on the coil former, during the sliding on. The other end is designed such that it can be fixed in a pocket.
Um hier eine bessere Gleiteigenschaft vorzuweisen, weist das Kontaktelement zusätzlich eine Gleitfläche auf, die zu der Primärwicklung hinweist. Durch das Aufsetzen eines Primärspulenkörpers zumindest über einen Teil des Spulenkörpers wird das freie Ende des Kontaktelements mit seiner Gleitfläche durch eine Nase, die innerhalb des Primärspulenkörpers ange- ordnet ist, niedergedrückt.In order to have a better sliding property here, the contact element additionally has a sliding surface which points to the primary winding. By attaching a primary coil former at least over part of the coil former, the free end of the contact element with its sliding surface is pressed down by a nose which is arranged within the primary coil former.
Bei Erreichen einer definierten Stellung drückt das Kontaktelement mit seiner Gleitfläche gegen die mit Isolierung versehenen Drähte des Spulenkörpers, wodurch die Isolierung an den entsprechenden Kontaktstellen auf- gebrochen wird, so dass ein elektrischer Kontakt zwischen den einzelnen Drähten des Spulenkörpers und dem Kontaktelement herstellbar ist.When a defined position is reached, the contact element presses with its sliding surface against the insulated wires of the coil body, whereby the insulation is broken at the corresponding contact points, so that electrical contact can be established between the individual wires of the coil body and the contact element.
Bevorzugt ist das Kontaktelement derart ausgebildet, dass es zur Erlangung seiner mechanischen federartigen Eigenschaften eine Taille aufweist.The contact element is preferably designed such that it has a waist to achieve its mechanical spring-like properties.
Insbesondere auf der Seite des Hochspannungsabgangs ist vorgesehen, die erfindungsgemäß ausgestalteten Kontaktelemente zu einer Kontaktkrone zusammenzufassen. Hierbei werden die einzelnen erfindungsgemäßen Kontaktelemente auf ihrer von der Gleitfläche wegweisenden Seite an einem Ring- element fixiert. Bevorzugt besteht diese Kontaktkrone aus einem einstückigen Teil, wobei vorstellbar ist, dass die Kontaktkrone in einem einzigen Arbeitsgang (Stanzen und Biegen) herstellbar ist.In particular on the side of the high-voltage outlet, it is provided that the contact elements configured according to the invention are combined to form a contact crown. Here, the individual contact elements according to the invention are fixed to a ring element on their side facing away from the sliding surface. This contact crown preferably consists of a one-piece part, it being conceivable that the contact crown can be produced in a single operation (stamping and bending).
Während des Aufschiebens der Kontaktkrone auf die Sekundärwicklungen gleiten die einzelnen Kontaktelemente auf der Oberfläche der Wicklung.The individual contact elements slide on the surface of the winding while the contact crown is being pushed onto the secondary windings.
Durch die tulpenartige Ausgestaltung der Kontaktkrone wird vermieden, das die Wicklungen verschoben oder beschädigt werden. Durch einen Anschlag, der gleichzeitig Aufnahme des Endes der Sekundärwicklung in der Ausbildung eines Anbindepfostens ist, ist die Position der Kontaktkrone defi- niert. Dies wird auch dadurch bewirkt, dass der Durchmesser der Kontaktkorne größer ist als der Sekundärspulenkörper plus zweimal der Durchmesser der Sekundärwicklung. In einem weiteren Schritt wird ein Ringelement über die Kontaktkrone geschoben, durch die ein Presssitz des Kontaktelements auf der Sekundärwicklung und damit ein Kontaktieren der Kontaktelemente der Kontaktkrone mit der Sekundärwicklung erreicht wird.The tulip-like design of the contact crown prevents the windings from being displaced or damaged. The position of the contact crown is defined by a stop which is at the same time receiving the end of the secondary winding in the formation of a connecting post. This is also caused by the fact that the diameter of the contact beads is larger than the secondary coil former plus twice the diameter of the secondary winding. In a further step, a ring element is pushed over the contact crown, through which an interference fit of the contact element on the secondary winding and thus contact of the contact elements of the contact crown with the secondary winding is achieved.
Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung, sowie den Zeichnungen und den Ansprüchen hervor.Further advantageous embodiments emerge from the following description, as well as the drawings and the claims.
Zeichnungen Es zeigenDrawings show 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,. 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 ein erfindungsgemäßes Kontaktelement;5 shows a perspective view of a contact element according to the invention;
Fig. 6 Eine perspektivische Ansicht der Seite des Niederspannungsabgangs des Zündspulenstabes mit dem erfindungsgemäßen Kontakt- element gemäss Fig. 5;6 shows a perspective view of the side of the low-voltage outlet of the ignition coil rod with the contact element according to the invention according to FIG. 5;
Fig. 7 Eine weitere perspektivische Ansicht der Seite des Niederspannungsabgangs des Zündspulenstabes mit dem erfindungsgemä- ßen Kontaktelement gemäss Fig. 5, jedoch ohne Darstellung der Sekundärwicklung;7 shows a further perspective view of the side of the low-voltage outlet of the ignition coil rod with the 5 contact element according to FIG 5, but without showing the secondary winding.
Fig. 8 Eine perspektivische Ansicht auf eine erfindungsgemäße Kon- taktkrone, bestehend im wesentlichen aus den Kontaktelementen gemäss Fig. 7;8 shows a perspective view of a contact crown according to the invention, consisting essentially of the contact elements according to FIG. 7;
Fig. 9 Eine perspektivische Ansicht auf die Seite des Hochspannungsabgangs einer Zündspule mit der Darstellung der erfindungsge- mäßen Kontaktkrone gemäss Fig. 8.9 is a perspective view on the side of the high-voltage outlet of an ignition coil with the representation of the inventive contact crown according to FIG. 8.
Beschreibung eines AusführungsbeispielsDescription 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 Niederspannungsabgang 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 one side for a high-voltage outlet H and one 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 that is not shown in the drawing. The side of the high-voltage outlet H is 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. Seite des Niederspannungsabgangs NFIG. 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 directly into the ignition coil housing 2 shown in FIGS. 1 and 2. Low voltage outlet N side
In Fig. 4 ist eine vergrößerte Darstellung der Seite des Niederspannungsabgangs N einer Zündspule 1 dargestellt. Dabei ist vorgesehen, auf einen Spulenkörper 4 einen Draht zu wickeln, so dass sich die hier vorgesehene Primärwicklung 5 ergibt. Das eine Ende des Drahtes der Primärwicklung 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 ein in den weiteren Figuren dar- gestelltes Kontaktelement 8 zur Herstellung eines elektrischen Kontakts zwischen der Primärwicklung 5 und dem Kontaktelement 8 selbst.FIG. 4 shows an enlarged illustration of the side of the low-voltage outlet N of an ignition coil 1. It is provided that a wire is wound on a coil former 4, so that the primary winding 5 provided here results. One end of the wire of the primary 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 element 8 shown in the further figures for establishing an electrical contact between the primary winding 5 and the contact element 8 itself.
In Fig. 5 ist das erfindungsgemäße Kontaktelement 8 dargestellt. Es ist einstückig ausgebildet und besteht im Wesentlichen aus zwei Bereichen, nämlich einem Kontaktierbereich 9 und einem Fixierbereich 10, wobei die beiden Bereiche durch eine Taille 11 voneinander getrennt sind. Gerade im Kontaktierbereich 9 ist das Kontaktelement 8 tulpenartig aufgefächert und es weist an seiner einen Seite 12 eine Gleitfläche 13 auf, die während der Montage des Kontaktelements 8 über den Kontaktierbereich 9 der Pri- märwicklung 5 gleitet.5 shows the contact element 8 according to the invention. It is formed in one piece and essentially consists of two areas, namely a contact area 9 and a fixing area 10, the two areas being separated from one another by a waist 11. In the contacting area 9 in particular, the contact element 8 is fanned out like a tulip and it has on one side 12 a sliding surface 13 which slides over the contacting area 9 of the primary winding 5 during the assembly of the contact element 8.
Nachdem die Primärwicklung 5 (Fig. 6 und 7) an dem Spulenkörper 4 hergestellt ist, ist der Kontaktierbereich 7 vollständig mit der Primärwicklung 5 bedeckt. Anschließend wird das Kontaktelement 8 in Pfeilrichtung 14 gemäß Fig. 6 über Führungsmittel 10 geschoben. Dabei gleitet das Kontaktelement 8 auf dem Kontaktierbereich 7 der Primärwicklung 5 entlang, bis dieses in der taschenartigen Ausbildung 16 fixiert ist. In einem weiteren Schritt wird ein Primärspulenkörper 17 in Pfeilrichtung 18 aufgeschoben. Die innerhalb des Primärspulenkörpers 17 angeordneten Nasen 19 in Ausbildung jeweils eines Ambosses drücken im montierten Zustand desAfter the primary winding 5 (FIGS. 6 and 7) has been produced on the coil former 4, the contacting region 7 is completely covered with the primary winding 5. Subsequently, the contact element 8 is pushed in the direction of arrow 14 according to FIG. 6 over guide means 10. The contact element 8 slides along the contact area 7 of the primary winding 5 until it is fixed in the pocket-like configuration 16. In a further step, a primary coil former 17 is pushed on in the direction of arrow 18. The lugs 19 arranged within the primary coil former 17, each forming an anvil, press in the assembled state of the
Primärspulenkörpers 17 die eine Seite auf die Primärwicklung 5 und bewirken ein Aufbrechen der Isolationsschicht. Damit ist eine elektrische Ver- bindung geschaffen worden, die ohne Anwendung eines thermischen Verfahrens hergestellt worden ist.Primary bobbin 17 one side of the primary winding 5 and cause the insulation layer to break open. This is an electrical connection bond created, which has been produced without the use of a thermal process.
Seite des Hochspannungsabgangs H In einer weiteren Ausbildung ist in Fig. 8 eine Kontaktkrone 20 dargestellt, die aus mehreren Kontaktelementen 8 besteht, die an ihrem Fixierbereich 10 an einem Ringelement 21 befestigt sind. Bei dem hier dargestellten Ausführungsbeispiel ist die Kontaktkrone 20 einstückig ausgebildet. Die einzelnen Kontaktelemente 8 der Kontaktkrone 20 sind zu ihren Kontaktierbereichen 9 hin tulpenartig aufgefächert.Side of the high-voltage outlet H In a further embodiment, a contact crown 20 is shown in FIG. 8, which consists of several contact elements 8, which are fastened to a ring element 21 at their fixing area 10. In the embodiment shown here, the contact crown 20 is formed in one piece. The individual contact elements 8 of the contact crown 20 are fanned out like tulips towards their contacting areas 9.
Für die Montage der Kontaktkrone 20 gemäß Fig. 8 auf einem Spulenkörper 4 (Fig. 9) wird die becherartige Kontaktkrone 20 in Pfeilrichtung 21 auf den Bereich des Hochspannungsabgangs H einer Zündspule 1 geschoben, bis das Ringelement 21 einen Anbindepfosten 6' erreicht. Diese Art einer Ausbildung eines Anschlags dient dazu, eine lagegerechte Position der Kontaktkrone 20 in Bezug auf den Kontaktierbereich 7 bzw. 9 der Sekundärwicklung 5' bzw. der Kontaktelemente 8 zu schaffen.For the assembly of the contact crown 20 according to FIG. 8 on a coil former 4 (FIG. 9), the cup-like contact crown 20 is pushed in the direction of the arrow 21 onto the area of the high-voltage outlet H of an ignition coil 1 until the ring element 21 reaches a connecting post 6 '. This type of design of a stop serves to create a position-correct position of the contact crown 20 with respect to the contacting area 7 or 9 of the secondary winding 5 'or the contact elements 8.
Durch ein Aufschieben eines Sekundärspulenkörpers 22 in Richtung desBy sliding a secondary bobbin 22 in the direction of
Pfeils 18 wird ein Andrücken der Kontaktierbereiche 9 der jeweiligen Kontaktelemente 8 an die Sekundärwicklung 5' in dessen Kontaktierbereich 7' erreicht, da innerhalb des Sekundärspulenkörpers 22 ebenfalls Nasen 23 vorgesehen sind, die diese im montierten Zustand gegen die Sekundärwick- lung 5' drücken und so durch Aufbrechen der Isolierung eine elektrische Kontaktierung herstellen. Arrow 18 causes the contacting areas 9 of the respective contact elements 8 to be pressed against the secondary winding 5 'in its contacting area 7', since lugs 23 are also provided within the secondary coil former 22 and press them against the secondary winding 5 'in the assembled state and so on Make electrical contact by breaking the insulation.

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 zur Herstellung einer Kontaktierung zwischen der Primär- oder Sekundärwicklung (5, 5') und dem jeweiligen Hochspannungs- bzw. Niederspannungsabgang (H, N) jeweils ein Kontaktelement (8) vorgesehen ist, das mit seiner einen Seite über die Primär- bzw. Sekundärwicklung (5, 5') schiebbar ist und mit seiner anderen Seite fixiert ist, wobei das Kontaktelement (8), federartig ausgebildet, eine Gleitfläche (13) aufweist und in Schieberichtung (Pfeil 18) zumindest auf seiner einen Seite derart tulpenartig aufgefächert ist, dass im montierten Zustand das Kon- taktelement (8) auf die Primär- oder Sekundärwicklung (5, 5') federartig drückt und die Isolationsschicht gebrochen wird und eine elektrische Kontaktierung erfolgt.1. Electrical connection arrangement for producing an ignition coil, in particular pencil ignition coil with an ignition coil rod with a high-voltage outlet and a low-voltage outlet, characterized in that for establishing contact between the primary or secondary winding (5, 5 ') and the respective high-voltage or low-voltage outlet ( H, N) a contact element (8) is provided, one side of which can be pushed over the primary or secondary winding (5, 5 ') and the other side of which is fixed, the contact element (8) being spring-like , has a sliding surface (13) and is fanned out in tulip-like fashion at least on one side in the sliding direction (arrow 18) such that in the assembled state the contact element (8) presses spring-like on the primary or secondary winding (5, 5 ') and the insulation layer is broken and electrical contact is made.
2. Verbindungsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass mehrere Kontaktelemente (8) zu einer Kontaktkrone (20) verbunden sind, indem die jeweiligen Kontaktelemente (8) mit ihrem Fixierbereich (10) an einem Ringelelement (21) fixiert sind. 2. Connection arrangement according to claim 2, characterized in that a plurality of contact elements (8) are connected to form a contact crown (20) by the respective contact elements (8) with their fixing region (10) being fixed to a ring element (21).
3. Verbindungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Kontaktelement (8) in eine taschenartige Ausbildung (16) führbar ist.3. Connection arrangement according to claim 1, characterized in that the contact element (8) in a pocket-like configuration (16) can be guided.
4. Verbindungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Kontaktelement (8) auf seiner einen Seite eine Bohrung aufweist.4. Connection arrangement according to claim 1, characterized in that the contact element (8) has a bore on one side.
5. Verbindungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Kontaktelement (8) auf seiner einen Seite eine Sicke, eine Prägung oder eine sonstige Kontur aufweist.5. Connection arrangement according to claim 1, characterized in that the contact element (8) has on one side a bead, an embossing or another contour.
6. Verbindungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass über dem Kontaktelement (8) mindestens eine Nase (19, 23) zur de- finierter Erzeugung einer Anpresskraft des Kontaktelements (8) auf die Primär- und/oder Sekundärwicklung (5, 5') vorgesehen ist. 6. Connection arrangement according to claim 1, characterized in that above the contact element (8) at least one nose (19, 23) for the defined generation of a contact force of the contact element (8) on the primary and / or secondary winding (5, 5 ' ) is provided.
EP04804775A 2004-01-21 2004-12-13 Electrical contact of thin enamel covered wires of secondary windings of ignition coils comprising a contact crown and a contact element Active EP1709650B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002935A DE102004002935A1 (en) 2004-01-21 2004-01-21 Electrical contacting of thin enamel wires of secondary windings of ignition coils with contact crown and contact element
PCT/EP2004/053410 WO2005071700A1 (en) 2004-01-21 2004-12-13 Electrical contact of thin enamel covered wires of secondary windings of ignition coils comprising a contact crown and a contact element

Publications (2)

Publication Number Publication Date
EP1709650A1 true EP1709650A1 (en) 2006-10-11
EP1709650B1 EP1709650B1 (en) 2010-05-05

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EP04804775A Active EP1709650B1 (en) 2004-01-21 2004-12-13 Electrical contact of thin enamel covered wires of secondary windings of ignition coils comprising a contact crown and a contact element

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US (1) US7436278B2 (en)
EP (1) EP1709650B1 (en)
JP (1) JP4499726B2 (en)
DE (2) DE102004002935A1 (en)
WO (1) WO2005071700A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006020170A1 (en) * 2006-05-02 2007-11-08 Robert Bosch Gmbh Ignition coil, in particular for an internal combustion engine of a motor vehicle
DE102012221897A1 (en) 2012-11-29 2014-06-05 Robert Bosch Gmbh Electrical contact arrangement for contacting a coil
USD878304S1 (en) 2018-06-29 2020-03-17 Molex, Llc Contact for a connector

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Publication number Priority date Publication date Assignee Title
US4962361A (en) * 1989-08-29 1990-10-09 Honda Giken Kogyo Kabushiki Kaisha Ignition coil for engine
JPH0810174Y2 (en) * 1990-04-28 1996-03-27 東洋電装株式会社 Engine ignition coil device
US5225801A (en) * 1990-04-28 1993-07-06 Toyo Denso Kabushiki Kaisha Ignition coil device for engine
DE9403490U1 (en) * 1994-03-02 1995-06-29 Robert Bosch Gmbh, 70469 Stuttgart Ignition coil for an internal combustion engine
DE29611914U1 (en) * 1996-07-09 1997-11-06 Robert Bosch Gmbh, 70469 Stuttgart Ignition coil for an internal combustion engine
JP3473817B2 (en) * 1996-10-18 2003-12-08 株式会社デンソー Ignition coil for internal combustion engine
US6094122A (en) * 1999-09-08 2000-07-25 Ford Motor Company Mechanical locking connection for electric terminals
US6522232B2 (en) * 2001-04-26 2003-02-18 Delphi Technologies, Inc. Ignition apparatus having reduced electric field HV terminal arrangement
JP3997463B2 (en) * 2001-11-26 2007-10-24 株式会社デンソー Ignition coil for internal combustion engine

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Title
See references of WO2005071700A1 *

Also Published As

Publication number Publication date
EP1709650B1 (en) 2010-05-05
US20070216507A1 (en) 2007-09-20
DE502004011142D1 (en) 2010-06-17
JP2007506272A (en) 2007-03-15
JP4499726B2 (en) 2010-07-07
US7436278B2 (en) 2008-10-14
WO2005071700A1 (en) 2005-08-04
DE102004002935A1 (en) 2005-08-11

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