EP0634882A2 - Contact element - Google Patents

Contact element Download PDF

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Publication number
EP0634882A2
EP0634882A2 EP94110937A EP94110937A EP0634882A2 EP 0634882 A2 EP0634882 A2 EP 0634882A2 EP 94110937 A EP94110937 A EP 94110937A EP 94110937 A EP94110937 A EP 94110937A EP 0634882 A2 EP0634882 A2 EP 0634882A2
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EP
European Patent Office
Prior art keywords
contact
holder
element according
contact element
contact part
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
EP94110937A
Other languages
German (de)
French (fr)
Other versions
EP0634882B1 (en
EP0634882A3 (en
Inventor
Jörg Koch
Jagdish Singh
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.)
Hirschmann Electronics GmbH and Co KG
Original Assignee
Hirschmann Electronics GmbH and Co KG
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 Hirschmann Electronics GmbH and Co KG filed Critical Hirschmann Electronics GmbH and Co KG
Publication of EP0634882A2 publication Critical patent/EP0634882A2/en
Publication of EP0634882A3 publication Critical patent/EP0634882A3/en
Application granted granted Critical
Publication of EP0634882B1 publication Critical patent/EP0634882B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/17—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member on the pin
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means

Definitions

  • the invention relates to a contact element according to the preamble of claim 1.
  • a contact element is known in the form of soldered connections, for example in the busbar connection of the heating conductors of vehicle rear window heaters.
  • this type of connection has proven to be unsuitable, particularly for series production, because machine soldering in a machine is not possible without damage to the contact surface due to the special material selection and attachment of the contact surface required for application to glass.
  • the known solder connections of such contact points are made manually even in large quantities.
  • this procedure is complicated and requires particularly experienced professionals.
  • a still high reject rate of up to 1.5% cannot be avoided.
  • extensive tests are necessary to determine the errors and to avoid complaints as far as possible, so that the known connection is burdened with disproportionately high manufacturing costs.
  • the invention is therefore based on the object of providing a contact element of the type mentioned at the outset which is as simple as possible, cost-saving and can be produced mechanically with a low reject rate.
  • the contact reliability can be easily adapted to the requirements of the individual case by appropriate choice of the size of the contact pressure and the contact area and the material of the contact part.
  • the contact part is equipped with a large plate made of highly conductive material (copper) resting on the busbar.
  • the contact element into a contact and a holding part enables largely independent designs of these two parts and thus an optimization with regard to their function.
  • the holding part can be glued to the pane without impairing the contact.
  • the choice of materials is also without influence on the other part.
  • the clamping contact is realized by at least one clamping screw which, although it has to be actuated, on the other hand enables an arbitrarily high contact pressure and thus enables adaptation to the most varied requirements.
  • the compression spring can be a separate part, which is arranged, for example, around a mandrel. A much lower effort is achieved when the compression spring is not loose, but is either attached to the contact part or to the contact holder or - unless different materials of the actual contact part and the spring are required - is in one piece with the contact part.
  • a design of the contact element according to claim 7 is particularly advantageous, in which the contact part is detachably fastened in the contact holder, so that in the event of repairs or a replacement of the glass carrier, the supply line including the contact part does not have to be dismantled but only has to be detached from the contact holder.
  • the smallest possible thickness of the contact element is required for many applications.
  • An embodiment according to claim 8 is particularly suitable for this because it enables a minimal height above the glass support.
  • a releasable fastening according to claim 9 has the advantage that no measures are necessary to produce the fastening, since the locking takes place automatically when the contact part and holder are put together, and that only a simple operation is required to release the locking, namely the pushing out a locking lug from a locking projection.
  • these locking elements can be attached to the contact holder and contact part or to the compression spring.
  • the compression spring which is integral with or attached to the contact part, engages behind a projection of the contact holder with the free end part.
  • An embodiment of the contact element according to claim 10 is particularly advantageous for applications in which the connecting line is already assembled with a plug pin and then only has to be plugged into the simplest socket.
  • the contact holder can be attached to the glass carrier in any manner.
  • This mechanical stability of the attachment is further increased by a design of the contact holder made of ceramic (claim 12), because the temperature-dependent expansion coefficients of glass and ceramic are similar, so that the mechanical stresses between the cable holder and the glass support are so low even with strong temperature fluctuations that they Do not significantly affect the strength of the bracket.
  • Figures 1 and 2 each show a partially sectioned perspective view of a first and a second embodiment in principle.
  • a contact holder 1 made of insulating material is provided, which is glued to a metal foil 4 which is designed as a busbar for heating wires 2 and is applied to a vehicle rear window 3.
  • the contact holder 1 is shaped like a lid with three identical edge parts 5, a shorter connection-side edge part 5 'and a cover part 6.
  • the edge parts 5 are glued to the busbar 4 with their free bottom surfaces 7, the bottom part 7' of the edge part 5 'and the Busbar 4 remains an opening for the introduction of a contact part.
  • the contact part 8 is in two parts: it consists of a copper plate 9 and a leaf spring 10, which is clamped with one end portion 11 of the flanged plug-side end part 12 of the copper plate 9 and with the other, stop-side end portion 13 when mounted Contact element rests under pressure on the inner surface 14 of the cover part 6.
  • the stripped end 16 of a copper braid band 18 provided with an insulating jacket 17 is soldered onto the connection-side end part 15.
  • the contact part 8 provided with the copper strip 18 is inserted with the plug-side end part 12 ahead through the funnel-shaped opening between the bottom surface 7 'and the busbar 4 into the contact holder 1, the copper plate 9 being pressed by the pressure on the cover part 6 supporting leaf spring 10 rests with the entire lower surface on the busbar 4 and contacts it.
  • the end face of the connection-side end section 13 also engages behind the inner shoulder 19 of the connection-side edge part 5 'and is thereby secured against slipping out of the contact holder 1 in an absolutely vibration-proof manner.
  • this latching is simple by pressing down the leaf spring 10 by means of a pin-shaped object (for example a screwdriver blade) passed through an opening 20 of the cover part 6.
  • the contact holder 1 is very simple and inexpensive to manufacture as a series part in the die casting process.
  • the contact part 8 is also suitable for machine production with a minimum reject rate, both with regard to the production of the copper plate 9 and the leaf spring 10 and their clamp connection (stamping and bending method) and the soldered connection of the copper plate 9 and copper strip 18.
  • the separation into an actual contact piece (copper plate 9) and a leaf spring 10 generating the contact pressure also gives the advantage that the material for these parts can be optimally adapted to the respective requirements.
  • the contact element for high currents in that the actual contact piece is designed as a plate 9 made of highly conductive material (copper), the leaf spring 10 made of spring plate acting on the entire width of the copper plate 8 by means of a strong spring bears extensively on the busbar 4 to be contacted.
  • the contact part 21 is also a one-piece stamped and bent part made of spring sheet metal, which can also be produced practically free of rejects, the section of which in the contact holder 1 consists of an upper part 22 and a lower part which is angled by 180 ° and bears against the busbar 4 23 exists.
  • a tongue acting as a compression spring 24 is punched out of the upper part 22 and bent out in such a way that it rests under pressure on the inner surface 14 of the cover part 6 and at the same time with its free end edge on the shoulder 19.
  • This locking bracket is also very easily detachable here by means of a pin-shaped object to be pressed through the opening 20 onto the compression spring 24.
  • the stripped wire 26 of a cable 28 provided with an insulating jacket 27 is mechanically soldered to the connection-side end part 25 of the contact part 21. The connection is made in the manner already described in the exemplary embodiment according to FIG. 1.
  • this embodiment is characterized by an even more cost-effective production and, since the contact piece consists of spring plate, is particularly suitable for applications with currents that are not too high.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Bipolar Transistors (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Semiconductor Memories (AREA)
  • Resistance Heating (AREA)

Abstract

In the case of a contact element for electrically and mechanically connecting a contact area (4) applied to a glass carrier (3), in particular a busbar for heating conductors for vehicle windscreens, to a supply lead (18, 28), there is provided a contact part (8, 21), connected to the supply lead (18, 28), which is fixed in a contact holder (1) fixed on the glass carrier (3) and, under pressure, bears against the contact area (4). This clamp contacting ensures reliable contact-making and mechanical stability and is particularly suited for automated, mechanical production virtually without rejects. This holds true both for the production and the fixing of the contact holder (1) and for the production and the insertion of the contact part (8, 21) as well as its connection to the supply lead (18, 28). The reliability in terms of contact can in this case be matched in a simple manner to the requirements of the individual case by a corresponding choice of the magnitude of the contact pressure and of the contact area as well as of the material of the contact part (8, 21). Splitting the contact element into a contact part 8, 21 and a holder part (1) permits these parts to be designed largely independently of each other and thus an optimisation in terms of their function. <IMAGE>

Description

KontaktelementContact element

Die Erfindung betrifft ein Kontaktelement gemäß dem Oberbegriff des Anspruches 1.
Ein derartiges Kontaktelement ist in Form von Lötverbindungen z.B. beim Sammelschienenanschluß der Heizleiter von Fahrzeug-Heckscheibenheizungen bekannt. Diese Verbindungsart hat sich jedoch in der Praxis vor allem für die Serienherstellung als nicht geeignet herausgestellt, weil aufgrund der für das Aufbringen auf Glas erforderlichen speziellen Materialauswahl und Befestigung der Kontaktfläche eine maschinelle Lötung in einem Automaten nicht ohne Beschädigungen der Kontaktfläche möglich ist.
Aus diesem Grunde werden die bekannten Lötverbindungen derartiger Kontaktstellen auch bei hohen Stückzahlen manuell hergestellt. Dieses Verfahren ist jedoch kompliziert und erfordert besonders erfahrene Fachkräfte. Trotz dieses hohen Fertigungsaufwandes läßt sich aber eine immer noch hohe Ausschußrate von bis zu 1,5 % (insbesondere durch kalte Lötstellen) nicht vermeiden. Außerdem sind zur Feststellung der Fehler und zur weitgehenden Vermeidung von Reklamationen umfangreiche Prüfungen nötig, sodaß die bekannte Verbindung insgesamt mit unverhältnismäßig hohen Herstellungskosten belastet ist.The invention relates to a contact element according to the preamble of claim 1.
Such a contact element is known in the form of soldered connections, for example in the busbar connection of the heating conductors of vehicle rear window heaters. In practice, however, this type of connection has proven to be unsuitable, particularly for series production, because machine soldering in a machine is not possible without damage to the contact surface due to the special material selection and attachment of the contact surface required for application to glass.
For this reason, the known solder connections of such contact points are made manually even in large quantities. However, this procedure is complicated and requires particularly experienced professionals. Despite this high manufacturing effort, a still high reject rate of up to 1.5% (especially due to cold solder joints) cannot be avoided. In addition, extensive tests are necessary to determine the errors and to avoid complaints as far as possible, so that the known connection is burdened with disproportionately high manufacturing costs.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Kontaktelement der eingangs genannten Art zu schaffen, das möglichst einfach, kostensparend und mit geringer Ausschußrate maschinell herstellbar ist.The invention is therefore based on the object of providing a contact element of the type mentioned at the outset which is as simple as possible, cost-saving and can be produced mechanically with a low reject rate.

Diese Aufgabe ist durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.
Mit der erfindungsgemäßen Klemmkontaktierung ist eine sichere Kontaktgabe und mechanische Stabilität der Verbindung gewährleistet, die nicht vom Geschick einer Fachkraft (bei der Wahl der richtigen Löttemperatur und Lötzeit) abhängt. Vielmehr eignet sich diese Ausführung zur automatisierten, maschinellen Herstellung praktisch ohne Ausschuß und damit ganz besonders für Verbindungen an Serienbauteilen wie z.B. heizbaren Scheiben, Scheibenantennen, Solarzellen, Displays oder Scheiben mit leitenden Flächen für Alarmeinrichtungen. Dies gilt sowohl für die Herstellung und Befestigung des Kontakthalters als auch für die Fertigung und das Einbringen des Kontaktteils sowie dessen Anschluß an die Anschlußleitung durch Löten, Crimpen oder Schweißen.
Die Kontaktsicherheit ist dabei durch entsprechende Wahl der Größe des Kontaktdrucks und der Kontaktfläche sowie des Materials des Kontaktteils auf einfache Weise den Erfordernissen des Einzelfalls anpaßbar.
Beispielsweise wird für die bei Fahrzeug-Heckscheibenheizungen fließenden hohen Ströme das Kontaktteil mit einer großen, auf der Sammelschiene aufliegenden Platte aus gut leitendem Material (Kupfer) ausgestattet.This object is achieved by the characterizing features of claim 1.
With the clamp contacting according to the invention, reliable contacting and mechanical stability of the connection is ensured, which is not due to the skill of a specialist (when choosing the correct soldering temperature and Soldering time) depends. Rather, this version is suitable for automated, mechanical production practically without rejects and therefore very particularly for connections to series components such as heated panes, pane antennas, solar cells, displays or panes with conductive surfaces for alarm devices. This applies both to the manufacture and attachment of the contact holder and to the manufacture and insertion of the contact part and its connection to the connecting line by soldering, crimping or welding.
The contact reliability can be easily adapted to the requirements of the individual case by appropriate choice of the size of the contact pressure and the contact area and the material of the contact part.
For example, for the high currents flowing in vehicle rear window heaters, the contact part is equipped with a large plate made of highly conductive material (copper) resting on the busbar.

Die Aufteilung des Kontaktelements in ein Kontakt- und ein Halteteil ermöglicht voneinander weitgehend unabhängige Ausführungen dieser beiden Teile und somit eine Optimierung hinsichtlich ihrer Funktion. So kann z.B. das Halteteil auf die Scheibe aufgeklebt sein ohne die Kontaktierung zu beeinträchtigen. Auch ist die Wahl der Materialien jeweils ohne Einfluß auf das andere Teil.The division of the contact element into a contact and a holding part enables largely independent designs of these two parts and thus an optimization with regard to their function. For example, the holding part can be glued to the pane without impairing the contact. The choice of materials is also without influence on the other part.

Vorteilhafte Ausführungen bzw. Ausgestaltungen des Gegenstandes nach dem Hauptanspruch sind den Unteransprüchen zu entnehmen.
Bei einer Ausführung nach Anspruch 2 ist die Klemmkontaktierung durch wenigstens eine Klemmschraube realisiert, die zwar betätigt werden muß, andererseits aber einen beliebig hohen Kontaktdruck ermöglicht und damit insoweit eine Anpassung an die unterschiedlichsten Anforderungen ermöglicht.Advantageous embodiments of the object according to the main claim can be found in the subclaims.
In an embodiment according to claim 2, the clamping contact is realized by at least one clamping screw which, although it has to be actuated, on the other hand enables an arbitrarily high contact pressure and thus enables adaptation to the most varied requirements.

Als vorteilhafte Alternative ist in Anspruch 3 eine Kontaktierung mittels Federdruck vorgesehen. Dabei kann die Druckfeder ein gesondertes Teil sein, das beispielsweise um einen Dorn herum angeordnet ist. Ein wesentlich geringerer Aufwand ist demgegenüber erreicht, wenn gemäß den Ansprüchen 4 bis 6 die Druckfeder nicht lose, sondern entweder am Kontaktteil oder am Kontakthalter befestigt oder - sofern nicht unterschiedliche Materialien des eigentlichen Kontaktteils und der Feder erforderlich sind - mit dem Kontaktteil einstückig ist.As an advantageous alternative, contacting by means of spring pressure is provided in claim 3. The compression spring can be a separate part, which is arranged, for example, around a mandrel. A much lower effort is achieved when the compression spring is not loose, but is either attached to the contact part or to the contact holder or - unless different materials of the actual contact part and the spring are required - is in one piece with the contact part.

Besonders vorteilhaft ist eine Ausbildung des Kontaktelements nach Anspruch 7, bei der das Kontaktteil im Kontakthalter lösbar befestigt ist, sodaß im Falle von Reparaturen bzw. eines Auswechselns des Glasträgers die Zuleitung samt Kontaktteil nicht demontiert sondern nur vom Kontakthalter gelöst werden muß.A design of the contact element according to claim 7 is particularly advantageous, in which the contact part is detachably fastened in the contact holder, so that in the event of repairs or a replacement of the glass carrier, the supply line including the contact part does not have to be dismantled but only has to be detached from the contact holder.

Für viele Anwendungsfälle ist eine möglichst geringe Dicke des Kontaktelements gefordert. Dafür ist eine Ausführung nach Anspruch 8 besonders geeignet, weil sie eine minimale Höhe über dem Glasträger ermöglicht.The smallest possible thickness of the contact element is required for many applications. An embodiment according to claim 8 is particularly suitable for this because it enables a minimal height above the glass support.

Eine lösbare Befestigung gemäß Anspruch 9 weist den Vorteil auf, daß zum Herstellen der Befestigung keinerlei Maßnahmen nötig sind, da die Verrastung beim Zusammenfügen von Kontaktteil und -halter automatisch erfolgt, und daß zum Lösen der Verrastung lediglich ein einfacher Handgriff erforderlich ist, nämlich das Herausdrücken einer Rastnase aus einem Rastvorsprung. Diese Rastelemente können im Prinzip beliebig am Kontakthalter und Kontaktteil bzw. an der Druckfeder angebracht sein. Besonders einfach ist es jedoch, wenn die mit dem Kontaktteil einstückige oder daran befestigte Druckfeder mit dem freien Endteil einen Vorsprung des Kontakthalters hintergreift.A releasable fastening according to claim 9 has the advantage that no measures are necessary to produce the fastening, since the locking takes place automatically when the contact part and holder are put together, and that only a simple operation is required to release the locking, namely the pushing out a locking lug from a locking projection. In principle, these locking elements can be attached to the contact holder and contact part or to the compression spring. However, it is particularly simple if the compression spring, which is integral with or attached to the contact part, engages behind a projection of the contact holder with the free end part.

Eine Ausbildung des Kontaktelements nach Anspruch 10 ist besonders vorteilhaft für Anwendungsfälle, in denen die Anschlußleitung bereits mit einem Steckerstift konfektioniert ist und dann nur noch in die auf einfachste Weise gestaltete Buchse eingesteckt werden muß.An embodiment of the contact element according to claim 10 is particularly advantageous for applications in which the connecting line is already assembled with a plug pin and then only has to be plugged into the simplest socket.

Grundsätzlich kann der Kontakthalter, da er wie beschrieben unabhängig von den Eigenschaften des Kontaktteils ist, auf beliebige Weise am Glasträger befestigt sein. Eine besonders einfache und kostengünstige Art, die auch die üblicherweise in Fahrzeugen durch Rüttelbewegung auftretenden Belastungen aushält, ist in Anspruch 11 angegeben.
Diese mechanische Stabilität der Befestigung wird noch erhöht durch eine Ausführung des Kontakthalters aus Keramik (Anspruch 12), weil die temperaturabhängigen Ausdehnungskoeffizienten von Glas und Keramik ähnlich sind, sodaß die mechanischen Spannungen zwischen Kabelhalter und Glasträger auch bei starken Temperaturschwankungen so gering sind, daß sie die Festigkeit der Halterung nicht nennenswert beeinträchtigen.In principle, since it is independent of the properties of the contact part as described, the contact holder can be attached to the glass carrier in any manner. A particularly simple and inexpensive type, which also withstands the loads that usually occur in vehicles due to vibrating motion, is specified in claim 11.
This mechanical stability of the attachment is further increased by a design of the contact holder made of ceramic (claim 12), because the temperature-dependent expansion coefficients of glass and ceramic are similar, so that the mechanical stresses between the cable holder and the glass support are so low even with strong temperature fluctuations that they Do not significantly affect the strength of the bracket.

Die Erfindung ist nachstehend noch anhand zweier Ausführungsbeispiele eines Kontaktelements für einen Heckscheiben-Heizleiteranschluß in den Figuren erläutert, wobei gleich Teile mit gleichen Ziffern bezeichnet sind. Die Figuren 1 und 2 zeigen jeweils eine teilweise geschnittene perspektivische Ansicht eines ersten und eines zweiten Ausführungsbeispieles in Prinzipdarstellung.The invention is explained below with reference to two exemplary embodiments of a contact element for a rear window heating conductor connection in the figures, parts being identified with the same numbers. Figures 1 and 2 each show a partially sectioned perspective view of a first and a second embodiment in principle.

Bei beiden Ausführungsbeispielen ist ein Kontakthalter 1 aus Isolierstoff vorgesehen, der auf einer als Sammelschiene für Heizdrähte 2 ausgebildeten, auf einer Fahrzeug-Heckscheibe 3 aufgebrachten Metallfolie 4 aufgeklebt ist.
Der Kontakthalter 1 ist deckelartig geformt mit drei gleichen Randteilen 5, einem kürzeren anschlußseitigen Randteil 5' und einem Deckelteil 6. Die Randteile 5 sind mit ihren freien Bodenflächen 7 auf der Sammelschiene 4 aufgeklebt, wobei zwischen der Bodenfläche 7' des Randteils 5' und der Sammelschiene 4 eine Öffnung zur Einführung eines Kontaktteils verbleibt.In both exemplary embodiments, a contact holder 1 made of insulating material is provided, which is glued to a metal foil 4 which is designed as a busbar for heating wires 2 and is applied to a vehicle rear window 3.
The contact holder 1 is shaped like a lid with three identical edge parts 5, a shorter connection-side edge part 5 'and a cover part 6. The edge parts 5 are glued to the busbar 4 with their free bottom surfaces 7, the bottom part 7' of the edge part 5 'and the Busbar 4 remains an opening for the introduction of a contact part.

Bei der Ausführung des Kontaktelements gemäß Figur 1 ist das Kontaktteil 8 zweiteilig: es besteht aus einer Kupferplatte 9 und einer Blattfeder 10, die mit einem Endabschnitt 11 vom umgebördelten steckseitigen Endteil 12 der Kupferplatte 9 festgeklemmt ist und mit dem anderen, anschlagseitigen Endabschnitt 13 bei montiertem Kontaktelement unter Druck an der Innenfläche 14 des Deckelteils 6 anliegt. Auf dem anschlußseitigen Endteil 15 ist das abisolierte Ende 16 eines mit einem Isoliermantel 17 versehenen Kupfergeflechtbandes 18 angelötet.In the embodiment of the contact element according to Figure 1, the contact part 8 is in two parts: it consists of a copper plate 9 and a leaf spring 10, which is clamped with one end portion 11 of the flanged plug-side end part 12 of the copper plate 9 and with the other, stop-side end portion 13 when mounted Contact element rests under pressure on the inner surface 14 of the cover part 6. The stripped end 16 of a copper braid band 18 provided with an insulating jacket 17 is soldered onto the connection-side end part 15.

Zum Anschluß wird das mit dem Kuferband 18 versehene Kontaktteil 8 mit dem steckseitigen Endteil 12 voraus durch die stirnseitig trichterförmig erweiterte Öffnung zwischen der Bodenfläche 7' und der Sammelschiene 4 in den Kontakthalter 1 eingeschoben, wobei die Kupferplatte 9 durch den Druck der sich am Deckelteil 6 abstützenden Blattfeder 10 mit der gesamten Unterfläche an der Sammelschiene 4 anliegt und diese kontaktiert. In dieser Lage hintergreift zugleich die Stirnfläche des anschlußseitigen Endabschnitts 13 die Innenschulter 19 des anschlußseitigen Randteils 5' und ist dadurch absolut rüttelfest gegen ein Herausrutschen aus dem Kontakthalter 1 gesichert. Diese Verrastung ist jedoch auf einfache Weise durch Niederdrücken der Blattfeder 10 mittels eines durch eine Öffnung 20 des Deckelteils 6 hindurchgeführten stiftförmigen Gegenstandes (z.B. einer Schraubendreherklinge) wieder lösbar.For connection, the contact part 8 provided with the copper strip 18 is inserted with the plug-side end part 12 ahead through the funnel-shaped opening between the bottom surface 7 'and the busbar 4 into the contact holder 1, the copper plate 9 being pressed by the pressure on the cover part 6 supporting leaf spring 10 rests with the entire lower surface on the busbar 4 and contacts it. In this position, the end face of the connection-side end section 13 also engages behind the inner shoulder 19 of the connection-side edge part 5 'and is thereby secured against slipping out of the contact holder 1 in an absolutely vibration-proof manner. However, this latching is simple by pressing down the leaf spring 10 by means of a pin-shaped object (for example a screwdriver blade) passed through an opening 20 of the cover part 6.

Der Kontakthalter 1 ist im Druckgußverfahren sehr einfach und kostengünstig als Serienteil herstellbar. Darüberhinaus eignet sich auch das Kontaktteil 8 zur maschinellen Fertigung mit minimaler Ausschußquote, und zwar sowohl hinsichtlich der Herstellung der Kupferplatte 9 und der Blattfeder 10 sowie deren Klemmverbindung (Stanz-Biegeverfahren) als auch der Lötverbindung von Kupferplatte 9 und Kupferband 18.
Die Trennung in ein eigentliches Kontaktstück (Kupferplatte 9) und eine den Kontaktdruck erzeugende Blattfeder 10 ergibt darüberhinaus den Vorteil, daß das Material für diese Teile optimal den jeweiligen Erfordernissen angepaßt werden kann. So ist es im vorliegenden Ausführungsbeispiel möglich, das Kontaktelement dadurch für hohe Ströme auszulegen, daß das eigentliche Kontaktstück als Platte 9 aus gut leitendem Material (Kupfer) ausgebildet ist, die mittels einer starken, auf der gesamten Breite der Kupferplatte 8 wirkenden Blattfeder 10 aus Federblech großflächig an der zu kontaktierenden Sammelschiene 4 anliegt.The contact holder 1 is very simple and inexpensive to manufacture as a series part in the die casting process. In addition, the contact part 8 is also suitable for machine production with a minimum reject rate, both with regard to the production of the copper plate 9 and the leaf spring 10 and their clamp connection (stamping and bending method) and the soldered connection of the copper plate 9 and copper strip 18.
The separation into an actual contact piece (copper plate 9) and a leaf spring 10 generating the contact pressure also gives the advantage that the material for these parts can be optimally adapted to the respective requirements. Thus, in the present exemplary embodiment it is possible to design the contact element for high currents in that the actual contact piece is designed as a plate 9 made of highly conductive material (copper), the leaf spring 10 made of spring plate acting on the entire width of the copper plate 8 by means of a strong spring bears extensively on the busbar 4 to be contacted.

Bei der in Figur 2 dargestellten Ausführung eines erfindungsgemäßen Kontaktelements ist das Kontaktteil 21 ein ebenfalls praktisch ausschußfrei maschinell herstellbares einstückiges Stanz-Biegeteil aus Federblech, dessen im Kontakthalter 1 angeordneter Abschnitt aus einem Oberteil 22 und einem um 180 ° abgewinkelten, an der Sammelschiene 4 anliegenden Unterteil 23 besteht.
Aus dem Oberteil 22 ist eine als Druckfeder 24 wirkende Zunge ausgestanzt und derart herausgebogen, daß sie unter Druck an der Innenfläche 14 des Deckelteils 6 und zugleich mit ihrer freien Stirnkante an der Schulter 19 anliegt. Diese Rasthalterung ist auch hier sehr einfach mittels eines durch die Öffnung 20 auf die Druckfeder 24 zu drückenden stiftförmigen Gegenstandes lösbar.
Am anschlußseitigen Endteil 25 des Kontaktteils 21 ist die abisolierte Ader 26 eines mit einem Isoliermantel 27 versehenen Kabels 28 maschinell angelötet. Der Anschluß erfolgt in der bereits beim Ausführungsbeispiel gemäß Figur 1 beschriebenen Weise.In the embodiment of a contact element according to the invention shown in FIG. 2, the contact part 21 is also a one-piece stamped and bent part made of spring sheet metal, which can also be produced practically free of rejects, the section of which in the contact holder 1 consists of an upper part 22 and a lower part which is angled by 180 ° and bears against the busbar 4 23 exists.
A tongue acting as a compression spring 24 is punched out of the upper part 22 and bent out in such a way that it rests under pressure on the inner surface 14 of the cover part 6 and at the same time with its free end edge on the shoulder 19. This locking bracket is also very easily detachable here by means of a pin-shaped object to be pressed through the opening 20 onto the compression spring 24.
The stripped wire 26 of a cable 28 provided with an insulating jacket 27 is mechanically soldered to the connection-side end part 25 of the contact part 21. The connection is made in the manner already described in the exemplary embodiment according to FIG. 1.

Diese Ausführung zeichnet sich aufgrund des einteiligen Kontaktteils 21 durch eine noch kostengünstigere Herstellung aus und ist, da das Kontaktstück aus Federblech besteht, insbesondere für Anwendungsfälle mit nicht allzu hohen Strömen geeignet.Due to the one-piece contact part 21, this embodiment is characterized by an even more cost-effective production and, since the contact piece consists of spring plate, is particularly suitable for applications with currents that are not too high.

Claims (12)

Kontaktelement zum elektrischen und mechanischen Verbinden einer auf einem Glasträger aufgebrachten Kontaktfläche, insbesondere einer Sammelschiene für Fahrzeugscheiben-Heizleiter, mit einer Anschlußleitung,
dadurch gekennzeichnet, daß ein mit der Anschlußleitung (18, 28) verbundenes Kontaktteil (8, 21) in einem am Glasträger (3) befestigten Kontakthalter (1) angeordnet ist und unter Druck an der Kontaktfläche (4) anliegt.Contact element for the electrical and mechanical connection of a contact surface applied to a glass carrier, in particular a busbar for vehicle window heating conductors, with a connecting line,
characterized in that a contact part (8, 21) connected to the connecting line (18, 28) is arranged in a contact holder (1) fastened to the glass carrier (3) and rests under pressure on the contact surface (4). Kontaktelement nach Anspruch 1, dadurch gekennzeichnet, daß der Kontakthalter wenigstens eine das Kontaktteil gegen die Kontaktfläche drückende Klemmschraube aufweist.Contact element according to claim 1, characterized in that the contact holder has at least one clamping screw pressing the contact part against the contact surface. Kontaktelement nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine Druckfeder (10, 24) zwischen Kontakthalter (1) und Kontaktteil (8, 21) vorgesehen ist.Contact element according to claim 1, characterized in that at least one compression spring (10, 24) is provided between the contact holder (1) and the contact part (8, 21). Kontaktelement nach Anspruch 3, dadurch gekennzeichnet, daß die wenigstens eine Druckfeder (10) am Kontaktteil (9) befestigt ist.Contact element according to claim 3, characterized in that the at least one compression spring (10) is attached to the contact part (9). Kontaktelement nach Anspruch 3, dadurch gekennzeichnet, daß die wenigstens eine Druckfeder am Kontakthalter befestigt ist.Contact element according to claim 3, characterized in that the at least one compression spring is attached to the contact holder. Kontaktelement nach Anspruch 4, dadurch gekennzeichnet, daß die wenigstens eine Druckfeder (24) mit dem Kontaktteil (22, 23, 25) einstückig ist.Contact element according to claim 4, characterized in that the at least one compression spring (24) is in one piece with the contact part (22, 23, 25). Kontaktelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Kontaktteil (8, 21) im Kontakthalter (1) lösbar befestigbar ist.Contact element according to one of claims 1 to 6, characterized in that the contact part (8, 21) in the contact holder (1) is releasably attachable. Kontaktelement nach Anspruch 7, dadurch gekennzeichnet, daß das Kontaktteil (8, 21) in den Kontakthalter (1) parallel zur Kontaktfläche (4) einsteckbar ist.Contact element according to claim 7, characterized in that the contact part (8, 21) can be inserted into the contact holder (1) parallel to the contact surface (4). Kontaktelement nach Anspruch 7, dadurch gekennzeichnet, daß das Kontaktteil (8, 21) im Kontakthalter (1) lösbar rastend befestigt ist.Contact element according to claim 7, characterized in that the contact part (8, 21) is detachably fastened in the contact holder (1). Kontaktelemten nach Anspruch 3, dadurch gekennzeichnet, daß die Druckfeder das Kontaktteil bildet und zwischen der Druckfeder und dem Kontakthalter eine Steckbuchse zur Aufnahme eines mit der Anschlußleitung verbundenen Steckerstifts gebildet ist.Contact elements according to claim 3, characterized in that the compression spring forms the contact part and between the compression spring and the contact holder a socket is formed for receiving a connector pin connected to the connecting line. Kontaktelement nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Kontakthalter (1) auf dem Glasträger (3) und/oder der Kontaktfläche (4) aufgeklebt ist.Contact element according to one of claims 1 to 10, characterized in that the contact holder (1) is glued to the glass carrier (3) and / or the contact surface (4). Kontaktelement nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der Kontakthalter (1) aus keramischem Material besteht.Contact element according to one of claims 1 to 11, characterized in that the contact holder (1) consists of ceramic material.
EP94110937A 1993-07-17 1994-07-14 Contact element Expired - Lifetime EP0634882B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9310699U 1993-07-17
DE9310699U DE9310699U1 (en) 1993-07-17 1993-07-17 Contact element

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EP0634882A2 true EP0634882A2 (en) 1995-01-18
EP0634882A3 EP0634882A3 (en) 1995-07-12
EP0634882B1 EP0634882B1 (en) 1999-02-17

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EP94110937A Expired - Lifetime EP0634882B1 (en) 1993-07-17 1994-07-14 Contact element

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EP (1) EP0634882B1 (en)
DE (2) DE9310699U1 (en)
ES (1) ES2127853T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU717353B3 (en) * 1999-03-16 2000-03-23 Tyco Electronics Pty Limited Improved flat panel connector
GB2357638A (en) * 1999-12-24 2001-06-27 Pilkington Plc An electrical terminal for a window
WO2008134669A1 (en) * 2007-04-26 2008-11-06 Exatec, Llc Mechanical attachment of electrical terminals to plastic glazings
US9472875B2 (en) 2011-11-25 2016-10-18 Japan Aviation Electronics Industry, Ltd. Wire-to-board connector
US20210121968A1 (en) * 2018-03-22 2021-04-29 Central Glass Company, Limited Method of producing a vehicle glass assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003302259A1 (en) * 2002-11-28 2004-06-18 Asahi Glass Company, Limited Electrical connection structure for conductor formed on glass surface

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1104595A (en) * 1953-05-27 1955-11-22 Saint Gobain Electrical connections for resistance elements on glass plates
US3117829A (en) * 1960-06-23 1964-01-14 Minnesota Mining & Mfg Terminal plug and block
DE1190074B (en) * 1961-06-06 1965-04-01 Lucas Industries Ltd Cable lug for connecting an electrical resistance conductor
DE3841351A1 (en) * 1988-12-08 1990-06-13 Philips Patentverwaltung Connecting device for flat components
FR2646968A1 (en) * 1989-05-12 1990-11-16 Boyeldieu Andre Connection device for a circuit for heating and demisting a mirror glass

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1104595A (en) * 1953-05-27 1955-11-22 Saint Gobain Electrical connections for resistance elements on glass plates
US3117829A (en) * 1960-06-23 1964-01-14 Minnesota Mining & Mfg Terminal plug and block
DE1190074B (en) * 1961-06-06 1965-04-01 Lucas Industries Ltd Cable lug for connecting an electrical resistance conductor
DE3841351A1 (en) * 1988-12-08 1990-06-13 Philips Patentverwaltung Connecting device for flat components
FR2646968A1 (en) * 1989-05-12 1990-11-16 Boyeldieu Andre Connection device for a circuit for heating and demisting a mirror glass

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU717353B3 (en) * 1999-03-16 2000-03-23 Tyco Electronics Pty Limited Improved flat panel connector
GB2357638A (en) * 1999-12-24 2001-06-27 Pilkington Plc An electrical terminal for a window
GB2357638B (en) * 1999-12-24 2004-02-04 Pilkington Plc An electrical terminal for a window
WO2008134669A1 (en) * 2007-04-26 2008-11-06 Exatec, Llc Mechanical attachment of electrical terminals to plastic glazings
EP2140728B2 (en) † 2007-04-26 2014-06-18 Exatec, LLC. Mechanical attachment of electrical terminals to plastic glazings
US9018564B2 (en) 2007-04-26 2015-04-28 Exatec Llc Mechanical attachment of electrical terminals to plastic glazings
US9472875B2 (en) 2011-11-25 2016-10-18 Japan Aviation Electronics Industry, Ltd. Wire-to-board connector
US20210121968A1 (en) * 2018-03-22 2021-04-29 Central Glass Company, Limited Method of producing a vehicle glass assembly

Also Published As

Publication number Publication date
EP0634882B1 (en) 1999-02-17
DE59407823D1 (en) 1999-03-25
EP0634882A3 (en) 1995-07-12
DE9310699U1 (en) 1993-09-02
ES2127853T3 (en) 1999-05-01

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