EP0481993A1 - Contact device for a changer relay. - Google Patents

Contact device for a changer relay.

Info

Publication number
EP0481993A1
EP0481993A1 EP89911776A EP89911776A EP0481993A1 EP 0481993 A1 EP0481993 A1 EP 0481993A1 EP 89911776 A EP89911776 A EP 89911776A EP 89911776 A EP89911776 A EP 89911776A EP 0481993 A1 EP0481993 A1 EP 0481993A1
Authority
EP
European Patent Office
Prior art keywords
contact
switching
connecting line
pieces
free end
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
EP89911776A
Other languages
German (de)
French (fr)
Other versions
EP0481993B1 (en
Inventor
Horst Dipl-Ing Hendel
Josef Kern
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0481993A1 publication Critical patent/EP0481993A1/en
Application granted granted Critical
Publication of EP0481993B1 publication Critical patent/EP0481993B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H11/043—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by resistance welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H2011/047—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion on both sides of the contact body portion

Definitions

  • the invention relates to a contact arrangement for a changeover relay with at least two switch contact pieces, which are arranged on both sides at a free end of a movable contact spring, and with an electrical connecting line, one end of which is directly connected in an electrically conductive manner to a switch contact piece.
  • a movable contact spring between two counter contacts is provided at its free end with two switch contacts arranged on both sides.
  • the first switching contact piece arranged on one side of the movable contact spring is directly connected to an electrical connecting line designed as a copper wire, so that the contact spring itself does not conduct the current to be switched.
  • the latter is so long that it exceeds the width of the free end of the movable contact spring.
  • the width of the second switching contact piece arranged on the other side of the free end of the contact spring corresponds approximately to the width of the free end of the contact spring.
  • this comparatively short switching contact piece is either welded to the contact spring or connected to the first comparatively long switching contact piece by means of an attachment.
  • the current to be switched flows in each contact-making position of the contact spring via the long switching contact piece, so that it experiences greater heating compared to the short switching contact piece. If the current to be switched flows to the short switch contact piece, it has to pass through at least two connections. However, each connection represents an increased ohmic resistance, which causes an electrical power loss.
  • the differently designed switch contact pieces lead to an unsymmetrical mass distribution, which is characterized in particular by an unfavorable dynamic behavior during the switching processes, e.g. B. in an increased tendency to bounce, noticeable.
  • the known contact arrangement requires a precious metal requirement which is significantly increased compared to the precious metal requirement required for the pure contacting surfaces of the switching contact pieces.
  • the manufacture and processing of switching contact pieces of different lengths further increases the manufacturing costs for the known contact arrangement.
  • the object of the invention is to provide a contact arrangement with significantly improved operating behavior while at the same time reducing the production costs.
  • the approximately identical design of the switch contact pieces results in a significantly more favorable, d. H. more uniform mass distribution in the area of the free end of the contact spring.
  • Switch contact pieces has an approach which is electrically conductively connected to one end of the electrical connecting line.
  • a defined area for the formation of the electrically conductive connection is advantageously created, and, on the other hand, the thickness of the contact spring can be bridged through this approach.
  • a further advantageous development of the contact arrangement according to the invention consists in the fact that one end of the electrical connecting line has an extension which is electrically conductively connected to the at least one further switching contact piece.
  • Such an embodiment of the contact arrangement according to the invention has the advantage that switch contact pieces of completely identical design are used; due to the increased number of identical switch contact pieces, this is economically advantageous.
  • the attachment of one end of the electrical connection line can be produced, for example, by pressing after the one end of the electrical connection line has been compressed in a welding process. It is also conceivable that both the second switching contact piece and the one end of the electrical connecting line each have lugs, the sum of which corresponds to the thickness of the contact spring.
  • a further advantageous development of the contact arrangement according to the invention provides that the extension extends through a recess in the free end of the contact spring. With such a recess, the positioning of the approach is advantageously simplified, so that overall a higher manufacturing quality can be achieved.
  • An advantageous development of the contact arrangement according to the invention provides that the extension is fastened in the recess. So that during the manufacturing process formed between the element having the approach - namely the one end of the electrical connection line and / or the second switching contact piece - and the contact spring, a structural unit, which is advantageous for example in terms of handling during manufacture.
  • a further advantageous development of the contact arrangement according to the invention consists in the fact that the electrically conductive connections are welded connections and the switch contact pieces have a plating which improves the welding behavior in the region of their welding zones.
  • the mechanical quality and the conductivity of the welded connection between the respective switch contact pieces and the one end of the electrical connecting line is further improved, as a result of which a reduction in the ohmic resistance in these areas is achieved and thus the heating of the switch contact pieces or the entire contact arrangement during the current to be switched flows, is further reduced.
  • the contact arrangement according to the invention is characterized overall by a considerable reduction in the masses to be moved during the switching operations, which on the one hand has a favorable effect on the dynamic behavior of the contact arrangement and on the other hand requires lower driving forces.
  • FIG. 1 shows a contact arrangement designed according to the invention
  • FIG. 2 details of the design of the free end of the contact spring with the switching contact pieces
  • Fig. 3 shows a section through Figure 2 in the area of
  • Switch contact pieces Details of a further embodiment of the free end of the contact spring with the two switch contact pieces and
  • Fig. 5 shows a section in Figure 4 in the area of Switch contact pieces.
  • the contact arrangement shown schematically in FIG. 1 is part of a relay, as is generally described for example in the German utility model 83 25 986 with its magnet system.
  • a contact spring 2 is fastened to an armature 1, which is indicated as an indication.
  • the contact spring 2 has a free end 3, which serves as a center contact spring in a changeover relay.
  • the contact spring 2 or its free end 3 takes two stable positions depending on the position of the armature 1. In the first stable position (shown in FIG. 1), a mating contact element 4 forms a closed electrical contact with a switching contact piece 5. In the second stable position of the free end 3 of the contact spring 2, a second switching contact piece 6 forms a closed electrical contact with a further counter contact element 7 (FIG. 1 shows this contact in the open state).
  • connection elements 12 and 13 are each connected to connection elements 12 and 13, respectively, which emerge as external connections through a base of the changeover relay, which is not shown in FIG.
  • the area of the free end 3 of the contact spring 2 is shown in an exploded view in FIG.
  • One end 8 of the electrical connecting line 9 has been compressed in a welding process and has a plate-like shape.
  • the connecting line 9 is the rectangular switch contact piece 5, which is clad with a thin silver layer 20 on its surface facing the one end 8.
  • the free end 3 of the contact spring 2 has a recess 21, through which an attachment 22 of the rivet-like switching contact piece 6 extends in the joined state.
  • the end face of the extension 22 is also with a
  • FIG. 3 shows a section through FIG. 2 in the area of the switch contact pieces in the joined state. Due to the plating with the silver layers 20 and 23, after the switching contact pieces 5 and 6 have been joined, a large-area, high-quality welded connection with the one end 8 of the electrical connecting line 9 results, so that a largely low-loss current flow between the electrical connecting line 9 and the respective contact-forming Switch contact piece 5 or 6 takes place. A largely symmetrical distribution of the total mass can be seen in the area of the switching contact pieces 5 and 6.
  • the current to be switched flows via the connecting element 11, via the electrical connecting line 9 one end 8 of the electrical connecting line and the (only) electrical connection between the one end 8 and the switching contact piece 5 and via the connecting element 12 (see Fig. 1).
  • the current to be switched in the second stable position of the contact spring 2 covers a corresponding path via the (only) electrical connection of the switching contact piece 6 with one end 8 of the electrical connecting line 9 to the connecting element 13.
  • FIG. 4 A further detail of the contact arrangement is shown in an exploded view in FIG. 4, in which a switch contact piece 40 and a second switch contact piece 41 are of identical design. Between the switch contact pieces 40 and 41 there is an end 42 of an electrical connecting line 43, which is provided with an extension 44 by corresponding embossing during compression. The approach 44 is 45 in its height to the thickness of the free end 3 of the contact spring 2 and 46 in its diameter to the diameter of the Recess 21 matched. Surfaces 47 and 48 of the switching contact pieces 40 and 41 facing one end 42 of the electrical connecting line 43 are equipped with a welding aid in the form of a silver-containing layer.
  • the elements described in connection with FIG. 4 are shown in section in the assembled state.
  • the projection 44 is connected to the recess 21 of the contact spring 2 by a riveting process before the connection between the switching contact pieces 40 and 41 with the one end 42 of the electrical connecting line 43 or the projection 44 is produced by welding.
  • the switch contact pieces 40 and 41 can be separated from the same strip material in constant lengths, the strip material being able to consist, for example, of a copper alloy coated with a noble metal on one side (contact surface) which is already coated on its other side with the welding aid.
  • the similar design of the switching contact pieces 40 and 41 also results in a particularly symmetrical design of the contact arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)
  • Push-Button Switches (AREA)
  • Manufacture Of Switches (AREA)
  • Relay Circuits (AREA)

Abstract

Un dispositif de contact pour inverseur présente un ressort mobile de contact (2), à l'extrémité libre (3) duquel sont disposés sur les deux faces des contacts de commutation (5, 6), le courant à établir étant amené à ces contacts de commutation (5, 6) par un conducteur d'alimentation électrique (9). Pour que les masses soient réparties de manière aussi symétrique que possible au niveau de l'extrémité libre (3) du ressort de contact (2) et pour que le courant à établir soit amené aux contacts de commutation (5, 6) avec un minimum de pertes, il est prévu que ces contacts de commutation (5, 6) soient reliés directement par une liaison électriquement conductrice à une extrémité (8) du conducteur électrique (9). A cet effet, une extrémité (8) du conducteur électrique (9) ou un contact de commutation (5, 6) présentent de préférence un épaulement dont la face frontale forme une surface d'assemblage servant à établir la liaison électriquement conductrice.A contact device for an inverter has a movable contact spring (2), at the free end (3) of which switching contacts (5, 6) are arranged on both sides, the current to be established being supplied to these contacts. switch (5, 6) by a power supply conductor (9). In order for the masses to be distributed as symmetrically as possible at the free end (3) of the contact spring (2) and for the current to be made to be supplied to the switching contacts (5, 6) with a minimum losses, provision is made for these switching contacts (5, 6) to be connected directly by an electrically conductive link to one end (8) of the electrical conductor (9). For this purpose, one end (8) of the electrical conductor (9) or a switching contact (5, 6) preferably has a shoulder, the front face of which forms an assembly surface serving to establish the electrically conductive connection.

Description

Kontaktanordnung für ein Wechsler-Relais Contact arrangement for a changeover relay

Die Erfindung bezieht sich auf eine Kontaktanordnung für ein Wechsler-Relais mit mindestens zwei Schaltkontaktstücken, die beidseitig an einem freien Ende einer bewegbaren Kontaktfeder angeordnet sind, und mit einer elektrischen Aπschlußleitung, deren eines Ende mit einem Schaltkontaktstück unmittelbar elektrisch leitend verbunden ist.The invention relates to a contact arrangement for a changeover relay with at least two switch contact pieces, which are arranged on both sides at a free end of a movable contact spring, and with an electrical connecting line, one end of which is directly connected in an electrically conductive manner to a switch contact piece.

Bei einer derartigen bekannten Kontaktanordnung (EP-A-01 67 668) für ein Wechsler-Relais hoher Schaltleistung ist eine zwischen zwei Gegenkontaktele enten bewegbare Kontaktfeder an ihrem freien Ende mit zwei beidseitig angeordneten Schaltkontakt stücken versehen. Das auf der einen Seite der bewegbaren Kon- taktfeder angeordnete erste Schaltkontaktstück ist unmittelbar mit einer als Kupferlitze ausgebildeten elektrischen Anschlu߬ leitung verbunden, so daß die Kontaktfeder selbst den zu schal¬ tenden Strom nicht führt. Um eine für die Verbindung der elek¬ trischen Anschlußleitung mit dem ersten Schaltkontaktstück ausreichende Kontaktierungsfläche zu schaffen, ist dieses so lang ausgebildet, daß es die Breite des freien Endes der be¬ wegbaren Kontaktfeder übersteigt. Das auf der anderen Seite des freien Endes der Kontaktfeder angeordnete zweite Schalt¬ kontaktstück entspricht in seiner Breite annähernd der Breite des freien Endes der Kontaktfeder. Dieses vergleichsweise kurze Schaltkoπtaktstück ist bei der bekannten Kontaktanordnung ent¬ weder mit der Kontaktfeder verschweißt oder mittels eines An¬ satzes mit dem ersten vergleichsweise langen Schaltkontaktstück verbunden. Bei beiden Varianten fließt der zu schaltende Strom in jeder kontaktgebenden Stellung der Kontaktfeder über das lange Schaltkontaktstück, so daß dieses, verglichen mit dem kurzen Schaltkontaktstück eine stärkere Erwärmung erfährt. Fließt der zu schaltende Strom zu dem kurzen Schaltkontakt¬ stück, so hat er mindestens zwei Verbindungen zu passieren. Jede Verbindung stellt aber einen erhöhten ohmschen Widerstand dar, der eine elektrische Verlustleistung verursacht. Die unterschiedlich ausgebildeten Schaltkontaktstücke führen zu einer unsymmetrischen Masseverteilung, die sich insbesondere durch ein ungünstiges dynamisches Verhalten während der Schalt¬ vorgänge, z. B. in einer verstärkten Prellneigung, bemerkbar macht. Durch das lange Schaltkontaktstück erfordert die bekann¬ te Kontaktanordnung einen Edelmetallbedarf, der im Vergleich zu dem für die reinen kontaktgebenden Flächen der Schaltkontakt¬ stücke erforderlichen Edelmetallbedarf wesentlich erhöht ist. Die Herstellung und Verarbeitung unterschiedlich langer Schalt- kontaktstücke erhöht weiterhin die Herstellungskosten für die bekannte Kontaktanordnung.In such a known contact arrangement (EP-A-01 67 668) for a changeover relay with high switching capacity, a movable contact spring between two counter contacts is provided at its free end with two switch contacts arranged on both sides. The first switching contact piece arranged on one side of the movable contact spring is directly connected to an electrical connecting line designed as a copper wire, so that the contact spring itself does not conduct the current to be switched. In order to create an adequate contacting area for the connection of the electrical connecting line to the first switching contact piece, the latter is so long that it exceeds the width of the free end of the movable contact spring. The width of the second switching contact piece arranged on the other side of the free end of the contact spring corresponds approximately to the width of the free end of the contact spring. In the known contact arrangement, this comparatively short switching contact piece is either welded to the contact spring or connected to the first comparatively long switching contact piece by means of an attachment. In both variants, the current to be switched flows in each contact-making position of the contact spring via the long switching contact piece, so that it experiences greater heating compared to the short switching contact piece. If the current to be switched flows to the short switch contact piece, it has to pass through at least two connections. However, each connection represents an increased ohmic resistance, which causes an electrical power loss. The differently designed switch contact pieces lead to an unsymmetrical mass distribution, which is characterized in particular by an unfavorable dynamic behavior during the switching processes, e.g. B. in an increased tendency to bounce, noticeable. Due to the long switching contact piece, the known contact arrangement requires a precious metal requirement which is significantly increased compared to the precious metal requirement required for the pure contacting surfaces of the switching contact pieces. The manufacture and processing of switching contact pieces of different lengths further increases the manufacturing costs for the known contact arrangement.

Aufgabe der Erfindung ist es, einer Kontaktanordnung ein wesentlich verbessertes Betriebsverhalten bei gleichzeitiger Senkung der Herstellungskosten zu verleihen.The object of the invention is to provide a contact arrangement with significantly improved operating behavior while at the same time reducing the production costs.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß bei der Kontaktanordnugn der eingangs genannten Art eine unmittelbare elektrisch leitende Verbindung der weiteren Schaltkontaktstücke mit dem einen Ende der elektrischen Anschlußleitung besteht. Ein Vorteil der Erfindung besteht darin, daß der zu schaltende Strom in jeder kontaktgebenden Stellung der Kontaktfeder über nur eine einzige Fügestelle bzw. elektrische Verbindung zu dem jeweiligen Schaltkontaktstück fließt. Weil für jedes Schalt- kontaktstück nur noch die Kontaktfläche zur jeweiligen Verbin¬ dung mit dem einen Ende der elektrischen Anschlußleitung vor¬ zusehen ist, wird der erforderliche Edelmetallbedarf des ersten Schaltkontaktstückes erheblich vermindert und eine ungleich¬ mäßige Erwärmung der beiden Schaltkontaktstücke der erfindungs- gemäßen Kontaktanordnung in vorteilhafter Weise vermieden.This object is achieved in that in the Kontaktanordnugn of the type mentioned there is a direct electrically conductive connection of the further switch contact pieces with one end of the electrical connection line. An advantage of the invention is that the current to be switched flows in each contact-making position of the contact spring via only a single joint or electrical connection to the respective switch contact piece. Because only the contact surface for the respective connection to the one end of the electrical connecting line is to be provided for each switching contact piece, the required precious metal requirement of the first switching contact piece is considerably reduced and an uneven heating of the two switching contact pieces of the contact arrangement according to the invention avoided in an advantageous manner.

Außerdem ergibt sich durch die annähernd gleiche Ausbildung der Schaltkontaktstücke eine wesentlich günstigere, d. h. gleich¬ mäßigere Massenverteilung im Berreich des freien Endes der Kontaktfeder.In addition, the approximately identical design of the switch contact pieces results in a significantly more favorable, d. H. more uniform mass distribution in the area of the free end of the contact spring.

Eine vorteilhafte Fortbildung der er findungsgemäßen Kontakt - anordnung sieht vor, daß zumindest eines der weiterenAn advantageous development of the contact he invented - The arrangement provides that at least one of the others

Schaltkontaktstücke einen Ansatz aufweist, der mit dem einen Ende der elektrischen Anschlußleituπg elektrisch leitend verbunden ist. Mit einem derartigen Ansatz ist einerseits in vorteilhafter Weise ein definierter Bereich zur Bildung der elektrisch leitenden Verbindung geschaffen, und andererseits kann durch diesen Ansatz gegebenenfalls die Dicke der Kontaktfeder überbrückt werden.Switch contact pieces has an approach which is electrically conductively connected to one end of the electrical connecting line. With such an approach, on the one hand, a defined area for the formation of the electrically conductive connection is advantageously created, and, on the other hand, the thickness of the contact spring can be bridged through this approach.

Eine weitere vorteilhafte Fortbildung der erfindungsgemäßen Kontaktanordnung besteht darin, daß das eine Ende der elek¬ trischen Anschlußleitung einen Ansatz aufweist, der mit dem mindestens einen weiteren Schaltkontaktstück elektrisch leitend verbunden ist. Eine derartige Ausgestaltung der erfindungs- gemäßen Kontaktanordnung hat den Vorteil, daß vollständig gleichartig ausgeführte Schaltkontaktstücke Verwendung finden; dies ist aufgrund der so erhöhten Stückzahlen identischer Schaltkontaktstücke in wirtschaftlicher Hinsicht günstig. Der Ansatz des einen Endes der elektrischen Anschlußleitung kann beispielsweise durch Anpragen hergestellt werden, nachdem das eine Ende der elektrischen Anschlußleitung in einem Schwei߬ vorgang verdichtet wurde. Es ist auch denkbar, daß sowohl das zweite Schaltkontaktstück als auch das eine Ende der elek¬ trischen Anschlußleitung jeweils Ansätze aufweisen, deren Summe der Dicke der Kontaktfeder entspricht.A further advantageous development of the contact arrangement according to the invention consists in the fact that one end of the electrical connecting line has an extension which is electrically conductively connected to the at least one further switching contact piece. Such an embodiment of the contact arrangement according to the invention has the advantage that switch contact pieces of completely identical design are used; due to the increased number of identical switch contact pieces, this is economically advantageous. The attachment of one end of the electrical connection line can be produced, for example, by pressing after the one end of the electrical connection line has been compressed in a welding process. It is also conceivable that both the second switching contact piece and the one end of the electrical connecting line each have lugs, the sum of which corresponds to the thickness of the contact spring.

Eine weitere vorteilhafte Fortbildung der erfindungsgemäßen Kontaktanordnung sieht vor, daß der Ansatz durch eine Aus¬ nehmung in dem freien Ende der Kontaktfeder hindurchgreift. Mit einer derartigen Ausnehmung ist in vorteilhafter Weise die Positionierung des Ansatzes vereinfacht, so daß insgesamt eine höhere Fertigungsqualität erreichbar ist.A further advantageous development of the contact arrangement according to the invention provides that the extension extends through a recess in the free end of the contact spring. With such a recess, the positioning of the approach is advantageously simplified, so that overall a higher manufacturing quality can be achieved.

Eine vorteilhafte Weiterbildung der erfindungsgemäßen Kontaktanordnung sieht vor, daß der Ansatz in der Ausnehmung befestigt ist. Damit wird während des Fertigungsprozesses zwischen dem den Ansatz aufweisenden Element - nämlich dem einen Ende der elektrischen Anschlußleitung und/oder dem zweiten Schaltkontaktstück - und der Kontaktfeder eine bauliche Einheit gebildet, die beispielsweise im Hinblick auf die Handhabung während der Fertigung vorteilhaft ist.An advantageous development of the contact arrangement according to the invention provides that the extension is fastened in the recess. So that during the manufacturing process formed between the element having the approach - namely the one end of the electrical connection line and / or the second switching contact piece - and the contact spring, a structural unit, which is advantageous for example in terms of handling during manufacture.

Eine weitere vorteilhafte Weiterbildung der erfindungsgemäßen Kontaktanordnung besteht darin, daß die elektrisch leitenden Verbindungen Schweißverbindungen sind und die Schaltkontakt- stücke im Bereich ihrer Schweißzonen eine das Schweißverhalten verbessernde Plattierung aufweisen. Auf diese Weise wird die mechanische Güte und die Leitfähigkeit der Schweißverbindung zwischen den jeweiligen Schaltkontaktstücken und dem einen Ende der elektrischen Anschlußleitung weiter verbessert, wodurch eine Verminderung des ohmschen Widerstandes in diesen Bereichen erzielt und damit die Erwärmung der Schaltkontaktstücke bzw. der gesamten Kontaktanordnung, während der zu schaltende Strom fließt, weiter vermindert wird.A further advantageous development of the contact arrangement according to the invention consists in the fact that the electrically conductive connections are welded connections and the switch contact pieces have a plating which improves the welding behavior in the region of their welding zones. In this way, the mechanical quality and the conductivity of the welded connection between the respective switch contact pieces and the one end of the electrical connecting line is further improved, as a result of which a reduction in the ohmic resistance in these areas is achieved and thus the heating of the switch contact pieces or the entire contact arrangement during the current to be switched flows, is further reduced.

Die erfiπdungsgemäße Kontaktanordnung zeichnet sich insgesamt durch eine erhebliche Reduzierung der während der Schalt¬ vorgänge zu bewegenden Massen aus, was sich einerseits auf das dynamische Verhalten der Kontaktanordnung günstig auswirkt und andererseits geringere Antriebskräfte erforderlich macht.The contact arrangement according to the invention is characterized overall by a considerable reduction in the masses to be moved during the switching operations, which on the one hand has a favorable effect on the dynamic behavior of the contact arrangement and on the other hand requires lower driving forces.

Die Erfindung wird nachfolgend in Ausführungsbeispielen anhand der Zeichnung näher erläutert. Es zeigen: Fig. 1 eine erfindungsgemäß gestaltete Kontaktanordnung, Fig. 2 Einzelheiten der Gestaltung des freien Endes der Kontaktfeder mit den Schaltkontaktstücken,The invention is explained in more detail below in exemplary embodiments with reference to the drawing. 1 shows a contact arrangement designed according to the invention, FIG. 2 details of the design of the free end of the contact spring with the switching contact pieces,

Fig. 3 einen Schnitt durch die Figur 2 im Bereich derFig. 3 shows a section through Figure 2 in the area of

Schaltkontaktstücke, Fig. 4 Einzelheiten einer weiteren Ausgestaltungsmöglichkeit des freien Endes der Kontaktfeder mit den beiden Schaltkontaktstücken undSwitch contact pieces, Fig. 4 details of a further embodiment of the free end of the contact spring with the two switch contact pieces and

Fig. 5 einen Schnitt in der Figur 4 im Bereich der Schaltkontaktstücke.Fig. 5 shows a section in Figure 4 in the area of Switch contact pieces.

Die in der Figur 1 schematisch dargestellte Kontaktanordnung ist Teil eines Relais, wie es beispielsweise in dem deutschen Gebrauchsmuster 83 25 986 mit seinem Magnetsystem allgemein beschrieben ist. An einem andeutungsweise dargestellten Anker 1 ist eine Kontaktfeder 2 befestigt. Die Kontaktfeder 2 weist ein freies Ende 3 auf, das als Mittelkontaktfeder in einem Wechsler- Relais dient. Die Kontaktfeder 2 bzw. ihr freies Ende 3 nimmt je nach Stellung des Ankers 1 zwei stabile Stellungen ein. In der ersten stabilen Stellung (in der Figur 1 dargestellt) bildet ein Gegenkontaktelement 4 mit einem Schaltkontaktstück 5 einen geschlossenen elektrischen Kontakt. In der zweiten stabilen Stellung des freien Endes 3 der Kontaktfeder 2 bildet ein zweites Schaltkontaktstück 6 mit einem weiteren Gegen¬ kontaktelement 7 einen geschlossenen elektrischen Kontakt (Figur 1 zeigt diesen Kontakt in geöffnetem Zustand). Zwischen den Schaltkontaktstücken 5 und 6 befindet sich ein Ende 8 einer als Kupferlitze ausgebildeten elektrischen Anschlußleitung 9. Das weitere Ende 10 der elektrischen Anschlußleitung 9 ist mit einem Anschlußelement 11 verbunden. Auch die Gegenkoπtakt- elemente 4 und 7 sind jeweils mit Anschlußelementen 12 bzw. 13 verbunden, die durch einen in der Figur 1 nicht dargestellten Sockel des Wechsler-Relais als Außenanschlüsse austreten.The contact arrangement shown schematically in FIG. 1 is part of a relay, as is generally described for example in the German utility model 83 25 986 with its magnet system. A contact spring 2 is fastened to an armature 1, which is indicated as an indication. The contact spring 2 has a free end 3, which serves as a center contact spring in a changeover relay. The contact spring 2 or its free end 3 takes two stable positions depending on the position of the armature 1. In the first stable position (shown in FIG. 1), a mating contact element 4 forms a closed electrical contact with a switching contact piece 5. In the second stable position of the free end 3 of the contact spring 2, a second switching contact piece 6 forms a closed electrical contact with a further counter contact element 7 (FIG. 1 shows this contact in the open state). Between the switch contact pieces 5 and 6 there is an end 8 of an electrical connecting line 9 designed as a copper wire. The further end 10 of the electrical connecting line 9 is connected to a connecting element 11. The mating contact elements 4 and 7 are each connected to connection elements 12 and 13, respectively, which emerge as external connections through a base of the changeover relay, which is not shown in FIG.

In der Figur 2 ist der Bereich des freien Endes 3 der Kontakt¬ feder 2 in Explosionsdarstellung gezeigt. Das eine Ende 8 der elektrischen Anschlußleitung 9 ist in einem Schweißvorgaπg verdichtet worden und weist eine plattenförmige Gestalt auf. Auf der einen Seite des einen Endes 8 der elektrischenThe area of the free end 3 of the contact spring 2 is shown in an exploded view in FIG. One end 8 of the electrical connecting line 9 has been compressed in a welding process and has a plate-like shape. On one side of one end 8 of the electrical

Anschlußleitung 9 befindet sich das rechteckförmig ausgebildete Schaltkontaktstück 5, das auf seiner dem einen Ende 8 zuge¬ wandten Oberfläche mit einer dünnen Silberschicht 20 plattiert ist. Das freie Ende 3 der Kontaktfeder 2 weist eine Ausnehmung 21 auf, durch die im gefügten Zustand ein Ansatz 22 des nietartig ausgebildeten Schaltkontaktstücks 6 hindurchgreift. Die Stirnfläche des Ansatzes 22 ist ebenfalls mit einerThe connecting line 9 is the rectangular switch contact piece 5, which is clad with a thin silver layer 20 on its surface facing the one end 8. The free end 3 of the contact spring 2 has a recess 21, through which an attachment 22 of the rivet-like switching contact piece 6 extends in the joined state. The end face of the extension 22 is also with a

Silberschicht 23 plattiert.Silver layer 23 plated.

Fig. 3 zeigt einen Schnitt durch die Figur 2 im Bereich der Schaltkontaktstücke im gefügten Zustand. Durch die Plattierung mit den Silberschichten 20 bzw. 23 ergibt sich nach dem Fügen der Schaltkontaktstücke 5 und 6 eine großflächige, hochwertige Schweißverbindung mit dem einen Ende 8 der elektrischen Anschlußleitung 9, so daß eine weitgehend verlustarme Stromführung zwischen der elektrischen Anschlußleitung 9 und dem jeweiligen kontaktbildenden Schaltkontaktstück 5 bzw. 6 erfolgt. Im Bereich der Schaltkontaktstücke 5 und 6 erkennt man eine weitgehend symmetrische Verteilung der Gesamtmasse.FIG. 3 shows a section through FIG. 2 in the area of the switch contact pieces in the joined state. Due to the plating with the silver layers 20 and 23, after the switching contact pieces 5 and 6 have been joined, a large-area, high-quality welded connection with the one end 8 of the electrical connecting line 9 results, so that a largely low-loss current flow between the electrical connecting line 9 and the respective contact-forming Switch contact piece 5 or 6 takes place. A largely symmetrical distribution of the total mass can be seen in the area of the switching contact pieces 5 and 6.

Steht das Schaltkontaktstück 5 mit dem Gegenkontaktelement.4 in Verbindung (erste stabile Stellung der Kontaktfeder 2), so fließt der zu schaltende Strom über das Anschlußelement 11, über die elektrische Anschlußleitung 9 das eine Ende 8 der elektrischen Anschlußleitung und die (einzige) elektrische Verbindung zwischen dem einen Ende 8 und dem Schaltkontaktstück 5 und über das Anschlußelement 12 (siehe Fig. 1). In gleicher Weise legt der zu schaltende Strom bei der zweiten stabilen Stellung der Kontaktfeder 2 einen entsprechenden Weg über die (einzige) elektrische Verbindung des Schaltkontaktstücks 6 mit dem einen Ende 8 der elektrischen Anschlußleitung 9 zum An¬ schlußelement 13 zurück.Is the switching contact piece 5 with the mating contact element . 4 in connection (first stable position of the contact spring 2), the current to be switched flows via the connecting element 11, via the electrical connecting line 9 one end 8 of the electrical connecting line and the (only) electrical connection between the one end 8 and the switching contact piece 5 and via the connecting element 12 (see Fig. 1). In the same way, the current to be switched in the second stable position of the contact spring 2 covers a corresponding path via the (only) electrical connection of the switching contact piece 6 with one end 8 of the electrical connecting line 9 to the connecting element 13.

In der Figur 4 ist eine weitere Einzelheit der Kontakt¬ anordnung in Explosionsdarstellung gezeigt, bei der ein Schaltkontaktstück 40 und ein zweites Schaltkontaktstück 41 identisch ausgebildet sind. Zwischen den Schaltkontaktstücken 40 und 41 befindet sich ein Ende 42 einer elektrischen Anschlußleitung 43, das durch entsprechende Prägung beim Verdichten mit einem Ansatz 44 versehen ist. Der Ansatz 44 ist in seiner Höhe 45 auf die Dicke des freien Endes 3 der Kontakt¬ feder 2 und in seinem Durchmesser 46 auf den Durchmesser der Ausnehmung 21 abgestimmt. Dem einen Ende 42 der elektrischen Anschlußleitung 43 zugewandte Oberflächen 47 und 48 der Schalt¬ kontaktstücke 40 bzw. 41 sind mit einer Schweißhilfe in Form einer silberhaltigen Schicht ausgestattet.A further detail of the contact arrangement is shown in an exploded view in FIG. 4, in which a switch contact piece 40 and a second switch contact piece 41 are of identical design. Between the switch contact pieces 40 and 41 there is an end 42 of an electrical connecting line 43, which is provided with an extension 44 by corresponding embossing during compression. The approach 44 is 45 in its height to the thickness of the free end 3 of the contact spring 2 and 46 in its diameter to the diameter of the Recess 21 matched. Surfaces 47 and 48 of the switching contact pieces 40 and 41 facing one end 42 of the electrical connecting line 43 are equipped with a welding aid in the form of a silver-containing layer.

In der Figur 5 sind die im Zusammenhang mit der Figur 4 beschriebenen Elemente im zusammengefügten Zustand im Schnitt dargestellt. Der Ansatz 44 ist mit der Ausnehmung 21 der Kontaktfeder 2 durch eine Vorvernietung verbunden, bevor die Verbindung zwischen den Schaltkontaktstücken 40 und 41 mit dem einen Ende 42 der elektrischen Anschlußleitung 43 bzw. dem Ansatz 44 durch Verschweißen hergestellt wird. Bei diesem Ausführungsbeispiel können die Schaltkontaktstücke 40 und 41 von demselben Bandmaterial in gleichbleibenden Längen abge- trennt werden, wobei das Bandmaterial beispielsweise aus einer einseitig (Kontaktfläche) edelmetallbeschichteten Kupfer¬ legierung bestehen kann, die bereits auf ihrer anderen Seite mit der Schweißhilfe beschichtet ist. Durch die gleichartige Ausgestaltung der Schaltkontaktstücke 40 und 41 ergibt sich darüber hinaus eine besonders symmetrische Ausbildung der Kontaktanordnung. In FIG. 5, the elements described in connection with FIG. 4 are shown in section in the assembled state. The projection 44 is connected to the recess 21 of the contact spring 2 by a riveting process before the connection between the switching contact pieces 40 and 41 with the one end 42 of the electrical connecting line 43 or the projection 44 is produced by welding. In this exemplary embodiment, the switch contact pieces 40 and 41 can be separated from the same strip material in constant lengths, the strip material being able to consist, for example, of a copper alloy coated with a noble metal on one side (contact surface) which is already coated on its other side with the welding aid. The similar design of the switching contact pieces 40 and 41 also results in a particularly symmetrical design of the contact arrangement.

Claims

Patentansprüche Claims 1. Kontaktanordnung für ein Wechsler-Relais mit mindestens zwei Schaltkontaktstücken (5, 6), die beidseitig an einem freien Ende (3) einer bewegbaren Kontaktfeder (2) angeordnet sind, und mit einer elektrischen Anschlußleitung (9), deren eines Ende (8) mit einem ersten Schaltkontaktstück (5) unmittelbar elektrisch leitend verbunden ist, g e k e n n z e i c h n e t d u r c h eine unmittelbare elektrisch leitende Verbindung der weiteren Schaltkontaktstücke (6) mit dem einen Ende (8) der elektrischen Anschlußleitung (9). (Fig. 1)1. Contact arrangement for a changeover relay with at least two switching contact pieces (5, 6), which are arranged on both sides at a free end (3) of a movable contact spring (2), and with an electrical connection line (9), one end (8 ) is directly electrically connected to a first switch contact piece (5), characterized by a direct electrically conductive connection of the further switch contact pieces (6) to one end (8) of the electrical connecting line (9). (Fig. 1) 2. Kontaktanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß zumindest eines der weiteren Schaltkontaktstücke (6) einen Ansatz (22) aufweist, der mit dem einen Ende (8) der elektrischen Anschlußleitung (9) elektrisch leitend verbunden ist. (Fig. 2, Fig. 3)2. Contact arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t that at least one of the further switch contact pieces (6) has an approach (22) which is electrically conductively connected to one end (8) of the electrical connecting line (9). (Fig. 2, Fig. 3) 3. Kontaktanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß das eine Ende (42) der elektrischen Anschlußleitung (43) einen Ansatz (44) aufweist, der mit dem mindestens einen weiteren Schaltkontaktstück (40) elektrisch leitend verbunden ist. (Fig. 4, Fig. 5)3. Contact arrangement according to claim 1, so that the one end (42) of the electrical connecting line (43) has an extension (44) which is electrically conductively connected to the at least one further switching contact piece (40). (Fig. 4, Fig. 5) 4. Kontaktanordnung nach Anspruch 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , daß der Ansatz (22; 44) durch eine Ausnehmung (21) in dem freien Ende (3) der Kontaktfeder (2) hiπdurchgreift. (Fig. 3, Fig. 5)4. Contact arrangement according to claim 2 or 3, so that the approach (22; 44) through a recess (21) in the free end (3) of the contact spring (2) reaches through. (Fig. 3, Fig. 5) 5. Kontaktanordnung nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß der Ansatz (22, 44) in der Ausnehmung (21) befestigt ist. (Fig. 3, Fig. 5) 5. Contact arrangement according to claim 4, characterized in that the projection (22, 44) in the recess (21) is fixed. (Fig. 3, Fig. 5) 6. Kontaktanordnung nach einem der vorangehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die elektrisch leitenden Verbindungen Schweißverbindungen sind und daß die Schaltkontaktstücke (5, 6) im Bereich ihrer ■ Schweißzonen eine das Schweißverhalteπ verbessernde Plattierung (22, 23) aufweisen. (Fig. 3) 6. Contact arrangement according to one of the preceding claims, that the electrical connections are welded connections and that the switch contact pieces (5, 6) have a plating (22, 23) which improves the welding behavior in the area of their welding zones. (Fig. 3)
EP89911776A 1989-10-24 1989-10-24 Contact device for a changer relay Expired - Lifetime EP0481993B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1989/000689 WO1991006964A1 (en) 1989-10-24 1989-10-24 Contact device for a changer relay

Publications (2)

Publication Number Publication Date
EP0481993A1 true EP0481993A1 (en) 1992-04-29
EP0481993B1 EP0481993B1 (en) 1994-03-16

Family

ID=6835276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911776A Expired - Lifetime EP0481993B1 (en) 1989-10-24 1989-10-24 Contact device for a changer relay

Country Status (6)

Country Link
US (1) US5324901A (en)
EP (1) EP0481993B1 (en)
JP (1) JP2974704B2 (en)
AT (1) ATE103103T1 (en)
DE (1) DE58907255D1 (en)
WO (1) WO1991006964A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715115C2 (en) * 1997-04-11 2001-07-19 Aeg Niederspannungstech Gmbh Switching device
USD486797S1 (en) 2002-07-16 2004-02-17 Emerson Electric Co. Switch assembly
DE102008039704A1 (en) * 2008-08-26 2010-03-04 Tyco Electronics Amp Gmbh Contact arrangement with bent strand, relay with contact arrangement and method for mounting a relay
DE102008039705B4 (en) * 2008-08-26 2018-05-30 Te Connectivity Germany Gmbh Contact assembly for a relay, relay with contact assembly and method for mounting a relay
DE102014201533A1 (en) 2014-01-28 2015-07-30 Tyco Electronics Austria Gmbh Switching contact and method for its production

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US3339048A (en) * 1965-10-14 1967-08-29 Texas Instruments Inc Switch having improved multiple blade assembly
DE1665958A1 (en) * 1967-06-12 1971-04-08 Siemens Ag Heavy-duty contact arrangement
US3930211A (en) 1974-11-25 1975-12-30 Caribe Circuit Breaker Co Inc Circuit breaker
DE8325986U1 (en) * 1983-09-09 1983-12-29 Siemens AG, 1000 Berlin und 8000 München Electromagnetic relay
DE3473963D1 (en) * 1984-05-09 1988-10-13 Siemens Ag Contact arrangement for a relay with a high interrupting capacity

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Title
See references of WO9106964A1 *

Also Published As

Publication number Publication date
JPH05503803A (en) 1993-06-17
ATE103103T1 (en) 1994-04-15
US5324901A (en) 1994-06-28
JP2974704B2 (en) 1999-11-10
EP0481993B1 (en) 1994-03-16
WO1991006964A1 (en) 1991-05-16
DE58907255D1 (en) 1994-04-21

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