EP0234367B1 - Spring contact for an electrical plug-in connection rail - Google Patents

Spring contact for an electrical plug-in connection rail Download PDF

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Publication number
EP0234367B1
EP0234367B1 EP87101661A EP87101661A EP0234367B1 EP 0234367 B1 EP0234367 B1 EP 0234367B1 EP 87101661 A EP87101661 A EP 87101661A EP 87101661 A EP87101661 A EP 87101661A EP 0234367 B1 EP0234367 B1 EP 0234367B1
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EP
European Patent Office
Prior art keywords
contact spring
spring according
contact
circuit board
limbs
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.)
Expired - Lifetime
Application number
EP87101661A
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German (de)
French (fr)
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EP0234367A2 (en
EP0234367A3 (en
Inventor
Peter Seidel
Leo Ing. Pelz (Grad.)
Karl. Dipl.-Ing Zell (Fh)
Günter Dipl.-Ing Thom (FH)
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT87101661T priority Critical patent/ATE91047T1/en
Publication of EP0234367A2 publication Critical patent/EP0234367A2/en
Publication of EP0234367A3 publication Critical patent/EP0234367A3/en
Application granted granted Critical
Publication of EP0234367B1 publication Critical patent/EP0234367B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board

Definitions

  • the invention relates to a contact spring according to the preamble of claim 1.
  • Contact springs for electrical connector strips are provided to make electrical contact with a printed circuit board connected to the connector strip.
  • Currents flowing through such contact springs are usually directed to only one connection point of the circuit board.
  • partial currents must be conducted to different connection points of the printed circuit board in certain applications. Although this can be done by appropriately shaping the conductor tracks on the printed circuit board, it is associated with the disadvantage of space consumption on the printed circuit board.
  • mechanical damage to the contact lugs of the contact spring making contact with the printed circuit board can significantly increase the electrical resistance of the current path and trigger further damage to the connection lug and malfunctions, even the failure of connected electrical circuit parts.
  • the two contact springs which are at right angles to one another for polarity reasons and are produced from a sheet metal strip in a stamping process, have connecting parts and contact spring parts connected to one another via longitudinal and transverse webs.
  • the contact spring parts, to which the measuring and testing devices are connected are arranged in an electrically insulated manner in a double-chamber connector strip (housing).
  • the connecting parts are electrically non-insulated and are used for the electrical connection of the circuit board to the measuring and testing devices is soldered into corresponding receiving openings in the circuit board.
  • a current distribution arrangement is known from EP-A3-00 54 377, with which high electrical powers are delivered, for example, to printed circuit boards.
  • the current distribution arrangement contains an insulating housing with a U-shaped metallic current distribution frame, for example made of copper, which is detachably arranged therein.
  • the power distribution frame has a multiplicity of connecting lugs which dip into corresponding openings in the housing and can additionally be pressed into receiving openings in the printed circuit board when the power distribution arrangement is attached to a printed circuit board.
  • a hole is provided on the power distribution frame through which a power supply cable can be attached.
  • the contact spring for electrical connector strips, with which a circuit board high electrical powers are supplied.
  • the contact spring has, in addition to a contact spring part, a connecting part with at least two connecting lugs, which are soldered into a corresponding receiving opening in the printed circuit board.
  • the contact spring part in turn serves as a receptacle for a contact pin supplying the electrical power, in which two spring legs laterally grip the contact pin for the necessary electrical connection.
  • the invention is based, to build contact springs for electrical connector strips, the task of the electrical resistance and are therefore suitable for higher currents.
  • a contact spring part facing a contact pin to be inserted is shaped such that its electrical resistance corresponds to the electrical resistance of the connecting part.
  • the contact spring shown in Figure 1 for an electrical connector strip has three symmetrical connection lugs 1 arranged to the insertion axis of a contact pin to be inserted.
  • the connection lugs 1 in their entirety form the connection part serving for the electrical connection to a printed circuit board connected to the connector strip.
  • Connector strip and circuit board are not shown in the figures.
  • the connecting part of the contact spring according to the invention can have at least two connecting lugs 1 which can be pressed or soldered into a corresponding receiving opening in the printed circuit board and which serve for current distribution.
  • the contact spring is preferably formed as a one-piece body, on the side facing away from the insertion opening, the connection lugs 1 are arranged. They are described as detailed below, when using the press-in technique they are bent into a 2-V shape in their press-in area in order to enable the press-fitting into a corresponding circuit board receptacle opening with only a small press-in force and to thereby ensure reliable contacting.
  • the two side legs 3 and 4 forming the V-shaped region run obliquely towards one another towards the free end of each connecting lugs 1.
  • the contact spring can be shaped in different ways on its part facing a contact pin to be inserted.
  • This part of the contact spring can consist of two spring legs 5 arranged symmetrically to the insertion axis, the shape of which is shown in FIGS. 1, 2 and 3.
  • the spring legs 5 have on their underside centering lugs 6 which, in the installed state, bear against a centering web with pre-tensioning, as a result of which the spring is pre-opened to reduce the insertion force and is protected against insertion.
  • the contact spring has a resilient web 7 in the region of the insertion opening, which web is inserted into a correspondingly shaped slot in order to mount the contact spring in the connector strip.
  • At least one dome-shaped latching element 8 presses against the contact spring receiving opening in the connector strip.
  • the contact spring is shaped on its part facing a contact pin to be inserted such that its electrical resistance corresponds to the electrical resistance of the connecting part.
  • the contact spring consists only of a material such as copper, or if it consists at least in its current-carrying area of the same material or of different materials of the same electrical conductivity, the electrical resistance of the contact spring part facing a contact pin to be inserted and the connection part only depend on the formation of the two parts.
  • the electrical resistance depends on the shape of the surface of the current-carrying contact spring parts.
  • connection lugs 1 serve to distribute the current supplied by the contact pin and the part of the contact spring facing it. A partial flow of the total flow flows through each connecting lug 1. The partial currents are led via the connection lug 1 into corresponding metallized receiving openings on the printed circuit board, from where the partial currents can be supplied to the intended current-consuming circuit parts on separate conductor tracks. However, individual conductor tracks can also be merged immediately in order to link several partial streams.
  • the press-in area 2 of the connecting lug 1 which can be V-shaped, for example, is formed by two side legs 3 and 4. Towards the free end of the connecting lug 1, the press-in region 2 is delimited by the side legs 3 and 4 which run obliquely towards one another.
  • the V-shaped fitting area is limited by collar-shaped widenings.
  • the collar-shaped widenings are used to attach a press-in tool.
  • the outer edges of the two side legs 3 and 4 of the connecting lug 1 are rounded.
  • the side legs 3 and 4 tapering towards one another towards the free end of the connecting lug 1 form a substantially rounded tip which, when the connecting lug 1 is inserted into the circuit board receiving opening, strikes the opening in the center. This ensures that the terminal lugs 1 can precisely and gently slide into the corresponding openings, thereby avoiding unnecessary chip removal from the metallized reveal of the receiving opening arranged in the printed circuit board.
  • FIG. 2 shows a top view of the contact spring with a total of six connecting lugs 1, each having side legs 3 and 4, with spring legs 5, a fastening element 7 designed as a resilient web and two latching elements 8, which have a circular base in the form of a dome.
  • the spring legs 5 shown in FIG. 2 run conically towards the insertion opening and have, at their insertion opening directly facing part, approximately semi-circular, outwardly open deformations which ensure reliable contacting of a contact pin to be inserted with the contact spring.
  • the non-numbered circular opening in the middle of the contact spring surface can serve to serve as a connection to the connector strip Fastening element, such as a screw.
  • FIG. 3 shows a view of the side of the contact spring facing a contact pin to be inserted, with connecting lugs 1, which have a press-in area 2, with spring legs 5, centering lugs 6, the resilient web 7 and with two locking elements 8 arranged symmetrically to the insertion axis 8.
  • the contact spring can be on it the insertion opening opposite side to be open to receive contact pins of different lengths.
  • the contact pins can be made longer than the corresponding contact spring.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Connecting Device With Holders (AREA)

Abstract

The invention relates to a spring contact for an electrical plug connection strip having a connecting part which is used for the electrical connection to a printed-circuit board connected to the plug connection strip. In order to distribute higher currents which are to be conducted through the spring contact, the connecting part has at least two connecting tabs (1) which can be soldered or pressed in each case into a corresponding mounting hole in the printed-circuit board. <IMAGE>

Description

Die Erfindung betrifft eine Kontaktfeder nach dem Oberbegriff des Anspruchs 1.The invention relates to a contact spring according to the preamble of claim 1.

Kontaktfedern für elektrische Steckverbindungsleisten sind dafür vorgesehen, den elektrischen Kontakt zu einem mit der Steckverbindungsleiste verbundenen Leiterplatte herzustellen. Durch derartige Kontaktfedern fließende Ströme werden dabei gewöhnlich auf nur einen Anschlußpunkt der Leiterplatte geleitet. Bei höheren, durch eine Kontaktfeder zu führende Ströme sind jedoch bei bestimmten Anwendungsfällen Teilströme auf verschiedene Anschlußpunkte der Leiterplatte zu leiten. Dies kann zwar durch entsprechende Ausformung der Leiterbahnen auf der Leiterplatte geschehen, ist aber mit dem Nachteil eines Flächenverbrauchs auf der Leiterplatte verbunden. Im übrigen kann eine mechanische Beschädigung von den Kontakt zur Leiterplatte herstellenden Anschlußfahnen der Kontaktfeder den elektrischen Widerstand des Strompfades erheblich ansteigen lassen und weitere Beschädigungen der Anschlußfahne sowie Funktionsstörungen sogar den Ausfall angeschlossener elektrischer Schaltungsteile auslösen.Contact springs for electrical connector strips are provided to make electrical contact with a printed circuit board connected to the connector strip. Currents flowing through such contact springs are usually directed to only one connection point of the circuit board. At higher currents to be guided by a contact spring, however, partial currents must be conducted to different connection points of the printed circuit board in certain applications. Although this can be done by appropriately shaping the conductor tracks on the printed circuit board, it is associated with the disadvantage of space consumption on the printed circuit board. In addition, mechanical damage to the contact lugs of the contact spring making contact with the printed circuit board can significantly increase the electrical resistance of the current path and trigger further damage to the connection lug and malfunctions, even the failure of connected electrical circuit parts.

Aus der DE-A1-34 41 134 sind bereits zwei Kontaktfedern eines Prüfsteckers bekannt, mit dem Meß- und Prüfeinrichtungen an Schaltungen von gedruckten Leiterplatten angeschlossen werden. Die zwei aus Polaritätsgründen rechtwinklig zueinanderstehenden und in einem Stanzvorgang aus einem Blechband hergestellten Kontaktfedern weisen über Längs- und Querstege miteinander verbundene Anschlußteile und Kontaktfederteile auf. Die Kontaktfederteile, an die die Meß- und Prüfeinrichtungen angeschlossen werden, sind in einer doppelkammerigen Steckverbindungsleiste (Gehäuse) elektrisch isoliert angeordnet. Die Anschlußteile sind elektrisch unisoliert und werden für den elektrischen Anschluß der Leiterplatte an die Meß- und Prüfeinrichtungen in korrespondierende Aufnahmeöffnungen der Leiterplatte verlötet.From DE-A1-34 41 134 two contact springs of a test plug are already known, with which measuring and testing devices are connected to circuits of printed circuit boards. The two contact springs, which are at right angles to one another for polarity reasons and are produced from a sheet metal strip in a stamping process, have connecting parts and contact spring parts connected to one another via longitudinal and transverse webs. The contact spring parts, to which the measuring and testing devices are connected, are arranged in an electrically insulated manner in a double-chamber connector strip (housing). The connecting parts are electrically non-insulated and are used for the electrical connection of the circuit board to the measuring and testing devices is soldered into corresponding receiving openings in the circuit board.

Aus der EP-A3-00 54 377 ist eine Stromverteilungsanordnung bekannt, mit der hohe elektrische Leistungen beispielsweise an gedruckte Leiterplatten abgegeben werden. Hierfür enthält die Stromverteilungsanordnung ein isolierendes Gehäuse mit einem darin lösbar angeordneten, U-förmig ausgebildeten metallischen, beispielsweise aus Kupfer hergestellten Stromverteilungsrahmen. Der Stromverteilungsrahmen weist eine Vielzahl von Anschlußfahnen, die in entsprechende Öffnungen des Gehäuses eintauchen und zusätzlich beim Anbringen der Stromverteilungsanordnung auf eine gedruckte Leiterplatte in Aufnahmeöffnungen der Leiterplatte einpreßbar sind. Für die Zuführung der elektrischen Leistung ist auf dem Stromverteilungsrahmen eine Bohrung vorgesehen, durch die ein Stromversorgungskabel befestigbar ist.A current distribution arrangement is known from EP-A3-00 54 377, with which high electrical powers are delivered, for example, to printed circuit boards. For this purpose, the current distribution arrangement contains an insulating housing with a U-shaped metallic current distribution frame, for example made of copper, which is detachably arranged therein. The power distribution frame has a multiplicity of connecting lugs which dip into corresponding openings in the housing and can additionally be pressed into receiving openings in the printed circuit board when the power distribution arrangement is attached to a printed circuit board. For the supply of electrical power, a hole is provided on the power distribution frame through which a power supply cable can be attached.

Aus der US-A-4,405,189 ist eine Kontaktfeder für elektrische Steckverbindungsleisten bekannt, mit der einer Leiterplatte hohe elektrische Leistungen zugeführt werden. Die Kontaktfeder weist dazu neben einem Kontaktfederteil ein Anschlußteil mit mindestens zwei Anschlußfahnen auf, die in je eine korrespondierende Aufnahmeöffnung der Leiterplatte verlötet werden. Das Kontaktfederteil seinerseits dient als Aufnahme für einen die elektrische Leistung zuführenden Kontaktstift, bei dem zwei Federschenkel den Kontaktstift für die notwendige elektrische Verbindung seitlich erfassen.From US-A-4,405,189 a contact spring for electrical connector strips is known, with which a circuit board high electrical powers are supplied. For this purpose, the contact spring has, in addition to a contact spring part, a connecting part with at least two connecting lugs, which are soldered into a corresponding receiving opening in the printed circuit board. The contact spring part in turn serves as a receptacle for a contact pin supplying the electrical power, in which two spring legs laterally grip the contact pin for the necessary electrical connection.

Aus dem vorstehenden druckschriftlich erfaßten Stand der Technik ist es jedoch nicht bekannt, Kontaktfedern für elektrische Steckverbindungsleisten bezüglich des elektrischen Widerstands zu dimensionieren.However, it is not known from the above prior art documented in writing to dimension contact springs for electrical connector strips with regard to the electrical resistance.

Der Erfindung liegt die Aufgabe zugrunde, Kontaktfedern für elektrische Steckverbindungsleisten aufzubauen, die bezüglich des elektrischen Widerstands dimensioniert und damit für höhere Ströme geeignet sind.The invention is based, to build contact springs for electrical connector strips, the task of the electrical resistance and are therefore suitable for higher currents.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of patent claim 1.

Zur Bildung von Teilströmen aus einem relativ hohen, durch eine Kontaktfeder zu leitenden Gesamtstrom sind keine besonderen Leiterbahnen auf der Leiterplatte vorzusehen. Werden dagegen die auf der Leiterplatte getrennt geführten Teilströme zu einem Gesamtstrom verknüpft, so wirken sich bei der erfindungsgemäßen Kontaktfeder mechanische Beschädigungen an einer von mehreren Anschlußfahnen in geringerem Umfang aus als mechanische Beschädigungen, die an einer einziger Anschlußfahne einer Kontaktfeder auftreten würden. In diesem Zusammenhang ist es vorgesehen, daß ein einem einzuführenden Kontaktstift zugewandtes Kontaktfederteil derart ausgeformt ist, daß dessen elektrischer Widerstand dem elektrischen Widerstand des Anschlußteiles entspricht.To form partial currents from a relatively high total current to be conducted by a contact spring, no special conductor tracks are to be provided on the circuit board. If, on the other hand, the partial currents carried separately on the printed circuit board are combined to form a total current, mechanical damage to one of several connecting lugs has less effect on the contact spring according to the invention than mechanical damage that would occur on a single connecting lug of a contact spring. In this context, it is provided that a contact spring part facing a contact pin to be inserted is shaped such that its electrical resistance corresponds to the electrical resistance of the connecting part.

Weitere Vorteilhafte Weiterbildungen der erfindungsgemäßen Kontaktfeder ergeben sich aus den Unteransprüchen sowie aus der nachfolgenden Beschreibung eines Ausführungsbeispieles der Erfindung.Further advantageous developments of the contact spring according to the invention result from the subclaims and from the following description of an embodiment of the invention.

Nachfolgend wird anhand eines in der Zeichnung dargestellten Ausführungsbeispieles die Erfindung näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing.

Es zeigen

  • Figur 1 eine Seitenansicht der erfindungsgemäßen Kontaktfeder,
  • Figur 2 eine Draufsicht der Kontaktfeder,
  • Figur 3 eine Ansicht der einem einzuführenden Kontaktstift zugewandten Seite der Kontaktfeder,
  • Figur 4 einen Querschnitt durch die Einpreßzone einer Anschlußfahne der Kontaktfeder.
Show it
  • FIG. 1 shows a side view of the contact spring according to the invention,
  • FIG. 2 shows a top view of the contact spring,
  • FIG. 3 shows a view of the side of the contact spring facing a contact pin to be inserted,
  • Figure 4 shows a cross section through the press-in zone of a terminal lug of the contact spring.

Die in Figur 1 dargestellte Kontaktfeder für eine elektrische Steckverbindungsleiste weist je drei symmetrisch zur Einsteckachse eines einzuführenden Kontaktstiftes angeordnete Anschlußfahnen 1 auf. Die Anschlußfahnen 1 bilden in ihrer Gesamtheit das dem elektrischen Anschluß an eine mit der Steckverbindungsleiste verbundene Leiterplatte dienende Anschlußteil. Steckverbindungsleiste und Leiterplatte sind in den Figuren nicht dargestellt. Das Anschlußteil der Kontaktfeder gemäß der Erfindung kann mindestens zwei, in je eine korrespondierende Aufnahmeöffnung der Leiterplatte einpreßbare oder lötbare,der Stromverteilung dienende Anschlußfahnen 1 aufweisen.The contact spring shown in Figure 1 for an electrical connector strip has three symmetrical connection lugs 1 arranged to the insertion axis of a contact pin to be inserted. The connection lugs 1 in their entirety form the connection part serving for the electrical connection to a printed circuit board connected to the connector strip. Connector strip and circuit board are not shown in the figures. The connecting part of the contact spring according to the invention can have at least two connecting lugs 1 which can be pressed or soldered into a corresponding receiving opening in the printed circuit board and which serve for current distribution.

Die Kontaktfeder ist vorzugsweise als einteiliger Körper ausgebildet, an dessen der Einstecköffnung abgewandten Seite die Anschlußfahnen 1 angeordnet sind. Sie sind wie unten detalliert beschrieben, bei Anwendung der Einpreßtechnik in ihrem Einpreßbereich 2 V-förmig gebogen, um das Einpressen in je eine korrespondierende Leiterplattenaufnahmeöffnung schon mit geringer Einpreßkraft zu ermöglichen und dabei eine sichere Kontaktierung zu gewährleisten. Die beiden den V-förmigen Bereich bildenden Seitenschenkel 3 und 4 laufen zum freien Ende jeder Anschlußfahnen 1 schräg aufeinander zu.The contact spring is preferably formed as a one-piece body, on the side facing away from the insertion opening, the connection lugs 1 are arranged. They are described as detailed below, when using the press-in technique they are bent into a 2-V shape in their press-in area in order to enable the press-fitting into a corresponding circuit board receptacle opening with only a small press-in force and to thereby ensure reliable contacting. The two side legs 3 and 4 forming the V-shaped region run obliquely towards one another towards the free end of each connecting lugs 1.

Die Kontaktfeder kann an ihrem, einem einzuführenden Kontaktsift zugewandten Teil in unterschiedlicher Weise ausgeformt sein. Dieser Teil der Kontaktfeder kann aus zwei zur Einsteckachse symmetrisch angeordneten Federschenkeln 5 bestehen, deren Ausformung in den Figuren 1, 2 und 3 dargestellt ist. Die Federschenkel 5 weisen an ihrer Unterseite Zentriernasen 6 auf, die im eingebautem Zustand mit Vorspannung an einem Zentriersteg anliegen, wodurch die Feder zur Steckkraftminderung vorgeöffnet wird und gegen Hinterstecken geschützt ist.The contact spring can be shaped in different ways on its part facing a contact pin to be inserted. This part of the contact spring can consist of two spring legs 5 arranged symmetrically to the insertion axis, the shape of which is shown in FIGS. 1, 2 and 3. The spring legs 5 have on their underside centering lugs 6 which, in the installed state, bear against a centering web with pre-tensioning, as a result of which the spring is pre-opened to reduce the insertion force and is protected against insertion.

Die Kontaktfeder weist im Bereich der Einstecköffnung einen federnden Steg 7 auf, der zur Montage der Kontaktfeder in die Steckverbindungsleiste in einen entsprechend ausgeformten Schlitz eingeführt wird. Dabei drückt mindestens ein kuppenförmiges Rastelement 8 gegen die Kontaktfederaufnahmeöffnung in der Steckverbindungsleiste.The contact spring has a resilient web 7 in the region of the insertion opening, which web is inserted into a correspondingly shaped slot in order to mount the contact spring in the connector strip. At least one dome-shaped latching element 8 presses against the contact spring receiving opening in the connector strip.

Das beschriebene Zusammenwirken der Zentriernasen 6, des Stegs 7 und der Rastelemente 8 mit der Aufnahmeöffnung der Steckverbindungsleiste ermöglicht beschränkte Bewegungen der Kontaktfeder gegen die Steckverbindungsleiste beim Ein- bzw. Ausstecken eines Kontaktstiftes, ohne daß der Halt der Kontaktfeder in der Steckverbindungsleiste beeinträchtigt wird. Auf diese Weise werden auch Herstellungstoleranzen der zusammenwirkenden Teile ausgeglichen.The described interaction of the centering lugs 6, the web 7 and the locking elements 8 with the receiving opening of the connector strip enables limited movements of the contact spring against the connector strip when inserting or removing a contact pin, without the hold of the contact spring in the connector strip being impaired. This also compensates for manufacturing tolerances of the interacting parts.

Die Kontaktfeder ist erfindungsgemäß an ihrem einem einzuführenden Kontaktstift zugewandten Teil so ausgeformt, daß dessen elektrischer Widerstand dem elektrischen Widerstand des Anschlußteils entspricht. Wenn die Kontaktfeder nur aus einem Material wie beispielsweise Kupfer besteht, bzw. wenn sie mindestens in ihrem stromdurchflossenen Bereich aus dem gleichen Material oder aus unterschiedlichen Materialien gleicher elektrischer Leitfähigkeit besteht, so hängt der elektrische Widerstand des einem einzuführenden Kontaktstift zugewandten Kontaktfederteils und des Anschlußteils nur von der Ausformung der beiden Teile ab. Bei gleicher Materialdicke, wie beispielsweise bei einem gleichmäßigen, für die gesamte Kontaktfeder benutzten Kupferblech hängt der elektrische Widerstand von der Ausformung der Oberfläche der stromdurchflossenen Kontaktfederteile ab.According to the invention, the contact spring is shaped on its part facing a contact pin to be inserted such that its electrical resistance corresponds to the electrical resistance of the connecting part. If the contact spring consists only of a material such as copper, or if it consists at least in its current-carrying area of the same material or of different materials of the same electrical conductivity, the electrical resistance of the contact spring part facing a contact pin to be inserted and the connection part only depend on the formation of the two parts. With the same material thickness, for example with a uniform copper sheet used for the entire contact spring, the electrical resistance depends on the shape of the surface of the current-carrying contact spring parts.

Die Anschlußfahnen 1 dienen der Stromverteilung des durch Kontaktstift und des ihm zugewandten Teils der Kontaktfeder zugeführten Stroms. Durch jede Anschlußfahne 1 fließt ein Teilstrom des Gesamtstroms. Die Teilströme werden über die Anschlußfahne 1 in korrespondierende metallisierte Aufnahmeöffnungen auf der Leiterplatte geführt, von wo die Teilströme auf seperaten Leiterbahnen den vorgesehenen stromverbrauchenden Schaltungsteilen zugeführt werden können. Einzelne Leiterbahnen können jedoch auch unmittelbar zusammengeführt werden, um mehrere Teilströme zu verknüpfen.The connection lugs 1 serve to distribute the current supplied by the contact pin and the part of the contact spring facing it. A partial flow of the total flow flows through each connecting lug 1. The partial currents are led via the connection lug 1 into corresponding metallized receiving openings on the printed circuit board, from where the partial currents can be supplied to the intended current-consuming circuit parts on separate conductor tracks. However, individual conductor tracks can also be merged immediately in order to link several partial streams.

Der Einpreßbereich 2 der Anschlußfahne 1, der beispielsweise V-förmig ausgebildet sein kann, wird von zwei Seitenschenkeln 3 und 4 gebildet. Zum freien Ende der Anschlußfahne 1 hin, ist der Einpreßbereich 2 durch die schräg aufeinander zulaufenden Seitenschenkel 3 und 4 begrenzt.The press-in area 2 of the connecting lug 1, which can be V-shaped, for example, is formed by two side legs 3 and 4. Towards the free end of the connecting lug 1, the press-in region 2 is delimited by the side legs 3 and 4 which run obliquely towards one another.

Auf der anderen Seite wird der V-förmige Einpeßbereich durch kragenförmige Verbreiterungen begrenzt. Die kragenförmigen Verbreiterungen dienen dazu, ein Einpreßwerkzeug anzusetzen.On the other hand, the V-shaped fitting area is limited by collar-shaped widenings. The collar-shaped widenings are used to attach a press-in tool.

Beim Einpressen einer Anschlußfahne 1 in eine hier nicht dargestellte metallisierte Leiterplattenaufnahmeöffnung entstehen zwischen dem V-förmigen Profil der Einpreßzone und der Lochlaibung drei Berührungszonen, nämlich je eine Berührungszone an den äußeren Kanten der beiden Seitenschenkel 3 und 4 sowie eine Berührungszone am Biegewulst. Aufgrund des Öffnungswinkels des V-förmigen Einpreßbereiches drückt sich dieser beim Einpressen im Bereich der Toleranzen der Durchmesser der Leiterplattenaufnahmeöffnungen zusammen, wobei sich eine Restfederung ergibt, die eine sichere Kontaktgabe gewährleistet. Durch löffelförmige Begrenzungen des Einpreßbereiches 2 an beiden Seiten weist die Anschlußfahne 1 gleichzeitig die gewünschte Steifheit und Stabilität auf. Die Einpreßkräfte können sicher auf die beiden Seitenschenkel 3 und 4 übertragen werden, da der eine Endbereich des V-förmigen Einpreßbereiches zwischen den kragenförmigen Verbreiterungen zu liegen kommt.When a terminal lug 1 is pressed into a metallized circuit board receiving opening (not shown here), three contact zones arise between the V-shaped profile of the press-in zone and the hole reveal, namely one contact zone on the outer edges of the two side legs 3 and 4 and one contact zone on the bending bead. Due to the opening angle of the V-shaped press-in area, it compresses when pressed in within the tolerances of the diameters of the circuit board receiving openings, resulting in a residual spring that ensures reliable contact. By spoon-shaped boundaries of the press-in area 2 on both sides the terminal lug 1 has the desired rigidity and stability at the same time. The press-in forces can be safely transmitted to the two side legs 3 and 4, since the one end region of the V-shaped press-in region comes to lie between the collar-shaped widenings.

Bei eine anmeldungsgemäße Kontaktfeder sind die äußeren Kanten der beiden Seitenschenkel 3 und 4 der Anschlußfahne 1 abgerundet. Gleichzeitig bilden die zum freien Ende der Anschlußfahne 1 hin schräg aufeinander zulaufenden Seitenschenkel 3 und 4 eine im wesentlichen abgerundete Spitze, die beim Einführen der Anschlußfahne 1 in die Leiterplattenaufnahmeöffnung mittig auf die Öffnung auftrifft. Dadurch ist sichergestellt, daß die Anschlußfahnen 1 zielgenau und sanft in die korrespondierenden Öffnungen eingleiten können, wodurch ein unnötiges Spanabheben von der metallisierten Laibung der in der Leiterplatte angeordneten Aufnahmeöffnung vermieden wird.In a contact spring according to the application, the outer edges of the two side legs 3 and 4 of the connecting lug 1 are rounded. At the same time, the side legs 3 and 4 tapering towards one another towards the free end of the connecting lug 1 form a substantially rounded tip which, when the connecting lug 1 is inserted into the circuit board receiving opening, strikes the opening in the center. This ensures that the terminal lugs 1 can precisely and gently slide into the corresponding openings, thereby avoiding unnecessary chip removal from the metallized reveal of the receiving opening arranged in the printed circuit board.

FIG 2 zeigt eine Draufsicht der Kontaktfeder mit insgesamt sechs Anschlußfahnen 1, die jeweils Seitenschenkel 3 und 4 aufweisen, mit Federschenkeln 5, einem als federnder Steg ausgebildeten Befestigungselement 7 sowie zwei Rastelementen 8, die bei kuppenförmiger Ausbildung eine kreisförmige Basis aufweisen. Die in FIG 2 dargestellten Federschenkel 5 laufen konisch auf die Einstecköffnung zu und weisen an ihrem Einstecköffnung unmittelbar zugewandten Teil in etwa halbkreisförmige, nach außen geöffnete Verformungen auf, die eine sichere Kontaktierung eines einzuführenden Kontaktstiftes mit der Kontaktfeder gewährleisten. Die nicht bezifferte kreisrunde Öffnung in der Mitte der Kontaktfederoberfläche kann dazu dienen, ein der Verbindung mit der Steckverbindungsleiste dienendes Befestigungselement, wie beispielsweise eine Schraube, aufzunehmen.2 shows a top view of the contact spring with a total of six connecting lugs 1, each having side legs 3 and 4, with spring legs 5, a fastening element 7 designed as a resilient web and two latching elements 8, which have a circular base in the form of a dome. The spring legs 5 shown in FIG. 2 run conically towards the insertion opening and have, at their insertion opening directly facing part, approximately semi-circular, outwardly open deformations which ensure reliable contacting of a contact pin to be inserted with the contact spring. The non-numbered circular opening in the middle of the contact spring surface can serve to serve as a connection to the connector strip Fastening element, such as a screw.

FIG 3 zeigt eine Ansicht der einem einzuführenden Kontaktstift zugewandten Seite der Kontaktfeder mit Anschlußfahnen 1, die einen Einpreßbereich 2 aufweisen, mit Federschenkeln 5, Zentriernasen 6, dem federnden Steg 7 sowie mit zwei zu der Einsteckachse symmetrisch angeordneten Rastelementen 8. Die Kontaktfeder kann an ihrer der Einstecköffnung gegenüberliegenden Seite geöffnet sein, um Kontaktstifte unterschiedlicher Länge aufzunehmen. Dabei können die Kontaktstifte länger ausgebildet sein als die korrespondierende Kontaktfeder.3 shows a view of the side of the contact spring facing a contact pin to be inserted, with connecting lugs 1, which have a press-in area 2, with spring legs 5, centering lugs 6, the resilient web 7 and with two locking elements 8 arranged symmetrically to the insertion axis 8. The contact spring can be on it the insertion opening opposite side to be open to receive contact pins of different lengths. The contact pins can be made longer than the corresponding contact spring.

FIG 4 zeigt einen Querschnitt durch die Einpreßzone 2 einer Anschlußfahne 1 der Kontaktfeder. Als besonders vorteilhaft hat sich für die Seiterschenkel 3 und 4 ein Winkel von 60° herausgestellt. Bei der erfindungsgemäßen Kontaktfeder ergibt sich aufgrund ihrer besonderen Form, daß die Einpreßkraft gleich der Ausziehkraft ist, was sich als vorteilhaft erweist, wenn aus irgendeinem Grund defekte Kontaktfedern ausgewechselt werden müssen.4 shows a cross section through the press-in zone 2 of a connecting lug 1 of the contact spring. An angle of 60 ° has been found to be particularly advantageous for the side legs 3 and 4. In the contact spring according to the invention, due to its special shape, it follows that the press-in force is equal to the pull-out force, which proves to be advantageous if defective contact springs have to be replaced for some reason.

Claims (13)

  1. Contact spring for an electrical plug connecting strip having a connecting part which is used for the electrical connection to a printed-circuit board connected to the plug connecting strip and comprises at least two connecting tabs (1) which can be pressed or soldered into in each case one corresponding retaining opening on the printed-circuit board and are used for power distribution, characterised in that a contact spring part (5, 6) which faces a contact pin which is to be inserted is formed out in such a manner that its electrical resistance corresponds to the electrical resistance of the connecting part.
  2. Contact spring according to Claim 1, characterised in that the contact spring part (5, 6) has two spring limbs (5) which are arranged symmetrically with respect to the insertion direction.
  3. Contact spring according to one of the preceding claims, characterised in that the connecting tabs (1) have side limbs (3, 4) in the pressing-in region (2), which side limbs (3, 4) are bent in a V shape and run obliquely towards one another towards the free end of the connecting tabs (1).
  4. Contact spring according to one of the preceding claims, characterised in that the pressing-in region (2) of the connecting tabs (1) is bounded towards the end which is not free by two opposite collar-shaped broadened regions.
  5. Contact spring according to one of the preceding claims, characterised in that the side limbs (3, 4) which run obliquely towards one another towards the free end of the connecting tabs (1) form an essentially rounded tip which runs in the centre of the hole when the connecting tabs (1) are inserted into the printed-circuit board.
  6. Contact spring according to one of the preceding claims, characterised in that the two side limbs (3, 4) which form the V-shaped region form an angle of 60°.
  7. Contact spring according to one of the preceding claims, characterised in that the outer edges of the two side limbs (3, 4) are rounded.
  8. Contact spring according to one of Claims 2 to 7, characterised in that each spring limb (5) has a centring lug (6).
  9. Contact spring according to one of Claims 2 to 8, characterised in that, on its part which faces a contact pin which is to be inserted, it has an attachment element (7) in addition to the spring limbs (5).
  10. Contact spring according to Claim 9, characterised in that the attachment element (7) is constructed as a sprung web.
  11. Contact spring according to Claim 9 or 10, characterised in that the attachment element (7) has at least one latching element (8).
  12. Contact spring according to Claim 11, characterised in that each latching element (8) is constructed in the form of a dome.
  13. Contact spring according to one of the preceding claims, characterised in that the contact spring is open on its side opposite the insertion opening.
EP87101661A 1986-02-26 1987-02-06 Spring contact for an electrical plug-in connection rail Expired - Lifetime EP0234367B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101661T ATE91047T1 (en) 1986-02-26 1987-02-06 CONTACT SPRING FOR AN ELECTRICAL CONNECTOR RAIL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3606198 1986-02-26
DE3606198 1986-02-26

Publications (3)

Publication Number Publication Date
EP0234367A2 EP0234367A2 (en) 1987-09-02
EP0234367A3 EP0234367A3 (en) 1988-08-10
EP0234367B1 true EP0234367B1 (en) 1993-06-23

Family

ID=6294984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101661A Expired - Lifetime EP0234367B1 (en) 1986-02-26 1987-02-06 Spring contact for an electrical plug-in connection rail

Country Status (3)

Country Link
EP (1) EP0234367B1 (en)
AT (1) ATE91047T1 (en)
DE (1) DE3786272D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4973257A (en) * 1990-02-13 1990-11-27 The Chamberlain Group, Inc. Battery terminal
NO982678L (en) * 1997-06-26 1998-12-28 Siemens Ag Plug Connection piece

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359258A (en) * 1980-01-14 1982-11-16 Trw Inc. Electrical connector
JPS57123669A (en) * 1980-12-15 1982-08-02 Amp Inc Power distribution block
DE3441134A1 (en) * 1984-11-10 1986-05-15 Cannon Electric Gmbh Test plug having socket contacts, and a method for producing such socket contacts

Also Published As

Publication number Publication date
ATE91047T1 (en) 1993-07-15
EP0234367A2 (en) 1987-09-02
DE3786272D1 (en) 1993-07-29
EP0234367A3 (en) 1988-08-10

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