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EP0578118B1 - Plug contact element - Google Patents

Plug contact element Download PDF

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Publication number
EP0578118B1
EP0578118B1 EP93110417A EP93110417A EP0578118B1 EP 0578118 B1 EP0578118 B1 EP 0578118B1 EP 93110417 A EP93110417 A EP 93110417A EP 93110417 A EP93110417 A EP 93110417A EP 0578118 B1 EP0578118 B1 EP 0578118B1
Authority
EP
European Patent Office
Prior art keywords
plug
cable
connection side
lead
slot
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
EP93110417A
Other languages
German (de)
French (fr)
Other versions
EP0578118A1 (en
Inventor
Gerhard Wehrle
Rolf Deuschle
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 EP0578118A1 publication Critical patent/EP0578118A1/en
Application granted granted Critical
Publication of EP0578118B1 publication Critical patent/EP0578118B1/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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6616—Structural association with built-in electrical component with built-in single component with resistor
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6691—Structural association with built-in electrical component with built-in electronic circuit with built-in signalling means

Definitions

  • the invention relates to a plug-in contact element according to the preamble of claim 1.
  • plug-in contact elements are known, for example, from cable connectors for the sensors, as are used, for example, for connection to proximity switches.
  • a cable connector designed as an angle connector for example the "ELWIKA” type from the applicant
  • the sockets 2 fixed therein in a contact carrier 1 made of insulating material have radial bores 3;
  • the stripped end parts of the cores (strands) 4 of the associated cable cores 5 are passed through the radial bores 3 for contacting and soldered to the respective socket 2.
  • Tapered end sections 6 of the sockets 2 pass through holes in a circuit board 7 and are conductively connected to contact points by soldering 8 on the mating surfaces.
  • the cable connection is in particular carried out by a whole series of operations required for each cable core, namely stripping the cable core, twisting the stranded core, tinning the stranded core, inserting the tinned stranded core in the radial bore and soldering with the plug contact element, very complex.
  • this effort is often no longer compatible with the calculation required for such mass products.
  • connection technology just like with conventional insulation displacement terminals (see, for example, EP-A-57 633), on the one hand due to the required end parts protruding beyond the connection point and the generally very limited space available on the other hand very specific contact element arrangements (pole images) possible.
  • the invention is therefore based on the object of developing a plug-in contact element of the type mentioned in such a way that, in the simplest and cheapest possible manner, minimal effort is required for its electrical connection and any arrangement of the plug-in contact elements in a very confined space.
  • the end piece of each insulated cable core is first inserted into the blind hole of the associated plug contact element and bent through 90 ° into the guide section of the slot.
  • the end of the wire lies about the length of the insulation displacement section of the slot above the bottom of the blind hole.
  • the end pieces of the cable cores can of course be angled by 90 ° before being inserted.
  • the cable cores are then pressed either individually or all at the same time into the insulation displacement section of the slots, the insulation jacket being cut through in each case and the cable core core resting against the edges of the insulation displacement section while deforming its cross section under pressure.
  • plug-in contact elements according to the invention are particularly suitable for contacting arbitrarily arranged contacts in a confined space with single wires because, compared to the prior art, the end parts of the wires do not protrude beyond the connection point.
  • the narrow ring collar formed by an embodiment of the blind bore according to claim 3 ensures at no extra cost that even non-pre-angled cable end pieces are only inserted into the associated blind hole to such an extent that when the cable wires are subsequently pressed into the insulation displacement sections they still have sufficient space in the blind hole without being excessively compressed or squeezed and without jeopardizing the safety of the insulation displacement connection.
  • a considerable simplification of assembly is achieved without any aids. Theoretically, this effect could also be achieved by a conical blind bore tapering towards the plug end.
  • the desired insertion depth would not be reliably achievable.
  • connection-side region of the blind bore up to the narrow annular collar Claim 4 is tapered, because in this way a light and therefore quick insertion of each cable core into the blind bore up to the collar is achieved in a very simple manner.
  • Known cable connectors for the use mentioned in accordance with the embodiment shown in FIG. 2 contain, as already described at the beginning, a circuit board 7 with electrical (for example resistors) and electro-optical (for example LEDs) components which on the through the tapered end sections 6 of the sockets 2 formed covenant rests.
  • electrical for example resistors
  • electro-optical for example LEDs
  • the connected cable is arranged at 90 ° to its axial direction, thus forming an angled plug connector.
  • An embodiment of the plug contact elements according to claim 6 makes it possible in a simple manner to produce cable plug connectors with a cable entry extending at any angle to the plug direction (for example at an angle of 90 ° also "straight" cable plug connectors).
  • FIG. 1 shows an exemplary embodiment of plug contact elements according to the invention in a multipole angle connector for proximity switches in a partially sectioned view.
  • the angled connector 10 has a contact carrier 11 with cylindrical sockets 12 pressed therein and a printed circuit board 13 which is connected to electrical, e.g. Resistors 14, and optoelectric devices, e.g. LEDs 15, is connected to display switching states.
  • the sockets 12 are provided for the galvanic connection to the cores of the insulated cable cores 17 of a multi-core cable 18 designed as strands 16 for connection to the plug pins of a proximity switch (not shown) and to the associated contacts of the printed circuit board 13.
  • the sockets 12 are pressed into plated-through recesses 19 in the printed circuit board 13 - a particularly cost-effective solution in comparison to connection by soldering or connecting lines.
  • a union nut 20 with a knurled grip 21 is provided, which engages behind a collar 22 of an annular collar 23 of the contact carrier 11.
  • the sockets 12 each consist of a plug-side socket part 24 and a connection-side end part 25, in which an axial blind bore 26 and a slot 27 are made in the bore wall 28.
  • the slot 27, the length of which is shorter than that of the blind bore 26, has a connection-side guide section 29 with a cutting zone 30 and an insulation displacement section 31 adjoining it.
  • the width of the guide section 29 is slightly smaller than the outer diameter of the cable cores 17, the width of the insulation displacement section 31 is smaller than the diameter of the strands 16.
  • the blind bore 26 has a plug-side area 32 and a connection-side area 33, the latter being slightly larger in diameter as the plug-in area 32 and, in order to facilitate the cable entry in the area of the slot 27, widens conically towards the free end of the socket 12.
  • the different diameters of the areas 32 and 33 form a narrow ring collar (34).
  • connection of the insulated cable cores 17 and at the same time their strain relief is particularly simple and inexpensive to manufacture in the following manner due to the construction of the socket 12 according to the invention:
  • Each cable wire 17 is first inserted into the blind bore 26 up to the annular collar 34, which is a little larger than the wire diameter due to the conical insertion funnel, the smallest diameter (which corresponds to the diameter of the subsequent cylindrical part of the connection-side region of the blind hole 26) can be done easily and quickly.
  • the cable core is then bent through approximately 90 ° into the guide section 29 of the slot 27 and slightly clamped (pre-fixed) therein by the dimensions described.
  • the circuit board 13 with its plated-through recesses 19 is pushed onto the connection-side end parts 25 of the sockets 12.
  • connection-side end part 25 due to the spring pressure of the connection-side end part 25 with a cross-section C-shaped in cross-section 27, so-called "C-pressing" as well as a firm mounting of the printed circuit board 13.
  • C-pressing due to the spring pressure of the connection-side end part 25 with a cross-section C-shaped in cross-section 27, so-called "C-pressing" as well as a firm mounting of the printed circuit board 13.
  • the plug-side surface 35 of the printed circuit board 13 at the same time all the cable wires 17 are pushed further into the slot, the insulating jacket of the cable wires 17 first being cut in the cutting zone 30 and then the strands 16 being pressed into the insulation displacement section 31 in such a way that they rest under pressure over a large area on their side edges and thus are permanently secure Ensure contact.
  • the free end of each cable wire 17 is almost completely inserted into the blind bore 26 in this process. An extremely simple assembly is thus possible without any auxiliary device or special operations.
  • the angled wire ends, together with the cable wires 17 held in the slots 27, furthermore result in a high strain relief, which cannot be achieved with conventional insulation displacement terminals.
  • this high tensile strength also makes it possible to carry out a direct encapsulation with plastic 36 in spite of the high forces occurring in the process.
  • the plastic 36 is also guided through a channel in the contact carrier 11 in the same working step and thereby forms a seal 37. This advantageously avoids the provision and assembly of a separate sealing ring.
  • the protruding wire ends which are not available in comparison to conventional insulation displacement terminals, also make it possible to arrange the sockets 12 in a confined space, an advantage which is particularly important in the case of connectors, which should always be as small as possible.
  • the plug-in contact elements according to the invention without any special measures, in contrast to the prior art, it is ensured that no stray wire strands and thus also no short circuits or changes in the prescribed air and creepage distances between live parts can occur.
  • the plug-in receptacles designed in accordance with the invention create a cable connector which is not only extremely cost-effective in terms of construction and manufacture, but also - as described - has a number of advantages which are particularly important for bulk articles such as connectors.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Led Devices (AREA)
  • Led Device Packages (AREA)
  • Semiconductor Lasers (AREA)

Abstract

In the case of a plug contact element (12) for cable plug connectors (10), an axial blind hole (26) and a slot (27) (which is incorporated in the hole wall (28) and originates from the end on the connection side) are provided in the end part (25) on the connection side. The length of the slot (27) is less than that of the blind hole (26) and it has a guide section (29), on the connection side, with a cutting zone (30) as well as an insulation-piercing terminal section (31) adjacent thereto, the width of the guide section (29) corresponding approximately to the external diameter of the insulated cable wire (17), and the width of the insulation-piercing terminal section (31) being smaller than the diameter of the electrically conductive core (16) of the cable wire (17). In consequence, a series of advantages is achieved in an extremely simple and cost-effective manner: - contact is made between the plug contact elements (12) and the cable wires (17), in a manner which is comparably as good as soldering, - a high level of strain relief, - direct extrusion coating is possible without any additional attachment measures, - no short-circuits or changes to the specified air gaps and leakage paths resulting from stray graded-cable wires and - it is possible to arrange the plug contact elements in a very confined space in accordance with any desired pole patterns. <IMAGE>

Description

Die Erfindung betrifft ein Steckkontaktelement gemäß dem Oberbegriff des Anspruches 1. Solche Steckkontaktelemente sind beispielsweise von Kabelsteckverbindern für die Sensorik bekannt, wie sie etwa zum Anschluß an Näherungsschalter verwendet werden. Ein derartiger als Winkelsteckverbinder ausgebildeter Kabelsteckverbinder (z.B. der Typ "ELWIKA" der Anmelderin) ist in Figur 2 schematisch dargestellt. Die darin in einem Kontaktträger 1 aus Isolierstoff fixierten Steckbuchsen 2 weisen radiale Bohrungen 3 auf; die abisolierten Endteile der Seelen (Litzen) 4 der zugehörigen Kabeladern 5 sind zur Kontaktierung durch die radialen Bohrungen 3 hindurchgeführt und mit der jeweiligen Buchse 2 verlötet. Verjüngte Endabschnitte 6 der Steckbuchsen 2 durchsetzen Bohrungen einer Schaltungsplatine 7 und sind auf den Gegenflächen mit Kontaktstellen durch Lötungen 8 leitend verbunden.
Bei dem bekannten Kabelsteckverbinder (vgl. z. B. DE-A-3 509 344) ist insbesondere der Kabelanschluß durch eine ganze Reihe für jede Kabelader erforderlicher Arbeitsgänge, nämlich Abisolieren der Kabelader, Verdrillen der Litzenseele, Verzinnen der Litzenseele, Einbringen der verzinnten Litzenseele in die Radialbohrung und Verlöten mit dem Steckkontaktelement, sehr aufwendig. Insbesondere bei vielpoligen Kabelsteckverbindern ist dieser Aufwand mit den bei derartigen Massenprodukten notwendigen Kalkulation häufig nicht mehr vereinbar.
Überdies sind bei dieser Anschlußtechnik, ebenso wie bei herkömmlichen Schneidklemmen (vgl. z. B. EP-A-57 633), auf Grund der erforderlichen, über die Anschlußstelle hinausragenden Endteile einerseits und des in aller Regel sehr begrenzten zur Verfügung stehenden Platzes andererseits nur ganz bestimmte Kontaktelementanordnungen (Polbilder) möglich.The invention relates to a plug-in contact element according to the preamble of claim 1. Such plug-in contact elements are known, for example, from cable connectors for the sensors, as are used, for example, for connection to proximity switches. Such a cable connector designed as an angle connector (for example the "ELWIKA" type from the applicant) is shown schematically in FIG. The sockets 2 fixed therein in a contact carrier 1 made of insulating material have radial bores 3; The stripped end parts of the cores (strands) 4 of the associated cable cores 5 are passed through the radial bores 3 for contacting and soldered to the respective socket 2. Tapered end sections 6 of the sockets 2 pass through holes in a circuit board 7 and are conductively connected to contact points by soldering 8 on the mating surfaces.
In the known cable connector (cf. e.g. DE-A-3 509 344), the cable connection is in particular carried out by a whole series of operations required for each cable core, namely stripping the cable core, twisting the stranded core, tinning the stranded core, inserting the tinned stranded core in the radial bore and soldering with the plug contact element, very complex. In the case of multi-pole cable connectors in particular, this effort is often no longer compatible with the calculation required for such mass products.
Moreover, with this connection technology, just like with conventional insulation displacement terminals (see, for example, EP-A-57 633), on the one hand due to the required end parts protruding beyond the connection point and the generally very limited space available on the other hand very specific contact element arrangements (pole images) possible.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Steckkontaktelement der eingangs genannten Art derart weiterzubilden, daß auf möglichst einfache und kostengünstige Weise ein minimaler Aufwand für dessen elektrischen Anschluß sowie eine beliebige Anordnung der Steckkontaktelemente auf engstem Raum erreicht ist.The invention is therefore based on the object of developing a plug-in contact element of the type mentioned in such a way that, in the simplest and cheapest possible manner, minimal effort is required for its electrical connection and any arrangement of the plug-in contact elements in a very confined space.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Anspruches 1 angegebenen Mittel gelöst.
Zum Kabelanschluß wird das Endstück jeder isolierten Kabelader zunächst in die Sackbohrung des zugehörigen Steckkontaktelementes eingesteckt und um 90° in den Führungsabschnitt des Schlitzes hineingebogen. Das Aderende liegt dabei etwa um die Länge des Schneidklemmabschnittes des Schlitzes über dem Sackbohrungsboden. Alternativ können selbstverständlich die Endstücke der Kabeladern vor dem Einstecken bereits um 90° abgewinkelt sein.This object is achieved by the means specified in the characterizing part of claim 1.
For the cable connection, the end piece of each insulated cable core is first inserted into the blind hole of the associated plug contact element and bent through 90 ° into the guide section of the slot. The end of the wire lies about the length of the insulation displacement section of the slot above the bottom of the blind hole. Alternatively, the end pieces of the cable cores can of course be angled by 90 ° before being inserted.

Anschließend werden die Kabeladern entweder einzeln oder alle zugleich in den Schneidklemmabschnitt der Schlitze eingedrückt, wobei jeweils der Isoliermantel durchtrennt wird und die Kabeladerseele unter Verformung ihres Querschnitts unter Druck an den Kanten des Schneidklemmabschnittes anliegt.The cable cores are then pressed either individually or all at the same time into the insulation displacement section of the slots, the insulation jacket being cut through in each case and the cable core core resting against the edges of the insulation displacement section while deforming its cross section under pressure.

Dadurch ist auf äußerst einfache Weise mit gegenüber dem Stand der Technik ganz erheblich geringerem Anschließaufwand bei etwa gleichen Herstellkosten eine der Lötung gleichwertige Kontaktgabe zwischen Kabelader und Steckkontaktelement und zugleich eine der Lötung vergleichbare Zugentlastung und Halterung der Kabeladern erreicht. Bei üblichen Schneidklemmen (vgl. z. B. FR-A-1 362 994) ist die Zugentlastung und Haltewirkung sehr viel geringer.
Außerdem können die einzelnen Steckkontaktelemente sehr einfach in einer Vorrichtung entsprechend dem jeweiligen Polbild orientiert angeordnet und danach alle zugleich in den Kontaktträger eingepreßt werden, was bei den bekannten Steckkontaktelementen mit Radialbohrungen (Figur 2) nicht ohne weiteres möglich ist.
Auf Grund der hohen Zugfestigkeit der Kabeladern ist in vorteilhafter Weise auch eine direkte Umspritzung ohne Hilfsmittel möglich, während bei bekannten Schneidklemmen die Gefahr besteht, daß sich durch die beim Umspritzen auftretenden hohen Kräfte die Kontakte lösen. Dies trägt zur weiteren Kostenreduzierung bei.As a result, contacting between the cable wire and plug-in contact element, which is equivalent to the soldering, and at the same time a strain relief and holder of the cable wires which is comparable to the soldering, is achieved in an extremely simple manner with a considerably lower connection effort compared to the prior art. With conventional insulation displacement clamps (see e.g. FR-A-1 362 994) the strain relief and holding effect is much less.
In addition, the individual plug-in contact elements can be arranged very easily in a device in accordance with the respective pole pattern and then all of them can be pressed into the contact carrier at the same time, which is not readily possible in the known plug-in contact elements with radial bores (FIG. 2).
Due to the high tensile strength of the cable cores, direct encapsulation without auxiliary means is advantageously possible, while in known insulation displacement terminals there is a risk that the contacts will become detached due to the high forces occurring during encapsulation. This contributes to further cost reduction.

Darüberhinaus sind die erfindungsgemäßen Steckkontaktelemente besonders dazu geeignet, beliebig angeordnete Kontakte auf engstem Raum mit Einzeladern zu kontaktieren, weil im Vergleich zum Stand der Technik die Endteile der Adern nicht über die Anschlußstelle hinausragen.
Durch das Eintauchen der noch isolierten Kabeladern in die Sackbohrungen besteht schließlich im Gegensatz zum Stand der Technik auch keine Gefahr, daß durch vagabundierende Einzellitzendrähte Luft- und Kriechstrecken verändert werden, da ein Wegbiegen oder Abscheren von Einzellitzendrähten ausgeschlossen ist.In addition, the plug-in contact elements according to the invention are particularly suitable for contacting arbitrarily arranged contacts in a confined space with single wires because, compared to the prior art, the end parts of the wires do not protrude beyond the connection point.
By immersing the still insulated cable cores in the blind bores, in contrast to the prior art, there is finally no danger that air and creepage distances will be changed by stray individual stranded wires, since bending away or shearing off of individual stranded wires is impossible.

In den Unteransprüchen sind vorteilhafte Ausführungen bzw. Ausgestaltungen des Steckkontaktelementes nach dem Hauptanspruch angegeben.Advantageous embodiments of the plug-in contact element according to the main claim are specified in the subclaims.

Durch eine Ausbildung des Schlitzes gemäß Anspruch 2 ist eine leichte Klemmung der Kabeladern und damit eine Vorfixierung erreicht, die bei einem nachfolgenden gleichzeitigen Eindrücken aller Kabeladern in die Schneidklemmabschnitte die Verwendung einer sehr einfachen Vorrichtung ermöglicht und dabei sicherstellt, daß dieses Verfahren ohne Komplikationen durch an unterschiedlichen Stellen der Führungsabschnitte befindliche oder gar aus diesen herausgerutschte Kabeladern funktioniert.By designing the slot according to claim 2, a slight clamping of the cable cores and thus a pre-fixation is achieved, which enables the use of a very simple device when a subsequent simultaneous pressing of all cable cores into the insulation displacement sections and thereby ensures that this method can be carried out without complications due to different Place the guide sections located or even slipped out of these cable cores works.

Der durch eine Ausgestaltung der Sackbohrung nach Anspruch 3 gebildete schmale Ringbund gewährleistet ohne Mehrkosten, daß auch nicht vorabgewinkelte Kabelader-Endstücke nur so weit in die zugehörige Sackbohrung eingeführt werden, daß sie beim anschließenden Eindrücken der Kabeladern in die Schneidklemmabschnitte noch ausreichend Platz in der Sackbohrung haben ohne übermäßig gestaucht bzw. gequetscht zu werden und durch Gegendruck die Sicherheit des Schneidklemmanschlusses zu gefährden. Dadurch ist eine erhebliche Montagevereinfachung ohne irgendwelche Hilfsmittel erzielt.
Theoretisch wäre diese Wirkung auch durch eine sich zum steckseitigen Ende hin verjüngende konische Sackbohrung erreichbar. Dabei wäre aber durch die unvermeidlichen Durchmessertoleranzen einerseits und den beim Ablängen der Kabelader meist ovalen Endquerschnitt die gewünschte Einstecktiefe nicht sicher erreichbar. Vorteilhaft ist es dagegen, den anschlußseitigen Bereich der Sackbohrung bis zu dem schmalen Ringbund gemäß Anspruch 4 konisch auszubilden, weil dadurch auf sehr einfache Weise ein leichtes und damit in der Fertigung schnelles Einführen jeder Kabelader in die Sackbohrung bis zum Ringbund erreicht ist.The narrow ring collar formed by an embodiment of the blind bore according to claim 3 ensures at no extra cost that even non-pre-angled cable end pieces are only inserted into the associated blind hole to such an extent that when the cable wires are subsequently pressed into the insulation displacement sections they still have sufficient space in the blind hole without being excessively compressed or squeezed and without jeopardizing the safety of the insulation displacement connection. A considerable simplification of assembly is achieved without any aids.
Theoretically, this effect could also be achieved by a conical blind bore tapering towards the plug end. However, due to the unavoidable diameter tolerances on the one hand and the end cross-section, which is usually oval when the cable wire is cut to length, the desired insertion depth would not be reliably achievable. On the other hand, it is advantageous according to the connection-side region of the blind bore up to the narrow annular collar Claim 4 to be tapered, because in this way a light and therefore quick insertion of each cable core into the blind bore up to the collar is achieved in a very simple manner.

In bekannten Kabelsteckverbindern für den genannten Einsatz gemäß der in Figur 2 dargestellten Ausführung ist - wie bereits eingangs beschrieben - eine Schaltungsplatine 7 mit elektrischen (z.B. Widerständen) und elektrooptischen (z.B. LEDs) Bauteilen enthalten, die auf dem durch die verjüngten Endabschnitte 6 der Steckbuchsen 2 gebildeten Bund aufliegt. Auch diese Gestaltung ist aufwendig, sowohl in der Herstellung (verjüngte Endabschnitte 6) als auch bezüglich der Montage (Lötverbindung). Durch die in Anspruch 5 angeführte vorteilhafte Weiterbildung der Erfindung ist ein äußerst kostengünstiger Anschluß, der in die durchkontaktierten Ausnehmungen der Schaltungsplatine eingepreßten, im Durchmesser nicht reduzierten Endteile der Steckkontaktelemente erzielt und die Schaltungsplatine zugleich dazu verwendbar, alle Kabeladern gleichzeitig ohne zusätzliche Hilfsmittel in die Schneidklemmabschnitte der Schlitze hineinzudrücken und darin zu halten. Das Kontaktieren der Steckkontaktelemente mit der Schaltungsplatine einerseits und den Kabeladern andererseits erfolgt im gleichen Arbeitsgang und erfordert somit einen minimalen Montageaufwand.
Die auf Höhe der Schlitze im Querschnitt C-förmigen anschlußseitigen Endteile der Steckkontaktelemente liegen auf Grund dieser federnden Ausbildung unter Druck an den Innenwänden der durchkontaktierten Ausnehmungen der Schaltungsplatine an ("C-Pressung") und ergeben damit nicht nur einen ausgezeichneten elektrischen Kontakt sondern zugleich eine ausreichende Haltewirkung für die Schaltungsplatine.Known cable connectors for the use mentioned in accordance with the embodiment shown in FIG. 2 contain, as already described at the beginning, a circuit board 7 with electrical (for example resistors) and electro-optical (for example LEDs) components which on the through the tapered end sections 6 of the sockets 2 formed covenant rests. This design is also complex, both in terms of manufacture (tapered end sections 6) and in terms of assembly (soldered connection). Due to the advantageous development of the invention cited in claim 5, an extremely cost-effective connection is achieved, the end parts of the plug-in contact elements pressed into the plated-through recesses of the circuit board, the diameter of which is not reduced, and at the same time the circuit board can be used to simultaneously insert all cable cores into the insulation displacement sections of the connector without additional aids Pushing slots in and holding them. The contacting of the plug contact elements with the circuit board on the one hand and the cable cores on the other hand takes place in the same operation and thus requires minimal assembly effort.
The at the height of the slots in cross-section C-shaped connection-side end parts of the plug contact elements are due to this resilient design under pressure on the inner walls of the plated-through recesses of the circuit board ("C-pressing") and thus result not only in excellent electrical contact but at the same time sufficient holding effect for the circuit board.

Bei geradem Steckkontaktelement ist das angeschlossene Kabel unter 90° zu dessen Achsrichtung angeordnet und somit ein Winkelsteckverbinder gebildet. Eine Ausgestaltung der Steckkontaktelemente nach Anspruch 6 ermöglicht es auf einfache Weise, Kabelsteckverbinder mit zur Steckrichtung unter beliebigem Winkel verlaufender Kabeleinführung (z.B. bei einem Winkel von 90° auch "gerade" Kabelsteckverbinder) herzustellen.In the case of a straight plug contact element, the connected cable is arranged at 90 ° to its axial direction, thus forming an angled plug connector. An embodiment of the plug contact elements according to claim 6 makes it possible in a simple manner to produce cable plug connectors with a cable entry extending at any angle to the plug direction (for example at an angle of 90 ° also "straight" cable plug connectors).

Die Figur 1 zeigt ein Ausführungsbeispiel erfindungsgemäßer Steckkontaktelemente bei einem mehrpoligen Winkelsteckverbinder für Näherungsschalter in teilweise geschnittener Ansicht.FIG. 1 shows an exemplary embodiment of plug contact elements according to the invention in a multipole angle connector for proximity switches in a partially sectioned view.

Der Winkelsteckverbinder 10 weist einen Kontaktträger 11 mit darin eingepreßten zylindrischen Steckbuchsen 12 und eine Leiterplatine 13 auf, die mit elektrischen, z.B. Widerständen 14, und optoelektrischen Bauelementen, z.B. LEDs 15, zur Anzeige von Schaltzuständen beschaltet ist. Die Steckbuchsen 12 sind zum galvanischen Verbinden mit den als Litzen 16 ausgeführten Seelen der isolierten Kabeladern 17 eines mehradrigen Kabels 18 zum Anschluß an die Steckerstifte eines nicht dargestellten Näherungsschalters sowie an die zugehörigen Kontakte der Leiterplatine 13 vorgesehen. Für den zuletzt genannten Zweck sind die Steckbuchsen 12 in durchkontaktierte Ausnehmungen 19 der Leiterplatine 13 eingepreßt - eine im Vergleich zum Anschluß durch Lötung oder Verbindungsleitungen besonders kostengünstige Lösung.The angled connector 10 has a contact carrier 11 with cylindrical sockets 12 pressed therein and a printed circuit board 13 which is connected to electrical, e.g. Resistors 14, and optoelectric devices, e.g. LEDs 15, is connected to display switching states. The sockets 12 are provided for the galvanic connection to the cores of the insulated cable cores 17 of a multi-core cable 18 designed as strands 16 for connection to the plug pins of a proximity switch (not shown) and to the associated contacts of the printed circuit board 13. For the last-mentioned purpose, the sockets 12 are pressed into plated-through recesses 19 in the printed circuit board 13 - a particularly cost-effective solution in comparison to connection by soldering or connecting lines.

Zur Befestigung des Winkelsteckverbinders 10 am Steckanschluß des Näherungsschalters ist eine Überwurfmutter 20 mit Griffrändel 21 vorgesehen, die mit einem Kragen 22 einen Ringbund 23 des Kontaktträgers 11 hintergreift.To fasten the angle connector 10 to the plug connection of the proximity switch, a union nut 20 with a knurled grip 21 is provided, which engages behind a collar 22 of an annular collar 23 of the contact carrier 11.

Die Steckbuchsen 12 bestehen jeweils aus einem steckseitigen Buchsenteil 24 sowie einem anschlußseitigen Endteil 25, in dem eine axiale Sackbohrung 26 und ein Schlitz 27 in der Bohrungswand 28 angebracht sind. Der Schlitz 27, dessen Länge geringer ist als die der Sackbohrung 26, weist einen anschlußseitigen Führungsabschnitt 29 mit Schneidzone 30 sowie einen sich daran anschließenden Schneidklemmabschnitt 31 auf. Die Breite des Führungsabschnittes 29 ist geringfügig kleiner als der Außendurchmesser der Kabeladern 17, die Breite des Schneidklemmabschnittes 31 geringer als der Durchmesser der Litzen 16. Die Sackbohrung 26 weist einen steckseitigen Bereich 32 und einen anschlußseitigen Bereich 33 auf, wobei letzterer im Durchmesser geringfügig größer ist als der steckseitige Bereich 32 und sich zur Erleichterung der Kabeleinführung im Bereich des Schlitzes 27 konisch zum freien Ende der Steckbuchse 12 hin erweitert. Durch die unterschiedlichen Durchmesser der Bereiche 32 und 33 ist ein schmaler Ringbund (34) gebildet.The sockets 12 each consist of a plug-side socket part 24 and a connection-side end part 25, in which an axial blind bore 26 and a slot 27 are made in the bore wall 28. The slot 27, the length of which is shorter than that of the blind bore 26, has a connection-side guide section 29 with a cutting zone 30 and an insulation displacement section 31 adjoining it. The width of the guide section 29 is slightly smaller than the outer diameter of the cable cores 17, the width of the insulation displacement section 31 is smaller than the diameter of the strands 16. The blind bore 26 has a plug-side area 32 and a connection-side area 33, the latter being slightly larger in diameter as the plug-in area 32 and, in order to facilitate the cable entry in the area of the slot 27, widens conically towards the free end of the socket 12. The different diameters of the areas 32 and 33 form a narrow ring collar (34).

Der Anschluß der isolierten Kabeladern 17 und zugleich ihre Zugentlastung ist durch den beschriebenen erfindungsgemäßen Aufbau der Steckbuchse 12 auf folgende Weise besonders einfach und kostengünstig herzustellen:
Jede Kabelader 17 wird zunächst bis zum Ringbund 34 in die Sackbohrung 26 eingeführt, was durch den konischen Einführungstrichter, dessen kleinster Durchmesser (der dem Durchmesser des nachfolgenden zylindrischen Teils des anschlußseitigen Bereiches des Sackloches 26 entspricht) noch ein wenig größer ist als der Aderndurchmesser, besonders leicht und schnell erfolgen kann. Hierauf wird die Kabelader um etwa 90° in den Führungsabschnitt 29 des Schlitzes 27 hinein abgebogen und durch die beschriebenen Abmessungen darin leicht geklemmt (vorfixiert). Daraufhin wird die Leiterplatine 13 mit ihren durchkontaktierten Ausnehmungen 19 auf die anschlußseitigen Endteile 25 der Steckbuchsen 12 aufgeschoben. Dabei erfolgt einerseits durch den Federdruck des im Bereich des Schlitzes 27 im Querschnitt C-förmigen anschlußseitigen Endteils 25 ein dauerhaft sicherer Kontakt durch sogenannte "C-Pressung" sowie eine feste Halterung der Leiterplatine 13. Zum andern werden hierbei durch die steckseitige Fläche 35 der Leiterplatine 13 sämtliche Kabeladern 17 zugleich weiter in den Schlitz hineingedrückt, wobei zunächst in der Schneidzone 30 der Isoliermantel der Kabeladern 17 durchtrennt und anschließend die Litzen 16 derart in den Schneidklemmabschnitt 31 eingepreßt werden, daß sie großflächig unter Druck an deren Seitenkanten anliegen und somit einen dauerhaft sicheren Kontakt gewährleisten. Zugleich wird bei diesem Vorgang das freie Ende jeder Kabelader 17 fast vollständig in die Sackbohrung 26 eingeführt. Ohne irgendeine Hilfsvorrichtung oder besondere Arbeitsgänge ist somit eine äußerst einfache Montage ermöglicht.The connection of the insulated cable cores 17 and at the same time their strain relief is particularly simple and inexpensive to manufacture in the following manner due to the construction of the socket 12 according to the invention:
Each cable wire 17 is first inserted into the blind bore 26 up to the annular collar 34, which is a little larger than the wire diameter due to the conical insertion funnel, the smallest diameter (which corresponds to the diameter of the subsequent cylindrical part of the connection-side region of the blind hole 26) can be done easily and quickly. The cable core is then bent through approximately 90 ° into the guide section 29 of the slot 27 and slightly clamped (pre-fixed) therein by the dimensions described. Then the circuit board 13 with its plated-through recesses 19 is pushed onto the connection-side end parts 25 of the sockets 12. On the one hand, due to the spring pressure of the connection-side end part 25 with a cross-section C-shaped in cross-section 27, so-called "C-pressing" as well as a firm mounting of the printed circuit board 13. On the other hand, through the plug-side surface 35 of the printed circuit board 13 at the same time all the cable wires 17 are pushed further into the slot, the insulating jacket of the cable wires 17 first being cut in the cutting zone 30 and then the strands 16 being pressed into the insulation displacement section 31 in such a way that they rest under pressure over a large area on their side edges and thus are permanently secure Ensure contact. At the same time, the free end of each cable wire 17 is almost completely inserted into the blind bore 26 in this process. An extremely simple assembly is thus possible without any auxiliary device or special operations.

Die abgewinkelten Aderenden bewirken zusammen mit den in den Schlitzen 27 gehaltenen Kabeladern 17 darüberhinaus eine hohe Zugentlastung, die bei herkömmlichen Schneidklemmen nicht erreichbar ist. Diese hohe Zugfestigkeit ermöglicht es im Gegensatz zu diesen bekannten Schneidklemmen auch, eine direkte Umspritzung mit Kunststoff 36 trotz der dabei auftretenden hohen Kräfte vorzunehmen. Beim Ausführungsbeispiel ist der Kunststoff 36 im selben Arbeitsgang auch durch einen Kanal im Kontaktträger 11 geführt und bildet dabei eine Dichtung 37. In vorteilhafter Weise wird dadurch die Bereitstellung und Montage eines gesonderten Dichtrings vermieden.The angled wire ends, together with the cable wires 17 held in the slots 27, furthermore result in a high strain relief, which cannot be achieved with conventional insulation displacement terminals. In contrast to these known insulation displacement clamps, this high tensile strength also makes it possible to carry out a direct encapsulation with plastic 36 in spite of the high forces occurring in the process. In the exemplary embodiment, the plastic 36 is also guided through a channel in the contact carrier 11 in the same working step and thereby forms a seal 37. This advantageously avoids the provision and assembly of a separate sealing ring.

Durch die im Vergleich zu üblichen Schneidklemmen nicht vorhandenen überstehenden Adernenden sind zudem beliebige Anordnungen der Steckbuchsen 12 auf engstem Raum möglich, ein Vorteil, der besonders bei Steckverbindern zum Tragen kommt, die ja stets so klein wie möglich sein sollen. Außerdem ist bei der erfindungsgemäßen Ausbildung der Steckkontaktelemente ohne irgendwelche besonderen Maßnahmen im Gegensatz zum Stand der Technik sichergestellt, daß keine vagabundierenden Litzendrähte und damit auch keine Kurzschlüsse oder Veränderungen der vorgeschriebenen Luft- und Kriechstrecken zwischen spannungsführenden Teilen auftreten können. Insgesamt ist durch die erfingungsgemäß ausgebildeten Steckbuchsen ein Kabelsteckverbinder geschaffen, der nicht nur in Aufbau und Herstellung äußerst kostengünstig ist, sondern darüber hinaus - wie beschrieben - eine Reihe von Vorteilen aufweist, die besonders für Massenartikel wie Steckverbinder bedeutsam sind.The protruding wire ends, which are not available in comparison to conventional insulation displacement terminals, also make it possible to arrange the sockets 12 in a confined space, an advantage which is particularly important in the case of connectors, which should always be as small as possible. In addition, in the embodiment of the plug-in contact elements according to the invention, without any special measures, in contrast to the prior art, it is ensured that no stray wire strands and thus also no short circuits or changes in the prescribed air and creepage distances between live parts can occur. Overall, the plug-in receptacles designed in accordance with the invention create a cable connector which is not only extremely cost-effective in terms of construction and manufacture, but also - as described - has a number of advantages which are particularly important for bulk articles such as connectors.

Claims (6)

  1. Plug-in contact member for cable plug-in connector (10), having a plug-in side end part (24) and a connection side end part (25) comprising an axial blind bore (26) for the purpose of providing an electrical connection to and mechanically holding a lead (17) consisting of an electrically conductive core (16) and an insulating sleeve encompassing said core, characterised in that a single insulation displacement slot (27) is provided in the bore wall (28) formed by the axial blind bore (26) so that an end part of the connected lead (17) can be inserted into the blind bore (26) and a connected part, which is angled around approximately 90°, of the lead (17) can be inserted into the insulation displacement slot (27).
  2. Cable plug-in connector comprising a plug-in contact member according to claim 1, characterised in that the width of the guide portion (29) is slightly smaller than the outer diameter of the insulated lead (17).
  3. Plug-in contact member according to claim 1 or 2, characterised in that the blind bore (26) comprises a plug-in side region (32) and a connection side region (33), that the diameter of the plug-in side region (32) is slightly smaller than that of the connection side region (33) and that the length of the plug-in side region (32) corresponds approximately to the length of the insulation displacement portion (31) of the slot (27).
  4. Cable plug-in connector comprising a plug-in contact member according to any one of claims 1 to 3, characterised in that at least one part of the connection side region (33) of the blind bore (26) tapers inwards in a conical manner and the diameter of said bore at the open end is larger than the outer diameter of the insulated lead (17).
  5. Cable plug-in connector comprising a plug-in contact member according to any one of claims 1 to 4, characterised in that the length of the slot (27) is such that when the lead (17) is pushed into the insulation displacement portion (31) the length of the free connection side end part corresponds at least to the thickness of a printed circuit board (13) which is disposed in the cable plug-in connector and lies with the plug-in side surface (35) against the lead (17) and that the outer dimensions of the connection side end part (25) are tailored to suit the inner contour of the through-contacted cut-outs (19) of the printed circuit board (13).
  6. Plug-in contact member according to any one of claims 1 to 5, characterised in that it is angled between the blind bore (26) and the plug-in part (24).
EP93110417A 1992-07-10 1993-06-30 Plug contact element Expired - Lifetime EP0578118B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4222685A DE4222685C2 (en) 1992-07-10 1992-07-10 Plug contact element
DE4222685 1992-07-10

Publications (2)

Publication Number Publication Date
EP0578118A1 EP0578118A1 (en) 1994-01-12
EP0578118B1 true EP0578118B1 (en) 1997-10-15

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EP93110417A Expired - Lifetime EP0578118B1 (en) 1992-07-10 1993-06-30 Plug contact element

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EP (1) EP0578118B1 (en)
JP (1) JP2739867B2 (en)
AT (1) ATE159381T1 (en)
DE (2) DE4222685C2 (en)
DK (1) DK0578118T3 (en)

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DE4406625C1 (en) * 1994-03-01 1995-08-10 Kostal Leopold Gmbh & Co Kg Electrical plug-connector with moulding in circuit board
DE19516936C2 (en) * 1995-05-09 2003-07-17 Conti Temic Microelectronic Method of manufacturing a metal housing with a plug socket
DE29806645U1 (en) * 1998-04-11 1998-08-13 Phoenix Contact Gmbh & Co., 32825 Blomberg Cable connector
DE19934158A1 (en) * 1999-07-21 2001-02-08 Hirschmann Richard Gmbh Co Device for connecting conductor to contact part, has clamp element for clamped contact of conductor, welded joint on clamp element, and insulating sleeve penetrated by clamp element parts
DE10140910C2 (en) * 2001-08-21 2003-07-17 Lumberg Automation Components Electrical connector
DE102009049724A1 (en) * 2009-10-17 2011-04-28 Kmi-Holding Gmbh Method for producing plug connector device in automobile area, involves overmolding unit partially by another unit, and moving retaining unit to occupy retaining unit area, where retaining unit is integrally formed with evaluator unit
DE102017120180B3 (en) * 2017-09-01 2019-01-03 HARTING Electronics GmbH Angled connector
US10992080B2 (en) * 2017-09-22 2021-04-27 Harting Electric Gmbh & Co. Kg High-current connector comprising an insulating bush
CN107946792B (en) * 2017-10-10 2019-08-06 国网浙江省电力公司湖州供电公司 A secondary equipment voltage test connection terminal

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FR2498822A1 (en) * 1981-01-28 1982-07-30 Bonhomme F R SELF-CONDUCTING ELECTRICAL CONTACT, METHOD FOR MANUFACTURING THIS CONTACT AND CONNECTORS INCLUDING THIS CONTACT, IN PARTICULAR FOR TABLECLOTH CABLES
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DE9205977U1 (en) * 1992-05-02 1992-06-17 Richard Hirschmann GmbH & Co, 7300 Esslingen Multi-pin cable connector

Also Published As

Publication number Publication date
JPH06168747A (en) 1994-06-14
ATE159381T1 (en) 1997-11-15
DK0578118T3 (en) 1998-05-25
DE4222685A1 (en) 1994-01-13
DE59307532D1 (en) 1997-11-20
EP0578118A1 (en) 1994-01-12
DE4222685C2 (en) 1995-08-10
JP2739867B2 (en) 1998-04-15

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