EP0158845B2 - Socket with an insulation jacket and device for making it - Google Patents

Socket with an insulation jacket and device for making it Download PDF

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Publication number
EP0158845B2
EP0158845B2 EP85103143A EP85103143A EP0158845B2 EP 0158845 B2 EP0158845 B2 EP 0158845B2 EP 85103143 A EP85103143 A EP 85103143A EP 85103143 A EP85103143 A EP 85103143A EP 0158845 B2 EP0158845 B2 EP 0158845B2
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EP
European Patent Office
Prior art keywords
plug
connector
base member
area
connector socket
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
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EP85103143A
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German (de)
French (fr)
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EP0158845A3 (en
EP0158845A2 (en
EP0158845B1 (en
Inventor
Helmut Krell
Egon Kröpke
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Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co
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Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co
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Application filed by Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co filed Critical Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co
Publication of EP0158845A2 publication Critical patent/EP0158845A2/en
Publication of EP0158845A3 publication Critical patent/EP0158845A3/en
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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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • H01R43/24—Assembling by moulding on contact members
    • 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
    • H01R13/04—Pins or blades for co-operation with sockets
    • H01R13/05—Resilient pins or blades
    • H01R13/052—Resilient pins or blades co-operating with sockets having a circular transverse section

Definitions

  • the invention relates to a plug socket for plug pins with a cylindrical, sleeve-shaped base body, a partial surface of the base body wall being bent into the base body cavity about a bending line extending approximately at right angles to the plug-in axis and with its entire edge resting as a locking disk on the inner wall of the base body cavity, with one Basic body adjacent conductor connection area, with a contact surface for the connector pin and with an encapsulated insulating material coating; the invention further relates to a device for producing such a socket.
  • Such sockets are mainly found in small device plugs, e.g. for shavers, use and must be well protected against the ingress of moisture and very often be connected to a corresponding plug pin and be detachable from it.
  • the insulating material sheath usually serves at the same time as a handle for connecting and disconnecting the plug connection, from which only the sheathed area of the connecting cable protrudes.
  • plug sockets are usually stamped in one piece from endless material webs and are subsequently produced from the blank (stamped part) by one or more bending processes.
  • the sleeve area of the plug socket, together with the contact area, forms a uniform cavity with a plurality of openings through which the insulating material penetrates when the socket is sheathed in an injection molding process and can thus also reach the contact area.
  • US-A-3 185 953 discloses a specially designed plug socket of the type specified at the beginning, in which a socket connection has a sleeve-shaped base body with a D-shaped cross section. This sleeve-shaped base body is followed by a conductor connection area which is in electrical contact with the stripped end of a cable. Both the sleeve-shaped base body and the conductor connection area with the stripped cable end are encapsulated with an insulating material jacket.
  • a cut-out partial surface of the base body is bent into the base body cavity and rests with its edge against the inner wall of the cavity in such a way that it acts as a locking disk.
  • a disadvantage of this known plug socket is that the blocking disk opens up at a high injection pressure of the insulating material and thus causes leaks. Leaks also occur if the circumferential contour of the locking disk is outside the tolerance limits. Finally, it is a disadvantage of the known plug socket that large radial forces are exerted on the already bent locking disk during the bending process with which the sleeve-shaped base body is produced, which can lead to deformations.
  • DE-B-2 507 328 discloses a coaxial connector with a molded insulating jacket.
  • a semicircular cut is made at the rear ends of the pins forming the connector and the corresponding section is bent to close the open rear end of the respective pin, so that no insulating material can penetrate into the interior of the pins during the spraying process.
  • the locking disk will be pivoted at high spray pressure, with the consequence that leaks will occur.
  • the locking washer must be tight against the inner wall of the pin without the presence of tolerances. Finally, large radial forces occur on the already bent locking disk during the bending process.
  • DE-C-2 428 582 discloses a socket for an electrical connecting line, in which electrical contacts are inserted in corresponding recesses in a sleeve, both the sleeve and the contacts subsequently being provided with an insulating material coating by a corresponding injection process.
  • US-A-3 081 497 discloses an apparatus for producing molded plastic parts in which workpieces are partially anchored.
  • the workpieces have a continuous bore through which the plastic material would pass during the injection molding process.
  • a spray aid in the form of pins is provided, which are firmly embedded in the casting mold and which close the through openings of the workpieces with their front tip.
  • the object of the invention is to further develop the known plug socket in such a way that it is possible to coat it with insulating material without problems, without the insulating material penetrating into the area of the contact surfaces despite the locking disk; in addition, a device for the simple manufacture of such sockets with an im Injection molding manufactured casing are provided.
  • the invention proposes that at least a portion of the edge of the partial surface be held in a groove provided in the inner wall of the base body and that the base body be arranged between the conductor connection region and the contact surface that can be pressed onto the plug pin.
  • the edge of the partial surface is held in a groove in the base body, particularly good sealing against sprayed insulating material is achieved.
  • tolerances between the partial surface serving as a locking disk and the base body can thus be absorbed.
  • Another advantage of this groove is that during the bending process with which the sleeve-shaped base body is produced, excessive radial forces are not exerted on the already bent-over part surface forming the locking disk; the groove can namely have an oversize, so that elastic, radial deformation forces are not or only incompletely transmitted to the locking disk on the outer wall of the base body.
  • the partial surface forming the locking disk has a hole which is concentric with the contact surface, this can serve as a centering aid for a spraying aid described below.
  • the cross-sectional area of such a hole is preferably smaller than the plug passage area spanned by the contact area; the edge of the locking disk surrounding the hole then serves to support the spraying aid in the axial direction.
  • the plug socket can be surrounded by a sleeve with a plug passage opening which is pushed over the base body in the plug-in direction and positively abuts against it.
  • the spring elements of the plug socket which have the contact surfaces on their inner surface are also kept free of the insulating material in the region of their outwardly facing surface.
  • no insulating material can then penetrate into the opening in the base body wall which is inevitably formed by the bending of the locking disk.
  • the use of the aforementioned sleeve is not absolutely necessary.
  • the decisive factor in ensuring that the contact surfaces remain free of the insulating material is the locking disk provided according to the invention, which prevents the insulating material from axially entering the socket from the rear.
  • the insulating material when radially penetrating into the socket, does not succeed in inserting itself between the contact surface and a plug pin inserted before the sheathing process.
  • the invention is achieved with respect to a device for producing the insulating material sheathing of a plug socket according to the invention in the injection molding process by a plug pin arranged in the injection mold coaxially to the plug axis of the plug socket and suitable for the plug socket as a plug-in aid.
  • This plug pin therefore covers the contact surfaces of the socket. This cover is maintained throughout the injection molding process.
  • the spraying aid has a conical end region outside the plug socket, this makes it easier to center the plug pin when it is inserted into the plug socket.
  • the spray aid preferably has a centering tip with an adjoining stop surface, the centering tip fitting into the hole in the partial surface of the plug socket forming the locking disk and the stop surface defining the axial end position of the spray aid.
  • the plug socket according to the invention and the device for its production, it has been possible for the first time to coat the plug socket with insulating material in a simple manner, in particular by injection molding, without the contact surfaces coming into contact with the insulating material.
  • a plug socket according to the invention has a sleeve-shaped base body 1 on which Sen end faces connect on the one hand a conductor connection area 2 and on the other hand a contact area 3.
  • the conductor connection area 2 consists in a known manner of a crimp area 4 for contacting a conductor wire 6 and a crimp area 5 for clamping an insulating jacket 7 of the conductor wire 6.
  • the contact area 3 has spring arms 8, the inner surfaces of which form the contact surfaces 9 for a plug pin.
  • the base body 1 can - as shown - consist of a cylindrical sleeve with a longitudinal slot 10.
  • Such a one-piece plug socket is produced by first punching out a corresponding surface pattern from a flat material and then bending it to form the plug socket.
  • the plug socket according to the invention now arises from the fact that, when punching out the sheet material in the area of the base body wall, a partial surface 11 is cut free in such a way that an area 12 of the edge of the partial surface 11 remains connected to the base body wall and the outline of the partial surface 11 corresponds to the inner cross section of the finished bent part sleeve-shaped base body 1 corresponds as closely as possible.
  • the area 12 forms a bending line which extends approximately at right angles to the plug direction E of the plug socket.
  • the partial surface is bent into the later main body cavity 13 by approximately 90 °.
  • the remaining base body wall is then bent into the sleeve-shaped base body 1.
  • the base body wall lies radially against the partial surface 11, which can now fulfill its function as a locking disk - as described below.
  • the plug socket can be surrounded by a sleeve 17 with a plug passage opening 18 which is pushed over the base body 1 in the plug-in direction E and positively abuts thereon; in this case the conductor connection area 2 can remain uncovered by the sleeve 17.
  • the plug socket which has already been crimped to the conductor, is inserted into a corresponding injection mold from one end and pushed onto a plug pin 19 serving as a spraying aid.
  • This connector pin seals the connector passage opening 18 and thus prevents the insulation material of the insulation jacket 20 from penetrating.
  • the spear disk 11 can have a hole 21 which is concentric with the surface spanned by the contact surface 9 perpendicular to the insertion direction E.
  • a plug pin 22 serving as a spraying aid is inserted into this hole with its centering tip 23 until a stop surface 24 of the plug pin 22 abuts the edge of the hole 21.
  • the plug pin 22 can be part of an injection mold 25, into which it is inserted coaxially to the intended plug-in axis 26 and from which it protrudes, beginning with its conical end region 27.

Description

Steckerbuchse mit Isolierstoffummantelung sowie Vorrichtung für ihre HerstellungPlug socket with insulating material sheathing and device for its manufacture

Die Erfindung betrifft eine Steckerbuchse für Steckerstifte mit einem zylindrischen, hülsenförmigen Grundkörper, wobei eine Teilfläche der Grundkörperwand um eine etwa rechtwinklig zur Steckachse sich erstreckende Biegelinie in den Grundkörperhohlraum hineingebogen ist und als Sperrscheibe mit ihrem gesamten Rand an der Innenwand des Grundkörperhohlraumes anliegt, mit einem zum Grundkörper benachbarten Leiteranschlußbereich, mit einer Kontaktfläche für den Steckerstift sowie mit einer umspritzten Isolierstoffummantelung; die Erfindung betrifft ferner eine Vorrichtung zum Herstellen einer derartigen Steckerbuchse.The invention relates to a plug socket for plug pins with a cylindrical, sleeve-shaped base body, a partial surface of the base body wall being bent into the base body cavity about a bending line extending approximately at right angles to the plug-in axis and with its entire edge resting as a locking disk on the inner wall of the base body cavity, with one Basic body adjacent conductor connection area, with a contact surface for the connector pin and with an encapsulated insulating material coating; the invention further relates to a device for producing such a socket.

Solche Steckerbuchsen finden vor allem in Kleingerätesteckern, z.B. für Rasierapparate, Verwendung und müssen gegen das Eindringen von Feuchtigkeit gut geschützt sowie sehr häufig mit einem korrespondieren den Steckerstift verbindbar und von diesem wieder lösbar sein. Hierbei dient üblicherweise die Isolierstoffummantelung gleichzeitig als Handhabe zum Verbinden und Lösen der Steckverbindung, aus welcher lediglich der ummantelte Bereich des Anschlußkabels herausragt.Such sockets are mainly found in small device plugs, e.g. for shavers, use and must be well protected against the ingress of moisture and very often be connected to a corresponding plug pin and be detachable from it. In this case, the insulating material sheath usually serves at the same time as a handle for connecting and disconnecting the plug connection, from which only the sheathed area of the connecting cable protrudes.

Beim Umspritzen der Steckerbuchse mit der Isolierstoffummantelung ist darauf zu achten, daß die Kontaktflächen von dem Isolierstoff frei bleiben. Dies ist jedoch insofern schwierig, als Steckerbuchsen üblicherweise aus endlosen Materialbahnen einstückig ausgestanzt und anschließend aus dem Zuschnitt (Stanzteil) durch ein oder mehrere Biegevorgänge hergestellt werden. Der Hülsenbereich der Steckerbuchse bildet dabei zusammen mit dem Kontaktbereich einen einheitlichen Hohlraum mit mehreren Öffnungen, durch welche der Isolierstoff beim Ummanteln der Steckerbuchse im Spritzgußverfahren eindringen und somit auch bis in den Kontaktbereich gelangen kann.When encapsulating the socket with the insulating material, make sure that the contact surfaces remain free of the insulating material. However, this is difficult insofar as plug sockets are usually stamped in one piece from endless material webs and are subsequently produced from the blank (stamped part) by one or more bending processes. The sleeve area of the plug socket, together with the contact area, forms a uniform cavity with a plurality of openings through which the insulating material penetrates when the socket is sheathed in an injection molding process and can thus also reach the contact area.

Um diesem Problem abzuhelfen, ist in der US-A-3 185 953 eine speziell ausgebildete Steckerbuchse der eingangs angegebenen Art offenbart, bei dem ein Buchsenanschluß einen hülsenförmigen Grundkörper mit einem D-förmigen Querschnitt aufweist. An diesen hülsenförmigen Grundkörper schließt sich ein Leiteranschlußbereich an, welcher im elektrischen Kontakt mit dem abisolierten Ende eines Kabels steht. Sowohl der hülsenförmige Grundkörper als auch der Leiteranschlußbereich mit dem abisolierten Kabelende ist mit einer Isolierstoffummantelung umspritzt. Damit ins Innere des hülsenförmigen Grundkörpers kein Isolierstoffmaterial während des Spritzvorganges eindringt, ist eine ausgeschnittene Teifläche des Grundkörpers in den Grundkörperhohlraum hineingebogen und liegt derart mit ihrem Rand an der Innenwand des Hohlraumes an, daß sie als Sperrscheibe wirkt.In order to remedy this problem, US-A-3 185 953 discloses a specially designed plug socket of the type specified at the beginning, in which a socket connection has a sleeve-shaped base body with a D-shaped cross section. This sleeve-shaped base body is followed by a conductor connection area which is in electrical contact with the stripped end of a cable. Both the sleeve-shaped base body and the conductor connection area with the stripped cable end are encapsulated with an insulating material jacket. So that no insulating material penetrates into the interior of the sleeve-shaped base body during the spraying process, a cut-out partial surface of the base body is bent into the base body cavity and rests with its edge against the inner wall of the cavity in such a way that it acts as a locking disk.

Nachteilig bei dieser bekannten Steckerbuchse ist, daß bei einem hohen Einspritzdruck des Isolierstoffmaterials die Sperrscheibe aufklappt und somit Undichtigkeiten verursacht. Undichtigkeiten treten auch dann auf, wenn die Umfangskontur der Sperrscheibe außerhalb der Toleranzgrenzen liegt. Schließlich ist bei der bekannten Steckerbuchse von Nachteil, daß beim Biegevorgang, mit dem der hülsenförmige Grundkörper hergestellt wird, große Radialkräfte auf die bereits umgebogene Sperrscheibe ausgeübt werden, was zu Deformationen führen kann.A disadvantage of this known plug socket is that the blocking disk opens up at a high injection pressure of the insulating material and thus causes leaks. Leaks also occur if the circumferential contour of the locking disk is outside the tolerance limits. Finally, it is a disadvantage of the known plug socket that large radial forces are exerted on the already bent locking disk during the bending process with which the sleeve-shaped base body is produced, which can lead to deformations.

In der DE-B-2 507 328 ist ein Koaxialstecker mit angegossener Isolierstoffumhüllung offenbart. Bei der Ausführungsform in Fig. 8 ist an den Hinterenden der den Stecker bildenden Stifte ein halbkreisförmiger Schnitt durchgeführt und der entsprechende Abschnitt zum Verschließen des offenen, hinteren Endes des jeweiligen Stiftes umgebogen, so daß während des Spritzvorganges kein Isolierstoffmaterial ins Innere der Stifte dringen kann. Auch hier besteht die Gefahr, daß die Sperrscheibe bei großem Spritzdruck verschwenkt wird mit der Konsequenz, daß Undichtigkeiten auftreten. Um darüber hinaus eine absolute Dichtigkeit zu gewährleisten, muß die Sperrscheibe ohne das Vorhandensein von Toleranzen eng an der Innenwand des Stiftes anliegen. Schließlich treten beim Biegevorgang große Radialkräfte auf die bereits umgebogene Sperrscheibe auf.DE-B-2 507 328 discloses a coaxial connector with a molded insulating jacket. In the embodiment in Fig. 8, a semicircular cut is made at the rear ends of the pins forming the connector and the corresponding section is bent to close the open rear end of the respective pin, so that no insulating material can penetrate into the interior of the pins during the spraying process. Here too there is a risk that the locking disk will be pivoted at high spray pressure, with the consequence that leaks will occur. In addition, to ensure absolute tightness, the locking washer must be tight against the inner wall of the pin without the presence of tolerances. Finally, large radial forces occur on the already bent locking disk during the bending process.

In der DE-C-2 428 582 ist eine Steckdose für eine elektrische Anschlußleitung offenbart, bei der in einer Hülse in entsprechenden Ausnehmungen elektrische Kontakte eingesetzt sind, wobei sowohl die Hülse als auch die Kontakte anschließend mit einer Isolierstoffummantelung durch einen entsprechenden Spritzvorgang versehen werden.DE-C-2 428 582 discloses a socket for an electrical connecting line, in which electrical contacts are inserted in corresponding recesses in a sleeve, both the sleeve and the contacts subsequently being provided with an insulating material coating by a corresponding injection process.

Die US-A-3 081 497 offenbart ein Vorrichtung zum Herstellen von Kunststofformteilen, in denen Werkstücke teilweise verankert sind. Bei der Ausführungsform in Fig. 7 weisen die Werkstücke dabei eine durchgehende Bohrung auf, durch die hindurch das Kunststoffmaterial während des Spritzvorganges hindurchtreten würde. Um dies zu vermeiden, ist eine Spritzhilfe in Form von Stiften vorgesehen, die fest in der Gießform eingebettet sind und mit ihrer vorderen Spitze die Durchgansöffnungen der Werkstücke verschließen.US-A-3 081 497 discloses an apparatus for producing molded plastic parts in which workpieces are partially anchored. In the embodiment in FIG. 7, the workpieces have a continuous bore through which the plastic material would pass during the injection molding process. To avoid this, a spray aid in the form of pins is provided, which are firmly embedded in the casting mold and which close the through openings of the workpieces with their front tip.

Ausgehend von der Steckerbuchse für Steckerstifte der eingangs angegebenen Art liegt der Erfindung die Aufgabe zugrunde, die bekannte Steckerbuchse derart weiterzuentwickeln, daß ein problemloses Ummanteln mit Isolierstoff möglich ist, ohne daß der Isolierstoff trotz der Sperrscheibe in den Bereich der Kontaktflächen vordringt; außerdem soll eine Vorrichtung zum einfachen Herstellen solcher Steckerbuchsen mit einer im Spritzgußverfahren hergestellten Ummantelung bereitgestellt werden.Starting from the plug socket for plug pins of the type specified at the outset, the object of the invention is to further develop the known plug socket in such a way that it is possible to coat it with insulating material without problems, without the insulating material penetrating into the area of the contact surfaces despite the locking disk; in addition, a device for the simple manufacture of such sockets with an im Injection molding manufactured casing are provided.

Als technische Lösung wird mit der Erfindung vorgeschlagen, daß zumindest ein Teilbereich des Randes der Teilfläche in einer in der Innenwand des Grundkörpers vorgesehenen Rille gehalten ist und daß der Grundkörper zwischen dem Leiteranschlußbereich und der an den Steckerstift andrückbaren Kontaktfläche angeordnet ist.As a technical solution, the invention proposes that at least a portion of the edge of the partial surface be held in a groove provided in the inner wall of the base body and that the base body be arranged between the conductor connection region and the contact surface that can be pressed onto the plug pin.

Dadurch, daß zumindest ein Teilbereich des Randes derTeifläche in einer Rille des Grundkörpers gehalten ist, wird eine besonders gute Dichtigkeit gegen gespritztes Isolierstoffmaterial erreicht. Außerdem können somit Toleranzen zwischen der als Sperrscheibe dienenden Teilfläche und dem Grundkörper aufgefangen werden. Ein weiterer Vorteil dieser Rille besteht darin, daß bei dem Biegevorgang, mit dem der hülsenförmige Grundkörper hergestellt wird, keine zu großen radialen Kräfte auf die bereits umgebogene, die Sperrscheibe bildenden Teilfläche ausgeübt werden; die Rille kann nämlich ein Übermaß aufweisen, so daß elastische, radiale Verformungskräfte auf die Außenwand des Grundkörpers nicht oder nur unvollständig auf die Sperrscheibe übertragen werden.Because at least a portion of the edge of the partial surface is held in a groove in the base body, particularly good sealing against sprayed insulating material is achieved. In addition, tolerances between the partial surface serving as a locking disk and the base body can thus be absorbed. Another advantage of this groove is that during the bending process with which the sleeve-shaped base body is produced, excessive radial forces are not exerted on the already bent-over part surface forming the locking disk; the groove can namely have an oversize, so that elastic, radial deformation forces are not or only incompletely transmitted to the locking disk on the outer wall of the base body.

Wenn gemäß einer Weiterbildung der Erfindung die die Sperrscheibe bildende Teilfläche ein zu der Kontaktfläche konzentrisches Loch aufweist, kann dieses als Zentrierhilfe für eine weiter unten beschriebene Spritzhilfe dienen. Die Querschnittsfläche eines solchen Loches ist bevorzugt kleiner als die von der Kontaktfläche aufgespannte Steckerdurchtrittsfläche; der das Loch umgebende Rand der Sperrscheibe dient dann zur Abstützung der Spritzhilfe in axialer Richtung.If, according to a development of the invention, the partial surface forming the locking disk has a hole which is concentric with the contact surface, this can serve as a centering aid for a spraying aid described below. The cross-sectional area of such a hole is preferably smaller than the plug passage area spanned by the contact area; the edge of the locking disk surrounding the hole then serves to support the spraying aid in the axial direction.

Gemäß einer anderen Weiterbildung der Erfindung kann die Steckerbuchse von einer in Steckrichtung über den Grundkörper geschobenen und formschlüssig daran anliegenden Hülse mit einer Steckerdurchtrittsöffnung umgeben sein. Hierdurch werden die die Kontakflächen auf ihrer inneren Oberfläche aufweisenden Federelemente der Steckerbuchse auch im Bereich ihrer nach außen weisenden Oberfläche von dem Isolierstoffmaterial freigehalten. Ebenso kann dann in die zwangsläufig durch das Umbiegen der Sperrscheibe gebildete Öffnung in der Grundkörperwand kein Isolierstoffmaterial eindringen.According to another development of the invention, the plug socket can be surrounded by a sleeve with a plug passage opening which is pushed over the base body in the plug-in direction and positively abuts against it. As a result, the spring elements of the plug socket which have the contact surfaces on their inner surface are also kept free of the insulating material in the region of their outwardly facing surface. Likewise, no insulating material can then penetrate into the opening in the base body wall which is inevitably formed by the bending of the locking disk.

Überraschenderweise hatsich aber gezeigt, daß die Verwendung der vorerwähnten Hülse nicht zwingend erforderlich ist. Entscheidend dafür, daß die Kontaktflächen frei von dem Isolierstoffmaterial bleiben, ist nämlich die erfindungsgemäß vorgesehene Sperrscheibe, die ein axiales Eintreten des Isolierstoffmaterials von hinten in die Steckerbuchse verhindert. Überraschenderweise gelingt es dem Isolierstoffmaterial nämlich bei radialem Eindringen in die Steckerbuchse nicht, sich zwischen die Kontaktfläche und einen vor dem Ummantelungsprozeß eingeschobenen Steckerstift zu schieben.Surprisingly, however, it has been shown that the use of the aforementioned sleeve is not absolutely necessary. The decisive factor in ensuring that the contact surfaces remain free of the insulating material is the locking disk provided according to the invention, which prevents the insulating material from axially entering the socket from the rear. Surprisingly, the insulating material, when radially penetrating into the socket, does not succeed in inserting itself between the contact surface and a plug pin inserted before the sheathing process.

Die Erfindung wird hinsichtlich einer Vorrichtung zum Herstellen der Isolierstoffummantelung einer erfindungsgemäßen Steckerbuchse im Spritzgußverfahren durch einen in der Spritzgußform koaxial zur Steckachse der Steckerbuchse angeordneten, für die Steckerbuchse passenden Steckerstift als Steckhilfe gelöst. Dieser Steckerstift deckt also die Kontaktflächen der Steckerbuchse ab. Diese Abdeckung wird während des ganzen Spritzgußvorganges beibehalten.The invention is achieved with respect to a device for producing the insulating material sheathing of a plug socket according to the invention in the injection molding process by a plug pin arranged in the injection mold coaxially to the plug axis of the plug socket and suitable for the plug socket as a plug-in aid. This plug pin therefore covers the contact surfaces of the socket. This cover is maintained throughout the injection molding process.

Wenn die Spritzhilfe, gemäß einer Weiterbildung der Erfindung, einen konischen Endbereich außerhalb der Steckerbuchse aufweist, wird hierdurch das Zentrieren des Steckerstiftes beim Einsetzen in die Steckerbuchse erleichtert.If, according to a further development of the invention, the spraying aid has a conical end region outside the plug socket, this makes it easier to center the plug pin when it is inserted into the plug socket.

Bevorzugt weist die Spritzhilfe eine Zentrierspitze mit anschließender Anschlagfläche auf, wobei die Zentrierspitze in das Loch der die Sperrscheibe bildenden Teilfläche der Steckerbuchse hineinpaßt und die Anschlagfläche die axiale Endlage der Spritzhilfe festlegt.The spray aid preferably has a centering tip with an adjoining stop surface, the centering tip fitting into the hole in the partial surface of the plug socket forming the locking disk and the stop surface defining the axial end position of the spray aid.

Mit der erfindungsgemäßen Steckerbuchse und der Vorrichtung für ihre Herstellung ist es erstmals gelungen, auf einfache Weise, insbesondere im Spritzgußverfahren, die Steckerbuchse mit Isolierstoff zu ummanteln, ohne daß die Kontaktflächen mit dem Isolierstoff in Berührung kommen.With the plug socket according to the invention and the device for its production, it has been possible for the first time to coat the plug socket with insulating material in a simple manner, in particular by injection molding, without the contact surfaces coming into contact with the insulating material.

Weitere Einzelheiten, Merkmale und Vorteile des Gegenstandes der Erfindung ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Zeichnung, in der zwei bevorzugte Ausführungsformen einer erfindungsgemäßen Steckerbuchse dargestellt worden sind. In der Zeichnung zeigen:

Figure imgb0001
Further details, features and advantages of the subject matter of the invention result from the following description of the associated drawing, in which two preferred embodiments of a plug socket according to the invention have been shown. The drawing shows:
Figure imgb0001

Gemäß Fig. 1 weist eine erfindungsgemäße Stekkerbuchse einen hülsenförmigen Grundkörper 1 auf, an dessen Stirnseiten sich einerseits ein Leiteranschlußbereich 2 und andererseits ein Kontaktbereich 3 anschließen. Der Leiteranschlußbereich 2 besteht in bekannter Weise aus einem Crimpbereich 4 zum Kontaktieren eines Leiterdrahtes 6 und einem Crimpbereich 5 zum Festklemmen eines Isoliermantels 7 des Leiterdrahtes 6. Der Kontaktbereich 3 weist Federarme 8 auf, deren innere Oberflächen die Kontaktflächen 9 für einen Steckerstift bilden.1, a plug socket according to the invention has a sleeve-shaped base body 1 on which Sen end faces connect on the one hand a conductor connection area 2 and on the other hand a contact area 3. The conductor connection area 2 consists in a known manner of a crimp area 4 for contacting a conductor wire 6 and a crimp area 5 for clamping an insulating jacket 7 of the conductor wire 6. The contact area 3 has spring arms 8, the inner surfaces of which form the contact surfaces 9 for a plug pin.

Der Grundkörper 1 kann - wie dargestellt - aus einer zylindrischen Hülse mit Längsschlitz 10 bestehen. Eine solche einstückige Steckerbuchse wird dadurch hergestellt, daß zunächst ein entsprechendes Flächenmuster aus einem Flachmaterial ausgestanzt und dann zu der Steckerbuchse gebogen wird. Die erfindungsgemäße Steckerbuchse entsteht nun dadurch, daß beim Ausstanzen aus dem Flächenmaterial im Bereich der Grundkörperwand eine Teilfläche 11 derart freigeschnitten wird, daß ein Bereich 12 des Randes der Teilfläche 11 mit der Grundkörperwand verbunden bleibt und der Grundriß der Teilfläche 11 dem inneren Querschnitt des fertig gebogenen hülsenförmigen Grundkörpers 1 möglichst genau entspricht. Der Bereich 12 bildet eine Biegelinie, die sich etwa rechtwinklig zur Steckrichtung E der Steckerbuchse erstreckt. An dieser Biegelinie wird die Teilfläche um etwa 90° in den späteren Grundkörperhohlraum 13 hineingebogen. Danach wird die restliche Grundkörperwand zu dem hülsenförmigen Grundkörper 1 gebogen. Hierbei legt sich die Grundkörperwand radial an die Teilfläche 11 an, welche nunmehr ihre Funktion als Sperrscheibe - wie nachfolgend beschrieben - erfüllen kann.The base body 1 can - as shown - consist of a cylindrical sleeve with a longitudinal slot 10. Such a one-piece plug socket is produced by first punching out a corresponding surface pattern from a flat material and then bending it to form the plug socket. The plug socket according to the invention now arises from the fact that, when punching out the sheet material in the area of the base body wall, a partial surface 11 is cut free in such a way that an area 12 of the edge of the partial surface 11 remains connected to the base body wall and the outline of the partial surface 11 corresponds to the inner cross section of the finished bent part sleeve-shaped base body 1 corresponds as closely as possible. The area 12 forms a bending line which extends approximately at right angles to the plug direction E of the plug socket. At this bending line, the partial surface is bent into the later main body cavity 13 by approximately 90 °. The remaining base body wall is then bent into the sleeve-shaped base body 1. Here, the base body wall lies radially against the partial surface 11, which can now fulfill its function as a locking disk - as described below.

Bevorzugt ist der Rand 14 der Teilfläche (Sperrscheibe) 11 in einer in der Innenwand 15 z. B. durch Einprägen vorgesehenen Rille 16 gehalten.Preferably, the edge 14 of the partial surface (locking disk) 11 in a in the inner wall 15 z. B. held by embossed groove 16.

Gemäß Fig. 4 kann die Steckerbuchse von einer in Steckrichtung E über den Grundkörper 1 geschobenen und formschlüssig daran anliegenden Hülse 17 mit einer Steckerdurchtrittöffnung 18 umgeben sein; hierbei kann der Leiteranschlußbereich 2 von der Hülse 17 unbedeckt bleiben. Beim Ummanteln der Steckerbuchse mit Isolierstoff ist die mit dem Leiter bereits vercrimpte Steckerbuchse in eine entsprechende Spritzgußform von einem Ende her eingeführt und auf einen als Spritzhilfe dienenden Steckerstift 19 aufgeschoben. Dieser Steckerstift dichtet die Steckerdurchtrittöffnung 18 ab und verhindert somit ein Eindringen des Isolierstoffmaterials der Isolierstoffummantelung 20.According to FIG. 4, the plug socket can be surrounded by a sleeve 17 with a plug passage opening 18 which is pushed over the base body 1 in the plug-in direction E and positively abuts thereon; in this case the conductor connection area 2 can remain uncovered by the sleeve 17. When sheathing the plug socket with insulating material, the plug socket, which has already been crimped to the conductor, is inserted into a corresponding injection mold from one end and pushed onto a plug pin 19 serving as a spraying aid. This connector pin seals the connector passage opening 18 and thus prevents the insulation material of the insulation jacket 20 from penetrating.

Wie sich aus den Fig. 5 bis 8 ergibt, kann die Speerrscheibe 11 ein zu der von der Kontaktfläche 9 senkrecht zur Steckrichtung E aufgespannten Fläche konzentrisches Loch 21 aufweisen. In dieses Loch wird - in ähnlicher Weise wie mit Fig. 4 beschrieben - ein als Spritzhilfe dienender Stekkerstift 22 mit seiner Zentrierspitze 23 so weit eingeführt, bis eine Anschlagfläche 24 des Steckerstiftes 22 am Rand des Loches 21 anliegt. Der Steckerstift 22 kann Bestandteil einer Spritzgußform 25 sein, in die er koaxial zur vorgesehenen Steckachse 26 eingesetzt ist und aus der er, beginnend mit seinem konischen Endbereich 27, herausragt.As can be seen from FIGS. 5 to 8, the spear disk 11 can have a hole 21 which is concentric with the surface spanned by the contact surface 9 perpendicular to the insertion direction E. In a similar manner to that described in FIG. 4, a plug pin 22 serving as a spraying aid is inserted into this hole with its centering tip 23 until a stop surface 24 of the plug pin 22 abuts the edge of the hole 21. The plug pin 22 can be part of an injection mold 25, into which it is inserted coaxially to the intended plug-in axis 26 and from which it protrudes, beginning with its conical end region 27.

Claims (7)

1. Connector socket for connector pins with a cylindrical, sleeve-shaped base member (1), in which a partial surface (11) of the base member wall is bent into the base member cavity (13) about a bending line (12) extending approximately at a right angle to the plug-in axis (E) and bears via its entire edge (14) against the inner wall (15) of the base member cavity (13) as a locking disc, with a conductor connection area (2) adjacent to the base member (1), with a contact surface (9) for the connector pin and with a surrounding injection-moulded insulating sheath (20), characterised in that at least a partial area of the edge (14) of the partial surface (11) is held in a groove (16) provided in the inner wall (15) of the base member (1), and that the base member (1) is arranged between the conductor connection area (2) and the contact surface (9), which can be pressed against the connector pin.
2. Connector socket according to claim 1, characterised in that the partial surface (11) comprises a hole (21) which is concentric with the area enclosed by the contact surface (9) at a right angle to the plug-in direction (E).
3. Connector socket according to claim 2, characterised in that the sectional area of the hole (21) is smaller than the connector passage area in the region of the contact surface (9).
4. Connector socket according to one of claims 1 to 3, characterised in that it is surrounded by a sleeve (17) which is pushed over the base member (1) in the plug-in direction (E), bears against the latter in a positive manner and comprises a connector through-opening (18).
5. Device for producing the insulating sheath of a connector socket according to claim 1 in an injection moulding operation, characterised by a connector pin (19, 22), which is arranged in the injection mould (25) coaxially with the plug-in axis (26) of the connector socket and is adapted to the latter, as an injection moulding aid.
6. Device according to claim 5, characterised in that the injection moulding aid comprises a conical end area (27) outside of the connector socket.
7. Device according to claim 5 or 6, characterised in that the injection moulding aid comprises a centring point (23) with an adjacent stop face (24), the centring point fitting into the hole (21) in the partial surface (11) of the connector socket.
EP85103143A 1984-03-22 1985-03-19 Socket with an insulation jacket and device for making it Expired - Lifetime EP0158845B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843410461 DE3410461A1 (en) 1984-03-22 1984-03-22 PLUG SOCKET WITH INSULATING SHEATHING AND DEVICE FOR THEIR PRODUCTION
DE3410461 1984-03-22

Publications (4)

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EP0158845A2 EP0158845A2 (en) 1985-10-23
EP0158845A3 EP0158845A3 (en) 1988-10-05
EP0158845B1 EP0158845B1 (en) 1990-02-07
EP0158845B2 true EP0158845B2 (en) 1993-06-23

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EP85103143A Expired - Lifetime EP0158845B2 (en) 1984-03-22 1985-03-19 Socket with an insulation jacket and device for making it

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EP (1) EP0158845B2 (en)
DE (2) DE3410461A1 (en)
IE (1) IE56663B1 (en)

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Also Published As

Publication number Publication date
EP0158845A3 (en) 1988-10-05
DE3410461A1 (en) 1985-09-26
DE3576019D1 (en) 1990-03-15
IE56663B1 (en) 1991-10-23
EP0158845A2 (en) 1985-10-23
EP0158845B1 (en) 1990-02-07
DE3410461C2 (en) 1987-07-30
IE850719L (en) 1985-09-22

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