EP0332034B1 - Bridging means for safety plug with hollow cylindrical pins for the current and earth leads - Google Patents

Bridging means for safety plug with hollow cylindrical pins for the current and earth leads Download PDF

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Publication number
EP0332034B1
EP0332034B1 EP19890103548 EP89103548A EP0332034B1 EP 0332034 B1 EP0332034 B1 EP 0332034B1 EP 19890103548 EP19890103548 EP 19890103548 EP 89103548 A EP89103548 A EP 89103548A EP 0332034 B1 EP0332034 B1 EP 0332034B1
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EP
European Patent Office
Prior art keywords
bridge
plug
pins
terminal pins
conductor
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
EP19890103548
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German (de)
French (fr)
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EP0332034B2 (en
EP0332034A3 (en
EP0332034A2 (en
Inventor
Michael Taller
Thomas Waible
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Taller GmbH
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Taller GmbH
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Priority claimed from DE3807716A external-priority patent/DE3807716C3/en
Application filed by Taller GmbH filed Critical Taller GmbH
Publication of EP0332034A2 publication Critical patent/EP0332034A2/en
Publication of EP0332034A3 publication Critical patent/EP0332034A3/en
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Publication of EP0332034B1 publication Critical patent/EP0332034B1/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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
    • H01R24/30—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable with additional earth or shield contacts
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/504—Bases; Cases composed of different pieces different pieces being moulded, cemented, welded, e.g. ultrasonic, or swaged together
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/655—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth brace
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • the present invention relates to a plug bridge of a safety plug according to the preamble of patent claim 1.
  • Plug bridges of this type are known (DE-U 87 16 567) and on the whole they have also proven themselves. Basically, such protective contact plugs have the task of handling an electrical device, i. H. the connection of this device when plugging the connector into the power outlet does not become a danger that people may be at risk due to a so-called earth fault.
  • the person who puts the plug in the socket can suffer health damage that can even lead to death.
  • the finished earthing contact plugs are individually checked for their electrical safety using so-called contour testing devices.
  • the plug is placed in a test form that corresponds to its shape and electrically charged from the outside.
  • connectors with individual wires that protrude outwards or are too close apart can be eliminated.
  • this is associated with significant production costs, i.e. H. Associated testing costs.
  • Protective contact plugs with two current conductors and a protective conductor are designed so-called protective caps, which are plugged onto the plug bridge before the protective contact plug is overmolded in order to secure the space around the connection points of the current conductors and the protective conductor to the outside.
  • This protective cap is designed in accordance with the contour of the plug bridge; it is plugged over the connector bridge and stands flush against the inner floor surface.
  • the protective cap is non-positively latched onto the connector bridge before it is overmolded with plastic using two locking lugs that project laterally over the connector bridge.
  • This protective cap is a relatively complicated molded part, i. H. the injection mold is expensive.
  • care is taken only afterwards to ensure that conductor ends which have not been properly inserted do not cause any damage.
  • the object on which the present invention is based is to simplify the insertion funnel for the protective conductor and, in a preferred further development, to design it in such a way that it can be used as a rest for the insertion funnel of the current conductor.
  • Insertion funnels to facilitate assembly and manufacturing in the manufacture of two-pin power plugs are also known in principle from FR-A-25 38 625. These insertion funnels are also realized by molded parts protruding from the connector bridge. It is a two-pin power plug.
  • the U-shaped molded part 10 made of hard-elastic plastic.
  • the two legs 11, 12 of the U delimit a free space 13 and are connected to one another via a connecting web 14 (transverse web of the U).
  • the connecting web 14 protrudes laterally on both sides of the U and has an approximately trapezoidal outer contour, the shorter diagonal of which is dimensioned in accordance with the standardized spacing of the contact pins or contact sockets of the mains socket.
  • the plug bridge 1 described so far with regard to the basic mechanical form is electrically equipped as follows: On the outside of the connecting web 14, at the aforementioned standardized distance from one another and with a standardized length, contact pins 15 project outwards (with which the plug is ultimately inserted into a mains socket). The contact pins 15 are firmly seated in corresponding bores of the connecting web 14 and they are (at the second end) extended to the rear so far that they protrude into the interior of the U-shaped molded part 10 in the form of hollow cylindrical connecting pins 16. With these connecting pins 16, the conductor ends of a consumer line (cf. FIGS. 2-17) are ultimately mechanically connected, in particular crimped or crimped.
  • the electrical system is completed by a protective conductor which is connected as part of the consumer line 17 to a third pin 19 on the inside of the connecting web 14.
  • the connection pins 16 of the current conductor and the connection pin 19 of the protective conductor are arranged approximately in a triangle with respect to one another.
  • the pin 19 of the protective conductor is connected to arranged on the outer sides of the legs 11, 12 of the U-shaped molded part 10 contact springs 20 which, when the protective contact plug is plugged into a mains socket, connects the latter to a coupling located in the device to be connected, so that the protective conductor is connected Consumer line 17 and thus the device itself have a ground fault.
  • the plug bridge 1 described so far is state of the art. When encapsulating this plug bridge for the purpose of finishing the protective contact plug, the problems mentioned at the outset can now occur. H. If the individual wires of the current conductor and the protective conductor protrude to the side, it can happen that they extend outwards through the molded plug head.
  • the connector bridge 1 is designed and / or developed as explained and described below.
  • a molded part 21 directed toward this connecting pin 19 is injection-molded as an integral part of the injection mold for the U-shaped 10.
  • This molded part 21 extends beyond the connecting pin 19 and is supported by a support leg 22 on the connecting web 14 (transverse web of the U or floor of the free space).
  • the connecting pin 19 for the protective conductor is thus completely bridged, the part of the molded part 21 protruding from the leg 11 on the free front edge, ie. H. the free end face, if necessary, only needs to be supported on one or both sides.
  • An essential partial feature of the molded part 21 is a conical through hole 23, namely coaxial to the associated pin 19.
  • the smaller diameter of this through hole 23 lies opposite the end face of the pin 19, so that it has a funnel-shaped extension towards the free side of the molded part 21.
  • the stripped cable end of the protective conductor can be inserted easily and safely via this funnel-shaped extension, and without a single wire of the protective conductor being bent.
  • the material thickness of the molded part 21 is selected at least around the through hole 23 such that - depending on the length of the stripping - this single wire is securely behind the upper edge of the through hole 23 disappears.
  • the protective conductor can thus be securely inserted and fixed with the aid of the molded part 21 or the conical through hole 23, for example by squeezing (crimping).
  • an analog molded part 30 is provided as an insertion aid for the current conductors.
  • This further molded part 30 has an approximately bone-shaped basic shape and a length such that it extends over both connecting pins 16 for the current conductors.
  • These two connecting pins 16 are thus connected to one another in a bridge-like manner parallel to the connecting web 14 of the U, this bridge resting at the end on the connecting pins 16, preferably via undercuts 31 which are complementary to the diameter of the connecting pins 16.
  • Coaxial to these undercuts 31 and thus coaxial to the connecting pins 16 (and the Contact pins 15) are each provided with a conical through hole 32.
  • the line ends of the current conductors can also be inserted safely and without problems, as with the protective conductor.
  • the thickness of the molded part 30 is selected at least in the area of the through holes 32 such that bent and thus protruding individual wires safely disappear behind the upper edge of the respective through hole 32.
  • a bracket 33 can optionally be molded onto the connecting web 14 of the U-shaped molded part 10, which is designed such that it carries this molded part 30 placed on the connecting pins 16 from below.
  • the molded part 21 for the protective conductor is formed at the transition between the part projecting beyond the connecting pin 19 and the support leg 22, that a locking lug 40 is formed, on which the bridge-like molded part 30 can snap into place.
  • the support leg 22, the console 33, and the central part of the bridge-like molded part 30 can be designed to be complementary to one another via shoulders and one or the detent 40 on the support foot 22 such that the bridge-like molded part 30 in the central region is clamped positively and non-positively.
  • the molded part 21 for the connecting pin 16 of the protective conductor is only supported laterally via support feet 22 - this corresponds to the drawing - the bridge-like molded part 30 is on the side facing the leg 12 in the center of the console 33 and on the other side via a spaced apart Stand on pair of support lugs 22.
  • the bridge-like molded part 30 engages under the other molded part 21, which is molded onto the plug bridge.
  • a corresponding bevel 34 is provided on the bracket 33 (see section A - B).
  • the plug bridge 1 with the molded part 21 for the connecting pin 16 of the protective conductor and with the molded part 30 for the connecting pins 16 of the current conductor forms a form-fitting and non-positively joined assembly unit. This is - after the stripped conductor ends of the current conductor and the protective conductor are inserted into the hollow cylindrical connecting pins - overmoulded with soft elastic plastic, so that a finished protective contact plug can ultimately be removed from the injection mold. This consists - as shown in Fig. 2 - of a plug head, behind which the elements mentioned are hidden and which can be plugged into a mains socket via the contact pins 15. The device connected to the consumer line 17 is thus connected to the general power network.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Electric Cable Installation (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

Die vorliegende Erfindung bezieht sich auf eine Steckerbrücke eines Schutzkontaktsteckers nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a plug bridge of a safety plug according to the preamble of patent claim 1.

Steckerbrücken dieser Art sind bekannt (DE-U 87 16 567) und sie haben sich im großen und ganzen auch bewährt. Grundsätzlich haben derartige Schutzkontaktstecker die Aufgabe, die Handhabung eines elektrischen Gerätes, d. h. das Anschließen dieses Geräts beim Einstecken des Anschlußsteckers in die Netzsteckdose nicht zu einer Gefahr dahingehend werden zu lassen, daß etwa auf Grund eines sogenannten Erdschlusses Personen gefährdet werden.Plug bridges of this type are known (DE-U 87 16 567) and on the whole they have also proven themselves. Basically, such protective contact plugs have the task of handling an electrical device, i. H. the connection of this device when plugging the connector into the power outlet does not become a danger that people may be at risk due to a so-called earth fault.

Die Herstellung und Konzeption der Schutzkontaktstecker unterliegen strengen Auflagen und Vorschriften. Bei der modernen, insbesondere automatisierten Massenherstellung ist besonderes Augenmerk darauf zu richten, daß die Leiteranschlüsse, d. h. die Stromleiter und der Schutzleiter, die mit der Steckerbrücke verbunden sind und die elektrische Verbindung zwischen dem Elektrizitätswerk einerseits und dem Gerät andererseits herstellen, einen hinreichenden Sicherheitsabstand zur Außenseite des Schutzkontaktsteckers haben. Schließlich besteht die Gefahr, daß sich einzelne Drähte der Leiter während der Herstellung beim Einführen in die Bohrungen der hohlzylindrischen Anschlußstifte verbiegen und verkanten, so daß sie von der fertigen Steckerbrücke nach außen abstehen. Wird dies nicht bemerkt, so kann es vorkommen, daß beim abschließenden Umspritzen der Steckerbrükke die abstehenden Einzeldrähte durch die Oberfläche des Schutzkontaktsteckers hindurchragen oder so nahe zur Außenseite hin liegen, daß bei der Handhabung ein Erdschluß entsteht.The manufacture and design of the safety plug are subject to strict requirements and regulations. In modern, especially automated mass production, special attention should be paid to the fact that the conductor connections, i. H. the current conductors and the protective conductor, which are connected to the plug bridge and establish the electrical connection between the power plant on the one hand and the device on the other hand, have a sufficient safety distance from the outside of the protective contact plug. Finally, there is a risk that individual wires of the conductor bend and tilt during manufacture when inserted into the holes in the hollow cylindrical connecting pins, so that they protrude outwards from the finished connector bridge. If this is not noticed, it can happen that during the final injection molding around the plug bridge, the protruding individual wires protrude through the surface of the safety plug or are so close to the outside that an earth fault occurs during handling.

Die Person, die den Stecker in die Steckdose steckt, kann dadurch einen gesundheitlichen Schaden erleiden, der sogar zum Tod führen kann.The person who puts the plug in the socket can suffer health damage that can even lead to death.

Aus diesem Grunde werden die fertigen Schutzkontaktstecker jeweils einzeln mittels sogenannter Konturenprüfeinrichtungen auf ihre elektrische Sicherheit geprüft. Der Stekker wird dazu in eine seiner Form entsprechende Prüfform eingelegt und von außen elektrisch beaufschlagt. Auf diese Weise können Stecker mit nach außen durchstehenden bzw. einen zu geringen Abstand aufweisenden Einzeldrähten eliminiert werden. Dies ist jedoch mit erheblichen Produktionskosten, d. h. Prüfkosten verbunden.For this reason, the finished earthing contact plugs are individually checked for their electrical safety using so-called contour testing devices. For this purpose, the plug is placed in a test form that corresponds to its shape and electrically charged from the outside. In this way, connectors with individual wires that protrude outwards or are too close apart can be eliminated. However, this is associated with significant production costs, i.e. H. Associated testing costs.

Um die genannten Gefahren von vornherein zu reduzieren, wurden in Verbindung mit der Herstellung normaler Schutzkontaktstecker, d. h. Schutzkontaktstecker mit zwei Stromleitern und einem Schutzleiter sogenannte Schutzkappen konzipiert, die vor dem Umspritzen des Schutzkontaktstek kers auf die Steckerbrücke gesteckt werden, um den Raum um die Verbindungsstellen der Stromleiter und des Schutzleiters nach außen abzusichern. Diese Schutzkappe ist der Kontur der Steckerbrükke entsprechend ausgebildet; sie wird über die Steckerbrücke gesteckt und steht bündig an der inneren Bodenfläche auf. Über zwei seitlich über die Steckerbrücke überkragende Rastnasen wird die Schutzkappe vor dem Umspritzen mit Kunststoff kraftschlüssig an der Steckerbrücke eingeklinkt.In order to reduce the dangers mentioned from the outset, in connection with the manufacture of normal earthing contact plugs, i. H. Protective contact plugs with two current conductors and a protective conductor are designed so-called protective caps, which are plugged onto the plug bridge before the protective contact plug is overmolded in order to secure the space around the connection points of the current conductors and the protective conductor to the outside. This protective cap is designed in accordance with the contour of the plug bridge; it is plugged over the connector bridge and stands flush against the inner floor surface. The protective cap is non-positively latched onto the connector bridge before it is overmolded with plastic using two locking lugs that project laterally over the connector bridge.

Bei dieser Schutzkappe handelt es sich um ein relativ kompliziertes Formteil, d. h. die Spritzform ist teuer. Hinzu kommt, daß mit den bekannten Schutzkappen quasi nur nachträglich Sorge dafür getragen ist, daß nicht einwandfrei eingeführte Leiterenden keinen Schaden verursachen.This protective cap is a relatively complicated molded part, i. H. the injection mold is expensive. In addition, with the known protective caps, care is taken only afterwards to ensure that conductor ends which have not been properly inserted do not cause any damage.

Gemäß dem auf Grund des Gesamtoffenbarungsgehalts als gattungsbildend betrachteten DE-U 87 16 567 ist bereits vorgesehen, einem oder auch mehreren Steckerstiften einer Steckerbrücke einen mit einem umgreifenden Kragen versehenen, als separates Bauteil ausgebildeten Einführungstrichter aufzusetzen; zur Verwendung für mehrere Steckerstifte können die entsprechenden Einführungstrichter auch untereinander verbunden sein.According to DE-U 87 16 567, which is considered to be generic based on the total disclosure content, provision is already made for one or more connector pins of a connector bridge to be fitted with an insertion funnel provided with a surrounding collar and designed as a separate component; the corresponding insertion funnels can also be connected to one another for use with a plurality of plug pins.

Die der vorliegenden Erfindung zugrundeliegende Aufgabe besteht darin, den Einführtrichter für den Schutzleiter einfacher zu gestalten und ihn darüberhinaus in bevorzugter Weiterbildung so zu konzipieren, daß er als Rast für die Einführtrichter der Stromleiter benutzt werden kann.The object on which the present invention is based is to simplify the insertion funnel for the protective conductor and, in a preferred further development, to design it in such a way that it can be used as a rest for the insertion funnel of the current conductor.

Die vorgenannte Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs 1 spezifizierten Merkmale gelöst.The above object is achieved by the features specified in the characterizing part of patent claim 1.

Dabei soll ergänzend angemerkt werden, daß vorhandene Einrichtungen, Maschinen und Werkzeuge durch Modifikationen der erfindungsgemäßen Art nur so wenig wie irgend möglich beeinflußt werden sollen.It should also be noted that existing devices, machines and tools should be influenced as little as possible by modifications of the type according to the invention.

Ein ganz wesentlicher Vorteil der erfindungsgemäßen Konzeption ist darin zu sehen, daß auf Grund der erfindungsgemäßen Konzeption der Einführtrichter die Montagezeiten, d.h. die Produktionszyklen für Steckerbrücken der genannten Art erheblich reduziert werden konnten. Der wirtschaftliche Erfolg der vorliegenden Erfindung soll somit bereits jetzt ganz besonders hervorgehoben werden.A very significant advantage of the concept according to the invention can be seen in the fact that, due to the concept of the introduction funnel according to the invention, the assembly times, i.e. the production cycles for plug bridges of the type mentioned could be significantly reduced. The economic success of the present invention should therefore already be particularly emphasized.

Einführtrichter zur Montage- bzw. Fertigungserleichterung bei der Herstellung von zweipoligen Netzsteckern sind im Prinzip auch bereits aus der FR-A-25 38 625 bekannt. Auch diese Einführtrichter sind durch von der Steckerbrücke abstehende Formteile realisiert. Es handelt sich hierbei um einen zweipoligen Netzstecker.Insertion funnels to facilitate assembly and manufacturing in the manufacture of two-pin power plugs are also known in principle from FR-A-25 38 625. These insertion funnels are also realized by molded parts protruding from the connector bridge. It is a two-pin power plug.

Weiterbildungen im Hinblick auf die Realisierung der Einführtrichter für die Anschlußstifte der Stromleiter einerseits, und des Einführtrichters für den Schutzleiter andererseits, sowie für eine kombinatorische Lösung für sämtliche Leiter sind Gegenstand der Unteransprüche.Developments with regard to the implementation of the insertion funnel for the connecting pins of the current conductors on the one hand, and the insertion funnel for the protective conductor, on the other hand, and for a combinatorial solution for all conductors are the subject of the subclaims.

Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Diese zeigt in

  • Fig. 1 im Rahmen einer Konstruktionszeichnung in drei, zum Teil geschnittenen Ansichten die Einzelheiten einer kompletten Steckerbrücke;
  • Fig. 2 einen kompletten, fertig gespritzten Schutzkontaktstecker.
The invention is explained in more detail below with reference to the drawing. This shows in
  • Figure 1 in the context of a construction drawing in three, partially sectioned views, the details of a complete connector bridge.
  • Fig. 2 shows a complete, molded injection plug.

Die Steckerbrücke 1 nach Fig. 1 besteht im wesentlichen aus einem U-förmigen Formteil 10 aus hartelastischem Kunststoff. Die beiden Schenkel 11, 12 des U begrenzen einen Freiraum 13 und sind über einen Verbindungssteg 14 (Quersteg des U ) miteinander verbunden.1 essentially consists of a U-shaped molded part 10 made of hard-elastic plastic. The two legs 11, 12 of the U delimit a free space 13 and are connected to one another via a connecting web 14 (transverse web of the U).

Der Verbindungssteg 14 kragt zu beiden Seiten des U seitlich aus und hat eine etwa trapezförmige Außenkontur, deren kürzere Diagonale dem genormten Abstand der Kontaktstifte bzw. Kontaktbuchsen der Netzsteckdose entsprechend dimensioniert ist.The connecting web 14 protrudes laterally on both sides of the U and has an approximately trapezoidal outer contour, the shorter diagonal of which is dimensioned in accordance with the standardized spacing of the contact pins or contact sockets of the mains socket.

Die soweit bezüglich der mechanischen Grundform beschriebene Steckerbrücke 1 ist elektrisch wie folgt bestückt: An der Außenseite des Verbindungsstegs 14 ragen im erwähnten genormten Abstand zueinander und mit genormter Länge Kontaktstifte 15 nach außen (mit denen der Stecker letztlich in eine Netzsteckdose eingeführt wird). Die Kontaktstifte 15 sitzen fest in entsprechenden Bohrungen des Verbindungsstegs 14 und sie sind (am zweiten Ende) rückseitig so weit verlängert, daß sie in Form von hohlzylindrischen Anschlußstiften 16 ins Innere des U-förmigen Formteils 10 ragen. Mit diesen Anschlußstiften 16 werden letztlich die Leiterenden einer Verbraucherleitung (vlg. Fig. 2 - 17) mechanisch verbunden, insbesondere angecrimpt oder angequetscht.The plug bridge 1 described so far with regard to the basic mechanical form is electrically equipped as follows: On the outside of the connecting web 14, at the aforementioned standardized distance from one another and with a standardized length, contact pins 15 project outwards (with which the plug is ultimately inserted into a mains socket). The contact pins 15 are firmly seated in corresponding bores of the connecting web 14 and they are (at the second end) extended to the rear so far that they protrude into the interior of the U-shaped molded part 10 in the form of hollow cylindrical connecting pins 16. With these connecting pins 16, the conductor ends of a consumer line (cf. FIGS. 2-17) are ultimately mechanically connected, in particular crimped or crimped.

Das elektrische System wird durch einen Schutzleiter vervollständigt, der als Teil der Verbraucherleitung 17 mit einem dritten Anschlußstift 19 an der Innenseite des Verbindungsstegs 14 verbunden ist. Die Anschlußstifte 16 der Stromleiter und der Anschlußstift 19 des Schutzleiters sind etwa im Dreieck zueinander angeordnet. Der Anschlußstift 19 des Schutzleiters ist mit an den Außenseiten der Schenkel 11, 12 des U-förmigen Formteils 10 angeordneten Kontaktfedern 20 verbunden, die beim Einstecken des Schutzkontaktsteckers in eine Netzsteckdose diese mit einer sich im anzuschließenden Gerät befindlichen Kupplung verbindet, so daß der Schutzleiter der Verbraucherleitung 17 und damit das Gerät selbst Erdschluß haben.The electrical system is completed by a protective conductor which is connected as part of the consumer line 17 to a third pin 19 on the inside of the connecting web 14. The connection pins 16 of the current conductor and the connection pin 19 of the protective conductor are arranged approximately in a triangle with respect to one another. The pin 19 of the protective conductor is connected to arranged on the outer sides of the legs 11, 12 of the U-shaped molded part 10 contact springs 20 which, when the protective contact plug is plugged into a mains socket, connects the latter to a coupling located in the device to be connected, so that the protective conductor is connected Consumer line 17 and thus the device itself have a ground fault.

Die soweit beschriebene Steckerbrücke 1 ist Stand der Technik. Beim Umspritzen dieser Stekkerbrücke zwecks Endfertigung des Schutzkontaktsteckers können nun die eingangs genannten Probleme auftreten, d. h. bei seitlich abstehenden Einzeldrähtchen der Stromleiter und des Schutzleiters kann es vorkommen, daß diese bis nach außen durch den gespritzten Steckerkopf reichen.The plug bridge 1 described so far is state of the art. When encapsulating this plug bridge for the purpose of finishing the protective contact plug, the problems mentioned at the outset can now occur. H. If the individual wires of the current conductor and the protective conductor protrude to the side, it can happen that they extend outwards through the molded plug head.

Um dieses Risiko gänzlich auszuschalten wird die Steckerbrücke 1 wie nachstehend erläutert und beschrieben aus-und/oder weitergebildet.In order to completely eliminate this risk, the connector bridge 1 is designed and / or developed as explained and described below.

An dem dem Anschlußstift 19 für den Schutzleiter benachbarten Schenkel 11 des U ist - als integrierter Bestandteil der Spritzform für das U-förmige 10 - ein zu diesem Anschlußstift 19 hin gerichtetes Formteil 21 angespritzt. Dieses Formteil 21 reicht über den Anschlußstift 19 hinaus und ist über einen Stützfuß 22 am Verbindungssteg 14 (Quersteg des U bzw. Boden des Freiraums) abgestützt. Der Anschlußstift 19 für den Schutzleiter ist somit vollständig überbrückt, wobei der vom Schenkel 11 abstehende Teil des Formteils 21 an der freien Vorderkante, d. h. der freien Stirnseite, ggf. auch nur an einer oder an beiden Seiten abgestützt zu sein braucht.On the leg 11 of the U adjacent to the connecting pin 19 for the protective conductor, a molded part 21 directed toward this connecting pin 19 is injection-molded as an integral part of the injection mold for the U-shaped 10. This molded part 21 extends beyond the connecting pin 19 and is supported by a support leg 22 on the connecting web 14 (transverse web of the U or floor of the free space). The connecting pin 19 for the protective conductor is thus completely bridged, the part of the molded part 21 protruding from the leg 11 on the free front edge, ie. H. the free end face, if necessary, only needs to be supported on one or both sides.

Ein wesentliches Teilmerkmal des Formteils 21 ist ein konisches Durchgangsloch 23 und zwar koaxial zum zugehörigen Anschlußstift 19. Der kleinere Durchmesser dieses Durchgangslochs 23 liegt der Stirnseite des Anschlußstiftes 19 gegenüber, so daß dieser zur freien Seite des Formteils 21 hin eine trichterförmige Erweiterung aufweist. Über diese trichterförmige Erweiterung läßt sich das abisolierte Leitungsende des Schutzleiters leicht und sicher, und ohne daß ein Einzeldrähtchen des Schutzleiters umgeknickt wird, einführen.An essential partial feature of the molded part 21 is a conical through hole 23, namely coaxial to the associated pin 19. The smaller diameter of this through hole 23 lies opposite the end face of the pin 19, so that it has a funnel-shaped extension towards the free side of the molded part 21. The stripped cable end of the protective conductor can be inserted easily and safely via this funnel-shaped extension, and without a single wire of the protective conductor being bent.

Für den Fall, daß wider Erwarten doch einmal ein Einzeldrähtchen des Schutzleiters abknicken und abstehen sollte, ist die Materialstärke des Formteils 21 mindestens um Das Durchgangsloch 23 herum so gewählt, daß - der Länge der Abisolierung entsprechend - dieses Einzeldrähtchen sicher hinter der Oberkante des Durchgangslochs 23 verschwindet.In the event that, contrary to expectations, a single wire of the protective conductor should bend and protrude, the material thickness of the molded part 21 is selected at least around the through hole 23 such that - depending on the length of the stripping - this single wire is securely behind the upper edge of the through hole 23 disappears.

Der Schutzleiter läßt sich somit sicher mit Hilfe des Formteils 21 bzw. des konischen Durchgangslochs 23 einführen und fixieren, beispielsweise durch Quetschen (Crimpen).The protective conductor can thus be securely inserted and fixed with the aid of the molded part 21 or the conical through hole 23, for example by squeezing (crimping).

Für die Stromleiter ist in Weiterbildung ein analoges Formteil 30 als Einführhilfe vorgesehen. Dieses weitere Formteil 30 hat eine etwa knochenförmige Grundform und eine solche Länge, daß es über beide Anschlußstifte 16 für die Stromleiter reicht. Diese beiden Anschlußstifte 16 sind somit parallel zum Verbindungssteg 14 des U brückenartig miteinander verbunden, wobei diese Brücke endseitig auf den Anschlußstiften 16 ruht, und zwar vorzugsweise über zum Durchmesser der Anschlußstifte 16 komplementäre Hinterschneidungen 31. Koaxial zu diesen Hinterschneidungen 31 und damit koaxial zu den Anschlußststiften 16 (und den Kontaktstiften 15) ist wiederum jeweils ein konisches Durchgangsloch 32 vorgesehen. Ist das brückenartige Formteil 30 letztlich auf die Anschlußstifte 16 der Stromleiter aufgesetzt, so können - wie beim Schutzleiter - auch die Leitungsenden der Stromleiter sicher und problemlos eingeführt werden. Die Dicke des Formteils 30 ist hierbei zumindest im Bereich der Durchgangslöcher 32 so gewählt, daß etwa doch umgebogene und damit abstehende Einzeldrähtchen sicher hinter der Oberkante des jeweiligen Durchgangslochs 32 verschwinden.In a further development, an analog molded part 30 is provided as an insertion aid for the current conductors. This further molded part 30 has an approximately bone-shaped basic shape and a length such that it extends over both connecting pins 16 for the current conductors. These two connecting pins 16 are thus connected to one another in a bridge-like manner parallel to the connecting web 14 of the U, this bridge resting at the end on the connecting pins 16, preferably via undercuts 31 which are complementary to the diameter of the connecting pins 16. Coaxial to these undercuts 31 and thus coaxial to the connecting pins 16 (and the Contact pins 15) are each provided with a conical through hole 32. If the bridge-like molded part 30 is ultimately placed on the connecting pins 16 of the current conductors, the line ends of the current conductors can also be inserted safely and without problems, as with the protective conductor. The thickness of the molded part 30 is selected at least in the area of the through holes 32 such that bent and thus protruding individual wires safely disappear behind the upper edge of the respective through hole 32.

Zur Stabilisierung des Formteils 30 für die Anschlußstifte 16 der Stromleiter kann ggf. am Verbindungssteg 14 des U-förmigen Formteils 10 eine Konsole 33 angespritzt sein, die so ausgebildet ist, daß sie dieses auf die Anschlußstifte 16 aufgesetzte Formteil 30 von unten her trägt.To stabilize the molded part 30 for the connecting pins 16 of the current conductors, a bracket 33 can optionally be molded onto the connecting web 14 of the U-shaped molded part 10, which is designed such that it carries this molded part 30 placed on the connecting pins 16 from below.

In besonderer und bevorzugter Weiterbildung und Ausgestaltung der vorbeschriebenen beiden Typen von Formteilen 21 bzw. 30 für die Anschlußstifte der Stromleiter und des Schutzleiters ist vorgesehen, das Formteil 21 für den Schutzleiter am Übergang zwischen dem den Anschlußstift 19 überkragenden Teil und dem Stützfuß 22 so auszubilden, daß eine Rastnase 40 entsteht, an der das brückenartige Formteil 30 einrasten kann.In a special and preferred development and configuration of the two types of molded parts 21 and 30 for the connecting pins of the current conductors and the protective conductor described above, it is provided that the molded part 21 for the protective conductor is formed at the transition between the part projecting beyond the connecting pin 19 and the support leg 22, that a locking lug 40 is formed, on which the bridge-like molded part 30 can snap into place.

Diese Konzeption läßt sich weiter dahingehend optimieren, daß der Stützfuß 22, die Konsole 33, und der Mittelteil des brückenartigen Formteil 30 über Schultern und eine bzw. die Rastnase 40 am Stützfuß 22 derart komplementär zueinander ausgebildet werden können, daß das brückenartige Formteil 30 im Mittenbereich form-und kraftschlüssig eingespannt ist. (Hierzu wird explizit auf die zeichnerische Darstellung im Schnitt A - B verwiesen). Ist das Formteil 21 für den Anschlußstift 16 des Schutzleiters nur seitlich über Stützfüße 22 abgestützt - dies entspricht der zeichnerischen Darstellung - so ist das brückenartige Formteil 30 auf der dem Schenkel 12 zugewandten Seite mittig von der Konsole 33 und auf der anderen Seite über ein voneinander beabstandetes Paar von Stütznasen 22 aufgeständert. Innerhalb dieses Breitenbereichs rastet das brückenartige Formteil 30 unter dem anderen - an die Steckerbrükke angespritzten Formteil 21 ein. Zum besseren Einfügen bzw. Einführen des brückenartigen Formteils 30 ist an der Konsole 33 eine entsprechende Schräge 34 vorgesehen (vgl. Schnitt A - B).This concept can be further optimized in such a way that the support leg 22, the console 33, and the central part of the bridge-like molded part 30 can be designed to be complementary to one another via shoulders and one or the detent 40 on the support foot 22 such that the bridge-like molded part 30 in the central region is clamped positively and non-positively. (Please refer explicitly to the graphic representation in section A - B). If the molded part 21 for the connecting pin 16 of the protective conductor is only supported laterally via support feet 22 - this corresponds to the drawing - the bridge-like molded part 30 is on the side facing the leg 12 in the center of the console 33 and on the other side via a spaced apart Stand on pair of support lugs 22. Within this width range, the bridge-like molded part 30 engages under the other molded part 21, which is molded onto the plug bridge. For a better insertion or insertion of the bridge-like molded part 30, a corresponding bevel 34 is provided on the bracket 33 (see section A - B).

Anhand von Fig. 2 soll das Endprodukt "Schutzkontaktstecker" gezeigt werden. (Bezugszeichen 3).2, the end product "protective contact plug" is to be shown. (Reference number 3).

Die Steckerbrücke 1 mit dem Formteil 21 für den Anschlußstift 16 des Schutzleiters und mit dem Formteil 30 für die Anschlußstifte 16 der Stromleiter bildet eine form- und kraftschlüssig zusammen gefügte Montageeinheit. Diese wird - nachdem die abisolierten Leiterenden der Stromleiter und des Schutzleiters in die hohlzylindrischen Anschlußstifte eingeführt sind - mit weichelastischem Kunststoff umspritzt, so daß letztendlich ein fertiger Schutzkontaktstecker der Spritzform entnommen werden kann. Dieser besteht - wie in Fig. 2 dargestellt - aus einem Steckerkopf, hinter dem sich die genannten Elemente verbergen und der über die Kontaktstifte 15 in eine Netzsteckdose gesteckt werden kann. Damit ist das mit der Verbraucherleitung 17 verbundene Gerät mit dem allgemeinen Stromnetz verbunden.The plug bridge 1 with the molded part 21 for the connecting pin 16 of the protective conductor and with the molded part 30 for the connecting pins 16 of the current conductor forms a form-fitting and non-positively joined assembly unit. This is - after the stripped conductor ends of the current conductor and the protective conductor are inserted into the hollow cylindrical connecting pins - overmoulded with soft elastic plastic, so that a finished protective contact plug can ultimately be removed from the injection mold. This consists - as shown in Fig. 2 - of a plug head, behind which the elements mentioned are hidden and which can be plugged into a mains socket via the contact pins 15. The device connected to the consumer line 17 is thus connected to the general power network.

Claims (4)

1. A plug bridge (1) for a safety plug (3) for electrical devices which can be plugged into a mains socket, having a substantially U-shaped basic form (10) for receiving and fixing hollow cylindrical terminal pins (16 or 19) for the current conductors and the earthing conductor of a cable (17) in the open region of the U (free space 13) and for receiving, at the base of the U, the contact pins (15) which are galvanically connected to the terminal pin (16) of the current conductors, wherein the conductor ends of the cable (17) can be inserted - with ends stripped - into the terminal pins (16 or 19) and can be connected thereto, wherein the plug bridge (1) can be sprayed with synthetic material in a spray mould together with the end piece of the cable (17), and wherein an inlet funnel with a conical through hole is arranged in front of at least one of the terminal pins (16 or 19), the height of the said inlet funnel being selected such that when the stripped conductor ends are inserted, any deflected individual wires lie securely within the corresponding through hole (23 or 32), characterised in that the inlet funnel for the terminal pin (19) of the earthing conductor is formed as an integral component of the plug bridge (1) insofar as it is formed by a shaped part (21) which is fixedly attached to the arm (11) of the U adjacent to the said terminal pin (19) and which has the conical through hole (23) axially to the terminal pin (19).
2. A plug bridge according to claim 1, characterised in that the shaped part (21) has, on the free side projecting over the terminal pin (19), at least one supporting foot (22) positioned on the joining piece (14) of the U.
3. A plug bridge according to claim 2, characterised in that the inlet funnel for the terminal pins (16) of the current conductors is formed as a separate bridge part (30) projecting over both terminal pins (16) and having at each end a conical through hole (32) lying coaxially with the terminal pins (16), and in that the supporting foot (22) and the bridge part (30) are formed in a manner complementary to each other such that the bridge part (30) can be engaged on the shaped part (21).
4. A plug bridge according to claim 3, characterised in that a bracket (33) is provided on the joining piece (14) of the in between the terminal pins (16) for the current conductors next to the supporting foot (22), and in that supporting foot (22), bracket (33) and bridge part (30) are adapted to each other and formed in a manner complementary to each other such that the bridge part (30) can be engaged in a positive and non-positive manner.
EP19890103548 1988-03-09 1989-03-01 Bridging means for safety plug with hollow cylindrical pins for the current and earth leads Expired - Lifetime EP0332034B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807716A DE3807716C3 (en) 1988-03-09 1988-03-09 Plug bridge for a protective contact plug with hollow cylindrical connection pins for the current conductor and the protective conductor
DE3807716 1988-03-09

Publications (4)

Publication Number Publication Date
EP0332034A2 EP0332034A2 (en) 1989-09-13
EP0332034A3 EP0332034A3 (en) 1991-08-21
EP0332034B1 true EP0332034B1 (en) 1993-06-02
EP0332034B2 EP0332034B2 (en) 1998-09-09

Family

ID=6349243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890103548 Expired - Lifetime EP0332034B2 (en) 1988-03-09 1989-03-01 Bridging means for safety plug with hollow cylindrical pins for the current and earth leads

Country Status (3)

Country Link
EP (1) EP0332034B2 (en)
DE (4) DE8817241U1 (en)
ES (1) ES2041356T5 (en)

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EP1575129A1 (en) * 2004-03-09 2005-09-14 AKE-ATALAY Kalip Elektrik Sanayi ve Ticaret Ltd. Protective earthing conductor safety means for electrical appliance plug
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Also Published As

Publication number Publication date
ES2041356T5 (en) 1999-01-16
DE3915852A1 (en) 1990-11-22
DE3911316A1 (en) 1990-10-11
EP0332034B2 (en) 1998-09-09
DE3911316C2 (en) 2003-05-28
DE3915852C2 (en) 1996-09-19
ES2041356T3 (en) 1993-11-16
DE3911315C2 (en) 1996-02-29
DE8817241U1 (en) 1995-05-11
DE3911315A1 (en) 1990-10-11
EP0332034A3 (en) 1991-08-21
EP0332034A2 (en) 1989-09-13

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