EP0391298B1 - Connector with protective contact and with a lead-in help coordinated to the connection socket of the protective contact - Google Patents

Connector with protective contact and with a lead-in help coordinated to the connection socket of the protective contact Download PDF

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Publication number
EP0391298B1
EP0391298B1 EP90106261A EP90106261A EP0391298B1 EP 0391298 B1 EP0391298 B1 EP 0391298B1 EP 90106261 A EP90106261 A EP 90106261A EP 90106261 A EP90106261 A EP 90106261A EP 0391298 B1 EP0391298 B1 EP 0391298B1
Authority
EP
European Patent Office
Prior art keywords
plug
terminal pin
protective contact
protective conductor
baseplate
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
EP90106261A
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German (de)
French (fr)
Other versions
EP0391298A3 (en
EP0391298A2 (en
Inventor
Michael Taller
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.)
Taller GmbH
Original Assignee
Taller GmbH
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Filing date
Publication date
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Priority claimed from DE19893911315 external-priority patent/DE3911315C2/en
Application filed by Taller GmbH filed Critical Taller GmbH
Publication of EP0391298A2 publication Critical patent/EP0391298A2/en
Publication of EP0391298A3 publication Critical patent/EP0391298A3/en
Application granted granted Critical
Publication of EP0391298B1 publication Critical patent/EP0391298B1/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
    • 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
    • H01R13/648—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
    • H01R2103/00—Two poles

Definitions

  • the present invention relates to a safety plug according to the preamble of the claim.
  • a protective contact plug of this type is the subject of the earlier patent application 89 10 35 48.7 (EP 0 332 034).
  • this insertion aid consists of the principle solution of a separate molded part that rests on the connection socket for the protective conductor;
  • the concrete solution disclosed in the earlier patent application EP 0 332 034 consists in that the insertion funnel is formed directly on the corresponding web of the plug bridge, and is thus opposite the connection socket for the protective conductor.
  • the present invention is intended to show another way of realizing the insertion funnel for the protective conductor.
  • This insertion funnel according to the invention is characterized in that it is formed on an L-shaped molded part projecting from the flat base plate of the plug bridge and projecting beyond the connecting socket, consisting of a support foot and a roof, i.e. is integrated there. Furthermore, the support foot is arranged parallel to the legs of the U-shaped molded part in the central region of the base plate and the roof is oriented towards the adjacent leg.
  • This solution has manufacturing advantages in that the cooling times for the connector bridge and thus the risk of this connector bridge being warped due to material shrinkage are reduced.
  • This shows - Two views of a protective contact plug in a sectional view with an L-shaped molded part protruding from the base plate of the plug bridge.
  • 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 (base plate of the plug bridge 1).
  • the plug bridge 1 described so far with regard to the basic mechanical form is electrically equipped as follows: on the outside of the base plate 14, at a 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 seated in corresponding holes in the base plate 14 and they are (at the second end) on the back extended so far that they protrude in the form of hollow cylindrical connecting pins 16 into the free space 13 of the U-shaped molded part 10.
  • the current conductors of a consumer line are mechanically connected, in particular crimped or crimped, with these connecting pins 16.
  • the electrical system is completed by a protective conductor, which is connected to a connecting socket 19 as part of the consumer line.
  • the connecting socket 19 of the protective conductor is part of an earth spring 20 lying on the outer sides of the legs 11, 12 of the U-shaped molded part 10, which connects the protective contact plug into a mains socket when it is connected to a coupling located in the device to be connected, so that the protective conductor of the Consumer line and thus the device itself have a ground fault.
  • the plug bridge 1 described so far is state of the art.
  • problems can now arise in that individual wires of the current conductor and the protective conductor protruding to the side can reach outwards through the molded plug head and thus form a source of danger.
  • the plug bridge 1 with the earthing spring 20 of the older patent application EP 0 332 034 is designed in such a way that the connecting pins 16 and the connecting socket 19 have a conical insertion aid for the conductor ends of the current conductor and the protective conductor is provided. According to the present training, this insertion aid for the protective conductor is verified as follows:
  • the support leg 22 At the free end of the L-leg forming the support leg 22 is bent at right angles so that there is a canopy 23 facing the adjacent leg 11 for the connection socket 19 of the protective conductor. This canopy 23 is ultimately formed by the short leg of the L-shaped molded part 21.
  • An essential partial feature of the L-shaped molded part 21 is a conical through bore 24 lying coaxially with the associated connecting socket 19, the smaller diameter of which lies opposite the end face of the connecting socket 19. This results in a funnel-shaped extension toward the free side of the L-shaped molded part 21, via which the stripped line end of the protective conductor can be easily and securely inserted into the connecting socket 19.
  • the material thickness of the L-shaped molded part 21 in the area of the through hole 24 is selected so that - according to the length of the Abiosltechnik - this single wire safely behind the upper edge of the Through hole 24 disappears.
  • the protective conductor can thus be securely inserted and fixed using the L-shaped molded part 21 or the conical through-hole 24, for example by squeezing or crimping.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Description

Die vorliegende Erfindung bezieht sich auf einen Schutzkontaktstecker nach dem Oberbegriff des Patentanspruchs. Ein Schutzkontaktstecker dieser Art ist Gegenstand der älteren Patentanmeldung 89 10 35 48.7 (EP 0 332 034).The present invention relates to a safety plug according to the preamble of the claim. A protective contact plug of this type is the subject of the earlier patent application 89 10 35 48.7 (EP 0 332 034).

Auch wenn sich dieser Stecker bereits außerordentlich gut bewährt und weitgehend durchgesetzt hat, so hat es sich doch gezeigt, daß noch Verbesserungen möglich sind, und zwar im Hinblick auf die sogenannte Einführhilfe für den Schutzleiteranschluß der Verbraucherleitung. Bei der konstruktiven Lösung nach der älteren Patentanmeldung EP 0 332 034 besteht diese Einführhilfe von der Prinziplösung her aus einem separatem Formteil, das auf der Anschlußbuchse für den Schutzleiter aufliegt; die in der älteren Patentanmeldung EP 0 332 034 offenbarte konkrete Lösung besteht darin, daß der Einführtrichter direkt am entsprechenden Steg der Steckerbrücke angeformt ist, und so der Anschlußbuchse für den Schutzleiter gegenüber liegt.Even if this plug has already proven itself extremely well and has largely been implemented, it has nevertheless been shown that improvements are still possible, with regard to the so-called insertion aid for the protective conductor connection of the consumer line. In the constructive solution according to the older patent application EP 0 332 034, this insertion aid consists of the principle solution of a separate molded part that rests on the connection socket for the protective conductor; The concrete solution disclosed in the earlier patent application EP 0 332 034 consists in that the insertion funnel is formed directly on the corresponding web of the plug bridge, and is thus opposite the connection socket for the protective conductor.

Mit der vorliegenden Erfindung soll ein weiterer Weg zur Realisierung des Einführtrichters für den Schutzleiter aufgezeigt werden.The present invention is intended to show another way of realizing the insertion funnel for the protective conductor.

Dieser erfindungsgemäße Einführtrichter ist dadurch charakterisiert, daß er an einem von der ebenen Grundplatte der Steckerbrücke abstehenden, die Anschlußbuchse überkragenden L-förmigen Formteil, bestehend aus einem Stützfuß und einer Überdachung, ausgebildet ist, d.h. dort integriert ist. Ferner ist der Stützfuß parallel stehend zu den Schenkeln des U-förmigen Formteils im mittleren Bereich der Grundplatte angeordnet und die Überdachung ist zum benachbarten Schenkel hin ausgerichtet.This insertion funnel according to the invention is characterized in that it is formed on an L-shaped molded part projecting from the flat base plate of the plug bridge and projecting beyond the connecting socket, consisting of a support foot and a roof, i.e. is integrated there. Furthermore, the support foot is arranged parallel to the legs of the U-shaped molded part in the central region of the base plate and the roof is oriented towards the adjacent leg.

Diese Lösung hat insofern fertigungstechnische Vorzüge, als die Abkühlzeiten für die Steckerbrücke und damit die Gefahr des Verzugs dieser Steckerbrücke aufgrund Materialschwunds vermindert sind.This solution has manufacturing advantages in that the cooling times for the connector bridge and thus the risk of this connector bridge being warped due to material shrinkage are reduced.

Die Erfindung wird im folgenden anhand der Zeichnung näher erläutert. Diese zeigt
   - zwei Ansichten eines Schutzkontaktsteckers in Schnittdarstellung mit einem von der Grundplatte der Steckerbrücke abstehenden L-förmigen Formteil.The invention is explained below with reference to the drawing. This shows
- Two views of a protective contact plug in a sectional view with an L-shaped molded part protruding from the base plate of the plug bridge.

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 (Grundplatte der Steckerbrücke 1) miteinander verbunden.1 consists essentially 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 (base plate of the plug bridge 1).

Die soweit bezüglich der mechanischen Grundform beschriebene Steckerbrücke 1 ist elektrisch wie folgt bestückt: An der Außenseite der Grundplatte 14 ragen in 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 ensprechenden Bohrungen der Grundplatte 14 und sie sind (am zweiten Ende) rückseitig soweit verlängert, daß sie in Form von hohlzylindrischen Anschlußstiften 16 in den Freiraum 13 des U-förmigen Formteils 10 ragen. Mit diesen Anschlußstiften 16 werden letztlich die Stromleiter einer Verbraucherleitung 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 base plate 14, at a 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 seated in corresponding holes in the base plate 14 and they are (at the second end) on the back extended so far that they protrude in the form of hollow cylindrical connecting pins 16 into the free space 13 of the U-shaped molded part 10. Ultimately, the current conductors of a consumer line are mechanically connected, in particular crimped or crimped, with these connecting pins 16.

Das elektrische System wird durch einen Schutzleiter vervollständigt, der als Teil der Verbraucherleitung mit einer Anschlußbuchse 19 verbunden ist. Die Anschlußbuchse 19 des Schutzleiters ist Teil einer an den Außenseiten der Schenkel 11, 12 des U-förmigen Formteils 10 liegenden Erdungsfeder 20, die beim Einstecken des Schutzkontaktsteckers in eine Netzsteckdose diese mit einer sich im anzuschließenden Gerät befindlichen Kupplung verbindet, so daß der Schutzleiter der Verbraucherleitung und damit das Gerät selbst Erdschluß haben.The electrical system is completed by a protective conductor, which is connected to a connecting socket 19 as part of the consumer line. The connecting socket 19 of the protective conductor is part of an earth spring 20 lying on the outer sides of the legs 11, 12 of the U-shaped molded part 10, which connects the protective contact plug into a mains socket when it is connected to a coupling located in the device to be connected, so that the protective conductor of the Consumer line and thus the device itself have a ground fault.

Die soweit beschriebene Steckerbrücke 1 ist Stand der Technik. Beim Umspritzen dieser Steckerbrücke zwecks Endfertigung des Schutzkontaktsteckers können nun Probleme dahingehend auftreten, daß es bei seitlich abstehenden Einzeldrähtchen der Stromleiter und des Schutzleiters vorkommen kann, daß diese bis nach außen durch den gespritzten Steckerkopf reichen und somit eine Gefahrenquelle bilden.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, problems can now arise in that individual wires of the current conductor and the protective conductor protruding to the side can reach outwards through the molded plug head and thus form a source of danger.

Um dieses Risiko gänzlich auszuschalten und sicher zu gewährleisten, daß die Einzeldrähtchen sicher eingefangen werden, ist die Steckerbrücke 1 mit der Erdungsfeder 20 der älteren Patentanmeldung EP 0 332 034 gemäß so ausgebildet, daß den Anschlußstiften 16 und der Anschlußbuchse 19 eine konische Einführhilfe für die Leiterenden der Stromleiter und des Schutzleiters vorgesetzt ist. Gemäß der vorliegenden Weiterbildung ist diese Einführhilfe für den Schutzleiter wie folgt verifiziert:In order to completely eliminate this risk and to ensure that the individual wires are safely caught, the plug bridge 1 with the earthing spring 20 of the older patent application EP 0 332 034 is designed in such a way that the connecting pins 16 and the connecting socket 19 have a conical insertion aid for the conductor ends of the current conductor and the protective conductor is provided. According to the present training, this insertion aid for the protective conductor is verified as follows:

Dem der Anschlußbuchse 19 für den Schutzleiter benachbarten Schenkel 11 des U ist - als integrierter Bestandteil der Spritzform für die Grundplatte der Steckerbrücke 1 - ein von dieser Grundplatte 1 abstehendes L-förmiges Formteil 21 angespritzt. Dieses Formteil 21 steht parallel zu den Schenkeln 11, 12 des U-förmigen Formteils 10 und ragt über die Anschlußbuchse 19 hinaus; das Formteil 21 stützt sich also über einen von einem L-Schenkel gebildeten Stützfuß 22 an der Grundplatte 14 der Steckerbrücke 1 ab.To the connecting socket 19 for the protective conductor adjacent leg 11 of the U is - as an integral part of the injection mold for the base plate of the connector bridge 1 - an L-shaped molding 21 protruding from this base plate 1. This molded part 21 is parallel to the legs 11, 12 of the U-shaped molded part 10 and protrudes beyond the connecting socket 19; the molded part 21 is thus supported on the base plate 14 of the connector bridge 1 by a support leg 22 formed by an L-leg.

Am freien Ende ist der den Stützfuß 22 bildende L-Schenkel rechtwinklig so abgekröpft, daß sich eine zum benachbarten Schenkel 11 hin gerichtete Überdachung 23 für die Anschlußbuchse 19 des Schutzleiters ergibt. Diese Überdachung 23 wird letztlich vom kurzen Schenkel des L-förmigen Formteils 21 gebildet.At the free end of the L-leg forming the support leg 22 is bent at right angles so that there is a canopy 23 facing the adjacent leg 11 for the connection socket 19 of the protective conductor. This canopy 23 is ultimately formed by the short leg of the L-shaped molded part 21.

Ein wesentliches Teilmerkmal des L-förmigen Formteils 21 ist eine koaxial zur zugehörigen Anschlußbuchse 19 liegende konische Durchgangsbohrung 24, deren kleinerer Durchmesser der Stirnseite der Anschlußbuchse 19 gegenüberliegt. So ergibt sich zur freien Seite des L-förmigen Formteils 21 hin eine trichterförmige Erweiterung, über die sich das abisolierte Leitungsende des Schutzleiters leicht und sicher in die Anschlußbuchse 19 einführen läßt.An essential partial feature of the L-shaped molded part 21 is a conical through bore 24 lying coaxially with the associated connecting socket 19, the smaller diameter of which lies opposite the end face of the connecting socket 19. This results in a funnel-shaped extension toward the free side of the L-shaped molded part 21, via which the stripped line end of the protective conductor can be easily and securely inserted into the connecting socket 19.

Für den Fall, daß wider Erwarten doch einmal ein Einzeldrähtchen des Schutzleiters abknicken und abstehen sollte, ist die Materialstärke des L-förmigen Formteils 21 im Bereich der Durchgangsbohrung 24 so gewählt, daß - der Länge der Abioslierung entsprechend - dieses Einzeldrähtchen sicher hinter der Oberkante der Durchgangsbohrung 24 verschwindet.In the event that, contrary to expectations, a single wire of the protective conductor should bend and protrude, the material thickness of the L-shaped molded part 21 in the area of the through hole 24 is selected so that - according to the length of the Abioslierung - this single wire safely behind the upper edge of the Through hole 24 disappears.

Der Schutzleiter läßt sich somit sicher mit Hilfe des L-förmigen Formteils 21 bzw. der konischen Durchgangsbohrung 24 einführen und fixieren, beispielsweise durch Quetschen bzw. Crimpen.The protective conductor can thus be securely inserted and fixed using the L-shaped molded part 21 or the conical through-hole 24, for example by squeezing or crimping.

Claims (1)

  1. A safety plug for electrical devices which can be plugged into a mains socket, with a plug bridge (1) having a substantially U-shaped moulded part (10) for fixing an earthing spring (20) with a hollow cylindrical terminal pin (19) for the protective conductor of a consumer's cable
    - wherein the conductor ends of the protective conductor, with the ends insulated, are plugged into the terminal pin and firmly connected thereto,
    - wherein an inlet funnel (24) with a conical trough hole is assigned to the terminal pin, and
    - wherein synthetic material is injected round the plug bridge and an end piece of the consumer's cable in an injection mould,
    characterized in that
    - the inlet funnel (24) is formed at a L-shaped moulded part (21) which is projecting from the flush baseplate of the plug bridge (1), projecting over the terminal pin (19), and consisting of a supporting foot (22) and a cover (23),
    - wherein the supporting foot (22) is arranged as an integral part of the baseplate standing vertically to the legs (11,12) of the U-shaped moulded part (10) in the central area of said baseplate, and wherein the cover (23) is aligned towards the adjacent leg (11).
EP90106261A 1989-04-07 1990-04-02 Connector with protective contact and with a lead-in help coordinated to the connection socket of the protective contact Expired - Lifetime EP0391298B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911315 1989-04-07
DE19893911315 DE3911315C2 (en) 1988-03-09 1989-04-07 Earthing contact plug with an insertion aid assigned to the connection socket for the protective conductor

Publications (3)

Publication Number Publication Date
EP0391298A2 EP0391298A2 (en) 1990-10-10
EP0391298A3 EP0391298A3 (en) 1991-03-27
EP0391298B1 true EP0391298B1 (en) 1994-08-24

Family

ID=6378098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106261A Expired - Lifetime EP0391298B1 (en) 1989-04-07 1990-04-02 Connector with protective contact and with a lead-in help coordinated to the connection socket of the protective contact

Country Status (2)

Country Link
EP (1) EP0391298B1 (en)
ES (1) ES2060843T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012583C2 (en) * 1990-04-20 1996-11-28 Taller Gmbh Earthing contact plug with base plate and earthing spring
DE19543235C1 (en) * 1995-11-10 1996-12-19 Taller Gmbh Earthing contact plug with earth wire connection bush insertion aid
CN109888516B (en) * 2019-03-28 2020-07-28 国家电网有限公司 Grounding connecting plate dismounting and fixing device for combined electrical apparatus and use method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328992A2 (en) * 1988-02-17 1989-08-23 Schaar, Gerhard Electrical plug connector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1540151A1 (en) * 1965-02-24 1969-12-11 Merten Geb Electrical device with protective contact
DE2532872C3 (en) * 1975-07-23 1979-11-15 Kabelwerke Reinshagen Gmbh, 5600 Wuppertal Electrical connector and process for their manufacture
FR2538625A1 (en) * 1982-12-23 1984-06-29 Cemrep Plug with pins for an electrical power connection
DE8817241U1 (en) * 1988-03-09 1995-05-11 Taller Gmbh, 76337 Waldbronn Earthing contact plug with jumper and hollow cylindrical connecting pins for the current conductor and the protective conductor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328992A2 (en) * 1988-02-17 1989-08-23 Schaar, Gerhard Electrical plug connector

Also Published As

Publication number Publication date
EP0391298A3 (en) 1991-03-27
ES2060843T3 (en) 1994-12-01
EP0391298A2 (en) 1990-10-10

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