EP0582779B1 - Safety plug for connecting or disconnecting rails for telecommunication or data technology - Google Patents

Safety plug for connecting or disconnecting rails for telecommunication or data technology Download PDF

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Publication number
EP0582779B1
EP0582779B1 EP93106602A EP93106602A EP0582779B1 EP 0582779 B1 EP0582779 B1 EP 0582779B1 EP 93106602 A EP93106602 A EP 93106602A EP 93106602 A EP93106602 A EP 93106602A EP 0582779 B1 EP0582779 B1 EP 0582779B1
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EP
European Patent Office
Prior art keywords
contact
surge arrester
voltage surge
plastic body
safety plug
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
EP93106602A
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German (de)
French (fr)
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EP0582779A1 (en
Inventor
Wilhelm Bramkamp
Ingo Dohnke
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ADC GmbH
Original Assignee
Krone GmbH
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Publication date
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Publication of EP0582779A1 publication Critical patent/EP0582779A1/en
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Publication of EP0582779B1 publication Critical patent/EP0582779B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00Details of spark gaps
    • H01T1/14Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00Overvoltage arresters using spark gaps
    • H01T4/06Mounting arrangements for a plurality of overvoltage arresters

Definitions

  • the invention relates to a protective plug for connecting and isolating strips in telecommunications and data technology.
  • a protective plug of this type is previously known from DE 27 38 851 C3.
  • the free end of the rear leg of the U-shaped holder is at a distance from the associated electrode of the surge arrester, which only in the event of a longer overvoltage which drives a current through the surge arrester and heats it up Melting the melting element is bridged.
  • the protective plug may no longer be used as long as this distance is present, but is less than required and as originally specified by the non-plasticized fusible element, because the characteristics of the arresters change. In principle, the arrester and fusible element should be replaced each time the fail safe (thermal protection) is triggered.
  • the invention is therefore based on the object of ensuring the permanent short circuit after the first triggering of the fail safe (thermal protection).
  • the invention provides that the extension of the rear leg of the U-shaped holder is designed as a contact spring protruding into the recess of the surge arrester. This causes the arrester after softening the melting element into a position between two spring elements, namely the front, resilient leg of the U-shaped holder located on the front of the plastic body and the contact spring as an extension of the rear leg of the U-shaped holder, which is under the Back pressure is resiliently moved by the adjacent electrode of the surge arrester.
  • a re-solidification of the fusible element and its possible expansion in the ⁇ range cause that the surge arrester is moved back by a corresponding ⁇ range, but that the contact spring can follow this path as an extension of the rear leg of the U-shaped holder, so that a constant Short circuit is ensured.
  • the contact spring is dimensioned as an extension of the rear leg of the U-shaped holder so that when the melting element melts through the surge arrester it is tensioned by the spring force of the opposite front leg of the U-shaped holder and thus forms a secure contact.
  • the cage formed from a plurality of U-shaped holders is easy to assemble by sliding the front free ends of the individual holders when the cage is pushed onto the plastic body over the respectively assigned webs and then be pushed onto the arresters, which are located directly at the end of the webs.
  • the protective plug for connecting and isolating strips of telecommunications and data technology consists of a flat plastic body 1 with ten cutouts 2 for receiving a surge arrester 3 and a respective melting element 4 and a cage 5, which is plugged onto the plastic body 1, and consists of ten U-shaped holders 6 , which are each assigned to a surge arrester 3.
  • a contact element 8 forming the plug contact 7 is embedded in the lower part of each recess 2, the end of the contact element 7 opposite the plug contact 7 ending in the region of the recess 2 and the bottom of the Forms recess.
  • the upper part of the flat plastic body 1 shown in FIG. 7 is provided on the front side with shorter and longer webs 9, 10, which are arranged alternately and are each assigned to a recess 2 (FIG. 6).
  • Each U-shaped holder 6 comprises a front leg 11 which ends in an arcuate spring element 12 which acts on the front electrode 13 of the button-shaped surge arrester 3, as shown in FIGS. 1 and 8.
  • the rear leg 14 of each U-shaped holder 6 bears against the rear of the plastic body 1, as shown in FIGS. 1 and 8.
  • Each U-shaped holder 6 forms an extension of its rear leg 14 from a narrow contact spring 15, as shown in particular in Fig. 3, which is designed as a leaf spring and the inside of which is at a smaller distance from the rear electrode 16 of the surge arrester 3 than the inside of the contact element 8 forming the plug contact 7.
  • each front leg 11 is located at a distance of approximately the radius of the surge arrester 3 from the recess 2, for which purpose the rear of the plastic body 1 has a recess 17.
  • Each contact spring 15 forms a contact which is carried out by a spring element. This is dimensioned such that when the melting element 4 melts through the surge arrester 3 from the spring element 12 is tensioned and thus forms a secure contact.
  • the design of the spring elements 12 is such that they work almost independently of the contact spring 15.
  • each surge arrester 3 namely on the front side the spring element 12 formed from the front leg 11 and on the rear side an extension of the rear leg 14 forming contact spring 15.
  • Both spring elements are arranged on one component, the U-shaped holder 6 and the cage 5 and work almost independently of one another in the overall construction.
  • the front spring element 12 presses via the surge arrester 3 against the horseshoe-shaped melting element 4, which in turn rests on the inside of the contact element 8. In the event of an overvoltage with higher power, heating occurs, which results in softening or plasticizing of the melting element 4.
  • the spring force of the spring element 12 on the front of the surge arrester 3 causes a displacement of the surge arrester 3 against the contact element 8 and thus a contact of the associated electrode 16 of the surge arrester 3 with the contact spring 15, which is at ground potential via the cage 5. There is a short circuit.
  • incisions 20 are made into the base 19 of the U-shaped holder 6, as shown in FIG. 4.
  • 5 shows the different lengths of the front legs 11 of the adjacent U-shaped holders 6, with a long and a short spring element 12 being alternately assigned to the surge arresters 3 arranged in two rows and offset from one another.
  • Each recess 2 for a surge arrester 3 is assigned a web 9, 10 in the plastic body 1, which has an increasing height from the upper edge 21 of the plastic body 1 to the recess 2, as can be seen in FIG. 7.
  • These webs 9, 10 enable a slight pushing of the front legs 11 of the U-shaped holder 6 onto the surge arrester 3 during assembly of the protective plug with inserted surge arresters 3 and solder rings 4.
  • the webs 9, 10, which thus have a rising incline, are used in the Assembly of the spring elements 12 formed from the front legs 11 of the U-shaped holder 6 is automatically prestressed.

Landscapes

  • Fuses (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Near-Field Transmission Systems (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Emergency Lowering Means (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Semiconductor Memories (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The invention relates to a safety plug for connecting and isolating strip connectors for telecommunications and data technology. Said safety plug consists of a flat plastic body 1 having cutouts 2 for accommodating overvoltage suppressors 3, and of a cage 5 which is plugged onto the plastic body 1 and consists of a plurality of U-shaped holders 6 whose front limbs 11 press against one electrode 13 of the overvoltage suppressor 3 and whose rearward limbs 14 rest against the rear side of the plastic body 1. A plug contact 7, which forms the contact element 8, is embedded in the safety plug. A fuse link 4 is arranged between the contact element 8 and the other electrode 16 of the overvoltage suppressor 3. In order to ensure the continuous short-circuit state in the event of the failsafe tripping, a contact spring is provided according to the invention as an extension of the rearward limb 14 of the U-shaped holder 6, which contact spring projects into the cutout 2 for accommodating the overvoltage suppressor. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Schutzstecker für Anschluß- und Trennleisten der Telekommunikations- und Datentechnik.The invention relates to a protective plug for connecting and isolating strips in telecommunications and data technology.

Ein Schutzstecker dieser Art ist aus der DE 27 38 851 C3 vorbekannt. Mittels des zwischen dem Kontaktelement und dem Überspannungsableiter befindlichen Schmelzelementes hat das freie Ende des rückwärtigen Schenkels des U-förmigen Halters zur zugeordneten Elektrode des Überspannungsableiters einen Abstand, der erst im Falle einer längeren Überspannung, die durch den Überspannungsableiter einen Strom treibt und diesen erwärmt, durch Schmelzen des Schmelzelementes überbrückt wird.A protective plug of this type is previously known from DE 27 38 851 C3. By means of the melting element located between the contact element and the surge arrester, the free end of the rear leg of the U-shaped holder is at a distance from the associated electrode of the surge arrester, which only in the event of a longer overvoltage which drives a current through the surge arrester and heats it up Melting the melting element is bridged.

Es ist bei derartigen Schutzsteckern mit einem Thermoschutz (Fail Safe) bekannt, daß bei einer kurzzeitigen Überspannung, die einen geringen Strom durch den Überspannungsableiter treibt, kein Abschmelzen des Schmelzelementes erfolgt. Die Ableitung der Überspannung erfolgt über den Überspannungsableiter und über den U-förmigen Halter an Masse. Erst eine längere Überspannung und der Umsatz einer Leistung im Überspannungsableiter erzeugen eine Erwärmung des Ableiters, die das Schmelzelement in den plastischen Bereich überführt. Beim Schmelzen des Schmelzelementes wird der Ableiter gegen das Kontaktelement verschoben. Durch Andrücken des Überspannungsableiters am Kontaktelement und am freien rückwärtigen Ende des U-förmigen Halters wird ein Kontakt geschlossen, der den Überspannungsableiter elektrisch überbrückt.It is with such protective plugs with thermal protection (Fail Safe) known that in the event of a brief overvoltage that drives a low current through the surge arrester, the melting element does not melt. The surge voltage is discharged via the surge arrester and the U-shaped holder to ground. Only a longer overvoltage and the conversion of a power in the surge arrester generate heating of the arrester, which transfers the melting element into the plastic area. When the melting element melts, the arrester is moved against the contact element. By pressing the surge arrester on the contact element and on the free rear end of the U-shaped holder, a contact is closed that electrically bridges the surge arrester.

Durch die Schließung des Kontaktes erfolgt eine Reduzierung der umgesetzten Leistung im Schutzstecker mit der Folge einer Abkühlung und eines Wiedererstarrens des verbliebenen Restes des Schmelzelementes. Dieser Aufbau des Fail-Safe-Kontaktes kann durch unterschiedliche Werkstoffpaarungen und den damit verbundenen verschiedenen thermischen Ausdehnungen der Einzelteile einen Einfluß auf die Güte des Kontaktes haben. Die Folge ist, daß nicht in jedem Fall der Kurzschlußkontakt sichergestellt ist, sondern die Schutzfunktion des Schutzsteckers wieder vorhanden sein kann. Diese neue Schutzfunktion erfüllt aber nicht die geforderten Isolationsbedingungen, d.h. den notwendigen Abstand zwischen dem freien, rückwärtigen Ende (Elektrode) des U-förmigen Halters und der diesem zugeordneten Elektrode des Ableiters. Solange dieser Abstand zwar vorhanden, aber geringer ist, als gefordert und als ursprünglich durch das nicht plastifizierte Schmelzelement vorgegeben, darf der Schutzstecker nicht mehr verwendet werden, weil sich die Ableiter in ihren Kenndaten verändern. Grundsätzlich soll nach jedem Auslösen des Fail Safe (Thermoschutz) ein Auswechseln von Ableiter und Schmelzelement erfolgen.By closing the contact there is a reduction in the implemented power in the protective plug, with the result that the remaining remainder of the melting element cools down and solidifies again. This structure of the fail-safe contact can have an influence on the quality of the contact due to different material pairings and the associated different thermal expansions of the individual parts. The result is that the short-circuit contact is not guaranteed in every case, but the protective function of the protective plug can be present again. However, this new protective function does not meet the required insulation conditions, ie the necessary distance between the free, rear end (electrode) of the U-shaped holder and the electrode of the arrester assigned to it. The protective plug may no longer be used as long as this distance is present, but is less than required and as originally specified by the non-plasticized fusible element, because the characteristics of the arresters change. In principle, the arrester and fusible element should be replaced each time the fail safe (thermal protection) is triggered.

Der Erfindung liegt von daher die Aufgabe zugrunde, den ständigen Kurzschluß nach erstmaliger Auslösung des Fail Safe (Thermoschutz) sicherzustellen.The invention is therefore based on the object of ensuring the permanent short circuit after the first triggering of the fail safe (thermal protection).

Die lösung dieser Aufgabe gelingt gemäß Anspruch 1.This object is achieved according to claim 1.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß die Verlängerung des rückwärtigen Schenkels des U-förmigen Halters als eine in die Aussparung des Überspannungsableiters hineinragende Kontaktfeder ausgebildet ist. Hierdurch kommt der Ableiter nach dem Erweichen des Schmelzelementes in eine Lage zwischen zwei Federelementen, nämlich dem auf der Vorderseite des Kunststoffkörpers befindlichen vorderen, federnden Schenkel des U-förmigen Halters und der Kontaktfeder als Verlängerung des rückwärtigen Schenkels des U-förmigen Halters, der unter dem Gegendruck durch die anliegende Elektrode des Überspannungsableiters federnd bewegt wird. Ein Wiedererstarren des Schmelzelementes und dessen mögliche Ausdehnung im µ-Bereich bewirken, daß zwar der Überspannungsableiter um einen entsprechenden µ-Bereich zurückbewegt wird, daß jedoch die Kontaktfeder als Verlängerung des rückwärtigen Schenkels des U-förmigen Halters diesem Weg nachfolgen kann, so daß ein ständiger Kurzschluß sichergestellt ist. Dabei ist die Kontaktfeder als Verlängerung des rückwärtigen Schenkels des U-förmigen Halters so dimensioniert, daß diese beim Abschmelzen des Schmelzelementes durch den Überspannungsableiter von der Federkraft des gegenüberliegenden vorderen Schenkels des U-förmigen Halters gespannt wird und so einen sicheren Kontakt bildet. Die Wirkungsweise der beiden Federelemente, welche im Überspannungsfall den Überspannungsableiter zwischen sich einspannen, ist nahezu getrennt ausgeführt, weil die Innenseite der Kontaktfeder dichter an der entsprechenden Elektrode des Überspannungsableiters liegt als die Innenseite des den Steckkontakt bildenden Kontaktelementes, an welchem das Schmelzelement anliegt. Somit ist gewährleistet, daß die Elektrode des Überspannungsableiters die, gemäß den Merkmalen des Anspruchs 2, als Blattfeder ausgebildete Kontaktfeder bereits dann berührt und federnd auslenkt, wenn das Schmelzelement noch nicht vollständig abgeschmolzen ist bzw. in die Ausnehmung des in Knopfform ausgebildeten Überspannungsableiters hineingedrückt ist.To achieve this object, the invention provides that the extension of the rear leg of the U-shaped holder is designed as a contact spring protruding into the recess of the surge arrester. This causes the arrester after softening the melting element into a position between two spring elements, namely the front, resilient leg of the U-shaped holder located on the front of the plastic body and the contact spring as an extension of the rear leg of the U-shaped holder, which is under the Back pressure is resiliently moved by the adjacent electrode of the surge arrester. A re-solidification of the fusible element and its possible expansion in the µ range cause that the surge arrester is moved back by a corresponding µ range, but that the contact spring can follow this path as an extension of the rear leg of the U-shaped holder, so that a constant Short circuit is ensured. The contact spring is dimensioned as an extension of the rear leg of the U-shaped holder so that when the melting element melts through the surge arrester it is tensioned by the spring force of the opposite front leg of the U-shaped holder and thus forms a secure contact. The operation of the two spring elements, which clamp the surge arrester between them in the event of an overvoltage, is carried out almost separately because the inside of the contact spring is closer to the corresponding electrode of the surge arrester than the inside of the contact element forming the plug contact which the melting element rests on. This ensures that the electrode of the surge arrester touches and deflects the spring formed as a leaf spring according to the features of claim 2 when the melting element has not yet completely melted or is pressed into the recess of the surge arrester in the form of a button.

Gemäß den Merkmalen des Anspruches 3 wird sichergestellt, daß der Abstützpunkt der Kontaktfeder auf der Rückseite des Kunststoffkörpers höher gezogen ist, um die Kontaktfeder aus dem Material des U-förmigen Halters zu realisieren, aber auch die Abstützung des Federelementes im rückwärtigen Schenkel noch sicherzustellen.According to the features of claim 3 it is ensured that the support point of the contact spring on the back of the plastic body is pulled higher to realize the contact spring from the material of the U-shaped holder, but also to ensure the support of the spring element in the rear leg.

Gemäß den Merkmalen des Anspruches 4 wird erreicht, daß die einzelnen Federschenkel auf der Vorderseite des U-förmigen Halters nahezu unabhängig voneinander federnd ausgebildet sind, so daß ein größerer Federweg zur Abstützung des vorderen Federschenkels gewonnen wird.According to the features of claim 4 it is achieved that the individual spring legs on the front of the U-shaped holder are formed almost independently of each other, so that a larger spring travel is obtained to support the front spring leg.

Schließlich wird mit den Merkmalen des Anspruches 5 erreicht, daß der aus einer Mehrzahl von U-förmigen Haltern gebildete Käfig leicht zu montieren ist, indem die vorderen freien Enden der einzelnen Halter beim Aufschieben des Käfigs auf den Kunststoffkörper über die jeweils zugeordneten Stege gleiten und anschließend auf die Ableiter aufgeschoben werden, die sich unmittelbar am Ende der Stege befinden.Finally, it is achieved with the features of claim 5 that the cage formed from a plurality of U-shaped holders is easy to assemble by sliding the front free ends of the individual holders when the cage is pushed onto the plastic body over the respectively assigned webs and then be pushed onto the arresters, which are located directly at the end of the webs.

Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles eines Schutzsteckers für Anschluß- und Trennleisten der Telekommunikations- und Datentechnik näher erläutert. Es zeigen:

Fig. 1
Einen Querschnitt durch den aus einem flachen Kunststoffkörper mit aufgestecktem Käfig aus U-förmigen Haltern, aus Überspannungsableitern und Lotringen gebildeten Schutzstecker in vergrößertem Maßstab,
Fig. 2
eine Vorderansicht des aus mehreren U-förmigen Haltern gebildeten Käfigs in natürlicher Größe,
Fig. 3
eine Rückansicht des Käfigs in vergrößertem Maßstab,
Fig. 4
eine Draufsicht auf den Käfig gemäß Fig. 3,
Fig. 5
einen Schnitt durch den Käfig in vergrößertem Maßstab,
Fig. 6
eine Draufsicht auf den flachen Kunststoffkörper in natürlicher Größe,
Fig. 7
einen Schnitt durch den Kunststoffkörper in vergrößertem Maßstab und
Fig. 8
einen Schnitt durch den Schutzstecker gemäß Fig. 1 nach dem Erweichen und Wegdrücken des Schmelzelementes.
The invention is explained in more detail below with reference to an embodiment of a protective plug for connecting and isolating strips of the telecommunications and data technology shown in the drawings. Show it:
Fig. 1
A cross section through the protective plug formed from a flat plastic body with an attached cage made of U-shaped holders, surge arresters and solder rings on an enlarged scale,
Fig. 2
3 shows a front view of the cage, which is formed from a plurality of U-shaped holders, in its natural size,
Fig. 3
a rear view of the cage on an enlarged scale,
Fig. 4
3 shows a plan view of the cage according to FIG. 3,
Fig. 5
a section through the cage on an enlarged scale,
Fig. 6
a top view of the flat plastic body in natural size,
Fig. 7
a section through the plastic body on an enlarged scale and
Fig. 8
a section through the protective plug of FIG. 1 after softening and pushing away the melting element.

Der Schutzstecker für Anschluß-und Trennleisten der Telekommunikations-und Datentechnik besteht aus einem flachen Kunststoffkörper 1 mit zehn Aussparungen 2 zur Aufnahme von je einem Überspannungsableiter 3 und jeweils einem Schmelzelement 4 sowie einem auf den Kunststoffkörper 1 aufgesteckten Käfig 5 aus zehn U-förmigen Haltern 6, die jeweils einem Überspannungsableiter 3 zugeordnet sind.The protective plug for connecting and isolating strips of telecommunications and data technology consists of a flat plastic body 1 with ten cutouts 2 for receiving a surge arrester 3 and a respective melting element 4 and a cage 5, which is plugged onto the plastic body 1, and consists of ten U-shaped holders 6 , which are each assigned to a surge arrester 3.

In den in Fig. 6 in Vorderansicht und Fig. 7 im Schnitt dargestellten Kunststoffkörper 1 ist im unteren Teil zu jeder Aussparung 2 ein den Steckkontakt 7 bildendes Kontaktelement 8 eingebettet, dessen dem Steckkontakt 7 entgegengesetztes Ende im Bereich der Aussparung 2 endet und den Boden der Aussparung bildet. Der in Fig. 7 dargestellte obere Teil des flachen Kunststoffkörpers 1 ist auf der Vorderseite mit kürzeren und längeren Stegen 9,10 versehen, die abwechselnd angeordnet sind und jeweils einer Aussparung 2 zugeordnet sind (Fig.6).In the plastic body 1 shown in FIG. 6 in front view and FIG. 7 in section, a contact element 8 forming the plug contact 7 is embedded in the lower part of each recess 2, the end of the contact element 7 opposite the plug contact 7 ending in the region of the recess 2 and the bottom of the Forms recess. The upper part of the flat plastic body 1 shown in FIG. 7 is provided on the front side with shorter and longer webs 9, 10, which are arranged alternately and are each assigned to a recess 2 (FIG. 6).

Der aus den zehn U-förmigen Haltern 6 einstückig ausgebildete Käfig 5 übergreift das freie obere Ende des Kunststoffkörpers 1, wie es in Figuren 1 und 8 dargestellt ist. Jeder U-förmige Halter 6 umfaßt einen vorderen Schenkel 11, der in einem bogenförmigen Federelement 12 endet, das die vordere Elektrode 13 des knopfförmigen Überspannungsableiters 3 beaufschlagt, wie es in den Figuren 1 und 8 dargestellt ist. Der rückwärtige Schenkel 14 eines jeden U-förmigen Halters 6 liegt an der Rückseite des Kunststoffkörpers 1 an, wie es in den Figuren 1 und 8 dargestellt ist. Jeder U-förmige Halter 6 bildet als Verlängerung seines rückwärtigen Schenkels 14 eine schmale Kontaktfeder 15 aus, wie es insbesondere in Fig. 3 dargestellt ist, die wie eine Blattfeder ausgebildet ist und deren Innenseite einen kleineren Abstand zur rückwärtigen Elektrode 16 des Überspannungsableiters 3 aufweist als die Innenseite des den Steckkontakt 7 bildenden Kontaktelementes 8. Es ergibt sich ein Versatz der genannten Innenseiten. Der Abstützpunkt 18 jedes vorderen Schenkels 11 liegt im Abstand von etwa dem Radius des Überspannungsableiters 3 entfernt von der Aussparung 2, wozu die Rückseite des Kunststoffkörpers 1 eine Aussparung 17 aufweist. Jede Kontaktfeder 15 bildet einen Kontakt, der durch ein Federelement ausgeführt ist. Dieses ist so dimensioniert, daß es beim Abschmelzen des Schmelzelementes 4 durch den Überspannungsableiter 3 von dem Federelement 12 gespannt wird und so einen sicheren Kontakt bildet. Die Ausführung der Federelemente 12 ist derart, daß diese nahezu unabhängig von der Kontaktfeder 15 arbeiten.The cage 5 formed in one piece from the ten U-shaped holders 6 engages over the free upper end of the plastic body 1, as shown in FIGS. 1 and 8. Each U-shaped holder 6 comprises a front leg 11 which ends in an arcuate spring element 12 which acts on the front electrode 13 of the button-shaped surge arrester 3, as shown in FIGS. 1 and 8. The rear leg 14 of each U-shaped holder 6 bears against the rear of the plastic body 1, as shown in FIGS. 1 and 8. Each U-shaped holder 6 forms an extension of its rear leg 14 from a narrow contact spring 15, as shown in particular in Fig. 3, which is designed as a leaf spring and the inside of which is at a smaller distance from the rear electrode 16 of the surge arrester 3 than the inside of the contact element 8 forming the plug contact 7. There is an offset of the inside mentioned. The support point 18 of each front leg 11 is located at a distance of approximately the radius of the surge arrester 3 from the recess 2, for which purpose the rear of the plastic body 1 has a recess 17. Each contact spring 15 forms a contact which is carried out by a spring element. This is dimensioned such that when the melting element 4 melts through the surge arrester 3 from the spring element 12 is tensioned and thus forms a secure contact. The design of the spring elements 12 is such that they work almost independently of the contact spring 15.

Zwischen der Innenseite des den Steckkontakt 7 bildenden Kontaktelementes 8 und der rückwärtigen Elektrode 16 des Überspannungsableiters 3 befindet sich ein hufeisenförmig ausgebildetes Schmelzelement 4, das in Fig. 1 dargestellt ist. Dieses hält die zugehörige Elektrode 16 in einem Abstand zur Kontaktfeder 15 des zugeordneten U-förmigen Halters 6.Between the inside of the contact element 8 forming the plug contact 7 and the rear electrode 16 of the surge arrester 3 there is a horseshoe-shaped melting element 4, which is shown in FIG. 1. This holds the associated electrode 16 at a distance from the contact spring 15 of the associated U-shaped holder 6.

Der vorbeschriebene Schutzstecker arbeitet wie folgt:The protective plug described above works as follows:

Aus dem Federmaterial des Käfigs 5 von etwa 0,4 mm Stärke bzw. der diesen bildenden U-förmigen Halter 6 sind für jeden Überspannungsableiter 3 zwei Federelemente realisiert, nämlich auf der Vorderseite das aus dem vorderen Schenkel 11 ausgebildete Federelement 12 und auf der Rückseite die eine Verlängerung des rückwärtigen Schenkels 14 bildende Kontaktfeder 15. Beide Federelemente sind an einem Bauteil, dem U-förmigen Halter 6 bzw. dem Käfig 5 angeordnet und arbeiten in der Gesamtkonstruktion nahezu unabhängig voneinander. Das vordere Federelement 12 drückt über den Überspannungsableiter 3 gegen das hufeisenförmige Schmelzelement 4, das wiederum an der Innenseite des Kontaktelementes 8 anliegt. Im Falle einer Überspannung mit höherer Leistung tritt eine Erwärmung auf, die ein Erweichen bzw. eine Plastifizierung des Schmelzelementes 4 zur Folge hat. Die Federkraft des Federelementes 12 auf der Vorderseite des Überspannungsableiters 3 bewirkt eine Verschiebung des Überspannungsableiters 3 gegen das Kontaktelement 8 und damit eine Kontaktierung der zugeordneten Elektrode 16 des Überspannungsableiters 3 mit der Kontaktfeder 15, die über den Käfig 5 auf Erdpotential liegt. Es erfolgt ein Kurzschluß.From the spring material of the cage 5 of about 0.4 mm thickness or the U-shaped holder 6 forming this, two spring elements are realized for each surge arrester 3, namely on the front side the spring element 12 formed from the front leg 11 and on the rear side an extension of the rear leg 14 forming contact spring 15. Both spring elements are arranged on one component, the U-shaped holder 6 and the cage 5 and work almost independently of one another in the overall construction. The front spring element 12 presses via the surge arrester 3 against the horseshoe-shaped melting element 4, which in turn rests on the inside of the contact element 8. In the event of an overvoltage with higher power, heating occurs, which results in softening or plasticizing of the melting element 4. The spring force of the spring element 12 on the front of the surge arrester 3 causes a displacement of the surge arrester 3 against the contact element 8 and thus a contact of the associated electrode 16 of the surge arrester 3 with the contact spring 15, which is at ground potential via the cage 5. There is a short circuit.

Durch Schließung der Kontaktverbindung zwischen dem Kontaktelement 8 und der Kontaktfeder 15 über die zugeordnete Elektrode 16 des Überspannungsableiters 3 erfolgt somit eine Reduzierung der am Schutzstecker umgesetzten Leistung mit der Folge einer Abkühlung und eines Wiedererstarrens des verbliebenen Restes des Schmelzelementes 4. Dabei auftretende Bewegungen haben infolge der Ausbildung der Kontaktfeder 15 am rückwärtigen Schenkel 14 des Käfigs 5 als federndes Element keinen Einfluß auf die Kontaktgüte, so daß eine Sicherstellung der Kontaktverbindung gewährleistet ist.By closing the contact connection between the contact element 8 and the contact spring 15 via the associated electrode 16 of the surge arrester 3, there is thus a reduction in the power implemented on the protective plug, with the result of cooling and re-solidification of the remaining remainder of the fusible element 4 Formation of the contact spring 15 on the rear leg 14 of the cage 5 as a resilient element has no influence on the contact quality, so that a guarantee of the contact connection is ensured.

Zur Entkopplung untereinander und zur Sicherstellung einer kleinen Federkonstanten der einzelnen Federelemente 12 der vorderen Schenkel 11 eines jeden U-förmigen Halters 6 sind bis in die Basis 19 des U-förmigen Halters 6 Einschnitte 20 geführt, wie es in Fig. 4 dargestellt ist. Die Fig. 5 zeigt die unterschiedlich lange Ausbildung der vorderen Schenkel 11 der nebeneinanderliegenden U-förmigen Halter 6, wobei abwechselnd jeweils ein langes und ein kurzes Federelement 12 den in zwei Reihen und versetzt zueinander angeordneten Überspannungsableitern 3 zugeordnet ist.For decoupling from one another and to ensure a small spring constant of the individual spring elements 12 of the front legs 11 of each U-shaped holder 6, incisions 20 are made into the base 19 of the U-shaped holder 6, as shown in FIG. 4. 5 shows the different lengths of the front legs 11 of the adjacent U-shaped holders 6, with a long and a short spring element 12 being alternately assigned to the surge arresters 3 arranged in two rows and offset from one another.

Jeder Aussparung 2 für einen Überspannungsableiter 3 ist im Kunststoffkörper 1 ein Steg 9,10 zugeordnet, der von der Oberkante 21 des Kunststoffkörpers 1 zur Aussparung 2 hin eine zunehmende Höhe aufweist, wie es aus Fig. 7 hervorgeht. Diese Stege 9, 10 ermöglichen bei der Montage des Schutzsteckers mit eingesetzten Überspannungsableitern 3 und Lotringen 4 ein leichtes Aufschieben der vorderen Schenkel 11 der U-förmigen Halter 6 auf die Überspannungsableiter 3. Durch die somit eine ansteigende Schräge besitzenden Stege 9,10 werden bei der Montage die aus den vorderen Schenkeln 11 der U-förmigen Halter 6 gebildeten Federelemente 12 automatisch vorgespannt.Each recess 2 for a surge arrester 3 is assigned a web 9, 10 in the plastic body 1, which has an increasing height from the upper edge 21 of the plastic body 1 to the recess 2, as can be seen in FIG. 7. These webs 9, 10 enable a slight pushing of the front legs 11 of the U-shaped holder 6 onto the surge arrester 3 during assembly of the protective plug with inserted surge arresters 3 and solder rings 4. The webs 9, 10, which thus have a rising incline, are used in the Assembly of the spring elements 12 formed from the front legs 11 of the U-shaped holder 6 is automatically prestressed.

BezugszeichenlisteReference list

  • 01 Kunststoffkörper01 plastic body
  • 02 Aussparung02 recess
  • 03 Überspannungsableiter03 surge arrester
  • 04 Schmelzelement04 melting element
  • 05 Käfig05 cage
  • 06 U-förmiger Halter06 U-shaped holder
  • 07 Steckkontakt07 plug contact
  • 08 Kontaktelement08 contact element
  • 09 Steg09 footbridge
  • 10 Steg10 bridge
  • 11 vorderer Schenkel11 front legs
  • 12 Federelement12 spring element
  • 13 vordere Elektrode von 0313 front electrode from 03
  • 14 rückwärtiger Schenkel14 rear leg
  • 15 Kontaktfeder15 contact spring
  • 16 rückwärtige Elektrode von 0316 rear electrode from 03
  • 17 Aussparung17 recess
  • 18 Abstützpunkt18 support point
  • 19 Basis19 base
  • 20 Einschnitt20 incision
  • 21 Oberkante21 top edge
  • 22 Federbügel22 spring clips

Claims (5)

  1. A safety plug for connecting and disconnecting rails for telecommunication and data technology, comprising a flat plastic body (1) having at least one recess (2) for receiving a voltage surge arrester (3) with two electrodes (13, 16), a U-shaped holder (6) with two legs (11, 14) attached at the plastic body (1), a first leg (11) of said holder (6) pressing against the first electrode (13) of the voltage surge arrester (3) and the second leg (14) resting against the side of the plastic body (1) directed away from said first leg and being extended such that its end projects into the recess (2), a contact member (8) forming the plug contact (7) and the end of which being opposed to the plug contact terminating in the area of the recess and forming tthe bottom of the recess (2), and a melt element (4) disposed between the contact member (8) and the other electrode (16) of the voltage surge arrester (3) and the inner side of the extension of the second leg (14) of the U-shaped holder (6) having a smaller distance to the second electrode (16) of the voltage surge arrester (3) than the inner side of the contact element forming the plug contact (7), characterised by that the extension of the second leg (14) of the U-shaped holder (6) is adapted as a contact spring (15) projecting into the recess (2) for receiving the voltage surge arrester (3), so that said extension, after fusion of the melt element (4), makes contact with the second electrode (16) of the voltage surge arrester (3) for establishing a short-circuit of the voltage surge arrester (3).
  2. A safety plug according to claim 1, characterised by that the contact spring (15) is adapted as a blade spring.
  3. A safety plug according to claim 1 or 2, characterised by that the support point (18) of the contact spring (15) is at a distance to the outer periphery of the voltage surge arrester (3) corresponding approximately to the radius thereof.
  4. A safety plug according to one of claims 1 to 3, comprising several, preferably two parallel rows of offset voltage surge arresters and a holder adapted as a cage, characterised by that the first legs (11) are cut free by cuts (20) extending down into the base (19) of the U-shaped holder (6).
  5. A safety plug according to claim 4, characterised by that the plastic body (1) for each holder (6) comprises a web (9, 10) having an increasing height from the upper edge (21) of the plastic body (1), on said web, during assembly of the safety plug with inserted voltage surge arresters (3) and melt elements (4), the first legs (11) being guided onto the voltage surge arresters (3).
EP93106602A 1992-07-30 1993-04-23 Safety plug for connecting or disconnecting rails for telecommunication or data technology Expired - Lifetime EP0582779B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4225484A DE4225484C1 (en) 1992-07-30 1992-07-30 Protective plug for connecting and isolating strips in telecommunications and data technology
DE4225484 1992-07-30

Publications (2)

Publication Number Publication Date
EP0582779A1 EP0582779A1 (en) 1994-02-16
EP0582779B1 true EP0582779B1 (en) 1996-01-03

Family

ID=6464649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106602A Expired - Lifetime EP0582779B1 (en) 1992-07-30 1993-04-23 Safety plug for connecting or disconnecting rails for telecommunication or data technology

Country Status (16)

Country Link
EP (1) EP0582779B1 (en)
JP (1) JPH06223953A (en)
AT (1) ATE132666T1 (en)
AU (1) AU665692B2 (en)
CZ (1) CZ279214B6 (en)
DE (2) DE4225484C1 (en)
DK (1) DK0582779T3 (en)
EG (1) EG20120A (en)
FI (1) FI107571B (en)
GR (1) GR3018979T3 (en)
IL (1) IL106095A (en)
NO (1) NO306690B1 (en)
PL (1) PL172498B1 (en)
SK (1) SK278460B6 (en)
TR (1) TR27167A (en)
ZA (1) ZA935461B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI0797379T1 (en) * 1996-03-18 2003-04-30 Krone Gmbh Circuit board and process for mounting and soldering of electronic components in accurate positions on the surface of the circuit board
DE19620340C1 (en) * 1996-05-21 1997-10-16 Krone Ag Circuit board for precise placement and soldering of electronic components e.g. for fitting overvoltage protection modules
ATE187286T1 (en) * 1996-03-28 1999-12-15 Siemens Ag PROTECTIVE ASSEMBLY FOR A DISTRIBUTOR IN A TELECOMMUNICATIONS SYSTEM
DE19818477A1 (en) * 1998-04-24 1999-10-28 Quante Ag Overvoltage protection storage rack for setting up telecommunications equipment
DE10162916A1 (en) * 2001-12-20 2003-07-10 Epcos Ag Spring clip, surge arrester with the spring clip and arrangement of a surge arrester
DE102005013696B3 (en) * 2005-03-08 2006-04-06 Rainer Gutjahr Snow clearance installation for roofs has pulley system with continuous cable to pull a clearing body over the roof surface whose wedge shape pushes the snow down off the roof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508845C3 (en) * 1975-02-28 1980-10-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Fuse strip
DE2738851C3 (en) * 1977-08-29 1981-09-24 Siemens AG, 1000 Berlin und 8000 München Fuse strip for holding electrical fuses
DE3507706A1 (en) * 1985-03-05 1986-09-11 Schaltbau GmbH, 8000 München Cassette for overvoltage suppressors for telephonic terminal boxes
US4901188A (en) * 1988-12-30 1990-02-13 Reliance Comm/Tec Corporation Line protector with spring

Also Published As

Publication number Publication date
FI107571B (en) 2001-08-31
SK80293A3 (en) 1994-02-02
TR27167A (en) 1994-11-10
JPH06223953A (en) 1994-08-12
EG20120A (en) 1997-07-31
NO932487D0 (en) 1993-07-07
DK0582779T3 (en) 1996-02-05
CZ279214B6 (en) 1995-01-18
GR3018979T3 (en) 1996-05-31
EP0582779A1 (en) 1994-02-16
PL172498B1 (en) 1997-09-30
DE4225484C1 (en) 1993-12-23
IL106095A0 (en) 1993-10-20
SK278460B6 (en) 1997-06-04
AU665692B2 (en) 1996-01-11
AU4135993A (en) 1994-02-03
NO306690B1 (en) 1999-12-06
ATE132666T1 (en) 1996-01-15
DE59301306D1 (en) 1996-02-15
PL299581A1 (en) 1994-08-22
CZ153993A3 (en) 1994-02-16
FI932796A0 (en) 1993-06-17
ZA935461B (en) 1995-01-30
FI932796A (en) 1994-01-31
NO932487L (en) 1994-01-31
IL106095A (en) 1996-10-31

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