HUE030337T2

HUE030337T2 - Electric plug connector

Info

Publication number: HUE030337T2
Application number: HUE12184977A
Authority: HU
Inventors: Stefan Ring
Original assignee: Bettermann Obo Gmbh & Co Kg
Priority date: 2011-10-11
Filing date: 2012-09-19
Publication date: 2017-05-29
Also published as: ES2576204T3; EP2581992A1; DE202011051596U1; HRP20160700T1; EP2581992B1; SI2581992T1; PL2581992T3; PT2581992T

Description

Villamos csatlakoehkapoes

The: invention relates to an electric plug connector whlchls suitable for use at higher tempo ratures, such as those required for fire protection applications, comprising an eieci ricaI connecting part for holding electrical conductors to he joined together by a damp desum, and a casing which borders the connecting part and meets the tempe cate re requirements.

In numerous applications,, electric piuqeonneefgcs which must withstand certain temperature stresses are required for joining together a lectrice! conductors. These temperature stresses may he those resoling from ppemtion oh an electrical consumer, for example a lamp. In addition, plug connectors of this type are used In order for eieetricai Installations, for example building instelietionSí to meet the fire protection requirements. According to the ire protection requirements, certain eieetricai im;taiiadons such as communication insteilatlohe nvust remain functional, at least for a certain period of time, in the event of a fire. Ceramic terminals, which are often used as modular terminals seated on a mounting rail, meet these requirements. These terminals are terminal blocks having a ceramic housing which surrounds a tubular profile made of a current-conductihg material as en electrical connecting: part, One or two threaded bores are: introduced into this elaetnea! connecting part, with damping screws seated in the bestes, The ends of elects: cai cors doctors to he joined together are damped in the tubular profile by means of clamping: screws,: and are thus field In the eieetricai connecting part by a damp closure.

In these electric plug connectors, Ithe ceramic housing forms the casing which meets the temperature requirements. At the sameitlmfo this casing forms the eieetricai Insulation toward the outside, and when the plug connector is designed as a modular terminai, forms the insulation between adjacent poies,

Electric plug connectors of this type meet the requirements Imposed on fire protection spplicatons,tHö^i^if^%h!e',:eönnectieh: of electrical conductors requires considerable effort, in particular when a plurality of conductor s are to he joined together within e junction box. However, this is quitetypical for connections of communication installations. ;W0: 01/09990 discloses a method for estshiishing a connection ta an electrica! cable, A section of an outer sheath of the cable lis removed, aad th#pÖlyÄai-:«vire# wf the cable are stripped. These wi res are subsequently conductiveiy connected to a plug an connector part/The eohheetlee thus established is introduced into a casting moid and cast as a whole with a plastic material In order to form an Insulating plug housing.. In particular,

She casing of the cabis and the plug housing may be made of a fireproof or flame-retardant material. The plug-in connector part may be accommodated in a ceramic insert, which as a whole Is cast into the plastic material in the casting moid, IF 2Q89/1T8I41 discloses an electric plug connector intended to preyide improved protection from a plugged-in electrical conductor being pulled out. The plug; connector includes a housing body,, and a cover part which doses same and has openings for inserting conductors, A metallic: eonnsobqg piece having a front wall, a base plate, and a rear wall Is Installed in the housing body. Spring terminais which are deflected when a conductor is inserted, thus Clamping the conductor are provided on the front end rear wails. Mo mention is made of the fire safety of the plug connector.

The document EP 2 263 752 Al discloses an electric plug connector according to the preomfeie of Claim i.

Based on this discussed prior art, the object of the invention is therefore to refine on electric plug connector of the ty pe mentioned at the outset in such a way that it opt only withstands the temperatures required for use at higher temperatures, in particular those required for fire protection applications, hut aiso simplifies the effort for establishing en electrical connection between two electrical conductors.

This object is achieved according to the invention by an eiectric plug connector, mentioned at the outset, in which the electrical connecting part Is designed as a spring · loaded terminal, and rests la a plastic housing which is situated with a positive fit in the casing made of a heat··resistant material, the eiectricai connecting part with Its plastic; housing being bordered by the heat-resistant casing in such a way that the electrical connecting part is: captively held in the casing, even if the piastie housing is destroyed or burned up due to the effect of temperature.

In this electric plug connector, the electrical connecting part is designed as a spring -loaded terminai, often also referred to as a piug-lh terminal, The connection of an electrica! conductor to this electrical connecting part thus fakes place without tools, namely, solaiy by inserting the stripped cggd-MPtdr «tâ> This; élehlfiçal çônnectlhs part rests in a plastic housing, which af £&$ ssn:f:· &n«*ypiaffiy also electrically insulates the Spdng-ioaded terminal. A special feature of the claimed plug connector is that the plastic housing which contains tire electrical: con situated with a positive fit in the heat-resistant casing, for example a ceramic casing, the arrangement of the spring-loaded terminal with Its plastic housing in the heat-resistant easing is designed in such a way that the electrica! connecting; part is captively held In the casing, even If the plastic housing surrounding the connecting part is destroyed, or, as is generally the case in tire event of a fire, is burned up after the fire has lasted for a certain period of time, and therefore IS no longer present. Thus, even in the event of a ire, the electrically conductive components remain suffleientiy insulated) so that for multiple plug connectors installed In a junction: box, even in such an event the risk of a short circuit is effectively avoided. Similarly, such a plug connector may also be used when the risk of damage, destruction, or a change in the material characteristics of a plastic housing within the surroundings of the arrangement of the ping connector cannot be ruled out, as is the case, for example, for use in areas with high-temperature surroundings. In such a case, the plastic housing, which sometimes becomes brittle due to the effect of temperature, remains held by the casing, between the electrical connecting part and the heat-resistant casing, and effectively forms the electrical insulator even in the event of such a state change.

For such an electric plug connector, it is particularly advantageous that standard spring-loaded terminais: (plug-in terminais), around which the heat-resistant casing Is mounted, may be used for manufacturing: the claimed plug connector. According to one preferred exemplary embodiment, this takes place by casting over such a spring-loaded terminal with the material provided for forming theheat-resistant casing, for example a ceramic material. It Is understood that at least one conductor receptacle in the housing remains free in the course of this casting process. The same applies for test openings, which are usually present On the rear side, opposite the conductor mounting side. Since spring-loaded terminals Of this type are primarily mass-produced articles having a muitipoie design? they represent an inexpensive starting product from which the above-described plug connectors may be manufactured.

In the above-described concept of the electric plug connector, use is made of the fact that; to maintain the functionality of an electrical installation over the desired; time Pitted in the event of a firey the Insulation does not have to also meet the requirements for contact protection. In this respect, a bias that, is widespread in the field has been disregarded 1rs the development of this electric plug connector. The underlying rationale is that in the everst of a fire, when the junction box and the plastic housing of the electrica! connecting part are no longer present because they have horned up, personnel are not In the vicinity anyway due to the high temperatures prevailing at fhis location.

According to one exempiary embodiment, If Is provided that as part of the easing of the plug connector, a bar is provided on the conductor mounting side of the spring-loaded terminai, the bar extending transversely with respect to the aiigned sequence of the poies and being molded onto the opposite side walls of the casing. In the event that the plastic housing is lost, this bar ensures that the electrical connecting part Is not able to leave the heat-resistant casing. According to a refinement of this exempiary embodiment, the bar has an extension which protrudes into a conductor receptacle In the plastic housing. This extension may extend to the spring terminal associated with this pole. The spring terminal then rests on the bar, and as a result of this measure is held immovably., in a ma nner of speakings In the casing even if the plastic housing is no longer present. Such a design id PuÂle fers* 'f^p|dpolev§prin§»;j^ed:ltrt:n§l; due to the bar, one of the poles is no longer usable fór the elecfrical connectipn. It is understood that multiple bars may also be provided in such a design- If only one such bar is provided, it is possible to arrange it in the center or near the center In relation to the aligned sequence of the poies, A ceramic materia! lh.pe^íddle.r1SéUífahie¢:äs:m:atéri:ai:É?r^mánul¾ctuting the heat·' resistant casing, in pardcular due to Its property of formability by casting. Thus, in such a design a ceramic compound is cast around the typically muitipole spring-loaded terminal: in order to form the heat··resistant casing, and then hardens around the plastic bousing.

If desired, one or more connecting members may he molded onto the heat-resistant casing of the plug connector. This may serve the purpose of connecting individual plug connectors of this type to one another, and/or to fix them in a junction box. As a result of the d:iei<p Ä tlftbeiÄg members as part of the heat-resistant casing^ the mechanical connection of the spring iÉiW!hMf:':wÍth---#he:MÍtteér is maintained, even ina high-tempofature area:,: such as in the event of a: fire. ihdf connecting members that are connected to an additional connecting member, if is assumed that the latter also meets the temperature requirements. For example, the connecting: members which cue molded onto the casing may be extensions having a through opening. A screw, a pin, or o damp, for example, may engage through the through open in grip r establishing the connection, depending on the design of the through opening and of the extension.

The InveniOh }$ described below based on exemplary emho#men%wltb· reference to the: âppis^^i^'li'gyrst^frorn which descriptions further advantages and embodiments of the invention: result The figures show the following:

Figure Id shows a perspective view of; an electric plug connector with a view at the amducior mnunting side,

Figure 2t shows a perspective view of the plug connector in Jhgufe T, on the side opposite from tho conducfer mounting sld%

Figure 3 : shows a longitudinal section of the plug connector in Figures I and 3..,

Figure 4: shows a cross section of the casing of the plug connector in Figures 1 to 3,

Figure 3 : shows o schematic side view of two interconnected plug connectors according to a first refinement,, and

Figure 6 : shows e side view of two additional interconnected plug connectors aecordihg to a farther refinement.

An electric plug connector t includes a heat-resistant ceramic casing 2, The casing 2 is made of a ceramic materiel which is not only heat-resistant, hut also has electrical Insulating properties, A standard sphng-ioaded terminal 3, which in the Illustrated exemplary embodiment has a S'pole design, is hordered in the casing .2. Figure 1 shows the plug connector i with a view of Its conductor mounting side 4. The conductor mounting side 4 is the side at which eiectrtcai conductors are inserted with their stripped end into the plug connector 1 for the eontseti?i;<. mourstmg side 4 is open with respect to the spring-loaded terminai 3 situated in the casing 2, Thus, at least some of the five conductor receptMle^ ^d the springdoaded terminal 3 are accessible, and are not covered by the casing 2. The side wails of the casing 2 protrude beyond the respective termination of the spring-loaded terminal 3 in the direction of the conductor mounting side 4, ,4 bar 5 is situated between these side walls, which project beyond the termination of the spring-loaded terminal 3 on this side. The bar S traverses the conductor mounting side 4of the epringdoaded terminal; 3, and is situated in the area of the middle conductor receptacle In the spring-loaded terminai 3, This middle pole is therefore no longer accessible for electrical contacting. The plug connector i is thus usable as a 4-pole plug connector.

The spring-ioaded: terminai 3isa standard termina!, also referred to as a plug-in terminal, It includes: a termihal tali made of a cohductlve metal, a spring terminal being associated with each pole. For fhis;feason, the tour usable polos of the plug connector 1 arc associated with the same elecÄei conductor, and in prioclpie may therefore also he referred to as connecting points, However, they are still referred to below os poles, astis customary in common usage. à through opening 7 is introduced into the ceramic casing 2, at the rear side £ opposite írom: The conductor mounting side 4. The test;port(s) of the spring-loaded terminal 3 is/are accessible through the through opening 7,

The construction ofThe spring loaded terminal 1 Is apparent from the longitudinal section in Figure 3, The spring-loaded terminal 3 includes as the electrical connecting part a terminal rail 8, which in the illustrated exemplary emhodimenthas a 5-pole design as: described above. For this reason, each poie has a spring terminai 9. The terminal rai! B with its spring terminals 9 is inserted info a plastic housing 10, In the illustrated exemplary embodiment, the plastic housing TO has a two-part; design, and includes a first; housing part XT as a receptacle for the terminal rail S, and a second housing part 12 Which, lh the manner Of a closure body, fixes the terminai rail B, houalhg pert IT/therein, The plastic housing 19 has electrica! insuiating properties, as is the case for standard springdoaded terminals. This spfing-ioaded terminal 3 is Pordered In the ceramic casing 2, The configuration of the Par 5, which crosses the conductor mounting side 4 transversely with respect to the aligned seguence of the poles, is apparent from the longitudinal section in Figure 3. In the illustrated exemplary embodiment, the ceramic casing 2 is a east part which has been cast around the spring-loaded terminal 3-. A casting moid is used, through which the openings in the conductor mounting side 4, which form the Par §, remain. The side walls of the ceramic casing 2 are inclined at a slight angle relative to one another in the direction of the rear side 6, the inclination being used as a draft angle. ït Is dear from the illustration in Figure 3 that the electric plug connector 1 is usable as a 4-pole plug- In terminal .

Figure 4 shows the ceramic casing 2 in an enlarged illustration. It is apparent from this illustration that the Par I Pears an extension F which protrudes into the conductor receptacle in the houeini J§ for tbe:ifpíihgHö^tdilerm'lh.§l »the middle poie. This results In additional positional fixing between the spring-loaded terminai 3 and the ceramic casing 2,

It is clear from the description of the ceramic easing: 2, ln particular the manner lh which If borders the spring-loaded terminal 3, that the spring-loaded; terminal 3 Is held therein with a positive fit, The hit :$ with its extension 'iwitves th® purpos© thatth® tetfrunar rail 8 situated In the plastic housing lots then %\m present with a positive fit witHIn the Chamber formed by the ceromld casing 2 whenthP plastic housing 10 is no longer peasant ïn tho avant of g/fjre, I|iji':%i§sf?pfcte4 that the plastic housing 10 has burned up or melted awaywithin a few ihinutascfhg terminal rali B made of metal, together with its spring terminal« 9, remains. In such a state of the plug connector 1, the electrically conductive terminai rali 8 with its spring terminals § Is still captiveiy accommodated in the ceramic casing 2. This means that even in the event of a fire. In which the electrically insulating plastic housing iO ha« been destroyed, the electrical conductors are still net exposed^ thus effectively avoiding the risk of short-circulfihg<

Since a standard spring loaded terminai 3;;havlpg a terminal rail Bas the electrical connecting part Is used in the plug connecter 1, the connection of electrical conductors; may readily he carried out without tools, lastly, the stripped conductor ends, whether they are cables or life wires, need only bo: Inserted into theîddidy«:Tacepjli#eleg.M::lfe# plug connector 1 and pushed Into the respective spring terminal 9. These stripped act vertically on the inserted conductor end, specifically, in the manner of a barbed hook, thus further increasing the clamping force acting on the particular conductor whenmechanical tensile stress is applied to the conductor.

In the exemplary embodiment described above, the ceramic casing 2 has been produced by means of casting. This production method is appropriate for molding connecting members onto the ceramic casing 2 if desired. Such connecting members may serve the purpose of joining together indwsduel plug connectors. This may take place in the transverse direction and/or also m the longitudinal direction of the piug connectors.

Figure 5 shows., in a first exemplary embodiment, a plug connector 1.1 which in each case Pears a pennedting extension .13, 13.1 on the ceramic casing 2 as a connect mg member at extensions 1.3, 13,1 each have a through opening.M, :14,1, ^respectively* Theconnecting extensions 13, 13,1 are arranged polnt-symmetrically relative to one another with respect to the plug connector 1.1. This means that in the illustrated exemplary embodiment, the connecting extension 13 is molded onto the ceramic, casing 2,1 in alignment with the rear side 5 and extends to the mid -height of the casing 2,1, while the connecting extension 13,1 with its one side is provided in alignment with the conductor mounting side 4, and with regard to the height likewise extends to the middle of the ceramic casing 2.1, In this way, multiple plug connectors 1.1 of thus type may ihelJlned up: In a now, as shown in Figure S< A metal pin 15 is used for fixing the plug connectors .1,:1 to one another, Since this metal pin Is also flre-teshlant^ thé mechanical aliped sequence of the plug connectors 1.1 is maintained, even In the eyeet ef a fire.

Figure 6 shows two further pi up connectors 1.2 that are connected to one another, These plug connectors have a connecting extension 13,2: and 13.3, respectively, which extends over the entire height, A thmagh opening 14,2, 14,3 is likewise introduced in the connecting extensions 13,2,. 13.3,. respectively. Two such plug connectors 1.2 having adjoining transverse sides may be heid together with a connecting clamp 16, as shown in Figure 6« The connecting clamp 16 is made of metal, for which reason this connection is also maintained in the event of a fire.

The same or aiso différant connecting members may hear such a plug connector,, or may hear same only at their ipngitudirp! walis, so that a plomlity of such plug connectors may he joined together. Since in principle,, these types of plug connectors need he accessible only from one side, the available space in a junction Pox may he utilized essentially completely by such interconnected plug connectors,

The invention has beemdascnhei with reference to the figures, based on a plug connector which is usable with four poles, Similarly,, it is understood that spring-loaded terminals having a different number of poles and encased with a ceramic casing are suitable for use at higher temperám res, Such as those required for fire protection applications, Likewise., it is possible to situate multiple or a plurality of standard spring-loaded terminals in a casting mold in order to subsequently accommodate them in a shared ceramic casing. üst of reference numerals !. 1,1, 1,2 Plug connector 2, 24 Ceramic casing 3 Spring-ioacied terminal 4 Conductor mounting sida 5 Bar 6 Rear side ? Through opening 8 Terminal rail 9 Spring terminal: 10 Housing 11 First housing part 13 Second housing part 13, 13,1, 13,2, 13,3 Connecting extension 14, 14,1, 14.2, 14,3 Through opening 15 Meta ! pin 16 Connecting damp F Extension

Claims

1, Electric terminal block, suitable for example firefighterFirewood! the need for higher vacancy rates; and including a core electrical connection part (3) for holding the interconnecting electrical wires to the hub of the hub, and the thermostat core, the connecting part (3) with the cladding (2, 2.1), the ablative part (3) characterized by a spring clamp coupler, characterized in that the electrical connection part (3) is in a plastic housing (¾ with the space where the reptile material plastic housing (KI) is located on the lower edge of the mantle (2, 24), where the electrical connector is engaged (3). ) with the plastic housing (10) take Mrul the heat-resistant mantle (2,2,2) so that the fork connector part (3) is still in the mantle (2, 24): holding it when the plastic housing < : i0) is damaged by heat or is enough,

A coupling clip according to claim 2, characterized in that the electrical connection part (3) is of a multi-pole design, and that the mantle (2, 2.1) forms part of a mantle (2, 2) facing the plurality of poles. 2.1) to opposite side walls (i) Fitting latch (5). 3. A clamp according to claim 2, characterized in that the aperture (3) has access to one of the poles of the pole-shaped electrical connection part (3) and is provided with a protrusion (F) extending into the lead-ins of the housing (10). Connector clip according to claim 3, characterized in that the protrusion (F) is the electrical connection part (3) for this purpose = pdiwrsh0 ^ = 1jÉ ^ ^ í ^ nd0it'-foil gs &

Connector clip according to one of Claims 1 to 4, characterized in that the Molding (2, 2.1) is made of ceramic material.

Connector clip according to claim 3, characterized in that the molding (2, 2.1) is formed by casting a plastic housing (10) comprising a spring clamp (3).

2, 2 - i. according to one of claims 1 to 3! terminal block, characterized in that the clamp (2, 2.1) has four or more connecting edges (13, 1: 3.1) 23-2, 13.3). 8, A? A plug-in terminal according to claim 1, characterized in that a plurality of brackets, 1.2}, are assembled in accordance with §§. , also having a temperature element m, 16) - 9. A coupling terminal according to claim 8, characterized in that it is a connecting element comprising a break (14, 14.1 ;: t4.2, 14.3) (: 13). , 13.1; 13.2, 13.3} yen, and the connecting links (IS, "} of at least two interconnections) (13, 13.1; 13 , 2, 13.3) penetrate (14, 14.3; 14.2, 14.3).