EP0141957A2 - Plug for flat electrical cables - Google Patents

Abstract

1. Plug for flat electrical cables with several insulated conductors (32) arranged side by side in one plane in a common cable sheath (31), mainly for use in telecommunication engineering, with one housing (10, 20) possessing a duct (11) to accomodate the cable end (30) said duct (11) originating in a wide initial section (12) intended to locate the cable sheath (31), and tapering towards an end section (13), the inside width of this end section (13) being equal to the cross section of the insulated wires (32) with their conductors (34) - althrough stripped of the cable sheat - still carrying their full insulation (33), and said housing (10, 20) being equipped with penetration-type contacts (41) in the end section of the duct, which contacts are aligned with the still insulated wires (32), so that, when used, they will pierce the insulation (33) of the corresponding wire and penetrate to its conductor (34) with their cutting end (44), said cutting end being located inside the housing, and their other contact ends (42), located outside the housing (10, 20), are mounted in fixed contact points (48) in a standard uniform arrangement relative to each other, which is common to all plugs, and characterized in that the housing consists of a cover (10) accomodating the lead-in duct (11) on one hand, and of an insert (20) which carries the penetration-type contacts (41) and can be plugged into the cover (20) on the other ; that the end of the cover-side lead-in duct is divided into separate (15) holes (14) which accomodate the still insulated wires (32) of the cable individually ; that the cover (10), in alignment with the layout of the insulated conductor (34) in each hole (14), possesses several potential penetration points (49) for the cutting ends (44) of the penetration-type contacts, said penetration points pointing in the direction in which the insert is pushed in ; that the penetration-type contacts (41) consist of blades (41) bent to point in opposite directions in the form of a "Z", so that the legs of this "Z" form the cutting ends (44) on one side and the contact ends (42) on the other, and the blades can in each case be selected (according to the individual lateral offset (59) of the fixed contact positions (38) in the insert (20) with respect to the desired penetration positions (49) in the cover) from a number of blades (41) in which the "Z" angle offset is more or less pronounced ; and that the blades (41) selected can be interchangeably placed into the insert (20) with that leg of the "Z" which forms the contact end while the Z-legs which constitute the cutting end (44) will form a pattern in the insert (20) which corresponds to the type of blades selected - and form one constructional contact assembly unit with the insert (20) with which they can be forced into the selected penetration points (49) in the cover (10).

Description

The invention relates to connectors of the type mentioned in the preamble of claim 1, which make it possible to contact non-stripped wires of an electrical flat cable by means of a so-called penetration technique. All that is required is to remove the common cable sheath that surrounds the wires, while the insulation of the conductors surrounding the individual wires no longer has to be removed, as is otherwise necessary in telecommunications technology for screw, solder-welded or crimped connections of contacts e.g. to connect a plug of a telephone set to the flat cable.

In the plug to be connected in the known penetration technology, a one-piece housing with a channel for receiving the cable end is provided, which has at its end region opposite the channel opening a group of outer grooves running parallel to the channel, in which plate-shaped penetration contacts are inserted, which are located next to one another transversely to the course of the channel lie. In the area of these penetration contacts, the receiving channel for the cable end is on the Cross section of the sheath-free but still tapered the full insulation on their conductors, longitudinal ribs in the channel keep the individual wires in alignment with their dedicated penetration contact in the outer housing groove. Openings are provided in the bottom of the groove, through which the platelet-shaped penetration contacts are driven by the impact of a hammer or the like with their inner cutting ends into the tapered end part of the channel, penetrate the insulation of the associated wires there and meet the conductor located in the insulation. The contact is thus established, the other end of the plate-shaped penetration contact remaining outside the housing forming the contact end which determines the electrical contact of the plug with associated sockets or the like. In this known connector, adjacent contact locations are created, which are permanently assigned to the corresponding adjacent conductors in the wires of the cable end.

Such plugs are characterized by simple assembly because the stripped cable end only has to be inserted into the receiving channel of the housing and pressure has to be exerted on the penetration contacts, but there is the disadvantage that it is not otherwise; Contacting of the conductors in the individual wires adapted to other purposes is possible. The conductors in the cores can neither be connected to the known platelet-shaped penetration contacts in a different order than is possible due to the position of the adjacent cores in the cable end, nor can the conductor of a single core be connected to several different penetration contacts.

In the known connector, the cable end is fixed by driving in a resilient tongue.

The invention has for its object to develop a connector of the type mentioned in the generic term, which allows an easy assignment of the penetration contacting of the cable, an optional assignment of the connection of the wire conductors to the penetrating contacts in a fixed arrangement to each other in the housing. This is achieved according to the invention by the features stated in the characterizing part of claim 1.

By dividing the housing into two parts in the cap and the insert that can be inserted into it, each of these two components can optimally fulfill its intended tasks. The cap is used to fix the cable end and to correctly position the non-stripped wires in separate bores. Using a suitable selection of the Z-shaped knives from a group of Z-cranked knives of different thicknesses, the insert enables a contact set to be produced there, the outstanding Z-legs of which serve as cutting edges and are arranged in a specific pattern, which defines very specific of the available piercing sites for the holes the cap is used when the insert is mounted in the cap. The stake is first

if it is equipped with the selected Z-shaped knives, a knife holder. Then, when installing in the cap, the insert equipped with the knives becomes a cutting tool which, as a structural unit, drives the entire contact set at the desired piercing points of the cap up to the wire conductors. Finally, after assembly, the insert takes on the function of plug formation.

In order to reliably hit the optional puncture sites of the cutting ends of the Z-shaped knives during the assembly process of the insert in the cap, it is recommended that each piercing site be formed by a guide chamber which runs in the direction of insertion of the insert and therefore precisely matches the cutters to the assembly process directs them to the intended place. The contact locations of the Z-legs in the plug, which are exposed to the outside for connection purposes, always assume the same uniform arrangement, irrespective of which knife has been selected from the group of knives with different degrees of Z-shape. The contact locations are expediently arranged in one or more rows in use, which are parallel to the bores in the cap. Usually two rows are used and the insert is formed from an assembly part which can be connected in the cap by latching positions or the like and a core part which remains outside the cap, where the Z-legs which are exposed for contact purposes lie on opposite side faces of the core part and expediently there C-shaped profiled rails are inserted. Starting from a Z-shaped knife inserted at a certain contact point with its one leg for the other leg serving as the cutting end, those piercing places in the cap are available which are arranged in a plane perpendicular to the direction of the bore. The Z-shaped offset of the knives is selected depending on how far the desired puncture site is from the specified contact site in the assembled state.

To accommodate the various Z-shaped crankings of the respectively selected knives, the uniform insert expediently has a sufficiently large recess on the side facing the cap, in which contact points, in the form of abutment surfaces or lateral shoulders, are provided which support the individually selected and inserted knives . This ensures a reliable position of the knives during the piercing work when installing the insert in the cap. The inserting direction of the knives in the cap is expediently carried out in the same direction in which the insert is later inserted into the cap for assembly purposes.

It is particularly important to mechanically intercept the non-stripped wires in the cap also in the intermediate piece which lies between the selected piercing points for the cutting ends of the knives and the fixing point of the cable in the cap. As a result, pulling, pushing and rotating movements on the cable, which can occur when using the plug, cannot continue into the area where the cutting end contacts the wire conductor and impair the electrical connection there. Such Interception points of the cores can be produced by deforming the wall of the bore, for which purpose it is advantageous to cut a plug out of the wall of the borehole and to press it into the borehole in some areas so that it clamps there. This can be done in a blind hole within the cap. These measures are of general importance regardless of the mentioned task and solution of the Z-shaped knives, which is why these measures can also be used in other cases.

• Fig. 1 die Seitenansicht eines für den Anschluß eines Telefonkabels geeigneten Steckers nach der Erfindung in etwa natürlicher Größe,
• Fig. 2 in vielfacher Vergrößerung den Längsschnitt durch den einen Bauteil des Steckers, nämlich eine Kappe, vor Einführung des Kabelendes,
• Fig. 3 in einer zu Fig. 2 entsprechenden Vergrößerung den anderen Teil des Steckers, nämlich einen mit ausgewählten Durchdringungskontakten versehenen Einsatz,
• Fig. 4 eine Schnittansicht durch den zur Aufnahme des Kabelendes dienenden oberen Bereich der Kappe längs der Schnittlinie IV-IV von Fig. 2, wo auch die Schnittführung II-II für den Längsschnitt von Fig. 2 angedeutet ist,
• Fig. 5 in noch stärkerer Vergrößerung einen Horizontalschnitt durch den Einsatz längs der Schnittlinie V-V von Fig. 3,
• Fig. 6 in vielfacher Vergrößerung die Vorderansicht eines beim erfindungsgemäßen Stecker verwendeten Durchdringungskontakts vor dessen Einbau,
• Fig. 7 eine Seitenansicht des in Fig. 6 gezeigten Durchdringungskontakts,
• Fig. 8 einen der Fig. 2 und 3 entsprechenden Längsschnitt durch den Stecker, wo das Kabelende in die Kappe eingeführt und befestigt und dessen Adern durch den eingesteckten Einsatz über die Durchdringungskontakte kontaktiert sind,
• Fig. 9 in einer stärkeren Vergrößerung eine Querschnittansicht durch den montierten Stecker längs der Schnittlinie IX-IX von Fig. 8.

In the drawings, the invention is shown in one embodiment. Show it:

• 1 is a side view of a plug suitable for connecting a telephone cable according to the invention in approximately natural size,
• 2 in a multiple enlargement the longitudinal section through the one component of the plug, namely a cap, before insertion of the cable end,
• 3 in an enlargement corresponding to FIG. 2, the other part of the plug, namely an insert provided with selected penetration contacts,
• 4 shows a sectional view through the upper area of the cap serving to receive the cable end along the section line IV-IV of FIG. 2, where the cut II-II for the longitudinal section of FIG. 2 is also indicated,
• 5 shows an even larger enlargement of a horizontal section through the use along the section line VV of FIG. 3,
• 6 in multiple enlargement the front view of a penetration contact used in the plug according to the invention prior to its installation,
• 7 is a side view of the penetration contact shown in FIG. 6,
• 8 is a longitudinal section corresponding to FIGS. 2 and 3 through the plug, where the cable end is inserted and fastened in the cap and the wires of which are contacted by the inserted insert via the penetration contacts,
• 9 is a cross-sectional view through the assembled plug in a larger magnification along the section line IX-IX of FIG. 8.

The plug consists of a cap lo and a plug-in insert 2 ₀ , the structure of which can best be seen from FIGS. 2 and 3.

The cap 10 comprises a channel 11 for receiving the end 3o of a flat cable which can best be seen from FIG. 8 and which carries a plurality of cores 32 lying next to one another in one plane in a common cable sheath 31. The wires 32 in turn consist of an insulation 33, in which the actual conductor 34, in a telephone a cable consisting of several wires is arranged. The cable end 3o is stripped, so that, as shown in FIG. 8, the wires 32 are exposed but have not yet been removed from their insulation 33. On the cable end 3o, a kink protection sleeve 35 is firmly attached, which has a radial projection 36 for the purpose of fixing the cable end in the cap lo.

• Nachdem, wie bereits qeschildert wurde, das Kabelende 3o mit der Knickschutztülle 35 versehen und abgemantelt worden ist, wird das Kabelende 3o in den Kanal 11 der Kappe lo eingeschoben. Dabei werden die Adern 32 durch das trichterförmige Übergangsstück 13 selbsttätig in die ihnen zugeordneten Bohrungen 14 überführt, die, wie am besten aus Fig. 9 hervorgeht, durch einen Kappenwerkstoff 15 getrennt sind. In dem trichterförmigen Übergangsstück 13 vorgesehene Rippen 16 bilden Leitflächen bei dieser Führung. Die Bohrungen 14 sind ringsum mit geschlossenen Wandungen versehen, was auch gegenüber zur Kappenunterseite hin weisenden Führungskammern 17 gilt, die durch eine Verschlußhaut 18 abgedeckt sind. Dadurch lassen sich die Adern glatt durchführen, ohne im Bereich der mehrfach in Ausrichtung mit den einzelnen Bohrungen 14 angeordneten Führungskammern 17 hängenzubleiben. Die Adernenden 37 treten, wie Fig. 8 verdeutlicht, zu Kontrollzwecken in einer endseitigen Aussparung 19 der Kappe aus, deren Endfläche auch als Anschlag für die Adernenden 37 dienen kann. Von der Kappenunterseite aus zugänglich befindet sich ein Sackloch 38, das jeweils in Ausrichtung mit jeder Bohrung 14 angeordnet ist und durch Verformungen 39, gemäß Fig. 8, der dazwischenliegenden ursprünglichen Wandung 4₀, gemäß Fig. 2, eine Abfangung der einzelnen Adern jenseits des in der erwähnten Ausnehmung 12 sitzenden Vorsprungs 36 der Knickschutztülle 35 in dem Kanal 11 schafft. Von dieser Verformungsstelle 39 an ist die Ader 32 in der Bohrung 14 stillgesetzt; Drehungen, Zugbeanspruchungen und Druckbeanspruchungen wirken sich nicht mehr in einer störenden Bewegung der Ader 32 im Bohrloch 14 aus.

For the reception of the projection 36 of the anti-kink sleeve 35, as can best be seen in FIG. 2, the channel 11 has a recess 12, from which it tapers via a funnel-shaped transition piece 13 into longitudinal bores 14, the number and width of which do not match the profile of the stripped individual cores 32 correspond. The cable end 3o is fixed in the cap lo in the following way:

• After, as has already been described, the cable end 3o has been provided with the anti-kink sleeve 35 and stripped, the cable end 3o is pushed into the channel 11 of the cap lo. The wires 32 are automatically transferred through the funnel-shaped transition piece 13 into the holes 14 assigned to them, which, as best shown in FIG. 9, are separated by a cap material 15. Ribs 16 provided in the funnel-shaped transition piece 13 form guide surfaces in this guide. The bores 14 are provided with closed walls all around, which also applies to guide chambers 17 which point towards the underside of the cap and are covered by a closure skin 18. As a result, the cores can be passed through smoothly without getting stuck in the region of the guide chambers 17 arranged several times in alignment with the individual bores 14. As shown in FIG. 8, the wire ends 37 emerge for control purposes in an end recess 19 of the cap, the end face of which can also serve as a stop for the wire ends 37. Accessible from the underside of the cap is a blind hole 38, which is arranged in alignment with each bore 14 and, by means of deformations 39, according to FIG. 8, the original wall 4 _{0 located} therebetween, according to FIG. 2, a catch of the individual wires beyond creates in the mentioned recess 12 seated projection 36 of the anti-kink sleeve 35 in the channel 11. From this deformation point 39 on, the wire 32 is stopped in the bore 14; Rotations, tensile stresses and compressive stresses no longer have an adverse effect on the movement of the wire 32 in the borehole 14.

These deformations 39 could also be generated in a manner other than that shown, e.g. cuts a profiled plug out of the wall 40, which is pressed in and thereby intercepts the wire 32 in the bore 14. The stopper jams and the wire 32 which it has gripped.

3, 5 and 9, the one-piece insert 2o consists of a widened mounting part 21, which ensures the connection with the cap 10, and a contrasting one _. Core part 22, which determines the electrical contact points. On its side facing the cap 10, the insert 20 has a recess 23, from which penetration contacts in the form of Z-shaped knives 41 with one leg 42 can be inserted vertically. These Z-legs are passed through openings 24 in the bottom of the recess 23 and arrive in the subsequent core part 22 in C-profiled, undercut longitudinal grooves 25. When the knives 41 are fully inserted, the Z-ridges of the individual knives determined by the offset lie at contact points in the recess 23, namely on abutting surfaces 25, which undercut the Z-ridge. Lateral shoulder surfaces 26 are also provided in the recess 23 as further contact points, which, at least in some cases, accompany the initial regions of the other Z-leg 44 adjoining the Z-web 43.

The knives have the basic structure shown in FIGS. 6 and 7. The knife 41 consists of a Z-shaped sheet metal strip with a special outline. The end 63 of the Z-leg 42 to be inserted into the insert 2o is sharpened with regard to the sheet thickness, as shown in FIG. 6, and rounded in the sheet outline, as can be seen from FIG. 7. This makes it easier to thread the Z-knife. In the inserted state, when the Z-legs are positioned in the grooves 27 of the core part 22, the legs form fixed contact locations for the plug when the plug interacts with a corresponding complementary socket. These Z-legs 42 can therefore be understood as the "contact ends" of these knife-like penetration contacts 41. These contact ends 42 are formed uniformly on all knives 41.

• Zur Montage des Steckers wird der mit den Messern 41 bestückte Einsatz 2o als Baueinheit in die Kappe lo eingeführt. Die aus dem Einsatz 2o herausragenden Z-Schenkel bilden miteinander ein Anordnungsmuster, welches von der Auswahl der jeweils verwendeten Messer 41 hinsichtlich des Ausmaßes ihrer Verkröpfung 43 abhängt. Die Schneidkanten 46 dieser Z-Schenkel 44 gelangen dabei zunächst in eine ihr zugeordnete Führungskammer 17, wenn der Einsatz gemäß Fig. 3 im Sinne des dort eingezeichneten Pfeils 5o in die Kappe lo hineinbewegt wird. Die Führungskarnmern 17 bewirken eine genaue Zentrierung und lenken die Schneidkanten 46 an die Verschlußhaut 18 im Boden der Kammer 17, welche durchstoßen wird. Bei der weiteren Einsteckbewegung 5o dringen die Schneidkanten 46 in die ihnen zugeordnete Bohrung 14 und dringen in die Isolierung der dort vorausgehend in der Kappe lo positionierten Ader 32 ein, wo sie mit dem Leiter 34 in einwandfreier elektrischer Verbindung kontaktieren. Welche Führungskammer 17 der verschiedenen Bohrungen 14 dabei führungswirksam wird, hängt ab vom Ausmaß der Verkröpfung 43 des dabei verwendeten Messers 41. Dies richtet sich nach folgenden Gesicntspunkten:
  • Wie bereits oben erwähnt wurde, nehmen die als Kontaktenden fungierenden Z-Schenkel 42 reststehende Kontaktplätze 48 am Kernteil 22 des Steckers ein. Durch begleitende Längsrippen 51 zwischen den Kontaktplätzen 48 erhält der steckbare Kernteil 22 ein definiertes Umrißprofil, des ihn für bestimmte Steckdosen verbindungsfähig macht, die ein entsprechendes Komprementäres Öffnungsprofil aufweisen. Diese Kontaktplätze 48 liegen, wie am besten aus Fig. 5 zu ersehen ist, in zwei Reihen 6₀ nebeneinander, nämlich auf den beiden Längsseiten des erwähnten Kernteils 22 im Einsatz 2₀. Diese beiden Anordnungsebenen der Kontaktplätze 48 liegen parallel zur Verlaufsrichtung der Bohrungen 14, wenn man den Montagezustand des Steckers gemäß Fig. 8 betrachtet. Die Erfindung ermöglicht nun durch Auswahl eines Messers 41 mit geeigneter Verkröpfung 43, daß die Schneidkanten des zugehörigen anderen Z-Schenkels 44 mit dem Leiter einer bestimmten gewünschten Ader 32 des Kabels kontaktieren. Es braucht lediglich dafür gesorgt zu werden, daß, ausgehend von dem Kontaktplatz 48 im Einsatz 2o dieser als Schneidende wirkende Z-Schenkel 44 soweit versetzt ist, daß er bei der vorerwähnten Einsteckbewegung 5o von Fig. 3 die entsprechend seitlich versetzte Führungskammer 17 trifft, die ihn auf die zugehörige Ader 32 in der Bohrung 14 leitet. Im Montagezustand des Steckers gesehen, stehen also einem gegebenen Kontaktplatz 48 im Kernteil 22 eine der Anzahl der Bohrungen 14 entsprechende Schar von Führungskammern für den als Schneidende wirksamen Z-Schenkel 44 zur Verfügung. Die in der Ebene dieses betrachteten Kontaktplatzes 48 angeordneten Führungskammern 17 bieten also wählbare Durchdringungsstellen für das Messer 41. Diese Führungskammern 17 liegen also in einer Ebene, die senkrecht zur Verlaufsrichtung derBohrungen 14 orientiert ist. Die Öffnungen der Führungskammern 17 sind daher als fakultative Durchstoßplätze 49 für den schneidenden Z-Schenkel 42 anzusehen.

All knives 41 also have a correspondingly uniform design with respect to the other Z-leg 44. There should initially be laterally projecting shoulders 45 which lie in correspondingly designed, not shown plant locations in the interior of the recess 23 and compressive stresses at which to be even closer Insert the writing insert assembly of the insert 2o into the cap lo. The Z-legs 44 finally end in double tips 46, which serve as cutting edges, to which are connected sawtooth profiles 47 on both sides of the leg, which are used for anchoring to be described in more detail. The knives 41 which can be used in the invention differ from one another with regard to the strength of the Z-shaped offset, that is to say the offset of the two legs 42, 44 from one another, which can be read from the length of the Z-web 43 lying between them. This results from the objective according to the invention when assembling the plug, for which the following applies:

• To assemble the plug, the insert 2o fitted with the knives 41 is inserted as a structural unit into the cap lo. The Z-legs protruding from the insert 20 form together an arrangement pattern which depends on the selection of the knives 41 used in each case with regard to the extent of their offset 43. The cutting edges 46 of these Z-legs 44 first reach a guide chamber 17 associated with them when the insert according to FIG. 3 is moved into the cap 10 in the sense of the arrow 5o shown there. The guide arms 17 bring about exact centering and guide the cutting edges 46 to the closure skin 18 in the bottom of the chamber 17, which is pierced. During the further insertion movement 5o, the cutting edges 46 penetrate into the bore 14 assigned to them and penetrate into the insulation of the wire 32 previously positioned there in the cap 10, where they make contact with the conductor 34 in perfect electrical connection. Which guide chamber 17 of the different bores 14 becomes effective in terms of guidance depends on the extent of the offset 43 of the knife 41 used here. This depends on the following points:
  • As already mentioned above, the Z-legs 42 acting as contact ends occupy remaining contact locations 48 on the core part 22 of the plug. By accompanying longitudinal ribs 51 between the contact locations 48, the pluggable core part 22 receives a defined outline profile, which makes it connectable for certain sockets that have a corresponding complementary opening profile. These contact locations 48, as can best be seen from FIG. 5, lie side by side in two rows 6 ₀ , namely on the two long sides of the core part 22 mentioned in use 2 ₀ . These two arrangement levels of the contact locations 48 lie parallel to the direction of the bores 14, if one considers the state of assembly of the plug according to FIG. 8. By selecting a knife 41 with a suitable offset 43, the invention now enables the cutting edges of the associated other Z-leg 44 to contact the conductor of a specific desired wire 32 of the cable. It is only necessary to ensure that, starting from the contact location 48 in use 2o, this Z-leg 44, which acts as a cutting end, is offset so far that it meets the corresponding laterally offset guide chamber 17 during the aforementioned insertion movement 5o of FIG passes it to the associated core 32 in the bore 14. Seen in the assembled state of the plug, a set of guide chambers corresponding to the number of bores 14 are available for the given Z contact 44 in the core part 22 for a given contact location 48. The guide chambers 17 arranged in the plane of the contact location 48 under consideration therefore offer selectable penetration points for the knife 41. These guide chambers 17 lie in a plane that is oriented perpendicular to the direction of the bores 14. The openings of the guide chambers 17 are therefore to be regarded as optional piercing points 49 for the cutting Z-leg 42.

The invention thus makes it possible, starting from a uniform cap 10, to develop a plug, the contacts of which can be electrically connected to the conductors of the individual wires 32 in various ways. The invention provides a group of different knives 41 which differ in their cranking, that is to say they have Z-webs 43 of different lengths from one another. Depending on which of the wires a given contact location 48 is to be connected to, the corresponding knife 41 is selected and at this point 23, 24, 27 is inserted into the insert 20 where it is firmly anchored for the connector assembly, but against another Knife in the disassembled state of the plug is interchangeable. As can be seen, the desired contacting of the various wires 32 in the cap 10 is achieved by the selection of the knives; the cutting-effective Z-legs 44 adopt a specific arrangement pattern with respect to one another, as a result of which certain puncture sites 49 in the cap 10 are used. As can be seen from a comparison in FIG. 9, the height of the Z web 43 can vary depending on the extent of the offset.

During the insertion work 5o of the insert 2o into the cap lo, its mounting part 21 passes between deeper drawn side surfaces 52 of the cap lo, where a connection between these two components takes place. To this end, latching positions are used in the present case, which consist of latching projections 53, 54 on the mounting part 21 of the insert and of corresponding locking openings 55, 56 in the side walls 52, which come into engagement with each other during the vertical insertion movement and secure the end position. As seen in Fig. 9, the upper edges of the shoulders 45 come in front of the bottom surface of the cap. In the assembled state, the mounting part 21 of the insert 2 ₀ , according to FIGS. 3 and 8, engages with an attachment 28 in the area behind the recess 12 of the inserted anti-kink sleeve 35, which also contributes to the fixing of the cable end.

The cap 10 has a recessed field 57, in which a label can be received in a protected manner about the manufacturer and the type of plug.

In order to achieve a resilient securing of the plug in use, in the invention an integral locking hook 29 is formed on the insert 20, the free end of which is covered by an end wall 58 of the cap. In the assembled state of the plug, as best seen in FIG. 8, the sawtooth profiles 47 on the cutting Z-leg 44 of the knife engage in the wall areas of the cap in the vicinity of the / selected hole 14.

As has already been mentioned, it is readily possible to make different contacting of the wires 32 of the cable in the connector by means of knives 41 which are bent differently by appropriate selection. When it comes to being able to recognize this externally, the cap 10 can be left, but then an insert is chosen whose core part 22 is profiled differently, for example, has a different positioning or dimensioning of the ribs 51. In this way, an unintentional swapping of the plugs with different contacts can be prevented and yet it becomes one guaranteed construction of the connector from a few components.

In FIG. 5, the dash-dotted lines 6 _{0 show} the parallel arrangement plane of the contact locations 48 in use, which is aligned with the longitudinal profile of the bores 14 in the cap 10, which has already been discussed. Dashed lines in FIG. 8 also indicate the arrangement plane 61 running perpendicular to the bores 14, in which the optional penetration points 49 or guide chambers 17 for the optional entry of a knife 41 inserted at a specific contact location 48 for its cutting-effective Z-leg 44 result . It should also be mentioned that, according to FIG. 3, the insertion direction 53 of the knives 4l into the insert 2o takes place in the same direction. like the aforementioned insertion movement 5o of the insert 2o in the cap lo. As a result, loosening of the knives 41 used during the assembly process of the plug is excluded. In FIG. 9, the offset of the contact location 48 in the insert 20 from the selected penetration location 49 in the cap 10 is designated 59 and corresponds to the length of the Z-web 43 in the associated knife 41.

Reference symbol list:

• lo cap
• 11 channel
• 12 recess
• 13 transition piece
• 14 hole
• 15 cap material
• 16 guide rib
• 17 guide chamber
• 18 closure skin
• 19 recess
• 2o use
• 21 assembly part
• 22 core part
• 23 recess
• 24 opening
• 25 butt surface
• 26 _S side chulterfläche
• 27 groove
• 28 approach
• 29 locking hooks
• 3o cable end
• 31 cable sheath
• 32 core
• 33 isolation of 32
• 34 leaders in 32
• 35 anti-kink sleeve
• 36 radial projection of 35
• 37 wire end
• 38 blind hole
• 39 deformation in 38
• 4o wall at 38
• 41 Z-shaped knife
• 42 Z-legs, carbon file end
• 43 Z-bridge, offset
• 44 Z-leg, cutting end
• 45 shoulder at 44
• 46 double point, cutting edge
• 47 sawtooth profile at 44
• 48 contact point at 22
• 49 piercing point at 17
• 5o arrow of the direction of insertion
• 51 rib
• 52 sidewall of lo
• 53 locking projection
• 54 locking projection
• 55 snap opening
• 56 snap opening
• 57 deepened field in lo
• 58 front wall of lo
• 59 offset between 38, 49
• 6o arrangement level of 48
• 61 arrangement level of 49
• 62 insertion direction from 41 in 2o

Claims (22)

1.) Plugs for flat electrical cables with several cores (32) lying next to one another in one plane in a common cable sheath (31), in particular for telecommunications technology,
Consisting of a housing (lo, 2o) with a channel (11) for receiving the cable end (3o)
the channel - starting from a wide starting part (12) serving to fix the cable jacket - tapers to an end part (13),
whose clear width corresponds to the cross-section of the wires (32), which are jacket-free but still have full insulation (33) on their conductors (34),
and penetration contacts (41) are arranged in the housing (lo, 20), aligned with the non-stripped wires (32) in the channel end part,
which in use each pierce the associated core insulation (33) to the core conductor (34) with their one cutting end (47) located inside the housing, and Cross section of the sheath-free but still tapered the full insulation on their conductors, longitudinal ribs in the channel keep the individual wires in alignment with their dedicated penetration contact in the outer housing groove. Openings are provided in the bottom of the groove, through which the platelet-shaped penetration contacts are driven by the impact of a hammer or the like with their inner cutting ends into the tapered end part of the channel, penetrate the insulation of the associated wires there and meet the conductor located in the insulation. The contact is thus established, the other end of the plate-shaped penetration contact remaining outside the housing forming the contact end which determines the electrical contact of the plug to associated sockets or the like. In this known connector, adjacent contact locations are created, which are permanently assigned to the corresponding adjacent conductors in the wires of the cable end. Such plugs are characterized by simple assembly because the stripped cable end only has to be inserted into the receiving channel of the housing and pressure has to be exerted on the penetration contacts, but there is the disadvantage that it is not otherwise; Contacting of the conductors in the individual wires adapted to other purposes
possible are. The conductors in the cores can neither be connected to the known platelet-shaped penetration contacts in a different order than is possible due to the position of the adjacent cores in the cable end, nor can the conductor of a single core be connected to several different penetration contacts.
a group of knives (41) which are cranked to different degrees in a Z-shape can be selected,
the selected knives (41) can be inserted interchangeably into the insert (2o) in their Z-legs (42) forming the contact ends and with their Z-legs forming the cutting ends (44) an arrangement pattern corresponding to the selection of knives in use (2o) generate, and as a modular contact set with the insert (2o) can be pressed together into the selected piercing sites (49) in the cap (lo). .) Plug according to claim 1, characterized in that the optional piercing points (49) are determined by guide chambers (17) for the cutting ends (44) in the cap (lo) which point in the direction of insertion (5o) of the insert (2o). .) Plug according to claim 1 or 2, characterized in that - in the assembled state of the insert (2o) in the cap (lo) - the contact locations (48) for the knife (41) in one or more rows (6 ₀ ) in use are arranged, which are parallel to the bores (14) receiving the non-stripped wires (32) in the cap (2o). .) Plug according to one or more of claims 1 to 3, characterized in that a set of optional puncture sites (49, 17) in the cap are assigned to a specific contact location (48) in use (2o) in the same arrangement level (61) is. 5.) Plug according to claim 3 or 4, characterized in that the arrangement plane (61) of the optional piercing sites (49, 17) in the cap (lo) is perpendicular to the direction of the bores (14) receiving the non-stripped wires (32) . 6.) Plug according to one or more of claims 1 to 5, characterized in that - before mounting the knife (41) equipped insert (2 ₀ ) in the cap (lo) - the bores (14) with respect to those opening into it Guide chambers (17) have a closed wall (18) which can only be penetrated by the Z-legs (44) of the knives (41) forming the cutting ends during assembly. 7.) Plug according to one or more of claims 1 to 6, characterized in that the insert (2o) on its side facing the cap (lo) in the assembled state has a recess (23) in which the various Z-shaped crankings ( 43) the knife (41) are included in accordance with their selection. 8.) Plug according to one or more of claims 1 to 7, characterized in that the insert (2o), in particular the recess (23) therein, has contact points (25, 26) at which the knives (41) have the various Z-shaped links (43) can be supported. 9.) Plug according to claim 8, characterized in that the contact points consist of the Z-offset (43) in the insertion direction (62) of the knife (41) engaging abutting surfaces (25). lo.) Plug according to claim 8, characterized in that the contact surfaces consist of lateral shoulder surfaces (26) which accompany the initial regions of the Z-legs (44) which follow the offset (43). 11.) Plug according to one or more of claims 1 to lo, characterized in that the Z-shaped knife (41) from the side facing the cap (lo) in the same direction (62) can be inserted into the insert (2o) in which (5o) the insert (2o) can later be inserted into the cap (lo) for assembly purposes. 12.) Plug according to one or more of claims 1 to 11, characterized in that the insert (2o) from a in the cap (lo) engaging mounting part (21) and from one of the outside contact locations (48) for the Z-shaped Knife (41) defining core part (22). 13.) Plug according to claim 12, characterized in that the mounting part (21) by detent positions (53,54,55,56) with the cap (lo) can be connected. 14.) Plug according to claim 12 or 13, characterized in that the core part (22) in the insertion direction (62) of the knife-extending grooves (27) with undercut T-profile for receiving the contact ends forming the Z-leg (42). 15.) Plug according to one or more of claims 1 to 14, characterized in that the non-stripped wires (32) in the cap (lo) are mechanically intercepted in that section (39) which is between the selected piercing site (49, 17) for the cutting end (44) of the knife (41) and the fixing point (12, 36) of the cable sheath (31). 16.) Plug according to claim 15, characterized in that the interception points (39) of the individual wires (32) at the transition point of the receiving channel (11) are arranged in the field having the guide chambers (17). 17.) Plug according to claim 15 or 16, characterized in that the interception point (39) is arranged in a blind hole (38) open towards the insert (2o) in the cap (lo). 18.) Plug according to one or more of claims 15 to 17, characterized in that the interception point is generated by a deformation (39) of the wall (4o) of the bore (14). 19.) Plug according to claim 18, characterized in that the deformation (39) consists of a stopper which can be cut out of the wall (4o) of the borehole, pressed into regions in the borehole (14) and clamped there. 2o.) Plug according to one or more of Claims 1 to 19, characterized in that an anti-kink grommet (35) which surrounds the cable end (3o) and serves to fix the cable jacket (31) in the housing (1o, 2o) and which has a radial projection ( 36), the cap (10) and / or the insert (2o) having a complementary recess (12) receiving the projection.

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