EP0805605B1 - Interconnecting device for transmission networks, especially for telephony and data processing - Google Patents

Abstract

The device incorporates the use of metallic contact tabs (14) connected individually to the terminals (15) and slotted (21) for the insertion of electric wires from passages (23) through rotors (22). Associated with each rotor are two terminals, insulated from each other and each connected to two different tabs. The passages through the rotor extend into convoluted projections (30) cantilevered on opposite sides of its central core (31). The flanks (25) of each terminal themselves constitute the corresponding conductors (16) leading from the tabs to the slots.

Description

The present invention relates generally connection plugs specific to the connection of a any receiver on any transmission network, and more specifically, but not necessarily, exclusively, the case of telephone networks or computers on which the currents conveyed are weak currents occurring at very low voltage.

As we know, such a plug comprises two conjugated connection members, namely, of a hand, a pedestal, which is intended to be subject to a any support, for example a wall, and, on the other hand, a plug, which is suitable for being plugged into this base, and which is intended to equip the receiver cord to connected.

Overall, such a connection device, that it be it a base or a plug, comprises, on the one hand, for cooperation with the conjugate branch, organs contact, and secondly, in a body of insulating material, connection terminals, which, each individually, are connected to these contact members by conductors electric, and which, each individually, are intended to receive one of the electrical wires providing service to all.

The present invention relates more particularly again the case where the connection terminals used are insulation displacement connection terminals, i.e. terminals of connection ensuring by themselves the local elimination of the sheath in insulating material of the electrical wires to be connected when these electrical wires are insulated electrical wires.

This is the case, for example, in the base of connection subject to the French patent which, filed on February 22, 1993 under No. 93 01984, was published under No 2 702 096.

Overall, the insulation displacement connection terminals implemented each comprises at least one connection having a circularly elongated slot around an axis, with, associated coaxially with two organs of connection staggered circularly around such an axis, a barrel, which, rotatably mounted about this axis, is suitable for force an electric wire into the slot of each of the organs connection, this barrel having, for this purpose, in correspondence with the slit of each of the organs of connection, a clean passage to the engagement of such a wire electric.

In practice, in French patent No 93 01984 in question, the two connecting members associated with the same barrel are electrically connected to each other, one of them allowing, as indicated above, the connection of one of the electrical wires serving the whole while the other allows, if desired, the establishment of a any transplanting.

As a result, each of the barrels does not correspond by itself only to a single connection terminal, or, otherwise says that there are as many barrels as connection terminals required.

This provision has given and can still give satisfaction.

But, given the relatively large number of barrels to be used, it leads to realizations relatively bulky and expensive.

The present invention generally has for object a provision to significantly reduce this disadvantage and further leading to other advantages.

More specifically, it relates to an organ connection, base or plug, for transmission network, of the kind comprising, on the one hand, for cooperation with a conjugate connection member, contact members, and, on the other hand, in an insulating body, terminals of connection which are each individually connected to the organs of contact by electrical conductors, and which comprise each at least one connection member having a slot circularly elongated around an axis, with, associated coaxially with two staggered connecting members circularly around such an axis, a barrel which, mounted rotatable around this axis, is suitable for forcing a wire electrical in the slot of each of the connection members, this barrel presenting for this purpose, in correspondence with the slot of each of the connecting members, a clean passage to the engagement of such an electric wire, this connection member being generally characterized in that, for one at least barrels used, the two connection associated with this barrel are isolated from each other and are each respectively connected to two contact members different, so this barrel fits by itself at two different connection terminals.

Preferably, this is the case for each of the barrels.

Thus, the number of barrels to be used is overall found to be halved.

This advantageously results in a significant reduction overall dimensions, and / or greater ease for the installation of connection terminals, as well as a significant reduction in costs.

But, for a base, this also results in a appreciable reduction in the risks of crosstalk.

Indeed, as regards for example the equipment of a telephone network, the two electrical wires of the same pair can advantageously be each respectively connected two connection terminals very close to each other.

It is enough for them to be each respectively engaged in the two passages of the same barrel.

So even as these electrical wires are initially twisted together to minimize the crosstalk, the section by which each must be separated on the other to be connected to a connection terminal a advantageously, according to the invention, having regard to the proximity of the two connection terminals concerned, a reduced length, and the risk of a local recovery of this crosstalk, then commonly called crosstalk, linked to this separation, is itself advantageously reduced by the same amount.

la figure 1 est une vue en perspective d'un organe de branchement suivant l'invention ;

la figure 2 en est une vue en perspective éclatée ;

la figure 3 en est, à échelle supérieure, une vue en coupe longitudinale, suivant la ligne III-III de la figure 1 ;

la figure 4 est, à l'échelle des figures 1 et 2, une autre vue en perspective d'une des parties constitutives du corps en matière isolante que comporte cet organe de branchement, représentée isolément, et vue de bout, suivant la flèche IV de la figure 2 ;

la figure 5 est, à échelle supérieure, une vue partielle en coupe transversale de cette partie, suivant la ligne V-V de la figure 4 ;

la figure 6 est, à l'échelle des figures 1 et 2, une autre vue en perspective de l'autre des parties constitutives de ce corps en matière isolante, représentée isolément, et vue de dessous, suivant la flèche VI de la figure 2 ;

la figure 7 est, à échelle supérieure, une vue partielle en coupe transversale de cette partie, suivant la ligne VII-VII de la figure 6 ;

la figure 8 est une vue en perspective d'un des barillets que comporte également l'organe de branchement suivant l'invention, vu de dessus, suivant la même orientation que celle qui est la sienne sur la figure 2 ;

la figure 9 est une autre vue en perspective de ce barillet, vu de dessous, suivant la flèche IX de la figure 8 ;

la figure 10 en est, à échelle supérieure, une vue en coupe axiale, suivant la ligne X-X de la figure 8 ;

la figure 11 en est une vue en plan, suivant la flèche XI de la figure 10, avec les deux organes de connexion qui lui sont associés ;

la figure 12 est, à échelle différente, une vue en perspective des flans auxquels appartiennent les divers organes de connexion mis en oeuvre dans l'organe de branchement suivant l'invention ;

la figure 13 est une vue en perspective d'une partie de ces flans ;

la figure 14 est une vue en perspective de l'autre partie de ces flans ;

la figure 15 est une vue en perspective d'un autre organe de branchement suivant l'invention ;

la figure 16 en est une vue en perspective éclatée ;

la figure 17 est, à échelle supérieure, une vue en perspective des flans auxquels appartiennent deux des organes de connexion mis en oeuvre dans cet organe de branchement, avec le barillet correspondant.

The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which:

Figure 1 is a perspective view of a connection member according to the invention;

Figure 2 is an exploded perspective view;

Figure 3 is a larger scale, a longitudinal sectional view along the line III-III of Figure 1;

Figure 4 is, on the scale of Figures 1 and 2, another perspective view of one of the constituent parts of the body of insulating material that includes this connection member, shown in isolation, and end view, according to arrow IV of Figure 2;

Figure 5 is, on a larger scale, a partial cross-sectional view of this part, along the line VV of Figure 4;

Figure 6 is, on the scale of Figures 1 and 2, another perspective view of the other of the constituent parts of this body of insulating material, shown in isolation, and viewed from below, according to arrow VI of Figure 2 ;

Figure 7 is, on a larger scale, a partial cross-sectional view of this part, along the line VII-VII of Figure 6;

Figure 8 is a perspective view of one of the barrels that also comprises the branch member according to the invention, seen from above, in the same orientation as that which is hers in Figure 2;

Figure 9 is another perspective view of this barrel, seen from below, according to arrow IX of Figure 8;

Figure 10 is a larger scale, an axial sectional view along the line XX of Figure 8;

Figure 11 is a plan view, along arrow XI of Figure 10, with the two connection members associated with it;

Figure 12 is, on a different scale, a perspective view of the blanks to which belong the various connection members used in the connection member according to the invention;

Figure 13 is a perspective view of part of these blanks;

Figure 14 is a perspective view of the other part of these blanks;

Figure 15 is a perspective view of another branch member according to the invention;

Figure 16 is an exploded perspective view;

Figure 17 is, on a larger scale, a perspective view of the blanks to which belong two of the connection members used in this connection member, with the corresponding barrel.

Figures 1 to 14 relate first of all to the case where the connection member according to the invention is a base of connection 10.

As illustrated in these figures, this base of connection 10 comprises, overall, and in a manner known in itself, in a body 11 made of insulating material, on the one hand, a alveolus 12, which is suitable for receiving a connection plug 13, partially shown in broken lines in the figure 3, and in which intervene, for cooperation with the body of combined connection that constitutes this sheet of connection 13, contact members 14, and, on the other hand, connection terminals 15 which, according to provisions described in more detail later, are each individually connected to the contact members 14 by electrical conductors 16.

This connection base 10 is intended for the equipment of a transmission network using wires electric 18.

In the case, for example, of a telephone network, these electrical wires 18 are usually twisted two by two so as to form pairs 19.

To avoid overloading the drawings, only one of these 19 pairs of electrical wires 18 is shown in the figure 1.

For example, four pairs 19 of electrical wires 18 are provided, with, as shown, a double number of connection terminals 15 and contact members 14, a connection terminal 15 and a contact member 14 by electric wire 18.

In practice, the electrical wires 18 are wires electrical insulated.

Furthermore, in the embodiment shown, the contact members 14 are tongues metallic which extend slightly at an angle in the cell 12.

The foregoing provisions are well known by themselves, and therefore will not be described further in detail here.

In a manner also known per se, the terminals of connection 15 are insulation displacement connection terminals.

More specifically, these are connection terminals of the type of those described in the French patent which, filed on November 9, 1987 under No. 87 15476, was published under No 2 623 024.

These connection terminals 15 each include overall, at least one connection member 20, having a slot 21 circularly elongated around an axis A, with, coaxially associated with two staggered connection members 20 circularly around such an axis A, a barrel 22, which, rotatably mounted around axis A, suitable for forcing a wire electric 18 in the slot 21 of each of the connection 20, this barrel 22 having, for this purpose, in correspondence with the slot 21 of each of the organs of connection 20, a passage 23 suitable for engaging such a wire electric 18.

Axes A are shown in broken lines on Figures 1, 2, 3, 8, 9, 10 and 12, and one of them is identified by its trace in figure 11.

According to the invention, for at least one of the barrels 22 implemented, the two connection members 20 associated with this barrel 22 are isolated from each other and are each respectively connected to two different contact members 14, so that this barrel 22 corresponds by itself to two 15 different connection terminals.

Preferably, and as shown, it is thus for each of the barrels 22 used.

In other words, for eight connection terminals 15, there according to the invention, there are only four barrels 22.

In the embodiment shown, and according to of the provisions described in French patent No 87 15476 mentioned above, the two connection members 20 associated to the same barrel 22 are flat, and they extend transversely to the corresponding axis A.

In practice, these two connection members 20 each belong to two metal blanks 25 respectively separate forms which, by themselves, in one piece, corresponding electrical conductors 16, and, in continuity with these, the contact members 14 concerned.

In practice, too, the two connecting members 20 associated with the same barrel 22 are arranged in positions diametrically opposed to each other around the corresponding axis A.

All the connection members 20 are generally same type.

They include, for the definition of their slot 21, two lips 26, 27, one of which, the most radially radiant lip 26 internal, extends generally circularly, like the slot 21, while the other, the lip 27 radially the most external, has a more massive outline.

Preferably, the outlet of the slot 21 of the connection members 20 flares outward, to facilitate the engagement of an electric wire 18.

The various barrels 22 used are all identical to each other.

They each have a head 28, which is cylindrical, with a circular cross section, and which, in the manner of a screw head, present, diametrically, in surface, a groove 29, to facilitate rotation control from the whole.

This head 28 also has in position eccentric, the two passages 23 each associated respectively to the two connection members 20 concerned.

Like these connection members 20, these passages 23 are arranged in diametrically opposite positions one by relation to each other, and, in the embodiment shown, they extend parallel to the axis A corresponding.

For each of the connection members 20 which are attached to them associated, the barrels 22 comprise a bypass spout 30, which is arranged axially at a level below that of these connection members 20, so as to intervene in below such a connection member 20, and by means of which extends the corresponding passage 23.

Thus, the barrels 22 each have two spouts of bypass 30, which, like the connection members 20 and the passages 23, are arranged in diametrically opposite positions relative to each other.

In practice, these bypass spouts 30 extend, radially, cantilevered, back to back, from a core central 31 which extends axially projecting from the lower surface of the head 28 of the barrels 22.

Bypass 30 are each respectively separated from this head 28 by a slot 32, which crosses the corresponding passage 23 transversely, and at the favor of which intervenes the connection member 20 concerned.

It follows from the above that each of the terminals of connection 15 only comprises, in the embodiment shown, that a connection member 20, and that these terminals 15 are associated in pairs with the barrels 22.

In the embodiment shown, the blanks 25 forming the various connection members 20 are divided into two layers.

For example, and as shown, between these two layers is interposed locally at a place where the electrical conductors 16 group in a bundle for continuously form the contact members 14, a wafer insulating material 34.

This insulating material plate 34, which is relatively thin and flat, a, in the embodiment shown, Figures 2 and 12, a generally outline quadrangular, and in practice rectangular, and, of course, it is entirely contained in the overall outline of the body 11.

It is, in practice, beyond this brochure in insulating material 34 that, to extend obliquely in the socket 12, the contact members 14 are bent relative to to the blanks 25 to which they belong, forming overall a dihedral with these.

According to a variant embodiment not shown, each blank 25 is at least locally isolated, that is, by example, by being covered, in some of its parts, with a insulation varnish, either by being overmolded, in some of its parts, by insulating synthetic material, and blanks 25 are then superimposed or assembled.

For example, and as shown in lines interrupted in Figures 13 and 14, the two layers between which distribute the blanks 25 forming the various connection members 20 are cut from two strips B1, B2 separate.

To facilitate joint handling of the blanks 25 thus from the same band B1, B2, a breakable part of this, common to all the blanks 25 concerned, can, temporarily, subsist, on the side, for example, of organs of contact 14 correspondents, and only be subsequently eliminated, after individualization of the blanks 25.

In the embodiment shown, the body 11 of the connection base 10 according to the invention comprises two parts 11A, 11B between which are arranged, flat, the blanks 25 forming the various connection members 20, namely, on the one hand, a part 11A which receives the blanks 25 and comprises laterally the cell 12, and, on the other hand, a part 11B to the surface of which the connection terminals 15 are accessible to the user.

Part 11A itself comprises, on the one hand, a plate 35, to which part 11B is superimposed, and, flanking laterally this plate 35, along one of the edges thereof, a backsplash 36, which is much greater in height than that of the plate 35, and thanks to which the cell 12 is formed.

In practice, the plate 35 of the part 11A and the part 11B have the same outline, and this outline is rectangular.

The barrels 22 are freely confined to rotation between this plate 35 and this part 11B.

In the embodiment shown, the terminals connection 15, and therefore the barrels 22 are accessible to the user on the side of part 11B.

More specifically, in this embodiment, the part 11B of the body 11 comprises, in number equal to the barrels 22, housings 37, in which the head 28 of these barrels 22 is rotatably mounted, being axially abutted therein by a transverse shoulder 38, and, jointly, the plate 35 of part 11A of this body 11 comprises, in correspondence, housings 39, in which the angularly struggles bypass spouts 30 of barrels 22, being there axially buttressed by a shoulder 40.

For example, and as shown, the housings 37 and the housings 39 extend at the top of a square.

In the embodiment shown, projections 41 are provided axially in diametrically positions opposite to each other, in housing 39, for a limitation of the angular movement, in one direction and in the other, barrels 22.

Furthermore, in this embodiment, one at less of the parts 11A, 11B constituting the body 11, and, in practical, each of these, projecting, on the surface by which it faces the other, ribs 42A, 42B securing, and insulating, the blanks 25 inserted between them.

For part 11B, two of the ribs 42B provide, also, at their ends, wedging, and maintaining, the insulating material plate 34.

In the embodiment shown, the terminals connection 15, and therefore the barrels 22 are accessible to the user on the side of the body 11 opposite the socket 12.

In other words, in this embodiment, the cell 12 opens on the side of the underside of the plate 35 of part 11A of this body 11.

However, as a variant, the connection terminals 15 can just as easily be accessible to the user on the side of the cell 12.

They can also be distributed on one side and the other.

In the embodiment shown, finally, the two parts 11A, 11B constituting the body 11 are secured to one another by simple snap-fastening.

Part 11B includes, projecting, to do this, along that of its edges by which it is in contact with the backsplash 36 of part 11A, two legs elastically deformable 43, which are each shaped as a hook, and which, during assembly, are each respectively engaged in two grooves 44 made for this purpose on this backsplash 36, up to engage with notches 45 provided for this purpose in these grooves 44.

During this assembly, which is done by simple stacking of the part 11A of the body 11, of the blanks 25, with, in the form shown, between the two layers they form, the insulating material plate 34, barrels 22, with a biased presentation of these between the organs of connection 20 associated with them, and part 11B of the body 11, as shown schematically by an arrow F1 in the figure 2.

As a variant, the two constituent parts 11A, 11B of the body 11 can just as well be joined to one another the other by welding, and / or by crimping.

In service, the following connection base 10 the invention is normally subject, before or after its wiring, to a support, a wall for example, not shown.

Anyway, at the wiring, the two wires 18 of the same pair 19 are normally engaged in the two passages 23 of the same barrel 22, such that represented for such a pair 19 in FIG. 1.

As shown by an arrow F2 in the figure 11, this barrel 22 is then rotated around of the corresponding axis A, from which it follows that the two wires electric 18 engaged with him are forced to each engage respectively in the slot 21 of the two connection members 20 concerned, which causes stripping of these electrical wires 18, by a local displacement of their sheath in insulating material.

By the contact thus established with the lips 26, 27 of the slot 21 in which they are engaged, the two wires electric 18 thus engaged with the same barrel 22 each then find each electrically connected to two different electrical conductors 16, and therefore two contact members 14 which, themselves distinct, correspond each respectively at two connection terminals 15 different.

Figures 15 to 17 now relate to the case where the connection member according to the invention is a plug connection, and, for example, connection plug 13 constituting the conjugate connection member associated with the base of connection 10 previous.

Like the connection base 10, this plug connection 13 comprises, overall, and in a manner known in oneself, on the one hand, for cooperation with the connection body conjugate that constitutes the connection base 10, organs contact 14 ', Figure 16, and, on the other hand, in a body 11' in insulating material, connection terminals 15 which are each individually connected to the 14 'contact members by electrical conductors 16 '.

According to arrangements described in more detail subsequently, the contact members 14 'intervene at the favor of a tip 50, which protrudes from the body 11 ', and by which the connection plug 13 is capable of being plugged in in the connection base 10, and, more precisely, in the cell 12 provided for this purpose in this connection base 10.

The connection terminals 15, which, as before, are eight in number, are identical to the connection terminals 15 of connection base 10.

This is why they are here designated by the same reference as these, and it will be the same for all the elements which, from the connection base 10 to the plug branch 13, are identical.

The connection terminals 15 of the connection plug 13 therefore each comprise, as before, a connection 20 having a circularly elongated slot 21 around an axis A, with, associated coaxially with two organs connection 20 staggered circularly around such an axis A, being in practice arranged in diametrically positions opposite to each other, a barrel 22, with passages 23 and bypass spouts 30, which, rotatably mounted around axis A, is suitable for forcing an electric wire 18 'in the slot 21 of each of the two connection members 20 which it concerned.

According to the invention, and as before, for one at least barrels 22 used, and, in practice, for each of these, the two connection members 20 associated to this barrel 22 are isolated from each other and are each respectively connected to two different contact members 14 ′, so that this barrel 22 corresponds by itself to two 15 different connection terminals.

For the eight connection terminals 15 of the plug branch 13, there are, therefore, as before, only four barrels 22.

As before, also, the two organs of connection 20 associated with the same barrel 22 are flat, and they extend transversely to axis A corresponding, each belonging to two respectively metal blanks 25 jointly forming, by themselves, a in one piece, the corresponding electrical conductors 16 '.

As a connection plug 13, the blanks 25 forming the various connection members 20 extend, in the embodiment shown coplanarly in one single layer.

But, as before, they can, alternatively, be arranged in two layers, and / or be superimposed or assembled, at least one of them then being at least locally isolated accordingly.

In the embodiment shown, the organs contact 14 ′ are each formed by a local deformation, generally U-shaped, from the end of the electrical conductor 16 ' corresponding, Figures 16 and 17.

As before, also, the body 11 of the plug connection 13 comprises, in the embodiment shown, two parts 11'A, 11'B between which are arranged, flat, the blanks 25 forming the various organs of connection 20, namely, on the one hand, a part 11'A, which, by a plate 35 ', forms a sole, and to which is attached, laterally, in one piece, the end piece 50, and, on the other hand, a portion 11'B, which forms a cover, and on the surface of which the connection terminals 15 are accessible to the user.

To receive, in the embodiment shown, the blanks 25, the plate 35 'of the part 11'A comprises, in step with respect to the surface through which this part 11'A is faced with part 11'B, housing 54, and, according to provisions of the same type as the previous, the barrels 22 are freely confined in rotation between this plate 35 'and the part 11'B.

As before, the housings 37 'provided for this effect in tray 35 'of part 11'A to receive the barrels 22 and those 39 'provided correspondingly in the part 11'B extend to the top of a square.

The end piece 50 internally forms a housing 55 in which engage the electrical conductors 16 ', and which, at right of the contact members 14 'carried by them, opens outside by slots 56, at the rate of a slot 56 by contact member 14 ', to make these members accessible contact 14 'to the contact members 14 of the contact member conjugate connection that constitutes the connection base 10.

In the embodiment shown, the slots 56 open on the side of the body 11 on which the part extends 11'B of it.

In other words, in the embodiment shown, the connection terminals 15 of the plug connection 13 are accessible to the user from the side of this body 11 on which the contact members 14 'are themselves accessible to the contact members 14 of the conjugate connection that constitutes the connection base 10.

But, as before, these connection terminals 15 can be accessible to the user on the opposite side of the body 11, or be distributed on one side and the other of it.

As before, finally, the two parts 11'A, 11'B constitutive of the body 11 ′ can be secured one to the other by simple snap-fastening, and / or by welding, and, by example, by ultrasonic welding, and / or crimping.

In the embodiment shown, the housing 55 formed by the tip is opened by a notch 58 on the side slots 56, and, for its closure, the part 11'B carries, in correspondence, projecting, awning 59.

Of course, the present invention is not limited to the embodiments described and shown, but includes any variant.

In particular, it can be provided, if desired, on a connection member according to the invention, any terminal additional connection specific to a connection of this earthing device, and it can be for example an insulation displacement connection terminal of the type described and shown or a simple screw connection terminal classic.

In the case where it is a connection terminal insulation displacement, it may not be associated with the corresponding barrel only one connecting member.

Furthermore, the electrical conductors involved between the connection members and the contact members can, if desired, be used to locally create elements of compensation, and, in particular, elements capacitive, likely to reduce crosstalk.

Their journey is therefore not necessarily that shown.

In addition, if desired, the barrels used may be provided with markers to identify them.

For example, each of them can be colored with two different colors, for a total of eight colors corresponding to the codes in force on the subject.

On the other hand, for a socket with only four contacts, the file can for example have only two barrels, according to the invention, at the rate of a barrel for two contacts, but the base may as a corollary include in a conventional manner, a contact barrel, if desired, to allow transplanting.

Finally, whether it's a base or a plug, the branch member according to the invention can, if desired, be at least partially metallized, in order to respond, by for example, shielding requirements.

Claims (12)

1. A connection unit for transmission networks of the kind comprising, on the one hand, contact members (14, 14') adapted to cooperate with a conjugate connection unit, and, on the other hand, connection terminals (15) in an insulative material body (11, 11') which are each individually connected to said contact members (14, 14') by electrical conductors (16, 16'), and which each comprise at least one connection member (20) defining a circumferentially elongate slot (21) around an axis (A), with, coaxially associated with two connection members (20) circumferentially staggered around such an axis (A), a barrel (22) which, rotatably mounted about that axis (A), is adapted to drive an electrical wire (18, 18') into the slot (21) of each of the connection members (20), said barrel (22) having, for that purpose, a passage (23) in register with the slot (21) of each of the connection members (20) and adapted for the engagement of such an electric wire (18), characterized in that, for at least one of the barrels (22) implemented, the two connection members (20) associated with that barrel (22) are insulated from each other and are each respectively connected to two different contact members (14, 14'), in order for that barrel (22) to correspond per se to two different connection terminals (15).
2. The connection unit claimed in claim 1, characterized in that the two connection members (20) associated with the barrel (22) are flat, and extend transversely relative to the corresponding axis (A), and, for each of them, the barrel (22) comprises a deflector (30), which is axially disposed at a lower level than that of the connection members (20), so as to operate beneath such a connection member (20), and by means of which the corresponding passage (23) is extended.
3. The connection unit claimed in claim 2, characterized in that the deflectors (30) of the barrel (22) extend cantilever-fashion from a central core (31) which projects axially from the bottom surface of the head (28) of the barrel (22).
4. The connection unit claimed in any one of claims 2 to 3, characterized in that the two connection members (20) associated with the barrel (22) are disposed in positions diametrically opposite each other, and the same applies for the two passages (23) of the barrel (22) and for its two deflectors (30).
5. The connection unit claimed in any one of claims 1 to 4, characterized in that the two connection members (20) associated with the barrel (22) are each respectively defined in two different blanks (25) which form, per se, the corresponding electrical conductors (16, 16').
6. The connection unit claimed in claim 5, characterized in that the blanks (25) in which the connection members (20) associated with the barrel (22) are defined, form, also per se, the contact members (14, 14') concerned.
7. The connection unit claimed in any one of claims 1 to 6, characterized in that, for each of the barrels (22) implemented, the two connection members (20) are insulated from each other and are each respectively connected to two different contact members (14, 14').
8. The connection unit claimed in any one of claims 5 to 7, characterized in that the body (11, 11') comprises two parts (11A, 11'A - 11B, 11'B) attached together, between which said blanks (25) defining the connection members (20) are disposed flatwise, i.e. one part (11A, 11'A), which receives the blanks (25), and one part (11B, 11'B) at the surface of which the connection terminals (15) are accessible to the user.
9. The connection unit claimed in claim 8, characterized that in at least one of the component parts (11A, 11'A - 11 B, 11'B) of the body (11, 11') has ribs (42A, 42B) projecting from the surface by which it faces the other one, said ribs serving to fix said blanks (25) inserted between them.
10. The connection unit claimed in claim 8, characterized in that, to receive the blanks (25), at least one of said component parts (11A, 11'A - 11B, 11'B) of the body (11, 11') comprises recesses (54) set back relative to the surface by which it faces the other one.
11. The connection unit claimed in any one of claims 1 to 10, characterized in that, said connection unit defining a connection socket (10), the contact members (14) are operatively disposed in a receptacle (12) adapted to receive a connection plug (13).
12. The connection unit claimed in any one of claims 1 to 11, characterized in that, said connection unit defining a connection plug (13), the contact members (14') operate by means of an end piece (50) projecting from its body (11'), and by which that connection plug (13) is adapted to be plugged into a connection socket (10).

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