HUT77784A - Device for connecting electronic equipments - Google Patents

Abstract

A multiwire shielded cable (14) for a data network is for example pre-installed in the wall (45) of a building. The end of the cable (14) enters a housing part (66) and is coupled to a Western connector (10) or another connector having a similar design, whatever the connector system that will be later used. When the user-specific equipment is later installed, a modular housing (29) is inserted into the housing part (66). The modular housing (29) has an input tip jack compatible with the connector (10) and another tip jack on the side of the user which may be a jack of the Western type, an IBM data jack or a BNC jack (27). The connector (10) is provided with a metallic shield which directly contacts the shielding of the cable (14) and the metallic shield of the input tip jack, which in turn is electrically connected to the metallic modular housing (29). An easily adaptable data installation system is thus obtained, in which the area from the end of the cable to the user-specific tip jack (27) is very effectively protected against perturbing radiation.

Description

FIELD OF THE INVENTION The present invention relates to a device for connecting electronic devices to a multi-shielded, pre-assembled cable, the end of which may be connected to a multi-pole first plug connector, including a plug adapter having a first plug connector.

It has a multi-pole second plug half matching two halves and a third plug half, whereby the contacts of the second and third plug halves are connected in a predetermined manner by the plug adapter switch plate.

The cable is eg. it is pre-installed in a building wall and the cable ends in a wall switch box. Depending on the data network to be installed, the system-specific data connection sockets must be placed in the box in the wall and electrically connected to the cable. so e.g. such sockets exist for IBM or WESTERN, but you can also use BNC sockets. To simplify assembly, the cable is used to connect the unitized first plug-in half to which a second unitary plug, also standardized in the plug-in adapter, fits. This way, the first plug-in can be installed immediately, no matter what data system you want to use later. Thus, it is only subsequently necessary to insert the plug adapter, the third plug of which is the desired socket type. As easy as it is to install a data system, it is just as easy to migrate from one data system to another. All you need to do is replace the plug adapter. Different sockets (third sockets) may be required eg. for a data system to be used for a telephone system, and for a data system used for a computer system or other specific system intended to be used.

The state of the art

The US AMP company offers AMP-Communications Outiét Wiring SYSTEM for a device of the above type. In this arrangement, the first plug is secured in a mounting housing which is housed in a masonry box (or cable duct). This first plug-in socket is formed as a socket with a plurality of (8) rows of adjacent spring tongues, so-called. They are connected by means of cutting edges to the cable wires. These clips are held together by a block. With these clips, it is possible to connect the cable cores without first having to remove the insulation from the cable cores. The second plug half is formed by a plurality of adjacent guide tracks on the coupling plate. In this case, the end strip is designed as a flat plug.

There is a problem with these known devices. that electrical shielding within the transition range between the cable and the other plug (conductor tracks on the switch plate) is necessarily limited to large volume metal enclosures. This operation requires significant effort to meet the requirements of high performance data networks. However, the shielding quality is limited by the large distance between the housing walls and the spring tongues (guide rails) of the first and second plugs.

EP-A3-0 224 200 discloses a plug-in unit and a socket for a multicore cable, with shielding to dampen the penetrating EMI / RFI radiation and to discharge electrostatic charges on the shield to the ground. The socket is mounted on a switchboard for mounting.

Description of the Invention

It is an object of the present invention to provide an appropriate structure that allows perfect electrical shading. At the same time, we want to simplify the handling of the batteries during assembly. The prices of the components to be installed should be marketable and in line with practice.

SUMMARY OF THE INVENTION The object of the present invention is solved by the fact that the first plug-in half, in a manner known per se, is formed by a plug with a plug-in housing arranged in a plurality of planar, side-by-side directions. , has an axial parallel channel; these insulated opened wire ends are individually plugged in, whereby the contact lamellae which can be folded in transversely to the ducts filter the insulation of the wires lying in series on the one hand and on the outside of the plug housing on the front flat side facing the plug; in addition, in the direction of the plug, a substantial portion of the back of the plug housing is enclosed by a metal shield which partially extends beyond the cable end and is electrically connected thereto to the cable shield; further, the second plug-in means, in a manner known per se, is formed by a plug-in socket which fits in with the plug; a substantial portion of said plug housing is enclosed in a metal shield; the shielding of the housing, when plugged in, is in direct contact with the metal shielding of the plug, in an electrically conductive manner.

Such a design - as this type is marketed by WESTERN ELECTRIC - WESTERN plug. Preferably, the present invention utilizes a plug that is only of a similar design in that its dimensions are modified so that larger diameter cable leads can be connected. The same applies, mutatis mutandis, to the socket.

The advantage of the invention is primarily that the space requirement of the plug is smaller, so that there is more space for the cables at the outlet of the cable, that is, normally in the wall box to be placed there. This makes the whole book more manageable. Above all, the shielding of the transition area from the cable to the second plug (socket) occurs at a short distance from the conductive paths, providing extreme protection against interference.

It is a particular advantage of a preferred embodiment of the invention that the coupling plate, together with the socket and the third socket, is housed in an approximately column-shaped hollow metal module housing, through a back opening through the socket and an opposite front opening. the third plug becomes accessible and the module housing is in direct electrical contact with the metal shield of the plug socket.

In this way, the third plug side will also be shielded, with the module housing only exposed when the desired module is installed and not during the cable installation. so there is also the possibility of using different plug adapters (which are the third plug * · ·· ♦ • · · ::

• · · · ··· »horseshoes) are always assigned to the specific module housing, which optimizes the quality of the shading. so e.g. The IBM data connector, as a third connector, is significantly larger than the BNC connector. Thus, for a single shading house to be aligned with the largest socket pole, it was necessary to have large windows, even if a small socket was eventually used. Through such a window, interfering radiation may penetrate or additional shielding masks may be required. This drawback is overcome by the design of the invention.

In another preferred embodiment of the invention, a plurality of bulge-like protrusions are provided on the inner surface of the module housing, which are resiliently resiliently resiliently disposed on the metal surface of the plug socket.

These protrusions provide more contact points and higher contact pressures, so no fat or oxide layers can adversely affect your perfect contact. Even if more bumpy protrusions are located on the metal portion of the third plug, shielding is provided.

In another preferred embodiment of the present invention, the module housing may be threaded to an approx. a disc-shaped support frame such that the front, aperture side is disposed around the rim, and the rear aperture side is located within the region of the center of the disc; the support frame is a grave base plane. The bracket is designed to be fixed on a wall or cable duct and to surround an opening therein from which the cable exits. The frame serves as a mounting base for one part of the housing that seals the installed plug adapter together with the module housing. The module housing, in which the desired plug adapter is located, is held by the support frame itself; this means that it is retained even if the housing part is not yet installed. Thus, this means that it can be replaced without further ado, without having to change the electrical installation if a different arrangement is desired.

An improvement is that the longitudinal axis of the block-shaped hollow module housing is located at a slight incline relative to the plane of the disk, such that the lower edge of the rear aperture side is located less than the lower edge of the front aperture side. The advantage of this arrangement is that on the one hand the third plug is more easily accessible from the corresponding plug and on the other hand, first of all, the cable connecting to the first plug can exit the wall with a smaller arc. It is recommended that the slope be set between 10 and 20 degrees.

In a further embodiment, at least one first protrusion extending parallel to the longitudinal axis is provided at the lower edge of the rear aperture side of the module housing, and at least one downwardly extending second projection perpendicular to the longitudinal axis at the lower edge of the front aperture. at the end, a forward-facing cam which is parallel to the longitudinal axis is provided. This allows the model housing to be ergonomically advantageously secured to the bracket and removed more easily.

In a further preferred embodiment, the support frame is formed with a contact surface extending from the edge of the wind to about the center of the module housing, and at least one bracket member on the inside edge of the contact surface which can be pushed under the first projection there is at least one opening into which the second projection may extend, whereby the engaging cam engages below the abutment surface with an aperture formed in an elastic deflection manner.

In a further preferred embodiment of the invention, the frame-shaped housing part can be snapped onto the support structure, said housing part having four frame walls extending vertically upwards from the base plane of the frame, which are equal in height,

• · · • · * ·· support frame.

This design provides ample space for the cable and module housing to be inserted, while being aesthetically pleasing and clear.

Another preferred embodiment is provided with a roof section; the roof portion having a roof surface, two side surfaces at opposite side edges, a front surface and a rear surface, wherein a hinge structure is arranged between the lid portion and the frame-shaped housing portion in the region of the rear surface, and the lateral surfaces lies relative to the base plane when the frame walls of the frame-like housing part and the side walls of the cover part collide with each other when leveled. This cover design further increases space in the housing, supporting the inclined position of the module housing and meeting aesthetic requirements.

In this arrangement, the front surface of the roof section has a first cutout open to the edge.

In this way, when the roof part is closed, a plug may be inserted into the third plug and remain there in the inserted position. The cable can exit the housing through the opening.

In an improved embodiment, the second part of the frame-shaped housing portion joining to the front surface of the roof portion has a second facing toward the wind. there is an open cutout, which completes the first cutout with a full cutout.

It is further contemplated that the bracket, mounted on a wall with its base plane, may be secured thereto and enclosed by the snap-in module housing on the base frame and roof section, wherein the third plug is accessible to the congruent fourth plug through the first or second or it becomes.

In a further preferred embodiment, a plurality of module housings are provided in various ways, each having a second plug-in half and a third plug-in half different. This design allows systems to be varied.

The system is configured so that the third plug is either a BNC type, a WESTREN type, or an IBM data socket.

Two WESTERN sockets can be placed on a switching board in a common arrangement with a second plug.

In the same way, two BNC sockets can be placed together with a second plug half on a switch plate. Due to the larger space requirement, such a tandem installation with an IBM data connector is no longer possible.

make up with each other ·· ·:: ·· ·· «..

«I

- 12 Preferably, the support frame is constructed so as to be able to receive two module housings placed at a short distance from each other when the support frame is made of electrically insulating material.

This insulation and the clearance created ensure that no undesirable earth loop is created between the two module housings. Depending on the need, two identical module housings (with two identical third plug connectors) or two different module housings may be used.

For this purpose, a plurality of bracket-like formations and openings are provided, such that one module housing can be positioned centrally, or in two symmetrical lateral positions. This makes the placement option very flexible.

Brief description of the drawings

Figure 1 is a perspective view of the first plug side and the flat side with the contact strips;

Fig. 2 is a top plan view of a flat, congruent second plug side facing the switch plate;

Figure 3 is a view of Figure 1 in the direction of arrow 3; Figure A is a view of Figure 4 in the direction of the arrow 4;

Figure 5 - View of a support frame with the BNC module inserted - 13 ·· β

«« ♦ «*« * ··· · <

* · '* ♦ · housing;

Figure 6 is a sectional view taken along line 6-6 of Figure 5;

Figure 7 is a top plan view of the support frame of Figure 5 with the housing portion disposed and the cover portion removed;

Figure 8 is a sectional view taken along 8-8 planes of Figure 7, with the lid portion indicated by a line.

Best Mode for Carrying Out the Invention

The present invention will now be described in detail with reference to a preferred embodiment. For the sake of better understanding, the various details are presented only in simplified or schematic form. This is particularly true for the examples 1-4. 1 to 6, as the plugs and sockets shown here are commercially available and thus substantially identical thereto.

The first plug shown in Figure 1 is made of a known plug 10 of WESTERN design and encircles the plug of about 10 cm. a block housing 11 having a plurality of channels 12. The disconnected, insulated end 13 of the cable 14 can be inserted into these. The transverse passageways 15 include contact strips 16 which, through their internal cutting edges 17, pierce the wire seals on the one hand and, on the other hand, form the plug contacts 19 in the region of the flat side of the housing 11 (Fig. 3). For the sake of clarity, only 1 of the 16 contact blades is shown in the 1, but standard 8 contact blades are standard.

A portion of the rear area of the plug housing 11 from the insertion direction overlaps the metal shield 21. The end portion of the metal shield 21 is bent to the socket 22 and holds the exposed shield 20 of the overhanging cable 14.

The plug-in connector shown in Figure 2 is a plug-in socket 23 whose housing is substantially enclosed by a metal shield 24. The inwardly curved overlap of the metal shield 24, which is in contact with the metal shield 21 of the plug 10 when inserted, is not shown. Thus, when the plug 10 is inserted into the socket 23, the socket contacts 19 contact the socket contacts 25 inside the socket 23, i.e. the entire conductor from the cable 14 to the contact strips 25 is effectively protected by a metal shield which closely encloses it.

The socket 23 of Fig. 4 is disposed on the switch plate 26; the outline of this is shown in Figure 2 by stroke only. The switch plate 26 has a third plug side e.g. 27 commercially available BNC sockets. The electrical connection is made by the contact strips 25 and by the respective contacts 15 fr ** ** ** ** ** ** · · ·. ϊ. ·

..... * '' · ···· Between the contacts in the third plug side are formed by the appropriate guide tracks in the switch-down panel 26. The switch plate 26 forms the plug adapter 28 with the second plug half (BNC socket 27). The various plug adapters differ only in respect of the third plug.

This plug-in adapter 28 is housed in an approximately block-shaped hollow module housing 29; has a generally U-shaped cross section, with the bottom wall 31, two opposed side walls 32 and two opposite sides

33.34 with a forehead. The front wall 33,34 has openings through which the socket 23 and the BNC socket 27 are accessible. In addition, the edges of the apertures enclose the socket 23 and the portion of the BNC socket 27 extending therethrough so as to prevent irradiation of the interfering fields. The cover 35 is used to top the module housing 29, e.g. it is guided in the grooves 36 of the side walls 32. The topsheet 35 has a plurality of bulge-like protrusions 37 and is embossed such that it is elastically pressed against the metal body 24 of the receptacle 23 and the BNC receptacle 27 by prestressing. Similar protrusions may be formed on the side walls 32. Thereby, it is compulsorily secured that the module housing 29 is electrically connected to the sockets of the plug adapter 28.

For the sake of clarity, in Figure 2, the outline of the module housing 29 is indicated only in bold. Figure A shows a relatively large free space in the module housing 29 under the switch plate 26. This is due to the low installation height of the 27 BNC sockets shown here. However, the internal size of the module housing 29 is sized to accommodate the largest IBM data connector. Although the aperture in the sidewall 34 must be significantly wider for this purpose, fitting is possible by breaking the wall segments along the marked break lines. Given that the module housing 29 is expensive to produce as a metal casting, it is therefore cost-effective to manufacture only one module housing.

As shown in Figure 4, there is a first protrusion 38 projecting rearwardly parallel to the longitudinal axis of the module housing 29 extending nasally from the front wall 33. Figure 4 does not show the other similarly formed projection because it is overlapped by the projection 38 in this view. The front wall 34 passes through a low staircase to the bottom wall 31. The purpose of this design is to place a lifting tool (e.g., a knife tip) here to lift the module housing 29 out of its fixed position (which will be explained later). Located second to the stairs, second downward rabbit 41 across the longitudinal axis • ·

- 17 holes made on the bottom wall 31. At the free end of the second projection 41, the cam 42 is located at a distance from the base wall 31, parallel to the longitudinal axis and directed towards the forehead. Here, too, there is a second projection 41 of the same design but not visible.

Figures 5 and 6 show an approximately disc-shaped support frame 43; a grid has a base plane 44 for positioning the support garden on the wall of one of the cable channels (or the building) so that it overlaps the wall opening 46.

The wall 45 is depicted in Figure 6 for reference purposes, but only in obscured form. 6, the support frame 43 has square, rounded corners. The center portion has an opening 46 which occupies a rather large surface area. The wall 48 extends vertically from the base plane 44 around the opening; as shown in the top view depiction in U-shape. All this serves to reinforce the bracket. In addition, recessed recesses 52 and 53 are provided on opposite sides 49 and 51. The purpose of these will be explained later.

Between the ends of the U-shaped legs of the wall base 48 is the abutment surface 54, which extends approximately from its right edge to the center of the support frame 43. Transversely occupying the support frame almost complete • ·

width. In the example shown here (Figure 6), the abutment surface 54 is inclined at an angle of approximately 12 degrees to the base plane 44. Otherwise, the incline can be set between 10 and 20 degrees. At the inner edge of the abutment surface 54 there is a rib 56 extending perpendicular thereto. These four equally spaced slots 57,58,59,61 are provided; these include the projections 58 of the module housing 29. The sectional view of Figure 6 does not exactly follow the position of the sectional plane of Figure 5, since the opening 57 would not be included in the figure. Due to the aforementioned openings, the slats 56 are provided with a bar-like training. Apertures 62,65,64,65 are formed on the abutment surface 54 near the edges 55; these second protrusions 41 can extend into these and can be hooked under the abutment surface by means of their engaging cams. Given that the bracket 43 is made of plastic, the flange zone protrudes elasticly from the metallic cam 42 when the module housing is engaged and disengaged. Given that the distance between recesses 57-61 and 62-65 is the same, the module housing can be positioned in the middle as well as in the extreme positions. Up to two module housings can be placed in the two extreme positions. The module housing can be switched off (unhooked) by supporting it with a knife tip. The knife tip can be used as a hoist inserted between the staircase 39 and the abutment surface 54.

Figures 7 and 8 show the frame-like housing portion 66; it is covered by this bracket 43. The housing portion 66 has four 67,68,69,71 frame walls of equal height (about 2.5 cm) facing vertically upwards from the base plane. On the opposite sides of the frame walls 67 and 69 there are projections 72,73; the inner edges of these 74.75 are engaged with the coupling grooves 52,53 of Fig. 5, whereby the housing part 66 is fixed in its position on the support frame 43.

Figure 8 is a bar chart showing an additional roof portion 76 of the housing portion 66. The roof portion has a roof surface 77, two opposed, approximately triangular side surfaces 78 and a cylindrical shell residual rear surface 81 coaxial with a pivot axis. Around the pivot axis, the cover portion 76 can be pivoted relative to the housing portion by means of a bearing. For this purpose, two 82.83 stirrups extend from the housing part; These are the 84.85 pins facing each other. They engage the laths of the roof surface 76 and the backside 81, not shown here, located on the corner portions. On the inside of the frame wall 71, a spring bracket 86 is formed which presses against a cam (not shown) on the backside 81 and causes the cover portion to be biased in the closed position.

Figure 8 clearly shows that the module housing 29 is oblique • ·

Due to its position 20, the cable 14 is only moderately curved. In this way, the mechanical stresses exerted by the cable on the plug 10 can be reduced. On the front side 79 of the cover portion 76, there is a cutout 87 open to the edge, through which the BNC socket can be accessed even when the cover portion is closed. If an IBM data socket is used, a further cut-out in the frame wall 68 should be provided. This is preferably done by cutting the wall along the marked break line. The two cutouts complement each other to form a rectangular or oblong oval cut.

Claims (22)

Claims. A device for connecting electronic devices to a multicore shielded, pre-assembled cable, which terminates in connection with a multi-pole first socket, including a plug adapter comprising a second multi-pole second plug congruent to the first plug and a third plug wherein the contacts of the second and third plug halves are electrically connected to each other via a plug plate of the plug adapter in a predetermined manner, characterized in that the first plug half is provided with a plug housing (11) forming a plug (10), the housing comprising a plurality of axially parallel channels (12) arranged in a parallel plane, in the direction of the plug, into which the opened insulated wire ends (13) can be inserted, whereby the channels (12) can be folded transversely next to the touch the lamellae (16) piercing the wire insulation on the one hand and forming the plug contacts (19) on the outside of the plug housing (11) in the downward direction on the front plane (18), whereby a substantial portion of the back panel of the plug housing ), the shield partially extends through the end of the cable 22 and is electrically connected to the shield (20) of the cable (14) directly therein, and in a manner known per se, the matching socket of the plug (10) (23), the housing of which is largely toxically enclosed by a metal shield (24) and is electrically guided by the shield (21) in its plugged-in position. Device according to Claim 1, characterized in that the switching plate (26) is disposed with the plug-in socket (23) and the third plug-in half (27) in an approximately block-shaped, electrically conductive, hollow module housing (29). the socket outlet (23) being accessible from one side opening side and the third socket side (27) facing the front opening side facing it and the module housing (29) in direct electrical contact with the metal shield (24) of the socket outlet (23); ). The device according to claim 2, characterized in that the inner surface of the module housing (29) has a plurality of bulge-like protrusions (37) which reside on the metal shield (24) of the socket (23), elastically deformed. • • »» · · f t t t t t t t t t tf. - 23rd Device according to claim 2, characterized in that further protruding protrusions (37) rest on the metal part of the third coupling half (27). Device according to Claim 2, characterized in that the module housing (29) can be connected to an approximately disc-shaped support frame (43) such that the front opening side is located around the flange (55) and the rear opening side is located around the center of the disc. and the support frame has a base plane (44) of a tomb. Device according to Claim 5, characterized in that the longitudinal axis of the bellows hollow module housing (29) is inclined at a slight angle with respect to the disk plane, such that the lower edge of the rear opening side is smaller from the plane of the front opening side. edge. The structure according to claim 6, wherein the inclination is between 10 and 20 degrees. A structure according to claim 6, characterized in that: 24 comprising at least one first projection (38) projecting rearwardly of the module housing (29) extending parallel to the longitudinal axis and having at least one second projection downwardly extending transversely to the longitudinal axis at the underside of the front opening; a forward-engaging cam (42) parallel to the longitudinal axis. 9. A device according to claim 8, characterized in that the support frame (43) has an abutment surface (54) extending from its edge to about the middle for supporting the module housing (29), and at least one inner edge of the abutment surface (54). a bracket-like member (56) extending beneath the first projection (38) and having at least one opening (62,63,64,65) near the outer edge (55) into which the second projection (41) can enter; wherein the engaging cam (42) below the abutment surface (54) engages the lower, anterior edge of the aperture, which is capable of deflecting elastically. A structure according to claim 5, characterized in that the frame-like housing part (66) is snap-on to the support structure (43), the minor part of the housing part (66) having a frame wall (67) extending vertically from the base plane (.44) of the support frame (43). , 68,69,71) are equipped with and · · · · «· ··· - The support frame (43) is enclosed by the frame walls. 11. A device according to claim 10, characterized by a cover portion (76) having a cover portion (77), a side surface (78) located on two opposed edges, a cover portion (76) and a frame-like housing portion adjacent to a front surface (81). An articulated member (84,85) is formed between the shells (66), the side surfaces of the cover portion (76) being approximately triangular with the cover surface (77) inclined relative to the base plane (44) when the frame walls (66) 67.68, 69.71) and the side surfaces (78.79) of the cover portion (76) are flush with each other when leveled. 12. The structure of claim 11, wherein said rectangular front surface (79) of said lid portion (76) comprises a first recess (87) open to the edge. 13. A device according to claim 12, wherein, in connection with the frame wall (68) of the frame-like housing portion (66), there is a second edge-open cutout on the front surface (79) of the cover portion (76) which is complete with the first cutout (87). can cut out. 14. The process according to any one of claims 12 or 13, wherein: * A structure 26, characterized in that it is mounted on a wall (45) with its base plane (44) on the base frame (43), and the support frame (43) with the module housing (29) fixed thereon, the frame-shaped housing part (66) and the cover part (66). 76) closes when the third plug (27) is accessible through the first or second cut-out (87) or the full cut-out. 15. A device according to claim 2, characterized in that module housings of different equipment can be used, wherein the second plug side (23) is of the same design and the third plug side is of different type. 16. The device of claim 15, wherein the third plug is a BNC socket (27). 17. The device of claim 15, wherein the third plug is a WESTERN socket. 18. The device of claim 15, wherein the third plug is an IBM data plug. 19. The structure of claim 17, wherein: β β 4 4 4 β β β β β β β β β β ♦ * 4 · - 27 because the module housing has two WESTERN sockets. 20. The structure of claim 5, wherein the support frame (43) is configured to receive two spaced apart module housings (29), the support frame (43) being made of an electrically insulating material. Device according to one of Claims 9 and 20, characterized in that there are a plurality of bracket-like elements and apertures, so that the module housing (29) is optionally located in the middle position or in one of the two symmetrically winding positions or lateral position. 22. A method for connecting electronic devices with various plug-in units to a plurality of shielded, pre-assembled cables, wherein the end of the pre-assembled cable (14) is connected locally to a first multi-pole plug, preferably during installation of the cable. a plug adapter of a device to be connected, a plug adapter having a kungru multipole second plug plug complementary to the first plug, and a third plug plug on the other, when the the third plug corresponds to the plug of the device to be connected, wherein the contacts of the second and third plug halves are electrically connected to each other in a predetermined manner by the plug adapter switch plate, wherein the first plug half is a plug (10) with a plunger housing (11) formed by a plurality of adjacent axially extending passageways (12) in the insertion direction, into which openings (13) of opened insulated wire ends can be inserted, whereby contact strips (16) which can be folded transversely into the passageways (12) ) piercing the insulation of the wire at all times and forming on the outside of the plug housing (11) the plug contacts (19) on the front side of the flat side (18) in the plug direction and on the back of the plug housing (11) enclosed by a metal shield (21) partially extending through the end of the cable and electrically connected therewith to the shield (20) of the cable (14), and the second plug half being a plug socket (23) corresponding to the plug (10). ), the housing of which is substantially enclosed by a metal shield (24) which is a plug (10) in its plugged state it is in direct contact with its metal shield (21) in an electrically conductive manner.