HK1188041B - Coupling for a power track - Google Patents

Description

Coupler for bus bar

Technical Field

The invention relates to a coupling for busbars, in particular made of metal and having a substantially U-shaped cross section, wherein carrier rails made of insulating material are provided on parallel side walls, which define laterally accommodating channels, which carrier rails each carry a plurality of uninsulated, exposed electrical conductors which are insulated from one another, are arranged parallel to one another in the longitudinal direction and face one another and are accessible from the accommodating channels, wherein preferably also on the base of the busbars there are provided protective conductors which are also accessible from the accommodating channels, wherein the coupling is configured substantially symmetrically with respect to the central cross section and has contacts for contacting the conductors of the busbars and has mechanical guide sections and stop sections, by means of which the coupling can be inserted into the end sides of the busbars with a limited stroke.

Background

Such a bus is known, for example, from fig. 3 of DE OS 2250738. Such busbars are laid, for example, coaxially with one another on the respective faces, and corresponding couplings are known from the prior art for mechanically and electrically connecting such busbars to one another. Conventional couplers are provided with relatively cumbersome resilient contacts which, in addition, in cooperation with the insulating material part of the housing part surrounding the contacts, can lead to wear of the plastic part, thereby limiting the lifetime.

Disclosure of Invention

Based on this prior art, the object of the invention is to provide a coupling which can be produced cost-effectively and is easy to install and which also reduces wear in the region of the spring contacts.

In order to achieve this object, the invention proposes that the contacts are each L-shaped contact strips which are arranged in the housing part of the coupling so as to be elastically displaceable transversely to the longitudinal axis of the housing, which contact strips have a contact region on a first leg of the L-shape, which laterally project beyond the two ends of a central housing stop wall, which forms or is formed on a central cross section, and the contact strips rest indirectly with the edge edges of the second leg with the interposition of a planar strip against the insulating material wall of the housing, wherein a slightly V-shaped bent spring element is formed on the strip of spring plate, the spring element having a central part and projecting perpendicularly to the strip, the end of the leg of the spring element resting elastically against the outer surface of the second leg of the contact strip, which outer surface is opposite the projecting contact region of the first leg.

This design allows a wear-reducing arrangement of the contacts with a simple design, since the edge of the second leg of the L-shaped contact strip does not rest directly on the insulating material wall of the housing, but rather with a flat web in between, which is part of a spring plate that, in addition to the web, has a profiled V-shaped spring element that acts on the first leg of the L-shaped contact strip and provides a sufficient contact pressure. The design associated therewith can be realized in a simple and cost-effective manner, since the main components are basically formed only by the L-shaped contact strips and the bent strips.

In order to achieve a cost-effective design of the coupling, it is also proposed that the coupling has a housing of insulating material with a first, substantially U-shaped base body and a second base body which complements the base body as a closed part, wherein the first base body carries two first pairs of L-shaped contact webs separated from one another by insulating webs together with webs of elastic sheet, wherein a first intermediate wall of insulating material is provided, and the second base body carries two second pairs of L-shaped contact webs separated from one another by insulating webs together with webs of elastic sheet, wherein the two base bodies are latched to one another in a given installation position.

According to this structure, the coupler is constituted by simple single parts which enable a quick and easy assembly of the coupler.

Conventional busbar systems usually work with a system of three phase conductors, one neutral conductor and one protective conductor, which have to be contacted with the connecting piece, in the rail. The described coupling is applicable to this design. The new busbar, which is equipped not only with three phase conductors and one neutral conductor in the busbar, but also with two other conductors suitable for conducting current, enables a corresponding design of the coupling in a simple manner, if only this new busbar is used.

The invention provides for this purpose that two third pairs of contact strips and a second intermediate wall made of insulating material are arranged between the first and second pairs of contact strips, so that the third pairs of contact strips are arranged insulated from one another and insulated from the first and second pairs, wherein the third pairs of contact strips also each form two elastic contact regions projecting beyond the housing side walls.

According to this design, only a second intermediate wall made of insulating material and two third pairs of contact strips need to be additionally provided. The coupling can then be applied in this way to the new bus bar.

In order to be able to form the protective conductor contact on the coupling in a simple manner, it is provided that a protective conductor contact with two projecting, resilient contact tongues is fastened to the end face of the insulating material housing.

It is also an object of the invention to provide a modular system with such a coupling, which makes it possible to produce as many busbar arrangements as possible, such as feed elements, corner fittings, cross braces, etc., with a small number of individual components.

In order to provide such a solution for a coupling according to the invention (which is used for busbars, in particular made of metal, having a substantially U-shaped cross section, wherein carrier rails made of insulating material are arranged on parallel side walls which, on the sides, define receiving channels, which carrier rails each carry a plurality of uninsulated, exposed electrical conductors which are insulated from one another, are arranged parallel to one another in the longitudinal direction and face one another and are accessible from the receiving channels, wherein preferably also protective conductors which are also accessible from the receiving channels are arranged on the base of the busbars, wherein the coupling is designed substantially symmetrically with respect to the central cross section and has contacts for contacting the conductors of the busbars and has mechanical guide sections and stop sections, by means of which the coupling can be inserted with limited travel into the end sides of the busbars), the region of the coupling on the first side of the central cross section serves as a bus bar connector, while the region on the second side of the central surface forms a feed element, in that a suitably configured insulating element can be inserted or plugged onto the feed element, which insulating element carries electrical conductors made of steel plates on guide rails extending parallel to the plug direction of the coupling, the ends of the electrical conductors in the insulating element making contact with the contacts of the coupling, the free ends of which project from the insulating element, preferably pointing in the same direction away from the plates connected to the insulating element or plugged onto the insulating element, so that they enclose an acute angle with the plates, which plates form a mounting surface with cable entries, wherein the free ends each have a contact piece which is formed by a resilient plug contact with at least one plug region or preferably with two separate resilient plug regions, the free ends projecting from the insulating part, together with the elastic plug contacts, are surrounded by channel-like insulating parts which are fastened, in particular latched, to the insulating part and which have plug openings for the electrical conductors on the end face in the region of each elastic plug contact.

The design itself is considered inventive, according to which the range of applications of the coupling is significantly extended. Such a coupling has an outer partition wall in the middle cross section, to which the coupling can only be moved, for example into a busbar, and on the one hand can have corresponding plug-in areas with contacts or the like on both sides of the partition wall.

In order to also be able to use such a coupling as a feed element or also as a connector, the end region of the coupling which is not intended for insertion into the busbar is matched to an appropriately designed insulating element which is inserted in a positionally correct manner onto the end region of the coupling. The insulating element thus has a configuration corresponding to the coupling on the end region. The insulating element has a plurality of guide tracks for the electrical conductors. Electrical conductors made of sheet steel, for example punched bent sections, are inserted into these guide rails, so that these inserted ends come into contact with corresponding contacts of the coupling. The free ends of the electrical conductors protrude through the insulation. A plate is connected to the insulating element, which plate forms the mounting surface of the insulating element or of the coupling element, or is located on this mounting surface, in practice by means of a plane. The plate is connected, e.g. plugged, or otherwise connected to the insulating member. Additionally, the free ends of the contacts projecting from the insulating element form an angle with the mounting surface formed by the plate, for example in such a way that they enclose an acute angle of approximately 30 ° with the plate. Furthermore, contact pieces in the form of sockets are provided at the ends of the contacts, which contact pieces are formed by elastic plug contacts, wherein each elastic plug contact preferably has a separate elastic plug region for two connection conductors. In general, the projecting ends of the contacts, including the spring plug contacts, are surrounded by channel-like insulating parts which electrically insulate and mechanically stabilize the ends, wherein the channel-like insulating parts can be fastened, for example, latched to an insulating part. This design not only enables a simple modular construction of the power supply section thus formed, but also, by virtue of the arrangement and orientation of the elastic plug contacts, the insertion of the respective conductor cores into the elastic plug contacts by the installer is considerably facilitated and a contact in accordance with the regulations is achieved. The double contact is particularly advantageous because a plurality of connection conductors can be connected, in particular in the case of a connection, i.e. when two cores have to be connected to each spring plug contact. By means of the angled design, it is obviously convenient to guide the corresponding cable conductor to the elastic plug contact. In general, the number of corresponding electrical conductors together with the spring plug contacts should be equal to the number of required conductors of the associated bus bar. Thus, for example, for a busbar with three phase connections, a neutral conductor connection and a protective conductor connection, at least five such electrical conductors are required, together with the contact elements. If the busbar has two further conductors for conducting current, the number of conductors and contact pieces is increased by two, as is also provided according to the invention. Furthermore, for symmetry reasons, the protective conductor contacts can be arranged doubly, so that they can be arranged correspondingly according to the application.

The insulation can in principle be used for all applications, but if the guard conductor joint is arranged asymmetrically, i.e. eccentrically, in the base of the rail, an insulation is provided which is suitable for the design of the guard conductor arranged on the left side of the base, and an alternative insulation is provided for the design of the guard conductor arranged eccentrically on the right side of the busbar base. All other components are the same for all embodiments.

It can additionally be provided that the channel-like insulating part is additionally or alternatively fixed, in particular in the latching plate.

The channel-like insulating part can be snapped or latched on the plate, for example.

For example, in the case of a top cover outlet for connecting cables, in order to be able to arrange the connection region in a covering manner and to be able to guide the cables to the supply contacts, etc., it is provided that the plate has an opening for the cables as a guide in the region of the channel-like insulation facing away from the insulation part.

During installation, the panel is installed through the cable outlet with the opening so that the core wires projecting from the cables can then be inserted into and connected to the respective elastic plug contacts.

This design can be used for the feed element in which only the core wires of the connecting cable are inserted into the elastic plug contacts, so that the entire unit is inserted into the end of the busbar.

Alternatively or additionally, however, it is also possible for a plurality of couplings to be provided with an insulating element, electrical conductors, elastic plug contacts and an insulating part, which are arranged opposite one another, facing one another in an L-shape, facing one another in a T-shape, facing one another in a star-shape, or on or fastened to a plate of corresponding linear, L-shape, T-shape or star-shape design, wherein these plates have openings as cable inserts in the middle or in the region of the corners.

In this arrangement, a corresponding number of corresponding components are provided, wherein only the plate is designed differently, on which the components are partially mounted, or which is connected to the insulation, wherein the plate can be designed in an L-shaped, T-shaped or star-shaped manner depending on the application.

The invention finally provides that a housing cover is provided, which can be positioned by one or more of the insulating elements, together with the electrical conductors, the spring plug contacts, the insulating part and the plate, using the openings and can be fastened to the part covered by the insulating part.

With such a housing cover, the entire installation unit formed by the insulator contacts and the plate can be covered, so that an aesthetically pleasing, touch-safe arrangement is achieved. In a corresponding L-shaped, T-shaped or star-shaped configuration, the housing cover is configured in this shape and can be placed on the mounting unit and can be connected to the lower part.

Drawings

Embodiments of the invention are illustrated in the drawings and will be described in detail below. Wherein:

fig. 1 shows the coupling of the invention viewed from obliquely above;

fig. 2 shows the busbar adapted thereto, viewed in cross section;

FIG. 3 is an exploded view of the coupler;

fig. 4 shows a detail of fig. 3 on an enlarged scale;

FIG. 5 is an exploded view of this detail;

FIG. 6 is a side view of the coupler;

FIG. 7 is a view as seen in the section A-A of FIG. 6;

FIG. 8 is a top view of a detail of the coupler;

FIG. 9 is a view as viewed in the section B-B of FIG. 8;

fig. 10 shows the coupler viewed from the end side;

FIG. 11 shows an oblique view of a uncapped coupler supplemented with a feed;

FIG. 12 shows the same view with the top cover;

FIG. 13 is an exploded view of a detail according to FIG. 11;

FIG. 14 is an oblique view of the structure in an installed position;

FIG. 15 shows a variation;

FIG. 16 shows a variation without the top cover housing;

FIG. 17 is a view similar to that of FIG. 16 of another variation;

FIG. 18 is a view similar to that of FIG. 16, but of another variant;

FIG. 19 is a view similar to that of FIG. 16, but of another variant;

fig. 20 shows a variant with a top housing.

Detailed Description

A coupling 1 for a busbar 2 made of metal is shown in the drawing. A cross-sectional view of the busbar 2 is shown in fig. 2. Accordingly, the busbar 2 has a substantially U-shaped cross section. On the side walls of the busbar 2 delimiting the receiving channel 3, carrier rails 4 of insulating material are provided, which each carry a plurality of uninsulated, exposed first electrical conductors 5, 6, 7, 8, which are insulated from one another, are arranged parallel to one another in the longitudinal direction, face one another, and are accessible from the receiving channel 3, three of which are phase conductors and one is a neutral conductor. Additionally, a protective conductor 9 is provided on the base of the busbar 2, which is also accessible from the receiving channel 3. A further protective conductor 10 can additionally be provided on one leg of the busbar 2. Furthermore, between each conductor pair 5, 6 or 7, 8, a fifth conductor 11 and a sixth conductor 12 are arranged, which are insulated from the remaining conductors of the conductor pair. These conductors can also be reached through the receiving channel 3. The fifth and sixth conductors 11, 12 may be used as control conductors for electrical or electronic control or may be additional supply conductors for other electrical loads.

In such a busbar 2, a corresponding coupling 1 with an end delimited by a partition wall can be inserted at the end side.

The coupling 1 is constructed symmetrically with respect to the middle cross section 13 formed by the partition wall. It has contacts 14, 15, 16, 17, 18, 19 for contacting the conductors 5-8 and 11, 12 of the busbar 2. Furthermore, the coupling 1 has mechanical guide portions 20, 21 and a guide insulation pin 22, so that the coupling 1 can be inserted into the end side of the busbar 2 with limited travel. The partition wall serves here as a stroke limitation. The insulating pins 22 are inserted into corresponding cavities of the busbar 2, which are formed between the side walls of the busbar 2 and the carrier rail 4 made of insulating material.

The contacts 14-19 are each arranged in the housing part of the coupling 1 and can be moved resiliently transversely to the longitudinal axis of the housing, i.e. substantially parallel to the partition wall. The contacts 14, 15, 16, 17 are L-shaped contact strips 23 which, in a given installation position, as shown, for example, in fig. 1, have contact regions 24 on a first leg of the L which project laterally beyond the two ends of a central housing stop wall (partition wall) which forms the central cross section 13 and which rest indirectly with an edge 26 of a second leg 27 with a planar web 28 in the middle against an insulating material wall of the housing of the coupling 1.

A slightly V-shaped bent spring element 29, which has a central section 30 and projects perpendicularly to the web 28, is formed on the planar web 28 formed by the spring plate. The leg end of the spring element 29 bears resiliently against the outer surface of the second leg 27 of the L-shaped contact strip 23, which outer surface is opposite the projecting contact region 24 of the first leg 25. This is achieved in that the edge 26 does not rest directly on the plastic part, but on the planar web 28, so that movement-induced wear between the L-shaped contact strip 23 and the plastic part is avoided.

As can be seen in particular from fig. 3, the coupling 1 has a housing of insulating material with a first, substantially U-shaped base body 31 and a second base body 32 which complements the latter as a closed part. The first base 31 carries two first pairs of L-shaped contact strips 23 separated from each other by insulating webs together with the strip 28. They form the contacts 14, 15. A first intermediate wall 33 of insulating material is then provided. The second base 32 can carry two second pairs of L-shaped contact strips 23 separated from each other by insulating webs, together with the strips 28, which correspond to the contacts 16, 17. The two base bodies 31, 32 are connected to one another in a snap-fit manner in a predetermined installation position. In this embodiment, between the first and second pairs of contact strips 23 forming the contacts 14, 15 or 16, 17, there are provided two third pairs of contact strips which form the contacts 18, 19 and a second intermediate wall 34 of insulating material. These contact webs are thereby also electrically insulated from the other contacts 14, 15 or 16, 17 and are also insulated from one another by the corresponding webs of the intermediate walls 33 and/or 34. As shown in fig. 3, the third pair of contact strips forming the contacts 18, 19 also each have two projecting, resilient contact regions which, in a given mounting position, project outwardly from the housing side wall of the coupling 1.

Finally, a protective conductor contact 35 is fastened to the end face of the insulating material housing, in particular the second base body 32, and has two resilient contact tongues 36 projecting downward in fig. 3.

The coupling 1 is of modular construction and is formed from relatively simple plastic mouldings and plate elements, wherein the coupling may be provided with or without contacts 18, 19 depending on the purpose of the application.

In the embodiment of fig. 1, a corresponding coupling is shown, which has two plug-in areas separated from one another by a separating wall. The details of the corresponding coupler are shown in exploded form in fig. 3. Fig. 4 shows an L-shaped contact strip 23, which in the position of use is combined with a strip 28 and a spring 29.

Figure 5 shows an exploded view of the same. Fig. 6 is a side view of the corresponding coupler 1. Fig. 7 shows the same coupler along section line a-a of fig. 6. Here, the interaction between the L-shaped contact strip 23 and the planar strip 28 and the spring element 29 can be seen in particular. Fig. 8 shows in the same way a partial cross-section, in which the L-shaped contact strip 23 and the spring 29 are also shown, here in top view. Fig. 9 also shows this detail.

Fig. 10 shows an end view of the coupler.

Such a coupling can be used as a separate piece, for example to connect two busbars to one another. However, such a coupling can also be used in particular as a component of other associated components, as will be explained below.

Fig. 11 to 14 show, for example, a design in which the coupling 1 has only a region on the first side of the central cross section, i.e. on the side of the partition wall, which serves as a coupling for the busbar connection. The side of the coupling 1 opposite the partition wall is configured as a feed. For this purpose, the insulating part 37 can be plugged or plugged onto a plug-in region of the coupling 1. The insulating element 37 carries, parallel to the plug direction of the coupling 1, second electrical conductors 38 to 44, which are punched parts made of sheet steel, on correspondingly extending guide rails. These electrical conductors are inserted with one end into a corresponding passage of the insulating element 37, wherein they are electrically conductively connected to a corresponding contact of the coupling 1 at the plug-in position on the coupling 1. The insulator 37 remains in firm mechanical contact with the coupler 1 in the plugged position. The free ends of the second electrical conductors 38-44 project from the insulating part 37 on the side facing away from the coupling 1, to be precise in the same direction. They are all directed at an acute angle away from the plate 45 inserted on the insulator. The free ends of the second electrical conductors 38 to 44 each have a contact piece 46, which is formed by a resilient plug contact, which always has two plug-in regions for two conductors to be plugged in, wherein the two plug-in regions are each formed in a separate, resilient manner. These details can be seen in particular from the view according to fig. 13. In the given installation position, the free ends projecting from the insulating part 37, together with the elastic plug contacts, are surrounded by channel-like insulating parts 47, 48 which are plugged onto said free ends and snap into the insulating part 37 or into one another and/or are snapped or latched onto the plate 35. The respective contact 46 is located behind a region in which these insulating parts 47, 48 have two plug openings, one for each of the two conductors of each contact 46. This design is particularly advantageous because the mounting end, which is to be connected to the respective conductor to the contact piece 46, does not have to be connected horizontally in the plane close to the plate 45, but rather a comfortable transport of the conductor to the plug opening of the insulating part 47, 48 and thus to the contact piece 46 is achieved by the bending and different spacing design of the contact piece 46. The installation is thus significantly simplified. In particular, the installation can be carried out without tools.

The circular openings on the end faces of the insulating portions 47, 48 are used for inserting conductor cores. Rectangular openings on the top surfaces of the insulating portions 47, 48 are used for mounting inspection with a voltage checker or the like. They are also used to loosen the individual conductors in the contact 46 with the blade of a tool, such as a screwdriver.

Another particularity is that the plate 45 has an opening 49 in the region facing away from the insulating element 37, which region projects beyond the channel-like insulating parts 47, 48. When mounted, the board can be mounted with, for example, a cable outlet on the top cover side, so that the cable can protrude through the opening 49 and the core wire of the cable can stretch to and contact the contact 46. After the installation and the connection of the respective core to the contact element 46, an additionally provided housing cover 50 can be inserted and installed, which can be fixed in a suitable manner, for example by screws, to the component made of insulating material. For this purpose, in this exemplary embodiment, a corresponding screw cap (schraubdem) is provided on insulating part 47, into which the screws shown above in fig. 13 can be screwed.

In the case of the use of the same coupler 1, the application diversity of the components is significant, since not only can the feed be designed in accordance with fig. 11 to 14 in conjunction with the coupler 1, but also it can be provided that two couplers 1 are directly connected with a feed located therebetween, as shown in fig. 15 and 16. Furthermore, it is possible to make an L-connection to the busbars by means of a mechanism, in which the feeding can be carried out by means of cables passing through the openings 49 and/or a through-connection of one coupler 1 to the other coupler 1 can be made by means of corresponding contact bridges. Such a contact bridge can be pre-installed already at the factory, in this case and in other embodiments, in order to reduce the installation costs for the end user.

The corresponding coupling 1 can also be used for designing T-shaped connections, as shown in fig. 19, or also for star-shaped connections, as shown in fig. 19 and 20. For cost-effective production and installation-friendly use, both a modular construction of the coupling 1 itself and a modular construction of the respective connecting elements are advantageous, wherein one and the same coupling 1 can be used for various requirements. The corresponding design of the other components that can be plugged onto the coupling 1 and can be connected thereto is also the same for all designs, wherein only different shapes of the plate 45 and the housing cover 50 have to be specified in order to achieve the corresponding design.

The present invention is not limited to these embodiments, but can be variously modified within the scope of the disclosure.

All individual and combined features disclosed in the description and/or the drawings are to be regarded as essential to the invention.

List of reference numerals

(1) Coupling device

(2) Bus bar

(3) Accommodating channel

(4) Bearing rail

(5) A first electrical conductor

(6) A first electrical conductor

(7) A first electrical conductor

(8) A first electrical conductor

(9) Protective conductor

(10) Protective conductor

(11) The fifth conductor

(12) Sixth conductor

(13) Intermediate cross section

(14) Contact point

(15) Contact point

(16) Contact point

(17) Contact point

(18) Contact point

(19) Contact point

(20) Guide part

(21) Guide part

(22) Insulating pin

(23) L-shaped contact strip

(24) Contact area

(25) First side leg

(26) Edge

(27) Second side leg

(28) Flat panel

(29) Elastic piece

(30) Middle part

(31) First substrate

(32) Second substrate

(33) A first intermediate wall

(34) Second intermediate wall

(35) Protective conductor

(36) Contact tongue

(37) Insulating member

(38) Second electrical conductor

(39) Second electrical conductor

(40) Second electrical conductor

(41) Second electrical conductor

(42) Second electrical conductor

(43) Second electrical conductor

(44) Second electrical conductor

(45) Board

(46) Contact element

(47) Insulating part

(48) Insulating part

(49) Opening of the container

(50) Shell top cover

(51) Opening of the container

Claims (15)

1. A coupler (1) for busbars (2) having a substantially U-shaped cross section, wherein carrier rails (4) of insulating material are provided on parallel side walls which laterally delimit accommodating channels (3) which respectively carry a plurality of uninsulated, exposed first electrical conductors (5-8) which are insulated from one another, are arranged parallel to one another in the longitudinal direction and face one another and are accessible from the accommodating channels, wherein the coupler (1) is configured substantially symmetrically with respect to a central cross section (13) and has contacts for contacting the conductors of the busbar (2) and has mechanical guide portions and stop portions, by means of which the coupler (1) can be inserted to a limited extent into the end sides of the busbar (2), characterized in that the contacts (14-17) are each an L-shaped contact bar (23), the contact strips are arranged in the housing part of the coupling (1) in a manner that they can be moved elastically transversely to the housing longitudinal axis, have contact regions (24) on a first leg (25) of the L shape, which laterally project beyond the two ends of a central housing stop wall, which forms or is formed on a central cross section, and with the edge (26) of a second leg (27) in the middle indirectly resting against the insulating material wall of the housing with a planar web (28), wherein a slightly V-shaped bent spring element (29) is formed on the web (28) formed from a spring plate, which has a central part (30) and projects perpendicularly to the web (28), and the leg ends of which spring element rest elastically against the outer surface of the second leg (27) of the contact strip (23), the outer surface is opposite the protruding contact area (24) of the first leg (25).

2. The coupling according to claim 1, wherein the busbar (2) consists of metal.

3. Coupling according to claim 1 or 2, characterized in that a protective conductor (9) is provided on the base of the busbar (2), which is also accessible from the receiving channel.

4. Coupler according to claim 1 or 2, characterised in that the coupler (1) has an insulating material housing with a first, substantially U-shaped base body (31) and a second base body (32) which complements the base body as a closed part, wherein the first base body (31) carries two first pairs of L-shaped contact strips (23) separated from one another by insulating webs together with a web (28) consisting of a spring plate, a first intermediate wall (33) consisting of insulating material being provided, and the second base body (32) carries two second pairs of L-shaped contact strips (23) separated from one another by insulating webs together with a web (28) consisting of a spring plate, wherein the two base bodies (31, 32) are latched to one another in a given mounting position.

5. The coupling according to claim 4, wherein two third pairs of contact strips (18, 19) and a second intermediate wall (34) of insulating material are arranged between the first and second pairs of contact strips (23), such that the third pairs of contact strips (18, 19) are arranged insulated from one another and from the first and second pairs, wherein the third pairs of contact strips also form two elastic contact regions projecting beyond the housing side walls, respectively.

6. Coupler according to claim 1 or 2, characterized in that a protective conductor contact (35) with two protruding resilient contact tongues (36) is fixed on the end face of the insulating material housing.

7. The coupling according to claim 1 or 2, wherein the region of the coupling (1) on the first side of the central cross section (13) serves as a bus bar plug, and the region on the second side of the central cross section (13) forms a feed element, in such a way that a suitably designed insulating element (37) can be plugged onto or onto the feed element, which carries second electrical conductors (38-44) made of steel plates on guide rails extending parallel to the plug direction of the coupling (1), the ends of which second electrical conductors in the insulating element (37) are in contact with contacts of the coupling (1), the free ends of which project from the insulating element (37), wherein the free ends each have a contact element (46) made of a resilient plug contact with at least one plug region, and the free ends projecting from the insulating element (37) are connected to a channel-like insulating section (47, 47, 48) The insulating parts are fixed on an insulating piece (37) and have plug openings for the electrical conductors in the region of each elastic plug contact on the end side.

8. A coupler according to claim 7, wherein the free ends of the second electrical conductors are directed in the same direction away from a plate (45) connected to or plugged onto the insulating member (37) so that they enclose an acute angle with the plate (45) which forms the mounting face with the cable entry.

9. A coupling as claimed in claim 7, wherein the resilient plug contact is provided with two separate resilient plug areas.

10. A coupler according to claim 7, wherein the insulating portions snap-lock onto the insulating member (37).

11. A coupler according to claim 7, wherein the channel-like insulating portions (47, 48) are additionally or alternatively fixed to the plate (45).

12. A coupler according to claim 11, wherein the channel-like insulating portions (47, 48) are additionally or alternatively hooked on the plate (45).

13. A coupler according to claim 7, characterized in that the plate (45) has an opening (49) as a guide for the cable in the region of the projecting channel-like insulation part (47, 48) facing away from the insulation (37).

14. The coupling according to claim 7, wherein a plurality of couplings (1) are provided with an insulating element (37), second electrical conductors (38-44), elastic plug contacts and insulating sections (47, 48) which are arranged opposite one another, facing one another in an L-shape, facing one another in a T-shape, facing one another in a star-shape, or facing one another in a straight-line, L-shape, T-shape or star-shape configuration on or fixed to a plate (45) of the respective straight-line, L-shape, T-shape or star-shape configuration, wherein these plates (45) have openings (49) as cable inserts in the middle or in the region of the corners.

15. A coupling according to claim 7, wherein a housing cover (50) is provided, which can be positioned with the opening (49) by means of one or more of the insulating piece (37), the second electrical conductors (38-44), the resilient plug contacts, the insulating parts (47, 48) and the plate (45) and can be fixed on the part covered by it.