EP3874562B1 - Clamping spring for a screwless connection terminal - Google Patents

Description

The present invention relates to a clamping spring for a screwless connection terminal for clamping a conductor, in particular for an electrical connector device.

Clamping springs for screwless connection terminals, often also in the form of cage clamps, are known to have the advantage that a conductor to be electrically connected can be installed without the use of screwing means. As the name suggests, clamping springs have the function of clamping the wire ends of a conductor to be connected, which in principle can also be a single-core or multi-core power cable with a stranded wire, a solid wire or a conductor inserted in a ferrule, to a contact element. In this case, there is an automatic adjustment to the respective cross-section of the conductor, so that one and the same connection terminal can advantageously be used for flexible lines and cables of different dimensions and designs. Connection terminals with clamping springs of the type described are used, among other things, in electrical connector systems designed for three-phase and/or alternating current, which consist of a plug part and a coupling part or a wall socket, for example appliance plugs, flange appliance plugs, surface-mounted appliance plugs, sockets and sockets, the requirements of which are also specified in the IEC standards 60309-1,-2 and EN 60309-1,-2 are used.

One from the EP 2 442 403 A1 the applicant known screwless terminal has a contact element and a prestressed mounted on this, preferably designed as a cage clamp spring. The contact element comprises a connection section with an electrical contact surface for making electrical contact with the conductor to be connected, and the clamping spring ensures that the conductor is clamped to the contact surface of the contact element and thus fixes the conductor. In the preferred embodiment as a cage tension spring, the clamping spring has a contact leg, a clamping leg and a tensioning leg, which connects the contact leg to the clamping leg. The clamp limb has a clamp opening through which the wire ends of the conductor are routed for clamping and the contact limb protrudes in a crossing manner. In addition, the clamping leg has a conductor clamping extension which is aligned essentially parallel to the contact surface of the contact element and has a clamping surface. The conductor to be connected should be clamped between a surface section of the clamping surface of the conductor clamping extension and the contact surface of the contact element. In this case, the conductor clamping extension serves to improve the function of the cross-sectional area of a clamping leg in the clamping opening of conventional clamping springs. For example, in the case of a conductor with several flexible conductors, such as a stranded line, this conductor clamping extension causes the conductor conductor profile to be pressed flat, thereby increasing the electrical contact surface and consequently reducing the ohmic resistance of the contact resistance.

A clamping spring according to the preamble of claim 1 is in DE 20 2011 103484 U1 disclosed. Another clamp spring is in DE 198 31 851 C1 disclosed.

Compared to the aforementioned prior art, it is an object of the invention to provide an improved clamping spring for a produce screwless terminal, which further improves both the transmission of the current and is designed to be mechanically more stable and easy to manufacture.

The object of the present invention is achieved by the features of claim 1 and expediently designed and further developed by the features of the dependent claims.

The clamping spring according to the invention for a screwless connection terminal is initially designed according to the prior art mentioned at the outset in that the clamping spring has a clamping leg, a contact leg and a tensioning leg. The tensioning leg is connected both to the clamping leg and to the contact leg, with the clamping leg and the contact leg crossing over one another. This crossing is designed in such a way that the clamping leg has a clamping opening through which the contact leg extends. As a result, the contact leg is prestressed against an edge of the clamping opening remote from the tensioning leg, so that an exposed wire end of the conductor to be connected can be clamped to a contact surface of a contact element of a screwless connection terminal with the aid of the contact leg. It is true that the clamping spring according to the invention comprises a clamping extension with a clamping surface, similar to the prior art mentioned at the outset. However, the clamping extension according to the invention is designed completely differently and more advantageously than the prior art. The clamping extension starts from the free end of the clamping leg that is remote from the clamping leg and initially extends away from the clamping leg, but then extends back in a substantially curved shape in the direction of the tensioning leg and is only then finally aligned in the direction of the contact leg.

Such a configuration of the clamping extension of the clamping spring has the advantage over the prior art mentioned above that the exposed wire end of an electrical conductor with the clamping spring according to the invention can be clamped more effectively, in particular significantly more stable and more efficient, lets get stuck. In contrast to the prior art, in which a single pressure area is formed with a larger pressure-loaded area, ie the clamping area of the clamping extension, the clamping spring according to the invention is equipped with two pressure areas. The first pressure area is located at the edge of the clamping opening of the clamping leg, in which the exposed wire end is clamped, ie the pressure exerted as a result of the clamping takes place on a small area. The advantage here is that the small pressure-loaded surface can cut deeper into strands and, particularly in the case of a ferrule arranged on the exposed wire end of the conductor, into corresponding notches, so that the exposed wire end is clamped particularly firmly at this point, a very high tensile strength in the direction of insertion of the conductor or along the conductor and unintentional release from the clamped position is almost impossible. Since the small pressure-loaded area is comparable to a knife blade due to its small cross-section and the resulting cutting effect, it is referred to below as a knife edge designated. A further resulting advantage of the knife edge formed on the edge of the clamping opening is that the knife edge relieves the main strain on the pull-out forces of the clamping spring due to its strong clamping force and its correspondingly provided high tensile strength. The second pressure area is located at the free end of the clamping extension, ie in the area of the clamping extension that adjoins the curved area of the clamping extension and is essentially aligned in the direction of the contact leg, and is referred to below as the clamping surface. The exposed core ends of a conductor and in particular the stranded wires or fine wires are pressed flat onto a contact surface of a contact element by the clamping surface of the clamping extension. Due to the large clamping surface of the clamping extension, the contact surface stressed by the exposed wire ends comes to rest on almost the entire usable electrical contact surface of the contact element, so that the transmission of the current between the exposed wire end of the conductor and the contact surface of the contact element is significantly improved compared to a smaller outer surface, because larger electrical contact surfaces are created with low electrical losses. The clamping spring according to the invention with a combination of the two pressure areas described above, ie the knife edge formed on the edge of the clamping opening and the clamping surface of the clamping extension, leads to a fast, safe and controlled electrical and also mechanical connection with a conductor. In particular, it simultaneously enables improved transmission of the current over a large area due to the second pressure area in the form of the clamping surface of the clamping extension and a stronger clamping effect with high tensile strength in Insertion direction of the conductor or along the conductor, in particular in the case of a ferrule attached to the exposed wire end, and consequently a main strain relief for the pull-out forces of the clamping spring, due to the first pressure area designed as a knife edge. In contrast to a clamping spring with a clamping extension according to the prior art, on which only one pressure area is formed, the clamping spring according to the invention has been further developed as a result of the two pressure areas in particular in such a way that from the outset it is designed both for good transmission of the current and for a high tensile strength in the direction of insertion of the conductor or along the conductor. In addition, the combination of the two pressure areas ensures that the exposed wire end does not bend during insertion into the clamping opening, as is possible in the case of only one pressure area, since the two pressure areas discussed above simultaneously ensure that the exposed wire end is clamped.

In addition, the design of the clamping extension of the clamping spring according to the invention is much easier and cheaper to produce than the prior art mentioned at the outset, in that the clamping extension extends directly from the free end of the clamping leg that is remote from the clamping leg, on the one hand, particularly in the case of a one-piece design of clamping leg and clamping extension, and on the other hand mechanically more stable. In the prior art mentioned at the outset, the clamping extension is formed from a section of the clamping leg, namely from the clamping opening punched out of the clamping leg, either by bending a part that has been cut out in favor of the clamping opening, but still attached one side connected to the clamping leg portion of the clamping leg in a position parallel to the contact leg, or by completely punching out this section and then attaching it to the clamping leg. A clamping extension produced in this way is according to the EP 2 442 403 A1 designed as a clamping plate or sheet metal flag. In contrast to this, the clamping extension of the clamping spring according to the invention is not formed from an initially inner section of the clamping leg, but can be regarded as an extension of the clamping leg, so to speak. The clamping extension of the clamping spring according to the invention can thus be compared to the EP 2 442 403 A1 have a larger cross-sectional area that is comparable to the clamping leg and are therefore designed to be more massive and mechanically more stable.

In one embodiment of the present invention, the clamping extension, starting from the free end of the first leg that is remote from the clamping leg, is initially essentially semicircular in shape with a bulge pointing away from the clamping leg, before it then transitions in an arc shape into an area in which the clamping extension in the Is aligned substantially parallel to the contact leg.

In a further embodiment of the present invention, the clamping extension is integrally formed on the clamping leg. A one-piece design of the clamping leg and the clamping extension is mechanically very stable. In addition, due to the one-piece design of the clamping leg and the clamping extension, further processing steps such as screwing, soldering or Join, so that such a clamping extension can also be produced more quickly and thus more cost-effectively.

In a further embodiment of the present invention, the clamping extension is not formed in one piece on the clamping leg, but is attached to the clamping leg by means of joining. Joining also includes a cohesive joining process such as welding or soldering. Such a configuration is particularly advantageous when the clamping leg and the clamping extension are made of different materials. A metal or a material with a high electrical conductivity and a high thermal conductivity is preferably used for the production of the clamping extension.

A further embodiment of the present invention provides that the clamping extension has the same material as the clamping spring. This enables a one-piece design of the clamping leg and the clamping extension, which is very stable from a mechanical point of view. Furthermore, because they are made from the same material, the clamping leg and the clamping extension also have the same material properties, such as the same electrical conductivity, the same specific resistance and the same thermal conductivity.

According to a further embodiment of the present invention, the clamping surface of the clamping extension has at least partially a surface profile. This surface profiling can have a surface structuring similar to that of a pliers profile, so that the conductor to be connected rests with improved frictional engagement. As a result, on the one hand, the electrical Contact resistance and heat transfer resistance further reduced by pressing these surface structures into the wire ends of the conductor. On the other hand, a particularly effective mechanical connection with high tensile strengths between the wire ends of the conductor and the clamping extension is also achieved in the second pressure range of the clamping spring. Thus, the wire ends of the conductor are not only clamped in the first pressure area, designed as a knife edge, between the edge of the clamping opening that is remote from the clamping leg and the contact surface of a contact element with a high tensile strength, but also with the help of the surface profiling of the clamping extension pressed profiled clamping surface with a high tensile strength to the contact surface of a contact element.

In a further embodiment of the present invention, the clamping spring and/or the clamping extension is designed as a whole as a single stamped and bent part. The clamping spring according to the invention used to connect the conductor to a contact element is made from a suitable electrically conductive material, usually metal, in a stamping and bending process. In order to obtain a clamping spring according to the invention with a corresponding shape, an additional method step is used during the manufacturing process of the clamping spring, in which preferably a stamping and bending method is also used. The clamping extension is formed directly from an end section of the clamping leg of the clamping spring that is significantly longer than that of conventional clamping legs of clamping springs, in that this extended end section is bent and aligned such that the extended end portion of the clamping leg according to the present invention first extends away from the clamping leg, then extends back in the direction of the clamping leg in a substantially curved shape and finally extends in the direction of the contact leg or in the assembled state is aligned to a contact element essentially parallel to the contact surface of the contact element.

In addition to the clamping spring according to the invention per se, the present invention also includes a screwless connection terminal for connecting an electrical conductor with the clamping spring according to one of the embodiments described above. In addition to the clamping spring according to the invention, the screwless connection terminal also has a contact element to which the conductor is to be electrically connected and which has a connection section and a contact surface. The conductor to be connected is clamped between a surface section of the clamping surface of the clamping extension of the clamping spring and the contact surface of the contact element. Such a screwless connection terminal has the same advantages over the prior art as is the case for the clamping spring according to the invention.

In one embodiment of the screwless connection terminal according to the invention, the clamping surface of the clamping extension and/or the contact surface of the contact element has at least partially a surface profile. As already described, this surface profiling can have a surface structuring similar to that of a Have a pincer profile with the result that the conductor to be connected rests with improved frictional engagement. Instead of a surface profiling of the clamping surface of the clamping extension, the contact surface of the contact element can also have a surface profiling and lead to the same advantages as have already been explained with regard to a surface profiling of the clamping surface of the clamping extension. A surface profiling of the contact surface of the contact element in addition to a surface profiling of the clamping surface of the clamping extension ensures an even further improved frictional connection when the conductor lies on it, since the outer surface of the conductor, which is clamped with a surface-profiled clamping surface, is larger in this case. This creates a particularly effective mechanical connection with very high tensile strength between the wire ends of the conductor and the clamping extension and the contact element.

In addition, the present invention also includes an electrical plug connection, which has at least one screwless connection terminal according to the invention, as mentioned above, with a clamping spring according to the invention. An electrical plug connection with a connection terminal according to the invention and in particular with a clamping spring according to the invention has the same advantages over the prior art as is the case for the clamping spring according to the invention.

Fig. 1A bis 1D:

zeigen eine Ausführungsform einer Klemmfeder in der Profilansicht (Fig. 1A), in einer Ansicht von unten in Richtung des Pfeils C auf die Klemmfeder (Fig.1B), in einer seitlichen Ansicht in Richtung des Pfeils A auf die Klemmfeder gemäß Fig. 1A und in der Perspektive (Fig. 1D),

Fig. 2A bis 2C:

zeigen ein als Kontakthülse und ein als Kontaktstift ausgebildetes Kontaktelement mit jeweils einer Klemmfeder gemäß Figuren 1A bis 1D, die mechanisch ineinander eingesteckt und elektrisch verbunden sind, in der Profilansicht, Seitenansicht, Draufsicht und in der Perspektive,

Fig. 3A bis 3D:

zeigen eine Kontakthülse als Kontaktelement mit einer Klemmfeder gemäß Figuren 1A bis 1D in der Profilansicht, Seitenansicht, Draufsicht und in der Perspektive,

Fig. 4A bis 4D:

zeigen einen Kontaktstift als Kontaktelement mit einer Klemmfeder gemäß Figuren 1A bis 1D in der Profilansicht, Seitenansicht, Draufsicht und in der Perspektive.

Further advantages, features and application possibilities of the present invention become clear from the following description of embodiments thereof and the associated figures.

Figures 1A to 1D:

show an embodiment of a clamping spring in profile view ( Figure 1A ), in a view from below in the direction of arrow C on the clamping spring ( Figure 1B ), in a lateral view in the direction of arrow A according to the clamping spring Figure 1A and in perspective ( Figure 1D ),

Figures 2A to 2C:

show a contact element designed as a contact sleeve and a contact pin, each with a clamping spring according to FIG Figures 1A to 1D , which are mechanically plugged into each other and electrically connected, in profile view, side view, top view and in perspective,

Figures 3A to 3D:

show a contact sleeve as a contact element with a clamping spring according to FIG Figures 1A to 1D in profile view, side view, top view and in perspective,

Figures 4A to 4D:

show a contact pin as a contact element with a clamping spring according to FIG Figures 1A to 1D in profile view, side view, top view and in perspective.

the Figures 1A to 1D show an embodiment of a bent clamping spring 1 in a profile view ( Figure 1A ), in a view from below in the direction of arrow C on the clamping spring 1 ( Figure 1B ), in a view towards the arrow A on the clamping spring Figure 1A and in perspective ( Figure 1D ), wherein the clamping spring 1 is designed as a cage tension spring 1 in the preferred embodiment shown, is preferably made of metal and has a clamping leg 7, a contact leg 8 and a tensioning leg 9. The clamping leg 7 and the contact leg 8 are connected to one another via the clamping leg 9, as in Figure 1A and 1D shown. A clamping opening 6 is cut out in the clamping leg 7 of the cage clamp spring 1 ( Figure 1D ), which allows the clamping leg 7 and the contact leg 8 to cross over. Through the clamping opening 6 of the cage clamp 1, the exposed wire ends 2a of a conductor 2, which is in Figures 1A to 1D however, is not shown in the in Figure 1A shown insertion direction E are introduced. The exposed wire ends 2a of a conductor 2 inserted into the clamping opening 6 then lie on the edge of the clamping opening 6 that is remote from the clamping arm 9, which represents a first pressure area with a small cross-section and acts as a knife edge due to its cutting effect on the exposed wire ends 2a 12, at ( Figure 1D ). The clamping leg 7 also has a clamping extension 10 with a clamping surface 11, the clamping surface 11 forming a second flat pressure area. In the illustrated embodiment, the clamping extension 10 is formed in one piece on the clamping leg 7 , has the same material as the clamping leg 7 and can be regarded as an extension of the clamping leg 7 . As in the Figures 1A and 1D shown, the clamping extension 10 starts from the free end of the clamping leg 7 that is remote from the clamping leg 9 and initially extends away from the clamping leg 9 and then essentially bent shape back in the direction of the clamping leg 9 to extend back, and is finally aligned in the direction of the contact leg 8 extending. In a further embodiment, the essentially curved shape of the clamping extension is semicircular. The clamping surface 11 of the clamping extension 10 is always oriented essentially parallel to the surface of the contact leg 8 and thus extends in the insertion direction E of a conductor 2 to be electrically connected (not in Figures 1A to 1D shown).

Figures 2A to 2D provide, according to one embodiment of the invention, a clamping spring 1 attached to a screwless connection element, here as a cage clamp 1 according to FIG Figures 1A to 1D formed with clamping leg 7, contact leg 8 and clamping leg 9, each with a contact element 5 in the form of a contact pin 5 and a contact sleeve or socket 5, which are mechanically plugged into one another and electrically connected. Both the contact pin 5 and the contact sleeve 5 each have a connection section 3 with a contact surface 4, which is electrically connected to a conductor 2 by means of its exposed wire ends 2a. Figure 2B shows a longitudinal section of the in Figure 2A shown arrangement, Figure 2C a perspective view and Figure 2D a cross section. The exposed wire ends 2a of the conductor 2 are pressed flat on the one hand by the clamping surface 11 of the clamping extension 10 onto the contact surfaces 4 of the respective contact elements 5, as shown in FIG Figure 2B shown. Due to the large clamping surface 11 of the clamping extension 10, the contact surface claimed by the exposed wire ends 2a covers almost the entire usable electrical Contact surface 4 of the respective contact element 5 for resting ( Figure 2D ). This leads to a very good transmission of the current between the exposed wire end 2a of the conductor 2 and the contact surface 4 of the respective contact element 5, since larger electrical contact surfaces with low electrical losses are created. On the other hand, the exposed wire ends 2a of the conductor 2 are clamped by the clamping extension 10 between the edge of the clamping opening 6 of the clamping leg 7, which is designed as a knife edge 12 and is remote from the clamping leg 9, and the contact surface 4 of the respective contact element 5, by the clamping extension 10 on exerts pressure on the edge of the clamping opening 6 of the clamping leg 7, which is designed as a knife edge 12 and is remote from the clamping leg 9 ( Figure 2C ). The small pressure-loaded area at the edge of the clamping opening 6, which is referred to as a knife edge 12 due to its small cross-section and the resulting cutting effect, can penetrate deeper into strands and in the case of a ferrule arranged on the exposed wire end 2a of the conductor 2 Cut into corresponding notches so that the exposed wire end 2a is clamped particularly firmly, there is a high tensile strength in the direction of insertion E of the conductor 2 and consequently an unintentional release from the clamped position in the direction of insertion E of the conductor 2 is not possible. In addition, the knife edge 12 relieves the main strain on the pull-out forces of the clamping spring 1 due to its strong clamping force and its correspondingly provided high tensile strength. Due to the presence of two pressure-loaded surfaces, namely the clamping surface 11 of the clamping extension 10 and the knife edge 12 at the edge of the clamping opening 6, with which the electrical contact between the exposed wire ends 2a of a conductor 2 and the contact surface 4 of the respective contact element 5 is ensured, in addition to the advantages already mentioned, it is ensured that the exposed wire end 2a of the conductor 2 does not bend when it is inserted into the clamping opening 6, since the two surfaces discussed above that are pressurized simultaneously ensure that the exposed wire end 2a is clamped. Furthermore, the simultaneous clamping of the exposed core end 2a on two pressure-loaded surfaces has the advantage that with one and the same clamping spring 1 both good transmission of the current and high tensile strength in the insertion direction E of the conductor 2 with simultaneous main strain relief through the formed knife edge 12 is made possible, while a clamping extension 10 according to the prior art with only one trained pressure area can be pronounced either for good transmission of the current or for high tensile strength in the insertion direction E of the conductor 2.

In Figures 3A to 3D as well as in the Figures 4A to 4D is in each case an embodiment of a clamping spring 1 which is attached to a screwless connection element and is used as a cage clamp spring 1 according to FIG Figures 1A to 1D formed with clamping leg 7, 8 investment leg and clamping leg 9, with a case of the Figures 3A to 3D as a contact sleeve 5 and in the case of the Figures 4A to 4D Contact element 5 designed as a contact pin 5 is shown. Figures 3B and 4B each show a longitudinal section of the corresponding Figures 3A and 4A shown arrangement, Figures 3C and 4C a perspective view and Figures 3D and 4D a cross section. The cage clamp 1 is mounted on the contact element 5 in a prestressed manner. When assembling the Cage clamp 1 is the protruding section of the connection element 3 of the contact sleeve 5 ( Figures 3A to 3C ) or contact pin 5 ( Figures 4A to 4C ) is inserted through the clamping opening 6 in such a way that the protruding section of the connecting element 3 rests at least partially against the contact leg 8 of the cage clamp 1 and the clamping extension 10 also rests with its clamping surface 11 on the protruding section of the connecting element 3, provided that no conductor has yet been inserted. In addition, the clamping leg 7 of the clamping spring 1 is in contact with the end face of the contact element 1 . This creates a non-positive connection and fixation of the cage clamp 1 on the contact element 5.

The scope of protection of the present invention, which is defined by the claims, is not limited by the specific embodiments of the invention shown in the description and the drawings and given by way of example only. Modifications to the disclosed embodiments are apparent to those skilled in the art drawings, the description and the appended claims.

Reference List

1

clamping spring

2

electrical conductor

2a

exposed wire end of an electrical conductor

3

connector section

4

contact surface

5

contact element

6

clamp opening

7

clamp legs

8th

contact leg

9

clamping leg

10

clamp extension

11

clamping surface

12

knife edge

E

insertion direction

Claims (11)

1. , Clamping spring (1) for a screwless connection terminal for connecting a conductor (2),

   wherein the clamping spring (1) has a clamping limb (7), a contact limb (8), and a tensioning limb (9), the tensioning limb (9) being connected to the clamping limb (7) and the contact limb, and the clamping limb (7) and the contact limb (8) being designed as intersecting limbs, wherein the clamping limb (7) has a clamping opening (6) through which the contact limb (8) extends, such that the contact limb (8) is in contact with an edge of the clamping opening (6) remote from the tensioning limb (9) in a pretensioned manner and an exposed wire end of a conductor (2) can be clamped with the contact limb (8) onto a contact surface (4) of a contact element (5) of a screwless connection terminal,

   wherein the clamping limb (7) has a clamping extension (10) having a clamping surface (11),

   characterized in that

   said clamping extension (10), starting from the free end of the clamping limb (7) remote from the tensioning limb (9), initially being formed so as to extend away from the tensioning limb (9), being then formed so as to extend back in the direction of the tensioning limb (9) in a substantially curved form, and finally being oriented in the direction of the contact limb (8).
2. . Clamping spring (1) according to claim 1, characterized in that the clamping extension (10), starting from the free end of the clamping limb (7) remote from the tensioning limb (9), is initially formed substantially semicircular having a curvature pointing away from the tensioning limb (9) and is then aligned in an arcuate transition substantially parallel to the contact limb (8).
3. . Clamping spring (1) according to either claim 1 or claim 2, characterized in that the clamping extension (10) is integrally formed on the clamping limb (7).
4. . Clamping spring (1) according to either claim 1 or claim 2, characterized in that the clamping extension (10) is attached to the clamping limb (7) by means of a joining process, wherein the joining can also be an integral joining process such as welding or soldering.
5. . Clamping spring (1) according to any of the preceding claims, characterized in that the clamping extension (10) has the same material as the clamping spring (5).
6. . Clamping spring (1) according to claim 1, characterized in that the clamping surface (11) of the clamping extension (10) at least partially has a surface profiling.
7. . Clamping spring (1) according to any of the preceding claims, characterized in that the clamping spring (5) and/or the clamping extension (10) is designed as a whole as a single stamped and bent part.
8. . Clamping spring (1) according to any of the preceding claims, characterized in that the clamping surface 11 forms a flat pressure region and/or in that the exposed wire end of the conductor (2) can be pressed by means of the clamping surface (11) of the clamping extension (10) flat onto the contact surface of the contact element.
9. . Screwless connection terminal for connecting an electrical conductor with a clamping spring (1) according to any of claims 1-8, wherein the connection terminal has a contact element (5) to which the conductor (2) is to be electrically connected and which has a connection portion (3) and a contact surface (4), wherein the conductor (2) to be connected is to be clamped between a surface portion of the clamping surface (11) of the clamping extension (10) and the contact surface (4) of the contact element (5).
10. . Screwless connection terminal according to claim 9, characterized in that the clamping surface (11) of the clamping extension (10) and/or the contact surface (4) of the contact element (5) at least partially has a surface profiling.
11. . Electrical plug connection, characterized in that it comprises at least one screwless connection terminal according to either claim 9 or claim 10.

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