EP3145031A2 - Cable connection terminal - Google Patents

Abstract

The invention relates to a conductor connection contact element (1) for clamping an electrical conductor (20) with a busbar piece (2) and a clamping spring element (3), wherein the clamping spring element (3) has a spring tongue (8) with a clamping edge (15), and wherein the clamping edge (15) with a clamping portion of the busbar piece (2) forms a clamping point for clamping the electrical conductor (20). The clamping spring element (3) is characterized in that it is movably arranged on the busbar piece (2) and the spring tongue (8) has a support (12) for bearing on the busbar piece (2) and for effecting an opening of the clamping point is formed by movement of the clamping edge (15) away from the clamping portion during an opening movement of the clamping spring element (3) relative to the busbar piece (2).

Description

The invention relates to a conductor terminal for clamping an electrical conductor with a busbar piece and a clamping spring element. The clamping spring element has a clamping edge, which forms a clamping point for clamping the electrical conductor with a clamping portion of the busbar piece. The clamping edge can be on a spring tongue.

Such conductor connection contact elements are used in a variety of forms. The present conductor terminal contact member is primarily provided and adapted to be directly mounted on a printed circuit board and soldered to the printed circuit board to provide a printed circuit board contact for clamping an electrical conductor by means of spring clamp connection. The conductor connection contact element is particularly suitable for being able to be used without surrounding insulating material housing.

EN 20 2013 105 670 U1 shows a connection for light-emitting diodes with a push-button provided Isolierstoffgehäuse and a plurality of in the insulating housing located, conductive contact units. The contact units are made up of two metal strips. The first metal strip has an upwardly raised metal wall, which is curved on the upper side inwardly to form a semicircle. The second metal strip is connected at its one end to the upper end of the first metal strip and provided at its other end with two branching tongues. One of the branching tongues is provided for clamping the electrical conductor. The other branching tongue is aligned with the pushbutton so that the pushbutton can be pressed against the second metal strip to open the clamping point for clamping an electrical conductor formed by the first branching tongue and the first metal strip.

WO 2014/124475 A2 discloses a connection terminal for electrically connecting at least one conductor and to an electrical contact body. The terminal has an insulating housing, in which the contact body is arranged. The contact body has a stamped part with an opening and a spring element arranged in the opening. The spring element is designed as a U-shaped bent leg spring with a contact section, an adjoining spring bow and a bearing section opposite and adjoining the spring bow clamping leg. The plant leg rests on a bottom portion of the stamped part. The clamping leg is aligned to form a nip for clamping an electrical conductor to the lid portion of the stamped part. To open the nip, an actuating tool can be placed on the clamping leg through an opening in the insulating housing in order to displace it away from the cover section of the stamped part.

Based on this, it is an object of the present invention to provide an improved conductor terminal contact element for clamping an electrical conductor.

The object is achieved with the conductor connection contact element with the features of claim 1, 12 and 13. Advantageous embodiments are described in the subclaims.

For a conductor terminal contact element comprising a bus bar piece and a Clamping spring element, it is proposed that the clamping spring element is movably disposed on the busbar piece and the spring tongue has a support for bearing on the busbar piece and causing an opening of the clamping point by moving the clamping edge away from the clamping portion at an opening movement of the clamping spring element relative to the busbar piece is trained.

By the support on the spring tongue is achieved in conjunction with the mobility of the clamping spring element, that opens the clamping point formed between the spring tongues and the busbar piece for clamping an electrical conductor when the clamping spring element is moved in an opening movement. By this movement, the support reaches a support or stop position on the busbar piece, so that a further opening movement of the clamping spring element relative to the busbar piece leads to an opening movement of the spring bar then mounted on a busbar spring tongue. In this case, the clamping edge of the spring tongue is moved away from the clamping portion of the conductor rail piece in order to open a clamping point formed between clamping edge and clamping portion for clamping an electrical conductor.

To open the nip, an actuating force is not simply exerted on a firmly attached to the busbar piece clamping spring element, so as to shift the spring tongue directly. It is rather exploited by the support on the spring tongue due to leverage. By the support a fixed point is provided at the opening movement of the clamping spring element, around which pivots the spring tongue around.

This creates a very compact and very easy and reliable to be operated conductor terminal contact element.

The support of the spring tongue can as at least one laterally from the spring tongue protruding nose be formed for bearing on an associated peripheral edge of a side wall portion of the busbar piece. This nose is then formed, for example in a simple manner cohesively with the spring tongue.

The busbar piece may have a bottom portion and two side wall portions projecting from and spaced from the bottom portion. The clamping spring element then has side walls mounted on the side wall sections of the busbar section and a first transverse web connecting the side walls. The spring tongue then protrudes from the transverse web into the intermediate space between the side wall sections of the conductor rail piece facing the bottom section.

With the spaced-apart side wall portions and the bottom portion of the bus bar piece, a U-shaped conductor guide channel is provided. The side wall portions of the busbar piece are also used for storage of the clamping spring element. This is achieved in that the side walls of the clamping spring element are mounted on the side wall portions of the busbar piece and thus also guided. The first crosspiece serves as a root portion for the spring tongue and at the same time provides an actuating surface to which an actuating force for the opening movement of the clamping spring element can be exerted.

The side walls may be connected to a further second transverse web which is spaced from the first transverse web. Thus, the clamping spring element is further stabilized.

It is advantageous if the second crosspiece lies on the same side as the first crosspiece. Thus, a cup-shaped clamping spring element is provided, wherein the spring tongue in the space between the transverse webs to the opposite side between the side walls of the clamping spring element protrudes.

The clamping spring element may have bearing fingers which protrude from the clamping spring element and protrude into bearing openings of the busbar. These bearing openings can then be present, for example, on the side wall sections of the conductor rail piece. Thus, the clamping spring element can be hung with the bearing fingers on the clamping spring element to be stored there around the pivot axis forming bearing finger. These bearing fingers can be formed in an inexpensive and simple manner integral with the clamping spring element by these exposed from the sheet material of the clamping spring element and are exposed from the plane.

The bus bar piece may have a contact projection exposed around a plane of the bus bar piece. With the help of this contact projection, a reduced contact surface is created, on which the electrical conductor to be clamped rests and on which the spring force of the clamping spring element is concentrated. In this way the surface pressure is increased and the contact resistance is improved.

The contact projection may be formed, for example, as a contact tab exposed and exposed from a bottom portion of the busbar piece. This has the advantage that with the help of the free end of the contact tab, a clamping edge is provided, to which the electrical conductor to be clamped is clamped and hooked. This improves the clamping of an electrical conductor. In addition, a funnel-shaped conductor introduction is provided with the exposed contact tab, which is formed on the opposite side by the also obliquely extending spring tongue with.

The busbar piece and the clamping spring element can each have a cross section Be U-shaped curved sheet metal elements. These U-shaped bent sheet metal elements are then arranged overlapping each other to form a cage closed on the circumference. Thus, the U-shaped busbar piece can dip into the opening of the U-shaped clamping spring element or vice versa. The clamping spring element is thus mounted against rotation on the busbar piece, wherein the adjoining side wall sections and side walls provide a guide. The clamping spring element can then be either pivoted about either a bearing axis or a floating bearing around or moved longitudinally in the direction of the bottom portion of the busbar piece or shifted with a combined pivoting and sliding movement.

The clamping spring element can be mounted on a pivot bearing pivotally mounted on the busbar piece. Then it is advantageous if the axis of the pivot bearing is seen in the direction of extension of the spring tongue behind the freely movable end of the spring tongue. The clamping spring element is then pivotable on the one hand about the pivot bearing axis. On the other hand, the spring tongue is superposed with the support during an opening movement on the busbar piece. Thus, two fixed points are provided by the pivot bearing and the bearing, which lead to a further opening movement on the clamping spring element to an opening movement of the spring tongue.

The object is also achieved in that the clamping spring element is movably arranged on the busbar piece, and that the busbar piece and the clamping spring element are U-shaped bent sheet-metal elements in each case, wherein the U-shaped bent sheet metal elements arranged to overlap one another to form a cage closed on the circumference are. Thus, in principle, regardless of possible embodiments of the terminal point, an electrical conductor can be inserted into the cage space of the very compact conductor connection element and clamped there at the terminal point. Due to the relative mobility between the clamping spring element and Busbar piece is an opening and possibly closing the terminal point for the removal and possibly also for the clamping of the electrical conductor possible.

A cage may be formed by having the bus bar piece having a bottom portion and two side wall portions projecting from the bottom portion and spaced from each other, and the clamping spring member having sidewalls mounted on the sidewall portions of the bus bar piece and a first crossbar connecting the sidewalls.

The clamping spring element may have a spring tongue and in turn be movably arranged on the conductor rail piece. The spring tongue protrudes from the first transverse web into the intermediate space between the side wall sections of the conductor rail piece facing the bottom section.

Also in these variants, it is advantageous if the busbar piece has an exposed out of a plane of the busbar piece contact projection. The contact projection may be formed as a contact tab exposed and exposed from a bottom portion of the busbar piece.

The clamping spring element can also be mounted in these variants, regardless of the configuration of the terminal point on a pivot bearing pivotally mounted on the busbar piece. The axis of the pivot bearing is in Leitereinsteckrichtung behind the terminal point. In this case, the pivot bearing can be formed by at least one projecting into an associated bearing opening of the busbar piece bearing fingers of the clamping spring element.

Figur 1

- perspektivische Ansicht eines Leiteranschlusskontaktelementes;

Figur 2

- Seitenansicht des Leiteranschlusskontaktelementes aus Figur 1;

Figur 3

- Seitenansicht des Leiteranschlusskontaktelementes aus Figur 2 im Längsschnitt;

Figur 4

- Längsschnittansicht aus Figur 3 mit eingestecktem elektrischen Leiter in der Offenstellung;

Figur 5

- perspektivische Ansicht des Stromschienenstücks des Leiteranschlusskontaktelementes aus Figur 1;

Figur 6

- perspektivische Ansicht des Klemmfederelementes für das Leiteranschlusskontaktelement aus Figur 1.

The invention will be explained in more detail with reference to an embodiment with the accompanying drawings. Show it:

FIG. 1

- Perspective view of a conductor connection contact element;

FIG. 2

- Side view of the conductor connection contact element of Figure 1;

FIG. 3

- Side view of the conductor connection contact element of Figure 2 in longitudinal section;

FIG. 4

- Longitudinal view from FIG. 3 with inserted electrical conductor in the open position;

FIG. 5

- Perspective view of the busbar piece of the conductor connection contact element FIG. 1 ;

FIG. 6

- Perspective view of the clamping spring element for the conductor connection contact element FIG. 1 ,

FIG. 1 1 shows a perspective view of a conductor connection contact element 1, which is formed in the manner of a cage from a busbar piece 2 and a clamping spring element 3. The busbar piece 2 is integrally formed from a sheet metal part. It has a bottom portion 4 projecting from the side wall portions 5a, 5b spaced from each other on the opposite sides. These extend substantially over the length of the bottom portion 4. In this way, the busbar piece 2 in cross-section U-shaped or trough-shaped.

Likewise, the clamping spring element 3 has mutually opposite side walls 6a, 6b, which are connected to one another in the front region by a first transverse web 7a and in the rear region by a second transverse web 7b. In the intermediate space between the first and second transverse web 7a, 7b protrudes a spring tongue 8 from the first transverse web 7a in the direction of the bottom portion 4 of the busbar piece 2 from. The spring tongue 8 is cohesively with formed the first crosspiece 7a.

It is clear that the clamping spring element 3 is placed on the busbar piece 2 or the busbar piece 2 is inserted into the clamping spring element 3. In this case, the side walls 6a, 6b overlap with the associated side wall sections 5a, 5b of the busbar piece 2 in pairs. As a result, the clamping spring element 3 is guided on the busbar piece 2. It is movable relative to the busbar piece 2. Bearing fingers 9 protrude from the side walls 6a, 6b into associated bearing openings 10 of the side wall sections 5a, 5b of the busbar piece 2. By located below the second crosspiece 7b bearing finger 9 and the associated bearing openings 10, a floating pivot bearing is provided. The front, located under the first crossbar 7a bearing fingers 9 are freely movable in a relatively large opening of the busbar piece 2 and form a stop with a stop edge on the side wall portions 5a, 5b of the busbar piece 2, with a beyond the position shown movement of the first Crosspiece 7a away from the bottom portion 4 of the busbar piece 2 is prevented.

An electrical conductor can now be introduced from the side below the first transverse web 7a in the direction of the second transverse web 7b into the free space between the first transverse web 7a and the bottom section 4. Then, the electrical conductor is clamped at a terminal point of the conductor terminal contact element 1, which is formed by a clamping edge of the spring tongue 8 and a contact projection of the bottom portion 4. In the illustrated embodiment, a contact lug 11 is exposed from the bottom portion 4 of the busbar piece 2, which is set up obliquely in the direction of the second transverse web 7 b from the plane of the bottom portion 4. Thus, a funnel-shaped conductor insertion area is provided with a sharp-edged nip.

Due to the introduced electrical conductor, the spring tongue 8 is deflected in the direction of the plane of the transverse webs 7a, 7b. The resulting spring force is supported by the two bearing fingers 9 in the respective bearing openings 10, so that the clamping spring element 3 is opposite the conductor rail piece 2 in a fixed stable position.

To open the nip and remove an electrical conductor, the first crosspiece 7 can be pressed down in the direction of the bottom section 4. Then is achieved by support 12 on the side edges of the spring tongue 8, which in this opening movement auflagern on the associated marginal edges 13a, 13b of the side wall portions 5a, 5b, that the clamping edge of the spring tongue 8 away from the bottom portion 4 in the direction of second crosspiece 7b of Clamp spring element 1 moves. This is made possible by the pivotal mounting of the clamping spring element 3 on the busbar piece 2.

FIG. 2 leaves a side view of the conductor connection contact element 1 FIG. 1 detect. Here it is clear that the supports 12 formed as projections projecting laterally from the spring tongue 8 bear against the associated peripheral edge 13a, 13b of the side wall 6a, 6b. Now, if the clamping spring element 3 is moved relative to the busbar piece 2 by an opening movement is exerted by pressure on the first crosspiece 7a in the direction of the bottom portion 4, then moves to the first crosspiece 7a subsequent part of the spring tongue 8 also in the direction of the bottom section 4. Das Support 12 is held at the edge edges 13a, 13b of the side wall portions 5a, 5b of the busbar piece 2 at these positions fixed to the busbar piece 2. In this case, the altitude is held perpendicular to the Leiterereinsteckrichtung L or the position relative to the direction of the opening movement. A conditional for example by a pivoting movement of the spring tongue 8 displacement of the support 12 on the marginal edges 13a, 13b in Leiterereinsteckrichtung L is possibly possible within a tolerance limit. The Auflagerung the spring tongue 8 causes the freely movable end of the spring tongue 8 with his Clamping edge undergoes an opposite movement away from the bottom portion 4 of the busbar piece 2. This opens the nip.

Furthermore, it is clear that the busbar piece 2 at the rear end has a conductor collecting pocket formed by bent material lugs 14, which prevents the insertion of the electrical conductor beyond this end of the conductor connection contact element 1.

FIG. 3 leaves a side-longitudinal sectional view through the conductor terminal contact element 1 FIG. 2 detect. It becomes clear that a contact projection in the form of a contact lug 11 is cut free from the bottom section 4 and raised from the plane of the bottom section 4 in the direction of the second transverse web 7b. This is provided together with the free end of the spring tongue 8, which forms a clamping edge 15, a clamping point for clamping an electrical conductor. The clamping edge 15 facing the end of the contact tab 11 has a chamfer 16 with a plane which extends from the region of the first crosspiece 7a to the region of the lying in Leitereinsteckrichtung behind the contact tab 11 portion of the bottom portion 4. Thus, an optimized contact projection for clamping an electrical conductor is created with optimized conductor guidance, on which the clamping force of the spring tongue 8 is concentrated.

It is also clear that the freely movable end of the spring tongue 8 is further bent in the direction of the bottom portion 4. Thus, the contact end 17 of the spring tongue 8 is aligned at a steeper angle to the bottom portion 4 than the other, adjoining the first crosspiece 7a region of the spring tongue 8. This leads to the opening movement by pressure on the first crosspiece 7a in Direction bottom portion 4 of the contact portion 17 faster from the bottom portion 4 and the contact tab 11 lifts, as at a smaller angle.

It can also be seen that the bearing finger 9 located below the second transverse web 7b is mounted in a floating manner in a relatively small bearing opening 10. As a result, a kind of pivot or pivot bearing is provided with a rotation axis. By contrast, the bearing fingers 9 located below the first transverse web 7a dip into a relatively large bearing opening 10 and are essentially freely movable. These bearing fingers 9 serve essentially only to provide a stop to a stop surface 18 of the associated side wall portion 5a, 5b. For this purpose, a nose or finger arranged between the bottom section 4 and the first transverse web 7a or the adjoining region of the spring tongue 8 is present on the side wall section 5a, 5b.

By resting on the marginal edge 13a, 13b support 12 and by supporting itself in an associated bearing opening 10 at least one bearing finger 9 a fixed position or position of the clamping spring element 3 relative to the busbar piece 2 is given in the state without plugged electrical conductor.

It can also be seen that at least one side wall section 5a, 5b deflects a material tab 14 below the second transverse web 7b and is set transversely into the conductor insertion channel. This limits a conductor receiving pocket at the end.

It is also clear that the bottom portion 14 on the input side has an inclined surface 19, with which a funnel-shaped conductor insertion region is formed. A corresponding inclined surface is also provided on the side wall portions 15a, 15b of the busbar piece 2.

This is also in the perspective view FIG. 1 clear.

FIG. 4 leaves a side sectional view of the conductor terminal contact element 1 with now plugged in electrical conductor 20 recognize. The stripped end 21 of the electrical conductor 20 is inserted in Leitereinsteckrichtung L in the conductor insertion channel. The conductor connection contact element 1 is in the open position. In this case, an opening force F is exerted on the first crosspiece in the direction of the bottom section 4. It is clear that the contact section 17 moves away from the contact projection on the chamfer 16 of the contact lug 11 at the freely movable end of the spring tongue 8. Thus, the nip between the contact edge 15 and the contact projection 16 is opened at the contact tab 11 and the electrical conductor 20 can be pulled out against the Leiterereinsteckrichtung L from the conductor connection contact element 1.

FIG. 5 leaves a perspective view of the busbar piece 2 for the conductor connection contact element 1 from FIGS. 1 to 4 detect. It is clear that the busbar piece 2 is integrally formed from a sheet metal part. From the bottom portion 4, two opposing side wall portions 5a, 5b are bent, which provide a conductor insertion channel. It is clear that in the rear region of the side wall portions 5a, 5b rectangular bearing openings 10 are present, for example, with rounded corners. The cross section of these bearing openings 10 is limited and the bearing openings 10 are circumferentially completely closed.

In the front area, however, the bearing openings 10 are not completely closed circumferentially, but freely accessible. This allows a suspension of the clamping spring element 3 in the busbar piece 2. Here it is essential that a stop by abutment surfaces 18 on projecting lugs of the side wall portions 5a, 5b are present. These abutment surfaces 18 point in the direction of the bottom section 4.

It is also clear that from both side wall portions 5a, 5b at the rear end material tabs 14 to form a conductor collecting pocket on each other zuführend folded over. These material lugs 14 of a side wall portion 5a face the opposite side wall portion 5b and vice versa.

It is also clear that another material tab 22 in the region of the free end of the contact tab 11 is bent from one side wall 5a, 5b to the opposite side wall 5b, 5a. The material flap 22 is offset from the plane of the bottom portion 4 slightly in the direction of the second crosspiece 7b upwards and forms a support for the contact tab 11. This is in the FIGS. 3 and 4 to recognize even more clearly.

FIG. 6 lets recognize a perspective view of the clamping spring element 3. Again, the clamping spring element 3 is formed in each case in cross-section U-shaped bent sheet metal element. Here it is clear that of the side walls 6a, 6b respectively bearing fingers 9 are cut free and exposed in the direction of the opposite side wall 6a, 6b.

It can also be seen that the spring tongue 8 adjoins the first transverse web 7a and extends in the clearance between the first transverse web 7a and the second transverse web 7b downwards between the side wall sections 6a, 6b. The spring tongue 8 is bent out of the plane formed by the first and second transverse web 7a, 7b out down into the channel.

It is also clear that on the spring tongue 8 supports 12 are formed by protruding on both sides lugs.

Claims (19)

A conductor terminal contact element (1) for clamping an electrical conductor (20) to a busbar piece (2) and a clamping spring element (3), wherein the clamping spring element (3) has a spring tongue (8) with a clamping edge (15), and wherein the clamping edge (15 ) with a clamping portion of the busbar piece (2) forms a clamping point for clamping the electrical conductor (20), characterized in that the clamping spring element (3) is movably arranged on the busbar piece (2) and the spring tongue (8) has a support (12) has, for mounting on the busbar piece (2) and for causing an opening of the clamping point by movement of the clamping edge (15) away from the clamping portion in an opening movement of the clamping spring element (3) is formed relative to the busbar piece (2). Conductor terminal contact element (1) according to claim 1, characterized in that the support (12) of the spring tongue (8) as at least one laterally of the spring tongue (8) projecting nose for bearing on an associated peripheral edge (13a, 13b) of a side wall portion (5a, 5b) of the busbar piece (2) is formed. Conductor terminal contact element (1) according to claim 1 or 2, characterized in that the busbar piece (2) has a bottom portion (4) and two of the bottom portion (4) projecting and spaced side wall portions (5a, 5b), and that the clamping spring element (3 ) on the side wall portions (5a, 5b) of the bus bar piece (2) mounted side walls (6a, 6b) and the side walls (6a, 6b) connecting first transverse web (7a), said spring tongue (8) from the first transverse web (7a) in the space between the side wall portions (5a, 5b ) of the busbar piece (2) to the bottom portion (4) facing in protrudes. Conductor terminal contact element (1) according to claim 3, characterized in that the side walls (6a, 6b) are connected to a further second transverse web (7b), which is spaced from the first transverse web (7a). Conductor terminal contact element (1) according to claim 4, characterized in that the second transverse web (7b) on the same side edge of the side walls (6a, 6b) to the side walls (6a, 6b) as the first transverse web (7a) connects and the first and second Crosspiece (7a, 7b) so that lie on the same side of the conductor connection contact element (1). Conductor terminal contact element (1) according to one of the preceding claims, characterized in that the clamping spring element (3) bearing fingers (9) which protrude from the clamping spring element (3) and in bearing openings (10) of the busbar piece (2) protrude. Conductor terminal contact element (1) according to one of the preceding claims, characterized in that the busbar piece (2) has a contact projection exposed from a plane of the conductor rail section (2). Conductor terminal contact element (1) according to claim 7, characterized in that the contact projection as a from a bottom portion (4) of the conductor rail piece (2) exposed and exposed contact tab (11) is formed. Conductor terminal contact element (1) according to any one of the preceding claims, characterized in that the busbar piece (2) and the clamping spring element (3) in each case in cross-section U-shaped bent sheet metal elements, wherein the U-shaped bent sheet metal elements to form a circumferentially closed cage overlapping each other are arranged. Conductor terminal contact element (1) according to one of the preceding claims, characterized in that the clamping spring element (3) on a pivot bearing on the busbar piece (2) is pivotally mounted, wherein the axis of the pivot bearing in the extension direction of the spring tongue (8) behind the in Leitereinsteckrichtung (L ) freely movable end of the spring tongue (8) is located. Conductor terminal contact element (1) according to one of the preceding claims, characterized in that a pivot bearing by a in a bearing opening (10) of the conductor rail piece (2) projecting bearing finger (9) of the clamping spring element (3) is formed. A conductor terminal contact element (1) for clamping an electrical conductor (20) to a busbar piece (2) and a clamping spring element (3), wherein the clamping spring element (3) has a clamping edge (15), and wherein the clamping edge (15) is connected to a clamping section of the busbar piece (2) a clamping point for clamping the electrical conductor (20), characterized in that the clamping spring element (3) is movably arranged on the busbar piece (2), and that the busbar piece (2) and the clamping spring element (3) in each case in cross section U-shaped bent sheet metal elements are, wherein the U-shaped bent sheet metal elements to form a circumferentially closed cage are arranged overlapping each other. A conductor terminal contact element (1) for clamping an electrical conductor (20) to a busbar piece (2) and a clamping spring element (3), wherein the clamping spring element (3) has a spring tongue (8) with a clamping edge (15), and wherein the clamping edge (15 ) with a clamping portion of the busbar piece (2) forms a clamping point for clamping the electrical conductor (20), characterized in that the clamping spring element (3) is movably arranged on the busbar piece (2) that the busbar piece (2) has a bottom portion (4 ) and two of the bottom portion (4) projecting and spaced apart side wall portions (5a, 5b), and that the clamping spring element (3) on the side wall portions (5a, 5b) of the busbar piece (2) mounted side walls (6a, 6b) and a the side walls (6a, 6b) connecting the first transverse web (7a), wherein the spring tongue (8) from the first transverse web (7a) into the space between the side wall portions (5a, 5b) of the stream facing chine (2) to the bottom portion (4) protrudes. Conductor terminal contact element (1) according to claim 13, characterized in that the busbar piece (2) and the clamping spring element (3) in each case in cross section U-shaped bent sheet metal elements, wherein the U-shaped bent sheet metal elements to form a circumferentially closed cage are arranged overlapping each other , Conductor terminal contact element (1) according to claim 13 or 14, characterized in that the side walls (6a, 6b) are connected to a further second transverse web (7b), which is spaced from the first transverse web (7a). Conductor terminal contact element (1) according to one of claims 12 to 15, characterized in that the busbar piece (2) one of a Level of the busbar piece (2) has exposed contact projection. Conductor terminal contact element (1) according to claim 16, characterized in that the contact projection as a from a bottom portion (4) of the busbar piece (2) exposed and exposed contact tab (11) is formed. Conductor terminal contact element (1) according to one of claims 12 to 17, characterized in that the clamping spring element (3) on a pivot bearing is pivotally mounted on the busbar piece (2), wherein the axis of the pivot bearing in Leiterereinsteckrichtung (L) is behind the nip. Conductor terminal contact element (1) according to claim 18, characterized in that the pivot bearing by a in a bearing opening (10) of the conductor rail piece (2) projecting bearing finger (9) of the clamping spring element (3) is formed.

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