EP3507866B1 - Conductor connection clamp - Google Patents

Description

The invention relates to a conductor connection terminal with a sheet metal part and with at least one clamping spring that protrudes from the sheet metal part and is connected to the sheet metal part in a root area of the sheet metal part.

Such conductor connection terminals are known, for example, in the form of box terminals, in which several electrical conductors are connected to one another in an electrically conductive manner using a common contact element.

EP 1 855 353 B1 describes such a conductor connection terminal with a spring steel sheet and a busbar suspended in this spring steel sheet. The terminal points for connecting an electrical conductor are each formed between the free ends of leaf spring tongues and the busbar. The leaf spring tongues are cut free from the spring steel sheet in such a way that their tongue roots are firmly connected to the upper edge area of the spring steel sheet. The bus bar is inserted into a V-shaped accommodating space. The lengths of the leaf spring tongues are dimensioned in such a way that, when the clamping point is closed and unoccupied, their tongue ends reach through the window recess of the spring steel sheet and lie against the underside of the conductor rail.

DE 40 03 701 A1 shows a device connection terminal with a contact insert plate, which is bent over in a V-shape to form a elbow joint towards the terminal leg section. This results in a shaped surface of the contact insert sheet, which directly represents a side half of a socket part of a plug connection that is integrated into the device connection terminal.

DE 196 54 523 A1 discloses a conductor terminal which is formed from a busbar bar and a spring steel sheet, from which leaf springs are punched in the form of tongues, the tongue ends of which are punched free and are directed towards the busbar bar.

U.S. 9,105,991 B1 shows an electrical contact element with a two-part housing, with a connecting element between the housing parts forming a clamping area for an electrical conductor.

DE 10 2006 010309 A1 discloses a socket terminal, the socket terminal having two opposed contact members which are electrically connected to each other via a separate insert. The socket terminal has conductor entry channels that act as release buttons for an electrical conductor.

DE 10 2012 219741 A1 shows a connector with electrical contacts and a top contact opening that tapers into the connector.

DE 203 03 537 U1 discloses a box terminal for connecting a plurality of electrical conductors. In this case, a plurality of adjacent tongues are cut free from a carrier element, which together with a contact element form clamping points for electrical conductors to be clamped on. The contact tongues merge into the carrier element in a straight line.

CN 202 888 493 U shows a three-part electrical connector, a clamping spring projecting from each part in order to form a clamping point for an electrical conductor to be clamped.

US 4,397,514A discloses a conductor connection terminal with a self-retaining contact element, which is formed from a U-shaped busbar and a clamping spring connected to the busbar via a strap connection. The clamping spring is designed as a folded leaf spring with a spring loop.

U.S. 7,150,646 B2 discloses a conductor terminal with a contact element consisting of a leaf spring section and a carrier section which are welded together. The carrier section is latched in the surrounding insulating housing and has a groove-shaped receptacle for a busbar rod.

Proceeding from this, it is the object of the present invention to provide an improved conductor connection clamp which, in particular, improves the clamping of multi-wire conductors.

The object is achieved by the conductor terminal with the features of claims 1, 10 and 14. Advantageous embodiments are described in the dependent claims.

It is proposed that the sheet metal part is curved in the root area. The bulge has a groove base of a groove of the bulge oriented transversely to the main extension direction of the clamping spring. This bulge is not only present in the area of the tongue root of the clamping spring tongue, but is also found in the adjacent part of the sheet metal part, which merges into the side webs delimiting the opening. On the one hand, this curvature improves the spring elasticity of the clamping spring after it has been punched out. The clamping spring is first bent back against the spring force of the clamping spring in the bulge and then elastically deformed. In this way, the length of the clamping spring can be shortened or a very low-profile conductor connection terminal can be implemented. Furthermore, the bulge, in particular when a multi-wire conductor is inserted, means that this occurs on the elastic part of the clamping spring, so that the clamping spring is already elastically deformed when the electrical conductor is inserted. This reduces the risk of strands of a multi-wire conductor deviating in comparison to a conductor terminal without such a curvature. This is also achieved in that the spring elasticity of the sheet metal part is increased in the root area of the sheet metal part due to the curvature and this can deform elastically together with the side webs when an electrical conductor is clamped on.

The central extension of the clamping spring from the root area of the clamping spring to the clamping end of the clamping spring is to be regarded as the main direction of extension of the clamping spring. The main extension direction of the clamping spring can be defined by the area of the clamping spring lying in the conductor insertion channel between the root area and the bearing section of the sheet metal part. However, it is also conceivable that the main extension direction of the clamping spring is defined exclusively by the region of the clamping spring delimited in the conductor insertion channel by the side web and the bearing section of the sheet metal part.

It is conceivable that the sheet metal part is provided with two bulges in the root area. These two bulges can adjoin one another and be designed in opposite directions to one another, that is to say in an S-shape. This increases the elastic effect of the clamping spring. Following the first bulge, the second bulge can follow essentially in the direction of the clamping end of the clamping spring. In the direction of main extension of the clamping spring, this S-shaped design results in a kind of parallelism of the course of the clamping spring to the transverse web or to the surface of the transverse web that faces the conductor entry. The course of the main extension direction of the clamping spring is essentially in the conductor insertion channel, ie in the area between the support section and the side bar or the root area of the clamping spring.

The first curvature and the second curvature can thus be designed in such a way that the main extension direction of the clamping spring in the non-deflected state of the clamping spring is parallel, i.e. approximately parallel +-10°, to the surface of a transverse web of the sheet metal part adjoining the root area or to the transverse alignment of the transverse web is aligned transversely to the direction of longitudinal extension of the transverse web or the direction in which the clamping springs are arranged.

The conductor connection terminal can have an insulating material housing and a contact element, the contact element having the sheet metal part with the at least one clamping spring arranged thereon. The insulating housing has at least one conductor entry channel leading to a respective clamping spring. There is an opening in the sheet metal part for receiving a conductor entry channel in an associated one imported electrical conductor available. The insulating material housing can have channel side walls that delimit the conductor insertion channel and extend into the opening.

The fact that the channel side walls now protrude into the opening in the sheet metal part facilitates improved guidance, in particular of multi-wire conductors, through the opening. The strands are held together with the help of these channel side walls beyond the terminal point. When an electrical conductor is connected, the strands are prevented from moving out, for example due to the application of force by the clamping spring, or at least the risk of moving out is reduced, in that the channel side walls provide lateral guidance of the electrical conductor to be connected in the direction of conductor insertion beyond the clamping point.

The sheet metal part can be bent in the area of the opening. The channel side walls then dip through the opening in the bent section of the sheet metal part. This enables a very compact embodiment of the conductor connection terminal with good conductor routing.

For each conductor entry channel, there can be two channel side walls spaced apart from one another, which are arranged at a distance from one another and dip into the opening. This enables the conductor to be routed on both sides.

The channel side walls may be T-shaped in cross-section, particularly for the outer channel side walls, or H-shaped in cross-section, i.e. double T-shaped. These duct side walls, which have an H-shaped cross section, can be provided in particular for the conductor entry ducts lying next to one another. These T- and H-shaped cross sections increase the stability of the channel side walls with a compact design.

The groove of the first bulge can be located on the side of the sheet metal part that is opposite the side of the sheet metal part from which the clamping spring protrudes.

The at least one clamping spring is formed in one piece from the material of the sheet metal part. The clamping spring is exposed from the sheet metal part (e.g. cut or punched free) and bent out of the plane of the sheet metal part. There is a hole in the plane of the sheet metal part. This opening is the window that remains after the clamping spring has been uncovered from the sheet metal part and is delimited by two side bars.

In this way, a very material-saving conductor connection terminal can be created in which the sheet metal part, together with the clamping spring formed from it, contributes to the spring-elastic clamping of an electrical conductor.

The sheet metal part can carry an electrically conductive busbar opposite the free end of the clamping spring. The provision of such a separate conductor rail, on which the electrical conductor rests and is clamped by the spring force of the clamping spring, has the advantage that improved current transfer can be ensured by selecting a different, electrically conductive material, e.g. with a higher copper content. Alternatively, the clamping point can also be formed between the clamping spring and a web of the sheet metal part lying opposite the clamping spring.

The conductor connection terminal can have an insulating material housing with a housing part in which the sheet metal part is accommodated. The housing part is then closed with a cover part, which can be latched to the housing part, for example. The cover part then has at least one conductor entry channel leading to the one of the respective clamping springs.

The channel side walls are formed on a cover part.

Figur 1 -

Seiten-Schnittansicht einer ersten Ausführungsform einer Leiteranschlussklemme;

Figur 2 -

Seitenschnittansicht aus Figur 1 mit angeklemmtem elektrischen Leiter;

Figur 3 -

Seiten-Schnittansicht eines Kontaktelementes für die Leiteranschlussklemme aus Figur 1 und 2;

Figur 4 -

Seiten-Schnittansicht einer zweiten Ausführungsform der Leiteranschlussklemme,

Figur 5 -

perspektivische Ansicht des Kontaktelementes aus Figur 3;

Figur 6 -

perspektivische Ansicht des Deckelteils der Leiteranschlussklemme aus Figuren 1, 2 und 4;

Figur 7 -

perspektivische Vorderseitenansicht des Gehäuseteils für die Leiteranschlussklemme;

Figur 8 -

perspektivische Rückseitenansicht des Gehäuseteils der Leiteranschlussklemme;

Figur 9 -

Längsschnittansicht durch das Gehäuseteil aus Figur 7;

Figur 10 -

Längsschnittansicht durch das Deckelteil aus Figur 6;

Figur 11 -

Frontansicht des Deckelteils aus Figur 6;

Figur 12 -

Draufsicht auf das im Blechteil des Kontaktelementes aus Figur 5;

Figur 13 -

perspektivische Ansicht einer zweiten Ausführungsform eines Kontaktelementes für eine zweireihige Leiteranschlussklemme;

Figur 14 -

Seitenansicht des Kontaktteils aus Figur 13;

Figur 15 -

Frontansicht des Kontaktteils aus Figur 13 und 14;

Figur 16 -

Seiten-Schnittansicht durch eine zweireihige Ausführungsform der Leiteranschlussklemme mit dem Kontaktteil aus Figur 13 bis 15;

Figur 17 -

perspektivische Rückseitenansicht der Leiteranschlussklemme aus Figur 16;

Figur 18 -

Frontansicht der Leiteranschlussklemme aus Figur 16.

The invention is explained in more detail below by way of example with the attached drawings. Show it:

Figure 1 -

Side sectional view of a first embodiment of a conductor terminal;

Figure 2 -

side sectional view figure 1 with connected electrical conductor;

Figure 3 -

Side sectional view of a contact element for the conductor terminal figure 1 and 2 ;

Figure 4 -

Side sectional view of a second embodiment of the conductor terminal,

Figure 5 -

perspective view of the contact element figure 3 ;

Figure 6 -

perspective view of the cover part of the conductor terminal figures 1 , 2 and 4 ;

Figure 7 -

perspective front view of the housing part for the conductor terminal;

Figure 8 -

rear perspective view of the housing part of the conductor terminal;

Figure 9 -

Longitudinal sectional view through the housing part figure 7 ;

Figure 10 -

Longitudinal sectional view through the cover part figure 6 ;

Figure 11 -

Front view of the cover part figure 6 ;

Figure 12 -

Top view of the sheet metal part of the contact element figure 5 ;

Figure 13 -

perspective view of a second embodiment of a contact element for a two-row conductor terminal;

Figure 14 -

Side view of the contact part figure 13 ;

Figure 15 -

Front view of the contact part figure 13 and 14 ;

Figure 16 -

Side sectional view through a two-row embodiment of the conductor terminal with the contact part Figure 13 to 15 ;

Figure 17 -

Perspective rear view of the conductor terminal figure 16 ;

Figure 18 -

Front view of the conductor connection terminal figure 16 .

figure 1 shows a side sectional view of a first, single-row conductor terminal 1 for clamping electrical conductors. The conductor terminal 1 has an insulating material housing 2 which is formed from a housing part 3 and a cover part 4 which closes the housing part 3 at the front. The cover part 4 is pushed into the housing part 3 and locked with it. In the housing part 3 a contact element 5 is inserted, which has a sheet metal part 6 and a busbar 7 . The sheet metal part 6 has a clamping spring 8 which is exposed from the sheet metal part 6 (eg cut or punched free) and is bent out of the plane of the sheet metal part 6 . The bending out of the clamping spring 8 leaves an opening in the sheet metal part 6 limited by side webs 9. The freely movable end of the clamping spring 8 forms a clamping end which, for example, rests on the busbar 7 in the unoccupied state of rest and together with the busbar 7 forms a clamping point for clamping forms an electrical conductor clamped between the terminal end 10 and the busbar 7 .

It is clear that the sheet metal part is bent in a U-shape and has a support section 11 for the conductor rail 7 adjacent to the terminal end 10 .

The cover part 4 has a conductor entry channel 12 which is delimited by the side walls 13 of the channel. The channel side walls 13 of the cover part 4 extend laterally past the clamping spring 8 into the opening in the sheet metal part 6 . The channel side walls 13 can protrude behind the sheet metal part 6 in the direction of conductor insertion L and protrude into a conductor collecting pocket 14 . However, they can also end at the side webs 9 of the sheet metal part 6 . This provides lateral guidance of an electrical conductor to be clamped beyond the clamping point. In addition, the clamping spring 8 is centered and guided laterally.

The figure 2 omits conductor terminal 1 figure 1 now see with inserted and clamped electrical conductors 15. This electrical conductor 15 has an insulating material jacket 16 which surrounds the electrically conductive conductor core 17 . The stripped end of the electrical conductor 15 is guided laterally along the channel side walls 13 through the opening delimited by the side webs 9 of the sheet metal part 6 and dips into the conductor collecting pocket 14 . It is recognizable that the Clamping spring 8 is now shifted away from busbar 7 and rests with its clamping edge 10 on electrical conductor 15 . The stripped end of the electrical conductor 15 rests on the side of the conductor rail 7 which is diametrically opposite the clamping edge 10 . The electrical conductor 15 is pressed against the busbar 7 by the spring force of the clamping spring 8 and the electrical conductor 15 is prevented from being pulled out by the sharp-edged clamping edge 10 of the clamping spring 8 .

It is clear that the clamping spring 8 is convexly curved in the root area 18, i.e. in the transition to the frame-like sheet metal part 6 in this clamping position of the conductor rail 7. The root area 18 with this arched section contributes significantly to the spring elasticity and to the application of the necessary spring force.

Compared to figure 1 It is also clear that the sheet metal part 6 is bent a little further away from the opposite busbar 7 with its root area 18 . The root area 18 with the adjoining side bars 9 also makes a noticeable contribution to the spring elasticity

The sheet metal part 6 is folded opposite to the root area 18 with two spaced bends so that the side bars 9, which limit the opening, extend transversely (90 degrees +/-10 degrees) to the longitudinal direction of the clamped electrical conductor 15. The clamping end 10 of the clamping spring 8 moves out of the rest position ( figure 1 ) to clamp position ( figure 2 ) seen in conductor insertion direction L in front of this transverse section of the side bars 9.

It is also clear that the clamping spring 8 extends in a main extension direction H, which is defined by the central alignment of the clamping spring 8 in the conductor insertion channel 12 in the area of the clamping spring 8 delimited by the side web 9 and the bearing section 11 of the sheet metal part 6.

figure 3 shows a side sectional view through the sheet metal part 6. The clamping spring 8 is in the idle state in which the sharp-edged clamping end 10 rests on the support section 11 .

It is clear that the sheet metal part 6 is arched in the root area 18, i.e. in the transition from the transverse web 20 to the clamping spring 8. This curvature is S-shaped, i.e. it consists of a first curvature 29 and a second curvature 30 which are designed in opposite directions. At least one of these bulges 29, 30 has a groove 19, the bottom of which is aligned transversely to the main direction of extension H of the clamping spring 8. The first bulge 29 is present not only on the clamping spring 8 but also on the adjoining side bars 9 . In the transition between the cross bar 20 and the side bars 9 there is a third bulge 40 . The first and third bulges 29, 40 are also S-shaped, i.e. designed in opposite directions to one another.

The clamping spring 8 is initially bent, starting from the clamping end 10 in the root region 18, at an angle α in the rest state and then at an angle β. These two bending radii α and β are different. For example, the angle α can have an angle in the range of 38 degrees +/-2 degrees and the angle β can have an angle of 41.5 degrees +/-1 degree.

Adjacent to the clamping spring 8, the side bar 9 is initially bent down in the direction of the plane of the support leg 11 and then curved. This angle of curvature can be greater than 90 degrees and should be in the range of about 120 degrees +/- 20 degrees.

When the clamping spring 8 (ie the spring tongue) is exposed, for example by being punched out, the necessary strengthening of the clamping spring 8 in the root region 18 is achieved by this curvature described. Bending back the clamping spring 8 with the illustrated bending angles α, β leads to an elastic pre-deformation, which improves the spring forces of the clamping spring 8 and allows the clamping spring 8 to be shortened. A very compact conductor connection terminal 1 can thus be implemented. In addition, an inserted electrical conductor 15 only strikes an area of the sheet metal part 6 that is exposed by a slot from the rest of the sheet metal part 6 the clamping spring 8, which then yields resiliently when the inserted electrical conductor 15 hits it.

It can also be seen that the transverse web 20 of the sheet metal part 6 adjoining the root region 18 is inclined at an angle γ to the plane of the support section 11 . This angle γ can be in the range of 38 degrees +/-2 degrees, for example.

The transverse web 20 has a surface 41 which faces the conductor insertion channel 12 . The surface 41 and the main extension direction H of the clamping spring 8 have an approximately parallel position to one another. The transverse orientation of the transverse web 20 transversely to its direction of longitudinal extension and the main direction of extension are essentially parallel to one another.

It can also be seen that the main extension direction H of the clamping spring 8 is in the area of the conductor entry channel 12, i.e. the conductor receptacle, between the root area 18 and the bearing section 11 of the sheet metal part 6.

figure 4 reveals a second embodiment of the conductor terminal 1. Essentially, reference can be made to the description of the first exemplary embodiment. In contrast to this, however, the contact element 5 only has the sheet metal part 6 without a separate additional busbar 7. The electrical conductor 15 is clamped to the bearing section 11 of the sheet metal part 6 with the clamping spring 8.

figure 5 shows a perspective view of the sheet metal part 6 of the previously described conductor connection terminals 1. It is clear that several clamping springs 8 arranged next to one another are exposed from the sheet metal part 6 and are bent out of the plane spanned by the side webs 9 adjoining the respective root area 18 to form the opposite bearing section 11 . It is clear here that the side webs 9 remaining after the clamping spring 8 has been cut free delimit an opening 21 . The side bars 9 are transverse to the plane of the side webs 9 adjoining the root region 18 and then folded back again opposite to the conductor insertion direction L with the support section 11 . The clamping spring 8 (clamping tongue) is movably located in a region in front of the plane spanned by the vertical sections of the side webs 9, seen in the conductor insertion direction L.

It is also clear that the support section 11 has a protruding lug 22 (material flap) behind the respective terminal end 10 of a clamping spring 8, viewed in the conductor insertion direction L, on which the busbar 7 (not shown) can be supported. The conductor rail 7 can be held in a form-fitting manner in the space between these lugs 22 and the side bars 9 .

figure 6 shows a perspective view of the cover part 4 with the channel side walls 13 laterally limiting a respective conductor entry channel 12. It is clear that two adjacent channel side walls 13 of conductor entry channels 12 arranged next to one another are each connected to one another by a connecting web 23. The connecting web 23 then ends in front of narrower lugs 24 which are guided into an opening in the sheet metal part 6 delimited by a side web 9 . The webs 9 are then positioned between the lugs 24 connected to one another by the connecting web 23 of the cover part 4 .

This cover part 4 is formed from a plastic material made of insulating material and has suitable latching elements for latching the cover part 4 to the housing part 3.

It is clear that the two outer channel side walls 13 are T-shaped in cross section. The intermediate pairs of channel side walls 13 with the connecting webs 23 are H-shaped or double-T-shaped in cross section. The cross section under consideration lies in the main area behind the lugs 24.

figure 7 shows a perspective front side view of the housing part 3 of the single-row conductor terminal 1. It is clear that there are 3 latching projections 25 on the inside of the housing part, which are used to latch the cover part 4. Furthermore, protrude from the end face of the housing part 3 locking tabs 26, the into the appropriate snap-in opening of the cover part 4. The contact element is inserted into the interior of the housing part 3, which consists of the figure 5 shown sheet metal part 6 and possibly a busbar 7 is formed. The housing part 3 is then connected to the in figure 6 Cover part 4 shown closed.

figure 8 shows a perspective rear view of the housing part 3 from figure 7 . It is clear that there is a test opening 27 on the back of the housing part 3 which leads to the side bars 9 of the sheet metal part 6 . The electrical potential present at the contact element can be measured by inserting an electrically conductive test tool.

figure 9 shows a longitudinal sectional view of the housing part 3 in plan view. It is clear that the housing part 3 has several conductor collection pockets arranged next to one another in the rear area. The test opening 27, which leads into the interior of the housing part 3, can also be seen.

figure 10 shows a longitudinal sectional view of the cover part 4 in plan view. It becomes clear that the conductor entry channels 12 extend from the front side to the end of the cover part 4 . The conductor entry channels 12 initially have an expanded section and then taper conically into a tapered section. The conductor entry channels 12 are delimited by the channel side walls 13 which extend further beyond the conically tapering part and terminate in narrower lugs 24 . The material thickness of the channel side walls 13 increases starting from the lugs 14 towards the front side. The diametrically opposite duct side walls 13 of adjacent conductor entry ducts 12 are connected to one another in one piece by a respective connecting web 23 . Since the connecting web 23 and the channel side walls 13 are formed from the same insulating material, the channel side walls 13 and the connecting webs 23 do not appear separately in the sectional view, but are visible as a spread section with the channel side walls on the opposite surfaces of this material section.

figure 11 shows a front view of the cover part 4 with a view of the conductor entry channels 12. It is clear that in this cover part 4 for a three-pole conductor connection terminal 3 conductor entry channels 12 are arranged next to one another and spaced apart from one another by the channel side walls 13 with the connecting web 23. Each conductor entry channel 12 leads to a clamping point formed by a clamping spring 8 and the common conductor rail 7 extending transversely to the direction of extension of the conductor entry channels 12 in order to clamp an electrical conductor 15 inserted into a respective conductor entry channel 12 .

figure 12 shows a top view of the sheet metal part 6 of the previously described conductor connection terminals 1. It is clear that the clamping springs 8 are cut out of the sheet metal part 6 to form clamping tongues, with side webs 9 remaining. These side webs 9 are connected to one another in the root area via a common cross web 28, so that the sheet metal part 6 has a frame-like structure.

It is also clear that the side bars 9 are folded transversely upwards in a vertical section and merge into the support section 11 . This support section 11 also has a transverse web connecting the side webs 9, on which the lugs 22 are optionally arranged between the side webs 9 in the respective opening 21.

figure 13 shows another embodiment of a sheet metal part 36 for a two-row conductor terminal 31 recognize. In this case, reference can essentially be made to the previously described explanations. In this embodiment, however, the support section 11 is arranged in the plane of the vertical opening 21 or vertical section of the side bars 9 and connects two groups of clamping springs 8 which are connected to one another by a respective transverse bar 28 and are arranged mirrored to one another. The clamping tongues 8 of the opposing groups of clamping springs 8 protrude diagonally towards one another and are aligned with the support section 11 .

In the figure 3 curvature shown is present on both sides.

figure 14 shows a side view of the sheet metal part 36 figure 13 . It is clear here that two clamping springs 8 are arranged one above the other and are aligned with the central support section 11 in the vertical section of the sheet metal part 36 .

figure 15 shows a view of the sheet metal part 36 figure 13 and 14 with a view of the central support section 11. It can still be clearly seen here that the clamping end 10 of the clamping springs 8 is arranged tapering centrally at an obtuse angle. The clamping end 10 of the clamping springs 8 thus has no straight clamping edge, but a triangular clamping edge. When attempting to unscrew a clamped electrical conductor, it then slips onto one side or the other flank of the clamping edge, depending on the direction of rotation, resulting in a spiral shape that tends to lead more in the direction of conductor insertion. An electrical conductor can hardly be unscrewed with it. This embodiment of the terminal end 10 can be used for each conductor terminal 1, 31, regardless of the number of poles and also independently of the design of the contact element 5 and the insulating housing 2, 32.

It is also clear that the opposing clamping springs 8 create two rows of spring clamp connections for electrical conductors 15 .

figure 16 shows a side sectional view through such a two-row conductor terminal 31. The insulating material housing 32 is in turn designed in two parts with a housing part 33 and a cover part 34. It is only about twice as high as in the single-row embodiment. It is clear that the cover part 34 has two superimposed conductor entry channels 12 and, depending on the number of poles, several such pairs of conductor entry channels 12 arranged next to one another.

Here again, channel side walls 13 are present on the cover part 34 and protrude through the opening in the sheet metal part 6 .

It can also be seen that the conductor rail 37 in the illustrated exemplary embodiments of a two-row conductor connection terminal 31 is no longer plate-shaped, but is designed as a sheet metal part bent in a U-shape. This busbar 37 is then built into the vertically standing support section 11 in such a way that the support section 11 with the material tabs 22 is surrounded on both sides by the busbar 37 .

figure 17 shows a rear view of the two-row conductor terminal 31 on figure 16 . It is clear that here again there is a test opening 27 in the housing part 33 which leads to the sheet metal part 36 .

figure 18 16 shows a front view of the two-row conductor connection terminal 31 from FIG. A six-pole conductor connection terminal 31 is thus provided, for example.

However, variants of two-pole, four-pole, eight-pole etc. conductor connection clamps are also conceivable, ie conductor connection clamps with other integer numbers of poles.

Reference List

conductor terminal 1, 31 Surface 41 insulating housing 2, 32 conductor insertion direction L housing part 3, 33 main extension direction H cover part 4, 34 contact element 5 sheet metal part 6, 36 power rail 7, 37 clamping spring 8th side bars 9 clamping end 10 bearing section 11 conductor entry channel 12 channel sidewalls 13 ladder collection bag 14 electrical conductor 15 insulating jacket 16 conductor core 17 root area 18 groove 19 cross bar 20 breakthrough 21 Nose 22 connecting bar 23 banner 24 locking projection 25 locking tab 26 test opening 27 cross bar 28 First Bulge 29 Second Bulge 30 Third Bulge 40

Claims (15)

1. Conductor connection terminal (1, 31) with a sheet metal part (6, 36) and with at least one clamping spring (8) which projects from the sheet metal part (6, 36) and is connected to the sheet metal part (6, 36) in a root region (18) of the sheet metal part (6, 36), the root region (18) being a transition of the clamping spring (8) to the sheet-metal part (6, 36), the at least one clamping spring (8) being formed in one piece from the material of the sheet-metal part (6, 36), the clamping spring (8) being exposed from the sheet-metal part (6, 36) and being moved out of the plane of the sheet-metal part (6, 36), 36) and is bent out of the plane of the sheet-metal part (6, 36), and an opening (21) being present in the plane of the sheet-metal part (6, 36), characterized in that the sheet-metal part (6, 36) is curved in the root region (18), the curvature having a groove base of a groove (19) of the curvature aligned transversely to the main direction of extension of the clamping spring (8) and the clamping spring being bent back in the curvature against the spring force of the clamping spring.
2. Conductor connection terminal (1, 31) according to claim 1, characterized in that the conductor connection terminal (1, 31) has an insulating material housing (2, 32) and a contact element (5, 35), the contact element (5, 35) having the sheet metal part (6, 36) with the at least one clamping spring (8) arranged thereon, the insulating material housing (2, 32) having at least one conductor insertion channel (12) leading to a respective clamping spring (8), and an aperture (21) is provided in the sheet-metal part (6, 36) for receiving an electrical conductor (15) inserted into an associated conductor-insertion channel (12), the insulating-material housing (2, 32) having channel side walls (13) which delimit the conductor-insertion channel (12) and extend into the aperture (21).
3. Conductor connection terminal (1, 31) according to claim 2, characterised in that the sheet metal part (6, 36) is bent over in the region of the opening (21), wherein the channel side walls (13) dip through the opening (21) in the bentover section of the sheet metal part (6, 36).
4. Conductor connection terminal (1, 31) according to claim 3, characterised in that for each conductor insertion channel (12) there are two channel side walls (13) which are spaced apart from one another and dip into the opening (21).
5. Conductor connection terminal (1, 31) according to one of claims 2 to 4, characterised in that the channel side walls (13) are T-shaped or H-shaped in cross-section.
6. Conductor connection terminal (1, 31) according to one of the preceding claims, characterised in that the groove (19) of the curvature is located on the side of the sheet metal part (6, 36) opposite the side of the sheet metal part (6, 36) from which the clamping spring (8) projects.
7. Conductor connection terminal (1, 31) according to one of the preceding claims, characterised in that the sheet metal part (6, 36) opposite the free end of the clamping spring (8) carries an electrically conductive busbar (7, 37).
8. Conductor connection terminal (1, 31) according to one of the preceding claims, characterized in that the sheet-metal part (6, 36) has a plurality of clamping springs (8) arranged next to one another and the busbar (7, 37) extends in the direction in which the clamping springs (8) are arranged.
9. Conductor connection terminal (1, 31) according to one of the preceding claims, characterised in that the conductor connection terminal (1, 31) has an insulating material housing (2, 32) with a housing part (3, 33), in which the sheet metal part (6, 36) is received, and a cover part (4, 34) closing the housing part (3, 33), wherein the cover part (4, 34) has at least one conductor insertion channel (12) leading to a respective clamping spring (8).
10. Conductor connection terminal (1, 31) having a sheet-metal part (6) and having at least one clamping spring (8) which projects from the sheet-metal part (8) and is connected to the sheet-metal part (6) in a root region (18) of the sheet-metal part (6), the root region (18) being a transition of the clamping spring (8) to the sheet-metal part (6, 36), the clamping spring (8) being exposed from the sheet-metal part (6, 36) and bent out of the plane of the sheet-metal part (6, 36), 36) and being bent out of the plane of the sheet-metal part (6, 36), and an opening (21) being present in the plane of the sheet-metal part (6, 36), characterized in that the sheet-metal part (6) has, in the root region (18), a first curvature (29) and a second curvature (30), these two curvatures (29, 30) being formed in opposite directions to one another.
11. Conductor connection terminal (1, 31) according to claim 10, characterized in that the first curvature (29) and the second curvature (30) are formed in such a way that, in the undeflected state of the clamping spring (8), the main extension direction (H) of the clamping spring (8) is aligned parallel to the surface (41) of a transverse web (20) of the sheet-metal part (6) adjoining the root region (18).
12. Conductor connection terminal (1, 31) according to claim 11, characterised in that the main extension direction (H) of the clamping spring (8) is defined by the region of the clamping spring (8) lying in the conductor insertion channel (12) between the root region (18) and the support section (11) of the sheet metal part (6).
13. Conductor connection terminal (1, 31) according to claim 11, characterised in that the main extension direction (H) of the clamping spring (8) is defined exclusively by the region of the clamping spring (8) in the conductor insertion channel (12) bounded by the side web (9) and the support section (11) of the sheet metal part (6).
14. Conductor terminal (1, 31) with a sheet metal part (6) which has a transverse web (20), a clamping spring (8) with a root region (18) and a side web (9), the clamping spring (8) and the side web (9) projecting from the root region (18), the root region (18) being a transition of the clamping spring (8) to the sheet-metal part (6, 36), the clamping spring (8) being exposed from the sheet-metal part (6, 36) and bent out of the plane of the sheet-metal part (6, 36), and an opening (21) being present in the plane of the sheet-metal part (6, 36), characterised in that the connection between the transverse web (20) and the clamping spring (8) has a first curvature (29) and a second curvature (30) in the root region (18), the first curvature (29) and the second curvature (30) being formed in opposite directions to one another, and in that the connection between the transverse web (20) and the lateral web (9) has the first curvature (29) and a third curvature (40), the first curvature (29) and the third curvature (40) being oriented in opposite directions to one another.
15. A conductor terminal (1, 31) according to any one of claims 10 to 14, wherein the sheet metal member (6) has a transverse web (20), a clamping spring (8) having a root portion (18), and a side web (9), characterised in that the side web (9) and the clamping spring (8) are spaced apart by the bulges (29, 30, 40).

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