EP3061154B1 - Spring-force terminal connection and plug connector - Google Patents

Description

• einem Isolierstoffgehäuse, das mindestens eine Leitereinführungsöffnung zum Einführen eines elektrischen Leiters hat,
• mindestens einer Klemmfeder, die einen Anlageschenkel, einen Klemmschenkel und einen den Anlageschenkel und den Klemmschenkel miteinander verbindenden Federbogen hat, und
• mit mindestens einem verschiebbar in einer Drückeröffnung im Isolierstoffgehäuse aufgenommenen Betätigungsdrücker, der eine Betätigungsfläche zur Anlage an dem Klemmschenkel und zur Verlagerung des Klemmschenkels in Richtung Anlageschenkel zum Öffnen der Klemmstelle bei Verschiebung des Betätigungsdrückers in Richtung Innenraum des Isolierstoffgehäuses hat.

The invention relates to a Federkraftklemmanschluss for clamping electrical conductors with

• an insulating housing having at least one conductor insertion opening for insertion of an electrical conductor,
• at least one clamping spring, which has a plant leg, a clamping leg and the plant leg and the clamping leg interconnecting spring bow, and
• with at least one slidably received in a presser opening in the insulating housing actuating handle, which has an actuating surface for engaging the clamping leg and the displacement of the clamping leg in the direction of plant leg to open the terminal point upon displacement of the actuating lever in the direction of the interior of the insulating material.

Such Federkraftklemmanschlüsse are used for clamping electrical conductors and are particularly advantageous when a plurality of such Federkraftklemmanschlüsse is closely installed side by side in a connector.

DE 43 36 965 A1 shows a terminal with a double-legged clamping spring, which presses an electrical conductor to be connected in each case against a busbar and electrically conductively clamped. There is provided an actuating handle for the simultaneous actuation of the opposite clamping legs to open the respective clamping points. The actuating handle has a the respective conductor insertion channel facing, semicircular, trough-shaped surface which forms a partial wall of the respective conductor insertion channel.

DE 100 37 191 C2 discloses a clamp with an insulating housing, in which a clamping spring actuating push-button has a trough-shaped guide surface for a electrical conductor to be inserted.

Out EP 0 899 818 B1 a terminal with a arranged in a terminal housing box spring is known, which has a clamping leg for clamping an electrical conductor. It is provided in the longitudinal direction of the clamping leg to the clamping end towards sliding actuator part having a passage for the passage of an electrical conductor. The passageway extends from a conductor insertion opening at the pusher end to a conductor exit opening at the inner end of the actuator. The passage and the conductor insertion opening of the operating part are open on one side along a longitudinal side and closed at the open side by the terminal housing.

From the DE 203 08 863 U1 Another terminal is known, which discloses the features of the preamble of claim 1.

Based on this, it is an object of the present invention to provide an improved spring terminal connection, in which an actuating handle is very compact and stable added in the insulating housing.

The object is achieved by the spring force terminal connection with the features of claim 1. Advantageous embodiments are described in the subclaims.

The object is further achieved by the connector with an insulating material and with at least one such Federkraftklemmanschluss. It is proposed that at least one pusher opening in the insulating housing is provided for receiving an associated actuating pusher, wherein this pusher opening is opened in each case to an associated conductor insertion opening. The displaceably mounted in this handle opening actuating lever forms a part of the wall of the conductor insertion opening. This is made possible by the fact that the pusher opening is opened towards the conductor insertion opening and this open part of the pusher opening is then at least partially filled by the actuating pusher. The pusher opening is widened from an opening portion adjoining the conductor insertion opening to the back of the pusher opening opposite the conductor insertion opening. The actuating handle is adapted in cross section to the widening contour of the pusher opening. Thus, the actuating handle has adjacent to the electrical conductor, ie in the part which forms the wall of the conductor insertion opening with, a smaller width, as in the opposite region adjacent to the clamping spring. In this way, a stable mounting of the actuating lever in the insulating housing under an improved power flow is achieved in a compact design.

According to the invention, the actuating handle on the actuating surface, which is opposite to the one part of the wall of the insulating housing forming surface, a recess for receiving a portion of the clamping leg. The clamping leg is thus introduced into this recess, which has an improved storage of the actuating handle while reducing the force acting on the adjacent insulating material force and an improved leadership on the clamping leg of the clamping spring result.

It is particularly advantageous if the actuating push-button is accessible from its head end, which is accessible from the outside for displacing the actuating push-button, up to that in the interior of the insulating housing against the clamping limb Actuating surface tapers conically. Thus, a sufficient area at the head end for depressing the actuating handle is achieved in a reduced space requirement. The conical taper is optimally matched to the available space above the running obliquely to the direction of actuation and Leiterereinsteckrichtung clamping leg and ensures optimal actuation kinematics with low space requirement.

Furthermore, it is advantageous if the free end of the actuating pushbutton, which is arranged in the interior of the insulating housing adjacent to the clamping point, a projecting, the conductor insertion opening partially with forming and an electrical conductor leading to the nip nose. Such a projecting nose forms with a conductor insertion funnel and further, in particular in conjunction with the optional recess for receiving a portion of the clamping leg has the advantage of a sufficient stiffening in the operating region, which acts on the clamping leg to contribute. The risk of bending the actuating lever is thereby reduced.

For improved operation of the actuating handle from the outside z. B. by a screwdriver as an actuating tool, it is also advantageous if the outside of the insulating housing towards the free end accessible an actuating recess, for. in the form of a slot or Phillips. The free end of a screwdriver can then be guided into the slot and secured by the actuating recess from slipping.

The spring force clamping connection preferably has at least one busbar piece with a clamping section which, together with a clamping edge of the clamping leg, provides a clamping point for clamping an electrical conductor between the clamping edge and the clamping section. An inserted into an associated conductor insertion opening electrical conductor is then pressed by the force of the clamping spring against the clamping portion of the bus bar and there electrically connected to the busbar. The electrically conductive connection of the spring terminal connection to a printed circuit board or other electrical connection can be achieved when the busbar is electrically connected to at least one terminal contact, for example in the form of a solder pin, a Lötfahne or a plug contact. The solder pin or the solder tail protrude from the insulating material out.

A particularly compact and clamped to the electrical conductor spring terminal connection with a simple structure can be achieved when the conductor rail piece is integral for a clamping spring and a planar clamping portion with a protrusion to form the clamping surface, a planar clamping guide portion bent planar conductor guide surface and one of the conductor guide surface has bent contact surface. The plant leg of the U-shaped clamping spring is at least partially against the contact surface. The free end of the clamping leg is directed towards the protrusion to clamp an electrical conductor between the free end of the clamping leg of the clamping spring and the protrusion of the planar clamping portion of the busbar piece.

The busbar piece in this way forms a cage, which is closed in cross section at least partially by the clamping section, the conductor guiding surface and the contact surface, in which the U-shaped clamping spring is carried. This spring terminal connection is self-supporting insofar as acting on the electrical conductor clamping force is collected by the busbar piece and not transmitted to the insulating material on.

It is particularly advantageous if of the planar clamping portion and the conductor guide surface two juxtaposed spring arms with mutually directed protrusions to form a plug contact protrude. This can be z. B. position a printed circuit board with contact tracks arranged thereon between these spring arms or attach the spring terminal connection to such a printed circuit board and electrically conductively connect with the contact surfaces on the printed circuit board. These spring arms can z. B. protrude in the direction of extension of the contact leg or in Leitereinsteckrichtung and thus extend the Federkraftklemmanschluss down. It is also conceivable that the spring arms are bent at an angle to the plant leg or the conductor insertion direction and the extension direction of the actuating lever and extend obliquely to the plant leg in an angular range of more than 0 degrees to preferably about 45 degrees.

Figur 1 -

Querschnittsansicht durch eine Ausführungsform des Federkraftklemmanschlusses ;

Figur 2 -

Draufsicht auf den Federkraftklemmanschluss in Teilansicht;

Figur 3 -

Perspektivische Ansicht des Federkraftklemmanschlusses aus Figur 1 ohne Isolierstoffgehäuse;

Figur 4 -

Perspektivische Seitenansicht des Federkraftklemmanschlusses aus Figur 3 ohne Isolierstoffgehäuse;

Figur 5 -

Perspektivische Rückseitenansicht des Betätigungsdrückers für den Federkraftklemmanschluss aus Figur 1 bis 4;

Figur 6 -

Perspektivische Vorderansicht des Betätigungsdrückers aus Figur 5;

Figur 7 -

Vorderansicht des Betätigungsdrückers mit den Schnitten A-A, B-B und C-C;

Figur 8 -

Mit den Teilfiguren a) bis c) den Betätigungsdrücker im Schnitt A-A, B-B und C-C;

Figur 9 -

Seitenansicht des Betätigungsdrückers aus Figuren 5 bis 8;

Figur 10 -

Draufsicht auf den Betätigungsdrücker aus Figuren 5 bis 9;

Figur 11 -

perspektivische Ansicht eines Elektronikgerätes mit einem Steckverbinder;

Figur 12 -

Explosionsansicht des Elektronikgerätes aus Figur 11.

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

FIG. 1 -

Cross-sectional view through an embodiment of the spring force terminal connection;

FIG. 2 -

Top view of the spring power terminal connection in partial view;

FIG. 3 -

Perspective view of spring clamp terminal FIG. 1 without insulating housing;

FIG. 4 -

Perspective side view of the spring force terminal connection FIG. 3 without insulating housing;

FIG. 5 -

Rear perspective view of the spring-force clamp connector Figure 1 to 4 ;

FIG. 6 -

Perspective front view of the actuating lever of Figure 5;

FIG. 7 -

Front view of the push button with sections AA, BB and CC;

FIG. 8 -

With the sub-figures a) to c) the actuating lever in section AA, BB and CC;

FIG. 9

Side view of the actuating lever off FIGS. 5 to 8 ;

FIG. 10 -

Top view of the actuating lever off FIGS. 5 to 9 ;

FIG. 11

perspective view of an electronic device with a connector;

FIG. 12 -

Exploded view of the electronic device FIG. 11 ,

FIG. 1 shows a side sectional view of a spring clamp terminal 1. The spring terminal 1 is formed in the illustrated embodiment as a connector and has an insulating 2, in which a plurality of conductor terminals 3 can be installed side by side. The conductor connection terminals 3 each have a busbar piece 4 and a clamping spring 5. The busbar piece 4 is formed from a folded sheet metal element and has a contact surface 6, on the an abutment leg 7 of the clamping spring 5 at least partially, for example, in the region of a subsequent to the plant leg 7 spring bow 8 and at the free end of the abutment leg 7 rests.

Of the contact surface 6 of the busbar piece 4 is bent (not visible) by 90 °, a planar conductor guide surface which extends to one of the abutment surface 6 opposite clamping portion 9. The clamping portion 9 is angled 90 ° parallel to the contact surface 6 of the not visible in the illustrated section conductor guide surface.

The clamping spring 5 has adjacent to the spring bow 8 a clamping leg 10, which extends with its free end to the clamping portion 9 of the busbar piece 4. The clamping portion 9 has a protrusion 11 for forming a defined clamping surface on which an unillustrated electrical conductor is clamped when inserted into a conductor insertion opening 12 of the insulating housing 2 through the free end of the clamping leg 10. Thus, the force of the clamping spring 5 is concentrated on the protrusion 11 with a reduced contact surface and ensures secure contact with sufficient surface pressure.

The clamping leg 10 has a bend 13 for forming an actuating recess into which an actuating surface 14 of an actuating printer 15 is immersed. The actuating printer 15 is slidably received in a presser opening 16 of the insulating housing 2. It can be seen that the actuating lever 15 is accessible at a head end 17 from the outside of the insulating housing 2 for moving the actuating pushbutton 15 in Leitereinsteckrichtung L from the outside. The head end 17 has an actuating recess 18 for receiving the free end of a screwdriver to push the actuating handle 15 by means of a screwdriver to open the nip down. The actuating recess 18 may be performed, for example, as a slot or Phillips.

It is clear that the actuating lever 15 is tapered from the head end 17 to the actuating surface 14 in the interior of the insulating housing 2. At least in the area of the actuating surface 14, the actuating handle 15 has a recess 19 on the rear side, which is bounded laterally by two opposite edge webs 20. The clamping leg 10 immersed in this recess 19, whereby the actuating lever 15 is guided tilt-proof on the clamping legs 10. It is also clear that at the head end 17 opposite end of the actuating handle 15 is provided in the direction of a conductor insertion opening 12 protruding nose 21 on which the actuating surface 14 is present on the back. This lug 21, together with the adjacent Isolierstoffgehäuse 2 a conductor insertion funnel 12 a to guide an electrical conductor through the conductor insertion opening 12 to the formed by the protrusion 11 and the free end of the clamping leg 10 clamping edge 22 formed clamping point for the electrical conductor.

It can be seen that the actuating pushbutton 15 forms a part of the wall of the conductor insertion opening 12 together with the insulating housing 2 adjoining it, not only in the area of the projecting nose 21, but also in the area above it adjacent to the conductor insertion opening 12. This allows a very compact design of the spring terminal connection. 1

From the contact surface 6 of the busbar piece 4 protrudes in Leiterereinsteckrichtung L or in the direction of extension of the contact leg 7 of the clamping spring 5, a first spring arm 23 a from. A second spring arm 23b extends parallel to the first spring arm 23a. This spring arm is bent from the same sheet material of the invisible conductor guide surface. Both spring arms 23a, 23b each have a protrusion 24 and together form a plug contact for contacting a non-visible contact surface of a printed circuit board 25, which can be pushed between the spring arms 23a, 23b. Thus, the spring terminal connection 1 can be placed on a printed circuit board 25, electrically conductively connect with the contact tracks on the circuit board 25 and establish an electrically conductive connection to a clamped electrical conductor.

It is also clear that the insulating housing 2 is in two parts and has an upper part 26 and a lower part 27. The upper part 26 receives the clamping spring 5 and the busbar piece 4 and the actuating handle 15 and is closed by the lower part 27. The lower part 27 and the upper part 26 are preferably locked together by means of locking elements. The lower part 27 has at least one protective sleeve 28 which surrounds the spring arms 23a, 23b and has an opening for insertion of the printed circuit board 25 in the lower end.

FIG. 2 lets a top view in a partial view of the spring force clamp connection 1 recognize. Shown is only a single conductor terminal. The spring force terminal 1 may have several such conductor terminals 3 side by side. It can be seen from the top view that the actuating pushbutton 15 forms part of the wall of the conductor insertion opening 12. The insulating housing 2 is in this case opened to the pusher opening 16, wherein the pusher opening 16 is substantially wider than the leading to the conductor insertion opening 12 channel 29. The pusher opening 16 is thus widened, starting from a mouth portion 50 adjoining the conductor insertion opening 12, starting from the back 51 of the pusher opening 16 which lies opposite the conductor insertion opening 12. The actuating handle 15 is adapted in cross-section to the widening contour of the pusher opening 16. Thus, the actuating handle 15 is tilting and twisting out in the insulating housing 2 and yet provides a very compact design safely.

It can further be seen that the pusher opening 16 is widened in extension of the actuating recess 18 by a bulge 52 in the insulating material 12. Thus, the actuating handle 15 can be operated (depressed) taking advantage of the available space and in compliance with the clearance and creepage distances with conventional broader screwdrivers. The bulge 52 has a bottom surface 53 with a maximum operating depth is specified. Characterized in that a screwdriver at maximum insertion depth impinges on the bottom surface 53, an overload of the actuating lever 15 and / or the clamping spring can be effectively prevented.

Adjacent to the actuating handle 15 opposite to the conductor insertion opening 12, a test opening 30 is provided in the insulating housing 2, which leads to the spring bow 8 of the clamping spring 5. By inserting a test pin through the test opening 30 can be checked whether an electrical potential is applied to the conductor terminal 1. In this case, the test opening 30 preferably leads to the conductor rail piece 4, so that it comes into electrical contact with the conductor rail piece 4 test pin. This has in comparison to the tap on the clamping spring 5 has the advantage that the ohmic resistance of the busbar piece 4 is usually lower than the ohmic resistance of the clamping spring 5 and the voltage potential so that the busbar piece 4 more accurate, i. unaffected by a voltage drop across the clamping spring 5 can be measured.

FIG. 3 shows a perspective view of a conductor terminal 3, which is formed by the busbar piece 4, the clamping spring 5 and the actuating handle 15. It is clear that the contact leg 7 of the clamping spring 5 is fixed by means of a bent out of the contact surface 6 of the busbar piece 4 material tab 31 on the contact surface 6. This material flap 31 preferably engages in a recess 60 of the abutment leg 7 in order thereby to fix the abutment leg 7 in the vertical direction on the conductor rail piece 4 or to secure it there.

Furthermore, it is clear that the clamping portion 9 is bent from a perpendicular thereto in the direction of contact surface 6 extending conductor guide surface 32 and is supported by this freely in space.

It can also be seen that the second spring arm 23b is also freely punched or cut free from the conductor guide surface 32 and folded over and extends parallel to the first spring arm 23a.

FIG. 4 allows the conductor terminal 3 to be seen in the perspective rear view. Here again, it is clear that the busbar piece 4 is a one-piece sheet metal part, which has a planar conductor guide surface 32 as the main surface. Front side of the planar conductor guide surface 32 at right angles the clamping portion 9 is bent. This is formed under the formation of, inter alia, the protrusion 11, but also under formation of further protrusions further. These further protrusions serve to increase the stability of the clamping section 9 and the contact reliability.

Opposite to the clamping portion 9, the abutment surface 6 is bent, which consists of an upper folded portion and a lower folded portion. At the lower folded portion of the material flap 31 is bent to fix the plant leg 7. Further, from the lower portion of the abutment surface 6, the first spring arm 23a in the conductor insertion direction L extends downward, i.e. in the direction of extension of the abutment leg 7 of the clamping spring. 5

In this illustration, it is clear that the actuating pushbutton 15 at the rear has a depression 19 which is bounded on both sides by webs 20 and in which the clamping leg 10 of the clamping spring 5 is partially accommodated. Thus, the actuating lever 15 is guided on the clamping leg 10 tip over. It is also clear that on the actuating handle 15, the nose 21 in the direction planar clamping portion 9 of the busbar piece 5 and in particular in the direction of the protrusion 11 of the clamping section 9 extends.

FIG. 5 lets recognize a rear perspective view of the actuating handle 15. It is clear from this that the actuating pushbutton 15 at the rear has a recess 19 extending from the head end 17 to the lower free end with the actuating surface 14, which recess is delimited laterally by webs 20. The recess 19 runs in the direction of the lower free end to form an actuating surface 14 convexly curved and leads to the nose 21st

FIG. 6 shows a front perspective view of the actuating handle 15 recognize. Here it is clear that opposite to the rear recess 19 with the webs 20, a concave curved and opposite to the main part 35 of the actuating handle 15 protruding conductor guide surface 33 is provided which extends from the head end 17 to the free end to the nose 21. This concave conductor guide surface 33 forms part of the conductor insertion opening 12 and is formed to form two in the longitudinal direction of the actuating handle 15 extending guide cuts 34 narrower than the main part of the actuating handle 15 in cross section. This concave conductor guide surface 33 is received in the narrow channel 29 of the insulating housing 2 and adjoins the pusher opening 16 in the insulating housing 2.

The actuating handle 15 is thus formed in cross-section approximately T-shaped.

Furthermore, it can be seen that the actuating handle 15 is tapered from the head end 17 to the lower free end with the nose 21, ie, is tapered.

FIG. 7 shows a front view of the actuating pushbutton 15 with the sections AA in the upper region, BB in the central region and CC in the lower region of the nose 21. The section AA is in the partial figure a) of FIG. 8 shown. Part figure b) shows the section BB and part c) the section CC.

It will be appreciated that the material thickness of the actuator pusher 15, due to the tapered (tapered) shape of the actuator pusher 15, from the head end 17 toward the free end of actuation, i. decreases in the sequence of the section A-A to the section C-C. It is also clear that the actuating handle 15 is approximately T-shaped in cross-section with a widened main part 35 and a centrally projecting therefrom concave conductor guide surface 33.

FIG. 9 allows a side view of the actuating handle 15 recognize. In this case, again the tapered from the head end 17 to the free end of operation with the nose 21 contour of the actuating handle 15 clearly. It is also clear that the concave conductor guide surface 33 leading to the nose 21 is narrower than the main part 35 to form lateral guide incisions 34.

FIG. 10 lets a top view of the actuating handle 15 recognize. Here again the cross-sectionally T-shaped form becomes clear. It can also be seen that opposing the concave conductor guide surface 33 and the nose 21, a latching nose 36 is formed, which cooperates with a corresponding stop or a corresponding detent opening in the conductor insertion opening 2 in the region of the presser opening 16 and prevents the actuating pushbutton 15 from the insulating material. 2 can fall out.

FIG. 11 shows a perspective view of a modular electronic device 37, as it finds particular use for modular control device. The electronic device 37 is, for example, an input or output module, to the bus subscriber (sensors, actuators or other devices) to a Plug connector 38 can be connected. These bus users can then communicate with a control unit, not shown, which is connected via a data bus to the electronic device 37. The data bus is established via plug contacts 39 on the opposite side walls of the electronic device 37. A power supply can also be provided when plugging a sequence of such electronic devices 37 side by side on a mounting rail via plug contacts 40 on the opposite side walls. The electronic device 37 has a latching foot 41 on a base module 42, with which the base module 42 can be snapped onto a mounting rail (not shown).

On the base module 42, an electronic module 43 can be plugged, which has an adapted to the functionality of the electronic device 37 electronics on an existing electronic module 43 PCB. On this electronic module 43 of the connector 38 can be plugged, which forms a Federkraftklemmanschluss described above.

FIG. 12 leaves an exploded view of the electronic device 37 from FIG. 11 recognize. It is clear here that the connector 38 as in FIG. 1 sketched from a connector shell 26 and a connector base 27 is formed of an insulating material. A number of conductor terminals 3 are accommodated side by side and spaced apart electrically insulated by Isolierstoffwände in the connector upper part 26 and connector base 27. It becomes clear that the spring arms 23a, 23b protrude in the direction of the printed circuit board 25 in order to come into contact with printed conductors 44 and / or contact points on the printed circuit board 25 in the mounted state in electrically conductive contacts.

Furthermore, it can be seen that the base module 42 has a plug-in contact insert 45 with laterally accessible plug contacts 39. This plug-in contact insert 45 is connected to a parallel to the orientation of the circuit board 25 in Leitereinsteckrichtung L aligned circuit board 46 connected. This printed circuit board 46 carries a connector 47 which is provided to contact a corresponding mating connector 48 on the printed circuit board 25 when the electronic module 43 is plugged onto the base module 42.

Thus, a signal connection between the connected to the connector 38 bus subscriber via an electronic circuit board 25 and optionally on the circuit board 46 via the established by the connector 39 data bus to a directly or indirectly connected to the data bus 39 control unit can be made.

Claims (10)

1. A spring-force terminal connection (1) for clamping electrical conductors having:

   - an insulating-material housing (2) that comprises at least one conductor inserting opening (12) for inserting an electrical conductor,

   - at least one clamping spring (5) that comprises a contact limb (7), a clamping limb (10) and a spring bow (8) that connects the contact limb (7) and the clamping limb (10) to one another, and

   - having at least one actuating lever (15) that is received in a displaceable manner within a lever opening (16) in the insulating-material housing (2) and comprises an actuating surface (14) for contacting the clamping limb (10) and for displacing the clamping limb (10) in the direction towards the contact limb (7) so as to open the clamping site as the actuating lever (15) is displaced in the direction towards the inner space of the insulating-material housing (2),

   wherein the at least one lever opening (16) in the insulating-material housing (2) for receiving the allocated actuating lever (15) is open towards an allocated conductor inserting opening (12) and that the actuating lever (15) that is mounted in a displaceable manner in this lever opening (16) forms part of the wall of the conductor inserting opening (12), wherein the lever opening (16) becomes wider starting from an outlet section (50), which is adjacent to the conductor inserting opening (12), and leading to the back (51) of the lever opening (16) that is opposite the conductor inserting opening (2) and wherein the cross section of the actuating lever (15) is tailored to suit the widening contour of the lever opening (16), characterized in that the actuating lever (15) comprises, on the actuating surface that lies opposite the surface that forms a part of the wall of the insulating-material housing (2), a depression (19) for receiving a section of the clamping limb (10).
2. The spring-force terminal connection (1) as claimed in claim 1, characterized in that the actuating lever (15) tapers from its head end (17), which is accessible from the outer side so as to displace the actuating lever (15), as far as the actuating surface (14) that lies against the clamping limb (10) in the inner space of the insulating-material housing (2).
3. The spring-force terminal connection (1) as claimed in any one of claims 1 to 2, characterized in that the free end of the actuating lever (15), which is arranged in the inner space of the insulating-material housing (2) adjacent to the clamping site, comprises a protruding lug (21) that forms in part the conductor inserting opening (2) and guides an electrical conductor to the clamping site.
4. The spring-force terminal connection (1) as claimed in any one of the preceding claims, characterized in that the free end (17) of the actuating lever (15) that is accessible from the outer side of the insulating-material housing (2) comprises an actuating depression (18).
5. The spring-force terminal connection (1) as claimed in any one of the preceding claims, characterized in that the spring-force terminal connection (1) comprises at least one current rail piece (4) having a clamping section (9) that provides together with a clamping edge (22) of the clamping limb (10) a clamping site for clamping an electrical conductor between the clamping edge (22) and the clamping section (9).
6. The spring-force terminal connection (1) as claimed in claim 5, characterized in that the current rail piece (4) for a clamping spring (5) is in one piece and comprises a clamping surface (9) having a curved section (11) for forming the clamping section, a planar conductor guiding surface (32) that bends away from the clamping surface (9), and a contact surface (6) that bends away from the conductor guiding surface (32), wherein the contact limb (7) of the U-shaped bent clamping spring (5) lies at least in part against the contact surface (6), and the free end of the clamping limb (10) faces towards the curved section.
7. The spring-force terminal connection (1) as claimed in claim 6, characterized in that two resilient arms (23a, 23b) that extend adjacent to one another and comprise mutually facing curved sections (24) for forming a plug contact protrude from the clamping surface (9) and the conductor guiding surface (32).
8. The spring-force terminal connection (1) as claimed in claim 5 or 6, characterized in that the current rail piece (4) is connected in an electrically conductive manner to at least one connection contact, wherein the connection contact is embodied as a soldering pin, soldering lug or as a plug contact.
9. The spring-force terminal connection (1) as claimed in any one of claims 1 to 4, characterized in that the insulating-material housing (2) has a contact pin receiving opening that is oriented relative to the conductor inserting opening (12) and the clamping spring (5) in such a manner that an electrical conductor that is inserted into the conductor inserting opening (12) and is acted upon by means of the clamping spring (5) with a clamping force is contacted in an electrically conductive manner by a contact pin that is inserted into the contact pin receiving orifice.
10. A plug connector (38) having at least one spring-force terminal connection (1) as claimed in any one of the preceding claims, characterized in that the clamping spring (5) is received in a plug connector lower part (27), and the actuating lever (15) and the at least one conductor inserting opening (12) are received in a plug connector upper part (26), wherein the plug connector upper part (26) and the plug connector lower part (27) have latching elements for mutually latching with one another.

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