EP3324490B1 - Spring clamp contact for connecting an electrical conductor, conductor connection terminal and method for manufacturing a spring clamp contact - Google Patents

Description

The invention relates to a spring terminal contact for contacting electrical conductors according to the preamble of claim 1. The invention further relates to a conductor terminal formed with such a spring terminal contact and a method for producing such a spring terminal contact.

In general, the invention relates to the field of connecting electrical conductors by means of spring-loaded contacts. Such spring terminal contacts are used, for example, in conductor connection terminals, especially in connection terminals, in particular in socket terminals, for the electrically conductive connection of several electrical conductors to one another. Such spring terminal contacts can also be used, for example, in printed circuit board connectors, other connectors, terminal blocks and other electrical devices. In the WO 2014/124961 A1 discloses a spring terminal contact and a connecting terminal.

From the EP 1 353 407 A1 a connection device for conductors is known. From the DE 10 2007 035 336 B3 a spring pressure clamp is known. EP 2 551 962 A1 and DE 10 2010 009158 A1 disclose other types of spring clip contacts.

In contrast, the object of the present invention is to optimize the electrical contact with the busbar, in particular for electrical conductors in the form of stranded conductors. For a spring terminal contact that solves this task, a method for the production thereof is also to be specified.

This object is achieved in the spring-loaded contact mentioned at the outset by the characterizing features of claim 1. The electrical contacting can be achieved by means of at least one such wing or by several such wings of a stranded conductor on the conductor rail can be significantly improved, since the individual strands have a defined lateral contact surface on the conductor rail due to the wing and can therefore fit better there.

According to the invention, it was found that in the case of a busbar with one or more frame parts arranged thereon, which have a conductor leadthrough opening delimited by side bars and crossbars, in addition to the actual contact surface on the busbar provided for electrical contacting, the side bars can also be used to improve the electrical contact. As explained, the formation of at least one wing on at least one of the side webs creates an improved lateral contact surface for the strands, so that a substantial improvement in the electrical contact can be achieved. In addition, a particularly small spring clamp contact can be provided for a connecting terminal with improved electrical contacting.

The spring terminal contact according to the invention is therefore particularly suitable for the transmission of higher currents and accordingly also for electrical conductors with a larger cross section, for example for conductors up to 6 mm ² .

As mentioned, a clamping point for clamping the electrical conductor is formed in the spring terminal contact according to the invention between the clamping section and the busbar. The clamping point can be formed directly between the clamping section and the busbar, or indirectly, e.g. another component is arranged in the power flow between the clamping section and the busbar, e.g. an additional sheet. The at least one wing can in particular be arranged at a distance from the terminal point on the spring terminal contact.

According to an advantageous development of the invention, it is provided that integrally molded wings are present on both side webs of a frame part. In this way, the advantageous effect according to the invention of improving the electrical contacting can be further increased.

According to an advantageous development of the invention, it is provided that the wings of a frame part are arranged essentially symmetrically to one another. As a result, the electrical contacting of stranded conductors can be further improved.

According to an advantageous development of the invention, it is provided that the at least one wing points in the direction of a conductor receiving space of the spring terminal contact formed behind the conductor lead-through opening in the conductor insertion direction. The at least one wing can thus be arranged somewhat obliquely (at an angle) to the direction of insertion of an electrical conductor into the conductor lead-through opening. If wings are present on both side webs, these can e.g. run towards each other in a funnel shape, so that an electrical conductor inserted into the conductor lead-through opening opens into a receiving space tapering in the conductor insertion direction between the wings. In this way, the strands of the electrical conductor are slightly compressed due to the funnel-like arrangement of the wings, which further improves the electrical contact.

According to an advantageous development of the invention, it is provided that the at least one wing is designed as a material region that is angled (bent) relative to the surface of the side web. This allows simple and efficient production of the spring terminal contact already described above.

According to an advantageous development of the invention, it is provided that the at least one wing extends over at least two thirds of the distance between the transverse webs of the frame part along the side web. As a result, the electrical contacting of stranded conductors can be further improved, since a relatively large lateral contact surface for the strands is created on the wing.

A clamping point for the electrical connection of the electrical conductor is formed by the clamping section of the clamping spring and the busbar. This clamping point can be in the direction of insertion of the electrical conductor into the conductor lead-through opening depending on the embodiment of the spring clamp contact, be formed in front of or behind the frame part or in the frame part. If the clamping point is arranged behind the frame part or at least behind the area at which the wing is integrally formed on the frame part, the at least one wing can advantageously form an insertion bevel for the electrical conductor to be inserted. This facilitates the insertion of the electrical conductor into the spring terminal contact or into the frame part and towards the terminal point. But also in another arrangement such that the clamping point is arranged in the conductor insertion direction in front of the frame part or the area on which the wing is integrally formed on the frame part, the at least one wing can serve as an insertion aid for the electrical conductor to be inserted.

The angle between the conductor rail plane on which the clamping point is formed and the frame parts can advantageously be in the range from 60 degrees to 120 degrees. According to an advantageous development of the invention, it is provided that at least one of the frame parts is arranged essentially at right angles to the busbar. This allows the electrical conductor to be simply plugged into the conductor lead-through opening in conjunction with good electrical contacting of the electrical conductor on the busbar.

According to an advantageous development of the invention, it is provided that at least one of the frame parts is formed in one piece with the busbar. In this way, the structural unit can be produced simply and inexpensively from the busbar with the frame part or the frame parts. The busbar with the frame part or the frame parts arranged thereon and the wing or the wings can, for example, be produced in one piece from a metal part, for example by a stamping and bending process. For this purpose, conductor lead-through openings can be punched out of a busbar plate to form side webs and a crossbar and the side webs together with the crossbar connecting them, ie the frame parts, can be bent away from a clamping contact surface of the busbar at an acute or obtuse angle, for example before or after the step of punching out an angle in the range of 60 degrees to 120 degrees.

According to an advantageous development of the invention, it is provided that at least one of the frame parts is designed as a frame element separate from the busbar and the separate frame element is suspended in the busbar. The frame element can be held on the current rail by the force of the clamping springs acting between the crosspiece and the frame part or the frame parts of the frame element and the busbar, in that the frame element e.g. reaches under. For this purpose, holding elements in the form of holding lugs can be provided on the busbar, which are gripped by transverse webs of the frame element. It is also possible for the busbar to have latching openings or latching depressions which engage in the latching fingers of the frame element in order to releasably connect the frame element to the busbar. In this way, a particularly flexible construction of a spring terminal contact is possible.

According to an advantageous development of the invention, it is provided that the clamping section is bent or bent away from the section of the clamping leg adjoining the spring arch in the direction of the busbar. As a result, the secure clamping of an electrical conductor by the clamping spring can be improved and at the same time it can be ensured that the electrical conductor can be connected to the clamping point without prior actuation of the clamping spring.

According to an advantageous development of the invention, it is provided that adjacent frame parts have an intermediate space between two spaced-apart side webs of frame parts arranged next to one another. If an actuating element is provided for opening the clamping point, it can protrude into the space between two frame parts, so that a small-sized conductor terminal with lever actuation can be realized

According to an advantageous development of the invention, it is provided that the clamping section has a smaller width than the remaining section of the clamping leg. As a result, the at least one region of the section of the section that is laterally protruding relative to the clamping section can be wider Clamping legs can be opened as an actuating section for opening a clamping point formed between the clamping section of the clamping spring and the busbar for an electrical conductor with an actuating element which interacts with the actuating section and projects into the space between two frame parts.

According to an advantageous development of the invention, it is provided that at least one area of the clamping leg which projects laterally relative to the clamping section, as the actuating section for opening an clamping point for an electrical conductor formed between the clamping section of the clamping spring and the busbar, for an electrical conductor by means of a the actuating section cooperating actuating element is provided. This allows the clamping spring to be conveniently operated to open and close the clamping point.

The above-mentioned object is also achieved by a conductor terminal for electrical conductors with an insulating material housing and with at least one spring terminal contact of the type explained above. This also enables the advantages explained above to be realized. The conductor connection terminal can e.g. be designed as a connecting terminal. The conductor connecting terminal can have an actuating element for opening the clamping point, which cooperates with the actuating section. The actuating element can protrude into the space between two frame parts, so that a small-sized conductor terminal with lever actuation can be realized.

The above-mentioned object is further achieved by a method for producing a spring terminal contact according to claim 16.

The advantages explained above can also be realized in this way. In particular, the spring terminal contact can be produced particularly efficiently and inexpensively, since only one sheet metal part is required, which can be provided in a single stamping and bending process with the desired frame parts and the wings arranged thereon. The punching and bending process can be carried out, for example, that the contour of the busbar with the frame parts and wings arranged thereon is first punched out of a flat, essentially flat sheet metal part in such a way that the frame parts have the corresponding gaps between adjacent frame parts and the corresponding conductor leadthrough openings are formed. The required bending steps can then be carried out, either by first bending the wings on the respective side webs and then bending the frame parts relative to the busbar, or in the opposite way first by bending the frame parts opposite the power rail and then the wings on the side webs be bent.

The invention is explained in more detail below on the basis of exemplary embodiments using drawings.

Figur 1

perspektivische Ansicht eines Federklemmkontaktes mit Stromschiene und drei nebeneinander angeordneten Klemmfedern;

Figur 2

Seitenansicht des Federklemmkontaktes aus Figur 1;

Figur 3

Seiten-Schnittansicht des Federklemmkontaktes aus Figur 1;

Figur 4

Seiten-Schnittansicht durch eine Verbindungsklemme mit einem Isolierstoffgehäuse, hier einem Betätigungshebel für eine zugeordnete Klemmfeder und einem in das Isolierstoffgehäuse eingebauten Federklemmkontakt aus Figur 1 mit geöffnetem Betätigungshebel;

Figur 5

Seiten-Schnittansicht durch die Verbindungsklemme aus Figur 4 mit geschlossenem Betätigungshebel;

Figur 6

eine Frontansicht auf ein Rahmenteil;

Figur 7

eine Seitenansicht des Rahmenteils gemäß Figur 6 sowie die Stromschiene;

Figur 8

eine Querschnittsansicht des Rahmenteils mit der Stromschiene gemäß Figur 7 entsprechend der Schnittebene B-B;

Figur 9

eine Ansicht auf das Rahmenteil mit der Stromschiene entsprechend Figur 7 mit eingestecktem elektrischen Leiter;

Figur 10

eine Schnittansicht gemäß der in Figur 9 eingezeichneten Schnittebene A-A;

Figuren 11 bis 14

verschiedene Ansichten eines Teils einer weiteren Ausführungsform eines Federklemmkontakts;

Figuren 15 bis 18

verschiedene Ansichten eines Teils einer weiteren Ausführungsform eines Federklemmkontakts.

Show it

Figure 1

perspective view of a spring terminal contact with busbar and three clamping springs arranged side by side;

Figure 2

Side view of the spring terminal contact Figure 1 ;

Figure 3

Side sectional view of the spring terminal contact Figure 1 ;

Figure 4

Side sectional view through a connecting terminal with an insulating material housing, here an actuating lever for an associated clamping spring and a spring terminal contact built into the insulating material housing Figure 1 with open operating lever;

Figure 5

Side sectional view through the connecting clamp Figure 4 with closed operating lever;

Figure 6

a front view of a frame part;

Figure 7

a side view of the frame part according to Figure 6 as well as the busbar;

Figure 8

a cross-sectional view of the frame part according to the busbar Figure 7 according to the section plane BB;

Figure 9

a view of the frame part with the busbar accordingly Figure 7 with inserted electrical conductor;

Figure 10

a sectional view according to the in Figure 9 drawn section plane AA;

Figures 11 to 14

different views of part of another embodiment of a spring terminal contact;

Figures 15 to 18

different views of part of another embodiment of a spring terminal contact.

Figure 1 shows a perspective view of a spring clamp contact 1, which is essentially formed from a busbar 2 and several, for example, three clamp springs 3 as shown. The busbar 2 is made of an electrically highly conductive material, such as a copper sheet. It extends transversely to the direction of extension of the clamping springs 3 and in the direction of the series of the plurality of clamping springs 3. In this way, the electrical conductor clamped to a clamping point of the busbar 2 with a clamping spring 3 can then be electrically conductively clamped to a further clamping spring 3 of the spring clamping contact 1 electrical conductors are connected.

The clamping springs 3 each have a contact leg 4, a spring arch 5 adjoining the contact leg 4 and a clamping leg 6 adjoining the spring arch 5. The clamping legs 6 each have a clamping section 7 at the free end, on which a clamping edge is formed. With the Busbar 2 are formed for each clamping spring 3 associated frame parts 8, each having two spaced side webs 9a, 9b and an upper crossbar 10 connecting the side webs 9a, 9b at the free end. Opposite the upper crosspiece 10, the transverse busbar 2 forms a further lower crosspiece 11. Through the side crosspieces 9a, 9b and the opposing crosspieces 10, 11, a conductor lead-through opening 12 is created for the passage of an electrical conductor, which connects to the clamping edge of the clamping section 7 assigned clamping spring 3 and the contact edge 13 formed on the lower crosspiece 11 of the busbar 2. The clamping edge of the clamping section 7 of the clamping spring 3 and the contact edge 13 of the busbar 2 thus form a clamping point for the electrical conductor to be clamped.

It becomes clear that the frame parts 8 for the clamping springs 3 arranged next to one another are spaced apart from one another to form an intermediate space 14 between frame parts 8 arranged next to one another. The adjacent side webs 9a, 9b of the frame parts 8 lying next to one another are at a distance from one another. In this intermediate space 14, a section of an actuating element (not shown) can be introduced for at least one associated clamping spring 3, so that the space between the clamping springs 3 and in particular the space between the frame parts 8 can be used by the intermediate space 14 to accommodate sections of an actuating lever . This enables a very compact connection terminal to be set up.

A wing 30 is provided on the respective side web 9a of each of the frame parts 8, through which the electrical contacting of stranded conductors can be improved.

It can also be seen that the clamping section 7 of the clamping spring 3 has a smaller width than the adjoining further section of the clamping leg 6 and the spring arch 5. A region of the clamping leg 6 projecting laterally relative to the clamping section 7 is thus present, onto which an actuating contour an actuating lever can act, the actuating contour being arranged on a side wall section of an actuating lever protruding into the intermediate space 14 at least in the closed state. The axis of rotation of this actuating lever, not shown, is then below the clamping leg 6 and the spring arch 5 in the space between the clamping leg 6 and the busbar 2nd

It can also be seen that the free end of the contact leg 4 also has a smaller width than the section of the contact leg 4 and the spring bow 5 adjoining the spring arch 5. This reduced width of the contact leg 4 is adapted to the width of the conductor lead-through opening 12 of the frame part 8 in order to enable the contact leg 4 to be hooked into the conductor lead-through opening 2 for contact with the upper crosspiece 10.

Figure 2 omits a side view of the spring terminal contact 1 Figure 1 detect. It is clear that the rear free end of the contact leg 4 protrudes through the conductor leadthrough opening 12 of the frame part 8 and is suspended in the frame part 8. It can also be seen that the frame part 8 is integrally formed integrally with the busbar 2 from the same sheet metal part and is bent from the plane of the busbar adjacent to the clamping edge of the clamping spring 3 in the direction of the contact leg 4 of the clamping spring 3 at an angle of approximately 90 ° to 120 ° .

It can also be seen that the clamping leg 6, at an internal angle of approximately 70 ° to 120 ° in the direction of the plane of the busbar 2, on which the clamping edge of the clamping section 7 rests in the illustrated rest state, is bent and almost (+/- 20 °) is perpendicular to this level. From this strongly bent section standing transversely to the conductor insertion direction, the clamping section 7 is then bent back towards the free end to form a clamping edge and is at an acute angle to the aforementioned plane of the busbar 2. In this way, a direct connection of a multi-wire inserted in the conductor insertion direction L can be made electrical conductor is prevented without opening the clamping point beforehand by moving the clamping leg 6 upwards in the direction of the contact leg 4 become. Such a direct insertion of a multi-wire electrical conductor without prior actuation could lead to the unplugging of the plurality of wires of the electrical conductor, which are then located in an uncontrolled manner in the connection space.

Figure 3 omits a side sectional view through the first embodiment of the spring terminal contact Figure 1 and 2nd detect. It is clear here that the contact leg 4 is guided through the conductor lead-through opening 12 with a bent end section 15 and bears against the upper transverse web 10. The clamping spring 3 is thus fixed in position in the busbar 2. The opposite end of the U-shaped curved spring 3, that is, the clamping section 7 of the clamping leg 4 is bent in the direction of the section of the busbar 2 which extends transversely to the number of clamping springs 3 and which adjoins the frame parts 8, the free end of the Clamping section is at an acute angle to this transverse section of the busbar 2. A subsequent section of the clamping leg 6, which is approximately transverse to the conductor insertion direction L and the section of the busbar 2, is oriented at an obtuse angle to the transverse section of the busbar 2 in order to prevent a multi-wire electrical conductor from being plugged in directly without prior actuation of the clamping spring 3 .

Figure 4 shows a cross-sectional view of a connecting terminal 16 with an insulating housing 17. The insulating housing 17 is made in two parts and has a main housing part 18 made of insulating material, which is closed with a cover part 20 after inserting an actuating lever 19 and the spring-loaded contact 1. The main housing part 18 and cover part 20 are locked together in order to mount the actuating lever 19 with a pivot bearing section 21, which has a part-circular circumference, on this part-circular circumference with part-circular bearing contours 22 adapted to it in the insulating material housing 17. The pivot bearing section 21 can also be supported on the busbar 2.

It becomes clear that the pivot bearing section 21 has an actuating contour 23 in the form of a V-shaped cutout which merges into the outer circumference via a curved path. The clamping leg 6 of the associated clamping spring 3 rests with a lateral area on this actuating contour 23, so that the clamping leg 6 is displaced away from the transverse section of the busbar 2 in the open position of the actuating lever 19 shown.

An electrical conductor can then be introduced via a conductor insertion opening 24 in the insulating material housing 17, which is open at the end and opens into the connection space of the spring terminal contact 1. This is then guided over the inclined section of the busbar 2, which extends transversely to the clamping springs 3, through the conductor leadthrough opening 12 of the associated frame part 8 of the spring terminal contact 1. The free stripped end of an electrical conductor then passes into a conductor receiving pocket 25 located in the conductor receiving space 35, which is located in the conductor guide direction L, i.e. Seen in the direction of extension of the conductor insertion opening 24, lies behind the conductor bushing opening 12 of the frame part 8.

Figure 5 omits the connecting terminal 16 Figure 4 recognize in the closed state. Here, the operating lever 19 is folded down in the direction of the insulating housing 17. The actuating contour 23 has rotated by pivoting the pivot bearing section 21 by approximately 90 °. This enables the clamping leg 6 to be displaced downward from the contact leg 4 in the direction of the busbar 2 by the force of the clamping spring 3. In the closed end position shown, the clamping leg 6 no longer lies on the actuating contour 23, so that the clamping spring 3 can move unimpeded by the actuating lever 19. Thus, an electrical conductor, not shown, inserted into the conductor insertion opening 24 is clamped in an electrically conductive and mechanical manner by the force of the clamping spring 3 with the clamping edge on the free clamping section 7 and the contact edge 13 on the busbar 2, so that an electrical current flows through the electrical conductor and the Busbar 2 can be guided to an adjacent terminal contact.

According to the Figures 1 to 5 The frame parts 8 are each designed in such a way that a wing 30 is only present on one side web 9a. As mentioned, such wings can be present on both side webs 9a, 9b, as follows with reference to the others Figures 6 to 10 is explained. For better visibility of the details associated with the wings 30, the spring-clamp contacts without the clamp springs are shown in these figures. Only in Figure 9 the clamping section 7 is partially shown.

As the Figures 6 to 8 show, each of the mentioned wings 30 can be arranged on the two side webs 9a, 9b of a frame part 8. In particular, they can be arranged symmetrically to one another, so that the space between the wings 30 tapers in the direction of insertion of the conductor L. Can be seen in particular in the Figure 8 that the wings 30 provide a significantly enlarged contact surface 31 for the strands of an electrical stranded conductor.

The Figures 9 and 10 show the spring terminal contact when using an electrical conductor in the form of a stranded conductor 32. The stranded conductor 32 has an outer insulation 33 and strands 34 arranged therein. With a stripped area of the stranded conductor 32, the latter is inserted in the spring terminal contact, in that the clamping leg 7 of the clamping spring presses on the strands 34 from above and presses them against the busbar 2. The relatively flexible strands 34 yield somewhat to this pressure and yield somewhat to the side, so that they are pressed increasingly against the contact surfaces 31 of the wings 30. This is particularly true in the Figure 10 It can be seen from which it can be seen that the individual strands 34 nestle laterally against the wings 30. As a result, the electrical contacting of the strands 34 to the busbar 2 is improved.

The Figures 11 to 14 show the frame part 8 and the busbar 2 of a spring terminal contact of a further embodiment. To clarify the special features, the clamping spring is not shown in this case, but is explained in addition below. The clamping spring can, for. B. similar to in Figure 2 be made recognizable.

The Figure 11 shows a side view of the component shown, the Figure 12 a view correspond to that in Figure 11 shown viewing direction C, the Figure 13 a sectional view of the component according to the in Figure 12 marked cutting plane BB and the Figure 14 a sectional view of the component according to in Figure 11 marked section plane AA.

As in the Figures 11 to 14 It can be seen that the component shown has a frame part 8 which is formed in one piece with the busbar 2, a part of the busbar in particular being able to form the lower crosspiece 11. Together with the side webs 9a, 9b and the upper crossbar 10, a frame part 8 is again formed, through which a conductor lead-through opening 12 is enclosed. On the frame part 8 projecting electrical connection contacts 36 can be arranged, for. B. in the form of contact pins that can be soldered into a circuit board. The frame part 8 in each case has a wing 30 which is formed in one piece and is formed in each of the side webs 9a, 9b. This can be made out by introducing a slot 38 in the respective side web 9a, 9b relative to the plane of the respective side web 9a, 9b, in particular towards the interior of the frame part 8 in which the conductor leadthrough opening 12 is formed. Like especially that Figure 12 shows, a funnel-shaped conductor insertion aid for an electrical conductor inserted in the conductor insertion direction L is formed by the inwardly flared wings 30.

As can be seen, the respective wing 30 is formed in the inner region of a respective side web 9a, 9b, so that there is a slot 38 completely enclosed by the material of the respective side web 9a, 9b.

The in the Figures 11 to 14 Clamping spring, not shown, can rest with its clamping section on the busbar 2 when no conductor is inserted. To attach the clamping spring to the frame part 8, a retaining lug 37 projecting toward the interior of the frame part 8 is formed on the upper crosspiece 10, e.g. B. in Form of an embossing in the material of the frame part 8. The clamping spring can be hung on the holding lug 37 with a correspondingly adapted opening or bore in the contact leg and is thus fixed on the frame part 8.

The Figures 15 to 18 show in comparable representations how Figures 11 to 14 a further embodiment of such a component with a frame part 8 and a busbar 2 formed integrally therewith Figure 15 shows a side view of the component shown, the Figure 16 a view correspond to that in Figure 15 shown viewing direction C, the Figure 17 a sectional view of the component according to the in Figure 16 marked cutting plane BB and the Figure 18 a sectional view of the component according to in Figure 15 marked section plane AA.

In contrast to the embodiment of the Figures 11 to 14 the respective wing 30 is not formed in the inner region of a respective side web 9a, 9b. Instead, each of the side webs 9a, 9b is separated from the material of the respective side web from an end region of the respective side web 9a, 9b by longitudinal slots 39 made in the longitudinal direction, ie in the conductor insertion direction L, so that the respective wing 30 in turn faces the interior of the frame part 8 can be issued such. B. the Figure 16 clarifies.

Claims (16)

1. Spring terminal contact (1) for contact-connection of electrical conductors (32) to at least one busbar (2) and at least one clamping spring (3), which has a resting limb (4), a spring bend (5) adjoining the resting limb (4) and a clamping limb (6) adjoining the spring bend (5), said clamping limb having a clamping section (7) at the free end, and to one or more frame parts (8) extending away from the busbar (2), each frame part having two side webs (9a, 9b) spaced apart from one another and the side webs (9a, 9b) having transverse webs (10, 11) connecting to one another and a conductor passage opening (12) formed by the side webs (9a, 9b) and the transverse webs (10, 11), wherein the at least one clamping spring (3) is secured to the at least one busbar (2) by the resting limb (4) of the clamping spring (3) resting on a transverse web (10, 11) and/or a holding element of the busbar (2) in such a way that the clamping section (7) acts under the spring force of the clamping spring (3) in the direction of the busbar (2), with the result that a clamping point for firmly clamping the electrical conductor (32) is formed between the clamping section (7) and the busbar (2), wherein at least one integrally formed wing (30) is present on at least one of the side webs (9a, 9b), characterized in that the at least one wing (30) forms a side contact surface for the litz wires of the electrical conductor (32) in the form of a litz conductor.
2. Spring terminal contact according to the preceding claim, characterized in that integrally formed wings (30) are present on the two side webs (9a, 9b) of a frame part (8).
3. Spring terminal contact according to the preceding claim, characterized in that the wings (30) of a frame part (8) are arranged substantially symmetrically to one another.
4. Spring terminal contact according to one of the preceding claims, characterized in that the at least one wing (30) points in the direction of a conductor receiving space (35) of the spring terminal contact (1), said conductor receiving space being formed behind the conductor passage opening (12) in the conductor insertion direction (L).
5. Spring terminal contact according to one of the preceding claims, characterized in that the at least one wing (30) is configured as a material region that is angled with respect to the surface of the side web (9a, 9b).
6. Spring terminal contact according to one of the preceding claims, characterized in that the at least one wing (30) extends along the side web (9a, 9b) over at least two thirds of the distance between the transverse webs (10, 11) of the frame part (8).
7. Spring terminal contact according to one of the preceding claims, characterized in that a lead-in chamfer for the electrical conductor (32) to be inserted is formed by the at least one wing (30).
8. Spring terminal contact according to one of the preceding claims, characterized in that at least one of the frame parts (8) is arranged substantially at a right angle to the busbar (2).
9. Spring terminal contact according to one of the preceding claims, characterized in that at least one of the frame parts (8) is formed integrally with the busbar (2).
10. Spring terminal contact according to one of the preceding claims, characterized in that at least one of the frame parts (8) is configured as a frame element that is separate from the busbar (2) and the separate frame element is hooked into the busbar (2).
11. Spring terminal contact according to one of the preceding claims, characterized in that the clamping section (7) is turned away or bent from the section of the clamping limb (6) adjoining the spring bend (5) in the direction of the busbar (2).
12. Spring terminal contact according to one of the preceding claims, characterized in that the clamping section (7) has a smaller width than the other section of the clamping limb (6).
13. Spring terminal contact according to Claim 12, characterized in that at least one region of the section of the clamping limb (6) that is wider with respect to the clamping section (7) and that protrudes laterally relative to the clamping section (7) is provided as an actuation section for opening a clamping point for an electrical conductor (32), said clamping point being formed between the clamping section (7) of the clamping limb (6) and the busbar (2), by way of an actuation element (19, 21, 23) that interacts with the actuation section.
14. Spring terminal contact according to one of the preceding claims, characterized in that adjacent frame parts (8) have an intermediate space (14) between two spaced-apart side webs (9a, 9b) of frame parts (8) arranged next to one another.
15. Conductor connection terminal (16) for electrical conductors, having an insulating material housing (17) and having at least one spring terminal contact (1) according to one of the preceding claims.
16. Method for producing a spring terminal contact (1) for contact-connection of electrical conductors (32) to at least one busbar (2) and at least one clamping spring (3), which has a resting limb (4), a spring bend (5) adjoining the resting limb (4) and a clamping limb (6) adjoining the spring bend (5), said clamping limb having a clamping section (7) at the free end, and to one or more frame parts (8) extending away from the busbar (2), each frame part having two side webs (9a, 9b) spaced apart from one another and the side webs (9a, 9b) having transverse webs (10, 11) connecting to one another and a conductor passage opening (12) formed by the side webs (9a, 9b) and the transverse webs (10, 11), wherein the at least one clamping spring (3) is secured to the at least one busbar (2) by the resting limb (4) of the clamping spring (3) resting on a transverse web (10, 11) and/or a holding element of the busbar (2) in such a way that the clamping section (7) acts under the spring force of the clamping spring (3) in the direction of the busbar (2), with the result that a clamping point for firmly clamping the electrical conductor (32) is formed between the clamping section (7) and the busbar (2), wherein at least one integrally formed wing (30) is present on at least one of the side webs (9a, 9b), the method having the following steps:

    a) providing a sheet-metal part,

    b) reshaping the sheet-metal part in a stamping and bending process in such a way that the busbar (2) having one or more frame parts (8) integrally formed thereon having the respective conductor passage opening (12) is generated, wherein, in said stamping and bending process, the at least one wing (30) on the side web (9a, 9b) or the wings (30) on the side webs (9a, 9b) are formed at the same time, characterized in that the at least one wing (30) forms a side contact surface for the litz wires of the electrical conductor (32) in the form of a litz conductor.

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