CN113574739A

CN113574739A - Connecting terminal

Info

Publication number: CN113574739A
Application number: CN202080020634.7A
Authority: CN
Inventors: 福尔克尔·贾尔姆斯
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2019-03-13
Filing date: 2020-02-06
Publication date: 2021-10-29
Anticipated expiration: 2040-02-06
Also published as: DE102019106351A1; CN113574739B; EP3939121B1; WO2020182380A1; EP3939121A1

Abstract

The invention relates to a connection terminal (100) for connecting electrical conductors (200), comprising a housing (10), a conductor insertion opening (11) formed in the housing (10) for inserting a conductor (200) to be connected into the housing (10), a busbar (12) arranged in the housing (10), a clamping spring (13) arranged in the housing (10) and having a retaining leg (15) and a clamping leg (16), wherein the clamping leg (16) has a clamping edge (31) at a free end, by means of which the conductor (200) to be connected can be clamped relative to the busbar (12), and an actuating element (14) which is mounted in the housing (10) so as to be movable and by means of which the clamping leg (16) can be moved into a clamping position and into an open position, wherein the actuating element (14) has a through-opening (18), through which through-opening (18) at least one partial section of the busbar (12) is guided, and the conductor (200) to be connected can be guided through the through-hole (18), wherein a conductor connection chamber is formed in the through-hole (18), in which conductor connection chamber the conductor (200) to be connected can be clamped with respect to the busbar (12) by means of a clamping leg (16) in the through-hole (18), wherein the through-hole (18) is delimited at least by a top wall (19) and by two side walls (20, 21) arranged perpendicularly to the top wall (19), wherein the two side walls (20, 21) overlap the conductor connection chamber on the side, and wherein openings (23, 24) are formed in the two side walls (20, 21) in each case, in which openings the clamping leg (16) is guided when being transferred into the clamping position and into the open position.

Description

Connecting terminal

Technical Field

The invention relates to a terminal for connecting electrical conductors, comprising a housing, a conductor insertion opening formed in the housing for inserting a conductor to be connected into the housing, a busbar arranged in the housing, a clamping spring arranged in the housing and having a retaining leg and a clamping leg, by means of which the conductor to be connected can be clamped relative to the busbar, and an actuating element movably mounted in the housing, by means of which the clamping leg can be moved into a clamping position and an open position.

Background

In such a terminal, a so-called mis-insertion of the electrical conductor can occur when the electrical conductor to be connected is introduced into the conductor connection space formed between the busbar and the clamping spring. Such a "mis-insertion" is understood to mean that the conductor, which is to be guided in the direction of the conductor insertion direction in the direction of the busbar, is laterally removed from the intended direction of the conductor insertion during insertion and is laterally led out of the conductor connection space. The conductor thus does not occupy its originally intended position in the conductor connection chamber. This is particularly problematic in connection terminals having a housing with open side walls. The risk of incorrect plugging has a negative effect on the operational safety of the terminal, since a reliable contact between the electrical conductor and the busbar cannot be ensured.

Disclosure of Invention

It is therefore an object of the present invention to provide a terminal, which makes it possible to increase the operational safety.

According to the invention, this object is achieved by the features of the independent claims. Advantageous embodiments and advantageous refinements of the invention are specified in the dependent claims.

The connecting terminal according to the invention is characterized in that the actuating element has a through-opening through which at least one partial section of the busbar is guided and through which a conductor to be connected can be guided, wherein a conductor connection chamber is formed in the through-opening, in which clamping of the conductor to be connected relative to the busbar is effected by means of a clamping leg in the through-opening, wherein the through-opening is delimited at least by a top wall and two side walls arranged perpendicularly to the top wall, wherein the two side walls overlap the conductor connection chamber on the side, and wherein an opening is formed in each of the two side walls, in which opening the clamping leg is guided when switching into the clamping position and into the open position.

According to the invention, a conductor connection chamber is formed inside the actuating element, in which a clamping of the conductor relative to the bus bar is realized in order to electrically connect the bus bar, so that the conductor connection is protected by the actuating element or by a wall of the actuating element. For this purpose, the operating element has a through-hole, through which at least a subsection of the busbar is guided, at which subsection the conductor is clamped, and through which the conductor to be connected is also guided. The clamping spring is also positioned such that it projects into the through-opening at least with its clamping leg in the clamping position. The operating element has two side walls which laterally delimit the through-hole and between which a conductor connection chamber is formed. The two side walls are designed to have such a length that they laterally overlap the conductor connection space, so that a conductor can be prevented from being erroneously plugged into the conductor connection space. The side wall thus forms a guide for the conductor when it is inserted into the conductor connection chamber. In order to be able to position the side walls as close as possible on the clamping legs of the clamping spring without the side walls of the actuating element interfering with the movement of the clamping legs, openings are formed in each of the two side walls, in which openings the clamping legs are guided when being transferred into the clamping position and into the open position. The opening in the first side wall is preferably formed parallel to the opening in the second side wall, so that the two openings are arranged opposite one another and symmetrically to one another. The guide of the clamping leg in the opening preferably takes place both when the clamping leg is transferred into the open position and when the clamping leg is transferred into the clamping position. By guiding the clamping legs within the two openings, a very controlled movement of the clamping legs can be achieved by means of the actuating element, as a result of which the operational safety of the connecting terminal can be further increased.

The openings in the two side walls preferably each have the shape of a slot, wherein the openings in the two side walls can extend at an angle of between 30 ° and 60 ° to the operating direction of the operating element. In the case of a slot shape, the opening preferably has an elongated shape, so that the clamping leg can be guided in the opening over as large a portion as possible of its length. By the angular arrangement of the direction of extent of the opening relative to the operating direction of the operating element, a swiveling movement of the clamping leg can be achieved during a purely linear or purely translational movement of the operating element in order to transfer the clamping leg into the clamping position and into the open position. Preferably, the opening extends in both side walls at an angle of between 30 ° and 60 °, preferably at an angle of between 40 ° and 50 °, with respect to the operating direction of the operating element.

Provision is preferably made for a pressure surface to be formed on each of the two side walls, by means of which pressure surfaces a force can be exerted on the clamping legs of the clamping spring by the actuating element when the clamping legs are transferred from the clamping position into the open position. The two pressing surfaces are preferably each formed on an outer edge of the side wall facing in the direction of the clamping spring. Preferably, the two pressure surfaces are designed and arranged at an angle on the actuating element such that in the open position of the clamping leg of the clamping spring the two pressure surfaces bear flatly against the clamping leg or against a longitudinal side of the clamping leg pointing in the direction of the busbar, so that a secure bearing of the pressure surfaces against the clamping leg can be ensured in order to hold the clamping leg in the open position. The two pressing surfaces are preferably formed symmetrically to one another on the two side walls.

The two pressing surfaces are preferably each formed on a respective edge surface of the two side walls which delimits the respective opening. The edge surface is preferably formed on an outer edge of the side wall which points in the direction of the clamping spring. The edge surface on which the pressing surface can be formed is preferably formed at the beginning of the opening, so that the pressing surface preferably does not exert a force in the region of the free end and thus at the clamping edge of the clamping leg, but can exert a force on the clamping leg at the middle along the length of the clamping leg.

The clamping leg preferably has a first counter-pressure surface and a second counter-pressure surface, which can interact with the two pressure surfaces of the actuating element, wherein the first counter-pressure surface can be formed on a first longitudinal side edge of the clamping leg and the second counter-pressure surface can be formed on a second longitudinal side edge of the clamping leg opposite the first longitudinal side edge. The clamping leg therefore preferably has separate counter-pressure surfaces which can interact with pressure surfaces of the actuating element in order to actuate the clamping leg. The counter pressing surfaces preferably project laterally from the clamping leg, so that the counter pressing surfaces form a lateral flap at the clamping leg.

The two counter-pressure surfaces are preferably formed on the clamping leg in such a way that they project through an opening in the side wall. The guide of the clamping leg in the opening can thus take place via two counter-pressing surfaces, so that the remaining part of the clamping leg preferably does not have to be guided in the opening.

In order not to impede the clamping of the conductor by the action of the actuating element on the clamping leg and in particular by the guidance of the clamping leg in the opening of the actuating element, the first counter-pressure surface and the second counter-pressure surface are preferably arranged at a distance from the clamping edge on the longitudinal side edges of the clamping leg. Thus, a misalignment or step is preferably formed between the clamping edge and the two counter-pressing surfaces.

In order to be able to further improve the guidance of the clamping legs during operation by means of the operating element, a driving surface can be formed on the operating element, which can cooperate with the underside of the clamping legs pointing in the direction of the holding legs. In particular, when the clamping legs are transferred from the open position into the clamping position, a force, in particular a pulling force, can be applied to the clamping legs by the actuating element via the carrying surfaces in order to deflect the clamping legs.

The carrying surface is preferably formed opposite the two pressure surfaces. The entraining surface can thus exert a force on the clamping leg which is opposite to the force exerted by the pressing surface.

In order to be able to exert a uniform force on the clamping leg and thus to prevent a lateral tilting of the clamping spring, the entrainment surface can extend over the entire width of the clamping leg of the clamping spring, so that the tensile force exerted by the entrainment surface on the clamping leg can also act over the entire width of the clamping leg.

An extension projection can be formed on each of the two side walls of the operating element, on which extension projection a drive surface can be formed. These extension projections are preferably configured with such a length that they project over the clamping leg in the direction of the holding leg. The elongate projection preferably extends at an angle of between 30 ° and 60 ° relative to the operating direction of the operating element. The extension projections therefore preferably extend parallel to the openings in the side walls, wherein the extension projections can each form an edge surface delimiting the openings.

The elongate projections of the two side walls are preferably formed integrally with one another and they can be molded onto a bottom wall of the operating element, which is arranged opposite the top wall and defines the through-opening. Thus, the two side walls may be connected to each other by the extension protrusion. By providing a bottom wall, the through-hole in the operating element can be closed at least partially on four sides, so that the through-hole can have a rectangular cross section. Thereby, the through hole may be configured in a window shape.

Furthermore, the two side walls can each have a pin-shaped extension, with which the side walls can be passed past the clamping leg laterally to the clamping leg. Preferably, in addition to the respective extension projections, a bolt-shaped extension is formed on the side wall. The bolt-shaped extension preferably extends in the operating direction of the operating element. The pin-shaped extensions are preferably arranged such that they can pass by the clamping legs on their side, where no counter-pressure surfaces are formed at the longitudinal side edges of the clamping legs. The bolt-shaped extension further reduces the risk of a wrong insertion. The pin-shaped extension overlaps the clamping leg laterally, preferably in the vicinity of the connection of the clamping leg to the bending tab of the clamping spring.

For actuating the actuating element, for example by means of a tool, such as a screwdriver, an actuating surface is preferably formed on the outer surface of the top wall facing away from the clamping spring.

Drawings

The invention is explained in detail below according to preferred embodiments with reference to the drawings. Wherein the content of the first and second substances,

figure 1 shows a schematic view of a connection terminal according to the invention,

figure 2 shows a schematic view of the terminal shown in figure 1 with the clamping legs of the clamping spring in the open position,

figure 3 shows a schematic cross-sectional view of the illustration shown in figure 2,

figure 4 shows a schematic view of the connection terminal shown in figure 1 with connected conductors,

figure 5 shows a schematic cross-sectional view of the illustration shown in figure 4,

figure 6 shows a schematic view of a clamping spring,

figure 7 shows a schematic view of the operating elements,

FIG. 8 shows a further schematic view of the operating element shown in FIG. 7, an

Fig. 9 shows a schematic view of the operating element together with the clamping spring.

Detailed Description

Fig. 1 to 5 show a terminal 100 for connecting and electrically contacting an electrical conductor 200.

The connection terminal 100 has a housing 10, which is made of an insulating material. A conductor introduction hole 11 is configured in the housing 10, and a conductor 200 to be connected can be introduced into the housing 10 or an inner space of the housing 10 through the conductor introduction hole 11.

In the housing 10, a bus bar 12, a clamping spring 13 for clamping the conductor 200 to be connected relative to the bus bar 12, and an operating element 14 for operating the clamping spring 13 are arranged.

As shown in fig. 6, the clamping spring 13 has a holding leg 15, a clamping leg 16 and a bending joint 17, by means of which the holding leg 15 and the clamping leg 16 are connected to one another. The holding leg 15 bears in a stationary manner against the busbar 12. The clamping leg 16 can be moved, in particular pivoted, relative to the holding leg 15, so that the clamping leg 16 can be moved into a clamping position, in which the clamping leg 16 presses against the busbar 12 or against the conductor 200 to be connected, and into an open position, as can be seen in fig. 1, 4 and 5, in which the clamping leg 16 is pivoted away from the busbar 12, so that the conductor 200 to be connected can be introduced into or pulled out of the region between the busbar 12 and the clamping spring 13, as can be seen in fig. 2 and 3.

An actuating element 14 is movably arranged in the housing 10, wherein the actuating element 14 can be moved purely linearly or purely translationally in the operating direction B within the housing 10 in order to actuate the clamping spring 13 or the clamping leg 16 of the clamping spring 13. The operating direction B is configured transversely or perpendicularly to the insertion direction E of the conductor 200 into the housing 10 of the connecting terminal 100.

As can be seen in particular in fig. 7, 8 and 9, the actuating element 14 has a through-hole 18, in which a conductor connection chamber is formed for clamping the conductor 200 to be connected against the busbar 12. A subsection of the bus bar 12, on which the conductor 200 to be connected is clamped, extends through the through-hole 18. Furthermore, a conductor 200 to be connected, which is arranged in the housing 10, extends through the through hole 18. Inside the through-hole 18, the clamping leg 16 of the clamping spring 13 clamps the conductor 200 to be connected towards the busbar 12. For this purpose, the clamping legs 16 project into the passage openings 18, as can be seen in fig. 9.

The through-opening 18 is delimited by a top wall 19 of the operating element 14 and two

side walls

20, 21 arranged perpendicularly to the top wall 19. In the solutions shown in fig. 7 to 9, a bottom wall 22 is also provided, which is arranged opposite the top wall 19 and at least partially closes the through opening 18 downward in the direction of the clamping spring 13. The through-hole 18 is delimited upwards by a top wall 19 and the through-hole 18 is delimited laterally by two

side walls

20, 21. The through-opening 18 is therefore delimited on all four sides thereof at least in places by the

walls

19, 20, 21, 22, so that the through-opening 18 is formed window-like in the operating element 14.

In order to be able to insert the clamping leg 16 into the through-opening 18,

openings

23, 24 are formed in each of the two

side walls

20, 21, in which the clamping leg 16 is guided when being transferred into the clamping position and the open position. The two

openings

23, 24 are formed symmetrically to one another in the two

side walls

20, 21. A recess 44 is also formed in the bottom wall 22, through which recess the clamping leg 16 guided in the two

openings

23, 24 passes, as can be seen in fig. 9.

The two

openings

23, 24 have an elongated shape. They are formed in the

side walls

20, 21 in the form of slits. The

openings

23, 24 extend from the edge faces 27, 28 of the

side walls

20, 21 facing the clamping spring 13 into the

side walls

20, 21. The

openings

23, 24 extend at an angle to the operating direction B of the operating element 14. Preferably, the

openings

23, 24 extend at an angle of approximately between 30 ° and 60 ° with respect to the operating direction B of the operating element 14.

In order to be able to apply a pressing force from the actuating element 14 to the clamping leg 16 of the clamping spring 13, pressing

surfaces

25, 26 are formed on the two

side walls

20, 21, respectively. The pressing force exerted by the two

pressing surfaces

25, 26 acts in the direction of the operating direction B. The pressing surfaces 25, 26 are formed on edge surfaces 27, 28 of the

side walls

20, 21, respectively, which edge surfaces point in the direction of the clamping spring 13. As shown, for example, in fig. 2, the

pressing surfaces

25, 26 are designed such that they bear flat against the clamping leg 16 in the open position in order to hold the clamping leg in the open position. The pressing surfaces 25, 26 are arranged obliquely to the operating direction B at an angle of between 30 ° and 60 ° like the

openings

23, 24.

The pressing surfaces 25, 26 are formed on edge surfaces 27, 28 of the

side walls

20, 21 that delimit the

respective opening

23, 24.

As can be seen in particular in fig. 6, the clamping leg 16 of the clamping spring 13 has

counter-pressure surfaces

29, 30 which interact with the pressure surfaces 25, 26 of the

side walls

20, 21 of the actuating element 14. The two

counter pressing surfaces

29, 30 are formed on two opposite longitudinal side edges 42, 43 of the clamping leg 16, so that the two

counter pressing surfaces

29, 30 form a widening of the clamping leg 16. The

counter pressing surfaces

29, 30 are formed in one plane with the rest of the clamping leg 16. The counter-pressure surfaces 29, 30 form a lateral airfoil surface on the clamping leg 16. In the open position of the clamping leg 16, the

pressing surfaces

25, 26 bear flat against the counter-pressing surfaces 29, 30.

The

counter pressing surfaces

29, 30 are configured with such a width that they project through the

openings

23, 24 in the

side walls

20, 21 of the operating element 14. The clamping leg 16 preferably projects into the

opening

23, 24 with only two

counter-pressure surfaces

29, 30. The guidance of the clamping leg 16 in the

opening

23, 24 is therefore preferably achieved by means of the

counter-pressure surfaces

29, 30 of the clamping leg 16.

The

counter pressing surfaces

29, 30 are formed on the clamping leg 16 in such a way that they are arranged at a distance from the clamping edge 31 of the clamping leg 16, so that the

counter pressing surfaces

29, 30 are not formed at a height from the clamping edge 31. Thus, a misalignment or step is formed between the clamping edge 31 and the

counter-pressure surfaces

29, 30.

In addition to the

pressing surfaces

25, 26, a driving surface 32 is formed on the operating element 14, which can apply a force to the clamping leg 16 opposite the operating direction B. The force exerted by the entraining surface can thus act as a pulling force, so that the clamping legs 16 are guided together with the movement from the open position into the clamping position. The driving surface 32 interacts for this purpose with the underside 33 of the clamping leg 16, which is oriented in the direction of the retaining leg 15.

The driving surface 32 is formed opposite the two

pressing surfaces

25, 26. The driving surface 32 forms the boundary of the

openings

23, 24. On the two

side walls

20, 21 of the operating element 14, in each case an

extension projection

34, 35 is formed, on which the drive surface 32 is formed. The

extension projections

34, 35 are configured to have such a length that they project beyond the clamping leg 16 in the direction of the holding leg 15. The

elongate projections

34, 35 extend at an angle of between 30 ° and 60 ° relative to the operating direction B of the operating element 14.

As can be seen in fig. 7, the driver surface 32 extends over the entire width of the clamping leg 16 of the clamping spring 13. For this purpose, the two

side walls

20, 21 are formed integrally with one another in the region of the

extension projections

34, 35. Whereby the driving surface 32 is co-molded with the bottom wall 22 and extends over the width of the bottom wall 22.

The two

side walls

20, 21 also each have a pin-shaped

extension

36, 37, with which the

side walls

20, 21 can be guided past the clamping leg 16 on the side of the clamping leg 16.

In addition to the

respective extension projections

34, 35, bolt-shaped

extensions

36, 37 are also formed on the

side walls

20, 21. The bolt-shaped

extensions

36, 37 extend in the operating direction B of the operating element 14. The pin-shaped

extensions

36, 37 are arranged in such a way that they are guided past the clamping leg 16 on the side of the clamping leg 16, where the

counter-pressure surfaces

29, 30 are not formed at the longitudinal side edges 31, 32 of the clamping leg 16. The bolt-shaped

extensions

36, 37 laterally overlap the clamping leg 16 in the vicinity of the location where the clamping leg 16 is connected to the bent tab 17 of the clamping spring 13.

For actuating the actuating element 14, for example by means of a tool, such as a screwdriver, an actuating surface 39 is formed on an outer surface 38 of the top wall 19 which is directed away from the clamping spring 13.

Furthermore, a guide element 40 is formed on the actuating element 14, by means of which the actuating element 14 is guided in a groove 41 formed in the housing 10. The guide element 40 is configured here in the form of a tab or a pin and projects into the groove 41. The guide element 40 is formed on the actuating element 14 in the region of the top wall 19. The guide member 40 is positioned in the housing 10 parallel to the conductor introduction hole 11. The slot 41 extends in the operating direction B of the operating element 14.

Description of the reference numerals

100 terminal

10 casing

11 conductor lead-in hole

12 bus bar

13 clamping spring

14 operating element

15 holding leg

16 clamping leg

17 bending joint

18 through hole

19 top wall

20 side wall

21 side wall

22 bottom wall

23 opening

24 opening

25 extrusion surface

26 extrusion surface

27 edge surface

28 edge surface

29 mating extrusion faces

30 paired extrusion surfaces

31 clamping edge

32 running surface

33 lower side

34 extended projection

35 extension projection

36-pin extension

37 bolt-shaped extension

38 outer surface

39 operating surface

40 guide element

41 groove

42 longitudinal side edge

43 longitudinal side edge

44 gap

200 conductor

B direction of operation

E direction of introduction

Claims

1. A connecting terminal (100) for connecting an electrical conductor (200) has

A shell (10) which is provided with a plurality of grooves,

a conductor introduction hole (11) formed in the housing (10) for introducing a conductor (200) to be connected into the housing (10),

a bus bar (12) arranged in the housing (10),

a clamping spring (13) arranged in the housing (10) and having a retaining leg (15) and a clamping leg (16), wherein the clamping leg (16) has a clamping edge (31) at the free end, by means of which a conductor (200) to be connected can be clamped against the busbar (12), and

an operating element (14) which is mounted in the housing (10) so as to be movable and by means of which the clamping leg (16) can be moved into a clamping position and into an open position,

characterized in that the operating element (14) has a through-opening (18), through which through-opening (18) at least one subsection of the bus bar (12) is guided, and through which through-opening (18) a conductor (200) to be connected can be guided, wherein a conductor connection chamber is formed in the through-opening (18), in which a conductor (200) to be connected is clamped against the busbar (12) by means of a clamping leg (16) in the through-opening (18), wherein the through-hole (18) is delimited at least by a top wall (19) and by two side walls (20, 21) arranged perpendicularly to the top wall (19), wherein the two side walls (20, 21) overlap the conductor connection chamber on the side and wherein openings (23, 24) are formed in the two side walls (20, 21) in which the clamping legs (16) are guided when being transferred into the clamping position and into the open position.

2. The connection terminal (100) according to claim 1, characterised in that the openings (23, 24) in the two side walls (20, 21) each have a slot shape, wherein the openings (23, 24) in the two side walls (20, 21) extend at an angle of 30 ° to 60 ° to the operating direction (B) of the operating element (14).

3. The connecting terminal (100) according to claim 1 or 2, characterised in that a pressing surface (25, 26) is formed on each of the two side walls (20, 21), by means of which a force can be exerted on the clamping leg (16) from the actuating element (14) when the clamping leg (16) is transferred from the clamping position into the open position.

4. The connection terminal (100) according to claim 3, characterised in that the two pressing surfaces (25, 26) are formed on edge surfaces (27, 28) of the two side walls (20, 21) which delimit the respective opening (23, 24).

5. A terminal (100) according to claim 3 or 4, wherein the clamping leg (16) has a first counter-pressing surface (29, 30) and a second counter-pressing surface (29, 30) which interact with the two pressing surfaces (25, 26) of the actuating element (14), wherein the first counter-pressing surface (29, 30) is formed on a first longitudinal side edge (42, 43) of the clamping leg (16) and the second counter-pressing surface (29, 30) is formed on a second longitudinal side edge (42, 43) of the clamping leg (16) opposite the first longitudinal side edge (42, 43).

6. A terminal (100) according to claim 5, characterised in that the two counter-pressing surfaces (29, 30) protrude through openings (23, 24) in the side walls (20, 21).

7. A terminal (100) according to claim 5 or 6, wherein the first counter-pressing surface (29, 30) and the second counter-pressing surface (29, 30) are arranged at a distance from the clamping edge (31) on a longitudinal side edge (42, 43) of the clamping leg (16).

8. A connection terminal (100) according to one of claims 1 to 7, characterised in that a drive surface (32) is formed on the operating element (14), which drive surface interacts with a lower side (33) of the clamping leg (16) which is directed in the direction of the retaining leg (15).

9. A terminal (100) according to claim 8, characterised in that the drive surface (32) is configured opposite the two pressing surfaces (25, 26).

10. A terminal (100) according to claim 8 or 9, characterised in that the driving surface (32) extends over the entire width of the clamping leg (16) of the clamping spring (16).

11. A terminal (100) according to one of claims 8 to 10, characterised in that an extension projection (34, 35) is formed on each of the two side walls (20, 21), on which extension projection the drive surface (32) is formed.

12. The connection terminal (100) according to claim 11, characterized in that the extension projections (34, 35) of the two side walls (20, 21) are configured in one piece with one another and are molded on a bottom wall (22) of the operating element (14) which is arranged opposite the top wall (19) and which delimits the through-opening (18).

13. The connection terminal (100) according to one of claims 1 to 12, characterised in that the two side walls (20, 21) each have a bolt-shaped extension (36, 37) with which the side walls (20, 21) can be guided past the clamping leg (16) on the side of the clamping leg (16).

14. The terminal (100) according to one of claims 1 to 13, characterized in that an actuating surface (39) for actuating the actuating element (14) is formed on an outer surface (38) of the top wall (19) which is directed away from the clamping spring (13).