CN116937193A

CN116937193A - Connecting terminal

Info

Publication number: CN116937193A
Application number: CN202310419728.7A
Authority: CN
Inventors: 卡斯滕·路德维希; 亚历山大·沃克曼
Original assignee: Wago Verwaltungs GmbH
Current assignee: Wago Verwaltungs GmbH
Priority date: 2022-04-22
Filing date: 2023-04-19
Publication date: 2023-10-24
Also published as: DE202022102162U1; DE102023109851A1

Abstract

The invention relates to a connection terminal having a spring force clamping connection terminal for clamping an electrical conductor by means of a spring force, wherein the spring force clamping connection terminal has a clamping spring having a clamping leg for clamping the electrical conductor at a clamping point, a spring bow, and a contact leg for fastening and supporting the clamping spring relative to a clamping force exerted by the clamping leg on the electrical conductor, wherein the clamping leg is connected to the contact leg via the spring bow, wherein the clamping spring has an actuating region for opening the clamping point, wherein the actuating region is configured for deflecting the clamping leg by manual actuation of the actuating region, wherein the clamping leg extends in a longitudinal direction from the spring bow up to a free end of the clamping spring, and wherein the actuating region is arranged eccentrically relative to the clamping leg in a width direction of the clamping leg, which is orthogonal to the longitudinal direction.

Description

Connecting terminal

Technical Field

The invention relates to a connection terminal having a spring force clamping connection terminal for clamping an electrical conductor by means of a spring force, wherein the spring force clamping connection terminal has a clamping spring having a clamping leg for clamping the electrical conductor at a clamping point, a spring bow, and an abutment leg for fastening and supporting the clamping spring relative to a clamping force applied to the electrical conductor by the clamping leg, wherein the clamping leg is connected to the abutment leg via the spring bow, wherein the clamping spring has an actuating region for opening the clamping point, wherein the actuating region is configured for deflecting the clamping leg by manual actuation of the actuating region, wherein the clamping leg extends in a longitudinal direction from the spring bow up to a free end of the clamping spring, and wherein the actuating region is arranged eccentrically relative to the clamping leg in a width direction of the clamping leg, which is orthogonal to the longitudinal direction.

Background

Such clamping springs with asymmetric manipulation are used, for example, in the applicant's family 750 of I/O modules. The asymmetrical actuation can cause torsion of the components of the clamping spring, which can lead to an inclined state of the clamping section of the clamping leg.

Disclosure of Invention

The invention is based on the object of providing an improved connection terminal in which the above-mentioned effects are minimized.

The object is achieved in a connecting terminal of the type mentioned at the beginning in that: the spring bow has a recess on one of its edge sides. On the edge side, the clamping leg and/or the abutment leg extend beyond the spring bow in the width direction. The edge or edge of the spring bow is thus at least partially recessed in the width direction relative to the edge or edge of the contact leg and/or the clamping leg toward the opposite edge or edge.

The invention has the following advantages: the influence of the asymmetrical actuation is minimized by the recess in the spring bow, and when the clamping leg is deflected by the manual actuation region for opening the clamping point, a largely symmetrical deformation of the clamping spring is caused by the structural design of the clamping spring, despite the asymmetrical actuation. In this case, the advantages of an asymmetrical actuation of the clamping spring, such as a particularly compact design of the connecting terminal, can be retained. In particular, a particularly compact design of the terminal module with a plurality of individual spring-grip connection terminals arranged next to one another is possible, since the available installation space can be optimally utilized.

In particular, an almost force balance can be established by the recess in the spring bow when the clamping spring is actuated. Torsion of the clamping spring, in particular the tilting state of the clamping leg, is largely avoided. This allows safe insertion and removal of electrical conductors, in particular of the connection sleeve and of the conductor and core wire end sleeve having a large conductor cross section, since the cross section of the conductor insertion channel of the housing for the insertion or removal of the conductor, for example, is at least almost completely released and is not limited by the obliquely placed clamping legs.

The recess can be formed as an edge-side recess, i.e. a laterally concave projection on the clamping spring. In particular, the center of the actuating region can be arranged offset from the center of the clamping leg in the width direction. In particular, only a single-sided actuating region can be present on the clamping leg. The spring bow may have a recess on only one of its edge sides. The recess may have a maximum depth in the range of more than 10% or more than 20% of the maximum width of the clamping spring.

The deformation of the clamping spring can take place mainly in the spring bow when the clamping legs are deflected for opening the clamping points. The actuating region is preferably not formed at the spring bow, but in the part of the clamping spring with the clamping legs. The actuating region may have a distance from the spring bow in the longitudinal direction. The actuating region can be embodied in particular as a region of the clamping leg which is provided for actuating.

According to an advantageous embodiment of the invention, it is provided that the recess is provided on the edge side of the spring bow which is further from the actuating region. In relation to the two edge sides of the spring bow or of the clamping spring facing away from each other, the recess is thus provided on the edge side having a greater distance from the actuating region. In this way, the recess is spaced relatively far from the handling area. This allows torsion of the clamping spring and the associated tilting of the clamping leg to be avoided particularly effectively.

According to an advantageous embodiment of the invention, it is provided that the clamping leg has a clamping section at the free end in the longitudinal direction for clamping the electrical conductor. This allows the electrical conductors to be securely clamped. The clamping section may, for example, have a clamping edge which can be slightly inserted into the electrical line when the electrical line is clamped. As a further part of the contact insert, i.e. in addition to the clamping spring, the connection terminal can have a busbar against which the electrical conductors are clamped by means of the clamping section. The clamping point is then formed between the clamping section and a part of the busbar.

The clamping leg can thus extend in its longitudinal direction from the spring bow up to the free end of the clamping leg of the clamping spring, for example up to the clamping section.

According to an advantageous embodiment of the invention, it is provided that the actuating region is arranged laterally next to the clamping section in the width direction. In this way, the clamping spring can be constructed particularly compactly and in a space-saving manner. Furthermore, the clamping leg can be actuated particularly effectively by manual application of the actuating region, since the forces introduced by manual actuation can act next to the clamping section.

According to an advantageous embodiment of the invention, it is provided that the clamping section extends in the width direction up to the lateral edges of the clamping leg. In this way, a clamping section that is as wide as possible is provided, so that an electrical line having a relatively large cross section can also be clamped. The clamping section can directly adjoin the actuating region in the width direction. The actuating region can extend in the width direction up to opposite lateral edges, i.e. lateral edges facing away from the clamping section.

For example, the recess may be provided only in the spring bow. According to an advantageous embodiment of the invention, it is provided that the recess extends up to the region of the abutment leg and/or the clamping leg adjoining the spring bow. In this way, the recess also extends into other regions of the clamping spring. This has the following advantages: the recess can be converted into a portion of the clamping spring, in which the recess is not present, by a uniform, gentle transition.

According to an advantageous embodiment of the invention, it is provided that the spring bow has a convex projection protruding in the width direction on the edge side facing away from the edge side of the recess. This has the following advantages: the weakening of the clamping spring by the recess can be at least partially compensated for by the projection. The projection may be present only in the region of the spring bow, i.e. only the bending region of the spring bow protrudes in the width direction and extends beyond the edge of the clamping leg and/or the abutment leg. The projection can also extend as far as into the region of the abutment leg and/or the clamping leg adjoining the spring bow.

According to an advantageous embodiment of the invention, it is provided that the projection extends in the width direction beyond the edge of the clamping leg and/or of at least a part of the abutment leg. The projection can extend in the width direction beyond the edge of the clamping leg and/or against the leg in the following dimensions: the dimension is at least 5% or at least 10% of the maximum width of the clamping spring.

The manual actuation of the actuation region of the clamping leg can be performed by means of an external tool which is not part of the connection terminal, for example by means of a screwdriver.

According to an advantageous embodiment of the invention, it is provided that the connection terminal has a manual actuating element by means of which the clamping leg can be deflected by actuating it in the actuating region for opening the clamping point. This has the following advantages: the connection terminal itself already has such an actuating element, so that a manual actuation of the clamping leg is possible in a simple and safe manner, for which no external tools are necessary. In an advantageous embodiment of the invention, the manual actuating element is designed and arranged such that, when the manual actuating element is actuated, it acts on the actuating region of the clamping spring at an action point which is arranged eccentrically to the clamping leg in the width direction of the clamping leg. The asymmetric actuation mentioned at the beginning is thus achieved by the actuating element. In the actual embodiment of the connection terminal, the aforementioned points of action are generally not points in the mathematical sense, but rather locally limited partial areas of the actuating area. In the sense of the present description, the center of gravity of the partial region is regarded as the point of action on which the actuating element acts at the actuating region or with which the actuating element interacts at the actuating region.

According to one advantageous embodiment of the invention, it is provided that the actuating region can be acted upon by the actuating element at least one point of action which is arranged centrally with respect to the spring bracket in the width direction with respect to the narrowest point of the spring bracket. In this way, undesired torsion and tilting states of the clamping legs are largely minimized. This is possible by means of lateral recesses in the spring bow, through which recesses the spring bow is again oriented centrally with respect to the point of application at the narrowest point.

The above-mentioned embodiments of the invention are also advantageously suitable for connection terminals in which the actuation of the clamping spring is carried out by means of an external actuating element, for example a screwdriver, which is not part of the connection terminal. In order to be able to guide the actuating element specifically to the point of action, the connection terminal can then, for example, have an actuating channel formed in the insulating material housing, through which the actuating element is guided at least approximately to the point of action.

According to an advantageous embodiment of the invention, it is provided that the actuating element is mounted and guided so as to be movable in the movement plane, wherein the actuating element has an actuating projection extending transversely to the movement plane and/or in the width direction, which is configured to act on the actuating region when the actuating element is manually actuated. The design of the connection terminal of small design is thereby also facilitated, since the actuating element can be arranged laterally next to the clamping spring in a space-saving manner and the clamping spring can be actuated reliably via the laterally projecting actuating projection.

The actuating element can have only one-sided projecting actuating projections, so that it is configured asymmetrically with respect to the movement plane. For example, the actuating element can have a main body on which a manual actuating section is present on the side of the connection terminal that is accessible to the user, at which the user can apply an actuating force to the actuating element. The actuating projection can be arranged at a point of the body spaced apart from the actuating section and can project laterally therefrom, i.e. transversely to the actuating plane.

The terminal may have a housing. The actuating element can then be supported and guided on a part of the housing. Alternatively or additionally, the actuating element can also be supported and guided on the part of the connection terminal that contacts the insert, for example on the busbar and/or the clamping spring. The housing may have a wire introduction channel for the defined introduction of the electrical wire up to the clamping point. The wire introduction direction, in which the electrical wires are introduced into the housing, is defined by a wire introduction channel, for example a central axis of the wire introduction channel. For example, the wire insertion direction can be oriented parallel to a movement plane in which the actuating element is mounted and guided in a movable manner.

The actuating element can be configured as a pivotable actuating lever. In this case, the movement plane is the pivot plane of the actuating lever. The actuating element can also be formed as a pivotable pressure piece. In this case, the movement plane is defined by the movement direction of the pressing piece and the guide channel guiding the pressing piece.

According to one advantageous embodiment of the invention, it is provided that the surface of the other part of the actuating element and/or of the actuating projection, which surface is oriented toward the edge side of the clamping spring, extends obliquely, i.e. at an oblique angle, relative to the plane of movement, wherein the recess in the spring bow is provided on said edge side. In this way, the actuating element can be designed to be relatively narrow, but it is also possible to arrange the introduction of the actuating force as far as possible onto the actuating region relative to the center of the clamping spring. This also reduces the inclination with respect to the torsion of the clamping spring during actuation. Furthermore, the actuating element can be arranged in a space-saving manner. The entire surface oriented toward the edge side of the clamping spring does not necessarily have to have the described oblique arrangement, but at least a partial region of the surface spaced apart from the edge of the actuating projection, i.e. not just the possible chamfer at the edge.

For example, there may additionally be a surface on the body that is disposed at an oblique angle. Here, the surfaces of the body and the actuating projection, which are arranged at an oblique angle, can extend, for example, parallel to one another. The surface extending at an oblique angle relative to the plane of motion may be a flat surface or a curved surface, such as a concave curved surface. The inclination angle may be in the range of 10 ° to 40 °.

The spring bow extends over an angular range of at least 45 °, or at least 120 °, or at least 150 °, or at least 170 °. The deformation of the clamping spring which occurs in this case is mainly effected by the spring bow when the clamping spring is actuated for opening the clamping point.

The clamping leg may extend beyond the abutment leg in the width direction at one or both edge sides. In particular, the clamping section can extend in the width direction beyond the abutment leg. The handling area may extend beyond the abutment leg in the width direction.

The clamping leg may have a curved contour in the longitudinal section, for example a curved region, which is arranged away from the free end of the clamping leg in the longitudinal direction in the range of 30% to 70% of the length of the clamping leg. The bending region may be bent in a bending direction opposite to the spring bow. The bending region may extend over an angular range of more than 30 ° and/or less than 90 °.

In the sense of the present invention, the indefinite article "a" is not to be understood as a number. Thus, if, for example, a component is referred to, this should be interpreted as "at least one component". As long as the angular specification is made in degrees, the angular specification relates to a circular size of 360 degrees (360 °).

Drawings

The invention is described in detail below with reference to the accompanying drawings according to embodiments.

The drawings show:

figure 1 shows in perspective view the actuating element and the contact insert of the terminal,

figure 2 shows a clamping spring according to the operating element and the contact insert of figure 1,

figure 3 shows the contact insert according to figure 1 in a side view,

figure 4 shows a lateral cross-sectional view of a terminal comprising a contact insert according to figure 1,

figures 5 and 6 show a first embodiment of the clamping spring in different perspective views,

fig. 7 and 8 show a second embodiment of the clamping spring in different perspective views.

Detailed Description

Fig. 1 shows the contact inserts 3, 4 and the actuating element 5 as parts of the connection terminal, which is in the form of a pressing element mounted in a substantially linearly movable manner. The contact inserts 3, 4 have a busbar 3 and a clamping spring 4.

The clamping spring 4 has a clamping leg 43, a spring bow 42 and an abutment leg 41. The clamping legs 43 serve to clamp the electrical conductor at the clamping location. In this case, the clamping point is formed by the free ends of the clamping legs 43 engaging the wire support section 30 of the busbar 3. The electrical conductor, not shown, is pressed against the conductor support section 30 by the clamping leg 43 and clamped there.

The clamping leg 43 is connected to the abutment leg 41 via a spring bow 42. The abutment leg 41 serves for fastening the clamping spring 4 and for supporting the clamping spring 4 against a clamping force exerted by the clamping leg 43 on the electrical conductor. For example, the contact leg 41 may have a fastening element 40, for example a tab extending in the longitudinal direction, with which the contact leg 41 is fastened to a part of the busbar 3.

An actuating region 46 is provided on the clamping leg 43, which actuating region serves to deflect the clamping leg 43 by manual actuation of the actuating region 46 in order to open the clamping point. The clamping leg 43 is removed from the conductor support section 30 of the busbar 3, so that the electrical conductor can be removed therefrom or can be placed there without the exertion of force. The deformation of the clamping spring 4 which occurs with the described deflection of the clamping leg 43 is mainly effected by the spring bow 42. As can be seen, the clamping leg 43 itself may also have a curvature, for example, in the curvature region 47. However, the bending region 47 does not form a spring bow for the clamping spring 4, in particular the bending region 47 does not take on the main deformation of the clamping spring when the clamping leg 43 is deflected. The bending region 47 may bend in a bending direction opposite to the spring bow 42.

The clamping leg 43 extends in the longitudinal direction L from the spring bow 42 up to a free end on the clamping leg 43 of the clamping spring 4. The actuating region 46 is arranged eccentrically on the clamping leg 43 in a width direction B of the clamping leg 43, which is orthogonal to the longitudinal direction L. The clamping leg 43 has a clamping section 44 at the free end in the longitudinal direction L for loading the electrical conductor in a clamping manner. The clamping section 44 thus forms a clamping region of the clamping spring 4. It can be seen that the actuating region 46 is arranged laterally on the clamping leg 43, i.e. not centrally in the width direction, but slightly eccentrically laterally beside the clamping section 44. As a result, an asymmetrical force loading of the clamping leg 43 is achieved when actuated by the actuating element 5.

The clamping spring 4 has an edge side R1 which can be seen in fig. 1 and an opposite edge side R2 which is provided in a covering manner in fig. 1 as a result of the illustration (see fig. 5 to 8). In such a clamping spring 4, the clamping leg 43 is generally made to transition to the spring bow 42 at the edge side R1 in a uniform transition, i.e. without depressions or projections. Likewise, the spring bow 42 generally transitions into abutment with the leg 41 at the edge side R1 in a manner that is free of depressions or projections. In contrast, in the connection terminal according to the invention, it is proposed that the spring bow 42 has a recess 45 on one of its edge sides (here edge side R1), at which recess the clamping leg 43 and/or the abutment leg 41 extend beyond the spring bow 42 in the width direction B. Thus, the advantages of the invention set forth in the beginning may be realized.

The actuating element 5 has a main body 51 on which a manual actuating section 50 can be provided at a region accessible to the user, for example at one end, at which the user can apply actuating forces to the actuating element 5. On the body 51, on the side oriented toward the recess 45, an actuating projection 52 is also provided, which projects transversely to the actuating direction D of the actuating element 5 and is used to apply the actuating region 46 in the event of manual actuation of the actuating element 5.

For a defined guidance and for limiting the play of movement of the actuating element 5, the latter can, for example, have lateral guide surfaces 56 for guiding during a displacement movement of the actuating element 5. For example, the lateral guide surface 56 may be guided along a portion of the busbar 3 or along a portion of the housing of the terminal. In addition, a depth stop 55 for limiting the maximum actuating travel can be formed on the actuating element 5. For example, the depth stop 55 can abut against a part of the housing of the terminal or a part of the contact insert 3, 4, for example the busbar 3, when the maximum actuating travel is reached.

In one advantageous embodiment, the surface 53 of the actuating projection 52, which is oriented toward the edge side R1 of the clamping spring 4, i.e. the side of the recess 45 in the spring bracket 42, or the other surface 54 of the body 51, which is oriented in this direction, can be arranged obliquely to the actuating direction D of the actuating element 5. This can also be seen more clearly in fig. 4, for example.

For a better illustration of the elements of the clamping spring 4, fig. 2 shows the arrangement according to fig. 1 without the busbar 3.

Fig. 3 shows the arrangement according to fig. 1 in a side view. For example, it can be clearly seen that the abutment leg 41 is fastened to a portion of the busbar 3 by means of the fixing element 40. The busbar 3 can have, for example, a recess in the form of a slot, for example.

Fig. 4 shows a connection terminal 1 with a housing 2. An arrangement of contact inserts 3, 4 and actuating elements 5 according to fig. 1 is provided in the housing 2. The housing 2 has a wire introduction passage 20. The electrical conductor to be clamped at the clamping point must be introduced in the conductor introduction direction E through the conductor introduction channel 20 and guided in a targeted manner to the clamping point in this way. The housing 2 further has a press guide channel 21 in which the actuating element 5 is arranged and mounted so as to be movable in the actuating direction D.

It can be seen that the surfaces 53, 54 of the actuating element 5 extend at an oblique angle to the wire introduction direction E. The actuating element 5 can thus be constructed in a relatively narrow manner and can accordingly be accommodated in the housing 2 in a space-saving manner. By virtue of the inclined state of at least the actuating projection 52, the introduction of the actuating force can additionally be arranged as far as possible with respect to the center of the clamping spring, i.e. the point of action of the actuating element 5 on the actuating region 46 of the clamping spring 4 can be arranged centrally with respect to the narrowest point of the spring bow 42, at least with respect to the spring bow 42. The wire insertion direction E can run parallel to the actuating direction D of the actuating element 5.

Fig. 5 and 6 show an embodiment of a clamping spring 4 which can be used for the connection terminal 1 described above. In the illustrated embodiment, the clamping spring 4 has a recess 45 on the spring bracket 42, which is limited in terms of its dimensions to the spring bracket 42 and does not extend or, if appropriate, only significantly into the clamping leg 43 and the contact leg 41. It can also be seen that the clamping spring 4 extends without a projection or recess, i.e. extends essentially straight, on the edge side R2 facing away from the recess 45 in the region of the clamping leg 43, in the region of the spring bow 42 and in the region of the abutment leg 41 adjoining it.

Fig. 7 and 8 show an embodiment of a clamping spring 4 which can likewise be used for the connection terminal 1. In contrast to the embodiment of fig. 5 and 6, it is shown here that the recess 45 can also extend beyond the spring bow 42, in particular into the clamping leg 43 and the abutment leg 41. In addition, in order to compensate for the weakening of the spring bow 42 by the recess 45, a convex projection 48 extending in the width direction B may be provided on the opposite edge side R2. The projection 48 thus extends in the width direction beyond the edge of the clamping leg 43 and/or at least of a part of the abutment leg 41 on the edge side R2.

List of reference numerals

1. Connecting terminal

2. Shell body

3. Bus bar

4. Clamping spring

5. Actuating element

20. Guide wire introduction channel

21. Press piece guide channel

30. Wire support section

40. Fixing element

41. Leaning leg

42. Spring bow

43. Clamping leg

44. Clamping section

45. Blank part

46. Manipulation area

47. Bending region

48. Convex protrusion

50. Manually operated section

51. Main body

52. Manipulation protrusion

53. Surface of main body

54. Surface of manipulation protrusion

55. Depth stop

56. Lateral guide surface

L longitudinal direction

B width direction

E lead-in direction

D steering direction

R1 edge side

R2 edge side

Claims

1. A connection terminal (1) having a spring-force clamping connection terminal for clamping an electrical conductor by means of a spring force, wherein the spring-force clamping connection terminal has a clamping spring (4) having a clamping leg (43) for clamping an electrical conductor at a clamping point, a spring bow (42) and an abutment leg (41) for supporting the clamping spring (4) relative to the clamping leg (43), wherein the clamping leg (43) is connected to the abutment leg (41) via the spring bow (42), wherein the clamping spring (4) has a handling region (46) for opening the clamping point, which is configured for deflecting the clamping leg (43) by actuating the handling region (46), wherein the clamping leg (43) extends in a longitudinal direction (L) from the spring bow (42) up to a free end of the clamping spring (4), and wherein the handling region (46) is arranged on a width direction (B) of the clamping leg (43) orthogonal to the longitudinal direction (L) relative to the clamping leg (4) on at least one of the sides (R) lying on the clamping leg (43) and/or on the clamping leg (1) side (R) is offset to the clamping leg (4) side (1), r2) extends beyond the spring bow (42) in the width direction (B).

2. The connection terminal according to claim 1, characterized in that the spring bow (42) has a recess (45) on only one of its edge sides (R1, R2).

3. Terminal according to any of the preceding claims, wherein the recess (45) is provided on an edge side (R1, R2) of the spring bow (42) which is further from the actuating region (46).

4. Terminal according to any of the preceding claims, wherein the clamping leg (43) has a clamping section (44) at a free end in the longitudinal direction for loading an electrical conductor in a clamping manner.

5. Terminal according to claim 4, characterized in that the actuating region (46) is arranged laterally next to the clamping section (44) in the width direction (B).

6. Terminal according to claim 4 or 5, characterized in that the clamping section (44) extends in the width direction (B) up to the lateral edge of the clamping leg (43).

7. Terminal according to any of the preceding claims, wherein the recess (45) extends up to the abutment leg (41) and/or to a region of the clamping leg (43) adjoining the spring bow (42).

8. Terminal according to any of the preceding claims, wherein the spring bow (42) has a convex projection (48) protruding in the width direction (B) on an edge side (R2) facing away from the edge side (R1) of the recess (45).

9. Terminal according to claim 8, characterized in that the projection (48) extends beyond the edge of at least a part of the clamping leg (43) and/or the abutment leg (41) in the width direction (B).

10. Terminal according to any of the preceding claims, characterized in that the terminal (1) has a manual actuating element (5) by means of which the clamping leg (43) can be deflected by means of actuation at the actuating region (46) for opening the clamping point.

11. Terminal according to claim 10, characterized in that the actuating region (46) can be acted upon by an actuating element (5) at least one point of action which is arranged centrally with respect to the spring bow (42) in the width direction (B) with respect to the narrowest point of the spring bow (42).

12. Terminal according to any one of claims 10 to 11, characterized in that the actuating element (5) is mounted and guided movably in a movement plane, wherein the actuating element (5) has an actuating projection (52) extending transversely to the movement plane and/or in the width direction, which is configured for loading the actuating region (46) when the actuating element (5) is manually actuated.

13. Terminal according to claim 12, characterized in that the surface (53, 54) of the other part of the actuating element (5) and/or of the actuating projection (52) oriented toward the edge side (R1, R2) of the clamping spring (43), on which the recess (45) in the spring bow (42) is arranged, extends obliquely to the plane of movement.

14. Terminal according to any of claims 10 to 13, characterized in that it has as actuating element (5) a lever and/or a pressing element arranged and/or supported in the housing, which lever and/or pressing element has an actuating section for manually actuating the actuating region (46).

15. Terminal according to any of the preceding claims, characterized in that the actuating region (46) is formed eccentrically in the width direction (B) with respect to the clamping leg (43), and in that the actuating region (46) is formed on only one side of the clamping leg (43).

16. Terminal according to any of the preceding claims, wherein the recess (45) has a depth of at least 5%, in particular at least 10%, in particular at least 15% of the width of the clamping leg (43) in the width direction (B).

17. A terminal according to any of the preceding claims, wherein the spring bow extends over an angular range of at least 45 °, in particular at least 120 °, in particular at least 170 °.

18. Terminal according to any of the preceding claims, wherein the recess (45) extends over at least a part of the curvature of the spring bow (42), or over the entire spring bow (42), or such that the recess section extends beyond at least a part of the curvature of the spring bow (42) into the abutment leg (41) and/or the clamping leg (43).

19. Terminal according to any of the preceding claims, wherein the recess (45) has the following geometry: by means of the geometry, the torsion of the clamping leg (43) during actuation is reduced in comparison with an identically constructed connection terminal having a clamping spring without a recess.

20. Connection terminal according to any of the preceding claims, characterized in that a section of the housing (2) and/or a section of the busbar (3) and/or a section of the actuating element (5) protrudes into the recess (45) or can be moved into the recess.