Conductor connection terminal and actuating means for a conductor connection terminal

Abstract

A conductor connection terminal (1) with a spring-loaded clamp connection (3) is described, which has a clamping spring (4) and a busbar (5), wherein an electrical conductor (2) can be clamped to the busbar (5) by means of a clamping leg (7) of the clamping spring (4). The conductor connection terminal (1) has an actuating means with an actuating lever (9), which has an actuating section (13) engaging the clamping leg and can be pivoted between a release position, in which the electrical conductor (2) is freely movable between the clamping leg (7) and the busbar (5), and a clamping position in which the clamping leg (7) clamps the electrical conductor (2) to the busbar (5).The actuating lever (9) can be pivoted in its release position into an over-center position in which the actuating lever (9) automatically holds its release position, and that the actuating means has a return means (17) which is designed to pivot the actuating lever (9) from the over-center position into the clamping position by the action of force (F) on the return means (17) of an electrical conductor (2) inserted into the conductor connection terminal (1).

Description

The invention relates to a conductor connection terminal having a spring force clamping connection which has a clamping spring and a busbar, wherein an electrical conductor can be clamped to the busbar by means of a clamping limb of the clamping spring. The conductor connection terminal has an actuating means with an actuating lever which has an actuating portion which engages on the clamping limb and is pivotable between a release position in which the conductor is freely movable between the clamping limb and the busbar, and a clamping position in which the clamping limb clamps the conductor to the busbar.The invention further relates to an actuating means for a conductor connection terminal, which has a pivotable actuating lever which has an actuating portion and is configured to be pivotable on the conductor connection terminal between a release position, in which a conductor is freely movable between a clamping limb and a busbar of the conductor connection terminal, and a clamping position, in which the clamping limb clamps the conductor to the busbar.DE 1 213 024 A discloses a terminal for a screwless conductor connection of electrical conductors, having a lever which is rotatably mounted in a terminal housing and is pivotable for generating a contact pressure against a spring-loaded lever serving for the housing walls and being intended for inserting a conductor into a terminal opening into a position which does not prevent the insertion of the conductor. The lever is locked in its position not preventing the insertion of the conductor. This locking can be released by inserting the conductor, wherein the conductor is clamped by the lever only after releasing the locking.EP 3 005 483 B1 discloses an electrical connection system with a guide bushing for guiding an electrical conductor to be clamped to a spring blade which interacts with a connection in order to create an opening for the passage of the electrical conductor to the mouth of the guide bushing. There is a movable lever which cooperates with the spring leaf between two stable positions such that, in a first hold-open position (i.e. the release position), the spring leaf is tensioned by the lever in an equilibrium position in which the opening is maximum, and, in a second closing position (i.e. the clamping position), the spring leaf is released. Means are provided for releasing the lever through the electrical conductor, the actuation of the release means through the conductor causing the balance between the lever and the spring leaf to be disturbed in the first open position.The actuating lever is held in the release position by a latching mechanism and the resetting by the electrical conductor to be clamped takes place by releasing the latching mechanism.It is an object of the present invention to provide an improved conductor terminal and an actuator for a conductor terminal. This is intended to allow, in particular, a robust and compact actuation with a self-holding in the release position and, in addition, a reliable triggering of the resetting by the electrical conductor to be clamped.It is proposed that the actuating lever in its release position can be pivoted into an over-center position in which the actuating lever automatically holds its release position, and that the actuating means has a restoring means which is configured for pivoting the actuating lever from the over-center position into the clamping position by the action of a conductor introduced into the conductor connection terminal on the restoring means.In the over-center position, the actuating lever is pivoted against the spring force of the clamping leg. Starting from a predefined pivot angle, the actuating lever can be supported in a self-supporting manner on the insulating material housing and / or on the busbar. This can be done, for example, by utilizing the spring force in an over-center position of the lever and / or by means of an additional supporting structure on the lever. In the over-center position, the lever remains in its release position.The restoring means can have an engagement surface on which a conductor introduced into the conductor connection terminal impinges and in the process can introduce a force into the restoring means. The restoring means can itself perform a translatory movement or a pivoting movement when force is introduced or transmit the force to a further structure of the actuating means. It can release a blocking of a pre-stressed element.The restoring means can be, for example, an integral part of the actuating lever, such that the conductor acts directly on a structure of the actuating lever without a further force transmission element being interposed therebetween.Due to the special self-holding solution, in which no latching takes place, but rather the release or open position is realized with the over-center position, the resetting can take place without complicated mechanisms acting on latching points. This allows a robust construction. The restoring means can be embodied simply and can be realized spatially very close to the actuating lever.The restoring means can be configured to introduce a torque into the actuating lever for releasing the actuating lever from the over-center position.For this purpose, the restoring means can define a lever arm with respect to the pivot axis of the actuating lever. By the conductor striking the restoring means, a restoring force is exerted on the lever arm, which generates a torque and thereby pivots the actuating lever at least so far from the over-center position that the spring force of the clamping leg acts on the actuating means and displaces the actuating lever into the clamping position.Due to the lever arm, in the event of an introduced torque, a smaller introduction of force into the restoring means is sufficient for restoring the actuating lever. In contrast, translatory displacements can require far more force.The restoring means can be designed in the form of a web.A web shape can be achieved, for example, by a beam-like or pin-like structure which has a greater length than the diameter of the structure. The web-shaped structure can be, for example, cylindrical or cuboidal. Other cross-sections, for example elliptical or polygonal cross-sections, are also possible. The web-shaped structure forms an engagement surface for the conductor on a surface facing an inserted conductor.With a web-shaped structure, a simple, material-saving, reliable embodiment of the restoring means can be achieved, which can be easily integrated into compact actuating means.The operation portion of the operation lever may be disposed on a side wall of the operation lever. A particularly compact and stable design can thus be realized.The actuating portion can be located in particular on an inner side of the side wall which faces an inserted conductor. It is advantageous if an actuating section is arranged on each of two mutually opposite side walls. These actuating portions can be located on the mutually facing inner sides of the two opposite side walls of the actuating lever.The actuating portion can be situated in the plane of the side wall or protrude therefrom, for example.The operating portion may have a cam shape, for example. This allows the clamping spring to be actuated by an eccentric movement. The actuating portion may have a support structure for the over-center position of the actuating lever.The restoring means can be arranged between two mutually opposite side walls of the actuating lever.This achieves a particularly compact solution in which unused installation space that is already available is used for the restoring means and no additional installation space is required. The restoring means can be accommodated in the space between the side walls of the actuating lever. When it connects opposite side walls, the actuating means may additionally be stabilized by the restoring means.The side walls can, for example, run parallel to one another. They can be connected to one another by the connecting section adjoining the side walls and running perpendicular to them. It is advantageous if the side walls taper and terminate in a grip edge. This grip edge can also be present on the end face of a grip plate connecting the side walls to one another. The two mutually opposite side walls can be pivotable jointly about a common pivot axis when the actuating lever is pivoted.The restoring means can be arranged between two side walls in such a way that sections of the restoring means project from at least one side wall. The restoring means can be connected to a side wall by one end each. For this purpose, the restoring means can be connected to the actuating lever as a separate part, for example after the actuating lever has been produced, subsequently or integrally with the production of the actuating lever.The restoring means can connect the side walls. A particularly stable embodiment of the actuating lever can thus be realized by utilizing the available free space for resetting.The main extension of the restoring means can run, for example, perpendicular to the side walls.The reset means can be displaced with a pivoting of the actuating lever from the clamping position into the release position from a non-release position spaced apart from a conductor insertion region of the conductor connection terminal into a release position into the conductor insertion region.This ensures reliable triggering only when the electrical conductor is inserted. The restoring means is pivoted away from the clamping region when the electrical conductor is inserted and therefore no longer interferes with the conductor in the clamping state in which the electrical conductor is clamped between the clamping leg and the busbar.The restoring means is only in a movement path of an inserted conductor when the actuating lever is in the release position, preferably in the over-center position. The restoring means can be arranged on the actuating means in such a way that it can be pivoted about its pivot axis at the same time as the actuating lever. In the release position, the electrical conductor can strike the restoring means and cause the actuating lever to pivot, but cannot in other positions. With a pivoting of the actuating lever from the release position into the clamping position, the restoring means can be displaced from the release position into the non-release position.The operating lever can be pivotable about a pivot axis which runs through the operating section.An actuating lever pivotable in this way enables a very compact design. In combination with a supporting structure on the actuating section, holding of the actuating lever in the over-center position can be achieved.The actuating section can have, for example, an actuating edge facing the clamping limb, which rotates together during pivoting about a pivot axis intersecting the actuating section and can displace the clamping limb, for example by means of an eccentric shape of the actuating section.The actuating means may have a bearing structure with which it is mounted in the conductor connection terminal. The mounting of the actuating means in the interior of the conductor connection terminal enables a simple and robust mounting. The bearing structure can be, for example, an outer contour on the actuating means, which rolls directly in a bearing of the insulating material housing and / or the busbar.The bearing structure can be a pivot bearing. This allows easy mounting to be achieved, which leads to easier actuation and resetting of the actuating lever by applying force to the resetting means with the inserted electrical conductor.The bearing structure can be realized, for example, with a pin on the actuating means or insulating material housing, which pin is rotatable in a corresponding bore on the counterpart. The pivot axis, which is rigid in this case, then runs through the pivot bearing. However, a floating pivot bearing is also conceivable, in which the axis of rotation or the corresponding instantaneous pole migrates during pivoting.The actuating lever can be pivotable about a pivot axis which is spaced apart from a force application surface of the restoring means. By such a configuration of a lever arm, the force required for the resetting is reduced.The force application surface may be the surface of the restoring means which faces an inserted conductor. The pivot axis should preferably extend at a distance such that it does not intersect the force application surface or extends in the plane thereof.The actuating lever can have a grip edge at which a manual lever force can be introduced into the actuating lever in order to pivot the actuating lever between the clamping position and the release position. This allows simple and intuitive operation.The actuating lever can be pivoted manually from the clamping position into the release position in order to release the clamping point. The resetting can take place automatically by the resetting means. However, manual resetting by manual engagement with the grip edge is also conceivable, which is advantageous, for example, in the case of very flexible conductor ends. The grip edge can run e.g. perpendicular to the side walls and connect them. The actuating lever can thus be configured even more stably. The grip edge can be spaced from the pivot axis in order to utilize the lever arm to reduce the force required for the return.The restoring means can be spaced apart from the grip edge. Thus, two different lever arms can be used with respect to the pivot axis, namely on the one hand the lever arm via the grip edge and on the other hand the lever arm via the restoring means.The grip edge does not form the restoring means. Rather, both functional elements are each spaced apart from the pivot axis. The grip edge and the restoring means can lie, for example, in a plane which is spanned perpendicular to the planes of the side walls. The restoring means can be closer to the pivot axis than to the grip edge or vice versa.The actuating lever can have a tool holder. With an additional tool, the lever arm is extended so that the force required for actuation can be reduced. The tool holder can be formed on the lever additionally or instead of a grip edge. Thus, the tool holder can be provided instead of a grip edge in order to realize an even more compact design of the conductor connection terminal. This is advantageous in particular in the case of restricted space conditions. A tool holder is particularly useful for automatic resetting.The tool holder can be, for example, a slot, a cross slot, a torx or another recess with a contour matching a tool. The tool can be, for example, a screwdriver.The restoring means can be pivotably mounted on the conductor connection terminal. This mounting enables a better use of lever arms. A resetting can thus already take place with a small introduction of force.The restoring means itself can have its own pivot axis which runs, for example, through a pivot bearing with which the restoring means is mounted in the insulating material housing. The restoring means can form, for example, a rocker arm, one end of which can be actuated by the electrical conductor to be clamped, so that the restoring means is pivoted. The other lever end of the rocker lever can be connected to the actuating lever, which is displaced from the over-center position in the direction of the clamping position when the restoring means is pivoted.The reset means may comprise a securing means. This makes it possible to avoid an undesired triggering, for example due to vibration. Such a securing means requires a minimum force for releasing the restoring means.The securing means can be, for example, a spring element which is connected to the restoring means and, for example, is suspended in the insulating material housing. The minimum force is thereby impressed by the characteristic of the spring element.The restoring means may have an adjusting means. This allows a demand-dependent, individual configuration of the reset.Such an adjustable triggering force can be realized, for example, by a spring element.The object is furthermore achieved by an actuating means for a conductor connection terminal, which has a pivotable actuating lever which has an actuating section and is configured to be pivotable on the conductor connection terminal between a release position, in which a conductor is freely movable between a clamping limb and a busbar of the conductor connection terminal, and a clamping position, in which the clamping limb clamps the conductor to the busbar. It is proposed that the actuating lever is configured to be pivotable in its release position on the conductor connection terminal into an over-center position in which the actuating lever automatically holds its release position, and that the actuating means has a restoring means which is configured to pivot the actuating lever from the over-center position into the clamping position by the action of force of a conductor introduced into the conductor connection terminal on the restoring means.Such an actuating means can have, for example, a supporting structure which enables holding in the over-center position or self-holding by utilizing the spring force in the over-center position of the lever.The invention is described in more detail below with reference to the attached drawings with exemplary embodiments. They show FIG. 1 is a side sectional view of a first embodiment of a conductor connection terminal with the operating lever opened and the restoring means on the operating lever in the release position; FIG. 2 is a perspective view of the operating lever of the conductor connection terminal from FIG. 1 ; FIG. 3 is a side sectional view of a second embodiment of a conductor connection terminal with the operating lever opened and the restoring means on the operating lever in the release position; FIG. 4 shows a perspective view of the actuating lever of the conductor connection terminal from FIG. 3 with a pin-shaped bearing structure on the actuating lever; FIG. 5 is a side sectional view of a third embodiment of a conductor connection terminal with an open actuating lever and a rocker lever as a restoring means for the actuating lever; FIG. 6 shows an enlarged detail view of the detail D from FIG. 5.FIG. 1 shows a side sectional view of a first embodiment of a conductor connection terminal 1 for clamping an electrical conductor 2 to a spring force clamping connection 3, which has a clamping spring 4 and a busbar 5. The clamping spring 4 has a contact leg 6 mounted on the busbar 5, a clamping leg 7 with a clamping edge for clamping the electrical conductor 2 between the clamping leg 7 and a clamping point on the busbar 5, and a spring bend 8 connecting the clamping leg 7 to the contact leg 6.For opening the clamping spring 4 by moving the clamping leg 7 toward the contact leg 6 against the spring force of the clamping spring 4, an actuating lever 9 is pivotally installed in an insulating material housing 10.The actuating lever 9 has a side wall 11 which extends into the interior of the insulating material housing 10 and is mounted pivotably in the insulating material housing 10 by means of a bearing structure 12. The bearing structure 12 can be designed for floating bearing on the spring force clamping connection 3 and / or the insulating material housing 10. However, a pivot bearing about a fixed axis of rotation, as shown, with an at least partially circular pivot pin which is formed by an actuating section 13, i.e. a driver contour, for moving the clamping limb 7 to the contact limb 6 when the actuating lever 9 is pivoted from the horizontal closed position into the vertical open position, is also conceivable.In the open position shown, the actuating lever 9 is in an over-center position, in which the actuating lever 9 automatically holds its release position. For this purpose, the clamping spring 4 exerts a spring force on the actuating lever 9, which acts against the pivoting movement leading into the closed position.In the open position, the stripped end of the electrical conductor 2 can be guided in the conductor connection region between the busbar 5 and the contact limb 6 past the clamping point into a conductor collection pocket 14 of the insulating material housing 10. In the exemplary embodiment shown, the busbar 5 is angled transversely with respect to the conductor insertion direction L and has a conductor plug-through opening 15 which is bounded at its upper free end by a transverse web 16 which serves as a support for the contact limb 6.The actuating lever 9 has a restoring means 17 which, in the exemplary embodiment shown, is designed as a web extending from the side wall 11. When the operating lever 9 is open, as shown, the restoring means 17 on the operating lever 9 is in the release position. For this purpose, the restoring means 17 is positioned in the conductor insertion region. In the release position, the restoring means 17 is preferably located between the end section of the conductor collecting pocket 14, i.e. the base region, and the conductor plug-through opening 15 in the busbar 5 or the upstream conductor insertion opening 18 in the insulating material housing 10.When the electrical conductor 2 is inserted in the conductor insertion direction L, the stripped end is guided through the conductor insertion opening 18 and the conductor insertion opening 15 and strikes the web-shaped restoring means 17 which is located in the conductor insertion region toward the conductor collection pocket 14. The electrical conductor 2 thus exerts a restoring force F on the restoring means 17, with which restoring force a return of the actuating lever 9 from the over-center position into the closed position can be achieved if said restoring force exceeds the holding force of the clamping spring 4 on the actuating lever 9 for holding in the over-center position. The restoring means 17 is arranged offset with respect to the pivot axis of the actuating lever 9, so that when the restoring force F acts on the restoring means, a torque M is exerted on the actuating lever 9, which torque pivots the actuating lever 9 at least so far from the over-center position that the spring force of the clamping limb 7 acts on the actuating portion 13 (entrainment contour) of the actuating lever 9 in the direction of the restoring torque M. As soon as the reversal point leading during pivoting into the over-center position is reached during the pivoting back of the actuating lever 9, no further influence of force on the restoring means 16 is required any longer. Then, the operating lever 9 is automatically pivoted back into the closed position by the force of the clamping spring 4.Thus, only a relatively low restoring force of the electrical conductor 2 on the restoring means 16 is required, which restoring force is required to overcome the holding force acting on the actuating lever 9 in the over-center position.To open the spring force clamping connection, the actuating lever 9 can be gripped at a gripping edge 19 which is present on the side wall 11 and / or on a gripping plate 20 projecting from the side wall 11. The grip edge 19 can be arranged at the free end of the actuating lever 9. The free end protrudes from the insulating material housing 10 and, unlike the end section rotatably mounted in the insulating material housing 10, is freely movable.The sectional illustration shows the upwardly folded actuating lever 9 for the spring force clamping connection 3 shown in section and a closed actuating lever lying behind it, the grip edge 19 of which projects from the insulating material housing 10 on the insertion side of the conductor insertion opening 18 for the insertion of an electrical conductor 2. This can be done by a beveled contour of the insulating housing 10, as shown, or by a sufficient length of the actuating lever 9 so that it protrudes forward from the contour of the insulating housing 10.FIG. 2 shows a perspective view of the actuating lever 9 from FIG. 1, it can be seen that the actuating lever 9 has two mutually opposite side walls 11 which are arranged at a distance from one another and are connected to one another at the upper side by the grip plate 20. This grip plate 20 is located at the front free end region. At the free end of the actuating lever 9 there is arranged the grip edge 19 which forms the front end of the grip plate 20 in the transition between the side walls 11.On the opposite side, the side walls 11 are connected to one another approximately at the level of the grip plate 20 by the web-shaped restoring means 17. The web-shaped restoring means 17 extends transversely from the inner surface of one side wall 11 to the inner surface of the opposite side wall 11.FIG. 3 shows a second embodiment of a conductor connection terminal 1, in which a pin-shaped bearing structure 12 is provided. A pivot pin protrudes from the side wall 11 and dips into a bearing opening of the insulating material housing 10 in order to form a pivot bearing of the bearing structure 12. In the exemplary embodiment shown, a pivot pin projects from each of the two mutually opposite side walls 11.However, an inverse bearing structure 12 with a bearing opening in the side wall 11 or the two mutually opposite side walls 11 into which a pivot pin formed on the insulating material housing 10 projects in each case is also conceivable.The bearing structure 12 is positioned with respect to the force application surface 13 of the actuating lever 9 such that, in the illustrated upwardly folded open position of the actuating lever 9, a torque or a holding force is exerted on the actuating lever 9 by the clamping limb 7, said torque or holding force holding the actuating lever 9 in the open top dead center position.In addition, a further outer bearing structure 12 acan be present on the side walls 11 which is concentric with the pivot pin 12 and rolls on a curved bearing surface 22 of the insulating material housing.FIG. 4 shows a perspective view of the actuating lever 9 of the conductor connection terminal 1 from FIG. 3, which shows the bearing structure 12 formed with a pivot pin projecting from the inner side of the side wall 11, said bearing structure being located at a distance from the web-shaped restoring means 17, which is formed as in the embodiment according to FIG. 2 and cannot be seen in the illustration.The side walls 11 also have on their inner side, with respect to the pivot axis S B of the actuating lever 9, eccentric actuating contours which form force application surfaces 13 for the clamping limb 7. When the actuating lever 9 is pivoted into the open position, the force application surfaces 13 come into contact with the clamping limb 7 in order to displace the latter in the direction of the contact limb 6 counter to the spring force of the clamping spring 4 and thus to open the spring force clamping connection 3.On the underside of the actuating contour, a curved outer bearing structure 12 acan be provided, which cooperates concentrically to the pivot axis S B of the actuating lever 9 with a correspondingly curved bearing surface 22 of the insulating material housing 10.It can also be seen that the grip edge 19 is arranged at a distance from the pivot axis S B of the actuating lever 9 in order to form a lever arm. By applying force to the grip edge 19, the actuating lever 9 can be pivoted about the pivot axis S B into the open position.FIG. 5 shows a third embodiment of the conductor connection terminal 1, which has a construction of the insulating material housing 10 and actuating lever 9 comparable to the embodiment in FIG. 3. Therefore, reference can be made substantially to the preceding description.The actuating lever 9 has a latching contour 23 on its grip plate 20, which latching contour engages under the insulating material housing 10 in the illustrated open position of the actuating lever 9. This forms a stop or a latch which holds the actuating lever 9 in the open position. In this embodiment, the over-center position can be realized exclusively by this latching means. It is also conceivable, however, that the position of the pivot axis S B and the force application surface 13 of the clamping leg 7 on the actuating lever 9 are additionally selected such that the spring force of the clamping spring 4 holds the actuating lever 9 in the open position.In this embodiment, the restoring means 17 is designed as a restoring lever mounted pivotably in the insulating material housing 10 about a pivot bearing 24. It is a separate element from the insulating housing 10 and the actuating lever 9. In all embodiments, the actuating lever 9 and the restoring means 17 formed integrally therewith or separate together form an actuating means for the spring force clamping connection 3.The restoring means 17 has a force application surface 21 arranged in the conductor collection pocket 14, which merges after a curvature into a pivot bearing 24 (pivot axis), which is adjoined by a release section 25. A restoring force F exerted by the inserted electrical conductor 2 on the force application surface 21 leads to a pivoting of the restoring lever (restoring means 17), which corresponds to the pivoting direction of the actuating lever 9 from the open position into the closed position. In this case, the release section 25 acts on the latching contour 23 in order to guide it out of the latching stop with the insulating material housing 10. For this purpose, the latching contour 23 can be formed, for example, as an elastic plastic section in the manner of a film hinge on the plastic material of the actuating lever 9.In the closed actuating lever of the multipolar conductor connection terminal 1 located behind the opened actuating lever 9, it can be seen that the latching contour 23 protrudes from the plane of the grip plate 20.FIG. 6 shows an enlarged detail D from FIG. 5, wherein the reset lever (reset means 17), which is pivotably mounted about the pivot bearing 24, can be better seen. The free end of the release section 25 remote from the pivot bearing 24 is arranged next to the latching tab, which forms a latching contour 23 of the actuating lever 9 and engages under a cover wall 26 of the insulating material housing 10. It is clear that the insulating material housing 10 thereby forms a stop for the latching contour 23, which prevents the actuating lever 9 from pivoting back out of the open position shown in the direction of the torque M.If the reset lever (reset means 17) is now pivoted towards the latching contour 23 by the electrical conductor 2 exerting a reset force F on the opposite force application surface 21, the latching is canceled and the actuating lever 9 can pivot from the open position shown into the closed position. This is supported by the force of the clamping leg 7 acting on the actuating lever 9. The reset lever 17 guides the actuating lever 9 out of the over-center position by cancelling the latching and, if appropriate, by an additional force impulse.It can also be seen that the busbar 5 in this exemplary embodiment is angled transversely with respect to the conductor insertion direction L and has a conductor plug-through opening 15 which is bounded at its upper free end by a transverse web 16. This cross-piece 16 serves as a support for the contact leg 6, which is hooked into the conductor plug-through opening 15 and engages around the cross-piece 16.The embodiment of the conductor connection terminal 1 with latching means and reset lever shown in FIGS. 5 and 6 can also be combined with an operating lever 9 of a different design, for example with the operating lever 9 from FIG. 2 or with another operating lever 9 mounted in a floating manner.List of reference characters1 Conductor connection terminal 2 Electrical conductor 3 Spring force clamping connection 4 Clamping spring 5 Busbar 6 Contact limb 7 Clamping limb 8 Spring bend 9 Actuating lever 10 Insulating material housing 11 Side wall 12 Bearing structure 12 a Structure 13 Actuating section 14 Conductor collection pocket 15 Conductor plug-through opening 16 Transverse web 17 Restoring means 18 Conductor plug-in opening 19 Gripping edge 20 Gripping plate 21 Force application surface 22 Bearing surface 23 Latching contour 24 Pivot bearing 25 Release section 26 Covering wall S B Pivot axis of the actuating leverReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 1 213 024 A

[0003] EP 3 005 483 B1

[0004]

Claims

Conductor connection terminal (1) with a spring force clamping connection (3) which has a clamping spring (4) and a busbar (5), wherein an electrical conductor (2) can be clamped to the busbar (5) by means of a clamping limb (7) of the clamping spring (4), wherein the conductor connection terminal (1) has an actuating means with an actuating lever (9) which has an actuating portion (13) which engages on the clamping limb and can be pivoted between a release position, in which the electrical conductor (2) is freely movable between the clamping limb (7) and the busbar (5), and a clamping position, in which the clamping limb (7) clamps the electrical conductor (2) to the busbar (5), characterized in that the actuating lever (9) can be pivoted into an over-center position in its release position, in which the actuating lever (9) automatically holds its release position, and in that the actuating means has a restoring means (17) which is configured to pivot the actuating lever (9) from the over-center position into the clamping position by the action of force (F) of an electrical conductor (2) introduced into the conductor connection terminal (1) on the restoring means (17).Conductor connection terminal (1) according to Claim 1, characterized in that the restoring means (17) is configured to introduce a torque (M) into the actuating lever (9) for releasing the actuating lever (9) from the over-center position.Conductor connection terminal (1) according to claim 1 or 2, characterised in that the restoring means (9) is designed in the form of a web.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating section (13) of the actuating lever (9) is arranged on a side wall (11) of the actuating lever (9).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the restoring means (17) is arranged between two mutually opposite side walls (11) of the actuating lever (9).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the restoring means (17) can be displaced, with pivoting of the actuating lever (9) from the clamping position into the release position, from a non-release position, which is spaced apart from a conductor insertion region of the conductor connection terminal (1), into a release position in the conductor insertion region.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating lever (9) can be pivoted about a pivot axis (S B) which runs through the actuating section (13).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating lever (9) has a bearing structure (12), with which the actuating lever (9) is mounted in the conductor connection terminal (1).Conductor connection terminal (1) according to Claim 8, characterized in that the bearing structure (12) is a rotary bearing.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating lever (9) can be pivoted about a pivot axis (S B) which is spaced apart from a force application surface (21) of the restoring means (17).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating lever (9) has a grip edge (19), at which a manual lever force can be introduced into the actuating lever (9) in order to pivot the actuating lever (9) between the clamping position and the release position.Conductor connection terminal (1) according to claim 11, characterised in that the restoring means (17) is spaced apart from the grip edge (19).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the actuating lever (9) has a tool holder.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the restoring means (17) is mounted pivotably on the conductor connection terminal (1).Conductor connection terminal (1) according to one of the preceding claims, characterized in that the restoring means (17) has a securing means.Conductor connection terminal (1) according to one of the preceding claims, characterized in that the restoring means (17) has an adjusting means.Actuating means for a conductor connection terminal (1) having a pivotable actuating lever (9) which has an actuating portion (13) and is configured to be pivotable on the conductor connection terminal (1) between a release position in which an electrical conductor (2) is freely movable between a clamping limb (7) and a busbar (5) of the conductor connection terminal (1) and a clamping position in which the clamping limb (7) clamps the electrical conductor (2) to the busbar (5), characterized in that the actuating lever (9) is configured to be pivotable in its release position on the conductor connection terminal (1) into an over-center position in which the actuating lever (9) automatically holds its release position, and in that the actuating means has a restoring means (17), which is configured for pivoting the actuating lever (9) from the over-center position into the clamping position by the action of force (F) of an electrical conductor (2) inserted into the conductor connection terminal (1) on the restoring means (17).Actuating means according to claim 17, characterised in that the actuating means is formed according to one or more features of claims 1 to 16.

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