Spring-cage terminal and conductor connection terminal

Abstract

Spring-loaded terminal connection (2) with a busbar section (3), a pivotably mounted actuating element (17), and a leg spring (4) which has a contact leg (5) mounted on the busbar section (3), a clamping leg (6), and a spring arch (7) connecting the contact leg (5) to the clamping leg (6), characterized in that a tension element (21) extends from the actuating element (17) past the contact leg (5) and clamping leg (6), the tension element (21) extending from a first end section to a second end section, the tension element (21) being pivotally connected to the actuating element (17) at the first end section, and having a bearing pin (23) at the second end section, which bears against the clamping leg (6) on the side of the clamping leg (6) facing away from the contact leg (5).

Description

The invention relates to a spring force clamping connection having a busbar piece, a pivotably mounted actuating element and a leg spring which has a contact leg mounted on the busbar piece, a clamping leg and a spring bend connecting the contact leg to the clamping leg.The invention further relates to a conductor connection terminal having an insulating material housing and such a spring force terminal connection in the insulating material housing.Spring force clamping connections serve for clamping an electrical conductor to a clamping point which is formed between the clamping limb of a clamping spring and a busbar.DE 20 2017 107 202 U1 discloses a connecting device for connecting a conductor end, which connecting device has a housing and a busbar section, a clamping spring arrangement and a rotary lever arrangement in the housing. The clamping spring arrangement is rotatable with the aid of the rotary lever arrangement from an open position into a contact position in which the conductor end is contacted. The rotary lever arrangement and the clamping spring arrangement have the same direction of rotation during the rotation from the open position into the contact position.DE 10 2014 114 026 A1 discloses a conductor connection terminal with an insulating material housing and a contact insert arranged in the insulating material housing. The contact insert has a contact piece and a clamping spring, wherein the contact piece with the clamping spring forms at least one conductor clamping point for an electrical conductor which is contacted by means of the conductor connection terminal by the electrical conductor of the conductor clamping point being acted upon by a spring force of the clamping spring. An actuating element for actuating the clamping spring is pivotably floatingly mounted in the insulating material housing and is supported on the contact piece at least in the open position. The conductor connection terminal has first latching means, by means of which the actuating element is latched in the open position. The first latching means comprise a first lever latching means which is part of the actuating element and a first contact piece latching means which is part of the contact piece, which interact with one another for latching the actuating element in the open position. The first contact piece detent means is formed by the front edge or a rounded front edge at the front end of an upper section of the contact piece facing the actuating element.Proceeding from this, it is an object of the present invention to provide an improved spring force clamping connection and a conductor connection terminal having such a spring force clamping connection.The object is achieved with the spring force terminal having the features of claim 1 and with the conductor terminal having the features of claim 16. Advantageous embodiments are described in the dependent claims.It is proposed that a tension element extends from the actuating element past the contact leg and clamping leg, wherein the tension element extends from a first end section to a second end section and the tension element is connected at the first end section to the actuating element in a rotationally articulated manner and has at the second end section a bearing pin which abuts on the clamping leg on the side of the clamping leg facing away from the contact leg. The contact leg and the clamping leg of the clamping spring are thus arranged between the first end section and the second end section.By guiding the tension element past the contact leg and clamping leg, which is also to be understood as a passage through an opening in the contact leg and clamping leg, the clamping leg is gripped from below by the bearing pin at the second end section and a tilt-proof guidance of the clamping leg or mounting of the contact leg is achieved. The clamping leg can be pulled with the tension element through the bearing pin at the second end section toward the actuating element with a force acting from the first end section on the side facing away from the clamping leg.The tension element, which can be designed as a flat component, can span a plane that is transverse to the plane of the contact limb and transverse to the plane of the clamping limb. Transverse stability is thus achieved and the tensile force can be transmitted in such a way that the tensile element is flexurally rigid and the clamping limb does not tilt.The bearing pin can be passed transversely through the plane of the tension element. The tension element is thus mounted in such a way that the forces in the flexurally rigid plane of the tension element are dissipated to the bearing pin and transverse forces on the tension element which could lead to bending of the tension element are substantially avoided. Only a single bore in the tension element is required for mounting the respective bearing pin.The bearing pin can be cylindrical. The bearing pin can thus roll on the clamping limb and, if appropriate, be mounted in a bearing depression of the clamping limb formed by a bend or curvature.The busbar piece can be configured in the form of a cage with a clamping section, a bearing section spaced apart from the clamping section and a side wall connecting the clamping section to the bearing section, wherein the intermediate space accommodates the bearing limb and the clamping limb and the actuating element is pivotably mounted on or on the bearing section on the surface thereof facing away from the clamping section. This provides a stable busbar piece which provides an intermediate space for guiding the electrical conductor to the clamping point formed in the intermediate space, for providing a conductor collecting pocket through the intermediate space and for laterally guiding the clamping limb or mounting the bearing limb.The actuating element can be supported in a floating or sliding manner.The clamping leg and the contact leg can have a slot. The tension element can be passed through the slots. These slots allow symmetrical application of force to the clamping leg and a tilt-resistant guidance of the tension element, on which no appreciable bending forces can act. Bending forces at an angle to the plane of the tension element are absorbed by the aligned slots in the clamping leg and contact leg.The tension element can be guided laterally past the clamping spring, wherein the tension element extends past side edge edges of the contact leg and of the clamping leg. This achieves lateral guidance of the contact leg and clamping leg by the tension element.The tension element can have two pull tabs spaced apart from one another, which are each guided laterally past the clamping spring on mutually opposite sides, wherein the pull tabs extend past the side edge edges of the contact limb and of the clamping limb. This achieves a double-sided guiding of the clamping leg or double-sided mounting of the contact leg.The pull tabs may be pivotally connected to the actuation member at the first end portion. The pull tabs are thus movably mounted on the actuating element in order to convert the pivoting or rotational movement of the actuating element or the movement of the bearing along a part-circular path substantially into a linear movement of the pull tabs. A pivoting movement can be superimposed on the linear movement of the pull lugs. The bearing pin can connect the two pull lugs to one another at their second end section. The bearing pin thus stabilizes the pull tabs in order to form a frame, in addition to its function as a driver element for the clamping spring, in order to convert the tensile stress acting in the pull tabs into a local compressive force and to pull the clamping spring toward the contact leg and actuating element.The pull tabs can be formed integrally with a transverse web connecting the pull tabs. The transverse web creates a stable tension element, the tension straps of which adjoin the side edges of the contact and clamping leg on both sides and guide or support these laterally.The pull lugs can be formed as two separate parts which are connected to one another by the pivotable connection to the actuating element at the first end region and the connection by the bearing journal at the second end region.A bearing pin can be provided for the swivel joint connection of the bearing element to the actuating element, wherein the bearing pin is accommodated and / or guided in bearing openings of the tension element and of the actuating element.A conductor terminal has an insulating housing and a spring force terminal described above in the insulating housing. The insulating material housing may have a conductor insertion channel which is designed for guiding an inserted electrical conductor to a clamping point formed between a clamping edge of the clamping leg and the busbar piece. The insulating material housing can have an actuating opening for receiving the actuating element.This embodiment of a conductor connection terminal can also be designed as a multipolar conductor connection terminal with a plurality of spring force clamping connections. In this case, the plurality of spring force clamping connections can each have separate busbar pieces. However, it is also conceivable for at least two spring force clamping connections to have a common busbar piece and thus to be electrically conductively connected to one another via the busbar piece.Two or more spring force clamping connections can also have a common actuating element, so that with a pivoting movement of the actuating element two or more clamping legs can be displaced by at least one tension element coupled to the actuating element.The actuating element can be mounted in the insulating material housing and connected to the tension element in such a way that it assumes a stable end position in each case in the open state of the leg spring and in the closed state of the leg spring. In particular in the open state, an over-center position can thus be present, in which the clamping spring exerts a force on the actuating element via the tension element, said force acting in the pivot direction directed for the further opening of the clamping spring.In the context of this application, the words "a / an", unless expressly defined otherwise, are not to be understood as a numerical word, but rather as an indeterminate article having the word sense of "at least one / one".The invention allows various embodiments and is described in more detail below by way of example with reference to an exemplary embodiment. The following are shown: FIG. 1 shows a perspective view of a conductor connection terminal with an unactuated spring force clamping connection in the clamping position; FIG. 2 shows a perspective view of the conductor connection terminal from FIG. 1 with the spring force terminal actuated in the open position; FIG. 3 is a perspective view of the unactuated spring force clamping connection in the clamping position from FIG. 1 ; FIG. 4 is a perspective view of the spring force clamping connection from FIG. 3 with a tension element without an actuating element, which is passed through slots in the clamping spring; FIG. 5 shows a perspective view of the busbar piece and the clamping spring of the spring force clamping connection from FIGS. 3 and 4 inserted therein; FIG. 6 shows a perspective side view of the busbar piece and the clamping spring of the spring force clamping connection from FIG. 5 inserted therein; FIG. 7 is a perspective view of the clamping spring of the spring force clamping connection with an additional inner clamping spring; FIG. 8 shows a perspective view of the actuating element of the spring force clamping connection with a tension element connected in a swivel-joint manner; FIG. 9 is a perspective side view of the tension element; FIG. 10 is a perspective side view of the actuating element; FIG. 11 is a perspective view of a reinforcing element for the actuating element; FIG. 12 shows a perspective view of a variant of the conductor connection terminal with an unactuated spring force clamping connection in the clamping position and with the tension element guided laterally past the clamping spring; FIG. 13 is a perspective view of the spring force terminal of the conductor terminal of FIG. 12 ; FIG. 14 is a perspective view of the tension element formed from two tension straps and transverse web; FIG. 15 shows a perspective view of a variant of the conductor connection terminal with an unactuated spring force clamping connection in the clamping position and with a tension element guided through slots in the actuating element and in the clamping spring; FIG. 16 shows a perspective view of the clamping spring of the spring force clamping connection from FIG. 15 with an additional outer clamping spring.FIG. 1 shows a perspective view of a conductor connection terminal 1 with an unactuated spring force clamping connection 2 in the clamping position.The spring force clamping connection 2 has a busbar piece 3 and a leg spring 4. The leg spring 4 has a contact leg 5 mounted on the busbar piece 3, a clamping leg 6 and a spring bend 7 which connects the contact leg 5 to the clamping leg 6.In the exemplary embodiment shown, an optional tension spring 8 is also present, which bears against the leg spring 4 in the inner periphery of the spring bend 7 and ensures a higher spring force. The tension spring 8 extends from the spring bend 7 at least partially along the contact limb 5 and the clamping limb 6 and is shaped in a manner corresponding to the limb spring 4.The busbar piece 3 has a clamping section 9 which, together with the free end of the clamping limb 6, forms a clamping point for clamping an electrical conductor. Spaced apart from the clamping section 9 is a bearing section 10 on which the contact limb 5 is mounted. For this purpose, a bearing tab 11 can be angled out of the plane of the bearing section 10 parallel to the clamping section 9 and project toward the spring curve of the leg spring 4 held on the busbar piece 3.The busbar piece 3 furthermore has a side wall 12 connecting the clamping section 9 to the bearing section 10. In addition, opposite the side wall 12 and at a distance therefrom, a side web 13 can be bent upwards from the clamping section 9 in the direction of the bearing section 10. The intermediate space formed by the clamping section 9, the bearing section 10, the side wall 12 and the optional side web 13 accommodates the clamping leg 6 and the contact leg 5, in that an end section of the contact leg 5 and clamping leg 6 each enter into the intermediate space. The leg spring 4 is thus supported on the busbar piece 3 in a stable and tilting-proof manner. The side wall 12, the clamping section 9 and the side web 13 opposite the side wall 12 furthermore form a trough-shaped receptacle, in which an electrical conductor can be guided on both sides.The conductor connection terminal 1 has an insulating material housing 14 with a conductor insertion channel 15 which leads to the clamping section 8 of the busbar piece 3 and the clamping leg 6. For this purpose, the conductor insertion channel 15 is bounded by inner walls which serve for guiding the inserted electrical conductor. Furthermore, the insulating material housing 2 has an actuating opening 16, into which an actuating element 17 is movably installed. The actuating element 17 is mounted on walls of the insulating housing 2 delimiting the actuating opening 16, in particular on at least one side wall 18 and optionally also on end walls. In the exemplary embodiment shown, the actuating element 17 is pivotably mounted in the manner of an actuating lever.The actuating element 17 can be mounted on the insulating material housing 14 on a guide pin 19 so as to be pivotable about a fixed axis of rotation. However, a floating mounting about a traveling axis of rotation or a mounting about a fixed virtual axis of rotation is also conceivable. The guide pin 19 can enter a track-shaped guide groove and be guided there in a track curve. In order to derive the actuating forces not only via the guide pin 19 to the insulating material housing 14, the actuating element 17 can also rest on or on the bearing section 10 and can thus be (also) mounted by the bearing section 10.As an alternative to the bearings described above about a fixed axis of rotation or a guide in a track-shaped guide groove, the bearing can also be limited to a purely floating bearing with a guide of the actuating element 17 on boundary walls of the actuating opening 16. In the exemplary embodiment shown, there is no fixed axis of rotation at any rate.The leg spring 4, like the tension spring 8, has a slot 20 through which a tension element 21 in the form of a pull tab extends. The tension element 21 stresses a plane which is transverse to the plane of the contact limb 5 and transverse to the plane of the clamping limb 6. The tension element 21 extends from the actuating element 17 past the contact limb 5 and the clamping limb 6 by extending through the slots 20 transversely through the limb spring 4. In this case, the tension element 21 is connected at a first end section to the actuating element 17 in a rotationally articulated manner with the aid of a bearing pin 22 and has, at its second end section, which is situated opposite the first end section, a further bearing pin 23 which bears against the clamping leg 6 on the side of the clamping leg 6 facing away from the bearing leg 5. The tension element 21 thus engages under the clamping leg 6 in order to exert an actuating force on the clamping leg 6 directed toward the contact leg 5 when the actuating element 17 is pivoted.It can be seen that the bearing pins 22, 23 are guided transversely through the plane of the tension element 21 through this tension element 21.The pivoting of the actuating element 17 can be effected with the aid of an actuating tool 24, which can be inserted into an engagement opening 25 of the actuating element 17 and serves as a pivot lever.Optionally, however, the actuating element 17 can also have an integrally formed pivot lever or be coupled to an actuating kinematics. Such an actuation kinematics can be used, for example. These may be designed to convert a linear sliding movement into a pivoting movement. However, the actuating element 17 could optionally not be pivoted, but rather be mounted displaceably in the insulating material housing 14 in the direction of extent of the tension element 21. In this case, an actuation kinematics for implementing, for example, a. A tilting or pivoting movement introduced by an actuating tool 24 can be present in the linear movement of the actuating element 17.It can be seen that in the closed position of the leg spring 4 shown, the actuating element is mounted in a stable manner in an end position in the actuating opening 16 and on the busbar piece 3. This is achieved substantially by the planar bearing of the actuating element 17 on the bearing portion 10 and by the contours preventing further clockwise rotation, in particular of the bearing plate 11 and the contour of the actuating element 17 which lies next to the bearing journal 22 and forms a stop.FIG. 2 shows a perspective view of the conductor connection terminal 1 from FIG. 1 with the spring force terminal 2 actuated in the open position.It can be seen in comparison with FIG. 1 that the actuating tool 24 is pivoted counterclockwise, so that the actuating element 17 floatingly mounted in the insulating material housing 14 pivots and displaces the bearing pin 23 coupled to the tension element 21 in the direction of the contact leg 5. Thus, the clamping leg 6 is displaced against the spring force of the leg spring 4 toward the contact leg 5 into the open position. The first end section of the tension element 21, which is connected to the actuating element 17 in a rotationally articulated manner via the bearing pin 22, migrates away from the bearing section 10 and the contact limb 5 during the pivoting movement in order to draw the clamping limb 6 towards the contact limb 5 by a tensile stress in the tension element 21.The pivoting movement can be supported by the guide pin 19 which dips into a guide groove, not visible, in the side wall 18 of the actuating opening 16 and is guided there. The guide groove can describe a trajectory around a fixed virtual axis of rotation or, in the case of a floating mounting, around a moving virtual axis of rotation.It can be seen that an electrical conductor 26 can be inserted through the conductor insertion channel 15 into the opened clamping point between the free end of the clamping leg 6 and the clamping section 9. By pivoting the actuating element 17 into the clamping position of FIG. 1, the clamping leg 6 can clamp the stripped end of the electrical conductor 26 to the busbar piece 3 with its clamping edge at the free end, in order to produce an electrically conductive connection and to hold the conductor 26 mechanically firmly.In the illustrated open position of the leg spring 4, the actuating element 17 is in a stable end position (over-center position), in which the force acting from the tension element 21 on the actuating element 17 pulls in a direction in which automatic pivoting back of the actuating element 17 (clockwise in FIG. 2 ) is prevented. This can be done by pulling the actuating element 17 into a locking position or by the bearing pin 22 being located in a position relative to the (current virtual) axis of rotation at which the actuating element 17 is pivoted further in the opening direction.FIG. 3 shows a perspective view of the unactuated spring force clamping connection in the clamping position from FIG. 1.It is clear that the tension spring 8 is inserted into the inner periphery 4 of the spring arch 7 in order to reinforce the leg spring 4. The leg spring 4 and the tension spring 8 are traversed by a slot 20 which can extend longitudinally from the spring bend 7 in the direction of the free end of the contact leg 5 or clamping leg 6, respectively. The slots 20 in the tension spring 8 can each extend as far as the free end of the tension spring 8. The tension element 21 is arranged in the slot 20.In the exemplary embodiment shown, the slot 20 does not extend as far as the free end of at least the clamping leg 6, but is designed as an opening. A continuous clamping edge for clamping an electrical conductor to the free end of the clamping leg 6 is thus provided. The slot 20 made in the contact limb 5, on the other hand, can extend as far as the free end of the contact limb 5. Optionally, however, this slot 20 can also be designed as an opening framed on all sides, which ends in front of the free end of the contact limb 5.FIG. 4 shows a perspective view of the spring force clamping connection 2 from FIG. 3 with a tension element 21 without an actuating element 17 which is passed through slots 20 in the clamping spring 4; the cage-shaped structure of the busbar element 3 becomes clear here. The bearing section 10 has an optional additional bearing plate 10 a,which is placed on the side of the bearing section 10 facing away from the clamping section 9 and on its angled bearing tab 11. The bearing plate 10 acan be formed from plastic material in order to ensure improved electrical insulation between the busbar piece 3 and the actuating element 17 or else in order to ensure reduced friction between the bearing portion 10 and the actuating element 17.It can be seen that the bearing plate 10 aand the bearing tab 11 also have a slot 20 through which the tension element 21 extends. The clamping leg 6 is angled or rounded in the region of the slot 20. The bearing pin 23 bearing against the side of the clamping leg 6 facing away from the contact leg 5 is mounted in the angled or rounded portion of the clamping leg 6.FIG. 5 shows a perspective view of the busbar piece 3 and the clamping spring 4 of the spring force clamping connection 2 from FIGS. 3 and 4 inserted therein.It is clear that the U-shaped bent tension spring 8 in the inner periphery of the spring arch 7 bears against the leg spring 4 and, like the clamping spring 4, has slots 20 which are aligned with one another. Slots 20 are also present in the bearing section 10 with its bearing tab 11 and the bearing plate 10 alocated thereon. In order to guide the tension element 21 from the bearing plate 10 athrough the bearing section 10, the contact limb 5, through the two slots 20 in the tension spring 8 and through the clamping limb 6. The slots 20 have a longitudinal extent in the direction of extension of the contact limb 5 or clamping limb 6, so that the tension element 21, as can be seen in FIG. 4, is perpendicular to the plane of the contact limb 5 or clamping limb 6. The plane spanned by the tension element 21 is transverse to the plane of the contact leg 5 or clamping leg 6.It can also be seen that the clamping leg 6 is angled or curved in the region of its slot 20 in order to support the bearing journal 23 there.FIG. 6 shows a perspective side view of the busbar piece 3 and the leg spring 4 of the spring force clamping connection 2 from FIG. 5 inserted therein.It is clear that the bearing tab 11 protrudes in a direction pointing away from the clamping section 9. The clamping leg 6 dips with its free end section into the intermediate space between the clamping section 9, the side wall 12 and the side web 13.FIG. 7 shows a perspective view of the leg spring 4 of the spring force clamping connection 2 with an additional inner clamping spring 8.The clamping leg 6 has a clamping edge 27 at its free end. In the end region of the slot 20, the clamping leg 6 can be somewhat tapered in order to have a width adapted to the intermediate space between the side wall 12 and the side web 13. This achieves a spring arc which is as wide as possible and is wider than the intermediate space and thus ensures a greater spring force.The contact limb 5 has a slot 20 and runs out with two retaining lugs 28 spaced apart from one another by the slot. These holding tabs 28 engage under the bearing portion 10 and the side wall 12 laterally adjoins one of the holding tabs 28 in order to achieve a lateral mounting of the leg spring 4.FIG. 8 shows a perspective view of the actuating element 17 of the spring force clamping connection 2 with the tension element 21 connected in a rotationally articulated manner. This provides a tilt-proof guide.The actuator 17 formed of plastic material can be stabilized with a reinforcing member 30. The actuating element 17 has a cover section 31 which protrudes beyond the reinforcing element 30. The reinforcing element 30 has two side wall sections 32 spaced apart from one another and oriented parallel to one another, which are connected to one another by a transverse wall section 33. The bearing pin 22 is passed through the reinforcing element 30 and through the actuating element 17. In addition, the guide pin 19 is passed through the reinforcing element 30 and through the actuating element 17 and can protrude laterally out of the plane of the reinforcing element 30.FIG. 9 shows a perspective side view of the tension element 21 in the form of a sheet-metal tension plate. The tension element has a bearing opening 34 at each of the opposite ends. The tension element 21 is plate-shaped with a significantly smaller thickness than width and length. The tension element 21 thus clamps a plane in the width and length directions.FIG. 10 shows a perspective side view of the actuating element 17.On the end side opposite the slot 29, a depression 35a (or depression) is made for receiving the transverse wall section 33 of the reinforcing element 30. The side walls underlying the cover portion 31 are recessed toward the cover portion 31 to form a recess 35b for receiving the side wall portions 32 of the reinforcing member 30.The actuating element 17 has a bearing opening 36a (or bore) passing transversely through the slot 29 and a further bearing opening 36b for receiving the guide pin 19 (not shown), which can also extend through the slot 29 or lie next to the slot base of the slot 29.FIG. 11 shows a perspective view of a reinforcing element 30 for the actuating element 17.It can be seen that the reinforcing element 30 is formed as a sheet metal part in a U-shaped manner from the two side wall sections 32 and the transverse wall section 33 connecting the side wall sections 32. The reinforcing element 30 has bearing openings 37 a, 37 b, which are arranged offset relative to one another adjacent to the upper edge and lower edge relative to the orientation of the transverse wall section 33 and are each introduced in alignment into the mutually opposite side wall sections 32.FIG. 12 shows a perspective view of a variant of the conductor connection terminal 1 with an unactuated spring force clamping connection 2 in the clamping position and with the tension element 21 guided laterally past the clamping spring 4.The construction of the busbar element 3 and the clamping spring 4 is comparable to the first exemplary embodiment, so that reference is made to the explanations given above.The tension element 21 is formed from two tension straps 21 a, 21 b, which are spaced apart from one another and are connected to one another by a transverse web 38. The transverse web 38 is positioned between the actuating element 17 and the contact limb 5 adjacent to the contact limb 5. The pull tabs 21 a, 21 bare each guided past a side edge of the contact limb 5 and clamping limb 6, with the result that the clamping spring 4 is surrounded on both sides by the pull element 21.The bearing pins 22, 23 are guided through the two pull lugs 21 a, 21 b. Thus, a stable frame is formed.FIG. 13 shows a perspective view of the spring force terminal 2 of the conductor terminal 1 from FIG. 12.It is clear that the bearing pin 23, which engages under the clamping limb 6, connects the two pull lugs 21 a, 21 b, which are spaced apart from one another and are aligned parallel to one another, to one another. The transverse web 38 is positioned at a distance from the bearing journal 23 in order to receive the contact limb 5 and clamping limb 6 of the clamping spring 4 and the inner clamping spring 8 adjacent to the spring bend 7 between the transverse web 38 and the bearing journal 23. The clamping spring 4 is surrounded laterally on both sides by the pull tabs 21 a, 21 b.FIG. 14 shows a perspective view of the tension element 21 formed from two tension straps 21 a, 21 band transverse web 38.It is clear that the transverse web 38 formed integrally with the pull tabs 21 a, 21 bfrom a metal sheet connects the pull tabs 21 a, 21 bto one another and aligns the pull tabs 21 a, 21 bparallel to one another with the same direction of extension.The pull tabs 21 a, 21 bare each penetrated at their mutually opposite free ends by a bearing opening 34. In each case, a pair of bearing openings 34 of the two pull lugs 21 a, 21 bare aligned with one another at one end in each case, such that a bearing journal 22, 23 can be inserted through.FIG. 15 shows a perspective view of a variant of the conductor connection terminal 1 with the spring force clamping connection 2 unactuated in the clamping position and with a tension element 21 guided through slots 20 in the actuating element 17 and in the leg spring 4.The structure of the busbar piece 3 is comparable to the first exemplary embodiment. The front end edge of the side wall 12 and of the side web 13 can be designed as a slope. This is also optionally conceivable in the case of the exemplary embodiments described above.The passage of the tension element 21 as a tension strap guided through a slot 20 is also comparable to the first exemplary embodiment.The tension spring 8, on the other hand, is arranged on the outer periphery of the leg spring 4 and engages around the spring bow 7. the spring bow 7 thus lies within the correspondingly bent tension spring 8. the bearing pin 23 lies against the tension spring 8, so that the tension spring 8 lies between the clamping spring 4 and the bearing pin 23. The tension element 21 or the bearing journal 23 and the clamping leg 6 thus act on one another via the interposed chip spring 8.The actuating element 14 is designed without a reinforcing element. It may be reinforced by ribs 40. The engagement hole 25 may be formed by a tube extending through the ribs 40.The actuating element 14 bears directly on the bearing section 10 of the busbar piece 3. An additional electrically insulating bearing plate is not required, since the actuating element 14 is designed as a one-piece electrically insulating plastic element.The actuating element 14 has a rounded outer contour with a curvature which adjoins a surface resting on the bearing section 10 in the unactuated clamping position. Thus, the actuating element 14 can roll with the curvature in a pivoting movement on the bearing section 10 upon the action of a lever force applied via the engagement opening 25.FIG. 16 shows a perspective view of the leg spring 4 of the spring force clamping connection 2 from FIG. 16 with an additional outer tension spring 8.It can be seen that the tension spring 8 rests on the outer circumference of the clamping spring on the latter and has a contour corresponding to the spring curve 7 and the contact limb 5 with its retaining tab 28. The tension spring 8 also has, adjacent to the spring bend 7, a contour adapted to the clamping limb 6, which contour extends over a partial length of the clamping limb 6 adjacent to the clamping limb. The clamping leg 6 projects with its end section having the clamping edge 27 beyond the length of the tension spring 8.It can be seen that a slot 20 is introduced centrally in the width direction into the tension spring 8 and the leg spring 4. The slot 20 extends from the retaining tab 28 via the contact limb 5, the spring bow 7 as far as into a partial region of the clamping limb 6. However, an embodiment is also conceivable in which no slot 20 is arranged in the spring arch 7.List of reference characters1 Conductor connection terminal 2 Spring force clamping connection 3 Busbar piece 4 Leg spring 5 Contact leg 6 Clamping leg 7 Spring bow 8 Tension spring 9 Clamping section 10 Bearing section 10 a Plate 11 Bearing tab 12 Side wall 13 Side web 14 Insulating material housing 15 Conductor introduction channel 16 Actuation opening 17 Actuation element 18 Side wall 19 Guide pin 20 Slot 21 Tension element 21 a / b Tension tab 22 Bearing pin 23 Bearing pin 24 Actuation tool 25 Engagement opening 26 Electrical conductor 27 Clamping edge 28 Retaining tab 29 Slot 30 Reinforcing element 31 Cover section 32 Side wall section 33 Transverse wall section 34 Bearing opening 35 a / b Depression 36 a / b Bearing opening 37 a / b Bearing opening 38 Transverse web 39 Retaining pin 40 RibsReferences 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 20 2017 107 202 U1

[0004] DE 10 2014 114 026 A1

[0005]

Claims

Spring force clamping connection (2) having a busbar piece (3), a pivotably mounted actuating element (17) and a leg spring (4) which has a bearing leg (5) mounted on the busbar piece (3), a clamping leg (6) and a spring bend (7) connecting the bearing leg (5) to the clamping leg (6), characterized in that a tension element (21) extends from the actuating element (17) past the bearing leg (5) and clamping leg (6), wherein the tension element (21) extends from a first end section to a second end section and the tension element (21) is connected at the first end section to the actuating element (17) in a rotationally articulated manner and has at the second end section a bearing journal (23) which bears against the clamping leg (6) on the side of the clamping leg (6) facing away from the bearing leg (5).Spring force clamping connection (2) according to Claim 1, characterized in that the tension element (21) spans a plane which is transverse to the plane of the contact limb (5) and transverse to the plane of the clamping limb (6).Spring force clamping connection (2) according to Claim 1 or 2, characterized in that a bearing pin (22) is provided for the pivotal connection of the tension element (21) to the actuating element (17), wherein the bearing pin (22) is guided in bearing openings (27) of the tension element (21) and of the actuating element (17).Spring force clamping connection (2) according to one of Claims 1 to 3, characterized in that the bearing pin (22, 23) is guided transversely through the plane of the tension element (21).Spring force clamping connection (2) according to one of Claims 1 to 4, characterized in that the bearing pin (22, 23) is cylindrical.Spring force clamping connection (2) according to one of the preceding claims, characterized in that the busbar piece (3) is formed in the shape of a cage with a clamping section (9), a bearing section (10) spaced apart from the clamping section (9) and at least one side wall (12) connecting the clamping section (9) to the bearing section (10), wherein the intermediate space accommodates the bearing limb (5) and the clamping limb (6) and the actuating element (17) is mounted pivotably on or on the bearing section (10).Spring force clamping connection (2) according to one of the preceding claims, characterized in that the actuating element (17) is mounted in a floating or sliding manner.Spring force clamping connection (2) according to one of the preceding claims, characterized in that the clamping limb (6) and the bearing limb (5) each have a slot (20), and the tension element (21) is passed through the slots (20).Spring force clamping connection (2) according to one of Claims 1 to 6, characterized in that the tension element (21) is guided laterally past the leg spring (4), wherein the tension element (21) extends past side edge edges of the contact leg (5) and of the clamping leg (6).Spring force clamping connection (2) according to Claim 8, characterized in that the tension element (21) has two pull tabs (21a, 21b) which are spaced apart from one another and are each guided laterally past the leg spring (4) on mutually opposite sides, the pull tabs (21) extending past the side edge edges of the bearing leg (5) and of the clamping leg (6).Spring force clamping connection (2) according to Claim 9, characterized in that the pull tabs (21) are connected at the first end section to the actuating element (17) in a rotationally articulated manner, and the bearing journal (23) connects the two pull tabs (21a, 21b) to one another at their second end section.Spring force clamping connection (2) according to Claim 9 or 10, characterized in that the pull tabs (21a, 21b) are formed integrally with a transverse web (38) connecting the pull tabs (21a, 21b).Spring force clamping connection (2) according to Claim 9 or 10, characterized in that the pull lugs (21a, 21b) are designed as two separate parts which are connected to one another by the pivotable connection to the actuating element (17) at the first end region and the connection by the bearing journal (23) at the second end region.Spring force clamping connection (2) according to one of the preceding claims, characterized in that a tension spring (8) is arranged in or on the spring bend (7).Spring force clamping connection (2) according to one of the preceding claims, characterized in that a reinforcing element (30) engages around the actuating element (17).Conductor connection terminal (1) with an insulating material housing (14) and with a spring force clamping terminal (2) in the insulating material housing (14), wherein the insulating material housing (14) has a conductor insertion channel (15) which is designed for guiding an inserted electrical conductor (26) to a clamping point formed between a clamping edge of the clamping limb (6) and the busbar piece (3), and wherein the insulating material housing (14) has an actuating opening (16) for receiving the actuating element (17).Conductor connection terminal (1) according to Claim 16, characterized in that the actuating element (17) is mounted in the insulating-material housing (2) and is connected to the tension element (21) in such a way that it assumes a stable end position in each case in the open state of the leg spring (4) and in the closed state of the leg spring (4).

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