Spring-cage terminal and conductor connection terminal

Abstract

The invention relates to a spring clamp connection with - a clamping spring having a clamping leg with a clamping edge at the free end of the clamping leg, a contact leg for supporting the clamping spring, and a spring arch connecting the contact leg to the clamping leg, and - a busbar having a contact area, wherein the clamping leg with its clamping edge and the contact area are designed for clamping an electrical conductor between the clamping edge and the contact area, and - a locking section which has a holding contour and is designed to lock the clamping edge of the clamping leg pivoted into an open position away from the contact area of ​​the busbar. The invention further relates to a conductor connection terminal with an insulating housing and with such a spring-loaded terminal connection in the insulating housing.

Description

[0001] The invention relates to a spring clamp connection with - a clamping spring having a clamping leg with a clamping edge at the free end of the clamping leg, a contact leg for supporting the clamping spring, and a spring arch connecting the contact leg to the clamping leg, and - a busbar having a contact area, wherein the clamping leg with its clamping edge and the contact area are designed for clamping an electrical conductor between the clamping edge and the contact area, and - a locking section which has a holding contour and is designed to lock the clamping leg pivoted into an open position away from the contact area of ​​the busbar.

[0002] The invention further relates to a conductor connection terminal with an insulating housing and with such a spring-loaded terminal connection in the insulating housing.

[0003] Spring-cage terminals are used to connect an electrical conductor to a terminal formed between the clamping leg of a spring clamp and a busbar. To connect the electrical conductor, the clamping spring can be pushed away from the busbar by the electrical conductor during direct connection, counteracting the force of the clamping spring. This is possible for rigid conductors, but not for stranded or multi-wire conductors.

[0004] There is a need for a spring-cage terminal connection that is self-retaining in an open position for connecting electrical conductors. It is often desired that conductor terminals be delivered with the spring-cage terminal connection open at the factory.

[0005] DE 20 2011 051 466 U1 discloses a clamping spring for a connecting terminal with a clamping leg that transitions into a first clamping device (i.e., a spring arch), to which a base leg and, after a second clamping device, a locking leg are connected. The locking leg has projections projecting from the plane of the locking leg, which form a stop for the clamping edge of the open clamping leg when the clamping leg is displaced toward the base leg against the spring force.

[0006] WO 2021 / 105280 A1 discloses a direct plug-in terminal for connecting an electrical conductor with a busbar and a clamping spring acting as a compression spring as well as a retaining spring for locking the clamping spring in an open position.

[0007] Based on this, it is the object of the present invention to provide an improved spring-loaded terminal connection and a conductor connection terminal with such a spring-loaded terminal connection.

[0008] The object is achieved with the spring-loaded terminal connection having the features of claim 1 and the conductor connection terminal having the features of claim 14. Advantageous embodiments are described in the subclaims.

[0009] It is proposed that the clamping leg has a clamping section and a holding section, wherein the holding section extends in the direction of the width of the clamping leg next to the clamping section. The clamping section is coupled to the holding section such that the holding section forms a stop for the clamping section for the clamping leg pivoted into the open position and held. The holding section is coupled to a triggering section which has a triggering surface designed for displacement by the application of force with an inserted electrical conductor to be clamped and is designed to cancel the stop by the displacement brought about by the application of force on the triggering surface in order to enable pivoting of the clamping leg by the spring force of the clamping spring with the clamping edge in the direction of the contact area of ​​the busbar into a clamping position.

[0010] The width of the clamping leg is the direction of extension of the clamping leg transverse to the longitudinal direction of the clamping leg from the spring arch to the clamping edge.

[0011] This means that the clamping section and the holding section always pivot together from the open position to the clamping position and vice versa. In the open position, the clamping edge of the clamping section is shifted away from the contact area of ​​the busbar and towards the contact leg, so that the clamping point is open for clamping an electrical conductor. In the clamping position, the clamping edge of the clamping section is shifted towards the contact area of ​​the busbar and, in the closed position, rests against the busbar without an electrical conductor, or, in the clamping position, rests against an electrical conductor arranged between the clamping edge of the clamping section and the contact area in order to clamp the electrical conductor to the contact area of ​​the busbar using the force of the clamping spring.

[0012] The clamping leg of the clamping spring comprises two parts that move relative to each other: the clamping section and the holding section. The clamping section locks into place by the holding section forming a stop for the clamping section. This allows for a material-saving, compact, and simple design.

[0013] The holding section can be configured as at least one spring clip web arranged laterally next to the clamping section. The clamping section can have a stop contour arranged between the contact leg and the spring clip web, which abuts the spring clip web in the open position.

[0014] The holding section can be designed as a frame element with a recess protruding from the spring arch. The recess is defined by two spring clip webs spaced apart from each other in the direction of the width of the clamping leg and a transverse web located away from the spring arch. The clamping section can extend through the recess.

[0015] The clamping edge can be arranged behind the holding section, viewed from the contact leg to the holding section, and the stop contour can be arranged between the contact leg and the frame element.

[0016] In the stop position, which holds the clamping leg in the open position, the spring bar can be deflected in an arc toward the contact leg. In the release position, which releases the stop and allows the clamping leg to spring back into the clamping position, the spring bar can be deflected in an arc away from the contact leg. When bending from the stop position to the release position and back, an unstable reversal position can be overcome, in which the spring bar bulges in either direction due to its spring force.

[0017] The end of the holding section can be bent away from the clamping section in the direction of the alignment line defined by the longitudinal direction of the contact leg.

[0018] The trigger section can be formed integrally with the contact leg. This allows for a material-saving, easy-to-assemble, and compact design.

[0019] The release section can be formed on a separate release element which, in the open position, can be latched or coupled to the outgoing end of the holding section. The release element extends in an arcuate or angular manner from the latching connection or coupling to the holding section of the clamping spring. The holding section can extend, approximately in continuation of the direction of extension of the contact leg, from the busbar on the side opposite the spring arc into a space into which an electrical conductor to be clamped to the contact area of ​​the busbar passes. If the spring-loaded terminal connection is accommodated in an insulating housing, a conductor collection area is formed in this space by the insulating housing.

[0020] The busbar can have a conductor feedthrough opening, and the clamping spring with the clamping section, the holding section, and the contact leg can extend into the conductor feedthrough opening. The contact leg can bear against a first end face delimiting the conductor feedthrough opening, and the busbar can have a clamping projection on a second end face of the conductor feedthrough opening. This projection extends away from the plane of the busbar defined by the conductor feedthrough opening and forms a clamping point for clamping the electrical conductor between the clamping edge of the clamping leg and the clamping projection.

[0021] The conductor feedthrough opening of the busbar can have a collar that partially or completely surrounds the conductor feedthrough opening and extends from the plane of the busbar spanned by the conductor feedthrough opening to the trigger section. This allows the trigger section to form a trigger surface for releasing the clamping spring when an electrical conductor strikes it.

[0022] The clamping projection may be formed on the collar.

[0023] A busbar can have multiple conductor through-holes, each with a clamping spring and an actuating rocker. This allows multiple electrical conductors to be clamped to a common busbar and electrically connected to each other.

[0024] The clamping spring can be a leg spring.

[0025] A spring-loaded terminal connection as described above can be installed in an insulating housing of a conductor terminal. The insulating housing can have a conductor insertion opening leading to the trigger surface of the trigger section. This guides an electrical conductor to be connected to the trigger surface to release the clamping section when plugged in, allowing the clamping leg to spring into the clamping position.

[0026] The insulating housing can have an actuating opening leading to an actuating surface of the clamping leg. The actuating opening can be designed to accommodate an actuating tool or an actuating element movably installed in the actuating opening. The actuating tool or actuating element can thus pivot the clamping leg into the open position and bend the holding section in the final movement section, which then snaps or is transferred into the stop position.

[0027] An actuating element can be installed in the actuating opening in a captive manner, e.g., by means of a positive fit. Possible actuating elements include movable pushbuttons, pivoting levers, or rotating shafts. The actuating element can be connected to the insulating housing by stop elements or bearings.

[0028] In general, in the context of this application, the words “a / an”, unless expressly defined otherwise, are not to be understood as a number, but as an indefinite article with the literal meaning of “at least one”.

[0029] The invention permits various embodiments and is described in more detail below using an exemplary embodiment. In the drawings: Fig. 1 - Side sectional view of a conductor terminal in the closed position; Fig. 2 - Front view of the conductor connection terminal Fig. 1 with the section line AA; Fig. 3 - Side sectional view of the conductor terminal from Fig. 1 in the actuated open position; Fig. 4 - Side sectional view of the conductor terminal from Fig. 3 in the self-holding open position; Fig. 5 - Side sectional view of the conductor terminal from Fig. 4 in the open position with an electrical conductor inserted shortly before tripping; Fig. 6 - Perspective view of the conductor terminal from Fig. 5; Fig. 7 - Side view of the clamping spring of the spring clamp connection for the conductor connection terminal; Fig. 8 - Front view of the clamping spring from Fig. 7; Fig. 9 - Perspective rear view of the clamping spring from Fig. 7; Fig. 10 - Perspective front view of the clamping spring from Fig. 7; Fig. 11 - Side view of a separate release element for the clamping spring from Fig. 7; Fig. 12 - Perspective view of the release element from Fig. 11.

[0030] Fig. Figure 1 shows a side sectional view of a conductor terminal 1 in the closed position. The conductor terminal 1 has an insulating housing 2 and at least one spring-loaded terminal 3.

[0031] The spring-loaded terminal connection 3 has a clamping spring 4, which has a clamping leg 5 with a clamping edge 6 at the free end of the clamping leg 5, a contact leg 7 for supporting the clamping spring 4, and a spring bend 8. The spring bend 8 connects the contact leg 7 to the clamping leg 5.

[0032] The spring-loaded terminal connection 3 further comprises a busbar 9 having a contact area 10. The clamping leg 5 of the clamping spring 4 and the contact area 10 are matched and configured such that an electrical conductor can be clamped between the clamping edge 6 and the contact area 10.

[0033] The clamping leg 5 has a clamping section 11 and a holding section 12. The holding section 12 is arranged next to the clamping section 11 in the width direction of the clamping leg 5. The clamping section 11 and the holding section 12 extend next to one another in the same direction, starting from a common root region. The clamping section 11 is coupled to the holding section 12 such that the holding section 12 forms a stop for the clamping section 11 when the clamping leg 5 is pivoted into the open position and held there.

[0034] The spring-loaded terminal connection 3 further includes a release element 13 having a triggering section 14. The triggering section 14 and the holding section 12 are configured and coordinated with one another such that the holding section 12 can be positively coupled to the triggering section 14 in the open position. The release element 13 has a triggering surface 15 designed for displacement by the application of force with an inserted, clamped electrical conductor.

[0035] The insulating housing 2 has a conductor insertion opening 16 leading to the release surface 15 of the release element 13. The conductor insertion opening 16 opens into a conductor insertion opening 17 in the busbar 9. The conductor insertion opening 17 is bordered by a collar 18 on the underside of the busbar plane opposite the spring arch 8. The collar 18 has collar side walls 19, a first collar end wall 20, and a second collar end wall 21. The first collar end wall 20 is placed obliquely into the interior of the collar 18 to form a protruding contact area 10 with a clamping projection on the collar 18. The opposite second collar end wall 21 can be used as a contact surface for the contact leg 7 protruding into the conductor insertion opening 17. The clamping leg 5 with its clamping section 11 and holding section 12 is inserted into the conductor through-hole 17.In the closed position shown, the clamping edge 6 of the clamping section 11 rests against the inner surface of the first collar end wall 20.

[0036] It can be seen that the holding section 12 is guided past the clamping section 11 in that the holding section 12 is arranged, starting from the root region, above the plane of the clamping section 11 and is then guided through the clamping section 11 or past it into a position below the plane of the clamping section 11. The free end of the clamping section 11 forms a stop for the holding section 12, which prevents further rebound of the holding section 12 towards the contact area 10.

[0037] The insulating housing 2 has a bearing pin 22, which is encompassed by the spring arch 8. Thus, the clamping spring 4 is mounted in the insulating housing 2 in a tilt-proof manner.

[0038] In addition to the conductor insertion opening 16, an actuating opening 23 is provided in the insulating housing 2. As shown, the actuating opening 23 can be separated from the conductor insertion opening 16 by a partition 24. However, an embodiment without such a partition 24 is also conceivable.

[0039] An actuating element 25 is slidably arranged in the actuating opening 23. It forms an actuating pushbutton whose free end leads to the clamping leg 5 and exerts an actuating force on the clamping leg 5 to pivot the clamping leg 5 into the open position toward the contact leg 7. For example, the actuating element 25 can act on the clamping section 11. An engagement contour 26, such as a slot, Phillips head, or recess, can be present on the upper end face of the actuating element 25, which is accessible from the outside. An actuating tool striking the upper end face thus finds hold in the engagement contour 26 and cannot slip off. Using an actuating tool, an actuating force can be exerted on the actuating element 25 in the direction of the conductor insertion opening 17 onto the clamping section 11 located transversely above it.

[0040] It can also be seen that the conductor insertion opening 16 is aligned in the conductor insertion direction L in an alignment F, which leads through the conductor insertion opening 17 in the busbar 9 to a conductor collection area 27 (conductor collection pocket) in the insulating housing 2. The release element 13 is arranged in the conductor collection area 27 and, with its release surface 15, forms a base perpendicular to the alignment F.

[0041] Fig. 2 shows a top view of the conductor connection terminal 1 from Fig. 1 with the section line AA.

[0042] The conductor insertion opening 16 opens at the top of the insulating housing 2.

[0043] Fig. 3 shows a side sectional view of the conductor connection terminal from Fig. 1 in the actuated open position.

[0044] It can be seen that the actuating element 25 rests against the clamping leg 5, for example, against the clamping section 11, and pivots it in the direction of the contact leg 7. In doing so, the holding section 12 is also pivoted.

[0045] It can be seen that the tapered end 28 of the holding section 12 is bent away from the free end of the clamping section 11 in the direction of the alignment line defined by the longitudinal direction of the end section of the contact leg 7 abutting the second collar end wall 21 or the direction of extension of the second collar end wall 21. The tapered end 28 of the holding section 12 has a transverse web 29 that delimits a recess in the holding section 12 designed as a frame element. The clamping section 11 extends through the recess.

[0046] The trigger section 14 of the release element 13 has a retaining tab 14a that projects into the recess of the retaining section 12. It forms a stop for the crossbar of the retaining section 12 and locks the retaining section 12 to the release element 13. A material tab 14b can protrude next to the retaining tab 14a, which in the open position lies next to the crossbar 29 and is aligned approximately parallel thereto.

[0047] The release element 13 is designed as a U-shaped sheet metal element. The release section 14, after a bend, transitions into the release surface 15. Following the release surface 15, a bearing section 30 is located after a bend, which is mounted on an inner wall of the conductor receiving area 27 of the insulating housing 2 and in a bearing opening 31 of the insulating housing 2. The restoring force exerted by the crosspiece 29 by the force of the clamping spring 4 is diverted into the insulating housing 2 via the retaining tab 14a of the release section 14, the release surface 15, and the bearing section 30.

[0048] The clamping section 11 rests with a stop contour on the holding section 12, which is designed as a spring clip web and forms a stop for the clamping section 11. The locking of the holding section 12 holds the clamping section 11 in the open position.

[0049] Fig. 4 shows a side sectional view of the conductor terminal from Fig. 3 in the self-holding open position.

[0050] The open position of the spring clamp connection 3 is shown in Fig. 3, so reference is made to the above comments.

[0051] The actuating element 25 is now displaced upwards away from the clamping leg 5, so that it no longer exerts any actuating force on the clamping leg 5. It can be seen that the clamping leg 5, in the open position pivoted toward the contact leg 7, engages the release section 14 of the release element 13 with the aid of the crosspiece 29 on the holding section 12. The clamping leg 5 is thus held in the open position by the release element 13.

[0052] It can be seen that the conductor insertion opening 16 opens into the conductor insertion opening 17, which leads into the conductor retention area 27. This allows an electrical conductor 32 to be inserted into the conductor insertion opening 16 and guided through the conductor insertion opening 17 into the conductor retention area 27 to strike the triggering surface 15.

[0053] Fig. 5 shows a side sectional view of the conductor connection terminal 1 from Fig. 4 in the open position with the electrical conductor 32 inserted shortly before triggering. It can be seen that the stripped free end 33 of the electrical conductor 32 strikes the triggering surface 15 with its end face, which projects into the alignment F in the conductor insertion direction L. The release element 13 is mounted on the insulating housing 2 with the bearing section 30 on the side facing away from the clamping spring 4. The side of the release element 13 opposite the bearing section 30, which has the triggering section 14, is movable. The triggering section 14 and in particular the retaining tab 14a are thus pivoted downwards away from the busbar 9 by the triggering force of the electrical conductor 32 acting in the conductor insertion direction L.This removes the stop provided by the retaining tab 14a for the crosspiece 29 of the retaining section 12 in order to allow the clamping leg 5 to pivot by the spring force of the clamping spring 4 with the clamping edge 6 in the direction of the contact area 10 of the busbar 9 into a clamping position.

[0054] Fig. 6 shows a perspective view of the conductor connection terminal 1 from Fig. 5.

[0055] It can be seen that the conductor insertion opening 16 for inserting an electrical conductor 32 through the conductor insertion opening 17 in the busbar 9 is aligned toward the release surface 15. The stripped end 33 of the electrical conductor 32 strikes the aligned release surface 15 of the release element 13. The release element 13 is arranged in the conductor receiving area 27 on the underside of the busbar 9, which is opposite the upper side facing the clamping spring 4.

[0056] Next to the conductor insertion opening 16, the actuating element 25 is arranged, which is aligned towards the clamping leg 5.

[0057] Fig. Figure 7 shows a side view of the clamping spring 4 of the spring-loaded terminal connection 3 for the conductor connection terminal 1. The clamping spring 4 is designed as a U-shaped leg spring with a contact leg 7, a clamping leg 5, and a spring bend 8 connecting the contact leg 7 to the clamping leg 5. The contact leg 7 is bent away from the clamping leg 5 at its free end in order to be able to insert into the conductor insertion opening 17 of the busbar 9 and to rest against the second collar end wall 21.

[0058] Starting from a root area, the clamping leg 5 is divided into two parts: the clamping section 11 and the holding section 12. It can be seen that, starting from the root area, the clamping section 11 initially extends between the contact leg 7 and the holding section 12 and then is guided forward past the holding section 12. The free end region of the holding section 12 is thus arranged between the contact leg 7 and the free end of the clamping section 11.

[0059] It is clear that the clamping section 11 forms a stop for the holding section 12, which prevents the holding section 12 from springing out away from the contact leg 7 and past the clamping section 11 into a position in which the free end region of the holding section 12 lies in front of the free end of the clamping section 11.

[0060] It can also be seen that the free end of the holding section 12 having the transverse web 29 is bent away from the clamping section 11 in the direction of the alignment of the extension of the contact leg 7.

[0061] Fig. 8 shows a front view of the clamping spring 4 from Fig. 7.

[0062] The clamping leg 5 is divided in a root area into a central clamping section 11 and a holding section 12 formed by two spring clip webs 12a, 12b at the edge edges. The spring clip webs 12a, 12b of the holding section 12 are connected to one another at the free end by the transverse web 29 and together define a recess 34. The clamping section 11 extends through this recess 34 and, with its widened clamping tab 35 located next to the edge webs of the holding section 12, forms a stop for the holding section 12. It can be seen that the spring clip webs 12a, 12b of the holding section 12 rest against the laterally projecting end edges 36a, 36b of the clamping tab 35. The end edge of the clamping tab 35 opposite the end edges 36a, 36b forms the clamping edge 6.

[0063] Fig. 9 shows a perspective rear view of the clamping spring 4 from Fig. 7.

[0064] It is clear that the clamping section 11 is initially bent from the root area toward the contact leg 7 and lies between the contact leg 7 and the spring clip webs 12a, 12b of the holding section. The spring clip webs 12a, 12b, together with the transverse web 29, define a recess 34 through which the clamping section 11 is guided. It can be seen that the clamping section, with its widened clamping tab 35, lies in front of the spring clip webs 12a, 12b of the holding section 12 and forms a stop for the holding section 12. The spring clip webs 12a, 12b are guided through depressions or troughs in the edge regions of the clamping section 11, so that the spring clip webs 12a, 12b of the holding section 12 form a stop for the clamping section 11 in the upper region.When an actuating force exerted by the actuating element 25 on the holding section 12 pivots the clamping leg 5 toward the contact leg 7 into the open position, the clamping section 11 is also pivoted by the stop on the holding section 12. Furthermore, the holding section 12 is carried along by the upper stop when the clamping section 11 rebounds into the clamping position.

[0065] Fig. 10 shows a perspective front view of the clamping spring 4 from Fig. 7.

[0066] It is clearly visible that the clamping section 11 extends through the recess 34 and rests with its clamping tab 35 on the spring clip webs 12a, 12b. The spring clip webs 12a, 12b extend through lateral recesses at the edge regions of the clamping section 11, so that the end edges (in particular 36a, 36b) that define the recesses form a stop.

[0067] Fig. 11 shows a side view and Fig. 12 a perspective view of a separate release element 13 for the clamping spring 4 from Fig. 7.

[0068] The Z-shaped bearing section 30, which is connected to the horizontal trigger surface 15, is clearly visible. The trigger section 14 is bent from the trigger surface 15 and terminates with the retaining tab 14a extending away from the trigger surface 15 and the adjacent material tabs 14b. The material tabs 14b extend approximately parallel to the trigger surface 15 from the opposite bearing section 30. List of reference symbols 1 conductor connection terminal 2 insulating housings 3 spring-loaded terminal connection 4 clamping spring 5 clamping legs 6 clamping edge 7 investment legs 8 spring bows 9 Busbar 10 Contact area 11 Clamping section 12 holding section 12a Spring bar 12b Spring bar 13 Release element 14 Trigger section 14a retaining tab 14b Material rag 15 trigger area 16 Conductor entry opening 17 Conductor through-hole 18 collars 19 collar side walls 20 first collar end wall 21 second collar end wall 22 bearing journals 23 Operating opening 24 Partition wall 25 Actuating element 26 engagement contour 27 Ladder catch area 28 expiring end 29 Crossbar 30 storage section 31 Warehouse opening 32 electrical conductors 33 stripped end 34 Recess 35 clamping tabs 36a front edge 36b front edge F Escape L Conductor insertion direction QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2011 051 466 U1

[0005] WO 2021 / 105280 A1

[0006]

Claims

[1] Spring clamp connection (3) with - a clamping spring (4) having a clamping leg (5) with a clamping edge (6) at the free end of the clamping leg (5), a contact leg (7) for supporting the clamping spring (4), and a spring arch (8) connecting the contact leg (7) to the clamping leg (5), and - a busbar (9) having a contact area (10), wherein the clamping leg (5) with its clamping edge (6) and the contact area (10) are designed for clamping an electrical conductor (32) between the clamping edge (6) and the contact area (10), and - a locking section which has a holding contour and is designed to lock the clamping leg (5) pivoted into an open position away from the contact area (10) of the busbar (9), characterized bythat the clamping leg (5) has a clamping section (11) and a holding section (12), wherein the holding section (12) extends in the direction of the width of the clamping leg (5) next to the clamping section (11), wherein the clamping section (11) is coupled to the holding section (12) such that the holding section (12) forms a stop for the clamping section (11) for the clamping leg (5) pivoted into the open position and held, wherein the holding section (12) is coupled to a triggering section (14) which has a triggering surface (15) designed for displacement by the application of force with an inserted electrical conductor (32) to be clamped and is designed to cancel the stop by the displacement brought about by the application of force on the triggering surface (15),to enable the clamping leg (5) to pivot into a clamping position by the spring force of the clamping spring (4) with the clamping edge (6) in the direction of the contact area (10) of the busbar (9). [2] Spring-loaded terminal connection (3) according to claim 1, characterized by that the holding section (12) is at least one spring clip web (12a, 12b) arranged laterally next to the clamping section (11) and the clamping section (11) has a stop contour arranged between the contact leg (7) and the spring clip web (12a, 12b), which in the open position strikes the spring clip web (12a, 12b). [3] Spring-loaded terminal connection (3) according to claim 1 or 2, characterized bythat the holding section (12) is a frame element projecting from the spring arch (8) with a recess (34) delimited by two spring clip webs (12a, 12b) spaced apart from one another in the direction of the width of the clamping leg (5) and a transverse web (29) located away from the spring arch (8), wherein the clamping section (11) extends through the recess (34). [4] Spring-loaded terminal connection (3) according to claim 2 or 3, characterized by that the clamping edge (6) is arranged behind the holding section (12) as seen from the contact leg (7) to the holding section (12) and the stop contour is arranged between the contact leg (7) and the frame element (12a, 12b, 29). [5] Spring-loaded terminal connection (3) according to one of claims 2 to 4, characterized byin that the spring clip web (12a, 12b) is deflected in an arcuate manner towards the contact leg (7) in the stop position holding the clamping leg (5) in the open position and is deflected in an arcuate manner away from the contact leg (7) in the release position releasing the stop, through which the clamping leg (5) can spring back into the clamping position, wherein during the bending from the stop position into the release position and back, an unstable reversal position is overcome in which the spring clip web (12a, 12b) bulges either in one direction or the other due to its spring force. [6] Spring-loaded terminal connection (3) according to one of claims 1 to 5, characterized by that the outgoing end of the holding section (12) is bent away from the clamping section (11) in the direction of the alignment line defined by the longitudinal direction of the contact leg (7). [7] Spring-loaded terminal connection (3) according to one of claims 1 to 6, characterized bythat the triggering section (14) is formed integrally on the contact leg (7). [8] Spring-loaded terminal connection (3) according to one of claims 1 to 7, characterized by that the triggering section (14) is formed on a separate release element (13) which can be latched to the end of the holding section (12), the release element (13) extending from the latching connection with the holding section (12) away from the clamping spring (4) in an arcuate or angular manner from the busbar (9). [9] Spring-loaded terminal connection (3) according to claim 8, characterized byin that the busbar (9) has a conductor through-opening (17) and the clamping spring (4) with the clamping section (11), the holding section (12) and the contact leg (7) projects into the conductor through-opening (17), wherein the contact leg (7) bears against a second collar end wall (21) delimiting the conductor through-opening (17) and the busbar (9) has a contact projection on a first collar end wall (20) of the conductor through-opening (17), which contact projection extends away from the plane of the busbar (9) spanned by the conductor through-opening (17) and forms the contact region (10) for clamping the electrical conductor (32) between the clamping edge (6) of the clamping leg (5) and the clamping projection. [10] Spring-loaded terminal connection (3) according to one of the preceding claims, characterized bythat the conductor through-opening (17) of the busbar (9) has a collar (18) which partially or completely delimits the conductor through-opening (17) and extends from the plane of the busbar (9) spanned by the conductor through-opening (17) to the triggering section (14). [11] Spring-loaded terminal connection (3) according to claim 10, characterized by that the contact projection is formed on the collar (18). [12] Spring-loaded terminal connection (3) according to one of the preceding claims, characterized by that a busbar (9) has several conductor through-openings (17), each with a clamping spring (4) and a release element (13) arranged thereon. [13] Spring-loaded terminal connection (3) according to one of the preceding claims, characterized by that the clamping spring (4) is a leg spring. [14] Conductor connection terminal (1) with an insulating housing (2) and with a spring-loaded clamp connection (3) according to one of the preceding claims in the insulating housing (2), wherein the insulating housing (2) has a conductor insertion opening (16) leading to the triggering surface of the triggering section (14). [15] Conductor connection terminal (1) according to claim 14, characterized by that the insulating housing (2) has an actuating opening (23) which leads to an actuating surface of the clamping leg (5). [16] Conductor connection terminal (1) according to claim 15, characterized by that the actuating opening (23) is designed to receive an actuating tool or an actuating element (25) movably installed in the actuating opening (23).

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