Conductor terminal block and spring-loaded terminal block

Abstract

Conductor terminal (1) with an insulating housing (3) and a spring clamp connection, wherein the spring clamp connection has: - a busbar (4), - a clamping spring (5) comprising a support leg (10), a clamping leg (12) having a clamping edge (17a) for clamping an electrical conductor (16) at a clamping point, a spring arc (11) connecting the support leg (10) with the clamping leg (12), and an actuating leg (13) extending from the clamping leg (12) to the support leg (10) and past the support leg (10), and - an actuating element (2) which engages with the actuating leg (13) and is designed to displace the actuating leg (13) when the actuating element (2) is displaced, characterized in that the confirming leg (13) is mechanically coupled to the actuating element (2) to transmit a force acting on the actuating element (2), wherein the actuating element (2) has: - an actuating end (19, 30) which is accessible from outside the insulating housing (3) and can be actuated with an actuating force to displace the actuating element (2), - an inner end arranged within the insulating housing (3), - an actuating section (18, 31) arranged between the actuating end (19, 30) and the inner end, wherein - the actuating section (18, 31) is guided past the actuating leg (13), wherein the actuating section (18, 31) is received at least partially in the space on the side of the actuating leg (13) facing away from the spring bow (11), at least when actuated.

Description

[0001] The invention relates to a conductor connection terminal with an insulating housing and a spring clamp connection, wherein the spring clamp connection has: - a busbar, - a clamping spring having a contact leg, a clamping leg having a clamping edge for clamping an electrical conductor at a clamping point, a spring arch connecting the contact leg to the clamping leg, and an actuating leg extending from the clamping leg to the contact leg and past the contact leg, and - an actuating element which engages with the actuating arm and is designed to displace the actuating arm when the actuating element is displaced.

[0002] The invention further relates to a spring clamp connection with - a busbar that spans a busbar plane, - a clamping spring having a contact leg, a clamping leg having a clamping edge for clamping an electrical conductor at a terminal point, and a spring arch connecting the contact leg to the clamping leg, and - an actuating element which engages with the clamping spring and is designed to displace the clamping leg when the actuating element is displaced.

[0003] EP 2 843 764 B1 discloses a spring-loaded terminal for connecting a stranded conductor, comprising a housing, a busbar arranged therein, and a clamping spring acting as a compression spring. The clamping spring has a clamping leg pivotable about a pivot axis in a pivoting direction. The clamping leg can be adjusted by moving the electrical conductor from a latched state, in which it is latched to a holding means, to a clamped state, in which it is released from the holding means and presses the electrical conductor against the busbar. A sliding sleeve is provided, which serves as an insertion aid for the conductor.

[0004] EP 3 714 511 B1 discloses a spring-loaded terminal for connecting an electrical conductor, comprising a spring element and an actuating element that acts on the spring leg of the spring element. Furthermore, an adjusting element is provided that can be adjusted from a first to a second position in order to transfer the actuating element for moving the spring leg from an initial position to a release position. In the second position, the adjusting element is locked relative to the contact element and has a release section that releases the locking of the adjusting element through the action of the inserted electrical conductor.

[0005] The object of the present invention is to provide an improved conductor connection terminal and an improved spring-loaded terminal connection in which an easy-to-operate opening and closing of the clamping spring is made possible with an actuating element.

[0006] The object is achieved with the conductor connection terminal having the features of claim 1 and with the spring-loaded terminal connection having the features of claim 8. Advantageous embodiments are described in the subclaims.

[0007] It is proposed that the actuating leg is mechanically coupled to the actuating element for transmitting a force acting on the actuating element, wherein the actuating element comprises: - an actuating end which is accessible from outside the insulating housing and can be subjected to an actuating force to move the actuating element, - an inner end arranged within the insulating housing, - an actuating portion disposed between the actuating end and the inner end, wherein - the actuating section is guided past the actuating leg, wherein the actuating section is at least partially received in the space on the side of the actuating leg facing away from the spring arch, at least in the actuated state.

[0008] Passing the actuating section past the actuating leg not only means passing it laterally, but also passing it through a receiving opening that is formed in the plane of the actuating section. Such a receiving opening can be an opening enclosed on all sides or a recess that is only partially enclosed.

[0009] The inner end can be designed as a free end that is displaced upon actuation. Thus, in a displaceably mounted actuating element, the free end can be displaced in the direction of the actuating force, i.e., the actuation direction.

[0010] The inner end can also be designed as a bearing end and form a bearing for the actuating element. Thus, a pivotable actuating element can be pivotally mounted on the insulating housing and / or the busbar at the bearing end.

[0011] The actuating arm can be designed as a flat spring band section. However, it is also conceivable for the actuating section to have a different cross-sectional profile, such as a T-shaped profile.

[0012] The actuating element can be mounted on the busbar with one bearing end. It can be pivotable with an actuating end diametrically opposite the bearing end, with the actuating leg located between the bearing end and the actuating end of the actuating element.

[0013] The actuating arm is thus spaced apart, preferably essentially parallel, from the busbar plane. This creates a lever arm for the actuating element mounted on the busbar plane, which then moves the actuating arm with good force transfer, similar to an actuating lever. For this purpose, the actuating end is positioned on the opposite side of the inner bearing end.

[0014] It is advantageous if a contact busbar section extends from the busbar plane to the clamping spring. The contact leg can be supported on the contact busbar section. The contact busbar section, together with the clamping end of the clamping leg, forms the clamping point for clamping the electrical conductor.

[0015] This provides a self-supporting spring-loaded terminal connection.

[0016] The contact busbar section can have a first end wall on which the contact leg is mounted. It can also be provided with a second end wall, which has a clamping section for clamping the electrical conductor between the clamping end of the clamping leg and the clamping section. The two end walls can protrude from the busbar plane and be spaced apart from each other and each connected to the busbar plane.

[0017] This creates a self-supporting structure in which the force of the clamping spring acts between the two end walls. The space between the two end walls can be used to accommodate a retaining element that holds the clamping spring in an open position. The retaining element is designed to be movable by means of an inserted electrical conductor to release the clamping spring.

[0018] The contact rail piece may have a side wall which connects the first and second end walls and also protrudes from the busbar plane.

[0019] The contact rail section thus defines a space that is also limited by the busbar plane and can be used to position an open-holding element.

[0020] In addition, this can achieve a further stabilized construction of the contact rail piece and a further improved current conduction in the contact rail piece.

[0021] The contact leg can be guided through the actuating leg or can be guided laterally past the actuating leg.

[0022] A spring-elastic holding element can be supported by a support leg on the busbar plane and have a holding section which has a holding contour for holding the clamping leg open in an open position by forming a stop.

[0023] In a generic spring clamp connection, a contact busbar section can extend from the busbar plane to the clamping spring. The contact busbar section can have a first and a second end wall. The contact leg can be supported on the first end wall. The second end wall has a clamping section for clamping the electrical conductor between the clamping end of the clamping leg and the clamping section. The two end walls can protrude from the busbar plane and be spaced apart from one another and each connected to the busbar. A spring-elastic holding element can be arranged between the two end walls. This holding element can be supported by a support leg on the busbar plane and have a holding section that has a holding contour for holding the clamping leg open in an open position by forming a stop.

[0024] This allows the clamping spring to be propped up by the contact busbar section. The retaining element for keeping the clamping spring open, for example, in the delivery state and for automatically releasing the clamping spring when an inserted electrical conductor is to be clamped, can be stored in the space between the contact busbar section on the busbar.

[0025] Deviation from the plane means that the end walls point away from the busbar plane at an angle, preferably perpendicularly. "Perpendicular" is not to be understood as strictly perpendicular, but rather as a right angle of 90° with a tolerance within a functionally acceptable angular range of, for example, a maximum of ± 30°. Thus, an arrangement perpendicular to the busbar plane can cover a preferred angular range of 60° to 120°.

[0026] The actuating element can, for example, be a displaceably mounted actuating push button or a pivotably mounted actuating lever.

[0027] The spring-elastic holding element can be designed as a loop spring with a spring arch connecting the support leg to the holding section.

[0028] The contact rail piece may have a side wall which connects the first and second end walls and also protrudes from the busbar plane.

[0029] The conductor terminal has an insulating housing and a spring-loaded connection as described above. The insulating housing has a conductor entry opening leading to the terminal point and an actuating opening designed to accommodate the actuating element.

[0030] For the purposes of the present invention, the indefinite term "a" is not to be understood as a numerical term. Therefore, if, for example, a component is mentioned, this should be interpreted as "at least one component." Angles expressed in degrees refer to a circle of 360 degrees (360°).

[0031] The invention is described below using exemplary embodiments. They show: Fig. 1 - Side sectional view of a first embodiment of a conductor connection terminal with pivotable actuating element in the closed position; Fig. 2 - Side sectional view of a first embodiment of a conductor connection terminal with pivotable actuating element in the open position; Fig. 3 - Top view of the spring clamp connection from Fig. 1 and Fig. 2; Fig. 4 - Side sectional view of a second embodiment of a conductor terminal with a movable actuating element in the closed position; Fig. 5 - Side sectional view of a second embodiment of a conductor connection terminal with a movable actuating element in the open position.

[0032] Fig. Figure 1 shows a side sectional view of a first embodiment of a conductor terminal 1 with a pivotable actuating element 2 in the closed position. The conductor terminal 1 has an insulating housing 3 and a spring-loaded terminal connection comprising a busbar 4 and a clamping spring 5.

[0033] In the illustrated embodiment, the busbar 4 spans a busbar plane 6, from which a contact busbar section protrudes. The contact busbar section has a first end wall 7 extending from the busbar plane 6 to the clamping spring 5 and, at a distance therefrom, a second end wall 8 extending essentially parallel to the first end wall 7. The contact busbar section can further have a side wall 9 which connects the first and second end walls 7, 8 to one another and also protrudes from the busbar plane 6. This creates a U-shaped enclosed receiving space which is delimited at the bottom by the busbar plane 6.

[0034] The clamping spring 5 is designed as a U-shaped, bent leg spring with a contact leg 10, a spring arch 11 adjoining the contact leg 10, and a clamping leg 12 adjoining the spring arch 11. The spring arch 11 connects the contact leg 10 to the clamping leg 12. An actuating leg 13 protrudes from the clamping leg 12 in the direction of the contact leg 10. The actuating leg 13 is guided past the contact leg 10. For this purpose, the contact leg 10 can be guided through the actuating leg 13 or laterally past the actuating leg 13.

[0035] The clamping spring 5 can be accommodated in a curved free space adapted to the spring arch 11 between a curved wall section of the insulating housing 3 and a guide pin 14 of the insulating housing 3.

[0036] The insulating housing 3 has a conductor insertion opening 15 for inserting an electrical conductor 16 to a terminal point in order to clamp it to the busbar 4 with the clamping spring 5.

[0037] A clamping end 17 of the clamping leg 12 pointing towards the second end wall 8, which has a clamping edge 17a at the free end, forms together with that of the second end wall 8 a clamping point for clamping an electrical conductor 16 between the clamping edge of the clamping end 17 of the clamping leg 12 and a clamping section of the second end wall 8.

[0038] In the closed position shown, the clamping spring 5 is extended by its spring force such that the clamping end 17 is located at or directly next to the second end wall 8. If an electrical conductor 16 is now arranged with its stripped end between the second end wall 8 and the clamping end 17, a spring force is exerted by the clamping spring 5 on the electrical conductor 16 in order to connect it in an electrically conductive manner to the second end wall 8 of the busbar 4. The clamping end 17 thereby wedges itself with its clamping edge 17a against the stripped end of the electrical conductor 16 in order to also mechanically hold it and secure it against being pulled out.

[0039] To open the clamping point, the clamping leg 12 must be moved toward the contact leg 10 against the spring force of the clamping spring 5. To do this, an actuating force is exerted on the actuating leg 13 using the actuating element 2, which pulls the clamping leg 12 toward the contact leg 10.

[0040] The contact leg 10 is supported on the first end wall 7. The actuating leg 13 can be guided along the upper end face of the first end wall 7. The clamping spring 5 is thus mounted on the first end wall 7 and the insulating housing 1.

[0041] In the illustrated embodiment, the actuating element 2 is designed as a pivotably mounted actuating lever with an actuating arm forming the actuating section 18 and an actuating head 19 protruding from the insulating housing 3. The actuating head 19 is arranged at the actuating end of the actuating element 2, which is accessible from outside the insulating housing 3. The actuating section 18 extends with its inner end into a bearing opening 21 in the busbar plane 6. The inner end lies diametrically opposite the actuating end with the actuating head 19 in the extension of the actuating element 2. As a result, the actuating element 2 is pivotally mounted on the busbar 4. The actuating leg 13 has a receiving opening 20 through which the actuating arm is guided with its actuating section 18 located between the inner end and the actuating end.

[0042] A user can move the actuating head 19 in the displacement direction V to pivot the actuating element 2, which is accommodated in an actuating opening 22 of the insulating housing 3, away from the clamping spring 5. The engagement of the actuating section 18 in the actuating leg 13 displaces the actuating leg 13, as indicated by the dashed line at the end of the actuating leg 13. The clamping end 17 is thus moved in the direction of the arrow into the open position.

[0043] On the busbar plane 6, a spring-elastic holding element 23 is accommodated between the first and second end walls 7, 8. The holding element 23 has a support leg 24, which rests on the busbar plane 6 and transitions into a holding section 25. The holding section 25 has a holding contour 26 projecting toward the clamping spring 5, which forms a stop for the clamping end 17 in the open position. This is indicated by the dashed position of the clamping end 17 in the open position. The clamping spring 5 can thus be held open using the holding element 23.

[0044] The holding element 23 has a release section 27, which is aligned F with the conductor insertion opening 15. A stripped end of the electrical conductor 16, inserted into the conductor insertion opening 15 and guided along the second end wall 8, thus strikes the release section 27 to displace it toward the contact leg 24 of the holding element 23. This removes the stop formed by the holding contour 26 for the terminal end 17 to be clamped, and the clamping leg 12 can move unhindered away from the contact leg 10 into the closed position due to the force of the clamping spring 5.

[0045] The retaining element 13 itself can be formed from a resilient material to spring into the locking position shown. Alternatively or additionally, a return force into the locking position can be effected by a return spring 28, which is mounted on the busbar plane 6 or the contact leg 24 and rests on the opposite side against the underside of the retaining leg 25. The return spring 28, acting as a compression spring, thus forces the retaining contour toward the clamping spring 5 in order to lock the clamping end 17, pivoted into the open position, onto the retaining element 23.

[0046] Fig. Figure 2 shows a side sectional view of the first embodiment of a conductor connection terminal 1 in the open position. The actuating element 2 is pivoted away from the clamping spring 5 in the pivoting direction V. This displaces the actuating leg 13 (to the right as viewed) and pulls the clamping leg 5 toward the contact leg 10. The clamping end 17 of the clamping leg 12 thereby pivots into the open position behind the retaining contour 26 of the retaining element 23. The retaining contour 26 thus forms a stop for the clamping end 17, and the clamping spring 5 is held in the open position shown.

[0047] It can also be seen that the actuating element 2 is bent behind the actuating section 18 towards the actuating end. For the pivoting angle of the actuating element 2 around the bearing point L, the displacement path for the actuating head 19 becomes increasingly larger with increasing radius. Because the actuating element 2 is bent behind the actuating leg 13 in the direction of the conductor insertion opening 15, as seen from the bearing point L, the displacement path of the actuating head 19 in the displacement direction V can be displaced in the conductor insertion direction. In addition, the space of the insulating housing 3 above the spring arch 11 next to the conductor insertion opening 15 can be used at least partially to accommodate the actuating end of the actuating element 2, which ends at the actuating head 19. This enables a somewhat more compact design of the conductor connection terminal 1 in the width direction (i.e. in the Fig. 1 and Fig. 2 from left to right).

[0048] To clamp an electrical conductor 16, it is inserted into the conductor entry opening 15 and the stripped end of the electrical conductor 16 is guided between the second end wall 8 and the clamping leg 12 with its open clamping end 17. The end of the electrical conductor 16 then strikes the release section 27 positioned in alignment F of the conductor entry opening 15 and is pushed out by a release force in the direction of the support leg 24. This displaces the release section 27 together with the associated holding contour 26 to the busbar plane 6 and the clamping end 17 is released. This becomes clear by comparing the distance between the release section 27 and the support leg 24, which in the closed position is Fig. 1 less than in the open position of the Fig. 2 is.

[0049] The actuating element 2 is displaced by applying a compressive or tensile force from the outside, for example with the user's hand, to the actuating head 19 in a direction transverse to the alignment F of the extension direction of the conductor insertion opening 15 or parallel to the busbar plane 6 or transverse to the extension direction of the actuating section 18. The force acting on the actuating head 19 is approximately parallel to the extension direction of the actuating leg 13 to be displaced.

[0050] “Transverse” in the sense of the invention does not mean exactly perpendicular or 90°, but rather less parallel than transverse (90° ±45°, in particular 90° ±20°).

[0051] Fig. 3 shows a plan view of the spring clamp connection of the conductor connection terminal 1 from Fig. 1 and Fig. 2. It can be seen that the contact leg 10 is mounted on one side of the second end wall and the actuating section 18 is arranged on the other side. It is clear that the actuating element 2 dips with its inner end into the bearing opening 21 in order to be mounted there. It can also be seen that the busbar 4 has a busbar plane 6, from which a contact busbar piece protrudes, which is formed from the spaced-apart first and second end walls 7, 8 and the side wall 9 connecting the two end walls 7, 8. The side wall 9 is positioned laterally on the edge of the long side of the busbar plane 9. The first and second end walls 7, 8 extend transversely to the long extent of the busbar plane 9. This creates a U-shaped contact busbar piece.

[0052] Fig. Figure 4 shows a side sectional view of a second embodiment of a conductor terminal 1 with the actuating element 2 in the closed position. The actuating element 2 is designed as a movable actuating pushbutton 29.

[0053] The structure of the clamping spring 5 and the holding element 23 is comparable with the first embodiment, so that the description of the Fig. 1 and Fig. 2, which is responsible for the Fig. 3 and Fig. 4 applies equally.

[0054] The second embodiment differs in the design and operation of the actuating element 2. This is mounted as an actuating pushbutton 29 for displacement in the actuating opening 22 of the insulating housing 3. The actuating pushbutton 29 has a pushbutton head 30 that merges into a conically tapered actuating section 31. The pushbutton head 30 forms the actuating end accessible from outside the insulating housing 3, which can be subjected to an actuating force to displace the actuating element 2. The conically tapered end of the actuating pushbutton 29, diametrically opposite the pushbutton head 30, forms the inner end, which is arranged within the insulating housing 3. The actuating section 31 of the actuating pushbutton 29, located between the inner end and the pushbutton head 30, passes through the receiving opening 20 of the actuating leg 13.Due to the conically tapered contour of the actuating section 31, the actuating leg 13 is displaced transversely to the displacement direction V of the actuating pushbutton 29 when the latter rests against the edge bordering the receiving opening 20 and remote from the first end wall 7. On the side of the actuating pushbutton 29 opposite this contact with the edge, the actuating pushbutton 29 can be supported on the first end wall 7. The first end wall 7 thus forms a guide wall for the actuating pushbutton 29.

[0055] The actuating lever 29 is displaced by applying a compressive force from the outside, for example using an actuating tool (e.g., a screwdriver), to the lever head 30 in the direction of the busbar plane 9. The force acting on the lever head 30 is approximately transverse to the direction of extension of the actuating arm 13 to be displaced.

[0056] Fig. 5 shows a side sectional view of the second embodiment of the conductor connection terminal 1 with the movable actuating button 29 in the open position.

[0057] It can be seen that the actuating button 29 is now shifted in the direction of displacement V towards the busbar level 9. This means that, in comparison to Fig. 4 the wider part of the conically tapered contour of the actuating section 31 in the receiving opening 20 of the actuating leg 13. This exerts a force on the actuating leg 13, by which the clamping leg 12 is pulled towards the contact leg 10. This opens the clamping point and the clamping end 17 passes behind the holding contour 26 of the holding element 23, which forms a stop. The clamping spring 5 is held in the open position by the holding element 23, as already shown in the first embodiment in Fig. 2 was described.

[0058] The busbar level 6 and the insulating housing can optionally have a receiving space 32 through an opening and recess or trough to allow, depending on the design of the actuating pushbutton 29, a downward displacement of the actuating pushbutton 29 beyond the busbar level 9. This is not required in the illustrated embodiment, but is conceivable in principle. List of reference symbols 1 conductor connection terminal 2 Actuating element 3 Insulated housing 4 busbar 5 clamping spring 6 busbar level 7 first front wall 8 second front wall 9 Side wall 10 investment legs 11 spring bow 12 clamping legs 13 operating legs 14 guide bolts 15 Conductor entry opening 16 electrical conductors 17 terminal ends 17a clamping edge 18 Operating section 19 Actuating head 20 Recording opening 21 Warehouse opening 22 Operating opening 23 Holding element 24 support legs 25 stopping section 26 Holding contour 27 Trigger section 28 Return spring 29 operating buttons 30 pusher head 31 Operating section 32 recording room F Escape L bearing point V Swivel 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] EP 2 843 764 B1

[0003] EP 3 714 511 B1

[0004]

Claims

[1] Conductor connection terminal (1) with an insulating housing (3) and a spring-loaded terminal connection, wherein the spring-loaded terminal connection has: - a busbar (4), - a clamping spring (5) having a contact leg (10), a clamping leg (12) having a clamping edge (17a) for clamping an electrical conductor (16) at a clamping point, a spring arch (11) connecting the contact leg (10) to the clamping leg (12), and an actuating leg (13) extending from the clamping leg (12) to the contact leg (10) and past the contact leg (10), and - an actuating element (2) which engages with the actuating leg (13) and is designed to displace the actuating leg (13) when the actuating element (2) is displaced, characterized bythat the actuating leg (13) is mechanically coupled to the actuating element (2) for transmitting a force acting on the actuating element (2), wherein the actuating element (2) comprises: - an actuating end (19, 30) which is accessible from outside the insulating housing (3) and can be subjected to an actuating force in order to displace the actuating element (2), - an inner end arranged within the insulating housing (3), - an actuating section (18, 31) arranged between the actuating end (19, 30) and the inner end, wherein - the actuating section (18, 31) is guided past the actuating leg (13), wherein the actuating section (18, 31) is at least partially received in the space on the side of the actuating leg (13) facing away from the spring arch (11), at least in the actuated state. [2] Conductor connection terminal (1) according to claim 1, characterized bythat the actuating element (2) is mounted with a bearing end on the busbar (4) and is pivotable with an actuating end (19) which is diametrically opposite the bearing end, wherein the actuating leg (13) lies between the bearing end and the actuating end (19) of the actuating element (2). [3] Conductor connection terminal (1) according to claim 1 or 2, characterized by that a contact busbar piece extends from the busbar plane (6) to the clamping spring (5), wherein the contact leg (10) is supported on the contact busbar piece and the contact busbar piece together with the clamping end (17) of the clamping leg (12) forms the clamping point for clamping the electrical conductor (16). [4] Conductor connection terminal (1) according to claim 3, characterized byin that the contact busbar piece has a first end wall (7) on which the contact leg (10) is supported, and a second end wall (8) which has a clamping section for clamping the electrical conductor (16) between the clamping end (17) of the clamping leg (12) and the clamping section, wherein the two end walls (7, 8) protrude from the busbar plane (6) and are spaced apart from one another and are each connected to the busbar (4). [5] Conductor connection terminal (1) according to claim 4, characterized by that the contact rail piece has a side wall (9) which connects the first and second end walls (7, 8) to one another and also projects from the busbar plane (6). [6] Conductor connection terminal (1) according to one of the preceding claims, characterized by that the contact leg (10) is guided through the actuating leg (13) or is guided laterally past the actuating leg (13). [7] Conductor connection terminal (1) according to one of the preceding claims, characterized by that a spring-elastic holding element (23) with a support leg (24) is supported on the busbar plane (6) and has a holding section (25) which has a holding contour for holding the clamping leg (12) open in an open position by forming a stop. [8] Spring clamp connection with - a busbar (4) spanning a busbar plane (6), - a clamping spring (5) having a contact leg (10), a clamping leg (12) having a clamping edge (17a) for clamping an electrical conductor (16) at a clamping point, and a spring arch (11) connecting the contact leg (10) to the clamping leg (12), and - an actuating element (2) which engages with the clamping spring (5) and is designed to displace the clamping leg (12) when the actuating element (2) is displaced, characterized byin that a contact busbar piece extends from the busbar plane (6) to the clamping spring (5), wherein the contact busbar piece has a first end wall (7) on which the contact leg (10) is supported, and a second end wall (8) which has a clamping section for clamping the electrical conductor (16) between the clamping end of the clamping leg (12) and the clamping section, wherein the two end walls (7, 8) protrude from the busbar plane (6) and are spaced apart from one another and are each connected to the busbar (4), and in that a spring-elastic holding element (23) is arranged between the two end walls (7, 8) and is supported by a support leg (24) on the busbar plane (6) and has a holding section (25) which has a holding contour for holding the clamping leg (12) open in an open position by forming a stop. [9] Spring clamp connection according to claim 8, characterized bythat the actuating element (2) is a displaceably mounted actuating push button (29) or a pivotably mounted actuating lever. [10] Spring clamp connection according to claim 8 or 9, characterized by that the spring-elastic holding element (23) is designed as a loop spring with a spring arch connecting the support leg (24) to the holding section (25). [11] Spring clamp connection according to claim 8 or 9, characterized by that the contact rail piece has a side wall (9) which connects the first and second end walls (7, 8) to one another and also projects from the busbar plane (6). [12] Conductor connection terminal (1) with an insulating housing (3) and with a spring-loaded clamp connection according to one of claims 8 to 11 in the insulating housing (3), wherein the insulating housing (3) has a conductor insertion opening (15) leading to the clamping point and an actuating opening (22) designed to receive the actuating element (2).

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