conductor connection terminal

Abstract

Conductor connection terminal (1) with an insulating housing (2) which has at least one conductor insertion opening (20) for receiving an electrical conductor (9) in a conductor insertion direction (L), wherein at least one spring-loaded clamping connection is arranged in the insulating housing (2), which is designed to connect an electrical conductor (9) by means of spring force, wherein the spring-loaded clamping connection has at least one busbar (3) and a clamping spring (4) which has a clamping leg (43) with a clamping edge (46) for clamping an electrical conductor (9) at a clamping point (30) on a contact section (31) of the busbar (3), and with a holding element (5) which is designed to hold the clamping leg (43) in an open position, characterized in that the clamping spring (4) has a support section (82), wherein the holding element (5) is supported on a housing base (22) of the insulating housing (2) via the support section (82).

Description

[0001] The invention relates to a conductor connection terminal with an insulating housing which has at least one conductor insertion opening for receiving an electrical conductor in a conductor insertion direction, wherein at least one spring-loaded clamping connection is arranged in the insulating housing, which is designed to connect an electrical conductor by means of spring force, wherein the spring-loaded clamping connection has at least one busbar and a clamping spring which has a clamping leg with a clamping edge for clamping an electrical conductor at a clamping point on a contact section of the busbar, and with a holding element which can be formed integrally with the clamping spring and is designed to hold the clamping leg in an open position.

[0002] Such a conductor terminal is known from DE 10 2020 119 372 A1. It is a conductor terminal with automatic connection of the electrical conductor to be clamped when it is inserted into the conductor terminal. Inserting the electrical conductor automatically releases the clamping leg of the clamping spring, which is held in an open position, thereby clamping the electrical conductor.

[0003] Based on this, it is the object of the present invention to provide a further improved conductor connection terminal.

[0004] This task is achieved by the clamping spring having a support section, with the retaining element being supported by the support section on a housing base of the insulating housing. This allows for reliable positioning of the retaining element, so that it reliably holds the clamping leg, even when external mechanical influences act on the conductor terminal. This prevents unwanted premature release of the clamping leg.

[0005] Such a design with such a retaining element allows the integration of automatic release technology into spring-loaded terminals and conductor terminals of various designs. In particular, proven conductor terminals of known designs can be upgraded with minimal effort to include automatic release functionality, i.e., with automatic connection of the electrical conductor to be clamped.

[0006] The retaining element can, for example, be supported by the support section on the housing base of the insulating housing against the force acting on the retaining element from the clamping leg in the open position. The retaining element can have a locking element that is spring-loaded by the clamping leg in the open position and can be locked to the clamping leg.

[0007] The holding element can be arranged so as to be movable, e.g. displaceable, pivotable or deflectable in some other way, so that it can be slightly deflected by the inserted conductor in order to bring about the desired release effect of the clamping leg from the holding element. The holding element can, for example, be mounted so as to be displaceable, e.g. displaceable in a linear direction or an arcuate direction. The holding element can be mounted so as to be pivotable. In this case, the holding element can be pivoted about a fixed or variable pivot axis. In the case of a variable pivot axis, the holding element can, for example, be mounted so as to be floating and pivotable. The holding element can also be mounted so as to be movable in some other way so that it can be deflected sufficiently far to release the locking of the clamping leg on the holding element.

[0008] The spring-loaded terminal connection can have an actuating mechanism for actuating the clamping leg. This actuating mechanism allows the clamping leg to be moved into the open position when manually actuated, counter to the spring force of the clamping spring. In this open position, the clamping leg can then be held by the retaining element, particularly without further manual actuation of the actuating mechanism, allowing the electrical conductor to be inserted at any time without any particular effort. For example, the clamping leg can be locked to the retaining element in the open position.

[0009] The clamping leg, together with the contact section of the busbar, can form a clamping point for clamping an electrical conductor between the clamping leg and the contact section. In the open position, at least the clamping edge of the clamping leg is pivoted away from the contact section of the busbar. The clamping leg can be pivoted, for example, between an open position, in which the electrical conductor is freely movable between the clamping leg and the contact section, and a clamping position, in which the clamping leg clamps the electrical conductor to the contact section.

[0010] The retaining element can, for example, act directly on the clamping leg to hold it in the open position. For example, a first locking element can be arranged on the clamping leg and a second locking element on the retaining element, with the first and second locking elements being lockable together in the open position. The first locking element can be designed as a locking projection or locking hook. The second locking element can be designed as a locking edge or locking opening.

[0011] The holding element can also be present as a separate component, which is attached, for example, to an insulating housing of a conductor connection terminal, to the busbar or to another component.

[0012] According to an advantageous embodiment of the invention, at least one retaining tab is formed on the retaining element, which extends toward its free end opposite to the conductor insertion direction toward the free end of the clamping leg, so that the clamping leg can be secured to the retaining tab in the open position. Such a construction, in particular a clamping spring formed integrally with the retaining element, allows the integration of automatic release technology in spring-loaded terminal connections and conductor connection terminals of various designs.

[0013] According to an advantageous embodiment of the invention, the spring-loaded terminal connection has a release element with a release section, the actuation of which allows the holding element to be deflected to such an extent that the clamping leg held on the holding element releases from the holding element. For example, the clamping leg held on the holding element in the open position can be released from the holding element when an electrical conductor to be clamped exerts an actuating force on the release section of the release element. This allows automatic release of the clamping leg from the holding element when the electrical conductor is inserted. The release section can be subjected to pressure by a separate tool, a component of the conductor connection terminal, such as an actuating element, or directly via the inserted electrical conductor itself, thereby causing the clamping leg to be released from the holding element.By means of the release element, the clamping leg, which is held in the open position on the retaining element, can be released from the retaining element by applying pressure to the release section in the direction of the conductor insertion of the electrical conductor to be connected. Depending on the design of the spring-loaded terminal connection, the release element can be designed as a separate component or as part of the clamping spring or the retaining element, e.g., as a release element formed integrally with the clamping spring or the retaining element.

[0014] According to an advantageous embodiment of the invention, the release element has a spring section behind the release section and / or behind the support section in the conductor guidance direction, via which spring section the release element is supported against the force applied by the electrical conductor to the release section on a rear housing wall of the insulating housing arranged behind the spring element in the conductor guidance direction. As a result, the release section is held by the spring section under a defined pretension, so that undesired release of the locking of the clamping leg on the holding element, e.g. due to vibrations, is avoided. The electrical conductor to be clamped must first be pressed against the release section with a certain minimum force in order to release the locking.

[0015] According to an advantageous embodiment of the invention, the clamping spring in the region of the release element, viewed in the conductor guidance direction, initially transitions in an arcuate manner behind the release section into a spring section of the spring element that runs essentially at right angles to the conductor guidance direction. In this way, the clamping spring can be formed from a relatively long material section from the release element to the support point on the rear housing wall, so that the spring element can be designed with an advantageous, relatively low spring force without particularly complex modifications to the relatively stiff sheet metal material of the clamping spring being required. In order to achieve the desired, relatively low spring effect, the clamping spring can be realized with a smaller cross-sectional area in the region of the arcuate section as well as in the region of the spring section, which, for example,by punching out a central material section or by punching out lateral material sections from the sheet metal material of the clamping spring. The arcuate section can, for example, extend essentially over an angle of 180°.

[0016] According to an advantageous embodiment of the invention, a support surface is formed at the free end of the spring section to support the spring element against the rear housing wall. Such a support surface allows for a defined contact and support against the rear housing wall.

[0017] According to an advantageous embodiment of the invention, the clamping spring has a support section connected to the clamping leg via a spring arch, wherein the support section is designed to support the clamping spring on the busbar, in particular on a frame part of the busbar. The support section allows for secure support of the clamping spring and sufficient support against the spring force exerted by the clamping leg.

[0018] According to an advantageous embodiment of the invention, the retaining element is formed integrally with the support section. In this way, the retaining element can be formed as an extension of the support section and extend into an area behind the clamping point, as seen in the conductor insertion direction.

[0019] According to an advantageous embodiment of the invention, the holding element has a main body, wherein the holding tab protrudes from the main body at a point that is closer to the support point of the support section on the busbar than to the release section of the release element. In this way, the distance occurring in the conductor insertion direction between the support point of the holding tab on the main body and the support point of the support section can be minimized, so that the moment generated when the clamping leg is locked onto the holding tab is minimized. This, in turn, makes it possible to minimize the force acting on the housing base of the insulating housing from the support section of the clamping spring in the open position, in particular to a value range in which the material of the insulating housing is not damaged.

[0020] In an advantageous embodiment, the support section can be arranged, for example, behind the release section in the conductor insertion direction. This maximizes the lever arm formed behind the retaining element up to the support section, which also minimizes the forces acting on the housing base of the insulating housing.

[0021] According to an advantageous embodiment of the invention, the main body of the retaining element is connected to the support section via at least one connecting section that is curved in an arcuate manner when viewed from the side of the clamping spring. Such a connecting section can create a relatively short transition, particularly in the conductor insertion direction, between the support point of the clamping spring on the busbar and the retaining element. The curved connecting section can, for example, be curved in an S-shape.

[0022] According to an advantageous embodiment of the invention, the arcuate connecting section extends substantially perpendicular to the conductor insertion direction over at least part of its longitudinal extent. This also allows the distance between the support section and the retaining element to be minimized.

[0023] According to an advantageous embodiment of the invention, the clamping leg has a first locking element and the at least one retaining tab has a second locking element which can be locked to the first locking element in the open position. This enables secure locking between the clamping leg and the retaining element or the retaining tab. The first locking element can be designed, for example, without any special modifications to the clamping spring, for example by using the free end, e.g. a clamping edge of the clamping leg, as the first locking element. Alternatively, at least one locking tab can be provided on the clamping leg, on which a first locking element for locking to the retaining tab is located.

[0024] According to an advantageous embodiment of the invention, at least one locking tab is provided on the clamping leg, on which a first locking element is located for locking with the retaining tab. This allows further freedom in the design of the spring-loaded terminal connection and the automatic release functionality. The locking tab can be arranged, for example, on the side of the clamping leg. It is advantageous to arrange a locking tab symmetrically on the left and right of the clamping leg, each of which has a first locking element.

[0025] According to an advantageous embodiment of the invention, the at least one locking tab protrudes beyond the clamping edge of the clamping leg in the conductor insertion direction. This allows for a reliable coupling between the first and second locking elements in the open position without impairing the clamping function of the clamping leg.

[0026] According to an advantageous embodiment of the invention, the busbar has a frame part in which the clamping spring is suspended or clamped, wherein the frame part has a through-opening through which the electrical conductor to be connected can be inserted. For example, the clamping spring can be suspended with its support section on an edge section of the frame part surrounding the through-opening. The clamping spring can be suspended or clamped in the frame part in such a way that the support section is fastened to the frame part and the clamping leg is aligned towards the contact section of the busbar, i.e. in the clamped position without an inserted electrical conductor it rests against the contact section or, with an inserted electrical conductor, the clamping leg presses the electrical conductor against the contact section.

[0027] The frame part can be formed in one piece from the material of the busbar, e.g. as a region bent and punched out from the contact section. The frame part can have a circumferential frame that completely surrounds the through-opening. For example, the through-opening can have a substantially rectangular cross-section. The frame part can then have a first side leg protruding from the contact section on one side and a second side leg protruding on the opposite side, wherein the first and second side legs can extend parallel to one another. The frame part can further have a cross leg that connects the free ends of the first and second side legs to one another. The clamping spring can then be suspended from the cross leg by means of the support section.

[0028] According to an advantageous embodiment of the invention, the retaining element protrudes into the through-opening of the frame part. This allows for a compact design of the spring-loaded terminal connection and a good integration of the snap-in functionality.

[0029] According to an advantageous embodiment of the invention, a U-shaped recess is formed on the support section at the transition to the retaining element, which recess is designed to secure the support section to the frame part of the busbar. This allows for a reliable and easy-to-install attachment of the clamping spring to the frame part.

[0030] According to an advantageous embodiment of the invention, the retaining element is arranged behind the terminal point or behind the majority of the busbar in the conductor insertion direction of the electrical conductor into the spring-loaded terminal connection. In this way, the retaining element does not impede the insertion of the electrical conductor. For example, in the open position, i.e., when the clamping leg is locked to the retaining element, the retaining element may not protrude into a conductor receiving space, or may protrude only slightly relative to the clamping leg, when viewed in the conductor insertion direction.

[0031] According to an advantageous embodiment of the invention, the spring-loaded terminal connection has a pivoting operating lever that can be manually operated by the user to actuate the clamping spring into the open position. This allows for simple and convenient manual operation of the spring-loaded terminal connection. Furthermore, such an operating lever can be easily integrated into the design of a conductor terminal.

[0032] According to an advantageous embodiment of the invention, the actuating lever is U-shaped as viewed in the conductor insertion direction, with an electrical conductor being able to be inserted through an interior space of the U-shape. This allows for a particularly compact design of the spring-loaded terminal connection such that large forces can be transmitted with the actuating lever, yet requires only a negligible amount of additional space. This is achieved in particular by using the interior space of the U-shape to accommodate the electrical conductor to be connected.

[0033] For example, the operating lever can have a manual operating area, e.g. in the form of a lever handle, from which the operating lever extends around the arrangement of clamping spring and busbar via two side cheeks that protrude, e.g. parallel, from the manual operating area. If the spring-loaded terminal connection is arranged in an insulating housing of a conductor connection terminal, the side cheeks can be located inside the insulating housing. A spring driver can be arranged on each of the side cheeks on an inner side, i.e. on the side facing the clamping spring, which spring driver can be formed integrally on the respective side cheek, for example. By means of such a spring driver, the clamping spring can be actuated and correspondingly pivoted into the open position either directly on the clamping leg or on respective operating sections assigned to the spring drivers, which protrude laterally beyond the clamping leg.

[0034] According to an advantageous embodiment of the invention, the actuating lever has at least one spring driver arranged laterally of the clamping spring and configured to deflect the clamping leg. At least one such spring driver allows the clamping leg to be reliably deflected into the open position upon appropriate pivoting of the actuating lever. The actuating lever or the spring driver can be mounted, for example, on the contact section of the busbar.

[0035] According to an advantageous embodiment of the invention, the spring driver has a pin with a circular or partially circular circumference and a V-shaped cutout, with the clamping leg extending into the V-shaped cutout with an actuating portion. This enables reliable force transmission from the actuating lever to the clamping spring.

[0036] According to an advantageous embodiment of the invention, the clamping spring has a support section connected to the clamping leg via a spring arch, wherein the support section is designed to support the clamping spring on the busbar, in particular on the frame part. The support section allows for secure support of the clamping spring and sufficient support against the spring force exerted by the clamping leg.

[0037] According to an advantageous embodiment of the invention, a conductor guide channel for guiding the electrical conductor to be clamped to the contact section can be formed in the insulating material housing, wherein the release section of the release element is arranged in the conductor guide channel or at least projects into the conductor guide channel.

[0038] According to an advantageous embodiment of the invention, the release section of the release element can be arranged behind the contact section or at least behind the clamping point in the conductor insertion direction (L).

[0039] 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 is to be interpreted as "at least one component." Angles expressed in degrees refer to a circle of 360 degrees (360°).

[0040] The invention is explained in more detail below using exemplary embodiments and drawings.

[0041] It shows Fig. 1 a conductor connection terminal in perspective view, Fig. 2 a side sectional view of the conductor connection terminal according to Fig. 1 in the unactuated state, Fig. 3 the conductor connection terminal according to Fig. 2 in the actuated state of the operating lever, Fig. 4 the conductor connection terminal according to Fig. 2 in the unactuated state with the electrical conductor plugged in, Fig. 5 a combined holding-release element in perspective view, Fig. 6 an operating lever in perspective view, Fig. 7 the operating lever according to Fig. 6 in lateral sectional view.

[0042] The Fig. 1 shows a conductor terminal 1 with an insulating housing 2. In the illustrated embodiment, the conductor terminal 1 is designed as a two-pole conductor terminal. Accordingly, the conductor terminal 1 has two conductor insertion openings 20 in the insulating housing 2, through each of which an electrical conductor to be connected can be inserted. Two spring-loaded terminal connections are arranged in the insulating housing 2, with each spring-loaded terminal connection being assigned to a conductor insertion opening 20. The conductor terminal 1 has a pivotable actuating lever 6 for actuating the clamping spring of each spring-loaded terminal connection.

[0043] The Fig. 2 shows a side sectional view of the conductor connection terminal 1 according to Fig. 1. It can be seen that the spring-loaded terminal connection arranged in the insulating housing 2 comprises a clamping spring 4 and a busbar 3. The busbar 3 has a contact section 31 and a frame part 32 bent at an angle from the contact section 31. The contact section 31 serves to electrically contact a connected electrical conductor. The clamping spring 4 has a support section 41 that is attached to the frame part 32. The support section 41 can, in particular, be suspended from a transverse leg 33 of the frame part 32 that is arranged remote from the contact section 31. The clamping spring 4 has a spring arch 42 adjoining the support section 41 and a clamping leg 43 adjoining the spring arch 42, which serves to clamp an electrical conductor to the contact section 31, specifically at a clamping point 30. The clamping leg 43 terminates at the free end with a clamping edge 46.

[0044] To actuate the clamping spring 4, ie to deflect the clamping leg 43 from the Fig. 2 into an open position, the actuating lever 6 is provided. The actuating lever 6 has a manual actuating area 60 that protrudes from the insulating housing 2. At the manual actuating area 60, the actuating lever 6 can be gripped and pivoted by the user. The actuating lever 6 extends into the insulating housing 2 via side cheeks 65. A spring actuating section 61 with a spring driver 62 is arranged on each of the side cheeks 65. When the actuating lever 6 is pivoted, the clamping leg 43 is pivoted in a direction away from the contact section 31 via the spring driver 62 and transferred into the open position, as can be seen in Fig. 3. If the actuating element 5 is positioned opposite the Fig. 2, the clamping leg 43 is deflected upward by the spring drivers 62, so that the clamping edge 46 is lifted from the contact section 31 and moved away. In this way, the clamping point can be opened so that a clamped electrical conductor can be removed or an electrical conductor to be clamped can be easily inserted. In this open position, the clamping leg 43 can be locked to a holding element 5.

[0045] As can be seen, a holding element 5 is arranged in the insulating housing 2, which serves to hold the clamping leg 43 in the open position. The holding element 5 has a locking element 50, to which the clamping leg 43 can be locked with a locking element, which in this case is formed by the clamping edge 46. However, it is also possible for a separate locking element to be formed on the clamping leg 43.

[0046] It can be seen in particular that at the end of the support section 41 in the conductor insertion direction L behind the transverse leg 33, an S-shaped curved connecting section 51 is arranged, which is formed integrally with the support section 41. The connecting section 51 merges into a main body 54 of the holding element 5. A holding tab 52 projects from the main body 54 opposite to the conductor insertion direction L, i.e. in the direction of the clamping leg 43. At the free end of the holding tab 52, a locking element 50 is formed. The clamping leg 43 can be locked with its locking element, i.e. in this case with the clamping edge 46, to the locking element 50 in the open position, as the Fig. 3 illustrates this.

[0047] In the Fig. 3, the actuating lever 6 is pivoted into the open position. Via the spring driver 62, the clamping leg 43 is now moved into the open position, in which the clamping leg 43 can engage with the clamping edge 46 behind the locking element 50. If the actuating lever 6 is now moved back into the closed position, as in Fig. 2 and Fig. 4, the clamping leg 43 remains in the open position since it is held by the holding element 5.

[0048] Adjoining the holding element 5 in the conductor insertion direction L is a release element 8, which is also formed integrally with the clamping spring 4 or the holding element 5. The release element 8 has a release section 80 extending substantially orthogonally to the conductor insertion direction L, which serves to actuate the release element 8 by the electrical conductor when it is inserted into the conductor connection terminal 1 (cf. Fig. 4).

[0049] Behind the release section 80, the release element 8 merges into a support section 82, which is U-shaped in side view and serves to support the holding element 5 on the housing base 22 of the insulating housing 2. Adjoining the support section 82 is a spring element 81, which extends essentially orthogonally to the conductor insertion direction L and ends with a support surface 83. The spring element 81 is supported on the rear housing wall 22 of the insulating housing 2 via the support surface 83.

[0050] The Fig. 4 shows how an electrical conductor 9 is inserted into the conductor connection terminal 1 and pressed with its free end against the release section 80. As a result, the release element 8 springs in slightly and thereby deflects the holding element 5 such that the second locking element 50 is displaced slightly rearward in the conductor insertion direction L, so that the clamping leg 43 can be released therefrom with its clamping edge 46. As a result, the clamping leg 43 springs back and presses the electrical conductor 9 against the contact section 31. The clamping leg 43 thus moves into the clamping position due to the spring preload of the clamping spring 4.

[0051] The Fig. 5 shows the clamping spring 4 with the elements already explained, in particular the holding element 5 formed integrally on the support section 41 and the release element 8 formed integrally on the holding element 5. It can be seen that the connecting section 51 can be formed by two relatively narrow lateral connecting arms, i.e. the material lying between them from the sheet metal material of the clamping spring 4 has been removed. Similarly, the central sheet metal material between the main body 54 and the release section 80 can be removed, so that the release section 80 is only connected to the main body 54 via lateral arms. In a comparable way, the release element 8 can be formed behind the release section 80, in that the spring element 81 and the curved transition of the support section 82 are formed only by lateral arms, between which the sheet metal material of the clamping spring 4 is removed.The lateral arms can be connected to each other at the free end via the support surface 83, which thus forms a kind of cross connection between the two arms of the spring element 81.

[0052] The Fig. 6 and Fig. 7 show an operating lever 6 with further details. It can be seen that the operating lever 6 has side cheeks 65 projecting substantially at right angles from the manual operating area 60 on opposite sides. The side cheeks 65 extend longitudinally beyond the manual operating area 60. In this area, the side cheeks 65 are not connected to one another, i.e., a free space 66 is present there.

[0053] A locking element 67 can be arranged on the manual actuation area 60, which serves to lock the actuation lever 6 in the closed lever position. With the locking element 67, the actuation lever can be locked, for example, to a corresponding locking section of the insulating housing 2. Furthermore, the actuation lever 6 can have a manual actuation aid 69 on the end facing the conductor insertion side, which serves to make it easier to grip the actuation lever in the closed position or to actuate it with a tool.

[0054] A bearing section 68 is formed on each of the side cheeks 65 on the mutually facing inner sides, which extends into the interior of the insulating housing 2. The spring actuating sections 61 with the spring drivers 62 are arranged on the bearing sections 68 on the mutually facing inner sides. The spring drivers 62 are designed in a partially circular manner with a V-shaped cutout 63 on the circumference. It can also be seen that the spring actuating sections 61 with the spring drivers 62 do not directly adjoin the respectively assigned side cheeks 65 in the transverse direction, but rather a gap-like intermediate space 64 is formed between them. An inner wall of the insulating housing 2, for example, can be received in the gap-like intermediate space 64, which contributes to improving the guidance of the actuating lever 6 during a pivoting movement. The actuating lever 6 can be pivoted about a rotation axis D. List of reference symbols 1 conductor connection terminal 2 insulating housings 3 busbar 4 clamping spring 5 Holding element 6 operating levers 8 Release element 9 electrical conductor 20 conductor entry opening 21 rear housing wall 22 Case back 30 terminal point 31 Contact section 32 frame part 33 cross legs 41 support section 42 spring bows 43 clamping legs 46 clamping edge 50 second locking element 51 connecting section 52 retaining tab 54 main bodies 60 manual operating range 61 Spring actuation section 62 spring drivers 63 V-shaped neckline 64 gap-like space 65 sidewall 66 open space 67 Locking element 68 storage section 69 manual operating aid 80 release section 81 spring element 82 support section 83 support area 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 10 2020 119 372 A1

[0002]

Claims

[1] Conductor connection terminal (1) with an insulating housing (2) which has at least one conductor insertion opening (20) for receiving an electrical conductor (9) in a conductor insertion direction (L), wherein at least one spring-loaded clamping connection is arranged in the insulating housing (2), which is designed to connect an electrical conductor (9) by means of spring force, wherein the spring-loaded clamping connection has at least one busbar (3) and a clamping spring (4) which has a clamping leg (43) with a clamping edge (46) for clamping an electrical conductor (9) at a clamping point (30) on a contact section (31) of the busbar (3), and with a holding element (5) which is designed to hold the clamping leg (43) in an open position, characterized by that the clamping spring (4) has a support section (82), wherein the holding element (5) is supported via the support section (82) on a housing base (22) of the insulating housing (2). [2] Conductor connection terminal according to claim 1, characterized by that at least one retaining tab (52) is formed on the retaining element (5), which extends towards its free end opposite to the conductor insertion direction in the direction of the free end of the clamping leg (43), so that the clamping leg (43) can be fixed to the retaining tab (52) in the open position. [3] Conductor terminal according to one of the preceding claims, characterized by that the spring-loaded clamp connection has a release element (8) with a release section (80), by the actuation of which the holding element (5) can be deflected to such an extent that the clamping leg (43) held on the holding element (5) is released from the holding element (5). [4] Conductor connection terminal according to claim 3, characterized bythat the clamping leg (43) held on the holding element (5) in the open position can be released from the holding element (5) when an electrical conductor (9) to be clamped exerts an actuating force on the release section (80) of the release element (8). [5] Conductor connection terminal according to one of claims 3 to 4, characterized by that the release element (8) is formed integrally with the holding element (5). [6] Conductor connection terminal according to one of claims 3 to 5, characterized by in that the release element (8) has a spring section behind the release section (80) and / or behind the support section (82) in the conductor guide direction, via which spring section the release element (8) is supported against the force applied by the electrical conductor (9) to the release section (80) on a rear housing wall (21) of the insulating housing (2) arranged behind the spring element (81) in the conductor guide direction. [7] Conductor connection terminal according to claim 6, characterized bythat the clamping spring (4) in the region of the release element (8), viewed in the conductor guidance direction, initially transitions in an arc-shaped manner behind the release section (80) into a spring section of the spring element (81) which runs essentially at right angles to the conductor guidance direction. [8] Conductor connection terminal according to claim 7, characterized by that a support surface (83) for supporting the spring element (81) on the rear housing wall (21) is formed at the free end of the spring section. [9] Conductor terminal according to one of the preceding claims, characterized by in that the clamping spring (4) has a support section (41) which is connected to the clamping leg (43) via a spring arch (42), wherein the support section (41) is designed to support the clamping spring (4) on the busbar (3), in particular on a frame part (32) of the busbar (3). [10] Conductor connection terminal according to claim 9, characterized bythat the holding element (5) is formed integrally with the support section (41). [11] Conductor terminal according to one of claims 9 to 10, characterized by that the holding element (5) has a main body (54), wherein the holding tab (52) protrudes from the main body (54) at a point which is arranged closer to the support point of the support section (41) on the busbar (3) than to the release section (80) of the release element (8). [12] Conductor connection terminal according to claim 11, characterized by that the main body (54) of the holding element (5) is connected to the support section (41) via at least one connecting section (51) which is curved in an arcuate manner when viewed from the side towards the clamping spring (4). [13] Conductor terminal according to claim 12, characterized by that the arcuate connecting section (51) extends over at least part of its longitudinal extent substantially at right angles to the conductor insertion direction. [14] Conductor terminal according to one of the preceding claims, characterized by that the clamping leg (43) has a first locking element and the at least one retaining tab (52) has a second locking element (50) which can be locked to the first locking element in the open position. [15] Conductor terminal according to one of the preceding claims, characterized by that the busbar (3) has a frame part (32) in which the clamping spring (4) is suspended or clamped, wherein the frame part (32) has a through-opening through which the electrical conductor (9) to be connected can be inserted. [16] Conductor connection terminal according to claim 15, characterized by that the holding element (5) projects into the through opening of the frame part (32). [17] Conductor terminal according to one of the preceding claims, characterized bythat the holding element (5) is arranged in the conductor insertion direction (L) of the electrical conductor (9) into the spring-loaded terminal connection behind the clamping point (30) or behind the predominant part of the busbar (3). [18] Conductor terminal according to one of the preceding claims, characterized by that the spring-loaded clamp connection has a pivotable actuating lever (6) that can be manually actuated by the user for actuating the clamping spring (4) into the open position. [19] Conductor terminal according to claim 18, characterized by that the actuating lever (6) is U-shaped when viewed in the conductor insertion direction, wherein an electrical conductor (9) can be inserted through an interior space of the U-shape. [20] Conductor terminal according to one of claims 18 to 19, characterized bythat the actuating lever (6) has at least one spring driver (62) which is arranged laterally of the clamping spring (4) and is designed to deflect the clamping leg (43). [21] Conductor terminal according to claim 20, characterized by that the spring driver (62) has a pin which is circular or partially circular in circumference and has a V-shaped cutout (63), wherein the clamping leg (43) projects into the V-shaped cutout (63) with an actuating section.

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