Spring clamp connection and conductor connection terminal

Abstract

Spring-loaded clamping connection for connecting at least one electrical conductor by means of spring force, comprising at least one busbar (3) and a clamping spring (4), wherein the busbar (3) has a contact section (31) for clamping the electrical conductor and the clamping spring (4) has a clamping leg (43) with a clamping edge (46) for pressing the electrical conductor against the contact section (31), wherein the clamping spring (4) has a spring arc (42) adjoining the clamping leg (43) and a contact section (41) adjoining the spring arc (42) by which the clamping spring (4) is attached to the busbar (3), wherein the spring-loaded clamping connection has a retaining element (5) for holding the clamping leg (43) in the open position, wherein the spring-loaded clamping connection has a release element (8) with a release section (80),by the clamping leg (43) held on the retaining element (5) being detachable from the retaining element (5) when the release section (80) is acted upon with a release force, characterized in that the retaining element (5) has at least one loop-shaped locking element (51) on which the clamping leg (43) can be locked in the open position, wherein the release element (8) has at least one driver (82) which is adapted with respect to its outer contour to an inner contour (52) of the at least one loop-shaped locking element (51) and is positively engaged in the inner contour (52) of the at least one loop-shaped locking element (51).

Description

[0001] The invention relates to a spring-loaded clamping connection for connecting at least one electrical conductor by means of spring force, comprising at least one busbar and a clamping spring, wherein the busbar has a contact section for clamping the electrical conductor and the clamping spring has a clamping leg with a clamping edge for pressing the electrical conductor against the contact section, wherein the clamping spring has a spring arc adjoining the clamping leg and a contact section adjoining the spring arc by which the clamping spring is attached to the busbar, wherein the spring-loaded clamping connection has a retaining element for holding the clamping leg in the open position, wherein the spring-loaded clamping connection has a release element with a release section by which, when the release section is acted upon with a release force, the clamping leg held on the retaining element can be released from the retaining element.The invention also includes a conductor terminal block with such a spring-loaded clamping connection.

[0002] A spring-loaded clamp connection and a conductor connection terminal are known, for example, from WO 2014 / 124962 A1.

[0003] The invention is based on the objective of providing an improved spring-clamp connection and a conductor connection terminal.

[0004] This problem is solved in a spring-clamp connection of the type described above by the fact that the holding element has at least one loop-shaped locking element against which the clamping leg can be locked in the open position, and the release element has at least one driver whose outer contour is adapted to an inner contour of the at least one loop-shaped locking element and which is positively engaged in the inner contour of the at least one loop-shaped locking element. In this way, the spring-clamp connection can be implemented with a safe and reliable automatic connection function. The positive-locking coupling of the release element with the at least one loop-shaped locking element allows for particularly good transmission of the release force from the release section to the locking mechanism between the clamping leg and the holding element.In particular, this makes it possible for sufficient actuating force to be transferred to the release section when inserting electrical conductors with a small cross-section or, more generally, with low bending stiffness; i.e., even less rigid or smaller conductors can cause the locking of the clamping leg from the holding element to be automatically released by inserting them into the spring-loaded clamping connection.

[0005] The clamping arm can be moved from a clamping position to an open position, for example, by applying pressure with an actuating element. In the open position, the clamping edge of the clamping arm is moved away from the contact section relative to the clamping position. The invention allows the clamping point to remain open for extended periods, even without the need for manual actuating. The invention enables force-free conductor connection and automatic release of the electrical conductor clamping by the clamping arm. The clamping spring can be designed relatively simply, since the release element is implemented as a separate component with a special release contour (release section), for example, in the form of a plastic part.

[0006] As mentioned, the outer contour of at least one drive element is adapted to the inner contour of at least one loop-shaped locking element. For example, the outer contour of the drive element can correspond exactly to the inner contour of the at least one loop-shaped locking element, at least over the majority of its circumference.

[0007] The at least one loop-shaped locking element can, for example, be loop-shaped in such a way that it surrounds an inner area like a loop-shaped arm, e.g., in a pocket-like manner, so that the driver attached to the inner contour cannot unintentionally slip out. For example, the loop-shaped locking element can encircle the interior over a wrap angle of more than 180 degrees. The at least one loop-shaped locking element then acts like a clamp that grips the driver.

[0008] The clamping leg can, for example, be directly engaged with its clamping edge on at least one loop-shaped locking element. The clamping leg can also have a separate locking section, distinct from the clamping edge, which can be engaged with a locking contour of the locking element.

[0009] The spring-loaded clamping connection can be designed, for example, so that the electrical conductor to be clamped is to be inserted into the spring-loaded clamping connection in a specific conductor insertion direction, e.g. a conductor insertion direction that runs essentially parallel to the longitudinal extent of the contact section of the busbar.

[0010] According to an advantageous embodiment of the invention, the at least one loop-shaped locking element has a locking contour on which the clamping leg can be locked, wherein the locking contour is arranged in the conductor insertion direction behind the point where the contact section of the clamping spring is supported on the busbar.

[0011] According to an advantageous embodiment of the invention, the release element has a main body with two connecting arms projecting from the main body, each connecting arm having a drive lug formed on it which is positively engaged in the inner contour of at least one loop-shaped locking element or of another loop-shaped locking element. This allows for a particularly secure and reliable attachment of the release element to a loop-shaped locking element or, for example, to two loop-shaped locking elements. For example, one drive lug can be engaged on each loop-shaped locking element. The drive lugs can be arranged on the inner surfaces of the connecting arms facing each other, so that the drive lugs point towards each other. It is also possible for the drive lugs to be arranged on the opposite sides of the connecting arms, so that the drive lugs point away from each other.

[0012] According to an advantageous embodiment of the invention, the release section projects from the main body in a different direction than the connecting arms. Advantageously, the release section can, for example, project from the main body essentially orthogonally to the conductor insertion direction of an electrical conductor into the spring-clamp connection and extend into a conductor receiving space. The connecting arms can, for example, project from the main body in the opposite direction to the conductor insertion direction. The release element can, for example, be pedal-shaped.

[0013] For example, the release section and two spaced-apart side walls can project from the main body. Each side wall can be connected to a connecting arm that projects from the side wall. The side walls can be arranged parallel to each other, with the release section extending transversely to the side walls. The release section can connect the side walls to each other.

[0014] According to an advantageous embodiment of the invention, a pocket-shaped receptacle for receiving the end of the inserted electrical conductor is formed on the main body. This has the advantage that at least the free end of the electrical conductor can be securely received by the release element and cannot slip laterally. In this way, it can be ensured in particular that even smaller, less rigid electrical conductors are reliably guided to the release section.

[0015] According to an advantageous embodiment of the invention, a conductor receiving ramp is formed on the main body for guiding the electrical conductor. This ramp runs at an acute angle to the conductor insertion direction, in which the electrical conductor to be clamped is to be inserted into the spring-clamp terminal. In this way, the electrical conductor can also be guided precisely to the release section. In particular, this prevents the electrical conductor from being deflected or bent in an undesired direction at certain points within the spring-clamp terminal. For the formation of the conductor receiving ramp on the main body, the main body can advantageously be oriented at an angle to the conductor insertion direction.

[0016] According to an advantageous embodiment of the invention, the release element is designed as a separate component, in particular as a plastic component. This allows for a high degree of freedom in the design of the release element, so that its shape can be optimally adapted to its function. By designing the release element as a plastic component, it can be easily and cost-effectively produced in a desired, even complex, shape. In particular, the release element can be conveniently shaped for easy mounting on the retaining element.

[0017] According to an advantageous embodiment of the invention, the retaining element has two spaced-apart loop-shaped locking elements with a gap between them. The retaining element can, for example, be fork-shaped with the loop-shaped locking elements. The loop-shaped locking elements can be shaped like curved locking arms. The locking arms can, for example, have a locking section at their free end against which the clamping leg can be engaged.

[0018] According to an advantageous embodiment of the invention, a projection extends from the main body of the release element, projecting into the space between the spaced-apart loop-shaped locking elements. This allows for secure mounting of the release element to the retaining element. Unwanted displacement of the release element from the retaining element can be avoided. In this way, good force transmission from the release element to the retaining element for releasing the locking of the clamping leg can be ensured.

[0019] The extension can also be an extension of the conductor ramp in the opposite direction to the conductor insertion. The extension can project to below the clamping edge of the clamping leg. This ensures that an inserted electrical conductor cannot strike an edge at the beginning of the main body and prematurely trigger the release element.

[0020] According to an advantageous embodiment of the invention, the inner contour of the at least one loop-shaped locking element has a contour that deviates from a circular shape. This has the advantage that a torque can be efficiently transmitted to the loop-shaped locking element via the driver of the release element, which, as mentioned, is adapted to the inner contour of the locking element with respect to its outer contour. For example, by deflecting the release element in the form of a pivoting movement, the retaining element or at least the at least one loop-shaped locking element can also be deflected in the pivoting movement.

[0021] According to an advantageous embodiment of the invention, at least one actuating section is formed on the clamping leg, at which the clamping leg can be moved from a clamping position to an open position by means of an actuating element, in which the clamping edge of the clamping leg is moved away from the contact section relative to the clamping position. In this way, a defined part of the clamping spring or clamping leg is made available for manual actuation. It is also conceivable, in principle, that the clamping leg is formed without an actuating section. In this case, manual actuation can be effected by directly applying pressure to the clamping leg.

[0022] At least one actuation section can be formed as a flared or bent tab on the clamping leg. For example, an actuation section can be formed on opposite sides of the clamping leg. This allows for symmetrical actuation of the clamping leg, thus preventing misalignment.

[0023] According to an advantageous embodiment of the invention, the spring-loaded clamping connection has a manual actuating element for moving the clamping arm into the open position. This manual actuating element has a handle section for manual operation. This has the advantage that the spring-loaded clamping connection has its own actuating element, which can be optimally designed for simple and reliable actuation of the clamping arm. Furthermore, an actuating element is always present, so the user does not need a separate tool.

[0024] According to an advantageous embodiment of the invention, the manual actuating element is designed to branch out from the handle section into two spaced-apart, essentially parallel actuating arms, each of which has a spring-loaded section for applying force to an actuating section of the clamping spring. Such a fork-shaped actuating element can be integrated advantageously and in a space-saving manner into a compact conductor terminal block. For example, the actuating element with its actuating arms can extend over parts of the spring-loaded clamping connection, e.g., the contact section or another part of the busbar and / or a part of the clamping spring.

[0025] According to an advantageous embodiment of the invention, the spring-clamp connection has a manually actuating element: a sliding actuating push button that is movable in one direction. This allows for simple and ergonomically advantageous actuation of the clamping arm by applying a pressure force to the manual actuating section of the actuating push button. The actuating push button can, for example, be displaceable in a linear direction. For this purpose, the actuating push button can be slidably mounted in an actuating shaft of an insulating housing of a conductor terminal in which the spring-clamp connection is arranged.

[0026] According to an advantageous embodiment of the invention, the actuating push button is positioned at an angle of 60° to 120°, particularly 80° to 100°, to the conductor insertion direction. This allows for a particularly efficient and direct force transmission from the actuating push button to the clamping arm. Forces are thus largely kept away from any insulating housing that may surround the spring-clamp connection, preventing unnecessary stress on the insulating housing material. The actuating push button's direction of movement can, for example, be essentially perpendicular to the conductor insertion direction.

[0027] According to an advantageous embodiment of the invention, the retaining element is formed integrally with the contact section. This allows for a particularly advantageous provision of a single unit consisting of the clamping spring and the retaining element.

[0028] According to an advantageous embodiment of the invention, the busbar has a frame part in which the clamping spring is hooked or clamped, the frame part having a through-opening through which the electrical conductor to be connected can be inserted. For example, the clamping spring can be hooked with its contact section onto an edge section of the frame part that surrounds the through-opening. The clamping spring can be clamped in the frame part such that the contact section is attached to the frame part and the clamping leg is oriented towards the contact section of the busbar, i.e., in the clamping 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.

[0029] The frame component can be formed in one piece from the busbar material, for example, as a section bent and punched out from the contact section. The frame component 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 component can then have a first leg projecting from the contact section on one side and a second leg projecting from the opposite side, with the first and second legs extending parallel to each other. The frame component can also have a transverse leg connecting the free ends of the first and second legs. The clamping spring can then be hooked onto the transverse leg via the support section.

[0030] The aforementioned problem is also solved by a conductor terminal block with an insulating housing and a spring-loaded clamping connection of the type described above, which is arranged at least predominantly within the insulating housing. The insulating housing has a conductor entry opening through which an electrical conductor can be guided in the conductor entry direction to a clamping point between the contact section and the clamping edge. The advantages described above can also be realized in this way.

[0031] According to an advantageous embodiment of the invention, the spring-loaded clamp connection has a manual release element that can be manually operated on the outside of the insulating housing to release the clamping leg held by the retaining element from the retaining element. In this way, the locking of the clamping leg from the retaining element can also be manually released, e.g., as an emergency release function if the release of the locking mechanism by the inserted electrical conductor fails, e.g., due to insufficient bending stiffness.

[0032] For the purposes of the present invention, the indefinite term "a" is not to be understood as a numeral. Therefore, when, for example, a component is mentioned, this is to be interpreted as "at least one component". Where angles are specified in degrees, these refer to a circle of 360 degrees (360°).

[0033] The invention is explained in more detail below with reference to exemplary embodiments and drawings. They show Fig. 1 a conductor terminal in the clamping position in perspective view, Fig. 2 the conductor connection terminal according to Fig. 1 with electrical conductor plugged in, Fig. 3 the conductor connection terminal according to Fig. 1 in side sectional view in the open position, Fig. 4 a release element in top view, Fig. 5 the solvent element according to Fig. 4 in perspective view, Fig. 6 a clamping spring with a retaining element in side view, Fig. 7 the clamping spring with the retaining element according to Fig. 6 in perspective view, Fig. 8 the clamping spring according to the Fig. 6, Fig. 7 with a power rail in perspective view.

[0034] The Fig. Figure 1 shows a conductor terminal 1, which has an insulating housing 2. The conductor terminal 1 has a spring-loaded clamping connection in the insulating housing 2, which has a busbar 3 and a clamping spring 4. The clamping spring 4 has a contact section 41, by which the clamping spring 4 is supported on the busbar 3. From the contact section 41, the clamping spring 4 extends via a spring arc 42 to a clamping leg 43, which is designed to clamp an electrical conductor to a contact section 31 of the busbar. Fig. Figure 1 shows the conductor terminal 1 in an exemplary embodiment as a printed circuit board terminal, in which a connecting pin 30 protrudes from the insulating housing 2. The conductor terminal 1 can be soldered to a printed circuit board using the connecting pin 30. The connecting pin 30 can be integrally formed with the busbar 3.

[0035] The Fig. Figure 2 shows the conductor terminal 1 with an electrical conductor 9 inserted through a conductor entry opening 20 of the insulating housing 2. The conductor 9 is clamped by the clamping leg 43 at the contact section 31 with a stripped section, or at least can be clamped there after the clamping leg 43 is released from its locked position. The electrical conductor 9 is to be inserted into the spring-loaded terminal or into the insulating housing 2 in a conductor entry direction L.

[0036] The conductor terminal 1 also has a manual actuating element 6, which has a handle section 60 accessible on the outside of the insulating housing 2 for manual actuation. The actuating element 6 extends from the handle section 60 into the insulating housing 2, branching out from the handle section 60 into two spaced-apart actuating arms 61, between which a space is formed through which the electrical conductor 9 can pass. Each actuating arm 61 has a spring-loaded section at its free end, which can apply force to a respective actuating section 44 of the clamping spring 4 in order to deflect the clamping leg 43 from the clamped position shown to the open position.For this purpose, a pressure force must be applied to the handle section 60, which is transmitted via the actuating arms 61 to the actuating sections 44.

[0037] In the conductor entry direction L, behind the support point of the system section 41 on the busbar 3, there is a box-shaped release element 8, which is designed as a separate component. The release element 8 serves to release the locking mechanism of the clamping leg 43 in the open position, as will be explained in more detail below. As an optional feature, the release element 8 has a manual release control element 81, which protrudes from the insulating housing 2 or can at least be manually operated from the outside of the insulating housing 2. By actuating the release control element 81, the release element 8 can also be actuated in such a way that the clamping leg 43 is released from its locked open position.

[0038] In the sectional view of the Fig. Figure 3 shows the individual elements of the conductor terminal 1 with further details. A retaining element 5 is integrally formed on the clamping spring 4, in particular as an extension of the mounting section 41. The retaining element 5 has at least one loop-shaped locking element 51, e.g., in the form of an arcuately curved locking arm, which terminates at its free end with a locking contour 50. The clamping leg 43 can be locked in the open position either by its clamping edge 46 located at its free end or by a separate locking function element on the locking contour 50, as shown in the Fig. 3 illustrates this.

[0039] The at least one loop-shaped locking element 51 encloses an interior space with its loop-shaped or arc-shaped contour. A driver 82 of the release element 8 is received in this interior space. The driver's outer contour is adapted to the inner contour of the at least one loop-shaped locking element 51, and the driver is positively engaged and held within it. The release element 8 also has a release section 80 in the area where the electrical conductor 9 is inserted. This release section can be subjected to a compressive force by the inserted electrical conductor 9 to release the release element 8 from the Fig. to deflect the unactuated position shown in Figure 3. In particular, the release section 80 can be shifted slightly backwards and / or pivoted by the electrical conductor 9 in the conductor insertion direction L. During this deflection of the release element 8, the retaining element 5 or at least one of its loop-shaped locking elements 51 above the driver 82 is deflected in the same way, which causes the locking contour 50 to be shifted backwards in the conductor insertion direction L, allowing the clamping leg 43 to detach from the locking contour 50 and spring out towards the contact section 31 due to its spring preload.

[0040] A conductor receiving slope 86 for guiding the electrical conductor 9 can be formed on a main body 83 of the release element 8, which runs at an acute angle to the conductor insertion direction L.

[0041] The Fig. 4 and Fig. Figure 5 shows the release element 8 in various views with further details. The release element 8 can be box-shaped overall and thus enclose the free end of the inserted electrical conductor 9. The release element 8 has a main body 83 from which two connecting arms 84 project directly or via side walls 87. The connecting arms 84 are spaced apart from each other. A driver 82 is formed on each connecting arm 84. Between the connecting arms 84, a projection 85 extends from the main body 83 in a direction pointing away from the release section 80; its function will be discussed below.

[0042] For example, the release section 80 and two spaced-apart side walls 87 can project from the main body 83. Each side wall 87 can be connected to a connecting arm 84 that projects from the side wall 87. The side walls 87 can be arranged parallel to each other, with the release section 80 extending transversely to the side walls. The release section 80 can connect the side walls 87 to each other.

[0043] The Fig. 6 and Fig. Figure 7 shows an advantageous embodiment of the clamping spring 4 with the integrally formed retaining element 5. It can be seen that the actuating sections 44 on the clamping leg 43 can be designed such that the clamping leg 43 is wider in this area than in the area of ​​the clamping edge 46. These laterally projecting material sections each form lateral actuating sections 44.

[0044] Section 41 of the system has a tapered section 40 in which the width of section 41 is reduced. This tapered section 40 allows the clamping spring 4 to be hooked into a frame part of the busbar 3, as explained below.

[0045] In the conductor entry direction L, behind the tapered section 40, the retaining element 5 begins. The retaining element 5 forks into two spaced-apart, parallel, loop-shaped locking elements 51, which enclose a concave inner contour 52. The concave inner contour 52 and the outer contour of the drivers 82 are aligned so that a driver 82 can be positively engaged and held in an inner contour 52. A clearance 53 is formed between the locking elements 51, into which the extension 85 of the release element 8 projects. In this way, an additional positive-locking coupling and retention of the release element 8 on the retaining element 5 is achieved.

[0046] The extension 85 is further an extension of the conductor receiving slope 86 opposite to the conductor insertion direction L and projects to below the clamping edge 46 of the clamping leg 43 (compare Fig. 3) This ensures that an inserted electrical conductor 9 cannot come into contact with an edge at the beginning of the main body 83 and trigger the release element 8 prematurely.

[0047] The Fig.Figure 8 shows the clamping spring 4 attached to the busbar 3. It can be seen that the busbar 3 has a frame section formed by a section bent and punched out from the contact section 31. For example, side legs 33 of the frame section can project laterally from the transversely extending contact section 31, and these side legs are connected at their ends by a transversely extending cross leg 34 of the frame section. The contact section 31, the side legs 33, and the cross leg 34 completely enclose a through-opening 32 of the busbar 3. The mounting section 41 is supported on the cross leg 34 by its tapered section 40. The connecting pin 30 adjoins the cross leg 34 on the side facing away from the contact section 31. Reference symbol list 1 conductor connection terminal 2 insulating housings 3 Power rail 4 clamping springs 5 retaining element 6 Actuating element 8 Solvent element 9 electrical conductors 20 conductor entry openings 30 Connecting pin 31 Contact section 32 Passage opening 33 Side thigh 34 transverse legs 40 rejuvenated area 41 Plant section 42 feather bows 43 clamping legs 44 Actuation section 46 clamping edge 50 Rast contour 51 loop-shaped locking element 52 concave inner contour 53 Free space 60 Handle section 61 actuating arms 80 Solution section 81 Release control element 82 drivers 83 Main body 84 Connecting arm 85 Extension 86 Ladder mounting slope 87 Side wall L conductor entry direction V Direction of movement QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] WO 2014 / 124962 A1

[0002]

Claims

Spring-loaded clamping connection for connecting at least one electrical conductor by means of spring force, comprising at least one busbar (3) and a clamping spring (4), wherein the busbar (3) has a contact section (31) for clamping the electrical conductor and the clamping spring (4) has a clamping leg (43) with a clamping edge (46) for pressing the electrical conductor against the contact section (31), wherein the clamping spring (4) has a spring arc (42) adjoining the clamping leg (43) and a contact section (41) adjoining the spring arc (42) by which the clamping spring (4) is attached to the busbar (3), wherein the spring-loaded clamping connection has a retaining element (5) for holding the clamping leg (43) in the open position, wherein the spring-loaded clamping connection has a release element (8) with a release section (80),by the clamping leg (43) held on the retaining element (5) being detachable from the retaining element (5) when the release section (80) is acted upon with a release force, characterized in that the retaining element (5) has at least one loop-shaped locking element (51) on which the clamping leg (43) can be locked in the open position, wherein the release element (8) has at least one driver (82) which is adapted with respect to its outer contour to an inner contour (52) of the at least one loop-shaped locking element (51) and is positively engaged in the inner contour (52) of the at least one loop-shaped locking element (51). Spring force clamp connection according to claim 1, characterized in that the release element (8) has a main body (83) with two connecting arms (84) projecting from the main body (83), wherein a driver (82) is formed on each of the connecting arms (84) which is positively engaged in the inner contour (52) of the at least one loop-shaped locking element (51) or of a further loop-shaped locking element (51). Spring force clamp connection according to claim 2, characterized in that the release section (80) projects from the main body (83) in a different direction than the connecting arms (84). Spring clamp connection according to one of claims 2 to 3, characterized in that a pocket-shaped receptacle for receiving the end of the inserted electrical conductor (9) is formed on the main body (83). Spring clamp connection according to one of claims 2 to 4, characterized in that a conductor receiving ramp (86) for guiding the electrical conductor is formed on the main body (83), which runs at an acute angle to a conductor insertion direction (L) in which the electrical conductor (9) to be clamped is to be inserted into the spring clamp connection. Spring force clamp connection according to one of the preceding claims, characterized in that the release element (8) is designed as a separate component, in particular as a plastic component. Spring clamp connection according to one of the preceding claims, characterized in that the retaining element (5) has two spaced-apart loop-shaped locking elements (51) between which a free space (53) is formed. Spring force clamp connection according to claim 7, characterized in that a projection (85) extends from the main body (83) of the release element (8) into the free space (53) between the spaced-apart loop-shaped locking elements (51). Spring force clamp connection according to one of the preceding claims, characterized in that the inner contour (52) of the at least one loop-shaped locking element (51) has a contour that deviates from the circular shape. Spring-loaded clamping connection according to one of the preceding claims, characterized in that at least one actuating section (44) is formed on the clamping leg (43) on which the clamping leg (43) can be moved from a clamping position to an open position by means of an actuating element, in which the clamping edge (46) of the clamping leg (43) is moved away from the contact section (31) relative to the clamping position. Spring clamp connection according to one of the preceding claims, characterized in that the spring clamp connection has a manual actuating element (6) for moving the clamping leg (43) into the open position, wherein the manual actuating element (6) has a handle section (60) on which the manual actuating element (6) can be manually actuated. Spring force clamp connection according to claim 11, characterized in that the manual actuating element (6) branches out from the handle section (60) into two spaced-apart, substantially parallel actuating arms (61), each of which has a spring-actuating section for applying force to an actuating section (44) of the clamping spring (4). Spring force clamp connection according to one of claims 11 to 12, characterized in that the spring force clamp connection has a movable actuating push button as a manual actuating element (6) which is movable in a displacement direction (V). Spring clamp connection according to claim 13, characterized in that the displacement direction (V) of the actuating push button (6) runs at an angle in the range of 60° to 120°, in particular in the range of 80° to 100°, to the conductor insertion direction (L). Spring force clamp connection according to one of the preceding claims, characterized in that the retaining element (5) is formed integrally with the contact section (41). Spring clamp connection according to one of the preceding claims, characterized in that the busbar (3) has a frame part in which the clamping spring (4) is hooked or clamped, wherein the frame part has a through-opening (32) through which the electrical conductor (9) to be connected can be inserted. Conductor terminal (1) with an insulating housing (2) and a spring-loaded clamping connection according to one of the preceding claims, which is arranged at least predominantly in the insulating housing (2), wherein the insulating housing (2) has a conductor entry opening (20) through which an electrical conductor can be guided in the conductor entry direction (L) to a clamping point between the contact section (31) and the clamping edge (46). Spring clamp connection according to claim 17, characterized in that the spring clamp connection has a manual release control element (81) which can be manually actuated on the outside of the insulating housing (2) to release the clamping leg (43) held on the retaining element (5) from the retaining element (5).

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