Spring force clamping connection

Abstract

The invention relates to a spring-loaded clamping connection (1) with a busbar (2) and a clamping spring (3a, 3b) which has a clamping leg (6a, 6b), wherein the clamping leg (6a, 6b) extends towards the busbar (2) and has a spring clamping edge (7a, 7b) for clamping an electrical conductor (17), and wherein the busbar (2) has a busbar clamping edge (11a, 11b) for fixing the electrical conductor (17) to be clamped, wherein the busbar clamping edge (11a, 11b) has a radius less than or equal to 0.2 mm.

Description

[0001] The invention relates to a spring-loaded terminal connection with a busbar and a clamping spring having a clamping leg, wherein the clamping leg extends towards the busbar and has a spring clamping edge for clamping an electrical conductor, and wherein the busbar has a busbar clamping edge for fixing the electrical conductor to be clamped.

[0002] DE 40 146 770 A1 discloses a terminal block for electrical conductors comprising a busbar and a clamping spring, wherein the clamping spring and the busbar form a clamping point for the electrical conductor to be connected. The busbar has a toothed strip for securing the electrical conductor.

[0003] DE 20 2013 001 487 U1 discloses a spring-loaded terminal with a busbar and a clamping spring, wherein the busbar and the clamping spring form a clamping point for an electrical conductor to be clamped and wherein retaining tabs for fixing the electrical conductor are projected from the busbar.

[0004] DE 20 2013 101 751 U1 discloses a compression spring terminal with a busbar and a clamping spring, wherein a first contact zone for electrically contacting an inserted electrical conductor is protruded from the busbar.

[0005] DE 20 2005 018 168 U1 discloses a conductor terminal with a busbar and a clamping spring. The clamping spring has a clamping leg and, together with the busbar, forms a clamping point for an electrical conductor to be clamped. The clamping point protrudes from the busbar.

[0006] DE 10 2014 102 517 A1 discloses a spring-loaded terminal contact for contacting electrical conductors with a busbar and a plurality of adjacently arranged clamping springs. The busbar and a respective clamping spring form a clamping point for the electrical conductor to be clamped in order to contact a plurality of adjacent electrical conductors. The spring-loaded terminal contact has a clamping spring with a spring clamping edge and a busbar with a clamping edge, the clamping edge and the spring clamping edge forming a clamping point for the electrical conductor.

[0007] DE 20 2016 104 374 U1 discloses a spring-loaded terminal with a busbar and a clamping spring, wherein the clamping spring has a clamping leg for forming a clamping point for an electrical conductor to be clamped, wherein the clamping point is projected out of the busbar.

[0008] DE 10 2016 105 192 B3 discloses a conductor connection terminal with a busbar with raised elevations, wherein the elevations serve to fix an electrical conductor between a clamping point and the busbar.

[0009] DE 10 2014 119 421 A1 discloses a conductor connection terminal for clamping electrical conductors, wherein the electrical conductor can be clamped between a clamping spring and a busbar.

[0010] US 2018 / 0323522 A1 discloses a terminal block with a busbar that has a contact surface with grooves across its entire width. The electrical conductor is placed on this grooved surface and clamped there by spring force.

[0011] WO 2017 / 182647 A1 discloses a plug contact with a connection area having a plurality of grooves aligned diagonally to the conductor insertion direction.

[0012] Based on this, the object of the present invention is to create an improved spring-loaded terminal connection.

[0013] The object is achieved with a spring-loaded terminal connection having the features of claim 1. Advantageous embodiments are described in the subclaims.

[0014] For the spring-loaded terminal connection of this type, it is proposed that the busbar clamping edge have a radius of less than or equal to 0.2 mm. Furthermore, it is advantageous if the busbar clamping edge has a radius of less than or equal to 0.1 mm.

[0015] By designing a busbar clamp edge with a very small radius, a spring-loaded terminal connection is created that has a high conductor holding force. Particularly with fine-stranded and / or multi-core conductors, high conductor holding forces are necessary to ensure that the electrical conductor to be clamped is securely held in the spring-loaded terminal connection. With multi-core conductors, the problem can arise that only the outer cores of the conductor are subjected to a holding force from the spring-loaded clamp edge. This holding force may not be sufficient to securely clamp such multi-core conductors if, for example, a tensile force acts on these conductors. Furthermore, the conductors may be damaged if the holding force causes the outer cores to be torn out of the conductor.

[0016] A busbar clamping edge increases the holding force of the spring-loaded terminal connection by providing the electrical conductor to be clamped with additional holding force from the busbar clamping edge in addition to the spring-loaded edge. The holding force of the busbar clamping edge can be further increased by ensuring that the radius of the busbar clamping edge is less than or equal to 0.2 mm, and in particular less than or equal to 0.1 mm. By creating a small radius for the busbar clamping edge, the busbar clamping edge is sharp. Sharp means that the busbar clamping edge can cut into the electrical conductor to be clamped, and the busbar clamping edge thus digs into the electrical conductor to be clamped. This allows a greater holding force to be applied to the electrical conductor to be clamped, ensuring that the conductor is securely fixed in the spring-loaded terminal connection.Furthermore, even with multi-core conductors, this allows the outer cores on two opposite sides of the multi-core conductor to be subjected to increased holding force. This ensures a higher overall holding force than if the spring clamp edge were to dig into the cores of the multi-core electrical conductor.

[0017] It is conceivable for the busbar clamping edge to have a smaller radius, such as less than or equal to 0.075 mm, less than or equal to 0.05 mm, less than or equal to 0.025 mm, or less than or equal to 0.01 mm. Reducing the radius can provide a sharper busbar clamping edge that can cut more easily into the electrical conductor being clamped, thus digging deeper into the conductor.

[0018] The clamping spring may have a contact leg and a spring arch arranged between the contact leg and the clamping leg.

[0019] Such a spring-cage terminal connection does not necessarily have to have a busbar clamping edge with a radius of less than or equal to 0.2 mm. It is also conceivable to provide the following spring-cage terminal connection: a spring-cage terminal connection with a busbar and a clamping spring having a clamping leg, wherein the clamping leg extends toward the busbar and has a spring clamping edge for clamping an electrical conductor, and wherein the busbar has a busbar clamping edge for securing the electrical conductor to be clamped.

[0020] The busbar clamping edge can have an asymmetrical contour with respect to a plane of symmetry, with the plane of symmetry extending orthogonally to the busbar through the busbar clamping edge. The busbar clamping edge can form a barb for the electrical conductor to be clamped or have a barb-like effect on the electrical conductor to be clamped.

[0021] The busbar clamping edge can be designed such that when the electrical conductor to be clamped is pulled, the busbar clamping edge cuts into the electrical conductor to be clamped. This can be achieved, for example, by forming the aforementioned barb. The barb is a hook that is attached to the busbar facing backwards and thereby prevents the electrical conductor to be clamped from moving backwards when plugged in and thus from being pulled out of the spring-loaded terminal connection. "Facing backwards" means that the radius of the busbar clamping edge is aligned in the direction of conductor insertion of the electrical conductor to be clamped, so that when the conductor is pulled against the conductor insertion direction, the busbar clamping edge digs into the conductor material and fixes it in the spring-loaded terminal connection.However, a barb does not mean that the connection between the busbar clamping edge and the electrical conductor to be clamped can no longer be broken. For example, an actuating element, such as an actuating lever, an actuating tool, or a screwdriver, can deflect the clamping leg of the clamping spring, thus releasing the clamping connection with the electrical conductor.

[0022] In this way, a high holding force of the spring-loaded terminal connection on the electrical conductor to be connected can be achieved. The holding force defines the force that must be applied to release the electrical conductor from the terminal by pulling against the conductor insertion direction.

[0023] According to the invention, the busbar clamping edge is arranged across the width of the busbar transversely to the electrical conductor to be clamped.

[0024] By arranging the busbar clamping edge across the width of the busbar, a busbar clamping edge can be provided that can dig into the electrical conductor to be clamped over a correspondingly large length. This increases the contact surface on the electrical conductor to be clamped, while also allowing the holding force to be evenly transferred to the electrical conductor to be clamped, thus further improving the conductor's fixation.

[0025] According to the invention, the busbar clamping edge extends over part of the width of the busbar, with the other part forming at least one busbar web. By forming a busbar web, the stability of the busbar and the flow of current through the busbar can be ensured. Since the busbar clamping edge can reduce stability and current flow, it has been found that the busbar clamping edge cannot be formed over the full width of the busbar, but only over part of the width of the busbar. This still makes it possible to provide a sufficiently large contact surface for the electrical conductor to be clamped, while at the same time ensuring the flow of current through the busbar and the stability of the busbar.However, this does not mean that the stability and current flow through the busbar are not sufficient if the busbar clamping edge is formed over the entire width of the busbar.

[0026] The busbar clamping edge can be arranged on a busbar clamping section cut or punched out of the busbar. It is also advantageous if the busbar clamping section is arranged on the busbar in front of the busbar clamping edge in the direction of a conductor insertion direction.

[0027] The busbar clamping section is a section that is protruded from the busbar, for example by punching or cutting out, wherein the busbar clamping edge is arranged on this busbar clamping section.

[0028] The busbar can have a tab for attaching the clamping spring, with the clamping spring being self-supporting and insertable into the tab. This has the advantage that the clamping spring can be attached to the busbar without additional fasteners.

[0029] According to the invention, the busbar has a recess designed to accommodate the spring clamping edge. The recess is located in front of the busbar clamping edge in the conductor insertion direction.

[0030] The recess creates a receptacle for the spring clamp edge, providing additional stability for the clamp spring when the electrical conductor to be clamped is not plugged in. This increases the transport safety of the spring clamp connection, allowing the spring clamp connection to be safely transported in a pre-assembled state.

[0031] According to the invention, a recess is arranged in the area of the busbar clamping edge. The recess is located behind the busbar clamping edge in the conductor insertion direction. This recess creates a busbar clamping edge at a sufficient height relative to the busbar so that the busbar clamping edge can dig into the electrical conductor to be clamped over this height. However, it is important to ensure that the height is limited, as otherwise damage to the electrical conductor to be clamped may occur.

[0032] The distance of the support surface of the depression in the conductor insertion direction behind the busbar clamping edge to a plane parallel to the conductor insertion direction and running through the busbar clamping edge can be greater than the distance of the busbar in the area of the support of the spring clamping edge in the conductor insertion direction in front of the busbar clamping edge to a plane parallel to the conductor insertion direction and running through the busbar clamping edge.

[0033] In this way, a busbar clamping edge can be provided which can dig into the electrical conductor to be clamped over the larger distance. Such a design can be achieved, for example, by a curvature in the busbar or by forming a thicker busbar in the area in front of the busbar clamping edge.

[0034] The spring-loaded terminal connection can have an insulating housing, wherein the insulating housing has at least one conductor insertion opening and one clamping spring. It is further advantageous if the insulating housing has at least two conductor insertion openings and at least two clamping springs, wherein the conductor insertion openings are arranged at diametrically opposite ends of the spring-loaded terminal connection.

[0035] It is conceivable for the two clamping springs to be formed as a single piece, with the clamping springs sharing a common contact leg, with the contact leg merging at each end into a spring bend, which in turn each extends into a clamping leg with a spring clamping edge. The spring-loaded terminal connection should thus be designed in such a way that two opposing electrical conductors can be electrically connected.

[0036] The spring clamp connection can be made with the following steps: Punching out the outer contour of the busbar. Cutting out or punching out the busbar clamping section, whereby the busbar clamping section is exposed from the sheet plane. Bending the busbar contour. Embossing the depression behind the busbar clamping section to form the clamping edge.

[0037] It has been shown that a sharp clamping edge with a radius of less than or equal to 0.2 mm can be produced by first cutting or punching out a busbar clamping section from the busbar and then embossing the depression behind the busbar clamping edge to create a small radius. By embossing the depression, the lateral edge areas of the busbar next to the busbar clamping section can be advantageously lowered relative to the busbar clamping section, so that the busbar clamping section, with the now free-standing busbar clamping edge, protrudes from the busbar surface. The embossing (folding) process thus leaves a sharp cut edge.

[0038] A recess can also be stamped in front of the busbar clamping edge. This process step can be performed simultaneously with the stamping of the recess or in a separate step after the stamping of the recess.

[0039] The indefinite term "a" is to be understood as such and not as a numeral. It is also conceivable that the spring-loaded terminal connection according to the invention has a plurality of conductor entry openings, clamping springs, and busbars. It is thus possible for the spring-loaded terminal connection to have two adjacent busbars, each with two clamping springs, so that a total of four electrical conductors can be clamped to the spring-loaded terminal connection. However, it is also possible for three, four, or five adjacent busbars, each with two clamping springs, to form a spring-loaded terminal connection according to the invention.

[0040] The invention is explained in more detail below using exemplary embodiments and the accompanying drawings. They show: Figure 1 - an embodiment of a spring clamp connection in a perspective view; Figure 2a - a spring clamp connection according to Figure 1 in a sectional side view without an inserted electrical conductor; Figure 2b - an enlarged section of a spring-loaded terminal connection according to Figure 2a ; Figure 2c - an enlarged section of a conductor system section according to the Figures 1 to 2b in a plan view; Figure 3a - a spring clamp connection according to the Figures 1-2b in a sectional side view with inserted electrical conductor; Figure 3b - an enlarged section of a spring clamp connection according to Figure 3a .

[0041] Figure 1shows a perspective view of a first embodiment of a spring-loaded terminal connection 1. The spring-loaded terminal connection 1 has a busbar 2, with a clamping spring 3a, 3b arranged at each of the diametrically opposite ends of the busbar 2. The clamping springs 3a, 3b each have a contact leg 4a, 4b, which merges into a spring bend 5a, 5b and extends into a clamping leg 6a, 6b. The clamping leg 6a, 6b extends to a section of the busbar 2, with the clamping leg 6a, 6b having a spring clamping edge 7a, 7b and, together with the busbar 2, forming a clamping point for an electrical conductor to be clamped.

[0042] It can be seen that a conductor receiving section 8 for the electrical conductor to be clamped is arranged at each of the diametrically opposite ends of the busbar 2. It is clear that the conductor receiving sections 8 are circumferentially closed. The conductor receiving sections 8 have a ceiling section 9a, 9b assigned to the contact leg 4a, 4b, a ceiling surface 9, and a base section 12 assigned to the spring clamping edge 7a, 7b. The respective ceiling section 9a, 9b and the base section 12 are connected to one another via two side surfaces 13 and form a continuous, circumferentially closed conductor receiving section 8.

[0043] Viewed in the respective conductor insertion direction L, in front of the conductor receiving sections 8a, 8b, the busbar component 2 has a preferably integrally formed, tab-shaped conductor contact section 2a, 2b, against which the spring clamping edge 7a, 7b preferably rests in the closed state without an inserted electrical conductor. The conductor contact sections 2a, 2b are preferably inclined relative to the conductor insertion direction L and form a conductor insertion surface or conductor insertion slope.

[0044] It can also be seen that two tabs 10a, 10b are arranged on a ceiling surface 9 of the busbar 2, with the tabs 10a, 10b each being arranged at the diametrically opposite ends of the ceiling surface 9. One of the clamping springs 3a, 3b is suspended in each of the tabs 10a, 10b in a self-supporting manner, i.e., without additional fastening means.

[0045] However, it is also conceivable that the clamping springs 3a, 3b are designed as a single clamping spring with two clamping legs 7a, 7b, wherein the single clamping spring extends on the ceiling surface 9 of the busbar 2.

[0046] Figure 2a shows a spring clamp connection 1 according to Figure 1in a sectional side view without an inserted electrical conductor. It can be seen that the busbar 2 has a busbar clamping edge 11a, 11b in the area of the spring clamping edges 7a, 7b. The busbar clamping edges 11a, 11b can be provided in the area of the conductor contact sections 2a, 2b. The busbar clamping edges 11a, 11b have a radius of less than or equal to 0.2 mm, in particular a radius of less than or equal to 0.1 mm. By designing the busbar clamping edge 11a, 11b with a very small radius, a spring-loaded terminal connection 1 is provided that has a high conductor holding force.By forming a small radius of the busbar clamping edge 11a, 11b, the busbar clamping edges 11a, 11b are formed so sharp that they can cut into an electrical conductor to be clamped and the busbar clamping edge 11a, 11b thus digs into the electrical conductor to be clamped, whereby a corresponding conductor holding force can be achieved.

[0047] However, it is also conceivable for the busbar clamping edges 11a, 11b to have even smaller radii. This would further improve the effect of cutting into the electrical conductor.

[0048] It can be seen that the base section 12 of the busbar 2 can form a support for the electrical conductors to be clamped. The base section 12 can comprise the tab-like conductor contact sections 2a, 2b. The base section 12 and the cover surface 9 are connected to one another via two opposite side surfaces 13. It is clear that the base section 12 and the side surfaces 13 have a recess 14. It is also clear that the cover surface 9 is designed as a conductor insertion slope, with the cover surface 9 being V-shaped. The cross-section of the conductor receiving sections 8 tapers towards the center of the spring-loaded clamp connection 1. In this way, an electrical conductor can be inserted into the larger cross-section of the conductor receiving sections 8, with the electrical conductor being able to be guided towards the clamping point through the tapered cross-section.

[0049] Figure 2bshows an enlarged section of the spring clamp connection 1 according to Figure 2a The area around the busbar clamping edge 11a is shown enlarged. It is clear that the busbar clamping edge 11a is arranged on a busbar clamping section 18. The busbar clamping section 18 is cut or punched out of the busbar 2.

[0050] It can also be seen that the busbar 2 has a depression 15 and a recess 16, wherein the depression 15 is arranged behind the busbar clamping edge 11a with respect to a conductor insertion direction L, and the recess 16 is arranged in front of the busbar clamping edge 11a with respect to the conductor insertion direction L. The recess 16 is designed such that it can accommodate the spring clamping edge 7a when no electrical conductor is inserted into the spring-loaded terminal connection 1. In this way, the clamping spring 3a can be further stabilized, whereby the transport safety of the spring-loaded terminal connection 1 can be increased.

[0051] The recess 15 allows a busbar clamping edge 11a to be created at a sufficient height relative to the busbar so that the busbar clamping edge 11a can dig into the electrical conductor to be clamped at this height. However, it is important to limit the height, as otherwise damage to the electrical conductor to be clamped may occur.

[0052] It is also clear that the distance ΔA2 from a plane E parallel to the conductor insertion direction L and extending through the busbar clamping edge 11a to the busbar 2 in the conductor insertion direction L behind the busbar clamping edge 11a is greater than the distance ΔA1 in front of the busbar clamping edge 11a. The support surface of the recess 15 is used as the reference point behind the busbar clamping edge 11a. In the conductor insertion direction L in front of the busbar clamping edge 11a, the area where the spring clamping edge 7a, 7b rests on the conductor contact section 2a, 2b is the reference point.

[0053] Figure 2c shows an enlarged section of the conductor system section 2a according to the Figures 1 to 2bin a top view. It is clear that the busbar clamping edge 11a is arranged on the exposed busbar clamping section 18. The busbar clamping section 18 is preferably punched out of the material of the busbar 2, with the busbar clamping section 18 protruding in a U-shape from the conductor contact section 2a of the busbar 2.

[0054] It can also be seen that the busbar clamping section 18 is protruded from the busbar 2 in front of the busbar clamping edge 11a in the conductor insertion direction L.

[0055] Figure 3a shows a spring clamp connection 1 according to the Figures 1-2b in a sectioned side view with an inserted electrical conductor 17. Figure 3b shows an enlarged section of the spring clamp connection 1 according to Figure 3a The area around the busbar clamping edge 11a is shown enlarged.

[0056] It is clear that the electrical conductor 17 is held clamped between the spring clamping edge 7a and the busbar clamping edge 11a on the base section 12 of the busbar 2. The busbar clamping edge 11a is designed as a barb, whereby the busbar clamping edge 11a cuts into the electrical conductor 17 when pulled opposite to the conductor insertion direction L and thus digs into the electrical conductor 17. In this way, a correspondingly high holding force can be exerted on the electrical conductor 17, whereby the electrical conductor 17 can be held fixedly in the clamping point of the spring-loaded terminal connection 1.

[0057] The busbar clamping edge 11a can be designed to be stiffer than the spring clamping edge 7a. The increased stiffness of the busbar clamping edge 11a compared to the clamping spring 7a ensures that the busbar clamping edge 11a cuts into the electrical conductor to be clamped. List of reference symbols

[0058] 1 Spring-loaded terminal connection 2 Busbar 2a, 2b Conductor contact section 3a, 3b Clamping spring 4a, 4b Contact leg 5a, 5b Spring bend 6a, 6b Clamping leg 7a, 7b Spring clamping edge 8 Conductor receiving section 9 Ceiling surface 9a, 9b Ceiling section 10a, 10b Tab 11a, 11b Busbar clamping edge 12 Floor section 13 Side surfaces 14 Recess 15 Countersink 16 Deepening 17 Electrical conductor 18 Busbar clamping section ΔA1, ΔA2 Distance E Level L Conductor insertion direction

Claims

1. A spring-loaded terminal connection (1) comprising a busbar (2), a clamping spring (3a, 3b) that has a clamping arm (6a, 6b), the clamping arm (6a, 6b) extending towards the busbar (2) and has a spring clamping (7a, 7b) edge to clamp an electrical conductor (17), wherein the busbar (2) has a busbar clamping edge (11a, 11b) (17) to fix the electrical conductor to be clamped, wherein the busbar clamping edge (11a, 11b) is arranged across the width of the busbar (2) transversely to the electrical conductor (17) to be clamped, wherein the busbar clamping edge (11a, 11b) extends over only part of a conductor contact section (2a) of the busbar (2), so that the busbar clamping edge (11a, 11b) extends over only part of the width of the busbar (2), wherein the remaining part forms at least one busbar web, wherein the busbar clamping edge (11a, 11b) has a radius less than or equal to 0.2 mm, wherein the busbar (2) has a recess (16), and wherein the recess (16) is designed to receive the spring clamping edge (7a, 7b) and is located in front of the busbar clamping edge (11a, 11b) with respect to the conductor insertion direction (L), characterized in, that a depression is located in the area of the busbar clamping edge (11a, 11b) behind the busbar clamping edge (11a, 11b) with respect to the conductor insertion direction (L).

2. Spring-loaded terminal connection (1) according to claim 1, characterized in, that the clamping spring (3a, 3b) has a contact arm (4a, 4b) and a spring bend (5a, 5b) located between the contact arm (4a, 4b) and the clamping arm (6a, 6b).

3. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the busbar clamping edge (11a, 11b) has a radius less than or equal to 0.1mm.

4. Spring-loaded terminal connection (1) according to one of the preceding claima, characterized in, that the busbar clamping edge (11a, 11b) has an asymmetrical contour with respect to a plane of symmetry, wherein the plane of symmetry extends through the busbar clamping edge (11a, 11b) orthogonally to the busbar (2).

5. Spring-loaded terminal connection according to one of the preceding claims, characterized in, that the busbar clamping edge (11a, 11b) forms a barb for the electrical conductor (17) to be clamped.

6. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the busbar clamping edge (11a, 11b) is designed such that when the electrical conductor (17) to be clamped is pulled, the busbar clamping edge (11a, 11b) cuts into the electrical conductor (17) to be clamped.

7. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the busbar clamping edge (11a, 11b) is arranged on a busbar clamping section (18), which is cut or punched out from the busbar (2).

8. Spring-loaded terminal connection (1) according to claim 7, characterized in, that the busbar clamping section (18) is located on the busbar (2) in front of the busbar clamping edge (11a, 11b) with respect to the conductor insertion direction (L).

9. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the busbar (2) has a tab (10a, 10b) for fastening the clamping spring (3a, 3b), and wherein the clamping spring (3a, 3b) is adapted to be inserted into the tab (10a, 10b) in a self-supporting manner.

10. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the busbar (2) at least partially contains copper.

11. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the distance (ΔA1) of a plane (E) parallel to the conductor insertion direction (L) and running through the busbar clamping edge (11a, 11b) to the busbar (2) behind the busbar clamping edge (11a, 11b) in the conductor insertion direction (L) is greater than a distance in front of the busbar clamping edge (11a, 11b).

12. Spring-loaded terminal connection (1) according to one of the preceding claims, characterized in, that the spring-loaded terminal connection (1) has an insulating material housing, wherein the insulating-material housing has at least one conductor insertion opening and a clamping spring (3a, 3b).

13. Spring-loaded terminal connection (1) according to claim 12, characterized in, that the insulating-material housing has at least two conductor insertion openings and at least two clamping springs (3a, 3b), wherein the conductor insertion openings are located at diametrically opposite ends of the spring-loaded terminal connection (1).

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