terminal block

Abstract

The invention relates to a terminal (1) having: - an insulating material housing (2), wherein the insulating material housing has a mounting opening and a conductor introduction opening, - a closure (3), wherein the closure can be introduced into the mounting opening, - a contact insert (12), wherein the contact insert has a busbar (13) and a clamping spring (17a, 17b), wherein the clamping spring has a clamping leg (20a, 20b) which extends towards the busbar, which has a spring clamping edge (21a, 21b) for clamping an electrical conductor, and a first locking connection device (7) which is arranged between the closure and the insulating material housing, wherein the closure and the insulating material housing can be fixed to one another by means of the first locking connection device, wherein a second locking connection device (10) is arranged between the closure and the contact insert, wherein the closure and the contact insert are locked to one another by means of the second locking connection device.

Description

Technical Field

[0001] This invention relates to a terminal block having

[0002] - An insulating housing, wherein the insulating housing has a mounting opening and a wire entry opening.

[0003] - A closure element, wherein the closure element can be introduced into the mounting opening.

[0004] - A contact insert, wherein the contact insert has a busbar and a clamping spring, wherein the clamping spring has clamping legs extending toward the busbar, the clamping legs having spring-clamping edges for clamping electrical wires, and

[0005] - A first locking connection device is provided between the closure and the insulating material housing, wherein the closure and the insulating material housing can be fixed to each other by the first locking connection device.

[0006] Furthermore, the present invention relates to a method for installing such a terminal block. Background Technology

[0007] DE 10 2013 101 830 A1 discloses a terminal block having an insulating housing and a contact plug having a clamping spring, wherein the contact plug is placed on the housing component and can subsequently be inserted into the insulating housing in combination. Summary of the Invention

[0008] Therefore, the purpose of this invention is to provide an improved terminal block.

[0009] The objective is achieved by means of a terminal block having the features of the present invention. Advantageous embodiments are described below.

[0010] In this type of terminal block, a second locking connection device is provided between the closure and the contact plug, wherein the closure and the contact plug can be locked together by the second locking connection device.

[0011] By forming a second locking connection between the enclosure and the contact plug, a safely operable terminal block can be provided in a pre-installed state. This dual locking—locking relative to the insulating housing and locking relative to the contact plug—enables a pre-installed unit consisting of at least the enclosure and the contact plug, and provides a more stable terminal block. Therefore, force does not cause deformation or reduction in the size of the terminal block.

[0012] Furthermore, the enclosure is reliably held within the insulating housing, even when external forces, such as tension or torque, are applied to the terminal block.

[0013] The clamping spring may have a support leg and a spring bow disposed between the support leg and the clamping leg.

[0014] Different embodiments of the first and second locking connection devices are described in detail below. The locking connection devices for the terminal blocks are not limited to any of the embodiments described. More precisely, the locking connection devices can also be configured on the terminal blocks in combination or in increased quantities. Therefore, for example, it is conceivable that the same form of locking connection device is configured on the terminal blocks according to the invention at least once, twice, or three times.

[0015] The second locking connection device can be configured as a locking arm of the closure, wherein the locking arm surrounds the busbar of the contact plug. The locking arm is thus positioned on the closure. During installation of the closure and the contact plug, the locking arm is guided through the contact plug, wherein the end of the locking arm surrounds the contact plug to reliably lock the contact plug onto the closure. It is meaningful to have two locking arms on the closure, each guided through opposite sides of the contact plug, wherein the locking arm surrounds the contact plug. Preferably, a locking hook may be provided on the locking arm, which engages a locking edge rearward on the busbar.

[0016] The insulating housing may have a blocking element that prevents the locking element from releasing. Alternatively, the insulating housing itself may be considered as the blocking element. If the pre-installed closure is guided into the insulating housing via a contact insert, then the insulating housing prevents the second locking connection from releasing.

[0017] Therefore, the aforementioned configuration of the second locking connection device as a locking arm no longer deflects, as this is blocked by the presence of the insulating material housing and / or the blocking element. In this manner, a functionally reliable and safely operable terminal block is provided, wherein the second locking connection device cannot be released without removing the closure from the insulating material housing.

[0018] The first locking connection device can be configured as a locking hook of the insulating material housing, wherein the locking hook engages with an opening in the closure. The locking hook is here disposed on the insulating material housing. The locking hook can be guided into the opening of the closure, wherein the locking hook there locks the insulating material housing onto the closure.

[0019] One consideration is to have a certain gap between the closure and the insulating material housing, so that the closure can spring back when the insulating material housing is installed onto the closure.

[0020] The first locking connection device can be configured as a connecting plate of the closure, wherein the connecting plate surrounds the connecting piece on the insulating material housing. The connecting plate is disposed on the closure, wherein the connecting plate is configured as a flat material piece with a fastening hole. When the closure is installed onto the insulating material housing, the connecting plate is guided via the connecting piece of the insulating material housing, wherein the connecting piece reaches the fastening hole and there locks the closure onto the insulating material housing.

[0021] The first locking connection can be configured as a protrusion of the closure, wherein the protrusion engages in a recess in the insulating material housing. The protrusion can particularly be T-shaped. The protrusion is positioned on the closure, wherein the closure is guided into the recess in the insulating material housing when it is installed onto the insulating material housing. The possible T-shaped design of the protrusion prevents the first locking connection from loosening. Therefore, the connection can no longer be removed without damaging the terminals.

[0022] These designs for the locking connection device can appear in any conceivable combination. For example, it is conceivable that the first locking connection device is configured as a protrusion of the closure, wherein one of the protrusions is T-shaped. It is also conceivable that a connecting plate is provided on the closure and two locking hooks are provided on the insulating housing, which respectively engage with the openings of the closure. Through different combinations of locking connection devices, operationally safe terminal blocks can be provided.

[0023] An inspection opening may be provided on the closure. This inspection opening may be oriented transversely to the conductor to be clamped, extending from the surface of the closure through the closure to the contact insert. Through this inspection opening, the contact insert can be contacted using an external measuring instrument.

[0024] The terminal block may have at least one, preferably two, operating levers, wherein the operating levers are configured for deflecting the clamping legs. This enables the clamping portion to be opened and / or closed simply without any other auxiliary mechanisms.

[0025] The terminal block may have a guide profile for guiding the first locking connection device and / or the second locking connection device. In particular, the guide profile may be a chamfer on the insulating material housing and / or the closure. Such a guide profile simplifies the installation of the terminal block. Thus, for example, the opening of the closure may have a chamfer, wherein the locking hook of the insulating material housing can be guided to the locking position via the chamfer.

[0026] The insulating material housing and the closure can be pressed together in the area of ​​the first locking connection. Through mechanical pressing of the closure relative to the insulating material housing, causing plastic deformation of the closure and / or the insulating material housing, the components can no longer be separated from each other without the corresponding force-consuming failure of the components.

[0027] The first locking connection device and / or the second locking connection device may be disposed in the central region of the terminal block. The terminal block may have a symmetrical configuration, wherein the first locking connection device and / or the second locking connection device are disposed in a plane of symmetry of the terminal block. In particular, the first locking connection device and / or the second locking connection device may be disposed on a plane of symmetry of the terminal block, wherein the plane of symmetry extends perpendicular to the direction of wire introduction.

[0028] The manner described above can provide fully symmetrical terminals, which simplifies the production of such fully symmetrical terminals.

[0029] The terminal block may have two wire entry openings and two clamping springs, wherein the wire entry openings are located on opposite ends of the terminal block. In particular, a first locking connection and / or a second locking connection may be located between the clamping springs of the contact insert. Alternatively or additionally, particularly the first locking connection may be located between the enclosure and the insulating housing on opposite end regions of the terminal block in the longitudinal direction of extension, thus also outside the plane of symmetry of the terminal block. The longitudinal direction of extension here refers to the direction in which the wire is introduced into the wire entry opening.

[0030] Therefore, a terminal block with two opposing clamping portions for two electrical conductors can be provided, the terminal block exhibiting high stability relative to deformation of the insulating housing and / or enclosure. This specifically means that the insulating housing and / or enclosure do not plastically and / or elastically deform under force, such as tension acting on the inserted conductors, and reliably hold the components in their relative positions.

[0031] One of the above-mentioned terminals can be installed according to a method comprising the following steps:

[0032] - Secure the clamping spring to the busbar.

[0033] - Secure the contact plug to the closure.

[0034] Insert the closure into the mounting opening of the insulating material housing.

[0035] - Secure the insulating material housing to the enclosure.

[0036] - Press the closure against the insulating material housing in the area of ​​the first locking connection device.

[0037] By installing the terminal blocks according to the invention in this way, a terminal block that cannot be disassembled from the outside by force can be provided. A very stable connection is established through double locking, which cannot be loosened by subsequent compression. The user therefore can no longer disassemble the terminal blocks, as disassembly would damage the function.

[0038] The indefinite article "one" should be understood in this sense and not as a numeral. Therefore, it is also conceivable that the terminal block according to the invention has multiple contact plugs arranged side-by-side. Here, for example, two, three, four, or five contact plugs can be arranged side-by-side in an insulating housing, wherein each contact plug has two clamping springs for two electrical wires to be clamped. Attached Figure Description

[0039] The present invention will now be described in detail with reference to the accompanying drawings, exemplarily based on embodiments. The drawings show:

[0040] Figure 1 A perspective view of the wiring terminals in the first embodiment is shown;

[0041] Figure 2 Showing according to Figure 1 A perspective view of a closed component with two operating levers for a terminal block;

[0042] Figure 3 Showing according to Figure 1 A cross-sectional view of the wiring terminals;

[0043] Figure 4a Showing according to Figure 1 A side cross-sectional view of the wiring terminals;

[0044] Figure 4b Showing according to Figure 4a A magnified partial view of the wiring terminals;

[0045] Figure 5 A perspective view of the wiring terminals in the second embodiment is shown;

[0046] Figure 6 A perspective view of the wiring terminals in the third embodiment is shown;

[0047] Figure 7 Showing according to Figure 6 A top view of the wiring terminals;

[0048] Figure 8 This shows a contact plug for use in a terminal block;

[0049] Figure 9 Showing according to Figure 1 Exploded view of the wiring terminals of the first embodiment up to 4. Detailed Implementation

[0050] Figure 1 A perspective view of the terminal block 1 in the first embodiment is shown. The basic body of the terminal block 1 is formed by an insulating material housing 2 and a closure 3, wherein the closure 3 is inserted into a mounting opening in the insulating material housing 2. The terminal block 1 has two wire inlet openings 4a and 4b for accommodating electrical wires.

[0051] Furthermore, two operating levers 5a and 5b are visible, with levers 5a and 5b mounted on the enclosure 3. An inspection opening 6 is provided on the enclosure 3, extending vertically from the surface of the enclosure 3 into the interior space of the insulating material housing 2. This inspection opening allows access to conductive components within the insulating material housing 2 using external measuring equipment.

[0052] Clearly, the closure 3 is fixedly connected to the insulating material housing 2 via the first locking connection device 7. The first locking connection device 7 is configured here as a protrusion 8 of the closure 3, wherein the protrusion 8 engages in the recess 9 of the insulating material housing 2 to fix the closure 3 to the insulating material housing 2.

[0053] As can be seen, the terminal block 1 is constructed symmetrically about the plane of symmetry SE, wherein the first locking connection device 7 is disposed in the plane of symmetry SE. The plane of symmetry SE extends perpendicularly to the wire introduction direction L.

[0054] Figure 2 Showing according to Figure 1 The perspective view of the enclosure 3 of the terminal block 1 shows operating levers 5a and 5b disposed thereon. Clearly, a second locking connection device 10 is provided on the enclosure 3, wherein the second locking connection device 10 is configured as a locking arm 11. The second locking connection device is configured to lock the enclosure 3 to the contact plug 12. The second locking connection device 10 is disposed here on the same plane of symmetry SE as the first locking connection device 7. Through double locking, namely the locking of the enclosure 3 relative to the insulating material housing 2 and the locking of the enclosure 3 relative to the contact plug 12, a safely operable terminal block 1 can be provided.

[0055] Furthermore, it can be seen that two protrusions 8 are provided on the opposite sides of the closure 3, the protrusions being configured to engage with the recesses 9 of the insulating material housing 2.

[0056] Figure 3 Showing according to Figure 1A cross-sectional view of terminal 1 is shown, with the cross-section located in the plane of symmetry SE. It can be seen that a busbar 13 for the contact plug 12 is provided within the internal space of the insulating material housing 2, wherein a second locking connection device 10, configured as a locking arm 11, is laterally guided beside and surrounds the busbar 13. A first locking connection device 7, configured as a protrusion 8, engages in a recess 9 of the insulating material housing 2. Thus, a double locking of the closure 3 relative to both the contact plug 12 and the insulating material housing 2 is achieved.

[0057] Clearly, the insulating material housing 2 is configured as a blocking element 14, wherein a portion of the insulating material housing 2, preferably the lateral wall portion, blocks the release of the second locking connection device 10 by preventing the locking arm 11 from deflecting. This means that the locking arm 11 of the second locking connection device 10 can only be released from the busbar 13 when the first locking connection device 7 is released from the insulating material housing 2 first. The locking arm 11 of the second locking connection device 10 is blocked by the presence of the insulating material housing 2.

[0058] In the wiring terminals Figure 1-3 The closure 3 shown does not press against the insulating material housing 2 in the area of ​​the first locking connection device 7. Pressing, however, can be done, for example, by applying a force F to the protrusion 8 of the closure 3. This deforms the protrusion 8, causing a portion of the protrusion 8 to flow into the groove 9a of the recess 9, and loosening of the first locking connection device 7 becomes impossible. The protrusion 8 of the first locking connection device 7 can then no longer be pulled out of the recess 9 due to the deformation of the protrusion 8. Removal of the terminal 1 is no longer possible without damage after the closure 3 is pressed against the insulating material housing 2.

[0059] Figure 4a Showing according to Figure 1 A side sectional view of the terminal block 1. The terminal block has an insulating housing 2 and a closure 3, wherein a contact plug 12 is disposed in the internal space of the insulating housing 3.

[0060] The contact plug 12 has a busbar 13 and two clamping springs 17a and 17b, wherein the clamping springs 17a and 17b are disposed on opposite ends of the busbar 13. The clamping springs 17a and 17b have support legs 18a and 18b that transition into spring bows 19a and 19b and extend into clamping legs 20a and 20b. The clamping legs 20a and 20b each have spring clamping edges 21a and 21b, wherein the spring clamping edges 21a and 21b and the busbar 13 respectively form clamping portions for clamping electrical wires.

[0061] Terminal 1 has two operating levers 5a and 5b, wherein the operating levers 5a and 5b interact with clamping springs 17a and 17b respectively, such that the operating levers 5a and 5b are configured to deflect the clamping legs 20a and 20b.

[0062] Clearly, the additional first locking connection device 7a is configured as a locking hook 22 for the insulating material housing 2 between the closure 3 and the insulating material housing 3. The locking hook 22 is located on the opposite ends of the insulating material housing 2. The locking hook 22 engages with the corresponding opening 23 on the closure 3, thereby locking the insulating material housing 2 and the closure 3 together. The additional locking connection device 7a is thus implemented on the opposite end region of the terminal 1. The additional locking connection device 7a is optional and can be eliminated when the locking requirement of the closure 3 relative to the insulating material housing 2 is low. The additional first locking connection device 7a can also prevent the locking device from loosening by the protrusion or by the pressure of the insulating material housing 2.

[0063] Figure 4b Showing according to Figure 4a A magnified partial view of the wiring terminals. Here, the area of ​​the first locking connection device 7a is shown magnified. It is clear that chamfers 24 are provided on the insulating material housing 2 and on the locking hooks 7a, 22. The chamfers 24 serve as guide contours for guiding the locking hooks 22 of the first locking connection device 7a into the opening 23 of the closure 3. Here, the locking hooks slide along the chamfers 24 into their locked positions, thereby securing the insulating material housing 2 to the closure 3.

[0064] Figure 5 A perspective view of the terminal block 1 in the second embodiment is shown. Figure 5 Terminal 1 in the middle is connected here with Figure 1 The wiring terminal 1 is constructed in the same manner. Figure 5 The wiring terminals and Figure 1 The only difference between the terminal block 1 and the first locking connection device 7 is that the terminal block 1 is different.

[0065] The first locking connection device 7 is configured as a connecting plate 15, which is disposed on the closure 3 of the terminal block 1. The connecting plate 15 is configured as a flat material part having a fastening hole 16. A connecting piece 17 is provided on the insulating material housing 2, wherein the connecting plate 15 surrounds the connecting piece 17, such that the connecting piece 17 is locked in the fastening hole 16, thereby fixing the closure 3 to the insulating material housing 2.

[0066] Figure 6 A perspective view of the terminal block 1 in the third embodiment is shown. Figure 6 The wiring terminals in this section are connected to Figure 1 and 5 The terminals are constructed in a consistent manner. Figure 6 Terminal 1 in the middle is connected here with Figure 1 and 5 The difference between the terminal block 1 and the first locking connection device 7 lies in the composition of the terminal block 1.

[0067] according to Figure 5 The second embodiment and according to Figure 6 In addition to the first locking connection device 7, the terminal block of the third embodiment preferably also has a corresponding component according to the... Figure 1 The second locking connection device 10 of the first embodiment up to 4. Furthermore, preferably, the terminals of the second and third embodiments additionally or alternatively have a corresponding... Figure 4a and 4b The other locking connection device 7a.

[0068] The first locking connection device 7 has protrusions 8 on opposite sides of the terminals 1, each protrusion 8 engaging with a recess 9 in the insulating material housing 2. Notably, one of the protrusions 8 is T-shaped. This T-shaped configuration of the protrusion 8 prevents deflection of the wall of the insulating material housing 2 by the side recess of the closure 3 and the insulating material housing 2, thereby preventing the locking connection device 7 from loosening.

[0069] Figure 7 Showing according to Figure 6 A top view of terminal 1. Clearly, the T-shaped design of the protrusion 8 makes it difficult for the closure 3 to separate from the insulating housing 2. The recess 9 of the insulating housing 2 is configured to engage the T-shape of the protrusion 8 from the rear, thus blocking all degrees of freedom of the protrusion 8 except for one.

[0070] If the additional unobstructed degree of freedom is blocked by another protrusion 8, then it is no longer possible for the closure 3 to be released from the insulating housing 2 without damaging the terminal block 1.

[0071] Figure 8 A contact plug 12 for insertion into the aforementioned terminal block 1 is shown. The contact plug 12 has a busbar 13, with clamping springs 17a and 17b respectively provided at opposite ends of the busbar 13. The clamping springs 17a and 17b each have support legs 18a and 18b that transition into spring bows 19a and 19b and extend into clamping legs 20a and 20b. The clamping legs 20a and 20b extend here into the busbar 13, and have spring-clamping edges 21a and 21b that form clamping portions with the busbar 13 for clamping electrical wires to be clamped.

[0072] As can be seen, wire receiving sections 25 for clamping electrical wires are provided at opposite ends of the busbar 13. Clearly, the wire receiving sections 25 are configured to be closed on the circumferential side.

[0073] Furthermore, it can be seen that two retaining sections 27a and 27b are provided on the cover surface 26 of the busbar 13, wherein the retaining sections 27a and 27b are respectively provided on opposite ends of the cover surface 26. One of the clamping springs 17a and 17b is self-supportingly suspended in the retaining sections 27a and 27b, indicating that there is no additional fastening mechanism.

[0074] However, it is also possible to consider that the clamping springs 17a and 17b are configured as a single clamping spring with two clamping legs 20a and 20b, wherein the single clamping spring extends over the cover surface 9 of the busbar 13.

[0075] Figure 9 The basis shown in the first embodiment Figure 1 An exploded view of terminal 1. It can be seen that, according to... Figure 8 The contact plug can be inserted into the insulating material housing 2 of the terminal block 1.

[0076] It is clear how the terminal block 1 according to the invention can be installed. In the first step, the closure 3 is locked onto the busbar 13 of the contact plug 12 by means of a locking arm 11 configured as a second locking connection device 10. The locking arm 11 engages the U-shaped busbar 13 from below.

[0077] In the second step, the operating levers 5a and 5b can be installed on the closure 3 and the contact plug 12. Alternatively, the second step can be performed before the first step.

[0078] In the third step, the pre-installation unit, comprising the closure 3, contact plug 12, and operating levers 5a and 5b, is inserted into the insulating material housing 2 through the installation opening 28. Here, the insulating material housing 2 is secured to the closure 3 by a first locking connection device 7 and another first locking connection device 7a. The first locking connection device 7 is located on the closure 3, and the other first locking connection device 7a is located on the insulating material housing 2.

[0079] Clearly, the first locking connection device 7 engages with a corresponding recess 9 on the insulating material housing 2. Here, the closure 3 is fixed to the insulating material housing 2. A further first locking connection device 7a additionally supports this fixation. The recess 9 is circumferentially closed here. This specifically means that the first locking connection device 7 can only be guided into the recess 9 with one degree of freedom.

[0080] In an optional fourth step, the closure 3 may be pressed against the insulating material housing 2 in the area of ​​the first locking connection device 7 and / or another first locking connection device 7a.

[0081] List of reference numerals in the attached diagram:

[0082] 1. Terminal block

[0083] 2. Insulating material housing

[0084] 3. Enclosure

[0085] 4a, 4b Wires are introduced into the openings

[0086] 5a, 5b levers

[0087] 6. Check the opening

[0088] 7 First locking connection device

[0089] 7a Additional first locking connection device

[0090] 8. Protrusion

[0091] 9 recess

[0092] 9a The groove of the recess

[0093] 10 Second locking connection device

[0094] 11 Locking Arm

[0095] 12 Contact Plug-in

[0096] 13 Busbars

[0097] 14. Blocking elements

[0098] 15 Connecting Plate

[0099] 16 Fastening holes

[0100] 17a, 17b Clamping springs

[0101] 18a, 18b Supporting legs

[0102] 19a, 19b Spring bows

[0103] 20a, 20b Clasp your legs together

[0104] 21a, 21b Spring-clamped edges

[0105] 22 Locking hook

[0106] 23 Opening

[0107] 24. Bevel

[0108] 25. Conductor housing section

[0109] 26 Coverage

[0110] 27a, 27b Maintaining sections

[0111] 28 Installation opening

[0112] F force loading

[0113] L-direction of wire introduction

[0114] SE symmetry plane

Claims

1. A terminal block (1) comprising: - Insulating material housing (2), wherein the insulating material housing (2) has a mounting opening (28) and a wire introduction opening (4a, 4b). - A closure (3), wherein the closure (3) can be introduced into the mounting opening. - A contact plug (12), wherein the contact plug (12) has a busbar (13) and clamping springs (17a, 17b), wherein the clamping springs (17a, 17b) have clamping legs (20a, 20b) extending toward the busbar (13), the clamping legs having spring clamping edges (21a, 21b) for clamping electrical wires, and - A first locking connection device (7) is provided between the closure (3) and the insulating material housing (2), wherein the closure (3) and the insulating material housing (2) can be fixed to each other by the first locking connection device (7). A second locking connection device (10) is provided between the closure (3) and the contact plug (12), wherein the closure (3) and the contact plug (12) can be locked together by the second locking connection device (10). Its features are, The closure (3) is fixed to the side wall of the insulating material housing (2) by means of the first locking connection device (7), and the side wall constitutes a blocking element (14) to prevent the second locking connection device (10) from being released.

2. The terminal block (1) according to claim 1. Its features are, The clamping spring (17a, 17b) has a support leg (18a, 18b) and a spring bow (19a, 19b) disposed between the support leg (18a, 18b) and the clamping leg (20a, 20b).

3. The terminal block (1) according to claim 1 or 2. Its features are, The second locking connection device (10) is configured as the locking arm (11) of the closure (3), wherein the locking arm (11) surrounds the busbar (13).

4. The terminal block (1) according to claim 1 or 2. Its features are, The first locking connection device (7) is configured as a locking hook (22) of the insulating material housing (2), wherein the locking hook (22) engages with the opening (23) in the closure (3).

5. The terminal block (1) according to claim 1 or 2. Its features are, The first locking connection device (7) is configured as the connecting plate (15) of the closure (3), wherein the connecting plate (15) surrounds the connecting piece on the insulating material housing (2).

6. The terminal block (1) according to claim 1 or 2. Its features are, The first locking connection device (7) is configured as a protrusion (8) of the closure (3), wherein the protrusion (8) engages in a recess (9) of the insulating material housing (2).

7. The terminal block (1) according to claim 6. Its features are, The protrusion (8) is T-shaped.

8. The terminal block (1) according to claim 1 or 2. Its features are, An inspection opening (6) is provided on the closure (3).

9. The terminal block (1) according to claim 1 or 2. Its features are, The terminal block (1) has an operating lever (5a, 5b), wherein the operating lever (5a, 5b) is configured to deflect the clamping legs (20a, 20b).

10. The terminal block (1) according to claim 1 or 2. Its features are, The terminal block (1) has a guide profile for guiding the first locking connection device (7) and / or the second locking connection device (10).

11. The terminal block (1) according to claim 10. Its features are, The guide profile is a chamfer (24) on the insulating material housing (2) and / or the closure (3).

12. The terminal block (1) according to claim 1 or 2. Its features are, The insulating material housing (2) and the closure (3) are pressed together in the area of ​​the first locking connection device (7).

13. The terminal block (1) according to claim 1 or 2. Its features are, The first locking connection device (7) and / or the second locking connection device (10) are disposed in the middle area of ​​the terminal block (1).

14. The terminal block (1) according to claim 13. Its features are, The terminal block (1) has a symmetrical structure, wherein the first locking connection device (7) and / or the second locking connection device (10) are disposed in the plane of symmetry (SE) of the terminal block (1).

15. The terminal block (1) according to claim 14. Its features are, The first locking connection device (7) and / or the second locking connection device (10) are disposed on the plane of symmetry (SE) of the terminal (1), wherein the plane of symmetry (SE) extends perpendicular to the direction of wire introduction (L).

16. The terminal block (1) according to claim 1 or 2. Its features are, The terminal block (1) has two wire inlet openings (4a, 4b) and two clamping springs (17a, 17b), wherein the wire inlet openings (4a, 4b) are disposed on opposite ends of the terminal block (1).

17. The terminal block (1) according to claim 16. Its features are, The first locking connection device (7) and / or the second locking connection device (10) are disposed between the clamping springs (17a, 17b).

18. The terminal block (1) according to claim 3. Its features are, The two locking arms (11) surround the busbar (13) from both sides respectively, and the two side walls prevent the second locking connection device (10) from being released from both sides respectively.

19. The terminal block (1) according to claim 18. Its features are, Each of the lateral wall portions has a recess (9) on its upper part that engages with the first locking connection device (7), and a blocking element (14) is formed on its lower part.

20. A method for installing a terminal block (1) according to any one of claims 1 to 19, the method comprising the following steps: - Secure the clamping springs (17a, 17b) to the busbar (13). - Lock the contact plug (12) onto the closure (3), - Insert the closure (3) into the mounting opening (28) of the insulating material housing (2). - Fix the insulating material housing (2) onto the closure (3), - Press the closure (3) against the insulating material housing (2) in the area of ​​the first locking connection device (7).

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