Connection device for connecting wire ends

Abstract

The invention relates to a wiring device for connecting wire ends, comprising a housing having a rear wall and a front wall, a bus bar arranged in the housing, a V-shaped clamping spring arranged in the housing, which clamping spring has a supporting leg supported on a support, a clamping leg and a spring back connecting the two legs, the invention relates to a wire connector, in particular a wire connector, comprising a housing, in which a wire introduction channel is formed, via which a wire end to be connected can be introduced into a contact space between the front wall and the rear wall, the housing having a receiving space which is open towards the front wall of the housing for inserting and receiving a clamping spring, a housing projection is formed in the receiving space, and the clamping spring overlaps the housing projection, characterized in that the clamping spring is fixed at least in a form-fitting manner towards the front wall by means of a clamping spring holder integrated in the housing even in a state in which the clamping leg has been moved into the open position, and in that the clamping spring is fixed in a form-fitting manner towards the front wall by means of the clamping spring holder integrated in the housing. And falling from the accommodating cavity is prevented.

Description

Technical Field

[0001] The invention relates to a connection device for connecting conductor ends according to the preamble of claim 1. Background Art

[0002] Such a terminal device is known from DE 10 2011 055 919 A1.

[0003] It is also known from DE 10 2013 108 952 A1 that a cover element is provided on an actuating element for actuating a clamping spring of a terminal device, which cover element is intended to prevent incorrect insertion of multiple conductors and additionally fixes the clamping spring laterally in the housing of the terminal device, and the cover element is laterally integrally formed onto the actuating element. Summary of the invention

[0004] A terminal device of the type described in DE 10 2011 055 919 A1 is to be developed in such a way that the clamping spring is structurally secured particularly well against falling out of the housing.

[0005] The present invention achieves the object through the technical scheme of claim 1. According to this, a wiring device for connecting a wire end is realized, the wiring device comprises a housing having a rear wall and a front wall, a busbar arranged in the housing, and a V-shaped clamping spring arranged in the housing, the clamping spring having a support leg supported on a support, a clamping leg, and a spring back connecting the two legs (support leg and clamping leg), a wire introduction channel is constructed in the housing, through which the wire end to be connected can be introduced into the contact space between the front wall and the rear wall, and the housing has a receiving cavity open to the front wall of the housing for inserting and accommodating the clamping spring, a housing protrusion is constructed in the receiving cavity, the clamping spring overlaps the housing protrusion, and even when the clamping leg has been moved or tensioned to an open position, the clamping spring is fixed at least in a positive locking manner toward the front wall by a clamping spring holder integrated into the housing to prevent it from falling out of the receiving cavity. This open position is a position in which the clamping spring is otherwise aligned with the contour of the receiving opening.

[0006] In this way, the clamping spring is particularly well fixed in a structurally simple manner to prevent it from falling out of the housing. It is particularly advantageous and safe that the clamping spring holder is integrated into the housing and does not have to be arranged on a movable part such as an operating button.

[0007] In this regard, it is preferred and simple if the clamping spring holder is designed in one piece with the housing. The clamping spring holder can also be produced separately and attached to the housing and fixed to the housing, for example by bonding or clamping.

[0008] According to an improved solution that is particularly easy to implement and safe in practice, the clamping spring holder is designed as a wall section of the housing, which is directly connected to the front wall and fixes the clamping spring made of sheet metal on one of its narrow sides to prevent it from falling out of the housing.

[0009] However, according to another simple and safe improvement, the clamping spring retainer can also be designed as a wall section of the housing, which is usually not directly connected to the front wall and which fixes the clamping spring made of sheet metal on one of the narrow sides of the clamping spring to prevent it from falling out of the housing.

[0010] The wall section forming the clamping spring holder can therefore be designed parallel to the front wall and aligned with the front wall so that the support leg or the clamping leg can be placed behind the wall section from the front wall during assembly, which secures the side of the support leg or the clamping leg facing the front wall at least by form locking to prevent it from falling out. According to a preferred (because it is simple and very safe) design, the wall section forming the clamping spring holder is integrally formed onto the housing projection.

[0011] If the housing projection is dimensioned in such a way that, in the assembled state of the clamping spring, it is located between the supporting leg and the clamping leg and forms a deflection path limitation which limits the deflection path of the clamping leg when the clamping spring is open, it can advantageously be provided that the wall section is constructed in this area of ​​the housing projection and preferably additionally fixes the clamping leg in the tensioned state.

[0012] According to another preferred design scheme, it is provided that: the locking hook extends from the rear wall or from another wall section in the accommodating cavity in the direction of the front wall and has a hook section, which completely or partially covers the supporting leg or another section of the clamping spring such as the clamping leg or the bend toward the front wall, which fixes the clamping spring toward the front wall to prevent it from falling.

[0013] The clamping spring holder can therefore be designed as a latching hook which is integrally formed on the housing, behind which the clamping leg can be latched during assembly.

[0014] According to another preferred design scheme, it can be provided that: the wire introduction channel extends into the area of ​​the clamping space and the wire introduction channel is basically covered by the covering section of the front wall toward the front wall, the clamping leg can elastically move from the open position to a contact state, in which the clamping leg presses the wire end onto the busbar, the clamping leg is now in the contact space between the rear wall and the front wall and is fixed in this area by the front wall and additionally in the accommodating space by the spring retainer of the housing to prevent it from falling out of the housing.

[0015] According to a series of advantageous embodiments, the clamping spring holder integrated into the housing is formed in this case, for example by injection molding, before the clamping spring is inserted into the housing.

[0016] Alternatively, however, provision may also be made for the clamping spring holder integrated into the housing to be formed after the clamping spring has been inserted into the housing, in particular by pressing.

[0017] Finally, it is also conceivable within the scope of the invention that the clamping spring holder integrated into the housing is designed as a projection of a busbar which is inserted into the housing and is otherwise immovable.

[0018] The invention also provides an electrical appliance, in particular a junction box or a plug-in connector housing that can be arranged in series, which has one or more connection devices according to any of the preceding claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The invention is explained in detail below with reference to the drawings using preferred embodiments. The invention is not limited to these embodiments but can be varied within the scope of the invention and implemented in other ways. In particular, individual features of individual embodiments can also be combined differently or can be used in other embodiments. In the drawings:

[0020] Figure 1a -d Figure 1a ) shows a side view of a junction box having two connection devices for connecting wires; Figure 1b ) is shown in Figure 1a ) The junction box includes Figure 1a ) in a side view of a partial area of ​​one of the wiring devices; Figure 1c ) is shown in Figure 1a ) The junction box includes Figure 1a ) in a perspective view of a partial area of ​​one of the wiring devices; and Figure 1d ) is shown in Figure 1c ) in the local enlarged view;

[0021] Figure 2a to Figure 2b exist Figure 2a Shown in Figure 1a The metal and control components of the junction box in Figure 2b Shown in Figure 2a ) in perspective view of an element;

[0022] Figure 3a to Figure 3d exist Figure 3a ) shows a side view of another junction box, which has two wiring devices for connecting wires; Figure 3b ) is shown in Figure 3a ) The junction box includes Figure 3a ) in a side view of a partial area of ​​one of the wiring devices; Figure 3c ) is shown in Figure 3a ) The junction box includes Figure 3a ) in a perspective view of a partial area of ​​one of the wiring devices; and Figure 3d ) is shown in Figure 3c ) in the local enlarged view;

[0023] Figure 4a To Figure D Figure 4a ) shows a side view of a third junction box having two connection devices for connecting wires; Figure 4b ) is shown in Figure 4a ) The junction box includes Figure 4a ) in a side view of a partial area of ​​one of the wiring devices; Figure 4c ) is shown in Figure 4a ) wherein one of the junction boxes comprises Figure 4a ) in a perspective view of a partial area of ​​one of the wiring devices; and Figure 4d ) is shown in Figure 4c ) in the local enlarged view;

[0024] Figure 5 A perspective view showing a partial area of ​​a fourth terminal box having at least one terminal device for connecting a conductor;

[0025] Figure 6 A perspective view showing a partial area of ​​a fifth terminal box having at least one terminal device for connecting a conductor;

[0026] FIG. 7 shows in a) and b) perspective views of a partial region of a sixth terminal box having two terminal devices for connecting conductors during two different production steps, respectively;

[0027] Figure 8The diagram shows a perspective view of a partial region of a seventh terminal box which has two connection devices for connecting lines. DETAILED DESCRIPTION

[0028] Figure 1a , Figure 3a and Figure 4a The side views of electrical appliances, which are each designed as a terminal box here, are shown. These appliances each have a housing 2 made of plastic, which here also has two terminal devices 1 for connecting the ends of the conductors. The appliance can also be designed as another appliance. In addition, the corresponding appliance can also have only one or more than two terminal devices 1.

[0029] In the present case, the two terminal devices 1 are thus each designed as a component of a single terminal box, in which two of the terminal devices 1 are arranged in a single housing 2, which can be connected to one another in an electrically conductive manner and are also connected to one another in this case. However, the terminal devices can alternatively also be designed within the meaning of the present application as part of an electrical plug connector, in particular one that can be designed to be arranged in series, or as part of another electrical appliance (not shown here), which has a housing 2 with at least one terminal device 1. The housing 2 is preferably made of insulating plastic. One or more terminal devices 1 can be arranged in each housing 2.

[0030] The following describes a part of the housing 2 which has one of the two terminal devices 1. The other terminal device can be of identical construction or can be symmetrical to the first terminal device, for example with respect to a center plane of the housing 2.

[0031] The housing 2 has two main sides that can be arranged in sequence, of which one main side, here the front wall 21, is partially open, and the other main side, here the rear wall, can be completely or substantially closed. The housing 2 also has one or more narrow sides 23, 24 that connect the front side 21 and the rear side 22 (see, for example, Figure 1c ).

[0032] Fastening elements 25 , such as retaining feet, may be provided on the housing in order to fasten the housing 2 to a mounting substrate, for example a support rail 3 .

[0033] Each terminal device has a clamping spring 11 , with which a conductor end can be pressed onto an electrically conductive busbar.

[0034] The clamping spring 11 can also be designed essentially V-shaped or U-shaped and can have a supporting leg 13 and a clamping leg 15 as well as a spring back 14 connecting the two legs.

[0035] The support leg 13 can be supported on a protrusion of the housing 2 and / or on another support, such as a support leg 121 bent out from the bus bar 12 (see Figure 2a ).

[0036] The clamping spring 11 is preferably manufactured from a metal sheet bent into a V-shape, for example from a steel alloy.

[0037] One or more receiving chambers 26 , 27 extend from the front wall 21 into the housing 2 .

[0038] One of the receiving spaces 26 serves in each case for inserting the clamping spring 11 from the front wall 21 into the housing 2 . This receiving space can also be referred to as the clamping spring receiving space 26 .

[0039] Conversely, another of the accommodating cavities 27 can be used to insert the busbar 12 into the housing 2. This other accommodating cavity can also be referred to as a busbar accommodating cavity 27. The busbar 12 can be formed from a metal strip and preferably bent essentially into an L-shape, and the accommodating cavity 27 can also be designed as an L-shaped gap to a certain extent (see FIG. 1). According to FIG. 2, the two L-shaped busbars 12 are designed as overlapping busbar segments, which are connected to each other in one piece (see Figure 2a ).according to Figure 1a , thus exemplarily realizing a straight-through junction box.

[0040] For insertion into the receiving space 26 of the clamping spring, the clamping spring 11 is preferably slightly tensioned so that the clamping spring 11 can be inserted into the receiving space 26 from the front wall 21. There, the clamping spring in the inserted state preferably overlaps a housing projection 261, on which the clamping spring can rest with its spring back 14. The housing projection 261 can extend in a pin-shaped manner from the rear wall of the housing 2 in the direction of the front wall 21. The housing projection can be so long in the sequential arrangement direction that it extends, for example, to the plane of the front wall 21. The housing projection 261 can also be designed to be rounded upwards so that the rounded spring back 14 rests securely on it. The housing projection 261 can extend further in the receiving space 26 away from the spring back 14 from the section on which the spring back 14 rests. The housing projection 261 can be dimensioned in the direction of the support rail so that it is located between the support leg 13 and the clamping leg 15 in the assembled state of the clamping spring 11. In this case, the housing projection can optionally also constitute a deflection path limiting member, which limits the deflection path of the clamping leg 15 when the clamping spring 11 is opened. The housing projection 261 can also be divided into two sections, between which a gap or the like is formed. The accommodating chamber 26 can also be configured as a V-shaped gap by the housing projection 261.

[0041] A free space 28 can be formed between the receiving cavities 27, 26 for the busbar 11 and the clamping spring 11, between the front wall 21 and the rear wall 22 (not directly visible here, only outlined, in the region of the front wall 21, where the arrow of the reference numeral 28 ends). The clamping leg 15 faces this free space 28 with its free end and is opposite the busbar 11. The free space 28 also serves as a contact space in which the clamping leg 15 can press the conductor end onto the busbar 12. After the clamping spring 11 is mounted, the clamping leg 15 automatically moves into this region covered toward the front wall in the tensioned state.

[0042] One or more (here two) channels are also formed in the housing 2. One of the channels is designed as a wire insertion channel 291. This wire insertion channel extends here in the housing 2 from the narrow side of the housing (here the upper narrow side 23) to the area of ​​the free space 28, so that the wire end can be guided from the narrow side 23 to the contact area between the clamping spring 11 and the busbar 12 (see, for example Figure 1c ). The wire introduction channel 291 can also be configured to be open toward the front side in one or more partial regions. The wire introduction channel 291 can, for example, be opened toward the front wall 21 in a first section starting from the upper narrow side 23 and configured to be closed in another section, so that it can be ensured that the wire end is reliably introduced into the free space 28 and the contact area in the free space 28. The wire introduction channel 291 is configured to be closed to such an extent toward the front wall 21 that multiple strands of wire can also be guided into the area of ​​the free space and the contact space 28 without any problem. The front wall 21 preferably constitutes a kind of tab-shaped extension and cover of the wire introduction channel 291, which extends along the introduction direction of the wire to be clamped until the clamping space 28 and is configured to be integral with the housing 2.

[0043] In order to connect the conductor end, the clamping leg 15 is moved away from the busbar 12, which tensions the clamping spring 11. In this state, the conductor can be guided through the conductor introduction channel 291 until it is guided into the free space and contact space 28 between the free end of the clamping leg 15 and the busbar 12 and between the front wall 21 and the rear wall 22. If the pressure on the clamping leg 15 is now released, it can be relaxed until the conductor end is pressed onto the busbar 12 and the busbar is connected.

[0044] The opening and tensioning of the clamping legs 15 are preferably carried out by means of an operating tool, which can be a separate tool such as a screwdriver or a preassembled element configured as a terminal box. Here, it is also possible to open and tighten the clamping legs 15 by means of a button 16 (see, for example, a button made of plastic). Figure 2a , Figure 2b and Figure 1c) is formed, which is arranged in the actuation channel 292 and can be pressed onto the clamping leg 12 to tension the clamping leg and open the clamping point toward the busbar 12 so that the wire end can be introduced into the free space 28 (see also Figure 2a and Figure 2b ).

[0045] Such a design of such a terminal device is simple and cost-effective.

[0046] In order to prevent the clamping spring 11 (for example in the tensioned state of the clamping leg, where the clamping leg can be aligned with the receiving opening) from falling out of the receiving space 26 in the housing 1 laterally toward the front wall 21, Figure 1a , Figure 3a and Figure 4a as well as Figure 5 , Figure 7a , Figure 7b and Figure 8 In each of the embodiments of the present invention, a clamping spring holder 263 is provided which is integrated into the housing 2. This clamping spring holder 263 can be formed in particular in the region of the receiving chamber 26. The clamping spring holder 263 can be formed integrally with the housing 2, which is particularly simple, cost-effective and safe. However, it can also be provided separately from the housing 2 and attached to the housing, for example, by clamping or bonding, or it can also be inserted into the housing.

[0047] Preferably, the clamping spring retainer 263 can be constructed as an integral section of the housing 2, which can additionally fix the clamping leg 15 or the supporting leg 13 or the spring back 14 toward the front wall 21 to prevent them from falling out of the accommodating cavity in that the integral section covers one of these elements toward the front side at least occasionally or preferably always (the latter meaning in any operating state, whether it is a clamped state or an open state).

[0048] Thus, the clamping spring holder 263 can be designed and arranged like a wall element, for example, in a manner aligned with and / or connected to the front wall 21 essentially parallel to the front wall, so that the support leg 13 or the clamping leg 15 can be placed behind this housing protrusion 263 during assembly (for example in the region of the bend) (see in particular Figure 1b and Figure 1d or Figure 5 ), which fixes the housing projection at least in a form-fitting manner toward the front wall 21 to prevent it from falling, namely even when the clamping leg is tensioned to such an extent that it is otherwise held in the assembly and receiving cavity 26 in a non-form-fitting manner toward the front wall 21.

[0049] Figure 1a to Figure 1dSuch a first design is shown. Here, the clamping spring holder 263 is integrally formed onto the housing projection 263 as an extension of the front wall 21, wherein the clamping leg 15 can be placed behind this extension during assembly so that it can be fixed toward the front wall 21 after assembly to prevent it from falling. If the housing projection 261 is dimensioned so that it is located between the support leg 13 and the clamping leg 15 in the assembled state of the clamping spring 11 and also forms a deflection path limiter that limits the deflection path of the clamping leg 15 when the clamping spring is opened, it is advantageously and simply provided that the wall section 263 is formed in this area of ​​the housing projection 261 in the direction of the clamping leg 15 and fixes the clamping leg 15 well in the tensioned state.

[0050] Figure 6 A similar design is shown. Here, the clamping spring holder 263 is again designed as a protruding extension of the front wall 21, behind which the clamping leg 15 can be placed during assembly so that it is fixed toward the front wall 21 in the tensioned "open" state to prevent it from falling. Figure 6 This fixing does not take place in the central region, but rather towards the free ends of the clamping legs 15 .

[0051] Here, for example, see FIG. Figure 5 or Figure 6 In an embodiment, the projection-like extension 263 can be formed together during the injection molding of the housing, so that during the assembly of the clamping spring, one of its functional elements, such as the clamping leg 15, is placed behind this projection-like extension 263.

[0052] However, it is also conceivable that: see for example Figure 7a and Figure 7b In the embodiment, the protruding extension 263 is formed after the housing is injection molded and after the clamping spring 11 is inserted. Therefore, it can be provided that the housing protrusion 261 has an injection molded extension 2611 (see Figure 7a ), which is formed by pressing after the clamping spring 11 is inserted (for example, using a hot stamping die to form the extension into an annular wall), and the spring back 15 is well fixed behind the extension to prevent it from falling off. Figure 7b Make this status public.

[0053] Figure 5 A similar design is shown. Here, the clamping spring holder 263 is again integrally formed on the housing protrusion 261 as an extension of the front wall 21, but during assembly, the support leg 13 can be placed behind the extension instead of the clamping leg 15, so that the support leg is fixed toward the front wall to prevent it from falling.

[0054] It is also conceivable (but not shown) that the supporting leg 13 as well as the clamping leg 15 and optionally also the spring back 14 are secured against falling by means of a clamping spring holder 263 .

[0055] The clamping spring holder 263 can alternatively also be configured as a hook, in particular as a locking hook 2631, which can be configured integrally with the housing and preferably also in the housing 2 (see Figure 3a to Figure 3d and Figures 4a to 4d and Figure 8 ). This locking hook 2631 can extend from the rear wall 22 or from another housing section such as a housing protrusion in the accommodating chamber 26 in the direction of the front wall according to a design scheme and has a hook section, which preferably covers and acts on the support leg 13 and / or another section of the clamping spring 11 such as the clamping leg 15 or the spring back 14 completely or partially toward the front wall 21, which in turn fixes the clamping spring 11 toward the front wall 21 in a good form-fitting and, if necessary, also materially bonded manner to prevent it from falling.

[0056] according to Figure 3a to Figure 3d and 4a to Figure 4d The locking hook 2631 is arranged at different locations of the housing and at different locations surrounds the narrow side of the support leg 13 in a latching manner, which narrow side faces the open side of the receiving chamber 26 or the front wall 21. Other variants of the arrangement of the locking hook 2631 are also conceivable (which are not shown here).

[0057] according to Figure 8 Finally, it is stipulated that the clamping spring retainer 263 is constructed in the housing 2, and is constructed as a section of the bus bar 12 similar to a clamping cage, which section is basically aligned with the front wall 21 and which section preferably covers and acts on the supporting leg 13 and / or the clamping leg 14 completely or partially toward the front wall 21, which fixes the clamping spring 11 well toward the front wall 21 after the clamping spring 11 is inserted into the housing 2 to prevent it from falling.

[0058] Reference numerals list

[0059] 1 Wiring equipment

[0060] 11 Clamping spring

[0061] 12 Busbar

[0062] 121 Support leg

[0063] 13 Support Leg

[0064] 14 Spring Back

[0065] 15. Tighten your legs

[0066] 16 Buttons

[0067] 2 Housing

[0068] 21 Anterior wall

[0069] 22 Back wall

[0070] 23, 24 narrow side

[0071] 25Fixed parts

[0072] 26, 27 Accommodation chamber

[0073] 261 Housing protrusion

[0074] 263 Clamping spring retainer

[0075] 2631 Locking hook

[0076] 27 Accommodation chamber

[0077] 28 Free Space

[0078] 291 Wire lead-in channel

[0079] 292 Manipulation Channel

[0080] 3 Support rails.

Claims

1. A wiring device used to connect the ends of wires. a. The wiring device has a housing (2) and a busbar (12) arranged in the housing (2), the housing having a rear wall (22) and a front wall (21), and b. The wiring device has a V-shaped clamping spring (11) arranged in the housing (2), the clamping spring having a support leg (13) supported on a support, a clamping leg (5) and a spring back (14) connecting the two legs, c. A wire introduction channel (291) is constructed in the housing (2), through which the end of the wire to be connected can be introduced into the contact space (28) between the front wall (21) and the rear wall (22), and d. the housing (2) has a receiving cavity (26) open toward the front wall (21) of the housing (1) for inserting and receiving the clamping spring (11), a housing protrusion (261) being configured in the receiving cavity, and the clamping spring (11) overlapping the housing protrusion, It is characterized in that e. Even when the clamping leg (15) has been moved to the open position, the clamping spring (11) is fixed toward the front wall (21) at least in a form-locking manner by a clamping spring retainer (263) integrated into the housing (2) to prevent it from falling out of the accommodating cavity (26).

2. The wiring device according to claim 1, characterized in that The clamping spring retaining element (263) is designed to be integral with the housing (1).

3. The wiring device according to claim 1 or 2, characterized in that The clamping spring holder (263) is designed as a wall section of the housing (1), which is connected to the front wall (21) and fixes the clamping spring (11) made of metal sheet on one of its narrow sides to prevent it from falling out of the housing (1).

4. The wiring device according to claim 1 or 2, characterized in that: The clamping spring retainer (263) is designed as a wall section of the housing (1), which is usually not directly connected to the front wall (21) and fixes the clamping spring (11) made of metal sheet on one of its narrow sides to prevent it from falling out of the housing (1).

5. The wiring device according to claim 3 or 4, characterized in that The wall section forming the clamping spring retainer (263) is parallel to the front wall (21) and is constructed in alignment with the front wall so that the supporting leg (13) or the clamping leg (15) can be placed behind the wall section from the front wall during assembly, which fixes the supporting leg or the clamping leg in a form-locking manner toward the side of the front wall (21) to prevent it from falling.

6. The wiring device according to claim 5, characterized in that The wall section (263) forming the clamping spring holder (263) is integrally formed onto the housing projection (261) in the assembly opening (26).

7. The wiring device according to claim 5, characterized in that The housing protrusion (261) is dimensioned such that, in the assembled state of the clamping spring, it is located between the support leg (13) and the clamping leg (15) and forms a deflection path limiting member, which limits the deflection path of the clamping leg (15) when the clamping spring (11) is opened, and the wall section (263) is constructed in this area of ​​the housing protrusion and preferably additionally fixes the clamping leg (15) in a tensioned state.

8. The terminal device according to any one of the preceding claims, characterized in that The clamping spring holder (263) is designed as a locking hook integrally formed on the housing, behind which the clamping spring (11) can be locked during assembly.

9. The terminal device according to any one of the preceding claims, characterized in that The locking hook (61) extends from the rear wall (22) or from another housing section in the accommodating cavity (26) in the direction of the front wall and has a hook section, which completely or partially covers the support leg (12) or another section of the clamping spring (11), such as the clamping leg (15) or the bend (13), toward the front wall (21), thereby fixing the clamping spring (11) toward the front wall to prevent it from falling.

10. The terminal device according to any one of the preceding claims, characterized in that The wire introduction channel (291) extends into the area of ​​the clamping cavity (28) and is substantially covered by a covering section of the front wall toward the front wall (21). The clamping leg (15) can be elastically moved from an open position to a contact state, in which the clamping leg presses the wire end onto the busbar (12). The clamping leg is now in a contact space (28) between the rear wall (22) and the front wall (21) and is fixed in this area by the front wall (21) and additionally in the accommodating cavity (26) by a spring retainer (263) of the housing (2) to prevent it from falling out of the housing (2).

11. The terminal device according to any one of the preceding claims, characterized in that The front wall (21) forms a web-shaped extension of the wire insertion channel (291), which extends along the insertion direction of the wire to be clamped as far as the clamping space (28) and is constructed in one piece with the housing (2).

12. The terminal device according to any one of the preceding claims, characterized in that The clamping spring holder (263) integrated into the housing (2) is formed before the clamping spring is inserted into the housing (13), in particular by injection molding.

13. The terminal device according to any one of claims 1 to 11, characterized in that The clamping spring holder (263) integrated into the housing (2) is formed after the clamping spring has been inserted into the housing (13), in particular by pressing.

14. The terminal device according to any one of the preceding claims, characterized in that The clamping spring holder (263) integrated into the housing (2) is configured as a projection of the busbar (12) inserted into the housing (2).

15. An electrical appliance, in particular a junction box or a plug-in connector housing that can be arranged in series, comprising one or more connection devices according to any of the preceding claims.

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