EP2982011A1

EP2982011A1 - Plug connection device

Info

Publication number: EP2982011A1
Application number: EP14714754.0A
Authority: EP
Inventors: Ralf Geske
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2013-04-05
Filing date: 2014-04-03
Publication date: 2016-02-10
Anticipated expiration: 2034-04-03
Also published as: EP2982011B1; JP2017195202A; CN108054529A; WO2014161965A1; US9806442B2; US20160056552A1; CN105103377B; DE102013103446A1; JP2016518003A; JP6496782B2; EP3301759A1; CN105103377A

Abstract

The invention relates to a plug connection device for connecting a cable having a wire to a printed circuit board (8). The plug connection device comprises a connector (1), which can be connected to a wire of the cable, and a base strip (2), which can be connected to the printed circuit board (8), the base strip (2) comprising a soldering pin which can be electrically connected to a core of the cable in a plug-in region by insertion of the connector (1) into the base strip (2). The soldering pin can be soldered to the printed circuit board (8) in a soldering region to produce a conductive connection. According to the invention, the soldering region of the soldering pin has a plurality of contact zones such that the base strip (2) can be connected to the printed circuit board (8) in various orientations.

Description

Connector device

The invention relates to a connector device for connecting a cable to a printed circuit board.

Making a connection of a cable to a printed circuit board is a common task in the installation of electrical equipment, in the assembly of electronic equipment or in the connection of electronic circuits to external components such as sensors.

In general, this object is achieved by the use of a connector device, which due to many different requirements a variety of

different connector devices is known.

In the development of a connector device are in addition to a variety of parameters such as number of contacts, electrical load capacity (current, voltage), mechanical strength, number of pluggings, IP protection class, insulation, etc., the size and direction in which the connector in Relation to the circuit board to open or close is of no less importance

Importance.

In many cases, cramped spatial conditions, such as the construction of compact electronic devices, leave only a few

mechanical freedom line too. The direction in which a connector device is to be operated is therefore often predetermined.

In the prior art, therefore, connector devices are in otherwise almost identical design sometimes offered in different variants for different directions.

Depending on the installation situation, a designer can resort to various plug-in connection devices, for example horizontally with respect to the printed circuit board or variants which can be operated vertically in relation to the printed circuit board. Depending on the required direction of actuation, a designer uses different products in different situations, whereby the manufacturers in turn offer correspondingly different products. In the chain from manufacture to use, a variety of variants of a component cause significantly higher costs than would be caused by a universally applicable component.

The object of the invention is therefore to provide a connector ^¬ device that allows a wide range of applications, so that the variety of variants can be reduced.

The object is achieved by the features of the subject matter of claim 1. Advantageous embodiments of the invention are set forth in claims 2 to 10.

Accordingly, according to the invention a plug connection ^¬ device for connecting a cable having at least one core is provided with a circuit board, with a plug which is connectable to the wire of the cable, and a base bar which is connectable to the circuit board, wherein the base bar at least one solder pin having, which in a plug-in area by a

Plug the connector onto the base strip with the wire the cable is electrically connectable and in one

Soldering in a contact zone for producing a conductive connection with the circuit board is soldered, characterized in that the soldering area of the soldering pin has a plurality of contact zones, so that the base strip in different, a respective contact zone corresponding alignments with the circuit board is connectable.

The advantage of this solution is that the fact that the base bar is connected in different orientations with the base bar, also - depending on the respective orientation of the base bar - different operating directions for opening and closing the

Plug connection device allows. Thus, the scope of the connector device is increased, so that the variety of variants can be reduced.

Basically, there are many possibilities for aligning the contact zones. Advantageously, however, the contact zones of the solder pin are arranged at a right angle to each other, so that the base bar in two

aligning with each other in a right angle alignments with the circuit board is connectable. Here is under a contact zone of a soldering pin to understand the area with which he with the circuit board

can get in touch.

Depending on the mounting technique used, such as SMD (Surface Mounted Device) or THT

(Through Hole Technology) and THR (Through Hole Reflow), the contact zone preferably consists of a plan

Support surface or a cylindrical, the solder pin partially surrounding the surrounding area. The contact zones are at right angles to each other when the surface vectors of the surfaces with which the

Solder pin can come into contact with the circuit board, forming a right angle. Such an embodiment allows the two frequently occurring in practice actuation directions perpendicular or vertical to

PCB. Advantageously, the soldering pin "J" -shaped, wherein the lower arc of the "J" -shaped

The plug-in area of the soldering pin is advantageously formed by the long shaft of the "J" -shaped soldering pin.

Such a design allows a simple and compact production of the base bar. The solder pin can be formed in this case of a piece of wire, which is so in the

Base bar is fitted so that it can be contacted directly in the mating area of the plug and engages in the soldering area in a recess on the surface of the base strip. By engaging the soldering area of the release pin in a recess of the base bar remains the solder pin

Contactable, while at the same time by a flush

Surface of solder pin and base bar a large, the mechanical strength improving support surface of the base bar is created on the circuit board.

Such an embodiment is preferably suitable for an SMD mounting technique. In another advantageous embodiment, the soldering pin "T" -shaped, wherein a first leg of the "T" shaped solder pin formed a first

A second leg of the "T" -shaped soldering pin forms a second contact zone, and a third leg of the "T" -shaped soldering pin advantageously forms the plug-in region of the soldering pin. This embodiment also allows a simple and compact design of the base strip, wherein in a first manufacturing step, the "T" shaped solder pins can be made by folding a wire or by punching, and in a second manufacturing step, the "T" shaped Soldering pins can be overmolded by a plastic for producing the base strip.

In this embodiment as well, one leg of the "T" -shaped soldering pin can be fitted into the base strip in such a way that it can be contacted directly by the plug in the plug-in area The two other legs of the soldering pin protrude laterally from the base strip and are suitable , the baseboard in different

Mount orientations on a printed circuit board. The respective solder pin pierces the circuit board through a contact hole to be soldered on the back can.

Such an embodiment is preferably suitable for a THT or THR mounting technique.

Independently of a "T" -shaped soldering pin or a "J" -shaped soldering pin protrudes the

Plug area of the solder pin advantageous by the

Bottom rail through, so he over the plug with the Core of the cable is connectable. As a result, the soldering pin can take over both the task of a contact element on one side and that of a plug element on the other side of the base strip.

Further advantageously, the base strip is connectable by means of a solder anchor to the circuit board.

When operating the connector mechanical

Forces occur on the connection between

Acting on the base strip and printed circuit board. In one

unfavorable case, this may cause the

Tear off the base strip from the printed circuit board. When using the SMD mounting technique, the baseboard with lying on the surface of the circuit board traces

soldered. When strong force is applied to the connection between the base strip and the printed circuit board, the

If necessary, tear off conductor tracks from the printed circuit board. For mechanical reinforcement of the connection between

Base bar and circuit board, the base bar can therefore be connected by one or more, for example, on the sides of the base strip mountable solder anchor to the circuit board. Such solder anchors preferably pass through a hole or a continuous opening through the circuit board, so that they can be soldered back.

Advantageously, the base strip provides at least one receptacle for the mounting of a solder anchor, wherein the receptacle is formed so that the solder anchor in different

Alignments with the bottom bar is connectable. The recording can be an integral part of the

Base bar or even a separate, be compared to the base bar movably formed component. Thus, a base bar at their ends rotatable and optionally formed lockable in different positions

Have recordings, so that the baseline in

is alignable to different positions.

Advantageously, the base strip for connection to the circuit board by means of a solder anchor having both a vertical and a horizontal through opening, which is suitable as a receptacle for mounting the solder anchor. In addition, the baseboard can also be more

have continuous openings, for example in 45 degree increments to allow further postions. It is also advantageous that these openings intersect, so that a compact design of the base strip is made possible. Furthermore, it is the object of the invention, a

Specify connector device, regardless of their material, a secure fixation of plug and

Guaranteed basic bar in the inserted state. The solution of this object is achieved according to the invention by the features of the subject matter of claim 11. Advantageous embodiments of the invention are specified in the claims 12 to 16. According to the invention, therefore, a plug connection device is provided with a plug and a base strip, which by means of plug connection in a predetermined

Plug-in direction with each other mechanically and electrically

can be contacted, with the mechanical fixation of the Plug connection device in the inserted state, a latching tab and a detent are provided, the

locked together, characterized in that the latching tab is connected only on one side and the bending axis formed on this side is at an angle to the direction of insertion, which is less than 45 °.

It is essential to the invention that there is only a small angle between the plug-in direction and the bending axis, namely in any case an angle which is less than 45 °. In this case, a fictitious axis is referred to as the bending axis by which the locking tab during the insertion process due to the with

Detent tab coming into contact latching outward

is bent. In fact, in practice, no linear bending axis will occur regularly, but a bending of the locking tab over a certain extended section. To explain the invention, the

For simplicity, however, spoken of a bending axis, which also has a well-defined orientation, so that it can be spoken of an angle between the bending axis and a predetermined direction of insertion.

As previously stated, this angle should be low according to the invention; an angle of less than 45 °

basically suitable. According to a preferred

Development of the invention, however, the angle is even smaller, preferably less than 10 °, and most preferably an angle of 0 is provided. This means that the bending axis runs parallel to the direction of insertion.

In this context, further preferred

provided that the detent arranged and

is formed so that they only at the edge of the plugging operation free end of the locking tab comes into contact with this. While the arrangement of the latch according to the invention

is basically free, as long as it comes to a locking with the locking tab, this preferred embodiment has the following advantage:

If the latch only comes into contact with it at the edge, that is to say at the free end of the latching tab, and pushes it outward, then only such bending of the latching tab that is determined by the height of the latching tab occurs. In the prior art, in which the insertion direction is regularly perpendicular to the bending axis, such a small deflection is not possible. Here, namely, the locking lug is guided far into the locking tab, so that there is a much greater bending of the locking tab, the locking tab is so bent much further. Therefore, according to the presently described preferred embodiment of the invention, it is possible for the

Plug connection device, in particular for the

Snap tab, also use a relatively brittle material, such as LCP with a glass fiber content of 30%.

According to a preferred embodiment of the invention, an opening is further provided for latching the latching lug with the latching tab, behind the latching tab

is arranged. Preferably, the opening to the deflection end of the locking tab is open. Besides that is

preferred that the opening is at least partially rounded in its open end opposite end at least to the locking tab. This causes a mechanical reinforcement of the locking tab and can

Prevent tearing off the locking tab. Finally, it should be noted that the locking tab can basically always be provided on the plug and the latch in principle on the base strip.

According to a preferred embodiment of the invention, however, it is provided that the latching tab is provided on the base strip and the latching lug on the plug.

Furthermore, it is the object of the invention, in an electrical connection device for connecting an electrical conductor, in particular in a

Connector device as described above, a simple and secure connection of an electrical

To ensure conductor. The solution of this object is achieved according to the invention by the features of the subject matter of claim 17. Advantageous embodiments of the invention are set forth in claims 18 and 19. According to the invention is thus an electrical

Connecting device for connecting an electrical

Ladder, in particular a plug connection device, as described above, provided with a housing, provided in the housing terminal spring for electrically contacting the electrical conductor, one with a

Tool-actuated spring opener for opening the spring and a cable insertion funnel for inserting the electrical conductor to the connecting spring, wherein the spring opener and the cable insertion funnel adjoin one another and the

Spring opener an actuating surface for the tool

which is surrounded by a U-shaped wall.

In this way, a secure hold of the tool, such as a screwdriver, achieved on the spring opener, as the U-shaped wall on three sides offers a stop for the tool. That the spring opener and the

Cable entry funnel adjacent to each other, means that these two devices are adjacent to each other, but not directly adjoin one another. Ultimately, the spring opener is provided regularly in the vicinity of the cable entry funnel, since the spring opener is indeed provided for opening the spring, which in the

Conductor insertion funnel to contact imported conductor.

According to a preferred embodiment of the invention it is provided that the opening of the U-shaped wall is located on the side facing away from the cable insertion funnel. Due to this configuration can be ensured that the tool can not slip so that it

Cable entry area concealed above the cable entry funnel. A free accessibility of this area is thus continuous and thus also during the process of

Connecting the cable ensures that without the

Tool can interfere.

It is provided according to a further preferred embodiment, that the actuating direction of the spring opener and the insertion direction of the cable insertion funnel parallel to each other.

The invention will be explained in more detail with reference to the drawing with reference to preferred embodiments.

Show it an embodiment of the base strip of the connector device according to the invention in a perspective view, the embodiment of FIG. 1 in conjunction with a printed circuit board in a vertical

Alignment, the embodiment of FIG. 1 in conjunction with a circuit board in a horizontal orientation, the embodiment of FIG. 2 in lateral, parallel to the direction of insertion cut

Representation, the embodiment of FIG. 3 in lateral, cut parallel to the direction of insertion

Representation, a second embodiment of a base strip of the connector device according to the invention in the side, parallel to the direction of insertion

cut representation and assembly in

vertical alignment, the embodiment of FIG. 6 when mounted in a horizontal orientation, an embodiment of the base strip of the connector device according to the invention in a horizontal orientation from the perspective of

Connecting direction, an embodiment of the invention

Plug connection device in the open position, Fig. 10, the embodiment of FIG. 9 in

closed position,

Fig. 11, the embodiment of FIG. 9 in the unmated

Condition further in detail with respect to locking lug and locking tab, the embodiment of FIG. 11 during the plug-in operation, the embodiment of FIGS. 11 and 12 in the plugged state, the plug previously shown connector with its actuated by a tool

Spring openers in a perspective view, the plug of FIG. 14 in a side view and the plug of FIGS. 14 and 15 partially in section.

Fig. 1 shows an embodiment of the base strip 2 of the connector device according to the invention in

perspective view. The embodiment has a solder pin 3 shown in section, a

Plug-in area 4 and a contact area 5 on. Of the

Plug-in area 4 is open and can be contacted by a plug. The solder pin 3 is J-shaped. In its contact region 5, the section shown in section Solder pin 3, the two contact zones 6 and 7. These

Contact zones 6 and 7 are at a right angle to each other on different sides of the base bar 2 and close with the side surfaces of the base bar 2 each flush. In the embodiment of Figure 1 is the

Contact surface 7 of four solder pins 3 to recognize. It is one for each wire of a multi-core cable

Solder pin 3 provided. Fig. 2 shows the embodiment of Figure 1 in

Connection to a printed circuit board in a vertical

Orientation. The recesses in the base strip 2 receive the solder pins 3, so that a flush footprint for vertical alignment on the circuit board 8 is formed. In the contact zone 6, the solder pin 3 is in contact with the printed circuit board 8 so that it is electrically contactable there with a printed circuit board (not shown) of the printed circuit board 8 in SMD assembly technology. Fig. 3 shows the embodiment of Fig. 1 and Fig. 2 in connection with a printed circuit board 8 in a horizontal orientation. The recesses in the base strip 2 take the solder pins 3, so that a flush

Stand is also formed for a horizontal orientation on the circuit board 8. In this orientation, the soldering pin 3 in the contact zone 7 is in contact with the printed circuit board, so that this there with a (not shown) conductor of the circuit board 8 in SMD assembly technology

electrically contacting is connectable.

Fig. 4 shows the embodiment of Figure 2 in

laterally, cut parallel to the direction of insertion

Representation, wherein additionally the tip of an anchor stem 9 of a solder anchor is visible, the mechanical Attachment of the base strip 2 on the circuit board 8 is used and is passed through a hole in the circuit board 8. Fig. 5 shows the embodiment of Fig. 3 in

laterally, cut parallel to the direction of insertion

Representation, whereby also here the tip of the anchor stem 9 of a solder anchor is visible. Fig. 6 shows a second embodiment of a

Base strip 2 of the plug connection device according to the invention ^¬ in lateral, parallel to the direction of insertion cut representation and installation in vertical

Orientation. The embodiment has a

cut solder pin 3 shown with a plug-in area 4 and a contact area 5 on. The plug-in area 4 is open and can be contacted by a plug. The soldering pin 3 is T-shaped, the contact region 5 of the soldering pin 3 is L-shaped. In this contact region 5, the solder pin 3 shown in section has the two contact zones 6 and 7. These are each in the portion of the L-shaped contact region in which the solder pin 3 the

Printed circuit board 8 with appropriate orientation of

Base bar 2 would touch. In the orientation in this figure 6, the solder pin 3 contacts the circuit board 8 in the contact zone 6. The contact zones 6 and 7 are at right angles to each other on different sides of the base bar 2 and are suitable to pierce the circuit board 8.

Fig. 7 shows the embodiment of Figure 6 at

Mounting in horizontal orientation, with the case of

Alignment in this figure 7, the solder pin 3 the

Printed circuit board 8 in the contact zone 7 touches. Furthermore Here, the tip of the anchor stem 9 of a solder armature can be seen, which is covered in the representation of Figure 6 by the solder pin 3. Fig. 8 shows an embodiment of the base strip 2 of the connector device according to the invention in

horizontal alignment from the point of view of the plug-in direction. FIG. 8 shows by way of example a base strip 2 for

Connecting a multi-core cable to a printed circuit board 8, wherein from the embodiment in Figure 8, the tips of four solder pins 3 for contacting a four-wire

Cable are visible. At the lateral ends transversely to the direction of insertion, the base strip 2 receptacles 11 for receiving solder anchors. The anchor stem 9 a

Solder anchor has a rectangular cross-section and can be inserted into the rectangular formed through openings 11, or passed through.

Both sides of the base strip 2 each have two of these openings, one for each vertical and one

horizontal orientation of the base 2. In Figure 8, only the exposed openings for a vertical

Orientation to recognize well. The openings for the

horizontal alignment are not apparent from this perspective and also each filled by an anchor stem of a solder anchor 9, which projects through the opening of the base strip 2 and the circuit board 8 respectively. The arms of the anchor head 10 of the solder anchor hold the

Base bar 2 on the circuit board 8 firmly. Fig. 9 shows an embodiment of the connector device according to the invention in the open position. From the perspective view of the anchor stem 9 and the anchor head 10 of both sides mounted solder anchor are also visible. FIG. 10 shows the exemplary embodiment of FIG. 9 in the closed position and in the case of horizontal mounting alignment on a printed circuit board 8.

Finally, it can be seen from FIGS. 11, 12 and 13 how a mechanical fixing of plug 1 and base strip 2 takes place with one another. For this purpose, the plug 1 at least on one side, preferably on both sides, a locking lug 12, which in an opening behind a on the

Base bar 2 fastened locking tab 14 can lock. The special feature of this locking connection consists in the fact that in Fig. 12 indicated by a dotted line

Bending axis 13 to the locking tab 14 to the outside

is bent, parallel to that in the same figure

shown insertion direction 15 extends. As explained in detail above, only a slight bending of the locking tab is required in this way, so that plug 1 and 2 baseboard and insbesondere the locking tab 14 may be made of a relatively brittle material without having to fear a material fracture.

Finally, it can be seen in detail from FIGS. 14, 15 and 16 how the spring openers 16 provided in the plug 1 are designed according to a preferred exemplary embodiment of the invention.

The plug 1 has a housing 17 and provided in the housing 17 and not shown connecting springs for electrically contacting electrical conductors. The spring openers 16 are with a tool 18, in this case a screwdriver, actuated to the respective

Open connection spring. In the cable insertion funnel 19, in each case a conductor can be inserted, and the conductor can so that they are guided to the respective connection spring. The direction of actuation of a respective spring opener 16 and the direction of insertion of an associated

Kabeleinführtrichters 19 are parallel to each other.

As can be seen in particular from FIG. 14, the limits are

Spring opener 16 and the associated Kabeleinführtrichter 19 to each other. The spring openers 16 each have one

Actuating surface 20 for the tool, wherein the

Actuating surface 20 is surrounded by a U-shaped wall 21, which in particular Fig. 16 can be removed. About the actuating surface 20 can be exerted on the spring opener 16 pressure to open the spring, and the U-shaped wall 21 ensures a secure hold of the tool 18 on the spring opener 16, since the U-shaped wall 21 on three sides a stop for the tool 18 offers.

As shown in FIGS. 14, 15 and 16, it is further provided that the opening of the U-shaped wall 21 lies on the side facing away from the cable insertion funnel 19. Due to this configuration, it can be ensured that the tool 18 can not obstruct the cable insertion area above the cable insertion funnel 19 in the event of possible slippage.

Reference sign list

Connector 1 Base 2

Solder pin 3

Plug-in area of the solder pin 4

Soldering area of the solder pin 5

First contact zone 6 Second contact zone 7

Printed circuit board 8

Solder anchor, anchor handle 9

Solder anchor, anchor head 10

Pickup 11 Latch 12

Bending axis 13

Latching tab 14

Plug-in direction 15

Spring opener 16 housing 17

Tool 18

Cable insertion funnel 19

Actuating surface 20

U-shaped wall 21

Claims

claims

1. Plug connection device for connecting a cable having at least one core with a

Printed circuit board (8), having a plug (1) which can be connected to the wire of the cable, and having a base strip (2) which can be connected to the printed circuit board (8), the base strip (2) having a soldering pin (3) which, in a plug-in area (4) by plugging the plug (1) on the base strip (2) with the wire of the cable

is electrically connectable and in a soldering region (5) for producing a conductive connection with the

Printed circuit board (8) is solderable, characterized in that the soldering region (5) of the soldering pin (3) more

Contact zones (6, 7), so that the base strip (2) in different orientations with the circuit board (8) is connectable.

2. Plug connection device according to claim 1, characterized in that the contact zones (6, 7) are mutually at a right angle, so that the base strip (2) in two mutually at right angles alignments with the circuit board (8) is connectable ,

3. Plug connection device according to claim 1 or 2, characterized in that the soldering pin (3), "J" -shaped, wherein the lower arc of the "J" -shaped solder pin (3) forms a first contact zone (6) and the short shaft of the "J" shaped solder pin (3) forms a second contact zone (7).

4. Plug connection device according to claim 3, characterized in that the long shaft of the "J" -shaped solder pin (3) forms the plug-in region (4).

5. Plug connection device according to claim 1 or 2, characterized in that the soldering pin (3) "T" -shaped, wherein a first leg of the "T" shaped solder pin (3) forms a first contact zone (6) and a second leg of the "T" shape

formed solder pin (3) forms a second contact zone (7).

6. Plug connection device according to claim 5, characterized in that a third leg of the "T" -shaped solder pin (3) forms the plug-in region (4).

7. Plug connection device according to one of the preceding claims, characterized in that the plug-in region (4) of the soldering pin (3) through the base strip (2) protrudes and via the plug (1) is connectable to a wire of the cable.

8. Plug connection device according to one of the preceding claims, characterized in that the base strip (3) by means of a solder anchor (9, 10) with the circuit board (8) is connectable.

9. Plug connection device according to claim 8, characterized in that the base strip (2) a receptacle (11) for mounting a solder anchor (9, 10) provides, wherein the receptacle (11) is formed so that the solder anchor (9, 10 ) in different orientations with the base strip (2) is connectable.

10. Plug connection device according to one of the preceding claims, characterized in that the base strip (2) for connection to the printed circuit board (8) by means of a Solder anchor (9, 10) has both a vertical and a horizontal through opening, which is suitable as a receptacle (11) for mounting the solder anchor (9, 10).

11. Plug connection device, in particular according to one of claims 1 to 10, with a plug (1) and a base strip (2) which are mechanically and electrically contacted to each other by means of plug connection in a predetermined insertion direction (15), wherein the mechanical

Fixation of the plug connection device in the inserted state, a latching tab (14) and a latching lug (12)

are provided, which are latched together, characterized in that the latching tab (14) is connected only on one side and thereby formed on this side bending axis (12) in such an angle to

Plug-in direction (15) is less than 45 °.

12. Plug connection device according to claim 11, characterized in that the bending axis (12) parallel to

Plug-in direction (15) extends.

13. Plug connection device according to claim 12, characterized in that the latching lug (12) is arranged and designed such that it comes into contact with the plugging operation only at the edge of the free end of the latching tab (14).

14. Plug connection device according to one of claims 11 to 13, characterized in that for latching the latching lug (12) with the latching tab (14) has an opening

is provided, which is arranged behind the locking tab (14).

15. Plug connection device according to claim 14, characterized in that the opening for the deflection of the

Snap tab (14) is open.

16. Plug connection device according to claim 15, characterized in that the opening is at least partially rounded in its open end opposite end at least to the latching tab (14).

17. Electrical connection device for connecting an electrical conductor, in particular

Plug connection device according to one of the preceding

Claims, comprising a housing (17), one in the housing

(17) provided connecting spring for electrical

Contacting the electrical conductor, one with a

Tool (18) actuatable spring opener (16) for opening the spring and a cable insertion funnel (19) for insertion of the electrical conductor to the connecting spring out, wherein the spring opener (16) and the cable insertion funnel (19)

adjacent to each other, characterized in that the spring opener (16) has an actuating surface (20) for the

Tool (18) which is surrounded by a U-shaped wall (21).

18. Electrical connection device according to claim 17, characterized in that the opening of the U-shaped wall (21) on the cable insertion funnel (19)

opposite side is provided.

19. Electrical connection device according to claim 17 or 18, characterized in that the actuating direction of the spring opener (16) and the insertion direction of

Cable insertion funnel (19) parallel to each other.