EP3910741A1 - Conduit connection element - Google Patents

Abstract

A conductor connection contact element (1) for clamping an electrical conductor with a busbar piece (2) and a clamping spring (3) is described. The busbar piece (2) is formed from a sheet metal part with an opposing second side wall (4, 5), a bottom section (7) and an opposing cover section (6). The side walls (4, 5) with the base section (7) and the cover section (6) delimit a conductor entry channel (8). The clamping spring (3) is arranged on the busbar piece (2). It has a contact section (9) at a first end region and a clamping section (11) with a clamping edge (22, 36, 41) for clamping the electrical conductor on the second end region, which is opposite the first end region. The contact section (9) is arranged on the bottom section (7) of the busbar section (2). The clamping section (11) extends with its freely movable end towards the cover section (6). Seen across the conductor insertion direction (L) of the clamping section (11), a for an operating tool accessible operating section available. A conductor guide region (14, 34) adjoining the clamping section (11) is formed on the first side wall (4). The conductor guide area (14, 34) is a section of the first side wall (4) which is oriented obliquely in the direction of the opposite second side wall (5).

Description

The invention relates to a conductor connection contact element for clamping an electrical conductor with a busbar piece, which consists of a sheet metal part with a first side wall and a second side wall opposite the first side wall, a floor section extending from the first side wall to the opposite second side wall and a floor section opposite and facing each other is formed from the first side wall to the opposite second side wall extending cover section, wherein the side walls with the bottom section and the cover section delimit a conductor insertion channel, and with a clamping spring arranged on the busbar piece, which has a contact section at a first end area and a contact section at the second end area that supports the Opposite the first end region, has a clamping portion with a clamping edge for clamping the electrical conductor. The contact section is arranged on the bottom section of the busbar piece. The clamping section extends with its freely movable end towards the cover section.

Such conductor connection contact elements are used in a variety of forms. The present conductor connection contact element is primarily intended and designed to be placed directly on a circuit board and soldered to the circuit board in order to create a circuit board contact for connecting an electrical conductor by means of a spring-loaded terminal connection. The conductor connection contact element is provided so that it can be used without a surrounding insulating housing.

DE 20 2013 105 670 U1 shows a connection for light emitting diodes with an insulating material housing provided with pushbuttons and a plurality of conductive contact units located in the insulating material housing. The contact units are made up of two metal strips. The first metal strip has an upwardly raised metal wall which is curved inward on the top to form a semicircle. The second metal strip is connected at one end to the upper end of the first metal strip and is provided with two branching tongues at its other end. One of the branching tongues is provided for clamping the electrical conductor. The other branching tongue is aligned with the pushbutton so that the pushbutton can be pressed against the second metal strip to open the clamping point formed by the first branching tongue and the first metal strip for clamping an electrical conductor.

DE 20 2014 101 856 U1 discloses a quick connect terminal having a conductive copper bar and a flexible conductive steel sheet attached to the copper bar. For this purpose, holding plates opposite one another are bent from the copper web, on which the steel sheet is supported. Between the clamping section of the steel sheet for clamping an electrical conductor and the bottom section of the copper web, a guide web is bent from the holding plates at an angle into the conductor entry channel in order to guide an electrical conductor to be clamped from the left and right side in the direction of the clamping jaw, which through the clamping plate and the copper bar is formed.

WO 2014/124475 A2 discloses a connecting or connecting terminal for electrically connecting at least one conductor and to an electrical contact body. The connection terminal has an insulating material housing in which the contact body is arranged. The contact body has a stamped part with an opening and a spring element arranged in the opening. That The spring element is designed as a U-shaped bent leg spring with a contact section, an adjoining spring bow and a clamping leg opposite the contact section and adjoining the spring bow. The contact leg rests on a bottom section of the stamped part. The clamping leg is oriented towards the cover section of the stamped part to form a clamping point for clamping an electrical conductor. To open the clamping point, an operating tool can be placed on the clamping leg through an opening in the insulating material housing in order to move it away from the cover section of the stamped part.

Based on this, the object of the present invention is to create an improved conductor connection contact element for clamping on an electrical conductor.

The object is achieved with the conductor connection contact element having the features of claims 1 and 15. Advantageous embodiments are described in the subclaims.

For a conductor connection contact element which has a busbar piece and a clamping spring, it is proposed that, viewed transversely to the direction of longitudinal extension of the clamping section, an actuating section accessible for an actuating tool be present next to the clamping edge. A conductor routing area adjoining the clamping section is formed on the first side wall. The conductor guide area is a section of the first side wall which is oriented obliquely in the direction of the opposite second side wall.

The conductor connection contact element is designed with the aid of the actuation section on the clamping section in such a way that the clamping point for clamping an electrical conductor can be opened by applying force to the actuation section with the aid of an actuation tool. Here the The clamping edge of the clamping section, which lies next to the actuating section, is moved away from the cover section of the busbar piece. With the help of the conductor guide area, which is aligned obliquely on the first side wall to the opposite second side wall, an electrical conductor is moved towards the clamping edge and prevents the conductors as a whole or, if necessary, strands of a finely stranded electrical conductor from getting into the area of the actuating section.

With the aid of this conductor guide area on the first side wall, a section of the side wall for guiding an electrical conductor to be clamped to the clamping edge is thus provided. With this conductor routing area of the first side wall, the actuating section of the clamping spring, which has clamping and actuating sections arranged next to one another, is also covered when viewed in the conductor insertion direction. This creates a very compact and reliable conductor connection contact element, the clamping point of which can be displaced in the direction of the bottom section with an operating tool in order to open the clamping point.

The actuation section can have an actuation tab protruding laterally from the first side wall. This does not rule out the fact that the actuating section has a further actuating tab that also protrudes laterally from the clamping section on the opposite side.

In this respect, the indefinite term “a” is not to be understood as a numerical word in the context of this invention.

An operating tool can be attached to the conductor connection contact element through the operating tab protruding from the side wall. For this purpose, the operating tool is placed on the operating tab and a force is exerted on the operating tab to open the clamping point. The operating tool is preferably a screwdriver, but can also be the finger of a user.

The conductor connection contact element can have an opening on the first side wall for the actuating tab to pass through. The conductor routing area is oriented away from the end edge of the first side wall that delimits the opening and is opposite the conductor routing area. This prevents an electrical conductor to be clamped, which is inserted into the conductor entry channel, as a whole or with its strands from hitting the front edge of the first side wall exposed through the opening. The conductor guide area thus keeps the opening with the front edges delimiting the opening free of an electrical conductor that has been introduced and clamped.

The conductor routing area can be designed as a material tongue of the first side wall which is directed obliquely in the direction of the second side wall and towards the clamping section. The material tongue is not connected to the bottom section and the cover section. Rather, the material tongue is exposed from the bottom section and the cover section. The material tongue can lie in the space between the cover section and the clamping section, so that the clamping spring is positioned between the bottom section and the material tongue. Thus, a free space for the clamping spring is provided between the base section and the cover section, which space is partially closed with the at least one material tongue in order to provide a conductor guide.

The actuating section can have an actuating tab extending in the direction of the plane of the cover section. This actuating tab is then arranged offset in the direction of extent of the clamping section next to the clamping edge. In this way, the point of application for actuation is shifted towards the top on the cover section of the conductor connection contact element.

However, it is also conceivable that the actuation section is an actuation tab which is arranged laterally in an opening in the first side wall, which is arranged behind the exposed end of the material tongue, viewed in the conductor insertion direction, and is accessible from the outside.

At the rear end of the busbar piece, which is opposite the conductor entry channel, an end stop can be formed by a material flap bent from a side wall, from the bottom section or from the cover section. The sheet metal part of the busbar section can thus be reshaped in a very simple manner in such a way that a conductor collecting pocket is formed.

It is conceivable that flaps of material facing one another are bent from both walls in order to form an end stop.

The contact section can be clamped between the side walls and the bottom section. The clamping spring can thus be clamped onto the busbar piece in a simple manner and fixed in position there.

It is also conceivable, however, that the contact section is fixed in position on the busbar piece with a fixing section protruding from the contact section into an opening of the bottom section or with a fixing section protruding from the bottom section into an opening of the contact section. The fixing section can be a tab or an embossing or the like. In this way, after the clamping spring has been hooked into the busbar piece, the clamping spring can be prevented from slipping in a simple manner.

The clamping spring can have a spring bow connecting the contact section to the clamping section and can thus be designed, for example, as a leg spring bent in a U-shape. From at least one side wall, seen in the conductor insertion direction, a conductor guide plane is then in the direction in front of the spring arch the opposite side wall bent. This conductor routing plane is located in front of the spring arch in the conductor insertion direction and serves to guide an electrical conductor past the spring arch to the clamping section. For this purpose, the conductor routing plane is oriented obliquely in the conductor insertion direction towards the cover section. This conductor routing level can be created quite easily from the sheet metal part by bending a section from the side wall.

The cover section or the bottom section can have a solder connection area. This solder connection area can be, for example, as a solder connection lug exposed from the cover section or bottom section. However, it is also conceivable that parts of the cover section or bottom section themselves are used for soldering on a circuit board.

An overload stop bracket which extends in the direction of the opposite side wall and which is positioned in the space between the clamping section and the bottom section can protrude from one side wall. Such a tab can also be very easily formed out of the sheet metal part by being bent over in a section of the side wall that forms a lateral opening into the interior of the cage-shaped conductor connection contact element.

A generic conductor connection contact element can also be designed in that the clamping spring has an actuating section and that the actuating section is designed as an actuating tab arranged laterally from the clamping section of the clamping spring and protruding laterally from the first side wall.

In the case of such a cage-like conductor connection contact element, a very simple and compact design is achieved with a terminal point that can be opened using an operating tool or the finger of a user for clamping an electrical conductor in that an actuating tab protrudes laterally from the first side wall of the busbar section.

Figur 1 -

perspektivische Ansicht einer ersten Ausführungsform eines Leiteranschlusskontaktelementes;

Figur 2 -

Seitenansicht des Leiteranschlusskontaktelementes aus Figur 1;

Figur 3 -

Seiten-Schnittansicht durch das Leiteranschlusskontaktelement aus Figur 2;

Figur 4 -

perspektivische Ansicht des Stromschienenstücks des Leiteranschlusskontaktelementes aus Figur 1;

Figur 5 -

perspektivische Ansicht der Klemmfeder des Leiteranschlusskontaktelementes aus Figuren 1 bis 3;

Figur 6 -

perspektivische Ansicht einer zweiten Ausführungsform eines Leiteranschlusskontaktelementes;

Figur 7 -

Seitenansicht des Leiteranschlusskontaktelementes aus Figur 6;

Figur 8 -

Seiten-Schnittansicht durch das Leiteranschlusskontaktelement aus Figur 7;

Figur 9 -

perspektivische Ansicht der Klemmfeder des Leiteranschlusskontaktelementes aus Figuren 6 bis 8;

Figur 10 -

perspektivische Ansicht einer dritten Ausführungsform eines Leiteranschlusskontaktelementes von der ersten Seite;

Figur 11 -

perspektivische Ansicht des Leiteranschlusskontaktelementes aus Figur 10 von der zweiten Seite;

Figur 12 -

Seitenansicht des Leiteranschlusskontaktelementes aus Figur 10;

Figur 13 -

Seiten-Schnittansicht des Leiteranschlusskontaktelementes aus Figur 12;

Figur 14 -

perspektivische Schnittansicht des Leiteranschlusskontaktelementes aus Figur 10 bis 13;

Figur 15 -

perspektivische Ansicht des Stromschienenstücks des Leiteranschlusskontaktelementes aus 10;

Figur 16 -

perspektivische Ansicht der Klemmfeder des Leiteranschlusskontaktelementes aus Figuren 10 bis 14;

Figur 17 -

perspektivische Ansicht einer vierten Ausführungsform eines Leiteranschlusskontaktelementes;

Figur 18 -

Seitenansicht des Leiteranschlusskontaktelementes aus Figur 17;

Figur 19 -

Seiten-Schnittansicht durch das Leiteranschlusskontaktelement aus Figur 18;

Figur 20 -

perspektivische Ansicht des Stromschienenstücks des Leiteranschlusskontaktelementes aus Figur 17;

Figur 21 -

perspektivische Ansicht der Klemmfeder des Leiteranschlusskontaktelements aus Figuren 17 bis 19.

The invention is explained in more detail below using exemplary embodiments with the accompanying drawings. Show it:

Figure 1 -

perspective view of a first embodiment of a conductor connection contact element;

Figure 2 -

Side view of the conductor connection contact element Figure 1 ;

Figure 3 -

Side sectional view through the conductor connection contact element Figure 2 ;

Figure 4 -

perspective view of the busbar piece of the conductor connection contact element Figure 1 ;

Figure 5 -

perspective view of the clamping spring of the conductor connection contact element Figures 1 to 3 ;

Figure 6 -

perspective view of a second embodiment of a conductor connection contact element;

Figure 7 -

Side view of the conductor connection contact element Figure 6 ;

Figure 8 -

Side sectional view through the conductor connection contact element Figure 7 ;

Figure 9 -

perspective view of the clamping spring of the conductor connection contact element Figures 6 to 8 ;

Figure 10 -

perspective view of a third embodiment of a conductor connection contact element from the first side;

Figure 11 -

perspective view of the conductor connection contact element Figure 10 from the second side;

Figure 12 -

Side view of the conductor connection contact element Figure 10 ;

Figure 13 -

Side sectional view of the conductor connection contact element Figure 12 ;

Figure 14 -

perspective sectional view of the conductor connection contact element Figures 10 to 13 ;

Figure 15 -

perspective view of the busbar section of the conductor connection contact element from FIG. 10;

Figure 16 -

perspective view of the clamping spring of the conductor connection contact element Figures 10 to 14 ;

Figure 17 -

perspective view of a fourth embodiment of a conductor connection contact element;

Figure 18 -

Side view of the conductor connection contact element Figure 17 ;

Figure 19 -

Side sectional view through the conductor connection contact element Figure 18 ;

Figure 20 -

perspective view of the busbar piece of the conductor connection contact element Figure 17 ;

Figure 21 -

perspective view of the clamping spring of the conductor connection contact element Figures 17 to 19 .

Figure 1 shows a perspective view of a first embodiment of a conductor connection contact element 1, which is formed from a busbar piece 2 and a clamping spring 3 inserted therein. The busbar piece 2 is formed in the shape of a cage from a sheet metal part. It has a first side wall 4 and an opposite, second side wall 5. These two side walls 4 and 5 are connected to one another via a cover section 6. In the illustrated embodiment, the cover section 6 is formed integrally with the two side walls 4 and 5 by means of bends.

Opposite the cover section 6, the busbar piece 2 has a bottom section 7, which likewise extends from the first side wall 4 to the second side wall 5. The bottom section 7 is formed by folding over the second side wall 5 and abuts the first side wall 4. It is therefore not connected to the first side wall 4 in a materially bonded manner.

The first and second side walls 4 and 5, which are spaced apart from one another, as well as the cover and base sections 6 and 7, which extend transversely thereto and are also spaced apart from one another, form a conductor insertion channel 8 bounded, which is provided for inserting and conducting an electrical conductor and for receiving the clamping spring 3.

The clamping spring 3 is designed as a U-shaped bent leg spring with a contact section 9 supported on the base section 7, an adjoining spring bow 10 and a clamping section 11 protruding in the conductor insertion direction L, ie in the direction of the conductor insertion channel 8 or obliquely into this conductor insertion channel 8 . The clamping section 11 extends with its freely movable end towards the cover section 6.

It becomes clear that the first side wall 4 has an opening 12 for the passage of an actuating tab 13 protruding laterally from the clamping section 11. By exerting an actuating force on the actuating tab 13, the clamping section 11 can be displaced in the direction of the contact section 9 against the spring force of the clamping spring 3. In this way, a clamping point formed between a clamping edge of the clamping section 11 and the busbar piece 2 is opened for clamping an electrical conductor.

The actuating tab 13, which forms an actuating section, lies next to this clamping edge, seen transversely to the direction of longitudinal extent of the clamping section 11. A conductor guide region 14, which is formed on the first side wall 4, adjoins the clamping section located in the interior of the busbar section 2 and therefore not visible. For this purpose, a section of the first side wall 4, which lies between the area of introduction to the clamping section and the actuating section, is oriented obliquely in the direction of the opposite second side wall 5 and in the direction of the clamping section 11. An electrical conductor introduced into the conductor entry channel 8 is guided to the clamping edge with the aid of this conductor guide area 14 and this conductor or stranded wire of a finely stranded conductor is prevented from reaching the actuating section and possibly in the Exit the area of the actuating tab 13 from the busbar section 2 through the opening 12.

It is also clear that on the first side wall 4 there is an overload stop bracket 15 which points towards the second side wall 5 and which forms an end stop for the clamping section 11. The clamping section can only be pressed down in the direction of the contact section 9 until it strikes the overload stop bracket 15.

With the help of this overload stop bracket 15, the clamping spring 3 is also fixed in position on the busbar section 2. This positional fixing is also achieved by a trough or opening 16 in the contact section 9, into which an embossing of the bottom section 7 dips. Optionally, the contact section 9 can also be welded, riveted, screwed or otherwise fastened to the base section 7. It is also conceivable that a fixing section, e.g. in the form of a tab, is set off from the contact section 9 and protrudes into an opening in the bottom section 7.

It is also clear that, in the exemplary embodiment shown, conductor guide planes 17 are bent off from both side walls 4 and 5 in the area immediately in front of the spring bow 10. These sheet metal sections of the busbar section 2, which form a conductor guide, are oriented at an angle in the conductor insertion direction L towards the cover section 6. This creates a funnel-shaped conductor entry channel 8 in which an electrical conductor is guided past the spring bow 10 at least in the lower region to the inclined plane of the clamping section 11.

As an alternative to this illustrated embodiment of the conductor guide planes 17 bent from both side walls 4 and 5, it is also conceivable that the conductor guide plane 17 is formed only from a sheet metal part bent from one side wall 4 or 5, which is then attached to the opposite side wall adjoins and extends up to this side wall.

It is also clear that the cover section 6 has narrower tabs 18a, 18b exposed, at the opposite end regions of the cover section 6, which are used to connect the busbar section 2 during manufacture in the production tool. The soldering of the contact on the circuit board takes place on the underside of the base section 7. The upper side of the cover section 6 is required as a flat suction surface for an automatic circuit board assembly with a suction gripper. The conductor connection contact element 1 can, however, under certain circumstances also be placed with the cover section 6 on a circuit board and soldered there with the tabs 18a, 18b with conductor tracks on the circuit board. The lugs 18a, 18b then form solder connection areas.

It can also be seen that at the rear end of the busbar section 2, which is opposite the conductor insertion channel 8, an end stop 19 is formed by a material flap bent from at least one of the side walls 4, 5. It becomes clear that a flap of material is bent from the first side wall 4 to form the end stop 19 in the direction of the opposite second side wall 5.

Figure 2 shows a side view of the conductor connection contact element 1 from FIG. It becomes clear that the overload stop bracket 15 directly adjoins the contact section 9. A movement of the clamping spring 3 in the conductor insertion direction L is thus prevented.

It can also be seen that the conductor routing plane 17, viewed in the conductor insertion direction L, is placed in front of the arched spring 10 and oriented at an angle in such a way that the routing plane 17 indicated by the kink is continued approximately above the transition between the arched spring 10 and the adjoining clamping section 11. This makes an electrical conductor safe out on the plane of the clamping section 11 without hitting the spring bow 10. The conductor guide area 14 formed on the first side wall 4 then extends at a distance from this. This area is shaped from the first side wall 4 in the direction of the opposite second side wall 5. It is materially connected to the first side wall 4 and can be cut free from the first side wall 4 in partial areas, for example in the upper section.

It is also clear that the actuation tab 13 present on the actuation section protrudes laterally out of the opening 12 and the opening 12 enables an unimpeded movement of the clamping section 11 in the direction of the contact section 9 for opening the clamping point. The overload stop bracket 15 is also not in the way of the actuating bracket 13. Rather, the overload stop is provided by the area with the clamping edge that adjoins the actuating tab.

Figure 3 omits a side sectional view of the conductor connection contact element 1 Figure 2 recognize. It is clear here that the inside of the cover section 6 has impressions 20 with which clamping projections 21 are formed. It can also be seen that the clamping section 11 has a clamping edge 22 at its freely movable end which, in the idle state shown, rests against the inside of the cover section 6 without an inserted electrical conductor. It ends, for example, at such a clamping projection 21. An electrical conductor inserted and clamped between the clamping edge 22 and the clamping projection 21 is thus clamped to the busbar section 2 by the clamping force of the clamping spring 3 with optimal surface pressure and reduced contact resistance. The clamping force of the clamping spring 3 is concentrated on the reduced area of the clamping projection 21, so that the force acting per unit area (surface pressure) is increased.

It is also clear that the contact section 9 is supported on the bottom section 7 on the opposite side. A fixation of position takes place in that an embossing 23 in the bottom section dips into the opening 16 of the contact section 9. This prevents the clamping spring 3 from slipping in the conductor insertion direction L. In addition, the clamping spring 3 rests with the contact section 9 and the clamping section 11 on the second side wall 5, so that an inclined position of the clamping spring 3 is prevented.

Furthermore, the inclined conductor guide plane 17 leading past an electrical conductor on the subsequent spring bow 10 in the front open end area of the conductor insertion channel 8 and the end stop 19 at the opposite end of the busbar section 12 can be seen. It is also clear that the spring bow 10 extends outwards (downwards in the figure) with respect to the inside of the base part 7 and is thus arranged in an area between the planar section of the base part 7 and the conductor guide plane 17.

Figure 4 shows a perspective view of the busbar section 2 without a clamping spring. The embossing 23 on the bottom section 7 becomes clear. This is designed as a part-circular elevation.

It can also be seen that the opening 12, viewed in the conductor insertion direction L, is delimited by an end edge 24 which is located above the overload stop bracket 15. In order to keep an electrical conductor out of the opening 12 and to prevent it from hitting this end edge 24, the conductor guide area 14 is designed in front of the end edge 24 as a section of the first side wall which is inclined to the second side wall 5.

The conductor guide area 14 is thus oriented away from the end edge 24 of the first side wall 4 which delimits the opening 12 and is opposite the conductor guide area 14.

Figure 5 leaves out a perspective view of the clamping spring 3 for the conductor connection contact element 1 Figures 1 to 3 recognize. It becomes clear that the clamping section 11 has a clamping edge 22 over the substantial part of its width, to which an actuating section with the laterally protruding actuating tab 13 is connected laterally. The actuating section with the actuating tab 13 is thus positioned next to the area of the clamping edge 22, ie on the side edge of the clamping section 11, as seen transversely to the direction of longitudinal extent of the clamping section 11.

Figure 6 shows a perspective view of a second exemplary embodiment of a conductor connection contact element 1. The conductor connection contact element 1 is in turn formed from a busbar piece 2 and a clamping spring 3. The clamping spring 3 is designed as a leaf spring extending from a base section 7 to the opposite cover section 6. This leaf spring rests with its contact section 9 on the base section 7 in the input-side section of the conductor guide area 14. An electrical conductor is inserted from this front side into the busbar section 2, which in turn is cage-shaped.

For this purpose, two opposing and spaced apart side walls 4 and 5 are again bent from a sheet metal part of the cover section 6, to which the bottom section 7, which extends transversely between the side wall sections 4 and 5 and is spaced apart from the cover section 6, adjoins.

It is clear that the contact leg 9 of the clamping spring 3 is clamped between the end edges of the two side walls 4 and 5 and the bottom section 7.

Seen in the conductor insertion direction L, conductor guide areas 34 are present at least on the first side wall 4 and, in the exemplary embodiment shown, on both side walls 4 and 5. These conductor guide areas 34 are as Material tongues which are oriented towards the respective opposite side wall 5, 4 and are formed into a clamping section or the freely movable end of the clamping section 11 of the clamping spring 3 and adjoin the respective side wall 4, 5 in a materially bonded manner. The material tongues are formed from the side wall 4 in that the end faces of the material tongues facing the base section 7 and the cover section 6 are exposed from the adjoining base section 7 and cover section 6, respectively.

It is also clear that the first side wall 4 again laterally has an opening 12 into which an actuating section 35 on the clamping section 11 of the clamping spring 3 protrudes. A clamping point formed between the clamping section 11 and the cover section 6 for clamping an electrical conductor can be opened in that an operating tool strikes the operating section 35 and an operating force is exerted in the direction of the bottom section 7 on the clamping section 11.

Figure 7 shows a side view of the conductor connection contact element 1. It becomes clear that the cover section 6 has a contact projection 37 in the area of the clamping edge 36 of the clamping spring 3 at the free end of the clamping section 11. This is formed by folding or embossing the otherwise flat cover section 6 in the direction of the bottom section 7. A clamping point for clamping an electrical conductor is thus formed between the contact projection 37 and the clamping edge 36.

It can also be seen that the material tongues 34 are integrally formed with the side wall 4 and are positioned obliquely inward into the conductor entry channel 8. They point to the clamping section 11 of the clamping spring 3. The side wall 4 is provided with an opening 12 in the area between the free end of the material tongue 34 and a rear (left in the figure) area, through which the clamping section 11 is accessible.

Figure 8 omits a side sectional view of the conductor connection contact element 1 Figure 7 recognize. From this it is again clear that a contact projection 37 is formed on the cover section 6 so as to protrude into the interior of the busbar section 2. The freely movable end of the clamping section 11 of the clamping spring 3 with its clamping edge 36 rests directly behind the clamping projection 37 in the illustrated idle state without a clamped-on electrical conductor. The position of the clamping projection 37 is aligned with the clamping edge 36 such that when an electrical conductor is clamped, the clamping force of the clamping spring 3 acting on the electrical conductor clamps the clamped electrical conductor on the clamping projection 37. The clamping force of the clamping spring 3 is thus concentrated on the clamping projection 37 and, if necessary, the electrical conductor is bent slightly behind the clamping projection 37 in order to bring about a form fit between the electrical conductor and the clamping edge 37.

It can also be seen that, viewed in the conductor insertion direction L, on the input side (ie on the right-hand side) that part of the second side wall 5 facing the bottom section 7 is placed in the interior of the busbar section 2 in order to rest on the contact section 9 of the clamping spring 3 and this on the busbar section 2 to clamp. In this regard, it is also on Figure 6 referenced. A fastening section 38, which is correspondingly set inwards, is also present on the first side wall 4.

It is also clear that the end of the busbar piece 2 has a material flap 19 bent down from the cover section 6 in the direction of the bottom section 7 to form an end stop. An electrical conductor introduced into the conductor entry channel 8 thus abuts this material flap 19 at the end and cannot be led out again to the outside.

Figure 9 leaves a perspective view of the clamping spring 3 for the second embodiment of the conductor connection contact element 1 of the Figures 6 to 8 recognize. It becomes clear that the contact section 9 has indentations 39 on its side edges. In these indentations 39 plunge into Figures 6 and 7 recognizable lugs 40 of the inwardly bent fastening section 38 in order in this way to fix the clamping spring 3 in its position on the busbar piece 2.

Furthermore, it becomes clear that at the freely movable end of the clamping section 11 of the clamping spring 3 there are the clamping edge in the central area and actuating tabs 35 protruding from the side edge on the two opposite sides to form actuating sections. These protrude as in Figure 6 recognizable into the lateral opening of the respective side wall 4 and 5 and are accessible from there for an operating tool.

It can also be seen that the clamping section 11, starting from the contact section 9, initially tapers conically in order to then merge again into a widening section with the laterally protruding actuating tabs 35.

Figure 10 shows a third embodiment of a conductor connection contact element 1, which in turn is formed from a busbar piece 2 and a clamping spring 3. The clamping spring 3 is designed as a U-shaped leg spring with a contact section 9, an adjoining spring bow 10 and a clamping section 11 adjoining the spring bow 10. The contact section 9 is supported on the bottom section 7 of the busbar section 2.

In this exemplary embodiment, too, the busbar piece 2 is designed in the shape of a cage in order to be connected to the cover and base sections lying opposite one another 6, 7 and the first and second side walls 4, 5 laterally connecting these cover and base sections 6, 7 to delimit a conductor entry channel 8.

From the first side wall 4, a material tongue 34, embodied in a materially bonded manner with the first side wall, is oriented towards the opposite second side wall 5 to form a conductor routing region in the interior of the conductor insertion channel 8. This material tongue 34, i.e. the conductor guide area, is located between the cover section 6 and the clamping section 11, so that the clamping spring is arranged between the material tongue 34 and the bottom section 7.

An electrical conductor introduced into the conductor entry channel 8 from the front (in the picture on the left) is guided to the clamping edge 41 of the clamping spring 3 with the aid of the material tongue 34. To the side of this clamping edge 41 there is an upwardly protruding actuating tab 42 which extends in the direction of the plane of the cover section 6 and is arranged laterally next to the side wall 4 and the cover section 6 in the idle state shown.

In turn, there is an opening 12 in the first side wall 4, through which the actuating section with the actuating tab 42 protrudes laterally. The opening 12 is designed in such a way that the clamping section 11 can be moved in the direction of the contact section 9 for opening a clamping point for an electrical conductor formed between the clamping edge 41 and the inner wall of the cover section 6.

The cover section 6 has, for example, a partially circular widened grip section 43 which provides a platform for a suction and gripping tool of an assembly robot and / or can be used as a solder connection area.

It is also clear that the two side walls 4, 5 have material flaps 44 facing one another in their end region in order to form an end stop. This provides a ladder collection pocket. In the area of these conductor catchment pockets there is no cover section 6, so that a viewing window is formed for checking the state of insertion of an inserted conductor.

Figure 11 shows a perspective side view of the conductor connection contact element 1 from Figure 10 from the opposite side with a view of the second side wall 5. It can be seen here that this side wall 5 has no opening and no conductor guide section that is placed in the conductor insertion opening 8.

It can also be seen that the cover section 6 and the bottom section 7 are materially connected to the second side wall 5 by folding or bending over.

In addition, as in Figure 10 also the inclined conductor guide planes are visible, which are bent from the two side walls 4, 5 and upstream of the spring arch 10. In this regard, reference is made to the first exemplary embodiment.

Figure 12 shows a side view of the conductor connection contact element 1 from FIG. 10 with a view of the first side wall 4. It becomes clear that this first side wall 4 has an opening 12 through which the actuating section of the clamping spring 3 passes. The actuating tab 42 projects beyond the opening to such an extent that it is positioned next to the first side wall 4 adjoining the opening 12.

Figure 13 omits a side sectional view through the conductor connection contact element 1 Figure 12 recognize. It becomes clear here that the bottom section 7 has a fixing opening 46 which adjoins the end of the contact section 9 of the clamping spring 3.

Figure 14 FIG. 11 shows a perspective sectional side view through the conductor connection contact element 1 from FIG Figure 10 . It can be seen that, as in the first exemplary embodiment, an inclined conductor guide plane 17 is formed in front of the spring bow 10. This is formed in one piece with the busbar element 2 as a material section bent from at least one side wall 4, 5.

The fixing of the position of the clamping spring 3 on the busbar piece 2 succeeds in this exemplary embodiment with a fixing section designed as a tab 45 on the contact section 9. This tab 45 dips into a fixing opening 46 in the bottom section 7. The contact section 9 otherwise lies exactly like the clamping section 11 on the inside of the second side wall 5 in order to prevent tilting or twisting.

Figure 15 leaves out a perspective view of the busbar section 2 of the conductor connection contact element 1 Figures 10 to 14 recognize. Here it becomes even more clear that the conductor guide plane 17 is formed from two material flaps which are each bent from the first and second side walls 4, 5 and positioned at an angle in the direction of the cover section 6.

At a distance behind this conductor guide plane 17, viewed in the conductor insertion direction L, is the base part 7. The material tongue 34, which forms a conductor guide area and is inclined to the second side wall 5, is arranged between the base part 7 and the cover part 6.

Figure 16 leaves a perspective view of the clamping spring 3 of the third embodiment of FIG Figures 10 and 11 a conductor connection contact element 1 recognize. It becomes clear here that the tab forming the fixing section 45 is bent off adjacent to a side edge of the contact section 9. This tab 45 is thus located below the clamping edge 41 of the clamping section 11 of the clamping spring 3. In this exemplary embodiment, the tab 45 is not arranged in a more central area of the contact section 9. However, this is also possible as an option.

It is also clear that the actuating tab 42 is positioned next to the clamping edge 41, seen transversely to the direction of longitudinal extent of the clamping section 11, and protrudes beyond the end region formed by the free end region of the clamping edge 41. The actuation area is thus shifted upwards, i.e. in the direction of the cover section 6 and away from the base section 7.

Figure 17 FIG. 14 shows a perspective view of a fourth embodiment of a conductor connection contact element 1. This is a variant of the first embodiment that has been modified in detail, so that essentially the description of FIG Figures 1 to 5 can be referenced.

The alternative already mentioned is implemented in this case that a conductor guide plane 17 protrudes from the side wall 4 to the opposite side wall 5.

In this embodiment, the end stop 19 is bent over from the second side wall 5 in the direction of the first side wall 4 and in this transverse section has a guide surface 47 protruding towards the bottom section 7.

The overload stop bracket 15 present in the first embodiment is not present in this embodiment. The lower edge 48 of the first side wall 4 delimiting the opening 12 provides an overload stop at a suitable height.

It is also clear that the first side wall 4 provides a support surface 49 in the area adjacent to the conductor routing area 14 and between the conductor routing area 14 and the conductor routing plane 17, on which the clamping spring 3 rests in the illustrated idle state to stabilize its position. In the variant shown, the clamping section 11 of the clamping spring 3 rests shortly behind the spring arch 10 on the support surface 49 designed as an arch of the side wall 4.

Figure 18 shows a side view of the conductor connection contact element 1 from FIG. Here it becomes clear once again that the support surface 49 is designed as an area directly adjoining the conductor routing area 14, which merges into a subsequent bay formed by an arc-like contour up to the conductor routing plane 17.

the end Figures 17 and 18 it is also clear that the actuating tab 13 extends further away in the direction of the cover section 6 and is curved back slightly downwards in the direction of the bottom section 7. The actuating tab 13 is then arranged with part of its length next to the side wall 4 and thus extends beyond the opening 12. The actuating tab 13 is thus significantly lengthened compared to the first embodiment.

It is also clear that a receiving mandrel 50 protrudes from the second side wall 5 in the direction of the opening 12 or the plane of the first side wall 4. This receiving mandrel 50 is arranged adjacent to the spring bow 10 of the clamping spring 3, so that the receiving mandrel 50 is positioned between the clamping section 11 and the contact section 9 in the area of the spring bow or the spring root.

Figure 19 omits a side sectional view of the conductor connection contact element 1 Figure 18 recognize. Here the mandrel 50 is again clearer, the is positioned in the spring arch 10 between the adjoining clamping section 11 and the contact section 9.

The conductor receiving pocket with the end stop 19 and the guide section 47, which is directed opposite to the conductor insertion direction L in the direction of the base section 7, can also be seen.

It is also clear that the freely movable end of the clamping section 11, on which the clamping edge 22 is formed, is slightly bent in the direction of the cover section 6, so that the clamping section 11, starting from the spring arch 10, after a first bend at a first acute angle towards the cover section 6 is aligned and is aligned in its end region with a second acute angle to the cover section 6. The second acute angle is larger than the first acute angle.

Figure 20 shows a perspective view of the busbar section 2. Here you can essentially refer to the explanations Figure 4 to get expelled. It becomes clear that on the first side wall 4 there is a marginal edge 48, the opening 12 opposite to the conductor insertion area 14, which limits the opening 12 towards the base section 7. It can be used as an overload stop.

It can also be seen that the bottom section 7 is formed in partial areas from sheet metal sections folded down from the second side wall 5 and, on the other hand, from sheet metal sections folded down from the first side wall 4, which adjoin one another.

Figure 21 leaves out a perspective view of the clamping spring 3 for the conductor connection contact element 1 Figures 17 to 19 recognize. Here it becomes clear again that the actuating tab 13 is arranged on the clamping section 1 laterally next to the clamping edge 22. The actuating tab 13 is of the clamping edge 22 is exposed and bent again slightly downwards with a curved contour in the direction of the plane of the contact section 7.

Claims (16)

Conductor connection contact element (1) for clamping an electrical conductor to a busbar piece (2), which consists of a sheet metal part with a first side wall (4) and the first side wall (4) opposite second side wall (5), one from the first side wall (4) to the opposite second side wall (5) extending bottom section (7) and the bottom section (7) opposite and from the first side wall (4) to the opposite second side wall (5) extending cover section (6) is formed, wherein the side walls (4, 5) with the base section (7) and the cover section (6) delimit a conductor entry channel (8), and with a clamping spring (3) arranged on the busbar section (2), which has a contact section (9) at a first end region and a contact section (9) at the second End area, which is opposite to the first end area, has a clamping section (11) with a clamping edge (22, 36, 41) for clamping the electrical conductor, wherein the contact section itt (9) is arranged on the bottom section (7) of the busbar section (2), and wherein the clamping section (11) extends with its freely movable end towards the cover section (6),
characterized in that, viewed transversely to the conductor insertion direction (L) of the clamping section (11) in the direction of the side wall (4) next to the clamping edge (22, 36, 41) there is an actuating section accessible to an actuating tool, and that an actuating section connected to the clamping section (11 ) adjoining conductor guide area (14, 34) is formed on the first side wall (4), the conductor guide area (14, 34) being angled in Direction of the opposite second side wall (5) is aligned portion of the first side wall (4). Conductor connection contact element (1) according to Claim 1, characterized in that the actuating section is designed as an actuating tab (13, 35) protruding laterally from the clamping section (11) of the clamping spring and as an actuating tab (13, 35) protruding laterally from the first side wall (4). Conductor connection contact element (1) according to claim 1 or 2, characterized in that the first side wall (4) has an opening (12) for the actuation tab (13, 35, 42) to pass through, and that the conductor guide area (14, 34) is separated from the the opening (12) delimiting the end edge (24) of the first side wall (4), which is opposite the conductor guide region (14, 34), is oriented facing away. Conductor connection contact element (1) according to claim 1, characterized in that the conductor routing area (14, 34) is designed as a material tongue (34) of the first side wall (4) directed obliquely in the direction of the second side wall (5) and towards the clamping section (11) is. Conductor connection contact element (1) according to one of Claims 1 to 4, characterized in that the actuating section has an actuating tab (42) extending in the direction of the plane of the cover section (6). Conductor connection contact element (1) according to Claim 1 or 4, characterized in that the actuating section has a laterally behind the exposed end of the material tongue (34) in an externally accessible opening (12) in the first side wall (4), seen in the conductor insertion direction (L) ) arranged actuating tab (13, 35). Conductor connection contact element (1) according to one of the preceding claims, characterized in that at the rear end of the busbar piece (2), which is opposite the conductor entry channel (8), an end stop by one of a side wall (4, 5), of the bottom section (7 ) or from the cover section (6) bent material flaps (19, 44) is formed. Conductor connection contact element (1) according to Claim 7, characterized in that material flaps (19, 44) which are directed towards one another and form the end stop are bent from the side walls (4, 5). Conductor connection contact element (1) according to one of the preceding claims, characterized in that the contact section (9) is clamped between the side walls (4, 5) and the bottom section (7). Conductor connection contact element (1) according to one of claims 1 to 8, characterized in that the contact section (9) with a fixing section protruding from the contact section (9) into an opening (46) of the base section (7) or with a fixing section protruding from the base section (7) ) is fixed in position on the busbar piece (2) in an opening (19) of the contact section (9) protruding fixing section. Conductor connection contact element (1) according to Claim 10, characterized in that the fixing section is a tab (45) or an embossing (23). Conductor connection contact element (1) according to one of the preceding claims, characterized in that the clamping spring (3) has a spring bow (10) connecting the contact section (9) to the clamping section (11), and that of at least one side wall (4, 5) in conductor insertion direction (L) is bent in the direction of the opposite side wall (4, 5) in front of the spring arch (10) arranged conductor guide plane (17), the conductor guide plane (17) being oriented obliquely in the conductor insertion direction (L) towards the cover section (6). Conductor connection contact element (1) according to one of the preceding claims, characterized in that the cover section (6) or the bottom section (7) has a solder connection area (18a, 18b). Conductor connection contact element (1) according to one of the preceding claims, characterized in that from a side wall (4, 5) protrudes in the direction of the opposite side wall (5, 4) extending overload stop bracket (15) which is located in the space between the clamping section (11) and the bottom portion (7) is positioned. Conductor connection contact element (1) for clamping an electrical conductor with a busbar piece (2), which consists of a sheet metal part with a first side wall (4) and a second side wall (5) opposite the first side wall (4), one from the first side wall (4 ) to the opposite second side wall (5) extending bottom section (7) and the bottom section (7) opposite and from the first side wall (4) to the opposite second side wall (5) extending cover section (6) is formed, wherein the side walls (4 , 5) with the base section (7) and the cover section (6) delimit a conductor entry channel (8), and with a clamping spring (3) arranged on the busbar section (2) which has a contact section (9) at a first end region and a contact section (9) at the the second end region, which is opposite the first end region, has a clamping section (11) with a clamping edge (22, 36, 41) for clamping the electrical conductor, the system section (9) is arranged on the bottom section (7) of the busbar piece (2), and wherein the clamping section (11) with extends its freely movable end towards the cover section (6), characterized in that the clamping spring (3) has an actuating section and that the actuating section is arranged as a laterally on the clamping section (11) of the clamping spring (3) and laterally protruding from the first side wall (4 ) protruding actuating tab (13, 35) is formed. Conductor connection contact element (1) according to claim 15, characterized in that the first side wall (4) has an opening (12) for the actuation tab (13, 35, 42) to pass through, and that a conductor guide region (14, 34) from which the opening (12) delimiting the end edge (24) of the first side wall (4), which lies opposite the conductor guide region (14, 34), is oriented facing away.

Images