EP3595091B1 - Conductor terminal and set of conductor terminal and actuator - Google Patents

Description

The invention relates to a conductor connection terminal according to the preamble of claim 1.

The invention also relates to a set comprising such a conductor connection terminal and an operating tool.

From the DE 10 2010 014 144 B4 an electrical connection terminal for surface soldering on a printed circuit board is known.

From the US-2013/0029529 A1 an electrical connector with a connection contact designed for direct insertion of an electrical conductor is known.

From the WO 2015/131215 A1 a connecting or connecting terminal is known.

WO 2013/176859 A1 discloses an SMD circuit board terminal according to the preamble of claim 1 with actuating slides protruding from the top of the insulating material housing for opening a clamping point formed on the respective spring-loaded terminal connection for clamping an electrical conductor;

KR 10 2014 0122904 A describes a similar SMD PCB terminal with a spring-loaded terminal connection with two leaf springs pointing towards one another, which have actuating tabs pointing in the direction of insertion of the conductor, and an insulating material housing with an actuating slide inserted into an opening in the top and back.

Based on this, the object of the present invention is to create an improved conductor connection terminal.

The object is achieved with the conductor connection terminal with the features of claim 1 and with the set comprising such a conductor connection terminal and operating tool with the features of claim 17.

Advantageous embodiments are described in the subclaims. The conductor connection terminal is designed in such a way that the solder connection contact tongues are bent out of the plane of the base section, span a solder connection plane offset from the plane of the base section and form an indented area of the base section, the solder connection contact tongues each being connected to the base section via a connecting web and wherein the indented area is designed as a free space for a locking cover to snap into place. In this case, latching lugs are formed on the connecting webs, which form a stop for a latching contour of the closure cover.

First of all, by bending the solder connection contact tongues out of the plane of the base section so that they span a solder connection plane offset from the plane of the base section, the overall height of an electrical circuit board provided with the conductor connection terminal is reduced. In this way, the conductor connection terminals can be hooked into an opening in the circuit board and soldered to the rear of the circuit board. The conductor connection terminal is therefore not simply placed on a circuit board and soldered to solder connection contacts on the top. As a result of this plane offset, an indented area of the contact body is also formed, into which a closure cover can be locked. This sealing cover provides a suction surface for an automatic assembly machine for handling the conductor connection terminal. In addition this avoids the formation of a light trap or dark spots if there are light-emitting elements (eg light-emitting diodes LEDs) on the side of the solder connection contacts on the circuit board. Depending on the arrangement of such luminous elements and the formation of a scattered shard, the depressions within the conductor connection terminal can be perceived as "dark spots" by a scattered shard. With a closure cover, the perceptibility of the conductor connection terminal arranged adjacent to the lighting elements is reduced.

The closure cover forms a separate part for the insulating material housing, which is connected to the contact body and also unfolds its function without the insulating material housing.

The closure cover can have latching lugs which are adapted to latch into latching openings in the contact body. However, it is also conceivable that the closure cover has latching openings or latching edges which are adapted to latch with the latching lugs on the connecting webs that connect the bottom section to the solder connection contact tongues.

This latching of the closure cover to the contact body avoids latching openings on the insulating material housing, which could reduce the air and creepage distances.

The closure cover can have fingers protruding vertically from a cover plate of the closure cover. A pair of such fingers is then arranged opposite one another at a distance from one another and adapted to be immersed in the indented area for contact in each case adjacent to a connecting web of the contact body leading from the bottom section to a solder connection contact tongue. In this way, the closure cover is locked with a pair of such opposing fingers on opposing connecting webs with detent elements of a pair of such fingers pointing away from one another. While the cover plate remains above the level spanned by the solder connection contact blades, the fingers dip into the indented area of the contact body.

The fingers can each have a recess with a locking edge. The troughs are then each designed to receive a latching lug of the contact body. Such a latching lug can protrude from a connecting web, for example. The locking edge is formed by a boundary wall of the trough.

With such a depression in a finger, the stability and rigidity of the finger can be improved. The side walls that delimit the trough increase the finger's resistance to elastic deformation when a force is applied and when it is subjected to bending.

However, the fingers can also each have a latching nose which is designed to latch into a latching opening of an adjoining connecting web of the contact body.

Cover tongues of the cover plate can protrude on the plane of the cover plate between two fingers of the closure cover that are arranged next to one another. The cover tongues can be exposed by slots from the sections of the cover plate that merge into the fingers. The air and creepage distances are improved by the slots, especially when the insulating housing is immersed in these slots.

The cover section of the insulating material housing opposite the base section can be completely closed on the side of the spring-force terminal connection facing away from the base section towards the top in the area adjoining the side wall sections and the at least one leaf spring tongue of the contact body. The insulating material housing can have an actuation opening on the rear side, which is opposite the conductor entry opening, which leads to the actuation tabs of the at least one leaf spring tongue. The actuation opening is delimited by the cover section of the insulating material housing, forming a guide channel.

The cover section, which adjoins the at least one actuating tab above the spring of the spring-loaded terminal connection, thus represents a guide wall of a guide channel on which an actuating tool or an actuating tool inserted into the actuating opening or an actuating element that is slidably installed in the actuating opening is guided. The actuation then takes place exclusively via the actuation opening accessible from the rear, so that the actuation forces only act as shear forces on solder contacts of the conductor connection terminal.

Because the cover section is closed adjacent to the spring-cage terminal connection on the side of the spring-cage terminal connection facing away from the bottom section, the at least one leaf spring tongue can only be opened by an actuation force directed opposite to the conductor insertion direction from the rear actuation opening in the direction of the conductor insertion opening on the front side. A force component which acts from the cover section to the bottom section is avoided, so that the forces acting on the soldered points of the conductor connection terminal do not impair these soldered points.

The guide channel of the actuation opening can be formed not only by the cover section, but also by spaced-apart lateral inner wall sections of the insulating material housing and a base section opposite the cover section. The guide channel is thus delimited on one side, on both sides or possibly on all sides or circumferentially by wall sections. A separate operating tool is thus optimally guided to the at least one operating tab. Optionally, however, an actuating element can also be installed in such a guide channel, which is then mounted such that it can be moved in the actuating direction from the front to the rear.

The base section, which delimits the guide channel in the direction of the base section, can be spaced apart from the base section of the spring-loaded terminal connection to form a conductor receiving pocket. In this way, on the one hand, there is a conductor collecting pocket between the base section and the base section provided in the conductor insertion direction behind the clamping point formed by the clamping edge of the at least one leaf spring tongue for clamping an electrical conductor. In addition, the conductor insertion area or conductor receiving area is delimited by the base section through the actuation plane located above it, into which the respective actuation tab of the at least one leaf spring protrudes. This prevents the actuation opening from being blocked by strands of an electrical conductor.

The guide channel can end directly in front of the at least one actuating tab, so that the guide channel is formed by the actuating opening and then merges into the actuating tab of the leaf spring and the cover section located above it. In the case of two leaf springs aligned facing one another, the actuation opening is thus continued through the cover section and the two actuation tabs which are spaced apart from one another. In the cover section of the insulating material housing, an indentation can be provided in the rear area opposite the conductor insertion opening. This indentation then merges into the actuation opening leading to the actuation tabs. This indentation has the advantage that it provides a positioning area into which an operating tool is inserted from above, at an angle from the rear or directly from the rear. The operating tool is then positioned by the lateral boundary walls of the indentation and the bottom of the indentation in such a way that it can be inserted into the actuating opening adjoining the indentation.

The bottom section can have solder connection contacts protruding from the contour of the insulating material housing. These are then intended for soldering onto a circuit board and can be SMD contacts for surface soldering assembly or pin contacts for through hole soldering assembly.

The actuation opening can be provided for receiving a separate actuation tool. However, it is also conceivable that the actuation opening extends through the insulating material housing from the rear to the front extends and opens out on the front side adjacent to the conductor insertion opening. This means that actuation from the front and / or testing of the voltage potential at the spring-loaded terminal connection on the front can also take place. In this embodiment it is particularly advantageous if an actuating element is slidably received in the actuating opening. The actuating element can have a protruding actuating section which is designed to apply force to the at least one actuating tab to open the clamping point formed by the clamping edges. This protruding actuating section is then located in the interior of the insulating material housing in the area of the actuating tab of the leaf spring tongue.

The actuating element can have a head section accessible from the rear of the insulating material housing for applying force and a signal section protruding from the front side of the insulating material housing when the spring-loaded terminal connection is open. With the help of this signal segment, it is possible to see whether the clamping point formed on the clamping edge of the leaf spring tongue is open or not. In addition, the actuating element can be pushed back into the rest position by applying force to the signal section towards the rear, in which the leaf spring tongue is not impaired by the actuating element and exerts a resilient clamping force on an inserted electrical conductor to be clamped.

For the purposes of the present invention, the indefinite term “a” is not to be understood as a numerical word. If, for example, a spring-loaded terminal connection, a leaf spring or a conductor entry opening or actuation opening is mentioned, this is to be interpreted in the sense of "at least one".

The insulating material housing can thus also have several conductor entry openings arranged next to one another. The conductor connection terminal can have a plurality of spring-loaded terminal connections which are accommodated next to one another in the insulating material housing and are assigned to a respective conductor insertion opening and an actuating opening.

The invention is further achieved by the set of conductor connection terminal and operating tool, the operating tool having a holding section and an operating finger designed for insertion into the operating opening and for pushing apart the operating tabs of the clamping point. In this embodiment, a separate actuating tool is provided, which can be inserted with its at least one actuating finger into an associated actuating opening of the insulating housing from the rear, in order then to be guided between the actuating tabs by moving the actuating finger towards the front of the insulating housing in order to push them apart .

The holding section and the actuating finger are preferably at an angle to one another. This angle can preferably be in the range of approximately 90 degrees +/- 20 degrees. The holding section and the at least one actuation bracket are particularly preferably arranged at right angles to one another.

A plurality of actuating fingers, arranged next to one another and spaced apart from one another, can be provided on the holding section for insertion into an associated actuating opening of a plurality of actuating openings of the insulating material housing of the conductor connection terminal. This makes it possible to open several terminal points of a multi-pole conductor connection terminal at the same time, which simplifies handling.

Figur 1

- Perspektivische Ansicht einer ersten, nicht erfindungsgemäßen Ausführungsform einer Leiteranschlussklemme;

Figur 2

- Perspektivische Ansicht des prinzipiellen Aufbaus des Federkraftklemmanschlusses für die Leiteranschlussklemme aus Figur 1;

Figur 3

- Seiten-Schnittansicht der Leiteranschlussklemme aus Figur 1 mit zusätzlichem Betätigungswerkzeug;

Figur 4

- Perspektivische Rückseitenansicht der Leiteranschlussklemme aus Figur 1;

Figur 5

- Perspektivische Ansicht der in eine Leiterplatte eingesetzten nicht erfindungsgemäßen Leiteranschlussklemme mit separaten Betätigungswerkzeug;

Figur 6

- Perspektivische Ansicht der Leiteranschlussklemme aus Figur 5 ohne Isolierstoffgehäuse;

Figur 7

- Perspektivische Ansicht der Leiteranschlussklemme aus Figur 6 mit zwischen Betätigungslaschen des Federkraftklemmanschlusses eingeführten Betätigungswerkzeuges;

Figur 8

- Perspektivische Ansicht der Leiteranschlussklemme aus Figur 1 schräg von der Rückseite und von unten;

Figur 9

- Perspektivische Rückseitenansicht der in eine Leiterplatte eingesetzten und angelöteten nicht erfindungsgemäßen Leiteranschlussklemme;

Figur 10

- Seiten-Schnittansicht durch eine zweite, erfindungsgemäße Ausführungsform einer Leiteranschlussklemme mit Verschlussdeckel;

Figur 11

- Perspektivische Ansicht des prinzipiellen Aufbaus der Federkraftklemmanschlusses für die Leiteranschlussklemme aus Figur 10;

Figur 13

- Perspektivische Ansicht auf die Unterseite des Isolierstoffgehäuses der Leiteranschlussklemme aus Figur 10;

Figur 14

- Perspektivische Ansicht auf die Unterseite der Leiteranschlussklemme aus Figur 10 mit Verschlussdeckel;

Figur 15

- Perspektivische Rückseitenansicht der Leiteranschlussklemme aus Figur 14 mit Blick auf die Oberseite;

Figur 16

- Perspektivische Frontseitenansicht der Leiteranschlussklemme aus Figur 15;

Figur 17

- Seiten-Schnittansicht der Leiteranschlussklemme aus Figur 10 bis 16 mit zusätzlichem Betätigungswerkzeug;

Figur 18

- Perspektivische Ansicht einer zwei-poligen Leiteranschlussklemme entsprechend der zweiten Ausführungsform gemäß Figur 10;

Figur 19

- Perspektivische Rückansicht einer ein-poligen Leiteranschlussklemme der zweiten Ausführungsform gemäß Figur 10.

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, not according to the invention, of a conductor connection terminal;

Figure 2

- Perspective view of the basic structure of the spring-loaded terminal connection for the conductor connection terminal from Figure 1;

Figure 3

- Side sectional view of the conductor connection terminal Figure 1 with additional operating tool;

Figure 4

- Perspective rear view of the conductor connection terminal Figure 1 ;

Figure 5

- Perspective view of the conductor connection terminal not according to the invention inserted into a printed circuit board with a separate operating tool;

Figure 6

- Perspective view of the conductor connection terminal Figure 5 without insulating housing;

Figure 7

- Perspective view of the conductor connection terminal Figure 6 with an operating tool inserted between the operating tabs of the spring-loaded terminal connection;

Figure 8

- Perspective view of the conductor connection terminal Figure 1 obliquely from the back and from below;

Figure 9

- Perspective rear view of the conductor connection terminal not according to the invention inserted into a circuit board and soldered on;

Figure 10

- Side sectional view through a second embodiment according to the invention of a conductor connection terminal with a sealing cover;

Figure 11

- Perspective view of the basic structure of the spring-loaded terminal connection for the conductor connection terminal from FIG. 10;

Figure 13

- Perspective view of the underside of the insulating material housing of the conductor connection terminal Figure 10 ;

Figure 14

- Perspective view of the underside of the conductor connection terminal Figure 10 with sealing cover;

Figure 15

- Perspective rear view of the conductor connection terminal Figure 14 facing the top;

Figure 16

- Perspective front view of the conductor connection terminal Figure 15 ;

Figure 17

- Side sectional view of the conductor connection terminal Figures 10 to 16 with additional operating tool;

Figure 18

- Perspective view of a two-pole conductor connection terminal according to the second embodiment according to FIG Figure 10 ;

Figure 19

- Perspective rear view of a single-pole conductor connection terminal according to the second embodiment Figure 10 .

Figure 1 shows a perspective view of a first embodiment of a conductor connection terminal 1, which has an insulating material housing 2 and a number of spring-loaded terminal connections 3 built into the insulating material housing 2. Of the spring-loaded terminal connections 3, solder connection contacts 4 protruding from the insulating material housing 2 are visible on the front and rear.

It is clear that the insulating material housing 2 has conductor entry openings 5 on the front side for inserting an electrical conductor to a terminal point, which is formed on the respective spring-loaded terminal connection in the space of the insulating material housing 2.

In the area of the rear side of the insulating material housing 2, which is opposite the front side with the conductor entry opening 5, indentations 6 are present in the insulating material housing 2. These indentations 6 merge into actuation openings on the rear side, which lead into the interior of the insulating material housing 2.

It is also clear that on the front side in front of the conductor entry openings 5 there is in each case a base base 7a configured as part of the insulating material housing 2 and on the rear side in front of the indentations 6 there is also a base base 7b configured as part of the insulating material housing 2. This serves as a support on a circuit board when the conductor connection terminal 1 is inserted into an opening in a circuit board and is soldered to the solder connection contacts 4 on the rear side of the circuit board.

Figure 2 shows a perspective view of the basic structure of a spring-loaded terminal connection 3 for the circuit board. It becomes clear that the spring-loaded terminal connection 3 is formed in one piece from a sheet metal element as a stamped and bent part. A bottom section 8 is provided, from which two side wall sections 9 which are spaced apart from one another protrude. A conductor receiving channel for receiving an electrical conductor is formed by the side wall sections 9 and the bottom section 8. The conductor receiving channel can at least partially be closed at least partially by limiting tabs 10 on the side opposite the bottom section 8, which are bent over by the side wall sections facing one another. The top of the conductor receiving channel can, however, also be closed by sections of the insulating material housing 2.

It can be seen that in the illustrated embodiment, two leaf spring tongues 11 protrude from the side wall sections 9 in the conductor insertion direction L. The leaf spring tongues 11 extend approximately parallel to the base section 8 and run towards one another. At the ends of the leaf spring tongues 11 are clamping edges 12 for clamping an electrical Formed conductor or its stripped end. Alternatively, an embodiment with only one leaf spring tongue 11 is also conceivable, which forms a clamping point with a side wall section 9 or a tab protruding therefrom, for example.

It is also clear that actuating tabs 13 protrude from the leaf spring tongues 11 on the upper edges that are opposite the bottom section 8. These actuating tabs 13 are pointed away from one another at an angle and are provided for receiving an actuating tool or actuating element. They extend with their free end in the conductor insertion direction L or in the extension direction of the leaf spring tongues 11 and widen in the shape of a funnel towards their free end. With the help of such an actuating tool or actuating element inserted between the actuating tabs 13, the leaf springs 11 are moved away from one another in order to open the clamping point formed on the clamping edges 12 and to be able to remove a clamped electrical conductor.

It is also clear that the plane of the bottom section 8 in the area of the side wall sections 9 and the leaf spring tongues 11 is raised or offset relative to the plane of the soldering connection contacts 4 in order to create an indentation or a free space on the underside of the spring force terminal connection opposite the leaf spring tongues 11 3 to form. The conductor insertion plane formed by the conductor insertion channel for inserting an electrical conductor is thus arranged relatively far offset from the solder connection plane defined by the solder connection contacts 4. The depth of the indentation or the free space should at least correspond to the thickness of a conventional printed circuit board, so that the solder connection plane lies on the underside of the printed circuit board and the conductor insertion plane lies above the upper side of the printed circuit board.

Figure 3 omits a sectional side view of the conductor connection terminal 1 Figure 1 recognize. It becomes clear that the solder connection contacts 4 are soldered to the rear side of a circuit board 14 when the conductor connection terminal 1 is inserted into an opening 15 in the circuit board 14. The base sockets 7a, 7b of the insulating housing 2 are supported on the underside of the circuit board 14.

The spring-loaded terminal connections 3 are fixed in position on the insulating material housing 2 in that projections 16 of the insulating material housing 2 protrude through associated bearing openings 17 of the base section 8.

It becomes clear that the plane of the base section 8 in the interior of the insulating material housing 2 is offset towards the cover section 18 of the insulating material housing 2 in comparison to the plane formed by the solder connection contacts 4. The solder connection contacts 4 are thus drawn further down in order to enable rear-side mounting on the printed circuit board 14.

It is clear that the cover section 18 is completely closed above the spring-loaded terminal connection 3 in the area of the leaf springs 11 and in particular the actuating tabs 13. The cover section 18 continues to the rear of the insulating material housing 2, which is opposite the conductor insertion opening 5, so as to delimit an actuation opening 19 for inserting an actuation tool 20. Opposite to the cover section 18, the actuation opening 19 is delimited by a base section 21. This base section 21 is arranged at a distance from the bottom section 8 of the spring-loaded terminal connection 3 in order to delimit a conductor collecting pocket 22. An electrical conductor guided past the leaf springs 11 by the conductor insertion opening 5 is thus guided with its stripped free end through the base section 8 and the base section 21 located above it into the conductor collecting pocket 22. The free space of the actuating opening 19 lying above the base section 21 is thus kept free of any strands of an inserted and clamped electrical conductor.

It is also clear that the actuating tabs 13 protrude in the conductor insertion direction L from the terminal end 12 further in the direction of the base section 21. If an actuating finger 24 protruding from a holding section 23 of the actuating tool 20 is inserted into the actuating opening 19, it acts on the actuating tabs 13 located opposite one another and pushes them apart on an actuating plane. This operating level is above the conductor terminal level, which is through the clamping edges 12 and the adjoining conductor collecting pocket is formed and which is bounded by the base section 21 towards the actuating opening 19 at the top.

The clamping point of the spring-loaded terminal connection 3 is thus opened by an actuating force which acts in the direction of arrow B opposite to the conductor insertion direction L. The actuation force B exerts a shear force on the solder connection contacts 4 at most. An actuating force acting transversely to the surface of the printed circuit board 14, which could impair the soldering points on the solder connection contacts 4, is avoided.

It can also be seen that a housing part in the form of a closure cover 40 is latched into the indented area of the base section 8 from the underside. Here, too, projections in the form of latching lugs 56 snap into latching openings in the sheet metal material of the bottom section 8. With this closure cover 40, a suction surface is provided for an automatic assembly machine for handling the conductor connection terminal 1. In addition, it is avoided that a light trap or dark spots form if there are light elements (e.g. light-emitting diodes LEDs) attached to the side of the solder connection contacts 4 on the circuit board 14. Depending on the arrangement of such luminous elements and the formation of a diffuser, the depressions within the conductor connection terminal 1 can be perceived as "dark spots" through a diffuser.

The sealing cap 40 is optional. Without such a closure cover 40, under certain circumstances the base section 8 itself can also be used as a suction surface for an automatic assembly machine.

Figure 4 omits a perspective rear view of the conductor connection terminal 1 Figures 1 and 3 recognize. It is clear that the indentations 6 are each delimited by the base section 21 as the bottom surface and mutually opposite inner wall surfaces 25 of the insulating material housing 2. Hit the help of these indentations is the introduction of the operating tool 21 in the The actuation indentation 19 is facilitated by the indentation 6 providing a funnel-shaped insertion area.

Figure 5 shows a perspective view of the conductor connection terminal 1 inserted into a circuit board 14. It becomes clear that the circuit board 14 has a rectangular opening into which the conductor connection terminal 1 is inserted from the underside. The conductor entry opening 5 opens out at the level of the top of the circuit board 14 or possibly slightly above it. Such an installation makes it possible to reduce the overall height of an electrical device compared to simply soldering a simple conductor connection terminal 1 onto the top of the circuit board 14.

Figure 6 shows a perspective view of the conductor connection terminal 1 from FIG. 5 without an insulating housing 2. The position of the multiple spring-loaded terminal connections 3 arranged next to one another in the receiving opening 15 of the circuit board 14 is visible. It becomes clear that actuating tabs 13 protrude from the leaf springs 11 on the top side, which is opposite the bottom section 8. These extend from the end regions of the leaf spring tongues 11 with the clamping edges 12 beyond the clamping edges 12. A pair of such actuation tabs 13 of a spring-loaded terminal connection 3 is bent away with their free ends pointing away from one another in order to form an insertion funnel for the actuation finger 24 of an actuation tool 20.

In the rest position shown, the clamping edges 12 of the leaf springs 11 of a spring-loaded terminal connection 3 are directed towards one another by the spring force of the leaf springs 11. The clamping edges 12 can then rest against one another without a clamped-on electrical conductor. If an electrical conductor is now led past the side walls 9 and the leaf springs 11 to the clamping edges 12, then this is clamped to the spring-loaded terminal connection 3 by the clamping force of the leaf springs.

Figure 7 leaves the arrangement on Figure 6 with printed circuit board 14 and spring-loaded terminal connections 3 inserted therein into a receiving opening. The actuation tool 20 is now inserted into the front, right-hand spring-loaded terminal connection in such a way that the actuation finger 24 is placed between the actuation tabs 13. As a result, the two opposing leaf springs 11 of the spring-loaded terminal connection 3 are moved away from one another in order to open the clamping point formed on the opposing clamping edges 12 for clamping an electrical conductor. It is clear that the actuating finger 24 lies on a plane above the clamping plane formed by the leaf springs 11 for clamping an electrical conductor. It is also clear that the actuating finger 24 is moved in a direction which essentially corresponds to the direction in which the leaf springs 11 extend and is approximately parallel to the surface of the printed circuit board 14.

Figure 8 shows a perspective rear view of the conductor connection terminal 1. Here it becomes clear once again that the insulating material housing 2 is fixed in position with projections 16 in bearing openings 17 of the base section 8 of a spring-loaded terminal connection 3. It can also be seen that the solder connection contacts 4 are bent around onto the support plane of the base sockets 7a, 7b of the insulating material housing 2.

Figure 9 omits a view of the conductor connection terminal 1 Figure 8 recognize in the assembled state, in which the conductor connection terminal 1 is inserted from the rear into a receiving opening 15 of the circuit board 14. It becomes clear that the solder connection contacts 4 now rest on the surface of the rear side of the circuit board 14 in order to be soldered to the circuit board 14 there by means of surface soldering.

Because the actuation opening necessarily reduces the actuation force to an actuation force acting approximately parallel to the surface of the circuit board 14, the solder connection contacts 4 or the soldered connections there with the circuit board 14 are only subjected to shear forces.

Here, too, the closure cover 40 can be seen, which closes the indented sections of the base section 8.

Figure 10 shows a side sectional view through a second embodiment of a conductor connection terminal 1 in a state inserted into a circuit board 14. As in the first exemplary embodiment, the spring-loaded terminal connection 3 of the conductor connection terminal 1 has a contact body formed from a sheet metal element with a base section 8, side wall sections 9 protruding from the base section 8 and spaced apart from one another, and solder connection contact tongues 4. The solder connection contact tongues 4 are out of the plane of the base section 8, to which the leaf spring tongues 11 adjoin, are bent out and span a solder connection plane arranged offset to the plane of the base section 8. It becomes clear that the conductor connection terminal 1 is again inserted into an opening in the circuit board 14 so that the solder connection plane with the solder connection contact tongues 4 is on the side of the circuit board 14 that is opposite the conductor entry side with the conductor entry opening 5.

This offset in planes creates a free space for a locking cover 40 to snap into place.

In contrast to the first embodiment, the closure cover 40 has fingers 42a, 42b protruding vertically from the cover plate 41 of the closure cover. Such a pair of such fingers 42a, 42b arranged opposite one another at a distance from one another. These fingers 42a, 42b are adapted to the spring-force terminal connection 3 in such a way that they dip into the indented area of the spring-force terminal connection 3 and rest on the connecting webs 50 which connect the base section 8 to the contact tongues 4. The connecting webs 50 delimit the indented area and are oriented transversely to the plane of the base section 8 and the plane spanned by the solder connection contact tongues 4.

It can be seen that latching lugs 57 are formed on the connecting webs 50 which, together with a latching contour of the respectively adjoining finger 42a, 42b, form a stop for latching the closure cover 40 on the spring-loaded terminal connection 30. In the exemplary embodiment shown, the latching lugs 57 are formed from the sheet metal material of the spring-loaded terminal connection 3. For this purpose, material flaps are cut free from the sheet metal material and protruded obliquely from the plane of the connecting webs 50.

This is over Figure 11 more clearly recognizable. Figure 11 shows a perspective view of the basic structure of the spring-loaded terminal connection 3 from the underside. Essentially, the description of the spring-loaded terminal connection can be used here Figure 2 to get expelled. In this exemplary embodiment, however, there are no latching openings for latching the closure cover 40, but latching lugs 57 in the form of material flaps protruding obliquely from the plane of the connecting webs 50. These form a stop for the latching contour of the closure cover 40.

Figure 12 FIG. 11 shows a perspective view of the closure cover 40 of the spring-loaded terminal connection 3 from FIG Figure 10 . It becomes clear that a pair of opposing fingers 42a, 42b are arranged at a distance from one another for each spring-loaded terminal connection 3. These fingers 42a, 42b protrude transversely from the plane of the cover plate 41. The latching contour of the fingers 42a, 42b for latching with the latching lugs 57 is embodied in this exemplary embodiment by a recess 45 made in each of the fingers 42a, 42b. For latching with a protruding latching lug 57 of the spring-loaded terminal connection 3, the latching contour must in any case have a stop surface that interacts with the latching lug 57 and does not necessarily have to be designed with a recess 45.

It can also be seen that there are cover tongues 43 of the cover plate 41 between two adjacent fingers 42a and 42b, which protrude on the plane of the cover plate 41 and are exposed by slots 44 from the portions of the cover plate 41 that merge into the fingers 42a, 42b. These Slots 44 serve to accommodate housing wall sections of the insulating material housing 2 and contribute to increasing the air and creepage distances between the spring-loaded terminal connection 3 and the outside and thus to improved electrical insulation.

Figure 13 shows a perspective view of the underside of the insulating material housing 2. It can be seen that this insulating material housing 2 is divided into chambers by partition walls 46. In this case, receiving chambers spaced apart from one another by an empty chamber are provided for receiving a spring-loaded terminal connection in each case. The web-like remaining wall sections 47 on the upper edge of the intermediate walls 46 are provided for dipping into a respective assigned slot 44 of the closure cover 40. The closure cover 40 dips into the recessed area of the partition walls 46 in order to be flush with the plane of the underside of the insulating material housing 2.

It can also be seen that the receiving chambers for the spring-loaded terminal connections 3 have depressions 48 towards the front and rear, through which the soldering connection surfaces, i.e. the sections of the spring-loaded terminal 3 that adjoin the connecting webs 50, dip.

In the illustrated embodiment, locking projections 49a protrude on both sides of the depressions 48. These can be part-circular as shown. Other forms are possible. A spring-loaded terminal connection 3 inserted into a receiving chamber is fixed in position with this locking projections 49a. For this purpose, the spring-loaded terminal connections 3 have as in Figure 11 shown corresponding locking indentations 49b into which the locking projections 49a dip.

Figure 14 shows a perspective view of the second embodiment of the conductor connection terminal 1 from the underside. The insulating material housing 2 is equipped with spring-loaded terminal connections 3, the solder connection surfaces of which protrude from the insulating housing 2. It becomes clear that the closure cover 40 is inserted flush into recesses in the insulating material housing 2, so that the fingers 42a, 42b protrude into the indented area of the spring-force terminal connections 3 and latch there with the spring-force terminal connections 3.

It can also be seen that the cover tongues 43, the intermediate chambers, the cover, in the case of web-like wall sections 47, protrude into the slots 44 between each cover tongue 43 and the section of the cover plate 41 that merges into a finger 42a, 42b. The sealing cover 40 is thus fixed in position and the air and creepage distances are optimized.

Figure 15 FIG. 14 shows a perspective view of the conductor connection terminal 1 from FIG. 14 from the top with a view of the rear. There are actuation openings 19 on the rear, which lead to the actuation tabs 13 of a spring-loaded terminal connection 3.

Test openings 51 are optionally made on the top of the insulating material housing 2. Test pins can be inserted into test openings 51 in order to measure the electrical potential at a spring-loaded terminal connection 3. It is also conceivable, however, that the test openings 51 are used as actuation openings.

It is also clear that the insulating material housing 2 has a collar 52, in particular on the front and rear. This collar 52 is intended to rest on the underside of a circuit board in order to place the conductor connection terminal 1 on a circuit board and to reduce the forces acting on the soldered connections on the soldering connection surfaces with the circuit board as much as possible.

Figure 16 shows the conductor connection terminal 1 Figure 15 from the front. It can be seen that the conductor entry openings 5 are made on the front side.

As in Figure 15 It is also clear here that the closure cover 40 merges flush with the collar 52 of the insulating material housing 2, so that the collar 52 together with the closure cover 40 covers the insulating material housing 2 on the underside.

Figure 17 shows the conductor connection terminal 1 Figure 10 in the side sectional view with an additional operating tool 20. The operating tool 20 has a handle part 53 from which an operating finger 24 protrudes. The actuating finger 24 is designed as a plate or rod-shaped element with a round or preferably angular cross section and designed for insertion into an actuating opening 19. The actuating finger 24 then passes between two actuating tabs 13 of a spring-loaded terminal connection 3 in order in this way to press apart the leaf spring tongues 11, which are respectively connected to a pair of actuating tabs 13, and thus to open the clamping point formed by the leaf spring tongues 11 for clamping an electrical conductor.

Otherwise, refer to the statements Figure 10 to get expelled. In any case, it becomes clear that the underside of the conductor connection terminal 1 is covered by the closure cover 40.

Figure 18 shows the second embodiment of the conductor connection terminal 1 according to Figure 14 now in a two-pole embodiment. Here we can essentially go back to the remarks Figure 14 to get expelled. In this two-pole conductor connection terminal 1, two spring-force terminal connections 3, each spatially separated from one another by an intermediate chamber, are provided, each with associated conductor insertion openings 5 in the insulating material housing 2.

Figure 19 shows an embodiment of this conductor connection terminal 1 in the single-pole variant. There is only a single spring-loaded terminal connection 3, which dips into a receiving opening in the insulating material housing 2, which is covered by the cover 40.

Claims (19)

1. A conductor connection terminal (1) having an insulative housing (2) and having a spring clamp terminal (3) which has a contact body formed of a sheet metal member having a bottom portion (8), spaced apart side wall portions (9) projecting from the bottom portion (8) and solder terminal contact tongues (4), the solder terminal contact tongues (4) being bent out of the plane of the bottom portion (8), spanning a solder connection plane offset from the plane of the base section (8) and forming an indented region of the base section (8), the solder connection contact tongues (4) each being connected to the base section (8) via a connecting web (50), and the base section (8) forming, with the side wall sections (9), a conductor receiving channel for receiving an electrical conductor (27) wherein at least one leaf spring tongue (11) projects from the side wall sections (9) and has a clamping edge (12) for clamping an electrical conductor (27) accommodated in the conductor accommodating channel, and wherein the insulating material housing (2) has at the front a conductor insertion opening (5) leading to the conductor accommodating channel, characterized in that the indented region is designed as a free space for latching a closure cover (40), latching lugs (57) being formed on the connecting webs (50) and forming a stop for a latching contour of the closure cover (40).
2. Conductor connection terminal (1) according to claim 1, characterized in that a closure cover is provided for latching into the indented region, the latching lugs (57) forming a stop for the latching contour of the closure cover (40), and the closure cover (40) having latching lugs (56) which are adapted for latching into latching openings (17) in the contact body.
3. Conductor connection terminal (1) according to claim 2, characterized in that the closure cover (40) has latching openings or latching edges adapted to latch with the latching lugs (57) of the contact body.
4. Conductor connection terminal (1) according to one of claims 2 or 3, characterized in that the closure cover (40) has fingers (42a, 42b) projecting perpendicularly from a cover plate (41) of the closure cover (40), a pair of such fingers (42a, 42b) in each case being arranged opposite one another at a distance from one another and being adapted for dipping into the indented region for abutment in each case adjacent to a connecting web (50) of the contact body leading from the base portion (8) to a solder connection contact tongue (4).
5. Conductor connection terminal (1) according to claim 4, characterized in that the fingers (42a, 42b) each have the latching contour, the latching contours each being designed to latch with a latching lug (57) of the contact body.
6. Conductor connection terminal (1) according to claim 4, characterized in that the fingers (42a, 42b) each have a latching lug which is designed to latch into a latching opening (17) of the respectively adjacent connecting web (50) of the contact body.
7. Conductor connection terminal (1) according to one of claims 4 to 6, characterized in that cover tongues (43) of the cover plate (41) project on the plane of the cover plate (41) between two fingers (42a, 42b) of the closure cover (40) arranged next to one another, the cover tongues (43) being exposed by slots (44) from the sections of the cover plate (41) merging into the fingers (42a, 42b).
8. Conductor terminal (1) according to one of the preceding claims, characterized in that the cover section (18) of the insulating material housing (2) opposite the base section (8) is completely closed upwardly on the side of the spring-loaded terminal (3) facing away from the base section (8) in the region adjacent to the side wall sections (9) and the leaf spring tongues (11) of the contact body, in that actuating tabs (13) project from the leaf spring tongues (11) so as to face away from the base portion (8), and in that the insulating material housing (2) has, on the rear side opposite the conductor insertion opening (5), an actuating opening (19) which leads to the actuating tabs (13), the actuating opening (19) being bounded by the cover portion (18) of the insulating material housing (2), forming a guide channel.
9. Conductor connection terminal (1) according to claim 8, characterized in that the guide channel of the actuating opening (19) is formed by the cover section (18) through spaced-apart lateral inner wall sections of the insulating material housing (2) and by a base section (21) opposite the cover section (18) and the base sections (21).
10. Conductor terminal (1) according to claim 9, characterized in that the base portion (21) is spaced from the bottom portion (8) of the spring clamp terminal (3) forming a conductor receiving pocket (22).
11. Conductor terminal (1) according to any one of claims 8 to 10, characterized in that the guide channel ends immediately before the actuating tabs (13).
12. Conductor connection terminal (1) according to one of the claims 8 to 11, characterized in that the actuating opening (19) extends through the insulating material housing (2) from the rear side to the front side and opens out on the front side adjacent to the conductor insertion opening (5).
13. Conductor connection terminal (1) according to claim 12, characterized in that an actuating element (26) is displaceably accommodated in the actuating opening (19), the actuating element (26) having a projecting actuating section (29) which is designed to apply force to the actuating tabs (13) in order to open the clamping point formed by the clamping edges (12).
14. Conductor terminal (1) according to claim 13, characterized in that the actuating element (26) has a head portion (30) accessible from the rear side of the insulating material housing (2) for applying force and a signal portion (32) projecting from the front side of the insulating material housing (2) in the opened state of the spring-loaded clamping terminal (3).
15. Conductor connection terminal (1) according to one of the preceding claims in conjunction with claim 2, characterized in that an indentation (6) is provided on the cover section (18) of the insulating material housing (2) in the rear-side region which is opposite the conductor insertion opening (5), which indentation (6) merges into an actuation opening (19).
16. Conductor terminal (1) according to one of the preceding claims in conjunction with claim 2, characterized in that the insulating material housing (2) has a plurality of conductor insertion openings (5) arranged next to one another, and in that the conductor terminal (1) has a plurality of spring-loaded clamping terminals (3) accommodated next to one another in the insulating material housing (2) and assigned to a respective conductor insertion opening (5).
17. Set of conductor terminal (1) according to any one of claims 8 to 16 and actuating tool (20), characterized in that the actuating tool (20) has a holding portion (23) and an actuating finger (24) designed for insertion into the actuating opening (19) and for pushing apart the actuating tabs (13) to open the clamping point.
18. Set according to claim 17, characterized in that the retaining portion (23) and the actuating finger (24) are at an angle to each other.
19. Set according to one of claims 17 or 18, characterized in that a plurality of actuating fingers (24) arranged side by side and spaced apart from one another are provided on the holding portion (23) for insertion into a respective associated actuating opening (19) of a plurality of actuating openings (19) of the insulating material housing (2) of the conductor connection terminal (1).

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