EP2917971B1 - Spring force terminal connection and electric device therewith - Google Patents

Description

• einer Stromschiene,
• einer Klemmfeder, die einen Anlageabschnitt hat, der sich an der Stromschiene abstützt, einen Federbogen hat, der sich an den Anlageabschnitt anschließt, einen Betätigungsabschnitt hat, der sich an den Federbogen anschließt und gegenüber von dem Anlageabschnitt liegt, und einen Klemmabschnitt hat, der sich an den Betätigungsabschnitt anschließt und sich von dem Betätigungsabschnitt in Richtung Stromschiene erstreckt,
  wobei der Klemmabschnitt eine Leiterdurchführungsöffnung hat und die Stromschiene durch die Leiterdurchführungsöffnung hindurchgeführt ist und eine Klemmstelle für einen anzuschließenden Leiter zwischen der Stromschiene und einem die Leiterdurchführungsöffnung begrenzenden Quersteg vorhanden ist,
• und mit einem Betätigungselement, das beweglich zur Beaufschlagung des Betätigungsabschnitts so gelagert ist, dass der Quersteg, welcher die Leiterdurchführungsöffnung begrenzt und eine Klemmstelle bildet, bei Bewegung des Betätigungselementes z. B. durch Verschwenken oder Linearbewegung in eine Offenstellung von der Stromschiene wegbewegbar ist.

The invention relates to a spring-force clamping connection with:

• a busbar,
• a clamping spring having a abutting portion which is supported on the bus bar, has a spring bow adjoining the abutment portion, has an operating portion which adjoins the spring bow and faces the abutment portion, and has a clamping portion which extends connects to the actuation section and extends from the actuation section in the direction of the busbar,
  wherein the clamping portion has a conductor lead-through opening and the bus bar is passed through the conductor leadthrough opening and a terminal point for a conductor to be connected is present between the conductor rail and a transverse web delimiting the conductor lead-through opening,
• and with an actuating element, which is movably mounted to act on the actuating portion so that the transverse web, which defines the conductor passage opening and forms a nip, upon movement of the actuating element z. B. is moved away by pivoting or linear movement in an open position of the busbar.

The invention further relates to an electrical device with an insulating material housing and with at least one such spring force clamping connection in the insulating material housing.

Spring-cage terminals are in a variety of forms z. B. from conductor terminals, box terminals, terminal blocks or installed in electrical equipment, such. As automation devices for industrial control or building automation known.

EP 1 213 791 B1 discloses an electrical connector with a cage tension spring with a self-supporting operating lever. This actuating lever is rotatably mounted on a bent busbar section.

DE 10 2008 060 282 A1 shows a tool-operated spring clip for an electrical conductor, in which an actuating lever is suspended in a recess of the abutment leg of a cage tension spring and passed laterally with at least one side leg of the cage tension spring.

DE 10 2008 052 626 A1 describes a terminal with a clamping spring on both sides embracing bracket on which an actuating lever is articulated.

Out EP 2 001 086 B1 is a screwless terminal with a cage tension spring known in which behind the spring bow of the cage tension spring an actuating lever is mounted in a bearing arc of a busbar. The actuating lever engages around the busbar on both sides and rests on the actuating portion of the cage tension spring.

US 2007/0207662 A shows a multi-pole conductor connector with spring connection contacts. These can be opened with slidably mounted in the insulating housing actuating levers for clamping and removal of an electrical conductor.

US 2012/0077391 A1 discloses a spring force clamping connection with a cage tension spring mounted on a bus bar piece. An actuating screw is passed through an opening in the actuating leg and extends from there to the outside of the surrounding insulating housing.

DE 10 2008 060 283 A1 shows a terminal device with a bus bar piece on which two cage tension springs are superimposed, which are connected to each other via a common spring bow. An actuating lever is passed between the actuating legs of the two cage tension springs and pivotally mounted between the busbar piece and the plant leg of Käfigzugfedern.

Based on this, it is an object of the present invention an improved spring terminal connection with a self-supporting and compact actuator assembly to accomplish.

The object is achieved with the Federkraftklemmanschluss with the features of claim 1 and by the electrical device having the features of claim 7.

Advantageous embodiments are described in the subclaims.

For a Federkraftklemmanschluss with a cage tension spring is proposed that a relative to the busbar and supported on the busbar bearing portion bearing fixed bearing arm from the direction of the bus bar through a slot in the clamping section and / or in the operating section extends therethrough and to the movable mounting of the actuating element with the actuating element cooperates, wherein extending through the slot portion of the bearing arm is disposed in a region between the side edges of the clamping spring and the actuating element is pivotally or linearly slidably mounted on the bearing arm.

It is thus proposed not to guide a bearing arm laterally as usual on the side of the clamping spring, but pass the bearing arm through a slot in the clamping portion and / or in the operating portion of the Käfigzugfeder. In this case, the actuating element adjacent to the bearing arm and is in its operation for exerting an actuating force on the operating portion of the clamping spring. For a very compact and self-supporting actuating arrangement is realized, which has a closed power flow during pivoting of the actuating element. The lever actuating forces do not act on the housing in the static state and the actuation by the actuating element is largely independent of the insulating material of the terminal. The pitch of the terminal remains untouched, so that the proposed solution allows a narrow even taking into account the required creepage distances and creepage terminal.

The width of the Federkraftklemmanschlusses in the direction of division, ie transverse to the direction of extension the busbar and the clamping portion of the clamping spring is not increased by the actuator in any case.

The cage-type tension spring with bearing arm arranged thereon and guided therethrough as well as with the actuating element can also be handled separately as an assembly and installed in a device which already provides a busbar.

The provision of a slot in the clamping portion and / or in the operating portion for the implementation of the bearing arm has no adverse effect on the stress distribution in the cage tension spring. This is largely determined by the spring bow, which remains undisturbed.

It is particularly advantageous if the bearing arm is arranged centrally in the direction of the width of the clamping spring, d. H. the bearing arm is guided centrally transversely to the extension direction of the busbar and transversely to the extension direction of the clamping section and of the contact section of the cage tension spring. The bearing arm is thus located in the center, as viewed from the opposite side edges of the cage tension spring, where it is preferably arranged in the region of the clamping section. It is essential, however, that the bearing arm is not guided laterally past the clamping spring, but at least partially disposed in the space enclosed by the clamping spring.

An advantageous, self-supporting variant with linearly displaceable actuating element is achieved when the bearing arm is fixed to the busbar and the actuating element is arranged relative to the busbar linearly movable on the bearing arm.

The bearing arm is formed in a preferred embodiment as an extension of the abutment portion integral with the clamping spring. For this purpose, a Federblechabschnitt is cut or punched out of the contact portion and bent away in the direction of the operating portion of the contact portion and the bus bar disposed therein in the direction of actuating portion.

The actuator may then be pivotally mounted at the free end of the bearing arm. For this purpose, it is advantageous if the bearing arm at its end remote from the busbar has a pivot bearing and the actuating element is pivotally mounted in or on the pivot bearing.

In an alternative embodiment, it can also be mounted linearly movable on the exposed bearing arm. For this purpose, if necessary, another material tabs bent out of the clamping spring can be used for further guidance

It is also conceivable that a separate bearing arm between contact portion of the clamping spring and the busbar is arranged. This bearing arm may for example be formed from a plastic material.

It is particularly advantageous if the bearing arm has a pivot bearing at its end remote from the busbar and the actuating element is pivotably mounted in this pivot bearing. The bearing arm and the actuator can be two separate parts z. B. be made of plastic material. It is also conceivable that the bearing arm and the actuating element are formed as an integral plastic part with a film hinge.

Figur 1 -

Perspektivische Ansicht einer ersten Ausführungsform eines Federkraftklemmelementes mit Stromschiene, Käfigzugfeder und einem an einem integral mit der Stromschiene ausgeformten Lagerarm schwenkbar gelagerten Betätigungselement;

Figur 2 -

Seitenansicht des Federkraftklemmanschlusses aus Figur 1;

Figur 3 -

Draufsicht auf den Federkraftklemmanschluss aus Figur 1 und 2;

Figur 4 -

Seiten-Schnittansicht im Schnitt B-B des Federkraftklemmanschlusses auf den Figuren 1 bis 3

Figur 5 -

Seitenansicht einer Klemmfeder der für die erste Ausführungsform des Federkraftklemmanschlusses gemäß Figuren 1 bis 4;

Figur 6 -

Perspektivische Ansicht der Käfigzugfeder aus Figur 5

Figur 7 -

Perspektivische Ansicht einer zweiten Ausführungsform eines Federkraftklemmanschlusses mit separatem zwischen Anlageabschnitt und Stromschienen angeordneten Lagerarm und daran angelenkten Betätigungselement in Vorderseitenansicht;

Figur 8 -

Perspektivische Ansicht des Federkraftklemmanschlusses aus Figur 7 in Rückseitenansicht;

Figur 9 -

Seitenansicht der zweiten Ausführungsform des Federkraftklemmanschlusses nach Figuren 7 und 8;

Figur 10 -

Draufsicht auf den Federkraftklemmanschluss aus Figuren 7 bis 9;

Figur 11 -

Seiten-Schnittansicht der zweiten Ausführungsform des Federkraftklemmanschlusses im Schnitt F-F;

Figur 12 -

Perspektivische Ansicht der zweiten Ausführungsform des Federkraftklemmanschlusses mit hochgestelltem Betätigungselement in der Offenstellung;

Figur 13 -

Perspektivische Rückseitenansicht des geöffneten Federkraftklemmanschlusses aus Figur 12;

Figur 14 -

Seitenansicht des geöffneten Federkraftklemmanschlusses aus Figuren 12 und 13;

Figur 15 -

Perspektivische Ansicht der Käfigzugfeder für die zweite Ausführungsform des Federkraftklemmanschlusses gemäß Figuren 7 bis 14;

Figur 16 -

Perspektivische Rückseitenansicht des Federkraftklemmanschlusses aus Figur 15;

Figur 17 -

Perspektivische Ansicht auf die Käfigzugfeder aus Figuren 15 und 16 von oben;

Figur 18 -

Draufsicht auf die Käfigzugfeder aus Figuren 15 bis 17;

Figur 19 -

Seitenansicht der Käfigzugfeder aus Figuren 15 bis 18;

Figur 20 -

Perspektivische Ansicht eines elektrischen Gerätes mit Isolierstoffgehäuse und darin eingebauten Federkraftklemmanschlüssen der zweiten Ausführungsform;

Figur 21 -

Draufsicht auf das elektrische Gerät aus Figur 20;

Figur 22 -

Seiten-Schnittansicht durch das elektrische Gerät gemäß Figuren 20 und 21 im Schnitt F-F;

Figur 23 -

Perspektivische Ansicht einer dritten Ausführungsform eines Federkraftklemmanschlusses mit linear beweglichem Betätigungselement von der Rückseite;

Figur 24 -

Perspektivische Ansicht der dritten Ausführungsform eines Federkraftklemmanschlusses in Ansicht von vorne;

Figur 25 -

Draufsicht auf zwei nebeneinander angeordnete Käfigzugfedern im geöffneten und geschlossenen Zustand der dritten Ausführungsform des Federkraftklemmanschlusses aus Figuren 23 und 24;

Figur 26 -

Seitenansicht der dritten Ausführungsform des Federkraftklemmanschlusses im Schnitt F-F der geöffneten Käfigzugfeder;

Figur 27 -

Seiten-Schnittansicht der dritten Ausführungsform des Federkraftklemmanschlusses im Schnitt G-G der geschlossenen Käfigzugfeder.

The invention will now be described by way of example with reference to the accompanying drawings. Show it:

FIG. 1 -

Perspective view of a first embodiment of a spring-loaded clamping element with busbar, cage tension spring and a pivotally mounted on an integrally formed with the busbar bearing arm actuating element;

FIG. 2 -

Side view of the spring force terminal connection FIG. 1 ;

FIG. 3 -

Top view of the spring force terminal connection FIGS. 1 and 2 ;

FIG. 4 -

Side sectional view in section BB of the spring clamp terminal on the FIGS. 1 to 3

FIG. 5 -

Side view of a clamping spring of the first embodiment of the spring terminal connection according to FIGS. 1 to 4 ;

FIG. 6 -

Perspective view of the cage tension spring FIG. 5

FIG. 7 -

Perspective view of a second embodiment of a spring terminal connection with separate arranged between the contact section and busbars bearing arm and hinged thereto actuator in front view;

FIG. 8 -

Perspective view of spring clamp terminal FIG. 7 in back view;

FIG. 9

Side view of the second embodiment of the spring terminal connection according to FIGS. 7 and 8 ;

FIG. 10 -

Top view of the spring force terminal connection FIGS. 7 to 9 ;

FIG. 11

Side sectional view of the second embodiment of the spring clamp terminal in section FF;

FIG. 12 -

Perspective view of the second embodiment of the spring clamp terminal with raised actuator in the open position;

FIG. 13

Perspective rear view of the opened spring-cage connection FIG. 12 ;

FIG. 14 -

Side view of the opened spring force terminal connection Figures 12 and 13 ;

FIG. 15 -

Perspective view of the cage tension spring for the second embodiment of the spring force terminal according to FIGS. 7 to 14 ;

FIG. 16

Perspective rear view of the spring force terminal connection FIG. 15 ;

FIG. 17

Perspective view of the cage tension spring FIGS. 15 and 16 from above;

FIG. 18

Top view of the cage tension spring FIGS. 15 to 17 ;

FIG. 19

Side view of the cage tension spring FIGS. 15 to 18 ;

FIG. 20 -

Perspective view of an electrical device with insulating housing and built-in spring terminal connections of the second embodiment;

FIG. 21 -

Top view on the electrical device FIG. 20 ;

Figure 22 -

Side sectional view through the electrical device according to Figures 20 and 21 on average FF;

FIG. 23

Perspective view of a third embodiment of a spring force terminal connection with linearly movable actuator from the back;

FIG. 24 -

Perspective view of the third embodiment of a spring clamp terminal in front view;

FIG. 25

Top view of two juxtaposed Käfigzugfedern in the open and closed state of the third embodiment of the Federkraftklemmanschlusses FIGS. 23 and 24 ;

FIG. 26 -

Side view of the third embodiment of the Federkraftklemmanschlusses in section FF of the open Käfigzugfeder;

Figure 27 -

Side sectional view of the third embodiment of the Federkraftklemmanschlusses in section GG of the closed Käfigzugfeder.

FIG. 1 lets a perspective view of a first embodiment of a spring force clamping element 1 recognize. The spring force clamping element 1 has a busbar 2, the free end is bent away to form a downwardly curved clamping edge 3 in a conventional manner upwards. The busbar 2 is designed narrower in the region of the free end. There, a clamping spring 4 is mounted in the busbar 2. The clamping spring 4 is formed as a known Käfigzugfeder. A cage tension spring is a loop-shaped structure made of a resilient material. The clamping spring 4 has a contact portion 5, which is supported on the busbar 2. In the illustrated embodiment, the contact portion is at least partially on the busbar 2. At the contact section 5, a spring bow 6 connects. The spring bow 6 passes into an operating section 7, which is opposite to the contact section 5. It is clear that contact section 5 and operating section 7 together with the spring bow 6 in cross-section are V-shaped. Of the operating portion 7 is a Bent clamping portion 8, which extends from the operating portion 7 down in the direction of contact section 5 and busbar 2.

The clamping portion 8 has in the central region a conductor passage opening 9 which is bounded at the lower free end of the clamping portion 8 by a transverse web 10. An introduced below the busbar 2 conductor is then guided by the busbar 2 downwardly displaced transverse web 10 through the conductor bushing opening 9 and clamped by the cross bar 10 on the busbar 2. The conductor is preferably clamped to the exposed clamping edge 3 of the busbar 2.

The clamping section 8 has through the shaped conductor lead-through opening 9 two lateral edge webs 11, which are connected to each other in the lower region by the transverse web 10.

The clearance created by the conductor lead-through opening 9 in the clamping section 8 is used for a bearing arm 12 which extends from the direction of the busbar 2 through the slot formed in the clamping section 8 in the illustrated embodiment by means of the conductor lead-through opening 9 and preferably above the transition from the actuating section 7 to the clamping section 8 ends. It is clear that a separate actuator 13 is pivotally mounted on the bearing arm 12 in the form of a lever arm. For this purpose, the free end of the bearing arm 12 is bent and a non-visible bearing axis is hooked into the bent end 14 of the bearing arm 12.

The actuating element 13 has two spaced-apart actuating fingers 15, between which the bearing arm 12 is received. The actuating fingers 15 merge into a forwardly projecting head part 16, which connects the actuating fingers 15 with each other. Head 16 and actuating finger 15 are integrally formed of a plastic material together with the non-visible bearing axis.

The actuating fingers 15 have in the direction of the clamping spring 4 adjacent to the actuating portion 7 adapted to the operating portion 7 waveform such that the free ends of the actuating fingers 15 when pivoting the head portion 16 down in the direction of the busbar 2 and contact section 5 and thereby move the actuating portion 7 in the direction of abutment section 5. In this case, the crossbar 10 of the clamping portion 8 moves away from the busbar 2 to open the clamping point formed by the crossbar 10 and the busbar 2 away.

FIG. 2 leaves the spring force terminal 1 from FIG. 1 recognize in the side view. It is clear that the bearing arm 12 is formed integrally with the clamping spring 4. It is punched or cut free from the sheet metal part of the contact section 5 and bent in the region of the free end of the contact section 5 out of this upwardly opposite to the extension direction of the clamping section 8.

It is clear that the bearing arm 12 is not guided laterally past the clamping spring 4, but is arranged in the region between the side edges of the clamping spring 4. In the illustrated embodiment, the bearing arm 12 is passed between the edge webs 11 of the clamping portion 8 through the conductor passage opening 9 of the clamping portion 8.

FIG. 3 leaves a top view of the spring force terminal connection Figures 1 and 2 detect. It is clear that the actuating element 13 has a head part 16 with integral thereto actuating fingers 15. The actuating fingers 15 are spaced so far apart that they receive the bearing arm 12 with the bent free end 14 between them to pivot the actuating member 13 to the bearing arm 12.

This is from the side sectional view in section BB of the FIG. 4 even clearer. Here it can be seen that extends transversely to the bearing arm 12, a bearing axis 17 in the width direction (ie in the direction of view) of the spring terminal connection 1. It can be seen that the bearing axis 17 is cylindrical and the more than 180 degrees bent free end 14 of the bearing arm 12 is snapped onto the bearing axis 17. Thus, the actuating element 13 is pivotally mounted on the bearing arm 12. Due to the bending of the free end 14 by more than 180 degrees, the bearing axis 17 firmly enclosed by the free end 14 and can not just dodge down.

It is also clear that the head part 16 in the illustrated in rest position in Leitereinsteckrichtung, i. in the illustrated side sectional view, from right to left extending actuating opening 18 has. The actuating opening 18 is provided for receiving the free end of an actuating tool, such as a screwdriver, with which the lever arm for pivoting the actuating element 13 is extended upward and the operation is facilitated. The actuating opening 18 is therefore designed to taper conically towards the bottom in the illustrated embodiment.

FIG. 5 shows a side view of the clamping spring 4, as used in the previously described embodiment of the spring terminal connection 1. In contrast to the known Käfigzugfedern a bearing arm 12 is bent out of the contact portion 5 in the central region adjacent to the free end of the contact section 5. The bearing arm 12 extends from the contact portion 5 opposite to the Ersteckungsrichtung of the clamping portion 8 and ends above the transition between the actuating portion 7 and clamping portion 8 in a bent free end 14. At the bearing arm 12 with the bent free end 14, a suitably trained actuating element is then stored. In this way, a self-supporting lever-operated spring clamp terminal is realized with cage clamp, which is very compact, material-saving and simple.

FIG. 6 leaves a perspective view of the clamping spring 4 FIG. 5 detect. From this it is more clearly visible that the clamping section 8, leaving out edge webs 11 has a conductor lead-through opening 9, which extends up to an arc in the transition to the actuating portion 7. In the head portion of the sheet 19 in the transition between the clamping portion 8 and the operating portion 7 is provided with respect to the conductor passage opening 9 narrower recess 20 into which the bearing arm 12 when pressing down the operating portion 7 in the direction of investment section 5 can dip.

The free end of the contact section 5 ends in narrower protruding lugs 21, on which the edge webs 11 of the clamping section 8 are guided past.

FIG. 7 shows a perspective view of a second embodiment of a spring terminal connection 1 recognize. This in turn consists of a clamping spring 4 in the form of a cage tension spring, a busbar 2 and an actuating element 13. In this embodiment, the bearing arm 22 is not formed integrally with the clamping spring 4 as in the first embodiment, but formed as a separate part. The bearing arm 22 is preferably a plastic part. He has a placed between busbar 2 and contact section 5 of the clamping spring socket 23. From the base 23 a perpendicular standing on the base 23 arm portion 24 extends vertically upwards. The arm section 24 is arranged in the free space formed by the edge webs 11 of the clamping section 8 and thus substantially in the space defined by the cage tension spring. At the free end of the arm portion 24, which is opposite to the base 23, the actuating element 13 is pivotally mounted. For this purpose, a bearing axis 17 is passed through a bearing opening 25 in the actuating fingers 15 of the actuating element 13, which is received in a corresponding non-visible bearing opening of the frame portion 24. In this way, the actuating element 13 is pivotally held on the arm portion 24 of the bearing arm 22.

FIG. 8 omits the second embodiment of the spring terminal connection 1 FIG. 7 recognize in the perspective rear view. It is clear that the actuating element 13, as in the first embodiment, has spaced-apart actuating fingers 15, which rest with their curved underside on the actuating section 7 of the clamping spring 4.

It can also be clearly seen that the bearing arm 22 with its base 23 is pushed through the conductor leadthrough opening 9 of the clamping section 8 of the clamping spring 4 in order to be placed between the busbar 2 and the contact section 5. The contact section 5 is thus supported indirectly on the busbar 2 and lies directly on the base 23 of the bearing arm 22.

FIG. 9 leaves a side view of the spring force terminal 1 from FIGS. 7 and 8 detect. It can be seen that the base 23 at its right free end, to which the arm portion 24 of the bearing arm 22 adjoins a downwardly facing protrusion 25, which dips into the formation of a clamping edge 3 created curvature at the free end of the busbar 2. In this way, the bearing arm 22 is fixed in position on the busbar 2.

FIG. 10 leaves a top view of the spring force terminal 1 from FIGS. 7 to 9 detect. In contrast to the first embodiment, the actuating element 13 is completely closed on the upper side, so that the actuating fingers 15 are connected to each other not only by the head part 16, but also at the top.

FIG. 11 Fig. 14 is a side sectional view of the spring force clamping terminal 1 of the second embodiment FIGS. 7 to 10 detect. It is clear from this that the head part 16 of the actuating element 13 has, on the front end side, a recess 18 tapering towards the bottom for receiving an actuating element. In that regard, reference may be made to the comments on the first embodiment.

It can also be seen that the arm portion 24 of the bearing arm 22 at the upper free end, which is opposite the base 23, has a bearing opening 26, through which the bearing shaft 17 is inserted therethrough.

FIG. 12 shows a perspective view of the second embodiment of a spring-force clamping connection 1 from the front in the open position. Here, the actuating element 13 is pivoted in contrast to the rest position previously shown by about 90 degrees with the head part 16 upwards. The actuating fingers 15 in this case travel with their free ends relative to the bearing axis 17 and the head part 16 downwards in the direction of the busbar 2, so that the actuating portion 7 is pressed down to the contact leg 5 and the busbar 2. As a result, the nip is opened. The nip is by the Crossbar 10, which limits the conductor opening 9 towards the bottom, and the clamping edge 3 formed on the busbar 2. An electrical conductor can now be inserted in the direction from the front, ie from right to left through the conductor passage opening 9 of the clamping portion 8 of the clamping spring 4, after pivoting of the actuating element 13 in the rest position previously shown between the cross bar 10 and clamping edge 3 by the spring force of Clamping spring 4 to be electrically connected to the busbar 2 to be clamped.

It is clear that the separate bearing arm 22 is received in the slot in the clamping portion and partially in the operating portion of the clamping spring 4 and extends through the slot formed by the conductor passage opening 9 and the recess 20 in the clamping spring 4 therethrough.

This is from the perspective rear view of the FIG. 13 even clearer. Here it can be seen that the arm section 24 is additionally guided by the base 23 through a recess 28 in the contact section 5. These recesses in the clamping spring 4 are seen in the width direction between the side edges of the clamping spring 4 and preferably arranged centrally or centrally. The bearing arm 22 is thus arranged at half the width of the busbar 2 and the clamping spring 4.

FIG. 14 shows a side view of the second embodiment of the spring terminal connection 1 in the open position. In this illustrated open position, the actuating element 13 is preferably locked in place. This is achieved in that the actuating portion 7 of the clamping spring 4 now exerts a force on the actuating element 13, which is directed in this open position approximately to the bearing axis 17 out. For a tilting moment is avoided, which would cause a pivoting back of the actuating element 13 in the rest position.

The curve shape of the actuating fingers 15 is thus adapted to the kinematics of the actuating element 13 and the clamping spring 4 so that in each angular position of the actuating element 13 a best possible force and torque distribution is ensured.

FIG. 15 lets recognize a perspective view of the clamping spring 4 of the second embodiment of the spring terminal connection 1 in the installed position. Compared to the clamping spring 4 for the first embodiment, the recess 20 is formed longer and extends further into the operating portion 7 inside. This is caused by the fact that the arm portion 24 of the bearing arm 22 spans a larger, triangular-shaped surface than the bearing arm 12 of the first embodiment, which is designed as a flat sheet metal element.

Furthermore, it can be seen that a recess 28 is provided in the contact section 5, through which the arm section 24 of the bearing arm 22 is passed.

This is based on the perspective view in Figures 16 and 17 more clearly, which show the clamping spring 4 in the rear perspective view and perspective view obliquely from above. The recess 20 forms, together with the Leiereinführungsöffnung 9 a first slot and the recess 28 a second slot through which the bearing arm 22 can extend from the underside of the contact portion 5 upwards in the direction of the transition between the operating portion 7 and clamping portion 8 therethrough. These recesses 20, 28 and the conductor lead-through opening 9 are bounded on both sides by the side edges of the clamping spring 4 and in particular by the edge webs 11 of the actuating section 8 or are located within the space formed by the edge webs 11 and the side edges of the clamping spring 4.

FIG. 18 leaves a top view of the clamping spring 4 FIGS. 15 to 17 detect. From this it is clear that the recess 20, the conductor bushing opening 9 and the recess 28 in the plant leg 5 in the middle in the width direction seen (in the representation from bottom to top) are arranged.

FIG. 19 leaves a side sectional view in section FF of the clamping spring 4 from FIG. 18 detect. It can be seen from the hatched sections that FF spring sheet material for the transverse web 10, the actuating section 7, the spring bow 6 and the contact section 5 is present there on average. It is also clear that in the central section FF in the transition between the operating section 7 and clamping section 8 a slot through the recess 20 and the conductor passage opening 9 is provided, which is limited only at the free end of the clamping portion 8 by the transverse web 10. The contact section 5 also has a slot running up to the free end, which slot is formed by the recess 28.

FIG. 20 lets recognize a perspective view of an electrical device, are installed in the two spring terminal connections of the type mentioned in an insulating 29. In the illustrated embodiment, the second embodiment of the spring force terminal 1 was used. Equally, however, the Federkraftklemmanschluss the first embodiment can be used.

The Federkraftklemmanschlüsse 1 are self-supporting and can be installed together with the actuator 13, busbar 2 and 4 spring clamp and bearing arm 22 assembled in the insulating material. At the front end wall 30 of the insulating material 29 conductor insertion openings 31 are present, which open into the space directly below the busbar 2 to clamp an electrical conductor of the clamping spring 4 to the busbar 2.

The head part 16 of the actuating elements 13 respectively projects out of the housing through a corresponding recess and is preferably aligned flush with the upper side 32 of the insulating housing in the rest position (right-hand spring clamp connection) on the upper side. This creates a closed block-like connection terminal.

This is based on the top view of the electrical device FIG. 20 in the FIG. 21 more clear.

FIG. 22 shows a side sectional view in section FF through the spring force clamp connection 1 located in the open position. It can be seen here that the spring terminal connection 1 together with the busbar 2, clamping spring 4, bearing arm 22 and actuating element 13 is fixed in its entirety in the insulating housing 29. It can be seen that the conductor insertion openings 31 on the end wall 30 of the insulating material 29 in the terminal space 32 open below the busbar 2. The insulating housing 29 is designed in several parts and locked together by means of a latching device 33. For example, the latching device 33 has a latching lug on one part, which latched into a latching opening of the other part to firmly connect the two housing parts after installation of the spring-force terminal 1 with each other.

FIG. 23 shows a perspective view of a third embodiment of a spring terminal connection 1 recognize. In the illustrated embodiment, two spring terminal connections 1 are arranged side by side in the open position and rest position. The front spring terminal 1 is in the open position, in which the nip is opened, while the rear spring terminal is in the closed position with closed nip. In contrast to the previously described embodiments, the actuation does not take place by pivoting an actuating element 13 (operating lever), but by linear displacement of an actuating element 13 designed as an actuating pushbutton.

Again, a bearing arm 22 extends through slots in the clamping spring 4 therethrough. In that regard, the clamping spring 4 is comparable to the clamping spring for the previously described second embodiment. On the relevant versions and the FIGS. 15 to 19 will be referred.

The bearing arm 22 is also mounted with a base 23 between contact section 5 of the clamping spring 4 and the busbar 2. The base 23 in turn has a protrusion 25, which dips into a corresponding recess for forming a clamping edge 3 on the busbar 2 to fix the bearing arm 22 with respect to its position on the busbar 2.

The actuating element 13 is made as a separate part of the bearing arm 22 and mounted linearly displaceable on the arm portion 24 of the bearing arm 22. The actuating element 13 in turn has two spaced actuating fingers 15, between which the arm portion 24 is received. The back faces the actuating fingers 15 are arranged inclined and may optionally also follow a certain curve shape. They rest on the actuating section 7 in the transition to the clamping section 8 on the clamping spring 4. When linear displacement of the actuating element 13, ie in the view of FIG. 23 from right to left, the clamping spring is transferred from the rear rest position shown in the open position shown in front by the operating portion 7 is pressed down in the direction of clamping section 5.

This will turn off again FIG. 24 more clearly, showing that the right actuator 13 is pushed forward in the rest position. The left, located in the open position actuator 13, however, is pressed backwards towards the spring bow 6 of the clamping spring 4.

In order to prevent tilting or falling out of the actuating element 13 upwards, the bearing arm 22 has at its upper free end a parallel to the busbar 2 and the base 23 aligned cover plate 35. In this way, in turn, a self-supporting spring terminal 1 is created, the pre-assembled in a Isolierstoffgehäuse can be installed. The busbar 2 can be part of the preassembled spring terminal connection 1. It is also conceivable that the busbar 2 is located in the electrical device, in which the Federkraftklemmanschluss is installed without preassembled busbar 2. When installing the spring clamp terminal 1 is then pushed onto the associated busbar 2.

FIG. 25 shows a plan view of the third embodiment of the spring force clamping connections 1 of FIGS. 23 and 24 detect. It is clear that the upper (rear) Federkraftklemmanschluss is in the rest position with closed nip, since the actuator 13 projects against the Leitereinsteckrichtung (from right to left) forward from the cover plate 35. In the lower (front) Federkraftklemmanschluss 1, the actuating element (not visible) under the cover plate 35 is linearly displaced, so that an actuating force exerted on the clamping spring 4 and the nip is opened.

FIG. 26 allows the located in the open position lower (front) Federkraftklemmanschluss in section FF with the underlying rear closed Federkraftklemmanschluss in the side sectional view. From this it is clear that the clamping spring 4 can be acted upon by linear displacement of the actuating element 13 with an actuating force, so that the operating portion 7 is pressed down in the direction of contact section 5, base 23 and busbar 2.

FIG. 27 shows a side sectional view in section GG of the spring force clamping connection 1 located at rest.

In comparison to FIG. 27 It is clear that the actuating element 13 is received linearly displaceable on the arm portion 24 of the bearing arm 22 and limited at the top by the cover plate 35. On the arm portion 24, a further guide plate 36 is disposed below the actuating element 13, which serves to guide the linearly displaceable actuating element 13 on the underside.

Claims (7)

1. A spring force terminal connection (1) comprising:

   - a busbar (2),

   - a clamping spring (4), which has a resting section (5) which is supported on the busbar (2), a spring bend (6), which adjoins the resting section (5), an actuating section (7), which adjoins the spring bend (6) and is opposite the resting section (5), and a clamping section (8), which adjoins the actuating section (7) and extends from the actuating section (7) in the direction of the busbar (2),

   - wherein the clamping section (8) has a conductor leadthrough opening (9), and wherein the busbar (2) is passed through the conductor leadthrough opening (9), and a clamping point for a conductor to be connected is provided between the busbar (2) and a transverse web (10) limiting the conductor leadthrough opening (9),

   - and comprising an actuating element (13), which is mounted movably for acting on the actuating section (7) in such a way that the transverse web (10), which limits the conductor leadthrough opening (9) and forms a clamping point, is movable away from the busbar (2) in the case of a movement of the actuating element (13) into an open position,

   - with a bearing arm (12, 22), which is fixed in position relative to the busbar (2) and the resting section (5) supported on the busbar (2), extending out of the direction of the busbar (2),

   - wherein the actuating element (13) is mounted displaceably pivotably or linearly on the bearing arm (12, 22),

   characterized in that the bearing arm (12, 22) extends through a slot (9, 20) in the clamping section (8) and/or in the actuating section (7), and in that that section of the bearing arm (12, 22) which extends through the slot (9, 20) is arranged in a region between the side edges of the clamping spring (4).
2. The spring force terminal connection (1) as claimed in claim 1, characterized in that the bearing arm (12, 22) is arranged centrally in the direction of the width of the clamping spring (4).
3. The spring force terminal connection (1) as claimed in claim 1 or 2, characterized in that the bearing arm (12) is formed integrally with the clamping spring (4) as an extension of the resting section (5) and is bent back in the direction of the actuating section (7).
4. The spring force terminal connection (1) as claimed in claim 1 or 2, characterized in that the bearing arm (22) is mounted between the resting section (5) of the clamping spring (4) and the busbar (2).
5. The spring force terminal connection (1) as claimed in one of the preceding claims, characterized in that the bearing arm (12, 22) has a pivot bearing at its end remote from the busbar (2), and in that the actuating element (13) is mounted pivotably in the pivot bearing.
6. The spring force terminal connection (1) as claimed in claim 1 or 2, characterized in that the bearing arm (22) is fixed on the busbar (2), and the actuating element (13) is arranged linearly movably relative to the busbar on the bearing arm (22).
7. An electrical device comprising an insulating housing (29) and comprising at least one spring force terminal connection (1) as claimed in one of the preceding claims in the insulating housing (29).

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