EP3320583B1 - Connection terminal - Google Patents

Connection terminal Download PDF

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Publication number
EP3320583B1
EP3320583B1 EP16734710.3A EP16734710A EP3320583B1 EP 3320583 B1 EP3320583 B1 EP 3320583B1 EP 16734710 A EP16734710 A EP 16734710A EP 3320583 B1 EP3320583 B1 EP 3320583B1
Authority
EP
European Patent Office
Prior art keywords
busbar
leg
housing
connection terminal
receptacle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16734710.3A
Other languages
German (de)
French (fr)
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EP3320583A1 (en
Inventor
Martin Gebhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Contact GmbH and Co KG
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Phoenix Contact GmbH and Co KG
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Publication of EP3320583A1 publication Critical patent/EP3320583A1/en
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Publication of EP3320583B1 publication Critical patent/EP3320583B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2675—Electrical interconnections between two blocks, e.g. by means of busbars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4828—Spring-activating arrangements mounted on or integrally formed with the spring housing
    • H01R4/48365—Spring-activating arrangements mounted on or integrally formed with the spring housing with integral release means

Definitions

  • the invention relates to a connection terminal for connecting an electrical conductor to a busbar.
  • Connection terminals are known in a large number of embodiments.
  • Connection terminals can, for example, connect a conductor to a printed circuit board as a so-called printed circuit board terminal or—as in the context of the present patent application—be designed to connect an electrical conductor to a busbar.
  • shield clamps have been known for many years, with which the cable shield of a generally multi-core cable can be connected to a busbar.
  • Such shield clamps are from the catalog " Terminal blocks CLIPLINE 1 2011", pages 546 - 548 of Phoenix Contact GmbH & Co. KG famous.
  • the known shield clamps have an approximately U-shaped metal connection body, slots being formed in the two legs of the connection body, with which the shield clamp can be plugged onto a busbar with a predetermined thickness.
  • a knurled screw is provided for contacting the cable shield of a cable to be connected, via which a large, spring-loaded pressure piece can be adjusted in height, so that the cable to be connected can be clamped between the pressure piece and the busbar.
  • the knurled nut is tightened, the shield clamp is fastened to the busbar at the same time, so that the knurled nut must be unscrewed again to loosen the shield clamp from the busbar.
  • these known shield clamps also have the disadvantage that when the connection body is released from the busbar, the cable to be connected must also be released from the shield clamp at the same time.
  • connection terminals are also only suitable for connecting the cable shield of a cable to a busbar with reference potential connected is.
  • the busbar is usually connected to a mounting rail via support brackets, on which several terminal blocks are then also arranged, to which the individual cores of the multi-core cable are connected.
  • the DE 35 10 210 A1 discloses a connecting terminal to be placed on a busbar, in which a retaining spring designed as a leg spring is arranged in the housing and has two legs in addition to a base. One leg is used together with a clamping screw to connect an electrical conductor, while the other leg is used to hold the connection terminal on the busbar. Within the housing, only one spring element is arranged with the retaining spring, which can be easily held in the housing.
  • the DE 201 19 510 U1 discloses a bus connection for electrical distribution systems which, in addition to several conductor connection terminals and a group busbar, also has two steel retaining springs for fastening the bus connection to a busbar.
  • the U-shaped steel retaining springs With the U-shaped steel retaining springs, the free end of the leg that contacts the busbar is bent away from the busbar, so that the leg contacts the busbar with a rounded area. This allows the busbar to be easily inserted into the U-shaped steel retaining springs. At the same time, however, the busbar can also be easily pulled out of the steel retaining spring.
  • a rear catch is provided on the housing of the busbar, which engages behind the busbar.
  • a plug-in device for plugging onto an electrical switching device which according to the exemplary embodiment in FIG. 4 has a separate housing part.
  • a further spring element for contacting a busbar is arranged in the housing part.
  • the free end of the leg contacting the busbar is bent away from the busbar, so that the leg contacts the busbar with a rounded area.
  • the present invention is based on the object of specifying a connection terminal for connecting an electrical conductor to a busbar, in which both the attachment of the connection terminal to a busbar and the detachment from a busbar are as simple as possible.
  • connection terminal for connecting an electrical conductor to a busbar with the features of patent claim 1 .
  • the connection terminal has a housing in which a conductor connection element and a current bar are arranged.
  • a conductor insertion opening for inserting the electrical conductor to be connected and a busbar receptacle for accommodating the busbar are formed in the housing.
  • a conductor connected by means of the conductor connection element is then electrically conductively connected via the current bar to the busbar arranged in the busbar receptacle.
  • a spring element is provided for fixing the busbar, the spring element having at least one leg and being arranged in the housing in such a way that the free end of the leg protrudes into the busbar receptacle when no busbar is arranged in the busbar receptacle is, while the spring element is deflected against its spring force when a busbar is arranged in the busbar receptacle.
  • the free end of the leg of the spring element then rests against the busbar at an acute angle ⁇ .
  • the angle ⁇ can be set in a simple manner, thereby achieving sufficiently large self-locking and thus reliably preventing the connection terminal from being unintentionally removed from the busbar in the opposite direction to the direction of attachment.
  • the use of a spring element for fixing the busbar has the advantage that on the one hand the spring element does not noticeably impede the insertion of the busbar into the busbar receptacle, and on the other hand the fixation is effective after the busbar has been inserted without the user having to operate it requirement.
  • the spring element is designed as a leg spring which has two legs, the second leg, which does not protrude into the busbar receptacle or is not in contact with the busbar, being supported as a bearing leg on an abutment in the housing.
  • the spring element can be held in the housing in a simple manner, with the leg spring also being able to be fixed in its position by corresponding ribs or holding domes in the housing.
  • connection terminal does not simultaneously result in the conductor connected to the connection terminal being released. Rather, the conductor can remain connected to the conductor connection element, which means that the conductor does not have to be reconnected after the connection terminal has been detached from the busbar.
  • connection element such as screw connections or tension springs
  • a U-shaped or V-shaped torsion spring is preferably used as the conductor connection element in the connection terminal according to the invention, which has a contact leg and a clamping leg, the clamping leg together with the current bar forming a spring-loaded clamping point for the stripped conductor to be connected.
  • a rigid conductor or a conductor provided with a ferrule can be inserted directly into the terminal point, ie without the terminal point having to be opened with a tool beforehand.
  • the torsion spring acts as a compression spring that presses the conductor to be connected with the clamping leg against the current bar. Consequently both the fixing of the connection terminal on a busbar and the connection of a conductor to the connection terminal can be carried out very easily without the use of a tool being required.
  • an actuation opening for inserting the tip of a tool for example a screwdriver, can be formed in the housing in addition to the conductor entry opening.
  • an actuating push-button is slidably arranged in the housing instead of an actuating opening for a tool.
  • the actuating button can be moved from a first position, in which the clamping arm of the torsion spring is not deflected, into a second position, in which the clamping arm is deflected by the tip of the actuating button, so that a connected electrical conductor can be removed from the terminal point and thus also can be pulled out of the conductor entry opening.
  • connection terminal according to the invention can be lifted off the busbar or the busbar can be pulled out of the busbar receptacle despite the spring element serving to fix the busbar, it is necessary for the leg of the spring element to be lifted off the fixed busbar by pushing the leg against the spring force of the Spring element is deflected.
  • a suitable tool for example the tip of a screwdriver, which is inserted into a corresponding opening in the housing and then deflects the leg of the spring element.
  • the terminal has an unlocking element that is movably arranged on or in the housing, so that it can be moved from a basic position to an unlocked position.
  • the leg of the spring element which faces the busbar and fixes the busbar in its position, is deflected by the unlocking element in such a way that the free end of the leg no longer rests against the busbar.
  • the terminal can then counter to the push-on direction lifted off the busbar or the busbar can be pulled out of the busbar holder in the opposite direction to the insertion direction.
  • Unlocking is facilitated by using a corresponding unlocking element, since the unlocking element can be arranged in such a way that it can be easily actuated by a fitter.
  • no separate tool then has to be used to unlock the connection terminal from the busbar.
  • the unlocking element--similar to the actuating push-button-- can be slidably arranged in the housing.
  • the unlocking element is preferably in the form of a lever which is pivotably attached to the housing via a hinge, the unlocking element having a gripping surface for actuation with a finger.
  • the actuation of the unlocking element can be carried out very easily by a fitter by simply pressing the gripping surface of the lever with a finger when lifting the connection terminal from the busbar, as a result of which the lever is pivoted so that the leg of the spring element is deflected and thus the fixation the connection terminal on the busbar is released.
  • the connection terminal In order to hold and position the busbar in the busbar receptacle, the connection terminal according to the invention preferably has a clamping lever which is rotatably mounted in the housing on the side of the busbar receptacle opposite the current bar.
  • the clamping lever has at least one clamping lug which protrudes into the busbar receptacle and which, when the busbar is arranged in the busbar receptacle, bears against the busbar on the side of the busbar which is remote from the current bar.
  • a busbar arranged in the busbar holder is pressed against the current bar by the clamping lever and clamped between the current bar and the clamping lug of the clamping lever, so that the busbar is also held in the busbar holder at the same time.
  • the clamping lever preferably also has an actuating projection, the free end of which is at a greater distance from the pivot point of the clamping lever than the clamping lug, so that the actuating projection--when the busbar is not inserted--protrudes further into the busbar receptacle than the clamping lug.
  • the current bar is slidably mounted in the housing, and a further spring element is arranged in the housing such that the spring element applies a force to the current bar in the direction of the busbar receptacle.
  • the additional spring element ensures that there is always a sufficient and largely constant contact force between the current bar and a busbar inserted in the busbar receptacle, so that good electrical contact between the current bar and the busbar is guaranteed, even if the thickness of the busbar used is certain has tolerances.
  • the further spring element is preferably also designed as a substantially U-shaped or V-shaped leg spring which has two legs.
  • the first leg is supported as a kind of contact leg on an abutment in the housing, while the second leg is in contact with the current bar.
  • the contact between the second leg of the leg spring and the current bar can be realized in that the second leg of the leg spring engages with its free end in a corresponding recess in the current bar.
  • the second leg is positively connected to the current bar, so that the position of the free end of the second leg in relation to the current bar does not change.
  • the second leg of the leg spring simply rests against the end of the current bar facing away from the busbar receptacle or the end of the current bar presses directly against the second leg of the leg spring.
  • the torsion spring is clamped with its two legs between the abutment in the housing and the current bar, and the torsion spring can also be secured in its position by corresponding ribs or retaining domes in the housing.
  • the figures show a preferred embodiment of a terminal 1 according to the invention for connecting a - not shown here - electrical conductor with a busbar 2. While in 1 the terminal 1 is shown without busbar 2, show the 2 and 3 the connection terminal 1 with busbars 2. In 3 the terminal 1 is still connected to the busbar 2, in contrast to the representation according to FIG 2 However, the fixation formed between the connecting terminal 1 and the busbar 2 is released, so that the connecting terminal 1 can be lifted off the busbar 2 counter to the direction A being attached.
  • the connection terminal 1 has a housing 3 in which a conductor connection element 4 in the form of a torsion spring and an L-shaped current bar 5 are arranged.
  • a conductor insertion opening 6 is formed in the housing 3 for inserting a conductor to be connected into the terminal point.
  • the housing 3, which is usually made of plastic also has a busbar receptacle 7 that is open on one side, so that the connecting terminal 1 can be plugged or placed onto a busbar 2 that may already be installed, with the busbar receptacle 7 in the plugging direction A. If the connection terminal 1 is installed, the busbar 2 can be inserted into the busbar receptacle 7 from the direction opposite to the plug-on direction A.
  • a spring element 8 is arranged in the housing 3 of the connecting terminal 1, which has a first leg 9, the free end 10 of which protrudes into the busbar receptacle 7, if no busbar 2 is arranged in the busbar receptacle 7, see above like this in Figures 1a and 1b is shown.
  • the spring element 8 is designed as a leg spring, so that in addition to the first leg 9 it also has a second leg 11 which acts as a contact leg and is supported on an abutment 12 in the housing 3 .
  • connection terminal 1 If the housing 3 of the connection terminal 1 is pushed onto a busbar 2 in the push-on direction A, the leg 9 is deflected by the busbar 2 against the spring force of the spring element 8, so that the busbar 2 can slide past the free end 10 of the leg 9. If the connection terminal 1 or the housing 3 is fully plugged onto the busbar 2, as shown in 2 is shown, the free end 10 of the leg 9 rests at an acute angle ⁇ on the side of the busbar 2 facing the spring element 8 . This will create the busbar 2 is fixed in the busbar receptacle 7, thus preventing the housing 3 from being unintentionally pulled off the busbar 2 or the busbar 2 being unintentionally pulled out of the busbar receptacle 7.
  • connection terminal 1 is to be intentionally removed from the busbar 2 arranged in the busbar receptacle 7 , the fixation created by the spring element 8 must be released by the leg 9 being deflected in the opposite direction to the spring force of the spring element 8 .
  • the tip of a screwdriver could be used, which would then have to be inserted into a corresponding opening in the housing 3 on the side of the busbar 2 facing the spring element 8 .
  • an unlocking element 13 is provided for releasing the fixation by the spring element 8, which has an actuating lug 14 protruding into the interior of the housing 3 and is movably arranged on the housing 3 via a hinge 15.
  • the approximately L-shaped unlocking element 13 designed as a lever has a gripping surface 16, which an installer only has to press with one finger to actuate the unlocking element 13, whereby the actuating lug 14 then presses against the leg 9 of the spring element 8 and thereby separates it from the Busbar 2 stands out.
  • This unlocked position in which the unlocking element 13 is actuated, is in 3 shown while the 1 and 2 show the unlocking element 13 in the basic position in which it is not actuated. If the unlocking element 13 is in the unlocked position, the connecting terminal 1 can be lifted off the busbar 2 easily—and without the need for further manipulation or the use of a tool. If the connection terminal 1 is not to be lifted off a fixed busbar 2 but instead the busbar 2 is to be pulled out of the busbar receptacle 7 of the connection terminal 1 , this is also easily possible by actuating the unlocking element 13 .
  • the conductor connection element 4 is designed as a leg spring which has a contact leg 17 and a clamping leg 18 .
  • a stripped electrical conductor introduced through the conductor entry opening 6 into the housing 3 is pressed by the clamping limb 18 against the limb 19 of the current bar 5 , the opposite side of which bears against the busbar 2 arranged in the busbar receptacle 7 .
  • the clamping leg 18 thus forms, together with the leg 19 of the current bar 5, a spring force clamping point for the conductor to be connected.
  • connection terminal 1 has an actuating push-button 20 which is displaceably arranged in the housing 3 and which can be displaced from a first position shown in the figures into a second position within the housing 3 .
  • the clamping leg 18 In the first position of the actuating pushbutton 20, the clamping leg 18 is not deflected, while in the second position of the actuating pushbutton 20 the clamping leg 18 is deflected to such an extent that a connected conductor is no longer in the clamping point between the clamping leg 18 and the leg 19 of the current bar 5 is stuck. The conductor can then simply be pulled out of the housing 3 of the connection terminal 1 through the conductor insertion opening 6 .
  • a clamping lever 21 is rotatably mounted in the housing 3 on the side of the busbar receptacle 7 opposite the current bar 5 .
  • the clamping lever 21 has two clamping lugs 22, 23, with which busbars 2 of different thickness can be held in the busbar receptacle 7 and pressed against the current bar 5.
  • the clamping lever 21 also has an actuating projection 24, the free end of which is at a greater distance from the fulcrum of the clamping lever 21 than the first clamping lug 22, which in turn is at a greater distance from the fulcrum than the second clamping lug 23.
  • the actuating projection 24 thus protrudes furthest into the busbar receptacle when the busbar receptacle 7 is free 7 in.
  • the busbar When the housing 3 is plugged onto a busbar 2, the busbar first hits the actuating projection 24, as a result of which the clamping lever 21 is pivoted counterclockwise until the housing 3 is completely placed on the busbar 2. How out 2 As can be seen, the clamping lug 22 then rests against the busbar 2 , as a result of which it is pressed against the current bar 5 and held in the busbar receptacle 7 .
  • another spring element 25 is arranged in the housing 3 .
  • the spring element 25 is located on the side of the current bar 5 facing away from the busbar receptacle 7 , the first leg 26 of the spring element being supported on an abutment 27 in the housing 3 and the second leg 28 being in contact with the current bar 5 .
  • the leg 28 rests directly on the end 29 of the current bar 5 facing away from the busbar receptacle 7, so that the spring element 25 applies a force to the current bar 5 in the direction of the busbar receptacle 7 or presses it against an inserted busbar 2 with a force.
  • the current bar 5 is slidably mounted in the housing 3 - perpendicular to the plug-on direction A.
  • the L-shaped current bar 5 is displaced by the force of the spring element 25 up to the stop 30 formed in the housing 3 in the direction of the busbar receptacle 7—to the left in the illustration.

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  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

Die Erfindung betrifft eine Anschlussklemme zum Verbinden eines elektrischen Leiters mit einer Sammelschiene.The invention relates to a connection terminal for connecting an electrical conductor to a busbar.

Elektrische Anschlussklemmen sind in einer Vielzahl von Ausführungsformen bekannt. Anschlussklemmen können beispielsweise zum Anschluss eines Leiters an eine Leiterplatte als sogenannte Printklemme oder - wie im Rahmen der vorliegenden Patentanmeldung - zum Verbinden eines elektrischen Leiters mit einer Sammelschiene ausgebildet sein. Als ein Anwendungsbeispiel derartiger Anschlussklemmen sind seit vielen Jahren Schirmklemmen bekannt, mit denen der Kabelschirm eines in der Regel mehradrigen Kabels an einer Sammelschiene angeschlossen werden kann. Derartige Schirmklemmen sind aus dem Katalog " Reihenklemmen CLIPLINE 1 2011", Seiten 546 - 548 der Phoenix Contact GmbH & Co. KG bekannt.Electrical connection terminals are known in a large number of embodiments. Connection terminals can, for example, connect a conductor to a printed circuit board as a so-called printed circuit board terminal or—as in the context of the present patent application—be designed to connect an electrical conductor to a busbar. As an application example of such connection terminals, shield clamps have been known for many years, with which the cable shield of a generally multi-core cable can be connected to a busbar. Such shield clamps are from the catalog " Terminal blocks CLIPLINE 1 2011", pages 546 - 548 of Phoenix Contact GmbH & Co. KG famous.

Die bekannten Schirmklemmen weisen einen näherungsweise U-förmigen metallischen Anschlusskörper auf, wobei in den beiden Schenkeln des Anschlusskörpers Schlitze ausgebildet sind, mit denen die Schirmklemme auf eine Sammelschiene mit vorgegebener Dicke aufgesteckt werden kann. Zur Kontaktierung des Kabelschirms eines anzuschließenden Kabels ist eine Rändelschraube vorgesehen, über die ein großflächiges, federndes Druckstück höhenverstellbar ist, so dass das anzuschließende Kabel zwischen dem Druckstück und der Sammelschiene eingeklemmt werden kann. Beim Anziehen der Rändelmutter erfolgt gleichzeitig die Befestigung der Schirmklemme an der Sammelschiene, so dass zum Lösen der Schirmklemme von der Sammelschiene die Rändelmutter wieder losgeschraubt werden muss. Neben dem damit verbundenen Montageaufwand weisen diese bekannten Schirmklemmen auch den Nachteil auf, dass beim Lösen des Anschlussköpers von der Sammelschiene gleichzeitig auch das anzuschließende Kabel von der Schirmklemme gelöst werden muss.The known shield clamps have an approximately U-shaped metal connection body, slots being formed in the two legs of the connection body, with which the shield clamp can be plugged onto a busbar with a predetermined thickness. A knurled screw is provided for contacting the cable shield of a cable to be connected, via which a large, spring-loaded pressure piece can be adjusted in height, so that the cable to be connected can be clamped between the pressure piece and the busbar. When the knurled nut is tightened, the shield clamp is fastened to the busbar at the same time, so that the knurled nut must be unscrewed again to loosen the shield clamp from the busbar. In addition to the associated assembly effort, these known shield clamps also have the disadvantage that when the connection body is released from the busbar, the cable to be connected must also be released from the shield clamp at the same time.

Aufgrund ihrer Ausgestaltung und ihres Anschlussprinzips sind die bekannten Anschlussklemmen außerdem ausschließlich zum Anschließen des Kabelschirms eines Kabels an eine Sammelschiene geeignet, die mit Bezugspotential verbunden ist. In der Regel wird dazu die Sammelschiene über Auflageböcke mit einer Tragschiene verbunden, auf der dann auch mehrere Reihenklemmen angeordnet sind, an die die einzelnen Adern des mehradrigen Kabels angeschlossen werden.Due to their design and their connection principle, the known connection terminals are also only suitable for connecting the cable shield of a cable to a busbar with reference potential connected is. For this purpose, the busbar is usually connected to a mounting rail via support brackets, on which several terminal blocks are then also arranged, to which the individual cores of the multi-core cable are connected.

Die DE 35 10 210 A1 offenbart eine Anschlussklemme zum Aufsetzen auf eine Sammelschiene, bei der im Gehäuse eine als Schenkelfeder ausgebildete Haltefeder angeordnet ist, die neben einer Basis zwei Schenkel aufweist. Der eine Schenkel dient dabei zusammen mit einer Klemmschraube zum Anschließen eines elektrischen Leiters während der andere Schenkel zum Halten der Anschlussklemme an der Sammelschiene dient. Innerhalb des Gehäuses ist dabei mit der Haltefeder nur ein Federelement angeordnet, dass einfach in dem Gehäuse gehalten werden kann.the DE 35 10 210 A1 discloses a connecting terminal to be placed on a busbar, in which a retaining spring designed as a leg spring is arranged in the housing and has two legs in addition to a base. One leg is used together with a clamping screw to connect an electrical conductor, while the other leg is used to hold the connection terminal on the busbar. Within the housing, only one spring element is arranged with the retaining spring, which can be easily held in the housing.

Die DE 201 19 510 U1 offenbart einen Sammelanschluss für elektrische Verteileranlagen, der neben mehreren Leiteranschlussklemmen und einer Gruppen-Stromschiene auch zwei Stahlhaltefedern zur Befestigung des Sammelanschlusses an einer Sammelschiene aufweist. Bei den U-förmigen Stahlhaltefedern ist das freie Ende des Schenkels, der die Sammelschiene kontaktiert, von der Sammelschiene weggebogen, so dass der Schenkel die Sammelschiene mit einem abgerundeten Bereich kontaktiert. Dies ermöglicht es, dass die Sammelschiene einfach in die U-förmigen Stahlhaltefedern eingesteckt werden kann. Gleichzeitig kann die Sammelschiene jedoch auch entsprechend einfach aus der Stahlhaltefeder wieder herausgezogen werden. Um ein ungewolltes Abziehen des Sammelanschlusses von der Sammelschiene zu verhindern, ist am Gehäuse des Sammelanschlusses eine Hinterrastung vorgesehen, die die Sammelschiene hintergreift.the DE 201 19 510 U1 discloses a bus connection for electrical distribution systems which, in addition to several conductor connection terminals and a group busbar, also has two steel retaining springs for fastening the bus connection to a busbar. With the U-shaped steel retaining springs, the free end of the leg that contacts the busbar is bent away from the busbar, so that the leg contacts the busbar with a rounded area. This allows the busbar to be easily inserted into the U-shaped steel retaining springs. At the same time, however, the busbar can also be easily pulled out of the steel retaining spring. In order to prevent the busbar from being unintentionally pulled off the busbar, a rear catch is provided on the housing of the busbar, which engages behind the busbar.

Aus der EP 1 898 436 A2 ist eine Steckvorrichtung zum Stecken auf eine elektrische Schaltvorrichtung bekannt, die gemäß dem Ausführungsbeispiel in Fig. 4 ein separates Gehäuseteil aufweist. In dem Gehäuseteil ist neben einem Leiteranschlusselement ein weiteres Federelement zur Kontaktierung einer Sammelschiene angeordnet. Auch bei diesem Federelement ist das freie Ende des die Sammelschiene kontaktierenden Schenkels von der Sammelschiene weggebogen, so dass der Schenkel die Sammelschiene mit einem abgerundeten Bereich kontaktiert. Dadurch kann das Gehäuseteil einfach und ohne Behinderungen sowohl auf die Sammelschiene aufgesteckt als auch wieder abgezogen werden. Damit das Gehäuseteil nicht ungewollt von der Sammelschiene abgezogen werden kann, weist das Gehäuseteil Rastelemente auf, über die es mit dem Gehäuse der Schaltvorrichtung verrastet werden kann.From the EP 1 898 436 A2 a plug-in device for plugging onto an electrical switching device is known, which according to the exemplary embodiment in FIG. 4 has a separate housing part. In addition to a conductor connection element, a further spring element for contacting a busbar is arranged in the housing part. In this spring element, too, the free end of the leg contacting the busbar is bent away from the busbar, so that the leg contacts the busbar with a rounded area. This allows the housing part easily and without hindrances can be plugged onto the busbar and removed again. So that the housing part cannot be unintentionally pulled off the busbar, the housing part has latching elements, via which it can be latched to the housing of the switching device.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Anschlussklemme zum Verbinden eines elektrischen Leiters mit einer Sammelschiene anzugeben, bei der sowohl die Befestigung der Anschlussklemme an einer Sammelschiene als auch das Lösen von einer Sammelschiene möglichst einfach erfolgt.The present invention is based on the object of specifying a connection terminal for connecting an electrical conductor to a busbar, in which both the attachment of the connection terminal to a busbar and the detachment from a busbar are as simple as possible.

Diese Aufgabe ist bei einer Anschlussklemme zum Verbinden eines elektrischen Leiters mit einer Sammelschiene mit den Merkmalen des Patentanspruchs 1 gelöst. Die Anschlussklemme weist ein Gehäuse auf, in dem ein Leiteranschlusselement und ein Strombalken angeordnet sind. In dem Gehäuse sind darüber hinaus eine Leitereinführungsöffnung zum Einführen des anzuschließenden elektrischen Leiters und eine Sammelschienenaufnahme zur Aufnahme der Sammelschiene ausgebildet. Ein mittels des Leiteranschlusselements angeschlossener Leiter ist dann über den Strombalken mit der in der Sammelschienenaufnahme angeordneten Sammelschiene elektrisch leitend verbunden.This object is achieved with a connecting terminal for connecting an electrical conductor to a busbar with the features of patent claim 1 . The connection terminal has a housing in which a conductor connection element and a current bar are arranged. In addition, a conductor insertion opening for inserting the electrical conductor to be connected and a busbar receptacle for accommodating the busbar are formed in the housing. A conductor connected by means of the conductor connection element is then electrically conductively connected via the current bar to the busbar arranged in the busbar receptacle.

Bei der Erfindung ist von besonderer Bedeutung, dass ein Federelement zur Fixierung der Sammelschiene vorgesehen ist, wobei das Federelement mindestens einen Schenkel aufweist und derart im Gehäuse angeordnet ist, dass das freie Ende des Schenkels in die Sammelschienenaufnahme hineinragt, wenn keine Sammelschiene in der Sammelschienenaufnahme angeordnet ist, während das Federelement entgegen seine Federkraft ausgelenkt ist, wenn eine Sammelschiene in der Sammelschienenaufnahme angeordnet ist. Das freie Ende des Schenkels des Federelements liegt dann unter einem spitzen Winkel α an der Sammelschiene an. Durch eine entsprechende Anordnung des Schenkels des Federelements kann so auf einfache Art und Weise der Winkel α festgelegt werden, wodurch eine ausreichend große Selbsthemmung erreicht und damit ein ungewolltes Abziehen der Anschlussklemme von der Sammelschiene entgegengesetzt zur Aufsteckrichtung sicher verhindert werden kann.In the case of the invention, it is of particular importance that a spring element is provided for fixing the busbar, the spring element having at least one leg and being arranged in the housing in such a way that the free end of the leg protrudes into the busbar receptacle when no busbar is arranged in the busbar receptacle is, while the spring element is deflected against its spring force when a busbar is arranged in the busbar receptacle. The free end of the leg of the spring element then rests against the busbar at an acute angle α. By appropriately arranging the leg of the spring element, the angle α can be set in a simple manner, thereby achieving sufficiently large self-locking and thus reliably preventing the connection terminal from being unintentionally removed from the busbar in the opposite direction to the direction of attachment.

Die Verwendung eines Federelements für die Fixierung der Sammelschiene hat dabei den Vorteil, dass das Federelement zum Einen das Einführen der Sammelschiene in die Sammelschienenaufnahme nicht merklich behindert, zum Anderen die Fixierung nach dem Einführen der Sammelschiene wirksam ist, ohne dass es einer Betätigung durch den Benutzer bedarf.The use of a spring element for fixing the busbar has the advantage that on the one hand the spring element does not noticeably impede the insertion of the busbar into the busbar receptacle, and on the other hand the fixation is effective after the busbar has been inserted without the user having to operate it requirement.

Gemäß einer bevorzugten Ausgestaltung ist das Federelement als Schenkelfeder ausgebildet, die zwei Schenkel aufweist, wobei sich der zweite Schenkel, der nicht in die Sammelschienenaufnahme hineinragt bzw. nicht mit der Sammelschiene in Berührung steht, als Anlageschenkel an einem Widerlager im Gehäuse abstützt. Dadurch kann die Halterung des Federelements im Gehäuse auf einfache Art und Weise erfolgen, wobei die Schenkelfeder zusätzlich durch entsprechende Rippen oder Haltedome im Gehäuse in ihrer Position festgelegt sein kann.According to a preferred embodiment, the spring element is designed as a leg spring which has two legs, the second leg, which does not protrude into the busbar receptacle or is not in contact with the busbar, being supported as a bearing leg on an abutment in the housing. As a result, the spring element can be held in the housing in a simple manner, with the leg spring also being able to be fixed in its position by corresponding ribs or holding domes in the housing.

Dadurch, dass zur Fixierung der Anschlussklemme an der Sammelschiene ein separates Federelement verwendet wird, dass mit dem Leiteranschlusselement nicht in einer Wechselwirkung steht, führt ein Lösen der Anschlussklemme von der Sammelschiene nicht gleichzeitig auch dazu, dass der an die Anschlussklemme angeschlossene Leiter gelöst wird. Vielmehr kann der Leiter an dem Leiteranschlusselement angeschlossen bleiben, wodurch das erneute Anschließen des Leiters nach dem Lösen der Anschlussklemme von der Sammelschiene entfällt.Because a separate spring element is used to fix the connection terminal to the busbar and does not interact with the conductor connection element, a release of the connection terminal from the busbar does not simultaneously result in the conductor connected to the connection terminal being released. Rather, the conductor can remain connected to the conductor connection element, which means that the conductor does not have to be reconnected after the connection terminal has been detached from the busbar.

Als Leiteranschlusselement kann grundsätzlich nahezu jede bekannte Art von Anschlusselementen, wie beispielsweise Schraubanschlüsse oder Zugfedern verwendet werden. Bevorzugt wird bei der erfindungsgemäßen Anschlussklemme als Leiteranschlusselement jedoch eine U-förmigen oder V-förmigen Schenkelfeder verwendet, die einen Anlageschenkel und einen Klemmschenkel aufweist, wobei der Klemmschenkel zusammen mit dem Strombalken eine Federkraftklemmstelle für den anzuschließenden, abisolierten Leiter bildet. Mit einer derartigen Schenkelfeder kann ein starrer Leiter oder ein mit einer Aderendhülse versehener Leiter direkt, d. h. ohne dass die Klemmstelle vorher mit einem Werkzeug geöffnet werden muss, in die Klemmstelle eingesteckt werden. Die Schenkelfeder wirkt dabei als Druckfeder, die den anzuschließenden Leiter mit dem Klemmschenkel gegen den Strombalken drückt. Somit kann sowohl die Fixierung der Anschlussklemme auf einer Sammelschiene als auch der Anschluss eines Leiters an die Anschlussklemme sehr einfach erfolgen, ohne dass dazu die Verwendung eines Werkzeugs erforderlich ist.In principle, almost any known type of connection element, such as screw connections or tension springs, can be used as the conductor connection element. However, a U-shaped or V-shaped torsion spring is preferably used as the conductor connection element in the connection terminal according to the invention, which has a contact leg and a clamping leg, the clamping leg together with the current bar forming a spring-loaded clamping point for the stripped conductor to be connected. With such a torsion spring, a rigid conductor or a conductor provided with a ferrule can be inserted directly into the terminal point, ie without the terminal point having to be opened with a tool beforehand. The torsion spring acts as a compression spring that presses the conductor to be connected with the clamping leg against the current bar. Consequently both the fixing of the connection terminal on a busbar and the connection of a conductor to the connection terminal can be carried out very easily without the use of a tool being required.

Zum Lösen eines angeschlossenen Leiters aus der Klemmstelle muss der Klemmschenkel der Schenkelfeder ausgelenkt werden, wozu im Gehäuse zusätzlich zur Leitereinführungsöffnung eine Betätigungsöffnung zum Einstecken der Spitze eines Werkzeugs, beispielsweise eines Schraubendrehers, ausgebildet sein kann. Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Anschlussklemme ist anstelle einer Betätigungsöffnung für ein Werkzeug ein Betätigungsdrücker verschiebbar im Gehäuse angeordnet. Der Betätigungsdrücker kann dabei aus einer ersten Position, in der der Klemmschenkel der Schenkelfeder nicht ausgelenkt ist, in eine zweite Position verschoben werden, in der der Klemmschenkel durch die Spitze des Betätigungsdrückers ausgelenkt wird, so dass ein angeschlossener elektrischer Leiter aus der Klemmstelle und damit auch aus der Leitereinführungsöffnung herausgezogen werden kann.To release a connected conductor from the clamping point, the clamping leg of the leg spring must be deflected, for which purpose an actuation opening for inserting the tip of a tool, for example a screwdriver, can be formed in the housing in addition to the conductor entry opening. According to a preferred embodiment of the connection terminal according to the invention, an actuating push-button is slidably arranged in the housing instead of an actuating opening for a tool. The actuating button can be moved from a first position, in which the clamping arm of the torsion spring is not deflected, into a second position, in which the clamping arm is deflected by the tip of the actuating button, so that a connected electrical conductor can be removed from the terminal point and thus also can be pulled out of the conductor entry opening.

Damit die erfindungsgemäße Anschlussklemme trotz des der Fixierung der Sammelschiene dienenden Federelemets von der Sammelschiene abgehoben bzw. die Sammelschiene aus der Sammelschienenaufnahme herausgezogen werden kann, ist es erforderlich, dass der Schenkel des Federelement von der fixierten Sammelschiene abgehoben wird, indem der Schenkel entgegen der Federkraft des Federelements ausgelenkt wird. Dies kann mit Hilfe eines geeigneten Werkzeugs, beispielsweise der Spitze eines Schraubendrehers erfolgen, die in eine entsprechende Öffnung im Gehäuse eingesteckt wird und dann den Schenkel des Federelements auslenkt.So that the connection terminal according to the invention can be lifted off the busbar or the busbar can be pulled out of the busbar receptacle despite the spring element serving to fix the busbar, it is necessary for the leg of the spring element to be lifted off the fixed busbar by pushing the leg against the spring force of the Spring element is deflected. This can be done using a suitable tool, for example the tip of a screwdriver, which is inserted into a corresponding opening in the housing and then deflects the leg of the spring element.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist die Anschlussklemme jedoch ein Entriegelungselement auf, das beweglich am oder im Gehäuse angeordnet, so dass es aus einer Grundstellung in eine Entriegelungsstellung verbracht werden kann. In der Entriegelungsstellung wird der Schenkel des Federelements, der der Sammelschiene zugewandt ist und die Sammelschiene in ihrer Position fixiert, durch das Entriegelungselement so ausgelenkt, dass das freie Ende des Schenkels nicht mehr an der Sammelschiene anliegt. Die Anschlussklemme kann dann entgegen der Aufsteckrichtung von der Sammelschiene abgehoben bzw. die Sammelschiene entgegen der Einsteckrichtung aus der Sammelschienenaufnahme herausgezogen werden. Durch die Verwendung eines entsprechenden Entriegelungselements wird die Entriegelung erleichtert, da das Entriegelungselement so angeordnet sein kann, dass es einfach von einem Monteur betätigt werden kann. Außerdem muss dann auch zur Entriegelung der Anschlussklemme von der Sammelschiene kein separates Werkzeug benutzt werden.According to an advantageous embodiment of the invention, however, the terminal has an unlocking element that is movably arranged on or in the housing, so that it can be moved from a basic position to an unlocked position. In the unlocked position, the leg of the spring element, which faces the busbar and fixes the busbar in its position, is deflected by the unlocking element in such a way that the free end of the leg no longer rests against the busbar. The terminal can then counter to the push-on direction lifted off the busbar or the busbar can be pulled out of the busbar holder in the opposite direction to the insertion direction. Unlocking is facilitated by using a corresponding unlocking element, since the unlocking element can be arranged in such a way that it can be easily actuated by a fitter. In addition, no separate tool then has to be used to unlock the connection terminal from the busbar.

Grundsätzlich kann das Entriegelungselement - ähnlich wie der Betätigungsdrücker - verschiebbar im Gehäuse angeordnet sein. Vorzugsweise ist das Entriegelungselement jedoch als Hebel ausgebildet, der über ein Scharnier am Gehäuse verschwenkbar befestigt ist, wobei das Entriegelungselement eine Grifffläche zur Betätigung mit einem Finger aufweist. Dadurch ist die Betätigung des Entriegelungselements von einem Monteur sehr einfach durchführbar, indem er beim Abheben der Anschlussklemme von der Sammelschiene einfach mit einem Finger auf die Grifffläche des Hebels drückt, wodurch der Hebel verschwenkt wird, so dass der Schenkel des Federelements ausgelenkt und dadurch die Fixierung der Anschlussklemme an der Sammelschiene gelöst wird.In principle, the unlocking element--similar to the actuating push-button--can be slidably arranged in the housing. However, the unlocking element is preferably in the form of a lever which is pivotably attached to the housing via a hinge, the unlocking element having a gripping surface for actuation with a finger. As a result, the actuation of the unlocking element can be carried out very easily by a fitter by simply pressing the gripping surface of the lever with a finger when lifting the connection terminal from the busbar, as a result of which the lever is pivoted so that the leg of the spring element is deflected and thus the fixation the connection terminal on the busbar is released.

Zur Halterung und Positionierung der Sammelschiene in der Sammelschienenaufnahme weist die erfindungsgemäße Anschlussklemme vorzugsweise einen Klemmhebel auf, der auf der dem Strombalken gegenüberliegenden Seite der Sammelschienenaufnahme im Gehäuse drehbar gelagert ist. Der Klemmhebel weist mindestens eine in die Sammelschienenaufnahme hineinragende Klemmnase auf, die bei einer in der Sammelschienenaufnahme angeordneten Sammelschiene an der dem Strombalken abgewandten Seite der Sammelschiene an dieser anliegt. Eine in der Sammelschienenaufnahme angeordnete Sammelschiene wird dabei durch den Klemmhebel gegen den Strombalken gedrückt und zwischen dem Strombalken und der Klemmnase des Klemmhebels eingeklemmt, so dass die Sammelschiene gleichzeitig auch in der Sammelschienenaufnahme gehalten wird.In order to hold and position the busbar in the busbar receptacle, the connection terminal according to the invention preferably has a clamping lever which is rotatably mounted in the housing on the side of the busbar receptacle opposite the current bar. The clamping lever has at least one clamping lug which protrudes into the busbar receptacle and which, when the busbar is arranged in the busbar receptacle, bears against the busbar on the side of the busbar which is remote from the current bar. A busbar arranged in the busbar holder is pressed against the current bar by the clamping lever and clamped between the current bar and the clamping lug of the clamping lever, so that the busbar is also held in the busbar holder at the same time.

Zusätzlich zur mindestens einen Klemmnase weist der Klemmhebel vorzugsweise noch einen Betätigungsvorsprung auf, dessen freies Ende einen größeren Abstand vom Drehpunkt des Klemmhebels aufweist als die Klemmnase, so dass der Betätigungsvorsprung - bei nicht eingeführter Sammelschiene - weiter in die Sammelschienenaufnahme hineinragt als die Klemmnase. Beim Aufstecken der Anschlussklemme mit der Sammelschienenaufnahme auf eine Sammelschiene bzw. beim Einstecken der Sammelschiene in die Sammelschienenaufnahme wird dann der Klemmhebel automatisch verschwenkt, bis die Sammelschiene vollständig in der Sammelschienenaufnahme angeordnet ist, und die Sammelschiene zwischen der Klemmnase und dem Strombalken eingeklemmt ist.In addition to the at least one clamping lug, the clamping lever preferably also has an actuating projection, the free end of which is at a greater distance from the pivot point of the clamping lever than the clamping lug, so that the actuating projection--when the busbar is not inserted--protrudes further into the busbar receptacle than the clamping lug. When plugging the connection terminal with the busbar holder onto a busbar or when inserting the busbar into the busbar holder, the clamping lever is then automatically swiveled until the busbar is completely arranged in the busbar holder and the busbar is clamped between the terminal lug and the current bar.

Gemäß einer weiteren vorteilhaften Ausgestaltung der erfindungsgemäßen Anschlussklemme ist der Strombalken verschiebbar im Gehäuse gelagert, und ein weiteres Federelement derart im Gehäuse angeordnet, dass das Federelement den Strombalken mit einer Kraft in Richtung der Sammelschienenaufnahme beaufschlagt. Durch das weitere Federelement wird gewährleistet, dass stets eine ausreichende und weitestgehend gleichbleibende Kontaktkraft zwischen dem Strombalken und einer in der Sammelschienenaufnahme eingeführten Sammelschiene besteht, so dass ein guter elektrischer Kontakt zwischen den Strombalken und der Sammelschiene gewährleistet ist, auch wenn die Dicke der verwendeten Sammelschiene gewisse Toleranzen aufweist.According to a further advantageous embodiment of the terminal according to the invention, the current bar is slidably mounted in the housing, and a further spring element is arranged in the housing such that the spring element applies a force to the current bar in the direction of the busbar receptacle. The additional spring element ensures that there is always a sufficient and largely constant contact force between the current bar and a busbar inserted in the busbar receptacle, so that good electrical contact between the current bar and the busbar is guaranteed, even if the thickness of the busbar used is certain has tolerances.

Bevorzugt ist auch das weitere Federelement als im wesentlichen U-förmige oder V-förmige Schenkelfeder ausgebildet, die zwei Schenkel aufweist. Der erste Schenkel stützt sich dabei als eine Art Anlageschenkel an einem Widerlager im Gehäuse ab, während der zweite Schenkel mit dem Strombalken in Kontakt ist. Der Kontakt zwischen dem zweiten Schenkel der Schenkelfeder und dem Strombalken kann dabei dadurch realisiert sein, dass der zweite Schenkel der Schenkelfeder mit seinem freien Ende in eine entsprechende Ausnehmung im Strombalken eingreift. Dadurch ist der zweite Schenkel mit dem Strombalken formschlüssig verbunden, so dass sich die Position des freien Endes des zweiten Schenkels zum Strombalken nicht verändert.The further spring element is preferably also designed as a substantially U-shaped or V-shaped leg spring which has two legs. The first leg is supported as a kind of contact leg on an abutment in the housing, while the second leg is in contact with the current bar. The contact between the second leg of the leg spring and the current bar can be realized in that the second leg of the leg spring engages with its free end in a corresponding recess in the current bar. As a result, the second leg is positively connected to the current bar, so that the position of the free end of the second leg in relation to the current bar does not change.

Gemäß einer bevorzugten, weil konstruktiv besonders einfach zu realisierenden Ausgestaltung liegt der zweite Schenkel der Schenkelfeder einfach an dem der Sammelschienenaufnahme abgewandten Ende des Strombalkens an bzw. das Ende des Strombalkens drückt direkt gegen den zweiten Schenkel der Schenkelfeder. Auf die Ausbildung einer Ausnehmung im Strombalken kann dabei verzichtet werden. Bei dieser Ausgestaltung ist die Schenkelfeder mit ihren beiden Schenkeln zwischen dem Widerlager im Gehäuse und dem Strombalken eingespannt, wobei die Schenkelfeder zusätzlich durch entsprechende Rippen oder Haltedome im Gehäuse in ihrer Position gesichert sein kann.According to a preferred embodiment, because it is structurally particularly easy to implement, the second leg of the leg spring simply rests against the end of the current bar facing away from the busbar receptacle or the end of the current bar presses directly against the second leg of the leg spring. On the formation of a recess in the current bar can be omitted. In this embodiment, the torsion spring is clamped with its two legs between the abutment in the housing and the current bar, and the torsion spring can also be secured in its position by corresponding ribs or retaining domes in the housing.

Ist in die Sammelschienenaufnahme eine Sammelschiene eingesteckt, so wird der Strombalken aus seiner Grundposition etwas in Richtung der Schenkelfeder gedrückt, wodurch die Schenkelfeder entgegen ihrer Federkraft zusammengedrückt wird. Aus der Federkraft der Schenkelfeder resultiert dann die Kraft, mit der der Strombalken gegen die Sammelschiene gedrückt wird, so dass ein guter elektrischer Kontakt zwischen dem Strombalken und der Sammelschiene gewährleistet ist.If a busbar is plugged into the busbar receptacle, the current bar is pressed slightly out of its basic position in the direction of the torsion spring, as a result of which the torsion spring is compressed against its spring force. The force with which the current bar is pressed against the busbar then results from the spring force of the torsion spring, so that a good electrical contact between the current bar and the busbar is ensured.

Im Einzelnen gibt es nun eine Vielzahl von Möglichkeiten, die erfindungsgemäße Anschlussklemme auszugestalten und weiterzubilden. Dazu wird verwiesen sowohl auf die dem Patentanspruch 1 nachgeordneten Patentansprüche als auch auf die nachfolgende Beschreibung eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung. In der Zeichnung zeigen

Fig. 1
ein Ausführungsbeispiel der Anschlussklemme ohne Sammel-schiene, einmal in perspektivischer Darstellung und einmal in Seitenansicht,
Fig. 2
die Anschlussklemme gemäß Fig. 1, aufgesetzt auf eine Sammel-schiene, mit einem Entriegelungselement in der Grundstellung, in perspektivischer Darstellung und in Seitenansicht, und
Fig. 3
die Anschlussklemme gemäß Fig. 2, mit Entriegelungselement in der Entriegelungsstellung, wiederum in perspektivischer Darstel-lung und in Seitenansicht.
In detail, there are now a large number of possibilities for designing and developing the connection terminal according to the invention. Reference is made both to the patent claims subordinate to patent claim 1 and to the following description of a preferred exemplary embodiment in conjunction with the drawing. Show in the drawing
1
an embodiment of the connection terminal without busbar, once in a perspective view and once in a side view,
2
the terminal according to 1 , placed on a busbar, with an unlocking element in the basic position, in a perspective view and in a side view, and
3
the terminal according to 2 , with the unlocking element in the unlocked position, again in a perspective representation and in a side view.

Die Figuren zeigen ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Anschlussklemme 1 zum Verbinden eines - hier nicht dargestellten - elektrischen Leiters mit einer Sammelschiene 2. Während in Fig. 1 die Anschlussklemme 1 ohne Sammelschiene 2 dargestellt ist, zeigen die Fig. 2 und 3 die Anschlussklemme 1 mit Sammelschienen 2. In Fig. 3 ist die Anschlussklemme 1 zwar noch mit der Sammelschiene 2 verbunden, im Unterschied zur Darstellung gemäß Fig. 2 ist jedoch die zwischen der Anschlussklemme 1 und der Sammelschiene 2 ausgebildete Fixierung gelöst, so dass die Anschlussklemme 1 von der Sammelschiene 2 entgegen der Aufsteckrichtung A abgehoben werden kann.The figures show a preferred embodiment of a terminal 1 according to the invention for connecting a - not shown here - electrical conductor with a busbar 2. While in 1 the terminal 1 is shown without busbar 2, show the 2 and 3 the connection terminal 1 with busbars 2. In 3 the terminal 1 is still connected to the busbar 2, in contrast to the representation according to FIG 2 However, the fixation formed between the connecting terminal 1 and the busbar 2 is released, so that the connecting terminal 1 can be lifted off the busbar 2 counter to the direction A being attached.

Die erfindungsgemäße Anschlussklemme 1 weist ein Gehäuse 3 auf, in dem ein Leiteranschlusselement 4 in Form einer Schenkelfeder und ein L-förmiger Strombalken 5 angeordnet sind. Zum Einführen eines anzuschließenden Leiters in die Klemmstelle ist in dem Gehäuse 3 eine Leitereinführungsöffnung 6 ausgebildet. Darüber hinaus weist das in der Regel aus Kunststoff bestehende Gehäuse 3 noch eine Sammelschienenaufnahme 7 auf, die einseitig offen ist, so dass die Anschlussklemme 1 auf eine ggf. bereits montierte Sammelschiene 2 mit der Sammelschienenaufnahme 7 in Aufsteckrichtung A aufgesteckt bzw. aufgesetzt werden kann. Ist die Anschlussklemme 1 montiert, so kann die Sammelschiene 2 aus der zur Aufsteckrichtung A entgegengesetzten Richtung in die Sammelschienenaufnahme 7 eingesteckt werden.The connection terminal 1 according to the invention has a housing 3 in which a conductor connection element 4 in the form of a torsion spring and an L-shaped current bar 5 are arranged. A conductor insertion opening 6 is formed in the housing 3 for inserting a conductor to be connected into the terminal point. In addition, the housing 3, which is usually made of plastic, also has a busbar receptacle 7 that is open on one side, so that the connecting terminal 1 can be plugged or placed onto a busbar 2 that may already be installed, with the busbar receptacle 7 in the plugging direction A. If the connection terminal 1 is installed, the busbar 2 can be inserted into the busbar receptacle 7 from the direction opposite to the plug-on direction A.

Zur Fixierung der Sammelschiene 2 in der Sammelschienenaufnahme 7 ist ein Federelement 8 im Gehäuse 3 der Anschlussklemme 1 angeordnet, das einen ersten Schenkel 9 aufweist, dessen freies Ende 10 in die Sammelschienenaufnahme 7 hineinragt, wenn keine Sammelschiene 2 in der Sammelschienenaufnahme 7 angeordnet ist, so wie dies in Fig. 1a und 1b dargestellt ist. Das Federelement 8 ist als Schenkelfeder ausgebildet, so dass es neben dem ersten Schenkel 9 noch einen zweiten Schenkel 11 aufweist, der als Anlageschenkel fungiert und sich an einem Widerlager 12 im Gehäuse 3 abstützt.To fix the busbar 2 in the busbar receptacle 7, a spring element 8 is arranged in the housing 3 of the connecting terminal 1, which has a first leg 9, the free end 10 of which protrudes into the busbar receptacle 7, if no busbar 2 is arranged in the busbar receptacle 7, see above like this in Figures 1a and 1b is shown. The spring element 8 is designed as a leg spring, so that in addition to the first leg 9 it also has a second leg 11 which acts as a contact leg and is supported on an abutment 12 in the housing 3 .

Wird das Gehäuse 3 der Anschlussklemme 1 in Aufsteckrichtung A auf eine Sammelschiene 2 aufgesteckt, so wird der Schenkel 9 entgegen der Federkraft des Federelements 8 durch die Sammelschiene 2 ausgelenkt, so dass die Sammelschiene 2 an dem freien Ende 10 des Schenkels 9 vorbeigleiten kann. Ist die Anschlussklemme 1 bzw. das Gehäuse 3 vollständig auf die Sammelschiene 2 aufgesteckt, so wie dies in Fig. 2 dargestellt ist, so liegt das freie Ende 10 des Schenkels 9 unter einem spitzen Winkel α an der dem Federelement 8 zugewandten Seite der Sammelschiene 2 an dieser an. Hierdurch wird die Sammelschiene 2 in der Sammelschienenaufnahme 7 fixiert und somit ein ungewolltes Abziehen des Gehäuses 3 von der Sammelschiene 2 oder ein ungewolltes Herausziehen der Sammelschiene 2 aus der Sammelschienenaufnahme 7 verhindert.If the housing 3 of the connection terminal 1 is pushed onto a busbar 2 in the push-on direction A, the leg 9 is deflected by the busbar 2 against the spring force of the spring element 8, so that the busbar 2 can slide past the free end 10 of the leg 9. If the connection terminal 1 or the housing 3 is fully plugged onto the busbar 2, as shown in 2 is shown, the free end 10 of the leg 9 rests at an acute angle α on the side of the busbar 2 facing the spring element 8 . This will create the busbar 2 is fixed in the busbar receptacle 7, thus preventing the housing 3 from being unintentionally pulled off the busbar 2 or the busbar 2 being unintentionally pulled out of the busbar receptacle 7.

Soll die Anschlussklemme 1 gewollt von der in der Sammelschienenaufnahme 7 angeordneten Sammelschiene 2 abgezogen werden, so muss die durch das Federelement 8 erzeugte Fixierung gelöst werden, indem der Schenkel 9 entgegengesetzt zur Federkraft des Federelements 8 ausgelenkt wird. Hierzu könnte beispielsweise die Spitze eines Schraubendrehers benutzt werden, die dann auf der dem Federelement 8 zugewandten Seite der Sammelschiene 2 in eine entsprechende Öffnung im Gehäuse 3 eingesteckt werden müsste.If the connection terminal 1 is to be intentionally removed from the busbar 2 arranged in the busbar receptacle 7 , the fixation created by the spring element 8 must be released by the leg 9 being deflected in the opposite direction to the spring force of the spring element 8 . For this purpose, for example, the tip of a screwdriver could be used, which would then have to be inserted into a corresponding opening in the housing 3 on the side of the busbar 2 facing the spring element 8 .

Bei dem in den Figuren dargestellten bevorzugten Ausführungsbeispiel der erfindungsgemäßen Anschlussklemme 1 ist zum Lösen der Fixierung durch das Federelement 8 ein Entriegelungselement 13 vorgesehen, das eine ins Innere des Gehäuses 3 ragende Betätigungsnase 14 aufweist und über ein Scharnier 15 am Gehäuse 3 beweglich angeordnet ist. Das als Hebel ausgebildete etwa L-förmige Entriegelungselement 13 weist eine Grifffläche 16 auf, auf die ein Monteur zur Betätigung des Entriegelungselements 13 nur mit einem Finger drücken muss, wodurch dann die Betätigungsnase 14 gegen den Schenkel 9 des Federelements 8 drückt und diesen dadurch von der Sammelschiene 2 abhebt. Diese Entriegelungsstellung, in der das Entriegelungselement 13 betätigt ist, ist in Fig. 3 dargestellt, während die Fig. 1 und 2 das Entriegelungselement 13 in der Grundstellung zeigen, in der es nicht betätigt ist. Befindest sich das Entriegelungselement 13 in der Entriegelungsstellung, so kann die Anschlussklemme 1 einfach - und ohne dass es weiterer Handgriffe oder der Benutzung eines Werkzeugs bedarf - von der Sammelschiene 2 abgehoben werden. Soll nicht die Anschlussklemme 1 von einer festgelegten Sammelschiene 2 abgehoben sondern die Sammelschiene 2 aus der Sammelschienenaufnahme 7 der Anschlussklemme 1 herausgezogen werden, so ist dies ebenfalls einfach möglich, indem das Entriegelungselement 13 betätigt wird.In the preferred exemplary embodiment of the connection terminal 1 according to the invention shown in the figures, an unlocking element 13 is provided for releasing the fixation by the spring element 8, which has an actuating lug 14 protruding into the interior of the housing 3 and is movably arranged on the housing 3 via a hinge 15. The approximately L-shaped unlocking element 13 designed as a lever has a gripping surface 16, which an installer only has to press with one finger to actuate the unlocking element 13, whereby the actuating lug 14 then presses against the leg 9 of the spring element 8 and thereby separates it from the Busbar 2 stands out. This unlocked position, in which the unlocking element 13 is actuated, is in 3 shown while the 1 and 2 show the unlocking element 13 in the basic position in which it is not actuated. If the unlocking element 13 is in the unlocked position, the connecting terminal 1 can be lifted off the busbar 2 easily—and without the need for further manipulation or the use of a tool. If the connection terminal 1 is not to be lifted off a fixed busbar 2 but instead the busbar 2 is to be pulled out of the busbar receptacle 7 of the connection terminal 1 , this is also easily possible by actuating the unlocking element 13 .

Bei dem in den Figuren dargestellten Ausführungsbeispiel der erfindungsgemäßen Anschlussklemme 1 ist das Leiteranschlusselement 4 als Schenkelfeder ausgebildet, die einen Anlageschenkel 17 und einen Klemmschenkel 18 aufweist. Ein durch die Leitereinführungsöffnung 6 in das Gehäuse 3 eingeführter abisolierter elektrischer Leiter wird dabei durch den Klemmschenkel 18 gegen den Schenkel 19 des Strombalkens 5 gedrückt, der mit seiner gegenüberliegenden Seite an der in der Sammelschienenaufnahme 7 angeordneten Sammelschiene 2 anliegt. Der Klemmschenkel 18 bildet somit zusammen mit dem Schenkel 19 des Strombalkens 5 eine Federkraftklemmstelle für den anzuschließenden Leiter.In the exemplary embodiment of the connection terminal 1 according to the invention shown in the figures, the conductor connection element 4 is designed as a leg spring which has a contact leg 17 and a clamping leg 18 . A stripped electrical conductor introduced through the conductor entry opening 6 into the housing 3 is pressed by the clamping limb 18 against the limb 19 of the current bar 5 , the opposite side of which bears against the busbar 2 arranged in the busbar receptacle 7 . The clamping leg 18 thus forms, together with the leg 19 of the current bar 5, a spring force clamping point for the conductor to be connected.

Um einen angeschlossenen Leiter wieder aus der Anschlussklemme 1 herausziehen zu können, muss die Klemmstelle geöffnet werden, wozu der Klemmschenkel 18 in Richtung des Anlageschenkels 17 ausgelenkt und damit von dem angeschlossenen und geklemmten Leiter abgehoben werden muss. Hierzu weist die Anschlussklemme 1 einen im Gehäuse 3 verschiebbar angeordneten Betätigungsdrücker 20 auf, der aus einer ersten, in den Figuren dargestellten Position, in eine zweite Position innerhalb des Gehäuses 3 verschoben werden kann. In der ersten Position des Betätigungsdrückers 20 ist dabei der Klemmschenkel 18 nicht ausgelenkt, während der Klemmschenkel 18 in der zweiten Position des Betätigungsdrückers 20 soweit ausgelenkt ist, dass ein angeschlossener Leiter nicht mehr in der Klemmstelle zwischen dem Klemmschenkel 18 und dem Schenkel 19 des Strombalkens 5 festgeklemmt ist. Der Leiter kann dann einfach durch die Leitereinführungsöffnung 6 aus dem Gehäuse 3 der Anschlussklemme 1 herausgezogen werden.In order to be able to pull a connected conductor out of the terminal 1 again, the clamping point must be opened, for which purpose the clamping leg 18 must be deflected in the direction of the contact leg 17 and thus lifted off the connected and clamped conductor. For this purpose, the connection terminal 1 has an actuating push-button 20 which is displaceably arranged in the housing 3 and which can be displaced from a first position shown in the figures into a second position within the housing 3 . In the first position of the actuating pushbutton 20, the clamping leg 18 is not deflected, while in the second position of the actuating pushbutton 20 the clamping leg 18 is deflected to such an extent that a connected conductor is no longer in the clamping point between the clamping leg 18 and the leg 19 of the current bar 5 is stuck. The conductor can then simply be pulled out of the housing 3 of the connection terminal 1 through the conductor insertion opening 6 .

Zur Positionierung und Halterung der Sammelschiene 2 in der Sammelschienenaufnahme 7 ist ein Klemmhebel 21 auf der dem Strombalken 5 gegenüberliegenden Seite der Sammelschienenaufnahme 7 drehbar im Gehäuse 3 gelagert. Der Klemmhebel 21 weist zwei Klemmnasen 22, 23 auf, mit denen Sammelschienen 2 mit unterschiedlicher Dicke in der Sammelschienenaufnahme 7 gehalten und gegen den Strombalken 5 gedrückt werden können.To position and hold the busbar 2 in the busbar receptacle 7 , a clamping lever 21 is rotatably mounted in the housing 3 on the side of the busbar receptacle 7 opposite the current bar 5 . The clamping lever 21 has two clamping lugs 22, 23, with which busbars 2 of different thickness can be held in the busbar receptacle 7 and pressed against the current bar 5.

Wie insbesondere aus den Fig. 1a und 1b ersichtlich ist, weist der Klemmhebel 21 darüber hinaus noch einen Betätigungsvorsprung 24 auf, dessen freies Ende einen größeren Abstand vom Drehpunkt des Klemmhebels 21 hat als die erste Klemmnase 22, welche wiederum einen größeren Abstand zum Drehpunkt aufweist als die zweite Klemmnase 23. Der Betätigungsvorsprung 24 ragt somit bei freier Sammelschienenaufnahme 7 am weitesten in die Sammelschienenaufnahme 7 hinein. Beim Aufstecken des Gehäuses 3 auf eine Sammelschiene 2 stößt diese zunächst am Betätigungsvorsprung 24 an, wodurch der Klemmhebel 21 entgegengesetzt zum Uhrzeigersinn verschwenkt wird, bis das Gehäuse 3 vollständig auf der Sammelschiene 2 aufgesetzt ist. Wie aus Fig. 2 ersichtlich ist, liegt dann die Klemmnase 22 an der Sammelschiene 2 an, wodurch diese gegen den Strombalken 5 gedrückt und in der Sammelschienenaufnahme 7 gehalten wird.As in particular from the Figures 1a and 1b As can be seen, the clamping lever 21 also has an actuating projection 24, the free end of which is at a greater distance from the fulcrum of the clamping lever 21 than the first clamping lug 22, which in turn is at a greater distance from the fulcrum than the second clamping lug 23. The actuating projection 24 thus protrudes furthest into the busbar receptacle when the busbar receptacle 7 is free 7 in. When the housing 3 is plugged onto a busbar 2, the busbar first hits the actuating projection 24, as a result of which the clamping lever 21 is pivoted counterclockwise until the housing 3 is completely placed on the busbar 2. How out 2 As can be seen, the clamping lug 22 then rests against the busbar 2 , as a result of which it is pressed against the current bar 5 and held in the busbar receptacle 7 .

Bei der in den Figuren dargestellten bevorzugten Ausgestaltung der erfindungsgemäßen Anschlussklemme 1 ist neben dem die Sammelschiene 2 fixierenden Federelement 8 noch ein weiteres, ebenfalls als Schenkelfeder ausgebildetes Federelement 25 im Gehäuse 3 angeordnet. Das Federelement 25 befindet sich dabei auf der der Sammelschienenaufnahme 7 abgewandten Seite des Strombalkens 5, wobei sich der erste Schenkel 26 des Federelements an einem Widerlager 27 im Gehäuse 3 abstützt und der zweite Schenkel 28 mit dem Strombalken 5 in Kontakt ist. Der Schenkel 28 liegt dabei direkt an dem der Sammelschienenaufnahme 7 abgewandten Ende 29 des Strombalkens 5 an, so dass das Federelement 25 den Strombalken 5 mit einer Kraft in Richtung der Sammelschienenaufnahme 7 beaufschlagt bzw. mit einer Kraft gegen eine eingeführte Sammelschiene 2 drückt.In the preferred embodiment of the connection terminal 1 according to the invention shown in the figures, in addition to the spring element 8 fixing the busbar 2 , another spring element 25 , also designed as a torsion spring, is arranged in the housing 3 . The spring element 25 is located on the side of the current bar 5 facing away from the busbar receptacle 7 , the first leg 26 of the spring element being supported on an abutment 27 in the housing 3 and the second leg 28 being in contact with the current bar 5 . The leg 28 rests directly on the end 29 of the current bar 5 facing away from the busbar receptacle 7, so that the spring element 25 applies a force to the current bar 5 in the direction of the busbar receptacle 7 or presses it against an inserted busbar 2 with a force.

Wie aus einem Vergleich der Fig. 1 und 2 ersichtlich ist, ist der Strombalken 5 - senkrecht zur Aufsteckrichtung A - verschiebbar im Gehäuse 3 gelagert. Bei der Darstellung gemäße Fig. 1, bei der keine Sammelschiene 2 in der Sammelschienenaufnahme 7 angeordnet ist, ist der L-förmige Strombalken 5 durch die Kraft des Federelements 25 bis zu dem im Gehäuse 3 ausgebildeten Anschlag 30 in Richtung der Sammelschienenaufnahme 7 - in der Darstellung nach links - verschoben. Im Unterschied dazu ist bei der Darstellung gemäße Fig. 2, bei dem eine Sammelschiene 2 in der Sammelschienenaufnahme 7 angeordnet ist, der Strombalken 5 durch die Sammelschiene 2 entgegen der Federkraft des Federelements 5 etwas von dem Anschlag 30 - in der Darstellung nach rechts - weggedrückt, wobei aufgrund der Federkraft des Federelements 25 eine definierte Kontaktkraft zwischen der Sammelschiene 2 und dem Strombalken 5 gegeben ist.As from a comparison of 1 and 2 As can be seen, the current bar 5 is slidably mounted in the housing 3 - perpendicular to the plug-on direction A. According to the presentation 1 , in which no busbar 2 is arranged in the busbar receptacle 7, the L-shaped current bar 5 is displaced by the force of the spring element 25 up to the stop 30 formed in the housing 3 in the direction of the busbar receptacle 7—to the left in the illustration. In contrast, in the presentation according 2 , in which a busbar 2 is arranged in the busbar receptacle 7, the current bar 5 is pushed away by the busbar 2 against the spring force of the spring element 5 somewhat from the stop 30 - to the right in the illustration, with a defined contact force due to the spring force of the spring element 25 is given between the busbar 2 and the current bar 5.

Claims (12)

  1. Connection terminal (1) for connecting an electrical conductor to a busbar (2), comprising a housing (3), a conductor connection element (4) and a current bar (5), wherein the housing (3) has a conductor insertion opening (6) for inserting the electrical conductor and a busbar receptacle (7) for receiving the busbar (2),
    wherein a spring element (8) having at least one leg (9) is arranged in the housing (3) such that the free end (10) of the leg (9) projects into the busbar receptacle (7) if no busbar (2 ) is arranged in the busbar receptacle (7), while the spring element (8) is deflected against its spring force when a busbar (2) is arranged in the busbar receptacle (7),
    characterized in
    that a conductor connected by means of the conductor connection element (4) can be electrically conductively connected via the current bar (5) to a busbar (2) arranged in the busbar receptacle (7), and
    that the free end (10) of the leg (9) then rests at an acute angle α against the busbar (2), so that the leg (9) of the spring element (8) must be lifted off the fixed busbar (2) in order to be able to pull the busbar (2) out of the busbar receptacle (7).
  2. Connection terminal (1) according to claim 1, characterized in that the spring element (8) is designed as a leg spring and has a second leg (11) which is supported on an abutment (12) in the housing (3).
  3. Connection terminal (1) according to claim 1 or 2, characterized in that an unlocking element (13) is movably arranged on or in the housing (3), which can be moved from a basic position into an unlocking position, wherein the leg (9) of the spring element (8) is deflected by the unlocking element (13) in the unlocked position so that the free end (10) of the leg (9) no longer rests against the side of the busbar (2), so that the connection terminal (1) can be lifted from the busbar (2) against the mounting direction A.
  4. Connection terminal (1) according to claim 3, characterized in that the unlocking element (13) has an actuating lug (14) and is designed as a lever which is fastened to the housing (3) via a hinge (15), wherein the unlocking element ( 13) preferably has a gripping surface (16) for actuation with a finger.
  5. Connection terminal (1) according to any one of claims 1 to 4, characterized in that the conductor connection element (4) is designed as a leg spring, which has an abutting leg (17) and a clamping leg (18), wherein, together with the current bar (5), the clamping leg (18) forms a spring force clamping point for the conductor to be connected.
  6. Connection terminal (1) according to any one of claims 1 to 5, characterized in that the current bar (5) is L-shaped, wherein a connected conductor rests against one side of the first leg (19) of the current bar (5) and a busbar (2) arranged in the busbar receptacle (7) rests against the opposite side of the first leg (19) of the current bar (5).
  7. Connection terminal (1) according to claim 5 or 6, characterized in that a push actuator (20) is arranged in a movable manner in the housing (3), which can be moved from a first position, in which the clamping leg (18) is not deflected, into a second position, in which the clamping leg (18) is deflected, so that a connected electrical conductor can be removed from the conductor insertion opening (6).
  8. Connection terminal according to any one of claims 1 to 7, characterized in that a clamping lever (21) is rotatably mounted in the housing (3) on the side of the busbar receptacle (7) opposite the current bar (5), wherein the clamping lever (21) has at least a clamping lug (22, 23) projecting into the busbar receptacle (7), which rests against the side of the busbar (2) facing away from the current bar (5) in the case of a busbar (2) arranged in the busbar receptacle (7).
  9. Connection terminal according to claim 8, characterized in that the clamping lever (21) has an actuating projection (24) whose free end has a greater distance from the pivot point of the clamping lever (21) than the clamping lug (22, 23), wherein the actuating projection (24) protrudes into the busbar receptacle (7) when no busbar (2) is arranged in the busbar receptacle (7).
  10. Connection terminal according to any one of claims 1 to 9, characterized in that the current bar (5) is mounted in a movable manner in the housing (3) and that a further spring element (25) is arranged in the housing (3) such that the spring element (25) acts upon the current bar (5) with a force in the direction of the busbar receptacle (7).
  11. Connection terminal according to claim 10, characterized in that the further spring element (25) is also designed as a leg spring having two legs (26, 28), wherein the first leg (26) is supported on an abutment (27) in the housing ( 3) and the second leg (28) is in contact with the current bar (5).
  12. Connection terminal according to claim 11, characterized in that the second leg (28) of the leg spring rests against the end (30) of the current bar (5) facing away from the busbar receptacle (7).
EP16734710.3A 2015-07-06 2016-07-06 Connection terminal Active EP3320583B1 (en)

Applications Claiming Priority (2)

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DE102015110874.7A DE102015110874A1 (en) 2015-07-06 2015-07-06 terminal
PCT/EP2016/065974 WO2017005790A1 (en) 2015-07-06 2016-07-06 Connection terminal

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EP3320583A1 EP3320583A1 (en) 2018-05-16
EP3320583B1 true EP3320583B1 (en) 2022-04-13

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EP (1) EP3320583B1 (en)
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DE (1) DE102015110874A1 (en)
WO (1) WO2017005790A1 (en)

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Also Published As

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DE102015110874A1 (en) 2017-01-12
WO2017005790A1 (en) 2017-01-12
CN107810579B (en) 2019-11-12
EP3320583A1 (en) 2018-05-16
CN107810579A (en) 2018-03-16

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