EP3044834B1 - Clamping spring - Google Patents

Clamping spring Download PDF

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Publication number
EP3044834B1
EP3044834B1 EP14759148.1A EP14759148A EP3044834B1 EP 3044834 B1 EP3044834 B1 EP 3044834B1 EP 14759148 A EP14759148 A EP 14759148A EP 3044834 B1 EP3044834 B1 EP 3044834B1
Authority
EP
European Patent Office
Prior art keywords
spring
clamping
limb
conductor
leg
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
EP14759148.1A
Other languages
German (de)
French (fr)
Other versions
EP3044834A1 (en
Inventor
Jürgen Feye-Hohmann
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
Original Assignee
Phoenix Contact GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP3044834A1 publication Critical patent/EP3044834A1/en
Application granted granted Critical
Publication of EP3044834B1 publication Critical patent/EP3044834B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/75—Coupling devices for rigid printing circuits or like structures connecting to cables except for flat or ribbon cables
    • 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
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • 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
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/4819—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end the spring shape allowing insertion of the conductor end when the spring is unbiased
    • H01R4/4823—Multiblade spring
    • 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
    • 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
    • H01R4/4846—Busbar details
    • H01R4/4848—Busbar integrally formed with the spring

Definitions

  • the present invention relates to a clamping spring for mounting on a printed circuit board and a printed circuit board with a conductor track and such a clamping spring.
  • the DE 10 2007 035 336 B3 shows a spring-loaded pressure clamp in which a conductor is insertable into a tubular opening.
  • a spring leg clamps the conductor to an inside of the tubular opening.
  • a tool is insertable to cancel a clamping of the conductor by the spring leg.
  • two guide slots are provided which are bounded by stop edges.
  • connection element for mounting on a printed circuit board, which comprises a first contact part with a clamping spring and a second contact part for the application of a conductor.
  • the Clamping spring has an actuating element in a side region for canceling the clamping.
  • a guide element for introducing a tool for actuating the actuating element a hole in a wall is provided.
  • the US 5,292,260 A discloses a contact device for electrical connection to a circuit board.
  • the contact device has a contact element with a straight arm and a bent arm.
  • a conductor is clamped between the first arm and the second arm, wherein the second arm acts as a spring leg. To release the spring leg, a tool is inserted into an opening.
  • the US6080008 discloses a clamping spring for mounting on a circuit board in which a conductor is insertable into a circular opening. Two spring legs clamp the conductor on an inner side of the clamping spring.
  • a cage spring with solder legs known that can be mounted on a circuit board.
  • the solder legs serve to position the cage spring on the circuit board.
  • the cage spring has proven itself in practice and their attachment to the PCB is easy. In practice, however, has been found to be desirable to improve the handling of the spring for the conductor assembly and disassembly. For the opening of the spring often an additional guide must be provided, which is associated with additional effort.
  • the invention is therefore based on the object to provide a clamping spring of the type mentioned above, which has a simple structure, is easy to manufacture and allows easy handling for insertion and / or removal of a conductor.
  • the clamping spring for mounting on a printed circuit board.
  • the clamping spring comprises a spring leg for clamping contacting a conductor, a contact region for contacting the printed circuit board, wherein the clamping spring is made in one piece, the spring leg has an actuating element for canceling the clamping, and the clamping spring has a guide element which is arranged such that between the Spring leg and the guide element, a tool for actuating the actuating element is insertable.
  • a circuit board is also provided with a conductor track and a clamping spring specified above, wherein the clamping spring is electrically conductively connected to the conductor track.
  • the basic idea of the present invention is therefore to configure the clamping spring in such a way that it itself enables guidance of a tool for actuating the spring leg.
  • the spring leg can be reliably operated, and slippage of the tool during actuation is avoided. Additional components for guiding the tool are not required.
  • the production of the clamping spring is simple because it is made in one piece.
  • the attachment of the clamping spring can be easily performed by a portion of the clamping spring is soldered to the circuit board.
  • the clamping spring is placed on a conductor track of the circuit board and soldered to it.
  • the clamping spring is placed with an area with a flat contact surface on the circuit board in order to perform the soldering reliably.
  • the clamping spring is preferably mounted on the circuit board in the SMT soldering process.
  • a solder paste is first applied to the circuit board, and the clamping spring placed on the solder paste, so that the clamping spring adheres to the circuit board.
  • a subsequent soldering step for example in a solder tunnel, the solder connection between the clamping spring and the circuit board is made, wherein the solder paste provides the solder for soldering.
  • the clamping spring in a connection region, can cover regions of the printed circuit board which do not have a conductor track, or the dimensions of the conductor track can go beyond the dimensions of the clamping spring in the connection region.
  • the design of the printed circuit board with printed conductors and optional other components is in principle arbitrary and without influence on the clamping spring and its connection to the circuit board.
  • the clamping can be done in different ways, with a counter-clamping element for clamping the conductor can be formed for example by a stop against which the inserted conductor is pressed by the clamping leg.
  • the clamping spring is made of an electrically conductive material.
  • the clamping spring on a steel material, particularly preferably spring steel, whereby a simple and reliable clamping of the conductor is made possible.
  • the clamping spring on a surface coating of a good electrically conductive material, so that the clamping spring has a good electrical conductivity.
  • the surface coating is preferably a galvanically applied copper layer, which is particularly preferably tin-plated.
  • the clamping spring can be easily soldered, for example in a reflow process.
  • the clamping spring is made of bronze.
  • the spring leg is preferably arranged and designed such that it has a clamping edge for contacting the inserted conductor. Particularly preferably, the spring leg is arranged such that it has an angle oblique to the insertion direction of the conductor. As a result, for example, form a clamping edge at its free end the contact.
  • the spring leg is further preferably arranged and designed such that it forms a drainage slope for the conductor. This facilitates the insertion of the conductor. An internal arrangement of the free end of the spring leg can facilitate the guidance of the tool.
  • a housing can be mounted over the clamping spring to realize a contact protection.
  • the housing is preferably inserted after soldering to the clamping spring.
  • the actuating element is arranged at a free end of the spring leg.
  • the spring leg itself can serve as a guide for the tool.
  • the actuating element is arranged on the spring leg at its side region transverse to its spring direction.
  • the spring leg can serve as a drainage slope, for example, without this function being impaired, for example, by the tool.
  • the operation can be done in a lateral area, so that a uniformly simple operation is ensured by the tool.
  • An impairment caused by different positions of the spring leg, for example due to an inserted conductor, is avoided.
  • an actuating element is arranged on each side region of the spring leg. As a result, a special orientation of the clamping spring for actuation is not required.
  • the clamping spring on a fixed clamping leg, wherein the conductor between the clamping leg and the spring leg is clamped.
  • the clamping leg thus serves as a counter-clamping element, against which the inserted conductor is pressed by the spring leg.
  • the clamping leg is preferably designed and arranged such that it has a clamping edge for clamping the inserted conductor.
  • the clamping edge is preferably formed by a free end of the clamping leg.
  • the clamping spring has a stop element which forms a stop for the clamping leg. Thereby, the clamping leg can be fixed in place so that it forms a fixed counter-clamping element, even if the clamping spring is made of an elastic material.
  • the clamping leg is biased against the stop element.
  • the clamping leg forms an insertion bevel for the conductor. This facilitates the insertion of the conductor.
  • the spring leg can form an insertion bevel for the conductor.
  • both the clamping leg and the spring leg form an insertion bevel for the conductor.
  • the two legs can thus form, for example, an insertion funnel.
  • the guide element is designed as a connecting element between the clamping leg and the spring leg.
  • the clamping spring may have a simple structure with few functional sections or components.
  • the clamping spring comprises two guide elements, which are each designed as a connecting element between the clamping leg and the spring leg.
  • the clamping leg and the spring leg can be connected to each other particularly reliable.
  • the two guide elements are arranged such that between the spring leg, the clamping leg and the two Guide elements an insertion region for insertion of the conductor is formed.
  • the clamping spring on its mounting side for positioning on the circuit board at least one soldering leg.
  • the Lötbein can be inserted into a bore of the circuit board to effect a reliable positioning of the clamping spring on the circuit board. Accordingly, the circuit board can be moved with the attached clamping spring before soldering, without the clamping spring can slip on the circuit board.
  • the bore of the circuit board is designed as a contact bore, so that a contacting of the circuit board takes place. The contacting can be done additionally or alternatively to the contacting by the attachment of the contact spring on the conductor track.
  • the clamping spring is designed as a sheet metal element and manufactured by punching and bending. This allows the provision of a clamping spring with a simple structure and a cost-effective production.
  • FIGS. 1 and 2 show a clamping spring 1 according to the invention according to a first preferred embodiment.
  • the clamping spring 1 is designed as a one-piece sheet metal element made of spring steel with an electroplated copper layering and tinning and made by punching and bending.
  • the clamping spring 1 comprises a fixed clamping leg 3, a spring leg 5 and two guide elements 7.
  • the guide elements 7 are designed as connecting elements, which are connected to one end 9 of the clamping leg 3 and one end 11 of the spring leg 5.
  • the clamping leg 3 is designed as a substantially elongated sheet metal element which is bent in the shape of an eyelet, so that its two ends 9, 13 come into contact with each other. As in detail in FIG. 1 is shown, the clamping leg 3 at its held end 9, a projection 15 which is designed as a stop element and forms a stop for the other, free end 13 of the clamping leg 3.
  • the spring leg 5 is designed as a substantially elongate sheet metal element which is bent in the shape of an open triangle substantially, so that its two Ends 11, 17 do not come into contact with each other.
  • the spring leg 5 on two actuators 27 which are arranged transversely to the spring direction of the spring leg 5 on both sides.
  • the actuators 27 are designed as lateral projections.
  • an insertion region 19 for inserting a conductor 21 is formed between the spring leg 5, the clamping leg 3 and the two guide elements 7, an insertion region 19 for inserting a conductor 21 is formed.
  • the conductor 21 is pressed in the inserted state of the spring leg 5 against clamping leg 3, so that the conductor 21 at the same time contacted the clamping spring 1 and is clamped therein.
  • a contact along a clamping edge 23 is formed both between the clamping leg 3 and the conductor 21 as well as between the spring leg 5 and the conductor 21 at the free end 13, 17 of the respective leg 3, 5.
  • Both the clamping leg 3 as well as the spring leg 5 form an insertion bevel for the conductor 19, whereby a total of an insertion funnel 25 is formed.
  • the clamping of the conductor 21 is in FIG. 2 shown.
  • the clamping spring 1 can be opened.
  • the tool may for example be designed as a flat-head screwdriver.
  • the tool is inserted between the spring leg 5 and one of the guide elements 7 until reaching the corresponding actuating element 27.
  • the guide elements 7 each have a bulge 29 for receiving the tool.
  • the spring leg 5 is elastically deformed, whereby the insertion region 19 is opened and the conductor 21 along the insertion funnel 25 can be inserted into the insertion area 19.
  • the tool can be removed, so that the spring leg 5 undergoes an elastic recovery and elastically clamps the conductor 21 between itself and the clamping leg 3 and contacted as described above.
  • the spring leg 5 is in turn elastically deformed, whereby the conductor 21 can be removed from the clamping spring 1.
  • the conductor can be inserted without tools in the clamping spring 1.
  • the conductor 21 is inserted into the insertion funnel 25 until it comes into contact with both legs 3, 5.
  • a force is exerted on the spring leg 5, whereby it is elastically deformed and the conductor 21 can be inserted into the insertion area 17.
  • the clamping and contacting of the conductor 21 in the clamping spring 1 takes place automatically at the end of the insertion process.
  • FIG. 3 shows the attachment of the clamping spring 1 on a printed circuit board 31.
  • the clamping spring 1 is executed on its underside 33 with two solder legs 35, with which the clamping spring 1 is positioned in through holes of the printed circuit board 31.
  • the clamping spring 1 is soldered to its underside 33 with a conductor track of the printed circuit board 31, whereby a mechanical and electrically conductive connection of the clamping spring is formed with the conductor track.
  • the underside 33 thus forms a contact region of the clamping spring.

Landscapes

  • Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Description

Die vorliegende Erfindung betrifft eine Klemmfeder zur Montage auf einer Leiterplatte sowie eine Leiterplatte mit einer Leiterbahn und einer solchen Klemmfeder.The present invention relates to a clamping spring for mounting on a printed circuit board and a printed circuit board with a conductor track and such a clamping spring.

Bei der Bestückung von Leiterplatten ist es heutzutage üblich, dass kleine und kleinste Bauteile automatisch gepickt und auf die Leiterplatte geklebt werden, um dann in einem Folgeprozess mit der Leiterplatte verlötet zu werden.In the assembly of printed circuit boards, it is common today for small and very small components to be picked automatically and glued to the printed circuit board in order to be subsequently soldered to the printed circuit board in a subsequent process.

Große Anschlussklemmen lassen sich oft nicht in diesen Prozess integrieren und werden nachträglich in Handlötung auf die Leiterplatte gebracht. Dieser Schritt ist mit hohen Kosten verbunden. Oft ist es lediglich erforderlich, einen einzelnen Leiter mit einer Leiterbahn der Leiterplatte oder mit einem Gerät zu verbinden, so dass für die Anschlussklemmen entwickelte automatische Verfahren nicht effizient durchgeführt werden können.Large terminals are often not integrated in this process and are subsequently transferred to the PCB by hand soldering. This step is associated with high costs. Often, it is only necessary to connect a single conductor to a printed circuit board trace or to a device so that automatic processes developed for the terminals can not be efficiently performed.

Die DE 10 2007 035 336 B3 zeigt eine Federkraftprintklemme, in der ein Leiter in eine röhrenförmige Öffnung einführbar ist. Ein Federschenkel klemmt den Leiter an einer Innenseite der röhrenförmigen Öffnung. Zwischen einer Außenwand der röhrenförmigen Öffnung und dem Federschenkel ist ein Werkzeug einführbar, um eine Klemmung des Leiters durch den Federschenkel aufzuheben. Zur Führung des Werkzeugs sind zwei Führungsschlitze vorgesehen, die von Anschlagkanten begrenzt werden.The DE 10 2007 035 336 B3 shows a spring-loaded pressure clamp in which a conductor is insertable into a tubular opening. A spring leg clamps the conductor to an inside of the tubular opening. Between an outer wall of the tubular opening and the spring leg, a tool is insertable to cancel a clamping of the conductor by the spring leg. To guide the tool two guide slots are provided which are bounded by stop edges.

Aus der US 6,056,585 A geht ein Anschlusselement zur Montage auf einer Leiterplatte hervor, das ein erstes Kontaktteil mit einer Klemmfeder und ein zweites Kontaktteil zur Anlage eines Leiters umfasst. Die Klemmfeder weist in einem Seitenbereich ein Betätigungselement auf zur Aufhebung der Klemmung. Als Führungselement zur Einführung eines Werkzeugs zur Betätigung des Betätigungselements ist ein Loch in einer Wand vorgesehen.From the US 6,056,585 A goes out a connection element for mounting on a printed circuit board, which comprises a first contact part with a clamping spring and a second contact part for the application of a conductor. The Clamping spring has an actuating element in a side region for canceling the clamping. As a guide element for introducing a tool for actuating the actuating element, a hole in a wall is provided.

Die US 5,292,260 A offenbart eine Kontakteinrichtung zur elektrischen Verbindung mit einer Leiterplatte. Die Kontakteinrichtung weist ein Kontaktelement mit einem geraden Arm und einem gebogenen Arm auf. Ein Leiter ist zwischen dem ersten Arm und dem zweiten Arm klemmbar, wobei der zweite Arm als Federschenkel fungiert. Zum Lösen des Federschenkels wird ein Werkzeug in eine Öffnung eingeführt.The US 5,292,260 A discloses a contact device for electrical connection to a circuit board. The contact device has a contact element with a straight arm and a bent arm. A conductor is clamped between the first arm and the second arm, wherein the second arm acts as a spring leg. To release the spring leg, a tool is inserted into an opening.

Die US6080008 offenbart eine Klemmfeder zur Montage auf einer Leiterplatte, in der ein Leiter in einen kreisförmige Öffnung einführbar ist. Zwei Federschenkel klemmen den Leiter an einer Innenseite der Klemmfeder.The US6080008 discloses a clamping spring for mounting on a circuit board in which a conductor is insertable into a circular opening. Two spring legs clamp the conductor on an inner side of the clamping spring.

Aus der DE 20 2009 006 254 U1 ist eine Klemme bekannt, die nach der Art eines Spreizdübels auf einer Leiterplatte befestigt wird. Auf der Leiterplatte befindet sich eine entsprechende durchkontaktierte Bohrung, deren Durchmesser an den Spreizdübel angepasst ist. Allerdings ist die Anbringung des Leiters aufwendig. Insbesondere das Lösen der Klemme von dem Leiter ist mit einem großen Aufwand verbunden.From the DE 20 2009 006 254 U1 a clamp is known, which is fastened in the manner of an expansion anchor on a printed circuit board. On the circuit board is a corresponding through-hole, the diameter of which is adapted to the expansion dowel. However, the attachment of the conductor is expensive. In particular, the release of the terminal from the conductor is associated with a great deal of effort.

Außerdem ist aus der DE 101 53 170 A1 eine Käfigfeder mit Lötbeinen bekannt, die auf einer Leiterplatte montiert werden kann. Die Lötbeine dienen dabei der Positionierung der Käfigfeder auf der Leiterplatte. Die Käfigfeder hat sich in der Praxis bewährt und ihre Anbringung auf der Leiterplatte ist einfach möglich. In der Praxis hat sich jedoch als wünschenswert herausgestellt, die Handhabung der Feder für die Leitermontage bzw. -demontage zu verbessern. Für das Öffnen der Feder muss häufig eine zusätzliche Führung vorgesehen werden, was mit zusätzlichem Aufwand verbunden ist.Moreover, from the DE 101 53 170 A1 a cage spring with solder legs known that can be mounted on a circuit board. The solder legs serve to position the cage spring on the circuit board. The cage spring has proven itself in practice and their attachment to the PCB is easy. In practice, however, has been found to be desirable to improve the handling of the spring for the conductor assembly and disassembly. For the opening of the spring often an additional guide must be provided, which is associated with additional effort.

Ausgehend von dem oben genannten Stand der Technik liegt der Erfindung somit die Aufgabe zugrunde, eine Klemmfeder der oben genannten Art anzugeben, die einen einfachen Aufbau aufweist, einfach herzustellen ist und eine einfache Handhabung zum Einführen und/oder Entfernen eines Leiters ermöglicht.Based on the above-mentioned prior art, the invention is therefore based on the object to provide a clamping spring of the type mentioned above, which has a simple structure, is easy to manufacture and allows easy handling for insertion and / or removal of a conductor.

Die Lösung der Aufgabe erfolgt erfindungsgemäß durch die Merkmale der unabhängigen Ansprüche. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.The object is achieved by the features of the independent claims. Advantageous embodiments of the invention are specified in the subclaims.

Erfindungsgemäß ist somit eine Klemmfeder zur Montage auf einer Leiterplatte angegeben. Die Klemmfeder umfasst einen Federschenkel zur klemmenden Kontaktierung eines Leiters, einen Kontaktbereich zur Kontaktierung der Leiterplatte, wobei die Klemmfeder einteilig ausgeführt ist, der Federschenkel ein Betätigungselement zur Aufhebung der Klemmung aufweist, und die Klemmfeder ein Führungselement aufweist, das derart angeordnet ist, dass zwischen dem Federschenkel und dem Führungselement ein Werkzeug zur Betätigung des Betätigungselements einführbar ist.According to the invention thus a clamping spring for mounting on a printed circuit board is specified. The clamping spring comprises a spring leg for clamping contacting a conductor, a contact region for contacting the printed circuit board, wherein the clamping spring is made in one piece, the spring leg has an actuating element for canceling the clamping, and the clamping spring has a guide element which is arranged such that between the Spring leg and the guide element, a tool for actuating the actuating element is insertable.

Erfindungsgemäß ist außerdem eine Leiterplatte mit einer Leiterbahn und einer oben angegebenen Klemmfeder vorgesehen, wobei die Klemmfeder elektrisch leitend mit der Leiterbahn verbunden ist.According to the invention, a circuit board is also provided with a conductor track and a clamping spring specified above, wherein the clamping spring is electrically conductively connected to the conductor track.

Grundidee der vorliegenden Erfindung ist es also, die Klemmfeder so auszugestalten, dass sie selbst eine Führung eines Werkzeugs zur Betätigung des Federschenkels ermöglicht. Dadurch kann der Federschenkel zuverlässig betätigt werden, und ein Abrutschen des Werkzeugs bei der Betätigung wird vermieden. Zusätzliche Bauelemente zur Führung des Werkzeugs sind nicht erforderlich. Gleichzeitig ist die Herstellung der Klemmfeder einfach, da sie einteilig ausgeführt ist. Die Anbringung der Klemmfeder kann einfach durchgeführt werden, indem ein Bereich der Klemmfeder mit der Leiterplatte verlötet wird. Dazu wird die Klemmfeder auf eine Leiterbahn der Leiterplatte aufgesetzt und mit dieser verlötet. Vorzugsweise wird die Klemmfeder mit einem Bereich mit einer ebenen Kontaktfläche auf die Leiterplatte aufgesetzt, um den Lötvorgang zuverlässig durchführen zu können. Die Klemmfeder wird vorzugsweise im SMT-Lötverfahren auf der Leiterplatte angebracht. Dabei wird zunächst eine Lötpaste auf die Leiterplatte aufgetragen, und die Klemmfeder auf die Lötpaste aufgesetzt, so dass die Klemmfeder an der Leiterplatte anhaftet. In einem anschließenden Lötschritt, beispielsweise in einem Löttunnel, wird die Lötverbindung zwischen der Klemmfeder und der Leiterplatte hergestellt, wobei die Lötpaste das Lot für das Löten bereitstellt.The basic idea of the present invention is therefore to configure the clamping spring in such a way that it itself enables guidance of a tool for actuating the spring leg. As a result, the spring leg can be reliably operated, and slippage of the tool during actuation is avoided. Additional components for guiding the tool are not required. At the same time, the production of the clamping spring is simple because it is made in one piece. The attachment of the clamping spring can be easily performed by a portion of the clamping spring is soldered to the circuit board. For this purpose, the clamping spring is placed on a conductor track of the circuit board and soldered to it. Preferably, the clamping spring is placed with an area with a flat contact surface on the circuit board in order to perform the soldering reliably. The clamping spring is preferably mounted on the circuit board in the SMT soldering process. In this case, a solder paste is first applied to the circuit board, and the clamping spring placed on the solder paste, so that the clamping spring adheres to the circuit board. In a subsequent soldering step, for example in a solder tunnel, the solder connection between the clamping spring and the circuit board is made, wherein the solder paste provides the solder for soldering.

Zusätzlich kann die Klemmfeder in einem Verbindungsbereich Bereiche der Leiterplatte überdecken, die keine Leiterbahn aufweisen, oder die Abmessungen der Leiterbahn können über die Abmessungen der Klemmfeder im Verbindungsbereich hinausgehen. Die Ausgestaltung der Leiterplatte mit Leiterbahnen und optionalen weiteren Komponenten ist prinzipiell beliebig und ohne Einfluss auf die Klemmfeder und deren Verbindung mit der Leiterplatte. Die Klemmung kann auf unterschiedliche Weise erfolgen, wobei ein Gegenklemmelement zum Klemmen des Leiters beispielsweise durch einen Anschlag gebildet werden kann, gegen den der eingeführte Leiter durch den Klemmschenkel gedrückt wird.In addition, in a connection region, the clamping spring can cover regions of the printed circuit board which do not have a conductor track, or the dimensions of the conductor track can go beyond the dimensions of the clamping spring in the connection region. The design of the printed circuit board with printed conductors and optional other components is in principle arbitrary and without influence on the clamping spring and its connection to the circuit board. The clamping can be done in different ways, with a counter-clamping element for clamping the conductor can be formed for example by a stop against which the inserted conductor is pressed by the clamping leg.

Die Klemmfeder ist aus einem elektrisch leitenden Material gefertigt. Vorzugsweise weist die Klemmfeder ein Stahlmaterial auf, besonders bevorzugt Federstahl, wodurch ein einfaches und zuverlässiges Klemmen des Leiters ermöglicht wird. Besonders bevorzugt weist die Klemmfeder eine Oberflächenbeschichtung aus einem guten elektrisch leitenden Material auf, so dass die Klemmfeder eine gute elektrische Leitfähigkeit aufweist. Die Oberflächenbeschichtung ist vorzugsweise eine galvanisch aufgebrachte Kupferschicht, die besonders bevorzugt verzinnt ist. Dadurch lässt sich die Klemmfeder einfach verlöten, beispielsweise in einem Reflow-Prozess. Alternativ ist die Klemmfeder aus Bronze hergestellt.The clamping spring is made of an electrically conductive material. Preferably, the clamping spring on a steel material, particularly preferably spring steel, whereby a simple and reliable clamping of the conductor is made possible. Particularly preferably, the clamping spring on a surface coating of a good electrically conductive material, so that the clamping spring has a good electrical conductivity. The surface coating is preferably a galvanically applied copper layer, which is particularly preferably tin-plated. As a result, the clamping spring can be easily soldered, for example in a reflow process. Alternatively, the clamping spring is made of bronze.

Der Federschenkel ist vorzugsweise derart angeordnet und ausgeführt, dass er eine Klemmkant zum kontaktieren des eingeschobenen Leiter aufweist. Besonders bevorzugt ist der Federschenkel derart angeordnet, dass er einen Winkel schräg zur Einführrichtung des Leiters aufweist. Dadurch kann beispielsweise eine Klemmkante an seinem freien Ende den Kontakt bilden. Der Federschenkel ist weiter bevorzugt derart angeordnet und ausgeführt, dass er eine Ablaufschräge für den Leiter bildet. Dadurch wird das Einführen des Leiters erleichtert. Eine innenliegende Anordnung des freien Endes des Federschenkels kann die Führung des Werkzeugs erleichtern.The spring leg is preferably arranged and designed such that it has a clamping edge for contacting the inserted conductor. Particularly preferably, the spring leg is arranged such that it has an angle oblique to the insertion direction of the conductor. As a result, for example, form a clamping edge at its free end the contact. The spring leg is further preferably arranged and designed such that it forms a drainage slope for the conductor. This facilitates the insertion of the conductor. An internal arrangement of the free end of the spring leg can facilitate the guidance of the tool.

Zusätzlich kann ein Gehäuse über die Klemmfeder montiert werden, um einen Berührschutz zu realisieren. Das Gehäuse wird vorzugsweise nach dem Löten auf die Klemmfeder gesteckt.In addition, a housing can be mounted over the clamping spring to realize a contact protection. The housing is preferably inserted after soldering to the clamping spring.

In der Ausgestaltung der Erfindung ist das Betätigungselement an einem freien Ende des Federschenkels angeordnet. Am freien Ende ist die Hebelwirkung des Werkzeugs besonders groß, wodurch die Betätigung mit dem Werkzeug erleichtert wird. Zusätzlich kann der Federschenkel selber als Führung für das Werkzeug dienen.In the embodiment of the invention, the actuating element is arranged at a free end of the spring leg. At the free end of the lever action of the tool is particularly large, whereby the operation is facilitated with the tool. In addition, the spring leg itself can serve as a guide for the tool.

In der Ausgestaltung der Erfindung ist das Betätigungselement an dem Federschenkel an seinem Seitenbereich quer zu seiner Federrichtung angeordnet. Dadurch kann der Federschenkel beispielsweise als Ablaufschräge dienen, ohne dass diese Funktion beispielsweise durch das Werkzeug beeinträchtigt wird. Auch die Betätigung kann in einem seitlichen Bereich erfolgen, so dass eine gleichmäßig einfache Betätigung durch das Werkzeug gewährleistet ist. Eine Beeinträchtigung durch unterschiedliche Positionen des Federschenkels, beispielsweise bedingt durch einen eingeführten Leiter, wird vermieden. Besonders bevorzugt ist an jedem Seitenbereich des Federschenkels ein Betätigungselement angeordnet. Dadurch ist eine besondere Ausrichtung der Klemmfeder zur Betätigung nicht erforderlich.In the embodiment of the invention, the actuating element is arranged on the spring leg at its side region transverse to its spring direction. As a result, the spring leg can serve as a drainage slope, for example, without this function being impaired, for example, by the tool. Also, the operation can be done in a lateral area, so that a uniformly simple operation is ensured by the tool. An impairment caused by different positions of the spring leg, for example due to an inserted conductor, is avoided. Particularly preferably, an actuating element is arranged on each side region of the spring leg. As a result, a special orientation of the clamping spring for actuation is not required.

In der Ausgestaltung der Erfindung weist die Klemmfeder einen feststehenden Klemmschenkel auf, wobei der Leiter zwischen dem Klemmschenkel und dem Federschenkel klemmbar ist. Der Klemmschenkel dient somit als Gegenklemmelement, gegen das der eingeführte Leiter durch den Federschenkel gedrückt wird. Der Klemmschenkel ist vorzugsweise derart ausgeführt und angeordnet, dass er eine Klemmkante zum klemmen des eingeführten Leiters aufweist.In the embodiment of the invention, the clamping spring on a fixed clamping leg, wherein the conductor between the clamping leg and the spring leg is clamped. The clamping leg thus serves as a counter-clamping element, against which the inserted conductor is pressed by the spring leg. The clamping leg is preferably designed and arranged such that it has a clamping edge for clamping the inserted conductor.

De Klemmkante wird vorzugsweise durch ein freies Ende des Klemmschenkels gebildet. Besonders bevorzugt weist die Klemmfeder ein Anschlagelement auf, welches einen Anschlag für den Klemmschenkel bildet. Dadurch kann der Klemmschenkel ortsfest fixiert werden, so dass er ein feststehendes Gegenklemmelement bildet, selbst wenn die Klemmfeder aus einem elastischen Material gefertigt ist. Besonders bevorzugt ist der Klemmschenkel gegen das Anschlagelement vorgespannt.The clamping edge is preferably formed by a free end of the clamping leg. Particularly preferably, the clamping spring has a stop element which forms a stop for the clamping leg. Thereby, the clamping leg can be fixed in place so that it forms a fixed counter-clamping element, even if the clamping spring is made of an elastic material. Particularly preferably, the clamping leg is biased against the stop element.

In vorteilhafter Ausgestaltung der Erfindung bildet der Klemmschenkel eine Einführschräge für den Leiter. Dadurch wird das Einführen des Leiters erleichtert. Alternativ kann auch der Federschenkel eine Einführschräge für den Leiter bilden. Besonders bevorzugt bilden sowohl der Klemmschenkel als auch der Federschenkel eine Einführschräge für den Leiter. Die beiden Schenkel können somit beispielsweise einen Einführtrichter bilden.In an advantageous embodiment of the invention, the clamping leg forms an insertion bevel for the conductor. This facilitates the insertion of the conductor. Alternatively, the spring leg can form an insertion bevel for the conductor. Particularly preferably, both the clamping leg and the spring leg form an insertion bevel for the conductor. The two legs can thus form, for example, an insertion funnel.

In der Ausgestaltung der Erfindung ist das Führungselement als Verbindungselement zwischen dem Klemmschenkel und dem Federschenkel ausgeführt. Somit kann die Klemmfeder einen einfachen Aufbau mit wenigen funktionalen Abschnitten bzw. Komponenten aufweisen.In the embodiment of the invention, the guide element is designed as a connecting element between the clamping leg and the spring leg. Thus, the clamping spring may have a simple structure with few functional sections or components.

In der Ausgestaltung der Erfindung umfasst die Klemmfeder zwei Führungselemente, die jeweils als Verbindungselement zwischen dem Klemmschenkel und dem Federschenkel ausgeführt sind. Somit können der Klemmschenkel und der Federschenkel besonders zuverlässig miteinander verbunden werden. Vorzugsweise sind die zwei Führungselemente derart angeordnet, dass zwischen dem Federschenkel, dem Klemmschenkel und den zwei Führungselementen ein Einführbereich zum Einführen des Leiters gebildet ist.In the embodiment of the invention, the clamping spring comprises two guide elements, which are each designed as a connecting element between the clamping leg and the spring leg. Thus, the clamping leg and the spring leg can be connected to each other particularly reliable. Preferably, the two guide elements are arranged such that between the spring leg, the clamping leg and the two Guide elements an insertion region for insertion of the conductor is formed.

In vorteilhafter Ausgestaltung der Erfindung weist die Klemmfeder an ihrer Montageseite zur Positionierung auf der Leiterplatte wenigstens ein Lötbein auf. Das Lötbein kann in eine Bohrung der Leiterplatte eingesetzt werden, um eine zuverlässige Positionierung der Klemmfeder auf der Leiterplatte zu bewirken. Entsprechend kann die Leiterplatte mit der aufgesetzten Klemmfeder vor dem Löten bewegt werden, ohne dass die Klemmfeder auf der Leiterplatte verrutschen kann. Vorzugsweise ist die Bohrung der Leiterplatte als Kontaktbohrung ausgeführt, so dass eine Kontaktierung der Leiterplatte erfolgt. Die Kontaktierung kann zusätzlich oder alternativ zur der Kontaktierung durch die Anbringung der Kontaktfeder auf der Leiterbahn erfolgen.In an advantageous embodiment of the invention, the clamping spring on its mounting side for positioning on the circuit board at least one soldering leg. The Lötbein can be inserted into a bore of the circuit board to effect a reliable positioning of the clamping spring on the circuit board. Accordingly, the circuit board can be moved with the attached clamping spring before soldering, without the clamping spring can slip on the circuit board. Preferably, the bore of the circuit board is designed as a contact bore, so that a contacting of the circuit board takes place. The contacting can be done additionally or alternatively to the contacting by the attachment of the contact spring on the conductor track.

In vorteilhafter Ausgestaltung der Erfindung ist die Klemmfeder als Blechelement ausgeführt und durch Stanzen und Biegen gefertigt. Dies ermöglicht die Bereitstellung einer Klemmfeder mit einem einfachen Aufbau und eine kostengünstige Herstellung.In an advantageous embodiment of the invention, the clamping spring is designed as a sheet metal element and manufactured by punching and bending. This allows the provision of a clamping spring with a simple structure and a cost-effective production.

Nachfolgend wird die Erfindung unter Bezugnahme auf die anliegende Zeichnung anhand bevorzugter Ausführungsformen näher erläutert.The invention will be explained in more detail with reference to the accompanying drawings with reference to preferred embodiments.

Es zeigen

Fig. 1
eine perspektivische Ansicht einer Klemmfeder gemäß einer ersten Ausführungsform seitlich von unten,
Fig. 2
zwei perspektivische Ansichten der Klemmfeder aus Fig. 1 in einer Ansicht von seitlich oben, wobei in die eine Klemmfeder ein Leiter eingeführt ist, und
Fig. 3
eine perspektivische Ansicht einer Leiterplatte mit zwei Klemmfedern gemäß Fig. 1 mit eingeführten Leitern.
Show it
Fig. 1
a perspective view of a clamping spring according to a first embodiment laterally from below,
Fig. 2
two perspective views of the clamping spring Fig. 1 in a view from the top side, in which a clamping spring, a conductor is inserted, and
Fig. 3
a perspective view of a circuit board with two clamping springs according to Fig. 1 with inserted ladders.

Die Figuren 1 und 2 zeigen eine erfindungsgemäße Klemmfeder 1 gemäß einer ersten, bevorzugten Ausführungsform. Die Klemmfeder 1 ist als einteiliges Blechelement aus Federstahl mit einer galvanisch aufgebrachten Kupferschichtung und Verzinnung ausgeführt und durch Stanzen und Biegen gefertigt.The FIGS. 1 and 2 show a clamping spring 1 according to the invention according to a first preferred embodiment. The clamping spring 1 is designed as a one-piece sheet metal element made of spring steel with an electroplated copper layering and tinning and made by punching and bending.

Die Klemmfeder 1 umfasst einen feststehenden Klemmschenkel 3, einen Federschenkel 5 und zwei Führungselemente 7. Die Führungselemente 7 sind als Verbindungselemente ausgeführt, die mit einem Ende 9 des Klemmschenkels 3 und einem Ende 11 des Federschenkels 5 verbunden sind.The clamping spring 1 comprises a fixed clamping leg 3, a spring leg 5 and two guide elements 7. The guide elements 7 are designed as connecting elements, which are connected to one end 9 of the clamping leg 3 and one end 11 of the spring leg 5.

Der Klemmschenkel 3 ist als im Wesentlichen längliches Blechelement ausgeführt, das in der Form einer Öse gebogen ist, so dass seine beiden Enden 9, 13 miteinander in Anlage kommen. Wie im Detail in Figur 1 gezeigt ist, weist der Klemmschenkel 3 an seinem gehaltenen Ende 9 einen Vorsprung 15 auf, der als Anschlagelement ausgeführt ist und einen Anschlag für das andere, freie Ende 13 des Klemmschenkels 3 bildet.The clamping leg 3 is designed as a substantially elongated sheet metal element which is bent in the shape of an eyelet, so that its two ends 9, 13 come into contact with each other. As in detail in FIG. 1 is shown, the clamping leg 3 at its held end 9, a projection 15 which is designed as a stop element and forms a stop for the other, free end 13 of the clamping leg 3.

Auch der Federschenkel 5 ist als im Wesentlichen längliches Blechelement ausgeführt, das im Wesentlichen in der Form eines geöffneten Dreiecks gebogen ist, so dass seine beiden Enden 11, 17 nicht miteinander in Anlage kommen. An seinem freien Ende 15 weist der Federschenkel 5 zwei Betätigungselemente 27 auf, die an beiden Seiten quer zu der Federrichtung des Federschenkels 5 angeordnet sind. Die Betätigungselemente 27 sind als seitliche Vorsprünge ausgeführt.Also, the spring leg 5 is designed as a substantially elongate sheet metal element which is bent in the shape of an open triangle substantially, so that its two Ends 11, 17 do not come into contact with each other. At its free end 15, the spring leg 5 on two actuators 27 which are arranged transversely to the spring direction of the spring leg 5 on both sides. The actuators 27 are designed as lateral projections.

Zwischen dem Federschenkel 5, dem Klemmschenkel 3 und den zwei Führungselementen 7 ist ein Einführbereich 19 zum Einführen eines Leiters 21 gebildet. Wie in Figur 2 gezeigt wird der Leiter 21 im eingeführten Zustand von dem Federschenkel 5 gegen Klemmschenkel 3 gedrückt, so dass der Leiter 21 gleichzeitig die Klemmfeder 1 kontaktiert und klemmend darin gehalten ist. Dabei wird sowohl zwischen dem Klemmschenkel 3 und dem Leiter 21 wie auch zwischen dem Federschenkel 5 und dem Leiter 21 am freien Ende 13, 17 des jeweiligen Schenkels 3, 5 ein Kontakt entlang einer Klemmkante 23 gebildet.Between the spring leg 5, the clamping leg 3 and the two guide elements 7, an insertion region 19 for inserting a conductor 21 is formed. As in FIG. 2 shown the conductor 21 is pressed in the inserted state of the spring leg 5 against clamping leg 3, so that the conductor 21 at the same time contacted the clamping spring 1 and is clamped therein. In this case, a contact along a clamping edge 23 is formed both between the clamping leg 3 and the conductor 21 as well as between the spring leg 5 and the conductor 21 at the free end 13, 17 of the respective leg 3, 5.

Sowohl der Klemmschenkel 3 wie auch der Federschenkel 5 bilden eine Einführschräge für den Leiter 19, wodurch insgesamt ein Einführtrichter 25 gebildet wird.Both the clamping leg 3 as well as the spring leg 5 form an insertion bevel for the conductor 19, whereby a total of an insertion funnel 25 is formed.

Die Klemmung des Leiters 21 ist in Figur 2 gezeigt. Durch ein nicht dargestelltes Werkzeug kann die Klemmfeder 1 geöffnet werden. Das Werkzeug kann beispielsweise als Schlitzschraubendreher ausgeführt sein. Das Werkzeug wird zwischen dem Federschenkel 5 und einem der Führungselemente 7 bis zum Erreichen des entsprechenden Betätigungselements 27 eingeführt. Dazu weisen die Führungselemente 7 jeweils eine Auswölbung 29 zur Aufnahme des Werkzeugs auf. Durch Ausüben einer Kraft auf das Betätigungselement 27 wird der Federschenkel 5 elastisch verformt, wodurch der Einführbereich 19 geöffnet wird und der Leiter 21 entlang des Einführtrichters 25 in den Einführbereich 19 eingeführt werden kann. Anschließend kann das Werkzeug entfernt werden, so dass der Federschenkel 5 eine elastische Rückverformung erfährt und den Leiter 21 zwischen sich und dem Klemmschenkel 3 elastisch klemmt und wie oben beschrieben kontaktiert. Durch erneutes Einführen des Werkzeugs und Ausüben einer Kraft auf das Betätigungselement 27 wird der Federschenkel 5 wiederum elastisch verformt, wodurch der Leiter 21 aus der Klemmfeder 1 entnommen werden kann.The clamping of the conductor 21 is in FIG. 2 shown. By a tool, not shown, the clamping spring 1 can be opened. The tool may for example be designed as a flat-head screwdriver. The tool is inserted between the spring leg 5 and one of the guide elements 7 until reaching the corresponding actuating element 27. For this purpose, the guide elements 7 each have a bulge 29 for receiving the tool. By exerting a force on the actuator 27, the spring leg 5 is elastically deformed, whereby the insertion region 19 is opened and the conductor 21 along the insertion funnel 25 can be inserted into the insertion area 19. Subsequently, the tool can be removed, so that the spring leg 5 undergoes an elastic recovery and elastically clamps the conductor 21 between itself and the clamping leg 3 and contacted as described above. By re-inserting the tool and exerting a force on the actuator 27, the spring leg 5 is in turn elastically deformed, whereby the conductor 21 can be removed from the clamping spring 1.

Alternativ kann der Leiter auch ohne Werkzeug in die Klemmfeder 1 eingeführt werden. Dazu wird der Leiter 21 in den Einführtrichter 25 eingeschoben, bis er mit beiden Schenkeln 3, 5 in Anlage kommt. Durch weiteres Einschieben des Leiters 21 wird eine Kraft auf den Federschenkel 5 ausgeübt, wodurch sich dieser elastisch verformt und der Leiter 21 in den Einführbereich 17 eingeführt werden kann. Die Klemmung und Kontaktierung des Leiters 21 in der Klemmfeder 1 erfolgt automatisch bei Beendigung des Einführvorgangs.Alternatively, the conductor can be inserted without tools in the clamping spring 1. For this purpose, the conductor 21 is inserted into the insertion funnel 25 until it comes into contact with both legs 3, 5. By further insertion of the conductor 21, a force is exerted on the spring leg 5, whereby it is elastically deformed and the conductor 21 can be inserted into the insertion area 17. The clamping and contacting of the conductor 21 in the clamping spring 1 takes place automatically at the end of the insertion process.

Figur 3 zeigt die Anbringung der Klemmfeder 1 auf einer Leiterplatte 31. Zur Montage ist die Klemmfeder 1 an ihrer Unterseite 33 mit zwei Lötbeinen 35 ausgeführt, mit denen die Klemmfeder 1 in Durchgangslöchern der Leiterplatte 31 positioniert wird. Anschließend wird die Klemmfeder 1 an ihrer Unterseite 33 mit einer Leiterbahn der Leiterplatte 31 verlötet, wodurch eine mechanische und elektrisch leitende Verbindung der Klemmfeder mit der Leiterbahn gebildet wird. Die Unterseite 33 bildet somit einen Kontaktbereich der Klemmfeder 1. Bezugszeichenliste Klemmfeder 1 Klemmschenkel 3 Federschenkel 5 Führungselement, Verbindungselement 7 gehaltenes Ende (Klemmschenkel) 9 gehaltenes Ende (Federschenkel) 11 freies Ende (Klemmschenkel) 13 Anschlagelement (Vorsprung) 15 freies Ende (Federschenkel) 17 Einführbereich 19 Leiter 21 Klemmkante 23 Einführtrichter 25 Betätigungselement / Vorsprung 27 Auswölbung 29 Leiterplatte 31 Unterseite / Kontaktbereich 33 Lötbein 35 Durchgangsloch 37 Leiterbahn 39 FIG. 3 shows the attachment of the clamping spring 1 on a printed circuit board 31. For mounting, the clamping spring 1 is executed on its underside 33 with two solder legs 35, with which the clamping spring 1 is positioned in through holes of the printed circuit board 31. Subsequently, the clamping spring 1 is soldered to its underside 33 with a conductor track of the printed circuit board 31, whereby a mechanical and electrically conductive connection of the clamping spring is formed with the conductor track. The underside 33 thus forms a contact region of the clamping spring. 1 LIST OF REFERENCE NUMBERS clamping spring 1 clamping leg 3 spring leg 5 Guide element, connecting element 7 held end (clamping leg) 9 held end (spring leg) 11 free end (clamping leg) 13 Stop element (projection) 15 free end (spring leg) 17 insertion 19 ladder 21 clamping edge 23 insertion funnel 25 Actuator / projection 27 bulge 29 circuit board 31 Bottom / contact area 33 Lötbein 35 Through Hole 37 conductor path 39

Claims (5)

  1. Clamping spring (1) for mounting on a printed circuit board (31), comprising
    a spring limb (5) for making clamping contact with a conductor (21),
    a contact region (33) for making contact with the printed circuit board (31),
    wherein
    the clamping spring (1) is integrally formed and has a fixed clamping limb (1), wherein the conductor (21) can be clamped between the clamping limb (3) and the spring limb (5),
    characterized
    in that the clamping limb (3) is designed as a substantially elongate sheet-metal element which is bent in the form of a eyelet, so that the two ends (9, 13) of the said clamping limb come into contact with one another,
    in that the spring limb (5) is designed as a substantially elongate sheet-metal element which is bent substantially in the form of an open triangle, so that the two ends (11, 17) of the said spring limb do not come into contact with one another,
    in that the spring limb (5), at its free end (17), has two operating elements (27), which are arranged transverse to the spring direction of the spring limb (5) on both sides, for eliminating the clamping action, and
    in that the clamping spring (1) has two guide elements (7), wherein the guide elements (7) each connect one end (9) of the clamping limb (3) and one end (11) of the spring limb (5) to one another, and wherein the two guide elements (7), the clamping limb (3) and the spring limb (5) form an insertion region for inserting the conductor (21), and wherein a tool is inserted between the spring limb (5) and one of the guide elements (7) until the appropriate operating element (27) is reached.
  2. Clamping spring according to one of the preceding claims,
    characterized in that
    the clamping limb (3) forms an insertion bevel for the conductor (21).
  3. Clamping spring (1) according to either of the preceding claims,
    characterized in that
    the clamping spring (1) has, on its mounting side, at least one soldering lug (35) for positioning on the printed circuit board (31).
  4. Clamping spring (1) according to one of the preceding claims,
    characterized in that
    the clamping spring (1) is designed as a sheet-metal element and is manufactured by punching and bending.
  5. Printed circuit board (31) comprising a conductor track (39) and a clamping spring (1) according to one of the preceding claims,
    wherein the clamping spring (1) is electrically conductively connected to the conductor track (39).
EP14759148.1A 2013-09-09 2014-09-03 Clamping spring Active EP3044834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013109802.9A DE102013109802A1 (en) 2013-09-09 2013-09-09 clamping spring
PCT/EP2014/068667 WO2015032788A1 (en) 2013-09-09 2014-09-03 Clamping spring

Publications (2)

Publication Number Publication Date
EP3044834A1 EP3044834A1 (en) 2016-07-20
EP3044834B1 true EP3044834B1 (en) 2018-09-26

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Family Applications (1)

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EP14759148.1A Active EP3044834B1 (en) 2013-09-09 2014-09-03 Clamping spring

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US (1) US9711876B2 (en)
EP (1) EP3044834B1 (en)
CN (1) CN105531874B (en)
DE (1) DE102013109802A1 (en)
WO (1) WO2015032788A1 (en)

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Publication number Publication date
WO2015032788A1 (en) 2015-03-12
US20160197418A1 (en) 2016-07-07
CN105531874B (en) 2018-01-05
EP3044834A1 (en) 2016-07-20
DE102013109802A1 (en) 2015-03-12
CN105531874A (en) 2016-04-27
US9711876B2 (en) 2017-07-18

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