EP2243146B1 - Contact spring - Google Patents

Contact spring Download PDF

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Publication number
EP2243146B1
EP2243146B1 EP09710138A EP09710138A EP2243146B1 EP 2243146 B1 EP2243146 B1 EP 2243146B1 EP 09710138 A EP09710138 A EP 09710138A EP 09710138 A EP09710138 A EP 09710138A EP 2243146 B1 EP2243146 B1 EP 2243146B1
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EP
European Patent Office
Prior art keywords
contact
spring
metal contact
bend
lamellae
Prior art date
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EP09710138A
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German (de)
French (fr)
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EP2243146A1 (en
Inventor
Christian Dandl
Michael Wollitzer
Armin MAIWÄLDER
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Rosenberger Hochfrequenztechnik GmbH and Co KG
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Rosenberger Hochfrequenztechnik GmbH and Co KG
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Publication of EP2243146A1 publication Critical patent/EP2243146A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2464—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the contact point
    • H01R13/2492—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the contact point multiple contact points
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
    • H01H1/10—Laminated contacts with divided contact surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/18—End pieces terminating in a probe

Definitions

  • the present invention relates to a contact spring having a free contact end for producing an electrical contact between the free contact end and a contact surface, wherein the contact spring of N contact plates and N-1 spacer elements is formed with N ⁇ 2, wherein the contact spring plates in a clamping region, each with a Distance element between two adjacent contact plates are kept fixed, are spaced apart in a spring range, free spring parallel to each other to the free contact end and ends at the free contact end in a common plane, wherein the contact spring plates in the spring region at least one kink, each with a predetermined angle between the longitudinal axis of the contact spring plates in front of the bend and the longitudinal axis of the contact spring plates have after the kink, according to the preamble of claim 1.
  • an electrical contact in which a contact part is brought into contact with a plurality of leaf-shaped contact springs.
  • This spring packs are provided with a plurality of mutually parallel individual springs are mounted in a holder.
  • This arrangement requires a blade contact, which is introduced perpendicular to the spring pacts and deflects the individual springs of the spring assemblies perpendicular to a longitudinal axis of the individual springs. Therefore, the contact arrangement is not suitable for contacting a contact surface on a printed circuit board.
  • the generic DE 100 24 165 A1 relates to a Greiersystem with a first contact element and a second contact element, which are made of a resilient and at the same time conductive material.
  • the contact elements are each composed of a male part, an associated spring arm and a contact tip connected thereto, the spring arms having the contact tip at one end and the male part at the other end.
  • the spring arm is angled relative to the associated male part by an angle of approximately 80 °.
  • the contact tips are angled relative to the respective spring arm by an angle of about 120 °.
  • the contact tips serve in conjunction with the spring arms for contacting an electrical connection of an electronic component.
  • the two insertion parts of the contact elements are arranged in a receiving device with a printed circuit board arranged therebetween.
  • the spring arms are spaced apart in a region between the male parts and the contact tips, said distance being substantially smaller than a thickness of the printed circuit board which spaces the two male parts of the contact elements. This has the disadvantage that only a very small travel for the spring arms is
  • the brush comprises copper slats, wherein between adjacent copper slats very elastic metal springs are arranged. These metal springs press the copper lamellae with a constant pressure against a contact surface.
  • the package of copper fins and metal springs is clamped in a central area. From this central region, the copper lamellae extend with interposed metal springs with a kink and with increasing distance from one another to a contact plane.
  • the invention is based on the object, a contact spring of o.g. To improve the type of contact resistance and current transfer capacity.
  • the contact spring plates are spaced apart in the spring region by the thickness of the spacer elements and starting from the free contact end at least one of the contact spring plates each having at least one slot.
  • the common plane of the free contact end is arranged perpendicular to a longitudinal axis of the contact spring plates and spacer elements in the clamping region.
  • the contact spring plates expediently have two, three or four kinks in the spring region.
  • the contact spring plates in the spring region have at least one slot, adjoining the slot are mutually independent resilient contact tongues and multiply the free contact end free resilient contact elements, so that multiply the contact points accordingly.
  • the at least one slot extends over at least one bend of the contact spring plates and preferably runs parallel to a longitudinal axis of the contact spring plates.
  • the contact spring plates and spacer elements are, for example, riveted and / or screwed together in the clamping area.
  • the spacer elements extend over a part of the clamping region or over the entire length of the clamping region.
  • the predetermined angle between the longitudinal axis of the contact spring plates in front of the kink and the longitudinal axis of the contact spring plates after the kink is identical for all kinks.
  • a substantially zigzag-shaped design of the spring region is achieved in that, in the spring region, the predetermined angle between the longitudinal axis of the contact spring plates before the kink and the longitudinal axis of the contact spring plates after the kink, starting from the clamping region in the direction of the contact end, increases for a first kink 90 ° and for each additional bend is less than or equal to 90 °.
  • the sum of the angle 28 of two successive bends 24 is equal to or greater than 180 °.
  • a contact spring comprises a free contact end 10 for making electrical contact with a more or less flat contact surface (not shown).
  • the contact spring plates 12 are held fixed in a clamping region 16, each with a spacer element 14 between two adjacent contact plates 12.
  • the spacer elements 14 extend only over the clamping region 16.
  • the contact spring plates 12 extend beyond the clamping region 16 and form a spring region 20 between the clamping region 16 and the contact end 10.
  • the contact spring plates 12 are spaced apart from each other by the thickness of the spacer elements 14 and thus spring freely and independently of each other, as long as they do not abut each other due to the spring travel. Furthermore, the contact spring plates 12 are formed such that they extend over the entire length of the spring region 20 between the contact end 10 and the clamping region 16 parallel to each other. At the free contact end 10, the contact spring plates 12 end in a common plane, which is aligned perpendicular to a longitudinal axis 22 of the contact spring plates 12 in the clamping region 16.
  • the space between the contact sheets 12 is empty, that is, no spacer 14 is provided, as in particular from Fig. 3 and 4 seen. This free space is used for compressing the contact spring in the direction of the longitudinal axis 22nd
  • the contact spring plates 12 in the spring region 20 at least one kink 24 each having a predetermined angle 26, 28 between the longitudinal axis 22 and 23 of the contact spring plates 12 in front of the kink 24 and the longitudinal axis 23 of the contact spring plates 12 after the kink 24.
  • all longitudinal axes are designated by a kink 24 by the reference numeral 23.
  • angle is meant between two longitudinal axes 23 of the respective smaller of the two complementary angles at a kink 24, as in the Fig. 3 and 4 shown.
  • the contact spring plates 12 are each provided with a slot 30.
  • the spring travel of the contact spring according to the invention is with the thickness the spacer elements 14 set.
  • the hardness of the spring is adjusted by the thickness and width of the contact spring plates 12 and by the number of contact spring plates 12.
  • the high-current contact spring according to the invention is characterized by a very low contact resistance with a sufficiently large material cross-section and low spring stiffness.
  • the contact spring is preferably suitable for touching (contact) on flat surfaces, such as pads or contact surfaces of printed circuit boards.
  • the contact spring shown by way of example in the figures has eleven contact spring plates 12 and ten spacer elements or intermediate plates 14. Through the central slot 30, the resulting through the slot 30 left and right contact spring half spring independently. As a result, both spring halves contact securely on the contact surface. The contact spring remains but laterally stable. Depending on the application, two, three or more slots 30 may also be provided, resulting in a corresponding tripling, quadrupling or multiplication of the independently spring-loaded contact spring halves.
  • the spacers or intermediate plates 14 provide the necessary flexibility in compression by ensuring a sufficiently large gap 32 between the contact plates 12.
  • the many independently resilient contact points form the basis for a low contact resistance, since the contact pressure at each contact point is uniformly high.
  • the contact spring according to the invention comprises a block of S-shaped bent contact spring plates or individual springs 12, wherein the resilient geometry is identical in all contact springs or individual springs 12 of the block.
  • individual contact plates 12 may have additional cross sections (attachments). It results in an advantageous manner, a low contact resistance, a rigid contact perpendicular to the working and contacting plane as well as a soft spring with a larger material cross-section and a compact overall dimension.
  • the spring stiffness is essentially determined by the material thickness and the number of contact spring plates or individual springs 12.
  • Fig. 5 and 6 show a contacting element 34 which has a plurality of contact springs according to the invention to produce a plurality of mutually separate electrical contacts in parallel.

Landscapes

  • Contacts (AREA)
  • Measuring Leads Or Probes (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The invention relates to a contact spring having a free contact end (10) for producing an electrical contact between the free contact end (10) and a contact surface, the contact spring being formed from N contact spring metal sheets (12) and N-1 spacer elements (14), N being ≥2. The contact spring metal sheets (12) are fixed in a clamping region (16) with a spacer element (14) between two adjacent contact spring metal sheets (12), are at a distance from each other in a spring region (20) around the thickness of the spacer elements (14), extend parallel to each other up to the free contact end (10) in a freely elastic manner, and end in a common plane on the free contact end (10). The arrangement is such that, in the spring region (20), the contact spring metal sheets (12) have at least one bend (24) with a pre-determined angle (26, 28) between the longitudinal axis (22, 23) of the contact spring metal sheets (12) before the bend (24) and the longitudinal axis (23) of the contact spring metal sheets (12) after the bend (24).

Description

Die vorliegende Erfindung betrifft eine Kontaktfeder mit einem freien Kontaktende zum Herstellens eines elektrischen Kontaktes zwischen dem freien Kontaktende und einer Kontaktfläche, wobei die Kontaktfeder aus N Kontaktfederblechen und N-1 Abstandselementen mit N≥2 ausgebildet ist, wobei die Kontaktfederbleche in einem Klemmbereich mit je einem Abstandselement zwischen zwei benachbarten Kontaktfederblechen fixiert gehalten sind, in einem Federbereich voneinander beabstandet sind, frei federnd parallel zueinander bis zum freien Kontaktende verlaufen und am freien Kontaktende in einer gemeinsamen Ebene enden, wobei die Kontaktfederbleche in dem Federbereich wenigstens einen Knick mit jeweils einem vorbestimmten Winkel zwischen der Längsachse der Kontaktfederbleche vor dem Knick und der Längsachse der Kontaktfederbleche nach dem Knick aufweisen, gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a contact spring having a free contact end for producing an electrical contact between the free contact end and a contact surface, wherein the contact spring of N contact plates and N-1 spacer elements is formed with N≥2, wherein the contact spring plates in a clamping region, each with a Distance element between two adjacent contact plates are kept fixed, are spaced apart in a spring range, free spring parallel to each other to the free contact end and ends at the free contact end in a common plane, wherein the contact spring plates in the spring region at least one kink, each with a predetermined angle between the longitudinal axis of the contact spring plates in front of the bend and the longitudinal axis of the contact spring plates have after the kink, according to the preamble of claim 1.

Aus der DE 886616 B ist eine elektrischer Kontakt bekannt, bei dem ein Kontaktteil mit mehreren blattförmigen Kontaktfedern in Berührung gebracht wird. Hierbei sind Federpakte mit mehreren parallel zueinander angeordneten Einzelfedern vorgesehen die in einer Halterung befestigt sind. Diese Anordnung benötigt einen Messerkontakt, welcher senkrecht zu den Federpakten eingeführt wird und die Einzelfedern der Federpakete senkrecht zu einer Längsachse der Einzelfedern auslenkt. Daher ist die Kontaktanordnung nicht zum Kontaktieren einer Kontaktfläche auf einer Leiterplatte geeignet.From the DE 886616 B For example, an electrical contact is known in which a contact part is brought into contact with a plurality of leaf-shaped contact springs. This spring packs are provided with a plurality of mutually parallel individual springs are mounted in a holder. This arrangement requires a blade contact, which is introduced perpendicular to the spring pacts and deflects the individual springs of the spring assemblies perpendicular to a longitudinal axis of the individual springs. Therefore, the contact arrangement is not suitable for contacting a contact surface on a printed circuit board.

Die gattungsgemäße DE 100 24 165 A1 betrifft ein Kontaktiersystem mit einem ersten Kontaktelement und einem zweiten Kontaktelement, die aus einem federnden und zugleich leitenden Material hergestellt sind. Die Kontaktelemente setzen sich jeweils aus einem Einsteckteil, einem damit verbundenen Federarm und einer damit verbundenem Kontaktspitze zusammen, wobei die Federarme an einem Ende die Kontaktspitze und am anderen Ende das Einsteckteil aufweisen. Der Federarm ist gegenüber dem zugehörigen Einsteckteil um einen Winkel von ungefähr 80° abgewinkelt. Ebenfalls sind die Kontaktspitzen gegenüber dem jeweiligen Federarm um einen Winkel von ungefähr 120° abgewinkelt. Die Kontaktspitzen dienen in Verbindung mit den Federarmen zum Kontaktieren eines elektrischen Anschlusses eines elektronischen Bauelementes. Die beiden Einsteckteile der Kontaktelemente sind in einer Aufnahmevorrichtung mit einer dazwischen angeordneten Leiterplatte angeordnet. Die Federarme sind in einem Bereich zwischen den Einsteckteilen und den Kontaktspitzen voneinander beabstandet, wobei dieser Abstand wesentlich kleiner ist als eine Dicke der Leiterplatte, welche die beiden Einsteckteile der Kontaktelemente voneinander beabstandet. Dies hat den Nachteil, dass nur ein sehr geringer Federweg für die Federarme erzielt wird.The generic DE 100 24 165 A1 relates to a Kontaktiersystem with a first contact element and a second contact element, which are made of a resilient and at the same time conductive material. The contact elements are each composed of a male part, an associated spring arm and a contact tip connected thereto, the spring arms having the contact tip at one end and the male part at the other end. The spring arm is angled relative to the associated male part by an angle of approximately 80 °. Also, the contact tips are angled relative to the respective spring arm by an angle of about 120 °. The contact tips serve in conjunction with the spring arms for contacting an electrical connection of an electronic component. The two insertion parts of the contact elements are arranged in a receiving device with a printed circuit board arranged therebetween. The spring arms are spaced apart in a region between the male parts and the contact tips, said distance being substantially smaller than a thickness of the printed circuit board which spaces the two male parts of the contact elements. This has the disadvantage that only a very small travel for the spring arms is achieved.

Aus der DE 323 187 C ist eine elektrische Kontaktbürste für elektrische Maximalschalter bekannt. Die Bürste umfasst Kupferlammellen, wobei zwischen benachbarten Kupferlamellen sehr elastische Metallfedern angeordnet sind. Diese Metallfedern drücken die Kupferlamellen mit einem immer gleichen Druck gegen eine Kontaktfläche. Das Paket aus Kupferlamellen und Metallfedern ist in einem mittleren Bereich klemmend gehalten. Aus diesem mittleren Bereich erstrecken sich die Kupferlamellen mit dazwischen liegenden Metallfedern mit einem Knick und mit zunehmendem Abstand voneinander bis in eine Kontaktebene.From the DE 323 187 C is an electrical contact brush for maximum electrical switch known. The brush comprises copper slats, wherein between adjacent copper slats very elastic metal springs are arranged. These metal springs press the copper lamellae with a constant pressure against a contact surface. The package of copper fins and metal springs is clamped in a central area. From this central region, the copper lamellae extend with interposed metal springs with a kink and with increasing distance from one another to a contact plane.

Der Erfindung liegt die Aufgabe zugrunde, eine Kontaktfeder der o.g. Art hinsichtlich Kontaktwiderstand und Stromübertragungskapazität zu verbessern.The invention is based on the object, a contact spring of o.g. To improve the type of contact resistance and current transfer capacity.

Diese Aufgabe wird erfindungsgemäß durch eine Kontaktfeder der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen beschrieben.This object is achieved by a contact spring of the type mentioned above with the features characterized in claim 1. Advantageous embodiments of the invention are described in the further claims.

Bei einer Kontaktfeder der o.g. Art ist es erfindungsgemäß vorgesehen, dass die Kontaktfederbleche in dem Federbereich um die Dicke der Abstandselemente voneinander beabstandet sind und ausgehend vom dem freien Kontaktende wenigstens eines der Kontaktfederbleche jeweils wenigstens einen Schlitz aufweist.With a contact spring of the o.g. It is inventively provided that the contact spring plates are spaced apart in the spring region by the thickness of the spacer elements and starting from the free contact end at least one of the contact spring plates each having at least one slot.

Dies hat den Vorteil, dass eine Kontaktfeder zur Verfügung steht, welche in Richtung parallel zu einer Längsachse der Kontaktfederbleche und Abstandselemente im Klemmbereich einfedern kann, wobei durch den Abstand der Kontaktfederbleche im Federbereich alle Kontaktfederbleche gleichzeitig und unabhängig voneinander einfedern können. Auf diese Weise ist auch bei einer unebenen Kontaktfläche eine wenigstens der Anzahl der Kontaktfederbleche entsprechende Anzahl von Kontaktpunkten bzw. -stellen zwischen dem freien Kontaktende der Kontaktfeder und der Kontaktfläche. Weiterhin ergibt sich der Vorteil, dass auf unebenen und/oder nachgiebigen Kontaktflächen, beispielsweise auf Leiterplatten, wiederholt (große Zyklen von 10.000 bis 20.000 oder mehr) ein oder parallel mehrere elektrische Kontakte mit hoher Güte hergestellt werden können.This has the advantage that a contact spring is available, which can spring in the direction parallel to a longitudinal axis of the contact spring plates and spacer elements in the clamping area, which can spring through the distance of the contact spring plates in the spring area all contact springs simultaneously and independently. In this way, even with an uneven contact surface, at least the number of contact spring plates corresponding number of contact points or points between the free contact end of the contact spring and the contact surface. Furthermore, there is the advantage that on uneven and / or flexible contact surfaces, for example on printed circuit boards, repeated (large cycles of 10,000 to 20,000 or more) one or more parallel electrical contacts can be made with high quality.

In einer bevorzugten Ausführungsform ist die gemeinsame Ebene des freien Kontaktendes senkrecht zu einer Längsachse der Kontaktfederbleche und Abstandselemente im Klemmbereich angeordnet.In a preferred embodiment, the common plane of the free contact end is arranged perpendicular to a longitudinal axis of the contact spring plates and spacer elements in the clamping region.

Zweckmäßigerweise weisen die Kontaktfederbleche in dem Federbereich zwei, drei oder vier Knicke auf.The contact spring plates expediently have two, three or four kinks in the spring region.

Dadurch, dass ausgehend vom dem freien Kontaktende alle Kontaktfederbleche im Federbereich wenigstens einen Schlitz aufweisen, ergeben sich benachbart zu dem Schlitz unabhängig voneinander federnde Kontaktzungen und es vervielfachen sich die am freien Kontaktende frei federnden Kontaktelemente, so dass sich die Kontaktstellen dementsprechend vervielfachen. Hierbei erstreckt sich der wenigstens eine Schlitz über wenigstens einen Knick der Kontaktfederbleche hinweg und verläuft bevorzugt parallel zu einer Längsachse der Kontaktfederbleche.Because starting from the free contact end, all the contact spring plates in the spring region have at least one slot, adjoining the slot are mutually independent resilient contact tongues and multiply the free contact end free resilient contact elements, so that multiply the contact points accordingly. In this case, the at least one slot extends over at least one bend of the contact spring plates and preferably runs parallel to a longitudinal axis of the contact spring plates.

Die Kontaktfederbleche und Abstandselemente sind im Klemmbereich beispielsweise miteinander vernietet und/oder verschraubt.The contact spring plates and spacer elements are, for example, riveted and / or screwed together in the clamping area.

Zweckmäßigerweise erstrecken sich die Abstandselemente über einen Teil des Klemmbereichs oder über die gesamte Länge des Klemmbereichs.Expediently, the spacer elements extend over a part of the clamping region or over the entire length of the clamping region.

In einer bevorzugten Ausführungsform ist der vorbestimmte Winkel zwischen der Längsachse der Kontaktfederbleche vor dem Knick und der Längsachse der Kontaktfederbleche nach dem Knick für alle Knicke identisch.In a preferred embodiment, the predetermined angle between the longitudinal axis of the contact spring plates in front of the kink and the longitudinal axis of the contact spring plates after the kink is identical for all kinks.

Eine im Wesentlichen zick-zack-förmige Ausbildung des Federbereiches erzielt man dadurch, dass im Federbereich der vorbestimmte Winkel zwischen der Längsachse der Kontaktfederbleche vor dem Knick und der Längsachse der Kontaktfederbleche nach dem Knick ausgehend von dem Klemmbereich in Richtung Kontaktende gesehen für einen ersten Knick größer 90° und für jeden weiteren Knick kleiner oder gleich 90° ist.A substantially zigzag-shaped design of the spring region is achieved in that, in the spring region, the predetermined angle between the longitudinal axis of the contact spring plates before the kink and the longitudinal axis of the contact spring plates after the kink, starting from the clamping region in the direction of the contact end, increases for a first kink 90 ° and for each additional bend is less than or equal to 90 °.

Zweckmäßigerweise ist die Summe der Winkel 28 von zwei aufeinander folgenden Knicken 24 gleich oder größer 180°.Conveniently, the sum of the angle 28 of two successive bends 24 is equal to or greater than 180 °.

Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Diese zeigt in:

Fig.1
eine bevorzugte Ausführungsform einer erfindungsgemäßen Kontaktfeder Schnittansicht,
Fig. 2
die bevorzugte Ausführungsform einer erfindungsgemäßen Kontaktfeder gemäß Fig. 1 in Aufsicht,
Fig. 3
eine vergrößerte Ansicht von Detail B von Fig. 1,
Fig. 4
eine vergrößerte Ansicht von Detail A von Fig. 1,
Fig. 5
ein Kontaktierungselement mit mehreren erfindungsgemäßen Kontaktfedern in einer Ansicht von unten und
Fig. 6
das Kontaktierungselement gemäß Fig. 5 in einer teilweise aufgeschnittenen Seitenansicht.
The invention will be explained in more detail below with reference to the drawing. This shows in:
Fig.1
a preferred embodiment of a contact spring according to the invention sectional view,
Fig. 2
the preferred embodiment of a contact spring according to the invention Fig. 1 in supervision,
Fig. 3
an enlarged view of detail B of Fig. 1 .
Fig. 4
an enlarged view of detail A of Fig. 1 .
Fig. 5
a contacting element with a plurality of contact springs according to the invention in a view from below and
Fig. 6
the contacting element according to Fig. 5 in a partially cutaway side view.

Die in den Fig. 1 bis 4 dargestellte, bevorzugte Ausführungsform einer erfindungsgemäßen Kontaktfeder umfasst ein freies Kontaktende 10 zum Herstellen eines elektrischen Kontaktes mit einer mehr oder weniger ebenen Kontaktfläche (nicht dargestellt). Die Kontaktfeder ist aus N = 11 Kontaktfederblechen 12 und N-1 = 10 Abstandselementen 14 ausgebildet. Die Kontaktfederbleche 12 sind in einem Klemmbereich 16 mit je einem Abstandselement 14 zwischen zwei benachbarten Kontaktfederblechen 12 fixiert gehalten. Hierzu ist ein Stapel bzw. ein Paket aus abwechselnd aufeinander angeordneten Kontaktfederbleche 12 und Abstandselementen 14 mittels Nieten 18 miteinander vernietet. Die Abstandselemente 14 erstrecken sich nur über den Klemmbereich 16. Die Kontaktfederbleche 12 erstrecken sich über den Klemmbereich 16 hinaus und bilden zwischen dem Klemmbereich 16 und dem Kontaktende 10 einen Federbereich 20 aus. In diesem Federbereich 20 sind die Kontaktfederbleche 12 um die Dicke der Abstandselemente 14 voneinander beabstandet und federn dadurch frei und unabhängig voneinander, solange diese nicht aufgrund des Federweges aneinander anstoßen. Weiterhin sind die Kontaktfederbleche 12 derart ausgebildet, dass diese sich über die gesamte Länge des Federbereiches 20 zwischen dem Kontaktende 10 und dem Klemmbereich 16 parallel zueinander erstrecken. An dem freien Kontaktende 10 enden die Kontaktfederbleche 12 in einer gemeinsamen Ebene, welche senkrecht zu einer Längsachse 22 der Kontaktfederbleche 12 im Klemmbereich 16 ausgerichtet ist.The in the Fig. 1 to 4 illustrated, preferred embodiment of a contact spring according to the invention comprises a free contact end 10 for making electrical contact with a more or less flat contact surface (not shown). The contact spring is formed of N = 11 contact plates 12 and N-1 = 10 spacer elements 14. The contact spring plates 12 are held fixed in a clamping region 16, each with a spacer element 14 between two adjacent contact plates 12. For this purpose, a stack or a package of alternately arranged on each other contact spring plates 12 and spacers 14 by means of rivets 18 with each other. The spacer elements 14 extend only over the clamping region 16. The contact spring plates 12 extend beyond the clamping region 16 and form a spring region 20 between the clamping region 16 and the contact end 10. In this spring portion 20, the contact spring plates 12 are spaced apart from each other by the thickness of the spacer elements 14 and thus spring freely and independently of each other, as long as they do not abut each other due to the spring travel. Furthermore, the contact spring plates 12 are formed such that they extend over the entire length of the spring region 20 between the contact end 10 and the clamping region 16 parallel to each other. At the free contact end 10, the contact spring plates 12 end in a common plane, which is aligned perpendicular to a longitudinal axis 22 of the contact spring plates 12 in the clamping region 16.

In dem Federbereich 20 ist der Raum zwischen den Kontaktfederblechen 12 leer, d.h. es ist auch kein Abstandselement 14 vorgesehen, wie insbesondere aus Fig. 3 und 4 ersichtlich. Dieser freie Raum dient zum Einfedern der Kontaktfeder in Richtung der Längsachse 22.In the spring region 20, the space between the contact sheets 12 is empty, that is, no spacer 14 is provided, as in particular from Fig. 3 and 4 seen. This free space is used for compressing the contact spring in the direction of the longitudinal axis 22nd

Erfindungsgemäß weisen die Kontaktfederbleche 12 in dem Federbereich 20 wenigstens einen Knick 24 mit jeweils einem vorbestimmten Winkel 26, 28 zwischen der Längsachse 22 bzw. 23 der Kontaktfederbleche 12 vor dem Knick 24 und der Längsachse 23 der Kontaktfederbleche 12 nach dem Knick 24 auf. Hierbei sind mit dem Bezugszeichen 23 alle Längsachsen nach einem Knick 24 bezeichnet. Mit dem Ausdruck "Winkel" ist zwischen zwei Längsachsen 23 der jeweils kleinere der beiden Komplementärwinkel bei einem Knick 24 gemeint, wie in den Fig. 3 und 4 dargestellt.According to the invention, the contact spring plates 12 in the spring region 20 at least one kink 24 each having a predetermined angle 26, 28 between the longitudinal axis 22 and 23 of the contact spring plates 12 in front of the kink 24 and the longitudinal axis 23 of the contact spring plates 12 after the kink 24. In this case, all longitudinal axes are designated by a kink 24 by the reference numeral 23. By the term "angle" is meant between two longitudinal axes 23 of the respective smaller of the two complementary angles at a kink 24, as in the Fig. 3 and 4 shown.

Ausgehend von dem Kontaktende 10 sind die Kontaktfederbleche 12 jeweils mit einem Schlitz 30 versehen. Der Federweg der erfindungsgemäßen Kontaktfeder wird mit der Dicke der Abstandselemente 14 eingestellt. Die Härte der Feder wird durch die Dicke und Breite der Kontaktfederbleche 12 sowie durch die Anzahl der Kontaktfederbleche 12 eingestellt. Die in dem Ausführungsbeispiel dargestellte Anzahl von N = 11 Kontaktfederblechen 12 ist lediglich beispielhaft. Es ist auch eine Anzahl N von kleiner oder größer 11 möglich, insbesondere 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20.Starting from the contact end 10, the contact spring plates 12 are each provided with a slot 30. The spring travel of the contact spring according to the invention is with the thickness the spacer elements 14 set. The hardness of the spring is adjusted by the thickness and width of the contact spring plates 12 and by the number of contact spring plates 12. The illustrated in the embodiment number of N = 11 contact plates 12 is merely exemplary. A number N of smaller or greater than 11 is also possible, in particular 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20.

Die erfindungsgemäße Hochstrom-Kontaktfeder zeichnet sich durch einen sehr geringen Kontaktwiderstand bei ausreichend großem Materialquerschnitt und geringer Federsteifigkeit aus. Die Kontaktfeder ist bevorzugt zum Antasten (kontaktieren) auf ebenen Flächen, wie beispielsweise Pads bzw. Kontaktflächen von Leiterplatten, geeignet.The high-current contact spring according to the invention is characterized by a very low contact resistance with a sufficiently large material cross-section and low spring stiffness. The contact spring is preferably suitable for touching (contact) on flat surfaces, such as pads or contact surfaces of printed circuit boards.

Die beispielhaft in den Figuren dargestellte Kontaktfeder weist elf Kontaktfederbleche 12 und zehn Abstandselemente bzw. Zwischenbleche 14 auf. Durch den mittleren Schlitz 30 kann die sich durch den Schlitz 30 ergebende linke und rechte Kontaktfederhälfte unabhängig voneinander federn. Dadurch kontaktieren beide Federhälften sicher auf der Kontaktfläche. Die Kontaktfeder bleibt aber weiterhin seitlich stabil. Es können je nach Anwendung auch zwei, drei oder mehr Schlitze 30 vorgesehene sein, wodurch sich eine entsprechende Verdreifachung, Vervierfachung bzw. Vervielfachung der unabhängig voneinander federnden Kontaktfederhälften ergibt.The contact spring shown by way of example in the figures has eleven contact spring plates 12 and ten spacer elements or intermediate plates 14. Through the central slot 30, the resulting through the slot 30 left and right contact spring half spring independently. As a result, both spring halves contact securely on the contact surface. The contact spring remains but laterally stable. Depending on the application, two, three or more slots 30 may also be provided, resulting in a corresponding tripling, quadrupling or multiplication of the independently spring-loaded contact spring halves.

Durch das Aneinanderreihen von mehreren dünnen Kontaktfedern kann man auch bei einem großen Materialquerschnitt geringe Federkräfte und einen großen Federweg erzielen. Die Abstandselemente bzw. Zwischenbleche 14 sorgen für die nötige Beweglichkeit beim Einfedern, indem Sie einen ausreichend großen Spalt 32 zwischen den Kontaktfederblechen 12 sicherstellen.By juxtaposing several thin contact springs can be achieved even with a large material cross section low spring forces and a large spring travel. The spacers or intermediate plates 14 provide the necessary flexibility in compression by ensuring a sufficiently large gap 32 between the contact plates 12.

Die vielen unabhängig federnden Kontaktstellen bilden die Grundlage für einen niedrigen Kontaktwiderstand, da der Kontaktdruck an jeder Kontaktstelle gleichmäßig hoch ist.The many independently resilient contact points form the basis for a low contact resistance, since the contact pressure at each contact point is uniformly high.

Die erfindungsgemäße Kontaktfeder umfasst einen Block aus S-förmig gebogenen Kontaktfederblechen bzw. Einzelfedern 12, wobei die federnde Geometrie bei allen Kontaktfederblechen bzw. Einzelfedern 12 des Blocks identische ist. Es können aber einzelne Kontaktfederblechen 12 noch zusätzliche Querschnitte haben (Anbauten). Es ergibt sich in vorteilhafter Weise ein niedriger Kontaktwiderstand, ein biegesteifer Kontakt senkrecht zur Arbeits- und Kontaktierungsebene sowie eine weiche Feder mit großern Materialquerschnitt und kompakter Gesamtabmessung. Die Federsteifigkeit wird im Wesentlichen durch Materialstärke und die Anzahl der Kontaktfederbleche bzw. Einzelfedern 12 bestimmt. The contact spring according to the invention comprises a block of S-shaped bent contact spring plates or individual springs 12, wherein the resilient geometry is identical in all contact springs or individual springs 12 of the block. However, individual contact plates 12 may have additional cross sections (attachments). It results in an advantageous manner, a low contact resistance, a rigid contact perpendicular to the working and contacting plane as well as a soft spring with a larger material cross-section and a compact overall dimension. The spring stiffness is essentially determined by the material thickness and the number of contact spring plates or individual springs 12.

Fig. 5 und 6 zeigen ein Kontaktierungselement 34, welches mehrere erfindungsgemäße Kontaktfedern aufweist, um parallel mehrere voneinander getrennte elektrische Kontakte herzustellen. Fig. 5 and 6 show a contacting element 34 which has a plurality of contact springs according to the invention to produce a plurality of mutually separate electrical contacts in parallel.

Claims (11)

  1. Contact spring having a free contacting end (10) for making electric contact between this free contacting end (10) and a contact surface, the contact spring being formed by N metal contact-spring lamellae (12) and N-1 spacer elements (14) where N ≥ 2, the metal contact-spring lamellae (12) being held fixed in a clamped region (16) with one spacer element (14) between each two adjacent metal contact-spring lamellae (12), being spaced apart from one another by the thickness of the spacer elements (14) in a resilient region (20), extending parallel to one another in a freely and resiliently flexing manner to the free contacting end (10), and ending in a common plane at the free contacting end (10), characterised in that the metal contact-spring lamellae (12) have, in the resilient region (20), at least one bend (24) at each of which there is a predetermined angle (26, 28) between the longitudinal axis (22, 23) which the metal contact-spring lamellae (12) have upstream of the bend (24) and the longitudinal axis (23) which the metal contact-spring lamellae (12) have downstream of the bend (24).
  2. Contact spring according to claim 1, characterised in that the common plane of the free contacting end (10) is arranged to be perpendicular to a longitudinal axis (22) which the metal contact-spring lamellae and the spacer elements have in the clamped region (16).
  3. Contact spring according to claim 1 or 2, characterised in that the metal contact-spring lamellae (12) have two, three or four bends (24) in the resilient region (20).
  4. Contact spring according to at least one of the preceding claims, characterised in that, starting from the free contacting end (10), at least one of the metal contact-spring lamellae (12), and in particular all of the metal contact-spring lamellae (12), each have at least one slot (30).
  5. Contact spring according to claim 4, characterised in that the at least one slot (30) extends beyond at least one bend (24) in the metal contact-spring lamellae (12).
  6. Contact spring according to claim 4 or 5, characterised in that the at least one slot (30) extends parallel to a longitudinal axis (23) which the metal contact-spring lamellae (12) have in the resilient region (20).
  7. Contact spring according to at least one of the preceding claims, characterised in that the metal contact-spring lamellae (12) and the spacer elements (14) are riveted and/or screwed together in the clamped region (16).
  8. Contact spring according to at least one of the preceding claims, characterised in that the spacer elements (14) extend for part of the clamped region (16) or the entire length of the clamped region (16).
  9. Contact spring according to at least one of the preceding claims, characterised in that the predetermined angle (26, 28) between the longitudinal axis (22, 23) which the metal contact-spring lamellae (12) have upstream of the bend (24) and the longitudinal axis (23) which the metal contact-spring lamellae (12) have downstream of the bend (24) is the same for all the bends (24).
  10. Contact spring according to at least one of the preceding claims, characterised in that, starting from the clamped region (16) and looking in the direction of the contacting end (30), the predetermined angle (26, 28) between the longitudinal axis (22, 23) which the metal
    contact-spring lamellae (12) have upstream of the bend (24) and the longitudinal axis (23) which the metal contact-spring lamellae (12) have downstream of the bend (24) is more than 90° for a first bend (24) and equal to or less than 90° for each further bend (24) in the resilient region (20).
  11. Contact spring according to at least one of the preceding claims, characterised in that the sum of the angles (26, 28) of two successive bends (24) is equal to or more than 180°.
EP09710138A 2008-02-14 2009-01-21 Contact spring Active EP2243146B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202008001997U DE202008001997U1 (en) 2008-02-14 2008-02-14 contact spring
PCT/EP2009/000351 WO2009100807A1 (en) 2008-02-14 2009-01-21 Contact spring

Publications (2)

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EP2243146A1 EP2243146A1 (en) 2010-10-27
EP2243146B1 true EP2243146B1 (en) 2012-06-27

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EP09710138A Active EP2243146B1 (en) 2008-02-14 2009-01-21 Contact spring

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US (1) US8021168B2 (en)
EP (1) EP2243146B1 (en)
KR (1) KR101520347B1 (en)
CN (1) CN101952919B (en)
CA (1) CA2714938C (en)
DE (1) DE202008001997U1 (en)
HK (1) HK1153568A1 (en)
TW (1) TWM360449U (en)
WO (1) WO2009100807A1 (en)

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CA3012299C (en) * 2016-01-31 2022-05-31 Mediwound Ltd. Debriding composition for treating wounds
DE102022116188A1 (en) 2022-06-29 2024-01-04 Harting Electric Stiftung & Co. Kg Contact spring assembly for electrical contact devices

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Also Published As

Publication number Publication date
CN101952919A (en) 2011-01-19
KR101520347B1 (en) 2015-05-14
CN101952919B (en) 2013-01-02
WO2009100807A1 (en) 2009-08-20
HK1153568A1 (en) 2012-03-30
KR20100125319A (en) 2010-11-30
US8021168B2 (en) 2011-09-20
CA2714938A1 (en) 2009-08-20
CA2714938C (en) 2016-09-27
DE202008001997U1 (en) 2008-04-03
US20110028053A1 (en) 2011-02-03
EP2243146A1 (en) 2010-10-27
TWM360449U (en) 2009-07-01

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