EP0921597B1 - Contact spring - Google Patents
Contact spring Download PDFInfo
- Publication number
- EP0921597B1 EP0921597B1 EP98118504A EP98118504A EP0921597B1 EP 0921597 B1 EP0921597 B1 EP 0921597B1 EP 98118504 A EP98118504 A EP 98118504A EP 98118504 A EP98118504 A EP 98118504A EP 0921597 B1 EP0921597 B1 EP 0921597B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- contact
- region
- contact according
- tin
- 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.)
- Expired - Lifetime
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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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/10—Sockets for co-operation with pins or blades
- H01R13/11—Resilient sockets
- H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
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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
- H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
-
- 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
- H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket
Definitions
- the invention relates to a contact spring with a Basic spring with a central one, of a rectangular one Frame formed spring arm base is provided at the molded on one end a connector for electrical conductors and two at the opposite end connect molded spring arms to the broad sides of the spring arm base, which converge towards each other towards the free end to run and then join a funnel open, the spring arms each in the area of the contact zone by arranged on the longitudinal edges facing each other Keep impressions at a distance as well as from one with the spring arm base connected locking sleeve are included.
- a contact spring is the beginning mentioned type with resilient contact legs for Contact knife known for high current carrying capacity, at which the aforementioned requirements are largely met.
- this known contact spring shown that the contact force after a certain The number of plugging operations is still> 3N and thus the specified holding force for an inserted knife contact not less than, but it should be noted that the required insertion force increases to approx. 10N and as a result handling impaired. This can result in circumstances the connection may be faulty or at lower holding force loosen or be interrupted.
- the invention is based on this prior art the task of a contact spring of the aforementioned Art to create that is simple in design and with reasonable Effort can be produced.
- the opening angle of the Plug funnel over its entire extent is ⁇ ⁇ 30 ° and that the spring arms crowned in the area of the contact zone are shaped and each form a contact tip.
- the indication "over its entire extent” means that the sides or legs of the funnel quasi run linearly without curvature or kink, the opening angle between the legs as pointed as possible, that is small, should be.
- the spring arms are domed in the area of the contact zone.
- the contact zone is the area where the Plug contact cooperates with the assigned knife contact.
- the layer thickness is about 1.5 ⁇ m.
- the tin layer as so-called fire tinning, that is in the molten liquid Tin bath, applied.
- Tin is known to be a good conductive metal, but it is it is mechanically unstable because of its low weight Strength only low wear resistance offers.
- the tin layer in the area of the contact tip is mechanically compressed by means of embossing.
- the tin layer can advantageously at least mechanically compressed area have an intermetallic phase, their share in relation to the total shift volume Is 50% to 75%. This intermetallic phase also contributes to increase the strength of the very soft Tin layer at.
- the spring arms of the contact spring according to the invention each of two mutually parallel spring legs formed on are formed on the broad sides of the spring arm base and by a longitudinal gap are separated from each other, the spring legs one spring arm per contact spring at its free end are connected by means of a web.
- the opposite have wedge-shaped spring arms two elongated strips each, each with a spring leg form and are connected to the spring arm base. These spring legs are through one to their free end Longitudinal gap separated from each other. However, one of the two pairs of strips, each forming a spring arm, of the longitudinal gap closed at the free end by a cross bar.
- the contact spring according to the invention is included provided with a locking sleeve, which with positive and non-positive the spring arm base works together and serves the installation the contact spring in the existing mounting openings of the housing and the like.
- Fig. 1 is a contact spring 10 according to the invention with a Locking sleeve 12 shown in side view, which has a base spring 14 is pushed over and with this non-positive and positive cooperates.
- the contact spring 10 has a in a conventional manner Spring arm base 16, at the rear end of which one in its Design already known as a crimp connection part 18 is integrally formed to connect a not shown electrical conductor is used.
- the base spring 14 of the contact spring 10 is alone, that is, shown without a locking sleeve 12, in side view.
- the design according to the invention relates essentially to How the spring arms 20 are made. About here gives the enlarged section shown in FIG. 3 Outcrop and on the other hand the cross section shown in Fig. 4 along section line II-II in FIG. 2.
- FIG. 3 shows, as already indicated above, an enlarged detail "A" from Fig. 2.
- the insertion funnel 24 on an enlarged scale from the side shown. From this representation it is clear that the course the side walls of the hopper 24 from the starting point in the so-called contact zone 30 to the free End is steady, that is, runs without kinks or curvature.
- the opening angle is at most 30 °, which is advantageously achieved that when inserting an associated one, shown schematically in FIG. 3 Knife contact 32, this not or only at most the smallest possible angle on the flanks of the insertion funnel 24 hits, so that the invention at least provided on the spring arms 20 coating Tin is not damaged, for example by scraping or Pushing off the insertion edge of the knife contact 32.
- This very clear sliding process is favored by that the tin layer in the area of the contact zone 30 compacted by mechanical stamping, i.e. strain hardened, is. On the one hand, this ensures that the wear resistance of the tin, which is known to be very soft is increased, and secondly, that the surface quality of the melt on the contact spring 10 or but at least applied to the spring arms 20 Zinns is improved and so the sliding resistance for the contact knife 32 is reduced.
- FIG. 4 shows a cross section through the base spring 14 along section line II-II in FIG. 2 and discloses that on the flat broad side of the spring arm base 16 molded spring arms 20 at least in the area of Cutting plane, which intersects the contact zone 30, spherically shaped are and each form a contact tip 33. Further is shown that the spring arms 20 as a strip-shaped spring legs 34 are formed, which are formed by a gap 36 are separated from each other.
- 1 to 4 is the already mentioned tin layer not shown in detail, since it is only a thickness of a few ⁇ m, preferably about 1.5 ⁇ m. But this is supposed to be the case not be understood to mean that the tin layer is insignificant for the invention. Rather, how explained above, the tin layer and its strength-increasing and surface-promoting treatment of considerable Significance for the present contact spring according to the invention 10th
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- Manufacturing Of Electrical Connectors (AREA)
- Measuring Leads Or Probes (AREA)
Description
Die Erfindung betrifft eine Kontaktfeder, die mit einer Grundfeder mit einer mittig angeordneten, von einem rechteckförmigen Rahmen gebildeten Federarmbasis versehen ist, an deren einem Ende ein Anschlußteil für elektrische Leiter angeformt ist und an deren entgegengesetztem Ende jeweils zwei an den Breitseiten der Federarmbasis angeformte Federarme anschließen, welche zum freien Ende hin konvergierend aufeinander zu laufen und anschließend sich zu einem Stecktrichter öffnen, wobei die Federarme jeweils im Bereich der Kontaktzone durch jeweils an den Längskanten angeordnete, einander zugewandte Eindrückungen auf Abstand gehalten sowie von einer mit der Federarmbasis verbundenen Rasthülse umfaßt sind.The invention relates to a contact spring with a Basic spring with a central one, of a rectangular one Frame formed spring arm base is provided at the molded on one end a connector for electrical conductors and two at the opposite end connect molded spring arms to the broad sides of the spring arm base, which converge towards each other towards the free end to run and then join a funnel open, the spring arms each in the area of the contact zone by arranged on the longitudinal edges facing each other Keep impressions at a distance as well as from one with the spring arm base connected locking sleeve are included.
Es ist allgemein bekannt, daß bei lösbaren elektrischen Kontaktierungsvorrichtungen, insbesondere bei solchen von einem Aufnahmeteil, wie eine Kontaktfeder, und einem Verbindungsteil, wie ein Kontaktmesser, gebildeten Steckvorrichtungen, die Kontaktkraft von entscheidender Bedeutung ist für die Zuverlässigkeit der elektrischen Verbindung.It is generally known that with detachable electrical contacting devices, especially those of one Receiving part, such as a contact spring, and a connecting part, like a contact knife, formed connectors, contact power is critical to reliability the electrical connection.
Hinzukommt die Forderung nach gut leitfähigen, das heißt nach nicht korrodierten oder nicht verzunderten, Kontaktflächen, um einen störungsfreien Stromübergang an der Kontaktfläche sicherzustellen und den Übergangswiderstand zu minimieren.Added to this is the demand for good conductivity, that is to say non-corroded or not scaled, contact surfaces, for a trouble-free current transfer at the contact surface ensure and minimize the contact resistance.
Darüber hinaus sollen als Steckvorrichtung ausgebildete lösbare Kontakte einfach zu handhaben sein, sowohl bei der Fertigung der elektrischen Anschlüsse als auch beim Herstellen der Steckverbindung.In addition, designed as a plug-in device releasable Contacts to be easy to handle, both in manufacturing the electrical connections as well as when manufacturing the connector.
Aus der DE 196 11 698 A1 ist eine Kontaktfeder der eingangs genannten Art mit beidseitig federnden Kontaktschenkeln für Kontaktmesser für hohe Stromtragfähgkeit bekannt, bei welcher die vorgenannten Anforderungen weitestgehend erfüllt sind. Allerdings hat sich bei der Benutzung dieser bekannten Kontaktfeder gezeigt, daß die Kontaktkraft nach einer bestimmten Anzahl von Steckvorgängen zwar immer noch bei > 3N liegt und somit die vorgegebene Haltekraft für einen eingeführten Messerkontakt nicht unterschreitet, doch ist festzustellen, daß die erforderliche Steckkraft auf ca. 10N ansteigt und hierdurch die Handhabung beeinträchtigt. Hierdurch kann unter Umständen die Verbindung fehlerhaft sein beziehungsweise bei zu niedriger Haltekraft sich lockern oder unterbrochen werden.From DE 196 11 698 A1 a contact spring is the beginning mentioned type with resilient contact legs for Contact knife known for high current carrying capacity, at which the aforementioned requirements are largely met. However, when using this known contact spring shown that the contact force after a certain The number of plugging operations is still> 3N and thus the specified holding force for an inserted knife contact not less than, but it should be noted that the required insertion force increases to approx. 10N and as a result handling impaired. This can result in circumstances the connection may be faulty or at lower holding force loosen or be interrupted.
Ausgehend von diesem Stand der Technik stellt sich der Erfindung die Aufgabe, eine Kontaktfeder der eingangs genannten Art zu schaffen, die einfach gestaltet und mit vertretbarem Aufwand herstellbar ist.The invention is based on this prior art the task of a contact spring of the aforementioned Art to create that is simple in design and with reasonable Effort can be produced.
Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Patentanspruchs 1. Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind in den hiervon abhängigen Unteransprüchen behandelt.This object is achieved by the characterizing Features of claim 1. Further advantageous Refinements and improvements of the invention are dealt with in the dependent claims dependent thereon.
Demgemäß ist vorgesehen, daß der Öffnungswinkel des Stecktrichters über dessen gesamte Erstreckung α < 30° beträgt und daß die Federarme im Bereich der Kontaktzone ballig geformt sind und jeweils eine Kontaktkuppe bilden.Accordingly, it is provided that the opening angle of the Plug funnel over its entire extent is α <30 ° and that the spring arms crowned in the area of the contact zone are shaped and each form a contact tip.
Hierbei bedeutet die Angabe "über dessen gesamte Erstrekkung", daß die Seiten oder Schenkel des Stecktrichters quasi linear verlaufen ohne Krümmung oder Knick, wobei der Öffnungswinkel zwischen den Schenkeln möglichst spitz, das heißt klein, sein soll.Here, the indication "over its entire extent" means that the sides or legs of the funnel quasi run linearly without curvature or kink, the opening angle between the legs as pointed as possible, that is small, should be.
Um die Kontaktsicherheit für alle Fälle zu gewährleisten, sind die Federarme im Bereich der Kontaktzone kuppig gewölbt. Die Kontaktzone ist hierbei der Bereich, an welchem der Steckkontakt mit dem zugeordneten Messerkontakt zusammenarbeitet. Durch die gewölbten Kontaktflächen der Schenkel wird sichergestellt, daß unabhängig von der Einstecklage des betreffenden Kontaktmessers stets ein ausreichender elektrischer Kontakt besteht, so daß Störungen bei der elektrischen Leistungs- und/oder Signalübertragung praktisch verhindert sind.To ensure contact security in all cases, the spring arms are domed in the area of the contact zone. The contact zone is the area where the Plug contact cooperates with the assigned knife contact. Through the arched contact surfaces of the legs ensured that regardless of the insertion position of the concerned Contact knife always a sufficient electrical There is contact, so that interference with the electrical Power and / or signal transmission practically prevented are.
Um darüber hinaus die Kontaktsicherheit zu verbessern sind in weiterer Ausgestaltung der Erfindung zumindest die Federarme mit einer Zinnschicht allseitig bedeckt, wobei die Schichtdicke etwa 1,5 µm beträgt. Vorzugsweise wird die Zinnschicht als sogenannte Feuerverzinnung, das heißt im schmelzflüssigen Zinnbad, aufgebracht.In order to further improve contact security are in a further embodiment of the invention at least the spring arms covered on all sides with a layer of tin, the layer thickness is about 1.5 µm. Preferably the tin layer as so-called fire tinning, that is in the molten liquid Tin bath, applied.
Bekanntlich ist Zinn zwar ein gut leitendes Metall, doch ist es mechanisch nur wenig beanspruchbar, da es wegen seiner geringen Festigkeit nur einen niedrigen Verschleißwiderstand bietet. Um dieser Verschleißanfälligkeit vorzubeugen, kann gemäß einer bevorzugten Weiterbildung der Erfindung vorgesehen sein, daß die Zinnschicht im Bereich der Kontaktkuppe mittels Prägen mechanisch verdichtet ist.Tin is known to be a good conductive metal, but it is it is mechanically unstable because of its low weight Strength only low wear resistance offers. In order to prevent this susceptibility to wear, provided according to a preferred development of the invention be that the tin layer in the area of the contact tip is mechanically compressed by means of embossing.
Durch dieses als Kaltverfestigung bezeichnete Prägen verringert sich die Zinnschicht zwar örtlich um ca. 0,3 µm gegenüber dem nicht verdichteten Bereich, doch wird hierdurch ein beträchtlicher Anstieg der Verschleißbeständigkeit bewirkt, so daß die so behandelte Oberfläche einen geringen Reibverschleiß aufweist und durchriebfest ist. Ferner weist die Zinnschicht eine geglättete Oberfläche auf.Reduced by this stamping, known as work hardening the tin layer compared to each other locally by approx. 0.3 µm the uncompressed area, but this makes a causes a considerable increase in wear resistance, so that the surface treated in this way has little rubbing wear has and is resistant to abrasion. Furthermore, the Tin layer on a smooth surface.
Hierdurch wird bei gleichzeitiger Beibehaltung des guten Korrosionsschutzes durch die Zinnschicht außerdem eine merkliche Reduzierung der erforderlichen Steck- und Ziehkräfte der einzusteckenden beziehungsweise herauszuziehenden Kontaktmesser erreicht.This is while maintaining good corrosion protection due to the tin layer also a noticeable Reduction of the required plug-in and pulling forces of the inserted ones or pull out contact knife reached.
Vorteilhafterweise kann die Zinnschicht zumindest im mechanisch verdichteten Bereich eine intermetallische Phase aufweisen, deren Anteil in bezug auf das gesamte Schichtvolumen 50% bis 75% beträgt. Diese intermetallische Phase trägt zusätzlich zu einer Festigkeitssteigerung der an sich sehr weichen Zinnschicht bei.The tin layer can advantageously at least mechanically compressed area have an intermetallic phase, their share in relation to the total shift volume Is 50% to 75%. This intermetallic phase also contributes to increase the strength of the very soft Tin layer at.
Gemäß einer bevorzugten Ausführungsform der Erfindung sind die Federarme der erfindungsgemäßen Kontaktfeder jeweils von zwei zueinander parallelen Federschenkeln gebildet, welche an den Breitseiten der Federarmbasis angeformt sind und durch einen Längsspalt voneinander getrennt sind, wobei die Federschenkel eines Federarmes je Kontaktfeder an ihrem freien Ende mittels eines Steges verbunden sind.According to a preferred embodiment of the invention the spring arms of the contact spring according to the invention each of two mutually parallel spring legs formed on are formed on the broad sides of the spring arm base and by a longitudinal gap are separated from each other, the spring legs one spring arm per contact spring at its free end are connected by means of a web.
Mit anderen Worten, die einander gegenüberliegend angeordneten, keilförmig aufeinander zulaufenden Federarme besitzen jeweils zwei längliche Streifen, die jeweils einen Federschenkel bilden und mit der Federarmbasis verbunden sind. Diese Federschenkel sind bis zu ihrem freien Ende durch einen Längsspalt voneinander getrennt. Allerdings ist bei einem der beiden, je einen Federarm bildenden Streifenpaare der Längsspalt am freien Ende durch einen Quersteg verschlossen.In other words, the opposite, have wedge-shaped spring arms two elongated strips each, each with a spring leg form and are connected to the spring arm base. These spring legs are through one to their free end Longitudinal gap separated from each other. However, one of the two pairs of strips, each forming a spring arm, of the longitudinal gap closed at the free end by a cross bar.
Hierbei ist in bevorzugter Weiterbildung der Erfindung jeder Federschenkel im Bereich der Kontaktzone ballig gewölbt und bildet eine Kontaktkuppe, wodurch die zuvor erläuterte Kontaktsicherheit nicht nur gewährleistet, sondern sogar verbessert ist, da die Elastizität zweier Federschenkelpaare zwangsläufig ein günstigeres Betriebsverhalten hat als zwei einzelne Federarme.In a preferred development of the invention, everyone is here Spring legs arched in the area of the contact zone and forms a contact tip, whereby the previously explained contact security not only guaranteed, but even improved is because the elasticity of two pairs of spring legs inevitably has more favorable operating behavior than two single spring arms.
In bewährter Weise ist die erfindungsgemäße Kontaktfeder mit einer Rasthülse versehen, welche form- und kraftschlüssig mit der Federarmbasis zusammenarbeitet und dazu dient, den Einbau der Kontaktfeder in vorhandene Montageöffnungen von Gehäusen und dergleichen zu sichern.In a proven manner, the contact spring according to the invention is included provided with a locking sleeve, which with positive and non-positive the spring arm base works together and serves the installation the contact spring in the existing mounting openings of the housing and the like.
Diese und weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind Gegenstand der Unteransprüche. These and other advantageous refinements and improvements the invention are the subject of the dependent claims.
Anhand eines in der schematischen Zeichnung dargestellten Ausführungsbeispieles sollen die Erfindung, vorteilhafte Ausgestaltungen und besondere Vorteile der Erfindung näher erläutert und beschrieben werden. Es zeigen:
- Fig. 1
- eine Seitenansicht einer erfindungsgemäßen Kontaktfeder mit angesetzter Rasthülse;
- Fig. 2
- eine Seitenansicht einer Grundfeder einer erfindungsgemäßen Kontaktfeder;
- Fig. 3
- eine Ausschnittvergrößerung "A" aus Fig. 2; und
- Fig. 4
- einen Querschnitt durch eine Kontaktfeder entlang Schnittlinie II-II in Fig. 2.
- Fig. 1
- a side view of a contact spring according to the invention with attached locking sleeve;
- Fig. 2
- a side view of a base spring of a contact spring according to the invention;
- Fig. 3
- an enlarged detail "A" from Fig. 2; and
- Fig. 4
- 3 shows a cross section through a contact spring along section line II-II in FIG. 2.
In Fig. 1 ist eine erfindungsgemäße Kontaktfeder 10 mit einer
Rasthülse 12 in Seitenansicht gezeigt, die über eine Grundfeder
14 übergeschoben ist und mit dieser kraft- und formschlüssig
zusammenarbeitet.In Fig. 1 is a
Die Kontaktfeder 10 besitzt in an sich bekannter Weise eine
Federarmbasis 16, an welcher am rückwärtigen Ende ein in seiner
Gestaltung bereits als Crimpanschluß bekanntes Anschlußteil
18 angeformt ist, das zum Anschluß eines nicht dargestellten
elektrischen Leiters dient.The
An der Frontseite der Federarmbasis 16, die von einem kastenförmigen
rechteckigen Rahmen gebildet ist, sind jeweils an
den flachen Breitseiten etwa gleich breite Federarme 20 mit
entsprechend breiten Kontaktflächen 22 angeformt, deren freie
Enden keilförmig einander zugeneigt sind und sich bei etwa
2/3 bis 3/4 ihrer Länge wieder zu einem Einstecktrichter 24
trichterförmig erweitern. Hierbei stützen sie sich mittels an
den Seitenkanten 26 der Federarme 20 befindlicher, als Eindrückungen
bezeichneter Einformungen 28 gegenseitig ab, so
daß zwischen den Kontaktflächen 22 der Federarme 20 ein gewisser
Abstand besteht.At the front of the
Die weiteren in Fig. 1 gezeigten Merkmale, insbesondere die
der Rasthülse 12 und des Anschlußteils 18 sind an sich im
Stand der Technik allgemein bekannt, so daß hierauf nicht näher
einzugehen ist. Im übrigen sind für gleiche Merkmale
stets die gleichen Bezugsziffern verwendet.The further features shown in Fig. 1, in particular the
the
In Fig. 2 ist die Grundfeder 14 der Kontaktfeder 10 allein,
das heißt ohne Rasthülse 12, in Seitenansicht dargestellt.
Die erfindungsgemäße Gestaltung betrifft im wesentlichen die
Art und Weise, wie die Federarme 20 beschaffen sind. Hierüber
gibt zum einen die in Fig. 3 gezeigte Ausschnittvergrößerung
Aufschluß und zum anderen der in Fig. 4 gezeigte Querschnitt
entlang Schnittlinie II-II in Fig. 2.2, the
Die Fig. 3 zeigt, wie bereits vorstehend angegeben, eine Ausschnittvergrößerung
"A" aus Fig. 2. In dieser Darstellung ist
der Einstecktrichter 24 in vergrößertem Maßstab von der Seite
gezeigt. Aus dieser Darstellung wird deutlich, daß der Verlauf
der Seitenwände des Einstecktrichters 24 vom Ausgangspunkt
in der so bezeichneten Kontaktzone 30 bis zum freien
Ende stetig ist, das heißt ohne Knicke oder Krümmung verläuft.3 shows, as already indicated above, an enlarged detail
"A" from Fig. 2. In this illustration
the
Der Öffnungswinkel beträgt dabei erfindungsgemäß höchstens
30°, wodurch vorteilhafterweise erreicht wird, daß beim Einstecken
eines zugeordneten, in Fig. 3 schematisch dargestellten
Messerkontakts 32, dieser nicht oder nur allenfalls unter
einem möglichst geringen Winkel auf die Flanken des Einstecktrichters
24 auftrifft, so daß die erfindungsgemäß zumindest
an den Federarmen 20 vorgesehene Beschichtung mit
Zinn nicht beschädigt wird, zum Beispiel durch Abschaben oder
Abstoßen der Einsteckkante des Messerkontakts 32. According to the invention, the opening angle is at most
30 °, which is advantageously achieved that when inserting
an associated one, shown schematically in FIG. 3
Vielmehr wird mit diesem spitzen Öffnungswinkel erreicht, daß
das Kontaktmesser 32 in die von den federnd aneinander liegenden
Federarmen gebildete Kontaktöffnung beim Einstecken
gleichsam hineingleitet.Rather, it is achieved with this acute opening angle that
the
Dieser sehr anschauliche Gleitvorgang wird dadurch begünstigt,
daß die Zinnschicht im Bereich der Kontaktzone 30
durch mechanisches Prägen verdichtet, das heißt kaltverfestigt,
ist. Hierdurch wird zum einen erreicht, daß der Verschleißwiderstand
des bekanntlich sehr weichen Zinns beträchtlich
gesteigert wird, und zum anderen, daß die Oberflächengüte
des im Schmelzbad auf die Kontaktfeder 10 beziehungsweise
zumindest aber auf die Federarme 20 aufgebrachten
Zinns verbessert ist und so der Gleitwiderstand für das Kontaktmesser
32 herabgesetzt ist.This very clear sliding process is favored by
that the tin layer in the area of the
Die in Fig. 4 gezeigte Darstellung zeigt einen Querschnitt
durch die Grundfeder 14 entlang Schnittlinie II-II in Fig. 2
und offenbart, daß die an der flachen Breitseite der Federarmbasis
16 angeformten Federarme 20 zumindest im Bereich der
Schnittebene, welche die Kontaktzone 30 schneidet, ballig geformt
sind und jeweils eine Kontaktkuppe 33 bilden. Ferner
ist gezeigt daß die Federarme 20 als streifenförmige Federschenkel
34 ausgebildet sind, welche durch einen Spalt 36
voneinander getrennt sind.The illustration shown in FIG. 4 shows a cross section
through the
Hierbei ist ferner zu erkennen, daß die in Fig. 4 dargestellten
unteren Federschenkel 34 mittels eines Steges 38 miteinander
verbunden sind, der an deren freiem Ende angeordnet
ist. Hierdurch erhält die Grundfeder 14 der erfindungsgemäßen
Kontaktfeder 10 eine verbesserte Stabilität, die durch die
Federarme 20 sowie die Federarmbasis 16 umfassende Rasthülse
12 unterstützt wird.It can also be seen here that those shown in Fig. 4
Außerdem geht aus der Darstellung in Fig. 4 hervor, daß die
Federschenkel 34 im Bereich der Kontaktzone 30 ballig gewölbt
sind und eine Kontaktkuppe 33 bilden. It is also apparent from the illustration in Fig. 4 that the
In den Fig. 1 bis 4 ist die bereits erwähnte Zinnschicht nicht näher gezeigt, da sie lediglich eine Dicke von wenigen µm, vorzugsweise etwa 1,5 µm, erreicht. Doch soll dieser Umstand nicht dahingehend verstanden werden, daß die Zinnschicht unbedeutend für die Erfindung ist. Vielmehr ist, wie vorstehend erläutert, die Zinnschicht sowie ihre festigkeitssteigernde und oberflächenbegünstigende Behandlung von erheblicher Bedeutung für die vorliegende erfindungsgemäße Kontaktfeder 10.1 to 4 is the already mentioned tin layer not shown in detail, since it is only a thickness of a few µm, preferably about 1.5 µm. But this is supposed to be the case not be understood to mean that the tin layer is insignificant for the invention. Rather, how explained above, the tin layer and its strength-increasing and surface-promoting treatment of considerable Significance for the present contact spring according to the invention 10th
Claims (11)
- A spring contact (10) having a base spring (14) with a centrally arranged spring arm base (16) formed by a rectangular frame, having a terminal part (18) integrally formed thereon at one end for electrical conductors, and having two spring arms (20, 34) which are integrally formed at the opposing end in each case on the long sides of the spring arm base (16) and which converge towards one another in the direction of the free end in a wedge shape and then open into a pluggable funnel shape (24), in which the spring arms (20, 34) are each held at a spacing in the region of the contact zone (30) by inwardly pressing elements (28) facing one another and arranged on the longitudinal edges (26), and having a latching sleeve (12) which encloses the spring arm base (16) and the spring arms (20) integrally formed thereon,
characterised in that the angle of opening of the pluggable funnel shape (24) is < 30° over the entire extent α thereof and in that the spring arms (20, 34) are convexly shaped in the region of the contact zone (30) and each form a contact cap (33). - A spring contact according to Claim 1, characterised in that at least the spring arms (20, 34) are coated on all sides with a layer of tin.
- A spring contact according to Claim 2, characterised in that the layer of tin is mechanically compressed in the region of the contact cap (33) by stamping.
- A spring contact according to either of Claims 2 or 3, characterised in that the layer of tin has a smoothed surface.
- A spring contact according to either of Claims 3 or 4, characterised in that the layer of tin is approximately 0.3 µm smaller in the region of the contact cap (33) as a result of the mechanical compression than in the uncompressed region.
- A spring contact according to one of Claims 2 to 5, characterised in that the layer of tin has, at least in the mechanically compressed region, an intermetallic phase whereof the proportion is 50 to 75% of the total layer volume.
- A spring contact according to one of the preceding claims, characterised in that the spring arms (20, 34) integrally formed on the long sides of the spring arm base (16) are each formed by two mutually parallel spring limbs (34).
- A spring contact according to Claim 7, characterised in that the spring limbs (34) of a spring arm (20) are separated from one another by an elongate gap (36).
- A spring contact according to one of Claims 7 or 8, characterised in that the spring limbs (34) of a spring arm (20) for each spring contact (10) are connected at their free end by means of a web (38).
- A spring contact according to one of Claims 7 to 9, characterised in that each spring limb (34) is curved into a convex shape in the region of the contact zone (30) and forms a contact cap (33).
- A spring contact according to one of the preceding claims, characterised in that the latching sleeve (12) cooperates form-fittingly and force-fittingly with the spring arm base (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19753459 | 1997-12-02 | ||
| DE19753459 | 1997-12-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0921597A1 EP0921597A1 (en) | 1999-06-09 |
| EP0921597B1 true EP0921597B1 (en) | 2003-04-09 |
Family
ID=7850511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98118504A Expired - Lifetime EP0921597B1 (en) | 1997-12-02 | 1998-09-30 | Contact spring |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6217395B1 (en) |
| EP (1) | EP0921597B1 (en) |
| JP (1) | JPH11224710A (en) |
| KR (1) | KR100348021B1 (en) |
| DE (1) | DE59807845D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022107669A1 (en) | 2022-03-31 | 2023-10-05 | Bjb Gmbh & Co. Kg | Plug connection, in particular for a direct current connection, plug contact and method for producing it |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4330390C2 (en) * | 1993-09-08 | 1995-10-26 | Erni Elektroapp | One-piece, two-leg contact spring |
| US6475042B1 (en) * | 2001-12-10 | 2002-11-05 | Hon Hai Precision Ind. Co., Ltd. | High-speed electrical connector |
| US6752668B2 (en) | 2002-08-14 | 2004-06-22 | Konnektech, Ltd. | Electrical connector |
| CN104054219B (en) * | 2012-01-13 | 2016-07-06 | 矢崎总业株式会社 | Electric connector and manufacture method thereof |
| US20190273341A1 (en) * | 2018-03-01 | 2019-09-05 | Dell Products L.P. | High Speed Connector |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0675417B2 (en) * | 1992-05-21 | 1994-09-21 | 山一電機株式会社 | Socket contact |
| DE9211819U1 (en) * | 1992-07-07 | 1993-11-04 | Grote & Hartmann | Electrical contact element |
| US5256088A (en) * | 1992-11-30 | 1993-10-26 | Foxconn International, Inc. | Contact for IC memory card |
| GB9315160D0 (en) * | 1993-07-22 | 1993-09-08 | Amp Gmbh | Electrical terminal for use with short circuit spring contacts |
| DE19535960C2 (en) * | 1995-09-27 | 1997-07-17 | Siemens Ag | Contact spring with contact opening |
| DE19611698A1 (en) * | 1996-03-25 | 1997-10-02 | Siemens Ag | Contact spring |
| DE29719153U1 (en) * | 1997-10-28 | 1999-03-04 | Grote & Hartmann Gmbh & Co Kg, 42369 Wuppertal | Miniaturized plug contact element |
-
1998
- 1998-09-30 EP EP98118504A patent/EP0921597B1/en not_active Expired - Lifetime
- 1998-09-30 DE DE59807845T patent/DE59807845D1/en not_active Expired - Fee Related
- 1998-11-30 JP JP10340037A patent/JPH11224710A/en not_active Withdrawn
- 1998-12-02 KR KR1019980052454A patent/KR100348021B1/en not_active IP Right Cessation
- 1998-12-02 US US09/204,409 patent/US6217395B1/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022107669A1 (en) | 2022-03-31 | 2023-10-05 | Bjb Gmbh & Co. Kg | Plug connection, in particular for a direct current connection, plug contact and method for producing it |
| DE102022107669B4 (en) | 2022-03-31 | 2023-11-30 | Bjb Gmbh & Co. Kg | Plug connection, in particular for a direct current connection, plug contact and method for producing it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11224710A (en) | 1999-08-17 |
| KR100348021B1 (en) | 2002-11-18 |
| US6217395B1 (en) | 2001-04-17 |
| KR19990062706A (en) | 1999-07-26 |
| EP0921597A1 (en) | 1999-06-09 |
| DE59807845D1 (en) | 2003-05-15 |
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