EP0416306B1 - Electrical contact member - Google Patents
Electrical contact member Download PDFInfo
- Publication number
- EP0416306B1 EP0416306B1 EP90115232A EP90115232A EP0416306B1 EP 0416306 B1 EP0416306 B1 EP 0416306B1 EP 90115232 A EP90115232 A EP 90115232A EP 90115232 A EP90115232 A EP 90115232A EP 0416306 B1 EP0416306 B1 EP 0416306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact element
- electrical contact
- spring
- fork spring
- aperture
- 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
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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
- 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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
- H01R4/245—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions
- H01R4/2454—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions forming a U-shape with slotted branches
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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
- 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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
- H01R4/245—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions
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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
- H01R13/10—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
Definitions
- the invention relates to an electrical contact element to be arranged in a chamber of a plastic housing and bent from a flat sheet-metal stamped part in insulation displacement technology of an electrical cable plug connection, a flat fork spring defining an insertion slot for the insulation displacement contacting of an electrical cable between its two fork spring legs which can be elastically bent out in the plane of the fork spring is surrounded by insulation, and wherein the flat fork spring has an opening.
- Electrical contact elements in the so-called insulation displacement technology for electrical cable plug connections are known. They are punched out of a sheet and bent according to the given shape. An electrical contact element produced in this way is then arranged in a corresponding chamber of a plastic housing of the cable plug connection, after which the corresponding electrical cable is contacted on the electrical contact element in insulation displacement technology.
- the electrical contact element has at least one fork spring, which defines an insertion slot between them, the mutually facing edges of the two fork spring legs being sharpened. To make contact with the electrical cable, insert it into the insertion slot the fork spring inserted so that the cutting of the two fork spring legs carve the cable insulation so that they come into electrical contact with the electrical conductor. The two fork spring legs exert a clamping force on the electrical conductor so that it is held in the insertion slot.
- the fork spring legs of the fork spring are formed by punching out a slot that is open at one end, the spring travel of the two legs is small due to the small effective spring length and thus lever arm length. Since the two fork spring legs can thus only slightly move out of their position and the width of the insertion slot can therefore only be increased to a small extent due to the low flexibility of the fork spring legs, the insertion of the electrical cable to be contacted is thereby made more difficult. This applies in particular when electrical cables with different conductor diameters are to be contacted in one and the same type of electrical contact element.
- the two fork spring legs due to their low flexibility due to the low spring travel, reduce the contact pressure, especially on a strand bundle, with the internal stability of the strand bundle decreasing over a long period of time, and due to the fact that the contact pressure of the fork spring legs decreases over time due to material fatigue (relaxation) will be poorly maintained.
- the insulation displacement contact of the electrical conductors is poor in the known electrical contact elements.
- a generic contact element is known from US-A-40 66 317. It is a contact element with relatively long fork spring legs. Below the fork spring there is an opening, leaving an intermediate web, which serves to be able to bend the previously known contact element in this area slightly by about 90 ° in order to prepare it for installation in a corresponding plug element.
- this opening cannot improve the insulation displacement contact of the contact element, since the perforated area is bent, so that the remaining legs no longer have any mobility, since they are fixed by the parts which are angled by approximately 90 °.
- EP-A-02 03 639 Another contact element is known from EP-A-02 03 639, which comprises a fork spring which is open in the idle state and which is compressed in the state inserted into a housing. A further insertion slot in the form of an opening is formed below the insertion slot. A solid web remains between the two insertion slots. Since the insulation displacement contacting is brought about by compressing the fork spring, the rest of the contact element area has no influence on the contacting quality.
- the object of the invention is to further develop the known electrical contact element using insulation displacement technology of an electrical cable plug connection to the effect that the insulation displacement contacting of the electrical cables is improved.
- An electrical contact element designed according to this technical teaching in insulation displacement technology of an electrical cable plug connection has the advantage that, with regard to the known fork springs, the spring travel and thus the flexibility of the fork spring legs is increased while maintaining the clamping force, so that the insulation displacement contacting of the electrical cable is improved overall. This is due to the formation of the additional opening in the fork spring, an intermediate web being left between this opening and the insertion slot. Since the clamping force depends directly on the design of the insertion slot and on the design of the fork spring legs delimiting the insertion slot, but not through the formation of an additional opening with the fork spring, the clamping force is not impaired by the additional opening and therefore remains the same.
- the additional opening forms two pivot points or joints, namely the first pivot point or the first joint in the region of the intermediate web between the insertion slot and the opening and the second pivot point or the second joint in the region of the end of the additional opening facing away from the insertion slot.
- the opening is preferably symmetrical to the longitudinal axis of the insertion slot. This has the advantage that the same conditions prevail in both fork spring legs of the fork spring.
- the opening preferably extends directly to the insertion slot.
- the opening is essentially designed as an elongated slot which, in a further development, tapers towards the insertion slot.
- the opening has an essentially triangular shape.
- the slot forming the opening can preferably taper substantially at the end facing away from the insertion slot, so that overall an optimal bending behavior results.
- the invention further relates to an electrical cable plug connection with at least one electrical contact element arranged in a chamber of a plastic housing, which is designed in the manner described above.
- FIGS. 3a and 3b show an embodiment of an electrical contact element using insulation displacement technology of an electrical cable connector, while the special properties of the electrical contact element are to be explained with reference to FIGS. 3a and 3b.
- the electrical contact element 1 in FIGS. 1 and 2 consists of a stamped sheet metal part, from which the electrical contact element 1 is bent by successive bending processes. From the flat sheet metal stamping is then obtained an electrical contact element 1, as shown in FIGS. 1 and 2.
- This electrical contact element 1 has two pairs of spring tongues 2, between which, for example, the contact pin of a plug of the electrical plug connection for electrical contacting can be inserted.
- These spring tongues 2 are formed in a conventional manner.
- the electrical contact element In order to be able to contact an electrical cable 3 in the so-called insulation displacement technology on the electrical contact element 1, the electrical contact element has two fork springs 4. Each of these fork springs 4 consists of two fork spring legs 5, which define an insertion slot 6 for the electrical cable 3 between them.
- the fork springs 4 each have an elongated, slot-like opening 7, which extends as close as possible to the insertion slot 6, leaving an intermediate web 8. This opening 7 tapers towards the insertion slot 6, while the opening 7 also tapers towards the other end.
- the electrical cable 3 To contact the electrical cable 3, it is inserted from above into the insertion slot 6, as indicated in FIG. 3a in the schematic illustration of a fork spring 4. Since the mutually facing edges of the two fork spring legs 5 are sharpened, the fork spring legs 5 cut into the insulation 9 of the electrical cable 3 until the fork spring legs 5 come into contact with the electrical conductor 10 and thus establish the electrical contact.
- FIG 3a shows, in a purely schematic manner, a fork spring 4 of an electrical contact element with its fork spring legs 5 delimiting the insertion slot 6 and the opening 7.
- the fork spring 4 forms lateral spring leg sections 11 in the area of its opening 7, each of which connects to the fork spring legs 5 at the rear.
- the clamping force F with which the two fork spring legs 5 press against the electrical cable, depends on the design of the fork spring legs 5 and on the design of the insertion slot 6.
- the clamping force F is independent of the additional design of the opening 7, so that the clamping force F is unaffected by this.
- the effective spring length which defines the spring travel f and thus the flexibility of the fork spring legs 5, is predetermined by the lengths l and a shown, the greatest possible spring travel f being indicated by dashed lines in FIG. 3b.
- the length l is the effective spring length if there were no opening 7, that is to say in the case of a conventional electrical contact element.
- the length l is defined by the distance between the center of the intermediate web 8 and the center of the contacted electrical cable 3.
- the length a is defined by the distance between the center of the intermediate web 8 and the end facing away from the insertion slot 6 of the spring leg sections 11 in the region of the base 12 of the opening 7.
- the center point of the intermediate web 8 forms a pivot point D 1 or a joint and the end of the spring leg section 11 facing away from the insertion slot 6 forms a pivot point D a in the region of the base 12 of the opening 7.
- Fig. 3b the bending behavior of the right fork spring leg 5 and the right spring leg portion 11 of the fork spring 4 in Fig. 3a is shown in a purely schematic manner with contacted electrical cable 3.
- the fork spring legs 5 and the spring leg section 11 form a continuous spring which is fixed at one end (in the drawing below) at the pivot point D a and at a distance from the other end (in the drawing above) at the pivot point D l .
- pivots D a and D l form the fixed points when the spring is bent in such a way that the spring leg section 11 is curved to the left in the drawing, while the freely projecting fork spring leg 5 is bent in the opposite direction, so that there is a substantially continuous transition from the spring leg section 11 to the fork spring leg 5 results.
- the spring travel f and thus the flexibility of the fork spring leg is thereby 5 increases without the clamping force F exerted by the fork spring legs 5 being impaired.
- the insulation displacement contacting of the electrical cable 3 is thus improved, since the opening 7 according to the invention increases the flexibility of the fork spring legs 5.
Description
Die Erfindung betrifft ein in einer Kammer eines Kunststoffgehäuses anzuordnendes, aus einem ebenen Blechstanzteil gebogenes elektrisches Kontaktelement in Schneidklemmtechnik einer elektrischen Kabelsteckverbindung, wobei eine flächige Gabelfeder zwischen ihren beiden in der Gabelfederebene elastisch ausbiegbaren Gabelfederschenkeln einen Einführschlitz für die Schneidklemmkontaktierung eines elektrischen Kabels definiert, dessen elektrischer Leiter von einer Isolierung umgeben ist, und wobei die flächige Gabelfeder eine Durchbrechung aufweist.The invention relates to an electrical contact element to be arranged in a chamber of a plastic housing and bent from a flat sheet-metal stamped part in insulation displacement technology of an electrical cable plug connection, a flat fork spring defining an insertion slot for the insulation displacement contacting of an electrical cable between its two fork spring legs which can be elastically bent out in the plane of the fork spring is surrounded by insulation, and wherein the flat fork spring has an opening.
Elektrische Kontaktelemente in der sogenannten Schneidklemmtechnik für elektrische Kabelsteckverbindungen sind bekannt. Sie werden aus einem Blech ausgestanzt und entsprechend der vorgegebenen Form gebogen. Ein derart hergestelltes elektrisches Kontaktelement wird dann in einer entsprechenden Kammer eines Kunststoffgehäuses der Kabelsteckverbindung angeordnet, wonach das entsprechende elektrische Kabel an dem elektrischen Kontaktelement in der Schneidklemmtechnik kontaktiert wird. Zu diesem Zweck weist das elektrische Kontaktelement wenigstens eine Gabelfeder auf, die zwischen sich einen Einführschlitz definiert, wobei die einander zugewandten Kanten der beiden Gabelfederschenkel angeschärft sind. Um das elektrische Kabel zu kontaktieren, wird dieses in den Einführschlitz der Gabelfeder eingeführt, so daß die Schneiden der beiden Gabelfederschenkel die Kabelisolierung derart einritzen, daß sie mit dem elektrischen Leiter in elektrischen Kontakt gelangen. Die beiden Gabelfederschenkel üben dabei eine Klemmkraft auf den elektrischen Leiter aus, so daß dieser in dem Einführschlitz gehalten ist.Electrical contact elements in the so-called insulation displacement technology for electrical cable plug connections are known. They are punched out of a sheet and bent according to the given shape. An electrical contact element produced in this way is then arranged in a corresponding chamber of a plastic housing of the cable plug connection, after which the corresponding electrical cable is contacted on the electrical contact element in insulation displacement technology. For this purpose, the electrical contact element has at least one fork spring, which defines an insertion slot between them, the mutually facing edges of the two fork spring legs being sharpened. To make contact with the electrical cable, insert it into the insertion slot the fork spring inserted so that the cutting of the two fork spring legs carve the cable insulation so that they come into electrical contact with the electrical conductor. The two fork spring legs exert a clamping force on the electrical conductor so that it is held in the insertion slot.
Da bei dem bekannten elektrischen Kontaktelement die Gabelfederschenkel der Gabelfeder durch Ausstanzen eines an seinem einen Ende offenen Schlitzes gebildet werden, ist der Federweg der beiden Schenkel aufgrund der geringen wirksamen Federlänge und damit Hebelarmlänge gering. Da somit die beiden Gabelfederschenkel nur geringfügig aus ihrer Position ausweichen können und somit aufgrund der geringen Flexibilität der Gabelfederschenkel die Breite des Einführschlitzes nur in geringem Maße vergrößerbar ist, wird dadurch das Einführen des zu kontaktierenden elektrischen Kabels erschwert. Dies gilt insbesondere dann, wenn bei ein und demselben Typ eines elektrischen Kontaktelements elektrische Kabel kontaktiert werden sollen, die unterschiedliche Leiterdurchmesser haben. Hinzu kommt, daß die beiden Gabelfederschenkel aufgrund ihrer durch den geringen Federweg bedingten geringen Flexibilität den Kontaktdruck speziell auf ein Litzenbündel bei über längere Zeit nachlassender innerer Stabilität des Litzenbündels sowie aufgrund der Tatsache, daß der Kontaktdruck der Gabelfederschenkel wegen Materialermüdung (Relaxation) mit der Zeit kleiner wird, schlecht aufrechterhalten können. Insgesamt ist somit bei den bekannten elektrischen Kontaktelementen die Schneidklemmkontaktierung der elektrischen Leiter schlecht.Since, in the known electrical contact element, the fork spring legs of the fork spring are formed by punching out a slot that is open at one end, the spring travel of the two legs is small due to the small effective spring length and thus lever arm length. Since the two fork spring legs can thus only slightly move out of their position and the width of the insertion slot can therefore only be increased to a small extent due to the low flexibility of the fork spring legs, the insertion of the electrical cable to be contacted is thereby made more difficult. This applies in particular when electrical cables with different conductor diameters are to be contacted in one and the same type of electrical contact element. In addition, the two fork spring legs, due to their low flexibility due to the low spring travel, reduce the contact pressure, especially on a strand bundle, with the internal stability of the strand bundle decreasing over a long period of time, and due to the fact that the contact pressure of the fork spring legs decreases over time due to material fatigue (relaxation) will be poorly maintained. Overall, the insulation displacement contact of the electrical conductors is poor in the known electrical contact elements.
Ein gattungsgemäßes Kontaktelement ist aus der US-A-40 66 317 bekannt. Es handelt sich um ein Kontaktelement mit relativ lang ausgebildeten Gabelfederschenkeln. Unterhalb der Gabelfeder ist eine Durchbrechung unter Belassung eines Zwischensteges angeordnet, welche dazu dient, das vorbekannte Kontaktelement in diesem Bereich leicht um etwa 90° umbiegen zu können, um es für den Einbau in ein entsprechendes Steckerelement vorzubereiten. Diese Durchbrechung kann jedoch die Schneidklemmkontaktierung des Kontaktelementes nicht verbessern, da der durchbrochene Bereich geknickt wird, so daß die verbleibenden Schenkel keine Beweglichkeit mehr aufweisen, da sie durch die um ca. 90° abgewinkelten Teile fixiert werden.A generic contact element is known from US-A-40 66 317. It is a contact element with relatively long fork spring legs. Below the fork spring there is an opening, leaving an intermediate web, which serves to be able to bend the previously known contact element in this area slightly by about 90 ° in order to prepare it for installation in a corresponding plug element. However, this opening cannot improve the insulation displacement contact of the contact element, since the perforated area is bent, so that the remaining legs no longer have any mobility, since they are fixed by the parts which are angled by approximately 90 °.
Ein weiteres Kontaktelement ist aus der EP-A-02 03 639 bekannt, welches eine im Ruhezustand offene Gabelfeder umfaßt, welche im in ein Gehäuse eingesetzten Zustand zusammengedrückt wird. Unterhalb des Einführungschlitzes ist ein weiterer Einführungsschlitz in Form einer Durchbrechung ausgebildet. Zwischen beiden Einführungsschlitzen verbleibt ein massiver Steg. Da die Schneidklemmkontaktierung durch Zusammenpressen der Gabelfeder bewirkt wird, hat der übrige Kontaktelementbereich keinen Einfluß auf die Kontaktierqualität.Another contact element is known from EP-A-02 03 639, which comprises a fork spring which is open in the idle state and which is compressed in the state inserted into a housing. A further insertion slot in the form of an opening is formed below the insertion slot. A solid web remains between the two insertion slots. Since the insulation displacement contacting is brought about by compressing the fork spring, the rest of the contact element area has no influence on the contacting quality.
Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, das bekannte elektrische Kontaktelement in Schneidklemmtechnik einer elektrischen Kabelsteckverbindung dahingehend weiterzuentwickeln, daß die Schneidklemmkontaktierung der elektrischen Kabel verbessert ist.Proceeding from this, the object of the invention is to further develop the known electrical contact element using insulation displacement technology of an electrical cable plug connection to the effect that the insulation displacement contacting of the electrical cables is improved.
Die technische Lösung besteht in einem Kontaktelement mit den Merkmalen des Patentanspruches 1.The technical solution consists in a contact element with the features of claim 1.
Ein nach dieser technischen Lehre ausgebildetes elektrisches Kontaktelement in Schneidklemmtechnik einer elektrischen Kabelsteckverbindung hat den Vorteil, daß im Hinblick auf die bekannten Gabelfedern bei gleichbleibender Klemmkraft der Federweg und damit die Flexibilität der Gabelfederschenkel vergrößert ist, so daß insgesamt die Schneidklemmkontaktierung des elektrischen Kabels verbessert ist. Dies liegt in der Ausbildung der zusätzlichen Durchbrechung in der Gabelfeder begründet, wobei zwischen dieser Durchbrechung und dem Einführschlitz ein Zwischensteg belassen ist. Da die Klemmkraft direkt von der Ausbildung des Einführschlitzes sowie von der Ausbildung der den Einführschlitz begrenzenden Gabelfederschenkeln abhängt, nicht jedoch durch die Ausbildung einer zusätzlichen Durchbrechung mit der Gabelfeder, wird die Klemmkraft durch die zusätzliche Durchbrechung nicht beeinträchtigt und bleibt daher gleich. Da aber durch die zusätzliche Ausbildung der Durchbrechung in der flächigen Gabelfeder die wirksame Federlänge vergrößert ist, vergrößert sich entsprechend die Flexibilität der beiden Gabelfederarme, so daß insgesamt dadurch größere Auslenkungen und damit größere Federwege möglich sind. Durch die zusätzliche Durchbrechung bilden sich dabei zwei Drehpunkte bzw. Gelenke, nämlich der erste Drehpunkt bzw. das erste Gelenk im Bereich des Zwischensteges zwischen dem Einführschlitz und der Durchbrechung sowie der zweite Drehpunkt bzw. das zweite Gelenk im Bereich des dem Einführschlitz abgewandten Endes der zusätzlichen Durchbrechung.An electrical contact element designed according to this technical teaching in insulation displacement technology of an electrical cable plug connection has the advantage that, with regard to the known fork springs, the spring travel and thus the flexibility of the fork spring legs is increased while maintaining the clamping force, so that the insulation displacement contacting of the electrical cable is improved overall. This is due to the formation of the additional opening in the fork spring, an intermediate web being left between this opening and the insertion slot. Since the clamping force depends directly on the design of the insertion slot and on the design of the fork spring legs delimiting the insertion slot, but not through the formation of an additional opening with the fork spring, the clamping force is not impaired by the additional opening and therefore remains the same. However, since the effective spring length is increased by the additional formation of the opening in the flat fork spring, the flexibility of the two fork spring arms increases accordingly, so that overall larger deflections and thus greater spring travel are possible. The additional opening forms two pivot points or joints, namely the first pivot point or the first joint in the region of the intermediate web between the insertion slot and the opening and the second pivot point or the second joint in the region of the end of the additional opening facing away from the insertion slot.
Vorzugsweise ist die Durchbrechung symmetrisch zur Längsachse des Einführschlitzes ausgebildet. Dies bringt den Vorteil mit sich, daß in beiden Gabelfederschenkeln der Gabelfeder gleiche Verhältnisse herrschen.The opening is preferably symmetrical to the longitudinal axis of the insertion slot. This has the advantage that the same conditions prevail in both fork spring legs of the fork spring.
Weiterhin reicht die Durchbrechung vorzugsweise bis direkt an den Einführschlitz heran. Dies hat den Vorteil, daß der im Bereich des Zwischensteges der Gabelfeder ausgebildete Drehpunkt bzw. das Gelenk eine bestmögliche Flexibilität und damit Ausbiegung der Gabelfederschenkel zulassen.Furthermore, the opening preferably extends directly to the insertion slot. This has the advantage that the pivot point or the joint formed in the area of the intermediate web of the fork spring allows the best possible flexibility and thus deflection of the fork spring legs.
Um eine möglichst große wirksame Federlänge zu erzielen, ist die Durchbrechung im wesentlichen als langgestreckter Schlitz ausgebildet, der in einer weiteren Weiterbildung zum Einführschlitz hin spitz zuläuft. Auf diese Weise weist die Durchbrechung eine im wesentlichen dreieckige Form auf. Dabei kann vorzugsweise der die Durchbrechung bildende Schlitz an dem dem Einführschlitz abgewandten Ende im wesentlichen spitz zulaufen, so daß sich insgesamt ein optimales Biegeverhalten ergibt.In order to achieve the greatest possible effective spring length, the opening is essentially designed as an elongated slot which, in a further development, tapers towards the insertion slot. In this way, the opening has an essentially triangular shape. In this case, the slot forming the opening can preferably taper substantially at the end facing away from the insertion slot, so that overall an optimal bending behavior results.
Schließlich wird in einer Weiterbildung vorgeschlagen, daß die Durchbrechung aus der Gabelfeder herausgestanzt ist, so daß sich auf technisch einfache Weise das erfindungsgemäße elektrische Kontaktelement herstellen läßt.Finally, it is proposed in a further development that the opening is punched out of the fork spring, so that the electrical contact element according to the invention can be produced in a technically simple manner.
Gegenstand der Erfindung ist ferner eine elektrische Kabelsteckverbindung mit wenigstens einem in einer Kammer eines Kunststoffgehäuses angeordneten elektrischen Kontaktelement, welches in der zuvor beschriebenen Weise ausgebildet ist.The invention further relates to an electrical cable plug connection with at least one electrical contact element arranged in a chamber of a plastic housing, which is designed in the manner described above.
Das erfindungsgemäße elektrische Kontaktelement in Schneidklemmtechnik einer elektrischen Kabelsteckverbindung wird nachfolgend anhand der Zeichnung anhand eines Ausführungsbeispieles beschrieben. In den Zeichnungen zeigt:
- Fig. 1
- eine perspektivische Ansicht eines elektrischen Kontaktelements;
- Fig. 2
- einen Längsschnitt durch das elektrische Kontaktelement in Fig. 1;
- Fig. 3a
- eine rein schematische Darstellung einer Gabelfeder des erfindungsgemäßen Kontaktelements mit kontaktiertem elektrischen Kabel zur Verdeutlichung der während der Kontaktierung sich abspielenden physikalischen Vorgänge;
- Fig. 3b
- eine noch schematischere Darstellung der Gabelfeder des erfindungsgemäßen elektrischen Kontaktelements zur Verdeutlichung des Biegeverhaltens bei kontaktiertem elektrischen Kabel.
- Fig. 1
- a perspective view of an electrical contact element;
- Fig. 2
- a longitudinal section through the electrical contact element in Fig. 1;
- Fig. 3a
- a purely schematic representation of a fork spring of the contact element according to the invention with contacted electrical cable to illustrate the physical processes taking place during contacting;
- Fig. 3b
- an even more schematic representation of the fork spring of the electrical contact element according to the invention to illustrate the bending behavior in contacted electrical cable.
In den Fig. 1 und 2 ist eine Ausführungsform eines elektrischen Kontaktelements in Schneidklemmtechnik einer elektrischen Kabelsteckverbindung dargestellt, während anhand der Fig. 3a und 3b die besonderen Eigenschaften des elektrischen Kontaktelements erläutert werden sollen.1 and 2 show an embodiment of an electrical contact element using insulation displacement technology of an electrical cable connector, while the special properties of the electrical contact element are to be explained with reference to FIGS. 3a and 3b.
Das elektrische Kontaktelement 1 in Fig. 1 und 2 besteht aus einem Blechstanzteil, aus dem das elektrische Kontaktelement 1 durch aufeinanderfolgende Biegevorgänge gebogen wird. Aus dem ebenen Blechstanzteil erhält man dann ein elektrisches Kontaktelement 1, wie es in den Fig. 1 und 2 dargestellt ist.The electrical contact element 1 in FIGS. 1 and 2 consists of a stamped sheet metal part, from which the electrical contact element 1 is bent by successive bending processes. From the flat sheet metal stamping is then obtained an electrical contact element 1, as shown in FIGS. 1 and 2.
Dieses elektrische Kontaktelement 1 weist zwei Paare von Federzungen 2 auf, zwischen die beispielsweise der Kontaktstift eines Steckers der elektrischen Steckverbindung zur elektrischen Kontaktierung eingeschoben werden kann. Diese Federzungen 2 sind in herkömmlicher Weise ausgebildet.This electrical contact element 1 has two pairs of
Um am elektrischen Kontaktelement 1 ein elektrisches Kabel 3 in der sogenannten Schneidklemmtechnik kontaktieren zu können, weist das elektrische Kontaktelement zwei Gabelfedern 4 auf. Jede dieser Gabelfedern 4 besteht aus zwei Gabelfederschenkeln 5, die zwischen sich einen Einführschlitz 6 für das elektrische Kabel 3 definieren.In order to be able to contact an
Weiterhin weisen die Gabelfedern 4 jeweils eine längliche, schlitzartige Durchbrechung 7 auf, welche bis dicht an den Einführschlitz 6 unter Belassung eines Zwischensteges 8 heranreicht. Diese Durchbrechung 7 läuft zum Einführschlitz 6 hin spitz zu, während sich die Durchbrechung 7 zum anderen Ende hin ebenfalls verjüngt.Furthermore, the fork springs 4 each have an elongated, slot-
Zum Kontaktieren des elektrischen Kabels 3 wird dieses von oben in den Einführschlitz 6 hineingesteckt, wie dies in Fig. 3a bei der schematischen Darstellung einer Gabelfeder 4 angedeutet ist. Da die einander zugewandten Kanten der beiden Gabelfederschenkel 5 angeschärft sind, schneiden sich die Gabelfederschenkel 5 in die Isolierung 9 des elektrischen Kabels 3 ein, bis die Gabelfederschenkel 5 am elektrischen Leiter 10 zur Anlage kommen und somit den elektrischen Kontakt herstellen.To contact the
Die besonderen Eigenschaften des so ausgebildeten elektrischen Kontaktelementes 1 sollen nachfolgend anhand der Fig. 3a und 3b erläutert werden:The special properties of the electrical contact element 1 designed in this way are to be explained below with reference to FIGS.
In Fig. 3a ist in rein schematischer Weise eine Gabelfeder 4 eines elektrischen Kontaktelements mit ihren den Einführschlitz 6 begrenzenden Gabelfederschenkeln 5 sowie der Durchbrechung 7 dargestellt. Die Gabelfeder 4 bildet dabei im Bereich ihrer Durchbrechung 7 seitliche Federschenkelabschnitte 11, die sich hinten jeweils an die Gabelfederschenkel 5 anschließen.3a shows, in a purely schematic manner, a fork spring 4 of an electrical contact element with its
Die Klemmkraft F, mit der die beiden Gabelfederschenkel 5 gegen das elektrische Kabel drücken, hängt dabei von der Ausbildung der Gabelfederschenkel 5 sowie von der Ausbildung des Einführschlitzes 6 ab. Dabei ist die Klemmkraft F unabhängig von der zusätzlichen Ausbildung der Durchbrechung 7, so daß die Klemmkraft F durch diese unbeeinflußt ist.The clamping force F, with which the two
Allerdings hat die Durchbrechung 7 einen direkten Einfluß auf die Flexibilität der Gabelfederschenkel 5 und damit auf den Federweg f, wie er in Fig. 3b eingezeichnet ist. Die wirksame Federlänge, welche den Federweg f und damit die Flexibilität der Gabelfederschenkel 5 definiert, ist durch die eingezeichneten Längen l und a vorgegeben, wobei in Fig. 3b der größtmögliche Federweg f gestrichelt angedeutet ist. Die Länge l ist dabei die wirksame Federlänge, wenn keine Durchbrechung 7 vorhanden wäre, also bei einem herkömmlichen elektrischen Kontaktelement. Die Länge l ist dabei definiert durch den Abstand zwischen dem Mittelpunkt des Zwischensteges 8 und dem Mittelpunkt des kontaktierten elektrischen Kabels 3. Die Länge a ist definiert durch den Abstand zwischen dem Mittelpunkt des Zwischensteges 8 und dem dem Einführschlitz 6 abgewandten Ende der Federschenkelabschnitte 11 im Bereich der Basis 12 der Durchbrechung 7. Dabei bildet der Mittelpunkt des Zwischensteges 8 einen Drehpunkt Dl bzw. ein Gelenk sowie das dem Einführschlitz 6 abgewandte Ende des Federschenkelabschnittes 11 im Bereich der Basis 12 der Durchbrechung 7 einen Drehpunkt Da.However, the
In Fig. 3b ist in rein schematischer Weise das Biegeverhalten des rechten Gabelfederschenkels 5 sowie des rechten Federschenkelabschnittes 11 der Gabelfeder 4 in Fig. 3a bei kontaktiertem elektrischen Kabel 3 dargestellt. Die Gabelfederschenkel 5 sowie der Federschenkelabschnitt 11 bilden dabei eine durchgehende Feder, welche am einen Ende (in der Zeichnung unten) am Drehpunkt Da sowie mit Abstand vom anderen Ende (in der Zeichnung oben) am Drehpunkt Dl festgelegt ist. Diese Drehpunkte Da und Dl bilden dabei die Fixstellen beim Verbiegen der Feder dahingehend, daß der Federschenkelabschnitt 11 in der Zeichnung nach links gewölbt ist, während der frei auskragende Gabelfederschenkel 5 in die entgegengesetzte Richtung gebogen ist, so daß sich ein im wesentlichen stetiger Übergang von dem Federschenkelabschnitt 11 zum Gabelfederschenkel 5 hin ergibt. Da aber durch die Durchbiegung des Federschenkelabschnittes 11 zwischen den beiden Drehpunkten Dl und Da der Gabelfederschenkel 5 im Bereich seiner Basis im Bereich des Bodens des Einführschlitzes 6 bereits in die gewünschte Richtung gebogen ist, wird dadurch der Federweg f und damit die Flexibilität der Gabelfederschenkel 5 vergrößert, ohne daß damit die durch die Gabelfederschenkel 5 ausgeübte Klemmkraft F beeinträchtigt wird. Insgesamt wird somit die Schneidklemmkontaktierung des elektrischen Kabels 3 verbessert, da mit der erfindungsgemäßen Durchbrechung 7 eine Vergrößerung der Flexibilität der Gabelfederschenkel 5 erreicht wird.In Fig. 3b, the bending behavior of the right
- 11
- elektrisches Kontaktelementelectrical contact element
- 22nd
- FederzungeSpring tongue
- 33rd
- elektrisches Kabelelectrical cable
- 44th
- GabelfederFork spring
- 55
- GabelfederschenkelFork spring legs
- 66
- EinführschlitzInsertion slot
- 77
- DurchbrechungBreakthrough
- 88th
- ZwischenstegMezzanine
- 99
- Isolierunginsulation
- 1010th
- elektrische Leiterelectrical conductor
- 1111
- FederschenkelabschnittSpring leg section
- 1212th
- BasisBase
- AA
- LängsachseLongitudinal axis
- FF
- KlemmkraftClamping force
- ff
- FederwegTravel
- ll
- Längelength
- aa
- Längelength
- Dl D l
- Drehpunktpivot point
- Da D a
- Drehpunktpivot point
Claims (8)
- Electrical contact element (1), of the insulation-displacement type, of an electric cable plug-in connection, which electrical contact element is disposed in a chamber of a plastics housing and is bent out of a flat metal blank, wherein a two-dimensional fork spring (4) defines between its two fork spring legs (5), which can be elastically bent out in the plane of the fork spring, an entry slot (6) for the contacting of an electric cable (3) by insulation-displacement methods, the electrical conductor (10) of which cable is surrounded by an insulation (9), and wherein the two-dimensional fork spring (4) exhibits an aperture (7), characterized in that the aperture is disposed, over its entire length, essentially in the plane of the fork spring and forms there essentially the continuation of the entry slot (6), leaving an intermediate web (8) of the fork spring (4) between the entry slot (6) and the aperture (7), and is laterally framed by spring leg segments (11) which continue the fork spring legs (5) and, as a continuation of the fork spring legs (5), are spring-movable out of the plane of the fork spring between a hinge-like fulcrum Da situated in the region of the base (12) of the aperture (7) and a hinge-like fulcrum D₁ situated in the centre-point of the intermediate web, so that the effective spring length 1 of the fork spring legs (5) from the intermediate web centre-point Dl up to the centre-point of a contacted electric cable is lengthened by the spring length a from the intermediate web centre-point Dl up to the hinged fulcrum Da situated on the base (12).
- Electrical contact element according to Claim 1, characterized in that the aperture (7) is configured symmetrically to the longitudinal axis (A) of the entry slot (6).
- Electrical contact element according to Claim 1 or 2, characterized in that the aperture (7) reaches almost up to the entry slot (6).
- Electrical contact element according to one of Claims 1 to 3, characterized in that the aperture (7) is configured essentially as an elongated slot.
- Electrical contact element according to Claim 4, characterized in that the slot forming the aperture (7) tapers pointedly towards the entry slot (6).
- Electrical contact element according to Claim 3 or 4, characterized in that the slot forming the aperture (7) tapers essentially pointedly at the end facing away from the entry slot (6).
- Electrical contact element according to one of Claims 1 to 6, characterized in that the aperture (7) is stamped out of the fork spring (4).
- Electric cable plug-in connection having at least one electrical contact element (1), disposed in a chamber of a plastics housing, according to one of Claims 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3929928A DE3929928C1 (en) | 1989-09-08 | 1989-09-08 | |
| DE3929928 | 1989-09-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0416306A1 EP0416306A1 (en) | 1991-03-13 |
| EP0416306B1 true EP0416306B1 (en) | 1994-11-02 |
Family
ID=6388942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90115232A Expired - Lifetime EP0416306B1 (en) | 1989-09-08 | 1990-08-08 | Electrical contact member |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5088933A (en) |
| EP (1) | EP0416306B1 (en) |
| DE (2) | DE3929928C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29504996U1 (en) * | 1995-03-24 | 1995-07-13 | Stocko Metallwarenfab Henkels | Electrical contact element |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9203355U1 (en) * | 1992-03-12 | 1993-07-15 | Grote & Hartmann Gmbh & Co Kg, 5600 Wuppertal, De | |
| DE4329813C2 (en) * | 1993-09-03 | 1996-07-04 | Grote & Hartmann | Electrical contact element |
| DE4332194C1 (en) * | 1993-09-22 | 1994-12-01 | Fischer Georg Rohrleitung | Method for producing a plastic moulding, and mouldings |
| DE4335828A1 (en) * | 1993-10-20 | 1995-04-27 | Grote & Hartmann | Electrical flat plug contact socket |
| DE4403278C2 (en) * | 1994-01-31 | 1997-12-04 | Krone Ag | IDC contact element |
| DE9416055U1 (en) * | 1994-10-06 | 1996-02-01 | Stocko Metallwarenfab Henkels | Flat receptacle with cutting contact |
| DE29506206U1 (en) * | 1995-04-10 | 1995-08-24 | Siemens Ag | Contact spring |
| EP1161779B1 (en) * | 1999-03-12 | 2003-02-19 | Grote & Hartmann GmbH & Co. KG | Electrical plug-in connector with at least one insulation displacement contact element consisting of a sheet metal stamping, and corresponding mating connector |
| US6247961B1 (en) | 2000-06-27 | 2001-06-19 | Group Dekko Services, Llc | Distribution wiring harness assembly |
| GB0110767D0 (en) * | 2001-05-02 | 2001-06-27 | Delphi Tech Inc | Female electrical terminal |
| US6638118B2 (en) | 2001-06-19 | 2003-10-28 | Group Dekko Services, Llc | Distribution wiring harness assembly |
| DE102009006828A1 (en) * | 2009-01-30 | 2010-08-05 | Tyco Electronics Amp Gmbh | Insulation displacement contact with decoupling point and contact arrangement with insulation displacement contact |
| CN101982904A (en) * | 2010-08-31 | 2011-03-02 | 上海航天科工电器研究院有限公司 | Power contact component |
| CH712661B1 (en) * | 2016-07-11 | 2018-10-31 | Hager Ind Ag | Modular terminal for clamping strands and hard wires for sockets. |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3234498A (en) * | 1963-06-04 | 1966-02-08 | Western Electric Co | Insulation-penetrating clip-type electrical connectors |
| US4066317A (en) * | 1976-09-30 | 1978-01-03 | Western Electric Company, Inc. | Electrical conductor terminating system |
| US4088382A (en) * | 1976-12-01 | 1978-05-09 | Japan Aviation Electronics Industry, Ltd. | Connecting structure of terminals |
| US4405193A (en) * | 1981-06-08 | 1983-09-20 | Amp Incorporated | Preloaded electrical connector |
| GB2168858B (en) * | 1984-12-21 | 1988-10-05 | Egerton A C Ltd | Electrical contact or terminal |
| JPS61179671U (en) * | 1985-04-30 | 1986-11-10 | ||
| US4889006A (en) * | 1988-03-24 | 1989-12-26 | Briggs & Stratton Corporation | Engine speed control cable clip attachment |
-
1989
- 1989-09-08 DE DE3929928A patent/DE3929928C1/de not_active Expired - Fee Related
-
1990
- 1990-08-08 DE DE59007618T patent/DE59007618D1/en not_active Expired - Fee Related
- 1990-08-08 EP EP90115232A patent/EP0416306B1/en not_active Expired - Lifetime
- 1990-09-07 US US07/578,878 patent/US5088933A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29504996U1 (en) * | 1995-03-24 | 1995-07-13 | Stocko Metallwarenfab Henkels | Electrical contact element |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59007618D1 (en) | 1994-12-08 |
| EP0416306A1 (en) | 1991-03-13 |
| DE3929928C1 (en) | 1990-11-22 |
| US5088933A (en) | 1992-02-18 |
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