EP0040783B1 - Contact spring for flat cable connection - Google Patents

Contact spring for flat cable connection Download PDF

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Publication number
EP0040783B1
EP0040783B1 EP81103803A EP81103803A EP0040783B1 EP 0040783 B1 EP0040783 B1 EP 0040783B1 EP 81103803 A EP81103803 A EP 81103803A EP 81103803 A EP81103803 A EP 81103803A EP 0040783 B1 EP0040783 B1 EP 0040783B1
Authority
EP
European Patent Office
Prior art keywords
contact spring
contact
arm
rigid plate
arms
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
Application number
EP81103803A
Other languages
German (de)
French (fr)
Other versions
EP0040783A1 (en
Inventor
Josef Ing.Grad. Heft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81103803T priority Critical patent/ATE9048T1/en
Publication of EP0040783A1 publication Critical patent/EP0040783A1/en
Application granted granted Critical
Publication of EP0040783B1 publication Critical patent/EP0040783B1/en
Expired legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/422—Securing in resilient one-piece base or case, e.g. by friction; One-piece base or case formed with resilient locking means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—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
    • H01R4/242—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 being plates having a single slot

Definitions

  • the invention relates to a contact spring according to the preamble of claim 1.
  • Such a contact spring is known from DE-B-26 07 693.
  • Object of the present invention is therefore to develop a contact spring of the type mentioned in such a way that it can still be operated reliably in the cavity of a contact spring strip with a simple construction, even if the contact grid between the individual contact springs of the strip 'only allows relatively small distances.
  • this object is achieved by an embodiment of such a contact spring corresponding to the characterizing features of claim 1.
  • This design of the contact spring ensures, despite the relatively shorter design of the U-legs, a safe transmission of the forces which occur when contacting a ribbon cable cell parent to the contact spring strip, because in particular the part of the rigid plate lying outside the projection of the resilient contact spring leg is uncomplicated and corresponds to this part of the area Dimensioned pocket of the contact spring strip can be inserted and thereby a stable positive connection between the contact spring and the strip housing is made possible, while at the free end of the other part of the rigid plate interacting with the resilient contact spring leg, a section suitable for contacting with a contact pin or contact knife can be created .
  • the portion of the rigid plate that can be inserted into the pocket of the strip housing is held in the pocket, since the wart-like projections press into the plastic mass of the strip housing, but the impressions caused by the projections when inserted are in the area that is only covered by these projections at least partially back again, so that the projections lock themselves automatically in the strip housing,
  • the transverse offset of the contact slot relative to the contacting gap of the contact spring makes it possible to realize a rectangular contact grid on the side of the contact spring leg contacts, because if one z. B, the degree of dislocation is equal to a quarter of the grid spacing of this contact grid, and the contact springs are arranged in two rows with contact spring legs interchanged in one row with the contact springs of the other row, the contact spring strip of course having to be designed in such a way that it accommodates the partial area of the Rigid plate provided housing-side pockets are each in the right place, the contact slots of corresponding contact springs of the peiden rows are shifted by one quarter of the pitch on one side and one quarter of the pitch on the other side of the other contact spring, so that in the case of a ribbon cable with individual conductors lying next to one another at half the grid spacing of the contact spring contacts formed by the contact spring legs of the contact springs, only a single conductor is detected by a contact slot of a contact spring.
  • the contact spring made of flat material has a U-shaped base part 2, the U-legs 30, 31 of which are perpendicular to the direction of insertion of a contact knife or contact pin which is to be connected to the contact spring, are directed.
  • the two U-legs 30, 31 of the base part 2 are of unequal length and the longer U-leg 30 goes in the insertion direction of a contact knife or contact pin into a rigid one Plate 3a formed contact spring leg, the width of which corresponds to the length of the U-leg 30.
  • a free cut 35 is provided between the base part 2 and the plate 3a, which separates the curved region of the U-leg 30 from the plate 3a.
  • the U-leg 30 has two contact cutting edges 16, which delimit a contact slot 17 between them, into which a wire-shaped conductor with a course directed transversely to the slot 17 can be pressed.
  • the contact cutting edges 16 spring against the conductor and connect it to the contact spring.
  • the crosspiece 41 of the base part 2 is wider on the side of the pair of contact cutting edges 16, that is to say on the side facing away from the contact springs, than the shorter U-leg 31. With this widened crosspiece 41, the contact spring can be inserted in the direction of insertion Contact spring cavity closing cover are supported, which is connected to the contact spring bar after inserting the contact springs.
  • the other shorter U-leg 31 of the base part 2 is in one piece with a spring-elastic contact spring leg 3b, the width of which is less than half the width of the plate 3a.
  • the contact spring leg 3b is arranged approximately centrally to the plate 3a.
  • the contact spring arm 3b At its free end 32, the contact spring arm 3b has a shoulder 34 which widens the contact spring arm 3b on one side and runs opposite to the U-leg 31, but does not extend to the edge of the rigid plate 3a.
  • the incision 37 also makes it possible to let the partial area 38 of the contact spring handle 3a run completely flat, so that it can be inserted into a suitably adapted housing pocket (FIG. 3) 42 of the contact spring strip 43.
  • the wart-like projections 40 provided in the partial area 38 press into the plastic mass of the strip 43 and thus fix the contact spring inserted into the strip housing, so that it cannot fall out of the housing again.
  • the pocket 42 is closed at the top, i.e. in FIG.
  • the contact spring leg 3b does not protrude as far as the rigid plate 3a, the resilient leg 3b always remains movable, in other words, digging the free end 32 of the resilient leg 3b into the plastic mass of the contact spring strip is thereby reliably prevented .
  • a pocket wall 44 (FIG. 3) provided to form the pocket 42 between the rigid plate 3a and the resilient leg 3b advantageously also serves for pre-centering and pre-opening the contact spring leg 3b, which is supported on this wall 44. In this way, the force required for inserting a contact knife or contact pin is reduced and the risk of rear insertion, that is to say the missing space between rigid plate 3a and contact spring leg 3b, is substantially reduced by a contact knife or a contact pin.
  • the U-shaped base part together with the contact spring leg 3a designed as a rigid plate, forms a rigid part of the contact spring which is surrounded by walls of the strip housing and which fully guarantees the reliable position of the contact spring in the cavity of the strip housing 43 facing it.
  • the contact slot 17 for receiving a single conductor with respect to the spring portion 3b formed by the portion 39 and the contact spring contact 4 is transversely offset.
  • This transverse offset, the z. B. is a quarter of the grid spacing of the contact pins or contact knives from each other, which are to be connected to the contact springs of the strip, makes it possible for a single conductor of a ribbon cable to be detected by only one contact slot 17, that is to say only by one contact spring, if, in the case of a two-row arrangement of the contact springs in the strip housing, the contact springs of one row with contact spring legs exchanged with respect to the contact springs of the other row are not 3a, 3b arranges, the cavities for receiving the contact springs must of course be designed in a corresponding manner.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Insulated Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Contacts (AREA)
  • Cable Accessories (AREA)

Abstract

1. A contact spring for a flat cable connection comprising a U-shaped base part (2) and two contact spring arms (3a, 3b) which project at right angles from the arms of the U (30, 31) of the base part and together form a contact spring contact (4) for a contact pin or contact blade, and which can be inserted into a channel-like cavity of a contact spring strip with the base part being arranged transversely to the course of the cavity with the contact spring arms leading ; and having a pair of contact blades (16) which project from one of the two arms of the U of the base part in opposition to the course of the contact spring arms and which protrude from the contact spring strip and form a cutting clamping contact for a wire-form conductor, characterised in that the arms of the U (30, 31) of the base part (2) are so dimensioned as to have different lengths ; that the contact spring arm which protrudes from the longer arm (30) of the U is formed as a rigid plate (3a) having a width which corresponds to the length of the arm (30) of the U ; and that the springy contact spring arm (3b) which projects from the shorter arm (31) of the U has a width which is less than half the width of the rigid plate (3a) ; that, furthermore, the springy contact spring arm (3b) is arranged approximately centrally with respect to the rigid plate (3a), and at its free end (32) is provided with an attachment (34) which is directed away from the free end (33) of the arm of the U (30, 31), but set back in relation to the edge of the rigid plate (3a), and which widens the contact spring arm (3b) at one side ; and that at its free end (36), the rigid plate (3a) has an incision (37) separating a flat part-region (38), which essentially lies outside the projection of the springy contact spring arm (3b) on to the rigid plate (3a), and another part-region (39) which cooperates with the springy contact spring arm (3b) and is bent in towards the latter at its end.

Description

Die Erfindung bezieht sich auf eine Kontaktfeder entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to a contact spring according to the preamble of claim 1.

Eine derartige Kontaktfeder Ist aus der DE-B-26 07 693 bekannt.Such a contact spring is known from DE-B-26 07 693.

Um bei dieser Kontaktfeder einen sicheren Sitz der Kontaktfeder in dem Hohlraum einer Kontaktfederleiste zu gewährleisten, ist es erforderlich, die U-Schenkal des Basisteiles relativ lang zu bemessen. Daher ist diese Kontaktfeder für eine Anschiußtechnjk, bei der die Abstände der Einzelleiter eines Bandkabels voneinander relativ gering bemessen sind, weniger geeignet.In order to ensure a secure fit of the contact spring in the cavity of a contact spring strip with this contact spring, it is necessary to dimension the U-leg of the base part relatively long. This contact spring is therefore less suitable for a connection technique in which the distances between the individual conductors of a ribbon cable are relatively small.

Aufgabe vorliegender Erfindung Ist es daher, eine Kontaktfeder der eingangs genannten Art so weiterzubilden, daß sie bei fertigungstechnisch einfachem Aufbau dennoch betriebssicher In dem Hohlraum einer Kontaktfederleiste angeordnet werden kann, auch wenn das Kontaktraster zwischen den einzelnen Kontaktfedern der Leiste 'nur relativ kleipe Abstände zuläßt.Object of the present invention is therefore to develop a contact spring of the type mentioned in such a way that it can still be operated reliably in the cavity of a contact spring strip with a simple construction, even if the contact grid between the individual contact springs of the strip 'only allows relatively small distances.

Erfindungsgemäß ergibt sich die Lösung dieser Aufgabe durch eine den kennzeichnenden Merkmalen des Anspruches 1 entsprechende Aus-Pildung einer solchen Kontaktfeder.According to the invention, this object is achieved by an embodiment of such a contact spring corresponding to the characterizing features of claim 1.

Durch diese Ausbildung der Kontaktfeder wird trotz relativ kürzerer Ausbildung der U-Schenkel eine sichere Übertragung der bei der Kontaktierung eines Bandkabelelnzellelters auftretenden Kräfte auf die Kontaktfederleiste gewährleistet, weil insbesondere der außerhalb der Projektion des federnden Kontaktfederschenkels liegende Teilbereich der starren Platte unkompliziert In eine diesem Teilbereich entsprechend bemessene Tasche der Kontaktfederleiste eingeschoben werden kann und dadurch ein stabiler Formschluß zwischen der Kontaktfeder und dem Leistengehäuse ermöglicht wird, während am freien Ende des mit dem federnden Kontaktfederschenkel zusammenwirkenden anderen Teilbereichs der starren Platte ein für die Kontaktgabe mit einem Kontaktstift oder Kontaktmesser geeigneter Abschnitt geschaffen werden kann.This design of the contact spring ensures, despite the relatively shorter design of the U-legs, a safe transmission of the forces which occur when contacting a ribbon cable cell parent to the contact spring strip, because in particular the part of the rigid plate lying outside the projection of the resilient contact spring leg is uncomplicated and corresponds to this part of the area Dimensioned pocket of the contact spring strip can be inserted and thereby a stable positive connection between the contact spring and the strip housing is made possible, while at the free end of the other part of the rigid plate interacting with the resilient contact spring leg, a section suitable for contacting with a contact pin or contact knife can be created .

Zwar ist es aus der DE-A-28 19868, insbesondere aus deren Fig. 2, sowie 9 bis 12, schon bekannt, bei einer Kontaktfeder einen von einem U-Schenkel der Kontaktfeder abstehenden Kontaktfederschenkel als starre Platte mit einer der Länge des U-Schenkels entsprechenden Breite auszubilden und einen von dem anderen U-Schenkel abstehenden federnden Kontaktfederschenkel mit einer Breite zu versehen, die etwa die Hälfte der Breite der starren Platte hat, und bei der der federnde Kontaktfederschenkel etwa mittig zur starren Platte angeordnet ist.Although it is already known from DE-A-28 19868, in particular from FIG. 2, and 9 to 12, in the case of a contact spring, a contact spring leg protruding from a U-leg of the contact spring as a rigid plate with a length of the U- Form leg corresponding width and provide a resilient contact spring leg protruding from the other U-leg with a width which is approximately half the width of the rigid plate, and in which the resilient contact spring leg is arranged approximately centrally to the rigid plate.

Jedoch sind bei dieser bekannten Kontaktfeder keine Maßnahmen vorgesehen, die die starre Platte einerseits besonders zum Einschieben In ein Kontaktfedergehäuse, andererseits besonders zum Zusammenwirken mit dem federnden Kontaktfederschenkel geeignet machen.However, no measures are provided in this known contact spring that make the rigid plate particularly suitable for insertion into a contact spring housing on the one hand, and particularly suitable for cooperation with the resilient contact spring leg on the other hand.

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Merkmalen der Unteransprüche 2 und 3,Further refinements of the invention result from the features of subclaims 2 and 3,

Auf diese Weise wird der In der Tasche des Leistengehäuses einschiebbare Teilbereich der starren Platte in der Tasche festgehalten, da sich die warzenähnlichen Vorsprünge in die Kunststoffmasse des Leistengehäuses eindrücken, die beim Einschieben von den Vorsprüngen verursachten Eindrückungen sich jedoch in den von diesen Vorsprüngen lediglich überstrichenen Bereich wieder zumindest teilweise zurückbilcen, so daß sich die Vorsprünge selbsttätig im Leistengehäuse verriegeln,In this way, the portion of the rigid plate that can be inserted into the pocket of the strip housing is held in the pocket, since the wart-like projections press into the plastic mass of the strip housing, but the impressions caused by the projections when inserted are in the area that is only covered by these projections at least partially back again, so that the projections lock themselves automatically in the strip housing,

Der Querversatz des Kontaktschlitzes gegenüber dem Kontaktierungsspalt der Kontaktfeder ermöglicht es, auf der Seite der Kontaktfederschenkelkontakte ein Rechteck-Kontaktraster zu realisieren, da, wenn man z. B, den Versetzungsgrad gleich einem Viertel des Rasterabstandes dieses Kontaktrasters bemißt, und die Kontaktfedern In zwei Reihen mit in einer Reihe zu den Kontaktfedern der anderen Reihe gegeneinander vertauschten Kontaktfederschenkeln anordnet, wobei selbstverständlich die Kontaktfederleiste so ausgebildet sein muß, daß die zur Aufnahme des Teilbereiches der starren Platte vorgesehenen gehäuseseitigen Taschen sich jeweils am richtigen Ort befinden, die Kontaktschlitze jeweils korrespondierender Kontaktfedern der peiden Reihen bei der einen Kontaktfeder um ein Viertel des Rastermaßes nach der einen Seite und bei der anderen Kontaktfeder um ein Viertel des Rastermaßes nach der anderen Seite verschoben sind, so daß bei einem Bandkabel mit im halben Rasterabstand der von den Kontaktfederschenkeln der Kontaktfedern gebildeten Kontaktfederkontakte nebeneinander liegenden Einzelleitern, jeweils nur ein Einzelleiter von einem Kontaktschlitz einer Kontaktfeder erfaßt wird.The transverse offset of the contact slot relative to the contacting gap of the contact spring makes it possible to realize a rectangular contact grid on the side of the contact spring leg contacts, because if one z. B, the degree of dislocation is equal to a quarter of the grid spacing of this contact grid, and the contact springs are arranged in two rows with contact spring legs interchanged in one row with the contact springs of the other row, the contact spring strip of course having to be designed in such a way that it accommodates the partial area of the Rigid plate provided housing-side pockets are each in the right place, the contact slots of corresponding contact springs of the peiden rows are shifted by one quarter of the pitch on one side and one quarter of the pitch on the other side of the other contact spring, so that in the case of a ribbon cable with individual conductors lying next to one another at half the grid spacing of the contact spring contacts formed by the contact spring legs of the contact springs, only a single conductor is detected by a contact slot of a contact spring.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von drei Figuren noch näher erläutert. Dabei zeigen, jeweils stark vergrößert, die

  • Figuren 1 und 2 die Kontaktfeder in Seitenansicht einmal mit Blickrichtung quer zu den U-Schenkeln des Basisteiles und einmal mit Blickrichtung parallel zu diesen und
  • Figur 3 eine Ansicht von oben auf eine in eine aus Kunststoff bestehende Kontaktfederleiste eingesetzte Kontaktfeder mit geschnitten dargestelltem Leistengehäuse.
An embodiment of the invention is explained in more detail below with reference to three figures. Here, each greatly enlarged, the
  • Figures 1 and 2, the contact spring in side view, once with a direction of view transverse to the U-legs of the base part and once with a direction of view parallel to these and
  • Figure 3 is a view from above of a contact spring inserted into a plastic contact spring strip with a strip housing shown in section.

Im einzelnen ist den Figuren zu entnehmen, daß die aus Flachmaterial bestehende Kontaktfeder ein U-förmiges Basisteil 2 aufweist, dessen U-Schenkel 30, 31 rechtwinklig zur Einsteckrichtung eines Kontaktmessers oder Kontaktstiftes, welcher bzw. weiches mit der Kontaktfeder in Verbindung gebracht werden soll, gerichtet sind.In particular, it can be seen from the figures that the contact spring made of flat material has a U-shaped base part 2, the U-legs 30, 31 of which are perpendicular to the direction of insertion of a contact knife or contact pin which is to be connected to the contact spring, are directed.

Die beiden U-Schenkel 30, 31 des Basisteiles 2 sind ungleich lang bemessen und der längere U-Schenkel 30 geht in Einsteckrichtung eines Kontaktmessers oder Kontaktstiftes in einen als starre Platte 3a ausgebildeten Kontaktfederschenkel über, dessen Breite der Länge des U-Schenkels 30 entspricht. Um dabei ohne Rücksicht auf den beim Übergang in das Querstück 41 des Basisteiles 2 gekrümmt verlaufenden U-Schenkel 30 die starre Platte 3a vollkommen plan ausbilden zu können und die Platte sich über die ganze Breite, die durch die Länge des U-Schenkels 30 bestimmt ist, erstrecken zu lassen, ist zwischen dem Basisteil 2 und der Platte 3a ein Freischnitt 35 vdrgesehen, der den gekrümmt verlaufenden Bereich des U-Schenkels 30 von der Platte 3a trennt.The two U-legs 30, 31 of the base part 2 are of unequal length and the longer U-leg 30 goes in the insertion direction of a contact knife or contact pin into a rigid one Plate 3a formed contact spring leg, the width of which corresponds to the length of the U-leg 30. In order to be able to design the rigid plate 3 a completely flat, regardless of the U-leg 30 that runs curved during the transition into the cross-piece 41 of the base part 2, and the plate extends over the entire width, which is determined by the length of the U-leg 30 , a free cut 35 is provided between the base part 2 and the plate 3a, which separates the curved region of the U-leg 30 from the plate 3a.

Entgegengesetzt zur Platte 3a weist der U-Schehkel 30 zwei Kontaktschneiden 16 auf, die zwischen sich einen Kontaktschlitz 17 begrenzen, in den ein drahtförmiger Leiter mit quer zum Schlitz 17 gerichtetem Verlauf eingedrückt werden kann. Dabei legen sich die Kontaktschneiden 16 federn an der Leiter und verbinden diesen mit der Kontaktfeder. Das Querstück 41 des basisteiles 2 ist auf der Seite des Kontaktschneidenpaares 16, also auf der von den Kon- taktf6derschenke!n abgewandten Seite, breiter ausgebildet als der kürzere U-Schenkel 31. Mit diesem verbreiterten Querstück 41 kann die Kontaktfeder in Einsteckrichtung an einem die Kontaktfederleistenhohlräume verschließenden Deckel abgestützt werden, der nach dem Einsetzen der Kontaktfedern mit der Kontaktfederleiste verbunden wird.Contrary to the plate 3a, the U-leg 30 has two contact cutting edges 16, which delimit a contact slot 17 between them, into which a wire-shaped conductor with a course directed transversely to the slot 17 can be pressed. The contact cutting edges 16 spring against the conductor and connect it to the contact spring. The crosspiece 41 of the base part 2 is wider on the side of the pair of contact cutting edges 16, that is to say on the side facing away from the contact springs, than the shorter U-leg 31. With this widened crosspiece 41, the contact spring can be inserted in the direction of insertion Contact spring cavity closing cover are supported, which is connected to the contact spring bar after inserting the contact springs.

Der andere kürzere U-Schenkel 31 des Basisteiles 2 ist einstückig mit einem federelastisch ausgebildeten Kontaktfederschenkel 3b, dessen Breite geringer als die Hälfte der Breite der Platte 3a bemessen ist. Außerdem ist der Kontaktfederschenkel 3b etwa mittig zu der Platte 3a angeordnet.The other shorter U-leg 31 of the base part 2 is in one piece with a spring-elastic contact spring leg 3b, the width of which is less than half the width of the plate 3a. In addition, the contact spring leg 3b is arranged approximately centrally to the plate 3a.

An seinem freien Ende 32 weist der Kontaktfedersthenkel 3b einen den Kontaktfederschenkel 3b einseitig verbreiternden Ansatz 34 auf, der entgegengesetzt zum U-Schenkel 31 verläuft, jedoch nicht bis zum Rand der starren Platte 3a reicht.At its free end 32, the contact spring arm 3b has a shoulder 34 which widens the contact spring arm 3b on one side and runs opposite to the U-leg 31, but does not extend to the edge of the rigid plate 3a.

Auf diese Weise ergibt sich auf der von Ansatz 34 abgewandten Seite des Kontaktfederschenkels 3b ein über diesen Kontaktfederschenkel seitlich hinausragender Teilbereich 38 der Platte 3a. Dieser außerhalb der Projektion des Kontaktfederschenkels 3b auf die Platte 3a lie- gende Teilbereich der Platte 3a ist am freien Ende 36 der Platte 3a durch einen Einschnitt 37 von einem gegenüber dem Ansatz 34 des Kontaktfederschenkels 3b liegenden Teilbereich 39 der Platte 3a getrennt. Auf diese Weise kann das freie Ende 36 des Teilbereiches 39 in Richtung zum freien Ende 32 des Kontaktfederschenkels 3b gebogen werden und daher zusammen mit diesem ebenfalls bogenförmig gekrümmten freien Ende 32 den Kontaktfederkontakt 4 bilden, in den zum Zwecke der Herstellung einer elektrischen Verbindung zwischen einem Kontaktmesser oder Kontaktstift und der Kontaktfeder das Kontaktmesser oder der Kontaktstift eingesteckt wird.In this way, on the side of the contact spring leg 3b facing away from shoulder 34, a partial region 38 of the plate 3a protrudes laterally beyond this contact spring leg. This on the plate 3a Lie g border outside the projection of the contact spring leg 3b portion of the plate 3a is of the plate 3a of the plate 3 separated at the free end 36 through an incision 37 of a side opposite to the projection 34 of the contact spring leg 3b subregion. 39 In this way, the free end 36 of the portion 39 can be bent towards the free end 32 of the contact spring leg 3b and therefore together with this also curved free end 32 form the contact spring contact 4 in the for the purpose of establishing an electrical connection between a contact knife or contact pin and the contact spring the contact knife or the contact pin is inserted.

Der Einschnitt 37 ermöglicht es außerdem, den Teilbereich 38 des Kontaktfedersohenkels 3a vollkommen flach verlaufen zu lasseh, so daß dieser in eine entsprechend angepaßt ausgebildete Gehäusetasche (Fig. 3) 42 der Kontaktfederleiste 43 eingeschoben werden kann. Im Teilbereich 38 vorgesehene warzenartige Vorsprünge 40 drücken sich dabei in die Kunststoffmasse der Leiste 43 ein und fixieren damit die in das Leistengehäuse eingesetzte Kontaktfeder, so daß diese nicht wieder aus dem GehäUse herausfallen kann. Die Tasche 42 ist nach oben zu, also in Fig. 3 in Richtung zum Betrachter hin, verschlossen, so daß dadurch beim Einsetzen der Kontaktfeder in einen ihr zugeordneten Hohlraum der Kontaktfederleiste mit den Kontaktfederschenkein 3a urid 3b voraus, ein Anschlag gebildet wird, der die Einstecktiefe der Kontaktfeder entgegen der Eihsteckrichtung eines Kontaktmessers oder Kohtaktstiftes in die Kontaktfeder begrenzt und dadurch auch die Kontaktfeder beim Eindrücken eines Einzelleiters In den Kontaktschlitz 17 abstützt. Da außerdem der federnde Kontaktfederschenkel 3b nicht so weit nach oben ragt, wie die starre Platte 3a, bleibt der federnde Schenkel 3b immer beweglich, mit anderen Worten, ein Eingraben des freien Endes 32 des federnden Schenkels 3b in die Kunststoffmasse der Kontaktfederleiste wird dadurch sicher verhindert.The incision 37 also makes it possible to let the partial area 38 of the contact spring handle 3a run completely flat, so that it can be inserted into a suitably adapted housing pocket (FIG. 3) 42 of the contact spring strip 43. The wart-like projections 40 provided in the partial area 38 press into the plastic mass of the strip 43 and thus fix the contact spring inserted into the strip housing, so that it cannot fall out of the housing again. The pocket 42 is closed at the top, i.e. in FIG. 3 towards the viewer, so that when the contact spring is inserted into an associated cavity of the contact spring strip with the contact spring legs 3a and 3b in advance, a stop is formed which forms the The insertion depth of the contact spring is limited in the opposite direction to the plug-in direction of a contact knife or carbon pin and thereby also supports the contact spring when a single conductor is pressed into the contact slot 17. In addition, since the resilient contact spring leg 3b does not protrude as far as the rigid plate 3a, the resilient leg 3b always remains movable, in other words, digging the free end 32 of the resilient leg 3b into the plastic mass of the contact spring strip is thereby reliably prevented .

Eine zur Bildung der Tasche 42 zwischen der Starren Platte 3a und dem federnden Schenkel 3b vorgesehene Taschenwand 44 (Fig. 3) dient vorteilhaft zugleich zur Vorzentrierung und Voröffnung des Kontaktfederschenkels 3b, der sich an dieser Wand 44 abstützt. Auf diese Weise wird die zum Einstecken eines Kontaktmessers oder Kontaktstiftes erforderliche Kraft vermindert und die Gefahr eines Hintersteckens, also des Verfehlens des Zwischenraumes zwischen starrer Platte 3a und Kontaktfederschenkel 3b, durch ein Kontaktmesser oder einen Kontaktstift wesentlich vermindert.A pocket wall 44 (FIG. 3) provided to form the pocket 42 between the rigid plate 3a and the resilient leg 3b advantageously also serves for pre-centering and pre-opening the contact spring leg 3b, which is supported on this wall 44. In this way, the force required for inserting a contact knife or contact pin is reduced and the risk of rear insertion, that is to say the missing space between rigid plate 3a and contact spring leg 3b, is substantially reduced by a contact knife or a contact pin.

Wie insbesondere Fig. 3 zeigt, hildet das U-förmige Basisteil zusammen mit dem als starre Platte ausgebildeten Kontaktfederschenkel 3a einen von Wänden des Leistengehäuses umfaßten starren Teil der Kontaktfeder, der die betriebssichere Lage der Kontaktfeder in dem ihr zugewandten Hohlraum des Leistengehäuses 43 voll gewährleistet.As shown in FIG. 3 in particular, the U-shaped base part, together with the contact spring leg 3a designed as a rigid plate, forms a rigid part of the contact spring which is surrounded by walls of the strip housing and which fully guarantees the reliable position of the contact spring in the cavity of the strip housing 43 facing it.

Aus Fig. 1 ist zu entnehmen, daß der Kontaktschlitz 17 zur Aufnahme eines Einzelleiters gegenüber dem vom Teilbereich 39 und dem Kontakt federschenkel 3b gebildeten Kontaktfederkontakt 4 querversetzt ist. Dieser Querversatz, der z. B. ein Viertel des Rasterabstandes der Kontaktstifte oder Kontaktmesser voneinander beträgt, die mit den Kontaktfedern der Leiste in Verbindung zu bringen sind, ermöglicht es, daß jeweils ein Einzelleiter eines Bandkabels jeweils nur von einem Kontaktschlitz 17, also auch nur von einer Kontaktfeder erfaßt wird, wenn man bei zweireihiger Anordnung der Kontaktfedern im Leistengehäuse die Kontaktfedern der einen Reihe mit gegenüber den Kontaktfedern der anderen Reihe vertauschten Kontaktfederschenkein 3a, 3b anordnet, wobei selbstverständlich die Hohlräume zur Aufnahme der Kontaktfedern in entsprechender Weise ausgelegt sein müssen.From Fig. 1 it can be seen that the contact slot 17 for receiving a single conductor with respect to the spring portion 3b formed by the portion 39 and the contact spring contact 4 is transversely offset. This transverse offset, the z. B. is a quarter of the grid spacing of the contact pins or contact knives from each other, which are to be connected to the contact springs of the strip, makes it possible for a single conductor of a ribbon cable to be detected by only one contact slot 17, that is to say only by one contact spring, if, in the case of a two-row arrangement of the contact springs in the strip housing, the contact springs of one row with contact spring legs exchanged with respect to the contact springs of the other row are not 3a, 3b arranges, the cavities for receiving the contact springs must of course be designed in a corresponding manner.

Claims (3)

1. A contact spring for a flat cable connection comprising a U-shaped base part (2) and two contact spring arms (3a, 3b) which project at right angles from the arms of the U (30, 31) of the base part and together form a contact spring contact (4) for a contact pin or contact blade, and which can be inserted into a channel-like cavity of a contact spring strip with the base part being arranged transversely to the course of the cavity with the contact spring arms leading ; and having a pair of contact blades (16) which project from one of the two arms of the U of the base part in opposition to the course of the contact spring arms and which protrude from the contact spring strip and form a cutting clamping contact for a wire-form conductor, characterised in that the arms of the U (30, 31) of the base part (2) are so dimensioned as to have different lengths ; that the contact spring arm which protrudes from the longer arm (30) of the U is formed as a rigid plate (3a) having a width which corresponds to the length of the arm (30) of the U ; and that the springy contact spring arm (3b which projects from the shorter arm (31) of the U has a width which is less than half the width of the rigid plate (3a) ; that, furthermore, the springy contact spring arm (3b) is arranged approximately centrally with respect to the rigid plate (3a), and at its free end (32) is provided with an attachment (34) which is directed away from the free end (33) of the arm of the U (30, 31 but set back in relation to the edge of the rigid plate (3a), and which widens the contact spring arm (3b) at one side ; and that at its free end (36), the rigid plate (3a) has an incision (37) separating a flat part-region (38), which essentially lies outside the projection of the springy contact spring arm (3b) on to the rigid plate (3a), and another part-region (39) which cooperates with the springy contact spring arm (3b) and is bent in towards the latter at its end.
2. A contact spring according to Claim 1, characterised in that the flat part-region (38) of the rigid plate is provided with wart-like projections (40).
3. A contact spring according to Claim 1, characterised in that the contact slot (17) which is bounded by the contact blades (16) and forms the cutting clamping contact is transversely displaced with respect to the contact spring contact (4) formed by the contact spring arms (3a, 3b).
EP81103803A 1980-05-23 1981-05-18 Contact spring for flat cable connection Expired EP0040783B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103803T ATE9048T1 (en) 1980-05-23 1981-05-18 CONTACT SPRING FOR RIBBON CABLE CONNECTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3019841 1980-05-23
DE19803019841 DE3019841A1 (en) 1980-05-23 1980-05-23 CONTACT SPRING FOR TAPE CABLE CONNECTION

Publications (2)

Publication Number Publication Date
EP0040783A1 EP0040783A1 (en) 1981-12-02
EP0040783B1 true EP0040783B1 (en) 1984-08-15

Family

ID=6103197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103803A Expired EP0040783B1 (en) 1980-05-23 1981-05-18 Contact spring for flat cable connection

Country Status (5)

Country Link
EP (1) EP0040783B1 (en)
AT (1) ATE9048T1 (en)
DE (2) DE3019841A1 (en)
FI (1) FI811585L (en)
NO (1) NO811719L (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213655A (en) * 1987-12-15 1989-08-16 Bicc Plc Electrical connector
DE29506206U1 (en) * 1995-04-10 1995-08-24 Siemens Ag Contact spring
JP2910623B2 (en) * 1995-06-06 1999-06-23 住友電装株式会社 Joint connector, terminal fitting and connector housing
US5904581A (en) * 1996-07-17 1999-05-18 Minnesota Mining And Manufacturing Company Electrical interconnection system and device
FR2809872B1 (en) * 2000-05-30 2002-08-09 Sylea ELECTRICAL CONNECTION DEVICE FOR MALE ELECTRIC CONTACT MEMBER AND HOUSING ELEMENT FOR RECEIVING SUCH A DEVICE
DE10247410B4 (en) * 2002-10-11 2014-02-13 Robert Bosch Gmbh contact element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540550A1 (en) * 1975-09-11 1977-04-07 Du Pont Nederland Connector for flat cable - has cable clamped between guide block and cover and knife contacts biting into it
DE2607693C3 (en) * 1976-02-25 1979-11-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Contact spring for ribbon cable connection
CA1082325A (en) * 1977-05-06 1980-07-22 Charles H. Weidler Electrical connectors with terminals having wire- receiving portions for inserting wires
US4171858A (en) * 1978-06-01 1979-10-23 Litton Systems, Inc. Insulation displacement connector for a flat multi-conductor cable

Also Published As

Publication number Publication date
NO811719L (en) 1981-11-24
DE3165533D1 (en) 1984-09-20
ATE9048T1 (en) 1984-09-15
DE3019841A1 (en) 1981-12-03
EP0040783A1 (en) 1981-12-02
FI811585L (en) 1981-11-24

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