EP0001818B1 - Compact double flat spring - Google Patents

Compact double flat spring Download PDF

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Publication number
EP0001818B1
EP0001818B1 EP78101254A EP78101254A EP0001818B1 EP 0001818 B1 EP0001818 B1 EP 0001818B1 EP 78101254 A EP78101254 A EP 78101254A EP 78101254 A EP78101254 A EP 78101254A EP 0001818 B1 EP0001818 B1 EP 0001818B1
Authority
EP
European Patent Office
Prior art keywords
fork
arms
shaped
end region
arm
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
EP78101254A
Other languages
German (de)
French (fr)
Other versions
EP0001818A1 (en
Inventor
Alfred Könnemann
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.)
Grote and Hartmann GmbH and Co KG
Original Assignee
Grote and Hartmann GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2749375A external-priority patent/DE2749375C2/en
Priority claimed from DE2810828A external-priority patent/DE2810828C2/en
Application filed by Grote and Hartmann GmbH and Co KG filed Critical Grote and Hartmann GmbH and Co KG
Publication of EP0001818A1 publication Critical patent/EP0001818A1/en
Application granted granted Critical
Publication of EP0001818B1 publication Critical patent/EP0001818B1/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
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • H01R12/718—Contact members provided on the PCB without an insulating housing
    • 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
    • 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
    • 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
    • H01R4/02—Soldered or welded connections

Definitions

  • the invention relates to a compact double flat spring for arrangement on boards with printed circuits.
  • a fork spring is known, which is arranged in a clamping contact spring strip and is inserted with a solder pin udrch the strip.
  • This fork spring has two fork arms connected to one another by a web, the soldering pin being connected to the web in the opposite direction.
  • a special spreading mechanism is provided to cancel and produce the spring pressure on the plug contacts. This is to prevent damage to the fork arms when plugged in.
  • the fork spring would have to be equipped with an external spring, which requires a large amount of space.
  • the terminal contact spring strip with several fork springs can be plugged onto a printed circuit board on the solder pin side, the solder pins going through the plate and being able to be soldered to the end of the plate.
  • DE-U 7438439 shows and describes the arrangement of an inner spring, the bearing of the inner spring being ensured only by the hooked end regions of the fork arms which are bent inwards. In this respect, there is only a small amount of free space, which is not suitable for mechanical fitting with the inner spring. It is therefore an object of the invention to provide a double flat spring in a compact design, which requires very little space, can be equipped with an inner spring and can be used without expanding means.
  • the compact double flat spring 1 sits in a housing chamber 2 and projects with the solder pins 4 and 5 through holes 7 in the plate 6, the solder pins being soldered to the end of the plate (solder joint 8).
  • the double flat spring 1 consists of the base part 11 which is U-shaped in plan view, from the U-legs 12 and 13 of which one fork arm 9 and 10 on one side and one solder pin 4 and 5 each extend away on the other opposite side.
  • the width of the fork arms corresponds approximately to the length of the U-legs, while the soldering pins extend away from the center of the side of the U-legs and their width corresponds to approximately half the length of the U-legs.
  • the solder pins preferably have a V-shaped embossment 15 for stiffening.
  • the support of the double flat spring is formed on the solder pin side by the free edges 16 of the U-shaped base part 11 next to the solder pin roots.
  • three small projections 17, 18 and 19 are preferably provided on the free edges 16, the projection 17 being located centrally on the U-web 14 and the projections 18 and 19 at the end of the U-legs 12 and 13.
  • Such a support ensures that the double flat spring is held securely on one level, in particular if it is ensured that the soldering pins 4 and 5 are seated in the holes 7 in a clamping manner.
  • there are also free edges 20 on the base part which serve to press the solder pins of the fork spring into the holes 7 and make this process considerably easier.
  • the fork arms 9 and 10 run towards each other at a slight angle and, according to a special embodiment of the invention, form an insertion funnel 21 in the end region and a holder for a bow-shaped inner spring 22 which is adapted to the space between the fork arms.
  • the middle region of each fork arm end has an inwardly directed bead-like deflection 23, so that the fork arm end edge 24 points outwards.
  • the side regions of each fork arm end region are cut in such a way that the incisions 25 on the side edges of the fork arms 9 and 10 start to run towards one another, then extend at right angles and end shortly before the edge 24.
  • incised contact arms 26 which are folded inwards to form an insertion funnel and the contact points and, according to a further preferred embodiment of the invention, are bent back outwards in particular for holding the inner spring 22 in the free end region, so that the two linear contact points 27 and Opposite these form the troughs 28 for engaging the inwardly bent ends 29 of the inner spring arms 30.
  • incised contact arms 26 which are folded inwards to form an insertion funnel and the contact points and, according to a further preferred embodiment of the invention, are bent back outwards in particular for holding the inner spring 22 in the free end region, so that the two linear contact points 27 and Opposite these form the troughs 28 for engaging the inwardly bent ends 29 of the inner spring arms 30.
  • the inner spring 22 can also have a recess 31 in the middle free end region of the spring arms 30. It is furthermore advantageous if the base part 11 has a circumferential stiffening bead 32 which counteracts the expansion of the base part when the fork arms are spread.
  • the contact arms 26 are not formed by cuts, but essentially by free cuts 32 in the fork arm end region. Accordingly, the fork arm end region in the circuit board (FIG. 3) through the cutouts 32 has an hourglass-shaped, narrowed web 33, to which the contact arms 26 are connected in the form of a sensor or arc. The end region of the contact arms 26 also has a step-shaped cutout 34, so that the latching web 35 is formed.
  • the end region of the contact arms is angled in the bending lines 36, 37 and 38, with an approximately rectangular angled inward in the bending line 36 (FIG. 4), an approximately rectangular angled to the outside in the bending line 37 and a hook-shaped back angling in the bending line 38 to the outside.
  • the bends are carried out in one operation and result in an approximately triangular support web 39 as well as sufficiently resilient contact arms 26 with a latching end area for the inner spring 22.
  • the inner spring can also be simplified as a result. There is no need to bend back through the cutouts 40, which are formed by a free cut and result in latching lugs 41 which rest on the latching webs 35 in the assembled state.
  • This double flat spring according to the invention is thus of very compact construction despite the insertion of an inner spring, offers secure storage on a plate and forms an effective insertion funnel for a plug contact part. Good contacting is also guaranteed.
  • contacting is ensured by the elements carrying the inner spring.
  • the elements carrying the inner spring are to be freed from the contacting and their shape is to be designed in such a way that they can be produced in simple steps and there is a relatively large free space between the fork arms for inserting the inner spring.
  • the fork arms 9 and 10 of this double flat spring also run at a slight angle to one another and form an insertion funnel 21 in the end region and a holder for the bow-shaped inner spring 22 which is adapted to the space between the fork arms.
  • the end region of each fork arm has one through cutouts 42 tapered contact arm 44 and following the cutouts two laterally arranged hook-shaped support arms 43 as punched-out shaped tabs for the inner spring 22.
  • Each support arm 43 is connected to the contact arm 44 with the web 45.
  • the web 45 merges into the supporting web 46 with a U-shaped cut 47.
  • the free cut 47 serves to receive and hold the inner spring 22, the nose 48 resulting from the free cut supporting the inner spring. Accordingly, the inner spring 22 has a U-shaped free cut 49 in the spring arm end region, so that the holder is almost form-fitting.
  • the upper edge 50 of the supporting web 46 is arcuate, which advantageously results in a larger cross section in the region of the cutout 47.
  • the manufacture and in particular the shape of the fork arm end area is simple.
  • the contact arms 44 are bent inwards to the horizontal in the bending line 51 and obliquely outwards in the bending line 52, which results in the funnel 21.
  • the contact arms 44 touch in the bending line 52 and form the contact line. It is advantageous if there is a known, outwardly embossed stiffening bead 53 in the central region of the contact line, which at the same time reduces the insertion force for a pointed flat plug and provides guidance for the plug during insertion.
  • Each support arm 43 is only bent downward in the bending line 54. As can be seen in particular from FIG. 1, there is a relatively large free space between the nose 48 and each fork arm 9 or 10, which considerably facilitates the mechanical insertion of the inner spring.
  • the fork arms take over the contacting with their end regions, and laterally arranged support arms 43 hold the inner spring 22.
  • the shape of the end region of the fork arms is, as described, very simple.

Landscapes

  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Description

Die Erfindung betrifft eine Kompaktdoppelflachfeder zur Anordnung auf Platten mit gedruckten Schaltungen.The invention relates to a compact double flat spring for arrangement on boards with printed circuits.

Es ist eine Gabelfeder bekannt, die in einer Klemmkontaktfederleiste angeordnet ist und mit einem Lötstift udrch die Leiste gesteckt ist. Diese Gabelfeder weist zwei über einen Steg miteinander verbundene Gabelarme auf, wobei an dem Steg in entgegengesetzter Richtung verlaufend der Lötstift angebunden ist. Zur Aufhebung und Herstellung des Federdruckes auf die Steckerkontakte ist ein besonderer Spreizmechanismus vorgesehen. Dieser soll eine Beschädigung der Gabelarme beim Stecken verhindern. Zur Erhöhung der Federkräfte müsste die Gabelfeder mit einer Aussenüberfeder ausgerüstet werden, was einen grossen Raumbedarf erfordert. Die Klemmkontaktfederleiste mit mehreren Gabelfedern kann lötstiftseitig auf eine Platte mit gedruckter Schaltung gesteckt werden, wobei die Lötstifte durch die Platte gehen und endseitig auf der Platte verlötet werden können.A fork spring is known, which is arranged in a clamping contact spring strip and is inserted with a solder pin udrch the strip. This fork spring has two fork arms connected to one another by a web, the soldering pin being connected to the web in the opposite direction. A special spreading mechanism is provided to cancel and produce the spring pressure on the plug contacts. This is to prevent damage to the fork arms when plugged in. To increase the spring forces, the fork spring would have to be equipped with an external spring, which requires a large amount of space. The terminal contact spring strip with several fork springs can be plugged onto a printed circuit board on the solder pin side, the solder pins going through the plate and being able to be soldered to the end of the plate.

Die DE-U 7438439 zeigt und beschreibt die Anordnung einer Innenfeder, wobei die Lagerung der Innenfeder lediglich durch die hakenförmig nach innen umgebogenen Endbereiche der Gabelarme gewährleistet wird. Insofern ergibt sich nur ein geringer Freiraum, der für das maschinelle Bestücken mit der Innenfeder nicht geeignet ist. Es ist daher Aufgabe der Erfindung, eine Doppelflachfeder in Kompaktbauweise zu schaffen, die einen sehr geringen Raumbedarf erfordert, mit einer Innenfeder ausgerüstet werden kann und ohne Spreizmittel verwendbar ist.DE-U 7438439 shows and describes the arrangement of an inner spring, the bearing of the inner spring being ensured only by the hooked end regions of the fork arms which are bent inwards. In this respect, there is only a small amount of free space, which is not suitable for mechanical fitting with the inner spring. It is therefore an object of the invention to provide a double flat spring in a compact design, which requires very little space, can be equipped with an inner spring and can be used without expanding means.

Diese Aufgabe wird erfindungsgemäss mit einer in den Ansprüchen 1, 3 und 4 gekennzeichneten Doppelflachfeder gelöst.This object is achieved according to the invention with a double flat spring characterized in claims 1, 3 and 4.

Anhand der Zeichnung wird die erfindungsgemässe Kompaktdoppelflachfeder beispielhaft erläutert. Es zeigen:

  • Fig. 1 eine Seitenansicht,
  • Fig. 2 eine weitere Seitenansicht teilweise im Schnitt in der 90 0-Drehung zur Ansicht nach Fig. 1,
  • Fig. 3 eine Draufsicht auf die Platine eines Gabelarmendbereichs,
  • Fig. 4 eine Seitenansicht einer weiteren Ausführungsform,
  • Fig. 5 eine weitere Seitenansicht der Ausführungsform nach Fig. 4 teilweise im Schnitt,
  • Fig. 6 eine Seitenansicht,
  • Fig. 7 eine weitere Seitenansicht teilweise im Schnitt in der 90 "-Drehung zur Ansicht nach Fig. 6,
  • Fig. 8 eine Draufsicht auf die Platine eines Gabelarmendbereichs.
The compact double flat spring according to the invention is explained by way of example with reference to the drawing. Show it:
  • 1 is a side view,
  • Fig. 2 is a further side view, partially in section in the 0- 90 rotation to the view of FIG. 1,
  • 3 shows a plan view of the circuit board of a fork arm end region,
  • 4 shows a side view of a further embodiment,
  • 5 shows a further side view of the embodiment according to FIG. 4, partly in section,
  • 6 is a side view,
  • 7 shows a further side view, partly in section, in the 90 "rotation to the view according to FIG. 6,
  • Fig. 8 is a plan view of the circuit board of a fork arm end area.

Die erfindungsgemässe Kompaktdoppelflachfeder 1 sitzt in einer Gehäusekammer 2 und ragt mit den Lötstiften 4 und 5 durch Löcher 7 der Platte 6, wobei die Lötstifte endseitig mit der Platte verlötet sind (Lötstelle 8).The compact double flat spring 1 according to the invention sits in a housing chamber 2 and projects with the solder pins 4 and 5 through holes 7 in the plate 6, the solder pins being soldered to the end of the plate (solder joint 8).

Die Doppelflachfeder 1 besteht aus dem in der Draufsicht U-förmigen Basisteil 11, von dessen U-Schenkeln 12 und 13 sich auf einer Seite je ein Gabelarm 9 und 10 und auf der anderen gegenüberliegenden Seite je ein Lötstift 4 und 5 weg erstrecken. Die Breite der Gabelarme entspricht etwa der Länge der U-Schenkel, während die Lötstifte sich von der Mitte der Seite der U-Schenkel weg erstrecken und ihre Breite etwa der halben Länge der U-Schenkel entspricht. Die Lötstifte weisen zur Versteifung vorzugsweise eine V-förmige Durchprägung 15 auf.The double flat spring 1 consists of the base part 11 which is U-shaped in plan view, from the U-legs 12 and 13 of which one fork arm 9 and 10 on one side and one solder pin 4 and 5 each extend away on the other opposite side. The width of the fork arms corresponds approximately to the length of the U-legs, while the soldering pins extend away from the center of the side of the U-legs and their width corresponds to approximately half the length of the U-legs. The solder pins preferably have a V-shaped embossment 15 for stiffening.

Das Auflager der Doppelflachfeder wird lötstiftseitig durch die freien Kanten 16 des U-förmigen Basisteils 11 neben den Lötstiftwurzeln gebildet. Vorzugsweise sind zur Erzielung eines statisch bestimmten Auflagers drei kleine Vorsprünge 17, 18 und 19 an den freien Kanten 16 vorgesehen, wobei der Vorsprung 17 mittig am U-Steg 14 und die Vorsprünge 18 und 19 am Ende der U-Schenkel 12 und 13 sitzen. Ein derartiges Auflager sorgt für einen sicheren Halt der Doppelflachfeder auf einer Ebene, insbesondere wenn man gewährleistet, dass die Lötstifte 4 und 5 in den Löchern 7 klemmend sitzen. Neben den Gabelarmen 9 und 10 befinden sich am Basisteil ebenfalls freie Kanten 20, die zum Eindrücken der Lötstifte der Gabelfeder in die Löcher 7 dienen und diesen Vorgang erheblich erleichtern.The support of the double flat spring is formed on the solder pin side by the free edges 16 of the U-shaped base part 11 next to the solder pin roots. To achieve a statically determined support, three small projections 17, 18 and 19 are preferably provided on the free edges 16, the projection 17 being located centrally on the U-web 14 and the projections 18 and 19 at the end of the U-legs 12 and 13. Such a support ensures that the double flat spring is held securely on one level, in particular if it is ensured that the soldering pins 4 and 5 are seated in the holes 7 in a clamping manner. In addition to the fork arms 9 and 10 there are also free edges 20 on the base part, which serve to press the solder pins of the fork spring into the holes 7 and make this process considerably easier.

Die Gabelarme 9 und 10 laufen ein wenig gewinkelt aufeinander zu und bilden nach einer besonderen Ausführungsform der Erfindung im Endbereich einen Einführtrichter 21 sowie eine Halterung für eine bügelförmige, dem Raum zwischen den Gabelarmen angepasste Innenfeder 22. Zu diesem Zweck weist gemäss Fig. 1 u. 2 der mittlere Bereich jedes Gabelarmendes eine nach innen gerichtete sickenartige Durchbiegung 23 auf, so dass die Gabelarmendkante 24 nach aussen weist. Ausserdem sind die Seitenbereiche jedes Gabelarmendbereichs eingeschnitten dergestalt, dass die Einschnitte 25 an den Seitenkanten der Gabelarme 9 und 10 beginnen, aufeinander zu laufen, dann rechtwinkling nach oben verlaufen und kurz vor der Kante 24 enden. Dadurch ergeben sich eingeschnittene Kontaktarme 26, die zur Bildung eines Einführtrichters und den Kontaktstellen nach innen geklappt sind und nach einer weiteren bevorzugten Ausführungsform der Erfindung insbesondere zur Halterung der Innenfeder 22 im freien Endbereich nach aussen rückgebogen sind, so dass sich die beiden linienförmigen Kontaktstellen 27 und diesen gegenüberliegend die Mulden 28 zum Eingreifen der nach innen gebogenen Enden 29 der Innenfederarme 30 bilden. Auf diese Weise ist es gelungen, mit wenigen Veränderungen im Endbereich der Gabelarme einen effektiven Einführtrichter und zwei Kontaktstellen zu schaffen, die gleichzeitig die Halterung einer Innenfeder gewährleisten.The fork arms 9 and 10 run towards each other at a slight angle and, according to a special embodiment of the invention, form an insertion funnel 21 in the end region and a holder for a bow-shaped inner spring 22 which is adapted to the space between the fork arms. 2, the middle region of each fork arm end has an inwardly directed bead-like deflection 23, so that the fork arm end edge 24 points outwards. In addition, the side regions of each fork arm end region are cut in such a way that the incisions 25 on the side edges of the fork arms 9 and 10 start to run towards one another, then extend at right angles and end shortly before the edge 24. This results in incised contact arms 26 which are folded inwards to form an insertion funnel and the contact points and, according to a further preferred embodiment of the invention, are bent back outwards in particular for holding the inner spring 22 in the free end region, so that the two linear contact points 27 and Opposite these form the troughs 28 for engaging the inwardly bent ends 29 of the inner spring arms 30. In this way it was possible to create an effective insertion funnel and two contact points with only a few changes in the end area of the fork arms, which at the same time ensure that an inner spring is held.

Die Innenfeder 22 kann ausserdem im mittleren freien Endbereich der Federarme 30 eine Ausnehmung 31 besitzen. Es ist weiterhin von Vorteil, wenn das Basisteil 11 eine umlaufende Versteifungssicke 32 aufweist, die der Aufweitung des Basisteils beim Spreizen der Gabelarme entgegenwirkt.The inner spring 22 can also have a recess 31 in the middle free end region of the spring arms 30. It is furthermore advantageous if the base part 11 has a circumferential stiffening bead 32 which counteracts the expansion of the base part when the fork arms are spread.

Nach einer besonderen Ausführungsform der Erfindung gemäss Fig. 3 bis 5 werden die Kontaktarme 26 nicht durch Einschnitte, sondern im wesentlichen durch Freischnitte 32 im Gabelarmendbereich gebildet. Demgemäss weist der Gabelarmendbereich in der Platine (Fig. 3) durch die Freischnitte 32 einen stundenglasförmigen, verengten Steg 33 auf, an den sich fühlerförmig bzw. bogenförmig die Kontaktarme 26 anschliessen. Der Endbereich der Kontaktarme 26 besitzt ebenfalls einen stufenförmigen Freischnitt 34, so dass der Raststeg 35 gebildet wird.According to a special embodiment of the invention according to FIGS. 3 to 5, the contact arms 26 are not formed by cuts, but essentially by free cuts 32 in the fork arm end region. Accordingly, the fork arm end region in the circuit board (FIG. 3) through the cutouts 32 has an hourglass-shaped, narrowed web 33, to which the contact arms 26 are connected in the form of a sensor or arc. The end region of the contact arms 26 also has a step-shaped cutout 34, so that the latching web 35 is formed.

Der Endbereich der Kontaktarme ist in den Biegelinien 36, 37 und 38 abgewinkelt, wobei in der Biegelinie 36 eine etwa rechtwinklige Abwinklung nach innen (Fig. 4), in der Biegelinie 37 eine etwa rechtwinklige Abwinklung zur Aussenseite und in der Biegelinie 38 eine hakenförmige Rückwinklung nach aussen erfolgt. Die Abwinklungen werden in einem Arbeitsgang durchgeführt und ergeben einen etwa dreieckförmigen Stützsteg 39 sowie ausreichend federnde Kontaktarme 26 mit einem Rastendbereich für die Innenfeder 22. Die Innenfeder kann infolgedessen ebenfalls vereinfacht werden. Es entfallen Rückbiegungen durch die Aussparungen 40, die durch einen Freischnitt gebildet werden und Rastnasen 41 ergeben, die im montierten Zustand auf den Raststegen 35 ruhen.The end region of the contact arms is angled in the bending lines 36, 37 and 38, with an approximately rectangular angled inward in the bending line 36 (FIG. 4), an approximately rectangular angled to the outside in the bending line 37 and a hook-shaped back angling in the bending line 38 to the outside. The bends are carried out in one operation and result in an approximately triangular support web 39 as well as sufficiently resilient contact arms 26 with a latching end area for the inner spring 22. The inner spring can also be simplified as a result. There is no need to bend back through the cutouts 40, which are formed by a free cut and result in latching lugs 41 which rest on the latching webs 35 in the assembled state.

Diese erfindungsgemässe Doppelflachfeder ist somit trotz Einfügung einer Innenfeder sehr kompakt aufgebaut, bietet eine sichere Lagerung auf einer Platte und bildet einen effektiven Einführtrichter für ein Steckerkontaktteil. Darüber hinaus wird eine gute Kontaktierung gewährleistet.This double flat spring according to the invention is thus of very compact construction despite the insertion of an inner spring, offers secure storage on a plate and forms an effective insertion funnel for a plug contact part. Good contacting is also guaranteed.

Nach der Ausführungsform der Erfindung gemäss Fig. 1 bis 5 wird die Kontaktierung durch die die Innenfeder tragenden Elemente gewährleistet. Bei der Ausführungsform der Erfindung gemäss Fig. 6 bis 8 sollen die die Innenfeder tragenden Elemente von der Kontaktierung befreit und ihre Form so gestaltet werden, dass sie mit einfachen Arbeitsschritten herstellbar sind und sich ein relativ grosser Freiraum zwischen den Gabelarmen zum Einführen der Innenfeder ergibt.According to the embodiment of the invention according to FIGS. 1 to 5, contacting is ensured by the elements carrying the inner spring. In the embodiment of the invention according to FIGS. 6 to 8, the elements carrying the inner spring are to be freed from the contacting and their shape is to be designed in such a way that they can be produced in simple steps and there is a relatively large free space between the fork arms for inserting the inner spring.

Zur Lösung dieser Aufgabe laufen die Gabelarme 9 und 10 dieser Doppelflachfeder ebenfalls ein wenig gewinkelt aufeinander zu und bilden im Endbereich einen Einführtrichter 21 sowie eine Halterung für die bügelförmige, dem Raum zwischen den Gabelarmen angepasste Innenfeder 22. Zu diesem Zweck weist der Endbereich jedes Gabelarms einen durch Freischnitte 42 verjüngten Kontaktarm 44 und im Anschluss an die Freischnitte zwei seitlich angeordnete hakenförmige Tragarme 43 als ausgestanzte Formlappen für die Innenfeder 22 auf.To solve this problem, the fork arms 9 and 10 of this double flat spring also run at a slight angle to one another and form an insertion funnel 21 in the end region and a holder for the bow-shaped inner spring 22 which is adapted to the space between the fork arms. For this purpose, the end region of each fork arm has one through cutouts 42 tapered contact arm 44 and following the cutouts two laterally arranged hook-shaped support arms 43 as punched-out shaped tabs for the inner spring 22.

Jeder Tragarm 43 ist mit dem Steg 45 an den Kontaktarm 44 angebunden. Der Steg 45 geht in den Tragsteg 46 mit einem U-förmigen Freischnitt 47 über. Der Freischnitt 47 dient zur Aufnahme und Halterung der Innenfeder 22, wobei die sich durch den Freischnitt ergebende Nase 48 die Innenfeder lagert. Die Innenfeder 22 besitzt dementsprechend im Federarmendbereich einen ebenfalls U-förmigen Freischnitt 49, so dass die Halterung nahezu formschlüssig erfolgt. Die Oberkante 50 des Tragstegs 46 ist bogenförmig ausgebildet, woraus in vorteilhafter Weise ein grösserer Querschnitt im Bereich des Freischnitts 47 resultiert.Each support arm 43 is connected to the contact arm 44 with the web 45. The web 45 merges into the supporting web 46 with a U-shaped cut 47. The free cut 47 serves to receive and hold the inner spring 22, the nose 48 resulting from the free cut supporting the inner spring. Accordingly, the inner spring 22 has a U-shaped free cut 49 in the spring arm end region, so that the holder is almost form-fitting. The upper edge 50 of the supporting web 46 is arcuate, which advantageously results in a larger cross section in the region of the cutout 47.

Die Herstellung und insbesondere Formgebung des Gabelarmendbereichs ist einfach. Die Kontaktarme 44 werden in der Biegelinie 51 nach innen zur Waagerechten und in der Biegelinie 52 schräg nach aussen abgebogen, wodurch sich der Trichter 21 ergibt. Dabei berühren sich die Kontaktarme 44 in der Biegelinie 52 und bilden die Kontaktlinie. Vorteilhaft ist, wenn sich im mittleren Bereich der Kontaktlinie eine an sich bekannte nach aussen geprägte Versteifungssicke 53 befindet, die gleichzeitig die Einsteckkraft für einen angespitzten Flachstecker mindert und dem Stekker eine Führung beim Einstecken bietet.The manufacture and in particular the shape of the fork arm end area is simple. The contact arms 44 are bent inwards to the horizontal in the bending line 51 and obliquely outwards in the bending line 52, which results in the funnel 21. The contact arms 44 touch in the bending line 52 and form the contact line. It is advantageous if there is a known, outwardly embossed stiffening bead 53 in the central region of the contact line, which at the same time reduces the insertion force for a pointed flat plug and provides guidance for the plug during insertion.

Jeder Tragarm 43 ist lediglich in der Biegelinie 54 nach unten abgebogen. Wie insbesondere aus Fig. 1 ersichtlich, ergibt sich zwischen der Nase 48 und jedem Gabelarm 9 oder 10 ein relativ grosser Freiraum, der das maschinelle Einführen der Innenfeder erheblich erleichtert.Each support arm 43 is only bent downward in the bending line 54. As can be seen in particular from FIG. 1, there is a relatively large free space between the nose 48 and each fork arm 9 or 10, which considerably facilitates the mechanical insertion of the inner spring.

Bei der neuen Ausführungsform der Kompaktdoppelflachfeder übernehmen die Gabelarme mit ihren Endbereichen die Kontaktierung und seitlich angeordnete Tragarme 43 die Halterung der Innenfeder 22. Die Formgebung des Endbereichs der Gabelarme ist, wie beschrieben, sehr einfach.In the new embodiment of the compact double flat spring, the fork arms take over the contacting with their end regions, and laterally arranged support arms 43 hold the inner spring 22. The shape of the end region of the fork arms is, as described, very simple.

Claims (7)

1. Compact double leaf spring which displays a U-shaped base part, from the side limbs of which extend a connecting element transversely thereto rearwardly and fork arme forwardly, wherein a stirrup-shaped internal spring is arranged in the space between the fork arms and retained in the end region of the fork arms, characterized thereby, that the fork arms (9 and 10) in the end region form an inlet funnel (21) and the central width region of each fork arm end displays an inwardly directed, corrugation-like bend (23), the lateral regions of each fork arm end region are notched, wherein the notches (25) commence at the lateral edges of the fork arms (9 and 10), run towards one another, then run upwards at right angles and terminate shortly before the end edge (24) of the fork arms, and contact arms (26) result from the notches, are folded inwardly and in the free end region bent back outwards.
2. Compact double leaf spring according to claim 1, characterized thereby, that the fork arms (9 and 10) run angled towards each other.
3. Compact double leaf spring which displays a U-shaped base part, from the side limbs of which extend a connecting element transversely thereto rearwardly and fork arms forwardly, wherein a stirrup-shaped internal spring is arranged in the space between the fork ends and retained in the end regio of the fork arms, characterized thereby, that the fork arms (9, 10) in the end regio form an inlet funnel and contact arms (26) are formed by open cuts (32) in the fork arm end regions, wherein the open cuts (32) in each fork arm form an hourglass-shaped web (33), which the contact arms (36) adjoin in the form of feelers, the end region of the contact arms (26) possesses a step- shaped open cut (34) and displays a detent web (35), and that the end region of the contact arms (26) is angled in a first (36), in a second (37) and in a third bend line (38), wherein an approximately right-angled bend inwards has taken place in the first bend line (36), an approximately right-angled bend outwards in the second bend line (37) and a hook-shaped backward bend outwards in the third bend line, from which triangular support web (39) results, and that the internal spring (22) displays recesses (40) and detent lugs (41).
4. Compact double leaf spring which displays a U-shaped base part, from the side limbs of which extend a connecting element transversely thereto rearwardly and fork arms forwardly, wherein a stirrup-shaped internal spring is arranged in the space between the fork arms and retained in the end region of the fork arms, characterized thereby, that the fork arms (9, 10) in the end region form an inlet funnel (21) and that the end region of each fork arm (9, 10) displays a contact arms (44) narrowed by open cuts (42) and, adjoining the open cuts, two laterally arranged, hook-shaped support arms (43) as stamped-out shaped lugs for the internal spring (22), wherein each contact arm (44) is bent inwardly to the horizontal in a first bend line (51) and obliquely outwards in the second bend line (52) and the contact arms (44) touch each other in the second bend line (52) and wherein each support arm is bent downwardly only in a third bend line (54).
5. Compact double leaf spring according to claim 4, characterized thereby, that each support arm (43) is connected by the web (45) to the contact arm (44), the web (45) passes over by a U-shaped open cut (47) into the support web (46), the open cut (47) serves for reception and retention of the internal spring (22), wherein a lug (48) resulting form the open cut supports the internal spring which correspondingly displays a likewise U-shaped open cut (49) in the spring arm and region.
6. Compact double leaf spring according to claim 4, characterized thereby, that the upper edge (50) of the support web (46) is constructed to be arcuately shaped.
7. Compact double leaf spring according to one or more of the claims 4to 6, characterized thereby, that an outwardly embossed stiffening bead (53) is arranged in the central region of the second bend line (52).
EP78101254A 1977-11-04 1978-10-28 Compact double flat spring Expired EP0001818B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2749375A DE2749375C2 (en) 1977-11-04 1977-11-04 Compact double flat spring
DE2749375 1977-11-04
DE2810828A DE2810828C2 (en) 1978-03-13 1978-03-13 Compact double flat spring
DE2810828 1978-03-13

Publications (2)

Publication Number Publication Date
EP0001818A1 EP0001818A1 (en) 1979-05-16
EP0001818B1 true EP0001818B1 (en) 1981-11-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101254A Expired EP0001818B1 (en) 1977-11-04 1978-10-28 Compact double flat spring

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EP (1) EP0001818B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527243A1 (en) * 1991-08-02 1993-02-17 Grote & Hartmann GmbH & Co. KG Solder terminal with contract pin
JP6466230B2 (en) * 2015-04-06 2019-02-06 日本航空電子工業株式会社 connector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7438439U (en) * 1975-03-13 Grote & Hartmann Double flat spring contact
DE1490493C3 (en) * 1963-12-02 1975-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Spring element for plug connections
BE758876A (en) * 1969-11-17 1971-05-12 Amp Inc Socket for an electrical conductor of an integrated circuit module
SE391417B (en) * 1975-06-30 1977-02-14 Asea Ab CONTACT CLICK
DE7708237U1 (en) * 1977-03-17 1977-07-14 Neu, Leopold, 7980 Ravensburg Receiving contact

Also Published As

Publication number Publication date
EP0001818A1 (en) 1979-05-16

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