EP0872921B1 - Contact arrangement for a printed circuit board - Google Patents

Contact arrangement for a printed circuit board Download PDF

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Publication number
EP0872921B1
EP0872921B1 EP19980106265 EP98106265A EP0872921B1 EP 0872921 B1 EP0872921 B1 EP 0872921B1 EP 19980106265 EP19980106265 EP 19980106265 EP 98106265 A EP98106265 A EP 98106265A EP 0872921 B1 EP0872921 B1 EP 0872921B1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit board
leg
printed circuit
spring
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
Application number
EP19980106265
Other languages
German (de)
French (fr)
Other versions
EP0872921A3 (en
EP0872921A2 (en
Inventor
Hartmut Dipl.-Ing. Schumacher
Josef Dipl.-Ing. Scherl
Bernhard Hiltl
Reinhard Dipl.-Ing. Herdegen
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
Original Assignee
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
Publication of EP0872921A2 publication Critical patent/EP0872921A2/en
Publication of EP0872921A3 publication Critical patent/EP0872921A3/en
Application granted granted Critical
Publication of EP0872921B1 publication Critical patent/EP0872921B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H01H2001/5811—Connections to printed circuits both fixed and movable contacts being formed by blank stamping and mounted or soldered on printed circuit board without any other housing elements

Definitions

  • the invention relates to a contact device for a printed circuit board, with a resilient in the direction of actuation contact and a mating contact.
  • a generic contact device belongs to the prior art. It is a common embodiment as it comes with different manufacturers. However, these known commercially available Einlötiata and miniature switch contacts for printed circuit boards either have a slight overstroke compensation or they are relatively large in larger overstroke dimensions. The contacts used here are complicated and relatively expensive.
  • an electrical contact device which comprises a housing, a contact body arranged therein with two contact arms and a plunger.
  • the plunger is provided here to act on a support arm, wherein a direct influence of the plunger on a second contact arm, which is provided for contacting a contact pin, is avoided.
  • the contact is made by means of the restoring force of the spring-biased contact arm.
  • the invention has for its object to provide a contact device of the type mentioned above, which allows a large overstroke compensation and requires a relatively small installation space.
  • the object is achieved by a contact device in which the contact is designed as a flexurally elastic contact spring having a first resilient leg with a contact surface and a second leg, which is resilient in the direction of actuation to the first leg.
  • the contact device formed in this way is also advantageous because it does not require a separate return spring and a certain self-cleaning effect of the contact surfaces takes place, since they experience a small sliding movement when pressed.
  • the contact spring has a soldering area provided for soldering to the printed circuit board, on which a tab for switching off the soldering point on the printed circuit board has worn out. This represents a cost-effective design, in which no housing is required for fixing and yet a sufficiently stable attachment takes place.
  • a reliable contacting of the contact surface with the mating contact is achieved when the contact spring is slotted in the region of the contact surface, resulting in a Doppeltitlegabe.
  • the contact spring 1 shows a contact spring 1 of a contact device according to the invention for printed circuit boards.
  • the contact spring 1 is flexurally elastic with a first resilient leg 2, with a contact surface 3 and with a second leg 4 executed, which is resilient in the direction of actuation to the first leg 2 towards. In the area of the contact surface 3, the contact spring 1 is slotted.
  • the contact spring 1 has a soldering area on which a tab 5 is sheared to relieve the soldering on the circuit board.
  • the contact spring 1 is made in one piece, wherein the connection between the first 2 and the second leg 4 has a relatively large bending radius, which allows the spring deflection of the second leg 4 to the first leg 2 out. In this way, even a large overstroke can be compensated.
  • FIG. 2 shows a contact device according to the invention which is installed in a printed circuit board 6 in a standing installation position.
  • the contact spring 1 described above is installed standing in the circuit board 6.
  • the tab 5 of the contact spring 1 is supported on the printed circuit board 6 and thus ensures a stable mounting of the contact spring 1 to the circuit board 6.
  • the counter contact associated with the contact device is realized here in the form of second solder pins 7, which are soldered in the circuit board 6 and in the proximity of the slotted contact surface 3 range.
  • the contact spring 1 is brought by bending the first spring-elastic leg 2 for contacting its contact surface 3 with the solder pins 7.
  • After contacting the second leg 4 is pushed through the compound with the large bending radius for the first spring-elastic leg 2 at overstroke.
  • the distance between the two legs 2 and 4 can be largely utilized to compensate for an overstroke.
  • FIG 3 a contact spring 1 is shown for a horizontal installation position, wherein the leg 2 is bent almost at right angles at the end.
  • FIG 4 shows an embodiment according to the invention of a contacted in a circuit board 6 contact device in a horizontal position.
  • This contact device differs from the previously described according to FIG 2 in particular by the design of the mating contact, which is realized here by two contact pads 9.

Description

Die Erfindung bezieht sich auf eine Kontakteinrichtung für eine Leiterplatte, mit einem in Betätigungsrichtung federnden Kontakt und einem Gegenkontakt.The invention relates to a contact device for a printed circuit board, with a resilient in the direction of actuation contact and a mating contact.

Eine gattungsgemäße Kontakteinrichtung gehört zum Stand der Technik. Es ist eine gängige Ausführungsform wie sie zum Lieferumfang verschiedener Hersteller gehört. Diese bekannten handelsüblichen Einlötelemente und Miniaturschaltkontakte für Leiterplatten haben allerdings entweder einen geringen Überhubausgleich oder sie sind bei größerem Überhub in ihren Abmessungen verhältnismäßig groß. Die hierbei verwendeten Kontakte sind kompliziert aufgebaut und verhältnismäßig teuer.A generic contact device belongs to the prior art. It is a common embodiment as it comes with different manufacturers. However, these known commercially available Einlötelemente and miniature switch contacts for printed circuit boards either have a slight overstroke compensation or they are relatively large in larger overstroke dimensions. The contacts used here are complicated and relatively expensive.

Aus CH 671648 A5 ist eine elektrische Kontakteinrichtung bekannt, die ein Gehäuse, einen darin angeordneten Kontaktkörper mit zwei Kontaktarmen und einen Stößel umfasst. Der Stößel ist hierbei zur Wirkung auf einen Haltearm vorgesehen, wobei ein direkter Einfluss des Stößels auf einen zweiten Kontaktarm, der zur Kontaktierung eines Kontaktstiftes vorgesehen ist, vermieden wird. Die Kontaktierung wird mittels der Rückstellkraft des federelastisch vorgespannten Kontaktarms hergestellt.From CH 671648 A5 an electrical contact device is known which comprises a housing, a contact body arranged therein with two contact arms and a plunger. The plunger is provided here to act on a support arm, wherein a direct influence of the plunger on a second contact arm, which is provided for contacting a contact pin, is avoided. The contact is made by means of the restoring force of the spring-biased contact arm.

Der Erfindung liegt die Aufgabe zugrunde, eine Kontakteinrichtung der oben genannten Art zu schaffen, die einen großen Überhubausgleich ermöglicht und einen verhältnismäßig kleinen Einbauraum benötigt.The invention has for its object to provide a contact device of the type mentioned above, which allows a large overstroke compensation and requires a relatively small installation space.

Die Aufgabe wird gelöst durch eine Kontakteinrichtung, bei der der Kontakt als biegeelastische Kontaktfeder ausgeführt ist, die einen ersten federelastischen Schenkel mit einer Kontaktfläche und einen zweiten Schenkel aufweist, der in Betätigungsrichtung zum ersten Schenkel hin federelastisch nachgiebig ist. Die derart ausgebildete Kontakteinrichtung ist außerdem vorteilhaft, weil sie keine separate Rückdruckfeder erfordert und ein gewisser Selbstreinigungseffekt der Kontaktflächen stattfindet, da diese beim Betätigen eine kleine Schiebebewegung erfahren.The object is achieved by a contact device in which the contact is designed as a flexurally elastic contact spring having a first resilient leg with a contact surface and a second leg, which is resilient in the direction of actuation to the first leg. The contact device formed in this way is also advantageous because it does not require a separate return spring and a certain self-cleaning effect of the contact surfaces takes place, since they experience a small sliding movement when pressed.

Weiterhin ist es vorteilhaft, wenn die Kontaktfeder einen zur Verlötung mit der Leiterplatte vorgesehenen Lötbereich aufweist, an dem ein Lappen zur Entlastung der Lötstelle auf der Leiterplatte ausgeschert ist. Dies stellt eine kostengünstige Ausführung dar, bei der zur Fixierung kein Gehäuse benötigt wird und dennoch eine ausreichend stabile Befestigung erfolgt.Furthermore, it is advantageous if the contact spring has a soldering area provided for soldering to the printed circuit board, on which a tab for switching off the soldering point on the printed circuit board has worn out. This represents a cost-effective design, in which no housing is required for fixing and yet a sufficiently stable attachment takes place.

Eine zuverlässige Kontaktierung der Kontaktfläche mit dem Gegenkontakt wird erreicht, wenn die Kontaktfeder im Bereich der Kontaktfläche geschlitzt ist, was zu einer Doppelkontaktgabe führt.A reliable contacting of the contact surface with the mating contact is achieved when the contact spring is slotted in the region of the contact surface, resulting in a Doppelkontaktgabe.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.Further advantageous embodiments of the invention can be found in the dependent claims.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen:

FIG 1
eine perspektivische Ansicht einer erfindungsgemäßen Kontaktfeder für eine stehende Einbaulage,
FIG 2
eine in einer Leiterplatte montierte Kontakteinrichtung in stehender Einbaulage,
FIG 3
eine perspektivische Ansicht einer Kontaktfeder für liegenden Einbaulage und
FIG 4
eine in einer Leiterplatte montierte Kontakteinrichtung in liegender Einbaulage.
An embodiment of the invention will be explained in more detail below with reference to a drawing. Show it:
FIG. 1
a perspective view of a contact spring according to the invention for a vertical mounting position,
FIG. 2
a contact device mounted in a printed circuit board in an upright position,
FIG. 3
a perspective view of a contact spring for horizontal mounting position and
FIG. 4
a mounted in a circuit board contact device in a horizontal position.

In FIG 1 ist eine Kontaktfeder 1 einer erfindungsgemäßen Kontakteinrichtung für Leiterplatten dargestellt. Die Kontaktfeder 1 ist biegeelastisch mit einem ersten federelastischen Schenkel 2, mit einer Kontaktfläche 3 und mit einem zweiten Schenkel 4 ausgeführt, der in Betätigungsrichtung zum ersten Schenkel 2 hin federelastisch nachgiebig ist. Im Bereich der Kontaktfläche 3 ist die Kontaktfeder 1 geschlitzt. Zur Verlötung mit einer Leiterplatte weist die Kontaktfeder 1 einen Lötbereich auf, an dem ein Lappen 5 zur Entlastung der Lötstelle auf der Leiterplatte ausgeschert ist. Die Kontaktfeder 1 ist einstückig ausgeführt, wobei die Verbindung zwischen dem ersten 2 und dem zweiten Schenkel 4 einen verhältnismäßig großen Biegeradius besitzt, der die Durchfederung des zweiten Schenkels 4 zum ersten Schenkel 2 hin ermöglicht. Auf diese Weise kann auch ein großer Überhub ausgeglichen werden.1 shows a contact spring 1 of a contact device according to the invention for printed circuit boards. The contact spring 1 is flexurally elastic with a first resilient leg 2, with a contact surface 3 and with a second leg 4 executed, which is resilient in the direction of actuation to the first leg 2 towards. In the area of the contact surface 3, the contact spring 1 is slotted. For soldering With a printed circuit board, the contact spring 1 has a soldering area on which a tab 5 is sheared to relieve the soldering on the circuit board. The contact spring 1 is made in one piece, wherein the connection between the first 2 and the second leg 4 has a relatively large bending radius, which allows the spring deflection of the second leg 4 to the first leg 2 out. In this way, even a large overstroke can be compensated.

FIG 2 zeigt eine in einer Leiterplatte 6 eingebaute erfindungsgemäße Kontakteinrichtung in stehender Einbaulage. Hier ist die zuvor beschriebene Kontaktfeder 1 stehend in die Leiterplatte 6 eingebaut. Der Lappen 5 der Kontaktfeder 1 stützt sich an der Leiterplatte 6 ab und gewährleistet somit eine stabile Halterung der Kontaktfeder 1 an der Leiterplatte 6. Der zur Kontakteinrichtung zugehörige Gegenkontakt ist hier in Form zweiter Lötstifte 7 realisiert, die in der Leiterplatte 6 eingelötet sind und in die Nähe der geschlitzten Kontaktfläche 3 reichen. Bei Betätigung der Kontakteinrichtung über den zweiten Schenkel 4 gemäß der dem Pfeil 8 angezeigten Richtung wird die Kontaktfeder 1 durch Verbiegung des ersten federelastischen Schenkels 2 zur Kontaktierung seiner Kontaktfläche 3 mit den Lötstiften 7 gebracht. Nach erfolgter Kontaktierung wird bei Überhub der zweite Schenkel 4 infolge der Verbindung mit dem großen Biegeradius zum ersten federelastischen Schenkel 2 hin durchgedrückt. Der Abstand beider Schenkel 2 und 4 kann weitgehend zum Ausgleich eines Überhubs ausgenutzt werden.FIG. 2 shows a contact device according to the invention which is installed in a printed circuit board 6 in a standing installation position. Here, the contact spring 1 described above is installed standing in the circuit board 6. The tab 5 of the contact spring 1 is supported on the printed circuit board 6 and thus ensures a stable mounting of the contact spring 1 to the circuit board 6. The counter contact associated with the contact device is realized here in the form of second solder pins 7, which are soldered in the circuit board 6 and in the proximity of the slotted contact surface 3 range. Upon actuation of the contact device via the second leg 4 according to the direction indicated by the arrow 8, the contact spring 1 is brought by bending the first spring-elastic leg 2 for contacting its contact surface 3 with the solder pins 7. After contacting the second leg 4 is pushed through the compound with the large bending radius for the first spring-elastic leg 2 at overstroke. The distance between the two legs 2 and 4 can be largely utilized to compensate for an overstroke.

In FIG 3 ist eine Kontaktfeder 1 für eine liegende Einbaulage dargestellt, wobei der Schenkel 2 endseitig nahezu rechtwinklig umgebogen ist.In FIG 3, a contact spring 1 is shown for a horizontal installation position, wherein the leg 2 is bent almost at right angles at the end.

FIG 4 zeigt eine erfindungsgemäße Ausführungsform einer in einer Leiterplatte 6 kontaktierten Kontakteinrichtung in liegender Einbaulage. Diese Kontakteinrichtung unterscheidet sich von der zuvor beschriebenen gemäß FIG 2 insbesondere durch die Ausführung des Gegenkontakts, der hier durch zwei Kontaktpads 9 realisiert ist. Im übrigen entspricht der Aufbau und die Funktion der Kontakteinrichtung der zuvor beschriebenen Ausführungsform in stehender Einbaulage gemäß FIG 2, so daß zur Vermeidung von Wiederholungen auf eine nochmalige Beschreibung hier verzichtet wird.4 shows an embodiment according to the invention of a contacted in a circuit board 6 contact device in a horizontal position. This contact device differs from the previously described according to FIG 2 in particular by the design of the mating contact, which is realized here by two contact pads 9. Moreover, the construction and the function of the contact device of the embodiment described above in the standing installation position according to FIG 2, so that is omitted to avoid repetition of a repeated description here.

Obwohl die vorliegende Erfindung unter Bezugnahme auf die in der beigefügten Zeichnung dargestellte Ausführungsform erläutert ist, sollte berücksichtigt werden, daß damit nicht beabsichtigt ist, die Erfindung nur auf die dargestellte Ausführungsform zu beschränken, sondern alle möglichen Änderungen, Modifizierungen und äquivalente Anordnungen, soweit sie vom Inhalt der Patentansprüche gedeckt sind, einzuschließen.Although the present invention has been described with reference to the embodiment shown in the accompanying drawings, it should be borne in mind that it is not intended to limit the invention to the illustrated embodiment, but all possible changes, modifications and equivalent arrangements, as far as they are Contents of the claims are covered.

Claims (6)

  1. Contact device for a printed circuit board (6), having a spring-loaded contact (1) in the actuation direction (8) and a counter-contact (7,9), with the contact being designed as a resiliently flexible contact spring (1), which comprises a first elastically-sprung leg (2) having a contact surface (3) and a second leg (4), which is able to be deflected in an elastically-sprung manner in the direction of actuation (8) towards the first leg (2), characterised in that
    on actuation of the contact device via the second leg (4), the first elastically-sprung leg (2) can be bent in order to bring the contact surface (3) into contact with the counter-contact (7, 9).
  2. Contact device according to claim 1, characterised in that the contact spring (1) comprises a solder region provided for soldering it to the printed circuit board (6), on which solder region a raised tab (5) for relieving the strain on the solder joint on the printed circuit board (6)is formed.
  3. Contact device according to claim 1 or 2, characterised in that the contact spring (1) comprises a slit contact surface (3).
  4. Contact device according to one of the preceding claims, characterised in that the counter-contact is designed as a solder pin (7) on the printed circuit board (6).
  5. Contact device according to one of the preceding claims, characterised in that the counter-contact is designed as a solder pad (9).
  6. Contact device according to one of the preceding claims, characterised in that the contact spring (1) is a one-piece design and the connection between the first (2) and second leg (4) features a bending radius.
EP19980106265 1997-04-18 1998-04-06 Contact arrangement for a printed circuit board Expired - Lifetime EP0872921B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29707018U DE29707018U1 (en) 1997-04-18 1997-04-18 Contact device for a printed circuit board
DE29707018U 1997-04-18

Publications (3)

Publication Number Publication Date
EP0872921A2 EP0872921A2 (en) 1998-10-21
EP0872921A3 EP0872921A3 (en) 1999-09-15
EP0872921B1 true EP0872921B1 (en) 2007-01-24

Family

ID=8039198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980106265 Expired - Lifetime EP0872921B1 (en) 1997-04-18 1998-04-06 Contact arrangement for a printed circuit board

Country Status (2)

Country Link
EP (1) EP0872921B1 (en)
DE (2) DE29707018U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012201672B4 (en) 2012-02-06 2024-03-28 Robert Bosch Gmbh Hand tool with an electrical switch device
DE102013000904B4 (en) * 2013-01-18 2023-08-24 Kostal Automobil Elektrik Gmbh & Co. Kg Switch contact spring for an electrical switch and corresponding switch

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE667850C (en) * 1935-11-01 1938-11-21 Aeg Contact arrangement for electrical installation switches, in particular automatic switches
ES8207377A1 (en) * 1980-12-22 1982-09-01 Amp Inc Switch device for use on circuit board.
DE3215320A1 (en) * 1982-04-23 1983-10-27 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Plug part, especially a flat plug sleeve
US4620175A (en) * 1985-10-11 1986-10-28 North American Philips Corporation Simple thermostat for dip mounting
CH671648A5 (en) * 1987-02-13 1989-09-15 Contraves Ag Electric contact device for keyboard switch - uses double armed contact element between pushbutton operating element and fixed counter contact pin
DE3814903A1 (en) * 1988-05-03 1989-11-16 Lumberg Karl Gmbh & Co Switchable electrical connector
US4885435A (en) * 1988-12-23 1989-12-05 Telephone And Telegraph Company Cantilever spring switch having multiple fulcrums

Also Published As

Publication number Publication date
EP0872921A3 (en) 1999-09-15
DE59813884D1 (en) 2007-03-15
EP0872921A2 (en) 1998-10-21
DE29707018U1 (en) 1997-07-03

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