EP0990244B1 - Snap-on wafer switch - Google Patents

Snap-on wafer switch Download PDF

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Publication number
EP0990244B1
EP0990244B1 EP99927695A EP99927695A EP0990244B1 EP 0990244 B1 EP0990244 B1 EP 0990244B1 EP 99927695 A EP99927695 A EP 99927695A EP 99927695 A EP99927695 A EP 99927695A EP 0990244 B1 EP0990244 B1 EP 0990244B1
Authority
EP
European Patent Office
Prior art keywords
snap
bead
switch
snap disk
contact
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
EP99927695A
Other languages
German (de)
French (fr)
Other versions
EP0990244A1 (en
Inventor
Stefan Grosskopf
Stéphane Vanhelle
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.)
Inovan Stroebe KG
Inovan GmbH and Co KG Metalle und Bauelemente
Dav SA
Original Assignee
Inovan Stroebe KG
Inovan GmbH and Co KG Metalle und Bauelemente
Dav SA
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 Inovan Stroebe KG, Inovan GmbH and Co KG Metalle und Bauelemente, Dav SA filed Critical Inovan Stroebe KG
Publication of EP0990244A1 publication Critical patent/EP0990244A1/en
Application granted granted Critical
Publication of EP0990244B1 publication Critical patent/EP0990244B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04Energy stored by deformation of elastic members
    • H01H5/30Energy stored by deformation of elastic members by buckling of disc springs
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00Dimensions; Characteristics
    • H01H2227/026Separate dome contact

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  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)

Description

Die Erfindung betrifft einen Schnappscheibenschalter nach dem Oberbegriff des Anspruchs 1 mit einer gewölbten Schnappscheibe, welche in einer im höchsten Punkt der Wölbung angeordneten Sicke einen Schaltkontakt aufweist, welcher als separates Kontaktelement ausgebildet ist, welches in der Sicke befestigt ist.The invention relates to a snap disk switch according to the preamble of the claim 1 with a domed snap disc, which is in the highest point the curvature arranged bead has a switching contact, which as a separate Contact element is formed, which is fixed in the bead.

Derartige Schnappscheibenschalter sind im Stand der Technik hinlänglich bekannt und werden regelmäßig im Bereich von Tastaturen verwendet. Der Schaltkontakt der bekannten Schnappscheibenschalter ist regelmäßig eine kugelförmige Wölbung, welche sich in radialer Richtung der Schnappscheibe nach innen erstreckt. Die kugelförmige Wölbung wird dadurch hergestellt, daß die Schnappscheibe in ein entsprechend geformtes Preßwerkzeug eingelegt wird.Such snap disk switches are well known in the prior art and are used regularly in the field of keyboards. The switch contact of the known snap disk switch is regularly a spherical curvature, which extends inwards in the radial direction of the snap disk. The spherical Curvature is produced in that the snap disc in a corresponding molded press tool is inserted.

Zwar ist die Herstellung derartiger Schnappscheibenschalter relativ einfach und daher kostengünstig, jedoch lassen sie sich nur dort einsetzen, wo sehr geringe Leistungen geschaltet werden. Denn das Material, aus dem die Schnappscheibe besteht, ist nicht zum Schalten größerer Leistungen geeignet. Daher ist der Anwendungsbereich der bekannten Schnappscheibenschalter stark begrenzt. The manufacture of such snap disk switches is relatively simple and therefore inexpensive, but they can only be used where there is very little power be switched. Because the material from which the snap disc is made is not suitable for switching higher powers. Hence the scope the well-known snap disk switch severely limited.

Aus der GB-A-1 195 702 ist ein Schnappscheibenschalter bekannt, welcher in einer im höchsten Punkt der Wölbung angeordneten Sicke einen als separates Kontaktelement ausgebildeten Schaltkontakt aufweist. Angaben über die Befestigung des Schaltkontakts enthält die genannte Druckschrift nicht.From GB-A-1 195 702 a snap disk switch is known, which in one a bead arranged as a separate contact element at the highest point of the curvature trained switching contact. Information about the attachment of the Switching contact does not contain the mentioned publication.

Des weiteren ist aus der US-A-4,438,304 ein Schnappscheibenschalter bekannt, bei welchem unterhalb und oberhalb der Wölbung der Schnappscheibe ein Gegenkontakt angeordnet ist. Hierdurch wird erreicht, daß der Schnappscheibenschalter die Funktion eines Wechselschalters hat. Der am höchsten Punkt der Wölbung angeordnete Schaltkontakt ist in die Schnappscheibe eingenietet. Im Bereich der Nietung ist die Schnappscheibe ebenfalls gewölbtFurthermore, a snap disk switch is known from US-A-4,438,304 which a counter contact below and above the curvature of the snap disc is arranged. This ensures that the snap disk switch Has the function of a changeover switch. The one located at the highest point of the curvature Switch contact is riveted into the snap disk. In the field of riveting the snap disc is also curved

Es ist Aufgabe der Erfindung, einen eingangs genannten Schnappscheibenschalter derart auszubilden, daß er einfach herstellbar ist und eine lange Lebensdauer hat. It is an object of the invention to provide a snap disk switch form such that it is easy to manufacture and has a long life.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The solution to this problem results from the characteristics of the characteristic Part of claim 1. Advantageous further developments of the invention result from the subclaims.

Gemäß der Erfindung ist der Schaltkontakt als separates Kontaktelement ausgebildet, welches in der Sicke befestigt ist. Durch die separate, nicht mit der Schnappscheibe einstückige Ausbildung des Kontaktelements ist es in vorteilhafter Weise möglich, das Kontaktelement aus einem anderen Material herzustellen als die Schnappscheibe. Das Material der Schnappscheibe kann somit im Hinblick auf die Feder- beziehungsweise Schnappwirkung der Schnappscheibe ausgewählt werden, wohingegen das Material des Schaltkontakts im Hinblick auf ein optimales Schaltverhalten ausgewählt werden kann.According to the invention, the switch contact is designed as a separate contact element, which is attached in the bead. Through the separate, not with the snap disc one-piece design of the contact element, it is advantageous possible to manufacture the contact element from a different material than that Snap disk. The material of the snap disc can thus with regard to the Spring or snap action of the snap disk can be selected, whereas the material of the switch contact with regard to an optimal switching behavior can be selected.

Besonders vorteilhaft ist es, daß der Schaltkontakt auf der Schnappscheibe aufgenietet ist. Diese Befestigung hat sich im Hinblick auf die Lebensdauer als sehr vorteilhaft herausgestellt.It is particularly advantageous that the switch contact is riveted onto the snap disk is. This attachment has proven to be very durable emphasized advantageous.

Als besonders vorteilhaft hat sich herausgestellt, daß die Sicke als ebene Fläche ausgebildet ist. Hierdurch wird eine neutrale Zone für den mechanisch befestigten Schaltkontakt geschaffen. Durch die Ausbildung der Sicke als ebene Fläche erfolgt eine Unterbrechung der Biegespannung der Schnappscheibe. Die Befestigung des Schaltkontakts ist daher frei von Materialbewegungen der Schnappscheibe, wodurch die Befestigung sehr langlebig wird.It has been found to be particularly advantageous that the bead is designed as a flat surface is. This creates a neutral zone for the mechanically attached switch contact created. The formation of the bead as a flat surface results in a Interruption of the snap disc bending stress. The attachment of the Switch contact is therefore free of material movements of the snap disk, which the attachment becomes very durable.

Bei einer weiteren besonderen Ausführungsform der Erfindung erstreckt sich die Sicke in radialer Richtung der Schnappscheibe nach außen. Dies wirkt sich zum einen günstig auf die Federwirkung der Schnappscheibe aus. Zum anderen wird dadurch erreicht, daß der Schaltweg der Schnappscheibe durch das Aufbringen des Kontaktelementes nicht verringert wird. In a further special embodiment of the invention, the Bead in the radial direction of the snap disc to the outside. On the one hand, this affects favorable on the spring action of the snap disc. On the other hand it will achieved that the switching path of the snap disc by applying the Contact element is not reduced.

Weitere Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines besonderen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.Further features of the present invention result from the following Description of a particular embodiment with reference to the Drawing.

Es zeigt

Figur 1
eine erfindungsgemäß ausgebildete Schnappscheibe mit einem aufgenieteten Kontaktelement in der Draufsicht,
Figur 2
die in Figur 1 dargestellte Schnappscheibe in Seitenansicht im Schnitt,
Figur 3
eine herkömmlich ausgebildete Schnappscheibe und
Figur 4
die in Figur 3 dargestellte Schnappscheibe in Seitenansicht im Schnitt
It shows
Figure 1
a snap disc designed according to the invention with a riveted contact element in plan view,
Figure 2
the snap disk shown in Figure 1 in side view in section,
Figure 3
a conventionally designed snap disc and
Figure 4
the snap disk shown in Figure 3 in side view in section

Wie den Figuren 1 und 2 entnommen werden kann, weist eine gewölbte Schnappscheibe 1 im höchsten Punkt ihrer Wölbung eine Sicke 2 auf. Die Sicke 2 ist als ebene Fläche ausgebildet, welche durch Kaltverformung hergestellt wurde. Die Sikke 2 wird somit durch einen Rand begrenzt, welcher scharfkantig von der Schnappscheibe weggebogen ist. Der Rand könnte aber auch als Rille ausgebildet sein.As can be seen in FIGS. 1 and 2, a domed snap disc has 1 a bead 2 at the highest point of its curvature. The bead 2 is as formed flat surface, which was produced by cold forming. The Sikke 2 is thus delimited by an edge which is sharp-edged from the snap disc is bent away. The edge could also be designed as a groove.

Die Sicke 2 erstreckt sich in radialer Richtung der Schnappscheibe 1 nach außen. Die Sicke 2 weist ein separates Kontaktelement 3 auf, welches sich in radialer Richtung der Schnappscheibe 1 nach innen erstreckt. Das Kontaktelement 3 ist in einer Öffnung in der Sicke 2 eingenietet. Das Kontaktelement 3 besteht aus Silberwerkstoffen oder Mehrschichtwerkstoffen, wohingegen die Schnappscheibe 1 aus einem Federwerkstoff, wie zum Beispiel Edelstahl, Kupferberyllium oder Federbronze besteht. The bead 2 extends in the radial direction of the snap disc 1 to the outside. The bead 2 has a separate contact element 3, which is in a radial Direction of the snap disc 1 extends inwards. The contact element 3 is riveted into an opening in the bead 2. The contact element 3 consists of silver materials or multi-layer materials, whereas the snap disc 1 a spring material, such as stainless steel, copper beryllium or spring bronze consists.

Wenngleich die Schnappscheibe 1 wegen ihrer Wölbung auch teilweise einen halbschalenförmigen Verlauf hat, so ist sie doch etwa sternförmig ausgebildet. Hierdurch ergeben sich vier Aufsetzpunkte 4, mittels der die Schnappscheibe 1 in einem Schaltelement befestigbar ist.Although the snap disc 1 is partly half-shell-shaped because of its curvature Has course, so it is approximately star-shaped. hereby there are four mounting points 4, by means of which the snap disc 1 in one Switching element can be attached.

Der Vollständigkeit halber sei noch erwähnt, daß die Schnappscheibe 1 derart in einem Schnappelement befestigt wird, daß in eingebautem Zustand der Schnappscheibe 1 gegenüber dem Kontaktelement 3 ein weiteres, ähnlich ausgebildetes Kontaktelement angeordnet ist.For the sake of completeness, it should also be mentioned that the snap disc 1 is in a snap element is attached, that in the installed state of the snap disc 1 compared to the contact element 3, another, similarly formed Contact element is arranged.

Im Gegensatz zu der in den Figuren 1 und 2 dargestellten Schnappscheibe weist die in den Figuren 3 und 4 dargestellte herkömmliche Schnappscheibe 1" kein separates Kontaktelement auf. Der Schaltkontakt wird durch eine kugelförmige Sicke 2" dargestellt, welche sich in radialer Richtung der Schnappscheibe 1" nach innen erstreckt. Hierdurch ist es nicht möglich, größere Leistungen zu schalten.In contrast to the snap disk shown in Figures 1 and 2 the conventional snap disk 1 "shown in FIGS. 3 and 4 is not a separate one Contact element on. The switch contact is through a spherical bead 2 " shown, which extends in the radial direction of the snap disc 1 "inwards. This makes it impossible to switch larger outputs.

Claims (3)

  1. Snap disk switch with a domed snap disk (1', 1") having a switch contact (3') in a bead (2', 2'') arranged at the highest point of the dome, said contact being designed as a separate contact element attached in the bead (2''), characterised in that the bead (2') has an opening into which the contact element (3') is riveted.
  2. Snap disk switch according to Claim 1, characterised in that the bead (2') is formed as a planar surface.
  3. Snap disk switch according to Claim 1 or 2, characterised in that the bead (2') extends outwards in the radial direction of the snap disk (1').
EP99927695A 1998-04-17 1999-04-17 Snap-on wafer switch Expired - Lifetime EP0990244B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19816946 1998-04-17
DE19816946A DE19816946C1 (en) 1998-04-17 1998-04-17 Snap disk switch
PCT/DE1999/001193 WO1999054899A1 (en) 1998-04-17 1999-04-17 Snap-on wafer switch

Publications (2)

Publication Number Publication Date
EP0990244A1 EP0990244A1 (en) 2000-04-05
EP0990244B1 true EP0990244B1 (en) 2002-11-20

Family

ID=7864760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99927695A Expired - Lifetime EP0990244B1 (en) 1998-04-17 1999-04-17 Snap-on wafer switch

Country Status (4)

Country Link
EP (1) EP0990244B1 (en)
DE (2) DE19816946C1 (en)
ES (1) ES2203149T3 (en)
WO (1) WO1999054899A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10051500C2 (en) * 2000-10-17 2002-10-24 Inovan Stroebe Switching element with a snap disk and a snap disk switch

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2262777A (en) * 1940-09-21 1941-11-18 John M Roper Quick acting positive contact switch
US2977440A (en) * 1958-11-05 1961-03-28 Benjamin S Gerson Flasher switch
GB1195702A (en) * 1967-05-12 1970-06-24 Harry Stanley Woodhead Hermetically Sealed Push Switch
GB1224004A (en) * 1967-08-18 1971-03-03 Drayton Hydroflex Ltd Improvements in or relating to snap-action switching arrangements
DE7837597U1 (en) * 1978-12-19 1979-04-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Keypad with several push buttons
US4438304A (en) * 1982-10-01 1984-03-20 Cherry Electrical Products Corporation Double throw snap action switch
FR2735276B1 (en) * 1995-06-12 1997-07-18 Itt Composants Instr TOUCH-EFFECT SWITCH AND TRIGGERING DEVICE FOR SUCH A SWITCH

Also Published As

Publication number Publication date
ES2203149T3 (en) 2004-04-01
DE59903456D1 (en) 2003-01-02
DE19816946C1 (en) 2000-03-09
EP0990244A1 (en) 2000-04-05
WO1999054899A1 (en) 1999-10-28

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