EP0990244A1 - Snap-on wafer switch - Google Patents

Snap-on wafer switch

Info

Publication number
EP0990244A1
EP0990244A1 EP99927695A EP99927695A EP0990244A1 EP 0990244 A1 EP0990244 A1 EP 0990244A1 EP 99927695 A EP99927695 A EP 99927695A EP 99927695 A EP99927695 A EP 99927695A EP 0990244 A1 EP0990244 A1 EP 0990244A1
Authority
EP
European Patent Office
Prior art keywords
snap
snap disk
bead
disk
contact element
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.)
Granted
Application number
EP99927695A
Other languages
German (de)
French (fr)
Other versions
EP0990244B1 (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 GmbH and Co KG
Inovan GmbH and Co KG Metalle und Bauelemente
Dav SA
Original Assignee
Inovan GmbH and Co 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 GmbH and Co KG, Inovan GmbH and Co KG Metalle und Bauelemente, Dav SA filed Critical Inovan GmbH and Co 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

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-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
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/30—Energy stored by deformation of elastic members by buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/026—Separate dome contact

Definitions

  • the invention relates to a snap disk switch according to the preamble of claim 1 with a curved snap disk which has a switching contact in a bead arranged in the highest point of the curvature.
  • Such snap disk switches are well known in the prior art and are used regularly in the field of keyboards.
  • the switching contact of the known snap disk switches is regularly a spherical curvature which extends inwards in the radial direction of the snap disk.
  • the spherical curvature is produced by inserting the snap disk into a correspondingly shaped pressing tool.
  • the switch contact is designed as a separate contact element which is fastened in the bead. Due to the separate design of the contact element, which is not integral with the snap disk, it is advantageously possible to produce the contact element from a different material than the snap disk.
  • the material of the snap disk can thus be selected with regard to the spring or snap action of the snap disk, whereas the material of the contact contact can be selected with regard to an optimal switching behavior.
  • the switch contact can be welded or riveted onto the snap disk. Both fastenings have proven to be very advantageous in terms of service life.
  • the bead As a flat surface, This creates a neutral zone for the mechanically attached switch contact.
  • the bending stress of the snap disc is interrupted.
  • the attachment of the switch contact is therefore free of material movements of the snap disk, which makes the attachment very durable.
  • the bead extends outward in the radial direction of the snap disk. On the one hand, this has a favorable effect on the spring action of the snap disk. On the other hand, the switching path of the snap disk is not reduced by the application of the contact element.
  • FIG. 1 is a top view of a snap disk designed according to the invention with a welded-on contact element
  • FIG. 2 shows the snap disk shown in FIG. 2 in a side view in section
  • FIG. 3 shows a top view of a snap disk with a riveted contact element
  • FIG. 4 shows the snap disk shown in FIG. 3 in a side view in section
  • Figure 5 is a conventionally designed snap disc
  • Figure 6 shows the snap disk shown in Figure 5 in side view in section.
  • a domed snap disc 1 has a bead 2 at the highest point of its curvature.
  • the bead 2 is formed as a flat surface, which was produced by cold working.
  • the sink 2 is thus delimited by an edge which is bent away sharply from the snap disk.
  • the edge could also be designed as a groove.
  • 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 extends inwards in the radial direction of the snap disk 1.
  • the contact element 3 is welded onto the snap disk 1.
  • the contact element 3 consists of silver materials or multi-layer materials, whereas the snap disk 1 consists of a spring material, such as stainless steel, copper beryllium or spring bronze.
  • the snap disc 1 also partly has a half-shell shape because of its curvature, it is nevertheless approximately star-shaped. This results in four mounting points 4, by means of which the snap disc 1 can be fastened in a switching element.
  • the snap disk 1 is fastened in a snap element in such a way that in the installed state of the snap disk 1, a further, similarly designed contact element is arranged relative to the contact element 3.
  • the snap disk shown in FIGS. 3 and 4 essentially corresponds to the snap disk shown in FIGS. 1 and 2.
  • the same elements are provided with the same reference symbols, the reference symbols being provided with a dash to distinguish the elements.
  • the snap disk shown in FIGS. 3 and 4 The only difference between the snap disk shown in FIGS. 3 and 4 is that the bead 2 'has an opening in which a contact element 3' is riveted.
  • the snap disk 1 ' is otherwise designed in exactly the same way as the snap disk 1.
  • the conventional snap disk 1 "shown in FIGS. 5 and 6 does not have a separate contact element.
  • the switching contact is represented by a spherical bead 2" which extends in the radial direction of the snap disk 1 " extends inwards, making it impossible to switch larger outputs.

Landscapes

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

Abstract

The invention relates to a snap-on wafer switch (1) having bead (2) arranged at the highest point of an arch. A separate contact element (3) is fixed in the bead (2).

Description

SchnappscheibenschalterSnap disk switch
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.The invention relates to a snap disk switch according to the preamble of claim 1 with a curved snap disk which has a switching contact in a bead arranged in the highest point of the curvature.
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 ku- gelförmige 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 switching contact of the known snap disk switches is regularly a spherical curvature which extends inwards in the radial direction of the snap disk. The spherical curvature is produced by inserting the snap disk into a correspondingly shaped pressing tool.
Zwar ist die Herstellung derartiger Schnappscheibenschalter relativ einfach und daher kostengünstig, jedoch lassen sie sich nur dort einsetzen, wo sehr geringe Lei- stungen 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. Es ist Aufgabe der Erfindung einen eingangs genannten Schnappscheibenschalter derart auszubilden, daß er zur Schaltung größerer Leistungen geeignet ist.Although the manufacture of such snap disk switches is relatively simple and therefore inexpensive, they can only be used where very low powers are switched. Because the material from which the snap disc is made is not suitable for switching larger outputs. The field of application of the known snap disk switches is therefore very limited. It is an object of the invention to design a snap disk switch mentioned at the outset in such a way that it is suitable for switching larger powers.
Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved from the features of the characterizing 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 Schnapp- scheibe 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 Schaitkontakts im Hinblick auf ein optimales Schalt- verhalten ausgewählt werden kann.According to the invention, the switch contact is designed as a separate contact element which is fastened in the bead. Due to the separate design of the contact element, which is not integral with the snap disk, it is advantageously possible to produce the contact element from a different material than the snap disk. The material of the snap disk can thus be selected with regard to the spring or snap action of the snap disk, whereas the material of the contact contact can be selected with regard to an optimal switching behavior.
Der Schaltkontakt kann auf die Schnappscheibe aufgeschweißt oder aufgenietet sein. Beide Befestigungen haben sich im Hinblick auf die Lebensdauer als sehr vorteilhaft herausgestellt.The switch contact can be welded or riveted onto the snap disk. Both fastenings have proven to be very advantageous in terms of service life.
Als besonders vorteilhaft hat sich herausgestellt, die Sicke als ebene Fläche auszubilden. 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 proven to be particularly advantageous to design the bead as a flat surface. This creates a neutral zone for the mechanically attached switch contact. By forming the bead as a flat surface, the bending stress of the snap disc is interrupted. The attachment of the switch contact is therefore free of material movements of the snap disk, which makes the attachment very durable.
Bei einer weiteren besonderen Ausführungsform der Erfindung erstreckt sich die Sicke in radialer Richtung der Schnappscheibe nach außen. Dies wirkt sich zum ei- nen 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. Weitere Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines besonderen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.In a further special embodiment of the invention, the bead extends outward in the radial direction of the snap disk. On the one hand, this has a favorable effect on the spring action of the snap disk. On the other hand, the switching path of the snap disk is not reduced by the application of the contact element. Further features of the present invention result from the following description of a particular exemplary embodiment with reference to the drawing.
Es zeigtIt shows
Figur 1 eine erfindungsgemäß ausgebildete Schnappscheibe mit einem aufgeschweißten Kontaktelement in der Draufsicht,FIG. 1 is a top view of a snap disk designed according to the invention with a welded-on contact element,
Figur 2 die in Figur 2 dargestellte Schnappscheibe in Seitenansicht im Schnitt,FIG. 2 shows the snap disk shown in FIG. 2 in a side view in section,
Figur 3 eine erfindungsgemäß ausgebildete Schnappscheibe mit einem aufgenieteten Kontaktelement in der Draufsicht,FIG. 3 shows a top view of a snap disk with a riveted contact element,
Figur 4 die in Figur 3 dargestellte Schnappscheibe in Seitenansicht im Schnitt,FIG. 4 shows the snap disk shown in FIG. 3 in a side view in section,
Figur 5 eine herkömmlich ausgebildete Schnappscheibe undFigure 5 is a conventionally designed snap disc and
Figur 6 die in Figur 5 dargestellte Schnappscheibe in Seitenansicht im Schnitt.Figure 6 shows the snap disk shown in Figure 5 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 Sik- ke 2 wird somit durch einen Rand begrenzt, welcher scharfkantig von der Schnapp- scheibe weggebogen ist. Der Rand könnte aber auch als Rille ausgebildet sein.As can be seen from FIGS. 1 and 2, a domed snap disc 1 has a bead 2 at the highest point of its curvature. The bead 2 is formed as a flat surface, which was produced by cold working. The sink 2 is thus delimited by an edge which is bent away sharply from the snap disk. 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 auf die Schnappscheibe 1 aufgeschweißt. Das Kontaktelement 3 besteht aus Silberwerkstoffen oder Mehrschichtwerkstoffen, wohingegen die Schnappscheibe 1 aus einem Federwerkstoff, wie zum Beispiel Edelstahl, Kupferberyllium oder Federbronze besteht. Wenngleich die Schnappscheibe 1 wegen ihrer Wölbung auch teilweise einen halb- schalenförmigen Verlauf hat, so ist sie doch etwa sternförmig ausgebildet. Hierdurch ergeben sich vier Aufsetzpunkte 4, mittels der die Schnappscheibe 1 in einem Schalteiement befestigbar ist.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 extends inwards in the radial direction of the snap disk 1. The contact element 3 is welded onto the snap disk 1. The contact element 3 consists of silver materials or multi-layer materials, whereas the snap disk 1 consists of a spring material, such as stainless steel, copper beryllium or spring bronze. Although the snap disc 1 also partly has a half-shell shape because of its curvature, it is nevertheless approximately star-shaped. This results in four mounting points 4, by means of which the snap disc 1 can be fastened in a switching element.
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 disk 1 is fastened in a snap element in such a way that in the installed state of the snap disk 1, a further, similarly designed contact element is arranged relative to the contact element 3.
Die in den Figuren 3 und 4 dargestellte Schnappscheibe entspricht im wesentlichen der in den Figuren 1 und 2 dargestellten Schnappscheibe. Gleiche Elemente sind mit gleichen Bezugszeichen versehen, wobei die Bezugszeichen zur Unterscheidung der Elemente mit einem Strich versehen sind.The snap disk shown in FIGS. 3 and 4 essentially corresponds to the snap disk shown in FIGS. 1 and 2. The same elements are provided with the same reference symbols, the reference symbols being provided with a dash to distinguish the elements.
Der einzige Unterschied der in den Figuren 3 und 4 dargestellten Schnappscheibe besteht darin, daß die Sicke 2' eine Öffnung aufweist, in der ein Kontaktelement 3' eingenietet ist. Die Schnappscheibe 1 ' ist ansonsten genauso ausgebildet wie die Schnappscheibe 1.The only difference between the snap disk shown in FIGS. 3 and 4 is that the bead 2 'has an opening in which a contact element 3' is riveted. The snap disk 1 'is otherwise designed in exactly the same way as the snap disk 1.
Im Gegensatz zu den in den Figuren 1 bis 4 dargestellten Schnappscheiben weist die in den Figuren 5 und 6 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 disks shown in FIGS. 1 to 4, the conventional snap disk 1 "shown in FIGS. 5 and 6 does not have a separate contact element. The switching contact is represented by a spherical bead 2" which extends in the radial direction of the snap disk 1 " extends inwards, making it impossible to switch larger outputs.

Claims

Patentansprüche claims
1. Schnappscheibenschalter mit einer gewölbten Schnappscheibe (1 , 1 ', 1"), welche in einer im höchsten Punkt der Wölbung angeordneten Sicke (2, 2',2") einen Schaltkontakt (3, 3') aufweist, dadurch gekennzeichnet, daß der Schaltkontakt (3, 3') als separates Kontaktelement (3, 3') ausgebildet ist, welches in der Sicke (2, 2') befestigt ist.1. Snap disk switch with a curved snap disk (1, 1 ', 1 "), which has a switching contact (3, 3') in a bead arranged at the highest point of the curvature (2, 2 ', 2"), characterized in that the switching contact (3, 3 ') is designed as a separate contact element (3, 3') which is fastened in the bead (2, 2 ').
2. Schnappscheiben-Schalter nach Anspruch 1 , dadurch gekennzeichnet, daß der Schaltkontakt (3) auf die Schnappscheibe (1 ) aufgeschweißt ist.2. Snap disc switch according to claim 1, characterized in that the switching contact (3) on the snap disc (1) is welded.
3. Schnappscheiben-Schalter nach Anspruch 1 , dadurch gekennzeichnet, daß der Schaltkontakt (3') auf die Schnappscheibe (1 ') aufgenietet ist.3. snap disk switch according to claim 1, characterized in that the switching contact (3 ') on the snap disk (1') is riveted.
4. Schnappscheiben-Schalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sich die Sicke (2, 2') in radialer Richtung der Schnappscheibe (1 , 1') nach außen erstreckt.4. snap disk switch according to one of claims 1 to 3, characterized in that the bead (2, 2 ') extends in the radial direction of the snap disk (1, 1') to the outside.
5. Schnappscheiben-Schalter nach Anspruch 4, dadurch gekennzeichnet, daß sich die Sicke (2, 2') in radialer Richtung der Schnappscheibe (1 , 1 ') nach außen erstreckt. 5. snap disk switch according to claim 4, characterized in that the bead (2, 2 ') extends in the radial direction of the snap disk (1, 1') to the outside.
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
DE19816946A DE19816946C1 (en) 1998-04-17 1998-04-17 Snap disk switch
DE19816946 1998-04-17
PCT/DE1999/001193 WO1999054899A1 (en) 1998-04-17 1999-04-17 Snap-on wafer switch

Publications (2)

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9954899A1 *

Also Published As

Publication number Publication date
EP0990244B1 (en) 2002-11-20
DE59903456D1 (en) 2003-01-02
ES2203149T3 (en) 2004-04-01
DE19816946C1 (en) 2000-03-09
WO1999054899A1 (en) 1999-10-28

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