EP0505682B1 - Push-button switch - Google Patents

Push-button switch Download PDF

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Publication number
EP0505682B1
EP0505682B1 EP19920101239 EP92101239A EP0505682B1 EP 0505682 B1 EP0505682 B1 EP 0505682B1 EP 19920101239 EP19920101239 EP 19920101239 EP 92101239 A EP92101239 A EP 92101239A EP 0505682 B1 EP0505682 B1 EP 0505682B1
Authority
EP
European Patent Office
Prior art keywords
contact
axle
push
whip
button switch
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
EP19920101239
Other languages
German (de)
French (fr)
Other versions
EP0505682A1 (en
Inventor
Alfred Pfenninger
Fritz Kunz
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.)
Feller AG
Original Assignee
Feller 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 Feller AG filed Critical Feller AG
Publication of EP0505682A1 publication Critical patent/EP0505682A1/en
Application granted granted Critical
Publication of EP0505682B1 publication Critical patent/EP0505682B1/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • H01H13/60—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force with contact-driving member moved alternately in opposite directions
    • 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
    • H01H1/20—Bridging contacts
    • 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
    • H01H1/32—Self-aligning contacts

Definitions

  • the present invention relates to a push button switch with at least one pivotably mounted contact rocker, according to the preamble of claim 1. From DE-A-3 151 501 a push button switch of this type has become known.
  • the contact rocker and the rocker bearings consist of metal, flat stamped parts, the contact rocker additionally being provided with contact elements. This large number of different parts stands in the way of fully automatic production of the pushbutton switches.
  • the object underlying the present invention was to design and arrange the moving parts such as plunger, contact rocker, contact carrier and toggle spring as well as the parts serving for the storage thereof in such a way that, according to international regulations, these parts have at least a 3 mm air gap between live parts that are open Contacts are separated, have and can be produced economically, in particular fully automatically.
  • a particularly preferred embodiment of the invention provides that the contact axis consists of drawn wire made of silver.
  • the bore is positioned at a distance from the pivot axis such that there is at least 3 mm of air clearance between the contact axis and the contact points not in contact with it.
  • a pawl spring is preferably used as the plunger.
  • the design of the electrical push button switch according to the invention reduces the manufacturing effort of the moving parts of the switch;
  • the contact rocker made of plastic and the contact axis can be economically manufactured in large quantities.
  • Another important advantage is the rotatability of the contact axis. This prevents rapid wear of the contacting parts of the contact axis with the contact points due to sparking and mechanical friction compared to known solutions, which results in an extended service life of the electrical pushbutton switch.
  • the reduced wear also reduces sparking due to an irregular surface structure in the contact area, which leads to better switching characteristics.
  • the very compact design according to the invention makes it considerably easier to maintain the prescribed air gaps between live parts.
  • a push button 2 In a housing part 1 made of insulating material, a push button 2 is guided axially displaceably. The push button 2 can be moved against the action of a compression spring 3 downwards.
  • a plunger 4 designed as a pawl spring is movably fastened on the inside in a recess in such a way that after a lateral deflection it returns to the starting position according to FIG. 1 in a resilient manner.
  • the contact rocker 5 Under the pawl spring 4, the contact rocker 5 is mounted by means of the rocker support axis 5 'tiltable in a corresponding storage in the housing part 1.
  • the contact axis 8 held in the bore 7 of the contact rocker 5 is connected to two contact points 9 and 10 (contact point 10 in FIG. 1 covered by the contact rocker 5).
  • the electrical connection is ensured by touching the contact axis 8 with the contact points 9 and 10 under the action of the spring force of the rocker spring 6. In the second tilt position, the two contact points 11 and 12 are now separated from one another.
  • the smallest distance between the current-carrying contacts 9, 10 and the contact axis 8 to the contact points 11 and 12 is the distance between the contact points 9 and 11, respectively.
  • 10 and 12 since the contact axis 8, as can be seen in FIG. 1, is approximately the same distance from it. This distance is determined by the full tilt angle of the contact rocker and the Distance of the bore 7 from the rocker support axis 5 '. This distance can now be easily adjusted to the minimum required 3 mm by this arrangement according to the invention.
  • the pawl spring 4 which first moves in the pressure direction, on the upper edge of the contact rocker 5, which is only slightly rounded in the vicinity of the rocker support axis 5 ', and bends in the direction of the tilt position.
  • the upper edge of the contact rocker 5 has an edge 13 towards the pawl spring 4, respectively. 13 ′ on.
  • the now curved pawl spring 4 transfers the pressure movement to this edge 13, which generates a torque counter to the tilt position of the contact rocker 5 held by the tilt spring 6 and causes it to tilt into the second tilt position.
  • the two contact points 9 and 10 are thus electrically separated from one another and the contact points 11 and 12 are connected in an electrically conductive manner via the contact axis 8.
  • the fact that the contact axis 8 is preferably held with play in the bore 7 of the contact rocker 5, it can when touching the contact points 9, 10 respectively. Rotate 11, 12 around the longitudinal axis because this touching movement is a sliding contact from the tilting movement. The rotation is then caused by the friction.
  • the contact axis 8 is guided when the contact rocker 5 moves into a tilted position over this edge 9 ', 11', which leads to reinforcement the rotational movement of the contact axis 8 about its longitudinal axis, as can be seen in FIG. 2.
  • the contact does not occur in each tilt position with the same point on the contact axis 8, with which the wear is distributed over the entire circumference of the contact axis at the contact point due to the contact formation, which, compared to contact points that always touch each other in the same place, leads to considerably longer service life for the contacts.

Description

Die vorliegende Erfindung betrifft einen Drucktastenschalter mit mindestens einer schwenkbar gelagerten Kontaktwippe, gemäß dem Oberbegriff von Anspruch 1. Aus der DE-A-3 151 501 ist ein Druchtastenschalter dieser Art bekannt geworden.The present invention relates to a push button switch with at least one pivotably mounted contact rocker, according to the preamble of claim 1. From DE-A-3 151 501 a push button switch of this type has become known.

Bei bekannten Drucktastenschaltern besteht die Kontaktwippe und die Wippenlager aus metallenen, flächenhaften Stanzteilen, wobei die Kontaktwippe zusätzlich mit Kontaktelementen versehen ist. Diese Viehlzahl von verschiedenen Teilen steht einer vollautomatischen Fertigung der Drucktastenschalter entgegen.In known push button switches, the contact rocker and the rocker bearings consist of metal, flat stamped parts, the contact rocker additionally being provided with contact elements. This large number of different parts stands in the way of fully automatic production of the pushbutton switches.

Die der vorliegenden Erfindung zugrunde liegende Aufgabe bestand darin, die beweglichen Teile wie Stössel, Kontaktwippe , Kontaktträger und Kippfeder sowie die für die Lagerung derselben dienenden Teile so auszubilden und anzuordnen, dass diese Teile gemäss internationalen Vorschriften mindestens 3mm Luftstrecke zwischen spannungsführenden Teilen, die bei geöffneten Kontakten getrennt sind, aufweisen und auf wirtschaftliche Weise, insbesondere vollautomatsich, herzustellen sind.The object underlying the present invention was to design and arrange the moving parts such as plunger, contact rocker, contact carrier and toggle spring as well as the parts serving for the storage thereof in such a way that, according to international regulations, these parts have at least a 3 mm air gap between live parts that are open Contacts are separated, have and can be produced economically, in particular fully automatically.

Diese Aufgabe wird erfindungsgemäss durch die Kombination von Merkmalen nach Anspruch 1 gelöst.According to the invention, this object is achieved by the combination of features according to claim 1.

Eine besonders bevorzugte Ausführungsform der Erfindung sieht vor, dass die Kontaktachse aus gezogenem Draht aus Silber besteht.A particularly preferred embodiment of the invention provides that the contact axis consists of drawn wire made of silver.

In einer weiteren Ausführungsform der Erfindung ist die Bohrung in einem derartigen Abstand zur Schwenkachse positioniert, dass zwischen der Kontaktachse und den nicht mit ihr in Berührung stehenden Kontaktpunkten mindestens 3 mm Luftabstand vorhanden sind. Vorzugsweise wird als Stössel eine Klinkenfeder verwendet.In a further embodiment of the invention, the bore is positioned at a distance from the pivot axis such that there is at least 3 mm of air clearance between the contact axis and the contact points not in contact with it. A pawl spring is preferably used as the plunger.

Die erfindungsgemässe Ausgestaltung des elektrischen Drucktastenschalters verringert einmal den Herstellungsaufwand der beweglichen Teile des Schalters; namentlich sind die Kontaktwippe aus Kunststoff sowie die Kontaktachse wirtschaftlich in grossen Stückzahlen herzustellen. Als weiteren wesentlichen Vorteil ist die Drehbarkeit der Kontaktachse anzusehen. Damit wird ein schneller Verschleiss der sich berührenden Teile der Kontaktachse mit den Kontaktpunkten infolge Funkenbildung und mechanischer Reibung im Vergleich zu bekannten Lösungen vermieden, was eine verlängerte Lebensdauer des elektrischen Drucktastenschalters zur Folge hat. Ebenfalls wird durch den geringeren Verschleiss die Funkenbildung infolge einer unregelmässigen Oberflächenstruktur im Kontaktbereich vermindert, was zu einer besseren Schaltcharakteristik führt. Ebenfalls wird durch die erfindungsgemäss sehr kompakte Bauweise die Einhaltung der vorgeschriebenen Luftstrecken zwischen spannungsführenden Teilen wesentlich erleichtert.The design of the electrical push button switch according to the invention reduces the manufacturing effort of the moving parts of the switch; In particular, the contact rocker made of plastic and the contact axis can be economically manufactured in large quantities. Another important advantage is the rotatability of the contact axis. This prevents rapid wear of the contacting parts of the contact axis with the contact points due to sparking and mechanical friction compared to known solutions, which results in an extended service life of the electrical pushbutton switch. The reduced wear also reduces sparking due to an irregular surface structure in the contact area, which leads to better switching characteristics. Likewise, the very compact design according to the invention makes it considerably easier to maintain the prescribed air gaps between live parts.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von Zeichnungen noch näher erläutert.An embodiment of the invention is described below explained in more detail by drawings.

Es zeigen

  • Fig. 1 den Querschnitt durch einen Schalter im Bereich der Kontaktwippe;
  • Fig. 2 ein Detailschnitt des Kontaktbereiches von Fig. 1.
Show it
  • 1 shows the cross section through a switch in the area of the contact rocker.
  • FIG. 2 shows a detail section of the contact area from FIG. 1.

In einem aus Isoliermaterial bestehenden Gehäuseteil 1 ist eine Drucktaste 2 axial verschiebbar geführt. Die Drucktaste 2 lässt sich gegen die Wirkung einer Druckfeder 3 gegen unten bewegen. In der Drucktaste 3 ist innenseitig in einer Ausnehmung einen als Klinkenfeder ausgebildeten Stössel 4 derart beweglich befestigt, dass sie nach einer seitlichen Auslenkung jeweils wieder federnd in die Ausgangsstellung nach Fig. 1 zurückkehrt.In a housing part 1 made of insulating material, a push button 2 is guided axially displaceably. The push button 2 can be moved against the action of a compression spring 3 downwards. In the pushbutton 3, a plunger 4 designed as a pawl spring is movably fastened on the inside in a recess in such a way that after a lateral deflection it returns to the starting position according to FIG. 1 in a resilient manner.

Unter der Klinkenfeder 4 ist die Kontaktwippe 5 mittels der Wippenträgerachse 5′ kippbar in einer entsprechenden Lagerung im Gehäuseteil 1 gelagert. Eine Kippfeder 6, welche am Boden des Gehäuseteiles 1 abgestützt ist, hält dabei die Kontaktwippe 5 in einer der zwei Kippstellungen fest. Die in der Bohrung 7 der Kontaktwippe 5 gehaltene Kontaktachse 8 steht mit zwei Kontaktpunkten 9 und 10 (Kontaktpunkt 10 in Fig. 1 durch die Kontaktwippe 5 abgedeckt) in Verbindung. Die elektrische Verbindung wird dabei durch das Berühren der Kontaktachse 8 mit den Kontaktpunkten 9 und 10 unter der Wirkung der Federkraft der Kippfeder 6 sichergestellt. In der zweiten Kippstellung sind nun die beiden Kontaktpunkte 11 und 12 voneinander getrennt. Der kleinste Abstand zwischen den stromführenden Kontakten 9,10 und der Kontaktachse 8 zu den Kontaktpunkten 11 und 12 ist der Abstand der Kontaktpunkte 9 und 11 resp. 10 und 12, da die Kontaktachse 8, wie in Fig. 1 ersichtlich, davon etwa gleich weit entfernt ist. Dieser Abstand wird bestimmt durch den vollen Kippwinkel der Kontaktwippe und dem Abstand der Bohrung 7 von der Wippenträgerachse 5′. Dieser Abstand kann nun durch diese erfindungsgemässe Anordnung leicht auf die minimal geforderten 3 mm eingestellt werden.Under the pawl spring 4, the contact rocker 5 is mounted by means of the rocker support axis 5 'tiltable in a corresponding storage in the housing part 1. A tilt spring 6, which is supported on the bottom of the housing part 1, holds the contact rocker 5 in one of the two tilt positions. The contact axis 8 held in the bore 7 of the contact rocker 5 is connected to two contact points 9 and 10 (contact point 10 in FIG. 1 covered by the contact rocker 5). The electrical connection is ensured by touching the contact axis 8 with the contact points 9 and 10 under the action of the spring force of the rocker spring 6. In the second tilt position, the two contact points 11 and 12 are now separated from one another. The smallest distance between the current-carrying contacts 9, 10 and the contact axis 8 to the contact points 11 and 12 is the distance between the contact points 9 and 11, respectively. 10 and 12, since the contact axis 8, as can be seen in FIG. 1, is approximately the same distance from it. This distance is determined by the full tilt angle of the contact rocker and the Distance of the bore 7 from the rocker support axis 5 '. This distance can now be easily adjusted to the minimum required 3 mm by this arrangement according to the invention.

Durch Betätigung der Drucktaste 2 stösst die Klinkenfeder 4, welche sich zuerst in Druckrichtung bewegt, auf die obere Kante der Kontaktwippe 5, welche in der Nähe der Wippenträgerachse 5′ nur leicht gerundet ist, und biegt sich in die Richtung der Kippstellung aus. In einem Abstand zur Wippenträgerachse 5′ weist die Oberkante der Kontaktwippe 5 ein zur Klinkenfeder 4 hin gerichtete Kante 13 resp. 13′ auf. Die nun gebogene Klinkenfeder 4 überträgt die Druckbewegung auf diese Kante 13, was ein Drehmoment entgegen der durch die Kippfeder 6 gehaltenen Kippstellung der Kontaktwippe 5 erzeugt und diesen in die zweite Kippstellung kippen lässt. Damit werden die beiden Kontaktpunkte 9 und 10 elektrisch voneinander getrennt und die Kontaktpunkte 11 und 12 elektrisch leitend über die Kontaktachse 8 verbunden. Dadurch, dass die Kontaktachse 8 vorzugsweise mit Spiel in der Bohrung 7 der Kontaktwippe 5 gehalten ist, kann sie sich beim Berühren der Kontaktpunkte 9,10 resp. 11,12 um die Längsachse drehen, da diese Berührungsbewegung aus der Kippbewegung heraus eine schleifende Berührung ist. Durch die Reibung wird dann die Drehung hervorgerufen.By pressing the push button 2, the pawl spring 4, which first moves in the pressure direction, on the upper edge of the contact rocker 5, which is only slightly rounded in the vicinity of the rocker support axis 5 ', and bends in the direction of the tilt position. At a distance from the rocker support axis 5 ', the upper edge of the contact rocker 5 has an edge 13 towards the pawl spring 4, respectively. 13 ′ on. The now curved pawl spring 4 transfers the pressure movement to this edge 13, which generates a torque counter to the tilt position of the contact rocker 5 held by the tilt spring 6 and causes it to tilt into the second tilt position. The two contact points 9 and 10 are thus electrically separated from one another and the contact points 11 and 12 are connected in an electrically conductive manner via the contact axis 8. The fact that the contact axis 8 is preferably held with play in the bore 7 of the contact rocker 5, it can when touching the contact points 9, 10 respectively. Rotate 11, 12 around the longitudinal axis because this touching movement is a sliding contact from the tilting movement. The rotation is then caused by the friction.

Dadurch, dass die Kontaktpunkte 9,10,11,12 vorzugsweise eine abgeschrägte Kante 9′,11′ aufweisen, wird die Kontaktachse 8 bei der Bewegung der Kontaktwippe 5 in eine Kippstellung über diese Kante 9′,11′ geführt, was zu einer Verstärkung der Drehbewegung der Kontaktachse 8 um ihre Längsachse führt, wie in Fig. 2 ersichtlich. Damit kommt der Kontakt nicht in jeweils jeder Kippstellung mit der gleichen Stelle der Kontaktachse 8 zustande, womit sich der Verschleiss durch die Kontaktbildung auf den gesamtem Umfang der Kontaktachse an der Berührungsstelle verteilt, was im Vergleich zu Kontaktpunkten, welche einander immer an derselben Stelle berühren, zu erheblich längeren Standzeiten der Kontakte führt.Because the contact points 9, 10, 11, 12 preferably have a beveled edge 9 ', 11', the contact axis 8 is guided when the contact rocker 5 moves into a tilted position over this edge 9 ', 11', which leads to reinforcement the rotational movement of the contact axis 8 about its longitudinal axis, as can be seen in FIG. 2. Thus, the contact does not occur in each tilt position with the same point on the contact axis 8, with which the wear is distributed over the entire circumference of the contact axis at the contact point due to the contact formation, which, compared to contact points that always touch each other in the same place, leads to considerably longer service life for the contacts.

Claims (4)

  1. Electrical push-button switch having at least one pivotably supported contact whip (5) which is selectively tiltable about a pivoting axis (5′) extending at right angles to said contact whip (5) from one into the other of two tilting positions by means of a push rod (4) movably held on the inner side of the push-button (2) and under the influence of a tilting spring (6) engaging the under side of the contact whip (5), wherein an electrically conductive contact axle (8) leads through a bore of the contact whip extending parallely staggered to said pivoting axis, said axle being in conductive contact with at least two separated contact points (9, 10) in each of said tilting positions, characterized in that said contact whip (5) is a body made of plastic material and said contact axle (8) leads with radial play through said cylindrical bore (7) and is supported therein exclusively by the wall of the bore, such that said contact axle (8), under the influence of external forces, e.g. upon abutting onto said contact points (9-12), can at each time rotate a small angle about its longitudinal axis.
  2. Electrical push-button switch according to claim 1, characterized in that said contact axle (8) is made of drawn wire of silver.
  3. Electrical push-button switch according to any of claims 1 to 2, characterized in that said bore is positioned at such a distance from the pivoting axis that there is formed an air gap of at least 3 mm between the contact axle (8) and the contact points (9, 10) not in contact therewith.
  4. Electrical push-button switch according to any of claims 1 to 3, characterized in that said push rod held on the inner side is formed by a jack spring (4).
EP19920101239 1991-03-26 1992-01-27 Push-button switch Expired - Lifetime EP0505682B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH911/91 1991-03-26
CH91191A CH682024A5 (en) 1991-03-26 1991-03-26

Publications (2)

Publication Number Publication Date
EP0505682A1 EP0505682A1 (en) 1992-09-30
EP0505682B1 true EP0505682B1 (en) 1995-06-14

Family

ID=4198044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920101239 Expired - Lifetime EP0505682B1 (en) 1991-03-26 1992-01-27 Push-button switch

Country Status (3)

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EP (1) EP0505682B1 (en)
CH (1) CH682024A5 (en)
DE (1) DE59202486D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239707C2 (en) * 1992-11-26 2003-07-31 Abb Patent Gmbh Electrical switching device
FR3078819B1 (en) 2018-03-08 2020-03-20 Legrand France SYNCHRONIZED OPERATION OF A BISTABLE DEVICE FROM A MULTITUDE OF MONOSTABLE CONTROLLERS
FR3078818B1 (en) 2018-03-08 2020-03-06 Legrand France BISTABLE DEVICE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526863A (en) * 1967-10-30 1970-09-01 Gen Electric Electromagnetic holding mechanism
GB1564706A (en) * 1975-12-08 1980-04-10 Arrow Hart Ltd Electric switch
CH647093A5 (en) * 1979-12-27 1984-12-28 Feller Ag Electrical push-button switch
EP0048552A1 (en) * 1980-09-10 1982-03-31 LUCAS INDUSTRIES public limited company Electrical switches with a simplified assembly sequence
DE3151501A1 (en) * 1981-12-24 1983-07-07 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Electrical push-button switch, especially for motor vehicles

Also Published As

Publication number Publication date
DE59202486D1 (en) 1995-07-20
EP0505682A1 (en) 1992-09-30
CH682024A5 (en) 1993-06-30

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