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EP0863525B1 - Electrical switchgear - Google Patents

Electrical switchgear Download PDF

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Publication number
EP0863525B1
EP0863525B1 EP98100759A EP98100759A EP0863525B1 EP 0863525 B1 EP0863525 B1 EP 0863525B1 EP 98100759 A EP98100759 A EP 98100759A EP 98100759 A EP98100759 A EP 98100759A EP 0863525 B1 EP0863525 B1 EP 0863525B1
Authority
EP
European Patent Office
Prior art keywords
contact
rocker
switching
cams
movement
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
EP98100759A
Other languages
German (de)
French (fr)
Other versions
EP0863525A3 (en
EP0863525A2 (en
Inventor
Frank M. Dipl.-Ing. Claus
Michael Dipl.-Ing. Knorr
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0863525A2 publication Critical patent/EP0863525A2/en
Publication of EP0863525A3 publication Critical patent/EP0863525A3/en
Application granted granted Critical
Publication of EP0863525B1 publication Critical patent/EP0863525B1/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
    • H01H23/00Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02Details
    • H01H23/12Movable parts; Contacts mounted thereon
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02Details
    • H01H23/12Movable parts; Contacts mounted thereon
    • H01H23/16Driving mechanisms
    • H01H23/20Driving mechanisms having snap action
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/307Means for extinguishing or preventing arc between current-carrying parts with slow break, e.g. for AC current waiting for a zero crossing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02Details
    • H01H23/12Movable parts; Contacts mounted thereon
    • H01H23/16Driving mechanisms
    • H01H23/166Driving mechanisms with positive action
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/32Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/52Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions
    • 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
    • H01H5/045Energy stored by deformation of elastic members making use of cooperating spring loaded wedging or camming parts between operating member and contact structure

Definitions

  • the invention relates to an electrical switching device, in particular an installation switching device, with at least one contact point made by at least one fixed contact and a movable contact is formed, which movable contact on a contact rocker is arranged, which is supported on a blade-shaped bearing contact and for switching operation cooperates with a rocker switch, which for actuation the contact rocker is provided with a spherical pressure piece.
  • Electrical switching devices especially those for domestic installation, are different Form and function as surface-mounted and flush-mounted devices for many years in practical use.
  • electrical contact arrangements arise when disconnecting the contacts, that is when lifting the movable contact piece from the fixed contact piece, electric arcs between the contact pieces, which cause the contact material to burn depending on the current strength and adversely affect the switching behavior of the electrical switching device impact.
  • Such a switching device is from the British patent GB921819 A known.
  • the rocker switch executes one when actuated on the contact rocker translatory movement in such a way that the rocker switch takes off early here short distance of the movable contact piece arranged on the contact rocker caused by the associated fixed contact piece, resulting in a shortened active arc time results.
  • the rocker switch has on their surface facing the contact rocker in the direction of movement on both sides of the spherical pressure piece molded cams that work with the contact rocker and here the pivoting movement of the contact rocker and thus its Check lifting off the fixed contact piece.
  • the molded on the rocker switch So cams serve just like the pressure piece mentioned at the outset to actuate the Contact rocker. It can advantageously be additionally provided that the contact rocker is provided with projections directed to the rocker switch, which with the the cams formed on the rocker switch.
  • the operation of the contact arrangement designed in this way is based on the fact that as already mentioned above, a first actuation of the contact rocker by means of of a first cam formed on the rocker switch takes place by the first Cams on the rocker switch, before that on the translationally moving At the end of the rocker switch, the pressure piece arranged the bearing point of the cutting edge bearing exceeds, thereby causing the lifting from the fixed contact piece.
  • the contact rocker While the pressure piece continues to move on the contact rocker and also during this exceeds the bearing point of the cutting edge bearing, so that the contact rocker releases from the first cam, the contact rocker arrives with a second cam, the seen in the direction of movement of the rocker switch on the back, that is behind the Pressure piece on which the rocker switch is molded.
  • This second cam ensures that the contact distance does not increase until the rocker switch reaches the end position. Only when the rocker switch is in its end position, i.e. its second rest position in the case of a bistable switch, the contact rocker disengages with the second cam on the rocker switch, so that the contact rocker opens and the sets the intended largest possible contact distance.
  • the rocker switch when actuated with the spherical pressure piece on the contact rocker from. Prevent when changing position beyond the cutting edge storage the molded cams on the rocker switch a further opening of the contact point, so that the contact rocker at a defined distance from the associated contact piece remains until the rocker switch has reached its end position.
  • the cams formed on the rocker switch pivot the contact rocker in collaboration with the pressure piece while the pressure piece is at its point of contact shifted on the contact rocker in the direction of movement and the associated one
  • cams act upon the contact rocker and thereby lifts the movable contact arranged on the contact rocker from the fixed contact.
  • the contact rocker bears against the assigned cam, as a result of which movable contact is kept at a short distance from the fixed contact and at If the bearing contact is exceeded by the pressure piece, the moving contact spontaneously occupies the full open position.
  • FIG. 1 is a partial sectional view of a contact arrangement 10 of a Switching device according to the invention in a first switching position, namely the first of two end positions, shown.
  • the contact arrangement 10 comprises a rocker switch 12, a contact rocker 14 with a movable contact piece 16 and arranged thereon two fixed contact pieces 18, 20, between which the contact rocker 14 can be pivoted is led and contacted them alternately.
  • the rocker switch 12 is pivotally mounted about a pivot point 13 and quasi arranged perpendicular to the contact rocker 14 acted upon by it.
  • the contact rocker 14 is in turn mounted on a cutting edge 22, which leads to a connection contact 24 belongs, which forms an electrical unit with the contact rocker 14.
  • a pressure piece 26 is provided, which is preferably one of a pressure spring loaded ball 26 is not shown here, the rolls when the switch is actuated on the contact rocker 14 and so the switching is virtually frictionless effected from the first end position into the second end position.
  • the rocker switch 12 is in its end region facing the contact rocker 14 with in Formations 28, 29 pointing in the direction of their pivoting movement, which harmonize with the shape of the contact rocker 14 and are compatible with it.
  • the Shape of the contact rocker 14 is provided according to the invention such that the area 30 of the contact rocker 14 acted upon by the pressure piece 26 of the rocker switch at its horizontally located ends each by a raised edge 32, 33 is limited, with the edge horizontal on one side, in the figures the left side is extended and receives the movable contact piece 24.
  • FIG. 1 shows the arrangement 10 according to the invention in the first End position in which both the rocker switch 12 and the contact rocker 14 a oblique position, that is, from the vertical or from the horizontal take a different position.
  • the essence of the inventive design of the contact arrangement 10 is in that the pivoting movement of the contact rocker 14 is not, as in conventional Switching devices usually takes place suddenly, but rather in stages or respectively delayed, so that the electrical to be switched here during a switching operation Currents by lifting the movable contact piece 16 either not at all an arc can occur or it extinguishes so quickly that it does not burn caused and so the contacts are protected.
  • the design according to the invention serves to solve this technical problem the rocker switch 12 with corresponding formations, at least in the direction of Pivotal movement are provided, but also, for example, as an annular bead on the front End can be formed. It is important that the contact rocker 14 is provided with a compatible shape, which with the molded parts work together on the rocker switch 12.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Tumbler Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Electric Motors In General (AREA)
  • Push-Button Switches (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electronic Switches (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Contacts (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The electrical apparatus has a rocker type switch that has a pair of fixed contacts (18, 20) between which the moving contacts (16) on a rocker carrier (14) are positioned. The rocker is moved by a toggle (12) that pivots about a point (13). The end of the toggle has formed lugs (28,29) and the lugs engage features on the rocker. A small translational movement is given to the rocker and results in a shortened active contact arcing period.

Description

Die Erfindung betrifft ein elektrisches Schaltgerät, insbesondere Installationsschaltgerät, mit wenigstens einer Kontaktstelle, die von wenigstens einem festen Kontakt und einem beweglichen Kontakt gebildet ist, welcher bewegliche Kontakt an einer Kontaktwippe angeordnet ist, die auf einem schneidenförmigen Lagerkontakt abgestützt ist und zur Schaltbetätigung mit einer Schaltwippe zusammenarbeitet, welche zur Betätigung der Kontaktwippe mit einem kugelförmigen Druckstück versehen ist.The invention relates to an electrical switching device, in particular an installation switching device, with at least one contact point made by at least one fixed contact and a movable contact is formed, which movable contact on a contact rocker is arranged, which is supported on a blade-shaped bearing contact and for switching operation cooperates with a rocker switch, which for actuation the contact rocker is provided with a spherical pressure piece.

Elektrische Schaltgeräte, insbesondere solche für die Hausinstallation, sind in unterschiedlicher Form und Funktion als Aufputz- und Unterputzgeräte seit vielen Jahren im praktischen Einsatz. Wie bei elektrischen Kontaktanordnungen bekannt, entstehen beim Trennen der Kontakte, das heißt beim Abheben des beweglichen Kontaktstückes vom festen Kontaktstück, elektrische Lichtbögen zwischen den Kontaktstücken, welche abhängig von der jeweiligen Stromstärke einen Abbrand des Kontaktmaterials verursachen und sich insoweit nachteilig auf das Schaltverhalten des elektrischen Schaltgerätes auswirken.Electrical switching devices, especially those for domestic installation, are different Form and function as surface-mounted and flush-mounted devices for many years in practical use. As is known with electrical contact arrangements, arise when disconnecting the contacts, that is when lifting the movable contact piece from the fixed contact piece, electric arcs between the contact pieces, which cause the contact material to burn depending on the current strength and adversely affect the switching behavior of the electrical switching device impact.

Ein solches Schaltgerät ist aus der britischen Patentschrift GB921819 A bekannt. Such a switching device is from the British patent GB921819 A known.

Es liegt daher im Interesse einer möglichst störungsfreien Schaltbetätigung, die Entstehung von Schaltlichtbögen wenn schon nicht zu eliminieren so doch zumindest soweit wie möglich zu begrenzen.It is therefore in the interest of switching operations to be as trouble-free as possible of switching arcs, if not to be eliminated, at least so far limit as possible.

Ausgehend von diesem Stand der Technik ist es daher Aufgabe der Erfindung, ein elektrisches Schaltgerät der eingangs genannten Art zu schaffen, bei welchem durch konstruktive Maßnahmen die aktive Lichtbogenzeit von Schaltlichtbögen möglichst begrenzt ist, wobei auf eine möglichst einfache Gestaltung geachtet werden soll.Starting from this prior art, it is therefore an object of the invention to: to create electrical switching device of the type mentioned, in which by constructive measures limit the active arc time of switching arcs as much as possible is, whereby attention should be paid to the simplest possible design.

Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruchs 1. Weitere vorteilhaften Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.This object is achieved by the characterizing features of the Claim 1. Further advantageous refinements and developments of the invention are marked in the subclaims.

Dementsprechend vollzieht die Schaltwippe bei Betätigung auf der Kontaktwippe eine translatorische Bewegung derart, daß die Schaltwippe hierbei ein frühes Abheben in geringem Abstand des an der Kontaktwippe angeordneten beweglichen Kontaktstückes vom zugeordneten festen Kontaktstück bewirkt, woraus eine verkürzte aktive Lichtbogenzeit resultiert.Accordingly, the rocker switch executes one when actuated on the contact rocker translatory movement in such a way that the rocker switch takes off early here short distance of the movable contact piece arranged on the contact rocker caused by the associated fixed contact piece, resulting in a shortened active arc time results.

Mit anderen Worten, das der Kontaktwippe zugewandte Ende der Schaltwippe gleitet oder rollt entlang einer Geraden auf der Kontaktwippe, die, wie eingangs beschrieben, in einer Schneidenlagerung gelagert ist, wobei die Schaltwippe unmittelbar nach Verlassen ihrer Ruheposition eine Kontakttrennung des beweglichen vom festen Kontakt herbeiführt. Diese Kontakttrennung erfolgt hierbei erfindungsgemäß mit mäßiger Geschwindigkeit und nur auf kurze Distanz.In other words, the end of the switching rocker facing the contact rocker slides or rolls along a straight line on the contact rocker, which, as described at the beginning, is stored in a cutting edge bearing, the rocker switch immediately after leaving their rest position a contact separation of the movable from the fixed contact causes. This contact separation takes place according to the invention at a moderate speed and only at a short distance.

Hierdurch wird entgegen den herkömmlichen Erwartungen erreicht, daß die leitende Verbindung zwischen den Kontaktstücken zwar unterbrochen ist, daß jedoch andererseits der Kontaktabstand zu gering ist, als daß ein Lichtbogen entstehen beziehungsweise längere Zeit anstehen kann, so daß ein an sich möglicher Lichtbogen eine sehr kurze Brenndauer aufweist und damit die aktive Lichtbogenzeit gegenüber herkömmlichen Gestaltungen von Schaltgeräten erheblich verkürzt ist. In this way, contrary to conventional expectations, it is achieved that the manager Connection between the contact pieces is broken, but on the other hand the contact distance is too small to cause an arc or can be pending for a long time, so that a possible arc is a very has a short burning time and thus the active arc time compared to conventional ones Switchgear designs are significantly shortened.

Entsprechend einer bevorzugten Ausführungsform der Erfindung weist die Schaltwippe an ihrer der Kontaktwippe zugewandten Fläche in Bewegungsrichtung beiderseits des kugelförmigen Druckstücks angeformte Nocken auf, die mit der Kontaktwippe zusammenarbeiten und hierbei die Schwenkbewegung der Kontaktwippe und damit deren Abheben vom festen Kontaktstück kontrollieren. Die an der Schaltwippe angeformten Nocken dienen also ebenso wie das eingangs erwähnte Druckstück der Betätigung der Kontaktwippe. Dabei kann vorteilhafterweise zusätzlich vorgesehen sein, daß die Kontaktwippe mit zur Schaltwippe gerichteten Vorsprüngen versehen ist, welche mit den an der Schaltwippe angeformten Nocken zusammenarbeiten.According to a preferred embodiment of the invention, the rocker switch has on their surface facing the contact rocker in the direction of movement on both sides of the spherical pressure piece molded cams that work with the contact rocker and here the pivoting movement of the contact rocker and thus its Check lifting off the fixed contact piece. The molded on the rocker switch So cams serve just like the pressure piece mentioned at the outset to actuate the Contact rocker. It can advantageously be additionally provided that the contact rocker is provided with projections directed to the rocker switch, which with the the cams formed on the rocker switch.

Die Arbeitsweise der in dieser Art ausgebildeten Kontaktanordnung beruht darauf, daß, wie vorstehend bereits angesprochen, eine erste Betätigung der Kontaktwippe mittels eines ersten an der Schaltwippe angeformten Nocken erfolgt, indem sich der erste Nocken an die Schaltwippe anlegt, bevor das an dem sich translatorisch bewegenden Ende der Schaltwippe angeordnete Druckstück den Lagerpunkt der Schneidenlagerung überschreitet, und hierdurch das Abheben vom festen Kontaktstück bewirkt.The operation of the contact arrangement designed in this way is based on the fact that as already mentioned above, a first actuation of the contact rocker by means of of a first cam formed on the rocker switch takes place by the first Cams on the rocker switch, before that on the translationally moving At the end of the rocker switch, the pressure piece arranged the bearing point of the cutting edge bearing exceeds, thereby causing the lifting from the fixed contact piece.

Während das Druckstück sich auf der Kontaktwippe weiter bewegt und hierbei auch den Lagerpunkt der Schneidenlagerung überschreitet, so daß sich die Kontaktwippe von dem ersten Nocken löst, gelangt die Kontaktwippe mit einem zweiten Nocken, der in Bewegungsrichtung der Schaltwippe gesehen rückseitig, das heißt hinter dem Druckstück, an der Schaltwippe angeformt ist. Dieser zweite Nocken stellt sicher, daß sich der Kontaktabstand bis zum Erreichen der Endstellung der Schaltwippe nicht vergrößert. Erst wenn die Schaltwippe ihre Endstellung, das heißt ihre zweite Ruheposition im Falle eines bistabilen Schalters, erreicht hat, gelangt die Kontaktwippe außer Eingriff mit dem zweiten Nocken an der Schaltwippe, so daß die Kontaktwippe öffnet und den vorgesehenen größtmöglichen Kontaktabstand einstellt.While the pressure piece continues to move on the contact rocker and also during this exceeds the bearing point of the cutting edge bearing, so that the contact rocker releases from the first cam, the contact rocker arrives with a second cam, the seen in the direction of movement of the rocker switch on the back, that is behind the Pressure piece on which the rocker switch is molded. This second cam ensures that the contact distance does not increase until the rocker switch reaches the end position. Only when the rocker switch is in its end position, i.e. its second rest position in the case of a bistable switch, the contact rocker disengages with the second cam on the rocker switch, so that the contact rocker opens and the sets the intended largest possible contact distance.

Im Hinblick auf die vorstehend erläuterte bestimmungsgemäße Funktion erweist es sich als zweckmäßig, daß der von dem Druckstück beaufschlagte Bereich der Kontaktwippe eben ausgebildet ist und mittig auf dem Lagerkontakt aufliegt. With regard to the intended function explained above, it proves to be as expedient that the area of the contact rocker acted upon by the pressure piece is flat and is centered on the bearing contact.

Entsprechend der möglichen Ausgestaltung mit einem kugelförmigen Druckstück rollt die Schaltwippe bei Betätigung mit dem kugelförmigen Druckstück auf der Kontaktwippe ab. Dabei verhindern bei Lageveränderung nach jenseits der Schneidenlagerung die an der Schaltwippe angeformten Nocken ein weiteres Öffnen der Kontaktstelle, so daß die Kontaktwippe in einem definierten Abstand zum zugeordneten Kontaktstück verharrt, bis die Schaltwippe ihre Endstellung erreicht hat.Corresponds to the possible configuration with a spherical pressure piece the rocker switch when actuated with the spherical pressure piece on the contact rocker from. Prevent when changing position beyond the cutting edge storage the molded cams on the rocker switch a further opening of the contact point, so that the contact rocker at a defined distance from the associated contact piece remains until the rocker switch has reached its end position.

Gemäß der Erfindung sind auf einfache und zuverlässige Weise mittels der geometrischen Form und des Ortes der angeformten Nocken die Schaltzeit, die Lage der Schaltzeitpunkte, die Schaltgeschwindigkeit und deren zeitlicher Verlauf einstellbar.According to the invention are simple and reliable by means of the geometric Shape and location of the molded cams, the switching time, the location of the Switching times, the switching speed and its time course can be set.

Die an der Schaltwippe angeformten Nocken verschwenken nämlich die Kontaktwippe in Zusammenarbeit mit dem Druckstück, während das Druckstück seinen Auflagepunkt auf der Kontaktwippe in Bewegungsrichtung verlagert und hierbei der zugeordnete Nocken infolge seiner Verschwenkung die Kontaktwippe beaufschlagt und hierdurch den an der Kontaktwippe angeordneten beweglichen Kontakt vom festen Kontakt abhebt. Hierbei liegt die Kontaktwippe am zugeordneten Nocken an, infolgedessen der bewegliche Kontakt in geringem Abstand zum festen Kontakt gehalten ist und bei Überschreiten des Lagerkontakts durch das Druckstück der bewegliche Kontakt spontan die volle Öffnungsstellung einnimmt.The cams formed on the rocker switch pivot the contact rocker in collaboration with the pressure piece while the pressure piece is at its point of contact shifted on the contact rocker in the direction of movement and the associated one As a result of its pivoting, cams act upon the contact rocker and thereby lifts the movable contact arranged on the contact rocker from the fixed contact. Here, the contact rocker bears against the assigned cam, as a result of which movable contact is kept at a short distance from the fixed contact and at If the bearing contact is exceeded by the pressure piece, the moving contact spontaneously occupies the full open position.

Diese und weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind Gegenstand der Unteransprüche.These and other advantageous refinements and improvements of the invention are the subject of the subclaims.

Anhand eines in der schematischen Zeichnung dargestellten Ausführungsbeispiels sollen die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen sowie besondere Vorteile der Erfindung näher erläutert und beschrieben werden.Using an exemplary embodiment shown in the schematic drawing the invention, advantageous refinements and improvements and special Advantages of the invention are explained and described in more detail.

Es zeigen

Fig. 1
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines erfindungsgemäßen Schaltgeräts in einer ersten Schaltstellung;
Fig. 2
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines er findungsgemäßen Schaltgeräts in einer zweiten Schaltstellung;
Fig. 3
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines erfindungsgemäßen Schaltgeräts in einer dritten Schaltstellung;
Fig. 4
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines erfindungsgemäßen Schaltgeräts in einer vierten Schaltstellung;
Fig. 5
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines erfindungsgemäßen Schaltgeräts in einer fünften Schaltstellung
   und
Fig. 6
eine auszugsweise Schnittdarstellung einer Kontaktanordnung eines erfindungsgemäßen Schaltgeräts in einer sechsten Schaltstellung.
Show it
Fig. 1
a partial sectional view of a contact arrangement of a switching device according to the invention in a first switching position;
Fig. 2
a partial sectional view of a contact arrangement of a switching device according to the invention in a second switching position;
Fig. 3
a partial sectional view of a contact arrangement of a switching device according to the invention in a third switching position;
Fig. 4
a partial sectional view of a contact arrangement of a switching device according to the invention in a fourth switching position;
Fig. 5
a partial sectional view of a contact arrangement of a switching device according to the invention in a fifth switching position
and
Fig. 6
a partial sectional view of a contact arrangement of a switching device according to the invention in a sixth switching position.

In Fig. 1 ist eine auszugsweise Schnittdarstellung einer Kontaktanordnung 10 eines erfindungsgemäßen Schaltgeräts in einer ersten Schaltstellung, nämlich der ersten von zwei Endstellungen, gezeigt. Die Kontaktanordnung 10 umfaßt eine Schaltwippe 12, eine Kontaktwippe 14 mit einem daran angeordneten beweglichen Kontaktstück 16 und zwei festen Kontaktstücken 18, 20, zwischen denen die Kontaktwippe 14 verschwenkbar geführt ist und diese wechselweise kontaktiert.1 is a partial sectional view of a contact arrangement 10 of a Switching device according to the invention in a first switching position, namely the first of two end positions, shown. The contact arrangement 10 comprises a rocker switch 12, a contact rocker 14 with a movable contact piece 16 and arranged thereon two fixed contact pieces 18, 20, between which the contact rocker 14 can be pivoted is led and contacted them alternately.

Die Schaltwippe 12 ist schwenkbar um einen Schwenkpunkt 13 gelagert und quasi senkrecht zu der von ihr beaufschlagten Kontaktwippe 14 angeordnet. Die Kontaktwippe 14 ist ihrerseits auf einer Schneide 22 gelagert, welche zu einem Anschlußkontakt 24 gehört, welcher mit der Kontaktwippe 14 eine elektrische Einheit bildet. Zu deren Beaufschlagung ist an der der Kontaktwippe 14 zugewandten Stirnseite 25 der Schaltwippe 12 ein Druckstück 26 vorgesehen, welches vorzugsweise von einer von einer hier nicht näher gezeigten Druckfeder beaufschlagten Kugel 26 gebildet ist, die bei Schaltbetätigung auf der Kontaktwippe 14 abrollt und so quasi reibungsfrei die Umschaltung von der ersten Endstellung in die zweite Endstellung bewirkt. The rocker switch 12 is pivotally mounted about a pivot point 13 and quasi arranged perpendicular to the contact rocker 14 acted upon by it. The contact rocker 14 is in turn mounted on a cutting edge 22, which leads to a connection contact 24 belongs, which forms an electrical unit with the contact rocker 14. To theirs The application is on the end face 25 facing the contact rocker 14 Switch rocker 12 a pressure piece 26 is provided, which is preferably one of a pressure spring loaded ball 26 is not shown here, the rolls when the switch is actuated on the contact rocker 14 and so the switching is virtually frictionless effected from the first end position into the second end position.

Die Schaltwippe 12 ist in ihrem der Kontaktwippe 14 zugewandten Endbereich mit in Richtung ihrer Schwenkbewegung weisenden Anformungen 28, 29 versehen, welche mit der Formgebung der Kontaktwippe 14 harmonieren und hierzu kompatibel sind. Die Formgebung der Kontaktwippe 14 ist gemäß der Erfindung derart vorgesehen, daß der von dem Druckstück 26 der Schaltwippe beaufschlagte Bereich 30 der Kontaktwippe 14 an seinen horizontal befindlichen Enden jeweils von einem hochgezogenen Rand 32, 33 begrenzt ist, wobei an einer Seite, in den Figuren die linke Seite, der Rand horizontal verlängert ist und das bewegliche Kontaktstück 24 aufnimmt.The rocker switch 12 is in its end region facing the contact rocker 14 with in Formations 28, 29 pointing in the direction of their pivoting movement, which harmonize with the shape of the contact rocker 14 and are compatible with it. The Shape of the contact rocker 14 is provided according to the invention such that the area 30 of the contact rocker 14 acted upon by the pressure piece 26 of the rocker switch at its horizontally located ends each by a raised edge 32, 33 is limited, with the edge horizontal on one side, in the figures the left side is extended and receives the movable contact piece 24.

Die Wirkungsweise dieser besonderen Anformungen 28, 29 sowie 32, 33 wird nachfolgend anhand der den Bewegungsablauf der Schaltwippe 12 und der Kontaktwippe 14 zeigenden Fig. 1 bis 6 erläutert.The mode of operation of these special projections 28, 29 and 32, 33 is as follows based on the sequence of movements of the rocker switch 12 and the contact rocker 14 1 to 6 are shown.

Wie bereits erwähnt zeigt die Fig. 1 die erfindungsgemäße Anordnung 10 in der ersten Endstellung, in welcher sowohl die Schaltwippe 12 als auch die Kontaktwippe 14 eine schräge Position, das heißt von der Vertikalen beziehungsweise von der Horizontalen abweichende Stellung einnehmen.As already mentioned, FIG. 1 shows the arrangement 10 according to the invention in the first End position in which both the rocker switch 12 and the contact rocker 14 a oblique position, that is, from the vertical or from the horizontal take a different position.

In Fig. 2 ist die Schaltwippe aus ihrer in Fig. 1 gezeigten schrägen End- oder Ruhestellung in die vertikale Position verschwenkt. Hierbei befindet sich das Druckstück mit seinem Zenit noch vor der Schneide 22, wobei der dem beweglichen Kontaktstück abgewandte Rand 33 der Kontaktwippe 14 mit der auf dieser Seite befindlichen Anformung 29 an der Schaltwippe 12 anliegt. Diese Abstützung sorgt jedoch dafür, daß hierdurch die Kontaktwippe 14 vom festen Kontakt 20 abhebt und entsprechend den vorliegenden Hebelbedingungen ein definierter Abstand des beweglichen Kontaktstücks 16 zu dem festen Kontaktstück 20 eingehalten wird.In Fig. 2 the rocker switch is from its oblique end or rest position shown in Fig. 1 pivoted into the vertical position. Here is the pressure piece with his Zenith before the cutting edge 22, the one facing away from the movable contact piece Edge 33 of the contact rocker 14 with the molding located on this side 29 abuts the rocker switch 12. However, this support ensures that this the contact rocker 14 lifts off the fixed contact 20 and in accordance with the present Lever conditions a defined distance of the movable contact piece 16 to the fixed contact piece 20 is observed.

In Fig. 3 ist die Schwenkbewegung weitergeführt, und der Auflagepunkt des Druckstücks 26 befindet sich jenseits der Schneidenlagerung 22, das heißt, aufgrund der nun vorliegenden Hebelbedingungen erfolgt eine Beaufschlagung der Kontaktwippe 14 jenseits der Abstützung an der Schneide 22, so daß die Kontaktwippe 14 weiter schwenkt und sich das an der gegenüberliegenden Seite der Kontaktwippe angebrachte bewegliche Kontaktstück 16 weiter von dem unteren festen Kontaktstück 20 entfernt, bis schließlich, wie in Fig. 4 gezeigt, die zweite Endstellung der Schaltanordnung 10 erreicht ist, in welcher das bewegliche Kontaktstück 16 am oberen festen Kontaktstück 18 anliegt.In Fig. 3, the pivoting movement is continued, and the point of contact of the pressure piece 26 is located beyond the cutting edge bearing 22, that is, due to the now existing lever conditions, the contact rocker 14 is applied beyond the support on the cutting edge 22 so that the contact rocker 14 pivots further and the movable one attached to the opposite side of the contact rocker Contact piece 16 further away from the lower fixed contact piece 20 until finally, as shown in FIG. 4, the second end position of the switching arrangement 10 is reached in which the movable contact piece 16 on the upper fixed contact piece 18th is applied.

In den Fig. 5 und 6 ist der entsprechende Bewegungsablauf der Schaltwippe 12 und der Kontaktwippe 14 beim erneuten Umschalten gezeigt, das heißt entsprechend den in Fig. 2 und 3 gezeigten Zwischenstellungen bei erneuter Betätigung der Schaltwippe 12, wodurch schließlich die in Fig. 1 gezeigte Schaltstellung eingenommen wird.5 and 6 is the corresponding sequence of movements of the rocker switch 12 and the contact rocker 14 shown when switching again, that is, according to the 2 and 3 intermediate positions shown when the rocker switch is actuated again 12, as a result of which the switching position shown in FIG. 1 is finally assumed.

Das Wesentliche an der erfindungsgemäßen Gestaltung der Kontaktanordnung 10 besteht darin, daß die Schwenkbewegung der Kontaktwippe 14 nicht, wie bei herkömmlichen Schaltgeräten üblich sprungartig erfolgt, sondern quasi in Stufen beziehungsweise verzögert, so daß bei einem Schaltvorgang der hier zu schaltenden elektrischen Ströme durch das Abheben des beweglichen Kontaktstücks 16 entweder gar nicht erst ein Lichtbogen entstehen kann oder dieser so schnell erlischt, daß er keinen Abbrand verursacht und so die Kontakte geschont werden.The essence of the inventive design of the contact arrangement 10 is in that the pivoting movement of the contact rocker 14 is not, as in conventional Switching devices usually takes place suddenly, but rather in stages or respectively delayed, so that the electrical to be switched here during a switching operation Currents by lifting the movable contact piece 16 either not at all an arc can occur or it extinguishes so quickly that it does not burn caused and so the contacts are protected.

Für die Lösung dieses technischen Problems dient die erfindungsgemäße Gestaltung der Schaltwippe 12 mit entsprechenden Anformungen, die zumindest in Richtung der Schwenkbewegung vorgesehen sind, aber auch beispielsweise als Ringwulst am stirnseitigen Ende ausgebildet sein können. Hierbei ist von Bedeutung, daß die Kontaktwippe 14 mit einer hierzu kompatiblen Formgebung versehen ist, welche mit den Anformungen an der Schaltwippe 12 zusammenarbeiten.The design according to the invention serves to solve this technical problem the rocker switch 12 with corresponding formations, at least in the direction of Pivotal movement are provided, but also, for example, as an annular bead on the front End can be formed. It is important that the contact rocker 14 is provided with a compatible shape, which with the molded parts work together on the rocker switch 12.

Claims (2)

  1. An electrical switchgear, especially an accessory, with at least one contact point (10) which is formed by at least one fixed contact (18, 20) and a movable contact (16), which movable contact (16) is arranged on a contact rocker (14) which rests on a bearing (22) with a terminal contact (24) and cooperates with a switching rocker (12) for switching actuation, which rocker is provided with a spherical thrust element (26) for actuating the contact rocker (14), with the switching rocker (12), when actuated, rolling off on the contact rocker (14) with the spherical thrust element (26) and thus performing a translatory movement, with the switching rocker (12) thus producing a lift-off of the movable contact (16) from the associated fixed contact (18, 20), which movable contact is arranged on the contact rocker (14), with the bearing being arranged as a knife-edge bearing (22) and with the switching rocker (12) comprising cams (28, 29) shaped in the direction of movement on either side of the spherical thrust element (26) at its end facing the contact rocker (14), which cams cooperate with the contact rocker (14) and thus control the swiveling movement of the contact rocker (14) and thus its lift-off from the fixed contact (18, 20), with the contact rocker (14) being provided with projections (32, 33) facing the switching rocker (12) which cooperate with the cams (28, 29) formed on the switching rocker (12), with the switching time, the position of the switching times, the switching speed and their progress over time being adjustable by means of the geometric shape and location of the formed cams (28, 29), with the contact rocker (14) remaining at a defined distance to the associated fixed contact (18, 20) until the switching rocker (12) is swiveled to the other side of the knife-edge bearing (22), with the swiveling movement of the contact rocker (14) occurring in steps, so that during a switching process by the lift-off of the movable contact (16) an arc will not be produced or the same will extinguish so rapidly that it does not cause any consumption, characterized in that when the switching rocker (12) with the cams (28, 29) formed thereon is swiveled and the spherical thrust element (26) displaces its resting point on the contact rocker (14) in the direction of movement, the associated cam (28, 29) will pressurize the contact rocker (14) as a result of its swiveling and will thus lift off from the fixed contact (18, 20) the movable contact (16) which is arranged on the contact rocker (14).
  2. An electric switchgear as claimed in claim 1, characterized in that the region of the contact rocker (14) which is pressurized by the spherical thrust element (26) is provided with a plane arrangement and rests in the middle on the knife-edge bearing (22).
EP98100759A 1997-02-27 1998-01-17 Electrical switchgear Expired - Lifetime EP0863525B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19707835 1997-02-27
DE19707835A DE19707835A1 (en) 1997-02-27 1997-02-27 Electrical switching device

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EP0863525A2 EP0863525A2 (en) 1998-09-09
EP0863525A3 EP0863525A3 (en) 1999-01-20
EP0863525B1 true EP0863525B1 (en) 2004-05-19

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EP98100759A Expired - Lifetime EP0863525B1 (en) 1997-02-27 1998-01-17 Electrical switchgear

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EP (1) EP0863525B1 (en)
AT (1) ATE267455T1 (en)
CZ (1) CZ55398A3 (en)
DE (2) DE19707835A1 (en)
NO (1) NO980806L (en)
PL (1) PL325041A1 (en)
RU (1) RU98103799A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101159194B (en) * 2006-10-05 2010-06-09 勒格朗法国公司 A safe electric switch
CN107658154A (en) * 2017-10-18 2018-02-02 罗格朗(北京)电气有限公司 For switching device movable contact spring and there is its switching device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR168200A0 (en) * 2000-11-24 2000-12-21 University Of South Australia Electrical switch with switching bridge
DE102006044055B4 (en) * 2006-09-20 2009-04-09 Abb Ag Electrical switching device with at least one contact point
EP2267740A1 (en) * 2009-06-25 2010-12-29 Abb Ag Control unit of an installation switch
WO2014154286A1 (en) 2013-03-28 2014-10-02 Abb Technology Ltd A knife switch, a switching device comprising a knife switch and a switchgear

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US2725438A (en) * 1952-09-15 1955-11-29 Arrow Hart & Hegeman Electric Alternating current switch mechanism
GB921819A (en) * 1960-10-28 1963-03-27 Crabtree & Co Ltd J A Improvements in rocker-operated electric switches
FR1489702A (en) * 1962-12-26 1967-07-28 Device for reducing contact wear in alternating current switching devices
NZ218566A (en) * 1986-12-09 1990-12-21 Pdl Holdings Ltd Slow break, fast make rocker activated switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101159194B (en) * 2006-10-05 2010-06-09 勒格朗法国公司 A safe electric switch
CN107658154A (en) * 2017-10-18 2018-02-02 罗格朗(北京)电气有限公司 For switching device movable contact spring and there is its switching device
CN107658154B (en) * 2017-10-18 2020-09-15 Tcl-罗格朗国际电工(惠州)有限公司 Movable contact spring for switch device and switch device with movable contact spring

Also Published As

Publication number Publication date
NO980806L (en) 1998-08-28
EP0863525A3 (en) 1999-01-20
CZ55398A3 (en) 1998-12-16
RU98103799A (en) 1999-12-27
PL325041A1 (en) 1998-08-31
DE19707835A1 (en) 1998-09-03
DE59811407D1 (en) 2004-06-24
NO980806D0 (en) 1998-02-26
EP0863525A2 (en) 1998-09-09
ATE267455T1 (en) 2004-06-15

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