EP0173193B1 - Electrical switch - Google Patents

Electrical switch Download PDF

Info

Publication number
EP0173193B1
EP0173193B1 EP85110326A EP85110326A EP0173193B1 EP 0173193 B1 EP0173193 B1 EP 0173193B1 EP 85110326 A EP85110326 A EP 85110326A EP 85110326 A EP85110326 A EP 85110326A EP 0173193 B1 EP0173193 B1 EP 0173193B1
Authority
EP
European Patent Office
Prior art keywords
contact
pressure spring
contact arm
contact pressure
arm
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
EP85110326A
Other languages
German (de)
French (fr)
Other versions
EP0173193A3 (en
EP0173193A2 (en
Inventor
Erwin Ing. Grad. Muders
Rudolf Sellner
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
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 Asea Brown Boveri AG Germany filed Critical Asea Brown Boveri AG Germany
Priority to AT85110326T priority Critical patent/ATE53696T1/en
Publication of EP0173193A2 publication Critical patent/EP0173193A2/en
Publication of EP0173193A3 publication Critical patent/EP0173193A3/en
Application granted granted Critical
Publication of EP0173193B1 publication Critical patent/EP0173193B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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

Definitions

  • the invention relates to an electrical switch according to the preamble of claim 1.
  • a contact arrangement for a low-voltage switch with a contact arm and a contact pressure spring designed as a torsion spring has become known from DE-U-19 09 358.
  • the object of the invention is to make the contact spring simpler and to make the holder or the connection to the movable contact arm easier.
  • the end of at least one tab is cage-like bent inwards, whereby the coil spring is at least partially covered. This forms a stop for the coil spring.
  • the effect of these stops is as follows: after the unlatching has taken place and the contact lever has traveled a certain distance, the leg coil spring is relaxed and it engages one or two stops. The force and the friction on the switching pin are thus eliminated or at least considerably reduced and the contact lever can continue to rotate freely under the action of a contact opening spring or an impact armature.
  • At least one of the limb ends of the compression spring on g, e-arc is so that the leg ends do not contact lever in the caulk.
  • the geometry of the design should be chosen so that the bearing point of the lever opposite the contact piece, the bearing point of the leg end that is not bent up, and the central axis of the switching pin lie on one line.
  • grooves can be provided in the contact lever, which serve to guide the leg ends.
  • FIG. 1 shows an electrical low-voltage switch with a contact bridge 10, on which two movable contact pieces 11 and 12 are formed, which come into connection with two fixed contact pieces 13 and 14, whereby the two fixed contact pieces 13 and 14 are connected by means of the contact bridge 10.
  • two tabs 15 and 16 are formed on both sides of the contact bridge 10 approximately in the middle thereof, each having an elongated hole 17 and 18 extending up to the contact bridge 10. The two elongated holes 17 and 18 are aligned with one another.
  • switching pin 19 also called switching rod 19.
  • a contact pressure spring 20 which is designed as a torsion spring, the two ends 21 and 22 of which are elongated and, as can be seen from FIG. 1, form an obtuse angle alpha with one another.
  • the ends of the legs 21 and 22 lie in one plane and in the position indicated in FIGS. 1 and 2 directly on the upper surface of the contact bridge.
  • the arrangement is such that the distance A, the switching rod or the central axis of the switching rod 19 from the upper surface of the contact bridge 10 is always smaller than the extension of the V-shape formed by the two legs 21 and 22 in a relaxed manner State in the direction transverse or perpendicular to the central axis of the switching rod 19. This ensures that the switching rod 19 presses the two leg ends 21 and 22 continuously against the contact bridge 10, the switching rod 19 with a surface area facing the contact bridge on the inside of the contact pressure spring 20th is present.
  • a slot 23 is provided for guiding the shift rod 19.
  • FIGS. 3 and 4 shows a contact lever arrangement in which the movable contact arm is designed as a contact lever 30 supported on one side, a movable contact piece 31 is formed on one end and the other end of the contact arm 30 is supported on a stationary bearing element 32.
  • the fixed contact piece bears the reference number 33.
  • the support at point 32 that is to say at support point 32, can also be a latching point.
  • the support point 32 is attached to a ratchet lever 34 which is articulated or rotatable about a fixed axis 35.
  • Support point 32 is actually designed as a latching point.
  • the geometry of the arrangement is selected so that the connecting lines between the support 32, the support point of the leg 21 and the center of the switching pin 19 form a straight line, i.e. that the three points are aligned. It is thereby achieved that the end of the leg 22 only slides, which can be supported by the fact that this end 22a, as indicated in Fig. 7, is bent.
  • the contact pressure spring is the same as that according to FIGS. 1 and 2 and for this reason it also bears the reference numbers 20, 21 and 22.
  • the distance of the central axis of the switching rod 19 from the contact lever 30 is denoted by b.
  • the torsion spring 20 or contact pressure spring 20 generates the contact pressure force, which is divided into the actual contact force P, and the contact force or latching force P 2 .
  • the arrangement has, in the same way as that of FIG. 2, two tabs 36 and 37, which are provided with elongated holes 38 and 39, through which the shift rod 19 extends.
  • the ends of the two tabs 36 and 37 additionally have an angled portion 40 and 41 inward, so that a cage is formed by the tabs 36 and 37 with the angled portions 40 and 41.
  • the distance of the surface line M, which lies on the side of the torsion spring or contact pressure spring 20 opposite the two legs 21 and 22, from the inner surface of the bends 41 and 42 is d. This dimension is chosen so that after a contact opening (see in Figures. And 6) the turns of the contact pressure spring abut against the tabs 40 and 41 (see Figures 5 and 6).
  • the distance b naturally increases and becomes b "because the relaxation of the legs 21 and 22 pushes the contact lever 30 away from the switching rod 19.
  • the surface line M lies against the stops 40 and 41, so that the Relaxation movement of the legs 21 and 22 is limited and thereby the switching rod 19 is released from the inner surfaces of the windings of the contact pressure spring 20.
  • a gap c is obtained between the inner surface of the windings of the contact pressure spring 20 and the outer surface of the switching rod 19, as a result of which the friction between the switching rod 19 and the windings of the contact pressure spring 20.
  • the force with which the contact lever is brought into the switch-off position is brought about by a switch-off spring 42.
  • FIGS. 7 and 8 show another Ausge Organization of the invention. This is essentially the same arrangement as that according to FIGS. 3 and 4 or 5 and 6, only a difference being present in that two tabs 71 and 72 are formed on the contact lever 70, of which only one Tab 71 has an angle 73.
  • the relaxation path of only the two turns 74 and 75 is thereby limited, whereas the turns 76, 77 and 78 can deform freely.
  • the two turns 74 and 75 are located at a distance c from the shift rod 19, the turn 76 also still at a, albeit reduced, distance from the shift rod 19, whereas the two turns 77 and 78 are in the lower region, i.e. where the both legs 21 and 22 lie, have already laid against the shift rod 19.
  • the friction between the contact pressure spring 20 and the switching rod 19 is increased slightly and in doses, which can be very desirable for assembly reasons.
  • the contact arrangement can be used not only on contact bridge switches, but also on contact lever switches.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Relay Circuits (AREA)
  • Lock And Its Accessories (AREA)
  • Air Bags (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

1. Electrical switch, in particular low-voltage switch having at least one fixed contact piece (13, 14) and at least one movable contact piece (11, 12) mounted on a contact arm (10), which contact piece is pressed against the fixed contact piece (13, 14; 33) by means of a contact pressure spring which acts on the contact arm (10), is constructed as a torsion spring with at least one winding, the ends (21, 22) of which are elongated in opposite directions and form an obtuse angle with one another in the released state and which contact pressure spring is arranged with its central axis transverse to the contact arm (10, 30, 70), the tangentially elongated ends (21, 22) of the contact pressure spring crossing one another and resting against the contact arm surface and the contact pressure spring (20) being assigned to the contact arm (10, 30, 70) in such a way that the obtuse angle (alpha) is open towards the contact arm, characterized in that the contact pressure spring (20) is arranged between two tabs (36, 37; 71, 72) formed onto the contact arm (10...) on both sides, and in that the tabs and the contact pressure spring are penetrated by a switching spigot (19) running transversely to the contact arm so that the tabs guide the contact pressure spring in relation to the switching spigot and the contact arm.

Description

Die Erfindung betrifft einen elektrischen Schalter gemäß dem Oberbegriff des Anspruches 1.The invention relates to an electrical switch according to the preamble of claim 1.

Es gibt eine Reihe Ausführungen von Schaltern mit Kontakthebeln oder Kontaktbrücken, bei denen der Kontaktdruck auf unterschiedliche Weise erzeugt wird. Aus der DE-OS 15 63 781 ist ein Leitungsschutzschalter bekanntgeworden, bei dem in einer Ausführung der Kontaktdruck mittels einer an einem den Betätigungshebel und den Kontakthebel miteinander kuppelnden Schaltstößel angeordneten Schraubendruckfeder erzeugt wird. Bei einer anderen Ausführung in der gleichen DE-OS 15 63 781 ist eine Schenkelfeder vorgesehen, die um die Drehachse des Kontakthebels herumgeschlungen ist und den Kontaktdruck erzeugt. Diese Feder dient gleichzeitig auch als Ausschaltfeder, mit der der Kontakthebei in die Ausschaltstellung verbracht wird.There are a number of designs of switches with contact levers or contact bridges in which the contact pressure is generated in different ways. From DE-OS 15 63 781 a circuit breaker has become known, in which in one embodiment the contact pressure is generated by means of a helical compression spring arranged on a switching plunger coupling the actuating lever and the contact lever. In another embodiment in the same DE-OS 15 63 781 a leg spring is provided which is wrapped around the axis of rotation of the contact lever and generates the contact pressure. This spring also serves as a switch-off spring with which the contact lift is brought into the switch-off position.

Aus der DE-AS 11 23 029 ist ein Kleinselbstschalter bekanntgeworden, bei dem zwischen dem Schaltstößel (Griff) und dem Kontakthebel eine Blattfeder angeordnet ist, die den Kontaktdruck erzeugt.From DE-AS 11 23 029 a small auto switch has become known, in which a leaf spring is arranged between the switching plunger (handle) and the contact lever, which generates the contact pressure.

Aus der DE-PS 10 30 916 ist bekannt, den Kontakthebel selbstfedernd auszubilden, um den Kontaktdruck zu erzeugen.From DE-PS 10 30 916 it is known to design the contact lever to be self-resilient in order to generate the contact pressure.

Aus der DE-OS 14 63 384 ist bekannt, am Kontakthebel ein federndes Zwischenstück anzuformen, mit dem der Kontaktdruck erzeugt werden kann. Das bewegliche Kontaktstück ist dann an dem federnden Zwischenhebel befestigt.From DE-OS 14 63 384 it is known to form a resilient intermediate piece on the contact lever with which the contact pressure can be generated. The movable contact piece is then attached to the resilient intermediate lever.

Eine Kontaktanordnung für einen Niederspannungsschalter mit einem Kontaktarm und einer als Drefeder ausgebildeten Kontaktdruckfeder ist aus dem DE-U-19 09 358 bekanntgeworden. Dort dient zur Führung der Kontaktdruckfeder und des Kontakthebels eine spezielles Gehäuse, das mit dem Schaltzapfen bzw. der Schalterwelle verbunden ist und praktisch ein Teil mit diesem bildet.A contact arrangement for a low-voltage switch with a contact arm and a contact pressure spring designed as a torsion spring has become known from DE-U-19 09 358. There is a special housing for guiding the contact pressure spring and the contact lever, which is connected to the switching pin or the switch shaft and practically forms a part with it.

Bei allen Ausführungen besteht das Problem, daß das Anbringen von Schraubenoder Blattfedern platz- und materiafaufwendig ist. Bei Blattfedern bzw. bei Federungen, die einer Blattfeder in ihrer Wirkung gleichkommen, ergibt sich außerdem noch als Nachteil, daß beim Schließvorgang die Kontaktkraft von Null aus nur langsam, d.h. linear mit der Stößelbewegung aufgebaut wird, weil keine Vorspannung vorhanden ist. Es sind dies die Ausführungen nach der DE-OS 14 63 384 bzw. der DE-PS 10 30 916. Ähnlich ist dabei auch die Blattfeder nach der DE-AS 11 23 029. Die Druckfeder nach der DE-OS 15 63 781 hat den Nachteil, daß der Stößel zweigeteilt werden muß, was ebenfalls einen erhöhten Aufwand mit sich bringt.The problem with all versions is that the installation of screw or leaf springs is space and material consuming. In the case of leaf springs or suspensions which have the same effect as a leaf spring, there is also the disadvantage that the contact force from zero is only slow, i.e. is built up linearly with the ram movement because there is no preload. These are the designs according to DE-OS 14 63 384 or DE-PS 10 30 916. The leaf spring according to DE-AS 11 23 029 is similar. The compression spring according to DE-OS 15 63 781 has the Disadvantage that the plunger must be divided into two, which also entails increased effort.

Aufgabe der Erfindung ist es, die Kontaktfeder einfacher auszubilden und die Halterung bzw. die Verbindung mit dem bewegbaren Kontaktarm einfacher zu gestalten.The object of the invention is to make the contact spring simpler and to make the holder or the connection to the movable contact arm easier.

Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruches 1.This object is achieved according to the invention by the characterizing features of claim 1.

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

Eine derartige Ausbildung ist einfach und gleichzeitig wird auch sichergestellt, daß ein Anfangskontaktdruck durch eine Vorspannung vorhanden ist. Ein gewisses Problem besteht aber darin, daß bei Konstruktionen mit Kontakthebel eine relativ große Reibung zwischen dem Kontakthebel und dem Schaltzapfen vorhanden ist, weil die Federwindungen und insbesondere die freien Enden der Feder dauernd unter der Federspannung an dem Schaltzapfen anliegen. Insbesondere ist die Reibung zwischen den Schenkel- bzw. Drahtenden und dem Kontaktarm relativ hoch wegen der dort vorhandenen geringen Auflagefläche.Such a design is simple and at the same time it is also ensured that an initial contact pressure is present due to a preload. There is a certain problem, however, that in constructions with a contact lever there is a relatively large amount of friction between the contact lever and the switching pin, because the spring windings and in particular the free ends of the spring constantly bear against the switching pin under the spring tension. In particular, the friction between the leg or wire ends and the contact arm is relatively high because of the small contact surface there.

Der Reibungswiderstand gegen die Schwenkung des Kontakthebels nach Auslösung, also beim Auslösevorgang des Schalters, ist dann relativ groß, was die Kontaktöffnung hemmt und verzögert. Um dies zu vermeiden, wird gemäß kennzeichnendem Teil des Anspruches 3 das Ende wenigstens eines Lappens käfigartig nach innen gebogen, wodurch die Schraubenfeder zumindest teilweise überdeckt wird. Hierdurch wird für die Schraubenfeder ein Anschlag gebildet. Die Wirkung dieser Anschläge ist folgende: nachdem die Entklinkung erfolgt ist und der Kontakthebel einen gewissen Weg zurückgelegt hat, wird die Schenkel-Schraubenfeder entspannt und sie legt sich an einem oder zwei Anschlägen an. Damit ist die Kraftwirkung und die Reibung an dem Schaltzapfen aufgehoben oder zumindest erheblich vermindert und der Kontakthebel kann sich weiter frei unter der Wirkung einer Kontaktöffnungsfeder bzw. eines Schlagankers drehen. Es gibt nun auch Fälle, bei denen beispielsweise aus montagetechnischen Gründen eine geringe Reibung zwischen dem Kontakthebel und dem Schaltzapfen erwünscht ist. In einem solchen Falle wird erfindungsgemäß nur ein Lappen käfigartig nach innen umgebogen und zwar in beliebig wählbarer Länge. Die Feder kommt dann je nach Ausbildung und Länge der Umbiegung bzw. des Anschlages nur mit einer vorbestimmten Anzahl von Windungen an der Achse zum Anliegen.The frictional resistance against the pivoting of the contact lever after tripping, ie when the switch is tripped, is then relatively large, which inhibits and delays the contact opening. To avoid this, according to the characterizing part of claim 3, the end of at least one tab is cage-like bent inwards, whereby the coil spring is at least partially covered. This forms a stop for the coil spring. The effect of these stops is as follows: after the unlatching has taken place and the contact lever has traveled a certain distance, the leg coil spring is relaxed and it engages one or two stops. The force and the friction on the switching pin are thus eliminated or at least considerably reduced and the contact lever can continue to rotate freely under the action of a contact opening spring or an impact armature. There are also cases in which, for example, for assembly reasons, low friction between the contact lever and the switching pin is desired. In such a case, according to the invention, only one flap is bent inwards in the manner of a cage and in any length that can be selected. Depending on the design and length of the bend or of the stop, the spring then only bears against the axis with a predetermined number of turns.

Wesentlich ist darüberhinaus, daß wenigstens eines der Schenkelenden der Druckfeder aufge-bogen ist, damit sich die Schenkelenden nicht im Kontakthebel verstemmen. Insbesondere dann, wenn nur das Schenkelende, das dem Kontaktstück benachbart ist, aufgebogen ist, ist eine vorteilhafte Wirkung zu erzielen, da dann nur das aufgebogene Ende auf dem Kontakthebel gleitet. Um diesen Effekt noch zu unterstützen, sollte die Geometrie der Ausführung so gewählt werden, daß der dem Kontaktstück entgegengesetzt liegende Lagerpunkt des Hebels, die Auflagerstelle des nicht aufgebogenen Schenkelendes und die Mittelachse des Schaltzapfens auf einer Linie liegen. Zweckmäßigerweise können im Kontakthebel Nuten vorgesehen sein, die zur Führung der Schenkelenden dienen., Is also essential that at least one of the limb ends of the compression spring on g, e-arc is so that the leg ends do not contact lever in the caulk. In particular, if only the leg end, which is adjacent to the contact piece, is bent up, an advantageous effect can be achieved since then only the bent end slides on the contact lever. To further support this effect, the geometry of the design should be chosen so that the bearing point of the lever opposite the contact piece, the bearing point of the leg end that is not bent up, and the central axis of the switching pin lie on one line. Appropriately, grooves can be provided in the contact lever, which serve to guide the leg ends.

Anhand der Zeichnung, in der einige Ausführungsbeispiele der Erfindung dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen näher erläutert und beschrieben werden.Based on the drawing, in which some exec tion examples of the invention are shown, the invention and further advantageous embodiments and improvements are to be explained and described in more detail.

Es zeigt:

  • Fig. 1 eine Seitenansicht auf eine Kontaktbrükkenanordnung mit einer Schraubenfeder, gemäß Schnittlinie I-I der Fig. 2,
  • Fig. 2 eine Schnittansicht gemäß Schnittlinie II-11 der Fig 1,
  • Fig. 3 eine weitere Kontaktanordnung gemäß Schnittlinie III-III der Fig. 4 und
  • Fig. 4 eine Schnittansicht gemäß der Schnittlinie IV-IV der Fig. 3,
  • Fig. 5/6 zwei Schnittansichten der Ausführungen gemäß den Figuren 3 und 4 im ausgeschalteten Zustand, wobei die Ansichten ähnlich denjenigen der Figuren 1 und 2 bzw. 3 und 4 sind und
  • Fig. 7/8 eine weitere Ausgestaltung der Erfindung in Ausschaltstellung, in ähnlicher Darstellung wie diejenige der Figuren 5 und 6.
It shows:
  • 1 is a side view of a contact bridge arrangement with a helical spring, according to section line II of FIG. 2,
  • 2 is a sectional view taken along section line II-11 of FIG. 1,
  • Fig. 3 shows a further contact arrangement according to section line III-III of Fig. 4 and
  • 4 is a sectional view along the section line IV-IV of FIG. 3,
  • 5/6 show two sectional views of the embodiments according to FIGS. 3 and 4 in the switched-off state, the views being similar to that of FIGS. 1 and 2 or 3 and 4 and
  • 7/8 a further embodiment of the invention in the switched-off position, in a similar representation to that of FIGS. 5 and 6.

Die Figur 1 zeigt einen elektrischen Niederspannungsschalter mit einer Kontaktbrücke 10, an der zwei bewegbare Kontaktstücke 11 und 12 angeformt sind, die mit zwei Festkontaktstücken 13 und 14 miteinander in Verbindung gelangen, wodurch die beiden Festkontaktstücke 13 und 14 mittels der Kontaktbrücke 10 verbunden ist. Wie aus Figur 2 ersichtlich ist, sind an der Kontaktbrücke 10 annähernd in deren Mitte beidseitig zwei Lappen 15 und 16 angeformt, die jeweils ein bis zur Kontaktbrücke 10 verlaufendes Langloch 17 und 18 aufweisen. Die beiden Langlöcher 17 und 18 fluchten miteinander.1 shows an electrical low-voltage switch with a contact bridge 10, on which two movable contact pieces 11 and 12 are formed, which come into connection with two fixed contact pieces 13 and 14, whereby the two fixed contact pieces 13 and 14 are connected by means of the contact bridge 10. As can be seen from FIG. 2, two tabs 15 and 16 are formed on both sides of the contact bridge 10 approximately in the middle thereof, each having an elongated hole 17 and 18 extending up to the contact bridge 10. The two elongated holes 17 and 18 are aligned with one another.

Sie sind von einem Schaltzapfen 19, auch Schaltstange 19 genannt, durchgriffen.They are penetrated by a switching pin 19, also called switching rod 19.

Zwischen den beiden Lappen 15 und 16 befindet sich eine Kontaktdruckfeder 20, die als Drehfeder ausgebildet ist, deren beide Enden 21 und 22 verlängert sind und, wie aus Figur 1 ersichtlich ist, einen stumpfen Winkel alpha miteinander bilden. Die Enden der Schenkel 21 und 22 liegen in einer Ebene und in der Fig. 1 bzw. 2 angedeuteten Stellung direkt auf der oberen Fläche der Kontaktbrücke auf. Die Anordnung ist so bemessen, daß der Abstand A, der Schaltstange bzw. der Mittelachse der Schaltstange 19 von der oberen Fläche der Kontaktbrücke 10 in jedem Falle immer kleiner ist als die Erstreckung der durch die beiden Schenkel 21 und 22 gebildeten V-Form in entspanntem Zustand in Richtung quer bzw. senkrecht zu der Mittelachse der Schaltstange 19. Dadurch wird erreicht, daß die Schaltstange 19 die beiden Schenkelenden 21 und 22 dauernd gegen die Kontaktbrücke 10 andrückt, wobei die Schaltstange 19 mit einem der Kontaktbrücke zugewandten Oberflächenbereich am Inneren der Kontaktdruckfeder 20 anliegt.Between the two tabs 15 and 16 there is a contact pressure spring 20 which is designed as a torsion spring, the two ends 21 and 22 of which are elongated and, as can be seen from FIG. 1, form an obtuse angle alpha with one another. The ends of the legs 21 and 22 lie in one plane and in the position indicated in FIGS. 1 and 2 directly on the upper surface of the contact bridge. The arrangement is such that the distance A, the switching rod or the central axis of the switching rod 19 from the upper surface of the contact bridge 10 is always smaller than the extension of the V-shape formed by the two legs 21 and 22 in a relaxed manner State in the direction transverse or perpendicular to the central axis of the switching rod 19. This ensures that the switching rod 19 presses the two leg ends 21 and 22 continuously against the contact bridge 10, the switching rod 19 with a surface area facing the contact bridge on the inside of the contact pressure spring 20th is present.

Zur Führung der Schaltstange 19 ist ein Schlitz 23 vorgesehen.A slot 23 is provided for guiding the shift rod 19.

Die Ausführung gemäß Figuren 3 und 4 zeigt eine Kontakthebelanordnung, bei der der bewegbare Kontaktarm als einseitig aufgelagerter Kontakthebel 30 ausgebildet ist, an dessen einem Ende ein bewegbares Kontaktstück 31 angeformt ist und mit dessen anderem Ende der Kontaktarm 30 an einem ortsfesten Lagerelement 32 aufgelagert ist. Das feste Kontaktstück trägt die Bezugsziffer 33. Die Auflagerung an der Stelle 32, also an der Auflagestelle 32 kann auch eine Verklinkungsstelle sein. Zu diesem Zweck ist die Auflagestelle 32 an einem Klinkenhebel 34 angebracht, der um eine ortsfeste Achse 35 gelenkig bzw. drehbar gelagert ist. In den Figuren 3 bis 8 ist die. Auflagestelle 32 tatsächlich als Verklinkungsstelle ausgebildet. Es besteht natürlich auch die Möglichkeit, an dieser Stelle ein Drehlager vorzusehen. Hierbei ist die Geometrie der Anordnung so gewählt, daß die Verbindungslinien zwischen dem Auflager 32, dem Auflagepunkt des Schenkels 21 und dem Mittelpunkt des Schaltzapfens 19 eine gerade Linie bildet, d.h. daß die drei Punkte fluchten. Dadurch wird erreicht, daß das Ende des Schenkels 22 nur gleitet, was dadurch noch unterstützt werden kann, daß dieses Ende 22a, wie in Fig. 7 angedeutet, aufgebogen ist.The embodiment according to FIGS. 3 and 4 shows a contact lever arrangement in which the movable contact arm is designed as a contact lever 30 supported on one side, a movable contact piece 31 is formed on one end and the other end of the contact arm 30 is supported on a stationary bearing element 32. The fixed contact piece bears the reference number 33. The support at point 32, that is to say at support point 32, can also be a latching point. For this purpose, the support point 32 is attached to a ratchet lever 34 which is articulated or rotatable about a fixed axis 35. In Figures 3 to 8 is the. Support point 32 is actually designed as a latching point. Of course, there is also the possibility of providing a pivot bearing at this point. Here, the geometry of the arrangement is selected so that the connecting lines between the support 32, the support point of the leg 21 and the center of the switching pin 19 form a straight line, i.e. that the three points are aligned. It is thereby achieved that the end of the leg 22 only slides, which can be supported by the fact that this end 22a, as indicated in Fig. 7, is bent.

Die Kontaktdruckfeder ist die gleiche wie die gemäß den Figuren 1 und 2 und sie trägt aus diesem Grunde auch die Bezugsziffer 20, 21 und 22. Der Abstand der Mittelachse der Schaltstange 19 von dem Kontakthebel 30 ist mit b bezeichnet. Die Drehfeder 20 bzw. Kontaktdruckfeder 20 erzeugt die Kontaktdruckkraft, die sich aufteilt in die eigentliche Kontaktkraft P, und die Auflagekraft bzw. Verklinkungskraft P2.The contact pressure spring is the same as that according to FIGS. 1 and 2 and for this reason it also bears the reference numbers 20, 21 and 22. The distance of the central axis of the switching rod 19 from the contact lever 30 is denoted by b. The torsion spring 20 or contact pressure spring 20 generates the contact pressure force, which is divided into the actual contact force P, and the contact force or latching force P 2 .

Die Anordnung besitzt in gleicher Weise wie die der Figur 2 zwei Lappen 36 und 37, die mit Langlöchern 38 und 39 versehen sind, durch die die Schaltstange 19 hindurchgreift. Die Enden der beiden Lappen 36 und 37 besitzen aber zusätzlich eine Abwinkelung 40 bzw. 41 nach innen, so daß durch die Lappen 36 und 37 mit den Abwinkelungen 40 und 41 ein Käfig gebildet ist. Der Abstand der Mantellinie M, die auf der den beiden Schenkeln 21 und 22 gegenüberliegenden Seite der Drehfeder bzw. Kontaktdruckfeder 20 liegt, von der Innenfläche der Abwinkelungen 41 und 42 beträgt d. Dieses Maß ist so gewählt, daß nach einer Kontaktöffnung (siehe in Figuren. und 6) die Windungen der Kontaktdruckfeder gegen die Lappen 40 und 41 anschlagen (siehe Figuren 5 und 6). Im ausgeschalteten Zustand vergrößert sich naturgemäß der Abstand b und wird zu b" weil durch die Entspannung der Schenkel 21 und 22 der Kontakthebel 30 von der Schaltstange 19 weggedrückt wird. Allerdings legt sich die Mantellinie M an die Anschläge 40 und 41 an, so daß die Entspannungebewegung der Schenkel 21 und 22 begrenzt ist und dadurch kommt die Schaltstange 19 von den Innenflächen der Windungen der Kontaktdruckfeder 20 frei. Man erhält zwischen der Innenfläche der Windungen der Kontaktdruckfeder 20 und der Außenfläche der Schaltstange 19 einen Spalt c, wodurch die Reibung zwischen der Schaltstange 19 und den Windungen der Kontaktdruckfeder 20 aufgehoben ist. Die Kraft, mit der der Kontakthebel in die Ausschaltstellung verbracht wird, wird durch eine Ausschaltfeder 42 bewirkt.The arrangement has, in the same way as that of FIG. 2, two tabs 36 and 37, which are provided with elongated holes 38 and 39, through which the shift rod 19 extends. However, the ends of the two tabs 36 and 37 additionally have an angled portion 40 and 41 inward, so that a cage is formed by the tabs 36 and 37 with the angled portions 40 and 41. The distance of the surface line M, which lies on the side of the torsion spring or contact pressure spring 20 opposite the two legs 21 and 22, from the inner surface of the bends 41 and 42 is d. This dimension is chosen so that after a contact opening (see in Figures. And 6) the turns of the contact pressure spring abut against the tabs 40 and 41 (see Figures 5 and 6). In the switched-off state, the distance b naturally increases and becomes b "because the relaxation of the legs 21 and 22 pushes the contact lever 30 away from the switching rod 19. However, the surface line M lies against the stops 40 and 41, so that the Relaxation movement of the legs 21 and 22 is limited and thereby the switching rod 19 is released from the inner surfaces of the windings of the contact pressure spring 20. A gap c is obtained between the inner surface of the windings of the contact pressure spring 20 and the outer surface of the switching rod 19, as a result of which the friction between the switching rod 19 and the windings of the contact pressure spring 20. The force with which the contact lever is brought into the switch-off position is brought about by a switch-off spring 42.

Die Figuren 7 und 8 zeigen eine weitere Ausgestaltung der Erfindung. Es handelt sich hierbei um im wesentlichen die gleiche Anordnung wie diejenige gemäß den Figuren 3 und 4 bzw. 5 und 6, wobei lediglich insoweit ein Unterschied vorhanden ist, als an dem Kontakthebel 70 zwei Lappen 71 und 72 angeformt sind, von denen lediglich der eine Lappen 71 eine Abwinkelung 73 aufweist. Dadurch wird, wie man aus der Figur 8 erkennen kann, der Entspannungsweg lediglich der beiden Windungen 74 und 75 begrenzt, wogegen die Windungen 76, 77 und 78 sich frei verformen können. Die beiden Windungen 74 und 75 befinden sich in einem Abstand cvon der Schaltstange 19, wobei die Windung 76 ebenfalls noch in einem, wenn auch verringertem Abstand zu der Schaltstange 19 verläuft, wogegen die beiden Windungen 77 und 78 im unteren Bereich, also dort wo die beiden Schenkel 21 und 22 liegen, sich gegen die Schaltstange 19 schon angelegt haben. Dadurch wird die Reibung zwischen der Kontaktdruckfeder 20 und der Schaltstange 19 geringfügig und dosiert erhöht, was aus montagetechnischen Gründen sehr wohl gewünscht sein kann.Figures 7 and 8 show another Ausge Organization of the invention. This is essentially the same arrangement as that according to FIGS. 3 and 4 or 5 and 6, only a difference being present in that two tabs 71 and 72 are formed on the contact lever 70, of which only one Tab 71 has an angle 73. As can be seen from FIG. 8, the relaxation path of only the two turns 74 and 75 is thereby limited, whereas the turns 76, 77 and 78 can deform freely. The two turns 74 and 75 are located at a distance c from the shift rod 19, the turn 76 also still at a, albeit reduced, distance from the shift rod 19, whereas the two turns 77 and 78 are in the lower region, i.e. where the both legs 21 and 22 lie, have already laid against the shift rod 19. As a result, the friction between the contact pressure spring 20 and the switching rod 19 is increased slightly and in doses, which can be very desirable for assembly reasons.

Die Kontaktanordnung ist, wie aus den Figuren 1 und 2 bzw. 3 und 4 ersichtlich ist, nicht nur auf Kontaktbrückenschalter, sondern auch auf Kontakthebelschalter anwendbar.As can be seen from FIGS. 1 and 2 or 3 and 4, the contact arrangement can be used not only on contact bridge switches, but also on contact lever switches.

In Figur 7 ist ersichtlich, daß die Schenkel 21 und 22 an ihren Enden Aufbiegungen 21a, 22a aufweisen und in Nuten 30a, 30b am Kontakthebel 30 geführt sind. Erforderlich wäre nur die Aufbiegung 22a, da, wie oben angedeutet, nur der Schenkel 22 auf dem Kontakthebel 30 gleitet.In Figure 7 it can be seen that the legs 21 and 22 have bends 21a, 22a at their ends and are guided in grooves 30a, 30b on the contact lever 30. Only the bend 22a would be required, since, as indicated above, only the leg 22 slides on the contact lever 30.

Die käfigartige Ausführung mit den Lappen 15, 16 und Anschlägen 40, 41 führt dazu, daß Kontakthebel und Druckfeder eine vormontierbare Einheit bilden.The cage-like design with the tabs 15, 16 and stops 40, 41 leads to the fact that the contact lever and compression spring form a preassembled unit.

Claims (7)

1. Electrical switch, in particular low-voltage switch having at least one fixed contact piece (13, 14) and at least one movable contact piece (11, 12) mounted on a contact arm (10), which contact piece is pressed against the fixed contact piece (1.3, 14; 33) by means of a contact pressure spring which acts on the contact arm (10), is constructed as a torsion spring with at least one winding, the ends (21, 22) of which are elongated in opposite directions and form an obtuse angle with one another in the released state and which contact pressure spring is arranged with its central axis transverse to the contact arm (10, 30, 70), the tangentially elongated ends (21, 22) of the contact pressure spring crossing one another and resting against the contact arm surface and the contact pressure spring (20) being assigned to the contact arm (10, 30, 70) in such a way that the obtuse angle (a) is open towards the contact arm, characterized in that the contact pressure spring (20) is arranged between two tabs (36, 37; 71, 72) formed onto the contact arm (10...) on both sides, and in that the tabs and the contact pressure spring are penetrated by a switching spigot (19) running transversely to the contact arm so that the tabs guide the contact pressure spring in relation to the switching spigot and the contact arm.
2. Switch according to Claim 1, characterized in that the end of at least one tab (15, 16; 36,37; 71, 72) is bent inwards forming a bend (40, 41; 73) and at least partially covers the contact pressure spring.
3. Switch according to Claim 2, characterized in that the distance of the bends (40,41; 73) from the contact lever (30, 70) is selected in such a way that the switching rod (19) becomes free, at least in the switched-off state, of those windings (74, 75), in which the windings (74, 75) rest against the bends (40, 41, 43).
4. Switch according to one of Claims 1 to 3, having a rotatable contact lever, characterized in that at least the leg end (22) adjacent to the movable contact piece (31) has an upward bend (22a) which reduces the friction between the contact lever (30) and the leg end (22).
5. Switch according to one of the previous claims, characterized in that the bearing point (32), possibly serving as latching point, of the contact lever (30) at the end at a distance from the contact piece (31), the bearing point (32) of the leg end (21) and the central point of the switching spigot (19) lie approximately on one line.
6. Switch according to one of the preceding Claims, characterized in that at least the leg end (22) adjacent to the movable contact piece (31) is guided in a groove (30b) on the contact lever (30).
7. Switch according to one of Claims 4 to 6, characterized in that the switching spigot (19) is guided in an elongated hole (23) which follows an arc of a circle with its central point at the bearing point (32) of the contact lever (30).
EP85110326A 1984-08-29 1985-08-19 Electrical switch Expired - Lifetime EP0173193B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110326T ATE53696T1 (en) 1984-08-29 1985-08-19 ELECTRICAL SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843431664 DE3431664A1 (en) 1984-08-29 1984-08-29 Electrical switch
DE3431664 1984-08-29

Publications (3)

Publication Number Publication Date
EP0173193A2 EP0173193A2 (en) 1986-03-05
EP0173193A3 EP0173193A3 (en) 1987-09-16
EP0173193B1 true EP0173193B1 (en) 1990-06-13

Family

ID=6244136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110326A Expired - Lifetime EP0173193B1 (en) 1984-08-29 1985-08-19 Electrical switch

Country Status (3)

Country Link
EP (1) EP0173193B1 (en)
AT (1) ATE53696T1 (en)
DE (2) DE3431664A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106653A1 (en) * 1991-03-02 1992-09-03 Abb Patent Gmbh CONTACT ARRANGEMENT
DE4117120A1 (en) * 1991-05-25 1992-11-26 Abb Patent Gmbh Contact arrangement for electrical pushbutton switch - incorporates contact holder imparting turning force to spring leaf contact wiping switch contacts together

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071198B (en) * 1959-12-17
DD8909A (en) *
US1312208A (en) * 1919-08-05 Ebectkic-cxjrcirit makeitt autb bxraker
DE822273C (en) * 1949-11-11 1951-11-26 Elektrotechnische Spezialfabri Electrical switch or self switch
DE957411C (en) * 1951-06-08 1957-01-31 Licentia Gmbh Contact arrangement for electrical switches and contactors
NL170062C (en) * 1951-06-08 Tokyo Shibaura Electric Co PREPARATION DEVICE FOR A CHARACTER RECOGNITION SYSTEM.
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
DE1202879B (en) * 1957-04-24 1965-10-14 Licentia Gmbh Electrical switchgear with U-shaped, bridging contact bracket
DE1105968B (en) * 1960-04-14 1961-05-04 Continental Elektro Ind Ag Switching device for electrical switches
DE1909358U (en) * 1964-11-11 1965-02-04 Stotz Kontakt Gmbh SWITCH WITH A HOLDING DEVICE ON THE CONTACT CARRIER FOR A CONTACT FINGER WORKING TOGETHER WITH A CONTACT PRESSURE SPRING.
DE2248029A1 (en) * 1972-09-29 1974-04-11 Siemens Ag CARRIER FOR THE MOVING CONTACTS OF A SWITCHING DEVICE

Also Published As

Publication number Publication date
ATE53696T1 (en) 1990-06-15
DE3431664A1 (en) 1986-03-20
EP0173193A3 (en) 1987-09-16
EP0173193A2 (en) 1986-03-05
DE3578259D1 (en) 1990-07-19

Similar Documents

Publication Publication Date Title
DE102007040163A1 (en) Switching device with a switching shaft for mounting a rotary contact bridge and multi-pole switching device arrangement
EP0203515B1 (en) Electromagnetic relay
EP0199668B1 (en) Current limiting switch unit with a contact bridge assembly
DE3327675C3 (en) Switching chamber for cam switches
DE2033089C3 (en) Electrical switch component with snap action
DE19836754A1 (en) Shaft unit for low power switch
EP0173193B1 (en) Electrical switch
EP0496213A1 (en) Circuit breaker, in particular circuit breaker with fuse
DE3150210C2 (en) Electrical snap switch
DE10056816A1 (en) Contact set for current-limiting protection switch has rotatable switch shaft with rotary contact bridge acted on by adjustable contact force springs
DE3439469C2 (en)
DE3906786C2 (en)
WO2000033339A2 (en) Energy accumulator for a step switch
DE2541922B2 (en) Lockable push button switch
CH668465A5 (en) A SHUT-OFF DEVICE WITH ACTUATOR, IN PARTICULAR FOR VALVES.
DE3323861C2 (en)
WO2002065494A1 (en) Switching contact arrangement
DE3513803C2 (en)
EP1630837B1 (en) Contact system
DE2805182C2 (en) Adjustment device for the release of an electrical switchgear
EP0502394B1 (en) Contact configuration
DE2547278A1 (en) ELECTRIC SNAP SWITCH
DE4308539B4 (en) Device for transmitting the movement of a bimetallic element
EP0158241B1 (en) Electrical switch
DE19527045C2 (en) Contact arrangement for an electrical switching device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19880202

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ASEA BROWN BOVERI AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19891115

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 53696

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3578259

Country of ref document: DE

Date of ref document: 19900719

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910625

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910701

Year of fee payment: 7

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920831

Ref country code: CH

Effective date: 19920831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010619

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010628

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010720

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010816

Year of fee payment: 17

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020831

BERE Be: lapsed

Owner name: *ASEA BROWN BOVERI A.G.

Effective date: 20020831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030301

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST