EP0358039B1 - Electromagnetic switch device - Google Patents

Electromagnetic switch device Download PDF

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Publication number
EP0358039B1
EP0358039B1 EP89115487A EP89115487A EP0358039B1 EP 0358039 B1 EP0358039 B1 EP 0358039B1 EP 89115487 A EP89115487 A EP 89115487A EP 89115487 A EP89115487 A EP 89115487A EP 0358039 B1 EP0358039 B1 EP 0358039B1
Authority
EP
European Patent Office
Prior art keywords
plate spring
magnet armature
leaf spring
switching device
formations
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
EP89115487A
Other languages
German (de)
French (fr)
Other versions
EP0358039A2 (en
EP0358039A3 (en
Inventor
Georg Streich
Günter Gnahn
Kurt Held
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0358039A2 publication Critical patent/EP0358039A2/en
Publication of EP0358039A3 publication Critical patent/EP0358039A3/en
Application granted granted Critical
Publication of EP0358039B1 publication Critical patent/EP0358039B1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
    • H01H50/646—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection intermediate part being a blade spring

Definitions

  • the invention relates to an electromagnetic switching device with a device for connecting the magnet armature to its contact carrier, wherein the magnet armature is penetrated in the region of the side facing away from the pole faces by a leaf spring, the ends of which protrude from the magnet armature engage in opposing grooves on the contact carrier.
  • the range of motion of the armature is limited by a crossbeam located below the leaf spring, ie the leaf spring can only be brought into the extended position. If the crossbeam is removed from such a device, the leaf spring can bend further, but it experiences a change in the support points when the leaf spring rests on the edges of the passage, so that the spring characteristic of the leaf spring changes suddenly.
  • the invention is therefore based on the object of creating a switching device of the type mentioned above, in which the spring characteristic is retained with the greatest possible travel of the magnet armature.
  • the leaf spring is provided on its central part lying in the penetration area with a protrusion which extends in the form of a roller in the counter-spring direction of the magnet armature and which extends with the roller longitudinal axis transverse to the leaf spring longitudinal axis.
  • the ends of the leaf spring engaging in the grooves on the side of the leaf spring opposite the first cylindrical shape have further, parallel to the first, have cylindrical shapes.
  • the leaf spring is provided with an extension 11 which, as shown in FIG. 2, is equipped with a slot 12.
  • Claw-shaped projections 14 are present on the arms 13 formed by the slot 12, which hook on the walls of a corresponding recess 15 in the contact carrier after insertion.
  • the leaf spring does not come into contact in its extended position on the wall 9, so that there is no change in the spring support points. It does not come to rest immediately in the extended position on the edges of the lower walls of the grooves 6, which would also cause a change in the support points of the leaf spring, but it can be relatively far beyond the extended position of the leaf spring, depending on the design of the formations bend, which allows a relatively long path of the armature 2.
  • the lower walls of the grooves 6, as shown in FIG. 1, are set back as far as possible or omitted from the magnet armature 2 in the direction of the formations 10.
  • the leaf spring can be made correspondingly stiff, so that such a deflection only takes place if the contact carrier, for example in the case of welded contacts, is retained.
  • the formations need not necessarily be cylindrical. A substantially identical effect is also achieved with prisms or dome-shaped shapes.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dc Machiner (AREA)
  • Electromagnets (AREA)
  • Push-Button Switches (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Electronic Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Vehicle Body Suspensions (AREA)
  • Contacts (AREA)

Abstract

An electromagnetic switching device includes a mechanism to couple the magnet armature with its contact carrier. A plate spring is provided with cylindrical formations in its mid-section as well as on its opposite ends so that the plate spring can bend beyond its elongated state. This prevents the spring tension from being altered by contact with the ends of the opening of the magnet armature and the ends of the supporting slots.

Description

Die Erfindung bezieht sich auf ein elektromagnetisches Schaltgerät mit einer Vorrichtung zur Verbindung des Magnetankers mit dessen Kontaktträger, wobei der Magnetanker im Bereich der den Polflächen abgewandten Seite von einer Blattfeder durchgriffen ist, deren aus dem Magnetanker herausragende Enden in sich gegenüberliegenden Nuten am Kontaktträger eingreifen.The invention relates to an electromagnetic switching device with a device for connecting the magnet armature to its contact carrier, wherein the magnet armature is penetrated in the region of the side facing away from the pole faces by a leaf spring, the ends of which protrude from the magnet armature engage in opposing grooves on the contact carrier.

Bei einem bekannten Schaltgerät der obengenannten Art (DE-GM 84 31 938) ist der Bewegungsbereich des Ankers durch eine unterhalb der Blattfeder befindliche Traverse beschränkt, d.h. die Blattfeder kann nur in die gestreckte Lage gebracht werden. Nimmt man bei einer derartigen Vorrichtung die Traverse heraus, so kann sich die Blattfeder zwar weiter durchbiegen, sie erfährt jedoch bei Auflage der Blattfeder an den Kanten des Durchgriffes eine Veränderung der Auflagepunkte, so daß sich die Federcharakteristik der Blattfeder schlagartig ändert. Der Erfindung liegt somit die Aufgabe zugrunde, ein Schaltgerät der obengenannten Art zu schaffen, bei dem bei möglichst großem Weg des Magnetankers die Federcharakteristik erhalten bleibt. Dies wird auf einfache Weise dadurch erreicht, daß die Blattfeder an ihrem im Durchgriffbereich liegenden Mittelteil mit einer walzenförmig in Gegenfederrichtung des Magnetankers hervorstehenden, mit der Walzenlängsachse quer zur Blattfederlängsachse verlaufenden Ausformung versehen ist. Um auch die Auflage der Blattfeder an den Kanten der Nuten auf einem möglichst großen Durchbiegungsweg der Blattfeder zu verhindern ist es vorteilhaft, wenn die in die Nuten eingreifenden Enden der Blattfeder auf der der ersten walzenförmigen Ausformung gegenüberliegenden Seite der Blattfeder weitere, parallel zur ersten verlaufende, walzenförmige Ausformungen aufweisen. Um eine Verschiebung der Blattfeder aus der Halterung beim Betrieb zu verhindern, ergibt sich eine einfache Lösung, die darin besteht, daß das eine Ende der Blattfeder über eine der weiteren walzenförmigen Ausformungen hinaus verlängert ist und die Verlängerung geschlitzt mit außenliegenden, krallenförmigen Anformungen versehen ist. Letzteres ist an sich bekannt.In a known switching device of the type mentioned above (DE-GM 84 31 938), the range of motion of the armature is limited by a crossbeam located below the leaf spring, ie the leaf spring can only be brought into the extended position. If the crossbeam is removed from such a device, the leaf spring can bend further, but it experiences a change in the support points when the leaf spring rests on the edges of the passage, so that the spring characteristic of the leaf spring changes suddenly. The invention is therefore based on the object of creating a switching device of the type mentioned above, in which the spring characteristic is retained with the greatest possible travel of the magnet armature. This is achieved in a simple manner in that the leaf spring is provided on its central part lying in the penetration area with a protrusion which extends in the form of a roller in the counter-spring direction of the magnet armature and which extends with the roller longitudinal axis transverse to the leaf spring longitudinal axis. In order to also prevent the leaf spring from resting on the edges of the grooves over the largest possible deflection path of the leaf spring, it is advantageous if the ends of the leaf spring engaging in the grooves on the side of the leaf spring opposite the first cylindrical shape have further, parallel to the first, have cylindrical shapes. In order to prevent displacement of the leaf spring from the holder during operation, a simple solution results there is that one end of the leaf spring is extended beyond one of the other cylindrical formations and the extension is slotted with external, claw-shaped formations. The latter is known per se.

Anhand der Zeichnung wird ein Ausführungsbeispiel gemäß der Erfindung beschrieben.An exemplary embodiment according to the invention is described with reference to the drawing.

Es zeigen:

FIG 1
eine Seitenansicht im Schnitt auf die Kopplung zwischen Magnetanker und Kontaktträger als Prinzipdarstellung,
FIG 2 und 3
Draufsicht und Seitenansicht auf die Blattfeder gemäß der Erfindung.
Show it:
FIG. 1
a side view in section of the coupling between the magnet armature and contact carrier as a schematic diagram,
2 and 3
Top view and side view of the leaf spring according to the invention.

Von dem an sich bekannten elektromagnetischen Schaltgerät ist in der Zeichnung in FIG 1 lediglich ein Teil des Kontaktträgers 1 und des in diesem geführten Magnetankers 2 zu sehen, der über eine Blattfeder 3 am Kontaktträger 1 gehalten ist. Hierzu ist im Magnetanker 2 ein rechteckförmiger Durchbruch 4 vorhanden, der quer zur Lamellierungsrichtung des Magnetankers verläuft. Die Enden 5 der Blattfeder 3 stützen sich in Nuten oder Schlitzen 6 ab. Am Mittelteil 7 der Blattfeder 3 ist eine walzenförmige Ausformung 8 vorhanden, die sich an der Wand 9 des Durchbruches 4 abstützt. Weitere walzenförmige Ausformungen 10 sind an den Enden 5 der Blattfeder vorhanden. Die Ausformungen 10 liegen auf der gegenüberliegenden Seite der Blattfeder 3, in bezug auf die Ausformung 8. Über eine walzenförmige Ausformung 10 hinaus ist die Blattfeder mit einer Verlängerung 11 versehen, die - wie die FIG 2 zeigt - mit einem Schlitz 12 ausgestattet. An den durch den Schlitz 12 gebildeten Armen 13 sind krallenförmige Anformungen 14 vorhanden, die sich an Wänden einer entsprechenden Ausnehmung 15 im Kontaktträger nach dem Einschieben verhaken.Of the electromagnetic switching device known per se, only a part of the contact carrier 1 and the magnet armature 2 guided therein can be seen in the drawing in FIG. 1 and is held on the contact carrier 1 via a leaf spring 3. For this purpose, there is a rectangular opening 4 in the magnet armature 2, which runs transverse to the laminating direction of the magnet armature. The ends 5 of the leaf spring 3 are supported in grooves or slots 6. On the middle part 7 of the leaf spring 3 there is a roller-shaped formation 8 which is supported on the wall 9 of the opening 4. Further cylindrical formations 10 are present at the ends 5 of the leaf spring. The formations 10 lie on the opposite side of the leaf spring 3 with respect to the formation 8. In addition to a roller-shaped formation 10, the leaf spring is provided with an extension 11 which, as shown in FIG. 2, is equipped with a slot 12. Claw-shaped projections 14 are present on the arms 13 formed by the slot 12, which hook on the walls of a corresponding recess 15 in the contact carrier after insertion.

Wird nun der Magnetanker 2 vom Gegenmagnetteil angezogen, so kommt die Blattfeder in ihrer gestreckten Lage nicht zur Anlage an der Wand 9, so daß keine Veränderung der Federauflagepunkte erfolgt. Sie kommt auch in der gestreckten Lage nicht sofort an den Kanten der unteren Wände der Nuten 6 zur Anlage, was ebenfalls eine Veränderung der Auflagepunkte der Blattfeder bewirken würde, sondern sie läßt sich je nach Ausbildung der Ausformungen relativ weit über die gestreckte Lage der Blattfeder hinaus durchbiegen, was einen relativ weiten Weg des Magnetankers 2 zuläßt. Die unteren Wände der Nuten 6 sind, wie die FIG 1 zeigt, in Richtung der Ausformungen 10 vom Magnetanker 2 her möglichst weit zurückgesetzt oder weggelassen. Die Blattfeder kann entsprechend steif ausgeführt werden, so daß eine derartige Durchfederung nur erfolgt, wenn der Kontaktträger, beispielsweise bei verschweißten Kontakten, zurückgehalten wird. Die Ausführung der Ausformungen muß nicht unbedingt walzenförmig sein. Eine im wesentlichen gleiche Wirkung wird auch mit Prismen oder kalottenförmigen Ausformungen erreicht.If the magnet armature 2 is now attracted by the counter-magnet part, the leaf spring does not come into contact in its extended position on the wall 9, so that there is no change in the spring support points. It does not come to rest immediately in the extended position on the edges of the lower walls of the grooves 6, which would also cause a change in the support points of the leaf spring, but it can be relatively far beyond the extended position of the leaf spring, depending on the design of the formations bend, which allows a relatively long path of the armature 2. The lower walls of the grooves 6, as shown in FIG. 1, are set back as far as possible or omitted from the magnet armature 2 in the direction of the formations 10. The leaf spring can be made correspondingly stiff, so that such a deflection only takes place if the contact carrier, for example in the case of welded contacts, is retained. The formations need not necessarily be cylindrical. A substantially identical effect is also achieved with prisms or dome-shaped shapes.

Claims (3)

  1. An electromagnetic switching device with a mechanism for coupling the magnet armature (2) with its contact carrier (1), the magnet armature (2) being penetrated in the region of the side remote from the polar surfaces by a plate spring (3), whose ends projecting from the magnet armature engage in oppositely disposed slots (6) in the contact carrier, characterised in that the plate spring (3) is provided in its central section (7) lying in the region of the through passage with a cylindrical formation (8), which projects in the spring return direction of the magnet armature (2) and extends with its cylindrical longitudinal axis transverse to the longitudinal axis of the plate spring.
  2. A switching device according to claim 1, characterised in that the ends (5) of the plate spring (3) engaging in the slots (6) comprise additional cylindrical formations (10) which extend parallel to the first formation and are located on the opposite side of the plate spring (3) to the first formation.
  3. A switching device according to claim 2, characterised in that one end (5) of the plate spring (3) extends beyond one of the additional cylindrical formations (10) and the extension is slotted (12) and provided with external claw-shaped formations (14).
EP89115487A 1988-09-05 1989-08-22 Electromagnetic switch device Expired - Lifetime EP0358039B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8811205U DE8811205U1 (en) 1988-09-05 1988-09-05 Electromagnetic switching device
DE8811205U 1988-09-05

Publications (3)

Publication Number Publication Date
EP0358039A2 EP0358039A2 (en) 1990-03-14
EP0358039A3 EP0358039A3 (en) 1991-11-06
EP0358039B1 true EP0358039B1 (en) 1994-11-09

Family

ID=6827577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115487A Expired - Lifetime EP0358039B1 (en) 1988-09-05 1989-08-22 Electromagnetic switch device

Country Status (6)

Country Link
US (1) US4918414A (en)
EP (1) EP0358039B1 (en)
JP (1) JP2509063Y2 (en)
AT (1) ATE114076T1 (en)
CA (1) CA1330815C (en)
DE (2) DE8811205U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244444A1 (en) * 1992-12-23 1994-07-07 Mannesmann Ag Electromagnetic valve with electric current feed for electromagnetic coil
DE4244443C2 (en) * 1992-12-23 1998-11-26 Mannesmann Ag Electromagnetic drive

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1709571A (en) * 1925-11-03 1929-04-16 Western Electric Co Electromechanical translating device
FR778326A (en) * 1933-12-02 1935-03-14 Forges Ateliers Const Electr Improvements to electromagnetic contactors
CH311952A (en) * 1953-04-15 1955-12-15 Ag Saia Device for actuating contacts.
US2924685A (en) * 1957-09-26 1960-02-09 Gen Electric Magnetic switch
DE1244919B (en) * 1963-04-11 1967-07-20 Licentia Gmbh Arrangement for holding the core of a switching magnet
US3308404A (en) * 1964-02-10 1967-03-07 Fujita Teizo Electric switch responsive to predetermined or abnormal current condition
DE2142464C3 (en) * 1971-08-25 1974-11-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement for the articulated connection of the armature of an electromagnetic switching device with the contact bridge carrier
DE2162103A1 (en) * 1971-12-15 1973-06-20 Siemens Ag ARRANGEMENT FOR CONNECTING A CONTACT BRIDGE SUPPORT TO THE MOVING MAGNETIC PART OF A SWITCHING MAGNET
DE2307283A1 (en) * 1973-02-14 1974-08-22 Siemens Ag ELECTROMAGNETIC FOLDING ARM RELAY
DE7402795U (en) * 1974-01-28 1974-04-25 Bbc Ag Electromagnetic contactor
JPS50148572U (en) * 1974-07-08 1975-12-10
DE8431938U1 (en) * 1984-10-31 1985-01-31 Brown, Boveri & Cie Ag, 6800 Mannheim Device for connecting a magnet armature of an electromagnetic contactor to the contact carrier
JPH026064Y2 (en) * 1985-08-28 1990-02-14

Also Published As

Publication number Publication date
DE8811205U1 (en) 1988-10-27
EP0358039A2 (en) 1990-03-14
EP0358039A3 (en) 1991-11-06
CA1330815C (en) 1994-07-19
JPH0246347U (en) 1990-03-29
JP2509063Y2 (en) 1996-08-28
ATE114076T1 (en) 1994-11-15
US4918414A (en) 1990-04-17
DE58908623D1 (en) 1994-12-15

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