EP0140284B1 - Electromagnetic relay and method for its manufacture - Google Patents

Electromagnetic relay and method for its manufacture Download PDF

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Publication number
EP0140284B1
EP0140284B1 EP84112526A EP84112526A EP0140284B1 EP 0140284 B1 EP0140284 B1 EP 0140284B1 EP 84112526 A EP84112526 A EP 84112526A EP 84112526 A EP84112526 A EP 84112526A EP 0140284 B1 EP0140284 B1 EP 0140284B1
Authority
EP
European Patent Office
Prior art keywords
coil body
relay
pole plates
relay according
coil
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
Application number
EP84112526A
Other languages
German (de)
French (fr)
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EP0140284A1 (en
Inventor
Helmut Dipl.-Ing. Schedele
Josef Schweiger
Heinz Stadler
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
Priority claimed from DE19833338208 external-priority patent/DE3338208A1/en
Priority claimed from DE19848411399 external-priority patent/DE8411399U1/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84112526T priority Critical patent/ATE35748T1/en
Publication of EP0140284A1 publication Critical patent/EP0140284A1/en
Application granted granted Critical
Publication of EP0140284B1 publication Critical patent/EP0140284B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil
    • H01H51/2254—Contact forms part of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0285—Casings overmoulded over assembled switch or relay

Definitions

  • the invention relates to an electromagnetic relay according to the first part of claim 1 and a method for producing such a relay.
  • a relay of the type mentioned above is known from DE-B 2723220.
  • the design is selected so that a good magnetic coupling is possible on the end faces of the coil body, namely on one end a coupling of the pole plates to a flat permanent magnet and on the other end a coupling of the flux transition plate to a ferromagnetic housing cap.
  • this construction also makes it possible to largely close off the contact space with a sealing film on both end faces of the coil body, so that even when the relay is later embedded in casting resin, the low-viscosity casting compound cannot penetrate into the interior of the coil body.
  • the object of the invention is to make the relay mentioned at the outset even simpler to manufacture by simplifying the design of the individual parts, in the process improving and simplifying the preliminary sealing with a sealing film on both end faces, but at the same time, with the simplest possible part design, also a good closure of the permanent magnetic circuit and of the exciter flow circuit to guarantee.
  • pole plates and spacer lugs on one coil flange and of connecting webs and edge bead on the other coil flange creates a flat contact surface for a sealing film on both ends of the coil body, so that this film only needs to be designed as a flat sheet, so that is easy to apply and also ensures a good seal.
  • metal parts i.e. Pole plates on one side and flux transition plate on the other side
  • there is also a good magnetic coupling through the thin sealing film so that a good coupling for a flat, four-pole permanent magnet on the pole plates and a good coupling for a frame-shaped yoke or on the flux transition plate is also achieved for a ferromagnetic cap.
  • the gaps formed between the pole plates on the one hand and the spacer lugs on the other are angled like a labyrinth. This ensures that when the relay is potted between the sealing film and the coil body, casting resin penetrating must travel as long as possible to the contact space and come to a standstill.
  • the pole plates themselves are expediently cranked in the area between the spacer lugs towards the armature. This creates a sufficient distance between the sealing film and the switching point; in addition, there is an expansion of the capillary gap between the pole plates and the sealing film towards the contact space, whereby the casting resin, if it penetrates so far at all, comes to a standstill.
  • pole plates are expediently symmetrical with respect to the coil axis, if one disregards the connecting pins which are guided downwards in parallel. It is possible to produce only one form of pole plate with connecting pins formed on both sides and to cut off one of the connecting pins before installation.
  • the armature is cut free at its fastening end relative to the film, it only having two connecting webs lying flush in the edge bead of the coil body. Characterized the mobility of the armature when switching is not hindered by a ekanke on sealing foil g, also is prevented from flowing casting compound that there and the spring constant of the armature additionally influenced (capillary). On the other hand, the desired good sealing is achieved by the connecting webs in the bead.
  • the relay is polarized with a flat, four-pole permanent magnet arranged on the pole plates, a frame-shaped yoke enclosing the entire relay.
  • This yoke can consist of two identical sheet metal brackets rotated by 180 ° relative to one another and overlapping one another in the winding area. But it can also be designed as a one-piece frame, which is deformed in the area of the coil winding to compensate for tolerances.
  • the yoke arrangement is formed from two U-shaped sheet metal brackets fitted in opposite directions to one another, the central sections of which run axially parallel on both sides of the coil and the end legs of which are located one above the other in pairs in front of the two end faces of the relay, the matched to one another Surfaces of the abutting end legs of both sheet metal brackets together cover essentially the entire end face of the relay. This ensures that each of the two sheet metal brackets, from the permanent magnet to the flux transition sheet at the opposite relay end, forms a continuous flow path for the permanent magnetic flux, but also for the control flow, whereby this flow path is not interrupted by any air gaps.
  • Both sheet metal brackets can be designed essentially identically and can be attached to the relay by rotating them through 180 °. It is expedient that the end legs, each having approximately half the width in relation to the central section of the sheet metal bracket, are formed on one side of the central section in the lower region and on the other side of the central section in the upper region. A different design of the end legs would also be conceivable. It is only important that the end legs that meet from the two sheet metal brackets of the relay end face are coordinated in such a way that they do not overlap, but instead cover the entire end face of the relay lying in a common plane in order to allow as little leakage flux to escape.
  • the relay including the yoke is expediently embedded on all sides in a casting compound which is only penetrated by the connecting pins and spacer knobs arranged on all sides. These knobs are used to ensure uniform encapsulation with potting compound when the relay is cast in a mold. On the connection side of the relay, they also form spacing lugs for installation on printed circuit boards.
  • the relay shown in FIGS. 1 to 6 has a coil body 1 with a winding 2, an axial cavity 3 and end-side coil flanges 4 and 5.
  • a tongue-shaped armature 6 is fastened with a fastening end 6a in the area of the coil flange 4 via lateral tabs 7, while the free end 6b of the armature can be switched between two pole plates 8 and 8 'in the region of the coil flange 5.
  • These two pole sheets 8 and 8 ' lie essentially flat on the end face of the coil body and, with the interposition of a sealing film 9, form a support surface for a flat, four-pole permanent magnet 10.
  • a connecting pin 8a or 8' is attached to each of the pole sheets 8 and 8 '. 8a '.
  • the contacting ends 8b and 8b ' are cranked into the coil body in order to form contact surfaces there as well as pole surfaces for the armature end 6b.
  • the cranking of the pole plates 8 and 8 ' shifts the working air gaps away from the permanent magnet, so that the permanent magnet poles are better separated from one another.
  • by moving the working air gaps or contact points away from the permanent magnet 10 and from the sealing film 9 an adverse effect of length tolerances of the armature is avoided, and sparks occurring during switching cannot damage the film.
  • the cranked pole plates 8 and 8 'protrude contactlessly on the contact side (8b, 8b') into the coil body opening 3a, as a result of which no capillary gaps can form, and therefore no casting resin can penetrate to the contact surfaces.
  • the armature 6 continues to form a flux transition plate 11 on the coil flange 4, which lies flat on the end face of the coil flange 5.
  • a sealing film 12 is placed over this flow guide plate 11, which, like the sealing film 9, can be designed as a composite film and is fastened, for example, to the end face of the coil body by means of a warm stamp.
  • the entire relay is embedded in potting compound.
  • the fully assembled relay including permanent magnet and yoke each placed in a mold, into which the casting compound is then filled.
  • the coil body has spacer knobs 14 projecting on all sides. In the area of the connection side, these spacer knobs also pass into spacer lugs 15, which are not completely embedded in casting compound and, in a manner known per se, serve to provide a spacing for removing soldering fumes when the relay is soldered onto printed circuit boards.
  • the coil former 1 is shown in a perspective view of the coil flange 4 together with the specially adapted armature 6.
  • the armature is fastened, for example glued, in the grooves 4a of the coil body flange 4 with the fastening tabs 7 already mentioned.
  • the flux transition plate 11 formed on the armature lies in an end-side recess 16 of the coil former flange, the depth of which is somewhat greater than the thickness of the flow transition plate 11.
  • a bead 17 is formed on the coil flange, which on one side in a recess 11a of the river transition plate and continues on the other side of the bobbin opening 3, thereby also enclosing a getter space 18 in the same plane for receiving a columnar getter tablet 19.
  • the getter space 18 has a holding web 18a which is adapted to the contour of the columnar getter 19 at the top and bottom.
  • the getter 19 is thus fixed at the ends, while its middle part is exposed, so that the air from the coil interior connected to the getter space 18 reaches the getter surface unhindered.
  • FIG. 6 shows a perspective view of the other side of the coil former 1 with the coil flange 5, on which the pole plates 8 and 8 'are placed.
  • the coil former flange 5 has mutually opposite, T-shaped spacing lugs 23, against which the pole plates 8 and 8 'each lie laterally, as a result of which the contact distance or the working air gap between the two pole plates is defined.
  • these spacer lugs 23 each engage with cutouts 8c and 8c 'of the pole plates 8 and 8 ' , so that there is a labyrinthine course of the gap formed between the two parts. This makes it difficult for the casting compound to flow into the inside of the coil body.
  • Retaining lugs 24 are formed in the edge regions of the coil flange 5, on which the pole sheets 8 and 8 'are supported in cutouts 8d and 8d'. With this support, the pole plates 8 and 8 'are pressed against the spacer lugs 23, ribs 8e and 8e' ensuring tolerance compensation.
  • the height of the spacer lugs 23 corresponds exactly to the thickness of the pole plates 8 or 8 ', and the height of the holding lugs 24 also suitably corresponds to this thickness. In the region of the coil flange 5, this also results in a flat contact surface for the sealing film 9 surrounding the coil body opening.
  • the two pole plates 8 and 8 ' can initially be completely identical in the strip. Thus, only a pole plate 8 with two connecting pins 8a or 8a 'is punched out and bent. Then, depending on the installation position, either the connecting pin 8a '(for the pole plate 8) or the connecting pin 8a (for the pole plate 8') is cut off from the strip. The two identically designed pole plates are then installed rotated by 180 ° against each other.
  • the individual identical pole sheets 8 or 8 ' are punched and shaped on a sheet metal strip 25 with only one connecting pin 8a or 8a' in between.
  • the strip is then either cut through at the separating points 26 in order to obtain pole plates 8 with connecting pins 8a, or the strip is cut through at the separating points 27 in order to obtain pole plates 8 'with connecting pins 8a'.
  • a modified relay is shown in four sectional views, which has the same advantages as the previously described embodiment. Only the switching axis of the armature is rotated compared to the previously described embodiment, it is now horizontal.
  • the structure of the relay is otherwise comparable. It has a coil former 31 with a winding 32, an interior 33 and two flanges 34 and 35.
  • An armature 36 is arranged inside, which is fastened on one side to the coil flange 34 by means of fastening tabs 37 and with its free end between two pole plates 38 and 38 'is switchable.
  • a sealing film 39 lies on the pole plates 38 and 38 ' , on which a four-pole permanent magnet 40 is arranged.
  • the armature forms two laterally formed flow transition plates 41 a sealing film 42 is closed, and a yoke 43 is provided to close the magnetic circuits.
  • the yoke is designed as a U-shaped bracket, which rests with its central part on the permanent magnet 40 and with its two ends on the flux transition plates 41.
  • a circumferential bead 47 is provided, which surrounds the coil body opening 33 including a getter space 48 for receiving a getter 49 and has only two recesses 50 in which connecting webs 51 of the armature lie. These connecting webs end flat on the end face with the surface of the bead 47, so that a flat contact surface for the sealing film 42 is formed.
  • pole plates 38 and 38 ' are also adapted to the horizontal position of the armature 36.
  • the rest of the design corresponds to the previous embodiment.
  • the height of the spacing lugs 53 and also the holding lugs 54 corresponds to the thickness of the pole plates 38 and 38 ', respectively, so that a flat contact surface for the sealing film 39 is also created here. In a comparable way, this relay is finally embedded in cast resin.
  • the relay shown in FIGS. 12 and 13 is constructed essentially as the relay according to FIGS. 1 to 10.
  • a yoke arrangement is provided, which is formed by two U-shaped sheet metal brackets 61 and 62 made of ferromagnetic material.
  • the two sheet metal brackets 61 and 62 are identical and rotated against each other by 180 ° so that they can be pushed over the relay from both sides.
  • the end legs 61b and 62c lie one above the other in front of the coil flange 5 and cover the entire end face of the permanent magnet 10, while at the other end of the relay the end legs 61c and 62b cover the end face on the coil flange 4 in one plane.
  • Each of the two sheet metal brackets 61 and 62 thus forms a closed flow path without permanent air gap from the permanent magnet 10 to the flux transition sheet 11, which results in a good flux of the magnetic circuit.
  • sheet metal brackets 61 and 62 are very simple, since they can easily be punched on the strip. Assembly is also easy; The end legs are rounded off to make installation easier. These end legs are also slightly pretensioned inwards so that they have to be slightly bent open for assembly and then apply their pretension to the two end faces of the relay. The relay can then be cast with the attached sheet metal brackets 61 and 62 in an additional protective cap or without a protective cap in a mold.

Description

Die Erfindung betrifft ein elektromagnetisches Relais gemäss dem ersten Teil des Patentanspruchs 1 sowie ein Verfahren zur Herstellung eines derartigen Relais.The invention relates to an electromagnetic relay according to the first part of claim 1 and a method for producing such a relay.

Ein Relais der obengenannten Art ist aus der DE-B 2723220 bekannt. Dort ist die Konstruktion so gewählt, dass jeweils eine gute magnetische Ankopplung an den Stirnseiten des Spulenkörpers möglich ist, und zwar an der einen Stirnseite eine Ankopplung der Polbleche an einen flachen Dauermagneten und an der anderen Stirnseite eine Ankopplung des Flussübergangsbleches an eine ferromagnetische Gehäusekappe. Gleichzeitig ist es mit dieser Konstruktion aber auch möglich, mit einer Abdichtfolie auf beiden Stirnseiten des Spulenkörpers den Kontaktraum weitgehend abzuschliessen, so dass auch bei einem späteren Einbetten des Relais in Giessharz die dünnflüssige Vergussmasse nicht in das Innere des Spulenkörpers eindringen kann. Allerdings ist das Aufbringen der Abdichtfolie dort noch verhältnismässig kompliziert, da Niveauunterschiede an der Stirnseite zwischen Spulenkörperoberfläche und Polblechen vorhanden sind und die Abdichtfolie wegen der mit ihren Anschlussstiften an den Aussenseiten des jeweiligen Spulenflansches vorbeigeführten Polbleche U-förmig um den Spulenkörperflansch herum geführt werden muss.A relay of the type mentioned above is known from DE-B 2723220. There, the design is selected so that a good magnetic coupling is possible on the end faces of the coil body, namely on one end a coupling of the pole plates to a flat permanent magnet and on the other end a coupling of the flux transition plate to a ferromagnetic housing cap. At the same time, this construction also makes it possible to largely close off the contact space with a sealing film on both end faces of the coil body, so that even when the relay is later embedded in casting resin, the low-viscosity casting compound cannot penetrate into the interior of the coil body. However, the application of the sealing film there is still relatively complicated, since there are level differences on the end face between the coil body surface and the pole sheets and the sealing film must be guided in a U-shaped manner around the coil body flange due to the pole plates guided past the outside of the respective coil flange with their connecting pins.

Aus der FR-A 2386125 ist ein Relais mit zwei innerhalb des Spulenkörpers parallel zur Achse angeordneten Ankern und mit dazu parallel eingesteckten Polblechen bekannt. Diese Polbleche sind dort nicht flach auf der Stirnseite des Spulenkörpers befestigt, sondern sie sind entweder ganz in einer zur Spulenachse parallelen Ebene ausgerichtet oder bei einer winkelförmigen Ausgestaltung zumindest mit einem Schenkel in einer solchen Ebene angeordnet. Alle Polbleche sind in Nuten parallel zur Spulenachse im Spulenkörper eingesteckt, wobei ihre Positionierung über die Nuten im Spulenkörperinneren erfolgt. Auf den Stirnseiten der Spulenkörper ergibt sich damit nicht ohne weiteres eine ebene Auflagefläche für eine Folie, so dass die Abdichtung des Spulenkörperinnenraums verhältnismässig viel Aufwand und Raum erfordert.From FR-A 2386125 a relay with two armatures arranged parallel to the axis within the coil former and with pole plates inserted parallel thereto is known. These pole plates are not fastened flat there on the end face of the coil body, but they are either completely aligned in a plane parallel to the coil axis or, in the case of an angular configuration, are arranged at least with one leg in such a plane. All pole plates are inserted in grooves parallel to the coil axis in the coil body, and their positioning takes place via the grooves in the inside of the coil body. On the end faces of the bobbin there is thus not readily a flat contact surface for a film, so that the sealing of the interior of the bobbin requires a relatively large amount of effort and space.

Aufgabe der Erfindung ist es, das eingangs genannte Relais durch einfachere Gestaltung der Einzelteile noch fertigungsgünstiger auszugestalten, dabei die Vorabdichtung mit einer Abdichtfolie an beiden Stirnseiten zu verbessern und zu vereinfachen, gleichzeitig aber mit möglichst einfacher Teilegestaltung auch einen guten Schluss des dauermagnetischen Kreises und des Erregerflusskreises zu gewährleisten.The object of the invention is to make the relay mentioned at the outset even simpler to manufacture by simplifying the design of the individual parts, in the process improving and simplifying the preliminary sealing with a sealing film on both end faces, but at the same time, with the simplest possible part design, also a good closure of the permanent magnetic circuit and of the exciter flow circuit to guarantee.

Diese Aufgabe wird erfindungsgemäss mit den Merkmalen im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved according to the invention with the features in the characterizing part of patent claim 1.

Durch die erfindungsgemäss vorgesehene Gestaltung von Polblechen und Abstandsnasen an dem einen Spulenflansch und von Verbindungsstegen und Randwulst am anderen Spulenflansch wird an beiden Stirnseiten des Spulenkörpers jeweils eine ebene Auflagefläche für eine Abdichtfolie geschaffen, so dass diese Folie lediglich als ebenes Blatt ausgebildet zu sein braucht, damit einfach aufzubringen ist und auch eine gute Abdichtung gewährleistet. Durch diese Abstimmung von vorstehenden Teilen des Spulenkörpers und aufliegenden Metallteilen, d.h. Polblechen an einer Seite und Flussübergangsblech an der anderen Seite, ergibt sich auch eine gute magnetische Ankopplung durch die dünn gehaltene Abdichtfolie hindurch, so dass an den Polblechen eine gute Ankopplung für einen flachen, vierpoligen Dauermagneten und am Flussübergangsblech eine gute Ankopplung für ein rahmenförmiges Joch oder auch für eine ferromagnetische Kappe erzielt wird.The inventive design of pole plates and spacer lugs on one coil flange and of connecting webs and edge bead on the other coil flange creates a flat contact surface for a sealing film on both ends of the coil body, so that this film only needs to be designed as a flat sheet, so that is easy to apply and also ensures a good seal. By matching projecting parts of the bobbin and overlying metal parts, i.e. Pole plates on one side and flux transition plate on the other side, there is also a good magnetic coupling through the thin sealing film, so that a good coupling for a flat, four-pole permanent magnet on the pole plates and a good coupling for a frame-shaped yoke or on the flux transition plate is also achieved for a ferromagnetic cap.

In weiterer Ausgestaltung des erfindungsgemässen Relais ist vorgesehen, dass die zwischen den Polblechen einerseits und den Abstandsnasen andererseits gebildeten Spalte labyrinthartig abgewinkelt sind. Damit wird gewährleistet, dass beim Vergiessen des Relais zwischen der Abdichtfolie und dem Spulenkörper eindringendes Giessharz einen möglichst langen Weg bis zum Kontaktraum überwinden muss und dabei zum Stillstand kommt. Die Polbleche selbst sind zweckmässigerweise im Bereich zwischen den Abstandsnasen zum Anker hin gekröpft ausgebildet. Dadurch wird ein ausreichender Abstand zwischen der Abdichtfolie und der Schaltstelle geschaffen; ausserdem ergibt sich zum Kontaktraum hin eine Erweiterung des Kapillarspaltes zwischen den Polblechen und der Abdichtfolie, wodurch das Giessharz, falls es überhaupt soweit vordringt, in jedem Fall zum Stillstand kommt. Die Polbleche sind zweckmässigerweise bezüglich der Spulenachse symmetrisch ausgebildet, wenn man von den parallel nach unten geführten Anschlussstiften absieht. Dabei ist es möglich, jeweils nur eine Form von Polblechen mit an beiden Seiten angeformten Anschlussstiften herzustellen und vor dem Einbau wahlweise jeweils einen der Anschlussstifte abzuschneiden.In a further embodiment of the relay according to the invention it is provided that the gaps formed between the pole plates on the one hand and the spacer lugs on the other are angled like a labyrinth. This ensures that when the relay is potted between the sealing film and the coil body, casting resin penetrating must travel as long as possible to the contact space and come to a standstill. The pole plates themselves are expediently cranked in the area between the spacer lugs towards the armature. This creates a sufficient distance between the sealing film and the switching point; in addition, there is an expansion of the capillary gap between the pole plates and the sealing film towards the contact space, whereby the casting resin, if it penetrates so far at all, comes to a standstill. The pole plates are expediently symmetrical with respect to the coil axis, if one disregards the connecting pins which are guided downwards in parallel. It is possible to produce only one form of pole plate with connecting pins formed on both sides and to cut off one of the connecting pins before installation.

In weiterer Ausgestaltung ist der Anker an seinem Befestigungsende gegenüber der Folie freigeschnitten, wobei er lediglich zwei bündig in dem Randwulst des Spulenkörpers liegende Verbindungsstege aufweist. Dadurch ist die Beweglichkeit des Ankers beim Schalten nicht durch eine aufgeklebte Abdichtfolie behindert, ausserdem wird verhindert, dass Vergussmasse dorthin fliesst und die Federkonstante des Ankers zusätzlich beeinflusst (Kapillarsperre). Andererseits wird durch die Verbindungsstege im Randwulst die gewünschte gute Abdichtung erreicht.In a further embodiment, the armature is cut free at its fastening end relative to the film, it only having two connecting webs lying flush in the edge bead of the coil body. Characterized the mobility of the armature when switching is not hindered by a eklebte on sealing foil g, also is prevented from flowing casting compound that there and the spring constant of the armature additionally influenced (capillary). On the other hand, the desired good sealing is achieved by the connecting webs in the bead.

In zweckmässiger Ausgestaltung ist das Relais polarisiert mit einem auf den Polblechen angeordneten flachen, vierpoligen Dauermagneten ausgeführt, wobei ein rahmenförmiges Joch das gesamte Relais umschliesst. Dieses Joch kann aus zwei identischen, gegeneinander um 180° gedrehten und einander im Wicklungsbereich überlappenden Blechbügeln bestehen. Es kann aber auch als einstückiger Rahmen ausgebildet sein, der im Bereich der Spulenwicklung zum Toleranzausgleich deformiert ist.In an expedient embodiment, the relay is polarized with a flat, four-pole permanent magnet arranged on the pole plates, a frame-shaped yoke enclosing the entire relay. This yoke can consist of two identical sheet metal brackets rotated by 180 ° relative to one another and overlapping one another in the winding area. But it can also be designed as a one-piece frame, which is deformed in the area of the coil winding to compensate for tolerances.

In besonders vorteilhafter Ausgestaltung ist die Jochanordnung aus zwei gegensinning auf das Relais aufgesteckten U-förmigen Blechbügeln gebildet, deren Mittelabschnitte achsparallel beiderseits der Spule verlaufen und deren Endschenkel jeweils paarweise vor den beiden Stirnseiten des Relais in je einer gemeinsamen Ebene übereinander liegen, wobei die aneinander angepassten Flächen der aneinander stossenden Endschenkel beider Blechbügel gemeinsam im wesentlichen die gesamte Stirnfläche des Relais bedecken. Dadurch wird sichergestellt, dass jeder der beiden Blechbügel vom Dauermagnet bis zum Flussübergangsblech am entgegengesetzten Relaisende einen durchgehenden Flusspfad für den Dauermagnetfluss, aber auch für den Steuerfluss, bildet, wobei dieser Flusspfad durch keine Luftspalte unterbrochen wird. Beide Blechbügel können im wesentlichen identisch ausgebildet und gegeneinander um 180° verdreht auf das Relais aufgesteckt sein. Dabei ist es zweckmässig, dass die gegenüber dem Mittelabschnitt des Blechbügels jeweils etwa die halbe Breite aufweisenden Endschenkel an einer Seite des Mittelabschnittes im unteren Bereich und an der anderen Seite des Mittelabschnitts im oberen Bereich angeformt sind. Denkbar wäre aber auch eine andere Gestaltung der Endschenkel. Wichtig ist nur, dass die von den beiden Blechbügeln Relaisstirnseite zusammentreffenden Endschenkel in ihren Flächen derart abgestimmt sind, dass sie sich nicht überdecken, sondern in einer gemeinsamen Ebene liegend die gesamte Stirnseite des Relais abdecken, um möglichst wenig Streufluss entweichen zu lassen.In a particularly advantageous embodiment, the yoke arrangement is formed from two U-shaped sheet metal brackets fitted in opposite directions to one another, the central sections of which run axially parallel on both sides of the coil and the end legs of which are located one above the other in pairs in front of the two end faces of the relay, the matched to one another Surfaces of the abutting end legs of both sheet metal brackets together cover essentially the entire end face of the relay. This ensures that each of the two sheet metal brackets, from the permanent magnet to the flux transition sheet at the opposite relay end, forms a continuous flow path for the permanent magnetic flux, but also for the control flow, whereby this flow path is not interrupted by any air gaps. Both sheet metal brackets can be designed essentially identically and can be attached to the relay by rotating them through 180 °. It is expedient that the end legs, each having approximately half the width in relation to the central section of the sheet metal bracket, are formed on one side of the central section in the lower region and on the other side of the central section in the upper region. A different design of the end legs would also be conceivable. It is only important that the end legs that meet from the two sheet metal brackets of the relay end face are coordinated in such a way that they do not overlap, but instead cover the entire end face of the relay lying in a common plane in order to allow as little leakage flux to escape.

Das Relais einschliesslich des Joches wird zweckmässigerweise allseitig in eine Vergussmasse eingebettet, die lediglich von den Anschlussstiften sowie von allseitig angeordneten Abstandsnoppen durchsetzt wird. Diese Noppen dienen dazu, beim Vergiessen des Relais in einer Form eine gleichmässige Umhüllung mit Vergussmasse zu gewährleisten. An der Anschlussseite des Relais bilden sie gleichzeitig Abstandsnasen für den Einbau auf Leiterplatten.The relay including the yoke is expediently embedded on all sides in a casting compound which is only penetrated by the connecting pins and spacer knobs arranged on all sides. These knobs are used to ensure uniform encapsulation with potting compound when the relay is cast in a mold. On the connection side of the relay, they also form spacing lugs for installation on printed circuit boards.

Zweckmässige Verfahrensschritte zur Herstellung des erfindungsgemässen Relais sind in den Ansprüchen 17 bis 19 angegeben.Appropriate method steps for producing the relay according to the invention are specified in claims 17 to 19.

Die Erfindung wird nachfolgend an Ausführungsbeispielen anhand der Zeichnung näher erläutert. Es zeigen

  • Fig. 1 bis 4 ein erfindungsgemässes Relais in verschiedenen Schnittansichten,
  • Fig. 5 den Spulenkörper mit einzusetzendem Anker in perspektivischer Ansicht von einer Flanschseite,
  • Fig. 6 den Spulenkörper mit einzusetzenden Polblechen in perspektivischer Ansicht von der anderen Flanschseite,
  • Fig. 7 bis 10 eine weitere Ausführungsform des erfindungsgemässen Relais in verschiedenen Schnittansichten,
  • Fig. 11 die Herstellung von Polblechen für das Relais gemäss Fig. 1 bis 6 aus einem Blechstreifen,
  • Fig. 12 ein erfindungsgemässens Relais mit einer abgewandelten Jochanordnung in Explosionsdarstellung,
  • Fig. 13 das Relais von Fig. 12 mit aufgesteckter Jochanordnung.
The invention is explained in more detail below using exemplary embodiments with reference to the drawing. Show it
  • 1 to 4 an inventive relay in different sectional views,
  • 5 the bobbin with the armature to be inserted in a perspective view from a flange side,
  • 6 shows the coil former with pole plates to be inserted in a perspective view from the other flange side,
  • 7 to 10 a further embodiment of the relay according to the invention in different sectional views,
  • 11 shows the manufacture of pole sheets for the relay according to FIGS. 1 to 6 from a sheet metal strip,
  • 12 an inventive relay with a modified yoke arrangement in an exploded view,
  • Fig. 13, the relay of Fig. 12 with the yoke arrangement attached.

Das in den Fig. 1 bis 6 dargestellte Relais besitzt einen Spulenkörper 1 mit einer Wicklung 2, einem axialen Hohlraum 3 sowie endseitigen Spulenflanschen 4 und 5. Ein zungenförmiger Anker 6 ist mit einem Befestigungsende 6a im Bereich des Spulenflansches 4 über seitliche Lappen 7 befestigt, während das freie Ende 6b des Ankers zwischen zwei Polblechen 8 bzw. 8' im Bereich des Spulenflansches 5 umschaltbar ist. Diese beiden Polbleche 8 bzw. 8' liegen im wesentlichen flach auf der Stirnseite des Spulenkörpers auf und bilden unter Zwischenfügung einer Abdichtfolie 9 eine Auflagefläche für einen flachen, vierpoligen Dauermagneten 10. An den Polblechen 8 bzw. 8' ist jeweils ein Anschlussstift 8a bzw. 8a' ausgebildet. Ausserdem sind die kontaktgebenden Enden 8b bzw. 8b' in den Spulenkörper hinein gekröpft, um dort Kontaktflächen wie auch Polflächen für das Ankerende 6b zu bilden. Durch dieses Abkröpfen der Polbleche 8 bzw. 8' werden die Arbeitsluftspalte etws vom Dauermagneten weg verlagert, so dass die Dauermagnetpole besser voneinander getrennt werden. Ausserdem wird durch die Wegverlagerung der Arbeitsluftspalte bzw. Kontaktstellen vom Dauermagneten 10 und von der Abdichtfolie 9 eine nachteilige Auswirkung von Längentoleranzen des Ankers vermieden, und beim Schalten auftretende Funken können die Folie nicht beschädigen. Die gekröpften Polbleche 8 und 8' ragen kontaktseitig (8b, 8b') berührungslos in die Spulenkörperöffnung 3a, wodurch sich keine Kapillarspalten bilden können, und damit kann kein Giessharz zu den Kontaktflächen vordringen.The relay shown in FIGS. 1 to 6 has a coil body 1 with a winding 2, an axial cavity 3 and end-side coil flanges 4 and 5. A tongue-shaped armature 6 is fastened with a fastening end 6a in the area of the coil flange 4 via lateral tabs 7, while the free end 6b of the armature can be switched between two pole plates 8 and 8 'in the region of the coil flange 5. These two pole sheets 8 and 8 'lie essentially flat on the end face of the coil body and, with the interposition of a sealing film 9, form a support surface for a flat, four-pole permanent magnet 10. A connecting pin 8a or 8' is attached to each of the pole sheets 8 and 8 '. 8a '. In addition, the contacting ends 8b and 8b 'are cranked into the coil body in order to form contact surfaces there as well as pole surfaces for the armature end 6b. The cranking of the pole plates 8 and 8 'shifts the working air gaps away from the permanent magnet, so that the permanent magnet poles are better separated from one another. In addition, by moving the working air gaps or contact points away from the permanent magnet 10 and from the sealing film 9, an adverse effect of length tolerances of the armature is avoided, and sparks occurring during switching cannot damage the film. The cranked pole plates 8 and 8 'protrude contactlessly on the contact side (8b, 8b') into the coil body opening 3a, as a result of which no capillary gaps can form, and therefore no casting resin can penetrate to the contact surfaces.

Am Spulenflansch 4 bildet der Anker 6 in Fortsetzung ein Flussübergangsblech 11, welches flach auf der Stirnseite des Spulenflansches 5 aufliegt. Über dieses Flussführungsblech 11 ist eine Abdichtfolie 12 gelegt, welche ebenso wie die Abdichtfolie 9 als Verbundfolie ausgebildet sein kann und beispielsweise mittels eines warmen Stempels auf der Spulenkörper-Stirnseite befestigt wird. Ein rahmenförmiges Joch 13, bestehend aus zwei identischen, gegeneinander um 180° verdreht angeordneten Jochbügeln 13a, ist um das gesamte Relais herum gelegt und an der einen Stirnseite mit dem Dauermagneten 10 sowie an der anderen Stirnseite mit dem Flussführungsblech 11 gekoppelt. Im Bereich der Spulenwicklung 2 überlappen sich die Enden der beiden Jochbügel 13a; falls notwendig, können sie in diesem Bereich auch miteinander verschweisst werden.The armature 6 continues to form a flux transition plate 11 on the coil flange 4, which lies flat on the end face of the coil flange 5. A sealing film 12 is placed over this flow guide plate 11, which, like the sealing film 9, can be designed as a composite film and is fastened, for example, to the end face of the coil body by means of a warm stamp. A frame-shaped yoke 13, consisting of two identical yoke brackets 13 a, which are arranged rotated by 180 ° relative to one another, is placed around the entire relay and coupled on one end face to the permanent magnet 10 and on the other end face to the flux guide plate 11. In the area of the coil winding 2, the ends of the two yoke brackets 13a overlap; if necessary, they can also be welded together in this area.

Das gesamte Relais ist in Vergussmasse eingebettet. Zu diesem Zweck wird das fertig montierte Relais einschliesslich Dauermagnet und Joch jeweils in eine Giessform gebracht, in die dann Vergussmasse eingefüllt wird. Um das Relais innerhalb der Vergussmasse richtig zu positionieren, weist der Spulenkörper nach allen Seiten vorstehende Abstandsnoppen 14 auf. Im Bereich der Anschlussseite gehen diese Abstandsnoppen ausserdem in Abstandsnasen 15 über, welche nicht vollständig in Vergussmasse eingebettet werden und in an sich bekannter Weise dazu dienen, beim Einlöten des Relais auf Leiterplatten einen Abstand zum Abziehen von Lötdämpfen zu gewäh rleisten.The entire relay is embedded in potting compound. For this purpose, the fully assembled relay including permanent magnet and yoke each placed in a mold, into which the casting compound is then filled. In order to correctly position the relay within the casting compound, the coil body has spacer knobs 14 projecting on all sides. In the area of the connection side, these spacer knobs also pass into spacer lugs 15, which are not completely embedded in casting compound and, in a manner known per se, serve to provide a spacing for removing soldering fumes when the relay is soldered onto printed circuit boards.

In Fig. 5 ist der Spulenkörper 1 in einer perspektivischen Sicht auf den Spulenflansch 4 zusammen mit dem speziell angepassten Anker 6 dargestellt. Der Anker wird mit den bereits erwähnten Befestigungslappen 7 in Nuten 4a des Spulenkörperflansches 4 befestigt, beispielsweise eingeklebt. Dabei liegt das an den Anker angeformte Flussübergangsblech 11 in einer stirnseitigen Vertiefung 16 des Spulenkörperflansches, deren Tiefe etwas grösser ist als die Dicke des Flussübergangsbleches 11. Um den Spulenkörperinnenraum 3 herum ist am Spulenflansch ein Wulst 17 angeformt, der an einer Seite in einer Ausnehmung 11a des Flussübergangsbleches liegt und sich an der anderen Seite der Spulenkörperöffnung 3 fortsetzt, dabei in der gleichen Ebene auch noch einen Getterraum 18 zur Aufnahme einer säulenförmigen Gettertablette 19 mit umschliesst. Der Getterraum 18 weist oben und unten jeweils einen an die Kontur des säulenförmigen Getters 19 angepassten Haltesteg 18a auf. Damit wird der Getter 19 an den Enden fixiert, während sein Mittelteil freiliegt, so dass die Luft aus dem mit dem Getterraum 18 in Verbindung stehenden Spuleninnenraum ungehindert an die Getteroberfläche gelangt.5, the coil former 1 is shown in a perspective view of the coil flange 4 together with the specially adapted armature 6. The armature is fastened, for example glued, in the grooves 4a of the coil body flange 4 with the fastening tabs 7 already mentioned. The flux transition plate 11 formed on the armature lies in an end-side recess 16 of the coil former flange, the depth of which is somewhat greater than the thickness of the flow transition plate 11. Around the coil former interior 3, a bead 17 is formed on the coil flange, which on one side in a recess 11a of the river transition plate and continues on the other side of the bobbin opening 3, thereby also enclosing a getter space 18 in the same plane for receiving a columnar getter tablet 19. The getter space 18 has a holding web 18a which is adapted to the contour of the columnar getter 19 at the top and bottom. The getter 19 is thus fixed at the ends, while its middle part is exposed, so that the air from the coil interior connected to the getter space 18 reaches the getter surface unhindered.

In den zwei Ausnehmungen 20 des Wulstes 17 liegen zwei am Anker angeformte Verbindungsstege 21, die einen freigeschnittenen Abschnitt 22 des Ankers begrenzen. Dadurch ist die freie Beweglichkeit des Ankers 6 auch nach dem Aufbringen der Abdichtfolie 12 gewährleistet, während andererseits die Verbindungsstege 21 an ihrer Endfläche genau eben mit der Oberfläche des Wulstes 17 abschliessen, so dass der Wulst 17 zusammen mit den Verbindungsstegen 21 eine ebene Oberfläche für die Auflage der Abdichtfolie 12 (Fig. 1 und 2) bildet. Damit kann diese Abdichtfolie als einfaches ebenes Blättchen auf die Stirnseite des Spulenkörperflansches 4 aufgelegt und mit einem einfachen Stempel etwa durch Warmverformung einer Folienschicht, befestigt werden. Beim Vergiessen dringt das Giessharz auch in die stirnseitige Vertiefung 16 und in die erweiterten Kammern 4b ein. Dadurch wird der Anker 6 sowohl im Bereich seines Flussübergangsblechs 11 als auch seiner seitlichen Lappen 7 zusätzlich durch das Harz fixiert.In the two recesses 20 of the bead 17 there are two connecting webs 21 formed on the armature and delimiting a cut-out section 22 of the armature. This ensures that the armature 6 can move freely even after the sealing film 12 has been applied, while, on the other hand, the connecting webs 21 terminate exactly flat on the end face of the bead 17, so that the bead 17 together with the connecting webs 21 provide a flat surface for the Form the sealing film 12 (Fig. 1 and 2). This sealing film can thus be placed as a simple flat sheet on the end face of the coil body flange 4 and fastened with a simple stamp, for example by thermoforming a film layer. When casting, the casting resin also penetrates into the recess 16 on the face side and into the enlarged chambers 4b. As a result, the anchor 6 is additionally fixed by the resin both in the region of its flow transition plate 11 and in its lateral tabs 7.

Fig. 6 zeigt eine perspektivische Sicht auf die andere Seite des Spulenkörpers 1 mit dem Spulenflansch 5, auf welchem die Polbleche 8 bzw. 8' aufgesetzt werden. Der Spulenkörperflansch 5 besitzt dabei einander gegenüberliegende, T-förmige Abstandsnasen 23, an welchen die Polbleche 8 bzw. 8' jeweils seitlich anliegen, wodurch der Kontaktabstand bzw. der Arbeitsluftspalt zwischen beiden Polblechen festgelegt wird. Mit den Querstücken 23a greifen diese Abstandsnasen 23 jeweils mit Ausschnitten 8c bzw. 8c' der Polbleche 8 bzw. 8' ineinander, so dass sich ein labyrinthartiger Verlauf des zwischen beiden Teilen gebildeten Spaltes ergibt. Dadurch wird das Einfliessen von Vergussmasse in das Spulenkörperinnere erschwert.6 shows a perspective view of the other side of the coil former 1 with the coil flange 5, on which the pole plates 8 and 8 'are placed. The coil former flange 5 has mutually opposite, T-shaped spacing lugs 23, against which the pole plates 8 and 8 'each lie laterally, as a result of which the contact distance or the working air gap between the two pole plates is defined. With the cross pieces 23a, these spacer lugs 23 each engage with cutouts 8c and 8c 'of the pole plates 8 and 8 ' , so that there is a labyrinthine course of the gap formed between the two parts. This makes it difficult for the casting compound to flow into the inside of the coil body.

In den Randbereichen des Spulenflansches 5 sind Haltenasen 24 angeformt, an denen sich die Polbleche 8 bzw 8' in Ausschnitten 8d bzw. 8d' abstützen. Mit dieser Abstützung werden die Polbleche 8 bzw. 8' gegen die Abstandsnasen 23 gepresst, wobei Rippen 8e bzw. 8e' für einen Toleranzausgleich sorgen. Die Höhe der Abstandsnasen 23 entspricht genau der Dicke der Polbleche 8 bzw. 8', zweckmässigerweise entspricht auch die Höhe der Haltenasen 24 dieser Dicke. Dadurch ergibt sich auch im Bereich des Spulenflansches 5 eine die Spulenkörperöffnung umschliessende ebene Auflagefläche für die Abdichtfolie 9.Retaining lugs 24 are formed in the edge regions of the coil flange 5, on which the pole sheets 8 and 8 'are supported in cutouts 8d and 8d'. With this support, the pole plates 8 and 8 'are pressed against the spacer lugs 23, ribs 8e and 8e' ensuring tolerance compensation. The height of the spacer lugs 23 corresponds exactly to the thickness of the pole plates 8 or 8 ', and the height of the holding lugs 24 also suitably corresponds to this thickness. In the region of the coil flange 5, this also results in a flat contact surface for the sealing film 9 surrounding the coil body opening.

Wie aus Fig. 6 ersichtlich ist, können die beiden Polbleche 8 und 8' zunächst völlig identisch im Streifen ausgebildet sein. Es wird also lediglich ein Polblech 8 mit zwei Anschlussstiften 8a bzw. 8a' ausgestanzt und gebogen. Danach wird je nach Einbaulage entweder der Anschlussstift 8a' (beim Polblech 8) oder der Anschlussstift 8a (beim Polblech 8') vom Streifen abgeschnitten. Die beiden identisch ausgebildeten Polbleche werden dann um 180° gegeneinander verdreht eingebaut.As can be seen from Fig. 6, the two pole plates 8 and 8 'can initially be completely identical in the strip. Thus, only a pole plate 8 with two connecting pins 8a or 8a 'is punched out and bent. Then, depending on the installation position, either the connecting pin 8a '(for the pole plate 8) or the connecting pin 8a (for the pole plate 8') is cut off from the strip. The two identically designed pole plates are then installed rotated by 180 ° against each other.

Fertigungstechnisch noch günstiger ist es, wenn gemäss Fig. 11 die einzelnen identischen Polbleche 8 bzw. 8' mit jeweils nur einem zwischenliegenden Anschlussstift 8a bzw. 8a' an einem Blechstreifen 25 ausgestanzt und geformt werden. Beim Vereinzeln wird dann der Streifen entweder an den Trennstellen 26 durchschnitten, um Polbleche 8 mit Anschlussstiften 8a zu erhalten, oder der Streifen wird an den Trennstellen 27 durchschnitten, um Polbleche 8' mit Anschlussstiften 8a' zu erhalten.In terms of production technology, it is even more favorable if, according to FIG. 11, the individual identical pole sheets 8 or 8 'are punched and shaped on a sheet metal strip 25 with only one connecting pin 8a or 8a' in between. When separating, the strip is then either cut through at the separating points 26 in order to obtain pole plates 8 with connecting pins 8a, or the strip is cut through at the separating points 27 in order to obtain pole plates 8 'with connecting pins 8a'.

In den Fig. 7 bis 10 ist ein abgewandeltes Relais in vier Schnittansichten dargestellt, das die gleichen Vorteile wie das vorher beschriebene Ausführungsbeispiel aufweist. Lediglich die Schaltachse des Ankers ist gegenüber dem vorher beschriebenen Ausführungsbeispiel gedreht, sie liegt nunmehr waagrecht. Ansonsten ist der Aufbau des Relais vergleichbar. Es besitzt einen Spulenkörper 31 mit einer Wicklung 32, einem Innenraum 33 und zwei Flanschen 34 und 35. Im Inneren ist ein Anker 36 angeordnet, der an einer Seite über Befestigungslappen 37 am Spulenflansch 34 befestigt ist und mit seinem freien Ende zwischen zwei Polblechen 38 bzw. 38' umschaltbar ist. Eine Abdichtfolie 39 liegt auf den Polblechen 38 bzw. 38', darauf ist ein vierpoliger Dauermagnet 40 angeordnet. Auf der gegenüberliegenden Seite bildet der Anker zwei seitlich angeformte Flussübergangsbleche 41. Diese Stirnseite ist mit einer Abdichtfolie 42 abgeschlossen, und zum Schliessen der magnetischen Kreise ist ein Joch 43 vorgesehen. In diesem Fall ist das Joch als U-förmiger Bügel ausgeführt, der mit seinem Mittelteil am Dauermagneten 40 und mit seinen beiden Enden an den Flussübergangsblechen 41 anliegt.7 to 10, a modified relay is shown in four sectional views, which has the same advantages as the previously described embodiment. Only the switching axis of the armature is rotated compared to the previously described embodiment, it is now horizontal. The structure of the relay is otherwise comparable. It has a coil former 31 with a winding 32, an interior 33 and two flanges 34 and 35. An armature 36 is arranged inside, which is fastened on one side to the coil flange 34 by means of fastening tabs 37 and with its free end between two pole plates 38 and 38 'is switchable. A sealing film 39 lies on the pole plates 38 and 38 ' , on which a four-pole permanent magnet 40 is arranged. On the opposite side, the armature forms two laterally formed flow transition plates 41 a sealing film 42 is closed, and a yoke 43 is provided to close the magnetic circuits. In this case, the yoke is designed as a U-shaped bracket, which rests with its central part on the permanent magnet 40 and with its two ends on the flux transition plates 41.

An der Stirnseite des Spulenflansches 34 ist ein umlaufender Wulst 47 vorgesehen, der die Spulenkörperöffnung 33 einschliesslich eines Getterraumes 48 zur Aufnahme eines Getters 49 umschliesst und lediglich zwei Ausnehmungen 50 besitzt, in denen Verbindungsstege 51 des Ankers liegen. Diese Verbindungsstege schliessen stirnseitig eben mit der Oberfläche des Wulstes 47 ab, so dass eine ebene Auflagefläche für die Abdichtfolie 42 gebildet ist.On the end face of the coil flange 34, a circumferential bead 47 is provided, which surrounds the coil body opening 33 including a getter space 48 for receiving a getter 49 and has only two recesses 50 in which connecting webs 51 of the armature lie. These connecting webs end flat on the end face with the surface of the bead 47, so that a flat contact surface for the sealing film 42 is formed.

Am anderen Spulenflansch 35 sind die Polbleche 38 bzw. 38' ebenfalls an die waagrechte Lage des Ankers 36 angepasst. Diese Polbleche 38 bzw. 38' liegen jeweils an Abstandsnasen 53 an und stützen sich am oberen bzw. am unteren Rand des Spulenflansches 35 an Haltenasen 54 ab. Die übrige Gestaltung entspricht dem vorherigen Ausführungsbeispiel. So entspricht die Höhe der Abstandsnasen 53 und auch der Haltenasen 54 der Dicke der Polbleche 38 bzw. 38', so dass auch hier eine ebene Auflagefläche für die Abdichtfolie 39 geschaffen wird. In vergleichbarer Weise ist auch dieses Relais schliesslich in Giessharz eingebettet.On the other coil flange 35, the pole plates 38 and 38 'are also adapted to the horizontal position of the armature 36. These pole plates 38 and 38 'each rest on spacer lugs 53 and are supported on holding lugs 54 on the upper and lower edges of the coil flange 35. The rest of the design corresponds to the previous embodiment. The height of the spacing lugs 53 and also the holding lugs 54 corresponds to the thickness of the pole plates 38 and 38 ', respectively, so that a flat contact surface for the sealing film 39 is also created here. In a comparable way, this relay is finally embedded in cast resin.

Das in den Fig. 12 und 13 dargestellte Relais ist im wesentlichen so aufgebaut wie das Relais gemäss Fig. 1 bis 10.The relay shown in FIGS. 12 and 13 is constructed essentially as the relay according to FIGS. 1 to 10.

Zur Führung der magnetischen Flüsse zwischen den beiden Stirnseiten des Relais ist eine Jochanordnung vorgesehen, welche von zwei U-förmigen Blechbügeln 61 und 62 aus ferromagnetischem Material gebildet ist. Die beiden Blechbügel 61 und 62 sind identisch ausgebildet und gegeneinander um 180° gedreht, so dass sie von den beiden Seiten her über das Relais geschoben werden können. Wie in Fig. 2 gezeigt, bedeckt man jeweils ein Mittelteil 61 a bzw. 62a eine Längsseite des Relais neben der Spulenwicklung, während die Endschenkel 61 b, 61 c sowie 62b und 62c an den Stirnseiten des Relais paarweise übereinander liegen. So liegen die Endschnenkel 61b und 62c vor dem Spulenflansch 5 in einer Ebene übereinander und bedekken die gesamte Stirnseite des Dauermagneten 10, während am anderen Ende des Relais die Endschenkel 61c und 62b in einer Ebene liegend die Stirnseite am Spulenflansch 4 bedecken.To guide the magnetic fluxes between the two end faces of the relay, a yoke arrangement is provided, which is formed by two U-shaped sheet metal brackets 61 and 62 made of ferromagnetic material. The two sheet metal brackets 61 and 62 are identical and rotated against each other by 180 ° so that they can be pushed over the relay from both sides. As shown in Fig. 2, one covers a middle part 61 a and 62a one long side of the relay next to the coil winding, while the end legs 61 b, 61 c and 62b and 62c are in pairs on the end faces of the relay one above the other. Thus, the end legs 61b and 62c lie one above the other in front of the coil flange 5 and cover the entire end face of the permanent magnet 10, while at the other end of the relay the end legs 61c and 62b cover the end face on the coil flange 4 in one plane.

Jeder der beiden Blechbügel 61 und 62 bildet somit vom Dauermagneten 10 bis zum Flussübergangsblech 11 einen geschlossenen Flusspfad ohne zwischenliegenden Luftspalt, wodurch sich ein guter Fluss des Magnetkreises ergibt. Dies gilt sowohl für den Fluss des Dauermagneten 10 als auch für den Steuerfluss von der Wicklung 2, der über die Polbleche 8 bzw. 8' teilweise durch den dünnen Dauermagneten hindurch und teilweise über die Schmalseiten der Polbleche auf die Blechbügel 61 und 62 gelangt und sich von dort über das Flussübergangsblech 11 sowie den Anker 6 schliesst.Each of the two sheet metal brackets 61 and 62 thus forms a closed flow path without permanent air gap from the permanent magnet 10 to the flux transition sheet 11, which results in a good flux of the magnetic circuit. This applies both to the flow of the permanent magnet 10 and to the control flow from the winding 2, which passes through the pole plates 8 and 8 'partly through the thin permanent magnet and partly through the narrow sides of the pole plates onto the plate brackets 61 and 62 thence closes over the river transition plate 11 and the anchor 6.

Die Fertigung der Blechbügel 61 und 62 ist sehr einfach, da sie ohne weiteres am Streifen gestanzt werden können. Auch die Montage gestaltet sich ohne Schwierigkeiten; zur Montageerleichterung sind die Endschenkel jeweils abgerundet. Diese Endschenkel sind ausserdem leicht nach innen vorgespannt, so dass sie zur Montage etwas aufgebogen werden müssen und sich dann mit ihrer Vorspannung an die beiden Stirnseiten des Relais anlegen. Das Relais kann dann mit den aufgesteckten Blechbügeln 61 und 62 in einer zusätzlichen Schutzkappe oder ohne Schutzkappe in einer Form vergossen werden.The production of sheet metal brackets 61 and 62 is very simple, since they can easily be punched on the strip. Assembly is also easy; The end legs are rounded off to make installation easier. These end legs are also slightly pretensioned inwards so that they have to be slightly bent open for assembly and then apply their pretension to the two end faces of the relay. The relay can then be cast with the attached sheet metal brackets 61 and 62 in an additional protective cap or without a protective cap in a mold.

Claims (19)

1. Electromagnetic relay with, disposed in an axially continuous aperture (3; 33) in a coil body (1; 31), a tongue-shaped armature (6; 36) which has an attachment end (6a) fixed in the region of a first coil body flange (4; 34), while its free end (6b) is, in the region of the second coil body flange (5; 35), switchable between two pole plates (8, 8'; 38, 38'), a flux transfer plate (11; 41) being constructed at the fixing end of the armature (6; 36), the pole plates (8, 8'; 38, 38') resting flat on the end face of the second coil body flange (5; 35) and being maintained at a preset contact gap by abutment faces on the coil body flange, a sealing foil (9, 12; 39, 42) being disposed on the end faces both of the first coil body flange (4; 34) and also of the second coil body flange (5; 35), characterised in that there is, formed on the end face of the first coil body flange (4; 34) and enclosing the coil body aperture, a marginal bead (17; 47) which is discontinued only at two oppositely disposed places by a respective connecting web (21; 51) extending between armature (6; 36) and flux transfer plate (11; 41), the connecting webs (21; 51) finishing flush with the bead surface, forming therewith a plane surface to carry a sealing foil (12; 43), and in that the bearing surfaces for the pole plates (8, 8'; 38, 38) are formed on the second coil body flange (5; 35) by spacing projections (23; 53) which protrude on two opposite sides of the coil body aperture (3; 33) to a height beyond the end face of the coil body flange (5; 35) which is equivalent to the thickness of the pole plates (8, 8'; 38, 38'), and in that the pole plates (8, 8'; 38, 38') are of substantially flat construction and have in each case an inner edge bearing on both spacing projections (23; 53) and an outer edge braced on a retaining projection (24; 54) provided on the rim of the coil body flange (5; 35), in a manner such that the two pole plates (8, 8'; 38, 38') likewise form with the two spacing projections (24; 54) a plane supporting surface for a sealing foil (9; 39) which engages continuously around the coil body aperture (3; 33).
2. Relay according to Claim 1, characterised in that the gaps formed between the pole plates (8, 8'; 38, 38') on the one hand and the spacing projections (23; 53) on the other are angled in labyrinthine fashion.
3. Relay according to Claim 1 or 2, characterised in that the spacing projections (23; 53) are of T-shaped cross-section.
4. Relay according to one of Claims 1 to 3, characterised in that the pole plates (8, 8'; 38, 38') are in the region between the spacing projections (23; 53) cranked towards the armature and, without making contact, project into the coil body aperture (3a).
5. Relay according to one of Claims 1 to 4, characterised in that the pole plates (8, 8') - apart from their connecting pins (8a, 8a') - are constructed and disposed symmetrically of the coil axis.
6. Relay according to one of Claims 1 to 5, characterised in that the armature (6; 36) has a cut-out (22) at its fixing end (6; 36a) between the two connecting webs (21; 51).
7. Relay according to one of Claims 1 to 6, characterised in that the armature (6; 36) has at its fixing end (6a) lateral lugs (7) which are fixed in grooves (4a) in the coil body and are in addition fixed in widened-out chambers (4b) in the coil body (1) by casting resin.
8. Relay according to one of Claims 1 to 7, characterised in that formed in a coil flange (4) and communicating with the interior (3) of the coil body there is a getter space (18) which has retaining webs (18a) adapted to the contours of a column-shaped getter (19), so that the getter (19) is fixed at its ends while its central portion is free.
9. Relay according to one of Claims 1 to 8, characterised in that a flat four-poled permanent magnet (10; 40) is disposed on the pole plates (8, 8'; 38; 38') and in that a frame-like or bracket-like yoke (34; 43) engages around the relay.
10. Relay according to Oaim 9, characterised in that the yoke (13) consists of two identical sheet metal brackets (13a) which overlap each other in the winding zone and which are rotated through 180° in respect of each other.
11. Relay according to Claim 9, characterised in that the yoke is constructed as a one-piece frame which is formed in the region of the coil winding in order to compensate for tolerances.
12. Relay according to one of Claims 1 to 8, characterised in that the yoke arrangement consists of two U-shaped sheet metal brackets (61, 62) fitted onto the relay in opposite directions, their middle portions (61 a, 62a) extending axially parallel on both sides of the coil (2), the end arms (61 b, 61 c; 62b, 62c) lying above ach other in pairs in front of the two ends of the relay, in respective common planes, the mutually adapted faces of the abutting end arms (61 b, 62c; 61c, 62bl of the two sheet metal brackets (61, 62) jointly and substantially covering the entire end face of the relay.
13. Relay according to Claim 12, characterised in that both sheet metal brackets (61, 62) are of substantially identical construction and are disposed on the relay in such a way that they are rotated through 180° in respect of each other.
14. Relay according to Claim 12 or 13, characterised in that the end arms (61 b, 61c; 62b, 62c) which are substantially half the width of the middle portion (61a, 62a) are formed on one side of the middle part (61 a, 72a) in the bottom portion while on the other side of the middle part they are formed on the upper portion.
15. Relay according to one of Claims 12 to 14, characterised in that the end arms (61 b, 71 c; 62b, 62c) of the yoke bracket members (61, 62) are in each case pretensioned towards the coil body (1).
16. Relay according to one of Claims 1 to 15, characterised in that on all sides it is enclosed by a casting composition (25) which is traversed only by the connecting pins (8a, 8a'; 38, 38a'; 26) and by spacing projections (14) on the coil body (1; 31) which are provided on each outside face.
17. Method of producing a relay according to one of Claims 1 to 16, characterised in that the two pole plates (8, 8') are identical, being cut and bent with connecting lugs (8a, 8a') formed on two opposite sides, after which, according to the envisaged position of fitment, so one of the connecting lugs (8a, 8a') is cut from the strip and the two pole plates (8,8') are rotated through 180° in respect of each other and are fitted onto the second coil body flange (5).
18. Method according to Claim 17, characterised in that the pole plates (8, 8') are in each case cohesively cut from a strip (25) of sheet metal, being connected by a connecting pin (8a, 8a'), and in that the pole plates are obtained in such a way that they can be installed on different sides by different separation (26, 27) of the connecting pins (8a, 8a').
19. Method according to Claim 17 or 18, characterised in that after the coil body (1; 31) has been fitted with the pole plates (8, 8'; 38, 38') and the armature (6; 36), a composite foil is applied by heated stamping tools to the two end faces to serve as a sealing foil (9,12; 39,42) and in that the permanent magnet (10; 40) and the yoke (13; 43) are fitted and in that the relay is cast in a mould.
EP84112526A 1983-10-20 1984-10-17 Electromagnetic relay and method for its manufacture Expired EP0140284B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112526T ATE35748T1 (en) 1983-10-20 1984-10-17 ELECROMAGNETIC RELAY AND METHOD OF PRODUCTION.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19833338208 DE3338208A1 (en) 1983-10-20 1983-10-20 ELECTROMAGNETIC RELAY AND METHOD FOR THE PRODUCTION THEREOF
DE3338208 1983-10-20
DE8411399U 1984-04-11
DE19848411399 DE8411399U1 (en) 1984-04-11 1984-04-11 Electromagnetic relay

Publications (2)

Publication Number Publication Date
EP0140284A1 EP0140284A1 (en) 1985-05-08
EP0140284B1 true EP0140284B1 (en) 1988-07-13

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ID=25815017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112526A Expired EP0140284B1 (en) 1983-10-20 1984-10-17 Electromagnetic relay and method for its manufacture

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EP (1) EP0140284B1 (en)
DE (1) DE3472732D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059754B1 (en) * 2009-06-23 2022-03-09 Panasonic Intellectual Property Management Co., Ltd. Electromagnetic relay

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE445504B (en) * 1984-11-13 1986-06-23 Tocksfors Verkstads Ab RELETUNGENHET
US4672344A (en) * 1985-04-19 1987-06-09 Siemens Aktiengesellschaft Polarized electromagnetic relay
DE3620942A1 (en) * 1986-06-23 1988-01-07 Siemens Ag Electromagnetic relay
DE58905723D1 (en) * 1988-03-25 1993-11-04 Siemens Ag POLARIZED MULTICONTACT ELECTROMAGNETIC RELAY.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH614068A5 (en) * 1977-03-30 1979-10-31 Standard Telephon & Radio Ag Electromagnetic relay
DE2723220C2 (en) * 1977-05-23 1979-08-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Polarized miniature electromagnetic relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059754B1 (en) * 2009-06-23 2022-03-09 Panasonic Intellectual Property Management Co., Ltd. Electromagnetic relay

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DE3472732D1 (en) 1988-08-18
EP0140284A1 (en) 1985-05-08

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