EP0172331B1 - Door-locking device for instant locking and delayed unlocking with water level supervision - Google Patents

Door-locking device for instant locking and delayed unlocking with water level supervision Download PDF

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Publication number
EP0172331B1
EP0172331B1 EP85106984A EP85106984A EP0172331B1 EP 0172331 B1 EP0172331 B1 EP 0172331B1 EP 85106984 A EP85106984 A EP 85106984A EP 85106984 A EP85106984 A EP 85106984A EP 0172331 B1 EP0172331 B1 EP 0172331B1
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EP
European Patent Office
Prior art keywords
locking
mechanism according
contact
locking slide
push rod
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
EP85106984A
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German (de)
French (fr)
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EP0172331A1 (en
Inventor
Konrad Heydner
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.)
Ellenberger and Poensgen GmbH
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Ellenberger and Poensgen GmbH
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Publication date
Application filed by Ellenberger and Poensgen GmbH filed Critical Ellenberger and Poensgen GmbH
Publication of EP0172331A1 publication Critical patent/EP0172331A1/en
Application granted granted Critical
Publication of EP0172331B1 publication Critical patent/EP0172331B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B47/0009—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with thermo-electric actuators, e.g. heated bimetals
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/69—Washing machine or stove closure latch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S70/00—Locks
    • Y10S70/48—Fluid pressure lock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/1014—Operating means
    • Y10T292/1021—Motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7051—Using a powered device [e.g., motor]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7051—Using a powered device [e.g., motor]
    • Y10T70/7062—Electrical type [e.g., solenoid]

Definitions

  • the invention relates to a door locking device for electrical devices, in particular for washing machines, of the type mentioned in the preamble of claim 1.
  • Such devices are known, inter alia, from DE-3 214 436 (EP-A-0 092 162). They are bimetallic devices with the property of locking the door of an electrical device with a delay as well as unlocking it with a delay. Simultaneous water level monitoring when using these conventional door locking devices, for example in washing machines, is not provided.
  • the invention has for its object to provide a door locking device for electrical appliances, especially for washing machines, which ensures immediate locking and a delayed unlocking of the appliance door with simultaneous water level monitoring. This object is achieved in accordance with the characterizing features of claim 1.
  • a contact spring engages in the latching recess of the locking slide which is parallel to its passage openings and which forms a signal contact together with a fixed contact piece located opposite one another.
  • this contact spring disengages from the latching recess and closes the signal contact due to its spatial displacement.
  • current flows through the coil of an electromagnetic locking relay directly or via a program control, whereby the locking arm of the magnet armature lever is attracted.
  • a locking plunger is mounted which, through the movement of the magnet armature lever, engages through a passage opening in the locking slide to prevent movement. This ensures that the door locking device according to the invention is locked without delay.
  • the second contact arm of the magnet armature lever - hereinafter referred to as the main contact arm - is a bearing for a connecting piece which completely fills the through opening of a pressure chamber and is thereby guided in a longitudinally displaceable manner and is fastened to a membrane which divides the pressure chamber volume.
  • the diaphragm-side end of the connecting piece increasingly acts on a contact spring against its spring force.
  • the contact spring forms the main contact point, which can thus be closed by the locking movement and consequently also switches on the electrical device virtually without delay.
  • the membrane attached to the opposite side of the connecting piece divides the pressure chamber, which is connected to a pressure compensation chamber via a passage channel.
  • the pressure compensation chamber has a connection channel leading to the outside, whereby it e.g. can be filled with water. Due to this design, the door locking device ensures a delayed unlocking with water level monitoring. If the electrical device is switched off, the locking relay no longer pulls the armature lever. The restoring force of the main contact spring causes the unlocking movement, which is, however, delayed by the counterpressure on the membrane which forms in the pressure chamber. The delay time can be determined using the special design of the membrane and pressure chamber system. In this way, for example, the drum outlet on a washing machine can be protected against premature external access. Due to the design of the pressure chamber system according to the characterizing feature of claim 1, water level monitoring is also possible, for example in a washing machine, spin dryer, dishwasher or the like.
  • the lever-side space of the pressure chamber is filled with water via the passage channel, the pressure compensation chamber and the connection channel. Since a liquid in a pressure chamber develops a significantly higher back pressure than a gas, the door locking device can only be unlocked very slowly or not at all. As a result, the door of the electrical device can only be opened when the water level has fallen below a certain level and the pressure chamber has been emptied via the passage channel, pressure compensation chamber and outlet channel. The emptying time can be determined via the length and cross-sectional area of the passage. This configuration of the door locking device prevents water from leaking out of washing machines, for example, by opening the appliance door prematurely.
  • the pressure spring which acts increasingly on the main contact arm of the magnet armature lever during the locking process in accordance with the characterizing feature of claim 6 supports the restoring force of the contact spring. Due to the adjustment possibility of this compression spring described in the characterizing feature of claim 7, a simple adjustment of the restoring force and thus the desired delay time for the unlocking is possible.
  • the door locking device can thus be easily and quickly adapted to the conditions required for the practical use of the electrical device.
  • the stiffening plates described in the characterizing feature of claim 8 ensure that the membrane is securely fastened to the connecting piece. In addition, the membrane is inherently more stable and its damage due to tearing or bursting is avoided.
  • claim 10 enable the door locking device to be used both for doors with "left-hand” and doors with “right-closing” door locking hooks.
  • the door locking device for electrical appliances contains a locking slide 3 which is mounted in a longitudinally displaceable manner in a guide groove 1 in the housing 2 and which is provided with a plurality of passage openings and a latching recess 4, the boundary surfaces of which form an obtuse angle to one another.
  • the door locking hook 6 passes through a passage opening as the closing opening 5 according to FIG. 2, which blocks the appliance door by engaging behind the housing wall 2.
  • the locking plunger 8 passes through one of the two locking openings 9 to prevent movement.
  • an extension of the guide groove 1 forming a free space 1 ' is provided behind the locking slide 3 in the open position of the device, the length of the free space being at least half Distance of the centers of the passage openings corresponds.
  • the locking openings 9 lie on both sides of the guide groove 10 receiving the locking plunger 8.
  • the guide groove 10 for the locking plunger 8 has an extension 11. In the open position (FIG. 1) of the door locking device, the L-shaped free end 12 of the contact spring 13 engages in the latching recess 4. This forms the signal contact 15 together with the parallel opposing fixed contact piece 14.
  • the L-shaped contact spring free end 12 whose horizontal leg resembles a negative of the shape of the latching recess 4, disengages from the latching recess 4, thereby becoming in the direction of Fixed contact piece 14 against the restoring force of the contact spring 13, whereby the signal contact 15 can be closed (Fig. 2).
  • This signal contact controls a locking relay 16 located to the side of locking slide 3, which is composed of magnetic yoke 17, coil 18, core 19 and double-armature armature lever 20.
  • This magnet armature lever 20 is located laterally next to the pole face 21 of the magnet and consists of a locking arm 22 and a main contact arm 23.
  • the free end of the locking arm 22 passes through the locking plunger 8, which is displaced along the guide groove 10 by the pivoting movement of the magnet armature lever 20 during locking.
  • the free end of the main contact arm 23 is a bearing for the connecting piece 24, which passes through the passage opening 25 of the pressure chamber cover 26 and is thereby longitudinally displaceable.
  • the end of the connecting piece 24 lying in the pressure chamber is fastened via stiffening plates 27 to a membrane 28 which divides the pressure chamber 29 into two volumes.
  • This pressure chamber is connected to the washing drum space via a passage channel 30, a pressure compensation chamber 31 and a connection channel 32, for example in a washing machine. As explained in the description, this makes it possible to monitor the water level in electrical appliances in which water is used.
  • the end of the connecting piece 24 on the diaphragm side increasingly applies a contact spring 33 during the locking, which together with a fixed contact piece 34 located opposite one another forms the main contact point 35.
  • the contact spring 33 In the locked position (FIG. 2), the contact spring 33 is spatially displaced by the action and the main contact point 35 is closed. The connected electrical device is then put into operation.
  • the magnet armature lever 20 is rotatably mounted on the housing part 36, which comprises the magnet coil 18 on the side opposite the locking plunger 8. Together with the obtuse angle 37, which form the locking arm 22 and the main contact arm 23 to one another, this arrangement provides sufficient working paths for locking pushes I8 and connecting piece 24, as well as a clean magnetic connection between the magnetic yoke 17, core 19 and magnetic armature lever 20 (FIG. 2 ).
  • the main contact arm 23 of the magnet armature lever 20 is acted upon on the side opposite the locking relay 16 by a compression spring 38 which is placed on an adjusting screw 39 inserted in a housing part 40.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Description

Die Erfindung betrifft eine Türverriegelungsvorrichtung für Elektrogeräte, insbesondere für Waschmaschinen, der im Oberbegriff des Anspruches 1 genannten Art. Solche Vorrichtungen sind unter anderem aus DE-3 214 436 (EP-A-0 092 162) bekannt. Sie sind bimetallgesteuerte Geräte mit der Eigenschaft, die Tür eines Elektrogerätes sowohl verzögert zu verriegeln, als auch verzögert zu entriegeln. Eine gleichzeitige Wasserstandsüberwachung beim Einsatz dieser herkömmlichen Türverriegelungsvorrichtungen beispielsweise in Waschmaschinen ist dabei nicht vorgesehen.The invention relates to a door locking device for electrical devices, in particular for washing machines, of the type mentioned in the preamble of claim 1. Such devices are known, inter alia, from DE-3 214 436 (EP-A-0 092 162). They are bimetallic devices with the property of locking the door of an electrical device with a delay as well as unlocking it with a delay. Simultaneous water level monitoring when using these conventional door locking devices, for example in washing machines, is not provided.

Der Erfindung liegt die Aufgabe zugrunde, eine Türverriegelungsvorrichtung für Elektrogeräte, insbesondere für Waschmaschinen, zu schaffen, die eine sofortige Verriegelung und eine verzögerte Entriegelung der Gerätetür mit gleichzeitiger Wasserstandsüberwachung gewährleistet. Diese Aufgabe wird gemäss den kennzeichnenden Merkmalen des Anspruches 1 gelöst.The invention has for its object to provide a door locking device for electrical appliances, especially for washing machines, which ensures immediate locking and a delayed unlocking of the appliance door with simultaneous water level monitoring. This object is achieved in accordance with the characterizing features of claim 1.

In Offenstellung der Verriegelungsvorrichtung greift in die parallel zu seinen Durchtrittsöffnungen liegende Verrastausnehmung des Verriegelungsschiebers eine Kontaktfeder ein, die zusammen mit einem parallel gegenüberliegenden Festkontaktstück einen Signalkontakt bildet. Bei der durch den Türverriegelungshaken gesteuerten Verriegelungsbewegung gelangt diese Kontaktfeder ausser Eingriff mit der Verrastausnehmung und schliesst durch ihre räumliche Verschiebung den Signalkontakt. Dadurch wird die Spule eines elektromagnetischen Verriegelungsrelais direkt oder über eine Programmsteuerung von Strom durchflossen, wodurch der Verriegelungsarm des Magnetankerhebels angezogen wird. Am Freiende des Verriegelungsarmes ist ein Verriegelungsstössel gelagert, der durch die Bewegung des Magnetankerhebels eine Durchtrittsöffnung im Verriegelungsschieber bewegungssperrend durchgreift. Dadurch ist die verzögerungsfreie Verriegelung der erfindungsgemässen Türverriegelungsvorrichtung gewährleistet.In the open position of the locking device, a contact spring engages in the latching recess of the locking slide which is parallel to its passage openings and which forms a signal contact together with a fixed contact piece located opposite one another. When the locking movement is controlled by the door locking hook, this contact spring disengages from the latching recess and closes the signal contact due to its spatial displacement. As a result, current flows through the coil of an electromagnetic locking relay directly or via a program control, whereby the locking arm of the magnet armature lever is attracted. At the free end of the locking arm, a locking plunger is mounted which, through the movement of the magnet armature lever, engages through a passage opening in the locking slide to prevent movement. This ensures that the door locking device according to the invention is locked without delay.

Der zweite Kontaktarm des Magnetankerhebels - im folgenden Hauptkontaktarm genannt - ist Lager für ein die Durchtrittsöffnung einer Druckkammer vollständig ausfüllendes, dadurch geführt längsverschiebbares Verbindungsstück, das an einer das Druckkammervolumen teilenden Membran befestigt ist. Bei der Verriegelung beaufschlagt das membranabseitige Ende des Verbindungsstückes zunehmend eine Kontaktfeder gegen deren Federkraft. Die Kontaktfeder bildet zusammen mit einem Festkontaktstück die Hauptkontaktstelle, die durch die Verriegelungsbewegung damit schliessbar ist und das Elektrogerät demzufolge ebenfalls quasi verzögerungsfrei einschaltet. Die an der gegenüberliegenden Seite des Verbindungsstückes befestigte Membran teilt die Druckkammer, die über einen Durchtrittskanal mit einer Druckausgleichskammer verbunden ist. Die Druckausgleichskammer weist einen nach aussen führenden Anschlusskanal auf, wodurch sie z.B. mit Wasser füllbar ist. Durch diese Baueweise gewährleistet die Türverriegelungsvorrichtung eine verzögerte Entriegelung mit Wasserstandsüberwachung. Wird das Elektrogerät nämlich ausgeschaltet, zieht das Verriegelungsrelais den Magnetankerhebel nicht mehr an. Durch die rückstellende Kraft der Hauptkontaktfeder wird die Entriegelungsbewegung hervorgerufen, die allerdings durch den sich in der Druckkammer ausbildenden Gegendruck auf die Membran verzögert ist. Die Verzögerungszeit ist über die spezielle Bauweise von Membran und Druckkammersystem bestimmbar. Dadurch kann beispielsweise der Trommelauslauf bei einer Waschmaschine gegen vorzeitigen Zugriff von aussen geschützt werden. Durch die dem kennzeichnenden Merkmal des Anspruches 1 gemässe Ausführung des Druckkammersystems ist weiterhin eine Wasserstandsüberwachung beispielsweise bei einer Waschmaschine, Wäscheschleuder, Spülmaschine od. dgl. möglich. Überschreitet der Wasserstand in einem solchen Gerät ein bestimmtes Niveau, ist der hebelseitige Raum der Druckkammer über den Durchtrittskanal, die Durckausgleichskammer und den Anschlusskanal mit Wasser gefüllt. Da eine Flüssigkeit in einer Druckkammer einen wesentlich höheren Gegendruck als ein Gas entwickelt, kann die Türverriegelungsvorrichtung nur noch sehr langsam oder überhaupt nicht mehr entriegelt werden. Dadurch kann die Tür des Elektrogerätes erst geöffnet werden, wenn der Wasserstand ein bestimmtes Niveau unterschritten und sich die Druckkammer über Durchtrittskanal, Druckausgleichskammer und Austrittskanal entleert hat. Die Entleerzeit ist über Länge und Querschnittsfläche des Durchtrittskanals bestimmbar. Durch diese Ausgestaltung der Türverriegelungsvorrichtung wird es verhindert, dass Wasser beispielsweise aus Waschmaschinen durch vorzeitiges Öffnen der Gerätetür ausläuft.The second contact arm of the magnet armature lever - hereinafter referred to as the main contact arm - is a bearing for a connecting piece which completely fills the through opening of a pressure chamber and is thereby guided in a longitudinally displaceable manner and is fastened to a membrane which divides the pressure chamber volume. When locking, the diaphragm-side end of the connecting piece increasingly acts on a contact spring against its spring force. Together with a fixed contact piece, the contact spring forms the main contact point, which can thus be closed by the locking movement and consequently also switches on the electrical device virtually without delay. The membrane attached to the opposite side of the connecting piece divides the pressure chamber, which is connected to a pressure compensation chamber via a passage channel. The pressure compensation chamber has a connection channel leading to the outside, whereby it e.g. can be filled with water. Due to this design, the door locking device ensures a delayed unlocking with water level monitoring. If the electrical device is switched off, the locking relay no longer pulls the armature lever. The restoring force of the main contact spring causes the unlocking movement, which is, however, delayed by the counterpressure on the membrane which forms in the pressure chamber. The delay time can be determined using the special design of the membrane and pressure chamber system. In this way, for example, the drum outlet on a washing machine can be protected against premature external access. Due to the design of the pressure chamber system according to the characterizing feature of claim 1, water level monitoring is also possible, for example in a washing machine, spin dryer, dishwasher or the like. If the water level in such a device exceeds a certain level, the lever-side space of the pressure chamber is filled with water via the passage channel, the pressure compensation chamber and the connection channel. Since a liquid in a pressure chamber develops a significantly higher back pressure than a gas, the door locking device can only be unlocked very slowly or not at all. As a result, the door of the electrical device can only be opened when the water level has fallen below a certain level and the pressure chamber has been emptied via the passage channel, pressure compensation chamber and outlet channel. The emptying time can be determined via the length and cross-sectional area of the passage. This configuration of the door locking device prevents water from leaking out of washing machines, for example, by opening the appliance door prematurely.

Durch die kennzeichnenden Merkmale der Ansprüche 2 und 3 wird ein geringer Abstand des Magnetankerhebels vom Magnetkern bei gleichzeitig ausreichenden Hebelwegen für den Verriegelungsstössel und das Verbindungsstück erreicht, wodurch eine sichere und schnelle Verriegelung gewährleistet ist.Due to the characterizing features of claims 2 and 3, a small distance of the magnet armature lever from the magnet core is achieved with at the same time sufficient lever paths for the locking plunger and the connecting piece, as a result of which a secure and quick locking is ensured.

Trotz der nicht wenigen Bauelemente, die für die Vorrichtung benötigt werden, ist durch die kennzeichnenden Merkmale der Ansprüche 4 und 5 eine schmale, flache Bauweise möglich und ein funktionssicherer Aufbau gewährleistet.Despite the not a few components that are required for the device, the characterizing features of claims 4 and 5 make a narrow, flat design possible and ensure a functionally reliable structure.

Die gemäss dem kennzeichnenden Merkmal des Anspruches 6 den Hauptkontaktarm des Magnetankerhebels beim Verriegelungsvorgang zunehmend beaufschlagende Druckfeder unterstützt die Rückstellkraft der Kontaktfeder. Durch die im kennzeichnenden Merkmal des Anspruches 7 beschriebene Justiermöglichkeit dieser Druckfeder ist ein einfaches Anpassen der Rückstellkraft und damit der gewünschten Verzögerungszeit für die Entriegelung möglich. Damit kann die Türverriegelungsvorrichtung einfach und schnell den erforderlichen Bedingungen für den praktischen Einsatz des Elektrogerätes angepasst werden.The pressure spring which acts increasingly on the main contact arm of the magnet armature lever during the locking process in accordance with the characterizing feature of claim 6 supports the restoring force of the contact spring. Due to the adjustment possibility of this compression spring described in the characterizing feature of claim 7, a simple adjustment of the restoring force and thus the desired delay time for the unlocking is possible. The door locking device can thus be easily and quickly adapted to the conditions required for the practical use of the electrical device.

Durch die im Kennzeichnungsmerkmal des Anspruches 8 beschriebenen Versteifungsplatten ist eine sichere Befestigt der Membran am Verbindungsstück gewährleistet. Ausserdem ist die Membran dadurch in sich stabiler und ihre Beschädigung durch Reissen oder Platzen wird vermieden.The stiffening plates described in the characterizing feature of claim 8 ensure that the membrane is securely fastened to the connecting piece. In addition, the membrane is inherently more stable and its damage due to tearing or bursting is avoided.

Durch das kennzeichnende Merkmal des Anspruches 9 ist ein gewaltsames Öffnen der Gerätetür weitgehend ausgeschlossen, da sich der Verriegelungsstössel beidseitig des Verriegelungsschiebers in den jeweiligen Gehäuseteilen abstützen kann.Due to the characteristic feature of the Anspru ches 9, a violent opening of the appliance door is largely excluded, since the locking plunger can be supported on both sides of the locking slide in the respective housing parts.

Die kennzeichnenden Merkmale des Anspruches 10 ermöglichen einen Einsatz der Türverriegelungsvorrichtung sowohl für Türen mit «links-» als auch Türen mit «rechts-schliessenden» Türverriegelungshaken.The characterizing features of claim 10 enable the door locking device to be used both for doors with "left-hand" and doors with "right-closing" door locking hooks.

Durch die kennzeichnenden Merkmale der Ansprüche 11 und 12 ist eine besonders leichtgängige Betätigung des Verriegelungsschiebers durch den Türverriegelungshaken möglich, wobei gleichzeitig ein lagegenaues Verrasten der Kontaktfeder in Offenstellung gewährleistet ist.Due to the characterizing features of claims 11 and 12, a particularly smooth actuation of the locking slide by the door locking hook is possible, while at the same time a precise locking of the contact spring is ensured in the open position.

Eine erfindungsgemäss ausgestaltete Türverriegelungsvorrichtung ist im folgenden anhand der Figuren in einem Ausführungsbeispiel näher erläutert. Es zeigen:

  • Fig. 1 eine Draufsicht auf eine erfindungsgemässe Türverriegelungsvorrichtung in Offenstellung (in teilweis geschnittener Darstellung),
  • Fig. 2 eine Draufsicht analog Fig. 1 in Verriegelungsstellung.
A door locking device designed according to the invention is explained in more detail below with reference to the figures in an exemplary embodiment. Show it:
  • 1 is a plan view of a door locking device according to the invention in the open position (in a partially sectioned representation),
  • Fig. 2 is a plan view analogous to Fig. 1 in the locked position.

Die Türverriegelungsvorrichtung für Elektrogeräte, insbesondere für Waschmaschinen enthält einen in einer Führungsnut 1 im Gehäuse 2 längsverschiebbar gelagerten Verriegelungsschieber 3, der mit mehreren Durchtrittsöffnungen und einer Verrastausnehmung 4, deren Begrenzungsflächen einen stumpfen Winkel zueinander bilden, versehen ist. Eine Durchtrittsöffnung wird als Schliessöffnung 5 gemäss Fig. 2 vom Türverriegelungshaken 6 durchgriffen, dieser blockiert die Gerätetür, indem er die Gehäusewandung 2 hintergreift. Je nach Verriegelungsrichtung 7 des Türverriegelungshakens 6 durchsetzt der Verriegelungsstössel 8 eine der beiden Verriegelungsöffnungen 9 bewegungssperrend. Für einen Einsatz der Türverriegelungsvorrichtung sowohl für «links-» wie «rechts-schliessende» Türverriegelungshaken analog Pfeilrichtung 7 ist in Offenstellung der Vorrichtung hinter dem Verriegelungsschieber 3 eine einen Freiraum 1' bildende Verlängerung der Führungsnut 1 vorgesehen, wobei die Länge des Freiraums mindestens dem halben Abstand der Zentren der Durchtrittsöffnungen entspricht. Ausserdem liegen in Offenstellung der Vorrichtung die Verriegelungsöffnungen 9 beiderseits der den Verriegelungsstössel 8 aufnehmenden Führungsnut 10. Für eine sichere Blockierung der Verriegelungsvorrichtung weist die Führungsnut 10 für den Verriegelungsstössel 8 eine Verlängerung 11 auf. In Offenstellung (Fig. 1) der Türverriegelungsvorrichtung greift in die Verrastausnehmung 4 das L-förmige Freiende 12 der Kontaktfeder 13 ein. Diese bildet zusammen mit dem parallel gegenüberliegenden Festkontaktstück 14 den Signalkontakt 15. Durch die Verriegelungsbewegung des Verriegelungsschiebers 3 gelangt das als L ausgebildete Kontaktfederfreiende 12, dessen Horizontalschenkel einem Negativ der Form der Verrastausnehmung 4 gleicht, ausser Eingriff mit der Verrastausnehmung 4, wird dadurch in Richtung des Festkontaktstückes 14 gegen die Rückstellkraft der Kontaktfeder 13 beaufschlagt, wodurch der Signalkontakt 15 schliessbar ist (Fig. 2). Durch diesen Signalkontakt wird ein seitlich vom Verriegelungsschieber 3 liegendes Verriegelungsrelais 16 gesteuert, das aus Magnetjoch 17, Spule 18, Kern 19 und dem doppelarmigen Magnetankerhebel 20 zusammengesetzt ist. Dieser Magnetankerhebel 20 liegt seitlich neben der Polfläche 21 des Magneten und besteht aus einem Verriegelungsarm 22 und einem Hauptkontaktarm 23. Das Freiende des Verriegelungsarms 22 durchgreift den Verriegelungsstössel 8, der durch Schwenkbewegung des Magnetankerhebels 20 bei der Verriegelung längs der Führungsnut 10 verschoben wird. Das Freiende des Hauptkontaktarmes 23 ist Lager für das Verbindungsstück 24, das die Durchtrittsöffnung 25 des Druckkammerdeckels 26 durchgreift und dadurch geführt längsverschiebbar ist. Das in der Druckkammer liegende Ende des Verbindungsstückes 24 ist über Versteifungsplatten 27 an einer Membran 28 befestigt, die die Druckkammer 29 in zwei Volumina teilt. Diese Druckkammer ist über einen Durchtrittskanal 30, eine Druckausgleichskammer 31 und einen Anschlusskanal 32 beispielsweise bei einer Waschmaschine mit dem Waschtrommelraum verbunden. Dadurch ist, wie in der Beschreibung erläutert, eine Wasserstandsüberwachung bei Elektrogeräten, bei denen Wasser zum Einsatz kommt, möglich.The door locking device for electrical appliances, in particular for washing machines, contains a locking slide 3 which is mounted in a longitudinally displaceable manner in a guide groove 1 in the housing 2 and which is provided with a plurality of passage openings and a latching recess 4, the boundary surfaces of which form an obtuse angle to one another. The door locking hook 6 passes through a passage opening as the closing opening 5 according to FIG. 2, which blocks the appliance door by engaging behind the housing wall 2. Depending on the locking direction 7 of the door locking hook 6, the locking plunger 8 passes through one of the two locking openings 9 to prevent movement. For use of the door locking device for both "left" and "right closing" door locking hooks analogous to the direction of arrow 7, an extension of the guide groove 1 forming a free space 1 'is provided behind the locking slide 3 in the open position of the device, the length of the free space being at least half Distance of the centers of the passage openings corresponds. In addition, in the open position of the device, the locking openings 9 lie on both sides of the guide groove 10 receiving the locking plunger 8. For a reliable blocking of the locking device, the guide groove 10 for the locking plunger 8 has an extension 11. In the open position (FIG. 1) of the door locking device, the L-shaped free end 12 of the contact spring 13 engages in the latching recess 4. This forms the signal contact 15 together with the parallel opposing fixed contact piece 14. Due to the locking movement of the locking slide 3, the L-shaped contact spring free end 12, whose horizontal leg resembles a negative of the shape of the latching recess 4, disengages from the latching recess 4, thereby becoming in the direction of Fixed contact piece 14 against the restoring force of the contact spring 13, whereby the signal contact 15 can be closed (Fig. 2). This signal contact controls a locking relay 16 located to the side of locking slide 3, which is composed of magnetic yoke 17, coil 18, core 19 and double-armature armature lever 20. This magnet armature lever 20 is located laterally next to the pole face 21 of the magnet and consists of a locking arm 22 and a main contact arm 23. The free end of the locking arm 22 passes through the locking plunger 8, which is displaced along the guide groove 10 by the pivoting movement of the magnet armature lever 20 during locking. The free end of the main contact arm 23 is a bearing for the connecting piece 24, which passes through the passage opening 25 of the pressure chamber cover 26 and is thereby longitudinally displaceable. The end of the connecting piece 24 lying in the pressure chamber is fastened via stiffening plates 27 to a membrane 28 which divides the pressure chamber 29 into two volumes. This pressure chamber is connected to the washing drum space via a passage channel 30, a pressure compensation chamber 31 and a connection channel 32, for example in a washing machine. As explained in the description, this makes it possible to monitor the water level in electrical appliances in which water is used.

Das membranabseitige Ende des Verbindungsstückes 24 beaufschlagt bei der Verriegelung zunehmend eine Kontaktfeder 33, die zusammen mit einem parallel gegenüberliegenden Festkontaktstück 34 die Hauptkontaktstelle 35 bildet. In Verriegelungsstellung (Fig. 2) ist die Kontaktfeder 33 durch die Beaufschlagung räumlich verschoben und die Hauptkontaktstelle 35 geschlossen. Das angeschlossene Elektrogerät ist dadurch in Betrieb genommen.The end of the connecting piece 24 on the diaphragm side increasingly applies a contact spring 33 during the locking, which together with a fixed contact piece 34 located opposite one another forms the main contact point 35. In the locked position (FIG. 2), the contact spring 33 is spatially displaced by the action and the main contact point 35 is closed. The connected electrical device is then put into operation.

Die Längserstreckungen des Verriegelungsschiebers 3, der Kontaktfedern 13, 33, der Membran und des Magnetankerhebels 20 verlaufen im wesentlichen parallel.The longitudinal extensions of the locking slide 3, the contact springs 13, 33, the membrane and the magnet armature lever 20 run essentially parallel.

Der Magnetankerhebel 20 ist drehbar an dem Gehäuseteil 36 gelagert, das die Magnetspule 18 auf der dem Verriegelungsstössel 8 gegenüberliegenden Seite umfasst. Zusammen mit dem stumpfen Winkel 37, den Verriegelungs- 22 und Hauptkontaktarm 23 zueinander bilden, sind durch diese Anordnung sowohl genügende Arbeitswege für VerriegelungsstösseI8 und Verbindungsstück 24, als auch ein sauberer magnetischer Schluss zwischen Magnetjoch 17, Kern 19 und Magnetankerhebel 20 gegeben (Fig. 2).The magnet armature lever 20 is rotatably mounted on the housing part 36, which comprises the magnet coil 18 on the side opposite the locking plunger 8. Together with the obtuse angle 37, which form the locking arm 22 and the main contact arm 23 to one another, this arrangement provides sufficient working paths for locking pushes I8 and connecting piece 24, as well as a clean magnetic connection between the magnetic yoke 17, core 19 and magnetic armature lever 20 (FIG. 2 ).

Der Hauptkontaktarm 23 des Magnetankerhebels 20 wird auf der dem Verriegelungsrelais 16 gegenüberliegenden Seite von einer Druckfeder 38 beaufschlagt, die auf eine in einem Gehäuseteil 40 eingesetzte Justierschraube 39 aufgesetzt ist.The main contact arm 23 of the magnet armature lever 20 is acted upon on the side opposite the locking relay 16 by a compression spring 38 which is placed on an adjusting screw 39 inserted in a housing part 40.

Die Bewegungsrichtungen von Magnetankerhebel 20, Verriegelungsstössel 8, Verriegelungsschieber 3, Verbindungsstück 24 und der beiden Kontaktfedern 13, 33 liegen in einer gemeinsamen Ebene.The directions of movement of the armature lever 20, locking plunger 8, locking slide 3, connecting piece 24 and the two contact springs 13, 33 lie in a common plane.

Claims (12)

1. Door latch mechanism for electric appliances, in particular for washing machines, having a locking slide (3), which is mounted longitudinally displaceably in a guide groove (1) in the housing (2) and having several through-openings, of which one is assigned as closing opening (5) to a door latch hook (6) attached to the door to be locked and through which said door latch hook can engage and at least one other of said through-openings can, as locking opening (9), be passed through, in locking position of the mechanism, by a locking push rod (8), with the effect of blocking movement, the locking slide (3) having a catch recess (4), offset parallel to its through-openings, characterized by the following features:
- in open position of the latch mechanism, a contact spring (13), opposite a fixed contact piece (14), engages in the catch recess (4) and is disengaged from the catch recess (4) by the locking movement of the locking slide (3), whereby in locking position a signal contact (15), formed by fixed contact piece (14) and contact spring (13), can be closed by the spatial displacement of the contact spring (13);
- the latch mechanism includes an interlock relay (16), which can be controlled by the signal contact (15), lies to the side of the locking slide (3) and comprises magnet yoke (17), coil (18), core (19) and a magnet armature lever (20) lying alongside the pole face (21) of the magnet and with a locking arm (22) and a main contact arm (23), the free end of the locking arm (22) being the bearing for the locking push rod (8) displaceably guided in a groove (10) in the housing (2) and the free end of the main contact arm (23) being the bearing for a connecting piece (24), which completely fills the through-opening (25) of a pressure chamber cover (26), is guided through said through-opening longitudinally displaceably and is fixed to a diaphragm (28) dividing the volume of the pressure chamber (29);
- the pressure chamber (29) is connected via a through-passage (30) to a pressure compensation chamber (31), which can be filled with a medium from outside via a connection passage (32);
- on locking, the end of the connecting piece (24) remote from the diaphragm increasingly impinges on a contact spring (33), forming together with a fixed contact piece (34), the main contact point (35), against the spring force of said contact spring, and thereby closes the main contact point (35).
2. Mechanism according to claim 1, characterized in that the magnet armature lever (20) is pivotally mounted on the housing part (36) which comprises the magnet coil (18) and the yoke (17) on the side opposite the locking push rod (8).
3. Mechanism according to claim 2, characterized in that the two arms of the magnet armature lever (20) form an obtuse angle (37) with respect to each other, the point of which faces the interlock relay (16).
4. Mechanism according to at least one of the preceding claims, characterized in that the directions of movement of magnet armature lever (20), locking push rod (8), locking slide (3), connecting piece (24) and the two contact springs (13, 33) lie in a common plane.
5. Mechanism according to at least one of the preceding claims, characterized in that the longitudinal extents of the locking slide (3), of the contact springs (13, 33), of the diaphragm (28) and of the magnet armature lever (20) run substantially parallel.
6. Mechanism according to at least one of the preceding claims, characterized in that, in the locking operation, the main contact arm (23) of the magnet armature lever (20) is increasingly impinged by a compression spring (38) against its pivoting movement.
7. Mechanism according to claim 6, characterized in that the compression spring (38) is disposed on a screw (39) enclosed in a housing part (40), and is thereby adjustable in its restoring force against the main contact arm (23).
8. Mechanism according to at least one of the preceding claims, characterized in that the diaphragm (28) has, in its radially inner region, reinforcing plates (27) which can be fixed on the connecting piece (24).
9. Mechanism according to at least one of the preceding claims, characterized in that the guide groove (10) for the locking push rod (8) is extended beyond the plane of the locking slide (3).
10. Mechanism according to at least one of the preceding claims, characterized in that
- the locking slide (3) has, apart from the closing opening (5) for the door latch hook (6), two through-openings for the locking push rod (8), these locking openings (9) lying at the same distance on either side of the guide groove (10) for the locking push rod (8) when the mechanism is in open position, and
- when the mechanism is in open position, the guide groove (1) for the locking slide (3) leaves a clearance (1') behind the free end of said locking slide, the length of which clearance corresponds at least to half the distance between the centres of the through-openings.
11. Mechanism according to at least one of the preceding claims, characterized in that the limiting surfaces of the catch recess (4) in the locking slide (3) form an obtuse angle with respect to each other.
12. Mechanism according to claim 1, characterized in that the end (12) of the contact spring (13) engaging in the catch recess (4) has the shape of an «L», the horizontal member of which resembles a negative of the shape of the catch recess (4).
EP85106984A 1984-08-18 1985-06-05 Door-locking device for instant locking and delayed unlocking with water level supervision Expired EP0172331B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3430414 1984-08-18
DE19843430414 DE3430414A1 (en) 1984-08-18 1984-08-18 DOOR LOCKING DEVICE WITH IMMEDIATE LOCKING AND DELAYED UNLOCKING WITH WATER LEVEL MONITORING

Publications (2)

Publication Number Publication Date
EP0172331A1 EP0172331A1 (en) 1986-02-26
EP0172331B1 true EP0172331B1 (en) 1988-03-30

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ID=6243344

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Application Number Title Priority Date Filing Date
EP85106984A Expired EP0172331B1 (en) 1984-08-18 1985-06-05 Door-locking device for instant locking and delayed unlocking with water level supervision

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US (1) US4620735A (en)
EP (1) EP0172331B1 (en)
DE (2) DE3430414A1 (en)

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EP0878576B1 (en) * 1997-04-30 2003-07-02 Ellenberger & Poensgen GmbH Door latch device for electric apparatuses
IT1296669B1 (en) * 1997-12-22 1999-07-14 Bitron Spa DEVICE FOR LOCKING AND UNLOCKING A DOOR OF A HOUSEHOLD APPLIANCE.
ITTO980511A1 (en) * 1998-06-11 1999-12-13 Bitron Spa DEVICE FOR LOCKING A DOOR OF A DOMESTIC APPLIANCE.
DE10154850C1 (en) * 2001-11-08 2003-06-18 Ellenberger & Poensgen door lock
FR2865491B1 (en) * 2004-01-28 2006-04-28 Procofi ELECTROMAGNETIC LOCK WITH RETRACTABLE PEN FOR A SWING DOOR
ATE350527T1 (en) * 2004-07-13 2007-01-15 Fiat Ricerche MACHINE FOR WASHING AND/OR DRYING LAUNDRY, HAVING AN ELECTRICALLY OPERATED LOCKING/UNLOCKING DEVICE FOR THE DOOR
US20070200673A1 (en) * 2006-02-13 2007-08-30 Godwin Bryan W Apparatus and Method for Controlling and Monitoring Access to a Storage Container
ITMI20070601A1 (en) * 2007-03-26 2008-09-27 Elettrotecnica Rold Srl LOCKING DEVICE FOR THE WINDOW CLOSING DOOR
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US8925981B2 (en) * 2010-10-15 2015-01-06 II John W. Ray Method and apparatus for locking an elevator or transport system
ITTO20110569A1 (en) * 2011-06-29 2012-12-30 Bitron Spa LOCKING AND UNLOCKING DEVICE OF THE DOOR OF A HOUSEHOLD APPLIANCE
EP2734666B1 (en) * 2011-07-20 2016-01-13 Elettrotecnica Rold Srl Interlock mechanism for the closing door of washing machines or tumble dryers
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DE102016008317B4 (en) * 2016-07-07 2018-10-31 Emz-Hanauer Gmbh & Co. Kgaa Door lock for a household electrical appliance
IT201700039143A1 (en) * 2017-04-10 2018-10-10 Bitron Spa Door locking device, particularly for domestic appliances.
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Also Published As

Publication number Publication date
DE3430414A1 (en) 1986-02-27
EP0172331A1 (en) 1986-02-26
DE3562028D1 (en) 1988-05-05
US4620735A (en) 1986-11-04

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