EP0965677A1 - Dispositif de fermeture de porte pour un appareil électro-ménager - Google Patents

Dispositif de fermeture de porte pour un appareil électro-ménager Download PDF

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Publication number
EP0965677A1
EP0965677A1 EP99111297A EP99111297A EP0965677A1 EP 0965677 A1 EP0965677 A1 EP 0965677A1 EP 99111297 A EP99111297 A EP 99111297A EP 99111297 A EP99111297 A EP 99111297A EP 0965677 A1 EP0965677 A1 EP 0965677A1
Authority
EP
European Patent Office
Prior art keywords
locking
door
rest position
locking member
rocker
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.)
Granted
Application number
EP99111297A
Other languages
German (de)
English (en)
Other versions
EP0965677B1 (fr
Inventor
Mario Chioffi
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.)
Bitron SpA
Original Assignee
Bitron SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bitron SpA filed Critical Bitron SpA
Publication of EP0965677A1 publication Critical patent/EP0965677A1/fr
Application granted granted Critical
Publication of EP0965677B1 publication Critical patent/EP0965677B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a locking device for the door of a domestic electrical appliance.
  • the subject of the invention is a locking device which includes
  • Such devices are currently used for washing machines or washer-dryers.
  • Safety regulations demand that the door of a washing machine or washer-dryer cannot be opened in certain conditions, for example when the drum is moving and/or when the level of water in the washing compartment is over a predetermined spill level.
  • Some devices are made in such a way that if the door is closed when the machine is unplugged, it cannot be opened unless the machine is connected to the electricity supply. Such devices involve problems, for example when demonstrating the machines to the public in showrooms, where domestic appliances on display are not usually connected to the electricity supply.
  • washing machines have a system for manually unlocking the door, by means, for example, of a release cable accessible in the water intake compartment.
  • This arrangement solves the problem of not being able to open the door with the machine unplugged, for example in a show room, but creates new safety problems since, by operating the release cable, the user could manage to open the door of the machine during a wash cycle.
  • the object of the present invention is to provide a locking device for the door of a domestic electrical appliance that allows a user to open the door quickly, that is without having to wait, at any time he may want to, except during an operating cycle during which safety regulations demand that the door must not able to be opened.
  • a device according to the invention is generally indicated 1.
  • This device includes a support casing 2 for fixing to the structure S ( Figure 1) of a domestic electrical appliance, near a loading or access opening O of the machine, which has an associated door P having a hook member A.
  • the structure S of the machine Adjacent the opening O, the structure S of the machine has an aperture Q (Figure 1) for the passage and engagement of the hook member A when the door P is closed ( Figure 5).
  • the aperture Q is big enough to allow the member A to be inserted and also to be rotated so as to be disengaged when the door P is opened ( Figure 12).
  • the casing 2 of the device 1 has an aperture 3 facing the aperture Q ( Figure 1) for inserting the hook member A.
  • a retaining member or slider 4 is slidably mounted inside the casing 2 of the device, with an aperture or window 5 corresponding substantially with the aperture 3 of the casing.
  • the window 5 is engageable by the end of the clasp element A when the door P is closed ( Figure 5).
  • a spring 6 (Figure 3) is associated with the slider 4 in a manner known per se and tends to urge it into the position shown in Figures 1 and 2.
  • an electromechanical control device 7 of a known type, is arranged inside the casing 2.
  • This device 7 includes a bimetal strip 8, of configuration known per se, with one end securely fixed to the support casing 2 at 9. The other end of the bimetal strip bears a contact 10 facing a contact member 11 fixed to the casing 2.
  • a resistive heating element 12 such as a positive-temperature coefficient (PTC) resistor, is associated with the bimetal strip 8 in a known manner.
  • PTC positive-temperature coefficient
  • the bimetal strip 8 assumes the configuration shown in Figure 3, in which it keeps the movable contact 10 separate from the fixed contact 11 and the locking element 13 is in a rest position, withdrawn inside the casing 2.
  • the bimetal strip 8 changes configuration, carrying the movable contact 10 into engagement with the contact 11 and tending to push the locking member 13 into an obstruction position in which it partially protrudes out of the casing 2 so as to cooperate functionally with the retaining slider 4 in a way which will be explained in detail later.
  • the retaining slider 4 is mounted for movement relative to the support casing 2 between a rest position, shown in Figures 1, 2 and 12, 13, in which it allows the hook member A to engage the window 5 when the door P is closed and to disengage therefrom when the door is opened.
  • the retaining slider 4 has a lateral projection 4a.
  • the projection 4a contacts the end of the locking member 13.
  • the retaining slider 4 is movable into a working position, shown in figures 5 and 6, in which is holds the hook member A in the condition closing the door P. In this position, the projection 4a of the slider 4 uncovers the locking member 13, as shown most clearly in Figure 6, enabling it to move into the projecting position under the control of the bimetal strip 8, when this latter is heated by the resistor 10 ( Figures 9 to 11).
  • An unlocking device associated with the locking device 13, is generally indicated 15 in Figure 2.
  • the unlocking device 15 includes a rocker 16 pivoted at 17 on the support casing about an axis substantially parallel to the direction of movement of the locking member 13.
  • the rocker 16 has an arm 16a extending near the path of the locking member 13 and an opposite arm 16b.
  • the end of the arm 16a of the rocker 16 extends beneath a resilient flap 18 fixed to the support casing.
  • this flap (see Figure 4 in particular) has a plurality of slits 18a giving it the substantial appearance of a comb.
  • the end of the arm 16a thereof slides against the flap 18 which offers some frictional resistance.
  • the flap 18, which presses on the end of the said arm of the rocker, also helps to ensure that the rocker pivots only about the pivotal axis 17.
  • an electrically-controlled actuator 19 is arranged in the casing 2 near the end of the arm 16b of the rocker 16.
  • this actuator includes a solenoid 20 with a movable member 21, constituted at least in part of ferromagnetic material, mounted therein.
  • the movable member 21 has a terminal pin 22 extending near to the end of the arm 16b of the rocker 16.
  • the movable member 21-22 of the actuator device 19 is in the position shown in Figure 2 and the rocker 16 is positioned whereby the end of the arm 16a does not interfere with the path of movement of the locking device 13.
  • the position of the rocker 16 is stabilised by the resilient flap 18.
  • the top of the locking member 13 is bevelled to form an inclined plane 13a.
  • the end of the arm 16a of the rocker 16 is correspondingly bevelled underneath to form an inclined plane 16c.
  • the movable contact 10 carried by the plate 8 and the fixed contact 11 constitute together a switch arranged in series in an electric line supplying the domestic electrical appliance.
  • the solenoid 20 of the actuator 19 can be connected to this electric line, downstream of the switch constituted by the contacts 10 and 11.
  • a control unit (not illustrated) thereof causes current to flow to the resistor 12, thereby heating and commutating the bimetal strip 8 which thus changes to the configuration shown in Figure 7.
  • the movable contact 10 is made to engage the fixed contact 11 and the locking member 13 is moved into its partially projecting position in which it prevents the slider 4 from resuming its rest position of Figure 1, by blocking the path of the projection 4a of the said slider 4. In this condition, the door P cannot be opened.
  • the movable core 21-22 moves into the position shown in Figure 9, causing the rocker 16 to rotate.
  • the end of the arm 16a of the rocker 16 engages the inclined plane 13a of the locking member 13 with its own inclined plane 16a, causing the locking member to return to its withdrawn position ( Figures 10 and 11).
  • the solenoid 20 of the actuator device 19 can be activated by a control impulse from the control unit of the domestic appliance, as a result of the user pressing a control button to open the door P.
  • the control unit only activates the said solenoid if the safety conditions for allowing the door P to be opened are fulfilled at that moment.
  • the projection 4a of the slider 4 partially overlaps the locking member 13 before this latter is disengaged by the arm 16a of the rocker 16, whereby the cursor 4 is able to continue on its path until it reaches its rest position ( Figures 12 to 14). Once it has reached this condition, the hook member A of the door P can be disengaged from the retaining slider 4, and the window Q, and the door P can be opened.
  • the door P can be unlocked and opened during operation extremely quickly, without any annoying waiting time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Lock And Its Accessories (AREA)
  • Electric Ovens (AREA)
EP99111297A 1998-06-11 1999-06-10 Dispositif de fermeture de porte pour un appareil électro-ménager Expired - Lifetime EP0965677B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO980511 1998-06-11
IT98TO000511A ITTO980511A1 (it) 1998-06-11 1998-06-11 Dispositivo di bloccaggio di un portello di un apparecchio elettrodome stico.

Publications (2)

Publication Number Publication Date
EP0965677A1 true EP0965677A1 (fr) 1999-12-22
EP0965677B1 EP0965677B1 (fr) 2003-04-09

Family

ID=11416840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111297A Expired - Lifetime EP0965677B1 (fr) 1998-06-11 1999-06-10 Dispositif de fermeture de porte pour un appareil électro-ménager

Country Status (3)

Country Link
EP (1) EP0965677B1 (fr)
DE (1) DE69906623T2 (fr)
IT (1) ITTO980511A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2364350A (en) * 2000-06-30 2002-01-23 Bitron Spa Door locking device
FR2812678A1 (fr) 2000-08-07 2002-02-08 Zangenstein Elektro Verrouillage pour la porte d'un appareil electromenager
EP1467048A1 (fr) * 2003-04-09 2004-10-13 BITRON S.p.A. Dispositif de verrouillage pour des appareils électroménagers
US6840553B2 (en) 2000-12-22 2005-01-11 Elektromanufaktur Zangenstein Hanauer Gmbh & Co Kgaa Apparatus for blocking and releasing a door lock of an electrical appliance
EP1741378A1 (fr) * 2005-07-08 2007-01-10 BITRON S.p.A. Dispositif de retenue, en particulier pour une porte d'un appareil électrique domestique
EP1544387A3 (fr) * 2003-12-18 2008-05-28 BITRON S.p.A. Serrure de sécurité pour une porte, notamment pour des appareils électroménagers
EP2090690A1 (fr) * 2008-02-18 2009-08-19 Electrolux Home Products Corporation N.V. Dispositif de verrou de porte doté de protection thermique et procédé pour la protection thermique d'un dispositif de verrou de porte dans un appareil domestique
US7585006B2 (en) * 2004-07-13 2009-09-08 C.R.F. Societa Consortile Per Azioni Household appliance, namely a machine for washing and/or drying laundry, with a door block/release device that can be actuated electrically
WO2010000626A1 (fr) 2008-06-30 2010-01-07 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de fermeture de porte pour un appareil ménager, système de porte avec un dispositif de fermeture de porte et procédé de fermeture d’une porte d’un appareil ménager
US7775070B2 (en) * 2004-05-20 2010-08-17 Lg Electronics Inc. Door power interruption safety switch of washing machine and method of operation thereof
EP1988207A3 (fr) * 2007-05-03 2011-06-08 BITRON S.p.A. Système de verrou de porte pour appareil électrique domestique
ITTO20100528A1 (it) * 2010-06-18 2011-12-19 Eltek Spa Dispositivo blocco porta per elettrodomestici con attuatore termico
US20140132013A1 (en) * 2011-06-29 2014-05-15 Bitron S.P.A. Device for locking and unlocking the door of an electric household appliance
RU2584671C2 (ru) * 2012-03-06 2016-05-20 Бсх Хаусгерете Гмбх Бытовой прибор

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2015070A (en) * 1978-02-24 1979-09-05 Omp Off Meccano Plast Door Locking Device
US4620735A (en) * 1984-08-18 1986-11-04 Ellenberger & Poensgen Gmbh Door-bolting device for electrical appliances
EP0359728A2 (fr) * 1988-09-16 1990-03-21 Aktiebolaget Electrolux Dispositif de verrouillage pour porte de machine à laver, essoreuse ou similaire
EP0518147A1 (fr) * 1991-06-13 1992-12-16 Zanussi Elettrodomestici S.p.A. Dispositif de verrouillage de porte pour machines à laver et/ou sécher le linge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1061220B (it) * 1976-03-18 1983-02-28 Texas Instruments Italia Spa Perfezionamento nei dispositivi bloccaporta per lavatrici e simili ad azionamento mediante bimetallo a riscaldamento voltmetrico

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2015070A (en) * 1978-02-24 1979-09-05 Omp Off Meccano Plast Door Locking Device
US4620735A (en) * 1984-08-18 1986-11-04 Ellenberger & Poensgen Gmbh Door-bolting device for electrical appliances
EP0359728A2 (fr) * 1988-09-16 1990-03-21 Aktiebolaget Electrolux Dispositif de verrouillage pour porte de machine à laver, essoreuse ou similaire
EP0518147A1 (fr) * 1991-06-13 1992-12-16 Zanussi Elettrodomestici S.p.A. Dispositif de verrouillage de porte pour machines à laver et/ou sécher le linge

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2364350A (en) * 2000-06-30 2002-01-23 Bitron Spa Door locking device
GB2364350B (en) * 2000-06-30 2003-12-31 Bitron Spa Door-locking device
ES2199025A1 (es) * 2000-06-30 2004-02-01 Bitron Spa Dispositivo de bloqueo de puertas, en particular para un aparato electrodomestico.
FR2812678A1 (fr) 2000-08-07 2002-02-08 Zangenstein Elektro Verrouillage pour la porte d'un appareil electromenager
DE10038376C2 (de) * 2000-08-07 2003-04-30 Zangenstein Elektro Türverriegelung für die Tür eines elektrischen Haushaltsgerätes
US6634684B2 (en) 2000-08-07 2003-10-21 Elektromanufaktur Zangenstein Hanauer Gmbh & Co. Kgaa Latching mechanism for the door of an electric household appliance
US6840553B2 (en) 2000-12-22 2005-01-11 Elektromanufaktur Zangenstein Hanauer Gmbh & Co Kgaa Apparatus for blocking and releasing a door lock of an electrical appliance
EP1467048A1 (fr) * 2003-04-09 2004-10-13 BITRON S.p.A. Dispositif de verrouillage pour des appareils électroménagers
EP1544387A3 (fr) * 2003-12-18 2008-05-28 BITRON S.p.A. Serrure de sécurité pour une porte, notamment pour des appareils électroménagers
US7775070B2 (en) * 2004-05-20 2010-08-17 Lg Electronics Inc. Door power interruption safety switch of washing machine and method of operation thereof
US7585006B2 (en) * 2004-07-13 2009-09-08 C.R.F. Societa Consortile Per Azioni Household appliance, namely a machine for washing and/or drying laundry, with a door block/release device that can be actuated electrically
EP1741378A1 (fr) * 2005-07-08 2007-01-10 BITRON S.p.A. Dispositif de retenue, en particulier pour une porte d'un appareil électrique domestique
EP1988207A3 (fr) * 2007-05-03 2011-06-08 BITRON S.p.A. Système de verrou de porte pour appareil électrique domestique
EP2090690A1 (fr) * 2008-02-18 2009-08-19 Electrolux Home Products Corporation N.V. Dispositif de verrou de porte doté de protection thermique et procédé pour la protection thermique d'un dispositif de verrou de porte dans un appareil domestique
WO2009103331A1 (fr) * 2008-02-18 2009-08-27 Electrolux Home Products Corporation N.V. Dispositif de verrouillage de porte avec protection thermique et procédé de protection thermique d'un dispositif de verrouillage de porte dans un appareil électroménager
EA020702B1 (ru) * 2008-06-30 2015-01-30 Бсх Бош Унд Сименс Хаусгерете Гмбх Дверь бытового прибора и способ её запирания
CN102076902B (zh) * 2008-06-30 2014-05-07 Bsh博世和西门子家用器具有限公司 用于家用器具的门锁定装置、包括门锁定装置的门结构以及用于锁定家用器具的门的方法
WO2010000626A1 (fr) 2008-06-30 2010-01-07 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de fermeture de porte pour un appareil ménager, système de porte avec un dispositif de fermeture de porte et procédé de fermeture d’une porte d’un appareil ménager
US9217217B2 (en) 2008-06-30 2015-12-22 BSH Hausgeräte GmbH Door-locking device for a household appliance, door arrangement comprising a door-locking device and method for locking a door of a household appliance
ITTO20100528A1 (it) * 2010-06-18 2011-12-19 Eltek Spa Dispositivo blocco porta per elettrodomestici con attuatore termico
EP2397626A1 (fr) 2010-06-18 2011-12-21 Eltek S.P.A. Dispositif de verrouillage de porte avec un thermo-actionneur pour appareils ménagers
US9127482B2 (en) 2010-06-18 2015-09-08 Eltek S.P.A. Door lock device with thermoactuator for household appliances
US20140132013A1 (en) * 2011-06-29 2014-05-15 Bitron S.P.A. Device for locking and unlocking the door of an electric household appliance
US9605371B2 (en) * 2011-06-29 2017-03-28 Bitron S.P.A. Device for locking and unlocking the door of an electric household appliance
RU2584671C2 (ru) * 2012-03-06 2016-05-20 Бсх Хаусгерете Гмбх Бытовой прибор

Also Published As

Publication number Publication date
DE69906623T2 (de) 2004-02-12
EP0965677B1 (fr) 2003-04-09
ITTO980511A1 (it) 1999-12-13
DE69906623D1 (de) 2003-05-15

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