EP0381022B1 - Türverriegelungsvorrichtung für eine Waschmaschine oder einen Wäschetrockner - Google Patents

Türverriegelungsvorrichtung für eine Waschmaschine oder einen Wäschetrockner Download PDF

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Publication number
EP0381022B1
EP0381022B1 EP90101353A EP90101353A EP0381022B1 EP 0381022 B1 EP0381022 B1 EP 0381022B1 EP 90101353 A EP90101353 A EP 90101353A EP 90101353 A EP90101353 A EP 90101353A EP 0381022 B1 EP0381022 B1 EP 0381022B1
Authority
EP
European Patent Office
Prior art keywords
door
bimetallic element
washing
electric contact
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90101353A
Other languages
English (en)
French (fr)
Other versions
EP0381022A1 (de
Inventor
Maurizio Mori
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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Filing date
Publication date
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT90101353T priority Critical patent/ATE83274T1/de
Publication of EP0381022A1 publication Critical patent/EP0381022A1/de
Application granted granted Critical
Publication of EP0381022B1 publication Critical patent/EP0381022B1/de
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 door locking means for a washing and/or drying machine for laundry, that is adapted to signal to the user the locked door state when the machine is in operation or out of operation.
  • a door locking means adapted to keep the door locked for the entire duration of the washing and/or drying cycle selected, thereby preventing the door from being opened accidentally during the run of the cycle, which could damage the user due to the elevated temperature within the machine and/or the rotation of the drum.
  • Door locking means of various kinds are known which comprise an electromechanical actuator, such as a bimetallic element, a relay or a similar element, subject to the programmer-timer of the machine and provided with a pin interacting with the lock of the door, said actuator being adapted to be driven into two different operating positions by said programmer-timer, namely a first position in which the actuator is idle and moves the pin into a position of rest in which the latter does not interfere with the lock of the door, thereby allowing the door to be opened or closed, and a second position in which the actuator is activated and moves the pin into a working position in which the latter interferes with the lock, thereby preventing the door from being moved.
  • an electromechanical actuator such as a bimetallic element, a relay or a similar element
  • Such locking means furthermore comprise a conventional delay element associated with the electromechanical actuator and calibrated to activate the latter after a predetermined delay time following the end of the last spinning and/or drying phase of the selected cycle, allowing the door of the machine to be opened when the drum has stopped and therefore eliminating any danger of injury for the user in contact with the drum.
  • the operating states in which the door is locked or unlocked are signaled by means of a suitable warning means of the optical type (e.g. a warning light) or the acoustic type (e.g. a buzzer) connected with the electromechanical actuator within the electric circuit of the locking means, the warning means being adapted to be switched on and off by the general switch or by that of the programmer-timer of the machine when the door is locked and unlocked respectively.
  • a suitable warning means of the optical type e.g. a warning light
  • the acoustic type e.g. a buzzer
  • the locking means of this design although they operate reliably and ensure efficient signaling of the locked or unlocked door states during the run of the washing and/or drying cycles selected, are not capable of correctly signaling such states in cases in which the user interrupts the cycle before the end of the cycle, for example to be able to introduce laundry into the drum or withdraw it therefrom.
  • a control circuit for a washing machine is disclosed in the publication DE-A-30 03 895.
  • it contains a microprocessor controlling the rotation number of the motor.
  • the signals given by the microprocessor are also used for the drive of a door-closing mechanism which protects the operator during the washing procedure.
  • Document GB-A-2 128 283 is concerned with a safety locking device for delate opening of a washing machine which uses a heated bimetal-contact driving the opening mechanism.
  • the invention is based on the problem of eliminating the above mentioned disadvantage by using a locking means adapted to signal the operating state of the door correctly, even in the case of any interruptions of the washing and/or drying cycle for the reasons specified above.
  • FIG. 1 shows the electric circuit components of a means for locking the door of a washing and/or drying machine for laundry, adapted to prevent the door from being opened during the run of each washing and/or drying cycle selected in order to avoid injury to the user due to the elevated temperature within the machine and/or the rotation of the drum of the machine.
  • This locking means comprises substantially a conventional programmer-timer 1 for controlling the switch-on and switch-off of the various electric components (not shown) of the machine during the run of the washing and/or drying cycle, said programmer-timer 1 being connected in parallel with main conductors 2 and 3 of the electric circuit of the machine, which are in turn fed by the electric mains via general switch 4 of the machine.
  • the means in question also comprises a conventional bimetallic element 5 associated with a positive temperature coefficient resistor (PTC) and connected before programmer-timer 1 and disposed in parallel to main conductors 2 and 3, via an electric contact 6 adapted to be activated by said programmer-timer, said bimetallic element being provided with an electric contact 7 of the normally open type, whose closing (when the PTC is fed) effects the feeding of all the electric components of the machine, and whose opening, which takes place when the PTC is deenergized, occurs after a predetermined delay time, due to the inertia of the bimetallic element.
  • PTC positive temperature coefficient resistor
  • Bimetallic element 5 is furthermore associated both with an electric contact 8 of the normally open type, adapted to be activated simultaneously with the other contact 7 and connected in parallel between main feed conductors 9 and 10, before general switch 4, and to be closed on a suitable warning means such as a warning light 11, an acoustic buzzer or the like situated in the control panel of the machine, and with a pin 12 interacting with lock 13 of the door so as to allow for the latter to be opened or closed when the PTC is deenergized, and to prevent the door from being opened from its closed position when the PTC is alive.
  • a suitable warning means such as a warning light 11, an acoustic buzzer or the like situated in the control panel of the machine, and with a pin 12 interacting with lock 13 of the door so as to allow for the latter to be opened or closed when the PTC is deenergized, and to prevent the door from being opened from its closed position when the PTC is alive.
  • said programmer-timer closes electric contact 6 on the PTC of bimetallic element 5, thereby causing rapid heating and thermal deformation of the element, which closes electric contacts 7 and 8 and moves pin 12 into a position so as to prevent the activation of lock 13 and thus the opening of the door of the machine.
  • programmer-timer 1 controls the various electric components of the machine and thus the run of the washing or drying cycle selected due to the closing of electric contact 7, this state being signaled by the lighting up of warning light 11 due to the closing of electric contact 8.
  • programmer-timer 1 opens electric contact 6, in which state the PTC of bimetallic element 5 is deenergized and keeps both electric contacts 7 and 8 temporarily closed, and pin 12 in a position so as to lock the door assuming that the predetermined delay time for the opening of contact 7 is not yet past.
  • warning light 11 also remains temporarily switched on, thus signaling this state in which the door is temporarily locked, and preventing the user from erroneously activating the lock of the door and possibly damaging the lock and/or the door.
  • bimetallic element 5 simultaneously moves also electric contact 8 into the open position, thereby turning off warning light 11 and returning pin 12 to the position in which the door is unlocked, thus signaling this unlocked door state to the user and the possibility of opening the door.
  • the locking means according to the invention also makes it possible to signal to the user the exact locked or unlocked state of the door of the machine, so as to obtain the same advantages as described above.
  • warning light 11 remains temporarily switched on, in the ways described, as long as the door is still locked. As soon as the door is unlocked the warning light is immediately switched off by the opening of electric contact 8, thus signaling this state to the user.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (2)

  1. Türverriegelungsvorrichtung für eine Waschmaschine und/oder einen Wäschetrockner, die umfaßt:
    einen Programm-Zeitgeber (1), der von der elektrischen Stromversorgungsleitung über mindestens einen Hauptschalter (4) versorgt wird und der das Einschalten und das Ausschalten der verschiedenen elektrischen Komponenten der Maschine steuert, und
    ferner mindestens ein Bimetallelement (5), das mit einem herkömmlichen PTC verbunden und an den Programm-Zeitgeber angeschlossen ist und über einen Kontakt (6) des Programm-Zeitgebers (1) ein- und ausgeschaltet wird, wobei das Bimetallelement (5) mit mindestens einem elektrischen Kontakt (7) versehen ist, der zu den elektrischen Komponenten geschlossen wird, wenn der PTC des Bimetallelements (5) eingeschaltet ist, und der mit einer bestimmten Verzögerungszeit entsprechend der Trägheit des Bimetallelements (5) geöffnet wird, wenn der PTC des Bimetallelements (5) ausgeschaltet ist, und wobei
    das Bimetallelement (5) ferner mit einem Stift (12) verbunden ist, der mit der Verriegelung (13) der Tür derart zusammenwirkt, daß die Tür jeweils entsprechend verriegelt und entriegelt wird, wenn der elektrische Kontakt (7) des Bimetallelements geschlossen und geöffnet wird,
    wobei die Verriegelungsvorrichtung weiterhin mindestens eine optische oder akustische Warneinrichtung (11) herkömmlicher Bauart zur Signalisierung des verriegelten oder unverriegelten Zustands der Tür enthält, dadurch gekennzeichnet, daß
    das Bimetallelement (5) mit mindestens einem weiteren elektischen Kontakt (8) gekoppelt ist, der vor dem Hauptschalter (4) angeschlossen ist und auf die Warneinrichtung (11) geschlossen wird, wobei der weitere elektrische Kontakt (8) von dem Bimetallelement (5) gleichzeitig mit dem elektrischen Kontakt (7) des Bimetallelements aktiviert wird.
  2. Verriegelungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der elektrische Kontakt (7) des Bimetallelements (5) und der weitere elektrische Kontakt (8) von der normalerweise geöffneten Bauart sind.
EP90101353A 1989-01-30 1990-01-24 Türverriegelungsvorrichtung für eine Waschmaschine oder einen Wäschetrockner Expired - Lifetime EP0381022B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90101353T ATE83274T1 (de) 1989-01-30 1990-01-24 Tuerverriegelungsvorrichtung fuer eine waschmaschine oder einen waeschetrockner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8945706A IT1234684B (it) 1989-01-30 1989-01-30 Dispositivo di bloccaggio dello sportello per macchine lavabiancheria e/o asciugabiancheria
IT4570689 1989-01-30

Publications (2)

Publication Number Publication Date
EP0381022A1 EP0381022A1 (de) 1990-08-08
EP0381022B1 true EP0381022B1 (de) 1992-12-09

Family

ID=11257429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101353A Expired - Lifetime EP0381022B1 (de) 1989-01-30 1990-01-24 Türverriegelungsvorrichtung für eine Waschmaschine oder einen Wäschetrockner

Country Status (5)

Country Link
EP (1) EP0381022B1 (de)
AT (1) ATE83274T1 (de)
DE (1) DE69000537T2 (de)
ES (1) ES2036060T3 (de)
IT (1) IT1234684B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950000942B1 (ko) * 1991-10-21 1995-02-06 삼성전자 주식회사 삶는 세탁기의 덮개 잠금장치
IT1289378B1 (it) * 1996-05-22 1998-10-02 Electrolux Zanussi Elettrodome Lavabiancheria con bloccoporta istantaneo
US6036241A (en) * 1998-03-11 2000-03-14 Maytag Corporation Locking mechanism for an appliance door
KR101075223B1 (ko) * 2004-11-29 2011-10-19 삼성전자주식회사 드럼세탁기 및 그 제어방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003895A1 (de) * 1979-02-05 1980-08-14 Turnright Controls Steueranordnung fuer eine waschmaschine
IT8236051V0 (it) * 1982-10-04 1982-10-04 Texas Instruments Italia Spa Perfezionamento nei dispositivi di bloccaggio di sicurezza per sportelli di lavatrici e simili ad azionamento mediante bimetallo a riscaldamento voltmetrico

Also Published As

Publication number Publication date
EP0381022A1 (de) 1990-08-08
DE69000537T2 (de) 1993-04-15
IT8945706A0 (it) 1989-01-30
ES2036060T3 (es) 1993-05-01
DE69000537D1 (de) 1993-01-21
ATE83274T1 (de) 1992-12-15
IT1234684B (it) 1992-05-26

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