EP0381022B1 - Dispositif de verrouillage de porte pour machine à laver ou à sécher le linge - Google Patents
Dispositif de verrouillage de porte pour machine à laver ou à sécher le linge Download PDFInfo
- 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
Links
- 238000005406 washing Methods 0.000 title claims abstract description 21
- 238000001035 drying Methods 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 3
- 230000004913 activation Effects 0.000 abstract description 2
- 230000011664 signaling Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
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)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Claims (2)
- Moyen de verrouillage de porte pour une machine à laver et/ou à sécher le linge, comprenant un programmateur-temporisateur (1) qui est alimenté par le courant électrique principal par l'intermédiaire d'au moins un contacteur général (4) et pour commander l'alimentation et la coupure des différents composants électriques de la machine, et comprenant également au moins un élément bimétallique (5) associé avec un PTC (dispositif à coefficient de température positif) classique et connecté au programmateur-temporisateur et qui est fermé et ouvert par l'intermédiaire d'un contact (6) du programmateur-temporisateur (1), l'élément bimétallique (5) étant pourvu d'au moins un contact électrique (7) qui est fermé pour mettre en circuit les composants électriques lorsque le PTC de l'élément bimétallique (5) est fermé, et qui est ouvert lorsque le PTC de l'élément bimétallique (5) est coupé, avec un temps de retard prédéterminé dû à l'inertie de l'élément bimétallique (5), l'élément bimétallique (5) étant en outre associé avec un ergot (12) en interaction avec le verrou (13) de la porte de manière à verrouiller et déverrouiller la porte lorsque le contact électrique (7) de l'élément bimétallique est, respectivement, fermé et ouvert, le moyen de verrouillage comprenant en outre au moins un moyen avertisseur (11) optique ou acoustique de type classique pour signaler l'état verrouillé ou déverrouillé de la porte, caractérisé en ce que l'élément bimétallique (5) est également associé avec au moins un contact électrique supplémentaire (8) connecté avant le contacteur général (4) et qui est fermé pour mettre en circuit le moyen avertisseur (11), le contact électrique supplémentaire (8) étant actionné par l'élément bimétallique (5) simultanément avec le contact électrique (7) de l'élément.
- Moyen de verrouillage selon la revendication 1, caractérisé en ce que le contact électrique (7) de l'élément bimétallique (5) et le contact électrique supplémentaire (8) sont du type normalement ouvert.
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 (fr) | 1990-08-08 |
EP0381022B1 true EP0381022B1 (fr) | 1992-12-09 |
Family
ID=11257429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90101353A Expired - Lifetime EP0381022B1 (fr) | 1989-01-30 | 1990-01-24 | Dispositif de verrouillage de porte pour machine à laver ou à sécher le linge |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0381022B1 (fr) |
AT (1) | ATE83274T1 (fr) |
DE (1) | DE69000537T2 (fr) |
ES (1) | ES2036060T3 (fr) |
IT (1) | IT1234684B (fr) |
Families Citing this family (4)
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)
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 |
-
1989
- 1989-01-30 IT IT8945706A patent/IT1234684B/it active
-
1990
- 1990-01-24 DE DE9090101353T patent/DE69000537T2/de not_active Expired - Fee Related
- 1990-01-24 AT AT90101353T patent/ATE83274T1/de not_active IP Right Cessation
- 1990-01-24 ES ES199090101353T patent/ES2036060T3/es not_active Expired - Lifetime
- 1990-01-24 EP EP90101353A patent/EP0381022B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0381022A1 (fr) | 1990-08-08 |
IT8945706A0 (it) | 1989-01-30 |
ATE83274T1 (de) | 1992-12-15 |
DE69000537D1 (de) | 1993-01-21 |
ES2036060T3 (es) | 1993-05-01 |
DE69000537T2 (de) | 1993-04-15 |
IT1234684B (it) | 1992-05-26 |
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