EP0617235B1 - Locking device for door of a cooker - Google Patents

Locking device for door of a cooker Download PDF

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Publication number
EP0617235B1
EP0617235B1 EP94400613A EP94400613A EP0617235B1 EP 0617235 B1 EP0617235 B1 EP 0617235B1 EP 94400613 A EP94400613 A EP 94400613A EP 94400613 A EP94400613 A EP 94400613A EP 0617235 B1 EP0617235 B1 EP 0617235B1
Authority
EP
European Patent Office
Prior art keywords
door
oven
hook
locking
slider
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
EP94400613A
Other languages
German (de)
French (fr)
Other versions
EP0617235A3 (en
EP0617235A2 (en
Inventor
Michel Montassier
Georges Bourgeois
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.)
Brandt Industries SAS
Original Assignee
Brandt Cooking SAC
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Filing date
Publication date
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Application filed by Brandt Cooking SAC filed Critical Brandt Cooking SAC
Publication of EP0617235A2 publication Critical patent/EP0617235A2/en
Publication of EP0617235A3 publication Critical patent/EP0617235A3/en
Application granted granted Critical
Publication of EP0617235B1 publication Critical patent/EP0617235B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/022—Latches

Definitions

  • a device a for locking the door of an oven in particular for a self-cleaning oven. he relates to a lock mounted on the oven frame, the lock being moved linearly under the control of an actuator and comprising a part in wedge shape. During locking, this part cooperates with a device mounted on the door, this device comprising a wheel which rolls over the part wedge-shaped and drives the entire device in translation for the locking or unlocking the door.
  • the wheel and its support always protrude from the door, presenting the disadvantages mentioned above.
  • the actuator can be constituted by a thermosensitive cylinder used in place of an engine with a cam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Vending Machines For Individual Products (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The present invention relates to a device for locking the door of a cooker. This device comprises, mounted on the chassis, a hooking device comprising a pivoting hook (7) actuated by the displacement of a slide (9) controlled by an actuator (14) which is brought into play at the time of locking and unlocking, the hook coming at the time of locking to engage a catch (4) mounted on the door. Application, in particular, to cookers with cleaning by pyrolysis. <IMAGE>

Description

La présente invention concerne un dispositif de verrouillage de la porte d'un four, plus particulièrement d'un four autonettoyant tel que les fours utilisant un nettoyage par pyrolyse.The present invention relates to a device for locking the door of an oven, more particularly of a self-cleaning oven such as ovens using pyrolysis cleaning.

La pyrolyse est une opération connue de nettoyage des fours de cuisson qui consiste à détruire par la chaleur les dépôts gras ou les salissures qui apparaissent sur les parois du four lors de la cuisson ou du réchauffage des aliments. Le nettoyage des fours par pyrolyse nécessite une montée en température de l'enceinte du four jusqu'à environ 500°C.Pyrolysis is a known operation for cleaning kilns cooking, which consists of destroying fatty deposits or dirt that appears on the oven walls during cooking or reheating food. Cleaning ovens by pyrolysis requires a temperature rise of the oven enclosure to around 500 ° C.

Dans ce cas, si l'on ouvre la porte du four, on met en contact l'air ambiant avec l'intérieur du four qui se trouve être à une température d'environ 500°C. L'air frais admis lors de l'ouverture et emprisonné dans l'enceinte close à une telle température se dilate. Il y a donc risque d'explosion du four. Pour éviter ce risque, la norme actuellement en vigueur impose qu'à partir d'une température donnée, de l'ordre de 350°C, la porte du four soit verrouillée. Ce verrouillage doit être maintenu pendant toute la période où la température à l'intérieur de l'enceinte se trouve être entre 350°C et environ 500°C.In this case, if you open the oven door, you put the air in contact ambient with the interior of the oven which happens to be at a temperature about 500 ° C. Fresh air admitted at the opening and trapped in the enclosure closed at such a temperature expands. There is therefore a risk explosion. To avoid this risk, the standard currently in force requires that from a given temperature, of the order of 350 ° C, the door oven is locked. This lock must be maintained throughout period when the temperature inside the enclosure happens to be between 350 ° C and around 500 ° C.

Il existe actuellement sur le marché, différents types de dispositifs de verrouillage de la porte d'un four autonettoyant, plus particulièrement d'un four à nettoyage par pyrolyse. Ces dispositifs sont en général des dispositifs électromécaniques comportant un nombre de pièces en mouvement relativement élevé. D'autre part, ils présentent le plus souvent des crochets fixes ou mobiles en saillie par rapport à la porte ou au châssis du four, ce qui entraíne des inconvénients, notamment au niveau des facilités de nettoyage et de l'esthétique du four.There are currently different types of devices on the market for locking the door of a self-cleaning oven, more particularly of a pyrolysis cleaning oven. These devices are generally devices electromechanical with a number of moving parts relatively high. On the other hand, they most often have hooks fixed or movable projecting from the door or the frame of the oven, which has disadvantages, especially in terms of cleaning facilities and the aesthetics of the oven.

Ainsi, dans le document US-A-4230350 est décrit un dispositif un de verrouillage de la porte d'un four, notamment pour four autonettoyant. Il concerne un verrou monté sur le châssis du four, le verrou étant déplacé linéairement sous la commande d'un actionneur et comportant une partie en forme de coin. Lors du verrouillage, cette partie coopère avec un dispositif monté sur la porte, ce dispositif comportant une roue qui roule sur la partie en forme de coin et entraíne l'ensemble du dispositif en translation pour le verrouillage ou le déverrouillage de la porte. Cependant, la roue et son support restent toujours en saillie par rapport à la porte, présentant les inconvénients cités ci-dessus.Thus, in document US-A-4230350 is described a device a for locking the door of an oven, in particular for a self-cleaning oven. he relates to a lock mounted on the oven frame, the lock being moved linearly under the control of an actuator and comprising a part in wedge shape. During locking, this part cooperates with a device mounted on the door, this device comprising a wheel which rolls over the part wedge-shaped and drives the entire device in translation for the locking or unlocking the door. However, the wheel and its support always protrude from the door, presenting the disadvantages mentioned above.

La présente invention a donc pour but de remédier notamment à ces inconvénients, en proposant un nouveau dispositif de verrouillage de la porte d'un four, plus particulièrement mais non exclusivement d'un four autonettoyant qui soit de structure simple et permet de plus un nettoyage aisé de toutes les parties du four.The present invention therefore aims to remedy in particular to these disadvantages, by proposing a new device for locking the door of an oven, more particularly but not exclusively of an oven self-cleaning that is simple in structure and also allows cleaning easy from all parts of the oven.

En conséquence, la présente invention a pour objet un dispositif de verrouillage de la porte d'un four tel que défini dans les revendications 1 à 9. Consequently, the subject of the present invention is a device for locking the door of an oven as defined in claims 1 to 9.

Les caractéristiques et avantages de la présente invention apparaítront à la lecture de la description d'un mode de réalisation préférentiel, cette description étant faite ci-après avec référence au dessin ci-annexé dans lequel :

  • la figure 1 est une vue en élévation latérale d'un dispositif de verrouillage conforme à la présente invention monté dans la partie supérieure d'un four autonettoyant, et
  • la figure 2 est une vue de dessus du dispositif de verrouillage de la figure 1.
The characteristics and advantages of the present invention will appear on reading the description of a preferred embodiment, this description being made below with reference to the attached drawing in which:
  • FIG. 1 is a side elevation view of a locking device according to the present invention mounted in the upper part of a self-cleaning oven, and
  • FIG. 2 is a top view of the locking device in FIG. 1.

Comme représenté sur les figures 1 et 2, un dispositif de verrouillage conforme à la présente invention est positionné dans la partie supérieure d'un four autonettoyant, plus particulièrement d'un four à nettoyage par pyrolyse. Sur la figure 1, la référence 1 désigne l'enceinte de cuisson ou moufle du four. Cette enceinte de cuisson ou moufle est entourée par un châssis métallique 2 dans la partie supérieure duquel est monté, conformément au mode de réalisation représenté, un dispositif de crochetage conforme à la présente invention. Plus précisément, le dispositif de crochetage est prévu sous le panneau de commande du four. De manière connue, le moufle du four est fermé par une porte référencée 3. Conformément à la présente invention, sur la partie supérieure de la porte 3 est prévue une gâche 4 formant une cavité pour recevoir, en position verrouillée, le dispositif de crochetage.As shown in FIGS. 1 and 2, a device for locking according to the present invention is positioned in the part upper of a self-cleaning oven, more particularly of a cleaning by pyrolysis. In FIG. 1, the reference 1 designates the enclosure of baking or oven muffle. This cooking chamber or muffle is surrounded by a metal frame 2 in the upper part of which is mounted, in accordance with the embodiment shown, a device for hooking according to the present invention. More specifically, the device is provided under the oven control panel. So known, the oven muffle is closed by a door referenced 3. According to the present invention, on the upper part of the door 3 a keeper 4 is provided forming a cavity to receive, in position locked, the hooking device.

Comme représenté sur les figures 1 et 2, le dispositif de crochetage est constitué essentiellement d'un support 5 qui peut être réalisé, par exemple en matière plastique de manière à limiter son poids ou en tout autre matériau connu. Sur ce support 5 est monté de manière à pouvoir pivoter autour d'un axe 6, un crochet 7 destiné à venir dans la gâche. Le crochet se prolonge sur sa partie opposée par un doigt de verrouillage 8 dont le rôle sera expliqué ci-après. De plus, sur le support est montée une glissière 9 susceptible de se déplacer linéairement de manière à venir en butée contre le doigt 8 lorsque le verrouillage est déclenché pour faire basculer le crochet 7 autour de l'axe 6 et l'amener en position dans la gâche 4. Pour ce faire, la glissière présente à son extrémité côté doigt de verrouillage 8, une partie en saillie 10. D'autre part, la glissière présente, dans sa partie arrière, une fenêtre 11 entourée par des parties en saillie 12 dans laquelle vient se positionner la came 13 d'un moteur 14 jouant le rôle d'actionneur. Le moteur 14 qui peut être du type de ceux utilisés pour les tournebroches est mis en oeuvre par une impulsion provenant par exemple d'un microprocesseur et déclenché lorsque la température à l'intérieur du four atteint une température de consigne, à savoir actuellement une température de l'ordre de 350°C. Lorsque le moteur commence à tourner, la came déplace linéairement la glissière de manière à amener le crochet dans la gâche 4 comme décrit ci-dessus. Comme représenté clairement sur la figure 1, le dispositif de crochetage est placé dans la partie supérieure du châssis 2 du four de telle sorte que le crochet soit invisible de l'extérieur, ce qui améliore l'esthétique générale du four.As shown in Figures 1 and 2, the hooking consists essentially of a support 5 which can be made, for example of plastic material so as to limit its weight or any other known material. On this support 5 is mounted so as to be able to pivot around an axis 6, a hook 7 intended to come into the spoils. The hook is extended on its opposite part by a finger lock 8, the role of which will be explained below. In addition, on the support is mounted a slide 9 capable of moving linearly so to come into abutment against finger 8 when the locking is released for tilt the hook 7 around the axis 6 and bring it into position in the keeper 4. To do this, the slide has at its end finger side of locking 8, a projecting part 10. On the other hand, the slide has, in its rear part, a window 11 surrounded by projecting parts 12 in which is positioned the cam 13 of a motor 14 playing the role actuator. The motor 14 which can be of the type of those used for the rotisserie is implemented by an impulse for example of a microprocessor and triggered when the temperature inside the oven reaches a set temperature, currently a temperature of the order of 350 ° C. When the engine starts to run, the cam linearly moves the slide so as to bring the hook in keeper 4 as described above. As shown clearly on the Figure 1, the hooking device is placed in the upper part of the frame 2 of the oven so that the hook is invisible from the outside, this which improves the overall appearance of the oven.

D'autre part, lorsque la température à l'intérieur du four est redescendue autour d'une température de consigne qui actuellement est de l'ordre de 350°C, le moteur est entraíné en rotation et la came ramène la glissière vers l'arrière, réalisant ainsi un déverrouillage, permettant, une fois le nettoyage terminé, d'ouvrir le four. Un microrupteur 16 contrôle l'arrêt du moteur en position verrouillée.On the other hand, when the temperature inside the oven is back down around a set temperature which is currently around 350 ° C, the motor is rotated and the cam brings the backward slide, thus unlocking, allowing, once cleaning finished, open the oven. A microswitch 16 controls the stopping of the motor in locked position.

D'autre part, un ressort de rappel 15 est prévu entre la glissière 9, à savoir plus particulièrement un élément en saillie 9' de la glissière et le moteur 14, de manière à escamoter le crochet en réalisant un rattrapage de jeux.On the other hand, a return spring 15 is provided between the slide 9, namely more particularly a projecting element 9 'of the slide and the motor 14, so as to retract the hook by making up for games.

De manière connue, un dispositif de détection de fermeture de porte est associé au dispositif de verrouillage. De ce fait, le dispositif de verrouillage ne fonctionne que lorsque la porte est en position fermée.In known manner, a device for detecting the closure of door is associated with the locking device. As a result, the locking only works when the door is in the closed position.

Le dispositif décrit ci-dessus présente de nombreux avantages. Il est d'une constitution relativement simple et comporte peu de pièces mécaniques en action les unes par rapport aux autres. D'autre part, la position du dispositif de crochetage et de la gâche sont telles qu'elles facilitent le nettoyage du four et améliorent son esthétique, car elles sont invisibles à l'oeil.The device described above has many advantages. he is relatively simple in constitution and has few parts mechanical in action with respect to each other. On the other hand, the position of the hooking device and the keeper are such that they facilitate cleaning of the oven and improve its aesthetics, because they are invisible to the eye.

Il est évident pour l'homme de l'art que l'exemple de réalisation décrit ci-dessus a été donné à titre d'exemple et n'est nullement limitatif. Notamment l'actionneur peut être constitué par un vérin thermosensible utilisé à la place d'un moteur muni d'une came. It is obvious to those skilled in the art that the exemplary embodiment described above has been given by way of example and is in no way limiting. In particular the actuator can be constituted by a thermosensitive cylinder used in place of an engine with a cam.

D'autre part, par four dans la présente invention, on entend aussi les cuisinières, les gazinières, les fours industriels et tous les fours nécessitant un verrouillage de la porte à partir d'une certaine température.On the other hand, by oven in the present invention is also meant stoves, gas stoves, industrial ovens and all ovens requiring a door lock from a certain temperature.

Enfin, le dispositif selon l'invention peut également équiper un four dont la porte est à ouverture latérale.Finally, the device according to the invention can also equip a oven with door opening sideways.

Claims (9)

  1. Device for locking the door (3) of an oven, of the type including a hooking device comprising a hook (7) pivoting about a spindle (6) under the action of the movement of a control element (9) mounted on the chassis of the oven and driven by an actuator (14) set into operation upon the locking and the unlocking of the door, the said control element being a slider shifted linearly, during the locking, the device being characterised in that the hooking device is mounted on the chassis of the oven, in that the said hook comes to interact, during the locking, with a piece (4) of the door, in that the said piece (4) is a striker plate forming a cavity for receiving the said hook, in that the said slider is shifted in such a way as to come into abutment against a spigot (8) extending the hook with respect to the spindle, and in that, in unlocked position, the hook (7) and the piece (4) constitute elements which do not project with respect to the chassis and to the door of the oven respectively.
  2. Device according to Claim 1, characterised in that the actuator consists of a motor (14) equipped with a cam (13) the movement of which drives the movement of the slider.
  3. Device according to Claim 2, characterised in that the motor is caused to start when the temperature within the oven is higher than a set-point temperature.
  4. Device according to either of Claims 2 and 3, characterised in that the starting of the motor is carried out by a pulse originating from a microprocessor.
  5. Device according to Claim 1, characterised in that the actuator consists of a heat-sensitive jack.
  6. Device according to any one of Claims 1 to 5, characterised in that the striker plate (4) is mounted on the upper part of the door (3).
  7. Device according to any one of Claims 1 to 6, characterised in that it further includes a return spring (15) mounted between the slider (9) and the actuator (14) for bringing the hook into retracted position.
  8. Device according to any one of Claims 1 to 7, characterised in that the unlocking is monitored by a microswitch (16).
  9. Device according to any one of Claims 1 to 8, characterised in that it is associated with a door-closed detection device.
EP94400613A 1993-03-23 1994-03-22 Locking device for door of a cooker Expired - Lifetime EP0617235B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9303309 1993-03-23
FR9303309A FR2703137B1 (en) 1993-03-23 1993-03-23 Locking device for an oven door.

Publications (3)

Publication Number Publication Date
EP0617235A2 EP0617235A2 (en) 1994-09-28
EP0617235A3 EP0617235A3 (en) 1999-03-31
EP0617235B1 true EP0617235B1 (en) 2002-01-30

Family

ID=9445240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400613A Expired - Lifetime EP0617235B1 (en) 1993-03-23 1994-03-22 Locking device for door of a cooker

Country Status (5)

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EP (1) EP0617235B1 (en)
AT (1) ATE212705T1 (en)
DE (1) DE69429738T2 (en)
ES (1) ES2169064T3 (en)
FR (1) FR2703137B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004016113D1 (en) * 2004-02-16 2008-10-09 Lg Electronics Inc Opening and closing system for an oven door
DE102006024899B3 (en) * 2006-05-24 2007-10-31 Miele & Cie. Kg Door locking mechanism for household appliance, e.g. microwave oven, includes electric drive moving locking section between locked and unlocked positions
DE102006042177A1 (en) * 2006-09-08 2008-03-27 BSH Bosch und Siemens Hausgeräte GmbH oven

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416515A (en) * 1965-10-22 1968-12-17 Essex Wire Corp Door latching actuator assembly
US3462584A (en) * 1967-08-09 1969-08-19 Kelvinator Inc Range oven door latching device
DE2618784A1 (en) * 1976-04-29 1977-11-17 Licentia Gmbh Self-cleaning oven door locking device - has two switches in series, the second of which closes after first when predetermined temp. is reached
US4230350A (en) * 1979-04-05 1980-10-28 Magic Chef, Inc. Oven door latch
JPS57155038A (en) * 1981-03-20 1982-09-25 Matsushita Electric Ind Co Ltd Cooking heater
AU541443B2 (en) * 1982-07-16 1985-01-10 Tokyo Shibaura Denki Kabushiki Kaisha Lock
AU596039B2 (en) * 1988-05-20 1990-04-12 Kabushiki Kaisha Toshiba Cooker
US4927996A (en) * 1988-05-23 1990-05-22 Robertshaw Controls Company Cooking apparatus, door latching construction therefor and methods of making the same

Also Published As

Publication number Publication date
DE69429738D1 (en) 2002-03-14
EP0617235A3 (en) 1999-03-31
ATE212705T1 (en) 2002-02-15
FR2703137A1 (en) 1994-09-30
DE69429738T2 (en) 2002-10-17
FR2703137B1 (en) 1995-04-28
ES2169064T3 (en) 2002-07-01
EP0617235A2 (en) 1994-09-28

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