EP3444531A1 - Système d'ouverture de porte pour un appareil de cuisine - Google Patents

Système d'ouverture de porte pour un appareil de cuisine Download PDF

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Publication number
EP3444531A1
EP3444531A1 EP17186113.1A EP17186113A EP3444531A1 EP 3444531 A1 EP3444531 A1 EP 3444531A1 EP 17186113 A EP17186113 A EP 17186113A EP 3444531 A1 EP3444531 A1 EP 3444531A1
Authority
EP
European Patent Office
Prior art keywords
door
kitchen appliance
rotatable lever
operable
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.)
Withdrawn
Application number
EP17186113.1A
Other languages
German (de)
English (en)
Inventor
Klaus Wälzlein
Diego CREMON
Dmytro SOKOVETS
Sascha Ziegler
Trevor Specht
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP17186113.1A priority Critical patent/EP3444531A1/fr
Publication of EP3444531A1 publication Critical patent/EP3444531A1/fr
Withdrawn legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • A47L15/4259—Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0025—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/16—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C3/22—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled
    • E05C3/24—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled in the form of a bifurcated member

Definitions

  • the present invention relates to a kitchen appliance and in particular to a kitchen appliance having a door opening system.
  • a door opening system which is operable, either upon activation by a user or activated by a program control, to automatically open the door of the kitchen appliance.
  • microwave ovens can be equipped with door opening systems, which automatically open the oven door upon expiry of a preset operation duration.
  • dishwashers can be provided with door opening systems to open the dishwasher door at the end of a washing cycle so as to promote the venting of the tub in an effort to improve the drying process.
  • a cooker which comprises a door which is pivotable between a closed position and an open position, a latch which is operable to lock the door in the closed position, and an opening mechanism which is operable to move the door towards the open position.
  • the door is pivotable about a vertical axis that extends along one of the lateral edges of the door.
  • the door is biased by a spring towards the open position of the door, and a locking mechanism provides for locking the door in the closed position.
  • a motor driven opening mechanism is operable to unlock the door so that the door opens by the force of the spring.
  • a kitchen appliance comprising a door which is pivotable between a closed position and an open position, a latch which is operable to lock the door in the closed position, and an opening mechanism which is operable to move the door towards the open position
  • the above object is solved in that the door is pivotable about a horizontal axis that extends proximal a lower edge of the door, and the opening mechanism is operable to unlock the latch and to pivot the door beyond a dead center of the door.
  • the latch can comprises an engageable member that is attached to the door and a latching member which can be engaged with the engageable member.
  • the engageable member can be any member that allows engagement by the latching member, such as a hook and eye engagement, or a detent that engages a correspondingly shaped latching member.
  • the engageable member comprises a push rod operable to be engaged by the opening mechanism to push the door beyond its dead center.
  • the engageable member serves the double function of acting as part of the latch during closing the door, and to transfer the pushing force to the door during opening the door.
  • the opening mechanism comprises a rotatable lever having a first portion which forms the latching member and a second portion that is operable to apply a pushing force onto the push rod.
  • the first portion thus can have the shape of a hook which by rotation of the rotatable lever can be engaged with a respective portion of the engageable member, such as a rod that is provided which an eye into which the hook-shaped first portion of the rotatable lever can be inserted so as to provide for latching of the engageable member.
  • the engageable member With the engageable member being attached to the door, by such latching action the door can be locked in the closed position, and correspondingly can be unlocked by rotating the rotatable lever in the opposite direction.
  • the rotatable lever engages the engageable member with the second portion, so as to apply a pushing force onto the push rod, thus pushing the door open beyond its dead center, so that the door falls open by gravity.
  • the kitchen appliance further comprises a dead center spring acting on the rotatable lever so as to bias the latching member into engagement with the engageable member when the door is in the closed position, and to bias the second portion into engagement with the push rod when the rotatable lever has been rotated to unlock the latch.
  • the dead center spring thus provides for a dynamic closing force which tends to maintain the engagement of the latching member with the engageable member when the door is in the closed position, but which also assists the opening of the door by providing for a dynamic force that intensifies the engagement of the second portion of the rotatable lever with the push rod.
  • the kitchen appliance further comprises a cam for rotating the rotatable lever in the second direction.
  • the cam thus provides for rotation of the rotatable lever during an opening operation of the door so as to activate the push rod in order to pivot the door beyond its dead center
  • the rotation of the rotatable lever during a closing operation can be effected manually by a user closing the door, in which case the engageable member that is attached to the door engages the second portion of the rotatable lever.
  • the rotatable lever is rotated in the first direction, so as to provide for an engagement of the latch by which the door is locked in the closed position.
  • the rotatable lever and the cam are configured to allow free rotation of the rotatable lever once the rotatable lever has been rotated beyond it's the dead center of the spring. While for engaging and disengaging the latch and also for pivoting the door beyond its dead center the rotatable lever has to be rotated only for a certain angular range, the engagement between the cam and the rotatable lever can be restricted to such angular range.
  • the cam and the rotatable lever can be disengaged during movement of the rotatable lever in the opening direction already as soon as the dead center of the spring has been passed, so that the spring force can freely act onto the rotatable lever without interference of the cam.
  • the rotatable lever thus first is rotated by the action of the cam to unlock the latch and at the same time to compress the dead center spring, and then upon having passed the dead center, the cam and the rotatable lever disengage so that the spring load is released onto the push rod so as to nudge away the push rod and thus provide a thrust on the door, so that the door pivots beyond its dead center.
  • a cam that engages the rotatable lever only for a restricted angular range is of particular advantage when there is provided a motor for rotating the cam because in this manner during closing the door of the kitchen appliance, during which the rotatable lever is rotated in the reverse direction, the motor can be decoupled from the rotatable lever thus preserving the motor.
  • a motor can be used which is operable in only one direction which provides for a cost advantage versus having to provide for a reversible motor.
  • the kitchen appliance further comprises a motor for rotating the cam
  • a motor for rotating the cam preferably can be activated by control means of the kitchen appliance, so that the opening sequence can be initiated either by a user request, or automatically at the end of a pre-programmed operation cycle.
  • the kitchen appliance preferably comprises dampening means for dampening the opening movement of the door, so as to decelerate the movement of the door before it reaches a predetermined open position.
  • dampening means for dampening the opening movement of the door, so as to decelerate the movement of the door before it reaches a predetermined open position.
  • an oven such open position usually will be a substantially horizontal position of the door.
  • the open position either also may be also a substantially horizontal position, or can be an intermediate position in which the dishwasher door is opened for only a few centimeters, such as 5 to 20 cm, so as to allow venting of the dishwasher tub at the end of a washing cycle.
  • the kitchen appliance can comprise means for detecting the rotational position of the rotational switch and or means for detecting the rotational position of the cam.
  • the microwave function can be switched off for safety reasons as long as the door is not fully closed, which can be ascertained by such detection means.
  • the means for detecting the rotational position of the cam also can be used with advantage to switch on and off a motor for rotating the cam, so as to reliably uncouple and decouple the cam and the rotational switch.
  • the present invention can be employed in any kitchen appliance which allows installing the door to be pivotable about a horizontal axis.
  • the kitchen appliance particularly can be a cooking oven, such as a baking oven, a microwave oven, a steam oven, a combination oven, or a dishwasher.
  • the kitchen appliance is a cooking oven having an oven muffle 10 that is closed by a door 12 which is pivotable about a horizontal axis that extends along a lower edge of the door.
  • the pivotal movement of the door can be an exclusively rotational movement
  • the pivotal movement of the door also can comprise a combination of rotational and pivotal movement, such as in embodiments, in which the door is hinged to lateral lever elements, so that the horizontal pivot axis is not a fixed axis, but itself is shifted during an opening or closing movement of the door.
  • a handle 14 for manually pivoting the door which in the cooking oven described herein particularly applies to closing the door, whereas the opening of the door is effected automatically by means of an opening mechanism, designated generally with reference sign 16.
  • opening mechanism 16 comprises a rotatable lever 18 which is mounted on an axle 20, which in the embodiment shown in Figs. 1 and 2 is a stationary axle.
  • Rotatable lever 18 comprises a first portion 22 which forms a latching member and a second portion 24 that is operable to apply a pushing force onto a push rod 26 which is affixed to the door 12.
  • the push rod 26 projects through an aperture 28 in a border portion of the over muffle, and an eye 30 provided in the push rod 26 is engaged by the latching member which is formed by the first portion 22 of rotatable lever 18.
  • a spring 32 having two legs is hinged with a first leg 34 to a carrier 36 of the opening mechanism 16, so that the spring can pivot about the anchoring point of the first leg 34 at carrier 36.
  • a second leg 38 of spring 32 is pivotally connected to rotatable lever 18. In the closed position of the door 12, which is shown in Fig. 1 , the spring exerts a biasing force onto the rotatable lever 18 which tends to rotate the lever in the clockwise direction, thus providing a force that pulls push rod 26 inwardly to keep door 12 closed.
  • latching member 22 is disengaged from eye 30 thus unlocking the door 12.
  • second portion 24 of push rod 26 engages the free end of push rod 26 thus applying a pushing force to pivot the door 12 towards its open position.
  • rotatable lever 18 The rotation of rotatable lever 18 is effected by a cam 40 which is affixed to an output shaft 42 of a motor 44, that is attached to the rear side of carrier 36 (as seen in Figs. 1 and 2 ).
  • rotatable lever 18 and cam 40 are shaped so that for opening the door 12 starting from the situation shown in Fig. 1 the cam 40 is rotated in the clockwise direction, so as to rotate rotatable lever 18 in the counter-clockwise direction, until passing the dead center of spring 32, at which point the rotatable lever 18 and the cam 40 rotate out of engagement, and thus spring 32 can unload to thrust rotatable lever 18 further in the counter-clockwise direction, nudging away push rod 26.
  • door 12 is reliable pivoted beyond its dead center, which is reached at an opening angle of only a few degrees, so that the door 12 falls open by gravity.
  • a switch 46 detects the rotational position of output shaft 42, such as by providing a switching cam on output shaft 42 which engages a push-button of switch 46.
  • the rotational position of rotational switch 18 is detected by a switch 48. Based on the output of switch 48 which detects when the rotational switch 18 reaches the position shown in Fig. 2 and thus provides for an indication that the door is opened, the operation of further components of the kitchen appliances can be controlled, such as by deactivating a microwave functionality in an oven, or by turning on an illumination and/or a vent when the kitchen appliance is a dishwasher.
  • the opening mechanism suggested herein is designed as a retrofit unit for replacing a door latch, which only comprises a latching member and an engageable member attached to the door
  • the opening mechanism 16 further can be provided with circuitry 50, which in the simplest case can be a relay, to supplement the desired functionality for the control of the kitchen appliance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Electric Ovens (AREA)
EP17186113.1A 2017-08-14 2017-08-14 Système d'ouverture de porte pour un appareil de cuisine Withdrawn EP3444531A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17186113.1A EP3444531A1 (fr) 2017-08-14 2017-08-14 Système d'ouverture de porte pour un appareil de cuisine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17186113.1A EP3444531A1 (fr) 2017-08-14 2017-08-14 Système d'ouverture de porte pour un appareil de cuisine

Publications (1)

Publication Number Publication Date
EP3444531A1 true EP3444531A1 (fr) 2019-02-20

Family

ID=59655906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17186113.1A Withdrawn EP3444531A1 (fr) 2017-08-14 2017-08-14 Système d'ouverture de porte pour un appareil de cuisine

Country Status (1)

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EP (1) EP3444531A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023125966A1 (fr) * 2021-12-31 2023-07-06 广东美的厨房电器制造有限公司 Dispositif de verrouillage de porte et appareil de cuisson

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075309A2 (fr) * 1981-09-21 1983-03-30 Kabushiki Kaisha Toshiba Dispositif de verrouillage d'une porte de four de cuisson
EP0342307B1 (fr) 1988-05-20 1994-07-27 Kabushiki Kaisha Toshiba Appareil de cuisson
JP2005344980A (ja) * 2004-06-02 2005-12-15 Hitachi Home & Life Solutions Inc 高周波加熱装置
US20060033346A1 (en) * 2004-07-30 2006-02-16 Itw Industrial Components S.R.I Latch device for a door of an electric household appliance in particular a dishwashing machine
EP2193740A1 (fr) * 2008-11-19 2010-06-09 Miele & Cie. KG Machine à laver automatique
WO2012070023A1 (fr) * 2010-11-26 2012-05-31 Illinois Tool Works Inc. Dispositif de verrouillage de porte pour un appareil ménager électrique, en particulier un lave-vaisselle, et appareil ménager électrique en étant équipé
EP2574712A1 (fr) * 2011-09-27 2013-04-03 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager avec une cavité et une porte de fermeture de la cavité et procédé d'actionnement d'une porte d'un appareil ménager
WO2014056203A1 (fr) * 2012-10-12 2014-04-17 美的集团股份有限公司 Interrupteur de verrouillage de corps de porte et dispositif de cuisson à micro-ondes mettant en œuvre ledit interrupteur de verrouillage de corps de porte
DE102014202362A1 (de) * 2014-02-10 2015-08-13 Kendrion Kuhnke Automation Gmbh Motorisch angetriebene Verschlusseinrichtung, Heißgerät und Verfahren zum Betrieb einer motorischen Verschlusseinrichtung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075309A2 (fr) * 1981-09-21 1983-03-30 Kabushiki Kaisha Toshiba Dispositif de verrouillage d'une porte de four de cuisson
EP0342307B1 (fr) 1988-05-20 1994-07-27 Kabushiki Kaisha Toshiba Appareil de cuisson
JP2005344980A (ja) * 2004-06-02 2005-12-15 Hitachi Home & Life Solutions Inc 高周波加熱装置
US20060033346A1 (en) * 2004-07-30 2006-02-16 Itw Industrial Components S.R.I Latch device for a door of an electric household appliance in particular a dishwashing machine
EP2193740A1 (fr) * 2008-11-19 2010-06-09 Miele & Cie. KG Machine à laver automatique
WO2012070023A1 (fr) * 2010-11-26 2012-05-31 Illinois Tool Works Inc. Dispositif de verrouillage de porte pour un appareil ménager électrique, en particulier un lave-vaisselle, et appareil ménager électrique en étant équipé
EP2574712A1 (fr) * 2011-09-27 2013-04-03 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager avec une cavité et une porte de fermeture de la cavité et procédé d'actionnement d'une porte d'un appareil ménager
WO2014056203A1 (fr) * 2012-10-12 2014-04-17 美的集团股份有限公司 Interrupteur de verrouillage de corps de porte et dispositif de cuisson à micro-ondes mettant en œuvre ledit interrupteur de verrouillage de corps de porte
DE102014202362A1 (de) * 2014-02-10 2015-08-13 Kendrion Kuhnke Automation Gmbh Motorisch angetriebene Verschlusseinrichtung, Heißgerät und Verfahren zum Betrieb einer motorischen Verschlusseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023125966A1 (fr) * 2021-12-31 2023-07-06 广东美的厨房电器制造有限公司 Dispositif de verrouillage de porte et appareil de cuisson

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