EP3841268B1 - Household appliance with a door opening mechanism - Google Patents

Household appliance with a door opening mechanism Download PDF

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Publication number
EP3841268B1
EP3841268B1 EP19765819.8A EP19765819A EP3841268B1 EP 3841268 B1 EP3841268 B1 EP 3841268B1 EP 19765819 A EP19765819 A EP 19765819A EP 3841268 B1 EP3841268 B1 EP 3841268B1
Authority
EP
European Patent Office
Prior art keywords
door
household appliance
cam
lock
closing
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.)
Active
Application number
EP19765819.8A
Other languages
German (de)
French (fr)
Other versions
EP3841268A1 (en
Inventor
Blazej Pyzik
Tomasz PACHCINSKI
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.)
Amica SA
Original Assignee
Amica SA
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 Amica SA filed Critical Amica SA
Publication of EP3841268A1 publication Critical patent/EP3841268A1/en
Application granted granted Critical
Publication of EP3841268B1 publication Critical patent/EP3841268B1/en
Active legal-status Critical Current
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
    • 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
    • E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/02—Automatic catches, i.e. released by pull or pressure on the wing
    • E05C19/026—Automatic catches, i.e. released by pull or pressure on the wing with a keeper caught between two pivoting bolts
    • 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
    • E05B2047/0048—Circuits, feeding, monitoring
    • E05B2047/0067—Monitoring
    • E05B2047/0069—Monitoring bolt position

Definitions

  • the present invention concerns a household appliance with a door opening mechanism.
  • the door opening mechanism allows for an automatic opening of the door of a household appliance, in particular, of an oven, released for example with a button on a control panel or a sensor located on the surface of the handle or connected to the handle.
  • Known door locks that enable keeping the door in a closed position and preventing the door from being opened by the user.
  • a European patent no. EP2479364 describes a solution, in which the door is locked by cooperation of the locking ledge located on the appliance door with a lock located in the body of the appliance.
  • the lock is equipped with a profile hook, whose rotation is controlled by the slider on a spring.
  • the door is locked by blocking the movement of the slider by an electromechanism with a moving catch.
  • Document DE 10 2011 011662 A1 discloses a lock for a dishwasher door comprising a lock for installation in the body of the dishwasher and a connecting unit mounted on the door of the dishwasher. It is also possible to install a lock on the dishwasher door and the connecting unit in the dishwasher body.
  • the lock comprises a pair of locking arms located in a housing and connected by a pressing spring, each arm mounted on a separate pivot axis. The free ends of the closing arms protrude from the housing and may deviate from the normal position held by the pressing spring against the spring return force.
  • the connecting unit comprises a closing throat, into which the free ends of the closing arms enter, when closing the dishwasher door.
  • the dishwasher door can be automatically opened by an opening unit comprising a screw mechanism driven by a motor which brings the free ends of the closing arms closer together and extends their ends from the recesses in the end zone of the closing throat.
  • the dishwasher door can also be automatically opened by a bolt on the actuator, which pushes the door out of the closed position.
  • the purpose of the invention is to develop household appliance with a door opening mechanism, the door of which can be opened automatically while keeping the possibility to open them manually.
  • a houshold appliance with a door opening mechanism consisting of a body closed by a door, including a lock mounted in the body of the household appliance, profile element located on the door of the household appliance and, located between the body and the door element exerting permanent force on a closed door in the direction of opening, characterised in that the lock consists of a rigid base, positioning other components, a pair of closing arms mounted on one axis built in the base, and intersecting with each other in the mounting location, that in the front part, between the pivot axis and the appliance door, have hook-shaped ends forming a clamp, and two helical pressing springs, whose ends are mounted respectively to the rear part of the closing arm and the adjacent to the arm side wall of the base.
  • Hook-shaped ends of the front part of the closing arms are located at the pin attached to the upper door rail of the appliance, which is a profile element of the appliance door opening mechanism.
  • the hook-shaped ends of the closing arms catch the pin, press the door to the gasket of the body of the appliance, and retain the door in a closed position.
  • a cam mounted on an driving shaft which causes the cam to rotate.
  • the closing arms are temporarily opened and the pin is released.
  • the lock further comprises a cam position sensor which allows the drive to be switched on and off once the cam has reached the correct angular position. The door opens following rotation of the cam to the position of maximum opening of the clamps of the closing arms and the pin release.
  • the pin has a shape of a deltoid with rounded vertices.
  • the long sides of the pin are directed towards the body of the household appliance.
  • the smaller lead angle during door closing allows to reduce the force required to close it, while larger lead angle when opening the door makes the force pressing the door to the housing gasket ensures the closure, and at the same time requires the use of sufficient force to open the door of the machine. This reduces the risk of accidental, uncontrolled door opening.
  • the advantage of the household appliance with a door opening mechanism according to the invention is a simple design consisting of few elements, which translates into relatively low cost of its production.
  • the lock allows both automatic door opening and manual opening at any time of the household appliance operation.
  • the mechanism has a neat appearance and can be easily adapted to different types of the household appliance front.
  • fig. 1 shows the lock in the closed position in a perspective view
  • fig. 2 shows the lock in a closed position in a view from the top
  • fig. 3 shows cross-section A:A of the lock shown in fig. 2
  • fig. 4 shows the lock in side view
  • fig. 5 shows cross-section B:B shown in fig. 4 of the lock in the closed position
  • fig. 6 shows cross-section B:B shown in fig. 4 of the lock in the open position
  • fig. 7 shows a perspective view of the Household appliance with a door opening mechanism and the location of the lock clamps
  • fig. 8 shows detail A shown in figure 7
  • fig. 9 shows the household appliance door from the appliance body side
  • fig. 10 is a schematic drawing of the pin with clenched clamps on it, from the top.
  • the household appliance with a door opening mechanism comprise the lock 13 mounted in the front panel of the body 12 of the household appliance, in such a way that its closing arms 2 are located at the height of the pin 8 located in the strip 9 of the door 11 household appliance. Closing arms 2 cooperate with the pin 8 during of opening and closing the door 11.
  • the lock 13 comprises a rigid base 1 in the form of a bearing plate, positioning other components of the lock 13.
  • the base has the pivotally mounted pair of closing arms 2, mounted on a common axis 3.
  • One of the closing arms 2 is "S"-shaped and the other one is shaped as an inverted “S”, and are mounted one on top of the other on the same axis 3 built in the base 1, intersecting each other in the place of mounting, in the middle of their length.
  • Arms 2 have vertical ends 2c of the rear parts of the arms 2b, and the free parts of the front section 2a of the closing arms 2 extending below the base of the lock 1 are the hook-shaped ends forming clamps cooperating with the pin 8 located on the door 11.
  • Lock 13 has two helical pressing springs 4, the ends of which are mounted respectively to the vertical ends 2c of the rear part 2b of the closing arms 2 and adjacent to the arms 2 side walls 1a of the base 1, on which they are based, while being mounted on a tongue located on this side wall 1a.
  • These springs 4 press against the ends 2c of the rear parts 2b of the closing arms 2 and cause clenching of the front parts 2a of the closing arms 2. Opening the arms 2 may occur as a result of rotation of the cam 5 mounted on the drive shaft 6.
  • Profile element is a pin 8 which is an integral element in the strip of the door 9.
  • the pin 8 has a shape of a deltoid with rounded vertices, and its long sides 8a are directed towards the body 12 of the appliance.
  • Closing arms 2 cooperate with the pin 8, whose shape is chosen so that at the moment of closing the door 11 the force required to close them is reduced, and exert a force pressing the door 11 to the gasket.
  • a threshold force is required, and the door 11 can be opened only after this force is exceeded.
  • the cam 5 is rotated by the drive 6 by an angle of 180°, thereby causing a temporary opening of the closing arms 2, thereby allowing automatic opening of the door, on which in the closed position a constant force is exerted in the direction of opening.
  • this element are hinges 10 mounted on the door 11 between the door 11 and the body 12 to allow movement of the door 11.
  • the lock is equipped with a cam position sensor 7, which enables and disables the drive 6 when the cam 5 has reached the correct angular position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Washing And Drying Of Tableware (AREA)

Description

  • The present invention concerns a household appliance with a door opening mechanism. The door opening mechanism allows for an automatic opening of the door of a household appliance, in particular, of an oven, released for example with a button on a control panel or a sensor located on the surface of the handle or connected to the handle.
  • Known are door locks that enable keeping the door in a closed position and preventing the door from being opened by the user. For example, a European patent no. EP2479364 describes a solution, in which the door is locked by cooperation of the locking ledge located on the appliance door with a lock located in the body of the appliance. The lock is equipped with a profile hook, whose rotation is controlled by the slider on a spring. The door is locked by blocking the movement of the slider by an electromechanism with a moving catch.
  • Document DE 10 2011 011662 A1 discloses a lock for a dishwasher door comprising a lock for installation in the body of the dishwasher and a connecting unit mounted on the door of the dishwasher. It is also possible to install a lock on the dishwasher door and the connecting unit in the dishwasher body. The lock comprises a pair of locking arms located in a housing and connected by a pressing spring, each arm mounted on a separate pivot axis. The free ends of the closing arms protrude from the housing and may deviate from the normal position held by the pressing spring against the spring return force. The connecting unit comprises a closing throat, into which the free ends of the closing arms enter, when closing the dishwasher door. In the closing throat there are surfaces for deflecting the closing arms, wherein the first biasing surfaces move towards each other causing the closing arms to approach each other. In the end zone of the closing throat there are recesses for receiving the free ends of the closing arms. When closing the dishwasher, the ends of the free ends of the closing arms are positioned in the recesses under the action of the return force of the pressing spring. The dishwasher door can be automatically opened by an opening unit comprising a screw mechanism driven by a motor which brings the free ends of the closing arms closer together and extends their ends from the recesses in the end zone of the closing throat. The dishwasher door can also be automatically opened by a bolt on the actuator, which pushes the door out of the closed position.
  • In the solution EP2479364B1 , the door is released for opening by the user, however, automatic door opening is impossible. This solution is mainly used in washing machines. The lock in solution PL216474 B1 in versions enabling automatic opening of the door consists of a number of components and has a complicated design.
  • The purpose of the invention is to develop household appliance with a door opening mechanism, the door of which can be opened automatically while keeping the possibility to open them manually.
  • Accordingly, there is provided a houshold appliance with a door opening mechanism, consisting of a body closed by a door, including a lock mounted in the body of the household appliance, profile element located on the door of the household appliance and, located between the body and the door element exerting permanent force on a closed door in the direction of opening, characterised in that the lock consists of a rigid base, positioning other components, a pair of closing arms mounted on one axis built in the base, and intersecting with each other in the mounting location, that in the front part, between the pivot axis and the appliance door, have hook-shaped ends forming a clamp, and two helical pressing springs, whose ends are mounted respectively to the rear part of the closing arm and the adjacent to the arm side wall of the base. Hook-shaped ends of the front part of the closing arms are located at the pin attached to the upper door rail of the appliance, which is a profile element of the appliance door opening mechanism. When the appliance door is closed, the hook-shaped ends of the closing arms catch the pin, press the door to the gasket of the body of the appliance, and retain the door in a closed position. Between the ends of the rear parts of the closing arms, there is a cam mounted on an driving shaft, which causes the cam to rotate. During a 180° rotation of the cam, the closing arms are temporarily opened and the pin is released. The lock further comprises a cam position sensor which allows the drive to be switched on and off once the cam has reached the correct angular position. The door opens following rotation of the cam to the position of maximum opening of the clamps of the closing arms and the pin release.
  • It is advantageous if the pin has a shape of a deltoid with rounded vertices.
  • It is also advantageous if the long sides of the pin are directed towards the body of the household appliance. In this way, the smaller lead angle during door closing allows to reduce the force required to close it, while larger lead angle when opening the door makes the force pressing the door to the housing gasket ensures the closure, and at the same time requires the use of sufficient force to open the door of the machine. This reduces the risk of accidental, uncontrolled door opening.
  • The advantage of the household appliance with a door opening mechanism according to the invention is a simple design consisting of few elements, which translates into relatively low cost of its production. The lock allows both automatic door opening and manual opening at any time of the household appliance operation. Furthermore, the mechanism has a neat appearance and can be easily adapted to different types of the household appliance front.
  • The subject matter of the invention in an example embodiment is shown in the figure, where fig. 1 shows the lock in the closed position in a perspective view, fig. 2 shows the lock in a closed position in a view from the top, fig. 3 shows cross-section A:A of the lock shown in fig. 2, fig. 4 shows the lock in side view, fig. 5 shows cross-section B:B shown in fig. 4 of the lock in the closed position, fig. 6 shows cross-section B:B shown in fig. 4 of the lock in the open position, fig. 7 shows a perspective view of the Household appliance with a door opening mechanism and the location of the lock clamps, fig. 8 shows detail A shown in figure 7, fig. 9 shows the household appliance door from the appliance body side, fig. 10 is a schematic drawing of the pin with clenched clamps on it, from the top.
  • The household appliance with a door opening mechanism, according to the present invention comprise the lock 13 mounted in the front panel of the body 12 of the household appliance, in such a way that its closing arms 2 are located at the height of the pin 8 located in the strip 9 of the door 11 household appliance. Closing arms 2 cooperate with the pin 8 during of opening and closing the door 11. In the embodiment, the lock 13 comprises a rigid base 1 in the form of a bearing plate, positioning other components of the lock 13. The base has the pivotally mounted pair of closing arms 2, mounted on a common axis 3. One of the closing arms 2 is "S"-shaped and the other one is shaped as an inverted "S", and are mounted one on top of the other on the same axis 3 built in the base 1, intersecting each other in the place of mounting, in the middle of their length. Arms 2 have vertical ends 2c of the rear parts of the arms 2b, and the free parts of the front section 2a of the closing arms 2 extending below the base of the lock 1 are the hook-shaped ends forming clamps cooperating with the pin 8 located on the door 11. Lock 13 has two helical pressing springs 4, the ends of which are mounted respectively to the vertical ends 2c of the rear part 2b of the closing arms 2 and adjacent to the arms 2 side walls 1a of the base 1, on which they are based, while being mounted on a tongue located on this side wall 1a. These springs 4 press against the ends 2c of the rear parts 2b of the closing arms 2 and cause clenching of the front parts 2a of the closing arms 2. Opening the arms 2 may occur as a result of rotation of the cam 5 mounted on the drive shaft 6. Profile element is a pin 8 which is an integral element in the strip of the door 9. The pin 8 has a shape of a deltoid with rounded vertices, and its long sides 8a are directed towards the body 12 of the appliance. Closing arms 2 cooperate with the pin 8, whose shape is chosen so that at the moment of closing the door 11 the force required to close them is reduced, and exert a force pressing the door 11 to the gasket. To open the door 11, a threshold force is required, and the door 11 can be opened only after this force is exceeded. Upon the command from the control system, the cam 5 is rotated by the drive 6 by an angle of 180°, thereby causing a temporary opening of the closing arms 2, thereby allowing automatic opening of the door, on which in the closed position a constant force is exerted in the direction of opening. In the embodiment, this element are hinges 10 mounted on the door 11 between the door 11 and the body 12 to allow movement of the door 11.
  • Furthermore, the lock is equipped with a cam position sensor 7, which enables and disables the drive 6 when the cam 5 has reached the correct angular position.

Claims (3)

  1. Household appliance with a door opening mechanism, consisting of a body (12) closed with a door (11), comprising a lock mounted in the household appliance body (12), a shaped element (8) located on the door (11) of the household appliance and an element that exerts a constant pressure on the closed door (11) in the direction of its opening, located between the body (12) and the door (11) of the household appliance, characterized in that the lock consists of a rigid base (1), a pair of closing arms (2), two helical pressing springs (4), whose ends are mounted respectively to the rear (2b) part of the closing arm (2) and the adjacent to the arm (2) side wall (1a) of the base (1), wherein the closing arms (2 ) are mounted pivotally on a common axle (3) built in the base (1) and are intersecting each other in the place of mounting, and at the same the free sections of the front parts (2a) of the closing arms (2) have hook-shaped ends and form a clamps extending below the base (1) of the lock, which, when closing and opening the door (11) of the household appliance, cooperate with a shaped element which is is a pin (8) being an integral part of the strip of the door (9), whereas and between the ends (2c) of the rear portions (2b) of the closing arms (2) there is a cam (5), which cam (5) is mounted on an driving shaft (6) causing the cam (5) to rotate so that during a rotation of the cam (5) by the driving shaft (6) by an angle of 180°, the closing arms 2 are temporarily opened and the pin (8) is released, and the lock also contains a cam position sensor (7), which allows the driving shaft (6) to be turned on and off after the cam (5) reaches the correct angular position.
  2. Household appliance with a door opening mechanism, according to claim 1, characterized in that the pin (8) has a shape of a deltoid with rounded vertices.
  3. Household appliance with a door opening mechanism, according to claim 2, characterized in that the pin (8) is located so that its long sides (8a) are directed towards the body (12) of the household appliance.
EP19765819.8A 2018-08-22 2019-08-09 Household appliance with a door opening mechanism Active EP3841268B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL426775A PL236503B1 (en) 2018-08-22 2018-08-22 Mechanism opening the door of a household appliance, in particular of an oven
PCT/PL2019/000065 WO2020040653A1 (en) 2018-08-22 2019-08-09 Door opening mechanism for a household appliance, in particular an oven

Publications (2)

Publication Number Publication Date
EP3841268A1 EP3841268A1 (en) 2021-06-30
EP3841268B1 true EP3841268B1 (en) 2022-12-14

Family

ID=67902567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19765819.8A Active EP3841268B1 (en) 2018-08-22 2019-08-09 Household appliance with a door opening mechanism

Country Status (4)

Country Link
EP (1) EP3841268B1 (en)
DK (1) DK3841268T3 (en)
PL (2) PL236503B1 (en)
WO (1) WO2020040653A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502607A (en) * 1945-12-13 1950-04-04 Manitowoc Shipbuilding Company Latch
FR1213804A (en) * 1958-10-28 1960-04-04 Dubois & Cie Automatically operated lock, especially for refrigerated cabinets and similar applications
US7036853B2 (en) * 2003-12-08 2006-05-02 Emerson Electric Co. Motorized oven lock for sealing 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
US20080036217A1 (en) * 2006-08-10 2008-02-14 Ching-Hsiang Wang Double door hook for an oven
IT1404221B1 (en) 2011-01-24 2013-11-15 Bitron Spa DOOR-LOCK DEVICE FOR A DOOR OF A HOUSEHOLD APPLIANCE
DE102011011662B4 (en) * 2011-02-18 2018-09-20 Emz-Hanauer Gmbh & Co. Kgaa Dishwasher with a door lock

Also Published As

Publication number Publication date
WO2020040653A1 (en) 2020-02-27
DK3841268T3 (en) 2023-03-20
PL3841268T3 (en) 2023-04-11
PL236503B1 (en) 2021-01-25
EP3841268A1 (en) 2021-06-30

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