EP3841268A1 - Door opening mechanism for a household appliance, in particular an oven - Google Patents

Door opening mechanism for a household appliance, in particular an oven

Info

Publication number
EP3841268A1
EP3841268A1 EP19765819.8A EP19765819A EP3841268A1 EP 3841268 A1 EP3841268 A1 EP 3841268A1 EP 19765819 A EP19765819 A EP 19765819A EP 3841268 A1 EP3841268 A1 EP 3841268A1
Authority
EP
European Patent Office
Prior art keywords
door
appliance
lock
oven
base
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.)
Granted
Application number
EP19765819.8A
Other languages
German (de)
French (fr)
Other versions
EP3841268B1 (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

Links

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 is a door opening mechanism for a household appliance, oven in particular.
  • the mechanism allows for an automatic opening of the door of an oven or other household appliance, 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 thp 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.
  • the purpose of the invention is to develop a door opening mechanism for a household appliance, oven in particular, allowing automatic opening of the door while keeping the possibility to open them manually.
  • Door opening mechanism for a household appliance, oven in particular, consisting of a lock mounted in the body of the appliance, profile element located on the appliance door 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, a cam mounted on a drive shaft located between the rear parts of the closing arms and a cam position sensor.
  • Hookshaped 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.
  • 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 closer to the body of the 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 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 mechanism allows both automatic door opening and manual opening at any time of the appliance operation. Furthermore, the mechanism has a neat appearance and can be easily adapted to different types of the oven front.
  • fig. 1 shows the mechanism in the closed position in a perspective view
  • fig. 2 shows the mechanism in a closed position in a view from the top
  • fig. 3 shows cross-section A:A of the mechanism shown in fig. 2
  • fig. 4 shows the mechanism in side view
  • fig. 5 shows cross-section B:B shown in fig. 4 of the mechanism in the closed position
  • fig. 6 shows cross-section B:B shown in fig. 4 of the mechanism in the open position
  • fig. 7 shows a perspective view of the oven and the location of the lock clamps
  • fig. 8 shows detail A shown in figure 7
  • fig. 9 shows the oven door from the appliance body side
  • fig. 10 is a schematic drawing of the pin from the top with clenched clamps.
  • the door lock mechanism of a household appliance, oven in particular, according to the present invention located such that the lock 13 is mounted in the front panel of the body 12 of the 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 1 1 . Closing arms 2 cooperate with the pin 8 as results of opening and closing the door 1 1 .
  • 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 hookshaped ends forming clamps cooperating with the pin 8 located on the door 1 1 .
  • 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 1 a of the base 1 , on which they are based, while being mounted on a tongue located on this side wall 1 a.
  • 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 1 1 the force required to close them is reduced, and exert a force pressing the door 1 1 to the gasket.
  • a threshold force is required, and the door 1 1 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 1 1 between the door 1 1 and the body 12 to allow movement of the door 1 1 .
  • the lock is equipped with a cam position sensor 7, which enables and disables the drive 6 when the cam when it reaches five right angle.

Abstract

Door opening mechanism for a household appliance, oven in particular, comprising a lock mounted in the appliance body, profile element located on the door of the appliance and, located between the body and the door, element exerting on a closed door constant force in the direction of opening, characterized in that the lock consists of a rigid base (1), a pair of closing arms (2), two helical pressing springs (4), a cam (5) mounted on the drive shaft (6), and the cam position sensor (7), wherein the closing arms (2) are mounted pivotally on the same axle (3) built in the base (1) and are intersecting each other in the place of mounting, wherein 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 of the lock (1), while the profile element is a pin (8) comprising an integral part of the strip of the door (9).

Description

DOOR OPENING MECHANISM FOR A HOUSEHOLD APPLIANCE, IN PARTICULAR AN OVEN
The present invention is a door opening mechanism for a household appliance, oven in particular. The mechanism allows for an automatic opening of the door of an oven or other household appliance, 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 thp 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.
Known is also a solution described in the Polish patent no. PL216474 B1 , where the lock is located in the lock housing located on the body of a household appliance. The lock is equipped with closing arms, each mounted on a separate axis of rotation, free sections of which protrude from the housing and are pivoted to each other. The arms are received in the closing throat located in the door, where they enter upon closing. In the throat there are deflecting surfaces that cause the free sections of the arms being reclined relative to each other. However, it is not impossible to reverse this system and put the closing throat on the body of the appliance, and the lock on the door. The result of such design is, among others, allowing automatic opening of the door either by a screw mechanism driven by a motor that causes clamps closing or a pin on the actuator that pushes the door from 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 a door opening mechanism for a household appliance, oven in particular, allowing automatic opening of the door while keeping the possibility to open them manually.
Door opening mechanism for a household appliance, oven in particular, consisting of a lock mounted in the body of the appliance, profile element located on the appliance door 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, a cam mounted on a drive shaft located between the rear parts of the closing arms and a cam position sensor. Hookshaped 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. 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 closer to the body of the 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 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 mechanism allows both automatic door opening and manual opening at any time of the appliance operation. Furthermore, the mechanism has a neat appearance and can be easily adapted to different types of the oven front.
The subject matter of the invention in an example embodiment is shown in the figure, where fig. 1 shows the mechanism in the closed position in a perspective view, fig. 2 shows the mechanism in a closed position in a view from the top, fig. 3 shows cross-section A:A of the mechanism shown in fig. 2, fig. 4 shows the mechanism in side view, fig. 5 shows cross-section B:B shown in fig. 4 of the mechanism in the closed position, fig. 6 shows cross-section B:B shown in fig. 4 of the mechanism in the open position, fig. 7 shows a perspective view of the oven and the location of the lock clamps, fig. 8 shows detail A shown in figure 7, fig. 9 shows the oven door from the appliance body side, fig. 10 is a schematic drawing of the pin from the top with clenched clamps.
The door lock mechanism of a household appliance, oven in particular, according to the present invention located such that the lock 13 is mounted in the front panel of the body 12 of the 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 1 1 . Closing arms 2 cooperate with the pin 8 as results of opening and closing the door 1 1 . 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 hookshaped ends forming clamps cooperating with the pin 8 located on the door 1 1 . 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 1 a of the base 1 , on which they are based, while being mounted on a tongue located on this side wall 1 a. 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 1 1 the force required to close them is reduced, and exert a force pressing the door 1 1 to the gasket. To open the door 1 1 , a threshold force is required, and the door 1 1 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 1 1 between the door 1 1 and the body 12 to allow movement of the door 1 1 .
Furthermore, the lock is equipped with a cam position sensor 7, which enables and disables the drive 6 when the cam when it reaches five right angle.

Claims

Claims
1. Door opening mechanism for a household appliance, oven in particular, comprising a lock mounted in the appliance body, profile element located on the door of the appliance and, located between the body and the door, element exerting on a closed door constant force in the direction of opening, 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 ), a cam (5) mounted on the drive shaft (6) between the ends (2c) of the rear parts (2b) of the closing arms (2), and the cam position sensor (7), 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, wherein the free sections of the front parts (2a) of the closing arms (2) have hookshaped ends and form a clamps extending below the base of the lock ( 1 ), while the profile element is a pin (8) comprising an integral part of the strip of the door (9).
2. The opening mechanism of the household appliance door, oven in particular, according to claim 1 , characterized in that the pin (8) has a shape of a deltoid with rounded vertices.
3. The opening mechanism of the household appliance door, oven in particular, 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 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 true EP3841268A1 (en) 2021-06-30
EP3841268B1 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
PL3841268T3 (en) 2023-04-11
DK3841268T3 (en) 2023-03-20
PL236503B1 (en) 2021-01-25
WO2020040653A1 (en) 2020-02-27
EP3841268B1 (en) 2022-12-14

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