EP2840208A1 - A locking device and a domestic appliance - Google Patents

A locking device and a domestic appliance Download PDF

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Publication number
EP2840208A1
EP2840208A1 EP13180805.7A EP13180805A EP2840208A1 EP 2840208 A1 EP2840208 A1 EP 2840208A1 EP 13180805 A EP13180805 A EP 13180805A EP 2840208 A1 EP2840208 A1 EP 2840208A1
Authority
EP
European Patent Office
Prior art keywords
locking device
casing
path
wheel
door
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
EP13180805.7A
Other languages
German (de)
French (fr)
Other versions
EP2840208B1 (en
Inventor
Francesco Lampitelli
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 EP13180805.7A priority Critical patent/EP2840208B1/en
Publication of EP2840208A1 publication Critical patent/EP2840208A1/en
Application granted granted Critical
Publication of EP2840208B1 publication Critical patent/EP2840208B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E05C19/022—Released by pushing in the closing direction
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12—Casings; Tubs
    • D06F39/14—Doors or covers; Securing means therefor
    • 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
    • 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
    • E05C19/024—Automatic catches, i.e. released by pull or pressure on the wing with a bifurcated latch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details

Definitions

  • the present invention relates to a locking device for domestic appliance. Further, the present invention relates to a domestic appliance including a locking device.
  • Many domestic appliances comprise a cabinet with an opening and a door for covering and closing said opening.
  • the door includes a handle or the like for opening and closing the door by a user.
  • the handle sticks out from the door and increases the dimensions of said door. It would be advantageous, if the handle sticking out from the door could be avoided, so that the dimensions of the door are minimized.
  • WO 2011/132213 A1 discloses a push-pull locking device for the door of a washing and drying machine.
  • the locking device includes a body of containment housing a locking wheel for a door latch.
  • a sliding bolt is capable of preventing the rotation of the wheel.
  • a time-delay mechanism is fitted with a locking pawl for said sliding bolt.
  • the wheel is fitted with a cavity that presents a surface tilted with respect to the plane of rotation. The force exerting to the bolt is resolved, when the door is pulled, while the locking device is in a closed and locked position.
  • WO 2009/116094 A1 discloses an oven including a bottom-hinged door without handle.
  • the door is provided with a locking and releasing mechanism, e.g. a push-pull, push-push or a touch latch, located on the door and on the body of the oven.
  • a device for rotating the door open and slowly down is suited to make the door open, when it is released and to damp the movement of the door during its total opening move.
  • the locking and releasing mechanism is activated by control means on the outer side of the door or on the control panel of the oven or by electric mechanisms operated by a remote control.
  • DE 198 25 324 A1 discloses a household appliance with a movable part like a drawer including a closure device.
  • the closure device holds the drawer in a rear end position against the force of the spring.
  • the closure device includes an element with a predetermined path. A manual push or pressure opens the drawer. Then the drawer is moved outwards by the spring force. If the drawer is completely inserted by a manual pushing, then said drawer is snapped in with the closure device, so that the drawer is closed and remains in its rear end position.
  • the present invention relates to locking device for a domestic appliance, said locking device is provided for opening and closing a door or a drawer at a cabinet of the domestic appliance and comprises:
  • the main idea of the present invention is the arrangement and interaction of the wheel element, the path element and the spring elements.
  • the locking device allows a push-push system for opening and closing the door or drawer.
  • a handle is not required, so that the door or the front of the drawer may have a flat form.
  • the casing is subdivided into a main casing and a lateral casing.
  • the main casing and the lateral casing are connected or connectable by at least one snap-in mechanism.
  • the wheel element is arranged in the main casing, while the path element may be arranged in the lateral casing.
  • first spring element may be arranged in the main casing, while the second spring element may be arranged in the lateral casing.
  • the first spring element is a torsion spring element.
  • the second spring element is also torsion spring element.
  • the second spring element may be an extension spring element.
  • the casing, the main casing and/or the lateral casing are made of plastics.
  • the rotation and/or displacement of the path element may be limited by a mechanical lock element.
  • the rotation and/or displacement of the path element may be guided by a cam.
  • the present invention relates to a domestic appliance including a cabinet, a door for closing an opening said cabinet and/or a drawer inserted in or insertable into the cabinet, and a locking device for locking the door and/or the drawer, respectively, at the cabinet, wherein the domestic appliance includes the locking device mentioned above.
  • the locking device is mounted inside a column of the door.
  • the locking device is mounted inside a plastic column of the door.
  • FIG 1 illustrates a perspective front view of a locking device according to a first embodiment of the present invention.
  • the locking device includes a main casing 10 and a lateral casing 12.
  • the main casing 10 and the lateral casing 12 are connected by a snap-in mechanism.
  • the main casing 10 comprises a recess 14 for receiving a hook element 16.
  • FIG 2 illustrates a perspective rear view of the locking device according to the first embodiment of the present invention.
  • a wheel element 18 and a first torsion spring element 20 are arranged inside the main casing 10.
  • the wheel element 18 is rotatable within the main casing 10 around a rotational axis. In FIG 2 the rotational axis extends horizontally.
  • the first torsion spring element 20 interacts between the wheel element 18 and the main casing 10.
  • the first torsion spring element 20 effects a clockwise rotation of the wheel element 18.
  • a pin element 28 is attached at the wheel element 18.
  • the pin element 28 is arranged in an outer portion of the wheel element 18.
  • the pin element 28 has a cylindrical shape.
  • the elongated axis of the pin element 28 extends in parallel to the rotational axis of the wheel element 18.
  • FIG 3 illustrates a further perspective rear view of the locking device according to the first embodiment of the present invention.
  • a path element 22 and a second torsion spring element 24 are arranged inside the lateral casing 12.
  • the path element 22 is pivotable within the lateral casing 12 around a horizontal axis.
  • the second torsion spring element 24 interacts between the path element 22 and the lateral casing 12.
  • the second torsion spring element 24 effects a counter-clockwise rotation of the path element 22.
  • FIG 4 illustrates an exploded perspective rear view of the locking device according to the first embodiment of the present invention.
  • the path element 22 is formed as a disk.
  • One of the two large-area sides of the path element 22 is arranged face to face with the main casing 10 and includes a path 26.
  • the path 26 is formed as a closed groove in said large-area side of the path element 22.
  • the path 26 is formed as an approximately heart-shaped groove.
  • the pin element 28 attached at the wheel element 18 moves along the path 26 of the path element 22.
  • FIG 5 illustrates a perspective view of a domestic appliance 30 including the locking device according to the present invention.
  • the domestic appliance 30 comprises a cabinet 32 and a door 34.
  • the cabinet 32 includes an open front side closable by the door 34.
  • the door 34 is connected to the cabinet 32 via a hinge. In this example, the door 34 is pivoting at the cabinet 32 around a vertical axis.
  • the domestic appliance 30 may be a cooking oven, a refrigerator or the like.
  • the locking device is mounted in an inner column of the door 34.
  • the inner column is made of plastics.
  • FIG 6 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention.
  • the state of the locking device in FIG 6 corresponds with an open door 34 of the domestic appliance 30.
  • the hook element 16 is outside of the locking device.
  • the pin element 28 attached at the wheel element 18 is inserted in the path 26 of the path element 22.
  • FIG 7 to FIG 12 shows the states of the locking device during the closing of the door 34.
  • FIG 7 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of closing said locking device.
  • FIG 8 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of closing said locking device.
  • the hook element 16 has been moved a little bit into the recess 14, while the wheel element 18 has rotated counter-clockwise.
  • the pin element 28 has followed a little bit the path 26 of the path element 22.
  • FIG 9 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of closing said locking device.
  • the force of the second torsion spring element 24 effects the counter-clockwise rotation of the path element 22.
  • the force of the second torsion spring element 24 and the shape of the path 22 bring the locking device into the closed state.
  • FIGS 10 to FIG 12 show the further process of closing the locking device.
  • FIG 10 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of closing said locking device.
  • FIG 11 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of closing said locking device.
  • FIG 12 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of closing said locking device. In this position the locking device is blocked.
  • FIG 13 to FIG 20 shows the states of the locking device during the opening of the door 34.
  • the user For opening the door 34 the user has to push on the door 34.
  • FIG 13 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of opening said locking device.
  • FIG 14 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of opening said locking device.
  • the pin element 28 takes a start position. This movement is guaranteed by the first torsion spring element 20. In this step, the hook element 16 is at most inserted in the recess 14.
  • FIG 15 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of opening said locking device.
  • the force of the first torsion spring element 20 rotates the wheel element 18 clockwise.
  • the pin element 28 moves within the path 22 of the path element 22.
  • the path element 22 rotates until it is blocked by a mechanical lock element 38. Then, the path element 22 translates vertically controlled by a cam 40.
  • FIG 16 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of opening said locking device.
  • FIG 16 shows that the movements of the cam 40 and the pin element 28 are controlled by long slots formed in the main casing 10.
  • FIG 17 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of opening said locking device.
  • the door 34 is open.
  • the pin element 28 returns to a position within the path 26 by the force of the second torsion spring element 24.
  • FIG 18 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of opening said locking device.
  • FIG 19 illustrates a perspective rear view of the locking device according to a second embodiment of the present invention.
  • the second embodiment of the locking device has substantially the same structure as the first embodiment.
  • the second embodiment of the locking device includes an extension spring element 36 instead of the second torsion spring element 24.
  • the extension spring element 36 allows very constant properties during tits life cycle.
  • the locking device allows a push-push system for opening and closing the door 34.
  • a handle is not required, so that the door 34 may have a flat form.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Drawers Of Furniture (AREA)

Abstract

The present invention relates to a locking device for a domestic appliance. Said locking device is provided for opening and closing a door (34) or a drawer at a cabinet (32) of the domestic appliance and comprises at least one casing (10, 12), a wheel element (18) rotatable within the casing (10) around a rotational axis, a first spring element (20) effecting a rotation of the wheel element (18) into a predetermined sense of rotation, and at least one elongated pin element (28) attached at the wheel element (18), wherein the longitudinal axis of said pin element (28) extends parallel to the rotational axis of the wheel element (18). The locking device comprises further a path element (22) formed as a disk and arranged parallel to the wheel element (18), wherein a large-area side of the path element (22) includes a path (26) for receiving and guiding an open end of the pin element (28), a second spring element (24; 36) effecting a rotation of the path element (22) in the predetermined sense of rotation and/or a displacement of the path element (22), and at least one hook element (16) inserted or insertable into a recess (14) of the casing (10, 12) and engaged or engageable with the wheel element (18). The hook element (16) is engageable with the wheel element (18) by pushing the casing (10, 12) towards the hook element (16). The hook element (16) is detachable from the wheel element (18) and the recess (14) by pushing the casing (10, 12) towards the hook element (16). Further, the present invention relates to a domestic appliance including a locking device.

Description

  • The present invention relates to a locking device for domestic appliance. Further, the present invention relates to a domestic appliance including a locking device.
  • Many domestic appliances comprise a cabinet with an opening and a door for covering and closing said opening. Usually, the door includes a handle or the like for opening and closing the door by a user. However, the handle sticks out from the door and increases the dimensions of said door. It would be advantageous, if the handle sticking out from the door could be avoided, so that the dimensions of the door are minimized.
  • WO 2011/132213 A1 discloses a push-pull locking device for the door of a washing and drying machine. The locking device includes a body of containment housing a locking wheel for a door latch. A sliding bolt is capable of preventing the rotation of the wheel. A time-delay mechanism is fitted with a locking pawl for said sliding bolt. The wheel is fitted with a cavity that presents a surface tilted with respect to the plane of rotation. The force exerting to the bolt is resolved, when the door is pulled, while the locking device is in a closed and locked position.
  • WO 2009/116094 A1 discloses an oven including a bottom-hinged door without handle. The door is provided with a locking and releasing mechanism, e.g. a push-pull, push-push or a touch latch, located on the door and on the body of the oven. A device for rotating the door open and slowly down is suited to make the door open, when it is released and to damp the movement of the door during its total opening move. The locking and releasing mechanism is activated by control means on the outer side of the door or on the control panel of the oven or by electric mechanisms operated by a remote control.
  • DE 198 25 324 A1 discloses a household appliance with a movable part like a drawer including a closure device. The closure device holds the drawer in a rear end position against the force of the spring. The closure device includes an element with a predetermined path. A manual push or pressure opens the drawer. Then the drawer is moved outwards by the spring force. If the drawer is completely inserted by a manual pushing, then said drawer is snapped in with the closure device, so that the drawer is closed and remains in its rear end position.
  • It is an object of the present invention to provide an improved locking device for opening and closing the door of a domestic appliance.
  • This is achieved by the locking device according to claim 1.
  • The present invention relates to locking device for a domestic appliance, said locking device is provided for opening and closing a door or a drawer at a cabinet of the domestic appliance and comprises:
    • at least one casing,
    • a wheel element rotatable within the casing around a rotational axis,
    • a first spring element effecting a rotation of the wheel element into a predetermined sense of rotation,
    • at least one elongated pin element attached at the wheel element, wherein the longitudinal axis of said pin element extends parallel to the rotational axis of the wheel element,
    • a path element formed as a disk and arranged parallel to the wheel element, wherein a large-area side of the path element includes a path for receiving and guiding an open end of the pin element,
    • a second spring element effecting a rotation of the path element in the predetermined sense of rotation and/or a displacement of the path element, and
    • at least one hook element inserted or insertable into a recess of the casing and engaged or engageable with the wheel element, wherein
    • the hook element is engageable with the wheel element by pushing the casing towards the hook element, and wherein
    • the hook element is detachable from the wheel element and the recess by pushing the casing towards the hook element.
  • The main idea of the present invention is the arrangement and interaction of the wheel element, the path element and the spring elements. The locking device allows a push-push system for opening and closing the door or drawer. A handle is not required, so that the door or the front of the drawer may have a flat form.
  • In particular, the casing is subdivided into a main casing and a lateral casing.
  • For example, the main casing and the lateral casing are connected or connectable by at least one snap-in mechanism.
  • Preferably, the wheel element is arranged in the main casing, while the path element may be arranged in the lateral casing.
  • In similar way, the first spring element may be arranged in the main casing, while the second spring element may be arranged in the lateral casing.
  • In particular, the first spring element is a torsion spring element.
  • For example, the second spring element is also torsion spring element.
  • Alternatively, the second spring element may be an extension spring element.
  • Preferably, the casing, the main casing and/or the lateral casing are made of plastics.
  • Further, the rotation and/or displacement of the path element may be limited by a mechanical lock element.
  • Moreover, the rotation and/or displacement of the path element may be guided by a cam.
  • Further, the present invention relates to a domestic appliance including a cabinet, a door for closing an opening said cabinet and/or a drawer inserted in or insertable into the cabinet, and a locking device for locking the door and/or the drawer, respectively, at the cabinet, wherein the domestic appliance includes the locking device mentioned above.
  • Preferably, the locking device is mounted inside a column of the door. In particular, the locking device is mounted inside a plastic column of the door.
  • Novel and inventive features of the present invention are set forth in the appended claims.
  • The present invention will be described in further detail with reference to the drawings, in which
    • FIG 1
    illustrates a perspective front view of a locking device according to a first embodiment of the present invention,
    FIG 2
    illustrates a perspective rear view of the locking device according to the first embodiment of the present invention,
    FIG 3
    illustrates a further perspective rear view of the locking device according to the first embodiment of the present invention,
    FIG 4
    illustrates an exploded perspective rear view of the locking device according to the first embodiment of the present invention,
    FIG 5
    illustrates a perspective view of a domestic appliance including the locking device according to the present invention,
    FIG 6
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention,
    FIG 7
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of closing said locking device,
    FIG 8
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of closing said locking device,
    FIG 9
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of closing said locking device,
    FIG 10
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of closing said locking device,
    FIG 11
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of closing said locking device,
    FIG 12
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of closing said locking device,
    FIG 13
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of opening said locking device,
    FIG 14
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of opening said locking device,
    FIG 15
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of opening said locking device,
    FIG 16
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of opening said locking device,
    FIG 17
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of opening said locking device,
    FIG 18
    illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of opening said locking device, and
    FIG 19
    illustrates a perspective rear view of the locking device according to a second embodiment of the present invention.
  • FIG 1 illustrates a perspective front view of a locking device according to a first embodiment of the present invention.
  • The locking device includes a main casing 10 and a lateral casing 12. The main casing 10 and the lateral casing 12 are connected by a snap-in mechanism. The main casing 10 comprises a recess 14 for receiving a hook element 16.
  • FIG 2 illustrates a perspective rear view of the locking device according to the first embodiment of the present invention.
  • A wheel element 18 and a first torsion spring element 20 are arranged inside the main casing 10. The wheel element 18 is rotatable within the main casing 10 around a rotational axis. In FIG 2 the rotational axis extends horizontally. The first torsion spring element 20 interacts between the wheel element 18 and the main casing 10. The first torsion spring element 20 effects a clockwise rotation of the wheel element 18.
  • A pin element 28 is attached at the wheel element 18. The pin element 28 is arranged in an outer portion of the wheel element 18. In this example, the pin element 28 has a cylindrical shape. The elongated axis of the pin element 28 extends in parallel to the rotational axis of the wheel element 18.
  • FIG 3 illustrates a further perspective rear view of the locking device according to the first embodiment of the present invention.
  • A path element 22 and a second torsion spring element 24 are arranged inside the lateral casing 12. The path element 22 is pivotable within the lateral casing 12 around a horizontal axis. The second torsion spring element 24 interacts between the path element 22 and the lateral casing 12. The second torsion spring element 24 effects a counter-clockwise rotation of the path element 22.
  • FIG 4 illustrates an exploded perspective rear view of the locking device according to the first embodiment of the present invention.
  • The path element 22 is formed as a disk. One of the two large-area sides of the path element 22 is arranged face to face with the main casing 10 and includes a path 26. The path 26 is formed as a closed groove in said large-area side of the path element 22. In this example, the path 26 is formed as an approximately heart-shaped groove. The pin element 28 attached at the wheel element 18 moves along the path 26 of the path element 22.
  • FIG 5 illustrates a perspective view of a domestic appliance 30 including the locking device according to the present invention.
  • The domestic appliance 30 comprises a cabinet 32 and a door 34. The cabinet 32 includes an open front side closable by the door 34. The door 34 is connected to the cabinet 32 via a hinge. In this example, the door 34 is pivoting at the cabinet 32 around a vertical axis. The domestic appliance 30 may be a cooking oven, a refrigerator or the like. The locking device is mounted in an inner column of the door 34. For example, the inner column is made of plastics.
  • FIG 6 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention.
  • The state of the locking device in FIG 6 corresponds with an open door 34 of the domestic appliance 30. The hook element 16 is outside of the locking device. The pin element 28 attached at the wheel element 18 is inserted in the path 26 of the path element 22.
  • FIG 7 to FIG 12 shows the states of the locking device during the closing of the door 34.
  • FIG 7 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of closing said locking device.
  • At the start of closing of the door 34 the hook element 16 is engaged with the wheel element 18. The wheel element 18 rotates counter-clockwise. The pin element 28 follows the path 26 of the path element 22.
  • FIG 8 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of closing said locking device.
  • The hook element 16 has been moved a little bit into the recess 14, while the wheel element 18 has rotated counter-clockwise. The pin element 28 has followed a little bit the path 26 of the path element 22.
  • FIG 9 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of closing said locking device.
  • In this step the force of the second torsion spring element 24 effects the counter-clockwise rotation of the path element 22. The force of the second torsion spring element 24 and the shape of the path 22 bring the locking device into the closed state.
  • FIGS 10 to FIG 12 show the further process of closing the locking device. FIG 10 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of closing said locking device. FIG 11 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of closing said locking device. FIG 12 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of closing said locking device. In this position the locking device is blocked.
  • FIG 13 to FIG 20 shows the states of the locking device during the opening of the door 34. For opening the door 34 the user has to push on the door 34.
  • FIG 13 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a first step of opening said locking device.
  • When the user pushes on the door 34, then the wheel element 18 performs a small clockwise rotation, while the pin element 28 moves a little bit within the path 22.
  • FIG 14 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a second step of opening said locking device.
  • When the user stops pushing and releases the door 34, then the pin element 28 takes a start position. This movement is guaranteed by the first torsion spring element 20. In this step, the hook element 16 is at most inserted in the recess 14.
  • FIG 15 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a third step of opening said locking device.
  • The force of the first torsion spring element 20 rotates the wheel element 18 clockwise. The pin element 28 moves within the path 22 of the path element 22. The path element 22 rotates until it is blocked by a mechanical lock element 38. Then, the path element 22 translates vertically controlled by a cam 40.
  • FIG 16 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fourth step of opening said locking device.
  • FIG 16 shows that the movements of the cam 40 and the pin element 28 are controlled by long slots formed in the main casing 10.
  • FIG 17 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a fifth step of opening said locking device.
  • In the fifth step the door 34 is open. The pin element 28 returns to a position within the path 26 by the force of the second torsion spring element 24.
  • FIG 18 illustrates an exploded perspective side view of the locking device according to the first embodiment of the present invention during a sixth step of opening said locking device.
  • In the sixth step the pin element 28 is in a start position again.
  • FIG 19 illustrates a perspective rear view of the locking device according to a second embodiment of the present invention.
  • The second embodiment of the locking device has substantially the same structure as the first embodiment. The second embodiment of the locking device includes an extension spring element 36 instead of the second torsion spring element 24. The extension spring element 36 allows very constant properties during tits life cycle.
  • The locking device according to the present invention allows a push-push system for opening and closing the door 34. A handle is not required, so that the door 34 may have a flat form. Although illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those precise embodiments, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.
    • List of reference numerals
    • 10
    main casing
    12
    lateral casing
    14
    recess
    16
    hook element
    18
    wheel element
    20
    first torsion spring element
    22
    path element
    24
    second torsion spring element
    26
    path
    28
    pin element
    30
    domestic appliance
    32
    cabinet
    34
    door
    36
    extension spring element
    38
    mechanical lock element
    40
    cam

Claims (15)

  1. A locking device for a domestic appliance, said locking device is provided for opening and closing a door (34) or a drawer at a cabinet (32) of the domestic appliance and comprises:
    - at least one casing (10, 12),
    - a wheel element (18) rotatable within the casing (10) around a rotational axis,
    - a first spring element (20) effecting a rotation of the wheel element (18) into a predetermined sense of rotation,
    - at least one elongated pin element (28) attached at the wheel element (18), wherein the longitudinal axis of said pin element (28) extends parallel to the rotational axis of the wheel element (18),
    - a path element (22) formed as a disk and arranged parallel to the wheel element (18), wherein a large-area side of the path element (22) includes a path (26) for receiving and guiding an open end of the pin element (28),
    - a second spring element (24; 36) effecting a rotation of the path element (22) in the predetermined sense of rotation and/or a displacement of the path element (22), and
    - at least one hook element (16) inserted or insertable into a recess (14) of the casing (10, 12) and engaged or engageable with the wheel element (18), wherein
    - the hook element (16) is engageable with the wheel element (18) by pushing the casing (10, 12) towards the hook element (16), and wherein
    - the hook element (16) is detachable from the wheel element (18) and the recess (14) by pushing the casing (10, 12) towards the hook element (16).
  2. The locking device according to claim 1,
    characterized in that
    the casing (10, 12) is subdivided into a main casing (10) and a lateral casing (12).
  3. The locking device according to claim 2,
    characterized in that
    the main casing (10) and the lateral casing (12) are connected or connectable by at least one snap-in mechanism.
  4. The locking device according to claim 2 or 3,
    characterized in that
    the wheel element (18) is arranged in the main casing (10).
  5. The locking device according to any one of the claims 2 to 4,
    characterized in that
    the path element (22) is arranged in the lateral casing (12).
  6. The locking device according to any one of the claims 2 to 5,
    characterized in that
    the first spring element (20) is arranged in the main casing (10).
  7. The locking device according to any one of the claims 2 to 6,
    characterized in that
    the second spring element (20; 36) is arranged in the lateral casing (12).
  8. The locking device according to any one of the preceding claims,
    characterized in that
    the first spring element is a torsion spring element (20).
  9. The locking device according to any one of the preceding claims,
    characterized in that
    the second spring element is a torsion spring element (24).
  10. The locking device according to any one of the claims 1 to 8,
    characterized in that
    the second spring element is an extension spring element (36).
  11. The locking device according to any one of the preceding claims,
    characterized in that
    the casing (10, 12), the main casing (10) and/or the lateral casing (12) are made of plastics.
  12. The locking device according to any one of the preceding claims,
    characterized in that
    the rotation and/or displacement of the path element (22) is limited by a mechanical lock element (38).
  13. The locking device according to any one of the preceding claims,
    characterized in that
    the rotation and/or displacement of the path element (22) is guided by a cam (40).
  14. A domestic appliance including a cabinet (32), a door (34) for closing an opening of said cabinet (32) and/or a drawer inserted in or insertable into the cabinet (32), and a locking device for locking the door (34) and/or the drawer, respectively, at the cabinet (32),
    characterized in that
    the domestic appliance includes the locking device according to any one of the claims 1 to 13.
  15. The domestic appliance according to claim 14,
    characterized in that
    the locking device is mounted inside a column of the door (34).
EP13180805.7A 2013-08-19 2013-08-19 A locking device and a domestic appliance Active EP2840208B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13180805.7A EP2840208B1 (en) 2013-08-19 2013-08-19 A locking device and a domestic appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13180805.7A EP2840208B1 (en) 2013-08-19 2013-08-19 A locking device and a domestic appliance

Publications (2)

Publication Number Publication Date
EP2840208A1 true EP2840208A1 (en) 2015-02-25
EP2840208B1 EP2840208B1 (en) 2018-10-10

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ID=48998509

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EP (1) EP2840208B1 (en)

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Publication number Priority date Publication date Assignee Title
CN104746982A (en) * 2015-03-26 2015-07-01 芜湖美的洗涤电器制造有限公司 Door lock mechanism for dish-washing machine and dish-washing machine
CN109652957A (en) * 2015-06-30 2019-04-19 Lg电子株式会社 Device for clothing processing
JP2020008213A (en) * 2018-07-06 2020-01-16 シャープ株式会社 Door driving device and refrigerator
US11236911B2 (en) * 2018-01-18 2022-02-01 Hti Technology And Industries, Inc. Push-to-open/signal-to-open appliance door latching system with an integrated locking device
EP4155491A1 (en) * 2021-09-23 2023-03-29 Titus d.o.o. Dekani Locking device, in particular for a caravan or mobile home
US12031361B2 (en) 2022-06-20 2024-07-09 HTI Technology & Industries, Inc. Push-to-open/signal-to-open appliance door latching system with an integrated locking device

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US4792165A (en) * 1987-09-17 1988-12-20 Futaba Kinzoku Kogyo Kabushiki Kaisha Push latch device
DE19825324A1 (en) 1998-06-05 1999-12-09 Bsh Bosch Siemens Hausgeraete Domestic equipment with a deployment body, e.g. a cooker or hob with a drawer
EP1785063A1 (en) * 2005-11-10 2007-05-16 Grass GmbH Device for opening and closing a movable furniture part and said furniture part
WO2009116094A1 (en) 2008-03-18 2009-09-24 Filippi S.R.L. Oven with bottom-hinged door with no handle
WO2010056062A2 (en) * 2008-11-17 2010-05-20 피케이텍시스템 주식회사 Home-bar locking device
WO2011132213A1 (en) 2010-04-21 2011-10-27 Elettrotecnica Rold S.R.L. Push-pull closing device
DE202011104824U1 (en) * 2011-08-25 2012-11-26 Grass Gmbh Device for the opening movement of a furniture part accommodated on a furniture carcass of a piece of furniture, in particular furniture part opening device
DE202011105059U1 (en) * 2011-08-31 2012-12-03 Kiekert Aktiengesellschaft Flap setting device

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Publication number Priority date Publication date Assignee Title
US4792165A (en) * 1987-09-17 1988-12-20 Futaba Kinzoku Kogyo Kabushiki Kaisha Push latch device
DE19825324A1 (en) 1998-06-05 1999-12-09 Bsh Bosch Siemens Hausgeraete Domestic equipment with a deployment body, e.g. a cooker or hob with a drawer
EP1785063A1 (en) * 2005-11-10 2007-05-16 Grass GmbH Device for opening and closing a movable furniture part and said furniture part
WO2009116094A1 (en) 2008-03-18 2009-09-24 Filippi S.R.L. Oven with bottom-hinged door with no handle
WO2010056062A2 (en) * 2008-11-17 2010-05-20 피케이텍시스템 주식회사 Home-bar locking device
WO2011132213A1 (en) 2010-04-21 2011-10-27 Elettrotecnica Rold S.R.L. Push-pull closing device
DE202011104824U1 (en) * 2011-08-25 2012-11-26 Grass Gmbh Device for the opening movement of a furniture part accommodated on a furniture carcass of a piece of furniture, in particular furniture part opening device
DE202011105059U1 (en) * 2011-08-31 2012-12-03 Kiekert Aktiengesellschaft Flap setting device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104746982A (en) * 2015-03-26 2015-07-01 芜湖美的洗涤电器制造有限公司 Door lock mechanism for dish-washing machine and dish-washing machine
CN109652957A (en) * 2015-06-30 2019-04-19 Lg电子株式会社 Device for clothing processing
US11326294B2 (en) 2015-06-30 2022-05-10 Lg Electronics Inc. Laundry treatment apparatus
US11236911B2 (en) * 2018-01-18 2022-02-01 Hti Technology And Industries, Inc. Push-to-open/signal-to-open appliance door latching system with an integrated locking device
JP2020008213A (en) * 2018-07-06 2020-01-16 シャープ株式会社 Door driving device and refrigerator
JP7043359B2 (en) 2018-07-06 2022-03-29 シャープ株式会社 Door drive and refrigerator
EP4155491A1 (en) * 2021-09-23 2023-03-29 Titus d.o.o. Dekani Locking device, in particular for a caravan or mobile home
US12031361B2 (en) 2022-06-20 2024-07-09 HTI Technology & Industries, Inc. Push-to-open/signal-to-open appliance door latching system with an integrated locking device

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