EP2851492A1 - Système de verrouillage - Google Patents

Système de verrouillage Download PDF

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Publication number
EP2851492A1
EP2851492A1 EP13185085.1A EP13185085A EP2851492A1 EP 2851492 A1 EP2851492 A1 EP 2851492A1 EP 13185085 A EP13185085 A EP 13185085A EP 2851492 A1 EP2851492 A1 EP 2851492A1
Authority
EP
European Patent Office
Prior art keywords
door
lock system
blocking
tilting position
oven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13185085.1A
Other languages
German (de)
English (en)
Inventor
Dietmar Hildner
Branko Ivanovic
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 EP13185085.1A priority Critical patent/EP2851492A1/fr
Publication of EP2851492A1 publication Critical patent/EP2851492A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/022—Latches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0052—Locks mounted on the "frame" cooperating with means on the "wing"
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/0014—Locks or fastenings for special use to prevent opening by children
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
    • E05C17/02—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means
    • E05C17/46—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means in which the wing or a member fixed thereon is engaged by a movable fastening member in a fixed position; in which a movable fastening member mounted on the wing engages a stationary member
    • E05C17/50—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means in which the wing or a member fixed thereon is engaged by a movable fastening member in a fixed position; in which a movable fastening member mounted on the wing engages a stationary member comprising a single pivoted securing member
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/14—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member rigid with the latch

Definitions

  • the present invention relates generally to the field of lock systems. More specifically, the present invention is related to a lock system for oven doors.
  • Ovens for food preparation are well-known in prior art.
  • Said ovens comprise an oven chassis forming an oven cavity with a cavity opening for receiving the food to be prepared.
  • the oven comprises a door for closing the cavity opening.
  • the oven door acts as thermal barrier to keep the heat energy in the cavity during operation of the oven.
  • oven doors are at least partially transparent in order to enable the user to control the process of foot preparation within the closed cavity.
  • the oven door may be pivotally mounted to the oven cavity by means of hinges which allow a movement of the oven door relative to the oven cavity. Also drawer-like doors adapted to be pulled-out of the oven are available in the market.
  • Typical oven doors are manually operated. They comprise a handle for applying manual force to the door to be opened.
  • lock systems are known in prior art.
  • the oven door lock comprises a lever, accessible from the oven front which can be rotated about a spindle mounted on the oven chassis.
  • a stop extending from the lever spindle to the inside of the oven has a free end. The stop rotates with the lever about the spindle.
  • the lever is in the active position when the stop free end obstructs the passage of a strike plate, located on the door perimeter, during door opening. This prevents the door being opened.
  • the inactive position is obtained by manual displacement of the lever towards the door handle so as to move the door away from the stop free end and free passage of the strike plate. The door can then be opened by pulling on the handle.
  • a drawback of the oven door lock is that a certain gap between the upper edge of the oven door and the control panel of the oven is needed to allow a fixing of the known oven door lock at existing typicalovens.
  • Especially modern ovens only comprise a small gap between the oven door and the surrounding oven parts, e.g. the control panel which does not allow an integration of the known door lock system.
  • door lock systems to be integrated in a small installation space have to be adjusted very accurately to obtain a sufficient locking performance. Due to the restricted installation space, the stop and the strike plate have to be flat, so the lock system may be overcome by applying a certain pulling force at the handle.
  • the invention relates to a lock system for a door of an oven comprising a fastening element mounted at the chassis of the oven and a blocking element with a blocking portion pivotally mounted at the fastening element, wherein the blocking element is adapted to be positioned in an activated tilting position in which the opening of the door is prohibited by the blocking element and a deactivated tilting position in which the opening of the door is allowed by the blocking element.
  • the blocking portion of the blocking element is located with respect to the opening direction of the door in front of the outer side of said door.
  • the lock system may be adapted and placed at the oven such, that the opening of the door can only be achieved by using both hands simultaneously, namely a first hand for grabbing the handle of the oven door and the further hand for actuating the lock system.
  • the blocking element is pivotally arranged about a rotational axis and the rotational axis is arranged with respect to the opening direction of the door in front of the outer side of said door.
  • the pivot point of the lock system is located in front of the front side of the oven.
  • the blocking element comprises a handle for manually actuating the blocking element.
  • Said handle may be also located in front of the front side of the oven. Said handle may be located opposite to the blocking portion.
  • the blocking element is constituted by a one-piece-element comprising a handle portion and the blocking portion.
  • the blocking element may be a plastic part manufactured by injection molding.
  • Said injection molded element may further comprise a recess for receiving a spring for biasing the blocking element into the activated tilting position.
  • the blocking portion comprises a tapered free end.
  • said free end comprises a wedge-like shape with the wedge tip at the free end of the blocking portion.
  • the free end of the blocking portion can be tilted upwardly form a slanted, downward orientated position in a horizontal or essential horizontal position and the door can pass through said blocking portion.
  • the free end of the blocking portion is constituted by a wedge-shaped portion comprising a first surface section facing the outer side of the door in the activated tilting position and a second surface section arranged on the side turned away from the outer side of the door in the activated tilting position, wherein the angle confined by the second surface section and the outer side of the door is greater than the angle confined by the first surface section and the outer side of the door.
  • the longitudinal direction of the blocking portion is slanted downwardly in the activated tilting position of the blocking element.
  • the longitudinal direction of the blocking portion and the vertical direction i.e. the plane in which the front side of the door is located confine an acute angle which opens upwardly. Said angle may be between 20° and 50°, for example 20°, 25°, 30°, 35°, 40°, 45° or 50° or any angle between 20° and 50°.
  • the free end of the blocking portion is constituted by a wedge-shaped portion comprising a first surface section facing the outer side of the door in the activated tilting position and a second surface section arranged on the side turned away from the outer side of the door in the activated tilting position, wherein the angle confined by the second surface section and the outer side of the door is between 45° and 85°, preferably between 50° and 70°, wherein the angle widens upwardly.
  • the second surface section serves a sliding surface for the upper edge of the door, wherein the blocking portion is lifted up by a sliding of the door at the second surface section.
  • the slanted orientation of the sliding surface leads to a low force necessary for lifting up the blocking portion, so the blocking portion can even be lifted up by an automatic soft close mechanism.
  • the free end of the blocking portion is constituted by a wedge-shaped portion comprising a first surface section facing the outer side of the door in the activated tilting position and a second surface section arranged on the side turned away from the outer side of the door in the activated tilting position, wherein the angle confined by the first surface section and the outer side of the door is between 0° and 40°, preferably between 10° and 30°, wherein the angle widens upwardly.
  • Said arrangement is advantageous because of the slanted orientation of the blocking portion the lock is strengthened when pulling the door against the blocking element located in the activated tilting position.
  • the blocking element is preloaded to the activated tilting position by means of a spring.
  • Said spring may, for example, be a compression or torsion spring.
  • the spring force is dimensioned such that tilting of the blocking element by abutting of the door against the second surface section of the blocking portion and lifting up said blocking portion by means of the closing force of an automatic close mechanism of the door is possible. Thereby the automatic close mechanism is not interfered or prevented by the lock system.
  • the lock system is adapted such that the activated tilting position of the blocking element is reinforced when trying to open the door in the activated state of the lock system. This is specifically obtained by the slanted position of the blocking element downwardly in the activated tilting position. Thereby a very high lock force is obtained.
  • the fastening element comprises a bracket-like shape.
  • the fastening element comprises a first bracket leg and a second bracket leg wherein the first bracket leg is arranged at the chassis of the oven and the free end of the second bracket leg is located in front of the door with respect to the opening direction of the door.
  • the blocking element may be adapted to be snapped onto the fastening element.
  • the lock system can be manufactured with reduced effort.
  • the second bracket leg of the fastening element comprises a recess through which the blocking portion passes through.
  • the invention refers to an oven for preparing food comprising an oven cavity with a cavity opening and at least one door adapted to cover the cavity opening, with a lock system for securing the closed state of the door, wherein the lock system is adapted according to anyone of the preceding embodiments.
  • Fig. 1 shows a lock system 1 arranged at an oven 2.
  • the oven 2 comprises a door 2.1 pivotally mounted at the oven chassis 2.2 or a drawer-like door adapted to be pulled-out of the oven 2.
  • the door 2.1 serves as a sealing element for an oven cavity. After the door 2.1 has been opened, the food to be prepared may be placed in the oven cavity and the door 2.1 is closed in order to obtain a sealed camber for the food preparing process.
  • a lock system 1 is arranged at the door 2.1 of the oven 2.
  • the lock system 1 comprises a fastening element 3 and at least one blocking element 4.
  • the fastening element 3 is adapted to attach the lock system 1 at the oven chassis 2.2. Said attachment may be realized by any fastening means, for example by means of screws, notchs or adhesive means.
  • the lock system 1 is arranged at the top side of the oven cavity 2.2.
  • the fastening element 3 is preferably formed by a bracket-like element with the first bracket leg 3.1 parallel or essentially parallel to the plane in which the door 2.1 is situated. Said first bracket leg 3.1 may be used to anchor the lock system 1 to the oven 2 by upper-mentioned fastening means.
  • the fastening element 3 further comprises a second bracket leg 3.2 extending perpendicular or essentially perpendicular to the first bracket leg 3.1.
  • the second bracket leg 3.2 partially extends through a gap formed between the upper edge 2.1.1 of the door 2.1 and the oven chassis 2.2, respectively, the control panel 2.3 of the oven 2.
  • the fastening element 3 may be fixed laterally at the oven chassis 2.2, for example at the side wall of the oven 2.
  • the fastening element 3 further comprises a free end 3.3 at the second bracket leg 3.2 which is located with respect to the opening direction OD of the door 2.1 in front of said door 2.1.
  • the fastening element 3 protrudes with its free end 3.3 beyond the plane in which the door 2 is located.
  • a hinge point for pivotally mounting the blocking element 4 at the fastening element 3 is provided in the area of the free end 3.3.
  • the blocking element 4 is pivotally mounted to the fastening element 3 by means of a bolt 7 building the rotational axis RA of the blocking element 4.
  • Said rotational axis RA may be a horizontal axis running parallel and horizontally spaced to the plane in which the door 2.1 is located.
  • the blocking element 4 may be formed by a one-piece element comprising a handle portion 4.2 for manually actuating the blocking element 4 and a blocking portion 4.1 which ensures the blocking of the oven door 2.1 in the activated state of the lock system 1.
  • the blocking element 4 is adapted such that a user is able to pivot the blocking element 4 by a given angle, namely from an activated tilting position 5a (shown in fig. 1 ) to a deactivated tilting position 5b shown in fig. 2 .
  • the lock system 1 may comprise a spring 6.
  • the blocking element 4 may comprise a recess 4.3 for receiving the spring 6.
  • Said spring 6 may be adapted to bias the blocking element 4 towards the activated tilting position 5a by means of its spring force.
  • the spring 6 may be a compression or torsion spring.
  • the blocking portion 4.1 of the blocking element 4 may be arranged with respect to the fastening element 3 such that in the activated tilting position 5a of the lock system 1 the free end 4.1.1 of the blocking portion 4.1 forms a mechanical stop for the door 2.1 to be opened.
  • a portion of the outer surface of the door 2.1 may rest against the free end 4.1.1 of the blocking portion 4.1. Thereby, the further opening of the door 2.1 is prevented because a further tilting of the blocking element 4 is prevented by said mechanical stop.
  • the whole blocking element 4 By actuating the blocking element 4 by means of the handle 4.2, the whole blocking element 4 may be tilted in the deactivated tilting position 5b thereby lifting the free end 4.1.1 of the blocking portion 4.1 up in order to unblock the door 2.1 ( fig. 2 ). Thereby the lock system 1 is deactivated and the door 2.1 may get opened.
  • the free end 4.1.1 of the blocking portion 4.1 is tapered, wherein the thickness of the blocking portion 4.1 decreases towards the free end 4.1.1.
  • the blocking portion 4.1 is a wedge-shaped portion with a wedge tip at the free end 4.1.1.
  • the wedge tip may be a pointed end or a rounded end.
  • the blocking portion 4.1 may comprise a first surface section 4.1.2 which faces the outer side of the door 2.1.
  • the door 2.1 may at least partially rest against said first surface section 4.1.2 when getting opened in the activated state of the lock system 1.
  • the first surface section 4.1.2 may be inclined with respect to a vertical plane in which the outer side of the door 2.1 is located.
  • the angle ⁇ confined by the first surface section 4.1.2 and the outer side of the door 2.1 may be between 0° and 40°, preferably between 10° and 30°.
  • the angle ⁇ may be 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35° or 40° or any angle between 0° and 40°.
  • the blocking portion 4.1 may comprise a second surface section 4.1.3 which is located opposite to the first surface section 4.1.2.
  • the second surface section 4.1.3 is located at the far side of the outer side of the door 2.1.
  • the second surface section 4.1.3 may be inclined by an angle ⁇ with respect to a vertical plane in which the outer side of the door 2.1 is located. Said angle ⁇ may also widen upwardly and may be greater than ⁇ ( ⁇ > ⁇ ).
  • the angle ⁇ confined by the second surface section 4.1.3 and the outer side of the door 2.1 may be between 45° and 80°, preferably between 50° and 70°.
  • the angle ⁇ may be 45°, 50°, 55°, 60°, 65°, 70°, 75° or 80° or any angle between 45° and 80°.
  • the slanting of the second surface section 4.1.3 is advantageous because, as shown in fig. 3 , lifting up of the blocking portion 4.1 by tilting the blocking element is facilitated essentially.
  • the blocking element 4 may return to the activated tilting position 5a wherein the blocking portion 4.1 is located within the movement space of the door 2.1.
  • the slanted second surface section 4.1.3 forms a sliding surface for the upper edge of the door 2.1.
  • the upper edge of the door 2.1 slides along the second surface section 4.1.3 leading to a lift-up of the blocking portion 4.1 by tilting the blocking element 4 around the rotational axis RA.
  • the mechanical force for closing the door 2.1 can be lowered.
  • the door 2.1 will not be stopped even by an automatic soft close function with a low closing speed, respectively, a low closing force.
  • the second bracket leg 3.2 of the fastening element 3 comprises a recess through which the blocking portion 4.1 passes through.
  • the fastening element 3 may be formed by a sheet-like, flat material. Said material may be any kind of metal preferably stainless steel. Said fastening element 3 may be formed by punching and bending out of a sheet of metal.
  • the fastening element 3 may comprise a portion for receiving the blocking element 4.
  • Said means may be formed by a pair of straps with at least one hole per each strap for receiving the bolt 7.
  • the blocking element 4 may than be snapped onto said bolt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
EP13185085.1A 2013-09-19 2013-09-19 Système de verrouillage Withdrawn EP2851492A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13185085.1A EP2851492A1 (fr) 2013-09-19 2013-09-19 Système de verrouillage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13185085.1A EP2851492A1 (fr) 2013-09-19 2013-09-19 Système de verrouillage

Publications (1)

Publication Number Publication Date
EP2851492A1 true EP2851492A1 (fr) 2015-03-25

Family

ID=49230558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13185085.1A Withdrawn EP2851492A1 (fr) 2013-09-19 2013-09-19 Système de verrouillage

Country Status (1)

Country Link
EP (1) EP2851492A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180163444A1 (en) * 2016-12-12 2018-06-14 Airbus Operations Gmbh Safeguarding arrangement
EP3388606A1 (fr) 2017-04-14 2018-10-17 Gorenje Gospodinjski aparati d.d. Dispositif de verrouillage de porte pour appareil ménager
US20180372328A1 (en) * 2016-02-01 2018-12-27 Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. Kitchen appliance comprising drawer
WO2023129051A1 (fr) * 2021-12-27 2023-07-06 Vestel Beyaz Esya Sanayi Ve Ticaret Anonim Sirketi Verrouillage enfant mécanique et appareil électroménager le comprenant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US423217A (en) * 1890-03-11 Fastener for the meeting-rails of sashes
US2816683A (en) * 1953-05-11 1957-12-17 Pullman Standard Car Mfg Co Hatch cover and lock
DE8137042U1 (de) * 1981-12-18 1982-03-18 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet
DE69705653T2 (de) 1996-03-12 2002-05-23 Brandt Cooking Saint Jean De L Sicherheitsvorrichtung zum Öffnen einer Backofentür
EP1235034A2 (fr) * 2001-02-23 2002-08-28 AEG Hausgeräte GmbH Dispositif de verrouillage d'une porte d'appareil ménager, en particulier d'une porte d'appareil de cuisson
US20110175374A1 (en) * 2010-01-15 2011-07-21 Hertrich Gregory P Secure latch assembly for drawers and doors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US423217A (en) * 1890-03-11 Fastener for the meeting-rails of sashes
US2816683A (en) * 1953-05-11 1957-12-17 Pullman Standard Car Mfg Co Hatch cover and lock
DE8137042U1 (de) * 1981-12-18 1982-03-18 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet
DE69705653T2 (de) 1996-03-12 2002-05-23 Brandt Cooking Saint Jean De L Sicherheitsvorrichtung zum Öffnen einer Backofentür
EP1235034A2 (fr) * 2001-02-23 2002-08-28 AEG Hausgeräte GmbH Dispositif de verrouillage d'une porte d'appareil ménager, en particulier d'une porte d'appareil de cuisson
US20110175374A1 (en) * 2010-01-15 2011-07-21 Hertrich Gregory P Secure latch assembly for drawers and doors

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180372328A1 (en) * 2016-02-01 2018-12-27 Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. Kitchen appliance comprising drawer
EP3412974A4 (fr) * 2016-02-01 2019-01-23 Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. Appareil de cuisine à tiroir
US10502432B2 (en) * 2016-02-01 2019-12-10 Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. Kitchen appliance comprising drawer
US20180163444A1 (en) * 2016-12-12 2018-06-14 Airbus Operations Gmbh Safeguarding arrangement
US10995529B2 (en) * 2016-12-12 2021-05-04 Airbus Operations Gmbh Safeguarding arrangement
EP3388606A1 (fr) 2017-04-14 2018-10-17 Gorenje Gospodinjski aparati d.d. Dispositif de verrouillage de porte pour appareil ménager
WO2023129051A1 (fr) * 2021-12-27 2023-07-06 Vestel Beyaz Esya Sanayi Ve Ticaret Anonim Sirketi Verrouillage enfant mécanique et appareil électroménager le comprenant

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