EP1102519A1 - Schnellsperrvorrichtung, insbesondere für die Tür eines Mikrowellenofens - Google Patents

Schnellsperrvorrichtung, insbesondere für die Tür eines Mikrowellenofens Download PDF

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Publication number
EP1102519A1
EP1102519A1 EP00403198A EP00403198A EP1102519A1 EP 1102519 A1 EP1102519 A1 EP 1102519A1 EP 00403198 A EP00403198 A EP 00403198A EP 00403198 A EP00403198 A EP 00403198A EP 1102519 A1 EP1102519 A1 EP 1102519A1
Authority
EP
European Patent Office
Prior art keywords
locking
unit
stable
closing unit
locking member
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
EP00403198A
Other languages
English (en)
French (fr)
Other versions
EP1102519B1 (de
Inventor
André Vanneyre
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.)
Noalia Solutions SA
Original Assignee
Crouzet Appliance Controls 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 Crouzet Appliance Controls SA filed Critical Crouzet Appliance Controls SA
Publication of EP1102519A1 publication Critical patent/EP1102519A1/de
Application granted granted Critical
Publication of EP1102519B1 publication Critical patent/EP1102519B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • H05B6/6417—Door interlocks of the microwave heating apparatus and related circuits

Definitions

  • closure assemblies comprising such elements, used for example in microwave ovens.
  • the first part is constituted by the door of the oven and the second part by the structure of this oven.
  • the unit of closure is mounted on the oven structure and oscillates from one to the other of its stable stop positions under the action of a finger door integral actuation.
  • This finger constitutes both first actuation means, and a door blocking means by its cooperation with the closing unit when the door is in closed position.
  • the finger actuation drives the closing unit in its second stable position, and this unit in turn keeps the door in position closed due to the stability of this position.
  • the finger swings the closing unit beyond from an unstable equilibrium position, tilting continues from itself to the first stable stop position. The unit of closing then remains in this position until closing next to the door.
  • the present invention aims to overcome this drawback.
  • the invention aims to provide a quick locking device from one part to another, and including a microwave oven door on the structure of this oven.
  • the invention also aims to avoid any leakage of waves a microwave oven for the duration of its operation.
  • the invention also aims to ensure locking from one room to another with low electricity consumption, silently, and without overheating.
  • the device according to the invention therefore not only ensures a blocking of the first part on the second, in particular of the door of a microwave oven in closed position on the structure of this oven, using the bistable closing unit, but also a lock in this position.
  • This locking is achieved by through the closing unit, the first of which locking cooperates with the second locking member of the locking unit when the latter is brought into position locking by the second actuation means activated by their means of control.
  • the second actuating means include an electric current motor continuous and transmission means to transmit the movement of the motor shaft to the second locking member.
  • a direct current electric motor associated with a suitable reducer can provide a significant torque which is transmitted to the locking unit, preventing the latter from leaving his second stable position. This significant torque is also obtained without excessive heating and silently, even with a high supply current, for example of the order of 1 amp under a voltage of 12 volts.
  • a DC motor can be powered directly by a microprocessor.
  • the second actuation means can also include elastic return means
  • the device according to the invention comprises a seal between the first room and the second room, the first and second locking members being arranged to tend to drive the unit closing away from its first stable position from its second stable position when the second locking member is in the locked position, so as to compress the seal sealing when the first part and the second part are in closed position.
  • the safety of use is better ensured due to the presence of the seal. It is compressed by the action of the second locking member. Any wave leakage is thus prevented.
  • the unit of closure includes a fork rotatably mounted on one of parts, elastic means being provided for pressing said fork in either direction away from a position of unstable equilibrium.
  • the first means of actuation may include an actuating finger mounted on one of the parts and arranged to cooperate with an element of the unit movable closure on the other part between two positions stable stops.
  • the actuating finger can be arranged to engage between the branches of the fork and push a first fork leg when the first part is brought from an open position relative to the second part at its closed position relative to the second piece, and to pull a second fork leg when the first part is brought from its closed position relative to the second part to a open position relative to the second part.
  • the second branch of the fork can be arranged to be in abutment on the actuating finger when the closing unit is in its second stable position.
  • the locking unit comprises a first contact surface arranged to come to the contact of a second contact surface of the closing unit when the closing unit is in its second stable position and that the second locking member is in the position of locking.
  • the second contact surface can be fitted on a third branch of the fork.
  • the invention also relates to a microwave oven characterized by the fact that it includes a locking device such as described above.
  • microwave oven may include microwave tube, control means can be arranged to bring the second organ of locked in its locked position when the microwave tube is activated.
  • the oven according to the invention is automatically locked when it is started.
  • control means can be arranged to maintain an electric current in the motor direct current as long as the microwave tube is activated.
  • the door of the microwave oven according to the invention is thus kept locked during the entire operating time of the oven.
  • the subject of the invention is a method for locking the door of a microwave oven on the structure of this oven, which oven has a microwave tube and a gasket between the door and the structure, this process can further include a step of maintaining the second locking member applied against the first locking member lockout for the entire time the microwave tube is activated, so as to compress the seal during this entire duration.
  • FIG. 1 the door 1 of the microwave oven and the structure 2 comprising the frame of this door.
  • a seal 3 disposed at the periphery of the door 1 seals the inside the oven relative to the outside of the oven when door 1 is closed.
  • Structure 2 essentially supports, with regard to the invention, a closing unit 4 and a locking unit 5.
  • the door 1 supports an actuating finger 6.
  • the closing unit 4 comprises a fork 7 and a spring helical return 8 for this fork 7.
  • the fork 7 is mounted rotating about an axis 9 on the structure 2, near door frame 1.
  • the fork 7 has three branches 10, 11 and 12 oriented generally in the same direction, and a lever arm 13 oriented usually in the opposite direction.
  • the outer branch 10 of the fork 7 is closest to the door 1 and the outer branch 12 is the most distant.
  • the middle branch 11 is substantially in the extension of the lever arm 13.
  • the return spring 8 is in compression with one of its ends resting on the free end of the lever arm 13 and its other end bearing on a stop 14 integral with the structure 2. Ball joints are provided at both ends for allow a certain angular movement of the spring.
  • the free end of the lever arm 13 is generally disposed between the axis 9 of rotation of the fork 7 and the stop 14.
  • the return spring 8 always tends to separate the fork 7 from a unstable equilibrium position in which the free end of the lever 13, the axis 9 of rotation of the fork 7 and the stop 14 are aligned.
  • the locking unit 5 comprises an electric motor 17 to direct current, a toothed wheel 18 meshing with the output axis 19 of the motor 17, and a pivoting lever 20 having a toothed sector 21 meshing with a pinion 22 coaxial with, and integral with, the wheel toothed 18.
  • the motor 17, the axis of rotation 23 of the toothed wheel 18 and the pivot axis 24 of the lever 20 are mounted on the structure 2.
  • a return spring 25 has one of its ends fixed to the structure 2 and its other end fixed to the end of the lever 20 opposite the toothed sector 21. This spring 25 acts here in tension and is arranged to rotate the lever in the direction of the arrow F3 and therefore to bring the end of the lever 20 opposite the sector toothed 21 away from the closing unit 4.
  • the motor 17 is powered so as to rotate the lever 20 in the opposite direction to that of arrow F3.
  • the lever 20 is retained at the gap of the fork 7 by the return spring 25.
  • the motor electric 17 is not energized and therefore does not provide any torque.
  • control electronics 28 (FIG. 5), essentially constituted a microprocessor, on the one hand activates the microwave tube of the oven (not shown), and on the other hand locks the door.
  • a regulated current in a first phase of 40 ms at a value of 1 A is brought to supply the motor 17.
  • the current in motor 17 is canceled.
  • the current is brought back to the value of 0.4 A during the entire period of use of the oven, during which the door therefore remains locked.
  • the microwave tube stops to be powered, as is the motor 17.
  • the return spring 25 causes the lever to pivot in the direction arrow F3 and therefore the release of the fork 7.
  • the invention therefore ensures a positive locking of the door of the oven. This locking is accompanied by compression of a seal peripheral seal at the door, and lasts as long as using the oven.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
EP20000403198 1999-11-16 2000-11-16 Schnellsperrvorrichtung, insbesondere für die Tür eines Mikrowellenofens Expired - Lifetime EP1102519B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9914367 1999-11-16
FR9914367A FR2801096B1 (fr) 1999-11-16 1999-11-16 Dispositif de verrouillage rapide, notamment pour porte de four a micro-ondes

Publications (2)

Publication Number Publication Date
EP1102519A1 true EP1102519A1 (de) 2001-05-23
EP1102519B1 EP1102519B1 (de) 2005-01-12

Family

ID=9552151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000403198 Expired - Lifetime EP1102519B1 (de) 1999-11-16 2000-11-16 Schnellsperrvorrichtung, insbesondere für die Tür eines Mikrowellenofens

Country Status (3)

Country Link
EP (1) EP1102519B1 (de)
DE (1) DE60017340T2 (de)
FR (1) FR2801096B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007056489A1 (en) * 2005-11-09 2007-05-18 Turbochef Technologies, Inc. Combination switch
CN105737221A (zh) * 2016-05-16 2016-07-06 南宁市茂宏信息技术有限公司 一种防误开门的微波炉

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023005294A1 (zh) * 2021-07-29 2023-02-02 广东美的厨房电器制造有限公司 门锁装置、开关门机构、联锁机构、开关门组件和家用电器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749835A (en) * 1986-03-20 1988-06-07 Sharp Kabushiki Kaisha Mechanism for closing microwave oven door
US5300745A (en) * 1991-01-25 1994-04-05 Moulinex (Societe Anonyme) Apparatus for placing a microwave oven in a standby condition
US5512735A (en) * 1993-09-14 1996-04-30 Funai Electric Co., Ltd. Electric cooking range having new safety features

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749835A (en) * 1986-03-20 1988-06-07 Sharp Kabushiki Kaisha Mechanism for closing microwave oven door
US5300745A (en) * 1991-01-25 1994-04-05 Moulinex (Societe Anonyme) Apparatus for placing a microwave oven in a standby condition
US5512735A (en) * 1993-09-14 1996-04-30 Funai Electric Co., Ltd. Electric cooking range having new safety features

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007056489A1 (en) * 2005-11-09 2007-05-18 Turbochef Technologies, Inc. Combination switch
US7956304B2 (en) 2005-11-09 2011-06-07 Turbochef Technologies, Inc. Combination switch
CN105737221A (zh) * 2016-05-16 2016-07-06 南宁市茂宏信息技术有限公司 一种防误开门的微波炉

Also Published As

Publication number Publication date
EP1102519B1 (de) 2005-01-12
FR2801096A1 (fr) 2001-05-18
DE60017340T2 (de) 2006-03-30
FR2801096B1 (fr) 2002-01-11
DE60017340D1 (de) 2005-02-17

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