EP1453361A1 - Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz - Google Patents

Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz Download PDF

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Publication number
EP1453361A1
EP1453361A1 EP03011246A EP03011246A EP1453361A1 EP 1453361 A1 EP1453361 A1 EP 1453361A1 EP 03011246 A EP03011246 A EP 03011246A EP 03011246 A EP03011246 A EP 03011246A EP 1453361 A1 EP1453361 A1 EP 1453361A1
Authority
EP
European Patent Office
Prior art keywords
stopper
locking assembly
microwave oven
child
protecting
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
EP03011246A
Other languages
English (en)
French (fr)
Other versions
EP1453361B1 (de
Inventor
Man-Soo Lee
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
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 Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP1453361A1 publication Critical patent/EP1453361A1/de
Application granted granted Critical
Publication of EP1453361B1 publication Critical patent/EP1453361B1/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
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to a microwave oven, and more particularly, to a locking assembly of a microwave oven capable of preventing a child from operating the microwave oven, in which a stopper can swing within a range of predetermined angle by an operation of a switch so as to restrict a rotation of a timer knob.
  • a microwave oven is a cooking device which cooks food by using the microwave, which is widely used for cooking the food these days.
  • a magnetron In the microwave oven, a magnetron emits microwave to the food to allow the microwave to accelerate the molecular movement of the food, thereby cooking the food.
  • FIG. 1 is a perspective view of a microwave oven 10 according to the conventional art.
  • the microwave oven 10 includes a casing 12 having a cooking chamber therein and a door 14 pivotally installed thereto, a magnetron (not shown) which is disposed at a side portion of the casing 12, for emitting microwave to the cooking chamber to cook the food, and a control panel 16 which is attached to the front of the casing 12, through which a timer knob 20 and a power control knob 22 are respectively connected to a timer (not shown) and a power controller (not shown).
  • the food to be cooked is placed on a turntable (not shown) in the cooking chamber, and then the power control knob 22 is operated to control the intensity of microwave emitted from the magnetron. Further, the timer knob 20 is rotated to set the time to cook the food.
  • the microwave oven 10 operates so that the microwave is emitted from the magnetron to heat the food on the turntable.
  • a microwave oven having a locking device for protecting a child comprising: a casing having a cooking chamber therein and a door pivotally installed thereto; a magnetron which is disposed at a side portion of the casing, for emitting microwave to the cooking chamber to cook the food; a control panel which is attached to a front of the casing, through which a timer knob and a power control knob are respectively connected to a timer and a controller, the timer knob having a wedge-shaped groove on a periphery surface thereof; and a locking assembly which is mounted on a back surface of the control panel, for selectively locking a rotation of the timer knob.
  • the locking assembly includes a stopper which is installed to the back surface of the control panel to swing within a range of a predetermined angle and an elastic spring which comes in contact with the stopper, for supporting the stopper elastically.
  • the stopper has one end extending toward an oval through-hole formed in a sidewall of the control panel and the other end received by the wedge-shaped groove on the peripheral surface of the timer knob, which is distanced at a predetermined angle from the one end of the stopper to pivot about an axis of the stopper by operation of the one end of the stopper.
  • the elastic spring extends between mounting projections integrally formed on the back surface of the control panel, while coming in contact with the stopper elastically to provide elasticity for the stopper.
  • the stopper further includes a supporting plate which comes in tight contact with the stopper to receive the elasticity from the elastic spring.
  • the locking assembly further comprises a switch which receives the one end of the stopper, making the stopper to pivot about the axis of the stopper within the range of the predetermined angle.
  • the switch has flange portions which extend in parallel from a surface thereof to receive the one end of the stopper, and a handling portion which is projected from the other surface thereof to operate the switch.
  • a pair of restrictor is formed on an inner surface of the sidewall of the control panel to restrict an upward and downward movement of the switch.
  • the handling portion of the switch is disposed in the oval through-hole of the sidewall of the control panel to move upwardly and downwardly.
  • the stopper of the locking assembly is initially positioned so that one end of the stopper is inserted between the flange portions of the switch while the other end of the stopper is placed in the wedge-shaped groove on the peripheral surface of the timer knob.
  • the elastic spring urges the stopper not to rotate about its axis by an outer impact.
  • FIG. 2 is a perspective view of a microwave oven 100 having a locking assembly 160 for protecting a child according to the present invention, in which a door 120 is partially cut
  • FIG. 3 is an exploded perspective view of a control panel 130 of the microwave oven 100 having the locking assembly 160 for protecting the child according to the present invention.
  • the microwave oven 100 having the locking assembly for protecting the child comprises a casing 110 having a cooking chamber therein and a door 120 pivotally installed thereto, a magnetron (not shown) which is disposed at a side portion of the casing 110, for emitting microwave to the cooking chamber to cook the food, a control panel 130 which is attached to a front of the casing 110, through which a timer knob 140 and a power control knob 150 are respectively connected to a timer (not shown) and a power controller (not shown), the timer knob 140 having a wedge-shaped groove 144 on a periphery surface 142 thereof, and a locking assembly 160 which is mounted on a back surface 132 of the control panel 130, for selectively locking a rotation of the timer knob 140.
  • the casing 110 is made of synthetic resin or steel plate, which has a turntable (not shown) disposed in the cooking chamber to receive a dish or bowl in which food to be cooked is placed.
  • a door 120 which closes an opening of the casing 110 through which the dish or bowl having the food is placed in the cooking chamber.
  • the magnetron is disposed at a back of the control panel 130 and at a side of the cooking chamber to emit the microwave toward the food in the cooking chamber.
  • the microwave emitted from the magnetron is transmitted through a wave-guide (not shown) to the cooking chamber, which accelerates a molecular movement of the food in the dish or bowl, thereby cooking the food.
  • the control panel 130 is attached to a front portion of the casing 110, which has through holes 134 and 136 formed therein at a predetermined distance from each other.
  • the power control knob 150 and the timer knob 140 are respectively combined with the power controller (not shown) and the timer (not shown) to control the intensity of power of the magnetron and to set the time to operate the magnetron.
  • control panel 130 has an oval through-hole 138a formed at a sidewall 138 thereof in which a switch 162 is movably inserted to operate the locking assembly 160, as shown in FIGS. 2 and 3.
  • a pair of mounting projections 164a and 164b is integrally formed at a desired distance from each other on the back surface 132 of the control panel 130.
  • the mounting projections 164a and 164b are apart from the through-hole 136 in which the timer knob 140 is inserted, which are positioned between the through-holes 134 and 136 in which the timer knob 140 and the power control knob 150 are inserted.
  • the mounting projections 164a and 164b generally have cylindrical shape, in which cutoff portions are respectively formed opposite to each other.
  • a shaft 166 is integrally formed on the back surface 132 of the control panel 130, on which a stopper 168 of the locking assembly 160 is mounted.
  • Two restrictors 170a and 170b are formed on an inner surface of the sidewall 138 of the control panel 130, which are respectively spaced apart from the oval through-hole 138a at equal distance.
  • the restrictors 170a and 170b extend at a desired distance from the inner surface of the sidewall 138 of the control panel 130 toward the mounting projections 164a and 164b.
  • the locking assembly 160 includes the stopper 168, which is installed to the back surface 132 of the control panel 130 to swing within a range of a predetermined angle, and an elastic leaf spring 164c which comes in contact with the stopper 168, for supporting the stopper 168 elastically.
  • the stopper 168 has one end 168a extending toward an oval through-hole 138a formed in a sidewall 138 of the control panel 130 and the other end 168b received by the wedge-shaped groove 144 on the peripheral surface 142 of the timer knob 140.
  • the stopper 168 has an aperture formed at a center thereof in which the shaft 166 on the back surface 132 of the control panel 130 is inserted to be combined with the stopper 168.
  • the one end 168a and the other end 168b of the stopper 160 are formed at an acute angle to pivot about the shaft 166 of the stopper 168 within a range of a desired angle by operation of the switch 162.
  • the stopper 168 further includes a supporting plate 168c which comes in tight contact with the stopper 168 to receive the elasticity from the elastic leaf spring 164c.
  • the supporting plate 168c has a dovetail shape in the front view, which includes a contact portion directly contacting with the elastic leaf spring 164c and a guide portion preventing the elastic leaf spring 164c from being released from the contact portion.
  • the contact portion of the supporting plate 168c is urged by means of the elastic leaf spring 164c to make the stopper 168 not to be released from the shaft 166.
  • the elastic leaf spring 164c extends between mounting projections 164a and 164b integrally formed on the back surface 132 of the control panel 130, while coming in contact with the stopper 168 elastically to provide elasticity for the stopper 168.
  • Both ends of the elastic leaf spring 164c are respectively and fixedly inserted to each cavity of the mounting projections 164a and 164b.
  • the elastic leaf spring 164c provides a sliding surface to the supporting plate 168c in order that when the stopper 168 pivots around the shaft 166 within the range of the desired angle, the stopper 168 can pivot while the supporting plate 168c of the stopper 168 makes a point contact with the elastic leaf spring 164c.
  • the elasticity of the elastic leaf spring 164c is the largest when the peak of the contact portion of the supporting plate 168c comes in a point contact with the elastic leaf spring 164c, so that the elastic leaf spring 164c can urge the stopper 168 to the shaft 166 strongly.
  • the microwave oven 100 further comprises a switch 162 receiving the one end 168a of the stopper 168 to make the stopper 168 to rotate about the axis of the stopper 168 within the range of the predetermined angle.
  • the switch 162 has flange portions 162a and 162b which extend in parallel from a surface thereof to receive the one end 168a of the stopper 168 and a handling portion 162c which is projected from the other surface thereof to operate the switch 162.
  • the switch 162 is disposed between the restrictors 170a and 170b on the inner surface of the sidewall 138 while the handling portion 162c is inserted into the through-hole 138a of the sidewall 138 of the control panel 130.
  • the switch 162 comes in sliding contact with the inner surface of the sidewall 138 of the control panel 130 by means of the one end 168a of the stopper 168 received between the flange portions 162a and 162b as the elastic leaf spring 164c urges the stopper 168.
  • the flange portions 162a and 162b which receive the one end 168a of the stopper 168 between them, rotate the one end 168a of the stopper 168 in a clockwise or counterclockwise direction within the range of the desired angle as a user pushes up or down the handling portion 162c of the switch 162.
  • the movement of the switch 162 is restricted by means of the restrictors 170a and 170b which are arranged about the oval through-hole 138a on the inner surface of the sidewall 138 of the control panel 130.
  • the timer knob 140 has a wedge-shaped groove 144 formed on the periphery 142 thereof, which is positioned so that the groove 144 can receive the other end 168b of the stopper 168 at the initial position.
  • the switch 162 rotates the stopper 168 clockwise so that the other end 168b of the stopper 168 enters the wedge-shaped groove 144 of the timer knob 140 to prevent the timer knob 140 from rotating, as shown in FIG. 4.
  • the switch 162 rotates the stopper 168 counterclockwise so that the other end 168b of the stopper 168 leaves the wedge-shaped groove 144 of the timer knob 140 to allow the timer knob 140 to rotate, as shown in FIGS. 5 and 6.
  • FIG. 4 is an enlarged front view of the locking assembly 160 of the microwave oven 100 according to the present invention, in which the one end 168a of the stopper 168 of the locking assembly 160 is received in the wedge-shaped groove 144 on the periphery 142 of the timer knob 140
  • FIG. 5 is an enlarged front view of the locking assembly 160 of the microwave oven 100 according to the present invention, in which the one end 168a of a stopper 168 of the locking assembly 160 is released from the wedge-shaped groove 144 on a periphery 142 of a timer knob 140
  • FIG. 6 is an enlarged front view of the locking assembly 160 of the microwave oven 100 according to the present invention, in which the one end 168a of the stopper 168 of the locking assembly 160 is moved along the periphery 142 of the timer knob 140.
  • the switch 162 is disposed on the inner surface of the sidewall 138 of the control panel 130 to slide along the inner surface of the sidewall 138 so that the handling portion 162c of the switch 162 is movably inserted into the through-hole 138a formed in the sidewall 138 of the control panel 130.
  • the one end 168a of the stopper 160 is inserted between the flange portions 162a and 162b of the switch 162, so as to be rotated within the range of the desired angle by means of the switch 162. Meanwhile, the other end 168b of the stopper 168 is removably received by the wedge-shaped groove 144 on the periphery 142 of the timer knob 140.
  • the elastic leaf spring 164c urges the stopper 168 not to be released from the switch 162 while operating the switch 162. Furthermore, since the elastic leaf spring 164c provides the stopper 138 with the strong elasticity, it prevents the stopper 168 from easily rotating even if the child pushes down the switch 162 to release the stopper 168 from the wedge-shaped groove 144. Thereby, the stopper 168 cannot be released from the timer knob 140.
  • the locking assembly 160 can lock the timer knob 140. As the result, it is possible to prevent the child from operating the microwave oven 100 by rotating the timer knob 140 for amusement.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
EP03011246A 2003-02-28 2003-05-16 Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz Expired - Lifetime EP1453361B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003012907 2003-02-28
KR10-2003-0012907A KR100534541B1 (ko) 2003-02-28 2003-02-28 전자렌지의 어린이 보호용 잠금장치

Publications (2)

Publication Number Publication Date
EP1453361A1 true EP1453361A1 (de) 2004-09-01
EP1453361B1 EP1453361B1 (de) 2005-12-28

Family

ID=36593333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011246A Expired - Lifetime EP1453361B1 (de) 2003-02-28 2003-05-16 Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz

Country Status (4)

Country Link
EP (1) EP1453361B1 (de)
KR (1) KR100534541B1 (de)
DE (1) DE60303001T2 (de)
ES (1) ES2254821T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4395460A4 (de) * 2022-04-01 2025-06-25 Samsung Electronics Co., Ltd. Kochgerät

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100593060B1 (ko) * 2004-05-12 2006-06-26 주식회사 대우일렉트로닉스 전자 레인지 도어의 안전 개폐 구조
KR100751782B1 (ko) * 2006-02-21 2007-08-24 주식회사 대우일렉트로닉스 전자레인지용 스위치 안전장치
EP2247160B1 (de) * 2009-05-02 2012-11-28 Electrolux Home Products Corporation N.V. Mikrowellen-Versiegelungsvorrichtung für die Öffnung einer rotierenden Welle
CN116753544A (zh) * 2023-05-31 2023-09-15 广东美的厨房电器制造有限公司 烹饪器具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504144A (en) * 1967-07-07 1970-03-31 Philips Corp Arrangement in safety switches for microwave stoves
US4006121A (en) * 1973-06-27 1977-02-01 Matsushita Electric Industrial Co., Ltd. Door latch mechanism controlling switch in microwave oven or the like
US4755647A (en) * 1985-04-27 1988-07-05 Imanishi Kinzoku Kogyo Kabushiki Kaisha Control unit for power-supply circuit in electronic range
US5300745A (en) * 1991-01-25 1994-04-05 Moulinex (Societe Anonyme) Apparatus for placing a microwave oven in a standby condition
EP0756440A1 (de) * 1995-07-26 1997-01-29 Daewoo Electronics Co., Ltd Vorrichtung zum Steuern der Leistung eines Mikrowellenofens
EP1056313A2 (de) * 1999-05-27 2000-11-29 Samsung Electronics Co., Ltd. Mikrowellenofen mit Sicherheitsverriegelung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504144A (en) * 1967-07-07 1970-03-31 Philips Corp Arrangement in safety switches for microwave stoves
US4006121A (en) * 1973-06-27 1977-02-01 Matsushita Electric Industrial Co., Ltd. Door latch mechanism controlling switch in microwave oven or the like
US4755647A (en) * 1985-04-27 1988-07-05 Imanishi Kinzoku Kogyo Kabushiki Kaisha Control unit for power-supply circuit in electronic range
US5300745A (en) * 1991-01-25 1994-04-05 Moulinex (Societe Anonyme) Apparatus for placing a microwave oven in a standby condition
EP0756440A1 (de) * 1995-07-26 1997-01-29 Daewoo Electronics Co., Ltd Vorrichtung zum Steuern der Leistung eines Mikrowellenofens
EP1056313A2 (de) * 1999-05-27 2000-11-29 Samsung Electronics Co., Ltd. Mikrowellenofen mit Sicherheitsverriegelung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4395460A4 (de) * 2022-04-01 2025-06-25 Samsung Electronics Co., Ltd. Kochgerät

Also Published As

Publication number Publication date
DE60303001T2 (de) 2006-07-13
DE60303001D1 (de) 2006-02-02
KR100534541B1 (ko) 2005-12-08
ES2254821T3 (es) 2006-06-16
KR20040077380A (ko) 2004-09-04
EP1453361B1 (de) 2005-12-28

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