EP1056313A2 - Mikrowellenofen mit Sicherheitsverriegelung - Google Patents

Mikrowellenofen mit Sicherheitsverriegelung Download PDF

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Publication number
EP1056313A2
EP1056313A2 EP99308610A EP99308610A EP1056313A2 EP 1056313 A2 EP1056313 A2 EP 1056313A2 EP 99308610 A EP99308610 A EP 99308610A EP 99308610 A EP99308610 A EP 99308610A EP 1056313 A2 EP1056313 A2 EP 1056313A2
Authority
EP
European Patent Office
Prior art keywords
circuit board
microwave oven
door
switches
printed circuit
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Withdrawn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
EP99308610A
Other languages
English (en)
French (fr)
Other versions
EP1056313A3 (de
Inventor
Sang-Jun Park
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1056313A2 publication Critical patent/EP1056313A2/de
Publication of EP1056313A3 publication Critical patent/EP1056313A3/de
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the present invention relates to a microwave oven including a door position sensitive safety interlock assembly comprising a plurality of switches responsive to the position of a cooking chamber door.
  • Figure 1 shows a conventional microwave oven.
  • the conventional microwave oven includes a cooking chamber 12 and an electrical component chamber 14 within a cabinet 11.
  • a turntable 16, on which food is placed for cooking, is located at the bottom of the cooking chamber 12.
  • the turntable 16 is driven by a driving motor (not shown), which is installed under the cooking chamber 12.
  • a magnetron 17 and electrical components for driving the magnetron 17 are located in the device chamber 14.
  • the microwaves generated by the magnetron 17 are guided to the cooking chamber 12 by a waveguide (not shown).
  • a door 20 is mounted at the front of the cooking chamber 12 and a control panel 30 is formed at the front of the electrical component chamber 14.
  • a safety device is provided to prevent operation of the magnetron 17 oven with the cooking chamber door 20 open.
  • such a safety device comprises a door latch 42 mounted on the cabinet 11, a plurality of sensitive switches, e.g. microswitches, 45, 46, 47 mounted on the door latch 42, and a bolt element 48 mounted in the door 20 which actuates the sensitive switches 45, 46, 47 in dependence on whether the door 20 is open or closed.
  • sensitive switches e.g. microswitches, 45, 46, 47 mounted on the door latch 42
  • bolt element 48 mounted in the door 20 which actuates the sensitive switches 45, 46, 47 in dependence on whether the door 20 is open or closed.
  • the bolt element 48 includes a bar 49 movably disposed within the door 20, and a pair of arms 50a, 50b extended from the bar 49 through the back wall of the door 20.
  • the bar 49 is downwardly biased by a spring 51 which is disposed below the bar 49.
  • the door latch 42 includes a pair of holes 43a, 43b though which the arms 50a, 50b can be inserted, and a pair of locking portions 44a, 44b for preventing unintended removal of the arms 50a, 50b from the latch 42.
  • the plurality of sensitive switches 45, 46, 47 include first and second sensitive switches 45, 46 and a monitor switch 47 mounted at appropriate places in the door latch 42.
  • a switch lever 52 is disposed between the second sensitive switch 46 and the monitor switch 47.
  • a door lever 53 is provided at the bottom of the door latch 42.
  • the sensitive switches 45, 46, 47 are connected to a main circuit board 32, mounted to the back of the control panel 30 of the microwave oven by a connecting connector 54.
  • the main circuit board 32 has various electric components for controlling the operation of the microwave oven.
  • the first and second arms 50a, 50b are inserted through the insertion holes 43a, 43b of the door latch 42 and move along the upper faces of the locking portions 44a, 44b which slope upwards extended from behind the insertion holes 43, 43b.
  • the first arm 50a is locked by the first locking portion 44a and presses the button of the first sensitive switch 45.
  • the second arm 50b is locked by the second locking portion 44b and presses the button of the monitor switch 47. Simultaneously, the second arm 50b presses on the switch lever 53, pivoting it so that it presses the button of the second sensitive switch 46.
  • the conventional microwave oven employs separate leads 54 for connecting the sensitive switches 45, 46,47 to the main circuit board 32. Consequently, the wiring structure between the sensitive switches 45, 46,47 and the main circuit board 32 is complex and many steps, such as tying the leads 54 in a bundle, must be taken to prevent any interference with other components.
  • a microwave oven according to the present invention is characterised in that the switches are mounted to a printed circuit board and electrically connected to conductive tracks on the printed circuit board.
  • the printed circuit board includes a multiway terminal block whose terminals are connected to said switches. More preferably, the printed circuit board includes a further multiway terminal block whose terminals are connected to said switches.
  • the switches are connected to a control panel circuit board by a ribbon cable between said circuit boards.
  • the safety device for the microwave oven includes a door latch 110 disposed within the cabinet 102 of a microwave oven, a printed circuit board 130 fixed to the door latch 110 and a plurality of sensitive switches 131, 132, 133 mounted on the printed circuit board 130 so as to be actuated by a bolt member 120.
  • the bolt member 120 includes a vertical bar 121 in the door 101 and a pair of arms 122a, 122b extending from the stick 121 out of the back of the door 101.
  • the bar 121 is downwardly biased by a spring 123, which is located below the bar 121.
  • the door latch 110 includes a pair of insertion holes 112a, 112b, through which the arms 122a, 122b of the bolt member 120 can be inserted, and a pair of locking portions 114a, 114b for preventing unintended removal of the arms 122a, 122b from the insertion holes 112a, 112b.
  • the printed circuit board 130 is fixed to the rear of the locking portions 114a, 114b and the sensitive switches 131, 132, 133 are mounted at appropriate places on the printed circuit board 130.
  • the first sensitive switch 131 is disposed to the rear of the first locking portion 114a
  • the monitor switch 133 is disposed to the rear side of the second locking portion 114b
  • the second sensitive switch 132 is disposed under the monitor switch 133.
  • An actuating member 117 is disposed between the monitor switch 133 and the second sensitive switch 132 for upwardly moving the second arm 122b to release the door 101.
  • the actuating member 117 is pressed downwards by the second arm 122b and presses the button of the second sensitive switch 132.
  • the actuating member 117 is integrally formed with a door release lever 116.
  • the first and second sensitive switches 131, 132 and the monitor switch 133 are connected with conductive tracks, formed on the printed circuit board 130, by connectors 134 mounted to the printed circuit board 130.
  • a main circuit board 104 is mounted at the back of the control panel 103 of the microwave oven and has various electric components of control part mounted thereon for controlling the operation of the microwave oven.
  • the main circuit board 104 and the printed circuit board 130 are electrically connected to each other by ribbon cables 136a, 136b.
  • One ribbon cable 136a comprises a plurality of input lines and the other 136b comprises a plurality of output lines. It is not necessary to separate the input and output ribbon cables 136a, 136b from each other, since the wiring layout of the main circuit board 104 and the printed circuit board 130 can be modified in various ways.
  • the first and second arms 122a, 122b are inserted through the insertion holes 112a, 112b of the door latch 110 and then move along the upper faces of the locking portions 114a, 114b.
  • the first and second arms 122a, 122b are held by the locking portions 114a and 114b.
  • the first arm 122a is held by the first locking portion 112a and presses the button of the first sensitive switch 131 and the second arm 122b is held by the second locking portion 112b and presses the button of the monitor switch 133. Simultaneously, the actuating member 117 of the door lever 116 is pivoted downwardly by the second arm 122b, pressing the button of the second sensitive switch 132.
  • first and second arms 122a, 122b are inserted through the insertion holes 112a, 112b of the door latch 110, they press the buttons of the sensitive switches 131, 132, 133 and operation of the magnetron is enabled. Consequently, a user can cook food in the microwave oven in accordance with the instructions he inputs using the control panel 103.
  • the magnetron can not be operated.
  • the actuating member 117 of the door lever 116 When the user presses the door lever 116, the actuating member 117 of the door lever 116 is pivoted upwardly and the button of the second sensitive switch 132 is released.
  • the actuating member 117 of the door lever 116 presses the second arm 122b upwards when the operational portion 117 is pivoted upwardly, so that the arms 122a, 122b are released from the locking portions 114a, 114b and the door 101 can be opened.
  • the printed circuit board 130 may be fixed directly to the cabinet 102, and the insertion holes 112a, 112b and the locking portions 114a, 114b of the door latch 110 may be directly formed in the cabinet 102. In the latter case, since there is no need for the door latch 110, the number of parts may be reduced.
  • wiring between the plurality of sensitive switches and the main circuit board is electrically connected by the parallel connector.
  • the wiring structure between the sensitive switches and the main circuit board becomes very simple, and the wiring process can be completed by simply connecting the parallel connectors. As a result, the number of processes is reduced, increasing the assembly efficiency.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP99308610A 1999-05-27 1999-10-29 Mikrowellenofen mit Sicherheitsverriegelung Withdrawn EP1056313A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9919132 1999-05-27
KR1019990019132A KR20000074891A (ko) 1999-05-27 1999-05-27 전자렌지의 안전장치

Publications (2)

Publication Number Publication Date
EP1056313A2 true EP1056313A2 (de) 2000-11-29
EP1056313A3 EP1056313A3 (de) 2002-02-06

Family

ID=19588001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99308610A Withdrawn EP1056313A3 (de) 1999-05-27 1999-10-29 Mikrowellenofen mit Sicherheitsverriegelung

Country Status (5)

Country Link
EP (1) EP1056313A3 (de)
JP (1) JP2000337640A (de)
KR (1) KR20000074891A (de)
AU (1) AU5827899A (de)
CA (1) CA2288945A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1453361A1 (de) * 2003-02-28 2004-09-01 Daewoo Electronics Corporation Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz
CN100465518C (zh) * 2003-02-21 2009-03-04 乐金电子(天津)电器有限公司 微波炉的门插销板结构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104373976B (zh) * 2013-08-12 2017-05-03 广东美的厨房电器制造有限公司 家用器具
EP3648608B1 (de) 2017-07-06 2023-08-02 Breville Pty Limited Einziehbare tür für einen ofen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2661069B2 (ja) * 1987-10-30 1997-10-08 松下電器産業株式会社 高周波加熱装置
KR0135724B1 (ko) * 1994-02-25 1998-04-23 김광호 고주파가열장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465518C (zh) * 2003-02-21 2009-03-04 乐金电子(天津)电器有限公司 微波炉的门插销板结构
EP1453361A1 (de) * 2003-02-28 2004-09-01 Daewoo Electronics Corporation Mikrowellenofen versehen mit Verriegelungseinrichtung für Kinderschutz

Also Published As

Publication number Publication date
KR20000074891A (ko) 2000-12-15
CA2288945A1 (en) 2000-11-27
EP1056313A3 (de) 2002-02-06
AU5827899A (en) 2000-11-30
JP2000337640A (ja) 2000-12-08

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