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
  • H05B6/6435—Aspects relating to the user interface of the microwave heating apparatus
• • 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
• • 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
  • H05B6/6408—Supports or covers specially adapted for use in microwave heating apparatus
  • H05B6/6411—Supports or covers specially adapted for use in microwave heating apparatus the supports being rotated
• • 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
  • H05B6/66—Circuits
  • H05B6/666—Safety circuits

Definitions

• the present invention is applied to a cooking device such as an electric oven and a microwave oven.
• the present invention relates to a structure of an operation plate which is an input part of an electronic control device including an LSI such as a micro computer (hereinafter abbreviated as a microcomputer) for controlling a heating source. .
• an LSI such as a micro computer (hereinafter abbreviated as a microcomputer) for controlling a heating source.
• this type of cooking device is self-triggered due to extraneous noise, lightning surge, 10 O static electricity noise, etc., and the cooking device automatically switches to the use state against the intention of the user.
• the most dangerous situation is when an abnormal heating operation occurs in which the heating operation is started erroneously even though the command to start the heating is input to the control system. Under these conditions, the temperature of the airframe and doors rises abnormally and there is a danger of burns if a good user comes into contact with them. It is also expected that the aircraft itself will ignite and burn to combustible materials such as curtains around it, causing a fire.
• heating cookers incorporating microcomputers have become popular due to the remarkable progress of electronic control circuit technology using microcomputers.
• These microcomputers are extremely resistant to static-electricity surge currents.
• the front face of the main body 1 A decorative panel 3 displaying cooking functions and cooking menus on an operation panel 2 provided in the kitchen, cooking keys 4 and 5, the cooking key switches 6 , T, and an insulation switch.
• the decorative plate 3, the cooking keys 4 and 5, the preparation key switch 6 and the insulation spacer S are provided.
• the board A 9 constituted the keyboard 1 O.
• the back plate 1 1 made of metal is provided in contact with the substrate A 9, the back plate 1 1 has been electrically connected to the chassis 1 2. Furthermore, the cooking keys 4 and 5 are provided with a microcomputer 13 operated by a signal from any of the input keys, and a board B 15 on which electronic components 14 are disposed. static electricity charged in the human body pack veneer 3 or et reinforcement when operating the vessel. Tsutawa the click plate 1 1] cooking ?, keyboard 1 in O the pack plate 1 1 and the role of the antenna scan i Tsu is flow in Ji 6, 7, etc., the substrate B 1 Ma provided on the 5 Lee co down 1 3 and the electronic component 1 4 and the like to the erroneous signals intends is to want sent.
• the Ma by erroneous signal y co down 1 3 and the electronic component 1 4 and the like are Yabu ⁇ ] ?, The body 1 each unit is heated abnormally pressurized]? To be very dangerous. For this reason, electronic circuits using microcomputers 13 have been carefully designed and safety has been carefully considered in microcomputer software.
• the microcomputer 13 When electricity is discharged to the operation knobs and operation surface of the main unit 1 and the circuit components inside the operation panel 2, the microcomputer 13 malfunctions or is destroyed, and the display tube is installed in the device equipped with the display tube. In some cases, it may be erroneously displayed, and in addition, the device itself may oscillate automatically as described above.
• the present invention uses an LSI such as a microcomputer for controlling a heating source of a heating device as an input unit of an electronic control device and conducts the conduction to a part of a keyboard mounted on an operation panel on the front panel. By attaching a thin metal sheet in close contact with it and grounding this metal sheet to the chassis of the main body]. O 'to provide a cooking device that prevents malfunctions.
• Figure 1 is an external perspective view of a cooking device according to an embodiment of the present invention
• Figure 2 is a side sectional view of the cooker
• Fig. 3 is a first view of the Y - main part new surface view definitive line
• Fig. 4 is a circuit diagram showing a control circuit of the cooking device
• Fig. 5 and Fig. 5 are cutaway views of a main part of a cooking device according to another embodiment of the present invention
• Fig. FIG. 3 is a cross-sectional view of a main part of an operation panel of the cooking device. '
• a door 19 is provided at the front opening of the main body 1 so as to be freely opened and closed.
• a heating chamber 20 is provided inside the main body 1 .
• the front surface of the main body 1 operation on the side of the door 1 9 Pas, channel 2 is provided, the operation panel 2 is a non-conductive material Example
• R For example, it is made of plastic and its periphery is covered with an operation panel frame 21. As shown in FIG. 3, a keyboard 1 O is provided on the back side of the operation panel 2 and on the entire surface of the bat part 22. This keyboard 1 O is made of conductive material such as carbon paste.
• the cooking keys 4, 5 and the cooking start key 23, which are a plurality of input keys, are provided.
• Decorative plate 3 that touches the finger to be operated and aluminum foil and stainless steel bonded between this decorative plate 3 and insulation sheet 16; conductive metal sheet such as foil, preferably with high tensile strength a sheet 1 ⁇ , wherein a plurality of input keys which are bonded Ze' sheet 1 6 and the Ze' sheet ⁇ ⁇ 1 6. in the input key, the scan provided opposite, for example, regulating physical keys 4, 5
• the keyboard 10 is composed of a synthetic resin substrate A 9 on which the switches 6 and T are provided, an insulating sheet 16 and an insulating spacer S for separating the substrate A 9. The one piece extending from one end of the sheet metal sheet
• the conductive portion 18 for metal is bent and provided with the substrate A 9, and a metal member provided behind the substrate A 9 in contact with the substrate A 9 and grounded to the chassis 12 of the main body 1. Electrically connect to the step 2 4 of the back plate 1 1
• the U width is set to be larger than that in FIG. It is necessary that the position of sheet 1 be closer to the operation surface than cooking keys 4 and 5.
• the step 24 may be provided on the back plate 11 , and the plate may be directly held by the back plate 11 .
• this sheet 17 is different from the above-mentioned embodiment. Alternatively, it may be bonded between the insulation sheet 16 and the cooking keys-4 and 5.
• Reference numeral 25 designates a lead-out unit which collectively derives the wiring provided on the switches 6 and keys of the cooking keys 4 and 5, and a lead-out board B 15 from the lead-out unit 25 using a lead ⁇ 26 or the like. It is connected to a microcomputer 13 and an electronic component 14 which are electronic control devices provided in the computer.
• the good urchin configured cooker is closed Doasui Tsu Chi 2 7, 2 8 shown in FIG. 4 when the door is closed 1 9 accommodating the ⁇ thermophysical the heating chamber 2 0 in the main body 1, Press the cooking key 4 or 5 provided on the keyboard 1 O and press the cooking start key 2 3 to press the microcomputer 1 3 ⁇ OMPI Is activated, the contact 3 O of the relay 29 is closed, and the high frequency generator 31 oscillates the high frequency ′.
• the operation panel frame 1 is made of a non-conductive material. By transmitting 1, an erroneous signal is not given to the microcomputer 13, the electronic component 14, and the like disposed on the board B 15.
• the pack plate 11 grounded to the chassis 12 of the main unit 1 and a metal thin plate such as aluminum foil or stainless foil constituting the keyboard 1 O Since the conductive part 18 of the sheet 1 is electrically in contact with the conductive part 18 of the sheet 1, there is an error in the microcomputer 13 and the electronic parts 14 provided on the board B 15. It is safe to give a signal o
• the grounding conductive part 1S extending from the sheet 17 is made of aluminum foil or stainless steel foil (a metal sheet), it differs from conductive rubber, etc.] j Keyboard ⁇ ! O
• the thickness of the entire sheet can be reduced, and the sheet 1 complete sheet 1 6 Which keyboard 1 O can make each sheet into a mouth shape, making it rubber-like in printing and bonding work. It has a great effect of higher mass productivity.
• the operation panel can be made thinner and more compact.
• the static electricity charged to the human body varies depending on the weather conditions, grounding conditions of the human body, and the type of clothing, but is approximately 1 o to 1 S KV.
• a high voltage was confirmed, and if it was an aluminum vapor deposition sheet, it would be erased and played a role.
• a thin metal sheet such as an aluminum foil or stainless steel foil was used. Since the sheet is manufactured, the objective can be sufficiently achieved even with such a high voltage. In the case where I]?
• veneer 3 in which is more excellent in 3 ⁇ 4 throat safety that can prevent a low-voltage electric shock because there is a sheet over sheet 1 7 even when damaged in any way o
• a conductive and thin metal sheet is provided on the keyboard portion of the operation panel that is touched by a human body during operation. Since the configuration is such that the unit and a part of the main unit are accessible to the chassis, etc., it is possible to prevent malfunction of the electronic control device including microcomputers from static electricity and surge current charged on the human body and enhance safety. You can.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Human Computer Interaction (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Push-Button Switches (AREA)
• Elimination Of Static Electricity (AREA)
• Details Of Measuring And Other Instruments (AREA)
• Electric Ovens (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=12302907

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (7)

• 1981
  • 1981-03-02 JP JP3040181A patent/JPS57144826A/ja active Granted
• 1982
  • 1982-02-10 WO PCT/JP1982/000038 patent/WO1982003113A1/ja active IP Right Grant
  • 1982-02-10 EP EP19820900561 patent/EP0073250B1/en not_active Expired
  • 1982-02-10 AU AU81426/82A patent/AU547740B2/en not_active Ceased
  • 1982-02-10 DE DE8282900561T patent/DE3274757D1/de not_active Expired
  • 1982-02-25 CA CA000397020A patent/CA1189168A/en not_active Expired

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events