JP3932650B2 - microwave - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microwave oven for cooking food, and more particularly, to a radio wave seal structure when a food placing portion of the heating chamber has a drawer configuration.
[0002]
[Prior art]
Conventionally, a microwave oven in which the food placing portion of the heating chamber has a drawer structure is disclosed in Japanese Patent Laid-Open Nos. 3-45820 and 6-109257. According to Japanese Patent Laid-Open No. 3-45820, a microwave oven is put in and out by sliding a drawer composed of a bottom plate 3 on which food is placed and an opening / closing door 4 in a heating chamber 2 provided in the apparatus body 1 as shown in FIG. It was the composition which did. Japanese Patent Application Laid-Open No. 6-109257 discloses a structure that prevents the drawer from being inclined when the drawer is pulled out.
[0003]
[Problems to be solved by the invention]
However, the microwave oven described in each of the above publications has a drawer structure for facilitating the taking in and out of the food, and in using the microwave oven, the drawer including the bottom plate on which the food is placed and the open / close door is slid There is no disclosure of the problem of radio wave leakage that occurs because of this.
[0004]
When it is configured to pull out the food placement part of the heating chamber of the microwave oven, the open / close door configured integrally with the bottom plate on which food is placed as in the conventional example is moved in the front-rear direction, which is the drawer direction, When the opening is configured to open and close, since the movement of the opening and closing door is linked to the movement of the bottom plate, a non-uniform gap is apt to be generated between the opening and the opening and closing door.
[0005]
When the gap becomes large, there arises a problem that radio wave leakage from the gap increases. For such a device, the radio wave leakage value is regulated by a standard (Electrical Appliance and Material Control Law), and it is necessary to practically fall below the standard value (1 mW / cm ² ).
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention comprises a main body casing, a microwave generator provided on the main body casing, and a heating container having a drawer structure on which food is placed, and the heating container and the opening of the heating container A heating chamber is formed with the lid portion of the microwave generator including the power feeding port that covers the electric wave, and leakage of radio waves is prevented between the opening peripheral portion of the heating container and the lid portion facing the opening peripheral portion. It was set as the structure which provides the electromagnetic wave sealing mechanism to prevent.
[0007]
The gap between the upper opening peripheral edge of the heating container and the lid directly affects the leakage of radio waves, but since this gap is drawn out in parallel with the movement in the pull-out direction, that is, in the movable direction, it basically does not change. Even if the container is slightly moved back and forth in the pulling direction, radio wave leakage can be stably suppressed to a low level. Therefore, practically, it can be made sufficiently below the standard value (1 mW / cm ² ).
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention forms a heating chamber for heating food with a heating container having a drawer structure on which food is placed and a lid of a microwave generator including a power supply opening covering the opening of the heating container, and opening the heating container A radio wave sealing mechanism for preventing radio wave leakage is provided between the peripheral edge portion and the lid portion facing the peripheral edge portion.
[0009]
And since it was set as the structure which provided the electromagnetic wave sealing mechanism between the upper opening and cover part of the heating container, the electromagnetic wave leakage from this part can be suppressed.
[0010]
Further, a choke-type radio wave sealing mechanism including a choke groove is provided between the opening peripheral edge of the heating container and the lid facing the opening peripheral edge.
[0011]
And the opening peripheral part of a heating container and a cover part do not adhere, but even if there is a gap of about 1 mm, for example, the radio wave leakage can be suppressed to a sufficiently low value by a choke action, so that the heating container can be pulled out lightly without friction resistance It can be.
[0012]
In addition, a choke-type radio wave sealing mechanism is configured by the choke groove provided on the periphery of the lid and the flange provided on the opening periphery of the heating container so as to face the choke groove.
[0013]
And since the collar part was only provided in the heating container, a heating container can be comprised simply and lightweight, and the good handling can be maintained enough also with respect to washing with water.
[0014]
Further, in the choke groove forming the radio wave sealing mechanism and the collar portion opposed to the choke groove, the width of the collar portion before and after the heating container is pulled out is wider than the width of the left and right collar portions.
[0015]
Since the corresponding distance between the choke groove and the flange portion of the heating container becomes long, even when a deviation occurs in the drawing direction, the deviation until the radio wave leaks can be increased.
[0016]
In addition, at least one switch means having a function of detecting the stored state of the heating container in the main body casing and stopping the operation of the microwave generator is provided on the lower surface side of the main body casing lid.
[0017]
Further, the switch means has a configuration having an operating portion that operates in the vertical direction.
[0018]
And the said switch means can detect this when a gap more than a fixed value arises between the cover part lower surface of a main body housing, and the collar part of a heating container, and can stop a microwave generator. In a state where the heating container is pulled out, there is a possibility that it is operated from the entrance / exit of the heating container of the main body casing. However, since the switch means is provided on the lower surface of the lid portion and further comprises an operating portion that operates in the vertical direction, it cannot be easily operated from the outside using a rod or screwdriver. The stop of the wave generator is not released.
[0019]
Further, a radio wave sealing mechanism is formed by a choke groove provided on the periphery of the lid portion and a flange portion provided on the opening periphery of the heating container so as to face the choke groove, and the switch means is opened and closed by the flange portion. .
[0020]
Since the switching means is opened and closed by the collar itself forming the radio wave sealing mechanism, the gap between the collar and the choke groove that is opened and closed by the switching means can be set and managed more accurately.
[0021]
Further, the switch means is also provided with a function of detecting whether the heating container is pulled out, that is, whether the heating container is deviated from the position where it is normally stored in the main body casing.
[0022]
Further, no separate detection means for detecting the drawing state of the heating container is required. In addition, it is possible to prevent a danger that the detection means for the pulled-out state is operated from the outside using a rod, a screwdriver or the like.
[0023]
Further, a heating source for heating the bottom wall surface of the heating container is provided on the main body housing side mechanically independent from the heating container below the bottom surface of the heating container.
[0024]
And the heating source is provided on the main body housing side, the heating container is completely independent and separated from the heat source, and since it can be a simple configuration without cables etc., the heating container can be used like a frying pan, It can be washed as it is.
[0025]
The heating source is configured to use radiant heating means such as a halogen lamp or an infrared heater.
[0026]
The heating source is provided on the main body casing side separately from the heating container, and the heating container is provided so as to be freely drawn out from the main body casing. For this reason, it is unavoidable that a certain amount of gap is generated between the bottom surface of the heating container and the heating source, but since the heating source is a radiant heating means, the bottom surface of the heating container can be efficiently heated even if there is a gap.
[0027]
Further, the bottom surface of the heating container was made of a punching metal or a wire mesh.
[0028]
And a foodstuff can be directly heated with a heating source from between the through-holes of a punching metal or a metal-mesh. On the other hand, since the heating container is provided so that it can be pulled out, the upper part of the heating source is released when the heating container is pulled out, so it is easy to clean even if food scraps fall between the punching metal or the wire mesh. Can do.
[0029]
The heating source was an induction heating means.
[0030]
Even if there is a gap between the bottom surface of the heating container and the heating coil of the induction heating means, the bottom surface of the heating container can be efficiently heated, and the top surface of the heating coil is mechanically covered with a cover made of a dielectric material such as a ceramic plate. Therefore, a safe and clean configuration can be realized.
[0031]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. The microwave leakage referred to in the present invention refers to a value (1 mW / cm ² ) that is equal to or greater than a standard value (Electrical Appliance and Material Control Law).
[0032]
Example 1
FIG. 1 is a cross-sectional view of a main part of a microwave oven according to Embodiment 1 of the present invention.
[0033]
In FIG. 1, 5 is a main body housing of the microwave oven. Reference numeral 6 denotes a microwave generator, which includes a magnetron 7 that generates microwaves, a waveguide 8 that propagates microwaves, a lid 11 having a feeding port 9 and a choke groove 10 as a radio wave sealing mechanism. . Reference numeral 12 denotes a heating container having a collar portion 14 on which the food 13 is placed. The heating container 12 has a drawer structure that can be taken in and out of the main body housing 5. And while forming the heating chamber 15 with the heating container 12 and the cover part 11 of the microwave generator 6 which covers opening of this heating container 12, the collar part 14 of the heating container 12, and the choke groove 10 of the cover part 11, By making this correspond, it was set as the structure which prevents that a microwave leaks from the heating chamber 15. FIG.
[0034]
With this configuration, the microwave generated in the magnetron 7 propagates through the waveguide 8 and is supplied to the heating chamber 15 from the power supply port 9 to heat the food 13 placed in the heating container 12 of the heating chamber 15.
[0035]
Next, microwave leakage will be described.
[0036]
Since the drawing direction, which is the moving direction of the heating container 12, is perpendicular to the forming direction of the gap between the heating container 12 and the lid 11 covering the heating container 12, the heating container 12 moves slightly in the drawing direction. In addition, the gap G between the opening of the heating container 12 and the lid 11 is basically unchanged. Therefore, if the gap G between the opening of the heating container 12 and the lid portion 11 is sufficiently small so that microwaves do not leak during assembly, the gap G changes even if the heating container 12 moves slightly in the movable direction. Therefore, it is possible to prevent radio wave leakage.
[0037]
Further, the choke type radio wave sealing mechanism including the collar portion 14 of the heating container 12 and the choke groove 10 provided in the lid portion 11 prevents radio wave leakage due to choke action even if there is a gap of about 1 to 2 mm, for example. can do. Therefore, the heating container 12 is configured to be pulled out lightly without frictional resistance by providing a slight gap.
[0038]
In addition, in the case of the present embodiment, since only the collar portion 14 is added to the heating container 12, the heating container 12 is very simple and lightweight, so that it can be sufficiently handled even for washing with water.
[0039]
On the other hand, it is of course possible to provide a configuration in which the choke groove is provided on the opening periphery of the heating container 12 and the collar portion is provided on the periphery of the lid, but in this case, the simplicity of the heating container 12 is slightly impaired.
[0040]
(Example 2)
FIG. 2 is a cross-sectional view of a main part of a microwave oven according to Embodiment 2 of the present invention.
[0041]
In this embodiment, the difference from the first embodiment is that the heating container 12 is detected when it begins to be pulled out of the housed state, and this detects the pull-out detection means 16 for stopping the operation of the magnetron 7 which is a microwave generator. It is a point provided in part.
[0042]
In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0043]
Next, the operation and action will be described. When the heating container 12 is pulled out from the housed state more than a certain amount, the drawer detecting means 16 for detecting ON / OFF at the position of the side wall of the heating container 12 is activated, and the operation of the magnetron 7 is forced. Stop. At this time, the heating container 12 moves a certain distance in the pulling direction until the pulling detection means 16 detects it, but the gap G between the opening of the heating container 12 and the lid portion 11 basically does not change. The radio wave leakage can be suppressed until just before the oscillation stops.
[0044]
(Example 3)
FIG. 3 shows a cross section of the lid portion 11 and the heating container 12 of the microwave oven according to the third embodiment of the present invention. FIG. 3 (a) is a cross section parallel to the drawing direction of the heating container 12, and FIG. It is a cross section perpendicular to the drawing direction of the heating container 12. In the present embodiment, the difference from the first embodiment is that the width Wa of the flange before and after the heating container 12 in the pull-out direction of the heating container 12 is made wider than the width Wb on the left and right at the flange portion 14 at the opening periphery. . The turn 14a provided on the outer peripheral portion of the collar portion 14 of this embodiment is provided for the purpose of improving the strength and flatness of the collar portion 14.
[0045]
In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0046]
Next, the operation and action will be described. The heating container 12 is restricted from both sides in the direction perpendicular to the pulling direction, and basically has a structure that does not move. Misalignment is inevitable. On the other hand, in the present embodiment, even if the w is shifted in the pulling direction, the width Wa of the pulling direction is wide, so that the radio wave formed by the choke groove 10 of the lid portion 11 and the brim portion 14 facing this. The sealing mechanism will be maintained. In particular, as in the case of the second embodiment, when the drawer detection unit 16 is configured to stop the oscillation of the magnetron 7, a sufficient radio wave sealing function can be obtained even if the drawer is moved until immediately before the drawer detection unit 16 is operated. You can be able to demonstrate.
[0047]
Example 4
FIG. 4 is a cross-sectional view of a main part of a microwave oven according to Embodiment 4 of the present invention. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description. 4a is a cross-sectional view of the main body housing 5 and the lid 11 constituting a part thereof, the switch means 17 having the operating portion 18 on the lower surface of the lid 11 and the heating container 12 and the collar portion 14 cut perpendicularly to the drawing direction. FIG. 4B shows a cross section of the main part cut in parallel to the drawing direction. In this embodiment, the switch means 17 is provided on the peripheral edge of the lid 11. The operating portion 18 of the switch means 17 is provided through the lid portion 11 downward from the lower surface of the lid portion 11 so as to come into contact with the flange portion 14 on the peripheral edge of the opening of the heating container 12. When the heating container 12 is pulled out, a taper portion 19 is provided at the back of the collar portion 14 to which the operating portion 18 finally comes into contact, as shown in FIG.
[0048]
Next, the operation and action will be described. In FIG. 4 b, when the heating container 12 is put into the main body housing 5, the tapered portion 19 comes into contact with the operating portion 18 of the switch means 17, and when further pressed, the operating portion 18 is gradually pushed up by the tapered portion 19. . As shown in FIG. 4a, the collar 14 of the heating container 12 determines the operating position of the operating unit 18, in other words, the opening / closing position of the switch means. If the gap G between the collar part 14 and the cover part 11 is small, it will be in a closed state and the magnetron 7 will be operable. When the gap G increases, the switch means 17 is opened, and the operation of the magnetron 7 is stopped in preference to all other control means. Here, since the opening / closing operation of the switch means 17 is performed by the collar portion 14 forming the radio wave sealing mechanism itself, the determination of the gap G is highly accurate.
[0049]
The gap G between the heating container 12 and the lid portion 11 is basically determined at the time when the main body housing 5 is assembled regardless of the drawing operation of the heating container 12. That is, in this embodiment, the main body housing upper part 5a and the main body housing lower part 5b with the lid part 11 are connected and fixed by the screw part 5c, and the gap G between the heating container 12 and the lid part 11 is heated. It is determined by the distance between the lid portion 11 into which the container 12 is inserted and the bottom portion of the main body housing lower portion 5b. In any case, the switch means 17 has an operating portion 18 on the lower surface of the lid portion 11 and the operating direction is the vertical direction, so that a rod-shaped tool is inserted from the front surface of the main body housing 5 into and out of the heating container 12. It is difficult to operate even if it is used, and it is not inadvertently activated.
[0050]
(Example 5)
FIG. 5 shows a cross section of the main part of the microwave oven according to the fifth embodiment of the present invention near the lid portion 11, the switch means 17, and the flange portion 14 of the heating container 12. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0051]
The switch means 17 is disposed outside the choke groove 10 at the periphery of the lid 11 located in the back of the heating container 12 in the pulling direction, and the collar portion 14 facing this is a taper portion 19 that faces downward toward the outside. have.
[0052]
Next, the operation and action will be described. If the heating container 12 is in a completely stored state, the switch means 17 is closed by the collar portion 14. When the heating container 12 is pulled out, the operating portion 18 of the switch means 17 is first applied to the tapered portion 19 and then comes to a position where there is no tapered portion 19. Since the taper portion 19 is inclined downward, the operating portion 18 of the switch means 17 operates downward along the inclination of the taper portion 19, and moves from the closed state to the open state while moving the taper portion 19. Transition. Conversely, when the heating container 12 is inserted, the operating portion 18 is pushed up by the taper portion 19, the switch means 17 is closed, and the operation is possible. Therefore, if the tapered portion 19 is made sufficiently short, it can be used as one of drawer detecting means for stopping the operation of the microwave generator 6 when the heating container 12 starts to be pulled out.
[0053]
(Example 6)
FIG. 6 is a cross-sectional view of an essential part of Embodiment 6 of the microwave oven of the present invention. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0054]
In the present embodiment, the difference from the first embodiment is that a heating source 20 is provided on the main body housing 5 side mechanically independent from the heating container 12 below the bottom surface of the heating container 12. The heating source 20 is a radiant heating means such as a halogen lamp or an infrared heater. Even if a sheathed heater is used, the surface temperature at the time of heating can be set to about 500 ° C. or more, so that it sufficiently functions as a radiant heating means.
[0055]
Next, the operation and action will be described. When the heating container 12 is housed in the main body housing 5, the heating source 20 is provided directly below the bottom of the heating container 12. Since the radiant heating means is used as the heating source 20, the heating container 12 and the heating source 20 can be heated efficiently and at high speed even if they are somewhat apart. In addition, since the heating container 12 is not attached to anything directly related to the heating source, the heating container 12 has a light and simple configuration and can be easily handled as a frying pan. There are no electrical parts, so it can be pulled out of the main unit and washed with water.
[0056]
(Example 7)
FIG. 7 is a cross-sectional view of an essential part of Embodiment 7 of the microwave oven of the main body. In addition, the thing of the same code | symbol as Example 6 has the same structure, and abbreviate | omits description.
[0057]
In the present embodiment, the difference from the sixth embodiment is that the bottom surface of the heating container 9 is made of a punching metal 21, and further, a scrap receiving tray 22 provided freely under the heating source 20 is provided. It is a point.
[0058]
Next, the operation and action will be described. The punching metal 21 has the same function as a metal wall with respect to the microwave, and the heating chamber 15 closes the microwave to heat the food 13, while the food 13 stored in the heating container 12 opens the punching metal 21. It is directly cooked by radiant heat or conduction heat from the heating source 20 transmitted through the section. In addition, food waste or the like that has dropped from the opening of the punching metal 21 toward the heating source 20 is received by the waste receiving tray 22. The scrap receiving tray 22 and the heating source 20 and their surroundings can be cleaned directly by putting their hands in the heating container 12 while the cleaning container 12 is pulled out. What is important here is that microwaves are present only in the heating chamber formed by the heating container 12 and the lid 11, so troubles such as leakage of microwaves and sparks due to microwaves can be avoided. The heat source 20 and the waste receiving tray 22 can be configured without taking any consideration into consideration.
[0059]
In each of the above embodiments, the bottom of the heating container 12 is punched metal, but it can also be a wire mesh.
[0060]
(Example 8)
FIG. 8 is a cross-sectional view of the essential parts of Embodiment 8 of the microwave oven of the present invention. In addition, the thing of the same code | symbol as Example 6 has the same structure, and abbreviate | omits description.
[0061]
In the present embodiment, the difference from the sixth embodiment is that the heating source is an induction heating means. In FIG. 8, an induction heating means 18 made of a heating coil is mechanically covered with a cover 19 made of a dielectric material such as heat-resistant glass.
[0062]
Next, the operation and action will be described. The induction magnetic field generated by the induction heating means 23 is not affected at all even if the cover 24 made of a dielectric material such as heat-resistant glass is provided, and the gap between the bottom surface of the heating container 12 and the induction heating means 23 is 5 mm to 10 mm. Even if there is a degree, the bottom of the heating container 12 can be heated sufficiently efficiently. Therefore, even if the heating container 12 is pulled out, the heating coil 23 as a heating source is not exposed to the outside, and therefore, the danger of damaging the heating coil 23 from the outside can be prevented.
[0063]
In the above embodiment, the radio wave sealing mechanism including the choke groove is shown. However, as the radio wave sealing mechanism, there are other realizing methods such as using a radio wave absorber or using the choke groove and the radio wave absorber in combination. Needless to say.
[0064]
【The invention's effect】
Or microwave oven according to the present onset bright as described provided with a heating container having an opening in the top drawer free from the body housing, the heating chamber confining the microwave in the lid portion provided on the heating vessel and the body casing side Since the heating container can be used as it is as the food placing portion, the configuration becomes simple. Furthermore, since the gap that directly affects radio wave leakage in the radio wave seal mechanism does not basically change with respect to the movement in the pull-out direction, radio wave leakage is prevented against movement in the pull-out direction of the heating container necessary for taking in and out food. I can do it.
[0065]
Further, the opening edge of the container pressurized heat between the lid portion, so to form a choke radiowave sealing mechanism consisting of the choke groove, and the opening peripheral edge portion and the lid portion of the heating vessel, for example 1mm approximately Even if there is a gap, radio wave leakage can be prevented by the choke action, and the heating container can be pulled out lightly.
[0066]
The choke groove provided on the periphery of the lid and the flange provided on the opening periphery of the heating container constitute a radio wave sealing mechanism, and only the flange is simply added to the heating container. As a result, it is possible to construct a simple and lightweight heating container that requires not only frequent handling such as taking in and out of food but also easy washing.
[0067]
Further, in the flange portion opposed to the choke groove forming the electrostatic wave seal mechanism, since the pull-out direction around the collar of the heating vessel is wider than the left and right collar, deviated with respect to the drawing direction before and after However, there is an effect that a sufficient radio wave leakage prevention function can be maintained.
[0068]
Further , one or more switch means are provided on the lower surface side of the lid portion for detecting a gap of a certain value or more between the lower surface of the lid portion and the flange portion of the heating container and detecting the gap. . Since this switch means is arranged on the lower surface of the lid portion, it cannot be easily operated from the outside using a rod, screwdriver, etc., so there is an effect that the stop of the microwave generator is not inadvertently released. .
[0069]
Further, since consists actuating section switch means is actuated in the vertical direction, since it can be easily operated even with a stick and drivers, etc. from the outside, to unsuspended inadvertently microwave generator There is an effect that there is no.
[0070]
In addition , a radio wave sealing mechanism is formed by the choke groove provided in the lid part and the flange part provided at the opening peripheral edge of the heating container, and the switch part is opened and closed by the collar part itself. This has the effect of setting and managing the gaps more accurately.
[0071]
Further, since the imparted together a function of detecting the extended state of the heating vessel to the switch means, not separately require detecting means for detecting the extended state of the heating vessel, yet rod Ya the detection means extended state from the outside The danger of being operated using a driver etc. can be prevented.
[0072]
Further, since provided on the main body casing side and mechanically independent from the heating vessel to the bottom under the heating vessel a heat source for heating the bottom wall of the container pressurized heat heating container is a simple, also lightweight, yet cables without It can be completely independent and separated, and has the effect that it can be used as a frying pan and can be washed as it is.
[0073]
Further, since the pressurized heat and radiant heating means such as a halogen lamp or an infrared heater, even if gaps between the bottom surface and the heating source of the heating vessel, there is an effect that efficiently heated vessel bottom to be heated.
[0074]
Further, since the configuration the bottom surface of the container pressurized heat in punching metal or wire mesh or the like, while the food directly heated can, be food debris falls from between the punching metal or wire mesh, pull out the heating vessel fell a heating source There is an effect that food waste etc. can be cleaned.
[0075]
Further, since the induction heating means pressurized heat source, even if gaps between the heating coil of the induction heating means and the bottom surface of the heating vessel, with can be heated efficiently heating the container bottom, the upper surface of the heating coil ceramic plate, etc. Since it can be completely shielded, there is an effect that a safe and clean configuration can be realized.
[Brief description of the drawings]
1 is a cross-sectional view of main parts of a microwave oven according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of main portions of a microwave oven according to Embodiment 2. FIG. FIG. 4 is a cross-sectional view of the main part of the surface perpendicular to the drawing direction of the microwave oven in the third embodiment. FIG. 4A is a cross-sectional view of the main portion of the microwave oven in the fourth embodiment. FIG. 5B is a cross-sectional view of the main part of the microwave oven according to the fourth embodiment. FIG. 5 is a cross-sectional view of the main portion of the microwave oven according to the fifth embodiment. 7] Cross-sectional view of main part of microwave oven in Example 7 [FIG. 8] Cross-sectional view of main part of microwave oven in Example 8 [FIG. 9] Cross-sectional view of main parts of conventional microwave oven [Description of reference numerals]
DESCRIPTION OF SYMBOLS 5 Main body housing | casing 6 Microwave generator 9 Power supply port 10 Choke groove 11 Cover part 12 Heating container 14 Collar part 15 Heating chamber 17 Switch means 18 Actuation part 20 Heating source 21 Punching metal 23 Induction heating means

Claims (9)

A microwave generator comprising a main body housing, a microwave generator provided in the main body housing, and a heating container having a drawer structure for placing food, and including a heating port and a feeding port covering an opening of the heating container. A heating chamber is formed with the lid, and a radio wave sealing mechanism for preventing leakage of radio waves is provided between the opening peripheral edge of the heating container and the lid facing the opening peripheral edge. In the microwave oven, a choke-type radio wave sealing mechanism is formed by a choke groove provided at a peripheral edge of the casing lid portion and a flange portion provided at an opening peripheral edge of the heating container so as to face the choke groove, and the heating container is drawn out. The microwave oven which made the width | variety of the said collar part before and behind the direction wider than the width | variety of the said collar part of right and left . 2. The microwave oven according to claim 1, wherein at least one switch means having a function of detecting a state in which the heating container is stored in the main body casing and stopping the operation of the microwave generator is provided on the lower surface side of the main body casing lid. The microwave oven according to claim 2, wherein the switch means includes an operation part that operates in a vertical direction. The microwave oven according to claim 2 or 3 , wherein the switch means is configured to be opened and closed by a flange portion provided opposite to the choke groove which is a radio wave sealing mechanism provided at the opening peripheral edge of the heating container. The microwave oven according to any one of claims 2 to 4, wherein the switch means is also provided with a function of detecting a drawing state of the heating container. The microwave oven according to any one of claims 1 to 5 , wherein a heating source for heating the bottom wall surface of the heating container is provided on the main body casing side mechanically independent from the heating container below the bottom surface of the heating container. The microwave oven according to claim 6, wherein the heating source is a radiant heating means. The microwave oven according to claim 6 or 7, wherein a bottom surface of the heating container is made of a punching metal or a metal mesh. The microwave oven according to claim 6, wherein the heating source is induction heating means.

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