Patent Description:
Conventionally, there has been proposed a heating cooker in which an illuminator is disposed beside a heating chamber in order to brighten the heating chamber, and a steam generator by which steam is supplied into the heating chamber to cook by heating is provided (for example, see PTL <NUM>).

The heating cooker described in PTL <NUM> includes two indoor lamps as an irradiation unit that irradiates the heating chamber with light. The interior lamp has a light source in which a hole formed in a side wall is covered with a light transmitting member and is disposed further outside the light transmitting member. Then, the interior lamp is configured such that the light irradiated from the light source passes through the light transmitting member and the hole to illuminate the inside of the heating chamber.

In the instance, the configuration of the conventional heating cooker has a possibility that steam may leak from the gap between the edge of a light transmission hole and the light transmitting member, which is formed on the side wall of the heating chamber.

PTL <NUM>: Unexamined <CIT>
<CIT> discloses a high frequency heating apparatus for heating an object to be heated is provided with an electromagnetic wave emission means for emitting electromagnetic waves, a local heating means capable of heating an optional portion of the object by the electromagnetic waves emitted from the emission means, and a control means for controlling the local heating means. The high frequency heating apparatus is further provided with a stage on which the object is placed, a protecting means for protecting the local heating means, a setting means and a detection means, so that the local heating means, the electromagnetic wave emission means or the stage is controlled in accordance with the setting means or the detection means.

The present invention provides a heating cooker capable of preventing steam from leaking from light transmission holes into a heating chamber.

One aspect of the present invention is a heating cooker including a heating chamber. The heating cooker includes: a side wall that defines one surface of an inner surface of the heating chamber; a first hole formed in the side wall; and a cover portion that has a second hole that is disposed outside the first hole and formed at a position facing the first hole and a flat portion formed along a periphery of the second hole. Furthermore, the heating cooker includes: a light transmitting member that faces the first hole and the second hole and abuts on the flat portion to be disposed in the cover portion; and an optical device disposed outside the cover portion, in which the optical device performs at least one of light emission to the heating chamber or light reception from the heating chamber through the first hole, the second hole, and the light transmitting member. The side wall has a bent portion cut and raised outward around the first hole.

This provides a heating cooker that can prevent steam from leaking into the heating chamber from the light transmission holes (the first hole and the second hole).

Hereinafter, an exemplary embodiment according to the present invention will be described in details with reference to the drawings. Note that the present invention is not limited by the exemplary embodiment.

Hereinafter, a heating cooker according to the exemplary embodiment of the present invention will be described with reference to <FIG> and <FIG>.

<FIG> is a front view of heating cooker <NUM> according to the exemplary embodiment. <FIG> is a front perspective view of heating cooker <NUM> with door <NUM> opened.

Note that in the following, the X direction is described as the longitudinal direction (width direction or left and right direction) of heating cooker <NUM>, the Y direction is described as the front-rear direction thereof, and the Z direction is described as the height direction thereof. In addition, the height in the following description refers to a distance from the mounting surface of heating cooker <NUM>.

As illustrated in <FIG> and <FIG>, heating cooker <NUM> according to the exemplary embodiment includes housing <NUM>, heating chamber <NUM> disposed in housing <NUM>, door <NUM> that openably covers opening 3b opened in front frame 3a serving as a front surface of housing <NUM>, and the like.

Heating chamber <NUM> is configured by a space formed by being surrounded by upper wall 5a disposed at the upper portion, side walls 5b and 5c disposed at both sides, a rear wall (not shown) disposed at the rear portion, and bottom wall 5e disposed at the lower portion. Heating chamber <NUM> includes a microwave radiation port (not shown) for radiating microwaves. Heating chamber <NUM> is configured to dielectrically heat the object to be heated (food) placed in heating chamber <NUM> by the microwave radiated from the microwave radiation port. In addition, heating chamber <NUM> includes a steam outlet (not shown) in the upper portion. Thereby, the steam generated by steam generator <NUM> (see <FIG>) is supplied into heating chamber <NUM>.

Door <NUM> includes a rotation center in the horizontal direction on the lower side of the opening 3b. Thereby, door <NUM> is openably attached to the housing <NUM> with the rotation center as the rotation axis. Door <NUM> includes handle 7a mounted on the upper portion. When the user pulls handle 7a forward and downward, door <NUM> is rotated so as to be in a horizontal state. Thereby, heating chamber <NUM> is opened. In addition, heating chamber <NUM> is closed by the user rotating door <NUM> so as to be in the vertical state.

Door <NUM> includes display unit <NUM>, operation unit <NUM>, and the like disposed near the other side (right side) in the longitudinal direction (X direction) in the front view. Display unit <NUM> includes, for example, a liquid crystal screen, and displays a menu screen and the like. Operation unit <NUM> includes functions such as a push button, a dial, and the like. The user can set various cooking instructions and the like in heating cooker <NUM> using operation unit <NUM>.

Housing <NUM> is coupled to lower frame <NUM> at the lower end. First tray <NUM> and second tray <NUM> are disposed on lower frame <NUM> detachably in the front-rear direction. First tray <NUM> and second tray <NUM> are disposed side by side in the longitudinal direction (X direction). For example, first tray <NUM> is disposed on one side (left side) in the longitudinal direction, and second tray <NUM> is disposed on the other side (right side) in the longitudinal direction. First tray <NUM> is a tray for storing, for example, waterdrops that have condensed in heating cooker <NUM>. Second tray <NUM> houses a water supply tank (not shown) for supplying water to steam generator <NUM> (see <FIG>) disposed outside side wall 5b of heating chamber <NUM>. Note that, hereinafter, one side in the longitudinal direction will be described as a left side, and the other side will be described as a right side in the front view of heating cooker <NUM>.

Next, the configuration in the vicinity of heating chamber <NUM> will be described with reference to <FIG> is a front perspective view of heating chamber <NUM>.

As illustrated in <FIG>, heat-insulating metal plate <NUM> is disposed on upper wall 5a of heating chamber <NUM> and the outer surface of side wall 5b and side wall 5c. Note that <FIG> illustrates side metal plate 12c attached to the outer surface of side wall 5c as heat-insulating metal plate <NUM>. Side metal plate 12c covers the outer surface of side wall 5c.

Side metal plate 12c includes illuminator <NUM> mounted near the upper front. Illuminator <NUM> includes, for example, first illuminator 21a and second illuminator 21b that are included in the optical device of the present application. First illuminator 21a and second illuminator 21b are disposed side by side at a predetermined interval (for example, with about <NUM>) in the vertical direction. First illuminator 21a and second illuminator 21b are configured by, for example, light emitting diode (LED) illumination devices. First illuminator 21a and second illuminator 21b have LED element 21aa and LED element 21ba as light emitting elements, respectively (see <FIG>).

Next, the configuration in the vicinity of the other side in the longitudinal direction of heating chamber <NUM> will be described with reference to <FIG> is a partially enlarged view in the vicinity of the upper front portion of the side wall 5c on the other side (right side) in the longitudinal direction (X direction) of the heating chamber.

As illustrated in <FIG>, illuminator <NUM> is attached to side metal plate 12c with heat shielding metal plate <NUM> further interposed between illuminator <NUM> and side metal plate 12c. Specifically, each of first illuminator 21a and second illuminator 21b is attached to side metal plate 12c of heat-insulating metal plate <NUM> via heat shielding metal plate <NUM>. Heat shielding metal plate <NUM> has a size (area) that slightly protrudes from the outer periphery of first illuminator 21a and second illuminator 21b. Heat shielding metal plate <NUM> includes first flange 23c, second flange 23d, and the like. First flange 23c is formed by bending outward (X direction) from the upper edge of heat shielding metal plate <NUM>. Second flange 23d is formed by bending outward (in X direction) from the front edge of heat shielding metal plate <NUM>.

Next, the configuration in the vicinity of the other side in the longitudinal direction of heating chamber <NUM> will be described in more details with reference to <FIG> is an exploded perspective view in the vicinity of side wall 5c on the other side (right side) in the longitudinal direction (X direction) of heating chamber <NUM>.

As illustrated in <FIG>, cover portion <NUM>, light transmitting member <NUM>, side metal plate 12c of heat-insulating metal plate <NUM>, heat shielding metal plate <NUM>, illuminator <NUM>, and the like are disposed in stated order from side wall 5c on side wall 5c of heating chamber <NUM>. Note that heat shielding metal plate <NUM> configures the second metal plate, and includes metal plate 23e and metal plate 23f.

Side metal plate 12c has a pair of holes 12ca disposed at positions vertically separated from each other, a pair of hooks 12cb provided in respective holes 12ca, and the like. Each of the holes 12ca allows light irradiated from illuminator <NUM> to pass therethrough. The pair of hooks 12cb are formed by bending outward (X direction) from each side of the front end and the rear end of each hole 12ca. Furthermore, side metal plate 12c has flange 12cc formed by bending inward (-X direction) from the upper edge and the lower edge.

Heating chamber <NUM> has flange 5cc formed by bending outward (X direction) from the upper edge and the lower edge of side wall 5c. Then, corresponding flange 12cc of side metal plate 12c and flange 5cc of side wall 5c are coupled. Thereby, side metal plate 12c and side wall 5c of heating chamber <NUM> are connected. At this time, a space is formed between flange 5cc of side wall 5c of heating chamber <NUM> and flange 12cc of side metal plate 12c. In the formed space, cover portion <NUM>, light transmitting member <NUM>, and the like described later are disposed.

In addition, metal plate 23e and metal plate 23f that are heat shielding metal plates <NUM> are disposed at predetermined positions vertically separated from each other (for example, with a gap of about <NUM>). Each of metal plate 23e and metal plate 23f has hole 23a formed near the center and a pair of holes 23b. Hole 23a allows light irradiated from illuminator <NUM> to pass therethrough. The pair of holes 23b is formed in the front-rear direction (Y direction) of hole 23a. A pair of hooks 12cb of side metal plate 12c provided facing each other are inserted into the pair of holes 23b, respectively. Thereby, metal plate 23e and metal plate 23f that are heat shielding metal plates <NUM> and side metal plate 12c are engaged with each other.

Light transmitting member <NUM> is made of a plate-like member through which light irradiated from illuminator <NUM> can pass. Light transmitting member <NUM> is formed of, for example, a glass plate. Note that light transmitting member <NUM> may be made of a thermosetting resin plate such as silicone, or a resin film such as polyimide, in addition to the glass plate. Light transmitting member <NUM> is disposed at a position facing a pair of holes 12ca formed in side metal plate 12c of heat-insulating metal plate <NUM>.

Next, the configuration of the outer side surface on the other side in the longitudinal direction of heating chamber <NUM> will be described with reference to <FIG> is an outer side view of the other side (right side) of heating chamber <NUM> in the longitudinal direction. Specifically, <FIG> is an outer side view of side wall 5c of heating chamber <NUM> with side metal plate 12c illustrated in <FIG> removed.

As illustrated in <FIG>, cover portion <NUM> is attached near the upper front portion of the side wall 5c on the other side of heating chamber <NUM> by, for example, swaging. Here, light transmitting member <NUM> is formed in, for example, a rectangular shape that is longer in the vertical direction (Z direction) than in the front-rear direction (Y direction) in a side view.

Next, the configuration in the vicinity of cover portion <NUM> will be described with reference to <FIG> and <FIG>. <FIG> is a front perspective view of cover portion <NUM> with light transmitting member <NUM> attached. <FIG> is a front perspective view of cover portion <NUM> with light transmitting member <NUM> removed.

As illustrated in <FIG> and <FIG>, cover portion <NUM> has first stopper <NUM> cut and raised outward from the center in the height direction of the outer surface of cover portion <NUM> on the rear side from the center in the front-rear direction. First stopper <NUM> has, for example, an L-shaped cross section in the X direction and extends vertically, and has two protrusions 27ga protruding inward (-X direction) near the top end in the vertical direction. In addition, cover portion <NUM> has a concave portion 27p protruding outward (X direction) at a position facing first stopper <NUM> on the front side from the center in the front-rear direction. Furthermore, cover portion <NUM> has, for example, semicircular protrusion <NUM> that protrudes outward (X direction) in a side view. Protrusion <NUM> is formed to protrude outward (X direction) from concave portion 27p of cover portion <NUM>.

When light transmitting member <NUM> is inserted into cover portion <NUM> having the above-described configuration, a portion of the side surface on the rear side of light transmitting member <NUM> abuts on first stopper <NUM>, and a portion of the side surface on the front side of light transmitting member <NUM> abuts on protrusion <NUM>. Thereby, light transmitting member <NUM> is fitted with first stopper <NUM> and protrusion <NUM> of cover portion <NUM>. As a result, the movement of light transmitting member <NUM> in the front-rear direction is restricted by the fitting. That is, above-described protrusion <NUM> and first stopper <NUM> configure a lateral restricting portion for light transmitting member <NUM>.

As illustrated in <FIG>, cover portion <NUM> has two second stoppers <NUM> bent outward (in the X direction) from the upper end in a claw shape. In addition, cover portion <NUM> has third stopper <NUM> cut and raised outward (X direction) in the vicinity of the lower front portion of the outer surface. Third stopper <NUM> has, for example, an L-shaped cross section in the Z direction, extends in the front-rear direction (Y direction), and has protrusion 27ma protruding inward (-X direction). Furthermore, cover portion <NUM> has fourth stopper 27n that is bent in a claw shape outward (X direction) at a central portion near the lower end.

When light transmitting member <NUM> is inserted into cover portion <NUM> having the above-described configuration, the upper side surface of light transmitting member <NUM> abuts on two second stoppers <NUM>, and the lower side surface of light transmitting member <NUM> abuts on third stopper <NUM> and fourth stopper 27n. Thereby, the vertical movement of light transmitting member <NUM> is restricted. That is, second stopper <NUM>, third stopper <NUM>, and fourth stopper 27n configure a height direction restricting portion for light transmitting member <NUM>.

Then, the fitting between light transmitting member <NUM> and protrusion <NUM> can be released by pulling light transmitting member <NUM> attached to cover portion <NUM> outward (X direction). This allows light transmitting member <NUM> to slide forward. Therefore, light transmitting member <NUM> can be easily removed from cover portion <NUM>.

On the other hand, when light transmitting member <NUM> is attached to cover portion <NUM>, the rear end of light transmitting member <NUM> is pressed against first stopper <NUM>. Then, the front end of light transmitting member <NUM> is pressed inward. Thereby, protrusion <NUM> of cover portion <NUM> and light transmitting member <NUM> are fitted. At this time, light transmitting member <NUM> is pressed against first flat portion 27c and second flat portion 27d of cover portion <NUM> by two protrusions 27ga of first stopper <NUM> and protrusion 27ma of third stopper <NUM> that are formed to protrude inward (-X direction). Thereby, light transmitting member <NUM> is fixed to cover portion <NUM>. That is, as described above, cover portion <NUM> functions as a metal plate for attaching light transmitting member <NUM>. Note that first flat portion 27c and second flat portion 27d are examples or generic names of flat portions.

Furthermore, cover portion <NUM> has first concave portion 27a and second concave portion 27b that protrude outward (X direction). First concave portion 27a and second concave portion 27b are disposed at a predetermined interval (for example, about <NUM>) in the vertical direction (Z direction). First concave portion 27a has above-described first flat portion 27c at the bottom (outer portion). First flat portion 27c is formed with hole 27e included in a second hole of the present application. That is, a flat region is formed around hole 27e by first flat portion 27c. Hole 27e allows the light radiated from first illuminator 21a to pass therethrough.

In addition, second concave portion 27b has above-described second flat portion 27d at the bottom (outer portion). In second flat portion 27d, hole 27f included in the second hole of the present application is formed. That is, a flat region is formed around hole 27f by second flat portion 27d. Hole 27f allows light radiated from second illuminator 21b to pass therethrough.

Next, the configuration in the vicinity of illuminator <NUM> will be described with reference to <FIG>. Specifically, <FIG> is a cross-sectional view in the vicinity of first illuminator 21a and second illuminator 21b that are included in illuminator <NUM>.

As illustrated in <FIG>, heating chamber <NUM> has a pair of holes 5ca that are included in the first hole of the present application for radiating respective pieces of light radiated from first illuminator 21a and second illuminator 21b that are included in illuminator <NUM> into heating chamber <NUM> on side wall 5c. In addition, side wall 5c has bent portion 5cb formed around respective holes 5ca by cutting and raising side wall 5c outwardly of hole 5ca (X direction). Bent portion 5cb reduces radio waves leaking from the inside of heating chamber <NUM> to the outside through respective holes 5ca by an effect generally called a choke effect. At this time, bent portion 5cb is formed such that the bending height in the X direction is smaller than the depth of first concave portion 27a and second concave portion 27b of cover portion <NUM> in the X direction.

For this reason, first flat portion 27c and second flat portion 27d of cover portion <NUM> abut on light transmitting member <NUM> in a close contact state outside (X direction) of the tip of bent portion 5cb of side wall 5c. That is, bent portion 5cb of side wall 5c and light transmitting member <NUM> are disposed so as not to directly contact with each other. In addition, the surfaces of first flat portion 27c and second flat portion 27d of cover portion <NUM>, and the surface of light transmitting member <NUM> abut on each other. Therefore, even if light transmitting member <NUM> vibrates, the occurrence of scratches, cracks, and the like due to contact with bent portion 5cb is reliably prevented. Furthermore, since the surfaces come into contact with each other, leakage of steam from between first flat portion 27c and second flat portion 27d, and light transmitting member <NUM> can be significantly reduced. In addition, according to the above configuration, since no scratch or the like occurs on light transmitting member <NUM>, the steam in heating chamber <NUM> does not leak from the gap of any scratch through holes 5ca.

In addition, heating chamber <NUM> includes a machine room (not shown) therebelow. A cooling fan (not shown) is disposed in the machine room. Thereby, the cooling air generated by the cooling fan (not shown) flows from below to above on side metal plate 12c. At this time, the cooling air flows behind the substrate of first illuminator 21a and second illuminator 21b. Therefore, LED elements 21aa and 21ba are cooled from the back side of the substrate. Thereby, the influence of the heat generated by heating the object to be heated in heating chamber <NUM> on first illuminator 21a and second illuminator 21b can be reduced.

In addition, as illustrated in <FIG>, light transmitting member <NUM> and cover portion <NUM>, and side metal plate 12c are disposed in a non-contact manner. That is, a gap is provided between light transmitting member <NUM> and cover portion <NUM>, and side metal plate 12c. Therefore, the conducting heat from side wall 5c of heating chamber <NUM> to light transmitting member <NUM> and cover portion <NUM> can be reduced to conduct to side metal plate 12c by the gap. Thereby, the influence of heat on LED elements 21aa and 21ba can be reduced.

As described above, heating cooker <NUM> according to the above-described exemplary embodiment includes heating chamber <NUM>, side wall 5c that defines one surface of the right inner surface of heating chamber <NUM>, and a pair of holes 5ca included in the first hole formed in side wall 5c. In addition, heating cooker <NUM> includes cover portion <NUM> having hole 27e and hole 27f included in the second holes that are disposed outside the pair of holes 5ca and overlap respective holes 5ca, and first flat portion 27c and second flat portion 27d included in a flat portion formed along the periphery of the hole 27e and hole 27f. Furthermore, heating cooker <NUM> includes light transmitting member <NUM> that faces the pair of holes 5ca and hole 27e and hole 27f, and is provided on cover portion <NUM> to abut on first flat portion 27c and second flat portion 27d, and illuminator <NUM> made of first illuminator 21a and second illuminator 21b included in an optical device disposed outside cover portion <NUM> for performing at least one of light emission to heating chamber <NUM> and light reception from heating chamber <NUM> via hole 5ca, hole 27e, hole 27f and light transmission member <NUM>. In addition, side wall 5c has bent portion 5cb that is cut and raised outwardly around each of the pair of holes 5ca.

The following effects can be obtained from the configuration of heating cooker <NUM> described above.

First, bent portion 5cb cut and raised toward the outside of side wall 5c is formed around a pair of holes 5ca formed in side wall 5c of heating chamber <NUM>. This can prevent a radio wave such as a microwave radiated into heating chamber <NUM> from leaking to the outside of heating chamber <NUM> through holes 5ca.

In addition, light transmitting member <NUM> is disposed via cover portion <NUM> without directly abutting on a pair of holes 5ca formed in side wall 5c of heating chamber <NUM>. Thereby, even if bent portion 5cb of side wall 5c vibrates due to the vibration in heating chamber <NUM>, bent portion 5cb does not damage light transmitting member <NUM>.

In addition, the surfaces of first flat portion 27c and second flat portion 27d that are included in the flat portion of cover portion <NUM>, and the surface of light transmitting member <NUM> abut on each other in a state of being in close contact with each other. Thus, even if the flat portion and light transmitting member <NUM> relatively move due to vibration or the like, the surface of light transmitting member <NUM> is hardly damaged. Furthermore, since light transmitting member <NUM> is disposed to abut on cover portion <NUM>, leakage of the generated steam to the outside from heating chamber <NUM> through hole 5ca can be more reliably prevented.

In addition, heating cooker <NUM> according to the above-described exemplary embodiment includes side metal plate 12c of heat-insulating metal plate <NUM> that is included in the first metal plate and is disposed outside light transmitting member <NUM>, and Illuminator <NUM> that is included in the optical device is attached to side metal plate 12c. Side metal plate 12c provides a heat insulating effect of suppressing the heat generated in heating chamber <NUM> from radiating to the outside. Thereby, the ambient temperature of illuminator <NUM> can be reduced lower than the temperature in heating chamber <NUM>. As a result, the influence of heat from the inside of heating chamber <NUM> on illuminator <NUM> can be reduced.

In addition, heating cooker <NUM> according to the above-described exemplary embodiment includes heat shielding metal plate <NUM> that is disposed between illuminator <NUM> and side metal plate 12c and included in a second metal plate, and illuminator <NUM> is attached to side metal plate 12c via heat shielding metal plate <NUM>. That is, heat shielding metal plate <NUM> different from side metal plate 12c is further provided. Thereby, high heat shielding effect for illuminator <NUM> can be obtained. As a result, the influence of heat on illuminator <NUM> can be further reduced.

In addition, heating cooker <NUM> according to the above-described exemplary embodiment has a pair of holes 5ca in side wall 5c, and cover portion <NUM> has hole 27e and hole 27f that correspond to each of the pair of holes 5ca and included in the second holes, first flat portion 27c, and second flat portion 27d. Light transmitting member <NUM> is disposed to abut on a pair of first flat portion 27c and second flat portion 27d that face a pair of holes 5ca included in the first holes and a pair of holes 27e and 27f included in the second holes, and that are included in the flat portion. Thereby, one light transmitting member <NUM> is disposed for the pair of holes 27e and 27f of cover portion <NUM>. Therefore, the size of light transmitting member <NUM> can be set to a size that is larger than the pair of holes 27e and 27f, so that light transmitting member <NUM> can be easily attached to cover portion <NUM>.

In addition, in heating cooker <NUM> according to the above-described exemplary embodiment, cover portion <NUM> has first stopper <NUM> and protrusion <NUM> included in the front-rear direction restricting portion that restricts the movement of light transmitting member <NUM> in the front-rear direction (Y direction), and second stopper <NUM> and third stopper <NUM> included in the height direction restricting portion that restricts the movement of light transmitting member <NUM> in the height direction (Z direction). With these configurations, light transmitting member <NUM> can be stably mounted at an appropriate position on cover portion <NUM>. Furthermore, the positional deviation of light transmitting member <NUM> due to vibration or the like can be suppressed more reliably.

The present invention is not limited to the heating cooker according to the above-described exemplary embodiment, and may be configured as a heating cooker according to an exemplary embodiment illustrated in the following modified examples.

That is, in the above-described exemplary embodiment, the optical device made of illuminator <NUM> having the LED elements has been described as an example of the light emitting element, but the light emitting element is not limited thereto. For example, an imaging element or a light receiving element may be disposed as the optical device. In addition, these may be combined and disposed as an optical device. Specifically, examples of the image element include a complementary metal oxide semiconductor (CMOS) image sensor and a charge-coupled device (CCD) image sensor. In addition, examples of the light receiving element include an infrared temperature sensor.

As described above, one aspect of the present invention is a heating cooker including a heating chamber. The heating cooker includes: a side wall that defines one surface of the inner surface of the heating chamber; a first hole formed in the side wall; and a cover portion that has a second hole that is disposed outside the first hole and faces the first hole and a flat portion formed along the periphery of the second hole. Furthermore, the heating cooker includes: a light transmitting member that faces the first hole and the second hole and abuts on the flat portion to be disposed in the cover portion; and an optical device disposed outside the cover portion, in which the optical device performs at least one of light emission to the heating chamber and light reception from the heating chamber through the first hole, the second hole, and the light transmitting member. The side wall has a bent portion cut and raised outward around the first hole.

In addition, the heating cooker may include a first metal plate disposed outside the light transmitting member, and the optical device may be attached to the first metal plate.

In addition, the heating cooker may include a second metal plate disposed between the optical device and the first metal plate, and the optical device may be attached to the first metal plate via the second metal plate.

In addition, the side wall has a pair of first holes, and the cover portion has a pair of second holes and a pair of flat portions corresponding to the pair of first holes, respectively. The light transmitting member may be disposed so as to face the pair of the first holes and the pair of the second holes and abut on the pair of flat portions.

In addition, the cover portion may include a front-rear direction restricting portion that restricts movement of the light transmitting member in the front-rear direction (Y direction), and a height direction restricting portion that restricts movement of the light transmitting member in the height direction (Z direction).

In addition, the optical device may be an illuminator.

Claim 1:
A heating cooker (<NUM>) including a heating chamber (<NUM>) configured so that a microwave is radiated thereinto and a steam generator (<NUM>), the heating cooker (<NUM>) comprising:
a side wall (5b, 5c) defining one surface of an inner surface of the heating chamber (<NUM>);
a first hole (5ca) formed in the side wall (5b, 5c);
a cover portion (<NUM>) that has a second hole (27e) and a flat portion (27c, 27d), the second hole (27e) being disposed outside the first hole (5ca) and facing the first hole (5ca), the flat portion (27c, 27d) being along a periphery of the second hole (27e);
a light transmitting member (<NUM>) that faces the first hole (5ca) and the second hole (27e), and is disposed on the cover portion (<NUM>) and abuts on the flat portion (27c, 27d); and
an optical device (<NUM>) disposed outside the cover portion (<NUM>),
wherein the side wall (5b, 5c) has a bent portion (5cb) cut and raised outward around the first hole (5ca), and having an outward bending height.