JP6063702B2 - Cooker door and cooker provided with the same - Google Patents

Description

  The present invention relates to a door of a cooking device, and also relates to a cooking device provided with the door.

  Conventionally, as a door, there is a door that is used in a heating cooker that heats an object to be heated in a heating chamber by radio waves, and opens and closes an opening on the front side of the heating chamber (for example, JP 2011-85307 A (Patent) Reference 1)). This door is provided with a plurality of comb teeth in order to prevent radio waves from the inside of the heating chamber from leaking outside the cooking device.

JP 2011-85307 A

  By the way, the said comb teeth are normally provided in the peripheral part of the metal plate by punching and bending a flat metal plate. In this case, it is preferable to reduce the thickness of the metal plate because punching and bending are facilitated.

  However, if the thickness of the metal plate is reduced, for example, during assembly, the comb teeth are easily deformed, and the effect of suppressing radio wave leakage by the comb teeth is reduced.

  Therefore, the door of the conventional cooking device has a problem that the effect of suppressing leakage of radio waves may be reduced.

  Even if the comb teeth are deformed by 0.1 mm in the thickness direction, the effect of preventing radio wave leakage is greatly reduced.

  Then, the subject of this invention is providing the door of the heating cooker which can prevent the fall of the leakage suppression effect of an electromagnetic wave.

  Moreover, the other subject of this invention is providing the heating cooker provided with such a door.

In order to solve the above problems, the door of the heating cooker of the present invention,
The door body,
Comb teeth provided on the inner surface side of the door body to suppress leakage of radio waves,
A comb cover covering the comb teeth,
The comb tooth cover has a comb tooth holding portion for holding the comb teeth ,
The comb teeth have protrusions provided on at least one side,
The comb-teeth holding part is an extending part that extends toward the door body,
The protrusion is fitted into the extending portion .

According to the said structure, since the said comb-tooth holding | maintenance part hold | maintains a comb tooth, a deformation | transformation of a comb tooth can be prevented. Therefore, it is possible to prevent the radio wave leakage suppressing effect from being lowered by the comb teeth. The extending portion extends toward the door main body, and the protrusion is fitted. Therefore, when the comb teeth are covered with the comb teeth cover, the comb teeth holding portion can hold the comb teeth. That is, the work for holding the comb teeth in the comb tooth holding part can be performed by covering the comb teeth with the door cover.

In one embodiment of the cooker door,
The comb tooth cover also serves as a door cover for protecting the inner surface of the door body.

  According to the above embodiment, the comb cover also serves as a door cover that protects the inner surface of the door body, and thus can prevent an increase in the number of parts. Therefore, the manufacturing process can be simplified and the mass productivity can be improved.

In one embodiment of the cooker door,
The extending portion includes a pair of ribs,
The protrusion is sandwiched between the pair of ribs.

The heating cooker of the present invention is
While having an opening on the front side, a heating chamber that accommodates an object to be heated through this opening,
A radio wave generator for generating radio waves for heating the object to be heated;
It is characterized by comprising the door of the cooking device of the present invention or one embodiment for opening and closing the opening.

  According to the said structure, since the door of the heating cooker of this invention or one Embodiment is provided, safety | security can be improved and a user can be provided with a sense of security at the time of use.

  The door of the heating cooker of the present invention includes a door body, comb teeth that are provided on the inner surface side of the door body, and suppress leakage of radio waves, and a comb tooth cover that covers the comb teeth. Since the comb teeth can be prevented from being deformed by having the comb teeth holding portion for holding the comb teeth, it is possible to prevent the radio wave leakage suppressing effect from being lowered by the comb teeth.

  Since the cooking device of the present invention includes the door of the cooking device of the present invention or one embodiment, safety can be improved and the user can use it with peace of mind.

FIG. 1 is a schematic perspective view of a microwave oven according to an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the door of the microwave oven. FIG. 3 is a schematic cross-sectional view of the door panel assembly of the door. FIG. 4 is a schematic perspective view of the door frame of the door. FIG. 5 is an enlarged perspective view of the outer peripheral edge of the door panel. FIG. 6 is an enlarged perspective view of the outer peripheral edge of the door panel assembly. FIG. 7 is a schematic perspective view of a comb tooth according to another embodiment of the present invention. FIG. 8 is a schematic perspective view of comb teeth according to another embodiment of the present invention.

  Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

  FIG. 1 is a schematic perspective view of a microwave oven according to an embodiment of the present invention as viewed from the front and obliquely above.

  The microwave oven includes a casing 1, a heating chamber 2 provided in the casing 1 and having an opening 2 a on the front side, and a door 3 for opening and closing the opening 21 of the heating chamber 2. An operation panel 4 is provided on the right side of the door 3. Further, between the right side wall of the casing 1 and the right side wall of the heating chamber 2, for example, a magnetron 50 that generates a microwave of 2.45 GHz is installed. The microwave is an example of a radio wave, and the magnetron 50 is an example of a radio wave generator.

  The heating chamber 2 accommodates an object to be heated (for example, Chinese bun and rice) 100 through the opening 21. Further, below the heating chamber 2, the microwave from the magnetron 50 is guided by a waveguide (not shown). The microwave is emitted upward in the heating chamber 2 while being stirred by a rotating antenna (not shown) that is driven to rotate below the heating chamber 2. Thereby, the to-be-heated material 100 can be heated uniformly, still with respect to the heating chamber 2. FIG.

  The operation panel 4 includes a plurality of buttons 401 that the user presses to set the heating time and the liquid crystal display unit 402 that displays the heating time set by the user. A magnetron 50 is disposed behind the operation panel 4.

  FIG. 2 is a schematic exploded perspective view of the door 3.

  The door 3 includes a heat-resistant outer glass 5, a metal or resin door frame 6, a door panel assembly 7, and a resin door cover 8 that protects the inner surface of the door frame 6. The door frame 6 is an example of a door body, and the door cover 8 is an example of a comb tooth cover.

  The outer glass 5 is fixed to the portion of the door frame 6 opposite to the heating chamber 2 with an adhesive. Moreover, although the peripheral part of the outer side glass 5 is colored and becomes opaque, even if the door 3 is closed, the center part of the outer side glass 5 can be seen so that a user can visually recognize the to-be-heated object 100 in the heating chamber 2. Is transparent.

  The door frame 6 is a frame having a window 61 closed at the center by the outer glass 5. The lower end portion of the door frame 6 is attached to the front surface of the casing 1 so as to be rotatable in the vertical direction. A handle 62 is provided on the upper portion of the door frame 6, and the user holds the handle 62 and rotates the door frame 6 in the vertical direction.

  The door panel assembly 7 is fixed to a portion of the door frame 6 on the heating chamber 2 side with screws (not shown).

  The door cover 8 is attached to a portion of the door frame 6 on the heating chamber 2 side. More specifically, the door cover 8 is fitted into a space inside the door frame 6 and covers a plurality of comb teeth 96 (shown in FIGS. 3 to 6). The door cover 8 has a substantially square shape in plan view, and the inner glass 10 (shown in FIG. 3) is exposed without being covered by the door cover 8.

  FIG. 3 is a schematic cross-sectional view of the door panel assembly 7 cut along a plane parallel to the thickness direction of the inner glass 10.

  The door panel assembly 7 includes a metal door panel 9 and an inner glass 10 made of heat-resistant glass.

  In order to suppress leakage of microwaves from the central portion of the door panel 9, the central portion of the door panel 9 is a punching metal 91. An inner flat portion 93 is connected to the peripheral portion of the punching metal 91 through a connection portion 92 that is inclined with respect to the thickness direction of the punching metal 91. The inner flat portion 93 is substantially parallel to the peripheral edge of the opening 21 of the heating chamber 2 when the door 3 is closed. The outer flat portion 95 is connected to the peripheral portion of the inner flat portion 93 via a connecting portion 94 extending in a direction substantially parallel to the thickness direction of the punching metal 91. The outer flat portion 95 is substantially parallel to the inner flat portion 93 and is located closer to the door frame 6 than the inner flat portion 93. A plurality of comb teeth 96 are erected in the vicinity of the outer peripheral edge portion of the outer flat portion 95 so that microwave leakage from the outer peripheral edge portion of the door panel 9 can be suppressed. Such a door panel 9 is formed by punching and bending a flat metal plate.

  The inner glass 10 is fixed to the door panel 9 with an adhesive so as to cover the punching metal 91. Thereby, when the door 3 is closed, the inner glass 10 faces the opening 21 of the heating chamber 2.

  Note that G in FIG. 3 is a gap between the tips of the comb teeth 96 and the connection portion 94. The gap G greatly affects the effect of suppressing leakage of microwaves from the outer peripheral edge of the door panel 9.

  FIG. 4 is a schematic perspective view of the door frame 6 to which the door panel assembly 7 is attached as viewed obliquely from behind.

The door frame 6 has a front surface portion 63 positioned around the inner glass 10 (shown in FIG. 2) and a peripheral edge portion 64 erected on the outer peripheral edge portion of the front surface portion 63. The door panel assembly 7 is disposed in a region surrounded by the peripheral edge portion 64. Further, the peripheral portion 64 extends in a direction substantially parallel to the thickness direction of the inner glass 10, in a direction perpendicular to the thickness direction of the inner glass 10, facing the plurality of comb teeth 96.

  FIG. 5 is an enlarged perspective view of the outer peripheral edge of the door panel 9.

  Each of the plurality of comb teeth 96 extends from the vicinity of the outer peripheral edge of the outer flat portion 95 in a direction substantially parallel to the thickness direction of the inner glass 10, bends toward the connecting portion 94, and It extends in a direction substantially perpendicular to the thickness direction, and further bends to the outer flat portion 95 side, and extends in a direction inclined with respect to the thickness direction of the inner glass 10. That is, each comb tooth 96 includes a base portion 961 extending in a direction substantially parallel to the thickness direction of the inner glass 10, a connecting portion 962 extending in a direction substantially perpendicular to the thickness direction of the inner glass 10, A tip portion 963 extending in a direction inclined with respect to the thickness direction of the glass 10. The end portion of the base portion 961 on the outer flat portion 95 side has a shape such that the width becomes narrower as the distance from the outer flat portion 95 increases. Further, a protrusion 964 is provided on one side of the base 961, while a protrusion 965 is provided on the other side of the base 961. The thickness of the base portion 961, the connecting portion 962, and the distal end portion 963 is set to 0.6 mm, for example. The thickness direction of the inner glass 10 is the same as the thickness direction of the inner glass 5.

  FIG. 6 is an enlarged perspective view of the outer peripheral edge of the door panel assembly 7 to which the door cover 8 is attached. FIG. 6 shows a cross section in which the door panel assembly 7 and the door cover 8 are cut in a plane parallel to the thickness direction of the inner glass 10, and the door frame 6 and the door packing 11 are indicated by a two-dot chain line. Yes.

  On the surface of the door cover 8 on the side of the comb teeth 96, a plurality of pairs of ribs 81 and 82 that sandwich the protrusion 964 are provided. Each of the end portions of the ribs 81 and 82 has a shape whose width becomes narrower as it approaches the outer flat portion 95 side. Thereby, the gap between the rib 81 and the rib 82 is larger on the outer flat portion 95 side than on the door cover 8 side. The ribs 81 and 82 are an example of a comb-teeth holding part and an example of an extending part. In FIG. 6, only a pair of ribs 81 and 82 are shown.

  The outer peripheral edge of the door cover 8 abuts on the inner peripheral surface of the peripheral edge 64 of the door frame 6. On the other hand, a door packing 11 is attached to the inner peripheral edge of the door cover 8. The door packing 11 comes into contact with the outer peripheral surface of the connection portion 94 of the door panel 9, and the space between the inner peripheral edge portion of the door cover 8 and the connection portion 94 of the door panel 9 is sealed. Further, the end of the door packing 11 on the side of the heating chamber 2 (shown in FIG. 1) abuts on the peripheral edge of the opening 21 of the heating chamber 2 when the door 3 is closed, and the inner peripheral edge of the door cover 8. The space between the opening 21 of the heating chamber 2 is sealed. That is, the door 3 (shown in FIGS. 1 and 2) prevents water vapor in the heating chamber 2 from entering the inside of the door 3 or leaking through the vicinity of the peripheral edge of the opening 21 of the heating chamber 2. It has a structure to prevent it.

  Although not shown, a plurality of pairs of ribs that sandwich the protrusions 965 are provided on the surface of the door cover 8 on the side of the comb teeth 96. This pair of ribs has the same shape as the ribs 81 and 82, and is an example of a comb-teeth holding part and an example of an extending part.

  According to the microwave oven having the above configuration, when the door 3 is assembled, the ribs 81 and 82 sandwich the protrusion 964 and the rib sandwiches the protrusion 965, so that the comb teeth 96 can be held by the ribs 81 and 82. Therefore, when the door 3 is assembled, the deformation of the base 961 of the comb teeth 96 in the thickness direction can be prevented. That is, the gap G between the tips of the comb teeth 96 and the connection portion 94 can be maintained at the target value. As a result, it is possible to prevent the microwave leakage suppression effect from being lowered by the comb teeth 96.

  Even if the base 961 of the comb teeth 6 is deformed before the door cover 8 is attached to the door panel assembly 7, the gap between the rib 81 and the rib 82 is a flat portion outside the door cover 8 side. Since the 95 side is large, the projection 964 can be inserted into the gap between the ribs 81 and 82, and the projection 965 can be inserted into the gap between the ribs. As a result, the protrusions 964 can be held between the ribs 81 and 82, and the protrusions 965 can be held between the ribs to correct the deformation of the base 961 of the comb teeth 96.

  Moreover, since the said door cover 8 protects the inner surface of the door frame 6, and covers the comb tooth 96, the increase in a number of parts can be prevented. Therefore, the manufacturing process can be simplified and the mass productivity can be improved.

  Further, since the ribs 81 and 82 are provided on the surface of the door cover 8 on the side of the comb teeth 96, the aesthetics can be improved by preventing the ribs 81 and 82 from being exposed.

  Further, the holding of the protrusions 964 and 965 by the ribs 81 and 82 is completed by attaching the door cover 8 to the door panel assembly 7. Therefore, the operation for holding the projections 964 and 965 between the ribs 81 and 82 can be performed by covering the comb teeth 96 with the door cover 8.

  Moreover, since the said microwave oven is provided with the door 3, it can improve safety | security and can give a user a sense of security at the time of use.

  In the above embodiment, for example, the magnetron 50 that generates a microwave of 2.45 GHz is used. However, a radio wave generator that generates an ultrashort wave of 915 MHz may be used, for example.

  In the above-described embodiment, an electric heater may be installed in the casing 1 so that the oven cooking can be performed. Alternatively, a saturated steam generator or a superheated steam generator may be installed in the casing 1 You may enable it to heat the to-be-heated material 100 with superheated steam.

In the above embodiment, the comb teeth 96 side of the surface of the door cover 8, provided with a pair of ribs 81 and 82 that sandwich the protrusion 964, but the 5 protrusion 96 has been provided a pair of ribs for clamping the projections 964, A pair of clamping portions for clamping 965 may be provided. In other words, the door cover 8 may be provided with a plurality of structures in which a pair of sandwiching portions sandwich one projection 964 and one projection 965 facing the projection 965.

In the above embodiment, the projection 964 is provided on one side of the base 961 and the projection 965 is provided on the other side of the base 961. However, the projection 964 is provided on one side of the base 961. it is on the other side of the base portion 961 may not be provided with the 5 protrusion 96, or, although not a projection 964 provided on one side of the base 961, the projections on the other side of the base portion 961 it may be provided 96 5.

  In the above embodiment, the projection 964 is provided on one side of the base 961 and the projection 965 is provided on the other side of the base 961. However, the projection 964 is not provided on one side of the base 961. In addition, the protrusion 965 may not be provided on the other side portion of the base portion 961. That is, other comb teeth of the present invention include a comb tooth 196 shown in FIG. 7 and a comb tooth 296 shown in FIG.

  The comb teeth 196 include a base portion 1961 extending in a direction substantially parallel to the thickness direction of the inner glass 10, a connecting portion 1962 extending in a direction substantially perpendicular to the thickness direction of the inner glass 10, and the inner glass 10. And a distal end portion 1963 extending in a direction inclined with respect to the thickness direction. The connecting portion 1962 is provided with a through hole 1964. When such comb teeth 196 are used, protrusions that can be inserted into the through holes 1964 may be provided on the surface of the door cover 8 on the comb teeth 96 side. In addition, the said protrusion part is an example of a comb-tooth holding | maintenance part.

  The comb teeth 296 include a base portion 2961 extending in a direction substantially parallel to the thickness direction of the inner glass 10, a connecting portion 2962 extending in a direction substantially perpendicular to the thickness direction of the inner glass 10, and the inner glass 10. And a distal end portion 2963 extending in a direction inclined with respect to the thickness direction. The leading end 2963 is provided with a notch 2964. When such a comb tooth 296 is used, a protrusion that can be fitted into the notch 2964 may be provided on the surface of the door cover 8 on the comb tooth 96 side. In addition, the said protrusion part is an example of a comb-tooth holding | maintenance part.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, what combined the said embodiment and the above-mentioned modification suitably is good also as one Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Casing 2 Heater 5 Outer glass 6 Door frame 7 Door panel assembly 8 Door cover 9 Door panel 10 Inner glass 21 Opening part 50 Magnetron 96,196,296 Comb teeth 964,965 Protrusion 1964 Through-hole 2964 Notch

Claims (4)

The door body,
Comb teeth provided on the inner surface side of the door body to suppress leakage of radio waves,
A comb cover covering the comb teeth,
The comb tooth cover has a comb tooth holding portion for holding the comb teeth ,
The comb teeth have protrusions provided on at least one side,
The comb-teeth holding part is an extending part that extends toward the door body,
The door of the heating cooker, wherein the protrusion is fitted to the extending portion . In the door of the heating cooker according to claim 1,
The door of the heating cooker, wherein the comb cover also serves as a door cover for protecting the inner surface of the door body. In the door of the heating cooker according to claim 1 or 2,
The extending portion includes a pair of ribs,
The door of the heating cooker, wherein the protrusion is sandwiched between the pair of ribs. While having an opening on the front side, a heating chamber that accommodates an object to be heated through this opening,
A radio wave generator for generating radio waves for heating the object to be heated;
A heating cooker according to any one of claims 1 to 3, further comprising a heating cooker door that opens and closes the opening.

Images