EP2796792B1 - High-frequency heating device - Google Patents
High-frequency heating device Download PDFInfo
- Publication number
- EP2796792B1 EP2796792B1 EP12859822.4A EP12859822A EP2796792B1 EP 2796792 B1 EP2796792 B1 EP 2796792B1 EP 12859822 A EP12859822 A EP 12859822A EP 2796792 B1 EP2796792 B1 EP 2796792B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- front plate
- pawls
- heating device
- frequency heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims description 44
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 1
Images
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
- H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
Definitions
- the present invention relates to a structure of a cabinet of a high-frequency heating device such as a microwave oven.
- the high-frequency heating device such as the microwave oven usually includes a heating chamber, a front plate of a peripheral edge of an opening part of the heating chamber, a rear plate in a rear part of the heating chamber, a cover which covers an upper surface and right and left side surfaces of the heating chamber and a bottom plate.
- the front plate and the rear plate are allowed to stand upright on the bottom plate.
- the cover is fixed to the front plate and the rear plate.
- a pawl of the cover formed by folding back a front edge of one metal plate is attached by sandwiching a flange of the front plate formed by bending inside an outer peripheral edge of the front plate, so that the cover is engaged with the front plate.
- a flange formed by bending a rear edge of the cover inside is screwed to the rear plate.
- US 5 938 967 discloses a high-frequency heating device comprising: a heating chamber which has an opening part and in which an object to be heated is placed; a front plate arranged in a peripheral edge of the opening part of the heating chamber; a cover which covers an upper surface and right and left side surfaces of the heating chamber; an upper flange formed by bending an upper part of an outer peripheral edge of the front plate; side flanges formed by bending right and left side parts of the outer peripheral edge of the front plate; and pawls (46) formed in right and left side parts of a front surface of the cover; wherein the pawls sandwich and engage the side flanges.
- Patent Document 1 JP-U-S56-136511
- the high-frequency heating device to which the cover is attached by the above-described attaching method has a structure that a front surface of the cover has flexibility in a vertical direction due to a clearance provided between all the edge of the cover and the flange of the front plate. Accordingly, a problem arises that when the high-frequency heating device is carried, the front surface of the cover moves in the vertical direction to change the clearance between the front plate and the cover.
- the flange of the front plate since the flange of the front plate has only strength of the thickness of the plate, the flange is liable to be deformed. A problem arises that when the cover is attached to the front plate under a state that the flange of the front plate is deformed, the cover is obliquely attached thereto. Further, a problem arises that when a rib is provided in a bottom plate to suppress a vertical movement by a flange formed by bending an outer peripheral edge of a cover inside, since the flange provided in the cover has only strength of the thickness of the plate, the strength is low to deform the cover when a load is applied thereto.
- An object of the present invention is to provide a high-frequency heating device which can suppress a vertical movement of a front surface of a cover attached to a front plate attached to a peripheral edge of an opening part of a heating chamber.
- the present invention provides a high-frequency heating device comprising: a heating chamber which has an opening part and in which an object to be heated is placed; a front plate arranged in a peripheral edge of the opening part of the heating chamber; a cover which covers an upper surface and right and left side surfaces of the heating chamber; an upper flange formed by bending an upper part of an outer peripheral edge of the front plate ; side flanges formed by bending right and left side parts of the outer peripheral edge of the front plate; pawls formed in right and left side parts of a front surface of the cover; J and engaging bodies are formed in the side flanges; wherein the pawls are cut out so as to meet shapes of the engaging bodies, the pawls sandwich and engage the side flanges, and the engaging bodies are arranged on an upper side of the pawls to suppress a vertical movement of the cover.
- the pawls provided in the cover sandwich flanges of the front plate under a state that the flange of the front plate is deformed, the pawls of the cover are fixed by the engaging bodies provided in the front plate.
- the flange of the front plate is remedied so that the cover can be prevented from being obliquely attached to the front plate.
- the pawls provided in the cover insufficiently sandwich the flanges of the front plate, the pawls of the cover are fixed by the engaging bodies provided in the front plate.
- the flanges of the front plate are remedied so that the cover may be prevented from being obliquely attached to the front plate.
- an end face of the engaging body is formed to be round.
- the high-frequency heating device which can prevent the front surface of the cover from moving in the vertical direction, which can prevent the cover from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate, and which is high in its quality of an external appearance.
- a first invention provides a high-frequency heating device including: a heating chamber in which an object to be heated is placed; a front plate arranged in a peripheral edge of an opening part of the heating chamber; and a cover which covers the heating chamber and is attached to the front plate, wherein the front plate includes engaging bodies which suppress the vertical movement of the cover, and wherein pawls of the cover are partly cut out so as to meet the engaging bodies of the front plate so that the pawls of the cover are fixed in a vertical direction by the engaging bodies. Consequently, it is possible to prevent the cover from moving in the vertical direction, and also prevent the cover from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate
- a second invention provides the high-frequency heating device according to the first invention, wherein an end face of the engaging body is formed to be round. Consequently, the resistance during the sandwiching is reduced. As a result, the attaching operation of the cover becomes easy, whereby work effectiveness can be improved.
- Fig. 1 is an exploded perspective view of a microwave oven (a high-frequency heating device) in a first embodiment of the present invention.
- Fig. 2 is a perspective view under a state that a door is detached in the microwave oven of the first embodiment.
- Fig. 3 is a side view of a cover 1 of the microwave oven of the first embodiment.
- Fig. 4 is a side view of a front plate 4 of the microwave oven of the first embodiment.
- a cabinet 2 of the microwave oven (the high-frequency heating device) of the first embodiment includes a front plate 4 attached to a peripheral edge of an opening part of a heating chamber 3, a rear plate 5 provided in a rear part of the heating chamber 3, a bottom plate 6 and a cover 1 which covers an upper surface and right and left side surfaces of the heating chamber 3.
- An outer peripheral edge of the front plate 4 is bent inside.
- An upper flange 7 is formed in an upper part of the front plate 4.
- a lower flange 8 is formed.
- side flanges 9 are formed.
- an upper flange 7 is formed in an upper part
- a lower flange 8 is formed in a lower part
- side flanges 9 are formed in right and left side parts like the front plate 4.
- the cover 1 is formed by bending one flat plate to have a substantially U-shape. Further, in an upper part of a front side of the cover 1, an upper flange holding pawl 10 which sandwiches the upper flange 7 of the front plate 4 is formed as shown in Fig. 2 and Fig. 3 . Further, in right and left side parts of a front surface of the cover 1, side flange holding pawls 11 which sandwich the side flanges 9 of the front plate 4 are formed as shown in Fig 2 and Fig. 3 .
- engaging bodies 30 which fix the pawls 11 of the cover 1 in the vertical direction are formed.
- the pawls 11 of the cover 1 have forms cut out so as to meet the shapes of the engaging bodies 30.
- Fig. 1 An assembly of the cabinet 2 will be described below by referring to Fig. 1 .
- the lower flanges 8 of the front plate 4 and the rear plate 5 fixed to the heating chamber 3 are fixed to the bottom plate 6 by screws 20 to allow the front plate 4 and the rear plate 5 to stand upright.
- the cover 1 formed and molded substantially in the shape of the character U is prepared and the cover 1 is slid forward by moving lower bent bodies 12 of the cover 1 along a lower surface of the bottom plate 6.
- the upper flange 7 of the front plate 4 is sandwiched by and engages the pawl 10 formed in the upper part of the front side of the cover 1.
- the side flanges 9 of the front plate 4 are sandwiched by and engage the pawls 11 formed in the right and left side parts of the front surface of the cover 1.
- the engaging bodies 30 formed in the side flanges 9 in the right and left side parts of the front plate 4 are arranged on an upper side of the pawls 11, the engaging bodies 30 suppress the vertical movement of the pawls 11 of the cover 1.
- an upper bent body 13 and side bent bodies 14 of the cover 1 shown in Fig. 1 abut on the rear plate 5
- the cover 1 is fixed to the rear plate 5 by screws 20. In such a way, the cabinet 2 is completed.
- an end face of an engaging body 30 is formed to be round so as to improve workability.
- Other structures of a cabinet 2 are the same as those of the first embodiment.
- the end face of the engaging body 30 of the present embodiment is formed to be round, when a cover 1 is slid forward by moving lower bent bodies 12 of the cover 1 along a lower surface of a bottom plate 6, a resistance due to a contact of a pawl 11 of the cover 1 with the engaging body 30 can be reduced. As a result, since an attaching operation of the cover 1 is easy, work effectiveness can be improved.
- the front surface of the cover can be prevented from moving in the vertical direction and the cover can be prevented from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate.
- the high-frequency heating device is useful as a high-frequency heating device high in its quality of an external appearance.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Ovens (AREA)
Description
- The present invention relates to a structure of a cabinet of a high-frequency heating device such as a microwave oven.
- As shown in
Fig. 8 , the high-frequency heating device such as the microwave oven usually includes a heating chamber, a front plate of a peripheral edge of an opening part of the heating chamber, a rear plate in a rear part of the heating chamber, a cover which covers an upper surface and right and left side surfaces of the heating chamber and a bottom plate. The front plate and the rear plate are allowed to stand upright on the bottom plate. Further, the cover is fixed to the front plate and the rear plate. When the cover is fixed to the front plate and the rear plate, a pawl of the cover formed by folding back a front edge of one metal plate is attached by sandwiching a flange of the front plate formed by bending inside an outer peripheral edge of the front plate, so that the cover is engaged with the front plate. A flange formed by bending a rear edge of the cover inside is screwed to the rear plate. - As an attaching method of a cover, there is another method in which, for instance, a screwing operation is saved when the cover is fixed to a rear plate to fit a pawl of the cover to an engaging piece provided in the rear plate, so that the cover is fixed (for instance, see Patent Document 1).
- Further, in the attaching method of the cover, when outer peripheral edges of a front plate and a rear plate have curved forms, pawls of a front edge and a rear edge of the cover and the form of the cover are changed so as to meet a structure of a cabinet having the curved surfaces (see Patent Document 2).
-
US 5 938 967 discloses a high-frequency heating device comprising: a heating chamber which has an opening part and in which an object to be heated is placed; a front plate arranged in a peripheral edge of the opening part of the heating chamber; a cover which covers an upper surface and right and left side surfaces of the heating chamber; an upper flange formed by bending an upper part of an outer peripheral edge of the front plate; side flanges formed by bending right and left side parts of the outer peripheral edge of the front plate; and pawls (46) formed in right and left side parts of a front surface of the cover; wherein the pawls sandwich and engage the side flanges. - Patent Document 1:
JP-U-S56-136511 - However, in the above-described attaching method of the cover of the usual high-frequency heating device, the pawl of the cover provided in the front edge of the cover is engaged with the flange of the front plate and the rear plate is screwed to fix the cover. Accordingly, the high-frequency heating device to which the cover is attached by the above-described attaching method has a structure that a front surface of the cover has flexibility in a vertical direction due to a clearance provided between all the edge of the cover and the flange of the front plate. Accordingly, a problem arises that when the high-frequency heating device is carried, the front surface of the cover moves in the vertical direction to change the clearance between the front plate and the cover.
- Further, since the flange of the front plate has only strength of the thickness of the plate, the flange is liable to be deformed. A problem arises that when the cover is attached to the front plate under a state that the flange of the front plate is deformed, the cover is obliquely attached thereto. Further, a problem arises that when a rib is provided in a bottom plate to suppress a vertical movement by a flange formed by bending an outer peripheral edge of a cover inside, since the flange provided in the cover has only strength of the thickness of the plate, the strength is low to deform the cover when a load is applied thereto.
- An object of the present invention is to provide a high-frequency heating device which can suppress a vertical movement of a front surface of a cover attached to a front plate attached to a peripheral edge of an opening part of a heating chamber.
- The present invention provides a high-frequency heating device comprising: a heating chamber which has an opening part and in which an object to be heated is placed; a front plate arranged in a peripheral edge of the opening part of the heating chamber; a cover which covers an upper surface and right and left side surfaces of the heating chamber; an upper flange formed by bending an upper part of an outer peripheral edge of the front plate ; side flanges formed by bending right and left side parts of the outer peripheral edge of the front plate; pawls formed in right and left side parts of a front surface of the cover; J
and engaging bodies are formed in the side flanges; wherein the pawls are cut out so as to meet shapes of the engaging bodies, the pawls sandwich and engage the side flanges, and the engaging bodies are arranged on an upper side of the pawls to suppress a vertical movement of the cover. - Thus, when a user carries the high-frequency heating device, even if the user applies a force in a vertical direction thereto, the pawls of the cover are fixed by the engaging bodies provided in the front plate, so that the vertical movement of the cover can be prevented and the change of a clearance between the front plate and the cover can be prevented.
- Further, when the pawls provided in the cover sandwich flanges of the front plate under a state that the flange of the front plate is deformed, the pawls of the cover are fixed by the engaging bodies provided in the front plate. Thus, the flange of the front plate is remedied so that the cover can be prevented from being obliquely attached to the front plate.
- Further, when the pawls provided in the cover insufficiently sandwich the flanges of the front plate, the pawls of the cover are fixed by the engaging bodies provided in the front plate. Thus, the flanges of the front plate are remedied so that the cover may be prevented from being obliquely attached to the front plate.
- In the above-described high-frequency heating device, an end face of the engaging body is formed to be round. When the pawls provided in the cover sandwich the flanges of the front plate, since the end faces of the engaging bodies provided in the front plate are formed to be round, a resistance during the sandwiching is reduced. As a result, since an attaching operation of the cover is easy, work effectiveness can be improved.
- According to the present invention, it is possible to provide the high-frequency heating device which can prevent the front surface of the cover from moving in the vertical direction, which can prevent the cover from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate, and which is high in its quality of an external appearance.
-
-
Fig. 1 is an exploded perspective view of a microwave oven in a first embodiment of the present invention. -
Fig. 2 is a perspective view under a state that a door is detached in the microwave oven of the first embodiment. -
Fig. 3 is a side view of a cover of the microwave oven of the first embodiment. -
Fig. 4 is a side view of a front plate of the microwave oven of the first embodiment. -
Fig. 5 is a side view showing a state that the cover of the microwave oven of the first embodiment is attached to the front plate. -
Fig. 6 is a sectional view taken along a line A-A ofFig. 5 . -
Fig. 7 is an enlarged view of an engaging body of a microwave oven of a second embodiment. -
Fig. 8 is a perspective view under a state that a door is detached in a usual microwave oven. - A first invention provides a high-frequency heating device including: a heating chamber in which an object to be heated is placed; a front plate arranged in a peripheral edge of an opening part of the heating chamber; and a cover which covers the heating chamber and is attached to the front plate, wherein the front plate includes engaging bodies which suppress the vertical movement of the cover, and wherein pawls of the cover are partly cut out so as to meet the engaging bodies of the front plate so that the pawls of the cover are fixed in a vertical direction by the engaging bodies. Consequently, it is possible to prevent the cover from moving in the vertical direction, and also prevent the cover from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate
- A second invention provides the high-frequency heating device according to the first invention, wherein an end face of the engaging body is formed to be round. Consequently, the resistance during the sandwiching is reduced. As a result, the attaching operation of the cover becomes easy, whereby work effectiveness can be improved.
- Now, an embodiment of the present invention will be described below by referring to the drawings. The present invention is not limited by the embodiment.
-
Fig. 1 is an exploded perspective view of a microwave oven (a high-frequency heating device) in a first embodiment of the present invention.Fig. 2 is a perspective view under a state that a door is detached in the microwave oven of the first embodiment.Fig. 3 is a side view of acover 1 of the microwave oven of the first embodiment.Fig. 4 is a side view of afront plate 4 of the microwave oven of the first embodiment. - As shown in
Fig. 1 andFig. 2 , acabinet 2 of the microwave oven (the high-frequency heating device) of the first embodiment includes afront plate 4 attached to a peripheral edge of an opening part of aheating chamber 3, arear plate 5 provided in a rear part of theheating chamber 3, abottom plate 6 and acover 1 which covers an upper surface and right and left side surfaces of theheating chamber 3. An outer peripheral edge of thefront plate 4 is bent inside. An upper flange 7 is formed in an upper part of thefront plate 4. In a lower part, alower flange 8 is formed. In right and left side parts,side flanges 9 are formed. Further, also in therear plate 5, an upper flange 7 is formed in an upper part, alower flange 8 is formed in a lower part, andside flanges 9 are formed in right and left side parts like thefront plate 4. - As shown in
Fig. 2 , thecover 1 is formed by bending one flat plate to have a substantially U-shape. Further, in an upper part of a front side of thecover 1, an upperflange holding pawl 10 which sandwiches the upper flange 7 of thefront plate 4 is formed as shown inFig. 2 andFig. 3 . Further, in right and left side parts of a front surface of thecover 1, sideflange holding pawls 11 which sandwich theside flanges 9 of thefront plate 4 are formed as shown inFig 2 andFig. 3 . - In the right and left side parts of the
front plate 4, as shown inFig. 4 , engagingbodies 30 which fix thepawls 11 of thecover 1 in the vertical direction are formed. Thepawls 11 of thecover 1 have forms cut out so as to meet the shapes of the engagingbodies 30. - Now, an assembly of the
cabinet 2 will be described below by referring toFig. 1 . Thelower flanges 8 of thefront plate 4 and therear plate 5 fixed to theheating chamber 3 are fixed to thebottom plate 6 byscrews 20 to allow thefront plate 4 and therear plate 5 to stand upright. Then, thecover 1 formed and molded substantially in the shape of the character U is prepared and thecover 1 is slid forward by moving lowerbent bodies 12 of thecover 1 along a lower surface of thebottom plate 6. - When the
cover 1 reaches the most forward part, the upper flange 7 of thefront plate 4 is sandwiched by and engages thepawl 10 formed in the upper part of the front side of thecover 1. At the same time, theside flanges 9 of thefront plate 4 are sandwiched by and engage thepawls 11 formed in the right and left side parts of the front surface of thecover 1. At this time, as shown inFig. 5 and Fig. 6 , since the engagingbodies 30 formed in theside flanges 9 in the right and left side parts of thefront plate 4 are arranged on an upper side of thepawls 11, the engagingbodies 30 suppress the vertical movement of thepawls 11 of thecover 1. After that, since an upperbent body 13 and side bentbodies 14 of thecover 1 shown inFig. 1 abut on therear plate 5, thecover 1 is fixed to therear plate 5 byscrews 20. In such a way, thecabinet 2 is completed. - In this embodiment, as shown in
Fig. 7 , an end face of an engagingbody 30 is formed to be round so as to improve workability. Other structures of acabinet 2 are the same as those of the first embodiment. - Since the end face of the engaging
body 30 of the present embodiment is formed to be round, when acover 1 is slid forward by moving lowerbent bodies 12 of thecover 1 along a lower surface of abottom plate 6, a resistance due to a contact of apawl 11 of thecover 1 with the engagingbody 30 can be reduced. As a result, since an attaching operation of thecover 1 is easy, work effectiveness can be improved. - In the high-frequency heating device according to the present invention, the front surface of the cover can be prevented from moving in the vertical direction and the cover can be prevented from being obliquely attached to the front plate due to a deformation or an insufficient sandwiching of the flange of the front plate. Thus, the high-frequency heating device is useful as a high-frequency heating device high in its quality of an external appearance.
-
- 1:
- Cover
- 2:
- Cabinet
- 3:
- Heating Chamber
- 4:
- Front Plate
- 5:
- Rear Plate
- 6:
- Bottom Plate
- 7:
- Upper Flange
- 8:
- Lower Flange
- 9:
- Side Flange
- 10:
- Upper Flange Holding Pawl
- 11:
- Side Flange Holding Pawl
- 12:
- Lower Bent Body
- 13:
- Upper Bent Body
- 14:
- Side Bent Body
- 20:
- Screw
- 30:
- Engaging Body
Claims (2)
- A high-frequency heating device comprising:a heating chamber (3) which has an opening part and in which an object to be heated is placed;a front plate (4) arranged in a peripheral edge of the opening part of the heating chamber (3);a cover (1) which covers an upper surface and right and left side surfaces of the heating chamber (3);an upper flange (7) formed by bending an upper part of an outer peripheral edge of the front plate (4);side flanges (9) formed by bending right and left side parts of the outer peripheral edge of the front plate (4); andpawls (11) formed in right and left side parts of a front surface of the cover (1);wherein the pawls (11) sandwich and engage the side flanges (9),the high-frequency heating device being characterized in that:engaging bodies (30) are formed in the side flanges (9),the pawls (11) are cut out so as to meet shapes of the engaging bodies, andthe engaging bodies are arranged on an upper side of the pawls to suppress a vertical movement of the cover (1).
- The high-frequency heating device according to claim 1,
wherein an end face of the engaging body is formed to be round.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011278114A JP5938548B2 (en) | 2011-12-20 | 2011-12-20 | High frequency heating device |
PCT/JP2012/008140 WO2013094202A1 (en) | 2011-12-20 | 2012-12-19 | High-frequency heating device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2796792A1 EP2796792A1 (en) | 2014-10-29 |
EP2796792A4 EP2796792A4 (en) | 2015-06-03 |
EP2796792B1 true EP2796792B1 (en) | 2016-12-07 |
Family
ID=48668120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12859822.4A Active EP2796792B1 (en) | 2011-12-20 | 2012-12-19 | High-frequency heating device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2796792B1 (en) |
JP (1) | JP5938548B2 (en) |
WO (1) | WO2013094202A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56136511U (en) | 1980-03-19 | 1981-10-16 | ||
JPS6141510U (en) * | 1984-12-07 | 1986-03-17 | 東芝テック株式会社 | oven toaster |
JPS62102035A (en) * | 1985-10-28 | 1987-05-12 | Matsushita Electric Ind Co Ltd | High frequency heating device |
JP2916441B2 (en) * | 1996-04-23 | 1999-07-05 | 三星電子株式会社 | microwave |
JP3619768B2 (en) * | 2000-10-26 | 2005-02-16 | シャープ株式会社 | Cooker |
-
2011
- 2011-12-20 JP JP2011278114A patent/JP5938548B2/en active Active
-
2012
- 2012-12-19 WO PCT/JP2012/008140 patent/WO2013094202A1/en active Application Filing
- 2012-12-19 EP EP12859822.4A patent/EP2796792B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
JP2013130310A (en) | 2013-07-04 |
WO2013094202A1 (en) | 2013-06-27 |
JP5938548B2 (en) | 2016-06-22 |
EP2796792A4 (en) | 2015-06-03 |
EP2796792A1 (en) | 2014-10-29 |
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