JPH08219468A - Door for microwave oven - Google Patents

Abstract

PURPOSE: To provide a door for a microwave oven in which the assembling tame can be shorted and the mixture of dust with a choke during the assembling operation can be prevented and which can be stably held in a microwave oven body. CONSTITUTION: The door 20 of a microwave oven is composed by mounting a framelike door case 2 and a framelike choke cover 3 across its peripheral side face at a door panel having a plurality of holes and a sight window 5 for sealing radio wave. A lacked part 17 is formed at the one corner of the cover 3 near the mounting position of a hinge 3, and split to choke covers 3a, 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven door. More specifically, the present invention relates to a microwave oven door capable of shortening the assembly work time and being stably held by the microwave oven main body.

[0002]

2. Description of the Related Art Conventionally, various microwave oven doors have been proposed for the purpose of reducing the number of parts and improving the workability of assembly. A conventional microwave oven door will be described with reference to the drawings. FIG. 8 is a partial front view of the back side of the conventional microwave oven when the door is opened horizontally.
FIG. 9 is a partial sectional view taken along the line BB of FIG. 8. As shown in FIGS. 8 and 9, the door panel 21 made of a conductive material has a transparent window 25 in which a radio wave is sealed in the center and a plurality of holes for observing the inside are provided, and an opening surface is formed. The choke portion 26 for sealing a radio wave having a door panel 21
Is formed along the outer peripheral edge of. A frame-shaped choke cover 23 is attached to the door panel 21 over the entire circumference so as to close the opening of the choke portion 26 from the rear surface of the door panel 21. The frame-shaped door case 22 is mounted so as to extend from the front surface of the door panel 21 to the peripheral side surface. The transparent rear glass 35 facing the heating chamber side is adhered to the outer peripheral portion of the see-through window 25 with a silicone adhesive or the like, while the windshield 36, which is the front surface of the door 40, is sandwiched in the central portion of the frame-shaped door case 22. ing.

Here, in a normal manufacturing process, the assembly of a microwave oven door is performed in another manufacturing process (for example, an outsourcing factory), and the assembled door is attached to the microwave oven main body to complete the microwave oven. Let Door panel 2
Pins 28 are fixed to the upper and lower two corners of 1, and hinges 29 are inserted into and fixed to the upper and lower two pins 28 from above and below. The other end of the fixed hinge 29 has an oven front plate 34.
It is fixed to the oven ceiling 31 and the bottom plate 32 of the microwave oven main body with screws 33 through the long holes 34a formed at the upper and lower sides of the. The hinge 29 rotatably supports the door about the pin 28.

Radio wave leakage is inspected for the completed microwave oven. As a result, the mounting hole of the hinge 29 is made long so that the operator can adjust the mounting position of the hinge 29 and repair it. The choke cover has a substantially same outer shape (rectangular frame shape) as that of the door panel in order to protect the inside of the choke portion of the door panel and improve the appearance, as disclosed in, for example, JP-A-5-26459. Made from. The choke cover is usually made of one member, but a choke cover made of four members is also disclosed in Japanese Utility Model Publication No. 1-9118.

[0005]

As described above, the door 40 having the above structure has the door panel 21 and the door case 2.
2 and the choke cover 23 are engaged and completed, and then attached to the microwave oven main body 50 via the hinge 29 to complete the microwave oven. However, when the hinge 29 is fixed to the microwave oven main body 50 in advance,
Since the choke cover 23 is already attached, there is a problem that the choke cover 23 hinders the hinge attachment work and the door panel 21 cannot be attached. In addition, when the choke cover 23 is attached after the door panel 21 is attached to the hinge 29, dust is mixed in the choke portion 26 or the sealer 24 formed on the outer peripheral end of the choke portion 26 is used during the work. There is a problem that it may be deformed and it is difficult to manufacture a reliable door.

The present invention has been made to solve the above problems, and can shorten the assembling work time and prevent dust from entering the choke portion during the assembling work, and stabilize the microwave oven main body. It is intended to provide a microwave oven door that is retained by.

[0007]

According to a first aspect of the present invention, there is provided a choke for sealing a radio wave, which has a see-through window provided with a plurality of holes for sealing a radio wave and for observing the inside, and having an opening surface. A metal door panel whose portion is formed along the outer peripheral edge, a frame-shaped door case mounted across the front side and the peripheral side surface of the door panel, and an opening surface of the choke portion from the rear surface of the door panel. A door of a microwave oven having a frame-shaped choke cover mounted so as to cover the peripheral side surface of the door panel so as to cover, and forming a cutout portion at a corner near the hinge attachment position of the choke cover. The choke cover is divided into two parts, and the choke cover near the divided hinge mounting position is rotatably attached to the microwave oven main body and the door panel. It is a door of a microwave oven, characterized in that the movement preventing portion for preventing movement of the fixing hinge is disposed.

According to a second aspect of the present invention, in the first aspect of the present invention, one of the choke covers divided into two is provided with a locking claw for engaging with the other choke cover on a dividing surface of the one choke cover. The door of the microwave oven is characterized in that a fitting hole into which the locking claw is fitted and locked is provided on the divided surface of the other choke cover.

According to a third aspect of the present invention, in the microwave oven according to the first or second aspect, the choke cover divided into two parts is made of the same material and is molded at the same time by the same mold. It's a door.

According to a fourth aspect of the present invention, there is provided a radio wave sealing choke portion having an opening surface and having a transparent window provided with a plurality of holes for sealing radio waves and for observing the inside along the outer peripheral edge. Formed of a metal door panel, a frame-shaped door case mounted across the front side and the peripheral side surface of the door panel, and the door panel so as to cover the opening surface of the choke portion from the rear surface of the door panel. A microwave oven door having a frame-shaped choke cover mounted across the peripheral side surface, wherein a notch and a bendable portion are formed at one corner near the hinge attachment position of the choke cover. A movable piece which is connected to the choke cover and is bent at the bendable portion, and the cutout portion is provided with a movable piece which can be separated and connected to the choke cover. A movement blocking portion for blocking the movement of the hinge fixed to the main body and the pin rotatably supported on the door panel is provided, and the notch surface of the movable piece engages with the choke cover. And a fitting hole into which the locking claw is fitted and locked is provided in the notch surface of the choke cover.

[0011]

According to the first aspect of the present invention, the choke cover is divided into two parts by forming a notch at one corner near the hinge mounting position of the choke cover, so that the hinge can be easily attached to the door. Further, a movement blocking portion for blocking the movement of the hinge fixed to the microwave oven main body and the pin rotatably attached to the door panel is arranged on the divided choke cover near the hinge mounting position. The door will not come off the hinge and fall off.

According to the second aspect of the present invention, the divided surface of one of the divided choke covers is provided with a locking claw for engaging with the other choke cover, and the divided surface of the other choke cover is provided. Since the fitting hole into which the locking claw is fitted and locked is provided, the choke covers are engaged with each other to form one component.

According to the third aspect of the present invention, since the choke covers divided into two parts are made of the same material and molded at the same time by the same die, both choke covers have the same dielectric characteristics. .

According to the fourth aspect of the present invention, a notch and a bendable portion are formed at one corner near the hinge mounting position of the choke cover to connect with the choke cover and bend at the bendable portion. Since the movable piece that can be separated and connected to the choke cover is provided by the notch, the work of attaching the hinge to the door becomes easy. Further, since the movable piece is provided with a movement preventing portion for preventing movement of the hinge fixed to the microwave oven main body and the pin rotatably supported on the door panel, the door is separated from the hinge. It will never fall out. Further, the cutout surface of the movable piece is provided with a locking claw for engaging with the choke cover, and the cutout surface of the choke cover is provided with a fitting hole into which the locking claw is fitted and locked. , The choke covers engage with each other and become one piece.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the back side of the door when one embodiment of the microwave oven door according to the present invention is opened sideways.
2 is a partial vertical sectional view showing the internal structure of the door of FIG. 1, and FIG. 2 is a partial sectional view taken along the line AA of FIG. As shown in FIG. 1 to FIG. 3, the door 20 according to the present invention, which opens and closes the front opening of the heating chamber of the microwave oven for loading and unloading the food, is attached to the microwave oven main body 30 via the hinge 9. It is attached. In this embodiment, only the lateral opening door will be described, but the same applies to the longitudinal opening door.

The door panel 1 has a transparent window 5 made of a metal plate in which the inside of the heating chamber can be observed and a plurality of holes are provided so as to prevent radio waves from leaking. And a metal choke portion 6 for standing up a radio wave seal. As shown in FIG. 4, the choke portion 6 includes comb teeth 6a and slits 6b of U-shaped conductors formed at appropriate intervals.
And to form an opening surface. These comb teeth 6
The microwaves are prevented from leaking by arranging a and the slits 6b evenly along the periphery of the door 20.

The U-shaped hinge 9 is the front plate 1 of the opening of the heating chamber.
It penetrates through the 0 long hole 10a and is welded and fixed to the back side of the side surface of the front plate 10. One end of the L-shaped pin mounting plate 7 is welded to the outer wall of the choke portion 6 near the upper and lower corners of the door panel 1. A rotatable pin 8 is caulked and fixed to the other end of the pin mounting plate 7. Then, the transparent rear glass 15 is adhered and bonded to the transparent window 5 from the rear surface of the door panel 1 by room temperature curable or thermosetting silicone rubber. This completes the preparation for assembling the door panel 1.

Next, the windshield 16 is inserted into and engaged with a sandwiching groove provided in the inner peripheral edge of the frame-shaped door case 2. The door case 2 is a resin molded product, and locking claws 2a are provided inside the outer peripheral edge thereof at appropriate intervals. In addition,
Although not shown here, the door case 2 has a hinge 9
A handle is integrally molded on the side opposite to the mounting side. The door case 2 assembled to the door panel 1 for which preparations have been completed is mounted across the front surface and the peripheral side surface of the door panel 1 and fixed by screws (not shown). Then, the frame-shaped choke cover 3 is mounted across the peripheral side surface of the door panel 1 so as to cover the opening surface of the choke portion 6 from the rear surface of the door panel 1, and as shown in FIG. The claw 2a and the fitting hole provided on the outer peripheral surface of the choke cover 3 are engaged with each other to be integrated.

As described above, the choke cover 3 is mounted over the peripheral side surface of the door panel 1 so as to cover the opening surface of the choke portion 6, but as shown in FIG. A missing portion 17 is formed so as to surround one corner of the square near the attachment position of the hinge 9. By forming the missing portion 17 in the choke cover 3, the choke cover 3 is divided into two, and the choke cover 3 is divided.
It is composed of a and a choke cover 3b.
FIG. 5 is an exploded partial perspective view showing an embodiment of a choke cover for a microwave oven door according to the present invention. As shown in FIG. 5, one choke cover 3a is a substantially frame-shaped molded product having an outer peripheral wall 3c, an inner wall surface 3d, and a missing portion 17, and a fitting hole 3e is appropriately formed in the outer peripheral wall 3c of the choke cover 3a. The fitting hole 3e is fitted and locked with the locking claw 2a of the door case 2. Further, the outer peripheral wall 3c around the missing portion 17 also has an outer peripheral wall 3f of the other choke cover 3b.
Fitting hole 3 for locking the locking claw 3g provided on the
e is provided.

Since the choke cover 3a almost covers the opening surface of the choke portion 6 except for the missing portion 17, deformation of the choke portion 6 caused by exposure of the opening surface of the choke portion 6 and mixing of dust. The harmful effect can be prevented. Therefore, the door panel 1 thus equipped with the choke cover 3a and the door case 2 can be handled as a door assembly, and can be manufactured without problems in manufacturing in an outsource factory, transportation, or assembling a microwave oven.

Next, the assembled door 20 is attached to the hinge 9 fixed to the microwave oven main body 30. The pin 8 attached to the door panel 1 via the pin attachment plate 7.
Is inserted into the hinge 9. In this state, the door 20 does not move downward, but it moves upward to move the hinge 9
Will fall out of. Therefore, the other choke cover 3b
Is fitted into the missing portion 17 of the choke cover 3a to close the remaining opening surface of the choke portion 6. The choke cover 3b is made of the same material as the choke cover 3a, and is molded at the same time by the same mold. Chalk cover 3b
5 has ribs 3h and 3i as shown in FIG. 5, and a concave pin escape 3j is provided at the end of the rib 3h so as not to come into contact with the pin 8. By mounting the choke cover 3b on the door panel 1, the rib 3h is arranged below the hinge 9. Therefore, even if the door 20 is moved upward, the rib 3h does not move to the hinge 9
It comes into contact with and acts as a stopper (movement blocking portion).
Therefore, the door 20 does not move and fall off, the door 20 is securely held by the hinge 9, and can be freely opened and closed with the pin 8 as the rotation axis.

Further, the choke covers 3a, 3b can be easily removed from the door panel 1 as a unit, and the locking claws 3g of the choke cover 3b and the choke cover 3 can be easily removed.
The engagement between the fitting hole 3e of a and the fitting hole 3e can be released and disassembled easily. Further, if the choke portions 6 are covered with the same colored choke covers 3a and 3b without any gap, the door 2
The appearance of 0 is also good.

FIG. 6 is a front view of the other side of the door of the microwave oven according to the present invention when the door is opened sideways, and FIG. 7 is a partial perspective view showing the choke cover of FIG. . As shown in FIG. 6 and FIG. 7, in this embodiment, a case where the choke cover is not a two-divided structure but one molded product will be described. That is, a thin flexible bendable portion 18 and a notch 19 are formed so as to surround one of the squares of the choke cover 13 near the hinge attachment position, and the bendable portion 18 is used as a bending axis. A movable piece 13a that can be separated and connected is provided. That is, the movable piece 13a is detachably coupled to the choke cover 13 and is integrally formed. The movable piece 13a has a rib (movement blocking portion) 13b for blocking the movement of the hinge 9 and a pin escape 13e for avoiding contact with the pin 8.

Further, locking claws 13c for engaging with the choke cover 13 are appropriately arranged on the outer peripheral surface of the movable piece 13a, and the locking claws 1 are provided in the notches 19 of the choke cover 13.
A fitting hole (not shown) is provided at a position corresponding to 3c. It should be noted that, as in the above-described embodiment, the choke cover 13
A fitting hole 13d for engaging with the locking claw 2a of the door case 2 is also appropriately provided on the outer peripheral wall of the.

With the movable piece 13a separated from the choke cover 13 and bent at the bendable portion 18, the choke cover 13 is attached to the door panel 1 to complete the door assembly.
Next, after inserting the pin 8 into the hinge 9 fixed to the microwave oven main body 30, the movable piece 13a is engaged with the choke cover 13. The movable piece 13a has a rib 13b, and by mounting the rib 13b on the door panel 1, the rib 13b is arranged below the hinge 9. As a result, even if the door 20 is moved upward, the rib 13b does not come into contact with the hinge 9 to serve as a stopper and the door does not move and fall off. That is, the rib 13b functions as a movement preventing member, the door 20 is securely held by the hinge 9, and is openable and closable around the pin 8 as a rotation axis.

In the above embodiment, the choke cover which is divided in the upper corner in the vicinity of the hinge mounting position and the choke cover which has the movable piece which can be separated and connected in a state of being connected without being divided are described. However, it may be a choke cover having a two-divided structure in which a lower corner near the hinge mounting position or an upper part and a lower part near the hinge mounting position are integrated.

[0027]

According to the first aspect of the present invention, the choke cover is divided into two parts by forming a notch at a corner near the hinge mounting position of the choke cover, so that the work time for attaching the hinge to the door is shortened. Therefore, dust is not mixed in the choke part during the transportation and installation work of the door assembly, and the comb teeth of the choke part are not deformed during handling, and a highly reliable door assembly is manufactured. You can Further, after the door assembly is attached to the hinge of the microwave oven main body, the choke cover near the divided hinge attachment position is attached to the choke portion, whereby the choke cover regulates the vertical movement of the door panel, The door assembly does not come off from the hinge and does not fall off, and the door is stably held by the microwave oven body and can be opened and closed.

According to the second aspect of the present invention, the divided surface of one of the divided choke covers is provided with a locking claw for engaging with the other choke cover, and the divided surface of the other choke cover is the above-mentioned. By providing the fitting hole in which the locking claw is fitted and locked, the choke covers are engaged with each other to form one component, and the choke cover can be handled as one choke cover as a service component without being lost.

According to the third aspect of the present invention, the two divided choke covers are simultaneously molded by using the same material and the same mold, so that both choke covers have the same dielectric characteristics. The radio wave sealing effect of the choke part is exhibited without the synchronization being deviated.

According to the fourth aspect of the present invention, a notch and a bendable portion are formed at a corner near the hinge mounting position of the choke cover to connect with the choke cover and to bend at the bendable portion. By providing the movable piece that can be separated and connected to the choke cover by the notch, an integrated choke cover that can be separated and connected can be obtained, which is advantageous for transportation, management, service, and the like.

[Brief description of drawings]

FIG. 1 is a front view showing a back side of a door of a microwave oven according to an embodiment of the present invention when the door is opened sideways.

FIG. 2 is a partial cross-sectional view showing the internal structure of the door of FIG.

3 is a partial cross-sectional view taken along the line AA of FIG.

4 is a partial perspective view of a choke portion of the microwave oven door of FIG. 2. FIG.

5 is a partially exploded perspective view of the choke cover of the microwave oven door of FIG. 2. FIG.

FIG. 6 is a front view of the back side of the door when the other embodiment of the microwave oven door according to the present invention is opened sideways.

FIG. 7 is a partial perspective view of a choke cover of the microwave oven door of FIG.

FIG. 8 is a partial front view showing the back side of the conventional microwave oven when the door is opened horizontally.

9 is a partial cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 door panel 2 door case 3 choke cover 5 see-through window 9 hinge 17 missing part 20 microwave door

Claims (4)

[Claims] 1. A metal for sealing a radio wave and having a see-through window having a plurality of holes for observing the inside thereof, and a choke portion for a radio wave seal having an opening surface formed along an outer peripheral edge. Made of a door panel, a frame-shaped door case mounted from the front surface of the door panel to the peripheral side surface, and extending from the rear surface of the door panel to the peripheral side surface of the door panel so as to cover the opening surface of the choke portion. A door of a microwave oven having a frame-shaped choke cover to be mounted according to the present invention, wherein the choke cover is divided into two parts by forming a cutout portion at one corner near the hinge mounting position of the choke cover. The choke cover near the divided hinge mounting position prevents movement of the hinge fixed to the microwave oven main body and the pin rotatably attached to the door panel. A door for a microwave oven, which is provided with a movement blocking portion for storing. 2. The choke cover divided into two is provided with a locking claw for engaging with the other choke cover on one of the choke covers, and on the other choke cover with the engaging pawl. The microwave oven door according to claim 1, further comprising: a fitting hole into which the locking claw is fitted and locked. 3. The door of a microwave oven according to claim 1, wherein the choke cover divided into two parts is made of the same material and is molded at the same time by the same mold. 4. A metal for sealing a radio wave and having a see-through window provided with a plurality of holes for observing the inside and having a choke portion for an electric wave seal having an opening surface formed along an outer peripheral edge. Made of a door panel, a frame-shaped door case mounted from the front surface of the door panel to the peripheral side surface, and from the rear surface of the door panel to the peripheral side surface of the door panel so as to cover the opening surface of the choke portion. A door of a microwave oven provided with a frame-shaped choke cover to be attached by forming a notch and a bendable portion at a corner near a hinge mounting position of the choke cover, A movable piece which is connected and bent at the bendable portion and which is detachably connectable to the choke cover by the cutout portion is provided, and the movable piece has a microwave oven main body and the door. A movement blocking portion for blocking the movement of the hinge fixed to the pin rotatably supported on the panel is arranged, and the notch surface of the movable piece is engaged with the choke cover for engagement. A door for a microwave oven, wherein a claw is provided, and a fitting hole into which the locking claw is fitted and locked is provided in a notch surface of the choke cover.