JPH0538799U - Microwave door - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a microwave oven door in which radio waves do not leak outside. [Structure] A door panel 2, a sealer plate 3, a punching metal 4, an inside screen 5, and an attaching means for attaching these are provided. Then, the mounting means is composed of a welding means for welding the door panel 2 and the sealer plate 3 and an adhesive means for bonding the punching metal 4, the inside screen 5 and the sealer plate 3 with the adhesive 11 to prevent radio wave leakage. To prevent. Also, this adhesive 1
The electromagnetic wave leakage is prevented by using No. 1 as an RTV adhesive containing silicon as a main component and containing iron powder made of a magnetic material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved microwave oven door.

[0002]

[Prior Art]

 BACKGROUND ART As a microwave oven door, for example, one shown in FIG. 5 has been conventionally known. This one comprises a door panel a, a sealer plate b, a punching metal c, and an inside screen d arranged on the rear side of the punching metal c, and the door panel a, the sealer plate b, and the punching metal c. After overlapping the ends of the inside screen d, the welded parts e ... e are formed by spot welding over a plurality of places, and the peripheral end part of the inside screen d is further overlapped on the overlapping part. The inside screen d and the sealer plate b are bonded to each other by a silicon-based RTV adhesive f. In the figure, g indicates a choke cover, h indicates a front cover, and i indicates a door case.

[0003]

[Problems to be solved by the device]

 However, in this case, since the punching metal c is attached by spot welding, during the welding, the punching metal c is affected by heat and causes deformation such as bending. As a result, there is a problem that a gap or the like is generated between the punching metal c and the inside screen d, or in the overlapping portion of the punching metal c and the sealer plate b, and the radio wave leaks to the outside.

The present invention has been proposed in view of the above circumstances, and an object thereof is to provide a microwave oven door in which radio waves do not leak to the outside.

[0005]

[Means for Solving the Problems]

 The present invention solves the above problems by providing a microwave oven door having the following features. The microwave oven door of the present invention comprises a door panel, a sealer plate, a punching metal, an inside screen arranged on the rear side of the punching metal, and an attaching means for attaching them. The attaching means includes a welding means and an adhering means. This welding means welds and attaches the door panel and the sealer plate. Then, the adhering means attaches the punching metal, the inside screen, and the sealer plate with an adhesive.

Further, as described in claim 2, a door panel, a sealer plate, a punching metal, an inside screen arranged on the rear side of the punching metal, and an attaching means for attaching these are provided. The attachment means includes an adhesive means for attaching the inside screen and the sealer plate over their entire circumferences, or attaching the punching metal, the inside screen and the sealer plate over their entire circumferences with an adhesive. This adhesive is composed of a silicon-based RTV adhesive containing a powdery substance made of a magnetic material. Then, the above problem is solved by providing a door of a microwave oven in which the adhesive can attenuate the radio waves entering the adhesive by the powdery material.

[0007]

[Action]

 In the present invention, the door panel and the sealer plate are welded together, and the punching metal and the inside screen are attached to the sealer plate with an adhesive, so that it is possible to prevent the punching metal from being thermally affected. As a result, the punching metal and the sealer plate b can be brought into surface contact with the punching metal and the inside screen, and a gap or the like can be prevented from being formed in the overlapping portion between them. Further, an adhesive agent for attaching the inside screen and the sealer plate or the punching metal, the inside screen and the sealer plate as described in claim 2 is a powdered material composed of a magnetic material in a silicon-based RTV adhesive agent. The radio wave that has penetrated into the adhesive is hit by the powder in the adhesive to be repelled, and the repelled radio wave is hit by other powder to be repelled. It will eventually disappear as it is repelled. As a result, the electric wave that has penetrated into the adhesive can be attenuated by the adhesive without going out of the adhesive.

[0008]

【Example】

 An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment of a microwave oven door of the present invention, and FIG. 2 is a perspective view of the entire microwave oven.

The microwave oven door 1 of the present invention includes a door panel 2, a sealer plate 3, a punching metal 4, an inside screen 5 disposed on the rear side of the punching metal 4 (X direction in the drawing), And a mounting means for mounting these.

Each of the door panel 2, the sealer plate 3, and the punching metal 4 has the same configuration as the conventional one, and will be briefly described below. The door panel 2 has a rectangular tubular shape as a whole, and is arranged around the door 1. Further, a sealer plate mounting portion 21 formed in a flat plate shape over the entire circumference is formed on the inner peripheral portion of the door panel 2 by being bent from the main body portion so as to project in the cylinder inward direction.

The sealer plate 3 is disposed on the rear side of the door panel 2 and has an attachment piece 31 on the inner peripheral portion. The mounting piece 31 has a front surface serving as a mounting surface which is mounted by being superposed on the sealer plate mounting portion 21 of the door panel 2, and a rear surface serving as a bonding surface which is superposed and bonded to the punching metal 4. Further, on the rear surface formed by the door panel 2 and the sealer plate 3, a choke cover 6 is provided so as to fit between the two, as in the conventional case.

The punching metal 4 has a plurality of small through holes, has a shape along the inner periphery of the sealer plate 3, and is inserted into the inner periphery of the sealer plate 3 from the rear side so that the punching metal 4 can be formed. The peripheral end portion is disposed so as to overlap the mounting piece 31.

Although the inside screen 5 is made of a plate-shaped glass in this embodiment, it can be changed as appropriate such as being made of a synthetic resin transparent body. The insert screen 5 has a shape slightly smaller than the punching metal 4 and is disposed by being inserted into the inner periphery of the sealer plate 3 from the rear side of the punching metal 4 similarly to the punching metal 4. As shown in FIG. 3, a gap 7 is formed over the entire circumference between the peripheral end portion 5a and the inner peripheral surface 3a of the sealer plate 3.

Further, in this embodiment, the windshield 8 is attached to the front side by the door case 9 so as to form the front surface of the door 1.

The attaching means includes a welding means and an adhering means. The welding means is for welding the door panel 2 and the sealer plate 3, and in this embodiment, the sealer plate mounting portion 21 of the door panel 2 and the mounting piece 31 of the sealer plate 3 are overlapped over the entire circumference. The welded portions 10 ... 10 are formed by spot welding at appropriate intervals, and the door panel 2 and the sealer plate 3 are attached.

On the other hand, the bonding means bonds the punching metal 4, the inside screen 5 and the sealer plate 3 with the adhesive 11. After the door panel 2 and the sealer plate 3 are attached by spot welding, the door panel 2 and the sealer plate 3 are arranged in a gap 7 between the peripheral end portion 5a of the inside screen 5 and the inner peripheral surface 3a of the sealer plate 3 and are bonded to each other. Here, the adhesive 11 used in this embodiment will be described.

The adhesive 11 is an RTV adhesive containing silicon as a main component, which is conventionally used for bonding the inside screen 5 made of glass, and iron powder made of a magnetic material. . By including iron powder made of a magnetic substance in the RTV adhesive, when the radio wave 12 emitted from the range enters the adhesive 11 as shown in FIG. One iron powder 11a is hit and repelled, and then the repelled radio wave 12 is hit and repelled by another iron powder 11a. Then, this is repeated, and the invading radio wave 12 disappears without coming out of the door 1 from the adhesive 11. In this embodiment, iron powder is contained, but it is not limited to iron powder, and any powdery substance made of a magnetic material may be used and can be changed appropriately.

As described above, by attaching the punching metal 4 and the inside screen 5 to the sealer plate 3 with the adhesive 11, it is possible to avoid heat influence when welding the punching metal 4 as in the conventional case. It is possible to prevent the peripheral edge of the punching metal 4 from bending. As a result, the peripheral edge of the punching metal 4 and the mounting piece 31 of the sealer plate 3 and the peripheral edge of the punching metal 4 and the peripheral edge 5a of the inside screen 5 can be mounted in surface contact. , It is possible to prevent the formation of a gap in the overlapping portion. Therefore, it is possible to reliably prevent the electric wave leakage to the outside of the door.

When the oven is a so-called oven oven that also serves as an oven, it is used when the surfaces of the portions 22 and 32 forming the rear surface of the door of the door panel 2 and the sealer plate 3 are enamel finished. It is preferable from the above, but if the enamel finish is applied, then the welding will not work properly. Therefore, even if the door panel 2 and the sealer plate 3 are enamel-finished as in the conventional case and then these and the punching metal 4 are attached by spot welding, they cannot be attached. On the other hand, when the three members are previously attached by spot welding or integrally formed and then the three members are hollow-finished, the punching metal 4 is also hollow-finished. As a result, the through holes of the punching metal 4 become small due to the enamel finish, and the aperture ratio becomes low. Further, in this case, if the through hole of the punching metal 4 is made large in advance in consideration of the enamel finish after that, radio wave leakage will occur. Therefore, as in the present invention, the door panel 2 and the sealer plate 3 are heat-welded, and the punching metal 4 and the inside screen 5 are attached to the sealer plate 3 with the adhesive 11, so that the punching metal 4 is enameled. It is possible to easily obtain a microwave oven door with a enamel finish on the rear surface.

On the other hand, by using the adhesive 11 containing the iron powder made of a magnetic material, it is possible to prevent the radio wave 12 from passing through the adhesive 11. As a result, it is possible to prevent the electric wave 12 from leaking as long as the peripheral edge portion 5a of the inside screen 5 and the inner periphery of the sealer plate 3 are brought into close contact with each other by the adhesive agent 11. It is also possible to deal with the case where welding causes a gap in the overlapped portion.

In this embodiment, the door panel 2 and the sealer plate 3 are welded to each other as described above, and the punching metal 4, the inside screen 5 and the sealer plate 3 are bonded to each other by a powder containing a magnetic substance. Although the adhesive 11 is used for attachment, the present invention is not limited to this mode. For example, the door panel 2 and the sealer plate 3 may be welded together, and the punching metal 4, the inside screen 5 and the sealer plate 3 may be attached by a conventional RTV adhesive. Alternatively, the door panel 2, the sealer plate 3 and the punching metal 4 may be welded together as in the conventional case. Also, if the inside screen 5 and the sealer plate 3 are attached over the entire circumference by the adhesive 11 containing the powdery substance of the magnetic material of the present invention, it is possible to prevent the electric wave leakage. It can be changed appropriately.

When the inside screen 5 is formed of a synthetic resin film and used, the inside screen 5 is formed larger than the punching metal 4 as shown in FIG. Alternatively, the peripheral edge 5 of the inside screen 5 protruding from the peripheral edge of the punching metal 4 and the mounting piece 31 of the sealer plate 3 may be bonded with the adhesive 13 in advance. Also by doing so, the punching metal 4 and the sealer plate 3 can be brought into surface contact with each other, and the electric wave leakage can be prevented. The adhesive 13 in this case does not have to be an RTV adhesive, but may be an adhesive suitable for fixing a synthetic resin and a metal.

[0023]

[Effect of the device]

 As described above, in the present invention, since the punching metal and the inside screen are attached to the sealer plate by the adhesive, it is possible to prevent the punching metal from being affected by heat. As a result, the punching metal and the sealer plate can be brought into surface contact with the punching metal and the inside screen, and a gap or the like can be prevented from being formed in the overlapping portion between them. Therefore, it is possible to reliably prevent leakage of radio waves from the overlapping portion. Further, an adhesive agent for attaching the inside screen and the sealer plate or the punching metal, the inside screen and the sealer plate as described in claim 2 is a powdered material composed of a magnetic material in a silicon-based RTV adhesive agent. Since it is composed of a substance containing, the electric wave that has penetrated into the adhesive is repeatedly repelled by a powdery substance inside the adhesive, and the electric wave that has penetrated into the adhesive is attenuated by the adhesive without going out of the adhesive. I can do it. Therefore, even when a gap occurs in the overlapping portion, the adhesive can reliably prevent the leakage of radio waves from the overlapping portion. As described above, the present invention can provide a microwave oven door in which radio waves do not leak outside.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of an entire microwave oven equipped with a door of the present invention.

FIG. 3 is an explanatory diagram of the movement of radio waves in the adhesive.

FIG. 4 is a partially enlarged cross-sectional view of another embodiment.

FIG. 5 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Door 2 Door panel 3 Sealer plate 4 Punching metal 5 Inside screen 7 Gap 11 Adhesive

Claims (2)

[Scope of utility model registration request] 1. A door panel, a sealer plate, a punching metal, an inside screen arranged on the rear side of the punching metal, and a mounting means for mounting these, the mounting means being a welding means and a bonding means. The welding means is for welding and attaching the door panel and the sealer plate, and the adhesive means is for attaching the punching metal, the inside screen, and the sealer plate with an adhesive. Microwave door. 2. A door panel, a sealer plate, a punching metal, an inside screen arranged on the rear side of the punching metal, and mounting means for mounting these, the mounting means comprising an inside screen and a sealer plate. With an adhesive for attaching the punching metal, the inside screen, and the sealer plate over their entire circumferences with an adhesive, and this adhesive is magnetic to the silicon-based RTV adhesive. A door for a microwave oven, characterized in that it is made up of a body containing a powdery substance, and that the powdery substance allows the adhesive to attenuate the radio waves entering the adhesive.