JPS608596B2 - microwave oven door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of a microwave opening door that significantly reduces microwave leakage with a simple configuration.

The microwave oven door opens and closes the opening of the oven, which is the microwave heating chamber, for convenient loading and unloading of food.It is also constructed so that the inside of the opening can be seen through, and prevents microwaves from leaking through the transparent window. It is necessary to make sure that

Modern microwave oven doors have simpler structures and are thinner, thereby reducing costs.
An object of the present invention is to prevent microwave leakage from a microwave oven door with a simple structure.

The figure is an enlarged cross-section of the main part of a microwave oven door according to an embodiment of the present invention, and the entire periphery of the door has the same structure. According to this, the door 1 has a conductive punching plate 2 with many holes for seeing through, and a door front plate 3 and a door rear plate 4 made of translucent glass or synthetic resin on both sides. However, these members are mechanically integrated using the door frame 5. The punching plate 2 has a metal sealer plate 7 superimposed on its cylindrical edge, which is in contact with the oven front plate 6, and together with the sealer plate 7, a hole is opened inwardly along the inner periphery of the conductive door frame 5. 1 into the groove 5a. This sealer plate 7 fixes and supports the door rear plate 4 by fixing a mounting plate 8 having a cross-section of ``2''. It is fixed to the mounting member 8 via a rubber gasket 10 of a sealing material to prevent leakage to the plate 2 side.In addition to the first groove 5a described above, the door frame 5 has a door front plate 3 to sandwich it. A second groove 5b for attaching the dielectric, a choke chamber, and a third groove 5c for mounting the dielectric 11 are formed.

A radio wave absorbing material 12 facing the oven front plate 6 is attached to the outer wall of the door frame 5 to absorb microwaves that cannot be absorbed in the choke chamber. Furthermore, the first
A dividing wall 5' between the first groove 5a and the second groove 5b, which is the outer wall of the groove, protrudes inward for a long time to prevent microwave leakage to the door front plate 3 side. That is, the microwaves that have passed through the door rear plate 4 and leaked out pass through the gap between the punching plate 2 and the sealer plate 7 and reach the first groove 5a. It tries to leak to the door front plate 3 side, but the long protruding partition wall 5 is in the leak path.
′, most of the microwaves are reflected inward by the partition wall 5′, and leakage to the door front plate 3 side can be suppressed to a significantly low level. It should be noted that ``the longer the length of the partition wall 5' is, the better; however, according to experiments, if the overlapping dimension with the punching plate 2 is set to 2 ratio or more, the leakage to the door front plate 3 side can be reduced by 0.1%.
It can be suppressed to less than mW/. As described above, the present invention is particularly advantageous in that, according to the door structure shown in the figure, "the punching plate 2, the sealer plate 7, the door front plate 3, and the door rear plate 4 are iron-inserted into the door frame 5 and mechanically integrated. Since the structure is simple, the microwaves leaking from the gap between the peripheral edge of the punching plate 2 and the first groove 5a are absorbed by the first groove 5a.
Microwaves leaking between the oven front plate 6 and the sealer plate 7 are properly suppressed by the partition wall 5', which is the outer wall of the door frame 5. The radio wave absorber 12 fixed to the radio wave absorber 12 properly absorbs the radio wave.

Therefore, it is possible to provide a door for a microwave oven that has a simple structure, is thin, has low cost, significantly reduces leakage radio waves, and has improved safety.

[Brief explanation of the drawing]

The figure is an enlarged cross-sectional view of a main part of the structure of a microwave oven door according to an embodiment of the present invention, with its peripheral portion enlarged. Turtle: Door, 2: Punching board, 3: Door front board, 4: Door back board,
5: Door frame ~ 5': Partition wall between the first groove and the second groove (outside wall of the first groove), 5a: first groove, 5b third groove.

Claims (1)

[Claims] 1. In a microwave oven door formed by attaching a conductive punching plate to a conductive door frame, the door frame has a first groove into which the punching plate is inserted, and a second groove into which the door front plate is inserted. A door for a microwave oven, characterized in that the partition walls between the first groove and the second groove prevent microwave leakage via the periphery of the punching plate.