JPS6359240B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a door device for a high frequency heating device such as a microwave oven.

Conventional Structure and Problems As shown in FIG. 1, a door inner frame 2 is welded to a door body 1. The resin cover 3 is supported on one side by the wall of the door body 1 and on the other side by the door front plate 4,
Tighten the door front plate 4 and door inner frame 2 with screws 5. The door front plate 4 and the door inner frame 2 constitute a part of the yoke structure, and require sufficient adhesion to prevent the screen from fogging due to steam leakage. For this reason, generally about 10 to 12 screws 5 are used to tighten the door front plate 4 and the door inner frame 2.
When replacing parts due to scratches etc. on the resin cover 3,
The screws 5 must be removed and the door front plate 2 must be removed, and the number of man-hours required for installation and removal poses a problem in terms of productivity and serviceability.

Therefore, door configurations without tightening screws began to be created. An example is shown in FIG. A door front plate 4 is welded to the door body 1. Resin cover 3
One side is hooked on the support plate 1a of the door body 1 with a claw 3a, and the other side is hooked on the slit plate 6 with a claw 3b. By using the above configuration, the assembly work was greatly improved compared to the screw-tightened door configuration.
However, there are two problems. One method is to hook the claws 3a and 3b of the resin cover 3 onto the slit plate 6. As is well known, the slit plate 6 is located at an important position on the radio wave seal. It is clear from experiments that the amount of radio wave leakage varies greatly depending on the mounting position of the slit plate 6. Therefore, when the resin cover 5 is hooked onto the slit plate 6, the slit plate 6 may be formed and the amount of radio wave leakage may increase.

Another factor is service. As shown in FIG. 2, the claws 3a and 3b of the resin cover 3 are attached to the outside for both the hooking of the slit plate 6 and the hooking of the support plate 1a. Therefore, the resin cover 3
When replacing the resin cover 3, apply force in the direction of arrow F.
The claws 3a, 3b are engaged in the direction of the broken line arrow F', and do not come off until the claws 3a, 3b are broken or the slit plate 6 and the support plate 1a are deformed. Claws 3a, 3b
If the resin cover 3 is broken, the resin cover 3 cannot be reused, and if the slit plate 6 and the support plate 1a of the door body 1 are deformed, there is a risk of adversely affecting radio wave leakage.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to improve the productivity and serviceability of door devices for high-frequency heating devices.

Structure of the Invention In order to achieve the above object, the present invention alternately provides outward-facing claws on the outside of the resin cover and inward-facing claws on the inside, and furthermore, at least one or more claws are provided on the outside of the door body. It has the effect that it can be easily assembled and replaced by fitting the tabs in for installation and removing the tabs from the outside for removal.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, a door front plate 4 is welded to the door body 1. The resin cover 3 has a structure in which one side is hooked into a square hole 1b in the outer wall surface of the door body 1, and the other side is hooked into a flange 4a of the door front plate 4. At this time, the claw 3 of the resin cover 3
As shown in FIG. 3, claws 3a and 3c are provided alternately with claws 3a to be hooked to the square holes 1b of the support plate 1a of the door body 1 and claws 3c to be hooked to the door front plate 4. The hooking directions are set in opposite directions. As shown in FIG. 5, on the side where the door body 1 is opened and closed, there is a door key 7 for opening and closing a switch, and the door key 7 is supported by the door body 1 and the support plate 1a. The support plate 1a has an opening 8 (FIG. 6) for hooking the claw 3a of the resin cover 3. The resin cover 3 is provided with a notch 3d within the range in which the door key 7 moves smoothly, and a claw is provided at a location where it can be operated from the notch 3d, and is hooked onto the support plate 1a and the door front plate 4.

The operation of the above configuration will be explained below.
As explained above, the hooking method of the resin cover 3 simplifies assembly work. When replacing the door key 7 due to breakage or melting of the resin cover 3 due to misuse, first remove the claw 3a hooked onto the support plate 8 from the notch 3d of the resin cover 3, as shown in FIG. As shown in Figure 4, by applying a force in the direction of arrow F, the claw 3c, which is hooked on the door front plate 4, moves in the direction of broken line arrow F' and is removed. The other claws 3a and 3c can then be easily removed.

As described above, according to this embodiment, the resin cover 3
The outer periphery has an outward facing claw 3a, and the inner periphery has an inward facing claw 3a.
3c are provided alternately and at least one or more claws 3a can be operated from the outside, so that the resin cover 3 can be easily replaced when the resin cover melts due to bending of the door key 7 or misuse. Furthermore, since the claw 3c is not hooked onto the slit plate 6, there is no need to worry about an increase in radio wave leakage due to deformation.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The resin cover can be easily removed without damaging it.

(2) Assembly time can be reduced.

[Brief explanation of drawings]

1 and 2 are sectional views of the main parts of a conventional resin cover, FIG. 3 is an external perspective view of the main parts showing an embodiment of the present invention, FIG. 4 is a sectional view of the main parts, and FIG. 5 is a sectional view of the main parts of a conventional resin cover. FIG. 6 is a perspective view of the main part of the support plate. 1...Door body, 2...Door inner frame, 3...
Resin cover, 3a, 3c...claw, 3d...notch, 4...door front plate, 6...slit plate, 7...
...door key.

Claims (1)

[Scope of Claims] 1. A door body having a radio wave seal structure, and a resin cover that hides the radio wave seal structure in appearance, and the resin cover has an outward facing claw on an outer periphery and an inward facing claw on an inner periphery. High frequency heating device configured to be installed alternately. 2. The high-frequency heating device according to claim 1, wherein at least one of the claws provided on the outer periphery of the resin cover can be removed from the outside through a notch in the resin cover.