JPS5839284Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention realizes a structure in which a cooking plate or a gridiron inside the heating chamber automatically pops out to the outside of the heating chamber in response to the opening/closing operation of the door body.

Conventionally, the automatic sliding method of cooking plates as described above has not been implemented in high-frequency heating devices, generally microwave ovens, for the following reasons.

First, a mechanism is installed in the heating chamber to transmit the movement of the door body to the cooking plate, but this method generates sparks in the high-frequency electric field in the moving part, which may damage the mechanism or cause the spark part to generate heat. There is also a high risk of burns to the user.

On the other hand, there is a method in which the transmission mechanism is provided outside the heating chamber, but this requires a hole in the wall surface of the heating chamber to connect the transmission mechanism outside the heating chamber and the cooking plate inside the heating chamber.

However, in order to prevent leakage of high frequency waves to the outside of the heating chamber, it is impossible to drill large holes, and therefore this method is also difficult to implement.

In view of this background, the present invention is intended to realize an automatic sliding structure for cooking plates with no sparks or radio wave leakage.

The configuration of the present invention will be explained below with reference to the drawings.

FIG. 1 is a plan sectional view of a heating chamber showing an embodiment of the present invention.

A indicates the door closed state, and b indicates the door open state.

In FIG. 1a, a door body 3 closes an opening 2 of a heating chamber 1. In FIG.

The cooking plate 4 is placed in the heating chamber 1, and an elastic body 5 such as a leaf spring is attached to the rear end thereof.

The cooking plate 4 is forcibly pushed into the heating chamber by the door body 3, so that the elastic body 5 is in a compressed state.

Now, in this state, high frequency waves are irradiated from a high frequency oscillator such as a magnetron, and when the heating of the object to be heated is completed, the door body 3
The cooking plate 5 is opened and, as shown in FIG.

(arrow direction). At this time, if the elastic body 5 is made of metal such as a leaf spring, a dielectric material is provided on the heating chamber wall that comes into contact with the elastic body 5, or the heating chamber itself is coated with an insulating coating such as painting or enamel treatment. By that,
Sparks can be easily prevented.

Naturally, there is no need to make any holes, large or small, in the heating chamber wall surface for sliding the cooking plate, so there is no leakage of radio waves to the outside of the heating chamber.

Of course, the elastic body 5 may be made of an elastic dielectric material such as foamable plastic, and in this case, even the above-mentioned spark countermeasures are not necessary.

Note that even if the elastic body 5 is provided on the heating chamber side, exactly the same effect can be obtained.

FIG. 2 shows one such embodiment, in which a compression coil spring 6 is used as the elastic body.

In this embodiment, the coil spring 6 is housed in a metal cylinder 7 as a countermeasure against sparks.

In other words, when the door is closed as shown in Fig. 2a, the coil spring 6 is completely submerged in the metal cylinder 7, so if the diameter of this cylinder is selected to be below the operating frequency, the high frequency will suddenly increase within the cylinder. Therefore, sparks do not occur even between the windings of the compressed coil spring 6.

At this time, if the cooking plate 4 is a glass plate or a metal plate coated with an insulating coating such as enamel, sparks between the metal circular tube 7 and the coil spring 6 and the cooking plate 4 can be easily prevented.

When the door body 3 is subsequently opened, the cooking plate 4 is caused to fly outward (in the direction of the arrow) by the coil spring 6 as shown in Figure b, just as in the previous embodiment.

In addition, to ensure smooth sliding, dielectric rails may be provided on the sides of the cooking plate, and the amount of protrusion of the cooking plate may be restricted.
~Considerations such as providing a collar are also important in increasing the effectiveness of implementing the present invention.

Also, countermeasures against sparks between the door body 3 and the cooking plate 4 are of course unnecessary if the cooking plate is made of dielectric material such as glass, but in the case of a metal plate, insulating coating treatment such as enamel or painting may be applied to the metal plate or the door body. This can be solved by placing the cooking plate on at least one of the surfaces or by placing the cooking plate against a dielectric screen such as the glass of a viewing window.

As explained above, according to the present invention, all the means for sliding the cooking plate are placed inside the heating chamber, so there is no need to make holes in the heating chamber wall, and therefore there is no leakage of high frequency waves. .

Secondly, since the sliding means is simple and does not have complicated mechanical connections, it is easy to take measures against sparks.

In this way, the present invention solves the two major problems of radio wave leakage and sparks, and makes it possible to realize an automatic cooking plate pop-out structure.

[Brief explanation of drawings]

Figures 1a and 1) are plan sectional views of the main parts of a high-frequency heating device showing one embodiment of the present invention, and Fig. 2 is a plan sectional view of the main parts showing another embodiment. indicate the door open state. 1... Heating chamber, 3... Door body, 4...
...Cooking plate, 5...Elastic body, 6...
Compression coil spring, 7... Metal cylinder.

Claims (1)

[Scope of utility model registration request] An oscillator that excites high frequency waves, a heating chamber that irradiates the high frequency waves, a door that can be opened and closed at the opening of the heating chamber, and a cooking plate or gridiron that is placed inside the heating chamber and on which the object to be heated is placed. It consists of an elastic body disposed on at least a part of the cooking plate or the gridiron, or the wall surface of the heating chamber located opposite thereto, so that the cooking plate or the gridiron protrudes outside the heating chamber when the door is opened by the elastic body. A high-frequency heating device characterized by comprising: