JPH0612175B2 - High frequency heating device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a high-frequency heating device in which a cabinet body and a heating chamber are integrally structured.

[Technical background of the invention and its problems]

As shown in FIG. 6, a high frequency heating device generally has a heating chamber b as an inner box inside a cabinet body a as an outer box.
The heating chamber b has a structure in which a door body d covering the opening c of the heating chamber b is pivotally attached to the front surface of the heating chamber b to keep the temperature inside the heating chamber b at a high temperature and enhance the cooking ability. However, since the inner box is housed inside the outer box, the outer shape is large and the amount of material used is
It also has drawbacks such as increased production cost, and a single cavity structure in which an outer box and an inner box are integrated has been developed.

By the way, a conventional high-frequency heating apparatus having a single cavity structure is as shown in FIGS. In the figure, reference numeral 1 denotes a door body, and this door body 1 is pivotally attached to a front surface of a heating chamber 2 so as to be freely opened and closed. A machine room 3 is formed under the heating room 2, and a timer 4 and a door open button 5 are provided on the front surface of the machine room 3. Further, in the heating chamber 2, as shown in FIGS. 7 to 10, the front plate 7, the ceiling plate 8, the rear plate 9 and the bottom plate 10 having the opening 6 on the front surface are superposed on the bottom plate 10, and the superposed portion is formed. In order to prevent radio waves from leaking from 11, spot welding was performed at a pitch of 1/4 wavelength or less.
Further, the food rack 12 is supported between the front plate 7 and the rear plate 9. Therefore, the front plate 7 is integrally provided with a support portion 13 formed by bending the lower edge of the opening 6. A separate support member 14 was provided inside the rear plate 9. Since this support member 14 is provided in the heating chamber 2, it is necessary to prevent the generation of sparks due to the electric field.
It is performed at a pitch of 4. In this way, the tubular body 15 whose both sides are open is formed, and the left side plate 17 and the right side plate 1 which are reinforced by the flange portions 16 are formed on the both open sides.
8 and 8 are welded together.

Although the material cost is significantly reduced by adopting the above-described configuration, a large amount of work time is required for welding the overlapping portion 11 and welding the support member 14 to the food shelf 12 as a separate component, which requires a large amount of production time. There was a problem that it was poor.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a high-frequency heating device that improves productivity and is inexpensive.

[Outline of Invention]

In the present invention, in order to achieve the above object, the front plate, the ceiling plate, the rear plate and the bottom plate of the heating chamber are integrally formed, and the bottom plate is polymerized and bonded at the rear plate and one end of the polymerized portion is formed. The part is bent inside the heating chamber, and the support part of the food shelf is integrally formed.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 21 denotes a door body which is provided on the front surface of the heating chamber 22 so as to be openable and closable, and closes an opening 23 on the front surface of the heating chamber 22. A machine room 24 is provided below the heating room 22. A timer 25 and a door open button 26 are provided on the front surface of the machine room 24. As shown in FIG. 3, the heating chamber 22 has a front plate 27, a ceiling plate 28 and a rear plate 2 having the opening 23 on the front surface.
9 and the bottom plate 30 are integrally formed, the bottom plate 30 is superposed on the rear plate 29, and the tubular body 32 is formed by spot welding along the superposed portion 31. The side plates 33 and 33 are spot-welded to the open end of the. One end of the superposing section 31 has a heating chamber 2
A shelf support portion 35 for the food shelf 34 is formed by bending and superimposing inward of 2 and spot welding along the overlapping portion 31 at a pitch of 1/4 wavelength or less. The food shelf 34 is supported by a shelf supporting portion 36 that is opposed to the shelf supporting portion 35 and is formed by bending the lower edge of the opening 23 of the front plate 27 and shaping the end portion thereof into the heating chamber 22. Is configured.

〔The invention's effect〕

As described above, in the present invention, the heating chamber has the structure in which the front plate, the ceiling plate, the rear plate and the bottom plate are integrally formed, and the bottom plate is polymerized in the superposition section provided in the rear plate and joined. At the same time, since the end portion of the overlapping portion is used as a supporting portion for supporting the food shelf, if joining is performed so as to prevent radio wave leakage from the overlapping portion, the joining process for the supporting portion of the food shelf becomes unnecessary. Therefore, the working time and the material cost are reduced, and the productivity is improved, so that the high-frequency heating device can be provided at low cost. Further, since the rear plate is provided with the overlapping portion, the strength of the rear plate is increased and deformation is prevented, so that there is an effect that impedance in the heating chamber is stabilized and microwave characteristics are improved.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is an exploded perspective view showing a heating chamber, and FIG. 4 is a heating chamber. A vertical side view, FIG. 5 is a vertical side view showing a stacking portion and a shelf support portion provided on a rear plate in an enlarged manner, and FIG. 6 is a vertical side view showing a conventional high-frequency heating device.
7 to 12 show a conventional high-frequency heating apparatus having a single cavity structure, FIG. 7 is a front view, FIG. 8 is a side view, FIG. 9 is a heating chamber showing an exploded perspective view, and FIG. FIG. 11 is an enlarged sectional view showing a portion A of FIG. 10 in an enlarged manner, and FIG. 12 is an enlarged sectional view showing a portion B of FIG. 22 ... Heating room, 27 ... Front plate, 28 ... Ceiling plate, 29
...... Rear plate, 30 …… bottom plate, 31 …… polymerization part, 34 …… food shelf, 35 …… shelf support part.

Claims (1)

[Claims] 1. A high-frequency heating apparatus having a single-cavity structure in which a cabinet body as an outer box and a heating chamber as an inner box are integrally formed, and a front plate, a ceiling plate, a rear plate and a bottom plate of the heating chamber are integrally formed. Then, the bottom plate is joined at the overlapping portion provided on the rear plate, and one end portion of the overlapping portion is bent toward the heating chamber, and the bent portion is used as a shelf supporting portion of the food shelf. High frequency heating device.