JPS609614Y2 - High frequency heating device - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to an improvement in the door of a microwave oven.

Conventional structure and its problems Conventionally, the door body of a microwave oven has been constructed with a die-cast door or a molded resin jacket attached to the outside of a sheet metal door for high-end models due to its appearance and cost increase.
It is common to have a transparent screen made of acrylic or other material on the front of the door, but especially for the molded resin outer cover mentioned above,
The reality is that until now, the outer cover has generally been integrally molded.

FIG. 4 shows the structure of a door using a conventional integrally molded door jacket.

In the figure, reference numeral 4 denotes a door body made of sheet metal, and an integrally molded resin jacket 13 is fixed to the door body 4.

The door screen 7 is fixed by bending the tip 14 of the molded resin jacket 13 with a mold.

8 is a screen barrier provided on the inside of the door, 9 is a radio wave absorbing material, and 11 is a heating chamber wall.

According to the above configuration, the molded resin outer cover 13 is covered with the door screen 7 and is molded to the part that is hidden from the outside appearance, so a large amount of molded resin is required and the cost is high. Ta.

In addition, many variations in design can be molded, and in addition, the frames of other conventional door bodies are all metal frames, and this development has replaced the metal frames with molded resin, reducing costs. Due to the flow, the molded resin jacket was integrally molded, but a large mold was required to hold and fix the door screen 7 to the integrally molded molded resin jacket, which resulted in a high cost. had.

Purpose of the Invention The present invention aims to solve the above-mentioned drawbacks by providing an inexpensive door jacket with a simple structure.

Structure of the invention In order to achieve this objective, the high-frequency heating device of the invention is
An extruded resin material cut in an inverted U-shape is fixed to the outer periphery of the door body, which is made of a metal exterior such as sheet metal, by heat welding, etc., and a slit-like groove is formed in the molded resin outer cover. A door screen is inserted into the slit-like groove from the open side (right side) of the inverted U-shape, and the transparent body is held and fixed from the open side of the inverted U-shape with a resin molded material integrally molded with the handle. It is configured to do this.

According to this configuration, since the molded resin jacket is cut, the amount of extrusion molded resin material can be reduced compared to the molded resin material that is integrally molded.

Furthermore, the door screen can be easily attached to the molded resin material.

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

In FIGS. 1, 2, and 3, reference numeral 1 indicates a body cover of a microwave oven body according to an embodiment of the present invention, 2 indicates an operation panel thereof, and 3 indicates a door body thereof.

The door body 3 has a trim-shaped extruded resin material 5 partially fixed to the outer periphery of a door body 4 made of sheet metal by heat welding, etc., and a slit formed in advance in the molded resin material. The door screen 7 is inserted and fixed through the shaped groove 6.

In this experiment, 8 is a screen barrier provided inside the door body 3, 9 is a radio wave absorbing material, 10 is a door choke cover made of a non-dielectric material, and 11 is a heating chamber wall.

On the other hand, the right side of the U-shaped trim-shaped molded resin body, that is, the open direction side, is configured such that after inserting the screen, the screen is fixed with a handle 12 and at the same time is covered.

As mentioned above, since the door body 3 of this embodiment has a structure in which the outer cover of the door body 3 is made of extruded resin material 5, the total mold cost can be reduced to less than 1 of the conventional ratio, and the design is improved. Since it is an extrusion molded product, it is also possible to integrally mold futures (sats, etc.), and its practical value can be said to be extremely large.

Effects of the invention As mentioned above, this invention uses a molded resin material that has undergone cut processing, so the amount of material can be significantly reduced compared to an integrally molded resin material, and it also holds the door screen firmly. Since a large mold is not required for this purpose, the total mold cost can be reduced to less than one ounce of the conventional one-piece mold, and its practical effects are great.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main body of the microwave oven showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the door, Fig. 3 is an enlarged sectional view of the handle of the door, and Fig. 4 is an enlarged sectional view of the door handle. It is an enlarged cross-sectional view of a conventional door. 4... Door body, 5... Extruded resin body, 6... Slit shape ll, ? −−−−−−Door screen, 12... Handle.

Claims (1)

[Scope of utility model registration request] An extruded resin material cut into an inverted U-shape is fixed to the outer periphery of the door body, which is constructed of a metal body such as a sheet metal, by heat welding, etc., and the molded resin material is provided with a first slit-shaped groove. A second slit-like groove is also provided in the second resin molded material integrally molded with the handle, and a door screen is inserted into the first slit-like groove and the second slit-like groove to be held and fixed. A high-frequency heating device with the following configuration.