JPS5928635Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention aims to simplify the configuration of a high-frequency heating device having a choke structure and to prevent malfunction of the control section due to wave leakage.

Conventionally, in high-frequency heating devices that have a door body, in order to suppress radio wave leakage from the contact surface between the door body and the heating chamber, it is common to provide a radio maze, a so-called choke structure, on either the door body or the heating chamber. be.

Figures 1 and 2 show examples in which this choke is provided on the door body, which is the most popular example of a choke structure.

A door body 1 is attached to the opening of a heating chamber 2 so as to be openable and closable, and a frame body 4 integrally formed with an operation panel 3 surrounds the door body 1.

5 is a handle provided on the door body 1, and 6 is a locking piece that locks the door body 1 in the closed position.

FIG. 2 is a sectional view taken along the line AA of this door body, showing the choke structure.

The small chamber 7 surrounded by the door body 1 is a choke, and its effective effective length is selected to be an integral multiple of a quarter wavelength.

A decorative plate 8 closes the entire circumference of the opening of the choke to prevent foreign matter from entering the choke, and is made of a low dielectric material such as polypropylene.

On the other hand, the frame body 4 not only improves the appearance of the device, but also has a radio wave absorber 9 such as ferrite rubber arranged therein in many cases.

For this purpose, the frame 4 is also made of a low dielectric material such as ABS.

Reference numeral 10 denotes a peephole consisting of a porous finder sandwiched between transparent resin or glass.

Now, in this way, the conventional door body has a small chamber 7 that forms a choke.
It consists of a decorative board 8 that closes this opening, and a frame 4 that houses a radio wave absorber inside.

Although there are few examples, this component remains the same even if a choke is installed on the oven side.

The present invention focuses on the fact that both the decorative board 8 and the frame body 4 are made of a low dielectric material, and attempts to simplify the structure by configuring them in one piece.

It also prevents leakage waves from entering the operation panel and prevents malfunctions of the control unit.

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

FIG. 3 shows an embodiment of the present invention, and A-
It is an A sectional view.

The choke chamber 7 is provided around the opening of the heating chamber 2.

The opening 11 is closed by extending a part of the frame 4' parallel to the door, and the frame 4' is of course made of a low dielectric material.

A radio wave absorber 9 is disposed within the frame 4' as required, and with this configuration, the decorative plate 8 that closes the conventional choke opening can be omitted.

In addition, the door body decorative member 1' is made of synthetic resin, and the conventional door body, which had to be thickened due to the presence of chalk, can be made thinner and lighter, and has excellent design. To eliminate leakage waves toward the outer periphery of the door body by allowing the leakage waves that have escaped to pass through instead of being reflected.

Therefore, leakage waves entering the operation panel 3 are blocked, preventing malfunctions of electronic circuits mounted thereon, and eliminating flickering caused by leakage waves from indicators such as neon lamps.

Furthermore, if one end 12 of the wall surface forming the choke chamber 7 is made to protrude forward as shown in the figure, the effect of the radio wave absorber 9 will be enhanced, and at the same time, the frame body 4, which was conventionally provided separately for fixing the frame body 4, will be improved. The metal fitting 13 (FIG. 2) can also be omitted.

As described above, the present invention greatly simplifies the choke structure and has high practical value.

Furthermore, it is possible to prevent malfunctions due to leakage of waves in the control section in the operation panel, which is excellent in terms of safety.

[Brief explanation of drawings]

Figure 1 is a front view of the main body of the device showing a conventional example, and Figure 2 is the same A-
A sectional view and FIG. 3 are sectional views of the vicinity of the door body showing an embodiment of the present invention. 1.1'... Door body, 2... Heating chamber, 4
, 4'... Frame body, 7... Chalk chamber, 8... Decorative board.

Claims (1)

[Scope of utility model registration request] A heating chamber in which an object to be heated is placed, a door provided at the opening of the heating chamber so as to be openable and closable, a radio maze located opposite to the door and provided around the opening of the heating chamber, and the door. The outer edge of the radio maze extends perpendicularly to the gate body, and the radio wave absorber is arranged here, and the frame body is made of a radio wave absorber. A high-frequency heating device that integrally closes the opening of the radio maze and the opening of the radio wave maze, and has a decorative member that covers the outer shell of the door body molded from synthetic resin.