JPS5832390A - High frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a hinge to a main body, and provides a high frequency heating device that reliably prevents leakage of radio waves.

Various structures have been invented, devised, and put into practical use to prevent radio wave leakage from around the door of a high-frequency heating device, such as one using a choke attenuator and one using a radio wave absorber.

For example, as shown in FIG. 4, on the front left end of the main body 1.

The fulcrum of the hinge 6.6 protruding from the bottom is the hinge metal fitting 31
Tightly tighten this hinge fitting 31 into the hole 10 provided in the door 3.
11 to open and close the door 3. However, with such a configuration, the upper sash 32 provided on the upper part of the main body 1 and the lower sash 33 provided on the lower part must be provided with 34 notches. The installation of the door 3 was not suitable because of its poor radio wave blocking properties, such as leakage of light from the lighting lamp inside the heating chamber 2 or leakage of radio waves.

The present invention eliminates the drawbacks of the conventional high-frequency energizing device described above, and includes a main body having a heating chamber, and a door provided in the opening of the heating chamber so as to be openable and closable via a hinge provided on the main body. A choke groove is formed on the inner outer circumference of the door, a periodic structure having notches at regular intervals is provided in the choke groove, and the door is supported between the outer circumferential side wall of the door and the M-phase structure. By using a structure in which a hinge part is provided, a choke attenuator and a daisy structure are used in combination to reliably prevent radio wave leakage from the hinge part and the choke groove part, and the high-frequency heating device is inexpensive and highly reliable. It provides:

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Note that the same members as in the conventional example will be described with the same reference numerals.

FIG. 1 is a perspective view showing the high-frequency heating device of the present invention with the door open. .

In FIG. 1, reference numeral 1 denotes a main body of a high-frequency heating device, and a heating chamber 2 is provided within this main body 1. 3 is the door, heating chamber 2
It is attached to an upper hinge 6 part and a lower hinge 6 part provided above and below the opening peripheral part 4, and is configured to be openable and closable. 7
is an inner plate provided on the door 3 that comes into surface contact with the opening peripheral edge 4 of the heating chamber 2 to prevent high frequency waves from leaking from inside the heating chamber 2. Reference numeral 8 denotes a carper provided in the choke groove 9 on the inner outer periphery of the door 3, as shown in FIGS. 2 and 3.

In FIG. 2, reference numeral 10.11 indicates that the fulcrum 12 of the crotch hinge A is attached above and below the door 3, so that the door 3 can be opened and closed laterally. Reference numeral 13 denotes a high frequency generator that supplies high frequency waves into the heating chamber 2 .

FIG. 3 is a perspective view showing a state in which the cover 8 provided on the chimney groove 9 of the door 3 shown in FIGS. It is a periodic structure made of metal plates. 16 is constant in the periodic structure 14 (
4) The choke groove 9 is divided into two parts by the periodic structure 14 at the notch t=a part provided at the interval of 69 (e turtle, 9b
) has been done.

The hinge 6.6 part is located between the two-divided thread groove eb', that is, the outer peripheral side wall 16 of the door a and the periodic structure 14, and the fulcrum 12 of the hinge 6.6 part is caulked into the hole of the door 3. , door 3
It is configured to open and close.

When heating an object to be heated with high frequency in the high frequency heating device configured in this way, the object to be heated is placed in the heating chamber 2, the door 3 is closed, and the high frequency generator 1a is operated. High frequency waves are supplied into the heating chamber 2, but since the opening rim of the heating chamber 2 and the inner panel of the door 3 are in surface contact,
Radio wave leakage to the outside is attenuated.

Further, the radio waves that have passed through the inner plate 7 (for example, when the door 3 is ajar) will proceed to the choke grooves 9a and eb, but the shape 9 dimensions of the periodic structure 14 should be set appropriately according to the frequency of the radio waves to be used. By attaching the hinge 6.6 between the outer peripheral side wall 16 of the door 3 and the periodic structure 14, the distance between the periodic structure 14 and the outer peripheral side wall 16 of the door 3 and the periodic structure can be reduced as shown in FIG. The dimension B between 14 and 14 can be appropriately provided.

Further, by providing the periodic structure 14 in the choke groove 9, the radio waves along the periodic structure 14 in the x=J direction can be regulated and attenuated by the N-period structure 14.

Also, the radio waves heading toward the square yoke groove 9 have a two-way component X.

If the radio waves proceed as a composite radio wave of 2, the radio waves in the X direction are regulated by the periodic structure 14, and the radio waves in the 2 directions are transmitted through the choke groove 9.
Therefore, by setting the dimension C of this choke groove 9 to an optimum dimension, the effect of attenuating radio wave leakage can be made extremely high. Therefore, not only when the door 3 is closed, but also when the door 3 is half-open, the radio wave leakage can be suppressed to a sufficiently low value with respect to the permissible value.

Furthermore, when attaching the door 3 to the upper hinge 5 and lower hinge 6 provided at the upper and lower left end of the opening peripheral edge r of the heating chamber 2,
There is no need to provide a notch in the door 3, the door 3 can be installed more easily than before, and the door 3 can be opened and closed smoothly with a light force without worrying about radio wave leakage.

Furthermore, rather than using a radio wave absorber to prevent radio wave leakage, using the periodic structure 14 made of a metal plate has better heat resistance and workability, and it is possible to realize a high-frequency heating device that is inexpensive and highly reliable. can.

As is clear from the above description, the high-frequency heating device of the present invention includes a main body having a heating chamber, and an inside side of a door provided in the opening of the heating chamber so as to be openable and closable via a ζ ring part provided in the main body. A choke groove is formed on the outer periphery, a periodic structure having notches at regular intervals is provided in the choke groove, and a hinge part for supporting the door is provided between the periodic structure and the outer peripheral side wall of the door. By using a choke attenuator and a periodic structure in combination, we are able to reliably prevent radio wave leakage from the hinge and choke grooves, and provide an inexpensive and highly reliable high-frequency heating device that allows the door to open and close smoothly. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a high-frequency heating device showing an embodiment of the present invention, FIG. 2 is a sectional view of the same side, and FIG. 3 is a door view showing a state in which the cover shown in FIGS. An enlarged perspective view of the
FIG. 4 is a front view of a high-frequency heating device showing a conventional example of the present invention. 1... Body, 3... Door, 5, 6...
... Hinge portion, 9.9a, 9b ... Choke groove, 14 ... Periodic structure, 16 ... Outer peripheral side wall.

Claims (1)

[Claims] It consists of a main body having a heating chamber, and a door provided in the opening of the heating chamber so as to be openable and closable via a hinge part provided on the main body, and a choke groove is formed on the inner outer circumference of the door, and this A high-frequency heating device that has a hinge section in the choke groove.