JPS5941594Y2 - High frequency heating device - Google Patents

Description

[Detailed description of the invention] The invention relates to a high frequency heating device such as a microwave oven.
Especially regarding improvements to door bodies.

In this type of microwave oven, the door body that opens and closes the opening of the heating chamber has an inner barrier, a screen made of punched metal, and an outer barrier, which closes a viewing window provided in the door body. It is made by attaching a polymerized product.

The inner and outer barriers prevent foreign matter from entering through the punched holes in the screen, and also prevent the screen from becoming dirty due to oil and moisture scattered from the heated object during cooking.

However, if the inner barrier is placed directly on the screen, a narrow gap will be created between them, and there is a risk that the oil and moisture will enter this gap, clouding the inner barrier and impeding the see-through effect.

Therefore, conventionally, as shown in Fig. 1, a concave groove C formed in a packing b along the peripheral edge of an inner barrier a is fitted, and this packing b is screwed onto a screen d via a contact piece f. It is fixed by the holding surface of the holding fitting e, and seals between the screen d and the inner barrier a.

However, since the presser fitting e is required, the cost is high, and since this is sheet metal processing, end face processing must be performed, which is troublesome.

Furthermore, it takes time and effort to fit the groove C into the peripheral end of the inner barrier a, resulting in poor assembly workability.

Furthermore, there are various disadvantages such as oil and moisture easily entering and adhering to the gap between the presser fitting e and the contact piece f and the gap between the presser fitting e and the inner barrier a, which is unhygienic.

The present invention was developed based on the above circumstances, and its purpose is to provide a door that has a relatively simple structure, yet can reliably seal between the inner barrier and the screen, and can reduce costs. The present invention aims to provide a high-frequency heating device equipped with a body.

An embodiment of the present invention will be described below based on FIG. 2 and subsequent figures.

In the figure, reference numeral 1 denotes the main body of a microwave oven, which is a high-frequency heating device, and an operation panel 2 equipped with a timer 2a, a power switch 2b, and a cooking switch 2c is provided on the front side of the main body 1.

Alongside the operation panel 2, a door body 3, which will be described later, is pivotally mounted to open and close an opening of a heating chamber 4 provided within the main body 1.

This heating chamber 4 is provided with a magnetron 5 which is a high frequency generator, a starrer fan (not shown), and the like.

Then, store the object to be heated in the heating chamber 4, set the cooking time using the timer 2a, and then turn on the power switch 2b and the cooking switch 2.
When c is input, the magnetron 5 oscillates high frequency waves, which are stirred by the stirrer fan so that the object to be heated can be cooked.

Next, the door body 3 will be explained.

That is, 6 is a door body which is formed by bending a metal plate into a flange shape and has a viewing window 6a on its inner peripheral surface.

As shown in FIG. 4, the cross section of the door body 6 is partially cut out on the inner surface side, and a cavity 7 is formed in the cavity surrounded by the metal plate.

Further, on the inner surface side of the door body 6 facing the viewing window 6a, a 29 rule barrier 8 made of a synthetic resin material, a screen 9 made of punched metal, and an inner barrier 10 made of a synthetic resin material to be described later are superimposed, A contact piece 11 made of a thin metal plate is interposed between the screen 9 and the inner barrier 10, and the door body 6 is fixed by a mounting screw 20, which is a fixing screw.
It is screwed on.

The contact piece 11 protrudes from the screen 9 and the inner barrier 10 so that when the door body 3 closes the heating chamber 4, it comes into contact with the outer wall surface of the heating chamber 4 to form a radio wave seal.

On the other hand, the inner barrier 10 is provided with a mounting step 12 along the periphery of one side thereof, as shown in FIG.

Further, near the four corners of the mounting step portion 12, there are vertical walls 12a.
A part of the peripheral wall in the axial direction is aligned flush with the protruding rod 13...
... are provided in one direction.

These protruding rods 13 fit into positioning holes 14 bored in the door body 6, outer barrier 8, screen 9, and contact piece 11 so as to communicate with each other. ing.

Further, a sealing member 15 in the form of an annular tube made of an elastic material is elastically positioned and fitted into the mounting step portion 12.
It is elastically deformed and fixed between the inner barrier 10 and the contact piece 11.

Moreover, 20a is a hole provided in the inner barrier 10 for inserting the mounting screw 20.

Note that 16 shown in FIG. 3 is a handle, 17 is a closing hook, and a hinge (not shown) is also provided.

The order of assembling the door body 3 is to close the viewing window 6a of the door body 6 with the outer barrier 8, overlap the screen 9 thereon, place the contact piece 11 on it, and align the respective positioning holes 14.

On the other hand, a part of the sealing member 15 is attached to a pair of protruding rods 13.13.
The remaining portion is elastically stretched and engaged with the remaining pair of protruding rods 13°13.

Then, the seal member 15 is moved to the mounting step portion 12 and positioned, and then each protruding rod 13 is inserted into the positioning hole 14.

The seal member 15 is elastically deformed and crushed.

Further, by screwing the inner barrier 10 and the like onto the door body 6 with the mounting screws 20, the sealing member 15 is fitted between the inner barrier 10 and the contact piece 11 in a compressed state, thereby ensuring a reliable seal.

The door body 3 is then completed by attaching the handle 16, hook 17, 17, hinge (not shown), etc.

In this way, in the above embodiment, the inner barrier 10 includes
Since the protruding rods 13 are provided so that the vertical wall 12a of the mounting step portion 12 and a part of the circumferential wall in the axial direction are flush with each other, the protruding rods 13 are provided with the seal member 15 at the mounting step. The contact piece 1 can be used as a guide when attached to the door body 6, and can also be used for positioning with respect to the door body 6.
1. Screen 9.29 Law Eliminates mutual positional deviation of the barrier 8, etc., and improves assembly efficiency.

As explained above, according to the present invention, a screen is provided on the inner surface of the door body so as to close the viewing window, and an inner barrier having a stepped part at the peripheral end is superimposed on this screen, and the above-mentioned mounting An annular sealing member is fitted into the stepped part, interposed between the inner barrier and the screen, and fixed with a fixing screw, eliminating the need for a conventional presser fitting and preventing accidental movement. The sealing member can be securely fixed, and costs can be reduced.

Furthermore, since the annular seal member can be fitted into the mounting step and fixed with a fixing screw, the assembly work efficiency is improved compared to the conventional one.

Furthermore, since the sealing member can reliably seal between the inner barrier and the screen, it is possible to reliably seal the space between the inner barrier and the screen, thereby preventing the screen from becoming dirty and fogging.

Furthermore, when the screen becomes dirty, it can be disassembled and cleaned, resulting in excellent cleaning performance.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the main part of the door body of a microwave oven, which is a high-frequency heating device that is a conventional example of the present invention, and Fig. 2 is a partially cutaway perspective view of the microwave oven that is an embodiment of the present invention. figure,
Figure 3 is a perspective view of the inner surface of the door body, Figure 4 is Figure 3 IV
FIG. 5 is a perspective view of the inner barrier and the sealing member. 3...Door body, 6a...Peep window, 6...
...Door body, 9...Screen, 12...
...Mounting step, 10...Inner barrier, 15.
...Seal member, 20...Mounting screw (
fixing screw).

Claims (1)

[Scope of utility model registration request] In those equipped with a door body that opens and closes the opening of the heating chamber,
The door body includes a contact piece for radio wave sealing, a door body having a viewing window, a Rule 29 barrier provided on the inner side of the door body facing the viewing window, and a screen superimposed on this outer barrier. , an inner barrier that is superimposed on the screen and has a mounting step along the screen side peripheral edge, and a protruding rod that is integrally provided near the four corners of the mounting step of this inner barrier, and the projecting rod communicates with each other. The door body, the outer barrier, the screen, and the contact piece are positioned and fitted into the positioning holes drilled in the door body, the outer barrier, the screen, and the contact piece, and the mounting steps of the inner barrier, and are interposed and fixed between the inner barrier and the screen. The annular elastic seal member, the outer barrier, the screen and the
and a fixing screw that fixes the inner barrier to the door body and compresses the elastic seal member.