JPS6367614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a high frequency heating device such as a microwave oven.

Conventional configuration and its problems Cooking appliances such as microwave ovens are often placed near the cooking area in the kitchen, but due to housing conditions and the diversification of cooking-related appliances, the space for placing these cooking appliances has become limited. is subject to major restrictions.

Conventional heating cooking appliances such as microwave ovens are generally equipped with a heating chamber and an operating section to the right of the heating chamber.The operating section is located at the front of the electrical chamber that houses the high-frequency generator and other electrical components. There are knobs such as a timer for setting the heating time and a dial for setting the temperature in the heating chamber.

The reason why these operation parts are located on the right side of the main body is based on the assumption that the majority of users are usually right-handed, and does not take into account the arrangement of various appliances in the kitchen. In other words, depending on where these heating cookers are placed, the door that covers the front of the heating chamber may need to open to the left or the right, and depending on the opening/closing direction of the door, the operating section may also open to the left. In some cases, it may be easier to operate the device if it is on the left side, but in reality there is no such thing as a device with a left-hand control section. Even if the door opens from the front, the operating section is usually located on the right side.
A heating cooking appliance having such a configuration has the disadvantage that it is extremely difficult to operate depending on the location where it is placed, and also requires a large installation space.

Recently, some devices have been seen in which the operation section is placed at the top or bottom of the main body to alleviate the above-mentioned drawbacks. However, even in this case, the heating chamber is mainly constructed of a double-layer structure in which an external material is placed over the outside of the box. In other words, there is a certain amount of space between the heating chamber and the external material, and although it is used as a place for installing heat insulating materials, various mechanical parts, and connecting wires, this space causes the external shape of the main body to vary. The drawback remains that the effective volume of the heating chamber is relatively small relative to the dimensions.

If the external shape of the main body is determined by the constraints of the installation base,
If we can secure a heating chamber volume that is as large as its external dimensions, the capacity of the heated object will increase accordingly.
This will ultimately lead to a reduction in heating time.
Also, if a heating chamber with the same volume as a conventional heating chamber but without the above-mentioned voids could be created, it would have the advantage of helping to reduce the installation space.
The volume of the heating chamber becomes proportionally smaller, and the external shape of the main body becomes larger based on the volume of the heating chamber, which has the drawback of requiring a larger installation area.

In addition, the exterior plate and the heating chamber are made of the same material,
A configuration that increases the heating chamber volume is also available in patent application 1986-75786.
If the operation panel and power supply part were placed at the bottom using the method shown in No. 3, the place to install the door latch would be limited, and it would end up on the lower side of the bottom edge of the door.
For example, if the door handle is on the right side, the top and bottom of the door will latch and affect the twist, and the top of the door will be separated from the main body, creating a gap.
Even though radio waves were leaking, it was expected that the latch would not be released, making it unsafe.

The present invention solves the above-mentioned conventional problems.The operating section is easy to operate regardless of where the appliance is placed, and the external dimensions are extremely small compared to the size of the heating chamber, and the installation area is small. The purpose is to provide safe equipment with no leakage.

Structure of the Invention In order to achieve the above-mentioned object, the high frequency heating device of the present invention has a substantially U
The side wall of the shaped heating chamber is fixed, and the door latch is installed between the double U-shaped interior and exterior, increasing the degree of freedom in design by allowing it to be installed only in the center of the side-opening door, or on both the top and bottom. At the same time, it is possible to set the position of the door latch without leaking radio waves.

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

FIG. 1 is an exploded perspective view of a housing portion of a high-frequency heating device according to an embodiment of the present invention, and FIGS. 2 and 3 each show a cross section of the device. 1 is a front plate, 2 is a back plate, 3 is an exterior plate, which includes a top surface 3a, a left side surface 3b,
The right side surface 3c is formed of a single metal plate into a substantially U-shape, and inside the exterior plate 3, the side wall 4 of the heating chamber 5 has an upper surface that also serves as the upper surface 3a of the exterior plate 3. The left side wall 4a, the bottom surface 4b, and the right side wall 4c are formed from one metal plate in a substantially U-shape, and the horizontal surface of the bottom surface 4b is fixed on the same plane as the opening lower end 1a of the front plate 1 of the heating chamber. ing.

Above the bottom surface 4b is a heating chamber 5, and below it is an electrical chamber 6 for storing electrical components.

There is a door 7 in front of the heating chamber opening of the front plate 1,
A door key 8 is pivotally supported on the door 7, and a door key spring 9 is attached to the door 7.
The door key 8 is energized downward. On the other hand, on the main body, a door hook 9 for catching a door key 8 is installed in a space between the right side surface 3c of the exterior plate 3 and the right side wall 4c of the heating chamber 5 (when the door key 8 is energized,
As shown in FIG. 2, the switch 10 is turned on. ) It is fixed to a metal fitting 11 fixed to the right side wall 4c of the heating chamber 5.

When the door 7 is opened and the door key 8 is no longer energized, the switch 10 is turned off, the high frequency circuit stops oscillating, and no radio waves are emitted. In the embodiment shown in FIG. 2, one door latch mechanism is provided near the center of the top and bottom of the door, but there is sufficient space even if two door latch mechanisms are provided above and below.

Next, electrical control parts are attached to the floor plate 12 of the main body of the apparatus, and fixed so as to be housed in the electrical room 6 through the opening at the bottom of the inverted U-shape of the exterior plate 3. Further, numeral 13 is a tray for placing the object to be heated, and is rotated by a motor 14.

15 shows a timer for setting a heating time as an example of the arrangement of operating parts.

According to the configuration of the present invention as described above, the heating chamber 5
The bottom surface 4b of the front plate 1 is horizontally substantially flush with the opening lower end 1a of the front plate 1, which makes it easy to clean and take the saucer 13 in and out, making it more convenient to use. 3a, the effective volume of the heating chamber 5 can be increased relative to the external dimensions, and by arranging various electrical components at the bottom, the center of gravity of the main body is located downward, making it stable despite its light weight. Installation can be done with ease.

In addition, by effectively utilizing the space outside the heating chamber wall and inside the exterior panel, the door latch can be placed in various positions with a high degree of freedom in design, such as one in the vertical center of the door, or two at the top and bottom of the door. This has the effect of making it possible to design a safety switch that will never turn off even if the door is twisted and radio waves are leaking.

Since an opening is provided in the exterior plate 3 and the inspection chamber is attached with screws, there is an effect that work efficiency is improved both during assembly and service.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The operation section is located at the bottom of the main body so that it can be easily operated regardless of where the main body is placed.

(2) The outside of the top and back surfaces of the heating chamber is the exterior of the main body, there are no extra voids, there are no other components, and the height of the main body is relatively and substantially low;
Effective use of installation space in the kitchen can be achieved.

(3) Since the top surface of the heating chamber also serves as the top surface of the exterior plate,
The weight can be reduced accordingly, and the material cost can also be reduced accordingly.

(4) Right side 3c of exterior plate 3 and right side 4 of heating chamber 5
A door latch part can be provided by making good use of air conditioning with C, and unlike conventional door latches, the door latch is limited to the bottom of the door, and the door twists.
Since the position of the door latch can be freely set so that the switch does not turn off even when radio waves are leaking, it is possible to provide a high-frequency heating device with a safety device that completely eliminates radio wave leakage.

(5) Electrical components are placed all at once on the floor plate of the main unit and stored in the electrical room on the exterior board, and most of the work can be done before assembling the parts and storing the wiring.
In addition to being easy to assemble, the center of gravity of the entire device is located at the bottom, allowing for extremely stable installation.

(6) Since the lower end of the front plate opening and the horizontal plane of the bottom of the heating chamber are approximately on the same plane, it is easy to take in and out objects to be heated and saucers, and the inside of the heating chamber can be cleaned very easily. .

(7) Since the opening in the exterior plate is large enough to cover the door latch, it is very easy to attach the door latch to the main body, wire it, and remove it during service, install it, and inspect it.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the exterior plate, heating chamber plate, etc. of a high-frequency heating device according to an embodiment of the present invention, and FIG.
A vertical cross-sectional view taken along the line A-A' in the figure.
It is a cross-sectional view taken along the line BB' in the figure. 1... Front plate, 2... Back plate, 3... Exterior plate, 4...
...Heating chamber side wall, 5...Heating chamber, 6...Electric room, 7
... Door, 8 ... Door key, 9 ... Door key spring, 10 ... Switch, 11 ... Metal fitting, 12 ...
Floor plate, 13...Saucer, 14...Motor, 15...
…timer.

Claims (1)

[Scope of Claims] 1. An exterior plate formed of a single plate having a substantially U-shape on the top surface and left and right side surfaces of the heating device body, and a single plate located inside the exterior and having a substantially U-shape on the bottom surface and left and right sides. The side wall of the heating chamber formed by and the back plate of the heating device main body,
The front plate of the heating device main body has an opening for putting in and taking out the heated object, the door is pivotally supported in front of the opening of the heating chamber so that it can be opened and closed freely, and the side wall of the heating chamber is fixed to the upper surface of the exterior plate, and the heating device main body is attached to them. The heating chamber formed by fixing the back plate and front plate of
It is equipped with a bottom plate of the heating device main body fixed to both end faces of the letter-shaped exterior plate, an electrical room that stores the electrical components of the high-frequency generator, and a safety device that is linked to the movement of the door. A high-frequency heating device having a structure in which an electrical room and a safety device are provided in a space formed by an exterior plate and a bottom plate of a heating device main body. 2. The high-frequency heating device according to claim 1, wherein an inspection window for the safety device is provided on the exterior plate corresponding to the safety device.