JPS6367613B2 - - 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 the location of these heating cookers, the door that covers the front of the heating chamber may be required regardless of whether it opens to the left.
Depending on the opening/closing direction of the door, it may be easier to operate if the operating section is on the left, but in reality there is no such thing as a device with a left operating section. Also, even if the door is of a structure that opens from the front, the operation section on the right side is customary. 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 makes it difficult for the main body to The drawback remains that the effective volume of the heating chamber is relatively small relative to the external dimensions.

When determining the external shape of the main unit due to installation space constraints,
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 can be created without the above-mentioned voids, it would have the advantage of helping to reduce the installation space, but in reality, if the external dimensions of the main body are determined by installation space constraints,
The volume of the heating chamber becomes proportionally smaller, and when the volume of the heating chamber is used as a reference, the external shape of the main body becomes larger, which has the drawback of requiring a larger installation area.

In addition, if the product has a structure such as that of Japanese Patent Application No. 58-75780, in which the exterior plate and heating chamber are made of the same material, and the operation panel and power supply parts are on the bottom, there is no place to install the interior light. From the bottom of the heating chamber, it is impossible to illuminate the object to be heated, and out of necessity, an interior light was provided on the back plate, and a cover was also placed over the interior light to ensure the safety of the user. In this case, if you use a small cover, the heat from the interior light will shorten the life of the interior light, so if you use a cover of a certain size, the front and rear dimensions of the product will become larger. Despite having the configuration of No. 58-75780, the installation area became large.

Also, regarding where to install the door latch,
In the configuration as disclosed in Japanese Patent Application No. 58-75780, if the operation panel and power supply parts are placed at the bottom, the location where the door latch can be installed is limited. For example, if the door handle is on the right side, the vertical twist of the door will affect the latch, 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, resulting in a lack of safety.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, makes the operation part easy to operate regardless of where the appliance is placed, and further reduces the installation area by making the external dimensions extremely small compared to the size of the heating chamber. The purpose is to provide a small and safe device with no radio wave leakage.

Structure of the Invention In order to achieve the above object, the high frequency heating device of the present invention has an upper surface and left and right side surfaces of the heating device main body that are substantially inverted U.
A roughly U-shaped heating chamber side wall is fixed to the top of the exterior plate, which is made of a single board in the shape of a letter, and the interior light and door latch are installed in the same space between the double U-shaped interior and exterior. This configuration allows the door latch to be installed only in the center of the side-opening door, or at both the top and bottom, increasing the degree of freedom in design and allowing the position of the door latch to be set without any radio wave leakage. It is something that you have. In addition, since the interior light does not protrude outside the back plate and is installed inside the exterior panel, the front and rear dimensions of the product are reduced, and the safety cover for the interior light for the user is placed inside the exterior panel. Because there is
It also has the effect of being unnecessary and reducing costs.

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 FIG. 2 is a cross-sectional view of the device. 1 is a front plate, 2 is a back plate, and 3 is an exterior plate, which includes a top surface 3a, a left side surface 3b, and a right side surface 3.
A side wall 4 of the heating chamber 5 is provided inside the exterior plate 3, and the upper surface of the side wall 4 of the heating chamber 5 is formed by a single metal plate into a substantially U-shape. It also serves as the top surface 3a, and the left side wall 4a, bottom surface 4b, and right side wall 4c are formed into a substantially U-shape by a single metal plate,
The horizontal surface of the bottom surface 4b is fixed substantially flush with the opening lower end 1a of the front plate 1 of the heating chamber.

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

On the other hand, on the right side wall 4c of the heating chamber 5, there is a punched hole 8 that guides the light from the interior illumination lamp 7 into the heating chamber 5, and the holes are provided in a diameter, pitch, and number such that high frequency waves do not leak. The outside of the heating chamber 5 is provided with a heat-resistant material so that the exhaust gas from the heating chamber 5 does not flow out and have a negative impact on electrical components, and also to prevent objects to be heated from scattering and adhering to the internal lights, reducing the illumination effect. A transparent thin film 9 is attached. The interior light 7 is fixed to a metal fitting 10 on the outside of the right side wall 4c of the heating chamber 5.

On the other hand, there is a door 11 in front of the opening of the heating chamber 5 in the front plate 1, and a door key 12 is pivotally supported inside the door 11. The door key 12 is attached downward by a door key spring 13, and a switch 14 is turned on. There is. A door hook 15 on which a door key 12 is hung is fixed to a metal fitting 16 fixed to the right side wall 4c of the heating chamber 5 near the interior light 7 in the main body.

When the door 11 is opened and the door key 12 is no longer energized, the switch 14 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 still sufficient space even if two door latch mechanisms are provided, one above the other.

Next, electrical control parts are attached to the floor plate 17 of the main body of the apparatus, and are housed and fixed into the electrical room 6 through the opening at the bottom of the inverted U-shape of the exterior plate 3.

Further, reference numeral 18 is a tray for placing the object to be heated, and is rotated by a motor 19.

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

On the other hand, an opening 21 is provided in the right side surface 3c of the exterior plate 3 for installation and removal of the interior light 7, door latch mechanism hook 15, switch 14, lamp replacement, switch replacement, and wiring work during assembly and service. , the inspection window 22 is attached with screws 23.

As described above, according to the configuration of one embodiment of the present invention, the bottom plate 4b of the heating chamber 5 is connected to the opening lower end 1a of the front plate 1.
The tray 18 is on the same horizontal surface for easy cleaning.
It is easy to put in and take out the heating chamber, and it is convenient to use.Since it also serves as the upper surface of the heating chamber 5 and the upper surface 3a of the exterior plate 3, the effective volume of the heating chamber 5 can be increased relative to the external dimensions, and various electrical parts can be mounted. By placing it at the bottom, the center of gravity of the main unit is located downward,
Despite its light weight, it can be installed stably.

In addition, since the interior light 7 is installed by making good use of the space between the right side surface 3c of the exterior plate 3 and the right side wall 4c of the heating chamber 5, the interior light 7 is provided outside of the conventional back plate. This eliminates the need for a cover for the internal light, which reduces costs and has the effect of reducing the front and rear dimensions of the product.

Since the door latch is installed approximately in the vertical center of the door by effectively utilizing the space outside the heating chamber 5 and inside the exterior panel 3, it is safe because the door latch will not work if the door is twisted. This has the effect of completely eliminating radio wave leakage.

In addition, the opening 21 in the exterior plate 3 is sized to cover the door latch, interior light, and even electrical control parts, making it easier to assemble and remove each part, and inspect wiring. It's even effective.

Also, since the door latch and interior light are located close to each other in the same side space, the wiring itself is shorter.
Not only can costs be reduced, but also the wiring work can be completed in the same direction, resulting in extremely superior wiring work.

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 top surface and the outside of the back surface of the heating chamber are 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
By making good use of the space between C and C, an internal light can be installed, and the front and rear dimensions of the product can be reduced compared to the conventional method of installing a safety cover for the internal light on the outside of the device, reducing the installation space in the kitchen. can be used effectively. Furthermore, since the safety cover is provided with an exterior plate, it is not necessary and costs can be reduced.

(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 the saucer, and the inside of the heating chamber can be cleaned very easily. can.

(7) The door latch can be installed by making good use of the space between the right side of the exterior plate and the right side of the heating chamber. Unlike conventional methods, the door latch is limited to the lower part, which prevents the door from twisting and leaking radio waves. Since the position of the door latch can be freely set so that the switch does not turn off even when the door is turned off, it is possible to provide a high-frequency heating device with a safety device that prevents leakage of radio waves.

(8) Since the exterior plate 3 and the opening are sized to cover the door latch, internal light, and even electrical control parts, work efficiency in assembling and removing each part, wiring inspection, etc. is improved.

(9) Since the door latch and the interior light are located in the same side space and close together, the length of the wiring itself is shortened, reducing costs, and wiring work can be completed in the same direction, making it extremely convenient. This makes wiring work much better.

[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, FIG.
FIG. 3 is a cross-sectional view taken along line B-B' in FIG. 1 showing the main body of the heating device. 1... Front plate, 2... Back plate, 3... Exterior plate, 4...
...Heating chamber side wall, 5...Heating chamber, 6...Electric room, 7
...Interior lighting, 8...Punching holes, 9...Heat-resistant translucent thin film, 10...Metal fittings, 11...Door, 1
2...Door key, 13...Door key spring, 14...
...Switch, 15...Door hook, 16...Metal fittings, 17...Floor plate, 18...Saucer, 19...Motor, 20...Timer, 21...Opening, 22...
...Inspection window, 23...screws.

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 pivoted to open and close the front side of the opening of the heating chamber, and the side wall of the heating chamber is fixed to the top surface of the exterior plate, and the heating device is attached to them. A heating chamber formed by fixing the back plate and front plate of the main body, a bottom plate of the heating device main body fixed to both ends of the approximately U-shaped exterior plate of the heating device main body, and a safety device that is linked to the movement of the door. and,
It is equipped with an interior illumination light installed to make it easier to see the progress of the heated items, and an electrical room that houses electrical components such as a high-frequency generator. In the space formed by
A high-frequency heating device configured to include an electrical room and a safety device. 2. The high-frequency heating device according to claim 1, wherein an inspection window for the interior illumination light and the safety device is provided on the exterior plate facing the interior illumination light and the safety device. 3. The high-frequency heating device according to claim 1, wherein the inspection plate provided on the exterior plate of the electrical room is expanded and extended to serve as an interior lighting light and an inspection window for the safety device.