JPS60248924A - High-frequency heating apparatus - Google Patents

Abstract

PURPOSE:To obtain relatively large volumetric capacity for a heating chamber as compared with the whole size of an apparatus, and to obtain simple and streamlined outer looking thereof, by arranging knobs and a push buttons in the inside of a door, eliminating an operating face from the front side of controlling section on a front panel, and by constituting the door to enable to be operated only when the door is closed. CONSTITUTION:A timer knob 21 and a push-button 22 are positioned in the lower part of a metal framework 18, built in the thickness of a door. The timer knob 21 is pushed against the back of a door and the push-button 22 is against the front side of a door by compressed springs 23 and 24, respectively. There is a cross recession part, for example, on the back of a knob 21, so that it can be connected to the manipulating axis of rotation 25 of an electric timer which is provided to the front side of the controlling section of a front panel 1, and a cross projection part is provided to the side of an axis of rotation 25. When the door is closed, the know 21 is moved in some extent to the direction of the front side of a door by the axis of rotation 25 of a timer against the spring 23, so that the engagement of the grooves 26a and 27a are released and the timer can be rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a door in 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 significant constraints.

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 to set the heating time and a dial to set 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 most users usually wear cloth, 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 need to open to the left or the right, and depending on the opening/closing direction of the door, the door that covers the front of the heating chamber may need to be located on the left. I would argue if it is easy to operate, 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.

Cooking appliances with such a configuration have the disadvantage that they are extremely difficult to operate depending on the location where they are placed, and they often require a large installation space.

Recently, some devices have been seen that have alleviated the above drawbacks by locating the operating section at the top and bottom of the main body.

However, in this case as well, the outside Kfi of the box constituting the heating chamber
Most of them have a double-layered structure, covered with shingles. In other words, there is a gap of Klβ between the heating chamber and the outer shell material, and although it can be used as a place for installing heat insulating material, various mechanical parts, and connecting wires, etc., due to this gap, the main body 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 body due to installation space constraints, if a heating chamber volume that is equal to the external size can be secured, the capacity of the heated object will be increased by that amount, which will lead to a reduction in heating time. If a device 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. σ becomes proportionally small, and when the volume of the heating chamber is used as a reference, the external shape of the main body becomes large, which has the drawback of requiring a large installation area.

Furthermore, if there is no gap between the heating chamber and the outer shell, there is a problem that the hinge mechanism of the opening/closing door, the door catch, or the door opening/closing detection means essential to the high-frequency heating device vcU cannot be installed.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks.The heating chamber volume can be made extremely large compared to the external shape, the operation can be easily performed irrespective of the installation location, and the door structure can be opened and closed reliably. It is an object of the present invention to provide a high-frequency heating device that can also incorporate an opening/closing detection means and has an excellent appearance and design.

Structure of the Invention In order to achieve the above-mentioned object, the high-frequency heating device of the present invention has a casing portion consisting of a body plate which also serves as an outer shell material and whose upper surface and left and right side surfaces are formed from a single plate in a substantially U-shape, and the left and right side surfaces. It consists of a bottom plate provided in the middle of the body, a back plate, and a front plate having an opening for putting in and taking out the heated object and a control section front part at the bottom thereof, and the back plate and the front plate are placed in front and behind the body plate. join,
The horizontal plane of the bottom plate is aligned with the lower end of the front plate opening, and the upper part of the bottom plate is a heating chamber, and the lower part is a control part for storing a high-frequency generator and electrical parts for controlling heating, and the structure of the door part is is a front-opening door that integrally covers the opening of the front plate and the front surface of the control unit at the bottom thereof, the opening/closing fulcrum of the door is located at the lower end of the front plate, and the arm that can freely retract into the control unit is positioned from the opening/closing fulcrum. For manual operation of electrical components, knobs, push buttons, etc. are provided in the door, and there is no operation surface on the front surface K of the front panel control section, so that manual operation of electrical components is possible only when the door is closed. It is easy to operate regardless of the installation location, and the heating chamber volume is relatively large compared to the external shape, so the installation space can be reduced by that amount, and the opening and closing of the door is also independent of the installation location. It is easy to use, and has the advantage of being able to cover the entire front surface of the device body, resulting in a clean appearance.

DESCRIPTION OF THE EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings.C FIG. The bottom plate 5 is the main body floor plate.

The front plate 1 has an opening 6 for taking in and taking out the heated object, and a control section front section 7 below the opening 6. The back plate 2 has a waveguide on its back surface, and communicates the heating chamber 8 above the bottom plate 4 with the control section 9 below. The body plate 3 has an upper surface 1o and left and right side surfaces 11.12 formed in a substantially U-shape from one metal plate, and a heating chamber 8 and a control section 9 are provided on the bottom plate 4 between the left and right side surfaces 11.12. and separate. The front plate 1 and the back plate 2 are joined to the front and rear of the body plate 3, respectively, and the floor plate 5 on which electrical components are placed is housed in the control section from below the body plate 3 to complete the housing portion. FIG. 2 is a sectional view in an assembled state. In the figure, 13 is the door, 14 is the opening/closing fulcrum of the door, 15 is the swinging fulcrum of the arm, and 16
1'j arm, 17 getter.

A detailed sectional view of the door portion is shown in Figure 3. 18 in the figure
The metal frame of the door has a metal plate having a large number of small holes 19 that can look into the heating chamber 8 and also prevent leakage of high frequency waves, and has a frame portion having a leakage prevention mechanism around the periphery. . 20 is a cover made of transparent resin that covers the front surface of the door. The timer switch 21 and the push button 22 are connected to the metal frame 18.
It is located below the door and is embedded in the thickness of the door, both of which are supported by compression springs 23 and 24.
The timer knob 21Fi is pressed to the back side of the door, and the push button 22 is pressed to the front side of the door. Back side of knob 21 Kid
It has, for example, a cross-shaped recess so that it can be connected to the manual rotation shaft (25 in FIG. 2) of the electric timer provided on the front surface of the control unit of the front plate 1, and the VC on the side of the rotation shaft 25 has a cross-shaped protrusion. It is set up. The inner flange 26 of the handle 21 has a fine groove 261a on one side that serves as a seat for the spring 23 and extends radially in the circumferential direction on the back side.
7 is also provided with a similar groove 2T& opposite to this, and when the door is opened, this groove 26a is caused by the spring 23.

271L engages and locks the rotation of the knob 21.

When the door is closed, the rotary shaft 25 of the timer turns the knob 2
1 moves slightly toward the front of the door against the spring 23,
The grooves 264 and 271L are disengaged, allowing the timer to rotate. Since the pushbutton 22 does not restrict the direction of rotation, it is only necessary to move the door in the front and back directions.

According to the configuration of the embodiment as described above, the heating chamber 8 and the control section 9 are provided on the upper and lower sides of the bottom plate 4, respectively, and the front side of the control section 9 is the operation section, so that it can be accessed from the left and right at the installation location of the main body of the device. The door 13 opens from the front and is easy to open and close. In addition, since the body plate 3, which also serves as the outer shell material, has a single plate structure and the heating chamber 8 is inside, the volume of the heating chamber can be extremely large compared to the external dimensions of the main body, and the metal sample used can also be used compared to the conventional double structure. Since the weight can be reduced by half, the weight can be reduced, and since various electrical parts are arranged on the floor plate 5 and housed in the control section 9, the center of gravity can be lowered, allowing for stable installation and use.

The manually controlled electrical components in the control unit 9 can be operated using the knobs 21 and pushbuttons 22 built into the door 13.
(V), and these mechanisms are located outside the metal frame 18 that has high-frequency leakage prevention means, so there is no possibility of leakage, and the opening/closing hinge mechanism of the door 13 is also located on the front side of the control unit. 8. Effects of the Invention As described above, the present invention has the following effects: You can obtain the following effects.

1. Since the operating section is located at the bottom of the main body VC6 and the door opens from the front, it is always easy to operate regardless of where the main body is placed.

2. The outside of the left and right sides, back surface, and ceiling surface of the heating chamber form the outer shell of the main body, so there is no extra space, and the installation area and height can be small. Alternatively, if the installation space is the same as the conventional one, the volume of the heating chamber can be made extremely large, and the amount that can be heated at once can be increased, resulting in a reduction in heating time.

3. Because it has a single body plate structure, it is lighter than conventional ones, and because electrical components are stored below the main body, the center of gravity is lower, and the VCU is stable despite the weight reduction. It can be used with confidence.

4. Since the door extends to the front of the control unit and covers the entire front side of the device body, it is easy to install the opening/closing hinge mechanism, and an arm etc. can also be installed, allowing devices such as door opening/closing detection to be installed inside the control unit. It is possible to provide

5. The operating knobs, push buttons, etc. of the control parts are housed inside the door so that they can be operated when the door is closed, so the front surface of the door becomes neat and the appearance is excellent.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the casing of Embodiment 1 of the present invention;
The figures are a longitudinal sectional view of the main body and a sectional view of the third door. 1...Front plate, 2...Back plate, 3...
Body plate, 4...Bottom plate, 8...Heating chamber, 9.
- Control unit, 13...Door, 14...Opening/closing fulcrum, 21...Knob, 22...Push button. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2/65 Figure 3

Claims (3)

[Claims] (1) It has a door that can be opened and closed to integrally cover an opening for taking in and taking out the heated object and a control unit that controls the heating state, and an operation surface for operating electrical components in the control unit is provided in the door. . A high-frequency heating device configured to operate the electrical components only when the door is closed. (2) An electric timer for setting the heating time is installed in the control unit, with its manual rotation axis facing the front of the control unit, and a knob that can be connected to the rotation axis of the timer and rotated when the door is closed. 2. The high-frequency heating device according to claim 1, wherein a VC is provided in the door, and when the door is opened, the VC locks the rotation of the knob. (3) The main body of the thermal output switching switch is installed inside the control unit so that the operating device does not protrude from the front of the control unit,
Claim 1, wherein a push button mechanism is provided in the door so as not to protrude from both the front and back sides of the door, and the switch can be operated by the push button mechanism when the door is closed. high frequency heating device.