JPH02233910A - Microwave oven - Google Patents

Abstract

PURPOSE:To open a door safely by installing a latch switch to work in conjunction with the opening and closing of the door, a viscous mechanism part for the opening and closing of the door, and a lock mechanism part fully opening the door automatically. CONSTITUTION:When a pressure rod 13 is pushed lightly in the vertical direction P to open a door 5, a key 12 under the rod 13 is rotated to release a lock. When a lock mechanism part is released, the door 5 is started to move by a spring 10 and when it is fully opened to the last movable point, there is a possibility that a container is tilted or food-stuffs are split by the reaction of door movement force and therefore a viscous mechanism part using a gear- shaped oil damper and operated at the time of the opening and closing of the door is installed. At that time, if the door 5 is opened even slightly, the key 12 is off from a latch switch 14 to stop the oscillation of microwave. When the operation of closing the door by hand, the reaction force generated by the spring 10 is received, but this force is reserved by a lock mechanism as the energy to open the door next time. Thereby, the leakage of microwave can be prevented and also the door 5 is fully opened safely only when a user pushes the rod 13 lightly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to high frequency heating devices such as microwave ovens.

BACKGROUND ART An example of a conventional high frequency heating device is shown in FIG. In the example shown in FIG. 5a, the door 5 is opened and closed by grasping the handle 6 attached to 1R5. The arrow in the figure indicates the direction in which the user opens by hand. The example shown in FIG. 5b is provided with a mechanism that opens the door 5 when a lever 7 provided on the side of the door 5 is pushed strongly. This opening/closing method is valid under the condition that the weight of the wooden body 9 is generally less than 10 kg.

Furthermore, when the door 5 is closed and heating is in progress, R5 must be tightly closed to prevent high-frequency leakage, so strong stress is applied to keep the door 5 in close contact with the heating chamber 8. There is.

In recent years, with the spread of small models in microwave ovens, [i1
! Technological innovations such as the miniaturization of transformers and the use of plastic structural materials have led to significant weight reductions, with lighter models now weighing around 5kg.

If you try to open the R5 in such a lightweight model, the entire microwave oven will be dragged or subjected to strong vibrations because the wooden body 9 is light. Therefore, as shown by the two arrows in Fig. 5C, the container body 9 must be supported with one hand and the handle 6 must be grasped to open and close it. Invention tries to solve! However, when closing the door 5, this is not a big problem except that it is not easy to use, but if the door 5 is carelessly opened without supporting it with one hand after cooking, hot liquid food may spill and safety may be compromised. There were even problems related to this. This is because the door 5 is difficult to open, but the door 5 still needs to be in close contact with the heating chamber 8 due to high frequency leakage.
If the handle 6 opens simply by pulling it lightly, there will be a new risk of leakage. Therefore, the present invention is intended to solve such conventional problems, and a first object thereof is to provide a high-frequency heating device that allows the door to be opened safely regardless of the weight of the container body.

The second objective is to provide a high-frequency heating device that not only allows the door to be opened safely, but also allows the user to close the door without applying excessive force during the closing process. A third object is to provide a high-frequency heating device that allows a user to easily close the door regardless of the weight of the container body.

Means for Solving the Problems Therefore, in order to achieve the first object, the high frequency heating device of the present invention comprises a vessel body, a high frequency heating means, a heating chamber, a door, a latch inch interlocked with the door, Equipped with a viscous i structure that opens and closes the door with viscosity, retains the energy needed to fully open the screen when the door is closed, and applies an external force to one location that makes it impossible to fully open the door. It is equipped with a locking mechanism that releases energy and automatically opens the door fully. In addition, in order to achieve the second object, the high-frequency heating device of the present invention includes a main body, a high-frequency heating means, a heating chamber, a door, a latch switch interlocked with the door, and a viscous latch switch that opens and closes the door with viscosity. The mechanical part retains the energy needed to fully open the door when the door is closed, and when the door is opened, an external force that cannot fully open the door is applied to one location, releasing the energy and automatically opening the door. It is equipped with a locking mechanism that opens the door fully, and is also equipped with a mechanism that prevents the viscous mechanism from acting while the door is closing. In addition, in order to achieve the third object, the high-frequency heating device of the present invention includes a main body, a high-frequency heating means, a heating chamber and a door, a latch switch that interlocks with the door, and a door that connects the door during closing. It is equipped with a mechanism that automatically closes when the angle formed by the heating chamber reaches a predetermined angle. Function The high-frequency heating device of the present invention stores the object to be heated in the heating chamber inside the main body and heats it with the high-frequency heating means.The door of the heating chamber is closed when storing and taking out the object to be heated. It is necessary to open and close it. When the door opens and closes, a viscous mechanism operates to open and close the door with viscosity.

The latch switch is a safety device that is linked to the opening and closing of the door and sends a signal to the control circuit to activate the high-frequency heating means only when the door is completely closed.

When the door is closed, a groove is activated to store enough mechanical energy to fully open the door the next time, and this mechanism allows the user to release that mechanical energy by simply applying a minute external force to one location. 8 to fully open the door! He also has Noh. This locking mechanism allows the user to easily open the door, and the aforementioned viscous mechanism automatically opens and closes slowly and smoothly.
These configurations prevent accidents such as spilling of heated items due to the reaction of opening the door after cooking, for example.
Users can open the door safely and with peace of mind. In addition, in the case of a high-frequency heating device that has a mechanism that prevents the viscous mechanism from acting during the door closing process, it is possible to use a high-frequency heating device that has a mechanism that prevents the viscous mechanism from acting on the door when the user closes the door. The door will no longer be difficult to close.

In addition, if the door is equipped with a mechanism that automatically closes when the angle between the door and the heating chamber reaches a predetermined angle while the door is opening, the door will close even if the user lets go of the door as long as the user closes the door to the predetermined angle. Since it automatically moves toward closure, it is easy and convenient to use. EXAMPLE Hereinafter, a microwave oven according to an example of the high-frequency heating device of the present invention will be described with reference to the drawings.

Example 1 FIG. 1 shows a schematic diagram of the mechanism. In order to open the door 5, the user only needs to lightly press the pressure rod 13 in the vertical direction as indicated by the arrow P.

When the door 5 is closed, the key 12 located below the pressure bar 13 rotates when the pressure bar 13 is pressed.
The lock is released. The locking mechanism consists of a pressurizing rod l3 slidably provided on the main body 9 and a fulcrum 12a on the door 5.
The key 12 is rotatably provided through the door 5, the tension spring 1l maintains the key 12 so as to protrude from the door 5 at right angles, and the engaged body 9 of the container body 9 with which the key 12 is removably engaged. The key is configured to hang on the engaged portion 9a of the main body 9 during locking. This locking mechanism brings the door 5 and the container body 9 into close contact with each other to prevent high frequency leakage. Further, the latch switch 14 is activated only when the key l2 is engaged with the engaged portion 9a of the wooden body 9.
Electrically suppress i2I so that it is pressed by and oscillates a high frequency.
It is for the purpose of In other words, if the door 5 is opened even slightly, the key 12 is separated from the latch switch 14 and the oscillation is stopped.

When the locking mechanism is released, the door 5 starts to move due to the spring lO which always applies force in the direction of opening the door 5. If the i5 were to fully open to its final movable point, the force would create a large recoil, and if food was stored there was a possibility that the container would topple over and the food would spill. Therefore,
A viscous mechanism section that operates when the door 5 is opened and closed is provided.

There are several devices that can be used to increase viscosity, but in this example, a gear-shaped oil damper was used. This viscous gear l applies viscosity to rotational motion. Rack 3 extending from yR5 is pressed against gear 2 by spring 4. The linear movement of the rack 3 is converted into a rotational movement by the gear 2, which is transmitted to the viscous gear 1 described above. The action of the viscous mechanism made up of these allows the door 5 to be opened and closed smoothly, slowly and quietly. The opening speed of the door 5 can be freely designed by selecting the viscosity or spring reaction force. In this example, the speed was set based on the balance between the weights of the door 5 and the main body 9. Further, the operation of closing the door 5 is performed manually. At this time, spring 1
0, but this reaction force is retained by the lock mechanism as energy for opening the door 5 next time.

In this way, while satisfying the condition of preventing high-frequency leakage, the door 5 will open automatically when the user lightly presses the pressure rod l3, and the heated food will be placed in an unstable container. Even if someone is inside, the door 5 can be fully opened safely. The opening process is quiet and smooth, so the user can operate it with peace of mind, and the reaction of opening the door 5 does not cause any vibration to the object to be heated. These effects can be obtained in the same way regardless of the weight of the container body 9 or the door 5 by simply selecting the viscosity and spring reaction force for each model.

Next, the embodiment shown inside circle A in FIG. 1 will be explained. In this embodiment, the pressure rod 13 can be electrically moved by connecting a part of the pressure rod 13 to the movable part of the solenoid 15. Since the solenoid 15 is controlled by a microcomputer, if the microcomputer determines that the door 5 should be opened, the user can open the door 5 without touching it at all.

Figure 2 shows the microwave oven of this example stored in the special storage furniture. This special storage furniture is part of the system cabinet, and the microwave storage part also has the same appearance as the surrounding area due to the second door l9. The microwave oven is fixed to the zero body 16. A door latch 17 attached to the main body 16 is turned ON/OFF by opening/closing the second door 19.
When the second [19 is opened, the cable 2 from the door latch 17
0, a signal is sent to the microcomputer of the microwave oven, and the microcomputer operates the solenoid 15 shown in Figure 1 to automatically open the door 5. By doing so, when the user uses the microwave oven, the door 5 of the microwave oven automatically opens by the operation of opening the second door 19, thereby improving usability. Furthermore, considering the usage situation, detailed control was performed using a microcomputer such that the door 5 would not open even if the second door 19 was opened during heating. Furthermore, when the user sends an electrical signal to the microcomputer using the electrical switch 18, the door 5 opens in the same way.
Controlling the opening of the door 5 using electric signals in this manner is very advantageous in developing a system including a microwave oven.

Embodiment 2 In the next embodiment, the viscous mechanism does not operate during the closing process of the door 5. The purpose of this is to close the door 5 with a light force, but considering the simplest configuration, the rack 3 and gear 2 shown in Fig. 1 may be shaped as shown in Fig. 3-a. The teeth only engage when door 5 is opened.

However, in this example, noise is generated when the teeth do not engage, so the embodiment shown in Fig. 3-b will be described. In this example, a viscous roller 22 corresponds to the viscous gear 1 in FIG. 1, a roller 23 corresponds to the gear 2, and a rack 3.
It is equipped with an arm 24 corresponding to . These contact surfaces are covered with rubber for non-slip and quiet movement.

The viscous roller 22 is mounted on a lever 25, and the lever 25 is movable around a fulcrum 27 fixed to the vessel main body 9. The shaft 21 of the viscous roller 22 is constantly under pressure from a spring 26, as shown by circle B in the figure. Therefore, the shaft 21, the viscous roller 22, and the lever 25 do not move about the fulcrum 27 unless a predetermined force is applied. When the door 5 is completely closed, the upper part of the lever 25 is pressed by the key l2, and the pressure of the spring 26 fixes the viscous roller 22 and the roller 23 in contact with each other. When the door is completely opened, the end of arm 7-24 will be connected to lever 2.
5, and the viscous roller 22 and roller 23 are fixed in a state where they are not in contact with each other.

With this mechanism, the viscous roller 22 does not work when closing the door, and the user can smoothly close the door 5. Note that if the viscosity of the viscous gear I or the viscous roller 22 acts only in one of the rotational directions, this mechanism is of course unnecessary and the same effect can be obtained with a simple configuration. Embodiment 3 The next embodiment shown in Figure 4-a allows the door to be closed even more easily. In this embodiment, when the user closes the fully opened door 5 to a certain predetermined angle, R5 automatically moves from then on until it is completely closed.

Energy for automatically closing m5 is obtained from motor 2B. The motor 28 is controlled by a microcomputer.
The activation command is obtained from a signal from a second latch switch 29 fixed to the main body 9. Specifically, the process is as follows. When the door 5 is fully opened, the arm 24 is in contact with the second latch switch 29, but when the user makes an action to close the door 5, the arm 24 is in contact with the second latch switch 29.
4 is separated and an electrical signal is sent to the microcontroller. The microcomputer receives this and starts the motor 28. Since the output shaft of the motor 28 is integrated with the roller 23, the door 5 is automatically closed. When the door 5 is completely closed, a signal is sent to the latch switch 14 color microcomputer, and the microcomputer stops the motor 28. In addition, in Fig. 4-a, the door 5 is automatically closed if the user makes even the slightest movement to close it, but as shown in Fig. 4-b, the second latch switch 29 is attached to the movable part 30. Once installed, it becomes possible to design the door 5 to automatically close from a predetermined angle. Since the movable part 30 is pulled by a spring 30a as shown in the figure, it moves to its movable end in accordance with the movement of the arm 24, and the second latch switch 29 emits a signal at the next point in time. These configurations allow the user to open and close the door 5 safely and conveniently.

Effects of the Invention As described above, in the high frequency heating device of claim (1), the following effects can be obtained.

(1) Due to the functions of the locking mechanism and the viscous mechanism,
When the user applies a small amount of force in one place, the door of the heating chamber will automatically slowly open fully to the movable end.
Since the door can be opened easily, the vibration generated when the user opens the door prevents hot objects from spilling out and causing an accident.

(2) The opening process is quiet and smooth due to the viscous mechanism, allowing the user to operate with confidence. (3) During heating, the lock mechanism keeps the door in close contact with the heating chamber, eliminating the risk of high-frequency wave leakage. Furthermore, if the door opens even slightly, high-frequency oscillation is stopped by the latch switch signal, making it safe. It is.

(4) The effects of (+) (2) and (3) above can be achieved by simply selecting the viscosity and spring reaction force of the viscous mechanism and lock mechanism for each model, regardless of the weight of the main body or door. This is extremely advantageous in practice.

Moreover, in the high frequency heating device of claim (2), the following effects can be obtained.

(1) Due to the functions of the locking mechanism and the viscous mechanism,
When the user applies a small amount of force in one place, the door of the heating chamber will automatically slowly open fully to the movable end.
Since the door can be opened easily, the vibration generated when the user opens the door prevents hot objects from spilling out and causing an accident.

(2) Viscosity 8! ! The opening process is quiet and smooth due to the side parts, so you can operate it with peace of mind.

(3) During heating, the lock mechanism keeps the door in close contact with the heating chamber, eliminating the risk of high-frequency wave leakage. Furthermore, if the door opens even slightly, high-frequency oscillation is stopped by the latch switch signal, making it safe. It is.

(4) The effects of (1), (2), and (3) above can be achieved by simply selecting the viscosity and spring reaction force of the viscous mechanism and lock mechanism for each model, regardless of the weight of the main body or door. This is extremely advantageous in practice.

(5) Since the door is equipped with a mechanism that does not act on the viscous mechanism during closing, the user can close the door without using extra force against the viscous mechanism. Moreover, in the high frequency heating device of claim (3), the following effects can be obtained. (1) During heating, the lock mechanism keeps the door in close contact with the heating chamber, eliminating the risk of high-frequency wave leakage. Furthermore, if the door opens even slightly, high-frequency oscillation is stopped by the latch switch signal, making it safe. It is. (2) If the door is equipped with a mechanism that automatically closes it when it closes to a predetermined angle during closing, the user can release his/her hand after the predetermined angle, making it extremely easy to use. A high frequency heating device can be realized.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing the mechanism of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is an external view of the embodiment of the present invention, and FIG. A schematic side view of the mechanism section, FIG. 3A is an enlarged side view of the main part of FIG. 3B, FIG. 4A is a schematic side view of the mechanism section in the third embodiment of the present invention, FIG. The figure is a side view of a main part of a fourth embodiment of the present invention, and FIG. 5 is a perspective view showing how to use a conventional high-frequency heating device. 1... Viscous gear, 3... Rank, 5.
... Door, 6 ... Handle, 7 ... Lever, 8 ... Heating chamber, 9 ... Main body, 12 ... ... Key, 13 ... Pressure rod, 1
4... Latch switch, 15... Solenoid, 19... Second door, 22...
Viscous roller, 28...Motor, 29...
...Second latch switch. Agent's name Patent attorney Shigetaka Awano Name 17-
Door latch 18--Swi・νchi 191 rate=door κ-Gural 3-a figure $3-Le102 ・- 3 −・− 21 −・− n− 24−・1n・− Car trunk opening 11m numeral 4-a diagram ψ-re figure 1 latch switch 1 〇-ra- 4--1 straw 2-5 switch ηchi figure 5--1 door 6 111 hand 91 Dairy salary $ body

Claims (3)

[Claims] (1) A main body, a heating chamber, a high-frequency heating means coupled to the heating chamber, a door of the heating chamber, a latch switch that is linked to opening and closing of the door, and the door opens and closes with viscosity. When the door is closed, the viscous mechanism part retains the energy to fully open the door, and when the door is opened, the energy is released by applying an external force that makes it impossible to fully open the door. A high-frequency heating device comprising a locking mechanism that automatically fully opens the door. (2) A main body, a heating chamber, a high-frequency heating means coupled to the heating chamber, a door of the heating chamber, a latch switch that is linked to opening and closing of the door, and the door opens and closes with viscosity. When the door is closed, the viscous mechanism part retains the energy to fully open the door, and when the door is opened, the energy is released by applying an external force that makes it impossible to fully open the door. A high-frequency heating device comprising: a locking mechanism that automatically fully opens the door; and a mechanism that prevents the viscous mechanism from acting during closing of the door. (3) a main body, a heating chamber, a high-frequency heating means coupled to the heating chamber, a door of the heating chamber, a latch switch that is linked to opening and closing of the door, and during closing of the door, A high-frequency heating device configured to include a mechanism that automatically closes when the angle between the door and the heating chamber reaches a predetermined angle.