JPS6086331A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To lighten the operating force of a cooking beginning means by a constitution wherein a door key holding means, a switch operating means and the like are pivoted about one supporting point and the door key holding means, the switch operating means and the mounting part of a switch are constituted by the same component. CONSTITUTION:The titled device is equipped with the cooking beginning means 13, provided operably at the side of a main body, the switch operating means 29, pivoted by the door key 21 and the means 13 and operating the switch 16a, 16b, and the door key holding means 31, holding the means 29 so as not to operate the switch until the means is operated when a door 7 is closed. When the door 7 is closed, the door key 21 is engaged with locking means 26, 28 and the means 13 is operated, the means 29 is pivoted to operate the switch which controls the opening and closing of an electric source circuit whereby the supply of electric power to the high-frequency heating chamber 4 is started. As a result, the operating force of the cooking beginning means may be lightened and malfunction of the same means may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a safety device for high frequency heating devices such as so-called microwave ovens.

Configuration of conventional examples and their problems Conventionally, there have been high-frequency heating devices of this type in which the switch activation means is unlocked and cooking starts by operating the cooking start button. Since the switch was constructed so that the means slid to operate the switch, the sliding force required to move the switch actuating means was large, and malfunctions were likely to occur.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and an object thereof is to provide a high-frequency heating device having a cooking starting mechanism that reduces the operating force of the cooking starting means, does not cause malfunction, and has a light touch. shall be.

Structure of the Invention In order to achieve the above object, the high frequency heating device of the present invention has a cooking start means consisting of a cooking start button and an operating lever, a switch actuating means, and a door key holding means. is a mechanism that rotates around a fulcrum, and the door key holding means, switch actuating means, and switch mounting portion are constructed from the same parts.

Therefore, the operating force of the switch actuating means is lighter than before, and there is less variation in the positional relationship between the door key holding means, the switch actuating means, and the switch, so it can be operated with light force and has a safe cooking start mechanism that does not malfunction. This has the effect of providing a high frequency heating device.

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

FIGS. 1 and 2 are diagrams showing the configuration of a high-frequency heating device, in which a high-frequency oscillator 1 that oscillates microwaves of 2450 MHz is coupled to a metal waveguide 2 and an antenna 3. The high frequency wave radiated from the high frequency oscillator 1 into the waveguide 2 propagates inside the waveguide 2 and is further radiated into the heating chamber 4 . The high frequency waves radiated into the heating chamber 4 are absorbed by the food 5 placed in the heating chamber 4, and dielectrically heat the food 5 from inside the food 5. Furthermore, the high frequency oscillator 1 is self-heated due to internal loss, and is constantly cooled by the blower fan 6 during oscillation to prevent failure. When the door is closed, the door engages with the locking mechanism on the main body side, and the heating chamber 4
A door 7 that can be opened and closed has a door key 21 for operating a switch operating means (to be described later) on the front side of the heating chamber, and an electrical parts chamber 8 is located on the side of the heating chamber, including a high-frequency oscillator 1, a blower fan 6, and a high-voltage oscillator. High 5 for applying
A voltage transformer 9 and a high voltage capacitor 10 are located.

An operation panel 11 is constructed on the front side of the electrical parts room, and includes a timer knob 12, a cooking start button 13, and the like.

Figure 3 shows the control circuit of the high-frequency heating device, and the power plug 14 is short-circuited to prevent short-circuiting of the electrical components that make up the high-frequency heating device, a ground fault, and excessive leakage of microwaves when welding the interlock described later. It is connected to the fuse 15 which is blown by the operation of the switch 18. Furthermore, the fuse 15 is connected to the primary winding of the high voltage transformer 9 via a switch 16 (hereinafter referred to as an interlock switch) 16 and a time switch 17, which control the opening and closing of two power supply circuits whose contacts open and close when the door 7 is opened and closed. .

A blower 7 is installed at both ends of the primary winding of the high voltage transformer 9.
A short switch 18 that makes the entire circuit inoperable when the interlock switch 16 is welded, a timer motor 19 that operates the time switch 17, and a lamp 20 that illuminates the inside of the heating chamber 4 are connected. . The other terminal of the power propeller plug 14 is connected to the primary winding of the high voltage transformer 9.

The AC power applied to the high voltage transformer 9 is
The high-voltage power is stepped up and becomes high-voltage power, and the high-voltage power is converted into high-voltage DC power that is voltage-doubled and rectified by a voltage-doubler rectifier circuit composed of a high-voltage capacitor 1o and a high-voltage diode 22, and is supplied to the high-voltage oscillator 1. High frequency oscillator 1
The high-voltage DC power supplied to the high-voltage transformer 9 heats the heater of the high-frequency oscillator 1 by the heater winding 24, converting it into high-frequency waves, which are radiated from the antenna 3 and used to control the food being cooked as described above. Heat.

FIG. 4 is a structural diagram of the door 7, which is provided with door keys 21 arranged at upper and lower sides, a connecting rod 23 connecting the two door keys, a door release button 24, and a door spring 25. Each door key 21 is engaged with a door locking means, which will be described later, by applying a rightward moment around a fulcrum by a door spring and a connecting rod. To unlock the door, press the door release button 2
This is done by applying a leftward moment to the door key 21 using the 47-beam.

FIG. 5 shows the relationship among the door, door lock means, and cooking start structure. The door key 21 at the upper part of the door engages with the door lock means (upper) 26, and when the door key 21 is inserted, the above-mentioned interlock switch 16a is activated by pushing the switch lever 27 by the force of the door spring via the connecting rod 23. Turn on. The door key at the bottom of the door engages with the door locking means (lower) 28, and the door locking means/
(Bottom) shows a door key engaging part 30, a switch operating means 29 having a fulcrum on the door locking means body, a door key holding means 31, a short switch 18 and an interlock switch 16b1 attached to the door locking means body, and a short switch 16b1 for operating the short switch 18. The short switch actuating lever 32 consists of a short switch actuating lever 32. Also, switch actuation means 2
9 and the door key holding means 31 are engaged with each other, and a force to the left is applied to the door key holding means 31 by the restoring spring a3.

FIG. 6 is a diagram showing the relationship between the cooking start button 13, the operating lever 34, and the door key holding means 31. When the cooking start button 13 is pressed, the operating lever 34 rotates around the fulcrum, and the door key holding means 31 rotates around the fulcrum. It is configured to rotate around .

FIGS. 7 and 8 explain the configuration and operation of starting cooking according to the present invention, and the operation of starting cooking will be described below using the above-mentioned figures and FIG. 5.

FIG. 7 shows the state when the door 7 is open, and the door key holding means 31 is in the resting state, that is, the state in which the door switch actuating means 29 is held by the restoring spring 33. Therefore, the interlock switch 16b is turned OFF.
It is in F state.

FIG. 7 shows the state when the door 7 is closed, the short switch operating lever 32 is pushed by the door key 21, the short switch is operated, and the door switch operating means 29 is pushed.
Although a force is applied to turn the interlock switch 16b ON, the door switch operating means 29 is held by the door key holding means 31, and the interlock switch 16b9 continues to be in the OFF state.

When the cooking start button 13 is further pressed, the door key holding means 31 is rotated via the operating lever as described above, the door switch actuating means 29 is disengaged, the door switch actuating means 29 is rotated, and the interlock switch 16b is rotated.
turns on and the high-frequency heating device starts cooking.

As described above, according to this embodiment, the operating lever, the door key holding means, and the switch actuating means are configured to rotate around the fulcrum, realizing a cooking start mechanism with a light touch. By configuring it as the same part as the switch mounting part, it is possible to realize a cooking start mechanism in which there is no variation in the interrelationship between the switch, the switch actuating means, and the door key holding means 31, and there is no malfunction.

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

11) High frequency generator 1 with a light touch cooking start mechanism
0pe ・Heat equipment can be provided.

(2) It is possible to provide a high-frequency heating device that has a highly reliable and safe cooking start mechanism that does not malfunction.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main body of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same, FIG. 3 is a circuit diagram of the same, and FIG.
5 is a side view of the cooking start mechanism of the invention, FIG. 6 is a perspective view showing the relationship between the cooking start button and door key holding means, and FIGS. FIG. 8 is a diagram illustrating the operation of the cooking start mechanism, and is an explanatory diagram showing the relationship between the position of the door key holding means, the switch actuating means, and the interlock switch. DESCRIPTION OF SYMBOLS 1... High frequency oscillator, 7... Door, 13 Cooking start button, 16... Interlock switch, 21... Door key, 26... Door lock means (top), 28...
Door opening means (lower), 29 Switch actuation means, 31
... Door key holding means, 34... Operation lever. Name of agent: Patent attorney Toshio Nakao and one other person
N (\\0 0ki\ Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Old L I

Claims (3)

[Claims] (1) A heating chamber that stores food, a high-frequency oscillator that supplies high-frequency power to the heating chamber, a door that can be opened and closed at the front of the heating chamber, and a door that is attached to the door and provided on the main body side when the door is closed. A door key that engages with the locking means, a switch that controls opening and closing of the power supply circuit of the high frequency oscillator, a cooking start means that is operable on the main body side, and a door key that rotates about a fulcrum by the door key and the cooking start means. a switch operating means for operating the switch; and a door key holding means for holding the switch so that the switch operating means does not operate the switch until the cooking start means is operated when the door is closed; When the door key is engaged with the locking means and the cooking start means is operated, the switch actuating means rotates and operates the switch for controlling opening/closing of the power supply circuit. ,−,. A high-frequency heating device configured to start power supply. (2) The high-frequency heating device according to claim 1, wherein the operating lever, which is a part of the switch actuating means, the door key holding means, and the cooking starting means, is configured to rotate around a fulcrum. (3) The high-frequency heating device according to claim 1, wherein the fulcrum of the switch operating means, the fulcrum of the door key holding means, and the switch mounting portion for controlling opening/closing of the power supply circuit are constructed from the same part.