JPS6217537A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To prevent hazardousness due to leakage of electromagnetic wave or the like by a method wherein a hook, to be engaged with a door key, is provided at the substantially central position of peripheral rims of an opening at the front of a heating chamber to make a door difficult to be twisted even in case a force is applied on the upper end or the lower end of the door. CONSTITUTION:The door key 12 is supported pivotably by a pin 13 to make it pivotal into up-and-down direction and is energized by a spring 16 into up-and- down direction to abut the one end thereof against an operating section 15. The hook 17, retaining detachably the door key 12 in accordance with opening and closing of the door 11, is provided at the substantially central section of the peripheral rim section at the front opening in the heating chamber. Accordingly, the door becomes hard to be deformed even in case a twisting force is applied on the upper end or the lower end of the door to open it by gripping the upper or the lower end of the door 11 without gripping a handle 14. According to this method, it is hard to generate a gap between the door 11 and the front opening rim of the heating chamber 10 and danger due to leakage of electromagnetic wave may be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a safety device for high frequency heating equipment.

Conventional technology In recent years, high-frequency heating devices such as microwave ovens have become more compact, and the wall of the body of the heating chamber that stores food is used as part of the casing of the entire device, creating a so-called -layered structure.・High-frequency heating devices that are designed to increase energy consumption are emerging.

As shown in Fig. 4, this high-frequency heating device is equipped with a side-opening type door 2 that can be freely opened and closed at the front opening of a heating chamber 1, and a machine room 3 housing a power supply section and a main body at the bottom of the heating chamber 1. A control section 4 is provided to control the operation. A door key 5 is disposed on the lower end of the door 2 opposite to the fulcrum, and the door key 5
When it is closed, as shown in FIG. It is configured to be held by a catch part made up of a roller part 9 and a roller part 9.

Problems to be Solved by the Invention However, such high frequency heating devices have the following problems.

(1) The door key 5 is located at the lower end of the door 2 and the handle (
(not shown) is located at the upper end, the strength against torsion of the door 2 tends to be weakened, and when the upper end of the door 2 is pulled toward you, the upper end of the door 2 is placed in the heating chamber 1 before the micro switch 7 is turned off. It will float off the edge of the front opening, and there is a risk that radio waves will leak outside the heating chamber.

(2) When opening and closing the door 2, a force is applied to the main body 1a including the heating chamber 1 in the front and back direction, so if the main body is light, it is easy to slip when the door is opened and closed, making it difficult to use.

The present invention solves these conventional problems and provides a high-frequency heating device having a highly safe latch mechanism.

Means for Solving the Problems The high-frequency heating device of the present invention has a door key that rotates in the vertical direction, and a door that opens and closes the front opening of the heating chamber, and a door that opens and closes the front opening of the heating chamber, and a door that is located approximately at the center of the periphery of the front opening of the heating chamber. a hook portion located in the heating chamber and removably engaged with the door key;
A transmission part is provided which turns on/off a latch switch provided outside the heating chamber in conjunction with the door key.

Function: In the high-frequency heating device of the present invention, the hook portion for removably holding the door key is provided in the heating chamber at approximately the center of the front opening periphery of the heating chamber. The door is also more difficult to twist than before, and there is almost no risk of radio wave leakage.

Furthermore, since the door key rotates in the vertical direction, it is unlikely to slip or move when opening or closing the door, even if the main body of the device is light.

EXAMPLE Hereinafter, a high frequency heating device according to an example of the present invention will be explained with reference to the drawings.

As shown in FIGS. 1 to 3, the heating chamber 10 includes a front plate 27 having a front opening 2.9, a cylindrical body plate 2B, and a back plate 2.
3 and 3 are constructed by continuous winding around the peripheral edges of each body plate, and the body plate has a single-layer structure with the wall surface excluding the bottom surface also serving as the casing of the main body of the device. A front opening of the heating chamber 10 is provided with a door 11 that can be opened and closed to the left and right, and an L-shaped door key 12 made of a low dielectric material is pivotally supported by a pin 13 in the middle so that the door 11 can be opened and closed in the vertical direction. The pair of parts are rotatable and face an operating part 15 provided on the handle 14, and are urged downward by a spring 16 so that one end abuts against the operating part 15. A hook portion 17 made of a low dielectric material is provided at the peripheral edge of the front opening in the heating chamber 10, and the door key 12 extends into the heating chamber 10 through the opening 30 and is removably locked therein as the door 11 is opened and closed. As shown in FIG. 3, this hook portion 17 is provided approximately in the center of the front opening periphery of the heating chamber 10.Furthermore, inside the heating chamber 1o, there is a transmission conductor made of a low dielectric material. 18 (lever 18a1 shaft 18b), the lever 18a is provided with a shaft 19a integrally formed with a hook cover 19 made of a low dielectric material.
It is supported by a shaft. And the shaft 18b is connected to the saucer 20 (
2), and is held by the rail part 21 made of a low dielectric material and the bushing 20 provided on the back plate 10a of the heating chamber 10, and is operated by the lever 1811 and stored in the main body back plate 23. The microswitch 24 (switch of the power supply circuit of the high frequency oscillator) is configured to be turned on and off.

At the bottom of the heating chamber 10, a machine chamber 25 that houses a power source (a magnetron, a high-voltage transformer, etc., not shown) and a control section 26 that controls the main body of the high-frequency heating device are provided.

In the embodiment described above, when the door 11 is closed with the handle 14, the door key 12 is guided by the hook portion 17 and rotates upward temporarily, and when it gets over the hook portion 17, it rotates downward by the force of the spring 16, and the door key 12 is guided by the hook portion 17. engage with. Then, the lever 18a is rotated to the solid line position, the shaft 18b is set to the solid line position, and the microswitch 24 is closed. Operation unit 1
When the key 5 is pressed, the door key 12 is rotated and removed from the hook portion 17, the transmission portion 18 moves in the opposite direction, and the microswitch 24 opens. Then, the hook portion 17 is connected to the heating chamber 1.
If you accidentally try to open the closed door 11 using the upper or lower end of the door 11 instead of the handle 14, the door 11
Even if a torsional force is applied to the upper or lower end, it is less likely to deform, and therefore a gap is less likely to be formed between the door 11 and the front opening edge of the heating chamber 1o, eliminating the risk of radio wave leakage from the gap as in the conventional case. Sex also disappears. For this reason, door 11
There is no practical problem even if the thickness of the material constituting the material is reduced, and costs can also be reduced. Further, the door key 12 is configured to be rotated in the vertical direction by the operating portion 16 and the spring 16, so that the main body of the device does not move when the door is opened or closed. Furthermore, the hook part 17, the transmission part 18, etc. arranged inside the heating chamber are made of a low dielectric material, and even the microswitch operating mechanism installed inside the heating chamber 1o has almost no effect on the high-frequency electric field. Never give up.

The movable parts (door key 12, lever 18a, shaft 18b) located inside the heating chamber 10 are covered with the hook cover 19, the saucer 20, and the rail section 21, and are not directly exposed inside the heating chamber 10. Since it is not affected by water vapor or food waste generated from food, the reliability of the safety device is improved, and the usability of cleaning the heating chamber is not impaired.

Effects of the Invention As described above, the high-frequency heating device of the present invention has a hook portion that allows the door key to retract and retract from the front opening of the heating chamber, even if the heating chamber has a multi-layer structure. Since the door is located approximately in the center of the door, the door is not easily deformed even if a torsional force is applied to the upper or lower end of the door, and there is less risk of radio wave distortion, improving safety. Also,
The door key moves in the vertical direction when the door is opened and closed, and even if the device body is light, the device body moves less when the door is opened and closed, improving usability.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a main part of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a front sectional view of a main part of the same high-frequency heating device, and FIG. 3 is an external perspective view of the same high-frequency heating device. FIG. 4 is an external perspective view of a conventional high-frequency heating device, and FIG. 5 is a partially cutaway perspective view of the main part of the same high-frequency heating device. 1o... Heating chamber, 11... Door, 12...
・Door key, 17... hook part, 18... transmission part,
19... hook cover, 20... saucer, 21...
...Rail, 24...Micro switch. Name of agent: Patent attorney Toshi Nakao (1 person: 10)
-11-Riki0juken11-m-Door+2-1-)-A Key tQ--7 Tsukukanogu-2f-m-Rail 24-11 Micro switch Fig. 2 2θ-Saucer Fig. 4 Fig. 51 ]

Claims (3)

[Claims] (1) A heating chamber consisting of a front plate, a body plate, and a back plate, in which a part of the body plate also serves as a housing, a saucer provided in the heating chamber, and a door that opens and closes the front opening of the heating chamber; a door key that is pivotally supported by the door and is tensioned in one direction by a spring; a hook portion that is provided at the periphery of the front opening in the heating chamber and that allows the door key to protrude and retract to lock the door key in a detachable manner;
a hook cover that covers the hook part from inside the heating chamber;
A microswitch provided outside the heating chamber and the door key are operated to turn the microswitch ON/OFF.
a transmission section, wherein the hook section is provided approximately in the center of a peripheral edge of the front opening of the heating chamber, and the door key is configured to rotate in a vertical direction. (2) The high-frequency heating device according to claim 1, wherein the hook part and the transmission part are covered with either a hook cover, a saucer, or a rail part of the saucer so that they are not directly visible from inside the heating chamber. (3) The high-frequency heating device according to claim 1, wherein the door key, the hook portion, the transmission portion, the hook cover, the rail portion, and the saucer are made of a low dielectric material.