JPH04138687A - Microwave oven - Google Patents

Abstract

PURPOSE:To thin the door of a microwave oven so as to enlarge the range wherein the inside of the microwave oven can be seen through the door by providing a chalk structural body around the peripheral edge of the opening of a main body, and providing such structure that when the door is opened or closed a drive means winds and rewinds a metallic plate via a winding drum. CONSTITUTION:A chalk structural body 12 is provided around the peripheral edge of the opening of a main body 10 to cover the end face of a metallic plate through which numerous small holes are bored and also make the metallic plate freely slidable. When a material for cooking is put in the main body 10 and a door 11 is closed, a winding drum 16 rewinds the metallic plate 13 using a drive means 17 and a switch 20 is pushed by the end face of the metallic plate 13 and then the drive of the drum 16 is stopped and electricity is transmitted to an electric wave supply source 14 so that cooking is performed. The door 11 is opened after cooking and then the contact of a door switch 18 is changed and the drive means 17 is actuated so that the drum 16 winds the metallic plate. Thereby the door can be thinned and made lightweight so as to enlarge the range wherein the inside of a microwave oven can be seen through the door.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a microwave oven equipped with a thin door.

Conventional technology In recent years, microwave ovens have become widely used, and they have been designed to make it easier to see the food inside the oven while cooking, and to make the door thinner and lighter, making it easier to open and close the door. It is strongly desired that this be done.

Conventional microwave ovens generally have configurations as shown in FIGS. 6 and 7.

The configuration will be described below with reference to the drawings.

As shown in the figure, the microwave oven includes a main body 1 into which food is placed and cooked, and a tftt supply fI built into the main body 1! (
(not shown) and a door 2 that covers the front opening of the main body 1, and the door 2 includes an outer frame 3. Inner glass 4 External glass 5. and a radio wave shielding body 6, etc. The radio wave shielding body 6 is made up of a chalk structure 7 sandwiched between the outer frame 3 and a metal plate 8 such as transparent punching metal having many small holes, and serves as a radio wave supply source when cooking. It is shielded to prevent radio waves from leaking outside.

Problems to be Solved by the Invention As described above, in the above-mentioned conventional microwave oven, the outer frame 3 of the door 2
Since the choke structure 7 is provided in the door, the outer frame 3 needs to be thick, and the entire door 2 is therefore thick and heavy.Moreover, since the area of the inner glass 4 and the outer glass 5 cannot be increased, the transparent part becomes narrow. However, there were problems such as the range in which the food placed inside could be seen was narrowed.

The present invention solves the above-mentioned problems, and aims to provide a microwave oven that has a thinner door to reduce weight and a wider transparent part of the door to make it easier to check the food to be cooked. .

Means for Solving the Problems In order to achieve the above object, the present invention provides a microwave oven as a first means for solving the problems, which includes a built-in radio wave supply source and has an opening to accommodate food to be cooked. A main body, a door that covers the opening of the main body so as to be openable and closable, a metal plate disposed in the opening of the main body and having a large number of small holes and shielding radio waves, and a metal plate provided around the opening of the main body, and a choke structure that covers an end surface of the metal plate, and a winding device that is provided at the end of the opening of the main body and winds up the metal plate, and the winding device winds up the metal plate by opening and closing the door. As a second means of solving the problem, a heater is installed in the winding drum of the winding device, and a switch is installed to turn on the heater after winding up the metal plate. be.

Function The function of the first problem solving means described above is that the metal plate for shielding radio waves and the choke structure are provided at the opening on the main body side, so there is no need to provide a choke structure on the door side. The function of the problem solving means is that when dirt adheres to the metal plate, the selector switch is turned to wind up the metal plate, and then the heater is energized to incinerate the dirt on the metal plate wound on the winding drum.

EXAMPLE Below, FIG. 1, FIG. 2, and FIG.
This will be explained with reference to FIGS. 4 and 5.

As shown in the figure, the microwave oven consists of a main body lO and a door 11, and a choke structure 12 is provided around the opening of the main body 10.
A radio wave shielding body made of a metal plate 13 is provided to cover the opening, so as to block radio waves radiated from the radio wave supply source 14. The metal plate 13 has a thickness of 0.1-
It is made of a stainless steel plate with a large number of small holes having an inner diameter of about 1.5 m, and its end face is covered with a choke structure 12 and is slidable. At the top of the opening of the main body 10 is a storage section 1 in which the metal plate 13 is rolled up and stored.
5, and is wound up or rewound by a winding device 18 comprising a winding drum 16 and a driving means 17.

A door switch 19 is provided above the opening, and the contacts of the door switch 19 are switched in conjunction with the opening and closing of the door 11 to operate and stop the drive means 17. Further, a switch 2 is provided at the bottom of the choke structure 12.
When set to 0, when the metal plate 13 is lowered and covered by the choke structure 12, the switch 20 is pressed to stop the driving means 17 and energize the radio wave supply fi14.

Furthermore, the door 11 consists of an outer frame 21 and a glass 22, and the outer frame 2
1 does not have the choke structure weight 2 attached as in the conventional case, and maximizes the area of the glass 220.

To explain the operation in the above configuration, when the food to be cooked is put into the main body 10 and the door 11 is closed, the door switch 19 is switched, the driving means 17 is operated, the winding drum 16 rewinds the metal plate 13, and the metal When the plate 13 descends to the lowest position, the metal plate 13 is covered by the choke structure 12, and by pressing the switch 20 at the end of the metal plate 13, the driving means 17 is stopped and the radio wave supply source 14 is energized. The food is then cooked. When the cooking is finished and the radio wave source 14 is stopped and the door 11 is opened, the contacts of the door switch 18 are switched, the driving means 17 is activated, the metal plate 13 is rolled up by the drum 16, and the main body 10
It becomes possible to take out and take out the food to be cooked inside. As described above, according to the microwave oven of the embodiment, the choke structure 12 is connected to the main body 1.
Since the area of the glass 22 of the door 11 can be maximized, the transparent part of the door 11 can be widened to make it easier to check the food to be cooked.

4 and 5 are diagrams showing other embodiments of the present invention, in which a heater 23 is provided in the winding drum 16, and the heater 23 is energized by a power changeover switch 24 to It is unique in that it incinerates the filth that has accumulated in the area.

That is, a heater 23 is provided on the axis of the winding drum 16, and a heater terminal 25 is connected to a changeover switch 24. The changeover switch 24 is used to switch between the driving means 17 and the heater 23, and after winding up the metal plate 13 onto the winding drum 16, the heater 23 is energized to incinerate the accumulated dirt. Therefore, when the metal plate 13 becomes dirty and the small hole is blocked after long-term use, the heater 2
3, by incinerating the waste, the food to be cooked can be checked at all times, and cleaning is extremely easy.

Although punching metal is used for the metal plate 13 in this embodiment, the same effect can be obtained by using a stainless steel mesh or a lath mesh.

Effects of the Invention As is clear from the above description of the embodiments, the present invention includes a main body that incorporates a radio wave supply source and has an opening to accommodate food to be cooked, and an opening of the main body that can be opened and closed. A door to cover,
A metal plate arranged to block the opening and having a large number of small holes to shield radio waves, and a choke structure provided around the opening and covering an end of the metal plate, A winding device for winding up the metal plate is provided at the end of the opening of the main body, and this winding device winds up and unwinds the metal plate by opening and closing the door, thereby making the door thinner and lighter. It has significant practical value, as it can enlarge the visible area of the door, making it easier to check the food inside, and making it easier to use.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a microwave oven according to an embodiment of the present invention, Fig. 2 is a plan view of a metal plate of the microwave oven, Fig. 3 is an external perspective view of the microwave oven, and Fig. 4 is an embodiment of the present invention. 5 is a circuit diagram of the microwave oven, FIG. 6 is an external perspective view of the conventional microwave oven, and 7V is the door of the microwave oven. FIG. lO...Body, 11...Door, 12.
...Choke structure, 13...Metal plate,
14... Radio wave supply source, 18... Winding device. Name of agent: Patent attorney Akira Kokaji and 22 others
Palpitation “Ako 2 2 aL Buddha 1 Zhu Shube Shiri Lead Map Figure I Rig Figure Figure

Claims (2)

[Claims] (1) A main body with a built-in radio wave supply source and an opening for storing food to be cooked; a door that covers the opening of the main body so as to be openable and closable; and a large number of small holes arranged so as to close the opening. A choke structure is provided around the opening of the main body to cover the periphery of the metal plate, and a winding device for winding up the metal plate is provided at the end of the opening of the main body. The microwave oven has a winding device configured to wind up and unwind the metal plate by opening and closing the door. (2) The microwave oven according to claim (1), further comprising a heater provided in the winding drum of the winding device, and a changeover switch for energizing the heater after winding up the metal plate.