JPS5960128A - Heating device - Google Patents

Abstract

PURPOSE:To provide the titled device which is compact in construction, by embedding a control board into a door for simplifying a wiring arrangement between a liquid crystal displaying section and a controller in an electronic or an electric ovens. CONSTITUTION:A control board 6 embedded into a door 3 consists of a control piece 7 and a displaying section 8 and is adapted to input a heating instruction from an operator into a controller. A controller 16 causes a lamp relay 17 to turn ON via a connector 14 for lighting a lamp 11, when either a power key or a time presetting key is depressed or when a time presetting volume is turned. Therefore, a transparent type liquid crystal displaying section 8 is brightly illuminated by a lamp 11 provided inside the body, and thereby allowing an operator to clearly and neatly read the display.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is a heating device equipped with a door, such as a microwave oven or an electric oven, by making the main body of the heating device smaller by embedding an operation panel in the door. , and has improved operability.

Conventional configurations and their problems Conventionally, an application has already been filed for a configuration in which an operating piece that commands the power supply to the heat source and a controller that controls the power supply are incorporated into the door, and it is difficult to make the product compact. It's really effective. However, although recent heating devices have made full use of microcomputers and sensors, and are now capable of automatic cooking, they have become complicated to operate, making them difficult to use without display means. However, if a fluorescent display tube or light emitting diode is used as the display means,
Due to the thickness of these features, it is difficult to incorporate these display means into the door, making it impossible to make the product compact.

On the other hand, there is a conventional example in which a door is provided with a screen glass and a liquid crystal display is provided on this screen glass. By using a liquid crystal as a display means, the above-mentioned conventional example has the advantage of being thin and having a large display area; however, since the liquid crystal element is not a self-luminous element, it has a major drawback that the display is dark and difficult to see. In addition, the liquid crystal display
Limitations such as narrow operating temperature/range, slow response, poor contrast ratio, etc. (%duty dynamic drive is more desirable than static drive).
Compared to fluorescent display tubes, which can provide a sufficiently slow display even with duty dynamic drive, the number of display element segments is 3 to 5.
Since the display unit and controller are separated, wiring between the two is difficult.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional technology, and provides an easy-to-read liquid crystal display, a simple connection between the liquid crystal display and the controller, improved operability of the heating device, and a more compact product. The purpose is to

Structure of the Invention In order to achieve the above object, the present invention incorporates an operation piece, a controller, and a liquid crystal display unit into the door part,
In addition, the liquid crystal is of a transmissive type and is illuminated by a light source inside the main body, so the display is bright and easy to see even when the surrounding lighting is dark.The operation panel 2 display and controller are adjacent to each other, making it easy to connect them to each other. It is easy to use and has very good operability. Furthermore, the product can be made more compact.

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

FIG. 1 is a perspective view of the main body of a microwave oven showing an embodiment of the present invention. The main body 1 houses various controlled parts and a heating chamber 2. The front opening is closed by a door 3, which is rotatably supported. The oven lever 4 is an operating piece for unlocking the door 3 and opening the door. The door key 5 engages the body and locks the door 3 in the closed position.

An operation panel 6 is embedded above the door 3. The operation panel 6 includes an operation piece 7 and a display section 8, and a user's heating command is input to the controller.

The controller is arranged on the back side of the operation panel 6, and is connected to the controlled section on the main body 1 side by a cable or the like.

FIG. 2 shows a section xx of such a heating device.

The operation panel 6 has a thin structure and is attached to the door.

The operation panel 6 includes a d: controller, and the main body 1
It is connected to the controlled unit 9 on the side by a cable or the like. Now, the controlled part 9 includes many parts that cannot be incorporated into the operation panel 6, such as a relay that controls power supply to the magnetron 10, a relay that controls turning on and off the interior light 11, a capacitor that cannot be made into chip components, and a power transformer. It will be posted.

A rotary mounting table 12 is provided in the heating chamber 2, and the object to be heated 1
Improve the uneven baking in step 3. This is a motor that is the driving source for the rotary mounting table 12 of the 14-cigarette.

FIG. 3 shows how to connect the operation panel 6 embedded in the door 3 and the controlled part 97 on the main body side. The operation panel 6 and the controlled part 9 are connected by a flexible cable 16. This cable passes near or through the door hinge.

FIG. 4 shows the electric circuit of the operation panel 6 and the controlled section 9. The controller 16 controls the input from the operating piece 7 and the output to the display section 8, and also controls the controlled section 9 of the main body through the cable 15.

FIG. 5 is a sectional view of the main body, seen from above, and shows the portions related to the liquid crystal illumination extracted. When the user's heating command is input to the controller 16 through the operating piece 7 while the door is closed, that is, the user presses the power key or the time setting key. Alternatively, if the time setting volume is not turned, the controller 16 turns on the rung relay 17 via the connector 14, thereby changing the rung 11 from the unlit state to the lit state. When viewed from the front of the main body, the transmissive liquid crystal display section 8 is brightly illuminated by the lamp 11 inside the main body, and the display can be seen clearly and clearly. A portion of the light emitted from the lamp 11 passes through the punched small hole 2Q and the glass window 21 and illuminates the transmissive liquid crystal element 8.

The punched small holes 20 are provided to prevent microwave leakage. If the door is opened at this point, the controller 16 can also turn off the lamp 11. On the other hand, the umbu 11 also illuminates the inside of the heating chamber 2 through the small hole 22 of the nogunting. The display section 8 displays the type of cooking and heating time. The lamp 11 is turned off by canceling heating during cooking or by turning off the lamp relay 1 at the end of cooking.

As explained above, according to this embodiment, the product can be made more compact by shrinking the operating section including the display means into the door, and has the effect of providing a brighter and easier-to-read display and improving operability. .

Effects of the Invention As described above, the present invention provides the following effects. First, a transmissive liquid crystal display is used as a display means [2
This is configured to be illuminated by a light source inside the main body, so the display is bright and very easy to read. Second, since the operating piece and the display means are close to each other, operability is improved.

Thirdly, by arranging the controller on the back side of the operating piece, wiring to the segments of the liquid crystal display becomes easier.

Fourth, the product can be made more compact by incorporating the operating section into the door. Fifth, if the interior lamp of the conventional heating device is used for illuminating the transmissive liquid crystal display, there is no need to provide a light source for illuminating the liquid crystal display. Sixthly, when the heating device is not in use, there is no display, so there is no need to turn on the rung, which saves power. Seventh, by using a liquid crystal display as the display means, it consumes less power than conventional fluorescent display tubes or light emitting diodes, resulting in considerable energy savings.

[Brief explanation of the drawing]

1st south is a perspective view of the main body of a heating device showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line XX, FIG. 3 is a diagram showing a method of connecting the operation panel and a controlled part, and FIG. 4 Figure 5 is a circuit diagram showing an example of the circuit configuration, and Figure 5 is a cross-sectional view of the main body, viewed from above, and is an enlarged view of the parts related to the illumination of the liquid crystal.・Main body, 2... Heating chamber, 3...
Door, 6... Operation panel, 7... Operation piece, 8 - Display section, 9... Controlled section, 10... Magnetron, 11... Lamp, 13...・Object to be heated, 15
... Cable, 16 ... Control,
17...Ranff lJL/-0 Agent's name Patent attorney Satoshi Nakao Male 1 or 1 person Figure 1

Claims (2)

[Claims] (1) A main body with a built-in controlled part, a heating chamber housed in the main body and in which an object to be heated is placed, a heat source connected to the heating chamber, and a heat source supported in the opening of the heating chamber so as to be openable and closable. a door, an operation piece for commanding power supply to the heat source, an operation panel including the operation piece and display means, and a controller for controlling power supply to the heat source according to commands from the operation piece; The heating device has a configuration in which the panel and the controller are built into the door, a transmissive liquid crystal is used as the display means, and the liquid crystal is illuminated from a light source inside the main body. (2) The heating device according to claim 1, wherein the light source is used for both liquid crystal lighting and lighting inside the heating chamber.