JPS63282424A - Heating cooker - Google Patents

Abstract

PURPOSE:To realize a timer with illumination which is bright and uniform without inconvenience such as light leakage by providing the operation output shaft of a timer with a dial made of a transparent material and disposing a light source on the back of the dial with a distance from it. CONSTITUTION:To the operation output shaft 19 of a timer, a dial 15 is connected which forms a transparent section made of a transparent material such as resin, etc., and light shielding section and displays a graduation 20. At a part of the front face of the dial 15 a dressed plate 16 which is constituted of a transparent material and forms a fan shaped light passing part by masking printing 21 is inserted into an operation panel 13, and on the inside of a main body opposed to the light passing part a lamp 22 is provided being positioned at a part where both ends of display widths l1, l2 of the dressed plate 16 and a light source make an angle that is an acute angle smaller than 90 deg.. With this arrangement the light that goes through the light shielding plate 23 by the lamp 22 illuminates the dial 15 substantially uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cooking device such as a microwave oven or an electric oven for heating food.

2. Description of the Related Art In general, in a heating cooking device, the following steps are taken: storing an object to be heated in a heating chamber, closing the door, setting a predetermined heating time, and cooking the object.

FIG. 6 is an external perspective view showing the structure of such a conventional cooking device, and FIG. 7 is a sectional view of a timer portion of the cooking device. In FIGS. 6 and 7, a door is provided on the front surface of the main body 1 so that it can be opened and closed. Furthermore, the main body 1 has an operation panel 3.
and a timer knob 4. The timer knob 4 is connected to a timer 5, and is rotated to open and close. The timer knob 4 is provided with an index e, and the time is set by aligning it with the character display 7.

FIG. 78 and FIG. 9 are partial sectional views showing other examples of a part of a timer of a conventional heating cooker.

In FIG. 8, a decorative plate 8 having a transparent portion is provided on a part of the operation panel 3, and a dial 9 is provided on the back side of the decorative plate 8 coaxially with a timer knob, and a character display is provided on this dial. A lamp 1o is provided above and in front of the dial 9 to illuminate the dial 9.

In FIG. 9, a dial 9' is formed of a light-transmitting material, a character display is provided, and a lamp 10' is provided behind and close to the dial 9' for illumination.

Problems that the invention aims to solve However, such conventional heating cookers are generally installed in relatively dark places such as above the refrigerator in the kitchen or against the wall. When setting the timer scale, it is difficult to set the dark and detailed scale, making it difficult to use.

It is important to adjust the heating time accurately to ensure successful heating. Particularly in the case of high-speed heating such as in a microwave oven, even the slightest difference in time can cause overheating, which is undesirable because it can lead to cooking failures.

The illuminated timer shown in Figures 8 and 9 partially eliminates the above drawbacks, but because the lamp and dial are close to each other, there is extreme unevenness in illumination between bright and dark areas. Not only was it difficult to see, but it also had an unsightly appearance.

Also, the heat generated by the lamp heats up the dial etc.
Only a lamp with low power consumption could be used, and it was not possible to provide high-intensity illumination, which also did not lead to a sufficient improvement in usability.

The present invention solves these conventional problems, and provides a timer with a simple configuration and uniform bright illumination, and a cooking device that is easier to use.

Means to Solve the Problems The heating cooker of the present invention has a dial made of a translucent material on the operation output shaft of the timer for setting the heating time, and a dial for displaying the displayed contents. A decorative plate having a passage part that selectively passes light is provided in the dial, a lighting device is provided behind the dial, and the light source is arranged so that the angle formed by the light source and both ends of the display width of the decorative plate is an acute angle of 90 degrees or less. It is arranged at a distance from the dial, and a part of the timer is illuminated.

Further, a light shielding plate having an opening substantially equal to the light passing portion of the decorative plate is provided behind the dial.

This light shielding plate also serves as a timer mounting plate.

Further, the lighting lamp is configured to be cooled by a blower.

Function The heating cooker of the present invention is configured such that the light source of the lighting device is positioned so that the angle of irradiation onto the decorative panel is acute, so that the distance from the light source to the dial is approximately equal over the entire irradiation surface, resulting in uniform lighting. Bright timer lighting is possible.

Still, the light shielding plate allows the light from the light source to be focused on the passing part of the decorative board, preventing unnecessary light from being irradiated to other parts, thereby preventing problems such as excessive light leakage.
, since the distance between the dial and the lamp is sufficient, it is possible to provide lighting with a large wattage and sufficient brightness.
This effect can be further improved by cooling the lamp with a blower.

EXAMPLE Hereinafter, a heating cooker according to an example of the present invention will be explained with reference to the drawings. FIG. 1 is a perspective view showing the external appearance of a cooking device according to the present invention, and FIG. 2 is an enlarged front view of an operation panel portion of the cooking device.

In FIGS. 1 and 2, a heating chamber (not shown) is provided in the main body 11, and the object to be heated is heated and cooked by operation of a heating source such as an electric heater or radio waves. A door 12 is provided at the front of the heating chamber so as to be openable and closable, and an operation panel 13 is provided at the side.

The operation panel 13 is provided with a timer knob 14 for rotating the timer. Timer knob 14
A dial 16 is provided coaxially with the dial 16, on which characters are displayed. The front surface of the dial 16 is made of a translucent material,
A decorative board 16 is provided in which a fan-shaped passage part through which light selectively passes is formed in a part by printing. The decorative board 16 is similarly provided with an index 1 by printing or cooking.

FIG. 3 is a partial sectional view showing the structure of a part of the timer of the cooking device according to the present invention, and FIG. 4 is a partially exploded perspective view of a part of the timer.

In FIGS. 3 and 4, the timer knob 14 is connected to the main shaft 19 of the timer 18. Similarly, a dial 16 is connected to the main shaft 19. The dial 15 is made of a translucent material such as resin, and by printing a light-shielding paint on its surface, a light-transmitting portion and a light-shielding portion are formed to display the display scale 2o. A decorative plate 16 is fitted into a part of the front surface of the dial 16 on the operation panel 13. The decorative board 16 is made of a translucent material, and a portion thereof is masked in a fan shape by printing 21 to form a passage portion through which light selectively passes. 17 is an index. A lamp 22 constituted by an incandescent light bulb or the like is provided inside the main body, facing the light passage part of the decorative board 1e.

This lamp 22 is located at a position where the angle θ formed by the light source and both ends of the display widths tj and t2 in the vertical and horizontal directions that display the scale that makes the dial 16 visible through the light passing portion of the decorative plate 16 is an acute angle of 90 degrees or less. Place it in

Reference numeral 23 designates a light shielding plate, which has an opening 24 of approximately the same size in a portion located between the 2-side aperture 16 and the lamp 22 and facing the light passage portion of the decorative plate 1e, so as to concentrate and select the light from the lamp 22. The configuration is such that the dial 15 section is illuminated.

The light shielding plate 23 also serves as a mounting plate for fixing the timer 18, and also serves to fix the timer 18 to the operation knob 13.

With such a configuration, the light from the lamp 22 causes the light shielding plate 2 to
The light that passed through 3 illuminates the dial 16 evenly,
The scale 2o is illuminated for easy viewing from outside the decorative board 16. The dial 15 rotates as the knob 14 rotates, and the timer is set by aligning the scale 2o with the index 17.

FIG. 5 is a sectional view showing the structure of a cooking device according to another embodiment of the present invention. The same parts as in FIGS. 3 and 4 are indicated by the same numbers.

A timer knob 18 connected to a timer 18 is provided on the operation panel 13 on the front side of the main body, and the dial (not shown) is illuminated by a lamp 22. The magnetron 26 that supplies high frequency waves into the heating chamber 26 and the magnetron 2
A high-voltage transformer 27 for supplying high-voltage power to 6 is provided in the machine room. , a fan motor 2B is installed at the rear, and the magnetron 26 is
and the high voltage transformer 27. 30.31 is an exhaust port. A portion of the cooling air generated by the fan motor 28 is supplied to the lamp 2.
The structure is such that air is blown to the second part for cooling.

Effects of the Invention As described above, the heating cooker according to the present invention exhibits many useful effects as follows.

(1) Since the dial is illuminated by a lamp from the back, the timer scale and indicators are bright and easy to see even when used in relatively dark places such as in the corner of the kitchen or on top of the refrigerator. This reduces time errors in timer settings,
By adjusting the heating time accurately, the heating performance is improved and the usability is also improved.

(2) Since the index is arranged so that it overlaps the front side of the scale of the dial, the scale and the index coincide, eliminating parallax, making it easy to align from this side, and making it easy to use with little error. This effect is more effective when both a time scale and a Durham scale for defrosting and cooking are provided on the dial in a high-frequency heating device.

(3) Since the lamp is installed in a position where the angle between the light source and the irradiation surface is acute, the distances from the light source to each part of the irradiation surface are approximately equal, achieving even and uniform illumination. This makes the timer easier to read, and easier to use from a visual perspective. It is also preferable in terms of appearance.

(4) The lamp and dial are separated, so
A lamp with a high wattage can be used to provide sufficient illumination. The lamp's heat has less of an effect on the dial, and since the lamp filament temperature can be raised sufficiently, the wavelength of the light becomes shorter, and the illumination changes from red to white, resulting in high brightness and clear scale display. From this point of view as well, visibility and appearance are improved.

Since the temperature of the dial and decorative panels is also lower, there is no need for heat-resistant materials, making them cheaper.

(5) By installing a light-shielding plate that has an opening with approximately the same size as the light passing portion of the decorative board, light will not be irradiated to areas that do not need illumination, so for example, there may be some pinholes in the printing on the back of the decorative board. Light leakage is less likely to occur even if there are scratches or gaps in other parts.

Also, if the light shielding plate is used both in the evening and in the moment for installation, no separate parts are required and it is more rational.

(6) By cooling the lamp with air from a fan motor, the wattage can be further increased and the illuminance can be increased. Furthermore, since the lamp temperature can be lowered, the lifespan is extended, and a highly durable heating cooker can be realized.

In this way, it is possible to exhibit highly practical effects with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cooking device according to an embodiment of the present invention, FIG. 2 is a front view of the operation panel of the cooking device, and FIG. 3 is a partial cross-sectional view of a part of the timer of the cooking device. 4 is a partially exploded perspective view of a part of the timer, FIG. 5 is a sectional view of a heating cooker according to another embodiment of the present invention, FIG. 6 is an external perspective view of a conventional heating cooker, and FIG. FIG. 7 is a sectional view of a portion of the timer of the same cooking device, and FIGS. 8 and 9 are partial sectional views showing other examples of the timer portion of the conventional cooking device. 13... Operation panel, 14... Timer knob, 15... Dial, 16...
- Decorative board, 17... Pointer, 18... Timer, 20... Display scale, 21... Printing, 22... Lamp, 23 ..... Light shielding plate, 24 ..... Aperture, 26 ..... Magnetron, 27 ..... High voltage transformer, 28 ..... Fan motor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 6 Figure 7v! J

Claims (4)

[Claims] (1) A heating chamber that stores an object to be heated, a heating source that heats the object to be heated, a timer for setting a heating time that controls the operation of the heating source provided on an operation panel, and an operation output of the timer. A dial attached to a shaft, a knob for rotating the operation output shaft, and a decorative plate provided on the front surface of the dial and having a passage portion that selectively passes light, the dial being transparent. The dial is made of a light-sensitive material and has a configuration in which a display scale is displayed, and a lighting device is provided behind the dial, and the lighting device is located at a position where the angle formed by both ends of the display width of the decorative board and the light source is 90 degrees or less. A heating cooker configured to be placed in. (2) The heating cooker according to claim 1, wherein a light shielding plate having an opening substantially equal to the light passage portion of the decorative plate is provided between the dial and the lighting device. (3) The heating cooker according to claim 1, wherein the light shielding plate is configured to also serve as a mounting plate for fixing the timer. (4) The cooking device according to claim 1, wherein the lighting device is configured to be cooled by a blower.