Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1998-01-20
2000-01-25
Hoang, Tu Ba
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219702, 3644771, H05B 102
Patent
active
060181532
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an operating apparatus, for example, an operating apparatus used in high frequency heating apparatus and electric cooker.
BACKGROUND ART
Hitherto, in a cooker, for example, a high frequency heating apparatus, the menu has been subdivided in order to cook without failure. In addition, by the recent progress in sensor technology, automation and functional sophistication of cooking have been advanced. As a result, by the increase in the number of keys in the operating apparatus and sharing of keys, the operation is complicated, and it is less easier to use. Still more, in the conventional operating apparatus, the display unit and operation unit were placed at different positions. It was hence necessary to observe the display unit and operation unit separately, and handling was confusing, and wrong handling tended to occur.
On the other hand, a microwave oven is proposed as disclosed in Japanese Patent Publication 4-9524. The operation unit of this microwave oven comprises expensive and complicated liquid crystal display and transparent electrode switch sheet. In this constitution, the operation unit is complicated in the assembling work structurally, and the display is poor in transparency, and the life of the display unit is short.
A conventional operating apparatus is described specifically below. As a conventional high frequency heating apparatus, a microwave oven is described by referring to FIG. 10. FIG. 10 is a perspective view of a main body of a conventional high frequency heating apparatus. In FIG. 10, at the front side of the main body 39 of the high frequency heating apparatus, there are plural display units 31, 32, 33, 34, 35, operation units 36, 37, and a door 38 opening and closing for putting food in and out of heating compartment. In this constitution, the display units and operation units are in different layout. Therefore, it is required to observe plural positions while operating. As a result, it is hard to confirm the operating state. It is inconvenient to use because it is required to refer to both display units and operation units during manipulation. It is further possible to select wrong operation keys or fail in cooking. Still worse, it is expensive, poor in productivity, and short in life.
SUMMARY OF THE INVENTION
It is hence a primary object to present an operating apparatus having features including ease of operation, controllability to suppress misoperation, small size, long life, and ease of assembling.
The operating apparatus of the invention comprises a base unit as skeleton of operation unit, a key operation unit disposed at the front side of the base unit, a first design sheet disposed at the front side of the key operation unit, a display device disposed at the front side of the first design sheet, and a second design sheet disposed at the front side of the display device.
The second design sheet forms plural windows, and plural second display means are provided in or around the windows. The display device has plural light function elements having functions of light transmission and light shielding at positions corresponding to the plural windows. The first design sheet has plural display means at positions corresponding to the plural light function elements. The key operation unit has plural switch means, and is electrically connected to the display device, and controls application and cancellation of electric field to the plural light function elements in response to the operation to the windows.
In this constitution, since the display units coincide with the operation units, operation by pressing or the like is easy, and misoperation can be prevented. Moreover, since the display units and operation units coincide, the entire surface of the operating apparatus can be used as operation units. Therefore, in the operating apparatus of a same size, more operation units can be designed. Yet, more effective use is possible, and the operating apparatus may be further reduced in size.
Further, only the necessary information c
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patent: 5654739 (1997-08-01), Sakaia et al.
Ebisawa Mitsuo
Fujii Yasuteru
Matsuda Masato
Okutsu Takamasa
Yano Masashi
Hoang Tu Ba
Matsushita Electric - Industrial Co., Ltd.
Pwu Jeffrey
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