JPH0545249B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a jiyar rice cooker used in general households,
The present invention relates to a key input device for electric cooking devices such as automatic bread makers and ovens.

BACKGROUND TECHNOLOGY In a conventional key input device for an electric cooker of this type, as in the example of a rice cooker shown in FIG.
A liquid crystal display element 3 and a light emitting diode 4 are installed on the display frame 5, and the operation unit board 2 is attached to the display frame 5.
Furthermore, the display frame 5 is provided with a window portion in the area of the liquid crystal display element 3 and the light emitting diode 4, and a transparent resin or the like is used for this window portion. Further, a switch 6 is provided on the operation unit board 2, and the rice cooker is operated by operating the switch 6.

In a rice cooker configured in this way, the operation section is
As shown in FIG. 4, a large number of switches 6 are required (10 in this example), and the operation seems complicated, which often results in negative aspects when purchasing the product. Furthermore, in order to make it easier to set the time, adding keys for "0-9" or "AM/PM" would increase the number of switches by 12, which would improve operability, but , the operation section seemed more complicated, which was often a negative aspect when purchasing the product.

Problems to be Solved by the Invention In such a conventional configuration, many switches are required on the operating section, making the operation complicated and difficult to understand. If you add keys for 0 to 9 or AM/PM, it will be convenient, but it will increase the number of switches by 12.
Furthermore, the operation section was complicated, and in this case too, the product seemed complicated to operate, which often resulted in the negative aspects of making it difficult to purchase.

The present invention solves these problems by making it possible to reduce the number of visible switches on the operating section, making the operation easier to understand, and also making it easier to create a click feeling when operating the touch switch. Moreover, it will not malfunction or be destroyed by noise such as static electricity, and even if the operation surface becomes dirty, it can be wiped off immediately, and the display will be displayed when the touch switch is pressed. It is an object of the present invention to provide a key input device for an electric cooking device that does not apply stress to the device.

Means for Solving the Problems In order to solve the above problems, the key input device for an electric cooker of the present invention has a liquid crystal display element and a Place a display device such as a light-emitting diode, and place a glass plate in front of the display device. Use a holder to maintain a constant distance between the display device and the printed circuit board, and keep a certain gap between the glass plate and the display device. A touch switch configured in the form of a film is placed in front of the glass plate, the printed circuit board is held in a display frame having a window portion in the display device portion, and a membrane film larger than the window portion of the display frame is placed. It is attached to the display frame.

Operation According to the above configuration, a transparent touch switch is provided on a display device such as a liquid crystal display element or a light emitting diode, and the position of the switch required for each operation is indicated by the display from the display device. , and because unnecessary switches are not displayed, fewer switches can be seen on the operation panel, making operations easier to understand.Furthermore, the part of the membrane film that touches the switch is placed on a spherical surface. The convex surface makes it easy to create a clicking sensation, and since the membrane film is pasted larger than the window of the display frame, it can easily cause malfunctions or be destroyed by noise such as static electricity. Also, since the operation surface is a membrane film, it can be easily wiped off if it gets dirty, and since the holding stand holds the display device and the glass plate at the same time, it is easier to maintain space between the screens. No stress is applied to the display device when the touch switch is pressed.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Note that the third example shown in the conventional example
Components that are the same as those in the figures and FIG. 4 are given the same numbers, and their explanations will be omitted.

FIG. 1 shows a cross-sectional view of the operating section of a rice cooker according to an embodiment of the present invention. Reference numeral 7 denotes a touch switch placed in front of the liquid crystal display element 3, which is constructed in the form of a film and has a transparent liquid crystal display. The display on the display element 3 is made visible. Reference numeral 8 denotes a membrane film pasted on the display frame 5, which is pasted so as to be larger than the window portion of the display frame 5 provided so that the liquid crystal display element 3 and the light emitting diode 4 can be seen through. 9 is a glass plate that receives the touch switch 7 on the front; 10
is a holder that holds the glass plate 9, the liquid crystal display element 3, and the light emitting diode 4; this holder 10 is attached to the printed circuit board 2, and the liquid crystal display element 3, the light emitting diode 4, and the glass plate 9 are held in a fixed position. A gap is ensured to prevent the force of pressing the membrane film 8 from being transmitted to the liquid crystal display element 3 or the light emitting diode 4.

FIG. 2 shows a front view of the operation section of the rice cooker in one embodiment of the present invention, and shows the liquid crystal display element 3.
indicates the fully lit state, and the switch part of the touch switch 7 is provided in the area surrounded by a frame.

With the above configuration, the positions of the switches necessary for each operation can be displayed using the display on the liquid crystal display element 3, and unnecessary switches are not displayed, making it easy to operate. It is possible to reduce the number of switches that are visible to the public.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, a transparent touch switch is provided on a display device such as a liquid crystal display element or a light emitting diode, and each operation is controlled by the display from the display device. It shows the position of the switch necessary to perform the operation, and prevents unnecessary switches from being displayed. This makes it possible to reduce the number of switches that are visible at the same time as the operation panel, making the operation easier to understand, and making it easier to operate. By making the part of the membrane film that contacts the switch convex, for example in a spherical shape, it is possible to easily create a click feeling.Furthermore, since the membrane film is pasted larger than the window of the display frame, noise such as static electricity can be avoided. Also, since the operation surface is a membrane film, even if it gets dirty, it can be easily wiped off by rubbing it. Since the plates are held at the same time, it becomes easier to secure a space between them, and no stress is applied to the display device when the touch switch is pressed. Moreover, since the display device and the glass plate are held on one holding stand, the parts are combined into one, making it easier to assemble. It is possible to provide a key input device for a cooking appliance.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the operating section of a rice cooker according to an embodiment of the present invention, Fig. 2 is a front view of the operating section of the same rice cooker, Fig. 3 is a cutaway front view of a conventional rice cooker, and Fig. 4 is a front view of the operation section of the rice cooker. 2...Printed circuit board, 3...Liquid crystal display element, 4
...Light emitting diode, 5...Display frame, 7...Touch switch, 8...Membrane film, 9...
Glass plate, 10...holding stand.

Claims (1)

[Claims] 1. A printed circuit board equipped with a control circuit that controls the electric cooking device, a display device such as a liquid crystal display element or a light emitting diode placed on this printed circuit board, and a glass plate placed in front of this display device.
a holding stand that maintains a constant distance between the display device and the printed circuit board and holds the glass plate with a constant gap from the display device; and a holding stand placed in front of the glass plate and configured in a film shape. a touch switch; a display frame having a window in a portion of the display device and holding the printed circuit board;
A key input device for an electric cooking appliance, which is larger than a window of the display frame and includes a membrane film affixed to the display frame.