JPH0749860B2 - Heating cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operating device for a heating cooker such as a microwave oven, an electric oven, or a microwave oven in which these are combined.

2. Description of the Related Art Conventionally, in a cooking device having a digital control unit such as a microwave oven using a microcomputer, cooking performance is improved by application of a temperature sensor, a humidity sensor, a weight sensor, etc. Has also increased. Therefore, the number of menu keys arranged on the operation panel is increased and the operation becomes complicated. Further, although a fluorescent display tube or the like is used in the display unit, the amount of information displayed is small and it is inconvenient.

Therefore, of the cooking menus, the menus that are rarely used are grouped together and displayed on the EL display panel, which makes it possible to display these menus only when necessary, which is complicated when many menus are always displayed. A method of improving the operability and improving the operability can be considered.

Problems to be Solved by the Invention However, when trying to display a menu using the EL display panel as described above, it is actually impossible to form characters on the EL display panel itself. Since it is necessary to provide a transparent plate-like smoke plate on the front face of the board and print the smoke plate to provide a character portion, the smoke plate is inserted into the opening of the operation panel. However, the operation panel and the smoke plate are made of a material having high electric insulation such as synthetic resin. Therefore, the operation panel and the smoke plate easily accumulate static electricity on the surface thereof.
Therefore, for example, when a person touches the operation panel, the static electricity charged in the human body is discharged, and the surfaces of the operation panel and the smoke plate are charged. The charged static electricity moves on the surfaces of the operation panel and the smoke plate and also moves to the back side of the joint. There was a problem that the static electricity that invaded the back side spreads to the connecting part of the electrode and the lead wire of the EL display board and an incorrect signal was transmitted to the microcomputer, and the cooking program of the heating cooker did not operate normally. Moreover, some cooking menus generate a lot of steam, and the EL display panel that dislikes humidity is disadvantageous in terms of performance and has a problem in terms of life, and if it is cut off on the way it becomes unusable and must be replaced frequently. There was a very difficult problem of not becoming.

The present invention solves such conventional problems, improves the complexity when a large number of menus are always displayed using the EL display panel, improves operability, and The purpose is to improve the reliability of the EL display panel by applying a simple process to the back plate made of metal to hold.

Means for Solving the Problems In order to achieve the above object, the heating cooker of the present invention is a heating cooker for selecting a cooking menu and setting cooking conditions. 4)
And a smoke board (15) having a menu table (9) in which the cooking menu inserted in the opening is written,
An electroluminescence display panel (17) (hereinafter referred to as an EL display panel), which is arranged at the rear of the smoke board (15) and illuminates the menu table (9), and the EL display panel (17)
The back plate (16) made of metal grounded to the metal part of the main body (1) for holding the food from the rear, the control part provided at the print base end 20 for controlling the cooking means and the display, and the EL display panel (17). ) Electrode (17a) and a lead wire (19) for electrically connecting the control section, the menu table (9) describes a menu that is relatively infrequently used, and the smoke board (15) And a joint (22b) between the operation panel (4), the electrode (17a) of the EL display panel (17), and the lead wire (19).
From the joint (23) to the joint (23)
b) and the distance (A) to the end face of the hole (21) of the back plate (16) provided for drawing out the lead wire (19) of the EL display panel (17) is made smaller. .

Operation With this configuration, the complexity of the case where many cooking menus are constantly displayed is improved, and the operation procedure is shown, which is easy to use and resistant to static electricity and the life of the EL display panel. It has the effect of extending.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a perspective view of the heating cooker according to the present invention.

In FIG. 2, there is a heating and cooking chamber in the main body 1, a door 2 is provided at the front opening thereof, a handle 3 for opening and closing the door 2 is provided at the upper portion of the door 2, and an operation panel is provided above the handle 3. 4 is installed. On the operation panel 4, there is a knob 5 for adjusting the time, a display tube 6 for displaying the time, the cooking menu name, symbols, etc., and a "microwave oven" strong "," weak "," grill "," oven "for each function manually. ], Etc., an automatic cooking menu 8 that is relatively frequently used, a menu table 9 that lists relatively infrequently used menus, a cooking start button 10, and the like are attached.

FIG. 3 is a block diagram of the control circuit of the heating cooker according to one embodiment of the present invention, and the operation method of the operation panel 4 will be described. This heating cooker is the same as the conventional method for both manual and automatic cooking. That is, in manual cooking, the operation button 7 is pushed, the knob 5 is turned to set the time, and the cooking start button 10 is pushed. Further, in the automatic cooking menu 8 which is relatively frequently used, when the key displaying each menu is pressed, it is determined that the controller 11 has input, and the cooking menu name set in the fluorescent display tube 6 is displayed. Then, when the cooking start button 10 is pressed, the heating means 12 follows the cooking sequence and the temperature sensor and humidity sensor 13
Automatic cooking can be performed by performing an operation according to the detection output of. This relatively frequently used menu is divided into cooking categories, and the colors of each category make it easy to understand the name of each menu. It has a structure that is easy to use, such as the touch feeling being improved.

Next, for the relatively infrequently used automatic cooking menu, press the gourmet key 8a, which is one of the relatively frequently used automatic cooking menus 8, and the "ON" signal is sent to the EL display drive circuit 14. EL display board by sending
Lights up. Illuminating indicates an operation procedure for selecting which menu in the menu table 9 is selected, and turning the knob 5 sets the menu. And
When the cooking start button 10 is pressed, automatic cooking can be performed by the same procedure as the automatic cooking menu which is relatively frequently used. With such a configuration, the complexity when many menus are always displayed can be improved, the operability can be improved, and the usability can be improved.

FIG. 1 is a cross-sectional view showing the structure of the EL display panel of the heating cooker according to the present invention.

In FIG. 1, a smoke plate 15 made of a synthetic resin on which a menu table that is relatively infrequently used is printed is inserted into the opening of the operation panel 4 made of a synthetic resin, and the smoke plate 15 is pressed and fixed. A back plate 16 made of metal is provided at the rear part, and an EL display board 17 is fixed to the stepped part of the back plate 16 with a double-sided tape 18 at a portion corresponding to the menu table printed on the smoke plate 15. Has been done. EL display board
The electrode 17a of 17 is electrically connected by a lead wire 19 to a printed board 20 provided with a control unit having a control circuit such as the controller 11 of the cooking device. End face 21a of hole 21 provided in back plate 16 for pulling out the lead wire
And the relationship between the distance "A" between the operation panel 4 and the joint 22b of the smoke plate 15 and the distance "B" between the end face 21a and the electrode 17a of the EL display panel 17 and the connecting portion 23 of the lead wire 19 is A < These parts are arranged so that the positional relationship becomes B, and the back plate 16 is grounded to the metal part of the main body.

With this configuration, for example, when a person touches the operation panel 4 and the static electricity of the human body moves to the operation panel 4 or the smoke plate 15, the static electricity enters the inside of the joints 22a and 22b. Then, when the charged amount exceeds a certain level, it becomes easy to discharge. The electric discharge occurs where the electrolytic strength is high. In this embodiment, since the end face 21a of the hole 21 provided in the operation panel 4 and the smoke plate 15 of the joint 22b and the back plate 16 has an angle (a right angle in this embodiment), the electrolytic strength of this portion is different. Stronger than the flat part of. Further, since the back plate 16 is grounded to the main body, the potential difference between the operation panel 4 or the smoke plate 15 and the back plate 16 is larger than the potential difference between the other parts.
Further, in this embodiment, the distance "A" is designed to be smaller than the distance "B".

Therefore, the above static electricity is generated by the electrode 17a of the EL display board 17 and the lead wire 1
Before discharging at the joint 23 of 9 and discharging at the end surface 21a of the hole of the back plate 16. This allows static electricity to flow to the body ground. Therefore, an erroneous signal due to noise such as static electricity is transmitted to electronic components such as the controller 11 of the control unit provided on the printed board 20 through the lead wire 19 of the EL display board 17, and the cooking program will not operate normally. The situation can be prevented.

In addition, a cooling air (not shown) provided by a cooling fan (not shown) provided behind the operation panel 4 in the upper part of the heating chamber 24 for cooling the magnetron (not shown) and electric parts on the printed board 20 is operated by the operation panel. The sash 25 having a plurality of holes in the opening provided in the lower part of 4 is configured to exhaust the gas. Steam generated by heating the object to be heated in the heating chamber 24 enters the operation panel 4 through the hole between the door 2 and the front wall 26 of the heating chamber 24 through the hole of the sash 25. The back plate 16 is bent along the outer frame wall 26 of the operation panel 4 and the wall 27 is provided to prevent vapor from easily entering. Performance can be secured. Further, although it is an EL display panel that has a problem in terms of life under high temperature conditions, since the back plate 16 is bent along the outer frame wall of the operation panel frame 4 and the wall 27 is provided in this way, cooling is possible. Since the cooling air of the fan (not shown) is exhausted through the wall 27, heat is effectively dissipated, and the temperature rise of the portion of the back plate 16 in contact with the EL display panel 17 can be reduced. The reliability can be further improved.

Effects of the Invention As described above, according to the heating cooker of the present invention, the following effects can be obtained.

(1) A large number of automatic cooking menus are classified into those with high frequency of use and those with low frequency of use, and by displaying those with low frequency of use only when necessary, the complexity of always displaying a large number of automatic cooking menus To improve the design, realize a sophisticated design, and improve the usability by making the operation procedure easy to understand.

(2) Since the control circuit for controlling the heating means can be protected from noise such as static electricity entering from the outside of the operation panel, accurate heating control can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the configuration of a heating cooker according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a control block diagram thereof. 1 ... Main body, 4 ... Operation panel, 9 ... Menu table, 15
…… Smoke board, 16 …… Back board, 17 …… EL display board, 17
a ...... electrode, 19 ... lead wire, 21 ... hole, 22b ... seam,
23 …… Coupling part.

Claims (2)

[Claims] 1. A heating cooker for selecting a cooking menu and setting cooking conditions includes an operation panel (4) having an opening on the front face of the main body and a cooking menu inserted in the opening. A smoke board (15) equipped with a menu table (9), and an electroluminescence display board (17) (hereinafter referred to as an EL display board) which is arranged at a rear portion of the smoke board (15) and illuminates the menu table (9). ) And the EL
A main body (1) for holding the display board (17) from the rear, a back plate (16) made of metal grounded to a metal part, and a control section provided on a print board 20 for controlling cooking means and display;
An electrode (17a) of the EL display panel (17) and a lead wire (19) for electrically coupling the control unit are provided, and the menu table (9) shows a menu that is relatively infrequently used.
The distance (B) between the seam (22b) of the smoke plate (15) and the operation panel (4), the electrode (17a) of the EL display panel (17), and the connecting portion (23) of the lead wire (19). ) Than the lead wire (19) of the seam (22b) and the EL display panel (17)
The holes (2
A heating cooker configured so that the distance (A) to the end face of 1) is made smaller. 2. A back plate (16) for holding the EL display panel (17) from a rear portion thereof extends to a wall of an outer frame of an operation panel (4) provided below the EL display panel (17), and a wall The cooking device according to claim 1, wherein the heating cooker is bent along a line.