JPS6035421A - Heating cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a panel base for attaching a keyhole of a heating cooker having a microcomputer.

In recent years, microcomputers and electronic control devices have been applied to a wide range of fields including cooking appliances, but these microcomputers have the disadvantage of being extremely vulnerable to static electricity and surge currents.For example, as shown in Figure 8, the operation panel frame 6 When performing cooking operations in a heating cooker in which a keyboard 3 having various cooking keys is housed, static electricity charged on the human body is transmitted from the keyboard 3 to the operation panel frame 6, and the back of the operation panel frame 6 is electronic component 1 provided on the board 11 of
There is a risk that static electricity may flow through the microcomputer 2 and the microcomputer 13, destroying the electronic component 12, or that the microcomputer 13 may malfunction and the heating device may be heated abnormally.

Furthermore, when the keyboard 3 is housed in the operation panel frame 6 and assembled into the panel base 2, the keyboard 3 may come off from the operation panel frame 6, making it difficult to assemble.

The present invention eliminates the drawbacks of the conventional heating cooker, and one embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

In FIG. 1, reference numeral 1 denotes a main body of a heating cooker, and a panel base 2 made of a non-conductive material is provided on the front surface of this main body. Reference numeral 3 denotes a keyboard provided on the front surface of the panel base 2, which has a plurality of cooking keys 4 and 5, and whose front peripheral edge is covered with an operation panel frame 6 made of a conductive material.

In FIG. 2, the panel base 2 has a recessed part in which a keyboard 3 is housed, as shown in FIG.

A locking piece 8 is provided. 9 is a protrusion provided on the operation panel frame 6 as shown in FIG.
It penetrates through and is locked in electrical contact with the chassis 1o of the main body 1.

Reference numeral 11 denotes a board provided within the panel base, and electronic components 12 and a microcomputer 13 are arranged on this board.

In Fig. 3, 14 is a keyboard 3 made of synthetic resin.
This board 14 is provided with cooking key switches 15 and 16 corresponding to the cooking keys 4 and 5, and a spacer 17 that is an insulating material is provided between the swifts 15 and 16. . An insulating sort 18 is provided to cover the spacer 17 and the cooking keys 4 and 5, and a decorative board 19 is stacked and bonded on top of the insulating sheet 18. 2o is switch 1 of cooking keys 4 and 5
5.16 is a lead-out section which collects and leads out the wiring arranged, and this lead-out part is connected to the electronic control device 21 shown in FIG. 4. 22 and 23 are door opening/closing switches, and 24 is a switch provided in the input circuit on the primary side of the cooking device, which is opened and closed by a signal from the electronic control device 21. 25 is a magnetron that generates high frequency waves.

With such a configuration, the heating cooker of this embodiment accommodates the keyboard 3 in the recess 7 of the panel base 2 provided on the front surface of the main body 1, and locks the keyboard 3 with the locking piece 8 provided in the recess 7. The operation panel frame 6 is fixed from the front of the panel base 2 to cover the front edge of the keyboard 3, and the protrusion 9 provided on the operation panel frame 6 penetrates the panel base 2 and electrically connects to the chassis 10 of the main body 1. It comes in contact with and is locked.

Then, the wiring arranged in the switches 15 and 16 of the cooking keys 4 and 5 is collected into a lead-out part 20, and this lead-out part 20 and an electronic control device 21 are connected.

In the heating cooker of this embodiment configured in this way,
When using this heating cooker, when the input power is turned on and the door is closed, the door open/close switches 22 and 23 are closed. Then, by selecting and pressing the cooking key 4 or 5 and then pressing the cooking start key, the cooking key switch 15 or 16 is turned on and the electronic control device 21 is activated. When a signal is sent to the switch 24, the contact 25 of the switch 24 closes and the magnetron 26 generates a high frequency wave.

With such a configuration, the heating cooker of this embodiment has a substantially U-shape provided in the recess 7 of the panel base 2 when the keyboard 3 of the heating cooker is housed in the recess 7 of the panel base 2 and the operation panel section is assembled. Since the keyboard 3 is fixed with the locking piece 8 made of a shaped elastic body, the operation panel frame 6 can be easily attached. Even if static electricity charged on the human body is transmitted to the keyboard 3 when operating the keyboard 3, the panel base 2 is made of a non-conductive material, so static electricity will not be transferred from the protrusion 9 of the operation panel frame 6 to the chassis 1o. Grounded. Therefore, since static electricity is not transmitted to the electronic component 12 and microcomputer 13 provided on the board 11, it is unlikely that the electronic component 12 will be destroyed or the microcomputer 13 will malfunction and become abnormally heated.

As described above, in the heating cooker of the present invention, by providing a locking piece of an elastic body formed in a substantially U-shape in the recessed part of the panel base where the keyboard is attached, assembly of the operation panel section is facilitated, and the keyboard can be easily assembled. The panel base on which the keyboard is installed is made of a non-conductive material, and the keyboard is covered with a conductive operation panel frame to make electrical contact with the chassis and ground it, so even if static electricity from the human body is transferred to the keyboard, the panel Static electricity is often transmitted to electronic components and microcomputers installed on the board inside the space, so the safe heating cooker will not destroy the electronic components or cause the microcomputer to malfunction.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view of the main body of a heating cooker showing one embodiment of the present invention, and FIG. FIG. 3 is an enlarged sectional view showing the main parts of FIG. 2, FIG. 4 is a system diagram showing the entire heating cooker of FIG. 1, and FIG. 5 shows the main parts of the panel base of FIG. FIG. 6 is a perspective view showing the operation panel frame in FIG. 1, FIG. 7 is a sectional view showing the main part of the locking piece of the panel base in FIG. FIG. 2 is a sectional view of a main part of an operation panel section showing a conventional example corresponding to the figure. 1... Book L 2... Panel base, 3...
...Keyboard, 6...Operation panel frame, 7...
... recess, 8 ... locking piece. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 22 Figure 5 Figure 6

Claims (1)

[Claims] A heating cooker body, a panel base provided on the front side of the body and made of a non-conductive material, a keyboard provided in a recessed part of the panel base, and the keyboard covered with a made of a conductive material. the control panel frame, and a locking piece provided in the recess of the knob base,
A heating cooking device characterized in that the keyboard is fixed to the neret base using a locking piece provided in a recessed portion of the panel base.