JPS6034416A - Anti-static device for cookers - 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 Field of the Invention The present invention relates to an antistatic device for a cooking appliance using an electronic control element for use in general households.

Structure of the conventional example and its problems In the conventional antistatic device for this type of cooker, the first
As shown in the figure, a circuit board 2 is provided on a main body 1, and a control circuit element 3 is fixed to the circuit board 2. The circuit board 2 is fixed to a display box 4, and a control circuit element 3 is fixed to the circuit board 2. Based on the information from element 3, cooking such as boiling or keeping warm is controlled in detail. In addition, this type of cooker is generally provided with a front panel 6 that is placed on the front of the display box 4 and fixed with screws 5 etc. in order to simplify repair service. , In order to hide the screws 5 and to beautifully finish the multi-colored printing on the surface, a decorative plate 7 made of a metal material was removably attached to the front surface of the tunnel 60.0 And, with this configuration, Display box 4 and front panel 6
It has a complex shape with many holes, walls, melons, bosses, etc., and resin is generally used to make it light, cheap, and beautiful.

By the way, the front panel 6 does not have electricity or not.
A hole is provided for a notification element 8 such as a light emitting diode to notify the progress of cooking, and this hole is usually covered with a hole in a decorative board 7 on which notification contents are printed.

Now, Japan is an environment with large differences in dry and wet conditions, and recently,
An increasing number of households are installing carpets etc. indoors. It is well known that when you walk on dirt such as a carpet, static electricity builds up in your body, just like rubbing a piece of cloth with a cloth.

Depending on the conditions, this static electricity reaches tens of thousands of volts, and when a person who has accumulated this static electricity in their body touches the metal decorative board 7, the static charge escapes into the body through the metal decorative board 7. , that is, discharge.

As is well known from lightning, these discharges are directed towards metal, but on the back of the decorative board 7 there is a control circuit element 3.
are integrated, and naturally these elements have metal legs for conducting electricity. These elements, such as microcomputer elements, which are normally used with a DC voltage of several volts or tens of volts, malfunction or are destroyed by a discharge of tens of thousands of volts. There is an extremely serious problem in that if static electricity accumulated in the human body or the like is discharged to the element, normal cooking or the product will be destroyed, and a structure that solves this problem has been desired.

OBJECTS OF THE INVENTION The present invention solves these serious conventional problems and provides an antistatic device for a cooker that is resistant to static electricity.

Structure of the Invention In order to achieve the above object, the antistatic device for a cooking appliance of the present invention includes a circuit board on which a control circuit element is attached, a non-conductive display board that covers this circuit board, and a non-conductive display board that covers this display board. It is equipped with a metal printing plate attached to the outer surface and a conductor interposed between the printing plate and the conductive part of the cooker main body, and discharges from the outside to the printing plate. An embodiment of the present invention will be described based on the following. In FIGS. 2 to 4, the same members as in the conventional example are given the same reference numerals as in the conventional example, and their explanations will be omitted.

Reference numeral 9 denotes a metal printing plate, which has a plurality of gourds 9a that fit into a display plate to be described later. 1o is the display board and printing board 9 is 9
It has a hole for attaching and detaching a, and is made of a non-conductive resin material. Reference numeral 11 denotes a display board box body made of a resin material, in which a circuit board 2 having a control circuit element 3 is disposed together with the display board 1o, and has a mounting hole 11a. 12 has a head between the printing board 9 and the display board 10, passes through the hole in the display board 1o, penetrates the mounting hole 11a in the display board box body 11, and is a part of the metal cooking device main body 13. This is a conductive screw made of a conductor that reaches the wall 14 which is the conductive part of the conductor. The display board box body 11 is
It is fixed to the cooking device main body 13 with fixing screws 15.

In the configuration described above, to explain how to prevent static electricity from grounding the main body and malfunctioning and destroying the elements 3 for control circuits 1 to 6, the electric charge discharged to the printing plate 9 passes through the conductive screws 12 to the wall 1.
4, the one-way circuit board 2 is covered and shielded by a display board 10 and a display board box body 11 made of a resin material.

Therefore, since static electricity is not discharged to the control circuit element 3, malfunction and destruction of the control circuit element 3 can be prevented.

The 120 conductive screws are sufficiently close to the printing plate 9 and are still continuous with the cooking device main body 13. The length of the wall 14 and the tip of the conductive screw 12 is set so that they pass through the mounting hole of the display board box body 11 and are close enough to each other, but as a result of the discharge experiment, the effect is not good if it is within the lining. I know that there is.

Note that the conductive screws 12 do not necessarily need to fix the display board 10 and the display board box 11, and may have any shape as long as they are not made of an insulating material. In short, it is good if there is a conductor between the printing plate 9 and the cooking device main body 13 to promote discharge.

Effects of the Invention As is clear from the above embodiments, the antistatic device for a cooker according to the present invention particularly includes a conductor made of a metal material between the printing plate and the conductive part of the cooker main body. By installing this, the anti-static properties are significantly improved and it is possible to prevent the cooking device from being destroyed by static electricity.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a cross-sectional view showing a conventional antistatic device for a cooking device, and Fig. 2 is an exploded perspective view of an antistatic device for a cooking device according to an embodiment of the present invention. 3 is a sectional view of the same, and FIG. 4 is a partially cutaway sectional view of the same cooking device. 2... Circuit board, 3... Control circuit element, -9... Printing board, 10... Display board, 12... Conductive screw (conductor). Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 03 Figure 3 Figure 4

Claims (2)

[Claims] (1) A circuit board with control circuit elements attached, a non-conductive display board covering this circuit board, a metal printing board attached to the outer surface of this display board, and this printing board and the cooking device itself. An electrostatic prevention device for a cooker, comprising a conductive part and a conductor interposed in the conductor. (2) The antistatic device for a cooker according to claim 1, wherein the conductor is a conductive screw.