JPS59154094A - Controller - 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 Industrial Application The present invention relates to a control device for washing machines, dryers, dishwashers, etc. used in general households. .

Configuration of conventional example and its problems Conventionally, in this type of control device, as shown in FIG. 1, a printed wiring board 1 for operating means, a printed wiring board 2 for display means,
Generally, the printed wiring board 3 for the control means is separately attached to the top plate 4 of a washing machine or the like. However, with this configuration, the space occupied by the printed wiring boards and the space occupied by the electric wires connecting the printed wiring boards becomes large, and the printed wiring board 3 for the control means, which is crowded with electronic components, is a large board that is difficult to drain water. 4, it is difficult to miniaturize the product and the cost is high.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides a control device that can be miniaturized and cost-reduced in appliances such as washing machines.

Structure of the Invention The control device of the present invention includes an operating means provided on the component side of a printed wiring board, and a control means that is operated by the operating means to control a load. Since the components are arranged on the copper foil side of the printed wiring board and covered with a moisture-proof resin, the area of the printed wiring board can be used effectively.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figs. 2 to 6, 5 is the top plate of the washing machine, 6 is a switch which is the operation means of the control device, 7 is a light emitting diode which is the display means, 8 is an LSI which is the center of the control means, and 9 is a chip shape. 10 is a bidirectional thyristor for directly controlling the load, and 11 is a printed wiring board on which these switches 6 and other components and electronic components are mounted, which is attached to the front of the washing machine. 12 is a moisture-proof resin film that covers the electronic components on the copper foil side of the printed wiring board 11; 13 is a button for pressing the switch 6, which is an operating means; 14 is the printed wiring board 1;
1 is a boss for fixing to the top plate 4, 15 is a pin for fixing the printed wiring board 11 to the boss 14, and 16 and 17 are connectors for connecting a control device and a load.

The chip-shaped small electronic component 9 still includes a transistor 18 or a diode shown in FIG. 7, and a resistor 19 or a capacitor shown in FIG. 8.

The control device requires an operating means that accepts the user's intentions, and for ease of operation, the operating means is required to be exposed at the front of the product as shown in FIG.

In order to reduce the cost of the control device, it is desirable to have a structure in which the operating means, control means, and if necessary, display means are included in one printed wiring board.

An example of realizing this desire is shown in FIG. A switch 6 is arranged on the component side of the printed wiring board 11, the printed wiring board 11 is fixed with a boss 14 and a pin 16, and the switch 6 can be operated with a button 13. The electronic components necessary for the control means are chips. A small electronic component 9 of the same shape is arranged on the copper foil side of the printed wiring board 11 to form a circuit, and in order to ensure performance against humidity, the copper foil side of the printed wiring board 11 is mainly coated with moisture-proof resin. It has a structure covered with a membrane 12.

FIG. 4 is a plan view of one embodiment of the present invention, in which a switch 6 as an operating means and a light emitting diode 6 as a display means are arranged as required. FIG. 5 is a side view of the same embodiment, in which LSI 8 for control means and chip-shaped electronic components 9 are on the copper foil surface side of the printed wiring board 11, and chip-shaped electronic components 9 are on the component side of the printed wiring board 11. A structure in which a switch 6 and a light emitting diode 7 are respectively mounted is shown.

The LSI 5 and chip-shaped small electronic components 9 mounted on the copper foil side of the printed wiring board 11 have the external shapes shown in FIGS. 6 to 8, and have a structure that can withstand automatic mounting and soldering. It is.

In the embodiments shown in FIGS. 4 and 5, the bidirectional thyristor 10, the connector 16, and other parts forming one part of the control means are mounted on the component surface of the printed wiring board 11, but this is not done by soldering or Due to manufacturing constraints such as assembly, the above-mentioned configuration was adopted, and individual measures against humidity and water were taken.

In this way, the small chamber 7 child components 9 and the like are arranged on the copper foil side of the printed wiring board 11 and covered with a moisture-proof resin film, and the switch 6 is provided with moisture-proof and waterproof measures on the component side of the printed wiring board 11.
Since parts such as the connector 16 and the connector 16 are arranged, the area of the printed wiring board 11 can be used effectively. Also, there is no need for electric wires that connect a large number of printed wiring boards as in the past.

In the embodiment, the operating means and the control means are arranged on one printed wiring board 11, but these means may be arranged on a plurality of printed wiring boards.

Effects of the Invention As is clear from the above embodiments, the control device of the present invention has the following features:
In particular, we have adopted small chip-shaped electronic components for the parts that make up the control means, placed them on the copper foil side of the printed wiring board, and applied a moisture-proof resin film over them, making it possible to integrate the control device. It is possible to ensure moisture resistance while achieving
Product miniaturization.

It is possible to reduce costs. In addition, it is possible to automatically attach electronic components, which improves yield rates.

It also has the effect of increasing production efficiency.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of a conventional control device, FIG. 2 is a layout diagram of a control device showing an embodiment of the present invention, FIG. 3 is a side view of the same, and FIG. 4 is a plan view of the same control device. 5 is a side view of the same, FIG. 6 is a perspective view showing the outer shape of the LSI used in the control device of the embodiment of the present invention, FIG. 7 is a perspective view showing the outer shape of the transistor, and FIG. 8 is the same resistor. FIG. 6...Switch (operating means), 8...L
SI (control means), 9... Chip-shaped small electronic component, 11... Printing plate, 12...
Moisture-proof resin membrane. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] It comprises an operating means provided on the component side of the printed wiring board, and a control means operated by the operating means to control the load, and the chip-shaped small electronic component of the control means is attached to the copper foil of the printed wiring board. A control device placed on the front side and covered with a moisture-proof resin film.