JPS61232894A - Operation controller of washing machine - 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 [Technical Field of the Invention] The present invention relates to an operation control device for a washing machine provided with a fireproof structure for electrical parts that may catch fire.

[Technical background of the invention and its problems] In recent years, washing machines whose operation is electronically controlled have been provided.
Electrical (electronic) components for wJ are mounted on a board such as a printed circuit board, and are arranged together with the board on the back side of the control panel. For electrical parts arranged in this way,
There is a problem of short circuits due to deterioration of these parts.
This may cause combustion and ignition, especially in high-voltage components such as resistors, and the fire may spread to the control panel and its surroundings. As a countermeasure for this, for example,
As shown in Japanese Patent No. 58, a flameproof plate is proposed between the electrical components and the control panel. However, in this case, if the display light emitting diode etc. in the electrical component is covered with a flameproof plate, the light emitted by it will be blocked and the display will be unclear.
As a result, holes for light transmission are drilled in the flameproof plate at locations corresponding to the display light emitting diodes, etc., which prevents flames from coming out and spreading the fire to the $ control panel and its surroundings. There was a problem that could not be avoided.

[Objective of the Invention] The present invention has been made in view of the above-mentioned circumstances, and therefore, its object is to provide an excellent structure that does not interfere with the display by light emitting diodes, etc., and which also provides a reliable effect of preventing the spread of fire. The present invention provides an operation control device for a washing machine.

SUMMARY OF THE INVENTION 1 The present invention comprises a first board on which mainly low-voltage parts such as light emitting diodes for display among electrical parts for operation control are mounted, and a second board on which mainly high-voltage parts such as resistors are mounted. The first board is located on the control panel side, the second board is located on the opposite side of the control panel, and the second board is located on the back side of the control panel. The part of the circuit board that is further away from the control panel is covered with a flameproof cover, so that light-emitting diodes, etc. are not covered with a flameproof plate, and high-voltage parts such as resistors, that is, parts that have a risk of ignition, are It is characterized in that it is sufficiently covered with a flameproof plate and a flame-retardant substrate.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

In the figure, numeral 1 is a cover that constitutes the upper surface of the washing machine main body, and has a horizontally elongated recess 2 formed in its front edge. On the other hand, 3 is a control panel, for example, an elastic tongue-shaped operating section 4.
At the same time, a transparent part 5 is formed, and a box-shaped part 6 is formed on the back side thereof, and claws 7, 8, etc. for attachment are also formed.

9 is a first flameproof plate, 10 is a second flameproof plate, of which the first flameproof plate 9 has a box shape, and the second flameproof plate 10 has a cylindrical shape, The second flameproof plate 10 is attached to the inner wall surface of the box-shaped portion 6 of the control panel 3. 11 is a first substrate, 12 is a second substrate, among which the first substrate 11
Among the various electrical components for operation control, mainly low voltage components such as a light emitting diode 13 for display and a tact switch 14 are mounted on the second substrate 12, and high voltage components such as a resistor 15 are mainly mounted on the second substrate 12. . The first board 11 is arranged so that the light emitting diode 13 among the mounted electrical components faces the transparent part 5, and the tactile switch 14 faces the operating part 4, and the second flameproof plate 10 is installed inside the box-shaped part 6 of the control panel 3, that is, on the back side of the control panel 3, and the second board 12 connects the mounted electrical components with the electrical components mounted on the first board 11. On the contrary, the above-mentioned ff, II t[I are positioned on the opposite side of the control panel 3 (lower side in the figure), and the above-mentioned ff, II t [I It is placed on the panel 3 side. In addition, 16 is a first substrate length interposed between the control panel 3 and the first substrate 11, and 17 is a second substrate interposed between the first substrate 11 and the second substrate 12. In addition, 18 is a third spacer, and this third spacer 18 is interposed between the box-shaped portion 6 and the second substrate 12. The first flameproof plate 9 is attached to the lower end, and the second board 12
The part on the side opposite to the control panel 3 is covered by a first flameproof plate 9. Thereafter, the control panel 3 is attached to the cover 1 by the claws 7 and 8 so that they are accommodated in the four parts 2 of the cover 1.

Now, in the case of the configuration as described above, among the various electrical components for operation control, high-voltage components that have a risk of ignition, such as the resistor 15, are separated from low-voltage components and are mainly mounted on the second board 12. In this state, the second board 12 is placed further away from the control panel 3 than the first board 11 on which low-voltage components are mounted.
In addition, since the second board 12 itself has a structure in which its portion on the side opposite to the control panel 3 is covered with the first flameproof plate 9, there is a risk that the resistor 15 and the like may catch fire. The high-voltage components having the Even the first board 11 has flame retardant properties as a characteristic of the board, so even if that high voltage component ignites, it will not be the first board 11.
and the first flameproof plate, and thus the spread of fire to the surrounding areas such as the control panel 3 and the cover 1 can be reliably prevented. Furthermore, in this case, the low voltage components such as the light emitting diode 13 and the switch 14 mounted on the first board 11 are not covered by either the first protrusion prevention plate 9 or the second flameproof plate 10. The light-transmitting part 5 and the operation part 4 of the control panel 3 can be directly faced, so that the light display by the light emitting diode 13 can be ensured, and the tact switch 14 can be operated reliably. And above all, since it is possible to eliminate the need to make holes for light transmission or operation in the first and second flameproof plates 9.10, the above-mentioned effect of preventing the spread of fire is even more reliable. I can tighten it.

In addition to the above, especially in the case of the above embodiment, it has not only the first flameproof plate 9 but also the second flameproof plate 10, which is mounted on the second board 12. Since it is attached to the inner wall surface of the box-shaped portion 6 of the control panel 3 where high-voltage components exist, the spread of fire can be further prevented.

Furthermore, since the second board 12 is arranged so that the mounted electrical components are located on the side opposite to the control panel 3, this contributes to preventing the spread of fire to the second board 12. Therefore, a more reliable effect of preventing the spread of fire can be obtained.

However, the present invention is not limited to the embodiments described above and shown in the drawings, and therefore the second flameproof plate 1 described above
0, the arrangement structure of the second board 12, etc. may be different from those described above, and the first board 11 may have not only low voltage components but also some high voltage components mounted thereon. The second board 12 may include not only high-voltage components but also some low-voltage components, and may be modified as appropriate without departing from the spirit of the invention.

[Effects of the Invention] As is clear from the above description, according to the present invention, the cleaning BIa which has a fireproof structure for electrical parts that are likely to catch fire.
This operation control device has an excellent effect in that it has a structure that does not interfere with the display etc. by the light emitting diodes, and can also achieve a reliable effect of preventing the spread of fire.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of the main part, and FIG. 2 is an exploded perspective view of the rotating part. In the figure, 3 is a control panel, 9 is a first flameproof plate, 11 is a first board, 12 is a second board, 13 is a light emitting diode (low voltage component), 14 is a tact switch (low voltage component), 15
does not indicate resistance (high voltage components). Applicant Toshiba Corporation Figure 1

Claims (1)

[Claims] 1. The operation of the washing machine can be controlled by various electrical parts mounted on a board, and the board is equipped with mainly low-voltage parts such as display light emitting diodes among the electrical parts. The first board is divided into a first board on which high voltage components such as resistors are mounted, and the first board is located on the control panel side, and the second board is located on the opposite side of the control panel. 1. An operation control device for a washing machine, characterized in that the device is disposed on the back side of a control panel, and a portion of the second board on the opposite side of the control panel is covered with a flameproof cover.