JPH041913Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electronic device control device mounting device for an electronically controlled washing machine, and particularly to a mounting configuration for an operation panel portion.

BACKGROUND OF THE INVENTION In recent years, with the development of electronics, many washing machines are being developed that are controlled by printed circuit boards equipped with electronic timers and the like, so-called controller units.

Unlike conventional mechanical timers, etc., this controller unit must be handled with great care, and if pressure is applied locally or water gets on it, the copper foil should be removed immediately. This may cause pattern breakage or leakage, resulting in malfunction.

Problems to be Solved by the Invention However, conventional devices require a means to protect the controller unit when it is assembled into a product or when it is disassembled for repair.

The present invention aims to solve these problems and relates to an electronic device mounting device that makes it easy to incorporate a controller unit and is easy to handle during repair.

Means for Solving the Problems In order to achieve the above object, the electronic device mounting device for a washing machine of the present invention includes a controller unit made of an electronic device, etc. and formed of a printed circuit board, and a controller unit to cover the controller unit. It has a U-shaped waterproof wall and an opening provided on the operation panel for inserting the controller unit, and the waterproof wall has a stepped portion having a sloped portion at the upper part thereof, and a guide provided near the opening. This configuration includes a guide protrusion A that engages with a protrusion B.

Effects According to the above configuration, ease of assembly and repair can be improved because the controller unit covered with a waterproof wall is inserted. Further, the opening is reinforced by the protrusions A and B, and a sloped portion is provided to facilitate insertion.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIG. 2, 1 is an outer box of the main body, and 2 is a pedestal, on which a motor (not shown) is attached to drive the stirring blades and dehydration basket.

Reference numeral 3 denotes a water tank installed from the top of the main body outer box 1, in which a washing tank 4 and a dehydration tank 5 are arranged, a panel stand 7 for storing electrical components such as a power switch 6 is installed at the rear, and a panel stand 7 for storing electrical components such as a power switch 6 is installed at the front. An operation panel 8 is attached.

9 is a pneumatic water level switch, and 10 is a pressure hose connected to an electromagnetic water supply valve (not shown).

The operating section is as shown in FIG. That is, the operation plate 8, which is made of a highly flexible material such as resin, has a plurality of hook parts 11 on the upper part, and a plurality of claw parts 1 on the lower part.
2 are integrally provided, and are engaged and fixed to the stepped portion 13 and the outer peripheral flange portion 14 of the water tank 3 so as to be freely fitable therein. Reference numeral 15 denotes a switch plate that is attached through a hole 16 that is a substantially rectangular opening provided in a part of the operation plate 8 and is fixed to the operation plate 8 by welding or the like, and has a switch plate 17 on the top surface. is attached, and the back side has a substantially U-shaped waterproof wall 20 to be installed in the space between the notch 18 provided in a part of the water tank 3 and the dehydration receiver 19, and 21
A button part 23 is connected at one end by a substantially U-shaped rib 22, and a plurality of boss parts A are integrally provided.

24 is a signal printed circuit board covered with an insulating coating material 35, 25 is a power printed circuit board which is also insulated, and is connected to a flat cable 26.
An insulating plate 27 made of an insulating material such as resin is sandwiched between the two printed circuit boards on the copper foil pattern side.

On the other hand, the signal switch 2 is mounted on the signal printed circuit board 24 facing the button part 21 of the switch board 15.
8. An LED block 29 for time display is mounted, and a transformer 3 is mounted on the power supply printed circuit board 25.
0, a capacitor 31, a lead wire 32 connected to electrical components such as a motor and a switch, etc. are mounted.

33 is a waterproof cover fixed to the switch board 15 to cover these printed circuit boards, and screw A34
It is screwed and fixed to the boss portion A23 at.

The screw B36 is screwed and fixed to the switch plate 15 via the boss portion B37 of the insulating plate 27 with the power printed circuit board 25 being shifted downward.

Reference numeral 38 denotes a holding rib protrudingly formed on the side of the signal printed circuit board 24, with which one end of the signal printed circuit board 24 is brought into contact.

On the other hand, a stepped portion 39 is provided on the upper longitudinal side of the waterproof wall 20.
The distal end portion 40 is chamfered, and the other side is provided with a slope portion 41 having a substantially sloped surface, 42 is a guide protrusion A extending in the longitudinal direction, and 43 is formed in a direction opposite to this guide protrusion 42. A substantially triangular guide rib is engaged with and held by a guide protrusion B44 protruding from the upper back surface of the notch 18 of the water tank 3.

Reference numeral 45 denotes a guide section disposed above the waterproof cover 33 in the longitudinal direction, and its tip is approximately recessed to form a stepped section 39.
The side walls 46, which engage the back surface and are arranged on both sides, are installed inside the substantially U-shaped waterproof wall 20 and are formed in a shape to cover both printed circuit boards.

Further, the insulating plate 27 is formed with almost the same projected area as the power supply printed circuit board 25, and 47 is a plurality of reinforcing ribs arranged on the back side wall of the dehydration receiver 19;
is a dehydrated hatch.

Reference numeral 49 indicates a cut portion for escaping the flat cable 26.

The effects of this embodiment will be explained below.

If an automatic two-tub washing machine that performs everything from washing to rinsing and draining is computerized by applying microcontrollers,
The controller unit, which includes a printed circuit board and the like, becomes very large and requires a correspondingly large storage space.

Furthermore, controller units can be broadly divided into microcurrent signal circuits used in microcomputers and the like, and power supply circuits connected to motors and the like.

In general, signal circuits are susceptible to noise and the like, and if they are patterned on the same substrate as a power supply circuit, there is a concern that there will be adverse effects such as malfunctions, so it is preferable to form them separately into a signal printed circuit board and a power supply printed circuit board.

Therefore, in one embodiment of the present invention, the purpose is to efficiently store and form such a printed circuit board divided into two parts. First, the holding structure of the controller unit will be described.

By stacking the printed circuit boards, which are divided into two parts for signals and power and shifted vertically, space can be used effectively even in places with little depth.

In addition, the overlapping surface is not the mounting surface of large electronic components, but the copper foil pattern circuit side has excellent adhesion, but by interposing an insulating plate between both printed circuit boards, more safety considerations can be made. can do.

However, since the power supply printed circuit board held in a downward position is made up of heavy components such as transformers, it has a considerable weight, and the signal printed circuit board may be affected by shock during transportation or dehydration vibration due to unbalance. Problems such as cracking of the printed circuit board in parts that protrude downward from the board and copper foil pattern breakage are likely to occur.

Therefore, as shown in the example, the strength of the printed circuit board is improved by extending the insulating plate to approximately the same projected area as the power printed circuit board, and further by arranging a holding rib that engages the lower end of the signal printed circuit board. Stress concentration due to the bending of the power supply printed circuit board that has been shifted downward can be reduced.

In addition, although the printed circuit board is coated with insulation, the joints of lead wires, heat dissipation fins, etc. are exposed, so a waterproof structure is required. The U-shaped waterproof wall and waterproof cover serve this purpose.

Here, downward settling of the stepped portion 13 at the top of the notch poses a problem, but this can be prevented by the guide protrusions A and B.

Further, downward settling of the operation plate 14 can be prevented by engaging the upper end of the outer peripheral flange portion 14 with the rib 50.

Next, the order of assembling the operation board with this controller unit attached is to first insert the power printed circuit board side into the notch 18, pass it through the waterproof wall of the switch board, and then insert the hook part 11 and The claw portions 12 are engaged with each other, and the operation plate is screwed and fixed to the aquarium body through screw holes provided at both ends of the operation plate.

At this time, the insulating plate 27 and the holding rib 38 protect the printed circuit board during insertion to prevent damage, etc. Furthermore, by making the upper part of the waterproof wall a step, the controller unit can be moved upward to save space. Even if it is used, it will be difficult to insert it during insertion and disassembly, and the guide protrusion B will get in the way, making workability worse, but by chamfering the tip of the step,
The provision of the sloped portion 41 allows for easy attachment and detachment, and the triangular guide ribs also allow for easy attachment and detachment of the guide protrusions.

Effects of the Invention As described above, according to the present invention, the controller unit formed of a printed circuit board etc. can be prevented from being damaged by a simple structure such as providing a guide protrusion A and a stepped part with an inclined surface on the waterproof wall. , which saves space and improves safety and ease of assembly.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
Figure 2 is an external perspective view showing the washing machine of the present invention;
The figure is a perspective view of the operation section excluding the operation plate, and FIG. 4 is an exploded perspective view of the same. 8... Operation panel, 18... Notch, 20... Waterproof wall, 39... Stepped part, 41... Slope part, 42...
Guide protrusion A, 44... Guide protrusion B.

Claims (1)

[Scope of utility model registration request] A controller unit formed of a printed circuit board or the like that controls the operation of the washing machine using an electronic device, etc., a substantially U-shaped waterproof wall to cover the controller unit, and an operation panel provided to insert the controller unit. with an opening,
An electronic equipment mounting device for a washing machine, wherein a stepped portion having a sloped portion is provided at the upper part of the waterproof wall, and a guide protrusion A that engages with a guide protrusion B provided near the opening is provided.