JPH041912Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an electronic equipment mounting device on the operation panel of a washing machine that is controlled by electronic equipment.

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 pattern This may cause breakage or leaks, resulting in malfunction.

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

The present invention is intended to solve these problems, and its main purpose is to provide a protective structure for a controller unit, which is an electronic device mounted on an operation panel.

Means for Solving the Problems In order to achieve the above object, the washing machine electronic equipment mounting device of the present invention comprises a controller unit consisting of electronic equipment etc. for controlling the operation of the washing machine, which is composed of at least two or more printed circuit boards. These printed circuit boards are held and fixed in a vertically shifted state, and an insulating plate is interposed between these printed circuit boards, and this insulating plate is provided with a holding rib that engages with the lower end of the printed circuit board located above. , and has approximately the same projected area as the printed circuit board located below.

Function According to the above configuration, since the printed circuit boards are shifted from each other, it can be stored in a place with little depth, and safety is improved by interposing an insulating plate. Furthermore, the use of an insulating plate with the same projected area as the lower printed circuit board improves the strength of the printed circuit board, and the holding ribs reduce stress concentration caused by deflection of the printed circuit board.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIG. 2, reference numeral 1 indicates an outer box of the main body, and reference numeral 2 indicates a pedestal, on which a motor and the like (not shown) are 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).

Next, the operation section will be explained with reference to FIGS. 1, 3, and 4. That is, the operation plate 8 made of a highly flexible material such as resin is integrally provided with a plurality of hook parts 11 at the upper part and a plurality of claw parts 12 at the lower part. Stepped part 1
3 and the outer periphery flange portion 14 in a freely fitting manner. Reference numeral 15 denotes a switch plate that is attached through a substantially rectangular hole 16 provided in a part of the operation plate 8 and is fixed to the operation plate 8 by welding or the like, and a switch plate 17 is attached to the upper surface. 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 dewatering receiver 19, and 21 has one end shaped like a substantially U-shape. The button part 23 is connected by a shaped rib 22, and a plurality of boss parts A are each 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, a signal switch 28, an LED block 29 for time display, etc. are mounted on the signal printed circuit board 24 facing the button part 21 of the switch board 15, and a transformer 30, a capacitor 31, etc. are mounted on the power supply printed circuit board 25. Also mounted are lead wires 32 and the like that are connected to electrical components such as motors and switches.

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 engaged.

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, the tip of which is approximately concave to form a stepped section 3.
The side walls 46, which are disposed on both sides and are in contact with the back surface of the waterproof wall 20, 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 electronic device mounting device for a washing machine configured as described above will be described in more detail.

In general, when an automatic two-tub washing machine that performs everything from washing to rinsing and draining is computerized using a microcomputer, the controller unit with a printed circuit board becomes extremely large, and a correspondingly large storage space is required.

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 two printed circuit boards, one for signals and one for power, shifted vertically and stacked on top of each other, space can be used effectively even in areas with limited 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 that is held in a downward position is made up of heavy components such as transformers, it has a considerable weight and is subject to shocks and shocks during transportation.
Alternatively, vibrations caused by dehydration during unbalance can easily cause problems such as cracking of the printed circuit board at a portion that protrudes downward from the signal printed circuit board or breakage of the copper foil pattern.

Therefore, as shown in the embodiment, 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 furthermore, a holding rib is arranged to engage the lower end of the signal printed circuit board. This makes it possible to reduce stress concentration caused by the bending of the power supply printed circuit board that has been shifted downward.

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, but this is not shown in the example. 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.

In addition, the rib 50 prevents the operation plate 14 from sagging downward.
This can be prevented by engaging the upper end of the outer peripheral flange portion 14.

Next, the order of assembling the operation board with this controller unit installed is to first insert the power supply 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, respectively, and are 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 and prevent it from being damaged.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 etc. will get in the way, making workability worse, but by chamfering the tip of the stepped part and providing the sloped part 41, it can be easily attached and detached. As a result, the triangular guide ribs allow the guide protrusions to be fitted together and removed easily.

Effects of the invention As described above, according to the invention, the printed circuit boards are arranged in a staggered manner, an insulating plate is interposed between them, and the insulating plate is provided with an operation rib, and the projected area is approximately the same as the lower printed circuit board. With this simple configuration, it is possible to save space and improve safety and assembly without damaging the controller unit formed of a printed circuit board or the like.

[Brief explanation of drawings]

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 with the operation plate removed, and FIG. 4 is an exploded perspective view of the same. 24... Signal printed circuit board, 25... Power printed circuit board, 27... Insulating plate, 38... Holding rib.

Claims (1)

[Scope of utility model registration request] The controller unit that controls the operation of the washing machine using electronic equipment, etc. is composed of at least two printed circuit boards, and these printed circuit boards are held and fixed in a vertically shifted state, and there is an insulating layer between these printed circuit boards. Interpose a plate,
This insulating plate is provided with a holding rib that engages with the lower end of the printed circuit board located above, and has approximately the same projected area as the printed circuit board located below.