JP4753608B2 - Fully automatic washing machine power switch mounting structure - Google Patents

Description

  The present invention relates to a power switch mounting structure provided in an operation part of a fully automatic washing machine, and more particularly to an improvement for improving the operability.

  FIG. 4 is a schematic diagram showing the appearance of a general fully automatic washing machine. In the drawing, a portion denoted by reference numeral 1 is a washing machine body (outer box), and a top cover 2 and a lid 3 are provided on the upper surface thereof. The top front side of the top cover 2 is a driving operation unit for the user to perform a switch operation, and the operation panel 4 is disposed there.

  A circuit board is disposed below the operation panel 4 and inside the main body 1, and on the circuit board, operation control switches corresponding to the pressing portions that indicate the operation contents on the operation panel 4 are provided. A power switch for supplying electricity to the circuit board is also provided.

  By the way, conventionally in such an operation part, the switch for operation control, and the power switch were individually attached to the washing machine main body through the exclusive attachment parts, respectively. Therefore, the mounting of the circuit board and the power switch requires dedicated mounting parts, and further requires a separate mounting operation, which is very inefficient.

  Therefore, in the following publicly known document (Patent Document 1), in order to solve such a problem, a circuit board mounting portion for mounting a circuit board and a power switch mounting portion for mounting a power switch are formed by integral molding. The integrally molded product is attached to the washing machine body via an attachment case.

As a result, the circuit board and the power switch can be attached to the main body of the washing machine at the same time with a single attachment case. This reduces the number of parts and simplifies the work when attaching to the main body. This leads to cost reduction.
JP-A-8-164296

  However, the power switch mounting structure disclosed in the publicly known document has the following problems.

  Usually, the electrical inspection of the circuit board is performed in an assembly process of the circuit board before the circuit board is stored in the storage case.

  That is, if the electrical inspection is performed after the circuit board is stored in the storage case, if an electrical defect such as a continuity failure is found at that time, the storage case to which the defective circuit board is attached is wasted. . Moreover, even if the storage case is reused, it takes time to remove the defective circuit board from the storage case, which leads to a significant reduction in efficiency of the manufacturing process.

  Therefore, as described above, the electrical inspection of the circuit board is performed in the assembly process of the circuit board before the circuit board is stored in the storage case. In the mounting structure, at the time of the assembly and inspection process of the circuit board, the power switch is not mechanically fixed to the circuit board. After the circuit board is stored in the storage case, the power switch is stored in the storage case. It is designed to be attached.

  Therefore, when an electrical inspection is performed, the power switch is difficult to press in a suspended state, resulting in a decrease in work efficiency of the inspection process.

  Therefore, an object of the present invention is to efficiently perform an electrical inspection performed in the circuit board assembly process in the operation unit of the fully automatic washing machine.

In order to solve the above problems, the present invention provides a circuit board on which a plurality of switches for operation control are mounted, and a holding plate provided above the circuit board and provided with an actuator corresponding to each of the switches. And a power switch electrically connected to the circuit board, wherein the circuit board and the power switch are attached to the holding plate, and a lower end of the power switch is provided on the holding plate. It was made to be supported by the part . Therefore, the power switch can be pressed firmly in the electrical inspection before being stored in the storage case. That is, the inspection can be performed efficiently. Here, the reason why the power switch is attached to the holding plate of the actuator is as follows.

  In recent years, for the purpose of reducing the cost, a switch mounted on a circuit board is generally used in a small size. However, since the switch is small, it remains between the pressing surface (upper surface) and the operation panel. Since a space is created, it is necessary to interpose an actuator between the pressing surface of the switch and the operation panel in order to fill the hole.

  At that time, when the power switch is fixed to the storage case of the circuit board as in the invention disclosed in the publicly known document, it is necessary to consider the following tolerances in designing the operation unit. .

  That is, 1) tolerance between the operation panel and actuator, 2) tolerance between the reflector and the circuit board, and 3) three tolerances between the circuit board and the circuit board storage case, in addition to them 4) There are a total of four tolerances for the mounting tolerance of the power switch to the circuit board storage case.

  Therefore, if the design considering these tolerances is not successful, there is a problem that the power switch cannot be pushed smoothly or cannot be pushed at all due to the accumulation of tolerances.

  However, when the power switch is attached to the holding plate of the actuator as in the present invention, the design tolerance to be considered between the control panel and the circuit board is 1) between the operation panel and the actuator. 2) There are only two between the holding plate of the actuator and the power switch, and the design only needs to consider the tolerance of these two.

  If it does so, design will be easier than the case where the tolerance of 4 steps | paragraphs was required conventionally, and the assembly result will also become a high precision thing.

  Therefore, as described above, in the circuit board inspection process, the power switch is fixed to something and the pressing is smoothed to improve the inspection efficiency, and the mounting target is an actuator holding member. As a result, the power switch can be easily and accurately designed with less cumulative tolerances compared to the conventional case where the power switch is attached to the circuit board storage case.

At that time, the supporting portion is provided with a pair of variable Takashi of the strip facing with depending from the lower surface of the holding plate, each of the lower end of the band body, provided the orientation of the pawl towards the strip of opponent is the power switch, Rutotomoni sandwiched the band body, be configured as to be supported by the pawl, mounting of the power switch, is easily removable, and at the same time the work efficiency of the assembly process is increased, the finished Even after it has become a product, when the power switch fails, there is an advantage that it can be easily replaced.

Further, at that time, the support portion includes a support member made of a U-shaped belt body hanging from the lower surface of the holding plate, and the power switch is disposed inside the support member, and the support member if to be supported, the power switch can be stably pressed, if integrated constituting the support member to the holding plate, it is not necessary to prepare a new part.

  Since the present invention is configured as described above, the power switch can be pressed in a stable state in the circuit board assembly process before the circuit board is stored in the storage case, and an efficient inspection can be performed. .

  In addition, since the power switch is attached to the actuator holding plate, the design tolerances to be considered between the control panel and the circuit board are 1) between the operation panel and the actuator, 2) Only two between the holding plate of the actuator and the power switch are required, and the design is easier and the assembly accuracy is higher than the case where four-step tolerances are required in the normal mounting method.

  Therefore, not only the stable operation of the power switch in the assembly process of the circuit board described above, but also the power switch is attached to the circuit board with high accuracy, so that the fully automatic washing machine can smoothly press the power switch even in the finished product. Can be obtained.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded view of components of an operation unit of the fully automatic washing machine according to the first embodiment. 1A is a plan view of the operation unit with the operation panel omitted, FIG. 1B shows a cross section taken along line AA in FIG. 1A with the operation panel 4 attached, and FIG. A part of the right side view of (a) is shown.

  As shown in FIG. 1B, in this embodiment, an actuator holding plate 6 holding an actuator 5 is disposed immediately below the operation panel 4, and a circuit board is further directly below the actuator holding plate 6. 7 is disposed, and the circuit board 7 is housed in a circuit board housing case 8.

  The circuit board 7 is sandwiched in the width direction by a (resin) band-shaped holding member 9 that is integrally suspended from the lower surface of the actuator holding plate 6 made of resin, and the latching claw at the lower end of the holding member 9 9a is engaged and attached to the surface of the circuit board 7 in a state where it is attached to the holding member 9 at a position corresponding to each actuator 5 of the actuator holding plate 6 for operation control. The switch 10 is attached.

  A pair of (resin) band-shaped holding members 11 facing the left and right direction of the drawing are suspended from the lower surface of the protruding portion of the actuator holding plate 6 that protrudes from the circuit board storage case 8 at the right end of the drawing. A locking claw 11a is provided at the lower end. The opposing distance of the pair of holding members 11 is substantially equal to (slightly larger) the thickness of the power switch 20 (microswitch), and the power switch 20 is narrower than the pair of holding members 11 in the thickness direction. It is held and attached to the locking claw 11a at its lower end.

  As described above, in this embodiment, since the power switch is attached to the holding plate of the actuator, the power switch can be firmly pressed in the electrical inspection before being stored in the storage case.

  At the same time, the power switch is attached to the holding plate of the actuator, as described above, so that the design tolerance to be considered between the control panel 4 and the circuit board 7 is 1) 2) Between the operation panel and the actuator, 2) Between the holding plate of the actuator and the power switch, it is only necessary to design, and the assembly result is also easier than in the case where four tolerances are required as in the past. High accuracy.

  Accordingly, it is possible to significantly reduce the occurrence of a situation in which the power switch is attached to the circuit board and the power switch is not smoothly pressed or even pressed.

(Second Embodiment)
FIG. 2 shows a second embodiment of the present invention. 2nd Embodiment adds the structure which supports it further about the attachment structure of the power switch 20 with respect to 1st Embodiment.

  FIG. 2A is drawn with the operation panel 4 excluded from FIG. 1B, but the other difference from FIG. 1B is the attachment part of the power switch 20. FIG. 2B is a part of the side surface of FIG. 2A, and FIG. 2C shows a state where the power switch 20, the circuit board 7, and the circuit board storage case 8 are removed from FIG. It is shown. (D) shows a part of the side surface of (c).

  2, in addition to the switch mounting holding member 11 in FIG. 1B, a support member 12 for supporting the power switch 20 is further provided. The support member 12 is arranged in a shape in which a U-shaped band-like member is suspended in a plane parallel to the opposing surfaces of the pair of holding members 11 that directly hold the power switch 20. 20 is directly held by the holding member 11 and is also supported by the inside of the U-shape. Accordingly, when the power switch 20 is pressed, the support member 12 for supporting the support stabilizes the pressing action, and the risk of dropping from the holding member 11 is reduced.

  Since the second embodiment has such a configuration, the power switch 20 can be stably pressed. And since it was set as the structure integrated with the actuator holding | maintenance board 6, it is not necessary to produce a new component for the support structure formation.

(Third embodiment)
The third embodiment shows another example of the support structure of the power switch 20 exemplified in the second embodiment, and FIG. 3 shows the third embodiment.

  FIG. 3A shows a projecting portion 8a in the circuit board storage case 8 in place of the U-shaped belt-shaped holding member 12 provided on the lower surface of the actuator holding plate 6 as the supporting structure in FIG. The power switch 20 is provided so as to support the power switch 20 at that portion. FIG. 3 (b) shows the circuit board storage case 8 provided with the supporting projections 8a alone taken out.

  Also in the third embodiment, the power switch 20 can be stably pressed by the structure for supporting the power switch 20, and the structure for supporting the power switch 20 is integrated with the circuit board storage case 8. There is an advantage that it is not necessary to produce a new part for forming the supporting structure.

  The present invention is widely applicable to general fully automatic washing machines.

(A) is a plan view showing a state in which the operation panel is removed from the operation unit of the first embodiment, (b) is a sectional view taken along line AA in (a), and (c) is (a ) Is a partial side view. Shows a second embodiment, (a) shows a portion corresponding to a cross section taken along line AA of the plan view of the first embodiment, (b) shows a side view of (a). Part (c) shows a part of the side surface of (c), (c) shows only the actuator holding plate by removing the circuit board and its storage case from (a). (A) shows a cross-sectional view of a state in which the operation panel is removed from the operation unit of the third embodiment, and (b) shows only a storage case of the circuit board in a cross-sectional view. These are the simplified schematic diagrams which show the external appearance of a general fully automatic washing machine.

Explanation of symbols

4 Operation Panel 5 Actuator 6 Actuator Holding Plate 7 Circuit Board 8 Circuit Board Storage Case 8a Projecting Portion (of Circuit Board Storage Case) 9, 11 Holding Member 9a, 11a Locking Claw 10 Operation Control Switch 12 Support Member

Claims (4)

A circuit board on which a plurality of switches for operation control are mounted;
A holding plate disposed above the circuit board and provided with an actuator corresponding to each of the switches;
A power switch electrically connected to the circuit board,
The circuit board and the power switch are attached to the holding plate,
A power switch mounting structure for a fully automatic washing machine, wherein a lower end of the power switch is supported by a support portion provided on the holding plate. In the power switch mounting structure according to claim 1,
The support portion includes a pair of flexible strips that hang from the lower surface of the holding plate and face each other,
At each lower end of the band, a claw directed to the opponent's band is provided,
A power switch mounting structure for a fully automatic washing machine, wherein the power switch is sandwiched between the belts and supported by the claws. In the power switch mounting structure according to claim 1 or 2,
The support portion includes a support member made of a U-shaped band body depending from the lower surface of the holding plate,
The power switch mounting structure for a fully automatic washing machine, wherein the power switch is disposed inside the support member and supported by the support member. In the power switch mounting structure according to any one of claims 1 to 3,
A storage case for storing the circuit board;
A power switch mounting structure for a fully automatic washing machine, wherein the circuit board is disposed between the storage case and the holding plate.

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