JPH09140995A - Fully automated washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount an air lead pipe on a water receiving tank simply without requiring so much manhour of production and to restrain the generation of hammering sounds while preventing an air trap of the air lead pipe from slipping off a connection port. SOLUTION: A support rib 54 is provided on a side wall of a water receiving tank 42 which houses a washing/spin-drying tank 46 and is hoisted elastically in an outer box 32 to support an intermediate part of an air lead pipe 38 elastically free to load or unload with one end thereof connected to a water level sensor 36 for detecting a water level within the tank and the other end thereof connected to a connection port 52 of the air trap 51. So, the support rib 54 can be used to mount the intermediate part of the air lead pipe 38 on the water receiving tank 42. Thus, the air lead pipe 38 will not oscillate significantly because the intermediate part is constrained even when the water receiving tank 42 happens to rock with the rotation of the washing/spin-drying tank 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine in which the water level in a water receiving tub is detected by the pressure in an air trap introduced through an air outlet tube.

[0002]

2. Description of the Related Art Conventionally, in order to detect the water level in a water receiving tub of a fully automatic washing machine, an air trap is provided in the water receiving tub, and this air trap and a water level sensor provided in a top cover on an outer box are used. Was connected by an air outlet pipe, and the water level was detected by detecting the pressure in the air trap with a water level sensor.

Both ends of the air outlet pipe are fixed to the air trap and the water level sensor, and the middle portion is supported as follows. Hereinafter, description will be made with reference to FIGS. 11 and 12. FIG. 11 is a sectional view of the fully automatic washing machine.
2 is a perspective view of a main part.

In FIGS. 11 and 12, reference numeral 1 denotes a fully automatic washing machine, in which an outer box 2 has a top cover 3 having an unillustrated laundry entrance and exit at the upper end thereof, and a water level sensor at the rear of the top cover 3. 4 is built in, and one end of an air outlet pipe 5 made of an elastic material is connected to the pressure detection port of the water level sensor 4. Further, an elastic suspension mechanism 8 is provided inside the outer box 2 and is provided with a suspension rod 6 and an elastic support portion 7.
The water receiving tank 9 is elastically suspended. In the elastic suspension mechanism 8, the upper end of the suspension rod 6 is supported by the upper corner portion of the outer box 2, and the water receiving tank 9 is attached to the lower end of the suspension rod 6 via the elastic support portion 7 on the outer surface thereof. Support arm 10 provided at the bottom
It is designed to be elastically supported by.

A washing / dehydrating tub 12 having a large number of dewatering holes 11 formed in its peripheral wall is rotatably housed inside the water receiving tub 9, and the inner bottom of the washing / dehydrating tub 12 is not shown. A stirrer is provided. Further, a motor 13 and a mechanism section 14 for transmitting the rotational force of the motor 13 to the washing / dehydrating tank 12 and the agitator are arranged on the outer bottom of the water receiving tank 9.
Furthermore, a drain valve 15, a drain hose 16 and the like are provided.

On the other hand, an air trap 17 is provided on the lower portion of the side wall of the water receiving tank 9, and an air outlet pipe having an intermediate portion wound around the suspension rod 6 is provided at a connection port 18 opening at the upper portion of the air trap 17. The other end of 5 is connected. further,
The middle portion of the air outlet pipe 5 is fixed to a fixing rib 20 having a fixing hole 19 projecting in the vicinity of the connection port 18 on the side surface of the water receiving tank 9 at a portion on the other end side of the winding portion around the suspension rod 6. It is fixed by a bind wire 21 which is fixed through the hole 19. Reference numeral 22 is a pipe stopper attached to prevent the other end of the air outlet pipe 5 connected to the connection port 18 from coming off.

With the above-described structure, when each washing process progresses and the dehydration operation is performed, when the laundry stored in the washing / dehydrating tub 12 is out of balance, the washing / dehydrating tub 12 When is rotated, the water receiving tank 9 swings greatly,
With the movement of the water receiving tank 9, the intermediate portion of the air outlet pipe 5 and the connecting end portion of the air trap 17 to the connecting port 18 also swing. If there is a slack in the winding of the middle portion of the air outlet pipe 5 around the suspension rod 6, the air outlet pipe 5 may swing greatly and strike the side wall of the water receiving tank 9 to generate a knocking sound.

Therefore, the intermediate portion on the other end side of the air lead-out pipe 5 is fixed to the fixing rib 20 by the bind wire 21 so as to suppress the generation of the hitting sound. Further, since the air lead-out pipe 5 is fixed by the bind wire 21, the other end of the air lead-out pipe 5 can be prevented from coming off from the connection port 18 of the air trap 17 even if the middle part thereof swings. However, the work of fixing the air lead-out pipe 5 to the fixing rib 20 by the bind wire 21 is poor in workability, and much labor is required for assembly, resulting in an increase in manufacturing man-hours.

[0009]

As described above, the hitching noise is suppressed by fixing the air outlet pipe to the fixed rib of the water receiving tank by the bind wire, and the air is led out from the air trap connection port. Although the pipe is prevented from coming off, the work of fixing it with the bind wire is poor in workability and requires a lot of time and labor to increase the number of manufacturing steps. The present invention has been made in view of such a situation, and the air outlet pipe can be easily attached to the water receiving tank without requiring a large number of manufacturing steps. An object of the present invention is to provide a fully automatic washing machine capable of preventing the pipe from coming off from the connection port of the air trap.

[0010]

SUMMARY OF THE INVENTION A fully automatic washing machine of the present invention is provided with an air trap in a water receiving tub which accommodates a washing and dehydrating tub and is elastically suspended in an outer box. In a fully automatic washing machine in which pressure is introduced to a water level sensor through an air outlet pipe to detect the water level in the water receiving tank, the water receiving tank detachably elastically supports an intermediate portion of the air outlet tube on a side wall. It is characterized in that it is provided with a supporting portion, and further, the supporting portion is characterized in that a plurality of side walls of the water receiving tank are provided, and
An air trap is provided in a water receiving tank that accommodates a washing and dehydrating tank and is elastically suspended in an outer box, and the pressure in this air trap is led to a water level sensor through an air outlet pipe, In a fully automatic washing machine for detecting the water level, the water receiving tub is provided with a support portion having a support hole for inserting and fixing an air outlet pipe in a side wall, and An air trap is installed in the water receiving tank that houses the dewatering tank and is elastically suspended in the outer box, and the pressure in this air trap is led to the water level sensor via the air outlet pipe, and the water level in the water receiving tank In the fully automatic washing machine for detecting the water content, the water receiving tub has a groove portion on the side wall for accommodating the intermediate portion of the air outlet pipe, and the opening portion of the groove portion is closed by a lid member. Is to

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a sectional view of the fully automatic washing machine, and FIG.
FIG. 3 is a perspective view of a main part, and FIG. 3 is an enlarged partial plan view.

1 to 3, reference numeral 31 denotes a fully automatic washing machine, which has a top cover 33 having a laundry inlet / outlet (not shown) at the upper end of an outer box 32 and a bottom 4 at the lower end. Legs 34 are provided at the corners. The top cover 33 is provided with a control part (not shown) for controlling the washing process at the front part, and an outer lid 35 for opening and closing the laundry entrance / exit. Further, a water level sensor 36 is built in the rear portion of the top cover 33, and one end of an air outlet pipe 38 made of an elastic material is connected to a pressure detection port 37 of the water level sensor 36.

Inside the outer case 32, a water receiving tank 42 made of synthetic resin is elastically suspended by an elastic suspension mechanism 41 which is provided with a suspension rod 39 and an elastic support portion 40. The elastic suspension mechanism 41 has a reinforcing support plate 43 in which the upper end of the suspension rod 39 is provided at four corners of the upper end opening of the outer box 32.
Further, an elastic support portion 40 in which a spring (not shown) is installed is provided at the lower end portion of the suspension rod 39, and a water receiving tank 42 is provided below the outer surface of the elastic support portion 40 via the elastic support portion 40. The member 44 is elastically supported.

A washing / dehydrating tub 46 having a large number of dewatering holes 45 formed in its peripheral wall is rotatably housed inside the water receiving tub 42, and the inner bottom of the washing / dehydrating tub 46 is not shown. A stirrer is provided. On the other hand, a motor 47 and a mechanism 48 for transmitting the rotational force of the motor 47 to the washing / dehydrating tank 46 and the agitator are arranged on the outer bottom of the water receiving tank 42, and further, a drain valve 49 and a drain hose. 50 etc. are arranged. The mechanism portion 48 is configured to have a clutch mechanism for switching the transmission of the rotational force to the washing / dehydrating tub 46 and the stirring body, a brake device for braking and releasing the washing / dehydrating tub 46, and the like.

Further, an air trap 51 is provided in the lower portion of the side wall of the water receiving tank 42, and a connection port 52 opening in the upper portion of the air trap 51 is wound around the middle portion thereof so that the hanging rod 39 is not loosened. The other end of the obtained air outlet pipe 38 is connected. A pipe stopper 53 is attached to the other end of the air outlet pipe 38 connected to the connection port 52 to prevent the air outlet pipe 38 from coming off.

A supporting rib 54, which is a supporting portion, is provided on the side wall of the water receiving tank 42 near the upper side of the connection port 52 of the air trap 51 by integral molding. The air lead-out pipe 38 is detachably and elastically supported by the projecting support rib 54 at a predetermined position on the other end side of the suspension rod 39 winding portion in the middle thereof. That is, the support rib 54
Has a hole diameter smaller than the outer diameter of the air outlet tube 38, for example, a support hole 55 having a hole diameter of 7 mm when the outer diameter of the air outlet tube 38 is 8 mm. The mounting opening 56 is formed.
The air outlet pipe 38 is attached by being inserted into the support hole 55 from the mounting opening 56.

Further, in the above-described structure, the drain valve 49 is closed and the washing / dehydrating tub 46 is stationary during washing and rinsing in each washing process, and the mechanism 48 is used. The torque of the motor 47 is transmitted to the agitator,
By rotating the agitator in the forward and reverse directions, the laundry put in the tub is rotated together with the washing water, and washing is performed by the washing water flowing in the tub. Further, during dehydration, with the drain valve 49 open, the motor 4 is inserted through the mechanism section 48.
The rotational force of 7 is transmitted to the stirring body and the washing / dehydrating tank 46,
Dewatering is performed by rotating the agitator and the washing / dehydrating tank 46 together at high speed.

When the laundry storage / dehydration tub 46 is improperly stored in the washing / dehydration tub 46 when the washing / dehydration tub 46 is rotated, it is elastically suspended by the elastic suspension mechanism 41 when the washing / dehydration tub 46 rotates. The water receiving tank 42 that is swung greatly, and the middle portion of the air outlet pipe 38 also swings as the water receiving tank 42 moves.

However, the middle portion of the air outlet pipe 38 is wound around the suspension rod 39, and the connection port 5 of the air trap 51 is connected.
Since the portion between the other end connected to 2 and the other end is attached to the support rib 54 at a predetermined position, the side wall of the water receiving tank 42 is not hit with the rocking, and a tapping sound is generated. There is no fear. Further, the other end of the air outlet pipe 38 does not come off and come off from the connection port 52 of the air trap 51 due to the swing.

On the other hand, when attaching the air lead-out pipe 38 to the support rib 54, it is sufficient to reduce the diameter of the air lead-out pipe 38 made of an elastic material and insert it into the support hole 55 from the mounting opening 56. On the contrary, it suffices to pull out the air outlet pipe 38 from the mounting opening 56 while reducing the diameter of the air outlet pipe 38. Therefore, the work of attaching the air outlet pipe 38 to the support ribs 54 is simple, the workability is good, and the assembly man-hours do not take time and the number of manufacturing steps can be reduced.

Next, a second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment only in the configuration of the water receiving tank and the attachment form of the intermediate portion of the air outlet pipe.

FIG. 4 is a perspective view of an essential part. In FIG. 4, the water trap tank 57 made of synthetic resin has an air trap 51.
A plurality of supporting ribs 54 are provided on the upper side wall of the so as to project so that the centers of the respective supporting holes 55 are arranged on the same straight line. An intermediate portion of the air outlet pipe 38, one end of which is connected to the pressure detection port of a water level sensor (not shown), is attached to each support rib 54, and the other end of the air outlet pipe 38 is connected to the connection port 52 of the air trap 51. It is connected to the.

With the above-described structure, the middle portion of the air outlet pipe 38 is attached along the side wall of the water receiving tank 57 without slack, and, for example, the dehydration operation can be performed similarly to the first embodiment. Even if the water receiving tank 57 swings greatly and the middle portion of the air outlet pipe 38 swings during the operation, the air outlet pipe 38 is attached to the support rib 54 at a predetermined position on the other end side of the middle portion. Therefore, the side wall of the water receiving tank 57 is not hit and there is no risk of hitting sound. Further, the other end of the air outlet pipe 38 does not come off from the connection port 52 of the air trap 51.

Further, as in the first embodiment, the work of attaching the air outlet pipes 38 to the plurality of support ribs 54 provided is simple, the workability is good, the assembly is not troublesome, and the number of manufacturing steps is reduced. can do.

Next, a third embodiment will be described with reference to FIG. The third embodiment differs from the first embodiment only in the configuration of the water receiving tank and the attachment form of the intermediate portion of the air outlet pipe.

FIG. 5 is a perspective view of a main part. In FIG. 5, the water trap tank 58 made of synthetic resin has an air trap 51.
Two support ribs 54 are horizontally arranged on the upper side wall of each of the support ribs 55, and project in such a manner that the central axes of the support holes 55 are parallel to each other. And these two support ribs 5
4, the air outlet pipe 38, the other end of which is connected to the connection port 52,
The other end of the intermediate portion is attached so as to meander at a predetermined position. Further, the air outlet pipe 38 has a support rib 54.
The intermediate portion on the one end side of the portion attached to is wound around the suspension rod of the elastic suspension mechanism not shown so as not to loosen, and the one end is connected to the pressure detection port of the water level sensor also not shown.

In the structure thus constructed, the middle portion of the air outlet pipe 38 is wrapped around the suspension rod, and the portion between the air outlet pipe 38 and the other end connected to the connection port 52 of the air trap 51 is at a predetermined position. Since the movement is restricted by being attached to the two support ribs 54, there is no possibility of hitting the side wall of the water receiving tank 58 with the rocking to generate noise. Further, the other end of the air outlet pipe 38 does not come off from the connection port 52 due to the swing.

Further, as in the first embodiment, the work of attaching the air outlet pipes 38 to the plurality of support ribs 54 provided is simple, the workability is good, the assembly is not troublesome, and the number of manufacturing steps is reduced. can do.

Next, a fourth embodiment will be described with reference to FIGS. 6 and 7. The fourth embodiment is different from the first embodiment in the configuration of the water receiving tank, particularly in the shape of the support ribs, and is different only in the attachment form of the intermediate portion of the air outlet pipe. FIG. 6 is a perspective view of a main part, and FIG. 7 is an enlarged partial plan view.

In FIGS. 6 and 7, reference numeral 59 denotes a water receiving tank made of synthetic resin, and the air trap 5 of the water receiving tank 59.
A support rib 60, which is a support portion of the air outlet pipe 38, is provided on the upper side wall of the unit 1 by projecting integrally. The air lead-out pipe 38 is detachably and elastically supported by the protruding support rib 60 at a predetermined position on the other end side of the suspension rod 39 winding portion in the middle thereof. That is, the support rib 6
No. 0 has a hole diameter smaller than the outer diameter of the air outlet pipe 38, for example, a support hole 61 having a hole diameter of 7 mm when the outer diameter of the air outlet pipe 38 is 8 mm, and the support hole 61 is on the rib side. A mounting opening 62 that opens in the surface direction of the side wall of the water receiving tank 59 is formed in the portion. The air outlet pipe 38 is attached by being inserted into the support hole 61 from the mounting opening 62.

Further, in the case of such a construction, the air outlet pipe 38 is wound so that the middle portion thereof is wound around the suspension rod 39 so as not to cause slack, and is connected to the other end connected to the connection port 52 of the air trap 51. The supporting ribs 6 are provided at a predetermined position between them.
Since it is attached to No. 0 and its movement is restrained, there is no possibility of hitting the side wall of the water receiving tank 59 with the rocking to generate noise. Further, as the rocking is performed, the air outlet pipe 38 is discharged from the connection port 52.
The other end of will not come off.

On the other hand, as in the first embodiment, the work of attaching the air lead-out pipe 38 to the support ribs 59 is performed by reducing the diameter of the air lead-out pipe 38 made of an elastic material and from the mounting opening 62 to the support hole 6.
It is only necessary to insert it into the inside of 1, and when removing it, on the contrary, it is only necessary to pull out from the mounting opening 61 while reducing the diameter of the air outlet tube 38. Therefore, the work of attaching the air outlet pipe 38 to the support ribs 59 is simple, the workability is good, and the assembly man-hours do not take time and the number of manufacturing steps can be reduced.

Next, a fifth embodiment will be described with reference to FIGS. The fifth embodiment is different from the first embodiment in the configuration of the water receiving tank, particularly in the shape of the support ribs, and is different only in the attachment form of the intermediate portion of the air outlet pipe. 8 is a perspective view of a main part, and FIG. 9 is a partial plan view showing in an enlarged manner.

In FIG. 8 and FIG. 9, 63 is a water receiving tank made of synthetic resin, and the air trap 5 of the water receiving tank 63 is shown.
A support rib 64, which is a support portion of the air outlet tube 38, is provided on the upper side wall of the unit 1 by integrally molding. The air lead-out pipe 38 is elastically supported by the projecting support ribs 64 at a predetermined position on the other end side of the winding rod 39 winding portion in the middle portion thereof. That is, the support rib 64 has a gourd-shaped support hole 68 formed of a large-diameter portion 65, a small-diameter portion 66, and a narrow width portion 67 connecting the large-diameter portion 65 and the small-diameter portion 66. For example, the outer diameter of the air outlet pipe 38 is 8 mm. In this case, the large-diameter portion 65 has a hole diameter of 11 mm, the small-diameter portion 66 has a hole diameter of 7 mm, and the narrow-width portion 67 has a space smaller than the hole diameter of the small-diameter portion 66. Then, the air outlet pipe 38 is attached by inserting the air outlet pipe 38 into the large diameter portion 65 of the support hole 68 and then inserting it into the small diameter portion 66 via the narrow width portion 67.

Further, in the thus constructed structure, the air outlet pipe 38 is wound so that the middle portion thereof is wound around the suspension rod 39 so as not to loosen, and the other end connected to the connection port 52 of the air trap 51 is connected. Since the portion between them is attached to the support ribs 64 to restrain the movement, the water receiving tank 6
There is no risk of hitting the side wall of No. 3 and generating noise. Further, the other end of the air outlet pipe 38 does not come off from the connection port 52 due to the swing.

On the other hand, when attaching the air lead-out pipe 38 to the support rib 64, the other end portion of the air lead-out pipe 38 wound around the suspension rod 39 is inserted into the large diameter portion 65 of the support hole 68 of the support rib 64. After that, the air outlet pipe 38 made of an elastic material can be fixed by simply reducing its diameter and inserting it into the small diameter portion 66 through the narrow width portion 67. In the case of changing the mounting position, on the contrary, It is sufficient to move the lead-out pipe 38 to the large-diameter portion 65 via the narrow-width portion 67 while reducing the diameter. Therefore, the work of attaching the air outlet pipe 38 to the support ribs 64 is simple, the workability is good, and the assembly man-hours do not take time and the number of manufacturing steps can be reduced.

Next, a sixth embodiment will be described with reference to FIG. The sixth embodiment is different from the first embodiment only in the configuration of the water receiving tank and the attachment form of the intermediate portion of the air outlet pipe. FIG. 10 is a view showing a main part, FIG. 10 (a) is a perspective view of the main part, and FIG. 10 (b) is an enlarged partial sectional view.

In FIG. 10, reference numeral 69 denotes a water receiving tank made of synthetic resin. The water receiving tank 69 has a side wall above the air trap 51, which is formed integrally with the water receiving tank 69 so as to extend vertically. Book ridges 70a, 70b, 70a, 70b
As a result, the central groove 71 and the two side grooves 7 parallel to the central groove 71 are formed.
2, 72 are formed. Further, the central groove portion 71 has the side wall portions 73, 73 and has a substantially U-shaped cross-section.
4, the side wall portions 73, 73 are configured to be inserted into and held by the side groove portions 72, 72 so that the opening portions can be closed.

For example, the side wall portions 73, 73 and the side groove portion 72,
72 to the lid member 74 by engaging with each other.
Is formed in the groove opening direction, and a publicly known concave-convex engaging portion (not shown) that can be opened and closed by sliding in the groove extending direction is formed. Then, in the central groove portion 71, one end is supported so that an intermediate portion of the air outlet pipe 38 connected to the pressure detection port of the water level sensor (not shown) is inserted.
The other end of the air outlet pipe 38 is connected to the connection port 52 of the air trap 51.

With this structure, the middle portion of the air outlet pipe 38 is mounted in the central groove portion 71 closed by the lid member 74 along the side wall of the water receiving tank 69 without slack, and Similar to the embodiment described above, even if the water receiving tank 69 swings greatly and the middle portion of the air outlet pipe 38 swings during the dehydration operation, for example, the air outlet pipe 38 has the middle portion in the water receiver tank. The side wall of 69 is not hit, and there is no risk of hitting sound. Further, the other end of the air outlet pipe 38 does not come off from the connection port 52 of the air trap 51.

Further, the air lead-out pipe 38 into the central groove portion 71
Also, in the mounting work of (1), after the middle portion of the air outlet pipe 38 is housed in the central groove portion 71, the side wall portions 73, 7 of the lid member 74
3 so as to engage the side groove portions 72, 72 with the lid member 7
It becomes a simple work of simply sliding 4 in the groove extending direction, the workability is good, and the assembly man-hours do not take much labor, and the number of manufacturing steps can be reduced.

[0043]

As is apparent from the above description, the present invention provides an air outlet pipe connected to the side wall of an elastically suspended water receiving tank and connected to an air trap connection port for detecting the water level in the tank. By constructing the support part that elastically supports the intermediate part in a detachable manner, the air outlet pipe can be easily attached to the water receiving tank without requiring a lot of manufacturing man-hours and at the same time suppressing the generation of tapping noise. It is possible to prevent the air outlet pipe from coming off from the connection port of the air trap.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part according to the first embodiment of the present invention.

FIG. 3 is an enlarged partial plan view of the first embodiment of the present invention.

FIG. 4 is a perspective view of a main part according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a main part according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a main part according to a fourth embodiment of the present invention.

FIG. 7 is an enlarged partial plan view showing a fourth embodiment of the present invention.

FIG. 8 is a perspective view of a main part according to a fifth embodiment of the present invention.

FIG. 9 is an enlarged partial plan view showing a fifth embodiment of the present invention.

FIG. 10 is a view showing a main part of the sixth embodiment of the present invention, and FIG. 10 (a) is a perspective view of the main part.
(B) is an enlarged partial sectional view.

FIG. 11 is a sectional view of a conventional example.

FIG. 12 is a perspective view of a main part in a conventional example.

[Explanation of symbols]

 32 ... Outer box 36 ... Water level sensor 38 ... Air outlet pipe 39 ... Suspension rod 41 ... Elastic suspension mechanism 42, 57, 58, 59, 63, 69 ... Water receiving tank 46 ... Washing / dehydrating tank 51 ... Air trap 52 ... Connection ports 54, 60, 64 ... Support ribs 68 ... Support holes 71 ... Central groove 74 ... Lid member

Claims (4)

[Claims] 1. An air trap is provided in a water receiving tub that accommodates a washing / dehydrating tub and is elastically suspended in an outer box, and the pressure in the air trap is guided to a water level sensor through an air outlet pipe. In a fully automatic washing machine adapted to detect the water level in a water receiving tub, the water receiving tub is provided with a support portion on a side wall for elastically detachably supporting an intermediate portion of the air outlet pipe. Fully automatic washing machine. 2. The fully automatic washing machine according to claim 1, wherein a plurality of supporting parts are provided on the side wall of the water receiving tub. 3. An air trap is provided in a water receiving tub which accommodates a washing / dehydrating tub and is elastically suspended in an outer box, and the pressure in the air trap is led to a water level sensor through an air outlet pipe. In a fully automatic washing machine for detecting the water level in the water receiving tub, the water receiving tub is provided with a support portion having a support hole in the side wall through which the air outlet pipe is inserted and fixed. Fully automatic washing machine. 4. An air trap is provided in a water receiving tub which accommodates a washing / dehydrating tub and is elastically suspended in an outer box, and the pressure in the air trap is led to a water level sensor through an air outlet pipe. In a fully automatic washing machine adapted to detect the water level in a water receiving tub, the water receiving tub has a groove on its side wall for accommodating the intermediate portion of the air outlet pipe, and the groove has an opening at a lid. A fully automatic washing machine characterized by being closed with a member.