KR20120108373A - Laundry machine - Google Patents

Abstract

PURPOSE: A laundry device is provided to reduce a noise and a vibration with a single spring having a complex elastic coefficient when a drum is revolving at high speed. CONSTITUTION: A tub is included in a cabinet(110) to store wash water. A drum(30) is rotatably installed in the tub. Two or more elastic support units(170) supports the tub. Each elastic support unit includes a single spring having two or more separate elastic coefficients. The spring includes two or more sections having different pitches.

Description

Washing machine {Laundry machine}

The present invention relates to a washing machine.

The washing apparatus may include a washing machine, a dryer, and a combined washing machine. Such a washing machine has a rotatable drum therein and performs processing on various laundry by rotating the drum.

However, when the drum rotates, noise and vibration are generated, and the noise and vibration cause discomfort to the user. In addition, if the vibration is transmitted to the floor on which the washing apparatus is installed may cause extreme discomfort to the user.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a washing apparatus capable of reducing noise and vibration and reducing vibration.

Another object of the present invention is to provide a washing apparatus that can reduce noise and vibration, particularly in a dehydration stroke.

An object of the present invention as described above includes a cabinet, a tub provided inside the cabinet for receiving wash water, a drum rotatably provided in the tub, and two or more elastic support portions for supporting the tub, Each elastic support is achieved by a laundry machine, characterized in that it comprises a spring having two or more different modulus of elasticity.

As described above, the washing apparatus according to the present invention can reduce noise and vibration when the drum rotates at high speed, such as dehydration stroke, by having a single spring having a complex elastic modulus.

Further, according to the present invention, when the load is increased by providing a single spring having a complex elastic modulus, for example, in the case of a washing stroke in which the weight of the laundry and the washing water becomes relatively large, the drum and the tub can be prevented from sagging excessively. Can be.

1 is a perspective view showing another washing apparatus in one embodiment,
Figure 2 is a side sectional view of the washing apparatus of Figure 1,
3 is a side view of a spring having a single modulus of elasticity,
4 is a side view of a single spring having a composite modulus of elasticity,
5 is a graph showing the relationship between the external force and the displacement of the spring,
6 is a side cross-sectional view of an elastic support having a single spring having a composite modulus of elasticity;
7 is an exploded perspective view illustrating a washing apparatus according to another embodiment;
8 is a graph showing the load and the drum inclination angle in the washing apparatus according to FIG.

Hereinafter, a laundry machine according to various embodiments of the present disclosure will be described with reference to the accompanying drawings.

1 is a perspective view showing a washing apparatus according to an embodiment of the present invention, Figure 2 is a side cross-sectional view of FIG.

1 and 2, the washing apparatus 10 according to an embodiment may include a cabinet 110 that first forms an appearance. Cabinet 110 forms the appearance of the washing machine may be provided with various components described below.

The control panel 120 may be provided at a predetermined position of the cabinet 110, for example, the front part. The control panel 120 may include a course selector 140 through which a user can select a course, a display unit 130 displaying various types of information about a washing machine, and the like.

In addition, an opening 112a may be formed in the front portion of the cabinet 110 and may include a door 115 that opens and closes the opening 112a. Therefore, the user can open the door 115 to inject the object therein.

The inside of the cabinet 110 may be provided with a tub 20 to accommodate the wash water. The tub 20 may be provided inside the cabinet 110 to accommodate the wash water when the washing apparatus is driven.

On the other hand, the drum 30 is provided to be rotatable in the forward and reverse direction inside the tub 20, the lifter 31 for raising the laundry to the predetermined position on the inner peripheral surface of the drum 30 is a predetermined position A plurality of through holes 32 are formed to allow the washing water to escape from the drum 30 in a washing stroke such as dewatering. As a result, the drum 30 may provide an accommodation space for accommodating the laundry object and may be rotatably provided by a driving unit such as a motor.

The driving unit 60 mounted to the rear of the tub 20 is coupled to the drum 30 through the rotation shaft 65 to rotate the drum 30. Recently, a drive unit such as a motor is provided on the rear wall of the tub 20, and a direct drive method for rotating the drum 30 has been adopted. Since the connection method of such a motor is already widely known, a detailed description thereof will be omitted.

In addition, a water supply hose 40 and a water supply valve 41 installed on the water supply hose 40 to supply water from the external water source to the tub 20 in the upper side of the tub 20 are controlled. And, a detergent supply device 42 is installed so that the detergent is supplied so that the water supplied through the water supply hose 40 is introduced into the tub 20 together with the detergent. In addition, a drain hose 50, a drain pump 51, and the like are installed below the tub 20 to discharge the wash water used for washing and rinsing to the outside. Further, the lower side of the tub 20, the heater 25 for adjusting the water temperature of the wash water, a temperature sensor (not shown) for measuring the water temperature of the wash water, and the electrode sensor 22 for sensing the conductivity of the wash water It may be provided.

The tub 20 and the drum 30 may have a structure inclined toward the rear side, although not shown in the drawing. That is, the rear side of the tub 20 and the drum 30 has a structure inclined further downward. This is to soak the laundry at a faster time by supplying the wash water from the rear when the wash water is supplied. In addition, when the drum 30 rotates, the laundry is usually driven toward the front of the drum 30, and thus serves to prevent the laundry from being driven forward.

Meanwhile, the tub 20 is supported by the upper elastic support 170 and the lower damper 180. When the drum 30 provided inside the tub 20 rotates, vibration due to the rotation of the drum 30 may occur. Therefore, the tub 20 and the drum 30 may be supported while cushioning the vibration by the upper elastic support 170 and the lower damper 180.

In addition, the washing apparatus 10 may include a controller (not shown) for controlling the drum 30 and various components. The control unit rotates the drum according to the course selected by the user, and controls various components including movable valves and motors.

By the way, in recent years, efforts to reduce noise and vibration while driving the washing machine have been continued. Since the washing apparatus performs washing, rinsing, or dehydration while the drum 30 rotates, it is important to reduce noise and vibration caused by the rotation of the drum 30. In particular, in the dehydration stroke, the drum 30 rotates at a relatively higher speed than other strokes, so it is very important to reduce vibration and noise in the dehydration stroke. In addition, it is important to prevent the vibration of the drum 30 from being transmitted to the floor on which the washing apparatus 10 is installed through the tub 20 and the cabinet 110. This is even more so in recent years because the tendency to install the washing apparatus 10 indoors rather than outdoors increases. However, in order to prevent such vibration transmission, the smaller the elastic modulus of the elastic support unit 170 described above, the more advantageous. In other words, if the elastic modulus of the spring constituting the elastic support 170 is made smaller, the elastic modulus may be more flexible, thereby absorbing and attenuating more vibration generated by the rotation of the drum 30. In addition, when the elastic modulus of the elastic support unit 170 is reduced, vibration of the drum 30 may be prevented from being transmitted to the cabinet 110 through the elastic support unit 170.

By the way, by reducing the elastic modulus of the elastic support 170, the vibration can be reduced, but the front of the tub 20 and the drum 30 can not be prevented from excessively sagging down. In other words, in recent years, the washing apparatus is increasing in size to accommodate more laundry. Therefore, the amount of laundry contained in the drum 30 also increases, and when the washing water is supplied in the washing stroke, the weight of the laundry and the washing water become larger than in the related art. Therefore, when the elastic modulus of the elastic support unit 170 is reduced in order to reduce vibration, the tub 20 and the drum 30 are excessively sag due to the weight of the laundry and the wash water when a lot of laundry is put into the drum 30. Can be. In particular, the front of the tub 20 and the drum 30 in the structure as shown in Figure 2 may be excessively sag toward the bottom. Therefore, hereinafter, the configuration will be described with reference to the drawings to reduce the vibration and to prevent the drum and the tub from sagging excessively.

Figure 3 is a perspective view showing a spring 160 of the elastic support utilized in the conventional washing machine.

Referring to FIG. 3, the spring 160 is configured to have a predetermined length and have the same pitch. Therefore, the spring 160 has only one elastic modulus and thus cannot solve the above-described problem. In other words, if the elastic modulus is lowered to reduce vibration, the drum and the tub can not be prevented from sagging excessively when the quantity is increased. If the elastic modulus is increased, the drum and the tub can be prevented from sagging but the vibration cannot be reduced. will be.

4 is a view showing an elastic support 170 provided in the washing apparatus according to an embodiment of the present invention. In particular, FIG. 4 illustrates only the spring 1160 in the elastic support 170.

Referring to FIG. 4, the spring 1160 according to an embodiment may be configured to have two or more elastic moduli different from each other. That is, the spring 1160 according to the present embodiment may not have one elastic modulus (single elastic modulus) but may have two or more different elastic moduli in one spring structure. Therefore, it can be defined as a single spring having a composite modulus of elasticity.

In detail, the spring 1160 may include two or more sections having different pitches from each other. For example, a first section 1162 having a first pitch and a second section 1164 having a second pitch may be provided. Since the pitches of the first section 1162 and the second section 1164 are different from each other, the first elastic modulus of the first section 1162 and the second elastic modulus of the second section 1164 are different from each other. Here, the first pitch may be provided to be larger than the second pitch. Thus, the first elastic modulus due to the first pitch becomes smaller than the second elastic modulus due to the second pitch. The spring 1160 having such a configuration will change the elastic modulus to operate according to the change of the surrounding environment. That is, the elastic modulus that operates when the external force acting on the spring 1160 increases by more than a predetermined size or the displacement occurs by a predetermined size or more may change.

5 is a graph showing changes in displacement and external force in a spring having a single modulus of elasticity and a single spring having a composite modulus of elasticity. In Figure 5, the horizontal axis shows the displacement, the vertical axis shows the external force, the slope of each straight line corresponds to the elastic modulus. In FIG. 5, a spring having a single modulus of elasticity changes along the A curve, and a single spring having a complex modulus of elasticity changes along the B curve.

Referring to FIG. 5, a spring having a single elastic modulus changes along one straight line. However, a single spring having a composite modulus of elasticity may change along two straight lines B1 and B2 having one inflection point C as shown in the figure. Here, two straight lines are shown by performing experiments with springs having two different modulus of elasticity, and the number of straight lines may vary according to the number of modulus of elasticity having different values.

As shown in FIG. 5, when a single spring having a complex elastic modulus has a relatively small external force, the single spring changes along a straight line B1 having a first elastic modulus having a smaller elastic modulus, and the external force is past the inflection point C. When the elastic modulus becomes larger, the elastic modulus is changed along a straight line B2 having a larger second elastic modulus than the first elastic modulus. As a result, it can be said that the external force or displacement of the inflection point is one reference value that determines the change of the elastic modulus.

Specifically, when an external force below the inflection point C is applied, that is, when a relatively smaller external force is applied, the slope of the B1 straight line becomes smaller than that of the A straight line. This means that the elastic modulus of B1 becomes smaller. Therefore, when an external force below the inflection point is applied, it can be seen that more displacement occurs in a spring having a complex modulus than a spring having a single modulus. However, when an external force above the inflection point is applied, the slope of the B2 straight line becomes larger than that of the A straight line. Therefore, the elastic modulus of the B2 straight line becomes larger. As a result, when an external force above the inflection point is applied, it can be seen that the displacement is smaller in the spring having a complex elastic modulus than the spring having a single elastic modulus.

However, the external force is described in connection with the washing machine as follows. That is, when a large amount of laundry and wash water are accommodated in the drum as in the washing stroke, the external force acting on the spring supporting the tub becomes large. Thus, a single spring having a composite modulus of elasticity can be driven along a straight line B2 having a second modulus of elasticity having a relatively larger value. In this case, since the displacement is suppressed by the second elastic modulus having a relatively larger value, the tub and the drum may be prevented from sagging excessively even if the weight of the laundry and the washing water inside the drum increases. In addition, since the drum rotates at a relatively low speed in the case of a washing stroke in which the weight of laundry and washing water inside the drum increases, the generation of vibration and noise may not be a problem even if the elastic modulus of the spring increases.

In addition, when there is almost no washing water, such as a dehydration stroke and only the wet laundry, compared to the washing stroke relatively less weight inside the drum, which means that the external force acting on the spring is smaller. Thus, a single spring having a composite modulus of elasticity can drive along a straight line B1 having a first modulus of elasticity having a relatively smaller value. As a result, even if the drum rotates at a relatively high speed in the dehydration stroke, the vibration may be attenuated by the first elastic modulus having a smaller value and the vibration transmission may be prevented. On the other hand, when the spring is driven along the straight line B2, even if the external force is small, the displacement becomes large, but in this case, the absolute value of the displacement caused by the small weight inside the drum is not large.

As a result, when a single spring having a complex elastic modulus is provided, excessive deflection of the drum and the tub can be prevented when the amount of the laundry and the washing water is large, such as a washing stroke. Furthermore, when the drum rotates at a relatively high speed over a predetermined speed or when the drum rotates according to a target RPM (steady state RPM) in a dehydration stroke, vibration attenuation and vibration transmission can be suppressed. Here, the inflection point C can be appropriately set in a single spring having a composite modulus of elasticity. That is, when the load (the weight of laundry or laundry and washing water) is relatively large (for example, the washing stroke) in consideration of the capacity of the washing apparatus, the driving force is driven in a region having a larger elastic modulus, and the load is relatively small. (E.g., dewatering stroke) is preferably set to drive in a region having a smaller elastic modulus.

6 is a side cross-sectional view illustrating an elastic support part 2000 having a spring having the above-described composite modulus of elasticity. The elastic support 2000 may be provided on the tub 20. It will be described in detail below.

Referring to FIG. 6, the elastic support part 2000 includes a predetermined second section 1164 in which the spring 1160 is accommodated, and is connected to the tub 20 to selectively pressurize the spring 1160. And a support bar 2200 that selectively pressurizes the spring 1160 and is connected to the cabinet 110.

One end of the housing 2100 may be connected to the tub 20, and may include a single spring 1160 having a complex elastic modulus in the second section 1164 therein.

In addition, one end of the support bar 2200 may be connected to an upper portion of the cabinet 110, and the other end thereof may extend into the second section 1164 through the other end of the housing 2100. The other end of the support bar 2200 may be provided with a compression unit 2210 capable of compressing the spring 1160. Therefore, when the tub 20 is displaced up and down due to the vibration of the drum 30, the compression unit 2210 of the support bar 2200 moves up and down a predetermined distance to selectively press the spring 1160. do. Since the effect of a single spring having a composite modulus of elasticity has already been described above with reference to FIG. 5, repeated description thereof will be omitted.

Meanwhile, the elastic support part 2000 may further include a damper part 2220. The damper part 2220 may be provided to surround the compression part 2210. That is, the damper portion 2220 may be provided between the compression portion 2210 and the inner surface of the housing 2100. The type of damper portion 2220 is not limited, and may be, for example, a friction damper. As a result, the elastic support according to the present embodiment may be referred to as a configuration including both the spring and the damper by one configuration. Therefore, in the case of providing the elastic support according to the present embodiment, a separate damper part provided in the lower part of the tub in the conventional washing machine may not be necessary anymore.

7 is a partially exploded perspective view of a washing apparatus according to another embodiment. Referring to FIG. 7, the tub may include a tub front 100 constituting the front part and a tubair 120 constituting the rear part.

The tub front 100 and the tubular 120 may be assembled by screws, and form a space in which the drum is accommodated. The tubular 120 has an opening at a rear side thereof, and a rear gasket 250 may be connected to an inner circumference of the opening. In addition, the rear gasket 250 may be connected to the tub bag 130, and the tub bag 130 may include a through hole through which a rotating shaft penetrates.

The rear gasket 250 is connected to the tub back 130 and the tubular 120 so as to be respectively sealed to prevent the wash water from leaking in the tub. The tubback 130 vibrates with the drum when the drum is rotated, and may be spaced apart from the tubular 120 at a sufficient interval so as not to interfere with the tubular 120. In addition, the rear gasket 250 may be made of a flexible material so that the tub back 130 may allow relative movement without interfering with the tubular 120. In addition, the rear gasket 250 may have a pleat that may extend to a sufficient length to allow relative movement of the tubback 130.

In the present embodiment, the rear gasket 250 is connected to the tubback 130, but is not limited thereto. The rear gasket 250 may seal between the tub and the driving unit (not shown) including the rotating shaft 351, the bearing housing 400, and the like, and allow the driving unit to move relative to the tub. Therefore, the rear gasket 250 may not be limited to the shape or the object to be connected if it can achieve such a function.

On the other hand, the front portion of the tub front 100 may be provided with a flexible member 200 which will be described later in detail as a front gasket.

The drum may include a drum front 300, a drum center 320, a drum bag 340, and the like. In addition, ball balancers 310 and 330 may be installed at the front and rear portions of the drum, respectively. The drum bag 340 may be connected to the spider 350, and the spider 350 may be connected to the rotation shaft 351. The drum is rotated in the tub by the rotational force transmitted through the rotating shaft 351.

The rotating shaft 351 may be connected to the motor (not shown) through the tub back 130. In this embodiment, the motor may be connected concentrically with the rotation shaft 351. That is, in this embodiment, the motor may be directly connected to the rotation shaft 351. Specifically, the rotor and the rotation shaft 351 of the motor may be directly connected. Of course, the motor and the rotating shaft 351 may be connected indirectly, not directly, for example, by a belt or the like.

The bearing housing 400 may be coupled to the rear surface 128 of the tub back 130. In addition, the bearing housing 400 serves to rotatably support the rotating shaft 351 between the motor and the tub back 130.

A stator (not shown) is fixedly installed in the bearing housing 400. The rotor may be positioned to surround the stator. As described above, the rotor may be directly connected to the rotation shaft 351. The motor may be configured as an outer rotor type motor and may be directly connected to the rotating shaft 351.

The bearing housing 400 may be supported from the cabinet base 600 through the suspension unit. The suspension unit may include a vertical support and an inclined support that is inclined with respect to the front and rear directions. For example, in the present embodiment, the suspension unit may include three vertical supports 500, 510, and 520 and two inclined supports 450 and 530 that support the inclination in the front-rear direction. On the other hand, the suspension unit may be connected to the cabinet base 600 to allow a certain degree of elastic deformation to allow movement of the drum back and forth and / or left and right without being fully fixed. That is, the suspension unit may be elastically supported to allow rotation to some extent in the front and rear and left and right with respect to the support point connected to the base. The vertically installed suspension for such elastic support may be installed in the base 600 via a rubber bushing.

The vertical installation of the suspension can be configured to elastically dampen the vibration of the drum and the tilted installation can be configured to damp the vibration. That is, in the vibration system including the spring (elastic support) and the damping means, the vertical installation may serve as a spring and the tilted installation may serve as a damping means.

The tub is supported by the cabinet, the vibration of the drum may be buffered by the suspension unit. Therefore, the washing apparatus according to the present embodiment may be substantially a form in which the support structure of the tub and the drum is separated, and the vibration of the drum is not directly transmitted to the tub.

On the other hand, since the washing apparatus having the configuration as shown in FIG. 7 is provided with a spring at the bottom of the tub 20, the elastic support having a single spring having the above-described complex elastic modulus may be provided at the bottom of the tub 20. . However, since the washing apparatus described above includes a motor at the rear of the tub 20 and the suspension unit is connected to the rear of the tub 20, the weight of the rear of the tub may be increased as compared with the related art. Accordingly, a single spring having a compound elastic modulus may be provided at two vertical supports 510 and 520 located in front of the three vertical supports 500, 510 and 520 except for the rear. This is because when a single spring having a composite modulus of elasticity is provided in the vertical support part 500 at the rear of the tub, a large amount of displacement occurs due to the increased weight of the rear part of the tub even when the amount is small.

On the other hand, in the laundry apparatus according to FIG. 7 described above, as described above, the rear weight of the tub is increased to move the center of gravity toward the rear of the tub. Therefore, when a very small amount of laundry is put into the drum, an external force may hardly act on the springs provided on the vertical supports 510 and 520 located at the front side. In this case, the width of the change in length of the elastic support for pressing the spring may be greater than the maximum length of the single elastic modulus spring (that is, the free field length where no external force is applied). That is, when the front of the drum deflects downward, the front elastic support part may press the spring. When a very small amount of laundry is put into the drum, the elastic support part may be difficult to press the spring. Therefore, when vibration is generated by the rotation of the drum, noise may be generated by contact of the spring with the elastic support.

Since a single spring having a complex modulus includes zones with different pitches, the length of the single spring may be longer than that of the single modulus spring used in a conventional washing machine. Therefore, the maximum length of the spring is increased so that the elastic support portion and the spring are continuously in contact with each other even when a small amount of water is generated, thereby reducing noise.

On the other hand, since the driving and the effect of the single spring having such a complex elastic modulus has been described above in the description of FIG.

However, the washing apparatus according to FIG. 7 may be referred to as a structure in which a tub is supported by a cabinet and a drum is separated from the tub by a suspension unit behind the tub. Therefore, when the laundry and the wash water is introduced into the drum, the front of the drum may sag downward. If the front of the drum excessively sags downward, it may come into contact with the tub and generate noise and vibration. Therefore, even with a single spring having a complex modulus of elasticity, it should be properly configured so that the front deflection of the drum is not greater than that of a spring having a single modulus of elasticity.

8 is a graph showing the inclination angle of the drum and tub according to the load (the weight of laundry or laundry and washing water) in a spring having a single modulus and a so-called complex elastic modulus in the washing apparatus according to FIG. to be. In Figure 8, the horizontal axis shows the load, the vertical axis shows the inclination angle.

Referring to FIG. 8, when a spring having a single elastic modulus is provided, the inclination angle of the drum front along the α curve continues to decrease with a predetermined slope as the load increases. In the washing apparatus according to FIG. 7, the drum is inclined downwardly (that is, the front of the drum is inclined upward), and thus the inclination angle is gradually decreased when the drum is accommodated in the drum and the front of the drum sags. For losing.

On the other hand, when a single spring having a complex elastic modulus is provided, when a load below the inflection point δ is applied, the change of the inclination angle is relatively large by driving the first elastic modulus (β1 curve), and the inflection point δ When the above load is applied, it is driven by the second elastic modulus larger than the first elastic modulus to maintain a constant inclination angle without changing the inclination angle (β2 curve).

As a result, when a load below the inflection point is applied, the front of the drum sags downwards, and the elastic support and the spring continue to contact each other, thereby reducing noise. It can prevent the contact between the drum and the tub.

10 washing machine 20 tub
30.Drum 110 ... Cabinet
120 ... Control panel 1160 ... Single spring with compound modulus

Claims (19)

cabinet;
A tub provided inside the cabinet to accommodate washing water;
A drum rotatably provided inside the tub;
And at least two elastic supports for supporting the tub,
Washing apparatus, characterized in that each elastic support comprises a spring having two or more different modulus of elasticity. The method of claim 1,
The spring comprises a washing apparatus comprising at least two sections having different pitches. The method of claim 1,
The spring is laundry machine, characterized in that the elastic modulus changes when an external force of a predetermined size or more is applied. The method of claim 1,
Washing apparatus, characterized in that the elastic modulus changes when a displacement of more than a predetermined size occurs in the spring. The method of claim 1,
And the spring has a first elastic modulus and a second elastic modulus greater than the first elastic modulus. The method of claim 5,
The spring operates according to the first elastic modulus when the weight of the laundry inside the tub or the sum of the weights of the laundry and the washing water is equal to or less than the reference value, and when the sum of the weights is equal to or greater than the reference value, the spring is applied to the second elastic modulus. Washing apparatus, characterized in that operating according to. The method of claim 5,
And the spring operates according to the first elastic modulus when the drum rotates at a predetermined speed or more. The method of claim 5,
And the spring operates according to the first elastic modulus when the drum rotates according to the target RPM of the dehydrating stroke. The method of claim 1,
Washing device, characterized in that the elastic support is provided on the top of the tub. 10. The method of claim 9,
The elastic support portion
A housing having a predetermined accommodation space in which the spring is accommodated and connected to the tub to selectively press the spring; And
And a support bar selectively pressing the spring and connected to the cabinet. The method of claim 10,
One end of the housing is connected to the tub,
The support bar has a laundry bar, one end of which is connected to the cabinet, the other end of which includes a support bar having a compression unit for compressing the spring extending into the accommodation space through the other end of the housing; . The method of claim 11,
Washing apparatus, characterized in that the elastic support further comprises a damper. The method of claim 12,
The damper unit comprises a friction damper provided between the compression unit and the inner surface of the housing. The method of claim 12,
Washing apparatus, characterized in that the bottom of the tub is not provided with a separate damper. The method of claim 1,
Washing apparatus, characterized in that the elastic support is provided in the lower portion of the tub. 16. The method of claim 15,
The washing apparatus is characterized in that the tub and the drum support structure is separated. 16. The method of claim 15,
Washing apparatus, characterized in that the vibration of the drum is not transmitted directly to the tub. 16. The method of claim 15,
Washing device, characterized in that the elastic support is provided in the lower front side of the tub. 16. The method of claim 15,
Washing apparatus, characterized in that the length of the spring is larger than the width of the change in the length of the elastic support according to the weight of the laundry or laundry and wash water.

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