KR20120108473A - Washing machine - Google Patents

Abstract

PURPOSE: A laundry machine is provided to improve user satisfaction by reducing a noise and a vibration generated by the operation of a drain pump. CONSTITUTION: A cabinet includes a base(220) and a front panel. A drain pump assembly(200) includes the followings. A drain pump is connected with a side of a pump case. A filter is installed in the pump case. The filter selectively communicates with the outside of the cabinet through the front panel. The front of the drain pump assembly is directly and elastically supported in the base. The rear of the drain pump assembly is elastically supported.

Description

Washing machine

The present invention relates to a washing machine, and more particularly to a washing machine having a drain pump for draining water to the outside.

The washing machine includes a washing machine that performs washing using washing water, or a dryer for drying wet clothes. Such a washing machine includes a cabinet forming an external shape of a device, and the cabinet includes a laundry accommodating part in which laundry is accommodated and washed or dried. In general, the laundry receiving portion may be formed in a cylindrical shape and may be referred to as a drum for convenience.

The washing machine may include a drain pump for discharging water from the inside of the cabinet to the outside. In the case of a washing machine, the drain pump is driven to drain the wash water used for washing to the outside. Therefore, in consideration of space efficiency and potential energy, the drain pump is generally provided at the bottom of the cabinet.

Operation of the drain pump inevitably causes noise or vibration. In particular, the vibration is not limited to the vibration of the drain pump itself, but may be transmitted to the cabinet to cause vibration of the cabinet, thereby further amplifying the noise.

Hereinafter, for convenience of description, a drum washing machine will be described with reference to vibration and noise problems.

First, a configuration of a general drum washing machine will be described with reference to FIG. 1.

The washing machine includes a cabinet (110) forming an exterior, a tub (120) provided inside the cabinet and supported by the cabinet, a drum (130) rotatably provided in the tub, and into which laundry is inserted. The motor 140 rotates the drum by applying torque to the drum, and the control panel 115 enables the user to select and execute a washing course.

The cabinet 110 includes a main body 111, a front panel 112 provided at the front of the main body and coupled to each other, and a top plate 116 coupled to the upper part of the main body. The front panel 112 may include an opening 114 provided to allow access to and from the laundry, and a door 113 to selectively open and close the opening.

The base 20 is provided at the bottom of the washing machine to support the configuration of the washing machine.

The drum 130 forms a space for washing laundry put into the drum 130. The drum 130 is rotated by receiving power from the motor 140. Since the drum 130 includes a plurality of through holes 131, the wash water stored in the tub 120 may be introduced into the drum 130 through the through holes 131, and the washing inside the drum may be performed. Water can flow out of the tub. Therefore, when the drum is rotated, the laundry put into the drum is removed from the dirt during the friction with the wash water stored in the tub. Then, the laundry is lifted up and down as the drum rotates through the lifter 135 inside the drum 130 and is washed while falling.

The control panel 115 is not only a user can input the information related to the washing, but also configured to check the information related to the washing. That is, the configuration for the interface with the user.

Accordingly, the control panel 115 includes manipulation units 117 and 118 through which a user can input a control command, and a display unit 119 displaying control information according to the control command. And the control panel may include a control unit for controlling the driving of the washing machine including the operation of the motor in accordance with the control command.

On the other hand, the base 20 is provided with a drain pump (10). The drain pump discharges the washing water in the tub to the outside of the washing machine. And, a filter is provided inside the drain pump, the filter is configured to be accessible from the outside of the washing machine. An auxiliary panel 30 is provided in the base, and a through hole 31 is formed in the auxiliary panel. In addition, a lead 103 is formed on the front panel 112. Opening the lid makes it possible to access the filter of the drain pump from the outside through the through hole (31).

Referring to Figure 2 will be described in detail with respect to the conventional drain pump support structure.

Figure 2 is an exploded perspective view of a conventional drain pump and its supporting means.

The drain pump may be referred to as an assembly in which various configurations are combined. Therefore, drain pump means a drain pump assembly.

The drain pump assembly 10 may include a pump case 11, a drain pump 16, and a filter 15. In addition, the pump case 11 has a washing water inlet 12 formed at a rear thereof, and the washing water flows into the pump case 11 through the pump case 11. The drain port 13 is formed above the pump case 11. Therefore, the introduced washing water is drained out of the washing machine through the drain 13. At this time, the drain pump 16 generates pressure to discharge the wash water and is provided at one side of the pump case 11.

In addition, a filter 15 is provided at the front of the pump case 11, and a user may access the filter 15 to clean the inside of the pump case.

If necessary, the drain pump assembly may include a circulation pump 17 and a circulation port 14 for discharging the introduced washing water to a drum or a tub.

As shown, in a conventional washer the drain pump assembly was supported directly to the base 20 via a pump mount 40. That is, the pump mount 40 is provided at both front sides of the drain pump case, and one pump mount 40 is provided at the rear. In addition, the base 20 has a seating groove 22 in which the pump mount 40 is seated. This support structure may be referred to as "A" structure for convenience. This structure may be referred to as a structure in which vibration of the pump is directly transmitted to the pump mount.

In addition, unlike the above-described separate bracket (30) to support the bottom of the drain pump case, there is also a structure in which the pump mount 40 supports the bracket (30). Such a structure may be referred to as a structure in which the vibration of the pump is directly transmitted to the bracket 30 and then transferred to the pump mount 40.

On the other hand, the filter 15 is connected to the opening 31 of the auxiliary panel 30, the auxiliary panel 30 is located in front of the base 20. At this time, the protrusion 21 of the base is inserted into the slot 33 of the auxiliary panel 30 so that both are coupled and the front panel is coupled to the auxiliary panel although not shown through the protrusion 32 of the auxiliary panel 32. Can be.

The drain pump assembly 10 is a device configured to suck and discharge water. Therefore, it inevitably causes vibration and noise during operation. Accordingly, the vibration of the drain pump assembly causes the cabinet structure, for example, the front panel 112, the side panel, the auxiliary panel 30, and the base 20, to be excited, thereby resulting in structure-born noise. Is generated. Here, the front panel 112, the auxiliary panel 30 or the side panels may be formed in a thin plate form, there is a problem that the noise can be further amplified by vibration.

In the above-mentioned A structure or B structure, there is a problem that a satisfactory noise reduction effect does not occur. Therefore, there is an urgent need for a structure that can effectively reduce vibration and noise generated by the operation of the drain pump assembly.

According to an embodiment of the present invention, it is an object of the present invention to provide a washing machine that can reduce the noise and vibration generated by the operation of the drain pump to increase the user's satisfaction.

According to an embodiment of the present invention, an object of the present invention is to provide a washing machine that can effectively reduce the noise and vibration generated due to the structure of the washing machine cabinet and the like.

In order to solve the above problems, an embodiment of the present invention, a washing machine comprising a cabinet having a base and a front panel, a drain pump assembly and support means for supporting the drain pump assembly to have a different support structure on the base To provide.

For example, when there are a plurality of support points for supporting the drain pump assembly, some may include support means for directly supporting the drain pump assembly to the base and some to the base through the bracket.

The support means may have a different support structure according to the front and rear with respect to the center of gravity of the pump assembly. One support structure is a structure for elastically supporting the pump assembly directly to the base, and the other support structure may be a structure for elastically supporting the base through the bracket.

Specifically, the front of the pump assembly may be elastically supported directly on the base, and the rear of the pump assembly may be elastically supported on the base through a bracket.

On the other hand, the support means is preferably configured such that one support point is formed in front of the center of gravity of the pump assembly. Alternatively, a plurality of support points may be formed at the rear of the pump assembly based on the center of gravity of the pump assembly. Preferably, support points may be formed at both rear sides. Therefore, it is preferable that the number of support points in the front of the pump assembly based on the center of gravity is smaller than the number of support points in the rear.

Preferably, the moment distance between the center of gravity and the front support point is shorter than the moment distance between the center of gravity and the rear support point.

The drain pump assembly may include a pump case, a drain pump connected to one side of the pump case, and a filter provided inside the pump case and selectively communicating with the outside of the cabinet through the front panel. have.

The support means may comprise a pump mount that elastically supports the front of the pump assembly directly to the base. The pump mount is formed of an elastic material to directly absorb and mitigate vibration of the pump assembly.

The support means may comprise a pump bracket provided to support the rear of the pump assembly. The pump bracket may be coupled to the bottom of the pump housing or fixed to the bottom of the pump housing. Thus, the vibration of the pump housing is transmitted directly to the pump bracket. Accordingly, the support means may include an auxiliary pump mount connected to the pump bracket to elastically support the rear of the pump assembly to the base.

Thus, the support means may be said to include a pump mount for directly elastically supporting the front of the pump assembly and an auxiliary pump mount for indirectly elastically supporting the rear through the bracket.

The base may have a support hole through which a part of the pump mount is fixed. The support hole may be formed on a surface bent at a predetermined height from the lowest bottom surface of the base. Thus, the vibration transmitted to the pump mount can be sufficiently transmitted to the base. In addition, in some cases, the vibration transmitted to the pump mount may be transmitted to the ground, that is, the bottom surface on which the washing machine is placed. As mentioned above, the base supports many configurations of the washing machine. Therefore, it is a configuration that receives a lot of load. And the rigidity is made very high. Thus, vibrations transmitted to the pump mount can be prevented from being transmitted to the cabinet structure. In addition, in some cases, the vibration may be transmitted to the bottom surface, thereby preventing the vibration from being transmitted to the cabinet structure.

The pump mount may include a support positioned on the support hole to directly support the pump assembly.

The pump mount may include a fixing part fixed to the support hole. The pump mount may include a bottom portion positioned below the support hole to support the pump mount from the optimum bottom surface of the base.

The support part may include a groove part formed to insert a lower part of the pump assembly and an eccentric prevention part formed to prevent an eccentric movement of the pump assembly at both sides of the groove part.

The eccentric prevention portion may be formed with a plurality of through holes penetrating from the front to the rear.

One side of the pump case may be provided with a drain pump and the other side may be provided with a circulation pump. Therefore, the drain pump and the circulation pump may be provided symmetrically on both sides with respect to the center of the pump case.

According to an embodiment of the present invention, it is possible to provide a washing machine that can reduce the noise and vibration generated by the operation of the drain pump to improve user satisfaction.

According to an embodiment of the present invention, in particular, it is possible to provide a washing machine that can effectively reduce noise and vibration generated due to the structure of a washing machine cabinet or the like.

Therefore, it is possible to provide a washing machine that is convenient in use and reliable.

1 is a schematic diagram schematically showing a configuration of a conventional washing machine;
Figure 2 is a partially exploded perspective view showing a support structure of a conventional drain pump assembly;
3 is a partial perspective view showing one embodiment according to the present invention;
4 is a plan view of the bracket of FIG. 3;
FIG. 5 is a front view illustrating a support structure of the pump mount and the drain pump assembly of FIG. 3; FIG.
FIG. 6 is a perspective view of the pump mount of FIG. 5; FIG.
FIG. 7 is a side view of the support structure of the drain pump assembly of FIG. 3; FIG.
8 is a plan view of the support structure of the drain pump assembly of FIG. And
9 is a graph showing the effect of one embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

Unless defined otherwise, all terms herein are the same as the general meaning of the term as understood by one of ordinary skill in the art to which this invention belongs, and if the terms used herein conflict with the general meaning of the term Are as defined herein.

On the other hand, the configuration or control method of the device to be described below is not intended to limit the scope of the present invention, but to describe the embodiment of the present invention, the same reference numerals are used throughout the specification the same components Indicates.

In addition, parts not specifically described in the embodiments of the present invention may be described as the conventional washing machine and the drain pump assembly shown in FIGS. 1 and 2 unless they contradict each other. Therefore, detailed description of the overlapping configuration is omitted.

First, an embodiment of the present invention will be described in detail with reference to FIG. 3.

In order to solve the above problems, an embodiment of the present invention, a washing machine comprising a cabinet having a base and a front panel, a drain pump assembly and support means for supporting the drain pump assembly to have a different support structure on the base To provide. As described above, detailed descriptions of the base, the cabinet, and the drain pump assembly will be omitted.

In the above-described conventional A structure and B structure, two support points are formed at the front of the pump assembly and one support point at the rear. That is, more support points are formed adjacent the front panel or auxiliary panel 235. Therefore, the vibration transfer force caused by the vibration of the pump assembly is more forward, there is a great possibility of easy vibration transmission to the front panel or the auxiliary panel. In addition, both the support point shape and the support structure formed at the front or rear of the pump assembly are the same. Therefore, there is a problem that can not effectively absorb the vibration according to the magnitude or direction of the excitation force and can not block the transmission of vibration.

Therefore, the support structure of the drain pump assembly according to the present embodiment may have a different support structure depending on the front and the rear of the pump assembly. In addition, the front support point may be configured to be smaller than the rear support point.

For example, when there are a plurality of support points for supporting the drain pump assembly, some may include support means for directly supporting the drain pump assembly to the base and some to the base through the bracket.

In the present exemplary embodiment, the auxiliary panel 235 may include a through hole 236 formed in the auxiliary panel. The through hole 236 allows the user to clean the filter 215.

3 shows a pump mount 250 for supporting the front of the drain pump assembly. The pump mount 250 forms substantially one support point. Thus, the pump mount 250 is preferably coincident with the center of gravity line, but positioned to support the center of gravity front.

The pump mount 250 may be formed of a rubber material having elasticity. Accordingly, the pump assembly may be directly elastically supported with respect to the base 220.

Also shown in FIG. 3 is a bracket 230 and auxiliary pump mount 240. The bracket 230 is configured to support the back of the pump assembly 200, in particular of the pump housing 211 of the pump assembly. That is, it is provided below the pump housing 211 and connected to or fixed to the pump housing. Thus, vibration of the pump assembly 200 is transmitted directly to the bracket 230.

The bracket 230 is coupled to the auxiliary pump mount 240. Accordingly, the bracket 230 is elastically supported by the base 220 through the auxiliary pump mount 240. Therefore, the back of the pump assembly 100 can be said to be indirectly elastically supported on the base. Likewise, the front of the pump assembly can be said to be elastically supported on the direct base.

As shown in FIG. 3, it is shown that one support point is formed in front of the center of gravity of the pump assembly 200. Similarly, two support points are formed behind the center of gravity of the pump assembly 200.

Since the center of gravity front is located adjacent to the front panel or the auxiliary panel, it is desirable to form a minimum support point, preferably only one support point. It is also desirable to form support points as far from the front panel or auxiliary panel as possible. Unlike this, a plurality of support points may be formed at the rear of the pump assembly 200 based on the center of gravity of the pump assembly 200. Preferably, support points may be formed at both rear sides. Support points on both rear sides are formed by auxiliary pump mounts 240 provided on both sides.

Here, the moment distance between the center of gravity and the front support point is preferably shorter than the moment distance between the center of gravity and the rear support point. Details regarding the center of gravity and the support point will be described later.

Hereinafter, the bracket 230 and the pump mount 250 described above will be described in detail with reference to FIGS. 4 to 6.

First, the bracket 230 will be described with reference to FIG. 4.

The bracket 230 shown in FIG. 4 is configured to support the rear of the pump. That is, it is connected to the rear lower side of the pump housing. To this end, an unevenness 236 corresponding to the lower shape of the pump housing may be formed. Through the concave-convex 236, the pump housing lower side and the bracket 230 can be more firmly coupled. In addition, the rigidity of the bracket 230 may be reinforced.

In addition, coupling holes 234 and 235 to which the auxiliary pump mount 240 may be coupled are formed at both rear sides of the bracket 230. In addition, support pieces 231 and 232 are formed at both front sides of the bracket 230, and cutouts 237 are formed between both support pieces. A central portion of the drain pump housing 211 may have a tubular shape. Therefore, the lower portion of the central portion of the tubular shape is located below the cutout 237 and both sides are supported by the support pieces. The pump housing and the bracket 230 may be firmly coupled to each other through the cutout 237 and the support pieces 231 and 232.

Similarly, through holes 238 are formed in the support pieces 231 and 232 so that protrusions (not shown) formed in the pump housing may be inserted into the through holes 238. Of course, the bracket and the pump housing may be coupled through the screw and the through hole 238.

As described above, the bracket 230 only supports the rear of the pump assembly. Therefore, the size of the conventional bracket can be significantly reduced. And, since only the left and right eccentricity of the pump assembly can be considered, the pump assembly 200 can be supported more stably.

5 to 6 will be described in detail with respect to the pump mount and its fixing structure.

As shown in FIG. 5, the base 220 may have a support hole 226 through which a part of the pump mount 250 penetrates and is fixed. The support hole 226 may be formed on a surface 225 bent at a predetermined height from the lowest bottom surface of the base 220. Therefore, the vibration transmitted to the pump mount 250 may be sufficiently transmitted to the base 220. And, even though a lot of vibration is transmitted to the pump mount 250, the pump mount can be firmly fixed to the base.

The pump mount 250 may include a support part 251 positioned above the support hole 226 to directly support the pump assembly 200.

The support part 251 is a groove part 253 formed so that the front lower part of the pump assembly 200 is inserted, and an eccentric prevention part formed to prevent left and right eccentric movement of the pump assembly 200 at both sides of the groove part 253. 252 can be made. That is, the vibration of the pump assembly 200 is substantially absorbed through the groove portion 253. In addition, the depth and the width of the groove may be determined so that the pump assembly does not leave the pump mount 250 by the left and right eccentricity. By forming the groove part, the eccentric prevention part 252 is provided at both sides of the groove part 253, thereby preventing the left and right eccentric movement of the pump assembly 200. On the other hand, in order to further increase the elastic force in the support portion 251, in particular the eccentricity prevention portion 252, a plurality of through holes 256 may be formed in the eccentricity prevention portion 252 penetrating from the front to the rear.

The pump mount 250 may include a fixing part 254 fixed to the support hole 226. The fixing part 254 may be formed in a slot or groove shape on both sides thereof and may be coupled to the support hole 226 by interference fit. Therefore, it may not be easily separated by vibration after coupling.

The pump mount 250 may include a bottom portion 255 positioned below the support hole 226 to support the pump mount from the optimum bottom surface of the base.

Hereinafter, the relationship between the center of gravity and the support point of the drain pump assembly will be described in detail with reference to FIGS. 7 and 8.

As shown in FIG. 7, the center of gravity 300 of the drain pump assembly is formed. In FIG. 7, the left side is the front of the pump assembly 200.

In FIG. 7, the left side of the drain pump assembly 200 is the front of the cabinet. That is, side sectional view. As shown, the center of gravity 300 of the drain pump assembly 200 is formed. Here, the pump mount 250 is located in the front adjacent to the center of gravity of the drain pump assembly 200. Thus, the forward and backward moment distances of the front support points due to the center of gravity and the pump mount 250 are formed very short. This effectively prevents vibration or excitation of the drain pump assembly from being transmitted to the cabinet structure.

In other words, the front and rear moment distance of the front support point with respect to the center of gravity 300 is preferably shorter than the front and rear moment distance of the rear support point. That is, it is preferable to form a support point at a position very close to the center of gravity through the pump mount 250.

On the contrary, the support points due to the bracket 230 and the auxiliary pump mount 240 are formed with a relatively long moment distance. That is, it is preferable to form a support point at a position far from the center of gravity through the bracket 230 and the auxiliary pump mount 240.

That is, the pump mount 250 is in front of the center of gravity but close to the center of gravity, the auxiliary pump mount 240 is preferably provided at a position far from the rear of the center of gravity.

This makes it possible to form the support points of the pump assembly away from the cabinet structure. In addition, the number of adjacent support points in the cabinet structure can be reduced. Therefore, it is possible to effectively block the vibration and the excitation force of the pump assembly from being transmitted to the cabinet structure.

On the other hand, the pump mount 250 directly supports the pump assembly 200. Therefore, the position of the pump assembly 200 from the base can be lowered compared to the conventional support structure. That is, the distance between the base and the pump assembly can be reduced. This can support the pump assembly 200 more stably. In addition, it is possible to effectively reduce the generation of vibration and noise by reducing the width or vibration width of the front and rear or left and right vibrations.

8 is a plan view of the drain pump assembly 200. As shown in the pump assembly 200, the center of gravity 300 is formed. The pump mount is provided near the front of the center of gravity 300 of the pump assembly 200 as described above. The pump mount may have the front support points formed such that the left and right moment distances become zero (0) based on the center of gravity 300, and the rear support points may be formed on the left and right sides such that the left and right moment distances are symmetrical to each other.

Of course, the support through the motor mount 250 may not be substantially zero in moment distance. The center of gravity can change during vibration or pump operation. Therefore, the left and right eccentricity or vibration at the front support point may be compensated or absorbed by the eccentric prevention portion of the pump mount 250 as described above.

In addition, the left and right eccentricity or vibration of the pump assembly 200 may be absorbed or compensated at the support points that are symmetrical to each other. Of course, the rear support point will be formed by the coupling holes 234 and 235 of the bracket 230 and the auxiliary pump mount 240.

9 is a graph showing the effect of the embodiment according to the present invention. That is, it is a graph comparing the noise according to the support structure of the drain pump assembly.

As shown, it can be seen that in the conventional A structure and B structure, the numerical values of 53 dB and 51 dB appear when the drain pump is operated to drain the wash water, respectively. In contrast, in the present embodiment, it can be seen that a value of 43 dB is shown. Therefore, through these results, it can be seen that according to the present embodiment, vibration and noise can be significantly reduced.

In addition, it can be seen that a remarkable effect can be obtained in this embodiment even when the drain pump is idling.

200: drain pump assembly 211: drain pump housing
220: base 230: bracket
240: auxiliary pump mount 250: pump mount

Claims (20)

A cabinet having a base and a front panel;
A pump case, a drain pump connected to one side of the pump case, and a drain pump assembly provided inside the pump case and having a filter selectively communicating with the outside of the cabinet through the front panel,
The front of the pump assembly is directly elastically supported on the base, the rear of the pump assembly is elastically supported on the base via a bracket. The method of claim 1,
Washing machine, characterized in that one support point is formed in the front, based on the center of gravity of the pump assembly, the support points are formed on both sides at the rear. The method of claim 2,
The moment distance between the center of gravity and the front support point is shorter than the moment distance between the center of gravity and the rear support point. A cabinet having a base and a front panel;
A drain pump assembly having a pump case, a drain pump connected to one side of the pump case, and a filter provided inside the pump case and selectively communicating with the outside of the cabinet through the front panel;
A pump mount elastically supporting the front of the pump assembly directly to the base;
A pump bracket provided to support a rear of the pump assembly; And
And an auxiliary pump mount connected to the pump bracket to elastically support the rear of the pump assembly to the base. The method of claim 4, wherein
Washing machine, characterized in that the base is formed with a support hole through which a portion of the pump mount is fixed. The method of claim 5, wherein
The support hole is a washing machine, characterized in that formed on the surface bent at a predetermined height from the lowest bottom surface of the base. The method according to claim 6,
The pump mount,
A support part positioned on the support hole to directly support the pump assembly;
A fixing part fixed to the support hole; And
And a bottom portion positioned below the support hole to support the pump mount from the optimum bottom surface of the base. The method of claim 7, wherein
And the support portion includes a groove portion formed to insert a lower portion of the pump assembly and an eccentric prevention portion formed to prevent eccentric movement of the pump assembly at both sides of the groove portion. The method of claim 8,
Washing machine, characterized in that the eccentric prevention portion is formed with a plurality of through holes penetrating from the front to the rear. The method of claim 4, wherein
Washing machine, characterized in that the other side of the pump case is provided with a circulation pump. A cabinet having a base and a front panel;
A drain pump assembly having a pump case, a drain pump connected to one side of the pump case, and a filter provided inside the pump case and selectively communicating with the outside of the cabinet through the front panel; And
It comprises a support means for supporting the drain pump assembly to the base,
Washing machine, characterized in that the support means is configured to have a greater number of support points in the rear than the number of support points in front of the center of gravity of the drain pump assembly. The method of claim 11,
The front support point is a washing machine, characterized in that formed by interposing a direct pump mount between the drain pump assembly and the base. 13. The method according to claim 11 or 12,
The rear support point is formed by a bracket connected to the drain pump assembly and an auxiliary pump mount interposed between the bracket and the base. The method of claim 13,
Washing machine, characterized in that the base is formed with a support hole through which a portion of the pump mount is fixed. 15. The method of claim 14,
The support hole is a washing machine, characterized in that formed on the surface bent at a predetermined height from the lowest bottom surface of the base. The method of claim 15,
The pump mount,
A support part positioned on the support hole to directly support the pump assembly;
A fixing part fixed to the support hole; And
And a bottom portion positioned below the support hole to support the pump mount from the optimum bottom surface of the base. 17. The method of claim 16,
And the support portion includes a groove portion formed to insert a lower portion of the pump assembly and an eccentric prevention portion formed to prevent eccentric movement of the pump assembly at both sides of the groove portion. The method of claim 17,
Washing machine, characterized in that the eccentric prevention portion is formed with a plurality of through holes penetrating from the front to the rear. The method of claim 11,
Washing machine, characterized in that the front and rear moment distance of the front support point is shorter than the front and rear direction moment distance of the rear support point. The method of claim 11,
The front support point is formed so that the lateral moment distance is zero (0) based on the center of gravity, and the rear support point is formed on the left and right so that the lateral moment distance is symmetrical to each other.

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