JP2020146367A - Washing machine - Google Patents

Abstract

To provide a washing machine capable of suppressing deterioration in strength and rigidity of an outer case, even when the thickness of the outer case is reduced.SOLUTION: A washing machine includes: an outer case; a water tub stored in the outer case; a vibration-proof member for supporting the water tub; and a reinforcement member for reinforcing the outer case. In the outer case, a front surface, a left surface and a right surface or a rear surface, the left surface and the right surface are made of one piece of metal plate. On the left surface and the right surface of the outer case, a plurality of reinforcement throttle parts which are a concave shape protruding to the inner side of the outer case or a convex shape protruding to the outer side of the outer case are provided. The reinforcement members are provided at the corners of the outer case. The reinforcement throttle parts are provided so as to extend further to the front side or the rear side than at least one end part of the reinforcement member.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to washing machines.

The outer box constituting the outer shell of the washing machine is formed of a metal plate material (see, for example, Patent Document 1). Here, in recent years, it has become necessary to control the manufacturing cost of various products, and in the technical field of washing machines, as an example of means for controlling the manufacturing cost, from a metal plate material. It is considered to make the outer box thinner. However, as the outer box becomes thinner, the strength and rigidity of the outer box decrease, and it becomes difficult to suppress the generation of vibration and noise during operation.

Japanese Unexamined Patent Publication No. 2014-066792

Provided is a washing machine capable of suppressing a decrease in strength and rigidity of the outer box even if the outer box is made thinner.

The washing machine according to the present embodiment includes an outer box, a water tank housed in the outer box, a vibration-proof member for supporting the water tank, and a reinforcing member for reinforcing the outer box. , Front surface, left surface, right surface, or rear surface, left surface, right surface are composed of one metal plate, and the left surface and right surface of the outer box have a concave shape protruding toward the inside of the outer box or the outside of the outer box. A plurality of convex reinforcing squeezing portions projecting to the side are provided, the reinforcing member is provided at a corner of the outer box, and the reinforcing squeezing portion is on the front side of at least one end of the reinforcing member or Provide to extend to the rear side.

Longitudinal side view schematically showing a configuration example of the washing machine according to the first embodiment A perspective view schematically showing a configuration example of the outer box according to the first embodiment. A plan view schematically showing a configuration example of the reinforcing plate and its peripheral portion according to the first embodiment. FIG. 6 for explaining an example of the positional relationship between the reinforcing diaphragm portion and the reinforcing plate according to the first embodiment (No. 1). FIG. 2 for explaining an example of the positional relationship between the reinforcing diaphragm portion and the reinforcing plate according to the first embodiment (No. 2). The figure which shows typically the arrangement example of the reinforcing diaphragm part which concerns on 1st Embodiment The figure for demonstrating an example of the positional relationship between the bottom surface of the reinforcing throttle part and the side wall surface of a water tank which concerns on 1st Embodiment. Perspective view schematically showing a configuration example of the outer box according to the second embodiment (No. 1) Perspective view schematically showing a configuration example of the outer box according to the second embodiment (No. 2)

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In each embodiment, substantially the same elements are designated by the same reference numerals, and the description thereof will be omitted.

(First Embodiment)
The vertical washing machine according to the first embodiment will be described with reference to the drawings. FIG. 1 is a vertical sectional side view of the washing machine 10 according to the present embodiment. The washing machine 10 includes an outer box 11, a top cover 12, a water tank 13, a rotary tank 14, a drive device 15, a water injection device 16, a drainage device 17, an operation panel 18, a reinforcing plate 19, and a hanging rod 20. The outer box 11 is formed in a rectangular hollow box shape by a metal plate material such as a stainless steel plate, and constitutes the outer shell of the washing machine 10.

The water tank 13 is formed in a bottomed cylindrical shape with an opening at the top, and can store water inside. The water tank 13 includes a water tank cover 131 and a water tank opening 132. The water tank cover 131 is provided so as to cover a part of the water tank opening 132 from the upper end of the water tank 13. The user can put the laundry in and out of the rotary tub 14 through the water tub opening 132. Further, the water tank 13 includes an inner lid 133 that opens and closes the water tank opening 132.

The rotary tub 14 is formed in a bottomed cylindrical shape capable of accommodating laundry, and is rotatably provided inside the water tub 13. The rotary tub 14 functions as a washing tub in the washing process for washing the laundry and the rinsing process for rinsing the laundry. The rotary tank 14 also functions as a dehydration tank in the dehydration process for dehydrating the laundry. The rotary tank 14 is provided with a pulsator 141 at the bottom thereof. The pulsator 141 is rotatable integrally with the rotary tank 14 or relative to the rotary tank 14.

The drive device 15 has a motor and a clutch mechanism (not shown). The motor is connected to the pulsator 141 and rotates the pulsator 141 in the forward and reverse directions. The clutch mechanism transmits the driving force of the motor to the rotary tank 14. The clutch mechanism has a function of switching the transmission of the driving force of the motor to rotate only the pulsator 141 or the pulsator 141 and the rotary tank 14 integrally.

The water injection device 16 is a device for injecting water supplied from an external water source such as a water supply into the inside of the water tank 13. The water injection device 16 is provided inside the outer box 11, for example, at the upper part of the water tank 13 on the left or right side. The water injection device 16 has a water supply valve 161, a water injection hose 162, and a water injection case 163. The water supply valve 161 is, for example, an electromagnetically driven on-off valve, and is connected to an external water source such as a water supply (not shown). The water injection hose 162 connects the water injection case 163 and the inside of the water tank 13. The water supply valve 161 opens and closes a water injection path from an external water source to the inside of the water tank 13 via a water injection case 163 and a water injection hose 162.

The drainage device 17 is a device for draining the water stored inside the water tank 13 to the outside of the washing machine 10. The drainage device 17 includes a drainage valve 171 and a drainage pipe 172. The drain valve 171 is, for example, an electromagnetically driven on-off valve. The drain valve 171 opens and closes a drainage path from the inside of the water tank 13 to the outside of the machine via the drainage device 17.

In this case, the operation panel 18 is provided on the front portion of the upper surface of the top cover 12. The operation panel 18 accepts the user's operation and displays the input operation content, setting content, current operation content, and the like.

As shown in FIG. 2, a plurality of outer boxes 11 are formed by combining two members, a front plate 111 and a rear plate 112 in this case. Both the front plate 111 and the rear plate 112 are formed of a metal plate material such as a stainless steel plate. The front plate 111 and the rear plate 112 are formed of at least a plate material thinner than the plate material conventionally used by the applicant, and the thickness thereof is, for example, 0.5 mm. The thickness of the front plate 111 and the rear plate 112 can be appropriately changed, for example, 0.5 mm or less.

The front plate 111 is formed by bending both ends of one metal plate material in the longitudinal direction in the same direction, in this case, in the direction behind the washing machine 10, and is substantially U-shaped when viewed in the vertical direction. It has a shape. The front plate 111 constitutes the front surface of the outer box 11 and both left and right side surfaces. The rear plate 112 is made of a single metal plate material, and its end portion is substantially plate-shaped without being bent. The rear plate 112 is attached so as to close the open portion formed at the rear portion of the front plate 111, and constitutes the rear surface of the outer box 11.

The outer box 11 has a substantially rectangular tubular shape by combining the front plate 111 and the rear plate 112 described above. Reinforcing plates 19 are installed at the four corners on the upper side of the outer box 11. The reinforcing plate 19 is an example of a reinforcing member for reinforcing the outer box 11.

As illustrated in FIG. 3, the reinforcing plate 19 is joined to each corner of the outer box 11 by a plurality of joints 192. In the present disclosure, as a method of joining the reinforcing plate 19, for example, a spot welding method or a fixing method using screws can be used. The reinforcing plate 19 has a hanging portion 191. The hanging portion 191 has a shape cut out outward in a portion of the reinforcing plate 19 that is the inner side of the outer box 11. As illustrated in FIG. 1, the upper end portion of the hanging rod 20 is fixed to the hanging portion 191. Further, the lower end portion of the hanging rod 20 is elastically connected to the lower portion of the side surface of the water tank 13. The washing machine 10 has a configuration in which the water tank 13 is elastically suspended in the outer box 11 by connecting the plurality of reinforcing plates 19 and the water tank 13 with a plurality of hanging rods 20. The hanging rod 20 is an example of an anti-vibration member for elastically supporting the water tank 13. Further, the hanging portion 191 is an example of a vibration isolator supporting portion for supporting the hanging rod 20.

Further, as illustrated in FIG. 2, of the front plate 111, the surfaces forming the left and right side surfaces of the outer box 11 are provided with reinforcing throttle portions 21 for reinforcing the strength and rigidity of the outer box 11. Has been done. In this case, the reinforcing throttle portion 21 is formed in the front plate 111 in a concave shape protruding toward the inside of the outer box 11. The reinforcing throttle portion 21 may be formed in the front plate 111 in a convex shape so as to project toward the outside of the outer box 11. A plurality of reinforcing throttle portions 21 are provided on each of the left and right side surfaces of the outer box 11. Further, the reinforcing diaphragm portion 21 is provided so as to be symmetrical on the left and right side surfaces of the outer box 11. The reinforcing diaphragm portion 21 may be provided so as to be asymmetrical on the left and right side surfaces of the outer box 11.

Further, the reinforcing squeezing portion 21 extends linearly along the front-rear direction of the washing machine 10. Of both ends of the reinforcing squeezing portion 21 in the longitudinal direction, the end portion on the front side of the washing machine 10 is the portion of the reinforcing plate 19 on the front side of the outer box 11 that is on the side surface side of the outer box 11. It extends to the front side from the rear end. Further, of both ends of the reinforcing squeezing portion 21 in the longitudinal direction, the end portion on the rear surface side of the washing machine 10 is the portion of the reinforcing plate 19 on the rear surface side of the outer box 11 that is on the side surface side of the outer box 11. It extends to the rear side of the front end of the.

As shown in FIG. 4, the front end portion of the reinforcing throttle portion 21, that is, the end portion of the front side reinforcing plate 19 extending to the front side from the rear end portion of the portion of the outer box 11 on the side surface side is At least one of a plurality of joints 192 formed on the side surface side portion of the outer box 11 of the front reinforcing plate 19, in this case, extending to the front side from the rear joint 192. It is good to provide it. That is, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the front side from the position indicated by the broken line A in FIG. Further, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the front side of the joint portion 192 on the front side. That is, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the front side from the position indicated by the broken line B in FIG. Further, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the front side of the hanging portion 191 of the reinforcing plate 19. That is, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the front side from the position indicated by the broken line C in FIG.

Further, as shown in FIG. 5, the rear end portion of the reinforcing throttle portion 21, that is, the end portion of the reinforcing plate 19 on the rear side that extends to the rear surface side from the front end portion of the portion on the side surface side of the outer box 11 , At least one of a plurality of joints 192 formed on the side surface side portion of the outer box 11 of the rear reinforcing plate 19, in this case, extending to the rear side of the front joint 192. It is good to install it in. That is, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the rear surface side from the position indicated by the broken line A in FIG. Further, the rear end portion of the reinforcing throttle portion 21 may be provided so as to extend to the rear surface side of the joint portion 192 on the rear side. That is, the rear end portion of the reinforcing throttle portion 21 may be provided so as to extend to the rear surface side from the position indicated by the broken line B in FIG. Further, the rear end portion of the reinforcing throttle portion 21 may be provided so as to extend to the rear surface side of the hanging portion 191 of the reinforcing plate 19. That is, the front end portion of the reinforcing throttle portion 21 may be provided so as to extend to the rear surface side from the position indicated by the broken line C in FIG.

By configuring the reinforcing throttle portion 21 as illustrated in FIGS. 4 and 5, the reinforcing throttle portion 21 is at least from the rear end portion of the reinforcing plate 19 provided on the front side of the outer box 11 to the outer box 11. The length may be longer than the length to the front end portion of the reinforcing plate 19 provided on the rear surface side. Further, the reinforcing throttle portion 21 can be extended to the front side from the hanging portion 191 of the reinforcing plate 19 on the front side, and extends to the rear surface side from the hanging portion 191 of the reinforcing plate 19 on the rear surface side. It can be extended. The reinforcing throttle portion 21 extends to the front side from the hanging portion 191 of the reinforcing plate 19 on the front surface side, or extends to the rear surface side from the hanging portion 191 of the reinforcing plate 19 on the rear surface side. You may.

Further, as illustrated in FIG. 6, the washing machine 10 may be provided with a plurality of reinforcing throttle portions 21 between the height T1 at the upper end of the water tank 13 and the height T2 at the lower end of the water tank 13. Further, the washing machine 10 may be provided with at least one reinforcing drawing portion 21 on the upper side and the lower side of the height T3 of the central portion in the vertical direction of the water tank 13. In the configuration example illustrated in FIG. 6, the washing machine 10 has three reinforcing throttle portions 21 above the height T3 of the vertical central portion of the water tank 13, and is located at the vertical central portion of the water tank 13. It has three reinforcing throttle portions 21 below the height T3. Further, the washing machine 10 has three reinforcing drawing portions 21 between the height T1 at the upper end of the water tank 13 and the height T3 at the center, and the height T2 at the lower end of the water tank 13 to the height at the center. It is configured to have two reinforcing throttle portions 21 up to T3.

Further, as illustrated in FIG. 7, the bottom surfaces of the plurality of reinforcing throttle portions 21 may be configured to have the same distance α from the side wall surface of the water tank 13 and be separated from each other. The water tank 13 has a structure in which the diameter on the upper side is larger than the diameter on the lower side, in other words, it has a cylindrical shape that expands from the lower side to the upper side. Therefore, in the configuration example illustrated in FIG. 7, the reinforcing diaphragm portion provided on the upper side so that the gap between the bottom surface of the plurality of reinforcing throttle portions 21 and the side wall surface of the water tank 13 is unified by a predetermined gap α. The bottom surface is shallower by about 21, that is, the amount of protrusion inward of the outer box 11 is reduced, and the bottom surface is deeper by the reinforcing diaphragm portion 21 provided on the lower side, that is, the amount of protrusion of the outer box 11 is increased. ing.

Further, the washing machine 10 may have a configuration in which a plurality of reinforcing squeezing portions 21 have different sizes. In the configuration example illustrated in FIG. 7, the reinforcing throttle portion 21 provided on the upper side is formed smaller, and the reinforcing throttle portion 21 provided on the lower side is formed larger.

According to the embodiment described above, the washing machine 10 is provided with a plurality of reinforcing squeezing portions 21 on both left and right side surfaces of the outer box 11. The reinforcing drawing portion 21 is formed to be long along the front-rear direction of the washing machine 10. In this way, by providing the outer box 11 with the reinforcing squeezing portion 21 along the front-rear direction of the washing machine 10, even if the outer box 11 and, in this case, the front plate 111 constituting a part thereof are thinned. , It is possible to suppress a decrease in the strength and rigidity of the outer box 11.

Further, the ends of the reinforcing squeezing portions 21 in the longitudinal direction on the front side of the washing machine 10 are after the reinforcing plates 19 on the front side of the reinforcing plates 19 provided at the four corners of the outer box 11. It is preferable to extend to the front side from the end. Further, the ends of the reinforcing squeezing portions 21 in the longitudinal direction on the rear surface side of the washing machine 10 are the front ends of the reinforcing plates 19 on the rear surface side of the reinforcing plates 19 provided at the four corners of the outer box 11. It is preferable to extend to the rear surface side from the portion. That is, the reinforcing throttle portion 21 is longer than the length from the rear end portion of the reinforcing plate 19 provided on the front surface side of the outer box 11 to the front end portion of the reinforcing plate 19 provided on the rear surface side of the outer box 11. It should be configured. By providing the reinforcing squeezing portion 21 that is sufficiently long in this way, the effect of the reinforcing squeezing portion 21 is exerted on the reinforcing plate 19 and its peripheral portion, which are easily affected by the load of the water tank 13 in the outer box 11. This makes it possible to further suppress a decrease in the strength and rigidity of the outer box 11. Further, by providing the outer box 11 with a plurality of reinforcing throttle portions 21, the natural frequency of the outer box 11 can be easily increased, and the propagated sound of the vibration can be reduced.

The washing machine 10 has reinforcing squeezing portions 21 having the front-rear direction of the washing machine 10 in the longitudinal direction on both side surfaces of the outer box 11, and the front side of both ends of the reinforcing squeezing portion 21 in the longitudinal direction. The end portion of the outer box 11 extends to the front side from the rear end portion of the reinforcing plate 19 on the front side of the outer box 11, and the end portion on the rear surface side of both ends in the longitudinal direction of the reinforcing throttle portion 21 is outside. It is recommended that the reinforcing plate 19 on the rear surface side of the box 11 extends to the rear surface side from the front end portion. According to such a configuration, strength and rigidity can be ensured even in the outer box 11 which has been made thinner, and vibration and noise can be suppressed.

Further, a plurality of reinforcing throttle portions 21 are provided between the height T1 at the upper end of the water tank 13 and the height T2 at the lower end of the water tank 13, that is, they face the entire side wall surface of the water tank 13. By providing the plurality of reinforcing throttle portions 21 in a dispersed manner, it is possible to further increase the natural frequency of the front plate 111. Then, by increasing the natural frequency of the front plate 111, the outer box 11, particularly the front plate 111 provided with the reinforcing throttle portion 21, resonates due to the vibration generated when the washing machine 10 operates. It can be easily suppressed. Therefore, vibration and noise can be effectively suppressed.

Further, by providing at least one reinforcing squeezing portion 21 on the upper side and the lower side of the height T3 of the central portion in the vertical direction of the water tank 13, a plurality of reinforcing squeezing portions 21 are distributed in the vertical direction. The configuration can be realized, the natural frequency of the front plate 111 can be easily increased, and vibration and noise can be easily suppressed.

Further, according to the washing machine 10, the bottom surfaces of the plurality of reinforcing throttle portions 21 have the same distance from the side wall surface of the water tank 13, and are separated from each other. According to this configuration, the gap between the water tank 13 and the outer box 11, particularly the bottom surface of the reinforcing throttle portion 21, can be maintained at an appropriate distance, and the contact between the water tank 13 and the outer box 11 can be suppressed. ..

(Second Embodiment)
Next, the second embodiment will be described with reference to FIG. This embodiment is the same as that of the first embodiment except for the reinforcing throttle portion 21 shown in FIG. That is, in this embodiment, the range in which the reinforcing throttle portion is provided in the outer box 11 is different from that in the first embodiment. As illustrated in FIG. 8, the reinforcing throttle portion 221 extends not only to both side surfaces of the outer box 11 but also to the front surface of the outer box 11.

Specifically, the front end of the reinforcing throttle portion 221 extends to the surface of the front plate 111 that constitutes the front surface of the outer box 11. Further, the front end portion of the reinforcing throttle portion 221 extends to a position facing the front surface side portion of the reinforcing plate 19 on the front surface side of the outer box 11. It should be noted that the reinforcing throttle portion 221 is not provided in the portion of the front plate 111 located between the left and right reinforcing plates 19. Therefore, the left and right reinforcing throttle portions 221 are divided at a portion of the front plate 111 located between the left and right reinforcing plates 19, and are not configured to be continuous with each other along the left and right directions.

According to the second embodiment described above, the front end portion of the reinforcing throttle portion 221 provided on the side surface of the front plate 111 extends to the front surface of the front plate 111. According to the reinforcing throttle portion 221 configured in this way, the reinforcing plate 19 and its peripheral portion, which are easily affected by the load of the water tank 13, can be supported not only from the side surface side but also from the front surface side. That is, it is possible to increase the portion of the reinforcing plate 19 and its peripheral portion that are easily affected by the load of the water tank 13 by the reinforcing throttle portion 221 and to further disperse the load applied to the outer box 11.

As illustrated in FIG. 9, the washing machine 10 may be configured to include a reinforcing squeezing portion 321 that is continuous over the left and right side surfaces and the front surface of the outer box 11. The reinforcing throttle portion 321 is defined as one in which the reinforcing throttle portion provided on the front surface of the outer box 11 is integrated with the reinforcing throttle portion provided on the left side surface and the right side surface of the outer box 11. be able to. That is, the washing machine 10 may have a configuration in which the reinforcing squeezing portions on the left and right side surfaces are extended to the front surface of the outer box 11 and connected at the front surface of the outer box 11. The washing machine 10 may have a configuration in which the reinforcing squeezing portion provided on the front surface of the outer box 11 is integrated with the reinforcing squeezing portion provided on the left side surface or the right side surface of the outer box 11.

(Other embodiments)
It should be noted that this embodiment is not limited to the plurality of embodiments described above, and various changes and extensions can be made without departing from the gist thereof. For example, the reinforcing throttle portion 21 may be configured to extend to the front side or the rear side from at least one end portion of the reinforcing plate 19. That is, the reinforcing throttle portion 21 may be configured to extend to the front side of the rear end portion of the reinforcing plate 19 on the front side or to the rear side of the front end portion of the reinforcing plate 19 on the rear side.

Further, the washing machine 10 is configured to include a rear plate in which the rear surface of the outer box 11 and the portions constituting the left and right side surfaces are integrated, and a front plate constituting the front surface of the outer box 11, and the rear plate is reinforced. It may be configured to include the drawing unit 21. Further, the washing machine 10 may have a configuration in which the reinforcing squeezing portion provided on the rear surface of the outer box 11 is integrated with the reinforcing squeezing portion provided on the left side surface and the right side surface of the outer box 11. , The configuration may be integrated with the reinforcing throttle portion provided on the left side surface or the right side surface of the outer box 11.

Further, the washing machine 10 may be configured such that the reinforcing squeezing portion is provided asymmetrically. Further, the washing machine 10 may have a configuration in which the bottom surfaces of the plurality of reinforcing squeezing portions are separated from each other with different distances from the side wall surfaces of the water tank 13.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof include the invention included in the claims and the equivalent scope thereof, as well as the scope and gist of the invention.

In the drawing, 10 is a washing machine, 11 is an outer box, 13 is a water tank, 19 is a reinforcing plate (reinforcing member), 20 is a fishing rod (vibration-proofing member), 21 is a reinforcing throttle part, and 191 is a hanging part (vibration-proofing member). Support portion), 192 indicates a joint portion.

Claims (10)

With the outer box
The water tank housed in the outer box and
The anti-vibration member that supports the water tank and
A reinforcing member for reinforcing the outer box is provided.
The outer box is composed of one metal plate on the front surface, the left surface, the right surface, or the rear surface, the left surface, and the right surface.
On the left and right surfaces of the outer box, a plurality of concave reinforcing squeezing portions projecting toward the inside of the outer box or protruding toward the outside of the outer box are provided.
The reinforcing member is provided in the corner of the outer box.
The reinforcing squeezing portion is a washing machine that extends to the front side or the rear side from at least one end of the reinforcing member. The first aspect of claim 1, wherein the reinforcing throttle portion is longer than the length from the rear end portion of the reinforcing member provided on the front surface side of the outer box to the front end portion of the reinforcing member provided on the rear surface side of the outer box. Washing machine. The reinforcing member includes a vibration-proof member support portion that supports the vibration-proof member.
The washing machine according to claim 1 or 2, wherein the reinforcing throttle portion extends to the front side or the rear side of the vibration-proof member support portion. The reinforcing member includes a joint portion to be joined to the outer box.
The washing machine according to any one of claims 1 to 3, wherein the reinforcing drawing portion extends to the front side or the rear side of the joint portion. The washing machine according to any one of claims 1 to 4, wherein a plurality of reinforcing squeezing portions are provided between the height of the upper end of the water tank and the height of the lower end of the water tank. The washing machine according to claim 5, wherein at least one reinforcing squeezing portion is provided above and below the height of the central portion in the vertical direction of the water tank. The washing machine according to any one of claims 1 to 6, wherein the reinforcing squeezing portion is further provided on the front surface or the rear surface of the outer box. The washing machine according to claim 7, wherein the reinforcing squeezing portion provided on the front surface or the rear surface of the outer box is integrated with the reinforcing squeezing portion provided on the left surface or the right surface of the outer box. .. The washing machine according to any one of claims 1 to 8, wherein the reinforcing squeezing portion is provided symmetrically. The washing machine according to any one of claims 1 to 9, wherein the bottom surfaces of the plurality of reinforcing throttle portions are separated from each other with the same distance from the side wall surface of the water tank.

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