washing machine

Abstract

A washing machine comprises a washing tank for storing laundry, a stirring body arranged at the bottom of the washing tank and rotating, and a brush mechanism arranged inside the washing tank. The brush mechanism comprises a fixed component, and a plurality of brush portions protruding from the fixed component and arranged along the rotation direction of the stirring body. Each of the plurality of brush portions has an outer shape extending along the axial direction of the stirring body, and extends from the fixed component in a direction intersecting the axial direction. The plurality of brush portions comprises a first brush portion protruding from the fixed component in a first direction and a second brush portion protruding from the fixed component in a second direction intersecting the first direction.

Description

Technical Field

[0001] The invention relates to a washing machine. Background Art

[0002] For example, Utility Model Publication No. 61-190978 describes an example of a shoe washing machine. The shoe washing machine described in Utility Model Publication No. 61-190978 includes a shoe rack and a brush. The shoe rack is fixed to a rotating shaft located in the center of a washing tank. The brush is fixed to a brush holder located outside the shoe rack in the diameter direction. The brush is fixed in a manner that the tip side of the bristles faces the shoes fixed to the shoe rack.

[0003] When cleaning shoes, the rotation of the brush part fixed on the brush holder is suppressed, and the shoe holder part fixed to the rotating shaft rotates. Thus, the brush part and the shoes are repeatedly contacted, and the shoes are cleaned by the brush part.

[0004] In the shoe washing machine described in Utility Model Publication No. 61-190978, the brush portion has a plurality of bristles planted on a flat plate, and the plurality of bristles are arranged in a matrix along a first direction parallel to the rotation axis and a second direction perpendicular to the first direction. Summary of the invention

[0005] In the shoe washing machine described in Utility Model Publication No. 61-190978, the hairs of the brush part extend parallel to each other toward the rotation axis. Therefore, the contact angle between the rotating shoes and the hairs becomes relatively small during washing, and the cleaning effect of the brush part on the shoes may become weak.

[0006] An object of one embodiment of the present invention is to provide a washing machine capable of improving the cleaning effect of laundry by a brush.

[0007] A washing machine according to one embodiment of the present invention comprises a washing tank into which laundry is placed, a stirring body arranged at the bottom of the washing tank and rotating, and a brush mechanism arranged inside the washing tank. The brush mechanism comprises a fixed component and a plurality of brush portions protruding from the fixed component and arranged along the rotation direction of the stirring body. Each of the plurality of brush portions has an outer shape extending along the axial direction of the stirring body, and extends from the fixed component in a direction intersecting the axial direction. The plurality of brush portions comprises a first brush portion protruding from the fixed component in a first direction and a second brush portion protruding from the fixed component in a second direction intersecting the first direction.

[0008] BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective schematic diagram of the washing machine according to the first embodiment.

[0010] Figure 2It is a schematic cross-sectional view of the washing machine according to the first embodiment.

[0011] Figure 3 It is a schematic plan view showing the main part of the washing tank in the first embodiment.

[0012] Figure 4 It is a cross-sectional schematic diagram showing a part of the brush module in the first embodiment.

[0013] Figure 5 It is a schematic plan view of the washing tub in which the laundry is placed in the first embodiment.

[0014] Fig. 6A This is a schematic plan view of a portion of the washing tub, showing a contact state between the laundry and the brush module during washing in the first embodiment.

[0015] Figure 6B This is a schematic plan view of a portion of the washing tub showing another contact state between the laundry and the brush module during washing in the first embodiment.

[0016] Fig. 7A It is a schematic plan view of a part of a washing tub, showing a contact state between an object to be washed and a brush module during washing in a comparative example.

[0017] Figure 7B It is a schematic plan view of a part of the washing tub showing another contact state between the laundry and the brush module during washing in a comparative example.

[0018] Figure 8 It is a schematic plan view of a washing tub in which laundry is placed in the second embodiment.

[0019] Fig. 9 This is a schematic plan view of a portion of a washing tub, showing a contact state between laundry and a brush module during washing in the second embodiment.

[0020] Fig.10 It is a front view and a bottom view of the brush module in the third embodiment.

[0021] Fig.11 It is a bottom schematic diagram showing a part of the brush module in the third embodiment.

[0022] Fig.12 It is a front view and a bottom view of the brush module in the fourth embodiment.

[0023] Fig.13 It is a schematic plan view of a washing tub in which laundry is placed in a first modified example.

[0024] Fig.14 4 is a schematic top view of a brush module in a second variation.

[0025] Fig.15 1 is a schematic bottom view showing a part of the brush module in the third embodiment. DETAILED DESCRIPTION

[0026] Hereinafter, an example of a preferred embodiment of the present invention will be described. However, the following embodiment is merely an example, and the present invention is not limited to the following embodiment.

[0027] (First Embodiment)

[0028] A washing machine 1 according to a first embodiment of the present invention will be described. Figure 1 It is a perspective schematic diagram of the washing machine 1 according to the first embodiment. Figure 2 It is a schematic cross-sectional view of the washing machine 1 according to the first embodiment. Figure 3 The schematic plan view shows the main part of the washing tub 12 in the first embodiment.

[0029] Figure 1 and Figure 2 The washing machine 1 shown is suitable for washing laundry 9 including solid parts (see Figure 5 ) washing machine. For example, the laundry 9 including solid parts may include shoes, slippers, sandals and the like. The washing machine 1 is not particularly limited as long as it can wash the laundry 9, but preferably it is a washing machine that can wash and dehydrate the laundry 9. That is, the washing machine 1 is preferably a washing and dehydrating machine.

[0030] (Schematic Structure of Washing Machine 1)

[0031] Reference Figure 1 and Figure 2 The schematic structure of washing machine 1 will be described.

[0032] like Figure 1 As shown, the washing machine 1 includes an outer box 10 , an upper part 20 , an upper cover 30 and a base part 40 .

[0033] like Figure 2 As shown in FIG. 1 , the outer box 10 is formed in a cylindrical shape that is open upward and downward. The upper opening of the outer box 10 is connected to the upper member 20 . On the other hand, the lower opening of the outer box 10 is connected to the base member 40 .

[0034] The upper member 20 is formed with an opening 21 for inserting and removing the laundry 9. The opening 21 can be opened and closed by an upper cover 30 rotatably mounted on the upper member 20.

[0035] A water tank 11 is disposed in the outer box 10. The water tank 11 is a substantially bottomed cylindrical shape with an opening at the top. The opening of the water tank 11 is connected to the opening 21. A drain portion for draining water in the water tank 11 is provided at the bottom of the water tank 11.

[0036] A washing tank 12 is provided in the water tank 11. The washing tank 12 is also roughly cylindrical with a bottom and an opening at the top, like the water tank 11. The washing tank 12 and the water tank 11 are configured so that their rotation axes are consistent with each other. The washing tank 12 is rotatable relative to the water tank 11. While a water-repelling portion is formed at the bottom of the washing tank 12, a plurality of drainage holes are formed at the uppermost portion of the peripheral wall of the washing tank 12, and no drainage holes are formed in other portions of the peripheral wall of the washing tank 12. However, the present invention is not limited to this structure. In the present invention, a plurality of drainage holes for drainage during dehydration may also be formed in substantially the entire area of ​​the peripheral wall of the washing tank 12.

[0037] A stirring body 13 is provided at the bottom of the washing tub 12. The stirring body 13 is a component for stirring the water in the washing tub 12. The stirring body 13 is rotatable relative to the washing tub 12. The rotation axis of the stirring body 13 is consistent with the rotation axis of the washing tub 12. The stirring body 13 is connected to a driving mechanism 50. The driving mechanism 50 is arranged below the washing tub 12. The stirring body 13 is rotationally driven by the driving mechanism 50.

[0038] In addition, the driving mechanism 50 drives the washing tub 12 to rotate. A clutch is provided between the driving mechanism 50 and the washing tub 12 and the agitator 13. The clutch 51 can switch the state in which the power of the driving mechanism 50 is transmitted to the washing tub 12 and the agitator 13 and the state in which the power is transmitted only to the agitator 13. In the state in which only the agitator 13 and the driving mechanism 50 of the washing tub 12 and the agitator 13 are connected by the clutch 51, the washing tub 12 can rotate in both directions relative to the water tub 11 and the agitator 13 in the forward direction and the reverse direction. However, in the present invention, in the state in which only the agitator 13 and the driving mechanism 50 of the washing tub 12 and the agitator 13 are connected by the clutch 51, the washing tub 12 can also be non-rotatable relative to the water tub 11.

[0039] A plurality of support portions 14 are disposed in the washing tank 12 (see Figure 5 ). The support part 14 is a component to which the laundry 9 is fixed. In the present embodiment, the plurality of support parts 14 are rotatably provided relative to the washing tub 12. Specifically, the plurality of support parts 14 are provided on the stirring body 13. Therefore, the plurality of support parts 14 rotate together with the stirring body 13.

[0040] A plurality of support parts 14 are provided around the rotating shaft of the stirring body 13. The number of support parts 14 of the stirring body 13 is not particularly limited. For example, the stirring body 13 preferably has 2 to 10 support parts 14, and more preferably has 4 to 6 support parts 14. By increasing the support parts 14, a plurality of objects 9 to be washed can be washed at the same time, but a large washing tank 12 is required to configure the support parts 14. If the support parts 14 are excessively configured on the washing tank 12, the objects 9 to be washed will be close to each other, thereby interfering with each other and may not be fully washed. For example, in the case of shoes, one pair is required for each side, so an even number of support parts 14 is required, 4 support parts 14 are required for 2 pairs, and 6 support parts 14 are required for 3 pairs. By arranging the support parts 14 at equal intervals, imbalance during dehydration can be prevented.

[0041] The support part 14 may be constituted by, for example, a rod-shaped body or a plate-shaped body extending upward from the agitator 13. In this case, for example, the rod-shaped body or the plate-shaped body constituting the support part 14 may be inserted into shoes or the like as the laundry 9, thereby fixing the laundry 9.

[0042] In addition, in the present invention, “fixed” includes not only a case where the fixed object cannot be displaced at all relative to the fixed object, but also a case where the displacement of the fixed object relative to the fixed object is restricted.

[0043] like Figure 2 and Figure 3 As shown, a brush mechanism 6 is provided inside the washing tank 12. In this embodiment, the brush mechanism 6 is non-rotatably provided relative to the washing tank 12. Specifically, the brush mechanism 6 is detachably mounted on the inner circumferential surface 12a of the washing tank 12. Therefore, the support portion 14 can rotate relative to the brush mechanism 6.

[0044] The brush mechanism 6 is provided only on a portion of the entire circumference of the inner circumferential surface 12a of the washing tank 12. In other words, the brush mechanism 6 is not provided on the entire circumference of the inner circumferential surface 12a of the washing tank 12. In the first embodiment, only one brush mechanism 6 is provided, and the brush mechanism 6 is provided so that the central angle is within the range of about 10° to 45°.

[0045] The brush mechanism 6 and the support portion 14 may be opposite to each other in the radial direction of the washing tub 12. When the brush mechanism 6 and the support portion 14 are arranged along the radial direction of the washing tub 12, the brush mechanism 6 and the support portion 14 are opposite to each other in the radial direction of the washing tub 12.

[0046] Mainly as Figure 3 As shown, the brush mechanism 6 includes a fixing member 61 and at least one brush module 62. The fixing member 61 is a member for fixing at least one brush module 62 on the washing tank 12. The fixing member 61 is detachably mounted on the inner circumferential surface 12a of the washing tank 12.

[0047] like Figure 3 As shown, in this embodiment, the brush mechanism 6 includes two brush modules 62, namely a first brush module 621 and a second brush module 622. The brush modules 621 and 622 are respectively mounted on the fixing member 61. The brush modules 621 and 622 may be detachable from the fixing member 61 or may be non-detachable.

[0048] Figure 4 FIG. 2 is a schematic cross-sectional view showing a portion of the brush module 62 in the first embodiment. Figure 4 As shown, the brush module 62 has a base 63 and a brush portion 64. The base 63 is a plate-shaped member that supports the brush portion 64. The brush portion 64 is composed of a plurality of linear bodies 65. A plurality of holes 63a are formed on one surface of the base 63 to which the base ends of the plurality of linear bodies 65 are mounted. The linear bodies 65 are planted in the plurality of holes 63a, respectively.

[0049] In the present embodiment, in the brush module 62, the base 63 is fixed to the fixing member 61, and the brush portion 64 protrudes from the fixing member 61. The plurality of linear bodies 65 are all of the same overall length and protrude from the base 63. Therefore, the protruding end of the brush portion 64 is a vertical plane that intersects the radial direction of the washing tank 12 at right angles as a whole.

[0050] For example, the linear body 65 is a bundle of hairs composed of a plurality of hairs 65a, but may be composed of a single hair 65a. The hairs 65a may have an elongated shape with a cross-sectional shape of, for example, a circle, an ellipse, an oblong, a polygon, or the like. For example, the hairs 65a are preferably composed of an elastic body. Specifically, the hairs 65a may be composed of a resin such as plastic or rubber, or a metal, or the like.

[0051] (About the operation of washing machine 1)

[0052] Next, an outline of the operation of washing machine 1 will be described.

[0053] (Washing of laundry 9)

[0054] The washing of the laundry 9 is performed in a state where the laundry 9 such as shoes is fixed to the support portion 14 and the detergent and water are stored in the washing tank 12. When the laundry 9 is washed, only the agitator 13 of the washing tank 12 is driven to rotate by the driving mechanism. As a result, the brush mechanism 6 rotates relative to the laundry 9 fixed to the support portion 14 provided on the agitator 13. As a result, the brush mechanism 6 contacts the laundry 9 and the laundry 9 is washed. In addition, when washing the laundry 9, as long as the washing tank 12 and the support portion 14 rotate relative to each other, the washing tank 12 may not rotate relative to the water tank 11, or it may rotate.

[0055] (Dehydration of laundry 9)

[0056] After washing the laundry 9, the laundry 9 is optionally dehydrated. Specifically, when washing the laundry 9 is finished, the detergent and water are discharged from the washing tank 12 through the water-repelling part and the drainage hole provided on the washing tank 12. Then, the agitator 13 and the washing tank 12 are integrally driven to rotate by the driving mechanism. As a result, the centrifugal force acts on the laundry 9 fixed on the support part 14 provided on the agitator 13, and the laundry 9 is dehydrated.

[0057] In addition, for example, when the laundry 9 is a shoe, it is preferable to fix the shoe to the support portion 14 so that the opening of the shoe faces radially outward. In this way, water in the shoe can be effectively discharged to the outside.

[0058] (Brush Module 62 of First Embodiment)

[0059] Figure 5 It is a schematic plan view of the washing tub 12 in which the laundry 9 is arranged in the first embodiment. Figure 5 The washing machine 1 shown in the example has four support parts 14. The four support parts 14 are arranged at equal intervals of 90° in the circumferential direction with the rotation center O of the washing tank 12 as the center. The laundry 9 can be fixed on each of the four support parts 14. The first brush module 621 and the second brush module 622 are symmetrically arranged in a manner of clamping a virtual vertical plane V passing through the rotation center O.

[0060] The brush mechanism 6 includes a fixing member 61 and a plurality of brush portions 64. The plurality of brush portions 64 protrude from the fixing member 61 and are arranged along the rotation direction of the agitator 13. Each of the plurality of brush portions 64 has a plurality of brush portions 64 extending along the axial direction AX (refer to Figure 2 In the present embodiment, the plurality of brushes 64 are the first brushes 641 of the first brush module 621 and the second brushes 642 of the second brush module 622. The axial direction AX is parallel to the upper and lower sides of the washing machine 1.

[0061] Each of the plurality of brush portions 64 extends from the fixing member 61 in a direction intersecting the axial direction AX. The plurality of brush portions 64 include a first brush portion 641 protruding from the fixing member 61 in a first direction D1 and a second brush portion 642 protruding from the fixing member 61 in a second direction D2 intersecting the first direction D1.

[0062] In the following description, the horizontal direction when looking radially outward from the rotation center O side of the washing tub 12 is referred to as the width direction. The first direction D1 is a direction from the width center of the base of the brush portion 641 toward the width center of the protruding end of the brush portion 641. The second direction D2 is a direction from the width center of the base of the brush portion 642 toward the width center of the protruding end of the brush portion 642.

[0063] In this embodiment, the first direction D1 and the second direction D2 are parallel to the horizontal direction perpendicularly intersecting the axial direction AX (up and down). However, since the first direction D1 and the second direction D2 are directions intersecting each other, the protruding direction of the first brush portion 641 and the protruding direction of the second brush portion 642 are not parallel to each other.

[0064] Each of the plurality of brushes 64 is configured to protrude from the fixed member 61 toward the inside of the washing tank 12. That is, both the first brush 641 and the second brush 642 protrude toward the inside of the washing tank 12 and reach the inside of the washing area 9a. The washing area 9a is an area where the objects 9 fixed to each fixed member 61 are moved when the fixed member 61 rotates together with the agitator 13. The washing area 9a is a circular shape slightly smaller than the washing tank 12, centered at the rotation center O in a plan view.

[0065] The first brush portion 641 and the second brush portion 642 are closer to each other as they move toward the inner side of the washing tub 12. In the present embodiment, the first direction D1 is inclined toward the same side as the second brush portion 642 compared to the radial direction D3. The radial direction D3 is a direction from the widthwise center of the base of the first brush portion 641 toward the rotation center O. Therefore, the first brush portion 641 protrudes toward between the rotation center O and the second brush portion 642.

[0066] The second direction D2 is inclined toward the same side as the first brush portion 641 compared to the radial direction D4. The radial direction D4 is a direction from the widthwise center of the base of the second brush portion 642 toward the rotation center O. Therefore, the second brush portion 642 protrudes toward between the rotation center O and the first brush portion 641. That is, the first brush portion 641 and the second brush portion 642 are inclined inwardly relative to each other in the radial direction toward the rotation center O.

[0067] (Washing Mode of First Embodiment)

[0068] Fig. 6A and Figure 6B 1 is a schematic top view of a portion of the washing tank 12, showing the contact state between the laundry 9 and the brush module 62 during washing in the first embodiment. During the washing operation of the washing machine 1, when the agitator 13 rotates counterclockwise in a top view, the laundry 9 also rotates counterclockwise around the rotation center O.

[0069] In this case, if Fig. 6A As shown, first, the laundry 9 contacts the second brush portion 642 and is scrubbed. Figure 6B As shown, the object 9 to be washed contacts the first brush portion 641 and is scrubbed. At this time, since the first brush portion 641 moves toward the upstream side of the rotation direction of the object 9 to be washed ( Figure 6BThe first brush portion 641 is inclined to the right side in the figure, so the contact angle α1 between the front end of the first brush portion 641 and the laundry 9 is relatively large. As a result, the laundry 9 is strongly beaten by the first brush portion 641, so α1 produces a so-called beating washing effect.

[0070] Although not shown, when the agitator 13 rotates counterclockwise in a plan view, the object 9 to be washed contacts the first brush portion 641 and the second brush portion 642 in that order. In this case, the object 9 to be washed contacts the first brush portion 641 and is scrubbed. Next, the object 9 to be washed contacts the second brush portion 642 and is scrubbed. At this time, the second brush portion 642 is directed toward the upstream side of the rotation direction of the object 9 ( Figure 6B The contact angle between the front end of the second brush portion 642 and the laundry 9 is the same as the contact angle α1 described above. Since the laundry 9 is strongly slapped by the second brush portion 642, a so-called slapping washing effect is produced.

[0071] Here, the washing mode in the comparative example is described. Fig. 7A and 7B 1 is a schematic top view of a portion of the washing tank 112, showing the contact state between the laundry 9 and the brush module 62 during washing in the comparative example. In the washing machine of the comparative example, the brush mechanism 106 provided in the washing tank 112 has two brush parts 164a and 164b. The two brush parts 164a and 164b are arranged along the rotation direction of the agitator 113 and extend in parallel toward the inner side of the washing tank 112.

[0072] like Fig. 7A As shown, during the washing operation of the washing machine according to the modified example, if the agitator 13 rotates counterclockwise in a plan view, the laundry 9 first contacts the brush portion 164a and is scrubbed. Figure 7B As shown, the object 9 to be washed contacts the brush portion 164b and is scrubbed. In this modification, the contact angle between the front end of the brush portion 164a and the object 9 to be washed and the contact angle between the front end of the brush portion 164b and the object 9 to be washed are both contact angles α11 that are smaller than the above-mentioned contact angle α1. Therefore, compared with the first embodiment, the present modification has a smaller effect of beating and cleaning the object 9 to be washed.

[0073] In addition, generally speaking, when scrubbing with a brush, it is effective to rub the front end of the brush against the object 9 to be washed. More specifically, it is better if the front end of the brush contacts the object 9 to be washed at an angle close to vertical (i.e., the contact angle α1 is large). In this modified example, if the object 9 to be washed is pushed toward the side of the brush, the front end is separated, and the contact angle α11 becomes relatively small, resulting in a decrease in the cleaning effect of scrubbing the object 9 to be washed. That is, according to the first embodiment described above, it is easy to exert the scrubbing effect on the object 9 to be washed.

[0074] In the following description, components having substantially the same functions as those of the first embodiment are denoted by the same reference numerals, and their description is omitted, and only the differences from the first embodiment are described.

[0075] (Second Embodiment)

[0076] A washing machine 1 according to a second embodiment of the present invention will be described. Figure 8 It is a schematic plan view of the washing tub 12 in which the laundry 9 is arranged in the second embodiment.

[0077] In the present embodiment, at least one of the plurality of brush portions 64 extends toward the inside of the washing tank 12 from a position closer to the rotation center O of the washing tank 12 than the inner circumferential surface 12a of the washing tank 12. Specifically, the fixing member 61 of the brush mechanism 6 includes a first member 61a and a second member 61b. The first member 61a is a member fixed to the inner circumferential surface 12a of the washing tank 12. The second member 61b is a member that can be attached and detached from the inside of the washing tank 12 relative to the first member 61a, and is equipped with brush modules 621 and 622.

[0078] By mounting the second component 61b on the first component 61a, the brush modules 621 and 622 are set on the fixed component 61. The second component 61b mounted on the first component 61a supports the brush modules 621 and 622 at a position closer to the rotation center O than the inner peripheral surface 12a. Therefore, the distance from the base 63 of each brush module 621 and 622 to the cleaning area 9a is shorter than the distance from the inner peripheral surface 12a to the cleaning area 9a. Therefore, the first brush part 641 and the second brush part 642 can protrude into the inside of the cleaning area 9a while suppressing their respective total lengths (i.e., the protruding length protruding from the base 63).

[0079] Generally speaking, the longer the total length of the brush portion 64 is, the easier it is for the brush portion 64 to bend, and the easier it is for the brush portion 64 to fall down in the rotation direction of the laundry 9 in contact during washing. As a result, since the scrubbing effect of the brush portion 64 is deteriorated, it is better not to make the total length of the brush portion 64 too large. In this regard, in the present embodiment, since the total length of the first brush portion 641 and the second brush portion 642 can be suppressed as described above, the deterioration of the scrubbing effect can be suppressed.

[0080] (Brush Module 62 of Second Embodiment)

[0081] like Figure 8As shown, the first brush module 621 and the second brush module 622 are symmetrically arranged with a virtual vertical plane V passing through the rotation center O. The difference between this embodiment and the first embodiment is that the first brush portion 641 and the second brush portion 642 are more isolated from each other as they move toward the inside of the washing tub 12 .

[0082] Specifically, the first direction D1 is inclined toward the side opposite to the second brush portion 642 compared to the radial direction D3, and is inclined toward the inner side of the washing tank 12 in a direction away from the vertical plane V. The second direction D2 is inclined toward the side opposite to the first brush portion 641 compared to the radial direction D4, and is inclined toward the inner side of the washing tank 12 in a direction away from the vertical plane V.

[0083] Figure 8 The washing machine 1 shown in the example is different from the first embodiment (see Figure 5 ) is the same as the support part 14, and has four support parts 14. When rotating during washing, the plurality of support parts 14 pass between the first brush part 641 and the second brush part 642 in a plan view. In the present embodiment, the gap area sandwiched between the first brush part 641 and the second brush part 642 has a size that can accommodate almost the entirety of the object 9 fixed to the support part 14. That is, the first brush part 641 and the second brush part 642 can contact almost the entirety of one object 9 from both sides of the rotation direction.

[0084] (Washing Mode of Second Embodiment)

[0085] Fig. 9 1 is a schematic top view of a portion of the washing tank 12, showing the contact state between the laundry 9 and the brush module 62 during washing in the second embodiment. During the washing operation of the washing machine 1, when the agitator 13 rotates counterclockwise in a top view, the laundry 9 also rotates counterclockwise around the rotation center O.

[0086] In this case, if Fig. 9 As shown, first, the object 9 to be washed contacts the second brush portion 642 and is scrubbed. At this time, since the second brush portion 642 moves toward the upstream side of the rotation direction of the object 9 ( Fig. 9 The second brush portion 642 is inclined to the right side of the figure, so the contact angle α2 between the front end of the second brush portion 642 and the object 9 to be washed is relatively large. The contact angle α2 is larger than that of the aforementioned comparative example (see Fig. 7A , 7B ) shown in the contact angle α11. Thus, since the laundry 9 is strongly slapped by the second brush portion 642, the so-called slapping and friction cleaning effects are produced. After that, the laundry 9 contacts the first brush portion 641 and is scrubbed.

[0087] Although not shown, when the agitator 13 rotates counterclockwise in a plan view, the laundry 9 contacts the first brush portion 641 and the second brush portion 642 in that order. In this case, the laundry 9 contacts the first brush portion 641 first and is scrubbed. At this time, the first brush portion 641 moves upstream in the direction of rotation of the laundry 9 ( Fig. 9 The first brush portion 641 is inclined to the left side in the figure, and the contact angle between the front end of the first brush portion 641 and the laundry 9 is the same as the contact angle α2 described above. Since the laundry 9 is strongly slapped by the first brush portion 641, the so-called slapping and friction washing effects are produced. After that, the laundry 9 contacts the second brush portion 642 and is scrubbed.

[0088] According to the present embodiment, the distance between the first brush portion 641 and the second brush portion 642 is the largest at the protruding ends of the brush portions 641 and 642. When washing the laundry 9, the first brush portion 641 and the second brush portion 642 are prevented from being tangled, mixed, or interfering with each other. Thus, when washing the laundry 9, it is possible to prevent the scrubbing force from being concentrated on only a portion of the laundry 9 or the laundry 9 from being scrubbed unevenly.

[0089] (Third Embodiment)

[0090] A washing machine 1 according to a third embodiment of the present invention will be described. Fig.10 1 and 2 are the front view and bottom view of the brush module 62 in the third embodiment. In addition, the front view of the brush module 62 is a view of the brush module 62 observed from the rotation center O side of the washing tank 12. Figure 8 , Fig. 9 ) are the same as those of the second embodiment, in that the first brush portion 641 and the second brush portion 642 are increasingly separated from each other as they move toward the inner side of the washing tub 12, but the following points are different from those of the second embodiment.

[0091] like Fig.10 As shown, the first brush portion 641 and the second brush portion 642 are provided across a predetermined vertical range of the washing tub 12. At least one of the first brush portion 641 and the second brush portion 642 is inclined relative to the vertical direction so as to be separated from each other downward.

[0092] In this embodiment, the first brush portion 641 extends to the lower left when viewed from the rotation center O side of the washing tub 12. The second brush portion 642 extends to the lower right when viewed from the rotation center O side of the washing tub 12. Therefore, the first brush portion 641 and the second brush portion 642 are both inclined relative to the vertical direction and move away from each other downward.

[0093] Fig.11 is a bottom view schematically showing a portion of the brush module 62 in the third embodiment. Specifically, Fig.11FIG. 6 is a bottom view of the first brush module 621 after being enlarged. Fig.11 As shown in the example, in the first brush portion 641 of the present embodiment, four rows of linear bodies 65 are arranged side by side along the rotation direction of the agitator 13. Each row of linear bodies 65 is composed of a plurality of rows of linear bodies 65 arranged in the vertical direction. Each linear body 65 extends from the base 63 along the first direction D1 (see FIG. 1 ) protruding from the fixing member 61 of the first brush portion 641. Fig.10 ) extends obliquely.

[0094] Although not shown, the second brush portion 642 of this embodiment is also the same as the first brush portion 641, and four rows of linear bodies 65 are arranged side by side along the rotation direction of the stirring body 13. Each linear body 65 extends from the base 63 along the second direction D2 (see FIG. 2 ) in which the second brush portion 642 protrudes from the fixing member 61. Fig.10 ) extends obliquely.

[0095] The inclination angle of the first brush portion 641 is the same from the upper end to the lower end of the first brush portion 641. Fig.11 , the widthwise length of the first brush module 621 is marked as widthwise length L1. The widthwise length L1 is greater than the widthwise length of the base 63. The inclination angle of the second brush portion 642 is the same from the upper end to the lower end of the second brush portion 642. The widthwise length of the second brush module 622 is also equal to the widthwise length L1.

[0096] like Fig.10 As shown, the interval between the first brush portion 641 and the second brush portion 642 is smallest at the upper end of each brush portion 641, 642. That is, in the upper part of the washing tank 12, since the distance between the first brush portion 641 and the second brush portion 642 is small, it is possible to achieve space saving of the brush area including each brush portion 641, 642. Therefore, the user can easily store the laundry 9 from the upper side of the washing tank 12 to the inside.

[0097] The interval between the first brush 641 and the second brush 642 is largest at the lower end of each brush 641, 642. That is, since the distance between the first brush 641 and the second brush 642 is large in the lower portion of the washing tub 12, it is easy to arrange the support portion 14 between the first brush 641 and the second brush 642.

[0098] The washing mode of this embodiment is the same as the washing mode of the second embodiment. In addition, when the laundry 9 is arranged between the first brush portion 641 and the second brush portion 642, the laundry 9 is scrubbed by the first brush portion 641 or the second brush portion 642 as the support portion 14 rotates. At this time, even if the laundry 9 is scrubbed by either the first brush portion 641 or the second brush portion 642, the laundry 9 is pushed downward, thereby preventing the laundry 9 from being washed from the support portion 14 upward.

[0099] During the washing process, the swirling water flow caused by the rotation of the agitator 13 is forced to switch due to the reverse rotation of the agitator 13, and the water surface fluctuates greatly up and down. Due to the buoyancy of the high water level and the upward water flow, the laundry 9 may sometimes be pulled out of the support 14. Fig.10 In the example of FIG. 1 , when the laundry 9 and the support portion 14 move from right to left, a force that causes the laundry 9 to escape upward acts on the outer side of the second brush portion 642 by contacting the brush surface that is inclined upward from the bottom. However, when passing through the second brush portion 642, the laundry 9 is prevented from escaping upward because the upper ends of the first brush portion 641 and the second brush portion 642 become narrower. Furthermore, a force that causes the laundry 9 to be pressed downward acts on the inner side surface of the first brush portion 641 by contacting the brush surface that is inclined upward from the bottom.

[0100] (Fourth Embodiment)

[0101] A washing machine 1 according to a fourth embodiment of the present invention will be described. Fig.12 4 is a front view and a bottom view of the brush module 62 in the fourth embodiment. Figure 8 , Fig. 9 ) are the same as those of the second embodiment, in that the first brush portion 641 and the second brush portion 642 are increasingly isolated from each other as they move toward the inner side of the washing tub 12, but the following points are different from those of the second embodiment.

[0102] like Fig.12 As shown, the first brush portion 641 and the second brush portion 642 are arranged across a predetermined vertical range of the washing tub 12. The protruding direction of at least one of the first brush portion 641 and the second brush portion 642 changes upward, so that the angle formed by the first direction D1 and the second direction D2, which is toward the inner side of the washing tub 12, becomes larger upward.

[0103] In this embodiment, the first brush portion 641 and the second brush portion 642 extend in the vertical direction when viewed from the rotation center O side of the washing tub 12. The more the protruding direction (i.e., the first direction D1) of the first brush portion 641 is upward, the more it inclines toward the side opposite to the second brush portion 642. The more the protruding direction (i.e., the second direction D2) of the second brush portion 642 is upward, the more it inclines toward the side opposite to the first brush portion 641.

[0104] Therefore, the more each brush portion 641, 642 is directed upward, the larger the inclination angle becomes. In addition, the inclination angle of the brush portion 64 is the angle of the brush portion 64 after being inclined based on the direction extending vertically from the fixing member 61 toward the inside of the washing tank 12. The larger the inclination angle of the brush portion 64 is, the more the brush portion 64 is inclined and falls down.

[0105] Among the angles formed by the first direction D1 and the second direction D2, the angle toward the inside of the washing tub 12 is referred to as a target angle. The target angle increases as it moves upwards from each brush portion 641, 642. Fig.12 The angle θ1 shown is the target angle at the lower end of each brush portion 641, 642. The target angle is minimum at angle θ1. The angle θ2 is the target angle at the upper end of each brush portion 641, 642. The target angle is maximum at angle θ2.

[0106] In addition, the first brush module 621 and the second brush module 622 are Fig.11 As in the example shown, a plurality of linear bodies 65 may be arranged on a base 63 to form the structure.

[0107] like Fig.12 As shown, the interval between the first brush portion 641 and the second brush portion 642 is smallest at the lower end of each brush portion 641, 642. That is, at the lower portion of the washing tub 12, since the distance between the first brush portion 641 and the second brush portion 642 is small, it is possible to achieve space saving of the brush area including each brush portion 641, 642. Therefore, it is easy to arrange a plurality of support portions 14 at the lower portion of the washing tub 12.

[0108] Furthermore, by changing the inclination angle of each brush portion 641, 642 in the vertical direction, a washing operation corresponding to the shape of the laundry 9 can be enabled. For example, the sports shoes as laundry 9 are fixed to the support portion 14 in a manner that the toes of the sports shoes face upward, and then washing is started.

[0109] In this case, the toe portion of the rotating sports shoe contacts the vicinity of the upper end of each brush portion 641, 642 to be scrubbed. Generally speaking, the thickness of the toe portion of the sports shoe is smaller than the thickness of the heel portion. Therefore, when the object 9 to be washed is a sports shoe, the movable space of each brush portion 641, 642 at the upper portion of the washing tank 12 is larger than the movable space of each brush portion 641, 642 at the lower portion of the washing tank 12. The vicinity of the upper end of each brush portion 641, 642 can be easily tilted outward by utilizing this movable space. By tilting the vicinity of the upper end of each brush portion 641, 642 outward by a large margin, the contact angle with the object 9 to be washed is relatively increased, and the toe portion of the sports shoe can be cleaned by so-called slapping cleaning and friction cleaning.

[0110] (Variation Example)

[0111] The present invention is not limited to the above-described embodiment, and may be replaced with a configuration that is substantially the same as the configuration shown in the above-described embodiment, a configuration that achieves the same function and effect, or a configuration that achieves the same purpose.

[0112] (1) As described above, the number of the supporting portions 14 included in the agitator 13 may be changed. Fig.13 It is a schematic plan view of a washing tub 12 in which laundry 9 is placed in a first modified example. Fig.13 The first modification shown has the same characteristics as the second embodiment (see Figure 8 ) has the same structure as the second embodiment, but is different from the second embodiment in that six support parts 14 are provided on the stirring body 13.

[0113] In this modified example, six support parts 14 are arranged at equal intervals of 60° in the circumferential direction around the rotation center O of the washing tank 12. By fixing the laundry 9 to all six support parts 14, a maximum of six laundry 9 can be accommodated in the washing tank 12. In the washing tank 12, since six laundry 9 are accommodated in a manner that adjacent laundry 9 are in contact with each other, the extra space in the washing tank 12 is suppressed.

[0114] In this modification, as in the second embodiment, the brushes 641 and 642 can contact substantially the entirety of one object 9 from both sides in the rotation direction. When the object 9 is between the brushes 641 and 642, the side surfaces of the brushes 641 and 642 contact the object 9. Furthermore, the protruding ends of the brushes 641 and 642 extend to the positions contacting the objects 9 on both sides of the object 9 between the brushes 641 and 642. Therefore, since the brushes 641 and 642 can clean two objects 9 at the same time, multiple objects 9 can be cleaned effectively.

[0115] (2) The protruding end of the brush portion 64 in the brush module 62 is not limited to the shape of a vertical surface perpendicular to the radial direction of the washing tub 12, and various shapes may be adopted. Fig.14 FIG. 6 is a top view of a brush module 62 in a second variant. Fig.14 In the example shown, inclined portions 64 a and 64 b are provided at the protruding ends of the brush portion 64 , and the distances of the inclined portions 64 a and 64 b from the rotation center O of the washing tub 12 gradually increase toward both ends in the rotation direction of the agitator 13 .

[0116] exist Fig.14 In the example shown, the laundry 9 rotates clockwise in the washing tank 12 along with the rotation of the agitator 13. In this case, the inclined portion 64a is located at the upstream side portion ( Fig.14 The total length of the plurality of linear bodies 65 constituting the inclined portion 64a gradually decreases as they move toward the upstream side in the rotation direction. As a result, the length of the inclined portion 64a protruding from the base 63 gradually decreases as it moves toward the upstream side in the rotation direction of the laundry 9.

[0117] In other words, the distance of the inclined portion 64a from the rotation center O toward the upstream side in the rotation direction of the agitator 13 ( Fig.14 The right side of the figure gradually increases. As a result, the laundry 9 moving toward the brush module 62 during washing first contacts the inclined portion 64a. Since the contact angle between the inclined portion 64a and the laundry 9 is small, the laundry 9 can contact the brush portion 64 smoothly. As a result, the laundry 9 can be scrubbed by the brush portion 64 while suppressing the impact on the laundry 9.

[0118] Although not shown, when the laundry 9 rotates counterclockwise in the washing tub 12, the inclined portion 64b is located at the upstream side portion ( Fig.14 The inclined portion 64b, like the inclined portion 64a, gradually decreases from the protruding length of the base 63 toward the upstream side of the rotation direction of the laundry 9. In other words, the distance of the inclined portion 64b from the rotation center O toward the upstream side of the rotation direction of the agitator 13 ( Fig.14 Thus, during washing, the laundry 9 moving toward the brush module 62 first contacts the inclined portion 64b, so that the laundry 9 can be scrubbed by the brush portion 64 while suppressing the impact on the laundry 9.

[0119] (3) The plurality of linear bodies 65 in the brush portion 64 of the brush module 62 may be disposed on the base 63 in various ways. Fig.15 1 is a bottom view schematically showing a portion of the brush module 62 in the third modified example. Fig.15 Shows Fig.11 A variation of the first brush module 621 is shown.

[0120] like Fig.15 As shown in FIG. 1 , the first brush portion 641 of this modified example includes a plurality of linear bodies 65 protruding from the fixing member 61. Specifically, Fig.11 Similarly, the first brush portion 641 is arranged in four rows along the rotation direction of the agitator 13 and is composed of a plurality of linear bodies 65 arranged in a plurality of rows in the vertical direction. However, the direction in which each linear body 65 extends from the base 63 changes along the rotation direction of the agitator 13.

[0121] In this modification, the plurality of linear bodies 65 include a first linear body and a second linear body adjacent to the first linear body on the downstream side of the rotation direction of the agitator 13. The first linear body protrudes in an inclined direction relative to the second linear body, so that the distance between the first linear body and the second linear body decreases toward the protruding direction of the first linear body.

[0122] Specifically, if the state in which the stirring body 13 rotates counterclockwise in a plan view is taken as a reference, the downstream side ( Fig.15 The smaller the inclination angle of each linear body 65 is, the smaller the inclination angle of each linear body 65 is. Among the plurality of linear bodies 65, the inclination angle of any first linear body is greater than the inclination angle of the second linear body adjacent to the downstream side of the first linear body. In other words, the first linear body is inclined relative to the corresponding second linear body.

[0123] Since the first linear body is more inclined than the second linear body, the distance between the first linear body and the second linear body decreases toward the protruding direction of each linear body 65, and thus the first linear body and the second linear body are closer to each other. Fig.15 As shown in the example, the first brush portion 641 is generally moved along the first direction D1 (see Figure 8 ) is extended, but the protruding ends of the plurality of linear bodies 65 are in a dense state. Among the plurality of linear bodies 65, the second linear body in contact with the first linear body is pressed by the first linear body and bent or curved.

[0124] exist Fig.15 , the width length of the first brush module 621 is marked as width length L2. Although not shown, the width length of the second brush module 622 is also equal to the width length L2. The width L2 is greater than the width length of the base 63. However, due to the above structure, the width length L2 is less than Fig.11 Therefore, according to the present modification, when the brush portion 64 of the brush module 62 is tilted, the length in the width direction of the brush module 62 can be suppressed, thereby achieving space saving of the brush module 62.

[0125] (4) The brush mechanism 6 is not limited to having two brush modules 62, and may have three or more brush modules 62. For example, a third brush module may be provided between the first brush module 621 and the second brush module 622, protruding from the fixing member 61 toward the rotation center O of the washing tub 12. In this case, the protruding length of the third brush module may be smaller than the protruding length of each brush module 621, 622.

[0126] (5) In the brush module 62, the protruding length of the brush portion 64 (specifically, the total length of the plurality of linear bodies 65) may not be constant. The protruding length of the brush portion 64 may be different depending on the location. For example, the protruding length of the brush portion 64 may change in a wave shape or a sawtooth shape along the vertical direction. The protruding length of the upper portion of the brush portion 64 and the protruding length of the lower portion of the brush portion 64 may be different.

[0127] (6) In the above-mentioned embodiment and modification, a method of using a brush mechanism 6 protruding from the outside to the inside of the cleaning area 9a to clean the object 9 rotating in the washing tank 12 is exemplified, but the present invention is not limited to this. For example, a central axis extending along the axial direction AX can be provided in the washing tank 12, and a brush mechanism 6 protruding outward from the central axis can be provided. In this case, the object 9 rotating in the washing tank 12 can be cleaned by the brush mechanism 6 fixed to the central axis. Alternatively, by rotating the central axis in the washing tank 12, the object 9 fixed around the central axis can be cleaned by the brush mechanism 6 rotating together with the central axis. The first brush portion 641 and the second brush portion 642 are not limited to a symmetrical shape with a vertical plane V sandwiched therebetween, but may also be an asymmetrical shape with a vertical plane V sandwiched therebetween.

[0128] (Remark)

[0129] The washing machine 1 of the present disclosure includes a washing tank 12 for storing laundry 9, an agitator 13 disposed at the bottom of the washing tank 12 and rotating, and a brush mechanism 6 disposed inside the washing tank 12. The brush mechanism 6 includes a fixed component 61 and a plurality of brush portions 64. The plurality of brush portions 64 protrude from the fixed component 61 and are arranged along the rotation direction of the agitator 13. Each of the plurality of brush portions 64 has an outer shape extending along the axial direction AX of the agitator 13, and extends from the fixed component 61 in a direction intersecting the axial direction AX. The plurality of brush portions 64 include a first brush portion 641 protruding from the fixed component 61 in a first direction D1 and a second brush portion 642 protruding from the fixed component 61 in a second direction D2 intersecting the first direction D1.

[0130] According to the washing machine 1, the contact angle between the laundry 9 rotating during washing and at least one of the first brush portion 641 and the second brush portion 642 becomes relatively large. Therefore, when the laundry 9 contacts the first brush portion 641 or the second brush portion 642, the laundry 9 is easily beaten and cleaned, which can improve the cleaning effect of the laundry 9.

[0131] The fixing member 61 may be disposed on the inner circumferential surface 12a of the washing tank 12. Each of the plurality of brushes 64 may be configured to protrude from the fixing member 61 toward the inner side of the washing tank 12. Accordingly, due to the centrifugal force caused by the rotation during washing, the laundry 9 is pushed radially outward by the plurality of brushes 64 in the washing tank 12. Therefore, the plurality of brushes 64 disposed on the inner circumferential surface 12a of the washing tank 12 can reliably contact the rotating laundry 9 and wash it.

[0132] The first brush 641 and the second brush 642 can be isolated from each other as they move toward the inside of the washing tub 12. Thus, when washing the laundry 9, it is easy to produce the effect of scrubbing and beating the laundry 9, and the first brush 641 and the second brush 642 can be prevented from interfering with each other.

[0133] The first brush portion 641 and the second brush portion 642 may be disposed within a specified vertical range of the washing tub 12. At least one of the first brush portion 641 and the second brush portion 642 may be tilted relative to the vertical direction so that the two brush portions move downward away from each other. Accordingly, the user may easily accommodate the laundry 9 in the washing tub 12 from above.

[0134] The first brush portion 641 and the second brush portion 642 may be disposed in a predetermined vertical range of the washing tub 12. The protruding direction of at least one of the first brush portion 641 and the second brush portion 642 may change upward, so that the angle formed by the first direction D1 and the second direction D2, which faces the inner side of the washing tub 12, becomes larger upward. Accordingly, the upper portion of the laundry 9 can be cleaned more reliably.

[0135] At least one of the plurality of brushes 64 may extend toward the inside of washing tub 12 from a position closer to the rotation center O of washing tub 12 than inner circumferential surface 12a of washing tub 12. This can reduce the overall length of brush 64, thereby reducing the reduction in scrubbing effect.

[0136] At least one of the plurality of brushes 64 may be provided with inclined portions 64a and 64b at the protruding end of the brush portion 64 protruding toward the inner side of the washing tank 12, and the distance of the inclined portions 64a and 64b from the rotation center O of the washing tank 12 gradually increases toward both ends of the rotation direction of the agitator 13. Accordingly, the brush portion 64 can rub the washed object 9 while suppressing the impact on the washed object 9.

[0137] The fixing member 61 can be detachably mounted on the plurality of brush portions 64. This makes it relatively easy to replace the deteriorated or damaged brush portion 64.

[0138] At least one of the plurality of brush portions 64 may include a plurality of linear bodies 65 protruding from the fixed member 61. The plurality of linear bodies 65 may include a first linear body and a second linear body adjacent to the first linear body on the downstream side of the rotation direction of the agitator 13. The first linear body may protrude in an inclined direction relative to the second linear body, so that the distance between the first linear body and the second linear body becomes smaller toward the protruding direction of the first linear body. Accordingly, space saving of the brush mechanism 6 can be achieved.

[0139] The first brush portion 641 and the second brush portion 642 may be closer to each other as they move toward the inner side of the washing tub 12. Thus, when washing the laundry 9, the laundry 9 can be easily scrubbed and beaten for cleaning.

[0140] The washing machine 1 may include a support portion 14 for fixing the shoes as the laundry 9 inside the washing tub 12. According to this, the shoes as the laundry 9 can be reliably cleaned by beating and washing using the plurality of brush portions 64.

Claims

1. A washing machine, characterized in that: have: A washing sink that can store the laundry; a stirring body arranged at the bottom of the washing tank and rotating, and A brush mechanism is arranged inside the washing tank, The brush mechanism comprises: Fixed parts; and A plurality of brush portions protruding from the fixing member and arranged along the rotation direction of the stirring body, Each of the plurality of brush portions has an outer shape extending along the axial direction of the agitator and extends from the fixing member in a direction intersecting the axial direction. The plurality of brush portions include a first brush portion protruding from the fixing member in a first direction and a second brush portion protruding from the fixing member in a second direction intersecting the first direction; The fixing member is disposed on the inner peripheral surface of the cylindrical washing tank. The first brush portion protrudes from the fixing member toward an inner side of the washing tub, and the first direction is inclined with respect to a radial direction of the washing tub.

2. The washing machine according to claim 1, characterized in that: The washing tank is provided with a support portion for fixing shoes as the washing object. The second brush portion protrudes from the fixing member toward the inside of the washing tank, and the second direction is inclined relative to the radial direction of the washing tank; When the shoes fixed to the support portion move between the rotation center of the washing tub and the fixing member, both the first brush portion and the second brush portion come into contact with the shoes.

3. The washing machine according to claim 1 or 2, characterized in that: The first brush portion and the second brush portion are spaced apart from each other as they move toward an inner side of the washing tub.

4. The washing machine according to claim 3, characterized in that: The first brush portion and the second brush portion are disposed in a predetermined vertical range of the washing tub, and at least one of the first brush portion and the second brush portion is inclined with respect to the vertical direction so as to be separated from each other downward.

5. The washing machine according to claim 3, characterized in that: The first brush portion and the second brush portion are disposed in a specified vertical range of the washing tank, and a protruding direction of at least one of the first brush portion and the second brush portion changes upward, so that among the angles formed by the first direction and the second direction, the angle facing the inner side of the washing tank becomes larger upward.

6. The washing machine according to claim 1 or 2, characterized in that: At least one of the plurality of brushes extends toward the inside of the washing tub from a position closer to a rotation center of the washing tub than to an inner peripheral surface of the washing tub.

7. The washing machine according to claim 1 or 2, characterized in that: At least one of the plurality of brush parts has an inclined part at a protruding end of the brush part protruding toward the inside of the washing tub, and a distance of the inclined part from a rotation center of the washing tub gradually increases toward both ends in the rotation direction.

8. The washing machine according to claim 1 or 2, characterized in that: The fixing member is capable of attaching and detaching the plurality of brush parts.

9. The washing machine according to claim 1 or 2, characterized in that: At least one of the multiple brush portions includes the multiple linear bodies protruding from the fixed part, the multiple linear bodies include a first linear body and a second linear body adjacent to the first linear body on the downstream side of the rotation direction, the first linear body protrudes in a direction inclined relative to the second linear body, so that the distance between the first linear body and the second linear body becomes smaller toward the protruding direction of the first linear body.

10. The washing machine according to claim 1 or 2, characterized in that: The first brush portion and the second brush portion are closer to each other as they move toward an inner side of the washing tub.

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