Washing machine

Abstract

To provide a washing machine capable of reducing washing unevenness.SOLUTION: A washing machine includes: a washing tub disposed in an outer tub; and an agitation vane 3 rotatably provided at a bottom part of the washing tub. The agitation vane 3 includes a protrusion part 33 protruding in the center part, and a plurality of vane parts 35 protruding upward and extending radially in the radial direction around the protrusion part 33, on a base 31. At an upper edge of each of the plurality of vane parts 35, a flat surface 351a is provided extending from an end on the center side in the radial direction, in the direction toward the outside from the center side in the radial direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a washing machine equipped with an agitating blade. [Background technology]

[0002] Conventionally, a washing machine has been known that includes a pulsator (agitating blade) that is rotatably arranged in a water tub, the pulsator including a central convex portion 31 and a plurality of blade portions 32 that are arranged radially around the central convex portion 31 (Patent Document 1). When the pulsator rotates, the laundry is pushed up by the blades 32, which promotes the exchange of the upper and lower laundry items and reduces uneven washing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-185134 Summary of the Invention [Problem to be solved by the invention]

[0004] In the washing machine described above, the upper edge of the blade portion is inclined downward from the radial outside toward the center, which leaves room for improvement in that the effectiveness of the laundry shifting described above is reduced. The present invention provides a washing machine capable of reducing uneven washing. [Means for solving the problem]

[0005] The washing machine of the present invention comprises a washing tub disposed within an outer tub and an agitator blade rotatably mounted on the bottom of the washing tub, the agitator blade having a base including a protruding portion at the center and a plurality of blade portions that protrude upward and extend radially in a radial direction centered on the protruding portion, and the upper edge of each of the plurality of blade portions has a flat surface that extends from the end closest to the center in the radial direction in a direction from the center toward the outside in the radial direction. [Effects of the Invention]

[0006] According to the above configuration, uneven washing can be reduced. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a schematic perspective view of a washing machine according to an embodiment; [Figure 2] FIG. 2 is an enlarged perspective view of the bottom of the washing tub. [Figure 3] 1A and 1B are perspective views of an agitating impeller, where (a) is a view from above and (b) is a view from below. [Figure 4] (a) is an enlarged side view of the stirring blade, (b) is a cross-sectional view of the AA section of (a) viewed from the arrow side, and (c) is a cross-sectional view of the BB section of (a) viewed from the arrow side. [Figure 5] (a) is an enlarged side view of the impeller, and (b) is an enlarged top view of the impeller. [Figure 6] 10A and 10B are diagrams showing a modified manual insertion unit, in which (a) is a perspective view seen from above on the rear side, and (b) is a cross-sectional view perpendicular to the left-right direction. [Figure 7] FIG. 10 is a perspective view of the manual insertion unit of the modified example in an exploded state, as viewed from above on the front side. [Figure 8] FIG. 10 is a perspective view of a water injection unit and a manual insertion unit of a modified example, viewed from below on the front side.

[0008] <Summary> A first washing machine according to one embodiment of the present invention comprises a washing tub disposed within an outer tub and an agitator blade rotatably mounted on the bottom of the washing tub, the agitator blade having a base including a protruding central portion and a plurality of blade portions that protrude upward and extend radially in a radial direction from the protruding central portion, the upper edge of each of the plurality of blade portions having a flat surface that extends from the end closest to the center in the radial direction in a direction from the center toward the outside in the radial direction. This can reduce uneven washing.

[0009] A second washing machine according to one embodiment of the present invention is configured such that, in the first washing machine, the radially central end of the wing portion is the proximal end, and the radially outer end is the distal end, and the range in which each of the plurality of wing portions has the flat surface is within the range between the position where the radial length of the base is 1 / 3 of the radius of the base and the proximal end, based on the center of rotation of the base. This can reduce uneven washing.

[0010] A third washing machine according to one embodiment of the present invention is the first or second washing machine, wherein the radially central end of each of the blades is the proximal end and the radially outer end is the distal end, and each of the plurality of blades has a shape in which the distal end side bends in the rotation direction of the agitator blade, starting from an inflection point, and the inflection point is within a range between a position where the radial length of the base is 1 / 2 the radius of the base and a position where the radial length is 2 / 3 the radius of the base, based on the center of rotation of the base. This improves the performance of peeling and loosening laundry.

[0011] A fourth washing machine according to one embodiment of the present invention is characterized in that, in the first to third washing machines, the imaginary line connecting the inflection point and the distal end is inclined 15 to 35 degrees in the rotation direction relative to the imaginary line connecting the proximal end and the inflection point. This improves the performance of peeling and loosening laundry.

[0012] A fifth washing machine according to one aspect of the present invention is a washing machine according to any one of the first to fourth washing machines, wherein the bending shape of each of the plurality of wing portions is a shape bending to one side of the rotation direction around the rotation center of the agitator impeller, each of the plurality of wing portions has a first inclined surface on one side of the rotation direction and a second inclined surface on the other side of the rotation direction, and a first angle of the first inclined surface relative to the horizontal is greater than a second angle of the second inclined surface relative to the horizontal. This results in a different load acting on the laundry (a load pushing it up), improving the laundry agitation performance.

[0013] A sixth washing machine according to one aspect of the present invention is any one of the first to fifth washing machines, wherein the upper edge of each of the plurality of wing portions is inclined so as to be lower than the flat surface on the outer side of the flat surface in the radial direction. This makes it easier to move the laundry.

[0014] A seventh washing machine according to one aspect of the present invention is a washing machine according to any one of the first to sixth washing machines, wherein the plurality of wing portions include a first wing portion and a second wing portion, and the first flat surface as the flat surface of the first wing portion and the second flat surface as the flat surface of the second wing portion are in the same plane. This can reduce damage to the clothing.

[0015] An eighth washing machine according to one aspect of the present invention is any of the first to seventh washing machines, wherein the flat surface and the upper surface of the convex portion are flush with each other. This can reduce damage to the clothing.

[0016] A ninth washing machine according to one aspect of the present invention is any one of the first to eighth washing machines, wherein each of the plurality of wing portions has a narrower width in the rotation direction at the flat surface than at the bottom side. This makes it easier to move the laundry.

[0017] <Embodiment> 1. Overview As shown in FIG. 1, the washing machine 1 is a vertical type. As shown in FIGS. 1 and 2, washing machine 1 includes outer tub 11, washing tub 12 disposed within outer tub 11, and agitator blade 3 rotatably provided on bottom 121 of washing tub 12. Washing machine 1 is provided with, in housing 10, a drive unit 13 that selectively drives and rotates washing tub 12 and agitator blade 3, an operation unit 14 for inputting and selecting a washing process operation course, a display unit 15 for displaying the operating status of the washing process, a water supply unit 16 for supplying water to washing tub 12, a drain unit for draining water from washing tub 12, a treatment agent dispenser 17 for dispensing laundry treatment agents such as detergent and fabric softener into washing tub 12, a control unit that controls drive unit 13 etc. to perform the washing process, and a power supply unit for supplying power to drive means such as drive unit 13 and control unit. The washing machine 1 is a vertical type (vertical washing machine), and the central axis (also called the "rotation axis") of the washing tub 12 extends in the up-down direction (vertical direction) or is inclined at a predetermined angle, for example, an angle of 10 degrees or less, relative to the up-down direction. The drive unit 13 includes a clutch 131 and a motor 133 . The processing agent dispenser 17 includes an automatic dispenser 17A and a manual dispenser 17B. The automatic dispenser 17A is provided on the rear side of the inner peripheral wall 10b that forms the opening of the top cover 10a of the housing 10. The manual dispenser 17B is provided on the top cover 10a around the opening.

[0018] 2. Mixing blade The agitating blade 3 is a so-called pulsator, and has a disk shape as a whole, as shown in Fig. 2. The agitating blade 3 has a protruding portion 33 protruding from the center, and a plurality of (for example, four) blade portions 35 on a base 31, which protrude upward and extend radially in the radial direction from the protruding portion 33 as the center. The following description will be given mainly with reference to FIGS.

[0019] (1) Foundation The base 31 has a main body 310 whose outer periphery is circular when viewed in the direction in which the rotation axis extends (also referred to as the "rotation axis direction"). The base 31 is supported by a drive shaft so that its center becomes the rotation axis. The center of the base 31 also becomes the rotation center. The main body 310 bulges downward from the base of the central protrusion 33 toward the outside in the radial direction, becoming lower midway. The main body 310 is a rotating body that rotates around a rotation axis. When cut along a plane including the rotation axis (longitudinal cross section), the main body 310 has a curved shape that is convex downward from the rotation axis to the outer periphery. That is, in the radial direction, the main body 310 has a downwardly inclined portion 311 formed on the protrusion 33 side and inclined downward, and an upwardly inclined portion 312 formed on the outer periphery and inclined upward. The main body 310 has multiple through holes 313 that penetrate vertically between the downwardly inclined portion 311 and the upwardly inclined portion 312. This allows wash water to move between the front and back of the agitator impeller 3, improving washing performance. The main body 310 may have a horizontal portion 314 between the downwardly inclined portion 311 and the upwardly inclined portion 312. The horizontal portion 314 can also be said to be the apex or bottom of a downwardly convex curve. The base 31 has a bent portion 315 extending downward from the outer periphery, that is, the outer periphery of the main body 310 (upwardly inclined portion 312). The back side of the base 31 has a plurality of circumferential ribs 316 formed concentrically at intervals from the center outward in the radial direction, radial ribs 317 extending to radially connect the plurality of circumferential ribs 316, and radial ribs 318 extending radially outward from the outermost circumferential rib 316. This reinforces the base 31.

[0020] (2) Convex part The convex portion 33 has the shape of a body of revolution rotated around a rotation axis passing through the center of the base 31. The convex portion 33 has a shape like a cone with a missing apex (frustoconical shape). The apex of the convex portion 33 is configured to have a gentler (smaller) inclination angle than the base side. The upper surface of the convex portion 33 is flat. The upper surface of the convex portion 33 is formed so as to be perpendicular to the rotation axis. For convenience, the boundary between the convex portion 33 and the base 31 (the base of the convex portion 33) is set at a position where the inclination angle of the outer periphery of the upward protruding portion is 45° with respect to the horizontal direction, or at the same height as the upper end of the outer periphery of the base 31.

[0021] (3) Wings The blades 35 protrude upward from the base 31. The four blades 35 are provided at equal intervals (equal angles) in the circumferential direction. The circumferential direction is also the rotation direction of the agitating blade 3 (forward and reverse rotations possible). The wings 35 protrude from the base 31 so that their circumferential width narrows upward. In other words, the circumferential width of the wings 35 narrows gradually (including in a stepwise, flat, or curved manner) from the bottom side (base 31 side) to the top end (upper surface). Note that the "circumferential width" of the wings 35 refers to the dimension in the circumferential direction. This makes it easier for laundry to climb over the wings 35. When one wing portion 35 is viewed from above (FIG. 5(b)), the wing portion 35 has a shape that curves to one side in the circumferential direction. 4(b) and (c), in a cross section perpendicular to the radial direction, the wing portion 35 has a trapezoidal or trapezoidal shape, like a triangle with a missing apex, and has an upper portion 351, a first inclined portion 352, and a second inclined portion 353. The portion surrounded by the upper portion 351, the first inclined portion 352, and the second inclined portion 353 is hollow. The height of the upper portion 351 of the wing portion 35 gradually decreases toward the outer periphery, and then the height suddenly decreases near the outer periphery edge where the wing portion 35 connects with the base 31. This suddenly decreasing end portion 351c is also included in the upper portion 351. Note that the end portion 351c of the upper portion 351 may be considered an end portion instead of the upper portion 351. The first inclined portion 352 is located on the side where the wing portion 35 curves, that is, on one side in the circumferential direction, and the second inclined portion 353 is located on the other side in the circumferential direction. As shown in FIG. 5, the radially central end of the wing portion 35 is defined as a proximal end 35a, and the radially outer end is defined as a distal end 35b.

[0022] (3-1) Upper part The upper edges of the wings 35, i.e., the upper portions 351, are flat. The upper portions 351 have flat surfaces 351a that extend from the proximal ends 35a or near the proximal ends 35a in a radial direction from the center toward the outside. The flat surfaces 351a can reduce damage to clothing. Upper portion 351 has inclined surface 351b radially outward from flat surface 351a. Upper portion 351 here has flat surface 351a and inclined surface 351b continuously from proximal end 35a to distal end 35b.

[0023] As shown in Fig. 5(b), the flat surface 351a is in the range between position A and the proximal end 35a. Position A is a position where the radial length with respect to the center of the base 31 is 1 / 3 of the radius of the base 31 ("R" in Fig. 5(a)). Here, the flat surface 351a is located in the entire region between position A and the proximal end 35a. The flat surface 351a may be located radially outward from position A, and is located in the entire range between the position where the radial length from the center of the base 31 is 3 / 5 of the radius of the base 31 and the proximal end 35a. As shown in Fig. 4(b), the flat surface 351a is a surface inclined at an angle of 5° or less relative to the horizontal plane or the horizontal direction. As shown in Figs. 3(a) and 5(a), the flat surface 351a is flush with the upper surface of the protrusion 33. This prevents laundry from getting caught on the proximal end 35a of the wing 35 or the protrusion 33. The flat surfaces of the wings 35 are arranged to lie on the same plane. Specifically, as shown in Fig. 2, for example, a first flat surface 351Aa, which is the flat surface of the first wing 35A, and a second flat surface 351Ba, which is the flat surface of the second wing 35B, lie on the same plane. Note that the letters "first," "second," "A," and "B" are used for the sake of convenience.

[0024] The inclined surface 351b is inclined so that the height gradually decreases as it moves radially outward. As shown in FIG. 4(c), the inclined surface 351b is inclined in the circumferential direction so that one side in the circumferential direction becomes lower as it moves radially outward. This allows the laundry to smoothly move over the blade portion 35 when the agitating blade 3 rotates toward one side in the circumferential direction. As shown in FIG. 5(b), end portion 351c is located in the range between positions F and G in the radial direction when viewed from above. Position F is the edge of end portion 351c on the center side, passing through the circumferential center and perpendicular to virtual line L1. Position G is the edge of end portion 351c on the distal end 35b side, passing through the circumferential center and perpendicular to virtual line L1. Furthermore, virtual line L1 is a virtual line passing through the circumferential center of flat surface 351a when upper portion 351 is viewed from above. Position F is a position where the radial length from the center of base 31 is within a range of 13 / 20 to 17 / 20 of the radius R of base 31. This allows for a reduction in the amount of laundry passing between washing tub 12 and agitator blade 3. The height from the outer periphery of the main body 310 at position F is within the range of 13 / 20 to 17 / 20 of the height from the outer periphery of the main body 310 to the flat surface 351a ("H" in FIG. 5(a)).

[0025] (3-2) Inclined part As shown in FIGS. 4(a) and 4(b), the first inclined portion 352 and the second inclined portion 353 are inclined in a linear or nearly linear manner in cross section. Here, the surface of first inclined portion 352 positioned inside washing tub 12 is referred to as first inclined surface 352a, and the surface of second inclined portion 353 positioned inside washing tub 12 is referred to as second inclined surface 353a. The angle of the first inclined surface 352a with respect to the horizontal direction (first angle, "θ1" in FIGS. 4(b) and 4(c)) is configured to be larger than the angle of the second inclined surface 353a with respect to the horizontal direction (second angle, "θ2" in FIGS. 4(b) and 4(c)). This causes the load acting on the laundry (the upward pushing load) to differ when the agitating blade 3 rotates in one circumferential direction (first rotation direction) from when it rotates in the other circumferential direction (second rotation direction), thereby improving the agitation performance of the laundry. On the flat surface 351a, the first angle θ1 is in the range of 60 to 80°, preferably in the range of 65 to 75°, and the second angle θ2 is in the range of 50 to 70°, preferably in the range of 55 to 65°.

[0026] (3-3) Planar view shape When viewed from above, as shown in FIG. 5(b), the blade portion 35 has a curved portion 355 that curves toward one side in the circumferential direction from a midpoint inflection in the radial direction, with the proximal end 35a as the reference. This allows the curved portion (first inclined portion 352) to more easily move laundry toward the inside in the radial direction (toward the rotation axis) when the agitator impeller 3 rotates in a first rotation direction on one side of the circumferential direction, and the curved portion (second inclined portion 353) to more easily move laundry toward the outside in the radial direction (away from the rotation axis) when the agitator impeller 3 rotates in a second rotation direction on the other side. Therefore, by repeatedly rotating the agitator impeller 3 forward and backward, the ability to peel and loosen laundry can be improved. Furthermore, the amount of laundry moved can be increased, improving washing performance. The inflection position E is in the range between position B where the radial length is 1 / 2 of the radius R of the base 31 and position C where the radial length is 2 / 3 of the radius R of the base 31, with the center of the base 31 as the reference point. The curved portion 355 of the wing 35 has an angle θ3 between an imaginary line L2 connecting the center of width J at the distal end 35b of the upper portion 351 of the wing 35 and the inflection point E, and an imaginary line L1 passing through the center of width of the flat surface 351a of the upper portion 351, which is in the range of 15 to 35°.

[0027] <Modification> Although the embodiment has been described, the present invention is not limited to this embodiment, and the following modified examples may be used, for example. Furthermore, the embodiment and the modified examples may be combined, or the modified examples may be combined. Furthermore, examples not described in the embodiments and modifications, and design changes within the scope of the present invention are also included in the present invention.

[0028] 1. Mixing blade (1) Foundation Although the base 31 has the inclined portion 311, it may be configured with a horizontal portion 314 without the inclined portion 311. Although the base 31 has the inclined portion 312, it may be configured with a horizontal portion 314 without the inclined portion 312. Although the base 31 has the horizontal portion 314 between the inclined portion 311 on the inner periphery side and the inclined portion 312 on the outer periphery side, it may not have a horizontal portion. Although the base 31 has the inclined portions 311 and 312, it may be configured with a horizontal portion 314 without these portions. The base 31 is recessed downward from the center to the periphery, but may be protruded upward. The horizontal portion 314 does not have through holes 313, but may have through holes.

[0029] (2) Convex part Although the convex portion 33 has a flat upper surface, it may have an arc or dome shape, for example, and may not have a flat surface. Although the convex portion 33 has a circular external shape when viewed from above, it may have a polygonal shape (including cases where the corners are arc-shaped). The upper surface of the convex portion 33 and the flat surface 351a of the wing portion 35 were on the same plane (flush), but for example, the upper surface of the convex portion 33 may be located above or below the flat surface 351a.

[0030] (3) Wings Although four wing portions 35 are formed in the above embodiment, the number may be one to three, or five or more. Although the multiple (four) wing portions 35 are formed at equal intervals (equal angles) in the circumferential direction, the multiple (four) wing portions may be formed at different intervals (angles) in the circumferential direction. The flat surface 351a is on the same plane, but it may be a surface that is uneven on the top and bottom, or may be a linear or curved inclined surface in the circumferential direction (for example, inclined surface 351b), or may be a linear or curved inclined surface in the radial direction (for example, inclined surface 351b). The wing portion 35 may or may not have through holes for the wash water. The inflection points (E) of the curved portions 355 of all the wings 35 may be the same or different. The curved directions of the curved portions 355 may be the same or different. The curved angles of the curved portions 355 (the angle θ3 between the imaginary lines L1 and L2 in FIG. 5(b)) may be the same or different. The first angle of the first inclined portion 352 and the second angle of the second inclined portion 353 of the wing portion 35 may be the same or different. The first inclined portion 352 may be inclined in a plane (surface) or in a curved surface that is convex upward or downward. The second inclined portion 353 may be inclined in a plane (surface) or in a curved surface that is convex upward or downward.

[0031] 2.Manual input section Although the manual insertion section 17B is provided around the opening of the upper cover 10a, it may be provided on the inner peripheral wall 10b, similar to the automatic insertion section 17A. The manual insertion portion 17C provided on the inner peripheral wall 10b will be described below with reference to FIGS. The manual insertion section 17C includes a first storage section 172 and a second storage section 173 in a manual insertion case 171 that is provided so as to be able to be pulled out from the inner circumferential wall 10b. When the manual insertion section 17C is housed in the inner peripheral wall 10b, water is supplied to the first storage section 172 and the second storage section 173 from the water injection hole 161 of the water injection section 16C of the upper water injection device, as shown in FIG. The manual insertion case 171 has a stopper 171a that prevents the manual insertion case 171 from slipping out forward due to vibrations caused by the washing machine when the case is housed in the inner peripheral wall 10b. The stopper 171a is located at the front of the manual insertion case 171 in the insertion / removal direction (front-rear direction).

[0032] First storage section 172 is configured as a recess formed in manual insertion case 171, and mainly stores a powdered treatment agent (for example, powdered detergent). The recessed portion has a first opening 172a for pouring the stored treatment agent into the washing tub 12 together with water supplied from above.

[0033] Second reservoir 173 is configured by a recess formed in manual throw-in case 171, and mainly stores liquid treatment agent (for example, fabric softener). The second storage section 173 and the first storage section 172 are arranged side by side in a direction (left and right direction) perpendicular to the insertion and removal direction (front and back direction) of the manual insertion case 171. Second storage section 173 uses a siphon to dispense the stored treatment agent into washing tub 12. That is, second storage section 173 includes first opening 173c (see FIG. 8) formed in the recessed portion of manual insertion case 171, tubular portion 173a extending upward from the periphery of first opening 173c, and second cap 174 that covers the tubular portion. Second cap 174 has engaging portion 174a that engages with rear wall portion 173b of the recessed portion for second storage section 173 of manual insertion case 171.

[0034] The manual insertion section 17C includes a first storage section 172 and a third storage section 175. Third storage section 175 is configured by a third case 176 that is placed in a recessed portion for first storage section 172. Third case 176 is box-shaped with an open top, and is provided on first storage section 172 so as to be removable from above. That is, when supplying the treatment agent to first reservoir 172, third reservoir 175 is removed, and when supplying the treatment agent to third reservoir 175, third reservoir 175 is left attached to first reservoir 172. This makes it possible to provide at least three reservoirs (it is also possible to provide a fourth reservoir for the second reservoir) in a space-saving manner. Third case 176 is attached to first storage portion 172 at a vertical distance from bottom wall portion 172b of first storage portion 172. That is, third case 176 has engaging portions 176a and 176b that engage with engaging portions 172c and 172d of first storage portion 172. Third reservoir 175 uses a siphon to dispense the stored treatment agent into washing tub 12. That is, third reservoir 175 includes third opening 176d formed in bottom 176c of third case 176, tubular portion 176e extending upward from the periphery of third opening 176d, and third cap 177 that is fitted over tubular portion 176e. Third cap 177 has engaging portion 177a that engages with sidewall portion 176f of third case 176. The third storage section 175 has an overflow port 176g in the third case 176 for allowing water supplied from above to flow out toward the first storage section 172 when the water exceeds the third cap 177. The flow path through which the water supplied to the third case 176 flows toward the first storage section 172 is shown by an arrow in FIG. 6(b). [Explanation of symbols]

[0035] 1 washing machine 3 Mixing blades 31 Foundation 33 Convex part 35 Wings 35A 1st wing 35B 2nd wing 35a proximal end 35b distal end

Claims

1. A washing tub disposed in the outer tub; a stirring blade rotatably provided at the bottom of the washing tub; Equipped with The stirring blade has a base including a protruding portion protruding from a central portion and a plurality of blade portions protruding upward and extending radially in a radial direction from the protruding portion as a center, an upper edge of each of the plurality of wing portions has a flat surface that spreads from an end on the center side in the radial direction in a direction from the center side toward an outer side in the radial direction; washing machine.

2. The radially central end of the wing portion is defined as a proximal end, and the radially outer end is defined as a distal end, The range in which each of the plurality of wing portions has the flat surface is within a range between a position where the length of the base in the radial direction is 1 / 3 of the radius of the base and the proximal end, with the rotation center of the base as a reference. The washing machine according to claim 1.

3. The radially central end of the wing portion is defined as a proximal end, and the radially outer end is defined as a distal end, Each of the plurality of blade portions has a shape in which the distal end side is bent in the rotation direction of the stirring blade starting from an inflection position, the inflection position is within a range between a position where the length of the base in the radial direction is 1 / 2 of the radius of the base and a position where the length of the base in the radial direction is 2 / 3 of the radius of the base, based on the rotation center of the base. The washing machine according to claim 1.

4. a virtual line connecting the inflection position and the distal end is inclined by 15 degrees to 35 degrees in the rotation direction with respect to a virtual line connecting the proximal end and the inflection position; The washing machine according to claim 3.

5. The bending shape of each of the plurality of blade portions is a shape bending toward one side of the rotation direction around the rotation center of the agitating blade, each of the plurality of wing portions has a first inclined surface on the one side in the rotation direction and a second inclined surface on the other side in the rotation direction; a first angle of the first slope relative to the horizontal is greater than a second angle of the second slope relative to the horizontal; The washing machine according to claim 3.

6. an upper edge of each of the plurality of wing portions is inclined so as to be lower than the flat surface on an outer side of the flat surface in the radial direction; The washing machine according to any one of claims 1 to 5.

7. the plurality of wings include a first wing and a second wing; A first flat surface as the flat surface of the first wing portion and a second flat surface as the flat surface of the second wing portion are in the same plane. The washing machine according to any one of claims 1 to 5.

8. The flat surface and the upper surface of the convex portion are in the same plane. The washing machine according to any one of claims 1 to 5.

9. Each of the plurality of wing portions has a width in the rotation direction narrower on the flat surface than on the bottom side. The washing machine according to any one of claims 1 to 5.

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