WO2015059824A1

WO2015059824A1 - Washing machine

Info

Publication number: WO2015059824A1
Application number: PCT/JP2013/079002
Authority: WO
Inventors: 田中　啓之; 馬場　義一; 吉田　賢司
Original assignee: ハイアールアジアインターナショナル株式会社
Priority date: 2013-10-25
Filing date: 2013-10-25
Publication date: 2015-04-30
Also published as: JPWO2015059824A1; JP6294339B2

Abstract

A washing machine (1) includes a bottomed cylindrical shape rotating drum (7) having a central axis (10) extending obliquely upward, an outer drum (8) which houses the rotating drum (7) and in the interior of which water can be stored, and a heater (9) for heating the water within the outer drum (8). The rotating drum (7) houses laundry and is rotatable about the central axis (10). On the rotating drum (7), an aperture portion (13) for inserting and removing laundry is provided at an edge portion obliquely upward along the central axis (10), and a bottom portion (14) is provided at an edge portion obliquely downward along the central axis (10). The heater (9) is attached to the outer drum (8) so as to be disposed along a horizontal direction (H) at below the bottom portion (14) of the rotating drum (7) within the outer drum (8).

Description

Washing machine

This invention relates to a washing machine.

The washing machine described in Patent Document 1 below includes a washing tub disposed obliquely in a housing. The washing tub includes an outer tub for storing water during washing and a rotating drum rotatably accommodated in the outer tub.

JP 2009-165701 A

In the washing machine described in Patent Document 1, it is assumed that water in the outer tub is heated with a heater to make warm water, and the laundry is effectively washed with the hot water. Thus, when the heater for heating the water in an outer tank is provided, it is desired to prevent the malfunction regarding the said heater.

The present invention has been made under such a background, and an object of the present invention is to provide a washing machine capable of preventing problems related to a heater for heating water accumulated in an outer tub.

The invention according to claim 1 is a bottomed cylindrical shape having a central axis extending obliquely upward, and is a rotating drum that accommodates laundry and can rotate around the central axis, and is along the central axis An opening for putting in and out the laundry is provided at an obliquely upper end, and a rotating drum having a bottom is provided at an obliquely lower end along the central axis, and the rotating drum is accommodated, An outer tub in which water is stored, and attached to the outer tub so as to be disposed along the horizontal direction below the bottom of the rotating drum in the outer tub, for heating the water in the outer tub And a heater.

The invention according to claim 2 is characterized in that a drain outlet for discharging the water in the outer tub is provided at a position in the lowermost part in the outer tub that is removed from the heater in plan view. The washing machine according to claim 1.

The invention according to claim 3 is the washing machine according to claim 2, further comprising a temperature sensor provided in the heater and disposed close to the drain outlet.

Invention of Claim 4 is provided in the said outer tank, The holding | maintenance part which hold | maintains the front-end | tip part of the downstream in the attachment direction with respect to the said outer tank in the said heater is included, The upper part of the said holding part is in the said attachment direction. The washing machine according to any one of claims 1 to 3, further comprising a return portion that protrudes to the upstream side and that leads the leading end portion of the heater attached to the outer tub to the holding portion. It is.

According to a fifth aspect of the present invention, the inner surface of the outer tub is formed on the inner surface of the outer tub with respect to the lower outer peripheral surface so as to move downward from the lower outer peripheral surface of the rotating drum as it goes from the bottom side to the opening side. 5. The washing machine according to claim 4, wherein an inclined surface that is inclined is provided, and a fixing portion to which the holding portion is fixed is provided on the inclined surface.

According to the first aspect of the present invention, in the washing machine, the rotating drum is disposed obliquely with respect to the horizontal direction so that the central axis extends obliquely upward. In the rotating drum, an opening is provided at an obliquely upper end, and a bottom is provided at an obliquely lower end. In a washing machine including such a rotating drum, a heater for heating water accumulated in the outer tub is attached to the outer tub that accommodates the rotating drum.

This heater is arranged in the outer tank along the horizontal direction below the bottom of the rotating drum. In other words, even if the water level in the outer tank is low, the heater is arranged so that it does not protrude upward from the water surface in the outer tank (so that it is completely immersed in the water in the outer tank). Can be prevented (problems related to the heater).

According to the invention described in claim 2, although waste such as lint is likely to collect at the drain of the outer tub, the drain is provided at a position at the bottom of the outer tub that is separated from the heater in plan view. Therefore, it is possible to prevent the problem that the waste at the drain outlet adheres to the heater.

According to invention of Claim 3, since the flow of the water which goes to a drain outlet generate | occur | produces in the circumference | surroundings of a drain outlet, a temperature sensor provided in the heater is arranged close to the drain outlet, so that the temperature sensor Dirt such as detergent residue adhering to the water can be washed away by the water flow. Thereby, the malfunction that the temperature sensor of a heater gets dirty can be prevented.

According to the invention of claim 4, the return portion is provided on the upper portion of the holding portion that is provided in the outer tub and holds the tip of the heater, and when the heater is attached to the outer tub, the return portion is Then, the leading end of the heater is drawn into the holding part. Thereby, the malfunction that the front-end | tip part of a heater is not hold | maintained by a holding | maintenance part can be prevented.

According to the invention of claim 5, the inner surface of the outer tub is provided with an inclined surface that is inclined with respect to the lower outer peripheral surface so as to be separated from the lower outer peripheral surface of the rotating drum. A fixing portion to which the holding portion is fixed can be provided using the inclination of the inclined surface. Specifically, the fixing portion can be provided at an arbitrary position on the inclined surface so as to protrude from the inclined surface in a direction intersecting the inclined direction of the inclined surface.

FIG. 1 is a perspective view of a washing machine 1 according to an embodiment of the present invention as viewed obliquely from the front. FIG. 2 is a left side view of the vertical section of the washing machine 1. FIG. 3 is an AA arrow view of FIG. FIG. 4 is a BB arrow view of FIG. FIG. 5 is a view taken along the line CC of FIG. FIG. 6 is a view of a longitudinal section of the peripheral portion of the heater 9 in the washing machine 1 as viewed from the diagonally left rear. FIG. 7 is a DD arrow view of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a washing machine 1 according to an embodiment of the present invention as viewed obliquely from the front. FIG. 2 is a left side view of the vertical section of the washing machine 1. FIG. 3 is an AA arrow view of FIG. FIG. 4 is a BB arrow view of FIG.

In the following embodiment, the direction of the washing machine 1 is specified with reference to the time when the washing machine 1 is viewed from the front side as shown in FIG. That is, the front side of the paper surface in FIG. 1 is the front side (front side) of the washing machine 1, and the back side of the paper surface in FIG. 1 is the back side (rear side) of the washing machine 1. Moreover, the left-right direction (horizontal direction) in FIG. 1 corresponds with the left-right direction of the washing machine 1, and the up-down direction (vertical direction) in FIG.

As the washing machine 1 in this embodiment, a drum type laundry dryer having a function of drying laundry after washing is assumed. Therefore, in the washing machine 1, a washing process (washing process, rinsing process, and dehydration process) and a drying process are executed. However, the washing machine 1 may be a drum-type washing machine without a drying function.

As shown in FIG. 1, the washing machine 1 has a vertically long casing 2.

An operation panel 3 is provided at the upper end of the front surface of the housing 2. The operation panel 3 is provided with a liquid crystal display 4 and various buttons 5. Necessary information is displayed on the display 4. The user can set the operating condition of the washing machine 1 and can start or stop the operation of the washing machine 1 by operating the button 5.

On the front surface of the housing 2, a door 6 is provided below the operation panel 3. The door 6 has a substantially truncated cone shape whose diameter is reduced toward the rear side (see also FIG. 2). A hinge (not shown) is provided on either the left or right side of the door 6 in the housing 2, and the door 6 is connected to the housing 2 via the hinge. The door 6 can be opened and closed by rotating around the hinge. The door 6 in FIG. 1 is in a closed state, and when the door 6 in the state in FIG. 1 is pulled to the front side, the door 6 opens.

As shown in FIG. 2, the washing machine 1 mainly includes a rotating drum 7, an outer tub 8, and a heater 9 in the housing 2.

The rotating drum 7 has a bottomed cylindrical shape having a central shaft 10 extending obliquely upward, and can store laundry therein. That is, the rotating drum 7 has a so-called oblique drum structure that is disposed obliquely with respect to the horizontal direction H. The rotating drum 7 has a substantially cylindrical circumferential wall 11 concentric with the central shaft 10 and a disk-shaped bottom wall 12 connected to the rear end of the circumferential wall 11 to block the hollow portion of the circumferential wall 11 from the rear side. Is included. In the circumferential wall 11, the front end portion is gradually reduced in diameter toward the front side, and the front end edge on the inner peripheral surface of the circumferential wall 11 forms a circular opening 13 provided in the rotary drum 7. . The opening 13 is provided at an obliquely upper end along the central axis 10 in the rotary drum 7. The laundry can be taken in and out of the rotary drum 7 through the opening 13. The portion of the circumferential wall 11 connected to the bottom wall 12 and the bottom wall 12 constitute a bottom portion 14 provided at an obliquely lower end portion along the central axis 10 in the rotary drum 7.

The outer tub 8 has a bottomed cylindrical shape that is slightly larger than the rotating drum 7 and is elastically supported by the housing 2 via a plurality of dampers (not shown). The outer tub 8 has a substantially cylindrical shape, and the central axis thereof coincides with the central axis 10 of the rotating drum 7. The outer tub 8 has a substantially cylindrical circumferential wall 15 concentric with the central axis 10, and a disc-shaped bottom wall 16 connected to the rear end of the circumferential wall 15 to block the hollow portion of the circumferential wall 15 from the rear side. Is included in one. Water (including tap water, bath water, and water in which detergent is dissolved) is stored in the outer tub 8 from the bottom wall 16 side.

The circumferential wall 15 may be configured by combining a plurality of parts divided forward and backward. In the circumferential wall 15, the front end portion is reduced in a stepped shape toward the front side, and the front end edge on the inner circumferential surface of the circumferential wall 15 constitutes a circular doorway 17 provided in the outer tub 8. . The entrance / exit 17 is coaxial with the opening 13 of the rotary drum 7, faces the front from the front, and communicates therewith. An annular packing 18 is attached to the outer tub 8 and protrudes to the front side while rimming the inlet / outlet port 17 over the entire circumference. The seal 18 seals between the door 6 and the front edge of the outer tub 8 by tightly contacting the closed door 6, thereby preventing water in the outer tub 8 from leaking out of the inlet / outlet 17. it can. When the door 6 is opened, the opening 13 and the entrance 17 are opened forward, so that the laundry can be taken in and out of the rotary drum 7 through the opening 13 and the entrance 17.

A motor 19 (for example, a DD motor) is attached to the back surface of the bottom wall 16, and an output shaft 19 A of the motor 19 passes through the circular central portion of the bottom wall 16 and is connected to the central shaft 10 in the outer tub 8. Along the front upper side.

The outer tub 8 accommodates the rotating drum 7 coaxially therein. An output shaft 19 A of a motor 19 is connected to a circular center portion of the bottom wall 12 of the rotary drum 7. When the motor 19 is driven, the rotary drum 7 can rotate around the central axis 10. A plurality of through holes (not shown) are formed in at least one of the circumferential wall 11 and the bottom wall 12 of the rotating drum 7, and the hollow portion of the rotating drum 7 and the hollow portion of the outer tub 8 (the rotating drum). 7) other than the hollow portion) communicates with the through hole. Therefore, the water accumulated in the outer tub 8 can go back and forth between the rotating drum 7 and the outer tub 8.

Further, in the inner surface 8A of the outer tub 8 (strictly speaking, the lower inner peripheral surface 15A of the circumferential wall 15), the substantially lower half of the lower outer peripheral surface 7A (also the lower outer peripheral surface of the circumferential wall 11) of the rotating drum 7. An inclined surface 8B that is inclined with respect to the lower outer peripheral surface 7A is provided at a position facing the minute region from directly below. Specifically, a recess 20 that is recessed one step downward is formed in the region of the lower half of the lower inner peripheral surface 15A of the circumferential wall 15, and the bottom surface of the recess 20 is the aforementioned inclined surface 8B. . The inclined surface 8B is inclined with respect to the lower outer peripheral surface 7A so as to move downward from the lower outer peripheral surface 7A of the rotating drum 7 as it goes from the bottom 14 side of the rotating drum 7 to the opening 13 side (front upper side). (See also FIG. 3). Although the inclined surface 8B is inclined with respect to the lower outer peripheral surface 7A, it is actually a flat surface along the horizontal direction H (see also FIG. 3). The inclined surface 8B is the lowermost part in the outer tub 8. Therefore, the water accumulated in the outer tub 8 accumulates from the inclined surface 8B side. In the inclined surface 8B, a drain port 40 is provided at a corner on the back left side (see FIG. 4). The water in the outer tub 8 is discharged out of the machine through the drain port 40.

Next, the heater 9 will be described.

FIG. 5 is a view taken along the line CC of FIG. FIG. 6 is a view of a longitudinal section of the peripheral portion of the heater 9 in the washing machine 1 as viewed from the diagonally left rear. FIG. 7 is a DD arrow view of FIG.

The heater 9 is for heating the water in the outer tub 8. When the water in the outer tub 8 is heated by the heater 9 to become warm water, the laundry in the rotating drum 7 can be effectively washed with the warm water. That is, in the washing machine 1, the washing power of the laundry can be increased by washing with warm water.

Referring to FIG. 4, the heater 9 includes a main body portion 21 having a substantially U shape in plan view, and a horizontally long block-shaped base portion 22 connected to two end portions 21 A in the substantially U shape of the main body portion 21. Including. A portion of the substantially U-shaped main body 21 that is curved between the two end portions 21 A is a tip portion 9 A of the heater 9. The distal end portion 9A has an arc shape that bulges to the front side. A cord 23 is connected to each end 21A (see also FIG. 5). A control device (not shown) built in the washing machine 1 is electrically connected to the cord 23. In the heater 9, the main body 21 generates heat when electric power or a control signal is supplied from the control device via the cord 23. A so-called sheathed heater can be used as the heater 9.

Referring to FIG. 5, the heater 9 is disposed in the recess 20 in the lower inner peripheral surface 15 A of the circumferential wall 15 of the outer tub 8. Here, in the bottom wall 16 of the outer tub 8, an insertion hole 24 penetrating the bottom wall 16 in the front-rear direction is formed at a lower end portion adjacent to the bottom surface of the recess 20 (the inclined surface 8 B described above). The insertion hole 24 has a shape and a size that allow the base portion 22 of the heater 9 to be fitted. The heater 9 is attached to the outer tub 8 so that the tip portion 9A first passes through the insertion hole 24 in a posture along the horizontal direction H (inclined surface 8B) (flattened vertically). It is done. That is, the attachment direction X of the heater 9 with respect to the outer tub 8 is the front side (the right side in FIG. 5) along the horizontal direction H.

Further, when the attachment direction X is used as a reference, the tip 9A of the heater 9 is a downstream end in the attachment direction X. Here, the inclined surface 8 B of the outer tub 8 is provided with a holding portion 25 that holds the tip 9 A of the heater 9 attached to the outer tub 8.

Referring to FIG. 6, the holding portion 25 is configured by bending a metal plate, and integrally includes a pair of receiving members 26 and a return portion 27. In addition, since the holding | maintenance part 25 is metal, it does not melt with the heat | fever of the heater 9. FIG. The pair of receiving members 26 are disposed apart in the left-right direction. Each receiving member 26 includes a main body portion 28 having a substantially triangular shape when viewed from the left-right direction, a first bent portion 29 configured by bending the rear end portion of the main body portion 28 toward the counterpart receiving member 26, It integrally includes a second bent portion 30 formed by bending the front end portion of the main body portion 28 to the side opposite to the counterpart receiving member 26 (see also FIG. 4). In the middle of the first bent portion 29 in the vertical direction, a receiving groove 31 is formed to cut out the first bent portion 29 in a substantially U shape toward the main body portion 28 side (the opposite side described above). The receiving grooves 31 of the pair of receiving members 26 face each other in the left-right direction and are recessed in a substantially U shape in a direction away from each other (see also FIG. 3). The return portion 27 has a thin plate shape in the vertical direction, and is provided on each of the pair of receiving members 26. In each receiving member 26, the return portion 27 is bent at a substantially right angle from the upper end portion of the first bent portion 29, and extends horizontally to the rear side (left side in FIG. 6) from the first bent portion 29. That is, the return portion 27 is provided on the upper portion of the holding portion 25 and protrudes upstream in the attachment direction X.

Note that the return portions 27 of the pair of receiving members 26 may be integrated. Then, the pair of receiving members 26 are integrated. When the return portions 27 are not integrated with each other, the pair of receiving members 26 are integrated by installing another member (not shown) between the pair of receiving members 26.

In relation to the holding portion 25, a fixing portion 32 is provided in the middle of the inclined surface 8B of the outer tub 8 (strictly, a position closer to the front side). The fixing portion 32 is a boss provided in the same number (that is, a pair) as the pair of receiving members 26 of the holding portion 25. A pair of fixing | fixed part 32 is arrange | positioned away from right and left. Each fixing portion 32 is inclined forward with respect to the inclined surface 8B so as to be parallel to the lower outer peripheral surface 7A (in other words, the central axis 10) of the rotating drum 7 and to the front upper side (upper right side in FIG. 6). It protrudes. The pair of receiving members 26 are disposed between the pair of fixing portions 32 (see also FIG. 4). In this state, in each receiving member 26, the lower end portion of the main body portion 28 is along the inner side surface of the nearest fixing portion 32 (surfaces facing each other in the pair of fixing portions 32), and the second bent portion 30 is The surface is in contact with the front end surface 32A of the nearest fixing portion 32 while facing from the front side. As shown in FIG. 7, the front end face 32A is formed with a screw hole 33 extending in the direction opposite to the protruding direction of the fixing portion 32 (the rear lower side). In each of the pair of fixing portions 32 (receiving member 26), a screw 34 passes through the second bent portion 30 from the front side (the right side in FIG. 7) and is assembled into the screw hole 33. As a result, the entire holding part 25 is fixed to the pair of fixing parts 32.

Here, since the inclined surface 8B is provided to be inclined with respect to the lower outer peripheral surface 7A so as to be separated from the lower outer peripheral surface 7A of the rotary drum 7 as described above, the holding portion 25 is provided. The fixed portion 32 to be fixed can be provided by using the inclination of the inclined surface 8B. Specifically, the fixing portion 32 is provided at an arbitrary position on the inclined surface 8B so as to protrude from the inclined surface 8B in a direction crossing the inclination direction of the inclined surface 8B (inclination direction with respect to the lower outer peripheral surface 7A). Can do. In other words, the fixed portion 32 can be configured compactly without forming a columnar shape that extends unnecessarily long along the inclined surface 8B.

As described above, when the heater 9 is attached to the outer tub 8, the distal end portion 9 A of the heater 9 passes through the insertion hole 24 (see FIG. 5) of the bottom wall 16 of the outer tub 8, and then downstream in the attachment direction X. Head to. A return portion 27 provided on the upper portion of the holding portion 25 is located on the upper side of the tip portion 9A. Therefore, the leading end 9 A of the heater 9 attached to the outer tub 8 is not lifted but is drawn into the receiving grooves 31 (see FIG. 6) of the pair of receiving members 26 in the holding unit 25 by the return portion 27. Thereby, in the heater 9 after attachment, the malfunction (erroneous attachment) that the front-end | tip part 9A of the heater 9 is not hold | maintained by the holding | maintenance part 25 can be prevented.

In the heater 9 attached to the outer tub 8 as described above, as shown in FIG. 6, the distal end portion 9 A (main body portion 21) of the heater 9 fits into the receiving grooves 31 of the pair of receiving members 26 in the holding portion 25. As a result, the base portion 22 completely closes the insertion hole 24 as shown in FIG. 5. An engaging portion 41 is provided at the rear end portion of the base portion 22. The engaging portion 41 has a hook shape protruding outward from the rear end portion of the base portion 22 in the vertical and horizontal directions (see also FIG. 6). The base portion 22 is positioned with respect to the outer tub 8 by the engaging portion 41 being hooked from the rear side to the peripheral portion of the insertion hole 24 in the bottom wall 16 of the outer tub 8. The base portion 22 may be further fixed to the outer tub 8 with screws (not shown). Further, a packing (not shown) for sealing (water sealing) between the peripheral edge portion of the insertion hole 24 and the base portion 22 may be provided.

Thus, the heater 9 attached to the outer tub 8 is slightly lifted from the bottom surface (inclined surface 8B) of the recess 20 and below the bottom portion 14 (lower end portion of the bottom portion 14) of the rotating drum 7 in the outer tub 8. It is arranged along the horizontal direction H in the (right below) dent 20. Strictly speaking, the upper surface 9B of the heater 9 (at least the upper surface 21B of the main body 21 that is a heat generating component) only needs to be along the horizontal direction H over the entire region. If the heater 9 is disposed along the horizontal direction H below the bottom portion 14 of the rotating drum 7 in the outer tub 8, not along the lower outer peripheral surface 7 A of the rotating drum 7, Even if the water level is low, the heater 9 is disposed so as not to protrude upward from the water surface W in the outer tub 8 (so as to be completely immersed in the water in the outer tub 8). Therefore, failure of the heater 9 due to emptying (problems related to the heater 9) can be prevented, and hot water can be generated in a short time.

Further, as shown in FIG. 4, the drain port 40 provided on the inclined surface 8B is at a position deviated from the heater 9 in a plan view (a position not overlapping the heater 9 in a plan view). Although waste such as lint tends to collect in the drainage port 40, the drainage port 40 is provided at a position in the lowermost part of the outer tub 8 away from the heater 9 in plan view. Can be prevented from adhering to the heater 9.

Further, a temperature sensor 35 for detecting the temperature of the heater 9 or the water temperature around the heater 9 is provided in a portion sandwiched between the pair of end portions 21A of the main body portion 21 on the front surface 22A of the base portion 22 of the heater 9. It has been. The temperature sensor 35 is provided so as to protrude from the front surface 22A of the base portion 22 to the front side. It is preferable that the temperature sensor 35 is disposed close to the drain port 40. Specifically, the temperature sensor 35 may be disposed so as to be exposed to the flow of water around the drain port 40 that is going to the drain port 40 during drainage. Since a water flow toward the drain port 40 is generated around the drain port 40, the detergent attached to the temperature sensor 35 is disposed by placing the temperature sensor 35 provided in the heater 9 close to the drain port 40. Dirt such as residue can be washed away by the water flow. Thereby, the malfunction that the temperature sensor 35 of the heater 9 gets dirty can be prevented.

Further, as shown in FIG. 5, since the heater 9 is arranged along the horizontal direction H, the temperature of the heater 9 and its surroundings at the time of heat generation is a substantially uniform value. Therefore, the temperature of the heater 9 and its surroundings can be detected sufficiently accurately with only one temperature sensor 35 provided in the heater 9. By the way, unlike the present invention, when the heater 9 is inclined along the rotary drum 7, the temperature of the heater 9 and its surroundings varies depending on the upper and lower positions. A plurality of temperature sensors 35 are required. However, in the present invention, since the temperature sensor 35 can be suppressed to a small amount, the heater 9 can be downsized accordingly.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Washing machine 7 Rotating drum 7A Lower outer peripheral surface 8 Outer tub 8A Inner surface 8B Inclined surface 9 Heater 9A Tip 10 Central shaft 13 Opening portion 14 Bottom portion 21 Body portion 25 Holding portion 27 Return portion 32 Fixing portion 35 Temperature sensor 40 Drain port H Horizontal direction X Mounting direction

Claims

It is a bottomed cylindrical shape having a central axis extending obliquely upward, and is a rotating drum that accommodates the laundry and is rotatable about the central axis, and is disposed at the diagonally upper end along the central axis. A rotary drum provided with an opening for taking in and out objects, and provided with a bottom at an obliquely lower end along the central axis;
An outer tub that houses the rotating drum and stores water therein;
A heater attached to the outer tub so as to be disposed along the horizontal direction below the bottom of the rotating drum in the outer tub, and for heating water in the outer tub;
A washing machine comprising:
The washing machine according to claim 1, wherein a drain port for discharging water in the outer tub is provided at a position at a lowermost position in the outer tub that is out of the heater in plan view. .
The washing machine according to claim 2, further comprising a temperature sensor provided in the heater and arranged close to the drain port.
A holding portion that is provided in the outer tub, and holds a distal end portion of the heater in the mounting direction with respect to the outer tub;
The upper portion of the holding portion is provided with a return portion that protrudes to the upstream side in the mounting direction and that guides the tip of the heater attached to the outer tub to the holding portion. Item 4. The washing machine according to any one of Items 1 to 3.
The inner surface of the outer tub is provided with an inclined surface that is inclined with respect to the lower outer peripheral surface so as to move away from the lower outer peripheral surface of the rotating drum as it goes from the bottom side to the opening side. And
The washing machine according to claim 4, wherein the inclined surface is provided with a fixing portion to which the holding portion is fixed.