Washing machine

Abstract

To provide a washing machine displaying information of residual quantity of liquid agent by a simple structure.SOLUTION: A washing machine according to the disclosure comprises: a washing tank; a liquid agent tank in which a liquid agent to be supplied to the washing tank is stored; a floating part having buoyancy against the liquid agent stored in the liquid agent tank; a movable part that rotates according to upward or downward movement of the floating part; an arm to physically connect between the floating part and the movable part; and a window allowing the movable part to be visible. The movable part rotates relatively to the window.SELECTED DRAWING: Figure 6B

Description

[Technical Field]

[0001] The present disclosure relates to washing machines. [Background technology]

[0002] For example, Patent Document 1 discloses a washing machine having a washing tub, a liquid agent tank, a pump unit that supplies the liquid agent in the liquid agent tank into the washing tub, and a remaining amount detection means that detects the remaining amount of liquid agent in the liquid agent tank.

[0003] The remaining amount detection means in the washing machine described in Patent Document 1 includes a float that floats in the liquid agent and a linear Hall element that detects the float. The float is rotatably mounted on the lid of the liquid agent tank. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-37721 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the remaining amount detection means has a linear Hall element, which tends to make the remaining amount detection means expensive to construct. Therefore, there is a demand for a simplification of the remaining amount detection means.

[0006] The object of the present disclosure is to solve the above problem and to provide a washing machine with an automatic dispensing function with a simple structure to display information regarding the remaining amount of liquid agent. [Means for solving the problem]

[0007] A washing machine according to one aspect of the present disclosure includes a washing tub, a liquid agent tank for storing a liquid agent to be supplied to the washing tub, a floating part having buoyancy relative to the liquid agent stored in the liquid agent tank, a movable part that rotates in response to the raising and lowering of the floating part, an arm that physically connects the floating part and the movable part, and a window that allows the movable part to be viewed, and the movable part rotates relative to the window.

[0008] A cleaning device according to one aspect of the present disclosure includes a storage tank, a liquid tank for storing the liquid to be supplied to the storage tank, a floating part that has buoyancy relative to the liquid stored in the liquid tank, a movable part that rotates in response to the raising and lowering of the floating part, an arm that physically connects the floating part and the movable part, and a window that allows the movable part to be viewed, and the movable part rotates relative to the window.

[0009] A liquid agent tank according to one embodiment of the present disclosure is a liquid agent tank for storing a liquid agent, and includes a floating portion that has buoyancy relative to the stored liquid agent, a movable portion that rotates in response to the raising and lowering of the floating portion, an arm that physically connects the floating portion and the movable portion, and a window that allows the movable portion to be viewed, and the movable portion rotates relative to the window. [Effects of the Invention]

[0010] According to the present disclosure, a washing machine with an automatic dispensing function can be provided that displays information about the remaining amount of liquid agent with a simple structure. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a washing machine according to a first embodiment of the present disclosure; [Figure 2] Schematic diagram of a washing machine according to a first embodiment of the present disclosure. [Figure 3] Perspective view of the liquid supply unit [Figure 4] Perspective view of the liquid supply unit [Figure 5] Exploded view of the fluid supply unit [Figure 6A] Fluid reservoir cross section [Figure 6B] Fluid reservoir cross section [Figure 7]Exploded view of roller float structure [Figure 8] Perspective view of roller float structure [Figure 9] Perspective view of roller float structure [Figure 10] Schematic diagram of the outer surface of the roller float structure [Figure 11] An enlarged view of the structure around the roller member of FIG. 6B. [Figure 12A] Schematic diagram of the roller float structure seen through the window [Figure 12B] Schematic diagram of the roller float structure seen through the window [Figure 12C] Schematic diagram of the roller float structure seen through the window [Figure 12D] Schematic diagram of the roller float structure seen through the window [Figure 13] A perspective view of a roller member [Figure 14] Cross-sectional view of the lid and part of the liquid supply unit [Figure 15] Perspective view of the lid [Figure 16] Exploded view of the lid DETAILED DESCRIPTION OF THE INVENTION

[0012] (Embodiment 1) A washing machine according to a first embodiment of the present disclosure will be described.

[0013] [Overall configuration] FIG. 1 is a perspective view of a washing machine 1 according to a first embodiment of the present disclosure. FIG. 2 is a schematic cross-sectional view showing the washing machine 1 according to the first embodiment of the present disclosure. As shown in FIG. 1, the washing machine 1 is a drum-type washing machine, but is not limited to this. The washing machine 1 may also be a top-loading washing machine or a washer-dryer.

[0014] In the following drawings, the mutually orthogonal horizontal directions are referred to as the X direction and the Y direction, and the vertical direction orthogonal to both the X direction and the Y direction is referred to as the Z direction. The horizontal direction and the vertical direction are the horizontal direction and the vertical direction, respectively, when the washing machine 1 is used in a freestanding state. The X direction may also be referred to as the front-rear direction, and the Y direction may also be referred to as the width direction.

[0015] As shown in FIG. 2, the washing machine 1 includes a housing 2, an outer tub 3, a washing tub 4, a drive unit 5, a liquid supply unit 6, a connecting flow path 8, a water supply device 10, a drain valve 11, and a control unit 12.

[0016] <Case> The housing 2 is a component that forms the exterior of the washing machine 1. The housing 2 accommodates an outer tub 3, a washing tub 4, a drive unit 5, a liquid agent supply unit 6, a connection flow path 8, a water supply device 10, a drain valve 11, and a control unit 12. An opening 20 and an openable / closable housing lid 21 that covers the opening 20 are provided on a front surface 2A of the housing 2.

[0017] <Outer tank> The outer tub 3 is a roughly cylindrical member provided inside the housing 2 and functions to store wash water. The outer tub 3 may also be referred to as a water tub. The central axis V0 of the outer tub 3 passes through the center of the bottom of the outer tub 3 and is inclined relative to the horizontal (X direction). The outer tub 3 has an opening 31 at a position facing the opening 20 of the housing 2. The edge of the opening 31 is connected to the opening 20 of the housing 2 in a sealed manner by a bellows 32.

[0018] <Washing tub> The washing tub 4 is a generally cylindrical member rotatably disposed around a central axis V0 inside the outer tub 3 and used to store laundry such as clothes. The washing tub 4 may also be referred to as an inner tub, a storage tub, or a drum. The washing tub 4 has a large number of through-holes 40 formed therein. The through-holes 40 connect the washing tub 4 and the outer tub 3, allowing the movement of wash water between the washing tub 4 and the outer tub 3. The washing tub 4 has an opening 41 at a position facing the opening 20 in the housing 2 and the opening 31 in the outer tub 3. A user of the washing machine 1 can open the housing lid 21 and place laundry into the washing tub 4 through the openings 20, 31, and 41.

[0019] <Drive unit> The driving unit 5 is a member that drives the washing tub 4 to rotate around the central axis V0. The driving unit 5 has, for example, a motor that rotates the washing tub 4.

[0020] <Liquid supply unit> The liquid supply unit 6 is a device that automatically supplies a single dose of liquid from a liquid tank that stores multiple doses of liquid to the washing tub 4. The single dose of liquid is an appropriate amount and type of liquid determined by the control unit 12 according to, for example, the contents of the operation course and the amount of laundry.

[0021] The liquid drug supply unit 6 is disposed above the outer tank 3 within the housing 2. In the first embodiment, the bottom of the liquid drug supply unit 6 has a shape that follows the outer peripheral surface of the outer tank 3.

[0022] <Connection flow path> The connection flow path 8 is a flow path for connecting the liquid drug supply unit 6 and the outer tank 3. The connection flow path 8 extends downward from the liquid drug supply unit 6 to an opening 33 provided in the upper part of the outer tank 3.

[0023] <Water supply device> The water supply device 10 is connected to a water source such as a tap, and supplies water to the outer tank 3 via the liquid agent supply unit 6 and the connecting flow path 8. The water supply device 10 has, for example, a water supply valve connected to the tap.

[0024] <Drain valve> The drain valve 11 is a valve that can be opened and closed, and when closed, it stores water in the outer tub 3, and when open, it drains the water stored in the outer tub 3. The drain valve 11 is disposed at the bottom of the housing 2, and is connected to an opening 35 provided at the bottom of the outer tub 3.

[0025] <Control unit> Control unit 12 is a controller that controls washing machine 1. Control unit 12 includes a general-purpose processor such as a CPU or MPU that executes programs to achieve predetermined functions. Control unit 12 calls and executes programs stored in memory (not shown) to achieve various controls in washing machine 1. Control unit 12 is not limited to a controller that achieves predetermined functions through the cooperation of hardware and software, and may be a hardware circuit designed specifically to achieve predetermined functions.

[0026] Specifically, the control unit 12 controls the drive unit 5, the liquid agent supply unit 6, the water supply device 10, and the drain valve 11.

[0027] Next, the structure of the liquid agent supply unit 6 will be described in more detail.

[0028] 3 and 4 are perspective views of the liquid agent supply unit 6 accommodating the liquid agent tanks 61A and 61B. Fig. 5 is an exploded view of the liquid agent supply unit 6 accommodating the liquid agent tanks 61A and 61B.

[0029] As shown in FIGS. 3 and 4, the liquid supply unit 6 includes liquid tanks 61A and 61B, a case 62, liquid pumps 63A and 63B, and a liquid discharge flow path 64 (FIG. 4).

[0030] The liquid agent tanks 61A and 61B are containers for storing liquid agents. In the first embodiment, the liquid agent tank 61A stores a detergent, and the liquid agent tank 61B stores a fabric softener. However, the liquid agent tanks 61A and 61B may store other types of liquid agents.

[0031] The case 62 is a case that houses the liquid tanks 61 A and 61 B. The liquid tanks 61 A and 61 B are housed in the case 62 at the same time, lined up in the Y direction.

[0032] The liquid agent tank 61A is deeper than the liquid agent tank 61B. When housed in the case 62, the upper surfaces of the liquid agent tanks 61A and 61B are at the same height, and the bottom of the liquid agent tank 61A is at a height lower than the bottom of the liquid agent tank 61B.

[0033] 4, liquid pumps 63A and 63B arranged in the Y direction are connected from the X direction to liquid tanks 61A and 61B, respectively. Both ends of liquid pumps 63A and 63B are connected from above to liquid discharge flow paths 64 that are connected to a rear surface 66 of case 62. Liquid pumps 63A and 63B suck out a predetermined amount of liquid from liquid tanks 61A and 61B, respectively, and discharge it into liquid discharge flow paths 64.

[0034] The liquid agent discharged into the liquid agent discharge flow path 64 merges with the water flowing through the liquid agent discharge flow path 64. The water and the liquid agent in the liquid agent discharge flow path 64 flow from the liquid agent discharge flow path 64 into the case 62, and are supplied to the outer tub 3 and the washing tub 4 through a connecting flow path 8 (FIG. 2) connected to an opening 67 (FIG. 5) provided at the bottom of the case 62.

[0035] 5, the liquid pump 63A has a suction portion 71A connectable to the liquid tank 61A and a discharge portion 72A connected to the liquid discharge flow path 64. The liquid pump 63B has a suction portion 71B connectable to the liquid tank 61B and a discharge portion 72B connected to the liquid discharge flow path 64. When the liquid pumps 63A and 63B are driven, the liquid stored in the liquid tanks 61A and 61B is sucked out through the suction portions 71A and 71B and discharged from the discharge portions 72A and 72B.

[0036] A connecting portion 69A into which the suction portion 71A of the liquid agent pump 63A is inserted is provided on a rear surface 74A of the liquid agent tank 61A. A connecting portion 69B into which the suction portion 71B of the liquid agent pump 63B is inserted is provided on a rear surface 74B of the liquid agent tank 61B. The connecting portions 69A and 69B have a cylindrical structure extending into the liquid agent tanks 61A and 61B. In the first embodiment, the connecting portions 69A and 69B are provided at the bottoms of the liquid agent tanks 61A and 61B, respectively.

[0037] Suction portions 71A and 71B of the liquid pumps 63A and 63B pass through openings 68A and 68B provided in the rear surface 66 of the case 62, are connected to connection portions 69A and 69B, and communicate with the liquid tanks 61A and 61B, respectively.

[0038] The liquid agent tanks 61A and 61B are removable from the case 62. A user of the washing machine 1 can pull the liquid agent tanks 61A and 61B toward the -X side to remove them from the liquid agent pumps 63A and 63B, and then remove the detached liquid agent tanks 61A and 61B from the case 62. This structure makes it easy to maintain, clean, and refill the liquid agent tanks 61A and 61B.

[0039] Note that the connection parts 69A and 69B are provided with valves, so that even when the liquid tanks 61A and 61B are detached from the liquid pumps 63A and 63B, the liquid can be prevented from leaking out of the liquid tanks 61A and 61B.

[0040] Next, the structure of the liquid tanks 61A and 61B will be described in more detail. In the following description, the liquid tanks 61A and 61B will be collectively referred to as the liquid tank 61.

[0041] 6A and 6B are cross-sectional views of the liquid agent tank 61. FIG. 6A shows an initial state in which the remaining amount of liquid agent in the liquid agent tank 61 is equal to or greater than a predetermined amount (first predetermined liquid level H1). FIG. 6B shows a low remaining amount state in which the remaining amount of liquid agent in the liquid agent tank 61 has fallen below the predetermined amount (first predetermined liquid level H1). Note that in the initial state, the liquid agent tank 61 does not have to be completely filled with the liquid agent. The initial state may refer to the state after the user has refilled the liquid agent tank 61 with a certain amount of liquid agent.

[0042] As shown in Figures 6A and 6B, the liquid agent tank 61 has a tank body 81, a tank lid 82, and a roller float structure 83. The tank body 81 is a container that defines an internal space for storing the liquid agent. The tank lid 82 is a member that covers and closes the top of the tank body 81. The roller float structure 83 is a member that is rotatably attached to the tank lid 82, and is displaced according to the liquid level of the liquid agent in the tank body 81.

[0043] Specifically, the roller float structure 83 rotates relative to the tank lid 82 in response to the rise or fall of the liquid level. The roller float structure 83 can rotate between a first position in the initial state shown in Fig. 6A and a second position in the low-amount state shown in Fig. 6B.

[0044] In the first embodiment, the roller float structure 83 is housed in the liquid agent tank 61. On the other hand, in other embodiments, a part or all of the roller float structure 83 may protrude from the liquid agent tank 61 in the second position.

[0045] FIG. 7 is an exploded view of the roller float structure 83.

[0046] 7, the roller float structure 83 has two members: a roller member 51 and a float member 52. The roller member 51 is fitted with the float member 52 and moves integrally therewith.

[0047] The roller member 51 is a member having a rotation shaft 53 rotatably attached to the tank lid 82. The float member 52 is a member that has buoyancy relative to the liquid surface. The roller member 51 rotates as the float member 52 changes its position in response to the liquid surface.

[0048] 8 and 9 are perspective views of the roller float structure 83. FIG.

[0049] As shown in Figures 8 and 9, the roller member 51 has a rotating shaft 53 rotatably attached to the tank lid 82, and a wall portion 54 (second wall portion). As shown in Figures 6A and 6B, the rotating shaft 53 is attached to a protruding portion 86 that protrudes upward on the tank lid 82. The rotating shaft 53 extends in the width direction (Y direction) of the liquid agent tank 61. The direction in which the rotating shaft 53 extends may also be referred to as the axial direction L (Figures 8 and 9). The wall portion 54 extends in the circumferential direction C around the rotating shaft 53. There is a gap between the wall portion 54 and the rotating shaft 53 in the radial direction R that is perpendicular to the axial direction L.

[0050] By attaching the rotating shaft 53 to the protruding portion 86, it becomes easy to position the rotating shaft 53 above the liquid level of the liquid agent in the liquid agent tank 61. Therefore, it is possible to prevent the liquid agent from adhering to the rotating shaft 53 and prevent the rotating shaft 53 from sticking.

[0051] As shown in FIGS. 8 and 9 , the float member 52 has a bearing portion 55, a wall portion 56 (first wall portion), an arm 57, and a float portion 58. The bearing portion 55 fits onto the rotating shaft 53 and rotates integrally therewith. The bearing portion 55 forms a recess 45 that fits onto the rotating shaft 53. The wall portion 56 is adjacent to the wall portion 54 on the outside of the bearing portion 55 and extends in the circumferential direction C around the rotating shaft 53. The arm 57 is a rod-shaped member that extends from the bearing portion 55 and has a float portion 58 at its tip. In other words, the arm 57 physically connects the float portion 58 and the bearing portion 55. The float portion 58 is a member that has buoyancy with respect to the liquid agent and rises and falls following the liquid surface. The rise and fall of the float portion 58 causes the arm 57 to rotate around the rotating shaft 53.

[0052] Similar to the wall portion 54 of the roller member 51, the wall portion 56 is spaced apart from the rotation shaft 53 in the radial direction R and is aligned with the wall portion 54 in the circumferential direction C. A gap T extending in the axial direction L is formed between the wall portion 54 and the wall portion 56.

[0053] The surfaces of the wall portions 54, 56 that are away from the rotation axis 53 are referred to as outer peripheral surfaces S1, S2. The outer peripheral surface S1 (second outer peripheral surface) is adjacent to the outer peripheral surface S2 (first outer peripheral surface) and is located on approximately the same circumferential surface as the outer peripheral surface S2.

[0054] Fig. 10 is a schematic diagram of the outer peripheral surfaces S1 and S2 of the roller float structure 83 as viewed from above the liquid agent tank 61. In Fig. 10, different colors are displayed using different patterns. As shown in Fig. 10, in the first embodiment, the outer peripheral surfaces S1 and S2 have different colors. That is, the color of the roller float structure 83 changes before and after the gap T between the wall portion 54 and the wall portion 56.

[0055] Fig. 11 is an enlarged view of the structure around the roller member 51 in Fig. 6B. As shown in Fig. 11, the liquid tank 61 has a window 84 at the top so that the wall portions 54, 56 can be seen from outside the liquid tank 61. The window 84 is an opening provided in a protruding portion 86 of the tank lid 82 so as to overlap with the wall portions 54, 56.

[0056] The opening area of ​​window 84 is smaller than the area of ​​outer peripheral surface S1 of wall portion 54 and smaller than the area of ​​outer peripheral surface S2 of wall portion 56. Therefore, the range of walls 54, 56 that the user of washing machine 1 can see is limited by window 84. As roller float structure 83 rotates, the portion that overlaps window 84 changes between wall portion 54 and wall portion 56. If the amount of rotation from the initial state is small, outer peripheral surface S2 of wall portion 56 overlaps window 84, and if the amount of rotation is large, outer peripheral surface S1 of wall portion 54 overlaps window 84. By checking window 84, the user of washing machine 1 can grasp the amount of rotation of roller float structure 83 and the remaining amount of liquid agent indicated by the amount of rotation.

[0057] Each of the outer peripheral surfaces S1 and S2 has a gap in the radial direction R from the rotation shaft 53. Compared to when the outer peripheral surfaces S1 and S2 do not have a gap from the rotation shaft 53, the movement amount of the outer peripheral surfaces S1 and S2 in the circumferential direction C can be increased for the same rotation angle. This makes it easier for the user of the washing machine 1 to grasp the rotation amount of the roller float structure 83.

[0058] Window 84 opens obliquely upward. Specifically, window 84 is provided in wall portion 87 that slopes downward from the upper surface of protrusion 86 in the −X direction, and opens upward and in the −X direction. With this configuration, window 84 is easier to see for a user of washing machine 1 standing on the front side (−X side) of housing 2, compared to when window 84 opens only upward or when window 84 opens only forward.

[0059] In the first embodiment, the window 84 is a through opening, but a transparent member may be provided inside and / or outside the window 84 so as to overlap the window 84.

[0060] The operation of the roller float structure 83 having the above-described structure will now be described. Figures 12A to 12D are schematic diagrams of the outer peripheral surfaces S1 and S2 of the roller float structure 83 as seen through the window 84 while the roller float structure 83 is in operation.

[0061] As shown in Fig. 6A, in the initial state in the first embodiment, only the outer peripheral surface S2 of the wall portion 56 overlaps with the window 84. As shown in Fig. 12A, the color of the outer peripheral surface S2 is displayed over the entire window 84. A user of the washing machine 1 can see only the color of the outer peripheral surface S2 through the window 84 and recognize that a sufficient amount of liquid agent is stored in the liquid agent tank 61.

[0062] When the amount of liquid agent in the liquid agent tank 61 decreases, the liquid level drops from the initial state, and accordingly, the float portion 58 also drops. As the float portion 58 drops, the float member 52 and the roller member 51 fitted with the float member 52 rotate around the rotation axis 53. As the float member 52 and the roller member 51 rotate, the wall portions 54 and 56 also rotate around the rotation axis 53 and rotate relative to the window 84.

[0063] Considering that the walls 54, 56 are displaceable relative to the window 84, they may be referred to as movable parts.

[0064] When the liquid level is equal to or higher than the second predetermined liquid level H2 (FIG. 6A) and the rotation amount of the walls 54, 56 is equal to or less than a predetermined amount, only the outer surface S2 of the wall 56 remains overlapped with the window 84 (FIG. 12A).

[0065] When the liquid level falls below the second predetermined liquid level H2 (FIG. 6A) and the amount of rotation of the wall portions 54, 56 exceeds a predetermined amount, a portion of the outer peripheral surface S1 of the wall portion 54 overlaps with the window 84, in addition to the outer peripheral surface S2 of the wall portion 56. In other words, the gap T between the outer peripheral surfaces S1 and S2 overlaps with the window 84. As shown in FIGS. 12B and 12C, the color of the outer peripheral surface S1 is displayed in a portion of the window 84. The user of the washing machine 1 can visually recognize the color of the outer peripheral surface S1 as well as the color of the outer peripheral surface S2 through the window 84, and can recognize that the liquid agent in the liquid agent tank 61 is beginning to run low. In addition, the user of the washing machine 1 can recognize that it is approaching the time to refill the liquid agent tank 61 with liquid agent.

[0066] As shown in FIG. 6B, when the liquid level further drops below the first predetermined liquid level H1 (low remaining state), and the walls 54, 56 further rotate, only the outer peripheral surface S1 of the wall 54 overlaps with the window 84. As shown in FIG. 12D, the color of the outer peripheral surface S1 is displayed over the entire window 84. The display of the color of only the outer peripheral surface S1 may be referred to as a "low remaining amount display." The user of the washing machine 1 can see only the color of the outer peripheral surface S1 through the window 84 and recognize that the liquid agent in the liquid agent tank 61 is running low. The user of the washing machine 1 can also recognize that it is time to refill the liquid agent tank 61 with liquid agent.

[0067] 11, the roller member 51 further has a stopper 59 that protrudes outward in the radial direction R from the outer peripheral surface S1 of the wall portion 54. The tank lid 82 has a wall portion 85 against which the stopper 59 abuts when the remaining amount is low. This structure prevents the roller float structure 83 from rotating excessively, and limits the rotation range of the walls 54, 56.

[0068] When the stopper 59 is in contact with the wall portion 85, the recess 45 formed by the bearing portion 55 of the float member 52 opens obliquely upward. Specifically, the recess 45 opens in the −X direction toward the wall portion 85 and upward.

[0069] The arm 57 of the float member 52 has a protrusion 47 that protrudes toward the stopper 59. When the stopper 59 is in contact with the wall portion 85, if a force is further applied to the arm 57 of the float member 52 in the -X direction, the protrusion 47 will come into contact with the stopper 59.

[0070] Therefore, when a force in the -X direction is further applied to the arm 57 of the float member 52, the protrusion 47 becomes the fulcrum, and a force in the +X direction, which is opposite to the -X direction, is applied to the bearing part 55 of the float member 52. As a result, the bearing part 55 of the float member 52 is more likely to come off the rotating shaft 53. With this structure, even if a force in the -X direction is applied to the arm 57, the bearing part 55 comes off the rotating shaft 53 before the arm 57 breaks, and failure of the roller float structure 83 can be suppressed.

[0071] In the wall portion 54, the end portion 44 on the outer side in the radial direction R (the side farther from the rotation shaft 53) protrudes in the circumferential direction C more than other parts of the wall portion 54. In the wall portion 56, the end portion 46 on the inner side in the radial direction R (the side closer to the rotation shaft 53) protrudes in the circumferential direction C more than other parts of the wall portion 56. When viewed from the radial direction R, the end portion 44 of the wall portion 54 overlaps with the end portion 46 of the wall portion 56. In other words, when viewed from the window 84, the end portion 46 of the wall portion 56 is located below the end portion 44 of the wall portion 54 and the gap T between the wall portions 54 and 56.

[0072] When viewed from the axial direction L (Y direction), the end 44 of the wall portion 54 forms a step 34 having a portion extending in the radial direction R and a portion extending in the circumferential direction C. The end 46 of the wall portion 56 faces the step 34 in the radial direction R and forms a step 36 having a portion extending in the radial direction R and a portion extending in the circumferential direction C. The step 36 may contact the step 34.

[0073] Due to the steps 34 and 36, the gap T has a polygonal line shape in cross section as viewed from the Y direction.

[0074] With this configuration, even when a shadow is visible through the gap T between the wall portions 54 and 56, the arrangement of the lower end portion 46 makes the shadow less likely to become dark and less noticeable.

[0075] Returning to Figure 9, float part 58 is connected to the lower end of arm 57. Float part 58 has a hollow cylindrical shape extending along axial direction L. Therefore, the liquid stored in liquid tank 61 flows into float part 58 from both sides in the axial direction L.

[0076] With this configuration, the number of parts can be reduced compared to when air is sealed inside, and thus the float portion 58 can be realized at low cost. Also, compared to when air is sealed inside, the buoyancy acting on the float portion 58 can be reduced, and therefore the float portion 58 is positioned in a more submerged state relative to the liquid surface in the liquid agent tank 61. Therefore, the height of the liquid level when the wall portion 54 is exposed according to the liquid level in the liquid agent tank 61 can be made higher compared to when air is sealed inside. Therefore, it is possible to indicate to the user at a higher liquid level that the remaining amount is decreasing.

[0077] Furthermore, since float portion 58 has a cylindrical shape, even when roller float structure 83 rotates, the volume of the liquid agent flowing into float portion 58 can be easily maintained constant.

[0078] The float portion 58 has notches 58A recessed axially from each end in the axial direction L. The notches 58A reduce the weight of the float portion 58, and the buoyancy acting on the roller float structure 83 can be adjusted.

[0079] Depending on the depths of the liquid agent tanks 61A and 61B, the length of the arm 57 and the shape of the floating portion 58 may differ between the liquid agent tanks 61A and 61B. For example, the floating portion 58 of the liquid agent tank 61A may have a notch 58A, and the notch may be omitted from the floating portion 58 of the liquid agent tank 61B.

[0080] Fig. 13 is a perspective view of the roller member 51. As shown in Fig. 13, the roller member 51 has a connection portion 88 that connects the rotary shaft 53 and the wall portion 54. The connection portion 88 connects the vicinity of the center of the rotary shaft 53 in the axial direction L to the wall portion 54.

[0081] The first portion 91 of the rotating shaft 53 on one side of the connecting portion 88 has a smaller dimension in the radial direction R than the second portion 92 of the rotating shaft 53 on the other side of the connecting portion 88. The bearing portion 55 of the float member 52 has two recesses 45 corresponding to the portions 91, 92 (see FIG. 9), and the recess 45 corresponding to the first portion 91 is smaller than the recess 45 corresponding to the second portion 92. With this configuration, it is possible to prevent the float member 52 from being oriented incorrectly when attaching the float member 52 to the roller member 51.

[0082] Next, the case lid 22 of the housing 2 that covers the liquid medicine supply unit 6 will be described.

[0083] Returning to FIG. 1 , the housing 2 has an openable case lid 22 on the top surface. The case lid 22 is provided closer to the front surface 2A (the side surface on the -X side) of the housing 2 than to the back surface 2B (the side surface on the +X side) of the housing 2. In this specification, the front surface of the housing 2 may refer to the side surface of the housing 2 that is closer to the user operating the washing machine 1, and the back surface of the housing 2 may refer to the side surface of the housing 2 that is farther from the user operating the washing machine 1.

[0084] Fig. 14 is a cross-sectional view of case lid 22 and a portion of liquid supply unit 6. As shown in Fig. 14, case 62 and liquid tanks 61A and 61B are located below case lid 22. That is, case lid 22 covers case 62 and portions of liquid tanks 61A and 61B.

[0085] When case lid 22 is closed, case lid 22 forms part of the top surface of housing 2 (see FIG. 1). Specifically, case lid 22 is located on approximately the same plane as the surrounding top surface of housing 2. With this configuration, even when case lid 22 is provided on the top surface of housing 2, the appearance quality of washing machine 1 can be improved.

[0086] When the case lid 22 is opened, the case 62 and the liquid agent tanks 61A and 61B are exposed.

[0087] Fig. 15 is a perspective view of the case lid 22. As shown in Fig. 15, the case lid 22 has two windows 23A and 23B. As shown in Figs. 14 and 15, the windows 23A and 23B are provided at positions overlapping with the windows 84 of the liquid tanks 61A and 61B, respectively, i.e., at positions overlapping with the wall portions 54 and 56 of the liquid tanks 61A and 61B, respectively. Therefore, even when the case lid 22 is closed, the user of the washing machine 1 can see the wall portions 54 and 56 of the liquid tanks 61A and 61B through the windows 23A, 23B and the window 84.

[0088] 15, windows 23A and 23B of case lid 22 are provided on first inclined surface 24 of case lid 22. First inclined surface 24 is inclined downward toward the -X side (front side). Therefore, windows 23A and 23B are inclined downward toward the -X side. The inclination direction of windows 23A and 23B is aligned with the inclination direction of window 84.

[0089] Case lid 22 further has second inclined surface 25 inclined downward toward windows 23A and 23B on the −X side of windows 23A and 23B. With this configuration, a user of washing machine 1 standing in front of housing 2 can easily see windows 23A and 23B.

[0090] 16 is an exploded view of case lid 22 of housing 2. As shown in FIG. 16, case lid 22 has a first plate 26 and a second plate 27, which are plate-like members. The lower first plate 26 faces liquid agent tanks 61A and 61B. The upper second plate 27 is disposed so as to overlap the upper surface of first plate 26 and faces the external space outside of housing 2.

[0091] 16, the first plate 26 has a first inclined surface 24 and windows 23A and 23B. The second plate 27 has an opening 28 that is wider than the windows 23A and 23B. Both windows 23A and 23B are exposed through the single opening 28. The second plate 27 further has a second inclined surface 25 in front of the opening 28.

[0092] 14, first plate 26 has a curved shape on the +X side (rear side) of windows 23A and 23B that follows protrusion 86 of tank lid 82 of liquid agent tank 61. Therefore, the gap between first plate 26 and tank lid 82 is smaller on the +X side of windows 23A and 23B than on the -X side of windows 23A and 23B. Because the gap between first plate 26 and tank lid 82 is smaller on the +X side of windows 23A and 23B, shadows are less likely to be cast on windows 23A and 23B.

[0093] On the other hand, the second plate 27 has a flat shape. Since the second plate 27 facing the space outside the housing 2 is flat, it is easy to improve the appearance quality of the housing 2.

[0094] In the first embodiment, windows 23A and 23B are through openings, but transparent members may be provided inside windows 23A and 23B. In this case, an air flow path may be provided between first plate 26 and second plate 27. With this configuration, condensation on the transparent members provided inside windows 23A and 23B can be suppressed.

[0095] In the first embodiment, windows 23A and 23B are always visible from outside housing 2, but windows 23A and 23B may be covered by other members such as shutters. When a user of washing machine 1 opens the shutters, windows 23A and 23B become visible from outside housing 2.

[0096] [summary] The above explanations are summarized to describe the features of the present disclosure.

[0097] In the washing machine 1 according to the first embodiment, the roller float structure 83 has a simple structure that omits a sensor. The roller float structure 83 has wall portions 54, 56 of different colors around the rotation axis 53. The wall portions 54, 56 each correspond to a different rotation angle around the rotation axis 53. Therefore, by checking the colors of the wall portions 54, 56 visible through the window 84, the user of the washing machine 1 can determine whether the remaining amount of agent in the liquid agent tank 61 is low.

[0098] By providing windows 23A and 23B in housing 2, wall portions 54 and 56 of roller float structure 83 can be seen from outside housing 2. Because windows 23A and 23B are provided on first inclined surface 24, the viewing angle of windows 23A and 23B is widened, and wall portions 54 and 56 can be seen regardless of the height or eye level of a user of washing machine 1.

[0099] [Effect 1] The washing machine 1 according to the first embodiment can achieve the following effects.

[0100] Washing machine 1 of embodiment 1 includes washing tub 4 and liquid agent tank 61 that stores the liquid agent to be supplied to washing tub 4. Washing machine 1 includes float portion 58 that has buoyancy with respect to the liquid agent stored in liquid agent tank 61, a movable portion that rotates in response to the elevation and lowering of float portion 58, and arm 57 that physically connects float portion 58 and the movable portion. Washing machine 1 includes window 84 that makes the movable portion visible. The movable portion rotates relative to window 84.

[0101] With this configuration, the user of the washing machine 1 can recognize the amount of rotation of the movable part through the window 84, and thus can grasp the remaining amount of liquid agent in the liquid agent tank 61 with a simple structure.

[0102] In the washing machine 1 of the first embodiment, the movable part is rotatable around a rotation axis 53 located at the top of the liquid agent tank 61. A window 84 is provided at the top of the liquid agent tank 61.

[0103] This configuration makes it easier for the user of the washing machine 1 to see the window 84.

[0104] In the washing machine 1 of the first embodiment, the movable part has a mark at a predetermined rotation angle.

[0105] With this configuration, the user of the washing machine 1 can grasp the amount of rotation of the movable part and the remaining amount of the liquid agent in the liquid agent tank 61 from the display.

[0106] In washing machine 1 of embodiment 1, the movable part has an outer peripheral surface S2 (first peripheral surface) and an outer peripheral surface S1 (second peripheral surface) adjacent to outer peripheral surface S2 around rotation shaft 53. When the amount of rotation of the movable part is equal to or less than a predetermined amount, outer peripheral surface S2 overlaps with the window, and when the amount of rotation of the movable part exceeds the predetermined amount, outer peripheral surface S1 overlaps with the window.

[0107] With this configuration, the user of the washing machine 1 can recognize the remaining amount of liquid agent in the liquid agent tank 61 by viewing the outer peripheral surfaces S1 and S2 through the window 84.

[0108] In the washing machine 1 of the first embodiment, the outer peripheral surface S2 and the outer peripheral surface S1 have different colors.

[0109] This configuration makes it easier to distinguish between the outer peripheral surfaces S1 and S2.

[0110] In washing machine 1 of the first embodiment, outer circumferential surface S2 and outer circumferential surface S1 are spaced apart from rotation shaft 53 in radial direction R that intersects with axial direction L in which rotation shaft 53 extends.

[0111] With this configuration, the amount of movement of the outer peripheral surfaces S1, S2 in the circumferential direction C can be increased for the same rotation angle compared to when there is no gap between the outer peripheral surfaces S1, S2 and the rotation axis 53. This makes it easier to see the change in posture of the movable part.

[0112] In washing machine 1 of embodiment 1, the movable part has wall portion 56 (first wall portion) that forms outer peripheral surface S2, and wall portion 54 (second wall portion) that is adjacent to wall portion 56 and forms outer peripheral surface S1. When viewed from radial direction R, end portion 46 of wall portion 56 overlaps end portion 44 of adjacent wall portion 54.

[0113] With this configuration, the distance between the wall portion 54 and the wall portion 56 can be reduced, and the outer peripheral surfaces S1 and S2 can be displayed as if they are continuous.

[0114] In the washing machine 1 of the first embodiment, when viewed from the axial direction L, the end 46 of the wall 56 forms a step 36 (first step). When viewed from the axial direction L, the end 44 of the wall 54 forms a step 34 (second step) facing the step 36.

[0115] With this configuration, when the gap T between the wall portions 54, 56 is viewed from the outside of the liquid agent tank 61, the end portion 46 is located below the gap T. Therefore, it is easy to display the outer peripheral surfaces S1, S2 as if they are continuous.

[0116] In washing machine 1 of embodiment 1, wall portion 56 and wall portion 54 are formed of separate members.

[0117] Such a configuration makes it easy to make the walls 54, 56 different colors.

[0118] In washing machine 1 of the first embodiment, wall portion 54 and rotary shaft 53 are formed by roller member 51.

[0119] With this configuration, the roller float structure 83 has a simple structure.

[0120] In washing machine 1 of the first embodiment, wall portion 56, arm 57 and floating portion 58 are formed by float member 52 that fits with roller member 51.

[0121] With this configuration, the roller float structure 83 has a simple structure.

[0122] In washing machine 1 of embodiment 1, liquid agent tank 61 has tank body 81 (main body) that stores the liquid agent, and tank lid 82 that covers the top of tank body 81. Rotating shaft 53 is provided on tank lid 82.

[0123] With this configuration, the rotating shaft 53 can be spaced above the liquid level in the liquid tank 61, and the liquid can be prevented from adhering to the rotating shaft 53.

[0124] In washing machine 1 of embodiment 1, roller member 51 further has stopper 59 protruding in radial direction R intersecting axial direction L. Tank lid 82 has wall portion 85 (contact wall portion) against which the stopper can come into contact.

[0125] Such a configuration can prevent the roller float structure 83 from rotating excessively.

[0126] In washing machine 1 of embodiment 1, float member 52 has recess 45 that fits onto rotation shaft 53 of roller member 51. When stopper 59 is in contact with wall portion 85, recess 45 opens upward toward wall portion 85.

[0127] With this configuration, the bearing portion 55 of the float member 52 becomes more likely to come off the rotation shaft 53 in the direction opposite to the wall portion 85 (+X direction).

[0128] In the washing machine 1 of the first embodiment, the floating portion 58 has a hollow cylindrical shape.

[0129] With this configuration, the fluctuation in the remaining amount can be displayed to the user through the walls 54 and 56 from a state where the liquid level in the liquid agent tank 61 is higher than when air is sealed inside.

[0130] [Effect 2] Washing machine 1 of embodiment 1 includes washing tub 4, liquid agent tank 61 that stores the liquid agent to be supplied to washing tub 4, and housing 2 that houses washing tub 4 and liquid agent tank 61. Washing machine 1 also includes float part 58 that has buoyancy with respect to the liquid agent stored in liquid agent tank 61, and a movable part that displaces in response to the elevation and lowering of float part 58. The movable part is visible from outside housing 2.

[0131] With this configuration, the user of the washing machine 1 can know the remaining amount of the liquid agent in the liquid agent tank 61 from outside the housing 2.

[0132] Washing machine 1 of the first embodiment includes arm 57 that physically connects floating part 58 and the movable part.

[0133] With this configuration, the arm 57 can transmit the lifting and lowering movement of the floating part 58 to the movable part.

[0134] In washing machine 1 of the first embodiment, housing 2 is provided with windows 23A and 23B that allow the moving parts to be seen.

[0135] With this configuration, the user of the washing machine 1 can recognize the remaining amount of liquid agent in the liquid agent tank 61 from outside the housing 2 by recognizing the movable parts through the windows 23A and 23B.

[0136] In washing machine 1 of the first embodiment, windows 23A and 23B are provided in housing 2 at positions overlapping with the movable part.

[0137] Such a configuration makes it easy to recognize the moving parts through the windows 23A and 23B.

[0138] Washing machine 1 of embodiment 1 includes case 62 that houses liquid agent tank 61. Housing 2 has openable case lid 22 that covers case 62, and case lid 22 is provided with windows 23A and 23B.

[0139] This configuration makes it easier to provide the windows 23A and 23B at positions that overlap the movable portion.

[0140] In washing machine 1 of embodiment 1, case lid 22 forms a part of the top surface of housing 2.

[0141] This configuration allows the user of the washing machine 1 to easily see the windows 23A and 23B.

[0142] In washing machine 1 of the first embodiment, windows 23A and 23B provided in case lid 22 are inclined downward toward the front side.

[0143] This configuration makes it easier for a user of the washing machine 1 standing in front of the washing machine 1 to see windows 23A and 23B.

[0144] In washing machine 1 of the first embodiment, case lid 22 has second inclined surface 25 (inclined surface) that slopes downward from front surface 2A toward windows 23A and 23B.

[0145] This configuration makes it easier for a user of the washing machine 1 standing in front of the washing machine 1 to see windows 23A and 23B.

[0146] In the washing machine 1 of the first embodiment, the case lid 22 has a first plate 26 facing the liquid agent tank 61, and a second plate 27 overlapping the first plate 26 and facing the external space outside the housing.

[0147] With this configuration, the strength of case lid 22 is improved by forming it from two plates. Also, second plate 27, which is visible from the outside, can be made flat to improve the appearance quality of washing machine 1, while first plate 26 can be provided with inclined surfaces 24, 25.

[0148] In the washing machine 1 of the first embodiment, the first plate 26 has a shape that follows the liquid agent tank 61 behind the movable part.

[0149] With this configuration, first plate 26 is less likely to cast a shadow on windows 23A and 23B compared to when first plate 26 is located away from liquid agent tank 61.

[0150] The present disclosure is not limited to the first embodiment, and can be embodied in various other forms. The roller float structure 83 and the movable part are not limited to the first embodiment, and may have any structure.

[0151] In the first embodiment, the liquid supply unit 6 has two liquid tanks 61A and 61B. However, the present invention is not limited to this. The liquid supply unit 6 may have a single liquid tank having a larger volume than the liquid tanks 61A and 61B, instead of the liquid tanks 61A and 61B. The liquid supply unit 6 may also have the liquid tanks 61A and 61B interchangeably with a single liquid tank. When the liquid supply unit 6 has a single liquid tank, the first plate 26 of the case lid 22 may have only one of the window 23A and the window 23B. When the depth of the single liquid tank varies in the Y direction, a roller float structure 83 may be provided on the deeper side. This configuration can prevent the float portion 58 from adhering to the bottom surface of the liquid tank.

[0152] In the first embodiment, the roller member 51 and the float member 52 are separate members, but the present invention is not limited to this. The roller member 51 and the float member 52 may be integrally formed.

[0153] In the first embodiment, the roller float structure 83 is attached to the tank lid 82, but the present invention is not limited to this. For example, the roller float structure 83 may be attached to the top of the tank body 81.

[0154] In the first embodiment, an example has been described in which the rotation axis 53 of the roller float structure 83 extends in the Y direction and the floating portion 58 moves in the -X direction as the liquid level drops, but this is not limiting. The roller float structure 83 may be provided so that the floating portion 58 moves in the +X direction as the liquid level drops. Alternatively, the roller float structure 83 may be provided so that the rotation axis 53 extends in the X direction.

[0155] In the first embodiment, the window 84, and the windows 23A and 23B are opened obliquely upward, but the present invention is not limited to this. The window 84, and the windows 23A and 23B may be opened upward or forward.

[0156] In the first embodiment, the roller float structure 83 has two outer peripheral surfaces S1 and S2, each of which has a different color, but this is not limiting. The outer peripheral surfaces S1 and S2, i.e., the wall portions 54 and 56, may be integral. Furthermore, the roller member 51 and the float member 52 may be integral.

[0157] In the first embodiment, an example in which the "low remaining amount indicator" is provided by different colors on the outer peripheral surfaces S1, S2 has been described, but this is not limiting. The movable part may have an indication at a rotation angle corresponding to the low remaining amount state. Specifically, the movable part may have an indication on the peripheral surface portion that overlaps with the window 84 in the low remaining amount state. For example, the movable part may have a scale, line, or arrow printed at a position corresponding to the gap T. For example, if an arrow is provided at a position corresponding to the gap T, the words "EMPTY" and "FULL" may be printed one above the other on the tank lid 82 on one side of the window 84 in the Y direction. At different rotation angles of the roller float structure 83, the arrow points to the words "EMPTY" and "FULL," respectively.

[0158] In the first embodiment, the case lid 22 of the housing 2 has the windows 23A and 23B, but the present invention is not limited to this. The liquid agent tanks 61A and 61B may be exposed from the housing 2 or may be removable from the housing 2.

[0159] In the first embodiment, the case where the windows 84 of the liquid reservoirs 61A, 61B are provided on the top surfaces of the liquid reservoirs 61A, 61B has been described, but the present invention is not limited to this. For example, the windows 84 may be provided on the front surface or another side surface of the liquid reservoirs 61A, 61B.

[0160] In the first embodiment, the floating portion 58 has been described as having a hollow cylindrical shape, but the present invention is not limited to this. The floating portion 58 may have another shape that penetrates in the axial direction L. The floating portion 58 may also have a sealed structure that seals air or the like inside.

[0161] In the first embodiment, the movable portion made up of the walls 54, 56 rotates in response to the rise and fall of the liquid level, but the present invention is not limited to this. The movable portion may be displaced in any manner in response to the rise and fall of the liquid level, for example, may be displaced in a straight line.

[0162] In the first embodiment, the liquid agent tanks 61A and 61B are liquid agent tanks provided in the washing machine 1, but the present invention is not limited to this. For example, the liquid agent tanks 61A and 61B may be provided in other cleaning devices such as a dishwasher. In this case, the liquid agent stored in the liquid agent tanks 61A and 61B is supplied to a storage tank that stores an object to be cleaned.

[0163] The washing machine in the first aspect includes a washing tub, a liquid agent tank for storing the liquid agent to be supplied to the washing tub, a floating part having buoyancy relative to the liquid agent stored in the liquid agent tank, a movable part that rotates in response to the rising and falling of the floating part, an arm that physically connects the floating part and the movable part, and a window that makes the movable part visible, and the movable part rotates relative to the window.

[0164] In the second aspect of the washing machine, the movable part of the washing machine in the first aspect is rotatable around a rotation axis located at the top of the liquid agent tank, and the window is provided at the top of the liquid agent tank.

[0165] As a washing machine according to a third aspect, in the washing machine according to the second aspect, the movable part has an indication at a predetermined rotation angle.

[0166] As a washing machine in the fourth aspect, in the washing machine in the second or third aspect, the movable part has a first peripheral surface and a second peripheral surface adjacent to the first peripheral surface around the rotation axis, and when the amount of rotation of the movable part is less than a predetermined amount, the first peripheral surface overlaps with the window, and when the amount of rotation of the movable part exceeds the predetermined amount, the second peripheral surface overlaps with the window.

[0167] A fifth aspect of the washing machine is the washing machine of the fourth aspect, wherein the first and second circumferential surfaces have different colors.

[0168] As a washing machine in the sixth aspect, in the washing machine in the fourth or fifth aspect, each of the first circumferential surface and the second circumferential surface has a radial gap with respect to the rotation axis that intersects with the axial direction in which the rotation axis extends.

[0169] As a washing machine in a seventh aspect, in a washing machine in any of the fourth to sixth aspects, the movable part has a first wall portion forming a first circumferential surface and a second wall portion adjacent to the first wall portion and forming a second circumferential surface, and when viewed from a radial direction intersecting the axial direction in which the rotation axis extends, the end of the first wall portion overlaps with the end of the adjacent second wall portion.

[0170] As a washing machine in the eighth aspect, in the washing machine in the seventh aspect, when viewed from the axial direction, the end of the first wall portion forms a first step, and when viewed from the axial direction, the end of the second wall portion forms a second step facing the first step.

[0171] A ninth aspect of the invention relates to the washing machine of the seventh or eighth aspect, wherein the first wall portion and the second wall portion are formed of separate members.

[0172] In a tenth aspect of the washing machine, in the ninth aspect, the second wall portion and the rotation shaft are formed by roller members.

[0173] As a washing machine in an eleventh aspect, in the washing machine in the tenth aspect, the first wall portion, the arm, and the floating portion are formed by a float member that fits with the roller member.

[0174] As a washing machine in a twelfth aspect, in the washing machine in the eleventh aspect, the liquid agent tank has a main body in which the liquid agent is stored and a tank lid that covers the top of the main body, and the rotating shaft is provided on the tank lid.

[0175] A thirteenth aspect of the washing machine is the washing machine of the twelfth aspect, wherein the roller member further has a stopper protruding radially in a direction intersecting the axial direction, and the tank lid has an abutment wall portion against which the stopper can abut.

[0176] As a washing machine in the 14th aspect, in the washing machine in the 13th aspect, the float member has a recess that fits with the rotation axis of the roller member, and when the stopper is in contact with the abutment wall portion, the recess opens toward and upwardly towards the abutment wall portion.

[0177] A fifteenth aspect of the washing machine is the washing machine according to any one of the first to fourteenth aspects, wherein the floating portion has a hollow cylindrical shape.

[0178] The cleaning device in the sixteenth aspect includes a storage tank, a liquid tank for storing the liquid to be supplied to the storage tank, a floating part having buoyancy relative to the liquid stored in the liquid tank, a movable part that rotates in response to the rising and falling of the floating part, an arm that physically connects the floating part and the movable part, and a window that makes the movable part visible, and the movable part rotates relative to the window.

[0179] The liquid tank in the seventeenth aspect is a liquid tank for storing a liquid, and is provided with a floating part that has buoyancy with respect to the stored liquid, a movable part that rotates in response to the rising and falling of the floating part, an arm that physically connects the floating part and the movable part, and a window that makes the movable part visible, and the movable part rotates relative to the window.

[0180] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Industrial Applicability]

[0181] When the washing machine of the present disclosure is equipped with an automatic liquid dispensing function, the user can visually check the remaining amount of liquid in the liquid tank, making it useful as a home washing machine, a commercial washing machine, or any type of washer-dryer. [Explanation of symbols]

[0182] 1 washing machine 2. Case 3 Outer tank 4 Washing machine 6 Fluid supply unit 22 Case lid 23A Window 23B Window 24 1st slope 25 Second slope 26 1st board 27 2nd board 61A Fluid Tank 61B Fluid Tank 62 cases 51 Roller member 52 Float member 53 Rotation axis 54 Wall 55 Bearing section 56 Wall 57 Arm 58 Float 59 Stopper 81 Tank body 82 Tank lid 83 Roller float structure S1 outer surface S2 outer surface T-gap

Claims

1. A washing machine and A liquid agent tank in which the liquid agent to be supplied to the washing tub is stored; a float portion having buoyancy relative to the liquid stored in the liquid tank; a movable part that rotates in response to the elevation and lowering of the floating part; an arm that physically connects the floating portion and the movable portion; a window that allows the movable part to be viewed, The washing machine, wherein the movable part rotates relative to the window.

2. the movable part is rotatable around a rotation axis located at an upper part of the liquid agent tank, The washing machine according to claim 1 , wherein the window is provided in an upper portion of the liquid agent tank.

3. The washing machine according to claim 2 , wherein the movable part has an indication at a predetermined rotation angle.

4. the movable portion has a first circumferential surface and a second circumferential surface adjacent to the first circumferential surface around the rotation axis, 3. The washing machine according to claim 2, wherein when the amount of rotation of the movable part is equal to or less than a predetermined amount, the first circumferential surface overlaps with the window, and when the amount of rotation of the movable part exceeds the predetermined amount, the second circumferential surface overlaps with the window.

5. The washing machine of claim 4, wherein the first and second circumferential surfaces have different colors.

6. The washing machine according to claim 4 , wherein the first circumferential surface and the second circumferential surface are spaced apart from the rotation shaft in a radial direction intersecting an axial direction along which the rotation shaft extends.

7. the movable portion has a first wall portion that forms the first circumferential surface, and a second wall portion that is adjacent to the first wall portion and forms the second circumferential surface, The washing machine according to claim 4, wherein an end of the first wall portion overlaps an end of the adjacent second wall portion when viewed from a radial direction intersecting an axial direction in which the rotation shaft extends.

8. When viewed in the axial direction, an end of the first wall portion forms a first step, The washing machine according to claim 7 , wherein an end of the second wall portion forms a second step facing the first step when viewed from the axial direction.

9. The washing machine according to claim 7, wherein the first wall portion and the second wall portion are formed of separate members.

10. The washing machine according to claim 9, wherein the second wall portion and the rotation shaft are formed by roller members.

11. The washing machine according to claim 10, wherein the first wall portion, the arm, and the floating portion are formed by a float member that fits with the roller member.

12. the liquid agent tank has a main body in which the liquid agent is stored and a tank lid that covers an upper portion of the main body, The washing machine according to claim 11, wherein the rotation shaft is provided on the tank lid.

13. The roller member further includes a stopper protruding in a radial direction intersecting the axial direction, The washing machine according to claim 12, wherein the tank lid has an abutment wall portion against which the stopper can abut.

14. the float member has a recess that fits onto the rotation shaft of the roller member, The washing machine according to claim 13, wherein the recessed portion opens upward toward the abutment wall portion when the stopper is in abutment with the abutment wall portion.

15. The washing machine according to claim 1 , wherein the float portion has a hollow cylindrical shape.

16. A storage tank; a liquid tank for storing the liquid to be supplied to the storage tank; a float portion having buoyancy relative to the liquid stored in the liquid tank; a movable part that rotates in response to the elevation and lowering of the floating part; an arm that physically connects the floating portion and the movable portion; a window that allows the movable part to be viewed, The cleaning device, wherein the movable part rotates relative to the window.

17. A liquid agent tank for storing a liquid agent, a float portion having buoyancy relative to the stored liquid; a movable part that rotates in response to the elevation and lowering of the floating part; an arm that physically connects the floating portion and the movable portion; a window that allows the movable part to be viewed, The movable part rotates relative to the window.

Images