Bathtub equipment

Abstract

To provide a bathtub device that makes it easy to clean the armrest area. [Solution] A bathtub cleaning device comprising a bathtub having a bottom and side surfaces, and a bathtub cleaning device having a spray nozzle, wherein the side surfaces have a first side surface, a second side surface, a third side surface, and a fourth side surface, and the first side surface has a first lower vertical surface, a first armrest surface, and a first upper vertical surface, and the width of the first armrest surface in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the first armrest surface increases.

Description

[Technical Field]

[0001] Aspects of the present invention generally relate to bathtub apparatus. [Background Art]

[0002] There is a bathtub apparatus including a bathtub and a bathtub cleaning device provided on a bottom surface of the bathtub. In such a bathtub apparatus, the bathtub is cleaned by injecting water or the like from an injection port of the bathtub cleaning device toward a side surface of the bathtub or the like. However, when an armrest portion is provided on the side surface of the bathtub, if the width of the armrest portion is too wide at a position away from the injection port, the armrest portion may become difficult to clean. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2022-41280 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Aspects of the present invention have been made based on recognition of such a problem, and an object of the invention is to provide a bathtub apparatus that facilitates cleaning of an armrest portion. [Means for Solving the Problem]

[0005] The first invention comprises a bathtub having a bottom surface and side surfaces extending upward from the outer peripheral end of the bottom surface, and a bathtub cleaning device having a nozzle provided on the bottom surface for spraying water toward the side surfaces, wherein the side surfaces include a first side surface extending in the front-rear direction, a second side surface extending in the front-rear direction and facing the first side surface, a third side surface connecting one end of the first side surface and one end of the second side surface, and a fourth side surface connecting the other end of the first side surface and the other end of the second side surface. The bathtub device has a section and a first side section, the first side section having a first lower vertical section extending upward from the outer peripheral end of the bottom section, a first armrest section extending upward and outward from the upper end of the first lower vertical section, and a first upper vertical section extending upward from the upper end of the first armrest section, wherein the width of the first armrest section in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the first armrest section increases.

[0006] According to this bathtub device, as the horizontal distance between the nozzle and the upper end of the first armrest increases, the width of the first armrest in the left-right direction decreases. This makes it possible to make the width of the first armrest smaller in the left-right direction at positions where the horizontal distance between the nozzle and the upper end of the first armrest is large (i.e., positions far from the nozzle), where the water velocity tends to slow down, than in positions where the horizontal distance between the nozzle and the upper end of the first armrest is small (i.e., positions close to the nozzle), where the water velocity does not slow down as easily. As a result, the first armrest can be easily cleaned even at positions far from the nozzle where the water velocity tends to slow down.

[0007] The second invention is a bathtub device in which, in the first invention, the rate of reduction in the width of the first armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the first armrest portion increases.

[0008] According to this bathtub device, as the horizontal distance between the spray nozzle and the upper end of the first armrest increases, the rate of decrease in the width of the first armrest in the left-right direction increases, which prevents the width of the first armrest from becoming too shallow and makes it easier to rest your arms on the first armrest.

[0009] The third invention is a bathtub device in which, in the first or second invention, the second side surface portion has a second lower vertical surface portion extending upward from the outer peripheral end of the bottom surface portion, a second armrest portion extending upward and toward the outside of the bathtub from the upper end of the second lower vertical surface portion, and a second upper vertical surface portion extending upward from the upper end of the second armrest portion, wherein the width of the second armrest portion in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases.

[0010] With this bathtub device, as the horizontal distance between the spray nozzle and the upper end of the second armrest increases, the width of the second armrest in the left-right direction decreases. This makes it possible to make the width of the second armrest smaller in the left-right direction at positions where the horizontal distance between the spray nozzle and the upper end of the second armrest is large (i.e., positions far from the spray nozzle), where the water velocity tends to slow down, than in positions where the horizontal distance between the spray nozzle and the upper end of the second armrest is small (i.e., positions close to the spray nozzle), where the water velocity does not slow down as easily. As a result, the second armrest can be easily cleaned even at positions far from the spray nozzle where the water velocity tends to slow down.

[0011] The fourth invention is a bathtub device in which, in the third invention, the rate of reduction in the width of the second armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases.

[0012] According to this bathtub device, as the horizontal distance between the spray nozzle and the upper end of the second armrest increases, the rate of decrease in the width of the second armrest in the left-right direction increases, which prevents the width of the second armrest from becoming too shallow and makes it easier to rest your arms on the second armrest. [Effects of the Invention]

[0013] According to an aspect of the present invention, a bathtub device is provided that makes it easy to clean the armrest portion. [Brief explanation of the drawing]

[0014] [Figure 1] This is a plan view showing a bathtub device according to an embodiment. [Figure 2] This is a cross-sectional view showing a bathtub device according to an embodiment. [Figure 3] This is a cross-sectional view showing a bathtub device according to an embodiment. [Figure 4] This is a cross-sectional view showing a bathtub device according to an embodiment. [Figure 5] This is an explanatory diagram illustrating the effects of the bathtub device according to the embodiment. [Modes for carrying out the invention]

[0015] Embodiments of the present invention will be described below with reference to the drawings. In each drawing, similar components are denoted by the same reference numerals, and detailed descriptions are omitted as appropriate.

[0016] Figure 1 is a plan view showing a bathtub device according to an embodiment. As shown in Figure 1, the bathtub device 500 according to this embodiment includes, for example, a bathtub 100 and a bathtub cleaning device 200.

[0017] The bathtub 100 is installed, for example, on the floor of the bathroom. The bathtub 100 is, for example, a roughly rectangular box shape and is open to the top. The bathtub 100 has a horizontally elongated shape with a long side and a short side when viewed from above.

[0018] The bathtub 100 includes a bottom surface portion 10, a side surface portion 20, and a rim portion 30. The bottom surface portion 10 is located at a lower portion of the bathtub 100 and constitutes a bottom surface of the bathtub 100. The bottom surface portion 10 is provided with a drain outlet 11 for draining water accumulated inside the bathtub 100 (that is, inside the space surrounded by the bottom surface portion 10, the side surface portion 20, and the rim portion 30). The side surface portion 20 extends upward from an outer peripheral edge 10a of the bottom surface portion 10. The rim portion 30 extends outward from an upper end 20a of the side surface portion 20.

[0019] The side surface portion 20 includes a first side surface portion 21, a second side surface portion 22, a third side surface portion 23, and a fourth side surface portion 24. The first side surface portion 21 and the second side surface portion 22 extend in the front-rear direction. The second side surface portion 22 faces the first side surface portion 21. In the bathtub apparatus 500, when viewed from above, the second side surface portion 22 is inclined relative to the first side surface portion 21, for example. That is, in the bathtub apparatus 500, when viewed from above, the second side surface portion 22 is not parallel to the first side surface portion 21. When viewed from above, the second side surface portion 22 may be parallel to the first side surface portion 21. The third side surface portion 23 connects one end (rear end) 21p of the first side surface portion 21 and one end (rear end) 22p of the second side surface portion 22. The fourth side surface portion 24 connects the other end (front end) 21q of the first side surface portion 21 and the other end (front end) 22q of the second side surface portion 22. The fourth side surface portion 24 faces the third side surface portion 23. The first side surface portion 21 and the second side surface portion 22 are side surface portions extending in the longitudinal direction. The third side surface portion 23 and the fourth side surface portion 24 are side surface portions extending in the transverse direction.

[0020] Herein, in the present specification, from the perspective of a bather whose back is in contact with the third side surface portion 23, upward is referred to as "upper", downward is referred to as "lower", front is referred to as "front", rear is referred to as "rear", right is referred to as "right", and left is referred to as "left".

[0021] The rim portion 30 includes a first rim portion 31, a second rim portion 32, a third rim portion 33, and a fourth rim portion 34. The first rim portion 31 extends from the upper end of the first side surface portion 21 toward the outside (left side) of the bathtub 100. The second rim portion 32 extends from the upper end of the second side surface portion 22 toward the outside (right side) of the bathtub 100. The third rim portion 33 extends from the upper end of the third side surface portion 23 toward the outside (rear side) of the bathtub 100. The fourth rim portion 34 extends from the upper end of the fourth side surface portion 24 toward the outside (front side) of the bathtub 100. The first rim portion 31 and the second rim portion 32 are rim portions extending in the longitudinal direction. The third rim portion 33 and the fourth rim portion 34 are rim portions extending in the lateral direction.

[0022] In the bathtub apparatus 500, the first side surface portion 21 and the first rim portion 31 are located on the wall side of the bathroom, and the second side surface portion 22 and the second rim portion 32 are located on the washing floor side of the bathroom. Alternatively, the first side surface portion 21 and the first rim portion 31 may be located on the washing floor side of the bathroom, and the second side surface portion 22 and the second rim portion 32 may be located on the wall side of the bathroom. Furthermore, in the bathtub apparatus 500, the third side surface portion 23 and the third rim portion 33 are located on the back side, and the fourth side surface portion 24 and the fourth rim portion 34 are located on the leg side. Alternatively, the third side surface portion 23 and the third rim portion 33 may be located on the leg side, and the fourth side surface portion 24 and the fourth rim portion 34 may be located on the back side.

[0023] The bathtub cleaning device 200 is installed on the bottom surface 10 of the bathtub 100. The bathtub cleaning device 200 has a nozzle 210 that sprays water. The nozzle 210 sprays water toward the side surfaces 20 and rim 30 of the bathtub 100. The nozzle 210 may also spray detergent or the like toward the side surfaces 20 and rim 30 of the bathtub 100. For example, the bathtub can be cleaned by spraying detergent or water from the nozzle 210 while the top of the bathtub 100 is covered with a bath cover (not shown). The nozzle 210 may, for example, spray water or the like simultaneously toward the side surfaces 20 and rim 30 in all directions, or it may spray water or the like in one direction while rotating clockwise or counterclockwise in a top view to continuously spray water or the like toward the side surfaces 20 and rim 30 in all directions. In addition, the nozzle 210 may spray water or the like in a linear pattern, or in a fan pattern. For example, when an operation input for bathtub cleaning is received via a remote control (not shown) installed inside or outside the bathroom, the bathtub cleaning device 200 starts cleaning the bathtub.

[0024] Figures 2 to 4 are cross-sectional views showing a bathtub apparatus according to an embodiment. Figure 2 is a cross-sectional view along the line II-II shown in Figure 1. Figure 3 is a cross-sectional view taken along the line III-III shown in Figure 1. Figure 4 is a cross-sectional view along the line IV-IV shown in Figure 1.

[0025] As shown in Figures 2 to 4, the bottom surface 10 includes, for example, a portion that extends linearly in a cross-section along the left-right direction passing through the nozzle 210 (Figure 2) and a cross-section along the front-rear direction passing through the nozzle 210 (Figure 4). The bottom surface 10 is inclined toward, for example, the drain port 11. The bottom surface 10 may also include a curved portion in, for example, a cross-section along the left-right direction passing through the nozzle 210 (Figure 2) and a cross-section along the front-rear direction passing through the nozzle 210 (Figure 4).

[0026] As shown in Figures 2 and 3, the first side portion 21 has a first lower vertical portion 21a, a first armrest portion 21b, and a first upper vertical portion 21c. The first lower vertical portion 21a extends upward from the outer peripheral end 10a of the bottom portion 10 and is connected to the first armrest portion 21b. The first armrest portion 21b extends upward from the upper end of the first lower vertical portion 21a and outward (to the left) of the bathtub 100 and is connected to the first upper vertical portion 21c. The first upper vertical portion 21c extends upward from the upper end 21z of the first armrest portion 21b and is connected to the first rim portion 31.

[0027] At the point where the first lower vertical section 21a and the first armrest section 21b are connected, for example, the rate of change in the inclination angle changes. That is, the lower end 21x of the first armrest section 21b is, for example, a position where the rate of change in the inclination angle changes. Also, at the point where the first armrest section 21b and the first upper vertical section 21c are connected, for example, the rate of change in the inclination angle changes. That is, the upper end 21z of the first armrest section 21b is, for example, a position where the rate of change in the inclination angle changes.

[0028] The first lower vertical surface portion 21a has a curved portion 21a1 and an upward-extending portion 21a2. The curved portion 21a1 curves upward from the outer peripheral end 10a of the bottom surface portion 10 and is connected to the upward-extending portion 21a2. The upward-extending portion 21a2 extends upward from the upper end of the curved portion 21a1 and is connected to the first armrest portion 21b. The lower end of the curved portion 21a1 corresponds to the lower end of the first lower vertical surface portion 21a. The lower end of the first lower vertical surface portion 21a corresponds to the lower end of the first side surface portion 21. The upper end of the upward-extending portion 21a2 corresponds to the upper end of the first lower vertical surface portion 21a. In the bathtub device 500, the upward-extending portion 21a2 is inclined outward (to the left) as it extends upward. The upward-extending portion 21a2 does not have to be inclined. The upward extension portion 21a2 includes, for example, a portion that extends linearly in a cross-section (Figure 2) that passes through the injection nozzle 210 along the left-right direction.

[0029] The first armrest portion 21b has an inner curved portion 21b1 and an outer curved portion 21b2. The inner curved portion 21b1 curves outward (to the left) from the upper end of the first lower vertical portion 21a and is connected to the outer curved portion 21b2. The outer curved portion 21b2 curves upward from the upper end of the inner curved portion 21b1 and is connected to the first upper vertical portion 21c. The outer curved portion 21b2 constitutes the inward angle of the first armrest portion 21b. The lower end of the inner curved portion 21b1 corresponds to the lower end 21x of the first armrest portion 21b. The lower end 21x of the first armrest portion 21b corresponds to the upper end of the first lower vertical portion 21a. The upper end of the outer curved portion 21b2 corresponds to the upper end 21z of the first armrest portion 21b. The upper end 21z of the first armrest portion 21b corresponds to the lower end of the first upper vertical portion 21c. Furthermore, the first armrest portion 21b may have an extended portion that extends outward (to the left) between the inner curved portion 21b1 and the outer curved portion 21b2. In this case, the extended portion may include a portion that extends linearly in a cross-section (Figure 2) that passes through the spray nozzle 210 along the left-right direction. Also, as shown in Figure 4, in the bathtub device 500, the first armrest portion 21b is inclined downward as it moves towards the rear. The first armrest portion 21b does not have to be inclined.

[0030] The first upper vertical section 21c extends upward from the upper end 21z of the first armrest section 21b and is connected to the first rim section 31. The upper end of the first upper vertical section 21c corresponds to the upper end of the first side section 21. In the bathtub device 500, the first upper vertical section 21c is inclined outward (to the left) as it extends upward. The first upper vertical section 21c does not have to be inclined. The first upper vertical section 21c includes, for example, a portion that extends linearly in a cross-section (Figure 2) that passes through the spray nozzle 210 along the left-right direction.

[0031] The first rim portion 31 is curved outward (to the left) from the upper end of the first side portion 21. The lower end of the first rim portion 31 corresponds to the upper end of the first side portion 21. The first rim portion 31 may have an extended portion that extends further outward (to the left) from the curved portion. The first rim portion 31 may include a portion that extends in a straight line in a cross-section (Figure 2) that passes through the nozzle 210 along the left-right direction.

[0032] As shown in Figures 2 and 3, the second side portion 22 has a second lower vertical portion 22a, a second armrest portion 22b, and a second upper vertical portion 22c. The second lower vertical portion 22a extends upward from the outer peripheral end 10a of the bottom portion 10 and is connected to the second armrest portion 22b. The second armrest portion 22b extends upward from the upper end of the second lower vertical portion 22a and outward (to the right) of the bathtub 100 and is connected to the second upper vertical portion 22c. The second upper vertical portion 22c extends upward from the upper end 22z of the second armrest portion 22b and is connected to the second rim portion 32.

[0033] At the point where the second lower vertical section 22a and the second armrest section 22b are connected, for example, the rate of change in the inclination angle changes. In other words, the lower end 22x of the second armrest section 22b is, for example, a position where the rate of change in the inclination angle changes. Also, at the point where the second armrest section 22b and the second upper vertical section 22c are connected, for example, the rate of change in the inclination angle changes. In other words, the upper end 22z of the second armrest section 22b is, for example, a position where the rate of change in the inclination angle changes.

[0034] The second armrest portion 22b and the second upper vertical portion 22c may be provided as needed or omitted. If the second armrest portion 22b and the second upper vertical portion 22c are omitted, the second lower vertical portion 22a is connected to the second rim portion 32.

[0035] The second lower vertical surface portion 22a has a curved portion 22a1 and an upward-extending portion 22a2. The curved portion 22a1 curves upward from the outer peripheral end 10a of the bottom surface portion 10 and is connected to the upward-extending portion 22a2. The upward-extending portion 22a2 extends upward from the upper end of the curved portion 22a1 and is connected to the second armrest portion 22b. The lower end of the curved portion 22a1 corresponds to the lower end of the second lower vertical surface portion 22a. The lower end of the second lower vertical surface portion 22a corresponds to the lower end of the second side surface portion 22. The upper end of the upward-extending portion 22a2 corresponds to the upper end of the second lower vertical surface portion 22a. In the bathtub device 500, the upward-extending portion 22a2 is inclined outward (to the right) as it extends upward. The upward-extending portion 21a2 does not need to be inclined. The upward extension portion 22a2 includes, for example, a portion that extends linearly in a cross-section (Figure 2) that passes through the injection nozzle 210 along the left-right direction.

[0036] The second armrest portion 22b has an inner curved portion 22b1 and an outer curved portion 22b2. The inner curved portion 22b1 curves outward (to the right) from the upper end of the second lower vertical portion 22a and is connected to the outer curved portion 22b2. The outer curved portion 22b2 curves upward from the upper end of the inner curved portion 22b1 and is connected to the second upper vertical portion 22c. The outer curved portion 22b2 constitutes the inward angle of the second armrest portion 22b. The lower end of the inner curved portion 22b1 corresponds to the lower end 22x of the second armrest portion 22b. The lower end 22x of the second armrest portion 22b corresponds to the upper end of the second lower vertical portion 22a. The upper end of the outer curved portion 22b2 corresponds to the upper end 22z of the second armrest portion 22b. The upper end 22z of the second armrest portion 22b corresponds to the lower end of the second upper vertical portion 22c. The second armrest portion 22b may have an extended portion that extends outward (to the right) between the inner curved portion 22b1 and the outer curved portion 22b2. In this case, the extended portion may include a portion that extends linearly in a cross-section (Figure 2) that passes through the spray nozzle 210 along the left-right direction. In addition, in the bathtub device 500, the second armrest portion 22b is inclined, for example, downward as it moves towards the rear. The second armrest portion 22b does not have to be inclined.

[0037] The second upper vertical section 22c extends upward from the upper end 22z of the second armrest section 22b and is connected to the second rim section 32. The upper end of the second upper vertical section 22c corresponds to the upper end of the second side section 22. In the bathtub device 500, the second upper vertical section 22c is inclined outward (to the right) as it extends upward. The second upper vertical section 22c does not have to be inclined. The second upper vertical section 22c includes, for example, a portion that extends linearly in a cross-section (Figure 2) that passes through the spray nozzle 210 along the left-right direction.

[0038] The second rim portion 32 curves outward (to the right) from the upper end of the second side portion 22. The lower end of the second rim portion 32 corresponds to the upper end of the second side portion 22. The second rim portion 32 may have an extended portion that extends further outward (to the right) from the curved portion. The second rim portion 32 may include a portion that extends linearly in a cross-section (Figure 2) that passes through the nozzle 210 along the left-right direction.

[0039] As shown in Figure 4, the third side portion 23 has a curved portion 23a and an upward-extending portion 23b. The curved portion 23a curves upward from the outer peripheral end 10a of the bottom portion 10 and is connected to the upward-extending portion 23b. The upward-extending portion 23b extends upward from the upper end of the curved portion 23a and is connected to the third rim portion 33. The lower end of the curved portion 23a corresponds to the lower end of the third side portion 23. The upper end of the upward-extending portion 23b corresponds to the upper end of the third side portion 23. In the bathtub device 500, the upward-extending portion 23b is inclined outward (rearward) as it extends upward. The upward-extending portion 23b does not have to be inclined. The upward-extending portion 23b includes, for example, a portion that extends linearly in a cross section (Figure 4) along the front-rear direction and passing through the spray nozzle 210.

[0040] The third rim portion 33 is curved outward (rearward) from the upper end of the third side portion 23. The lower end of the third rim portion 33 corresponds to the upper end of the third side portion 23. The third rim portion 33 may have an extended portion that extends further outward (rearward) from the curved portion. The third rim portion 33 may include a portion that extends linearly in a cross section (Figure 4) along the front-rear direction and passing through the nozzle 210.

[0041] As shown in Figure 4, the fourth side portion 24 has a curved portion 24a and an upward-extending portion 24b. The curved portion 24a curves upward from the outer peripheral end 10a of the bottom portion 10 and is connected to the upward-extending portion 24b. The upward-extending portion 24b extends upward from the upper end of the curved portion 24a and is connected to the fourth rim portion 34. The lower end of the curved portion 24a corresponds to the lower end of the fourth side portion 24. The upper end of the upward-extending portion 24b corresponds to the upper end of the fourth side portion 24. In the bathtub device 500, the upward-extending portion 24b is inclined outward (forward) as it extends upward. The upward-extending portion 24b does not have to be inclined. The upward-extending portion 24b includes, for example, a portion that extends linearly in a cross-section (Figure 4) along the front-rear direction and passing through the spray nozzle 210.

[0042] The fourth rim portion 34 is curved outward (forward) from the upper end of the fourth side portion 24. The lower end of the fourth rim portion 34 corresponds to the upper end of the fourth side portion 24. The fourth rim portion 34 may have an extended portion that extends further outward (forward) from the curved portion. The fourth rim portion 34 may include a portion that extends linearly in a cross section (Figure 4) along the front-rear direction and passing through the nozzle 210.

[0043] As shown in Figure 1, in a top view, the width of the first armrest portion 21b in the left-right direction decreases as the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b increases. As shown in Figure 1, the horizontal distance D1b between the nozzle 210 and the upper end 21z of the first armrest portion 21b at the cross-sectional position shown in Figure 3 is smaller than the horizontal distance D1a between the nozzle 210 and the upper end 21z of the first armrest portion 21b at the cross-sectional position shown in Figure 2. Furthermore, the width W1b of the first armrest portion 21b in the left-right direction at the cross-sectional position shown in Figure 3 is smaller than the width W1a of the first armrest portion 21b in the left-right direction at the cross-sectional position shown in Figure 2. In other words, the width of the first armrest portion 21b in the left-right direction decreases as it moves away from the nozzle 210.

[0044] In the bathtub device 500, the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b is minimum at the position shown in the cross-section in Figure 2. Furthermore, the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b increases as you move forward from the position shown in the cross-section in Figure 2. Furthermore, the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b increases as you move backward from the position shown in the cross-section in Figure 2. The width of the first armrest portion 21b in the left-right direction is maximum at the position shown in the cross-section in Figure 2. Furthermore, the width of the first armrest portion 21b in the left-right direction decreases as you move forward from the position shown in the cross-section in Figure 2. Furthermore, the width of the first armrest portion 21b in the left-right direction decreases as you move backward from the position shown in the cross-section in Figure 2.

[0045] As shown in Figures 2 and 3, the left-right width of the first armrest portion 21b is the left-right distance between the lower end 21x and the upper end 21z of the first armrest portion 21b in a cross-section along the left-right direction. The left-right width W1a of the first armrest portion 21b at the position of the cross-section shown in Figure 2 is the left-right distance between the lower end 21x and the upper end 21z of the first armrest portion 21b at the position of the cross-section shown in Figure 2. The left-right width W1b of the first armrest portion 21b at the position of the cross-section shown in Figure 3 is the left-right distance between the lower end 21x and the upper end 21z of the first armrest portion 21b at the position of the cross-section shown in Figure 3.

[0046] Furthermore, the rate of decrease in the width of the first armrest portion 21b in the left-right direction increases as the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b increases. The rate of decrease is expressed, for example, as the ratio of the decrease in width in the left-right direction to the change in position in the front-rear direction. In a top view, the outer shape of the first armrest portion 21b is, for example, a curved convex shape that protrudes toward the nozzle 210. Note that the rate of decrease in the width of the first armrest portion 21b in the left-right direction may be constant, for example.

[0047] Similarly, as shown in Figure 1, in a top view, the width of the second armrest portion 22b in the left-right direction decreases as the horizontal distance between the nozzle 210 and the upper end 22z of the second armrest portion 22b increases. As shown in Figure 1, the horizontal distance D2b between the nozzle 210 and the upper end 22z of the second armrest portion 22b at the cross-sectional position shown in Figure 3 is smaller than the horizontal distance D2a between the nozzle 210 and the upper end 22z of the second armrest portion 22b at the cross-sectional position shown in Figure 2. Furthermore, the width W2b of the second armrest portion 22b in the left-right direction at the cross-sectional position shown in Figure 3 is smaller than the width W2a of the second armrest portion 22b at the cross-sectional position shown in Figure 2. In other words, the width of the second armrest portion 22b in the left-right direction decreases as it moves away from the nozzle 210.

[0048] In the bathtub device 500, the horizontal distance between the nozzle 210 and the upper end 22z of the second armrest portion 22b is minimum at the position shown in the cross-section in Figure 2. Furthermore, the horizontal distance between the nozzle 210 and the upper end 22z of the second armrest portion 22b increases as you move forward from the position shown in the cross-section in Figure 2. Furthermore, the horizontal distance between the nozzle 210 and the upper end 22z of the second armrest portion 22b increases as you move backward from the position shown in the cross-section in Figure 2. The width of the second armrest portion 22b in the left-right direction is maximum at the position shown in the cross-section in Figure 2. Furthermore, the width of the second armrest portion 22b in the left-right direction decreases as you move forward from the position shown in the cross-section in Figure 2. Furthermore, the width of the second armrest portion 22b in the left-right direction decreases as you move backward from the position shown in the cross-section in Figure 2.

[0049] As shown in Figures 2 and 3, the width of the second armrest portion 22b in the left-right direction is the left-right distance between the lower end 22x and the upper end 22z of the second armrest portion 22b in a cross-section along the left-right direction. The width W2a of the second armrest portion 22b in the left-right direction at the position of the cross-section shown in Figure 2 is the left-right distance between the lower end 22x and the upper end 22z of the second armrest portion 22b in the cross-section shown in Figure 2. The width W2b of the second armrest portion 22b in the left-right direction at the position of the cross-section shown in Figure 3 is the left-right distance between the lower end 22x and the upper end 22z of the second armrest portion 22b in the cross-section shown in Figure 3.

[0050] Furthermore, the rate of decrease in the width of the second armrest portion 22b in the left-right direction increases as the horizontal distance between the nozzle 210 and the upper end 22z of the second armrest portion 22b increases. The rate of decrease is expressed, for example, as the ratio of the decrease in width in the left-right direction to the change in position in the front-rear direction. In a top view, the outer shape of the second armrest portion 22b is, for example, a curved convex shape that protrudes toward the nozzle 210. Note that the rate of decrease in the width of the second armrest portion 22b in the left-right direction may be constant, for example.

[0051] Figure 5 is an explanatory diagram showing the effects of the bathtub device according to the embodiment. As shown in Figure 5, water sprayed from the nozzle 210 of the bathtub cleaning device 200 toward the first side surface 21 hits, for example, the first upper vertical surface 21c and flows downward along the first upper vertical surface 21c. This allows the first armrest 21b to be cleaned even if the water does not directly hit it. However, as the water moves away from the nozzle 210, it loses momentum before reaching the first upper vertical surface 21c, so the water velocity at a distance from the nozzle 210 tends to be slower than the water velocity at a distance from the nozzle 210. Therefore, if the width of the first armrest 21b is too wide at a distance from the nozzle 210 where the water velocity tends to be slower than the water velocity, it becomes difficult to clean the first armrest 21b, and detergent foam and other residues may remain.

[0052] In contrast, in the bathtub device 500, as shown in Figure 5, the width of the first armrest portion 21b decreases as the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b increases. This makes it possible to make the width of the first armrest portion 21b at positions where the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b is large (i.e., positions far from the nozzle 210), where the water velocity tends to slow down, smaller than the width of the first armrest portion 21b at positions where the horizontal distance between the nozzle 210 and the upper end 21z of the first armrest portion 21b is small (i.e., positions close to the nozzle 210). As a result, the first armrest portion 21b can be easily cleaned even at positions far from the nozzle 210, where the water velocity tends to slow down.

[0053] Furthermore, in the bathtub device 500, as the horizontal distance between the spray nozzle 210 and the upper end 21z of the first armrest portion 21b increases, the rate of decrease in the width of the first armrest portion 21b in the left-right direction increases. This prevents the width of the first armrest portion 21b from becoming too shallow, making it easier to rest your arms on the first armrest portion 21b. In other words, it is easier to achieve both ease of cleaning and ease of use of the first armrest portion 21b.

[0054] Furthermore, in the bathtub device 500, as the horizontal distance between the spray nozzle 210 and the upper end 22z of the second armrest portion 22b increases, the width of the second armrest portion 22b in the left-right direction decreases. This makes it possible to make the width of the second armrest portion 22b in the left-right direction smaller than the width of the second armrest portion 22b in the left-right direction at positions where the horizontal distance between the spray nozzle 210 and the upper end 22z of the second armrest portion 22b is large (i.e., positions far from the spray nozzle 210), where the water velocity tends to slow down, is smaller than the width of the second armrest portion 22b in the left-right direction at positions where the water velocity does not slow down as easily at positions where the water velocity does not slow down easily. As a result, the second armrest portion 22b is easier to clean even at positions far from the spray nozzle 210, where the water velocity tends to slow down.

[0055] Furthermore, in the bathtub device 500, as the horizontal distance between the spray nozzle 210 and the upper end 22z of the second armrest portion 22b increases, the rate of decrease in the width of the second armrest portion 22b in the left-right direction increases. This prevents the width of the second armrest portion 22b from becoming too shallow, making it easier to rest your arms on the second armrest portion 22b. In other words, it is easier to achieve both ease of cleaning and ease of use of the second armrest portion 22b.

[0056] In the bathtub device 500, the shape of the second armrest portion 22b is different from the shape of the first armrest portion 21b, which is the reverse of the left and right sides. The shape of the second armrest portion 22b may be the same as the shape of the first armrest portion 21b, which is the reverse of the left and right sides.

[0057] The embodiment may include the following configurations. (Composition 1) A bathtub having a bottom surface and side surfaces extending upward from the outer peripheral edge of the bottom surface, A bathtub cleaning device having a nozzle provided on the bottom surface that sprays water toward the side surface, Equipped with, The aforementioned side portion is, A first side portion extending in the front-to-back direction, Extending in the front-rear direction, a second side portion facing the first side portion, A third side portion connecting one end of the first side portion and one end of the second side portion, A fourth side portion connecting the other end of the first side portion and the other end of the second side portion, It has, The first side portion is, A first lower vertical surface portion extending upward from the outer peripheral end of the bottom surface portion, A first armrest portion extending upward and toward the outside of the bathtub from the upper end of the first lower vertical portion, A first upper vertical surface portion extending upward from the upper end of the first armrest portion, It has, A bathtub device wherein the width of the first armrest portion in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the first armrest portion increases. (Configuration 2) The bathtub apparatus according to configuration 1, wherein the rate of reduction in the width of the first armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the first armrest portion increases. (Composition 3) The second side portion is, A second lower vertical surface portion extending upward from the outer peripheral end of the bottom surface portion, A second armrest portion extending upward and toward the outside of the bathtub from the upper end of the second lower vertical portion, A second upper vertical surface portion extending upward from the upper end of the second armrest portion, It has, The bathtub apparatus according to configuration 1 or 2, wherein the width of the second armrest portion in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases. (Composition 4) The bathtub apparatus according to configuration 3, wherein the rate of reduction in the width of the second armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases.

[0058] As described above, according to the embodiment, a bathtub device is provided in which the armrest portion is easy to clean.

[0059] Embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. Modifications made by those skilled in the art to the above-described embodiments are also included within the scope of the present invention, as long as they retain the features of the present invention. For example, the shape, dimensions, material, and arrangement of each element of a bathtub device, etc., are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of each of the embodiments described above can be combined to the extent technically possible, and these combinations are also included within the scope of the present invention insofar as they include the features of the present invention. [Explanation of Symbols]

[0060] 10: Bottom part 10a: Outer edge 11: Drain port 20: Side part 20a: Upper end 21:First side part 21a: 1st lower elevation section 21a1: Curved section 21a2: Extended part 21b: First armrest section 21b1: Inner curved portion 21b2:Outside curved part 21c: 1st upper elevation section 21p: One end 21q: Other end 21x: Bottom edge 21z:Top edge 22:Second side part 22a: Second lower elevation 22a1: Curved section 22a2: Extended part 22b: Second armrest section 22b1: Inner curved portion 22b2:Outside curved part 22c: 2nd upper elevation section 22p: One end 22q: Other end 22x: bottom edge 22z:Top edge 23: Third side part 23a: Curved section 23b: Extended part 24: 4th side part 24a: Curved section 24b: Extended part 30: Rim section 31: First rim section 32: Second rim section 33: Third rim section 34: Fourth rim section 100: Bathtub 200: Bathtub cleaning device 210: Nozzle 500: Bathtub equipment D1a, D1b, D2a, D2b: Distance W1a, W1b, W2a, W2b: width

Claims

1. A bathtub having a bottom surface and side surfaces extending upward from the outer peripheral edge of the bottom surface, A bathtub cleaning device having a nozzle provided on the bottom surface that sprays water toward the side surface, Equipped with, The aforementioned side portion is, A first side portion extending in the front-to-back direction, A second side portion extends in the front-rear direction and faces the first side portion, A third side portion connecting one end of the first side portion and one end of the second side portion, A fourth side portion connecting the other end of the first side portion and the other end of the second side portion, It has, The first side portion is, A first lower vertical surface portion extending upward from the outer peripheral end of the bottom surface portion, A first armrest portion extending upward and toward the outside of the bathtub from the upper end of the first lower vertical surface portion, A first upper vertical surface portion extending upward from the upper end of the first armrest portion, It has, A bathtub device wherein the width of the first armrest portion in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the first armrest portion increases.

2. The bathtub device according to claim 1, wherein the rate of reduction in the width of the first armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the first armrest portion increases.

3. The second side portion is, A second lower vertical surface portion extending upward from the outer peripheral end of the bottom surface portion, A second armrest portion extending upward and toward the outside of the bathtub from the upper end of the second lower vertical portion, A second upper vertical surface portion extending upward from the upper end of the second armrest portion, It has, The bathtub device according to claim 1 or 2, wherein the width of the second armrest portion in the left-right direction decreases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases.

4. The bathtub device according to claim 3, wherein the rate of reduction in the width of the second armrest portion in the left-right direction increases as the horizontal distance between the spray nozzle and the upper end of the second armrest portion increases.

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