Bathtub and bathroom

Abstract

To provide a bathtub capable of improving a degree of freedom of a bathing posture.SOLUTION: A bathtub 10 includes a bathtub body 30 for storing hot water. The bathtub body 30 includes a first side wall part (side wall part 30D) having a swollen part 36 in the lower part. The part of the swollen part 36 lower than the upper end 36A spreads outward. In the bathtub 10, the bathtub body 30 can have a second side wall part (side wall part 30C) facing the first side wall part, which spreads outward and upward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to bathtubs and bathrooms. [Background technology]

[0002] Patent Document 1 discloses a conventional bathtub. This bathtub is equipped with a bathtub body that holds hot and cold water. The bathtub body has a bottom that is formed in a roughly arc-shaped shape when viewed from the side, with the center of its long side lower than both ends. This configuration allows the bather to bathe in a comfortable supine position, similar to sleeping in a hammock. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-260180 Summary of the Invention [Problem to be solved by the invention]

[0004] The bathtub in Patent Document 1 does not take into consideration bathing in positions other than lying down, which raises concerns that the bathtub in Patent Document 1 may limit bathing positions when trying to bathe comfortably.

[0005] Therefore, the problem to be solved by this disclosure is to provide a bathtub that allows for greater freedom of bathing posture. [Means for solving the problem]

[0006] The bathtub disclosed herein is a bathtub having a bathtub body for storing hot and cold water, the bathtub body having a first side wall portion with a bulge portion at the bottom, the bulge portion extending outward below the upper end.

[0007] The bathroom according to the present disclosure includes a hanging portion for suspending the bathtub. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a schematic view of a bathroom in which a bathtub according to a first embodiment is installed. [Figure 2] 1 is a perspective view showing a bathtub according to a first embodiment. [Figure 3] 1 is a diagram for explaining the operation of the bathtub according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] First, embodiments of the present disclosure will be listed and described. Any combination of the following multiple embodiments within a range that does not cause contradictions is also included in the description of the present invention.

[0010] The bathtub according to the present disclosure comprises: [1] A bathtub having a bathtub body for storing hot and cold water, the bathtub body having a first side wall portion with a bulge portion at the bottom, the bulge portion extending outward below its upper end. [2] In the bathtub of [1] above, the bathtub body has a second side wall portion that faces the first side wall portion and extends upward and outward. [3] In either of the bathtubs [1] and [2] above, the bathtub body is made of a sheet that is used to store hot and cold water while suspended. [4] The bathroom according to the present disclosure is provided with a hanging section for hanging the bathtub described above in [3].

[0011] <Embodiment 1> A bathtub 10 and bathroom 1 according to a first embodiment of the present disclosure, which embody the bathtub and bathroom, will be described with reference to the drawings. As shown in FIG. 1, the bathtub 10 is placed in bathroom 1. Bathroom 1 is rectangular parallelepiped-shaped. Bathroom 1 includes walls W1, W2, and W3 and a floor F. Bathroom 1 is surrounded by walls W1, W2, and W3 on three of the four sides of floor F in a plan view, and a wall with an entrance (not shown) is located on the other side.

[0012] As shown in FIG. 1, bathroom 1 is equipped with a shower system 2. Shower system 2 is located on wall W1, one of walls W1, W2, and W3. Shower system 2 is located on wall W1, closer to wall W3. Shower system 2 includes a faucet 3, an overhead shower 4, and a hand shower 5. Faucet 3 is formed in a long cylindrical shape extending horizontally along the surface of wall W1. Faucet 3 is connected to a water supply pipe and a hot water supply pipe (not shown) within wall W1. Faucet 3 is a mixer faucet. Faucet 3 can adjust the water volume, adjust the temperature by mixing hot and cold water, stop the water supply, and switch the flow path. In this specification, hot and cold water supplied from a faucet installed in a bathroom is referred to as hot and cold water, regardless of the temperature, mixing ratio, etc. Faucet 3 includes a water outlet pipe 3A. Faucet 3 can select either the water outlet pipe 3A, the overhead shower 4, or the hand shower 5 to dispense hot and cold water.

[0013] As shown in Figure 1, a bathtub 10 is installed in bathroom 1. Bathtub 10 is attached to a pair of opposing walls W1 and W2 out of three walls W1, W2, and W3. Bathtub 10 is removably attached to walls W1 and W2. In other words, when using bathroom 1 for a purpose other than bathtub 10, bathtub 10 can be removed and used. For example, as shown in Figure 2, bathroom 1 can be conveniently used as a shower room by removing bathtub 10.

[0014] Each of the pair of walls W1 and W2 has a hanging member 20. The hanging member 20 corresponds to the hanging portion according to the present disclosure. The bathtub 10 is attached by hanging it on the hanging member 20. The hanging member 20 is a hook-shaped member that is J-shaped in a side view and opens upward. As shown in FIG. 1, two hanging members 20 on the wall W1 side are arranged below the faucet 3 and spaced apart horizontally. Two hanging members 20 on the wall W2 side are provided at the same height and spaced apart as the hanging members 20 on the wall W1 side. In other words, two hanging members 20 are provided on each of the pair of walls W1 and W2, for a total of four. Each hanging member 20 hangs the bathtub 10 by hooking a loop portion 41 (described later) on the bathtub 10.

[0015] Bathtub 10 is detachably attached to a pair of walls W1, W2. Bathtub 10 is filled with hot water. Bathtub 10 can be freely changed in shape, such as folded or unfolded. Bathtub 10 fills with hot water when unfolded. Bathtub 10 is boat-shaped when suspended and filled with hot water.

[0016] As shown in Figures 1 and 2, the bathtub 10 comprises a bathtub body 30. The bathtub body 30 is filled with hot water. The bathtub body 30 is made of a flexible sheet and is filled with hot water when suspended. The bathtub 10 comprises a rope 40 for suspending the bathtub body 30. The rope 40 is arranged along the upper edge of the bathtub body 30. The rope 40 has loop portions 41 formed at both ends. The loop portions 41 are the parts of the bathtub 10 that are hooked onto hanging members 20 provided on the walls W1 and W2 of the bathroom 1. The bathtub 10 can be attached and detached to the bathroom 1 by hooking and detaching the loop portions 41 onto the hanging members 20.

[0017] The sheet-made bathtub body 30 is formed by cutting, joining, and other processes from a single sheet material. The sheet that makes up the bathtub body 30 is flexible but has little stretchability. For this reason, the bathtub body 30 retains its boat-like shape to some extent when in use. When in use, the bathtub body 30 has a rectangular shape in a plan view. When in use, the upper edge of the bathtub body 30 is open upward.

[0018] As shown in Figure 2, the bathtub body 30 has four side walls 30A, 30B, 30C, and 30D. Side walls 30A and 30B extend downward from a pair of opposing long sides in a plan view. Side walls 30C and 30D extend downward from a pair of opposing short sides in a plan view. Both end edges of side walls 30C and 30D are continuous with both end edges of side walls 30A and 30B.

[0019] Of the four side walls 30A, 30B, 30C, and 30D, three side walls 30A, 30B, and 30C gradually widen outward from their lower ends to their upper ends. The upper portion of side wall 30D gradually widens outward toward the top. The lower portion of side wall 30D has a bulge 36, which will be described later, and is different in shape from the other side walls. Of the four side walls 30A, 30B, 30C, and 30D, side wall 30D corresponds to the first side wall of the present disclosure, and side wall 30C, which faces side wall 30D, corresponds to the second side wall of the present disclosure.

[0020] As shown in FIG. 2, the bathtub body 30 has a joint 31, a folded portion 32, and a bulge 36. The joint 31 is formed by joining the edges of cut sheets together using heat welding, sewing, or other methods. The joint 31 is formed on the side walls 30C and 30D that form the shorter sides of the rectangle out of the four side walls 30A, 30B, 30C, and 30D of the bathtub body 30. The joint 31 extends vertically in the center of the extension direction of the sides of the side walls 30C and 30D. The provision of such joint 31 contributes to the boat-like shape of the bathtub body 30 in the bathtub 10.

[0021] As shown in FIG. 2, the folded portion 32 has a wide portion 32A and an insertion portion 32B. The wide portion 32A is provided in the portion corresponding to the four corners of the rectangular bathtub body 30, which is rectangular in plan view. The wide portion 32A is formed wider than the other portions by setting a large folding margin. The insertion portion 32B is a portion of the folded portion 32 that extends along the long side. The insertion portion 32B connects the wide portions 32A at the four corners. The insertion portion 32B is cylindrical, and a rope 40 is inserted inside. The cylindrical space inside the insertion portion 32B is connected to the space inside the wide portions 32A at both ends. The rope 40 inside the insertion portion 32B extends to the wide portions 32A at both ends. The bathtub 10 is configured to suspend the bathtub body 30 while distributing the load over approximately the entire length of the rope 40 in the extension direction. Therefore, the bathtub 10 suppresses localized load imbalance on the sheet that forms the bathtub body 30.

[0022] The rope 40 is used to suspend the bathtub body 30. The rope 40 suspends the bathtub body 30 when the bathtub 10 is in use. As shown in FIG. 2, the rope 40 is arranged on the upper edge of the side walls 30A, 30B, 30C, and 30D of the bathtub body 30, which are rectangular in plan view. In other words, when the bathtub 10 is installed, the bathtub body 30 is suspended from the rope 40 at the upper edges of the two opposing side walls 30A and 30B. The rope 40 extends continuously from the wide portion 32A at one end to the wide portion 32A at the other end. This allows the rope 40 to function as a reinforcing member that reinforces the upper edge of the bathtub body 30 when suspended. The rope 40 has a loop 41. The loop 41 is provided at both ends of the rope 40. The loop portion 41 exposes the rope 40 in a loop shape to the outside from the wide portion 32A, and returns the end portion to the inside of the wide portion 32A and fixes it to the wide portion 32A.

[0023] When in use, hanging from the rope 40 and filled with hot water, the bathtub body 30 has a boat-like shape with a downward recess in the center. When in use, the upper edge of the bathtub body 30 opens upward. When in use, the bathtub body 30 has a boat-like shape that gradually widens from the bottom to the top. When in use, the underside of the center of the bathtub body 30 comes into contact with the floor F of the bathroom 1. This allows the floor F to support most of the load of the bathtub 10 when in use. Therefore, the reinforcing structure of the walls W1 and W2 can be simplified compared to when the bathtub 10 is supported only by the walls.

[0024] As shown in FIG. 1, the loop portion 41 is hooked onto a hanging member 20 provided on the walls W1 and W2. The loop portion 41 is provided on the upper edge of the bathtub 10. Specifically, as shown in FIG. 2, the loop portion 41 is provided on the four corners of the bathtub main body 30, which is rectangular in plan view. The bathtub main body 30 is hung from the hanging member 20 via a rope 40 with the loop portion 41 hooked onto the hanging member 20. The bathtub 10 is detachably attached to the walls W1 and W2 by hooking the loop portion 41 onto the hanging member 20.

[0025] As shown in FIGS. 1 and 2, the bulging portion 36 is provided at the lower part of the side wall portion 30D. The bulging portion 36 is formed by bulging outward from the lower part of the side wall portion 30D. As shown in FIG. 3, the bulging portion 36 expands outward below the upper end 36A. In other words, the bulging portion 36 has a portion that bulges outward below the upper end 36A and beyond the position of the upper end 36A. Note that the upper end of the bulging portion according to the present disclosure refers to the innermost portion of the bulging portion above the outermost end. In the case of the bulging portion 36 shown in FIG. 3, the upper end 36A is located innermost above the outermost end 36C. As shown in FIG. 3, the portion of the side wall portion 30D from the lower end 36B of the bulging portion 36 to the outermost end 36C of the bulging portion 36 forms an inclined surface that slopes outward as it extends upward. In the side wall 30D, the portion from the outermost end 36C of the bulge 36 to the upper end 36A forms an inclined surface that slopes inward as it extends upward. In the side wall 30D, the portion from the upper end 36A of the bulge 36 to the upper end of the side wall 30D widens outward as it extends upward. In the bathtub body 30, the upper end of the side wall 30D is located outside the outermost end 36C of the bulge 36. In the bulge of the present disclosure, the outermost end of the bulge may be the outermost end of the side wall.

[0026] As shown in Figure 3, side wall 30C, which is the opposing wall of side wall 30D, differs from side wall 30D in that it expands continuously outward from the bottom to the top. That is, in the bathtub body 30, the pair of opposing side walls 30C, 30D have asymmetric shapes. On the other hand, side wall 30C and side wall 30D have approximately symmetric shapes above bulging portion 36.

[0027] The function and effect of the bathtub 10 and bathroom 1 configured as described above will now be explained. The bathtub 10 can be attached and detached freely to the walls W1 and W2 of the bathroom 1. This makes it extremely easy to install and store the bathtub 10. When installing the bathtub 10, it can be installed simply by hooking the four loop portions 41, which serve as engagement parts, onto the hanging members 20 on the walls W1 and W2. The bathtub 10 is hung from the hanging members 20, and in this state, hot and cold water is filled in the bathtub body 30 and used.

[0028] To fill the bathtub 10 with hot water, the faucet 3 in the shower device 2 is used. The faucet 3 can discharge hot water from either the water outlet pipe 3A, the overhead shower 4, or the hand shower 5. A bather in the bathtub 10 can fill the bath with hot water from the water outlet pipe 3A, or from either the overhead shower 4 or the hand shower 5. The bathtub 10 is flexible and can be shaped to fit the bather's body.

[0029] When in use, the underside of the center of the bathtub 10 contacts the floor F. This contact between the underside of the bathtub 10 and the floor F allows the weight of the water and bather in the bathtub 10 to be properly supported by the floor F. This prevents excessive load from being placed on the parts of the bathtub 10 involved in suspending it, such as the hanging member 20, loop portion 41, rope 40, and insertion portion 32B. The bathroom 1 can simplify the strength of its suspension structure compared to a structure in which the bathtub is suspended only by its upper edge. Specifically, the strength of the bathroom 1's configuration, such as the hanging member 20 and wall W1 and W2 structures, and the bathtub 10's configuration, such as the bathtub body 30 and rope 40 structures, can be simplified.

[0030] When in use, the water pressure of the stored water acts on each part of the bathtub 10. This water pressure causes each part of the bathtub 10 to deform, and the bathtub body 30 and rope 40 become taut. In particular, the rope 40, which is stretched between the walls W1 and W2 at the upper edge, becomes taut enough that it does not shake significantly even when you place your hand on it. Therefore, while the bathtub 10 is freely deformable, deformation is suppressed by storing water, and a stable shape is maintained even when bathers enter or exit the bathtub 10. In this state, water pressure also acts on the bulge 36 located at the bottom of the side wall 30D. This causes the bulge 36 to maintain its outwardly expanded shape.

[0031] By providing a bulge 36 on the side wall 30D of the bathtub 10, when the bather assumes a bathing position with their back facing the side wall 30C and their feet facing the side wall 30D, as shown in Figure 3, the bather's toes can be comfortably accommodated within the bulge 36.

[0032] In bathtub 10, side wall 30C, which faces side wall 30D with bulge 36, is shaped differently from side wall 30D, making these pair of side walls 30C, 30D asymmetrical. This allows bathers in bathtub 10 to enjoy different bathing positions depending on their orientation. Specifically, side wall 30C is shaped to expand outward toward the top. This makes it easy for bathers in bathtub 10 to lie supine with their backs leaning against side wall 30C, as shown in Figure 3, for example. Furthermore, side wall 30D, the opposing wall to side wall 30C, is provided with bulge 36, allowing feet facing side wall 30D to be comfortably accommodated within bulge 36.

[0033] Let's assume that the bathtub body 30 does not have a bulge 36, and that the pair of opposing side walls 30C, 30D have symmetrical shapes. In Figure 3, the two-dot chain line indicated by the symbol V on the side of side wall 30D assumes that side wall 30D does not have a bulge 36 and is formed symmetrically with side wall 30C. In this case, the bather will need to bend their legs more than if the bulge 36 were provided. By having the bulge 36, the bathtub body 30 creates more space around the bather's feet, allowing them to bathe in a relaxed position.

[0034] By providing the bulge 36 on the bathtub body 30, the bathtub 10 can create extra space at the bottom. For example, consider a situation where a bather sits cross-legged while bathing. Generally, when sitting cross-legged, the knees extend to the sides of the upper body. By storing these protruding knees within the bulge 36, the bather can sit cross-legged in the bathtub 10 with ample space.

[0035] For example, consider a situation where a bather bathes with their back to side wall 30D. In this case, the bather can bathe in a sitting position with their legs facing side wall 30C and their upper body upright. At this time, by inserting their buttocks into bulging portion 36 and placing the inward-protruding portion near upper end 36A of bulging portion 36 against their back, the bather can assume a comfortable sitting position with their upper body supported.

[0036] The bulge 36 extends from the outermost end 36C to the upper end 36A. This section forms a slope that slopes inward as it extends upward. This allows the bathtub 10 to have ample space in the lower part without increasing its overall size. Conventional bathtubs are typically formed so that they widen outward as they extend upward from the lower to the upper side. With this shape, enlarging the lower part of the bathtub requires enlarging the upper part as well. In contrast, the bathtub 10 has a bulge 36 formed in the bathtub body 30. The section of the bulge 36 from the outermost end 36C to the upper end 36A forms an inclined surface that slopes inward as it extends upward. By forming this bulge 36, the bathtub 10 has ample space in the lower part without affecting its overall size.

[0037] In this way, by forming the bulge 36 on the bathtub body 30, bathtub 10 creates extra space at the bottom of the bathtub 10. When assuming a typical bathing position, the lower half of the body, which usually takes up more space than the upper half, is located at the bottom of the bathtub. For this reason, a bathtub 10 configuration that allows bathing in a variety of comfortable positions while keeping the overall size small is extremely significant.

[0038] After bathing, the bathtub 10 is drained and removed from the walls W1 and W2. To remove the bathtub 10 from the walls W1 and W2, the bathtub 10 can be easily removed by simply removing the loop portion 41 from the hanging member 20. Once removed, the bathtub 10 is washed, dried, folded, and stored. Because the bathtub 10 is detachable, the entire interior and exterior surfaces of the bathtub 10 can be cleaned, unlike conventional freestanding bathtubs. Because the bathtub 10 is made of sheet material, even the outward-extending portions, such as the bulging portion 36, can be easily cleaned by turning it over or otherwise deforming it. Once the bathtub 10 is drained of water and hot water, it can be removed from the walls W1 and W2 and freely folded, rolled, or otherwise transformed. The bathtub 10 can be easily transformed into a shape suitable for storage.

[0039] When the bathtub 10 is removed, the bathroom 1 can be conveniently used as a shower room where a shower can be taken. When the bathtub 10 is not installed, the entire floor F can be used as a washing area for showering. In the bathroom 1, a shower can be taken using at least one of the overhead shower 4 and the hand shower 5 of the shower device 2. When a shower is taken with the bathtub 10 removed, no bubbles or water will adhere to the bathtub 10. This makes the bathroom 1 easy to clean after a shower.

[0040] Because bathtub 10 is made of sheet, it is easy to manufacture inexpensively compared to conventional bathtubs made of FRP or the like. Therefore, it is relatively easy to provide a dedicated bathtub 10 for each user. In this case, the size, design, etc. of bathtub 10 can be freely set to suit each user. Compared to conventional freestanding bathtubs made of FRP or the like, bathtub 10 has advantages in terms of transportation costs and recyclability. Therefore, bathtub 10 can reduce the environmental impact. It is relatively easy for one user to own multiple bathtubs 10. In this case, the user can select the desired bathtub from multiple bathtubs 10 depending on their mood, the season, etc., just like choosing clothes.

[0041] As described above, the bathtub 10 according to the first embodiment includes a bathtub body 30 for storing hot and cold water. The bathtub body 30 has a sidewall 30D as a first sidewall with a bulge 36 at its bottom. The bulge 36 extends outward below the upper end 36A. This configuration allows the bathtub 10 to offer greater flexibility in bathing posture. For example, a bather can fit their toes, knees, buttocks, and other body parts within the bulge 36, making it easier for them to adopt a more comfortable bathing posture. Therefore, compared to conventional bathtubs without bulges, the bathtub 10 allows the bather to adopt a more comfortable posture, improving the bather's flexibility in bathing posture.

[0042] In the bathtub 10, the bathtub body 30 has a side wall 30C that faces the side wall 30D and expands upward and outward. The side wall 30C corresponds to the second side wall of the present disclosure. Therefore, the bathtub 10 allows the bather to easily lie down with their back leaning against the side wall 30C, and in this case, the toes facing the side wall 30D are contained within the bulge 36, allowing for a comfortable, relaxed posture. The side wall 30C has an asymmetrical shape compared to the side wall 30D. Therefore, the bather can change their position within the bathtub 10 to enjoy a comfortable bath in any position, such as lying down or sitting.

[0043] The bathtub body 30 of the bathtub 10 is made of a sheet that is used to fill with hot and cold water while suspended. Therefore, by deforming the bathtub body 30, such as by turning the bathtub 10 upside down or flattening it, the outward-spreading portions, such as the bulging portion 36, can be easily cleaned.

[0044] The bathroom 1 in embodiment 1 is equipped with a hanging member 20 for hanging the bathtub 10. Therefore, when taking a shower, for example, the bathroom 1 can create a larger space by removing the bathtub 10. In other words, the bathroom 1 can be fitted with the bathtub 10 only when it is needed, and can be removed when it is not needed. Therefore, by removing the bathtub 10 when the bathroom 1 is being used for a purpose other than its intended use, the space can be used more efficiently by eliminating the bathtub 10.

[0045] <Other embodiments> The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments are also included within the technical scope of the present disclosure: In the present disclosure, the various features of the above-described embodiments and the embodiments to be described later may be combined in any manner as long as they are not inconsistent.

[0046] The configuration of the bathtub according to the present disclosure is not limited to the above embodiments. It is not essential that the bathtub body be made of sheet. If the bathtub body is made of sheet, the bathtub may be configured with a member for suspending the bathtub body, such as a rope, as in the above embodiments, or may be configured with only the bathtub body. If the bathtub is a hanging type, the suspending part for suspending the bathtub may be provided on something other than the bathroom wall, such as the ceiling or floor.

[0047] The bathtub body according to the present disclosure is not particularly limited in shape, size, configuration, etc., as long as it has a bulge portion. The shape of the bathtub body is not limited to the shapes exemplified in the above embodiments. When viewed from above in use, the bathtub body can be a polygonal shape such as a square, triangle, or pentagon, a circle, an ellipse, or the like.

[0048] When the bathtub body is made of a sheet, the configuration of the sheet forming the bathtub body is not limited to the configurations exemplified in the above embodiments. The sheet may have a single-layer structure or a multi-layer structure having two or more layers. It is preferable that the sheet have a two-layer or more layer structure, including a layer formed of a water-impermeable material that ensures waterproofness and a layer formed of a durable material that ensures strength.

[0049] In the bathtub disclosed herein, it is not essential that the bathtub body has a folded portion. If the bathtub body has a folded portion, its configuration, shape, arrangement, etc. are not limited to the above-described embodiments. The folded portion may be provided around the entire upper edge of the bathtub body, or may be provided partially, such as on only one of the four sides of the upper edge of the bathtub body, which is rectangular in plan view. The folded portion may be folded inward at the upper edge of the bathtub body when in use.

[0050] The bathtub according to the present disclosure does not necessarily need to include a hanging rope. If the bathtub includes a hanging rope, its shape, arrangement, etc. are not limited to those of the above-described embodiments. The hanging rope may be looped. In this case, the hanging rope may be a looped rope that runs along the upper edge of the bathtub body, a looped rope that is passed through a through-hole formed in the bathtub body, or the like.

[0051] The shape, size, arrangement, number, etc. of the bulging portions according to the present disclosure are not limited to the above-described embodiments. The bulging portions may also be provided on one or more side walls other than the first side wall. The bulging portions may be provided continuously around the entire circumference of the four side walls that form the bathtub body. Two or more bulging portions may be provided on one side wall. If the bathtub body is rectangular in plan view, the bulging portions may be provided on the side walls that form the sides corresponding to the long sides of the rectangle.

[0052] The shape of the bulging portion is not limited to the semicircular arc shape in side view exemplified in the above embodiment, and the bulging portion according to the present disclosure may have any shape as long as it has a portion that widens outward below its upper end, in other words, has a portion that widens outward below its upper end. [Explanation of symbols]

[0053] 10...bathtub, 30...bathtub body, 30C...side wall portion (second side wall portion), 30D...side wall portion (first side wall portion), 36...bulging portion, 36A...upper end of bulging portion

Claims

1. A bathtub equipped with a bathtub body for storing hot water, The bathtub body has a first side wall portion having a bulge portion at the bottom, The bulging portion of the bathtub widens outward below its upper end.

2. The bathtub according to claim 1, wherein the bathtub body has a second side wall portion facing the first side wall portion and extending upward and outward.

3. The bathtub according to claim 1 or 2, wherein the bathtub body is made of a sheet that is used by storing hot and cold water in a suspended state.

4. A bathroom equipped with a hanging part for hanging the bathtub according to claim 3.

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