Bathtub pillow and bathtub

Abstract

To provide a bathtub pillow capable of suppressing deformation of an internal storage space without impairing cushioning properties and preventing bend marks from forming on an upper surface.SOLUTION: A bathtub pillow to be installed in a bathtub and on which a bather's head can be rested, includes: a support section having a pair of side parts and a rear end part for connecting rear ends of the pair of side parts, and supporting a weight of the bather's head; and a headrest section provided on the support section, forming an upper surface on which the bather's head is rested, and covering the upper part of the space between the pair of side parts to form a storage space for storing a functional part of the bathtub together with the support section. The hardness of the headrest section is softer than that of the support section, and a connection line on the storage space side, representing an outer edge of a connection surface between the rear end part and the headrest section is curved with an inflection point.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Aspects of the present invention generally relate to bathtub pillows. [Background technology]

[0002] Bathtub pillows are known that are installed in a bathtub so that a bather can place his / her head on them and enjoy a comfortable bath. Among such bathtub pillows, there is a type that has a storage space inside so that it can be installed while covering the functional parts such as the water discharge device, as shown in Patent Document 1, for example.

[0003] Since the bathtub pillow is where the bather's head rests, it is preferable that at least the upper surface of the bathtub pillow is made of a relatively soft material with elasticity. However, if the entire bathtub pillow is made of a soft material, it may be unable to support the weight of the bather's head and may bend downward. In particular, in the case of a bathtub pillow that has a storage space inside, the problem of not being able to properly maintain the storage space due to downward bending occurs.

[0004] Therefore, in a type of bathtub pillow that has storage space inside, it is considered that the bathtub pillow is formed from a support part for supporting the weight of the bather's head, and a head rest part that is positioned above the support part and has at least the upper surface made of a material that is softer than the support part.

[0005] When a bathtub pillow is formed with a support part and a head rest part, when the bathtub pillow is removed from the bathtub for cleaning or the like, the worker is likely to grab the head rest part that forms the upper surface and apply force upward to remove it. At this time, the head rest part, which is made of a material softer than the support part, bends, and if this is repeated, there is a problem that a crease due to the bending will be formed on the upper surface of the head rest part. For this reason, it is desirable to be able to suppress the deformation of the storage space without compromising the cushioning properties, and to suppress the occurrence of creases on the upper surface of a bathtub pillow that has a storage space inside. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2016-8428 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made based on the recognition of such problems, and aims to provide a bathtub pillow that can suppress deformation of the internal storage space without compromising cushioning properties and can suppress the appearance of creases on the upper surface. [Means for solving the problem]

[0008] The first invention is a bathtub pillow that is installed in a bathtub and on which a bather can place his or her head, the bathtub pillow comprising: a support portion having a pair of side portions and a rear end portion connecting the rear ends of the pair of side portions, for supporting the weight of the bather's head; and a head rest portion that is provided on top of the support portion, forms an upper surface on which the bather's head is placed, and covers the upper part of the space between the pair of side portions, thereby forming, together with the support portion, a storage space for storing functional parts of the bathtub, wherein the hardness of the head rest portion is softer than that of the support portion, and the connection line on the storage space side, which represents the outer edge of the connection surface between the rear end portion and the head rest portion, is curved with an inflection point.

[0009] According to this bathtub pillow, by forming the bathtub pillow with a hard support part and a soft head rest part, it is possible to suppress the deformation of the storage space when the bather's head is placed on it without compromising the cushioning properties. And the connection line on the storage space side is curved with an inflection point. This makes it difficult for a worker to apply force from the front end of the head rest part formed of a soft material to the connection line due to the "principle of leverage" when trying to remove the bathtub pillow from the bathtub by gripping the front end of the head rest part formed of a soft material and applying force upward. Therefore, compared to a case where a connection line extending linearly in the left-right direction is formed, for example, it is possible to suppress the head rest part formed of a soft material from bending significantly with respect to the support part at the base point of the connection line, and the occurrence of a crease on the upper surface of the head rest part. For example, since the connection line on the storage space side is curved with an inflection point, it is possible to suppress the head rest part from bending at the same point with the base point of the connection line when the head rest part is repeatedly bent, compared to a straight connection line. For example, the bending point of the head rest part can be shifted back and forth. Therefore, even if the head rest part is repeatedly bent, it is possible to prevent a large crease from occurring on the upper surface of the head rest part. In this way, it is possible to provide a bathtub pillow that can prevent the deformation of the internal storage space without compromising the cushioning properties and can prevent creases from occurring on the upper surface.

[0010] A second invention is a bathtub pillow according to the first invention, characterized in that the vicinity of the left-right center of the connection line on the storage space side is located forward of the inflection point.

[0011] The vicinity of the center in the left-right direction of the head rest part is easier to grasp and apply force to than the ends in the left-right direction, so there is a high possibility that a large force will be applied to the head rest part. In addition, when the front end of the head rest part is grasped near the center in the left-right direction of the storage space, the distance from the pair of side parts of the support part is longer, so the force of the "principle of leverage" is more likely to be applied to the head rest part than when other parts of the front end of the head rest part are grasped. Therefore, by positioning the vicinity of the center in the left-right direction of the connection line on the storage space side forward of the inflection point as described above, it is possible to make it difficult for the force of the "principle of leverage" with the connection line as the base point to be applied to the head rest part, even when the part of the head rest part near the center of the storage space of the storage space is grasped. This makes it possible to more reliably prevent the head rest part from bending significantly with the connection line as the base point, and to prevent a crease from occurring on the upper surface of the head rest part.

[0012] The third invention is a bathtub pillow characterized in that, in the second invention, the connection line on the storage space side has a curved portion that is curved so as to be convex toward the front side, and the apex portion of the curved portion is located near the left-right center of the connection line on the storage space side.

[0013] With this bathtub pillow, even when the area near the center of the storage space of the head rest portion is grasped, the force due to the "leverage principle" based on the connection line is less likely to be applied to the head rest portion.

[0014] A fourth invention is a bathtub pillow according to any one of the first to third inventions, characterized in that at least a part of the connection line on the storage space side is wavy.

[0015] With this bathtub pillow, at least a portion of the connection line has a wavy shape, i.e., a shape with multiple inflection points and vertices that serve as nodes, which more reliably prevents the head rest portion from bending significantly and leaving large creases on the upper surface of the head rest portion.

[0016] The fifth invention is a bathtub pillow which, in any one of the first to fourth inventions, is characterized in that at least a portion of the connection line on the storage space side is located forward of an imaginary line connecting the rear ends of the pair of side portions.

[0017] With this bathtub pillow, even when a worker grasps the front end of the head rest part, which is made of a soft material, and applies upward force in an attempt to remove the bathtub pillow from the bathtub, it is possible to make it less likely that force due to the "leverage principle" will be applied from the front end of the head rest part to the connection line. Effect of the Invention

[0018] According to an aspect of the present invention, a bathtub pillow is provided that can suppress deformation of the internal storage space without compromising cushioning properties and can suppress the occurrence of creases on the upper surface. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing a bathtub and a bathtub pillow according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view showing a bathtub and a bathtub pillow according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a perspective view showing a bathtub pillow according to an embodiment of the present invention; [Figure 4] FIG. 2 is a bottom view showing a schematic diagram of a bathtub pillow according to an embodiment. [Diagram 5] FIG. 1 is a cross-sectional view showing a schematic diagram of a bathtub pillow according to an embodiment. [Figure 6] FIG. 11 is a bottom view showing a schematic diagram of a modified example of the bathtub pillow according to the embodiment. [Figure 7] FIG. 11 is a bottom view showing a schematic diagram of a modified example of the bathtub pillow according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment will be described with reference to the drawings. In the drawings, like elements are designated by like reference numerals, and detailed description thereof will be omitted as appropriate. FIG. 1 is a perspective view that illustrates a bathtub and a bathtub pillow according to an embodiment. FIG. 2 is a plan view that illustrates a bathtub and a bathtub pillow according to an embodiment. 1 and 2, the bathtub pillow 10 is installed in a bathtub 100 that stores hot and cold water. The bathtub pillow 10 is used while attached to the bathtub 100, and allows a bather who has entered the bathtub 100 to place his / her head on it. In other words, the bathtub pillow 10 is attached to the bathtub 100 so as to support the bather's head.

[0021] The bathtub 100 comprises a bathtub body 102. The bathtub body 102 has an inner wall surface 104. The inner wall surface 104 has a backrest surface 106 that supports the back of the bather. Here, in this specification, when viewed from the bather with his / her back against the backrest surface 106, the upper side is referred to as the "upper side", the lower side is referred to as the "lower side", the front side is referred to as the "forward side", the rear side is referred to as the "rearward side", the right side is referred to as the "right side", and the left side is referred to as the "left side".

[0022] The bathtub 100 is equipped with a functional unit 110. The functional unit 110 is provided on the upper end (rim surface) connected to the backrest surface 106. The functional unit 110 is, for example, a water discharge unit that discharges hot and cold water toward the inside of the bathtub body 102. The functional unit 110 discharges hot and cold water toward the front. The bathtub 100, for example, sucks up hot and cold water stored in the bathtub body 102 using a pump (not shown), and discharges the sucked up hot and cold water from the functional unit 110. In other words, the bathtub 100 circulates the hot and cold water stored in the bathtub body 102. This allows the hot and cold water to be discharged from the functional unit 110 without overflowing from the bathtub body 102.

[0023] The functional unit 110, for example, discharges hot water toward the neck and shoulders of the bather who has his / her back resting against the backrest surface 106. This makes it possible, for example, to further warm the neck and shoulders of the bather or to provide a massage effect to the bather's neck and shoulders, thereby further enhancing the relaxation effect during bathing.

[0024] The functional part 110 has a slit-shaped water outlet 110a extending in the left-right direction. As a result, the functional part 110 discharges water from the water outlet 110a in a band-shaped water flow extending in the left-right direction. The left-right length of the water outlet 110a is, for example, 20 cm or more. The left-right length of the water outlet 110a is, for example, longer than the average width of a human neck. This allows hot water to be appropriately applied to the neck and shoulders of a bather who has his / her back in contact with the backrest surface 106. In addition, the left-right length of the water outlet 110a is, for example, shorter than the left-right width of the space inside the bathtub main body 102. This allows hot water to be appropriately discharged into the bathtub main body 102.

[0025] The functional unit 110 is not limited to a water discharge unit, and may be, for example, a lighting unit that irradiates light toward the hot and cold water in the bathtub body 102. The functional unit 110 may have, for example, a water discharge function that discharges hot and cold water, and a lighting function that illuminates the discharged hot and cold water. The functional unit 110 may be any device that is attached to the bathtub 100 and used.

[0026] The bathtub pillow 10 is attached to the upper end of the bathtub body 102, which is connected to the backrest surface 106. This allows the bather to take a bath with his / her back against the backrest surface 106 and his / her head on the bathtub pillow 10. By providing the bathtub pillow 10 in this way, the bather can take a bath in a more relaxed position. This further enhances the relaxation effect while bathing.

[0027] In addition, the bathtub pillow 10 is attached to the upper end of the bathtub body 102 so as to cover the functional part 110 from above. When attached to the bathtub body 102, the bathtub pillow 10 covers at least a part of the functional part 110. The bathtub pillow 10 allows the bather's head to be placed on it, while preventing the functional part 110 from being exposed to the outside. This prevents the deterioration of the aesthetic appearance of the bathtub 100 even when the functional part 110 is provided on the bathtub body 102. By providing the bathtub pillow 10 and the functional part 110 in the bathtub 100, it is possible to improve the relaxation effect and the aesthetic appearance.

[0028] The bathtub pillow 10 has a pillow body 12 on which the bather's head can be placed, and an opening 14 provided on the front surface of the pillow body 12. As described above, the pillow body 12 is attached to the top end of the bathtub body 102, and covers the functional part 110 from above.

[0029] The pillow body 12 is attached to the top of the bathtub body 102, for example, in a state where it is fitted or engaged from above with at least one of the bathtub body 102 and the functional part 110. This makes it possible to prevent the pillow body 12 from moving left and right or forward and backward, for example, when the bather places his or her head on the pillow body 12. Therefore, the bather's head can be more appropriately supported.

[0030] In addition, when removing the bathtub pillow 10 from the bathtub body 102, for example, the pillow body 12 is grasped and an upward force is applied to release the fitting or engagement of the pillow body 12. This allows the bathtub pillow 10 to be removed from the bathtub body 102.

[0031] The opening 14 exposes a part of the functional part 110 forward. In this example, the opening 14 exposes at least a part of the water outlet 110a of the functional part 110 forward. The opening 14 is shaped like a slit extending in the left-right direction, similar to the water outlet 110a.

[0032] The hot water discharged from the functional part 110 is discharged into the bathtub body 102 through the water discharge port 110a and the opening 14. In other words, the opening 14 is an opening for draining the hot water discharged from the functional part 110. The bathtub pillow 10 and the functional part 110 discharge the hot water onto the neck and shoulders of the bather with his / her head resting on the pillow body 12. This can further enhance the relaxation effect.

[0033] The opening 14 is not limited to an opening for pouring hot and cold water. For example, when the functional part 110 is a lighting unit, the opening 14 is an opening for passing light emitted from the functional part 110. The opening 14 may be any opening that is provided on the front surface of the pillow body 12 and exposes a part of the functional part 110 forward.

[0034] FIG. 3 is a perspective view that illustrates a bathtub pillow according to an embodiment. FIG. 4 is a bottom view that typically illustrates the bathtub pillow according to the embodiment. FIG. 5 is a cross-sectional view that illustrates a bathtub pillow according to an embodiment. 3 and 4 are schematic diagrams showing the bathtub pillow 10 as viewed from below. Fig. 5 is a schematic diagram showing a cross section taken along line A1-A2 in Fig. 4. As shown in FIG. 3 to FIG. 5, the pillow body 12 of the bathtub pillow 10 includes a support portion 20 and a head rest portion 30. The support portion 20 and the head rest portion 30 are provided with a support member 20 and a head rest portion 30. As shown in FIG.

[0035] The support portion 20 is a portion of the pillow body 12 for supporting the weight of the bather's head. The support portion 20 has a pair of side portions 21, 22 and a rear end portion 24. The side portions 21, 22 extend, for example, in the front-rear direction. The side portion 22 is aligned with the side portion 21 in the left-right direction. The side portion 22 is also spaced apart from the side portion 21 in the left-right direction. Therefore, a space is provided between the side portions 21 and 22. The rear end portion 24 extends in the left-right direction and connects the rear ends of the pair of side portions 21, 22. In other words, the side portions 21, 22 are portions extending forward from the left and right ends of the rear end portion 24 extending in the left-right direction.

[0036] The head rest 30 is provided on the support 20, and forms an upper surface 32 on which the bather's head is placed. The head rest 30 also covers the upper part of the space between the pair of side parts 21, 22, thereby forming a storage space 34 together with the support 20 for storing the functional part 110 of the bathtub 100. The pillow body 12 stores the functional part 110 in the storage space 34 when attached to the top end of the bathtub body 102.

[0037] The opening 14 is continuous with the storage space 34. In other words, the opening 14 exposes at least a portion of the storage space 34 forward. The head rest portion 30, for example, forms the storage space 34 and forms the opening 14 in the front surface of the pillow body 12, exposing at least a portion of the storage space 34 forward.

[0038] In this example, the center of the storage space 34 in the left-right direction is substantially the same as the center of the pillow body 12 in the left-right direction. The center of the storage space 34 in the left-right direction may be shifted to the right or left with respect to the center of the pillow body 12 in the left-right direction.

[0039] The support part 20 and the head rest part 30 are made of a resin material such as polyurethane. The support part 20 and the head rest part 30 have elasticity. The hardness of the head rest part 30 is softer than the hardness of the support part 20.

[0040] The hardness of the support part 20 is, for example, about 60 degrees in Asker C hardness. The hardness of the head rest part 30 is, for example, about 40 degrees in Asker C hardness. This allows the head rest part 30 to obtain cushioning when supporting the bather's head, and allows the support part 20 to properly support the weight of the bather's head. For example, compared to when the entire pillow body 12 is made of a soft material, deformation of the storage space 34 when supporting the bather's head can be suppressed. The hardness of the support part 20 is not limited to the above, and may be any hardness that can properly support the weight of the bather's head. The hardness of the head rest part 30 is not limited to the above, and may be any hardness that can obtain appropriate cushioning when supporting the bather's head.

[0041] The connection line 42 on the storage space 34 side, which represents the outer edge of the connection surface 40 between the rear end portion 24 and the head rest portion 30, is curved and has an inflection point PI. The connection line 42 is, for example, curved and has a plurality of inflection points PI. In addition, at least a portion of the connection line 42 on the storage space 34 side extends, for example, forward of the rear end portion 24 and is located above the storage space 34. The support portion 20 has a protruding portion 26 that protrudes forward from the upper end of the rear end portion 24. The protruding portion 26 is located above the storage space 34 and is in contact with the head rest portion 30. This allows at least a portion of the connection line 42 to be located above the storage space 34, as described above.

[0042] At least the vicinity of the left-right center of the connection line 42 on the storage space 34 side is located forward of the inflection point PI. The vicinity of the left-right center of the connection line 42 on the storage space 34 side is located above the storage space 34. In other words, the connection line 42 is located above the storage space 34 at least near the left-right center of the storage space 34. The protrusion 26 is provided near the left-right center of the storage space 34. At least a portion of the protrusion 26 is located at the left-right center of the storage space 34. Thereby, as described above, at least the vicinity of the left-right center of the connection line 42 on the storage space 34 side can be located forward of the inflection point PI. The vicinity of the left-right center of the connection line 42 on the storage space 34 side can be located above the storage space 34.

[0043] Here, the connection line 42 on the storage space 34 side is, for example, the part of the connection line 42 that appears in the storage space 34 among the connection line 42 that appears almost all around the pillow body 12. Also, the vicinity of the left-right center of the connection line 42 is, for example, the central part of the connection line 42 divided into three parts in the left-right direction. The vicinity of the left-right center of the connection line 42 includes, for example, at least a range of 6 cm in total, 3 cm to the right of the left-right center and 3 cm to the left of the left-right center. The same explanation as for the connection line 42 applies to the vicinity of the left-right center of the storage space 34.

[0044] The connection line 42 on the storage space 34 side has a curved portion 42a that is curved in an arc shape so as to be convex toward the front side. In other words, the front end 26a of the protrusion 26 is curved in an arc shape so as to be convex toward the front side in a top view. The shape of the front end 26a of the protrusion 26 seen from above is, for example, semicircular.

[0045] The apex portion 42b of the curved portion 42a is provided near the center in the left-right direction of the connection line 42 on the storage space 34 side. The apex portion 42b is located, for example, forward of the center CL of the storage space 34 in the front-rear direction. Also, the apex portion 42b is located, for example, rearward of the front end 30a of the head rest portion 30 (the front end of the pillow body 12). That is, the apex portion 42b is provided between the center CL of the storage space 34 in the front-rear direction and the front end 30a of the head rest portion 30. In other words, at least a part of the front end of the connection line 42 is provided between the center CL of the storage space 34 in the front-rear direction and the front end 30a of the head rest portion 30. For example, the vicinity of the center of the front end of the connection line 42 is provided between the center CL of the storage space 34 in the front-rear direction and the front end 30a of the head rest portion 30.

[0046] In this example, the rear end 34a of the storage space 34 is curved in an arc shape so as to be convex toward the rear side in a top view. In other words, the rear end 34a of the storage space 34 is the front end of the rear end portion 24. Therefore, the connection line 42 on the storage space 34 side has a portion (curved portion 42a) that is curved in an arc shape so as to be convex toward the front side in a top view, and a portion (portions on both sides of the curved portion 42a) that is curved in an arc shape so as to be convex toward the rear side. That is, in this example, the connection line 42 on the storage space 34 side is curved with two inflection points PI.

[0047] The backrest surface 106 of the bathtub body 102 is curved in an arc shape toward the rear side in a top view, for example, to make it easier to support the back of the bather. In this case, the front edge of the upper end connected to the backrest surface 106 is also curved in an arc shape toward the rear side in a top view. Therefore, in accordance with these shapes, the front end 30a of the head rest 30 is also curved in an arc shape toward the rear side. This prevents unnecessary steps from occurring between the front end 30a of the head rest 30 and the backrest surface 106, making it easier for the bather to place his / her head on the upper surface 32 of the head rest 30. The rear end 34a of the storage space 34 is curved in an arc shape so as to be convex toward the rear side in a top view, for example, in accordance with the shape of the front end 30a of the head rest 30.

[0048] The shape of the rear end 34a of the storage space 34 seen from above is not limited to an arc shape, and may be, for example, a straight line extending in the left-right direction. The shape of the rear end 34a of the storage space 34 seen from above may be any shape.

[0049] When the connection line 42 on the storage space 34 side is curved with two inflection points PI, it is preferable to make the distance between the two inflection points PI as long as possible. In other words, it is preferable to make the width of the curved portion 42a in the left-right direction as long as possible. It is preferable that the left-right distance between the two inflection points PI is longer than, for example, the left-right distance between one inflection point PI and the side portion 21 and the left-right distance between the other inflection point PI and the side portion 22. The number of inflection points PI is not limited to two and may be three or more.

[0050] The shape of the connection line 42 on the storage space 34 side and the shape of the protrusion 26 are not limited to those described above, and may be any curved shape having an inflection point PI.

[0051] As described above, in the bathtub pillow 10 according to this embodiment, the bathtub pillow 10 is formed with a hard support part 20 and a soft head rest part 30, so that the deformation of the storage space 34 when the bather's head is placed on it can be suppressed without impairing the cushioning properties. The connection line 42 on the storage space 34 side is curved with an inflection point PI. This makes it difficult for a worker to apply a force due to the "leverage principle" from the front end 30a of the head rest part 30 to the connection line 42 when the worker grasps the front end 30a of the head rest part 30 made of a soft material and applies a force upward to remove the bathtub pillow 10 from the bathtub 100. Therefore, compared to the case where a connection line extending linearly in the left-right direction is formed, for example, the head rest part 30 made of a soft material relative to the support part 20 is largely bent from the connection line 42 as a base point, and the occurrence of a fold mark on the upper surface 32 of the head rest part 30 can be suppressed. For example, since the connection line 42 on the storage space 34 side is curved with an inflection point PI, when the head rest 30 is repeatedly bent, it is possible to prevent the head rest 30 from bending at the same point with the connection line 42 as the base point, compared to a straight connection line. For example, the bending point of the head rest 30 can be shifted forward and backward. Therefore, even when the head rest 30 is repeatedly bent, it is possible to prevent a large crease from occurring on the upper surface 32 of the head rest 30. In this way, it is possible to provide a bathtub pillow 10 that can prevent the deformation of the internal storage space 34 without compromising cushioning properties and prevent the crease from occurring on the upper surface 32.

[0052] In addition, the bathtub pillow 10 has an opening 14 provided on the front surface of the pillow body 12. In this case, when removing the bathtub pillow 10 from the bathtub 100, the front end 30a of the head rest part 30 can be easily grasped by hooking the fingers on the opening 14. Even in such a case, as described above, by making the connection line 42 on the storage space 34 side curved with an inflection point PI, it is possible to prevent the upper surface 32 from being folded.

[0053] In addition, in the bathtub pillow 10, at least a part of the connection line 42 on the storage space 34 side is located forward of the center CL in the front-rear direction of the storage space 34. This more reliably prevents the head rest 30 from bending significantly around the connection line 42, resulting in the generation of a crease on the upper surface 32 of the head rest 30.

[0054] In addition, in the bathtub pillow 10, the connection line 42 on the storage space 34 side is located behind the front end 30a of the head rest portion 30. This makes it possible to more reliably prevent the cushioning property from decreasing.

[0055] The vicinity of the center in the left-right direction of the head resting portion 30 is easier to grasp and apply force to than the ends in the left-right direction, so there is a high possibility that a large force will be applied to the head resting portion 30. In addition, when a portion of the front end 30a of the head resting portion 30 near the center in the left-right direction of the storage space 34 is grasped, the distance from the pair of side portions 21, 22 of the support portion 20 becomes longer, so that a force based on the "principle of leverage" is more likely to be applied to the head resting portion 30 than when other portions of the front end 30a of the head resting portion 30 are grasped. Therefore, by positioning the vicinity of the center in the left-right direction of the connection line 42 on the storage space 34 side forward of the inflection point PI as described above, it is possible to make it difficult for a force based on the "principle of leverage" with the connection line 42 as a base point to be applied to the head resting portion 30, even when a portion of the head resting portion 30 near the center of the storage space 34 is grasped. This more reliably prevents head rest portion 30 from bending significantly at connection line 42 , which would otherwise leave creases on upper surface 32 of head rest portion 30 .

[0056] In the bathtub pillow 10, the connection line 42 on the storage space 34 side has a curved portion 42a that is curved so as to be convex toward the front side, and the apex portion 42b of the curved portion 42a is provided near the center in the left-right direction of the connection line 42 on the storage space 34 side. This makes it possible to make it less likely that the force due to the "leverage principle" with the connection line 42 as the base point will be applied to the head rest part 30, even when the part of the head rest part 30 near the center of the storage space 34 is grasped.

[0057] Furthermore, by making the connection line 42 located above the storage space 34 into a continuously and smoothly changing arc shape, the force due to the "leverage principle" based on the connection line 42 is less likely to be applied to the head rest portion 30, compared to, for example, a case in which the connection line 42 has a shape with corners, such as a triangular or rectangular shape.

[0058] FIG. 6 is a bottom view that illustrates a modified example of the bathtub pillow according to the embodiment. In addition, parts that are substantially the same in function and configuration as those in the above embodiment are given the same reference numerals and detailed explanations are omitted. 6, in the bathtub pillow 10a, at least a part of the connection line 42 on the storage space 34 side is located forward of the imaginary line VL connecting the rear ends 21a, 22a of the pair of side parts 21, 22. More specifically, the imaginary line VL is an imaginary line connecting the rear end 21a of the side part 21 on the storage space 34 side and the rear end 22a of the side part 22 on the storage space 34 side.

[0059] In this way, in the bathtub pillow 10a, at least a part of the connection line 42 on the storage space 34 side is located forward of the imaginary line VL. This makes it more difficult for a worker to apply force from the front end 30a of the head rest part 30 made of a soft material to the connection line 42 by applying upward force when trying to remove the bathtub pillow 10a from the bathtub 100, by applying force from the front end 30a of the head rest part 30 to the connection line 42 due to the "leverage principle."

[0060] In the bathtub pillow 10a, a part of the curved portion 42a is located forward of the imaginary line VL. The part of the connection line 42 located forward of the imaginary line VL is not limited to the curved portion 42a, and may be any part.

[0061] FIG. 7 is a bottom view that illustrates a modified example of the bathtub pillow according to the embodiment. As shown in Fig. 7, in the bathtub pillow 10b, at least a part of the connection line 42 on the storage space 34 side is wavy. The connection line 42 is formed in a wavy shape at least in the vicinity of the center in the left-right direction. In the bathtub pillow 10b, the connection line 42 is a curved shape having a plurality of inflection points PI and a plurality of vertices 42b. In other words, the wavy shape is a shape having a plurality of arc-shaped protrusions 26 arranged in the left-right direction.

[0062] In this way, in the bathtub pillow 10b, at least a part of the connection line 42 is wavy, that is, has a shape with multiple inflection points PI and vertices 42b as nodes, so that it is possible to more reliably prevent the head rest part 30 from bending significantly and causing a large crease on the upper surface 32 of the head rest part 30. In addition, in the wavy connection line 42, the multiple vertices 42b are not aligned in a straight line in the left-right direction. This makes it possible to more reliably prevent a large crease from occurring on the upper surface 32 of the head rest part 30. In addition, in the wavy connection line 42, the multiple vertices 42b are not aligned on a curve with the same curvature. In other words, the multiple vertices 42b are not aligned on the same circumference. This makes it possible to more reliably prevent a large crease from occurring on the upper surface 32 of the head rest part 30.

[0063] In this example, the connection line 42 has five vertices 42b. The number of vertices 42b provided on the connection line 42 is not limited to five and may be any number equal to or greater than two. Also, Fig. 7 illustrates a state in which the protrusion amount of each of the protrusions 26 is relatively small. For example, when at least a portion of the connection line 42 is formed into a wave shape, each of the multiple vertices 42b may be positioned forward of the virtual line VL.

[0064] The above describes the embodiments of the present invention. However, the present invention is not limited to these descriptions. Any design modifications made by a person skilled in the art to the above-mentioned embodiments are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the shape, dimensions, materials, arrangement, etc. of each element of the bathtub pillow 10, 10a, 10b, etc. are not limited to those exemplified, and can be modified as appropriate. Furthermore, the elements of each of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they include the features of the present invention. [Explanation of symbols]

[0065] 10, 10a, 10b bathtub pillow, 12 pillow body, 14 opening, 20 support part, 21, 22 side part, 24 rear end part, 26 protruding part, 30 head rest part, 32 upper surface, 34 storage space, 40 connection surface, 42 connection line, 100 bathtub, 102 bathtub body, 104 inner wall surface, 106 backrest surface, 110 functional part

Claims

1. A bathtub pillow for a bathtub including a bathtub body having a backrest surface on the rear side against which the bather's back rests, and a water discharge unit that discharges hot and cold water toward the inside of the bathtub body, the bathtub pillow being attached to the upper end of the rear side of the bathtub body and on which the bather can rest his / her head, The bathtub pillow is A support portion having a pair of left and right side portions extending in the front-rear direction of the bathtub body, and a rear end portion extending in the left-right direction to connect the rear ends of the pair of left and right side portions and having a shape that draws a convex curve toward the rear side; A head rest part having an upper surface on which the head of the bather is placed and covering the support part; Equipped with The head rest portion is softer than the support portion. Bathtub pillow.

2. The bathtub pillow according to claim 1, wherein the bathtub pillow is attached to the top of the upper end of the bathtub body while being fitted or engaged with at least one of the bathtub body and the water spouting unit from above.

3. The bathtub pillow according to claim 1 or 2, wherein a front end of the head rest portion is curved in an arc shape toward the rear side when viewed from above.

4. The head rest portion covers an upper portion of a space between the pair of left and right side portions to form a storage space for storing the water discharge unit, The bathtub pillow according to any one of claims 1 to 3, wherein the rear end of the storage space is curved in an arc shape toward the rear side when viewed from above.

5. The bathtub pillow according to any one of claims 1 to 4, wherein the support portion and the head rest portion are both made of a resin material.

6. A bathtub to which the bathtub pillow according to any one of claims 1 to 5 is attached, the bathtub body and the water discharge unit.

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