JP6801515B2 - Bathtub - Google Patents

Description

Aspects of the present invention generally relate to bathtubs.

A bathtub with a backrest that is tilted at an angle of 45 ° or less with respect to the horizontal direction, and the shape of the bathtub is devised so that the bather can take a bath in a posture that makes him lie on his back by bringing his back into contact with the backrest. (For example, Patent Document 1). In such a bathtub, since the bather can take a bath with his / her upper body tilted so as to lie on his / her back, the relaxation effect at the time of bathing can be enhanced. Hereinafter, in the present specification, a state in which the upper body is tilted down to take a bath while lying on its back is referred to as "sleeping bath".

However, in the sleeping state, the upper body is tilted compared to the normal bathing state in which the waist is bent approximately 90 ° and the bathtub is seated in the bathtub, so when taking a bath (getting out of the bathtub). In addition, it may take a lot of effort.

For example, in order to take a bath from the sleeping state, it is necessary to first raise the upper body from the sleeping state before standing up in the bathtub and taking a bath. At this time, in the sleeping state, the upper body including the shoulders is located in the bathtub, so in order to grasp the rim of the bathtub and raise the upper body, it is necessary to apply a large force to the arm and pull up the upper body. Yes, it may be difficult to get up.

Further, in the sleeping state, a method of raising the upper body by pressing a hand against the backrest portion which is the inner wall of the bathtub located on the back side of the user can be considered. In order to bend the elbows and push the back part by hand while sleeping, it is necessary to open the armpits wide so that the elbows do not interfere with the backrest part. However, if the armpits are wide open, it becomes difficult to apply a large force to the hands, so it may be difficult to raise the upper body.

Japanese Unexamined Patent Publication No. 2006-61502

The present invention has been made based on the recognition of such a problem, and an object of the present invention is to provide a bathtub in which the upper body can be easily raised from the state of sleeping while enabling sleeping.

The first invention comprises a backrest portion having an inclination angle of 45 ° or less with respect to the horizontal direction, right and left shoulder pads provided on both left and right sides of the upper part of the backrest, and the backrest. The right side treatment portion and the left side treatment portion provided on both the left and right sides of the lower portion, and the left and right side treatment portions of the central portion in the vertical direction of the backrest portion are provided to the rear side of the bather whose back is in contact with the backrest portion. It is recessed from the backrest, allowing the bather's elbow to be located on the back side of the backrest when the bather manually presses the right and left treatments to raise the upper body. The bathtub is provided with a right-side groove portion and a left-side groove portion, and the right- side treatment portion and the left-side treatment portion are inclined downward toward the front .

Due to the structure of the human musculoskeletal system, it is preferable to apply force by pressing both hands against the target because it is easy to apply force with both armpits closed. In addition, due to the structure of the human musculoskeletal system, in order to maximize the force of both arms, it is preferable to apply force by pressing both hands against the target with the elbows bent.

According to the bathtub according to the first invention, by providing the right side groove part and the left side groove part, the right side treatment part and the left side treatment part are provided in a state where the elbow is bent toward the back side while suppressing the opening of both armpits as much as possible. Can be pressed by hand, and the force of this pressing allows the bather to easily raise his upper body. In addition, the upper body is raised by pressing the right side treatment part and the left side treatment part where the bather's hands will be arranged in the sleeping state as they are. Therefore, compared to the case where the rim of the bathtub is gripped and the upper body is raised, the power points of the pressing force for getting up are provided at the positions closer to the bather's body, that is, the right side treatment part and the left side treatment part. With less pressing force, the bather can raise his upper body.

Unlike the upper body raising method that grips the rim etc., if the right side treatment part and the left side treatment part in the bathtub where hot water collects are pressed by hand to raise the upper body, the right side treatment part is used to raise the upper body. And when the left side treatment portion is pressed, the hand may slip, or it may be necessary to apply an unnecessary force to balance the hand so that the hand does not slip.

According to the bathtub according to the first invention, the right side treatment part and the left side treatment part are inclined downward so as to be substantially perpendicular to the force required to raise the upper body diagonally upward and forward. Therefore, when the right side treatment part and the left side treatment part are pressed to raise the upper body, it becomes difficult to apply the force along the surfaces of the right side treatment part and the left side treatment part, and the hand slips. The bather can raise his upper body more easily without having to apply unnecessary force to balance his hands so that he does not slip.

In the second invention, in the first invention, the lower portion of the right side groove portion is inclined downward toward the front, and the lower portion of the left side groove portion is inclined downward toward the front, and the right side thereof. The bathtub is characterized in that the inclination angle of the lower portion of the groove portion and the lower portion of the left side groove portion with respect to the horizontal direction is larger than the inclination angle of the right side treatment portion and the left side treatment portion with respect to the horizontal direction.

According to this bathtub, when the right side treatment part and the left side treatment part are pressed to raise the upper body, it is also possible to press the right side groove part and the left side groove part according to the rising angle of the upper body, and the bather can be lifted. You can make your body easier to get up. Further, the inclination angle of the right side groove portion and the left side groove portion is made larger than the inclination angle of the right side treatment part and the left side treatment part so that the plane is substantially perpendicular to the direction in which the force is applied according to the rising angle of the upper body. By doing so, it is possible to make the bather more likely to raise the upper body.

A third invention is a bathtub according to the first or second invention, wherein the right shoulder rest portion and the left shoulder rest portion project flush with or forward from the backrest portion.

According to this bathtub, even when the right groove portion and the left groove portion for inserting the elbow are provided, it is possible to prevent the shoulder of the bather from sinking to the back side of the backrest portion in the sleeping state. it can. As a result, it is possible to comfortably bathe in a more weakened state.

A fourth invention includes a backrest portion having an inclination angle of 45 ° or less with respect to the horizontal direction, a shoulder pad portion provided on either the left side or the right side of the upper part of the backrest portion, and the left side of the lower part of the backrest portion. Alternatively, the backrest portion provided on one of the right side and the left or right side of the central portion in the vertical direction of the backrest portion, and the backrest portion is provided on the rear side of the bather whose back is in contact with the backrest portion. dent than the time to cause the body bather presses the allowance portion by hand, with the elbow of the bather and a groove that enables positioned on the rear side of the backrest, the The treatment portion is a bathtub characterized in that it is inclined downward toward the front .

According to this bathtub, by providing the groove portion, it is possible to manually press the treatment portion with the elbow bent toward the back side while suppressing the opening of the axilla as much as possible. The bather can easily raise his upper body. In addition, the upper body is raised by pressing the treatment portion where the bather's hand will be arranged as it is in the sleeping state. Therefore, compared to the case where the rim of the bathtub is gripped and the upper body is raised, the force point of the force to press for getting up is provided at the position close to the bather's body, which is the treatment part, so that the pressing force is smaller. The bather can raise his upper body.

According to this bathtub, the upper body is raised because the treatment part is inclined downward so that the surface is substantially perpendicular to the force required to raise the upper body diagonally upward and forward. Therefore, when the treatment part is pressed, it becomes difficult to apply the force along the surface of the treatment part, and it is necessary to apply unnecessary force to balance the hand so that it does not slip or slip. The bather can raise his upper body more easily.

In the fifth aspect of the invention, in the fourth invention, the lower portion of the groove portion is inclined downward toward the front, and the inclination angle of the lower portion of the groove portion with respect to the horizontal direction is the inclination angle of the treatment portion with respect to the horizontal direction. It is a bathtub characterized by being larger than.

According to this bathtub, when the treatment portion is pressed to raise the upper body, it is also possible to press the groove portion according to the angle at which the upper body rises, which makes it easier for the bather to raise the upper body. .. Furthermore, by making the inclination angle of the groove portion larger than the inclination angle of the treatment portion so that the surface is substantially perpendicular to the direction in which the force is applied according to the rising angle of the upper body, the bather can be further raised. It can make the body easier to get up.

A sixth aspect of the invention is the bathtub according to the fourth or fifth aspect , wherein the shoulder rest portion is flush with the backrest portion or projects forward.

According to this bathtub, even when a groove for inserting an elbow is provided, it is possible to prevent the shoulder of the bather from sinking to the back side of the backrest portion in the sleeping state. As a result, it is possible to comfortably bathe in a more weakened state.

According to the aspect of the present invention, there is provided a bathtub in which the upper body can be easily raised from the state of sleeping while enabling sleeping.

It is a perspective view which shows typically the bathtub which concerns on embodiment. It is a perspective view which shows typically the bathtub which concerns on embodiment. It is a top view which shows a part of the bathtub which concerns on embodiment. It is sectional drawing which shows a part of the bathtub which concerns on embodiment schematically. It is sectional drawing which enlarges and represents a part of the bathtub which concerns on embodiment. It is sectional drawing which shows a part of the bathtub which concerns on embodiment schematically. It is sectional drawing which enlarges and shows typically the part of the pillow part of the bathtub which concerns on embodiment. 8 (a) to 8 (c) are cross-sectional views schematically showing an enlarged portion of the pillow portion of the bathtub according to the embodiment. 9 (a) and 9 (b) are cross-sectional views schematically showing an enlarged portion of the pillow portion of the bathtub according to the embodiment. It is a perspective view which shows a part of the bathtub which concerns on embodiment schematically. 11 (a) and 11 (b) are perspective views schematically showing a part of the bathtub according to the embodiment. It is a perspective view which shows typically the water discharge part of the bathtub which concerns on embodiment. It is sectional drawing which shows typically the water discharge part of the bathtub which concerns on embodiment. It is a front view which shows typically the water discharge part of the bathtub which concerns on embodiment. It is a perspective view which shows an example of the use state of the bathtub which concerns on embodiment schematically. 16 (a) to 16 (l) are explanatory views schematically showing an example of the procedure for bathing in the bathtub according to the embodiment. It is a top view which shows a part of a reference bathtub schematically. It is a top view which shows the modification of the bathtub which concerns on embodiment schematically. It is sectional drawing which shows typically the modification of the bathtub which concerns on embodiment. It is sectional drawing which shows typically the modification of the bathtub which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.
1 and 2 are perspective views schematically showing the bathtub according to the embodiment.
As shown in FIGS. 1 and 2, the bathtub 10 includes a bathtub body 12. The bathtub body 12 has a bottom surface portion 14 and a side surface portion 16. The side surface portion 16 surrounds the bottom surface portion 14 and extends upward from the bottom surface portion 14. More specifically, the side surface portion 16 surrounds the outer edge of the bottom surface portion 14. As a result, in the bathtub 10, hot water can be stored in the space SP inside the bathtub body 12 surrounded by the bottom surface portion 14 and the side surface portion 16, and bathing can be performed in the bathtub body 12.

The side surface portion 16 has a first inner side surface 21 and a second inner side surface 22. The first inner surface 21 has a backrest portion 30 that supports the back of the bather. The second inner surface 22 is arranged at a position facing the first inner surface 21. That is, the second inner side surface 22 is the inner side surface on the leg side of the bather whose back is brought into contact with the backrest portion 30. The bather can take a bath with his / her back in contact with the backrest portion 30.

Here, in the present specification, the upper part is referred to as "upper", the lower part is referred to as "lower", the front is referred to as "front", and the rear is referred to as "rear" when viewed from the bather whose back is brought into contact with the backrest portion 30. , The right side is "right side" and the left side is "left side".

The backrest portion 30 has, for example, an inclination angle of 45 ° or less with respect to the horizontal direction. As a result, in the bathtub 10, it is possible to take a sleeping bath in which the upper body is tilted so as to lie on its back.

The shape of the bathtub body 12 viewed from above is an elliptical shape that is long in the front-rear direction. The shape of the bathtub body 12 viewed from above is not limited to an elliptical shape, but may be a rectangular shape, a square shape, a circular shape, or the like. The shape of the bathtub body 12 may be any shape that enables sleeping.

The bathtub 10 may be a single bathtub used for a built-in bath or the like, or a bathtub used for a unit bath (system bath). The bathtub 10 may be installed by any method such as a stationary type, an embedded type, or a semi-embedded type.

The bottom surface portion 14 has a first bottom surface 41, a second bottom surface 42, and a support portion 44. The first bottom surface 41 is provided between the first inner side surface 21 and the second inner side surface 22. The second bottom surface 42 is provided between the first bottom surface 41 and the second inner surface surface 22. The support portion 44 is provided between the first bottom surface 41 and the second bottom surface 42.

The first bottom surface 41 is a surface on which the buttocks of a bather in a sleeping state are placed. The support portion 44 is provided in front of the user whose back is in contact with the backrest portion 30 rather than the backrest portion 30 and the first bottom surface 41, and suppresses the movement of the buttocks of the bather in the sleeping posture forward. Therefore, it is formed so as to project upward from the first bottom surface 41. That is, the support portion 44 supports the buttocks of the bather in the sleeping posture. The second bottom surface 42 is a mounting portion provided in front of the support portion 44 and at a position higher than the first bottom surface 41 for mounting the legs of the bather.

In this way, the second bottom surface 42 is provided at a position higher than the first bottom surface 41, and the position of the bather's legs is set higher than the position of the buttocks. As a result, the posture of the bather in the sleeping state can be brought closer to the posture that places the least burden on the body due to the structure of the human musculoskeletal system (hereinafter referred to as "neutral posture"). It is possible to weaken the bather in the sleeping state and further enhance the relaxation effect.

The bathtub body 12 further includes a pillow portion 50, a drain port 51, an overflow port 52, injection ports 53 and 54, and a suction port 55.

The pillow portion 50 is provided on the backrest portion 30 of the side surface portion 16 so as to be movable in the vertical direction and the front-rear direction over a predetermined range. The pillow portion 50 has a head mounting surface 50a on which the back of the head of the bather can be placed with the face facing upward. In the bathtub 10, the position of the head mounting surface 50a can be adjusted according to the height of the bather or the like by moving the pillow portion 50 up and down and back and forth along the inclination of the backrest portion 30. The portion of the pillow portion 50 below the head mounting surface 50a is curved in a convex curved surface shape (see FIG. 7). The lower curved surface portion of the head mounting surface 50a is formed into a curved surface shape that easily fits the base of the bather's neck. This makes it easier to support the bather's head more appropriately.

The pillow portion 50 has a spout 50b. The spout 50b is provided below the head mounting surface 50a. The water spout 50b discharges hot water toward the neck of the bather with the back of the head placed on the head mounting surface 50a. Thereby, for example, the neck of a bather in a sleeping state can be warmed. In addition, a part of the hot water discharged from the spout 50b hits the neck of the bather and also the shoulders and chest of the bather. Thereby, for example, it is possible to make it easier to warm the upper body of the bather in the sleeping state.

The spout 50b is formed in a slit shape long in the left-right direction. The spout 50b discharges a strip-shaped water stream extending in the left-right direction. The length of the spout 50b in the left-right direction is, for example, about 20 cm to 30 cm. The lateral length of the spout 50b is, for example, longer than the average width of the human neck. As a result, it is possible to appropriately apply hot water to the neck of the bather in a sleeping state, and it is possible to easily apply hot water to the shoulders and chest of the bather.

The drainage port 51 is provided on the first bottom surface 41 of the bottom surface portion 14. That is, the drain port 51 is provided at the lowest position in the space SP inside the bathtub body 12. The drain port 51 is provided with, for example, a drain plug that opens and closes the drain port 51. By closing the drain port 51 with a drain plug, hot water can be stored in the bathtub body 12. Then, by opening the drain port 51, the hot water collected in the bathtub body 12 can be discharged to the outside.

The overflow port 52 is provided in the upper part of the second inner side surface 22. The position of the overflow port 52 is not limited to the second inner side surface 22, and may be any position on the side surface portion 16. The overflow port 52 communicates with the overflow pipe 60 (see FIG. 6), and when the water level in the bathtub body 12 (in the space SP) reaches the height of the overflow port 52, the hot water is overflowed. Flow to 60. The overflow pipe 60 allows the hot water flowing from the overflow port 52 to flow to an external drain pipe or the like. As a result, it is possible to prevent hot water from overflowing to the outside of the bathtub body 12.

In this way, the lower end of the overflow port 52 functions as a regulating portion that regulates the overflow water level of the hot water stored in the space surrounded by the bottom surface portion 14 and the side surface portion 16. The defining portion is not limited to the lower end of the overflow port 52, and may be, for example, the rim of the bathtub body 12 (the upper end of the bathtub body 12).

The injection port 53 is provided at the lower part of the backrest portion 30. The injection port 53 injects hot water toward the waist of a bather in a sleeping state. As a result, the waist of the bather can be stimulated and the relaxation effect can be further enhanced. In this example, the injection port 53 injects hot water aiming at the position of the erector spinae muscle, which is the anti-gravity muscle of the bather. Further, in this example, the bathtub main body 12 has two injection ports 53 arranged side by side. The number of injection ports 53 is not limited to two, and may be one or three or more.

The injection port 54 is provided on the second bottom surface 42. In this example, the bathtub body 12 has a total of six injection ports 54, two on the left and right and three on the front and back. Each injection port 54 is arranged in a V shape so as to expand toward the front. Each injection port 54 injects air bubbles toward the legs of a bather in a sleeping state. As a result, the legs of the bather can be stimulated and the relaxation effect can be further enhanced. The number of injection ports 54 is not limited to six, and may be any number.

The suction port 55 is provided below the overflow port 52 on the second inner side surface 22. The position of the suction port 55 may be any position below the overflow port 52. The suction port 55 sucks hot water stored in the bathtub body 12. The bathtub 10 sucks the hot water stored in the bathtub body 12 from the suction port 55, discharges the sucked hot water from the water discharge port 50b of the pillow portion 50, and injects the hot water from the injection port 53. That is, the bathtub 10 circulates the hot water in the bathtub body 12 to discharge the hot water from the spout 50b and jet the hot water from the jet 53.

FIG. 3 is a plan view schematically showing a part of the bathtub according to the embodiment.
FIG. 4 is a cross-sectional view schematically showing a part of the bathtub according to the embodiment.
FIG. 4 corresponds to the A1-A2 line cross section of FIG.
As shown in FIGS. 3 and 4, the first inner side surface 21 further includes a right shoulder rest 31, a left shoulder rest 32, a right shoulder rest 33, a left care portion 34, a right groove portion 35, and a left groove portion 36. Have.

The right shoulder rest 31 and the left shoulder rest 32 are provided on both the left and right sides of the upper part of the backrest 30. The right shoulder rest 31 and the left shoulder rest 32 support the shoulders of a bather in a sleeping state. The right shoulder rest 31 and the left shoulder rest 32 are formed integrally with, for example, the backrest 30. Therefore, the right shoulder rest 31 and the left shoulder rest 32 are flush with the backrest 30. The right shoulder rest 31 and the left shoulder rest 32 are flush with the backrest 30 in the left-right direction. Here, "plane" means, for example, a state in which the difference in height between the highest point and the lowest point of the two surfaces is 10 mm or less in a cross section in a plane parallel to the horizontal direction and the vertical direction. .. The right shoulder rest 31 and the left shoulder rest 32 may protrude forward from the backrest 30. The right shoulder rest 31 and the left shoulder rest 32 may have any shape that can support the shoulders of a bather in a sleeping state.

The right side treatment part 33 and the left side treatment part 34 are provided on both left and right sides of the lower part of the backrest part 30. The right side treatment part 33 and the left side treatment part 34 allow the hands of a bather in a sleeping state to be placed.

As shown in FIG. 4, the left side treatment portion 34 is inclined downward toward the front. The shape of the right side treatment portion 33 is symmetrical with the shape of the left side treatment portion 34. Therefore, the right side treatment portion 33 is also inclined downward toward the front like the left side treatment portion 34.

The right groove portion 35 and the left groove portion 36 are provided on both the left and right sides of the central portion in the vertical direction of the backrest portion 30. The right groove portion 35 and the left groove portion 36 are recessed from the backrest portion 30 toward the rear side of the bather whose back is brought into contact with the backrest portion 30. The right groove portion 35 and the left groove portion 36 are recessed from the backrest portion 30 in a direction orthogonal to the surface of the backrest portion 30, for example. In other words, the right groove portion 35 and the left groove portion 36 are recessed on the back side of the backrest portion 30.

As a result, when the bather presses the right side treatment portion 33 and the left side treatment portion 34 by hand to raise the upper body, the right side groove portion 35 and the left side groove portion 36 have the bather's elbows on the back side of the backrest portion 30. Allows you to be located. In other words, the right groove portion 35 and the left groove portion 36 allow the bather's elbows to be stored when the bather manually presses the right treatment portion 33 and the left treatment portion 34 to raise the upper body.

As shown in FIG. 4, the lower portion of the left groove portion 36 is inclined downward toward the front and is continuous with the left treatment portion 34. That is, the left side treatment portion 34 and the left side groove portion 36 form an inclined surface that continuously inclines downward toward the front. The shape of the right groove portion 35 is symmetrical with the shape of the left groove portion 36. The lower portion of the right groove portion 35 is inclined downward toward the front and is continuous with the right treatment portion 33, similarly to the left groove portion 36.

The horizontal inclination angles of the lower part of the right side groove 35 and the lower part of the left side groove 36 are larger than the horizontal inclination angles of the right side treatment portion 33 and the left side treatment portion 34. The right side treatment portion 33, the left side treatment portion 34, the right side groove portion 35, and the left side groove portion 36 have, for example, a concave curved surface shape recessed on the back surface side. Therefore, the inclination angle of the right groove portion 35 is larger than the inclination angle of the right treatment portion 33. The inclination angle of the left groove portion 36 is larger than the inclination angle of the left treatment portion 34.

The inclination angle of the right side treatment portion 33 and the left side treatment portion 34 with respect to the horizontal direction is, for example, 10 ° or more. The inclination angle of the lower part of the right groove portion 35 and the lower part of the left groove portion 36 with respect to the horizontal direction is, for example, 10 ° or more. The right side treatment portion 33, the left side treatment portion 34, the right side groove portion 35, and the left side groove portion 36 are not limited to a curved surface shape, but may be a linear inclined surface shape.

The depth DN of the right groove portion 35 and the left groove portion 36 from the backrest portion 30 is, for example, 2 cm or more and 20 cm or less. As a result, when the upper body is raised, the elbow of the bather can be properly stored, and the right side groove 35 and the left side groove 36 become excessively deep, and the right side groove part 35 and the left side groove part 36 can be touched. It is possible to prevent the elbow from becoming difficult to attach. For example, the upper body of the bather can be made easier to raise.

As shown in FIG. 4, the first bottom surface 41 is substantially horizontal in the front-rear direction. In other words, the first bottom surface 41 is a horizontal portion that is provided between the backrest portion 30 and the support portion 44, is connected to the lower end of the support portion 44, and is horizontal in the front-rear direction. Here, "horizontal" means, for example, a state in which the angle of the line segment connecting the highest point and the lowest point in the plane is 10 ° or less.

The support portion 44 is inclined upward toward the front. The angle of inclination of the support portion 44 with respect to the horizontal direction is larger than the angle of inclination of the backrest portion 30 with respect to the horizontal direction at the same height. As described above, the inclination angle of the backrest portion 30 with respect to the horizontal direction is 45 ° or less. On the other hand, the inclination angle of the support portion 44 with respect to the horizontal direction is, for example, larger than 45 ° and smaller than 90 °.

The lower end 30a of the backrest portion 30 is connected to the first bottom surface 41 which is a horizontal portion. The inclination angle of the backrest portion 30 with respect to the horizontal direction is the horizontal direction of the support portion 44 at the same height over the entire area from the position 30b at the same height as the upper end 44a of the support portion 44 to the first bottom surface 41 (lower end 30a). Less than the tilt angle with respect to.

In this example, the first bottom surface 41 is also horizontal in the left-right direction (see FIG. 3). The first bottom surface 41 is substantially a horizontal plane. The length L2 of both side portions of the first bottom surface 41 in the front-rear direction is longer than the length L1 of the central portion of the first bottom surface 41 in the front-rear direction. The first bottom surface 41 may have an inclination of about several degrees toward the drainage port 51, for example. The first bottom surface 41 may have a so-called drainage gradient.

Further, in this example, the second bottom surface 42, which is a mounting portion for mounting the legs of the bather, is also substantially horizontal. The second bottom surface 42 is a horizontal plane that is substantially horizontal in the front-rear direction and the left-right direction. In the bottom surface portion 14, the front side of the support portion 44 is horizontal throughout.

FIG. 5 is an enlarged sectional view schematically showing a part of the bathtub according to the embodiment.
As shown in FIG. 5, the backrest portion 30 has a first region R1 and a second region R2. The second region R2 is continuously provided above the first region R1. Further, the backrest portion 30 has a bending line FL. The bending line FL is provided at the boundary portion between the first region R1 and the second region R2. The second region R2 is bent with respect to the first region R1. The bending line FL is a portion of the backrest portion 30 that is bent so that the inclination angle changes, and extends linearly in the left-right direction. The bending line FL is provided at a position higher than the upper end 44a of the support portion 44, for example. Here, "bending" is, for example, a state in which two surfaces having different inclination angles are connected via a roundness or chamfer having a radius of 2 cm or less.

The inclination angle θ2 of the second region R2 with respect to the horizontal direction is larger than the inclination angle θ1 of the first region R1 with respect to the horizontal direction. The inclination angle θ1 of the first region R1 is, for example, 10 ° or more and 45 ° or less. The inclination angle θ2 of the second region R2 is, for example, an angle obtained by adding an angle of 5 ° or more and 30 ° or less to the angle of the inclination angle θ1.

The first region R1 and the second region R2 may have an inclined surface shape or a curved surface shape. Further, the backrest portion 30 does not necessarily have to be bent. The backrest portion 30 may have a concave curved surface shape that is recessed downward, for example. As a result, the inclination angle of the upper portion of the backrest portion 30 can be made larger than the inclination angle of the lower portion of the backrest portion 30 as in the case of bending. The backrest portion 30 may have any shape in which the inclination angle differs between the lower portion and the upper portion. For example, in a cross section parallel to the front-rear direction and the vertical direction, the inclination angle of the line segment connecting the lower end and the upper end of the first region R1 with respect to the horizontal direction is the horizontal direction of the line segment connecting the lower end and the upper end of the second region R2. It may be different from the tilt angle with respect to.

The backrest portion 30 has a steeply inclined portion 38. The steeply inclined portion 38 is provided between the lower center of the backrest portion 30 and the first bottom surface 41. The inclination angle of the steeply inclined portion 38 with respect to the horizontal direction is larger than the inclination angle of the lower center of the backrest portion 30 with respect to the horizontal direction. The inclination angle θ1 of the first region R1 is, for example, the inclination angle of a portion of the first region R1 above the steeply inclined portion 38.

The pillow portion 50 is provided in the second region R2. The pillow portion 50 moves up and down and back and forth within a predetermined range MA1 in the second region R2. In other words, the pillow portion 50 moves in the inclined direction of the backrest portion 30 within the predetermined range MA1. In FIG. 5, the pillow portion 50 is in the highest position. The distance ML that the pillow portion 50 moves along the backrest portion 30 is, for example, 155 mm or more.

The bending line FL is provided below the lower end of the pillow portion 50 at the lowest position with a predetermined interval DT. The predetermined interval DT is, for example, 100 mm or more. More specifically, the predetermined interval DT is 100 mm or more in the length along the backrest portion 30. The predetermined interval DT is more preferably 140 mm or more and 200 mm or less in the length along the backrest portion 30.

Further, as shown in FIG. 5, by making the inclination angle of the second region R2 larger than the inclination angle of the first region R1, the first region R1 gives the bather a feeling of sleeping and the second region. The back (spine) of the bather can be bent by R2. As a result, the bather presses his / her body against the backrest 30 and the support 44 by utilizing the "spring force F of the back that tries to straighten the back" that works unconsciously on the bather when the back is bent. You can gain power.

The support portion 44 supports the buttocks of the bather in the sleeping state, and applies a force f1 to the bather's body (buttocks) in the direction opposite to the direction in which the bather's body slides down along the inclination of the backrest portion 30. Further, the pillow portion 50 supports the lower BBH (base portion between the head and neck) of the back of the head of the bather in the sleeping state, and the direction in which the bather's body slides down along the inclination of the backrest portion 30 is opposite to that of the bather. The force f2 of is applied to the body (head) of the bather. That is, the lower BBH of the back of the head is caught on the pillow portion 50 in the sliding direction.

In this way, while supporting the buttocks of the bather with the support portion 44, the back of the bather is appropriately bent, and the spring force F of the back that works unconsciously by the bather is used to support the bather in the backrest portion 30. Press on. As a result, the bather can be appropriately weakened, and the bather can be made to sleep in a more relaxed state. Further, by hooking the lower part BBH of the back of the head of the bather on the pillow portion 50, the bather can be made to weaken more and to take a sleeping bath in a more relaxed state.

The shape of the pillow portion 50 may be at least an arbitrary shape on which the lower BBH of the back of the head of the bather can be placed (supported). The head mounting surface 50a may be a surface having an arbitrary shape on which the lower BBH of the back of the head of the bather with the face facing upward can be placed. For example, in a state where the lower BBH of the occipital region of the bather is placed on the pillow portion 50, the occipital point MBP (the most posterior protruding portion of the occipital region) of the bather is in contact with the backrest portion 30. May be good.

It is preferable that the bending line FL is arranged at a position where the back of the bather is bent as close to the waist of the bather as possible. This makes it possible to prevent the bather from feeling suffocating due to the bending of the back, as compared with the case where the back of the bather is bent at a position close to the chest of the bather, for example. You can relax more and let the bather take a bath.

FIG. 6 is a cross-sectional view schematically showing a part of the bathtub according to the embodiment.
FIG. 6 corresponds to the B1-B2 line cross section of FIG.
As shown in FIG. 6, the lower end of the overflow port 52, which is a regulation portion that regulates the overflow water level OFL in the bathtub main body 12, is the head mounting surface 50a in a state where the pillow portion 50 is arranged at the lowest position. It is provided below the position H2, which is 120 mm higher than the position H1. More specifically, the position H1 is the position of the lower end of the head mounting surface 50a in the state where the pillow portion 50 is arranged at the lowest position.

The 5% tile value of the length HL from the occipital region (occipital point MBP) to the mouth of an adult Asian woman who is relatively short in the world is about 195 mm. The length HL is, more specifically, the length from the occipital point MBP to the mouth in the direction perpendicular to the front face value (the plane that divides the human body into the ventral and dorsal sides). In other words, it is the length in the anteroposterior direction (horizontal direction) from the occipital point MBP of a human being upright and facing the front to the mouth. Considering the inclination of the sleeping bath and the state in which the chin is pulled, the length in the height direction from the head resting surface 50a to the mouth is not smaller than about 120 mm. Therefore, the overflow port 52 is provided below the position H2, which is 120 mm higher than the position H1 of the head mounting surface 50a in the state where the pillow portion 50 is arranged at the lowest position. As a result, even when a bather with a relatively small physique adds hot water to the bathtub body 12 with the height of the pillow 50 at the lowest position, the water level of the hot water in the bathtub body 12 is the mouth of the bather. It is possible to prevent the bather from being uncomfortable.

It is preferable that the lower end (regulated portion) of the overflow port 52 sets the overflow water level OFL between the position H1 and the position H2, for example. This prevents the shoulders and chest of the bather from protruding too much above the water surface, for example, when a relatively tall bather takes a bath with the height of the pillow 50 at the highest position. be able to. Therefore, it is possible to comfortably bathe bathers of various physiques.

As shown in FIG. 6, the bathtub 10 further includes an overflow pipe line 60, a pump 62, and circulation pipes 64 and 66.

The overflow pipe line 60 is connected to the overflow port 52. Further, the overflow pipe line 60 can be connected to a drainage pipe 68 connected below the drainage port 51. The overflow pipe 60 causes the hot water flowing from the overflow port 52 to flow into the drain pipe 68.

The pump 62 is connected to the suction port 55 via the circulation pipe 64, and is also connected to the pillow portion 50 and the injection port 53 via the circulation pipe 66. The pump 62 supplies the hot water sucked from the suction port 55 to the pillow portion 50 and the injection port 53. As a result, hot water is discharged from the water discharge port 50b of the pillow portion 50 and hot water is sprayed from the injection port 53 in response to the drive of the pump 62. In other words, the pump 62 is a pump for circulating hot water in the space SP of the bathtub body 12. The circulation pipes 64 and 66 are connected to the pump 62 and pass hot water to be circulated.

The pump 62 is provided, for example, in the space below the second bottom surface 42. By arranging the pump 62 below the second bottom surface 42 and away from the backrest portion 30, it is difficult for the bather to hear the operating sound of the pump 62, and the relaxing effect due to the operating sound of the pump 62 is reduced. Can be suppressed. Further, by arranging the pump 62 in the space below the second bottom surface 42, it is not necessary to reduce the lengths of the front, back, left and right inside the bathtub body 12, and the area inside the bathtub body 12 can be secured.

In this example, hot water is discharged from each of the water discharge port 50b and the injection port 53 of the pillow portion 50 by driving one pump 62. For example, by providing a three-way valve or the like at the branch portion between the spout 50b and the injection port 53, hot water may be selectively supplied to only one of the spout 50b and the injection port 53. Alternatively, hot water may be discharged from only one of the spout 50b and the injection port 53 by individually providing a pump for each of the spout 50b and the injection port 53.

FIG. 7 is a cross-sectional view schematically showing an enlarged portion of the pillow portion of the bathtub according to the embodiment.
As shown in FIG. 7, the bathtub 10 further includes a support portion 80, a shaft portion 82, and a water discharge portion 84. The bathtub 10 has, for example, two support portions 80 arranged side by side in the vertical direction and the front-rear direction. The support portion 80 is provided on the backrest portion 30 of the bathtub body 12. The support portion 80 is arranged in the backrest portion 30 above the overflow water level OFL defined by the overflow port 52.

8 (a) to 8 (c) are cross-sectional views schematically showing an enlarged portion of the pillow portion of the bathtub according to the embodiment.
FIG. 8A corresponds to the C1-C2 line cross section of FIG.
FIG. 8B corresponds to the D1-D2 line cross section of FIG. 8A.
As shown in FIGS. 8A and 8B, the support portion 80 has a protrusion 80a, a stored portion 80b, and a screw 80c. The protruding portion 80a protrudes from the backrest portion 30. The protruding portion 80a protrudes in a direction perpendicular to the backrest portion 30, for example. The protruding portion 80a has a substantially cylindrical shape. The protrusion 80a is attached to the bathtub body 12 via the screw 80c. That is, the support portion 80 is screwed to the bathtub body 12. The method of attaching the support portion 80 is not limited to the above, and any method that can be attached to the bathtub body 12 may be used. The shape of the protruding portion 80a is not limited to a cylindrical shape, and may be any shape.

The stored portion 80b is attached to the upper portion of the protruding portion 80a at a predetermined distance from the bathtub main body 12. The stored portion 80b projects at least in the left-right direction from the tip end side of the protruding portion 80a. The shape of the stored portion 80b viewed from above is, for example, a circular shape. Therefore, in this example, the stored portion 80b protrudes from the tip end side of the protruding portion 80a in the left-right direction and the front-back direction. The shape of the stored portion 80b may be any shape that protrudes at least in the left-right direction from the tip end side of the protruding portion 80a.

The left and right ends of the stored portion 80b have elasticity. An elastic material such as rubber is used for the stored portion 80b. In this case, substantially the entire housing portion 80b has elasticity.

The shaft portion 82 extends in the vertical direction and the front-rear direction, and is supported by the support portion 80 so as to be movable in the vertical direction only in a part of the vertical direction and the front-rear direction. It moves along the backrest portion 30 over MA2 (see FIG. 9). That is, the shaft portion 82 moves in the inclined direction of the backrest portion 30.

The shaft portion 82 has a tubular portion 82a and an opening 82b. The tubular portion 82a is provided in a tubular shape so that at least a part of the protruding portion 80a can be stored. The tubular portion 82a has a tubular shape capable of accommodating the stored portion 80b of the support portion 80. In other words, the stored portion 80b is a portion of the protruding portion 80a that is stored in the tubular portion 82a. The tubular portion 82a has, for example, a square tubular shape. The shape of the tubular portion 82a may be any shape corresponding to the shape of the stored portion 80b or the like.

The opening 82b is provided on the backrest 30 side of the tubular portion 82a. The opening 82b extends in the vertical and front-rear directions. In other words, the opening 82b opens the tubular portion 82a downward. The opening 82b allows the protrusion 80a to be inserted while the tubular portion 82a accommodates the stored portion 80b. As a result, the opening 82b makes the tubular portion 82a movable in the vertical direction and the front-rear direction along the backrest portion 30.

The width of the opening 82b (width in the left-right direction) is larger than the width of the protrusion 80a and smaller than the width of the stored portion 80b. As a result, the stored portion 80b can be stored in the tubular portion 82a, and the protruding portion 80a can be inserted into the opening 82b. The stored portion 80b housed in the tubular portion 82a engages with the tubular portion 82a in the left-right direction. As a result, the movement of the shaft portion 82 in the left-right direction is restricted. Further, a part of the tubular portion 82a is inserted between the stored portion 80b and the backrest portion 30. As a result, the movement of the shaft portion 82 in the direction perpendicular to the backrest portion 30 is restricted. That is, it is possible to prevent the shaft portion 82 from coming off the support portion 80 in the direction perpendicular to the backrest portion 30. Therefore, the shaft portion 82 can move only in the vertical direction and the front-rear direction (inclination direction of the backrest portion 30).

The left and right inner side surfaces S1 and S2 of the tubular portion 82a (shaft portion 82) are formed in a planar shape. The support portion 80 presses the left and right inner side surfaces S1 and S2 formed in a plane shape of the tubular portion 82a at the left and right ends E1 and E2 of the stored portion 80b to push the shaft portion 82 in the vertical direction and in the front-rear direction. Supports slidable in the direction. The widths of the left and right inner side surfaces S1 and S2 of the tubular portion 82a are slightly narrower than the widths of the left and right end portions E1 and E2 of the stored portion 80b (diameter of the stored portion 80b). The tubular portion 82a stores the stored portion 80b in the internal space, and slightly elastically deforms the stored portion 80b. As a result, the left and right end portions E1 and E2 of the stored portion 80b can press the left and right inner side surfaces S1 and S2 of the tubular portion 82a.

The length L11 of the stored portion 80b in the direction perpendicular to the backrest portion 30 is shorter than the length L12 in the direction perpendicular to the backrest portion 30 inside the tubular portion 82a. As a result, the shaft portion 82 moves in the direction perpendicular to the backrest portion 30 by the difference between the length L11 and the length L12 in the state where the stored portion 80b is stored in the tubular portion 82a. Can be done. That is, the support portion 80 supports the shaft portion 82 so as to be movable in the vertical direction and the front-rear direction, and also supports the shaft portion 82 so as to be movable in the direction perpendicular to the backrest portion 30.

In this example, two support portions 80 are provided side by side in the front-rear direction. The number of support portions 80 may be one or three or more. The number of the support portions 80 may be any number that can movably support the shaft portion 82. The shape of the support portion 80 and the shape of the shaft portion 82 are not limited to the above, and may be any shape capable of moving the shaft portion 82. For example, as shown in FIG. 8C, the left and right outer surfaces S3 and S4 of the shaft portion 82 are formed in a plane shape, and the left and right outer surfaces S3 and S4 formed in a plane shape are pressed. The shaft portion 82 may be slidably supported. That is, the shaft portion 82 may be sandwiched and slidably supported. In this case, the shaft portion 82 may be sandwiched between one support portion 80, or the shaft portion 82 may be sandwiched between a pair of support portions 80 as shown in FIG. 8C.

9 (a) and 9 (b) are cross-sectional views schematically showing an enlarged portion of the pillow portion of the bathtub according to the embodiment.
As shown in FIGS. 7, 9 (a) and 9 (b), the pillow portion 50 is attached to the shaft portion 82. As a result, the pillow portion 50 is moved in the front-rear direction and the up-down direction along the inclination of the backrest portion 30 between the highest position shown in FIG. 9A and the lowest position shown in FIG. 9B. Moving. Further, the pillow portion 50 and the shaft portion 82 can be stopped at an arbitrary position between the highest position and the lowest position by the frictional force generated between each stored portion 80b and the shaft portion 82.

The slidable support of the shaft portion 82 by the support portion 80 is not limited to the configuration using frictional force. For example, in the configuration of the support portion 80, the shaft portion 82 is engaged with the shaft portion 82 by using a latch mechanism, a gear mechanism, or the like, and the shaft portion 82 is slid while changing the engaging state (engagement position) by applying a force. As a result, the shaft portion 82 may be stopped at an arbitrary position between the highest position and the lowest position. As described above, the support portion 80 may be one that slidably supports the shaft portion 82 by engaging and mounting.

The water spouting unit 84 spouts water to the neck of the bather. The water discharge portion 84 is provided below the head mounting surface 50a of the pillow portion 50. The water discharge portion 84 is attached to the shaft portion 82. As a result, the water discharge unit 84 follows the movement of the pillow unit 50. The water discharge portion 84 moves in the inclined direction of the backrest portion 30. That is, the water discharge portion 84 is provided so as to be movable up and down along the backrest portion 30 over a predetermined range MA3. The water discharge unit 84 is connected to the circulation pipe 66. Further, the water spouting portion 84 is arranged close to the spouting port 50b of the pillow portion 50. As a result, the water discharge unit 84 discharges the hot water supplied from the circulation pipe 66 from the water discharge port 50b of the pillow unit 50.

The pillow portion 50 has a hollow dome shape, and when attached to the shaft portion 82, covers each of the support portion 80, the shaft portion 82, and the water discharge portion 84. The pillow portion 50 moves in the vertical direction and the front-rear direction along the backrest portion 30 together with the shaft portion 82 over a predetermined range MA1 while covering the support portion 80, the shaft portion 82, and the water discharge portion 84.

The pillow portion 50 covers the support portion 80, the shaft portion 82, and the water discharge portion 84 in the front-rear direction, the left-right direction, and the upward direction (direction perpendicular to the backrest portion 30), for example. That is, the pillow portion 50 prevents the support portion 80, the shaft portion 82, and the water discharge portion 84 from being visually recognized by a bather or the like. Thereby, the aesthetic appearance of the bathtub 10 can be improved.

FIG. 10 is a perspective view schematically showing a part of the bathtub according to the embodiment.
FIG. 10 schematically shows a state in which the pillow portion 50, the shaft portion 82, and the water discharge portion 84 are viewed from diagonally below.
As shown in FIG. 10, a pair of mounting members 50c and 50d for detachably mounting the pillow portion 50 on the shaft portion 82 are provided inside the hollow pillow portion 50.

The mounting members 50c and 50d are provided side by side in the vertical direction (front-back direction). The mounting member 50c is provided on the upper end side (rear end side) in the pillow portion 50. The mounting member 50d is provided on the lower end side (front end side) in the pillow portion 50. The mounting members 50c and 50d are formed in a clip shape. The mounting members 50c and 50d restrict the movement of the pillow portion 50 with respect to the shaft portion 82 in the left-right direction by sandwiching both side surfaces of the shaft portion 82. Then, the mounting members 50c and 50d sandwich the lower end (front end) and the upper end (rear end) of the shaft portion 82 between the mounting member 50c and the mounting member 50d in the vertical direction of the pillow portion 50 with respect to the shaft portion 82. Regulate movement in the (front-back direction). In other words, the shaft portion 82 is provided on the back surface side of the pillow portion 50, and has an elongated shape extending in the vertical direction within a range between the upper end and the lower end of the pillow portion.

By sandwiching the shaft portion 82 between the mounting members 50c and 50d in this way, the movement of the pillow portion 50 with respect to the shaft portion 82 in the front-rear and left-right directions is restricted, and the pillow portion 50 is attached to the shaft portion 82. The method of attaching the pillow portion 50 to the shaft portion 82 is not limited to the above, and any attachment method that can be detachably attached to the shaft portion 82 may be used.

The water discharge portion 84 has an elongated shape extending in the left-right direction. The left-right length of the water spouting portion 84 corresponds to the left-right length of the spouting port 50b of the pillow portion 50. The water discharge unit 84 discharges a strip-shaped water stream extending in the left-right direction through the water discharge port 50b.

11 (a) and 11 (b) are perspective views schematically showing a part of the bathtub according to the embodiment.
11 (a) and 11 (b) show a state in which the pillow portion 50 is removed from the shaft portion 82. Further, FIG. 11A shows a state in which the shaft portion 82 is in the highest position, and FIG. 11B shows a state in which the shaft portion 82 is in the lowest position.

As shown in FIGS. 11A and 11B, the bathtub 10 further includes a pair of water supply portions 86 and 88 and a pair of supply pipes 90 and 92. The water supply portions 86 and 88 are provided in the backrest portion 30. The water supply portions 86 and 88 are arranged side by side in the left-right direction so as to sandwich the shaft portion 82. The water supply portions 86 and 88 are provided at positions covered by the pillow portion 50 in the entire range of the movement range of the pillow portion 50.

The water supply portions 86 and 88 are provided so as to penetrate the bathtub main body 12, and are connected to the circulation pipe 66 on the back surface side of the bathtub main body 12 (see FIGS. 7 and 9). Therefore, as shown by the virtual line VL1 in FIGS. 11A and 11B, the position of the water supply unit 86 does not change even when the water discharge unit 84 is moved up and down. Similarly, as represented by the virtual line VL2, the position of the water supply unit 88 does not change even when the water discharge unit 84 is moved up and down. The circulation pipe 66 is bifurcated on the way and is connected to the water supply units 86 and 88. The circulation pipe 66 supplies the hot water supplied from the pump 62 to each of the water supply units 86 and 88.

Each of the supply pipes 90 and 92 connects the water discharge unit 84 and the water supply units 86 and 88, and supplies the hot water supplied from the water supply units 86 and 88 to the water discharge unit 84. Each of the supply pipes 90 and 92 has flexibility that changes in shape according to the movement of the water discharge portion 84. As a result, even when the water discharge unit 84 can be moved up and down, hot water can be appropriately supplied to the water discharge unit 84. For each of the supply pipes 90 and 92, for example, a rubber tube or a metal flexible hose is used.

The water discharge portion 84 has a horizontally long shape extending in the left-right direction, and has connection portions 84a and 84b with the supply pipes 90 and 92 at both ends in the left-right direction. The connection portion 84a extends to the right from one end of the water discharge portion 84. The connection portion 84b extends to the left from the other end of the water discharge portion 84. In this way, the connecting portions 84a and 84b extend in the left-right direction from both ends in the left-right direction of the water discharge portion 84.

The supply pipe 90 connects the water supply unit 86 and the connection unit 84a. The supply pipe 92 connects the water supply unit 88 and the connection unit 84b. As a result, the hot water supplied from the circulation pipe 66 is supplied to the water discharge unit 84 via the water supply units 86 and 88 and the supply pipes 90 and 92.

The connecting portions 84a and 84b do not necessarily have to be provided at both ends of the water discharge portion 84, and may be provided at at least one end in the left-right direction of the water discharge portion 84. When the water discharge unit 84 has only one connection unit, the water supply unit and the supply pipe may also be one.

The pillow portion 50 is provided on the front side of the backrest portion 30, so that the load from the front does not act on the supply pipes 90 and 92 regardless of the height of the water discharge portion 84 within the predetermined range MA3. Covers the supply pipes 90 and 92. That is, in this example, the pillow portion 50 also functions as a cover that covers the supply pipes 90 and 92. Therefore, in this example, the pillow portion 50, which is a cover, moves up and down following the movement of the water discharge portion 84.

The cover covering the supply pipes 90 and 92 may be provided separately from the pillow portion 50. The cover does not necessarily have to function as a pillow to support the bather's head. Further, the cover does not necessarily have to follow the movement of the water discharge unit 84. The cover can cover the supply pipes 90, 92 so that a load from the front does not act on the supply pipes 90, 92 regardless of the height of the water discharge portion 84 within the predetermined range MA3. It may be configured.

FIG. 12 is a perspective view schematically showing a water discharge portion of the bathtub according to the embodiment.
FIG. 13 is a cross-sectional view schematically showing a water discharge portion of the bathtub according to the embodiment.
As shown in FIGS. 12 and 13, the water discharge portion 84 includes a housing portion 100, a rectifying plate 102, a water passage path forming member 104, a packing 106, and a lid portion 108.

The housing portion 100 has a substantially rectangular box shape with an opening at the top. The connecting portions 84a and 84b are provided at both ends of the housing portion 100. The hot water supplied from the connecting portions 84a and 84b is stored in the housing portion 100.

The lid portion 108 is attached above the housing portion 100 and closes the opening above the housing portion 100. Further, the lid portion 108 forms a gap above and forward of the housing portion 100. As a result, the housing portion 100 and the lid portion 108 form a slit-shaped spout 84c extending in the left-right direction in front of the spout portion 84. The hot water supplied from the connecting portions 84a and 84b is discharged forward from the spout 84c.

The spout 84c discharges wide water extending in the left-right direction. Here, the "wide spout" is, for example, a spouting form in which the length of the water flow discharged from the spout 84c in the left-right direction is longer than the length of the water spouted from the spout 84c in the vertical direction. In other words, the length of the spout 84c in the left-right direction is longer than the length of the spout 84c in the vertical direction. The length of the spout 84c in the left-right direction is, for example, twice or more the length of the spout 84c in the vertical direction. The length of the spout 84c in the left-right direction is, for example, about 20 cm to 30 cm. The lateral length of the spout 84c is, for example, longer than the average width of the human neck. As a result, hot water can be appropriately applied to the neck and shoulders of the bather.

The packing 106 is provided between the housing portion 100 and the lid portion 108. The packing 106 is made of an elastic material such as rubber, and prevents water from leaking from between the housing portion 100 and the lid portion 108 in a direction other than the spout 84c.

By supplying hot water from both the left and right sides to the housing portion 100 which is long in the left-right direction, it is possible to prevent the water discharged from the spout 84c from being biased in the left-right direction. For example, it is possible to prevent the water overflowing upward from the housing portion 100 from being biased in the left-right direction. Therefore, a clean strip-shaped water stream can be discharged from the spout 84c.

The straightening vane 102 has a plurality of openings 102a arranged in the left-right direction. The straightening vane 102 is provided in the upper part of the housing 100. The rectifying plate 102 rectifies the flow of water so that the hot water collected in the housing 100 is passed through each opening 102a so that the water evenly overflows from the housing 100 in the left-right direction. As a result, it is possible to further prevent the water discharged from the spout 84c from being biased in the left-right direction.

The water passage path forming member 104 is provided between the straightening vane 102 and the lid 108 in the housing 100. The water passage path forming member 104 blocks the upward flow of water that has passed through each opening 102a of the straightening vane 102. In the water flow path forming member 104, the water that has passed through each opening 102a of the straightening vane 102 flows backward once, then turns back at the end of the water flow path forming member 104 and heads forward, so that the water flows to the water discharge port 84c. Form a water pathway.

By forming the water passage as described above, the water that has passed through each opening 102a of the straightening vane 102 is discharged from the spout 84c as compared with the configuration in which the water directly flows upward to the spout 84c. It is possible to further suppress the occurrence of bias in the water in the left-right direction. The water flow discharged from the spout 84c can be made into a cleaner band shape.

FIG. 14 is a front view schematically showing a water discharge portion of the bathtub according to the embodiment.
As shown in FIG. 14, the vertical width W2 of both ends of the spout 84c is wider than the vertical width W1 of the central portion of the spout 84c. As a result, the water discharge unit 84 makes the flow rate of the hot water discharged from both ends of the water discharge port 84c larger than the flow rate of the hot water discharged from the central portion of the water discharge port 84c. As a result, it is possible to prevent the band-shaped water flow discharged from the spout 84c from gathering in the center as it flows downward. Therefore, the water flow discharged from the spout 84c can be made into a cleaner band shape.

FIG. 15 is a perspective view schematically showing an example of the usage state of the bathtub according to the embodiment.
As shown in FIG. 15, the strip-shaped hot water of the water spouting portion 84 spouted through the spouting port 50b of the pillow portion 50 hits the neck of the bather. In addition, a part of the band-shaped hot water discharged from the water spouting portion 84 flows to the bather's chest through the bather's neck and also to the bather's shoulder through the bather's body and backrest portion 30. ..

As a result, for example, even when a tall bather takes a bath with the pillow 50 in the highest position and the shoulders and chest come out above the water surface, the upper body of the bather is appropriately warmed. be able to.

16 (a) to 16 (l) are explanatory views schematically showing an example of the procedure for bathing in the bathtub according to the embodiment.
16 (a) to 16 (l) are substantially the same as the state shown in FIG. Therefore, in FIGS. 16A to 16L, detailed reference numerals are omitted for convenience.

As shown in FIG. 16A, the back is brought into contact with the backrest portion 30, the buttocks are supported by the support portion 44, and the legs are placed on the second bottom surface 42 to take a bath. In this case, first, as shown in FIG. 16B, both hands are applied to the right side treatment portion 33 and the left side treatment portion 34.

Next, as shown in FIGS. 16 (c) to 16 (e), the upper body is raised while pressing the right side treatment portion 33 and the left side treatment portion 34 with both hands. At this time, in the bathtub 10, by storing both elbows in the right groove portion 35 and the left groove portion 36, the right treatment portion 33 and the left treatment treatment portion 33 and the left treatment treatment are provided with the elbows bent toward the back side while suppressing the opening of both axillae. The portion 34 can be pressed by hand, and the force of this pressing allows the bather to easily raise the upper body.

Next, as shown in FIG. 16 (f), the buttocks are slid backward from the support portion 44 toward the back support portion 30 along the horizontal first bottom surface 41. Next, as shown in FIG. 16 (g), one leg or both legs are placed on the support portion 44. Next, as shown in FIG. 16H, the buttocks are slid further backward by applying force to the legs placed on the support portion 44 and both hands applied to the right side treatment part 33 and the left side treatment part 34. Then, the buttocks are placed on the lower part (first region R1) of the backrest portion 30.

Next, as shown in FIGS. 16 (i) and 16 (j), both legs are placed on the horizontal first bottom surface 41 one by one. That is, the posture is crouched on the first bottom surface 41. Then, as shown in FIGS. 16 (k) and 16 (l), by applying force to both legs, the person stands up on the first bottom surface 41 and takes a bath from the bathtub 10.

Further, when entering and exiting the bathtub 10, the legs can be placed on the second bottom surface 42, which is higher and horizontal than the first bottom surface 41. As a result, it is possible to easily straddle the bathtub body 12, and it is possible to make it easier to enter and leave the bathtub 10.

FIG. 17 is a plan view schematically showing a part of the reference bathtub.
FIG. 17 shows a reference bathtub BT in which the right side groove portion 35, the left side groove portion 36, and the like are not provided in the backrest portion, and the backrest portion has a uniform inclined surface. In such a bathtub BT, when the upper body is raised by pressing a hand against the backrest from the sleeping state, it is necessary to open the axilla wide so that the elbow does not interfere with the backrest as shown in FIG. is there. However, it may be difficult to raise the upper body because it is difficult to apply a large force to the hands when the armpits are wide open.

Due to the structure of the human musculoskeletal system, it is preferable to apply force by pressing both hands against the target because it is easy to apply force with both armpits closed. In addition, due to the structure of the human musculoskeletal system, in order to maximize the force of both arms, it is preferable to apply force by pressing both hands against the target with the elbows bent.

In the bathtub 10 according to the present embodiment, by providing the right side groove portion 35 and the left side groove portion 36, the right side treatment part and the left side treatment part are provided in a state where the elbows are bent toward the back side while suppressing the opening of both armpits as much as possible. Can be pressed by hand (see FIGS. 3 and 16 (c)). Then, the bather can easily raise the upper body by the force due to this pressing. Further, the upper body is raised by pressing the right side treatment portion 33 and the left side treatment portion 34 where the bather's hands will be arranged in the sleeping state as they are. Therefore, as compared with the case where the rim of the bathtub 10 is gripped and the upper body is raised, the force points of the pressing force for getting up are provided at the positions closer to the bather's body, that is, the right side treatment part 33 and the left side treatment part 34. Therefore, the bather can raise his upper body with less pressing force.

Unlike the method of raising the upper body that grips the rim, etc., when the method of raising the upper body by manually pressing the right side treatment portion 33 and the left side treatment portion 34 in the bathtub body 12 where hot water collects is used, the upper body is raised. When pressing the right side treatment part 33 and the left side treatment part 34, the hand may slip, or it may be necessary to apply unnecessary force to balance the hand so that the hand does not slip. Occurs.

On the other hand, in the bathtub 10, the right side treatment portion 33 and the left side treatment portion 34 are inclined downward so as to be substantially perpendicular to the force required to raise the upper body diagonally upward and forward. Therefore, when the right side treatment part 33 and the left side treatment part 34 are pressed to raise the upper body, it becomes difficult to apply a force along the surfaces of the right side treatment part 33 and the left side treatment part 34, and the hand slips. The bather can raise his upper body more easily without having to apply unnecessary force to balance his hands so that he does not slip.

Further, in the bathtub 10, the lower portion of the right groove portion 35 is inclined downward toward the front, and the lower portion of the left groove portion 36 is inclined downward toward the front. As a result, when the right side treatment portion 33 and the left side treatment portion 34 are pressed to raise the upper body, the right groove portion 35 and the left groove portion 36 can be pressed according to the rising angle of the upper body. The upper body can be raised more easily.

Further, in the bathtub 10, the inclination angle of the lower part of the right side groove portion 35 and the lower part of the left side groove portion 36 with respect to the horizontal direction is larger than the inclination angle of the right side treatment portion 33 and the left side treatment portion 34 with respect to the horizontal direction. As a result, the inclination angles of the right groove portion 35 and the left groove portion 36 are set to match the rising angle of the upper body so that the surface is substantially perpendicular to the direction in which the force is applied, of the right treatment portion 33 and the left treatment portion 34. By making it larger than the inclination angle, it is possible to make it easier for the bather to raise the upper body.

Further, in the bathtub 10, the right shoulder rest portion 31 and the left shoulder rest portion 32 project flush with or forward of the backrest portion 30. As a result, even when the right side groove portion 35 and the left side groove portion 36 for inserting the elbow are provided, it is possible to prevent the shoulder of the bather from sinking to the back side of the backrest portion 30 in the sleeping state. it can. As a result, it is possible to comfortably bathe in a more weakened state.

In the above embodiment, the right shoulder rest 31 and the left shoulder rest 32 are provided on the left and right sides of the backrest 30. The shoulder rest may be provided only on the left side or the right side of the backrest portion 30. In the above embodiment, the right side treatment portion 33 and the left side treatment portion 34 are provided on both the left and right sides of the backrest portion 30. The treatment portion may be provided only on the left side or the right side of the backrest portion 30. In the above embodiment, the right side groove portion 35 and the left side groove portion 36 are provided on both the left and right sides of the backrest portion 30. The groove may be provided only on the left side or the right side of the backrest portion 30.

As described with respect to FIG. 16, when the bather stands up from the sleeping state, the buttocks in contact with the support portion 44 are slid and moved in the direction of the backrest portion 30 on the horizontal first bottom surface 41 (FIG. 16). 16 (f)). After that, the legs are pulled and the soles of the legs are placed on the support portion 44 (see FIG. 16 (g)). Then, by applying a force to extend the legs from that state, the buttocks are placed on the backrest 30 and raised along the inclination of the backrest 30 (see FIG. 16 (h)).

In the bathtub 10, the inclination angle of the support portion 44 is made larger than the inclination angle of the backrest portion 30 at the same height. As a result, when a force for extending the knee is applied from the state where the back of the leg is placed on the support portion 44, the back of the leg rises along the inclination of the backrest portion 30 before the buttocks rise along the inclination of the support portion 44. It is possible to suppress the rise. As a result, the buttocks can be finally moved to a higher position than the lowermost end (for example, the heel) of the back of the leg (see FIG. 16 (i)), and the posture can be easily raised in the bathtub body 12. Therefore, it is possible to easily stand up from the sleeping state while enabling the sleeping bath with the legs arranged at a position higher than the buttocks.

Further, in the bathtub 10, the lower end 30a of the backrest portion 30 is connected to the first bottom surface 41. The inclination angle of the backrest portion 30 is smaller than the inclination angle of the support portion 44 at the same height from the position at the same height as the upper end 44a of the support portion 44 to the first bottom surface 41. As a result, the buttocks that are in contact with the support portion 44 are slid and moved in the direction of the backrest portion 30 on the horizontal first bottom surface 41, and the legs are pulled and the back of the legs is placed on the support portion 44. Can be raised from the first bottom surface 41 along the inclination of the backrest portion 30. Therefore, the rising operation can be performed more easily.

By making the inclination angle of the support portion 44 larger than the inclination angle of the backrest portion 30 at the same height, the buttocks can be raised along the inclination of the backrest portion 30, while the inside of the bathtub body 12 where hot water collects. Since the backrest portion 30 provided in the buttock portion 30 is slippery, the buttocks suddenly rise along the inclination of the backrest portion 30 when a large force is applied to extend the knee from the state where the back of the leg is placed on the support portion 44. There is a risk that the knees will be stretched out. If the sole of the leg slips when the sole of the leg is moved to another easy-to-stand part in the bathtub with the knee fully extended, the leg is moved to another easy-to-stand part in the bathtub body 12 again to prevent falling. It becomes difficult to put it out, and there is a possibility of falling.

In the bathtub 10, the backrest portion 30 has a bending line FL provided at the boundary portion between the first region R1 and the second region R2, and the inclination angle of the second region R2 is larger than the inclination angle of the first region R1. Is also big. As a result, when the buttock portion rises along the inclination of the backrest portion 30, the buttock portion comes into contact with the bending line FL. As a result, the sudden rise of the buttocks can be easily stopped by the bending line FL. That is, it becomes easy to stop the rise of the buttocks at the position where the buttocks come into contact with the bending line FL and the knees are in a mid-waist state where the knees are not fully extended. In the mid-waist state, the knees are not fully extended, so even if the soles of the legs slip, it is possible to easily move the soles of the legs to a part of the bathtub body 12 where it is easy to stand in order to prevent falls. It is possible to perform a stand-up operation more safely.

Further, in the bathtub 10, the bending line FL is provided at a position higher than the upper end 44a of the support portion 44. As a result, the position where the buttocks stop rising is higher than the upper end 44a of the support portion 44, so that the buttocks can be moved to a higher position than the entire back of the leg, and the rising operation in the bathtub body 12 is performed more. You can be in an easy position. Therefore, the rising operation can be performed more easily and safely.

Further, in the bathtub 10, the front side of the bottom surface portion 14 from the support portion 44 is horizontal throughout. As a result, the bather can stand on the horizontal bottom surface portion 14 (second bottom surface 42) on the front side of the support portion 44 when straddling the bathtub body 12 to enter the bathtub body 12. As a result, it is possible to easily enter and exit the bathtub body 12, and it is possible to prevent the bather from falling when entering and exiting the bathtub body 12.

Further, in the bathtub 10, a steeply inclined portion 38 is provided in the center of the lower part of the backrest portion 30. If the length of the first bottom surface 41 in the front-rear direction is too short, the amount of movement of the buttocks to slide in the direction of the backrest portion 30 becomes short, and it becomes difficult to place the soles of the legs on the support portion 44. On the other hand, if the support portion 44 is provided farther forward in order to increase the length of the first bottom surface 41 in the front-rear direction, it becomes difficult for the buttocks to come into contact with the support portion 44 in the sleeping state. It becomes difficult to sleep in a state where the buttocks are in contact with the support portion 44. On the other hand, in the bathtub 10, a steeply inclined portion 38 having a larger inclination angle in the horizontal direction than the backrest portion 30 is provided between the backrest portion 30 and the first bottom surface 41. For this reason, the lower part of the backrest portion 30, which is a dead space that does not contribute much to the state of sleeping, is shortened by the steeply inclined portion 38, so that the distance between the first bottom surface 41 is reduced while suppressing impairing the feeling of sleeping. You can make it longer. Therefore, it is possible to facilitate the standing up operation while suppressing the impaired feeling of sleeping in the sleeping bath with the buttocks in contact with the supporting portion 44.

Further, in the bathtub 10, the first bottom surface 41 is horizontal also in the left-right direction, and the length of both side portions of the first bottom surface 41 in the front-rear direction is longer than the length of the central portion of the first bottom surface 41 in the front-rear direction. .. As a result, the legs can be placed on the side portion of the first bottom surface 41 when entering and exiting the bathtub body 12, and it is possible to make it easier to enter and exit the bathtub body 12. In addition, since the length of the central portion of the first bottom surface 41 in the front-rear direction is shorter than the length of both sides in the front-rear direction, it is possible to prevent the distance between the backrest portion 30 and the support portion 44 from becoming long. .. Therefore, it is possible to facilitate the standing up operation while suppressing the impaired feeling of sleeping in the sleeping bath with the buttocks in contact with the supporting portion 44.

Further, in the bathtub 10, the lower end of the overflow port 52, which is a regulation portion that regulates the overflow water level in the space SP of the bathtub body 12, is a head mounting surface 50a in a state where the pillow portion 50 is arranged at the lowest position. It is provided below the position H2, which is 120 mm higher than the position H1.

As a result of diligent examination of the relationship between sleeping posture and human head structure, the applicant mouthed from the occipital region (occipital point MBP) of an adult Asian woman who is relatively short in the world. The 5% tile value of the length up to is about 195 mm, and the length in the height direction from the head resting surface 50a to the mouth is about 120 mm in consideration of the inclination of the sleeping bath and the state where the jaw is pulled. I got a new finding that it will never be smaller than. The length from the occipital point MBP to the mouth is, more specifically, the length from the occipital point MBP to the mouth in the direction perpendicular to the front face value (the plane that divides the human body into the ventral side and the dorsal side). In other words, it is the length in the anteroposterior direction (horizontal direction) from the occipital point MBP of a human being upright and facing the front to the mouth. Therefore, by setting the overflow port 52 as described above, even when a bather having a relatively small physique sets the height of the pillow portion 50 to the lowest position and adds hot water into the bathtub body 12, the bathtub It is possible to prevent the water level of the hot water in the main body 12 from exceeding the mouth of the bather and causing discomfort to the bather.

In order to maintain the sleeping state, it is preferable to support the buttocks of the bather by the support portion 44, but the body of the bather is buoyant due to the hot water accumulated in the bathtub body 12 under the water surface. Therefore, it is not easy to firmly support the buttocks with the support portion 44. In addition, if the body floats due to buoyancy, the bather unknowingly applies force to the muscles to balance the body, so it may not be possible to weaken and obtain a sufficient relaxation effect. ..

On the other hand, in the bathtub 10, since the backrest portion 30 is provided with the first region R1 and the second region R2, the first region R1 gives the bather a feeling of sleeping and is more than the first region R1. The back of the bather can be bent by the second region R2 having a large inclination angle. As a result, the bather can use the backrest portion 30 and the support portion 44 of the bathtub body 12 by utilizing the "spring force F of the back that tries to straighten the back" that works unconsciously on the bather when the back is bent. You can get the force to press your body against. Further, since the pillow portion 50 that can be moved up and down is provided in the second region R2, even when the pillow portion 50 is in the lowest position, the second region R2 can bend the back of the bather in the sleeping state. The bather can obtain a force to press the body against the backrest portion 30 and the support portion 44 of the bathtub body 12. From the above, the backrest portion 30 of the bathtub body 12 can be used by the upper and lower parts of the pillow portion 50 so that the bather can take a bath at the position of the pillow portion 50 suitable for his / her height, without burdening the body. And the force to press the body against the support portion 44 can be obtained, and the bath can be bathed in a weakened state.

Further, in the bathtub 10, since the bending line FL is provided below the lower end of the pillow portion 50 at the lowest position with a predetermined interval DT, even when the pillow portion 50 is at the lowest position, the second is more reliable. The area R2 allows the back of the bather to be bent in the sleeping state, and the bather can obtain a force to press the body against the backrest portion 30 and the support portion 44 of the bathtub body 12.

The predetermined interval DT is 100 mm or more. As a result, the bather can sleep at the position of the pillow portion 50 suitable for his / her height, and more reliably puts his / her body on the backrest portion 30 and the support portion 44 of the bathtub body 12 without imposing a burden on the body. You can get the pressing force and you can take a bath in a weakened state.

In addition, as a result of diligently examining the relationship between the sleeping posture and the heat retention effect of the body, the applicant found that the shoulders and chest were above the water surface in the sleeping posture. We have obtained a new finding that warming the neck with hot water has a higher heat-retaining effect during and after bathing than warming the chest with hot water.

In the bathtub 10, a water discharge unit 84 for discharging water is provided on the neck of the bather so that the water discharge unit 84 follows the movement of the pillow portion 50. As a result, even when the shoulders and chest of a tall bather come out above the water surface, it is possible to suppress the chills felt in the upper body. Further, by spouting hot water from the water spouting portion 84 to warm the neck and chest of the bather, for example, as compared with the bathing form in which the bather is immersed up to the neck, the burden (water pressure) on the heart of the bather is suppressed while taking a bath. The upper body of a person can be warmed appropriately.

In the bathtub 10, the pillow portion 50 covers the supply pipes 90 and 92 so that a load from the front does not act on the supply pipes 90 and 92 regardless of the height of the water discharge portion 84 within the predetermined range MA3. As a result, for example, a part of the bather's body (head, back, arms, etc.) applies a load to the supply pipes 90 and 92 from the front, and the flexible supply pipes 90 and 92 are crushed and blocked. It can be suppressed that it ends up. Therefore, water discharge can be continued without delay.

FIG. 18 is a plan view schematically showing a modified example of the bathtub according to the embodiment.
The same reference numerals are given to those having substantially the same functions and configurations as those of the above-described embodiment, and detailed description thereof will be omitted.
As shown in FIG. 18, in the bathtub 10a, the right shoulder rest portion 31 and the left shoulder rest portion 32 are provided on both the left and right sides of the upper portion of the backrest portion 30 on the side of the backrest portion 30. Further, in the bathtub 10 of the above embodiment, the right side groove portion 35 and the left side groove portion 36 are provided on the sides of the backrest portion 30, the right shoulder rest portion 31, and the left shoulder rest portion 32, respectively. On the other hand, in the bathtub 10a, the right groove portion 35 is provided between the right shoulder rest portion 31 and the right side treatment portion 33 on the side of the backrest portion 30, and the left groove portion 36 is provided on the side of the backrest portion 30. Is provided between the left shoulder rest portion 32 and the left side treatment portion 34.

As described above, the right shoulder rest portion 31 and the left shoulder rest portion 32 do not necessarily have to be formed integrally with the backrest portion 30. For example, when the width of the bathtub body 12 in the left-right direction is relatively narrow and the width of the backrest portion 30 cannot be widened, the right shoulder rest portion 31 and the left shoulder rest portion 32 are shown as in the bathtub 10a shown in FIG. May be provided on the side of the backrest portion 30.

Even when the right shoulder rest 31 and the left shoulder rest 32 are provided on the side of the backrest 30, the right shoulder rest 31 and the left shoulder rest 32 project flush with or forward of the backrest 30. Is preferable. As a result, as described above, it is possible to prevent the shoulder of the bather from sinking to the back side of the backrest portion 30 in the sleeping state, and it is possible to comfortably bathe in a more weakened state. ..

FIG. 19 is a cross-sectional view schematically showing a modified example of the bathtub according to the embodiment.
As shown in FIG. 19, in the bathtub 10b, the backrest portion 30 has a step portion 39. The step portion 39 is provided at the lower part of the backrest portion 30. Therefore, in the bathtub 10b, the lower end 30a of the portion of the backrest portion 30 that continuously descends and inclines toward the front is located above the first bottom surface 41.

As described above, the lower end 30a of the backrest portion 30 does not necessarily have to be connected to the first bottom surface 41. The backrest portion 30 may have a portion having a larger inclination angle than the support portion 44 at the same height.

However, it is preferable that the lower end 30a of the backrest portion 30 that continuously descends and inclines toward the front is located below the upper end 44a of the support portion 44. As a result, as described above, the buttocks that are in contact with the support portion 44 are slidably moved in the direction of the backrest portion 30 on the horizontal first bottom surface 41, and the buttocks can be easily raised along the inclination of the backrest portion 30. can do. It is possible to make it easier for the bather to stand up.

FIG. 20 is a cross-sectional view schematically showing a modified example of the bathtub according to the embodiment.
FIG. 20 schematically shows a state in which a portion of the first bottom surface 41 of the bathtub body 12 is cut in a cross section parallel to the horizontal direction and the vertical direction and viewed from the front side.
As shown in FIG. 20, in the bathtub 10c, the first bottom surface 41 has a concave curved surface shape in which the central portion in the left-right direction is recessed below both end portions in the left-right direction. As described above, the first bottom surface 41 may be horizontal at least in the front-rear direction, and may not necessarily be horizontal in the left-right direction.

For example, as shown in FIG. 20, the first bottom surface 41 is formed into a concave curved surface. That is, the first bottom surface 41 is formed into a curved surface that easily fits the buttocks of the bather. As a result, for example, when the buttocks that are in contact with the support portion 44 are slid and moved in the direction of the backrest portion 30 on the first bottom surface 41 that is horizontal in the front-rear direction, the bath is bathed by the curved surface in the left-right direction of the first bottom surface 41. The buttocks of the person can be appropriately guided to the backrest portion 30. For example, it is possible to prevent the buttocks of the bather from slipping down into the right groove 35, the left groove 36, and the like. Therefore, it is possible to make it easier for the bather to stand up.

On the other hand, when the first bottom surface 41 is made horizontal as shown in FIG. 3, for example, it is possible to easily stand on the first bottom surface 41 when taking a bath. For example, it is possible to more reliably suppress the fall of the bather and further improve the safety. Further, when the water in the bathtub main body 12 is drained, it is possible to prevent water from remaining on the first bottom surface 41 and improve the drainage property.

The embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. With respect to the above-described embodiment, those skilled in the art with appropriate design changes are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, size, material, arrangement, and the like of each element included in the bathtub 10 and the like are not limited to those illustrated, and can be changed as appropriate.
In addition, the elements included in each of the above-described embodiments can be combined as much as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

10, 10a-10c Bathtub, 12 Bathtub body, 14 Bottom part, 16 Side part, 21 1st inner side surface, 22 2nd inner side surface, 30 Backrest part, 31 Right shoulder support part, 32 Left shoulder support part, 33 Right side treatment Part, 34 Left side treatment part, 35 Right side groove part, 36 Left side groove part, 38 Steep slope part, 39 steps part, 41 First bottom surface (horizontal part), 42 Second bottom surface (mounting part), 44 Support part, 50 Pillow part , 51 Drainage port, 52 Overflow port (regulated part), 53, 54 Injection port, 55 Suction port, 60 Overflow line, 62 Pump, 64, 66 Circulation pipe, 68 Drainage pipe, 80 Support part, 82 Shaft part, 84 Water discharge part, 86, 88 Water supply part, 90, 92 Supply pipe, 100 housing part, 102 rectifying plate, 104 water flow path forming member, 106 packing, 108 lid part, FL bending line, R1 first area, R2 second region

Claims (6)

A backrest with an inclination angle of 45 ° or less with respect to the horizontal direction,
The right shoulder rest and the left shoulder rest provided on both the left and right sides of the upper part of the backrest,
Right side treatment part and left side treatment part provided on both left and right sides of the lower part of the backrest part,
It is provided on both the left and right sides of the central portion in the vertical direction of the backrest portion, and is recessed from the backrest portion to the rear side of the bather whose back is in contact with the backrest portion, and the bather manually hands the right side treatment portion and the backrest portion. Right and left grooves that allow the bather's elbows to be located on the back side of the backrest when pressing the left treatment to raise the upper body.
Equipped with a,
The bathtub characterized in that the right side treatment portion and the left side treatment portion are inclined downward toward the front . The lower part of the right groove portion is inclined downward toward the front.
The lower part of the left groove portion is inclined downward toward the front.
The bathtub according to claim 1 , wherein the inclination angle of the lower part of the right side groove portion and the lower part of the left side groove portion with respect to the horizontal direction is larger than the inclination angle of the right side treatment portion and the left side treatment portion with respect to the horizontal direction. The bathtub according to claim 1 or 2 , wherein the right shoulder rest portion and the left shoulder rest portion project flush with or forward from the backrest portion. A backrest with an inclination angle of 45 ° or less with respect to the horizontal direction,
A shoulder rest provided on either the left or right side of the upper part of the backrest,
A treatment portion provided on either the left side or the right side of the lower part of the backrest portion, and
It is provided on either the left side or the right side of the central portion in the vertical direction of the backrest portion, and is recessed from the backrest portion to the rear side of the bather whose back is in contact with the backrest portion, and the bather manually handles the treatment portion. A groove that allows the bather's elbows to be located on the back side of the backrest when the upper body is raised by pressing.
Equipped with a,
The treatment portion is a bathtub characterized in that it is inclined downward toward the front . The lower part of the groove is inclined downward toward the front.
The bathtub according to claim 4 , wherein the inclination angle of the lower portion of the groove portion with respect to the horizontal direction is larger than the inclination angle of the treatment portion with respect to the horizontal direction. The bathtub according to claim 4 or 5 , wherein the shoulder rest portion is flush with the backrest portion or projects forward.

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