JP2009247749A - Bathtub system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathtub system capable of imparting a sufficient massage effect to a bather. <P>SOLUTION: The bathtub system 11 is provided with a bathtub 2, an reciprocating part 3 attached to the back side face 2a of the bathtub 2, and a driving means 4 for driving the reciprocating part 3. The surface of the reciprocating part 3 can be displaced between a standard state and an advance state wherein it projects to the inside of the bathtub 2 compared to the standard state. Then, the back side face 2a of the bathtub 2 is a double-inclined plane for a lumbar side and a shoulder side, on which the inclined plane for the lumbar side is less steep than that for the shoulder side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bathtub, and more particularly, to a bathtub provided with a device for massaging a bather.

  In recent years, health consciousness has increased, and there has been an increasing demand for easy massage during bathing. Therefore, a bath massage apparatus has been developed that massages bathers in a bathtub. For example, Patent Literature 1 discloses a bath massage apparatus installed in a bathtub, and a surface that contacts a bather's back is a convex rounded surface, and a device that projects a push ball from the convex rounded surface by an air pump. It is disclosed. In patent document 1, when a bather sits in a bathtub and the back is in contact with the convex rounded surface, the bather can be massaged by operating the air pump to project the push ball. Are listed.

  However, the technique described in Patent Document 1 has the following problems. That is, in this bathing apparatus, since the surface with which the bather's back contacts is a convex rounded surface, the bather receives a massage with the back extended. For this reason, the bather cannot take a relaxed posture and cannot relax sufficiently mentally. In addition, buoyancy is acting on the bather, but the bather only touches the back to the convex round surface of the bath massage device, so if the push ball protrudes, the body moves forward, enough The massage effect cannot be obtained.

  Patent Document 2 discloses a bathtub having a massage function, in which a surface into which an inner massage machine on the side surface of the bathtub is incorporated is concave. In this bathtub, an opening that extends in the vertical direction is formed on the side of the backrest side of the bathtub, and this opening is watertightly covered with a rubber sheet, and the kneading balls open the inside of the rubber sheet. Move up and down along. For this reason, if a bather drives a kneading ball in the state which made the back contact the side surface of the backrest side, it can receive a massage via a rubber sheet.

  However, even in the technique described in Patent Document 2, the buoyancy acts on the bather, and the bather simply touches the back to the surface on which the massage machine is incorporated. If it protrudes, the body moves forward and the force escapes. For this reason, even in the technique described in Patent Document 2, the bather cannot obtain a sufficient massage effect.

  Patent Document 3 discloses a technique for ejecting bath water to a bather while swinging a nozzle.

JP 2000-342653 A (FIG. 1) Registered Utility Model No. 2509403 Publication (FIG. 1) Japanese Patent Laying-Open No. 2007-260266 (FIG. 1)

  The objective of this invention is providing the bathtub which can give a sufficient massage effect to a bather.

  According to one aspect of the present invention, a bathtub provided with a back side surface, a foot side surface, and a bottom surface that supports a buttock, an advancing portion capable of advancing toward the inside of the bathtub, and a driving means for driving the advancing portion are provided. The back side surface is composed of a slanted side that is supported from the buttocks of the bather to the waist and a slanted side of the shoulder that is supported from the waist to the shoulders of the bather. The slope is formed more gently than the dorsal inclined surface so that the bather puts his feet on the side and can be sufficiently adhered in a state where the bather's waist is pressed against the lumbar inclined surface, and the advancement portion is further Provided is a bathtub device that is provided on an inner wall of a waist-side inclined surface.

  ADVANTAGE OF THE INVENTION According to this invention, the bathtub apparatus which can give a sufficient massage effect to a bather is realizable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a first embodiment of the present invention will be described.
FIG. 1 is a schematic cross-sectional view illustrating a bathtub device according to this embodiment.

  As shown in FIG. 1, in the bathtub apparatus 11 which concerns on this embodiment, the bathtub 2 is provided. The shape of the bathtub 2 is substantially rectangular when viewed from above, and both end portions in the longitudinal direction are the back side and the foot side. An inner wall surface (hereinafter referred to as “back side surface”) 2a on the back side of the bathtub 2 is generally inclined to open upward with respect to the vertical direction, and has a shape having two inclined surfaces. There is no. The shape of the back side surface 2a is composed of, for example, a shoulder-side inclined surface 2b that is supported from the waist to the shoulder of the bather M and a waist-side inclined surface 2c that is supported from the buttocks to the waist. The inclined surface has a gentler slope than the inclined surface 2b. When the bather M takes a bathing posture, the shape of the back side surface 2a is a shape that can be in close contact with the shoulder to the buttocks.

  The shoulder-side inclined surface 2b and the waist-side inclined surface 2c are provided with a plurality of shoulder advancing portions 3b and a waist advancing portion 3a along the vertical direction. The waist advancing portion 3a and the shoulder advancing portion 3b are arranged in two rows on both sides of a center line extending in the vertical direction of the back side surface 2a, for example. The advancing portion 3 has a state in which the surface thereof is substantially flush with the back side surface 2a (hereinafter referred to as “standard state”), and a state where the advancing portion 3 has advanced toward the interior of the bathtub 2 (hereinafter referred to as “advanced state”). The standard state and the advanced state are repeated. In FIG. 1, the shoulder advancement portion 3b is in the standard state, and the waist advancement portion 3a is in the advancement state. The advancing direction of each advancing portion 3a, 3b is, for example, a direction substantially perpendicular to the region where the advancing portions 3a, 3b are provided on the back side surface 2a. Further, the advancing portions 3 a and 3 b are connected to driving means 5 provided outside the bathtub 2. The drive means 5 drives the advance parts 3a and 3b.

Next, operation | movement of the bathtub apparatus which concerns on this embodiment comprised as mentioned above is demonstrated.
First, as shown in FIG. 1, hot water W is accumulated in the bathtub 2, and all the advancing parts 3 are set to a standard state.
Then, the bather M enters the bathtub 2, puts the buttock on the bottom surface 2e, contacts the hip side inclined surface 2c from the buttock to the waist, contacts the shoulder side inclined surface 2b from the hip to the shoulder, and puts the sole of the foot Take a bathing posture by abutting the side surface 2f. Thereby, the shoulder part of the bather M fits the inclination of the shoulder side inclined surface 2b, and the bather's waist part can be sufficiently adhered in a state where his / her leg is stretched to the waist side inclined surface. You can also warm up to your shoulders.
Here, the effect of the gentle inclination will be described. The pelvis is supported while the waist-side inclined surface 2c maintains a relaxed posture by the inclined surface having a gentler slope than the shoulder-side inclined surface 2b, and the pelvis is straight and parallel to the angle of the inclined surface. As a result, due to the relationship between the pelvis and the hip joint, it becomes difficult to move forward and more closely. In addition, when the horizontal force that stretches the side of the foot is transmitted to the pelvis through the thigh, the pelvis tilts, so that it can be relaxed and the horizontal force component can be transmitted to the lumbar inclined surface. Thereby, the waist-side inclined surface and the waist are more closely attached. As a result, it is considered that a higher pressing force can be obtained.

  The bath advancement section 3a disposed along the back muscles (back muscles) from the buttocks of the bather drowning on the back side and the shoulder advancement section 3b disposed along the muscles from the waist to the shoulders (back muscles) When the person is in the bathing state, the driving means 5 changes the state of each of the advancing portions 3a and 3b between the standard state and the advancing state. As a result, the surfaces of the advancing portions 3a and 3b that have entered the advancing state protrude from the back side surface 2a and are pressed from the shoulder of the bather M to the hips, and the surfaces of the advancing portions 3a and 3b that have reached the standard state are It becomes substantially the same plane as the side surface 2a and does not press the back and waist of the bather M. And the drive means 5 can drive each bathing part 3a, 3b independently, and can massage a bather in various modes. At this time, since the bather M takes a bathing posture by bringing the soles into contact with the foot side surface 2f, the force of stretching with the feet can be efficiently transmitted to the waist-side inclined surface. Even if it is pressed toward the foot side, a sufficient pressing force can be obtained.

Furthermore, in this embodiment, since the advancing parts 3a and 3b are each formed in a plurality of stages along the vertical direction, it is possible to massage the entire bather from the shoulder to the buttocks. Moreover, since the advancing portions 3a and 3b are arranged in two rows on both sides of the center line of the back side surface 2a, the left and right back muscles of the bather can be massaged efficiently.
Since the advancing section can be driven independently, a bather who is particularly worried about back pain can drive the waist advancing section 3a as a main body to concentrate the waist massage.

Next, the effect of this embodiment will be described.
In the present embodiment, the flank inclined surface formed on the back side surface of the bathtub is formed with a gentler slope than the shoulder inclined surface, so that the pelvis can be supported in a relaxed bathing posture on the lumbar inclined surface. , Can be transmitted to the pelvis and hips through the thigh. Thereby, even if a buoyancy acts on a bather, and also when a bather's back is pressed by the advancing part 3, it can prevent that a bather's body moves to the foot side. As a result, the force received by the bather from the waist advancement portion 3a does not escape, and a massage with a sufficient pressing feeling is possible.

Next, a second embodiment of the present invention will be described.
FIG. 2 is a schematic cross-sectional view illustrating the bathtub device according to this embodiment.
In FIG. 2, the same components as those in FIG. 1 in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted. The same applies to the other drawings to be described later.

As shown in FIG. 2, in the bathtub apparatus 12 according to the present embodiment, compared to the first embodiment described above, from the bottom surface 2e of the bathtub 2 to the waist-side inclined surface 2c of the back side surface 2a, The difference is that a vertical portion 2d is provided. Other configurations in the present embodiment are the same as those in the first embodiment.

  In the present embodiment, the vertical portion 2d forms a space that absorbs the rise of the buttocks, and the waist can be brought closer to the waist-side inclined surface 2c, so that the adhesion of the waist can be further improved. Thereby, a sufficient pressing force can be obtained in the massage on the waist. Also, when taking a bathing posture, the position of the buttocks is determined by taking the bathing posture after bringing the buttocks closer to the vertical portion 2d, so that the bathing posture with further improved adhesion between the waist and the waist-side inclined surface is achieved. It becomes easy to take. Operations and effects other than those described above in the present embodiment are the same as those in the first embodiment described above.

Next, a third embodiment of the present invention will be described.
FIG. 3 is a schematic cross-sectional view illustrating the bathtub device according to this embodiment.
As shown in FIG. 3, in the bathtub apparatus 13 according to the present embodiment, compared to the first embodiment described above, the bathtub bottom surface 2e is spaced apart from the waist-side inclined surface 2c in the direction of the foot side surface 2f. There is provided a buttocks misalignment prevention portion (convex portion) 2g that bulges toward the inside of the bathtub. In other words, there is a space between the waist-side inclined surface 2c and the convex buttocks shift prevention portion (convex portion) 2g so that the buttocks can enter, and the bather can place the buttocks on the bathtub bottom surface 2e at that position. Put on and take a bathing posture. Other configurations in the present embodiment are the same as those in the first embodiment.

Next, the operation and effect of this embodiment will be described.
The bather M attaches a buttock to the bathtub bottom surface 2e between the waist-side inclined surface 2c and the buttock misalignment prevention portion (convex portion) 2g, makes the sole contact the foot side surface 2f, and places the waist on the waist side. The shoulder portion is pressed against the inclined surface 2b against the shoulder-side inclined surface 2b to take a bathing posture. At this time, when the waist side advancing portion 3a of the waist-side inclined surface 2c protrudes by the buttocks slip prevention portion (convex portion) 2g serving as a buttocks slip prevention means, by receiving a force that causes the buttocks to slip forward Sufficient pressing force can be obtained. Moreover, when taking a bathing posture, the position of the buttocks is determined by the waist-side inclined surface 2c and the buttocks displacement prevention portion (convex portion) 2g, so that the bather's waist can be easily brought into close contact with the waist-side inclined surface 2c. Operations and effects other than those described above in the present embodiment are the same as those in the first embodiment described above.

4 and 5 are schematic cross-sectional views illustrating modifications according to the present embodiment.
As shown in FIG. 4, the heel part displacement prevention portion includes a bathtub bottom surface 2 h that supports the heel portion at a position lower than the bathtub bottom surface 2 e, and the surface 2 i that is connected to the bathtub bottom surface 2 e in an inclined manner prevents the heel portion from being displaced. It may be. Moreover, as shown in FIG. 5, the surface 2j made into the concave curved surface may be continuously formed with the bathtub bottom face 2e toward the direction of the foot | leg side surface 2f from the waist side inclined surface 2c. By attaching a buttock to the concave surface 2j when the bather takes a bathing posture, it fits and supports the curved surface of the buttock, so that it is further prevented that the buttock is displaced when the waist side advancement portion 3a protrudes. be able to. In addition, the collar part support part illustrated here may be provided uniformly with respect to the short-side direction of the bathtub, and even if the central part of the bathtub is provided with a predetermined length, the above-described effects are exhibited. be able to.

Next, a fourth embodiment of the present invention will be described.
FIG. 6 is a schematic cross-sectional view illustrating the bathtub device according to this embodiment.
As shown in FIG. 6, in the bathtub device 14 according to the present embodiment, a part of the bottom surface on the foot side of the bathtub bottom surface 2 e protrudes toward the inside of the bathtub as compared with the first embodiment described above. A foot placement portion 2k is provided. Other configurations in the present embodiment are the same as those in the first embodiment.

  In the present embodiment, when the bather M takes a bathing posture, since the foot placement portion 2k is provided, when the sole is brought into contact with the foot side surface 2f, it naturally becomes a high position. When the foot is stretched, the heel is easily brought into close contact with the foot side surface 2f, and by pushing the heel, a pressing force can be obtained. Further, since the foot position is increased, the angle of the thigh with respect to the waist-side inclined surface is close to a right angle, and the force when stretched with the foot can be efficiently transmitted to the waist-side inclined surface 2c through the waist. A sufficient pressing force can be obtained when the side advancing portion 3a protrudes. Further, when the posture is shifted after bathing for a long time, the lumbar part adheres to the waist-side inclined surface 2c by putting the foot on the front side of the footrest part 2k and sitting again. Can continue to maintain. Operations and effects other than those described above in the present embodiment are the same as those in the first embodiment described above.

Next, a fifth embodiment of the present invention will be described.
FIG. 7 is a schematic cross-sectional view illustrating the bathtub device according to this embodiment.
As shown in FIG. 7, in the bathtub apparatus 15 according to this embodiment, the foot side surface 2f of the bathtub is provided with an uneven portion 2m as compared with the first embodiment described above. Other configurations in the present embodiment are the same as those in the first embodiment.

  In this embodiment, the bather M takes a bathing posture with the sole in contact with the foot side surface 2f, and when the advancing portion 3 is projected, the bather M stretches the foot side surface 2f with the sole to obtain a pressing force. When trying to do so, it is possible to prevent the foot from slipping and the pressing force to escape. Thus, a sufficient pressing force can be obtained with certainty when massaged. Further, the presence of the concavo-convex portion 2m makes the position where the soles come into contact with each other clear, and it is possible to efficiently obtain the pressing force by positioning it at a place where the most pressing force can be obtained. It should be noted that the place where the pressing force can be obtained is preferably near the middle position in the height direction of the foot sole 2f, for example. Operations and effects other than those described above in the present embodiment are the same as those in the first embodiment described above.

8 and 9 are schematic cross-sectional views illustrating modifications according to this embodiment.
As shown in FIG. 8, the toe of the bather can be applied by providing a convex portion 2n serving both as a slip prevention means and a foot positioning means at the upper part of the foot side surface 2f, thereby preventing slipping and positioning. Can do. Further, as shown in FIG. 9, a convex portion 2p serving both as a slip prevention means and a foot positioning means may be provided near the center of the foot side surface 2f in the height direction. As a result, the bath car can prevent slipping and positioning by bringing the arch of the sole into contact with the convex portion 2p. As a result, the same effects as those of the fifth embodiment can be obtained.

Next, a specific example for realizing the above-described embodiment of the present invention will be described.
FIG. 10 is a block diagram illustrating a bathtub device according to this example.
FIG. 11 is a transparent perspective view illustrating the bathtub of the bathtub device according to this example.
FIG. 12 is a cross-sectional view illustrating an advancing portion of the bathtub device according to this example.
As shown in FIG. 4, in the bathtub device 16 according to this specific example, a bathtub 20, an advancing portion 30, and a driving means 40 are provided.

  As shown in FIG. 11, the shape of the bathtub 20 is a substantially rectangular parallelepiped shape. Among the inner wall surfaces, one surface of both end surfaces facing in the longitudinal direction is the back side surface 21, and the other surface is the foot side surface 22. is there. The back side surface 21 is composed of a waist-side inclined surface 24 that supports from the buttocks to the waist when a bather (not shown) takes a bathing posture, and a shoulder-side inclined surface 25 that supports from the waist to the shoulder. While inclining obliquely upward, the connecting portions of the two inclined surfaces are continuously connected by curved surfaces. Here, the angle formed by the horizontal surface of the waist-side inclined surface 24 is preferably about 20 ° to 55 °, more preferably 40 ° to 50 °, and the angle formed by the horizontal surface of the shoulder-side inclined surface 25 is 60 °. ° to 90 ° is preferable, and 65 ° to 80 ° is more preferable. It is connected around the middle of the bathtub height direction. In addition, the foot side surface 22 has an inclined shape opened upward, but may have an R shape, and preferably transmits a force when the foot is stretched while standing in a substantially vertical direction.

  A plurality of advancing portions 30 are provided along a center line C extending in the vertical direction of the back side surface 21. The advancing portions 30 are provided in two rows, one on each side of the center line C, and are arranged symmetrically with respect to the center line C. Further, the advancing portions 30 are arranged, for example, at equal intervals in each row of the waist advancing portion 30a and the shoulder advancing portion 30b, and are separated from the center line C by, for example, about 30 mm.

  Next, the advance section will be explained. As shown in FIG. 12, each advancement portion 30 is provided with a cylindrical holding cylinder 31. The holding cylinder 31 is water-tightly connected to the outer surface of the back side surface 21, and a portion of the back side surface 21 to which the holding cylinder 31 is attached is opened, whereby the inside of the holding cylinder 31 is It communicates with the inside of the bathtub 20.

  An airbag 32 is provided inside the holding cylinder 31. The airbag 32 has a substantially cylindrical bellows shape, and extends along the bellows arrangement direction when air is introduced therein, and contracts along the bellows arrangement direction when the internal air is discharged. That is, the airbag 32 expands and contracts in one direction as air flows in and out. The airbag 32 is arranged so that the arrangement direction of the bellows, that is, the expansion and contraction direction is, for example, perpendicular to the back side surface 21, and the end far from the back side surface 21 is watertight to the inner surface of the holding cylinder 31. It is connected to.

  Further, a receiving plate 33 is movably provided in a portion closer to the bathtub 20 than the airbag 32 inside the holding cylinder 31 and is in contact with the airbag 32. A protruding member 34 is connected to the surface of the receiving plate 33 on the opposite side of the airbag 32. The protruding member 34 is a cylindrical member made of, for example, a hard resin material, and the tip end portion 34a on the side not connected to the receiving plate 33 is rounded. Furthermore, a spring 35 is provided between the back side plate 21 and the receiving plate 33 inside the holding cylinder 31 and urges the receiving plate 33 in a direction away from the back side plate 21.

  On the other hand, as shown in FIG. 10, in the driving means 40, the pump 41, the air tube 42 that communicates the pump 41 and the airbag 32 (see FIG. 6) of each advance portion 30, Each provided switching valve 43 is provided. The switching valve 43 is, for example, a three-way electromagnetic valve, and can switch between pressurization to the advancing unit 30 and air discharge from the advancing unit 30. The pump 41 and the switching valve 43 are connected to a controller 44 that controls them. In FIG. 10, for simplicity of illustration, the control unit 44 is depicted as being connected only to the uppermost switching valve 43. It is possible to control the valve 43 independently.

Next, the operation of this example will be described.
When the pump 41 is not operating, the spring 35 biases the receiving plate 33, and the receiving plate 33 presses the airbag 32, so that the airbag 32 is in a contracted state. Thereby, the protrusion member 34 is accommodated in the holding | maintenance cylinder 31, and the advancing part 30 is in a standard state. Then, the bather enters the bathtub 20 and takes a bathing posture.

  In this state, the control unit 44 operates the pump 41 so that the pump 41 supplies air to the air tube 42. Then, when the control unit 44 operates the switching valve 43 to connect the pump 41 and each advancement unit 30, air flows into the airbag 32 of the advancement unit 30, and the airbag 32 is spring-loaded by the pressure. It expands by overcoming the urging force of 35, and pushes the protruding member 34 toward the inside of the bathtub 20 through the receiving plate 33. As a result, the advancing portion 30 enters the advancing state, and the distal end portion 34a of the protruding member 34 presses the bather's back or waist. Thereafter, when the control unit 44 switches the switching valve 43 to allow the airbag 32 of the advancement unit 30 to communicate with the outside, the airbag 32 is contracted by the urging force of the spring 35, and the protruding member 34 is placed in the holding cylinder 31. Stored. Thereby, the advancement part 30 returns to a standard state. By repeating this operation, the advancing portion 30 repeats the standard state and the advancing state, and the protruding member 34 reciprocates linearly.

  And the control part 44 can massage each bathing part 30 by independently driving each advance part 30 in various modes. For example, the control unit 44 may periodically change the state of each advancement unit 30, make the period the same for all the advancement units 30, and make the phases different among the advancement units 30. In one example, the control unit 44 drives a pair of advancing units 30 arranged in the same stage with the same phase, while gradually delaying the phase from the uppermost advancing unit 30 toward the lower advancing unit 30. To do. Thereby, the bather can obtain a massage feeling such that the back is swung down from the shoulder to the waist.

Next, the effect of this example will be described.
According to this specific example, the bathtub apparatus according to the first embodiment described above can be configured without arranging an electrical component inside the bathtub. This eliminates the need for measures against electric leakage and electric shock, and measures against corrosion of electrical parts caused by hot water, thereby realizing a low-cost and highly reliable bathtub apparatus. The effects other than those described above in this specific example are the same as those in the first embodiment.

    Moreover, when only a waist part wants to massage, you may make it provide only the waist side advancement part 4. FIG.

  As mentioned above, although embodiment of this invention was described, the bathtub apparatus which can give a sufficient massage effect to a bather by this invention is realizable.

It is typical sectional drawing which illustrates the bathtub apparatus which concerns on the 1st Embodiment of this invention. It is typical sectional drawing which illustrates the bathtub apparatus which concerns on the 2nd Embodiment of this invention. It is typical sectional drawing which illustrates the bathtub apparatus which concerns on the 3rd Embodiment of this invention. It is typical sectional drawing which illustrates the modification of the bathtub apparatus which concerns on the 3rd Embodiment of this invention. It is typical sectional drawing which illustrates the modification of the bathtub apparatus which concerns on the 3rd Embodiment of this invention. It is typical sectional drawing which illustrates the bathtub apparatus which concerns on the 4th Embodiment of this invention. It is a typical section perspective view which illustrates a bathtub apparatus concerning a 5th embodiment of the present invention. It is a typical section perspective view which illustrates the modification of the bathtub apparatus concerning a 5th embodiment of the present invention. It is a typical section perspective view which illustrates the modification of the bathtub apparatus concerning a 5th embodiment of the present invention. It is a block diagram which illustrates the bathtub apparatus which concerns on the specific example of this invention. It is a permeation | transmission perspective view which illustrates the bathtub of the bathtub apparatus which concerns on this example. It is sectional drawing which illustrates the advance part of the bathtub apparatus which concerns on this example.

Explanation of symbols

2 bathtub, 2a back side surface, 2b shoulder side inclined surface, 2c waist side inclined surface,
2e 2h bottom surface, 2f foot side surface, 2g 2i buttocks shift prevention portion (convex portion),
2j collar part prevention part (concave curved surface), 2k foot placement part, 2m 2n 2p slip prevention part 3, 3a, 3b advance part, 4 drive means,
14, 15, 16 Bath apparatus,
20 bathtub, 21 dorsal side, 22 foot side, 23 bottom waist side inclined surface 25 shoulder side inclined surface,
30 advancing portion, 31 holding cylinder, 32 airbag, 33 backing plate, 34 protruding member, 34a tip, 35 spring, 40 driving means, 41 pump, 42 air tube,
43 selector valve, 44 control unit, M bather, R back muscle, W hot water

Claims (6)

A bathtub provided with a dorsal side surface, a foot side surface, and a bottom surface that supports the buttocks;
An advancing section capable of advancing toward the inside of the bathtub;
A bathtub device provided with a driving means for driving the advance portion,
The dorsal side is
A waist-side inclined surface supported from the buttocks of the bather to the waist,
It consists of a shoulder-side inclined surface that supports the bather's waist and shoulders,
The waist-side inclined surface is
The bather puts his foot on the foot side of the bathtub, and the slope is formed more gently than the back-side inclined surface so that it can be sufficiently adhered in a stretched state so as to press the bather's waist to the waist-side inclined surface,
Furthermore, the advance portion is provided on the inner wall of the waist-side inclined surface,
The bathtub apparatus characterized by the above-mentioned.   The bathtub device according to claim 1, wherein the advancing portion is provided on inner walls of the waist-side inclined surface and the back-side inclined surface.   The bathtub apparatus according to claim 1, wherein a vertical portion is provided at a lower portion of the waist-side inclined surface with respect to a bottom surface of the bathtub.   The convex part was provided toward the upper side of the said bathtub in the position spaced apart in the direction of the foot | leg side from the said waist side inclined surface lower part of the bottom face of the said bathtub, The any one of Claims 1-3 characterized by the above-mentioned. The bathtub apparatus as described in one.   The bathtub apparatus according to any one of claims 1 to 4, further comprising a foot placement section in which a bottom surface on a foot side surface of the bathtub projects toward the inside of the bathtub.   The bathtub apparatus according to any one of claims 1 to 5, wherein unevenness is provided on the side surface of the foot.

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