JP7690335B2 - Functional unit mounting structure - Google Patents

Description

This disclosure relates to a mounting structure for a functional unit.

Conventionally, bathtub cleaning devices have been known that clean the bathtub by spraying cleaning water, generated by mixing hot water and detergent liquid, onto the inner surface of the bathtub from a cleaning nozzle installed on the bottom of the bathtub (see, for example, Patent Document 1).

The bathtub cleaning device has a functional unit in which the equipment for supplying cleaning water to the cleaning nozzle is built into a rectangular parallelepiped case. The functional unit is attached to the inside of the space under the bathtub by a fixing bracket attached to one of the sides of the case that has a smaller area.

JP 2008-307160 A

Other equipment, such as a pump that sprays hot water from the jet bath, may be installed inside the space under the bathtub. Therefore, the functional unit needs to be installed in the limited space inside the space under the bathtub, avoiding interference with other equipment.

However, the wall surface facing the interior of the space under the bathtub is not necessarily flat and vertical. If the wall surface is inclined or has a convex portion or step, it is difficult to install the functional unit in the appropriate direction and posture using the fixing brackets.

Therefore, the inventors have discovered a problem of how to easily install the functional unit at any position inside the space under the bathtub.

The present disclosure relates to an attachment structure for a functional unit to be placed in the space under the bathtub, the attachment structure for a functional unit comprising a support part that supports the functional unit and a fixing part that fixes the support part, and the functional unit is attached to the inside of the space under the bathtub via the support part and the fixing part.

This is a plan view of the bathroom unit. 1 is a perspective view showing a functional unit attached to the space under the bathtub. FIG. 11 is a perspective view showing a state in which the functional unit, the support portion, and the fixing portion are integrally assembled. FIG. 1 is a perspective view showing a functional unit, a support portion, and a fixing portion in an exploded state; FIG. 4 is a cross-sectional view taken along line AA in FIG. An oblique view of the waterproof pan showing the mounting locations of the functional units. FIG. 4 is a plan view showing the mounting locations of the functional units. 11 is a perspective view showing the rear side of the mounting portion of the functional unit. FIG. 13A and 13B are plan views showing examples of other mounting positions of the functional units. 13 is a front view showing an example of another mounting location of the functional unit. FIG.

Below, one embodiment of the mounting structure for the functional unit will be described in detail with reference to the drawings. As shown in Figure 1, the functional unit 1 is installed in the bathroom unit 100.

The bathroom unit 100 is installed within the building's framework by assembling the washing area floor 110, waterproof pan 120, bathtub 130, wall panels (not shown), and ceiling panel (not shown). The bathtub 130 is installed inside the waterproof pan 120. Below, the mounting structure of the functional unit 1 will be explained using the bathroom unit 100 as an example. The functional unit 1 is not limited to the bathroom unit 100, and can also be applied to bathrooms constructed using conventional construction methods.

In the bathroom unit 100, the waterproof pan 120 and bathtub 130 are generally rectangular in shape, long in one direction, when viewed in a plan view. In the directions shown in the figure, the X1-X2 direction is the longitudinal direction of the waterproof pan 120 and bathtub 130 when viewed in a plan view. The longitudinal direction is the extension direction of the long sides of the waterproof pan 120 and bathtub 130. The Y1-Y2 direction is the transverse direction of the waterproof pan 120 and bathtub 130 when viewed in a plan view. The transverse direction is the extension direction of the short sides of the waterproof pan 120 and bathtub 130.

As shown in Figures 2 and 6, the waterproof pan 120 has a bottom surface 121 on which the bathtub 130 is placed, and three standing wall portions 122A, 122B, 122B rising from three sides around the bottom surface 121. The standing wall portion 122A is arranged on the long side of the waterproof pan 120. The two standing wall portions 122B, 122B are arranged opposite each other on the short side of the waterproof pan 120. The standing wall portion 122A on the long side is arranged on the side farther from the washing area floor 110 of the bathroom unit 100. In the waterproof pan 120, an apron body 123 (see Figure 8) is provided on the long side adjacent to the washing area floor 110.

A space S under the bathtub is formed between the waterproof pan 120 and the bathtub 130. The space S under the bathtub is a space surrounded by the bottom surface 121 of the waterproof pan 120, the vertical wall portions 122A, 122B, 122B, the apron body 123, and the bathtub 130. The upper part of the space S under the bathtub is blocked by the flange portion 131 of the bathtub 130.

The functional unit 1 is constructed by assembling devices for performing various functions on the bathtub 130 inside the rectangular parallelepiped case 11. The functional unit 1 of this embodiment constitutes part of the components of the bathtub cleaning device. That is, the functional unit 1 has the function of mixing hot water supplied from a water supply line (not shown) with detergent liquid supplied from a cleaning tank (not shown) to generate cleaning water, and sending it through a hose (not shown) to a cleaning nozzle (not shown) installed in the bathtub 130. The functional unit 1 has a small side surface 1a as one side surface of the case 11. This side surface 1a is a functional component mounting surface to which various functional components such as a hose (not shown) are attached. The configuration of such a functional unit 1 is similar to that described in Patent Document 1, for example.

The functional unit 1 is installed inside the space under the bathtub S. In this embodiment, the functional unit 1 is disposed on one of the vertical wall portions 122B on the short side of the waterproof pan 120 in the space under the bathtub S. In more detail, the functional unit 1 in this embodiment is attached to the inner wall surface 124 of the vertical wall portion 122B facing the space under the bathtub S.

The functional unit 1 is installed in the bathtub under-space S in an appropriate orientation and posture. The appropriate orientation of the functional unit 1 in this embodiment means that the functional unit 1 is positioned so that the depth direction of the functional unit 1 along the Y1-Y2 direction in the figure is aligned with the extension direction of the standing wall portion 122B in the Y1-Y2 direction, and the side surface 1a faces the washing area floor 110. The appropriate posture of the functional unit 1 in this embodiment means that the functional unit 1 is positioned so that the up-down direction is approximately vertical.

Since the functional unit 1 is attached to the inner wall surface 124, the space under the bathtub S that is accessible from the washing area floor 110 side is increased. This allows for effective use of the space under the bathtub S. When the functional unit 1 is attached to the inner wall surface 124, the width in the X1-X2 direction is sufficiently smaller than the height in the up-down direction and the depth in the Y1-Y2 direction. Therefore, with the orientation and posture of the functional unit 1 of this embodiment shown in Figures 1 and 2, the amount of protrusion of the functional unit 1 from the inner wall surface 124 toward the bathtub 130 inside the space under the bathtub S is reduced.

As shown in Figures 3 and 4, the functional unit 1 is attached to the inner wall surface 124 by the mounting member 2. The mounting member 2 has a support part 20 that supports the functional unit 1, and a fixing part 30 that fixes the support part 20. The mounting member 2 is constructed by assembling two members, the support part 20 and the fixing part 30, together. The support part 20 and the fixing part 30 are each formed by bending and shaping a metal plate.

As shown in FIG. 4, the support portion 20 of the mounting member 2 has a support plate portion 21 and a pair of side plate portions 22, 22. The support portion 20 has a structure that is symmetrical in the width direction along the X1-X2 direction.

The support plate portion 21 is formed in the shape of a rectangular plate that is long in the vertical direction. The plate surface of the support plate portion 21 faces the Y1-Y2 direction. The vertical length of the support plate portion 21 is approximately the same as the vertical length of the side surface 1b of the functional unit 1. The side surface 1b of the functional unit 1 is the side surface opposite the side surface 1a, which is the functional component mounting surface. The width of the support plate portion 21 in the X1-X2 direction is slightly larger than the width of the side surface 1b of the functional unit 1.

A first hook portion 23 is provided on the upper end of the support plate portion 21. The first hook portion 23 is a hook portion that detachably hooks the upper end of the functional unit 1 to the support portion 20. The first hook portion 23 has an extending wall portion 23a and a downward wall portion 23b.

The extending wall portion 23a extends from the upper end of the support plate portion 21 toward the functional unit 1 side, approximately at a right angle to the plate surface of the support plate portion 21. The downward wall portion 23b extends downward from the extending end of the extending wall portion 23a, approximately parallel to the plate surface of the support plate portion 21. This gives the first hook portion 23 a claw shape that opens downward.

A second hook portion 24 is provided at the lower end of the support plate portion 21. The second hook portion 24 is a hook portion that detachably hooks the lower end of the functional unit 1 to the support portion 20. The second hook portion 24 extends from the lower end of the support plate portion 21 toward the functional unit 1 side, approximately at a right angle to the plate surface of the support plate portion 21. The second hook portion 24 has a horizontally elongated rectangular hook hole 24a that penetrates in the vertical direction.

The side plate portions 22, 22 extend from both ends of the support plate portion 21 in the width direction toward the opposite side to the functional unit 1, at approximately right angles to the plate surface of the support plate portion 21. The plate surfaces of the side plate portions 22, 22 face the X1-X2 direction. The vertical length of the side plate portions 22, 22 is the same as the vertical length of the support plate portion 21. The side plate portions 22, 22 are each formed with a plurality of screw holes 22a that penetrate in the plate thickness direction, spaced apart in the vertical direction. The inner peripheral surface of the screw holes 22a is provided with a female thread.

As shown in FIG. 4, two positioning protrusions 25 that protrude in the width direction are formed at each boundary between the support plate 21 and the side plate portions 22, 22, spaced apart in the vertical direction. The positioning protrusions 25 are formed by cutting and raising a part of the side plate portions 22, 22 approximately parallel to the plate surface of the support plate portion 21.

The functional unit 1 has an upper protrusion 12 that is hooked to a first hook portion 23 of the support portion 20 and a lower protrusion 13 that is hooked to a second hook portion 24 of the support portion 20 in order to be supported by the support portion 20.

The upper protrusion 12 protrudes upward from the upper end of the side surface 1b of the functional unit 1. The upper protrusion 12 is a flat plate parallel to the side surface 1b. The vertical height of the upper protrusion 12 is slightly smaller than the vertical length of the first hook portion 23 of the support portion 20. Reinforcing plates 12a, 12a are provided on both ends of the upper protrusion 12 in the width direction. The reinforcing plates 12a, 12a prevent deformation of the upper protrusion 12 in the falling direction.

The lower protrusion 13 protrudes downward from the lower end of the side surface 1b of the functional unit 1. The lower protrusion 13 is a flat plate parallel to the side surface 1b.

As shown in Figures 4 and 5, the functional unit 1 is attached to the support part 20 by a snap-on method. In more detail, first, the upper protrusion 12 of the functional unit 1 is inserted obliquely from below into the first hook part 23 of the support part 20. The upper protrusion 12 is accommodated between the support plate part 21 and the downward wall part 23b of the first hook part 23. Next, the posture of the functional unit 1 is returned to be aligned with the support plate part 21 so that the side surface 1b of the functional unit 1 is parallel to the support plate part 21. Thereafter, the functional unit 1 descends under its own weight, and the lower protrusion 13 of the functional unit 1 is inserted into the hook hole 24a of the second hook part 24 of the support part 20.

As shown in FIG. 5, the functional unit 1 is placed on the second hooking portion 24 of the support portion 20 by its own weight while being hooked on the second hooking portion 24. At this time, the upper protrusion 12 of the functional unit 1 is maintained in a hooked state on the first hooking portion 23, so the functional unit 1 is supported by the support portion 20. The functional unit 1 is removed from the support portion 20 by performing the reverse operation to that described above. Therefore, the functional unit 1 is provided so as to be detachable from the support portion 20. Therefore, even after the functional unit 1 is installed, replacement work of the functional unit 1 can be performed. The support portion 20 has the first hooking portion 23 and the second hooking portion 24 that hook the upper end and lower end of the functional unit 1, respectively, so that the functional unit 1 can be easily attached and removed.

As shown in FIG. 4, the fixing portion 30 of the mounting member 2 has a first fixing plate portion 31, a second fixing plate portion 32, and a connecting plate portion 33. The fixing portion 30 has a structure that is symmetrical in the vertical direction. The width of the fixing portion 30 in the Y direction is slightly smaller than the depth of the functional unit 1 in the Y direction.

The first fixing plate portion 31 is a portion that fixes the support portion 20. The first fixing plate portion 31 is formed in a rectangular shape that is longer in the vertical direction than it is wide in the Y1-Y2 direction. The plate surface of the first fixing plate portion 31 faces the X1-X2 direction. The vertical length of the first fixing plate portion 31 is slightly shorter than the vertical length of the support portion 20, and slightly shorter than the vertical height of the functional unit 1.

The first fixing plate portion 31 is formed with a plurality of screw insertion holes 31a penetrating in the plate thickness direction. The plurality of screw insertion holes 31a are arranged corresponding to the positions of the plurality of screw holes 22a formed in the side plate portion 22 of the support portion 20. Furthermore, the first fixing plate portion 31 is formed with two positioning holes 31b, 31b penetrating in the plate thickness direction. The positioning holes 31b, 31b are arranged corresponding to the positions of two positioning protrusions 25, 25 protruding from the side plate portion 22 of the support portion 20.

The second fixing plate portion 32 is a portion that is fixed to the inner wall surface 124 of the standing wall portion 122B. The second fixing plate portion 32 is formed in a rectangular shape that is longer in the vertical direction than it is wide in the Y1-Y2 direction. The plate surface of the second fixing plate portion 32 is parallel to the plate surface of the first fixing plate portion 31 and faces the X1-X2 direction. The vertical length of the second fixing plate portion 32 is the same as that of the first fixing plate portion 31.

The second fixing plate portion 32 has a plurality of screw insertion holes 32a formed therethrough in the plate thickness direction. The screw insertion holes 32a are arranged two by two at the upper end and lower end of the second fixing plate portion 32, spaced apart in the Y1-Y2 direction.

The connecting plate portion 33 connects the first fixing plate portion 31 and the second fixing plate portion 32. In this embodiment, the connecting plate portion 33 of the fixing portion 30 connects the end of the first fixing plate portion 31 facing the washing area floor 110 to the end of the second fixing plate portion 32 opposite the washing area floor 110, so that they intersect at approximately right angles. The plate surface of the connecting plate portion 33 faces in the Y1-Y2 direction.

The connecting plate 33 forms a step between the position of the first fixing plate 31 and the position of the second fixing plate 32. As a result, the position of the first fixing plate 31 and the position of the second fixing plate 32 are shifted in the X1-X2 direction by the connecting plate 33. That is, the first fixing plate 31 is positioned closer to the bathtub 130 than the second fixing plate 32. In other words, the second fixing plate 32 is positioned farther from the bathtub 130 than the first fixing plate 31. This connecting plate 33 functions as a position adjustment part for maintaining the position of the functional unit 1 fixed to the fixing part 30 via the support part 20 in an appropriate direction and posture with respect to the inner wall surface 124 when the fixing part 30 is attached to the inner wall surface 124 as described below.

As shown in Figures 3 and 4, the fixing part 30 of the mounting member 2 is fixed to the side plate part 22 of the support part 20 by the fixing screw 34. The positioning protrusion 25 of the support part 20 is inserted into the positioning holes 31b, 31b of the first fixing plate part 31 of the fixing part 30, and the support part 20 and the fixing part 30 are positioned. At this time, the screw hole 22a of the side plate part 22 and the screw insertion hole 31a of the first fixing plate part 31 are aligned. The fixing screw 34 is inserted from the screw insertion hole 31a side and screwed into the screw hole 22a. As a result, the fixing part 30 is fixed to one of the side plate parts 22 of the support part 20, and the support part 20 and the fixing part 30 are assembled together.

The mounting member 2, in which the support part 20 and the fixing part 30 are integrated before supporting the functional unit 1, is attached to the inner wall surface 124 of the vertical wall part 122B of the waterproof pan 120, as shown in Figs. 2 and 7. As shown in Figs. 6 and 7, the inner wall surface 124 has a wall surface main body 124a that rises almost vertically and an inclined surface 124b that inclines toward the inside of the bathtub lower space S as it approaches the bottom surface 121. Fig. 6 shows a rectangular mounting area R for mounting the functional unit 1 to the inner wall surface 124. This mounting area R spans the wall surface main body 124a and the inclined surface 124b of the inner wall surface 124. Within the mounting area R, the wall surface main body 124a is located on the side farther from the vertical wall part 122A on the long side (the side closer to the washing area floor 110) than the inclined surface 124b.

The mounting member 2 is attached to the mounting area R on the inner wall surface 124 by the second fixing plate portion 32 of the fixing portion 30. More specifically, the second fixing plate portion 32 is attached to the wall surface main body 124a in the mounting area R. The second fixing plate portion 32 is attached to the inner wall surface 124 by a fixing screw 35 inserted into the screw insertion hole 32a from the inside of the bathtub lower space S. The fixing screw 35 penetrates the vertical wall portion 122B. As shown in Figures 7 and 8, an auxiliary fixing plate 36 made of, for example, a wooden rectangular flat plate is arranged on the back side of the vertical wall portion 122B. The fixing screw 35 that penetrates the vertical wall portion 122B further penetrates the auxiliary fixing plate 36. As a result, the vertical wall portion 122B is sandwiched between the second fixing plate portion 32 of the fixing portion 30 and the auxiliary fixing plate 36, and the mounting member 2 is stably fixed to the inner wall surface 124 of the vertical wall portion 122B.

The width of the connecting plate 33 of the fixing part 30 in the X1-X2 direction is formed to be greater than the maximum step between the wall body 124a and the inclined surface 124b in the mounting region R. Therefore, when the second fixing plate 32 is fixed to the wall body 124a, the first fixing plate 31 is positioned by the connecting plate 33 to be positioned further inside the bathtub lower space S than the inclined surface 124b. Therefore, the support part 20 and the functional unit 1 do not interfere with the inclined surface 124b. The first fixing plate 31 is parallel to the second fixing plate 32 and forms a substantially vertical surface inside the bathtub lower space S, so that the functional unit 1 is installed inside the bathtub lower space S in an appropriate direction and posture.

The support portion 20 of the mounting member 2 has a structure that is symmetrical in the width direction in the X1-X2 direction, and the fixing portion 30 has a structure that is symmetrical in the up-down direction, so that the fixing portion 30 can be fixed to either of the pair of side plate portions 22, 22. Therefore, the functional unit 1 can be similarly attached to, for example, the other vertical wall portion 122B side of the waterproof pan 120, further improving the degree of freedom of attachment inside the bathtub under-space S.

As shown in FIG. 2, the bottom surface 1c of the functional unit 1 attached to the inner wall surface 124 is positioned above the bottom surface 121 of the waterproof pan 120 placed inside the bathtub lower space S. The waterproof pan 120 of this embodiment has a protruding surface 121a below the functional unit 1, where a portion of the bottom surface 121 protrudes upward. The bottom surface 1c of the functional unit 1 is positioned above and spaced apart from the protruding surface 121a. This prevents interference between the protruding surface 121a and parts such as a drain valve (not shown) that protrude from the bottom surface 1c of the functional unit 1.

Since the mounting member 2 is composed of a support part 20 that supports the functional unit 1 and a fixing part 30 that fixes the support part 20, it is possible to change only the fixing part 30 to any shape. Therefore, depending on the shape of the wall surface to which the functional unit 1 is attached, specifically, the presence or absence of an inclined surface, the angle of the inclined surface, the size of the convex part or step, etc., it is possible to select and use a fixing part having an optimal shape that allows the functional unit 1 to be in the appropriate direction and posture.

As shown in Figs. 2 and 4, the fixing part 30 of this embodiment has a step formed between the first fixing plate part 31 and the second fixing plate part 32 by the connecting plate part 33. As a result, the first fixing plate part 31 is disposed closer to the bathtub 130 than the second fixing plate part 32. Therefore, the fixing part 30 of this embodiment can easily remove the protrusion caused by the step between the wall main body 124a and the inclined surface 124b formed on the inner wall surface 124. Furthermore, because a gap is formed by the step between the function unit 1 and the second fixing plate part 32, interference between the fixing screw 35 that fixes the second fixing plate part 32 to the inner wall surface 124 and the function unit 1 can also be avoided.

Figure 9 shows an example in which the mounting member 2 is used to mount the functional unit 1 to the inner wall surface 124 having an inclined surface 124c that slopes along the Y1-Y2 direction. In this case, only the fixing part of the mounting member 2 is changed to the fixing part 30A. The connecting plate part 33 of the fixing part 30A connects the first fixing plate part 31 and the second fixing plate part 32 at an angle so as to follow the inclined surface 124c. In this way, the mounting member 2 can install the functional unit 1 in the bathtub underspace S while maintaining the appropriate orientation and posture by forming the connecting plate part 33 of the fixing part 30 into various shapes according to the wall shape of the mounting area where the functional unit 1 is to be mounted.

The second fixing plate portion 32 of the fixing portion 30 may be attached to the inner wall surface 124 via a spacer 200 formed into an appropriate shape, as shown in FIG. 10, if necessary.

As described above, the mounting structure for the functional unit 1 in this embodiment is a mounting structure for the functional unit 1 placed in the space under the bathtub S, and includes a support part 20 that supports the functional unit 1 and a fixing part 30 that fixes the support part 20, and the functional unit 1 is mounted inside the space under the bathtub S via the support part 20 and the fixing part 30. This allows the fixing part having the most suitable shape to be selected and used depending on the shape of the wall surface to which the functional unit 1 is to be mounted. Therefore, the functional unit 1 can be easily mounted at any position inside the space under the bathtub S. Since only the fixing part 30 of the mounting member 2 needs to be changed, the functional unit 1 can be mounted on various wall surfaces with minimal design changes.

The functional unit 1 of this embodiment is attached to the inner wall surface 124 facing the space under the bathtub S. This increases the amount of free space in the space under the bathtub S that can be accessed from the washing area floor 110 side. This allows for effective use of the space under the bathtub S.

The fixing portion 30 in this embodiment has a shape that allows the functional unit 1 to be positioned while maintaining a predetermined orientation and posture relative to the shape of the inner wall surface 124. This allows the functional unit 1 to be securely fixed in an appropriate orientation and posture regardless of the shape of the wall surface on which the functional unit 1 is installed.

The fixing part 30 of this embodiment has a first fixing plate part 31 that fixes the support part 20, a second fixing plate part 32 that is attached to the inner wall surface 124, and a step formed by a connecting plate part 33 between the first fixing plate part 31 and the second fixing plate part 32. The first fixing plate part 31 is arranged on the bathtub 130 side from the second fixing plate part 32 via the step. With this, even if there is a protrusion on the wall surface on which the functional unit 1 is installed, the fixing part 30 can easily escape the protrusion by the step. Since a gap of the step is formed between the functional unit 1 and the second fixing plate part 32, interference between the functional unit 1 and the fixing screw 35 that fixes the second fixing plate part 32 to the inner wall surface 124 can also be avoided.

The functional unit 1 of this embodiment is removably attached to the support part 20. This makes it easy to perform replacement work etc. even after the functional unit 1 has been installed.

The support part 20 of this embodiment has a first hook part 23 and a second hook part 24 that hook the functional unit 1. This allows the support part 20 to easily attach and detach the functional unit 1.

In this embodiment, the bottom surface 1c of the functional unit 1 is positioned away from the protruding surface 121a, which is the bottom surface of the bathtub lower space S. This makes it possible to avoid interference with the bottom surface of the bathtub lower space S even if there is a part that protrudes downward from the bottom surface 1c of the functional unit 1.

In the above embodiment, the functional unit 1 is attached to the inner wall surface 124 of the vertical wall portion 122B on the short side of the waterproof pan 120. The attachment position of the functional unit 1 is not limited to this, and it can be attached to various positions inside the space under the bathtub depending on the bathroom structure. For example, the functional unit 1 may be attached to the inner wall surface of the vertical wall portion 122A on the long side of the waterproof pan 120. The functional unit 1 may be attached to the inner wall surface of the apron body 123. The functional unit 1 may be attached to the outer wall surface of the bathtub 130.

The functional unit is not limited to being a component of a bathtub cleaning device. For example, the functional unit may be a unit that incorporates equipment for controlling the jet bath pump.

1 Functional unit, 20 Support part, 23 First hook part, 24 Second hook part, 30 Fixing part, 31 First fixing plate part, 32 Second fixing plate part, 33 Connection plate part (step), 124 Inner wall surface, 121a Protruding surface (bottom surface), S Bathtub lower space

Claims (7)

A mounting structure for a functional unit to be placed in a space under a bathtub,
A support portion that supports the functional unit;
a fixing portion formed of a member separate from the support portion and having a surface to which the support portion is fixed ;
The fixing part is fixed to the inner wall surface of the standing wall part facing the bathtub lower space, and the surface to which the support part is fixed is arranged so as to face the bathtub lower space from the inner wall surface,
A mounting structure for a functional unit, in which the functional unit supported by the support portion is attached to the inner wall surface by being fixed to the fixing portion via the support portion. The functional unit mounting structure according to claim 1 , wherein the fixing portion has a shape that allows the functional unit to be arranged while maintaining a predetermined orientation and posture relative to a shape of the inner wall surface. The functional unit mounting structure according to claim 2 , wherein the fixing portion has a first fixing portion that fixes the support portion, and a second fixing portion that is attached to the inner wall surface. A step is provided between the first fixing portion and the second fixing portion,
The functional unit mounting structure according to claim 3 , wherein the first fixing portion is disposed closer to the bathtub than the second fixing portion via the step. The functional unit mounting structure according to any one of claims 1 to 4 , wherein the functional unit is detachably mounted on the support portion. The functional unit mounting structure according to claim 5 , wherein the support portion has a hook portion for hooking the functional unit. The functional unit mounting structure according to any one of claims 1 to 6 , wherein the bottom surface of the functional unit is disposed at a distance from the bottom surface of the bathtub lower space.

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