JP7622764B2 - Lighting device, wall-hung flush toilet having the same, and cabinet provided behind the flush toilet - Google Patents

Description

The present invention relates to a lighting device, a wall-hung flush toilet equipped with the lighting device, and a cabinet installed behind the flush toilet, and in particular to a lighting device that illuminates the floor surface below the flush toilet in a toilet room, a wall-hung flush toilet equipped with the lighting device, and a cabinet installed behind the flush toilet.

Conventionally, lighting devices that illuminate the floor surface below a flush toilet in a toilet room include lighting devices that are attached to a part of the toilet body of a wall-hung flush toilet (see, for example, Patent Documents 1 and 2) and lighting devices that are attached to a cabinet or inside the wall behind the toilet body of a wall-hung flush toilet (see, for example, Patent Document 3).
The conventional lighting devices described in Patent Documents 1 to 3 are different from lighting devices that irradiate light to brighten the entire toilet room, in that the amount of light, etc. is relatively small and light is only irradiated onto a partial area of the floor surface below the flush toilet.

JP 2021-147889 A JP 2021-141961 A JP 2018-79056 A

However, with the conventional lighting devices described in Patent Documents 1-3 mentioned above, for example, when a user urinates while standing in a dark toilet room, even if the lighting device shines light onto only a partial area of the floor below the flush toilet, the space in front of the toilet body will be dark for the user, making it difficult for the user to grasp his or her own standing position within this space and the appropriate distance from the toilet body, resulting in the problem that it is difficult to maintain a consistent standing position on the floor below the toilet each time the toilet is used.
This results in the problem that when a user urinates while standing, the user cannot maintain an appropriate distance between the user and the toilet body, making it impossible to prevent urine from splashing or splashing from the toilet body.
Another problem is that urine splashes and splatters from the toilet bowl itself, making cleaning the flush toilet and the surrounding area of the toilet room much more difficult.
Therefore, in recent years, a need has arisen for a way to guide a user's standing position so as to maintain an appropriate distance between themselves and the toilet bowl when urinating while facing the bowl, even when the toilet room is dark, and to prevent urine from splashing or splashing from the bowl.

The present invention has been made to solve the problems of the prior art and the problems that have been required in recent years, and aims to provide a lighting device that can guide a user to an appropriate fixed position on the floor below a flush toilet in a toilet room even when it is dark, a wall-hung flush toilet that has the lighting device, and a cabinet installed behind the flush toilet.

In order to solve the above-mentioned problems, the present invention provides a lighting device that illuminates the floor surface below a flush toilet in a toilet room, the lighting device main body being provided in the flush toilet or in a cabinet or wall behind it, the flush toilet having a toilet body including a bowl portion for receiving waste and a drain trap portion having an inlet portion connected below the bowl portion for discharging the waste within the bowl portion, the lighting device main body being positioned rearward of the front end of the toilet body, and configured so that light emitted from the lighting device main body is blocked by a part of the toilet body, forming a shadow on the floor surface to guide the user.
In the present invention configured in this manner, the lighting device main body installed in the flush toilet or in the cabinet or wall behind it is positioned rearward of the front end of the toilet body, so that light emitted from this lighting device main body is blocked by part of the toilet body, forming a shadow on the floor below the flush toilet in the toilet room to guide the user.
This makes it possible to reliably guide the user to a proper fixed position on the floor below the flush toilet in the toilet room, even if the toilet room is dark.
Therefore, for example, when a user (male) urinates while standing, facing into the bowl portion of the toilet body of a flush toilet, the shadow guidance can maintain an appropriate distance between the user and the toilet body, preventing urine from splashing or splashing from the toilet body.

In the present invention, preferably, the lighting device main body is arranged below and behind the toilet main body and is configured to form a shadow on the floor surface in front of the toilet main body to guide the user.
In the present invention configured in this manner, the lighting device main body installed in the flush toilet or in the cabinet or wall behind it is positioned below and behind the toilet body, so that the light emitted from this lighting device main body can form a shadow on the floor surface in front of the flush toilet body to guide the user.
Therefore, even if the toilet room is dark, the user can visually check the shadow on the floor in front of the toilet body to ascertain the user's standing position and the relative distance between this standing position and the toilet body.
Therefore, the user can be more reliably guided to an appropriate fixed position on the floor surface in front of the toilet body of the flush toilet in the toilet room without having to look directly at the bright light.
Therefore, for example, when a user urinates while standing toward the bowl portion of the toilet body, the shadow guides the user to an appropriate fixed position on the floor in front of the toilet body, maintaining an appropriate distance between the user and the toilet body, thereby preventing urine from splashing or splashing from the toilet body.

In the present invention, the lighting device main body is preferably positioned in the center of the left-right width of the toilet body, and is configured to form a shadow whose width in the left-right direction increases with increasing distance from the toilet body.
In the present invention configured in this manner, the lighting device main body is positioned in the center of the left-right width of the toilet body of the flush toilet, and can form a shadow whose width in the left-right direction increases the further it is from the toilet body.
This makes it easier for a user to grasp the centre of the toilet body in the left-right width direction when urinating while standing, facing into the bowl portion of the toilet body, making it easier to guide the user to the appropriate fixed position near the centre of the toilet body in the left-right width direction on the floor surface in front of the toilet body of a flush toilet in a toilet room.
Therefore, when a user urinates while standing toward the bowl portion of the toilet body, the distance between the user and the toilet body and the center position of the toilet body in the left-right width direction can be properly maintained, thereby preventing urine from spilling over the toilet body and preventing urine from splashing or splashing from the toilet body.

In the present invention, it is preferable further that the drain trap portion forms a curved piping that descends to the lowest end rear and below the inlet portion and then rises to a top rear and above the inlet portion, and the lighting device main body is positioned rearward of the lowest end of the drain trap portion, and is configured so that light irradiated from the lighting device main body is blocked by the drain trap portion to form a shadow.
In the present invention configured in this manner, since the lighting device main body is positioned rearward of the lowest end of the drain trap portion of the toilet body, the light emitted from the lighting device main body is blocked by the drain trap portion of the toilet body, so that a shadow can be reliably formed on the floor surface in front of the toilet body of the flush toilet to guide the user.
As a result, for example, when a user urinates while standing toward the bowl portion of the toilet body, the shadow guides the user to an appropriate fixed position on the floor in front of the toilet body, maintaining an appropriate distance between the user and the toilet body, thereby preventing urine from splashing or splashing from the toilet body.

In the present invention, preferably, the lighting device further comprises a human body detection sensor that detects the position of a user, and a control unit that controls the lighting device main body, and the control unit changes the light irradiated from the lighting device main body based on a signal obtained from the human body detection sensor.
In the present invention configured in this manner, the control unit that controls the lighting device main body can change the light irradiated from the lighting device main body (e.g., the illuminance of the light, the flashing of the light, the color of the light, etc.) based on a signal obtained from the human body detection sensor that detects the position of the user.
Therefore, the light from the lighting device main body changed by the control unit can form a shadow on the floor surface below the flush toilet in the toilet room to guide the user, so that even if the inside of the toilet room is dark, a user who sees the outline of the shadow projected on the floor surface below the flush toilet can know whether or not they are in the correct designated position on the floor surface below the flush toilet, and the user can be reliably guided to the designated position on the floor surface below the flush toilet in the toilet room.
Therefore, for example, when a user urinates while standing toward the bowl portion of the toilet body, the shadow guidance can maintain an appropriate distance between the user and the toilet body, preventing urine from splashing or splashing from the toilet body.

The present invention also relates to a wall-hung flush toilet having the above-mentioned lighting device.
Configured in this way, the present invention can provide a wall-hung flush toilet with a lighting device that can reliably guide the user to an appropriate, fixed position on the floor below the flush toilet in the toilet room when the user urinates while standing, toward the inside of the bowl portion of the toilet body, and that can prevent urine from splashing or splashing from the toilet body.

The present invention also relates to a cabinet provided behind the flush toilet, comprising the lighting device according to any one of claims 1 to 5 above.
Configured in this manner, the present invention can provide a cabinet located behind the flush toilet that can reliably guide the user to an appropriate, fixed position on the floor below the flush toilet in the toilet room when the user urinates while standing, toward the bowl portion of the toilet body, and that has a lighting device that can prevent urine from splashing or splashing from the toilet body.

The lighting device of the present invention, the wall-hung flush toilet equipped with the lighting device, and the cabinet installed behind the flush toilet make it possible to guide the user to an appropriate fixed position on the floor below the flush toilet in the toilet room, even when the toilet room is dark.

FIG. 1 is an exploded perspective view showing a wall-hung flush toilet according to an embodiment of the present invention fixed to a wall. FIG. 2 is a central side cross-sectional view showing a state in which a wall-hung flush toilet according to an embodiment of the present invention is fixed to a wall. FIG. 2 is a bottom view of a wall-hung flush toilet according to one embodiment of the present invention. FIG. 1 is a plan view of a wall-hung flush toilet according to an embodiment of the present invention. 4 is a cross-sectional view taken along line VV in FIG. 3. FIG. 1 is a schematic central side cross-sectional view of a wall-hung flush toilet according to one embodiment of the present invention, showing a state in which a lighting device projects light onto a floor surface to form a shadow on the floor surface in front of the toilet body to guide a user. FIG. 1 is a schematic perspective view of a wall-hung flush toilet according to one embodiment of the present invention, showing a state in which a lighting device is shining light onto a floor surface to form a shadow on the floor surface in front of the toilet body to guide a user.

A wall-hung flush toilet according to one embodiment of the present invention will be described below with reference to Figs. 1 to 7.
First, Fig. 1 and Fig. 2 respectively show an exploded perspective view and a central side cross-sectional view of a wall-hung flush toilet according to one embodiment of the present invention, showing the state in which the toilet is fixed to a wall.
As shown in Figures 1 and 2, a wall-hung flush toilet 1 according to one embodiment of the present invention has a toilet body 2 whose rear end (rear wall portion 2a) is fixed to a rear wall W within a toilet room T, and is positioned so that the bottom end of the toilet body 2 is spaced above the floor surface F.
Furthermore, as shown in Figure 1, the wall-hung flush toilet 1 of this embodiment, more specifically, is structured in such a way that the toilet body 2 is fixed from the back side of the wall by a fixing unit U provided on the back side of a wall W (the back side of the wall).
Furthermore, on the fixed unit U side, there are provided a flush water supply device 4, which is a water supply source that supplies flush water to the toilet body 2 of the flush toilet 1, and a flush operation device 6 that operates this flush water supply device 4, and these devices 4, 6 are structured to be concealed behind the wall W.
Note that in the flush toilet 1 of this embodiment, the flush water supply device 4, which is the water supply source that supplies flush water to the toilet body 2, is a form that employs a so-called "gravity-fed" water storage tank 4a, in which flush water stored in the water storage tank 4a is supplied to the toilet body 2 by gravity, but as another form of water supply source, a so-called "direct water supply pressure" water supply device may also be employed, in which flush water is supplied directly to the toilet body 2 by utilizing water supply pressure from a water supply.
In addition, a "flush valve type" water supply device or a "pump type" water supply device that supplies flush water stored in a water tank by utilizing the pressure of a pump may be used.

Next, as shown in Figures 1 and 2, the toilet body 2 of the flush toilet 1 of this embodiment is a ceramic toilet body 2 made from ceramic.
The ceramic toilet body 2 also includes a bowl portion 8 for receiving waste, and a drain trap portion 10 having an inlet portion 10a connected to the lower portion of the bowl portion 8 for discharging the waste within the bowl portion 8.
Furthermore, the ceramic toilet body 2 has a skirt portion 12 that covers the outer contours of the bowl portion 8 and the drain trap portion 10 from the sides, and a rear end portion (rear wall portion 2a) that is formed behind this skirt portion 12 and fixed to the wall W.
As shown in FIG. 2, the drain trap portion 10 of the toilet body 2 forms a curved pipe 10d that descends to the lowest end 10b rearward and below the inlet portion 10a and then rises to a top 10c rearward and above the inlet portion 10a, and also forms a descending pipe 10e that descends rearward and downward from the top 10c of the curved pipe 10d.

Next, Fig. 3 is a bottom view of a wall-hung flush toilet according to one embodiment of the present invention. Also, Fig. 4 is a plan view of a wall-hung flush toilet according to one embodiment of the present invention. Furthermore, Fig. 5 is a cross-sectional view taken along line V-V in Fig. 3.
As shown in Figures 2, 3, and 5, a lighting device 14, details of which will be described later, is provided within the internal space V of the toilet body 2 behind the lowest end 10b of the drain trap portion 10 and above the lower end 12a of the skirt portion 12.
The lighting device 14 is fixed to the rear wall 2 a of the toilet body 2 and is capable of irradiating light onto the floor surface F below the toilet body 2 .
Also, as shown in Figures 2 and 4, the light L emitted from the lighting device main body 14a of the lighting device 14 is blocked by a part of the toilet body 2 (e.g., a part of the drain trap section 10, etc.), and a shadow S is formed on the floor surface F in front of the toilet body 2 to guide the user M's standing position.

Next, as shown in Figures 1, 2, 4 and 5, in the toilet body 2 made of ceramic and fixed to a wall W by a fixing unit U, the inlet portion 16a, which is the upstream end (rear end) of the main water passage 16 formed on the upstream side of the bowl portion 8, is connected to a water supply pipe 18 extending downstream from the water storage tank 4a of the flush water supply device 4.
On the other hand, in the toilet body 2 made of ceramic and fixed to a wall W by a fixing unit U, the outlet portion 10f, which is the downstream end (rear end) of the drain trap portion 10, is connected to a drain pipe 20 which extends upward from the floor surface F on the back side of the wall W and then bends forward and extends.
Here, the wall-hung flush toilet 1 of this embodiment may be a so-called "wash-down" flush toilet, in which waste within the bowl portion 8 is washed away by the vertical drop in the bowl portion 8 inside the toilet body 2, or it may be another type of flush toilet, such as a so-called "siphon type" flush toilet, in which waste within the bowl portion 8 is sucked up using the siphon action and discharged to the outside through the drain trap portion 10.

As shown in Figures 2 and 4, a functional section D including a private parts cleaning device WL for cleaning the private parts of the user M is provided on the upper surface of the toilet body 2 behind and above the bowl section 8.
This functional part D further comprises a human body detection sensor 22 and a controller 24. The human body detection sensor 22 is provided in part of the front side of the functional part D, and is a sensor that detects the position of a user M of the flush toilet 1.
The controller 24 is a control unit that can control the operation of the local cleaning device WL and also control the lighting device main body 14a.
Furthermore, the controller 24 is configured to transmit a signal 28 to the lighting device main body 14a for changing the light L irradiated from the lighting device main body 14a based on a signal 26 transmitted from the human body detection sensor 22.
Incidentally, as shown in Figure 4, the detection range A0 of the human body detection sensor 22, when viewed in a plane, is a semicircular arc-shaped detection range A0 with a radius R1 (for example, R1 = 300 mm) centered on the center O1 in the left-right width direction at the front end 2b of the toilet body 2.
Further, the lighting device 14 is electrically connected to a power source (not shown) of the functional unit D via a power supply cable (not shown).

Next, the lighting device 14 of the wall-hung flush toilet 1 according to the present embodiment will be described in detail with reference to Figs. 2 to 7.
Figures 6 and 7 are a schematic central side cross-sectional view and a schematic oblique view, respectively, of a wall-hung flush toilet 1 according to one embodiment of the present invention, and show a state in which the lighting device 14 is emitting light onto the floor surface F to form a shadow S on the floor surface F in front of the toilet body 2 to guide the user M.

First, as shown in Figures 2 to 6, the main body 14a of the lighting device 14 is positioned rearward of the front end 2b of the toilet body 2, and is positioned below and rearward of the toilet body 2, and more specifically, is provided within the internal space V of the toilet body 2 below the descending pipe 10e of the drain trap portion 10 of the toilet body 2.
Next, as shown in Figure 6, the main body 14a of the lighting device 14 is fixed to the front side of the rear wall 2a of the toilet body 2, and is positioned so that the center L0 of the irradiated light L is located forward of the rear wall 2a of the toilet body 2.
Also, as shown in Figure 6, the main body 14a of the lighting device 14 is positioned so that the light L1 emitted to the forwardmost side overlaps with a part of the curved pipe 10d of the drain trap section 10 of the toilet body 2 (such as the lowest end 10b of the curved pipe 10d) and is emitted forward of this lowest end 10b.
Furthermore, as shown in FIG. 6, the main body 14a of the lighting device 14 is disposed so that the center L0 of the emitted light L is located forward of the bottom end 10b of the drain trap portion 10 of the toilet body 2.

As a result, the light L emitted from the main body 14a of the lighting device 14 is blocked by part of the toilet body 2, forming a shadow S on the floor surface F in front of the toilet body 2 to guide the user M.
On the other hand, the light L irradiated from the lighting device main body 14a is irradiated onto a specified floor area A1 directly below the toilet body 2 behind the shadow S of the floor surface F and in front of and behind the lowest end 10b of the drain trap section 10, so that the center O2 of the irradiation area of the light L is positioned within the specified floor area A1 directly below the toilet body 2.

As shown in FIGS. 3 to 5, the main body 14a of the lighting device 14 is disposed in the center portion 2c of the toilet body 2 in the left-right width direction.
As a result, as shown in Figures 4 and 7, when a shadow S is formed on the floor surface F in front of the toilet body 2 by the light emitted from the main body 14a of the lighting device 14, the shape of this shadow S expands in width w1 in the left-right direction as it moves away from the toilet body 2.

Next, the operation of the lighting device 14 of the wall-hung flush toilet 1 according to one embodiment of the present invention will be explained with reference to FIGS. 1 to 7.
According to the lighting device 14 of the wall-hung flush toilet 1 in this embodiment described above, the main body 14a of the lighting device 14 provided on the flush toilet 1 is positioned rearward of the front end 2b of the toilet body 2.
As a result, the light L emitted from the main body 14a of the lighting device 14 is blocked by part of the toilet body 2, forming a shadow S on the floor surface F below the flush toilet 1 in the toilet room T to guide the user M.
This makes it possible to reliably guide the user M to the appropriate fixed position P0 on the floor surface F below the flush toilet 1 in the toilet room T, even if the toilet room T is dark.
Therefore, for example, when a user (male) M urinates while standing, facing into the bowl portion 8 of the toilet body 2 of the flush toilet 1, the guidance of the shadow S can properly maintain the front-to-rear distance d1 between the center O1 in the left-to-right width direction of the front end 2b of the toilet body 2 in the plan view of Figure 4 and the tip (rear end) P1 of the shadow S, as well as the front-to-rear distance d2 between the user M and the front end 2b of the toilet body 2, thereby preventing urine from splashing or splashing from the toilet body 2.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, the main body 14 a of the lighting device 14 provided on the flush toilet 1 is positioned below and behind the toilet body 2 .
As a result, the light L emitted from the main body 14a of the lighting device 14 can form a shadow S on the floor surface F in front of the toilet body 2 of the flush toilet 1 to guide the user M.
Therefore, even if it is dark inside the toilet room T, the user M can visually check the shadow S on the floor surface F in front of the toilet body 2 and grasp the user M's standing position P0 and the relative distance d2 between this standing position P0 and the toilet body 2.
Therefore, the user M can be more reliably guided to the appropriate fixed position P0 on the floor surface F in front of the toilet body 2 of the flush toilet 1 in the toilet room T without the user M looking directly at the bright light.
Therefore, for example, when a user M urinates while standing toward the bowl portion 8 of the toilet body 2, the distance d2 between the user M, who is guided by the shadow S to the appropriate fixed position P0 on the floor surface F in front of the toilet body 2, and the toilet body 2 can be appropriately maintained, and urine splashing or splashing from the toilet body 2 can be suppressed.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, its main body 14a is positioned in the center 2c in the left-right direction of the toilet body 2 of the flush toilet 1, and is able to form a shadow S whose left-right width w1 increases the further it gets from the toilet body 2.
This makes it easier for user M to grasp the center 2c in the left-right width direction of the toilet body 2 when urinating while standing toward the bowl portion 8 of the toilet body 2, making it easier to guide user M to the appropriate fixed position P0 near the center in the left-right width direction of the toilet body 2 on the floor surface F in front of the toilet body 2 of the flush toilet 1 in the toilet room T.
Therefore, when a user M urinates while standing toward the bowl portion 8 of the toilet body 2, the distance d2 between the user M and the toilet body 2 and the position of the center O1 in the left-right width direction of the front end 2b of the toilet body 2 can be properly maintained, thereby preventing urination from spilling over the toilet body 2 and preventing urine from splashing or splashing from the toilet body 2.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, its main body 14 a is positioned rearward of the bottom end 10 b of the drain trap portion 10 of the toilet body 2 .
As a result, a portion of the light L emitted from the main body 14a of the lighting device 14 is blocked by the drain trap portion 10 of the toilet body 2, thereby reliably forming a shadow S on the floor surface F in front of the toilet body 2 of the flush toilet 1 to guide the user M.
As a result, for example, when a user M urinates while standing toward the bowl portion 8 of the toilet body 2, the distance d2 between the user M, who is guided by the shadow S to the appropriate fixed position P0 on the floor surface F in front of the toilet body 2, and the toilet body 2 can be properly maintained, thereby preventing urine from splashing or splashing from the toilet body 2.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, the controller 24 that controls the main body 14a is able to change the light L (for example, the illuminance of the light, the flashing of the light, the color of the light, etc.) emitted from the main body 14a of the lighting device 14, based on a signal 26 obtained from the human body detection sensor 22 that detects the position of the user M.
Therefore, the light L from the main body 14a of the lighting device 14, which is changed by the controller 24, can form a shadow S on the floor surface F below the flush toilet 1 in the toilet room T to guide the user M.
For example, when a user M enters the toilet room T and within the detection range A0 of the human body detection sensor 22, the human body detection sensor 22 detects the presence of the user M, and then the power (not shown) of the lighting device 14 is turned on. This causes light L to be irradiated from the main body 14a of the lighting device 14 to a specified floor area A1 below the flush toilet 1.
At this time, the user M within the detection range A0 cannot directly see the light L irradiated from the main body 14a of the lighting device 14, but the closer the user M within the detection range A0 gets to the toilet body 2, the greater the illuminance of the light L irradiated from the main body 14a of the lighting device 14 becomes, and the outline S1 of the shadow S is clearly projected on the floor surface F.
Then, when a user M within the detection range A0 stands in the appropriate standing position (fixed position) P0, the controller 24 receives a signal 26 from the human body detection sensor 22 that detects this, determines that the distance d2 between the user M and the toilet body 2 is appropriate, and sends a signal 28 to the main body 14a of the lighting device 14 to flash the light L, thereby notifying the user M that he is in the appropriate standing position P0.
As a result, even if it is dark inside the toilet room T, a user M who sees the outline S1 of the shadow S projected on the floor surface F below and in front of the flush toilet 1 can know whether or not he or she is in the correct fixed position P0 on the floor surface F below and in front of the flush toilet 1, and therefore the user M can be reliably guided to the fixed position P0 on the floor surface F below the flush toilet 1 in the toilet room T.
Therefore, for example, when a user M urinates while standing toward the bowl portion 8 of the toilet body 2, the distance d2 between the user M and the toilet body 2 can be appropriately maintained by the guidance of the shadow S, and the splashing or splashing of urine from the toilet body 2 can be suppressed.

In addition, the lighting device 14 of the wall-hung flush toilet 1 according to this embodiment can reliably guide the user M to the appropriate fixed position P0 on the floor surface F below the flush toilet 1 in the toilet room T when the user M urinates while standing toward the inside of the bowl portion 8 of the toilet body 2, and can provide a wall-hung flush toilet 1 with a lighting device 14 that can prevent urine from splashing or splashing from the toilet body 2.

Incidentally, with regard to the lighting device 14 of the wall-hung flush toilet 1 of the embodiment described above, a form has been described in which the lighting device 14 is provided within the internal space V of the toilet body 2 behind the lowest end 10b of the drain trap portion 10 in the toilet body 2 and above the lower end 12a of the skirt portion 12, however, this is not limited to such a form, and in other embodiments, the lighting device 14 may be provided on the wall W side behind the toilet body 2 or on the cabinet side or inside the wall surface, at a location below the toilet body 2 so as not to be visible from the user of the toilet body 2.
According to the lighting device 14 of this other embodiment, when a user M urinates while standing toward the bowl portion 8 of the toilet body 2, the user M can be reliably guided to the appropriate fixed position P0 on the floor surface F below the flush toilet 1 in the toilet room T, and a cabinet can be provided that has a lighting device 14 that can prevent urine from splashing or splashing from the toilet body 2.

REFERENCE SIGNS LIST 1 Wall-hung flush toilet 2 Toilet body 2a Rear end of toilet body, rear wall 2b Front end of toilet body 2c Centre of toilet body in left-right width direction 4 Flush water supply device 4a Water storage tank 6 Flush operation device 8 Bowl 10 Drain trap 10a Inlet of drain trap 10b Bottom end of drain trap 10c Top of drain trap 10d Bent pipe of drain trap 10e Descending pipe of drain trap 10f Outlet of drain trap 12 Skirt 12a Bottom end of skirt 14 Lighting device 14a Main body of lighting device (lighting device main body)
16 Main waterway 16a Inlet of main waterway 18 Water supply pipe 20 Drain pipe 22 Human body detection sensor 24 Controller (control unit)
26 Signal 28 Signal A0 Detection range A1 Predetermined floor area onto which light is irradiated D Functional part d1 Front-rear distance between the center of the left-right width direction of the front end of the toilet body and the tip (rear end) of the shadow d2 Front-rear distance between the user and the front end of the toilet body F Floor surface inside the toilet room and behind the wall L Irradiated light L0 Center of irradiated light L1 Light irradiated to the frontmost side M User O1 Center of the left-right width direction of the front end of the toilet body O2 Center of the irradiation area of the floor P0 Standing position of the user, fixed position P1 Tip of the shadow, rear end of the shadow S Shadow S1 Contour of the shadow T Toilet room U Fixed unit V Internal space of the toilet body W Wall WL Local cleansing device w1 Left-right width of the shadow

Claims (4)

A lighting device that illuminates a floor surface below a flush toilet in a toilet room,
The lighting device has a main body that is installed in the flush toilet or in a cabinet or wall behind the flush toilet,
The flush toilet is provided with a toilet body including a bowl portion for receiving waste, and a drain trap portion having an inlet portion connected to the lower portion of the bowl portion for discharging waste within the bowl portion,
The drain trap portion is disposed in the center of the toilet body, and forms a curved pipe that descends to a lowermost end portion behind and below the inlet portion and then ascends to a top portion behind and above the inlet portion,
The lighting device main body is arranged in the center of the left-right width direction of the toilet body, and is arranged rearward of the drain trap section and above the lowest end portion of the drain trap section , and is configured to irradiate light at least onto the floor surface in front of the toilet body, and the light irradiated from the lighting device main body is blocked by a part of the drain trap section to form a shadow on the floor surface to guide the user, and the shadow is a shadow of the drain trap section that is formed so that its left-right width increases as it moves forward from the rear end of the shadow, which is located a first distance forward from the center of the left-right width direction of the front end of the toilet body, and the lighting device is characterized in that the first distance in the front-to-rear direction between the center of the left-right width direction of the front end of the toilet body and the rear end of the shadow, and a second distance between the user and the front end of the toilet body are maintained . The lighting device further includes a human body detection sensor that detects the position of a user, and a control unit that controls the lighting device body,
2. The lighting device according to claim 1, wherein the control unit changes the light emitted from the lighting device body based on a signal obtained from the human body detection sensor. A wall-hung flush toilet having the lighting device according to claim 1 or 2 . A cabinet having the lighting device according to claim 1 or 2 and provided behind the flush toilet.

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