JP7709671B2 - Lighting device and wall-hung flush toilet equipped with same - Google Patents

Description

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

Known lighting devices that illuminate the floor surface below a toilet include those 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 those that are attached to a cabinet behind the toilet body of a wall-hung flush toilet (see, for example, Patent Document 3).
The conventional lighting devices described in these Patent Documents 1 to 3 are installed below the toilet body, which is difficult for users to access, or below a cabinet behind the toilet body, and are made up of a number of components.

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

However, in the conventional lighting devices described in the above-mentioned Patent Documents 1 to 3, there are gaps between the multiple components, and if dirt gets into such gaps, it is difficult to remove the dirt, resulting in a problem of reduced cleanability.
Therefore, in recent years, there has been a demand for improving the ease of cleaning the toilet bowl and the lighting device provided in the cabinet behind it.

The present invention was 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 illuminate the floor surface below the toilet and is easy to clean, as well as a wall-hung flush toilet equipped with the same.

In order to solve the above-mentioned problems, the present invention provides an illumination device that illuminates the floor surface below a toilet, comprising: a fixing part that is fixed to the toilet or a cabinet behind it; a light-emitting part that is attached to the fixing part and includes a light source that emits light; and a light-transmitting cover that is formed of a light-transmitting material and covers the light-emitting part, wherein when the light-transmitting cover is fixed to the toilet or the cabinet by the fixing part, its exposed surface portion is made of a single member that is formed integrally without any gaps.
In the present invention configured in this manner, the light emitted from the light source of the light-emitting unit passes through the translucent cover that covers the light-emitting unit and is irradiated onto the floor surface below the toilet, thereby brightly illuminating the space and floor surface below the toilet.
Furthermore, since the exposed surface portion of the translucent cover, when fixed to the toilet or cabinet by the fixing part, is made of a single member that is integrally formed without any gaps, the risk of dirt getting into the gaps in the surface portion of the translucent cover can be eliminated.
Furthermore, even if dirt adheres to the surface of the translucent cover, since the translucent cover is made of a single member that is formed integrally without any gaps, it is easy to wipe the surface, thereby improving cleaning performance.

In the present invention, preferably, the device further includes a fixing member for fixing the light source within the light-transmitting cover, and this fixing member is arranged to shield the upper side of the light source so that the light emitted from the light source does not diffuse upward.
In the present invention configured in this manner, the fixing member that fixes the light source of the light-emitting unit within the translucent cover is arranged to shield the above of the light source so that the light emitted from the light source does not diffuse upwards. Therefore, this fixing member prevents the light emitted from the light source of the light-emitting unit from diffusing upwards, reducing the occurrence of unnecessary reflected light and shadows, while ensuring that the light is diffused onto the floor surface below the toilet.

In the present invention, preferably, the liquid crystal display device further comprises a light blocking portion arranged below the light source, and this light blocking portion is formed with an opening portion through which light emitted from the light source can pass.
In the present invention configured in this manner, the shading section is positioned below the light source of the light-emitting section, and an opening is formed through which the light emitted from the light source can pass, allowing the light emitted from the light source to pass through.As a result, when the light emitted from the light source of the light-emitting section passes through the opening in the shading section and is irradiated onto the floor surface below the toilet, the brightness of the light passing through the opening can be adjusted, and the directionality of the light can be increased by passing the light through the opening in the shading section.

In the present invention, preferably, the device further comprises an auxiliary light-shielding member provided between the fixing member and the light-transmitting cover.
In the present invention thus configured, the auxiliary light-shielding member provided between the fixing member and the light-transmitting cover can eliminate any gap between the fixing member and the light-transmitting cover.
Therefore, it is possible to prevent light emitted from the light source of the light-emitting portion from being irradiated onto the floor surface below the toilet bowl from anywhere other than the opening of the light-shielding portion.

In the present invention, the light-transmitting cover preferably has a surface on the irradiation side formed to be substantially flat.
In the present invention configured in this manner, the irradiation side surface of the translucent cover is formed to be approximately flat, so that when light emitted from the light source of the light-emitting unit passes through the irradiation side surface of the translucent cover and is irradiated onto the floor surface below the toilet, the spot-like feel of the light concentrated on a specific area of the floor surface can be enhanced.

The present invention also relates to a wall-hung flush toilet equipped with the above-mentioned lighting device.
With the present invention configured in this manner, it is possible to provide a wall-hung flush toilet equipped with a lighting device that can brightly illuminate the space below the toilet and the floor surface, while also improving cleaning ease.

The lighting device of the present invention and the wall-hung flush toilet equipped with it can illuminate the floor surface below the toilet, making it easy to clean.

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. 2 is a rear 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 perspective view of a wall-hung flush toilet lighting device according to one embodiment of the present invention, viewed obliquely from below. FIG. 1 is an exploded perspective view of a wall-hung flush toilet lighting device according to one embodiment of the present invention. FIG. 2 is a central side cross-sectional view of a lighting device fixed to a toilet body of a wall-hung flush toilet according to one embodiment of the present invention. 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 is irradiating light onto a floor surface. 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 irradiating light onto a floor surface.

A wall-hung flush toilet according to one embodiment of the present invention will be described below with reference to Figs. 1 to 10.
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.

FIG. 3 is a bottom view of a wall-hung flush toilet according to an embodiment of the present invention.
As shown in Figures 2 and 3, a lighting device 14, details of which will be described later, is provided within the internal space S 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 .

Next, FIG. 4 is a rear view of a wall-hung flush toilet according to one embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line VV in FIG.
As shown in Figures 1, 2, 4 and 5, in a state in which a ceramic toilet body 2 is fixed to a wall W by a fixing unit U, an inlet portion 16a, which is the upstream end (rear end) of a 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.

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 9.
Figure 6 is a perspective view of the lighting device 14 of a wall-hung flush toilet 1 according to this embodiment, seen from diagonally below. Additionally, Figure 7 is an exploded perspective view of the lighting device 14 of a wall-hung flush toilet 1 according to this embodiment. Furthermore, Figure 8 is a central side cross-sectional view of the lighting device 14 in a state where it is fixed to the toilet body 2 of a wall-hung flush toilet 1 according to this embodiment. Additionally, Figure 9 is a schematic central side cross-sectional view of a wall-hung flush toilet 1 according to one embodiment of the present invention, showing a state in which the lighting device 14 is irradiating light onto the floor surface F.

First, as shown in Figures 2, 3, 5, 6, 8 and 9, the lighting device 14 is provided within the internal space S of the toilet body 2 below the descending pipe 10e of the drain trap portion 10 of the toilet body 2.
9, a predetermined floor surface area that is irradiated with the entire light L emitted from the lighting device 14 is defined as an "irradiated area A." The outline of this irradiation area A in a plan view is substantially circular, and is the diffusion range A of the light L irradiated onto the floor surface F.
Moreover, the light irradiated to the center O1 of this irradiation area A (diffusion range A) is referred to as "light L1 at the center O1 of the diffusion range A."
Furthermore, of the entire light L irradiated from the lighting device 14 shown in Figure 9 to the irradiation area A (diffusion range A) of the floor surface F, the light L with the maximum illuminance is defined as the "light L2 of maximum illuminance," and the point O2 within the irradiation area A where this light L2 of maximum illuminance is irradiated is defined as the "center O2 of light L."
Next, as shown in FIG. 9, the lighting device 14 is disposed so that the center O2 of the light L2 of maximum illuminance that is emitted is located forward of the rear wall 2a of the toilet body 2.
Also, as shown in Figure 9, the lighting device 14 is positioned so that the light L3 emitted to the forwardmost side does not overlap with the bottom end 10b of the drain trap portion 10 of the toilet body 2, but is emitted forward of this bottom end 10b.
Furthermore, as shown in FIG. 9, the lighting device 14 is disposed so that the center O2 of the light L2 of maximum illuminance emitted is located behind the bottom end 10b of the drain trap portion 10 of the toilet body 2.
As shown in Figures 3, 5, 6, 8, and 9, the toilet body 2 has a wall surface S1 that forms an internal space S of the toilet body 2 in which the lighting device 14 is provided, and glaze G is applied to at least a portion of the surface of this wall surface S1.

Next, as shown in Figures 3 to 9, the lighting device 14 is fixed to the front side of the rear wall 2a of the toilet body 2, although details such as the configuration of each part and the internal structure will be described later.
The lighting device 14 is fixed to the rear wall 2a of the toilet body 2 by a pair of fastening members (tapping screws 22, 22 and washers 24, 24) from the rear side of the rear wall 2a.

Next, the configuration and internal structure of each part of the illumination device 14 will be described in detail with reference to FIGS.
First, as shown in Figures 6 to 8, the components of the lighting device 14, from the rear side to the front side, are a pair of tapping screws 22, 22, a pair of washers 24, 24, a ceramic side waterproof gasket 26, a plurality (four) of body fixing screws 28, 28, 28, 28, a housing 30, a power supply harness 32, an LED board 34, a plurality (two) of board fixing screws 36, 36, a body side waterproof gasket 38, and a translucent cover 40.
The housing 30 is made entirely of a light-blocking material (a material that does not easily transmit light), and a fixing portion 30a provided on the rear side is fixed from the rear side by a pair of fastening members (tapping screws 22, 22 and washers 24, 24).
As a result, the rear side of the fixing portion 30a of the housing 30 is fixed to the front side of the rear wall portion 2a of the toilet body 2 via the ceramic side water-stopping gasket 26.
The housing 30 also has a support receiving portion 30b that protrudes forward from the rear end portion of the housing 30. A side wall 30c of the support receiving portion 30b is formed in a generally rectangular shape in a plan view so as to surround the internal space.
Furthermore, an LED board 34 is attached to an upper end of the side wall 30c of the support receiving portion 30b of the housing 30. The LED board 34 is fixed to the support receiving portion 30b by a plurality of (two) board fixing screws 36, 36.
Here, the LED board 34 serves as a light-emitting section including a plurality (four) of light sources (LED elements 34a, 34a, 34a, 34a) arranged in the left-right direction on the lower surface thereof.
Furthermore, one end of the power supply harness 32 is electrically connected to a part of the LED board 34, and the other end is electrically connected via a connector (not shown) to a power supply cable (not shown) that supplies power to the functional parts (not shown) of the flush toilet 1.

Next, as shown in FIGS. 5 to 8, the light-transmitting cover 40 is made of a light-transmitting material and is attached to the support receiving portion 30b of the housing 30 and the LED board 34 so as to cover them from above, below, left and right sides, and from the front.
In addition, the rear side of the translucent cover 40 is fixed to the front side of the fixing portion 30a of the housing 30 via a body side water-tight gasket 38 by multiple (four) body fixing screws 28, 28, 28, 28 attached from the rear side of the fixing portion 30a of the housing 30.
Moreover, the light-transmitting cover 40 is made of a single member whose exposed surface portion is integrally formed without any breaks.
Furthermore, the light-transmitting cover 40 has a surface 40a (lower surface 40a) on the irradiation side formed to be substantially flat.

Furthermore, as shown in FIGS. 6 to 8, the LED board 34 is provided with a thin plate-shaped board member 34b on the underside of which a plurality of (four) light sources (LED elements 34a, 34a, 34a, 34a) are arranged in the left-right direction.
This substrate member 34b is a fixing member that fixes multiple (four) light sources (LED elements 34a, 34a, 34a, 34a) within the translucent cover 40, and also functions as a shielding member that shields the upper part of each of the light sources 34a, 34a, 34a, 34a so that the light L emitted from each of the light sources 34a, 34a, 34a, 34a does not diffuse upward.
More specifically, since the housing 30 itself is open upward, the board member 34b of the LED board 34 itself is designed to block the light that flows upward, and the light that goes around the LED board 34 and leaks upward is blocked by the housing 30 itself, which is made of a material that is difficult for light to pass through.

Next, the housing 30 includes a light-shielding portion 30d provided at the lower end of the support receiving portion 30b.
In addition, in this light-shielding portion 30d, openings 30e provided below each of the light sources 34a, 34a, 34a, 34a are formed so as to pass through the light-shielding portion 30d in the vertical direction so as to allow light L emitted from each of the light sources 34a, 34a, 34a, 34a to pass therethrough.

Furthermore, the housing 30 also serves as a fixing member that fixes the LED board 34 (the light sources 34 a, 34 a, 34 a, 34 a) inside the light-transmitting cover 40.
In addition, the main body side waterproof gasket 38 makes the gap between the front surface of the fixed portion 30a of the housing 30, which is such a fixing member, watertight, and the rear step portion (rear step portion 40b) in the light-transmitting cover 40 that faces this front surface in the front-to-rear direction, and also functions as a light-blocking auxiliary member that assists in blocking light so that light L emitted from each light source 34a, 34a, 34a, 34a does not shine out from the gap between the front surface of the fixed portion 30a of the housing 30 and the rear step portion 40b in the light-transmitting cover 40.

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 10.
FIG. 10 is a schematic perspective view of a wall-hung flush toilet 1 according to this embodiment, showing a state in which a lighting device 14 is irradiating light onto a floor surface F.
According to the lighting device 14 of the wall-hung flush toilet 1 of the present embodiment described above, light L emitted from the light source (LED elements 34a) of the light-emitting unit (LED board 34) passes through the translucent cover 40 that covers the light-emitting unit (LED board 34), and is irradiated onto the floor surface F below the toilet body 2, thereby brightly illuminating the space below the toilet body 2 and the floor surface F.
Furthermore, with regard to the translucent cover 40, which is fixed to the rear wall 2a of the toilet body 2 by the fixing part of the lighting device 14 (fixing part 30a of the housing 30), the exposed surface portion is made of a single member which is integrally formed without any gaps, thereby eliminating the risk of dirt getting into the gaps in the surface portion of the translucent cover 40.
Furthermore, even if dirt adheres to the surface portion of the translucent cover 40, since the translucent cover 40 is made of a single member that is integrally formed without any gaps, the surface portion can be easily wiped off, thereby improving cleaning performance.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, the fixing member (substrate member 34b) that fixes the light source (LED element 34a) of the light-emitting section (LED substrate 34) within the light-transmitting cover 40 is itself arranged to shield the upper part of the light source (LED element 34a) so that the light L emitted from the light source (LED element 34a) does not diffuse upward.
As a result, the substrate member 34b itself prevents the light L emitted from the light source (LED element 34a) of the light-emitting section (LED substrate 34) from diffusing upward, and the light that goes around the LED substrate 34 and leaks upward is blocked by the housing 30 itself, which is made of a light-blocking material, thereby reducing the occurrence of unnecessary reflected light and shadows, while ensuring that the light is diffused toward the floor surface F below the toilet body 2.

Furthermore, according to the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, an opening 30e is formed in the light-shielding section 30d of the housing 30 that is positioned below the light source (LED element 34a) of the light-emitting section (LED board 34) and that allows light L emitted from the light source (LED element 34a) to pass through in a translucent manner.
As a result, when light L emitted from the light source (LED element 34a) of the light-emitting unit (LED board 34) passes through the opening 30e of the light-shielding unit 30d of the housing 30 and is irradiated onto the floor surface F below the toilet body 2, the brightness of the light L passing through the opening 30e can be adjusted, and the directionality of the light L can be increased by passing the light L through the opening 30e of the light-shielding unit 30d.

Furthermore, with the lighting device 14 of the wall-hung flush toilet 1 of this embodiment, the auxiliary light-blocking member (main body-side water-stopping gasket 38) provided between the fixing member (housing 30) and the light-transmitting cover 40 can eliminate any gap in the front-to-rear direction between the housing 30 and the light-transmitting cover 40.
Therefore, it is possible to prevent light L emitted from the light source (LED element 34a) of the light-emitting portion (LED board 34) from being irradiated onto the floor surface F below the toilet body 2 from anywhere other than the opening 30e of the light-shielding portion 30d.

Furthermore, with the lighting device 14 of the wall-hung flush toilet 1 according to this embodiment, the surface on the irradiated side of its light-transmitting cover 40 (the lower surface 40a) is formed to be approximately flat.
This makes it possible to enhance the spot-like appearance of the light L concentrated in a specific area A of the floor surface F when the light L emitted from the light source (LED element 34a) of the light-emitting unit (LED board 34) passes through the irradiation side surface (lower surface 40a) of the translucent cover 40 and is irradiated onto the floor surface F below the toilet body 2.

In addition, the lighting device 14 of the wall-hung flush toilet 1 according to this embodiment makes it possible to provide a wall-hung flush toilet 1 equipped with a lighting device 14 that can brightly illuminate the space below the toilet body 2 and the floor surface F, while also improving cleaning performance.

In the above-described embodiment, the lighting device 14 of the wall-hung flush toilet 1 is described as being provided within the internal space S 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, the lighting device 14 is not limited to this form, and may be provided on the rear wall W side of the toilet body 2 or on the cabinet side, below the toilet body 2, so that it is not visible from the user of the toilet body 2.

LIST OF SYMBOLS 1 Wall-hung flush toilet 2 Toilet body 2a Rear end of toilet body, rear wall 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 16 Main water conduit 16a Inlet of main water conduit 18 Water supply pipe 20 Drain pipe 22 Tapping screw 24 Washer 26 Ceramic side water stop packing 28 Screw for fixing main body 30 Housing (fixing part of lighting device, fixing member)
30a: Fixing portion of the housing (fixing portion of the lighting device)
30b Support receiving portion of housing 30c Side wall of support receiving portion of housing 30d Light shielding portion of housing 30e Opening of light shielding portion of housing 32 Power supply harness 34 LED board (light emitting portion)
34a LED element (light source)
34b Base plate member (fixing member)
36 Board fixing screw 38 Main body side water stop packing (light shielding auxiliary member)
40: Light-transmitting cover 40a: Lower surface of the light-transmitting cover (surface on the irradiated side)
40b Rear side step portion in translucent cover A: Predetermined floor area to which light is irradiated, light irradiation area on the floor, light diffusion range F: Floor surface inside the toilet room and behind the wall G: Glaze L: Irradiated light L1: Light irradiated to the center of the irradiation area (diffusion range) L2: Light with maximum illuminance L3: Light irradiated to the frontmost side LG: Light gradation O1: Center of the floor irradiation area, center of the light diffusion range O2: Point to which light with maximum illuminance is irradiated within the light irradiation area (center of light)
S: Internal space of the toilet body S1: Wall surface forming the internal space of the toilet body T: Toilet room U: Fixed unit W: Wall

Claims (5)

A lighting device that illuminates a floor surface below a toilet bowl,
A fixing part that is fixed to a vertical surface of the toilet bowl or a cabinet behind the toilet bowl;
a light emitting unit that is attached to the fixed unit and includes a light source that emits light;
A light-transmitting cover formed of a light-transmitting material and covering the light-emitting unit;
The light emitting unit further includes a substrate member that fixes the light source within the light-transmitting cover, and the substrate member shields an upper side of the light source so that light emitted from the light source is not diffused upward .
The light-transmitting cover is attached to the fixing part so as to cover the light-emitting part from above, below, left, right, and front, which are directions other than the attachment side, when the lighting device is fixed to the toilet or the cabinet by the fixing part, and is characterized in that the exposed surface portion is made of a single member formed integrally without any gaps. 2. The lighting device according to claim 1 , further comprising a light-shielding portion disposed below said light source, said light-shielding portion having an opening formed therein through which light emitted from said light source can pass. 3. The lighting device according to claim 2 , further comprising an auxiliary light-shielding member provided between the fixing member and the light-transmitting cover. The lighting device according to claim 1, wherein the light-transmitting cover has a substantially flat surface on the irradiated side. A wall-hung flush toilet equipped with the lighting device according to any one of claims 1 to 4 .