Flush toilet

Abstract

To provide a flush toilet bowl that can achieve both miniaturization of a functional part and waterproof performance.SOLUTION: A flush toilet bowl 1 has a toilet bowl body 4 and a functional part 6 provided in the toilet bowl body. The functional part includes: a base 48 fixed to the toilet bowl body; an opening 54b including a waterproof area provided in the base; an actuation part 36 including an electrical part arranged at the base; operating parts 50, 52 enabling operation of the actuation part or operations other than the functional part; and an upper cover member 56 covering an upper part of the opening so that it can be opened and closed. The opening includes a peripheral wall part 54a provided to separate the operating parts and the electrical part 36. The peripheral wall part forms a waterproof area A1 provided apart from the periphery of the operating parts and allowing the operating parts to be arranged. The functional part includes a drainage opening 58 communicating with the outside of the functional part to allow drainage.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that is flushed with flush water to expel waste. [Background technology]

[0002] Conventionally, as a flush toilet that is flushed with flushing water to expel waste, there has been known a flush toilet known as a "full skirt type" or "full skirt type" in which a skirt section is formed outside the respective sides of the bowl section and the drain trap section of the ceramic toilet body, and which extends around the entire circumference of the toilet body, as described in Patent Documents 1 and 2, for example. In such conventional "full skirt type" or "full skirt type" flush toilets, a functional part is provided which includes the function of controlling the discharge and stopping of flush water into the bowl portion of the toilet body, and this functional part is stored in a storage area rearward of the bowl portion of the toilet body.

[0003] Furthermore, in the conventional flush toilet described in Patent Document 1 mentioned above, the functional unit is equipped with a power outage manual lever that enables the opening and closing of the water supply valve in the event of a power outage, and a cover member that covers the top of the entire functional unit including this manual lever. During a power outage, the water supply valve can be opened and closed manually by operating the power outage manual lever with the cover member covering the top of the functional unit removed, and the supply of flush water from the water source to the functional unit can be stopped or started on the toilet body side. Furthermore, in the conventional flush toilet described in Patent Document 1, when the upper part of the entire functional part is covered by a cover member, the area in which the functional part is stored becomes a waterproof area. However, if the functional part becomes wet when the cover member is removed, or if water enters through an opening in the functional part that is covered by the cover member, the water will pass through gaps and other parts that are not affected by the water entering and be discharged into the toilet body. Similarly, in the conventional flush toilet described in Patent Document 2 mentioned above, the functional part is equipped with a power outage response unit and a cover member that covers the top of the entire functional part, including this power outage response unit. In the event of a power outage, by operating the power outage response unit with the cover member covering the top of the functional part removed, it becomes possible to supply flush water to the bowl part of the toilet body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-169537 A [Patent Document 2] JP 2014-163186 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, the functional parts of conventional flush toilets are equipped with electrical components that are vulnerable to moisture and condensation, and therefore, when responding to a power outage, for example, if the cover member is removed and the top of the functional part is left open, there is a risk that the electrical components will become wet. Therefore, in order to reduce such risks, efforts have been made to create waterproof areas by providing waterproof walls in areas where the power outage control unit adjacent to electrical components is located and in the surrounding areas. However, even with such a waterproof area, if a large amount of water falls on the functional parts and causes water to accumulate in the waterproof area, there is a problem that the water within the waterproof area may subsequently leak out, causing water to fall on or flood electrical components. Furthermore, providing space to store such water until it evaporates or to allow it to escape also leads to an increase in the size of the entire functional part, which, contrary to the ability to slim down and downsize the functional part itself, also leads to an increase in the size of the entire functional part, which creates the problem that it also becomes difficult to slim down and downsize the storage space on the toilet body that houses the functional part. Therefore, a challenge that has been required is how to achieve both miniaturization of the functional parts and water resistance performance.

[0006] Therefore, the present invention has been made to solve the problems and desired issues of the prior art mentioned above, and has an object to provide a flush toilet that can achieve both the miniaturization of the functional parts and water damage prevention performance. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flushing water to discharge waste, comprising a toilet body with a bowl portion for receiving waste, and a functional portion provided on the toilet body, the functional portion comprising a base fixed to the toilet body, an opening including a waterproof area provided on the base, an operating portion including an electrical component disposed on the base, an operating portion that enables operation of the operating portion or operation of a portion other than the functional portion, and an upper cover member that covers the top of the opening in an openable and closable manner, the opening comprising a peripheral wall portion provided to isolate the operating portion and the electrical component, the peripheral wall portion being provided at a distance from the periphery of the operating portion to form the waterproof area in which the operating portion can be positioned, and the functional portion further comprising a water drainage opening that communicates with the outside of the functional portion to enable water drainage. In the present invention configured in this manner, an opening including a waterproof area is provided in the base of the functional part, and this opening has a peripheral wall portion that isolates the operating part and the electrical part of the actuation part, so that this peripheral wall portion makes it possible to provide a waterproof area in which the operating part can be placed. As a result, even if the operating part within the waterproof area becomes wet from above the opening while the upper cover member is open above this opening, the operating part within the waterproof area and the electrical part of the actuating unit are isolated from each other by the surrounding wall, thereby preventing the effect of water getting into the operating part beyond the waterproof area and onto the electrical part. In addition, even if water accumulates in the waterproof area of ​​the operating unit, the water can be reliably drained from the drain opening that communicates with the outside of the functional unit to the outside of the functional unit, so that the water in the operating unit is prevented from reaching the electrical unit beyond the waterproof area, and thus malfunctions caused by water in the electrical unit can be prevented. Furthermore, since there is no need for space in the surrounding area of ​​the opening of the base of the functional unit or in the upper cover member to store or release water until it evaporates, the functional unit can be made slimmer and more compact. As a result, it is possible to achieve both miniaturization of the functional part and water-resistant performance.

[0008] In the present invention, the water drain opening is preferably disposed in the peripheral wall portion provided in the waterproof area. In the present invention configured in this manner, the water drainage opening is located in the peripheral wall portion provided in the waterproof area of ​​the base of the functional part, so that even if water gets on the operating part and accumulates within the waterproof area, the water can be reliably drained to the outside of the functional part through the water drainage opening located in the peripheral wall portion. This reliably reduces the risk of water getting into the operating section beyond the waterproof area and reaching the electrical section.

[0009] In the present invention, it is preferable that the waterproof member further has a guide groove that is formed in a concave shape below the water drainage opening and is arranged to be able to guide water in the waterproof area from the water drainage opening to the outside of the functional portion. In the present invention configured in this manner, the guide groove formed in a concave shape below the water drainage opening ensures that water in the waterproof area where the operating part is submerged is drained through the water drainage opening, and then guided reliably to the outside of the functional part through the guide groove below the water drainage opening.

[0010] In the present invention, the water drain opening is preferably arranged on one of the left and right sides with respect to the center in the left-right direction of the toilet body so as to be spaced apart from the electrical equipment section. In the present invention configured in this manner, the drainage opening is disposed on one side of the left or right center of the toilet body in the left-right direction so as to be spaced apart from the electrical equipment, so that a relatively large distance can be secured between the drainage opening and the electrical equipment, thereby reliably preventing water drained from the drainage opening from getting onto the electrical equipment. In addition, since the drainage opening can be arranged in the limited space around the opening of the base of the functional part, it is possible to reduce the space required for storing water until it evaporates, for letting the water escape, etc. This makes it possible to slim down the area around the opening of the base of the functional part and to reduce the size of the entire functional part. Furthermore, water drained from the drain opening to the outside of the functional part can be reliably discharged to the outside of the toilet body or the functional part without interfering with the left-right centre of the toilet body.

[0011] In the present invention, the drainage opening is preferably provided in the base which forms the bottom surface of the waterproof area, and the drainage opening in the base is provided so as to cover the guide groove from above. In the present invention configured in this manner, the water drainage opening is provided to cover the guide groove from above, so that the water drainage opening can reliably guide the drained water into the guide groove without allowing it to flow back. Therefore, the water guided into the guide groove on the outside of the functional part can be reliably discharged to the inside or outside of the toilet body.

[0012] In the present invention, preferably, the toilet further comprises a rear cover member provided on the toilet body for covering the functional portion from the rear side, and the guide groove is provided in the rear cover member. In the present invention configured in this manner, water drained from the drain opening can be guided into the guide groove in the rear cover member, reliably drained outside the functional part, and then can be drained inside or outside the toilet body. In addition, water that has been discharged outside the functional part is easier to see when it is subsequently discharged outside the toilet body, making it possible to quickly respond to any water leakage from the functional part to the outside of the toilet body. Effect of the Invention

[0013] According to the flush toilet of the present invention, it is possible to achieve both miniaturization of the functional part and water damage prevention performance. [Brief description of the drawings]

[0014] [Figure 1] 1 is an overall configuration diagram of a flush toilet according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention. [Diagram 3] FIG. 1 is an exploded perspective view of a flush toilet according to an embodiment of the present invention, viewed from behind and diagonally above. [Figure 4] FIG. 2 is a rear view of a flush toilet according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a partially enlarged perspective view of the rear portion of a flush toilet according to one embodiment of the present invention, viewed diagonally from above. [Figure 6] FIG. 1 is a perspective view showing the internal structure of a flush water supply device for a flush toilet according to an embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 7 is a partially enlarged perspective view showing the vicinity of the water drain opening in the flush water supply device for the flush toilet according to one embodiment of the present invention shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A flush toilet according to one embodiment of the present invention will now be described with reference to the accompanying drawings. First, the overall structure of a flush toilet according to one embodiment of the present invention will be explained generally with reference to Figs. 1 to 3. Fig. 1 is a diagram showing the overall configuration of a flush toilet according to one embodiment of the present invention. Fig. 2 is a plan view of a flush toilet according to one embodiment of the present invention. Fig. 3 is an exploded perspective view of a flush toilet according to one embodiment of the present invention, seen from behind and diagonally above. Fig. 4 is also a rear view of a flush toilet according to one embodiment of the present invention. First, as shown in Figures 1 to 4, a flush toilet 1 according to one embodiment of the present invention comprises a water supply passage (main water supply passage 2) through which flush water supplied from a main water supply source W0 such as a water line passes, a ceramic toilet body 4, and a flush water supply device 6.

[0016] Next, as shown in Figures 1 to 3, the toilet body 4 comprises a bowl portion 8 for receiving waste, a rim portion 10 formed on the upper edge of the bowl portion 8, and a drain trap portion 12 extending from the bottom of the bowl portion 8. 1 to 4, the flush water supply device 6, details of which will be described later, is provided rearward of the bowl portion 8 of the toilet body 4, and is a functional part that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. More specifically, this functional part is powered by electricity, and includes the function of controlling the stop of the discharge of flush water into the bowl portion 8 of the toilet body 4.

[0017] Next, as shown in FIG. 2, a rim water channel 14 is formed inside the rim portion 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side). This rim water conduit 14 extends from the rear side of the toilet body 4 towards the front inside the rim section 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side), and then bends towards the rear halfway, forming a so-called U-turn shape. A rim spout 14a is provided at the downstream end of this rim water conduit 14 (the downstream rear end). Furthermore, the rim side water supply passage 2a of the flush water supply device 6, which will be described in detail later, is connected to the upstream side of the rim water conduit 14 of the toilet body 4. Flush water supplied to the rim water outlet 14a from this rim side water supply passage 2a is discharged rearward from the rim water outlet 14a into the bowl section 8, thereby performing rim spouting.

[0018] 1 and 2, a jet water conduit 16 is formed from the outer surface to the bottom of the bowl portion 8 of the toilet body 4. The downstream side of this jet water conduit 16 is directed toward the inlet portion 12a of the drain trap portion 12 at the bottom of the bowl portion 8, and a jet water outlet 16a is provided at the downstream end of the jet water conduit 16. Additionally, upstream of the jet water conduit 16 of the toilet body 4, there is provided a jet side water supply conduit 2b of the flush water supply device 6, which will be described in detail later. Flush water supplied from this jet side water supply conduit 2b to the jet water conduit 16 of the toilet body 4 is discharged from the jet water outlet 16a towards the inlet 12a of the drain trap section 12, so that jet water is discharged. Here, as shown in FIG. 1, the upstream side of the rim-side water supply passage 2a of the flush water supply device 6 is connected to a changeover valve 18 at the branch point B of the main water supply passage 2. On the other hand, as shown in FIG. 1, the upstream side of the jet side water supply passage 2b of the wash water supply device 6 is connected to a pressure pump 22 of the wash water supply device 6 provided downstream of the water storage tank 20 of the wash water supply device 6.

[0019] Next, the drain trap section 12 of the toilet body 4 consists of an inlet section 12a provided at the bottom of the bowl section 8, an ascending pipe 12b rising from this inlet section 12a, and a descending pipe 12c descending from this ascending pipe 12b, with the top section 12d being between the ascending pipe 12b and the descending pipe 12c. As shown in FIG. 1, the outlet portion 12e of the downcomer pipe 12c of the drain trap portion 12 is connected to the inlet portion of a drain socket S disposed at the rear and below of the toilet body 4. 1, the outlet on the rear side of the drain socket S is connected to the inlet of a drain pipe D extending from the rear wall (not shown) of the toilet body 4. This allows the drainage water discharged from the outlet 12e of the drain trap part 12 of the toilet body 4 to be discharged from the drain socket S into the drain pipe below the installation surface (floor surface F) of the bottom of the toilet body 4, resulting in a so-called "floor-side drainage" drainage form. Furthermore, the flush toilet 1 of this embodiment is not limited to this type of "floor-side drainage" drainage configuration, but can also be applied to a so-called "wall-side drainage" drainage configuration in which wastewater discharged from the outlet portion 12e of the drain trap portion 12 of the toilet body 4 is discharged from the drain socket S to the wall-side drain pipe D.

[0020] Next, each component of the flush water supply device 6 of the flush toilet 1 according to the present embodiment will be explained generally with reference to FIG. First, as shown in FIG. 1, the flush water supply device 6 is provided with, from the upstream side to the downstream side of the main water supply passage 2, a stop valve 24, a branch fitting 26, a valve unit 28, and a switching valve 18. Next, the valve unit 28 includes a constant flow valve 30, a diaphragm type main valve 32, and an electromagnetic valve 34 such as a solenoid valve. The cleaning water supply device 6 also includes a controller 36. The controller 36 is capable of functioning as a control unit that controls the opening and closing operation of the on-off valve (solenoid valve 34) of the valve unit 28, the switching operation of the switching valve 18, and the rotation speed and operating time of the pressure pump 22.

[0021] Furthermore, the constant flow valve 30 of the valve unit 28 is for restricting the flush water that has passed from the stop valve 24 in the main water supply passage 2 through the branch fitting 26 to a predetermined flow rate or less. Incidentally, in the case where a genital sanitary washing device (not shown) is provided for the flush toilet 1, the branch fitting 26 can also be connected to a water supply pipe (not shown) for supplying washing water to the genital sanitary washing device (not shown). Furthermore, in the valve unit 28, when the solenoid valve 34 is opened under the control of the controller 36, the main valve 32 opens, and the flushing water that has passed through the main valve 32 from the constant flow valve 30 is supplied to the switching valve 18 at the branch B downstream of the main water supply line 2. Here, the switching valve 18 is capable of supplying flushing water from the main water supply passage 2 to both the rim side water supply passage 2a and the tank side water supply passage 2c at the same time, making it possible to arbitrarily change the ratio of the amount of water supplied to the rim side and the tank side.

[0022] Next, the flush water supply device 6 is equipped with a tank device T that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. This tank device T is equipped with a water storage tank 20 that is connected to the rear of the toilet body 4 and stores the flush water supplied from the main water supply passage 2, and a pump (pressurizing pump 22) that pressure-feeds the flush water in this water storage tank 20 to the toilet body 4. Furthermore, downstream of the branch B on the downstream side of the main water supply passage 2, there are provided a rim side water supply passage 2a that communicates with the rim water passage 14 of the toilet body 4, and a tank side water supply passage 2c that is connected to the water storage tank 20. As a result, the flush water supplied from the main water supply source W0 to the branch B of the main water supply passage 2 is used as at least one of the rim water supply to the rim side water supply passage 2a and the tank water supply to the tank side water supply passage 2c.

[0023] Furthermore, the wash water supply device 6 is provided with a pump water supply passage 2d that extends from the downstream side of the tank side water supply passage 2c to the pressure pump 22, and a jet side water supply passage 2b that extends from the pressure pump 22 to the downstream side. As a result, in the flush toilet 1 of this embodiment, flush water directly pressurized by the water supply is supplied from the main water supply passage 2 and is supplied from the rim side water supply passage 2a of the flush water supply device 6 through the rim water conduit 14 of the toilet body 4 to the rim water outlet 14a, making it possible for water to be discharged from the rim water outlet 14a (so-called "rim water discharge"). Furthermore, the flush water supplied from the main water supply passage 2 to the flush water supply device 6 passes through the tank side water supply passage 2c, the water storage tank 20, the pump water supply passage 2d and the pressure pump 22 of the flush water supply device 6, and is then supplied from the jet side water supply passage 2b through the jet water conduit 16 of the toilet body 4 to the jet water outlet 16a, making it possible for water to be discharged from the jet water outlet 16a (so-called ``jet water discharge''). In other words, the flush toilet 1 of this embodiment is capable of using both rim spouting of flush water directly pressurized from the main water supply line 2, and jet spouting of flush water pressurized by the pressure pump 22 from the water storage tank 20, and is designed to function as a so-called hybrid flush toilet 1.

[0024] Next, an upper float switch 38 and a lower float switch 40 are respectively disposed inside the water storage tank 20. The water level inside the water storage tank 20 can be detected by these float switches 38, 40. For example, the upper float switch 38 switches on when the water level in the water tank 20 reaches a predetermined water level, and the controller 36 detects the on state of the upper float switch 38 and closes the solenoid valve 34. On the other hand, the lower float switch 40 switches on when the water level in the water tank 20 drops to a predetermined water level that is lower than the predetermined stored water level detected by the upper float switch 38, and the controller 36 detects the on state of the lower float switch 40 and stops the pressure pump 22. In addition, the pressure pump 22 draws flush water stored in the water storage tank 20 into the pump water supply passage 2d, and pressurizes the flush water from this pump water supply passage 2d into the jet side water supply passage 2b, thereby discharging it from the jet water outlet 16a.

[0025] With this structure, during normal toilet flushing, the controller 36 detects the operation of the toilet flush switch (not shown) by the user, and sequentially activates the solenoid valve 34, the switching valve 18, and the pressure pump 22. This causes water to begin to be discharged sequentially from the rim water outlet 14a and the jet water outlet 16a, and the cleaning water that has cleaned the inside of the bowl portion 8 is discharged from the drain trap portion 12 together with the waste in the bowl portion 8. Furthermore, after flushing is completed, the controller 36 opens the solenoid valve 34, the switching valve 18 is switched to the tank side water supply passage 2c side, and flush water in the main water supply passage 2 is replenished to the water storage tank 20. When the water level in the water tank 20 rises and the upper float switch 38 detects the specified water level, the controller 36 closes the solenoid valve 34, causing the main valve 32 to close the main water supply line 2 and stopping the water supply. Furthermore, each of these devices of the flush water supply device 6 (functional section) is adapted to be stored in a rear functional storage section V0 in the area rearward of the bowl section 8 of the toilet body 4.

[0026] The flush water supply device 6 also includes an operating device U1 for stopping water supply during power outages, which enables the water supply to the toilet body 4 to be stopped by manual operation during a power outage, and an operating device U2 for drainage during power outages, which enables the internal flow path S1 of the drain socket S to be opened and closed by manual operation. The specific structures of these operating devices U1, U2 during a power outage will be described later.

[0027] Next, as shown in Figs. 2 to 4, the toilet body 4 is provided with a skirt portion 42 formed outside the respective side surfaces of the bowl portion 8 and the drain trap portion 12. In addition, the rear functional storage section V0 of the toilet body 4 is located below the upper ends of the rear wall section 42a and the side wall section 42b of the skirt section 42 in the area rearward of the bowl section 8 of the toilet body 4, and inside the rear wall section 42a and the side wall section 42b of the skirt section 42. As a result, the rear functional storage section V0 of the toilet body 4 forms a storage area that can store at least a portion of the flush water supply device 6 (functional section).

[0028] Next, as shown in FIGS. 3 and 4, the flush toilet 1 of this embodiment is equipped with a cover member 44 that covers the rear and bottom sides of the flush water dispenser 6. When the flush water supplying device 6 is stored within the rear function storage section V0 of the toilet body 4, first, only the cover member 44 alone is fixed and attached to the rear function storage section V0 of the toilet body 4. Then, by attaching the flush water supplying device 6 to the cover member 44 which is fixed to the toilet body 4 in this way, the flush water supplying device 6 is held by the cover member 44, and is also fixed to the rear function storage section V0 of the toilet body 4 via this cover member 44. In addition, the cover member 44 covers the rear and bottom sides of the flushing water supply device 6, and also functions as a rear cover member that closes the opening cross-section 46a of the upper opening 46 provided on the rear side (rear wall portion 42a) of the toilet body 4.

[0029] Next, with reference to Figs. 1 and 3 to 8, the specific structures of the power failure water supply cut-off operating device U1 and power failure water drain operating device U2 in the flush water supply device 6 (functional part), as well as their surrounding parts, will be described. Fig. 5 is a partially enlarged perspective view of the rear part of a flush toilet according to one embodiment of the present invention, seen from diagonally above. Next, Fig. 6 is a perspective view showing the internal structure of a flush water supply device for a flush toilet according to one embodiment of the present invention. Also, Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6. First, as shown in FIG. 1 and FIGS. 5 to 7, the flush water supply device 6 is equipped with a thin plate-like base portion (base member 48) fixed to the upper outside of the water storage tank 20. In addition, on the base member 48, an operating section (controller 36, etc.) including an electrical section such as electric components is arranged. Furthermore, an operating section storage chamber 54 is provided on the base member 48 to enable placement of the operating sections (valve operating ring 50, flapper operating ring 52) of the power failure water supply cut-off operating device U1 and the power failure water drainage operating device U2.

[0030] 5 to 7, the operation part storage chamber 54 has a peripheral wall 54a extending upward from a bottom surface 54c formed so as to surround the side of the operation part storage chamber 54. The peripheral wall 54a is provided so as to separate the operation parts (valve operation ring 50, flapper operation ring 52) from the operating part (controller 36, etc.). Furthermore, the peripheral wall 54a of the operation unit storage chamber 54 is provided with an upper opening 54b that is open at its upper and rear ends. The flush water supply device 6 also includes an upper cover member 56 that covers at least the top of the upper opening 54b. This upper cover member 56 is provided so as to be removable from at least the upper opening 54b. For example, by removing the upper cover member 56 during a power outage, the upper and rear sides of the operation unit storage chamber 54 are opened, allowing the user to access the respective operation units (valve operation ring 50, flapper operation ring 52) of the power outage water supply stop operation device U1 and the power outage water drain operation device U2. In addition, inner cover members 56a are provided inside the upper cover member 56 and on both the left and right sides of the operation unit storage chamber 54, and the inner cover members 57 cover the upper parts of the spaces partitioned on both the left and right sides of the operation unit storage chamber 54. That is, for example, even when the upper cover member 56 is removed during a power outage, only the upper opening 54b of the operation unit storage chamber 54 is open, and the rest of the area other than the upper opening 54b is covered by the inner cover member 57. Furthermore, even if the operation unit storage chamber 54 is accidentally flooded with water while the upper opening 54b is open, the water inside the operation unit storage chamber 54 is blocked by the peripheral wall portion 54a, so that water does not leak into the operating parts (controller 36, etc.) located outside the operation unit storage chamber 54. That is, the inner area of ​​the operation unit storage chamber 54 is formed by the peripheral wall portion 54a and serves as the waterproof area A1. This waterproof area A1 is partitioned by the peripheral wall portion 54a from the outer area A2 in which the operating unit (controller 36, etc.) is disposed, and the two are isolated from each other. In addition, the peripheral wall portion 54a may be structured to extend upward so as to fit with the inner cover member 57, or a wall member (not shown) extending downward may be provided on the inner cover member 57, and this wall member (not shown) may be offset relative to the peripheral wall portion 54a to isolate the operating unit storage chamber 54. Furthermore, instead of providing a peripheral wall portion 54a on the bottom surface 54c of the operation unit storage chamber 54, a wall member (not shown) extending downwardly may be provided on the inner cover member 57, and the wall member (not shown) may be fitted into the bottom surface 54c to isolate the operation unit storage chamber 54. It is not necessary for the peripheral wall portion 54a to completely separate the outer area A2, and the height of the peripheral wall portion 54a may be set within the range of the drainage capacity of a drainage opening 58, which will be described later.

[0031] Next, as shown in Figures 5 to 7, a main hole 58a, an auxiliary hole 58b, and a water drainage hole 58c of the water drainage opening 58 are provided on the base end surface (bottom surface 54c of the operation unit storage chamber 54) and the rear end surface of the rear side peripheral wall portion 54a of the operation unit storage chamber 54. 6. FIG. 8 is a partially enlarged perspective view showing the vicinity of the water drain opening in the flush water supply device for the flush toilet according to the embodiment of the present invention shown in FIG. 7 and 8, the main hole 58a and auxiliary hole 58b of the water drain opening 58 are formed so as to penetrate vertically through the bottom surface 54c of the operation unit storage chamber 54, and the water drain hole 58c of the water drain opening 58 is formed so as to penetrate front-to-rear through the rear end wall of the peripheral wall portion 54a, with the holes 58a, 58b, 58c communicating with the outside of the flush water supply device 6. As a result, water that has accumulated in the waterproof area A1 is allowed to be discharged from the water drain opening 58 (main hole 58a, auxiliary hole 58b, water drain hole 58c) to the outside of the toilet body 4 or the flush water supply device 6 as drained water w1. Also, as shown in Figure 6, the drainage opening 58 (main hole 58a, auxiliary hole 58b, drainage hole 58c) is located on one side (to the left of the central axis C1 when looking at the toilet body 4 from the rear side) of the left-right central axis C1 (see Figures 2 and 6) of the toilet body 4. As a result, the drainage opening 58 (main hole 58a, auxiliary hole 58b, drainage hole 58c) is spaced away from the electrical equipment (controller 36, etc.) located on the other left or right side of the left-right central axis C1 of the toilet body 4 (to the right of the central axis C1 when viewed from the rear), ensuring a relatively large distance between the drainage opening 58 and the electrical equipment (controller 36, etc.). As a result, the operating parts (valve operating ring 50, flapper operating ring 52) are easily accessible from the left or right of the flush toilet 1.

[0032] Next, as shown in FIGS. 5 and 6, the power outage water supply cutoff operating device U1 includes a fixed tube 60, an operating wire 62, and a valve operating ring 50. First, one end of the fixed tube 60 is fixed to a part of the valve unit 28 , and the other end is fixed to a part of the peripheral wall 54 a of the operation portion storage chamber 54 . Next, the operation wire 62 is provided so as to be capable of being inserted into the fixed tube 60. One end of the operation wire 62 on the valve unit 28 side is connected to a part of a mechanism (not shown) that enables the diaphragm-type main valve 32 to be opened and closed, and the other end of the operation wire 62 is connected to the valve operation ring 50. Also, as shown in Figures 6 to 8, during normal use, the flapper operating ring 52 of the power outage drainage operating device U2 is removably attached to the pillar portion 54d extending in the vertical direction within the operating unit storage chamber 54, with the upper portion of the pillar portion 54d inserted therein. On the other hand, the valve operating ring 50 of the power outage water supply cutoff operating device U1 is inserted into and attached to a flapper operating ring 52 which is removably attached to a column portion 54d extending vertically within the operating unit storage chamber 54. As a result, the valve operating ring 50 of the power outage water supply cut-off operating device U1 and a portion of the operating wire 62 on the valve operating ring 50 side are arranged within the waterproof area A1 of the operating unit storage chamber 54.

[0033] For example, when operating the power outage water supply cutoff operating device U1 during a power outage, the upper cover member 56 is first removed to open the upper opening 54b of the operating unit storage chamber 54. Then, by manually pulling the valve operating ring 50 to raise the operating wire 62 to a predetermined length, the operating wire 62 is returned to its original position, whereupon the main valve 32 opens via an opening / closing mechanism (not shown), and water supply by the valve unit 28 is manually performed. Thereafter, the valve operating ring 50 is manually pulled again to pull the operating wire 62 up a predetermined length, and then the operating wire 62 is returned to its original position, whereupon the main valve 32 closes via an opening / closing mechanism (not shown), and the water is manually stopped by the valve unit 28.

[0034] Next, as shown in FIGS. 5 to 8, the drainage operating device U2 during a power failure includes a fixed tube 64, an operating wire 66, a holder 68, a flapper device 70, and a flapper operating ring 52. 1, the flapper device 70 includes a flapper valve 70a that is openably and closably provided in the internal flow path S1 of the drain socket S. During normal use, the flapper valve 70a keeps the internal flow path S1 of the drain socket S open. Moreover, one end of the fixed tube 64 is fixed to a part of the flapper device 70 , while the other end is fixed to the holder 68 .

[0035] Next, as shown in Figures 7 and 8, the retainer 68 is a generally cylindrical member and includes a generally cylindrical main shaft portion 68a, a flange portion 68b provided in an annular shape on the outer periphery of this main shaft portion 68a, and a protrusion 68c protruding outward from this flange portion 68b. In addition, the retainer 68 is held in a state in which its main shaft portion 68a is inserted into the main hole 58a of the drainage opening 58 of the base member 48, and the flange portion 68b is coaxially fitted into the main hole 58a of the drainage opening 58. A gap may be provided to allow water to drain from the fitting portion between the flange portion 68b and the main hole 58a into the guide groove 72. The holder 68 is inserted from below the main hole 58a, and the main hole 58a forms an annular groove around the main shaft portion 68a that is lower than the bottom surface 54c. Water w1 in the operating unit storage chamber 54 is either drained directly into the guide groove 72 from the drain hole 58c, or is guided from the main hole 58a to the auxiliary hole 58b by the above-mentioned annular groove formed by the main hole 58a and the retainer 68, and is then drained into the guide groove 72. Furthermore, the locking projection 68c of the holder 68 projects rearward from the rear end of the flange portion 68b and is held in contact with the lower end side of the auxiliary hole 58b of the water drainage opening 58. Here, in each of the fitting portions between the main shaft portion 68a and flange portion 68b of the holder 68 and the main hole 58a of the drainage opening 58, and the abutting portion between the locking projection 68c of the holder 68 and the auxiliary hole 58b of the drainage opening 58, there are gaps formed that are large enough to allow water in the waterproof area A1 to be drained from each of the main hole 58a and auxiliary hole 58b of the drainage opening 58 to the outside of the toilet body 4 or the flush water supply device 6. However, such gaps may be omitted, since at least the drainage hole 58c functions as the main drainage hole.

[0036] Next, the operation wire 66 is provided so as to be capable of being inserted into the fixed tube 64. One end of the operation wire 66 on the flapper device 70 side is connected to a part of a mechanism (not shown) that enables the flapper device 70 to be opened and closed, and the other end of the operation wire 66 is connected to the flapper operation ring 52 via a connecting loop 52a. During normal use, the flapper operation ring 52 of the drainage operating device U2 during power outage is removably attached to the column 54d in the operating part storage room 54. As a result, the flapper operation ring 52 of the drainage operating device U2 during power outage, a part of the operating wire 66 on the flapper operation ring 52 side, and a part of the upper side of the holder 68 are disposed in the waterproof area A1 of the operating part storage room 54.

[0037] For example, when operating the drainage operating device U2 during a power outage, first, the upper cover member 56 is removed to open the upper opening 54b of the operating portion storage chamber 54. Furthermore, under normal circumstances, the flapper valve 70a of the flapper device 70 is in an open state, so that by manually pulling the flapper operating ring 52 to pull up the operating wire 66 by a predetermined length and then returning the operating wire 66 to its original position, the flapper valve 70a can be closed via an opening / closing mechanism (not shown). After that, the flapper operating ring 52 is manually pulled again to pull the operating wire 66 up a predetermined length, and then the operating wire 66 is returned to its original position. This causes the flapper valve 70a to open via an opening / closing mechanism (not shown), opening the internal flow path S1 in the drain socket S, and making it possible to drain water from the drain trap portion 12 of the toilet body 4 through the drain socket S to the drain pipe D. In addition, under normal circumstances, the flapper valve 70a of the flapper device 70 is in an open state, so that the flapper valve 70a may be able to be closed via an opening / closing mechanism (not shown) while the operating wire 66 is pulled up a predetermined length by manually pulling the flapper operating ring 52. Furthermore, when the operating wire 66 is returned to its original position again (the operation of manually pulling the flapper operating ring 52 to pull up the operating wire 66 a predetermined length is ended), the flapper valve 70a opens via an opening / closing mechanism (not shown), the internal flow path S1 in the drain socket S is opened, and water can be drained from the drain trap portion 12 of the toilet body 4 through the drain socket S to the drain pipe D.

[0038] Next, as shown in Figs. 4 to 8, below the drain opening 58 and on the rear side of the cover member 44, a guide groove 72 is formed in a concave shape and extending in the vertical direction. Also, as shown in Figures 7 and 8, the rear end portions of the peripheral wall portion 54a and bottom surface 54c of the operating unit storage chamber 54, which form the water drainage opening 58, protrude rearward so as to cover the upper end opening 72a of the guide groove 72 from above. This allows the lower portion of the water drain opening 58 (main hole 58a, auxiliary hole 58b) to vertically communicate with the guide groove 72. In other words, the holder 68 is provided inside the guide groove 72. Furthermore, as shown in Figure 8, the length of the guide groove 72 in the left-right width direction is set to be greater than the length of the retainer 68 in the left-right width direction, and less than the length of the upper opening 54b in the left-right width direction. This makes it possible to reduce the effect that the guide groove 72 has on the overall aesthetic appearance of the flush toilet 1, whether or not there is a power outage. Incidentally, the guide groove 72 may be concealed by providing a cover member (not shown) from the outside of the guide groove 72 in order to suppress the influence on the aesthetic appearance.

[0039] Furthermore, as shown in Figures 4 and 5, the guide groove 72 is provided up to the lower end of the rear cover member 44, making it possible to guide any water that gets in below the toilet body 4 of the flush toilet 1. 3 to 5, an opening (lower end opening 72b) is provided at the lower end of the guide groove 72, and a gap is provided between a lower portion of the front wall surface 72c of the guide groove 72 of the cover member 44 that extends downward beyond the lower end opening 72b, and the inner wall surface of the rear function storage section V0 of the toilet body 4 that faces this lower portion. This gap makes it possible for the water w1 that falls in to be guided from the guide groove 72 into the inside of the rear function storage section V0 of the toilet body 4. 4 and 7, the guide groove 72 has a front wall surface 72c that slopes forward (towards the toilet body 4 of the flush toilet 1) from above to below. This makes it easier to guide water that gets into the control unit storage chamber 54 from the guide groove 72 into the interior of the rear function storage section V0 of the toilet body 4 of the flush toilet 1. 4 and 5, the left and right side wall surfaces 72d of the guide groove 72 are tapered so that the length in the left and right width direction increases from the top to the bottom. This allows the water that falls through the guide groove 72 to be guided downward without stagnating in the guide groove 72, and makes it possible to suppress splashing of the water that falls. Furthermore, by extending the lower end opening 72b of the guide groove 72 to the part that contacts the outside of the toilet body 4 of the flush toilet 1 and eliminating the gap between the rear cover member 44 and the toilet body 4 of the flush toilet 1, water that falls in can be guided from the guide groove 72 to the outside of the toilet body 4, without being guided into the interior of the rear function storage section V0 of the toilet body 4.

[0040] Next, an example of manual operation of the power failure water supply cutoff operating device U1 and the power failure water drain operating device U2 during a power failure will be described with reference to Figs. 1 and 5 to 8. First, the upper cover member 56 is removed to open the upper opening 54b of the operation portion storage chamber 54. Then, by manually pulling the valve operating ring 50 to pull up the operating wire 62 a predetermined length, the operating wire 62 is returned to its original position, whereupon the main valve 32 opens via an opening / closing mechanism (not shown), and the water supply operation by the valve unit 28 is manually performed. This causes water to start spouting (rim spouting) from the main water supply passage 2 through the rim side water supply passage 2a and from the rim spouting outlet 14a of the toilet body 4 into the bowl portion 8.

[0041] Next, the flapper operating ring 52 of the power outage drainage operating device U2 is manually pulled to pull up the operating wire 66 a predetermined length, and then the operating wire 66 is returned to its original position, causing the flapper valve 70a to close via an opening / closing mechanism (not shown). This causes water to start accumulating in the bowl portion 8 of the toilet body 4, and water sealing also starts in the internal flow path S1 of the drain socket S upstream of the flapper valve 70a and in the drain trap portion 12 of the toilet body 4.

[0042] Next, when the water level in the bowl portion 8 of the toilet body 4 rises to a predetermined level that does not overflow and allows the toilet to be flushed, i.e., a water level that generates a siphon effect in the drain trap portion 12, the flapper operation ring 52 of the power failure drain operation device U2 is manually pulled again to pull up the operation wire 66 a predetermined length. After that, when the operation wire 66 is returned to its original position again, the flapper valve 70a opens via the opening and closing mechanism (not shown). This opens the internal flow path S1 in the drain socket S, causing a siphon action in the drain trap portion 12 of the toilet body 4, and causing the flushing water in the bowl portion 8 to drain from the drain trap portion 12 through the drain socket S into the drain pipe D. Then, the valve operating ring 50 is manually pulled to pull the operating wire 62 up by a predetermined length, and the operating wire 62 is then returned to its original position. This causes the main valve 32 to close via an opening / closing mechanism (not shown), and the water stopping operation is manually performed by the valve unit 28, stopping water discharge (rim discharge) from the main water supply passage 2 through the rim side water supply passage 2a to the rim water outlet 14a of the toilet body 4 into the bowl portion 8. As a result, a series of water supply and drainage operations related to toilet flushing during a power outage are completed.

[0043] Next, the operation of the flush toilet 1 according to the embodiment of the present invention described above will be explained with reference to Figs. 1 to 14. First, according to the flush toilet 1 according to one embodiment of the present invention, an opening 54b including a waterproof area A1 is provided in the base (base member 48) of the functional part (flush water supply device 6). Additionally, this opening 54b is equipped with a peripheral wall portion 54a which separates the operating part (valve operating ring 50, flapper operating ring 52) from the electrical parts (not shown) of the actuating part (controller 36, etc.). As a result, a waterproof area A1 in which the operating parts (valve operating ring 50, flapper operating ring 52) can be arranged can be provided in base member 48 of flush water supply device 6. As a result, even if the waterproof area A1 or the operating parts therein (valve operating ring 50, flapper operating ring 52) are wetted from above the opening 54b with the upper cover member 56 open, the operating parts (valve operating ring 50, flapper operating ring 52) in the waterproof area A1 and the electrical parts of the actuating part (controller 36, etc.) are isolated from each other by the peripheral wall 54a. This makes it possible to suppress the effect of water getting into the waterproof area A1 or the operating parts therein (valve operating ring 50, flapper operating ring 52) from exceeding the waterproof area A1 and exerting an influence on the electrical parts (controller 36, etc.) in the outer area A2. Furthermore, even if water damage w1 to the operating parts 50, 52 accumulates within the waterproof area A1, the water can be reliably drained to the outside of the cleaning water supplying device 6 through the water drain openings 58 (main hole 58a, auxiliary hole 58b, water drain hole 58c) that communicate with the outside of the cleaning water supplying device 6, so it is possible to prevent the water damage w1 to the operating parts 50, 52 from reaching the electrical parts (controller 36, etc.) beyond the waterproof area A1. This makes it possible to prevent malfunctions caused by water damage to the electrical parts (controller 36, etc.). Furthermore, since there is no need for space in the surrounding area of ​​the opening 54b of the base member 48 of the cleaning water supplying device 6 or in the upper cover member 56 to store the water that has been splashed on the device until it evaporates or to allow the water to escape, the cleaning water supplying device 6 can be made slimmer and more compact. As a result, it is possible to achieve both miniaturization of the wash water supply device 6 and water damage prevention performance.

[0044] Furthermore, according to the flush toilet 1 of this embodiment, the water drainage openings 58 (main hole 58a, auxiliary hole 58b, water drainage holes 58c) are arranged on the base end surface (bottom surface 54c of the operation unit storage chamber 54) and rear end surface of the peripheral wall portion 54a, which is provided in the waterproof area A1 of the base member 48 of the flush water supply device 6. As a result, even if water gets on the operation units 50, 52 and accumulates within the waterproof area A1, water can be reliably drained to the outside of the toilet body 4 and the flush water supply device 6 from the water drainage openings 58 (main hole 58a, auxiliary hole 58b, water drainage holes 58c) arranged on the base end surface (bottom surface 54c of the operation unit storage chamber 54) and rear end surface of the peripheral wall portion 54a. Therefore, it is possible to reliably reduce the risk that the water damage w1 of the operation units 50, 52 will extend beyond the waterproof area A1 and reach the electrical equipment unit (the controller 36, etc.).

[0045] Furthermore, according to the flush toilet 1 of this embodiment, a concave guide groove 72 is provided below the drainage opening 58 (main hole 58a, auxiliary hole 58b, drain hole 58c), so that after the water w1 within the waterproof area A1 where the operating parts 50, 52 are submerged is drained from the drainage opening 58 (main hole 58a, auxiliary hole 58b, drain hole 58c), it can be reliably guided to the outside of the flush water supply device 6 from the guide groove 72 below the drainage opening 58 (main hole 58a, auxiliary hole 58b, drain hole 58c).

[0046] Furthermore, according to the flush toilet 1 of this embodiment, the drainage opening 58 (main hole 58a, auxiliary hole 58b, drainage hole 58c) is positioned to the left or right of the left-right central axis C1 of the toilet body 4 (to the left of the central axis C1 when looking at the toilet body 4 from the rear side) so as to be spaced away from the electrical components (controller 36, etc.). This allows a relatively large distance to be secured between the water drain opening 58 (main hole 58a, auxiliary hole 58b, water drain hole 58c) and the electrical equipment (controller 36, etc.), thereby reliably preventing the water w1 drained from the water drain opening 58 (main hole 58a, auxiliary hole 58b, water drain hole 58c) from getting onto the electrical equipment (controller 36, etc.). Also, because the water drain openings 58 (main hole 58a, auxiliary hole 58b, water drain holes 58c) can be arranged in the limited space around the opening 54b of the base member 48 of the wash water supplying device 6, it is possible to reduce the space required for storing water until it evaporates and for letting the water escape. This makes it possible to slim down the area around the opening 54b of the base member 48 of the wash water supplying device 6 and to reduce the size of the entire wash water supplying device 6. Furthermore, the water w1 drained from the drain openings 58 (main hole 58a, auxiliary hole 58b, drain hole 58c) to the outside of the flushing water supply device 6 can be reliably discharged to the outside of the toilet body 4 or the flushing water supply device 6 without interfering with the left-right central axis C1 of the toilet body 4.

[0047] Furthermore, according to the flush toilet 1 of this embodiment, the water-drainage openings 58 (main hole 58a, auxiliary hole 58b, water-drain holes 58c) are arranged to cover the upper end opening 72a of the guide groove 72 from above, and therefore the water-drainage openings 58 (main hole 58a, auxiliary hole 58b, water-drain holes 58c) can reliably guide the drained water w1 into the guide groove 72 without allowing it to flow back. Therefore, the water w1 guided to the guide groove 72 outside the wash water supplying device 6 can be reliably discharged to the outside of the wash water supplying device 6.

[0048] Furthermore, with the flush toilet 1 of this embodiment, the water w1 drained from the drainage openings 58 (main hole 58a, auxiliary hole 58b, drainage hole 58c) can be guided into the guide groove 72 in the rear cover member 44, and after being reliably discharged outside the flush water supply device 6, it can be discharged inside or outside the toilet body 4. Furthermore, the water w1 discharged outside the flush water supply device 6 is easily visible when it is subsequently discharged outside the toilet body 4, making it possible to quickly deal with any leakage of water from the flush water supply device 6 to the outside of the toilet body 4.

[0049] In the flush toilet 1 according to one embodiment of the present invention described above, as an example of an operating part that is arranged within the waterproof area A1 of the base (base member 48) of the flush water supply device 6, a form of an operating part for responding to power outages that employs a valve operating ring 50 of the operating device U1 for stopping the water supply during power outages and a flapper operating ring 52 of the operating device U2 for draining water during power outages has been described; however, the present invention is not limited to such forms and can also be applied to other forms that employ operating parts other than an operating part for responding to power outages or operating parts that perform operations other than those of a functional part (flush water supply device 6). For example, as another form of operation unit that employs an operation unit other than an operation unit for responding to power outages, an operation unit for performing operations related to a local cleaning device (not shown) other than the functional unit (cleaning water supply device 6) may be applied. Alternatively, as another form of operating unit that employs an operating unit that performs operations other than the functional unit (flush water supply device 6), an operating unit for operating such a heater device (not shown) in a flush toilet that is provided with a heater device or the like for cold climate specifications may be applied. [Explanation of symbols]

[0050] 1. Flush toilet according to one embodiment of the present invention (hybrid flush toilet) 2 Main water supply channel 2a Rim side water supply channel 2b Jet side water supply line 2c Tank side water supply channel 2d Pump supply line 4. Toilet body 6 Cleaning water supply device (functional part) 8 Bowl section 10 Rim section 12 Drain trap section 12a Inlet of drain trap 12b Drain trap riser 12c Downcomer pipe of drain trap 12d Top of drain trap 12e Outlet of drain trap 14 Rim Waterway 14a Rim Spout 16 Jet Waterway 16a Jet outlet 18 Switching valve 20 Water Tank 22 Pressure pump 24 Stopcock 26 Branch fitting 26a Power failure switching valve 28 Valve unit 30 Constant flow valve 32 Diaphragm type main valve 34 Solenoid valve 36 Controller (operating part, electrical part) 38 Upper float switch 40 Lower float switch 42 Skirt Club 42a Rear wall of skirt 42b Side wall of skirt 44 Cover member (rear cover member) 46 Upper opening of toilet body 46a Opening cross section 48 Base material (base) 50 Valve operation ring (operation part) 52 Flapper operation ring (operation part) 52a Connecting Loop 54 Control room (waterproof area) 54a Surrounding wall of the operation unit storage room 54b Upper opening of the operation unit storage room (opening of the function unit) 54c Bottom of the control compartment 54d Pillar in the control unit storage compartment 56 Upper cover member 57 Inner cover member 58 Water drain opening 58a Main hole 58b Auxiliary hole 58c Drain hole 60 Fixed Tube 62 Control wire 64 Fixed Tube 66 Control wire 68 Holder 68a Main shaft part 68b Flange part 68c Locking protrusion 70 Flapper device 70a Flapper valve 72 Guide groove 72a Top opening 72b Bottom opening 72c Front wall of the guide groove 72d Left and right side walls of the guide groove A1 Waterproof area A2 outer area B Branch C1 The central axis of the toilet bowl in the left-right direction D Drain pipe F Floor S Drain Socket T tank device (cleaning water supply device) U Power outage control device V0 Rear functional storage area W0 Main water supply source w1 Drain water

Claims

1. A flush toilet that is flushed with flush water to expel waste, A toilet body having a bowl portion for receiving waste; A functional part provided in the toilet body, The functional unit includes a base fixed to the toilet body, an opening including a waterproof area provided on the base, an actuation unit including an electrical component disposed on the base, an operation unit that enables operation of the actuation unit or an operation other than the functional unit, and an upper cover member that covers the upper part of the opening in an openable and closable manner; the opening includes a peripheral wall portion provided to separate the operation unit from the electrical equipment portion, the peripheral wall portion being spaced apart from the periphery of the operation unit to form the waterproof area in which the operation unit can be disposed, The functional part further includes a water drainage opening that communicates with the outside of the functional part to enable water drainage, The flush toilet further comprises a guide groove formed below the drainage opening and concavely on the toilet body side, and extending toward the outside of the functional part so that water within the waterproof area can be guided from the drainage opening to the outside of the functional part.

2. 2. The flush toilet according to claim 1, wherein the drain opening is disposed in the peripheral wall portion provided in the waterproof area.

3. A flush toilet as described in claim 1 or 2, wherein the electrical equipment is provided on the other side of the left or right center of the toilet body in the left-right direction, and the water drain opening is positioned on one side of the left or right center of the toilet body in the left-right direction so as to be spaced apart from the electrical equipment, and is provided on the outside of the toilet body.

4. 2. The flush toilet according to claim 1, wherein the drainage opening is provided in the base which forms the bottom surface of the waterproof area, and the drainage opening in the base is provided so as to cover the guide groove from above.

5. 5. The flush toilet according to claim 1 or 4, further comprising a rear cover member that is provided on the toilet body and covers the functional section from the rear side, and the guide groove is provided in the rear cover member.

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