Flush toilet bowl

Abstract

To prevent waste water from entering between the upper surface of a rim part and the lower surface of a base part for mounting a private parts cleaning device.SOLUTION: A flush toilet bowl according to an embodiment comprises a toilet body, a private parts cleaning device, a base portion, and a curved rim portion. The toilet body comprises a bowl portion and a drain trap pipe. The bowl portion comprises a waste receiving surface and a rim portion connected to the upper edge of the waste receiving surface. The drain trap pipe extends from the bottom of the bowl portion and discharges waste from the bowl portion. The private parts cleaning device has a nozzle portion that is provided at the rear of the bowl portion and advances toward the waste receiving surface side to spray cleaning water in a predetermined direction. The base portion is provided on the rear upper surface of the toilet body, including the rear upper surface of the bowl portion. The base portion is for installing the private parts cleaning device. The curved rim portion has, in a region including at least a portion corresponding to the nozzle portion at the rear of the bowl portion, a connection end portion between the rim portion and the waste receiving surface, the connection end portion being formed into a concave curved surface.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The disclosed embodiments relate to a flush toilet. [Background technology]

[0002] Conventionally, flush toilets have been widely known which include a bowl portion having a waste receiving surface and a rim portion connected to the upper edge of the waste receiving surface, and which are equipped with a private part washing device having a nozzle portion which advances from the rear of the bowl portion to the front side where the waste receiving surface is located and sprays washing water in a predetermined direction.

[0003] Among such flush toilets are those in which a flat surface sloping downward toward the front is formed at the connection end where the rim portion connects to the waste receiving surface, in the area corresponding to the nozzle portion in the rear region of the bowl, and those that have a retractable structure in which a recess is formed in the upper surface of the rim portion in the area corresponding to the nozzle portion in the rear region of the bowl (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-062799 [Patent Document 2] JP 2010-196375 A Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional flush toilets like those described above, flush water (wastewater) that splashes up from the waste receiving surface side during the flushing operation of the bowl of the flush toilet tends to run up to the top surface of the rim, causing the risk of the wastewater seeping in between the top surface of the rim and the bottom surface of the base on which the private parts cleaning device is installed. If wastewater seeps in between the top surface of the rim and the bottom surface of the base, the seeping in wastewater can cause odors and other issues.

[0006] One aspect of the embodiment has an object to provide a flush toilet that can prevent sewage from entering between the upper surface of the rim and the underside of the base on which the private parts cleaning device is installed. [Means for solving the problem]

[0007] A flush toilet according to one aspect of the embodiment comprises a toilet body having a waste receiving surface for receiving waste, a bowl portion connected to the upper edge of the waste receiving surface and having a rim portion formed with a rim water channel for swirling flushing water for cleaning the part to be cleaned including the waste receiving surface, and a drain trap pipe extending from the bottom of the bowl portion for discharging waste from the bowl portion, a personal cleansing device provided at the rear of the bowl portion and having a nozzle portion that advances toward the waste receiving surface and sprays flushing water in a predetermined direction, a base portion for mounting the personal cleansing device provided on the rear upper surface of the toilet body including the rear upper surface of the bowl portion, and a rim curved surface portion in which the connection end of the rim portion with the waste receiving surface in an area including at least the part of the rear of the bowl portion corresponding to the nozzle portion is formed into a concave curved surface.

[0008] With this configuration, the concave curved surface of the rim curved surface portion formed on the rim portion can prevent flushing water (wastewater) that splashes up from the waste receiving surface side during the flushing operation of the bowl portion, including the waste receiving surface of the flush toilet, from running up the rim portion to the upper surface of the bowl portion, i.e., the upper surface of the rim portion. This can prevent wastewater from seeping in between the upper surface of the rim portion and the lower surface of the base portion, and can also prevent the generation of odors caused by wastewater that has seeped in between the upper surface of the rim portion and the lower surface of the base portion.

[0009] Additionally, in the above flush toilet, the tangent angle of the curved surface at the lowermost end of the rim curved surface portion is less than 0 degrees with respect to the horizontal direction.

[0010] With this configuration, the rim curved surface is a curved surface with a tangent angle that slopes downward even at the bottom end, so that sewage adhering to the rim curved surface flows toward the waste receiving surface. This not only prevents sewage from running up, but also prevents sewage adhering to the rim curved surface from remaining on the rim curved surface.

[0011] Furthermore, in the above flush toilet, the base portion has a front end portion that corresponds to the curved rim portion so as to overlap the top of the curved rim portion, and the front end portion is positioned below the upper surface of the rim portion.

[0012] With this configuration, the front end of the base does not impede the movement of the nozzle, which can advance toward the waste receiving surface, so the nozzle can be located at a lower position, making it possible to achieve a low-profile flush toilet.

[0013] Furthermore, in the above flush toilet, the front end portion has a first curved portion that is concave and formed with approximately the same curvature as the curved surface of the rim curved surface portion.

[0014] With this configuration, the front end portion of the base has a first curved portion formed with approximately the same curvature as the curved surface of the rim curved surface portion, so that at the first curved portion, the front end portion of the base has approximately the same shape as the curved surface of the rim curved surface portion. In this way, because the first curved portion of the front end portion of the base has approximately the same shape as the curved surface of the rim curved surface portion, the front end portion can be brought close to the rim curved surface portion, and because the front end portion of the base does not impede the movement of the nozzle portion, which can advance toward the waste receiving surface, the nozzle portion can be located at a lower position. This makes it possible to achieve a low silhouette for the flush toilet.

[0015] Furthermore, in the above flush toilet, the front end portion has a convex second curved portion formed forward of the first curved portion and continuing from the first curved portion.

[0016] With this configuration, the second curved portion functions to receive sewage that splashes up from the waste receiving surface, further preventing sewage from running up. Also, because the second curved portion is convex, the space between the second curved portion and the rim curved portion is wide, so there is no risk of sewage being drawn in by capillary action, which can occur when the space between the second curved portion and the rim curved portion is narrow. Effect of the Invention

[0017] A flush toilet according to one aspect of the embodiment can prevent wastewater from entering between the upper surface of the rim and the underside of the base on which the private parts cleaning device is mounted. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic perspective view showing a flush toilet according to an embodiment. [Diagram 2] FIG. 2 is a schematic plan view showing a flush toilet according to an embodiment. [Diagram 3] FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. [Figure 4] Figure 4 is an explanatory diagram (part 1) of the structure for preventing sewage infiltration. [Diagram 5] Figure 5 is an explanatory diagram (part 2) of the structure for preventing sewage infiltration. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Below, an embodiment of a flush toilet disclosed in the present application will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiment described below.

[0020] <Outline of Flush Toilet> An overview of a flush toilet 1 according to an embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic perspective view of a flush toilet 1 according to an embodiment. Figure 2 is a schematic plan view of a flush toilet 1 according to an embodiment. Note that in Figure 2, the genital cleansing device 4 has been omitted and only the base 5 is shown.

[0021] 1 to 3 show a three-dimensional Cartesian coordinate system including a Z-axis whose positive direction is vertically upward (upward). In the following, for convenience of explanation, the positive direction of the X-axis is defined as the leftward direction, the negative direction of the X-axis as the rightward direction, the positive direction of the Y-axis as the forward direction, and the negative direction of the Y-axis as the backward direction, and the X-axis direction may be referred to as the left-right direction, the Y-axis direction as the front-back direction, and the Z-axis direction as the up-down direction.

[0022] As shown in Figure 1, the flush toilet 1 is a so-called floor-mounted flush toilet that is installed on the floor of a toilet room. However, the flush toilet 1 may also be a so-called wall-hung flush toilet that is installed on the wall of a toilet room.

[0023] The flush toilet 1 comprises a toilet body 2, a functional section 3, a private parts cleansing device 4, and a base section 5. The toilet body 2 is made of, for example, ceramic. However, the toilet body 2 is not limited to being made of ceramic, and may be made of, for example, resin, or a combination of ceramic and resin.

[0024] The toilet body 2 comprises a bowl portion 21, a drain trap pipe 22, and a skirt portion 23. The bowl portion 21 comprises a waste receiving surface 211 and a rim portion 212. The waste receiving surface 211 is a portion of the bowl portion 21 that receives waste. The waste receiving surface 211 is formed in a concave shape on the upper surface 21a of the bowl portion 21.

[0025] The rim portion 212 is connected to the upper edge of the waste receiving surface 211. The rim portion 212 is formed in a ring shape along the upper edge of the waste receiving surface 211. The rim portion 212 comprises a first water outlet 212b, a rim water channel 212c, and a second water outlet (not shown). The first water outlet 212b discharges flush water W1 supplied to the toilet body 2 from a water tank (not shown) or the like, into the inside of the rim water channel 212c, which will be described later.

[0026] The rim water conduit 212c is formed inside the rim section 212. The rim water conduit 212c is formed in a ring shape following the shape of the rim section 212 when viewed from above (plan) the flush toilet 1. The rim water conduit 212c is provided with a first water outlet 212b on the upstream side in the flow direction of the flush water W1. The rim water conduit 212c also is provided with a second water outlet 212b on the downstream side in the flow direction of the flush water W1, which discharges the flush water W1 towards the waste receiving surface 211.

[0027] The rim water conduit 212c swirls the flush water W1 from the first water outlet 212b, and discharges the swirled flush water W1 from the second water outlet towards the waste receiving surface 211. The flush water W1 discharged from the second water outlet becomes a swirling flow that flows while swirling over the waste receiving surface 211, and washes the parts to be washed, including the waste receiving surface 211, in the bowl portion 21. The parts to be washed in the bowl portion 21 include the waste receiving surface 211, as well as the connection part between the waste receiving surface 211 and the rim portion 212.

[0028] The drain trap pipe 22 has an upstream side in the flow direction of the flush water W1 connected to the bottom 211a of the waste receiving surface 211 in the bowl portion 21. The drain trap pipe 22 extends, for example, downward and rearward from the bottom 211a of the waste receiving surface 211.

[0029] Furthermore, the downstream side of the drain trap pipe 22 in the flow direction of the flush water W1 is connected to an external pipe (not shown) via a drain socket (not shown). The drain trap pipe 22 discharges the waste received on the waste receiving surface 211 to the external pipe by the flush water W1 discharged from the second water outlet.

[0030] Skirt portion 23 is provided so as to surround bowl portion 21 and drain trap pipe line 22 from the outside. Skirt portion 23 forms the side peripheral surface of toilet body 2. Skirt portion 23 may be made of ceramic and provided integrally with toilet body 2, or it may be, for example, a panel member made of resin or the like that is provided separately from toilet body 2 and is removable from toilet body 2.

[0031] The functional unit 3 is provided at the rear of the toilet body 2. The functional unit 3 has the function of supplying water to, for example, the bowl unit 21 and the private parts cleansing device 4 described below. The functional unit 3 includes, for example, a water storage tank and a pressure pump (not shown), and pressurizes wash water stored in the water storage tank with the pressure pump, causing it to be discharged from a jet water outlet (not shown) towards the waste receiving surface 211.

[0032] The private parts cleaning device 4 is provided on the upper surface 2a of the toilet body 2. The private parts cleaning device 4 comprises a main body 41 and a toilet seat (not shown). The main body 41 is provided on the rear upper surface (upper surface 2a) of the toilet body 2, including the rear upper surface (upper surface 21a) of the bowl part 21. The main body 41 comprises a case cover 411 that covers the inside from above. The main body 41 also comprises a nozzle part 412. The nozzle part 412 is provided inside the main body 41, and is provided in the center in the left-right direction at the rear of the bowl part 21.

[0033] Nozzle portion 412 is provided so as to be able to advance and retreat by sliding in a predetermined direction, and advances from the rear of bowl portion 21 to the front side toward waste receiving surface 211 to spray cleansing water in a predetermined direction. Private part cleansing device 4 sprays cleansing water from nozzle portion 412 to clean the private parts of the user. The toilet seat portion is where the user sits, and is provided in front of main body portion 41. Note that private part cleansing device 4 may be provided with an openable and closable lid portion that covers the toilet seat portion from above.

[0034] In addition to the private parts cleaning function, the private parts cleaning device 4 may also have a drying function that blows warm air onto the buttocks of the user sitting on the toilet seat to dry them, and a toilet seat heating function that warms the seating surface of the toilet seat to an appropriate temperature.

[0035] The private parts washing device 4 also includes a control unit (not shown). The control unit controls the nozzle unit 412. The control unit controls, for example, the lid unit that performs automatic opening and closing, and each unit that performs drying and toilet seat heating.

[0036] The control unit is realized by, for example, a central processing unit (CPU) or a micro processing unit (MPU) executing a program stored in a storage unit (not shown) using a random access memory (RAM) as a working area. The storage unit is realized by, for example, a semiconductor memory element such as a RAM or a flash memory.

[0037] Furthermore, the power for sliding (advancing and retracting) nozzle portion 412 does not necessarily need to be an electric actuator such as a motor or solenoid, and may be a mechanical type that utilizes, for example, the primary pressure of waterworks or the elastic force of a spring.

[0038] As shown in Fig. 2, the base 5 is provided on the rear upper surface (upper surface 2a) of the toilet body 2, which includes the rear upper surfaces (upper surface 212a) of the bowl 21 and the rim 212. The base 5 is a member for installing the local cleansing device 4 (see Fig. 1) on the upper surface 2a of the toilet body 2. The base 5 is a plate-shaped member. The base 5 is a case plate that, together with the case cover 411, covers the inside of the main body 41 (see Fig. 1) of the local cleansing device 4.

[0039] The base portion 5 also has a front end portion 51 that corresponds to the rim curved surface portion 6 (see FIG. 3) so as to overlap above the rim curved surface portion 6. The detailed configuration of the front end portion 51 of the base portion 5 will be described later with reference to FIG.

[0040] The flush toilet 1 is equipped with a rim curved surface portion 6. The rim curved surface portion 6 is a region A (hereinafter referred to as the rear region) that includes at least the portion of the rear of the bowl portion 21 that corresponds to the nozzle portion 412. B , it is formed on the upper surface 212a of the rim portion 212. The detailed configuration of the front end portion 51 of the rim curved surface portion 6 will be described later with reference to FIG.

[0041] Here, in the past, washing water (hereinafter referred to as dirty water) that splashed up from the waste receiving surface side during the washing operation of the bowl part was likely to run up to the upper surface of the rim part, and there was a risk of the dirty water seeping in between the upper surface of the rim part and the lower surface of the base part on which the private parts washing device is installed. If dirty water seeps in between the upper surface of the rim part and the lower surface of the base part, the seeping in dirty water will cause odors, etc.

[0042] For this reason, in this embodiment, by providing a structure for suppressing the infiltration of the sewage W2, it is possible to suppress the infiltration of the sewage W2 between the upper surface 212a of the rim portion 212 and the lower surface 5a of the base portion 5.

[0043] <Structure to prevent sewage infiltration> The structure for suppressing infiltration of sewage W2 will be described with reference to Figures 3 to 5. Figure 3 is a schematic cross-sectional view taken along line III-III in Figure 2. Figures 4 and 5 are explanatory diagrams of the structure for suppressing infiltration of sewage W2. Figures 4 and 5 each show a schematic view of the structure for suppressing infiltration of sewage W2.

[0044] As shown in FIG. 3, the structure for suppressing the intrusion of sewage W2 (see FIGS. 4 and 5) includes a rim curved surface portion 6. The rim curved surface portion 6 is formed in the rear region A of the bowl portion 21. B 2, a connection end 212d of the rim portion 212 with the waste receiving surface 211 is formed as a concave curved surface.

[0045] The curved surface 61 is a rear region A of the bowl portion 21. B 2), in the center in the left-right direction where nozzle portion 412 is disposed. In other words, curved surface 61 is formed below nozzle portion 412. Curved surface 61 is preferably formed below nozzle portion 412 with a width slightly wider than the length (width) of nozzle portion 412 in the left-right direction. Incidentally, curved surface 61 is formed in the rear region A of bowl portion 21 including the area below nozzle portion 412. B The width of the insulating film 11 may be any desired width.

[0046] In addition, the curved surface 61 is tangent L of the curved surface 61 at the bottom end of the rim curved surface portion 6 (curved surface 61).T The angle (tangent angle) α is horizontal (horizontal line L H ) is less than 0 degrees. That is, the curved surface 61 is a curved surface in which the tangent angle α is inclined downward even at the bottom end of the rim curved surface portion 6 (curved surface 61).

[0047] The structure for suppressing infiltration of sewage W2 also includes a front end portion 51 of the base portion 5. The front end portion 51 is a portion that corresponds to the rim curved surface portion 6 so as to overlap above the curved surface 61 of the rim curved surface portion 6. The front end portion 51 is positioned below the upper surface 212a of the rim portion 212. The front end portion 51 also includes a first curved portion 511 and a second curved portion 512.

[0048] The first curved portion 511 is a curved surface that is concave in side view of the front end portion 51, formed with approximately the same curvature as the curved surface 61 of the rim curved portion 6. The first curved portion 511 is provided close to, and maintains a predetermined distance from, the curved surface 61 of the rim curved portion 6. The first curved portion 511 is a portion of the front end portion 51 that overlaps with the curved surface 61 of the rim curved portion 6 up to a midpoint in the front-to-rear direction.

[0049] The second curved portion 512 is a convex curved surface in a side view of the front end portion 51. The second curved portion 512 is a portion of the front end portion 51 that is further forward than the first curved portion 511. The second curved portion 512 is formed so as to be continuous with the first curved portion 511, and extends forward from the first curved portion 511.

[0050] As shown in Figure 4, in the structure for preventing the infiltration of sewage W2, sewage W2 that splashes up from the waste receiving surface 211 side during the flushing operation of the flush toilet 1 (see Figure 1) is less likely to run up the curved surface 61 of the rim curved portion 6, and sewage W2 that adheres to the curved surface 61 also flows downward along this curved surface 61.

[0051] As shown in Figure 5, in the structure for preventing the infiltration of sewage W2, the first curved portion 511 of the front end portion 51 of the base portion 5 has a shape that is approximately the same as the curved surface 61 of the rim curved portion 6, and since the first curved portion 511 is close to the curved surface 61, sewage W2 that splashes up from the waste receiving surface 211 side is less likely to run up the curved surface 61 of the rim curved portion 6.

[0052] Furthermore, in the structure for suppressing the infiltration of sewage W2, the second curved portion 512 functions to receive the sewage W2 that splashes up from the waste receiving surface 211 side, so the sewage W2 that splashes up from the waste receiving surface 211 side is less likely to run up the curved surface 61 of the rim curved portion 6. Furthermore, because the space S between the convex second curved portion 512 and the curved surface 61 of the rim curved portion 6 is widened, there is no risk of the sewage W2 being drawn in by capillary action.

[0053] Thus, with the flush toilet 1 according to this embodiment, the concave curved surface 61 of the rim curved surface portion 6 formed on the rim portion 212 can prevent wastewater W2 that splashes up from the waste receiving surface 211 side during the flushing operation of the bowl portion 21, which includes the waste receiving surface 211 of the flush toilet 1, from running up the rim portion 212 to the upper surface 212a of the rim portion 212. This reduces the gap S between the upper surface 212a of the rim portion 212 and the lower surface 5a of the base portion 5. G ) can be prevented from entering the gap S between the upper surface 212a of the rim portion 212 and the lower surface 5a of the base portion 5. G This can suppress the generation of odors caused by wastewater W2 that has seeped into the

[0054] Furthermore, because the rim curved portion 6 has a curved surface 61 with a tangent angle α sloping downward even at the bottom end, the wastewater W2 adhering to the rim curved portion 6 flows toward the waste receiving surface 211. This not only prevents the wastewater W2 from running up, but also prevents the wastewater W2 adhering to the rim curved portion 6 from remaining on the rim curved portion 6.

[0055] Additionally, because the front end portion 51 of the base portion 5 does not impede the movement of the nozzle portion 412, which can advance toward the waste receiving surface 211, the nozzle portion 412 can be placed in a lower position. This makes it possible to achieve a low silhouette for the flush toilet 1.

[0056] Furthermore, because the front end portion 51 of the base portion 5 has a first curved portion 511 formed with approximately the same curvature as the curved surface 61 of the rim curved portion 6, the front end portion 51 of the base portion 5 has approximately the same shape as the curved surface 61 of the rim curved portion 6 at the first curved portion 511. In this way, because the first curved portion 511 has approximately the same shape as the curved surface 61 of the rim curved portion 6, the first curved portion 511 can be brought close to the rim curved portion 6, and because the front end portion 51 of the base portion 5 does not impede the movement of the nozzle portion 412, which can advance toward the waste receiving surface 211, the nozzle portion 412 can be provided in a lower position. This allows the flush toilet 1 to have a low silhouette.

[0057] In addition, the second curved portion 512 functions to receive the wastewater W2 that splashes up from the waste receiving surface 211 side, so that the wastewater W2 can be further prevented from running up. In addition, since the second curved portion 512 is convex, the space S between the second curved portion 512 and the rim curved portion 6 is widened, so that there is no risk of the wastewater W2 being drawn in by capillary action, which may occur when the space S between the second curved portion 512 and the rim curved portion 6 is narrow, for example.

[0058] In the above embodiment, the second curved portion 512 extends forward from the first curved portion 511 at the front end portion 51 of the base portion 5, but for example, the base portion 5 may be formed only with the first curved portion 511 without forming the second curved portion 512. In this case, the first curved portion 511 extends forward so as to cover the curved surface 61 of the rim curved portion 6.

[0059] Furthermore, although the second curved portion 512 is formed as a convex curved surface, for example, the second curved portion 512 may be formed as a flat surface. Also, for example, the second curved portion 512 may be formed as a concave curved surface.

[0060] It is also possible to form the curved surface 61 of the rim curved portion 6 into a curved surface in which the tangent angle α of the curved surface 61 gradually slopes from the upper side to the lower side.

[0061] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0062] 1 flush toilet 2 Toilet bowl body 4. Local cleaning device 5 Pedestal 6 Rim curved surface 21 Bowl section 21a Top side 22 Drain trap pipe 51 Front end part 61 Curved Surface 211 Waste receiving surface 211a bottom 212 Rim section 212a Top side 212c Rim Waterway 212d Connection end 412 Nozzle section 511 First curve 512 Second curved section A B Area (posterior area) W1 Cleaning water W2 Cleaning water (dirty water) α tangent angle

Claims

1. a toilet body including a waste receiving surface for receiving waste, a bowl portion having a rim portion connected to an upper edge of the waste receiving surface and having a rim water channel formed therein for swirling flush water for flushing a portion to be flushed including the waste receiving surface, and a drain trap pipe extending from a bottom of the bowl portion for discharging waste from the bowl portion; a local cleaning device having a nozzle portion provided at the rear of the bowl portion and extending toward the waste receiving surface side to spray cleaning water in a predetermined direction; a base portion for mounting the private parts cleaning device, the base portion being provided on a rear upper surface of the toilet body including a rear upper surface of the bowl portion; a rim curved surface portion, the end portion of the rim portion connected to the waste receiving surface in a region including at least a portion of the rear portion of the bowl portion corresponding to the nozzle portion, being formed into a concave curved surface; Equipped A flush toilet characterized by:

2. The tangent angle of the curved surface at the lowest end of the rim curved surface portion is less than 0 degrees with respect to the horizontal direction.

2. The flush toilet according to claim 1.

3. the pedestal portion has a front end portion that corresponds to the rim curved surface portion so as to be overlapped above the rim curved surface portion, The front end portion is disposed below the upper surface of the rim portion.

2. The flush toilet according to claim 1.

4. The front end portion has a first curved portion having a concave shape formed with a curvature substantially equal to the curved surface of the rim curved surface portion.

4. The flush toilet according to claim 3.

5. The front end portion has a convex second curved portion formed forward of the first curved portion so as to be continuous with the first curved portion.

5. The flush toilet according to claim 4.

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