JP2023102349A - toilet bowl - Google Patents

Abstract

To make it easier to manufacture a toilet bowl with which urine and the like are less likely to splash out of the excreta bowl part.SOLUTION: A toilet bowl 1 comprises an excreta bowl part 10 that consists of: a rim part 20 having a rim internal surface 21; a bowl part 60 having a dirt-receiving surface 60A; and a first connection part 40 having a first connection surface 40A of which the top edge continues to the bottom edge of the rim internal surface 21 and the bottom edge continues to the top edge of the dirt-receiving surface 60A. In the toilet bowl 1, the first connection surface 40A in the front side region of the first connection part 40 comprises an upper connection surface 41 continuing to the bottom edge of the rim internal surface 21A and a lower connection surface 45 continuing to the top edge of the dirt-receiving surface 60A, and at least a part of the first connection surface 40A in the front side region shows the curvature radius of the upper connection surface 41 and the curvature radius of the lower connection surface 45 being different from each other in the vertical section profile along the vertical plane passing the center 10C of the excreta bowl part 10 in a plan view.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to toilet bowls.

Patent Literature 1 discloses a conventional toilet bowl. This toilet bowl has a toilet bowl. The toilet bowl includes a bowl having a rim, a connecting portion, a ledge, and a waste receiving surface. The connecting portion connects the lower end portion of the rim portion and the outer edge of the shelf portion. The inner edge of the shelf is continuous with the upper edge of the bowl. The connecting portion has a urine contact surface, a first connecting portion, and a second connecting portion. The urine contact surface is not curved but inclined. The first connecting portion connects the upper edge of the urine contact surface and the lower edge of the rim portion with a curved surface. The second connecting portion connects the lower edge of the urine contact surface and the outer edge of the shelf with a curved surface. The radii of curvature in the vertical direction of the respective curved surfaces of the first connecting portion and the second connecting portion are substantially constant from the front portion of the toilet bowl portion to the left and right sides. This toilet suppresses urine from running up along the inner peripheral surface of the rim and jumping out of the toilet bowl by forming a urine contact surface in a predetermined area in the front of the toilet bowl where urine easily collides.

JP 2018-48520 A

The toilet bowl disclosed in Patent Document 1 has difficulty in manufacturing and restricts the design because it is necessary to form an inclined urine contact surface instead of a curved surface over the entire range where urine collides.

The present disclosure has been made in view of the above-described conventional circumstances, and aims to solve the problem of facilitating the manufacture of a toilet in which urine and the like are less likely to scatter outside the toilet bowl.

The toilet bowl of the present disclosure includes a rim portion having an inner rim wall surface, a bowl portion having a waste receiving surface, and a connecting portion having a connecting surface whose upper end is continuous with the lower end of the inner rim wall surface and whose lower end is continuous with the upper end of the waste receiving surface. At least a part of the connection surface of is different in curvature radius of the upper connection surface and curvature radius of the lower connection surface in a vertical cross-sectional shape cut by a vertical plane passing through the center of the toilet bowl portion in plan view.

The center of the toilet bowl in a plan view is the intersection of the left-right center line and the front-rear center line with respect to the upper end opening of the toilet bowl. The upper edge of the inner wall surface of the rim corresponds to the edge of the upper opening of the toilet bowl.

Fig. 2 is a plan view showing the toilet bowl of Embodiment 1; FIG. 2 is a cross-sectional view showing a cross section taken along line AA in FIG. 1; FIG. 2 is a cross-sectional view showing a cross section taken along line EE in FIG. 1; 1 is a perspective view showing the toilet bowl of Embodiment 1. FIG. FIG. 2 is a cross-sectional view showing a main part of a cross section taken along the arrow AA in FIG. 1; FIG. 2 is a cross-sectional view showing a main part of a cross section taken along line BB in FIG. 1; FIG. 2 is a cross-sectional view showing a main part of a cross section taken along line CC of FIG. 1; FIG. 2 is a cross-sectional view showing a main part of a cross section taken along line DD in FIG. 1;

A first embodiment embodying the toilet bowl 1 of the present disclosure will be described with reference to the drawings. In the following description, the vertical direction is the vertical direction when the toilet bowl 1 is installed on a horizontal installation surface. Regarding the front-rear direction, when the toilet bowl 1 is installed on a horizontal installation surface, the direction in which the tank mounting portion 130 is provided with respect to the toilet bowl portion 10 is the rear side, and the opposite direction is the front side. The left-right direction is the left-right direction viewed from the front when the toilet bowl 1 is installed on a horizontal installation surface. 1 to 3, the upward direction is the positive direction of the X-axis, the downward direction is the negative direction of the X-axis, the forward direction is the positive direction of the Z-axis, the backward direction is the negative direction of the Z-axis, the left direction is the positive direction of the Y-axis, and the right direction is the negative direction of the Y-axis.

<Embodiment 1>
The toilet bowl 1 of Embodiment 1 includes a toilet bowl portion 10, a toilet drainage channel 110, an upper wall portion 120, a tank mounting portion 130, and a peripheral wall portion 140, as shown in FIGS. The toilet stool 1 is made of pottery integrally molded. The toilet bowl portion 10 is provided with a rim portion 20, a first connecting portion 40, a bowl portion 60, a second connecting portion 80, and a recessed portion 90 in this order from the upper end downward.

The rim portion 20 has an inner rim wall portion 21 and an upper rim wall portion 23 . The rim portion 20 constitutes the upper end portion of the toilet bowl portion 10 . The rim inner wall portion 21 encircles the upper portion of the toilet bowl portion 10 . The rim inner wall surface 21</b>A is a surface facing inward of the rim inner wall portion 21 and has a belt shape that encircles the upper portion of the toilet bowl portion 10 . As shown in FIG. 1, the upper peripheral edge of the rim inner wall surface 21A has a substantially elliptical shape in which the radius of curvature of the front end portion is smaller than the radius of curvature of the rear end portion in plan view. As shown in FIGS. 2 and 3, the upper end portion of the rim inner wall surface 21A is a curved surface that slopes downward gradually. The upper peripheral edge of the inner rim wall surface 21A is the upper edge of the curved surface formed at the upper end portion of the inner rim wall surface 21A. The upper peripheral edge of the inner rim wall surface 21A corresponds to the peripheral edge of the upper opening 10A of the toilet bowl portion 10 . A rim inner wall surface 21A below the curved upper end portion is inclined downward and slightly inward.

As shown in FIGS. 1 to 3, the rear portion of the rim inner wall portion 21 constitutes a front wall portion 22 of a water supply space 150S, which will be described later. The rim inner wall portion 21 is formed with a rim spout 25 that is long in the circumferential direction on the left side of the left-right center of the rear portion. The rim spout 25 penetrates the rim inner wall portion 21 in the front-rear direction. In the water supply space 150S, the wash water discharged from the wash water pipe 150, which will be described later, is discharged from the rim spout 25 into the toilet bowl portion 10. As shown in FIG.

The rim upper wall portion 23 continues to the upper peripheral edge portion of the rim inner wall portion 21 and spreads outward. The rim upper wall portion 23 goes around along the upper peripheral edge of the rim inner wall portion 21 . The rim upper wall surface 23A is a surface of the rim upper wall portion 23 facing upward, and is a horizontally extending annular plane. The rim upper wall surface 23A is symmetrical with respect to the lateral center line CL1 of the toilet bowl 10 in plan view. The width of the rim upper wall surface 23A increases slightly from both left and right sides toward the front end.

The first connecting portion 40 is continuous with the lower peripheral edge of the rim inner wall portion 21 as shown in FIGS. 1 to 8 . The first connecting portion 40 makes a round along the lower peripheral edge of the rim inner wall portion 21 . 40 A of 1st connection surfaces are surfaces which faced the inward direction of the 1st connection part 40. As shown in FIG. 40 A of 1st connection surfaces are plane-symmetrical shape with respect to the vertical plane containing right-and-left center line CL1 of the toilet bowl part 10. As shown in FIG.

The first connecting surface 40A in the front region of the first connecting portion 40 has an upper connecting surface 41, an intermediate connecting surface 43, and a lower connecting surface 45, as shown in FIGS. As shown in FIG. 1, the first connecting surface 40A in the front region of the first connecting portion 40 is provided between the pair of second imaginary straight lines L2, L2 in plan view. The pair of second imaginary straight lines L2, L2 are line-symmetrical with respect to the left-right center line CL1 of the toilet bowl 10 in a plan view, and extend obliquely forward to the left and right from the center 10C of the toilet bowl 10. As shown in FIG. The angle β between the pair of second imaginary straight lines L2, L2 is approximately 135 degrees. A center 10C of the toilet bowl 10 in a plan view is a point where the left-right center line CL1 and the front-rear center line CL2 with respect to the upper end opening 10A of the toilet bowl 10 intersect.

As shown in FIGS. 1, 2, and 4 to 6, the upper edge of the upper connecting surface 41 is continuous with the lower edge of the rim inner wall surface 21A. As shown in FIGS. 5 to 7, the upper connecting surface 41 is a curved surface whose inclination angle gradually becomes gentler from the upper end edge toward the lower inner side. In a vertical cross-sectional shape (hereinafter referred to as "vertical cross-sectional shape") cut by a vertical plane passing through the center 10C of the toilet bowl portion 10 in plan view, the radius of curvature of the upper connecting surface 41 is about 8 mm, which is substantially constant.

As shown in FIGS. 1, 2, and 4 to 8, both left and right ends of the front region of the first connecting portion 40 are continuous with the front end portion of the front-rear central region of the first connecting portion 40. As shown in FIGS. The first connecting portion 40 in the front-rear center region extends in the front-rear direction on both the left and right sides of the toilet bowl portion 10 . Both left and right ends of the upper connecting surface 41 are continuous with the first connecting surface 40</b>A in the front-rear central region of the first connecting portion 40 . 40 A of 1st connection surfaces of a front-back center area|region have a curvature radius of about 8 mm in a vertical cross-sectional shape. 40 A of 1st connection surfaces of a front-back center area|region are substantially constant width|variety in planar view.

As shown in FIG. 1, the intermediate connecting surface 43 is provided between the pair of third imaginary straight lines L3, L3 in plan view. The pair of third imaginary straight lines L3, L3 are line-symmetrical with respect to the left-right center line CL1 of the toilet bowl 10 in plan view, and extend diagonally forward from the center 10C of the toilet bowl 10 in the left-right direction. The angle γ between the pair of third imaginary straight lines L3, L3 is approximately 80 degrees.

The upper edge of the intermediate connecting surface 43 is continuous with the lower edge of the upper connecting surface 41 as shown in FIGS. The central portion of the intermediate connecting surface 43 has substantially the same length in vertical cross-section. The substantially equal length in the vertical cross-sectional shape means that the change in length is within 20%. Both the left and right ends of the intermediate connecting surface 43 are tapered toward the left and right ends, and have a sharp shape at the left and right ends. As shown in FIG. 1, the central portion of the intermediate connecting surface 43 having substantially the same length in the vertical cross-sectional shape is provided between the pair of first imaginary straight lines L1, L1 in plan view. The pair of first imaginary straight lines L1, L1 are line-symmetrical with respect to the left-right center line CL1 of the toilet bowl 10 in plan view, and extend obliquely forward in the left-right direction from the center 10C of the toilet bowl 10 . The angle α between the pair of first imaginary straight lines L1, L1 is approximately 50 degrees. The intermediate connecting surface 43 has a substantially straight vertical cross-sectional shape and a substantially infinite radius of curvature.

As shown in FIGS. 1 and 4, the upper edge of the lower connecting surface 45 is continuous with the lower edge of the intermediate connecting surface 43 at the central portion (between the pair of third imaginary straight lines L3, L3 in plan view). The upper edge of the lower connecting surface 45 is continuous with the lower edge of the upper connecting surface 41 at both left and right ends (in the laterally outward direction from the pair of third imaginary straight lines L3, L3 in plan view). As shown in FIG. 1, the lower connecting surface 45 has a shape in which both the left and right ends thereof are sharpened gradually from the pair of third imaginary straight lines L3, L3 in plan view toward the left and right rearward direction. The upper connecting surface 41 and the lower connecting surface 45 extend left and right rearward from the intermediate connecting surface 43 . Since the first connecting surface 40A having substantially the same curved shape extends rearward continuously from both left and right ends of the upper connecting surface 41, it can be said that the upper connecting surface 41 extends further to the left and right rear than the lower connecting surface 45.

As shown in FIGS. 5 to 7, in the vertical cross-sectional shape, the radius of curvature of the lower connecting surface 45 is approximately 21 mm, which is substantially constant. In the vertical cross-sectional shape, the radius of curvature of the lower connecting surface 45 is larger than the radius of curvature of the upper connecting surface 41 . In the vertical cross-sectional shape, the radius of curvature of the intermediate connecting surface 43 is substantially infinite and larger than the radius of curvature of the upper connecting surface 41 and the radius of curvature of the lower connecting surface 45 . In the vertical cross-sectional shape, the length of the intermediate connecting surface 43 is shorter than the length of the upper connecting surface 41 and the length of the lower connecting surface 45 .

As shown in FIGS. 1 to 3 , the rear end portions of the front and rear central regions of the first connecting portion 40 are respectively continuous with the left and right end portions of the rear side region of the first connecting portion 40 . 40 A of 1st connection surfaces of the rear side area|region of the 1st connection part 40 become wide gradually toward a left-right center part in planar view. The lower edge of the first connecting surface 40A in the rear region of the first connecting portion 40 is curved so as to swell downward so that the center of the left and right is the lowest.

The pot portion 60 is continuous with the lower peripheral edge portion of the first connecting portion 40 as shown in FIGS. 1 to 8 . The filth receiving surface 60A is a surface of the bowl portion 60 facing upward inside the toilet bowl portion 10, and extends obliquely downward and inward from the outer peripheral edge.

The second connecting portion 80 is continuous with the bottom edge portion of the pot portion 60 . The second connecting surface 80A is a surface of the second connecting portion 80 facing inward of the toilet bowl portion 10, and widens while curving downward and inward from the upper end peripheral edge so that the angle of inclination gradually increases.

The recess 90 has a side wall portion 91 and a bottom wall portion 93, as shown in FIGS. A side wall portion 91 of the recessed portion 90 is continuous with the lower peripheral edge portion of the second connecting portion 80 . A side wall surface 91A of the recessed portion 90 is a surface of the side wall portion 91 facing inward of the recessed portion 90 and surrounds the lower portion of the toilet bowl portion 10 . As shown in FIG. 1, the side wall surface 91A of the recess 90 has a substantially elliptical shape in which the radius of curvature at the front end is smaller than the radius of curvature at the rear end in plan view. A side wall surface 91A of the recess 90 is slightly inclined downward and inward.

The bottom wall portion 93 of the recess 90 is continuous with the lower peripheral edge portion of the side wall portion 91 of the recess 90 . A bottom wall portion 93 of the concave portion 90 is formed with an outflow port 95 communicating with the toilet drainage channel 110 at its rear portion. A bottom wall surface 93</b>A of the recess 90 is a surface facing upward of the bottom wall portion 93 and is slightly inclined downward toward the outflow port 95 .

As shown in FIG. 2 , the toilet drainage channel 110 has an upstream end connected to the lower end of the recess 90 of the toilet bowl 10 and communicates with an outflow port 95 formed in the bottom wall 93 of the recess 90 . The upstream portion of the toilet drainage channel 110 forms a pooled water portion W together with the lower portion of the concave portion 90 of the toilet bowl portion 10 . A downstream end of the toilet drain channel 110 is connected to an upstream end of a drain connecting pipe (not shown). The downstream end of the drain connecting pipe is connected to a drain pipe (not shown) that opens to the floor.

The upper wall portion 120 widens rearward from the rim upper wall portion 23 of the rim portion 20 of the toilet bowl portion 10, as shown in FIGS. The upper wall portion 120 is formed with a pair of toilet seat mounting bolt holes 121 used for mounting a toilet seat device (not shown). An upwardly directed upper wall surface 120A of the upper wall portion 120 extends on the same plane as the rim upper wall surface 23A. Below the upper wall portion 120, a water supply space 150S that accommodates the washing water pipe 150 is formed. The lower surface of the front end of the water supply space 150S communicates with the upper end of the drain channel 150D. The lower end of the drain channel 150D communicates with the inside of the reservoir W. As shown in FIG.

The tank mounting portion 130 is provided behind the upper wall portion 120 . The tank mounting portion 130 mounts a toilet cleaning tank (not shown). The tank mounting portion 130 is formed with a concave portion 90 for arranging the upstream portion of the washing water pipe 150 below the mounted toilet bowl washing tank. The washing water pipe 150 is bifurcated and arranged extending from the tank mounting portion 130 into the water supply space 150S. An inlet 150A formed at the upstream end of the cleaning water pipe 150 opens upward. Two outflow ports 150L and 150R formed at the downstream end of the washing water pipe 150 are opened in the water supply space 150S. An inflow port 150A of the flushing water pipe 150 communicates with a flushing water outflow port of the toilet bowl flushing tank mounted on the tank mounting portion 130 .

The peripheral wall portion 140 has a front peripheral wall portion 140A extending downward from the outer peripheral edge of the rim upper wall portion 23 of the rim portion 20 at the front portion of the toilet bowl 1, and a rear peripheral wall portion 140B extending downward from the upper and lower intermediate portions at the rear portion of the toilet bowl 1 and continuing to the left and right rear edges of the front peripheral wall portion 140A. The front side peripheral wall portion 140A and the rear side peripheral wall portion 140B are in a state in which the lower end surfaces are in contact with the installation surface when the toilet bowl 1 is installed on the installation surface.

As described above, the toilet bowl 1 of Embodiment 1 includes the rim portion 20 having the rim inner wall surface 21A, the bowl portion 60 having the filth receiving surface 60A, and the first connecting portion 40 having the first connecting surface 40A whose upper end is continuous with the lower end of the rim inner wall surface 21A and whose lower end is continuous with the upper end of the filth receiving surface 60A. The first connecting surface 40A in the front region of the first connecting portion 40 has an upper connecting surface 41 continuous with the lower end of the rim inner wall surface 21A and a lower connecting surface 45 continuous with the upper end of the waste receiving surface 60A. The radius of curvature of surface 45 is different.

Since the curvature radius of the lower connection surface 45 is larger than the curvature radius of the upper connection surface 41, the toilet bowl 1 is easy to manufacture, and urine and the like are less likely to scatter outside the toilet bowl 10.例文帳に追加

The first connecting surface 40A of the toilet bowl 1 has an intermediate connecting surface 43 between the upper connecting surface 41 and the lower connecting surface 45. In the vertical cross-sectional shape, the radius of curvature of the intermediate connecting surface 43 is substantially infinite and larger than the radius of curvature of the upper connecting surface 41 and the radius of curvature of the lower connecting surface 45. The toilet bowl 1 has an intermediate connecting surface 43 with a radius of curvature larger than that of the upper connecting surface 41 and the lower connecting surface 45 in the vertical cross-sectional shape, so urine or the like is less likely to scatter outside the toilet bowl 10 .

In the vertical cross-sectional shape, the length of the intermediate connecting surface 43 of this toilet bowl 1 is shorter than the length of the upper connecting surface 41 and the length of the lower connecting surface 45 . This toilet bowl 1 is easy to manufacture by making the length of the intermediate connection surface 43 shorter than the length of the upper connection surface 41 and the length of the lower connection surface 45 in the vertical cross-sectional shape, and urine or the like is less likely to scatter outside the toilet bowl part 10.例文帳に追加

The center portion of the intermediate connection surface 43 having substantially the same length in the vertical cross-sectional shape is provided between a pair of first imaginary straight lines L1 and L1 extending symmetrically in the left and right diagonally forward direction from the center 10C of the toilet bowl portion 10 with respect to the left and right center line CL1 of the toilet bowl portion 10 in plan view. The angle between the pair of first imaginary straight lines L1, L1 is approximately 50 degrees. In the toilet bowl 1 , urine and the like are less likely to scatter outside the toilet bowl 10 due to the central portion of the intermediate connecting surface 43 having substantially the same length in the vertical cross-sectional shape. The angle between the pair of first imaginary straight lines L1, L1 should be 70 degrees or less, more preferably 60 degrees or less. The angle between the pair of first imaginary straight lines L1, L1 should be 30 degrees or more, more preferably 40 degrees or more. The substantially equal length in the vertical cross-sectional shape means that the change in length is within 20%.

In this toilet bowl 1, a first connecting surface 40A having an upper connecting surface 41 and a lower connecting surface 45 is provided between a pair of second imaginary straight lines L2, L2 extending symmetrically in the left-right and diagonally forward direction from the center 10C of the toilet bowl 10 with respect to the left-right center line CL1 of the toilet bowl 10 in plan view. The angle β between the pair of second imaginary straight lines L2, L2 is about 135 degrees. In this toilet bowl 1, in a plan view, urine collides with the filth receiving surface 60A between the pair of second imaginary straight lines L2, L2, and urine and the like are less likely to scatter outside the toilet bowl portion 10.例文帳に追加The angle β between the pair of second imaginary straight lines L2, L2 may be between 80 degrees and 160 degrees, and more preferably between 110 degrees and 150 degrees.

In this toilet bowl 1 , the upper connecting surface 41 and the lower connecting surface 45 extend rearward in the left and right direction beyond the intermediate connecting surface 43 . This toilet bowl 1 is provided with an intermediate connection surface 43 in the right and left central portion of the filth receiving surface 60A where there is a high possibility that urine collides therewith, so that urine or the like is less likely to scatter outside the toilet bowl portion 10.例文帳に追加

In this toilet bowl 1 , the upper connecting surface 41 extends rearward from the left and right beyond the lower connecting surface 45 . This toilet bowl 1 is easy to manufacture, and urine or the like is less likely to scatter outside the toilet bowl portion 10.例文帳に追加

The present disclosure is not limited to the first and second embodiments explained by the above description and drawings, and the technical scope includes, for example, the following embodiments.
(1) In the vertical cross-sectional shape, the radius of curvature of the lower connecting surface may be smaller than the radius of curvature of the upper connecting surface.
(2) There may be no intermediate connecting surface between the upper connecting surface and the lower connecting surface.
(3) The intermediate connecting surface may be a slightly curved curved surface as long as it has a radius of curvature larger than that of the upper connecting surface and that of the lower connecting surface in the vertical cross-sectional shape.
(4) In the vertical cross-sectional shape, the length of the intermediate connecting surface should be shorter than at least one of the length of the upper connecting surface and the length of the lower connecting surface.
(5) The lower connecting surface does not have to extend rearward in the left and right direction beyond the intermediate connecting surface.
(6) In the vertical cross-sectional shape, a portion of the connecting surface of the front region may have a radius of curvature different from that of the upper connecting surface and that of the lower connecting surface.
(7) The rim spout may be formed in the rim inner wall portion on the right side of the lateral center line of the toilet bowl and on the front side of the front-rear center line. In this case, flush water spouted from the rim spout is spouted rearward into the toilet bowl.

REFERENCE SIGNS LIST 1 toilet bowl 10 toilet bowl 10C center (of toilet bowl 10) 20 rim 21A rim inner wall surface 40 first connecting portion (connecting portion) 40A first connecting surface (connecting surface) 41 upper connecting surface 43 intermediate connecting surface 45 lower connecting surface 60 bowl 60A filth receiving surface CL1 left and right center line (of toilet bowl 10) L1 First virtual straight line, L2... Second virtual straight line

Claims (8)

a rim portion having a rim inner wall surface;
a bowl having a dirt receiving surface;
a connecting portion having a connecting surface whose upper end is continuous with the lower end of the rim inner wall surface and whose lower end is continuous with the upper end of the dirt receiving surface;
It is equipped with a toilet bowl part equipped with
The connecting surface of the front region of the connecting portion is
It has an upper connecting surface continuous with the lower end of the rim inner wall surface and a lower connecting surface continuous with the upper end of the waste receiving surface,
At least a part of the connection surface of the front region has a different radius of curvature of the upper connection surface and a curvature radius of the lower connection surface in a vertical cross-sectional shape cut by a vertical plane passing through the center of the toilet bowl portion in plan view. In the vertical cross-sectional shape,
The toilet bowl according to claim 1, wherein the radius of curvature of the lower connecting surface is larger than the radius of curvature of the upper connecting surface. the connecting surface has an intermediate connecting surface between the upper connecting surface and the lower connecting surface;
In the vertical cross-sectional shape,
The toilet bowl according to any one of claims 1 and 2, wherein the radius of curvature of the intermediate connecting surface is larger than the radius of curvature of the upper connecting surface and the radius of curvature of the lower connecting surface. In the vertical cross-sectional shape,
The toilet bowl according to claim 3, wherein the length of the intermediate connecting surface is shorter than at least one of the length of the upper connecting surface and the length of the lower connecting surface. Portions of the intermediate connecting surface having substantially the same length in the vertical cross-sectional shape are:
In a plan view, it is provided between a pair of first imaginary straight lines extending symmetrically from the center of the toilet bowl to the left and right diagonally forward with respect to the left and right center line of the toilet bowl,
The toilet bowl according to any one of claims 3 and 4, wherein the angle between the pair of first imaginary straight lines is 70 degrees or less. The toilet bowl according to any one of claims 3 to 5, wherein the upper connecting surface and the lower connecting surface extend laterally rearward from the intermediate connecting surface. The connecting surface having the upper connecting surface and the lower connecting surface,
In a plan view, it is provided between a pair of second imaginary straight lines extending symmetrically from the center of the toilet bowl to the left and right diagonally forward with respect to the left and right center line of the toilet bowl,
A toilet bowl according to any one of claims 1 to 6, wherein the angle between said pair of second imaginary straight lines is between 80 degrees and 160 degrees. 8. The toilet bowl according to any one of claims 1 to 7, wherein the upper connecting surface extends laterally rearward from the lower connecting surface.

Images