CN107849841B - Water closet - Google Patents

Abstract

A water closet is provided. Comprising: a toilet seat (14); a water discharge part (18) connected to the bottom of the toilet seat (14) for determining a water level of the water (44) stored in the bottom when the water is not flushed; the water jet part is provided with a jet opening (28) formed at the bottom, and forms a water flow in the bottom by jetting washing water from the jet opening (28), and the jet opening (28) is in a mode of spanning the water level (WL1) of the water storage (44) in the non-washing up and down.

Description

Water closet

Technical Field

The present invention relates to toilets.

Background

1. In a toilet seat of a toilet, as an opening for ejecting flush water, an ejection port is formed in addition to a rim water ejection port. The rim water jet port is formed in the rim portion of the toilet seat, and the entire toilet seat is flushed with flush water discharged from the rim water jet port. The jet port is formed at the bottom of the toilet seat, and forms a water flow for promoting the discharge of the filth by the washing water jetted from the jet port.

For example, patent document 1 discloses a toilet bowl having an injection port formed at a position higher than the maximum water level of water stored in the bottom of a toilet bowl seat, and a flushing water supply path for supplying flushing water to the injection port. In this toilet, a spiral flow circling around a horizontal axis is formed by the flush water ejected from the ejection port. The spiral flow can feed dirt into the drain portion (trap), and the dirt can be efficiently discharged.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2008-45276

Disclosure of Invention

Technical problem to be solved by the invention

The inventors studied the structure of patent document 1 and recognized the following problems. In the toilet disclosed in patent document 1, after the toilet is flushed, water remaining in the flush water supply path flows down along the inner surface of the toilet seat from the jet port in a striped pattern (hereinafter, referred to as striped water). The striped water may flow along the inner surface of the toilet seat irregularly, and may flow down over a long period of time, which may cause deterioration of the appearance.

The first invention has been made in view of such a problem, and an object thereof is to provide a toilet capable of preventing deterioration of the appearance in a toilet seat due to flushing of a toilet.

2. In a toilet seat of a toilet, a jet hole is sometimes formed as an opening for ejecting flush water in addition to a rim water jet. The rim water jet hole is formed in the rim portion of the toilet seat, and the entire toilet seat is flushed with flush water discharged from the rim water jet hole. The jet holes are formed in the bottom of the toilet seat, and the jet holes form a water flow for promoting discharge of waste by using flush water jetted from the jet holes.

For example, fig. 1 of patent document 1 discloses a toilet stool in which a rim water passage is formed on the outer peripheral side of a rim portion and a jet communication passage branched from a middle position of the rim water passage is formed. In this toilet, flush water supplied to the rim water passage is ejected from the rim water injection hole and is ejected from the injection hole via the injection communication passage.

However, in the toilet disclosed in patent document 1, a water inlet of the jet communication passage is opened at a position in the middle of a path from the start end side to the end side of the rim water passage. Therefore, the flush water in the rim water passage can easily flow to the rim water hole without changing the flow direction to the jet communication passage. Therefore, it is difficult to introduce the flush water from the rim water passage into the jet communication passage, and the flush water jetted from the jet hole has a weak water force.

To improve this, as shown in fig. 5 of patent document 1, the following configuration can be considered: two right and left edge water passages are formed on the outer peripheral side of the edge portion, one edge water passage is provided with an edge water spray hole, and the other edge water passage is communicated with the spray communication passage.

Here, in order to increase the degree of freedom of the flushing system, a plurality of rim water spray holes may be formed in the rim portion, and flush water supplied to each of the two rim water passages may be discharged from each of the rim water spray holes. The toilet of patent document 1 has only a single edge spout hole at the edge portion, and does not assume a case where there are a plurality of edge spout holes. The toilet of patent document 1 does not consider that flush water is strongly ejected from the ejection holes while providing such a plurality of rim water ejection holes.

The second invention has been made in view of the above problems, and an object thereof is to provide a toilet bowl which ejects flush water from rim water spray holes through left and right rim water passages and vigorously ejects flush water from the ejection holes.

Means for solving the problems

A first mode of the first invention for solving the above problems is a toilet bowl. A toilet bowl is provided with: a toilet seat; a water discharge part connected to the bottom of the toilet seat part for determining a water level of the water stored in the bottom when the water is not flushed; and a water jet unit having a jet port formed in the bottom portion and a jet water supply path for supplying washing water to the jet port, wherein the jet port forms a water flow in the bottom portion by jetting the washing water from the jet port, and the jet port is formed so as to extend vertically over a water level of the stored water during non-washing. The term "non-flushing time" as used herein means a time in a standby state before flushing of the toilet seat is started.

According to this aspect, the lower portion of the ejection opening is submerged by the water stored during non-flushing. Therefore, after the toilet is flushed, the water discharged from the discharge port is easily merged with the stored water without passing through the inner surface of the toilet seat. Therefore, after the toilet is flushed, the strip-shaped water is prevented from flowing down from the jet port to the inner surface of the toilet seat, and the appearance of the toilet seat can be prevented from being degraded due to flushing of the toilet.

A first mode of the second invention for solving the above problems is a toilet bowl. A toilet bowl is provided with: a toilet seat having an edge formed at an upper end thereof; a first edge water passage formed on an outer peripheral side of the edge portion and located on one of left and right sides of the toilet main body; a second rim water passage formed on the outer peripheral side of the rim and located on the other of the left and right sides of the toilet main body; a first rim water spray hole for spraying water from inside the first rim water passage into the toilet seat; a second rim spout hole for spraying water from within the second rim waterway into the toilet seat; a discharge hole formed in a bottom portion of the toilet seat or a drain passage portion connected to the bottom portion; and a communication passage that communicates the first edge water passage and the discharge hole, wherein the first edge water spray hole is branched from a middle position of a passage from a start end side to a final end side of the first edge water passage, and a water inlet of the communication passage is opened at the final end side of the first edge water passage with respect to the first edge water spray hole.

According to this aspect, the flush water flowing into the terminal end portion of the first edge water passage can be easily introduced into the water inlet located in the vicinity thereof by changing the flow direction thereof only from then on. Therefore, the washing water can be easily sucked into the communication path from the first edge water passage, and the washing water with high water pressure can be easily ejected from the ejection hole. As a result, the washing water is supplied to the left and right rim water passages, and the washing water is discharged from the plurality of rim water spray holes, and the washing water is vigorously discharged from the discharge holes.

Drawings

Fig. 1 is a plan view of a toilet bowl of a first embodiment.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a sectional view taken along line B-B of fig. 2.

Fig. 4 is a view showing a section of a line C-C of the toilet seat of fig. 2.

Fig. 5 is a schematic diagram showing a flow pattern of flush water in the jet water supply passage according to the first embodiment, where fig. 5 (a) shows a state before the toilet bowl starts to be flushed, and fig. 5 (b) shows a state during flushing of the toilet bowl.

Fig. 6 is a schematic diagram showing a flow pattern of flush water in the injection water supply passage according to the first modification, in which fig. 6 (a) shows a state before the toilet bowl starts to be flushed, fig. 6 (b) shows a state during flushing of the toilet bowl, and fig. 6 (c) shows a state of the process after the flushing.

Fig. 7 is a view schematically showing a slope formed on the inner bottom surface of the edge water passage according to the first embodiment.

Fig. 8 is a diagram showing a flow pattern of flush water in the toilet seat according to the first embodiment.

Fig. 9 is a schematic diagram of a state in which the washing water ejected from the rim water ejection port splashes before the washing water is ejected from the ejection port.

FIG. 10 is a schematic view showing a change mode of the water level of the stored water in the toilet seat of the first embodiment.

Fig. 11 is a plan view of the toilet bowl of the second embodiment.

Fig. 12 is a sectional view taken along line a-a of fig. 11.

Fig. 13 is a sectional view taken along line B-B of fig. 12.

Fig. 14 is an enlarged view of the left edge water passage of fig. 13.

FIG. 15 is a cross-sectional view taken along line D-D of FIG. 14

Fig. 16 is a cross-sectional view taken along line E-E of fig. 14.

Fig. 17 is a view schematically showing slopes formed on the inner bottom surface of each edge water passage according to the second embodiment.

Fig. 18 (a) is a diagram showing a left edge water passage according to the first modification, and fig. 18 (b) is an explanatory diagram of the throttle portion.

Fig. 19 is an explanatory diagram of the throttle portion of fig. 15.

Fig. 20 is a view showing a throttle portion according to a second modification.

Detailed Description

In the following embodiments and modifications, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. In the drawings, some of the constituent elements are omitted as appropriate for convenience of description.

1. Preferred embodiments of the first invention will be described.

Fig. 1 is a plan view of a toilet bowl 10 of a first embodiment.

The toilet bowl 10 includes a toilet body 12 made of pottery. The toilet main body 12 is a wall-mounted toilet mounted in a suspended state on a side wall surface 100 of a toilet.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

As shown in fig. 1, the toilet main body 12 includes a toilet seat 14 formed at a front portion of the toilet main body 12, and a drain portion (trap)18 connected to a bottom portion of the toilet seat 14. The drain portion 18 communicates with the inside of the toilet seat 14 via an inlet 16 (see fig. 1) formed in the bottom of the toilet seat 14.

Fig. 3 is a sectional view taken along line B-B of fig. 2.

As shown in fig. 2 and 3, the toilet seat 14 includes: a basin-shaped receiving face portion 20 for receiving dirt; a recessed portion 22 formed to be recessed downward from a lower edge portion of the receiving surface portion 20 and forming a bottom portion of the toilet seat 14; a rim portion 24 that is connected to an upper edge portion of the receiving surface portion 20 and forms an upper end portion of the toilet seat 14. The receiving surface portion 20 is formed in an elliptical shape having a front-rear dimension larger than a left-right dimension in a plan view. The concave portion 22 is formed in a bottomed cylindrical shape, and the inlet 16 of the drain portion 18 is opened at a bottom surface portion thereof.

As shown in fig. 3, the toilet main body 12 further includes a jet unit 26 for jetting flush water into the toilet seat 14. The water jet part 26 has a jet port 28 formed in the recess 22 of the toilet seat 14 and two rim water jet ports 30A and 30B formed in the rim 24 of the toilet seat 14. The water jet unit 26 jets washing water from the jet port 28 to form a water flow for promoting discharge of waste in the recessed portion 22 of the toilet seat 14. The water jet part 26 jets out flush water from the two rim water jets 30A and 30B to form a water flow for flushing the inner surface of the toilet seat 14. The toilet 10 has one main feature in the water jet section 26, particularly in the jet port 28, but will be described first from the peripheral configuration.

As shown in fig. 2, the drain portion 18 includes a first water channel portion 32, a second water channel portion 34, and a third water channel portion 36 in this order from the upstream side to the downstream side. First water channel 32 is formed to descend from inlet 16 of drain 18. The second water channel portion 34 is formed so that an upstream end portion thereof is connected to a downstream end portion of the first water channel portion 32 at the rear and rises from the upstream end portion thereof. The third water channel 36 is formed so that an upstream end is connected to a downstream end of the second water channel 34 in the rear direction and extends rearward from the upstream end. A drain pipe 102 is connected to a downstream end portion of the third water channel portion 36, and the sewage is discharged to the sewer-side water channel via the inside of the drain portion 18 and the drain pipe 102.

In the drain portion 18, the seal water 38 that blocks the flow of air in the water passage direction is accumulated in the first water passage portion 32 and the second water passage portion 34. The back flow of odor from the waterway of the sewer side is prevented by the water seal 38. A bent portion 40 for changing the direction of water flow passing through the inside is formed at the boundary between the second water channel portion 34 and the third water channel portion 36. An upper end edge 42 of the inner wall surface disposed inside the bend of the bend portion 40 serves as an overflow edge (hereinafter referred to as "overflow edge 42") that determines the water level of the seal water 38 in the drain portion 18 during non-flushing. The term "non-flushing time" as used herein means a time in a standby state before flushing of the toilet seat 14 is started. When the water seal 38 in the drain portion 18 exceeds the overflow edge 42, the water seal 38 in the drain portion 18 overflows downstream from the overflow edge 42.

A part of the seal water 38 in the drain portion 18 is stored as a water storage 44 at the bottom of the toilet seat 14. As with the seal water 38, the water level WL1 (hereinafter referred to as the initial water level WL1) of the stored water 44 during non-flushing is determined in accordance with the position of the overflow edge 42 in the vertical direction.

As shown in fig. 3, two rim water conduits 48 are formed in the rim portion 24 so as to extend from the two rim water outlets 30A and 30B to one side (counterclockwise in the drawing) in the circumferential direction of the toilet seat 14. The rim water conduit 48 guides the washing water discharged from the rim water outlets 30A and 30B to spiral, and thereby serves to bring the washing water from the starting end position to the ending end position of the rim water conduit 48.

The water jet unit 26 includes an inlet 54, a right edge water passage 56A (first water passage), a left edge water passage 56B (second water passage), and a jet water supply passage 58, in addition to the jet port 28 and the two edge water jet ports 30A and 30B. The details of the ejection port 28 will be described later, and other structures will be explained first.

The two edge jets 30A, 30B include a right edge jet 30A (first jet) and a left edge jet 30B (second jet). As shown in fig. 1, the right edge water jet 30A is located on the right side with respect to the left and right center lines CL of the toilet main body 12 and is disposed at an intermediate position in the front-rear direction of the toilet seat 14. The left rim water jet 30B is located on the left side with respect to the left and right center lines CL of the toilet main body 12 and is disposed at the rear of the toilet seat 14. The left-right center line CL herein refers to a straight line that bisects the left-right dimension of the outer surface portion of the toilet main body 12 and extends in the front-rear direction. Flush water is ejected from the two rim water outlets 30A and 30B along the inner peripheral surface of the rim 24 to one side in the circumferential direction.

As shown in fig. 2, flush water supplied from a water supply pipe 104a, which is a part of the flush water supply device 104, flows into the inlet 54. Fig. 3 shows a water passage Wp of the washing water flowing from the water supply pipe 104a into the water jet unit 26 through the inlet 54.

The right edge water passage 56A and the left edge water passage 56B are used to branch and flow the washing water flowing in from the inflow port 54. The washing water flowing through the right edge water passage 56A is supplied to the right edge water jet 30A, and the washing water flowing through the left edge water passage 56B is supplied to the left edge water jet 30B. A branching position 60 at which the right edge water passage 56A and the left edge water passage 56B branch off is disposed rearward and rearward of the edge portion.

The right edge water passage 56A is formed to extend from the branch position 60 to one side in the circumferential direction (counterclockwise direction) on the back side of the edge portion 24. A right edge water jet 30A is formed at the downstream end of the right edge water passage 56A.

The left edge water passage 56B is formed to extend from the branch position 60 to the other side (clockwise direction) in the circumferential direction on the back side of the edge portion 24. The left edge water passage 56B is formed so that the front end in the extending direction ends. A branch water passage 62 is formed at a middle position of the left edge water passage 56B so as to extend radially inward to one side in the circumferential direction (counterclockwise direction). A left edge spout 30B is formed at the downstream end of the branch waterway 62.

As shown in fig. 2 and 3, the injection water supply passage 58 is connected to the front end of the left edge water passage 56B. The injection water supply path 58 supplies flush water to the injection port 28. An inlet 64 for introducing flush water into the jet water supply passage 58 is formed in the inner bottom surface of the left edge water passage 56B. The injection water supply passage 58 is formed so as to connect the introduction port 64 and the injection port 28. Specifically, the water supply path for injection 58 has a first portion 58a extending downward from the introduction port 64, and a second portion 58b extending while being bent downward from a downstream end of the first portion 58a to the other side in the circumferential direction (clockwise direction in the present figure). The second portion 58b extends while curving from the inner side of the side portion of the toilet seat 14 to the inner side of the jet port 28. The injection water supply passage 58 further includes a third portion 58c extending rearward from the downstream end of the second portion 58b toward the injection port 28.

The jet port 28 is formed on the wall surface at the left side and the front side of the recess 22 of the toilet seat 14. The flush water is ejected from the ejection port 28 toward the recess 22 of the toilet seat 14 in one circumferential direction (clockwise direction) in the same direction as the ejection direction of the flush water from the two rim water ejection ports 30A and 30B. The washing water is ejected from the ejection port 28 in the horizontal direction. The "in the horizontal direction" herein includes both a case where the ejection direction of the washing water is parallel to the horizontal plane and a case where it is substantially parallel.

Fig. 4 is a view showing a cross section of a line C-C of the toilet seat 14 of fig. 2.

As shown in fig. 2 and 4, the ejection port 28 is formed to cross the initial water level WL1 of the water storage 44 up and down. The upper portion of the injection port 28 is arranged above the initial water level WL1 of the stored water 44, and communicates the inside of the injection water supply passage 58 with the air space in the toilet seat 14 through the inside thereof. The lower portion of the injection port 28 is disposed below the initial water level WL1 of the stored water 44, and is submerged in the stored water 44. Specifically, the lower edge 28a of the ejection port 28 is arranged at the lower side than the initial water level WL 1. The lower edge 28a is a portion of the injection port 28 on a lower side perpendicular to the water level passing through the injection port 28.

The above effects of the toilet bowl 10 are explained.

(1) The jet port 28 of the toilet bowl 10 is formed to extend above and below the initial water level WL1 of the water storage 44, and the lower part thereof is submerged in the water storage 44 of the initial water level. Thus, after the toilet is flushed, water such as makeup water and residual water that reach the injection port 28 via the injection water supply passage 58 does not reach the inner surface of the toilet seat 14 and merges into the stored water 44. Therefore, the flow of the striped water along the inner surface of the toilet seat 14 from the jet port 28 after the toilet is flushed can be suppressed, and the deterioration of the appearance inside the toilet seat 14 due to the toilet flushing can be prevented. The term "makeup water" as used herein refers to water supplied to flush the toilet bowl, after the stored water 44 is discharged through the drain portion 18, to store the stored water 44 to the initial water level WL 1. The "residual water" is water remaining in the rim water passages 56A and 56B and the jet water supply passage 58 after the supply of the flush water from the flush water supply device 104 is completed.

If the striped water flows down from the jet port 28 along the inner surface of the toilet seat 14, a part of the striped water may remain attached to the inner surface of the toilet seat 14. In this case, depending on the quality of water adhering to the inner surface of the toilet seat 14, stains are generated at the adhering position after the water evaporates. In this regard, according to the present embodiment, the streak water is prevented from flowing down from the jet port 28 to the inner surface of the toilet seat 14, and the stain on the inner surface of the toilet seat 14 due to the remaining streak water is prevented, so that the deterioration of the appearance inside the toilet seat 14 due to the flushing of the toilet can be effectively prevented. Further, by suppressing stain on the inner surface of the toilet seat 14 due to the remaining of the striped water, the inside of the toilet seat 14 can be kept clean.

The injection port 28 is formed to extend above and below the initial water level WL1 of the water storage 44, and the injection water supply passage 58 and the air space in the toilet seat 14 are communicated with each other through the inside of the upper portion of the injection port 28. Illustrating the advantages thereof.

Fig. 5 is a schematic diagram showing the flow pattern of the washing water in the injection water supply path 58. Fig. 5 (a) shows a state before the toilet bowl starts to be flushed. In this figure, for convenience of explanation, the position, size, and shape of the toilet seat 14, the drain portion 18, the injection water supply path 58, and the like are shown to be different from those in other figures.

When the washing water W is supplied to the left edge water passage 56B, as shown in fig. 5 (B), the washing water flows into the jet water supply passage 58 from the inlet 64, and the washing water gradually fills the inlet 64 side of the jet water supply passage 58. The washing water W flows into the injection water supply passage 58, and the air in the injection water supply passage 58 is pushed toward the injection port 28 (see direction Pa) by the washing water W. At this time, as described above, the air space in the injection water supply path 58 is in communication with the air space in the toilet seat 14 through the inside of the upper portion of the injection port 28, and therefore the air in the injection water supply path 58 is smoothly discharged through the inside of the injection port 28 (see the direction Pb). If the entire ejection port 28 is submerged in the water reservoir 44, the air in the ejection water supply passage 58 is ejected from the ejection port 28 in a bubble state, and therefore, a popping sound of the bubble occurs, giving a user a sense of discomfort. In this regard, according to the present embodiment, when the toilet is flushed, the bubbles can be prevented from being ejected from the ejection port 28, so that the generation of a popping sound of the bubbles can be prevented, and the silencing of the toilet flushing operation can be achieved. In addition, by preventing the air bubbles from being ejected from the ejection port 28, it is possible to prevent the user from feeling uncomfortable in appearance.

Next, other features of the toilet 10 will be described.

As shown in fig. 5 (a), the injection water supply passage 58 has an air space 66 which is continuous during non-flushing in a range from the inlet 64 through which flush water flows into the left edge water passage 56B to the injection port 28. The "atmospheric space 66" herein refers to a space filled with the atmosphere. This means that, in this range, no sealing water is accumulated in a part of the injection water supply passage 58 to shut off the air flow in the water passage direction. Illustrating the advantages thereof.

Fig. 6 is a schematic diagram showing a flow pattern of the washing water in the injection water supply path 58 of the modification.

It is conceivable to form the seal water 68 in the injection water supply path 58 as shown in fig. 6 (a). In this case, the upstream air 70 and the downstream air 72 divided by the sealing water 68 are present in the injection water supply passage 58. When the flush water flows into the injection water supply passage 58 from the left edge water passage 56B in this state, the upstream air 70 is pushed out in the direction Pc together with the seal water 68 as shown in fig. 6 (B). As a result, the seal water 68 merges with the water reservoir 44 in the bottom portion of the toilet seat 14, and as shown in fig. 6 (c), the water reservoir 44 may rise from the initial water level WL1 until the ejection port 28 is submerged (see direction Pd) in a state where air remains in the ejection water supply path 58. In this case, the air remaining in the air bubbles may be discharged from the ejection port 28 (see the direction Pe) in a bubble-like state, and a bubble-breaking sound may be generated.

On the other hand, according to the above configuration, the water level of the stored water 44 can be prevented from rising due to the confluence of the seal water 68 and the stored water 44 without forming the seal water 68 in the injection water supply path 58. Therefore, by flooding the entire ejection port 28 with air remaining in the ejection water supply passage 58, it is possible to prevent air bubbles from being discharged from the ejection port 28, and it is possible to effectively prevent the generation of a popping sound of the air bubbles.

In the toilet bowl 10 of the present embodiment, the injection port 28 is formed to extend above and below the initial water level WL1 of the water storage 44, and therefore the operational effect described in the above (1) is obtained.

Next, a description will be given of a configuration for preventing the streak water from flowing from the edge water jet ports 30A and 30B, not from the jet port 28.

Fig. 7 is a schematic view showing slopes formed on the inner bottom surfaces of the edge water passages 56A and 56B. The slope from the high position to the low position is indicated by an arrow in this figure.

The inner bottom surfaces of the edge water passage channels 56A and 56B are provided with slopes that incline downward from the edge water discharge ports 30A and 30B toward the inside. Specifically, a first slope 74 is provided on the inner bottom surface of the right edge water passage 56A, the right edge water jet 30A being at a high position, and the branching position 60 side being a branching point between the right edge water passage 56A and the left edge water passage 56B being at a low position. The first slope 74 is provided in such a manner as to slope downward toward the inside with the water jet 30A from the right edge.

Further, a second slope 76 is provided on the inner bottom surface of the left edge water passage 56B, the branch position 60 side being a high position and the introduction port 64 of the water supply passage 58 being a low position. The second slope 76 is provided in such a manner as to slope downward toward the inside with the water jet 30B from the left edge. Further, a third slope 78 is provided on the inner bottom surface of the left edge water passage 56B, in which the leading end position 56Ba as the end point is at the high position and the introduction port 64 of the water supply passage for injection 58 is at the low position. A recess 80 that is recessed downward is formed at the branching position 60 of each of the edge water passages 56A and 56B.

The advantages of the above constitution are explained. It is conceivable that the water level in the rim water passages 56A and 56B is lowered to the vicinity of the lower edges of the rim water outlets 30A and 30B when the supply of flush water from the flush water supply device 104 is completed. In this case, water such as residual water or makeup water on the inner bottom surfaces of the edge water passages 56A and 56B easily flows in a direction away from the edge water discharge ports 30A and 30B by the own weight of the water due to the first slope 74 and the second slope 76. That is, the water on the inner bottom surfaces of the rim water passages 56A and 56B is less likely to approach the rim water discharge ports 30A and 30B, and is less likely to flow into the toilet seat 14 through the rim water discharge ports 30A and 30B. Thus, when the water level in each of the rim water passages 56A, 56B drops as in the above-described case, the streak water can be prevented from flowing down along the inner surface of the toilet seat 14 from each of the rim water outlets 30A, 30, and the appearance of the interior of the toilet seat 14 can be effectively prevented from being deteriorated by the toilet bowl being flushed.

At least a part of the introduction port 64 of the water supply path for spraying 58 is disposed at a position lower than the edge water discharge ports 30A and 30B. The entire introduction port 64 of the present embodiment is disposed at a position lower than the edge water jet ports 30A and 30B. From another point of view, at least a part of the introduction port 64 is disposed at a position lower than the highest position of the inner bottom surface having the first slope 74 and the second slope 76. The entire introduction port 64 of the present embodiment is disposed at a position lower than the highest position of the inner bottom surface having the first slope 74 and the second slope 76. More specifically, the introduction port 64 is disposed at a lower side than the lowest position of the inner bottom surface having the first slope 74, and at the same position as the lowest position of the inner bottom surface having the second slope 76.

Therefore, in the process of lowering the water level in the edge water passages 56A and 56B, the water on the inner bottom surfaces of the edge water passages 56A and 56B can be easily introduced into the introduction port 64 of the injection water supply passage 58 by its own weight by the first slope 74 and the second slope 76. Therefore, the water on the inner bottom surfaces of the rim water passages 56A and 56B can be discharged through the jet water supply passage 58, and the amount of water flowing into the toilet seat 14 through the rim water discharge ports 30A and 30B can be easily reduced. As a result, in the process of the water level in the rim water passage 56A, 56B being lowered, the strip water can be more effectively prevented from flowing down from the rim water discharge ports 30A, 30B along the inner surface of the toilet seat 14, and the appearance of the toilet seat 14 can be more effectively prevented from being deteriorated by the flush toilet.

Next, a flushing method using the toilet seat 14 of the toilet bowl 10 described above will be described with reference to fig. 8.

The toilet bowl 10 flushes the inside of the toilet bowl 14 by a so-called wash-down flushing method in which the inside of the toilet bowl 14 is flushed with the waste in the drain portion 18 by a fall of water. The flush water is supplied from the flush water supply device 104 into the spout portion 26 of the toilet bowl 10 within a predetermined flow rate range by operation of an operation member such as a switch or lever for starting supply of flush water. Hereinafter, the operation from the start of the supply of the washing water within the predetermined flow rate range to the end thereof will be described as a single washing operation. In the present embodiment, the flush water supply device 104 supplies flush water by a tap water direct-pressure type water supply method using the supply pressure of tap water.

The washing water supplied from the washing water supply device 104 flows into the water jet unit 26 through the inlet 54. The flush water flowing into the water jet unit 26 flows through the right edge water passage 56A, the left edge water passage 56B, and the jet water supply passage 58 (not shown), and is ejected from the jet port 28 and the edge water jet ports 30A and 30B, respectively.

The flush water ejected from the ejection port 28 forms a spiral flow Dwa that spirals in one circumferential direction (counterclockwise direction) in the recess 22 of the toilet seat 14. The spiral flow Dwa is used to wash the inner surface of the recess 22 and concentrate the dirt within the recess 22 at the center of the spiral.

The rim water jet ports 30A and 30B jet flush water to one side in the circumferential direction along the inner circumferential surface of the rim 24, thereby forming a spiral flow Dwb that spirals in one side in the circumferential direction in the toilet seat 14. The rim portion 24 and the receiving surface portion 20 of the toilet seat 14 are flushed by the spiral flow Dwb. A part of the washing water forming the disk swirling flow Dwb on the receiving surface portion 20 swirls downward to form a water flow Dwc flowing from above the receiving surface portion 20 through the inside of the concave portion 22 to the inlet 16 of the drain portion 18. The waste in the recess 22 of the toilet seat 14 is flushed into the drain 18 through the inlet 16 by the water flow Dwc. In particular, the dirt collected at the center of the spiral by the aforementioned disc swirling flow Dwa is washed away, enabling the dirt to be efficiently discharged.

Here, a flow pattern of the washing water in the injection water supply path 58 may be considered. As shown in fig. 5 (b), the washing water flowing into the injection water supply path 58 flows while pushing the air in the injection water supply path 58 toward the injection port 28, and starts to be ejected from the injection port 28 at the time when the washing water reaches the injection port 28. Thus, as shown in fig. 9, when the entire injection port 28 is submerged before the flush water is injected from the injection port 28, the air pushed out by the flush water remains in the injection water supply passage 58. In this case, the air in the injection water supply passage 58 is discharged from the injection port 28 in a bubble state (see the direction Pf), and a popping sound of the bubbles is generated in the toilet seat 14. This situation may occur as follows: before the flush water is ejected from the ejection port 28, the stored water 44 rises to the initial water level WL1 due to the flush water ejected from the rim water ejection ports 30A and 30B.

Therefore, the toilet seat 14 and the spout 26 of the present embodiment are configured such that after the flush water is spouted from the spout 28, the flush water spouted from the rim spouts 30A and 30B splashes and falls on the water reservoir 44. From another point of view, the toilet seat 14 and the jet unit 26 are configured such that the air in the jet water supply passage 58 is pushed out through the jet port 28 by the flush water flowing into the jet water supply passage 58 from the inlet 64, and then the flush water discharged from the rim water outlets 30A and 30B is splashed onto the water reservoir 44. Thereby preventing the following: before the air in the jet water supply passage 58 is pushed out by the flush water, the flush water ejected from the rim water jet ports 30A and 30B splashes down on the water pool 44, and the water level of the water pool 44 rises to flood the entire jet port 28 with water. As a result, the entire ejection port 28 is submerged in water in a state where air remains in the injection water supply passage 58, and thus, it is possible to prevent air bubbles from being discharged from the ejection port 28, and it is possible to effectively prevent the generation of a popping sound of the air bubbles.

With this configuration, the length of the water passage from the inlet 54 to the edge water jet ports 30A and 30B of the water jet unit 26, the length of the water passage of the jet water supply passage 58, the passage cross-sectional area of the water passages 56A, 56B, and 58, and the like are adjusted. Further, with this configuration, the radius of curvature of the toilet seat 14 in a plan view, the inclination of each portion, and the like are adjusted. In order to eject the washing water from the ejection port 28 early, the length of the water passage path of the injection water supply path 58 is shortened, and the passage cross-sectional area of the injection water supply path 58 is adjusted to be small so that the washing water reaches the ejection port 28 early. In order to delay the time when the flush water discharged from the rim water outlets 30A and 30B (hereinafter, referred to as rim flush water) splashes down onto the water trap 44, the length of the water passage from the inlet 54 to the rim water outlets 30A and 30B is increased, the radius of curvature of the toilet seat 14 in a plan view is increased, and the local inclination is reduced.

From another viewpoint, the toilet seat 14 and the water jet part 26 may be configured such that the entire jet port 28 is submerged in water after the air in the jet water supply passage 58 is exhausted from the jet port 28 and is completed. This also prevents the water level of the water pool 44 from rising to flood the entire discharge port 28 before the air in the discharge water supply passage 58 is pushed out by the flush water.

In such a configuration, it is necessary to satisfy the condition that the water level of the stored water 44 does not rise until the entire injection port 28 is submerged by water before the air in the injection water supply passage 58 is discharged from the injection port 28 and is completed. Such a rise in the water level of the water spot 44 is caused by the rim wash water splashing down to the water spot 44. Therefore, in order to satisfy the above-described conditions, the water jet unit 26 and the toilet seat unit 14 may be configured so that (a) flush water is ejected from the ejection port 28 early and (B) the timing at which rim flush water splashes onto the water pool 44 is delayed, as described above. The reason for the condition (a) is that, if the flush water is ejected from the ejection port 28 earlier, the timing at which the air in the injection water supply passage 58 is discharged and ended can be advanced accordingly.

As shown in fig. 10, when the toilet is flushed, the water 44 in the recess 22 of the toilet seat 14 rises from the initial water level WL1 to the water level WL2 (see fig. 2 and 4) due to the flush water ejected from the ejection port 28 and the rim water ejection ports 30A and 30B. When at this water level WL2, the entire injection port 28 is submerged. The supply amount of the washing water supplied from the washing water supply device 104 is adjusted so as to be the water level WL 2.

The first invention has been described above based on the embodiments, but the embodiments merely illustrate the principle and application of the first invention. In addition, various modifications and arrangements may be made to the embodiments without departing from the scope of the first invention defined in the claims.

Although the flush toilet 10 has been described using the wash-down type as the flush method, the interior of the toilet seat 14 may be flushed by combining a flush method of another method such as the siphon type. Although the toilet bowl 10 has been described using a direct-pressure type of tap water as the water supply system, other water supply systems such as a gravity water supply system using gravity may be used. The toilet main body 12 has been described by taking a wall-mounted toilet as an example, but may be a floor-mounted toilet installed on the floor of a toilet. The toilet body 12 may be made of a material such as resin, in addition to ceramics.

The inlet 16 of the drain portion 18 is opened to the bottom surface of the bottom portion (the concave portion 22) of the toilet seat 14, but may be opened to the side surface of the bottom portion.

The example in which the ejection port 28 is formed on the left side and the front side wall surface of the recess 22 has been described, but the position is not limited to this. In addition, an example in which the water jet part 26 is configured to form a disk swirling flow circling one side in the circumferential direction in the bottom of the toilet seat 14 by jetting the washing water from the jet port 28 is described. The flow formed by the flush water ejected from the ejection port 28 is not limited to this, and may be formed, for example, as a flow directed toward the back side of the drain 18 through the inlet 16 of the drain 18. In short, a water flow promoting the discharge of the contaminants through the drainage portion 18 may be formed.

In addition, when the vertical dimension of the injection port 28 is La, the injection port 28 may be disposed below the initial water level WL1 of the water storage 44 in a range of 1/4 or more and 3/4 or less with respect to the vertical dimension La.

The edge water jet ports 30A and 30B are described as an example of a water jet port for jetting flush water into the toilet seat 14. The water jet may not be formed in the edge portion 24, and may be formed in a hot water flushing device attached to the toilet main body 12. Further, although the example in which the two edge water discharge ports 30A and 30B are formed in the edge portion 24 has been described, only one edge water discharge port may be formed in the edge portion 24, or three or more edge water discharge ports may be formed. In addition, an example in which the rim water jet ports 30A and 30B jet flush water to one side in the circumferential direction along the inner circumferential surface of the rim 24 is described. The water jet port formed in the rim 24 may be any port for jetting the flush water into the toilet seat 14, and the jetting direction of the flush water is not limited to this. For example, the washing water may be ejected downward.

Further, the left edge water passage 56B and the right edge water passage 56A are formed on the back side of the rim 24, but may be formed only on either side.

In addition, an example in which the inlet 64 of the water supply passage for injection 58 is formed on the inner bottom surface of the left edge water passage 56B is described. When the inlet 64 is formed in the inner wall surface of the water passage for supplying flush water to the water jet, it may be formed in the inner side surface of the left edge water passage 56B, or may be formed in the inner bottom surface or the inner side surface of the right edge water passage 56A.

When the invention embodied by the above embodiments and modifications is generalized, the following technical idea is derived.

In the toilet bowl according to the second aspect of the first aspect of the present invention, in the first aspect, the entire ejection opening may be submerged in water after the air in the ejection water supply path is exhausted from the ejection opening and is completed.

According to this aspect, the water level of the stored water is prevented from rising and the entire ejection opening is prevented from being flooded with water until the end of pushing out the air in the injection water supply path with the flush water. As a result, the entire injection port is submerged in water in a state where air remains in the injection water supply passage, and bubbles can be prevented from being ejected from the injection port, and the generation of a popping sound of bubbles can be effectively prevented.

A toilet bowl according to a third aspect of the first invention may be configured such that, in the first aspect, the water jet unit has a water jet port for jetting the flush water into the toilet seat, and the toilet seat and the water jet unit splash the flush water jetted from the rim water jet port onto the water storage after the flush water is jetted from the jet port.

According to this aspect, before the air in the injection water supply passage is completely pushed out by the flush water, the flush water discharged from the rim water discharge port is prevented from splashing down to the stored water, and the water level of the stored water rises to cause the entire injection port to be submerged in the water. As a result, the entire injection port is submerged in water in a state where air remains in the injection water supply passage, so that bubbles can be prevented from being ejected from the injection port, and the generation of a popping sound of bubbles can be effectively prevented.

A toilet bowl according to a fourth aspect of the first invention may be configured such that, in any one of the first to third aspects, the jet water supply passage has an air space that is continuous in a non-flushing state in a range from the inlet port through which the flush water is introduced to the jet port.

If a water seal is formed in the injection water supply path to block the flow of air in the water flow direction, if flush water flows in from the inlet of the injection water supply path, air between the inlet and the water seal is pushed out together with the water seal, and the water seal merges with each other in the stored water, causing the stored water to rise from the water level at the time of non-flushing. This may cause air in the injection water supply passage to be discharged from the injection port in the form of bubbles, thereby generating a popping sound of the bubbles.

According to this aspect, since no seal water is formed in the injection water supply passage, the seal water in the injection water supply passage and the stored water can be prevented from merging and causing the water level of the stored water to rise. Thus, the entire injection port is submerged in water in a state where air remains in the injection water supply passage, and bubbles can be prevented from being ejected from the injection port, and the generation of a popping sound of bubbles can be effectively prevented.

A toilet bowl according to a fifth aspect of the first invention may be the toilet bowl according to any one of the first to fourth aspects, wherein the toilet seat has an edge portion forming an upper end portion of the toilet seat, and the water spray portion includes: and an edge water passage formed on the back side of the edge portion and configured to supply flush water to the edge water jet, wherein a slope descending from the edge water jet to the inside is provided on the inner bottom surface of the edge water passage.

The water level in the water passage may be lowered to the vicinity of the lower edge of the edge water spout. According to this aspect, in this situation, the water on the inner bottom surface of the edge water passage easily flows in a direction away from the edge water spout by its own weight due to the slope of the inner bottom surface. That is, water on the inner bottom surface of the rim water passage is not likely to approach the rim water spout and is unlikely to flow into the toilet seat through the rim water spout. Thus, as in the above-described case, when the water level in the rim water passage drops, the streak water can be prevented from flowing down from the rim water discharge port onto the inner surface of the toilet seat, and the deterioration of the appearance in the toilet seat due to the flushing of the toilet can be effectively prevented.

A toilet bowl according to a sixth aspect of the first invention may be such that, in the fifth aspect, an introduction port for introducing flush water into the jet water supply passage is formed in an inner wall surface of the rim water passage, and at least a part of the introduction port is disposed at a position lower than the rim water jet port.

According to this aspect, in the process of gradually lowering the water level in the rim water passage, the water on the inner bottom surface of the rim water passage is easily guided to the inlet of the jetting water supply passage by the self-weight of the slope. This makes it possible to discharge water on the inner bottom surface of the rim water passage through the jet water supply passage, and to easily reduce the amount of water flowing into the toilet seat through the rim water spout. As a result, in the process of the water level in the rim water passage decreasing, the strip-shaped water can be effectively prevented from flowing down from the rim water jet port onto the inner surface of the toilet seat, and the deterioration of the appearance in the toilet seat due to the flushing of the toilet can be more effectively prevented.

2. The preferred embodiment of the second invention will be described.

Fig. 11 is a plan view of a toilet bowl 210 of the second embodiment.

The toilet bowl 210 includes a toilet body 212 made of pottery. The toilet body 212 is a wall-mounted toilet that is mounted in a state of being hung on the side wall surface 200 of the toilet.

Fig. 12 is a sectional view taken along line a-a of fig. 11.

The toilet body 212 includes: a toilet seat 214 formed in the front part of the toilet body 212, and a drain passage 216 connected to the bottom of the toilet seat 214. The drain passage portion 216 serves as a passage for the waste discharged from the toilet seat portion 214 to a sewer side water passage (not shown). The drainage passage 216 includes a drainage portion 220 for storing water seal 218 for blocking the flow of air in the water passage direction. A connection pipe 202 is connected to a downstream end of the drain portion 220, and the drain passage portion 216 is connected to a sewer-side water passage via the connection pipe 202.

Fig. 13 is a sectional view taken along line B-B of fig. 12.

As shown in fig. 12 and 13, the toilet seat 214 includes: a basin-shaped receiving face portion 222 for receiving dirt; a recessed portion 224 recessed downward from a lower edge portion of the receiving surface portion 222 and formed at a bottom portion of the toilet seat 214; an edge portion 226 formed at an upper end portion of the toilet seat 214. The receiving surface portion 222 is formed in an elliptical shape having a front-rear dimension larger than a left-right dimension in a plan view. An inlet 216a of the drain passage 216 opens at the bottom surface of the recess 224, and a part of the seal water 218 is stored in the recess 224 as a water pool 228.

As shown in fig. 13, the toilet body 212 includes a water jet unit 230 for jetting flush water. The water jet unit 230 includes: two rim water passages 232L and 232R formed on the outer peripheral side of the rim 226; a shared water passage 234 for supplying flush water to the rim water passages 232L and 232R (see also fig. 12); two edge water spray holes 236L, 236R formed in the edge portion 226. The water jet part 230 has an injection hole 238 formed in the recess 224 of the toilet seat 214, and an injection communication passage 240 for supplying flush water to the injection hole 238. The toilet 210 has one main feature in the rim water passage 232L, which will be described first from the other features of the water ejection portion 230.

The two edge water passages 232L and 232R include a left edge water passage 232L (first edge water passage) on the left side which is one of the left and right sides of the toilet body 212 and a right edge water passage 232R (second edge water passage) on the right side which is the other of the left and right sides of the toilet body 212. As shown in fig. 1, the left edge water passage 232L is disposed on the left side with respect to the left-right center line CL of the toilet body 212. The right edge water passage 232R is disposed on the right side with respect to the left and right center lines CL of the toilet body 212. The left-right center line CL is a straight line that bisects the left-right dimension of the outer surface portion of the toilet body 212 and extends in the front-rear direction.

Returning to fig. 13, the edge water passage 232L and 232R are formed to branch from the downstream end of the shared water passage 234 to the left and right. A branch position 242 at which the edge water passage 232L, 232R branches is disposed rearward of the edge portion 226. As shown in fig. 12, the shared water passage 234 is supplied with flush water from a water supply pipe 204a which is a part of the flush water supply device 204.

The left edge water passage 232L is formed to extend from the start end portion 232a on the side of the branch position 242 to one side in the circumferential direction (clockwise direction in fig. 13). The left edge water passage 232L has an end portion 232b located at the end position in the extending direction and terminating at the end. The details of the left edge water passage 232L are described later.

The right edge water passage 232R is formed to extend from a branch position 242 on the start end side to the other circumferential side (counterclockwise direction in fig. 13). A right edge spout hole 236R is formed at the terminal end portion of the right edge water passage 232R, which is the end position in the extending direction. Hereinafter, the "one circumferential end side" is referred to as a clockwise direction, and the "other circumferential end side" is referred to as a counterclockwise direction.

The two edge spouts 236L and 236R include a left edge spout 236L (first edge spout) on the left side of the toilet body 212 and an edge spout 236R (second edge spout) on the right side of the toilet body 212. As shown in fig. 1, the left edge water jet hole 236L is located on the left side with respect to the left-right center line CL of the toilet main body 212 and is disposed at the rear of the toilet seat 214. The right rim water jet hole 236R is located on the right side with respect to the left-right center line CL of the toilet main body 212 and is disposed at an intermediate position in the front-rear direction of the toilet seat 214.

Returning to fig. 13. The left edge water jet hole 236L is used to jet water from the left edge water passage 232L into the toilet seat 214. The right edge water jet hole 236R is for jetting water from the right edge water channel 232R into the toilet seat 214. The flush water is ejected from the two rim water ejection holes 236L, 236R in the counterclockwise direction along the inner peripheral surface of the rim 226. Thereby, a water flow for flushing the inner surface of the toilet seat 214, particularly the inner surface of the rim portion 226 and the receiving surface portion 222 is formed. The water flow is a spiral flow that is guided in a spiral manner in the counterclockwise direction in the toilet seat 214.

The injection hole 238 is formed on the left and front wall surface of the recess 224 of the toilet seat 214. The flush water is discharged from the discharge hole 238 to the water storage 228 (see fig. 12) in the recess 224 of the toilet seat 214. Specifically, the flush water is discharged counterclockwise along the inner peripheral surface of the recess 224 to the water storage 228 of the recess 224 of the toilet seat 214. Thus, a counterclockwise spiral flow is formed in the concave portion 224 of the toilet seat 214, and the dirt in the concave portion 224 is concentrated to the center of the spiral by the spiral flow. The dirt is pushed into the drain passage portion 216 through the inlet 216a by the flush water flowing into the recess 224 from above the receiving surface portion 222. Thus, a water flow for promoting discharge of the filth is formed in the water storage 228 by the washing water discharged from the injection hole 238.

The injection communication passage 240 communicates the left edge water passage 232L with the injection hole 238. The injection communication path 240 includes a first portion 240A, a second portion 240b, and a third portion 240, which are provided in this order from the left edge water passage 232L to the injection hole 238. The first portion 240a extends downward and radially inward of the toilet seat 214 from a water inlet 240d (described later) that opens on the inner wall surface of the left edge water passage 232L. The second portion 240b extends from the downstream end of the first portion 240a on the outer peripheral side of the toilet seat 214 while curving clockwise and downward. The third portion 240c extends rearward from the downstream end of the second portion 240b toward the injection holes 238.

Fig. 14 is an enlarged view of the left edge water passage 232L in fig. 13.

The left edge water passage 232L is bent in an L shape from the start end 232a to the end 232b and extends. The washing water supplied from the starting end portion 232a to the left edge water passage 232L is guided to the terminal end portion 232b while changing the flow direction by hitting the inner wall surface of the left edge water passage 232L. The left edge water passage 232L is formed to guide the flush water from the start end side to the end side.

The left edge spout hole 236L is formed to branch from a position midway along the path Pa from the start side to the end side of the left edge water passage 232L. The left rim water jet hole 236L is formed to extend from its halfway position to the inner side of the toilet seat 214 in the counterclockwise direction.

A water inlet 240d for introducing flush water into the spray communication passage 240 opens on the terminal side of the left edge water passage 232L through the left edge water jet hole 236L. Specifically, the water inlet 240d is open on the inner bottom surface of the terminal end 232b of the left edge water passage 232L. The water inlet 240d is disposed on the front side of the toilet body 212 through the left edge water jet hole 236L on the left side of the toilet body 212.

The washing water supplied from the start side to the left edge water passage 232L is guided to the left edge water passage 232L, and flows into the water passage portion located on the water introduction port 240d side by the left edge water jetting hole 236L. When the water path portion on the water inlet 240d side is filled with flush water by the left edge water jet hole 236L, a part of the flush water changes its flow direction from the starting end side to the ending end side of the left edge water path 232L and flows into the left edge water jet hole 236L (see the direction Pb). The left edge spout hole 236L is thus formed at a position into which the washing water supplied from the leading end side of the left edge water passage 232L can flow by changing the flow direction.

Fig. 15 is a sectional view taken along line D-D of fig. 14, and fig. 16 is a sectional view taken along line E-E of fig. 14.

As shown in fig. 14 to 16, in the left edge water passage 232L, a throttle 244 is formed between the left edge spout hole 236L and the water inlet 240 d. The position of the throttle portion 244 is indicated by a two-dot chain line in fig. 14.

The throttle portion 244 is formed to throttle the flow of the washing water from the start side to the end side of the left edge water passage 232L. The throttling portion 244 has a wall portion 244a protruding from the inner wall surface of the left edge water passage 232L and a water passage portion 244b through which wash water can pass. The water passage portion 244b is formed as an opening portion surrounded by the wall portion 244a and the inner wall surface of the left edge water passage 232L. The throttle portion 244 is formed such that the space in the left edge water passage 232L becomes narrower and wider from the start end side to the end side. The orifice 244 has a function of reducing the flow rate of flush water flowing from the water path portion 232d located on the leading end side of the orifice 244 of the left edge water path 232L (hereinafter referred to as the leading end side water path portion 232d) to the water path portion 232e located on the trailing end side of the orifice 244 of the left edge water path 232L (hereinafter referred to as the trailing end side water path portion 232 e).

The above operation of the toilet bowl 210 is explained.

As shown in fig. 12 and 13, the shared water passage 234 is supplied with flush water from the water supply pipe 204 a. When the flush water is supplied from the water supply pipe 204a, the flush water is branched from the branch position 242 of the shared water passage 234 and supplied to the rim water passages 232L and 232R (see direction Wp in fig. 13). The washing water flowing through the right edge water passage 232R is ejected from the right edge water ejection hole 236R. A part of the flush water flowing through the left edge water passage 232L is discharged from the left edge water discharge hole 236L, and the remaining flush water is discharged from the discharge hole 238 via the discharge communication passage 240.

Here, a case is considered in which the left edge spout hole 236L is formed in the terminal end portion 232b of the left edge water passage 232L, and the water inlet 240d of the injection communication passage 240 is opened at a midway position of the passage from the starting end side to the terminal end side. In this case, the flush water flowing through the left rim water passage 232L from the start end side is easily guided to the left rim water injection hole 236L of the end portion 232b without changing the flow direction even in the jet communication path 240. This makes it difficult to suck flush water from the left edge water passage 232L through the injection communication passage 240 and to eject high-pressure flush water from the injection hole 238.

(A) On the other hand, according to the toilet bowl 210 of the present embodiment, the flush water flowing into the terminal end portion 232b of the left edge water passage 232L can be easily introduced into the water introduction port 240d located in the vicinity thereof by changing the flow direction thereof only from now on. This makes it easy to suck the washing water from the left edge water passage 232L into the injection communication passage 240, and to discharge the washing water having a high water pressure from the injection hole 238. As a result, the washing water is supplied to the left and right rim water passages 232L, 232R, and is discharged from the plurality of rim water spray holes 236L, 236R, and the washing water is vigorously discharged from the spray holes 238.

(B) In the left edge water passage 232L, a throttle 244 is formed between the left edge water spout hole 236L and the water inlet 240 d. Therefore, a part of the flush water flowing into the water passage portion located on the leading end side of the throttle portion 244 of the left edge water passage 232L flows into the water passage portion located on the trailing end side of the throttle portion 244 of the left edge water passage 232L via the throttle portion 244. This makes it easy to fill the water passage portion located on the leading end side of the throttle portion 244 of the left edge water passage 232L with flush water earlier than the water passage portion located on the trailing end side of the throttle portion 244. This makes it possible to increase the water pressure of the flush water in the water passage portion located on the leading end side of the throttle unit 244 early, and to eject the flush water having a high water pressure from the water passage portion early through the left rim water jet hole 236L. As a result, in the primary flushing operation, the time for ejecting the high-pressure flush water from the left edge water jet hole 236L can be extended, and the toilet flushing capability and the waste discharge capability can be easily improved accordingly.

In the toilet bowl 210 of the present embodiment, since the water passage portion is located on the terminal side of the left edge water passage 232L with respect to the left edge water discharge hole 236L, the timing of discharging the high-pressure flush water from the left edge water discharge hole 236L is delayed. In this case, too, by forming the throttle portion 244 between the left edge water jet hole 236L and the water inlet 240d, there is an advantage that the high-pressure flush water is ejected from the jet hole 238 and the high-pressure flush water is ejected from the left edge water jet hole 236L at an early stage.

In addition, the distribution amount of the washing water distributed from the leading end side of the left edge water passage 232L to the left edge water spray hole 236L and the spray hole 238 can be adjusted by adjusting the size of the water passage portion 244d of the throttle portion 244.

Next, other features of the toilet 210 are explained.

The residual water remaining in the rim water passage 232L, 232R may be streaky water (hereinafter, referred to as streaky water), and may be transferred from the rim water discharge holes 236L, 236R to the inner surface of the toilet seat 214 and flow down. The striped water flows down along the inner surface of the toilet seat with its path irregularly changed, and continues to flow down for a long time, which causes deterioration in appearance. The following describes characteristic points for improving this.

Fig. 17 is a schematic view showing slopes formed on the inner bottom surfaces of the edge water passages 232L and 232R. In this figure, the slope from the high position to the low position is indicated by an arrow. The inner bottom surfaces of the edge water passage paths 232L and 232R are provided with slopes which are inclined downward from the edge water discharge holes 236L and 236R toward the inside.

Specifically, a first slope 250 is provided on the inner bottom surface of the left edge water passage 232L, at which the branching position 242 side, which is the branching point of the edge water passages 232L and 232R, is at the high position and the water inlet 240d of the injection communication passage 240 is at the low position. The first slope 250 is provided in such a manner as to slope downward as going inward from the left edge water jet hole 236L. A second slope 252 is provided on the inner bottom surface of the right edge water passage 232R, the right edge water jet hole 236R being at a high position, and the branch position 242 side of each of the edge water passages 232L, 232R being at a low position. The second slope 252 is provided in such a manner as to slope downward from the right edge water hole 236R to the inner side. A recess 254 is formed at the branching position 242 of each of the edge water passage 232L and 232R so as to be recessed downward.

At least a part of the water inlet 240d of the communication path for spraying 240 is disposed at a position lower than the edge water jetting holes 236L and 236R by the slopes 252 and 254. The water inlet 240 of the present embodiment is disposed entirely at a position lower than the edge watering holes 236L, 236R.

The advantages of the above configuration are explained. When the supply of flush water from the flush water supply device 204 is terminated, the water in the rim water passages 232L and 232R is discharged from the jet communication passage 240 through the water inlet 240d of the left rim water passage 232L, excluding the rim water injection holes 236L and 236R. Here, a situation in which the water level in each of the edge water passage paths 232L and 232R falls to the vicinity of the lower edge of each of the edge water discharge holes 236L and 236R may be considered. In this situation, the residual water remaining on the inner bottom surfaces of the rim water passages 232L and 232R can be discharged from the jet communication passage 240 through the water inlet 240d located at a position lower than the rim water discharge holes 236L and 236R, and the amount of water flowing into the toilet seat 214 through the rim water discharge holes 236L and 236R can be easily reduced. Thus, when the water level in each of the rim water passage 232L, 232R is lowered as in the above-described case, the strip water can be prevented from flowing down from each of the rim water discharge holes 236L, 236R to the inner surface of the toilet seat 214, and the appearance in the toilet seat can be effectively prevented from being deteriorated by the flush toilet.

Here, "residual water" includes a case where flush water for flushing the toilet is left. In addition, the toilet includes residual water formed by makeup water supplied to store the stored water 228 again after the stored water 228 is discharged from the water discharge portion 220 by flushing the toilet.

Further, in the process of lowering the water level in the edge water passage 232L, 232R, the water on the inner bottom surface of the edge water passage 232L, 232R is easily guided by its own weight to the water inlet 240d of the injection communication passage 240 by the first slope 250 and the second slope 252. This makes it possible to discharge the water on the inner bottom surfaces of the rim water passages 232L and 232R through the jet communication passage 240, and the amount of water flowing into the toilet seat 214 through the rim water discharge holes 236L and 236R can be easily reduced. As a result, in the process of the water level in the rim water passage 232L, 232R dropping, the striped water can be effectively prevented from flowing down from the rim water discharge holes 236L, 236R to the inner surface of the toilet seat 214, and the appearance in the toilet seat can be more effectively prevented from being deteriorated by the flush toilet.

Here, as shown in fig. 15, a water passage portion 236d located on the left edge water jet hole 236L side (starting end side) with respect to the orifice 244 is referred to as a starting end side water passage portion 236d, and a water passage portion 236e located on the water introduction port 240d side (terminal end side) with respect to the orifice 244 is referred to as a terminal end side water passage portion 236 e. At this time, the bottom surface 244c of the water passage portion 244b of the throttle portion 244 smoothly connects the inner bottom surface of the leading end side water passage portion 236d and the inner bottom surface of the trailing end side water passage portion 236e to each other along a surface inclined downward from the left edge water jet hole 236L side to the water introduction port 240d side. As shown in fig. 16, the bottom surface 244c is formed at the position where the orifice 244 is formed over the entire width of the left edge water passage 232L in the water passage width direction. Such a throttle portion 244 has a shape capable of guiding the residual water flowing on the inner bottom surface of the left edge water passage 232L in the direction Pc from the left edge water spout hole 236L side to the water inlet 240d side.

This makes it difficult for the residual water to settle, and the residual water easily flows from the left edge spout hole 236L side toward the water inlet 240d side with respect to the throttle portion 244. Thus, even when the throttle portion 244 is formed in the left edge water passage 232L, flush water can be easily discharged from the inside of each of the edge water passages 232L and 232R through the injection communication passage 240. As a result, the strip water can be effectively prevented from flowing down from the edge water jet holes 236L and 236R to the inner surface of the toilet seat 214.

From this viewpoint, the bottom surface 244c of the throttle section 244 may connect the inner bottom surface of the leading end side water passage portion 232d and the inner bottom surface of the trailing end side water passage portion 232e horizontally from the leading end side to the trailing end side, or may connect the trailing end side to be lower than the leading end side. In either case, the left edge water passage 232L has a shape capable of guiding the residual water flowing on the inner bottom surface thereof from the left edge water spout hole 236L side to the water inlet 240d side.

From the viewpoint of exerting such an effect, the bottom surface 244c of the orifice 244 may be formed over a range of a part of the left edge water passage 232L in the water passage width direction at the formation position of the orifice 244.

That is, as described above, the first slope 250 (see fig. 17) that slopes downward as it approaches the water inlet 240d of the spray communication passage 240 is provided on the inner bottom surface of the left edge water passage 232L. Thus, when a water pressure corresponding to the feed water pressure is applied to the flush water in the terminal end side water passage portion 236e of the left edge water passage 232L, the flush water in the terminal end side water passage portion 236e is easily and smoothly guided to the water introduction port 240d along the first slope 250. As a result, the washing water is more easily sucked from the left edge water passage 232L into the injection communication passage 240, and the washing water of high water pressure is more easily ejected from the injection hole 238.

Next, other features of the toilet 210 are explained.

Fig. 18 (a) is a diagram showing the left edge water passage 232L according to the first modification. In this figure, the left edge water passage 232L is shown from the same viewpoint as fig. 15. The throttle portion 244 of this example differs from the example of fig. 15 in that a wall portion 244a is formed between the leading end side water passage portion 232d and the trailing end side water passage portion 232e so as to shut off the flow of fluid through these lower side regions. Note that the toilet bowl 210 also achieves the effects of the above-described operations (a) and (B).

In the case where such a throttling portion 244 is present, the inventors have found through experimental studies that air bubbles are easily ejected from the ejection holes 238. When the bubbles are ejected from the ejection holes 238 in this way, a popping sound of the bubbles occurs, or a sense of incongruity is given to the user in terms of appearance.

The mechanism of this phenomenon is not clear, but the following reason is presumed. As described above, when the washing water W is supplied to the left edge water passage 232L as shown in fig. 18 (b), the leading end side water passage portion 232d is filled with the washing water W first. At this time, the air Ar may remain in the terminal-side water passage portion 232e without being exhausted. In this case, the air Ar is present on the terminal side as viewed from the water passage portion 244b of the throttle portion 244. Thus, when the washing water W is caused to flow into the terminal-side water passage portion 232e through the water passage portion 244b in this state, the washing water W flows into the injection communication passage 240 while the air Ar in the terminal-side water passage portion 232e is entrained. It is inferred that the entrained air is ejected from the ejection hole 238 as bubbles.

In contrast, as shown in fig. 15, the throttle portion 244 of the present embodiment has a wall portion 244a formed between the leading end side water passage portion 232d and the trailing end side water passage portion 232e so as to block the flow of the fluid passing through these upper side regions. As shown in fig. 16, the wall portion 244a is formed over the entire width of the left edge water passage 232L in the water passage width direction at the formation position of the throttle portion 244.

Illustrating the advantages thereof. As shown in fig. 19, a case is considered in which the leading end side water passage portion 232d of the left edge water passage 232L is filled with the washing water W first and the air Ar remains in the trailing end side water passage portion 232 e. In this case, according to the present embodiment, the air Ar is not present on the terminal side and the washing water W is present, as viewed from the water passage portion 244b of the throttle portion 244. Therefore, even if the washing water W is caused to flow into the terminal-side water passage portion 232e through the water passage portion 244b in this state, the air in the terminal-side water passage portion 232e is less likely to be entrained with the washing water W, and the air is less likely to flow into the injection communication passage 240. Therefore, even when the throttle portion 244 is formed in the left edge water passage 232L, bubbles can be prevented from being ejected from the ejection holes 238.

In addition, in the wall 244 forming the throttle 244 as described above, when flush water is supplied into the left edge water passage 232L, the air Ar is not discharged to the outside from the terminal end side water passage portion 232e of the left edge water passage 232L and is likely to remain. Accordingly, when the washing water W passes through the water passage portion 244b of the throttle portion 244, the air Ar acts as resistance, and the washing water flowing into the terminal-side water passage portion 232e is less likely to spread. As a result, the flush water is prevented from diffusing in the terminal-side water passage portion 232e and causing a reduction in water potential, and the flush water is easily vigorously ejected from the ejection holes 238.

As shown in fig. 16, when the water passage height of the left edge water passage 232L is H0 at the formation position of the orifice 244, the wall portion 244a of the orifice 244 is formed so that the height dimension H1 from the inner upper surface of the left edge water passage 232L is equal to or greater than 1/2 of the water passage height H0. The wall portion 244a of the orifice 244 may be formed so that the height H1 from the inner upper surface of the left edge water passage 232L is equal to or greater than 3/4 of the water passage height H0.

The second invention according to the embodiment has been described above, but the embodiment merely shows the principle and application of the second invention. In the embodiment, various modifications and changes in arrangement may be made without departing from the scope of the second invention described in the claims.

The toilet 210 may flush the interior of the toilet seat 214 by a flush method such as a wash-down type or a siphon type. The toilet 210 may be supplied with water by a direct-pressure type of tap water, a gravity-fed type using gravity, or the like. Although the toilet body 212 is described as a wall-mounted toilet, a floor-mounted toilet installed on the floor of a toilet may be used. The toilet body 212 may be made of resin or the like as a material other than ceramics.

The left edge water passage 232L and the right edge water passage 232R are branched from the downstream end of the shared water passage 234, but these may be separately formed.

The example in which the injection hole 238 is formed in the bottom of the toilet seat 214 has been described, but it may be formed in the drain portion 220 of the drain passage portion 216. In this case, the flush water ejected from the ejection hole 238 forms a water flow toward the downstream side of the drain 220 in the seal water 218, thereby promoting the discharge of the filth. That is, the injection hole 238 may be formed at the bottom of the toilet seat 214 or the drain passage 216. In these situations, a flow of water for promoting discharge of contaminants is formed at the water spot 228 or the seal 218.

The example in which the injection communication passage 240 communicates the injection hole 238 with the left edge water passage 232L has been described, but the injection hole 238 may communicate with the right edge water passage 232R. In addition, although the example in which the water inlet 240d of the communication path for injection 240 is open at the terminal end 232b of the left edge water passage 232L has been described, the edge water passage may be open at the terminal end side of the edge spout hole. In addition, an example in which the water inlet 240d of the injection communication passage 240 opens at the inner bottom surface of the left edge water passage 232L is described. The water inlet 240d may be open to the inner wall surface of the rim water passage, or may be open to the inner side surface in addition to the inner bottom surface of the rim water passage.

In the example of fig. 16, the water passage portion 244b of the throttle portion 244 is formed by being surrounded by the inner wall surface of the left edge water passage 232L and the wall portion 244a of the throttle portion 244. Alternatively, as shown in fig. 20, a notch 256 may be formed in the wall portion 244a of the throttle portion 244, and the water passage portion 244b may be formed so as to be surrounded by the notch 256 and the inner wall surface of the left edge water passage 232L. As shown in fig. 20, the water passage portion 244b may be formed in a plurality of places. Alternatively, a through hole may be formed in the wall portion 244a of the throttle portion 244, and the water passage portion 244b may be formed only by the through hole of the wall portion 244 a.

In the example of fig. 11, the first edge water jet hole 36L for jetting the washing water supplied to the left edge water passage 232L is arranged on the left side with respect to the left and right center lines CL, and the second edge water jet hole 236R for jetting the washing water supplied to the right edge water passage 232R is arranged on the right side with respect to the left and right center lines CL. Alternatively, the first edge watering hole 236L may be disposed on the right side with respect to the left-right center line CL, and the second edge watering hole 236R may be disposed on the left side with respect to the left-right center line CL. In short, the position of each edge water hole 236L, 236R is not particularly limited. Further, other edge water jet holes may be formed in the edge portion 226.

In fig. 17, the description has been given of an example of arrangement in which the water introduction port 240d is located at a lower position than the edge water discharge holes 236L and 236R by providing slopes 250 and 252 on the inner bottom surfaces of the edge water passage paths 232L and 232R. Alternatively, the water inlet 240d may be disposed at a position lower than the first edge watering hole 236L by providing a step inclined downward from the first edge watering hole 236L of the first edge watering passage 232L toward the terminal end side.

In addition, the example in which the rim water spray holes 236L, 236R spray flush water to one side in the circumferential direction along the inner circumferential surface of the rim 226 is described. The water jet port formed in the rim 226 may be used to jet flush water into the toilet seat 214, and the jet direction of flush water is not limited to this. For example, the washing water may be sprayed downward.

The example in which the injection hole 238 is formed on the wall surface on the left side and the front side of the recess 224 has been described, but the position thereof is not limited thereto.

When the invention embodied in the above embodiment and modification is generalized, the following technical idea can be derived.

In the toilet bowl according to the second aspect of the present invention according to the first aspect, a throttle portion for throttling a flow of the flush water may be formed in the first edge water passage between the first edge spout hole and the water inlet.

According to this aspect, the water passage portion of the first edge water passage located on the leading end side of the throttle portion can be filled with flush water earlier than the water passage portion located on the trailing end side of the throttle portion. This makes it possible to raise the water pressure of the water passage portion located on the leading end side of the throttle portion earlier than the throttle portion, and to quickly discharge high-pressure flush water from the water passage portion through the first edge water jet holes.

In the toilet bowl according to the third aspect of the second invention, at least a part of the water inlet may be disposed at a position lower than the first edge watering hole in the first or second aspect.

According to this aspect, the remaining water in the first edge water passage can be easily discharged through the water inlet port located at a lower position than the first edge spout hole, and the amount of water flowing into the toilet seat through the first edge spout hole can be easily reduced. This prevents the striped water from flowing down from the first rim water spray hole to the inner surface of the toilet seat.

In the toilet bowl according to the fourth aspect of the present invention according to the second aspect, at least a part of the water inlet may be disposed at a position lower than the first edge spout hole, and the throttle portion may have a shape capable of guiding the residual water flowing on the inner bottom surface of the first edge water passage from the first edge spout hole side to the water inlet.

According to this aspect, the remaining water in the first edge water passage can easily flow from the first edge water spout hole side to the water inlet side without settling in the throttle portion. Therefore, even when the first edge water passage is formed as the throttle portion, the remaining water in the first edge water passage can be easily discharged through the communication passage. Thus, the strip-shaped water can be effectively prevented from flowing down from the first edge water jet hole on the inner surface of the toilet seat.

In the toilet bowl according to the fifth aspect of the present invention according to the third or fourth aspect, a slope that slopes downward from the first edge spout hole toward the inside may be provided on the inner bottom surface of the first edge spout hole.

According to this aspect, the remaining water in the first edge water passage can be easily guided to the water inlet by its own weight, and the amount of water flowing into the toilet seat through the first edge spout hole can be easily reduced. Thus, the strip-shaped water can be effectively prevented from flowing down from the first edge water jet hole on the inner surface of the toilet seat.

A toilet bowl according to a sixth aspect of the second invention may be configured such that, in the second or fourth aspect, the throttle section has a wall portion that blocks the flow of fluid through the upper side regions between a water path portion that is a leading side with respect to the throttle section and a water path portion that is a trailing side with respect to the throttle section.

It is conceivable that the initial-end water passage portion is flushed and filled first and air remains in the upper region of the final-end water passage portion. In this case, according to this aspect, the air is less likely to be present on the terminal side and the flush water is more likely to be present on the water passage portion of the throttle portion. Therefore, even if flush water is caused to flow into the terminal-side water passage portion via the throttle portion in this state, air in the terminal-side water passage portion is less likely to be entrained in the flush water, and air is less likely to flow into the communication passage. Therefore, even when the first edge water passage forms the throttle portion, the air bubbles can be prevented from being discharged from the discharge hole.

In the toilet bowl according to the seventh aspect of the present invention, in any one of the first to sixth aspects, the first edge watering hole may be disposed on one of left and right sides of the toilet bowl body, and the water inlet may be disposed on the front side of the toilet bowl body with respect to the first edge watering hole on the one of left and right sides of the toilet bowl body.

The above embodiments and modifications may include inventions described in the following items.

[ item ]

A toilet bowl, comprising:

a toilet seat having an edge formed at an upper end thereof;

a first edge water passage formed on an outer peripheral side of the edge portion;

a first rim water spray hole for spraying flush water from the first rim water passage into the toilet seat;

a discharge hole formed in a bottom portion of the toilet seat or a drain passage portion connected to the bottom portion; and

a communication passage for communicating the first edge water passage with the discharge hole,

the first edge spout hole is branched from a midway position of a path from a starting end side to a terminal end side of the first edge water passage,

a water inlet of the communication passage is opened at a terminal end side of the first edge water passage with respect to the first edge water hole,

in the first edge water passage, a throttle portion for throttling a flow of the washing water is formed between the first edge water spout hole and the water inlet port.

Description of the reference numerals

10: toilet, 14: toilet seat, 16: inlet, 18: drainage portion, 24: edge portion, 26: water jet section, 28: ejection port (ejection port), 30A: right edge spout (first spout), 30B: left edge spout (second spout), 44: water, 56A: right edge water passage (first water passage), 56B: left edge water passage (second water passage), 58: injection water supply path (water supply path), 64: inlet port, 66: air space, 210: toilet, 214: toilet seat, 216: drainage passage portion, 226: edge portion, 232L: left edge water passage (first edge water passage), 232R: right edge water passage (second edge water passage), 236L: left edge jet (first edge jet), 236L: right edge blowhole (second edge blowhole), 238: ejection hole (ejection hole), 240: injection communication path (communication path), 240 d: water inlet, 244: throttle, 250: ramp, 252: a ramp.

Industrial applicability

The present invention relates to toilets.

Claims (11)

1. A toilet bowl, comprising:

a toilet seat;

a water discharge part connected to the bottom of the toilet seat part for determining a water level of the water stored in the bottom when the water is not flushed; and

a water jet unit having a jet port formed in the bottom portion and a jet water supply path for supplying washing water to the jet port, the water jet unit forming a water flow in the bottom portion by jetting the washing water from the jet port,

the jet port is formed so as to extend vertically over the water level of the stored water during non-flushing, the toilet seat has an edge portion forming an upper end portion of the toilet seat,

the water-jet part comprises: an edge water spout formed at the edge portion; and an edge water passage formed on the inner side of the edge portion and used for supplying washing water to the edge water jet,

the inner bottom surface of the edge water channel is provided with a slope which descends and inclines along with the water from the edge water spray opening to the inner side,

an inlet for introducing the flush water into the jet water supply passage is formed in an inner wall surface of the rim water passage, and at least a part of the inlet is disposed at a position lower than the rim water jet and lower than a highest position of the inner bottom surface having the slope.

2. The water closet of claim 1,

the toilet seat and the water jet unit are configured such that the entire jet opening is submerged by water after the air in the jet water supply passage is discharged from the jet opening and is completed.

3. The water closet of claim 1,

the water spray portion has a rim water jet for spraying washing water into the toilet seat,

the toilet seat and the water jet unit are configured such that after the flush water is jetted from the jet port, the flush water jetted from the rim water jet port splashes on the stored water.

4. The water closet as claimed in any one of claims 1 to 3,

the injection water supply passage is formed such that an air space which is continuous in a non-flushing state exists in a range from an inlet port for introducing flush water to the injection port.

5. A toilet bowl, comprising:

a toilet seat having an edge formed at an upper end thereof;

a first edge water passage formed on an outer peripheral side of the edge portion and located on one of left and right sides of the toilet main body;

a second rim water passage formed on the outer peripheral side of the rim and located on the other of the left and right sides of the toilet main body;

a first rim water spray hole for spraying water from inside the first rim water passage into the toilet seat;

a second rim spout hole for spraying water from within the second rim waterway into the toilet seat;

a discharge hole formed in a bottom portion of the toilet seat or a drain passage portion connected to the bottom portion; and

a communication passage for communicating the first edge water passage with the discharge hole,

the first edge spout hole is branched from a midway position of a path from a starting end side to a terminal end side of the first edge water passage,

the water inlet of the communication passage is open on the terminal side of the first edge water passage with respect to the first edge water hole.

6. The water closet of claim 5,

in the first edge water passage, a throttle portion for throttling a flow of the washing water is formed between the first edge water spout hole and the water inlet.

7. The water closet as claimed in claim 5 or 6,

at least a part of the water inlet is disposed at a position lower than the first edge watering hole.

8. The water closet of claim 6,

at least a part of the water inlet is disposed at a position lower than the first edge watering hole,

the throttle portion is shaped to guide the remaining water flowing on the inner bottom surface of the first edge water passage from the first edge water spouting hole side toward the water inlet port side.

9. The water closet of claim 7,

a slope is provided on an inner bottom surface of the first edge water passage, and the slope is inclined downward from the first edge water spray hole toward the inner side.

10. The water closet according to claim 6 or 8,

the throttle portion has a wall portion that cuts off a flow of fluid passing through an upper region of the water path portion between the water path portion at a starting end side of the throttle portion and the water path portion at a terminating end side of the throttle portion.

11. The water closet as claimed in claim 5 or 6,

the first edge spout hole is disposed on one of the left and right sides of the toilet body,

the water inlet is disposed on one of the left and right sides of the toilet body in front of the toilet body with respect to the first edge spout.

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