Toilet hand washing device and toilet bowl

Abstract

To provide a toilet washhand device capable of achieving improved design and workability.SOLUTION: The toilet washhand device includes a bowl part 20, a water discharge part 30 having a front wall portion 31 and a rear wall portion 32, and having a storage space 39 formed between the front wall portion 31 and the rear wall portion 32, an outflow part 53 provided in the front wall portion 31 and formed with an outflow port 51 for water to flow out therefrom to the bowl part 20, and a water passage part 54 arranged in the storage space 39 and formed with a water passage 56 for water to pass therethrough to the outflow port 51. A portion of the water passage part 54, extending from the front wall portion 31 to the rear wall portion 32, is arranged ranging from the rear side of the front wall portion 31 to the storage space 39.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a hand washing device for a toilet. [Background technology]

[0002] For example, the toilet hand washing device described in Patent Document 1 below comprises a basin and a water discharge device. The water discharge device is attached to the wall on the rear side of the basin. The water discharge device comprises a housing and a cover. A water channel is formed inside the housing. An insertion hole is formed in the wall on the rear side of the basin, allowing the water supply pipe to protrude forward. The housing is connected to the tip of the water supply pipe. The cover is fixed to the housing with fixings such as screws, covers most of the housing, and improves the design. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-119987 Summary of the Invention [Problem to be solved by the invention]

[0004] The installation of the water discharge device in the above-mentioned toilet hand washing device requires time and effort, as it involves connecting the housing to the water supply pipe and fastening the cover. There is a demand for toilet hand washing devices with improved design and ease of installation.

[0005] The present disclosure was completed based on the above circumstances, and aims to provide a hand washing device for a toilet that has good design and ease of installation. [Means for solving the problem]

[0006] The hand washing device for a toilet of the present disclosure comprises a basin portion, a water discharge portion having a front wall portion and a rear wall portion, with a storage space formed between the front wall portion and the rear wall portion, an outflow portion provided in the front wall portion and having an outflow outlet formed therein for discharging water toward the basin portion, and a water passage portion disposed in the storage space and having a water passage formed therein for conducting water to the outflow outlet, and the portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing a toilet hand washing device attached to the top of a toilet flushing tank; [Figure 2] Front view of a toilet hand washing device [Figure 3] Rear view of a toilet hand washing device [Figure 4] Cross-sectional view showing a hand washing device for a toilet [Figure 5] An enlarged cross-sectional view of a portion of a toilet hand washing device showing the vicinity of the outlet [Figure 6] FIG. 10 is a partially enlarged rear view of the toilet hand washing device showing how the water-permeable member is stored through the opening. [Figure 7] 5 is a partially enlarged perspective cross-sectional view of the toilet hand washing device showing the fixing structure of the water-passing member, taken along the line AA in FIG. 4; [Figure 8] A side view showing the water-permeable member [Figure 9] Front view showing the water-permeable member DETAILED DESCRIPTION OF THE INVENTION

[0008] <Embodiment> As shown in Figure 1, the toilet hand washing device 10 is attached as a lid to the top of the toilet flush tank 11. The toilet flush tank 11 is provided at the rear of the toilet 12. The toilet flush tank 11 stores flush water to be supplied into the toilet 12.

[0009] In the following explanation, the upper side when attached to the toilet flushing tank 11 will be referred to as the upper side, the lower side as the lower side, the front side as the front side, the back side as the rear side, and the right side and left side as the right side when viewed from the front side of the toilet hand washing device 10. The positive side of the X axis shown in the drawings is the front side, the negative side of the X axis is the rear side, the positive side of the Y axis is the upper side, the negative side of the Y axis is the lower side, the positive side of the Z axis is the right side, and the negative side of the Z axis is the left side.

[0010] As shown in Figures 1 to 3, the toilet hand washing device 10 comprises a basin portion 20, a water discharge portion 30, and a water-permeable member 50. The water discharge portion 30 discharges a portion of the water supplied from outside the toilet flushing tank 11 via the water-permeable member 50 into the basin portion 20. The water received in the basin portion 20 is discharged from a drain outlet 21 formed in the bottom portion 25 of the basin portion 20, and is stored in the toilet flushing tank 11.

[0011] The bowl portion 20 and the water discharge portion 30 are integrally formed from the same material (synthetic resin, ceramics, etc.). As shown in Figure 4, the bowl portion 20 has a front portion 22, a rear portion 23, left and right side portions 24, a bottom portion 25, and an outer peripheral surface portion 26. The height dimension of the rear portion 23 is greater than the height dimension of the front portion 22. The upper ends of the left and right side portions 24 gradually slope downward from the rear end to the front end. The outer peripheral surface portion 26 surrounds the outer periphery of the bowl portion 20. The outer peripheral surface portion 26 has a front portion 27, a rear portion 28, and left and right outer surface portions 29.

[0012] As shown in Figure 2, the water discharger 30 is provided in the center of the left-right direction of the bowl portion 20. The water discharger 30 is located at the upper end of the rear surface 23 of the bowl portion 20. The water discharger 30 is formed by part of the rear surface 23 of the bowl portion 20 protruding forward.

[0013] 2 and 4, the water discharger 30 has a front wall 31, a rear wall 32, left and right side walls 33, and an upper wall 34. The front wall 31 and the left and right side walls 33 are continuous with the rear surface 23 of the bowl 20. The rear wall 32 is formed by the back surface 28 of the outer peripheral surface 26 of the bowl 20. The upper wall 34 extends forward from the upper end position of the back surface 28.

[0014] As shown in Figure 4, the outer surface 31S of the front wall 31 faces the bowl portion 20. The outer surface 31S of the front wall 31 is a sloped surface that slopes downward toward the rear. The outer surface 31S of the front wall 31 faces the front surface 22 of the bowl portion 20. The front wall 31 and the front surface 22 are approximately parallel. The front wall 31 is formed with a water discharge opening (referred to as a water discharge opening 35) that exposes the outflow port 51 formed in the water-passing member 50. The water discharge portion 30 discharges water downward from the outflow port 51.

[0015] As shown in FIG. 5, the intersection angle between the circumferential surface 36 of the water spouting opening 35 and the outer surface 31S of the front wall portion 31 (referred to as the opening circumferential surface angle 36α) is smaller at the rear side than at the front side. In FIG. 5, the front side is the upper side, and the rear side is the lower side. The circumferential surface 36 of the water spouting opening 35 connects the outer surface 31S of the front wall portion 31 and the inner surface 31U of the front wall portion 31. The opening circumferential surface angle 36α is the angle on a cross section that passes through the center of the water spouting opening 35 and extends in the flow direction of the outflow channel 55 described below. The opening circumferential surface angle 36α is the intersection angle between the tangent to the circumferential surface 36 of the water spouting opening 35 and the tangent to the outer surface 31S at the intersection point between the circumferential surface 36 of the water spouting opening 35 and the outer surface 31S of the front wall portion 31. The opening circumferential surface angle 36α gradually decreases from the front end to the rear end of the water spouting opening 35. The lower end of the circumferential surface 36 of the water discharge opening 35 is approximately horizontal in the XY plane. The upper end of the circumferential surface 36 of the water discharge opening 35 is inclined nearly vertically in the XY plane.

[0016] As shown in Figure 5, the area of ​​the inner surface 31U of the front wall 31 that follows the circumferential surface 36 of the water discharge opening 35 is a recessed portion 37 that is recessed more than other areas. The recessed portion 37 has a sealing surface 38 that comes into close contact with the sealing member 52. As shown in Figure 6, the sealing surface 38 is annular.

[0017] As shown in Figure 4, the interior of the water discharger 30 is the upper part of a storage space 39 that stores a water-permeable member 50. The upper part of the storage space 39 is surrounded by the front wall 31, a cover 45 (described later), an upper wall 34, and left and right side wall parts 33. The lower part of the storage space 39 is formed between the rear surface 23 and rear wall part 32 of the bowl part 20. The storage space 39 extends in the left-right direction between the rear surface 23 and rear wall part 32 of the bowl part 20 and is open downward.

[0018] As shown in Figures 6 and 7, bosses 41 for fixing the water-permeable member 50 are provided in the storage space 39. The bosses 41 protrude rearward from the inner surface 31U of the front wall portion 31 (see Figure 4). A pair of bosses 41 are provided on the left and right. The bosses 41 are formed with holes into which fixing devices 42 such as screws are screwed and fitted.

[0019] As shown in FIG. 6, the inner surface 31U of the front wall portion 31 is provided with ribs 43 that protrude rearward. A pair of ribs 43 is provided on the left and right. Each rib 43 is plate-shaped. The plate surfaces of each rib 43 are parallel to the front-rear direction. Each rib 43 is connected to the lower end of a boss 41 and supports the boss 41.

[0020] As shown in FIG. 6, an opening 44 is formed in the rear wall 32. The opening 44 opens the storage space 39 to the rear of the rear wall 32. The entire periphery of the opening 44 is closed. The opening 44 is rectangular. The left-right dimension of the opening 44 is greater than the up-down dimension of the opening 44. The opening 44 is closed by a cover 45 (see FIG. 4). When attached to the opening 44, the cover 45 forms part of the rear wall 32.

[0021] As shown in Figure 4, a water-permeable member 50 is stored in the storage space 39. The water-permeable member 50 is made of a hard material such as synthetic resin. The water-permeable member 50 is fixed to a boss 41 in the storage space 39 with a fastener 42. The lower end of the water-permeable member 50 is connected to a water supply pipe (not shown) in the toilet flushing tank 11.

[0022] As shown in Figure 4, the water-passing member 50 has an outflow section 53 and a water-passing section 54. An outflow port 51 and an outflow path 55 are formed in the outflow section 53. The outflow port 51 opens to a tip surface 53F of the outflow section 53. The outflow port 51 flows water out toward the basin section 20. The outflow path 55 slopes downward toward the outflow port 51.

[0023] As shown in FIG. 5, the outflow portion 53 has a tip portion 53A and a rear portion 53B that continues to the rear side of the tip portion 53A. The tip portion 53A protrudes outward from the front wall portion 31. A tip surface 53F of the tip portion 53A is located outward from the outer surface 31S of the front wall portion 31. The rear portion 53B is located in the storage space 39. A seal surface 59 that comes into close contact with the seal member 52 is formed on the front surface of the rear portion 53B. The seal surface 59 has an annular shape that surrounds the outer peripheral surface of the tip portion 53A (see FIG. 9). The seal surface 59 forms a peripheral portion that surrounds the outflow port 51.

[0024] As shown in Figure 8, the sealing member 52 is provided at the front end of the water-passing member 50. The sealing member 52 has an annular shape that surrounds the tip end 53A of the outflow portion 53 (see Figure 9). The sealing member 52 is interposed between the sealing surface 59 of the rear portion 53B and the sealing surface 38 on the periphery of the water discharge opening 35.

[0025] As shown in FIG. 4 , the water passage section 54 is formed with a water passage 56 that is connected to the upstream end of the outlet passage 55 and that conducts water to the outlet port 51. The water passage 56 has a first water passage 57 and a second water passage 58. The first water passage 57 extends substantially horizontally from the upstream end of the outlet passage 55 toward the rear, while the second water passage 58 extends substantially vertically downward from the upstream end of the first water passage 57. The flow path area of ​​the first water passage 57 narrows midway from the upstream side to the downstream side. The downstream portion of the first water passage 57 is referred to as a front water passage 57F, and the upstream portion of the first water passage 57 is referred to as a rear water passage 57R. The flow path area of ​​the front water passage 57F is smaller than the flow path area of ​​the rear water passage 57R. The flow path area of ​​the second water passage 58 is smaller downstream than upstream.

[0026] The water-passing member 50 is formed by joining two members separated in the flow path direction. The two members are a first member 61 including an outflow section 53, and a second member 62 connected to the rear side of the first member 61. An outflow path 55 and a front water passage 57F are formed inside the first member 61. A rear water passage 57R and a second water passage 58 are formed inside the second member 62.

[0027] The first member 61 and the second member 62 are connected to each other and fixed with an adhesive. When the first member 61 and the second member 62 are connected, the front end of the second member 62 is inserted inside the rear end of the first member 61. The rear end of the first member 61 has a groove 63, and the front end of the second member 62 has a protrusion 64 (see FIG. 7). When the first member 61 and the second member 62 are connected, the protrusion 64 fits into the groove 63. The groove 63 is provided in the center in the left-right direction of the upper surface of the first member 61. The protrusion 64 is provided in the center in the left-right direction of the upper surface of the second member 62. The protrusion 64 extends long in the front-rear direction. The front end of the protrusion 64 fits into the groove 63, and the portion rearward of that extends rearward from the groove 63.

[0028] As shown in Figure 8, the water-passing member 50 has a bent portion 65 between the downstream end 50U and the upstream end 50S. The portion of the water-passing member 50 from the downstream end 50U to the bent portion 65 is referred to as the downstream portion 66, and the portion from the upstream end 50S to the bent portion 65 is referred to as the upstream portion 67. The downstream portion 66 and the upstream portion 67 are generally perpendicular to each other. The bent portion 65 includes the rear end of the downstream portion 66 and the upper end of the upstream portion 67.

[0029] The length dimension L1 of the downstream portion 66 is smaller than the maximum dimension L2 of the opening width of the opening 44. The length dimension L1 of the downstream portion 66 is the dimension from the front end of the outflow portion 53 to the rear end of the downstream portion 66. The front end of the outflow portion 53 is the upper end of the tip surface 53F of the tip portion 53A. The maximum dimension L2 of the opening width of the opening 44 is the length dimension of the diagonal of the opening 44, as shown in Figure 3. The length dimension L3 of the upstream portion 67 is larger than the maximum dimension L2 of the opening width of the opening 44 (see Figure 6). The length dimension L3 of the upstream portion 67 is the length dimension from the upper end of the upstream portion 67 to the lower end of the upstream portion 67.

[0030] 6, the water-permeable member 50 is placed in the storage space 39 through the opening 44. Specifically, the water-permeable member 50 is inserted into the storage space 39 with the bottom end first, in an inclined position along the diagonal line of the opening 44.

[0031] As shown in Fig. 7, the water-passing member 50 has a fixing portion 68 that is fixed to the boss 41 of the front wall portion 31 by a fixing device 42. As shown in Fig. 9, the fixing portion 68 is provided on the second member 62. A pair of fixing portions 68 are provided on the left and right. The fixing portion 68 is tubular and accommodates the fixing device 42 inside.

[0032] The water-permeable member 50 has recesses 69 that fit into the ribs 43. The recesses 69 are provided in both the left and right fixing portions 68. The recesses 69 are recessed from the front ends of the fixing portions 68 toward the rear. The recesses 69 penetrate the fixing portions 68 in the up-down direction.

[0033] The embodiment configured as described above provides the following advantages. The toilet hand washing device 10 includes a basin portion 20, a water discharge portion 30, an outflow portion 53, and a water passage portion 54. The water discharge portion 30 has a front wall portion 31 and a rear wall portion 32. A storage space 39 is formed between the front wall portion 31 and the rear wall portion 32. The outflow portion 53 is provided in the front wall portion 31. An outflow port 51 is formed in the outflow portion 53, through which water flows toward the basin portion 20. The water passage portion 54 is disposed in the storage space 39. A water passage channel 56 is formed in the water passage portion 54, through which water flows to the outflow port 51. The portion of the water passage portion 54 that extends from the front wall portion 31 toward the rear wall portion 32 is disposed in the storage space 39 from the rear side of the front wall portion 31.

[0034] According to this configuration, the portion of the water passage portion 54 extending from the front wall portion 31 toward the rear wall portion 32 is covered by the front wall portion 31, so the design can be improved without attaching a cover to the front side of the water passage portion, and since attaching a cover is not necessary, workability can be improved. Therefore, the design and workability can be improved.

[0035] Water passage section 54 has a first member 61 and a second member 62 that are divided in the flow path direction. Of first member 61 and second member 62, first member 61, which includes outflow section 53, is arranged in storage space 39 from the rear side of front wall section 31. According to this configuration, most of water passage section 54 is arranged in storage space 39 from the rear side of front wall section 31.

[0036] The portion of water passage section 54 that is forward of the center in the front-to-rear direction is disposed from the rear side of front wall section 31 into storage space 39. According to this configuration, most of water passage section 54 is disposed from the rear side of front wall section 31 into storage space 39.

[0037] An opening 44 is formed in the rear wall portion 32. The water-permeable member 50 is placed in the storage space 39 through the opening 44. With this configuration, the water-permeable member 50 can be easily placed in the storage space 39. Therefore, workability can be improved.

[0038] Water-passing member 50 has a bent portion 65 between downstream end 50U and upstream end 50S. Maximum dimension L2 of the opening width of opening 44 is greater than length dimension L1 from downstream end 50U to bent portion 65 and is smaller than length dimension L3 from upstream end 50S to bent portion 65. With this configuration, water-passing member 50 can be disposed in storage space 39 through opening 44 while minimizing the size of opening 44.

[0039] The outflow portion 53 and the water passage portion 54 are integrally formed. With this configuration, the outflow portion 53 can be attached together with the water passage portion 54. This improves workability.

[0040] The front wall 31 is formed with a water discharge opening 35 that exposes the outlet 51. The toilet hand washing device 10 is provided with a seal member 52 that is interposed between the peripheral edge of the outlet 51 in the outflow section 53 and the peripheral edge of the water discharge opening 35 in the front wall 31. This configuration prevents water flowing out from the outlet 51 from leaking inside the front wall 31.

[0041] The area of ​​the inner surface 31U of the front wall 31 along the periphery of the water discharge opening 35 is a recessed portion 37 that is recessed more than other areas. According to this configuration, by fitting the sealing member 52 into the recessed portion 37, the outflow portion 53 can be easily positioned.

[0042] The outer surface 31S of the front wall 31 is an inclined surface that slopes downward toward the rear. The opening peripheral surface angle 36α is smaller at the rear side than at the front side. With this configuration, the opening width of the water discharge opening 35 is larger at the inner surface 31U side of the front wall 31 than at the outer surface 31S side. This improves the appearance of the toilet hand washing device 10 from the front.

[0043] The opening peripheral angle 36α gradually decreases from the front end to the rear end of the water discharge opening 35. This configuration improves the design of the toilet hand washing device 10 when viewed from the front.

[0044] A rib 43 that protrudes rearward is provided on the rear surface of the front wall portion 31. The water passage portion 54 has a recess 69 that fits into the rib 43. With this configuration, by fitting the recess 69 into the rib 43, the water passage portion 54 can be prevented from rotating.

[0045] A boss 41 for fixing the water passage portion 54 is provided on the rear surface of the front wall portion 31. The rib 43 supports the boss 41. With this configuration, the strength of the boss 41 can be increased by the rib 43, thereby improving durability.

[0046] The first member 61 and the second member 62 are connected in the flow path direction. The first member 61 has a groove 63, and the second member 62 has a protrusion 64 that fits into the groove 63. With this configuration, the first member 61 and the second member 62 can be easily connected by fitting the groove 63 into the protrusion 64.

[0047] The bowl portion 20 and the water discharge portion 30 are formed as a single unit. With this configuration, no groove-like seam is formed at the boundary between the bowl portion 20 and the water discharge portion 30, which improves cleaning ease and design.

[0048] <Other embodiments> The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure. (1) In the above embodiment, the outflow portion 53 and the water passage portion 54 are integrally formed. However, this is not limiting, and the outflow portion and the water passage portion may be formed separately. In this case, the outflow portion may be attached to the water discharge opening from the front of the front wall portion. (2) In the above embodiment, the entire water passage portion 54 is attached from the rear side of the front wall portion 31. However, this is not limiting, and the front end portion of the water passage portion may be attached from the front side of the front wall portion. (3) In the above embodiment, the water-permeable member 50 is stored in the storage space 39 through the opening 44 in the rear wall 32. However, the water-permeable member may be stored in the storage space from any direction behind the front wall. For example, the water-permeable member may be stored in the storage space from the opening below, or from either the left or right side. (4) In the above embodiment, the water passage portion 54 has two members divided in the flow path direction. However, the water passage portion is not limited to this, and may not be divided in the flow path direction, or may have three or more members divided in the flow path direction. (5) In the above embodiment, the water-permeable member 50 has a bent portion 65. However, the water-permeable member does not have to have a bent portion. For example, the water-permeable member may have a curved shape that follows the front wall of the water discharger and the rear surface of the bowl. (6) In the above embodiment, the opening peripheral surface angle 36α is smaller on the rear side than on the front side. However, the opening peripheral surface angle is not limited to this, and may be changed as appropriate by changing the inclination angle of the outer surface of the front wall portion, etc. (7) In the above embodiment, the tip surface 53F of the outflow portion 53 is located outside the outer surface 31S of the front wall portion 31. However, the tip surface of the outflow portion may be flush with the outer surface of the front wall portion, or may be located inside the outer surface of the front wall portion. (8) In the above embodiment, the outer surface 31S of the front wall portion 31 is inclined downward toward the rear. However, the outer surface of the front wall portion may be substantially horizontal or substantially vertical. (9) In the above embodiment, the outflow channel 55 extends obliquely upward from the outflow port 51. However, the outflow channel is not limited to this and may extend, for example, vertically or horizontally. [Explanation of symbols]

[0049] L1...length dimension from downstream end to bent portion, L2...maximum opening width of opening, L3...length dimension from upstream end to bent portion, 10...toilet hand washing device, 20...basin portion, 30...spout portion, 31...front wall portion, 31S...outer surface of front wall portion, 31U...inner surface of front wall portion, 32...rear wall portion, 35...spout opening, 36...circumferential surface of spout opening, 36α...intersection angle, 37...recess portion, 39...storage space, 41...boss, 43...rib, 44...opening, 51...outlet, 52...sealing member, 53...outflow portion, 54...water passage portion, 56...water passage channel, 61...first member (plurality of members), 62...second member (plurality of members), 63...groove portion, 64...projection portion, 65...bend portion, 69...recess

Claims

1. The bowl and a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl; an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion; a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet; Equipped with a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion; an opening formed in the rear wall; A hand washing device for a toilet, wherein a portion of the water passage portion extending from the front wall portion toward the rear wall portion is placed in the storage space through the opening.

2. The water flow section has a plurality of members divided in the flow path direction, The hand washing device for a toilet according to claim 1, wherein the member among the plurality of members that is connected immediately upstream of the outflow portion is arranged in the storage space from the rear side of the front wall portion.

3. The hand washing device for a toilet according to any one of claims 1 to 2, wherein a portion of the water passage portion forward of the center in the front-to-rear direction is arranged in the storage space from the rear side of the front wall portion.

4. a portion of the water passage that passes through the opening and is disposed in the storage space has a bent portion between a downstream end and an upstream end, A toilet hand washing device as described in any one of claims 1 to 3, wherein the maximum dimension of the opening width of the opening is greater than the length dimension from the downstream end to the bent portion and smaller than the length dimension from the upstream end to the bent portion.

5. The hand washing device for a toilet according to any one of claims 1 to 4, wherein the outflow portion and the water passage portion are integrally formed.

6. A bowl portion, a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl; an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion; a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet; Equipped with a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion; The front wall portion is formed with a water discharge opening that exposes the outlet, a seal member interposed between a peripheral edge of the outlet port of the outflow portion and a peripheral edge of the water discharge opening of the front wall portion, A hand washing device for a toilet, wherein an area of ​​the inner surface of the front wall portion along the periphery of the water discharge opening is a recessed portion that is recessed more than other areas.

7. The front wall portion is formed with a water discharge opening that exposes the outlet, The outer surface of the front wall portion is an inclined surface that slopes downward toward the rear, The hand washing device for a toilet according to any one of claims 1 to 6, wherein an angle of intersection between the peripheral surface of the water discharge opening and the outer surface of the front wall portion is smaller on the rear side than on the front side.

8. The intersection angle gradually decreases from the front end to the rear end of the water discharge opening. A hand washing device for a toilet according to claim 7.

9. A bowl portion, a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl; an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion; a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet; Equipped with a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion; A rib protruding rearward is provided on the rear surface of the front wall portion, The water passage portion has a recess that fits into the rib, and the hand washing device for a toilet.

10. A boss for fixing the water passage portion is provided on the rear surface of the front wall portion, The toilet hand washing device of claim 9, wherein the rib supports the boss.

11. The water flow section has a plurality of members divided in the flow path direction, The plurality of members are connected in the flow path direction, The hand washing device for a toilet according to any one of claims 1 to 10, wherein one of the members to be connected to each other has a groove portion, and the other has a protrusion that fits into the groove portion.

12. A toilet equipped with a toilet flushing tank equipped with a toilet hand washing device described in any one of claims 1 to 11.

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