Hand washing device

Abstract

To provide a washhand device capable of improving cleaning performance.SOLUTION: A washhand device 10 comprises: a bowl part 20; and a water discharge part 40 that is integrally formed with the bowl part 20 and protrudes from the bowl part 20. Cleaning performance can be improved since such a configuration does not form a groove-like seam at a boundary between the bowl part 20 and the water discharge part 40.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a hand washing apparatus. [Background technology]

[0002] Conventionally, hand washing devices with a water discharge unit provided above a basin are known. For example, the hand washing device described in Patent Document 1 below has a water discharge unit on the rear surface of the basin. [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] Dirt tends to accumulate in the joints of the hand washing device, and the grooved joints are difficult to wipe clean.

[0005] The present disclosure was completed in light of the above circumstances, and aims to provide a hand washing device that can be easily cleaned. [Means for solving the problem]

[0006] The hand washing device of the present disclosure comprises a basin portion and a water discharge portion formed integrally with the basin portion and protruding from the basin portion. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing a hand washing device according to a first embodiment, which is disposed above a toilet flushing tank; [Figure 2] Front view of hand washing device [Figure 3] Plan view showing the hand washing device [Figure 4]FIG. 3 is a cross-sectional view showing the hand washing device, which corresponds to the cross section taken along the line AA in FIG. 2; [Figure 5] FIG. 4 is a cross-sectional view showing the hand washing device, which corresponds to the cross section at position BB in FIG. [Figure 6] Rear view showing hand washing device [Figure 7] Enlarged cross-sectional view of a portion of the hand washing device showing the area around the drain [Figure 8] FIG. 10 is a partially enlarged plan view showing a mesh portion of a drain outlet of a hand washing device according to a second embodiment; [Figure 9] Enlarged cross-sectional view of a portion of the hand washing device showing the mesh portion of the drain outlet [Figure 10] FIG. 10 is a partially enlarged plan view showing a mesh portion of a drain outlet in a hand washing device according to another embodiment (1); [Figure 11] Enlarged cross-sectional view of a portion of the hand washing device showing the mesh portion of the drain outlet [Figure 12] FIG. 10 is a partially enlarged plan view showing a mesh portion of a drain outlet in a hand washing device according to another embodiment (2); [Figure 13] Enlarged cross-sectional view of a portion of the hand washing device showing the mesh portion of the drain outlet [Figure 14] FIG. 10 is a partially enlarged plan view showing the mesh portion of the drain outlet of the hand washing device according to another embodiment (3). [Figure 15] Enlarged cross-sectional view of a portion of the hand washing device showing the mesh portion of the drain outlet DETAILED DESCRIPTION OF THE INVENTION

[0008] <Embodiment 1> A hand washing device 10 according to a first embodiment will be described with reference to Figures 1 to 7. As shown in Figure 1, the hand washing device 10 is attached as a lid to the top of a toilet flushing tank 11. The toilet flushing tank 11 is provided at the rear of a toilet 12. The toilet flushing tank 11 stores flush water to be supplied into the toilet 12.

[0009] For convenience in the following explanation, the side of the toilet 12 where the toilet flushing tank 11 is installed (the negative side of the X axis) will be referred to as the rear side, and the opposite side (the positive side of the X axis) will be referred to as the front side. The side of the toilet flushing tank 11 where the hand washing device 10 is attached (the positive side of the Y axis) will be referred to as the upper side, and the opposite side (the negative side of the Y axis) will be referred to as the lower side. When viewing the hand washing device 10 from the front of the toilet 12, the right side (the positive side of the Z axis) will be referred to as the right side, and the left side (the negative side of the Z axis) will be referred to as the left side. The X axis, Y axis, and Z axis are perpendicular to each other.

[0010] As shown in Figures 2 and 3, the hand washing device 10 comprises a basin portion 20, a water discharge portion 40, and a drain pipe portion 50. The basin portion 20, the water discharge portion 40, and the drain pipe portion 50 are integrally formed from the same material (synthetic resin, ceramics, etc.). The water discharge portion 40 discharges a portion of the water supplied from outside the toilet flushing tank 11 into the basin portion 20. The water received in the basin portion 20 is drained through the drain pipe portion 50 into a drain pipe (not shown) of the toilet flushing tank 11.

[0011] The bowl portion 20 includes an inner peripheral wall portion 21, an outer peripheral wall portion 22, and a bottom wall portion 23K. The outer peripheral wall portion 22 surrounds the outer peripheral side of the inner peripheral wall portion 21. The inner peripheral wall portion 21 and the outer peripheral wall portion 22 are continuous at their upper ends. The bottom wall portion 23K is continuous with the lower end of the inner peripheral wall portion 21.

[0012] The inner peripheral wall 21 has a front wall 24K, a rear wall 25K, and left and right inner wall portions 26K. As shown in FIG. 4, the height of the rear wall 25K is greater than the height of the front wall 24K. The upper ends of the left and right inner wall portions 26K gradually decrease from the rear end to the front end. The height position of the upper end of the front wall 24K is such that the difference in height between the front wall 24K and the bottom wall 23K is minimized.

[0013] 4 and 5, the outer peripheral wall 22 has a front wall 27, a rear wall 28, and left and right outer wall portions 29. The front wall 27 stands in front of the front wall 24K. The rear wall 28 stands behind the rear wall 25K. The left and right outer wall portions 29 stand on both the left and right outer sides of the inner wall 26K.

[0014] A space 31 is provided between the inner peripheral wall 21 and the outer peripheral wall 22. The space 31 is open downward. The space 31 has a front space 32, a rear space 33, and left and right spaces 34. The front space 32 is formed between the front wall 24K and the front wall 27. The distance between the front wall 24K and the front wall 27 in the front-to-rear direction increases from top to bottom. The rear space 33 is formed between the rear wall 25K and the rear wall 28. The distance between the rear wall 25K and the rear wall 28 in the front-to-rear direction increases slightly from top to bottom. The left and right spaces 34 are formed between the inner wall 26K and the outer wall 29. The distance between the inner wall 26K and the outer wall 29 in the left-to-right direction increases from top to bottom.

[0015] The front wall portion 24K forms the front surface 24. As shown in FIG. 4, the front surface 24 intersects with an imaginary vertical plane S at an angle α1. The imaginary vertical plane S is a YZ plane. The inclination angle α1 of the front surface 24 is determined by the height position of the upper end of the front surface 24 and the height position of the drain outlet 51. By increasing the inclination angle α1 of the front surface 24, it becomes easier for the user to insert their hands below the water outlet 40 when washing their hands with the hand washing device 10. The lower end of the front surface 24 is continuous with the bottom surface 23 by a curved surface. The portion of the front surface 24 above the curved surface at the lower end is formed in an approximately flat shape.

[0016] The rear wall portion 25K forms the rear surface 25. The rear surface 25 stands at an angle close to parallel to an imaginary vertical plane S. "Parallel" includes a state of being roughly parallel as well as a state of being strictly parallel. The lower end of the rear surface 25 is connected to the bottom surface 23 by a curved surface. By increasing the radius of curvature of the curved surfaces of the lower end of the rear surface 25 and the lower end of the front surface 24 (the radius of curvature when approximated to an arc on the XY plane), it becomes easier to wipe and clean the back side of the bowl portion 20.

[0017] As shown in Figure 2, the water discharger 40 is provided in the center of the basin 20 in the left-right direction. The water discharger 40 is located at the upper end of the basin 20. The water discharger 40 does not protrude above the upper end of the basin 20. The water discharger 40 has an upper surface 41, a lower surface 42, and left and right side surfaces 43.

[0018] As shown in Figure 4, the water spouting section 40 protrudes forward from the rear surface 25 of the bowl portion 20. The underside 42 of the water spouting section 40 faces the bottom surface 23. The underside 42 of the water spouting section 40 has a water spouting opening 44. The water spouting section 40 spouts water downward from a water spouting component 45 fitted into the water spouting opening 44. The underside 42 of the water spouting section 40 is inclined upward at the front. The underside 42 of the water spouting section 40 intersects with an imaginary vertical plane S at an angle α2. The underside 42 of the water spouting section 40 is the opposing surface that faces the front surface 24 of the bowl portion 20. The underside 42 of the water spouting section 40 and the front surface 24 of the bowl portion 20 are approximately parallel. The distance W between the underside 42 of the water spouting section 40 and the front surface 24 of the bowl portion 20 in the opposing direction is constant from the back side to the front side of the bowl portion 20. The direction from the back to the front of the bowl portion 20 is parallel to the mold-removal direction D1 of the first mold, which will be described later. The term "equal" includes not only a strictly equal state, but also a state in which the bowl portion 20 slightly widens from the back to the front. The slightly widened shape is not necessary in order to remove the first mold.

[0019] 4, the upper surface 41 of the water discharger 40 is inclined slightly downward toward the front. The rear end of the upper surface 41 of the water discharger 40 is connected to the upper end of the rear wall portion 28.

[0020] The interior of water discharger 40 is storage section 40S that stores water discharger component 45. Storage section 40S is surrounded by top surface 41, left and right side surfaces 43, and bottom surface 42 of water discharger 40. Storage section 40S is provided with fixing section 45F that fixes water discharger component 45 (see FIG. 6).

[0021] The water discharge component 45 is made of a hard material such as synthetic resin. The water discharge component 45 is fixed to a fixing portion 45F of the storage section 40S with a fixing device such as a screw. A water supply passage is formed inside the water discharge component 45. The lower end of the water discharge component 45 is connected to a water supply pipe (not shown) inside the toilet flushing tank 11.

[0022] As shown in FIG. 2, the boundary between the water spouting portion 40 and the bowl portion 20 is continuous by a curved surface 46. The curved surface 46 continues from the rear end (base portion) of the water spouting portion 40 to the rear surface 25 of the bowl portion 20. The curved surface 46 is formed around the rear end of the water spouting portion 40. The curved surface 46 has left and right curved portions 47 formed on both the left and right sides of the water spouting portion 40, and a lower curved portion 48 formed on the underside of the water spouting portion 40. When viewed from the front, the curved surface 46 is U-shaped. The lower ends of the left and right curved portions 47 and the left and right ends of the lower curved portion 48 are gently connected in an arc-like shape. When viewed from the front, the width dimension B1 of the curved surface 46 is approximately constant along the U-shape. The width dimension B1 of the curved surface 46 is larger than the diameter dimension of the water spouting opening 44. The curvature of curved surface 46 is smaller than the curvature of the curved surface connecting inner peripheral wall portion 21 and outer peripheral wall portion 22. The curvature of curved surface 46 is smaller than the curvature of the curved surface connecting upper surface 41 and lower surface 42 of water discharge portion 40. Curved surface 46 is symmetrical with respect to the center of hand washing device 10 in the left-right direction.

[0023] 3, the left and right curved portions 47 are continuous at the boundaries between the left and right side surfaces 43 of the water discharger 40 and the rear surface 25 of the bowl portion 20. When the left and right curved portions 47 are approximated as arcs on the XZ plane, their center points are located on the left and right sides of the water discharger 40, respectively, and further forward than the rear surface 25 on the same XZ plane.

[0024] As shown in Figure 4, lower curved portion 48 is continuous at the boundary between underside 42 of water discharger 40 and rear surface 25 of bowl portion 20. When lower curved portion 48 is approximated as an arc on the XY plane, its center point is located below underside 42 of water discharger 40 and in front of rear surface 25.

[0025] As shown in Figure 6, an opening 49 is formed in the rear wall 28. The entire periphery of the opening 49 is closed. The opening 49 is formed at the upper end of the rear wall 28. The opening 49 is open on the side opposite to the protruding direction of the water discharger 40. The opening 49 opens the water discharger 40 to the rear of the rear wall 28. The opening 49 is rectangular in shape and is longer in the left-right direction than in the up-down direction.

[0026] The curved surface 46 is formed at a position overlapping with the opening 49 in the front-to-rear direction. In other words, most of the curved surface 46 and the opening 49 overlap when projected onto the YZ plane. Most of the curved surface 46 is located between the upper edge and the lower edge of the opening 49 in the up-down direction (Y-axis direction). Most of the curved surface 46 is located between the left and right edges of the opening 49 in the left-right direction (Z-axis direction). Almost the entire rear side of the curved surface 46 can be seen from behind through the opening 49. The entire rear side of the lower curved portion 48 of the curved surface 46 is exposed rearward through the opening 49. The lower end of the lower curved portion 48 is located slightly above the lower edge of the opening 49. The fixing portion 45F of the water discharger 45 is exposed rearward from the opening 49. The water discharger 45 is placed in the storage section 40S through the opening 49. By increasing the radius of curvature of lower curved portion 48 when it is approximated as an arc on the XY plane, water discharger component 45 can be easily assembled into storage section 40S (see FIG. 4). A cover member (not shown) is attached to opening 49. The cover member covers the rear side of water discharger component 45.

[0027] As shown in FIG. 5, the drain pipe 50 hangs down from the bottom wall 23K. The drain pipe 50 is provided at the lowest point (lowest end position) of the bottom wall 23K. The opening at the upper end of the drain pipe 50 is a drain outlet 51. The height position of the drain outlet 51 is determined by the height position of a drain pipe (not shown) inside the toilet flushing tank 11. The inner diameter dimension of the drain pipe 50 increases slightly from top to bottom.

[0028] As shown in FIG. 7, the peripheral edge of the drain outlet 51 is formed by a drain outlet curved surface 52. The drain outlet curved surface 52 continues from the bottom surface 23 to the drain pipe portion 50. The drain outlet curved surface 52 curves from the outside to the inside in the radial direction of the drain outlet 51. The drain outlet curved surface 52 is formed around the entire circumference of the drain outlet 51. When the drain outlet curved surface 52 is approximated to an arc on a cross section cut in the radial direction of the drain outlet 51, the curvature is smaller at the front side of the drain outlet 51. The width dimension B2 (the radial dimension of the drain outlet 51) of the front portion of the drain outlet curved surface 52 is smaller than the width dimension B3 of the rear portion. The width dimensions B2 and B3 are dimensions on the XY plane parallel to the XZ plane.

[0029] The front side of the hand washing device 10 (the inner side of the basin portion 20) is formed by removing a first mold (not shown) in the direction of arrow D1, as shown in FIG. 4. Arrow D1 is perpendicular to the direction in which the front surface 24 of the basin portion 20 and the underside 42 of the spout portion 40 face each other. "Perpendicular" includes not only a strictly perpendicular state but also a roughly perpendicular state. As long as the first mold can be removed, "perpendicular" does not have to be the case. Arrow D1 is parallel to the inclination angles α1 and α2 of the front surface 24 of the basin portion 20 and the underside 42 of the spout portion 40. The first mold forms the bottom surface 23, front surface 24, rear surface 25, left and right inner surfaces 26, the underside 42 of the spout portion 40, left and right side surfaces 43, curved surface 46, and the curved drain surface 52 of the drain outlet 51 of the basin portion 20.

[0030] The rear side of the hand washing device 10 (the back side of the basin 20) is formed by removing a second mold (not shown) in the direction of arrow D2. Arrow D2 is parallel to the X-axis direction. The second mold forms the storage section 40S of the water discharger 40, the rear side of the curved surface 46, and the rear wall 28.

[0031] The underside of the hand washing device 10 is formed by removing a third mold (not shown) in the direction of arrow D3. Arrow D3 is parallel to the Y-axis direction. The third mold forms the space 31 between the inner circumferential wall 21 and the outer circumferential wall 22 and the drain pipe 50.

[0032] The embodiment configured as described above provides the following advantages. The hand washing device 10 has a basin portion 20 and a water discharge portion 40 formed integrally with the basin portion 20. The water discharge portion 40 protrudes from the basin portion 20. With this configuration, no groove-like seam is formed at the boundary between the basin portion 20 and the water discharge portion 40, improving cleanability and appearance.

[0033] The boundary between water discharger 40 and basin 20 is continuous by curved surface 46. With this configuration, dirt is less likely to accumulate at the boundary between water discharger 40 and basin 20, making it easier to clean.

[0034] Bowl portion 20 has a bottom surface 23, a front surface 24, a rear surface 25, and left and right side surfaces 43. Water discharge portion 40 protrudes forward from rear surface 25. With this configuration, splashes are less likely to fly around.

[0035] In the hand washing device 10, the distance W between the front surface 24 of the basin portion 20 and the underside 42 of the water discharger portion 40 that faces the front surface 24 of the basin portion 20 increases slightly from the back side of the basin portion 20 to the front side. With this configuration, the front surface 24 of the basin portion 20 and the underside 42 of the water discharger portion 40 can be formed by a first mold that moves from the back side of the basin portion 20 to the front side (in the direction of arrow D1). Therefore, for example, the front surface of the basin portion and the underside of the water discharger portion can be manufactured more easily than if they were formed by a mold that moves in multiple directions.

[0036] Bowl portion 20 has rear wall portion 25K and rear wall portion 28 standing on the rear side of rear wall portion 25K. Rear wall portion 25K forms rear surface 25. An opening 49 is formed in rear wall portion 28. Opening 49 opens water discharge portion 40 to the rear of rear wall portion 28. The rear side of curved surface 46 is formed in a position that overlaps with opening 49 in the front-to-rear direction. With this configuration, the water discharge portion 40, curved surface 46, and rear wall portion 28 can be formed by a second mold that moves from the front side of rear wall portion 28 to the rear side (in the direction of arrow D2).

[0037] A drain outlet 51 is formed in the bottom wall portion 23K. The bottom wall portion 23K forms the bottom surface 23. The peripheral portion of the drain outlet 51 is formed by a drain outlet curved surface 52. The drain outlet curved surface 52 is curved from the outside to the inside in the radial direction. The width dimension B2 of the front portion of the drain outlet curved surface 52 is smaller than the width dimension B3 of the rear portion. With this configuration, the peripheral portion of the drain outlet 51 can be formed by a first mold that moves from the back side of the bowl portion 20 to the front side.

[0038] The hand washing device 10 is disposed above the toilet flushing tank 11. With this configuration, the toilet 12 equipped with the toilet flushing tank 11 can be easily cleaned.

[0039] <Embodiment 2> A hand washing device 80 according to a second embodiment will be described with reference to Figures 8 and 9. The hand washing device 80 differs from the first embodiment in that the mesh portion 81 of the drain outlet 51 is integrally molded with the bottom wall portion 23K. The same components as those in the first embodiment are given the same reference numerals, and redundant explanations will be omitted.

[0040] Similar to the first embodiment, the hand washing device 80 includes an integrally molded basin portion 20, a water discharge portion 40, and a drain pipe portion 50. The drain outlet 51 is an opening at the upper end of the drain pipe portion 50.

[0041] As shown in Figure 9, an inclined surface 82 is formed around the drain outlet 51. The inclined surface 82 slopes downward from the outside toward the inside (toward the drain outlet 51) in the radial direction of the drain outlet 51. The inclination angle of the portion of the inclined surface 82 in front of the drain outlet 51 is equal to the inclination angle α1 of the front surface 24 of the bowl portion 20. The width dimension B4 of the portion of the inclined surface 82 in front of the drain outlet 51 is larger than the width dimension B5 of the rear side in a plan view. The width dimensions B4 and B5 are dimensions parallel to the XZ plane.

[0042] The mesh portion 81 has two rod-shaped portions 83 that cross the drain opening 51. The rod-shaped portions 83 extend along the bottom surface 23. The rod-shaped portions 83 have a vertical rod 84 and a horizontal rod 85. The vertical rod 84 extends in the front-to-back direction. The horizontal rod 85 extends in the left-to-right direction. The vertical rod 84 and the horizontal rod 85 are perpendicular to each other.

[0043] As shown in FIG. 9, the vertical bar 84 is bent at its midpoint in the longitudinal direction. The front portion 86 of the vertical bar 84 slopes downward from its front end toward its midpoint 87. The midpoint 87 is located at the lowest point of the vertical bar 84. The inclination angle of the front portion 86 of the vertical bar 84 is equal to the inclination angle α1 of the front surface 24 of the bowl portion 20. The rear portion 88 of the vertical bar 84 slopes upward from the midpoint 87 toward its rear end. The upper surface of the horizontal bar 85 has a front inclined surface 85A and a rear inclined surface 85B. The inclination angles of the front inclined surface 85A and the rear inclined surface 85B are angles that can be formed by a first mold moving in the direction of arrow D1. The width dimension (front-to-rear dimension) of the front inclined surface 85A is greater than the width dimension of the rear inclined surface 85B.

[0044] As described above, in this embodiment, similar to the first embodiment, the bowl portion 20 and the water discharge portion 40 are integrally formed, which improves cleaning properties.

[0045] The bottom wall portion 23K has a mesh portion 81 of the drain outlet 51. The bottom wall portion 23K and the mesh portion 81 are formed integrally. With this configuration, it is possible to prevent solid objects from falling into the drain outlet 51 without disposing a separate hair catcher at the drain outlet 51.

[0046] The rod-shaped portion 83 of the mesh portion 81 is provided along the bottom surface 23. Therefore, the mesh portion 81 can be easily reached with the fingers, making it easy to remove dirt and the like that has accumulated on the mesh portion 81, and it is easy to wipe off any slippage.

[0047] <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-described second embodiment, the shape of the mesh portion 81 is exemplified. However, the shape of the mesh portion can be changed. For example, the hand washing device 80 may be provided with a mesh portion 91 as shown in Figures 10 and 11. The mesh portion 91 has a plurality of vertical bars 92 and a plurality of horizontal bars 93. The vertical bars 92 and horizontal bars 93 are inclined at the same gradient as the inclined surface 82. The mesh portion 91 has a finer mesh than the mesh portion 81 of the second embodiment. (2) In the above-mentioned second embodiment, the shape of the mesh portion 81 is exemplified. However, the shape of the mesh portion can be changed. For example, the hand washing device 80 may be provided with a mesh portion 94 as shown in Figures 12 and 13. The mesh portion 94 has a plurality of rod-shaped portions 95 extending radially from the center of the drain outlet 51. A ring-shaped portion 96 is provided in the center of the mesh portion 94. The center of the ring-shaped portion 96 is a through-hole 97. The ring-shaped portion 96 and the rod-shaped portions 95 are inclined at a gradient equal to that of the inclined surface 82. The mesh portion 94 has a finer mesh than the mesh portion 81 of the second embodiment. (3) In the second embodiment, the shape of the mesh portion 81 is exemplified. However, the shape of the mesh portion can be changed. For example, the hand washing device 80 may be provided with a mesh portion 98 as shown in Figures 14 and 15. The mesh portion 98 has a plurality of vertical bars 99 arranged side by side. The front and rear portions of the vertical bars 99 are inclined at the same gradient as the inclined surface 82. (4) In the above embodiment, the hand washing device 10, 80 is disposed above the toilet flushing tank 11. However, the hand washing device may be disposed above a cabinet or in an independent hand washing area. (5) In the above embodiment, the front surface 24 of the bowl portion 20 and the underside 42 of the water discharge portion 40 are parallel. However, this is not limited to this, and the front surface of the bowl portion and the underside of the water discharge portion may be inclined so that the distance between them increases from the back side to the front side. (6) In the above embodiment, almost the entire rear side of the curved surface 46 can be seen from behind through the opening 49. However, this is not limited to this, and it is also possible to make only the portion of the rear side of the curved surface that is formed by the mold that is punched rearward visible through the opening. (7) In the above embodiment, the water discharger 40 does not protrude above the upper end of the basin 20. However, the invention is not limited to this, and the water discharger may protrude above the top surface or rear surface of the basin. (8) In the above embodiment, the upper surface 41, lower surface 42, and left and right side surfaces 43 of the water discharger 40 are integrally formed. However, this is not limited to this, and the upper surface of the water discharger may be formed separately. Alternatively, only the portion of the water discharger that is continuous with the inner circumferential surface of the bowl may be integrally formed. (9) In the above embodiment, an upper surface portion may be formed that connects the upper end of the inner peripheral wall portion 21 and the upper end of the outer peripheral wall portion 22. (10) In the above embodiment, the portion of the front surface 24 above the curved surface at the lower end is formed to be substantially flat. However, the portion of the front surface above the curved surface at the lower end may be formed to be a curved surface. (11) In the above embodiment, the curved surface 46 is U-shaped when viewed from the front. However, the present invention is not limited to this, and the curved surface may be formed around the entire periphery of the water discharger. (12) In the above embodiment, the entire periphery of the opening 49 is closed. However, this is not limitative, and the opening may be formed in a notched shape. [Explanation of symbols]

[0048] 10, 80...Hand washing device, 11...Toilet flush tank, 20...Bowl, 23...Bottom, 24...Front, 25...Rear, 28...Rear wall, 40...Spout, 42...Bottom (opposing surface), 43...Left and right side surfaces, 46...Curved surface, 49...Opening, 51...Drain, 52...Curved surface of drain, 81, 91, 94, 98...Mesh, B2...Width dimension of the front part of the curved surface of the drain (diameter dimension of the drain), B3...Width dimension of the rear part (diameter dimension of the drain of other parts), W...Spacing in opposing directions

Claims

1. The bowl and a water discharge portion formed integrally with the bowl portion and protruding from the bowl portion, The bowl portion has a bottom surface, a front surface, a rear surface, and left and right side surfaces, The water discharge portion protrudes forward from the rear surface, The boundary between the water discharge portion and the bowl portion is continuous by a curved surface, The bowl portion has a rear wall portion that forms the rear surface and a back wall portion that stands on the rear side of the rear wall portion, an opening is formed in the rear wall portion to open the water discharge portion rearward of the rear wall portion; A hand washing device in which at least a portion of the rear side of the curved surface is formed in a position that overlaps with the opening in the front-to-back direction.

2. The bowl and a water discharge portion formed integrally with the bowl portion and protruding from the bowl portion, The bowl portion has a bottom surface, a front surface, a rear surface, and left and right side surfaces, The water discharge portion protrudes forward from the rear surface, A drain port is formed in a bottom wall portion that forms the bottom surface, The peripheral edge of the drain outlet is formed by a drain outlet curved surface that curves from the outside to the inside in the radial direction of the drain outlet, A hand washing device in which the radial dimension of the drain outlet in the front part of the curved drain outlet surface is smaller than the radial dimension of the drain outlet in other parts.

3. The bowl and a water discharge portion formed integrally with the bowl portion and protruding from the bowl portion, The bowl portion has a front surface, The distance between the front surface and the opposing surface of the water discharger that faces the front surface is equal or wider from the back side of the bowl portion to the front end of the front surface, The facing surface has a water discharge opening.

4. The bowl and a water discharge portion formed integrally with the bowl portion and protruding from the bowl portion, The bowl portion has a front surface, a rear surface, and left and right side surfaces, The water discharge portion protrudes from the rear surface and is disposed at a distance from the side surface, A hand washing device in which the side and underside of the water outlet protrude from the rear surface and are continuous with the rear surface by a curved surface.

5. The hand washing device according to any one of claims 1 to 4, wherein the boundary between the water discharge portion and the basin portion is continuous by a curved surface.

6. The bowl portion has a bottom surface, a front surface, a rear surface, and left and right side surfaces, The hand washing device according to claim 4 , wherein the water discharge portion protrudes forward from the rear surface.

7. The hand washing device according to claim 4, wherein the distance between the front surface and the opposing surface of the water outlet portion that faces the front surface is either wider or equal from the back side of the basin portion to the front side.

8. The bottom wall portion has a mesh portion of the drain outlet, The hand washing device according to claim 2, wherein the bottom wall portion and the mesh portion are integrally formed.

9. The hand washing device according to any one of claims 1 to 8, which is arranged above the toilet flushing tank.

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