JP7847434B2 - Toilet handwashing device and toilet bowl - Google Patents

Description

This disclosure relates to a handwashing device for toilets.

For example, the toilet handwashing device described in Patent Document 1 below comprises a basin and a water outlet. The water outlet is located above the basin, and water flows out from an outlet formed in the water outlet towards the bottom of the basin.

Japanese Patent Publication No. 2017-119987

In toilet handwashing systems, after the water flow is stopped, water from the outlet drips down onto the basin, which detracts from the sense of luxury. Therefore, improvement was desired.

This disclosure was completed based on the circumstances described above, and aims to provide a toilet handwashing device that prevents water from dripping down the basin after the water flow has been stopped.

The hand-washing device for toilets according to this disclosure comprises a bowl, an outlet portion with a water outlet formed on its tip surface for discharging water toward the bowl, and a wall portion with an opening facing outward toward the outlet, wherein the tip surface of the outlet portion protrudes outward from the outer surface of the wall portion.

Perspective view showing a toilet handwashing device installed on top of the toilet flushing tank. Front view showing a handwashing device for a toilet. Rear view showing toilet handwashing device Cross-sectional view showing a handwashing device for a toilet. Enlarged cross-sectional view of a toilet handwashing device showing the vicinity of the outlet. Enlarged view of a portion of a toilet handwashing device, seen in the direction of arrow A in Figure 5, near the outlet. Side view showing the water passage section Front view showing the water passage section Enlarged rear view of a toilet handwashing device showing how the water passage is retracted through the opening.

<Implementation>
As shown in Figure 1, the toilet handwashing device 10 is attached as a lid to the upper side of the toilet flushing tank 11. The toilet flushing tank 11 is located at the rear of the toilet bowl 12. The toilet flushing tank 11 stores the flushing water supplied to the toilet bowl 12.

In the following explanation, the upper side of 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, and the rear side as the rear. When viewing the toilet handwashing device 10 from the front, the right side will be the right side and the left side as the left side. In the diagram, the positive X-axis direction is the front, the negative X-axis direction is the rear, the positive Y-axis direction is the upper side, the negative Y-axis direction is the lower side, the positive Z-axis direction is the right side, and the negative Z-axis direction is the left side.

As shown in Figures 1 to 4, the toilet handwashing device 10 comprises a basin 20, a water outlet 30, and a water passage 50. The water outlet 30 discharges a portion of the water supplied from outside the toilet flushing tank 11 via the water passage 50 into the basin 20. The water received in the basin 20 is discharged through a drain opening 21 formed on the bottom surface 25 of the basin 20 and stored in the toilet flushing tank 11. The drain opening 21 has a cylindrical circumferential surface 21M. The circumferential surface 21M extends vertically downward from the bottom surface 25.

The bowl portion 20 and the water outlet 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 portion 26. The height of the rear portion 23 is greater than the height 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 portion 26 surrounds the outer circumference of the bowl portion 20. The outer peripheral portion 26 includes a front portion 27, a rear portion 28, and left and right outer surface portions 29.

As shown in Figure 2, the water outlet 30 is located in the center of the bowl portion 20 in the left-right direction. The water outlet 30 is positioned at the upper end of the rear surface portion 23 of the bowl portion 20. The water outlet 30 is shaped as a portion of the rear surface portion 23 of the bowl portion 20 protruding forward (see Figure 4).

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

The outer surface 31S of the front wall portion 31 faces the bowl portion 20, as shown in Figure 4. The outer surface 31S of the front wall portion 31 is an inclined surface that slopes downward toward the rear. The outer surface 31S of the front wall portion 31 faces the front portion 22 of the bowl portion 20. The front wall portion 31 and the front portion 22 are approximately parallel. The front wall portion 31 has a water discharge opening (referred to as the water discharge opening 35) that exposes the outlet 51 formed on the tip surface 53F of the water passage portion 50. The water discharge opening 35 is circular when viewed from the front in the direction of the flow path (see Figure 6). The water discharge portion 30 discharges water downward from the outlet 51.

The area of the inner surface 31U of the front wall portion 31, along the circumferential surface 36 of the water discharge opening 35, is a recessed portion 37, as shown in Figure 5. The recessed portion 37 has a sealing surface 38 that adheres closely to the sealing member 52, which will be described later. The sealing surface 38 is annular in shape (see Figure 9).

The interior of the water outlet section 30 is the upper part of the storage space 39 that houses the water passage section 50, as shown in Figure 4. The upper part of the storage space 39 is enclosed by the front wall section 31, the cover 45 (described later), the upper wall section 34, and the left and right side walls 33. The lower part of the storage space 39 is formed between the rear surface section 23 and the rear wall section 32 of the pot section 20. The storage space 39 extends laterally between the rear surface section 23 and the rear wall section 32 of the pot section 20 and is open downwards. The storage space 39 is provided with a boss 41 for fixing the water passage section 50 (see Figure 9). The boss 41 protrudes rearward from the inner surface 31U of the front wall section 31.

As shown in Figure 3, an opening 44 is formed in the rear wall portion 32. The opening 44 opens the storage space 39 to the rear of the rear wall portion 32. The entire circumference of the opening 44 is closed. The opening 44 is rectangular in shape. The left-right dimension of the opening 44 is larger than the up-down dimension of the opening 44. The opening 44 is closed by a cover 45 (see Figure 4). When attached to the opening 44, the cover 45 constitutes a part of the rear wall portion 32.

As shown in Figure 4, the water passage section 50 is housed in the storage space 39. The water passage section 50 is made of a hard material such as synthetic resin. The water passage section 50 is fixed to the boss 41 of the storage space 39 by a fastener 42 (see Figure 3). The lower end of the water passage section 50 is connected to a water supply pipe (not shown) inside the toilet flushing tank 11.

As shown in Figure 4, the water passage section 50 has a first water passage section 66 extending rearward from the outlet 51, and a second water passage section 67 extending downward along the back surface of the bowl section 20 from the rear end of the first water passage section 66. The first water passage section 66 and the second water passage section 67 are approximately perpendicular to each other.

As shown in Figure 4, the first water passage section 66 has an outlet section 53. The outlet section 53 is provided at the front end of the first water passage section 66 and protrudes downward. The outlet section 53 has an outlet 51 and an outlet passage 55. The outlet 51 opens onto the front end surface 53F of the outlet section 53. The outlet passage 55 extends diagonally upward from the outlet 51.

The first water passage section 66 has a first water channel 57 that connects to the upstream end of the outflow channel 55. The first water channel 57 extends approximately horizontally from the upstream end of the outflow channel 55 toward the rear. The flow area of the first water channel 57 narrows as it moves from the upstream side to the downstream side.

In the second water passage section 67, a second water passage 58 is formed, extending approximately vertically downward from the upstream end of the first water passage 57. The flow area of the second water passage 58 is narrower downstream than upstream.

The water passage section 50 is formed by connecting two members that are divided in the direction of the flow path. The two members are a first member 61, which includes the outflow section 53, and a second member 62, which is connected to the rear side of the first member 61. The first member 61 and the second member 62 are connected to each other and fixed with adhesive.

As shown in Figure 5, the outlet section 53 has a tip section 53A and a rear section 53B that follows behind the tip section 53A. The tip section 53A penetrates the water discharge opening 35 and protrudes outward from the front wall section 31. The rear section 53B is located in the storage space 39. The rear section 53B has a sealing surface 59 that is in close contact with the sealing member 52. The sealing surface 59 forms an annular shape surrounding the outer circumferential surface of the tip section 53A (see Figure 8).

As shown in Figure 7, the sealing member 52 is provided at the front end of the water passage section 50. The sealing member 52 has an annular shape surrounding the tip 53A of the outlet section 53. The sealing member 52 is interposed between the sealing surface 59 of the rear section 53B and the sealing surface 38 of the peripheral edge of the water discharge opening 35 (see Figure 5).

As shown in Figure 5, the tip surface 53F of the outflow section 53 protrudes outward from the outer surface 31S of the front wall section 31. The tip surface 53F of the outflow section 53 is approximately parallel to the outer surface 31S of the front wall section 31. The tip surface 53F of the outflow section 53 is inclined with respect to the flow direction of the outlet 51. In other words, the intersection angle 53α between the tip surface 53F of the outflow section 53 and the center line 51L extending in the flow direction through the center 51C of the outlet 51 is an angle different from 90 degrees. The intersection angle 53α shown in Figure 5 is less than 90 degrees.

As shown in Figure 5, the outer edge of the tip surface 53F of the outflow section 53 is rounded. The rounding is formed around the entire circumference of the outer edge. The upper region of the outer edge of the tip surface 53F of the outflow section 53 has a gentler curve than the lower region. The lower region of the outer edge of the tip surface 53F of the outflow section 53 has a sharper curve than the upper region.

The radius of curvature R of the rounded edge is smaller on the lower side of the outer edge than on the upper side. The radius of curvature R is the radius of curvature in the cross-section that extends in the flow direction through the center 51C of the outlet 51. The upper region of the outer edge of the tip surface 53F is the region of the outer edge of the tip surface 53F that is above the height of the center 51C of the outlet 51. The lower region of the outer edge of the tip surface 53F is the region of the outer edge of the tip surface 53F that is below the height of the center 51C of the outlet 51. The radius of curvature R of the outer edge of the tip surface 53F of the outflow section 53 gradually decreases from the upper end of the outer edge to the lower end of the outer edge.

As shown in Figures 5 and 6, the outflow section 53 has multiple plate sections 71. These plate sections 71 radiate from a cylindrical section 78 formed in the center of the outflow passage 55, extending in the direction of the outflow passage 55's flow path. Each plate section 71 extends from the vicinity of its tip surface 53F to the first water channel 57. As shown in Figure 6, the plate sections 71 are arranged at equal angular intervals around the cylindrical section 78. Below the outlet 51, a space 72 is located between adjacent plate sections 71.

As shown in Figure 6, when viewing the outlet 51 from the direction of arrow A in Figure 5, the center 51C of the outlet 51 and the center 35C of the water discharge opening 35 are the same. Arrow A points from front to back in a direction parallel to the flow direction of the outflow passage 55.

As shown in Figure 4, the outlet 51 discharges water towards the bowl section 20. The main stream of water discharged from the outlet 51 collides with the front surface of the circumferential surface 21M of the drain outlet 21, as indicated by the arrows in Figure 4. In other words, the majority of the water discharged from the outlet 51 (the largest amount of water) collides with the front surface of the circumferential surface 21M of the drain outlet 21. A portion of the water discharged from the outlet 51 (a smaller amount of water) may collide with other parts. The front surface of the circumferential surface 21M of the drain outlet 21 is the front region when the circumferential surface 21M of the drain outlet 21 is divided into front and rear sections based on the center in the front-to-back direction.

As shown in Figure 7, an upper rib 76 projecting upward is provided on the upper surface of the first water passage section 66. The upper rib 76 is formed on the upper surface of the outlet section 53. When viewed from the left or right, the upper rib 76 has a triangular shape. The upper surface of the upper rib 76 is approximately parallel to the portion of the upper surface of the first water passage section 66 that is behind the outlet section 53.

As shown in Figure 8, the upper rib 76 is positioned in the left-right center of the first water passage section 66. A protruding portion 77 is provided on the upper surface of the upper rib 76. The protruding portions 77 extend outwards from both the left and right sides of the upper rib 76.

The second water passage section 67 has an upper section 67A and a lower section 67B. The outer shape of the upper section 67A is a rectangular prism, as shown in Figure 9. The outer shape of the lower section 67B is cylindrical. A flange 75 is provided between the upper section 67A and the lower section 67B.

As shown in Figure 7, a lower rib 73 is provided on the front surface of the second water passage section 67, projecting forward. The lower rib 73 extends downward from the flange 75. The front surface of the lower rib 73 slopes forward from the top to the bottom. A projection 74 is formed on the front surface of the lower rib 73. The projection 74 is located at the lower end of the lower rib 73. The projection 74 has a rounded, dome shape. As shown in Figure 8, the lower rib 73 is positioned in the center of the second water passage section 67 in the left-right direction. The lower rib 73 extends linearly in the vertical direction.

As shown in Figures 3 and 7, the length L1 of the second water passage 67 is greater than the maximum opening width L2 of the opening 44. The length L1 of the second water passage 67 is the length from the upper end to the lower end of the second water passage 67. The maximum opening width L2 of the opening 44 is the length of the diagonal of the opening 44.

As shown in Figure 9, the water-conducting section 50 is positioned in the storage space 39 through the opening 44. Specifically, the water-conducting section 50 is inserted into the storage space 39 from its lower end first, in an inclined position along the diagonal of the opening 44.

The second water passage section 67 has a fixing section 68 that is fixed to the boss 41 of the front wall section 31 by a fixing device 42. The fixing section 68 is provided on the upper part 67A of the second water passage section 67. As shown in Figure 8, a pair of fixing sections 68 are provided on the left and right sides. The fixing section 68 is cylindrical in shape, housing the fixing device 42 inside.

The embodiment configured as described above provides the following effects. The toilet handwashing device 10 comprises a basin 20, an outlet 53, and a front wall 31. An outlet 51 is formed on the tip surface 53F of the outlet 53, which discharges water towards the basin 20. A water discharge opening 35 is formed on the front wall 31, facing the outlet 51 outwards. The tip surface 53F of the outlet 53 protrudes outwards from the outer surface 31S of the front wall 31. With this configuration, when the water flow is stopped, the water remaining in the outlet 51 tends to fall straight down from the tip surface 53F of the outlet 53. Therefore, after stopping the water flow, the water in the outlet 51 is less likely to run down into the basin 20.

In the cross-section of the outlet 51, which extends in the flow direction through the center 51C, the radius of curvature R of the outer edge of the tip surface 53F of the outflow section 53 is smaller on the rear side than on the front side. With this configuration, since the rear side of the outer edge of the tip surface 53F of the outflow section 53 is more pointed than the front side, when the water flow is stopped, the water remaining in the outlet 51 tends to fall straight down from the tip surface 53F of the outflow section 53. Therefore, after stopping the water flow, it is less likely for the water in the outlet 51 to run down into the bowl section 20. On the other hand, since the radius of curvature R on the front side of the outer edge of the tip surface 53F is large, it is less likely for a rag or other cleaning tool to get caught on the outer edge of the tip surface 53F during cleaning.

The outer surface 31S of the front wall portion 31 is inclined downward toward the rear. The radius of curvature R of the outer edge of the tip surface 53F of the outflow portion 53 gradually decreases from the upper end to the lower end of the outer edge. This configuration improves the appearance of the toilet handwashing device 10 when viewed from the front.

The tip surface 53F of the outflow section 53 is inclined with respect to the flow direction of the outlet 51. This configuration allows the tip surface 53F of the outflow section 53 to be parallel to the outer surface 31S of the front wall section 31. Therefore, the aesthetic design of the toilet handwashing device 10 can be improved.

The main stream of water flowing out from the outlet 51 collides with the front surface of the drain opening 21 formed in the basin 20. This configuration prevents water from splashing outside the basin 20, thus improving the user experience of the toilet handwashing device 10.

When viewing the outlet 51 from the front in the direction of the flow path, the center 51C of the outlet 51 and the center 35C of the water discharge opening 35 are the same. This configuration improves the appearance of the toilet handwashing device 10 when viewed from the front.

The toilet handwashing device 10 has a water passage section 50 that passes water through the outlet 51. The water passage section 50 has a first water passage section 66 that extends rearward from the outlet 51, and a second water passage section 67 that extends downward from the rear end of the first water passage section 66 along the back surface of the basin section 20. A lower rib 73 that protrudes forward is provided on the front surface of the second water passage section 67. With this configuration, when attaching the water passage section 50 to the back side of the basin section 20, the water passage section 50 can be easily attached by bringing the lower rib 73 into contact with the back surface of the basin section 20. When the front end surface 53F of the outflow section 53 is pushed to the rearward side during cleaning, etc., the lower rib 73 will come into contact with the back surface of the basin section 20, preventing the water passage section 50 from rattling. In this case, because an upper rib 76 is provided on the upper surface of the first water passage section 66, the upper rib 76 may come into contact with the upper wall 34 of the water discharge section 30. The upper rib 76, together with the lower rib 73, prevents rattling of the water passage 50.

The water passage section 50 has an outflow channel 55 that extends diagonally upward from the outlet 51. The outflow channel 55 has multiple plate sections 71. These plate sections 71 radiate from the center of the outflow channel 55 in the direction of the flow path. A space 72 is located below the outlet 51. The space 72 is formed between adjacent plate sections 71. This configuration prevents water from the outlet 51 from adhering to the plate sections 71 due to surface tension, thus improving drainage of the outlet 51. Therefore, water from the outlet 51 is less likely to run down onto the bowl section 20.

<Other Embodiments>
This disclosure is not limited to the embodiments described above and in the drawings, and the technical scope of this disclosure also includes, for example, the following embodiments.
(1) In the above embodiment, the outlet section 53 is formed integrally with the water passage section 50. However, the outlet section may be molded separately from the water passage section. In this case, the outlet section may be attached to the water discharge opening from the front of the front wall section.
(2) In the above embodiment, the water passage section 50 is stored in the storage space 39 through the opening 44 in the rear wall section 32. However, the water passage section may be stored in the storage space from any direction as long as it is on the rear side of the front wall section. For example, the water passage section may be stored in the storage space from below, or from either the left or right direction.
(3) In the above embodiment, the water passage section 50 has two members divided in the direction of the flow path. However, the water passage section does not have to be divided in the direction of the flow path, or it may have three or more members divided in the direction of the flow path.
(4) 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.
(5) In the above embodiment, the outflow passage 55 extends diagonally upward from the outlet 51. However, the outflow passage may extend vertically, or horizontally, for example.
(6) In the above embodiment, the tip surface 53F of the outlet section 53 is inclined with respect to the flow direction of the outlet 51. However, the tip surface of the outlet section may be perpendicular to the flow direction of the outlet.
(7) In the above embodiment, the water flowing out from the outlet 51 collides with the front surface inside the drain opening 21 formed in the bowl portion 20. However, the water flowing out from the outlet may collide with any position near the drain opening.
(8) In the above embodiment, when the outlet 51 is viewed from the front in the flow direction of the outlet 51, the center 51C of the outlet 51 and the center 35C of the water discharge opening 35 are the same. However, the center of the outlet and the center of the water discharge opening may be offset from each other.
(9) In the above embodiment, a lower rib 73 is provided on the front surface of the second water passage 67. However, it is not limited to this, and a rib does not have to be provided on the front surface of the second water passage, and the position and shape of the rib may be changed according to the shape of the water passage.
(10) In the above embodiment, the radius of curvature R of the outer edge of the tip surface 53F of the outflow section 53 gradually decreases from the upper end of the outer edge to the lower end of the outer edge. However, the radius of curvature of the outer edge of the tip surface of the outflow section does not have to continue to change gradually from the upper end of the outer edge to the lower end of the outer edge. For example, the radius of curvature of the outer edge of the tip surface of the outflow section may have a portion that does not change between the upper end of the outer edge and the lower end of the outer edge, or it may have a portion that changes abruptly.

R…Radius of curvature, 10…Toilet handwashing device, 20…Bowl section, 21…Drain opening, 31…Front wall section (wall section), 31S…Outer surface of front wall section, 35…Water discharge opening, 35C…Center of water discharge opening, 50…Water passage section, 51…Outlet, 51C…Center of outlet, 53…Outlet section, 53F…Tip surface, 55…Outlet passage, 66…First water passage section, 67…Second water passage section, 71…Plate section, 72…Space section, 73…Lower rib (rib)

Claims (9)

The pot part,
An outlet is formed on the tip surface of the outlet through which water flows out toward the aforementioned bowl portion,
It has a wall portion having an opening that faces outwards towards the outlet,
The tip of the outlet section where the outlet is formed penetrates the opening, and the tip surface protrudes outward from the outer surface of the wall section .
A hand-washing device for a toilet , wherein, in a cross-section extending in the flow direction through the center of the outlet, the radius of curvature of the outer edge of the leading surface of the outlet is smaller on the rear side of the outer edge than on the front side of the outer edge . The pot part,
An outlet is formed on the tip surface of the outlet through which water flows out toward the aforementioned bowl portion,
It has a wall portion having an opening that faces outwards towards the outlet,
The tip surface of the outflow section protrudes outward from the outer surface of the wall section.
The main stream of water flowing out from the outlet collides with the front surface of the drain opening formed in the bowl .
A hand-washing device for a toilet , wherein, in a cross-section extending in the flow direction through the center of the outlet, the radius of curvature of the outer edge of the leading surface of the outlet is smaller on the rear side of the outer edge than on the front side of the outer edge . The pot part,
An outlet is formed on the tip surface of the outlet through which water flows out toward the aforementioned bowl portion,
It has a wall portion having an opening that faces outwards towards the outlet,
The tip of the outflow section penetrates the opening with a gap between it and the opening, and the tip surface protrudes outward from the outer surface of the wall section .
A hand-washing device for a toilet , wherein, in a cross-section extending in the flow direction through the center of the outlet, the radius of curvature of the outer edge of the leading surface of the outlet is smaller on the rear side of the outer edge than on the front side of the outer edge . The outer surface of the aforementioned wall is inclined downward toward the rear.
A toilet handwashing device according to any one of claims 1 to 3, wherein the radius of curvature of the outer edge of the leading surface of the outflow portion in a cross section that extends in the flow direction through the center of the outlet gradually decreases from the upper end of the outer edge to the lower end of the outer edge . The toilet handwashing device according to any one of claims 1 to 4 , wherein the tip surface of the outlet is inclined with respect to the flow direction of the outlet . A toilet handwashing device according to any one of claims 1 to 5, wherein the center of the outlet and the center of the opening are the same when the outlet is viewed from the front in the direction of the flow path of the outlet . The outlet has a water passage section for passing water through it,
The water passage section has a first water passage section extending rearward from the outlet, and a second water passage section extending downward along the back surface of the bowl section from the rear end of the first water passage section.
A toilet handwashing device according to any one of claims 1 to 6, wherein a rib protruding forward is provided on the front surface of the second water passage section . The outlet has a water passage section for passing water through it,
The water passage section has an outflow channel that extends diagonally upward from the outlet,
The outflow channel has a plurality of plate portions that radiate from the center of the outflow channel and extend in the direction of the flow path of the outflow channel,
A toilet handwashing device according to any one of claims 1 to 7, wherein a space formed between adjacent plate portions is located below the outlet . A toilet equipped with a toilet flushing tank fitted with a toilet handwashing device according to any one of claims 1 to 8 .