Washbasin and sink

Abstract

To smoothly discharge dirt into an exhaust hole.SOLUTION: In a wash basin 12 including a bottom part 31 and a lateral face part 32 surrounding the bottom part 31, the bottom part 31 includes: an exhaust hole 43; a bottom surface 41 extending from the lateral face part 32 toward the exhaust hole 43 in the front-back direction; and a groove surface 42 that is connected to the bottom surface 41 in the front-back direction, is lower than the bottom surface 41, extends in a left-right direction orthogonal to the front-back direction relative to the exhaust hole 43, and is inclined downward toward the exhaust hole 43. The groove surface 42 has a region T1 which protrudes toward the side of the bottom surface 41 relative to the front-back direction passing the center of the exhaust hole 43, and the border between the groove surface 42 and the bottom surface 41 in the protruding region T1 has a distance L1 from the center of the exhaust hole 43 in a direction at a first angle α1 relative to the front-back direction, and a distance L2, which is larger than the distance L1, from the center of the exhaust hole 43 in a direction at a second angle α2, which is larger than the first angle, relative to the front-back direction.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a washbasin and a washstand.

Background Art

[0002] Patent Document 1 discloses a washstand in which water is drained at a drain outlet. In Patent Document 1, a flat portion is provided on the front side surface at the bottom surface of the bowl portion, and a groove portion is provided on the rear side surface. It is described that the water discharged onto the flat portion flows from the flat portion to the groove portion and then from the groove portion to the drain outlet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the structure of Patent Document 1, for example, water flowing from the right direction to the drain outlet side in the groove portion and water flowing from the left direction to the drain outlet side in the groove portion may collide between the drain outlet and the rear side surface, and dirt may adhere to the rear side surface. In a washbasin, it is required to smoothly drain dirt to the drain outlet in order to maintain cleanliness.

[0005] In view of the above problems, an object of the present invention is to provide a washbasin and a washstand that can smoothly flow dirt to a drain outlet.

Means for Solving the Problems

[0006] To solve the above problems, a washbasin according to a first aspect of the present disclosure is a washbasin including a bottom and a side portion surrounding the bottom, wherein the bottom includes a drain, a bottom surface extending in a first direction toward the drain from the side portion, and a groove surface connected to the bottom surface in the first direction and lower than the bottom surface, extending in a second direction perpendicular to the first direction toward the drain, and inclined downward toward the drain, wherein the groove surface has a region that protrudes toward the bottom surface with respect to the first direction passing through the center of the drain, and the distance from the boundary between the groove surface and the bottom surface in the protruding region is greater in the direction of a second angle greater than the first angle toward the first direction than the distance from the center of the drain in the direction of a first angle toward the first direction.

[0007] In this configuration, in the protruding region of the groove surface, the distance between the center of the drain opening and its boundary in the second angle direction is greater than the distance between the center of the drain opening and its boundary in the first angle direction. As a result, the amount of water that flows directly into the drain opening increases. In other words, the amount of water that splashes before entering the drain opening is suppressed. Also, the energy of collisions between water particles before they enter the drain opening is reduced, suppressing water splashing. As a result, the splashing of dirt is suppressed, and dirt can be smoothly washed into the drain opening.

[0008] Furthermore, in the washbasin according to the second aspect of this disclosure, the boundary between the groove surface and the bottom surface in the protruding region is wider in the second direction corresponding to the second position which is closer to the center of the drain opening than the first position in the first direction than the width in the second direction corresponding to the first position in the first direction.

[0009] This configuration increases the amount of water that flows directly into the drain, suppresses the scattering of dirt, and allows dirt to flow smoothly into the drain.

[0010] Furthermore, in the washbasin according to the third aspect of this disclosure, the boundary in the protruding region has a linear shape on both sides of the position of the center of the drain in the second direction, and the width between the linear shapes is wider the closer the position is to the center of the drain in the first direction.

[0011] This configuration, with its linear shape, effectively increases the amount of water that flows directly into the drain, suppresses the scattering of dirt, and allows dirt to flow smoothly into the drain.

[0012] Furthermore, in the washbasin according to the fourth aspect of this disclosure, at the boundary of the protruding region, the space between the straight lines is a curved shape that extends from each of the straight lines and gradually decreases in angle with respect to the second direction.

[0013] This configuration allows both linear shapes to be connected, enabling water to be smoothly guided to the drain.

[0014] Furthermore, in the washbasin according to the fifth aspect of this disclosure, the grooved surface has a boundary shape with the bottom surface that is parallel to the second direction, on the side surface side in the second direction, more so than the protruding region.

[0015] This configuration allows water to flow smoothly towards the drain, and combined with the V-shape, it effectively guides water to the drain.

[0016] Furthermore, in the washbasin according to the sixth aspect of this disclosure, the groove surface is in contact with the side surface in the first direction, and the side surface has a protrusion that projects in the first direction between itself and the drain opening.

[0017] This configuration suppresses the energy of water collisions in the groove between the drain and the side surface, thereby reducing water splashing. As a result, the splashing of dirt is suppressed, and dirt can be smoothly drained into the drain.

[0018] Further, in the washbasin according to the seventh aspect of the present disclosure, in a plan view, the convex portion has the largest width in the first direction at the position of the drain opening in the second direction, and the width in the first direction decreases toward the second direction.

[0019] According to this configuration, the scattering of water is effectively suppressed. That is, the scattering of dirt is suppressed.

[0020] Further, the washstand according to the eighth aspect of the present disclosure includes the above-described washbasin and a faucet that discharges water to the bottom surface of the washbasin.

[0021] According to this configuration, a washstand can be configured that can smoothly flow dirt to the drain opening.

Effect of the Invention

[0022] According to the washbasin and the washstand according to the present disclosure, dirt can be smoothly flowed to the drain opening.

Brief Description of the Drawings

[0023] [Figure 1] It is a perspective view schematically showing an example of the overall configuration of a washstand according to a first embodiment of the present disclosure. [Figure 2] It is a perspective view showing a configuration example of the washbasin of FIG. 1. [Figure 3] It is a plan view showing a configuration example of the washbasin of FIG. 1. [Figure 4] It is a cross-sectional view taken along the line IV-IV of the washbasin of FIG. 3. [Figure 5] It is a cross-sectional view taken along the line V-V of the washbasin of FIG. 3. [Figure 6] It is a cross-sectional view taken along the line VI-VI of the washbasin of FIG. 3. [Figure 7] It is a cross-sectional view taken along the line VII-VII of the washbasin of FIG. 3. [Figure 8] It is a cross-sectional view taken along the line VIII-VIII of the washbasin of FIG. 3. [Figure 9] It is a plan view showing an enlarged view of the periphery of the drain opening in FIG. 3. [Figure 10] This is a plan view showing an example configuration of a reference washbasin. [Figure 11] Figure 10 is a perspective view showing an example configuration of a reference washbasin. [Figure 12] Figure 3 is a plan view showing the water flow in a washbasin. [Figure 13] This is a plan view showing an example of the configuration of a washbasin according to the second embodiment. [Figure 14] Figure 13 is a perspective view showing an example of a washbasin configuration. [Modes for carrying out the invention]

[0024] The embodiments of this disclosure will be described below with reference to the attached drawings. To facilitate understanding of the description, the same reference numerals are used for the same components in each drawing whenever possible, and redundant descriptions are omitted.

[0025] ---First Embodiment--- First, let me describe the first embodiment.

[0026] <Overall Structure> Figure 1 is a schematic perspective view showing an example of the overall configuration of a vanity unit 1 according to the first embodiment of this disclosure. As shown in Figure 1, the vanity unit 1 comprises a mirror cabinet 2 and a washbasin 3. The vanity unit 1 is installed, for example, by being fixed to the floor or wall.

[0027] As shown in Figure 1, the directions of the vanity unit 1 are set with respect to the user standing in front of it, in the left-right direction, up-down direction, and front-back direction. In this embodiment, the first direction is the front-back direction, and the second direction is the left-right direction.

[0028] The mirror cabinet 2 is located above the washbasin 3, at the back (wall side). Multiple mirrors 4 are provided on the front side of the mirror cabinet 2. The mirrors 4 can be opened and closed, and by opening the mirrors 4, the user can access the mirror cabinet 2.

[0029] The washbasin 3 is located below the mirror cabinet 2. The washbasin 3 includes a faucet 10, a cabinet 11, and a washbasin 12.

[0030] The faucet 10 is located at the bottom of the mirror cabinet 2 and is positioned in the center in the left-right direction. The position and shape of the faucet 10 are not limited. The faucet 10 is supplied with water from a pipe located, for example, at the back of the cabinet 11, and discharges water toward the washbasin 12. The faucet 10 discharges water toward the bottom surface 41, which will be described later.

[0031] Cabinet 11 is located beneath the vanity unit 1. Cabinet 11 has multiple drawers for storage. For example, drainage pipes, pipes supplying water to the faucet 10, and electrical systems are located at the back of Cabinet 11.

[0032] The washbasin 12 is located above the cabinet 11. That is, the washbasin 12 is supported by the cabinet 11. Figure 2 is a perspective view showing an example of the configuration of the washbasin 12. The washbasin 12 comprises a rim 21 and a bowl portion 22. The bowl portion 22 and the rim 21 are integrally molded from the same material. For example, this material may be ceramic or resin.

[0033] The rim portion 21 is positioned around the bowl portion 22. For example, the shape of the rim portion 21 is the same on the right and left sides. For example, the width of the front side of the rim portion 21 is narrower than the widths of the right and left sides. The top surface of the rim portion 21 is planar, and the rim portion 21 as a whole is flat.

[0034] The bowl portion 22 is positioned in the center of the washbasin 12 in the left-right direction. The bowl portion 22 has a shape that is recessed downwards from the upper surface of the rim portion 21. The bowl portion 22 comprises a bottom portion 31 and side portions 32.

[0035] The bottom portion 31 is the lowest surface of the bowl portion 22, and the bowl portion 22 is formed when the bottom portion 31 is surrounded by the side portions 32. Figure 3 is a plan view showing an example of the configuration of the washbasin 12. The bottom portion 31 is rectangular in shape. The side portions 32 include a rear side portion 32a connected to the rear end of the bottom portion 31, a front side portion 32b connected to the front end of the bottom portion 31, a left side portion 32c connected to the left end of the bottom portion 31, and a right side portion 32d connected to the right end of the bottom portion 31. Each of the rear side portion 32a, front side portion 32b, left side portion 32c, and right side portion 32d is a wall surface that extends upward from the bottom portion 31. The bottom portion 31 has a straight shape extending in the left-right direction at both the front and back ends, and a straight shape extending in the front-rear direction at both the left and right ends. The back side portion 32a, front side portion 32b, left side portion 32c, and right side portion 32d are each curved on the underside and connected to the respective ends of the bottom portion 31. The back side portion 32a and the left side portion 32c, the left side portion 32c and the front side portion 32b, the front side portion 32b and the right side portion 32d, and the right side portion 32d and the back side portion 32a are each connected by a curved shape. In this way, the bottom portion 31 and the side portions 32 form a bowl shape.

[0036] The bottom portion 31 includes a bottom surface 41, a grooved surface 42, and a drain opening 43. Figure 3 shows the bottom surface 41 with multiple points marked on it and the grooved surface 42 with parallel diagonal lines.

[0037] The bottom surface 41 extends in the left-right direction and in the front-rear direction. That is, the bottom surface 41 extends from the side surface 32 toward the drain opening 43 in the front-rear direction. The bottom surface 41 then extends toward and connects to the front side surface 32b, the left side surface 32c, and the right side surface 32d, respectively. The rear side of the bottom surface 41 is connected to the groove surface 42.

[0038] Figure 4 is a cross-sectional view of the IV-IV surface in Figure 3. Figure 5 is a cross-sectional view of the VV surface in Figure 3. Figure 6 is a cross-sectional view of the VI-VI surface in Figure 3. As shown in Figure 4, on the IV-IV surface where the drain port 43 is located, and as shown in Figures 5 and 6, on the surfaces without the drain port 43, the bottom surface 41 is inclined downward toward the groove surface 42. Specifically, the bottom surface 41 is inclined downward toward the rear. As shown in Figures 4, 5, and 6, the inclined surface of the bottom surface 41 is positioned higher than the groove surface 42. Figure 7 is a cross-sectional view of the VII-VII surface in Figure 3. As shown in Figure 7, the bottom surface 41 is not inclined in the left-right direction. Therefore, water discharged onto the bottom surface 41 flows from the front to the back along the inclination and into the groove surface 42. The left-right inclination of the bottom surface 41 is not limited to the above and may be inclined.

[0039] Returning to Figure 3, the groove surface 42 extends in the left-right direction. That is, the groove surface 42 extends in the left-right direction relative to the drain opening 43. The groove surface 42 is connected to the rear side surface 32a on the far side, the left side surface 32c on the left side, and the right side surface 32d on the right side. That is, the groove surface 42 is in contact with the rear side surface 32a of the side surface 32 in the front-rear direction. The groove surface 42 is connected to the bottom surface 41 on the near side in the front-rear direction. The width of the groove surface 42 in the left-right direction is equal to the width of the bottom surface 41 in the left-right direction. Note that the width of the groove surface 42 and the width of the bottom surface 41 may be configured to be different.

[0040] As shown in Figures 5 and 6, the groove surface 42 has a groove shape that is lower in height than the bottom surface 41. In other words, the groove surface 42 is recessed below the bottom surface 41. For example, in a cross section perpendicular to the left-right direction, the groove surface 42 has a shape that curves downward.

[0041] Figure 8 is a cross-sectional view of the VIII-VIII plane in Figure 3. In other words, Figure 8 is a diagram showing a cross-section of the groove surface 42. As shown in Figure 8, the groove surface 42 has a shape that slopes downward from the left and right ends toward the center C of the bowl portion 22. That is, the groove surface 42 is lowest at the center C. A drain outlet 43 is located at this center C. For this reason, the groove surface 42 has a shape that slopes downward toward the drain outlet 43.

[0042] Returning to Figure 3, the drain 43 is a circular hole that penetrates the bowl portion 22 downwards. The drain 43 discharges water from the washbasin 12 to the outside. The drain 43 is connected to a drain pipe. As shown in Figure 1, a drain plug 45 is inserted into the drain 43, and water flows into the drain 43 when the drain plug 45 is open. Note that by closing the drain plug 45, the drain 43 is blocked and water cannot flow into the drain 43.

[0043] <V-shaped groove surface 42> Next, we will explain the V-shape of the groove surface 42.

[0044] Figure 9 is an enlarged plan view of the area around the drain 43 in Figure 3. As shown in Figure 9, the groove surface 42 has a V-shape at its boundary with the bottom surface 41. Specifically, the groove surface 42 has a V-shape around the drain opening 43.

[0045] As shown in Figure 9, the drain opening 43 is located within the area of ​​the groove surface 42. The groove surface 42 has a region T1 that protrudes toward the bottom surface 41 in the direction from front to back, passing through the center of the drain opening 43. Thus, the groove surface 42 has a shape in which region T1 protrudes toward the front around the drain opening 43. Region T1 of the groove surface 42 is connected to the bottom surface 41 on the front side. The boundary between region T1 of the groove surface 42 and the bottom surface 41 is V-shaped, as shown in Figure 9. At the boundary between region T1 of the groove surface 42 and the bottom surface 41, the width in the left-right direction corresponding to the first position in the front-to-back direction is defined as width W1, and the width in the left-right direction corresponding to the second position in the front-to-back direction is defined as width W2. Note that the second position is closer to the center of the drain opening 43 than the first position in the front-to-back direction. With widths W1 and W2 set in this way, width W2 is wider than width W1. In other words, the width W2 of the groove surface 42 is wider than the width W1 of the region T1.

[0046] Furthermore, as shown in Figure 9, a first angle α1 direction and a second angle α2 direction are set with respect to the front-to-back direction. Note that the second angle α2 is larger than the first angle α1 with respect to the front-to-back direction. The boundary between the region T1 of the groove surface 42 and the bottom surface 41 is greater at the distance L2 from the center of the drain outlet 43 in the direction of the second angle α2 than at the distance L1 in the direction of the first angle α1. In other words, the distance between the end of the region T1 of the groove surface 42 and the center of the drain outlet 43 is greater in the direction of the second angle α2 (distance L2) than in the direction of the first angle α1 (distance L1).

[0047] Thus, in region T1, the width in the left-right direction is wider the closer the location is to the center of the drain outlet 43 in the front-to-back direction. Furthermore, the distance between the edge of region T1 and the center of the drain outlet 43 increases in the direction of a larger angle with respect to the front-to-back direction.

[0048] Furthermore, since region T1 is V-shaped, the groove surface 42 has linear shapes S1 on both sides (left and right) of the center of the drain outlet 43 in the left-right direction within region T1. Therefore, the closer the position is to the center of the drain outlet 43 in the front-back direction, the wider the width of the horizontal space between the linear shapes S1. Also, the distance between the linear shape S1 and the center of the drain outlet 43 increases in the direction of a larger angle with respect to the front-back direction.

[0049] The linear shape S1 has an angle β greater than 0 degrees with respect to the front-to-back direction. Furthermore, let M2 be the line connecting the intersection point O1 of the extension lines M1 of each linear shape S1 and the point O2 where the groove surface 42, the bottom surface 41, and the side surface 32 intersect. The angle β of the linear shape S1 with respect to the front-to-back direction is less than or equal to the angle β1 of the line M2 with respect to the front-to-back direction.

[0050] Furthermore, in region T1, the shape between the linear shapes S1 is a curved shape S2. That is, the left and right linear shapes S1 are connected by the curved shape S2. The curved shape S2 extends from each of the linear shapes S1 and its angle with respect to the left and right directions gradually decreases. As shown in Figure 9, in the front-to-back direction passing through the center of the drain opening 43, the distance between the center of the drain opening 43 and the curved shape S2 is smaller than the distance between the center of the drain opening 43 and the rear side surface 32a.

[0051] Thus, the region T1 of the groove surface 42 is a V-shaped region that protrudes toward the front in a plan view. As shown in Figure 9, the V-shaped boundary of region T1 extends toward the side portions 32 (left side portion 32c, right side portion 32d). Specifically, the boundary between the groove surface 42 and the bottom surface 41 is V-shaped in the region close to the drain outlet 43, and is a straight line shape S3 in the regions on the left and right side portions 32 side of the V-shape (region T1). The straight line shape S3 extends parallel to the left and right direction. For this reason, the width C1 of the groove surface 42 shown in Figure 5, which is a cross-sectional view of the VV surface in Figure 3, is wider than the width C2 of the groove surface 42 shown in Figure 6, which is a cross-sectional view of the VI-VI surface in Figure 3.

[0052] <Comparison with example> Next, a comparison between the washbasin 12 in this embodiment and the reference example will be explained.

[0053] Figure 10 is a plan view showing an example configuration of a reference washbasin 100, which is a washbasin in a reference example. Figure 11 is a perspective view showing an example configuration of the reference washbasin 100. The reference washbasin 100, like the washbasin 12 in this embodiment, has a bottom surface 101 and a grooved surface 102. However, the boundary of the grooved surface 102 with the bottom surface 101 around the drain 43 is an arc shape centered on the center point of the drain 43. In other words, the grooved surface 102 does not have a V-shape around the drain 43.

[0054] In the reference washbasin 100, when water is discharged into area A1 of the bottom surface 101, the water flows from the bottom surface 101 to the groove surface 102, similar to the washbasin 12. Then, in the groove surface 102, water flows from both the left and right directions toward the center (towards the drain 43). At this time, if the groove surface 102 extends parallel to the left and right directions, the direction of water flow from the right toward the center and the direction of water flow from the left toward the center may be parallel to each other but in opposite directions. In such a case, water may collide in area A2 between the drain 43 and the far side surface, causing water to splash. When water splashes, dirt that flows with the water is also scattered, and dirt may adhere to the far side surface, for example, as shown as dirt A3 in Figure 11.

[0055] In contrast, the groove surface 42 in this embodiment has a V-shape. Figure 12 is a plan view showing the water flow in the washbasin 12 of this embodiment shown in Figure 3. In Figure 12, multiple points are marked on the bottom surface 41 and parallel diagonal lines are drawn on the groove surface 42. As shown in Figure 12, in the washbasin 12 of this embodiment, water discharged from the faucet 10 lands on area B1 of the bottom surface 41. The water that lands spreads across the bottom surface 41 and flows to the groove surface 42 due to the slope. The water that flows to the groove surface 42 flows towards the drain 43 due to the slope. At this time, because the area T1 of the groove surface 42 around the drain 43 is V-shaped, the amount of water that flows directly into the drain 43 increases compared to the reference washbasin 100. As a result, the amount of water in area B2 between the drain 43 and the rear side surface does not increase easily. In other words, in region B2, the collision energy between water flowing from the right and water flowing from the left is reduced, suppressing water splashing. As a result, in the washbasin 12, compared to the reference washbasin 100, the splashing of dirt is suppressed, and the dirt can be smoothly drained into the drain 43. Furthermore, even when the water volume is low, the dirt can be smoothly drained into the drain 43. In addition, because the water is effectively guided to the drain 43, even if the water volume temporarily increases, the accumulation of water and the lifting of dirt, preventing it from adhering to the side surface 32, is suppressed.

[0056] <Effects and Effects> As described above, the washbasin 12 according to this embodiment includes a bottom portion 31 and a side portion 32 surrounding the bottom portion 31, wherein the bottom portion 31 includes a drain 43, a bottom surface 41 extending in a first direction toward the drain 43 from the side portion 32, and a groove surface 42 that is connected to the bottom surface 41 in the first direction, is lower than the bottom surface 41, extends in a second direction perpendicular to the first direction toward the drain 43, and inclined downward toward the drain 43, wherein the groove surface 42 has a region T1 that protrudes toward the bottom surface 41 with respect to the first direction passing through the center of the drain 43, and the distance L2 from the center of the drain 43 in the direction of a second angle α2 which is greater than the first angle α1 with respect to the first direction is greater than the distance L1 from the center of the drain 43 in the direction of a first angle α1 with respect to the first direction.

[0057] In this configuration, in the protruding region T1 of the groove surface 42, the distance L2 between the center of the drain outlet 43 and its boundary in the direction of the second angle α2 is greater than the distance L1 between the center of the drain outlet 43 and its boundary in the direction of the first angle α1. As a result, the amount of water that flows directly into the drain outlet 43 increases. In other words, the amount of water that splashes before entering the drain outlet 43 is suppressed. Also, the energy of collisions between water particles before entering the drain outlet 43 is reduced, suppressing water splashing. As a result, the splashing of dirt is suppressed, and dirt can be smoothly drained into the drain outlet 43.

[0058] Furthermore, in the washbasin 12, the boundary between the groove surface 42 and the bottom surface 41 in the protruding region T1 is wider in the second direction W2, which corresponds to the second position that is closer to the center of the drain opening 43 than the first position in the first direction, than in the second direction W1, which corresponds to the first position in the first direction.

[0059] With this configuration, the amount of water that flows directly into the drain 43 increases, the scattering of dirt is suppressed, and the dirt can be smoothly washed away into the drain 43.

[0060] Furthermore, in the washbasin 12, the boundary of the protruding region T1 has a linear shape S1 on both sides of the position of the center of the drain 43 in the second direction, and the width between the linear shapes S1 is wider the closer the position is to the center of the drain 43 in the first direction.

[0061] With this configuration, the linear shape S1 effectively increases the amount of water that flows directly into the drain 43, suppressing the scattering of dirt and allowing the dirt to flow smoothly into the drain 43.

[0062] Furthermore, in the washbasin 12, at the boundary of the protruding region T1, the space between the straight lines S1 is a curved shape S2 that extends from each of the straight lines S1 and gradually decreases in angle with respect to the second direction.

[0063] This configuration allows both linear shapes S1 to be connected, enabling water to be smoothly guided to the drain 43.

[0064] Furthermore, in the washbasin 12, the groove surface 42 has a boundary shape with the bottom surface 41 that is parallel to the second direction on the side surface 32 side in the second direction, relative to the protruding region T1.

[0065] This configuration allows water to flow smoothly towards the drain 43, and in combination with the V-shape, it effectively guides water to the drain 43.

[0066] ---Second Embodiment--- Next, a second embodiment will be described.

[0067] In the second embodiment, the shape of the side portion 32 differs from that of the first embodiment. Note that the same aspects as in the first embodiment will not be described. Furthermore, the second embodiment can be combined with the first embodiment.

[0068] In the second embodiment, the rear side surface 32a that contacts the groove surface 42 at the back has a protrusion 51. Figure 13 is a plan view showing an example of the configuration of the washbasin 12 according to this embodiment. In Figure 13, multiple points are marked on the bottom surface 41 and parallel diagonal lines are marked on the groove surface 42. Figure 14 is a perspective view showing an example of the configuration of the washbasin 12 according to this embodiment.

[0069] The rear side portion 32a has a protrusion 51 that projects in the front-rear direction between it and the drain opening 43. In a plan view as shown in Figure 13, the protrusion 51 protrudes from the rear side portion 32a toward the center of the drain opening 43. As shown in Figure 13, the protrusion 51 has a curved shape. Specifically, in a plan view, the protrusion 51 has the greatest width (width in the front-rear direction) at the position of the drain opening 43 in the left-right direction, and the width decreases toward the left-right direction. That is, the length of the protrusion increases as it approaches the center in the left-right direction. In a plan view, it is preferable that the radius of curvature of the protrusion 51 is greater than the radius of curvature of the curved shape S2 of the groove surface 42. It is also preferable that the width of the protrusion 51 in the left-right direction is wider than the size of the drain opening 43. In particular, it is preferable that the width of the protrusion 51 in the left-right direction is wider than the width of the protruding region T1 (V-shape) of the groove surface 42 in the left-right direction.

[0070] Furthermore, as shown in Figure 14, the protrusion of the convex portion 51 gradually decreases in the upward direction (height direction). For example, the height of the convex portion 51 is set lower than that of the edge portion 21. The lower end of the convex portion 51 is in contact with the surface of the groove 42. That is, the convex portion 51 is in contact with both the rear side portion 32a and the groove surface 42, and has a shape that protrudes toward the front.

[0071] As shown in Figure 13, by providing the protrusion 51, splashing of water in region B2 between the drain 43 and the rear side is effectively suppressed. Specifically, in region B2, the flow directions of water flowing from the right and water flowing from the left are no longer in opposite directions (parallel and opposite directions), so the collision energy is reduced and splashing of water is suppressed. As a result, splashing of dirt is suppressed, and dirt can be smoothly carried to the drain 43.

[0072] <Effects and Effects> In this embodiment, the washbasin 12 has a groove surface 42 that is in contact with the side surface 32 in a first direction, and the side surface 32 has a protrusion 51 that projects in the first direction between itself and the drain opening 43.

[0073] With this configuration, the energy of water collisions can be suppressed in the groove surface 42 between the drain 43 and the side surface 32, thereby suppressing water splashing. As a result, the splashing of dirt is suppressed, and dirt can be smoothly drained into the drain 43.

[0074] Furthermore, in the washbasin 12, the protrusion 51 has a shape in which, in a plan view, the width in the first direction is greatest at the position of the drain 43 in the second direction, and the width in the first direction decreases toward the second direction.

[0075] This configuration effectively suppresses water splashing, which in turn suppresses the splashing of dirt.

[0076] <Variation> This disclosure is not limited to the embodiments described above. In other words, any design modifications made to the above-described examples by those skilled in the art are also included within the scope of this disclosure, as long as they retain the features of this disclosure. Furthermore, the elements of the above embodiments and the following modifications can be combined to the extent that it is technically possible, and any combination thereof is also included within the scope of this disclosure, as long as it retains the features of this disclosure.

[0077] For example, in the first and second embodiments, the case in which the first direction is the front-to-back direction and the second direction is the left-to-right direction was described, but the first and second directions are not limited to the left-to-right direction and the front-to-back direction, respectively. For example, the first direction may be the left-to-right direction and the second direction may be the front-to-back direction.

[0078] Furthermore, while the first and second embodiments described the case where the region T1 of the groove surface 42 is V-shaped as an example, the shape of region T1 is not limited to V-shape. For example, it may be a curved shape where the width in the left-right direction widens towards the center of the drain opening 43 in the front-to-back direction.

[0079] Furthermore, while the first and second embodiments described the case where the linear shape S3 extends parallel to the left-right direction, the shape and direction of the boundary of the portion of the linear shape S3 are not limited to those described above. For example, the linear shape S3 may extend in a direction having an angle of 0 degrees or more with respect to the left-right direction, or the linear shape S3 may be a curved shape instead of a straight line.

[0080] Furthermore, in the second embodiment, the groove surface 42 contacts the rear side surface 32a at the rear side, so the rear side surface 32a is provided with a protrusion 51. However, the position of the groove surface 42 does not limit the case in which the protrusion 51 is provided on the rear side surface 32a. For example, if the groove surface 42 is provided on the front side, the protrusion 51 may be provided on the front side surface 32b. [Explanation of Symbols]

[0081] 12:Wash basin 31: Bottom 32: Side part 41: Bottom 42:Groove surface 43:Drain port L1: distance L2: distance T1: Region (protruding region) α1: First angle α2 :Second angle

Claims

1. A washbasin comprising a bottom and side portions surrounding the bottom, The bottom is, The drain and A bottom surface extending in a first direction toward the drain opening from the aforementioned side portion, A groove surface that is connected to the bottom surface in the first direction and lower than the bottom surface, extends in a second direction perpendicular to the first direction with respect to the drain opening, and inclined downward toward the drain opening, Equipped with, The groove surface has a region that protrudes toward the bottom surface with respect to the first direction passing through the center of the drain opening, The boundary between the groove surface and the bottom surface in the protruding region has a linear shape on both sides of the position of the center of the drain opening in the second direction, and the width between the linear shapes is wider the closer the position is to the center of the drain opening in the first direction. Washbasin.

2. The linear shape has an angle greater than 0 degrees with respect to the first direction. The washbasin according to claim 1.

3. The boundary between the groove surface and the bottom surface in the protruding region is wider in the second direction than in the first direction than in the second direction which corresponds to the first position, and which corresponds to the second position which is closer to the center of the drain opening than in the first position in the first direction. The washbasin according to claim 1.

4. In the boundary of the protruding region, the space between the straight lines is a curved shape that extends from each of the straight lines and gradually decreases in angle with respect to the second direction. The washbasin according to claim 1.

5. The groove surface, on the side surface in the second direction relative to the protruding region, has a boundary shape with the bottom surface that is parallel to the second direction. A washbasin according to claim 1 or 3.

6. The groove surface is in contact with the side surface in the first direction, The aforementioned side portion has a protrusion that projects in the first direction between itself and the drain opening. A washbasin according to claim 1 or 3.

7. In a plan view, the protrusion has a shape in which the width in the first direction is greatest at the position of the drain in the second direction, and the width in the first direction decreases toward the second direction. The washbasin according to claim 6.

8. A washbasin according to claim 1 or 3, A faucet that discharges water onto the bottom surface of the washbasin, A washbasin equipped with a sink.

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