Urinal

Abstract

To provide a urinal capable of ensuring storage space for a functional part in a storage part without compromising design.SOLUTION: A urinal comprises a bowl part, a storage part, and an extension part. The bowl part receives urine on a bowl surface. The storage part is formed on the upper rear side of the bowl part and stores a functional part. The extension part is formed to extend upward from the upper end of the bowl surface, and forms at least a part of the front wall part of the storage part. The extension part is formed to incline backwards as it extends upward from the lower end.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The disclosed embodiments relate to urinals.

Background Art

[0002] Conventionally, in a urinal, there is known one having a storage portion provided on the upper rear side of a bowl portion for receiving urine of a user, and configured to store a functional portion in the storage portion (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above-described functional portion has a function of supplying water to a water discharge portion of the urinal, etc., and its size varies according to the function. Therefore, in a urinal, it has been required to secure a storage space in the storage portion without impairing the design property.

[0005] One aspect of the embodiment aims to provide a urinal capable of securing a storage space for a functional portion in a storage portion without impairing the design property.

Means for Solving the Problems

[0006] A urinal according to one aspect of the embodiment includes a bowl portion that receives urine on a bowl surface, a storage portion formed on the upper rear side of the bowl portion and configured to store a functional portion, and an extension portion formed so as to extend upward from an upper end portion of the bowl surface and forming at least a part of a front wall portion of the storage portion, wherein the extension portion is formed to incline rearward upward from a lower end portion.

[0007] Thus, since the extension part is formed to extend upward from the upper end part of the bowl surface and is configured to form a part of the front wall part of the storage part, the storage space of the storage part can be widened by the amount of the extension part. As a result, in the storage part, a sufficient storage space for the functional part can be secured. In other words, it becomes possible to secure a storage space corresponding to the size of the functional part.

[0008] Further, since the extension part is formed to incline rearward upward from the lower end part, it is possible to suppress the design of the urinal including the bowl surface from being impaired. In addition, since the extension part inclines rearward, for example, it becomes easier for the user to urinate while checking the direction of the excreted urine, that is, the visibility during urination can be improved.

[0009] Further, the left and right end parts of the extension part and the left and right end parts of the bowl surface are formed such that the radius of curvature continuously changes from the end part of the bowl surface to the end part of the extension part in a side view.

[0010] Thereby, while securing the storage space of the storage part by the extension part, the design of the side line of the urinal can be improved.

[0011] Further, the bowl surface is formed in a concave curved surface shape that is recessed rearward, and is formed such that the radius of curvature continuously changes upward from the lower end part. The extension part is formed in a concave curved surface shape that is recessed rearward, and is formed such that the radius of curvature of the lower end part is continuous with the radius of curvature of the upper end part of the bowl surface.

[0012] In this way, by forming the radius of curvature of the lower end part of the extension part to be continuous with the radius of curvature of the upper end part of the bowl surface, in the line of sight from the user, it appears that the upper end part of the bowl surface to the lower end part of the extension part is smoothly continuous, and the design can be improved. In addition, since the upper end part of the bowl surface to the lower end part of the extension part is smoothly continuous, the cleanability near the boundary between the upper end part of the bowl surface and the lower end part of the extension part can be improved.

[0013] Further, a boundary line between an upper end portion of the bowl surface and a lower end portion of the extension portion is linear in a front view.

[0014] In this way, since the boundary line between the upper end portion of the bowl surface and the lower end portion of the extension portion is linear in the front view, the design property in the front view near the boundary line can be improved. Further, since the boundary line is linear in the front view, the cleanability near the boundary line can be improved.

[0015] Among end portions on the left and right sides of the bowl surface, end portions on the left and right sides of the extension portion, an upper end portion of the extension portion, and a lower end portion of the extension portion, at least two or more end portions are formed to have the same R shape.

[0016] In this way, by forming the end portions that form the appearance of the urinal to have the same R shape, the design property of the urinal can be further improved.

Effect of the Invention

[0017] According to one aspect of the embodiment, a storage space for the functional portion can be secured in the storage portion without spoiling the design property.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

BEST MODE FOR CARRYING OUT THE INVENTION

[0019] Hereinafter, embodiments of the urinal disclosed in the present application will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments shown below.

[0020] (Embodiment) The urinal 1 according to the embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the urinal 1 according to the embodiment. FIG. 2 is a front view of the urinal 1 according to the embodiment, FIG. 3 is a side view of the urinal 1 according to the embodiment, and FIG. 4 is a top view of the urinal 1 according to the embodiment. Further, FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4. Note that FIGS. 1 to 5 and FIGS. 6 and subsequent figures are all schematic diagrams.

[0021] In FIGS. 1 and the like, for convenience of explanation, a three-dimensional orthogonal coordinate system is illustrated in which the X-axis direction, the Y-axis direction, and the Z-axis direction orthogonal to each other are defined, and the positive Z-axis direction is the vertically upward direction. In the following description, the positive X-axis direction may be described as "rightward", the negative X-axis direction as "leftward", the positive Y-axis direction as "forward", and the negative Y-axis direction as "rearward". For this reason, in the following description, the X-axis direction may be referred to as the left-right direction, the Y-axis direction as the front-rear direction, and the Z-axis direction as the up-down direction (vertical direction).

[0022] As shown in FIGS. 1 to 5, the urinal 1 according to the embodiment is installed in a toilet room. The urinal 1 may be a wall-mounted type installed on a wall surface or a floor-mounted type installed on a floor surface. The urinal 1 has a urinal body 2, and the urinal body 2 is made of, for example, pottery.

[0023] The urinal body 2 includes a bowl portion 3, a drainage portion 5, a storage portion 6, a functional portion 10, and a water discharge portion 11.

[0024] The bowl part 3 is formed on the surface (front surface) facing the user, which is the front surface of the urinal body 2. A bowl surface 4 for receiving the urine of the user is formed on the bowl part 3. Cleaning water is discharged from the water spraying part 11 to the bowl surface 4, and the bowl surface 4 is cleaned. The detailed shape of the bowl surface 4 of the bowl part 3 will be described later.

[0025] As shown in FIG. 5, the drainage part 5 includes a drainage port 5a and a drainage trap part 5b. The drainage port 5a is formed at the lower part of the bowl surface 4 of the bowl part 3, and the cleaning water that has cleaned the bowl surface 4 is drained. The drainage trap part 5b is connected to the downstream side of the drainage port 5a. The drainage trap part 5b stores the cleaning water to form a water seal, preventing odors and the like from the drain pipe from flowing back to the bowl part 3 side. A drainage socket 100 is connected to the downstream side of the drainage trap part 5b, and the cleaning water is drained from the drainage trap part 5b to an external drainage pipe (not shown) via the drainage socket 100.

[0026] The storage part 6 is formed at the upper rear side of the bowl part 3 and stores the functional part 10 (see FIGS. 2, 4, and 5). In FIGS. 5 and the like, for the sake of simplicity of illustration, the functional part 10 is shown as a block.

[0027] The storage part 6 has a bottom part 6a, a front wall part 6b, and left and right side wall parts 6c. And the space surrounded by the bottom part 6a, the front wall part 6b, and the left and right side wall parts 6c becomes a storage space S for storing the functional part 10. An upper lid 6d is detachably attached to the storage part 6 from above. Therefore, the upper part of the storage space S is closed by the upper lid 6d.

[0028] Specifically, the bottom part 6a is located below the functional part 10. The bottom part 6a supports the functional part 10 from below. Note that the bottom part 6a may directly support the functional part 10, or may indirectly support the functional part 10 via a support member. Also, in some cases, part or all of the functional part 10 may be fixed and supported at a part other than the bottom part 6a.

[0029] The front wall portion 6b is a wall formed to rise upward from the front end portion (front edge) of the bottom portion 6a. The left and right side wall portions 6c are walls formed to rise upward from the side end portions (side edges) in the left and right directions of the bottom portion 6a. The bottom portion 6a, the front wall portion 6b, and the left and right side wall portions 6c are integrally formed, and a storage space S that is open at the rear is formed by being surrounded by these bottom portion 6a, front wall portion 6b, and left and right side wall portions 6c.

[0030] In this way, the storage portion 6 is not arranged further above the bowl portion 3, but is arranged at the upper rear side of the bowl portion 3 so that the functional portion 10 is hidden inside the bowl portion 3. For this reason, the urinal 1 has a compact appearance.

[0031] The functional portion 10 has functions such as supplying cleaning water to the water discharge portion 11. As the functional portion 10, for example, an automatic cleaning unit that automatically cleans the bowl surface 4 can be used.

[0032] As an example, the functional portion 10 includes a water supply path, a stop valve, a valve unit (none of which are shown), etc. The water supply path is a flow path through which cleaning water is supplied from a water supply source (not shown) such as a water supply. The stop valve is connected to the water supply path and supplies and stops the cleaning water to the valve unit and the like. The valve unit is connected to the downstream side of the stop valve in the water supply path and has an electromagnetic valve that can be electrically opened and closed, a constant flow valve that restricts the inflowing cleaning water to a predetermined flow rate range, etc. The valve unit opens the electromagnetic valve based on a detection signal indicating the presence or absence of a user by a human body detection sensor (not shown) and allows the cleaning water in the water supply path to flow. The water discharge portion 11 is connected to the downstream side of the functional portion 10 (valve unit) via a connection portion 12 (see FIG. 5), and the cleaning water flowing through the water supply path is supplied to the water discharge portion 11 via the connection portion 12 and discharged onto the bowl surface 4.

[0033] The functional unit 10 includes devices such as the above-described valve unit. Depending on the specifications of the urinal 1, etc., other devices may be included. For example, a generator that generates electricity using the flow of cleaning water in the water supply line may be included in the functional unit 10. Also, depending on the country or location where the urinal 1 is installed, a vacuum breaker that prevents sewage from flowing back into the water supply line may be included in the functional unit 10 in order to meet the regulations defined in such country, etc.

[0034] As described above, the size of the functional unit 10 varies depending on the functions it has. Therefore, in the storage unit 6 that houses the functional unit 10, it is preferable to sufficiently secure the storage space S. However, since it is necessary to consider the design of the urinal 1, in the urinal 1, it has been required to secure the storage space S in the storage unit 6 without sacrificing the design.

[0035] Therefore, the urinal 1 according to the present embodiment is configured to be able to secure the storage space S in the storage unit 6 without sacrificing the design.

[0036] Specifically, the urinal 1 includes an extension part 8. The extension part 8 is formed to extend upward from the upper end part 4b of the bowl surface 4. Before continuing the description of the extension part 8, the bowl surface 4 will be described in detail.

[0037] The bowl surface 4 is formed to be a concave surface that is more inward (toward the center in the left - right direction of the bowl part 3) and deeper (rear side) as it goes downward from the upper end part 4b. Also, the bowl surface 4 is formed to be a surface that gently curves toward the rear side from near the central part in the vertical direction to the lower part. Further, the above - described drainage part 5 is provided at the lower part of the bowl surface 4. The above - described water - discharging part 11 is provided at the upper part of the bowl surface 4.

[0038] Here, the bowl surface 4 will be described with reference to FIGS. 6 and 7 as well. FIG. 6 is an end view taken along line VI-VI of FIG. 2, and FIG. 7 is an end view taken along line VII-VII of FIG. 2. In FIGS. 6 and 7, for the sake of convenience of understanding, the space (such as the storage space S, etc.) existing behind the bowl surface 4 is also hatched. Note that FIG. 7 is also an end view of the boundary portion between the bowl surface 4 and the extension portion 8.

[0039] As shown in FIGS. 2, 6, 7, etc., the bowl surface 4 has a front portion 4e facing the user. The front portion 4e is formed in a concave curved surface shape (arc shape) that is recessed rearward. Also, the front portion 4e is continuously formed in a concave curved surface shape in the left-right direction. Such a front portion 4e is formed such that the concave curved surface shapes are different on the upper side and the lower side.

[0040] Specifically, the lower side of the front portion 4e is a composite shape portion formed by a combination of arcs having a plurality of curvature radii R, or a combination of an arc having a plurality of curvature radii R and a straight line, as shown in FIG. 6 etc., and forms a composite R region 4f.

[0041] In the bowl surface 4 (front portion 4e) in the composite R region 4f, as it goes from the upper part toward the lower end portion 4a (see FIG. 5) of the bowl surface 4, the curvature radius R of the arc is formed so as to continuously (gradually) change so as to be more concave toward the back side (rear side). Also, the end portions 4c on the left and right sides of the bowl surface 4 in the composite R region 4f are formed so as to protrude forward, thereby forming side wall portions on the left and right sides.

[0042] The upper side of the front portion 4e is a shape portion formed by an arc having one curvature radius R, as shown in FIG. 7 etc., and forms a single R region 4g. In other words, the bowl surface 4 (front portion 4e) in the single R region 4g is formed by a single arc shape in which the curved surface has substantially one curvature radius R. Note that the above-mentioned "arc having one curvature radius R" does not necessarily have to be exactly one curvature radius R, and it may be an arc in which the curvature radius R does not substantially change in the left-right direction.

[0043] In addition, in the bowl surface 4 (front portion 4e) of the single R region 4g, side wall portions that protrude forward from the left and right end portions 4c of the bowl surface 4 are not formed. In other words, the upper portion of the bowl surface 4 is formed only by the front portion 4e, and no side wall portion is formed.

[0044] In the bowl surface 4 (front portion 4e) of the single R region 4g, as it goes downward from the upper end portion 4b of the bowl surface 4, the arc radius of curvature R gradually decreases (the curvature gradually increases) so that it becomes more concave toward the back side (rear side).

[0045] In addition, in the bowl surface 4, at the boundary portion between the single R region 4g and the composite R region 4f, the arc radius of curvature R is formed so as to gradually change. In other words, it is formed so that the radius of curvature R changes continuously.

[0046] Thus, the bowl surface 4 according to the present embodiment is formed in a concave curved surface shape that is concave toward the rear, and is formed so that the radius of curvature continuously changes upward from the lower end portion 4a.

[0047] In addition, since no side wall portion is formed on the upper portion side of the bowl surface 4 according to the present embodiment, the design property of the urinal 1 can be improved.

[0048] As shown in FIGS. 1 to 5, the extension portion 8 is formed to extend upward from the upper end portion 4b of the bowl surface 4 formed as described above. Here, the extension portion 8 will be described with reference to FIG. 8 as well. FIG. 8 is an enlarged cross-sectional view showing an enlarged portion surrounded by the dashed-dotted line in FIG. 5.

[0049] As shown in FIGS. 5 and 8, etc., the extension portion 8 is formed so as to be located on the front side of the storage portion 6. In other words, the extension portion 8 forms a part of the front wall portion 6b of the storage portion 6. In the present embodiment, the extension portion 8 forms a part of the front wall portion 6b of the storage portion 6, but is not limited thereto, and may form the entire front wall portion 6b. That is, the extension portion 8 only needs to form at least a part of the front wall portion 6b of the storage portion 6. Further, since the extension portion 8 is formed at a position that covers the bowl surface 4 from above, it can be said that the extension portion 8 is an eaves portion.

[0050] As shown by arrow A in FIG. 8, the extension portion 8 is formed to incline rearward upward from the lower end portion 8a. In other words, in a side view, the upper end portion 8b is located on the rear side and the lower end portion 8a is located on the front side, and it is formed to have an upward inclination from the lower end portion 8a toward the upper end portion 8b.

[0051] Thus, since the extension portion 8 according to the present embodiment is formed to extend upward from the upper end portion 4b of the bowl surface 4 and is configured to form a part of the front wall portion 6b of the storage portion 6, the storage space S of the storage portion 6 can be widened by the amount of the extension portion 8. As a result, in the storage portion 6 according to the present embodiment, the storage space S for the functional portion 10 can be sufficiently secured. In other words, it becomes possible to secure the storage space S according to the size of the functional portion 10.

[0052] Further, since the extension portion 8 is formed to incline rearward upward from the lower end portion 8a, it is possible to suppress the breakdown of the design property of the urinal 1 including the bowl surface 4. Further, since the extension portion 8 inclines rearward, for example, it becomes easier for the user to urinate while checking the direction of the excreted urine, that is, the visibility during urination can be improved.

[0053] As shown in FIG. 3, the extension portion 8 is formed so as to be smoothly continuous with the left and right end portions 4c of the bowl surface 4 in a side view. Specifically, the left and right end portions 8c of the extension portion 8 and the left and right end portions 4c of the bowl surface 4 are formed such that the radius of curvature R continuously changes from the end portion 4c of the bowl surface 4 toward the end portion 8c of the extension portion 8 in a side view.

[0054] For example, the left and right end portions 4c of the bowl surface 4 and the left and right end portions 8c of the extension portion 8 are formed in a concave curved surface shape (arc shape) that is concave rearward in a side view. The left and right end portions 4c of the bowl surface 4 are formed such that the radius of curvature R of the arc gradually increases as it goes upward in a side view. The left and right end portions 8c of the extension portion 8 are formed so as to extend upward from the end portion 4c of the bowl surface 4, and are formed such that the radius of curvature R continuously changes (for example, gradually increases) from the end portion 4c of the bowl surface 4 in a side view (see arrow B in FIG. 3).

[0055] Thereby, in the present embodiment, while securing the storage space S of the storage portion 6 by the extension portion 8, the design property of the side line of the urinal 1 can be improved.

[0056] As shown in FIG. 7 which is an end view of the boundary portion between the bowl surface 4 and the extension portion 8, the extension portion 8 has a front portion 8e facing the user. The front portion 8e is formed in a concave curved surface shape (arc shape) that is concave rearward. Further, the front portion 8e is continuously formed in a concave curved surface shape in the left - right direction.

[0057] And the extension portion 8 is formed such that the radius of curvature R of the lower end portion 8a (see FIG. 5) is continuous with the radius of curvature R of the upper end portion 4b (see FIG. 5) of the bowl surface 4. Also, in the extension portion 8, the radius of curvature R between the lower end portion 8a and the upper end portion 8b (see FIG. 5) is substantially the same radius of curvature R, but is not limited thereto, and the radius of curvature R may be changed as concentric circles, etc.

[0058] In this way, by forming the radius of curvature R of the lower end portion 8a of the extension portion 8 to be continuous with the radius of curvature R of the upper end portion 4b of the bowl surface 4, from the user's line of sight, it appears that from the upper end portion 4b of the bowl surface 4 to the lower end portion 8a of the extension portion 8 is smoothly continuous, and the design property can be improved. Further, since from the upper end portion 4b of the bowl surface 4 to the lower end portion 8a of the extension portion 8 is smoothly continuous, the cleanability near the boundary between the upper end portion 4b of the bowl surface 4 and the lower end portion 8a of the extension portion 8 can be improved.

[0059] As shown in FIG. 2 and the like, the boundary line 9 between the upper end portion 4b of the bowl surface 4 and the lower end portion 8a of the extension portion 8 is linear in a front view. In other words, the boundary line 9 between the upper end portion 4b of the bowl surface 4 and the lower end portion 8a of the extension portion 8 is linear and extends in the left - right direction. Further, such a linear boundary line 9 extends so as to be continuous to the left and right end portions 4c of the bowl surface 4 (or the left and right end portions 8c of the extension portion 8).

[0060] In this way, since the boundary line 9 between the upper end portion 4b of the bowl surface 4 and the lower end portion 8a of the extension portion 8 is linear in a front view, the design property in the front view near the boundary line 9 can be improved. Further, since the boundary line 9 is linear in a front view, the cleanability near the boundary line 9 can be improved.

[0061] Further, in the urinal 1 according to the present embodiment, the end portions forming the appearance are formed to have the same R - shape.

[0062] For example, the left and right end portions 4c of the bowl surface 4, the left and right end portions 8c of the extension portion 8, the upper end portion 8b of the extension portion 8, and the lower end portion 8a of the extension portion 8 are formed to have the same R - shape. In other words, the shapes at the folded - back portions of each end portion such as the left and right end portions 4c of the bowl surface 4 are formed to have the same R - shape. Note that the same R - shape is, for example, formed by including an arc with the same radius of curvature R, but is not limited thereto.

[0063] Also, in the storage portion 6, the left and right end portions 6e of the upper lid 6d are formed to have the same R shape as the respective end portions such as the left and right end portions 4c of the above-described bowl surface 4 (see FIGS. 2 and 4). Specifically, the left and right end portions 6e of the upper lid 6d in a top view are formed to have the same R shape as the respective end portions such as the left and right end portions 4c of the bowl surface 4.

[0064] In this way, by forming the end portions that form the appearance of the urinal 1 to have the same R shape, the design property of the urinal 1 can be further improved.

[0065] In the above description, all the end portions of the left and right end portions 8c of the extension portion 8, the upper end portion 8b of the extension portion 8, the lower end portion 8a of the extension portion 8, and the left and right end portions 6e of the upper lid 6d are formed to have the same R shape, but it is not limited thereto. That is, at least two or more of the above-described end portions may be formed to have the same R shape. More specifically, when the radius of curvature of the R shape of the end portion is set to about 6 mm, the manufacturability of the pottery and the sharpness in terms of the appearance design are remarkably exhibited.

[0066] As described above, the urinal 1 according to the embodiment includes a bowl portion 3, a storage portion 6, and an extension portion 8. The bowl portion 3 receives urine on the bowl surface 4. The storage portion 6 is formed at the upper rear side of the bowl portion 3 and stores the functional portion 10. The extension portion 8 is formed to extend upward from the upper end portion 4b of the bowl surface 4 and forms at least a part of the front wall portion 6b of the storage portion 6. Further, the extension portion 8 is formed to incline rearward upward from the lower end portion 8a. Thereby, a storage space for the functional portion can be secured in the storage portion without spoiling the design property of the urinal 1.

[0067] <Supplementary Note> (1) A bowl portion that receives urine on the bowl surface, A storage portion that is formed at the upper rear side of the bowl portion and stores the functional portion, An extension part is formed so as to extend upward from the upper end part of the bowl surface and forms at least a part of the front wall part of the storage part. and includes The extension part is formed so as to incline rearward from the lower end part upward. A urinal characterized by the above. (2) The left and right end parts of the extension part and the left and right end parts of the bowl surface are formed such that the radius of curvature continuously changes from the end part of the bowl surface to the end part of the extension part in a side view. The urinal according to (1), characterized by the above. (3) The bowl surface is formed in a concave curved surface shape that is recessed rearward, and is formed such that the radius of curvature continuously changes from the lower end part upward. The extension part is formed in a concave curved surface shape that is recessed rearward, and is formed such that the radius of curvature of the lower end part is continuous with the radius of curvature of the upper end part of the bowl surface. The urinal according to (1) or (2), characterized by the above. (4) The boundary line between the upper end part of the bowl surface and the lower end part of the extension part is linear in a front view. The urinal according to any one of (1) to (3), characterized by the above. (5) Among the left and right end parts of the bowl surface, the left and right end parts of the extension part, the upper end part of the extension part, and the end parts of the lower end part of the extension part, at least two or more end parts are formed to have the same R shape. The urinal according to any one of (1) to (4), characterized by the above.

[0068] Further effects and modifications can be easily derived by those skilled in the art. For this reason, the broader aspects of the present invention are not limited to the specific details and representative embodiments represented and described as above. Therefore, various changes can be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.

Explanation of reference numerals

[0069] 1 Urinal 3 Bowl part 4 Bowl surface 6 Storage part 8 Extension part 10 Functional part

Claims

1. A bowl part for receiving urine on a bowl surface, A storage part formed at the upper rear side of the bowl part for storing functional parts, An extension part formed to extend upward from the upper end part of the bowl surface and forming at least a part of the front wall part of the storage part and comprising, The extension part includes a front part formed to incline backward upward from the lower end part, and an upper surface part formed to be continuous with the upper end part of the front part and extend backward, The lower end part of the front part is the upper end part of the bowl surface, The front part inclines backward upward from the lower end part to the upper end part A urinal characterized by this.

2. The left and right end parts of the extension part and the left and right end parts of the bowl surface are formed such that the radius of curvature continuously changes from the end part of the bowl surface to the end part of the extension part in a side view The urinal according to Claim 1, characterized by this.

3. The bowl surface is formed in a concave curved surface shape that is concave backward, and is formed such that the radius of curvature continuously changes upward from the lower end part, The extension part is formed in a concave curved surface shape that is concave backward, and is formed such that the radius of curvature of the lower end part is continuous with the radius of curvature of the upper end part of the bowl surface The urinal according to Claim 1, characterized by this.

4. The boundary line between the upper end part of the bowl surface and the lower end part of the extension part is linear in a front view The urinal according to Claim 1, characterized by this.

5. Among the left and right end parts of the bowl surface, the left and right end parts of the extension part, the upper end part of the extension part, and the end parts of the lower end part of the extension part, at least two or more end parts are formed to have the same R shape The urinal according to Claim 1, characterized by this.

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