JP2011120833A - Bathroom implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathroom implement capable of achieving excellent nonslip performance when placed on a floor surface wet with water, immersed under water in a bathtub, or touched by a body wet with water. <P>SOLUTION: The bathroom implement is covered with nonslip structure at least partly on its outside surface. The nonslip structure is formed of silicone rubber having a JIS-A hardness of 40-80. A plurality of linear projections which are V-shaped in a plan view are repeatedly provided on the outside surface of the nonslip structure. Gaps formed between adjacent linear projections are formed to be totally continuous. A pair of side walls at the root of each linear projection are formed with inclination to be flared. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to bathroom tools such as a bathroom mat and a bathroom chair for installation in a bathroom floor or bathtub.

  According to a survey by the National Health Service Institute for the Aged, the most common accidents in nursing homes were falls and falls, accounting for more than 70% of the total. For this reason, preventing falls or falls leads to a significant reduction in the number of accidents at nursing homes. In particular, when bathing caregivers, it is important to know how to reduce accidents in the bathroom because the caregivers are involved in the dangerous work of walking on slippery floors while holding the caregivers. It is a difficult issue. In view of such a situation, various bathroom tools that have been devised to prevent falling have been proposed.

  For example, bathroom floor mats have been proposed that take into account the anti-slip properties of the lower surface that contacts the floor surface and the upper surface that supports the soles of people (see Patent Documents 1 and 2). There has also been proposed a bathtub mat in consideration of the anti-slip property of the lower surface that contacts the inner surface of the bathtub and the upper surface that contacts the body of the bather (see Patent Document 3). In addition, bathroom chairs have been proposed for installation on the floor of bathrooms and the inner bottom of bathtubs, taking into account the anti-slip properties of the bottom of the legs that contact the floor, the seat that supports the human body, and the back of the back. (See Patent Documents 4 to 9).

  These conventional bathroom tools have been devised to improve anti-slip properties, but none of them are necessarily sufficient for use in wet environments. . Moreover, it could not be said that it was necessarily excellent in durability. Furthermore, it has some drawbacks such as high manufacturing costs, complicated maintenance required for hygienic use, and no consideration for allergies to the human body. .

Japanese Utility Model Publication No. 07-039671 Noto 3151650 gazette JP 2007-068873 A Japanese Utility Model Publication No. 58-149955 JP 2001-113620 A Noto 3068236 gazette JP 2007-061509 A JP 2007-267823 A JP 2008-212530 A

  The present invention has been made in order to solve the above-described problems, and may be laid on a floor wet with water, submerged in a bathtub, or brought into contact with a body wet with water. The present invention also provides a bathroom tool that can exhibit excellent anti-slip performance. Another object of the present invention is to provide a bathroom tool that is excellent in durability and can be used for a long period of time. Furthermore, it is an object of the present invention to provide a bathroom tool that can reduce the manufacturing cost, is hygienic and easy to maintain, and is fully considered for human allergies.

  The above object is a bathroom tool in which at least a part of its outer surface is covered with an anti-slip structure, wherein the anti-slip structure is formed of silicone rubber having a JIS-A hardness of 40 to 80 degrees, A plurality of linear protrusions having a V-shape in plan view are repeatedly provided on the outer surface of the substrate, and all the gaps formed between adjacent linear protrusions are continuously formed. The problem is solved by providing a bathroom tool characterized in that the pair of side walls at the base of the convex portion are formed so as to be inclined toward the end.

  Thus, by forming the anti-slip structure with silicone rubber having a JIS-A hardness of 40 to 80 degrees, the anti-slip structure can be made excellent in flexibility and anti-slip performance. It is also possible to make the anti-slip structure not cause an allergic reaction in the human body. Further, by repeatedly providing a plurality of linear convex portions in a V shape in plan view on the outer surface of the anti-slip structure, it is possible to further improve the anti-slip performance. Furthermore, by forming all the gaps formed between adjacent linear protrusions continuously, water does not stay on the anti-slip surface, and molds and other germs are difficult to propagate. Is also possible. Furthermore, by forming a pair of side walls at the base part of the linear convex part so as to be inclined toward the end, the width of the base part of the linear convex part is widened to increase the section modulus, and the linear convex part is damaged. It is also possible to make it difficult to do.

  The arrangement of the plurality of linear convex portions is not particularly limited as long as the linear convex portions are repeatedly provided on the outer surface of the anti-slip structure. For example, a plurality of parallel rows of convex portions are repeatedly provided on the outer surface of the anti-slip structure, and each row of convex portions is arranged in a single row in the same direction in a plurality of linear shapes in a V shape. It is preferable that the direction of the linear convex portion that is configured by the convex portion and belongs to one convex portion row is opposite to the direction of the linear convex portion that belongs to another convex portion row adjacent to the one convex portion row. Thereby, it becomes possible to make a linear convex part into the two directions of a normal direction and a reverse direction, and to make the bathroom tool excellent in the slip resistance in a specific direction. Moreover, since the linear convex portions belonging to the same row are provided in the same direction, the linear convex portions can be densely arranged, so that the slip resistance can be further improved. This configuration is preferably used in bathroom tools that require anti-slip properties in a specific direction (for example, bathroom chairs where the place to sit is determined).

  Further, a plurality of sets of convex portions are repeatedly provided on the outer surface of the anti-slip structure, and each convex portion is arranged in N-fold rotational symmetry (N is an integer of 2 or more) in a plan view V-shape. It is also preferable to configure with N linear protrusions. As a result, the linear convex portion is directed in the N direction, the bathroom utensil is excellent in slip resistance in multiple directions, and the occurrence of a fall accident or the like can be more effectively prevented. This configuration is suitable for use in bathroom tools (for example, bathroom floor panels) in which the direction in which anti-slip properties are required is not particularly determined.

  As described above, according to the present invention, even when laid on a floor wet with water, submerged in a bathtub, or brought into contact with a body wet with water, it exhibits excellent anti-slip performance. It becomes possible to provide bathroom tools that can. It is also possible to provide a bathroom tool that is excellent in durability and can be used for a long period of time. Furthermore, it is possible to reduce the manufacturing cost, and it is possible to provide a bathroom tool that is hygienic and easy to maintain, and that fully considers human allergies.

It is the perspective view which showed the bathroom tool (bathroom floor mat) of the first embodiment. It is the perspective view which showed the bathroom tool (bathtub mat for bathrooms) of the 2nd embodiment. It is the perspective view which showed the bathroom tool (bathroom chair) of the 3rd embodiment. It is the perspective view which showed the bathroom tool (bathroom chair) of the 4th embodiment. It is the top view which showed an example of arrangement | positioning of the several linear convex part in the bathroom tool of this invention. It is the top view which expanded a part of FIG. It is sectional drawing which showed the state which cut | disconnected the one linear convex part in FIG. 6 by XX plane. It is the top view which showed the other example of arrangement | positioning of several linear convex part in the bathroom tool of this invention. It is the top view which expanded a part of FIG.

10 Bathroom floor mats (bathroom tools)
20 Bathroom floor mats (bathroom tools)
30 Bathroom chair (bathroom equipment)
31 Seat plate 32 Leg 40 Bathroom chair (bathroom equipment)
41 Seat plate 42 Leg 43 Backrest α Linear convex part α ₁ Tip part α ₂ Root part β Gap

  The preferred embodiment of the bathroom tool of the present invention will be described more specifically with reference to the drawings. In the following, the bathroom utensils of the four embodiments from the first embodiment to the fourth embodiment will be described, but the bathroom utensils of the present invention are not limited to these four embodiments, but various bathrooms. Can be adopted in tools.

  FIG. 1 is a perspective view showing a bathroom tool 10 (a bathroom floor mat) according to the first embodiment. As shown in FIG. 1, the bathroom floor mat 10 according to the first embodiment is a plate-like body having a square shape in plan view in which convex portions and concave portions are repeatedly provided at a predetermined pitch on the outer peripheral portion thereof. The convex part of one bathroom floor mat 10 is fitted into the concave part of another bathroom floor mat 10 arranged next to the one bathroom floor mat 10, so that the one bathroom floor mat 10 and the other bathroom floor mat 10 are fitted. The floor mat 10 is connected. Thereby, a plurality of bathroom floor mats 10 are spread on the floor of the bathroom.

  In FIG. 1, the hatched portion indicates the portion covered with the anti-slip structure in the bathroom tool 10 (bathroom floor mat) of the first embodiment. As shown in FIG. 1, the bathroom floor mat 10 is covered with an anti-slip structure on substantially the entire upper surface (a surface that contacts a human foot or the like). Further, the lower surface of the bathroom floor mat 10 that cannot be seen in FIG. 1 (the surface in contact with the floor surface of the bathroom) is also covered with an anti-slip structure. This not only prevents the bathroom floor mat 10 from sliding relative to the bathroom floor, but also prevents the feet of a person walking on the upper surface of the bathroom floor mat 10 from slipping. It is possible to make it difficult for a fall accident to occur.

  The anti-slip structure is formed of silicone rubber having a JIS-A hardness of 40 to 80 degrees. The JIS-A hardness of the silicone rubber is preferably 45 to 75 degrees, and more preferably 50 to 70 degrees. The elasticity of the anti-slip structure can be increased by adding a foaming agent or the like to the silicone rubber. It is also preferable to add an antibacterial agent, an antifungal agent, or the like to the silicone rubber. Thereby, it becomes possible to make the floor mat 10 for bathrooms more hygienic. Antibacterial agents and fungicides may be applied to the surface of the anti-slip structure. In the bathroom floor mat 10 of the first embodiment, the anti-slip structure has a sheet shape. The anti-slip structure may constitute the bathroom floor mat 10 alone, or only the upper and lower surfaces of the bathroom floor mat 10 may be constituted of the anti-slip structure.

  In the bathroom tool 10 (bathroom floor mat) according to the first embodiment, as shown in FIGS. 5 to 7, the anti-slip structure has a plurality of linear protrusions α in a V shape in plan view repeatedly on the outer surface thereof. It has been provided. FIG. 5 is a plan view showing an example of the arrangement of the plurality of linear protrusions α in the bathroom tools 10 to 40 of the present invention. FIG. 6 is an enlarged plan view of a part of FIG. FIG. 7 is a cross-sectional view showing a state in which the linear protrusion α in FIG. 6 is cut along the XX plane.

Specifically, as shown in FIG. 5, each linear convex portion α includes a plurality of convex portion rows in which a plurality of linear convex portions α are arranged in parallel with a predetermined width W ₁ in the same direction. Are provided in parallel. The direction of the linear convex portion α belonging to one convex portion row and the direction of the linear convex portion α belonging to another convex portion row adjacent to the one convex portion row are opposite to each other. For this reason, it is particularly difficult to slip in a direction parallel to the convex row (vertical direction toward the plane of FIG. 5). Each linear convex part α is provided with a gap β therebetween, and all the gaps β formed between adjacent linear convex parts α are continuously formed. For this reason, even if the bathroom floor mat 10 gets wet, the water can flow through the gap β. For this reason, it is easy to suppress mold growth and keep the bathroom floor mat 10 hygienic.

A pair of side walls at the root portion alpha ₂ of respective linear protrusions alpha, as shown in FIG. 7, the width of the linear protrusions alpha as becomes closer to the root of such a divergent (linear protrusions alpha Is inclined). Therefore, to increase the strength of the root portion alpha ₂ of the linear protrusions alpha, linear protrusions alpha has become possible to prevent damage. The angle of inclination of the root portion alpha ₂ of the side wall of the line-shaped protruding portions alpha phi (see Figure 7), is not particularly limited, is too small or too large, the root portion of the line-shaped protruding portions alpha alpha _The effect of increasing the strength of ₂ is reduced. Therefore, the inclination angle φ of the root portion alpha ₂ of the side wall of the line-shaped protruding portions alpha, normally a 10 to 80 °. The inclination angle φ of the root portion alpha ₂ of the side wall of the line-shaped protruding portions alpha, preferable to be 20 to 70 °, more preferably a 30 to 60 °.

  By the way, the dimension of the linear protrusion α is not particularly limited. However, if the overall length of the linear protrusion α (the length in the longitudinal direction and the length along the bend) is too short, there is a possibility that excellent anti-slip performance cannot be exhibited. For this reason, the overall length of the linear protrusion α is usually 5 mm or more. The overall length of the linear protrusion α is preferably 10 mm or more, and more preferably 15 mm or more. On the other hand, if the overall length of the linear convex portion α is too long, the linear convex portions α cannot be densely arranged, and there is a possibility that excellent anti-slip performance cannot be exhibited. For this reason, the overall length of the linear protrusion α is normally set to 150 mm or less. The overall length of the linear protrusion α is preferably 100 mm or less, and more preferably 70 mm or less.

Further, the height H ₁ (see FIG. 7) of the linear convex portion α is not particularly limited, but if the linear convex portion α is too low, there is a possibility that excellent antiskid performance cannot be exhibited. Therefore, the height _{H 1} of the line-shaped protruding portion α is usually from 0.5mm or more. The height H ₁ of the linear protrusion α is preferably 1 mm or more, and more preferably 1.5 mm or more. On the other hand, if the height H ₁ of the line-shaped protruding portion α is too high, the strength of the line-shaped protruding portion α may be lowered. Therefore, the height _{H 1} of the line-shaped protruding portion α is usually a 10mm or less. The height H ₁ of the linear protrusion α is preferably 7 mm or less, and more preferably 5 mm or less.

Furthermore, the width W ₁ (see FIG. 7) of the linear protrusion α differs depending on the widths D ₁ and D ₂ (see FIG. 6) of the gap β, and is not particularly limited. However, if the width W ₁ of the linear convex portion α is too narrow, the intensity of the line-shaped protruding portion α may be lowered. Therefore, the width _{W 1} of the line-shaped protruding portion α is usually from 0.5mm or more. Transverse width _{W 1} of the line-shaped protruding portion α is preferable to be 1mm or more, and more preferably 1.5mm or more. On the other hand, an excessively large width W ₁ of the linear protrusions alpha, it may become impossible to exhibit excellent anti-slip performance. For this reason, the width W ₁ of the linear convex portion α is normally set to 15 mm or less. The width _{W 1} of the line-shaped protruding portion α is preferable to be 10mm or less, more preferably 5mm or less.

Furthermore, the ratio (D ₁ / W ₁ , D ₂ / W ₁ ) of the widths D ₁ and D ₂ (see FIG. 6) of the gap β with respect to the width W ₁ (see FIG. 7) of the linear protrusion α. If it is too small, the linear projections α may be arranged too densely and may not be able to exhibit excellent anti-slip performance, and the widths D ₁ and D ₂ of the gap β will be too narrow, and the gap β There is also a risk of accumulation. For this reason, the ratios D ₁ / W ₁ and D ₂ / W ₁ are normally set to 0.2 or more. The ratios D ₁ / W ₁ and D ₂ / W ₁ are preferably 0.5 or more, and more preferably 1 or more. On the other hand, if the ratios D ₁ / W ₁ and D ₂ / W ₁ are too large, the strength of the linear protrusions α may decrease, and the linear protrusions α cannot be densely arranged. There is also a risk that excellent anti-slip performance cannot be exhibited. For this reason, the ratios D ₁ / W ₁ and D ₂ / W ₁ are normally set to 5 or less. The ratios D ₁ / W ₁ and D ₂ / W ₁ are preferably 3 or less, and more preferably 1.5 or less.

  The bending angle θ of the linear protrusion α (see FIG. 6) is not particularly limited as long as it is larger than 0 ° and smaller than 180 °, but if it is too small, the bending portion of the linear protrusion α There is a possibility that it will be difficult to prevent slipping, and water may easily accumulate in the gap β. For this reason, the bending angle θ of the linear protrusion α is usually 30 ° or more. The bending angle θ of the linear protrusion α is preferably 40 ° or more, and more preferably 50 ° or more. On the other hand, if the bending angle θ of the linear protrusion α is too large, the strength of the linear protrusion α may be reduced, and the anti-slip property in the longitudinal direction of the linear protrusion α may be reduced. . For this reason, the bending angle θ of the linear convex portion α is normally set to 150 ° or less. The bending angle θ of the linear protrusion α is preferably 140 ° or less, and more preferably 130 ° or less.

  By the way, in the above example, a plurality of convex portion rows are provided in parallel, but a plurality of linear convex portions can also be arranged as follows. FIG. 8 is a plan view showing another example of the arrangement of the plurality of linear protrusions α in the bathroom tools 10 to 40 of the present invention. FIG. 9 is an enlarged plan view of a part of FIG. The cross-sectional view of the linear convex portion in FIG. 8 is substantially the same as FIG. In this other example, as shown in FIG. 8, a plurality of sets of convex portions are repeatedly provided on the outer surface of the anti-slip structure, and each convex portion group has N-fold rotational symmetry (N is 2 or more). It is composed of N linear convex portions α arranged in an integer). In FIG. 8, the value of N is 6, and each convex part group has a substantially regular hexagonal shape. If the convex portion group is a substantially regular hexagon, as shown in FIG. 8, the convex portion group can be spread in a plane, and a plurality of linear convex portions α can be arranged densely and efficiently. Even if all the convex part groups are triangles or quadrangles (including squares, rectangles, parallelograms, etc.) having the same shape, the convex part groups can be spread.

As shown in FIG. 9, each of the six linear convex portions α constituting one convex portion group has the bending center C ₁ of the linear convex portion α facing the center C ₀ of the convex portion group. Both end portions (outer end portions) of the convex portion α are directed to the outside of the convex portion group. For this reason, the bending angle θ of each linear convex portion α is 60 ° (= 360 ° ÷ 6). By arranging the linear protrusions α in this manner, it is possible to improve the anti-slip property in six directions at 360 ° with one protrusion group. This configuration can be suitably employed in the bathroom floor panel 10 in which the method of applying force is not specified. One each of the line-shaped protruding portions α configuring the protruding portion group, opposite, i.e., bending center C ₁ of the α respective line-shaped protruding portion is disposed to face the outer side of the protruding portion group and 9 However, in this case, there is a disadvantage that a space is generated in the vicinity of the center C ₀ of each convex portion group.

  The number N of the linear convex portions α constituting each convex portion group is not particularly limited as long as it is 2 or more. However, if the number N is too small, the direction in which excellent anti-slip properties can be exhibited may be reduced. For this reason, the value of N is usually 3 or more. The value of N is preferably 4 or more, and more preferably 5 or more. On the other hand, if the value of N is too large, the dimensions of the respective linear protrusions become too small, and the desired slip resistance and durability may not be exhibited. For this reason, the value of N is normally set to 10 or less. The value of N is preferably 8 or less, and more preferably 7 or less.

  Then, the bathroom tool of a 2nd embodiment is demonstrated. FIG. 2 is a perspective view showing the bathroom tool 20 (bathroom bathtub mat) of the second embodiment. The bath tub mat 20 of the second embodiment is a plate having a substantially rectangular shape in plan view, as shown in FIG. The bath tub mat 20 is laid on the inner bottom surface of the bathtub, and supports the body of the bather so that it does not slip in the bathtub. In FIG. 2, a portion indicated by hatching indicates a portion covered with a non-slip structure. As shown in FIG. 2, the bathroom tub mat 20 is substantially entirely covered with a non-slip structure on the upper surface (the surface in contact with a person's sole, buttocks, back, etc.). Moreover, the lower surface (surface which contacts the inner floor surface of a bathtub) of the bathroom bathtub mat 20 which cannot be seen in FIG. 2 is also covered with a non-slip structure. Thereby, the bathtub mat 20 for bathrooms is difficult to slide against the bathtub. In the bathtub tub mat 20 of the second embodiment, the anti-slip structure has a sheet shape. The anti-slip structure may constitute the bath tub mat 20 alone, or only the upper and lower surfaces of the bathroom floor mat 20 may be composed of the anti-slip structure. Since the concrete structure of the anti-slip structure in the bathroom bathtub mat 20 of the second embodiment is substantially the same as that of the bathroom floor mat 20 of the first embodiment, the description thereof is omitted.

  Then, the bathroom tool of a 3rd embodiment is demonstrated. FIG. 3 is a perspective view showing a bathroom tool 30 (a bathroom chair) of the third embodiment. As shown in FIG. 3, the bathroom chair 30 of the third embodiment includes a seat plate 31 for seating and a leg portion 32 for supporting the seat plate 31 at a predetermined height. It has become. In FIG. 3, a portion indicated by hatching indicates a portion covered with the anti-slip structure. As shown in FIG. 3, the bathroom chair 30 has a seat surface 31 a of a seat plate 31 and a lower end portion 32 a of a leg portion 32 covered with a non-slip structure. For this reason, the bathroom chair 30 of the third embodiment can support not only that the leg portion 32 is not slippery with respect to the floor surface but also the slipper of the person seated on the seat plate 32. It has become a thing. In the bathroom chair 30 of the third embodiment, the anti-slip structure of the seat plate 31 is provided by sticking a sheet-like anti-slip structure to the seat surface 31a of the seat plate body formed of plastic or the like. Further, the anti-slip structure of the leg portion 32 is provided by fitting a cap-like anti-slip structure having a linear convex portion α on the outer bottom surface thereof into the lower end portion of the leg portion 32. The specific configuration of the anti-slip structure in the bathroom chair 30 according to the third embodiment is substantially the same as that of the bathroom floor mat 10 according to the first embodiment, and thus the description thereof is omitted.

  Then, the bathroom tool of a 4th embodiment is demonstrated. FIG. 4 is a perspective view showing a bathroom tool 40 (a bathroom chair) of the fourth embodiment. As shown in FIG. 4, the bathroom chair 40 according to the fourth embodiment includes a seat plate 41 for seating, a leg portion 42 for supporting the seat plate 41 at a predetermined height, and a rear seat plate 41. It consists of a backrest 43 provided upward from the side. In FIG. 4, a portion indicated by hatching indicates a portion covered with a non-slip structure. As shown in FIG. 4, in the bathroom chair 40, in addition to the seat surface 41 a of the seat plate 41 and the lower end portion 42 a of the leg portion 42, the front surface 43 a of the backrest 43 is also covered with a non-slip structure. For this reason, the bathroom chair 40 of the fourth embodiment can be supported so as not to slip the back of the person seated on the seat plate 42. In addition, the bathroom chair may be provided with an armrest (not shown) and the outer surface of the armrest may be covered with a non-slip structure. Accordingly, it is possible to support the person sitting on the seat plate 43 so as not to slip. In the bathroom chair 40 according to the fourth embodiment, the anti-slip structure of the seat plate 41 and the backrest 43 includes a seat plate main body formed of plastic or the like, and a seat-like anti-slip structure on the seat surface 41a and the front surface 43a of the backrest main body. It is provided by pasting the body. Further, the anti-slip structure of the leg portion 42 is provided by fitting a cap-like anti-slip structure having a linear convex portion α on the outer bottom surface thereof into the lower end portion of the leg portion 42. The specific configuration of the anti-slip structure in the bathroom chair according to the fourth embodiment is substantially the same as that of the bathroom floor mat 10 according to the first embodiment, and therefore the description thereof is omitted.

  In addition to these, the same configuration can be adopted for other bathroom tools such as a bathroom table and bathroom shoes. The bathroom utensil of the present invention can be suitably used not only in households but also in large baths such as various facilities. Moreover, it can employ | adopt suitably also for the bathroom tool for care used by the care receiver who needs care.

Claims (3)

A bathroom tool having at least a part of its outer surface covered with a non-slip structure,
The anti-slip structure is formed of silicone rubber having a JIS-A hardness of 40 to 80 degrees,
A plurality of linear convex portions having a V shape in plan view are repeatedly provided on the outer surface of the anti-slip structure, and all gaps formed between adjacent linear convex portions are continuously formed,
A bathroom tool characterized in that a pair of side walls at the root of each linear convex portion is formed so as to be inclined toward the end. A bathroom tool having at least a part of its outer surface covered with a non-slip structure,
The anti-slip structure is formed of silicone rubber having a JIS-A hardness of 40 to 80 degrees,
A plurality of parallel protrusions parallel to each other are repeatedly provided on the outer surface of the anti-slip structure, and each of the protrusions is arranged in a line in the same direction in a plurality of linear protrusions in a V shape in plan view. The direction of the linear convex portion belonging to one convex portion row and the direction of the linear convex portion belonging to the other convex portion row adjacent to the one convex portion row are reversed, and adjacent lines The gaps formed between the convex portions are all formed continuously,
A bathroom tool characterized in that a pair of side walls at the root of each linear convex portion is formed so as to be inclined toward the end. A bathroom tool having at least a part of its outer surface covered with a non-slip structure,
The anti-slip structure is formed of silicone rubber having a JIS-A hardness of 40 to 80 degrees,
A plurality of sets of convex portions are repeatedly provided on the outer surface of the anti-slip structure, and each of the convex portions is arranged in N-fold rotational symmetry (N is an integer of 2 or more). The gaps formed between adjacent linear projections are all formed continuously, and
A bathroom tool characterized in that a pair of side walls at the root of each linear convex portion is formed so as to be inclined toward the end.

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