Hair washing machine

Abstract

To smoothly discharge liquid from a hair washing region.SOLUTION: A hair washing device 10 comprises a hair washing tank 11 and a discharge part 81. The hair washing tank has a peripheral wall 12 and a bottom 40. The peripheral wall 12 is expanded by supply of a gas, and is shrunk by discharge of the gas. The bottom 40 closes one end part of the peripheral wall 12 in a height direction. The discharge part 81 discharges liquid from a hair washing region S2 surrounded by the peripheral wall 12 and the bottom 40. The bottom 40 has: a core material 41; and a covering part 51 covering the core material 41. The core material 41 has a first division part 42 and a second division part 43. The covering part 51 has a guiding path S3. The guiding path S3 is defined between the first division part 42 and the second division part 43. The guiding path S3 extends toward the discharge part 81.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a hair washing device. [Background technology]

[0002] The hair washing device disclosed in Patent Document 1 is used when washing the hair of sick people or people requiring care. The hair washing device comprises a peripheral wall, a bottom, and an outlet. The peripheral wall expands when gas is supplied and contracts when gas is discharged. The bottom closes one end of the peripheral wall in the height direction. The area surrounded by the peripheral wall and the bottom is the hair washing area. The hair washing area is the area where the head is placed when washing hair. When washing hair, a liquid such as water is supplied to the hair washing area. The hair is washed using this liquid. The liquid used for washing is discharged from the outlet to outside the hair washing area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-62293 Summary of the Invention [Problem to be solved by the invention]

[0004] The liquid used for washing hair is unsanitary, so it is preferable to smoothly discharge the liquid from the hair washing area. [Means for solving the problem]

[0005] A hair washing machine that solves the above problem is a hair washing machine that has a cylindrical peripheral wall that expands when gas is supplied and contracts when gas is discharged, a bottom that closes one end of the peripheral wall in the vertical direction, and a discharge section that discharges liquid from the hair washing area surrounded by the peripheral wall and the bottom, wherein the bottom section has a core material and a covering section that covers the core material, the core material has a first divided section and a second divided section that is spaced apart from the first divided section, and the covering section has a guide path that is arranged between the first divided section and the second divided section and extends toward the discharge section.

[0006] When the liquid is discharged from the hair washing area, the liquid is guided to the discharge section by the guide path, which allows the liquid to be smoothly discharged from the hair washing area. In the above-mentioned hair washing device, if the end portion closed by the bottom portion is defined as a first end portion, and the end portion in the height direction of the peripheral wall opposite the first end portion is defined as a second end portion, the peripheral wall may have a neck holding portion that is recessed from the second end portion toward the first end portion, and the guide path may be arranged to extend between the neck holding portion and the discharge portion.

[0007] In the above hair washing device, the bottom may include a restricting portion that restricts movement of the core material, and the restricting portion may be provided outside the hair washing area. [Effects of the Invention]

[0008] According to the present invention, liquid can be smoothly discharged from the hair washing area. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 2 is a cross-sectional view of the hair washer in a direction perpendicular to the height direction. [Figure 4] 4 is a cross-sectional view of the hair washer taken along line 4-4 in FIG. 3. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is a cross-sectional view showing the bottom of the hair washer. [Figure 8] FIG. 2 is a plan view showing the hair washing device in a folded state. [Figure 9] FIG. 10 is a diagram illustrating how to use the hair washer. [Figure 10] FIG. 10 is a diagram illustrating how to use the hair washer. [Figure 11] FIG. 10 is a diagram illustrating how to use the hair washer. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the hair washer will be described. As shown in Figures 1 and 2, the hair washer 10 includes a hair washing tub 11, an intake / exhaust unit 71, and an exhaust unit 81. The hair washer 10 is used to wash the hair of a person. The person may be a sick person or a person requiring care. The hair washing tub 11 includes a peripheral wall 12 and a bottom 40.

[0011] The peripheral wall 12 expands when gas is supplied and contracts when gas is discharged. The peripheral wall 12 is formed of a flexible sheet. The peripheral wall 12 is formed by welding the flexible sheet into a bag shape. Examples of the flexible sheet include a resin sheet and a rubber sheet.

[0012] 3 and 4, the peripheral wall 12 includes an inner wall 13, an outer wall 14, and welded portions 31 to 33. The inner wall 13 and the outer wall 14 face each other. The peripheral wall 12 in a state in which gas is supplied to the peripheral wall 12 will be described.

[0013] The peripheral wall 12 is cylindrical. The peripheral wall 12 has a pentagonal shape when viewed in the height direction of the peripheral wall 12. The height direction of the peripheral wall 12 is the axial direction of the peripheral wall 12. The peripheral wall 12 has a first end portion 15 and a second end portion 16. The first end portion 15 and the second end portion 16 are end portions of the peripheral wall 12 that are located opposite each other in the height direction. The peripheral wall 12 has five wall portions 20 to 24. The five wall portions 20 to 24 include one holding wall portion 20 and four side wall portions 21 to 24. The holding wall portion 20 and the four side wall portions 21 to 24 correspond to each side of the pentagon. The four side wall portions 21 to 24 include a first side wall portion 21, a second side wall portion 22, a third side wall portion 23, and a fourth side wall portion 24. In the following description, the direction perpendicular to the height direction of the peripheral wall 12 and the thickness direction of the wall portions 20 to 24 is referred to as the length direction of the wall portions 20 to 24. The thickness direction of the wall portions 20 to 24 can also be said to be the direction in which the inner wall 13 and the outer wall 14 face each other. In the following description, the height direction refers to the height direction of the peripheral wall 12.

[0014] As shown in FIG. 2, the holding wall 20 includes a neck holding portion 25. The neck holding portion 25 is provided at the center of the length of the holding wall 20. The neck holding portion 25 is arc-shaped. The neck holding portion 25 is curved so as to be concave from the second end 16 toward the first end 15. The neck holding portion 25 is the portion on which the subject's neck is placed. The height dimension of the peripheral wall 12 is set so that the peripheral wall 12 is unlikely to enter the field of vision of the subject when the subject's neck is placed on the neck holding portion 25. The height dimension of the peripheral wall 12 is, for example, 170 mm.

[0015] The first side wall portion 21 and the second side wall portion 22 are connected to the retaining wall portion 20. The first side wall portion 21 and the second side wall portion 22 face each other with a gap between them in the longitudinal direction of the retaining wall portion 20. The first side wall portion 21 and the second side wall portion 22 are arranged parallel to each other. The internal space of the first side wall portion 21 and the internal space of the retaining wall portion 20 are connected. The internal space of the second side wall portion 22 and the internal space of the retaining wall portion 20 are connected.

[0016] The third side wall 23 is connected to the first side wall 21. The third side wall 23 is provided such that the distance between the third side wall 23 and the holding wall 20 increases as the distance between the third side wall 23 and the first side wall 21 increases. The internal space of the first side wall 21 is connected to the internal space of the third side wall 23. The fourth side wall 24 is connected to the second side wall 22. The fourth side wall 24 is provided such that the distance between the fourth side wall 24 and the holding wall 20 increases as the distance between the fourth side wall 24 and the second side wall 22 increases. The internal space of the second side wall 22 is connected to the internal space of the fourth side wall 24. The third side wall 23 and the fourth side wall 24 are connected to each other. The side walls 21 to 24 are provided such that, when the subject's neck is placed on the neck holding portion 25, a space of at least a predetermined dimension is defined between the subject's head and each side wall 21 to 24. The predetermined size is a size that allows the person washing the hair to insert their arms or hands to wash the subject's hair. The predetermined size is, for example, 150 mm. The head size of the subject is, for example, the average size for Japanese adults.

[0017] The peripheral wall 12 has five corners 26, 27. The five corners 26, 27 correspond to the corners of a pentagon. The corners 26, 27 are locations where the five wall portions 20 to 24 are connected to one another. Of the five corners 26, 27, the location where the third side wall portion 23 and the fourth side wall portion 24 are connected is referred to as a first corner 26. Of the five corners 26, 27, four corners 27 different from the first corner 26 are referred to as second corners 27. When viewed from the height direction of the peripheral wall 12, the peripheral wall 12 is line-symmetrical with respect to an imaginary perpendicular line L1 extending from the first corner 26 toward the retaining wall portion 20.

[0018] 3 and 4, the welded portions 31 to 33 weld the inner wall 13 to the outer wall 14. The welded portions 31 to 33 include a first welded portion 31, a second welded portion 32, and a third welded portion 33.

[0019] A first welded portion 31 is provided on each wall portion 20-24. The first welded portion 31 extends in the length direction of the wall portions 20-24. The first welded portion 31 is linear. The internal space of the wall portions 20-24 is divided by the first welded portions 31 into a plurality of air chambers S1. The plurality of air chambers S1 overlap each other in the height direction. A plurality of first welded portions 31 are provided on each wall portion 20-24 at intervals in the length direction. The space between adjacent first welded portions 31 in the length direction forms a passage that connects the air chambers S1. This passage allows air to be smoothly supplied to the peripheral wall 12.

[0020] As shown in FIG. 5, the second welded portions 32 are provided at each second corner portion 27. For ease of explanation, FIG. 5 shows the peripheral wall 12 in a state in which the gas has been discharged. The second welded portions 32 are annular. A plurality of second welded portions 32 are provided. The plurality of second welded portions 32 are provided at intervals from each other in the height direction. The second welded portions 32 are provided between the first welded portions 31 provided on the two wall portions 20 to 24 that are connected to each other.

[0021] 6, the third welded portion 33 is provided at the first corner portion 26. The third welded portion 33 extends in the height direction. The third welded portion 33 is linear. As shown in FIG. 7 , the bottom portion 40 includes a core material 41 and a covering portion 51. The core material 41 includes a first divided portion 42 and a second divided portion 43. The first divided portion 42 and the second divided portion 43 have the same shape. Each divided portion 42, 43 is plate-shaped. Each divided portion 42, 43 includes a first portion 44 and a second portion 46. The first portion 44 is a portion that faces the area surrounded by the peripheral wall 12. The second portion 46 is a portion that is located outside the peripheral wall 12 when viewed from the height direction of the hair washing device 10. The first portion 44 includes an edge portion 45. The edge portion 45 is part of the periphery of the first portion 44. The edge portion 45 extends linearly. The second portion 46 protrudes from a different location on the periphery of the first portion 44 than the edge portion 45. The second portion 46 protrudes in a direction perpendicular to the direction in which the edge portion 45 extends and the thickness direction of the first portion 44. The second portion 46 has an inner edge 47 extending between both surfaces of the second portion 46 in the thickness direction.

[0022] The first divided portion 42 and the second divided portion 43 are spaced apart from each other. The edge 45 of the first divided portion 42 and the edge 45 of the second divided portion 43 are parallel to each other. The edge 45 of the first divided portion 42 and the edge 45 of the second divided portion 43 are arranged to face each other. A space is interposed between the edge 45 of the first divided portion 42 and the edge 45 of the second divided portion 43. The first divided portion 42 and the second divided portion 43 are arranged symmetrically with respect to the perpendicular line L1.

[0023] As shown in FIG. 4 , the covering portion 51 covers the core 41. The covering portion 51 includes an inner covering portion 52, an outer covering portion 53, and covering portion welding portions 61, 62, and 63. The inner covering portion 52 and the outer covering portion 53 are flexible sheets. The inner covering portion 52 and the outer covering portion 53 are arranged to sandwich the core 41. The inner covering portion 52 and the outer covering portion 53 have the same shape. Each covering portion 52, 53 includes a first covering portion 54, a second covering portion 55, and a third covering portion 57. The first covering portion 54 is a portion that faces the area surrounded by the peripheral wall 12. The second covering portion 55 and the third covering portion 57 are portions that are located outside the peripheral wall 12 when viewed from the height direction of the hair washing device 10. The second covering portion 55 includes an inner edge 56. The third covering portion 57 includes an inner edge 58.

[0024] The first covered portion 54 of the inner covered portion 52 and the first covered portion 54 of the outer covered portion 53 are provided so as to overlap the first portion 44 of the first divided portion 42 and the first portion 44 of the second divided portion 43 . The second covered portion 55 of the inner covered portion 52, the second portion 46 of the first divided portion 42, and the second covered portion 55 of the outer covered portion 53 are overlapped with each other. The inner edges 56 of the second covered portion 55 of the inner covered portion 52 and the inner edges 56 of the second covered portion 55 of the outer covered portion 53 are located more inward than and along the inner edge 47 of the first divided portion 42. The third covered portion 57 of the inner covered portion 52, the second portion 46 of the second divided portion 43, and the third covered portion 57 of the outer covered portion 53 are overlapped with each other. The inner edges 58 of the third covered portion 57 of the inner covered portion 52 and the inner edges 58 of the third covered portion 57 of the outer covered portion 53 are located more inward than and along the inner edge 47 of the second divided portion 43.

[0025] The covering portion welded portions 61, 62, and 63 weld the inner covering portion 52 and the outer covering portion 53 together. The covering portion welded portions 61, 62, and 63 include a first covering portion welded portion 61, a second covering portion welded portion 62, and a third covering portion welded portion 63. The first covering portion welded portion 61 welds the outer edge of the inner covering portion 52 to the outer edge of the outer covering portion 53. The first covering portion welded portion 61 forms the covering portion 51 into a bag shape. The core material 41 is accommodated in the bag-shaped covering portion 51.

[0026] The second covering portion welded portion 62 is annular. The second covering portion welded portion 62 welds the inner edge 56 of the inner covering portion 52 to the inner edge 56 of the outer covering portion 53. The second covering portion welded portion 62 is provided along the inner edge 47 of the first divided portion 42.

[0027] The third covering portion welded portion 63 is annular. The third covering portion welded portion 63 welds the inner edge 58 of the inner covering portion 52 to the inner edge 58 of the outer covering portion 53. The third covering portion welded portion 63 is provided along the inner edge 47 of the second divided portion 43.

[0028] Movement of each divided portion 42, 43 is restricted by the second covering portion welded portion 62 and the third covering portion welded portion 63. More specifically, when each divided portion 42, 43 attempts to move inside the covering portion 51, the inner edge 47 of each divided portion 42, 43 comes into contact with each covering portion welded portion 62, 63. This restricts movement of each divided portion 42, 43 beyond the range of the gap between the inner edge 47 of each divided portion 42, 43 and each covering portion welded portion 62, 63. The second covering portion welded portion 62 and the third covering portion welded portion 63 are restricting portions that restrict movement of the core material 41.

[0029] As shown in FIG. 4 , the first end 15 of the peripheral wall 12 is welded to the inner covering portion 52. More specifically, the first end 15 of the peripheral wall 12 is welded to the inner covering portion 52 around the entire periphery by a welding portion 64. As a result, the first end 15 of the peripheral wall 12 is closed by the bottom portion 40. The edge portion 45 of the first divided portion 42 extends between the retaining wall portion 20 and the third side wall portion 23. The edge portion 45 of the second divided portion 43 extends between the retaining wall portion 20 and the fourth side wall portion 24. The area surrounded by the peripheral wall 12 and the bottom portion 40 is the hair washing area S2. The second portions 46 of each divided portion 42, 43 and the second and third covered portions 55, 57 of each covered portion 52, 53 are located outside the hair washing area S2. The second covering portion welded portion 62 and the third covering portion welded portion 63 are provided outside the hair washing area S2.

[0030] As shown in FIG. 3 , the intake and exhaust unit 71 is provided on the peripheral wall 12. The intake and exhaust unit 71 connects the inside of the peripheral wall 12 to the outside of the peripheral wall 12. The intake and exhaust unit 71 is a pipe connected to a pump 72. The pump 72 may be electric or manual. Gas is supplied to the peripheral wall 12 by the pump 72. The gas may be exhausted from the peripheral wall 12 by the pump.

[0031] As shown in FIG. 2 , the discharge unit 81 is provided in the hair washing tub 11. In this embodiment, the discharge unit 81 is provided at the first corner 26, at the boundary between the peripheral wall 12 and the bottom 40. The discharge unit 81 includes a discharge pipe 82 and a lid 83. The discharge pipe 82 is cylindrical. The discharge pipe 82 penetrates the hair washing tub 11. The discharge unit 81 connects the inside and outside of the hair washing tub 11. The lid 83 switches between closing and opening the discharge pipe 82. When the lid 83 is attached to the discharge pipe 82, the discharge pipe 82 is closed. In this case, liquid is not discharged from the hair washing area S2 via the discharge unit 81. When the lid 83 is detached from the discharge pipe 82, the discharge pipe 82 is open. In this case, liquid is discharged from the hair washing area S2 via the discharge pipe 82.

[0032] The covering portion 51 includes a guide path S3. The guide path S3 is defined between the first divided portion 42 and the second divided portion 43. The guide path S3 is formed by the inner covering portion 52 entering the space between the first divided portion 42 and the second divided portion 43. The guide path S3 is recessed from the portion of the inner covering portion 52 that overlaps the first divided portion 42 and the second divided portion 43. The guide path S3 is provided facing the neck holding portion 25 when viewed from the height direction. The guide path S3 is arranged to extend linearly between the neck holding portion 25 and the discharge portion 81 when viewed from the height direction. The guide path S3 is provided at a central position between the first side wall portion 21 and the second side wall portion 22. The guide path S3 is arranged to extend through the hair washing area S2 toward the discharge portion 81. The guide path S3 and the discharge pipe 82 are connected when the discharge pipe 82 is open. In other words, the discharge section 81 is provided so that the inside of the discharge pipe 82 faces the guide path S3.

[0033] The peripheral wall 12 in a state where gas is being discharged from the peripheral wall 12 will be described. As shown in FIG. 8, the peripheral wall 12 can be folded when the gas has been discharged. By folding the peripheral wall 12, the hair washing tub 11 becomes a plate. The plate-shaped hair washing tub 11 can be further folded so that the first divided section 42 and the second divided section 43 overlap. In this case, the space surrounded by the second covering section welding section 62 and the space surrounded by the third covering section welding section 63 overlap. A user of the hair washing device 10 can insert their hand into this space to carry the hair washing device 10. In other words, the second section 46 can be used as a handle.

[0034] The operation of this embodiment will be described. 9, the hair washing device 10 is used when washing the hair of a subject M1 who is lying down. The bed 90 on which the subject M1 lies down includes a mattress 91 and a headboard 92.

[0035] When using the hair washer 10, first, the hair washer 10 is inserted between the head H1 of the subject M1 and the mattress 91. At this stage, gas has been discharged from the peripheral wall 12. Because the hair washing tub 11 is plate-shaped, the hair washer 10 can be easily inserted between the head H1 of the subject M1 and the mattress 91. The hair washer 10 is positioned so that the neck holder 25 is located below the neck N1 of the subject M1.

[0036] As shown in FIG. 10 , next, gas is supplied to the peripheral wall 12. The peripheral wall 12 rises from the bottom 40. The neck N1 of the subject M1 is held by the neck holder 25. The head H1 of the subject M1 is in contact with the bottom 40. In this state, the subject M1's hair is washed. Hair washing is performed, for example, by washing the scalp and hair with a hair wash and then rinsing the hair wash with a liquid such as warm water. During hair washing, the discharge pipe 82 may be closed or open. When the discharge pipe 82 is closed, hair washing can be performed using the liquid stored in the hair washing area S2. When the discharge pipe 82 is open, hair washing can be performed while the liquid used for hair washing is discharged outside the hair washing area S2. A pillow may be provided between the head H1 of the subject M1 and the bottom 40.

[0037] Although not shown, a hose is connected to the discharge pipe 82. This hose passes between the headboard 92 and the hair washing device 10. Similarly, the intake and exhaust unit 71 passes between the headboard 92 and the hair washing device 10. By making the peripheral wall 12 pentagonal when viewed from the height direction, the two side walls 23, 24 that face each other in the thickness direction of the retaining wall 20 are not parallel to the retaining wall 20. As a result, a gap is likely to form between the side walls 23, 24 and the headboard 92, and the hose and the intake and exhaust unit 71 can pass through this gap. This makes it easy to handle the hose and the intake and exhaust unit 71.

[0038] The liquid used for washing hair is discharged outside the hair washing area S2 through the discharge section 81. At this time, the liquid is guided to the discharge section 81 by the guide path S3, allowing the liquid to be discharged smoothly. A load is applied to the neck support section 25 from the neck N1 downward. As a result, the first side wall section 21 and the second side wall section 22 are lifted upward. When viewed from the height direction, the neck support section 25 and the guide path S3 face each other, and as the first side wall section 21 and the second side wall section 22 are lifted, the bottom section 40 is inclined downward toward the guide path S3. More specifically, the section between the guide path S3 and the first side wall section 21 at the bottom section 40 is inclined downward from the first side wall section 21 toward the guide path S3. The section between the guide path S3 and the second side wall section 22 at the bottom section 40 is inclined downward from the second side wall section 22 toward the guide path S3. According to this inclination, the liquid in the hair washing area S2 is guided to the guide path S3.

[0039] 11, after the hair washing is completed and the liquid is discharged, gas is discharged from the peripheral wall 12. Even after the gas is discharged from the peripheral wall 12, the peripheral wall 12 remains standing upright from the bottom 40.

[0040] The effects of this embodiment will be described. (1) A guide path S3 is defined between the first divided section 42 and the second divided section 43. This allows the liquid to be smoothly discharged from the hair washing area S2. This is hygienic because it prevents unsanitary liquid from remaining in the hair washing area S2. Furthermore, if the liquid is not smoothly discharged, the temperature of the liquid in the hair washing area S2 will decrease, which may cause a drop in the body temperature of the subject M1. By smoothly discharging the liquid, hair washing can be performed while reducing the burden on the subject M1.

[0041] (2) When viewed from the height direction, the guide path S3 extends between the neck holder 25 and the discharge portion 81. When the neck N1 is placed on the neck holder 25, the load applied from the neck N1 to the neck holder 25 causes the bottom 40 to tilt. This tilt allows the liquid in the hair washing area S2 to be guided into the guide path S3. This makes it possible to further smooth the discharge of the liquid.

[0042] (3) The cover welded portions 62, 63 restrict movement of the first divided portion 42 and the second divided portion 43. The cover welded portions 62, 63 are provided outside the hair washing area S2. Undulations occur in the areas where the cover welded portions 62, 63 are provided. If these undulations occur in areas facing the hair washing area S2, they can cause dirt to accumulate. By providing the cover welded portions 62, 63 outside the hair washing area S2, no undulations due to the cover welded portions 62, 63 occur in areas facing the hair washing area S2. Therefore, dirt is less likely to accumulate, and the hair washer 10 can be used hygienically.

[0043] (4) By dividing the core 41 into the first divided portion 42 and the second divided portion 43, the hair washer 10 can be folded with the gas discharged from the peripheral wall 12. Therefore, by dividing the core 41 into the first divided portion 42 and the second divided portion 43, the guide path S3 is formed to facilitate the discharge of liquid, and the hair washer 10 can be folded, thereby improving portability.

[0044] (5) The holding wall 20 expands when gas is supplied. The neck holding part 25 deforms to fit the neck N1 of the subject M1, thereby bringing the neck holding part 25 into close contact with the neck N1. Because a gap is unlikely to form between the neck N1 and the neck holding part 25, leakage of liquid from the gap between the neck N1 and the neck holding part 25 to the outside of the hair washing tub 11 can be prevented.

[0045] (6) The second welded portion 32 provided at the second corner 27 is annular. For the same welded area, the second welded portion 32 can be shaped to expand in the circumferential direction of the peripheral wall 12, compared to when the second welded portion 32 is linearly shaped extending in the height direction. This allows the second welded portion 32 to support the wall portions 20-24 when gas is discharged from the peripheral wall 12, making it easier for the peripheral wall 12 to remain standing upright from the bottom portion 40. After gas is discharged from the peripheral wall 12, the peripheral wall 12 is prevented from collapsing toward the subject M1. This prevents the subject M1 from feeling uncomfortable.

[0046] (7) By folding the peripheral wall 12, the hair washing tub 11 becomes flat. This makes it easy to insert the hair washing tub 11 below the head H1 of the subject M1. This reduces the amount of movement of the head H1 of the subject M1 during hair washing, thereby reducing the burden on the subject M1.

[0047] The embodiment can be modified as follows: The embodiment and the following modifications can be combined with each other within the scope of technical compatibility. The guide path S3 only needs to extend toward the discharge portion 81. For example, if the discharge portion 81 is provided at the boundary between the first side wall portion 21 and the bottom portion 40, the guide path S3 is provided to extend linearly between the first side wall portion 21 and the second side wall portion 22. In other words, the first divided portion 42 and the second divided portion 43 are provided to be spaced apart from each other in the thickness direction of the holding wall portion 20.

[0048] The shape of the taxiway S3 may be curved. The peripheral wall 12 may have a circular shape or a polygonal shape other than a pentagon when viewed in the height direction.

[0049] The first divided portion 42 and the second divided portion 43 may have different shapes. The restricting portion that restricts the movement of the first divided portion 42 and the second divided portion 43 may be provided inside the hair washing area S2. For example, the movement of the first divided portion 42 and the second divided portion 43 may be restricted by providing a covering portion welding portion along the edge 45 of the first divided portion 42 and a covering portion welding portion along the edge 45 of the second divided portion 43.

[0050] The inner wall 13 and the outer wall 14 may be bonded together to provide adhesive portions instead of the welded portions 31 to 33. The inner sheath portion 52 and the outer sheath portion 53 may be bonded together to provide a sheath adhesive portion instead of the sheath welded portions 61, 62, and 63.

[0051] The core 41 may have three or more divided sections. In this case, the two divided sections that define the guideway S3 are the first divided section and the second divided section. [Explanation of symbols]

[0052] 10...hair washing device, 12...circumferential wall, 15...first end, 16...second end, 25...neck holding portion, 40...bottom, 41...core material, 42...first divided portion, 43...second divided portion, 51...covering portion, 62...second covering portion welded portion as regulating portion, 63...third covering portion welded portion as regulating portion, 81...discharge portion.

Claims

1. a cylindrical peripheral wall that expands when gas is supplied and contracts when gas is discharged; a bottom portion closing one end of the peripheral wall in the height direction; A hair washing device comprising: a discharge part that discharges liquid from a hair washing area surrounded by the peripheral wall and the bottom part; the bottom portion includes a core material, a covering portion that covers the core material, and a restricting portion that restricts movement of the core material, The core material includes a first divided portion and a second divided portion provided at an interval from the first divided portion, the covering portion includes a guide path disposed between the first divided portion and the second divided portion so as to extend toward the discharge portion, The hair washer, wherein the restriction portion is provided outside the hair washing area.

2. The end portion closed by the bottom portion is defined as a first end portion, and the end portion in the height direction of the peripheral wall opposite to the first end portion is defined as a second end portion. The peripheral wall includes a neck holding portion recessed from the second end portion toward the first end portion, The hair washing device according to claim 1 , wherein the guide path is arranged to extend between the neck holding portion and the discharge portion.

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