JP2010104413A - Toilet seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet seat which can be easily disassembled. <P>SOLUTION: For the toilet seat, the lower surface of edge parts 15 and 16 of a seat surface member 10 and the upper surface of edge parts 21 and 22 of a seat back member 20 are welded, and a hollow part 30 is formed by the seat surface member 10 and the seat back member 20. A recessed part 17A opened to the outer peripheral side is provided on the lower end part of the edge part 16 on the outer peripheral side of the seat surface member 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a toilet seat.

  Patent Document 1 discloses a conventional toilet seat. In this toilet seat, a conductive heating element is disposed between the lower surface of the edge of the seat member and the upper surface of the edge of the seat back member. By applying a voltage to the conductive heating element, the lower surface of the edge portion of the seat member and the upper surface of the edge portion of the seat back member can be melted and welded. Further, by applying a voltage to the conductive heating element again after welding, the welded portion is melted and the seat member and the seat back member can be disassembled.

JP 2000-37323 A

  However, in the conventional toilet seat, in order to disassemble the seat member and the seat back member, a facility for applying a voltage to the conductive heating element is required. In addition, it takes time and effort to attach a toilet seat to the equipment. Furthermore, electric power is required when disassembling the seat surface member and the seat back member.

  This invention is made | formed in view of the said conventional situation, Comprising: It is set as the problem which should be solved to provide the toilet seat which can be decomposed | disassembled easily.

The toilet seat of the present invention is a toilet seat in which the lower surface of the edge portion of the seat surface member and the upper surface of the edge portion of the seat back member are welded, and a cavity is formed by the seat surface member and the seat back member.
It is provided in at least one of the lower end part of the edge part of the perimeter side of the seat member, or the upper end part of the edge part of the outer periphery side of the seat back member, and has a recess opening on the outer periphery side. To do.

  In this toilet seat, the tip of a tool such as a flat-blade screwdriver is inserted into the recess from the outside of the toilet seat and twisted to break the welded portion around the recess, and the edge of the seat surface member and the edge of the seat back member A gap can be created between them. While inserting a tool such as a flat-blade screwdriver into the gap so as to enlarge the gap generated in this way, by applying a force in the direction to separate the seat surface member and the seat back member, the entire welded portion is broken, and the seat The front member and the seat back member can be disassembled.

  Therefore, the toilet seat of the present invention can be easily disassembled.

  A plurality of recesses may be provided. In this case, by preparing a dedicated tool capable of simultaneously inserting the tip portions into the plurality of recesses, and simultaneously prying the plurality of recesses, the welded portion can be simultaneously broken in a wide range. For this reason, a seat surface member and a seat back member can be disassembled more easily.

  A first convex portion that protrudes downward along the cavity portion side may be provided at an edge portion on the outer peripheral side of the seat member, and the concave portion may be provided at a lower end portion of the first convex portion. In this case, the lower surface of the first convex portion is welded to the upper surface of the edge portion of the seat back member. By making the area of the lower surface of the first convex portion the necessary minimum having welding strength, the lower surface of the first convex portion can be reliably melted and welded with less energy. Further, since the welded portion is formed with the minimum necessary area, the welded portion can be easily broken, and the seat surface member and the seat back member can be easily disassembled.

  A second convex portion projecting upward along the cavity portion side may be provided at an outer peripheral side edge of the seat back member, and the concave portion may be provided at an upper end portion of the second convex portion. In this case, the upper surface of the second convex portion is welded to the lower surface of the edge portion of the seat member. By minimizing the area of the upper surface of the second convex portion to the necessary minimum with welding strength, the upper surface of the second convex portion can be reliably melted and welded with less energy. Further, since the welded portion is formed with the minimum necessary area, the welded portion can be easily broken, and the seat surface member and the seat back member can be more easily disassembled.

  On the outer peripheral side edge of the seat member, a gap is formed between the first convex portion or the second convex portion, and a hanging piece that hangs down along the outer surface of the seat member is provided. Can be. In this case, a molten resin (hereinafter referred to as “welding bead”) in which the lower surface of the edge portion (first convex portion) of the seat surface member and the upper surface of the seat back member (second convex portion) is melted is the end of the welded portion. Protrudes into the gap. For this reason, the welding bead protruding from the end of the welding portion can be concealed from the outside by the hanging piece. Therefore, the welding bead removal operation can be made unnecessary, and the toilet seat can have a clean appearance.

  Further, when the tip portion of a tool such as a flathead screwdriver is inserted into the recess, the hanging piece is elastically deformed, and the shaft portion of the tool such as the flathead screwdriver can be sandwiched and held between the upper surfaces of the seat back members. As a result, when disassembling the seat surface member and the seat back member, the tip of a tool such as a flat-blade screwdriver becomes difficult to come off from the recess, and the disassembling work can be easily performed.

  On the outer peripheral side of the seat back member, a gap is formed between the first convex portion or the second convex portion, and a rising piece is provided that rises along the outer surface of the seat back member. Can be. In this case, the weld bead in which the lower surface of the edge portion (first convex portion) of the seat surface member and the upper surface of the seat back member (second convex portion) are melted out from the end of the weld portion into the gap portion. For this reason, the welding bead protruding from the end of the welding portion can be concealed from the outside by the rising piece. Therefore, the welding bead removal operation can be made unnecessary, and the toilet seat can have a clean appearance.

  Also, when the tip of a tool such as a flathead screwdriver is inserted into the recess, the rising piece is elastically deformed, and the shaft portion of the tool such as a flathead screwdriver can be sandwiched and held between the lower surface of the seat member. . As a result, when disassembling the seat surface member and the seat back member, the tip of a tool such as a flat-blade screwdriver becomes difficult to come off from the recess, and the disassembling work can be easily performed.

  The said recessed part may be provided only in the edge part of the outer peripheral side of the said seat surface member or the said seat back member extended facing back. In this case, it is difficult for the user of the toilet seat to visually recognize the concave portion, and a toilet seat having a good appearance can be provided.

  Embodiments 1 to 4 embodying the toilet seat of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 and 2, the toilet seat according to the first embodiment is formed in a substantially trapezoidal shape in which the front end portion and the rear end portion are substantially parallel and the front end portion is shorter than the rear end portion in plan view. . A substantially oval opening that is long in the front-rear direction is formed at the center of the toilet seat. At the rear end of the toilet seat, a pair of hinge portions 11 extending rearward is formed at two locations on the left and right. The hinge portion 11 has a through hole 12 formed in the left-right direction. A shaft member extending from the case main body of the toilet seat device attached to the upper surface of the toilet main body (not shown) is inserted through the through hole 12. By attaching the toilet seat device to the upper surface of the toilet main body, the toilet seat is rotatably attached to the toilet main body.

  As shown in FIG. 3, the toilet seat includes a seat member 10 and a seat back member 20, and a cavity 30 is formed by the seat member 10 and the seat back member 20 (FIG. 3 shows FIG. 1). Is a cross-sectional view taken along line XX in FIG. At the rear part of the toilet seat, the seat member 10 has an upper plate part (sitting part) 13 extending obliquely downward from the upper end of the rear part toward the front and a rear plate part 14 extending vertically downward from the upper part of the rear part. . The upper plate portion 13 is curved so that the rear upper surface is recessed downward. A front end portion of the upper plate portion 13 is curved downward to form an edge portion 15 on the inner peripheral side of the seat member 10. Further, the lower end portion of the rear plate portion 14 forms an edge portion 16 on the outer peripheral side of the seat member 10. A heating element made of a nichrome wire (not shown) and an aluminum sheet, which generates heat when energized, is attached to the inner surface of the upper plate 13 on the side of the cavity 30.

  An inner peripheral piece 15 </ b> A that hangs downward along the inner peripheral surface of the seat member 10 is provided on the inner peripheral edge 15 of the seat member 10. The edge 16 on the outer peripheral side of the seat member 10 is provided with a first protrusion 17 that protrudes downward along the cavity 30 side. A concave portion 17 </ b> A that opens to the outer peripheral side is provided at the lower end portion of the first convex portion 17. In the recess 17A, the tip of the flathead screwdriver D can be inserted from behind. Further, as shown in FIG. 1, the concave portion 17A is a rear end portion of the toilet seat, and is equidistant only at three places on the outer peripheral side edge portion 16 of the seat member 10 that extends rearward. Is provided. For this reason, it is difficult for the user of the toilet seat to visually recognize the concave portion 17 </ b> A, and a toilet seat having a good appearance can be provided.

  As shown in FIGS. 3 and 4, a gap 31 is formed between the outer peripheral edge 16 of the seat member 10 and the first convex portion 17, and along the outer surface of the seat member 10. A hanging piece 18 is provided. The first convex portion 17 is formed so as to protrude below the hanging piece 18. For this reason, the lower surface of the 1st convex part 17 is welded to the upper surface of the edge 22 of the outer peripheral side of the seat back member 20 mentioned later. The area of the lower surface of the first convex portion 17 is minimized to have welding strength. For this reason, the lower surface of the 1st convex part 17 can be reliably fuse | melted and welded with little energy. Further, the weld bead 42 protrudes into the gap portion 31 from the end of the weld portion 41. For this reason, the welding bead 42 protruding from the end of the welding portion 41 can be concealed from the outside by the hanging piece 18. Therefore, the removal work of the welding bead 42 can be made unnecessary, and the appearance of the toilet seat can be made clean. There is a gap 18 </ b> A between the lower end of the hanging piece 18 and the upper surface of the edge 22 on the outer peripheral side of the seat back member 20.

  The seat back member 20 extends obliquely downward from the rear toward the front at the rear portion of the toilet seat. The lower surface of the seat back member 20 is formed flat. The front end portion of the seat back member 20 forms an edge 21 on the inner peripheral side of the seat back member 20. Further, the rear end portion of the seat back member 20 rises upward to form an edge 22 on the outer peripheral side of the seat back member 20. The upper surface of the edge 22 on the outer peripheral side of the seat back member 20 is formed flat.

  The edge 21 on the inner peripheral side of the seat back member 20 is provided with a third protrusion 23 that protrudes upward along the cavity 30 side. In addition, a tip end piece 24 is formed at the tip end of the edge portion 21 on the inner peripheral side of the seat back member 20 so as to form a groove portion 51 with the third convex portion 23 and rise upward. The third convex portion 23 protrudes above the tip piece 24. For this reason, the upper surface of the 3rd convex part 23 is welded to the lower surface inside the inner peripheral piece 15A provided in the edge 15 of the seat surface member 10. FIG. The upper surface of the tip piece 24 of the seat back member 20 is in contact with the lower surface of the inner peripheral piece 15 </ b> A of the seat member 10.

  When disassembling the toilet seat of the first embodiment formed in this way into the seat member 10 and the seat back member 20, as shown in FIG. 4, the tip of the flathead screwdriver D is inserted into the gap 18A from the rear of the toilet seat. To do. Since the drooping piece 18 is elastically deformed, the tip of the minus driver D can be inserted into each recess 17 </ b> A via the gap 31. At this time, the hanging piece 18 can sandwich and hold the shaft portion of the minus driver D between the upper surface of the edge portion 22 of the seat back member 20. For this reason, the tip of the flathead screwdriver D is hard to come off from the recess 17A, and the disassembling work can be easily performed.

  After inserting the tip of the minus driver D into the recess 17A, the recess 17A is squeezed so that the rear end of the driver D is pushed downward with the rear corner 20 of the seat back member 20 as a fulcrum. Thereby, a force acts in a direction in which the edge 16 on the outer peripheral side of the seat member 10 is separated from the edge 22 on the outer peripheral side of the seat back member 20, and the welded portion 41 is broken to create a gap. Since the welding part 41 in which the recessed part 17A is formed has a welding width narrower than other welding locations, it can be easily broken to generate a gap.

  In this way, the welded portion 41 around each recess 17A is broken to create a gap. Thereafter, a force is applied in a direction in which the seat surface member 10 and the seat back member 20 are pulled apart while inserting the flathead screwdriver D into the gap so as to enlarge the generated gap. As a result, the entire welded portion 41 on the outer peripheral side and the welded portion 41 on the inner peripheral side are broken, and the seat member 10 and the seat back member 20 are separated. At this time, since the area of the lower surface of the first convex portion is minimized to have welding strength, the welding portion 41 can be easily broken, and the seat surface member 10 and the seat back member 20 can be easily separated. Can be broken down into

  Therefore, the toilet seat of Example 1 can be easily disassembled.

  As shown in FIG. 5, the toilet seat of the second embodiment has a configuration different from that of the first embodiment in the configuration of the outer peripheral edge 16 of the seat member 10 and the outer peripheral edge 22 of the seat back member 20. Is. Since the other configuration is the same as that of the first embodiment, the same reference numeral is given to the same configuration, and the description of the structure, operation, and effect is omitted.

  The lower surface of the edge 16 on the outer peripheral side of the seat member 10 of Example 2 is formed flat. A second convex portion 25 that protrudes upward along the cavity portion 30 side is provided on the outer peripheral edge portion 22 of the seat back member 20. A concave portion 25 </ b> A that opens to the outer peripheral side is provided at the upper end portion of the second convex portion 25. The recessed portion 25A is a rear end portion of the toilet seat, and is provided at only three positions on the outer peripheral side edge portion 22 of the seat back member 20 that extends facing rearward at equal intervals. For this reason, it is difficult for the user of the toilet seat to visually recognize the concave portion 25 </ b> A, and a toilet seat having a good appearance can be provided.

  On the outer peripheral edge 22 of the seat back member 20, a gap 32 is formed between the second convex portion 25 and a rising piece 26 that rises along the outer surface of the seat back member 20 is provided. . The second convex portion 25 is formed to protrude upward from the rising piece 26. For this reason, the upper surface of the 2nd convex part 25 is welded to the lower surface of the edge part 16 of the outer peripheral side of the seat member 10. FIG. The area of the upper surface of the 2nd convex part 25 is made into the required minimum which has welding strength. For this reason, the upper surface of the 2nd convex part 25 can be reliably fuse | melted and welded with little energy. Further, the weld bead 42 protrudes into the gap portion 32 from the end of the weld portion 41. For this reason, the welding bead 42 protruding from the end of the welding portion 41 can be concealed from the outside by the rising piece 26. Therefore, the removal work of the welding bead 42 can be made unnecessary, and the appearance of the toilet seat can be made clean. There is a gap 26 </ b> A between the rising piece 26 and the lower surface of the edge 16 on the outer peripheral side of the seat member 10.

  When disassembling the toilet seat of Example 2 formed in this way into the seat surface member 10 and the seat back member 20, the tip of the minus driver is inserted into the gap 26A from the rear of the toilet seat. Since the rising piece 26 is elastically deformed, the tip of the minus driver can be inserted into the recess 25 </ b> A through the gap portion 32. At this time, the rising piece 26 can hold and hold the shaft portion of the minus driver between the lower surface of the edge portion 16 on the outer peripheral side of the seat member 10. For this reason, the tip of the flathead screwdriver is hard to come off from the recess 25A, and the disassembling work can be easily performed.

  After inserting the tip of the minus driver into the recess 25A, the recess 25A is squeezed so that the rear end of the driver 10 is pulled upward with the rear end lower corner F2 of the seating member 10 as a fulcrum. As a result, a force acts in a direction in which the edge 22 on the outer peripheral side of the seat back member 20 is separated from the edge 16 on the outer peripheral side of the seat member 10, and the welded portion 41 is broken to create a gap. Since the welding part 41 in which the concave part 25 </ b> A is formed has a welding width narrower than that of other welding parts, it can be easily broken to generate a gap.

  In this way, the welded portion 41 around each recess 25A is broken to create a gap. Thereafter, a force is applied in a direction to separate the seat member 10 and the seat back member 20 while inserting a flathead screwdriver into the gap so as to enlarge the generated gap. Thereby, the welding part 41 of an outer peripheral side and the whole welding part 41 of an inner peripheral side are fractured | ruptured, and the seat surface member 10 and the seat back member 20 can be isolate | separated. At this time, since the area of the upper surface of the second convex portion is minimized to have the welding strength, the welding portion 41 can be easily broken, and the seat surface member 10 and the seat back member 20 can be easily separated. Can be broken down into

  Therefore, the toilet seat of Example 2 can also be easily disassembled.

  As shown in FIG. 6, the toilet seat of the third embodiment is different from the first and second embodiments in the configuration of the outer peripheral edge 16 of the seat member 10 and the outer peripheral edge 22 of the seat back member 20. It is what. Since other configurations are the same as those in the first and second embodiments, the same components are denoted by the same reference numerals, and description of the structure, operation, and effect is omitted.

  In the edge 16 on the outer peripheral side of the seat member 10 of the third embodiment, a gap 33 is formed between the first protrusion 17 projecting downward along the cavity 30 side and the first protrusion 17. A hanging piece 18 is provided to hang down along the outer surface of the seat member 10. A second convex portion 25 that protrudes upward along the cavity portion 30 side is provided on the outer peripheral edge portion 22 of the seat back member 20. A concave portion 25 </ b> A that opens to the outer peripheral side is provided at the upper end portion of the second convex portion 25. The lower surface of the 1st convex part 17 and the upper surface of the 2nd convex part 25 are welded. The areas of the lower surface of the first convex portion 17 and the upper surface of the second convex portion 25 to be welded are minimized to have the welding strength. For this reason, welding can be performed with less energy. The weld bead 42 protrudes from the end of the weld portion 41 into the gap portion 33. For this reason, the welding bead 42 protruding from the end of the welding portion 41 can be concealed from the outside by the hanging piece 18. Therefore, the removal work of the welding bead 42 can be made unnecessary, and the appearance of the toilet seat can be made clean. The hanging piece 18 extends below the first convex portion, and a lower surface of the hanging piece 18 and an upper surface of the edge portion 22 on the outer peripheral side of the seat back member 20 have a gap 18A.

  When disassembling the toilet seat of Example 3 formed in this way into the seat surface member 10 and the seat back member 20, the tip of the minus driver is inserted into the gap 18A from the rear of the toilet seat. Since the drooping piece 18 is elastically deformed, the tip of the minus driver can be inserted into the recess 25 </ b> A through the gap 33. At this time, the hanging piece 18 can hold and hold the shaft portion of the minus driver between the upper surface of the edge portion 22 on the outer peripheral side of the seat back member 20. For this reason, the tip of the flathead screwdriver is hard to come off from the recess 25A, and the disassembling work can be easily performed.

  After inserting the front end of the minus driver into the recess 25A, the recess 25A is squeezed so that the rear end of the seat back member 20 is pushed downward and the rear of the driver is pushed downward. Thereby, a force acts in a direction in which the edge 16 on the outer peripheral side of the seat member 10 is separated from the edge 22 on the outer peripheral side of the seat back member 20, and the welded portion 41 is broken to create a gap. Since the welding part 41 in which the concave part 25 </ b> A is formed has a welding width narrower than that of other welding parts, it can be easily broken to generate a gap.

  In this way, the welded portion 41 around each recess 25A is broken to create a gap. Thereafter, a force is applied in a direction to separate the seat member 10 and the seat back member 20 while inserting a flathead screwdriver into the gap so as to enlarge the generated gap. Thereby, the welding part 41 of an outer peripheral side and the whole welding part 41 of an inner peripheral side are fractured | ruptured, and the seat surface member 10 and the seat back member 20 can be isolate | separated. At this time, since the area of the lower surface of the first convex portion 17 and the upper surface of the second convex portion 25 that are welded is minimized to have the welding strength, the welded portion 41 can be easily broken, The seat member 10 and the seat back member 20 can be easily disassembled.

  Therefore, the toilet seat of Example 3 can also be easily disassembled.

  As shown in FIG. 7, the toilet seat according to the fourth embodiment is different from the first to third embodiments in the configurations of the outer peripheral edge 16 of the seat member 10 and the outer peripheral edge 22 of the seat back member 20. It is what. Since other configurations are the same as those in the first to third embodiments, the same configurations are denoted by the same reference numerals, and descriptions of the structure, operation, and effects are omitted.

  A recess 19 that opens to the outer peripheral side is provided at the lower end of the outer peripheral edge 16 of the seat member 10 of the fourth embodiment. The concave portion 19 can be inserted from the rear end of a flathead screwdriver. Moreover, the recessed part 19 is a rear-end part of a toilet seat, and is provided in 3 places of the edge part 16 of the outer peripheral side of the seat surface part seat 10 extended facing back at equal intervals. For this reason, the recessed part 19 is hard to be visually recognized by the user of a toilet seat, and the toilet seat with good appearance can be provided. The upper surface of the edge 22 on the outer peripheral side of the seat back member 20 is formed flat. The lower surface of the edge 16 on the outer peripheral side of the seat member 10 and the upper surface of the edge 22 on the outer peripheral side of the seat back member 20 are welded together. The weld bead 42 protruding from the outer surfaces of the seat surface member 10 and the seat back member 20 is cut.

  When disassembling the toilet seat of Example 4 formed in this way into the seat surface member 10 and the seat back member 20, the tip of the minus driver is inserted into the recess 19 from the rear of the toilet seat. Thereafter, the rear end 20 of the seat back member 20 is used as a fulcrum, and the concave portion 19 is squeezed so that the rear of the driver is pushed downward. Thereby, a force acts in a direction in which the edge 16 on the outer peripheral side of the seat member 10 is separated from the edge 22 on the outer peripheral side of the seat back member 20, and the welded portion 41 is broken to create a gap. Since the welding part 41 in which the recessed part 19 is formed has a welding width narrower than other welding locations, it can be easily broken and a gap can be generated.

  In this manner, the welded portion 41 around each recess 19 is broken to create a gap. Thereafter, a force is applied in a direction to separate the seat member 10 and the seat back member 20 while inserting a flathead screwdriver into the gap so as to enlarge the generated gap. Thereby, the welding part 41 of an outer peripheral side and the whole welding part 41 of an inner peripheral side are fractured | ruptured, and the seat surface member 10 and the seat back member 20 can be isolate | separated.

Therefore, the toilet seat of Example 4 can also be disassembled easily.
<< Other Examples >>

The present invention is not limited to the first to fourth embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Examples 1 to 4 above, the welded portion was broken by inserting and squeezing a flathead screwdriver into the recess. Thus, the welded portion may be broken simultaneously in a wide range by simultaneously prying the plurality of recesses.
(2) In the first to fourth embodiments, the recess is the rear end of the toilet seat, and is provided only on the outer peripheral side edge of the seat member or the seat back member extending facing rearward. You may provide in the edge part of the outer peripheral side of the seat member or seat back member extended facing the left or right or the front of a toilet seat.
(3) In the said Examples 1-4, although the recessed part is provided in three places, only one place may be provided and two or more places may be provided.

2 is a plan view illustrating a toilet seat according to Embodiment 1. FIG. FIG. 3 is a side view illustrating the toilet seat according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1 showing the toilet seat of the first embodiment. 2 is a partially enlarged cross-sectional view showing a toilet seat of Example 1. FIG. 6 is a cross-sectional view illustrating a toilet seat of Example 2. FIG. 10 is a cross-sectional view of a main part showing a toilet seat of Example 3. FIG. FIG. 6 is a cross-sectional view of a main part showing a toilet seat of Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Seat member 16 ... Peripheral edge part (of seat member) 17 ... 1st convex part 18 ... Hanging piece 17A, 19, 25A ... Concave part 20 ... Seat back member 22 ... Outer side (of seat back member) 25 ... 2nd convex part 26 ... Standing piece 30 ... Cavity part 31, 32, 33 ... Cavity part

Claims (8)

In the toilet seat in which the lower surface of the edge of the seat member and the upper surface of the edge of the seat member are welded, and a cavity is formed by the seat member and the seat member,
It is provided in at least one of the lower end part of the edge part of the perimeter side of the seat member, or the upper end part of the edge part of the outer periphery side of the seat back member, and has a recess opening on the outer periphery side. Toilet seat.   A first convex portion that protrudes downward along the cavity portion side is provided at an outer peripheral side edge of the seat member, and the concave portion is provided at a lower end portion of the first convex portion. The toilet seat according to claim 1.   A second convex portion projecting upward along the cavity portion side is provided at an outer peripheral side edge of the seat back member, and the concave portion is provided at an upper end portion of the second convex portion. The toilet seat according to claim 1 or 2, characterized in that   On the outer peripheral side of the seat member, a gap is formed between the first convex portion and a hanging piece is provided that hangs along the outer surface of the seat member. The toilet seat according to claim 2.   On the outer peripheral side of the seat member, a gap is formed between the second convex portion and a hanging piece is provided that hangs along the outer surface of the seat member. The toilet seat according to claim 3.   On the outer peripheral side of the seat back member, a gap is formed between the first convex portion and a rising piece is provided that rises along the outer surface of the seat back member. The toilet seat according to claim 2.   On the outer peripheral side of the seat back member, a gap is formed between the second convex portion and a rising piece is provided that rises along the outer surface of the seat back member. The toilet seat according to claim 3.   The toilet seat according to any one of claims 1 to 7, wherein the concave portion is provided only at an outer peripheral side edge of the seat member or the seat back member extending facing rearward.

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