JP5826040B2 - Toilet seat unit - Google Patents

Description

  Aspects of the invention generally relate to toilet seat units.

  The toilet seat unit generally includes a toilet seat surface member as an upper plate and a toilet seat back member as a lower plate. When the material forming the toilet seat surface member is the same type of resin as the material forming the toilet seat back member, the toilet seat surface member and the toilet seat back member are generally bonded to each other by welding.

  On the other hand, in recent years, a so-called instantaneous heating toilet seat apparatus is known that waits at a relatively low temperature when the toilet seat is not used and warms the seating surface in a relatively short time when the toilet seat is used. In such an instantaneous heating toilet seat device, in order to improve the heating performance of the toilet seat, it is also conceivable that the toilet seat surface member is formed of fiber reinforced plastic and the toilet seat back member is formed of a material different from the toilet seat surface member. However, when the material of the toilet seat surface member is different from the material of the toilet seat back member, there is a problem that the toilet seat surface member and the toilet seat back member cannot be joined by welding or are difficult to join.

  On the other hand, there exists a toilet seat unit which has a convex rib, the concave groove fitted to a convex rib, and the sealing material with which the concave groove was mounted | worn (patent document 1). However, as described in Patent Document 1, the bonding strength when the convex rib and the concave groove are fitted tends to be lower than the bonding strength of the welded joint. Therefore, there is a problem that the toilet seat surface member is easily detached from the toilet seat back surface member. Further, in the case of a structure in which the convex rib and the concave groove are fitted, there is a problem that the airtightness and liquid tightness are low even if a sealing material is provided.

  On the other hand, there is a method for manufacturing a resin product in which a plurality of resin parts are joined with a joining resin by filling a passage with a joining resin (Patent Document 2). However, in the resin product manufacturing method described in Patent Document 2, the bonding resin is visible from the outside. Therefore, when the bonding resin is different from the toilet seat unit, there is a problem that the appearance of the toilet seat unit is impaired. Moreover, in the manufacturing method of the resin product described in patent document 2, there exists a possibility that joining resin may protrude outside the resin product.

Japanese Patent Laid-Open No. 10-23992 JP 2000-272014 A

  The present invention has been made on the basis of recognition of such problems, and provides a toilet seat unit that can enhance the bonding strength, air tightness, and liquid tightness, or can ensure the appearance design. Objective.

  1st invention is provided with the toilet seat surface member and the toilet seat back surface member, and either one of the said toilet seat surface member and the said toilet seat back surface member has the cyclic | annular protrusion part each provided in the inner peripheral side and the outer peripheral side. One of the toilet seat surface member and the toilet seat back surface member has an annular recess that is provided on each of an inner peripheral side and an outer peripheral side and can be engaged with the protruding portion. Protruding ribs are provided on at least one of the side wall and the side wall on the back surface side of the concave portion, and the protruding portion is pushed to the front surface side by the protruding rib in a state where the protruding portion and the concave portion are engaged. The toilet seat surface member and the toilet seat back member are formed by an adhesive interposed between at least a part of the front side wall of the protrusion and the side wall of the recess, and interposed between the protrusion and the recess. Was joined A toilet seat unit which is characterized.

  According to this toilet seat unit, in a state where the protrusion and the recess are engaged, the protrusion is pushed to the surface side by the protruding rib, and at least a part of the side wall on the surface side of the protrusion is on the surface side of the recess. Touch the side wall. And the toilet seat surface member and the toilet seat back surface member are joined by the adhesive agent interposed between a protrusion part and a recessed part. Therefore, it can suppress that an adhesive protrudes between the side wall by the side of the surface of a protrusion part, and the side wall by the side of the surface of a recessed part. Thereby, the joint strength of a junction part can be strengthened more. In addition, the adhesive between the protrusion and the recess seals the region from the bottom surface of the recess to the upper portion of the side wall on the back surface side of the recess, thereby improving the airtightness and liquid tightness of the toilet seat unit. it can.

  The second invention is the toilet seat unit according to the first invention, wherein an inclined surface that gradually recedes from the front surface side toward the back surface side is formed at the tip of the protruding portion.

  According to this toilet seat unit, compared with the case where the inclined surface is not formed, the adhesive tends to spread from the bottom surface of the concave portion to the region of the upper portion of the side wall on the back surface side of the concave portion. Thereby, the assembly property of a toilet seat unit can be improved.

  According to a third aspect of the present invention, there is provided the toilet seat unit according to the first or second aspect, wherein a sneak-proof rib that protrudes toward the protrusion is provided on a bottom surface of the recess.

  According to this toilet seat unit, the adhesive is suppressed from spreading to the inner peripheral side and the outer peripheral side from the wraparound prevention rib. Therefore, it can further suppress that the adhesive protrudes between the side wall on the surface side of the protrusion and the side wall on the surface side of the recess.

  Moreover, 4th invention is 1st-3rd invention. WHEREIN: Either one of the said toilet seat surface member and the said toilet seat back surface member is provided in the surface side of the said protrusion part, The said toilet seat surface member and the said toilet seat It has a stopper part which can come into contact with the surface side of the other concave part of the back member, and a first groove part which can store at least a part of the adhesive is formed in the stopper part. Toilet seat unit.

  According to this toilet seat unit, even if the adhesive enters between the side wall on the surface side of the protrusion and the side wall on the surface side of the recess, the first groove portion has at least a part of the adhesive. Can be stored. Therefore, it can further suppress that the adhesive protrudes between the side wall on the surface side of the protrusion and the side wall on the surface side of the recess.

  The fifth invention is the toilet seat unit according to any one of the first to fourth inventions, wherein a second groove that can store at least a part of the adhesive is formed on the bottom surface of the recess. .

  According to this toilet seat unit, even if the adhesive tries to enter between the side wall on the surface side of the protrusion and the side wall on the surface side of the recess, the second groove portion has at least a part of the adhesive. Can be stored. Therefore, it can further suppress that the adhesive protrudes between the side wall on the surface side of the protrusion and the side wall on the surface side of the recess.

  According to the aspect of the present invention, there is provided a toilet seat unit that can enhance the bonding strength, air tightness, and liquid tightness, or can ensure the appearance design.

It is a plane schematic diagram showing the toilet seat unit concerning embodiment of this invention. It is an exploded schematic diagram showing the toilet seat unit concerning this embodiment. It is a cross-sectional schematic diagram which illustrates an example of the manufacturing process of the toilet seat unit concerning this embodiment. It is a disassembled schematic diagram showing the toilet seat unit concerning other embodiment of this invention. It is a cross-sectional schematic diagram which illustrates an example of the manufacturing process of the toilet seat unit concerning this embodiment. It is a disassembled schematic diagram showing the toilet seat unit concerning other embodiment of this invention. It is a cross-sectional schematic diagram which illustrates an example of the manufacturing process of the toilet seat unit concerning this embodiment. It is a disassembled schematic diagram showing the toilet seat unit concerning other embodiment of this invention. It is a disassembled schematic diagram showing the toilet seat unit concerning other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic plan view showing a toilet seat unit according to an embodiment of the present invention.
FIG. 2 is an exploded schematic view showing the toilet seat unit according to the present embodiment.
FIG. 2 is a schematic cross-sectional view when the toilet seat unit is disassembled at the section AA shown in FIG.

  The toilet seat unit 10 according to the present embodiment includes a toilet seat surface member 100 and a toilet seat back surface member 200. As illustrated in FIG. 2, the toilet seat surface member 100 is provided so as to cover the toilet seat back member 200 from above in a use state of the toilet seat unit 10 (a state in which a user can be seated). The upper surface of the toilet seat surface member 100 forms a seating surface 101 on which a user of the toilet seat unit 10 can sit.

  As shown in FIG. 2, the toilet seat surface member 100 includes a first inner peripheral portion 110 provided on the inner peripheral side of the toilet seat unit 10 and a first outer peripheral portion 150 provided on the outer peripheral side of the toilet seat unit 10. And having. The first inner peripheral portion 110 is provided with an annular inner peripheral protrusion 130 that protrudes toward the toilet seat back member 200. The first outer peripheral portion 150 is provided with an annular outer peripheral protrusion 170 that protrudes toward the toilet seat back member 200.

  The toilet seat back member 200 includes a second inner peripheral portion 201 provided on the inner peripheral side of the toilet seat unit 10 and a second outer peripheral portion 203 provided on the outer peripheral side of the toilet seat unit 10. The second inner peripheral portion 201 is provided with an inner peripheral surface side protruding portion 210 and an inner peripheral rear surface side protruding portion 220 that protrude toward the toilet seat surface member 100. The second outer peripheral portion 203 is provided with an outer peripheral surface side protruding portion 250 and an outer peripheral back surface side protruding portion 260 that protrude toward the toilet seat surface member 100. Between the inner peripheral surface side protruding portion 210 and the inner peripheral back surface side protruding portion 220, an inner peripheral side concave portion 230 is formed. An outer peripheral recess 270 is formed between the outer peripheral surface side protruding portion 250 and the outer peripheral back surface side protruding portion 260.

  In the specification of the present application, the “surface” refers to a surface on the outside (appearance) side of the toilet seat unit 10. Further, the “back surface” refers to a surface on the inner side of the toilet seat unit 10.

  The inner peripheral protrusion 130 of the toilet seat surface member 100 can be engaged with the inner peripheral recess 230 of the toilet seat back member 200. Further, the outer peripheral side protruding portion 170 of the toilet seat surface member 100 can be engaged with the outer peripheral side concave portion 270 of the toilet seat back surface member 200.

  In addition, the inner peripheral side protruding portion 130 may be provided on the second inner peripheral portion 210 of the toilet seat back surface member 200, and the outer peripheral side protruding portion 170 may be provided on the second outer peripheral portion 250 of the toilet seat back surface member 200. On the other hand, the inner peripheral recess 230 may be provided in the first inner periphery 110 of the toilet seat surface member 100, and the outer peripheral recess 270 may be provided in the first outer periphery 150 of the toilet seat surface member 100. This case is included in the scope of the present invention as long as the characteristics of the present invention are included. In the present embodiment, as shown in FIG. 2, the inner peripheral protrusion 130 and the outer peripheral protrusion 170 are provided on the toilet seat surface member 100, and the inner peripheral recess 230 and the outer peripheral recess 270 are provided on the toilet seat back member 200. The case where it is provided will be described as an example.

  On the back surface side wall 233 of the inner peripheral recess 230, an inner peripheral projecting rib 240 protruding toward the inner peripheral side wall 231 of the inner peripheral recess 230 is provided. On the rear surface side wall 273 of the outer peripheral recess 270, outer peripheral projecting ribs 280 that protrude toward the front surface side wall 271 of the outer peripheral recess 270 are provided. The inner peripheral protruding rib 240 is provided, for example, in the inner peripheral recess 230 at the position indicated by the arrow A1 shown in FIG. The outer peripheral protruding rib 280 is provided, for example, in the outer peripheral recess 270 at the position indicated by the arrow A2 shown in FIG. That is, each of the inner peripheral protruding rib 240 and the outer peripheral protruding rib 280 is provided so as to be spaced over the entire circumference of the toilet seat unit 10. The inner peripheral side protruding rib 240 and the outer peripheral side protruding rib 280 extend in the vertical direction.

  The inner peripheral protruding rib 240 may be formed from the back side wall 133 of the inner peripheral protrusion 130 toward the inside of the toilet seat unit 10. Further, the outer circumferential protruding rib 280 may be formed from the back side wall 173 of the outer circumferential projection 170 toward the inside of the toilet seat unit 10.

FIG. 3 is a schematic cross-sectional view illustrating an example of the manufacturing process of the toilet seat unit according to this embodiment.
In the toilet seat unit 10 according to the present embodiment, the inner peripheral engagement form (for example, the engagement form between the inner peripheral protrusion 130 of the toilet seat surface member 100 and the inner peripheral recess 230 of the toilet seat back member 200). Is the same as the outer peripheral engagement form (for example, the engagement form of the outer peripheral protrusion 170 of the toilet seat surface member 100 and the outer peripheral recess 270 of the toilet seat back member 200). Therefore, in the following manufacturing process, the inner peripheral engagement mode will be mainly described.

  When assembling the toilet seat unit 10 according to the present embodiment, as shown in FIG. 3A, first, the adhesive 300 is applied to the inner peripheral recess 230. The adhesive 300 is preferably applied to the bottom surface 235 of the inner peripheral recess 230. Furthermore, it is more preferable to apply to the back side wall 233 side. Thereby, higher joint strength can be ensured.

  Subsequently, as illustrated in FIG. 3B, the inner peripheral protrusion 130 of the toilet seat surface member 100 and the inner peripheral recess 230 of the toilet seat back member 200 are engaged. Then, the back side wall 133 of the inner peripheral side protruding portion 130 comes into contact with the inner peripheral side protruding rib 240 provided in the inner peripheral side concave portion 230. Thereby, the inner peripheral side protrusion 130 is pushed toward the inner peripheral side of the toilet seat unit 10. Then, at least a part of the front surface side wall 131 of the inner peripheral projection 130 contacts the front surface side wall 231 of the inner peripheral recess 230.

  Subsequently, as shown in FIG. 3C, the inner peripheral side stepped portion (stopper portion) 111 (see FIG. 2 and FIG. 3B) of the toilet seat surface member 100 is the surface of the inner peripheral surface side protruding portion 210. When the toilet seat surface member 100 is pushed toward the toilet seat back surface member 200 until it comes into contact with the upper end portion 211 on the side, the adhesive 300 causes the gap S1 between the inner peripheral side protruding portion 130 and the inner peripheral back surface side protruding portion 220, specifically Specifically, the region extends from the bottom surface 235 of the inner peripheral recess 230 to the upper portion of the back side wall 233. Then, the toilet seat surface member 100 and the toilet seat back surface member 200 are joined by the adhesive 300 present in the gap S1.

  At this time, since at least a part of the front surface side wall 131 of the inner peripheral protrusion 130 is in contact with the front surface side wall 231 of the inner peripheral recess 230, the adhesive 300 is applied to the front side wall of the inner peripheral protrusion 130. It can suppress that it protrudes to the inner peripheral side from between 131 and the surface side side wall 231 of the inner peripheral side recessed part 230. FIG. Thereby, the designability of the external appearance of the toilet seat unit 10 is securable. Moreover, since the area | region which covers the upper part of the back surface side wall 233 from the bottom face 235 of the inner peripheral side recessed part 230 is sealed with the adhesive agent 300, the airtightness and liquid tightness of the toilet seat unit 10 can be improved.

  As shown in FIG. 2, an inner peripheral inclined surface 137 is formed at the tip of the inner peripheral protrusion 130. The inner peripheral inclined surface 137 gradually recedes from the front surface side toward the back surface side, that is, the seating surface 101 side. The inner peripheral inclined surface 137 is not limited to a flat surface, and may be a curved surface.

  Therefore, compared with the case where the inner peripheral side inclined surface 137 is not formed, the adhesive 300 is likely to spread from the bottom surface 235 of the inner peripheral side concave portion 230 to the region extending from the bottom surface side wall 233. Thereby, the assembly property of the toilet seat unit 10 can be improved. Further, as shown in FIG. 3C, an inner peripheral back surface side inclined surface 237 that is gradually retracted from the front surface side toward the back surface side, that is, the toilet seat surface member 100 side, is formed at the bottom of the inner peripheral recess 230. In the case where the inner circumferential back side inclined surface 237 is not formed, the adhesive 300 is more easily spread on the upper side of the back side wall 233 than when the inner circumferential back side inclined surface 237 is not formed. Therefore, the assemblability of the toilet seat unit 10 can be further improved. In addition, the inner peripheral back surface side inclined surface 237 is not limited to a flat surface, and may be a curved surface.

Next, another embodiment of the present invention will be described with reference to the drawings.
FIG. 4 is an exploded schematic view showing a toilet seat unit according to another embodiment of the present invention.
4 corresponds to a schematic cross-sectional view when the toilet seat unit is disassembled in the section AA shown in FIG.

  In the toilet seat surface member 100a of the present embodiment, an inner peripheral inclined surface 138 is formed at the tip of the inner peripheral protrusion 130. The dimension of the inner peripheral inclined surface 138 shown in FIG. 4 is larger than the dimension of the inner peripheral inclined surface 137 described above with reference to FIG. For example, as illustrated in FIG. 4, the tip surface 135 as illustrated in FIG. 2 may be hardly formed on the inner peripheral protrusion 130 of the present embodiment. Further, the inner peripheral inclined surface 138 is not limited to a flat surface, and may be a curved surface. The other structure of the toilet seat surface member 100a is the same as the structure of the toilet seat surface member 100 described above with reference to FIGS. The toilet seat back member 200 is as described above with reference to FIGS.

FIG. 5 is a schematic cross-sectional view illustrating an example of the manufacturing process of the toilet seat unit according to this embodiment.
First, the manufacturing process shown in FIGS. 5A and 5B is the same as the manufacturing process of the toilet seat unit described above with reference to FIGS. 3A and 3B.

  Subsequently, as shown in FIG. 5C, the toilet seat surface until the inner peripheral side stepped portion (stopper portion) 111 of the toilet seat surface member 100 comes into contact with the upper end portion 211 on the surface side of the inner peripheral surface side protruding portion 210. When the member 100 is pushed toward the toilet seat back surface member 200, the adhesive 300 causes the gap S3 between the inner peripheral side protrusion 130 and the inner peripheral back surface protrusion 220, specifically, the bottom surface 235 of the inner peripheral recess 230. To an area over the upper portion of the back side wall 233. Then, the toilet seat surface member 100 and the toilet seat back surface member 200 are joined by the adhesive 300 present in the gap S3.

  At this time, since the inner peripheral side inclined surface 138 having a size larger than the size of the inner peripheral side inclined surface 137 described above with reference to FIG. Compared to the case of the toilet seat surface member 100, in the case of the toilet seat surface member 100a of the present embodiment, the adhesive 300 tends to flow in the vicinity of the inner peripheral inclined surface 138. Therefore, the adhesive 300 is likely to spread from the bottom surface 235 of the inner peripheral recess 230 to the region extending from the upper surface of the back side wall 233. Thereby, the assembly property of the toilet seat unit 10 can further be improved. Further, with respect to other effects, the same effects as those described above with reference to FIG. 3 can be obtained.

  FIG. 6 is an exploded schematic view showing a toilet seat unit according to still another embodiment of the present invention. 6 corresponds to a schematic cross-sectional view when the toilet seat unit is disassembled in the cut plane AA shown in FIG.

  The toilet seat back surface member 200a of the present embodiment has an inner peripheral side wraparound prevention rib 291 provided on the bottom surface 235 of the inner peripheral side recess 230 and an outer peripheral side recess relative to the toilet seat back surface member 200 described above with reference to FIGS. And an outer peripheral side wraparound prevention rib 293 provided on the bottom surface 275 of the 270. As shown in FIG. 6, the inner peripheral side anti-rotation rib 291 and the outer peripheral side anti-rotation rib 293 are directed from the bottom surface 235 of the inner peripheral recess portion 230 and the bottom surface 275 of the outer peripheral recess portion 270 toward the toilet seat surface member 100. It protrudes. The other structure of the toilet seat back member 200a is the same as the structure of the toilet seat back member 200 described above with reference to FIGS. The toilet seat surface member 100 is as described above with reference to FIGS.

FIG. 7 is a schematic cross-sectional view illustrating an example of the manufacturing process of the toilet seat unit according to this embodiment.
First, the manufacturing process shown in FIG. 7A is the same as the manufacturing process of the toilet seat unit described above with reference to FIG.

  Subsequently, as illustrated in FIG. 7B, the inner peripheral protrusion 130 of the toilet seat surface member 100 and the inner peripheral recess 230 of the toilet seat back member 200 are engaged. Then, as described above with reference to FIG. 3B, at least a part of the surface side wall 131 of the inner peripheral side protruding portion 130 contacts the surface side side wall 231 of the inner peripheral side recess 230. Further, the adhesive 300 tends to spread between the inner peripheral side protruding portion 130 and the inner peripheral rear surface side protruding portion 220. At this time, a roundabout prevention rib 291 that protrudes from the bottom surface 235 toward the toilet seat surface member 100 is formed on the bottom surface 235 of the inner circumferential recess 230. Therefore, the adhesive 300 is suppressed from spreading to the inner peripheral side with respect to the wraparound prevention rib 291. Therefore, it is possible to further suppress the adhesive 300 from protruding from the space between the surface side wall 131 of the inner peripheral side protruding portion 130 and the surface side side wall 231 of the inner peripheral side recess 230 to the inner peripheral side. Further, with respect to other effects, the same effects as those described above with reference to FIG. 3 can be obtained.

  FIG. 8 is an exploded schematic view showing a toilet seat unit according to still another embodiment of the present invention. 8 corresponds to a schematic cross-sectional view when the toilet seat unit is disassembled in the cut plane AA shown in FIG.

  In this embodiment, the inner peripheral side groove part (1st groove part) 113 is provided in the inner peripheral side step part 111 of the toilet seat surface member 100b. The inner peripheral side step portion 111 is provided on the surface side of the inner peripheral side protruding portion 130. As shown in FIG. 8, the inner peripheral groove 113 is formed upward from the outer peripheral corner of the inner peripheral step 111 of the toilet seat surface member 100b. Moreover, the outer peripheral side groove part (1st groove part) 153 is provided in the outer peripheral side step part 151 of the toilet seat surface member 100b. The outer peripheral side step portion 151 is provided on the surface side of the outer peripheral side protruding portion 170. As shown in FIG. 8, the outer peripheral groove 153 is formed upward from the inner peripheral corner of the outer peripheral step 151 of the toilet seat surface member 100b. The other structure of the toilet seat surface member 100b is the same as the structure of the toilet seat surface member 100 described above with reference to FIGS. The toilet seat back member 200 is as described above with reference to FIGS.

  According to the present embodiment, even when the adhesive 300 enters the gap between the front surface side wall 131 of the inner peripheral protrusion 130 and the front surface side wall 231 of the inner peripheral recess 230, the inner peripheral groove portion. 113 can accommodate at least a part of the adhesive 300. Therefore, it is possible to further suppress the adhesive 300 from protruding from the space between the surface side wall 131 of the inner peripheral side protruding portion 130 and the surface side side wall 231 of the inner peripheral side recess 230 to the inner peripheral side. The same applies to the outer peripheral groove 153. Further, with respect to other effects, the same effects as those described above with reference to FIG. 3 can be obtained.

  FIG. 9 is an exploded schematic view showing a toilet seat unit according to still another embodiment of the present invention. 9 corresponds to a schematic cross-sectional view when the toilet seat unit is disassembled in the cut plane AA shown in FIG.

  In the present embodiment, an inner peripheral groove (second groove) 239 is provided on the bottom surface 235 of the inner peripheral recess 230 of the toilet seat back surface member 200b. As shown in FIG. 9, the inner circumferential groove 239 is formed downward from the inner circumferential side of the bottom surface 235 of the inner circumferential recess 230. In addition, an outer peripheral groove (second groove) 279 is provided on the bottom surface 275 of the outer peripheral recess 270 of the toilet seat back member 200b. As shown in FIG. 9, the outer circumferential groove 279 is formed downward from the outer circumferential side of the bottom surface 275 of the outer circumferential recess 270. The other structure of the toilet seat back member 200b is the same as the structure of the toilet seat back member 200 described above with reference to FIGS. The toilet seat surface member 100 is as described above with reference to FIGS.

  According to the present embodiment, even if the adhesive 300 tries to enter the gap between the surface side wall 131 of the inner peripheral side protruding portion 130 and the surface side side wall 231 of the inner peripheral side concave portion 230, the inner peripheral side groove portion. 239 can store at least a part of the adhesive 300. Therefore, it is possible to further suppress the adhesive 300 from protruding from between the front surface side wall 131 of the inner peripheral protrusion 130 and the front surface side wall 231 of the inner peripheral recess 230 to the inner peripheral side. The same applies to the outer peripheral groove 279. Further, the inner circumferential groove 113 and the outer circumferential groove 153 described above with reference to FIG. 8, and the inner circumferential groove 239 and the outer circumferential groove 279 illustrated in FIG. 9 may be provided. According to this, it can suppress further that an adhesive protrudes. Further, with respect to other effects, the same effects as those described above with reference to FIG. 3 can be obtained.

The embodiment of the present invention has been described. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, dimensions, material, arrangement, etc. of each element included in the toilet seat front surface member 100 and the toilet seat back surface member 200 and the installation form of the inner peripheral protrusion rib 240 and the outer protrusion rib 280 are exemplified. It is not necessarily limited and can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 10 Toilet seat unit, 100, 100a, 100b Toilet seat surface member, 101 Seating surface, 110 1st inner peripheral part, 111 Inner peripheral side step part, 113 Inner peripheral side groove part, 130 Inner peripheral side protrusion part, 131 Surface side wall, 133 Back side wall, 135 Front end surface, 137, 138 Inner peripheral side inclined surface, 150 First outer peripheral part, 151 Outer peripheral side step part, 153 Outer peripheral side groove part, 170 Outer peripheral side protruding part, 173 Back side side wall, 200, 200a , 200b Toilet seat rear surface member, 201 Second inner peripheral portion, 203 Second outer peripheral portion, 210 Inner peripheral surface side protruding portion, 211 Upper end portion, 220 Inner peripheral rear surface side protruding portion, 230 Inner peripheral side concave portion, 231 Surface side Side wall, 233 Back side wall, 235 Bottom surface, 239 Inner peripheral side groove, 240 Inner peripheral side protruding rib, 250 Outer peripheral surface side protruding part, 260 Outer peripheral back side Projection, 270 outer peripheral recess, 271 surface side wall, 273 back side wall, 275 bottom surface, 279 outer groove, 280 outer protrusion rib, 291 and 293 wraparound prevention rib, 300 adhesive

Claims (5)

A toilet seat surface member;
A toilet seat back member;
With
Either one of the toilet seat surface member and the toilet seat back member has an annular protrusion provided on the inner peripheral side and the outer peripheral side, respectively.
Either one of the toilet seat surface member and the toilet seat back surface member has annular recesses that are provided on the inner peripheral side and the outer peripheral side, respectively, and can be engaged with the protrusions,
Protruding ribs are provided on at least one of the side wall on the back surface side of the protruding portion and the side wall on the back surface side of the recess,
In a state where the protrusion and the recess are engaged, the protrusion is pushed to the surface side by the protruding rib, and at least a part of the surface side wall of the protrusion is a side wall on the surface side of the recess. The toilet seat unit, wherein the toilet seat surface member and the toilet seat back member are joined together by an adhesive interposed between the protrusion and the recess.   The toilet seat unit according to claim 1, wherein an inclined surface that gradually recedes from the front surface side toward the back surface side is formed at a tip of the protruding portion.   The toilet seat unit according to claim 1, wherein a wraparound prevention rib protruding toward the protruding portion is provided on a bottom surface of the recess. The one of the toilet seat surface member and the toilet seat back member is provided on the surface side of the protruding portion, and can be in contact with the surface side of the other concave portion of the toilet seat surface member and the toilet seat back member. Having a stopper,
The toilet seat unit according to any one of claims 1 to 3, wherein a first groove part capable of accommodating at least a part of the adhesive is formed in the stopper part.   The toilet seat unit according to any one of claims 1 to 4, wherein a second groove that can store at least a part of the adhesive is formed on a bottom surface of the recess.

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