Toilet seat, toilet device, and method for manufacturing toilet seat

Abstract

The present invention provides a toilet seat having a practical configuration in which wiring is drawn out to the outside, a toilet device, and a method for manufacturing the toilet seat.　A toilet seat (10) of the disclosure comprises: a seat front part (11) having a surface sheet (11A) (surface member) made of synthetic resin, and a heat-generating member (11C) (power supplied part) that is embedded in the surface sheet (11A) and to which power is supplied from the outside; and a seat back part (12) made of synthetic resin that is fixed to the back surface of the seat front part (11) and has a hinge part (10B). A wiring part (13) for supplying power from the outside to the heat-generating member (11C) is embedded in the hinge part (10B).

Description

Toilet seat, toilet device, and method for manufacturing toilet seat

[0001] The present disclosure relates to a toilet seat, a toilet device, and a method for manufacturing a toilet seat.

[0002] Patent Document 1 discloses a technique for manufacturing a toilet seat, in which a structure where a heat generating member (power-supplied member) is sandwiched between a surface sheet and a fiber sheet is placed in an injection molding mold and insert-molded.

[0003] Japanese Unexamined Patent Application Publication No. 2021-083824

[0004] In the arrangement of Patent Document 1, the wiring of the heat generating member is led out outward from the toilet seat. The posture of the toilet seat changes between an upright state and a laid-down state. For this reason, it is necessary to take into account the posture change of the toilet seat when arranging the wiring led out to the outside. However, Patent Document 1 does not disclose how to handle the wiring led out to the outside.

[0005] The present disclosure has been completed based on the above circumstances, and an object thereof is to provide a toilet seat having a practical configuration in which wiring is led out to the outside, a toilet device, and a method for manufacturing a toilet seat.

[0006] The toilet seat according to the first disclosure comprises: a seat surface portion having a surface member and a power-supplied member provided on the surface member and supplied with electric power from the outside; and a seat back portion fixed to the back surface of the seat surface portion and having a hinge portion, wherein a wiring portion for supplying electric power from the outside to the power-supplied member is embedded in the hinge portion.

[0007] The toilet device according to the second disclosure comprises: the toilet seat according to the first disclosure; and a toilet body on which the toilet seat is placed.

[0008] The method for manufacturing a toilet seat according to the third disclosure is a method for manufacturing the toilet seat according to the first disclosure, wherein an assembly in which the wiring portion is connected to the seat surface portion is arranged at a predetermined position in a mold, and a synthetic resin constituting the seat back portion is caused to flow into the mold.

[0009] 3. Plan view showing the toilet seat in Embodiment 1 Cross-sectional view taken along arrow A-A in Figure 1 Bottom view showing the wiring section and seat surface Enlarged perspective view of the main part showing the wiring section and seat surface Schematic cross-sectional view showing the intermediate body being placed between the female and male molds of a press machine Schematic cross-sectional view showing the intermediate body being pressed by the female and male molds of a press machine Schematic cross-sectional view showing synthetic resin being poured into the mold of an injection molding machine in which the seat surface is placed Enlarged bottom view of the main part showing the seat surface and wiring section being placed in the female mold of an injection molding machine Schematic cross-sectional view showing the toilet seat being removed from the female mold of an injection molding machine Partially enlarged plan view showing the toilet seat in Embodiment 2 Partially enlarged perspective view showing the toilet seat in Embodiment 2 Partially enlarged perspective view showing the seat surface and wiring section in Embodiment 2 Enlarged bottom view of the main part showing the seat surface and wiring section of Embodiment 2 being placed inside the female mold of an injection molding machine Partially enlarged perspective view showing the toilet seat in Embodiment 3 Partially enlarged perspective view showing the seat surface and wiring section in Embodiment 3

[0010] First, embodiments of this disclosure will be listed and described. Any combination of the following embodiments, without causing any inconsistency, is also included as a form for carrying out the invention.

[0011] The toilet seat of the first disclosure comprises: [1] a seat surface having a surface member and a power supply portion provided on the surface member to which power is supplied from the outside; and a seat back portion fixed to the back surface of the seat surface having a hinge portion, wherein a wiring portion for supplying power to the power supply portion from the outside is embedded in the hinge portion. With this configuration, since the wiring is embedded in the hinge portion, there is no need to route the wiring in the hinge portion, and the power supply portion is easy to insert mold.

[0012] [2] In the toilet seat described in [1] above, the wiring section includes wiring connected to the power supply section and a holding member that holds the wiring in a predetermined position within the hinge section. With this configuration, when insert molding is performed, the holding member can hold the wiring well within the mold used to form the hinge section.

[0013] [3] In the toilet seat described in [2] above, the retaining member is a connector and is located within the hinge portion. With this configuration, there is no need to pull the wiring out from the hinge portion, making it easy to handle.

[0014] [4] In the toilet seat described in [2] above, the retaining member is hollow and the wiring is passed through the inside. With this configuration, the wiring is easily held by the retaining member.

[0015] [5] In the toilet seat described in any of [2] to [4] above, the retaining member is positioned on the rotation axis of the hinge portion. This configuration makes it easy to realize a configuration in which wiring can be routed to the outside via the retaining member.

[0016] [6] In the toilet seat described in any of [1] to [5] above, the seat surface and the seat underside are integrally molded. This configuration makes it easy to realize a toilet seat equipped with a power supply unit.

[0017] The toilet device of the second disclosure comprises [7] a toilet seat as described in any of [1] to [6] above, and a toilet bowl on which the toilet seat is placed. With this configuration, since the wiring is embedded in the hinge of the toilet seat, it is possible to make the wiring less conspicuous in the toilet device.

[0018] The third disclosure is a method for manufacturing a toilet seat, which is a method for manufacturing a toilet seat according to any one of [1] to [6] above, wherein the wiring portion connected to the seat surface portion is placed in a predetermined position in the mold, and the synthetic resin constituting the seat back portion is poured into the mold. With this configuration, a configuration in which a power supply portion is provided in the toilet seat can be easily realized.

[0019] [9] The method for manufacturing a toilet seat described in [8] above is to position a retaining member that holds the wiring connected to the power supply unit at a predetermined position within the hinge portion, relative to the seat surface portion. With this configuration, the position of the retaining member can be prevented from shifting when synthetic resin is poured into the mold.

[0020] <Embodiment 1> Hereinafter, the upper side (positive Z-axis direction in Figure 1) of the reclined toilet seat 10 will be referred to as the upper side, the lower side (negative Z-axis direction in Figure 1) as the lower side, the front side (positive X-axis direction in Figure 1) as seen from the perspective of a person seated on the reclined toilet seat 10 as the front side, the rear side (negative X-axis direction in Figure 1) as the rear side, the right side (positive Y-axis direction in Figure 1) as the right side, and the left side (negative Y-axis direction in Figure 1) as the left side.

[0021] As shown in Figure 1, the toilet seat 10 has an annular shape with an open center. A pair of hinge parts 10B are provided at the rear end of the toilet seat 10, spaced apart in the left-right direction. The pair of hinge parts 10B protrude backward. The pair of hinge parts 10B are connected to the shaft of the device body (not shown). The toilet seat 10 rotates around the shaft of the device body to change between a reclined position along the upper surface of the toilet bowl body 20 (see Figure 2) and an upright position tilted slightly backward toward the top of the toilet bowl body 20. The toilet seat 10, together with the toilet bowl body 20, constitutes the toilet device 1 (see Figure 2). In other words, the toilet device 1 comprises the toilet seat 10 and the toilet bowl body 20.

[0022] Multiple legs 10C are provided on the underside (bottom surface in the reclined position) of the toilet seat 10. The legs 10C protrude from the underside of the toilet seat 10. A gate mark is located on one of the legs 10C, which will be used when injection molding the seat back portion 12, described later. A cap member 10D is attached to the protruding end (bottom end in the reclined position) of the leg 10C (see Figure 2). By attaching the cap member 10D to the leg 10C, the gate mark is hidden.

[0023] As shown in Figure 2, a toilet seat 10 of this shape comprises a seat surface 11, a seat underside 12 made of synthetic resin, and a wiring section 13 (see Figures 3 and 4).

[0024] [Composition of the seat surface] The seat surface 11 constitutes the upper surface of the toilet seat 10 in a reclined position. The seat surface 11 is ring-shaped so as to cover almost the entire upper surface of the toilet seat 10.

[0025] The seat surface portion 11 includes a surface sheet 11A, which is a surface member, a fiber sheet 11B, and a heating element 11C, which is a power supply portion. The surface sheet 11A is made of a thin, sheet-like synthetic resin. The surface sheet 11A is not limited to synthetic resin; various sheet-like materials such as synthetic leather, wooden sheets, and metal sheets can be used.

[0026] The fiber sheet 11B is fixed to the back surface of the surface sheet 11A. The fiber sheet 11B has gaps between the fibers of a nonwoven fabric or similar material that allow molten synthetic resin to permeate. The fiber sheet 11B forms an annular shape that extends almost the entire back surface of the surface sheet 11A. The fiber sheet 11B is attached to the back surface of the surface sheet 11A with an adhesive (not shown).

[0027] The heating element 11C is a linear heater that generates heat when power is supplied from an external source. For example, a sheathed heater is used for the heating element 11C. The heating element 11C is attached to one surface of the fiber sheet 11B in a meandering manner (see Figure 1). Both ends of the heating element 11C penetrate the fiber sheet 11B at the rear end of the fiber sheet 11B and are pulled out to the other side of the fiber sheet 11B (see Figure 3). The meandering portion of the heating element 11C is sandwiched between the surface sheet 11A and the fiber sheet 11B.

[0028] [Structure of the underside of the seat] The underside of the seat 12 constitutes the underside of the toilet seat 10 when it is in a reclined position. The underside of the seat 12 is fixed to the back surface of the seat surface 11 by molten synthetic resin seeping into the gaps between the fibers in the fiber sheet 11B from the other side of the fiber sheet 11B. A thermoplastic resin such as polypropylene, which is a synthetic resin, is used for the underside of the seat 12. As shown in Figure 1, the underside of the seat 12 integrally has an annular main body 12A, a pair of hinge parts 10B that protrude backward from the rear end of the main body 12A, and a plurality of leg parts 10C. The center of the main body 12A is open. The main body 12A is annular in shape along the back surface of the seat surface 11 (see Figure 2). The thickness dimension of the main body 12A (vertical dimension in the reclined position) is greater than the thickness dimension of the seat surface 11 (see Figure 2).

[0029] [Wiring section configuration] The wiring section 13 includes wiring 13A and a holding member 13B. A known insulated wire is used for the wiring 13A. One wiring 13A is connected to each end of the heating element 11C that is pulled out to the other side of the fiber sheet 11B (see Figures 3 and 4). The wiring 13A supplies power to the heating element 11C from the outside.

[0030] The retaining member 13B is made of synthetic resin. As shown in Figures 3 and 4, the retaining member 13B has a block-shaped retaining member body 13E and a cylindrical tube portion 13F that protrudes from the retaining member body 13E. A through hole 13G is formed in the retaining member body 13E so as to connect to the tube portion 13F (see Figure 3). In other words, the retaining member 13B is hollow. The wiring 13A is passed through the through hole 13G and the inside of the tube portion 13F of the retaining member 13B (see Figure 3). Both ends of the wiring 13A are extended from the retaining member 13B. The wiring portion 13 is embedded inside at least one of the pair of hinge portions 10B in the seat base portion 12 (see Figure 1). The wiring 13A is pulled out to the outside from the part of the hinge portion 10B into which the shaft portion of the device body is fitted (see Figure 1).

[0031] [An example of a toilet seat manufacturing method] An example of a method for manufacturing a toilet seat 10 is described below. The method for manufacturing the toilet seat 10 includes a first step of forming the seat surface portion 11, and a second step of forming the seat back portion 12 on the seat surface portion 11 formed in the first step.

[0032] First, as shown in Figure 5, an intermediate body 30 is prepared, which has a surface sheet 11A, a fiber sheet 11B, and a heating element 11C. Initially, the heating element 11C is attached to one side of the fiber sheet 11B using adhesive in a meandering manner (see Figure 3). At this time, both ends of the heating element 11C are pulled out to the other side of the fiber sheet 11B (see Figure 3). Then, the fiber sheet 11B is attached to the surface sheet 11A with adhesive. The fiber sheet 11B is placed with the side to which the heating element 11C is attached facing the surface sheet 11A. The heating element 11C is sandwiched between the surface sheet 11A and the fiber sheet 11B. The process of attaching the surface sheet 11A and the fiber sheet 11B is easy because it is done in a flat state. In this way, the intermediate body 30 is formed.

[0033] Next, the first step is performed. As shown in Figures 5 and 6, a press machine 50 is used in the first step. Specifically, the intermediate body 30 is placed on the female die 51 of the press machine 50. At this time, the surface sheet 11A is positioned facing the female die 51.

[0034] Next, the male die (movable side) 52 of the press machine 50 is moved toward the female die 51. For example, at least one of the male die 52 and the female die 51 has a built-in heater to heat the intermediate body 30. The male die 52 and the female die 51 close while heating the intermediate body 30. As a result, the surface sheet 11A of the intermediate body 30 softens due to the heating and deforms into a shape that conforms to the male die 52 and the female die 51 (see Figure 6). At this time, the heating element 11C is slightly embedded in the surface sheet 11A that has been softened by the heating (see Figure 6). In this way, the intermediate body 30 is formed into a curved shape that follows the shape of the male die 52 and the female die 51 and transforms into a seat surface portion 11. Then, the formed seat surface portion 11 is removed from the press machine 50, and the opening edge formed around the perimeter and in the center of the seat surface portion 11 is trimmed using a laser cutter or cutting die. In this way, the seat surface portion 11 is formed (see Figure 3).

[0035] Next, one wire 13A is connected to each end of the heating element 11C that is extended to the other side of the fiber sheet 11B (see Figures 3 and 4). Specifically, the wires 13A extending from the main body 13E of the holding member 13B are connected to each end of the heating element 11C (see Figures 3 and 4).

[0036] Next, the second step is performed. An injection molding machine 53 is used in the second step. Specifically, as shown in Figure 7, the seat surface portion 11 molded in the first step is placed in a predetermined position within the mold 54. At this time, the seat surface portion 11 is placed in the female mold 56 with the fiber sheet 11B facing the male mold 55 side. The gate 57 of the mold 54 is set to be located at a position that forms the leg portion 10C of the seat back portion 12 of the seat surface portion 11.

[0037] Then, as shown in Figure 8, the retaining member 13B is placed in the space C that forms the hinge portion 10B in the mold 54. The mold 54 has a fitting recess 58 into which the wiring 13A is fitted. Near the space C, a series of fitting recesses 58 for fitting the cylindrical portion 13F and the wiring 13A extending from the cylindrical portion 13F are carved out. By fitting the cylindrical portion 13F and the wiring 13A extending from the cylindrical portion 13F into the fitting recesses 58, the wiring portion 13 is held in a predetermined position (space C) within the mold 54. In this way, the retaining member 13B is positioned within the mold 54 so that its relative position to the seat surface portion 11 is determined. A cover 59 may be attached to the protruding end of the wiring 13A extending from the cylindrical portion 13F to make it easier to fasten the wiring 13A into the fitting recess 58.

[0038] Then, as shown in Figure 7, the male mold 55 and the female mold 56 are closed, and the molten synthetic resin is allowed to flow into the space inside the mold 54. The molten synthetic resin flows into the space inside the mold 54 through the gate 57 and spreads along the upper surface of the fiber sheet 11B. The molten synthetic resin permeates into the gaps between each fiber of the fiber sheet 11B and spreads over the entire other side surface of the fiber sheet 11B. As a result, the seat back portion 12 is firmly fixed to the seat front portion 11. Thus, in the second step, the seat front portion 11 with the wiring portion 13 connected is placed in a predetermined position inside the mold 54, and the synthetic resin constituting the seat back portion 12 is allowed to flow into the mold 54 to integrally mold the seat front portion 11 and the seat back portion 12.

[0039] Then, the molten synthetic resin flows into space C (see Figure 8). In space C, the molten synthetic resin fills the space so as to cover the outer surface of the retaining member body 13E of the retaining member 13B. In this way, the wiring portion 13 is embedded in the hinge portion 10B. Since the cylindrical portion 13F and the wiring 13A extending from the cylindrical portion 13F are fitted into the fitting recess 58, the molten synthetic resin does not flow into it. Therefore, the cylindrical portion 13F and the wiring 13A extending from the cylindrical portion 13F are not covered by the molten synthetic resin. Also, the molten synthetic resin does not flow into the inside of the retaining member 13B (the through hole 13G through which the wiring 13A is inserted and the inside of the cylindrical portion 13F). For example, a filling member is attached to the open end of the through hole 13G to fill the gap between the wiring 13A and the through hole 13G. Alternatively, the filling member may be pushed to the back of the through hole 13G so that the synthetic resin flows into a part of the through hole 13G. In other words, the retaining member 13B may be provided with a portion into which synthetic resin flows and a portion into which it does not. In this way, the retaining member 13B holds the wiring 13A in a predetermined position within the hinge portion 10B.

[0040] The mold 54 molds the seat back portion 12 into a shape having a main body portion 12A, a pair of hinge portions 10B, and leg portions 10C (see Figure 1). The outer surface of the seat back portion 12 is molded flush with the outer surface of the seat top portion 11 without any steps (see Figure 2). After the molten synthetic resin cools and solidifies, the toilet seat 10, formed by fixing the seat back portion 12 to the seat top portion 11, is removed from the mold 54 as shown in Figure 9. Then, the sprue is cut at the cutting position G, and cap members 10D are attached to each leg portion 10C (see Figure 2). The toilet seat 10 removed from the mold 54 has a cylindrical portion 13F and wiring 13A extending from the cylindrical portion 13F protruding from one of the pair of hinge portions 10B (see Figure 1). Thus, the manufacturing of the toilet seat 10 is completed. The cylindrical portion 13F of the retaining member 13B is arranged coaxially on the rotation axis R of the hinge portion 10B (see Figure 1).

[0041] The operation and effects of the embodiment configured as described above will now be explained. The toilet seat 10 comprises a seat surface portion 11 having a surface sheet 11A (surface member) made of synthetic resin and a heating element 11C (power supply portion) embedded in the surface sheet 11A and supplied with power from the outside, and a seat back portion 12 made of synthetic resin fixed to the back surface portion 11 and having a hinge portion 10B. A wiring portion 13 for supplying power to the heating element 11C from the outside is embedded in the hinge portion 10B. With this configuration, since the wiring portion 13 is embedded in the hinge portion 10B, there is no need to route the wiring portion 13 in the hinge portion 10B, making it easier to manufacture the toilet seat 10.

[0042] The wiring section 13 includes a wiring 13A connected to the heating element 11C, and a holding member 13B that holds the wiring 13A in a predetermined position within the hinge section 10B. With this configuration, when insert molding is performed, the holding member 13B makes it possible to securely hold the wiring 13A in a predetermined position within the mold 54 that forms the hinge section 10B.

[0043] The retaining member 13B is hollow, and the wiring 13A is passed through the inside. With this configuration, the retaining member 13B can easily hold the wiring 13A.

[0044] The holding member 13B is coaxially arranged on the rotation axis R of the hinge part 10B. According to this configuration, a configuration in which the wiring 13A is led out to the outside via the holding member 13B can be easily realized.

[0045] The front seat part 11 and the back seat part 12 are integrally formed by insert molding. According to this configuration, a configuration in which the heating member 11C is provided on the toilet seat 10 can be easily realized.

[0046] The toilet device 1 includes a toilet seat 10 and a toilet body 20 on which the toilet seat 10 is placed. According to this configuration, since the wiring 13A is embedded in the hinge part 10B of the toilet seat 10, a configuration that makes the wiring 13A less noticeable in the toilet device 1 can be achieved.

[0047] A method for manufacturing a toilet seat includes arranging a wiring part 13 connected to a front seat part 11 at a predetermined position in a mold 54, and allowing a synthetic resin constituting a back seat part 12 to flow into the mold 54. According to this configuration, a configuration in which the heating member 11C is provided on the toilet seat 10 can be easily realized.

[0048] In the method for manufacturing a toilet seat, the holding member 13B that holds the wiring 13A connected to the heating member 11C at a predetermined position in the hinge part 10B is arranged such that its relative position with respect to the front seat part 11 is determined. According to this configuration, the position of the holding member 13B can be prevented from shifting when the synthetic resin flows into the mold 54.

[0049] <Embodiment 2> The toilet seat 110 according to Embodiment 2 will be described with reference to Figures 10 to 13. The toilet seat 110 of Embodiment 2 is different from Embodiment 1 in the form of the wiring part 113. In the following description, the same reference numerals are used for configurations that are the same as those in Embodiment 1, and repeated descriptions are omitted.

[0050] As shown in Figure 10, the toilet seat 110 includes a front seat part 11, a synthetic resin back seat part 112, and a wiring part 113.

[0051] The seat base portion 112 integrally comprises an annular main body portion 12A, a pair of hinge portions 110B protruding rearward from the rear end of the main body portion 12A, and a plurality of legs (not shown). As shown in Figure 11, one of the pair of hinge portions 110B has a recess 112D formed in the upper surface, recessed downward. Furthermore, the hinge portion 110B with the recess 112D has a fitting hole 112E into which the shaft portion of the device body (not shown) fits.

[0052] As shown in Figure 12, the wiring section 113 has wiring 13A and a retaining member 113B. The retaining member 113B is made of synthetic resin and has a block-shaped retaining member body 113E and a conductive metal terminal fitting 113H protruding from one surface of the retaining member body 113E. The retaining member 113B is a connector that mates with a mating connector (not shown). One end of the wiring 13A is connected to the terminal fitting 113H inside the retaining member body 113E (not shown). As shown in Figures 10 and 11, the wiring section 113 is embedded in one of a pair of hinge portions 110B in the seat base portion 112. Specifically, the wiring section 113 is located inside the recess 112D (i.e., inside the hinge portion 110B). The retaining member 113B is embedded in the hinge portion 110B such that a part of the retaining member body 113E and the terminal fitting 113H are exposed within the recess 112D.

[0053] An example of a method for manufacturing the toilet seat 110 will be described. As shown in Figure 13, a heating element 11C, which is drawn out from the seat surface 11, has wiring 13A connected to each of its ends, and is placed in a predetermined position in the mold 154. Then, the retaining member 113B is placed in the space C2 in the mold 154 that forms the hinge portion 110B. A recess 158 is carved into the space C2 into which a part of the retaining member body 113E and a terminal fitting 113H extending from the retaining member body 113E are fitted. By fitting a part of the retaining member body 113E and the terminal fitting 113H into the recess 158, the wiring portion 113 is held in a predetermined position in the mold 154.

[0054] Then, the male and female molds are closed, and the molten synthetic resin flows into the space within the mold 154. When the molten synthetic resin flows into space C2, it fills the space C2 so as to cover the outer surface of the retaining member body 113E, except for the surface on which the terminal fitting 113H protrudes and its peripheral edge. Since a part of the retaining member body 113E and the terminal fitting 113H are fitted into the fitting recess 158, the molten synthetic resin does not flow into it. Therefore, the surface of the retaining member body 113E on which the terminal fitting 113H protrudes and its peripheral edge, as well as the terminal fitting 113H, are not covered by the molten synthetic resin.

[0055] After the molten synthetic resin cools and solidifies, the toilet seat 110 (see Figures 10 and 11) is formed by fixing the seat surface portion 11 to the seat back portion 112 and then removed from the mold 154. The sprue is then cut at the cutting position and the cap members are attached to the legs. When the toilet seat 110 is removed from the mold 154, a part of the retaining member body 113E and the terminal fitting 113H are exposed in a recess 112D formed in one of the pair of hinge portions 110B (see Figures 10 and 11). In this way, the manufacturing of the toilet seat 110 is completed.

[0056] For example, within the recess 112D, a mating connector (not shown) is connected to the retaining member body 113E, and the wires extending from the mating connector are pulled out through the fitting hole 112E. Then, the cover member 112F is attached to the hinge portion 110B so as to cover the recess 112D (see Figure 11).

[0057] The retaining member 113B is a connector that mates with the mating connector and is located within the hinge portion 110B. With this configuration, there is no need to pull the wiring 13A out of the hinge portion 110B, making it easy to handle.

[0058] <Embodiment 3> The toilet seat 210 according to Embodiment 3 will be described with reference to Figures 14 and 15. The toilet seat 210 of Embodiment 3 differs from that of Embodiment 2 in the shape of the wiring section 213. In the following description, the same reference numerals are used for components similar to those in Embodiments 1 and 2, and redundant explanations are omitted.

[0059] As shown in Figure 14, the toilet seat 210 comprises a seat surface portion 11, a seat underside portion 112 made of synthetic resin, and a wiring portion 213.

[0060] As shown in Figure 15, the wiring section 213 has a wire 13A and a retaining member 213B. The retaining member 213B is made of synthetic resin and is block-shaped. The wire 13A is embedded in the retaining member 213B such that both ends extend from the retaining member 213B. As shown in Figure 14, the wiring section 213 is positioned in a recess 112D formed in one of the hinge sections 110B. The wiring section 213 is embedded in the hinge section 110B such that a part of the retaining member 213B and a part of the wire 13A extending from the retaining member 213B are exposed. Then, a part of the wire 13A extending from the retaining member 213B is pulled out from the fitting hole 112E. Then, the cover member 112F is attached to the hinge section 110B so as to cover the recess 112D. Note that a connector may be provided at the end of the wire 13A exposed in the recess 112D.

[0061] <Other Embodiments> This disclosure is not limited to the embodiments described above and drawn, and the following embodiments are also included in the technical scope of this disclosure. (1) Unlike the above embodiments, a seat sensor, thermocouple, display unit, etc. may be provided on the seat surface as a power supply unit. In this case, the number of wires will increase or decrease according to the number of power supply units provided on the seat surface. (2) Unlike the above embodiments, a configuration without a fiber sheet may be used. In this case, a heat-generating member in a meandering state is attached to the surface sheet using an adhesive and then press-molded. The surface sheet is heated and softened during press molding, and the heat-generating member is embedded in the surface sheet. In this case, it is conceivable to firmly fix the seat back by applying a textured finish to the male mold and forming a matte finish on the surface of the surface sheet on the male mold side. Alternatively, a curved surface sheet (surface member) that conforms to the shape of the toilet seat surface may be formed by injection molding, a heat-generating member may be attached to the back surface of the surface sheet, and then the surface sheet may be placed in the mold for molding the toilet seat. In this case, the heating element is not embedded in the surface sheet but is covered by the synthetic resin that constitutes the underside of the seat. In other words, the power supply part may be provided on the surface member. (3) In contrast to the above embodiment, a configuration without a retaining member may be used. In this case, it is necessary to provide a shape for bringing the wiring out to the outside in the space that forms the hinge part in the mold of the injection molding machine. (4) In contrast to the above embodiment, a part that mimics the shape of the hinge part having a fitting hole and a recess may be provided on the seat surface by press molding, and the cylindrical part of the retaining member may be fitted into the fitting hole so that the relative position of the seat surface and the wiring part does not shift. In other words, a configuration in which a part of the hinge part is formed by the seat surface. (5) In contrast to the above embodiment, one hinge part may be provided in the center in the left-right direction at the rear end of the toilet seat. (6) In contrast to the above embodiment, a configuration in which a wiring part is provided on each hinge part may be used. (7) In contrast to the above embodiment, the cylindrical part of the retaining member may be arranged on the rotation axis so as to be inclined with respect to the rotation axis of the hinge part.

[0062] 1: Toilet device, 10, 110, 210: Toilet seat, 10B, 110B: Hinge part, 11: Seat surface part, 11A: Surface sheet (surface member), 11C: Heating element (power supply part), 12, 112: Seat underside part, 13, 113, 213: Wiring part, 13A: Wiring, 13B, 113B, 213B: Holding member, 20: Toilet bowl body, 54, 154: Mold, R: Rotating shaft

Claims

1. A toilet seat comprising: a seat surface having a surface member and a power supply portion provided on the surface member to which power is supplied from the outside; and a seat back portion fixed to the back surface of the seat surface having a hinge portion, wherein a wiring portion for supplying power to the power supply portion from the outside is embedded in the hinge portion.

2. The toilet seat according to claim 1, wherein the wiring section comprises wiring connected to the power supply section and a holding member that holds the wiring in a predetermined position within the hinge section.

3. The toilet seat according to claim 2, wherein the retaining member is a connector and is located within the hinge portion.

4. The toilet seat according to claim 2, wherein the retaining member is hollow and the wiring is passed through the inside.

5. The toilet seat according to claim 2, wherein the retaining member is arranged on the rotation axis of the hinge portion.

6. The toilet seat according to any one of claims 1 to 5, wherein the seat surface and the seat underside are integrally molded.

7. A toilet device comprising: a toilet seat according to any one of claims 1 to 5; and a toilet bowl on which the toilet seat is placed.

8. A method for manufacturing a toilet seat according to any one of claims 1 to 5, wherein the toilet seat is manufactured by connecting the wiring portion to the seat surface portion and placing the connected portion in a predetermined position in a mold, and pouring the synthetic resin constituting the seat underside portion into the mold.

9. The method for manufacturing a toilet seat according to claim 8, wherein a holding member for holding wiring connected to the power supply unit at a predetermined position within the hinge portion is arranged such that its relative position is determined with respect to the seat surface portion.

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