JP2019024933A - Toilet seat device - Google Patents

Abstract

To provide a toilet seat device that comprises a heater for heating a toilet seat, and an electrostatic sensor provided in the toilet seat, and can restrain a user from feeling cold.SOLUTION: A toilet seat device comprises: a hollow toilet seat comprising an inner surface; a heater for heating the toilet seat; a metal film provided on the inner surface of the toilet seat to transfer heat of the heater, and comprising a cutout part provided so that a portion of the inner surface is exposed; an electrostatic sensor comprising a detecting electrode for detecting a user seated on the toilet seat, and a case for covering the detecting electrode; and a bonding body for bonding the portion of the inner surface and the case.SELECTED DRAWING: Figure 1

Description

  Aspects of the invention generally relate to toilet seat devices.

  Conventionally, a toilet seat device having a function of heating the toilet seat has been used. This toilet seat device has a heater provided inside a hollow toilet seat. In addition, a metal film for transmitting heat from the heater to the toilet seat is provided on the inner surface of the toilet seat.

  It is known to provide an electrostatic sensor for detecting the seating of a human body inside the toilet seat of such a toilet seat device (Patent Document 1). An electrostatic sensor has an electrode, and can detect a human body based on the electrostatic capacitance formed when a human body approaches an electrode.

  Further, the electrostatic sensor has a case, and the electrode is housed in the case. Thereby, the electrode can be protected from corrosion due to water droplets or the like. Generally, as a method of fixing the sensor unit to the toilet seat, a method of fixing the case of the sensor unit to the toilet seat using a screw is known (Patent Document 2).

JP 2008-008831 A JP 2003-275137 A

  If a metal film for transmitting the heat of the heater is provided between the electrode of the electrostatic sensor and the user seated on the toilet seat, the detection accuracy of the electrostatic sensor decreases. Therefore, a part of the metal film that exposes part of the inner surface of the toilet seat (hereinafter referred to as “notch part” for convenience) is provided by cutting out a part of the metal film. The case of the electrostatic sensor is fixed to a part of the inner surface of the toilet seat exposed from the metal film by the notch (part not covered by the metal film).

  Further, when the case of the electrostatic sensor is fixed to the inner surface of the toilet seat with a screw, a boss for fixing the screw is provided on the inner surface of the toilet seat. It is difficult to cover a portion where such a boss is provided with a metal film for transferring the heat of the heater. For this reason, when fixing a case with a screw | thread, the part which is not covered with a metal film but exposed on the inner surface of a toilet seat becomes large. That is, when fixing a case with a screw, a notch will become large.

  Since the heat from the heater is difficult to be transmitted to a part of the toilet seat exposed by the notch, the temperature of the part becomes lower than the temperature of the surrounding toilet seat covered with the metal film. And in order to detect a user's seating accurately, an electrostatic sensor is arrange | positioned in the position where a user's skin (thigh etc.) is easy to touch. For this reason, when a notch becomes large, there was a problem that it was easy for a user to feel cold.

  The present invention has been made based on recognition of such a problem, and suppresses a user from feeling cold in a toilet seat device having a heater for heating the toilet seat and an electrostatic sensor provided on the toilet seat. An object of the present invention is to provide a toilet seat device that can be used.

  A first invention is a hollow toilet seat having an inner surface, a heater that heats the toilet seat, and a metal film that is provided on the inner surface of the toilet seat and transmits heat of the heater. An electrostatic sensor comprising: a metal film having a notch provided to expose a portion; a detection electrode for detecting a user seated on the toilet seat; and a case covering the detection electrode; A toilet seat device comprising: an adhesive body that bonds the part of the inner surface to the case.

  According to this toilet seat device, since the case of the electrostatic sensor can be fixed to the inner surface of the toilet seat by an adhesive without using a screw or the like, the cutout portion can be made small. That is, since it is possible to reduce the portion where the heat of the heater is difficult to be transmitted, it is possible to prevent the user from feeling cold.

  A second invention is the toilet seat device according to the first invention, wherein the adhesive body has an elastic body.

  According to this toilet seat device, when the toilet seat is deformed by a load of a human body or the like, the elastic body is deformed following the deformation of the toilet seat. Thereby, even if a toilet seat deform | transforms, an electrostatic sensor can be made hard to remove | deviate from a toilet seat.

  A third invention is the toilet seat apparatus according to the first or second invention, wherein the adhesive is a double-sided tape.

  According to this toilet seat device, since the electrostatic sensor can be fixed to the inner surface of the toilet seat with the double-sided tape, the workability can be improved.

  A fourth invention is a toilet seat device according to any one of the first to third inventions, wherein the electrostatic sensor further includes a shield electrode surrounding the detection electrode.

  According to this toilet seat device, the influence of the metal film on the detection electrode can be suppressed by the shield electrode. Thereby, even when a notch part is made small, it can suppress that the detection accuracy of an electrostatic sensor falls. Moreover, compared with the case where a shield electrode is not provided, since the detection accuracy is not easily lowered even if the metal film and the detection electrode are not accurately aligned, the workability can be improved.

  According to a fifth invention, in any one of the first to fourth inventions, the metal film includes a first metal film part and a second metal film part in contact with the first metal film, The first metal film part is provided around the notch part, and at least a part of the second metal film part is provided between the first metal film part and the notch part. Toilet seat device.

  According to this toilet seat device, after the first metal film portion and the electrostatic sensor are fixed to the inner surface of the toilet seat, the second metal film portion is provided to absorb the displacement of the position of the first metal film portion. Can do. Thereby, the workability at the time of attaching a 1st metal film part can be improved.

  A sixth invention is the toilet seat device according to any one of the first to fifth inventions, wherein an area of the notch is smaller than an area of the case and larger than an area of the detection electrode. It is.

  According to this toilet seat device, it is possible to further suppress the user from feeling cold by making the area of the notch portion smaller than the area of the case. Furthermore, since the area of the notch is larger than the area of the electrode, the electrostatic sensor can be attached so that the metal film and the electrode do not overlap in the direction from the electrostatic sensor toward the toilet seat. Thereby, the fall of the detection accuracy of an electrostatic sensor can be suppressed. Therefore, while suppressing a decrease in detection accuracy of the electrostatic sensor, the notch can be made as small as possible to prevent the user from feeling cold.

  A seventh invention is the toilet seat according to any one of the first to sixth inventions, wherein an area of the adhesive body is the same as or larger than an area of the detection electrode. Device.

  According to this toilet seat device, by disposing an adhesive body between the inner surface of the toilet seat and the detection electrode, it is possible to prevent air having a low dielectric constant from entering between the inner surface of the toilet seat and the detection electrode. Can do. Moreover, it can suppress that a part of detection electrode is covered with a 2nd metal film part. Thereby, the detection accuracy of the electrostatic sensor can be improved.

  According to the aspect of the present invention, in the toilet seat device having the heater for heating the toilet seat and the electrostatic sensor provided in the toilet seat, the toilet seat device capable of suppressing the user from feeling cold is provided. .

It is a top view which illustrates the toilet seat device concerning an embodiment. It is sectional drawing which illustrates the toilet seat apparatus which concerns on embodiment. FIG. 3A and FIG. 3B are a cross-sectional view and a plan view illustrating the toilet seat device according to the embodiment. FIG. 4A and FIG. 4B are diagrams illustrating the circuit configuration of the electrostatic sensor according to the embodiment. FIG. 5A and FIG. 5B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment. FIG. 6A and FIG. 6B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment. FIG. 7A and FIG. 7B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment. FIG. 8A and FIG. 8B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment.

  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 plan view illustrating a toilet seat device according to the embodiment.
FIG. 2 is a cross-sectional view illustrating the toilet seat device according to the embodiment.
FIG. 2 shows a cross section taken along line A1-A1 shown in FIG. FIG. 1 shows the toilet seat device 100 and a part of the interior thereof as seen along the arrow A shown in FIG.
A toilet seat device 100 according to the embodiment is a toilet seat device provided on a toilet bowl (Western-style seated toilet) (not shown). As shown in FIG. 1, the toilet seat apparatus 100 has a toilet seat 10 on which a user is seated. The toilet seat 10 is pivotally supported so that it can be opened and closed with respect to the toilet. The toilet seat 10 is annular. In other words, the toilet seat 10 is provided with an opening 11 disposed on the bowl of the toilet bowl. The material of the toilet seat 10 is a non-metallic material such as resin. For example, a resin such as polypropylene is used as the material for the toilet seat 10.

  As shown in FIG. 2, the toilet seat 10 is hollow and has an inner surface 12. A heater 15, a metal film 17, an electrostatic sensor 30 (a seating sensor), and an adhesive body 40 are provided above the inner surface 12 of the toilet seat 10 (on the side of the seating surface 13 on which a user is seated). Yes.

  The heater 15 heats and warms the toilet seat 10 (sitting surface 13). The heater 15 is provided along the periphery of the opening 11 of the toilet seat 10. When the heater 15 is energized, the toilet seat 10 is warmed. As the heater 15, for example, a tubing heater, a sheathed heater, a halogen heater, a carbon heater, or the like is used. The heater 15 is made of a metal member such as aluminum or copper, for example. Various shapes such as a sheet shape, a wire shape, and a mesh shape can be adopted as the shape of the metal member of the heater 15.

  The metal film 17 is, for example, a metal foil (for example, an aluminum foil) bonded to the upper side of the inner surface 12. The metal film 17 may be composed of a single metal foil or may be composed of a plurality of metal foils. The metal film 17 is located between the heater 15 and the inner surface 12 and is in contact with each of the heater 15 and the inner surface 12. Thereby, the metal film 17 transfers the heat of the heater 15 to the toilet seat 10 (sitting surface 13).

  The electrostatic sensor 30 can detect the seating (and leaving) of the user on the toilet seat 10. The adhesive body 40 is provided between the inner surface 12 and the electrostatic sensor 30 and adheres the electrostatic sensor 30 to the inner surface 12. In other words, the electrostatic sensor 30 is attached to the inner surface 12 by the adhesive body 40.

  More specifically, the metal film 17 is provided with a notch 18 (for example, an opening) provided so that a part 12a of the inner surface 12 is exposed. The adhesive bonds the part 12a of the inner surface 12 and the case of the electrostatic sensor 30 (see FIG. 3). That is, the electrostatic sensor 30 is bonded to the part 12 a of the inner surface 12 exposed by the notch 18 by the adhesive body 40.

  In the present specification, the “notch” refers to a portion of the metal film 17 where a part of the inner surface 12 is exposed. For example, the notch 18 is an opening (hole) provided in the metal film 17 or a cut. The formation method of the notch part 18 is arbitrary, and may not necessarily be formed by notching (cutting out) the metal film 17.

  In the embodiment, the adhesive body (the adhesive body 40 and the adhesive body 41 described later) uses various materials that have adhesiveness or tackiness on at least a part of the surface and can connect two things. be able to. For example, the surface in contact with the part 12a of the inner surface 12 of the adhesive body 40 and the surface in contact with the case of the electrostatic sensor 30 of the adhesive body 40 have adhesiveness or tackiness, respectively. As the adhesive, an adhesive, a pressure-sensitive adhesive, a double-sided tape, or the like can be used. The material of the bonded body is, for example, an acrylic resin and desirably does not contain a metal.

  The adhesive body may have a single layer structure or a multilayer structure. For example, in the case of a double-sided tape, the adhesive may have a base material and two adhesive layers that sandwich the base material. The double-sided tape may be composed only of an adhesive layer.

  The toilet seat apparatus 100 may have a functional unit. The functional part is arranged on the rear part of the toilet bowl. The functional unit has a local cleaning function for cleaning a local part of the human body (for example, “wet”) and a drying function for drying the human body local part. That is, toilet seat device 100 may be a sanitary washing device, for example.

  The functional unit includes a nozzle that discharges cleaning water, a heat exchanger that heats water supplied to the nozzle, a warm air heater, and the like. The toilet seat apparatus 100 includes a control unit 51 (control circuit) that controls operations of the heater 15, the electrostatic sensor 30, the nozzle, the heat exchanger, the hot air heater, and the like. For example, the control unit 51 controls energization of the heater 15 or operates the electrostatic sensor 30 to receive the detection result.

  For example, in a state where the electrostatic sensor 30 detects the seating of the user, the user operates the remote controller or the like to send a signal to the control unit 51, so that the user causes the nozzle to discharge cleaning water. Can do. In the embodiment, the functional unit (nozzle, heat exchanger, hot air heater, etc.) is not necessarily provided.

FIG. 3A and FIG. 3B are a cross-sectional view and a plan view illustrating the toilet seat device according to the embodiment.
FIG. 3A shows an enlarged view of the vicinity of the electrostatic sensor 30 shown in FIG. FIG. 3B is a plan view of the vicinity of the electrostatic sensor 30 along the first direction D1 shown in FIG. The first direction D1 is a direction from the electrostatic sensor 30 toward the toilet seat 10, for example, a direction perpendicular to the inner surface 12 with which the adhesive 40 is in contact. In FIG. 3B, some elements are omitted for easy viewing.

As shown in FIG. 3A, the electrostatic sensor 30 includes a case 31 (protective case), a substrate 32, a detection electrode 33, a shield electrode 34, and a circuit unit 35.
The substrate 32, the detection electrode 33, the shield electrode 34, and the circuit unit 35 are accommodated in the case 31 so as to be covered with the case 31. The case 31 is sealed by potting (not shown) such as resin. In addition, as the material of the case 31, for example, a resin is used.

  The detection electrode 33, the shield electrode 34, and the circuit unit 35 are provided on the substrate 32. The substrate 32 on which the detection electrode 33, the shield electrode 34, and the circuit unit 35 are provided is bonded to the inside of the case 31 by an adhesive body 41.

  The detection electrode 33 is an electrode for detecting a user sitting on the toilet seat 10. As shown in FIG. 3B, the shield electrode 34 is an electrode surrounding the detection electrode 33. The circuit unit 35 includes a constant current circuit, a switching circuit, and the like, and is electrically connected to the detection electrode 33. The circuit unit 35 determines whether the user is seated or separated as the potential of the detection electrode 33 changes. The circuit unit 35 is electrically connected to the control unit 51 and transmits a detection result to the control unit 51.

  As shown in FIG. 3B, in this example, the area of the notch 18 is larger than the area of the case 31 when viewed along the first direction D1. The outer periphery 18e of the notch 18 is provided so as to surround the outer periphery 31e of the case 31 when viewed along the first direction D1. The notch 18 overlaps the case 31, the detection electrode 33, and the shield electrode 34 in the first direction D1. The metal film 17 does not overlap the case 31, the detection electrode 33, and the shield electrode 34 in the first direction D1.

  Further, in this example, the area of the adhesive body 40 is larger than the area of the detection electrode 33 when viewed along the first direction D1. In the embodiment, the area of the adhesive body 40 is the same as the area of the detection electrode 33 or larger than the area of the detection electrode 33 when viewed along the first direction D1. For example, the entire detection electrode 33 overlaps the adhesive body 40 in the first direction D1. The adhesive 40 may be in contact with the metal film 17 or may be separated.

FIG. 4A and FIG. 4B are diagrams illustrating the circuit configuration of the electrostatic sensor according to the embodiment.
An example of the circuit configuration of the electrostatic sensor 30 will be described with reference to FIGS. 4 (a) and 4 (b). FIG. 4A shows a case where the user is not sitting on the toilet seat 10, and FIG. 4B shows a case where the user is sitting on the toilet seat 10.
The electrostatic sensor 30 includes, for example, a constant current source 35a and a reference capacitor 35b. One end of the reference capacitor 35b is connected to the constant current source 35a, and the other end of the reference capacitor 35b is connected to the ground potential. The detection electrode 33 is connected to the constant current source 35a in parallel with the reference capacitor 35b.

  When the user is not sitting on the toilet seat 10, as shown in FIG. 4A, the detection electrode 33 is in an open state, for example.

  When the user sits on the toilet seat 10, the user's thigh, for example, contacts the seating surface 13 immediately above the electrostatic sensor 30. Thereby, the capacitor 60 is formed between the human body (user) and the detection electrode 33. The human body side of the capacitor 60 is connected to the ground potential via a capacitor 61 (capacity of the human body) and a capacitor 62 (capacity of the footwear of the user). Further, the human body side of the capacitor 60 is connected to a ground potential via a capacitor 63 (capacity of a toilet seat or a toilet bowl). The capacitor 63 is in parallel with the capacitors 61 and 62. The shield electrode 34 and the metal film 17 are each connected to the ground potential.

  The constant current source 35a causes a current to flow, and charges are accumulated in the reference capacitor 35b and the detection electrode 33 (capacitor 60). At this time, the voltage generated in the reference capacitor 35b varies depending on whether or not the user is seated. By measuring the voltage of the reference capacitor 35b, it is possible to detect the seating or leaving of the user.

  As described above, the electrostatic sensor 30 utilizes the capacitance formed between the user seated on the toilet seat 10 and the detection electrode 33, and the user's seating is performed based on the amount of electric charge accumulated in the detection electrode 33. Is detected. In this case, if a metal is disposed between the user and the detection electrode 33, the detection accuracy decreases. Therefore, the notch 18 is provided in the metal film 17, and the electrostatic sensor 30 is attached to a part 12 a of the inner surface 12 exposed by the notch 18. Thereby, the fall of the detection accuracy of the electrostatic sensor 30 can be suppressed.

  When the case 31 is fixed to the inner surface 12 of the toilet seat 10 with a screw, a boss for fixing the screw to the inner surface 12 of the toilet seat 10 is provided. A portion where such a boss is provided is difficult to cover with the metal film 17. Therefore, when the case 31 is fixed with screws, the exposed portion of the inner surface 12 that is not covered with the metal film 17, that is, the notch portion 18 becomes large.

  On the other hand, since the heat from the heater 15 is difficult to be transmitted to a part of the toilet seat 10 exposed by the notch portion 18, the temperature of the portion is lower than the temperature of the portion covered with the metal film 17. Further, in order to accurately detect the user's seating, the electrostatic sensor 30 is disposed at a position where the user's skin (such as the thigh) is easily touched. For this reason, if the notch part 18 becomes large, it will be easy for a user to feel that the part in which the electrostatic sensor 30 was provided is cold. From this point of view, it is desirable that the notch 18 is small.

  On the other hand, in the embodiment, an adhesive body 40 that bonds a part 12a of the inner surface 12 and the case 31 of the electrostatic sensor 30 is provided. Thereby, since the case 31 of the electrostatic sensor 30 can be fixed to the inner surface 12 of the toilet seat 10 by the adhesive 40 without using a screw or the like, the cutout portion 18 can be made small. That is, since it is possible to reduce the portion where the heat of the heater 15 is difficult to be transmitted, the user can be prevented from feeling cold.

  In addition, when the case 31 is fixed using screws, the seating surface 13 may be uneven (sink) corresponding to the inner surface 12 where the boss is provided. On the other hand, when it adheres with the adhesive body 40, since it is not necessary to provide a boss | hub, the unnecessary unevenness | corrugation of the seating surface 13 can be suppressed. Moreover, when a double-sided tape is used for the adhesive body 40, since the electrostatic sensor 30 can be easily fixed to the inner surface 12 of the toilet seat 10 with a double-sided tape, workability can be improved.

  Although the shape of the notch 18 is arbitrary, for example, a shape matching the case 31 of the electrostatic sensor 30 is desirable. In this example, according to the rectangular case 31, the shape of the notch 18 is rectangular. Thereby, it is suppressed that the notch part 18 becomes large.

  A load such as the weight of the seated user is applied to the seating surface 13. Accordingly, the toilet seat 10 is elastically deformed. In such a case, the case 31 of the electrostatic sensor 30 may be easily detached from the toilet seat 10. On the other hand, in the embodiment, at least a part of the adhesive body 40 is an elastic body 40a. When the toilet seat 10 is deformed by a human body load or the like, the elastic body 40 a is deformed following the deformation of the toilet seat 10. Thereby, even if the toilet seat 10 is deformed, the electrostatic sensor 30 can be made difficult to come off from the toilet seat 10.

  In addition, when the adhesive body 40 is a single layer structure, the adhesive body 40 may be comprised only with the elastic body. When the adhesive body 40 has a multilayer structure, at least one layer of the adhesive body may be formed of an elastic body.

Further, in the present specification, the “elastic body” of the adhesive body 40 refers to a softer material than the toilet seat 10 (a part of the toilet seat 10 positioned vertically above the electrostatic sensor 30). For example, the Young's modulus of the elastic body is lower than the Young's modulus of the toilet seat 10. For example, the rigidity (shear elastic modulus) of the elastic body is lower than the rigidity of the toilet seat 10.
For example, the elastic body is softer than the case 31. For example, the Young's modulus of the elastic body is lower than the Young's modulus of the case. For example, the rigidity of the elastic body is lower than the rigidity of the case.

  3A, the thickness T1 (the length along the first direction D1) of the adhesive body 40 is thicker than the thickness T2 of the adhesive body 41, and the thickness T3 of the metal film 17 is larger. Thicker than. By increasing the thickness of the adhesive body 40, the adhesive body 40 (elastic body 40a) is more easily deformed in accordance with the deformation of the toilet seat 10. Thereby, the electrostatic sensor 30 can be made more difficult to come off the toilet seat 10. On the other hand, by reducing the thickness of the adhesive 41, the distance between the detection electrode 33 and the human body touching the seating surface 13 is shortened. Thereby, the capacity | capacitance of the capacitor | condenser 60 can be enlarged and the detection accuracy of the electrostatic sensor 30 can be improved.

  Further, when the cutout portion 18 is reduced, the metal film 17 approaches the detection electrode 33. When the metal film 17 approaches the detection electrode 33, the detection electrode 33 is affected by the metal film 17. For example, the parasitic capacitance between the detection electrode 33 and the metal film 17 is increased. Thereby, detection accuracy falls. On the other hand, in the embodiment, the shield electrode 34 is provided. For example, the parasitic capacitance between the shield electrode 34 and the detection electrode 33 is larger than the parasitic capacitance between the detection electrode 33 and the metal film 17. The shield electrode 34 can suppress the influence of the metal film 17 on the detection electrode 33. Thereby, even when the notch part 18 is made small, it can suppress that the detection accuracy of the electrostatic sensor 30 falls. Moreover, compared with the case where the shield electrode 34 is not provided, since the detection accuracy is not easily lowered even if the metal film 17 and the detection electrode 33 are not accurately aligned, the workability can be improved.

  In general, the dielectric constant of air is lower than the dielectric constant of the adhesive 40. If air with a low dielectric constant enters between the inner surface 12 of the toilet seat 10 and the detection electrode 33, the detection accuracy of the electrostatic sensor 30 decreases. On the other hand, as described with reference to FIGS. 3A and 3B, the area of the adhesive body 40 is the same as the area of the detection electrode 33 or larger than the area of the detection electrode 33. Thereby, by arranging the adhesive 40 between the inner surface 12 of the toilet seat 10 and the detection electrode 33, it is possible to suppress the generation of an air layer between the inner surface 12 of the toilet seat 10 and the detection electrode 33. Can do. Moreover, it can suppress that a part of detection electrode 33 is covered with the metal film 17 (for example, the 2nd metal film part 172 mentioned later). Therefore, the detection accuracy of the electrostatic sensor 30 can be improved.

FIG. 5A and FIG. 5B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment.
5A is a cross-sectional view similar to FIG. 3A, and FIG. 5B is a plan view similar to FIG. 3B.

  In the example shown in FIGS. 5A and 5B, the area of the notch 18 is smaller than the area of the case 31 when viewed along the first direction D <b> 1, and the area of the detection electrode 33. Or larger than the area of the detection electrode 33. When viewed along the first direction D1, the outer periphery 18e of the notch 18 is provided so as to surround the outer periphery 33e of the detection electrode 33. The outer periphery 31 e of the case 31 surrounds the outer periphery 18 e of the notch 18. The notch 18 overlaps the detection electrode 33 in the first direction D1. The notch 18 does not overlap the outer periphery 31e of the case 31 and the shield electrode 34 in the first direction D1. The metal film 17 does not overlap with the detection electrode 33 in the first direction D1. Further, the metal film 17 overlaps the outer periphery of the case 31 and the shield electrode 34 in the first direction D1. Further, the area of the adhesive body 40 is the same as the area of the detection electrode 33 when viewed along the first direction D1.

  Thus, by making the area of the notch 18 smaller than the area of the case 31, it is possible to further suppress the user from feeling cold. Furthermore, since the area of the notch 18 is larger than the area of the detection electrode 33, the electrostatic sensor 30 can be attached so that the metal film 17 and the detection electrode 33 do not overlap in the first direction D1. Thereby, the fall of the detection accuracy of the electrostatic sensor 30 can be suppressed. Therefore, while suppressing a decrease in detection accuracy of the electrostatic sensor 30, the notch 18 can be made as small as possible to prevent the user from feeling cold.

FIG. 6A and FIG. 6B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment.
6A is a cross-sectional view similar to FIG. 3A, and FIG. 6B is a plan view similar to FIG. 3B.

  In the example shown in FIGS. 6A and 6B, the shapes of the metal film 17 and the notch 18 are the same as those shown in FIGS. 5A and 5B. In this example, the area of the adhesive body 40 is the same as the area of the case 31 when viewed along the first direction D1. The adhesive body 40 overlaps with the shield electrode 34 and a part of the metal film 17 in the first direction D1. A part of the metal film 17 is disposed between the adhesive body 40 and the inner surface 12 of the toilet seat 10.

  As described above, the metal film 17 and the adhesive 40 are overlapped with each other, so that the area of the adhesive 40 can be increased while reducing the notch 18. Thereby, adhesive strength can be improved, suppressing that a user feels cold.

FIG. 7A and FIG. 7B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment. 7A is a cross-sectional view similar to FIG. 3A, and FIG. 6B is a plan view similar to FIG. 3B.
In this example, the metal film 17 includes a first metal film part 171 and a second metal film part 172. The first metal film unit 171 is, for example, a metal foil. The second metal film unit 172 is, for example, a metal foil different from the first metal film unit 171. The second metal film part 172 is in contact with the first metal film part 171.

  The first metal film part 171 is provided around the notch part 18. 7A, at least a part of the second metal film part 172 is disposed between the first metal film part 171 and the notch part 18. As shown in FIG.

  For example, the cutout portion 18 is formed by the second metal film portion 172. In FIG. 7B, first to fourth metal foils 172 a to 172 d are provided as the second metal film portion 172. Each of the first to fourth metal foils 172a to 172d is a strip-shaped metal foil.

  The first metal film portion 171 is provided with an opening (notch portion 19) larger than the notch portion 18. Each of the first to fourth metal foils 172a to 172d is arranged so as to overlap the end portion (the outer periphery 19e of the notch portion 19) of the first metal film portion 171 and cover the outer portion of the notch portion 19. . The notch 18 is a region surrounded by the first to fourth metal foils 172a to 172d.

  That is, when viewed along the first direction D1, the second metal film part 172 (first to fourth metal foils 172a to 172d) surrounds the outer periphery of the electrostatic sensor 30, and the first metal film part 171 is The outer periphery of the second metal film part 172 is surrounded. The notch 18 is doubly surrounded by the first metal film part 171 and the second metal film part 172.

  The first to fourth metal foils 172a to 172d may be provided so as to overlap each other. For example, in the example shown in FIG. 7B, one end side of the first metal foil 172a overlaps with the second metal foil 172b, and the other end side of the first metal foil 172a overlaps with the fourth metal foil 172d. .

  When attaching the electrostatic sensor 30 to the toilet seat 10, first, the first metal film portion 171 is provided on the inner surface 12 of the toilet seat 10. Specifically, a metal foil that becomes the first metal film portion 171 is bonded. Thereafter, the case 31 of the electrostatic sensor 30 is fixed to the part of the inner surface 12 of the toilet seat 10 exposed by the notch portion 19 of the first metal film portion 171 by the adhesive body 40.

  Thereafter, the second metal film part 172 is provided on a part of the inner surface 12 of the toilet seat 10 exposed by the notch part 19 of the first metal film part 171. Specifically, the first to fourth metal foils 172 a to 172 d are bonded to the exposed inner surface 12 around the electrostatic sensor 30. As a result, a notch 18 smaller than the notch 19 is formed.

  Thus, after fixing the 1st metal film part 171 and the electrostatic sensor 30 to the inner surface 12 of the toilet seat 10, the 2nd metal film part 172 is provided. When attaching the 1st metal film part 171 to the inner surface 12, the position of the 1st metal film part 171 may shift from a predetermined position. Even in such a case, the displacement of the position of the first metal film portion 171 can be absorbed by attaching the electrostatic sensor 30 and attaching the second metal film portion 172 around the electrostatic sensor 30. Thereby, the workability at the time of attaching the 1st metal film part 171 can be improved. Further, by providing the second metal film portion 172, the small cutout portion 18 can be easily formed.

FIG. 8A and FIG. 8B are a cross-sectional view and a plan view illustrating another toilet seat device according to the embodiment. 8A is a cross-sectional view similar to FIG. 3A, and FIG. 8B is a plan view similar to FIG. 3B.
The second metal film part 172 does not overlap with the detection electrode 33 in the first direction D1. In this example, the second metal film portion 172 overlaps the outer periphery 31e of the case 31 and the shield electrode 34 in the first direction D1. Further, the area of the adhesive body 40 is the same as the area of the detection electrode 33 when viewed along the first direction D1. As described above, the cutout portion 18 may be formed to be smaller by using the second metal film portion 172.

The embodiment of the present invention has been described above. 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, installation form, and the like of each element included in the toilet seat device are not limited to those illustrated, but 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, 11 Opening part, 12 Inner surface, 13 Seating surface, 15 Heater, 17 Metal film, 18 Notch part, 19 Notch part, 30 Electrostatic sensor, 31 Case, 32 Board | substrate, 33 Detection electrode, 34 Shield electrode , 35 circuit unit, 35a constant current source, 35b reference capacitor, 40 adhesive body, 40a elastic body, 41 adhesive body, 51 control unit, 60-63 capacitor, 100 toilet seat device, 171 first metal film unit, 172 second metal Film part, 172a-172d 1st-4th metal foil

Claims (7)

A hollow toilet seat having an inner surface;
A heater for heating the toilet seat;
A metal film provided on the inner surface of the toilet seat for transferring heat of the heater, the metal film having a notch provided so that a part of the inner surface is exposed;
An electrostatic sensor having a detection electrode for detecting a user seated on the toilet seat, and a case covering the detection electrode;
An adhesive body for bonding the part of the inner surface and the case;
A toilet seat device comprising:   The toilet seat device according to claim 1, wherein the adhesive body includes an elastic body.   The toilet seat device according to claim 1, wherein the adhesive body is a double-sided tape.   The toilet seat device according to any one of claims 1 to 3, wherein the electrostatic sensor further includes a shield electrode surrounding the detection electrode. The metal film has a first metal film part and a second metal film part in contact with the first metal film,
The first metal film part is provided around the notch part,
The toilet seat device according to any one of claims 1 to 4, wherein at least a part of the second metal film part is provided between the first metal film part and the notch part.   The toilet seat device according to claim 1, wherein an area of the notch is smaller than an area of the case and larger than an area of the detection electrode.   The toilet seat device according to any one of claims 1 to 6, wherein an area of the adhesive body is the same as an area of the detection electrode or larger than an area of the detection electrode.

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