JP5029557B2 - Toilet seat heater and toilet seat device using the same - Google Patents

Description

  The present invention relates to a toilet seat heater that instantaneously heats a toilet seat and a toilet seat device using the same.

  Conventionally, this type of toilet seat heater has a wire heater inserted in a mounting groove of a support base, a toilet seat heater made of aluminum foil, and a socket for supporting a connection terminal connected to an end of the linear heater. The toilet seat body and toilet seat heater are integrally molded by setting in a mold and filling a mold with molten resin. In particular, the connection terminal is fixed to the end of the linear heater by crimping and is disposed in the socket, and the heat of the heater is directly transmitted to the connection terminal.

FIG. 12 is a plan view in which a part of the toilet seat in which the toilet seat heater is integrally formed is broken. The toilet seat body 1 and the support base 2 are integrated, and the support base 2 has a heater mounting groove 3. It is arranged in a loop shape, and a linear heater 4 is inserted into the heater mounting groove 3. The upper surfaces of the support base 2 and the heater 4 are covered with an aluminum foil 5, and a socket 6 that supports a connection terminal is installed at the rear of the toilet seat.
JP-A-8-289858

  However, in the conventional configuration, the linear heater 4 and the connection terminal are crimped and fixed, and the heat of the heater is directly transmitted to the connection terminal. There was a problem that there was a concern about poor contact between the connection terminal and the terminal on the power supply side.

  The present invention solves the above-described conventional problems, and improves the waterproof performance of the toilet seat heater and improves the stability and durability of the connection between the heater wire and the power supply lead wire, thereby improving safety. An object is to provide a toilet seat heater having high durability.

  In order to solve the above-described conventional problems, the toilet seat heater of the present invention has a linear heater attached in a meandering shape to a metal foil having a shape corresponding to the seating portion of the toilet seat, and the linear heater and the linear heater are attached to the linear heater. In the configuration in which the lead wire for supplying electric power is connected via a connection terminal, the connection terminal integrally forms a substantially flat heat radiation portion between the heater wire connection portion and the lead wire connection portion, and the heat radiation portion is insulated. It is set as the structure closely_contact | adhered to the said metal foil through a body.

  As a result, the heat generated by the linear heater is transmitted to the metal foil from the heat radiating portion of the connection terminal, so the temperature of the connection terminal is lowered, and the connection between the linear heater and the lead wire is stable over a long period of time. Therefore, a toilet seat heater with high safety and durability can be provided.

  The toilet seat heater of the present invention can improve safety and durability.

In the first invention, a linear heater is attached in a meandering shape to a metal foil having a shape corresponding to a seating portion of a toilet seat, and the lead wire for supplying electric power to the linear heater and the linear heater is connected via a connection terminal. The connection terminal is formed by integrally forming a substantially planar heat radiation portion between the heater wire connection portion and the lead wire connection portion, and the heat radiation portion is in close contact with the metal foil through an insulator. As a result, the heat generated by the linear heater is transferred to the metal foil from the radiating part of the connection terminal, so the temperature of the connection terminal decreases, and the connection between the linear heater and the lead wire is stable over a long period of time. Therefore, a toilet seat heater having high safety and durability can be provided.

  According to a second invention, in particular, in the first invention, two metal foils are installed, a linear heater is sandwiched between them, and a heat dissipation part of the connection terminal is provided on at least one of the metal foils via an insulator. By adopting a close structure, the efficiency of heat transfer from the linear heater to the metal foil is increased, so that the overall temperature of the toilet seat heater can be equalized, the temperature of the connection terminal can be lowered, and more stable. Durability can be improved.

  According to a third aspect of the invention, in the first or second aspect of the invention, a waterproof insulator covering the metal foil, the linear heater, and the connection terminal is provided, so that the entire toilet seat heater including the connection terminal has a waterproof structure. It is possible to improve safety and durability.

  4th invention is equipped with the toilet seat which formed the seating part with the metal at least, and the toilet seat heater of any one of the 1st-3rd invention was stuck on the back surface of the said seating part, and safety and durability A toilet seat device with high performance can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of the appearance of the toilet seat device according to the present embodiment installed on a toilet, and FIG. 2 is a schematic diagram showing the configuration of the toilet seat device 110.

<1> Configuration of Toilet Seat Device As shown in FIG. 1, the toilet seat device 100 includes a main body 200, a toilet lid 300, a toilet seat 400, a remote controller 500, and a human body detection sensor 600, and the main body 200, the toilet lid 300, and the toilet seat 400. Is integrally formed and installed on the upper surface of the toilet bowl 700.

  A toilet lid 300 and a toilet seat 400 are attached to the main body 200 via a toilet seat toilet lid rotation mechanism (not shown) so as to be electrically opened and closed. In the state where the toilet lid 300 is opened as shown in FIG. 1, the toilet lid 300 stands so as to be positioned at the rearmost part of the toilet seat device 100. When the toilet lid 300 is closed, the upper surface of the toilet seat 400 is concealed.

  The main body 200 includes a cleaning water supply mechanism (not shown), a heat exchanger (not shown), a cleaning mechanism including a cleaning nozzle 201, a drying unit (not shown), and a control unit (not shown). (Not shown) and the like are incorporated.

  A seating sensor 202 is installed at the front corner of the main body 200. The seating sensor 202 is a reflective infrared sensor, and detects the presence of a user on the toilet seat 400 by detecting infrared light reflected from the human body. In addition, an operation unit 203 is provided on a side portion of the main body 200 so that main functions of the toilet seat device can be operated.

  The washing water supply mechanism and the heat exchanger are connected to the washing nozzle 201, and the washing water supplied from the water pipe is heated by the heat exchanger to supply hot water to the washing nozzle. The washing water is spouted out toward the local area to clean the local area of the user. The washing nozzle includes a butt washing nozzle part for washing the butt and a bidet nozzle part for washing the female part.

  Further, the drying unit can blow the warm air toward the local area wetted by the washing water and dry the local area.

  Note that the cleaning mechanism and the drying unit are not essential components of the toilet seat device, and may be a toilet seat device that does not include these components.

  The remote controller 500 is provided with a plurality of operation switches. The remote controller 500 is attached to a place such as a wall surface of a toilet room that can be operated by a user seated on the toilet seat 400 and operates each function of the toilet seat device 100.

  The human body detection sensor 600 is attached to a wall surface of a toilet room. The human body detection sensor 600 is a reflective infrared sensor, and detects that a user has entered the toilet room when detecting infrared light reflected from the human body.

  The control unit of the main body 200 controls the operation of each unit of the toilet seat device 100 based on signals transmitted from the remote controller 500, the human body detection sensor 600, and the seating sensor 202.

  When there is no user in the toilet room, the toilet seat device 100 of the present invention stops energizing the toilet seat heater or keeps the temperature low at about 20 ° C. When the user enters the toilet room, a signal from the human body detection sensor 600 is received, and the toilet seat heater is energized. The heater of the toilet seat is a very high output heater of about 800W, and the toilet seat seating surface is about 40 ° C for about 6 to 10 seconds from when the user enters the toilet room to the seat on the toilet seat. Warm to an appropriate temperature. After the toilet seat reaches an appropriate temperature, the energization of the toilet seat heater is lowered to a low wattage of about 50 W to maintain the appropriate temperature. When the user gets out of the toilet room, the energization to the toilet seat heater is stopped or the temperature is kept at a low temperature of about 20 degrees. That is, the toilet seat device greatly reduces the power when there is no user in the toilet room.

<2> Configuration of Toilet Seat 400 FIG. 2 is a perspective view of the toilet seat 400 in an assembled state, and FIG. 3 is an exploded perspective view of the toilet seat 400.

  2 and 3, the toilet seat 400 includes a substantially elliptical annular upper toilet seat casing 410 formed mainly of aluminum, a substantially horseshoe-shaped toilet seat heater 450 adhered to the back surface of the upper toilet seat casing 410, and a composite. A substantially elliptical annular lower toilet seat casing 420 formed of resin is configured as a main component.

  Hereinafter, the front side viewed from the seated user is defined as the front portion of the toilet seat 400, and the rear side viewed from the seated user is defined as the rear portion of the toilet seat 400.

  The upper toilet seat casing 410 is formed by pressing an aluminum plate having a thickness of about 1 mm by pressing or the like, and has a heat-resistant polyester powder coating film formed on the front and back surfaces. Insulating performance can be improved by adopting powder coating that does not easily generate pinholes.

  Instead of the aluminum plate, other metal having good thermal conductivity such as a plate material such as copper or stainless steel or a molded product of magnesium alloy may be used. Further, the surface treatment applied to the aluminum plate is not limited to the above specifications, and other chemical treatments or other coatings using acrylic or urethane paints can be selected.

  The upper toilet seat casing 410 has a curved portion 412 formed continuously at the rear portion of a substantially elliptical annular seating surface 411. The seating surface 411 forms an upwardly convex curved surface having an inclination in which the outer peripheral portion is higher than the inner peripheral portion. The difference in height between the inner peripheral portion and the outer peripheral portion at the side portion of the seating surface 411 is about 25 mm, and the front portion is smaller than this.

  The bent portion 412 and the seating surface 411 are connected by a continuous concave curved surface, and the upper portion is an inclined surface. The upper edge 412a of the bent portion 412 is a large curve close to a horizontal line, and the width of the bent portion 412 is substantially the same as the lateral width of the seating surface 411. The height difference between the inner peripheral portion of the rear portion of the seating surface 411 and the upper edge 412a of the bent portion 412 is about 80 mm, and the height difference of the bent portion 412 is about 3.2 times the height difference of the side portion of the seating surface 411. It has become.

  The toilet seat heater 450 is formed in a substantially horseshoe shape with a part of the front portion cut off. The toilet seat heater 450 is configured by meandering a linear heater between two metal foils made of aluminum. The toilet seat heater 450 is provided with a linear heater so that the seating surface 411 and the bent portion 412 can be heated, and the density is changed depending on the location so that the thigh and buttocks of the seated user can be heated comfortably. It is arranged.

  The lower toilet seat casing 420 is a molded product using a resin material, and is composed of a main body portion 421 whose planar shape is substantially the same as that of the upper toilet seat casing 410, and arm portions 422 that protrude obliquely upward to the rear of both sides of the main body portion 421. ing. The upper toilet seat casing 410 and the lower toilet seat casing 420 are coupled at the inner peripheral portion and the outer peripheral portion, and a watertight means is applied to the joint portion.

  A toilet seat 400 having a toilet seat heater 450 adhered to the back surface of the upper toilet seat casing 410 and a lower toilet seat casing 420 coupled thereto includes an arm portion 422 at the rear portion as shown in FIG. 2, and the arm portion 422 is attached to the toilet seat of the main body 200. By being coupled to a toilet lid rotation mechanism (not shown), it is pivotally supported.

<3> Basic Configuration of Toilet Seat Heater FIG. 4 is a bottom view of the toilet seat heater attached to the upper toilet seat casing, and FIG. 5 is a plan view of the toilet seat heater.

  As shown in FIG. 4, a toilet seat heater 450 is adhesively fixed to almost the entire back surface of the upper toilet seat casing 410, and a thermostat 450Q and a temperature fuse 450R are provided on the rear surface of the toilet seat heater 450 as an overheat prevention device. It is installed. The toilet seat temperature detection thermistor 401a for feedback control of the toilet seat heater 450 based on the temperature of the seating portion 411 of the toilet seat 400 is attached to the surface of the metal foil 453 on the side surface.

  A ground wire 480 for ensuring safety is connected to the outer periphery of the upper toilet seat casing 410.

  As shown in FIG. 5, the toilet seat heater 450 is formed in a substantially horseshoe shape in which a part of the front portion is cut off. The toilet seat heater 450 has a basic configuration in which a linear heater 460 is arranged in a meandering shape between two metal foils 451 and 453 made of aluminum.

  As shown in FIG. 5, the linear heater 460 has an upper toilet seat in the region from the metal foil center part SE3 to the metal foil one end SE1 and in the region from the metal foil center part SE3 to the other end SE2 of the metal foil. It is arranged in a meandering shape that meanders in the left-right direction according to the shape of the casing 410. The linear heater 460 is disposed such that the meandering bent portion is positioned in the vicinity of the outer side and the inner side of the upper toilet seat casing 410.

  Specifically, the first series A meandering shape is formed by the linear heater 460 extending from one side of the rear portion of the toilet seat heater 450 to the vicinity of the one end SE1 of the metal foils 451 and 453 while moving to the left and right. The Further, the linear heater 460 meanders from the vicinity of one end SE1 of the metal foils 451 and 453 to the left and right, and passes through the vicinity of the central portion SE3 of the metal foils 451 and 453, and the other end SE2 of the metal foils 451 and 453. The second series B meandering shape is formed by extending to the vicinity of. Further, the linear heater 460 extends from the vicinity of the other end part SE2 of the metal foils 451 and 453 to the one side of the rear part of the toilet seat heater 450 through the vicinity of the central part SE3 of the metal foils 451 and 453, thereby the first series. A meandering shape of A is formed.

  As shown in FIG. 5, the meandering linear heater 460 of the first series A and the meandering linear heater 460 of the second series B are arranged substantially in parallel. The first series A and second series B meandering linear heaters 460 are continuous from the heater start end 460a to the heater end end 460b.

  The heater start end portion 460a and the heater end portion 460b of the linear heater 460 are respectively connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400 through connection terminals described later.

  In this example, the linear heater 460 has a meandering shape in which a bent portion is positioned in the vicinity of the inner side of the toilet seat heater 450 and in the vicinity of the outer side. Thereby, the space | interval between bending parts is short. Therefore, since the length change resulting from thermal expansion and thermal contraction is small, even if the linear heater 460 expands and contracts, the strain due to expansion and contraction is absorbed and buffered at the bending portion. As a result, the stress resulting from the thermal expansion and contraction of the linear heater 460 is reduced, and damage due to long-term use can be suppressed.

  In addition, since the thermal expansion and contraction of the linear heater 460 is small, the adhesion to the metal foils 451 and 453 can be maintained well for a long period. Thereby, heating of the toilet seat heater 450 can be performed efficiently and reliably.

  Moreover, the length of a bending part and the space | interval between bending parts can be adjusted arbitrarily. Thereby, the heating distribution of the toilet seat heater 450 can be adjusted.

  For example, the length of the bent portion and the interval between the bent portions are adjusted such that the heating density in the vicinity of the outer side and the inner side of the toilet seat heater 450 is higher than the heating density in the central portion of the toilet seat heater 450. Thereby, the uniform heating temperature can be maintained in the entire region of the toilet seat heater 450.

  Further, the current direction in the first series A meandering linear heater 460 is opposite to the current direction in the second series B meandering linear heater 460. As a result, the electromagnetic waves generated from the linear heaters 460 cancel each other. As a result, generation of noise is prevented.

  Further, as shown in FIG. 10, a temperature measuring section 450T in which the linear heater 460 meanders at a high density is formed at the rear of the toilet seat heater 450. The temperature detecting section 450T is provided with a resettable thermostat 450Q using a bimetal for preventing overheating. When the toilet seat heater 450 reaches an unexpected abnormal temperature, the return-type thermostat 450Q is opened to temporarily stop energization. Details of the thermostat mounting method will be described later.

  Further, a temperature shoe 450R is installed at the rear of the toilet seat heater 450 as a backup function of the thermostat 450Q.

  The thermal fuse 450R is sealed with a tube for waterproofing and insulation, and is temporarily fixed with an adhesive tape to the rear part of the toilet seat heater 450. On the other hand, a temperature fuse fixing tool formed of a spring material is provided in the lower toilet seat casing 420 of the toilet seat 400, and the upper toilet seat casing 410 and the lower toilet seat casing 420 are assembled, whereby the temperature fuse 450R is made elastic by the elasticity of the temperature fuse fixing tool. The temperature can be accurately detected by being in close contact with the heater 450.

  When the toilet seat heater 450 reaches an unexpected abnormal temperature, the return-type thermostat 450Q is opened to temporarily stop energization. In addition, when the reset thermostat 450Q breaks down and the toilet seat heater 450 tries to reach a dangerous temperature, the non-reset type thermal fuse 450Q is blown to completely cut off the power supply.

<4> Detailed Configuration of Toilet Seat Heater FIG. 6 is a schematic diagram showing a cross-sectional view of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  As shown in FIG. 6, the upper toilet seat casing 410 is formed of an aluminum plate 410a having a thickness of 1 mm. On the upper surface of the aluminum plate 410a, a surface decorative layer 410b is formed by polyester powder coating. The upper surface of the surface decorative layer 410b becomes the seating surface 411. In addition, a heat resistant paint insulating layer 410c is formed on the lower surface of the aluminum plate 410a. The heat resistant coating insulating layer 410c is, for example, a polyester powder coating film having a film thickness of 100 μm and heat resistance of 150 ° C., and has an effect as an insulating coating layer.

  A toilet seat heater 450 is attached to the lower surface of the heat-resistant coating insulating layer 410c via an adhesive layer 452c.

  A toilet seat insulating film 455 made of polyethylene terephthalate (PET) having a film thickness of 12 to 25 μm and having a heat resistance of 150 ° C. is disposed on the upper surface side of the toilet seat heater 450 facing the heat resistant coating insulating layer 410c.

  Next, two metal foils 451 and 453 are arranged. The metal foils 451 and 453 are made of a metal foil laminate sheet obtained by integrally laminating aluminum sheets 451a and 453a and resin films 451p and 453p, and are used for toilet seat insulation. A resin film 451p is provided facing the film 455 through an adhesive layer 452a, and an aluminum sheet 451a, an adhesive layer 452b, an aluminum sheet 453a, and a resin film 453p are arranged in this order.

  On the lower surface side of the resin film 453p of the metal foil 453, a waterproof insulating film 471 made of polyethylene terephthalate (PET) is disposed via an adhesive layer 452d.

  The toilet seat insulating film 455 and the waterproof insulating film 471 have an outer shape that is approximately 5 mm or more larger than the outer shape over the entire circumference of the metal foils 451 and 453, and the entire periphery of the toilet seat heater 450 is connected to the toilet seat insulating film 455. A waterproof insulating film 471 is directly attached via an adhesive layer 452d to form a waterproof insulator, and the metal foils 451 and 453 and a linear heater 460 described later are covered with a sealed waterproof insulator, For example, even when the toilet seat 400 is submerged, the charging portion of the toilet seat heater 450 is prevented from being submerged and no electric leakage occurs.

  In particular, the distance of 5 mm on the outer peripheral portion is sufficient to keep the insulation distance between the end faces of the metal foils 451 and 453 that can become a charging part and the aluminum plate 410a of the upper toilet seat casing 410 in the unlikely event that the linear heater 460 breaks down, The insulation distance with the seating surface 411 which a human body directly contacts is ensured.

  A linear heater 460 is disposed between the metal foils 451 and 453, and the linear heater 460 is bonded and fixed to the aluminum sheet 453a via an adhesive layer 452b.

  The linear heater 460 includes a heating wire 463a having a circular cross section, an enamel layer 463b, and an insulating coating layer 462. The outer peripheral surface of the heating wire 463a having a circular cross section is sequentially covered with the enamel layer 463b and the insulating coating layer 462. The enamel wire 463 is constituted by the heating wire 463a and the enamel layer 463b.

  The heating wire 463a has a diameter of 0.16 to 0.25 mm and is made of copper or a copper alloy. In this example, a high tensile strength heater wire made of a 4% Ag—Cu alloy having a diameter of 0.168 mm is used as the heating wire 463a. The resistance value is 0.88 Ω / m.

  The enamel layer 463b is made of polyester imide (PEI) having heat resistance of 180 to 300 ° C. The film thickness of the enamel layer 463b is 20 μm or less, and is 12 to 13 μm in this example. Such an enameled wire 463 sufficiently secures an electrical withstand voltage performance of 1 minute or more at 1000 V, which is an electrical equipment technical standard, even if the enamel layer 463b has a very thin film thickness of about 0.01 to 0.02 mm. be able to. Alternatively, polyimide (PI) or polyamideimide (PAI) may be used as the material for the enamel layer 463b.

  The insulating coating layer 462 is made of a fluororesin such as a perfluoroalkoxy mixture (hereinafter referred to as PFA) having a heat resistance of 260 ° C. The thickness of the insulating coating layer 462 is 0.1 to 0.15 mm. The insulating coating layer 462 made of PFA can be formed by extrusion. In this case, even if the thickness of the insulating coating layer 462 is as thin as 0.05 to 0.1 mm, it is possible to ensure electrical withstand voltage performance that can withstand lightning surge.

  Heat generation can be transmitted most efficiently by forming the metal foils 451 and 453 so as to be in close contact with and cover the entire outer periphery of the linear heater 460. If there is an air layer around the linear heater 460 (between the metal foil), the heat radiation from the linear heater 460 is prevented from being released and the heater wire temperature rises. At this time, if the heater wire temperature exceeds the heat resistance temperature of the enamel layer 463b and the insulating coating layer 462, the coating material deteriorates and the insulating property is destroyed, and eventually the heating wire 463a is broken. Therefore, in the manufacturing process of the toilet seat heater 450, an air vent hole is provided at a main point of the metal foil 451 to eliminate air staying between the metal foils 451 and 453, and the metal foils 451 and 453 and the linear heater 460 are in close contact with each other. Consideration to do.

  In this configuration, the linear heater 460 is disposed in close contact with the aluminum metal foils 451 and 453. This prevents the temperature of the linear heater 460 from rising by bringing the linear heater 460 into close contact with a metal having excellent thermal conductivity. Thereby, durability performance improves.

  Further, since the linear heater 460 has a high temperature exceeding 100 ° C. when energized, it is necessary to select an adhesive material near the heater wire that has excellent heat resistance.

<5> Method of Connecting the Linear Heater 460 and the Lead Wire 470 FIG. 7 shows insulation and waterproofing of a connection cover that covers the upper portion of the connection terminal in order to show the connection state of the linear heater 460 and the lead wire 470 to the toilet seat heater 450. FIG. 8 is a plan view showing a state where members are removed, and FIG. 8 is a schematic view showing a cross section of a connecting portion between the linear heater 460 and the lead wire 470.

As shown in FIGS. 7 and 8, the core wire of the linear heater 460 and the lead wire 470 is connected via a connection terminal 461. The connecting terminal 461 has a substantially L-shaped planar shape, and one end of the connecting terminal 461 has a U-shaped bent portion connected to the linear heater 460, and the L-shaped corner has a lead. A cylindrical lead wire holding portion 461b for inserting and holding a wire is formed, and a lead wire connecting portion 461c formed in a cylindrical shape for connecting the lead wire 470 is formed at the other end portion. The heater wire connecting portion 461a and the lead wire holding portion 461b are integrally formed via a substantially flat plate-like heat radiating portion 461d.

  The connection method between the linear heater 460 and the connection terminal 461 is such that the tip of the linear heater 460 is inserted into the heater connection portion 461a, the heater wire connection portion 461a is sandwiched between a pair of electrodes, and pressed while the terminal 471 and the linear terminal 461 are pressed. A current is supplied to the heater 460. Thereby, the insulating coating layer 462 and the enamel layer 463b of the linear heater 460 are melted. As a result, the heating wire 463a of the linear heater 460 contacts the connection terminal 461.

  The lead wire 470 and the connection terminal 461 are connected by inserting the core wire of the lead wire 470 into the lead wire connecting portion 461c and connecting it by thermal caulking.

  Next, a configuration for dissipating heat of the connection terminal 461 through the metal foil 451 and a configuration for ensuring insulation of the connection terminal 461 exposed by the metal will be described.

  As shown in FIG. 8, the back surface side of the connection terminal 461 is in close contact with the aluminum sheet 451a of the metal foil 451 of the toilet seat heater 450 via the terminal insulating film 456 made of PET film so that the heat radiating portion 461d of the connection terminal 461 is disposed. It is arranged. As described in the detailed configuration of the toilet seat heater, the metal foil 451 is attached to the upper toilet seat casing 410 via the adhesive layer 452a, the toilet seat insulating film 455, and the adhesive layer 452c.

  On the other hand, the surface side of the connection terminal 461 is covered with an insulating cover 457 made of polycarbonate molded into a shape that can accommodate the connection terminal 461 and the lead wire 470, and the outer side is covered with an aluminum sheet 458a and a resin film 458p via an adhesive layer 452d. The metal foil 458 which consists of is covered. Further, the outer side of the metal foil 458 is covered with a waterproof cover 459 made of butyl rubber having insulation and waterproof performance. The outer periphery of the waterproof cover 459 adheres to the toilet seat insulating film 455 and the waterproof insulating film 471, and the connection terminal 461 has a waterproof structure by a waterproof insulator formed by the waterproof cover 459, the toilet seat insulating film 455, and the waterproof insulating film 471. It is made.

  Considering the durability of the linear heater 460, the insulating cover 457 is preferably thinner because the thinner the cover, the better the heat radiation to the metal foil 458. However, since a thickness that does not cause pinholes due to the wires of the lead wire 470 and the burrs of the connection terminals 461 is required, the thickness is preferably about 0.1 mm to 0.3 mm.

  Thus, unlike the arrangement part of the linear heater 460 sandwiched between the metal foils 451 and 453, the connection terminal 461 has a structure that contacts only one of the metal foils 451. The heat radiation performance can be improved by providing the heat radiation part 461d on the substantially flat plate to increase the contact area, preventing the overheating and disconnection of the heating wire 463a, and ensuring the heat uniformity of the toilet seat heater 450. .

  The terminal insulating film 456 and the insulating cover 457 are configured to secure the distance between the connection terminals 461 and the distance between the connection terminals 461 and the metal foils 451 and 453 by about 5 mm. Insulation performance can be secured if the insulation distance is about 3 mm, but a distance of about 5 mm is required in consideration of variation in mounting. On the other hand, when the linear heater 460 on the insulator becomes long, the heat dissipation performance deteriorates, causing local heat generation, resulting in disconnection. Considering the heat insulation and insulation of the linear heater 460, about 5 mm is suitable.

  Furthermore, since the heating wire 463a and the lead wire 470 of the linear heater 460 and the connection terminal 461 are connected by thermal caulking, a thin and reliable electrical connection is realized. Further, since the heating wire 463a is prevented from floating, local overheating and disconnection of the heating wire 463a are prevented.

  In addition, in order to ensure the safety of the toilet seat 400, the toilet seat device 100 according to the present embodiment includes two safety circuits. One safety circuit is a dielectric breakdown detection circuit of the toilet seat heater 450, and the other one safety circuit is connected between the disconnection detection circuit of the toilet seat heater 450. Both safety circuits are used to prevent electric shock of the user when an abnormality occurs in the toilet seat heater 450.

  As shown in FIG. 7, the detection line 481 of the dielectric breakdown detection circuit is connected to the metal foil 451 in the vicinity of the connection terminal 461.

<6> Thermostat Mounting Structure FIG. 9 is a perspective view of a main part in a state where the thermostat is installed on the toilet seat heater, FIG. 10 is an exploded perspective view illustrating the thermostat mounting structure, and FIG. 11 is a cross-sectional view of the thermostat mounting structure. It is a schematic diagram shown.

  As shown in FIG. 10, a temperature measuring part 450T in which the linear heater 460 meanders at a high density is formed on one side of the rear part of the toilet seat heater 450. Mounting holes 492 are provided at predetermined intervals on both sides of the temperature measuring unit 450T. The thermometer 450T is provided with a resettable thermostat 450Q using a bimetal as an excessive rise prevention device.

  As described above, the toilet seat heater 450 is sealed with the toilet seat insulating film 455 and the waterproof insulating film 471, and is configured to prevent flooding. The mounting hole 492 has the same configuration. A mounting hole 492 formed in the toilet seat insulating film 455 and the waterproof insulating film 471 is slightly smaller than the diameter of the through holes 450U of the metal foils 451 and 453. In the present embodiment, the diameter of the through-hole 450U of the metal foils 451 and 453 is 13 mm, and the toilet seat insulating film 455 and the waterproof insulating film 471 mounting hole 492 are 6.5 mm in diameter.

  Adhering the toilet seat insulating film 455 and the waterproof insulating film 471 from above and below the toilet seat heater 450 by taking such a dimensional relationship can prevent the end faces of the through holes 450U of the metal foils 451 and 453 from being exposed. It is desirable that the size of the mounting hole 492 of the toilet seat insulating film 455 and the waterproof insulating film 471 is 6 mm or more smaller in diameter than the through hole 450U. This requires a bonding margin of 3 mm at a minimum to ensure waterproofness. Considering variations in work and component dimensions, stable mass production is possible if a bonding margin as large as possible can be secured.

  A thermostat fixture 490 is installed on the back side of the toilet seat heater 450 (the seating portion 410 side of the toilet seat 400). The thermostat fixture 490 is formed by processing an aluminum plate having a thickness of 0.3 to 0.5 mm, and fixing projections 490a are provided on both sides thereof at the same interval as the arrangement pitch of the mounting holes 492 of the toilet seat heater 450. It is. The fixing projection 490a is integrally formed by cutting and raising the aluminum plate of the thermostat fixture 490 into a cylindrical shape having an outer diameter of 5.8 mm and a height of 2.5 mm by burring. Further, a substantially circular convex portion 490b is formed around the fixed projection 490a.

A thermostat 450Q is installed on the surface side of the toilet seat heater 450 via a thermostat holder 491. The thermostat holder 491 is formed by pressing an aluminum plate or the like. A thermostat holder 491a having a circular hole for holding the thermostat 450Q is provided in the center, and fixing holes 491b are provided on both sides thereof. The thermostat holding portion 491a is fitted from the rear end portion of the thermostat 450Q, and has a shape capable of holding the entire circumference of the thermosensitive portion at the tip, and the fixing hole 491b has the same pitch as the fixing protrusion 490a of the thermostat fixing device 490. The fixing protrusion 490a is of a size that can be inserted.

  FIG. 11 shows a cross-sectional view of the state where the respective parts are assembled. As shown in the figure, the thermostat 450Q is securely attached to the toilet seat heater 450 by caulking the fixing protrusion 490a with the respective parts assembled. The thermosensitive portion at the tip of the thermostat 450Q can be fixed in close contact with the temperature detecting portion 450T of the toilet seat heater 450. In addition, the convex portion 490b provided around the fixed protrusion 490a improves the adhesion between the toilet seat insulating film 455 and the waterproof insulating film 471, thereby improving the waterproof property.

  In addition, a heat insulating sheet 493 is interposed between the thermostat fixture 490 and the toilet seat heater 450 in order to block heat transmitted from the toilet seat heater 450 to the thermostat fixture 490. As a result, the heat generated in the toilet seat heater 450 is not easily transmitted to the thermostat fixture 490, and the heat transmitted to the thermostat 450Q is increased, so that the operation becomes faster.

<7> Effect on Toilet Seat Heater As described above, the toilet seat heater according to the present embodiment has a current flowing in the event of an abnormality due to the linear heater 460 and the connection terminal 461 that are the charging unit by the toilet seat insulating film 455 and the waterproof insulating film 471. The metal foils 451 and 453 that may flow are hermetically sealed, and even if the inside of the toilet seat 400 is submerged, for example, the charging portion of the toilet seat heater 450 is prevented from being submerged and no leakage occurs. In addition, even when an electric current flows through the metal foils 451 and 453 at the time of abnormality, the user can use it safely without leaking to the seating portion of the toilet seat.

  In addition, since the connection terminal of the present embodiment has a heat radiating portion in close contact with the metal foil 451 and dissipates heat from the linear heater 460 to the metal foil 451, the temperature rise of the connection terminal can be suppressed. It is possible to maintain a stable connection state between the heater 460 and the lead wire 470 for a long period of time.

  Since the present invention can stably connect a high-temperature heater wire and a lead wire over a long period of time, it can be applied to the use of a heating device such as a heating device.

The perspective view which shows the external appearance of the toilet seat apparatus in Embodiment 1 of this invention The perspective view which shows the external appearance of the toilet seat in Embodiment 1 of this invention 1 is an exploded perspective view of a toilet seat according to Embodiment 1 of the present invention. The bottom view which shows the state which attached the toilet seat heater to the upper toilet seat casing of the toilet seat in Embodiment 1 of this invention Plan view of toilet seat heater according to Embodiment 1 of the present invention The schematic diagram which shows the cross section of the state which attached the toilet seat heater to the upper toilet seat casing of the toilet seat in Embodiment 1 of this invention Plan view of attachment portion of connecting terminal of toilet seat heater in embodiment 1 of the present invention The schematic diagram which shows the cross section of the attachment part of the connecting terminal of the toilet seat heater in Embodiment 1 of this invention The perspective view which shows the attachment part of the thermostat of the toilet seat heater in Embodiment 1 of this invention The exploded perspective view which shows the attachment part of the thermostat of the toilet seat heater in Embodiment 1 of this invention The schematic diagram which shows the cross section of the attachment part of the thermostat of the toilet seat heater in Embodiment 1 of this invention The top view which fractured | ruptured a part of toilet seat of the conventional toilet seat apparatus

Explanation of symbols

110 Toilet seat device 400 Toilet seat 411 Seating surface (sitting part)
450 Toilet seat heater 451 Metal foil 453 Metal foil 455 Toilet seat insulation film (waterproof insulator)
456 Insulation film (insulator)
459 Waterproof cover (waterproof insulator)
460 Linear heater 461 Connection terminal 461a Heater wire connection part 461c Lead wire connection part 461d Heat radiation part 470 Lead wire 471 Waterproof insulation film (waterproof insulator)

Claims (4)

In a configuration in which a linear heater is attached in a meandering shape to a metal foil having a shape corresponding to a seating portion of a toilet seat, and the lead wire that supplies power to the linear heater and the linear heater is connected via a connection terminal. The connecting terminal is a toilet seat heater configured such that a substantially planar heat radiation portion is integrally formed between a heater wire connection portion and a lead wire connection portion, and the heat radiation portion is in close contact with the metal foil via an insulator. The said metal foil is installed two sheets, the said linear heater is pinched | interposed, and the said thermal radiation part of the said connection terminal is the structure of closely_contact | adhering to at least 1 sheet of the said metal foil via an insulator. Toilet seat heater. The toilet seat heater according to claim 1, further comprising a waterproof insulator that covers the metal foil, the linear heater, and the connection terminal. The toilet seat apparatus which provided the toilet seat which formed the seat part at least with the metal, and stuck the toilet seat heater of any one of Claims 1-3 on the back surface of the said seat part.