JP5104663B2 - Toilet seat device and sanitary washing device using the same - Google Patents

Description

  The present invention relates to a toilet seat device provided with an overtemperature prevention device and a sanitary washing device using the toilet seat device.

  In the conventional toilet seat device of this type, as shown in FIG. 17, the toilet seat is heated to a predetermined temperature by the heating means 2 provided on the back surface of the metal toilet seat 1 to save energy (for example, patent document). 1). In other words, in this type of heated toilet seat, the heating means 2 has to be brought to a proper temperature quickly in a short period of time until it is energized and seated immediately before the user sits on the toilet seat to save power. Toilet seat 1 is used.

Therefore, in the case of a heated toilet seat in which the buttock is placed directly and the temperature rises in a short time, when a situation occurs in which the energization of the toilet seat continues without stopping at a predetermined setting due to some abnormality, a relatively short time In other cases, the user may feel uncomfortable over the proper temperature, and the user needs to stand up from the toilet seat.
JP 2003-79539 A

  As described above, the conventional configuration has a problem that the temperature of the toilet seat 1 may be excessively increased due to an abnormality.

  In view of the problems of the prior art, the problem to be solved by the present invention is to detect an excessive temperature increase in the toilet seat even when an abnormality occurs and the temperature control of the toilet seat becomes impossible. An object of the present invention is to provide a toilet seat device that can be prevented from ascending, thereby providing a safe toilet seat device and a sanitary washing device using the same.

  In order to solve the above problems, a toilet seat device of the present invention has a seating surface, a toilet seat including a metal material, a linear heating element, and a metal foil that holds the linear heating element in a predetermined arrangement pattern. And a waterproof insulating foil of the metal foil, a heat sensitive part, an overheat prevention device for the seating surface, and a locking device for the overheat prevention device, and sandwiching the linear heating element A heating toilet seat in which a toilet seat heater formed by laminating the metal foil with a waterproof insulating foil is adhered to the back side of the seating surface, and the toilet seat heater is disposed in the path of the arrangement pattern of the linear heating element. A dense region portion is formed, and the dense region portion is sandwiched between the heat sensitive portion and the locking tool of the overheat prevention device, and a heat insulator is provided to suppress heat transfer from the dense region portion to the seating portion side. It is.

  The toilet seat apparatus of the present invention can provide a toilet seat heater that can ensure both electrical safety such as ensuring insulation and thermal safety such as prevention of high temperature of the seat, and a toilet seat apparatus using the toilet seat heater.

  A first invention includes a toilet seat having a seating surface and including a metal material, a linear heating element, a metal foil that holds the linear heating element in a predetermined arrangement pattern, and a waterproof insulating foil of the metal foil And an overheat prevention device for the seating surface, and a latch for the overheat prevention device, and the metal foil sandwiching the linear heating element is laminated with a waterproof insulating foil. A heated toilet seat in which a toilet seat heater configured as described above is adhered to the back side of the seating surface, wherein the toilet seat heater forms a dense region portion of the linear heating element in the path of the arrangement pattern, and The region portion is sandwiched between the heat-sensitive portion and the locking tool of the over-temperature prevention device, and a heat insulator that suppresses heat transfer from the dense region portion to the seating portion side is provided.

  Accordingly, it is possible to configure a toilet seat heater that prevents water from entering from the outside and prevents the linear heating element from coming into contact with moisture to enhance insulation. On the other hand, the distance between the heat-sensitive part and the dense region of the overheat prevention device increases, and the problem of the temperature response delay of the overheat prevention device appears as it is.

  Therefore, the dense region portion is sandwiched between the heat sensitive portion of the overheat prevention device and the locking tool, and a heat insulator that suppresses heat transfer from the dense region portion to the seating portion side is provided, so that the dense region portion The heat transfer to the seating portion can be suppressed and the heat transfer can be concentrated to the heat sensitive portion.

  Therefore, it is possible to quickly detect an overtemperature caused by some abnormality by overcoming the problem of the temperature response delay of the overtemperature prevention device.

  In the second invention, particularly in the first invention, the dense region portion is provided in the vicinity of the outer peripheral portion of the toilet seat heater so as to be located in the toilet seat region where the user usually sits less frequently.

  As a result, the heat generated in the dense area is concentrated and transferred to the heat-sensitive part of the over-temperature prevention device. Therefore, at the position of the seat corresponding to the dense area, a normal user is seated and the thigh, buttocks There is a case where the temperature rise becomes dull with the part that contacts.

  Therefore, the dense region portion can be located at a portion far away from the seat portion that reliably contacts the user's thigh, buttocks, for example, the left and right end portions behind the toilet seat when the user is seated. .

  Therefore, by making the position corresponding to the toilet seat area where the user normally sits in this manner, when the user is seated, the user feels comfortable without feeling uncomfortable due to the difference in temperature rise speed. You can enjoy it.

  In a third aspect of the invention, particularly in the first or second aspect of the invention, the toilet seat heater holds a predetermined arrangement pattern by sandwiching a linear heating element between the first metal foil and the second metal foil. The exposed portions of the first metal foil and the second metal foil are sandwiched between the first waterproof insulating foil and the second waterproof insulating foil, and the first waterproof insulating foil and the second waterproof insulating foil are joined. This prevents flooding at the boundary.

Accordingly, the linear heating element is sandwiched between the first metal foil and the second metal foil and the predetermined arrangement pattern is held, so that the heat generated from the linear heating element is reduced to the first and second. The metal foil can be uniformly diffused.

  Then, the exposed portions of the first and second metal foils are sandwiched between the first and second waterproof insulating foils, and the water is immersed at the boundary between at least the first waterproof insulating foil and the second waterproof insulating foil. By preventing, it can prevent reliably that the metal edge part of a 1st, 2nd metal foil contacts a water | moisture content.

  In this way, a safe seat-type toilet seat heater that can maintain a uniform heat diffusion state and prevents insulation from entering the first and second metal foils from the outside to ensure insulation. Can be realized.

In a fourth aspect of the invention, in particular, in the third aspect of the invention, the first waterproof insulating foil and the second waterproof insulating foil may be any one of polyester resin foils such as polyethylene terephthalate, polyester imide, polyamide imide, and polyimide. It is what was used.

  Thereby, selection according to the actual highest use temperature of a linear heating element is possible. For example, it is possible to select polyethylene terephthalate up to about 180 ° C., polyester imide at about 200 ° C., polyamide imide or polyimide at about 250 ° C.

  In a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the overheat prevention device uses a thermostat. Thereby, when an abnormality occurs, the thermostat can be used to stop the device safely and the user can use it safely.

  In a sixth aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, the heat insulator is provided integrally with the locking tool. Thereby, a heat insulator is reliably fitted facing the heat sensitive part of an overheat prevention device via the dense region part of a toilet seat heater. Therefore, the fastener, the heat insulator, the dense region portion, and the heat sensitive portion of the overtemperature prevention device are sequentially fixed at a certain degree of adhesion and constant position, and the heat transfer state to the heat sensitive portion of the overtemperature prevention device is Can be held constant.

  In a seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, the heat insulator uses one of polyester resin foils such as polyethylene terephthalate, polyester imide, polyamide imide, and polyimide, An adhesive layer is provided on one surface.

  Thereby, like the first or second waterproof insulating foil, polyethylene terephthalate up to about 180 ° C., polyester imide at about 200 ° C., polyamide imide or polyimide at about 250 ° C. can be selected, By sticking the adhesive layer on one side to the locking tool, the heat insulator can be fixed securely. Therefore, the remaining material of the first or second waterproof insulating foil can be used, and in this case, the manufacturing cost of the heat insulator can be reduced.

  In an eighth aspect of the invention, in particular, in any one of the first to seventh aspects of the invention, the heat insulator and the locking tool are formed by molding a pre-coated metal plate, and the coated surface is brought into contact with the dense region of the toilet seat heater. It is a thing. Thereby, since the precoat part of a locking tool is mainly comprised with materials, such as resin, a heat insulator can also be formed simultaneously at the time of shape | molding a locking tool.

  Therefore, it is not only possible to reduce the manufacturing cost by eliminating the need to separately provide a heat insulator on the locking device, but it is also possible to prevent a situation such as a poor installation of the heat insulator by an operator, and to improve the reliability for thermal safety. it can.

  In the ninth aspect of the invention, particularly in the eighth aspect of the invention, the precoat metal plate uses a fluororesin-coated metal plate. Thereby, since the fluororesin-coated portion fulfills the function of a heat insulator, a heat insulator that does not change properties at all even in a relatively high temperature state of about 200 ° C. or in a corrosive environment is provided. Therefore, it is durable and has a long life, and the stability of the operating temperature of the overheat prevention device can be maintained.

  A tenth aspect of the invention includes, in particular, the toilet seat device according to any one of the first to ninth aspects and a main body. Thereby, the abnormal temperature rise which arose in the toilet seat can be detected and blocked by the temperature rise prevention device with a fast response speed, and a safe and comfortable sanitary washing device can be provided.

  Since the object of the present invention can be achieved by using the first to tenth aspects of the present invention as the main part of the embodiments, details of the embodiments corresponding to the respective claims will be described below with reference to the drawings. It will be described and the best mode for carrying out the present invention will be described. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a sectional view of a schematic configuration of a toilet seat apparatus according to Embodiment 1 of the present invention, FIG. 2 is a front view of a toilet seat heater used in the toilet seat apparatus, FIG. 3 is an exploded perspective view of the entire toilet seat, and FIG. FIG. 5 is a partially enlarged view of a region x shown in FIG. 2, FIG. 6 is a partially enlarged cross-sectional view of a linear heating element, and FIG. 7 is another linear heating element. FIG. 8 is a conceptual diagram of a control block of the toilet seat device, FIG. 9 is a front view of a toilet seat heater equipped with an overheat prevention device, and FIG. 10 is a perspective view of the overheat prevention device. 11 is a perspective view of a locking tool of the overheat prevention device, FIG. 12 is a partially enlarged sectional view of a mounting portion of the overheat prevention device, and FIG. 13 is a temperature rise characteristic diagram of the overheat prevention device and the seating surface. .

  The configuration, operation, and action of the toilet seat device according to Embodiment 1 of the present invention will be described with reference to the above drawings.

  1 to 4, a toilet seat 400 includes a toilet seat base 420 made of synthetic resin as shown in FIGS. 1 and 3, a seating surface 410U formed of a metal having high thermal conductivity such as aluminum, and a toilet seat base. The toilet seat heater 450 is interposed between the seating surface 410U and the seating surface 410U, and the toilet seat heater 450 is adhered and fixed to an inner surface portion of the seating surface 410U by an adhesive layer (not shown). The toilet seat heater 450 is equipped with a thermistor 401a for adjusting the temperature of the normal seating surface 410U.

  Further, the toilet seat heater 450 has a linear heating element 460 wired in a fixed pattern, and a part of the linear heating element 460 is composed of a thermostat having a bimetal switch (not shown) therein. A dense region portion 460c (FIGS. 1 and 2), which is a region in which the linear heating elements 460 are densely wired in order to come into contact with the heat sensitive portion 470a (FIG. 12) of the overheat prevention device 470 and concentrate heat on the heat sensitive portion 470a. ). The dense region portion 460c is provided in the vicinity of the outer peripheral portion of the toilet seat heater so as to be positioned in the toilet seat region where the user normally sits less frequently.

  On the other hand, as shown in FIG. 8, the control unit 90 of the toilet seat apparatus includes a signal input 600a from the human body detection sensor 600, a seating signal input 610a, an output from the thermistor 401a, and an overtemperature prevention device 470 between them. The energization path of the toilet seat heater 450 is connected through the via.

As shown in FIGS. 2 and 5, the linear heating element 460 is arranged in a meandering shape that meanders in the left-right direction in accordance with the shape of the seating surface 410U. The linear heating element 460 is arranged so that the meandering bent portion is positioned in the vicinity of the outer side and the inner side of the seating surface. Specifically, one continuous linear heating element 460 is divided into a first series A linear heating element 460a and a second series B linear heating element 460b, and both are arranged substantially in parallel. Has been.

  In this arrangement, since the line interval between the bent portions is short, the change in the line length of the linear heating element 460 due to thermal expansion and contraction becomes small, and the thermal stress due to thermal expansion and contraction is buffered at the bent portion. In this configuration, disconnection is suppressed. Note that the lengths La and Lb of the bent portions in the region x shown in FIG. 2 and the spacing S between the bent portions can be arbitrarily adjusted, and thereby the heating distribution of the toilet seat heater 450 can be adjusted. For example, the lengths La and Lb of the bent portions and the spacing S between the bent portions are adjusted so 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. In addition, a uniform heating temperature can be maintained in almost the entire region of the toilet seat heater 450.

  In this example, as indicated by the arrows in the drawing, the current direction in the first series A linear heating element 460a is opposite to the current direction in the first series B linear heating element 460b. The magnetic fields generated from the linear heating elements 460a and 460b tend to be canceled, and as a result, generation of noise and the like is suppressed.

  2 and 12, the seating surface 410U is formed of an aluminum plate 413 having a thickness of 1 mm, for example. On the upper and lower surfaces of the aluminum plate 413, an upper surface coating film 411 and a lower surface coating film 412 made of polyester resin having heat resistance of about 150 to 180 ° C. are formed with a thickness of about 0.05 to 0.2 mm. The dough is not exposed. In addition to the aluminum plate 413, any one or a combination of a copper plate, a stainless steel plate, an aluminum-plated steel plate, and a zinc-aluminum-plated steel plate may be used for the seating surface 410U.

  On the other hand, a toilet seat heater 450 is attached to the lower surface coating film 412 side of the seating surface 410U. The linear heating element 460 of the toilet seat heater 450 has the linear heating element 460 sandwiched between the adhesive layer 453b side of the first metal foil 453 and the non-adhesive layer 451a side of the second metal foil 451. The above meandering arrangement is held. As the first metal foil 453 and the second metal foil 451, for example, an aluminum foil having a relatively high thermal conductivity and a thickness of 0.05 mm is used. When a metal material is used, the heating performance as the toilet seat heater 450 increases.

  Further, the toilet seat heater 450 includes a metal foil unit in which a linear heating element 460 is sandwiched between a first metal foil 453 and a second metal foil 451, as a first metal foil 453 and a second metal foil 451. The upper and lower surfaces are laminated with the first waterproof insulating foil 455a and the second waterproof insulating foil 455b having dimensions larger than the dimension including the outer peripheral end A of the first waterproof insulating foil 455a and the second waterproof insulating foil. In the boundary portion P of the outer peripheral end of the first waterproof insulating foil 455a and the second waterproof insulating foil 455b joined by an adhesive layer (not shown) provided on one side of 455b, a water-inhibiting structure is completed by the adhesive layer, The sheet-type toilet seat heater 450 is configured to prevent water from entering from the outer peripheral end A of the first metal foil 453 and the second metal foil 451 that are around the foil unit.

  The first waterproof insulating foil 455a and the second waterproof insulating foil 455b of the toilet seat heater 450 are made of, for example, polyethylene terephthalate (PET), which is relatively versatile among polyester resins. Moreover, since the thickness of the first waterproof insulating foil 455a and the second waterproof insulating foil 455b requires softness for firmly sandwiching the linear heating element 460 and waterproof insulation, 0.012 to 0 .05 mm, and in this example 0.025 mm.

The material of the first waterproof insulating foil 455a and the second waterproof insulating foil 455b can be selected from materials having higher heat resistance among polyester resins depending on the operating temperature range and allowable cost of the linear heating element. It is. For example, polyesterimide (PEI) can be selected at about 200 ° C., and polyamideimide (PAI) or polyimide (PI) can be selected at about 250 ° C.

  A linear heating element 460 shown in FIG. 6 includes a heating wire 463a having a substantially 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 is made of copper or a copper alloy having a diameter of 0.16 to 0.25 mm, for example. In the present embodiment, 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. Incidentally, the resistance value is 0.88 Ω / m.

  The enamel layer 463b, which is the first insulating coating of the heating wire 463a, is made of polyester imide (PEI) having heat resistance of 180 to 250 ° C., for example. The film thickness of the enamel layer 463b is 0.02 mm or less, and is 0.01 to 0.016 mm in this embodiment.

  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. Further, when other materials such as enamel layer 463b are polyimide (PI) or polyamideimide (PAI), the heat resistance is further increased to about 300 ° C.

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

  Accordingly, a linear heating element 460 is obtained in which a double insulating layer such as an enamel layer 463b and a thin PFA layer 462 is formed on the heating line. The outer diameter remains in the range of 0.3 to 0.50 mm. In this example, the outer diameter can be about 0.35 mm. The insulation withstand voltage is ensured and the heating wire 463a is connected to the second metal foil 451 and the seating surface 410U. It is possible to conduct heat conduction very quickly.

  When enameled wire 463 with excellent heat resistance is used as a heater wire in this way, the temperature of the toilet seat can be raised in a sufficiently short time, and electrical insulation and safety can be ensured, so it can be applied to various toilet seat devices. It is.

  FIG. 7 shows another configuration example of the linear heating element 460 in which a plurality of enamel wires 463 are twisted, and each enamel wire 463 is formed as a first insulating coating on a heating wire 463a having a diameter of 0.09 mm. An enamel layer 463b having a thickness of 0.01 mm is formed. Further, a double insulation structure is similarly secured by forming a PFA layer 462 as an insulation coating layer so as to surround a bundle of a plurality of enamel wires 463.

  In FIG. 7, seven enamel wires 463 are twisted together, but the number of enamel wires 463 is not limited to seven.

  In the configuration of the linear heating element 460, by making a twisted wire obtained by twisting a plurality of enameled wires 463, thermal stress due to thermal expansion and contraction can be dispersed throughout the wire bundle, so that a situation such as disconnection is suppressed. it can. Further, by making at least one of the stranded wires an uninsulated electric wire without the enamel layer 463b, even when the enamel layer 463b of any enamel wire 463 is broken down due to local high heat or the like, the breakdown is prevented. It is possible to detect quickly and to safely cut off the power supply to the heating wire 463a.

  In FIG. 8, the toilet seat device 110 includes a main body 200, a remote control device 300, a toilet seat 400, and a human body detection sensor 600. The main body 200 includes a control unit 90, a temperature measuring unit 401, a heater driving unit 402, a toilet seat temperature adjustment lamp RA1, and a seating sensor 610. The toilet seat 400 includes a toilet seat heater 450 and a thermistor 401a.

  The control unit 90 is composed of, for example, a microcomputer, and determines the user's entrance and the temperature of the toilet seat 400, a timer function, storage of various information, and switching of energization rate for controlling the operation of the heater driving unit 402. It has the function of.

  The temperature measuring unit 401 is connected to the thermistor 401 a and measures the temperature of the toilet seat 400 based on a signal output from the thermistor 401 a, and the heater driving unit 402 is connected to the toilet seat heater 450 and drives the toilet seat heater 450.

  In this example, at the time of initial setting as a normal use state, the control unit 90 controls the heater driving unit 402, so that the toilet seat 400 is temperature-adjusted to, for example, about 18 ° C. as a standby temperature. In the control unit 90, the user's entry into the toilet room is detected by the entry detection signal 600a from the human body detection sensor 600. Subsequently, the control unit 90 selects a predetermined heater control pattern based on the measured temperature value of the toilet seat 400 and the toilet seat set temperature, and the toilet drive heater 450 is driven by the heater driving unit 402, so that the temperature of the toilet seat 400 is set to the toilet seat setting. Instantly warms to temperature. Therefore, comfortable use is possible without feeling cold when the user sits on the toilet seat 400.

  Next, in FIGS. 2 and 9 to 12, a dense region portion 460 c in which the linear heating element 460 meanders at a high density is formed on one side of the rear portion of the toilet seat heater 450, and a bimetal switch (not shown) is formed in the dense region portion 460 c. ) Is mounted, which is a thermostat device 470 comprising a thermostat with a built-in). There are two types of thermostats: a reset type and a non-reset type. When the reset type is used, it is desirable to separately install a non-reset type overheat prevention device in the energization path to which the thermostat is connected.

  In this example, the thermostat has a configuration in which a return type is used as an example, and a thermal fuse (not shown) is installed in the toilet seat heater 450 as a non-reset type overheat prevention device. In the over-temperature prevention device 470, the heat-sensitive portion 470a is formed of a substantially circular can-like heat good conductor. The heat-sensitive portion 470a is fitted with a fixing flange 470b made of a metal having good heat conductivity such as aluminum so as to surround the periphery thereof, and the heat-sensitive portion 470a and the fixing flange 470b are in close contact with the dense region portion 460c. .

  The heat-sensitive portion 470a and the dense region portion 460c are provided on the locking device 480 while sandwiching the dense region portion 460c between the locking device 480 on the seating surface 410U side and the fixing flange 470b of the overtemperature preventing device 470. After the two cylindrical burring portions 480a are aligned with the corresponding positioning holes 470c of the fixing flange 470b, the burring portions 480a are fitted to ensure a close contact state.

At this time, a heat insulator 490 made of polyethylene terephthalate (PET) resin foil provided with an adhesive layer (not shown) on one side is provided at the center of the surface of the locking member 480 on the dense region portion 460c side. It is stuck down. Incidentally, as for the thickness of the heat insulating body 490, about 0.1 mm is easy to stick. From the viewpoint of reducing the material cost, the remaining material of either the first waterproof insulating foil 455a or the second waterproof insulating foil 455b can be used as the material of the heat insulator 490.

  Further, by interposing a heat conduction auxiliary material such as heat conduction promoting grease or a heat conduction promoting sheet between the dense region portion 460c and the heat sensitive portion 470a, the amount of heat received by the heat sensitive portion 470a can be further increased. is there. In this example, silicon-based thermal conductive grease 495 having a thermal conductivity of 0.8 to 1 W / m · K is used.

  In this example, aluminum or an aluminum alloy is used as the material of the heat-sensitive portion 470a and the fixing flange 470b. However, it is also possible to use a heat conductive metal such as copper or a copper alloy. In that case, since a situation of moisture mixing is also assumed, the heat sensitive part 470a and the fixing flange 470b are substantially the same material or a material with a relatively close ionization tendency from the viewpoint of preventing galvanic corrosion that is likely to occur at the contact part of different metals. It is desirable to use

  In general, since the heated toilet seat 100 is seated with its skin in direct contact with the seating surface 410U, sufficient consideration is necessary for safety. Although it can be used safely and comfortably in normal use, if a malfunction occurs in the control unit 90 due to some abnormality and the energization control to the toilet seat heater 450 becomes impossible, an immediate operation of the safety device is necessary. The overheat prevention device 470 in this example operates as described below.

  FIG. 13 is a result of measuring the detected temperature of the overheat prevention device 470 and the surface temperature of the seating surface 410U when the linear heating element 460 is energized on the assumption that the control unit 90 has failed. In FIG. 13, curves (A) and (A ′) are the surface temperature of the seating surface 12, and curves (B) and (B ′) are the detected temperatures of the overheat prevention device 470.

  When energization of the linear heating element 460 is started, the surface temperature of the seating surface 410U reaches the toilet seat maximum set temperature (T1) at time t1. Normally, energization is stopped by a command from the control unit 90 when reaching (T1), but if any abnormality occurs, the energization is continued as it is.

  If the OFF operating temperature of the over-temperature prevention device 470 is set to (T3), the surface temperature of the seating surface 410U is equal to or higher than the toilet seat maximum set temperature (T1), and it can be determined that the temperature is abnormally reliably increased ( When T2) is reached, the bimetal switch inside the overheat prevention device 470 reverses and cuts off the energization to the linear heating element 460.

  At this time, the temperature of the seating surface 410U and the overheat prevention device 470 continues to overheat for (t2-t1) seconds due to the thermal diffusion action on the seating surface 410U. Here, it is very difficult to set the OFF operation temperature of the over-temperature prevention device 470 to the crossing 0 in consideration of manufacturing and cost, and the tolerance is generally ± 2 ° C. . That is, when the tolerance is taken into consideration, the OFF operation temperature of the overheat prevention device 470 is (T3) to (T3 + 4).

  If the OFF operation temperature is (T3 + 4), the curves of the temperature of the seating surface 410U and the detected temperature of the overheat prevention device 470 are (A ′) and (B ′), and the overtemperature prevention device 470 is turned on at time t3. Operates and the energizing circuit is shut off. In this case, the overheating is continued for (t3-t1) seconds. That is, in consideration of the variation in the OFF operation temperature of the overheat prevention device 470, the time for overheating is the shortest (t2-t1) seconds and the longest (t3-t1) seconds.

In consideration of safety, the circuit must be shut off as quickly as possible when the temperature rises excessively.
Therefore, the time (t3−t1) can be shortened by increasing the slope of the curve (B), that is, by increasing the temperature response speed of the overheat prevention device 470, and the temperature of the seating surface 410U can be reduced. Before the temperature rises excessively, the energization circuit to the linear heating element 460 can be cut off, and can be used safely and safely even in the unlikely event.

  As described above, in the present invention, the first waterproof insulating foil 455a and the second waterproof insulating foil 455b having dimensions larger than the outer dimensions of the metal foil unit of the toilet seat heater 450 are used to form the metal foil unit of the toilet seat heater 450. Since the upper and lower surfaces are laminated to prevent inundation from the surroundings, the toilet seat heater 450 with enhanced insulation by preventing infiltration from the outside to the metal foil unit of the inner toilet seat heater 450 can be configured. In the configuration as it is, the distance between the heat-sensitive portion 470a and the dense region portion 460c of the overheat prevention device 470 is increased, and there is a problem that the temperature response of the overheat prevention device 470 is delayed.

  Therefore, the heat transfer from the dense region portion 460c to the seating surface 410U is suppressed by providing the heat insulator 490 so as to stick to the fastener 480 between the latch 480 and the dense region portion 460c. On the contrary, the heat transfer can be concentrated on the heat sensitive part 470a.

  Therefore, it is possible to overcome the problem such as the temperature response delay of the overtemperature prevention device 470 described above, quickly detect the overtemperature caused by some abnormality, and cut off the energization. In this way, it is possible to provide the toilet seat device 110 using the toilet seat heater 450 that can ensure both electrical safety such as ensuring insulation and thermal safety such as prevention of high temperature on the seating surface even in situations such as flooding. it can.

(Embodiment 2)
FIG. 14 is a perspective view of a locking tool according to Embodiment 2 of the present invention, and FIG. 15 is a partially enlarged cross-sectional view of a mounting portion of the overheat prevention device. This embodiment is basically the same as the configuration shown in FIGS. 1 to 13 in the first embodiment, and in FIGS. 14 and 15, the same reference numerals as those in the first embodiment have the same structure. Then, the configuration, operation, and action of the mounting portion of the toilet seat heater overheat prevention device will be described focusing on the differences from the first embodiment.

  14 and 15, the difference from the first embodiment is that the locking tool 485 and the heat insulator 490 are formed by molding a precoated metal plate 487 made of a fluororesin-coated aluminum plate, and the precoated surface is a toilet seat heater. 450 is brought into contact with the dense region portion 460c.

  Thus, as in the first embodiment, the heat transfer from the dense region portion 460c to the seating surface 410U is suppressed by the action of the heat insulator 490 of the pre-coated metal plate 487, which is the locking tool 485, and heat is transferred to the heat sensitive portion 470a. The movement can be centralized, and the temperature rise caused by some abnormality can be detected quickly, and the energization can be cut off.

  Therefore, similarly, it is possible to provide the toilet seat device 110 using the toilet seat heater 450 that can ensure both electrical safety, such as ensuring insulation, and thermal safety, such as prevention of high temperature on the seating surface, even in situations such as flooding. it can.

  In addition, since the fluororesin-coated portion of the locking tool 485 functions as a heat insulator 490, it has a heat insulator 490 that does not change its properties even at a relatively high temperature of about 200 ° C. or in a corrosive environment. It becomes.

  This embodiment can also be applied to the invention of Embodiment 1.

(Embodiment 3)
FIG. 16 is an external perspective view showing a sanitary washing device according to Embodiment 3 of the present invention, and includes any one of the toilet seat devices shown in Embodiments 1 and 2.

  In FIG. 16, the sanitary washing device 900 installed in the toilet room is attached to the upper surface of the toilet bowl 700. The sanitary washing device 800 includes a main body 200, a remote operation device 300, a toilet seat 400, and a lid 500.

  The toilet seat 400 includes any one of the toilet seat devices shown in the first and second embodiments, and the toilet seat 400 and the lid portion 500 are attached to the main body 200 so as to be openable and closable. The main body 200 is provided with a cleaning device 800 that enters and exits the toilet 700 and a cleaning water supply mechanism (not shown), and a control unit 90 (FIG. 8) is built therein.

  When the user enters the toilet room, the human body detection sensor 600 (for example, a reflective infrared sensor) detects the infrared light reflected from the human body and detects the user's room entry. At that time, as described in the first embodiment, the seating surface 410U of the toilet seat 400 rapidly rises to a temperature at which the user does not feel cold, for example, within 6 seconds.

  Next, when the user is seated on the seating surface 410U, a seating sensor 610 (for example, a reflective infrared sensor) provided on the front upper portion of the main body 200 detects infrared rays reflected from the human body, and thereby the toilet seat 400 is placed on the toilet seat 400. Detecting the presence of the user, the seating surface 410U is held at an appropriate temperature that allows comfortable seating.

  When the user operates the remote control device 300 after the stool is finished and sends a cleaning instruction as a signal to the main body 200, the cleaning device 800 directly connected to the cleaning water supply mechanism connected to the water pipe (not shown). Protrudes and washing water (arrow) spouts from the vicinity of the tip to wash the user's local area. Further, when the user operates the remote control device 300 after the cleaning is completed and sends a cleaning stop signal to the main body 200, the cleaning device 900 is accommodated in the main body 200. Finally, the user stands up from the seating surface 410U and leaves the toilet room.

  The sanitary washing device 800 of the toilet seat device is an outline during normal use. When a user sits on the seating surface 410U, some abnormality occurs in the control unit 90 as described in the first embodiment, and the toilet seat In the case where energization to the heater 450 is continued without stopping at a constant temperature, the overheat prevention device 470, the dense region portion 460c of the toilet seat heater 450, and the heat insulator 490 provided integrally with the locking tool 480. As a result, the overheat prevention device 470 operates quickly, and safety for the user can be ensured.

  Furthermore, even if water is generated inside the toilet seat 400 during a user's stool process, it is possible to prevent water from entering the toilet seat heater 450 and to ensure and maintain electrical insulation and thermal safety at the same time. A possible sanitary washing device is obtained.

  As described above, the toilet seat device of the present invention overcomes the temperature response delay of the overheat prevention device of the toilet seat heater that has been strengthened by preventing inundation from the outside, thereby ensuring electrical safety such as ensuring insulation. Therefore, it can be applied as a general-purpose safety mechanism technology for heating equipment that is not limited to a toilet seat device and that requires user contact.

Sectional drawing of schematic structure of the toilet seat apparatus in Embodiment 1 of this invention Front view of toilet seat heater in the first embodiment The exploded perspective view of the whole toilet seat in Embodiment 1 The state figure which stuck the toilet seat heater in Embodiment 1 on the seating surface Partial enlargement of the region x shown in FIG. 2 of the toilet seat heater in the first embodiment Partial expanded sectional view of the linear heating element in Embodiment 1 Partial expanded sectional view of the other example of the linear heating element in Embodiment 1 The conceptual diagram of the control block of the toilet seat apparatus in Embodiment 1 Front view of a toilet seat heater equipped with the over-temperature prevention device according to the first embodiment The perspective view of the overheating prevention apparatus in the same Embodiment 1 The perspective view of the locking tool of the overheat prevention device in Embodiment 1 The expanded sectional view of the mounting part of the overheat prevention device in Embodiment 1 Temperature rise characteristic diagram of overheat prevention device and seating portion in the first embodiment The perspective view of the locking tool of the overheat prevention device in Embodiment 2 of this invention The expanded sectional view of the mounting part of the overheat prevention device in Embodiment 2 External appearance perspective view which shows the sanitary washing apparatus in Embodiment 3 of this invention. Sectional drawing of the principal part of the conventional toilet seat apparatus

DESCRIPTION OF SYMBOLS 110 Toilet seat apparatus 200 Main body part 400 Toilet seat 410U Seating surface 450 Toilet seat heater 451 Second metal foil 453 First metal foil 455a First waterproof insulating foil 455b Second waterproof insulating foil 460 Linear heating element 460c Dense region part 470 Overheat prevention device (thermostat)
470a Heat-sensitive part 480, 485 Locking tool 487 Pre-coated metal plate 490, 495 Heat insulator 900 Sanitary washing device

Claims (10)

A toilet seat including a metal material, a linear heating element, a metal foil that holds the linear heating element in a predetermined arrangement pattern, a waterproof insulating foil of the metal foil, and a heat-sensitive part. And a toilet seat heater comprising a laminate of the metal foil sandwiching the linear heating element with a waterproof insulating foil, the apparatus comprising: an overheat prevention device for the seating surface; and a locking device for the overheat prevention device. Is attached to the back side of the seating surface, and the toilet seat heater forms a dense region portion of the linear heating element in the path of the arrangement pattern, and the dense region portion is overheated. The toilet seat apparatus which provided the heat insulating body which suppresses the heat transfer from the said dense area part to the seating part side while being pinched | interposed by the heat-sensitive part and locking tool of a prevention apparatus. The toilet seat device according to claim 1, wherein the dense region portion is provided in the vicinity of the outer peripheral portion of the toilet seat heater so as to be positioned in a region where the user is normally seated less frequently. The toilet seat heater holds a predetermined arrangement pattern by sandwiching a linear heating element between the first metal foil and the second metal foil, and exposes the exposed portions of the first metal foil and the second metal foil. The first waterproof insulating foil and the second waterproof insulating foil are sandwiched between the first waterproof insulating foil and the first waterproof insulating foil and the second waterproof insulating foil to prevent inundation at the joined portion. Toilet seat device. The toilet seat device according to claim 3, wherein the first waterproof insulating foil and the second waterproof insulating foil are made of polyester resin foil such as polyethylene terephthalate, polyester imide, polyamide imide, and polyimide. The toilet seat device according to any one of claims 1 to 4, wherein the overheat prevention device uses a thermostat. The toilet seat device according to any one of claims 1 to 5, wherein the heat insulator is provided integrally with the locking tool. The heat insulator according to any one of claims 1 to 6, wherein one of polyester resin foils such as polyethylene terephthalate, polyester imide, polyamide imide, and polyimide is used, and an adhesive layer is provided on one surface. The toilet seat device described. The toilet seat device according to any one of claims 1 to 7, wherein the heat insulator and the locking member are formed by molding a pre-coated metal plate, and the coated surface is brought into contact with a dense region portion of the toilet seat heater. The toilet seat device according to claim 8, wherein the precoat metal plate is a fluororesin-coated metal plate. The sanitary washing apparatus provided with the toilet seat apparatus of any one of Claim 1 to 9, and a main-body part.

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