JP4821695B2 - Toilet seat device and sanitary washing device using the same - Google Patents

Description

  The present invention relates to a mounting structure for an overheat prevention device for a toilet seat device.

  Conventionally, as a mounting structure of an overtemperature prevention device for a toilet seat device using this type of high-capacity heating element, a planar heating element unit is installed in close contact with the back surface of the toilet seat, and a part of the heating element unit is installed. A configuration is described in which a heat insulating portion is formed by providing a gap between the heat sink and the toilet seat, and a thermostat is installed in the heat insulating portion as an overtemperature preventing device to detect an abnormal temperature rise of the heating element unit. Moreover, the structure which interposed the heat insulating material in the said gap | interval is described (for example, refer patent document 1).

FIG. 32 shows a conventional toilet seat device described in Patent Document 1. In FIG. As shown in FIG. 32, a planar heating element unit 2 is installed on the back surface of the metal seating portion 1 of the toilet seat, and a heat insulating portion 4 is formed by providing a gap 3 in a part thereof. A thermostat 5 is installed on the surface.
JP 2005-192896 A

  However, in the conventional configuration, the thermostat is installed in the heat insulating portion that is not affected by the temperature of the seating portion, and the thermostat is operated only by the temperature rise of the heating element unit, and the actual temperature of the seating portion is Will work almost independently. Therefore, when the seating portion is at a normal use temperature or lower, the thermostat may malfunction, and the temperature at which the seating portion is seated may not be optimal. In addition, the seating portion, which is a heat insulating portion, is difficult to transmit heat from the heating element unit, and is a cold point, so that the seated user is uncomfortable.

  The present invention solves the conventional problems, and provides a safe and comfortable toilet seat device by accurately operating the over-temperature prevention device by detecting the temperature rise of both the seating portion and the heating element. With the goal.

  In order to solve the above-described conventional problems, the toilet seat device of the present invention includes a toilet seat including a metal material, a toilet seat heater provided on the toilet seat, and a thermostat, and the thermostat is sandwiched between the heater holder and the thermostat holder. It is fixed in close contact with.

  As a result, the toilet seat heater and the thermostat are securely fixed in close contact with each other, and secular change and thermal change are unlikely to occur, and high performance as an overheat prevention device can be stably exhibited over a long period of time.

  Since the toilet seat device of the present invention can stably maintain the performance of the overheat prevention device for a long period of time, it can improve safety and reliability.

The first invention comprises a toilet seat having a seating surface and containing a metal material, a toilet seat heater provided in close contact with the back surface of the seating surface of the toilet seat, and a thermostat for preventing the toilet seat heater from being excessively raised, The toilet seat heater has a configuration in which a linear heater provided with an insulating coating layer is disposed between two metal foils in a predetermined arrangement pattern, and the thermostat is a heater holder disposed on the seating surface side of the toilet seat heater Since the toilet seat heater and the thermostat are mechanically sandwiched between the heater holder and the thermostat holder, the toilet seat heater and the thermostat are clamped by the thermostat holder disposed on the other surface side. The thermostat is securely fixed in close contact with each other, and it is difficult for secular change and thermal change to occur, and the high performance as an overheat prevention device can be stably exhibited over a long period of time. Further, since heat is transmitted to the seating surface in the thermostat mounting portion, there is no occurrence of a cold point, and the seating surface can be turned on in a comfortable state.

  According to a second aspect of the present invention, particularly in the first aspect of the invention, the heater holder includes a plurality of fixing protrusions provided at intervals, and the thermostat holder includes a fixing hole corresponding to the fixing protrusion and a thermostat holding part, and a toilet seat heater Includes a through hole corresponding to the fixed protrusion, the fixed protrusion is inserted into the through hole and the fixed hole, and the tip of the fixed protrusion is deformed and fixed, thereby fixing the thermostat with the heater holder. It is possible to perform with the minimum necessary parts of the thermostat holder, and it is possible to suppress the unnecessary transfer or heat dissipation of the toilet seat heater, so accurate temperature detection is possible and as an overtemperature prevention device Can improve the accuracy.

  According to a third aspect of the invention, in particular, in the second aspect of the invention, the end face of the through hole of the toilet seat heater is waterproofed to prevent leakage or electric shock from the charging part inside the toilet seat heater with water that has entered through the through hole. Therefore, the waterproofness and safety of the toilet seat device can be improved.

  In a fourth aspect of the present invention, in particular, in any one of the first to third aspects, the thermostat of the toilet seat heater is arranged by arranging the arrangement pattern of the linear heater with a higher density than the other areas. Because the temperature of the thermostat installation part rises faster than other areas, it becomes possible to detect abnormal temperature rises earlier than other areas, and it is possible to improve the sensitivity and accuracy as an overtemperature prevention device, The safety and reliability of the toilet seat device can be improved.

  The fifth aspect of the present invention, in particular, includes the toilet seat device of any one of the first to fourth aspects, the cleaning device, the linear water supply mechanism, and the toilet lid, thereby reliably increasing the abnormal temperature of the toilet seat device. Therefore, it is possible to provide a sanitary washing device with high safety and reliability.

  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.

<1> Appearance of sanitary washing device and toilet device including the same FIG. 1 is an external perspective view showing a toilet seat device and a sanitary washing device including the toilet seat device according to the first embodiment of the present invention. The sanitary washing device is installed in the toilet room.

  The sanitary washing device 100 is attached to the upper surface of the toilet bowl 700. The sanitary washing device 100 includes a main body 200, a remote operation device 300, a toilet seat 400 and a lid 500. Each component of the sanitary washing device 100 excluding the lid 500 constitutes a toilet seat device 110 described later.

  A toilet seat 400 and a lid 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 and a cleaning water supply mechanism (not shown), and a control unit 90 (FIG. 3) described later is built in.

  In FIG. 1, a seating sensor 610 provided in the upper front portion of the main body 200 is shown. The seating sensor 610 is, for example, a reflective infrared sensor. In this case, the seating sensor 610 detects the presence of a user on the toilet seat 400 by detecting infrared rays reflected from the human body.

  Further, FIG. 1 shows a state in which the toilet nozzle 40 of the cleaning device provided in the lower front portion of the main body 200 protrudes inside the toilet 700. The toilet nozzle 40 is connected to the above-described washing water supply mechanism.

  The washing water supply mechanism is connected to a water pipe (not shown). Accordingly, the cleaning water supply mechanism supplies the cleaning water supplied from the water pipe to the toilet nozzle 40. Thereby, washing water is ejected from the toilet nozzle 40 to a wide area on the inner surface of the toilet 700 (toilet bowl pre-washing). Alternatively, washing water is ejected from the toilet nozzle 40 to the back side of the inner surface of the toilet 700 (toilet rear cleaning). Details will be described later.

  The washing water supply mechanism is connected to the bottom washing nozzle, the bidet washing nozzle, and the nozzle washing jet outlet of the washing apparatus (not shown) via a switching valve. Accordingly, the cleaning water supply mechanism converts the cleaning water supplied from the water pipe into warm water by the heating means and supplies it to each nozzle. Thereby, a user's local part is washed with the warm water spouted from the butt washing nozzle and the bidet washing nozzle. Further, the cleaning water is ejected from the nozzle cleaning outlet and the butt cleaning nozzle and the bidet cleaning nozzle are self-cleaned.

  The remote operation device 300 is provided with a plurality of switches. The remote control device 300 is attached to a place where a user sitting on the toilet seat 400 can operate, for example.

  The entrance detection sensor 600 is attached to an entrance of a toilet room or the like. The entrance detection sensor 600 is, for example, a reflective infrared sensor. In this case, the entrance detection sensor 600 detects that the user has entered the toilet room when detecting infrared rays reflected from the human body.

  The control unit 90 (FIG. 3) of the main body 200 controls the operation of each part of the sanitary washing device 100 based on signals transmitted from the remote operation device 300, the room entry detection sensor 600 and the seating sensor 610.

<2> Configuration of Remote Operation Device FIG. 2 is a front view of the remote operation device 300 of FIG. The remote operation device 300 has a structure in which a controller lid 302 is provided at the bottom of the controller main body 301 so as to be freely opened and closed.

  As shown in FIG. 2A, a drying switch 320, strength adjustment switches 322 and 323, and position adjustment switches 325 and 326 are provided on the top of the controller main body 301 with the controller lid 302 closed. The controller lid 302 is provided with a stop switch 311, a butt switch 312 and a bidet switch 313.

  The above switches are operated by the user. Thereby, a predetermined signal corresponding to each switch is wirelessly transmitted from the remote operation device 300 to the main body 200 of FIG. The control unit 90 (FIG. 3) of the main body 200 controls the operation of each component of the main body 200 (FIG. 1) and the toilet seat 400 (FIG. 1) based on the received signal.

  For example, when the user operates the buttocks switch 312 or the bidet switch 313, cleaning water is ejected from a nozzle unit 20 (FIG. 3), which will be described later, to the user's local area. Further, when the user operates the stop switch 311, the ejection of the washing water from the nozzle unit 20 to the user's local part is stopped.

  When the user operates the drying switch 320, hot air is jetted from a drying unit 210 (FIG. 64), which will be described later, to the user's local area. Further, when the user operates the strength adjustment switches 322 and 323, the flow rate, pressure, and the like of the cleaning water sprayed to the local area of the user are adjusted.

  Further, when the user operates the position adjustment switches 325 and 326, the position of the posterior nozzle 21 (FIG. 3) described later or the bidet nozzle 22 (FIG. 3) described later is adjusted. Thereby, the ejection position of the washing water to the user's local area is adjusted.

  FIG. 2B shows a front view of the remote operation device 300 in a state where the controller lid 302 is opened. As shown in FIG. 2B, in addition to the stop switch 311, the butt switch 312, and the bidet switch 313, an automatic opening / closing switch 331, a water temperature adjustment is provided below the controller body 301 covered by the controller lid 302. A switch 332, a toilet seat temperature adjustment switch 333, a sterilization switch 335, and a toilet flushing switch 336 are provided.

  Even when these switches are operated, a predetermined signal corresponding to each switch is wirelessly transmitted from the remote operation device 300 to the main body 200. Thereby, the control part 90 of the main-body part 200 controls operation | movement of each structure part of the main-body part 200 and the toilet seat part 400 based on the received signal.

  The automatic opening / closing switch 331 is constituted by a knob. When the user operates the knob of the automatic opening / closing switch 331, the opening / closing operation of the lid 500 (FIG. 1) is set. That is, when the knob of the automatic opening / closing switch 331 is in the on position, the lid 500 is opened / closed in response to the user entering the toilet room.

  When the user operates the water temperature adjustment switch 332, the temperature of the cleaning water ejected from the nozzle unit 20 to the user's local part is adjusted. When the user operates the toilet seat temperature adjustment switch 333, the temperature of the toilet seat 400 is adjusted.

  Further, when the user operates the sterilization switch 335, the cleaning water containing silver ions flows into the cleaning water supply mechanism of the main body 200, and the sterilization operation is performed.

  Similar to the automatic opening / closing switch 331, the toilet flushing switch 336 is constituted by a knob. When the user operates the knob of the toilet flushing switch 336, the operation of the toilet pre-washing and the toilet rear washing by the toilet nozzle 40 is set.

  In other words, when the knob of the toilet flushing switch 336 is in the ON position, flush water is ejected from the toilet nozzle 40 to a wide area inside the toilet 700 according to the user entering the toilet room. In addition, washing water is jetted from the toilet nozzle 40 to the back side of the inner surface of the toilet 700 while the user is seated on the toilet seat 400.

<3> Toilet Seat Device (3-a) Configuration of Toilet Seat Device FIG. 3 is a schematic diagram illustrating the configuration of the toilet seat device 110. As described above, the toilet seat device 110 includes the main body 200, the remote control device 300, the toilet seat 400, and the entrance detection sensor 600.

  As shown in FIG. 3, the main body 200 includes a control unit 90, a temperature measurement unit 401, a heater driving unit 402, a toilet seat temperature adjustment lamp RA <b> 1, 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 includes a determination unit that determines the user's entrance and the temperature of the toilet seat 400, a timer unit having a timer function, a storage unit that stores various information, and a heater driving unit 402. Including an energization rate switching circuit for controlling the operation.

  The temperature measuring unit 401 of the main body 200 is connected to the thermistor 401 a of the toilet seat 400. Thereby, the temperature measurement part 401 measures the temperature of the toilet seat part 400 based on the signal output from the thermistor 401a. Hereinafter, the temperature of the toilet seat 400 measured by the temperature measuring unit 401 through the thermistor 401a is referred to as a measured temperature value.

  Further, the heater driving unit 402 of the main body 200 is connected to the toilet seat heater 450 of the toilet seat 400. As a result, the heater driving unit 402 drives the toilet seat heater 450.

  In the present embodiment, toilet seat device 110 operates as follows. At the time of initial setting, the temperature of the toilet seat 400 is adjusted to about 18 ° C., for example, by the control unit 90 controlling the heater driving unit 402. The temperature at this time is referred to as a standby temperature.

  Here, when the user operates the toilet seat temperature adjustment switch 333 of the remote control device 300, the toilet seat set temperature is transmitted to the control unit 90. The control unit 90 stores the toilet seat set temperature received from the remote operation device 300 in the storage unit.

  When the user enters the toilet room, the entry detection sensor 600 detects the entry of the user. As a result, a user entry detection signal is transmitted to the control unit 90.

  Next, the operation during normal use will be described. The determination unit of the control unit 90 detects the user's entry into the toilet room based on the entry detection signal from the entry detection sensor 600. Therefore, the determination unit selects a specific heater control pattern related to driving of the toilet seat heater 450 based on the measured temperature value of the toilet seat unit 400 and the toilet seat set temperature stored in the storage unit.

  The energization rate switching circuit controls the operation of the heater driving unit 402 based on the selected heater control pattern and time information obtained by the time measuring unit.

  Accordingly, the toilet seat heater 450 is driven by the heater driving unit 402, and the temperature of the toilet seat 400 is instantaneously increased to the toilet seat set temperature.

(3-b) First Example of Toilet Seat 400 FIG. 4 is an exploded perspective view of the toilet seat 400. FIG. FIG. 5A is a plan view of the toilet seat heater 450 of the toilet seat 400 of the first example, and FIG. 5B is an enlarged view of a region C72 of FIG. 5A. FIG. 6 is a plan view of the toilet seat 400 of the first example. 7 is a C73-C73 cross-sectional view of the toilet seat 400 of FIG.

  As shown in FIG. 4, the toilet seat 400 includes a substantially elliptical upper toilet seat casing 410 formed mainly of aluminum, a substantially horseshoe-shaped toilet seat heater 450, and a substantially elliptical lower toilet seat casing 420 formed of synthetic resin. Prepare.

  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 of the toilet seat 400.

  As shown in FIGS. 5A and 6, 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 may have a substantially oval shape. The toilet seat heater 450 includes metal foils 451 and 453 made of, for example, aluminum and a linear heater 460.

  The linear heater 460 is disposed in a meandering manner in accordance with the shape of the upper toilet seat casing 410 in the region from the seat center portion SE3 to the seat one end portion SE1 and in the region from the seat center portion SE3 to the seat other end portion SE2. .

  Specifically, the linear heater 460 is formed to have U-shaped portions of about six rows on the left and right. These U-shaped parts are arranged in parallel substantially along the direction of the thigh of the seated user. The interval between the linear heaters 460 in each U-shaped portion is about 5 mm.

  The heater start end portion 460 a and the heater end portion 460 b 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.

  Further, as shown in FIG. 5B, a plurality of bent portions CU serving as thermal stress buffering portions are provided in the path of the meandering linear heater 460.

  As shown in FIG. 7, the distance ds1 between the linear heaters 460 in the region G1 along the outer side of the upper toilet seat casing 410 and the distance ds3 between the linear heaters 460 in the region G3 along the inner side are It is set to be smaller than the distance ds2 between the linear heaters 460 in the central region G2 of the toilet seat casing 410. Thereby, in the area | region G1 along the outer side edge of the upper toilet seat casing 410, and the area | region G3 along the inner side edge, the linear heaters 460 are arranged densely compared with the area | region G2 of a center part.

(3-c) Second Example of Toilet Seat 400 FIG. 8A is a plan view of the toilet seat heater 450 of the toilet seat 400 of the second example, and FIG. 8B is the region of FIG. FIG. 9 is an enlarged view of C77, and FIG. 9 is a plan view of the toilet seat 400 of the second example.

  As shown in FIG. 8A and FIG. 9, the linear heater 460 has an upper toilet seat casing in the region from the seat center portion SE3 to the seat one end portion SE1 and in the region from the seat center portion SE3 to the seat other end portion SE2. It is arranged in a meandering shape that meanders in the left-right direction according to the shape of 410. In this example, the linear heater 460 is disposed so 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 linear heater 460 extends from one side of the rear portion of the toilet seat heater 450 to the vicinity of the seat one end portion SE1 while moving to the left and right, thereby forming the first series A meandering shape of FIG. Is done. Further, the linear heater 460 meanders from the vicinity of the sheet one end part SE1 to the left and right while extending to the vicinity of the sheet other end part SE2 through the vicinity of the sheet center part SE3, thereby forming the second series B meandering shape. Is done. Further, the linear heater 460 extends from the vicinity of the seat other end portion SE2 to the one side of the rear portion of the toilet seat heater 450 through the vicinity of the seat center portion SE3, thereby forming a first series A meandering shape.

  Further, as shown in FIG. 8B, the first series A meandering linear heater 460 and the second series B meandering linear heater 460 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 disposed on the toilet seat portion 40.
0 is connected to a lead wire 470 drawn from one side of the rear part.

  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.

  Moreover, 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, as shown in FIG.8 (b), the length La of a bending part, Lb, and the space | interval S between bending parts can be adjusted arbitrarily. 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. To do. Thereby, the uniform heating temperature can be maintained in the entire region of the toilet seat heater 450.

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

(3-d) Third Example of Toilet Seat 400 FIG. 10A is a plan view of the toilet seat heater 450 of the toilet seat 400 of the third example, and FIG. 11 shows the toilet seat heater 450 as an overtemperature prevention device. FIG. 12 is an exploded perspective view showing the mounting structure of the thermostat 450Q, FIG. 13 is a cross-sectional view showing the mounting structure of the thermostat 450Q, and FIG. 14 is another mounting of the thermostat 450Q. FIG. 16 is an exploded perspective view showing another mounting structure of the thermostat 450Q, and FIG. 16 is a cross-sectional view showing the mounting structure of the thermal fuse 450R.

  As shown in FIG. 10, temperature measuring portions 450 </ b> T in which the linear heaters 460 meander at high density are formed on both sides of the rear portion of the toilet seat heater 450. As shown in FIG. 11, one thermometer 450T is provided with a return thermostat 450Q using a bimetal or the like as an excessive rise prevention device. The other temperature detecting section 450T is provided with a temperature fuse 450R as a non-return type overheating prevention device.

  As shown in FIG. 11, the return-type thermostat 450 </ b> Q is installed on the surface of one temperature measuring unit 450 </ b> T of the toilet seat heater 450.

  As shown in FIG. 12, through holes 450U are provided at predetermined intervals on both sides of the temperature detector 450T of the toilet seat heater 450.

A heater holder 490 is installed on the back surface side of the toilet seat heater 450 (the seating portion 410 side of the toilet seat 400). The heater holder 490 is formed by processing an aluminum plate having a thickness of 0.3 to 0.5 mm, and fixing protrusions 490a are provided on both sides thereof at the same interval as the arrangement pitch of the through holes 450U of the toilet seat heater 450. It is. The fixing protrusion 490a is integrally formed by cutting and raising an aluminum plate of the heater holder 490 into a cylindrical shape having a 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.

  An annular waterproof sheet 492 in which a heat-resistant resin sheet is coated with an adhesive is installed on both sides of the through-hole 450U of the toilet seat heater 450. The mounting hole 492a of the waterproof sheet 492 is slightly smaller than the diameter of the through hole 450U of the toilet seat heater 450, and the outer shape of the waterproof sheet 492 is larger than the diameter of the through hole 45U. In the present embodiment, the diameter of the through hole 450U of the toilet seat heater 450 is 13 mm, the mounting hole of the waterproof sheet 492 is 6.5 mm in diameter, and the outer diameter is 20 mm.

  Adhering the waterproof sheet 492 from above and below the toilet seat heater 450 by taking such a dimensional relationship can prevent the end face of the through hole 450U of the toilet seat heater 450 from being exposed. It is desirable that the mounting hole 492a of the waterproof sheet 492 is smaller in diameter by 6 mm or more 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. Further, the outer dimension of the waterproof sheet 492 with respect to the through-hole 450U is also required to be at least 3 mm as an adhesion allowance, and an adhesion allowance of 5 mm or more is desirable in view of stable mass production.

  As a reason why such waterproofing is necessary, it is general that water may adhere to the toilet seat 400. In addition, when the insulating performance of the toilet seat heater 450 deteriorates due to local heat generation, electricity flows through the metal foils 451 and 453. If the metal foils 451 and 453 are connected to the surface of the seating portion 410 of the toilet seat 400 by water, and further touched by a human body, there is a risk of electric shock. The surfaces of the metal foils 451 and 453 can be solved by coating and laminating a resin layer, but it is very difficult to waterproof the exposed metal portion on the end face. Therefore, this problem can be avoided by disposing an insulating waterproof sheet 492.

  The thermostat holder 491 for holding the thermostat 450Q is formed by pressing an aluminum plate or the like, and has a circular hole thermostat holder 491a for holding the thermostat 450Q at the center, and fixing holes 491b on both sides thereof. Is provided. 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 heat sensitive portion at the tip, and the fixing hole 491b has the same pitch as the fixing protrusion 490a of the heater holder 490. The fixing protrusion 490a is of a size that can be inserted.

  FIG. 13 shows a cross-sectional view of the state where the above-mentioned 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 in the state where each part is 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, since the waterproof sheet 492 is pressurized by the convex portions 490b provided around the fixed protrusion 490a, the adhesiveness of the waterproof sheet 492 is improved and the waterproof property is improved.

  FIG. 14 shows an example of another shape of the waterproof sheet. The upper waterproof sheet 492b installed on the thermostat 450Q side has substantially the same shape as the thermostat holder 491, and the lower waterproof sheet 492c has approximately the same shape as the heater fixture 490. ing. By adopting such a shape, it becomes easy to adhere the waterproof sheet to a predetermined position, and work efficiency and quality stability can be obtained.

FIG. 15 shows an example of another shape of the heater fixture. In this example, the heater fixture 490 is used.
The fixed protrusion is not a cylindrical shape by burring, but is a fixed protrusion 490c by bending. With this configuration, the processing becomes easy, the degree of freedom of the height of the fixing protrusion is increased, and it is possible to cope with a thick toilet seat heater.

  FIG. 16 is a cross-sectional view showing a state in which the thermal fuse 450R is installed in the other temperature measuring section 450T.

  The temperature fuse 450R is temporarily fixed to the temperature detecting section 450T with an adhesive tape. On the other hand, a temperature fuse fixing tool 450S formed of a spring material is fixed to a fixing boss 420a provided on the lower toilet seat casing 420 of the toilet seat 400 with a screw, and the upper toilet seat casing 410 and the lower toilet seat casing 420 are assembled together. As shown, the temperature fuse 450R is in close contact with the temperature detecting portion 450T of the toilet seat heater 450 by the elasticity of the temperature fuse fixture 450S, and can accurately detect the temperature of the temperature detecting portion. In the toilet seat device having the above-described configuration, when the toilet seat heater 450 reaches an unexpected abnormal temperature, the energization is temporarily stopped by opening the resettable thermostat 450Q. Further, if the reset thermostat 450Q breaks down or the like, and the toilet seat heater 450 tries to reach a dangerous temperature, the non-reset temperature fuse 450Q is blown to cut off the power supply.

  Here, it is desirable that the operating temperature setting of the thermostat 450Q or the thermal fuse for preventing overheating is set lower than the temperature at which it is actually desired to shut off. The toilet seat having the configuration described in the present embodiment has a high rate of temperature increase. Therefore, depending on the operating speed of the safety device (for example, the thermostat 450Q or the thermal fuse), the toilet seat surface may be at a temperature higher than the preset temperature at the timing when the energization is actually stopped. Because there is. Of the human skin, the skin of the buttocks and thighs that are not normally exposed are more sensitive than the skin of other parts. Thereby, a higher safety design as described above becomes important.

(3-e) Fourth Example of Toilet Seat 400 FIG. 17 is a plan view of the toilet seat heater 450 of the toilet seat 400 in the fourth example.

  As shown in FIG. 17, the linear heater 460 arranged in the region from the sheet center part SE3 to the left sheet one end part SE1, and the linear array arranged in the area from the sheet center part SE3 to the sheet other end part SE2. The heater 460 is separated from each other.

  The heater start end portion 460a and the heater end portion 460b of the one linear heater 460 are connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400, respectively. The heater start end portion 460 c and the heater end portion 460 d of the other linear heater 460 are respectively connected to lead wires 470 drawn from the other side of the rear portion of the toilet seat 400.

(3-f) Fifth Example of Toilet Seat 400 FIG. 18 is a plan view of the toilet seat heater 450 of the toilet seat 400 in the fifth example.

  As shown in FIG. 18, the linear heater 460 is arranged in a meandering shape that meanders in the left-right direction in accordance with the shape of the upper toilet seat casing 410, as in FIG. 8A of the second example of the toilet seat 400. Is done.

Specifically, the linear heater 460 extends from one side of the rear portion of the toilet seat heater 450 to the vicinity of the seat one end portion SE1 while laterally meandering to form the first series A meandering shape of FIG. 8B. Is done. Further, the linear heater 460 meanders from the vicinity of the sheet one end part SE1 to the left and right while extending to the vicinity of the sheet other end part SE2 through the vicinity of the sheet center part SE3, thereby forming the second series B meandering shape. Is done. Further, the linear heater 460 extends from the vicinity of the seat other end portion SE2 to the one side of the rear portion of the toilet seat heater 450 through the vicinity of the seat center portion SE3, thereby forming a first series A meandering shape.

  Further, as in FIG. 8A, the first series A meandering linear heater 460 and the second series B meandering linear heater 460 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 460 a and the heater end portion 460 b 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.

  Further, in this example, the heater linear density per unit area of the upper toilet seat casing 410 is substantially equal by changing Lb in FIG. 8B so that the temperature distribution on the surface of the toilet seat 400 is uniform.

  Specifically, Lb = 15 mm in the toilet seat heater regions A1 and A5, and Lb = 19 mm in the toilet seat heater region A3. Toilet seat heater areas A2 and A4 are set to Lb = 16 to 18 mm, and the heater linear density is gradually increased by gradually decreasing Lb from the side closer to toilet seat heater area A3.

  With this configuration, the heater linear density at the center of the toilet seat is lowered, the heater linear density at the front and rear of the toilet seat is increased, and the density change is smooth, so the overall length of the linear heater 460 remains almost unchanged. The temperature distribution on the surface of the toilet seat 400 can be made uniform.

  On the other hand, when the user is seated, he / she feels the coldest, and the heater linear density around the toilet seat heater areas A3 and A4, which is the area where the thighs having a large contact area will come into contact, is increased. A configuration is also conceivable in which the density of the region is reduced and the temperature distribution on the surface of the toilet seat 400 is not uniform.

  In addition, the present embodiment is an example in which the linear heater 460 is a single wire, but the present invention is not limited to this, and a configuration including two or more linear heaters 460 is also conceivable.

(3-g) First Structure Example of Toilet Seat Heater 450 FIG. 19 is a cross-sectional view showing a first structure example of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  As shown in FIG. 19, the upper toilet seat casing 410 is formed of an aluminum plate 413 having a thickness of 1 mm, for example. An alumite layer 412 and a surface decorative layer 411 are formed on the upper surface of the aluminum plate 413. The upper surface of the surface decorative layer 411 becomes the seating surface 410U. A coating film 414 is formed on the lower surface of the aluminum plate 413. The coating film 414 is a polyester powder coating film having a film thickness of 40 μm and heat resistance of 150 ° C., for example.

  Instead of the aluminum plate 413, one or more of a copper plate, a stainless steel plate, an aluminum plated steel plate, and a zinc aluminum plated steel plate may be used.

  A metal foil 451 made of, for example, aluminum is attached to the lower surface of the coating film 414 via an adhesive layer 452a. The film thickness of the metal foil 451 is, for example, 50 μm.

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, for example, and is made of copper or a copper alloy. In this example, a high tensile strength heater wire made of 4% Ag—Cu alloy having a diameter of 0.176 mm is used as the heating wire 463a. The resistance value is 0.833 Ω / m.

  The enamel layer 463b is made of, for example, polyesterimide (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 heat resistance of 260 ° C., for example. The thickness of the insulating coating layer 462 is, for example, 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.

  Note that polyimide (PI) or polyamideimide (PAI) may be used as the material of the insulating coating layer 462.

The outer diameter of the linear heater 460 is, for example, 0.46 to 0.50 mm. The power density of the linear heater 460 is, for example, 0.95 W / cm ² .

  The linear heater 460 is attached to the metal foil 451 so as to be covered with an adhesive layer 452b and a metal foil 453 made of, for example, aluminum. The film thickness of the metal foil 453 is, for example, 50 μm.

  In this manner, a double insulation structure can be ensured by forming the insulating coating layer 462 on the single enamel wire 463.

  Further, sufficient insulation can be obtained even if the insulating coating layer 462 is relatively thin. Therefore, the thickness of the insulating coating layer 462 can be reduced. In the above example, the thickness of the resin layer (enamel layer 463b and insulating coating layer 462) of the linear heater 460 is about 0.12 mm and is extremely thin. In this case, heat conduction from the heating wire 463a to the metal foil 451 and the toilet seat casing 410 can be performed very agile.

  Incidentally, in the conventional toilet seat device, the thickness of the covering tube made of silicone rubber, vinyl chloride or the like of the linear heater is about 1 mm, which is about 10 times that of the above example. The heat conduction rate of such a coated tube was extremely slow, and the temperature raising rate of the toilet seat could not be increased.

  In the conventional toilet seat device, when a large electric power is supplied to the heater wire in order to forcibly increase the temperature raising rate of the toilet seat, the coated tube is melted and burnt out as in the case where the temperature of the heater wire is increased in the heat insulating state. Therefore, raising the temperature of the toilet seat by such a method has not been practical.

On the other hand, when the enameled wire 463 having excellent heat resistance as in this example is used as a heater wire, the temperature of the toilet seat can be raised in a sufficiently short time, and electrical insulation and safety can be ensured. Therefore, the structure of this example can be effectively used for various toilet seat devices.

  In the structure of this example, the resin layer composed of the enamel layer 463b and the insulating coating layer 462 can be formed with a thin thickness of about 0.1 to 0.4 mm. Thus, the temperature of the toilet seat can be rapidly raised while the absolute temperature of the heating wire 463a and the resin layer is maintained at a low temperature. As a result, a relatively inexpensive insulating material can be used instead of an expensive heat-resistant insulating material.

  In this example, in order to efficiently transfer the heat of the linear heater 460 to the toilet seat casing 410, the linear heater 460 is sandwiched between aluminum foils 451 and 452. Here, in the linear heater 460 of this example, since the enamel layer 463b and the insulating coating layer 462 can be thinned, the outer diameter of the linear heater 460 can be reduced (about φ0.2 to φ0.4). In this case, when the aluminum foil 451 and the aluminum foil 452 are bonded together, the air layer between the aluminum foil 451 and the aluminum foil 452 can be reduced, and wrinkles of the aluminum foils 451 and 452 can be reduced. it can. Thereby, the local high heat of the enamel wire 463 is suppressed, and the disconnection of the enamel wire 463 and the damage to the electrical insulating layer (enamel layer 463b and the insulating coating layer 462) are prevented. As a result, the service life of the toilet seat device 110 can be extended.

  Further, since the enamel wire 463 can be made thin, the weight of the toilet seat heater 450 can be reduced, and the toilet seat opening / closing torque can be reduced. Thereby, the electric opening / closing unit for opening and closing the toilet seat can be downsized, and the toilet seat device 110 can be downsized.

(3-h) Second Structural Example of Toilet Seat Heater 450 FIG. 20 is a cross-sectional view illustrating a second structural example of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  In the example of FIG. 20, a plurality of enamel wires 463 are twisted and covered with an insulating coating layer 462. Each enamel wire 463 is constituted by, for example, a heating wire 463a having a diameter of 0.1 mm and an enamel layer 463b having a thickness of 10 μm.

  Thus, a double insulation structure can be ensured by forming the insulation coating layer 462 so as to surround the bundle of the plurality of enamel wires 463.

  In the example of FIG. 20, seven enamel wires 463 are twisted together, but the number of enamel wires 463 is not limited to seven. For example, two heating wires 463a (hereinafter referred to as a single heating wire 463a) that are not covered with the two enamel wires 463 and the enamel layer 463b may be twisted together.

  In this configuration, for example, when one enamel layer 463b of the two enamel wires 463 is broken down due to local high heat or the like, the heating wire 463a of the enamel wire 463 and the single heating wire 463a described above Are electrically connected. Therefore, according to this configuration, the dielectric breakdown of the enamel layer 463b can be detected by using the single heating wire 463a as the dielectric breakdown detection line. Thereby, when the enamel layer 463b of any one of the two enamel wires 463 is broken down, the energization to all the heating wires 463a can be cut off.

  That is, even if the enamel layer 463b of any enamel wire 463 is broken down by local high heat or the like by making at least one of the plurality of stranded wires non-insulated wires without the enamel layer 463b, Dielectric breakdown can be detected quickly. Thereby, it is possible to safely cut off the power supply to the heating wire 463a.

  In the above description, the case where a plurality of enamel wires 463 are twisted together has been described. However, a plurality of enamel wires 463 may be simply bundled.

  Further, the direction of the current flowing through the predetermined number of the heating lines 463a among the plurality of heating lines 463a may be reversed from the direction of the current flowing through the remaining heating lines 463a. In this case, the magnetic field generated by the current flowing in one direction and the magnetic field generated by the current flowing in the other direction cancel each other. Thereby, generation | occurrence | production of a leakage magnetic field and generation | occurrence | production of noise can be suppressed.

(3-i) Fourth Structural Example of Toilet Seat Heater 450 FIG. 21 is a cross-sectional view illustrating a fourth structural example of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  In the example of FIG. 21, a heat resistant insulating layer 455 is formed between the metal foil 451 and the adhesive layer 452b. Further, a heat resistant insulating layer 456 is formed between the adhesive layer 452b and the metal foil 453. The heat-resistant insulating layer 455 is made of, for example, polyethylene terephthalate (PET) having a heat resistance of 150 ° C. and a film thickness of 12 to 25 μm. Similarly, the heat-resistant insulating layer 455 is made of PET having a heat resistance of 150 ° C. and a film thickness of 12 to 25 μm, for example.

  In this manner, a triple insulation structure can be secured by forming the insulating coating layer 462 on the single enamel wire 463 and forming the heat resistant insulating layers 455 and 456.

  In the toilet seat heater 450 of FIG. 21, a bundle of a plurality of enamel wires 463 may be used instead of the single enamel wire 463.

(3-j) Fifth Structural Example of Toilet Seat Heater 450 FIG. 22 is a cross-sectional view illustrating a fifth structural example of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  This example is different from the fourth structural example in that an air vent hole 495 penetrating the metal foil 453, the heat-resistant insulating layer 455, and the adhesive layer 452b is disposed on substantially the entire surface of the toilet seat heater.

  In the linear heater 460, the periphery of the heating wire 463 a is usually covered with an enamel layer 463 b and an insulating coating layer 462, so that double insulation is normally maintained. The linear heater 460 is disposed so as to be sandwiched between the metal foils 451 and 453 by the effect of the adhesive layer 452. When the linear heater 460 generates heat when energized, the heat is conducted to the metal foils 451 and 453, and the entire sheet-like toilet seat heater 450 has an effect of increasing the temperature in a uniform state. When there is an air layer (between the metal foil), heat radiation from the linear heater 460 is inhibited and the heater wire temperature rises. When 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 insulation is destroyed, and eventually the heating wire 463a is disconnected.

  As a device for preventing an air layer from being generated as much as possible, a metal foil 453, a heat-resistant insulating layer 455, and an air vent hole 751c penetrating the adhesive layer 452b are provided in advance, and a roller immediately after sandwiching the linear heater 460 with the metal foil. By applying the press working, it is possible to obtain an effect that the two metal foils are firmly attached to the linear heater 460 in a state where excess air has escaped from the inside.

(3-j) Sixth Structural Example of Toilet Seat Heater 450 FIG. 23 is a cross-sectional view illustrating a sixth structural example of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  As shown in FIG. 23, this example is different from the fifth structural example in that it is covered with a heat-resistant insulating layer 455a integrally laminated on the outside of the metal foil 453, and the back surface of the adhesive layer 452b is heat-resistant with a PET film. In addition to the addition of an insulating layer 455c and an adhesive layer 452c, a waterproof seal 495 is applied to the metal foil over the entire circumference of the end surface portions of 451 and 453 with a material excellent in electrical insulation.

  The linear heater 460 normally has double insulation by covering the periphery of the heating wire 463a with an enamel layer 463b and an insulating coating layer 462. The linear heater 460 is arranged in a form sandwiched between the metal foils 451 and 453 by the effect of the adhesive layer 452, and a heat resistant insulating layer integrally laminated to the metal foil on the outside of the metal foil. 455a and 455b. When the linear heater 460 generates heat when energized, the heat is conducted to the metal foils 451 and 453 and the sheet-like toilet seat heater 450 has an effect of increasing the temperature in a uniform state. When there is an air layer (between the metal foil), heat radiation from the linear heater 460 is inhibited and the heater wire temperature rises. When 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 insulation is destroyed, and eventually the heating wire 463a is disconnected.

  As a device for preventing an air layer from being generated as much as possible, a metal foil 453 and an insulating coating layer 455b are provided with a through-hole 701 for venting air in advance, and roller pressing is performed immediately after the linear heater 460 is sandwiched with the metal foil. Thus, it is possible to obtain an effect in which the two metal foils are firmly attached to the linear heater 460 in a state where excess air has escaped from the inside. FIG. 23 shows a configuration in which the air vent hole 451c is provided through the metal foil 451, the heat resistant insulating layer 455b, and the adhesive layer 452b, but even when the air vent hole 451c is provided in the metal foil 453 and the heat resistant insulating layer 455a. Similar effects can be obtained.

  If the insulation of the linear heater 460 is damaged for some reason by providing a lead wire conducting to the metal foils 451 and 453 and monitoring the current flowing therethrough, the current leaked from the heater wire due to energization is electrically It is possible to ensure safety by detecting the circuit and stopping energization. When adopting such a dielectric breakdown detection circuit, as a consideration to prevent conduction between the detection circuit and the human body even if water enters the toilet seat and the toilet seat surface is also wet. It is necessary to ensure the water-insulating properties of the metal foils 451 and 453.

  As shown in FIG. 23, a heat-resistant insulating layer 455c is attached with the effect of the adhesive layer 452c for the purpose of closing the air vent hole 451c, and a waterproof seal 495 is formed on the end faces of the metal foils 451 and 453 with a material having excellent electrical insulation. By applying it, it is possible to satisfy the water-insulating performance. The material and shape of the waterproof seal 495 can be freely selected in consideration of workability, such as a tape-like material and a silicon coating agent, as long as waterproofness and electrical insulation are satisfied. In FIG. 23, a heat resistant insulating layer 455c for closing the air vent hole 451c is arranged between the toilet seat heater 450 and the upper toilet seat casing 410, but the air vent hole 451c is provided on the metal foil 451 and the heat resistant insulating layer 455a side. In this case, since the heat-resistant insulating layer 455c is disposed on the inner side of the toilet seat heater 450, there is an advantage that a factor that hinders heat transfer from the heater is not added between the upper toilet seat casing 410 and the heat-resistant insulating layer 455c. Have.

  Further, by providing a sufficient creepage distance between the end faces of the metal foils 451 and 453 and the end face of the heat-resistant insulating layer 455c, even if the waterproof seal 700 is damaged, water is not interposed. Insulation by space can be ensured. As a sufficient creepage distance dimension for ensuring insulation, at least 2.5 to 3 mm is required.

(3-k) Covering Thickness of Heating Wire 463a FIG. 24 is a diagram showing a measurement result of the relationship between the coating thickness of the heating wire 463a and the temperature rise of each part of the toilet seat 400. In FIG. 24, the horizontal axis represents the coating thickness of the heating wire 463a, and the vertical axis represents the temperature rise value [K] 6 seconds after the start of energization.

  For the measurement, a toilet seat heater 450 having the structure of FIG. 21 was used. The coating thickness of the heating wire 463a is the thickness between the heating wire 463a and the aluminum plate 413. In this example, the total thickness of the enamel layer 463b, the heat-resistant insulating layer 455, the adhesive layer 452a, and the coating film 414 It is.

  Here, the temperature rise of the seating surface 410U of the toilet seat 400, which is about 10K in 6 seconds, was regarded as the practical temperature rise performance, and the temperature rise of about 13K in 6 seconds was taken as the target temperature rise performance.

  In FIG. 24, the circle marks are the temperature rise values of the seating surface 410U of the toilet seat 400, the triangle marks are the temperature rise values of the metal foil 451 made of aluminum, and the square marks are the temperature rise values of the insulating coating layer 462. .

  From the results of FIG. 24, it is understood that practical temperature rise performance can be obtained when the coating thickness of the heating wire 463a is 0.4 mm or less. It can also be seen that the target temperature rise performance is obtained when the coating thickness of the heating wire 463a is 0.2 mm or less. Therefore, the coating thickness of the heating wire 463a is preferably 0.4 mm or less, and more preferably 0.2 mm or less.

(3-1) Material of Insulating Coating Layer 462 Next, an AC voltage of 100 V was applied to three types of toilet seat heaters 450 having the structure shown in FIG. 21, and the temperature of the heating wire 463a was measured.

  In the first toilet seat heater 450, PFA having a film thickness of 100 μm and a heat resistant temperature of 260 ° C. is used as the material of the insulating coating layer 462, and PET having a film thickness of 25 μm and a heat resistant temperature of 150 ° C. is used as the material of the heat resistant insulating layers 455 and 456, respectively. It was. In the second toilet seat heater 450, a PI winding coating having a film thickness of 35 to 40 μm and a heat resistant temperature of 350 ° C. is used as the material of the insulating coating layer 462, and a film thickness of 25 μm and a heat resistant temperature of 150 ° C. are used as the material of the heat resistant insulating layers 455 and 456, respectively. PET was used. In the third toilet seat heater 450, a PI winding coating having a film thickness of 35 to 40 μm and a heat resistant temperature of 350 ° C. is used as the material for the insulating coating layer 462, and a film thickness of 3 to 6 μm and a heat resistant temperature are used as the material for the heat resistant insulating layers 455 and 456, respectively. A 90 ° C. acrylic resin was used.

  For the first toilet seat heater 450, the temperature of the heating wire 463a was 162.3 ° C., which is lower than the heat resistance temperature 260 ° C. of the insulating coating layer 462 made of PFA. For the second toilet seat heater 450, the temperature of the heating wire 463a was 155.4 ° C., which is lower than the heat resistance temperature 350 ° C. of the insulating coating layer 462 made of PI. For the third toilet seat heater 450, the temperature of the heating wire 463a was 125.7 ° C., which was lower than the heat resistance temperature 350 ° C. of the insulating coating layer 462 made of PI.

  From these results, it was found that not only PFA but also other resins such as PI can be used as the material of the insulating coating layer 462.

(3-m) Connection Method Between Linear Heater 460 and Lead Wire 470 FIG. 25 is a diagram illustrating a connection method between the linear heater 460 and the lead wire 470. FIG. 26 is a cross-sectional view of a connection portion between the linear heater 460 and the lead wire 470. FIG. 27 is a diagram showing a heat caulking method.

  As shown in FIGS. 25 and 26, the core wire of the lead wire 470 is connected to the terminal 471. The terminal 471 is bent into a U shape, and the bent tip of the linear heater 460 is inserted into the U-shaped bent portion of the terminal 471.

  In this state, as shown in FIG. 27, the U-shaped bent portion of the terminal 471 is sandwiched between a pair of electrodes EL1, EL2. A current is supplied from the transformer TS to the terminal 471 and the linear heater 460 through the electrodes EL1 and EL2 while pressing the U-shaped bent portion of the terminal 471 with the pair of electrodes EL1 and EL2. Thereby, as shown in FIG. 26, 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 terminal 471 at the contact point 463C.

  As shown in FIG. 25, a heat-resistant sheet 480 made of a polyimide thin film having a thickness of 12 μm, for example, is wound around the connection portion 475 between the terminal 471 of the lead wire 470 and the linear heater 460 two or three times. Furthermore, the connection part 475 between the terminal 471 of the lead wire 470 and the linear heater 460 is covered with a silicone resin and is sandwiched between the metal foils 451 and 453 of FIGS.

  Thus, the heat of the heating wire 463a of the linear heater 460 is conducted to the metal foils 451 and 453 and the terminal 471 of the lead wire 470. Thereby, local overheating and disconnection of the heating wire 463a are prevented, and the heat uniformity of the toilet seat heater 450 is ensured.

  Further, the connecting portion 475 between the heating wire 463a of the linear heater 460 and the terminal 471 of the lead wire 470 has a double insulation structure of the heat-resistant sheet 480 and silicone resin. In this case, the heat of the connecting portion 475 is conducted to the metal foils 451 and 453 of the toilet seat heater 450 through the heat-resistant sheet 480 and the silicone resin. Thereby, local overheating and disconnection of the heating wire 463a are prevented while ensuring sufficient insulation.

  Furthermore, since the heating wire 463a of the linear heater 460 and the terminal 471 of the lead wire 470 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 order to ensure the safety of the toilet seat 400, the toilet seat device 110 includes two safety circuits. One safety circuit is connected between one lead wire 470 of the toilet seat heater 450 and the toilet seat heater breakdown detection circuit inside the printed circuit board 230, and the other safety circuit is connected to both lead wires of the toilet seat heater 450. It is connected between 470 and the toilet seat heater disconnection detection circuit. Both safety circuits are used to prevent electric shock of the user when an abnormality occurs in the toilet seat heater 402.

  The toilet seat heater dielectric breakdown detection circuit detects that a current flows between the toilet seat heater 450 and the metal foil 451 when the insulating coating layer 462 is melted when the toilet seat heater 450 abnormally generates heat. The toilet seat heater disconnection detection circuit detects that the voltage waveform generated at both ends of the toilet seat heater 450 is not generated when the toilet seat heater 450 is disconnected. The heater driving unit 402 energizes the toilet seat heater 450 only when both of the two safety circuits detect a normal state.

(3-n) Operation of Toilet Seat Heater 450 Next, the operation of the toilet seat heater 450 will be described. When a constant voltage is applied between the heater start end portion 460a and the heater end portion 460b of the toilet seat heater 450, a current flows through the internal heating line 463a, and the heating line 463a generates heat. At this time, the generated heat passes from the heating wire 463a through the enamel layer 463b and the metal foils 451 and 453 to the upper toilet seat casing 4.
Conducted to ten seating surfaces 410U.

  In the linear heater 460, since the insulating coating layer 462 is formed of PFA having a heat resistance of about 260 ° C., even if the thickness of the insulating coating layer 462 is as thin as 0.1 to 0.15 mm, for example, the heating wire 463a It is possible to prevent the enamel layer 463b from being destroyed even at a rapid temperature rise to 100 to 150 ° C. Therefore, the temperature of the seating surface 410U can be raised rapidly by rapidly advancing the heat conduction from the linear heater 460 to the seating surface 410U.

  In this case, it takes a short time of 5 to 6 seconds from the start of energization to the linear heater 460, for example, until the user enters the toilet room and sits on the seating surface 410U. It takes less than 7-8 seconds. Therefore, even if the energization detection sensor 600 detects that the user has entered the toilet room and at the same time the energization of the linear heater 460 is started, the seating surface 410U has a sufficiently optimum temperature until the user is seated. Can be reached.

  Further, the inner region G3 and the outer region G1 of the seating surface 410U in FIG. 7 have higher heat dissipation than the central region G2. In the present embodiment, the linear heaters 460 are arranged more densely in the inner region G3 and the outer region G1 than in the central region G2. Therefore, the temperature unevenness and the cold feeling are not felt at the moment when the user is seated on the seating surface 410U.

  On the other hand, the linear heater 460 is as long as about 10 m in total length, and rapidly expands as the heating wire 463a rapidly rises. As a result, the linear heater 460 expands in the length direction. In addition, when the energization is stopped, the temperature of the heating wire 463a is decreased and returns to the original length due to contraction. That is, thermal stress strain due to thermal expansion and contraction is repeatedly formed on the heating wire 463a.

  When the adhesion between the linear heater 460 and the metal foils 451 and 453 is weak, or when a gap is formed between the linear heater 460 and the seating surface 410U, the entire thermal stress strain is at the most easily moved portion of them. concentrate. As a result, a relatively strong bending / extending motion occurs in the linear heater 460, and damage to the linear heater 460 such as breakage of the heating wire 463a occurs due to accumulation of stress fatigue.

  In this example, since a plurality of bent portions are formed as thermal stress buffering portions in the linear heater 460, these bent portions finely disperse the entire thermal stress strain, and the bent portion exhibits thermal stress strain. Also acts to absorb. Therefore, the thermal stress at the bent portion is extremely small, and as a result, only slight bending and stretching occur. As a result, the heating wire 463a is not broken, and the life and durability of the linear heater 460 are improved.

  In addition, in the inner region G3 and the outer region G1 of the seating surface 410U with relatively large heat dissipation, the interval between the linear heaters 460 may be increased and the number of bent portions may be reduced as compared with the central region G2. .

  As described above, the overall length of the linear heater 460 is as long as approximately 10 m, and a bent portion is formed in the linear heater 460. Therefore, it is necessary to maintain and fix the arrangement of the linear heaters 460 when the linear heaters 460 are mounted on the seating surface 410U. A unitized toilet seat heater 450 is configured by closely attaching the linear heater 460 to the metal foils 451 and 453 in a state where the linear heater 460 is sandwiched between the metal foils 451 and 453. Therefore, the linear heater 460 can be bonded to the seating surface 410U in a state where the arrangement of the linear heaters 460 is firmly maintained.

Further, since the linear heater 460 is sandwiched between the metal foils 451 and 453, the metal foils 451 and 453 perform heat distribution evenly. Thereby, it can prevent that the linear heater 460 heats up. In addition, the seating surface 410U is soaked and the toilet seat heater 450 is prevented from being damaged.

(3-o) Energization Sequence of Toilet Seat Device 110 The driving control of the toilet seat heater 450 is performed by changing the electric power for driving the toilet seat heater 450 to three.

  For example, when the temperature of the toilet seat 400 is raised with a first temperature gradient, the heater driving unit 402 in FIG. 3 drives the toilet seat heater 450 with about 1200 W of power (1200 W drive).

  As described above, the resistance value of the toilet seat heater 450 is 0.833 Ω / m, and the total length is 10 m. Therefore, the resistance value of the toilet seat heater 450 is 8.33Ω. When AC 100 V is applied to the toilet seat heater 450 having this resistance value, power of (100 V × 100 V) ÷ 8.33Ω = 1200 W is generated. That is, 1200 W of electric power is generated by passing a current through the toilet seat heater 450 over the entire period of the AC power supply.

  When the temperature of the toilet seat 400 is raised at a second temperature gradient that is slightly gentler than the first temperature gradient, the heater driving unit 402 drives the toilet seat heater 450 with about 600 W of power (600 W drive). Further, when the temperature of the toilet seat 400 is kept constant, the heater driving unit 402 drives the toilet seat heater 450 with about 50 W of power (low power driving). Note that low power driving refers to driving the toilet seat heater 450 with sufficiently low power (for example, power in the range of 0 W to 50 W) compared to 1200 W driving and 600 W driving.

  Switching between 1200 W driving, 600 W driving, and low power driving is performed by the energization rate switching circuit of the control unit 90 controlling energization from the heater driving unit 402 to the toilet seat heater 450.

  An AC current is supplied to the heater driving unit 402 from a power supply circuit (not shown). Therefore, the heater drive unit 402 causes the alternating current supplied based on the energization control signal provided from the energization rate switching circuit to flow through the toilet seat heater 450.

  FIG. 28 is a diagram illustrating a driving example of the toilet seat heater 450 and a change in the surface temperature of the toilet seat 400.

  FIG. 28 shows a graph showing the relationship between the surface temperature of the toilet seat 400 and time, and a graph showing the relationship between the energization rate and time when the toilet seat heater 450 is driven. The horizontal axis of these two graphs is a common time axis.

  In this example, it is assumed that the user turns on the heating function in advance and sets the toilet seat set temperature high (38 ° C.).

  When the room temperature such as in winter is lower than the standby temperature of 18 ° C., the control unit 90 (FIG. 3) adjusts the temperature of the toilet seat 400 to 18 ° C. As described above, the controller 90 controls the toilet seat heater 450 so that the surface temperature of the toilet seat 400 is constant at 18 ° C. during the waiting period D1 until the user's entrance is detected by the entrance detection sensor 600. Low power drive is performed.

When the entry detection sensor 600 detects entry of the user at time t1, the control unit 90 performs 600 W driving during the inrush current reduction period D2. This 600 W drive is performed in order to sufficiently reduce the inrush current. In this case, the surface temperature of the toilet seat 400 is a moderate second.
The temperature gradient is raised.

  Thereafter, the control unit 90 starts 1200W driving of the toilet seat heater 450 at time t2 after the rush current reduction period D2 has elapsed, and continues 1200W driving of the toilet seat heater 450 during the first temperature rising period D3. In this case, the surface temperature of the toilet seat 400 is increased with the first temperature gradient described above.

  Here, the surface temperature of the toilet seat 400 is rapidly increased. The toilet seat heater 450 is driven at 1200 W until the surface temperature of the toilet seat 400 reaches a predetermined temperature (for example, 30 ° C.). Of course, the predetermined temperature may be a temperature set as the heating temperature. However, the predetermined temperature is not a temperature sufficiently increased to the heating temperature, and even when the predetermined temperature is lower than the predetermined temperature, when the user is seated. It may be the lowest limit temperature (limit temperature) that does not cause an unpleasant feeling of being cold. This limit temperature has been found to be about 29 ° C. by subject experiments conducted by the inventors.

  Thus, in the first temperature increase period D3, the surface temperature of the toilet seat 400 is rapidly increased to a predetermined temperature by 1200 W driving. Thus, the user can sit on the toilet seat 400 without feeling that the toilet seat 400 is cold.

  In addition, as described above, when the surface temperature of the toilet seat 400 is rapidly increased, an overshoot occurs in the temperature change. However, in this example, when the surface temperature of the toilet seat 400 reaches a predetermined temperature, the 1200 W drive of the toilet seat heater 450 is switched to the 600 W drive. Therefore, even when the change in the surface temperature of the toilet seat 400 overshoots, the surface temperature does not exceed the toilet seat set temperature. As a result, the user is prevented from feeling the toilet seat 400 hot when seated.

  Subsequently, the control unit 90 starts 600W driving of the toilet seat heater 450 at time t3 after the elapse of the first temperature rising period D3, and continues 600 W driving of the toilet seat heater 450 during the second temperature rising period D4. To do. In this case, the surface temperature of the toilet seat 400 is raised with the second temperature gradient described above.

  The 600 W drive of the toilet seat heater 450 is performed until the surface temperature of the toilet seat 400 reaches the toilet seat set temperature (38 ° C.).

  The second temperature gradient is gentler than the first temperature gradient. This prevents a large overshoot from occurring in the change in the surface temperature of the toilet seat 400.

  The controller 90 starts low-power driving of the toilet seat heater 450 at time t4 after the elapse of the second temperature rising period D4, and continues low-power driving of the toilet seat heater 450 during the first maintenance period D5. Thereby, the surface temperature of the toilet seat 400 is constant at the toilet seat set temperature.

  When the seating sensor 290 detects that the user is seated on the toilet seat 400 at time t5, the controller 90 reduces the energization rate of the low-power drive, and the surface of the toilet seat 400 during the first seating period D6. The low-power drive of the toilet seat heater 450 is continued so that the temperature maintains the toilet seat set temperature. In this example, the first seating period D6 is set to about 10 minutes.

  In addition, the control unit 90 further reduces the energization rate of the low power drive at time t6 after the first seating period D6 has elapsed, and the surface temperature of the toilet seat 400 during the second seating period D7 is the toilet seat set temperature. The low-power drive of the toilet seat heater 450 is continued so that the temperature is lowered to a slightly lower temperature (36 ° C.). In this example, the second seating period D7 is set to about 2 minutes.

At time t7 after the elapse of the second seating period D7, the control unit 90 further decreases the energization rate of the low power drive, and the surface temperature of the toilet seat 400 is lower than the toilet seat set temperature during the second maintenance period D8. The low-power drive of the toilet seat heater 450 is continued so as to be constant at a slightly low temperature (36 ° C.). In the following description, the surface temperature of the toilet seat 400 that is maintained constant in the second maintenance period D8, that is, a temperature slightly lower than the toilet seat set temperature is referred to as a maintenance temperature.

  Thus, in this example, after the user is seated on the toilet seat 400, the controller 90 gradually reduces the surface temperature of the toilet seat 400. This prevents the user from getting burned at low temperatures.

  When it is detected by the seating sensor 290 that the user has left the toilet seat 400 at time t8, the controller 90 stops driving the toilet seat heater 450 during the stop period D9. Thereby, the surface temperature of the toilet seat 400 decreases.

  The controller 90 starts the low-power driving of the toilet seat heater 450 again at time t9 when the surface temperature of the toilet seat 400 reaches 18 ° C., and waits for the surface temperature of the toilet seat 400 to be constant at 18 ° C. The low power driving of the toilet seat heater 450 is maintained during D10.

  Thus, when the temperature gradient becomes gradually gentle, the overshoot caused by the temperature change of the toilet seat 400 can be sufficiently reduced.

  In this example, after the user sits on the toilet seat 400, the surface temperature of the toilet seat 400 is gradually decreased by adjusting the power used to drive the toilet seat heater 450. The user may stop when sitting on the toilet seat 400. Even in this case, it is possible to prevent the user from getting burned at a low temperature.

  As described above, in this example, it has been described that the driving of the toilet seat heater 450 is stopped when it is detected that the user has left the toilet seat 400 at time t8, but the driving of the toilet seat heater 450 is stopped. May be performed after a lapse of a certain time (for example, 1 minute) from time t8 when it is detected that the user has left the toilet seat 400. In this case, the surface temperature of the toilet seat 400 does not decrease even when the user once again leaves the toilet seat 400 and again feels comfortable and sits on the toilet seat 400 again. As a result, the user can comfortably sit on the toilet seat 400.

  The energization state of the toilet seat heater 450 during 1200 W drive, 600 W drive, and low power drive will be described together with the energization control signal of the energization rate switching circuit.

  In the following description, the energization rate refers to the ratio of the time during which an alternating current is passed through the toilet seat heater 450 for one cycle of the alternating current.

  FIG. 29A is a waveform diagram of a current flowing through the toilet seat heater 450 during 1200 W drive, and FIG. 29B is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater drive unit 402 during 1200 W drive.

  As shown in FIG. 29B, the energization control signal at the time of 1200 W driving is always logic “1”. When the energization control signal is logic “1”, the heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 (FIG. 29A, bold line portion). Thereby, an alternating current flows through the toilet seat heater 450 over the entire period. As a result, the toilet seat heater 450 is driven with about 1200 W of power.

FIG. 30A is a waveform diagram of a current flowing through the toilet seat heater 450 when driven at 600 W, and FIG. 30B is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit 402 when driven at 600 W.

  As shown in FIG. 30B, the energization control signal at the time of 600 W driving is composed of pulses having the same cycle as the alternating current supplied to the heater driving unit 402. The duty ratio of the pulse is set to 50%.

  The heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 when the energization control signal is logic “1” (FIG. 30A, bold line portion). Thereby, an alternating current flows through the toilet seat heater 450 during a half cycle. As a result, the toilet seat heater 450 is driven with about 600 W of electric power.

  FIG. 31A is a waveform diagram of a current flowing through the toilet seat heater 450 during low power driving, and FIG. 31B is a waveform diagram of an energization control signal provided from the energization rate switching circuit to the heater driving unit 402 during low power driving. .

  As shown in FIG. 31 (b), the energization control signal at the time of low power driving consists of pulses having the same cycle as the AC current supplied to the heater driving unit 402. The duty ratio of the pulse is set to be smaller than 50% (for example, about several percent).

  When the energization control signal is logic “1”, the heater drive unit 402 causes the alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 (FIG. 31A, bold line portion). In each cycle, an alternating current flows through the toilet seat heater 450 for a period corresponding to the pulse width. As a result, the toilet seat heater 450 is driven with electric power of about 50 W, for example.

  In addition to the above, when the temperature of the toilet seat 400 is lowered, or when the heating function of the toilet seat device 110 is turned off, the energization rate switching circuit does not give an energization control signal to the heater drive unit 402 (energization control). Set the signal to logic "0"). Thereby, the heater driving unit 402 does not drive the toilet seat heater 450.

  Here, generally, when the current supplied to the electronic device has a harmonic component, noise is generated. In this example, when 1200 W drive or 600 W drive of the toilet seat heater 450 is performed as described above, the current supplied to the toilet seat heater 450 changes so as to draw a sine curve. However, the generation of noise is sufficiently reduced.

  Further, when the toilet seat heater 450 is driven at low power, the current supplied to the toilet seat heater 450 has a harmonic component, but the magnitude of the current is much smaller than that at the time of 1200 W driving and 600 W driving, so Occurrence is sufficiently reduced.

  As described above, in the present embodiment, toilet seat heater 450 is driven by electric power of 1200 W, 600 W, and about 50 W, but toilet seat heater 450 may be driven by other electric power.

  For example, when an alternating current is passed through the toilet seat heater 450 for a period of half a cycle, the timing for flowing the alternating current is set at intervals of a predetermined cycle such as two cycles or three cycles. As a result, the toilet seat heater 450 can be driven with power of a magnitude different from 1200 W, 600 W, and about 50 W while sufficiently preventing the generation of noise.

In this example, the control unit 90 supplies current to the toilet seat heater 450 when the energization control signal is logic “1”, and supplies current to the toilet seat heater 450 when the energization control signal is logic “0”. Although it is stopped, the supply of current to the toilet seat heater 450 is stopped when the energization control signal is logic “1”, and the current is supplied to the toilet seat heater 450 when the energization control signal is logic “0”. Good.

  In addition, since the on / off of the toilet seat heater 450 is controlled by time, the temperature of the toilet seat 400 does not exceed the predetermined value or does not reach the predetermined value when the time measurement is shifted. Therefore, the control unit 90 measures the time during which the toilet seat 400 is turned on using two measurement sources so that the time measurement does not deviate. As one measurement source, the on-time of the toilet seat heater 450 is measured by an oscillator that defines the effective speed of the program of the control unit 90, and another measurement source is used as the measurement source of the toilet seat heater 450 based on the cycle of the AC voltage. Measure the on time. When at least one of these measured values exceeds the specified time, the process proceeds to the next energization pattern.

  In particular, excessive temperature rise is reliably prevented by accurately measuring the time during which 1200 W is energized in the toilet seat. This further improves the safety of the device. Although a method for improving the measurement accuracy by providing a plurality of measurement sources has been described here, it is a method for measuring the time during which the toilet seat heater 450 is fully energized and forcibly interrupting or restricting the energization of the heater. However, the same effect can be obtained.

(3-o) Effects on Toilet Seat Device 110 In the toilet seat device 110 of this example, heat generated by the heating wire 463a of the linear heater 460 is transmitted to the upper toilet seat casing 410 via the enamel layer 463b and the insulating coating layer 462. Is done. Thereby, the temperature of the seating surface 410U rises.

  Here, the enamel layer 463b has sufficient electrical insulation. Therefore, even if the thickness of the enamel layer 463b is reduced, the heating wire 463a and the upper toilet seat casing 410 can be sufficiently insulated. Thereby, the thickness of the insulating coating layer 462 can also be reduced.

  Therefore, in the toilet seat device 110, the thickness of the enamel layer 463b and the insulating coating layer 462 can be reduced while reliably insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. In this case, the heat capacities of the enamel layer 463b and the insulating coating layer 462 can be reduced, so that the heat generated by the heating wire 463a can be efficiently transmitted to the seating surface 410U.

  In the toilet seat device 110, an aluminum plate 413 is used for the upper toilet seat casing 410. Therefore, the heat generated by the heating wire 463a can be transmitted to the seating surface 410U more efficiently.

  As a result, it is possible to quickly raise the temperature of the seating surface 410U while reliably insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410.

  Moreover, since the heat of the heating wire 463a can be efficiently transmitted to the seating surface 410U, the amount of heat generated by the heating wire 463a can be suppressed. Thereby, durability of the enamel layer 463b and the insulating coating layer 462 is improved. As a result, the reliability of the toilet seat device 110 is improved.

  Moreover, since the thickness of the enamel layer 463b and the insulating coating layer 462 for insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410 can be reduced, the weight of the toilet seat device 110 can be reduced.

  In addition, since the heating wire 463a is covered with the enamel layer 463b having sufficient heat resistance, a material having low heat resistance can be used for the insulating coating layer 462. Thereby, the product cost of the toilet seat apparatus 110 can be reduced reliably.

  Further, when the enamel layer 463b is formed of polyester imide or polyamide imide, the polyester imide and polyamide imide are excellent in electrical insulation and heat resistance. Therefore, the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410 are more connected. It is possible to quickly raise the temperature of the seating surface 410U while ensuring insulation.

  Furthermore, when the sum of the thickness of the enamel layer 463b and the thickness of the insulating coating layer 462 is 0.4 mm or less, the seating surface 410U is reliably insulated from the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. The temperature can be raised more quickly.

  In particular, when the sum of the thickness of the enamel layer 463b and the thickness of the insulating coating layer 462 is 0.2 mm or less, the temperature of the seating surface 410U can be raised more rapidly.

  Further, since the insulating coating layer 462 is made of a material having lower heat resistance than the enamel layer 463b, the product cost of the toilet seat device 110 can be sufficiently reduced.

  Moreover, since the linear heater 460 is provided so as to be sandwiched between the metal foil 451 and the metal foil 453 provided on the back surface side of the upper toilet seat casing 410, the heat generated by the heating wire 463a is applied to the metal foils 451 and 453. Is transmitted efficiently. One surface of the metal foil 451 is attached to the back surface of the upper toilet seat casing 410 and one surface of the metal foil 453 is attached to the other surface of the metal foil 451. Thereby, the heat transmitted from the heating wire 463a to the metal foils 451 and 453 can be efficiently transmitted to the entire back surface of the upper toilet seat casing 410. Thereby, the entire seating surface 410U can be heated uniformly.

  In particular, when the metal foils 451 and 453 are made of aluminum, the heat generated by the heating wire 463a can be quickly transmitted by the upper toilet seat casing 410.

  Further, when the heat-resistant insulating layer 455 is provided between the back surface of the upper toilet seat casing 410 and the metal foil 451, the heat-resistant insulating layer 455 can more reliably insulate the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. Can do.

  Further, since the connecting portion 475 between the lead wire 470 and the linear heater 460 is provided between the metal foil 451 and the metal foil 453, the heat generation at the connecting portion 475 between the lead wire 470 and the linear heater 460 is generated by the metal foil 451. , 453. Thereby, the temperature of the seating surface 410U can be raised more rapidly.

  Moreover, since the connection part 475 is coat | covered with the heat-resistant sheet | seat 480, the connection part 475 and the upper toilet seat casing 410 can be insulated reliably.

  Furthermore, since the connection part 475 is coat | covered with a silicone resin, the connection part 475 can be reliably waterproofed.

  Since the high tensile strength heater wire made of an Ag—Cu alloy is used as the heating wire 463a of the linear heater 460, the diameter of the heating wire 463a can be reduced while ensuring the strength of the heating wire 463a. Accordingly, the long heating wires 463a can be arranged at a high density in a narrow space. As a result, the temperature increase rate of the seating surface 410U can be improved.

  INDUSTRIAL APPLICABILITY The present invention can be used for a sanitary washing device for washing a local part of a human body.

1 is an external perspective view showing a toilet seat device and a sanitary washing device including the toilet seat device according to an embodiment of the present invention. Front view of the remote control device of FIG. Schematic diagram showing the configuration of the toilet seat device Disassembled perspective view of toilet seat (A) is a plan view of the toilet seat heater of the toilet seat portion of the first example (b) is an enlarged plan view of the region (a) The top view of the toilet seat part of the 1st example C73-C73 sectional drawing of the toilet seat part of FIG. (A) is a plan view of the toilet seat heater of the toilet seat portion of the second example (b) is an enlarged plan view of the region (a) Plan view of toilet seat part of second example The top view of the toilet seat heater of the toilet seat part of the 3rd example The principal part perspective view of the thermostat attachment part of the toilet seat part of the 3rd example Exploded perspective view of thermostat mounting portion of third example Sectional drawing of the thermostat attachment part of the 3rd example The disassembled perspective view of another structure of the thermostat attachment part of the 3rd example The disassembled perspective view of another structure of the thermostat attachment part of the 3rd example Sectional drawing of the temperature fuse attachment part of the 3rd example The top view of the toilet seat heater of the toilet seat part of the 4th example The top view of the toilet seat heater of the toilet seat part of the 5th example Sectional drawing which shows the 1st example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the 2nd example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the 3rd example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the 4th example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the 5th example of the structure of the toilet seat heater attached to an upper toilet seat casing A graph showing the measurement results of the relationship between the coating thickness of the heating wire and the temperature rise of each part of the toilet seat Schematic diagram showing how to connect the linear heater and lead wire Sectional view of the connection between the linear heater and the lead wire Schematic diagram showing thermal caulking method Example of toilet seat heater drive and graph showing changes in toilet seat surface temperature (A) is a waveform diagram of a current flowing through the toilet seat heater during 1200 W drive, and (b) is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit during 1200 W drive. (A) is a waveform diagram of the current flowing through the toilet seat heater during 600 W drive, and (b) is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit during 600 W drive. (A) is a waveform diagram of a current flowing through the toilet seat heater during low power driving, and (b) is a waveform diagram of an energization control signal provided from the energization rate switching circuit to the heater driving unit during low power driving. Sectional drawing showing a conventional toilet seat device

Explanation of symbols

100 Sanitary washing device 110 Toilet seat device 400 Toilet seat part (toilet seat)
410U Seating surface 450 Toilet seat heater 450Q Thermostat 450U Through hole 451, 453 Metal foil 460 Linear heater 462 Insulation coating layer 490 Heater holder 490a, 490c Fixing protrusion 491 Thermostat holder 491a Thermostat holder 491b Fixed sheet 492b Waterproof sheet 492b Sheet (waterproof sheet)
492c Lower waterproof sheet (waterproof sheet)
500 Lid (toilet lid)

Claims (5)

A toilet seat having a seating surface and including a metal material; a toilet seat heater provided in close contact with a back surface of the seating surface of the toilet seat; and a thermostat for preventing the toilet seat heater from being overheated, the toilet seat heater comprising two sheets A linear heater provided with an insulating coating layer is arranged in a predetermined arrangement pattern between metal foils, and the thermostat is arranged on the heater holder arranged on the seating surface side of the toilet seat heater and on the other surface side. A toilet seat device characterized in that it is clamped by a provided thermostat holder and fixed in close contact with the toilet seat heater. The heater holder includes a plurality of fixing protrusions provided at intervals, the thermostat holder includes a fixing hole corresponding to the fixing protrusion and a thermostat holding portion, and the toilet seat heater includes a through hole corresponding to the fixing protrusion, The toilet seat device according to claim 1, wherein a fixing protrusion is inserted into the through hole and the fixing hole, and a distal end portion of the fixing protrusion is deformed and fixed. The toilet seat device according to claim 2, wherein the end face of the through hole of the toilet seat heater is waterproofed. The toilet seat device according to any one of claims 1 to 3, wherein the thermostat of the toilet seat heater is provided with a linear heater arrangement pattern having a higher density than other regions. A sanitary washing device comprising the toilet seat device according to any one of claims 1 to 4, a washing device, a washing water supply mechanism, and a toilet lid.