JP2010029256A - Toilet seat device and sanitary washer using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide toilet seat heating which elevates the temperature of the sitting surface of a toilet seat in an extremely short time and is safe even if it fails. <P>SOLUTION: In a dense area portion 480 provided in the wiring pattern path of a toilet seat heater 450, the meandering length La of a meandering line L1 at the center part and the meandering pitch Pa of the center part of the dense area portion 480 are made the longest, the meandering length and the meandering pitch are gradually reduced from the center part to the end part, and the entire dense area portion 480 is closely attached to the heat sensing portion 470a and heat collector 470b of a temperature excess-rise preventing device 470. Thus, since a received heat amount in the heat collector 470b is also heat-transferred to the heat sensing portion 470a and a received heat amount in the heat sensing portion 470a is generally increased, energizing to the toilet seat heater 450 is safely shut off even upon abnormality, and the problem of the durability of the linear heating element 480a of the dense area portion 480 is dissolved simultaneously. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

In the conventional toilet seat device of this type, as shown in FIG. 19, the temperature of the toilet seat is raised to a predetermined temperature by the heating means 2 on the back surface of the metal toilet seat 1 to save energy (for example, see Patent Document 1). ). In other words, in this type of heated toilet seat, the heating means 2 has to be brought to a proper temperature quickly in a short period of time until it is energized and seated immediately before the user sits on the toilet seat to save power. Toilet seat 1 is used. Therefore, in the case of a heated toilet seat in which the buttock is placed directly and the temperature rises in a short time, when a situation occurs in which the energization of the toilet seat continues without stopping at a predetermined setting due to some abnormality, a relatively short time In other cases, the user may feel uncomfortable over the proper temperature, and the user needs to stand up from the toilet seat.
JP 2003-79539 A

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

  The present invention makes it possible to quickly detect an excessive increase in the temperature of the toilet seat and prevent the excessive increase in temperature even when some abnormality occurs and the temperature control of the toilet seat becomes impossible, thereby enabling a safe and long-life toilet seat device. And providing a sanitary washing device using the same.

  In order to solve the above-described conventional problems, a toilet seat device of the present invention includes a toilet seat having a seating surface and containing a metal material, a toilet seat heater in close contact with the back side of the seating surface of the toilet seat, and prevention of overheating of the seating surface. And the overheat prevention device has a heat sensitive part, and the toilet seat heater has a linear heating element arranged in a predetermined pattern, and a dense region arranged in a meandering manner in the path of the arrangement pattern The heat sensitive part is closely attached to the dense area part, and the dense area part arranged in a meandering manner is provided in the arrangement pattern of the linear heating element, and the meandering length and meandering pitch of the meandering line are provided. Is gradually changed from the central portion to the end portion, and a temperature responsive type overheat prevention device is provided in the dense region portion.

  With the above configuration, the toilet seat device according to the present invention quickly transfers heat from the dense region portion of the arrangement pattern to the overtemperature prevention device, and not only detects the overtemperature caused by any abnormality but also the dense region portion. Thus, it is possible to prevent partial heating of the linear heating element at, and to eliminate durability problems such as disconnection. Therefore, it is possible to provide a toilet seat device that is safe and can ensure a long life.

A first invention comprises a toilet seat having a seating surface and containing a metal material, a toilet seat heater in close contact with the back side of the seating surface of the toilet seat, and an overtemperature prevention device for the seating surface, The toilet seat heater includes a linear heating element in a predetermined pattern and a dense area portion arranged in a meandering manner in the path of the arrangement pattern. The dense region portion has at least the meandering length and meandering pitch of the meandering line at the center thereof. As a result, the meandering length of the meandering line at the center of the dense region portion is the maximum, so that the generated heat is quickly transferred to the center of the heat sensitive portion of the overheating prevention device, so that the temperature response of the overheating prevention device The speed can be increased, the temperature rise caused by some abnormality can be detected quickly, and the heat generation of the linear heating element can be stopped. In addition, since the meandering pitch of the meandering line at the center of the dense region is also maximized, the thermal interference with the adjacent meandering line is suppressed, preventing unnecessary high temperature in the dense region, and the linear shape of the dense region Durability problems such as disconnection of the heating element can also be solved. Therefore, it is possible to provide a toilet seat device that is safe and can ensure a long life.

  A second invention comprises a toilet seat having a seating surface and containing a metal material, a toilet seat heater in close contact with the back side of the seating surface of the toilet seat, and an overtemperature prevention device for the seating surface. The toilet seat heater includes a linear heating element in a predetermined pattern and a dense area portion arranged in a meandering manner in the path of the arrangement pattern. The dense region portion has at least the meandering length and meandering pitch of the meandering line at the center thereof. As a result, the meandering length at the center of the dense region portion is the smallest, for example, the meandering pitch is the smallest even if it is substantially the same as the maximum dimension of the heat sensitive portion. The temperature response speed of the overheat prevention device can be increased, the overheat caused by some abnormality can be detected quickly, and the heat generation of the linear heating element can be stopped. it can. In addition, since the meandering length of the meandering line at the center of the dense region is minimum, the linear expansion length due to heat generation can be reduced, thereby suppressing the thermal interference with the adjacent meandering line and making the dense region unnecessary. High temperature can be prevented, and durability problems such as disconnection of the linear heating element in the dense region can be solved. Therefore, it is possible to provide a toilet seat device that is safe and can ensure a long life.

  A third invention includes a toilet seat having a seating surface and containing a metal material, a toilet seat heater in close contact with the back side of the seating surface of the toilet seat, and an overtemperature prevention device for the seating surface, The toilet seat heater includes a linear heating element in a predetermined pattern and a dense area portion arranged in a meandering manner in the path of the arrangement pattern. The dense region portion is configured such that at least the meandering length of the meandering line at the center thereof is at the maximum, and each meandering bent portion is formed in a substantially horseshoe shape having a size larger than the meandering pitch. . As a result, similarly, since it is configured to promptly transfer heat to the heat sensitive part of the overheat prevention device, the temperature response speed of the overheat prevention device can be increased, and the overheat caused by some abnormality can be promptly increased. And the heat generation of the linear heating element can be stopped. In addition, since the meandering pitch of the meandering line at the center of the dense region is also maximized, the thermal interference with the adjacent meandering line is suppressed, preventing unnecessary high temperature in the dense region, and the linear shape of the dense region Durability problems such as disconnection of the heating element can also be solved. Furthermore, since each meandering bent portion is formed in a substantially horseshoe shape having a size larger than the meandering pitch, excessive bending of each meandering end portion when forming the dense region portion is prevented, and the overall durability of the linear heating element. Can be secured. Therefore, it is possible to provide a toilet seat device that is safe and can ensure a long life.

  According to a fourth aspect of the invention, in particular, in any one of the first to third aspects, the meandering pitch of the dense region portion of the toilet seat heater is gradually changed from the central portion to the end portion of the dense region portion. As a result, heat can be transferred effectively without causing an abrupt temperature gradient not only in the center of the heat sensitive part but also in the entire heat sensitive part, and the position of the center of the heat sensitive part and the central part of the dense region part of the overheat prevention device Even if the relationship deviates to some extent, the temperature response speed of the overheat prevention device can be stably increased.

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

In a sixth aspect of the invention, in particular, in the fifth aspect of the invention, the overheat prevention device is obtained by fitting a heat collector made of a good heat conductor so as to surround the periphery of the heat sensitive portion. As a result, when any heat transfer is made to the heat collector, the heat is also transferred to the heat sensitive part at the same time, increasing the total amount of heat received by the heat sensitive part. The response speed can be further increased, and the apparatus can be quickly stopped when an abnormality occurs.

  In a seventh aspect of the present invention, in particular, in any one of the fifth to sixth aspects of the invention, the overtemperature prevention device is configured such that the heat collector is brought into contact with the dense region of the toilet seat heater. As a result, the heat collector collects heat without wasting heat from the linear heating element around the heat sensitive part and transfers the heat together with the heat sensitive part. It can be done quickly, and the equipment can be stopped immediately when an abnormality occurs.

  According to an eighth invention, in particular, in any one of the fifth to seventh inventions, the dense region portion of the toilet seat heater is shielded by the heat collector of the overheat prevention device. As a result, all the heat generated from the dense region of the toilet seat heater is absorbed by the heat collector and the heat sensitive part, and the temperature response speed of the overheat prevention device can be increased. In addition to being able to stop, it is possible to provide a toilet seat device that can prevent excessively high temperature in the dense region and can ensure a safe and long life.

  The ninth aspect of the invention includes the toilet seat device and the main body in any one of the first to eighth aspects of the invention. Thereby, the abnormal temperature rise which arose in the toilet seat can be detected and cut off by a safety device with a fast response speed, and a safe and comfortable sanitary washing device can be provided.

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

(Embodiment 1)
1 is a sectional view of a schematic configuration of a toilet seat apparatus according to Embodiment 1 of the present invention, FIG. 2 is a front view of a toilet seat heater used in the toilet seat apparatus, FIG. 3 is an exploded perspective view of the entire toilet seat, and FIG. FIG. 5 is a partially enlarged view of the region E in FIG. 2, FIG. 6 is a partially enlarged sectional view of the linear heating element, and FIG. 7 is an example of another linear heating element. FIG. 8 is a conceptual diagram of a control block of the toilet seat device, FIG. 9 is a perspective view of the overheat prevention device, FIG. 10 is an enlarged view of the portion indicated by the area F in FIG. FIG. 12 is a partial enlarged cross-sectional view of the mounting portion of the overheat prevention device, and FIG. 12 is a temperature rise characteristic diagram of the overheat prevention device and the seating portion.

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

  1 to 12, a toilet seat 400 includes a toilet seat base 420 made of a synthetic resin, a seating surface 410U formed of a metal having high thermal conductivity such as aluminum, and a toilet seat between the toilet seat base 420 and the seating surface 410U. In the configuration in which the heater 450 is interposed, the toilet seat heater 450 has the adhesive layer 452a attached and fixed to a fixed position on the inner surface of the seating surface 410U. The toilet seat heater 450 is equipped with a thermistor 401a for adjusting the temperature of the normal seating surface 410U. Further, the toilet seat heater 450 has a linear heating element 460 wired in a fixed pattern, and a part of the pattern is a thermostat 470 including a thermostat 470 having a bimetal switch (not shown) therein. It is a dense region portion 480 that contacts the heat-sensitive portion 470a of 470 and heat concentrates on the heat-sensitive portion 470a. On the other hand, the controller 90 has a signal input 600a from the human body detection sensor 600, a seating signal input 610a, an output from the thermistor 401a, and an energization path for the toilet seat heater 450 via an overtemperature prevention device 450Q therebetween. It is connected.

As shown in FIGS. 2 and 5, the linear heating element 460 is arranged in a meandering shape that meanders in the left-right direction in accordance with the shape of the seating surface 410U. The linear heating element 460 is arranged so that the meandering bent portion is positioned in the vicinity of the outer side and the inner side of the seating surface. Specifically, one continuous linear heating element 460 is divided into a first series A linear heating element 460a and a second series B linear heating element 460b, and both are arranged substantially in parallel. Has been. In this arrangement, since the line interval between the bent portions is short, the change in the line length of the linear heating element 460 due to thermal expansion and contraction becomes small, and the thermal stress due to thermal expansion and contraction is buffered at the bent portion. In this configuration, disconnection is suppressed. Note that the lengths La and Lb of the bent portions in the region E in FIG. 2 and the interval S between the bent portions can be arbitrarily adjusted, and thereby the heating distribution of the toilet seat heater 450 can be adjusted. For example, the lengths La and Lb of the bent portions and the spacing S between the bent portions are adjusted so that the heating density in the vicinity of the outer side and the inner side of the toilet seat heater 450 is higher than the heating density in the central portion of the toilet seat heater 450. In addition, a uniform heating temperature can be maintained in almost the entire region of the toilet seat heater 450.

  Further, in this example, the current direction in the first series A linear heating element 460a is opposite to the current direction in the first series B linear heating element 460b, and therefore both the linear heating elements 460a. The magnetic field generated from 460b tends to be canceled, and as a result, generation of noise and the like is suppressed.

  In FIG. 6, the seating surface 410U is formed of, for example, an aluminum plate 413 having a thickness of 1 mm. On the upper surface of the aluminum plate 413, an undercoat layer 412 and a surface decorative layer 411 are formed in two layers with a thickness of about 0.08 to 0.14 mm, and the lower surface is coated with a thickness of about 0.06 to 0.1 mm. A film 414 is formed. In this example, the undercoat layer 412, the surface decorative layer 411, and the lower surface coating film 414 are made of a polyester resin material having a heat resistance of about 150 ° C. In addition to the aluminum plate 413, any one or a combination of a copper plate, a stainless steel plate, an aluminum-plated steel plate, and a zinc-aluminum-plated steel plate may be used for the seating surface 410U.

  On the other hand, a toilet seat heater 450 is attached to the lower surface coating film 414 side of the seating surface 410U. The toilet seat heater 450 holds the above-described meandering arrangement by sandwiching the linear heating element 460 between the adhesive layer 452b side of the first metal foil 453 and the non-adhesive layer side of the second metal foil 451. It is a thing. As the first metal foil 453 and the second metal foil 451, for example, an aluminum foil having a relatively high thermal conductivity and a thickness of 0.05 mm is used. In addition, the first metal foil 453 and the second metal foil 451 have a higher thermal conductivity such as a copper foil. When a metal material is used, the heating performance as the toilet seat heater 450 increases.

  The linear heating element 450 includes a heating wire 463a having a substantially circular cross section, an enamel layer 463b, and an insulating coating layer 462. The outer peripheral surface of the heating wire 463a having a circular cross section is sequentially covered with the enamel layer 463b and the insulating coating layer 462. The enamel wire 463 is constituted by the heating wire 463a and the enamel layer 463b.

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

The enamel layer 463b, which is the first insulating coating of the heating wire 463a, is made of, for example, polyester imide (PEI) having heat resistance of 180 to 300 ° C. The film thickness of the enamel layer 463b is 0.02 mm or less, and is 0.01 to 0.016 mm in this embodiment. Such an enameled wire 463 sufficiently secures an electrical withstand voltage performance of 1 minute or more at 1000 V, which is an electrical equipment technical standard, even if the enamel layer 463b has a very thin film thickness of about 0.01 to 0.02 mm. be able to. In addition, if other materials such as enamel layer 463b are polyimide (PI) or polyamideimide (PAI), the heat resistance is further increased.

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

  Therefore, a linear heating element 460 is obtained in which a thin and thin insulating coating is formed on the heating line. The outer diameter remains in the range of 0.3 to 0.50 mm. In this example, the outer diameter can be about 0.35 mm, ensuring the withstand voltage, and conducting heat from the heating wire 463a to the metal foil 451 and the seating surface 410U. Can be done very quickly.

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

  FIG. 7 shows another configuration example of the linear heating element 460 in which a plurality of enamel wires 463 are twisted, and each enamel wire 463 is formed as a first insulating coating on a heating wire 463a having a diameter of 0.09 mm. An enamel layer 463b having a thickness of 0.01 mm is formed.

  Further, a double insulation structure is secured by forming a PFA layer 462 as a second insulation coating so as to surround a bundle of enamel wires 463.

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

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

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

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

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

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

  Next, in FIGS. 2 and 9 to 11, a dense region portion 480 in which the linear heating elements 460 meander at a high density is formed on one side (region F in FIG. 2) on the rear side of the toilet seat heater 450. An overtemperature preventing device 470 composed of a thermostat 470 incorporating a bimetal switch (not shown) is attached to 480. The thermostat 470 includes a return type and a non-reset type. When the return type is used, it is preferable to separately install a non-reset type overheat prevention device in the energization path to which the thermostat is connected. In this example, the overheat prevention device 470 (thermostat 450Q) uses a return type as an example, and a temperature fuse (not shown) is installed in the toilet seat heater 450 as a non-reset type overheat prevention device. In the over-temperature prevention device 470, the heat-sensitive portion 470a is formed of a substantially circular can-like heat good conductor. The heat-sensitive portion 470a is fitted with a flange-shaped heat collector 470b made of a good heat conductor so as to surround the periphery of the heat-sensitive portion 470a, and the heat-sensitive portion 470a and the heat collector 470b are in close contact with the dense region portion 480.

  The configuration of the meandering portion of the dense region portion 480 is a meandering portion in which parallel lines are repeated, and the line length La of the meandering line L1 at the center of the dense region portion 480 and the meandering pitch Pa are arranged at the maximum. The portion 480 is gradually reduced from the center to the end.

  Further, the basic positional relationship between the heat sensitive part 470a and the meandering line L1 at the center is set so that the midpoint of the meandering line L1 is located at the substantially central part of the heat sensitive part 470a. In this example, the heat sensitive part 470a of the overheat prevention device 470 has a diameter of 16 mm, and the entire dense region part 480 indicated by a broken line in FIG. 10 is in close contact with the heat sensitive part 470a and the heat collecting part 470b. Therefore, the setting range of the meandering length La of the meandering line L1 at the center is set between 28 and 34 mm. The meandering pitch Pa at the center of the dense region 480 is in the range of 2 to 2.5 mm, and the meandering length and meandering pitch are adjusted from the center so that the number of contact lines with the heat sensitive part 470a is nine. In this manner, the entire dense region 480 is shielded by the heat collector 470b so as to be in close contact with the heat sensitive portion 470a and the heat collector 470b. This is because the heat sensitive part 470a receives a certain amount of heat even when the positional relation between the heat sensitive part 470a and the dense area part 480 varies by about 1 to 2 mm from the relationship between processing accuracy and assembly precision. is there. Furthermore, by interposing a heat conduction auxiliary material such as heat conduction promoting grease or a heat conduction promoting sheet between the dense region portion 480 and the heat sensitive portion 470a, the amount of heat received by the heat sensitive portion 470a can be further increased. is there. Incidentally, in this example, a silicon-based thermal conductive grease having a thermal conductivity of 0.8 to 1 W / m · K is used.

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

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

  FIG. 12 is a result of measuring the detected temperature of the overheat prevention device 470 and the surface temperature of the seating surface 410U when the linear heating element 460 is energized on the assumption that the control unit 90 has failed. In FIG. 12, curves (A) and (A ′) are the surface temperature of the seating surface 12, and curves (B) and (B ′) are the detected temperatures of the overheat prevention device 470. When energization of the linear heating element 460 is started, the surface temperature of the seating surface 410U reaches the toilet seat maximum set temperature (T1) at time t1. Normally, when (T1) is reached, energization is stopped by a command from the control unit 90, but if any abnormality occurs, the energization is continued as it is. If the OFF operating temperature of the over-temperature prevention device 470 is set to (T3), the surface temperature of the seating surface 410U is equal to or higher than the toilet seat maximum set temperature (T1), and it can be determined that the temperature is abnormally reliably increased ( When T2) is reached, the bimetal switch inside the overheat prevention device 470 reverses and cuts off the energization to the linear heating element 460. At this time, the temperature of the seating surface 410U and the overheat prevention device 470 continues to overheat for (t2-t1) seconds due to the thermal diffusion action on the seating surface 410U. Here, it is very difficult to set the OFF operation temperature of the overheat prevention device 470 to the crossing 0 in consideration of manufacturing and cost, and the tolerance is generally set to ± 2 ° C. .

  That is, when the tolerance is taken into consideration, the OFF operation temperature of the overheat prevention device 470 is (T3) to (T3 + 4). If the OFF operation temperature is (T3 + 4), the curves of the temperature of the seating surface 410U and the detected temperature of the overheat prevention device 470 are (A ′) and (B ′), and the overtemperature prevention device 470 is turned on at time t3. Operates and the energizing circuit is shut off. In this case, the overheating is continued for (t3-t1) seconds. That is, in consideration of the variation in the OFF operation temperature of the overheat prevention device 470, the time for overheating is the shortest (t2-t1) seconds and the longest (t3-t1) seconds. In consideration of safety, the circuit must be shut off as quickly as possible when the temperature rises excessively. Therefore, the time (t3-t1) can be shortened by increasing the slope of the curve (B), that is, by increasing the temperature response speed of the overtemperature prevention device 470, and the temperature of the seating surface 410U is excessive. Before it rises, the energization circuit to the linear heating element 460 can be cut off, and it can be used safely and safely in the event of an emergency.

  At this time, as shown in FIG. 10 and FIG. 11, the dense region 480 has the meandering length La of the meandering line L1 at the center and the meandering pitch Pa at the center of the dense region 480, and the line length and meandering pitch. Is gradually reduced to the end, and the entire dense region 480 is configured to be in close contact with the heat-sensitive portion 470a and the heat collector 470b. Therefore, the amount of heat received by the heat collector 470b is also transferred to the heat-sensitive portion 470a. The total amount of heat received at 470a can be increased.

  In short, when the calorific value per unit length of the meandering line L1 is the same, a calorific value proportional to the length of the meandering length La is generated and transmitted to the heat sensitive part 470a and the heat collector 470b. By maximizing the meandering length La of the meandering line L1 at the center of 480, heat generated at the center of the heat sensitive part 470a and the heat collector 470b can be maximized. Therefore, heat can be quickly transferred to the central portion of the heat sensitive part 470a of the overheat prevention device 470, heat transfer to the overheat prevention device 470 and operation of the overheat prevention device 470 can be accelerated, and any abnormality It is possible to quickly detect the temperature rise caused by the heat generation and to stop the heat generation of the linear heating element 460. Further, when the meandering length La of the meandering line L1 at the center of the dense region 480 is maximized, the amount of expansion of the meandering line L1 at the center of the dense region 480 is maximized, and the meandering line L1 expands due to the expansion. However, the meandering pitch Pa of the meandering line L1 at the center of the dense region 480 is also maximized, so that the pitch Pa, that is, the interval between the neighboring meandering lines L1 is wide, so that it is too close. Can be prevented. Therefore, it is possible to suppress thermal interference and prevent an unnecessary high temperature of the dense region portion 480, and to solve durability problems such as disconnection of the linear heating element 480a in the dense region portion 480.

In this example, in the case where the above-described abnormality occurs, it is possible to prevent overheating in consideration of the case where the seating surface 410U to which the toilet seat heater 450 is attached is reused by repairing the control unit 90 or other control-related parts. The device 470 uses a return type, and therefore, it is necessary to suppress damage to the linear heating element 480a of the dense meandering portion 480. Further, in this example, the meandering line L1 is configured such that the meandering pitch Pa at the center where the meandering length La is maximum is maximized, the meandering length is gradually shortened toward the end, and the meandering pitch is gradually narrowed. Yes. This is because the meandering length is shorter as it goes to the end, and the amount of deformation, that is, the amount of bending, in which the linear heating element deforms into a bow shape due to thermal expansion gradually decreases, so even if the meandering pitch is narrow, the adjacent meandering line And never too close. As described above, in the meandering line from the center to the end of the dense region 480, the meandering line is too close and a part of the linear heating element 480a is affected by the heat of the adjacent linear heating element 480a. Since heat interference that would cause an abnormally high temperature in part can be suppressed, unnecessary heating of the dense region portion 480 can be prevented, and durability such as damage and disconnection of the linear heating element 480a in the dense region portion 480 can be prevented. The problem can be solved, and the toilet seat heater 450 can be sufficiently reused.

(Embodiment 2)
13 is a front view of a toilet seat heater in the toilet seat device according to Embodiment 2 of the present invention, FIG. 14 is a partially enlarged view of a region G in FIG. 13, and FIG. 15 is an enlarged cross-sectional view of a mounting portion of the overheat prevention device. is there.

  The configuration, operation, and action of the toilet seat device according to Embodiment 2 of the present invention will be described with reference to the above drawings.

  13 to 15, the difference from the first embodiment is that the meandering length Lb of the meandering line L2 and the meandering pitch Pb at the center of the dense area 481 indicated by the G area of the toilet seat heater 450A are arranged to the minimum. However, the meandering length and meandering pitch of the dense region portion 481 are gradually reduced from the central portion to the end portion. In addition, the thing of the same code | symbol as Embodiment 1 has the same structure, and abbreviate | omits description.

  Similarly to the first embodiment, when an abnormality occurs in the control unit 90 and the energization control to the toilet seat heater 450A becomes impossible, the overheat prevention device 470 is activated in the same manner, and the energization to the toilet seat heater 450A is performed. The circuit can be cut off and the user can be prevented from being thermally injured. At this time, as shown in FIG. 14 and FIG. 15, the dense region portion 481 has the meandering length Lb of the meandering line L2 in the central portion and the meandering pitch Pb of the central portion of the dense region portion 481 as the shortest. And the dense region portion 481 as a whole is in close contact with the heat-sensitive portion 470a and the heat collector 470b, so that the meandering length LB is minimum, for example, approximately the same as the diameter of the heat-sensitive portion 470a. Since the meandering pitch Pb is also minimum, the heat generated in the dense region portion 481 is promptly transmitted to the center of the heat sensitive portion 470a of the overtemperature prevention device 470, so that the temperature response of the overtemperature prevention device 470 is obtained. The speed can be increased, an excessive temperature rise of the seating surface 410U caused by an abnormality can be detected quickly, and the energization circuit to the toilet seat heater 450A can be shut off.

That is, the dense region portion 481 has the meandering length Lb of the meandering line L2 in the central portion and the meandering pitch Pb in the central portion of the dense region portion 481 as the shortest, and the meandering length and meandering pitch are gradually increased to the end portion. Since the entire 481 is configured to be in close contact with the heat sensitive portion 470a and the heat collector 470b, the dense region portion 481 has a minimum meandering length Lb of the meandering line L2 and a meandering line L21 (one side). However, since the meandering pitch Pb is the narrowest pitch, the calorific value per unit area, that is, the heat density can be maximized. Therefore, heat can be quickly transferred to the central portion of the heat sensitive part 470a of the overheat prevention device 470, heat transfer to the overheat prevention device 470 and operation of the overheat prevention device 470 can be accelerated, and any abnormality It is possible to quickly detect the temperature rise caused by the heat generation and to stop the heat generation of the linear heating element 460. In addition, the dense region portion 481 has the minimum meandering length Lb of the meandering line L2 at the center, so that the linear expansion length due to heat generation can be reduced, thereby suppressing the heat interference with the adjacent meandering line and unnecessary high temperature. And the durability problem such as damage or disconnection of the linear heating element 481a in the dense region 481 can be eliminated, and the toilet seat heater 30 can be sufficiently reused.

(Embodiment 3)
16 is a front view of a toilet seat heater in the toilet seat apparatus according to Embodiment 2 of the present invention, and FIG. 17 is a partially enlarged view of a region H in FIG.

  The configuration, operation, and action of the toilet seat device according to Embodiment 3 of the present invention will be described using the above drawings.

  16 and 17, the difference from the first embodiment is the dense region 482 indicated by the H region of the toilet seat heater 450B, where the meandering pitch of each meandering line of the dense region 482 is a constant Pc, The meandering length Lc of the meandering line L3 is maximized, the meandering length of the dense region 482 is gradually increased from the center to the end, and each meandering end has a substantially horseshoe shape larger than each meandering pitch. This is configured as part X. In addition, the thing of the same code | symbol as Embodiment 1 has the same structure, and abbreviate | omits description.

  Similarly to the first embodiment, when an abnormality occurs in the control unit 90 and the energization control to the toilet seat heater 450B becomes impossible, the overtemperature prevention device 470 is activated in the same manner, and the energization to the toilet seat heater 450B is performed. The circuit can be interrupted and the user can be prevented from being thermally injured. At this time, as shown in FIG. 17, each meandering end portion is formed into a substantially horseshoe-shaped portion X having a size larger than the meandering pitch Pc. Therefore, when the dense region portion 482 is formed in the wiring process, Bending can be prevented and the overall durability of the linear heating element 482a of the densely meandering portion 482 can be secured.

(Embodiment 4)
FIG. 18 is an external perspective view showing a sanitary washing device according to Embodiment 4 of the present invention, and includes any one of the toilet seat devices shown in Embodiments 1 to 3.

  In FIG. 18, the sanitary washing device 900 installed in the toilet room is attached to the upper surface of the toilet bowl 700. The sanitary washing device 800 includes a main body 200, a remote operation device 300, a toilet seat 400, and a lid 500.

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

  When the user enters the toilet room, the human body detection sensor 600 (for example, a reflective infrared sensor) detects the infrared light reflected from the human body and detects the user's room entry.

  At that time, as described in the first embodiment, the seating surface 410U of the toilet seat 400 rapidly rises to a temperature at which the user does not feel cold, for example, within 6 seconds.

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

When the user operates the remote control device 300 after the stool is finished and sends a cleaning instruction as a signal to the main body 200, the cleaning device 800 directly connected to the cleaning water supply mechanism connected to the water pipe (not shown). Protrudes and washing water (arrow) spouts from the vicinity of the tip to wash the user's local area.

  Further, when the user operates the remote control device 300 after the cleaning is completed and sends a cleaning stop signal to the main body 200, the cleaning device 900 is accommodated in the main body 200.

  Finally, the user stands up from the seating surface 410U and leaves the toilet room.

  The above is an outline during normal use. When the user is seated on the seating surface 410U, the abnormality of the control unit 90 as described in the first embodiment occurs, and the energization to the toilet seat heater 450 is at a constant temperature. In the case where the operation continues without stopping, the overheat prevention device 470 and the dense region portion 480 of the toilet seat heater 450 cause the overheat prevention device 470 to operate quickly and secure safety for the user. .

  As described above, the toilet seat device of the present invention quickly transfers heat from the dense region portion of the arrangement pattern to the overtemperature prevention device, and quickly detects the overtemperature caused by the abnormality and cuts off the energization circuit. In addition, it can prevent the partial heating of the linear heating element in the dense area and eliminate the durability problem such as disconnection, so that a heated toilet seat that can be used safely is obtained. Can be applied as a general-purpose safety mechanism technology for heating equipment on which a person sits.

Sectional drawing of schematic structure of the toilet seat apparatus in Embodiment 1 of this invention Front view of toilet seat heater in the same embodiment The exploded perspective view of the whole toilet seat in the embodiment The state figure which stuck the toilet seat heater in the same embodiment on the seating surface Partial enlarged view of region E of toilet seat heater in the same embodiment Partial expanded sectional view of the linear heating element in the same embodiment Partial expanded sectional view of the other example of the linear heating element in the same embodiment Conceptual diagram of control block of toilet seat device in the embodiment Perspective view of the overheat prevention device in the same embodiment Partial enlarged view of region F of toilet seat heater in the same embodiment The expanded sectional view of the mounting part of the overheat prevention device in the embodiment Overtemperature prevention device and temperature rise characteristic diagram of seating portion in the same embodiment The front view of the toilet seat heater of the toilet seat apparatus in Embodiment 2 of this invention Partial enlarged view of region G of toilet seat heater in the same embodiment The expanded sectional view of the mounting part of the overheat prevention device in the embodiment The front view of the toilet seat heater of the toilet seat apparatus in Embodiment 3 of this invention Partial enlarged view of H area of toilet seat heater in the same embodiment External appearance perspective view which shows the sanitary washing apparatus in Embodiment 4 of this invention. Sectional drawing of the principal part of the conventional toilet seat apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 110 Toilet seat apparatus 200 Main body part 400 Toilet seat 410U Seating surface 450, 450A, 450B Toilet seat heater 460 Linear heating element 470 Overheat prevention device (thermostat)
470a Heat-sensitive part 470b Heat collecting body 480, 481, 482 Dense area part 480a, 481a, 481b Linear heating element in dense area part 900 Sanitary washing device L1, L2, L3 Meandering line in the central part La, Lb, Lc Meander length Pa, Pb Meander pitch in the center Pc Meander pitch

Claims (9)

A toilet seat having a seating surface and containing a metal material; a toilet seat heater in close contact with the back side of the seating surface of the toilet seat; and an overheat prevention device for the seating surface, wherein the overheat prevention device is a heat sensitive part The toilet seat heater has a linear heating element arranged in a predetermined pattern, and a dense region portion arranged in a meandering manner in the route of the arrangement pattern, and the heat sensitive portion is arranged in the dense region The toilet seat device is characterized in that the dense region portion is disposed at a maximum in the meandering length and meandering pitch of the meandering line in the central portion. A toilet seat having a seating surface and containing a metal material; a toilet seat heater in close contact with the back side of the seating surface of the toilet seat; and an overheat prevention device for the seating surface, wherein the overheat prevention device is a heat sensitive part The toilet seat heater has a linear heating element arranged in a predetermined pattern, and a dense region portion arranged in a meandering manner in the route of the arrangement pattern, and the heat sensitive portion is arranged in the dense region The toilet seat device is characterized in that the dense region portion is disposed at least in the meandering length and meandering pitch of the meandering line in the central portion thereof. A toilet seat having a seating surface and containing a metal material; a toilet seat heater in close contact with the back side of the seating surface of the toilet seat; and an overheat prevention device for the seating surface, wherein the overheat prevention device is a heat sensitive part The toilet seat heater has a linear heating element arranged in a predetermined pattern, and a dense region portion arranged in a meandering manner in the route of the arrangement pattern, and the heat sensitive portion is arranged in the dense region The dense region portion has at least the meandering length of the meandering line at the center thereof, and each meandering bent portion has a substantially horseshoe shape larger than the meandering pitch. A toilet seat device. The toilet seat device according to any one of claims 1 to 3, wherein a meandering pitch of a dense region portion of the toilet seat heater is gradually changed from a central portion to an end portion of the dense region portion. The toilet seat device according to any one of claims 1 to 4, wherein the overheat prevention device is a thermostat. 6. The toilet seat apparatus according to claim 5, wherein the over-temperature prevention device is configured such that a heat collector made of a good heat conductor is fitted so as to surround the periphery of the heat sensitive part. 7. The toilet seat device according to claim 5, wherein the over-temperature prevention device contacts the heat collector with a dense region of the toilet seat heater. The toilet seat device according to any one of claims 5 to 7, wherein the dense region portion of the toilet seat heater is shielded by a heat collector of the overheat prevention device. The sanitary washing apparatus provided with the toilet seat apparatus of any one of Claims 1-8, and a main-body part.