JPH05269055A - Heated toilet seat - Google Patents

Abstract

PURPOSE:To prevent sewage from invading a toilet seat body and to reduce the number of processes such as parts fixing and waterproofing of parts. CONSTITUTION:In a structure that a heater unit 30 is molded and fixed integrally within a toilet seat 4, a temperature overrising preventing device 70 and a seating detecting device 35 are simultaneously molded and fixed at their mounting positions, and connecting parts of the respective members are sealed at the same time. As a result of this, such problems as reproduction of various germs and generation of bad smell can be solved, keeping the toilet seat sanitary. Further, parts including a heater can be protected from bad influences such as insulation, degrading or the like, keeping the parts safe. In addition, as the toilet seat is free from such inconveniences as clogging of dirts into spaces or recesses, cleaning is very easy and the toilet seat which is heated can be always kept sanitary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heated toilet seat that is mounted and fixed on a Western-style toilet or a heated toilet seat that is used in combination with a cleaning and drying device.

[0002]

2. Description of the Related Art A conventional heating toilet seat of this type has the structure shown in FIGS. FIG. 6 is an external perspective view showing a conventional heated toilet seat 2 mounted on a Western-style toilet 1, including a case 3 and a toilet seat that are fixed on the toilet 1 by housing a control circuit (not shown) and the like. The toilet seat 4 and the toilet lid 5 are rotatably attached via a rotating shaft 6.

Next, the internal structure of the toilet seat portion is shown in FIGS.
Described in. The shape of the section A of the toilet seat 4 of FIG. 6 is shown in FIG. 7, and FIG. 8 shows the entire shape and a partial cross section. JP-A-64-
As disclosed in Japanese Patent No. 32827, a string-shaped heater 8 is attached to a main body 7 forming a surface of a toilet seat 4 injection-molded with a synthetic resin.
Is formed into a horseshoe shape or a substantially O shape by fusion bonding to an aluminum laminate film 9 to form a planar heater unit 10, and a temperature fuse 11 for preventing overheating, or
After connecting with the wiring member such as the thermostat 12 and the lead wire 13 and the like, waterproofed by a vinyl chloride tube 14 or the like is applied to the back surface of the main body 7 with the double-sided adhesive tape 15
Alternatively, it is attached to the main body 7 with an adhesive (not shown) applied to the back surface of the aluminum laminate film, and a temperature detecting device such as a thermistor 16 is arranged and fixed at a predetermined position. Further, the joint parts 19 and 20 of the toilet seat back plate 17 which is another component injection-molded from the same synthetic resin are formed into a box shape by ultrasonic welding means or heat welding means, and then the leg rubber 18 is adhered. It constitutes the toilet seat.

Next, a human body seating detection device (not shown) provided in the flush toilet seat will be described. Generally, it is provided in the case portion 3 of the main body, and a method of operating a micro switch or a pressure sensor by the toilet seat rotation shaft 6 or a method of detecting seating without contact by reflection or blocking by a seated human body by infrared rays or ultrasonic waves and so on. Further, as a method not provided in the main body case portion 3, a practically open method 62-60675 is used.
As disclosed in Japanese Patent Publication, a micro switch or a pressure-sensitive sensor is attached to a leg portion integrally attached to a toilet seat back plate by a separate member, and the leg rubber is directly deformed by the load of the human body. Alternatively, a system of indirectly activating the microswitch or sensor has been put into practical use.

[0005]

However, in the above-mentioned conventional configuration, the heater unit 10 is attached to the back surface of the toilet seat body 7 and the two parts of the toilet seat body 7 and the back plate 17 are integrally welded, so that this welding is performed. Incomplete, joint 1
Water from urine, sewage, etc. will enter through the gap between 9 and 20.
In addition, once the sewage has entered, it does not easily escape to the outside, and it rots inside to cause the propagation of various bacteria and odor. Since the heater 8 and other parts are also adversely affected by insulation deterioration and the like, at least the connection parts of each part must be completely waterproofed. For each connection, a vinyl chloride tube 14 is used to perform high-frequency sealing and waterproofing. ing. For this reason, a large number of man-hours are required to individually make a plurality of connecting portions.

When a functional component such as seating detection is further added to the toilet seat 4 itself, such as a toilet seat for washing, the number of connecting parts is increased to inevitably increase man-hours. Therefore, there is a technical idea of integrally molding these components at the time of molding the toilet seat 4. However, in general injection molding so far, since the molten resin is injected at a high temperature and a high pressure, the heater unit 10 and these components are heated at a high temperature. And it could not be molded integrally because it could not stand the pressure and fell apart.

For this reason, the molding method of Japanese Utility Model Laid-Open No. 63-199699 is disclosed, but at least two molding machines and molds are required.

The present invention solves the above problems and improves workability in which splashed water of urine and sewage do not enter the inside of the toilet seat, and fixing of each component and waterproofing of the connecting portion can be performed simultaneously with molding of the toilet seat body. The purpose is to provide a heated toilet seat.

[0009]

In order to achieve the above object, the heated toilet seat of the present invention constitutes a back surface portion including a first molding layer of synthetic resin constituting the surface portion of the toilet seat body and the toilet seat leg portion. The heater unit is integrally formed and arranged and fixed between the second molding layer and the molding layer, and the heater unit includes a planar heater, a temperature detecting element for detecting a toilet seat temperature, an overheat prevention device, and a human body. A seating detection device for detecting the presence or absence of a seat and a wiring member for connecting the seating detection device, and the overheat prevention device, the seating detection device, and the connecting wiring member are molded and fixed to the toilet seat leg portion at the same time. Is.

[0010]

With the above structure, at the same time when the toilet seat body is molded, the heater unit and the components are fixed and the connecting portions of the respective members are completely covered with resin and sealed. In addition, the generation of gaps and the like prevents the invasion of water from urine and dirt into the toilet seat. As a result, the number of man-hours required for fixing each component or waterproofing, which is required in the conventional configuration, is reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

The structure of the heater unit 30 used in the present invention will be described with reference to FIG. The heater 31 is a cord-shaped heater having an outer diameter of 2 mm or less, which is made of copper-nickel alloy wire, stainless steel wire or the like in a spiral shape or a twisted wire shape, and is covered with silicon or Teflon outer skin. A non-woven fabric 32 made of flexible polyester or nylon of m ² or less and fixed in a horseshoe shape or a substantially O shape by sewing with a sewing machine is used. The heater 31 may be a print heater or another planar heater, and may be selected and used as appropriate.

Further, a thermistor 3 which is a temperature detecting element
3, a mounting portion 34 of the overheat prevention device, a micro switch (may be a pressure sensor) 35 which is a seating detection device
Also, the lead wire 36, which is a wiring member, and the heater 31 are connected in advance and arranged at a predetermined position. A printed wiring board (hereinafter referred to as a board) 38 is used for the mounting portion 34 of the overheat prevention device and the mounting portion 37 of the seating detection device.

The substrate 38 is used for fixing the heater 31, the lead wire 36, and the like, and for setting it in the mold by the positioning hole 39 provided in the substrate, and for protecting the functional parts such as the microswitch 35 from the molten resin. There is also.

Next, the manufacturing process and molding method will be described with reference to FIGS. FIG. 4 shows a well-known process model of the low-pressure forming method for easy understanding in principle. First, the upper mold half 50 and the lower mold half 5 opened as shown in FIG. 4a.
During the interval 1, the molten resin 52 is supplied from the gate 54 through the material supply passage 53 of the lower mold 51. Then, as shown in FIG. 4b, immediately after the supply, the upper and lower molds 50 and 51 are closed, the molten resin 52 is spread in the mold, and pressure molding is performed as shown in FIG. 4c.
Finally, the molds 50 and 51 are opened and the molded product is taken out. The present invention applies this molding method to integrally mold the heater unit 30.

That is, as shown in FIG. 5A, the lower mold 51 is provided with two gates 54 and 57. One gate 57 is constructed so that the gate 57 is closed by the upper mold 50 as shown in FIG. 5c. The other is a normal gate 54.

First, as shown in FIG. 5A, the heater unit 30 is first set on the lower mold 51. The heater unit 30 has a through hole 40 shown in FIG. When the heater unit 30 is set on the lower mold 51, the seating detection device 35 and the substrate 38 of the overheat prevention device 70 shown in FIGS.
The through hole 39 is set in the positioning pin 58 of No. 1. Next, as shown in FIG. 5b, from the gate 54 of the lower mold 51 of the half-open mold in which the heater unit 30 is set, PP or AB
A fixed amount of molten resin 52 made of S or the like is supplied. The molten resin 52 supplied at this time is supplied to the lower surface of the heater unit 30. Further, when it is compressed by the upper mold 50 and cooled in the process of FIG. 5c, the shape of the back surface of the toilet seat is obtained. Here, the heater unit 30 is adhered to the resin, and the components of the heater unit 30 are the thermistor 33, which is a temperature detection device, the overheat prevention device 70, and the mounting portion 3 of the seating detection device 35.
4 and 37 are also fixed at the same time, and each connecting portion is completely covered with resin and sealed.

Next, in the process of FIG. 5d, the mold is opened again, the gate 57 is opened, and a certain amount of the molten resin 52 is again supplied to the upper side of the heater unit 30 from the supply path 56, and FIG.
If it is compressed again and cooled like f, the toilet seat body 4 is molded. The molded product finally taken out is subjected to gate processing to complete the molding.

By such a process, the heater unit 30 is completely bonded between the resins.

Next, the construction of the toilet seat leg portion 63 to which the overheat prevention device 70 is attached in FIG. 1 will be described in detail. A first molding layer 61 of synthetic resin forming the front surface of the toilet seat body 4, a second molding layer 62 forming the back surface including the legs 63, a heater unit 30 arranged between the molding layers, and an overheating of the temperature. The mounting portion 34 of the prevention device 70, the thermal fuse unit 64, and the leg rubber 18 having a waterproof function are included.

The mounting portion 34 is a substrate 38, and the through-hole 6 is provided so that the thermal fuse unit 64 can be mounted later.
The positioning holes 39 corresponding to the five connection pins 66 and the mold positioning pins 58 are provided and embedded in the second molding layer 62.

The thermal fuse unit 64 has connection pins 66.
Is a separate component in which the temperature fuse 70 is soldered 72 by means of a hole 71 through which is inserted and a pin 69 which has been caulked and fixed to the substrate 68 beforehand, and is fixed by soldering afterwards.
Reference numeral 67 is a hole for fixing the leg rubber 18 using a mold positioning pin. Since the temperature fuse 70 can easily detect an abnormal temperature rise, the temperature fuse 70 is partially disposed in the recess 73 reaching the vicinity of the heater unit 30.

In the embodiment, the overheat prevention device 70 is shown as an example of the thermal fuse 70, but the thermal fuse 70 cannot be molded simultaneously with the main body due to the relationship between the fusing temperature and the molding temperature. .. For this reason, the method of unavoidably was adopted, but it goes without saying that simultaneous molding is also possible if the fusing temperature is raised above the molding temperature and the operating method is devised, or if the temperature rise prevention device 70 is a thermostat or the like. ..

Next, the structure of the toilet seat leg portion 63 to which the seating detection device is attached in FIG. 2 will be described in detail. The description of the same configuration as that in FIG. 1 is omitted. The seating detection device 35 includes a leg rubber 7 having a mounting portion 37 for attaching to the micro switch 35, a spring plate 77 for pushing the operating piece 76 of the micro switch 35, and an operating convex portion 78 that comes into contact with the upper surface of the toilet by seating.
It is composed of 9. The board 38 of the mounting portion 37 is provided with a hole 75 through which the foot 74 of the micro switch 35, which is a seating detection device, and a positioning hole 39 corresponding to the mold positioning pin 58, which is provided in the second molding layer. ing. The lead wire 36 is fixed to the foot 74 of the microswitch 35 by soldering. In this way, the internal components can be completely shielded from spilled water and sewage.

Since the present invention applies the above-mentioned low-pressure molding method,
Heater unit 3 that could not be achieved by general injection molding
It is possible to simultaneously mold 0 into a horseshoe shape or a substantially O shape with a substantially arcuate cross section. As described above, the structure of the heated toilet seat of the present invention does not rely on ultrasonic waves or heat welding as in the conventional structure, and therefore there is no gap due to the joint portion between the toilet seat body and the back plate, so that urine splashes, sewage, etc. Does not enter inside the toilet seat. Further, since the seating detection device and the device for preventing excessive temperature rise are provided in the leg portion of the toilet seat, it is not necessary to make the seating surface of the toilet seat thick, and it is not necessary to individually waterproof the connecting portions of the components and the like.

[0026]

As is apparent from the above embodiments, the heated toilet seat of the present invention has the following effects. (1) Simultaneously with the molding of the toilet seat body, the fixing of the heater unit and constituent parts and the connection parts of each member are completely covered with resin and sealed, so there are no gaps and the like, and toilet seats for splashing urine and sewage Propagation of miscellaneous bacteria and generation of odor caused by internal invasion are eliminated. Further, since it does not adversely affect the heater and other parts such as insulation deterioration, it is safe and hygienic. (2) It is possible to reduce the number of steps required for fixing each component and waterproofing the component by the conventional configuration. (3) Since the toilet seat body has no gaps or recesses and is not clogged with dirt, cleaning is easy and the heated toilet seat can be maintained hygienically. (4) Since the seating detection device and the overheat prevention device are provided on the legs of the toilet seat, the wall thickness of the seat surface of the toilet seat can be reduced, the moldability of the resin is improved and the weight of the material is reduced. be able to. (5) When the operating temperature of the overheat prevention device is lower than the molding temperature of the resin, only the temperature fuse can be attached even after molding, so that an arbitrary temperature can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a toilet seat leg portion to which a heating toilet seat overheat prevention device according to an embodiment of the present invention is attached.

FIG. 2 is a cross-sectional view showing a configuration of a toilet seat leg to which a seating detection device for a heated toilet seat according to an embodiment of the present invention is attached.

FIG. 3 is a plan view showing the configuration of a heater unit of the present invention.

FIG. 4 is a general low-pressure molding process applied to the present invention.

FIG. 5 is a molding process according to an embodiment of the present invention.

FIG. 6 is an external perspective view of a heating toilet seat showing a conventional example.

FIG. 7 is a partial cross-sectional view of a conventional heated toilet seat.

FIG. 8 is a rear view and a partial cross-sectional view showing the internal structure of a conventional heated toilet seat.

[Explanation of symbols]

 4 Toilet Seat (Toilet Seat Main Body) 30 Heater Unit 31 Heater 33 Temperature Detection Element (Thermistor) 35 Seating Detection Device (Micro Switch) 36 Wiring Member 61 First Molding Layer 62 Second Molding Layer 63 Toilet Seat Leg 70 Device (thermal fuse)

Claims (5)

[Claims] 1. A first molding layer of synthetic resin constituting a surface portion of a toilet seat body, a second molding layer constituting a back surface portion including a toilet seat leg portion, and a heater unit fixed between the molding layers. The heater unit includes a sheet heater, a temperature detecting element for detecting the toilet seat temperature, an overheat prevention device, a seating detection device for detecting whether or not a human body is seated, and a wiring member for connecting them. A heating toilet seat in which the overheat prevention device, the seating detection device, and the connecting wiring member are simultaneously molded and fixed to the toilet seat leg. 2. The heated toilet seat according to claim 1, wherein the mounting portion of the overheat prevention device and the mounting portion of the seating detection device are molded and fixed to the toilet seat leg when molding the second molding layer. 3. The heated toilet seat according to claim 1, wherein the device for preventing excessive temperature rise is a thermostat. 4. The heated toilet seat according to claim 2, wherein the overheat prevention device is a thermal fuse. 5. The heated toilet seat according to claim 1, wherein the seating detection device is a microswitch or a pressure-sensitive sensor.