JP2777744B2 - Seating detection device for sanitary washing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a sanitary washing device for injecting warm water into a local part of a human body after a stool and sanitarily cleaning the local part. The present invention relates to a seating detection device of a sanitary washing device in which washing water heated to an appropriate temperature is not spouted even if a washing switch is operated unless the toilet seat is placed on the toilet seat placed above.

[Conventional technology]

In recent years, washing water (warm water) where the local area after stool is heated to an appropriate temperature
There has been a remarkable spread of sanitary washing apparatuses that perform more hygienic and comfortable washing. In the above-mentioned sanitary washing device, for example, as shown in FIG. 1 and FIG. 2, a horizontally long control box 3 is mounted on the rear upper surface of a Western toilet 2 on which the toilet seat 1 is mounted so as to be able to move up and down. 3, a water supply pipe 4 connected to a water supply source (not shown) is provided via a solenoid valve 5 and a heating device 6 for heating the cleaning water to an appropriate temperature. Is mounted so as to be able to advance and retreat at a predetermined angle toward the inside of the toilet 2.

In use, the cleaning water is heated by a heater 10 attached to a heating device 6 and connected to a commercial power supply 8 via a switching element 9 as shown in FIG. Is detected by a temperature sensor (not shown),
This detection signal is sent to the control device 11, and a gate signal is sent from the control device 11 to the switching element 9 based on the detection signal so as to control the energization, so that the washing water flowing into the heating device 6 can be used. The cleaning water is heated to an appropriate temperature, and the cleaning water is ejected from a local eye-sighting nozzle 7 of the human body to sanitarily clean the local area of the user.

At the time of operating the sanitary washing device, as shown in FIG. 2, an operation case extended at one end of the control box 3 to accommodate the control device 11 and the power supply device 12 (see FIG. 9). Push button type switch S ₁ "wash"
S ₂ "dry" · S ₂ of the "seat", for example, when the switch S _1, which is labeled "washed" to introduce the washing water through the water supply pipe 4 from the water supply source solenoid valve 5 is opened Heating device 6
The washing water is buried in the heating device 6 and is instantaneously heated to a temperature suitable for washing by the heater 10 which is controlled to be energized by a command from the control device 11 and is ejected from the nozzle 7. After washing the private parts, when stopping the jetting of washing water, when interrupting the closing state by pushing the switch S ₁ again, the solenoid valve 5
Closes to stop the flushing of water.

Moreover, by operating the switch S _2, labeled as "dry", and driven hot air machine (not shown), hot air is ejected toward the private parts, to dry the wet by washing local. or,
To warm toilet seat 1, switch S ₃ labeled "Toilet seat"
Is operated to energize a heater (not shown) wired in the toilet seat 1 to warm the surface of the toilet seat 1 to a comfortable temperature suitable for seating.

The power supply device 12 shown in FIG. 9 includes a power transformer 13 having a primary side connected to the commercial power supply 8 and a diode bridge 14 having an AC input terminal connected to the secondary side of the transformer 13.
When, a smoothing capacitor C ₁ connected in parallel to the DC output terminal of the diode bridge 14, voltage regulator AVR, this is constituted by a voltage regulator AVR output end and the smoothing capacitor C ₂ connected between the ground, the commercial power supply A DC constant voltage power supply Vcc that is stepped down and full-wave rectified is supplied to the control device 11 as an operation power supply.

[Problems to be solved by the invention]

However, in the above-mentioned sanitary washing device, when the electromagnetic valve 5 is opened when cleaning a local part, for example, the electromagnetic valve control device 16 shown in FIG. 10 is used. This solenoid valve control device
16, the relay X and the switch S ₁ which is inserted in series between ground and the constant voltage source Vcc, constituted by the diode D ₁ inserted between the terminals of the relay X, pressing the switch S _1, the relay X Is excited and its normally open contact Xa (for example, ninth
(The one inserted in the circuit of the solenoid valve 5 in the figure) was closed to open the solenoid valve 5. However, the solenoid valve control device
In the structure of 16, for example, when cleaning the toilet 2 or the like,
Alternatively, pressing the switch S _1, labeled as "washing" which is located in Yotashi before such a mistake on the operation housing 3a, it is opened electromagnetic valve 5 is immediately to the appropriate temperature from the nozzle 7 in a heating apparatus 6 In some cases, the heated washing water spouts out, causing the clothes of the cleaner or the like to get wet or the tray floor to be soaked in water.

In order to solve the above-mentioned problem, for example, a mechanical weight switch or a detection sensor such as infrared rays is attached to a portion corresponding to the upper surface of the toilet below the toilet seat, and when the user sits on the toilet seat, the user sits down according to the weight of the user. Or a seat can be detected by using an infrared or ultrasonic sensor mounted near the toilet seat. However, in the former case, it is not possible to distinguish the human body from the object, and even if the object is placed on the toilet seat, seating may be detected, or conversely, if the child is light, seating may not be detected reliably. there were. In the case of the latter, if a person or an object is brought close to the toilet seat, even if they do not sit on the toilet seat, the seat may be erroneously determined to be seated. As a result, the installation place is limited, and the sensitivity adjustment is always required at the time of installation, which is troublesome, and the detection circuit itself is complicated and expensive.
Thus, even if attached to the weight switch and a sensor, etc., often determines that incorrectly seated, in this case, a problem that when accidentally turning on the "wash" switch S _1, still cleaning water is ejected from the nozzle And could not be a solution for preventing erroneous operation.

The present invention has been made in view of the above-described problem, and allows a user to turn on a switch labeled “washing” of a sanitary washing device only when a user sits on a toilet seat, thereby opening an electromagnetic valve due to erroneous operation of the switch. Accordingly, it is an object of the present invention to provide a seating detection device for a sanitary washing device that prevents washing water from squirting out to wet user's clothes and the floor of a toilet.

[Means for solving the problem]

A seat detection device according to the present invention includes an oscillation circuit that outputs a sine wave high-frequency signal at a constant frequency, and a toilet seat temperature detection sensor (thermistor) that is disposed together with a heater on the inner surface of the toilet seat.
A pair of electrodes are formed using the lead wires of the above, and a choke coil for AC blocking, a capacitor for DC blocking, a resonance coil connected in series to one of these electrodes, and a choke coil and an oscillation coil for the other electrode. A sensor and a resonance circuit configured to include a DC blocking capacitor, and a detection / smoothing circuit that outputs a smoothed voltage by rectifying a current flowing through the resonance circuit to DC. A reference voltage setting circuit connected to the oscillation circuit to output a preset reference voltage, and a comparator having an open collector output, and an inverting input terminal connected to the output terminal of the reference voltage setting circuit. The non-inverting input terminal has a comparison circuit connected to the output terminal of the detection and smoothing circuit, a washing water spouting command circuit having a switch for “washing”, and one of the input terminals connected to the output terminal of the comparison circuit. The other of the power ends is sanitized by an AND circuit connected to the water discharge command circuit, an emitter-grounded transistor connected to the output terminal of the AND circuit, and a switch operation circuit having a relay for controlling an electromagnetic valve connected to the collector of the transistor. A seating detection device for preventing a malfunction in the cleaning device is configured, and its operation is as follows.

(Operation)

According to the present invention, a pair of seating detection electrodes is formed using a lead wire of a toilet seat temperature detection sensor, and when the seat is not seated on the toilet seat, an electrostatic force between the electrodes (between lead wires) is formed. Since the capacitance is only equivalent to the dielectric constant of air, the resonance frequency of the resonance circuit is high, that is, there is a large deviation from the oscillation frequency of the high-frequency signal output from the oscillation circuit at a constant cycle. Since only current flows, the voltage generated across the resonance coil is low. As a result, an "L" level signal is output from the output terminal of the comparison circuit. Is not excited. Therefore, even if the "wash" switch is turned on in this state, the solenoid valve is not opened and remains closed, so that the washing water is not spouted.

At this time, a high-frequency signal (AC) output from the oscillation circuit and an output (AC) from the toilet seat temperature detection sensor are superimposed and flow through the resonance circuit. However, since the output from the toilet seat temperature detection sensor is a direct current, the detection signal corresponding to the detected temperature is not hindered by the winding resistance of the choke coil, but is reduced by the resistance of the sensor. It can be output to a temperature controller.

On the other hand, when the toilet user is seated, the capacitance between the electrodes rapidly increases, whereby the resonance frequency determined by the capacitance between the electrodes and the resonance coil becomes the oscillation frequency output from the oscillation circuit. When they match or approach each other, a large resonance current flows through the resonance circuit, whereby the output from the comparison circuit changes from “L” level to “H” level. When the `` wash '' switch is turned on in this state, the solenoid valve is opened by the switch operation circuit, and washing water heated to an appropriate temperature is jetted from the nozzle to perform local washing. The solenoid valve does not malfunction even if the switch indicating "wash" is turned on by mistake when the toilet seat is not seated or when an object is simply placed on the toilet seat.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 to 6, the same reference numerals as those in FIGS. 1, 9 and 10 denote the same parts.

First, in FIG. 4, reference numeral 17 denotes a toilet seat warming heater disposed on the inner side surface of the toilet seat 1, and reference numeral 18 denotes a toilet seat temperature detecting sensor (thermist use, hereinafter referred to as a sensor) attached to the back of the toilet seat 1 near the heater 17. As shown in FIG. 6, the heater 17 is connected to a commercial power supply 19, and the sensor 18 is connected to a toilet seat temperature control device 28 that controls the heater 17 through a switching element 28a.

Next, a schematic configuration of the control device A of the sanitary washing device will be described with reference to FIG.

The power supply circuit 12 includes a commercial power supply 19, a solenoid valve 5, and a seating detection device.
The energization control of the heater 10 is controlled by a normally open contact Ya of the relay Y provided at 20 (see FIG. 5), the washing water heating heater 10 attached to the heating device 6, and a command signal from the energization control device 11 of the heater. The switching element 9 to be performed is connected in parallel with the primary side of the power transformer 13, and on the secondary side of the power transformer 13, the energization control device 11, the toilet seat temperature control device 28, and a seat It is provided with an output terminal for supplying a stable DC constant voltage power supply Vcc to each circuit constituting the detection device 20 and the sensor 18.

Next, the structure of the seating detection device 20 of the present invention will be described with reference to an electric circuit diagram shown in FIG.
Oscillation circuit 21, resonance circuit 22, detection and smoothing circuit
23, reference voltage setting circuit 24, comparison circuit 25, water discharge command circuit 2
6, the switch operation circuit 27. Next, the detailed configuration of each of the circuits 21 to 27 will be described with reference to FIG.

The oscillation circuit 21 receives a supply of the constant voltage power supply Vcc, and outputs a sine wave high frequency signal (for example, 500 KHz) from an output terminal thereof to a resonance circuit 22 described below and a reference voltage setting circuit 24 described later.
At a certain frequency.

Next, the resonance circuit 22 uses the lead wire of the sensor 18 to make one lead wire drawn from the sensor 18 an electrode A and the other lead wire to an electrode B, and the electrode A is a DC blocking capacitor. through C ₃ connected to an output terminal of the oscillation circuit 21,
Connecting the electrode B is the electrode A, and the choke coil 29 of the AC blocking the AC isolation between B and capacitor C ₄ DC blocking, the detection and smoothing circuit 23 to be described later by inserting the resonant coil 32 in series The choke coil 29 inserted and connected between the electrodes A and B has a high impedance with respect to a high-frequency signal (AC) output from the oscillation circuit 21 and has a high impedance with respect to the DC output from the sensor 18. Is used whose impedance is almost zero. For this reason, the toilet seat temperature detection signal detected by the sensor 18 is a voltage divided by the specific resistance of the sensor 18 and the ground resistance R connected to the electrode B via the second choke coil 29a for blocking AC. Is smoothly transmitted to the toilet seat temperature control device 28 without being hindered by the choke coil 29 as a voltage corresponding to the detected temperature.
Also, in the resonance coil 32 connected to the electrode B side, a high frequency signal output from the oscillation circuit 21 to the resonance circuit 22 by the choke coil 29 for separation hardly flows unless a human body is interposed between the electrodes A and B. The voltage generated at both ends of the resonance circuit 22 is very low. Therefore, the oscillation frequency output from the oscillation circuit 21 depends on the fact that the electrodes A and B are separated by the separation choke coil 29,
When a human body intervenes between B, the capacitance C rapidly increases. If a constant that matches the resonance frequency determined by the capacitance C and the inductance L of the resonance coil 32 is selected, the user can use the toilet seat 1. When sitting on the resonance circuit 22
The resonance current flowing through the
It is possible to increase the voltage generated at both ends of 32.

Detection and smoothing circuit 23 connects the anode of the detection diode D ₂ to the connection point between the capacitor C ₄ of a DC blocking and the resonance coil 32, the cathode is connected in parallel with said resonance coil 32 resistance
R ₁ and the capacitor C ₆ are connected to each other, and the resonance current (AC output) flowing through the resonance circuit 22 is detected by the detection diode D ₂
Half-wave rectification by the resistor R ₁ and capacitor C ₆
The detection voltage (Vt) is output after being smoothed by the CR time constant set by.

Reference voltage setting circuit 24 is inserted and connected via a capacitor C ₅ DC blocking between the ground and the output terminal of the oscillation circuit 21, as a load for extracting the amplitude of the oscillation frequency from the oscillation circuit 21 as the AC voltage The second resonance coil 32 which plays a role
and a, and connect the anode of the detection diode D ₃ to the connection point of the second resonance coil 32a of the DC blocking capacitor C _5, a cathode is formed by connecting to the resistor R ₂ and capacitor C _7,
The oscillation frequency output from the oscillation circuit 21 is set to the second resonance coil.
32a by extraction as the AC voltage, performs half-wave rectification by the detection diode D ₃ to the AC, and the voltage set by the CR time constant by the resistor R ₂ and capacitor C ₇ (reference voltage) to the Vs. Note that the second reference voltage setting circuit 24
The reason why the resonance coil 32a is inserted and connected is that by using the same coil as the resonance coil 32 inserted and connected to the resonance circuit 22, the amplitude of the oscillation frequency output from the oscillation circuit 21 fluctuates, or , 33a, the output from the reference voltage setting circuit 24 and the voltage generated across the resonance coil 32 of the resonance circuit 22 change proportionately, so that the amplitude of the oscillation frequency and the like change. This is because even if it fluctuates, the error caused by the fluctuation can be ignored without having any adverse effect on the detection voltage Vt and the reference voltage Vs.

The comparison circuit 25 includes a comparator CP having an open collector output, and a reference voltage setting circuit 24 is provided at its inverting input terminal.
Is the output terminal connected also to the non-inverting input terminal connected to the output terminal of the detection and smoothing circuit 23, further, by connecting the output terminal of the comparator CP via the resistor R ₃ to the constant voltage source Vcc This comparator CP is a reference voltage input to the inverting input terminal.
Vs and the output of the detection and smoothing circuit 23 input to the non-inverting input terminal
When Vs <Vt, an "H" level signal is output from the output terminal, and when Vs≥Vt, an "L" level signal is output.

In addition, when the reference voltage Vs input to the comparator CP is not seated on the toilet seat 1, the output voltage from the detection / smoothing circuit 23 is lower than a certain level. Since the voltage is output, it is preferable to set a value of an intermediate level between these two voltages.

The water discharge command circuit 26 is provided between the constant voltage power supply Vcc and one input terminal of the AND element 34 of the switch operation circuit 27 described later.
A resistor R ₄ and a "wash" switch S ₁ constructed by inserting in series, when turning the switch S _1, and sends the "H" level signal from its output to the AND element 34.

The switch operation circuit 27 described above is connected to the output terminal of the comparison circuit 25 to one input terminal of the AND element 34, and to the output terminal of the water discharge command circuit 26 to the other input terminal.
Output end of the 34 ground the base of the transistor Q via the resistor R ₅ emitter grounded, and between the base of the resistor R ₅ and the transistor Q and the ground a resistor R _6, also, the collector and the constant voltage of the transistor Q together between the power supply Vcc to insert the relay Y in series, and constituted by connecting a diode D ₄ between the relay Y terminals, "H" level signal from the output terminal of the aND element 34 is output At this time, the transistor Q is turned on to excite the relay Y.

 Next, the operation will be described.

(1) When the user is not seated on the toilet seat 1 When the user does not sit on the toilet seat 1, the capacitance between the electrodes A and B is extremely small, and the lead wire of the sensor 18 is connected to the resonance circuit 22. Because of the presence of the separation choke coil 29 inserted and connected to the oscillating circuit 29, the output of the oscillation circuit 21 hardly flows because the impedance of the oscillation circuit 21 is high with respect to the high-frequency signal of a constant cycle output from the oscillation circuit 21.
However, since the separation choke coil 29 uses a signal whose impedance is almost zero with respect to the detection signal (DC) of the sensor 18, the detection signal of the toilet seat temperature output from the sensor 18 is The high-frequency signal output from the oscillation circuit 21 at a constant cycle is transmitted to the toilet seat temperature control device 28 via the second choke coil 29a for preventing AC without any adverse effect. Since the human body is not sitting on the toilet seat 1 between the electrodes A and B of the resonance circuit 22, the resonance frequency determined by the capacitance C between the electrodes A and B and the inductance L of the resonance coil 32, and the oscillation circuit 21 As shown in FIG. 8, the oscillation frequency of the high-frequency signal output from the oscillation circuit 21 is not equal to the oscillation frequency of the high-frequency signal output from the oscillation circuit 21 (see 21 and 22 in FIG. 7). The resonance current hardly flows within the frequency range. Therefore, the output Vt from the detection and smoothing circuit 23 is small, and the output Vs from the reference voltage setting circuit 24 is larger. Therefore, the output from the comparison circuit 25 has "L" since its input has a relationship of Vs> Vt. A level signal is output (see outputs 22 to 25 in FIG. 7). In this state, be charged to "wash" switch S ₁ of the water discharge command circuit 26, since the output terminal of the AND element 34 of the switch operating circuit 27 does not output only "L" level signal, the solenoid valve 5 is opened However, the washing water heated to an appropriate temperature does not blow out from the nozzle 7 (see the outputs of S ₁ and S 5 in FIG. 7).

(2) When the toilet seat 1 is seated As shown in FIG. 3, when the user P sits on the toilet seat 1 for refilling, the capacitance C between the electrodes A and B in the resonance circuit 22 becomes the capacitance of the human body. Does the resonance frequency rapidly increase due to the capacitance Cm, and the resonance frequency determined by the capacitance C between the electrodes A and B and the inductance L of the resonance coil 32 matches the oscillation frequency of the high-frequency signal output from the resonance circuit 21? Or, when they approach each other as much as possible, a large resonance current (AC output) flows through the resonance circuit 22, and the voltage across the resonance coil 32 is increased within the range of the oscillation frequency and output to the detection and smoothing circuit 23 (FIG. 7). See 22 outputs). The output is a detection diode
The D ₂ is half-wave rectified, and outputs to the comparator circuit 25 is smoothed by the CR time constant of the resistor R ₁ and capacitor C _6. The output voltage Vt from the detection and smoothing circuit 23 takes out the amplitude of the high-frequency signal as an AC voltage in a second resonance coil 32a connected to the oscillation circuit 21, and converts the AC voltage into a reference voltage setting circuit 24. Always set to a constant level voltage and compare circuit
Vs is compared with the reference voltage Vs input to the 25 comparators CP.
If there is a relation of <Vt, an “H” level signal is output from the output terminal of the comparison circuit 25. At the point when the "H" level signal is output from the comparison circuit 25, it is detected that the human body is seated on the toilet seat 1 (see outputs 23 to 25 in FIG. 7).

After the seating detection as described above, when the user P turns on the "wash" switch S ₁ of the water discharge command circuit 26 finishing Yotashi, "H" level signal from the water discharge command circuit 26 is outputted switch The signal is input to the AND element 34 of the operation circuit 27. Since the "H" level signal has already been input to the AND element 34 from the comparison circuit 25 as described above, an "H" level signal is output from the output terminal of the AND element 34 to turn on the transistor Q. (See the output of S ₁ , 34 in FIG. 7). By the ON operation of the transistor Q, a current flows between the constant voltage power supply Vcc → the relay Y → the collector / emitter of the transistor Q → the ground, exciting the relay Y and closing its normally open contact Ya. For this reason, the solenoid valve 5 is energized and opened by energization from the commercial power supply 18, and the cleaning water flowing into the heating device 6 is energized and controlled by the command signal from the energization control device 11 for the heater 10. It is heated to an appropriate temperature and discharged from the nozzle 7 to sanitarily clean the local area of the user P. To cancel the washing, by open water discharge command circuit 26 by introducing a stop switch "washing" turned the switch S ₁ again, or not shown, turns off the transistors Q, releases the excitation of the relay Y that When the normally open contact Ya is opened, the power supply to the solenoid valve 5 is cut off, and the solenoid valve 5 is closed to stop the discharge of the cleaning water heated to an appropriate temperature (see 5 in FIG. 7).

As described above, when a seat is detected by the seat detection device 20, a large resonance current (AC output) flows through the resonance circuit 22, but this current is a detection signal of the toilet seat temperature detected by the sensor 18. Since the detection signal is blocked by the second choke coil 29a provided at the portion to be transmitted, and the detection signal can be transmitted to the toilet seat temperature control device 28, the detection signal of the toilet seat temperature during the detection of seating, During the delivery, there is no adverse effect on the control of the toilet seat temperature due to the change caused by the resonance current.

In the case user P when away from the toilet seat 1 finishing Yotashi, or the rising inadvertently from the toilet seat 1, was charged with "wash" switch S ₁ by mistake at this time, the electrodes A, B
Since the human body is separated from the toilet seat 1, the capacitance C between them is smaller than when the user is sitting. Therefore, the resonance frequency determined by the capacitance C between the electrodes A and B and the inductance L of the resonance coil 32 and the oscillation frequency output from the oscillation circuit 21 are largely shifted and are not constant. Little current flows. Therefore, also "H" level signal from the water discharge command circuit 26 by introduction of "wash" switch S ₁ is output, since only the "L" level signal from the output terminal of the comparator circuit 25 does not output, the transistor Q Is not turned on, the relay Y keeps the non-excited state, and does not open the solenoid valve 5. Therefore, there is no possibility that the washing water at an appropriate temperature is ejected from the nozzle 7. This means, for example, that the toilet 2
During the cleaning of the toilet or when a heavy object such as a cleaning tool is placed on the toilet seat 1 or the like, the water discharge command circuit 26 is erroneously made as described above.
It is the same even if you put the "washing" switch S ₁ of.

〔The invention's effect〕

Since the present invention is configured as described above,
It has the following effects.

(1) The seating detection device of the present invention attaches a separation choke coil for dividing the lead wire into two parts to a lead wire of a sensor for detecting a toilet seat temperature, and forms a pair of electrodes on the lead wire. One is grounded to an oscillation circuit and the other is grounded to a resonance circuit provided with a resonance coil, so that a change in the capacitance that occurs when the user sits on the toilet seat is detected using the sensor lead wire. Therefore, the seating detection device can be easily and economically manufactured using existing members.

(2) Although the output from the oscillation circuit uses a high-frequency signal, the detection signal from the sensor is almost direct current, so the lead wire of the sensor is separated into two when forming a pair of electrodes. Since the value of the inductance of the choke coil can be increased, the pair of electrodes using the lead wires as the electrodes can be reliably separated, and the seating can be detected quickly and reliably.

(3) Further, the high-frequency signal from the oscillation circuit is transmitted to a resonance circuit provided with a lead wire for transmitting a detection signal of the temperature of the toilet seat, and the high-frequency signal is supplied to a 100 V line for energization such as a heater for heating the toilet seat. Because it has a structure that does not overlap,
There is no adverse effect such as noise disturbance on peripheral devices such as television receivers and fluorescent lamps.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a toilet with a sanitary washing device attached thereto, FIG. 2 is a schematic plan view thereof, FIG. 3 is a perspective view showing a state of use of the sanitary washing device, and FIG. Figure,
FIG. 5 is an electric circuit diagram of the seating detection device of the present invention provided in the sanitary washing device, FIG. 6 is an explanatory diagram showing a schematic configuration of the sanitary washing device provided with the seating detecting device of the present invention, and FIG. FIG. 8 is a frequency characteristic diagram in a seated state and a non-seated state, FIG. 9 is an electric circuit diagram used in a conventional sanitary washing device, and FIG. 10 is an electric circuit diagram of a solenoid valve control device. . 1 ... toilet seat, 18 ... toilet seat temperature detection sensor, 20 ... seat detection device, 21 ... oscillation circuit, 22 ... resonance circuit, 29 ... choke coil, 32 ... resonance coil

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hisayoshi Ota 1 Aichi-cho, Kasugai-shi, Aichi Prefecture Aichi Electric Co., Ltd. (72) Inventor Shokichi Fujii 1-Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. Inventor Hiroyuki Adachi 1 Aichi-cho, Kasugai-shi, Aichi Pref. Aichi Electric Co., Ltd. Examiner Masaaki Ieda (56) References Japanese Unexamined Patent Publication No. Sho 62-37433 (JP, A) Real opening No. 58-82200 (JP, U) 63-38897 (JP, U) Jiko 41-21421 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 9/00-9/16 A47K 13/30 A47K 13 /twenty four

Claims (2)

(57) [Claims] 1. A lead wire of a sensor for detecting a temperature of a toilet seat is divided into two by a choke coil to form a pair of electrodes for detecting a seat, and a change in capacitance between the electrodes for detecting a seat is detected to detect a human body. A seating detection device for a sanitary washing device, comprising a seating detection device for detecting a seating state of the user. 2. The sanitary washing device according to claim 1, wherein the choke coil has a characteristic of having a high impedance with respect to a high-frequency signal and having an impedance of substantially zero with respect to a toilet seat temperature detection signal. A seating detection device for a sanitary washing device.