JPS5889225A - Apparatus for heating toilet seat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] It is related to

In most conventional toilet seat heating devices, the amount of energization of the heater that heats the toilet seat cannot be varied or can be manually varied. However, toilet seats are used by everyone, from children to the elderly, and even people with disabilities use them. However, there is a risk of low-temperature burns when using the toilet for a long time due to constipation, or when the elderly or disabled are forced to sit on the toilet seat for a long time until they defecate. Children, the elderly, and the disabled may not be able to use the heater even if it is equipped with a means to manually vary the energization level, and as a result, there have been cases of low-temperature burns. An object of the present invention is to provide a highly safe toilet seat heating device that does not cause low-temperature burns even when the toilet seat heating device is used for a long period of time.

In order to achieve the above object, the present invention includes human body detection means for detecting the presence or absence of a human body using a toilet seat, and a heater that energizes and turns on the heater after receiving a human body detection signal from the human body detection means. By adding a control circuit that reduces the pressure, the temperature of the heated toilet seat automatically decreases when the heated toilet seat is used for a long time, thereby eliminating the drawbacks of the conventional method by preventing low-temperature burns. It is.

Below, one embodiment of the toilet seat heating device of the present invention is shown in Figs. 1 to 6.
This will be explained according to the diagram.

FIG. 1 shows the external appearance of a toilet seat heating device according to an embodiment of the present invention, where 1 is a toilet bowl, 2 is a toilet seat, and this toilet seat 2 has a built-in heater (not shown).

3 is a storage box for storing a control circuit; 4 is the toilet seat 2;
6 is a human body detection means for detecting the presence or absence of the human body sitting on the toilet seat 2. Here, a micro switch is used that is turned on by the weight of the human body 40 sitting on the toilet seat 2. .

FIG. 2 shows a control circuit diagram in the above embodiment, where 6 is a heater built into the toilet seat 2 and heats the toilet seat 2, 7 is a phase control circuit that energizes the heater 6;
8 is an AC power supply, 9 is a capacitor, 10 is a trigger element, 1
1 is a power control element. 12 is an output voltage variable circuit;
This output voltage variable circuit 12 gradually lowers the output voltage vO in conjunction with the turning on of the microswitch 6. 13 is a capacitor, and 14 is an operational amplifier.

FIG. 3 is a correlation diagram of the toilet seat temperature and the elapsed time in the normal use state of the toilet seat in the above-mentioned embodiment, where the vertical axis shows the toilet seat temperature and degrees T, and the horizontal axis shows the elapsed time t. Ts is the set temperature, 'rn is the room temperature, to is the time when a person sits on the toilet seat 2, and 1. indicates the point at which a person stands. Similarly, tm indicates the time when a person sits on the toilet seat 2, and 1
．． indicates the point at which a person stands.

FIG. 4 is a correlation diagram between the toilet seat temperature and the elapsed time when the toilet seat is used for a long time in the above embodiment, and tp is the toilet seat 2.
indicates the point in time when the temperature becomes equal to the room temperature TR.

In the above configuration, when the toilet seat 2 is not in use, the contact point of the microswitch 6 is on the b side, so the output vo of the operational amplifier 14 of the output voltage variable circuit 1 is T
o(equal to l, and depending on the voltage the phase control circuit 7
The capacitor 9 is charged, the power control element 11 is triggered, and the heater 6 is energized with constant power. Therefore, as shown in FIG. 3, during the elapsed time toi, the temperature of the toilet seat 2 is maintained constant at the set temperature Ts and is on standby. time to
When a person sits on the toilet seat 2 at this point, the contact point of the microswitch 5 is switched to the a side. Then, as time passes, the capacitor 13 is charged and the output voltage vO of the operational amplifier 14 is gradually lowered, so that the charging speed of the capacitor 9 of the phase control circuit 7 gradually slows down.
As a result, the trigger phase of the power control element 11 is also delayed and the energizing amount of the heater 6 is gradually lowered. Therefore, as shown in FIG. 3, the temperature of the toilet seat 2 gradually decreases. After finishing using the toilet, when one stands up from the toilet seat 2 at time to, the microswitch 6 switches again to the b contact side, rapidly discharging the charge in the capacitor 13, and making the output voltage vO of the operational amplifier 14 equal to VCC again. Therefore, the temperature of the toilet seat 2 rises rapidly from the point to and reaches the set temperature 'rs.
to return to. At this time, the rate of decrease in the toilet seat temperature is gradual, and since the toilet seat time (to-to) is limited and short, the decrease in the toilet seat temperature while the toilet seat is in use is small.
There are almost no problems with heating sensation. When next used (,tm
-tn) also exhibits similar characteristics, and this is repeated every time it is used.

Next, if you continue to sit on the toilet seat for a long time from time to in FIG. continues to decrease, and finally the energization amount reaches zero and reaches seven times. Therefore, the toilet seat temperature is room temperature Tn at time tp.
When it becomes equal to , heating will stop. Thereafter, the toilet seat 2 will be heated by the human body, so there is no danger of low-temperature burns caused by sitting on it for a long time.

FIG. 6 shows a control circuit diagram of another embodiment of the toilet seat heating device of the present invention, and the same parts as those in FIG. 2 are shown with the same numbers, so a description thereof will be omitted. The difference from FIG. 2 is that a potential clipping circuit 16 is added. This circuit has an output voltage Vo of the amplifier 14 marked #.
When the potential VD becomes lower than the potential VD, the heater 6 is always kept at the potential Vl and a limited constant energization is applied to the heater 6 in order to prevent it from becoming zero.

Figure 6 shows a correlation diagram between the toilet seat temperature and the elapsed time when the toilet seat is used for a long time in the example shown in Figure 5 above.
The temperature is so low that a person can sit there without feeling cold.

In the above configuration, when sitting on the toilet seat 2 for a long time, the temperature of the toilet seat 2 gradually decreases as in the above embodiment, but a constant heater energization amount is maintained by the action of the potential clip circuit 15. Then, the temperature of the toilet seat 2 gradually approaches the temperature TD-KL shown in FIG. Since a certain amount of warmth is transmitted from the toilet seat 2 to the human body,
There is no need to worry about getting chills even in the coldest weather.

In addition, in the above embodiment, the application to a device in which the heater energization amount cannot be changed manually is shown, but if it is desired to change the heater energization amount, the charging resistor 1 to the capacitor 9 of the phase control circuit 7 may be used.
This can be easily achieved by replacing 6 with a variable resistor. Also, although the microswitch 6 is used as the human body detection means in the explanation, it may be detected using light or ultrasonic waves. Although an example of open-loop control has been shown as the energization control circuit, the present invention is also effective in conjunction with closed-loop control using a sensor that detects the temperature of the toilet seat 2. Although we have shown an example in which the temperature is lowered from the start, a configuration in which the temperature is lowered after a certain period of time has passed after sitting down is also effective, and the temperature may also be lowered in steps, and is not limited to the above embodiment. .

As is clear from the above description, according to the present invention, there is provided a toilet seat, a heater that heats the toilet seat, a human body detection means that detects the presence or absence of a human body using the toilet seat, a heater that energizes the heater, and a heater that heats the toilet seat. After receiving the human body detection signal from the human body detection means, the control circuit reduces the energizing amount of the heater, and has a function of lowering the toilet seat temperature after sitting on the toilet seat, so that it can be used for a short period of time in normal use. During defecation, the toilet seat temperature decreases little and the heating sensation is good, and -
When a person with a disability, the elderly, or a child sits on a toilet seat for a long time, the temperature of the toilet seat gradually drops, so there is no risk of low-temperature burns, and it is possible to provide a highly safe toilet seat heating device. can.

[Brief explanation of drawings]

FIG. 1 is a side view of a toilet seat heating device in one practical example of the present invention, FIG. 2 is a control circuit diagram of the same toilet seat heating device, and FIG. 3 is a correlation diagram of toilet seat temperature and elapsed time in normal use of the toilet seat. Fig. 4 is a correlation diagram between the toilet seat temperature and elapsed time when the toilet seat is used for a long time, Fig. 6 is a control circuit diagram of a toilet seat heating device in another practical example of the present invention, and Fig. 6 is an implementation of Fig. 5. In an example, it is a correlation diagram of the toilet seat temperature and the elapsed time when the toilet seat is used for a long time. 2...Toilet seat, 4...Human body, 5...
...Human body detection means (micro switch), 6...
・Heater, 7... Phase control circuit, 11...
... Power control element, 1'2 ... Output voltage variable circuit, 13 ... Capacitor, 14 ... Operational amplifier, 16 ... Potential clipping circuit. Name of agent Patent attorney Satoshi Nakao Male 4 - 1 other person 1 Figure 1 Figure 3 Figure 4 t□

Claims (1)

[Claims] ゛A toilet seat, a heater for heating the toilet seat, a human body detection means for detecting the presence or absence of a human body using the toilet seat, and after energizing the heater and receiving a human body detection signal from the human body detection means; , and a control circuit that reduces the amount of energization of the heater.