JPH0144858B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a flushing device for a flush toilet.

Structure of conventional example and its problems A conventional toilet flushing device will be explained with reference to FIGS. 1 to 6.

FIG. 1 shows a block diagram of the most common toilet flushing device. 1 is a toilet bowl, 2 is a toilet seat, 3 is a cistern that stores water for flushing the inside of the toilet bowl 1, 4 is a valve provided at the bottom of the cistern, 5 is a chain connected at one end to the valve 4, and 6 is the An arm 7 connected to the other end of the chain 5 is a penetrating shaft provided through the wall of the cistern 3, and one end is connected to the arm 6. 8 is installed on the outer wall of the cistern 3, and by rotating the penetrating shaft 7 from outside the cistern, the arm 6 is also rotated and the chain 5 is rotated.
This is a flushing lever that releases water into the toilet bowl 1 by pulling up the valve 4 and releasing water into the toilet bowl 1.

FIG. 2 is an exploded sectional view of the penetrating shaft and flushing lever in the conventional example. 9 is a rectangular through hole provided in the wall of the cistern 3; 10 is a fixing metal fitting; 11 is a circular collar that abuts against the wall of the cistern 3; 12 is fitted in the through hole 9 to prevent rotation of the fixing metal fitting; A rectangular fitting portion 13 is a screw portion, and a notch portion 14 is fitted with a rotation angle regulating pin, which will be described later. 15 is a rubber gasket, 1
6 is a nut, 17 is a rotation angle regulating pin provided on the through shaft 7, 18 is a serration convex portion for fitting, and 19 is a screw portion. 20 is a serration recess for fitting provided in the flushing lever 8; 21;
2 is a round hole for passing a screw through, and 22 is a set screw. The assembly is performed using the through hole 9 provided in the cistern 3.
Fit the fixing fitting 10 from the outer wall side into the nut 1 through the rubber packing 15 from the inner wall side.
Fix it to the wall in step 6. Next, the penetrating shaft 7 is passed through the fixing fitting 10 from the inner wall side, the serration concave portion 20 of the flushing lever 8 is fitted into the serration convex portion 18 protruding from the outer wall, and the penetrating shaft 7 is fitted with the set screw 22. Fix it so that it does not fall out.

In the above configuration, when flushing is performed, by rotating the flushing lever 8, the penetrating shaft 7 and the arm 6 are also rotated, the chain 5 is pulled up, the valve 4 is opened, and water is discharged into the toilet bowl. However, it is necessary to operate the flush lever after using the toilet, which causes a feeling of nuisance for the user, and it also feels unhygienic as multiple people touch the flush lever. It has many drawbacks, such as emitting a bad odor if the user forgets to operate it, and it is difficult for short children and weak elderly people to operate it.

Special toilet bowls have also been developed to overcome the above drawbacks. A conventional example is shown in FIG. This is a cistern-integrated toilet bowl with the function of cleaning the private parts after using the toilet, 23 is an integrated body, 2
4 is a solenoid that pulls up and opens the valve 4;
5 is a cleaning device built into the main body 23; 26;
a foot switch 27 that operates the cleaning device 25 and the solenoid 24 by stepping on it with a foot;
is an electric wire connecting the foot switch 26 to the cleaning device 25.

In the above configuration, after the user finishes using the toilet, the user depresses the foot switch 26 to activate the cleaning device 25 to clean the user's private parts. At the same time, the solenoid 24 is also activated to flush the toilet bowl at the same time. However, it still gives the user a feeling of cumbersomeness as they have to press the foot switch every time after using the toilet.
Furthermore, the problem that it was difficult to use for children with short legs and weak elderly people who could not reach the floor remained unresolved.

As a solution to those shortcomings, Figure 4~
As shown in FIG. 6, a configuration has also been considered in which the toilet seat is automatically flushed by detecting that the toilet seat has been stood up.

FIG. 4 is a configuration diagram thereof, and the same members as in the conventional example shown in FIG. 1 are given the same numbers. Reference numeral 28 denotes a rear case that rotatably holds the toilet seat 2, and the hinge portion is provided with play by an elongated hole so that it can move slightly up and down. 29 is a biasing means provided in the rear case 28, and 30 is a seat detection means also provided in the rear case 28. In this example, a micro switch is used to push up the toilet seat 2 when the toilet seat 2 is not seated. It is turned off when the user sits on the toilet seat 2, and turned on when the user sits on the toilet seat 2. Further, 31 is an electromagnetic drive means for driving the through shaft 7, and in this example, a rotary solenoid is used. 3
Reference numeral 2 denotes an electric wire connecting the rotary solenoid 31 to the urging means 29.

FIG. 5 is an exploded sectional view of the electromagnetic driving means in the conventional example, and the parts in the cistern inner wall part in FIG. 2 are common. 33 is the second
This is a fixture used in place of the fixture 10 shown in the figure, and has threaded parts 34 and 35 on the sides. 3
Reference numeral 6 designates a coupling fitting that connects the through shaft 7 shown in FIG. It is provided. 40 is the rotary solenoid 31
It is a holding metal fitting for holding, and is fixed to the fixing metal fitting 33 by screws 41 and 42, and
The rotary solenoid 3 is connected with nuts 43 and 44.
Hold 1. 45 is a rotating shaft of the rotary solenoid 31, and the tip thereof is D-cut so as to fit into the D-shaped opening 38 of the coupling fitting 36. As with the conventional example shown in FIG. 2, assembly is carried out by fitting the fixing fitting 33 into the through hole 9 provided in the cistern 3 from the outer wall side and fixing it to the wall with the nut 16 via the rubber packing 15 from the inner wall side. do. Next, insert the through shaft 7 into the fixing bracket 3 from the inner wall side.
3, and the serration concave portion of the coupling fitting 36 is fitted into the serration convex portion 18 protruding from the outer wall, and fixed with the set screw 39 so as not to come off. Next, the holding fitting 40 and the rotary solenoid 31 are connected using the nuts 43 and 44, and then the rotating shaft of the rotary solenoid 31 is fitted into the coupling fitting, and the screws 41 and 42 are connected to each other.
It is fixed to the fixing metal fitting 33.

FIG. 6 is a circuit diagram of the biasing means 29 in the conventional example. 46 is a power supply, 47 is a pull-up resistor, 48 is a one-shot multi that generates a short pulse (about 0.5 seconds) from output φ when input I changes from Low to High, 49 is a base resistor,
50 is a transistor, and 51 is a diode for absorbing back electromotive force of the rotary solenoid 31.

In the above configuration, when a user sits on the toilet seat 2, the micro switch 30 is turned on and the input I potential of the one shot multi 48 is set to Low. At this time, the output φ of the one-shot multiplier 48 remains low, and the transistor 50 remains off. When the user finishes using the toilet and stands up from the toilet seat 2, the one shot multi 4
The input I potential of 8 becomes Hi, and at that moment a short pulse is generated from the output φ of the one-shot multi 48, which momentarily energizes the rotary solenoid 31 to rotationally drive the through shaft 7 and close the valve. 4 is opened to automatically perform water washing.

The above configuration makes good use of the ending action of standing up from the toilet seat after using it, and automatically flushes the toilet bowl, so it is clean and clean without requiring the user's hands. It eliminates the possibility of forgetting to flush and not flushing, so no bad odors are emitted, and since it uses the movement of standing up from the toilet seat, it can be used by both children and the elderly, and it has a configuration that eliminates most of the drawbacks. However, new problems were raised during actual use. This is because when wiping the toilet seat, just by touching the seat, the micro switch 30 turns on and off and flushes, and because all users wipe with paper after using the toilet, they have to sit half-way up from the toilet seat. At that time, the microswitch 30, which is the seat detection means, is often turned off and flushing is performed, which not only wastes water, but also causes the water inside the cistern 3 to be turned off when flushing is really desired. I can't wash my clothes because the water hasn't filled up yet,
Furthermore, malfunctions make it difficult to clean the toilet bowl, give the user a sense of anxiety, and create a feeling of pressure that makes it difficult to move on the toilet seat.

Purpose of the invention The present invention solves such conventional problems,
Flushing does not start automatically when the user touches the toilet seat or lifts their hips off the toilet seat, but only when the user sits firmly on the toilet seat and when the user stands up from the toilet seat after using the toilet. The purpose of this invention is to provide a toilet flushing device that flushes the toilet with water.

Structure of the Invention In order to achieve this object, the present invention includes a seat detection means for detecting that a person is sitting on a toilet seat, a delay means for delaying both on and off outputs of the seat detection means, and a delay means for delaying both on and off outputs of the seat detection means. A biasing means is provided for biasing the cistern water discharge means by the output of the means.

With this configuration, even if the seat detection means is activated for a short time by, for example, touching the toilet seat when wiping it or wiping it with paper while sitting on the toilet seat, flushing will not occur automatically. It has the effect of not having

DESCRIPTION OF THE EMBODIMENT FIG. 7 is a circuit diagram of the biasing means 29 in an embodiment of the toilet flushing device of the present invention, and the discharge means, seat detection means, and biasing means are shown in FIGS. 4 to 6. This is the same as the conventional example. 52 is a capacitor constituting a timer; 53 is the capacitor 5;
Charging resistor 2, 54 and 55 reference potential resistors, 5
6 is a discharge resistance of the capacitor 52, and 57 is a comparator.

In the above configuration, when a user sits on the toilet seat 2, the microswitch 30 is turned on, rapidly discharging the charge in the capacitor 52, and increasing the output of the comparator 57, that is, the input I potential of the one-shot multi 48. Set it to Low. Therefore, the output φ of the one-shot multiplier 48 also remains low, and the transistor 50 also remains off.
Even if you lift your hips while sitting and the micro switch 30 turns OFF for a short time,
Since the potential of the capacitor 52 does not rise rapidly, the transistor 50 will not turn on due to malfunction and will not be washed away. When the user finishes using the toilet and stands up from the toilet seat 2 for a certain period of time, for example 3 seconds, the capacitor 5
2 rises, and the output of the comparator 57 is inverted to Hi. At that moment, a short pulse is generated from the output φ of the one-shot multi 48,
The rotary solenoid 31 is momentarily energized to rotate the through shaft 7, and the valve 4 is opened to automatically perform water washing.

In addition, in order to prevent water washing from being performed due to the micro switch 30 being turned on for a short time, the value of the discharge resistor 56 is increased to provide a delay even when the micro switch 30 is turned on. You can try to find a solution. This reliably prevents the microswitch from turning on when wiping the toilet seat or the like, causing the toilet seat to be flushed without permission. In addition, although a microswitch was used in the embodiment as a seat detection means, similar effects can be achieved by using other detection means such as a pressure sensor that emits a signal when body weight is applied, or a detection method that uses resistance on the local skin surface. can be obtained, and is not limited to the above embodiments.

Effects of the Invention As described above, the toilet flushing device of the present invention has a means for discharging the water in the cistern of the flush toilet into the toilet bowl, and a seat detection means for detecting that a person is sitting on the toilet seat installed on the toilet bowl. and a delay means for delaying both ON and OFF outputs of the seat detection means, and an energizing means for energizing the ejection means by the output of the delay means, wherein the user Since it detects when someone has stood up for more than a certain amount of time and automatically flushes the water, anyone, regardless of whether they are children or the elderly, can easily and reliably flush the toilet. Even if the seat detection means operates for a short period of time, such as when the seat is slumped over due to the paper wiping action that always accompanies use, or when you shake your body on the toilet seat, the toilet will not automatically flush, resulting in fewer malfunctions and stable operation. Therefore, it has the advantage that there is little wastage of water and the user can use it with peace of mind.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the most common conventional toilet flushing device, Fig. 2 is an exploded block diagram of the penetrating shaft and flush lever portion in the conventional example, and Fig. 3 is a block diagram of another conventional toilet flushing device. , FIG. 4 is a block diagram of another conventional toilet flushing device, FIG. 5 is an exploded sectional view of the electromagnetic driving means, FIG. 6 is a circuit diagram of the urging means, and FIG. 7 is a diagram of the present invention. FIG. 3 is a circuit diagram of a biasing means in an embodiment of the toilet flushing device. 1... Toilet bowl, 2... Toilet seat, 3... Cistern,
4... Valve, 29... Urging means, 30... Seat detection means (micro switch), 31... Electromagnetic driving means (rotary solenoid), 48... One shot multi, 50... Transistor, 52... Capacitor , 53...Charging resistance, 56...Discharging resistance, 5
7... Comparator.

Claims (1)

[Claims] 1. A means for discharging water in the cistern of a flush toilet into the toilet bowl, a seat detecting means for detecting when a person sits on the toilet seat installed on the toilet bowl, and a means for turning on and off the seat detecting means. A toilet flushing device comprising: a delay means for delaying output; and a biasing means for biasing the discharge means by the output of the delay means.