JPH0688371A - Seating detecting device for hot water washing seat - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a trouble even when taking up and down of a seat lid is violently effected and to perform reliable detection of seating of a user without reducing the strength of the seat. CONSTITUTION:A strain gauge 4 is attached to the back of a seat 1. When a user seats the seat 1, the seat 1 is bent under the weight thereof and the strain gauge 4 is strained, and owing to the above, the resistance value thereof is changed. In a hot water washer body 5, through detection of the change in resistance of the strain gauge 4, it is detected that a user seats a seat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seating detection device for a warm water washing toilet seat, which detects when a user is seated on the toilet seat.

[0002]

2. Description of the Related Art In a conventional seat occupancy detection device for a warm water washing toilet seat, it is detected that the user is seated on the toilet seat, for example, by the following method.

.. A method of detecting seating by providing a contact that turns on and off by the load of the user inside the rubber leg provided on the back of the toilet seat so as to contact the upper surface of the toilet when the toilet seat is tilted.

.. A method in which a temperature sensor is installed on the back of the toilet seat to detect the presence or absence of the user's seat by detecting changes in temperature.

[0005]

However, the above method has a problem that when the toilet seat is roughly raised and lowered, an excessive load is applied to the legs, causing malfunction or failure.

Further, in the above method, in order to improve the temperature detection accuracy without increasing the cost and to shorten the reaction time, it is necessary to reduce the wall thickness of the toilet seat at the place where the temperature sensor is installed. It had the drawback of weakening the strength of. It is also possible to reduce the thickness of a part of the wall, but in this case, a sink is likely to occur in the molded product, and there is a problem that uneven light determination occurs in the mirror finish of the toilet seat surface.

Therefore, the present invention has been made by paying attention to such a problem. Even if the raising and lowering of the toilet seat is violently performed, no trouble occurs, and the strength of the toilet seat is not lowered and the user can be surely prevented. It is an object of the present invention to provide a seating detection device for a warm water washing toilet seat that can detect the seating of the seat.

[0008]

In order to achieve the above object, according to the present invention, a seating detection device for a warm water washing toilet seat, which detects when a user sits on the hot water washing toilet seat, is attached to the back surface of the hot water washing toilet seat. And a seating detecting means for detecting that the user is seated on the toilet seat by detecting the strain of the warm water washing toilet seat by the resistance change of the strain gauge.

[0009]

According to the present invention, when the user sits on the toilet bowl with warm water washing, the strain gauge provided on the back surface of the toilet seat is distorted and its resistance changes, and the seating detection means detects the seating of the user by the resistance change. To do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat occupancy detecting device for a warm water washing toilet seat according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a warm water washing toilet seat (hereinafter referred to as a toilet seat) which is laid on a toilet bowl as seen from above, and FIG. 2 is a side view of the toilet seat as seen from the side.

On the toilet bowl 3, as shown in FIGS. 1 and 2,
The main body 5 of the hot water washer and the hinge part 1a on the main body 5 of the hot water washer
A toilet seat 1 is attached to the toilet seat 1 so as to be openable and closable, and a rubber leg portion 2 is provided on the back surface of the toilet seat 1 to cushion contact with the upper surface of the toilet bowl 3. Although not shown here, a seating detection circuit 6 as seating detection means, which will be described later, is provided in the main body 5 of the hot water washer.

A strain gauge 4 for detecting the strain when the user is seated is located on the back surface of the toilet seat 1 where the strain rate when the user is seated changes by about 10 ^-2 to 10 ^-6. Is attached, and the strain gauge 4 is connected to the seating detection circuit 6.

Next, the configuration of the seating detection circuit 6 is shown in FIG.

The seating detection circuit 6 includes comparators 61 and D.
Comprising an A / A converter 62 and a CPU 63c, the comparator 61 uses a fixed resistor R and a strain gauge 4 to generate a constant voltage V.
The voltage value obtained by dividing cc is compared with the reference voltage value input from the CPU 63 via the D / A converter 62 at a constant cycle, and the input voltage value on the strain gauge 4 side and the input on the D / A converter 62 side are compared. When the voltage values become equal, the comparator 61 sends a signal to the CPU 63, and the CPU 63 detects the seating of the user.

Next, the operation of this apparatus will be described. First, when the user is not seated on the toilet seat 1, the strain gauge 4
Of the constant voltage Vcc by the strain gauge 4 or the like input to the comparator 61 and the D /
The reference voltage value from the A comparator 61 does not match.
Therefore, the comparator 61 does not output, and the CPU 6
3 detects that the user is not sitting on the toilet seat 1.

On the other hand, when a user sits on the toilet seat 1, the weight of the user distorts the casing of the toilet seat 1, and the strain changes the resistance value of the strain gauge 4 attached to the back surface of the toilet seat 1. Then, due to the resistance change of the strain gauge 4, the strain gauge 4 and the fixed resistance R input to the comparator 61 are input.
The divided voltage value of the constant voltage Vcc due to changes in the output voltage, and the comparator 61 outputs the voltage with the divided voltage value and the reference voltage value in agreement, and the CPU 63 detects that the user is seated on the toilet seat 1. To do.

Therefore, in this embodiment, the seating of the user can be detected by the strain gauge 4 on the back surface of the toilet seat 1.
Even when the lifting and lowering of the seat is rough, the probability of failure is lower than in the case where the legs 2 are provided with on-off contacts and the like, and the seating can be detected reliably without lowering the strength of the toilet seat 1.

Although the strain gauge 4 is provided on the back surface of the toilet seat 1 in this embodiment, the location where the strain gauge 4 is attached is not limited to the back surface of the toilet seat 1, but the toilet seat 1 and the hot water cleaner body 5 can be attached. When the user sits down, such as the hinge portion 1a for connecting the and the like, strain is generated by the weight thereof, and the strain rate may change anywhere from 10 ⁻² to 10 ⁻⁶ .

[0020]

As described above, in the present invention, the strain gauge is attached to the back surface of the toilet seat, and the seating of the user is detected by the resistance change of the strain gauge, so that the raising and lowering of the toilet seat is made rough. Even in this case, the probability of failure is reduced, and seating can be detected reliably without reducing the strength of the toilet seat.

[Brief description of drawings]

FIG. 1 is a plan view of a warm water washing toilet seat that has been laid down on a toilet bowl.

FIG. 2 is a side view of a warm water flush toilet seat that is laid down on the toilet bowl.

FIG. 3 is a block diagram showing a configuration of a seating detection circuit.

[Explanation of symbols]

 1 Hot water washing toilet seat 2 Legs 3 Toilet bowl 4 Strain gauge 5 Hot water washing device body 6 Seat detection circuit (seating detection means)

Claims (1)

[Claims] 1. A seating detection device for a warm water washing toilet seat, which detects when a user sits on the hot water washing toilet seat, wherein the strain gauge attached to the back surface of the warm water washing toilet seat and the resistance change of the strain gauge A seating detection device for a hot water washing toilet seat, comprising: a seating detection unit that detects distortion of the hot water washing toilet seat to detect that the user has sat on the toilet seat.