JPS6230644Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a Yagura Kotatsu that detects the presence or absence of a user as a change in stray capacitance using electrodes and controls the current supply to the load, and in particular can reliably detect the presence or absence of a user. It is about Yagura Kotatsu.

Conventional technology A conventional Yagura Kotatsu is equipped with an electrode that detects the presence or absence of a user as a change in stray capacitance at a predetermined location on the top plate of the Yagura Kotatsu body. It is configured to detect the power and control the power supply to the load.

Problems that the invention aims to solve With the Yagura Kotatsu constructed as described above, an electrode that detects the presence or absence of a user as a change in stray capacitance is simply installed at a predetermined location on the top plate of the Yagura Kotatsu body. Therefore, there was a drawback that it was not possible to reliably detect the presence or absence of a user inside the kotatsu body.

This invention eliminates the above drawbacks,
The purpose is to provide a kotatsu that can reliably detect the presence or absence of a user inside the kotatsu main body, and that does not require a separate space for providing electrodes.

Means for Solving the Problems The present invention is constructed by installing a pair of electrodes 1 on the support legs 3 of the Yagura Kotatsu body 2 so as to sandwich a space 5 in which the user of the Yagura Kotatsu body 2 sits to use the Yagura Kotatsu. This is what I did.

Function A pair of electrodes 1 provided on the support legs 3 of the Yagura Kotatsu body 2 reliably detects the presence or absence of a user as a change in stray capacitance, and reliably detects energization to the load depending on the presence or absence of the user. It is.

Embodiment An embodiment of the Yagura Kotatsu of the present invention will be described below with reference to the drawings.

As shown in Fig. 1, the Yagura Kotatsu of the present invention has a pair of electrodes 1 on the support legs 3 of the Yagura Kotatsu main body 2, which detect the presence or absence of a user as a change in stray capacitance. The structure is such that the current supply to the load (heater) 4 is controlled based on the detected change in stray capacitance.

In the above structure, the pair of electrodes 1 are provided on the support legs 3 of the kotatsu main body 2 so as to sandwich the space 5 in which the user (human body) of the kotatsu main body 2 sits to use the kotatsu.

Figure 2 is a block diagram of the control circuit for the Yagura Kotatsu shown in Figure 1. In Figure 2, 1 is a pair of electrodes, 4 is a load, 6 is an oscillator, 7 is a voltage dividing resistor, 8 is an amplifier, and 9 is a comparison 10 is a relay drive circuit for driving the relay 11, 11a is a relay coil of the relay 11, 11b is a relay contact of the relay 11, 12
13 is an AC power supply and 13 is a DC power supply.

The Yagura Kotatsu of the present invention configured as described above uses a pair of electrodes 1 to detect the presence or absence of a user in the space 5 where the Yagura Kotatsu body 2 is seated, as a change in stray capacitance, and detects the stray capacitance by using an oscillator 6 to convert the stray capacitance into a voltage dividing resistor. 7 and amplified by an amplifier 8, and the signal amplified by the amplifier 8 is sent to a comparator 9.
The output of the comparator 9 is applied to the relay drive circuit 10, and the output of the comparator 9 is applied to the relay drive circuit 10.
0 drives the relay coil 11a of the relay 11, and the relay coil 11a of the relay 11 drives the relay contact 11b to open and close, thereby controlling the supply of electricity from the AC power source 12 to the load 4 of the Yagura Kotatsu main body 2.

In the above case, since the pair of electrodes 1 are provided on the support legs 3 of the Yagura Kotatsu body 2 so as to sandwich the space 5 where the user of the Yagura Kotatsu body 2 sits to use the Yagura Kotatsu, the area of the pair of electrodes 1 is In contrast, the proportion occupied by users can be increased, and the amount of change in stray capacitance depending on the presence or absence of users can be increased.

In the above configuration, a case has been described in which a pair of electrodes 1 are provided on one support leg 3 of the kotatsu main body 2, but a similar pair of electrodes is also provided on the other support leg 3 of the kotatsu main body 2, If the electrodes 1 are provided on all of the support legs 3 of the kotatsu body 2, the amount of change in stray capacitance depending on the presence or absence of a user can be increased, and the presence or absence of a user can be detected more reliably.

Effects of the Invention Since the Yagura Kotatsu of the present invention has the above-described configuration, it is possible to reliably detect the presence or absence of a user inside the Yagura Kotatsu body, and there is no need to provide a separate space for providing electrodes.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the Yagura Kotatsu of the present invention, and FIG. 2 is a block diagram of the control circuit of FIG. 1. In the drawing, 1 is the electrode, 2 is the Yagura Kotatsu body, and 3
indicates the support leg, 4 indicates the load, and 5 indicates the space.

Claims (1)

[Scope of utility model registration request] In the Yagura Kotatsu, which detects the presence or absence of a user as a change in stray capacitance using electrodes and controls the current supply to the load, the electrodes are paired to form a space between the Yagura Kotatsu body and the space where the user sits to use the Yagura Kotatsu. This Yagura Kotatsu is characterized by the support legs of the Yagura Kotatsu body.