JPS6329172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a Yagura Kotatsu in which a control circuit for controlling the energization of the heating element of the Yagura Kotatsu body can be operated by an operation section provided on a table board placed on the Yagura Kotatsu body through a futon. It is related to.

Conventionally, for this type of Yagura Kotatsu, the control circuit on the Yagura Kotatsu body side and the operation part on the table board side were exclusively connected using lead wires, so when using the Yagura Kotatsu body with a futon over it, the leads The wires were a nuisance, and the presence of the lead wires made it impossible to freely change the direction of the table plate, and the position of the operating section was limited.

The present invention has been made in view of these points, and embodiments of the present invention shown in the drawings will be described in detail below.

First of all, in Figs. 1 and 2, 1 is the main body of the Yagura Kotatsu which is equipped with a heating element 2 on the lower surface;
A control circuit 3 for controlling energization is provided at the corner, and a coil 4 of the circuit 3 is provided in a ring shape on the top surface. Reference numeral 5 denotes a table plate placed on the Yagura Kotatsu main body 1 through a futon 6 for the kotatsu, and is provided with an operation section 7 for operating the control circuit 3 and has a coil 8 arranged in a ring shape. It is located on a concentric circle. The control circuit 3 and the operating section 7 are connected wirelessly by magnetic force line coupling between the coils 4 and 8 of both. 9 is a power cord.

Next, Fig. 3 is a block diagram of the control system of the Yagura Kotatsu shown in Figs. 1 and 2, where 2 is a heating element, 3
1 is a control circuit, 4 is a coil, 7 is an operating unit having a variable resistor 7a, 8 is a coil, 9 is a power cord, 10
11 is a receiving section, and 11 is a control section having a relay 11a.

In the Yagura Kotatsu with the above configuration, when the operating section 7 is operated to control the temperature of the heating element 2, a signal with a frequency set by the variable resistor 7a is transmitted to the coil 8.
This signal is received by the receiving unit 10 by the coil 4, and the control unit 11 controls the relay 1 to maintain the temperature at the set temperature based on the signal from the receiving unit 10.
The contact point 1a is turned ON and OFF to control the supply of electricity to the heating element 2.

Fig. 4 is a block diagram showing another example of the control system of the Yagura Kotatsu shown in Figs. 8 is a coil, 9 is a power cord, 11 is a control unit having a relay 11a, 1
2 is a sweep oscillation circuit section, and 13 is a detection section.
In this case, a sweep wave is emitted from the coil 4, a resonance frequency is detected by the detection unit 13, and based on this, the control unit 11 controls the energization to the heating element 2 in order to maintain the temperature at the set temperature. It is something.

FIG. 5 shows another embodiment of the present invention, in which a short coil 14 is installed on the outer periphery of the coils 4 and 8 to suppress the spread of unnecessary magnetic lines of force and to reduce the range of influence as shown in FIG. This prevents interference to the equipment and enables more sufficient coupling of magnetic lines of force between the coils 4 and 8.

As described above, the Yagura Kotatsu of the present invention eliminates the need for conventional lead wires, eliminates the inconvenience of lead wires getting in the way, and allows the user to freely change the direction of the table board and operate the operating section. It can be moved to an easy position, and operability can be significantly improved.

Furthermore, by installing short coils around the outer periphery of the control circuit and operation unit coils, the spread of unnecessary magnetic lines of force is suppressed, and by reducing the range of influence, it prevents damage to other equipment and prevents magnetic line of force coupling between coils. can be made more sufficient.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the kotatsu of the present invention, Fig. 2 is a side view of the same schematic configuration, Figs. 3 and 4 are block diagrams of the control system of the same, and Fig. 5 is a kotatsu of the invention. Plan view showing the embodiment, No. 6
The figure is an explanatory diagram of magnetic field line radiation. 1: Yagura kotatsu body, 2: Heating element, 3: Control circuit, 4: Coil, 5: Table board, 6: Futon, 7: Operation part, 8: Coil, 14: Short coil.

Claims (1)

[Claims] 1. A Yagura Kotatsu main body provided with a heating element and a control circuit for controlling energization of the heating element, and a table board placed on the main body and provided with an operating section for operating the control circuit, the control circuit being and the operating section are wirelessly connected by magnetic field line coupling between both coils, and furthermore, a short coil is installed on either the Yagura Kotatsu body or the table board, and is located on the outer periphery of the coil of the control circuit and the coil of the operating section. Yagura Kotatsu.