JPS6343743Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cloth electric heating device, such as an electric hot spring, an electric cushion, etc., which is equipped with an electric heating part and a temperature control device.

Conventional configurations and their problems In general, for example, in an electric seat cushion as shown in Fig. 1, the main body 1 is thin, so it is not possible to attach a large manual mechanical temperature controller like that found in a yagura kotatsu. Can not. Therefore, as shown in FIG. 2, a thermostat 3 for temperature control is provided on the main body 1 side in series with the main heater 2, and the thermostat is adjusted by changes in heat generated by the auxiliary heater 4 provided close to the thermostat 3. By changing the thermal bias of the thermostat 3, the operation of the thermostat 3 relative to the heat generation temperature of the main heater 2 is varied.

The heat generation change of the auxiliary heater 4 is
By changing the variable resistor 5 provided outside, the heat generated by the auxiliary heater 4 connected in parallel with the variable resistor 5 is adjusted.

By the way, in such a configuration, when the auxiliary heater 4 or the line of the auxiliary heater 4 is disconnected, when the resistance of the variable resistor 5 is large and the working voltage is large,
There is a problem that the variable resistor generates abnormal heat and the variable resistor 5 burns out.

Purpose of the Invention The present invention takes into consideration the above-mentioned conventional problems, and aims to prevent the variable resistor from burning out even if the auxiliary heater or its current-carrying circuit is disconnected.

Structure of the Invention In order to achieve the above object, the present invention provides a thermostat in the energizing circuit of the main heater, an auxiliary heater for auxiliary heating of the thermostat, and a variable resistor connected in parallel to the auxiliary heater. controlling the heat generation of the auxiliary heater by operating the variable resistor;
A fabric electric heating device for adjusting the operation according to the heat generation temperature of the main heater of a thermostat, wherein a temperature fuse is provided in series with the variable resistor, and this temperature fuse is provided close to the resistor of the variable resistor. Based on the above configuration,
Even if the auxiliary heater circuit is cut off for some reason, the temperature fuse is blown by the heat generated by the variable resistor, thereby preventing the variable resistor from burning out.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings.

In FIG. 3, reference numerals 1 to 5 are the same structural members as in FIG. 1, and wires are connected in the same manner as in FIG. 1. A temperature fuse 6 is inserted into the current supply circuit of the variable resistor 5. This temperature fuse 6 is arranged close to the variable resistor 5, and is designed to blow out when the variable resistor 5 generates abnormal heat. Specifically, as shown in FIGS. 4 to 6, a variable resistor 5 is provided in the regulator casing 7, and a portion on the surface of the regulator casing 7 and corresponding to the resistance portion 5a of the variable resistor 5 is provided. A recess 8 is formed in the
A temperature fuse 6 is inserted into this recess 8 to receive heat conduction. FIG. 7 shows another example in which a recess 8' is formed inside the regulator casing 7 and on one side of the resistor portion 5a;
A temperature fuse 6 is provided here.

Effects of the invention According to the invention, even if the auxiliary heater connected in parallel to the variable resistor or the energizing circuit of this auxiliary heater is cut off, the temperature fuse is blown by the heat generated by the variable resistor, and the This prevents the resistance from melting and has a great practical effect.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an electric cushion, Fig. 2 is an electric circuit diagram of a conventional cloth heating device, Fig. 3 is an electric circuit diagram of a cloth heating device according to an embodiment of the present invention, and Fig. 4 is its temperature. FIG. 5 is a plan view of the casing of the temperature regulator, FIG. 6 is an enlarged sectional view taken along line b-b' of FIG. 5, and FIG. 7 is another example of the casing according to the present invention. FIG. 1... Main body, 2... Main heater, 3... Thermostat, 4... Auxiliary heater, 5... Variable resistor,
6...Temperature fuse.

Claims (1)

[Scope of utility model registration request] A main heater, a thermostat, a variable resistor for temperature adjustment, and a temperature fuse are connected in series, a series circuit of the variable resistor and temperature fuse, and an auxiliary heater for auxiliary heating of the thermostat are connected in parallel; A cloth electric heating device in which a main heater, a thermostat, and an auxiliary heater are arranged in the main body, and a temperature fuse is provided close to the resistor part of a variable resistor.