ELECTRIC BLANKET FOR CAR CABIN

摘要

PROBLEM TO BE SOLVED: To provide a novel electric blanket for a car cabin which is capable of heating for a long time to be used mainly at a truck driver's seat and the like, receiving power for heating alternately from an onboard battery of the vehicle or an auxiliary battery optionally mounted by a driver. SOLUTION: The electric blanket to be used for the cabin, receiving power for heating from the onboard battery provided in the vehicle, and the auxiliary battery which is optionally mounted by the driver, comprises the electric blanket body having a heating electric circuit; the receiving circuit for receiving power from the onboard battery; a voltage decrease detecting circuit having an ON-type switch which becomes off when receiving voltage from the receiving circuit drops below a specified value, also having an OFF-type switch which becomes on when the receiving voltage rises above the specified value; a main power supply circuit which supplies power to the heating electric circuit of the electric blanket body when the ON-type switch becomes on through the above ON-type switch; an auxiliary power supply circuit which supplies power to the heating electric circuit of the electric blanket body from the auxiliary battery when the OFF-type switch becomes on through the above OFF-type switch; and a charging circuit line which supplies power to the auxiliary battery through the battery charging circuit from the above receiving power circuit when the above ON-type switch is on.