Protective air bag collar for old people falling down

The invention relates to the field of protective air bags, and particularly relates to a protective air bag collar for old people falling down. The protective air bag collar comprises a protective air bag and a cylindrical mounting box, wherein an inflation inlet is formed in one end of the protective air bag; the cylindrical mounting box consists of a connecting chamber, an induction chamber and a gas generator accommodating chamber; the gas generator accommodating chamber is fixedly connected between the connecting chamber and the inflation inlet; a gas generator capable of filling the protective air bag is arranged in the gas generator accommodating chamber; and the induction chamber is used for judging whether the old people fall down or not and controlling the working state of the gas generator. The protective air bag collar has the advantages of light weight, easiness in wearing, low manufacturing cost and the like, and can effectively protect the heads of the old people in the falling process; and more