Patent ID: 8261792

Claim:
An airbag device for a vehicle tire, comprising: a resilient outer ring installed between the tire and a wheel hub, and an inner ring serving to support said resilient outer ring, wherein during normal operation of the tire, said resilient outer ring is in a contracted state, and abuts the wheel hub; a free space is formed between said resilient outer ring and an inner surface of the tire; and said resilient outer ring does not contact said inner surface of the tire; after loss of normal tire pressure, said resilient outer ring is an expanded state, abuts said inner surface of the tire, and together with said inner ring supports the weight of a vehicle; said inner ring comprises an inner supporting member and a lateral supporting member; the bottom end of said lateral supporting member is connected with a push rod; a connection point between said lateral supporting member and said push rod serves to lock the bottom end of said inner supporting member whereby fixing said inner supporting member; an airbag is installed between said inner supporting member and said resilient outer ring; during normal operation of the tire, said resilient outer ring is compressed and locked at the lowest point of said inner supporting member; after loss of normal tire pressure, said resilient outer ring is released from said lowest point of said inner supporting member and moves to the stop point and then is locked so that it cannot return back; and the top end of said inner supporting member is further connected with a tightening ring.