Patent ID: 8757230

Claim:
An anti-skid device for a tire of a car, the anti-skid device comprising: at least two or more anti-skid bodies having a U-shaped cross-section, the anti-skid bodies being fitted on the tire and arranged in a circumferential direction of the tire such that the anti-skid bodies are connected with one another, the anti-skid bodies having an exterior part and an interior part, the exterior part being provided with a contact member for contacting with an outside surface of the tire, the interior part being provided with a contact member for contacting with an inside surface of the tire that faces axially inwardly towards the car, wherein the exterior part or the interior part of the anti-skid bodies is attached to the contact member with a shaft along an axial direction of the tire so that the shaft can move forward and backward in the axial direction of the tire, the contact member is disposed at an inner end of the shaft that protrudes into the anti-skid bodies, an elastic member is provided to apply a forward movement force to the shaft attached to the contact member, the contact member is pressed against the outside surface or the inside surface of the tire by an elastic force of the elastic member such that: (1) the contact member moves forward by the elastic force of the elastic member in response to a movement of the outside surface or the inside surface of the tire in contact with the contact member to an opposite side of the contact member, and (2) the contact member moves backward against the elastic force of the elastic member in response to a movement of the outside surface or the inside surface of the tire in contact with the contact member to a side of the contact member.