Patent ID: 7712755

Claim:
An extending and retracting device for a vehicle step comprising: a mounting bracket adapted to be fixed to a body of a vehicle; a step bracket formed with a substantially U-shaped groove therein defining a pair of side walls of said groove; an arc sliding member fixed to said step bracket, made in the form of an arc sliding block, and defining a pair of ends of said arc sliding member fixed in respective said pair of side walls of said groove; a driving arm defining a pair of ends thereof pivotally connected to respective said mounting bracket and said step bracket; and a supporting arm defining an upper end portion thereof pivotally connected to said mounting bracket and a lower end portion of said supporting arm located in said groove of said step bracket and defining at least one arc slot of said lower end portion, wherein said arc sliding member is adapted to pass through and fit into said arc slot so as to be slidable in said arc slot such that said lower end portion of said supporting arm is slidably connected to said step bracket.