Displacement mechanism for getting on and off vehicle having the advantages of simple structure, low manufacturing cost, cheaper price, better flexibility to have economy and practical benefits

According to the invention, a displacement mechanism for getting on and off a vehicle includes: a foot frame, a seat cushion, a sliding bar, two legs, a seat back, a first bearing plate, a second bearing plate, and a bridge. The foot frame is provided with a chair seat at its upper end while a wheel seat is disposed at the lower end. A lifting device is provided between the chair seat and the wheel seat. A sliding hole is provided on one side of the seat cushion. The front side of the seat cushion is equipped with a leg lifter capable of being pivoted and adjusted. The sliding bar can be slidably arranged in the sliding hole of the seat cushion. The two legs are detachably assembled at lower ends of both sides of the leg lifter. The seat back is assembled on the rear side of the seat cushion. The first bearing plate is assembled on the seat of a wheelchair. The second bearing plate is assembled on an automobile seat. The bridge is installed between the chair seat of the foot frame and the second bearing plate