Rear turnover type telescopic stand seat

The utility model discloses a rear turnover type telescopic stand seat, and relates to the technical field of turnover type telescopic stand seats. The device comprises an L-shaped bottom plate, a middle-layer supporting seat arranged above the L-shaped bottom plate and a top-layer supporting seat located above the middle-layer supporting seat, overturning assemblies are arranged on the top of the L-shaped bottom plate and the top of the middle-layer supporting seat, and a contraction assembly is arranged below the top-layer supporting seat; the overturning assembly comprises fixing seats, a cushion, a backrest plate, inclined block backrest cotton and springs, the tops of the L-shaped bottom plate and the middle-layer supporting seat are fixedly connected with the fixing seats, the cushion is fixedly connected to the upper portions of the fixing seats, and the backrest plate is hinged to the side wall of the top-layer supporting seat. According to the telescopic stand seat, through the designed overturning a