Telescopic dual-purpose chair

The utility model discloses a telescopic dual-purpose chair. A backrest is hinged with the rear side of a seat plate bracket; the driving module comprises a turntable, a front driving rod, a front sliding block, a front guide rail, a rear driving rod, a rear sliding block and a rear guide rail; the circle center of the rotary disc is rotationally connected with the seat plate support, the first end of the front driving rod and the first end of the rear driving rod are coaxially arranged and rotationally connected with the same position of the rotary disc, and the position where the first end of the front driving rod is rotationally connected with the rotary disc deviates from the circle center of the rotary disc. The second end of the front driving rod is rotationally connected with a front sliding block, and the front sliding block is arranged in the front guide rail and connected with a pedal plate; the second end of the rear driving rod is rotationally connected with the rear sliding block, the rear slidin