Multifunctional iron frame and seat

A multifunctional iron frame, comprising:

• a seat frame;
• a driving mechanism connected to the seat frame;
• a leg support mechanism comprising a leg support skeleton and a support plate sliding relative to the leg support skeleton, wherein the leg support skeleton is rotatably connected to the seat frame;
• a linkage mechanism connected between the driving mechanism and the leg support skeleton and pivotally connected to the seat frame, wherein the driving mechanism drives the leg support skeleton to rotate relative to the seat frame via the linkage mechanism;
• and
• a backrest mechanism, wherein the backrest mechanism comprises a backrest frame pivotally connected to the seat frame, the backrest mechanism is connected to the driving mechanism, the driving mechanism is configured to drive the backrest frame to rotate relative to the seat frame, and the linkage mechanism is connected between the backrest mechanism and the leg support skeleton, so as to enable the backrest frame and the leg support skeleton to rotate synchronously relative to the seat frame;
• wherein the multifunctional iron frame has a sitting state, a lying state and an intermediate state between the sitting state and the lying state, the intermediate state is a state when the support plate is closest to a ground when being overturned outward from below the seat frame, when the multifunctional iron frame is rotated from the sitting state to the intermediate state, the leg support skeleton is rotated relative to the seat frame while the support plate does not slide relative to the leg support skeleton;
• and, when the multifunctional iron frame is rotated from the intermediate state to the lying state, the leg support skeleton is rotated relative to the seat frame and the support plate is slid relative to the leg support skeleton.