Inbuilt seat leg support and seat

1. An inbuilt seat leg support, installed in a seat, the seat comprising a base frame and a cushion frame located above the base frame, wherein a receiving space is formed between the base frame and the cushion frame, the seat leg support comprises a leg support frame configured to be received in the receiving space, the leg support frame is movable and adjustable relative to the cushion frame, and movement and adjustment of the leg support frame cause the leg support frame to extend out of the receiving space to be in an extended state or to retract into the receiving space to be in a received state;

wherein sliding grooves are formed on a top face of the leg support frame in a direction of extension of the leg support, hooks are formed on the cushion frame corresponding to the sliding grooves, and disposing the hooks in the sliding grooves enables the movement and adjustment of the leg support frame relative to the cushion frame;

each of the hooks comprises a vertical portion and a transverse portion fixed to a bottom of the vertical portion, each of the sliding grooves comprises a vertical groove and a transverse groove in communication with each other, the transverse portion is disposed in the transverse groove, the vertical portion is disposed in the vertical groove, an upper surface of the transverse portion is covered with a cushion block, and an upper surface of the cushion block is attached to an upper surface of the transverse groove.

2. The inbuilt seat leg support according to claim 1 , wherein the sliding grooves are L-shaped grooves, a number of sliding grooves is two, the hooks are L-shaped members, a number of hooks is two, and the two hooks are disposed opposite to each other.

3. The inbuilt seat leg support according to claim 1 , wherein gap filling strips are further disposed between the cushion frame and the leg support frame.

4. The inbuilt seat leg support according to claim 1 , wherein an arcuate rack is disposed on a bottom face of the leg support frame, the seat leg support further comprises a driving mechanism that is disposed corresponding to the rack and configured to drive the leg support frame to move, a gear meshed with the rack is disposed on the driving mechanism, driving the gear to rotate drives the rack to move, and the rack in turn drives the leg support frame to move.

5. The inbuilt seat leg support according to claim 4 , wherein the gear is connected to a motor, and the motor drives the gear to rotate.

6. The inbuilt seat leg support according to claim 1 , wherein a communicating space that affords communication between a front side and a rear side of the leg support frame is formed in the leg support frame; and

the inbuilt seat leg support further comprises a cover and a cable, one end of the cover is fixed at a position on the cushion frame that is located above the leg support frame, an other end of the cover extends into the communicating space from a front side of the leg support frame, one end of the cable is fixed at a position on the base frame that is located below the leg support frame, and an other end of the cable extends into the communicating space from a rear side of the leg support frame and is connected to an end portion corresponding to the cover.

7. The inbuilt seat leg support according to claim 6 , wherein a rotatable roller is disposed on the front side of the leg support frame, a fixed pulley is disposed on the rear side of the leg support frame, the cover is wound around the roller, and the cable is wound around the fixed pulley.