Seat Bracket and Seat

A seat bracket, comprising:

• a chassis, comprising a base and a side plate swingably arranged on the base;
• a seat frame, swingably arranged on the side plate and having a sitting posture, a TV posture and a zero gravity posture, the seat frame comprising a swingable seat frame plate;
• a linkage mechanism, comprising a first linkage plate and a second linkage plate disposed at intervals, two ends of the first linkage plate being respectively hinged to the side plate and the seat frame plate, two ends of the second linkage plate being respectively hinged to the side plate and the seat frame plate, and the side plate, the first linkage plate, the second linkage plate and the seat frame plate at least enclosing a closed four-linkage structure;
• and
• a first driving member, arranged on the base, when or after the first driving member operates, the seat frame plate swinging to drive the first linkage plate and the second linkage plate to swing to deform the four-linkage structure so that the seat frame is switched among the sitting posture, the TV posture and the zero gravity posture, wherein
• in a process of switching the seat frame from the sitting posture or the TV posture to the zero gravity posture, the seat frame plate takes a zero gravity line as a reference line, a front end of the seat frame plate is adjusted to move towards the reference line, and a rear end of the seat frame plate is adjusted to move towards the reference line.