This utility model relates to the field of automotive seat technology, specifically a seat back unlocking mechanism and seat, including: a press-down button
assembly; an unlocking
assembly, which is fixedly connected to the press-down button
assembly; a snap-fit assembly, including a fixed shaft and a fixed plate assembly, the fixed shaft being snap-fitted and fixed to the unlocking assembly; and a
gas spring assembly, including a connecting end and a rotating end arranged opposite to each other, the connecting end being fixedly connected to the fixed plate assembly, and the rotating end being rotatably connected to the seat back; the connecting end of the
gas spring assembly can rotate relative to the fixed shaft, and under the action of external force, the seat back can rotate relative to the armrest; the press-down button assembly of this utility model has high structural strength and is not easily deformed during use, ensuring the
structural stability of the press-down button assembly, reducing the damage rate of the press-down button assembly, and reducing maintenance costs; the press-down button assembly has a clear pressing
stroke, allowing users to quickly sense whether it is fully unlocked, thus improving the user experience.