Proposed is a brake device for a vehicle seat, in which when a button part is pressed, an unlocking protrusion is inserted between braking members and pushes rollers of the braking members, which are positioned on wedge surfaces, to release surfaces, such that an unlocked state is implemented.

A lifting mechanism for a seat, a seat, and a vehicle. The lifting mechanism for the seat includes a fixing frame, a seat frame including a front end rotatably connected to the fixing frame; and a drive assembly installed to the fixing frame and configured to drive the seat frame to rotate around the front end.