Free hinge drive system for link of vehicle seat

A seat for a vehicle, the seat comprising:

• a seat cushion on which a passenger is seated;
• a seatback connected to the seat cushion and configured to support the passenger's back;
• a headrest provided at an upper end portion of the seatback and configured to support the passenger's neck and head;
• and
• a free hinge drive system for a link, the free hinge drive system comprising:
• a motor mounted at one side of the seat;
• a brake device mounted at another side of the seat and configured to stop rotating by a braking force of the brake device under a brake condition and to rotate in a same direction simultaneously by receiving a rotational force of the motor by an interconnection member to eliminate the braking force under a brake release condition, wherein the free hinge drive system is provided in the seat cushion;
• a first sector gear having a central side rotatably connected to one side of a first fixing member, and a rear side gear-coupled to a first pinion gear of the motor;
• and
• a first front height link rotatably connected to a front side of the first sector gear,
• wherein one side portion of the motor is mounted on a motor mounting member installed at one side of the vehicle seat so that the first pinion gear penetrates through one end portion of the interconnection member, and
• wherein a connection socket penetrates through a center of the motor mounting member, one end portion of the connection socket is fitted with and connected to the first pinion gear while corresponding to a gear shape.