Seat for Transport Vehicles

A seat (1) for transport vehicles, with a frame (2) articulated and linked by means of a guide system to a fixed structure or chassis (4) that gives said frame the ability to move and change shape between a neutral position N and a comfort position C, the frame comprising a backrest portion (23) that increases the inclination thereof with respect to the vertical as said frame moves from the neutral position N to the comfort position C, the seat being characterised in that the frame (2) comprises a headrest portion (21),

• the headrest portion (21) being mechanically linked by means of a connector (22) to a connection area of the backrest portion (23) that changes the height position thereof as the frame (2) moves from the neutral position N to the comfort position C thereof, the connector (22) being suitable for this change in height position to be transmitted, by means of mechanical drag, to the headrest portion (21),
• the headrest portion (21) being also mechanically linked by means of an upper guide unit (31) of the guide system to the chassis (4), said upper guide unit (31) being configured so that the inclination of the headrest portion (21) also increases the inclination thereof with respect to the vertical as the connector (22) transmits to the headrest portion (21) the motion of the frame (2) from the neutral position N to the comfort position C thereof.