Seat device for vehicles

A seat device for vehicles having a seat with a front portion and a rear portion, said device comprising:

• a supporting mechanism for pivotably mounting the front portion of the seat to a floor of a vehicle body;
• a fixing mechanism including a mounting member for pivotable attachment to the rear portion of said seat, a first engaging member coupled to said mounting member and engagable with the floor of the vehicle body when the seat is in a seating position and disengagable from the floor of the vehicle body when the seat is in an upright position, and a second engaging member coupled to said mounting member for engaging said seat to position the fixing mechanism in a fixing position when the seat is in the seating position;
• and
• a connecting mechanism having one end connected to said mounting member and said second engaging member and having another end coupled to said supporting mechanism, for controlling the engagement and disengagement of at least said second engaging member for pivoting the fixing mechanism to a retracted position during movement of the seat from the seating position to the upright position.