Long slide rail device for vehicle seat

In combination with a vehicle and a seat slidable on a floor of the vehicle, the seat including a seat back and a seat cushion foldable upright toward the seat back, a long slide rail device for use in said vehicle and seat, comprising:

• a long lower rail means fixed in the floor of said vehicle, said long lower rail means including a bottom wall disposed at a side of said floor of vehicle;
• a predetermine point defined in said vehicle, at which said predetermined point, said seat cushion of said seat must be folded upright toward said seat back of same seat to permit said seat to be slide past said predetermined point;
• an upper rail means fixed to a side of said seat cushion, said upper rail means being slidably fitted in said long lower rail means;
• and
• a locking means for locking and unlocking said upper rail means to an from said long lower rail means at a position corresponding to said predetermined point and permitting said seat to be slid past said predetermined point only when said seat cushion is folded upright, said locking means including;
• a female lock means provided at the bottom wall of said long lower rail means and disposed there at a point corresponding to said predetermined point;
• a male lock means which mounted on said upper rail means to be movable in a vertical direction to and from the bottom wall of said long lower rail means,
• wherein the male lock means is normally retained toward the bottom of said long rail means, wherein the male lock means, upon reaching said female lock means, is automatically engaged therewith to stop sliding movement of said upper rail means along said lower long rail means at said position corresponding to said predetermined point, said seat cushion being foldable upright toward said seat back at said predetermined point, wherein the male lock means engaged with the female means is moved upwardly from the bottom wall of said long lower rail means and released from the female lock means when said seat cushion is folded upright to allow further sliding movement of the upper rail means from said position corresponding to said predetermined point, wherein the seat may be slid with the seat back folded upright to the seat cushion past said predetermined point.