Convertible vehicle seat

A vehicle seat assembly having a frame, a seat member having an inclined support surface and a back member movably mounted on said frame for movement between a seat-defining position in which the seat member is generally horizontal and the back member is upright and a bed-defining position in which the members are in general horizontal side-by-side positions, the back member having upper and lower ends, means pivotally supporting the back member at the lower end thereof for pivotal movement relative to the seat member, coacting track and roller means on said frame and said seat member supporting the seat member for general horizontal reciprocal movement relative to said frame between a forward location in the bed-defining position and a rearward location in the seat-defining position, said track and roller means including a least a pair of track portions and at least a pair of roller members spaced apart longitudinally of said track portions, said pair of roller members being engaged with one of said track portions in said seat-defining position and being movable therefrom into engagement with the other of said track portions in the bed-defining position of said seat assembly, said other track portion and said pair of roller members cooperating to maintain said seat member in a position in which said seat member support surface is generally horizontal, and means cooperating with the seat member to provide for the downwardly and rearwardly pivoting of the back member to its horizontal side-by-side position with the seat member in response to a forward movement of the seat member to its forward location in the bed-defining position of the vehicle seat assembly, and to provide for the upwardly and forwardly pivoting of the back member to its upright position in response to the rearward movement of the seat member to its rearward location in the seat-defining position of the vehicle seat assembly.