Patent ID: 7077474

Claim:
A seat system comprising: first and second independent seats each having a seat cushion and located at one side of the seat system and at the other side of the seat system, respectively, so as to be spaced apart from each other in the lateral direction of the seats; and an auxiliary seat having an auxiliary seat cushion switchable between a use state where the auxiliary seat is located between the independent seats to allow a passenger to be seated thereon and a non-use state, the auxiliary seat cushion being supported by the seat cushion of the second independent seat, wherein, the seat cushion of the second independent seat comprises a cushion base in which an upwardly opened recess is formed and a cushion seating part covering the recess so as to be freely opened and closed; the second independent seat side portion of the auxiliary seat cushion is connected to and supported by the cushion base of the second independent seat to be rotatable about an axis extending in a lengthwise direction of an automobile, thereby accommodating the auxiliary seat cushion in the non-use state in the recess of the second independent seat with the bottom of the auxiliary seat cushion directed upward; the seat cushion of the first independent seat has a projection located below the bottom of the auxiliary seat cushion in the use state and projecting toward the second independent seat side, the projection for restricting the first independent seat side portion of the auxiliary seat cushion in the use state from being displaced downward; a leg is provided on the bottom of the auxiliary seat cushion so as to extend toward the top of the projection when the auxiliary seat cushion is in the use state; the distal end of the leg of the auxiliary seat cushion in the non-use state is located lower than the bottom of the cushion seating part of the second independent seat in the closed state; and the top of the projection and the distal end of the leg of the auxiliary seat cushion in the use state have a predetermined distance therebetween and do not come in contact with each other when the passenger is seated on the auxiliary seat in the use state, but come in contact with each other when a load, larger than a load applied when the passenger is seated on the auxiliary seat in the use state, is applied from a seating surface side of the auxiliary seat cushion in the use state.