Flattable seat structure of automobile

A flattable seat structure of an automobile, comprising:

• a slide rail fixed to a floor of the automobile;
• a seat cushion composing a seat, the seat cushion having a front roller at its front side projected to a vehicle transverse direction outer side, the front roller being engaged with the slide rail in a front-and-rear direction slidably;
• a first lock mechanism for maintaining the seat cushion in a seated state;
• a seat back composing the seat, the seat back having a lower-end roller at its lower end projected to the vehicle transverse direction outer side, the lower-end roller being engaged with the slide rail in the front-and-rear direction slidably;
• a second lock mechanism for maintaining the seat back in a seated state;
• a cushion link whose one end is connected with a middle fulcrum of the seat cushion positioned in a rear side further than the front roller, the other end of the cushion link being connected with a middle portion of the slide rail;
• and
• a back link whose one end is connected with a middle fulcrum of the seat back positioned in an upper side further than the lower-end roller, the other end of the back link being connected with the middle portion of the slide rail,
• wherein after the first lock mechanism is released, the front roller is slid to the rear side so that the seat cushion is turned over in a forward-rotational direction;
• and
• wherein after the second lock mechanism is released, the lower-end roller is slid to the rear side so that the seat back is folded in a forward-rotational direction,
• thereby a back surface of the seat cushion, which faces upward and is in a horizontal state, is substantially level with a rear surface of the seat back which faces upward and is in the horizontal state.