Vehicle seat slide apparatus

1. A vehicle seat slide apparatus comprising:

a lower rail configured to be fixed to a vehicle floor;

an upper rail configured to be fixed to a seat and slidably connected with the lower rail;

a lock mechanism that selectively locks a movement of the upper rail at an arbitrary position of the upper rail with respect to the lower rail;

a stopper mechanism that has a stopper portion provided in the lower rail and a stopper member movably provided in the upper rail, and locks the movement of the upper rail toward a predetermined position in one direction by making the stopper member and the stopper portion engage with each other at the predetermined position of the upper rail with respect to the lower rail;

an operation member that allows the movement of the upper rail, which is locked at the predetermined position, in the one direction by inputting an operation force for releasing to the stopper member; and

a guide portion that is formed on the stopper member, and guides the stopper member so as to release the engagement between the stopper member and the stopper portion in response to the movement of the upper rail, which is locked at the predetermined position, in an opposite direction of the one direction,

wherein the lock mechanism is a first lock mechanism that includes a first lock hole which is continuously formed on the lower rail in a front-rear direction and a first lock lever which has a first lock claw and is rotatably connected with the upper rail, and that locks the movement of the upper rail with respect to the lower rail by making the first lock claw inserted into the first lock hole,

wherein the stopper mechanism is a second lock mechanism that has a second lock hole, as the stopper portion, which is formed on the lower rail and a second lock lever, as the stopper member, which has a second lock claw and is rotatably connected with the upper rail, and that locks the movement of the upper rail with respect to the lower rail by making the second lock claw inserted into the second lock hole,

wherein the first lock claw is molded to be unable to be inserted into the second lock hole, and

wherein the second lock claw is molded to be unable to be inserted into the first lock hole.

2. The vehicle seat slide apparatus according to claim 1 ,

wherein the position of the upper rail with respect to the lower rail is divided into a front area and a rear area where the front area is a front-rear positional adjustment area of a first-row rear seat and the rear area is a front-rear positional adjustment area of a second-row rear seat, and

wherein the predetermined position is a boundary portion between the front area and the rear area.

3. The vehicle seat slide apparatus according to claim 1 ,

wherein the first lock mechanism and the second lock mechanism are respectively disposed on different sides of the lower rail in a width direction.

4. The vehicle seat slide apparatus according to claim 1 ,

wherein the guide portion is an inclined portion that is formed on the second lock claw and guides the second lock claw so as to be disengaged from the second lock hole through being pressed by the second lock hole in response to the movement of the upper rail in the opposite direction.