Vehicle seat

A vehicle seat comprising:

• a seat structure having a seat cushion frame including a first seat side member and a second seat side member, and a seat back frame;
• a seat slide mechanism that movably locks the seat structure;
• a first upper riser that is fixed to the seat slide mechanism and supports the first seat side member;
• a second upper riser that is fixed to the seat slide mechanism and supports the second seat side member;
• a first locking mechanism that locks and unlocks the first seat side member to and from the seat slide mechanism;
• a second locking mechanism that locks the second seat side member to the seat slide mechanism when an excessive load is input
• a first hinge mechanism that allows the first seat side member to rotate with respect to the first upper riser;
• and
• a second hinge mechanism that allows the second seat side member to rotate with respect to the second upper riser;
• wherein the second hinge mechanism includes a rotating hinge pin and a bush, and
• a part of the bush is destroyed and the second seat member is movable when the excessive load is input;
• and
• wherein the bush has a first hole into which the rotating hinge pin is inserted in an initial state and a second hole that is located in front of the first hole, and
• partition walls of the first hole and the second hole are destroyed when the excessive load is inputted.