| 摘要 |
PROBLEM TO BE SOLVED: To adjust a height of an arm at a use position that is to adjust height of the arm comprising an arm rest, not directly changing a regulation position of the arm but, by a change in the way of thinking, changing a rotation center of the arm.SOLUTION: An arm rest is composed rotatably across a storage position where an arm is rotated upward and a use position almost horizontal by the arm being rotated downward. A seat frame includes a rotational supporting shaft rotatably supporting one end of the arm to a seat frame and a stopper pin. In the arm, a stopper passage having an upper contact surface where to hold the arm at a use position by bringing the stopper pin into contact with the arm is formed and a side contact surface where to hold the arm at a storage position, by engaging an angular adjustment piece where a rotary hole through which the arm is inserted in the rotating supporting shaft and replacing the angular adjustment pieces, positions of the rotary hole are changed to change an arm height at the use position. |
