Patent ID: 7862121

Claim:
A seat comprising: a first adjustable unit, provided to a seat body that is for sitting on, the first adjustable unit being adjusted by operation force transmitted from a first operating system; a second adjustable unit, provided to the seat body, the second adjustable unit being adjusted by operation force transmitted from a second operating system; an operation force imparting member for imparting operation force to the first operating system by operation in a first predetermined direction from a non-operation position and imparting operation force to the second operating system by operation in a second predetermined direction that is different from that of the first predetermined direction from the non-operation position, wherein the operation force imparting member includes at least one engaging portion; and a double operation prevention member configured to interact with the at least one engaging portion, when the operation force imparting member is operated in the first predetermined direction, to prevent operation of the operation force imparting member in the second predetermined direction, and when the operation force imparting member is operated in the second predetermined direction, prevent operation of the operation force imparting member in the first predetermined direction.