IRREVERSIBLE ADJUSTING MECHANISM AND VEHICLE SEAT THEREWITH

摘要

PURPOSE: An irreversible adjusting mechanism and a vehicle seat including the irreversible adjusting mechanism are provided to guide a coupling shaft fixed to an outlet member efficiently and to fasten the inlet member to the operating member simply. CONSTITUTION: An irreversible adjustment mechanism comprises a casing, a pivotally-mounted lever pressed resiliently towards the rest position, a pivotally-mounted intermediate member(20) connected to the lever via a drive stage adapted to move the intermediate member only when the lever moves away from the rest position, a fixed ring(33), and an outlet member(35) co-operating with the ring to define the wedge-shaped hollow facing in the opposite direction and receiving clamping bodies which are urged apart and which are flanked by two fingers that are part of the intermediate member. The outlet member is fastened to a coupling shaft(27) which is guided in rotation by a ring held by catches(12b) of the casing that pass through recesses in the inlet member while leaving the central portion of the inlet member visible, on which portion an actuating handle is be fixed.