Rocker arm mechanism for clamping an adjustable steering column

The invention relates to a rocker arm mechanism on a clamping device in an adjustable motor vehicle steering column for the detachable fixing of a housing for the steering column to a mounting on the chassis. The housing and mounting may be connected by means of at least one pair of co-operating friction surfaces which may be clamped together by means of the rocker arm mechanism. The rocker arm mechanism thus comprises a centrally arranged stud ( 3 ), which is displaceable in the direction of the mid-longitudinal axis ( 13 ) thereof and at least one rocker arm ( 6 ) arranged with the longitudinal axis ( 14 ) thereof roughly parallel to the stud mid-longitudinal axis ( 13 ). Said rocker arm ( 6 ) is supported either directly or indirectly on a stud head ( 4 ) and the other end thereof is located in a recess ( 10 ) on the front face of an operating collar ( 5 ). Said rocker arm ( 6 ) may be tipped by turning the operating collar ( 5 ), out into a locking closed position over the axial extent, parallel to the stud mid-longitudinal axis ( 13 ) and in the opposite direction into an open position. According to the invention, the operating collar ( 5 ) comprises at least one recess ( 11 ) for a further rocker arm ( 6 ) on the second front face facing away from the first rocker arm. The other end of said rocker arm ( 6 ) is supported on a pressure disc ( 7 ) which may be axially displaced in the direction of the mid-axis of the operating collar ( 5 ).