| 摘要 |
A rotatable knob for fixation of an apparatus support includes a knob shell ( 1 ), a coupling part ( 2 ) for the connection of the knob shell to the spindle, a sleeve ( 3 ) which is connectable to the housing, a cover disc ( 4 ) which is secured by the sleeve ( 3 ) to the housing, a screw ( 5 ) arranged in the knob shell ( 1 ) for the setting of the holding force and a clamping disc ( 6 ) which cooperates with the knob shell ( 1 ) and the sleeve ( 3 ). The clamping disc ( 6 ) is guided in the knob shell ( 1 ) and is rotatably arranged on the sleeve ( 3 ) so that, on rotation of the knob shell, ( 1 ) the clamping disc ( 6 ) executes a synchronous rotary movement with the knob shell ( 1 ) and the linear movement with respect to the knob shell ( 1 ).
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