| 摘要 |
A contact surface (13) is provided on an eccentrically mounted rotatable lever (7). The lever engages with a rocking lever (1) by means of a protrusion (6) and a guide face (5) forming an acute angle with the contact surface. The eccentrically mounted lever is installed around the axis of pivot pins (2,3) for the mounting of the rocking lever. The guide face on the rocking lever and the protrusion engaging with the guide face are installed on the rotatable lever. |
