LEVER APPARATUS HAVING A FREELY MOVABLE FULCRUM AND MECHANICAL APPARATUS USING THE SAME

摘要

A movable fulcrum type lever apparatus comprising a lever member pivotally supported by a movable fulcrum. One end of the lever member is connected to a force point regulator, and the other end is connected to an action point regulator. The fulcrum includes a roller which is in rolling contact with a fulcrum guide groove of a fulcrum guide member, and the lever member is pivotally supported on a roller shaft. Alternatively, the fulcrum includes a slider inserted in the fulcrum guide groove. In this case, the lever member is pivotally supported on the slider.