| 摘要 |
PURPOSE:To allow the fine adjustment in any direction by one action by constructing the fine-adjusting lever apparatus with a contact member that contacts the spherical surface of a ball shaft, pressing means that presses said contact member against the ball shaft and pivotable control lever. CONSTITUTION:A sliding member 24 which is energized by a compression spring 23 is slidably housed inside the fine control lever 22. The sliding member 24 has a protrusion 24a, and a contact member 25 having a conical inner surface that contacts the spherical surface of the protrusion is energized by the compression spring 23 so as to area-contacts the spherical surface of the ball shaft 14. The fine-adjusting lever 22 is made pivotable around the spherical part 22a, and outer cylinders 5, 6 of the spherical seat are made movable around the ball shaft 14 in response to the pivoting movement of the fine-adjusting lever 22. |
