| 摘要 |
A hand tool having a handle and an output member mounted for rotation relative to the handle. An actuating member is mounted for rotation on the handle, and a reduction gear couples the actuating member to the output member. The reduction gear comprises a driving pinion, a restraint member permitting gyration of the pinion relative to the handle but preventing rotation thereof about its own axis, and an internally toothed annulus coaxial with and affixed to the output member and driven by said pinion. The actuating member is coupled to the pinion to cause gyration of the pinion and rotation of the output member when the actuating member is rotated relative to the handle. The tool can be used for making either coarse or fine adjustments.
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