| 摘要 |
A motion mechanism comprises a substantially spherically curved holder, a substantially spherically curved bowl and a substantially spherically curved support element. The holder, bowl and support element, when inserted into eachpother in this order, are rotatable relative to each other about a first axis, the X-axis, and a second axis, the Y-axis. The axes lie in a plane substantially coinciding with the plane of the outer edge of the holder or extending parallel thereto. The holder is connected to the support element for rotation about the Y-axis and the support element together with the holder are connected to the bowl for rotation about the X-axis. The drive means for moving the holder about said axes can substantially be arranged in the holder itself.
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