| 摘要 |
A positioning device (10) comprising a central support (11), a drive arrangement comprising a drive motor (30, 31) and a drive line, and a pair of arms (13, 14), that extend from the central support (11) to an end point (25). The drive arrangement being operable to drive the pair of arms (13, 14), through the drive line for complete rotation about the central support (11) and for movement of the end point (25) through a plane defined by an X, Y axis, or by an X, Z axis, or by an Y, Z axis. The drive arrangement further being operable to drive an item (26) connected to the end point (25) through the drive line for continuous rotation about a further degree of freedom |
