| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving mechanism for a moving body equipped with a female threaded part 4 fixed to the moving body and a male threaded part 5 engaged with the female threaded part and moving the moving body in a straight advancing direction under guidance of a guide mechanism with rotation of the male threaded part, allowing the male threaded part to make movement per unit rotation in very small strokes, allowing the moving body to move smoothly, and capable of precluding occurrence of such inconvenience that the advancing and retreating operations are heavy or become impossible to move. SOLUTION: The moving body is furnished with a number of balls 15 arranged in a loose fit in a ring shape on the inside surface of a cylindrical mounting surface a, and a cylinder 14 is installed being supported through the balls 15 by a leaf spring 16 extended from the side with the moving body in such a way as capable of making three-dimensional displacement and precluding rotation round the axis, wherein a female threaded part 4 is formed on the inside surface of the cylinder, and thereby the parallelism of the guide mechanism with the male threaded part is corrected in good performance. COPYRIGHT: (C)2005,JPO&NCIPI
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