| 摘要 |
The object of the invention is a method and an apparatus for adjusting mutual position of two structural elements of a patient chair, like the back rest and the head rest, articulated with each other, in which method the mutual position of the two structural elements ( 3, 4, 5 ) connected with each other by articulation is adjusted by a drive device ( 13 ). With the help of the drive device ( 13 ) it is possible to produce, for example, an essentially high rotational motion that can be converted to a linear motion with the help of a thread. The linear motion is converted to an essentially slow rotational motion with the help of a thread element ( 9 ) functionally connected to an articulated shaft ( 6, 7 ) belonging to the position adjustment mechanism.
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