| 摘要 |
In the device disclosed, the mechanism is hingedly incorporated between two relatively rigid structural parts (2, 3). The mechanism consists of at least two co-operating mechanism parts (4, 5, 6), each of which can undergo displacements on an imaginary surface, and the resultant displacement is defined by the lines of intersection of these imaginary surfaces. At least one of the mechanism parts (4-6) consists of two elements (8, 9) hingedly coupled to each other by a joint (7) and the other ends thereof to the structural parts (2, 3), respectively, by further joints (10, 11). The joint (11) can perform a movement in both directions from its central position transverse (arrow 13) to an imaginary line (12) laid through the joints (10, 11). The joint (11) reaches its closest position to the first joint (10) in its central basic position. |
