| 摘要 |
The assembly (2) is mounted to a fixed structure (3) at a first fixed pivot (4) and a second fixed pivot (6). The fixed pivots (4, 6) are spaced apart and are fixed in relation to one another. A first arm (8) is pivotally connected at a first position at one end to the first fixed pivot (4). A second arm (10) is pivotally connected at a first position at one end to the second fixed pivot (6). A third arm (12) is mounted at a first position at one end by a pivot connection (14) at the second end of the second arm (10). A first connecting arm (16) is mounted at one end by a pivot connection (18) at a second position on the first arm at the second end of the first arm (8). The second end of the first connecting arm is mounted by a pivot connection (20) to the third arm at a second position on the third arm (12). A second connecting arm (22) is mounted at one end by a pivot connection (24) to the first arm at a third position on the first arm (8) spaced from both the first and second positions. The second end of the second connecting arm (22) is mounted by the pivot connection (14) to both the second arm (10) and the third arm (12). The assembly further comprising a locking assembly comprising a first locking member (40) and a second locking member (42), the first locking member connected to one of the first, second or third arms or one of the first or second connecting arms and engaging with the second locking member at one or more positions from the retracted position to the extended position. |
