| 摘要 |
1. Extensible support with at least two bearings, formed by two telescopic elements (4, 5) of which the relative position is controlled by a cam system (3) fast in rotation with one (4) of the elements, cooperating with a finger (2) fast with the other element (5), the cam constituting a closed circuit and defining support bearings (P0, P1, P2) at a low level and at least a high level, characterized by holding means provided at the level of at least a high bearing (P1, P2) defined by the cam-finger system (3, 2), said holding means being constituted by at least one abutment formed by a set-back (9) on the high periphery of the male telescopic element (4) and by a part (8) projecting from the female telescopic element (5). |
