| 摘要 |
The said article comprises an articulation pin (4) engaged in the first and the second element (2, 3A); means (12, 28) to fix the first element (2) and the pin (4) in rotation; blocking means (22, 29) to fix the second element and the pin in rotation when they are in a predefined relative axial and angular position; the first and second elements (2, 3A) and also the pin (4) being adapted to cooperate so that the exertion of a couple between the first element (2) and the second element (3A) at least equal to a predetermined threshold, whilst the pin (4) and the second element (3A) are in the said predefined relative axial and angular position, produces a relative axial movement between the pin and the second element freeing the blocking means so that the pin is free to rotate in the second element. <IMAGE> |
