| 摘要 |
It comprises an arm (1) and a forearm (2) connected by an articulated joint by means of respective articulation configurations (4, 5) at adjacent ends. The articulation configuration (5) at the end of the forearm (2) consists of a core (8) with an exterior surface around a shaft (9), and the articulation configuration (4) at the end of the arm (1) consists of a surrounding wall around the core (8). The bearing means incorporated between the core (8) and said wall (10) guide a relative rotation between the two. There is a flexible pulling element (7) inside the arm (1), with a first end linked to an elastic element secured to a fixed point on the arm (1) and a second end (7b) secured in the core (8). This element (7) passes through a connection (29) in the configuration (4) and is partially housed in a space between the core (8) and the wall (10). |
