| 摘要 |
This comprises an arm (1) and a forearm (2), joined together by respective articulation configurations (3, 4) located at adjacent ends (1a, 2a) of the same, which enables them to move between open and closed positions. There is a flexible tie bar (5) inside the arm (1), with a second end (5b) anchored to the articulation configuration (4) of end (2a) of forearm (2) and linked by a first end (5a) to an elastic traction element (6) anchored to a fixed point (7) on the arm (1) and an elastic compression element (8) located between a stop (9) on the flexible tie bar (5) and a support (10) of the end (1a) of the arm (1) in order to produce tension in the said tie bar (5) on moving from the open position to closed, generating torque tending towards the open position.
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