| 摘要 |
<p>A roller (C) for locking the head (100) is "locked" by the pusher (B), which is itself blocked by 3 balls (400) each housed in three housings: (L1) provided in the pusher; (L2) provided in a fixed support of the pusher, (L3) in a sliding outer sleeve (F). If a motor and a suitable mechanical system (600, 500) move the sleeve in translation, the housing (L2) comes to coincide with the position of the ball. This is driven from (L1) by the pusher, which retracts, the roller (C) also retracts, and the head is actuated. The sleeve can withstand translational, rotational and helical movements. More immediate actuation, increased reliability, simplicity, weight saving, ease of maintenance.</p> |
