| 摘要 |
<p>The device (1) comprises:
a support casing (2) with an opening (5) for the introduction of a hook member (A) connected to the door (P),
a retaining member or slider (6) movable between a rest position in which it allows the introduction of the hook member (A) into the opening (5) and a working position in which it is adapted to retain the hook member (A) introduced into this opening (5);
locking devices (9, 14, 20 to 34), including
a locking member (9) movable between a disengaged position and an engaged position in which it is adapted to allow or prevent, respectively, the passage of the retaining member (6) from the working position to the rest position,
an opposing member (14) associated with the locking member (9) and tending to keep it in the disengaged position, and
an electrically activatable control device (20 to 34) adapted to control the position of the locking member (9). The control device comprises
an electrically controllable actuator (25, 26), which has an associated movable control member (20) and which, as a consequence of its successive activations, tends to make the control member (20) alternately assume a first position and a second position, in which the control member (20) frees and urges the locking member (9), respectively, allowing it to remain in the disengaged position and keeping it in the engaged position against the action of the opposing element (14), respectively. The arrangement is such that, if the actuator (25, 26) happens to be energized while the door (P) is open, the retaining member or slider (6) prevents the locking member (9) from passing to the engaged or locking position, and the latter in turn locks the control member (20) in the first position, in such a way that when the door (P) is subsequently closed the door remains unlocked until the next activation of the actuator (25, 26).</p> |
