| 摘要 |
The device includes a support structure (1) in which an assembly (21) of moving parts is mounted for movement along a predetermined direction and includes an electric actuator (23). This actuator is arranged to cause a control member (2, 3, 25) to move along the said direction in a working stroke, moving in one sense from a rest position to a working position and in the opposite sense to return to the rest position. Associated with this assembly (21-23) are two biasing springs (32, 33) and a releasable locking device (34, 41, 49) which is able to assume a normal locking condition, in which it holds the assembly (21-23) in a predetermined normal working position relative to the structure (1) against the action of the said springs (32; 33), and an emergency release condition in which it allows the assembly (21-23) of moving parts and its associated control member (2, 3, 25) to translate along this direction, in the opposite sense from the said first sense, for a distance at least equal to the said working stroke of the control member (2, 3, 25), under the action of the said springs (32, 33). |
