| 摘要 |
<p>the spring mechanism ensures that the auxiliary contacts are operated before the main contacts of the switch. The auxiliary contact block comprises at least one auxiliary contact with advanced closure, whose mobile bridge (11) is displaced within a space forming an insulating cage (110) under the action of a spring (15). The walls of the cage (110) have elements (13) which are able to support the element (12) on which the bridge is carried. This blocks the action of the spring, in such a way as to ensure an advanced opening of the auxiliary contact (11-9). The support element (12) is u-shaped, with the base shaped to be applied against the face of the cage near to the fixed auxiliary contacts, and to be solidly attached to the auxiliary bridge (11). It is also elastically deformable and has its ends terminated by portions (16) which are folded towards the interior of the cage.</p> |
