| 主权项 |
1. A fuse appliance, comprising a fuse carrier made of insulating material and a fuse appliance base made of insulating material, the fuse carrier having a fuse cavity for receiving a fuse, moving contacts being arranged on the fuse carrier on two sides of the fuse cavity, the fuse carrier being arranged, in a manually operable way, in a hollow cavity of the fuse appliance base that is formed by assembling a shell bottom and a shell cover, so as to remove or insert the fuse when the fuse is replaced by an operator, and fixed contacts and wiring terminals arranged on the sides of the fuse appliance base respectively, said fixed contacts come into contact with the moving contacts arranged on the fuse carrier, said wiring terminals electrically connect the fixed contacts of the fuse appliance with a main circuit respectively, wherein,
the fuse appliance further comprises a rotational-linear pulling type operation mechanism formed by a semicircular rotary shaft structure, the semicircular rotary shaft structure comprises two semicircular convex shafts and first and second circular straight grooves, and the two semicircular convex shafts are in mounting fit with the first circular straight groove and the second circular straight groove respectively, so that the fuse carrier performs rotational movement or linear movement in relation to the fuse appliance base, further wherein during a closing operation stage of the fuse appliance, the fuse carrier performs rotational movement in relation to the fuse appliance base only and cannot perform linear movement; during an opening operation stage of the fuse appliance, the fuse carrier performs an interchange between rotational movement and linear movement, in relation to the fuse appliance base at a transition position where the fuse carrier is pulled out of or pushed into the fuse appliance; and during a pull-out or push-in operation stage of the fuse appliance, the fuse carrier performs linear movement only in relation to the fuse appliance base. |
