Fuse appliance
AssigneeNoark Electronics (Shanghai) Co. Ltd.
InventorKejun Lu
Life of this patent
Estimating the term…
Abstract
A fuse appliance has a fuse carrier for receiving a fuse and a base. The fuse carrier is in a cavity of the base and is manually operable to remove or insert the fuse. Fixed contacts are provided on the base which engage with moving contacts provided on the carrier. Wiring terminals are electrically connected to the fixed contacts. A rotational-linear pulling operation mechanism has a semicircular rotary shaft structure that has two semicircular convex shafts and first and second circular straight grooves fitted to each other so that the fuse carrier performs rotational and linear movements relative to the base and an interchange between rotational and linear movements at a transition position when the carrier is pulled out of or pushed into the appliance.
Claims11
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.
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 two 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;
- the rotational-linear pulling type operation mechanism comprises a semicircular rotary shaft structure and a linear movement type guide rail structure;
- the semicircular rotary shaft structure comprises two semicircular convex shafts, a first circular straight groove and a second circular straight groove, the linear movement type guide rail structure comprises two slider protrusions, a first guide rail groove and a second guide rail groove, the first guide rail groove and the second guide rail groove arranged in parallel;
- and the two slider protrusions are in slide fit with the first guide rail groove and the second guide rail groove respectively;
- the two semicircular convex shafts of the semicircular rotary shaft structure are in mounting fit with the first circular straight groove and the second circular straight groove respectively, and the two slider protrusions of the linear movement type guide rail structure are in mounting fit with the first guide rail groove and the second guide rail 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 two slider protrusions are separated from the first guide rail groove and the second guide rail groove respectively, whereby the fuse carrier performs rotational movement only in relation to the fuse appliance base and cannot perform linear movement;
- during an opening operation stage of the fuse appliance, the two slider protrusions enter inlets of the first guide rail groove and the second guide rail groove respectively, whereby 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;
- during a pull-out or push-in operation stage of the fuse appliance, the fuse carrier is constrained to perform linear movement only in relation to the fuse appliance base;
- the linear movement of the fuse carrier being constrained by the semicircular rotary shaft structure and by the linear movement type guide rail structure.
Dependencies are inferred from the claim text.