Upper contact assembly and fuse cutout having the same

A fuse cutout, comprising:

• an insulator, a fuse tube assembly, an upper contact assembly connected to an upper connection portion of the insulator, a lower contact assembly connected to a lower connection portion of the insulator, a lower terminal unit, and a mounting member;
• characterized in that said upper contact assembly comprises:
• a metal member, comprising a bottom plate provided with an aperture thereon and two side plates connected to the bottom plate, wherein a bottom surface of the bottom plate and the two side plates are formed with a first accommodation space therebetween, and the aperture is in communication with the first accommodation space;
• an electrically conductive plate provided with a first protrusion block thereon, being disposed in the first accommodation space, and being attached to the bottom surface of the metal member so as to make the first protrusion block be exposed out of the aperture;
• wherein the first protrusion block is formed with a first screw hole therein, and the first screw hole passes through the first protrusion block and the electrically conductive plate;
• a sheet metal spring, comprising a first segment and a second segment, wherein the first segment contacts with a bottom surface of the electrically conductive plate, and is provided with a first through hole thereon;
• a support unit, comprising a support member and two hook-like members, wherein the support member is formed with a second screw hole therein, and the second screw hole passes through the support member;
• a hollow cylindrical conductor having a first end and a second end, being disposed to be in contact with the first protrusion block by the first end thereof, wherein the second end is adapted for being connected to an electric wire;
• wherein an upper electrically conductive member extends out of the upper connection portion so as to be disposed on the support member, the upper electrically conductive member is provided with a third screw hole therein, and the third screw hole passes through the upper electrically conductive member;
• wherein after driving a bolt to pass through the second screw hole of the support member, the first through hole of the first segment, and the first screw hole in turns so as to be further inserted into the first end of the hollow cylindrical conductor, the hollow cylindrical conductor, the first protrusion block, the electrically conductive plate, and the first segment are formed with an electrical transmission path therebetween.