Vacuum interrupter

A vacuum interrupter comprising:

• an insulation cylinder;
• a fixed-side flange sealing one end of the insulation cylinder;
• a movable-side flange sealing another end of the insulation cylinder;
• a fixed-side electrode rod which is fixed to the fixed-side flange at one end, and has a fixed-side electrode fitting shaft protruding from a fixed-side end surface at another end and having a smaller outer diameter than the fixed-side end surface;
• a movable-side electrode rod which is, at one end, connected to the movable-side flange via a bellows on an inner side of the insulation cylinder, and has a movable-side electrode fitting shaft protruding from a movable-side end surface at another end and having a smaller outer diameter than the movable-side end surface, the movable-side electrode rod being slidable in an axial direction of the insulation cylinder;
• a fixed-side windmill-shaped electrode fixed to the fixed-side electrode fitting shaft and having a plurality of grooves formed in a swirl shape from a center part toward a peripheral part;
• and
• a movable-side windmill-shaped electrode fixed to the movable-side electrode fitting shaft so as to be opposed to the fixed-side windmill-shaped electrode, and having a plurality of grooves formed in a swirl shape from a center part toward a peripheral part, wherein
• a fixed-side support member is held between the fixed-side end surface and the fixed-side windmill-shaped electrode, the fixed-side support member including a fixed-side spacer portion which has a cylindrical shape and surrounds the fixed-side electrode fitting shaft while being distant from the fixed-side electrode fitting shaft, and a fixed-side planar portion which has a disk shape and which spreads outward from an outer circumferential side surface of the fixed-side spacer portion and is opposed to the fixed-side windmill-shaped electrode, and
• a movable-side support member is held between the movable-side end surface and the movable-side windmill-shaped electrode, the movable-side support member including a movable-side spacer portion which has a cylindrical shape and surrounds the movable-side electrode fitting shaft while being distant from the movable-side electrode fitting shaft, and a movable-side planar portion which has a disk shape and which spreads outward from an outer circumferential side surface of the movable-side spacer portion and is opposed to the movable-side windmill-shaped electrode.