Patent ID: 11942289

Abstract:
In a vacuum container (1) of a vacuum interrupter (1A), an insulating cylindrical body (10) is sealed with a fixed-side flange (11a) on the fixed side in the axial direction, and is sealed with a movable-side flange (11b) on the movable side in the axial direction. In the fixed-side flange (11a) and the movable-side flange (11b), annular expansion portions (5a, 5b) are formed between middle portions (3a, 3b) and outer peripheral edge portions (4a, 4b), respectively. The annular expansion portions (5a, 5b) are respectively formed in annular shapes extending along the outer peripheries of the middle portions (3a, 3b), and in shapes expanding in the axial outer side direction of the vacuum container (1), such that an arch structural effect can be obtained.