| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size of electrodes and a vacuum valve itself. SOLUTION: In the first electrode 1, a disk-like contact 4 concentric with a cylinder and having a hole in the vicinity of a center thereof is joined with one end of the conductive cylinder, the other end of the cylinder is covered with a bottom part, a conductive shaft 5 is fitted to the other end of the first electrode 1, a slit 3 having a predetermined angle with respect to the axis of the cylinder is provided in the first electrode 1. In the second electrode 2, the angle formed by the axes of the slit 3 and the cylinder is set to be substantially an angle formed between the slit 3 in the first electrode 1 and the axis of the cylinder subtracted from 180 deg., the slit 3 is provided so as to include a tangential line 8 of inner surfaces of the electrodes 1 and 2 or parallel lines 9 substantially parallel to the tangential line 8 of the inner surfaces in which the distance from the tangential line 8 is the slit width in the surface on the contact side of the first electrode 1, no slit is provided in the bottom part inside the first electrode 1, and the slit 3 is provided in the surface on the conductive shaft 5 side.
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