| 摘要 |
PROBLEM TO BE SOLVED: To prevent warpage of an electrode due to contact pressure during inputting in order to increase a breaking capacity without increasing an outer shape of the electrode, and reduce warpage of the electrode due to a difference of a thermal deformation amount during jointing.SOLUTION: The valve comprises a stationary electrode and a movable electrode opposed to each other in a vacuum vessel. The electrodes comprise a plate-like contact electrode 4 brought into a contact and non-contact state to the opposite electrode side, a coil electrode 6 for generating a vertical magnetic field, and an electrode rod 2 and a reinforcing plate 5 mounted to a center part of the contact electrode 4 and a ring part 6c of the coil electrode 6. A portion of the contact electrode 4 coupled with the reinforcing plate 5 is formed to project more than the other portion of the contact electrode, and a recess is formed for the reinforcing plate 5 so that it is fitted with a protrusion 4b of the contact electrode 4. Screw shapes are formed on an outer periphery of the protrusion part 4b of the contact electrode and an inner periphery of the recess of the reinforcing plate 5, and the reinforcing plate 5 and the contact electrode 4 are coupled with each other by both screw shapes. |
