MAGNETRON

申请公布号：

JPS56114256(A)

申请号：

JP19800015533

申请日期：

1980.02.13

申请公布日期：

1981.09.08

申请人：

HITACHI LTD

发明人：

KUROKUZUHARA MAMORU

分类号：

H01J23/10;H01J23/00

主分类号：

H01J23/10

摘要：

PURPOSE:To prevent the deformation of a frame body and damage of a permanent magnet by forming the bend part of a projection piece to thin body form and preventing an unnecessary force to be applied to the frame body having the projection piece with which a projection is engaged. CONSTITUTION:A circular notch 52a is formed at the side edge of the projection piece 52 of an upper frame body 5. As principally the notched part 52a is bent by a bendine force, the flat part of the upper frame body 5 is not subjected to a large load, and the deformation of the upper frame body 5 can be prevented. The notch formed on the projection piece 52 of the upper frame body 5 may be formed in a shape other than a circular form not having acute angle.