| 摘要 |
PURPOSE:To obtain a structural body of multiple electron guns, in which the electron guns are mechanically coupled mutually in a good condition, by constructing a connector with a ring-shaped metallic plate and interposing the connector mutually between the electron guns and cup-shaped body of convergence electrode. CONSTITUTION:End edges of the fourth grid electrodes G4, the point end electrodes of three electron guns, are welded to a flat part of a connector 8, and the end edge is not only previously reinforced by the connector 8, but the connector 8 is welded to a bottom part 6a under a condition inserted with peripheral edge tongue-shaped parts 9 of the connector 8 to slots 10 of the bottom part 6a of a cup-shaped body 6, even if a peripheral edge in a bottom part of the cup-shaped body 6 is in a curved surface, the cup-shaped body 6, that is, a convergence electrode 4 can be correctly secured without causing the generation of misalignment or deformation for the end parts of the three electron guns 1, 2, 3. Further an external shape of the connector 8 is formed to an almost triangle, and a security place of the connector 8 to the cup-shaped body 6 can be set to a flat position located toward the central part from the peripheral edge of the bottom part 6a, further with a merit a relatively large welding margin can be obtained. |
