| 摘要 |
PURPOSE:To make a supporting means, abutted to a phosphor screen, adhere on the phosphor screen with the air pressure so as to prevent the occurrence of the relative deviation of the phosphor caused by the heat expansion of a front plate, by mounting an unit type deflection electrodes on the phosphor and joining a holding means attached on the electron beam source side with an adjoining member. CONSTITUTION:A supporting means 22 abutted to a phosphor 2 is fixed on a deflection electrode plate to be assembled as a unit body. The unit type deflection electrode 7 is mounted on the phosphor 2 through a positioning means 3 so that the deviation of the unit type deflection electrode 7 from the phosphor 2 is eliminated and thereby the damage of the phosphor 2 during the assembly is avoided. A holding means 8 attached on the electron beam source side is joined with an adjoining member so as to hold the interval between the unit type deflection electrodes 7 at a constant so that the variation of the interval can be eliminated at the time when the air pressure is applied to the electrode member. Besides, the means 22 abutted to the phosphor is made to be adherent to the phosphor and thereby the occurrence of the relative deviation of the phosphor from the unit type deflection electrode caused by the heat expansion of the front plate 1 is prevented. Thus, it is possible to prevent the damage of the phosphor 2 due to the relative deviation thereof.
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