| 摘要 |
A focusing lens structure for a cathode ray tube electron gun is provided to adjust independently functions of a terminal by improving a structure of a main focusing lens. An electric gun for a color cathode ray tube includes three emitting cathodes and successive electrodes arranged according to a longitudinal axis Z and designed in order to form and accelerate three in-line electronic beams. Each of two successive electrodes(150) includes three in-line openings of one central opening(100) and two lateral openings(101,102). The two electrodes are used for forming a focusing lens. One or more electrodes of the focusing lens include a plate(110) drilled with three openings. The edge includes an outer lip whose internal part is extended to the longitudinal direction. One or more electrodes of the focusing lens is formed to fold the plate drilled with three openings and separate a plane containing the central opening from a plane containing the lateral openings.
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