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Conic-body for cathode-ray tube

A cathode ray and tube technology, applied in the direction of cathode ray tube/electron beam tube, cathode ray/electron beam tube shell/container, discharge tube, etc., can solve problems such as time delay and gap rise

Inactive Publication Date: 2006-07-12
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, on the main body of the cone, the short axis and the long axis, because the distance from the central axis is different, the gap between the bottom mold and the press mold is raised, and the elongation time of the glass reaching the large opening is also different. The time delay for the glass on the major axis side to reach the large opening compared to

Method used

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  • Conic-body for cathode-ray tube
  • Conic-body for cathode-ray tube
  • Conic-body for cathode-ray tube

Examples

Experimental program
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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0019] Fig. 1(A) is a cross-sectional view of a 90° portion (first quadrant) of a cone for a cathode ray tube at an arbitrary height h from the reference line for explaining the wall thickness distribution of the present invention, and Fig. 1(B) is the cone The side view of the whole body, figure 2 It is a graph showing an example of the thickness distribution state of the 90° portion (first quadrant) of the cone of the present invention.

[0020] As shown in Figure 1 (A) and Figure 1 (B), the cathode ray tube cone F is composed of a deflection system portion a on the small opening end side and a main body portion b on the large opening end side. The vertical cross-section is roughly quadrangular, with a long axis L, a short axis S, and a diagonal axis D. Except for the neck portion e, the deflection system portion a, the edge portion j, the anode buckle portion k, and the calibrati...

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Abstract

Wall thickness on a major axis L is set to the same value as before to prevent mechanical strength from being impaired. Furthermore, the wall thickness of a region from a major axis L to a diagonal axis D is made almost the same in molding the funnel with the wall thickness difference of 0.3 mm or less between the wall thickness on the major axis L and that on the diagonal axis D, and a uniform wall thickness area of almost the same wall thickness in molding the funnel with the wall thickness difference of 0.3 mm or less from the wall thickness on a minor axis S is formed over the range of the minor axis S from 90 DEG -(d+alpha ) DEG. The weight can thereby be reduced.

Description

Technical field [0001] The present invention relates to the weight reduction of the cone of a cathode ray tube used for television reception. Background technique [0002] Generally, a cathode ray tube used for television reception includes a front panel portion, a funnel-shaped cone portion on the rear side, and a neck portion for accommodating an electron gun. Moreover, as shown in Figure 3 (A) and (B), the cone part is composed of a deflection system part a at the end of the small opening and a body part b at the end of the large opening, which is perpendicular to the central axis X of the body part b. The cross-section of is roughly quadrangular, with a long axis L, a short axis S, and a diagonal axis D. [0003] The wall thickness of the cone F'for the existing cathode ray tube at any height h on the long axis L, the short axis S, and the diagonal axis D are T(Lh), T(Sh), T(Dh), respectively In general, T(Sh)<T(Lh)<T(Dh), in the first quadrant of 0°≤θ≤90°, and in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/86H01J29/02
CPCH01J29/861H01J2229/8606H01J29/02
Inventor 国武登志夫
Owner NIPPON ELECTRIC GLASS CO LTD
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