KR940004107Y1 - Glass rod of electron gun for crt - Google Patents

Abstract

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Description

Glass rod of cathode ray gun

1 is a front view showing a process of manufacturing an electron gun structure of a typical cathode ray tube electron gun.

2a and 2b show the glass rod of the electron gun for cathode ray tubes according to the prior art, a is a perspective view, b is a front view.

3 is a front view for explaining a problem in the process of manufacturing the electron gun structure of the electron gun for cathode ray tube according to the prior art.

4 is a front view showing a process of manufacturing the electron gun structure of the electron gun for cathode ray tube according to the present invention

5a and 5b is a glass rod of the electron gun for cathode ray tube according to the present invention, a is a perspective view, b is a front view.

Figure 6 is a front view of another embodiment of the glass rod of the electron gun for cathode ray tube according to the present invention.

* Explanation of symbols for main parts of the drawings

2: fourth electrode 3: third electrode

4: second electrode 5: first electrode

6: cathode supporter 7: bead supporter

8: arm 21: glass rod

The present invention relates to a glass rod (g1ass rod) for coupling a plurality of electrodes in one structure in the manufacture of an electron gun for a cathode ray tube, in particular, to prevent the electrode assembly phenomenon and poor electrode assembly accuracy caused by the welding operation of the glass rod, The glass rod of the electron gun for cathode ray tubes which made it possible to improve the buried state of the electron gun structure and improve the stability of an electron gun structure.

The electrodes of a typical cathode ray tube electron gun are positioned at a predetermined distance from each other so as to be perpendicular to a path through which the electron beam passes, so that the electron beam generated from the cathode can be controlled at a constant intensity and shape to reach the screen surface.

This will be described in detail with reference to FIG. 1 as follows.

As shown in the figure, first, the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6 on the upper side of the bed 1; The bead supporter 7 is temporarily supported by the jig so that the electrode holes are aligned with each other.

On the other hand, the heating apparatus in the state which fixed the glass rod 11 (11 ') to the base 10 (10') integrally formed in the front-end | tip part of the arm (8) (8 ') which comprises a glass rod welding machine, respectively. When heated to, the glass rod 11 (11 ') is in a semi-melt state.

In this manner, when the glass rods 11 and 11 'are semi-molten, the two arms 8 and 8' of the glass rod fusion machine are rotated inward about the rotation shafts 9 and 9 '. As shown in FIG. 4, the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, and the cathode are formed on both inner surfaces of the glass rods 11 and 11 ′. Both edges of the supporter 6 and the bead supporter 7 are integrally embedded, and when cooled for a predetermined time, the electron gun structure 12 can be obtained.

However, the glass rod 11 (11 ') of the conventional cathode ray tube electron gun as described above is a rectangular parallelepiped having the same upper and lower thicknesses as shown in Figs. 2A and 2B, which has the following problems. .

That is, the glass rod 11, the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6, the bead support 7 The glass rod fusion splicer, which is coupled to one arm, rotates the arms 8 and 8 'by a predetermined angle about the rotation shafts 9 and 9', thereby moving the glass rods 11 and 11 'to the fourth electrode 2. The third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6, and the bead supporter 7 are approached to both edges thereof so that both edges thereof are the glass rod 11. As shown in FIG. 3, the inner surface of the glass rod 11 and the fourth electrode 2, as shown in FIG. 3, are inserted into both sides of the 11 '. A predetermined error angle θ is generated from the vertical alignment lines of the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter, and the bead supporter 7. A larger pressing force is applied to both edges of the fourth electrode 3 and the third electrode 3 positioned near the rotation center. On the contrary, the second electrode 4, the first electrode 5, and the cathode supporter 6 located far away from the rotation center. The pressing force is relatively small on both side edges of the bead supporter 7, and the fourth electrode 2 closest to the center of rotation contacts the glass rod 11 first, and the bead supporter farthest from the center of rotation. (7) comes in contact last.

Therefore, the assembly precision of the electron gun becomes poor, the phenomenon in which the arrangement of the electrodes is distorted, not only deteriorates the characteristics of the electron gun, but also the rotation speed of both arms 8 (8 ') is different so that the glass rod 11 11 ′ is formed at both edges of the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6, and the bead supporter 7. When the contact order is different from each other, the assembly precision of the electron gun and the electrode twist phenomenon become more serious.

The present invention is devised to solve the above-mentioned problems, the thinner the near side of the rotation center of the glass rod, the thicker the far side from the center of rotation of the glass rod, the fourth electrode when fusion fixing of the glass rod The third electrode, the second electrode, and the first electrode 'the cathode supporter and the bead supporter are simultaneously brought into contact with the same pressing force at the same pressing force, thereby improving the assembly precision of the electron gun and preventing the twisting of the electrode, thereby deteriorating the characteristics of the electron gun. It is configured to prevent the phenomenon, and to improve the stability of the electron gun structure by making the buried state of the glass rod more uniform, the present invention will be described below with reference to the accompanying drawings.

4 is a front view showing a process of manufacturing the electron gun structure of the cathode ray tube electron gun according to the present invention, 5a and 5b is a perspective view and a front view showing a glass rod of the electron beam gun for the cathode ray tube according to the present invention, as shown here In order to compensate the error angle θ as shown in FIG. 3, the glass rod 21 of the cathode ray tube electron gun according to the present invention is thinly formed near the center of rotation of the arm 8, and the center of rotation The far side is formed thicker so that the same pressing force is applied to the fourth electrode (2), the third electrode (3), the second electrode (4), the first electrode (5), the cathode supporter (6), and the bead supporter (7). It is configured to contact at the same time.

The glass rod 21 according to the present invention is thinly formed near the center of rotation of the arm 8. Since the far side from the rotation center is formed thick, it has a trapezoidal shape that forms a predetermined inclination angle α by both end surfaces.

The glass rod 21 may have an asymmetric trapezoidal shape as shown in FIG. 5B, and may have a symmetrical trapezoidal shape with respect to the vertical center line as shown in FIG.

The manufacturing process of the electron gun structure 12 by the glass rod 21 as described above is as follows.

First, the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6, the beads on the upper side of the bed 1 as in the conventional case The supporter 7 is temporarily supported by the jig so that each electrode hole in the frame is located in a straight line with each other, and then the glass rod (in the base 10 formed integrally with the distal end of the arm 8 constituting the glass rod welding machine) When the glass rod 21 is heated by a heating apparatus in a state where the 21 is fixed to each other, the glass rod 21 is in a semi-melt state. As such, both arms 8 of the glass rod fusion machine are rotated in a state in which the glass rod 21 is anti-melt state. When rotated toward the inner side (not shown), the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode on both inner surfaces of the glass rod 21 (5), both edges of the cathode supporter 6 and the bead supporter 7 are integrally buried and then cooled for a predetermined time, It is to obtain the jachong structure 12.

At this time, the glass rod 21 is formed thin in the side near the center of rotation of the arm 8, thickened in the far side from the center of rotation, formed in a trapezoidal shape to form a predetermined inclination angle (α) by both cross-sections. Since the fourth electrode 2, the third electrode 3, the second electrode 4, the first electrode 5, the cathode supporter 6 and the bead supporter 7 have the same pressing force at the same time, Contact.

As described above, the present invention forms a thin side near the rotation center of the glass rod and a thick side far from the rotation center, so that the fourth electrode, the third electrode, the second electrode, and the second electrode are fused and fixed to the glass rod. It is possible to improve the assembly precision of the electron gun by simultaneously contacting the two edges of one electrode, the cathode supporter and the bead supporter with the same pressing force, and prevent the twisting of the electrode as in the conventional case. This can be prevented.

In addition, the buried state of the glass rod can be made more uniform, thereby improving the stability of the electron gun structure.

Claims (3)

The glass rod 21 constituting the electron beam gun for the cathode ray tube is formed thin in the side near the rotation center of the arm 8 and thick in the side far from the rotation center, so that the fourth electrode 2 and the third electrode 3 are formed. The glass rod of the electron gun for cathode ray tube, characterized in that the second electrode (4), the first electrode (5), the cathode supporter (6), the bead supporter (7) is configured to simultaneously contact with the same pressing force at the same pressing force. The glass rod of the electron gun for a cathode ray tube according to claim 1, wherein the glass rod (21) has a trapezoidal shape having a predetermined inclination angle (α) by both end surfaces thereof. The glass rod of claim 2, wherein the glass rod (21) has an asymmetric trapezoidal shape or a symmetric trapezoidal shape with respect to a vertical center line.