KR19990034099U - Electron Gun Assembly Spacer for Cathode Ray Tube - Google Patents

Abstract

The present invention relates to a spacer positioned between each electrode during assembly of the electron gun to maintain a constant gap between the electrodes. The structure of the spacer is improved to improve the structure of the spacer without changing the electrode in the bead mount state. It is to be able to easily take out the spacer fitted in the.

To this end, in a spacer in which an opening is formed to open in one direction and is sandwiched between the electrodes during assembly of the electrode of the electron gun to maintain the gap between the electrodes, the main bodies 11 and 12 having the openings 10a are symmetrical to each other. Since it is divided into two, scratches are generated on the connection surface with the electrode or the electrode is not deformed at the time of taking out, thereby improving the focus performance.

Description

Electron Gun Assembly Spacer for Cathode Ray Tube

The present invention relates to an electron gun encapsulated in the neck portion of a cathode ray tube, and more specifically, is located between each electrode when assembling an electron gun that emits an electron beam to a fluorescent surface of a panel to maintain a constant distance between each electrode. Relates to a spacer.

In general color cathode ray tube, red, green, and blue phosphors are coated on the inner surface of the panel to form a fluorescent film, and the back of the panel is a funnel with an electron gun encapsulated in the neck portion by fusion of glass and the inside is about 10 ^-7 Torr. Maintains a high vacuum level.

A shadow mask, which serves as a color screening function of the electron beam emitted from the electron gun, is fixed to the support frame at a portion adjacent to the fluorescent film applied to the inner surface of the panel, and the electron beam emitted from the electron gun is perpendicular to the outer peripheral surface of the funnel. Alternatively, a deflection yoke for deflecting in the horizontal direction is provided.

FIG. 1 is a front view illustrating an assembly state of an electron gun, and includes three cathodes 1 arranged horizontally and independently of each other, and a first electrode 2 arranged to maintain a predetermined distance from the cathodes to control hot electrons generated from the cathodes 2. And a second electrode 3 arranged to maintain a predetermined distance from the first electrode to accelerate and accelerate hot electrons gathered on the surface of the electron emission material (not shown) of the cathode, and the second electrode 3. Third and fourth electrodes 4 and 5 for prefocusing and accelerating the electron beam accelerated by the electrodes, and fifth electrode 6 for focusing and finally accelerating the electron beams accelerated by the third and fourth electrodes. And a grounding role of the graphite film coated on the inner surface of the funnel on one side (the traveling direction side of the electron beam) of the shield cup 8 fixed to the sixth electrode, and the sixth electrode 7 is disposed in sequence, Station to be supported at the center of neck A plurality of shield springs (not shown) for simultaneously performing the work is fixed, and each of the electrodes is integrated with a predetermined distance by the bead glass 9.

In the process of assembling the electrodes of the electron gun at a constant interval, the electrode 10 is assembled to the jig by inserting the spacer 10 having a shape as shown in FIG. 3 having the same thickness as the desired interval between each electrode and the electrodes. Next, the beads are bonded together at both sides of each electrode to integrate them, and then spacers sandwiched between the electrodes are removed to maintain a predetermined gap between the electrodes.

That is, as shown in FIG. 4, an electron beam formed at each electrode in the beading jig 13 composed of three pins 14 to be integrated by the bead glass 9 while keeping the distance between the electrodes constant. Insert the through hole.

Then, in order to make the spacing between the electrodes to the desired dimension, each spacer 10 having the same thickness as the desired spacing is sandwiched between the electrodes, and then the electrodes are crimped and then one of the glass beads 9 of the glass component as an insulator is pressed. The sides are melted to a high temperature and then adhered to the bead supporters protruding from the edges of the electrodes on both sides.

In this manner, after the plurality of electrodes are integrated by the bead glass 9 and the high temperature bead glass is cooled to room temperature, the assembled bead mount is taken out from the beading jig 13, and then the spacers are sandwiched between the electrodes. By removing 10), as shown in FIG. 2, a bead mount having a predetermined interval (a, b, c) between each electrode is obtained.

In order to secure excellent focusing performance during the assembly operation as described above, it is necessary to maintain the parallelism accurately while maintaining the distance between the respective electrodes.

In addition, the surface state of each electrode should also be free from deformation of the appearance as in the state of the parts before assembly.

However, as shown in FIG. 3, the conventional spacer 10 has an open side, and when pulled out from each electrode after assembling the bead mount, it has to be pulled by applying force in only one direction.

That is, in the state where the bead mount is made, the spacer 10 is in strong surface contact between the electrode and the electrode because the electrode is integrated into the bead glass while the electrodes are pressed during the assembly operation of the electron gun.

Therefore, in order to take out the spacer, it is necessary to pull the spacer 10 in one direction beyond the contact force between the electrode and the spacer. In this process, scratches are generated on the contact surfaces of the upper and lower electrodes surrounding the spacer 10.

In addition, the gap between the electrodes between the left and the right side is inconsistently deformed, which acts as a cause of lowering the focus performance, which is the most important element of the electron gun.

The present invention has been devised to solve such a problem in the related art, and the structure of the spacer can be improved to easily take out the spacer sandwiched between the electrodes without changing the electrode in the bead mount state. There is a purpose.

According to an aspect of the present invention for achieving the above object, in the spacer is formed between the openings are formed so that one direction is open to the electrode assembly of the electron gun to maintain the gap between the electrodes, the body with the openings are symmetrical mutually The spacer for assembling the electron gun of the cathode ray tube formed by dividing into two is provided.

1 is a front view showing the assembled state of the electron gun

2 is a side view showing a portion of the bead mount in cross section;

3 is a perspective view showing a conventional spacer

4 is an exploded perspective view of a state in which the electron gun is assembled using a conventional spacer;

5 is a perspective view showing a spacer of the present invention

6 is an exploded perspective view of a state in which the electron gun is assembled using the spacer of the present invention;

Explanation of symbols for main parts of the drawings

10a: opening 11, 12: main body

Hereinafter, the present invention will be described in more detail with reference to FIGS. 5 and 6.

5 is a perspective view showing a spacer of the present invention and Figure 6 is an exploded perspective view of the state of assembling the electron gun using the spacer of the present invention, the present invention is a conventional spacer for maintaining the gap between the electrodes during the assembly operation of the electron gun The main body 11 and 12 in which the opening part 10a was formed in the integrated form are divided and formed symmetrically.

Therefore, the main body 11 and 12 positioned between the electrodes in the state where the bead mount is obtained are pulled out from both the left and right sides with respect to the center of the electrode when taking out, so that the connection surface between the main body 11 and 12 and the electrode is taken out. In order to minimize the friction generated in the present invention, the gap between the electrodes generated during the take-out of the spacer and the occurrence of scratches on the surface of the electrode is prevented in advance.

In the present invention, since the main body 11 and 12 are divided into two, there is a possibility that the insertability may be degraded when inserted between the electrodes, so that the contact surfaces are formed of magnetic materials having different polarities.

Therefore, it is possible to take out them by integrating them by magnetism when assembling the electrodes and pulling them from both left and right sides during extraction.

As described above, the present invention pulls and removes the spacers from both sides of the electrode when the spacer is inserted between the electrodes in the state where the bead mount is made, so that scratches occur on the connection surface with the electrode or the electrode is deformed. This prevents the detection, thereby improving the focus performance, which is an important factor of the electron gun, thereby improving the resolution.

Claims (2)

In the spacer is formed so that the opening is open in one direction, the electrode is inserted between each electrode when assembling the electrode of the electron gun to maintain the gap between the electrodes, the electron gun assembly of the cathode ray tube formed by dividing the main body formed with the opening into two symmetrically Spacer. The method of claim 1, The main body is a spacer for assembling an electron gun of a cathode ray tube made of a magnetic material having different polarities of contact surfaces.