JPS5986136A - Cathode-ray tube - Google Patents

Abstract

PURPOSE:To firmly secure a magnet and a deflection yoke by providing recesses and a protrusions in the neck section of a cathode-ray tube. CONSTITUTION:When a magnet and a deflection yoke are tightened by providing recesses and protrusions on the neck surface of the magnet and deflection yoke mounting sections 4 and 5, they can firmly be secured independently of the temperature rise of the neck surface. Such recessing and protruding work can be performed by hydrofluoric acid etching and alumina powder spraying. By firmly securing the magnet and deflection yoke like this, the rotation by heat, shock, and oscillation can be prevented and the stability of purity convergence can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides the best method for attaching magnets and deflection yokes of color cathode ray tubes stably and accurately. To obtain this screen, the electron beam emitted from the electron gun must be correctly aligned with the fluorescent dots on the screen. Fix the deflection yoke (・However, as the temperature of the glass surface increases due to heat from the cathode ray tube heater, etc., the adhesiveness of the cloth adhesive tape deteriorates. Therefore, adjust the electron beam and attach the magnet and deflection yoke.) When fixing the magnet, if each magnetic plate of the magnet is tightened with a lock ring, the magnet body may rotate at the same time (・), which requires readjustment of the electron beam, reducing work efficiency (・Also, the magnet
Even after the deflection yoke was fixed, it could shift from the adjusted position due to impact vibration, etc. (also had a disadvantage). That is, the magnets for color cathode ray tubes consist of two 2-pole purity magnets, two 4-pole magnets, and two 6-frame static convergence magnets. Can be matched with light dots.

By rotating the quadrupole magnet, the left and right red R and blue B electron beams can be moved by the same amount in opposite directions.
By rotating the 6-pole magnet, the left and right red (几)
and blue (B) electron and electron beams can be moved by the same amount and in the same direction. In this way, it is possible to combine the red (R) and blue (B) electron beams with green (G) as the center, making the three color electron beams completely coincident.

As mentioned above, after adjusting the electron beam, if the lock ring is tightened due to shock, vibration, etc., and the magnet rotates, the perfectly aligned electron beams will separate (・The best screen was obtained. As mentioned before, readjustment was necessary.

The purpose of the present invention is to improve the above-mentioned points, and to firmly fix the magnet when it can be accessed to the neck of the f+;t+ joke cathode ray tube (Z). In order to achieve this object, the present invention is characterized in that the neck of the cathode ray tube, which is in contact with the magnet and the deflection yoke, is provided with irregularities.

The present invention will be described in detail below based on the drawings.

FIG. 1 shows adhesive tapes 4 and 5 wrapped around the neck, an electron beam adjustment magnet, and a deflection yoke. A magnet and a deflection yoke are attached to the positions of the neck parts 4 and 5, and the screw 10 is tightened to tighten the magnet. After adjusting the electron beam, when the lock ring 8 is tightened to fix the magnetic plate 9 of the magnet, the main body also turns at the same time due to the reasons described above. When attaching the magnet and deflection yoke, by providing irregularities on the neck interface of parts 4 and 5 and tightening the magnet and deflection yoke, it is possible to firmly fix the magnet and deflection yoke regardless of the temperature rise on the neck surface.

Such one-step unevenness processing can be performed by hydrofluoric acid etching, alumina powder spraying, etc.

By firmly fixing the magnet, yoke, and deflection yoke as described above, rotation due to heat, shock, and vibration can be prevented, and the stability of purity convergence can be maintained.

[Brief explanation of the drawing]

The drawing is a side view showing the position of the magnet and deflection yoke attached to the color cathode ray tube. 2... Braun tube, 3... Neck section,
4...Magnet installation part (adhesive tape),
5...Deflection yoke mounting part (adhesive tape),
6...Deflection yoke, 7...Deflection yoke tightening with screw, 8...Magnetic lock ring, 9...Magnet, 1o...Magnet tightening My name is Neji. 11 no drops■

Claims (2)

[Claims] (1) A cathode ray tube characterized by having irregularities on the outer surface of the neck in order to attach an electron beam adjusting magnet and a deflection yoke to the neck of the tube. (2) The unevenness of the outer surface of the neck portion is set to γ11. The cathode ray tube according to claim (1), characterized in that the magnet for adjusting the secondary beam and the attachment of the deflection yoke are provided on one or both of the parts (adhesive surface of the neck part).