KR930008438Y1 - Magnet fixing device for convergence control of braun tube - Google Patents

Abstract

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Description

CRT's Convergence Adjustment Magnet Fixture

1 is an exploded perspective view of a conventional magnet fixing device.

2 is an assembly side view showing a state in which a conventional magnet fixing device is mounted on a CRT neck part.

Fig. 3 shows the principle of convergence adjustment in general screen adjustment, where (a) is the degree of adjustment by the purity magnet, (b) is the degree of adjustment by the 4-pole magnet, and (c) is the degree of adjustment by the 6-pole magnet.

4 is an exploded perspective view of the magnet fixing device of the present invention.

5 is an assembled cross-sectional view of the magnet fixing device according to the present invention mounted on the CRT neck portion.

* Explanation of symbols for main parts of the drawings

1: magnet support 1A, 1B, 1C, 1D: support elastic piece

1a, 1b, 1c, and 1d: Tip locking protrusion 1E: Supporting tetragonal portion

2: Purity magnet 3, 3 ', 3 ": Anti-rotation body

4: 6 pole magnet 5: 4 pole magnet

10: magnet fixed band 10E: band slope portion

11: Band ring 12: Band ring fastening screw

The present invention relates to a magnet fixing device for the convergence adjustment of the CRT, which is particularly suitable for preventing the convergence from the center of the screen due to the minute rotation of the magnet when fixing the magnet after the convergence adjustment is completed by the magnet during CRT adjustment. will be.

In order to apply a CRT to a TV or a monitor, it is generally completed in the order of exposure, coating, channel attachment, electron gun insertion, evacuation to vacuum the CRT tube, and reinforcement to prevent firecrackers in the CRT. The magnet fixing device for convergence adjustment, which is used in the screen adjustment work to be carried out, has a magnet support 1 for supporting the entire magnet as shown in FIGS. 1 and 2, and the whole magnet is fixed to the CRT neck 9. The main ring is equipped with a lock ring (7) and a lock ring fastening screw (8), and also has a purity (2-pole) magnet (2), a 4-pole magnet (5), a six-pole magnet (4), and an anti-rotation ring (3) (3). ') And the magnet fixing screw 6 for preventing the magnet from moving by external vibration or force after adjusting the convergence.

In the above technique, the deflection yoke and the magnet are mounted on the CRT neck 9, and the purity magnet 2 is used to match the purity of the entire screen as in the principle of FIG. 3A, and then the 4-pole magnet 5 (B) Adjust the convergence of the R and B beams as in the principle of the drawing using 6-pole magnets (4) and (c) Adjust the convergence of the R, B and G beams as in the principle of the drawing. After performing the screen adjustment, the entire magnet fixing screw 6 is rotated clockwise finely clockwise to detect the movement of each magnet (2) (4) (5). Fine rotation of the magnet results in the convergence of the R and B beams.

Such fine misconvergence is not a big problem considering the thickness of the electron beam in the CRT for TV, but in the CRT for the monitor, such minute misconvergence of the center of the screen causes more serious misconvergence at the periphery of the screen, resulting in worse convergence of the entire screen. The problem occurred and the manufacturing work was required.

The present invention has been made to solve the above problems, and in particular, it forms a support piece consisting of a plurality of pieces at the distal end of the magnet support, and a support regular surface portion having a cylindrical inclined surface in the tubular direction at the rear end thereof. It is characterized in that the magnet is provided with a fixing band to be fitted in contact with the slope to be applied in the direction of the tube axis along the square surface of the magnet support when assembled to the neck portion of the CRT.

That is, as shown in FIG. 4, the structure of the present invention includes a purity magnet 2, a 4-pole, a 6-pole magnet 5, 4, and an anti-rotation member 3, 3 ', 3 for preventing rotation of each magnet. The magnet in the magnet fixing structure consisting of a magnet support 1 for supporting each component to be a "), and a locking ring 7 and a lock ring fastening screw 8 for fixing the entire magnet support to the CRT neck portion. The support 1 has a front end projection 1a and 1b for elastically supporting and fixing each of the magnets 2, 4, 5 and the anti-rotation members 3, 3 ', 3 "at its distal end. (1c) (1d) and (1b) (1c) (1d), which are formed into a plurality of pieces while forming (1c) and (1d), and the cylindrical inclined surface in the tube axis direction is formed in the outer peripheral surface at the rear end thereof. The formed support inclined surface portion 1E is formed and a band inclined surface portion 10E having the same size as the support inclined surface portion 1E is formed as an inner circumferential surface. The magnet fixing band 10 and the magnet fixing band 10 are formed by forming a band ring 11 and a band ring fastening screw 12 for coupling the magnet support.

The present invention configured as described above has the following effects and effects.

Purity magnets (2) and four-pole magnets (5) for adjustment of convergence, as shown in Fig. 5, from the ends of the support elastic pieces (1A), (1B), (1C) and (1D) molded at the distal end of the magnet support (1); When the 6-pole magnet 4 is inserted with the anti-rotation members 3, 3 ', and 3 "interposed therebetween, the front end projections 1a of the support elastic pieces 1A, 1B, 1C, and 1D. (1b) (1c) (1d) prevents the separation of the magnets (2) (4) (5) so that they are fixed and fixed at the rear end of the purity magnet (2) to the magnet support (1) thus fixed. When the band 10 is tightened by the band ring 11 and the band ring fastening screw 12, the band inclined surface portion 10E of the magnet fixing band 10 is supported by the support inclined surface portion 1E of the magnet support 1 by the force. Sliding in the tubular direction (vertical to the magnet) along the movement so that the magnet (2) (4) (5) is completely fixed, and then the magnet support (1) and the locking ring (7) When the locking ring fastening screw 8 is fixed to the neck portion 9 of the CRT, it is possible to completely fix the neck portion 9 of the CRT without applying rotational force to the magnet.

Therefore, the present invention inclines the contact portion between the magnet support and the magnet fixing band, and wraps the magnet fixing band with the band ring and tightens it with the fastening screw, so that the magnet fixing band slides toward the magnet assembly part along the slope by the tightening force. Is a useful design to obtain a good convergence of the CRT screen as it can be fixed without rotational force.

Claims (1)

A magnet support and a fixing device for fixing a magnet for adjusting convergence to a neck portion of a CRT, wherein the magnets (2) (4) (5) and the anti-rotation members (3) (3 ') (3 ") are supported and fixed. In order to form the tip engaging projections 1a, 1b, 1c, and 1d, support elastic pieces 1A, 1B, 1C, and 1D, which form a plurality of pieces, are formed at the tip and each magnet is fixed when the magnet is fixed. Magnet support 1 having a configuration in which the cylindrical support inclined surface portion 1E in the tubular direction is formed on the outer circumferential surface of the rear end portion so that the force applied thereto is in a vertical direction, and the support inclined surface portion 1E is in contact with the magnet in the vertical direction. Magnet fixing device for the convergence adjustment of the CRT, characterized in that the magnet fixing band 10, the band ring 11, and the band ring fastening screw 12 formed with an inner circumferential surface of the band inclined surface portion 10E for applying force. .