KR20030002380A - Deflection yoke - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to allow assembly work for convergence yoke to be easily carried out, and to improve quality of a CRT by preventing damage of parts. CONSTITUTION: A deflection yoke comprises the following component. First, a coil separator(10) includes a screen portion coupled to a screen of a CRT, a rear plate(11b), and a neck portion(12) extended integrally from the center of the rear plate. Second, deflection coils are arranged inside and outside the coil separator and deflect electron beams in both vertical and horizontal directions. Third, a ferrite core is arranged outside the coil separator and reinforces magnetic field. Fourth, a plurality of hooks(30) are arranged at each constant interval along the outer periphery of the neck portion of the coil separator, wherein each of hooks has a protrusion(31) protruded outward from an end of the hook. Fifth, a convergence yoke(20) is arranged at the neck portion of the coil separator and corrects the convergence of screen with an insertion groove(25) formed at the inner periphery of the convergence yoke so as to avoid interference with hooks when the convergence yoke is fit to the neck portion of the coil separator.

Description

Deflection yoke

The present invention relates to a deflection yoke of a cathode ray tube (CRT), and more particularly, to a deflection yoke mounted on a neck of a deflection yoke to improve assembly of a converged yoke that focuses an electron beam precisely at the center of the screen. It is about.

Generally, the deflection yoke used in the cathode ray tube (CRT) of a TV receiver or monitor is provided with a deflection yoke to precisely deflect the three-color beams scanned from the electron gun to the fluorescent film coated on the screen surface of the cathode ray tube. The yoke is one of the most important elements of the cathode ray tube magnetic device. It acts to deflect the electron beam emitted from the electron gun so that an electric signal transmitted in time series can be reproduced as an image on the cathode ray tube screen.

That is, since the electron beam emitted from the electron gun goes straight onto the screen by the high voltage, only the central phosphor of the screen emits light, so the deflection yoke is deflected to reach the screen in the order of scanning from the outside. The yoke forms a magnetic field so that the electron beam is precisely deflected to the fluorescent film coated on the screen of the cathode ray tube by using a force that is changed when the electron beam passes through the magnetic field and the traveling direction thereof is changed.

FIG. 1 is a side view showing a typical cathode ray tube, and as shown, the deflection yoke 4 is positioned in the RGB electron gun portion 3 of the cathode ray tube 1 and scans an electron beam scanned from the electron gun 3a. The film is deflected by the fluorescent film applied to the film.

The deflection yoke 4 has a pair of coil separators 10 which are largely symmetrical and combined into one.

The coil separator 10 is provided to insulate the horizontal deflection coil 15 and the vertical deflection coil 16 and to assemble their positions to some degree. The screen is coupled to the screen surface side of the cathode ray tube 1. The neck portion 12 is integrally formed from the portion 11a, the rear plate 11b and the center surface of the rear plate 11b, and is coupled to the electron gun portion 3 of the cathode ray tube 1.

The inner and outer circumferential surfaces of the coil separator 10 are provided with a horizontal deflection coil 15 and a vertical deflection coil 16 for forming a horizontal deflection magnetic field and a vertical deflection magnetic field by power applied from the outside, respectively. A ferrite core 14 is provided to surround the deflection coil 16 to reinforce the vertical magnetic field.

That is, the coil separator 10 is provided with a horizontal deflection coil 15 for forming a horizontal deflection magnetic field on the upper and lower inner peripheral surface, and the vertical deflection coil 16 for forming a vertical deflection magnetic field on the upper and lower sides of the outer peripheral surface is wound. It is a structure.

Here, the horizontal deflection coil 15 and the vertical deflection coil 16 provided on the inner and outer surfaces of the coil separator 10 are drawn on the circuit board located on the outer surface of the coil separator 10 although not shown. It is configured to receive power by being connected to a terminal.

On the other hand, the outer peripheral surface of the neck portion 12 of the coil separator 10 to focus the electron beam scanned from the electron gun 3 of the cathode ray tube 1 to the center of the screen 2 accurately, that is to adjust the positive convergence A convergence yoke 20 is provided.

FIG. 2 is a partial perspective view of a deflection yoke showing a convergence yoke according to the prior art, and as shown, the convergence yoke 20 has a plurality of magnet rings 21a, 21b, 21c, and 21d having a ring shape and a separating piece 22. As shown in the figure, the convergence yoke 20 has a structure in which the magnet rings 21a, 21b, 21c, and 21d are arranged in pairs with the separating pieces 22 interposed therebetween.

As described above, the convergence yoke 20 including the plurality of magnet rings 21a, 21b, 21c, and 21d and the separating pieces 22 is inserted into the outer peripheral surface of the neck portion 12 of the coil separator 10, and the neck On the outer circumferential surface of the part 12, the magnet rings 21a, 21b, 21c, 21d and the separating piece 22 are provided with hooks 30 for fixing the convergence yoke 20.

Such, the hook 30 is formed in the incision portion cut to have a predetermined width and height at equal intervals on the outer diameter surface of the neck portion 12 as seen in the drawing, the upper end portion of the triangular piece to extend and protrude downward It is made of a structure to form a locking step 31 having a shape.

The hook 30 is the magnet ring (21a, 21b, 21c, 21d) and the separating piece 22 is inserted into the neck portion 12 in sequence, the bottom surface of the locking jaw 31 is the upper surface of the convergence yoke 20 That is, the upper surface of the magnet ring 21d positioned at the uppermost side is in contact with and locked.

However, in the conventional deflection yoke, there is a disadvantage in that the assembly of the convergence yoke 20 is poor because the hook 30 formed on the neck portion protrudes outward.

That is, the inner circumferential surface of each of the magnet rings 21a, 21b, 21c, and 21d constituting the convergence yoke 20 is formed to have a slightly larger size than the outer circumference of the neck portion 12, but the neck portion 12 There is a problem that the assembly operation is not easy because the hook 30 is caught when fitted in.

Therefore, in order to assemble the magnet ring 21a, 21b, 21c, 21d to the neck portion 12, an excessive assembly force of the operator is required, so that the magnet ring 21a, 21b, 21c, 21d or neck It causes the breakage of the part 12, causing a problem of increasing the product failure rate.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to provide an insertion groove having a size corresponding to the hook provided on the neck of the coil separator on the inner peripheral surface of the magnet ring constituting the convergence yoke It is an object of the present invention to provide a deflection yoke that facilitates the assembly of the converged yoke and prevents component breakage due to the assembly force.

1 is a side cross-sectional view showing a cathode ray tube employing a general deflection yoke;

Figure 2 is an exploded perspective view of the main portion showing the deflection yoke of Figure 1 according to the prior art,

3 is an exploded perspective view showing main parts of the deflection yoke of FIG. 1 according to the present invention;

4 is a perspective view showing another embodiment of FIG.

<Explanation of symbols for the main parts of the drawings>

1: cathode ray tube 2: screen surface

3: Electron gun 3: Electron gun

4: deflection yoke 10: coil separator

11a: screen portion 11b: rear plate

12 neck portion 14 ferrite core

15,16: deflection coil 20: convergence yoke

25: insertion groove 30: hook

The deflection yoke according to the present invention for realizing the above object comprises a coil separator comprising a screen portion coupled to a screen of a cathode ray tube, a rear plate and a neck portion integrally formed from a center surface of the rear plate, and the coil separator. Deflection coils provided on the inner and outer sides of the coil beam to deflect the electron beam in the vertical and horizontal directions, a ferrite core provided on the outer surface of the coil separator to strengthen the magnetic field, and a plurality of equally spaced along the outer circumferential surface of the neck of the coil separator. At least two hooks are formed on the neck portion of the coil separator and a hook having a protrusion formed to protrude outwardly to correct the positive convergence on the screen, and to prevent interference with the hook when inserted into the neck portion on the inner circumferential surface thereof. Consists of a convergence yoke formed with an insertion groove for It is characterized by.

Insertion groove of the convergence yoke of the present invention is characterized in that it is formed smaller than the size of the locking step formed in the hook.

The convergence yoke insertion groove of the present invention is characterized in that it is formed at a position corresponding to the hook formed in the neck portion.

Hereinafter, a preferred embodiment of a deflection apparatus of a cathode ray tube according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 is a cross-sectional view showing the main portion of the deflection yoke according to the present invention, which will be described below with reference to FIG. 1, but with the same reference numerals.

As shown therein, the deflection yoke according to the present invention comprises a coil separator 10 which is symmetrically separated in pairs and assembled integrally, wherein the coil separator 10 has a screen surface 2 of the cathode ray tube 1. Neck portion 12 which is integrally formed from the screen portion 11a coupled to the rear plate 11b and the center surface of the rear plate 11b and coupled to the electron gun portion 3 of the cathode ray tube 1. It is made of.

The coil separator 10 is provided with a horizontal deflection coil 15 and a vertical deflection coil 16 for forming a horizontal deflection magnetic field and a vertical deflection magnetic field by power applied from the outside to the inner and outer circumferential surfaces thereof. It insulates (15) and (16) and at the same time plays a role in positioning. And, the outer surface of the vertical deflection coil 16 is provided to surround the vertical deflection coil 16 is provided with a ferrite core 14 for strengthening the vertical magnetic field.

On the other hand, on the neck portion 12 of the coil separator 10, a plurality of magnet rings 21a, 21b, 21c, 21d constituting the convergence yoke 20 as a means for correcting positive convergence on the screen. And the separating piece 22 are fixed in position via the yoke clamp 23.

The convergence yoke 20 is caught by the hooks 30 formed at equal intervals on the outer diameter surface of the neck portion 12 and the position thereof is fixed.

This configuration is very similar to the structure of the conventional deflection yoke. However, in the present invention, the magnet rings 21a, 21b, 21c, and 21d constituting the convergence yoke 20 may be assembled without being caught by the hook 30 provided on the neck portion 12 of the coil separator 10. It has its characteristics.

The magnet rings 21a, 21b, 21c, and 21d are manufactured in a ring shape through which the center part is inserted so as to be inserted into the outer circumferential surface of the neck portion 12, and the N and S poles are alternated at equal intervals on the circular main surface. 2 or more poles are provided to be magnetized. In addition, a handle (not shown) is formed on one side of the outer circumference to protrude from the neck 12.

In the magnet ring 21a, 21b, 21c, and 21d, as shown in the drawing, insertion grooves 25 are formed on the inner circumferential surface at equal intervals, and the insertion grooves 25 are the neck portion 12 of the coil separator 10. It is formed to correspond to the hook 30 provided in. In addition, the insertion groove 25 of the magnet rings 21a, 21b, 21c, and 21d is formed to be smaller than the hooking jaw 31 of the hook 30 formed on the neck portion 12, and thus, the magnet ring 21a. , 21b, 21c, and 21d are configured to be fixed by the latching jaw 31 of the hook 30 in a state of being fitted to the neck portion 12.

That is, if two hooks 30 are provided at the neck portion 12 at equal intervals, two insertion grooves 25 are formed at equal intervals on the inner circumference of the magnet rings 21a, 21b, 21c, 21d. At this time, the insertion groove 25 is formed at a position corresponding to the hook (30).

On the other hand, when a separation piece for separating the magnet rings 21a, 21b, 21c, 21d constituting the convergence yoke 20 up and down is employed, the same as the insertion groove 25 formed in the magnet ring even on the inner circumference of the separation piece. Insertion grooves 25 of size may be formed.

When the magnet ring 21a, 21b, 21c, 21d according to the present invention configured as described above is inserted into the neck portion 12, the hook 30 of the neck portion 12 passes through the insertion groove 25 to the operator. It is easy to assemble without applying excessive assembly force.

In addition, since the size of the insertion groove 25 has a smaller size than the locking step 31 formed in the hook 30, the magnet ring (21a, 21b, 21c, 21d) inserted into the neck portion 12 is the most The magnet ring 21d positioned at the upper side is supported by a part of the locking jaw 31 of the hook 30 around the insertion groove 25, and as a result, the magnet ring 21a, 21b, 21c, and 21d is provided. The converged yoke 20 can be fixed to the neck portion 12.

On the other hand, the above embodiment is only a description of the preferred embodiment of the present invention, the scope of application of the present invention is not limited to this, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified.

According to the deflection yoke according to the present invention as described above, the magnet ring and the separating piece constituting the convergence yoke is formed in the inner periphery of the insertion groove to facilitate the insertion of the hook provided in the neck portion improves the assembly workability There is an advantage.

In particular, when assembling the converged yoke in the neck portion does not require an excessive assembly force it is possible to prevent the damage and damage due to this component has the advantage of improving the quality of the product.

Claims (3)

A coil separator comprising a screen portion coupled to the screen of the cathode ray tube, a rear plate, and a neck portion integrally extending from the center surface of the rear plate; Deflection coils provided on inner and outer sides of the coil separator and deflecting the electron beam in a vertical and horizontal direction; A ferrite core provided on an outer surface of the coil separator to strengthen a magnetic field; A plurality of hooks provided at equal intervals along an outer circumferential surface of the neck of the coil separator and having hooking protrusions protruding outward from the end portions; A convergence yoke provided on at least two neck portions of the coil separator to correct positive convergence on a screen and having insertion grooves formed on an inner circumferential surface to prevent interference with a hook when inserted into the neck portion; Deflection yoke, characterized in that consisting of The method of claim 1, wherein the insertion groove Deflection yoke, characterized in that formed smaller than the size of the locking step formed on the hook. The method of claim 1, wherein the insertion groove of the convergence yoke Deflection yoke, characterized in that formed in a position corresponding to the hook formed in the neck portion.