KR20040040783A - Deflection yoke - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to prevent movement of a magnet by firmly fixing the magnet at the screen portion of the coil separator. CONSTITUTION: A deflection yoke comprises a coil separator including a large aperture screen portion and a small aperture neck portion extended from the screen portion and arranged on the electron gun portion of a cathode ray tube; a fixing member(30) arranged on the outer surface of the screen portion, and which has a space formed in the fixing member, and a pair of elastic hooks(31) arranged at both sides of the fixing member; a magnet(20) accommodated in the space of the fixing member so as to adjust convergence characteristics; and an elastic piece(32) arranged on the bottom surface of the fixing member, and which elastically supports one surface of the magnet in the direction opposite to the direction of pressing force of the hooks.

Description

Deflection yoke

The present invention provides a deflection yoke having a magnet for correcting distortion on the screen. More specifically, the magnet provided on the screen side of the coil separator is firmly fixed without flow to improve distortion on the screen due to assembly dispersion. It is about deflection yoke.

In general, a deflection yoke used in a cathode ray tube (CRT) of a TV receiver or a monitor is provided with a deflection yoke as a device for accurately deflecting three-color beams scanned from an electron gun to a fluorescent film coated on the screen surface of the cathode ray tube.

The deflection yoke is the most important element of the magnetic device of the cathode ray tube. In order to reproduce an electric signal transmitted in a time series as an image in the cathode ray tube, the electron beam emitted from the electron gun is deflected two-dimensionally on the image plane. The deflection yoke is the deflection of the electron beam.

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.

1 is a side view showing a typical cathode ray tube, Figure 2 is an exploded perspective view showing a coil separator in a deflection yoke according to the prior art.

As shown in this figure, the deflection yoke 4 is located in the electron gun section 3 of the cathode ray tube 1 to deflect the RGB electron beam scanned from the electron gun 3a to the fluorescent film applied to the screen surface 2. The deflection yoke 4 has a coil separator 10 which is formed in left and right symmetry by injection molding in the form of a fallopian tube.

The coil separator 10 is provided to insulate the horizontal and vertical deflection coils that generate the deflection force in the horizontal and vertical directions, and to assemble their positions to a sufficient degree. The screen surface 2 of the cathode ray tube 1 Neck portion coupled to the electron gun (3) of the cathode ray tube (1) formed integrally extending from the screen portion 11 and rear cover 12 and the rear surface of the rear cover 12 and the center surface of the rear cover 12 (13) is formed.

The inner and outer 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. In addition, the coil separator 10 is provided on the outer circumferential surface, that is, to surround the vertical deflection coil 16, so that the ferrite core 14 is configured to reinforce the vertical magnetic field.

FIG. 2 is an exploded perspective view illustrating a coil separator having a structure in which a magnet is attached to a deflection yoke according to the related art, and FIG. 3 is a cross-sectional view illustrating the "A-A" line of FIG.

As shown in the drawing, the coil separator 10 is formed by a combination of a first separator 10a and a second separator 10b provided in a symmetrical left and right direction. A magnet 200 having a bar shape is provided on the main surface of the screen portion 11 on the mating interface between the second separator 10b and the second separator 10b.

At this time, the magnet 200 serves to correct the phenomenon that the electron beam deflected by the horizontal deflection coil 15 and the vertical deflection coil 16 is distorted on the screen.

That is, the magnet 200 is inserted into the fixture 100 is formed to protrude integrally on the main surface to the outside from the screen portion 11 of the coil separator 10 and is fixed while the flow is prevented by the hook 110 fastening method Is made possible.

Here, the fixture 100 protrudes from the main surface of the screen portion 11 of the interface between the first separator 10a and the second separator 10b formed on the main surface of the screen portion 11, and approximately one surface thereof. It is provided in an open box shape and has a structure in which a space portion into which the magnet 200 can be inserted is provided. As shown in the drawing, the fixture 100 is provided with an upper surface in an open shape, and the magnet 200 is inserted and fixed from the upper side.

However, in the deflection yoke as described above, the action force of the pair of hooks 110 provided at the inlet side of the fixture 100, that is, the end of the hook 110 is pressed down the upper surface of the magnet 200 as seen in the figure By maintaining the fixed state of the magnet 200, at this time, if the size of the magnet 200 is even a little smaller than the fastener 100, the fastening force of the hook 110 does not act correctly, the flow is There is a disadvantage that occurs.

As a result, the flow of the magnet 200 causes the distortion on the screen to be degraded, resulting in a problem of greatly reducing the reliability of the product.

Conventionally, in order to improve such a problem, the magnet 200 is inserted into the fixture 100, and then the adhesive is applied to prevent the flow of the magnet 200, but this is also workability and productivity by adding the adhesive coating process. Another problem is that the product aesthetics due to degradation and adhesive dripping become poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a deflection yoke which increases the mountability of a magnet mounted on the screen portion of the coil separator and prevents the degradation of the screen characteristics due to flow. .

1 is a side view showing a cathode ray tube employing a general deflection yoke.

2 is a view of the coil separator from the neck side in a deflection yoke according to the prior art;

3 is a cross-sectional view taken along line “A-A” of FIG. 2 according to the prior art.

Figure 4 is a view of the coil separator from the neck side in the deflection yoke according to the present invention.

5 is a cross-sectional view taken along the line "B-B" of FIG. 4 in accordance with the present invention.

Figure 6 is a partial perspective view of the fixture in the deflection yoke according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1: cathode ray tube 2: screen surface

3: electron gun 3a: electron gun

4: deflection yoke 10: coil separator

10a: 1st separator 10b: 2nd separator

11 screen portion 12 rear cover

13 neck portion 14 ferrite core

15: horizontal deflection coil 16: vertical deflection coil

20: magnet 30: fixture

31 hook 32: elastic piece

32a: incision

The deflection yoke according to the present invention for achieving the above object is a large diameter screen portion located on one side of the screen surface of the cathode ray tube, and a small diameter neck portion integrally extending from the screen portion and provided on the electron gun portion of the cathode ray tube. A coil separator comprising a first separator and a second separator which are symmetrical left and right and are combined into one; A fastener provided in a box shape having one surface open at equal intervals on the outer surface of the screen part, and having a predetermined size space therein and a pair of hooks having elasticity at both sides of the open inlet; A rod-shaped magnet in which an N · S pole is magnetized to be inserted and fixed to an inner space of the fixture to adjust convergence characteristics; It is formed integrally with the bottom surface of the fastener and characterized in that it comprises an elastic piece for elastically supporting one surface of the magnet in the opposite direction acting the pressing force of the hook.

As a preferable feature of the present invention, the fixture is formed so as to protrude integrally with the outer surface of the screen portion based on the mating interface of the first separator and the second separator.

As another preferable feature of the present invention, the elastic pieces are provided in plural intervals.

In another preferred aspect of the present invention, the elastic piece has one end connected to an incision cut off a portion of the bottom surface of the fastener, and the other end thereof protrudes at a predetermined angle so as to press the lower surface of the magnet.

Another embodiment of the deflection yoke according to the present invention is a coil separator consisting of a screen portion coupled to one screen surface of the cathode ray tube and a neck portion extending from the center surface of the rear cover and coupled to the electron gun of the cathode ray tube; Horizontal and vertical deflection coils are provided on the inner and outer surfaces of the coil separator to deflect the electron beam in the horizontal and vertical directions, and are provided in a box shape in which one surface is opened at equal intervals on the outer surface of the screen unit, and has a predetermined size therein. A fastener having a pair of hooks for providing a magnet for screen correction and having a pair of hooks pressing one surface of the magnet on both sides of the open inlet, and a bottom surface of the fastener and provided with a magnet in a direction opposite to the pressing force of the hook. Characterized in that it comprises an elastic piece for elastically supporting one surface.

Hereinafter, a deflection yoke according to the present invention will be described with reference to the accompanying drawings.

Figure 4 is a view of the coil separator from the neck side in the deflection yoke according to the invention, Figure 5 is a cross-sectional view showing the line "BB" of Figure 4 according to the present invention, Figure 6 is a fixture in the deflection yoke according to the present invention Partial perspective view.

Hereinafter, a description will be given with reference to FIG. 1 and like reference numerals refer to like parts.

First, as shown in FIG. 1, the deflection yoke 4 is located in the electron gun section 3 of the cathode ray tube 1, and a fluorescent film coated on the screen surface 2 with an RGB electron beam scanned from the electron gun 3a. The deflection yoke 4 has a coil separator 10 which is formed in left and right symmetry by injection molding in the form of a fallopian tube.

Here, the deflection yoke 4 has a horizontal deflection coil 15 for forming a horizontal deflection magnetic field on the inner surface of the coil separator 10, and a vertical deflection coil 16 for forming a vertical deflection magnetic field on the outer surface. This structure is provided. In addition, the ferrite core 14 is further provided on the outer surface of the coil separator 10, that is, to surround the vertical deflection coil 16 to strengthen the vertical magnetic field.

On the other hand, the coil separator 10, which is one component constituting the deflection yoke 4 as described above, is a kind of injection molding, and the positions thereof are insulated from the horizontal deflection coil 15 and the vertical deflection coil 16 as described above. Not only that, but also serves to provide a space for mounting a printed circuit board for connecting the respective electrical components of the deflection yoke 4 and the correction for performing the screen correction.

Such a coil separator 10 has a left and right symmetrical shape to have an approximately fallopian tube shape and is coupled to one, and has a large diameter screen portion 11 and a rear coupled to the rear surface side of the screen surface 2 of the cathode ray tube 1. The cover 12 and the neck portion 13 is formed integrally extending from the center surface of the rear cover 12 is coupled to the electron gun portion of the cathode ray tube.

In addition, the coil separator 10 has a structure in which the fixture 30 is integrally formed on the main surface of the screen unit 11, and in this case, the distortion phenomenon on the screen, that is, the miss convergence is corrected. As a means for the magnet 20 is inserted into the interference fit. Here, the magnet 20 is a permanent magnet in which the N-S pole is magnetized and has a rectangular shape having a magnetic flux density of a predetermined size, that is, a bar shape.

On the other hand, the fixture 30 forms a pair of hooks 31 in a direction opposite to both sides of the inlet side into which the magnet 20 is inserted, as in the past, wherein the pair of hooks 31 is the magnet When 20 is fully inserted into the fastener 30, it is a structure which forms the engaging piece (unsigned) of a triangular piece in the end part mutually facing so that the upper surface may be pressed downward.

This configuration is similar to the structure of the conventional deflection yoke.

However, in the present invention, the elastic pieces 32 are additionally provided to the respective fixtures 30 of the coil separator 10 including the first separator 10a and the second separator 10b, which are symmetrically left and right and are combined as one. The magnet 20 to be inserted into the fixture 30 is characterized in that the flow is prevented by receiving a resilient support force in the insertion direction.

That is, the fixture 30 is a structure having an elastic piece 32 to elastically support the lower surface opposite to the upper surface of the magnet 20 subjected to the pressing force of the hook 31 described above, wherein the elastic piece ( 32 is a structure that is integrally formed on the bottom surface side of the fixture 30 as seen in the figure, to prevent the flow of the magnet 20 through the action of elastically supporting the magnet 20 toward the hook 31 side. .

As shown in FIGS. 5 and 6, the elastic piece 32 is provided on the cutout portion 32a formed in a predetermined size on the bottom surface of the fastener 30, so as to have elasticity. One end thereof is connected to the cutout portion 32a, and the other end thereof has a structure that protrudes and has an acute angle in an upward direction.

That is, the elastic piece 32 is one end is connected to one side of the incision (32a) and the other end is to have a predetermined elasticity in the up and down direction by extending and protruding with an inclination in the upward direction, such elastic force The bottom surface of the magnet 20 to be inserted into the fastener 30 is elastically pressed upward to support it.

On the other hand, the elastic piece 32 is shown to be integrally provided on the bottom surface side adjacent to the hook 31 of the fastener 30, the present invention is not limited to this, the elastic piece 32 is a magnet 20 If it has a feature capable of uniformly pressing the bottom surface of the elastic piece 32, the number and shape of the elastic piece 32 may be variously modified.

In one example, the elastic piece is interposed between the bottom surface of the fixture and the bottom of the magnet in a state provided to have elasticity as a separate member without integrally formed on the bottom surface of the fixture as in the embodiment of the present invention It is also possible by.

The deflection yoke according to the present invention configured as described above is provided with a magnet 20 inserted into the fixture 30 provided on the screen portion 11 side of the coil separator 10 to correct distortion on the screen.

At this time, when the magnet 20 is completely inserted into the fixture 30, a pair of hooks 31 provided on both sides of the fixture 30 is caught on the upper surface of the magnet 20 to generate a fixing force Done.

On the other hand, the plurality of elastic pieces 32 provided on the bottom surface side of the fastener 30, when the magnet 20 enters into the fastener 30, the protruding end thereof is in contact with the bottom surface of the magnet 20.

At this time, since the assembly force applied to the magnet 20 is greater than the elastic force retained by the elastic piece 32, as a result, the elastic piece 32 is pressed by the magnet 20, i.e., the cutout 32a. Will cause elastic deformation to the side.

In this state, when the magnet 20 is completely inserted into the fixture 30, the upper surface of the magnet 20 is caught by a pair of hooks 31 provided on the inlet side of the fixture 30 The separation is prevented, and the lower surface thereof is elastically supported by the restoring force of the elastic piece 32.

That is, when the assembly force acting on the magnet 20 is released, the elastic piece 32 has its own restoring force, so that the tip portion which is elastically deformed toward the incision 32a forms an elastic restoration upward. The front end portion is to support the bottom surface of the magnet 20 by pressing upward.

Therefore, the magnet 20 has a fixed force of the hook 31 and the elastic pressing force of the elastic piece 32 act on the front and rear surfaces with respect to the direction in which the magnet 20 is inserted into the magnet 20 due to external impact. Deviation and flow of the is prevented, it is possible to compensate the flow due to the molding dispersion between the magnet 20 and the fixture 30.

Therefore, as the flow of the magnet 20 is prevented, the degradation of the screen quality due to the flow can be prevented in advance.

On the other hand, the above-described embodiment is merely described one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, 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 configured and acted as described above, it is possible to elastically press the front and rear both sides of the entry direction of the magnet inserted into the fixture so as to prevent flow due to external impact or scattering between the fixture and the magnet. can do.

Therefore, it is possible to stably suppress the flow of the magnet to perform the screen correction action, it is possible to prevent the degradation of the screen characteristics due to the magnet flow in advance, as a result has the advantage that can significantly improve the reliability of the product have.

In addition, in order to prevent the flow of the magnet is not accompanied by a separate work process, such as adhesive coating as before, there is an effect of reducing the manufacturing cost while improving workability and productivity by shortening the work process.

Claims (8)

A first separator having a large diameter screen portion located on one side of the cathode ray tube and a narrow neck portion integrally extending from the screen portion and provided on the electron gun portion of the cathode ray tube, which are symmetrical left and right and are combined into one. And a coil separator comprising a second separator; A fixture provided with a box shape having one surface open at equal intervals on the outer surface of the screen part, and having a predetermined size space therein and having a pair of hooks having elasticity at both sides of the open inlet; A rod-shaped magnet in which an N · S pole is magnetized to be inserted and fixed to an inner space of the fixture to adjust convergence characteristics; An elastic piece provided on the bottom surface of the fixture and elastically supporting one surface of the magnet in an opposite direction in which the pressing force of the hook is applied; Deflection yoke, characterized in that configured to include. The method of claim 1, wherein the fastener, The deflection yoke of claim 1, wherein the deflection yoke is integrally formed on the outer surface of the screen unit based on the interface between the first separator and the second separator. 2. The yoke of claim 1, wherein the elastic pieces are formed in plural at regular intervals. The method of claim 1, wherein the elastic piece, A deflection yoke characterized in that one end is connected to an incision part of the bottom surface of the fastener and the other end protrudes at a predetermined angle to press the lower surface of the magnet. A coil separator comprising a screen portion coupled to one screen surface of the cathode ray tube, a rear cover, and a neck portion extending from a center surface of the rear cover and coupled to an electron gun portion of the cathode ray tube; Horizontal and vertical deflection coils provided on inner and outer surfaces of the coil separator to deflect the electron beam in horizontal and vertical directions; A pair of hooks are provided in a box shape having one side open at equal intervals on the outer surface of the screen part, and having a predetermined size space therein to provide a magnet for screen correction and press one side of the magnet on both sides of the open inlet. A fixture formed thereon; An elastic piece provided on the bottom surface of the fixture and elastically supporting one surface of the magnet in an opposite direction in which the pressing force of the hook is applied; Deflection yoke, characterized in that configured to include. The method of claim 5, wherein the fastener, The deflection yoke of claim 1, wherein the deflection yoke is integrally formed on the outer surface of the screen unit based on the interface between the first separator and the second separator. 6. The yoke of claim 5, wherein the elastic piece is formed in plural with a predetermined interval. The method of claim 5, wherein the elastic piece, A deflection yoke characterized in that one end is connected to an incision part of the bottom surface of the fastener and the other end protrudes at a predetermined angle to press the lower surface of the magnet.